diff --git a/Android.bp b/Android.bp
index 1b6ffe4..45d022f 100644
--- a/Android.bp
+++ b/Android.bp
@@ -112,6 +112,7 @@
         "androidx.preference_preference",
         "androidx.slice_slice-view",
         "androidx.cardview_cardview",
+        "com.google.android.material_material",
         "iconloader_base",
     ],
     manifest: "AndroidManifest-common.xml",
diff --git a/AndroidManifest-common.xml b/AndroidManifest-common.xml
index d725a16..4eecf29 100644
--- a/AndroidManifest-common.xml
+++ b/AndroidManifest-common.xml
@@ -144,7 +144,7 @@
         <activity
             android:name="com.android.launcher3.settings.SettingsActivity"
             android:label="@string/settings_button_text"
-            android:theme="@style/HomeSettingsTheme"
+            android:theme="@style/HomeSettings.Theme"
             android:exported="true"
             android:autoRemoveFromRecents="true">
             <intent-filter>
diff --git a/quickstep/res/drawable/ic_sysbar_accessibility_button.xml b/quickstep/res/drawable/ic_sysbar_accessibility_button.xml
new file mode 100644
index 0000000..e0d5406
--- /dev/null
+++ b/quickstep/res/drawable/ic_sysbar_accessibility_button.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2018 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="21dp"
+    android:height="21dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:pathData="M20.5,6c-2.61,0.7 -5.67,1 -8.5,1S6.11,6.7 3.5,6L3,8c1.86,0.5 4,0.83 6,1v13h2v-6h2v6h2V9c2,-0.17 4.14,-0.5 6,-1L20.5,6zM12,6c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2s-2,0.9 -2,2S10.9,6 12,6z"
+        android:fillColor="@android:color/white"
+        />
+</vector>
\ No newline at end of file
diff --git a/quickstep/res/drawable/ic_sysbar_rotate_button_ccw_start_0.xml b/quickstep/res/drawable/ic_sysbar_rotate_button_ccw_start_0.xml
new file mode 100644
index 0000000..ff5cb9e
--- /dev/null
+++ b/quickstep/res/drawable/ic_sysbar_rotate_button_ccw_start_0.xml
@@ -0,0 +1,187 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2020 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<animated-vector xmlns:android="http://schemas.android.com/apk/res/android" xmlns:aapt="http://schemas.android.com/aapt">
+    <aapt:attr name="android:drawable">
+        <vector android:name="root"
+                android:width="28dp"
+                android:height="28dp"
+                android:viewportWidth="28.0"
+                android:viewportHeight="28.0">
+            <!-- Use scaleX to flip icon so arrows always point in the direction of motion -->
+            <group android:name="icon" android:pivotX="14" android:pivotY="14"
+                   android:scaleX="1">
+                <!-- Tint color to be set directly -->
+                <path android:fillColor="#FFFFFFFF"
+                      android:pathData="M12.02,10.83L9.25,8.06l2.77,-2.77l1.12,1.12l-0.85,0.86h5.16c0.72,0 1.31,0.56 1.31,1.26v9.16l-1.58,-1.58V8.85h-4.89l0.86,0.86L12.02,10.83zM15.98,17.17l-1.12,1.12l0.85,0.86h-4.88v-7.26L9.25,10.3v9.17c0,0.7 0.59,1.26 1.31,1.26h5.16v0.01l-0.85,0.85l1.12,1.12l2.77,-2.77L15.98,17.17z"/>
+            </group>
+        </vector>
+    </aapt:attr>
+
+    <!-- Repeat all animations 5 times but don't fade out at the end -->
+    <target android:name="root">
+        <aapt:attr name="android:animation">
+            <set android:ordering="sequentially">
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+            </set>
+        </aapt:attr>
+    </target>
+    <target android:name="icon">
+        <aapt:attr name="android:animation">
+            <set android:ordering="sequentially">
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="100"
+                                android:duration="600"
+                                android:valueFrom="0"
+                                android:valueTo="-90">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="0"
+                                android:valueTo="0"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="0"
+                                android:valueTo="-90">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="0"
+                                android:valueTo="0"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="0"
+                                android:valueTo="-90">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="0"
+                                android:valueTo="0"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="0"
+                                android:valueTo="-90">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="0"
+                                android:valueTo="0"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="0"
+                                android:valueTo="-90">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+            </set>
+        </aapt:attr>
+    </target>
+</animated-vector>
\ No newline at end of file
diff --git a/quickstep/res/drawable/ic_sysbar_rotate_button_ccw_start_90.xml b/quickstep/res/drawable/ic_sysbar_rotate_button_ccw_start_90.xml
new file mode 100644
index 0000000..90fedb1
--- /dev/null
+++ b/quickstep/res/drawable/ic_sysbar_rotate_button_ccw_start_90.xml
@@ -0,0 +1,187 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2020 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<animated-vector xmlns:android="http://schemas.android.com/apk/res/android" xmlns:aapt="http://schemas.android.com/aapt">
+    <aapt:attr name="android:drawable">
+        <vector android:name="root"
+                android:width="28dp"
+                android:height="28dp"
+                android:viewportWidth="28.0"
+                android:viewportHeight="28.0">
+            <!-- Use scaleX to flip icon so arrows always point in the direction of motion -->
+            <group android:name="icon" android:pivotX="14" android:pivotY="14"
+                   android:scaleX="1">
+                <!-- Tint color to be set directly -->
+                <path android:fillColor="#FFFFFFFF"
+                      android:pathData="M12.02,10.83L9.25,8.06l2.77,-2.77l1.12,1.12l-0.85,0.86h5.16c0.72,0 1.31,0.56 1.31,1.26v9.16l-1.58,-1.58V8.85h-4.89l0.86,0.86L12.02,10.83zM15.98,17.17l-1.12,1.12l0.85,0.86h-4.88v-7.26L9.25,10.3v9.17c0,0.7 0.59,1.26 1.31,1.26h5.16v0.01l-0.85,0.85l1.12,1.12l2.77,-2.77L15.98,17.17z"/>
+            </group>
+        </vector>
+    </aapt:attr>
+
+    <!-- Repeat all animations 5 times but don't fade out at the end -->
+    <target android:name="root">
+        <aapt:attr name="android:animation">
+            <set android:ordering="sequentially">
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+            </set>
+        </aapt:attr>
+    </target>
+    <target android:name="icon">
+        <aapt:attr name="android:animation">
+            <set android:ordering="sequentially">
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="100"
+                                android:duration="600"
+                                android:valueFrom="90"
+                                android:valueTo="0">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="90"
+                                android:valueTo="90"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="90"
+                                android:valueTo="0">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="90"
+                                android:valueTo="90"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="90"
+                                android:valueTo="0">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="90"
+                                android:valueTo="90"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="90"
+                                android:valueTo="0">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="90"
+                                android:valueTo="90"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="90"
+                                android:valueTo="0">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+            </set>
+        </aapt:attr>
+    </target>
+</animated-vector>
\ No newline at end of file
diff --git a/quickstep/res/drawable/ic_sysbar_rotate_button_cw_start_0.xml b/quickstep/res/drawable/ic_sysbar_rotate_button_cw_start_0.xml
new file mode 100644
index 0000000..a89e7a3
--- /dev/null
+++ b/quickstep/res/drawable/ic_sysbar_rotate_button_cw_start_0.xml
@@ -0,0 +1,187 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2020 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<animated-vector xmlns:android="http://schemas.android.com/apk/res/android" xmlns:aapt="http://schemas.android.com/aapt">
+    <aapt:attr name="android:drawable">
+        <vector android:name="root"
+                android:width="28dp"
+                android:height="28dp"
+                android:viewportWidth="28.0"
+                android:viewportHeight="28.0">
+            <!-- Use scaleX to flip icon so arrows always point in the direction of motion -->
+            <group android:name="icon" android:pivotX="14" android:pivotY="14"
+                   android:scaleX="-1">
+                <!-- Tint color to be set directly -->
+                <path android:fillColor="#FFFFFFFF"
+                      android:pathData="M12.02,10.83L9.25,8.06l2.77,-2.77l1.12,1.12l-0.85,0.86h5.16c0.72,0 1.31,0.56 1.31,1.26v9.16l-1.58,-1.58V8.85h-4.89l0.86,0.86L12.02,10.83zM15.98,17.17l-1.12,1.12l0.85,0.86h-4.88v-7.26L9.25,10.3v9.17c0,0.7 0.59,1.26 1.31,1.26h5.16v0.01l-0.85,0.85l1.12,1.12l2.77,-2.77L15.98,17.17z"/>
+            </group>
+        </vector>
+    </aapt:attr>
+
+    <!-- Repeat all animations 5 times but don't fade out at the end -->
+    <target android:name="root">
+        <aapt:attr name="android:animation">
+            <set android:ordering="sequentially">
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+            </set>
+        </aapt:attr>
+    </target>
+    <target android:name="icon">
+        <aapt:attr name="android:animation">
+            <set android:ordering="sequentially">
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="100"
+                                android:duration="600"
+                                android:valueFrom="0"
+                                android:valueTo="90">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="0"
+                                android:valueTo="0"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="0"
+                                android:valueTo="90">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="0"
+                                android:valueTo="0"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="0"
+                                android:valueTo="90">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="0"
+                                android:valueTo="0"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="0"
+                                android:valueTo="90">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="0"
+                                android:valueTo="0"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="0"
+                                android:valueTo="90">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+            </set>
+        </aapt:attr>
+    </target>
+</animated-vector>
\ No newline at end of file
diff --git a/quickstep/res/drawable/ic_sysbar_rotate_button_cw_start_90.xml b/quickstep/res/drawable/ic_sysbar_rotate_button_cw_start_90.xml
new file mode 100644
index 0000000..0dc67b0
--- /dev/null
+++ b/quickstep/res/drawable/ic_sysbar_rotate_button_cw_start_90.xml
@@ -0,0 +1,187 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2020 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<animated-vector xmlns:android="http://schemas.android.com/apk/res/android" xmlns:aapt="http://schemas.android.com/aapt">
+    <aapt:attr name="android:drawable">
+        <vector android:name="root"
+                android:width="28dp"
+                android:height="28dp"
+                android:viewportWidth="28.0"
+                android:viewportHeight="28.0">
+            <!-- Use scaleX to flip icon so arrows always point in the direction of motion -->
+            <group android:name="icon" android:pivotX="14" android:pivotY="14"
+                   android:scaleX="-1">
+                <!-- Tint color to be set directly -->
+                <path android:fillColor="#FFFFFFFF"
+                      android:pathData="M12.02,10.83L9.25,8.06l2.77,-2.77l1.12,1.12l-0.85,0.86h5.16c0.72,0 1.31,0.56 1.31,1.26v9.16l-1.58,-1.58V8.85h-4.89l0.86,0.86L12.02,10.83zM15.98,17.17l-1.12,1.12l0.85,0.86h-4.88v-7.26L9.25,10.3v9.17c0,0.7 0.59,1.26 1.31,1.26h5.16v0.01l-0.85,0.85l1.12,1.12l2.77,-2.77L15.98,17.17z"/>
+            </group>
+        </vector>
+    </aapt:attr>
+
+    <!-- Repeat all animations 5 times but don't fade out at the end -->
+    <target android:name="root">
+        <aapt:attr name="android:animation">
+            <set android:ordering="sequentially">
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+                <!-- Linear fade out -->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="1700"
+                                android:valueFrom="1"
+                                android:valueTo="0"
+                                android:interpolator="@android:anim/linear_interpolator"/>
+                <!-- Linear fade in-->
+                <objectAnimator android:propertyName="alpha"
+                                android:duration="100"
+                                android:startOffset="100"
+                                android:valueFrom="0"
+                                android:valueTo="1"
+                                android:interpolator="@android:anim/linear_interpolator" />
+            </set>
+        </aapt:attr>
+    </target>
+    <target android:name="icon">
+        <aapt:attr name="android:animation">
+            <set android:ordering="sequentially">
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="100"
+                                android:duration="600"
+                                android:valueFrom="90"
+                                android:valueTo="180">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="90"
+                                android:valueTo="90"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="90"
+                                android:valueTo="180">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="90"
+                                android:valueTo="90"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="90"
+                                android:valueTo="180">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="90"
+                                android:valueTo="90"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="90"
+                                android:valueTo="180">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+
+                <!-- Reset rotation position for fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:startOffset="1300"
+                                android:duration="100"
+                                android:valueFrom="90"
+                                android:valueTo="90"/>
+
+                <!-- Icon rotation with start timing offset after fade in -->
+                <objectAnimator android:propertyName="rotation"
+                                android:duration="600"
+                                android:valueFrom="90"
+                                android:valueTo="180">
+                    <aapt:attr name="android:interpolator">
+                        <pathInterpolator android:pathData="M 0.0,0.0 c0.408,1.181 0.674,1.08 1.0,1.0"/>
+                    </aapt:attr>
+                </objectAnimator>
+            </set>
+        </aapt:attr>
+    </target>
+</animated-vector>
\ No newline at end of file
diff --git a/quickstep/res/layout/taskbar.xml b/quickstep/res/layout/taskbar.xml
index e680233..d61a895 100644
--- a/quickstep/res/layout/taskbar.xml
+++ b/quickstep/res/layout/taskbar.xml
@@ -13,12 +13,12 @@
      See the License for the specific language governing permissions and
      limitations under the License.
 -->
-
 <com.android.launcher3.taskbar.TaskbarDragLayer
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/taskbar_container"
     android:layout_width="wrap_content"
-    android:layout_height="wrap_content">
+    android:layout_height="wrap_content"
+    android:clipChildren="false">
 
     <com.android.launcher3.taskbar.TaskbarView
         android:id="@+id/taskbar_view"
@@ -26,30 +26,32 @@
         android:layout_height="wrap_content"
         android:gravity="center"
         android:forceHasOverlappingRendering="false"
+        android:layout_gravity="bottom"
+        android:clipChildren="false" />
+
+    <FrameLayout
+        android:id="@+id/navbuttons_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
         android:layout_gravity="bottom" >
 
         <LinearLayout
-            android:id="@+id/system_button_layout"
+            android:id="@+id/start_nav_buttons"
             android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
+            android:layout_height="match_parent"
             android:paddingLeft="@dimen/taskbar_nav_buttons_spacing"
             android:paddingRight="@dimen/taskbar_nav_buttons_spacing"
-            android:forceHasOverlappingRendering="false"
-            android:gravity="center" />
+            android:gravity="center_vertical"
+            android:layout_gravity="start"/>
 
-        <LinearLayout
-            android:id="@+id/hotseat_icons_layout"
+        <FrameLayout
+            android:id="@+id/end_nav_buttons"
             android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:forceHasOverlappingRendering="false"
-            android:gravity="center" />
-
-    </com.android.launcher3.taskbar.TaskbarView>
-
-    <com.android.launcher3.taskbar.ImeBarView
-        android:id="@+id/ime_bar_view"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:visibility="gone"/>
+            android:layout_height="match_parent"
+            android:paddingLeft="@dimen/taskbar_nav_buttons_spacing"
+            android:paddingRight="@dimen/taskbar_nav_buttons_spacing"
+            android:gravity="center_vertical"
+            android:layout_gravity="end"/>
+    </FrameLayout>
 
 </com.android.launcher3.taskbar.TaskbarDragLayer>
\ No newline at end of file
diff --git a/quickstep/res/layout/taskbar_nav_button.xml b/quickstep/res/layout/taskbar_nav_button.xml
new file mode 100644
index 0000000..985f928
--- /dev/null
+++ b/quickstep/res/layout/taskbar_nav_button.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ImageView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="@dimen/taskbar_nav_buttons_size"
+    android:layout_height="@dimen/taskbar_nav_buttons_size"
+    android:background="@drawable/taskbar_icon_click_feedback_roundrect"
+    android:scaleType="center"/>
\ No newline at end of file
diff --git a/quickstep/res/values/dimens.xml b/quickstep/res/values/dimens.xml
index 60eeaff..d8899a6 100644
--- a/quickstep/res/values/dimens.xml
+++ b/quickstep/res/values/dimens.xml
@@ -16,7 +16,7 @@
 
 <resources>
     <dimen name="task_thumbnail_icon_size">48dp</dimen>
-    <dimen name="task_thumbnail_icon_size_grid">32dp</dimen>
+    <dimen name="task_thumbnail_icon_size_grid">40dp</dimen>
     <!-- For screens without rounded corners -->
     <dimen name="task_corner_radius_small">2dp</dimen>
     <!-- For Launchers that want to override the default dialog corner radius -->
@@ -37,10 +37,10 @@
     <dimen name="overview_actions_horizontal_margin">16dp</dimen>
 
     <dimen name="overview_grid_top_margin">77dp</dimen>
-    <dimen name="overview_grid_bottom_margin">90dp</dimen>
+    <dimen name="overview_grid_bottom_margin">70dp</dimen>
     <dimen name="overview_grid_side_margin">54dp</dimen>
     <dimen name="overview_grid_row_spacing">42dp</dimen>
-    <dimen name="overview_grid_focus_vertical_margin">90dp</dimen>
+    <dimen name="overview_grid_focus_vertical_margin">40dp</dimen>
     <dimen name="split_placeholder_size">110dp</dimen>
 
     <!-- These speeds are in dp/s -->
@@ -148,11 +148,9 @@
 
     <!-- Taskbar -->
     <dimen name="taskbar_size">60dp</dimen>
-    <dimen name="taskbar_icon_size">44dp</dimen>
     <dimen name="taskbar_icon_touch_size">48dp</dimen>
     <dimen name="taskbar_icon_drag_icon_size">54dp</dimen>
-    <!-- Note that this applies to both sides of all icons, so visible space is double this. -->
-    <dimen name="taskbar_icon_spacing">8dp</dimen>
     <dimen name="taskbar_folder_margin">16dp</dimen>
     <dimen name="taskbar_nav_buttons_spacing">16dp</dimen>
+    <dimen name="taskbar_nav_buttons_size">48dp</dimen>
 </resources>
diff --git a/quickstep/robolectric_tests/src/com/android/launcher3/model/WidgetsPredicationUpdateTaskTest.java b/quickstep/robolectric_tests/src/com/android/launcher3/model/WidgetsPredicationUpdateTaskTest.java
index 7c97b93..5471e49 100644
--- a/quickstep/robolectric_tests/src/com/android/launcher3/model/WidgetsPredicationUpdateTaskTest.java
+++ b/quickstep/robolectric_tests/src/com/android/launcher3/model/WidgetsPredicationUpdateTaskTest.java
@@ -48,6 +48,7 @@
 import com.android.launcher3.shadows.ShadowDeviceFlag;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.IntArray;
+import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.util.LauncherModelHelper;
 import com.android.launcher3.util.ViewOnDrawExecutor;
@@ -239,8 +240,8 @@
         }
 
         @Override
-        public int getPageToBindSynchronously() {
-            return 0;
+        public IntSet getPagesToBindSynchronously() {
+            return IntSet.wrap(0);
         }
 
         @Override
@@ -259,7 +260,7 @@
         public void finishFirstPageBind(ViewOnDrawExecutor executor) { }
 
         @Override
-        public void finishBindingItems(int pageBoundFirst) { }
+        public void finishBindingItems(IntSet pagesBoundFirst) { }
 
         @Override
         public void preAddApps() { }
@@ -287,7 +288,7 @@
         public void bindAllWidgets(List<WidgetsListBaseEntry> widgets) { }
 
         @Override
-        public void onPageBoundSynchronously(int page) { }
+        public void onPagesBoundSynchronously(IntSet pages) { }
 
         @Override
         public void executeOnNextDraw(ViewOnDrawExecutor executor) { }
diff --git a/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java b/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
index 1bf3627..fc1556e 100644
--- a/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
+++ b/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
@@ -56,6 +56,7 @@
 import com.android.launcher3.taskbar.TaskbarStateHandler;
 import com.android.launcher3.uioverrides.RecentsViewStateController;
 import com.android.launcher3.util.ActivityOptionsWrapper;
+import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.ObjectWrapper;
 import com.android.launcher3.util.UiThreadHelper;
 import com.android.quickstep.RecentsModel;
@@ -351,14 +352,6 @@
     }
 
     @Override
-    public float getNormalTaskbarScale() {
-        if (mTaskbarUIController != null) {
-            return mTaskbarUIController.getTaskbarScaleOnHome();
-        }
-        return super.getNormalTaskbarScale();
-    }
-
-    @Override
     public void onDragLayerHierarchyChanged() {
         onLauncherStateOrFocusChanged();
     }
@@ -412,8 +405,8 @@
     }
 
     @Override
-    public void finishBindingItems(int pageBoundFirst) {
-        super.finishBindingItems(pageBoundFirst);
+    public void finishBindingItems(IntSet pagesBoundFirst) {
+        super.finishBindingItems(pagesBoundFirst);
         // Instantiate and initialize WellbeingModel now that its loading won't interfere with
         // populating workspace.
         // TODO: Find a better place for this
diff --git a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
index 65df237..dccc9e1 100644
--- a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
+++ b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
@@ -1074,7 +1074,15 @@
     }
 
     private boolean launcherIsATargetWithMode(RemoteAnimationTargetCompat[] targets, int mode) {
-        return taskIsATargetWithMode(targets, mLauncher.getTaskId(), mode);
+        for (RemoteAnimationTargetCompat target : targets) {
+            if (target.mode == mode && target.taskInfo != null
+                    // Compare component name instead of task-id because transitions will promote
+                    // the target up to the root task while getTaskId returns the leaf.
+                    && target.taskInfo.topActivity.equals(mLauncher.getComponentName())) {
+                return true;
+            }
+        }
+        return false;
     }
 
     /**
diff --git a/quickstep/src/com/android/launcher3/WrappedLauncherAnimationRunner.java b/quickstep/src/com/android/launcher3/WrappedLauncherAnimationRunner.java
index e319275..fcf9857 100644
--- a/quickstep/src/com/android/launcher3/WrappedLauncherAnimationRunner.java
+++ b/quickstep/src/com/android/launcher3/WrappedLauncherAnimationRunner.java
@@ -58,6 +58,8 @@
         if (animationRunnerImpl != null) {
             animationRunnerImpl.onCreateAnimation(transit, appTargets, wallpaperTargets,
                     nonAppTargets, result);
+        } else {
+            result.setAnimation(null, null);
         }
     }
 }
diff --git a/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduDialog.java b/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduDialog.java
index 14b0c5d..c7c2567 100644
--- a/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduDialog.java
+++ b/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduDialog.java
@@ -85,7 +85,7 @@
         mSampleHotseat = findViewById(R.id.sample_prediction);
 
         DeviceProfile grid = mActivityContext.getDeviceProfile();
-        Rect padding = grid.getHotseatLayoutPadding();
+        Rect padding = grid.getHotseatLayoutPadding(getContext());
 
         mSampleHotseat.getLayoutParams().height = grid.cellHeightPx;
         mSampleHotseat.setGridSize(grid.numShownHotseatIcons, 1);
diff --git a/quickstep/src/com/android/launcher3/taskbar/ButtonProvider.java b/quickstep/src/com/android/launcher3/taskbar/ButtonProvider.java
deleted file mode 100644
index 540f748..0000000
--- a/quickstep/src/com/android/launcher3/taskbar/ButtonProvider.java
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright 2021 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.launcher3.taskbar;
-
-import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_BACK;
-import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_HOME;
-import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_IME_SWITCH;
-import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_RECENTS;
-
-import android.annotation.DrawableRes;
-import android.view.View;
-import android.widget.ImageView;
-
-import com.android.launcher3.R;
-import com.android.launcher3.taskbar.TaskbarNavButtonController.TaskbarButton;
-
-/**
- * Creates Buttons for Taskbar for 3 button nav.
- * Can add animations and state management for buttons in this class as things progress.
- */
-public class ButtonProvider {
-
-    private final int mMarginLeftRight;
-    private final TaskbarActivityContext mContext;
-
-    public ButtonProvider(TaskbarActivityContext context) {
-        mContext = context;
-        mMarginLeftRight = context.getResources()
-                .getDimensionPixelSize(R.dimen.taskbar_icon_spacing);
-    }
-
-    public View getBack() {
-        // Back button
-        return getButtonForDrawable(R.drawable.ic_sysbar_back, BUTTON_BACK);
-    }
-
-    public View getDown() {
-        // Ime down button
-        return getButtonForDrawable(R.drawable.ic_sysbar_back, BUTTON_BACK);
-    }
-
-    public View getHome() {
-        // Home button
-        return getButtonForDrawable(R.drawable.ic_sysbar_home, BUTTON_HOME);
-    }
-
-    public View getRecents() {
-        // Recents button
-        return getButtonForDrawable(R.drawable.ic_sysbar_recent, BUTTON_RECENTS);
-    }
-
-    public View getImeSwitcher() {
-        // IME Switcher Button
-        return getButtonForDrawable(R.drawable.ic_ime_switcher, BUTTON_IME_SWITCH);
-    }
-
-    private View getButtonForDrawable(@DrawableRes int drawableId, @TaskbarButton int buttonType) {
-        ImageView buttonView = new ImageView(mContext);
-        buttonView.setImageResource(drawableId);
-        buttonView.setBackgroundResource(R.drawable.taskbar_icon_click_feedback_roundrect);
-        buttonView.setPadding(mMarginLeftRight, 0, mMarginLeftRight, 0);
-        buttonView.setOnClickListener(view -> mContext.onNavigationButtonClick(buttonType));
-        return buttonView;
-    }
-
-}
diff --git a/quickstep/src/com/android/launcher3/taskbar/ImeBarView.java b/quickstep/src/com/android/launcher3/taskbar/ImeBarView.java
deleted file mode 100644
index 287caab..0000000
--- a/quickstep/src/com/android/launcher3/taskbar/ImeBarView.java
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- * Copyright 2021 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.launcher3.taskbar;
-
-import android.content.Context;
-import android.util.AttributeSet;
-import android.view.View;
-import android.widget.RelativeLayout;
-
-import com.android.launcher3.views.ActivityContext;
-
-public class ImeBarView extends RelativeLayout {
-
-    private ButtonProvider mButtonProvider;
-    private View mImeView;
-
-    public ImeBarView(Context context) {
-        this(context, null);
-    }
-
-    public ImeBarView(Context context, AttributeSet attrs) {
-        this(context, attrs, 0);
-    }
-
-    public ImeBarView(Context context, AttributeSet attrs, int defStyleAttr) {
-        super(context, attrs, defStyleAttr);
-    }
-
-    public void init(ButtonProvider buttonProvider) {
-        mButtonProvider = buttonProvider;
-
-        ActivityContext context = getActivityContext();
-        RelativeLayout.LayoutParams imeParams = new RelativeLayout.LayoutParams(
-                context.getDeviceProfile().iconSizePx,
-                context.getDeviceProfile().iconSizePx
-        );
-        RelativeLayout.LayoutParams downParams = new RelativeLayout.LayoutParams(imeParams);
-
-        imeParams.addRule(ALIGN_PARENT_END);
-        imeParams.setMarginEnd(context.getDeviceProfile().iconSizePx);
-        downParams.setMarginStart(context.getDeviceProfile().iconSizePx);
-        downParams.addRule(ALIGN_PARENT_START);
-
-        // Down Arrow
-        View downView = mButtonProvider.getDown();
-        downView.setLayoutParams(downParams);
-        downView.setRotation(-90);
-        addView(downView);
-
-        // IME switcher button
-        mImeView = mButtonProvider.getImeSwitcher();
-        mImeView.setLayoutParams(imeParams);
-        addView(mImeView);
-    }
-
-    public void setImeSwitcherVisibility(boolean show) {
-        mImeView.setVisibility(show ? VISIBLE : GONE);
-    }
-
-    private <T extends Context & ActivityContext> T getActivityContext() {
-        return ActivityContext.lookupContext(getContext());
-    }
-}
diff --git a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
index c2d107c..9a836aa 100644
--- a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
@@ -15,40 +15,44 @@
  */
 package com.android.launcher3.taskbar;
 
+import static com.android.launcher3.anim.Interpolators.LINEAR;
+import static com.android.launcher3.taskbar.TaskbarViewController.ALPHA_INDEX_HOME;
+import static com.android.launcher3.taskbar.TaskbarViewController.ALPHA_INDEX_LAUNCHER_STATE;
+
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.graphics.Rect;
-import android.graphics.RectF;
 import android.view.MotionEvent;
 
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
 import com.android.launcher3.BaseQuickstepLauncher;
-import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.QuickstepTransitionManager;
 import com.android.launcher3.R;
-import com.android.launcher3.Utilities;
+import com.android.launcher3.anim.AnimatorListeners;
 import com.android.launcher3.anim.PendingAnimation;
-import com.android.launcher3.states.StateAnimationConfig;
+import com.android.launcher3.util.MultiValueAlpha;
+import com.android.launcher3.util.MultiValueAlpha.AlphaProperty;
+import com.android.quickstep.AnimatedFloat;
 
 
 /**
  * A data source which integrates with a Launcher instance
- * TODO: Rename to have Launcher prefix
  */
-
 public class LauncherTaskbarUIController extends TaskbarUIController {
 
     private final BaseQuickstepLauncher mLauncher;
     private final TaskbarStateHandler mTaskbarStateHandler;
-    private final TaskbarAnimationController mTaskbarAnimationController;
     private final TaskbarHotseatController mHotseatController;
 
     private final TaskbarActivityContext mContext;
     final TaskbarDragLayer mTaskbarDragLayer;
     final TaskbarView mTaskbarView;
 
+    private AnimatedFloat mTaskbarBackgroundAlpha;
+    private AlphaProperty mIconAlphaForHome;
     private @Nullable Animator mAnimator;
     private boolean mIsAnimatingToLauncher;
 
@@ -60,19 +64,22 @@
 
         mLauncher = launcher;
         mTaskbarStateHandler = mLauncher.getTaskbarStateHandler();
-        mTaskbarAnimationController = new TaskbarAnimationController(mLauncher,
-                createTaskbarAnimationControllerCallbacks());
         mHotseatController = new TaskbarHotseatController(
                 mLauncher, mTaskbarView::updateHotseatItems);
+
     }
 
     @Override
-    protected void onCreate() {
-        mTaskbarStateHandler.setAnimationController(mTaskbarAnimationController);
-        mTaskbarAnimationController.init();
+    protected void init(TaskbarControllers taskbarControllers) {
+        mTaskbarBackgroundAlpha = taskbarControllers.taskbarDragLayerController
+                .getTaskbarBackgroundAlpha();
+        MultiValueAlpha taskbarIconAlpha = taskbarControllers.taskbarViewController
+                .getTaskbarIconAlpha();
+        mIconAlphaForHome = taskbarIconAlpha.getProperty(ALPHA_INDEX_HOME);
+        mTaskbarStateHandler.setAnimationController(taskbarIconAlpha.getProperty(
+                ALPHA_INDEX_LAUNCHER_STATE));
         mHotseatController.init();
         setTaskbarViewVisible(!mLauncher.hasBeenResumed());
-        alignRealHotseatWithTaskbar();
         mLauncher.setTaskbarUIController(this);
     }
 
@@ -83,7 +90,6 @@
             mAnimator.end();
         }
         mTaskbarStateHandler.setAnimationController(null);
-        mTaskbarAnimationController.cleanup();
         mHotseatController.cleanup();
         setTaskbarViewVisible(true);
         mLauncher.getHotseat().setIconsAlpha(1f);
@@ -95,41 +101,16 @@
         return !mIsAnimatingToLauncher;
     }
 
-    private TaskbarAnimationControllerCallbacks createTaskbarAnimationControllerCallbacks() {
-        return new TaskbarAnimationControllerCallbacks() {
-            @Override
-            public void updateTaskbarBackgroundAlpha(float alpha) {
-                mTaskbarDragLayer.setTaskbarBackgroundAlpha(alpha);
-            }
-
-            @Override
-            public void updateTaskbarVisibilityAlpha(float alpha) {
-                mTaskbarView.setAlpha(alpha);
-            }
-
-            @Override
-            public void updateImeBarVisibilityAlpha(float alpha) {
-                mTaskbarDragLayer.updateImeBarVisibilityAlpha(alpha);
-            }
-
-            @Override
-            public void updateTaskbarScale(float scale) {
-                mTaskbarView.setScaleX(scale);
-                mTaskbarView.setScaleY(scale);
-            }
-
-            @Override
-            public void updateTaskbarTranslationY(float translationY) {
-                if (translationY < 0) {
-                    // Resize to accommodate the max translation we'll reach.
-                    mContext.setTaskbarWindowHeight(mContext.getDeviceProfile().taskbarSize
-                            + mLauncher.getHotseat().getTaskbarOffsetY());
-                } else {
-                    mContext.setTaskbarWindowHeight(mContext.getDeviceProfile().taskbarSize);
-                }
-                mTaskbarView.setTranslationY(translationY);
-            }
-        };
+    @Override
+    protected void updateContentInsets(Rect outContentInsets) {
+        // TaskbarDragLayer provides insets to other apps based on contentInsets. These
+        // insets should stay consistent even if we expand TaskbarDragLayer's bounds, e.g.
+        // to show a floating view like Folder. Thus, we set the contentInsets to be where
+        // mTaskbarView is, since its position never changes and insets rather than overlays.
+        outContentInsets.left = mTaskbarView.getLeft();
+        outContentInsets.top = mTaskbarView.getTop();
+        outContentInsets.right = mTaskbarDragLayer.getWidth() - mTaskbarView.getRight();
+        outContentInsets.bottom = mTaskbarDragLayer.getHeight() - mTaskbarView.getBottom();
     }
 
     /**
@@ -141,7 +122,7 @@
             mAnimator.cancel();
         }
         if (isResumed) {
-            mAnimator = createAnimToLauncher(null, duration);
+            mAnimator = createAnimToLauncher(mLauncher.getStateManager().getState(), duration);
         } else {
             mAnimator = createAnimToApp(duration);
         }
@@ -157,20 +138,19 @@
     /**
      * Create Taskbar animation when going from an app to Launcher.
      * @param toState If known, the state we will end up in when reaching Launcher.
+     * TODO: Move this and createAnimToApp to TaskbarStateHandler using the BACKGROUND state
      */
-    public Animator createAnimToLauncher(@Nullable LauncherState toState, long duration) {
+    public Animator createAnimToLauncher(@NonNull LauncherState toState, long duration) {
         PendingAnimation anim = new PendingAnimation(duration);
-        anim.add(mTaskbarAnimationController.createAnimToBackgroundAlpha(0, duration));
-        if (toState != null) {
-            mTaskbarStateHandler.setStateWithAnimation(toState, new StateAnimationConfig(), anim);
-        }
+        mTaskbarStateHandler.setState(toState, anim);
+
+        anim.setFloat(mTaskbarBackgroundAlpha, AnimatedFloat.VALUE, 0, LINEAR);
+        mTaskbarView.alignIconsWithLauncher(mLauncher.getDeviceProfile(), anim);
 
         anim.addListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationStart(Animator animation) {
                 mIsAnimatingToLauncher = true;
-                mTaskbarView.setHolesAllowedInLayout(true);
-                mTaskbarView.updateHotseatItemsVisibility();
             }
 
             @Override
@@ -185,27 +165,17 @@
 
     private Animator createAnimToApp(long duration) {
         PendingAnimation anim = new PendingAnimation(duration);
-        anim.add(mTaskbarAnimationController.createAnimToBackgroundAlpha(1, duration));
+        anim.setFloat(mTaskbarBackgroundAlpha, AnimatedFloat.VALUE, 1, LINEAR);
+        anim.addListener(AnimatorListeners.forEndCallback(mTaskbarView.resetIconPosition(anim)));
         anim.addListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationStart(Animator animation) {
-                mTaskbarView.updateHotseatItemsVisibility();
                 setTaskbarViewVisible(true);
             }
-
-            @Override
-            public void onAnimationEnd(Animator animation) {
-                mTaskbarView.setHolesAllowedInLayout(false);
-            }
         });
         return anim.buildAnim();
     }
 
-    @Override
-    protected void onImeVisible(TaskbarDragLayer containerView, boolean isVisible) {
-        mTaskbarAnimationController.animateToVisibilityForIme(isVisible ? 0 : 1);
-    }
-
     /**
      * Should be called when one or more items in the Hotseat have changed.
      */
@@ -222,54 +192,11 @@
     }
 
     public boolean isDraggingItem() {
-        return mTaskbarView.isDraggingItem();
-    }
-
-    /**
-     * Pads the Hotseat to line up exactly with Taskbar's copy of the Hotseat.
-     */
-    @Override
-    public void alignRealHotseatWithTaskbar() {
-        Rect hotseatBounds = new Rect();
-        DeviceProfile grid = mLauncher.getDeviceProfile();
-        int hotseatHeight = grid.workspacePadding.bottom + grid.taskbarSize;
-        int taskbarOffset = mLauncher.getHotseat().getTaskbarOffsetY();
-        int hotseatTopDiff = hotseatHeight - grid.taskbarSize - taskbarOffset;
-        int hotseatBottomDiff = taskbarOffset;
-
-        RectF hotseatBoundsF = mTaskbarView.getHotseatBounds();
-        Utilities.scaleRectFAboutPivot(hotseatBoundsF, getTaskbarScaleOnHome(),
-                mTaskbarView.getPivotX(), mTaskbarView.getPivotY());
-        hotseatBoundsF.round(hotseatBounds);
-        mLauncher.getHotseat().setPadding(hotseatBounds.left,
-                hotseatBounds.top + hotseatTopDiff,
-                mTaskbarView.getWidth() - hotseatBounds.right,
-                mTaskbarView.getHeight() - hotseatBounds.bottom + hotseatBottomDiff);
-    }
-
-    /**
-     * Returns the ratio of the taskbar icon size on home vs in an app.
-     */
-    public float getTaskbarScaleOnHome() {
-        DeviceProfile inAppDp = mContext.getDeviceProfile();
-        DeviceProfile onHomeDp = mLauncher.getDeviceProfile();
-        return (float) onHomeDp.cellWidthPx / inAppDp.cellWidthPx;
+        return mContext.getDragController().isDragging();
     }
 
     void setTaskbarViewVisible(boolean isVisible) {
-        mTaskbarView.setIconsVisibility(isVisible);
+        mIconAlphaForHome.setValue(isVisible ? 1 : 0);
         mLauncher.getHotseat().setIconsAlpha(isVisible ? 0f : 1f);
     }
-
-    /**
-     * Contains methods that TaskbarAnimationController can call to interface with
-     * TaskbarController.
-     */
-    protected interface TaskbarAnimationControllerCallbacks {
-        void updateTaskbarBackgroundAlpha(float alpha);
-        void updateTaskbarVisibilityAlpha(float alpha);
-        void updateImeBarVisibilityAlpha(float alpha);
-        void updateTaskbarScale(float scale);
-        void updateTaskbarTranslationY(float translationY);
-    }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/NavbarButtonsViewController.java b/quickstep/src/com/android/launcher3/taskbar/NavbarButtonsViewController.java
new file mode 100644
index 0000000..2ae7d10
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/NavbarButtonsViewController.java
@@ -0,0 +1,351 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.taskbar;
+
+import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_A11Y;
+import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_A11Y_LONG_CLICK;
+import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_BACK;
+import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_HOME;
+import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_IME_SWITCH;
+import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_RECENTS;
+import static com.android.launcher3.taskbar.TaskbarViewController.ALPHA_INDEX_IME;
+import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_A11Y_BUTTON_CLICKABLE;
+import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_A11Y_BUTTON_LONG_CLICKABLE;
+import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_IME_SHOWING;
+import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_IME_SWITCHER_SHOWING;
+
+import android.animation.ObjectAnimator;
+import android.annotation.DrawableRes;
+import android.graphics.Rect;
+import android.graphics.Region;
+import android.graphics.Region.Op;
+import android.graphics.drawable.AnimatedVectorDrawable;
+import android.util.Property;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.View.OnHoverListener;
+import android.view.ViewGroup;
+import android.widget.FrameLayout;
+import android.widget.ImageView;
+
+import com.android.launcher3.LauncherAnimUtils;
+import com.android.launcher3.R;
+import com.android.launcher3.Utilities;
+import com.android.launcher3.anim.AlphaUpdateListener;
+import com.android.launcher3.taskbar.TaskbarNavButtonController.TaskbarButton;
+import com.android.launcher3.taskbar.contextual.RotationButton;
+import com.android.launcher3.taskbar.contextual.RotationButtonController;
+import com.android.launcher3.util.MultiValueAlpha;
+import com.android.quickstep.AnimatedFloat;
+
+import java.util.ArrayList;
+import java.util.function.IntPredicate;
+
+/**
+ * Controller for managing nav bar buttons in taskbar
+ */
+public class NavbarButtonsViewController {
+
+    private final Rect mTempRect = new Rect();
+
+    private static final int FLAG_SWITCHER_SUPPORTED = 1 << 0;
+    private static final int FLAG_IME_VISIBLE = 1 << 1;
+    private static final int FLAG_ROTATION_BUTTON_VISIBLE = 1 << 2;
+    private static final int FLAG_A11Y_VISIBLE = 1 << 3;
+
+    private static final int MASK_IME_SWITCHER_VISIBLE = FLAG_SWITCHER_SUPPORTED | FLAG_IME_VISIBLE;
+
+    private View.OnLongClickListener mA11yLongClickListener;
+    private final ArrayList<StatePropertyHolder> mPropertyHolders = new ArrayList<>();
+    private final ArrayList<View> mAllButtons = new ArrayList<>();
+    private int mState;
+
+    private final TaskbarActivityContext mContext;
+    private final FrameLayout mNavButtonsView;
+    private final ViewGroup mStartContainer;
+    private final ViewGroup mEndContainer;
+
+    // Initialized in init.
+    private TaskbarControllers mControllers;
+    private View mA11yButton;
+    private int mSysuiStateFlags;
+
+    public NavbarButtonsViewController(TaskbarActivityContext context, FrameLayout navButtonsView) {
+        mContext = context;
+        mNavButtonsView = navButtonsView;
+        mStartContainer = mNavButtonsView.findViewById(R.id.start_nav_buttons);
+        mEndContainer = mNavButtonsView.findViewById(R.id.end_nav_buttons);
+    }
+
+    /**
+     * Initializes the controller
+     */
+    public void init(TaskbarControllers controllers) {
+        mControllers = controllers;
+        mNavButtonsView.getLayoutParams().height = mContext.getDeviceProfile().taskbarSize;
+
+        mA11yLongClickListener = view -> {
+            mControllers.navButtonController.onButtonClick(BUTTON_A11Y_LONG_CLICK);
+            return true;
+        };
+
+        if (mContext.canShowNavButtons()) {
+            initButtons(mStartContainer, mEndContainer, mControllers.navButtonController);
+
+            // Animate taskbar background when IME shows
+            mPropertyHolders.add(new StatePropertyHolder(
+                    mControllers.taskbarDragLayerController.getNavbarBackgroundAlpha(),
+                    flags -> (flags & FLAG_IME_VISIBLE) == 0,
+                    AnimatedFloat.VALUE, 0, 1));
+            mPropertyHolders.add(new StatePropertyHolder(
+                    mControllers.taskbarViewController.getTaskbarIconAlpha()
+                            .getProperty(ALPHA_INDEX_IME),
+                    flags -> (flags & FLAG_IME_VISIBLE) == 0, MultiValueAlpha.VALUE, 1, 0));
+
+            // Rotation button
+            RotationButton rotationButton = new RotationButtonImpl(addButton(mEndContainer));
+            rotationButton.hide();
+            mControllers.rotationButtonController.setRotationButton(rotationButton);
+        } else {
+            mControllers.rotationButtonController.setRotationButton(new RotationButton() {});
+        }
+
+        applyState();
+        mPropertyHolders.forEach(StatePropertyHolder::endAnimation);
+    }
+
+    private void initButtons(ViewGroup startContainer, ViewGroup endContainer,
+            TaskbarNavButtonController navButtonController) {
+
+        View backButton = addButton(R.drawable.ic_sysbar_back, BUTTON_BACK,
+                startContainer, navButtonController);
+        // Rotate when Ime visible
+        mPropertyHolders.add(new StatePropertyHolder(backButton,
+                flags -> (flags & FLAG_IME_VISIBLE) == 0, View.ROTATION, 0,
+                Utilities.isRtl(mContext.getResources()) ? 90 : -90));
+
+        // home and recents buttons
+        View homeButton = addButton(R.drawable.ic_sysbar_home, BUTTON_HOME, startContainer,
+                navButtonController);
+        mPropertyHolders.add(new StatePropertyHolder(homeButton,
+                flags -> (flags & FLAG_IME_VISIBLE) == 0));
+        View recentsButton = addButton(R.drawable.ic_sysbar_recent, BUTTON_RECENTS,
+                startContainer, navButtonController);
+        mPropertyHolders.add(new StatePropertyHolder(recentsButton,
+                flags -> (flags & FLAG_IME_VISIBLE) == 0));
+
+        // IME switcher
+        View imeSwitcherButton = addButton(R.drawable.ic_ime_switcher, BUTTON_IME_SWITCH,
+                endContainer, navButtonController);
+        mPropertyHolders.add(new StatePropertyHolder(imeSwitcherButton,
+                flags -> ((flags & MASK_IME_SWITCHER_VISIBLE) == MASK_IME_SWITCHER_VISIBLE)
+                        && ((flags & FLAG_ROTATION_BUTTON_VISIBLE) == 0)
+                        && ((flags & FLAG_A11Y_VISIBLE) == 0)));
+
+        // A11y button
+        mA11yButton = addButton(R.drawable.ic_sysbar_accessibility_button, BUTTON_A11Y,
+                endContainer, navButtonController);
+        mPropertyHolders.add(new StatePropertyHolder(mA11yButton,
+                flags -> (flags & FLAG_A11Y_VISIBLE) != 0
+                        && (flags & FLAG_ROTATION_BUTTON_VISIBLE) == 0));
+        mA11yButton.setOnLongClickListener(mA11yLongClickListener);
+    }
+
+    public void updateStateForSysuiFlags(int systemUiStateFlags, boolean forceUpdate) {
+        boolean isImeVisible = (systemUiStateFlags & SYSUI_STATE_IME_SHOWING) != 0;
+        boolean isImeSwitcherShowing = (systemUiStateFlags & SYSUI_STATE_IME_SWITCHER_SHOWING) != 0;
+        boolean a11yVisible = (systemUiStateFlags & SYSUI_STATE_A11Y_BUTTON_CLICKABLE) != 0;
+        boolean a11yLongClickable =
+                (systemUiStateFlags & SYSUI_STATE_A11Y_BUTTON_LONG_CLICKABLE) != 0;
+
+        if (!forceUpdate && systemUiStateFlags == mSysuiStateFlags) {
+            return;
+        }
+        mSysuiStateFlags = systemUiStateFlags;
+
+        updateStateForFlag(FLAG_IME_VISIBLE, isImeVisible);
+        updateStateForFlag(FLAG_SWITCHER_SUPPORTED, isImeSwitcherShowing);
+        updateStateForFlag(FLAG_A11Y_VISIBLE, a11yVisible);
+        mA11yButton.setLongClickable(a11yLongClickable);
+        applyState();
+    }
+
+    /**
+     * Returns true if IME bar is visible
+     */
+    public boolean isImeVisible() {
+        return (mState & FLAG_IME_VISIBLE) != 0;
+    }
+
+    /**
+     * Adds the bounds corresponding to all visible buttons to provided region
+     */
+    public void addVisibleButtonsRegion(TaskbarDragLayer parent, Region outRegion) {
+        int count = mAllButtons.size();
+        for (int i = 0; i < count; i++) {
+            View button = mAllButtons.get(i);
+            if (button.getVisibility() == View.VISIBLE) {
+                parent.getDescendantRectRelativeToSelf(button, mTempRect);
+                outRegion.op(mTempRect, Op.UNION);
+            }
+        }
+    }
+
+    /**
+     * Does not call {@link #applyState()}. Don't forget to!
+     */
+    private void updateStateForFlag(int flag, boolean enabled) {
+        if (enabled) {
+            mState |= flag;
+        } else {
+            mState &= ~flag;
+        }
+    }
+
+    private void applyState() {
+        int count = mPropertyHolders.size();
+        for (int i = 0; i < count; i++) {
+            mPropertyHolders.get(i).setState(mState);
+        }
+    }
+
+    private ImageView addButton(@DrawableRes int drawableId, @TaskbarButton int buttonType,
+            ViewGroup parent, TaskbarNavButtonController navButtonController) {
+        ImageView buttonView = addButton(parent);
+        buttonView.setImageResource(drawableId);
+        buttonView.setOnClickListener(view -> navButtonController.onButtonClick(buttonType));
+        return buttonView;
+    }
+
+    private ImageView addButton(ViewGroup parent) {
+        ImageView buttonView = (ImageView) mContext.getLayoutInflater()
+                .inflate(R.layout.taskbar_nav_button, parent, false);
+        parent.addView(buttonView);
+        mAllButtons.add(buttonView);
+        return buttonView;
+    }
+
+    private class RotationButtonImpl implements RotationButton {
+
+        private final ImageView mButton;
+        private AnimatedVectorDrawable mImageDrawable;
+
+        RotationButtonImpl(ImageView button) {
+            mButton = button;
+        }
+
+        @Override
+        public void setRotationButtonController(RotationButtonController rotationButtonController) {
+            // TODO(b/187754252) UI polish, different icons based on light/dark context, etc
+            mImageDrawable = (AnimatedVectorDrawable) mButton.getContext()
+                    .getDrawable(rotationButtonController.getIconResId());
+            mButton.setImageDrawable(mImageDrawable);
+            mImageDrawable.setCallback(mButton);
+        }
+
+        @Override
+        public View getCurrentView() {
+            return mButton;
+        }
+
+        @Override
+        public void show() {
+            mButton.setVisibility(View.VISIBLE);
+            mState |= FLAG_ROTATION_BUTTON_VISIBLE;
+            applyState();
+        }
+
+        @Override
+        public void hide() {
+            mButton.setVisibility(View.GONE);
+            mState &= ~FLAG_ROTATION_BUTTON_VISIBLE;
+            applyState();
+        }
+
+        @Override
+        public boolean isVisible() {
+            return mButton.getVisibility() == View.VISIBLE;
+        }
+
+        @Override
+        public void updateIcon(int lightIconColor, int darkIconColor) {
+            // TODO(b/187754252): UI Polish
+        }
+
+        @Override
+        public void setOnClickListener(OnClickListener onClickListener) {
+            mButton.setOnClickListener(onClickListener);
+        }
+
+        @Override
+        public void setOnHoverListener(OnHoverListener onHoverListener) {
+            mButton.setOnHoverListener(onHoverListener);
+        }
+
+        @Override
+        public AnimatedVectorDrawable getImageDrawable() {
+            return mImageDrawable;
+        }
+
+        @Override
+        public void setDarkIntensity(float darkIntensity) {
+            // TODO(b/187754252) UI polish
+        }
+
+        @Override
+        public boolean acceptRotationProposal() {
+            return mButton.isAttachedToWindow();
+        }
+    }
+
+    private static class StatePropertyHolder {
+
+        private final float mEnabledValue, mDisabledValue;
+        private final ObjectAnimator mAnimator;
+        private final IntPredicate mEnableCondition;
+
+        private boolean mIsEnabled = true;
+
+        StatePropertyHolder(View view, IntPredicate enableCondition) {
+            this(view, enableCondition, LauncherAnimUtils.VIEW_ALPHA, 1, 0);
+            mAnimator.addListener(new AlphaUpdateListener(view));
+        }
+
+        <T> StatePropertyHolder(T target, IntPredicate enabledCondition,
+                Property<T, Float> property, float enabledValue, float disabledValue) {
+            mEnableCondition = enabledCondition;
+            mEnabledValue = enabledValue;
+            mDisabledValue = disabledValue;
+            mAnimator = ObjectAnimator.ofFloat(target, property, enabledValue, disabledValue);
+        }
+
+        public void setState(int flags) {
+            boolean isEnabled = mEnableCondition.test(flags);
+            if (mIsEnabled != isEnabled) {
+                mIsEnabled = isEnabled;
+                mAnimator.cancel();
+                mAnimator.setFloatValues(mIsEnabled ? mEnabledValue : mDisabledValue);
+                mAnimator.start();
+            }
+        }
+
+        public void endAnimation() {
+            if (mAnimator.isRunning()) {
+                mAnimator.end();
+            }
+        }
+    }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
index 4ba0ee0..aaf0d3f 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -28,9 +28,7 @@
 import android.content.Intent;
 import android.content.pm.LauncherApps;
 import android.graphics.PixelFormat;
-import android.graphics.Point;
 import android.graphics.Rect;
-import android.graphics.drawable.Drawable;
 import android.os.Process;
 import android.os.SystemProperties;
 import android.util.Log;
@@ -40,31 +38,25 @@
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.WindowManager;
+import android.widget.FrameLayout;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
 
 import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.DeviceProfile;
-import com.android.launcher3.DragSource;
-import com.android.launcher3.DropTarget;
 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.R;
-import com.android.launcher3.dragndrop.DragController;
-import com.android.launcher3.dragndrop.DragOptions;
-import com.android.launcher3.dragndrop.DragView;
-import com.android.launcher3.dragndrop.DraggableView;
 import com.android.launcher3.folder.Folder;
 import com.android.launcher3.folder.FolderIcon;
 import com.android.launcher3.model.data.FolderInfo;
-import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
-import com.android.launcher3.taskbar.TaskbarNavButtonController.TaskbarButton;
+import com.android.launcher3.taskbar.contextual.RotationButtonController;
 import com.android.launcher3.touch.ItemClickHandler;
 import com.android.launcher3.util.PackageManagerHelper;
 import com.android.launcher3.util.Themes;
 import com.android.launcher3.util.TraceHelper;
+import com.android.launcher3.util.ViewCache;
 import com.android.launcher3.views.ActivityContext;
 import com.android.quickstep.SysUINavigationMode;
 import com.android.quickstep.SysUINavigationMode.Mode;
@@ -88,45 +80,50 @@
     private final DeviceProfile mDeviceProfile;
     private final LayoutInflater mLayoutInflater;
     private final TaskbarDragLayer mDragLayer;
-    private final TaskbarIconController mIconController;
-    private final MyDragController mDragController;
+    private final TaskbarControllers mControllers;
 
     private final WindowManager mWindowManager;
     private WindowManager.LayoutParams mWindowLayoutParams;
+    private boolean mIsFullscreen;
+    // The size we should return to when we call setTaskbarWindowFullscreen(false)
+    private int mLastRequestedNonFullscreenHeight;
 
     private final SysUINavigationMode.Mode mNavMode;
-    private final TaskbarNavButtonController mNavButtonController;
+    private final ViewCache mViewCache = new ViewCache();
 
     private final boolean mIsSafeModeEnabled;
 
-    @NonNull
-    private TaskbarUIController mUIController = TaskbarUIController.DEFAULT;
-
-    private final View.OnClickListener mOnTaskbarIconClickListener;
-    private final View.OnLongClickListener mOnTaskbarIconLongClickListener;
-
     public TaskbarActivityContext(Context windowContext, DeviceProfile dp,
             TaskbarNavButtonController buttonController) {
         super(windowContext, Themes.getActivityThemeRes(windowContext));
         mDeviceProfile = dp;
-        mNavButtonController = buttonController;
+
         mNavMode = SysUINavigationMode.getMode(windowContext);
         mIsSafeModeEnabled = TraceHelper.allowIpcs("isSafeMode",
                 () -> getPackageManager().isSafeMode());
 
-        mOnTaskbarIconLongClickListener =
-                new TaskbarDragController(this)::startSystemDragOnLongClick;
-        mOnTaskbarIconClickListener = this::onTaskbarIconClicked;
-
         float taskbarIconSize = getResources().getDimension(R.dimen.taskbar_icon_size);
+        mDeviceProfile.updateIconSize(1, getResources());
         float iconScale = taskbarIconSize / mDeviceProfile.iconSizePx;
         mDeviceProfile.updateIconSize(iconScale, getResources());
 
         mLayoutInflater = LayoutInflater.from(this).cloneInContext(this);
-        mDragLayer = (TaskbarDragLayer) mLayoutInflater
-                .inflate(R.layout.taskbar, null, false);
-        mIconController = new TaskbarIconController(this, mDragLayer);
-        mDragController = new MyDragController(this);
+
+        // Inflate views.
+        mDragLayer = (TaskbarDragLayer) mLayoutInflater.inflate(
+                R.layout.taskbar, null, false);
+        TaskbarView taskbarView = mDragLayer.findViewById(R.id.taskbar_view);
+        FrameLayout navButtonsView = mDragLayer.findViewById(R.id.navbuttons_view);
+
+        // Construct controllers.
+        mControllers = new TaskbarControllers(this,
+                new TaskbarDragController(this),
+                buttonController,
+                new NavbarButtonsViewController(this, navButtonsView),
+                new RotationButtonController(this, R.color.popup_color_primary_light,
+                        R.color.popup_color_primary_light),
+                new TaskbarDragLayerController(this, mDragLayer),
+                new TaskbarViewController(this, taskbarView));
 
         Display display = windowContext.getDisplay();
         Context c = display.getDisplayId() == Display.DEFAULT_DISPLAY
@@ -136,9 +133,10 @@
     }
 
     public void init() {
+        mLastRequestedNonFullscreenHeight = mDeviceProfile.taskbarSize;
         mWindowLayoutParams = new WindowManager.LayoutParams(
                 MATCH_PARENT,
-                mDeviceProfile.taskbarSize,
+                mLastRequestedNonFullscreenHeight,
                 TYPE_APPLICATION_OVERLAY,
                 WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
                 PixelFormat.TRANSLUCENT);
@@ -156,19 +154,10 @@
                 new int[] { ITYPE_EXTRA_NAVIGATION_BAR, ITYPE_BOTTOM_TAPPABLE_ELEMENT }
         );
 
-        mIconController.init(mOnTaskbarIconClickListener, mOnTaskbarIconLongClickListener);
-        mWindowManager.addView(mDragLayer, mWindowLayoutParams);
-    }
+        // Initialize controllers after all are constructed.
+        mControllers.init();
 
-    /**
-     * Updates the TaskbarContainer height (pass deviceProfile.taskbarSize to reset).
-     */
-    public void setTaskbarWindowHeight(int height) {
-        if (mWindowLayoutParams.height == height) {
-            return;
-        }
-        mWindowLayoutParams.height = height;
-        mWindowManager.updateViewLayout(mDragLayer, mWindowLayoutParams);
+        mWindowManager.addView(mDragLayer, mWindowLayoutParams);
     }
 
     public boolean canShowNavButtons() {
@@ -192,22 +181,26 @@
 
     @Override
     public Rect getFolderBoundingBox() {
-        return mDragLayer.getFolderBoundingBox();
+        return mControllers.taskbarDragLayerController.getFolderBoundingBox();
     }
 
     @Override
-    public DragController getDragController() {
-        return mDragController;
+    public TaskbarDragController getDragController() {
+        return mControllers.taskbarDragController;
+    }
+
+    @Override
+    public ViewCache getViewCache() {
+        return mViewCache;
     }
 
     /**
      * Sets a new data-source for this taskbar instance
      */
     public void setUIController(@NonNull TaskbarUIController uiController) {
-        mUIController.onDestroy();
-        mUIController = uiController;
-        mIconController.setUIController(mUIController);
-        mUIController.onCreate();
+        mControllers.uiController.onDestroy();
+        mControllers.uiController = uiController;
+        mControllers.uiController.init(mControllers);
     }
 
     /**
@@ -215,36 +208,62 @@
      */
     public void onDestroy() {
         setUIController(TaskbarUIController.DEFAULT);
-        mIconController.onDestroy();
+        mControllers.onDestroy();
         mWindowManager.removeViewImmediate(mDragLayer);
     }
 
-    void onNavigationButtonClick(@TaskbarButton int buttonType) {
-        mNavButtonController.onButtonClick(buttonType);
+    public void updateSysuiStateFlags(int systemUiStateFlags, boolean forceUpdate) {
+        if (!canShowNavButtons()) {
+            return;
+        }
+        mControllers.navbarButtonsViewController.updateStateForSysuiFlags(
+                systemUiStateFlags, forceUpdate);
+        mControllers.taskbarViewController.setImeIsVisible(
+                mControllers.navbarButtonsViewController.isImeVisible());
     }
 
-    /**
-     * Should be called when the IME visibility changes, so we can hide/show Taskbar accordingly.
-     */
-    public void setImeIsVisible(boolean isImeVisible) {
-        mIconController.setImeIsVisible(isImeVisible);
+    public void onRotationProposal(int rotation, boolean isValid) {
+        mControllers.rotationButtonController.onRotationProposal(rotation, isValid);
     }
 
-    /**
-     * When in 3 button nav, the above doesn't get called since we prevent sysui nav bar from
-     * instantiating at all, which is what's responsible for sending sysui state flags over.
-     *
-     * @param vis IME visibility flag
-     */
-    public void updateImeStatus(int displayId, int vis, boolean showImeSwitcher) {
-        mIconController.updateImeStatus(displayId, vis, showImeSwitcher);
+    public void disable(int displayId, int state1, int state2, boolean animate) {
+        if (displayId != getDisplayId()) {
+            return;
+        }
+        mControllers.rotationButtonController.onDisable2FlagChanged(state2);
+    }
+
+    public void onSystemBarAttributesChanged(int displayId, int behavior) {
+        mControllers.rotationButtonController.onBehaviorChanged(displayId, behavior);
     }
 
     /**
      * Updates the TaskbarContainer to MATCH_PARENT vs original Taskbar size.
      */
-    protected void setTaskbarWindowFullscreen(boolean fullscreen) {
-        setTaskbarWindowHeight(fullscreen ? MATCH_PARENT : getDeviceProfile().taskbarSize);
+    public void setTaskbarWindowFullscreen(boolean fullscreen) {
+        mIsFullscreen = fullscreen;
+        setTaskbarWindowHeight(fullscreen ? MATCH_PARENT : mLastRequestedNonFullscreenHeight);
+    }
+
+    /**
+     * Updates the TaskbarContainer height (pass deviceProfile.taskbarSize to reset).
+     */
+    public void setTaskbarWindowHeight(int height) {
+        if (mWindowLayoutParams.height == height) {
+            return;
+        }
+        if (height != MATCH_PARENT) {
+            mLastRequestedNonFullscreenHeight = height;
+            if (mIsFullscreen) {
+                // We still need to be fullscreen, so defer any change to our height until we call
+                // setTaskbarWindowFullscreen(false). For example, this could happen when dragging
+                // from the gesture region, as the drag will cancel the gesture and reset launcher's
+                // state, which in turn normally would reset the taskbar window height as well.
+                return;
+            }
+        }
+        mWindowLayoutParams.height = height;
+        mWindowManager.updateViewLayout(mDragLayer, mWindowLayoutParams);
     }
 
     protected void onTaskbarIconClicked(View view) {
@@ -262,8 +281,8 @@
                 folder.animateOpen();
 
                 folder.iterateOverItems((itemInfo, itemView) -> {
-                    itemView.setOnClickListener(mOnTaskbarIconClickListener);
-                    itemView.setOnLongClickListener(mOnTaskbarIconLongClickListener);
+                    mControllers.taskbarViewController
+                            .setClickAndLongClickListenersForIcon(itemView);
                     // To play haptic when dragging, like other Taskbar items do.
                     itemView.setHapticFeedbackEnabled(true);
                     return false;
@@ -271,7 +290,9 @@
             });
         } else if (tag instanceof WorkspaceItemInfo) {
             WorkspaceItemInfo info = (WorkspaceItemInfo) tag;
-            if (!(info.isDisabled() && ItemClickHandler.handleDisabledItemClicked(info, this))) {
+            if (info.isDisabled()) {
+                ItemClickHandler.handleDisabledItemClicked(info, this);
+            } else {
                 Intent intent = new Intent(info.getIntent())
                         .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                 try {
@@ -307,27 +328,4 @@
 
         AbstractFloatingView.closeAllOpenViews(this);
     }
-
-    private static class MyDragController extends DragController<TaskbarActivityContext> {
-        MyDragController(TaskbarActivityContext activity) {
-            super(activity);
-        }
-
-        @Override
-        protected DragView startDrag(@Nullable Drawable drawable, @Nullable View view,
-                DraggableView originalView, int dragLayerX, int dragLayerY, DragSource source,
-                ItemInfo dragInfo, Point dragOffset, Rect dragRegion, float initialDragViewScale,
-                float dragViewScaleOnDrop, DragOptions options) {
-            return null;
-        }
-
-        @Override
-        protected void exitDrag() {
-        }
-
-        @Override
-        protected DropTarget getDefaultDropTarget(int[] dropCoordinates) {
-            return null;
-        }
-    }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarAnimationController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarAnimationController.java
deleted file mode 100644
index e20ddf8..0000000
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarAnimationController.java
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- * Copyright (C) 2021 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.android.launcher3.taskbar;
-
-import static com.android.launcher3.LauncherState.TASKBAR;
-
-import android.animation.Animator;
-
-import com.android.launcher3.BaseQuickstepLauncher;
-import com.android.launcher3.Utilities;
-import com.android.launcher3.taskbar.LauncherTaskbarUIController.TaskbarAnimationControllerCallbacks;
-import com.android.quickstep.AnimatedFloat;
-import com.android.quickstep.SystemUiProxy;
-import com.android.systemui.shared.system.QuickStepContract;
-
-/**
- * Works with TaskbarController to update the TaskbarView's visual properties based on factors such
- * as LauncherState, whether Launcher is in the foreground, etc.
- */
-public class TaskbarAnimationController {
-
-    private static final long IME_VISIBILITY_ALPHA_DURATION = 120;
-
-    private final BaseQuickstepLauncher mLauncher;
-    private final TaskbarAnimationControllerCallbacks mTaskbarCallbacks;
-
-    // Background alpha.
-    private final AnimatedFloat mTaskbarBackgroundAlpha = new AnimatedFloat(
-            this::onTaskbarBackgroundAlphaChanged);
-
-    // Overall visibility.
-    private final AnimatedFloat mTaskbarVisibilityAlphaForLauncherState = new AnimatedFloat(
-            this::updateVisibilityAlpha);
-    private final AnimatedFloat mTaskbarVisibilityAlphaForIme = new AnimatedFloat(
-            this::updateVisibilityAlphaForIme);
-
-    // Scale.
-    private final AnimatedFloat mTaskbarScaleForLauncherState = new AnimatedFloat(
-            this::updateScale);
-
-    // TranslationY.
-    private final AnimatedFloat mTaskbarTranslationYForLauncherState = new AnimatedFloat(
-            this::updateTranslationY);
-
-    public TaskbarAnimationController(BaseQuickstepLauncher launcher,
-            TaskbarAnimationControllerCallbacks taskbarCallbacks) {
-        mLauncher = launcher;
-        mTaskbarCallbacks = taskbarCallbacks;
-    }
-
-    protected void init() {
-        mTaskbarBackgroundAlpha.updateValue(mLauncher.hasBeenResumed() ? 0f : 1f);
-        boolean isVisibleForLauncherState = (mLauncher.getStateManager().getState()
-                .getVisibleElements(mLauncher) & TASKBAR) != 0;
-        mTaskbarVisibilityAlphaForLauncherState.updateValue(isVisibleForLauncherState ? 1f : 0f);
-        boolean isImeVisible = (SystemUiProxy.INSTANCE.get(mLauncher).getLastSystemUiStateFlags()
-                & QuickStepContract.SYSUI_STATE_IME_SHOWING) != 0;
-        mTaskbarVisibilityAlphaForIme.updateValue(isImeVisible ? 0f : 1f);
-
-        onTaskbarBackgroundAlphaChanged();
-        updateVisibilityAlpha();
-    }
-
-    protected void cleanup() {
-        setNavBarButtonAlpha(1f);
-    }
-
-    protected AnimatedFloat getTaskbarVisibilityForLauncherState() {
-        return mTaskbarVisibilityAlphaForLauncherState;
-    }
-
-    protected AnimatedFloat getTaskbarScaleForLauncherState() {
-        return mTaskbarScaleForLauncherState;
-    }
-
-    protected AnimatedFloat getTaskbarTranslationYForLauncherState() {
-        return mTaskbarTranslationYForLauncherState;
-    }
-
-    protected Animator createAnimToBackgroundAlpha(float toAlpha, long duration) {
-        return mTaskbarBackgroundAlpha.animateToValue(mTaskbarBackgroundAlpha.value, toAlpha)
-                .setDuration(duration);
-    }
-
-    protected void animateToVisibilityForIme(float toAlpha) {
-        mTaskbarVisibilityAlphaForIme.animateToValue(mTaskbarVisibilityAlphaForIme.value, toAlpha)
-                .setDuration(IME_VISIBILITY_ALPHA_DURATION).start();
-    }
-
-    private void onTaskbarBackgroundAlphaChanged() {
-        mTaskbarCallbacks.updateTaskbarBackgroundAlpha(mTaskbarBackgroundAlpha.value);
-        updateVisibilityAlpha();
-        updateScale();
-        updateTranslationY();
-    }
-
-    private void updateVisibilityAlpha() {
-        // We use mTaskbarBackgroundAlpha as a proxy for whether Launcher is resumed/paused, the
-        // assumption being that Taskbar should always be visible regardless of the current
-        // LauncherState if Launcher is paused.
-        float alphaDueToIme = mTaskbarVisibilityAlphaForIme.value;
-        float alphaDueToLauncher = Math.max(mTaskbarBackgroundAlpha.value,
-                mTaskbarVisibilityAlphaForLauncherState.value);
-        float taskbarAlpha = alphaDueToLauncher * alphaDueToIme;
-        mTaskbarCallbacks.updateTaskbarVisibilityAlpha(taskbarAlpha);
-
-        // Make the nav bar invisible if taskbar is visible.
-        setNavBarButtonAlpha(1f - taskbarAlpha);
-    }
-
-    private void updateVisibilityAlphaForIme() {
-        updateVisibilityAlpha();
-        float taskbarAlphaDueToIme = mTaskbarVisibilityAlphaForIme.value;
-        mTaskbarCallbacks.updateImeBarVisibilityAlpha(1f - taskbarAlphaDueToIme);
-    }
-
-    private void updateScale() {
-        // We use mTaskbarBackgroundAlpha as a proxy for whether Launcher is resumed/paused, the
-        // assumption being that Taskbar should always be at scale 1f regardless of the current
-        // LauncherState if Launcher is paused.
-        float scale = mTaskbarScaleForLauncherState.value;
-        scale = Utilities.mapRange(mTaskbarBackgroundAlpha.value, scale, 1f);
-        mTaskbarCallbacks.updateTaskbarScale(scale);
-    }
-
-    private void updateTranslationY() {
-        // We use mTaskbarBackgroundAlpha as a proxy for whether Launcher is resumed/paused, the
-        // assumption being that Taskbar should always be at translationY 0f regardless of the
-        // current LauncherState if Launcher is paused.
-        float translationY = mTaskbarTranslationYForLauncherState.value;
-        translationY = Utilities.mapRange(mTaskbarBackgroundAlpha.value, translationY, 0f);
-        mTaskbarCallbacks.updateTaskbarTranslationY(translationY);
-    }
-
-    private void setNavBarButtonAlpha(float navBarAlpha) {
-        SystemUiProxy.INSTANCE.get(mLauncher).setNavBarButtonAlpha(navBarAlpha, false);
-    }
-}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
new file mode 100644
index 0000000..7712ffe
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.taskbar;
+
+import androidx.annotation.NonNull;
+
+import com.android.launcher3.taskbar.contextual.RotationButtonController;
+
+/**
+ * Hosts various taskbar controllers to facilitate passing between one another.
+ */
+public class TaskbarControllers {
+
+    public final TaskbarActivityContext taskbarActivityContext;
+    public final TaskbarDragController taskbarDragController;
+    public final TaskbarNavButtonController navButtonController;
+    public final NavbarButtonsViewController navbarButtonsViewController;
+    public final RotationButtonController rotationButtonController;
+    public final TaskbarDragLayerController taskbarDragLayerController;
+    public final TaskbarViewController taskbarViewController;
+
+    /** Do not store this controller, as it may change at runtime. */
+    @NonNull public TaskbarUIController uiController = TaskbarUIController.DEFAULT;
+
+    public TaskbarControllers(TaskbarActivityContext taskbarActivityContext,
+            TaskbarDragController taskbarDragController,
+            TaskbarNavButtonController navButtonController,
+            NavbarButtonsViewController navbarButtonsViewController,
+            RotationButtonController rotationButtonController,
+            TaskbarDragLayerController taskbarDragLayerController,
+            TaskbarViewController taskbarViewController) {
+        this.taskbarActivityContext = taskbarActivityContext;
+        this.taskbarDragController = taskbarDragController;
+        this.navButtonController = navButtonController;
+        this.navbarButtonsViewController = navbarButtonsViewController;
+        this.rotationButtonController = rotationButtonController;
+        this.taskbarDragLayerController = taskbarDragLayerController;
+        this.taskbarViewController = taskbarViewController;
+    }
+
+    /**
+     * Initializes all controllers. Note that controllers can now reference each other through this
+     * TaskbarControllers instance, but should be careful to only access things that were created
+     * in constructors for now, as some controllers may still be waiting for init().
+     */
+    public void init() {
+        navbarButtonsViewController.init(this);
+        if (taskbarActivityContext.canShowNavButtons()) {
+            rotationButtonController.init();
+        }
+        taskbarDragLayerController.init(this);
+        taskbarViewController.init(this);
+    }
+
+    /**
+     * Cleans up all controllers.
+     */
+    public void onDestroy() {
+        uiController.onDestroy();
+        rotationButtonController.onDestroy();
+        taskbarDragLayerController.onDestroy();
+    }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java
index ee44927..67ebc02 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java
@@ -20,19 +20,35 @@
 
 import android.content.ClipData;
 import android.content.ClipDescription;
-import android.content.Context;
 import android.content.Intent;
 import android.content.pm.LauncherApps;
 import android.content.res.Resources;
 import android.graphics.Canvas;
 import android.graphics.Point;
+import android.graphics.Rect;
+import android.graphics.drawable.Drawable;
 import android.os.UserHandle;
 import android.view.DragEvent;
+import android.view.MotionEvent;
 import android.view.View;
 
+import androidx.annotation.Nullable;
+
+import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.BubbleTextView;
+import com.android.launcher3.DragSource;
+import com.android.launcher3.DropTarget;
 import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.R;
+import com.android.launcher3.accessibility.DragViewStateAnnouncer;
+import com.android.launcher3.dragndrop.DragController;
+import com.android.launcher3.dragndrop.DragDriver;
+import com.android.launcher3.dragndrop.DragOptions;
+import com.android.launcher3.dragndrop.DragView;
+import com.android.launcher3.dragndrop.DraggableView;
+import com.android.launcher3.graphics.DragPreviewProvider;
+import com.android.launcher3.icons.FastBitmapDrawable;
+import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
 import com.android.systemui.shared.recents.model.Task;
 import com.android.systemui.shared.system.ClipDescriptionCompat;
@@ -41,14 +57,20 @@
 /**
  * Handles long click on Taskbar items to start a system drag and drop operation.
  */
-public class TaskbarDragController {
+public class TaskbarDragController extends DragController<TaskbarActivityContext>  {
 
-    private final Context mContext;
     private final int mDragIconSize;
+    private final int[] mTempXY = new int[2];
 
-    public TaskbarDragController(Context context) {
-        mContext = context;
-        Resources resources = mContext.getResources();
+    // Where the initial touch was relative to the dragged icon.
+    private int mRegistrationX;
+    private int mRegistrationY;
+
+    private boolean mIsSystemDragInProgress;
+
+    public TaskbarDragController(TaskbarActivityContext activity) {
+        super(activity);
+        Resources resources = mActivity.getResources();
         mDragIconSize = resources.getDimensionPixelSize(R.dimen.taskbar_icon_drag_icon_size);
     }
 
@@ -57,18 +79,146 @@
      * generate the ClipDescription and Intent.
      * @return Whether {@link View#startDragAndDrop} started successfully.
      */
-    protected boolean startSystemDragOnLongClick(View view) {
+    protected boolean startDragOnLongClick(View view) {
         if (!(view instanceof BubbleTextView)) {
             return false;
         }
 
         BubbleTextView btv = (BubbleTextView) view;
-        View.DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(view) {
+
+        mActivity.setTaskbarWindowFullscreen(true);
+        view.post(() -> {
+            startInternalDrag(btv);
+            btv.setVisibility(INVISIBLE);
+        });
+        return true;
+    }
+
+    private void startInternalDrag(BubbleTextView btv) {
+        float iconScale = 1f;
+        Drawable icon = btv.getIcon();
+        if (icon instanceof FastBitmapDrawable) {
+            iconScale = ((FastBitmapDrawable) icon).getAnimatedScale();
+        }
+
+        // Clear the pressed state if necessary
+        btv.clearFocus();
+        btv.setPressed(false);
+        btv.clearPressedBackground();
+
+        final DragPreviewProvider previewProvider = new DragPreviewProvider(btv);
+        final Drawable drawable = previewProvider.createDrawable();
+        final float scale = previewProvider.getScaleAndPosition(drawable, mTempXY);
+        int dragLayerX = mTempXY[0];
+        int dragLayerY = mTempXY[1];
+
+        Rect dragRect = new Rect();
+        btv.getSourceVisualDragBounds(dragRect);
+        dragLayerY += dragRect.top;
+
+        DragOptions dragOptions = new DragOptions();
+        // TODO: open popup/pre-drag
+        // PopupContainerWithArrow popupContainer = PopupContainerWithArrow.showForIcon(view);
+        // if (popupContainer != null) {
+        //     dragOptions.preDragCondition = popupContainer.createPreDragCondition();
+        // }
+
+        startDrag(
+                drawable,
+                /* view = */ null,
+                /* originalView = */ btv,
+                dragLayerX,
+                dragLayerY,
+                (View target, DropTarget.DragObject d, boolean success) -> {} /* DragSource */,
+                (WorkspaceItemInfo) btv.getTag(),
+                /* dragVisualizeOffset = */ null,
+                dragRect,
+                scale * iconScale,
+                scale,
+                dragOptions);
+    }
+
+    @Override
+    protected DragView startDrag(@Nullable Drawable drawable, @Nullable View view,
+            DraggableView originalView, int dragLayerX, int dragLayerY, DragSource source,
+            ItemInfo dragInfo, Point dragOffset, Rect dragRegion, float initialDragViewScale,
+            float dragViewScaleOnDrop, DragOptions options) {
+        mOptions = options;
+
+        mRegistrationX = mMotionDown.x - dragLayerX;
+        mRegistrationY = mMotionDown.y - dragLayerY;
+
+        final int dragRegionLeft = dragRegion == null ? 0 : dragRegion.left;
+        final int dragRegionTop = dragRegion == null ? 0 : dragRegion.top;
+
+        mLastDropTarget = null;
+
+        mDragObject = new DropTarget.DragObject(mActivity.getApplicationContext());
+        mDragObject.originalView = originalView;
+
+        mIsInPreDrag = mOptions.preDragCondition != null
+                && !mOptions.preDragCondition.shouldStartDrag(0);
+
+        float scalePx = mDragIconSize - dragRegion.width();
+        final DragView dragView = mDragObject.dragView = new TaskbarDragView(
+                mActivity,
+                drawable,
+                mRegistrationX,
+                mRegistrationY,
+                initialDragViewScale,
+                dragViewScaleOnDrop,
+                scalePx);
+        dragView.setItemInfo(dragInfo);
+        mDragObject.dragComplete = false;
+
+        mDragObject.xOffset = mMotionDown.x - (dragLayerX + dragRegionLeft);
+        mDragObject.yOffset = mMotionDown.y - (dragLayerY + dragRegionTop);
+
+        mDragDriver = DragDriver.create(this, mOptions, /* secondaryEventConsumer = */ ev -> {});
+        if (!mOptions.isAccessibleDrag) {
+            mDragObject.stateAnnouncer = DragViewStateAnnouncer.createFor(dragView);
+        }
+
+        mDragObject.dragSource = source;
+        mDragObject.dragInfo = dragInfo;
+        mDragObject.originalDragInfo = mDragObject.dragInfo.makeShallowCopy();
+
+        if (dragRegion != null) {
+            dragView.setDragRegion(new Rect(dragRegion));
+        }
+
+        dragView.show(mLastTouch.x, mLastTouch.y);
+        mDistanceSinceScroll = 0;
+
+        if (!mIsInPreDrag) {
+            callOnDragStart();
+        } else if (mOptions.preDragCondition != null) {
+            mOptions.preDragCondition.onPreDragStart(mDragObject);
+        }
+
+        handleMoveEvent(mLastTouch.x, mLastTouch.y);
+
+        return dragView;
+    }
+
+    @Override
+    protected void callOnDragStart() {
+        super.callOnDragStart();
+        // Pre-drag has ended, start the global system drag.
+        AbstractFloatingView.closeAllOpenViews(mActivity);
+        startSystemDrag((BubbleTextView) mDragObject.originalView);
+    }
+
+    private void startSystemDrag(BubbleTextView btv) {
+        View.DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(btv) {
+
             @Override
             public void onProvideShadowMetrics(Point shadowSize, Point shadowTouchPoint) {
                 shadowSize.set(mDragIconSize, mDragIconSize);
-                // TODO: should be based on last touch point on the icon.
-                shadowTouchPoint.set(shadowSize.x / 2, shadowSize.y / 2);
+                // The registration point was taken before the icon scaled to mDragIconSize, so
+                // offset the registration to where the touch is on the new size.
+                int offset = (mDragIconSize - btv.getIconSize()) / 2;
+                shadowTouchPoint.set(mRegistrationX + offset, mRegistrationY + offset);
             }
 
             @Override
@@ -81,12 +231,12 @@
             }
         };
 
-        Object tag = view.getTag();
+        Object tag = btv.getTag();
         ClipDescription clipDescription = null;
         Intent intent = null;
         if (tag instanceof WorkspaceItemInfo) {
             WorkspaceItemInfo item = (WorkspaceItemInfo) tag;
-            LauncherApps launcherApps = mContext.getSystemService(LauncherApps.class);
+            LauncherApps launcherApps = mActivity.getSystemService(LauncherApps.class);
             clipDescription = new ClipDescription(item.title,
                     new String[] {
                             item.itemType == LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT
@@ -116,28 +266,82 @@
 
         if (clipDescription != null && intent != null) {
             ClipData clipData = new ClipData(clipDescription, new ClipData.Item(intent));
-            view.setOnDragListener(getDraggedViewDragListener());
-            return view.startDragAndDrop(clipData, shadowBuilder, null /* localState */,
-                    View.DRAG_FLAG_GLOBAL | View.DRAG_FLAG_OPAQUE);
+            if (btv.startDragAndDrop(clipData, shadowBuilder, null /* localState */,
+                    View.DRAG_FLAG_GLOBAL | View.DRAG_FLAG_OPAQUE)) {
+                onSystemDragStarted();
+            }
         }
-        return false;
     }
 
-    /**
-     * Hide the original Taskbar item while it is being dragged.
-     */
-    private View.OnDragListener getDraggedViewDragListener() {
-        return (view, dragEvent) -> {
+    private void onSystemDragStarted() {
+        mIsSystemDragInProgress = true;
+        mActivity.getDragLayer().setOnDragListener((view, dragEvent) -> {
             switch (dragEvent.getAction()) {
                 case DragEvent.ACTION_DRAG_STARTED:
-                    view.setVisibility(INVISIBLE);
+                    // Return true to tell system we are interested in events, so we get DRAG_ENDED.
                     return true;
                 case DragEvent.ACTION_DRAG_ENDED:
-                    view.setVisibility(VISIBLE);
-                    view.setOnDragListener(null);
+                    mIsSystemDragInProgress = false;
+                    maybeOnDragEnd();
                     return true;
             }
             return false;
-        };
+        });
+    }
+
+    @Override
+    public boolean isDragging() {
+        return super.isDragging() || mIsSystemDragInProgress;
+    }
+
+    private void maybeOnDragEnd() {
+        if (!isDragging()) {
+            ((View) mDragObject.originalView).setVisibility(VISIBLE);
+        }
+    }
+
+    @Override
+    protected void callOnDragEnd() {
+        super.callOnDragEnd();
+        maybeOnDragEnd();
+    }
+
+    @Override
+    protected float getX(MotionEvent ev) {
+        // We will resize to fill the screen while dragging, so use screen coordinates. This ensures
+        // we start at the correct position even though touch down is on the smaller DragLayer size.
+        return ev.getRawX();
+    }
+
+    @Override
+    protected float getY(MotionEvent ev) {
+        // We will resize to fill the screen while dragging, so use screen coordinates. This ensures
+        // we start at the correct position even though touch down is on the smaller DragLayer size.
+        return ev.getRawY();
+    }
+
+    @Override
+    protected Point getClampedDragLayerPos(float x, float y) {
+        // No need to clamp, as we will take up the entire screen.
+        mTmpPoint.set(Math.round(x), Math.round(y));
+        return mTmpPoint;
+    }
+
+    @Override
+    protected void exitDrag() {
+        if (mDragObject != null) {
+            mActivity.getDragLayer().removeView(mDragObject.dragView);
+        }
+    }
+
+    @Override
+    public void addDropTarget(DropTarget target) {
+        // No-op as Taskbar currently doesn't support any drop targets internally.
+        // Note: if we do add internal DropTargets, we'll still need to ignore Folder.
+    }
+
+    @Override
+    protected DropTarget getDefaultDropTarget(int[] dropCoordinates) {
+        return null;
     }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java
index 45ec911..c684543 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java
@@ -18,7 +18,6 @@
 import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.Paint;
-import android.graphics.Rect;
 import android.util.AttributeSet;
 import android.view.View;
 
@@ -37,11 +36,9 @@
  */
 public class TaskbarDragLayer extends BaseDragLayer<TaskbarActivityContext> {
 
-    private final int mFolderMargin;
     private final Paint mTaskbarBackgroundPaint;
 
-    private TaskbarIconController.Callbacks mControllerCallbacks;
-    private TaskbarView mTaskbarView;
+    private TaskbarDragLayerController.TaskbarDragLayerCallbacks mControllerCallbacks;
 
     private final OnComputeInsetsListener mTaskbarInsetsComputer = this::onComputeTaskbarInsets;
 
@@ -61,25 +58,25 @@
     public TaskbarDragLayer(@NonNull Context context, @Nullable AttributeSet attrs,
             int defStyleAttr, int defStyleRes) {
         super(context, attrs, 1 /* alphaChannelCount */);
-        mFolderMargin = getResources().getDimensionPixelSize(R.dimen.taskbar_folder_margin);
         mTaskbarBackgroundPaint = new Paint();
         mTaskbarBackgroundPaint.setColor(getResources().getColor(R.color.taskbar_background));
+        mTaskbarBackgroundPaint.setAlpha(0);
+    }
+
+    public void init(TaskbarDragLayerController.TaskbarDragLayerCallbacks callbacks) {
+        mControllerCallbacks = callbacks;
         recreateControllers();
     }
 
     @Override
     public void recreateControllers() {
-        mControllers = new TouchController[0];
-    }
-
-    public void init(TaskbarIconController.Callbacks callbacks, TaskbarView taskbarView) {
-        mControllerCallbacks = callbacks;
-        mTaskbarView = taskbarView;
+        mControllers = new TouchController[] {mActivity.getDragController()};
     }
 
     private void onComputeTaskbarInsets(InsetsInfo insetsInfo) {
         if (mControllerCallbacks != null) {
             mControllerCallbacks.updateInsetsTouchability(insetsInfo);
+            mControllerCallbacks.updateContentInsets(insetsInfo.contentInsets);
         }
     }
 
@@ -108,12 +105,6 @@
         return true;
     }
 
-    public void updateImeBarVisibilityAlpha(float alpha) {
-        if (mControllerCallbacks != null) {
-            mControllerCallbacks.updateImeBarVisibilityAlpha(alpha);
-        }
-    }
-
     @Override
     public void onViewRemoved(View child) {
         super.onViewRemoved(child);
@@ -124,22 +115,12 @@
 
     @Override
     protected void dispatchDraw(Canvas canvas) {
-        canvas.drawRect(0, canvas.getHeight() - mTaskbarView.getHeight(), canvas.getWidth(),
-                canvas.getHeight(), mTaskbarBackgroundPaint);
+        canvas.drawRect(0, canvas.getHeight() - mControllerCallbacks.getTaskbarBackgroundHeight(),
+                canvas.getWidth(), canvas.getHeight(), mTaskbarBackgroundPaint);
         super.dispatchDraw(canvas);
     }
 
     /**
-     * @return Bounds (in our coordinates) where an opened Folder can display.
-     */
-    protected Rect getFolderBoundingBox() {
-        Rect boundingBox = new Rect(0, 0, getWidth(), getHeight() - mTaskbarView.getHeight());
-        boundingBox.inset(mFolderMargin, mFolderMargin);
-        return boundingBox;
-    }
-
-
-    /**
      * Sets the alpha of the background color behind all the Taskbar contents.
      * @param alpha 0 is fully transparent, 1 is fully opaque.
      */
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayerController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayerController.java
new file mode 100644
index 0000000..2efbd4f
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayerController.java
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.taskbar;
+
+import static com.android.launcher3.AbstractFloatingView.TYPE_ALL;
+import static com.android.systemui.shared.system.ViewTreeObserverWrapper.InsetsInfo.TOUCHABLE_INSETS_FRAME;
+import static com.android.systemui.shared.system.ViewTreeObserverWrapper.InsetsInfo.TOUCHABLE_INSETS_REGION;
+
+import android.content.res.Resources;
+import android.graphics.Rect;
+
+import com.android.launcher3.AbstractFloatingView;
+import com.android.launcher3.R;
+import com.android.launcher3.anim.AlphaUpdateListener;
+import com.android.quickstep.AnimatedFloat;
+import com.android.systemui.shared.system.ViewTreeObserverWrapper.InsetsInfo;
+
+/**
+ * Handles properties/data collection, then passes the results to TaskbarDragLayer to render.
+ */
+public class TaskbarDragLayerController {
+
+    private final TaskbarActivityContext mActivity;
+    private final TaskbarDragLayer mTaskbarDragLayer;
+    private final int mFolderMargin;
+    // Alpha properties for taskbar background.
+    private final AnimatedFloat mBgTaskbar = new AnimatedFloat(this::updateBackgroundAlpha);
+    private final AnimatedFloat mBgNavbar = new AnimatedFloat(this::updateBackgroundAlpha);
+
+    // Initialized in init.
+    private TaskbarControllers mControllers;
+
+    public TaskbarDragLayerController(TaskbarActivityContext activity,
+            TaskbarDragLayer taskbarDragLayer) {
+        mActivity = activity;
+        mTaskbarDragLayer = taskbarDragLayer;
+        final Resources resources = mTaskbarDragLayer.getResources();
+        mFolderMargin = resources.getDimensionPixelSize(R.dimen.taskbar_folder_margin);
+    }
+
+    public void init(TaskbarControllers controllers) {
+        mControllers = controllers;
+        mTaskbarDragLayer.init(new TaskbarDragLayerCallbacks());
+    }
+
+    public void onDestroy() {
+        mTaskbarDragLayer.onDestroy();
+    }
+
+    /**
+     * @return Bounds (in TaskbarDragLayer coordinates) where an opened Folder can display.
+     */
+    public Rect getFolderBoundingBox() {
+        Rect boundingBox = new Rect(0, 0, mTaskbarDragLayer.getWidth(),
+                mTaskbarDragLayer.getHeight() - mActivity.getDeviceProfile().taskbarSize);
+        boundingBox.inset(mFolderMargin, mFolderMargin);
+        return boundingBox;
+    }
+
+    public AnimatedFloat getTaskbarBackgroundAlpha() {
+        return mBgTaskbar;
+    }
+
+    public AnimatedFloat getNavbarBackgroundAlpha() {
+        return mBgNavbar;
+    }
+
+    private void updateBackgroundAlpha() {
+        mTaskbarDragLayer.setTaskbarBackgroundAlpha(Math.max(mBgNavbar.value, mBgTaskbar.value));
+    }
+
+    /**
+     * Callbacks for {@link TaskbarDragLayer} to interact with its controller.
+     */
+    public class TaskbarDragLayerCallbacks {
+
+        /**
+         * Called to update the touchable insets.
+         * @see InsetsInfo#setTouchableInsets(int)
+         */
+        public void updateInsetsTouchability(InsetsInfo insetsInfo) {
+            insetsInfo.touchableRegion.setEmpty();
+            if (mTaskbarDragLayer.getAlpha() < AlphaUpdateListener.ALPHA_CUTOFF_THRESHOLD) {
+                // Let touches pass through us.
+                insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_REGION);
+            } else if (mControllers.navbarButtonsViewController.isImeVisible()) {
+                insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_FRAME);
+            } else if (!mControllers.uiController.isTaskbarTouchable()) {
+                // Let touches pass through us.
+                insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_REGION);
+            } else if (mControllers.taskbarViewController.areIconsVisible()) {
+                // Buttons are visible, take over the full taskbar area
+                insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_FRAME);
+            } else {
+                mControllers.navbarButtonsViewController.addVisibleButtonsRegion(
+                        mTaskbarDragLayer, insetsInfo.touchableRegion);
+                insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_REGION);
+            }
+        }
+
+        /**
+         * Called to update the {@link InsetsInfo#contentInsets}.
+         */
+        public void updateContentInsets(Rect outContentInsets) {
+            mControllers.uiController.updateContentInsets(outContentInsets);
+        }
+
+        /**
+         * Called when a child is removed from TaskbarDragLayer.
+         */
+        public void onDragLayerViewRemoved() {
+            if (AbstractFloatingView.getOpenView(mActivity, TYPE_ALL) == null) {
+                mActivity.setTaskbarWindowFullscreen(false);
+            }
+        }
+
+        /**
+         * Returns how tall the background should be drawn at the bottom of the screen.
+         */
+        public int getTaskbarBackgroundHeight() {
+            return mActivity.getDeviceProfile().taskbarSize;
+        }
+    }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragView.java
new file mode 100644
index 0000000..cf28eff
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragView.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.taskbar;
+
+import android.graphics.drawable.Drawable;
+
+import com.android.launcher3.R;
+import com.android.launcher3.dragndrop.DragView;
+
+/**
+ * A DragView drawn/used by the Taskbar. Note that this is only for the internal drag-and-drop,
+ * while the pre-drag is still in progress (i.e. when the long press popup is still open). After
+ * that ends, we switch to a system drag and drop view instead.
+ */
+public class TaskbarDragView extends DragView<TaskbarActivityContext> {
+    public TaskbarDragView(TaskbarActivityContext launcher, Drawable drawable, int registrationX,
+            int registrationY, float initialScale, float scaleOnDrop, float finalScaleDps) {
+        super(launcher, drawable, registrationX, registrationY, initialScale, scaleOnDrop,
+                finalScaleDps);
+    }
+
+    @Override
+    public void animateTo(int toTouchX, int toTouchY, Runnable onCompleteRunnable, int duration) {
+        Runnable onAnimationEnd = () -> {
+            if (onCompleteRunnable != null) {
+                onCompleteRunnable.run();
+            }
+            mActivity.getDragLayer().removeView(this);
+        };
+
+        duration = Math.max(duration,
+                getResources().getInteger(R.integer.config_dropAnimMinDuration));
+
+        animate()
+                .translationX(toTouchX - mRegistrationX)
+                .translationY(toTouchY - mRegistrationY)
+                .scaleX(mScaleOnDrop)
+                .scaleY(mScaleOnDrop)
+                .withEndAction(onAnimationEnd)
+                .setDuration(duration)
+                .start();
+    }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarIconController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarIconController.java
deleted file mode 100644
index 683a5b9..0000000
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarIconController.java
+++ /dev/null
@@ -1,163 +0,0 @@
-/*
- * Copyright (C) 2021 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.android.launcher3.taskbar;
-
-import static android.view.View.GONE;
-import static android.view.View.VISIBLE;
-
-import static com.android.systemui.shared.system.ViewTreeObserverWrapper.InsetsInfo.TOUCHABLE_INSETS_FRAME;
-import static com.android.systemui.shared.system.ViewTreeObserverWrapper.InsetsInfo.TOUCHABLE_INSETS_REGION;
-
-import android.graphics.Rect;
-import android.inputmethodservice.InputMethodService;
-import android.view.View;
-import android.view.View.OnClickListener;
-import android.view.View.OnLongClickListener;
-
-import androidx.annotation.NonNull;
-
-import com.android.launcher3.R;
-import com.android.launcher3.anim.AlphaUpdateListener;
-import com.android.systemui.shared.system.ViewTreeObserverWrapper.InsetsInfo;
-
-/**
- * Controller for taskbar icon UI
- */
-public class TaskbarIconController {
-
-    private final Rect mTempRect = new Rect();
-
-    private final TaskbarActivityContext mActivity;
-    private final TaskbarDragLayer mDragLayer;
-
-    private final TaskbarView mTaskbarView;
-    private final ImeBarView mImeBarView;
-
-    @NonNull
-    private TaskbarUIController mUIController = TaskbarUIController.DEFAULT;
-
-    TaskbarIconController(TaskbarActivityContext activity, TaskbarDragLayer dragLayer) {
-        mActivity = activity;
-        mDragLayer = dragLayer;
-        mTaskbarView = mDragLayer.findViewById(R.id.taskbar_view);
-        mImeBarView = mDragLayer.findViewById(R.id.ime_bar_view);
-    }
-
-    public void init(OnClickListener clickListener, OnLongClickListener longClickListener) {
-        mDragLayer.addOnLayoutChangeListener((v, a, b, c, d, e, f, g, h) ->
-                mUIController.alignRealHotseatWithTaskbar());
-
-        ButtonProvider buttonProvider = new ButtonProvider(mActivity);
-        mImeBarView.init(buttonProvider);
-        mTaskbarView.construct(clickListener, longClickListener, buttonProvider);
-        mTaskbarView.getLayoutParams().height = mActivity.getDeviceProfile().taskbarSize;
-
-        mDragLayer.init(new Callbacks(), mTaskbarView);
-    }
-
-    public void onDestroy() {
-        mDragLayer.onDestroy();
-    }
-
-    public void setUIController(@NonNull TaskbarUIController uiController) {
-        mUIController = uiController;
-    }
-
-    /**
-     * When in 3 button nav, the above doesn't get called since we prevent sysui nav bar from
-     * instantiating at all, which is what's responsible for sending sysui state flags over.
-     *
-     * @param vis IME visibility flag
-     */
-    public void updateImeStatus(int displayId, int vis, boolean showImeSwitcher) {
-        if (displayId != mActivity.getDisplayId() || !mActivity.canShowNavButtons()) {
-            return;
-        }
-
-        mImeBarView.setImeSwitcherVisibility(showImeSwitcher);
-        setImeIsVisible((vis & InputMethodService.IME_VISIBLE) != 0);
-    }
-
-    /**
-     * Should be called when the IME visibility changes, so we can hide/show Taskbar accordingly.
-     */
-    public void setImeIsVisible(boolean isImeVisible) {
-        mTaskbarView.setTouchesEnabled(!isImeVisible);
-        mUIController.onImeVisible(mDragLayer, isImeVisible);
-    }
-
-    /**
-     * Callbacks for {@link TaskbarDragLayer} to interact with the icon controller
-     */
-    public class Callbacks {
-
-        /**
-         * Called to update the touchable insets
-         */
-        public void updateInsetsTouchability(InsetsInfo insetsInfo) {
-            insetsInfo.touchableRegion.setEmpty();
-            if (mDragLayer.getAlpha() < AlphaUpdateListener.ALPHA_CUTOFF_THRESHOLD) {
-                // Let touches pass through us.
-                insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_REGION);
-            } else if (mImeBarView.getVisibility() == VISIBLE) {
-                insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_FRAME);
-            } else if (!mUIController.isTaskbarTouchable()) {
-                // Let touches pass through us.
-                insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_REGION);
-            } else if (mTaskbarView.areIconsVisible()) {
-                // Buttons are visible, take over the full taskbar area
-                insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_FRAME);
-            } else {
-                if (mTaskbarView.mSystemButtonContainer.getVisibility() == VISIBLE) {
-                    mDragLayer.getDescendantRectRelativeToSelf(
-                            mTaskbarView.mSystemButtonContainer, mTempRect);
-                    insetsInfo.touchableRegion.set(mTempRect);
-                }
-                insetsInfo.setTouchableInsets(TOUCHABLE_INSETS_REGION);
-            }
-
-            // TaskbarContainerView provides insets to other apps based on contentInsets. These
-            // insets should stay consistent even if we expand TaskbarContainerView's bounds, e.g.
-            // to show a floating view like Folder. Thus, we set the contentInsets to be where
-            // mTaskbarView is, since its position never changes and insets rather than overlays.
-            insetsInfo.contentInsets.left = mTaskbarView.getLeft();
-            insetsInfo.contentInsets.top = mTaskbarView.getTop();
-            insetsInfo.contentInsets.right = mDragLayer.getWidth() - mTaskbarView.getRight();
-            insetsInfo.contentInsets.bottom = mDragLayer.getHeight() - mTaskbarView.getBottom();
-        }
-
-        public void onDragLayerViewRemoved() {
-            int count = mDragLayer.getChildCount();
-            // Ensure no other children present (like Folders, etc)
-            for (int i = 0; i < count; i++) {
-                View v = mDragLayer.getChildAt(i);
-                if (!((v instanceof TaskbarView) || (v instanceof ImeBarView))) {
-                    return;
-                }
-            }
-            mActivity.setTaskbarWindowFullscreen(false);
-        }
-
-        public void updateImeBarVisibilityAlpha(float alpha) {
-            if (!mActivity.canShowNavButtons()) {
-                // TODO Remove sysui IME bar for gesture nav as well
-                return;
-            }
-            mImeBarView.setAlpha(alpha);
-            mImeBarView.setVisibility(alpha == 0 ? GONE : VISIBLE);
-        }
-    }
-}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarManager.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarManager.java
index d026bfb..3563d09 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarManager.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarManager.java
@@ -21,11 +21,9 @@
 import static com.android.launcher3.util.DisplayController.CHANGE_ACTIVE_SCREEN;
 import static com.android.launcher3.util.DisplayController.CHANGE_DENSITY;
 import static com.android.launcher3.util.DisplayController.CHANGE_SUPPORTED_BOUNDS;
-import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_IME_SHOWING;
 
 import android.content.Context;
 import android.hardware.display.DisplayManager;
-import android.inputmethodservice.InputMethodService;
 import android.view.Display;
 
 import androidx.annotation.Nullable;
@@ -41,7 +39,7 @@
 import com.android.quickstep.TouchInteractionService;
 
 /**
- * Class to manager taskbar lifecycle
+ * Class to manage taskbar lifecycle
  */
 public class TaskbarManager implements DisplayController.DisplayInfoChangeListener,
         SysUINavigationMode.NavigationModeChangeListener {
@@ -53,6 +51,11 @@
 
     private TaskbarActivityContext mTaskbarActivityContext;
     private BaseQuickstepLauncher mLauncher;
+    /**
+     * Cache a copy here so we can initialize state whenever taskbar is recreated, since
+     * this class does not get re-initialized w/ new taskbars.
+     */
+    private int mSysuiStateFlags;
 
     private static final int CHANGE_FLAGS =
             CHANGE_ACTIVE_SCREEN | CHANGE_DENSITY | CHANGE_SUPPORTED_BOUNDS;
@@ -130,6 +133,7 @@
             mTaskbarActivityContext.setUIController(
                     new LauncherTaskbarUIController(mLauncher, mTaskbarActivityContext));
         }
+        onSysuiFlagsChangedInternal(mSysuiStateFlags, true /* forceUpdate */);
     }
 
     /**
@@ -137,24 +141,31 @@
      * @param systemUiStateFlags The latest SystemUiStateFlags
      */
     public void onSystemUiFlagsChanged(int systemUiStateFlags) {
-        boolean isImeVisible = (systemUiStateFlags & SYSUI_STATE_IME_SHOWING) != 0;
+        onSysuiFlagsChangedInternal(systemUiStateFlags, false /* forceUpdate */);
+    }
+
+    private void onSysuiFlagsChangedInternal(int systemUiStateFlags, boolean forceUpdate) {
+        mSysuiStateFlags = systemUiStateFlags;
         if (mTaskbarActivityContext != null) {
-            mTaskbarActivityContext.setImeIsVisible(isImeVisible);
+            mTaskbarActivityContext.updateSysuiStateFlags(systemUiStateFlags, forceUpdate);
         }
     }
 
-    /**
-     * When in 3 button nav, the above doesn't get called since we prevent sysui nav bar from
-     * instantiating at all, which is what's responsible for sending sysui state flags over.
-     *
-     * @param vis IME visibility flag
-     * @param backDisposition Used to determine back button behavior for software keyboard
-     *                        See BACK_DISPOSITION_* constants in {@link InputMethodService}
-     */
-    public void updateImeStatus(int displayId, int vis, int backDisposition,
-            boolean showImeSwitcher) {
+    public void onRotationProposal(int rotation, boolean isValid) {
         if (mTaskbarActivityContext != null) {
-            mTaskbarActivityContext.updateImeStatus(displayId, vis, showImeSwitcher);
+            mTaskbarActivityContext.onRotationProposal(rotation, isValid);
+        }
+    }
+
+    public void disable(int displayId, int state1, int state2, boolean animate) {
+        if (mTaskbarActivityContext != null) {
+            mTaskbarActivityContext.disable(displayId, state1, state2, animate);
+        }
+    }
+
+    public void onSystemBarAttributesChanged(int displayId, int behavior) {
+        if (mTaskbarActivityContext != null) {
+            mTaskbarActivityContext.onSystemBarAttributesChanged(displayId, behavior);
         }
     }
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarNavButtonController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarNavButtonController.java
index 3b5afad..002d42d 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarNavButtonController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarNavButtonController.java
@@ -44,7 +44,9 @@
             BUTTON_BACK,
             BUTTON_HOME,
             BUTTON_RECENTS,
-            BUTTON_IME_SWITCH
+            BUTTON_IME_SWITCH,
+            BUTTON_A11Y,
+            BUTTON_A11Y_LONG_CLICK
     })
 
     public @interface TaskbarButton {}
@@ -53,6 +55,8 @@
     static final int BUTTON_HOME = BUTTON_BACK << 1;
     static final int BUTTON_RECENTS = BUTTON_HOME << 1;
     static final int BUTTON_IME_SWITCH = BUTTON_RECENTS << 1;
+    static final int BUTTON_A11Y = BUTTON_IME_SWITCH << 1;
+    static final int BUTTON_A11Y_LONG_CLICK = BUTTON_A11Y << 1;
 
     private final TouchInteractionService mService;
 
@@ -74,6 +78,12 @@
             case BUTTON_IME_SWITCH:
                 showIMESwitcher();
                 break;
+            case BUTTON_A11Y:
+                notifyImeClick(false /* longClick */);
+                break;
+            case BUTTON_A11Y_LONG_CLICK:
+                notifyImeClick(true /* longClick */);
+                break;
         }
     }
 
@@ -97,4 +107,13 @@
                 .showInputMethodPickerFromSystem(true /* showAuxiliarySubtypes */,
                         DEFAULT_DISPLAY);
     }
+
+    private void notifyImeClick(boolean longClick) {
+        SystemUiProxy systemUiProxy = SystemUiProxy.INSTANCE.getNoCreate();
+        if (longClick) {
+            systemUiProxy.notifyAccessibilityButtonLongClicked();
+        } else {
+            systemUiProxy.notifyAccessibilityButtonClicked(mService.getDisplayId());
+        }
+    }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarStateHandler.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarStateHandler.java
index a701aae..20d4133 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarStateHandler.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarStateHandler.java
@@ -16,7 +16,6 @@
 package com.android.launcher3.taskbar;
 
 import static com.android.launcher3.LauncherState.TASKBAR;
-import static com.android.launcher3.anim.Interpolators.ACCEL_DEACCEL;
 import static com.android.launcher3.anim.Interpolators.LINEAR;
 
 import androidx.annotation.Nullable;
@@ -27,7 +26,9 @@
 import com.android.launcher3.anim.PropertySetter;
 import com.android.launcher3.statemanager.StateManager;
 import com.android.launcher3.states.StateAnimationConfig;
+import com.android.launcher3.util.MultiValueAlpha;
 import com.android.quickstep.AnimatedFloat;
+import com.android.quickstep.SystemUiProxy;
 
 /**
  * StateHandler to animate Taskbar according to Launcher's state machine. Does nothing if Taskbar
@@ -37,15 +38,20 @@
 
     private final BaseQuickstepLauncher mLauncher;
 
-    // Contains Taskbar-related methods and fields we should aniamte. If null, don't do anything.
-    private @Nullable TaskbarAnimationController mAnimationController = null;
+    // Contains Taskbar-related properties we should aniamte. If null, don't do anything.
+    private @Nullable MultiValueAlpha.AlphaProperty mTaskbarAlpha = null;
+
+    private AnimatedFloat mNavbarButtonAlpha = new AnimatedFloat(this::updateNavbarButtonAlpha);
 
     public TaskbarStateHandler(BaseQuickstepLauncher launcher) {
         mLauncher = launcher;
     }
 
-    public void setAnimationController(TaskbarAnimationController callbacks) {
-        mAnimationController = callbacks;
+    public void setAnimationController(MultiValueAlpha.AlphaProperty taskbarAlpha) {
+        mTaskbarAlpha = taskbarAlpha;
+        // Reapply state.
+        setState(mLauncher.getStateManager().getState());
+        updateNavbarButtonAlpha();
     }
 
     @Override
@@ -59,17 +65,24 @@
         setState(toState, animation);
     }
 
-    private void setState(LauncherState toState, PropertySetter setter) {
-        if (mAnimationController == null) {
+    /**
+     * Sets the provided state
+     */
+    public void setState(LauncherState toState, PropertySetter setter) {
+        if (mTaskbarAlpha == null) {
             return;
         }
 
         boolean isTaskbarVisible = (toState.getVisibleElements(mLauncher) & TASKBAR) != 0;
-        setter.setFloat(mAnimationController.getTaskbarVisibilityForLauncherState(),
-                AnimatedFloat.VALUE, isTaskbarVisible ? 1f : 0f, LINEAR);
-        setter.setFloat(mAnimationController.getTaskbarScaleForLauncherState(),
-                AnimatedFloat.VALUE, toState.getTaskbarScale(mLauncher), LINEAR);
-        setter.setFloat(mAnimationController.getTaskbarTranslationYForLauncherState(),
-                AnimatedFloat.VALUE, toState.getTaskbarTranslationY(mLauncher), ACCEL_DEACCEL);
+        setter.setFloat(mTaskbarAlpha, MultiValueAlpha.VALUE, isTaskbarVisible ? 1f : 0f, LINEAR);
+        // Make the nav bar visible in states that taskbar isn't visible.
+        // TODO: We should draw our own handle instead of showing the nav bar.
+        float navbarButtonAlpha = isTaskbarVisible ? 0f : 1f;
+        setter.setFloat(mNavbarButtonAlpha, AnimatedFloat.VALUE, navbarButtonAlpha, LINEAR);
+    }
+
+
+    private void updateNavbarButtonAlpha() {
+        SystemUiProxy.INSTANCE.get(mLauncher).setNavBarButtonAlpha(mNavbarButtonAlpha.value, false);
     }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
index 50adead..260cedc 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
@@ -15,6 +15,8 @@
  */
 package com.android.launcher3.taskbar;
 
+import android.graphics.Rect;
+
 /**
  * Base class for providing different taskbar UI
  */
@@ -22,12 +24,7 @@
 
     public static final TaskbarUIController DEFAULT = new TaskbarUIController();
 
-    /**
-     * Pads the Hotseat to line up exactly with Taskbar's copy of the Hotseat.
-     */
-    public void alignRealHotseatWithTaskbar() { }
-
-    protected void onCreate() { }
+    protected void init(TaskbarControllers taskbarControllers) { }
 
     protected void onDestroy() { }
 
@@ -35,7 +32,5 @@
         return true;
     }
 
-    protected void onImeVisible(TaskbarDragLayer container, boolean isVisible) {
-        container.updateImeBarVisibilityAlpha(isVisible ? 1 : 0);
-    }
+    protected void updateContentInsets(Rect outContentInsets) { }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
index c6573a6..a952182 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarView.java
@@ -15,76 +15,61 @@
  */
 package com.android.launcher3.taskbar;
 
-import static android.view.View.MeasureSpec.EXACTLY;
-import static android.view.View.MeasureSpec.makeMeasureSpec;
+import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
+import static com.android.launcher3.LauncherAnimUtils.VIEW_TRANSLATE_X;
+import static com.android.launcher3.LauncherAnimUtils.VIEW_TRANSLATE_Y;
+import static com.android.launcher3.anim.Interpolators.LINEAR;
 
 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Canvas;
 import android.graphics.Rect;
-import android.graphics.RectF;
 import android.util.AttributeSet;
-import android.view.DragEvent;
-import android.view.Gravity;
 import android.view.MotionEvent;
 import android.view.View;
-import android.view.ViewConfiguration;
-import android.widget.LinearLayout;
+import android.widget.FrameLayout;
 
 import androidx.annotation.LayoutRes;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
-import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.BubbleTextView;
+import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Insettable;
 import com.android.launcher3.R;
-import com.android.launcher3.Utilities;
+import com.android.launcher3.anim.PropertySetter;
 import com.android.launcher3.folder.FolderIcon;
 import com.android.launcher3.model.data.FolderInfo;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
+import com.android.launcher3.uioverrides.ApiWrapper;
 import com.android.launcher3.views.ActivityContext;
 
 /**
  * Hosts the Taskbar content such as Hotseat and Recent Apps. Drawn on top of other apps.
  */
-public class TaskbarView extends LinearLayout implements FolderIcon.FolderIconParent, Insettable {
+public class TaskbarView extends FrameLayout implements FolderIcon.FolderIconParent, Insettable {
 
-    private final int mIconTouchSize;
-    private final boolean mIsRtl;
-    private final int mTouchSlop;
-    private final RectF mTempDelegateBounds = new RectF();
-    private final RectF mDelegateSlopBounds = new RectF();
     private final int[] mTempOutLocation = new int[2];
 
+    private final Rect mIconLayoutBounds = new Rect();
+    private final int mIconTouchSize;
     private final int mItemMarginLeftRight;
+    private final int mItemPadding;
 
     private final TaskbarActivityContext mActivityContext;
 
-    // Initialized in TaskbarController constructor.
+    // Initialized in init.
+    private TaskbarViewController.TaskbarViewCallbacks mControllerCallbacks;
     private View.OnClickListener mIconClickListener;
     private View.OnLongClickListener mIconLongClickListener;
 
-    LinearLayout mSystemButtonContainer;
-    LinearLayout mHotseatIconsContainer;
-
-    // Delegate touches to the closest view if within mIconTouchSize.
-    private boolean mDelegateTargeted;
-    private View mDelegateView;
     // Prevents dispatching touches to children if true
     private boolean mTouchEnabled = true;
 
-    private boolean mIsDraggingItem;
     // Only non-null when the corresponding Folder is open.
     private @Nullable FolderIcon mLeaveBehindFolderIcon;
 
-    /** Provider of buttons added to taskbar in 3 button nav */
-    private ButtonProvider mButtonProvider;
-
-    private boolean mDisableRelayout;
-    private boolean mAreHolesAllowed;
-
     public TaskbarView(@NonNull Context context) {
         this(context, null);
     }
@@ -105,85 +90,118 @@
 
         Resources resources = getResources();
         mIconTouchSize = resources.getDimensionPixelSize(R.dimen.taskbar_icon_touch_size);
-        mItemMarginLeftRight = resources.getDimensionPixelSize(R.dimen.taskbar_icon_spacing);
 
-        mIsRtl = Utilities.isRtl(resources);
-        mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
+        int actualMargin = resources.getDimensionPixelSize(R.dimen.taskbar_icon_spacing);
+        int actualIconSize = mActivityContext.getDeviceProfile().iconSizePx;
+
+        // We layout the icons to be of mIconTouchSize in width and height
+        mItemMarginLeftRight = actualMargin - (mIconTouchSize - actualIconSize) / 2;
+        mItemPadding = (mIconTouchSize - actualIconSize) / 2;
     }
 
-    @Override
-    protected void onFinishInflate() {
-        super.onFinishInflate();
-        mSystemButtonContainer = findViewById(R.id.system_button_layout);
-        mHotseatIconsContainer = findViewById(R.id.hotseat_icons_layout);
-    }
-
-    protected void construct(OnClickListener clickListener, OnLongClickListener longClickListener,
-                ButtonProvider buttonProvider) {
-        mIconClickListener = clickListener;
-        mIconLongClickListener = longClickListener;
-        mButtonProvider = buttonProvider;
-
-        if (mActivityContext.canShowNavButtons()) {
-            createNavButtons();
-        } else {
-            mSystemButtonContainer.setVisibility(GONE);
-        }
-
-        int numHotseatIcons = mActivityContext.getDeviceProfile().numShownHotseatIcons;
-        updateHotseatItems(new ItemInfo[numHotseatIcons]);
+    protected void init(TaskbarViewController.TaskbarViewCallbacks callbacks) {
+        mControllerCallbacks = callbacks;
+        mIconClickListener = mControllerCallbacks.getOnClickListener();
+        mIconLongClickListener = mControllerCallbacks.getOnLongClickListener();
     }
 
     /**
-     * Enables/disables empty icons in taskbar so that the layout matches with Launcher
+     * Aligns the icons in the taskbar to that of Launcher.
      */
-    public void setHolesAllowedInLayout(boolean areHolesAllowed) {
-        if (mAreHolesAllowed != areHolesAllowed) {
-            mAreHolesAllowed = areHolesAllowed;
-            updateHotseatItemsVisibility();
-            // TODO: Add animation
+    public void alignIconsWithLauncher(DeviceProfile launcherDp, PropertySetter setter) {
+        Rect hotseatPadding = launcherDp.getHotseatLayoutPadding(getContext());
+        float scaleUp = ((float) launcherDp.iconSizePx)
+                / mActivityContext.getDeviceProfile().iconSizePx;
+        int hotseatCellSize =
+                (launcherDp.availableWidthPx - hotseatPadding.left - hotseatPadding.right)
+                        / launcherDp.numShownHotseatIcons;
+
+        int offsetY = launcherDp.getTaskbarOffsetY();
+        setter.setFloat(this, VIEW_TRANSLATE_Y, -offsetY, LINEAR);
+        mActivityContext.setTaskbarWindowHeight(
+                mActivityContext.getDeviceProfile().taskbarSize + offsetY);
+
+        int count = getChildCount();
+        for (int i = 0; i < count; i++) {
+            View child = getChildAt(i);
+            ItemInfo info = (ItemInfo) child.getTag();
+            setter.setFloat(child, SCALE_PROPERTY, scaleUp, LINEAR);
+
+            float childCenter = (child.getLeft() + child.getRight()) / 2;
+            float hotseatIconCenter = hotseatPadding.left + hotseatCellSize * info.screenId
+                    + hotseatCellSize / 2;
+            setter.setFloat(child, VIEW_TRANSLATE_X, hotseatIconCenter - childCenter, LINEAR);
         }
     }
 
-    private void setHolesAllowedInLayoutNoAnimation(boolean areHolesAllowed) {
-        if (mAreHolesAllowed != areHolesAllowed) {
-            mAreHolesAllowed = areHolesAllowed;
-            updateHotseatItemsVisibility();
-            onMeasure(makeMeasureSpec(getMeasuredWidth(), EXACTLY),
-                    makeMeasureSpec(getMeasuredHeight(), EXACTLY));
-            onLayout(false, getLeft(), getTop(), getRight(), getBottom());
+    /**
+     * Aligns the icons in the taskbar to that of Launcher.
+     * @return a callback to be executed at the end of the setter
+     */
+    public Runnable resetIconPosition(PropertySetter setter) {
+        int count = getChildCount();
+        for (int i = 0; i < count; i++) {
+            View child = getChildAt(i);
+            setter.setFloat(child, SCALE_PROPERTY, 1, LINEAR);
+            setter.setFloat(child, VIEW_TRANSLATE_X, 0, LINEAR);
         }
+        setter.setFloat(this, VIEW_TRANSLATE_Y, 0, LINEAR);
+        return () -> mActivityContext.setTaskbarWindowHeight(
+                mActivityContext.getDeviceProfile().taskbarSize);
+    }
+
+    private void removeAndRecycle(View view) {
+        removeView(view);
+        view.setOnClickListener(null);
+        view.setOnLongClickListener(null);
+        if (!(view.getTag() instanceof FolderInfo)) {
+            mActivityContext.getViewCache().recycleView(view.getSourceLayoutResId(), view);
+        }
+        view.setTag(null);
     }
 
     /**
      * Inflates/binds the Hotseat views to show in the Taskbar given their ItemInfos.
      */
     protected void updateHotseatItems(ItemInfo[] hotseatItemInfos) {
+        int nextViewIndex = 0;
+
         for (int i = 0; i < hotseatItemInfos.length; i++) {
-            ItemInfo hotseatItemInfo = hotseatItemInfos[
-                    !mIsRtl ? i : hotseatItemInfos.length - i - 1];
-            View hotseatView = mHotseatIconsContainer.getChildAt(i);
+            ItemInfo hotseatItemInfo = hotseatItemInfos[i];
+            if (hotseatItemInfo == null) {
+                continue;
+            }
 
             // Replace any Hotseat views with the appropriate type if it's not already that type.
             final int expectedLayoutResId;
             boolean isFolder = false;
-            boolean needsReinflate = false;
-            if (hotseatItemInfo != null && hotseatItemInfo.isPredictedItem()) {
+            if (hotseatItemInfo.isPredictedItem()) {
                 expectedLayoutResId = R.layout.taskbar_predicted_app_icon;
             } else if (hotseatItemInfo instanceof FolderInfo) {
                 expectedLayoutResId = R.layout.folder_icon;
                 isFolder = true;
-                // Unlike for BubbleTextView, we can't reapply a new FolderInfo after inflation, so
-                // if the info changes we need to reinflate. This should only happen if a new folder
-                // is dragged to the position that another folder previously existed.
-                needsReinflate = hotseatView != null && hotseatView.getTag() != hotseatItemInfo;
             } else {
                 expectedLayoutResId = R.layout.taskbar_app_icon;
             }
-            if (hotseatView == null
-                    || hotseatView.getSourceLayoutResId() != expectedLayoutResId
-                    || needsReinflate) {
-                mHotseatIconsContainer.removeView(hotseatView);
+
+            View hotseatView = null;
+            while (nextViewIndex < getChildCount()) {
+                hotseatView = getChildAt(nextViewIndex);
+
+                // see if the view can be reused
+                if ((hotseatView.getSourceLayoutResId() != expectedLayoutResId)
+                        || (isFolder && (hotseatView.getTag() != hotseatItemInfo))) {
+                    // Unlike for BubbleTextView, we can't reapply a new FolderInfo after inflation,
+                    // so if the info changes we need to reinflate. This should only happen if a new
+                    // folder is dragged to the position that another folder previously existed.
+                    removeAndRecycle(hotseatView);
+                } else {
+                    // View found
+                    break;
+                }
+            }
+
+            if (hotseatView == null) {
                 if (isFolder) {
                     FolderInfo folderInfo = (FolderInfo) hotseatItemInfo;
                     FolderIcon folderIcon = FolderIcon.inflateFolderAndIcon(expectedLayoutResId,
@@ -193,10 +211,9 @@
                 } else {
                     hotseatView = inflate(expectedLayoutResId);
                 }
-                int iconSize = mActivityContext.getDeviceProfile().iconSizePx;
-                LayoutParams lp = new LayoutParams(iconSize, iconSize);
-                lp.setMargins(mItemMarginLeftRight, 0, mItemMarginLeftRight, 0);
-                mHotseatIconsContainer.addView(hotseatView, i, lp);
+                LayoutParams lp = new LayoutParams(mIconTouchSize, mIconTouchSize);
+                hotseatView.setPadding(mItemPadding, mItemPadding, mItemPadding, mItemPadding);
+                addView(hotseatView, nextViewIndex, lp);
             }
 
             // Apply the Hotseat ItemInfos, or hide the view if there is none for a given index.
@@ -204,29 +221,46 @@
                     && hotseatItemInfo instanceof WorkspaceItemInfo) {
                 ((BubbleTextView) hotseatView).applyFromWorkspaceItem(
                         (WorkspaceItemInfo) hotseatItemInfo);
-                hotseatView.setOnClickListener(mIconClickListener);
-                hotseatView.setOnLongClickListener(mIconLongClickListener);
-            } else if (isFolder) {
-                hotseatView.setOnClickListener(mIconClickListener);
-                hotseatView.setOnLongClickListener(mIconLongClickListener);
-            } else {
-                hotseatView.setOnClickListener(null);
-                hotseatView.setOnLongClickListener(null);
-                hotseatView.setTag(null);
             }
-            updateHotseatItemVisibility(hotseatView);
+            setClickAndLongClickListenersForIcon(hotseatView);
+            nextViewIndex++;
+        }
+        // Remove remaining views
+        while (nextViewIndex < getChildCount()) {
+            removeAndRecycle(getChildAt(nextViewIndex));
         }
     }
 
-    protected void updateHotseatItemsVisibility() {
-        for (int i = mHotseatIconsContainer.getChildCount() - 1; i >= 0; i--) {
-            updateHotseatItemVisibility(mHotseatIconsContainer.getChildAt(i));
-        }
+    /**
+     * Sets OnClickListener and OnLongClickListener for the given view.
+     */
+    public void setClickAndLongClickListenersForIcon(View icon) {
+        icon.setOnClickListener(mIconClickListener);
+        icon.setOnLongClickListener(mIconLongClickListener);
     }
 
-    private void updateHotseatItemVisibility(View hotseatView) {
-        hotseatView.setVisibility(
-                hotseatView.getTag() != null ? VISIBLE : (mAreHolesAllowed ? INVISIBLE : GONE));
+    @Override
+    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
+        int count = getChildCount();
+        int spaceNeeded = count * (mItemMarginLeftRight * 2 + mIconTouchSize);
+        int iconStart = (right - left - spaceNeeded) / 2;
+        int startOffset = ApiWrapper.getHotseatStartOffset(getContext());
+        if (startOffset > iconStart) {
+            int diff = startOffset - iconStart;
+            iconStart = isLayoutRtl() ? (iconStart - diff) : iconStart + diff;
+        }
+        // Layout the children
+        mIconLayoutBounds.left = iconStart;
+        mIconLayoutBounds.top = (bottom - top - mIconTouchSize) / 2;
+        mIconLayoutBounds.bottom = mIconLayoutBounds.top + mIconTouchSize;
+        for (int i = 0; i < count; i++) {
+            View child = getChildAt(i);
+            iconStart += mItemMarginLeftRight;
+            int iconEnd = iconStart + mIconTouchSize;
+            child.layout(iconStart, mIconLayoutBounds.top, iconEnd, mIconLayoutBounds.bottom);
+            iconStart = iconEnd + mItemMarginLeftRight;
+        }
+        mIconLayoutBounds.right = iconStart;
     }
 
     @Override
@@ -237,160 +271,19 @@
         return super.dispatchTouchEvent(ev);
     }
 
-    @Override
-    public boolean onTouchEvent(MotionEvent event) {
-        boolean handled = delegateTouchIfNecessary(event);
-        return super.onTouchEvent(event) || handled;
-    }
-
     public void setTouchesEnabled(boolean touchEnabled) {
         this.mTouchEnabled = touchEnabled;
     }
 
     /**
-     * User touched the Taskbar background. Determine whether the touch is close enough to a view
-     * that we should forward the touches to it.
-     * @return Whether a delegate view was chosen and it handled the touch event.
-     */
-    private boolean delegateTouchIfNecessary(MotionEvent event) {
-        final float x = event.getX();
-        final float y = event.getY();
-        if (mDelegateView == null && event.getAction() == MotionEvent.ACTION_DOWN) {
-            View delegateView = findDelegateView(x, y);
-            if (delegateView != null) {
-                mDelegateTargeted = true;
-                mDelegateView = delegateView;
-                mDelegateSlopBounds.set(mTempDelegateBounds);
-                mDelegateSlopBounds.inset(-mTouchSlop, -mTouchSlop);
-            }
-        }
-
-        boolean sendToDelegate = mDelegateTargeted;
-        boolean inBounds = true;
-        switch (event.getAction()) {
-            case MotionEvent.ACTION_MOVE:
-                inBounds = mDelegateSlopBounds.contains(x, y);
-                break;
-            case MotionEvent.ACTION_UP:
-            case MotionEvent.ACTION_CANCEL:
-                mDelegateTargeted = false;
-                break;
-        }
-
-        boolean handled = false;
-        if (sendToDelegate) {
-            if (inBounds) {
-                // Offset event coordinates to be inside the target view
-                event.setLocation(mDelegateView.getWidth() / 2f, mDelegateView.getHeight() / 2f);
-            } else {
-                // Offset event coordinates to be outside the target view (in case it does
-                // something like tracking pressed state)
-                event.setLocation(-mTouchSlop * 2, -mTouchSlop * 2);
-            }
-            handled = mDelegateView.dispatchTouchEvent(event);
-            // Cleanup if this was the last event to send to the delegate.
-            if (!mDelegateTargeted) {
-                mDelegateView = null;
-            }
-        }
-        return handled;
-    }
-
-    /**
-     * Return an item whose touch bounds contain the given coordinates,
-     * or null if no such item exists.
-     *
-     * Also sets {@link #mTempDelegateBounds} to be the touch bounds of the chosen delegate view.
-     */
-    private @Nullable View findDelegateView(float x, float y) {
-        for (int i = 0; i < getChildCount(); i++) {
-            View child = getChildAt(i);
-            if (!child.isShown() || !child.isClickable()) {
-                continue;
-            }
-            int childCenterX = child.getLeft() + child.getWidth() / 2;
-            int childCenterY = child.getTop() + child.getHeight() / 2;
-            mTempDelegateBounds.set(
-                    childCenterX - mIconTouchSize / 2f,
-                    childCenterY - mIconTouchSize / 2f,
-                    childCenterX + mIconTouchSize / 2f,
-                    childCenterY + mIconTouchSize / 2f);
-            if (mTempDelegateBounds.contains(x, y)) {
-                return child;
-            }
-        }
-        return null;
-    }
-
-    /**
      * Returns whether the given MotionEvent, *in screen coorindates*, is within any Taskbar item's
      * touch bounds.
      */
     public boolean isEventOverAnyItem(MotionEvent ev) {
         getLocationOnScreen(mTempOutLocation);
-        float xInOurCoordinates = ev.getX() - mTempOutLocation[0];
-        float yInOurCoorindates = ev.getY() - mTempOutLocation[1];
-        return findDelegateView(xInOurCoordinates, yInOurCoorindates) != null;
-    }
-
-    /**
-     * Add back/home/recents buttons into a single ViewGroup that will be inserted at
-     * {@param navButtonStartIndex}
-     */
-    private void createNavButtons() {
-        LinearLayout.LayoutParams buttonParams = new LinearLayout.LayoutParams(
-                mActivityContext.getDeviceProfile().iconSizePx,
-                mActivityContext.getDeviceProfile().iconSizePx
-        );
-        buttonParams.gravity = Gravity.CENTER;
-
-        mSystemButtonContainer.addView(mButtonProvider.getBack(), buttonParams);
-        mSystemButtonContainer.addView(mButtonProvider.getHome(), buttonParams);
-        mSystemButtonContainer.addView(mButtonProvider.getRecents(), buttonParams);
-    }
-
-    @Override
-    public boolean onDragEvent(DragEvent event) {
-        switch (event.getAction()) {
-            case DragEvent.ACTION_DRAG_STARTED:
-                mIsDraggingItem = true;
-                AbstractFloatingView.closeAllOpenViews(mActivityContext);
-                return true;
-            case DragEvent.ACTION_DRAG_ENDED:
-                mIsDraggingItem = false;
-                break;
-        }
-        return super.onDragEvent(event);
-    }
-
-    public boolean isDraggingItem() {
-        return mIsDraggingItem;
-    }
-
-    /**
-     * @return The bounding box of where the hotseat elements are relative to this TaskbarView.
-     */
-    protected RectF getHotseatBounds() {
-        RectF result;
-        mDisableRelayout = true;
-        boolean wereHolesAllowed = mAreHolesAllowed;
-        setHolesAllowedInLayoutNoAnimation(true);
-        result = new RectF(
-                mHotseatIconsContainer.getLeft(),
-                mHotseatIconsContainer.getTop(),
-                mHotseatIconsContainer.getRight(),
-                mHotseatIconsContainer.getBottom());
-        setHolesAllowedInLayoutNoAnimation(wereHolesAllowed);
-        mDisableRelayout = false;
-
-        return result;
-    }
-
-    @Override
-    public void requestLayout() {
-        if (!mDisableRelayout) {
-            super.requestLayout();
-        }
+        int xInOurCoordinates = (int) ev.getX() - mTempOutLocation[0];
+        int yInOurCoorindates = (int) ev.getY() - mTempOutLocation[1];
+        return isShown() && mIconLayoutBounds.contains(xInOurCoordinates, yInOurCoorindates);
     }
 
     // FolderIconParent implemented methods.
@@ -421,7 +314,7 @@
     }
 
     private View inflate(@LayoutRes int layoutResId) {
-        return mActivityContext.getLayoutInflater().inflate(layoutResId, this, false);
+        return mActivityContext.getViewCache().getView(layoutResId, mActivityContext, this);
     }
 
     @Override
@@ -429,11 +322,8 @@
         // Ignore, we just implement Insettable to draw behind system insets.
     }
 
-    public void setIconsVisibility(boolean isVisible) {
-        mHotseatIconsContainer.setVisibility(isVisible ? VISIBLE : INVISIBLE);
-    }
-
     public boolean areIconsVisible() {
-        return mHotseatIconsContainer.getVisibility() == VISIBLE;
+        // Consider the overall visibility
+        return getVisibility() == VISIBLE;
     }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
new file mode 100644
index 0000000..b6184c9
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.taskbar;
+
+import android.view.View;
+
+import com.android.launcher3.util.MultiValueAlpha;
+
+/**
+ * Handles properties/data collection, then passes the results to TaskbarView to render.
+ */
+public class TaskbarViewController {
+
+    public static final int ALPHA_INDEX_HOME = 0;
+    public static final int ALPHA_INDEX_LAUNCHER_STATE = 1;
+    public static final int ALPHA_INDEX_IME = 2;
+
+    private final TaskbarActivityContext mActivity;
+    private final TaskbarView mTaskbarView;
+    private final MultiValueAlpha mTaskbarIconAlpha;
+
+    // Initialized in init.
+    private TaskbarControllers mControllers;
+
+    public TaskbarViewController(TaskbarActivityContext activity, TaskbarView taskbarView) {
+        mActivity = activity;
+        mTaskbarView = taskbarView;
+        mTaskbarIconAlpha = new MultiValueAlpha(mTaskbarView, 3);
+        mTaskbarIconAlpha.setUpdateVisibility(true);
+    }
+
+    public void init(TaskbarControllers controllers) {
+        mControllers = controllers;
+        mTaskbarView.init(new TaskbarViewCallbacks());
+        mTaskbarView.getLayoutParams().height = mActivity.getDeviceProfile().taskbarSize;
+    }
+
+    public boolean areIconsVisible() {
+        return mTaskbarView.areIconsVisible();
+    }
+
+    public MultiValueAlpha getTaskbarIconAlpha() {
+        return mTaskbarIconAlpha;
+    }
+
+    /**
+     * Should be called when the IME visibility changes, so we can make Taskbar not steal touches.
+     */
+    public void setImeIsVisible(boolean isImeVisible) {
+        mTaskbarView.setTouchesEnabled(!isImeVisible);
+    }
+
+    /**
+     * Sets OnClickListener and OnLongClickListener for the given view.
+     */
+    public void setClickAndLongClickListenersForIcon(View icon) {
+        mTaskbarView.setClickAndLongClickListenersForIcon(icon);
+    }
+
+    /**
+     * Callbacks for {@link TaskbarView} to interact with its controller.
+     */
+    public class TaskbarViewCallbacks {
+        public View.OnClickListener getOnClickListener() {
+            return mActivity::onTaskbarIconClicked;
+        }
+
+        public View.OnLongClickListener getOnLongClickListener() {
+            return mControllers.taskbarDragController::startDragOnLongClick;
+        }
+    }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/contextual/RotationButton.java b/quickstep/src/com/android/launcher3/taskbar/contextual/RotationButton.java
new file mode 100644
index 0000000..4093097
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/contextual/RotationButton.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.taskbar.contextual;
+
+import android.graphics.drawable.AnimatedVectorDrawable;
+import android.view.View;
+
+/**
+ * Interface of a rotation button that interacts {@link RotationButtonController}.
+ * This interface exists because of the two different styles of rotation button in Sysui,
+ * one in contextual for 3 button nav and a floating rotation button for gestural.
+ * Keeping the interface for eventual migration of floating button, so some methods are
+ * pass through to "super" while others are trivially implemented.
+ *
+ * Changes:
+ *  * Directly use AnimatedVectorDrawable instead of KeyButtonDrawable
+ */
+public interface RotationButton {
+    default void setRotationButtonController(RotationButtonController rotationButtonController) { }
+
+    default View getCurrentView() {
+        return null;
+    }
+    default void show() { }
+    default void hide() { }
+    default boolean isVisible() {
+        return false;
+    }
+
+    default void updateIcon(int lightIconColor, int darkIconColor) { }
+    default void setOnClickListener(View.OnClickListener onClickListener) { }
+    default void setOnHoverListener(View.OnHoverListener onHoverListener) { }
+    default AnimatedVectorDrawable getImageDrawable() {
+        return null;
+    }
+    default void setDarkIntensity(float darkIntensity) { }
+    default boolean acceptRotationProposal() {
+        return getCurrentView() != null;
+    }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/contextual/RotationButtonController.java b/quickstep/src/com/android/launcher3/taskbar/contextual/RotationButtonController.java
new file mode 100644
index 0000000..99dc282
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/contextual/RotationButtonController.java
@@ -0,0 +1,512 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.taskbar.contextual;
+
+import static android.view.Display.DEFAULT_DISPLAY;
+
+import static com.android.internal.view.RotationPolicy.NATURAL_ROTATION;
+import static com.android.launcher3.anim.Interpolators.LINEAR;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.ObjectAnimator;
+import android.annotation.ColorInt;
+import android.annotation.DrawableRes;
+import android.annotation.SuppressLint;
+import android.app.StatusBarManager;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.graphics.drawable.AnimatedVectorDrawable;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.RemoteException;
+import android.provider.Settings;
+import android.util.Log;
+import android.view.IRotationWatcher;
+import android.view.MotionEvent;
+import android.view.Surface;
+import android.view.View;
+import android.view.WindowInsetsController;
+import android.view.WindowManagerGlobal;
+import android.view.accessibility.AccessibilityManager;
+
+import com.android.internal.logging.UiEvent;
+import com.android.internal.logging.UiEventLogger;
+import com.android.internal.logging.UiEventLoggerImpl;
+import com.android.internal.view.RotationPolicy;
+import com.android.launcher3.R;
+import com.android.launcher3.util.DisplayController;
+import com.android.systemui.shared.recents.utilities.Utilities;
+import com.android.systemui.shared.recents.utilities.ViewRippler;
+import com.android.systemui.shared.system.ActivityManagerWrapper;
+import com.android.systemui.shared.system.TaskStackChangeListener;
+import com.android.systemui.shared.system.TaskStackChangeListeners;
+
+import java.util.Optional;
+
+/**
+ * Copied over from the SysUI equivalent class. Known issues/things not ported over
+ *  * When rotation button visible and in auto-hide mode, we ask auto-hide controller to
+ *    keep the navbar around longer. Will need to implement if we use auto-hide on taskbar
+ *
+ * Contains logic that deals with showing a rotate suggestion button with animation.
+ */
+public class RotationButtonController {
+
+    private static final String TAG = "StatusBar/RotationButtonController";
+    private static final int BUTTON_FADE_IN_OUT_DURATION_MS = 100;
+    private static final int NAVBAR_HIDDEN_PENDING_ICON_TIMEOUT_MS = 20000;
+
+    private static final int NUM_ACCEPTED_ROTATION_SUGGESTIONS_FOR_INTRODUCTION = 3;
+
+    private final Context mContext;
+    private final Handler mMainThreadHandler = new Handler(Looper.getMainLooper());
+    private final UiEventLogger mUiEventLogger = new UiEventLoggerImpl();
+    private final ViewRippler mViewRippler = new ViewRippler();
+    private final DisplayController mDisplayController;
+    private RotationButton mRotationButton;
+
+    private int mLastRotationSuggestion;
+    private boolean mPendingRotationSuggestion;
+    private boolean mHoveringRotationSuggestion;
+    private final AccessibilityManager mAccessibilityManager;
+    private final TaskStackListenerImpl mTaskStackListener;
+    private boolean mListenersRegistered = false;
+    private boolean mIsTaskbarShowing;
+    @SuppressLint("InlinedApi")
+    private @WindowInsetsController.Behavior
+    int mBehavior = WindowInsetsController.BEHAVIOR_DEFAULT;
+    private boolean mSkipOverrideUserLockPrefsOnce;
+    private final int mLightIconColor;
+    private final int mDarkIconColor;
+    private int mIconResId = R.drawable.ic_sysbar_rotate_button_ccw_start_90;
+
+    private final Runnable mRemoveRotationProposal =
+            () -> setRotateSuggestionButtonState(false /* visible */);
+    private final Runnable mCancelPendingRotationProposal =
+            () -> mPendingRotationSuggestion = false;
+    private Animator mRotateHideAnimator;
+
+
+    private final IRotationWatcher.Stub mRotationWatcher = new IRotationWatcher.Stub() {
+        @Override
+        public void onRotationChanged(final int rotation) {
+            // We need this to be scheduled as early as possible to beat the redrawing of
+            // window in response to the orientation change.
+            mMainThreadHandler.postAtFrontOfQueue(() -> {
+                // If the screen rotation changes while locked, potentially update lock to flow with
+                // new screen rotation and hide any showing suggestions.
+                if (isRotationLocked()) {
+                    if (shouldOverrideUserLockPrefs(rotation)) {
+                        setRotationLockedAtAngle(rotation);
+                    }
+                    setRotateSuggestionButtonState(false /* visible */, true /* forced */);
+                }
+            });
+        }
+    };
+
+    /**
+     * Determines if rotation suggestions disabled2 flag exists in flag
+     * @param disable2Flags see if rotation suggestion flag exists in this flag
+     * @return whether flag exists
+     */
+    static boolean hasDisable2RotateSuggestionFlag(int disable2Flags) {
+        return (disable2Flags & StatusBarManager.DISABLE2_ROTATE_SUGGESTIONS) != 0;
+    }
+
+    public RotationButtonController(Context context, @ColorInt int lightIconColor,
+            @ColorInt int darkIconColor) {
+        mContext = context;
+        mLightIconColor = lightIconColor;
+        mDarkIconColor = darkIconColor;
+
+        mAccessibilityManager = AccessibilityManager.getInstance(context);
+        mTaskStackListener = new TaskStackListenerImpl();
+        mDisplayController = DisplayController.INSTANCE.get(context);
+    }
+
+    public void setRotationButton(RotationButton rotationButton) {
+        mRotationButton = rotationButton;
+        mRotationButton.setRotationButtonController(this);
+        mRotationButton.setOnClickListener(this::onRotateSuggestionClick);
+        mRotationButton.setOnHoverListener(this::onRotateSuggestionHover);
+    }
+
+    public void init() {
+        registerListeners();
+        if (mDisplayController.getInfo().id != DEFAULT_DISPLAY) {
+            // Currently there is no accelerometer sensor on non-default display, disable fixed
+            // rotation for non-default display
+            onDisable2FlagChanged(StatusBarManager.DISABLE2_ROTATE_SUGGESTIONS);
+        }
+    }
+
+    public void onDestroy() {
+        unregisterListeners();
+    }
+
+    private void registerListeners() {
+        if (mListenersRegistered) {
+            return;
+        }
+
+        mListenersRegistered = true;
+        try {
+            WindowManagerGlobal.getWindowManagerService()
+                    .watchRotation(mRotationWatcher, mDisplayController.getInfo().id);
+        } catch (IllegalArgumentException e) {
+            mListenersRegistered = false;
+            Log.w(TAG, "RegisterListeners for the display failed");
+        } catch (RemoteException e) {
+            Log.e(TAG, "RegisterListeners caught a RemoteException", e);
+            return;
+        }
+
+        TaskStackChangeListeners.getInstance().registerTaskStackListener(mTaskStackListener);
+    }
+
+    void unregisterListeners() {
+        if (!mListenersRegistered) {
+            return;
+        }
+
+        mListenersRegistered = false;
+        try {
+            WindowManagerGlobal.getWindowManagerService().removeRotationWatcher(mRotationWatcher);
+        } catch (RemoteException e) {
+            Log.e(TAG, "UnregisterListeners caught a RemoteException", e);
+            return;
+        }
+
+        TaskStackChangeListeners.getInstance().unregisterTaskStackListener(mTaskStackListener);
+    }
+
+    void setRotationLockedAtAngle(int rotationSuggestion) {
+        RotationPolicy.setRotationLockAtAngle(mContext, true, rotationSuggestion);
+    }
+
+    public boolean isRotationLocked() {
+        return RotationPolicy.isRotationLocked(mContext);
+    }
+
+    public void setRotateSuggestionButtonState(boolean visible) {
+        setRotateSuggestionButtonState(visible, false /* force */);
+    }
+
+    void setRotateSuggestionButtonState(final boolean visible, final boolean force) {
+        // At any point the button can become invisible because an a11y service became active.
+        // Similarly, a call to make the button visible may be rejected because an a11y service is
+        // active. Must account for this.
+        // Rerun a show animation to indicate change but don't rerun a hide animation
+        if (!visible && !mRotationButton.isVisible()) return;
+
+        final View view = mRotationButton.getCurrentView();
+        if (view == null) return;
+
+        final AnimatedVectorDrawable currentDrawable = mRotationButton.getImageDrawable();
+        if (currentDrawable == null) return;
+
+        // Clear any pending suggestion flag as it has either been nullified or is being shown
+        mPendingRotationSuggestion = false;
+        mMainThreadHandler.removeCallbacks(mCancelPendingRotationProposal);
+
+        // Handle the visibility change and animation
+        if (visible) { // Appear and change (cannot force)
+            // Stop and clear any currently running hide animations
+            if (mRotateHideAnimator != null && mRotateHideAnimator.isRunning()) {
+                mRotateHideAnimator.cancel();
+            }
+            mRotateHideAnimator = null;
+
+            // Reset the alpha if any has changed due to hide animation
+            view.setAlpha(1f);
+
+            // Run the rotate icon's animation if it has one
+            currentDrawable.reset();
+            currentDrawable.start();
+
+            // TODO(b/187754252): No idea why this doesn't work. If we remove the "false"
+            //  we see the animation show the pressed state... but it only shows the first time.
+            if (!isRotateSuggestionIntroduced()) mViewRippler.start(view);
+
+            // Set visibility unless a11y service is active.
+            mRotationButton.show();
+        } else { // Hide
+            mViewRippler.stop(); // Prevent any pending ripples, force hide or not
+
+            if (force) {
+                // If a hide animator is running stop it and make invisible
+                if (mRotateHideAnimator != null && mRotateHideAnimator.isRunning()) {
+                    mRotateHideAnimator.pause();
+                }
+                mRotationButton.hide();
+                return;
+            }
+
+            // Don't start any new hide animations if one is running
+            if (mRotateHideAnimator != null && mRotateHideAnimator.isRunning()) return;
+
+            ObjectAnimator fadeOut = ObjectAnimator.ofFloat(view, "alpha", 0f);
+            fadeOut.setDuration(BUTTON_FADE_IN_OUT_DURATION_MS);
+            fadeOut.setInterpolator(LINEAR);
+            fadeOut.addListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    mRotationButton.hide();
+                }
+            });
+
+            mRotateHideAnimator = fadeOut;
+            fadeOut.start();
+        }
+    }
+
+    void setDarkIntensity(float darkIntensity) {
+        mRotationButton.setDarkIntensity(darkIntensity);
+    }
+
+    public void onRotationProposal(int rotation, boolean isValid) {
+        int windowRotation = mDisplayController.getInfo().rotation;
+
+        if (!mRotationButton.acceptRotationProposal()) {
+            return;
+        }
+
+        // This method will be called on rotation suggestion changes even if the proposed rotation
+        // is not valid for the top app. Use invalid rotation choices as a signal to remove the
+        // rotate button if shown.
+        if (!isValid) {
+            setRotateSuggestionButtonState(false /* visible */);
+            return;
+        }
+
+        // If window rotation matches suggested rotation, remove any current suggestions
+        if (rotation == windowRotation) {
+            mMainThreadHandler.removeCallbacks(mRemoveRotationProposal);
+            setRotateSuggestionButtonState(false /* visible */);
+            return;
+        }
+
+        // Prepare to show the navbar icon by updating the icon style to change anim params
+        mLastRotationSuggestion = rotation; // Remember rotation for click
+        final boolean rotationCCW = Utilities.isRotationAnimationCCW(windowRotation, rotation);
+        if (windowRotation == Surface.ROTATION_0 || windowRotation == Surface.ROTATION_180) {
+            mIconResId = rotationCCW
+                    ? R.drawable.ic_sysbar_rotate_button_ccw_start_90
+                    : R.drawable.ic_sysbar_rotate_button_cw_start_90;
+        } else { // 90 or 270
+            mIconResId = rotationCCW
+                    ? R.drawable.ic_sysbar_rotate_button_ccw_start_0
+                    : R.drawable.ic_sysbar_rotate_button_ccw_start_0;
+        }
+        mRotationButton.updateIcon(mLightIconColor, mDarkIconColor);
+
+        if (canShowRotationButton()) {
+            // The navbar is visible / it's in visual immersive mode, so show the icon right away
+            showAndLogRotationSuggestion();
+        } else {
+            // If the navbar isn't shown, flag the rotate icon to be shown should the navbar become
+            // visible given some time limit.
+            mPendingRotationSuggestion = true;
+            mMainThreadHandler.removeCallbacks(mCancelPendingRotationProposal);
+            mMainThreadHandler.postDelayed(mCancelPendingRotationProposal,
+                    NAVBAR_HIDDEN_PENDING_ICON_TIMEOUT_MS);
+        }
+    }
+
+    public void onDisable2FlagChanged(int state2) {
+        final boolean rotateSuggestionsDisabled = hasDisable2RotateSuggestionFlag(state2);
+        if (rotateSuggestionsDisabled) onRotationSuggestionsDisabled();
+    }
+
+    public void onBehaviorChanged(int displayId, @WindowInsetsController.Behavior int behavior) {
+        if (mDisplayController.getInfo().id != displayId) {
+            return;
+        }
+
+        if (mBehavior != behavior) {
+            mBehavior = behavior;
+            showPendingRotationButtonIfNeeded();
+        }
+    }
+
+    public void onTaskBarVisibilityChange(boolean showing) {
+        if (mIsTaskbarShowing != showing) {
+            mIsTaskbarShowing = showing;
+            showPendingRotationButtonIfNeeded();
+        }
+    }
+
+    private void showPendingRotationButtonIfNeeded() {
+        if (canShowRotationButton() && mPendingRotationSuggestion) {
+            showAndLogRotationSuggestion();
+        }
+    }
+
+    /** Return true when either the task bar is visible or it's in visual immersive mode. */
+    @SuppressLint("InlinedApi")
+    private boolean canShowRotationButton() {
+        return mIsTaskbarShowing || mBehavior == WindowInsetsController.BEHAVIOR_DEFAULT;
+    }
+
+    public @DrawableRes
+    int getIconResId() {
+        return mIconResId;
+    }
+
+    public @ColorInt int getLightIconColor() {
+        return mLightIconColor;
+    }
+
+    public @ColorInt int getDarkIconColor() {
+        return mDarkIconColor;
+    }
+
+    private void onRotateSuggestionClick(View v) {
+        mUiEventLogger.log(RotationButtonEvent.ROTATION_SUGGESTION_ACCEPTED);
+        incrementNumAcceptedRotationSuggestionsIfNeeded();
+        setRotationLockedAtAngle(mLastRotationSuggestion);
+    }
+
+    private boolean onRotateSuggestionHover(View v, MotionEvent event) {
+        final int action = event.getActionMasked();
+        mHoveringRotationSuggestion = (action == MotionEvent.ACTION_HOVER_ENTER)
+                || (action == MotionEvent.ACTION_HOVER_MOVE);
+        rescheduleRotationTimeout(true /* reasonHover */);
+        return false; // Must return false so a11y hover events are dispatched correctly.
+    }
+
+    private void onRotationSuggestionsDisabled() {
+        // Immediately hide the rotate button and clear any planned removal
+        setRotateSuggestionButtonState(false /* visible */, true /* force */);
+        mMainThreadHandler.removeCallbacks(mRemoveRotationProposal);
+    }
+
+    private void showAndLogRotationSuggestion() {
+        setRotateSuggestionButtonState(true /* visible */);
+        rescheduleRotationTimeout(false /* reasonHover */);
+        mUiEventLogger.log(RotationButtonEvent.ROTATION_SUGGESTION_SHOWN);
+    }
+
+    /**
+     * Makes {@link #shouldOverrideUserLockPrefs} always return {@code false} once. It is used to
+     * avoid losing original user rotation when display rotation is changed by entering the fixed
+     * orientation overview.
+     */
+    void setSkipOverrideUserLockPrefsOnce() {
+        mSkipOverrideUserLockPrefsOnce = true;
+    }
+
+    private boolean shouldOverrideUserLockPrefs(final int rotation) {
+        if (mSkipOverrideUserLockPrefsOnce) {
+            mSkipOverrideUserLockPrefsOnce = false;
+            return false;
+        }
+        // Only override user prefs when returning to the natural rotation (normally portrait).
+        // Don't let apps that force landscape or 180 alter user lock.
+        return rotation == NATURAL_ROTATION;
+    }
+
+    private void rescheduleRotationTimeout(final boolean reasonHover) {
+        // May be called due to a new rotation proposal or a change in hover state
+        if (reasonHover) {
+            // Don't reschedule if a hide animator is running
+            if (mRotateHideAnimator != null && mRotateHideAnimator.isRunning()) return;
+            // Don't reschedule if not visible
+            if (!mRotationButton.isVisible()) return;
+        }
+
+        // Stop any pending removal
+        mMainThreadHandler.removeCallbacks(mRemoveRotationProposal);
+        // Schedule timeout
+        mMainThreadHandler.postDelayed(mRemoveRotationProposal,
+                computeRotationProposalTimeout());
+    }
+
+    private int computeRotationProposalTimeout() {
+        return mAccessibilityManager.getRecommendedTimeoutMillis(
+                mHoveringRotationSuggestion ? 16000 : 5000,
+                AccessibilityManager.FLAG_CONTENT_CONTROLS);
+    }
+
+    private boolean isRotateSuggestionIntroduced() {
+        ContentResolver cr = mContext.getContentResolver();
+        return Settings.Secure.getInt(cr, Settings.Secure.NUM_ROTATION_SUGGESTIONS_ACCEPTED, 0)
+                >= NUM_ACCEPTED_ROTATION_SUGGESTIONS_FOR_INTRODUCTION;
+    }
+
+    private void incrementNumAcceptedRotationSuggestionsIfNeeded() {
+        // Get the number of accepted suggestions
+        ContentResolver cr = mContext.getContentResolver();
+        final int numSuggestions = Settings.Secure.getInt(cr,
+                Settings.Secure.NUM_ROTATION_SUGGESTIONS_ACCEPTED, 0);
+
+        // Increment the number of accepted suggestions only if it would change intro mode
+        if (numSuggestions < NUM_ACCEPTED_ROTATION_SUGGESTIONS_FOR_INTRODUCTION) {
+            Settings.Secure.putInt(cr, Settings.Secure.NUM_ROTATION_SUGGESTIONS_ACCEPTED,
+                    numSuggestions + 1);
+        }
+    }
+
+    private class TaskStackListenerImpl extends TaskStackChangeListener {
+        // Invalidate any rotation suggestion on task change or activity orientation change
+        // Note: all callbacks happen on main thread
+
+        @Override
+        public void onTaskStackChanged() {
+            setRotateSuggestionButtonState(false /* visible */);
+        }
+
+        @Override
+        public void onTaskRemoved(int taskId) {
+            setRotateSuggestionButtonState(false /* visible */);
+        }
+
+        @Override
+        public void onTaskMovedToFront(int taskId) {
+            setRotateSuggestionButtonState(false /* visible */);
+        }
+
+        @Override
+        public void onActivityRequestedOrientationChanged(int taskId, int requestedOrientation) {
+            // Only hide the icon if the top task changes its requestedOrientation
+            // Launcher can alter its requestedOrientation while it's not on top, don't hide on this
+            Optional.ofNullable(ActivityManagerWrapper.getInstance())
+                    .map(ActivityManagerWrapper::getRunningTask)
+                    .ifPresent(a -> {
+                        if (a.id == taskId) setRotateSuggestionButtonState(false /* visible */);
+                    });
+        }
+    }
+
+    enum RotationButtonEvent implements UiEventLogger.UiEventEnum {
+        @UiEvent(doc = "The rotation button was shown")
+        ROTATION_SUGGESTION_SHOWN(206),
+        @UiEvent(doc = "The rotation button was clicked")
+        ROTATION_SUGGESTION_ACCEPTED(207);
+
+        private final int mId;
+        RotationButtonEvent(int id) {
+            mId = id;
+        }
+        @Override public int getId() {
+            return mId;
+        }
+    }
+}
+
diff --git a/quickstep/src/com/android/launcher3/uioverrides/ApiWrapper.java b/quickstep/src/com/android/launcher3/uioverrides/ApiWrapper.java
index 76a5782..a595f54 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/ApiWrapper.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/ApiWrapper.java
@@ -17,10 +17,15 @@
 package com.android.launcher3.uioverrides;
 
 import android.app.Person;
+import android.content.Context;
 import android.content.pm.ShortcutInfo;
+import android.content.res.Resources;
 import android.view.Display;
 
+import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
+import com.android.quickstep.SysUINavigationMode;
+import com.android.quickstep.SysUINavigationMode.Mode;
 
 public class ApiWrapper {
 
@@ -37,4 +42,18 @@
     public static boolean isInternalDisplay(Display display) {
         return display.getType() == Display.TYPE_INTERNAL;
     }
+
+    /**
+     * Returns the minimum space that should be left empty at the start of hotseat
+     */
+    public static int getHotseatStartOffset(Context context) {
+        if (SysUINavigationMode.INSTANCE.get(context).getMode() == Mode.THREE_BUTTONS) {
+            Resources res = context.getResources();
+            return 2 * res.getDimensionPixelSize(R.dimen.taskbar_nav_buttons_spacing)
+                    + 3 * res.getDimensionPixelSize(R.dimen.taskbar_nav_buttons_size);
+        } else {
+            return 0;
+        }
+
+    }
 }
diff --git a/quickstep/src/com/android/launcher3/uioverrides/BaseRecentsViewStateController.java b/quickstep/src/com/android/launcher3/uioverrides/BaseRecentsViewStateController.java
index 1d52315..d74b6c5 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/BaseRecentsViewStateController.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/BaseRecentsViewStateController.java
@@ -17,6 +17,8 @@
 package com.android.launcher3.uioverrides;
 
 import static com.android.launcher3.anim.Interpolators.AGGRESSIVE_EASE_IN_OUT;
+import static com.android.launcher3.anim.Interpolators.FINAL_FRAME;
+import static com.android.launcher3.anim.Interpolators.INSTANT;
 import static com.android.launcher3.anim.Interpolators.LINEAR;
 import static com.android.launcher3.states.StateAnimationConfig.ANIM_OVERVIEW_FADE;
 import static com.android.launcher3.states.StateAnimationConfig.ANIM_OVERVIEW_MODAL;
@@ -112,8 +114,9 @@
                 mRecentsView, getTaskModalnessProperty(),
                 toState.getOverviewModalness(),
                 config.getInterpolator(ANIM_OVERVIEW_MODAL, LINEAR));
-        setter.setFloat(mRecentsView, RECENTS_GRID_PROGRESS,
-                toState.displayOverviewTasksAsGrid(mLauncher.getDeviceProfile()) ? 1f : 0f, LINEAR);
+        boolean showAsGrid = toState.displayOverviewTasksAsGrid(mLauncher.getDeviceProfile());
+        setter.setFloat(mRecentsView, RECENTS_GRID_PROGRESS, showAsGrid ? 1f : 0f,
+                showAsGrid ? INSTANT : FINAL_FRAME);
     }
 
     abstract FloatProperty getTaskModalnessProperty();
diff --git a/quickstep/src/com/android/launcher3/uioverrides/RecentsViewStateController.java b/quickstep/src/com/android/launcher3/uioverrides/RecentsViewStateController.java
index 996d36a..6cad3dd 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/RecentsViewStateController.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/RecentsViewStateController.java
@@ -106,8 +106,7 @@
         float clearAllButtonAlpha = state.areElementsVisible(mLauncher, CLEAR_ALL_BUTTON) ? 1 : 0;
         propertySetter.setFloat(mRecentsView.getClearAllButton(), ClearAllButton.VISIBILITY_ALPHA,
                 clearAllButtonAlpha, LINEAR);
-        float overviewButtonAlpha = state.areElementsVisible(mLauncher, OVERVIEW_ACTIONS)
-                && mRecentsView.shouldShowOverviewActionsForState(state) ? 1 : 0;
+        float overviewButtonAlpha = state.areElementsVisible(mLauncher, OVERVIEW_ACTIONS) ? 1 : 0;
         propertySetter.setFloat(mLauncher.getActionsView().getVisibilityAlpha(),
                 MultiValueAlpha.VALUE, overviewButtonAlpha, config.getInterpolator(
                         ANIM_OVERVIEW_ACTIONS_FADE, LINEAR));
diff --git a/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java b/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java
index 8c128c8..90e17c0 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java
@@ -83,16 +83,6 @@
     }
 
     @Override
-    public float getTaskbarScale(Launcher launcher) {
-        return 1f;
-    }
-
-    @Override
-    public float getTaskbarTranslationY(Launcher launcher) {
-        return 0f;
-    }
-
-    @Override
     public PageAlphaProvider getWorkspacePageAlphaProvider(Launcher launcher) {
         return new PageAlphaProvider(DEACCEL_2) {
             @Override
diff --git a/quickstep/src/com/android/quickstep/BaseActivityInterface.java b/quickstep/src/com/android/quickstep/BaseActivityInterface.java
index 7ab371b..a45ced4 100644
--- a/quickstep/src/com/android/quickstep/BaseActivityInterface.java
+++ b/quickstep/src/com/android/quickstep/BaseActivityInterface.java
@@ -211,17 +211,18 @@
             Rect gridRect = new Rect();
             calculateGridSize(context, dp, gridRect);
 
-            int verticalMargin = res.getDimensionPixelSize(
-                    R.dimen.overview_grid_focus_vertical_margin);
-            float taskHeight = gridRect.height() - verticalMargin * 2;
+            int verticalMargin = Math.max(
+                    res.getDimensionPixelSize(R.dimen.overview_grid_focus_vertical_margin),
+                    res.getDimensionPixelSize(R.dimen.overview_actions_height));
+            float taskHeight =
+                    gridRect.height() - verticalMargin * 2 - dp.overviewTaskThumbnailTopMarginPx;
 
             PointF taskDimension = getTaskDimension(context, dp);
-            float scale = taskHeight / Math.max(taskDimension.x, taskDimension.y);
+            float scale = taskHeight / taskDimension.y;
             int outWidth = Math.round(scale * taskDimension.x);
             int outHeight = Math.round(scale * taskDimension.y);
 
-            int gravity = Gravity.CENTER_VERTICAL;
-            gravity |= orientedState.getRecentsRtlSetting(res) ? Gravity.RIGHT : Gravity.LEFT;
+            int gravity = Gravity.CENTER;
             Gravity.apply(gravity, outWidth, outHeight, gridRect, outRect);
         } else {
             int taskMargin = dp.overviewTaskMarginPx;
@@ -310,8 +311,7 @@
         float rowHeight = (gridRect.height() - rowSpacing) / 2f;
 
         PointF taskDimension = getTaskDimension(context, dp);
-        float scale = (rowHeight - dp.overviewTaskThumbnailTopMarginPx) / Math.max(
-                taskDimension.x, taskDimension.y);
+        float scale = (rowHeight - dp.overviewTaskThumbnailTopMarginPx) / taskDimension.y;
         int outWidth = Math.round(scale * taskDimension.x);
         int outHeight = Math.round(scale * taskDimension.y);
 
diff --git a/quickstep/src/com/android/quickstep/SystemUiProxy.java b/quickstep/src/com/android/quickstep/SystemUiProxy.java
index d040904..090fd01 100644
--- a/quickstep/src/com/android/quickstep/SystemUiProxy.java
+++ b/quickstep/src/com/android/quickstep/SystemUiProxy.java
@@ -85,6 +85,7 @@
     private float mLastNavButtonAlpha;
     private boolean mLastNavButtonAnimate;
     private boolean mHasNavButtonAlphaBeenSet = false;
+    private Runnable mPendingSetNavButtonAlpha = null;
 
     // TODO(141886704): Find a way to remove this
     private int mLastSystemUiStateFlags;
@@ -157,6 +158,11 @@
             setSmartspaceCallback(mPendingSmartspaceCallback);
             mPendingSmartspaceCallback = null;
         }
+
+        if (mPendingSetNavButtonAlpha != null) {
+            mPendingSetNavButtonAlpha.run();
+            mPendingSetNavButtonAlpha = null;
+        }
     }
 
     public void clearProxy() {
@@ -240,14 +246,18 @@
         boolean changed = Float.compare(alpha, mLastNavButtonAlpha) != 0
                 || animate != mLastNavButtonAnimate
                 || !mHasNavButtonAlphaBeenSet;
-        if (mSystemUiProxy != null && changed) {
-            mLastNavButtonAlpha = alpha;
-            mLastNavButtonAnimate = animate;
-            mHasNavButtonAlphaBeenSet = true;
-            try {
-                mSystemUiProxy.setNavBarButtonAlpha(alpha, animate);
-            } catch (RemoteException e) {
-                Log.w(TAG, "Failed call setNavBarButtonAlpha", e);
+        if (changed) {
+            if (mSystemUiProxy == null) {
+                mPendingSetNavButtonAlpha = () -> setNavBarButtonAlpha(alpha, animate);
+            } else {
+                mLastNavButtonAlpha = alpha;
+                mLastNavButtonAnimate = animate;
+                mHasNavButtonAlphaBeenSet = true;
+                try {
+                    mSystemUiProxy.setNavBarButtonAlpha(alpha, animate);
+                } catch (RemoteException e) {
+                    Log.w(TAG, "Failed call setNavBarButtonAlpha", e);
+                }
             }
         }
     }
diff --git a/quickstep/src/com/android/quickstep/TaskOverlayFactory.java b/quickstep/src/com/android/quickstep/TaskOverlayFactory.java
index c1c85de..7297107 100644
--- a/quickstep/src/com/android/quickstep/TaskOverlayFactory.java
+++ b/quickstep/src/com/android/quickstep/TaskOverlayFactory.java
@@ -68,13 +68,14 @@
         final BaseDraggingActivity activity = BaseActivity.fromContext(taskView.getContext());
         for (TaskShortcutFactory menuOption : MENU_OPTIONS) {
             SystemShortcut shortcut = menuOption.getShortcut(activity, taskView);
-            if (menuOption == TaskShortcutFactory.SPLIT_SCREEN &&
-                    FeatureFlags.ENABLE_SPLIT_SELECT.get()) {
-                addSplitOptions(shortcuts, activity, taskView, deviceProfile);
+            if (shortcut == null) {
                 continue;
             }
 
-            if (shortcut != null) {
+            if (menuOption == TaskShortcutFactory.SPLIT_SCREEN &&
+                    FeatureFlags.ENABLE_SPLIT_SELECT.get()) {
+                addSplitOptions(shortcuts, activity, taskView, deviceProfile);
+            } else {
                 shortcuts.add(shortcut);
             }
         }
diff --git a/quickstep/src/com/android/quickstep/TouchInteractionService.java b/quickstep/src/com/android/quickstep/TouchInteractionService.java
index e52405b..a3136c7 100644
--- a/quickstep/src/com/android/quickstep/TouchInteractionService.java
+++ b/quickstep/src/com/android/quickstep/TouchInteractionService.java
@@ -261,16 +261,35 @@
         }
 
         @Override
-        public void onSplitScreenSecondaryBoundsChanged(Rect bounds, Rect insets)  {
+        public void onSplitScreenSecondaryBoundsChanged(Rect bounds, Rect insets) {
             WindowBounds wb = new WindowBounds(bounds, insets);
             MAIN_EXECUTOR.execute(() -> SplitScreenBounds.INSTANCE.setSecondaryWindowBounds(wb));
         }
 
         @Override
-        public void onImeWindowStatusChanged(int displayId, IBinder token, int vis,
-                int backDisposition, boolean showImeSwitcher) {
-            MAIN_EXECUTOR.execute(() -> mTaskbarManager.updateImeStatus(
-                    displayId, vis, backDisposition, showImeSwitcher));
+        public void onRotationProposal(int rotation, boolean isValid) {
+            executeForTaskbarManager(() -> mTaskbarManager.onRotationProposal(rotation, isValid));
+        }
+
+        @Override
+        public void disable(int displayId, int state1, int state2, boolean animate) {
+            executeForTaskbarManager(() -> mTaskbarManager
+                    .disable(displayId, state1, state2, animate));
+        }
+
+        @Override
+        public void onSystemBarAttributesChanged(int displayId, int behavior) {
+            executeForTaskbarManager(() -> mTaskbarManager
+                    .onSystemBarAttributesChanged(displayId, behavior));
+        }
+
+        private void executeForTaskbarManager(final Runnable r) {
+            MAIN_EXECUTOR.execute(() -> {
+                if (mTaskbarManager == null) {
+                    return;
+                }
+                r.run();
+            });
         }
 
         public TaskbarManager getTaskbarManager() {
diff --git a/quickstep/src/com/android/quickstep/fallback/FallbackRecentsStateController.java b/quickstep/src/com/android/quickstep/fallback/FallbackRecentsStateController.java
index f0364eb..50b69dc 100644
--- a/quickstep/src/com/android/quickstep/fallback/FallbackRecentsStateController.java
+++ b/quickstep/src/com/android/quickstep/fallback/FallbackRecentsStateController.java
@@ -15,6 +15,8 @@
  */
 package com.android.quickstep.fallback;
 
+import static com.android.launcher3.anim.Interpolators.FINAL_FRAME;
+import static com.android.launcher3.anim.Interpolators.INSTANT;
 import static com.android.launcher3.anim.Interpolators.LINEAR;
 import static com.android.launcher3.states.StateAnimationConfig.ANIM_OVERVIEW_MODAL;
 import static com.android.launcher3.states.StateAnimationConfig.ANIM_OVERVIEW_SCALE;
@@ -77,9 +79,7 @@
         float clearAllButtonAlpha = state.hasClearAllButton() ? 1 : 0;
         setter.setFloat(mRecentsView.getClearAllButton(), ClearAllButton.VISIBILITY_ALPHA,
                 clearAllButtonAlpha, LINEAR);
-        float overviewButtonAlpha =
-                state.hasOverviewActions() && mRecentsView.shouldShowOverviewActionsForState(state)
-                        ? 1 : 0;
+        float overviewButtonAlpha = state.hasOverviewActions() ? 1 : 0;
         setter.setFloat(mActivity.getActionsView().getVisibilityAlpha(),
                 MultiValueAlpha.VALUE, overviewButtonAlpha, LINEAR);
 
@@ -94,8 +94,9 @@
         setter.setFloat(mRecentsView, TASK_MODALNESS, state.getOverviewModalness(),
                 config.getInterpolator(ANIM_OVERVIEW_MODAL, LINEAR));
         setter.setFloat(mRecentsView, FULLSCREEN_PROGRESS, state.isFullScreen() ? 1 : 0, LINEAR);
-        setter.setFloat(mRecentsView, RECENTS_GRID_PROGRESS,
-                state.displayOverviewTasksAsGrid(mActivity.getDeviceProfile()) ? 1f : 0f, LINEAR);
+        boolean showAsGrid = state.displayOverviewTasksAsGrid(mActivity.getDeviceProfile());
+        setter.setFloat(mRecentsView, RECENTS_GRID_PROGRESS, showAsGrid ? 1f : 0f,
+                showAsGrid ? INSTANT : FINAL_FRAME);
 
         setter.setViewBackgroundColor(mActivity.getScrimView(), state.getScrimColor(mActivity),
                 config.getInterpolator(ANIM_SCRIM_FADE, LINEAR));
diff --git a/quickstep/src/com/android/quickstep/fallback/FallbackRecentsView.java b/quickstep/src/com/android/quickstep/fallback/FallbackRecentsView.java
index ac3fb27..efce650 100644
--- a/quickstep/src/com/android/quickstep/fallback/FallbackRecentsView.java
+++ b/quickstep/src/com/android/quickstep/fallback/FallbackRecentsView.java
@@ -26,14 +26,12 @@
 import android.content.Context;
 import android.os.Build;
 import android.util.AttributeSet;
-import android.util.Log;
 
 import androidx.annotation.Nullable;
 
 import com.android.launcher3.anim.AnimatorPlaybackController;
 import com.android.launcher3.anim.PendingAnimation;
 import com.android.launcher3.statemanager.StateManager.StateListener;
-import com.android.launcher3.testing.TestProtocol;
 import com.android.quickstep.FallbackActivityInterface;
 import com.android.quickstep.GestureState;
 import com.android.quickstep.RecentsActivity;
@@ -122,6 +120,12 @@
         }
     }
 
+    @Nullable
+    @Override
+    protected TaskView getHomeTaskView() {
+        return mHomeTaskInfo != null ? getTaskView(mHomeTaskInfo.taskId) : null;
+    }
+
     @Override
     protected boolean shouldAddStubTaskView(RunningTaskInfo runningTaskInfo) {
         if (mHomeTaskInfo != null && runningTaskInfo != null &&
diff --git a/quickstep/src/com/android/quickstep/util/AnimatorControllerWithResistance.java b/quickstep/src/com/android/quickstep/util/AnimatorControllerWithResistance.java
index 7f94839..f1b4e3d 100644
--- a/quickstep/src/com/android/quickstep/util/AnimatorControllerWithResistance.java
+++ b/quickstep/src/com/android/quickstep/util/AnimatorControllerWithResistance.java
@@ -49,6 +49,7 @@
 
     private enum RecentsResistanceParams {
         FROM_APP(0.75f, 0.5f, 1f),
+        FROM_APP_TABLET(0.9f, 0.75f, 1f),
         FROM_OVERVIEW(1f, 0.75f, 0.5f);
 
         RecentsResistanceParams(float scaleStartResist, float scaleMaxResist,
@@ -228,7 +229,7 @@
 
         // These are not required, or can have a default value that is generally correct.
         @Nullable public PendingAnimation resistAnim = null;
-        public RecentsResistanceParams resistanceParams = RecentsResistanceParams.FROM_APP;
+        public RecentsResistanceParams resistanceParams;
         public float startScale = 1f;
         public float startTranslation = 0f;
 
@@ -242,6 +243,11 @@
             this.scaleProperty = scaleProperty;
             this.translationTarget = translationTarget;
             this.translationProperty = translationProperty;
+            if (dp.isTablet) {
+                resistanceParams = RecentsResistanceParams.FROM_APP_TABLET;
+            } else {
+                resistanceParams = RecentsResistanceParams.FROM_APP;
+            }
         }
 
         private RecentsParams setResistAnim(PendingAnimation resistAnim) {
diff --git a/quickstep/src/com/android/quickstep/util/TaskViewSimulator.java b/quickstep/src/com/android/quickstep/util/TaskViewSimulator.java
index b15bbf3..0e6ce87 100644
--- a/quickstep/src/com/android/quickstep/util/TaskViewSimulator.java
+++ b/quickstep/src/com/android/quickstep/util/TaskViewSimulator.java
@@ -256,8 +256,8 @@
 
         float fullScreenProgress = Utilities.boundToRange(this.fullScreenProgress.value, 0, 1);
         mCurrentFullscreenParams.setProgress(
-                fullScreenProgress, recentsViewScale.value, mTaskRect.width(), mDp,
-                mPositionHelper);
+                fullScreenProgress, recentsViewScale.value, /*taskViewScale=*/1f, mTaskRect.width(),
+                mDp, mPositionHelper);
 
         // Apply thumbnail matrix
         RectF insets = mCurrentFullscreenParams.mCurrentDrawnInsets;
diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index df7f8b5..45bcc87 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -32,7 +32,6 @@
 import static com.android.launcher3.Utilities.squaredHypot;
 import static com.android.launcher3.Utilities.squaredTouchSlop;
 import static com.android.launcher3.anim.Interpolators.ACCEL;
-import static com.android.launcher3.anim.Interpolators.ACCEL_0_5;
 import static com.android.launcher3.anim.Interpolators.ACCEL_0_75;
 import static com.android.launcher3.anim.Interpolators.ACCEL_DEACCEL;
 import static com.android.launcher3.anim.Interpolators.FAST_OUT_SLOW_IN;
@@ -345,6 +344,9 @@
     private static final int ADDITION_TASK_DURATION = 200;
     private static final float INITIAL_DISMISS_TRANSLATION_INTERPOLATION_OFFSET = 0.55f;
     private static final float ADDITIONAL_DISMISS_TRANSLATION_INTERPOLATION_OFFSET = 0.05f;
+    private static final float ANIMATION_DISMISS_PROGRESS_MIDPOINT = 0.5f;
+
+    private static final float SIGNIFICANT_MOVE_THRESHOLD_TABLET = 0.15f;
 
     protected final RecentsOrientedState mOrientationState;
     protected final BaseActivityInterface<STATE_TYPE, ACTIVITY_TYPE> mSizeStrategy;
@@ -352,6 +354,13 @@
     protected SurfaceTransactionApplier mSyncTransactionApplier;
     protected int mTaskWidth;
     protected int mTaskHeight;
+    // Used to position the top of a task in the top row of the grid
+    private float mTaskGridVerticalDiff;
+    // The vertical space one grid task takes + space between top and bottom row.
+    private float mTopBottomRowHeightDiff;
+    // mTaskGridVerticalDiff and mTopBottomRowHeightDiff summed together provides the top
+    // position for bottom row of grid tasks.
+
     protected final TransformParams mLiveTileParams = new TransformParams();
     protected final TaskViewSimulator mLiveTileTaskViewSimulator;
     protected final Rect mLastComputedTaskSize = new Rect();
@@ -364,6 +373,7 @@
     protected final Rect mTempRect = new Rect();
     protected final RectF mTempRectF = new RectF();
     private final PointF mTempPointF = new PointF();
+    private final Matrix mTempMatrix = new Matrix();
     private final float[] mTempFloat = new float[1];
     private final List<OnScrollChangedListener> mScrollListeners = new ArrayList<>();
 
@@ -492,9 +502,8 @@
     protected boolean mRunningTaskTileHidden;
     private Task mTmpRunningTask;
     protected int mFocusedTaskId = -1;
-    private float mFocusedTaskRatio;
 
-    private boolean mRunningTaskIconScaledDown = false;
+    private boolean mTaskIconScaledDown = false;
 
     private boolean mOverviewStateEnabled;
     private boolean mHandleTaskStackChanges;
@@ -817,7 +826,7 @@
         // taskview for entering split screen, we only pretend to dismiss the task
         if (child instanceof TaskView && child != mSplitHiddenTaskView) {
             TaskView taskView = (TaskView) child;
-            mHasVisibleTaskData.delete(taskView.getTask().key.id);
+            mHasVisibleTaskData.delete(taskView.getTaskId());
             mTaskViewPool.recycle(taskView);
             mActionsView.updateHiddenFlags(HIDDEN_NO_TASKS, getTaskViewCount() == 0);
         }
@@ -924,7 +933,7 @@
     public TaskView getTaskView(int taskId) {
         for (int i = 0; i < getTaskViewCount(); i++) {
             TaskView taskView = getTaskViewAt(i);
-            if (taskView.hasTaskId(taskId)) {
+            if (taskView.getTaskId() == taskId) {
                 return taskView;
             }
         }
@@ -974,6 +983,12 @@
     }
 
     @Override
+    protected float getSignificantMoveThreshold() {
+        return mActivity.getDeviceProfile().isTablet ? SIGNIFICANT_MOVE_THRESHOLD_TABLET
+                : super.getSignificantMoveThreshold();
+    }
+
+    @Override
     public boolean onTouchEvent(MotionEvent ev) {
         super.onTouchEvent(ev);
 
@@ -1116,6 +1131,9 @@
             final TaskView taskView = (TaskView) getChildAt(pageIndex);
             taskView.bind(task, mOrientationState);
         }
+        if (mFocusedTaskId == -1 && getTaskViewCount() > 0) {
+            mFocusedTaskId = getTaskViewAt(0).getTaskId();
+        }
         updateTaskSize();
 
         if (mNextPage == INVALID_PAGE) {
@@ -1172,8 +1190,9 @@
     public void resetTaskVisuals() {
         for (int i = getTaskViewCount() - 1; i >= 0; i--) {
             TaskView taskView = getTaskViewAt(i);
-            if (mIgnoreResetTaskId != taskView.getTask().key.id) {
+            if (mIgnoreResetTaskId != taskView.getTaskId()) {
                 taskView.resetViewTransforms();
+                taskView.setIconScaleAndDim(mTaskIconScaledDown ? 0 : 1);
                 taskView.setStableAlpha(mContentAlpha);
                 taskView.setFullscreenProgress(mFullscreenProgress);
                 taskView.setModalness(mTaskModalness);
@@ -1192,11 +1211,6 @@
             setRunningTaskHidden(mRunningTaskTileHidden);
         }
 
-        // Force apply the scale.
-        if (mIgnoreResetTaskId != mRunningTaskId) {
-            applyRunningTaskIconScale();
-        }
-
         updateCurveProperties();
         // Update the set of visible task's data
         loadVisibleTaskData(TaskView.FLAG_UPDATE_ALL);
@@ -1291,6 +1305,11 @@
         mSizeStrategy.calculateGridTaskSize(mActivity, mActivity.getDeviceProfile(),
                 mLastComputedGridTaskSize, mOrientationHandler);
 
+        mTaskGridVerticalDiff = mLastComputedGridTaskSize.top - mLastComputedTaskSize.top;
+        mTopBottomRowHeightDiff =
+                mLastComputedGridTaskSize.height() + dp.overviewTaskThumbnailTopMarginPx
+                        + mRowSpacing;
+
         // Force TaskView to update size from thumbnail
         updateTaskSize();
 
@@ -1321,6 +1340,15 @@
      * Updates TaskView scaling and translation required to support variable width.
      */
     private void updateTaskSize() {
+        updateTaskSize(false);
+    }
+
+    /**
+     * Updates TaskView scaling and translation required to support variable width.
+     *
+     * @param isTaskDismissal indicates if update was called due to task dismissal
+     */
+    private void updateTaskSize(boolean isTaskDismissal) {
         final int taskCount = getTaskViewCount();
         if (taskCount == 0) {
             return;
@@ -1330,18 +1358,17 @@
         for (int i = 0; i < taskCount; i++) {
             TaskView taskView = getTaskViewAt(i);
             taskView.updateTaskSize();
-            taskView.getPrimaryFullscreenTranslationProperty().set(taskView,
-                    accumulatedTranslationX);
-            taskView.getSecondaryFullscreenTranslationProperty().set(taskView, 0f);
+            taskView.getPrimaryNonGridTranslationProperty().set(taskView, accumulatedTranslationX);
+            taskView.getSecondaryNonGridTranslationProperty().set(taskView, 0f);
             // Compensate space caused by TaskView scaling.
             float widthDiff =
-                    taskView.getLayoutParams().width * (1 - taskView.getFullscreenScale());
+                    taskView.getLayoutParams().width * (1 - taskView.getNonGridScale());
             accumulatedTranslationX += mIsRtl ? widthDiff : -widthDiff;
         }
 
         mClearAllButton.setFullscreenTranslationPrimary(accumulatedTranslationX);
 
-        updateGridProperties();
+        updateGridProperties(isTaskDismissal);
     }
 
     public void getTaskSize(Rect outRect) {
@@ -1356,19 +1383,7 @@
     public Point getSelectedTaskSize() {
         mSizeStrategy.calculateTaskSize(mActivity, mActivity.getDeviceProfile(), mTempRect,
                 mOrientationHandler);
-        int taskWidth = mTempRect.width();
-        int taskHeight = mTempRect.height();
-        if (mFocusedTaskId != -1) {
-            int boxLength = Math.max(taskWidth, taskHeight);
-            if (mFocusedTaskRatio > 1) {
-                taskWidth = boxLength;
-                taskHeight = (int) (boxLength / mFocusedTaskRatio);
-            } else {
-                taskWidth = (int) (boxLength * mFocusedTaskRatio);
-                taskHeight = boxLength;
-            }
-        }
-        return new Point(taskWidth, taskHeight);
+        return new Point(mTempRect.width(), mTempRect.height());
     }
 
     /** Gets the last computed task size */
@@ -1400,13 +1415,7 @@
             loadVisibleTaskData(TaskView.FLAG_UPDATE_ALL);
 
             // After scrolling, update ActionsView's visibility.
-            TaskView focusedTaskView = getFocusedTaskView();
-            if (focusedTaskView != null) {
-                float scrollDiff = Math.abs(getScrollForPage(indexOfChild(focusedTaskView))
-                        - mOrientationHandler.getPrimaryScroll(this));
-                float delta = (mGridSideMargin - scrollDiff) / (float) mGridSideMargin;
-                mActionsView.getScrollAlpha().setValue(Utilities.boundToRange(delta, 0, 1));
-            }
+            updateActionsViewScrollAlpha();
         }
 
         // Update the high res thumbnail loader state
@@ -1414,6 +1423,20 @@
         return scrolling;
     }
 
+    private void updateActionsViewScrollAlpha() {
+        float scrollAlpha = 1f;
+        if (showAsGrid()) {
+            TaskView focusedTaskView = getFocusedTaskView();
+            if (focusedTaskView != null) {
+                float scrollDiff = Math.abs(getScrollForPage(indexOfChild(focusedTaskView))
+                        - mOrientationHandler.getPrimaryScroll(this));
+                float delta = (mGridSideMargin - scrollDiff) / (float) mGridSideMargin;
+                scrollAlpha = Utilities.boundToRange(delta, 0, 1);
+            }
+        }
+        mActionsView.getScrollAlpha().setValue(scrollAlpha);
+    }
+
     /**
      * Scales and adjusts translation of adjacent pages as if on a curved carousel.
      */
@@ -1556,7 +1579,7 @@
         setCurrentTask(-1);
         mIgnoreResetTaskId = -1;
         mTaskListChangeId = -1;
-        mFocusedTaskId = -1;
+        mFocusedTaskId = getTaskViewCount() > 0 ? getTaskViewAt(0).getTaskId() : -1;
 
         if (mRecentsAnimationController != null) {
             if (LIVE_TILE.get() && mEnableDrawingLiveTile) {
@@ -1598,11 +1621,8 @@
         return getTaskView(mFocusedTaskId);
     }
 
-    /**
-     * Returns the width to height ratio of the focused {@link TaskView}.
-     */
-    public float getFocusedTaskRatio() {
-        return mFocusedTaskRatio;
+    protected @Nullable TaskView getHomeTaskView() {
+        return null;
     }
 
     /**
@@ -1641,7 +1661,7 @@
         setEnableFreeScroll(false);
         setEnableDrawingLiveTile(false);
         setRunningTaskHidden(true);
-        setRunningTaskIconScaledDown(true);
+        setTaskIconScaledDown(true);
     }
 
     /**
@@ -1650,9 +1670,7 @@
      */
     public void onSwipeUpAnimationSuccess() {
         Log.d("b/186444448", "onSwipeUpAnimationSuccess");
-        if (getRunningTaskView() != null) {
-            animateUpRunningTaskIconScale();
-        }
+        animateUpTaskIconScale();
         setSwipeDownShouldLaunchApp(true);
     }
 
@@ -1736,12 +1754,8 @@
             setRunningTaskViewShowScreenshot(true);
         }
         setRunningTaskHidden(false);
-        animateUpRunningTaskIconScale();
-
-        if (mCurrentGestureEndTarget == GestureState.GestureEndTarget.RECENTS
-                && (!showAsGrid() || getFocusedTaskView() != null)) {
-            animateActionsViewIn();
-        }
+        animateUpTaskIconScale();
+        animateActionsViewIn();
 
         mCurrentGestureEndTarget = null;
     }
@@ -1783,9 +1797,7 @@
         boolean runningTaskTileHidden = mRunningTaskTileHidden;
         int runningTaskId = runningTaskInfo == null ? -1 : runningTaskInfo.taskId;
         setCurrentTask(runningTaskId);
-        if (mActivity.getDeviceProfile().isTablet && FeatureFlags.ENABLE_OVERVIEW_GRID.get()) {
-            setFocusedTask(runningTaskId);
-        }
+        mFocusedTaskId = runningTaskId;
         setCurrentPage(getRunningTaskIndex());
         setRunningTaskViewShowScreenshot(false);
         setRunningTaskHidden(runningTaskTileHidden);
@@ -1806,7 +1818,7 @@
 
         if (mRunningTaskId != -1) {
             // Reset the state on the old running task view
-            setRunningTaskIconScaledDown(false);
+            setTaskIconScaledDown(false);
             setRunningTaskViewShowScreenshot(true);
             setRunningTaskHidden(false);
         }
@@ -1814,15 +1826,6 @@
     }
 
     /**
-     * Sets the focused task id and store the width to height ratio of the focused task.
-     */
-    protected void setFocusedTask(int focusedTaskId) {
-        mFocusedTaskId = focusedTaskId;
-        mFocusedTaskRatio =
-                mLastComputedTaskSize.width() / (float) mLastComputedTaskSize.height();
-    }
-
-    /**
      * Hides the tile associated with {@link #mRunningTaskId}
      */
     public void setRunningTaskHidden(boolean isHidden) {
@@ -1846,21 +1849,13 @@
         }
     }
 
-    public void setRunningTaskIconScaledDown(boolean isScaledDown) {
-        if (mRunningTaskIconScaledDown != isScaledDown) {
-            mRunningTaskIconScaledDown = isScaledDown;
-            applyRunningTaskIconScale();
-        }
-    }
-
-    public boolean isTaskIconScaledDown(TaskView taskView) {
-        return mRunningTaskIconScaledDown && getRunningTaskView() == taskView;
-    }
-
-    private void applyRunningTaskIconScale() {
-        TaskView firstTask = getRunningTaskView();
-        if (firstTask != null) {
-            firstTask.setIconScaleAndDim(mRunningTaskIconScaledDown ? 0 : 1);
+    public void setTaskIconScaledDown(boolean isScaledDown) {
+        if (mTaskIconScaledDown != isScaledDown) {
+            mTaskIconScaledDown = isScaledDown;
+            int taskCount = getTaskViewCount();
+            for (int i = 0; i < taskCount; i++) {
+                getTaskViewAt(i).setIconScaleAndDim(mTaskIconScaledDown ? 0 : 1);
+            }
         }
     }
 
@@ -1871,21 +1866,14 @@
         anim.start();
     }
 
-    private void animateActionsViewOut() {
-        ObjectAnimator anim = ObjectAnimator.ofFloat(
-                mActionsView.getVisibilityAlpha(), MultiValueAlpha.VALUE, 1, 0);
-        anim.setDuration(TaskView.SCALE_ICON_DURATION);
-        anim.start();
-    }
-
-    public void animateUpRunningTaskIconScale() {
-        mRunningTaskIconScaledDown = false;
-        TaskView firstTask = getRunningTaskView();
-        Log.d("b/186444448", "animateUpRunningTaskIconScale: firstTask="
-                + (firstTask != null ? "t:" + firstTask.getTask() : null));
-        if (firstTask != null) {
-            firstTask.setIconScaleAnimStartProgress(0f);
-            firstTask.animateIconScaleAndDimIntoView();
+    public void animateUpTaskIconScale() {
+        mTaskIconScaledDown = false;
+        Log.d("b/186444448", "animateUpRunningTaskIconScale");
+        int taskCount = getTaskViewCount();
+        for (int i = 0; i < taskCount; i++) {
+            TaskView taskView = getTaskViewAt(i);
+            taskView.setIconScaleAnimStartProgress(0f);
+            taskView.animateIconScaleAndDimIntoView();
         }
     }
 
@@ -1911,20 +1899,8 @@
             return;
         }
 
-        final int boxLength = Math.max(mLastComputedGridTaskSize.width(),
-                mLastComputedGridTaskSize.height());
         int taskTopMargin = mActivity.getDeviceProfile().overviewTaskThumbnailTopMarginPx;
 
-        /*
-         * taskGridVerticalDiff is used to position the top of a task in the top row of the grid
-         * heightOffset is the vertical space one grid task takes + space between top and
-         *   bottom row
-         * Summed together they provide the top position for bottom row of grid tasks
-         */
-        final float taskGridVerticalDiff =
-                mLastComputedGridTaskSize.top - mLastComputedTaskSize.top;
-        final float heightOffset = (boxLength + taskTopMargin) + mRowSpacing;
-
         int topRowWidth = 0;
         int bottomRowWidth = 0;
         float topAccumulatedTranslationX = 0;
@@ -1944,6 +1920,8 @@
         int snappedTaskRowWidth = 0;
         int snappedPage = getNextPage();
         TaskView snappedTaskView = getTaskViewAtByAbsoluteIndex(snappedPage);
+        TaskView homeTaskView = getHomeTaskView();
+        TaskView nextFocusedTaskView = null;
 
         if (!isTaskDismissal) {
             mTopRowIdSet.clear();
@@ -1981,15 +1959,20 @@
                     // calculate the distance focused task need to shift.
                     focusedTaskShift += mIsRtl ? taskWidthAndSpacing : -taskWidthAndSpacing;
                 }
-                int taskId = taskView.getTask().key.id;
+                int taskId = taskView.getTaskId();
                 boolean isTopRow = isTaskDismissal ? mTopRowIdSet.contains(taskId)
                         : topRowWidth <= bottomRowWidth;
                 if (isTopRow) {
-                    topRowWidth += taskWidthAndSpacing;
+                    if (homeTaskView != null && nextFocusedTaskView == null) {
+                        // TaskView will be focused when swipe up, don't count towards row width.
+                        nextFocusedTaskView = taskView;
+                    } else {
+                        topRowWidth += taskWidthAndSpacing;
+                    }
                     topSet.add(i);
                     mTopRowIdSet.add(taskId);
 
-                    taskView.setGridTranslationY(taskGridVerticalDiff);
+                    taskView.setGridTranslationY(mTaskGridVerticalDiff);
 
                     // Move horizontally into empty space.
                     float widthOffset = 0;
@@ -2008,7 +1991,7 @@
                     bottomSet.add(i);
 
                     // Move into bottom row.
-                    taskView.setGridTranslationY(heightOffset + taskGridVerticalDiff);
+                    taskView.setGridTranslationY(mTopBottomRowHeightDiff + mTaskGridVerticalDiff);
 
                     // Move horizontally into empty space.
                     float widthOffset = 0;
@@ -2032,20 +2015,18 @@
         // We need to maintain snapped task's page scroll invariant between quick switch and
         // overview, so we sure snapped task's grid translation is 0, and add a non-fullscreen
         // translationX that is the same as snapped task's full scroll adjustment.
-        float snappedTaskFullscreenScrollAdjustment = 0;
+        float snappedTaskNonGridScrollAdjustment = 0;
         float snappedTaskGridTranslationX = 0;
         if (snappedTaskView != null) {
-            snappedTaskFullscreenScrollAdjustment = snappedTaskView.getScrollAdjustment(
+            snappedTaskNonGridScrollAdjustment = snappedTaskView.getScrollAdjustment(
                     /*fullscreenEnabled=*/true, /*gridEnabled=*/false);
             snappedTaskGridTranslationX = gridTranslations[snappedPage - mTaskViewStartIndex];
         }
 
         for (int i = 0; i < taskCount; i++) {
             TaskView taskView = getTaskViewAt(i);
-            taskView.setGridTranslationX(gridTranslations[i] - snappedTaskGridTranslationX);
-            taskView.getPrimaryNonFullscreenTranslationProperty().set(taskView,
-                    snappedTaskFullscreenScrollAdjustment);
-            taskView.getSecondaryNonFullscreenTranslationProperty().set(taskView, 0f);
+            taskView.setGridTranslationX(gridTranslations[i] - snappedTaskGridTranslationX
+                    + snappedTaskNonGridScrollAdjustment);
         }
 
         // Use the accumulated translation of the row containing the last task.
@@ -2080,7 +2061,7 @@
 
         float clearAllTotalTranslationX =
                 clearAllAccumulatedTranslation + clearAllShorterRowCompensation
-                        + clearAllShortTotalCompensation + snappedTaskFullscreenScrollAdjustment;
+                        + clearAllShortTotalCompensation + snappedTaskNonGridScrollAdjustment;
         if (focusedTaskIndex < taskCount) {
             // Shift by focused task's width and spacing if a task is focused.
             clearAllTotalTranslationX +=
@@ -2091,8 +2072,10 @@
         // of swiping up after quick switch.
         if (snappedTaskView != null) {
             int distanceFromClearAll = longRowWidth - snappedTaskRowWidth;
+            // ClearAllButton should be off screen when snapped task is in its snapped position.
             int minimumDistance =
-                    mLastComputedGridSize.width() - snappedTaskView.getLayoutParams().width;
+                    mTaskWidth - snappedTaskView.getLayoutParams().width
+                            + (mLastComputedGridSize.width() - mTaskWidth) / 2;
             if (distanceFromClearAll < minimumDistance) {
                 int distanceDifference = minimumDistance - distanceFromClearAll;
                 clearAllTotalTranslationX += mIsRtl ? -distanceDifference : distanceDifference;
@@ -2112,8 +2095,8 @@
         if (taskView1 == null || taskView2 == null) {
             return false;
         }
-        int taskId1 = taskView1.getTask().key.id;
-        int taskId2 = taskView2.getTask().key.id;
+        int taskId1 = taskView1.getTaskId();
+        int taskId2 = taskView2.getTaskId();
         if (taskId1 == mFocusedTaskId || taskId2 == mFocusedTaskId) {
             return false;
         }
@@ -2242,8 +2225,16 @@
         }
     }
 
-    public PendingAnimation createTaskDismissAnimation(TaskView taskView, boolean animateTaskView,
-            boolean shouldRemoveTask, long duration) {
+    /**
+     * Creates a {@link PendingAnimation} for dismissing the specified {@link TaskView}.
+     * @param dismissedTaskView the {@link TaskView} to be dismissed
+     * @param animateTaskView whether the {@link TaskView} to be dismissed should be animated
+     * @param shouldRemoveTask whether the associated {@link Task} should be removed from
+     *                         ActivityManager after dismissal
+     * @param duration duration of the animation
+     */
+    public PendingAnimation createTaskDismissAnimation(TaskView dismissedTaskView,
+            boolean animateTaskView, boolean shouldRemoveTask, long duration) {
         if (mPendingAnimation != null) {
             mPendingAnimation.createPlaybackController().dispatchOnCancel();
         }
@@ -2254,30 +2245,65 @@
             return anim;
         }
 
+        boolean showAsGrid = showAsGrid();
+        int taskCount = getTaskViewCount();
+        int dismissedIndex = indexOfChild(dismissedTaskView);
+        int dismissedTaskId = dismissedTaskView.getTaskId();
+
+        // Grid specific properties.
+        boolean isFocusedTaskDismissed = false;
+        TaskView nextFocusedTaskView = null;
+        boolean nextFocusedTaskFromTop = false;
+        float dismissedTaskWidth = 0;
+        float nextFocusedTaskWidth = 0;
+
+        // Non-grid specific properties.
         int[] oldScroll = new int[count];
         int[] newScroll = new int[count];
-        getPageScrolls(oldScroll, false, SIMPLE_SCROLL_LOGIC);
-        getPageScrolls(newScroll, false, (v) -> v.getVisibility() != GONE && v != taskView);
-        int taskCount = getTaskViewCount();
         int scrollDiffPerPage = 0;
-        if (count > 1) {
-            scrollDiffPerPage = Math.abs(oldScroll[1] - oldScroll[0]);
-        }
-        int draggedIndex = indexOfChild(taskView);
-
-        boolean isFocusedTaskDismissed = taskView.getTask().key.id == mFocusedTaskId;
-        if (isFocusedTaskDismissed && showAsGrid()) {
-            anim.setFloat(mActionsView, VIEW_ALPHA, 0, clampToProgress(ACCEL_0_5, 0, 0.5f));
-        }
-        float dismissedTaskWidth = taskView.getLayoutParams().width + mPageSpacing;
         boolean needsCurveUpdates = false;
+
+        if (showAsGrid) {
+            dismissedTaskWidth = dismissedTaskView.getLayoutParams().width + mPageSpacing;
+            isFocusedTaskDismissed = dismissedTaskId == mFocusedTaskId;
+            if (isFocusedTaskDismissed) {
+                nextFocusedTaskFromTop =
+                        mTopRowIdSet.size() > 0 && mTopRowIdSet.size() >= (taskCount - 1) / 2f;
+                // Pick the next focused task from the preferred row.
+                for (int i = 0; i < taskCount; i++) {
+                    TaskView taskView = getTaskViewAt(i);
+                    if (taskView == dismissedTaskView) {
+                        continue;
+                    }
+                    boolean isTopRow = mTopRowIdSet.contains(taskView.getTaskId());
+                    if ((nextFocusedTaskFromTop && isTopRow
+                            || (!nextFocusedTaskFromTop && !isTopRow))) {
+                        nextFocusedTaskView = taskView;
+                        break;
+                    }
+                }
+                if (nextFocusedTaskView != null) {
+                    nextFocusedTaskWidth =
+                            nextFocusedTaskView.getLayoutParams().width + mPageSpacing;
+                }
+            }
+        } else {
+            getPageScrolls(oldScroll, false, SIMPLE_SCROLL_LOGIC);
+            getPageScrolls(newScroll, false,
+                    v -> v.getVisibility() != GONE && v != dismissedTaskView);
+            if (count > 1) {
+                scrollDiffPerPage = Math.abs(oldScroll[1] - oldScroll[0]);
+            }
+        }
+
+        int distanceFromDismissedTask = 0;
         for (int i = 0; i < count; i++) {
             View child = getChildAt(i);
-            if (child == taskView) {
+            if (child == dismissedTaskView) {
                 if (animateTaskView) {
-                    addDismissedTaskAnimations(taskView, duration, anim);
+                    addDismissedTaskAnimations(dismissedTaskView, duration, anim);
                 }
-            } else if (!showAsGrid()) {
+            } else if (!showAsGrid) {
                 // Compute scroll offsets from task dismissal for animation.
                 // If we just take newScroll - oldScroll, everything to the right of dragged task
                 // translates to the left. We need to offset this in some cases:
@@ -2286,15 +2312,15 @@
                 // - Current page is rightmost page (leftmost for RTL)
                 // - Dragging an adjacent page on the left side (right side for RTL)
                 int offset = mIsRtl ? scrollDiffPerPage : 0;
-                if (mCurrentPage == draggedIndex) {
+                if (mCurrentPage == dismissedIndex) {
                     int lastPage = taskCount - 1;
                     if (mCurrentPage == lastPage) {
                         offset += mIsRtl ? -scrollDiffPerPage : scrollDiffPerPage;
                     }
                 } else {
-                    // Dragging an adjacent page.
+                    // Dismissing an adjacent page.
                     int negativeAdjacent = mCurrentPage - 1; // (Right in RTL, left in LTR)
-                    if (draggedIndex == negativeAdjacent) {
+                    if (dismissedIndex == negativeAdjacent) {
                         offset += mIsRtl ? -scrollDiffPerPage : scrollDiffPerPage;
                     }
                 }
@@ -2307,7 +2333,7 @@
 
                     float additionalDismissDuration =
                             ADDITIONAL_DISMISS_TRANSLATION_INTERPOLATION_OFFSET * Math.abs(
-                                    i - draggedIndex);
+                                    i - dismissedIndex);
                     anim.setFloat(child, translationProperty, scrollDiff, clampToProgress(LINEAR,
                             Utilities.boundToRange(INITIAL_DISMISS_TRANSLATION_INTERPOLATION_OFFSET
                                     + additionalDismissDuration, 0f, 1f), 1));
@@ -2323,21 +2349,46 @@
                     needsCurveUpdates = true;
                 }
             } else if (child instanceof TaskView) {
+                TaskView taskView = (TaskView) child;
+                if (isFocusedTaskDismissed) {
+                    if (!isSameGridRow(taskView, nextFocusedTaskView)) {
+                        continue;
+                    }
+                } else {
+                    if (i < dismissedIndex || !isSameGridRow(taskView, dismissedTaskView)) {
+                        continue;
+                    }
+                }
                 // Animate task with index >= dismissed index and in the same row as the
-                // dismissed index, or if the dismissed task was the focused task. Offset
-                // successive task dismissal durations for a staggered effect.
-                if (isFocusedTaskDismissed || (i >= draggedIndex && isSameGridRow((TaskView) child,
-                        taskView))) {
-                    FloatProperty translationProperty =
-                            ((TaskView) child).getPrimaryDismissTranslationProperty();
-                    float additionalDismissDuration =
-                            ADDITIONAL_DISMISS_TRANSLATION_INTERPOLATION_OFFSET * Math.abs(
-                                    i - draggedIndex);
-                    anim.setFloat(child, translationProperty,
-                            !mIsRtl ? -dismissedTaskWidth : dismissedTaskWidth,
-                            clampToProgress(LINEAR, Utilities.boundToRange(
-                                    INITIAL_DISMISS_TRANSLATION_INTERPOLATION_OFFSET
-                                            + additionalDismissDuration, 0f, 1f), 1));
+                // dismissed index or next focused index. Offset successive task dismissal
+                // durations for a staggered effect.
+                float animationStartProgress = Utilities.boundToRange(
+                        INITIAL_DISMISS_TRANSLATION_INTERPOLATION_OFFSET
+                                + ADDITIONAL_DISMISS_TRANSLATION_INTERPOLATION_OFFSET
+                                * ++distanceFromDismissedTask, 0f, 1f);
+                if (taskView == nextFocusedTaskView) {
+                    // Enlarge the task to be focused next, and translate into focus position.
+                    float scale = mTaskWidth / (float) mLastComputedGridTaskSize.width();
+                    anim.setFloat(taskView, TaskView.SNAPSHOT_SCALE, scale,
+                            clampToProgress(LINEAR, animationStartProgress, 1f));
+                    anim.setFloat(taskView, taskView.getPrimaryDismissTranslationProperty(),
+                            mIsRtl ? dismissedTaskWidth : -dismissedTaskWidth,
+                            clampToProgress(LINEAR, animationStartProgress, 1f));
+                    float secondaryTranslation = -mTaskGridVerticalDiff;
+                    if (!nextFocusedTaskFromTop) {
+                        secondaryTranslation -= mTopBottomRowHeightDiff;
+                    }
+                    anim.setFloat(taskView, taskView.getSecondaryDissmissTranslationProperty(),
+                            secondaryTranslation,
+                            clampToProgress(LINEAR, animationStartProgress, 1f));
+                    anim.setFloat(taskView, TaskView.FOCUS_TRANSITION, 0f,
+                            clampToProgress(LINEAR, 0f, ANIMATION_DISMISS_PROGRESS_MIDPOINT));
+                } else {
+                    float primaryTranslation =
+                            isFocusedTaskDismissed ? nextFocusedTaskWidth : dismissedTaskWidth;
+                    anim.setFloat(taskView, taskView.getPrimaryDismissTranslationProperty(),
+                            mIsRtl ? primaryTranslation : -primaryTranslation,
+                            clampToProgress(LINEAR, animationStartProgress, 1f));
                 }
             }
         }
@@ -2348,14 +2399,15 @@
 
         // Add a tiny bit of translation Z, so that it draws on top of other views
         if (animateTaskView) {
-            taskView.setTranslationZ(0.1f);
+            dismissedTaskView.setTranslationZ(0.1f);
         }
 
         mPendingAnimation = anim;
+        final TaskView finalNextFocusedTaskView = nextFocusedTaskView;
         mPendingAnimation.addEndListener(new Consumer<Boolean>() {
             @Override
             public void accept(Boolean success) {
-                if (LIVE_TILE.get() && mEnableDrawingLiveTile && taskView.isRunningTask()
+                if (LIVE_TILE.get() && mEnableDrawingLiveTile && dismissedTaskView.isRunningTask()
                         && success) {
                     finishRecentsAnimation(true /* toRecents */, false /* shouldPip */,
                             () -> onEnd(success));
@@ -2368,16 +2420,15 @@
             private void onEnd(boolean success) {
                 if (success) {
                     if (shouldRemoveTask) {
-                        if (taskView.getTask() != null) {
+                        if (dismissedTaskView.getTask() != null) {
                             finishRecentsAnimation(true /* toRecents */, false /* shouldPip */,
                                     () -> {
                                 UI_HELPER_EXECUTOR.getHandler().postDelayed(() ->
                                         ActivityManagerWrapper.getInstance().removeTask(
-                                                taskView.getTask().key.id),
-                                        REMOVE_TASK_WAIT_FOR_APP_STOP_MS);
+                                                dismissedTaskId), REMOVE_TASK_WAIT_FOR_APP_STOP_MS);
                             });
                             mActivity.getStatsLogManager().logger()
-                                    .withItemInfo(taskView.getItemInfo())
+                                    .withItemInfo(dismissedTaskView.getItemInfo())
                                     .log(LAUNCHER_TASK_DISMISS_SWIPE_UP);
                         }
                     }
@@ -2387,32 +2438,32 @@
                     resetTaskVisuals();
 
                     int pageToSnapTo = mCurrentPage;
-                    // Snap to start if focused task was dismissed, as after quick switch it could
-                    // be at any page but the focused task always displays at the start.
-                    if (taskView.getTask().key.id == mFocusedTaskId) {
-                        pageToSnapTo = mTaskViewStartIndex;
-                    } else if (draggedIndex < pageToSnapTo || pageToSnapTo == (getTaskViewCount()
-                            - 1)) {
+                    if (finalNextFocusedTaskView != null) {
+                        pageToSnapTo = indexOfChild(finalNextFocusedTaskView);
+                    }
+                    if (dismissedIndex < pageToSnapTo || pageToSnapTo == (taskCount - 1)) {
                         pageToSnapTo -= 1;
                     }
-                    removeViewInLayout(taskView);
+                    removeViewInLayout(dismissedTaskView);
+                    mTopRowIdSet.remove(dismissedTaskId);
 
-                    if (getTaskViewCount() == 0) {
+                    if (taskCount == 1) {
                         removeViewInLayout(mClearAllButton);
                         startHome();
                     } else {
+                        // Update focus task and its size.
+                        if (finalNextFocusedTaskView != null) {
+                            mFocusedTaskId = finalNextFocusedTaskView.getTaskId();
+                            mTopRowIdSet.remove(mFocusedTaskId);
+                            finalNextFocusedTaskView.animateIconScaleAndDimIntoView();
+                            setCurrentPage(pageToSnapTo);
+                        }
+                        updateTaskSize(true);
+                        // Update scroll and snap to page.
+                        updateScrollSynchronously();
                         snapToPageImmediately(pageToSnapTo);
                         dispatchScrollChanged();
-                        // Grid got messed up, reapply.
-                        updateGridProperties(true);
-                        if (showAsGrid() && getFocusedTaskView() == null
-                                && mActionsView.getVisibilityAlpha().getValue() == 1) {
-                            animateActionsViewOut();
-                        }
                     }
-                    // Update the layout synchronously so that the position of next view is
-                    // immediately available.
-                    onLayout(false /*  changed */, getLeft(), getTop(), getRight(), getBottom());
                 }
                 onDismissAnimationEnds();
                 mPendingAnimation = null;
@@ -2448,7 +2499,8 @@
         int taskCount = getTaskViewCount();
         for (int i = 0; i < taskCount; i++) {
             TaskView taskView = getTaskViewAt(i);
-            if (taskView == mSplitHiddenTaskView && taskView != getFocusedTaskView()) {
+            if (taskView == mSplitHiddenTaskView
+                    && !(showAsGrid() && taskView == getFocusedTaskView())) {
                 // Case where the hidden task view would have overlapped w/ placeholder,
                 // but because it's going to hide we don't care
                 // TODO (b/187312247) edge case for thumbnails that are off screen but scroll on
@@ -2596,7 +2648,7 @@
         mContentAlpha = alpha;
         for (int i = getTaskViewCount() - 1; i >= 0; i--) {
             TaskView child = getTaskViewAt(i);
-            if (!mRunningTaskTileHidden || child.getTask().key.id != mRunningTaskId) {
+            if (!mRunningTaskTileHidden || child.getTaskId() != mRunningTaskId) {
                 child.setStableAlpha(alpha);
             }
         }
@@ -2733,6 +2785,12 @@
 
     @Override
     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
+        // If we're going to HOME, avoid unnecessary onLayout that cause TaskViews to re-arrange
+        // during animation to HOME.
+        if (mCurrentGestureEndTarget == GestureState.GestureEndTarget.HOME) {
+            return;
+        }
+
         super.onLayout(changed, left, top, right, bottom);
 
         updateEmptyStateUi(changed);
@@ -2828,6 +2886,12 @@
             outRect.offset(taskView.getPersistentTranslationX(),
                     taskView.getPersistentTranslationY());
             outRect.top += mActivity.getDeviceProfile().overviewTaskThumbnailTopMarginPx;
+
+            mTempMatrix.reset();
+            float persistentScale = taskView.getPersistentScale();
+            mTempMatrix.postScale(persistentScale, persistentScale,
+                    mIsRtl ? outRect.right : outRect.left, outRect.top);
+            mTempMatrix.mapRect(outRect);
         }
         outRect.offset(mOrientationHandler.getPrimaryValue(-midPointScroll, 0),
                 mOrientationHandler.getSecondaryValue(-midPointScroll, 0));
@@ -3422,9 +3486,13 @@
     }
 
     /**
-     * Updates page scroll synchronously and layout child views.
+     * Updates page scroll synchronously after measure and layout child views.
      */
     public void updateScrollSynchronously() {
+        // onMeasure is needed to update child's measured width which is used in scroll calculation,
+        // in case TaskView sizes has changed when being focused/unfocused.
+        onMeasure(makeMeasureSpec(getMeasuredWidth(), EXACTLY),
+                makeMeasureSpec(getMeasuredHeight(), EXACTLY));
         onLayout(false /*  changed */, getLeft(), getTop(), getRight(), getBottom());
         updateMinAndMaxScrollX();
     }
@@ -3622,6 +3690,7 @@
     public void setOverviewGridEnabled(boolean overviewGridEnabled) {
         if (mOverviewGridEnabled != overviewGridEnabled) {
             mOverviewGridEnabled = overviewGridEnabled;
+            updateActionsViewScrollAlpha();
             // Request layout to ensure scroll position is recalculated with updated mGridProgress.
             requestLayout();
         }
@@ -3767,11 +3836,6 @@
                 && mCurrentGestureEndTarget != GestureState.GestureEndTarget.RECENTS;
     }
 
-    public boolean shouldShowOverviewActionsForState(STATE_TYPE state) {
-        return !state.displayOverviewTasksAsGrid(mActivity.getDeviceProfile())
-                || getFocusedTaskView() != null;
-    }
-
     /**
      * Used to register callbacks for when our empty message state changes.
      *
diff --git a/quickstep/src/com/android/quickstep/views/TaskThumbnailView.java b/quickstep/src/com/android/quickstep/views/TaskThumbnailView.java
index f730d2d..df195d7 100644
--- a/quickstep/src/com/android/quickstep/views/TaskThumbnailView.java
+++ b/quickstep/src/com/android/quickstep/views/TaskThumbnailView.java
@@ -421,7 +421,9 @@
      */
     public static class PreviewPositionHelper {
 
-        // Contains the portion of the thumbnail that is clipped when fullscreen progress = 0.
+        private static final RectF EMPTY_RECT_F = new RectF();
+
+        // Contains the portion of the thumbnail that is unclipped when fullscreen progress = 1.
         private final RectF mClippedInsets = new RectF();
         private final Matrix mMatrix = new Matrix();
         private boolean mIsOrientationChanged;
@@ -626,15 +628,17 @@
                     break;
             }
             mClippedInsets.offsetTo(newLeftInset * scale, newTopInset * scale);
-            mMatrix.postTranslate(translateX - mClippedInsets.left,
-                    translateY - mClippedInsets.top);
+            mMatrix.postTranslate(translateX, translateY);
+            if (TaskView.FULL_THUMBNAIL) {
+                mMatrix.postTranslate(-mClippedInsets.left, -mClippedInsets.top);
+            }
         }
 
         /**
          * Insets to used for clipping the thumbnail (in case it is drawing outside its own space)
          */
         public RectF getInsetsToDrawInFullscreen() {
-            return mClippedInsets;
+            return TaskView.FULL_THUMBNAIL ? mClippedInsets : EMPTY_RECT_F;
         }
     }
 }
diff --git a/quickstep/src/com/android/quickstep/views/TaskView.java b/quickstep/src/com/android/quickstep/views/TaskView.java
index b2a7b1b..8ed6c14 100644
--- a/quickstep/src/com/android/quickstep/views/TaskView.java
+++ b/quickstep/src/com/android/quickstep/views/TaskView.java
@@ -147,13 +147,18 @@
      */
     public static final boolean CLIP_STATUS_AND_NAV_BARS = false;
 
+    /**
+     * Should the TaskView scale down to fit whole thumbnail in fullscreen.
+     */
+    public static final boolean FULL_THUMBNAIL = false;
+
     private static final float EDGE_SCALE_DOWN_FACTOR_CAROUSEL = 0.03f;
     private static final float EDGE_SCALE_DOWN_FACTOR_GRID = 0.00f;
 
     public static final long SCALE_ICON_DURATION = 120;
     private static final long DIM_ANIM_DURATION = 700;
 
-    private static final Interpolator FULLSCREEN_INTERPOLATOR = ACCEL_DEACCEL;
+    private static final Interpolator GRID_INTERPOLATOR = ACCEL_DEACCEL;
 
     /**
      * This technically can be a vanilla {@link TouchDelegate} class, however that class requires
@@ -167,7 +172,7 @@
     private static final List<Rect> SYSTEM_GESTURE_EXCLUSION_RECT =
             Collections.singletonList(new Rect());
 
-    private static final FloatProperty<TaskView> FOCUS_TRANSITION =
+    public static final FloatProperty<TaskView> FOCUS_TRANSITION =
             new FloatProperty<TaskView>("focusTransition") {
                 @Override
                 public void setValue(TaskView taskView, float v) {
@@ -284,55 +289,42 @@
                 }
             };
 
-    private static final FloatProperty<TaskView> FULLSCREEN_TRANSLATION_X =
-            new FloatProperty<TaskView>("fullscreenTranslationX") {
+    private static final FloatProperty<TaskView> NON_GRID_TRANSLATION_X =
+            new FloatProperty<TaskView>("nonGridTranslationX") {
                 @Override
                 public void setValue(TaskView taskView, float v) {
-                    taskView.setFullscreenTranslationX(v);
+                    taskView.setNonGridTranslationX(v);
                 }
 
                 @Override
                 public Float get(TaskView taskView) {
-                    return taskView.mFullscreenTranslationX;
+                    return taskView.mNonGridTranslationX;
                 }
             };
 
-    private static final FloatProperty<TaskView> FULLSCREEN_TRANSLATION_Y =
-            new FloatProperty<TaskView>("fullscreenTranslationY") {
+    private static final FloatProperty<TaskView> NON_GRID_TRANSLATION_Y =
+            new FloatProperty<TaskView>("nonGridTranslationY") {
                 @Override
                 public void setValue(TaskView taskView, float v) {
-                    taskView.setFullscreenTranslationY(v);
+                    taskView.setNonGridTranslationY(v);
                 }
 
                 @Override
                 public Float get(TaskView taskView) {
-                    return taskView.mFullscreenTranslationY;
+                    return taskView.mNonGridTranslationY;
                 }
             };
 
-    private static final FloatProperty<TaskView> NON_FULLSCREEN_TRANSLATION_X =
-            new FloatProperty<TaskView>("nonFullscreenTranslationX") {
+    public static final FloatProperty<TaskView> SNAPSHOT_SCALE =
+            new FloatProperty<TaskView>("snapshotScale") {
                 @Override
                 public void setValue(TaskView taskView, float v) {
-                    taskView.setNonFullscreenTranslationX(v);
+                    taskView.setSnapshotScale(v);
                 }
 
                 @Override
                 public Float get(TaskView taskView) {
-                    return taskView.mNonFullscreenTranslationX;
-                }
-            };
-
-    private static final FloatProperty<TaskView> NON_FULLSCREEN_TRANSLATION_Y =
-            new FloatProperty<TaskView>("nonFullscreenTranslationY") {
-                @Override
-                public void setValue(TaskView taskView, float v) {
-                    taskView.setNonFullscreenTranslationY(v);
-                }
-
-                @Override
-                public Float get(TaskView taskView) {
-                    return taskView.mNonFullscreenTranslationY;
+                    return taskView.mSnapshotView.getScaleX();
                 }
             };
 
@@ -344,7 +336,7 @@
     private final DigitalWellBeingToast mDigitalWellBeingToast;
     private float mFullscreenProgress;
     private float mGridProgress;
-    private float mFullscreenScale = 1;
+    private float mNonGridScale = 1;
     private final FullscreenDrawParams mCurrentFullscreenParams;
     private final StatefulActivity mActivity;
 
@@ -356,16 +348,14 @@
     private float mTaskResistanceTranslationX;
     private float mTaskResistanceTranslationY;
     // The following translation variables should only be used in the same orientation as Launcher.
-    private float mFullscreenTranslationX;
-    private float mFullscreenTranslationY;
-    // Applied as a complement to fullscreenTranslation, for adjusting the carousel overview, or the
-    // in transition carousel before forming the grid on tablets.
-    private float mNonFullscreenTranslationX;
-    private float mNonFullscreenTranslationY;
     private float mBoxTranslationY;
     // The following grid translations scales with mGridProgress.
     private float mGridTranslationX;
     private float mGridTranslationY;
+    // Applied as a complement to gridTranslation, for adjusting the carousel overview and quick
+    // switch.
+    private float mNonGridTranslationX;
+    private float mNonGridTranslationY;
     // Used when in SplitScreenSelectState
     private float mSplitSelectTranslationY;
     private float mSplitSelectTranslationX;
@@ -524,8 +514,8 @@
         return mTask;
     }
 
-    public boolean hasTaskId(int taskId) {
-        return mTask != null && mTask.key != null && mTask.key.id == taskId;
+    public int getTaskId() {
+        return mTask != null && mTask.key != null ? mTask.key.id : -1;
     }
 
     public TaskThumbnailView getThumbnail() {
@@ -847,6 +837,7 @@
                 mSplitSelectTranslationX = 0f;
         mDismissTranslationY = mTaskOffsetTranslationY = mTaskResistanceTranslationY =
                 mSplitSelectTranslationY = 0f;
+        setSnapshotScale(1f);
         applyTranslationX();
         applyTranslationY();
         setTranslationZ(0);
@@ -862,9 +853,8 @@
 
     @Override
     public void onRecycle() {
-        mFullscreenTranslationX = mFullscreenTranslationY = mNonFullscreenTranslationX =
-                mNonFullscreenTranslationY = mGridTranslationX = mGridTranslationY =
-                        mBoxTranslationY = 0f;
+        mNonGridTranslationX = mNonGridTranslationY =
+                mGridTranslationX = mGridTranslationY = mBoxTranslationY = 0f;
         resetViewTransforms();
         // Clear any references to the thumbnail (it will be re-read either from the cache or the
         // system on next bind)
@@ -926,6 +916,9 @@
         if (mActivity.getDeviceProfile().isTablet && FeatureFlags.ENABLE_OVERVIEW_GRID.get()) {
             setPivotX(getLayoutDirection() == LAYOUT_DIRECTION_RTL ? 0 : right - left);
             setPivotY(mSnapshotView.getTop());
+            mSnapshotView.setPivotX(
+                    getLayoutDirection() == LAYOUT_DIRECTION_RTL ? 0 : right - left);
+            mSnapshotView.setPivotY(0);
         } else {
             setPivotX((right - left) * 0.5f);
             setPivotY(mSnapshotView.getTop() + mSnapshotView.getHeight() * 0.5f);
@@ -947,13 +940,18 @@
         }
     }
 
-    private void setFullscreenScale(float fullscreenScale) {
-        mFullscreenScale = fullscreenScale;
+    private void setNonGridScale(float nonGridScale) {
+        mNonGridScale = nonGridScale;
         applyScale();
     }
 
-    public float getFullscreenScale() {
-        return mFullscreenScale;
+    public float getNonGridScale() {
+        return mNonGridScale;
+    }
+
+    private void setSnapshotScale(float dismissScale) {
+        mSnapshotView.setScaleX(dismissScale);
+        mSnapshotView.setScaleY(dismissScale);
     }
 
     /**
@@ -970,12 +968,22 @@
 
     private void applyScale() {
         float scale = 1;
-        float fullScreenProgress = FULLSCREEN_INTERPOLATOR.getInterpolation(mFullscreenProgress);
-        scale *= Utilities.mapRange(fullScreenProgress, 1f, mFullscreenScale);
+        scale *= getPersistentScale();
         setScaleX(scale);
         setScaleY(scale);
     }
 
+    /**
+     * Returns multiplication of scale that is persistent (e.g. fullscreen and grid), and does not
+     * change according to a temporary state.
+     */
+    public float getPersistentScale() {
+        float scale = 1;
+        float gridProgress = GRID_INTERPOLATOR.getInterpolation(mGridProgress);
+        scale *= Utilities.mapRange(gridProgress, mNonGridScale, 1f);
+        return scale;
+    }
+
     private void setSplitSelectTranslationX(float x) {
         mSplitSelectTranslationX = x;
         applyTranslationX();
@@ -1015,23 +1023,13 @@
         applyTranslationY();
     }
 
-    private void setFullscreenTranslationX(float fullscreenTranslationX) {
-        mFullscreenTranslationX = fullscreenTranslationX;
+    private void setNonGridTranslationX(float nonGridTranslationX) {
+        mNonGridTranslationX = nonGridTranslationX;
         applyTranslationX();
     }
 
-    private void setFullscreenTranslationY(float fullscreenTranslationY) {
-        mFullscreenTranslationY = fullscreenTranslationY;
-        applyTranslationY();
-    }
-
-    private void setNonFullscreenTranslationX(float nonFullscreenTranslationX) {
-        mNonFullscreenTranslationX = nonFullscreenTranslationX;
-        applyTranslationX();
-    }
-
-    private void setNonFullscreenTranslationY(float nonFullscreenTranslationY) {
-        mNonFullscreenTranslationY = nonFullscreenTranslationY;
+    private void setNonGridTranslationY(float nonGridTranslationY) {
+        mNonGridTranslationY = nonGridTranslationY;
         applyTranslationY();
     }
 
@@ -1055,13 +1053,10 @@
 
     public float getScrollAdjustment(boolean fullscreenEnabled, boolean gridEnabled) {
         float scrollAdjustment = 0;
-        if (fullscreenEnabled) {
-            scrollAdjustment += getPrimaryFullscreenTranslationProperty().get(this);
-        } else {
-            scrollAdjustment += getPrimaryNonFullscreenTranslationProperty().get(this);
-        }
         if (gridEnabled) {
             scrollAdjustment += mGridTranslationX;
+        } else {
+            scrollAdjustment += getPrimaryNonGridTranslationProperty().get(this);
         }
         return scrollAdjustment;
     }
@@ -1073,7 +1068,7 @@
     public float getSizeAdjustment(boolean fullscreenEnabled) {
         float sizeAdjustment = 1;
         if (fullscreenEnabled) {
-            sizeAdjustment *= mFullscreenScale;
+            sizeAdjustment *= mNonGridScale;
         }
         return sizeAdjustment;
     }
@@ -1098,9 +1093,7 @@
      * change according to a temporary state (e.g. task offset).
      */
     public float getPersistentTranslationX() {
-        return getFullscreenTrans(mFullscreenTranslationX)
-                + getNonFullscreenTrans(mNonFullscreenTranslationX)
-                + getGridTrans(mGridTranslationX);
+        return getNonGridTrans(mNonGridTranslationX) + getGridTrans(mGridTranslationX);
     }
 
     /**
@@ -1109,8 +1102,7 @@
      */
     public float getPersistentTranslationY() {
         return mBoxTranslationY
-                + getFullscreenTrans(mFullscreenTranslationY)
-                + getNonFullscreenTrans(mNonFullscreenTranslationY)
+                + getNonGridTrans(mNonGridTranslationY)
                 + getGridTrans(mGridTranslationY);
     }
 
@@ -1144,24 +1136,14 @@
                 TASK_RESISTANCE_TRANSLATION_X, TASK_RESISTANCE_TRANSLATION_Y);
     }
 
-    public FloatProperty<TaskView> getPrimaryFullscreenTranslationProperty() {
+    public FloatProperty<TaskView> getPrimaryNonGridTranslationProperty() {
         return getPagedOrientationHandler().getPrimaryValue(
-                FULLSCREEN_TRANSLATION_X, FULLSCREEN_TRANSLATION_Y);
+                NON_GRID_TRANSLATION_X, NON_GRID_TRANSLATION_Y);
     }
 
-    public FloatProperty<TaskView> getSecondaryFullscreenTranslationProperty() {
+    public FloatProperty<TaskView> getSecondaryNonGridTranslationProperty() {
         return getPagedOrientationHandler().getSecondaryValue(
-                FULLSCREEN_TRANSLATION_X, FULLSCREEN_TRANSLATION_Y);
-    }
-
-    public FloatProperty<TaskView> getPrimaryNonFullscreenTranslationProperty() {
-        return getPagedOrientationHandler().getPrimaryValue(
-                NON_FULLSCREEN_TRANSLATION_X, NON_FULLSCREEN_TRANSLATION_Y);
-    }
-
-    public FloatProperty<TaskView> getSecondaryNonFullscreenTranslationProperty() {
-        return getPagedOrientationHandler().getSecondaryValue(
-                NON_FULLSCREEN_TRANSLATION_X, NON_FULLSCREEN_TRANSLATION_Y);
+                NON_GRID_TRANSLATION_X, NON_GRID_TRANSLATION_Y);
     }
 
     @Override
@@ -1299,19 +1281,9 @@
         mIconView.setVisibility(progress < 1 ? VISIBLE : INVISIBLE);
         getThumbnail().getTaskOverlay().setFullscreenProgress(progress);
 
-        applyTranslationX();
-        applyTranslationY();
-        applyScale();
-
         TaskThumbnailView thumbnail = getThumbnail();
         updateCurrentFullscreenParams(thumbnail.getPreviewPositionHelper());
 
-        if (!getRecentsView().isTaskIconScaledDown(this)) {
-            // Some of the items in here are dependent on the current fullscreen params, but don't
-            // update them if the icon is supposed to be scaled down.
-            setIconScaleAndDim(progress, true /* invert */);
-        }
-
         thumbnail.setFullscreenParams(mCurrentFullscreenParams);
         mOutlineProvider.updateParams(
                 mCurrentFullscreenParams,
@@ -1326,6 +1298,7 @@
         mCurrentFullscreenParams.setProgress(
                 mFullscreenProgress,
                 getRecentsView().getScaleX(),
+                getScaleX(),
                 getWidth(), mActivity.getDeviceProfile(),
                 previewPositionHelper);
     }
@@ -1336,7 +1309,7 @@
      */
     void updateTaskSize() {
         ViewGroup.LayoutParams params = getLayoutParams();
-        float fullscreenScale;
+        float nonGridScale;
         float boxTranslationY;
         int expectedWidth;
         int expectedHeight;
@@ -1349,56 +1322,36 @@
 
             int boxWidth;
             int boxHeight;
-            float thumbnailRatio;
             boolean isFocusedTask = isFocusedTask();
             if (isFocusedTask) {
                 // Task will be focused and should use focused task size. Use focusTaskRatio
                 // that is associated with the original orientation of the focused task.
                 boxWidth = taskWidth;
                 boxHeight = taskHeight;
-                thumbnailRatio = getRecentsView().getFocusedTaskRatio();
             } else {
                 // Otherwise task is in grid, and should use lastComputedGridTaskSize.
                 Rect lastComputedGridTaskSize = getRecentsView().getLastComputedGridTaskSize();
                 boxWidth = lastComputedGridTaskSize.width();
                 boxHeight = lastComputedGridTaskSize.height();
-                thumbnailRatio = mTask != null ? mTask.getVisibleThumbnailRatio(
-                        TaskView.CLIP_STATUS_AND_NAV_BARS) : 0f;
             }
-            int boxLength = Math.max(boxWidth, boxHeight);
 
             // Bound width/height to the box size.
-            if (thumbnailRatio == 0f) {
-                expectedWidth = boxWidth;
-                expectedHeight = boxHeight + thumbnailPadding;
-            } else if (thumbnailRatio > 1) {
-                expectedWidth = boxLength;
-                expectedHeight = (int) (boxLength / thumbnailRatio) + thumbnailPadding;
-            } else {
-                expectedWidth = (int) (boxLength * thumbnailRatio);
-                expectedHeight = boxLength + thumbnailPadding;
-            }
+            expectedWidth = boxWidth;
+            expectedHeight = boxHeight + thumbnailPadding;
 
             // Scale to to fit task Rect.
-            fullscreenScale = taskWidth / (float) boxWidth;
-
-            // In full screen, scale back TaskView to original size.
-            if (expectedWidth > boxWidth) {
-                fullscreenScale *= boxWidth / (float) expectedWidth;
-            } else if (expectedHeight - thumbnailPadding > boxHeight) {
-                fullscreenScale *= boxHeight / (float) (expectedHeight - thumbnailPadding);
-            }
+            nonGridScale = taskWidth / (float) boxWidth;
 
             // Align to top of task Rect.
             boxTranslationY = (expectedHeight - thumbnailPadding - taskHeight) / 2.0f;
         } else {
-            fullscreenScale = 1f;
+            nonGridScale = 1f;
             boxTranslationY = 0f;
             expectedWidth = ViewGroup.LayoutParams.MATCH_PARENT;
             expectedHeight = ViewGroup.LayoutParams.MATCH_PARENT;
         }
 
-        setFullscreenScale(fullscreenScale);
+        setNonGridScale(nonGridScale);
         setBoxTranslationY(boxTranslationY);
         if (params.width != expectedWidth || params.height != expectedHeight) {
             params.width = expectedWidth;
@@ -1407,20 +1360,15 @@
         }
     }
 
-    private float getFullscreenTrans(float endTranslation) {
-        float progress = FULLSCREEN_INTERPOLATOR.getInterpolation(mFullscreenProgress);
-        return Utilities.mapRange(progress, 0, endTranslation);
-    }
-
-    private float getNonFullscreenTrans(float endTranslation) {
-        return endTranslation - getFullscreenTrans(endTranslation);
-    }
-
     private float getGridTrans(float endTranslation) {
-        float progress = ACCEL_DEACCEL.getInterpolation(mGridProgress);
+        float progress = GRID_INTERPOLATOR.getInterpolation(mGridProgress);
         return Utilities.mapRange(progress, 0, endTranslation);
     }
 
+    private float getNonGridTrans(float endTranslation) {
+        return endTranslation - getGridTrans(endTranslation);
+    }
+
     public boolean isRunningTask() {
         if (getRecentsView() == null) {
             return false;
@@ -1487,8 +1435,8 @@
         /**
          * Sets the progress in range [0, 1]
          */
-        public void setProgress(float fullscreenProgress, float parentScale, int previewWidth,
-                DeviceProfile dp, PreviewPositionHelper pph) {
+        public void setProgress(float fullscreenProgress, float parentScale, float taskViewScale,
+                int previewWidth, DeviceProfile dp, PreviewPositionHelper pph) {
             RectF insets = pph.getInsetsToDrawInFullscreen();
 
             float currentInsetsLeft = insets.left * fullscreenProgress;
@@ -1499,7 +1447,7 @@
 
             mCurrentDrawnCornerRadius =
                     Utilities.mapRange(fullscreenProgress, mCornerRadius, fullscreenCornerRadius)
-                            / parentScale;
+                            / parentScale / taskViewScale;
 
             // We scaled the thumbnail to fit the content (excluding insets) within task view width.
             // Now that we are drawing left/right insets again, we need to scale down to fit them.
diff --git a/quickstep/tests/src/com/android/quickstep/NavigationBarRotationContextTest.java b/quickstep/tests/src/com/android/quickstep/NavigationBarRotationContextTest.java
new file mode 100644
index 0000000..af5819a
--- /dev/null
+++ b/quickstep/tests/src/com/android/quickstep/NavigationBarRotationContextTest.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.quickstep;
+
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+import android.content.Context;
+import android.graphics.drawable.AnimatedVectorDrawable;
+import android.view.View;
+import android.view.WindowInsetsController;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import com.android.launcher3.taskbar.contextual.RotationButton;
+import com.android.launcher3.taskbar.contextual.RotationButtonController;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.MockitoAnnotations;
+
+/** SysUI equivalent */
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class NavigationBarRotationContextTest {
+    private static final int DEFAULT_ROTATE = 0;
+    private static final int DEFAULT_DISPLAY = 0;
+
+
+    private RotationButtonController mRotationButtonController;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        Context mTargetContext = InstrumentationRegistry.getTargetContext();
+        final View view = new View(mTargetContext);
+        RotationButton rotationButton = mock(RotationButton.class);
+        mRotationButtonController = new RotationButtonController(mTargetContext, 0, 0);
+        mRotationButtonController.setRotationButton(rotationButton);
+        // Due to a mockito issue, only spy the object after setting the initial state
+        mRotationButtonController = spy(mRotationButtonController);
+        final AnimatedVectorDrawable kbd = mock(AnimatedVectorDrawable.class);
+        doReturn(view).when(rotationButton).getCurrentView();
+        doReturn(true).when(rotationButton).acceptRotationProposal();
+    }
+
+    @Test
+    public void testOnInvalidRotationProposal() {
+        mRotationButtonController.onRotationProposal(DEFAULT_ROTATE + 1,
+                false /* isValid */);
+        verify(mRotationButtonController, times(1))
+                .setRotateSuggestionButtonState(false /* visible */);
+    }
+
+    @Test
+    public void testOnSameRotationProposal() {
+        mRotationButtonController.onRotationProposal(DEFAULT_ROTATE,
+                true /* isValid */);
+        verify(mRotationButtonController, times(1))
+                .setRotateSuggestionButtonState(false /* visible */);
+    }
+
+    @Test
+    public void testOnRotationProposalShowButtonShowNav() {
+        // No navigation bar should not call to set visibility state
+        mRotationButtonController.onBehaviorChanged(DEFAULT_DISPLAY,
+                WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE);
+        mRotationButtonController.onTaskBarVisibilityChange(false /* showing */);
+        verify(mRotationButtonController, times(0)).setRotateSuggestionButtonState(
+                false /* visible */);
+        verify(mRotationButtonController, times(0)).setRotateSuggestionButtonState(
+                true /* visible */);
+
+        // No navigation bar with rotation change should not call to set visibility state
+        mRotationButtonController.onRotationProposal(DEFAULT_ROTATE + 1,
+                true /* isValid */);
+        verify(mRotationButtonController, times(0)).setRotateSuggestionButtonState(
+                false /* visible */);
+        verify(mRotationButtonController, times(0)).setRotateSuggestionButtonState(
+                true /* visible */);
+
+        // Since rotation has changed rotation should be pending, show mButton when showing nav bar
+        mRotationButtonController.onTaskBarVisibilityChange(true /* showing */);
+        verify(mRotationButtonController, times(1)).setRotateSuggestionButtonState(
+                true /* visible */);
+    }
+
+    @Test
+    public void testOnRotationProposalShowButton() {
+        // Navigation bar being visible should not call to set visibility state
+        mRotationButtonController.onTaskBarVisibilityChange(true /* showing */);
+        verify(mRotationButtonController, times(0))
+                .setRotateSuggestionButtonState(false /* visible */);
+        verify(mRotationButtonController, times(0))
+                .setRotateSuggestionButtonState(true /* visible */);
+
+        // Navigation bar is visible and rotation requested
+        mRotationButtonController.onRotationProposal(DEFAULT_ROTATE + 1,
+                true /* isValid */);
+        verify(mRotationButtonController, times(1))
+                .setRotateSuggestionButtonState(true /* visible */);
+    }
+}
diff --git a/res/color-v31/home_settings_switch_thumb_color.xml b/res/color-v31/home_settings_switch_thumb_color.xml
new file mode 100644
index 0000000..91d3d9b
--- /dev/null
+++ b/res/color-v31/home_settings_switch_thumb_color.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2021 The Android Open Source Project
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+-->
+
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- Disabled status of thumb -->
+    <item android:state_enabled="false"
+        android:color="@color/home_settings_thumb_off_color" />
+    <!-- Toggle off status of thumb -->
+    <item android:state_checked="false"
+        android:color="@color/home_settings_thumb_off_color" />
+    <!-- Enabled or toggle on status of thumb -->
+    <item android:color="@color/home_settings_state_on_color" />
+</selector>
diff --git a/res/color-v31/home_settings_switch_track_color.xml b/res/color-v31/home_settings_switch_track_color.xml
new file mode 100644
index 0000000..50784f5
--- /dev/null
+++ b/res/color-v31/home_settings_switch_track_color.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2021 The Android Open Source Project
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+-->
+
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- Disabled status of thumb -->
+    <item android:state_enabled="false"
+        android:color="@color/home_settings_track_off_color"
+        android:alpha="?android:attr/disabledAlpha" />
+    <!-- Toggle off status of thumb -->
+    <item android:state_checked="false"
+        android:color="@color/home_settings_track_off_color" />
+    <!-- Enabled or toggle on status of thumb -->
+    <item android:color="@color/home_settings_track_on_color" />
+</selector>
diff --git a/res/drawable-v31/home_settings_switch_thumb.xml b/res/drawable-v31/home_settings_switch_thumb.xml
new file mode 100644
index 0000000..260d5ea
--- /dev/null
+++ b/res/drawable-v31/home_settings_switch_thumb.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2021 The Android Open Source Project
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+-->
+
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:top="4dp"
+        android:left="4dp"
+        android:right="4dp"
+        android:bottom="4dp">
+        <shape android:shape="oval" >
+            <size android:height="20dp" android:width="20dp" />
+            <solid android:color="@color/home_settings_switch_thumb_color" />
+        </shape>
+    </item>
+</layer-list>
\ No newline at end of file
diff --git a/res/drawable-v31/home_settings_switch_track.xml b/res/drawable-v31/home_settings_switch_track.xml
new file mode 100644
index 0000000..502a300
--- /dev/null
+++ b/res/drawable-v31/home_settings_switch_track.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2021 The Android Open Source Project
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+-->
+
+<shape
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle"
+    android:width="52dp"
+    android:height="28dp">
+
+    <solid android:color="@color/home_settings_switch_track_color" />
+    <corners android:radius="35dp" />
+</shape>
\ No newline at end of file
diff --git a/res/layout-v31/settings_activity.xml b/res/layout-v31/settings_activity.xml
new file mode 100644
index 0000000..59e14f2
--- /dev/null
+++ b/res/layout-v31/settings_activity.xml
@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2021 The Android Open Source Project
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+-->
+<androidx.coordinatorlayout.widget.CoordinatorLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/content_parent"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:fitsSystemWindows="true">
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:id="@+id/app_bar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="?android:attr/colorPrimary"
+        android:fitsSystemWindows="true"
+        android:outlineAmbientShadowColor="@android:color/transparent"
+        android:outlineSpotShadowColor="@android:color/transparent"
+        android:theme="@style/HomeSettings.CollapsingToolbar">
+
+        <com.google.android.material.appbar.CollapsingToolbarLayout
+            android:id="@+id/collapsing_toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="226dp"
+            android:clipToPadding="false"
+            app:collapsedTitleTextAppearance="@style/HomeSettings.CollapsedToolbarTitle"
+            app:contentScrim="@color/home_settings_header_collapsed"
+            app:expandedTitleMarginEnd="24dp"
+            app:expandedTitleMarginStart="24dp"
+            app:expandedTitleTextAppearance="@style/HomeSettings.ExpandedToolbarTitle"
+            app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
+            app:maxLines="3"
+            app:scrimAnimationDuration="50"
+            app:scrimVisibleHeightTrigger="174dp"
+            app:statusBarScrim="@null"
+            app:titleCollapseMode="fade"
+            app:toolbarId="@id/action_bar">
+
+            <Toolbar
+                android:id="@+id/action_bar"
+                android:layout_width="match_parent"
+                android:layout_height="?attr/actionBarSize"
+                android:theme="?android:attr/actionBarTheme"
+                android:transitionName="shared_element_view"
+                app:layout_collapseMode="pin" />
+
+        </com.google.android.material.appbar.CollapsingToolbarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <FrameLayout
+        android:id="@+id/content_frame"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file
diff --git a/res/values-night-v31/colors.xml b/res/values-night-v31/colors.xml
new file mode 100644
index 0000000..2c1bc90
--- /dev/null
+++ b/res/values-night-v31/colors.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+/*
+* Copyright (C) 2021 The Android Open Source Project
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*      http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+-->
+
+<resources>
+    <color name="home_settings_header_accent">@android:color/system_accent1_100</color>
+    <color name="home_settings_header_collapsed">@android:color/system_neutral1_700</color>
+    <color name="home_settings_header_expanded">@android:color/system_neutral1_900</color>
+
+    <color name="home_settings_thumb_off_color">@android:color/system_neutral2_300</color>
+    <color name="home_settings_track_on_color">@android:color/system_accent2_700</color>
+    <color name="home_settings_track_off_color">@android:color/system_neutral1_700</color>
+</resources>
\ No newline at end of file
diff --git a/res/values-v31/colors.xml b/res/values-v31/colors.xml
index 38a0894..dc0c7a0 100644
--- a/res/values-v31/colors.xml
+++ b/res/values-v31/colors.xml
@@ -40,4 +40,16 @@
     <color name="folder_background_dark" android:lstar="30">@android:color/system_neutral2_800</color>
   
     <color name="folder_dot_color">@android:color/system_accent2_50</color>
+
+
+    <color name="home_settings_header_accent">@android:color/system_accent1_600</color>
+    <color name="home_settings_header_collapsed">@android:color/system_neutral1_100</color>
+    <color name="home_settings_header_expanded">@android:color/system_neutral1_50</color>
+
+    <color name="home_settings_state_on_color">@android:color/system_accent1_100</color>
+    <color name="home_settings_state_off_color">@android:color/system_accent2_100</color>
+    <color name="home_settings_thumb_off_color">@android:color/system_neutral2_100</color>
+    <color name="home_settings_track_on_color">@android:color/system_accent1_600</color>
+    <color name="home_settings_track_off_color">@android:color/system_neutral2_600</color>
+
 </resources>
diff --git a/res/values-v31/config.xml b/res/values-v31/config.xml
new file mode 100644
index 0000000..afb9e6d
--- /dev/null
+++ b/res/values-v31/config.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    Copyright (C) 2021 The Android Open Source Project
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+  -->
+<resources>
+    <bool name="home_settings_icon_space_reserved">false</bool>
+    <bool name="home_settings_allow_divider">false</bool>
+</resources>
\ No newline at end of file
diff --git a/res/values-v31/styles.xml b/res/values-v31/styles.xml
new file mode 100644
index 0000000..0d2fce0
--- /dev/null
+++ b/res/values-v31/styles.xml
@@ -0,0 +1,95 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+* Copyright (C) 2021 The Android Open Source Project
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*      http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+-->
+
+<resources>
+
+    <style name="HomeSettings.Theme" parent="@android:style/Theme.DeviceDefault.Settings">
+        <item name="android:listPreferredItemPaddingEnd">16dp</item>
+        <item name="android:listPreferredItemPaddingStart">24dp</item>
+        <item name="android:navigationBarColor">@android:color/transparent</item>
+        <item name="android:statusBarColor">@android:color/transparent</item>
+        <item name="android:switchStyle">@style/HomeSettings.SwitchStyle</item>
+        <item name="android:textAppearanceListItem">@style/HomeSettings.PreferenceTitle</item>
+        <item name="android:windowActionBar">false</item>
+        <item name="android:windowNoTitle">true</item>
+        <item name="preferenceTheme">@style/HomeSettings.PreferenceTheme</item>
+    </style>
+
+    <style name="HomeSettings.PreferenceTheme" parent="@style/PreferenceThemeOverlay">
+        <item name="preferenceCategoryStyle">@style/HomeSettings.CategoryStyle</item>
+        <item name="preferenceCategoryTitleTextAppearance">@style/HomeSettings.CategoryTitle</item>
+        <item name="preferenceFragmentCompatStyle">@style/HomeSettings.FragmentCompatStyle</item>
+        <item name="preferenceScreenStyle">@style/HomeSettings.PreferenceScreenStyle</item>
+        <item name="preferenceStyle">@style/HomeSettings.PreferenceStyle</item>
+        <item name="switchPreferenceStyle">@style/HomeSettings.SwitchPreferenceStyle</item>
+    </style>
+
+    <style name="HomeSettings.CategoryStyle" parent="@style/Preference.Category.Material">
+        <item name="allowDividerAbove">@bool/home_settings_allow_divider</item>
+        <item name="allowDividerBelow">@bool/home_settings_allow_divider</item>
+        <item name="iconSpaceReserved">@bool/home_settings_icon_space_reserved</item>
+    </style>
+
+    <style name="HomeSettings.PreferenceStyle" parent="@style/Preference.Material">
+        <item name="iconSpaceReserved">@bool/home_settings_icon_space_reserved</item>
+    </style>
+
+    <style name="HomeSettings.PreferenceScreenStyle"
+            parent="@style/Preference.PreferenceScreen.Material">
+        <item name="iconSpaceReserved">@bool/home_settings_icon_space_reserved</item>
+    </style>
+
+    <style name="HomeSettings.SwitchPreferenceStyle"
+            parent="@style/Preference.SwitchPreference.Material">
+        <item name="iconSpaceReserved">@bool/home_settings_icon_space_reserved</item>
+    </style>
+
+    <style name="HomeSettings.SwitchStyle"
+            parent="@android:style/Widget.Material.CompoundButton.Switch">
+        <item name="android:switchMinWidth">52dp</item>
+        <item name="android:thumb">@drawable/home_settings_switch_thumb</item>
+        <item name="android:track">@drawable/home_settings_switch_track</item>
+    </style>
+
+    <style name="HomeSettings.PreferenceTitle"
+            parent="@android:style/TextAppearance.Material.Subhead">
+        <item name="android:fontFamily">google-sans</item>
+        <item name="android:textSize">20sp</item>
+    </style>
+
+    <style name="HomeSettings.CategoryTitle" parent="@android:style/TextAppearance.Material.Body2">
+        <item name="android:fontFamily">google-sans-text-medium</item>
+    </style>
+
+    <style name="HomeSettings.CollapsingToolbar" parent="@style/Theme.MaterialComponents.DayNight">
+        <item name="colorAccent">@color/home_settings_header_accent</item>
+        <item name="colorPrimary">@color/home_settings_header_expanded</item>
+        <item name="elevationOverlayColor">?attr/colorPrimary</item>
+        <item name="elevationOverlayEnabled">true</item>
+    </style>
+
+    <style name="HomeSettings.CollapsedToolbarTitle"
+            parent="@android:style/TextAppearance.DeviceDefault.Widget.ActionBar.Title">
+        <item name="android:fontFamily">google-sans</item>
+    </style>
+
+    <style name="HomeSettings.ExpandedToolbarTitle" parent="HomeSettings.CollapsedToolbarTitle">
+        <item name="android:textSize">36sp</item>
+    </style>
+</resources>
\ No newline at end of file
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index e8d3212..c930480 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -305,6 +305,10 @@
 
 <!-- Taskbar related (placeholders to compile in Launcher3 without Quickstep) -->
     <dimen name="taskbar_size">0dp</dimen>
+    <dimen name="qsb_widget_height">0dp</dimen>
+    <dimen name="taskbar_icon_size">44dp</dimen>
+    <!-- Note that this applies to both sides of all icons, so visible space is double this. -->
+    <dimen name="taskbar_icon_spacing">8dp</dimen>
 
     <!-- Size of the maximum radius for the enforced rounded rectangles. -->
     <dimen name="enforced_rounded_corner_max_radius">16dp</dimen>
diff --git a/res/values/styles.xml b/res/values/styles.xml
index 6f7d727..38bc272 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -154,18 +154,18 @@
     <style name="AppTheme.Dark.DarkMainColor" parent="@style/LauncherTheme.Dark.DarkMainColor" />
     <style name="AppTheme.Dark.DarkText" parent="@style/LauncherTheme.Dark.DarkText" />
 
-    <style name="HomeSettingsTheme" parent="@android:style/Theme.DeviceDefault.Settings">
+    <style name="HomeSettings.Theme" parent="@android:style/Theme.DeviceDefault.Settings">
         <item name="android:navigationBarColor">?android:colorPrimaryDark</item>
         <item name="android:windowActionBar">false</item>
         <item name="android:windowNoTitle">true</item>
-        <item name="preferenceTheme">@style/HomeSettingsPreferenceTheme</item>
+        <item name="preferenceTheme">@style/HomeSettings.PreferenceTheme</item>
     </style>
 
-    <style name="HomeSettingsPreferenceTheme" parent="@style/PreferenceThemeOverlay.v14.Material">
-        <item name="preferenceFragmentCompatStyle">@style/HomeSettingsFragmentCompatStyle</item>
+    <style name="HomeSettings.PreferenceTheme" parent="@style/PreferenceThemeOverlay.v14.Material">
+        <item name="preferenceFragmentCompatStyle">@style/HomeSettings.FragmentCompatStyle</item>
     </style>
 
-    <style name="HomeSettingsFragmentCompatStyle" parent="@style/PreferenceFragment.Material">
+    <style name="HomeSettings.FragmentCompatStyle" parent="@style/PreferenceFragment.Material">
         <item name="android:layout">@layout/home_settings</item>
     </style>
 
diff --git a/robolectric_tests/src/com/android/launcher3/model/ModelMultiCallbacksTest.java b/robolectric_tests/src/com/android/launcher3/model/ModelMultiCallbacksTest.java
index a2abfd5..275cf81 100644
--- a/robolectric_tests/src/com/android/launcher3/model/ModelMultiCallbacksTest.java
+++ b/robolectric_tests/src/com/android/launcher3/model/ModelMultiCallbacksTest.java
@@ -26,12 +26,12 @@
 
 import android.os.Process;
 
-import com.android.launcher3.PagedView;
 import com.android.launcher3.model.BgDataModel.Callbacks;
 import com.android.launcher3.model.data.AppInfo;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.shadows.ShadowLooperExecutor;
 import com.android.launcher3.util.Executors;
+import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.LauncherLayoutBuilder;
 import com.android.launcher3.util.LauncherModelHelper;
 import com.android.launcher3.util.LooperExecutor;
@@ -92,7 +92,7 @@
         // Add a new callback
         cb1.reset();
         MyCallbacks cb2 = spy(MyCallbacks.class);
-        cb2.mPageToBindSync = 2;
+        cb2.mPageToBindSync = IntSet.wrap(2);
         mModelHelper.getModel().addCallbacksAndLoad(cb2);
 
         waitForLoaderAndTempMainThread();
@@ -178,16 +178,16 @@
     private abstract static class MyCallbacks implements Callbacks {
 
         final List<ItemInfo> mItems = new ArrayList<>();
-        int mPageToBindSync = 0;
-        int mPageBoundSync = PagedView.INVALID_PAGE;
+        IntSet mPageToBindSync = IntSet.wrap(0);
+        IntSet mPageBoundSync = new IntSet();
         ViewOnDrawExecutor mDeferredExecutor;
         AppInfo[] mAppInfos;
 
         MyCallbacks() { }
 
         @Override
-        public void onPageBoundSynchronously(int page) {
-            mPageBoundSync = page;
+        public void onPagesBoundSynchronously(IntSet pages) {
+            mPageBoundSync = pages;
         }
 
         @Override
@@ -206,13 +206,13 @@
         }
 
         @Override
-        public int getPageToBindSynchronously() {
+        public IntSet getPagesToBindSynchronously() {
             return mPageToBindSync;
         }
 
         public void reset() {
             mItems.clear();
-            mPageBoundSync = PagedView.INVALID_PAGE;
+            mPageBoundSync = new IntSet();
             mDeferredExecutor = null;
             mAppInfos = null;
         }
diff --git a/robolectric_tests/src/com/android/launcher3/util/LauncherPageRestoreHelperTest.java b/robolectric_tests/src/com/android/launcher3/util/LauncherPageRestoreHelperTest.java
new file mode 100644
index 0000000..51f5851
--- /dev/null
+++ b/robolectric_tests/src/com/android/launcher3/util/LauncherPageRestoreHelperTest.java
@@ -0,0 +1,224 @@
+/**
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.util;
+
+import android.os.Bundle;
+
+import com.android.launcher3.LauncherPageRestoreHelper;
+import com.android.launcher3.Workspace;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.Mockito.when;
+
+@RunWith(RobolectricTestRunner.class)
+public class LauncherPageRestoreHelperTest {
+
+    // Type: int
+    private static final String RUNTIME_STATE_CURRENT_SCREEN = "launcher.current_screen";
+    // Type: int
+    private static final String RUNTIME_STATE_CURRENT_SCREEN_COUNT =
+            "launcher.current_screen_count";
+
+    private LauncherPageRestoreHelper mPageRestoreHelper;
+    private Bundle mState;
+
+    @Mock
+    private Workspace mWorkspace;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mPageRestoreHelper = new LauncherPageRestoreHelper(mWorkspace);
+        mState = new Bundle();
+    }
+
+    @Test
+    public void givenNoChildrenInWorkspace_whenSavePages_thenNothingSaved() {
+        when(mWorkspace.getChildCount()).thenReturn(0);
+
+        mPageRestoreHelper.savePagesToRestore(mState);
+
+        assertFalse(mState.containsKey(RUNTIME_STATE_CURRENT_SCREEN_COUNT));
+        assertFalse(mState.containsKey(RUNTIME_STATE_CURRENT_SCREEN));
+    }
+
+    @Test
+    public void givenMultipleCurrentPages_whenSavePages_thenSavedCorrectly() {
+        when(mWorkspace.getChildCount()).thenReturn(5);
+        when(mWorkspace.getCurrentPage()).thenReturn(2);
+        givenPanelCount(2);
+
+        mPageRestoreHelper.savePagesToRestore(mState);
+
+        assertEquals(5, mState.getInt(RUNTIME_STATE_CURRENT_SCREEN_COUNT));
+        assertEquals(2, mState.getInt(RUNTIME_STATE_CURRENT_SCREEN));
+    }
+
+    @Test
+    public void givenNullSavedState_whenRestorePages_thenReturnEmptyIntSet() {
+        IntSet result = mPageRestoreHelper.getPagesToRestore(null);
+
+        assertTrue(result.isEmpty());
+    }
+
+    @Test
+    public void givenTotalPageCountMissing_whenRestorePages_thenReturnEmptyIntSet() {
+        givenSavedCurrentPage(1);
+        givenPanelCount(1);
+
+        IntSet result = mPageRestoreHelper.getPagesToRestore(mState);
+
+        assertTrue(result.isEmpty());
+    }
+
+    @Test
+    public void givenCurrentPageMissing_whenRestorePages_thenReturnEmptyIntSet() {
+        givenSavedPageCount(3);
+        givenPanelCount(2);
+
+        IntSet result = mPageRestoreHelper.getPagesToRestore(mState);
+
+        assertTrue(result.isEmpty());
+    }
+
+    @Test
+    public void givenOnePanel_whenRestorePages_thenReturnThatPage() {
+        givenSavedCurrentPage(2);
+        givenSavedPageCount(5);
+        givenPanelCount(1);
+
+        IntSet result = mPageRestoreHelper.getPagesToRestore(mState);
+
+        assertEquals(1, result.size());
+        assertEquals(2, result.getArray().get(0));
+    }
+
+    @Test
+    public void givenTwoPanelOnFirstPages_whenRestorePages_thenReturnThosePages() {
+        givenSavedCurrentPage(0, 1);
+        givenSavedPageCount(2);
+        givenPanelCount(2);
+
+        IntSet result = mPageRestoreHelper.getPagesToRestore(mState);
+
+        assertEquals(IntSet.wrap(0, 1), result);
+    }
+
+    @Test
+    public void givenTwoPanelOnMiddlePages_whenRestorePages_thenReturnThosePages() {
+        givenSavedCurrentPage(2, 3);
+        givenSavedPageCount(5);
+        givenPanelCount(2);
+
+        IntSet result = mPageRestoreHelper.getPagesToRestore(mState);
+
+        assertEquals(IntSet.wrap(2, 3), result);
+    }
+
+    @Test
+    public void givenTwoPanelOnLastPage_whenRestorePages_thenReturnOnlyLastPage() {
+        // The device has two panel home but the current page is the last page, so we don't have
+        // a right panel, only the left one.
+        givenSavedCurrentPage(2);
+        givenSavedPageCount(3);
+        givenPanelCount(2);
+
+        IntSet result = mPageRestoreHelper.getPagesToRestore(mState);
+
+        assertEquals(IntSet.wrap(2), result);
+    }
+
+    @Test
+    public void givenOnlyOnePageAndPhoneFolding_whenRestorePages_thenReturnOnlyOnePage() {
+        givenSavedCurrentPage(0);
+        givenSavedPageCount(1);
+        givenPanelCount(1);
+
+        IntSet result = mPageRestoreHelper.getPagesToRestore(mState);
+
+        assertEquals(IntSet.wrap(0), result);
+    }
+
+    @Test
+    public void givenPhoneFolding_whenRestorePages_thenReturnOnlyTheFirstCurrentPage() {
+        givenSavedCurrentPage(2, 3);
+        givenSavedPageCount(4);
+        givenPanelCount(1);
+
+        IntSet result = mPageRestoreHelper.getPagesToRestore(mState);
+
+        assertEquals(IntSet.wrap(2), result);
+    }
+
+    @Test
+    public void givenPhoneUnfolding_whenRestorePages_thenReturnCurrentPagePlusTheNextOne() {
+        givenSavedCurrentPage(2);
+        givenSavedPageCount(4);
+        givenPanelCount(2);
+
+        IntSet result = mPageRestoreHelper.getPagesToRestore(mState);
+
+        assertEquals(IntSet.wrap(2, 3), result);
+    }
+
+    @Test
+    public void givenPhoneUnfoldingOnLastPage_whenRestorePages_thenReturnOnlyLastPage() {
+        givenSavedCurrentPage(4);
+        givenSavedPageCount(5);
+        givenPanelCount(2);
+
+        IntSet result = mPageRestoreHelper.getPagesToRestore(mState);
+
+        assertEquals(IntSet.wrap(4), result);
+    }
+
+    @Test
+    public void givenOnlyOnePageAndPhoneUnfolding_whenRestorePages_thenReturnOnlyOnePage() {
+        givenSavedCurrentPage(0);
+        givenSavedPageCount(1);
+        givenPanelCount(2);
+
+        IntSet result = mPageRestoreHelper.getPagesToRestore(mState);
+
+        assertEquals(IntSet.wrap(0), result);
+    }
+
+    private void givenPanelCount(int panelCount) {
+        when(mWorkspace.getPanelCount()).thenReturn(panelCount);
+        when(mWorkspace.getLeftmostVisiblePageForIndex(anyInt())).thenAnswer(invocation -> {
+            int pageIndex = invocation.getArgument(0);
+            return pageIndex * panelCount / panelCount;
+        });
+    }
+
+    private void givenSavedPageCount(int pageCount) {
+        mState.putInt(RUNTIME_STATE_CURRENT_SCREEN_COUNT, pageCount);
+    }
+
+    private void givenSavedCurrentPage(int... pages) {
+        mState.putInt(RUNTIME_STATE_CURRENT_SCREEN, pages[0]);
+    }
+}
diff --git a/src/com/android/launcher3/BubbleTextView.java b/src/com/android/launcher3/BubbleTextView.java
index ddbd425..f800cf6 100644
--- a/src/com/android/launcher3/BubbleTextView.java
+++ b/src/com/android/launcher3/BubbleTextView.java
@@ -407,7 +407,7 @@
         }
     }
 
-    void clearPressedBackground() {
+    public void clearPressedBackground() {
         setPressed(false);
         setStayPressed(false);
     }
@@ -853,8 +853,9 @@
         switch (display) {
             case DISPLAY_ALL_APPS:
                 return grid.allAppsIconSizePx;
-            case DISPLAY_WORKSPACE:
             case DISPLAY_FOLDER:
+                return grid.folderChildIconSizePx;
+            case DISPLAY_WORKSPACE:
             default:
                 return grid.iconSizePx;
         }
diff --git a/src/com/android/launcher3/DeleteDropTarget.java b/src/com/android/launcher3/DeleteDropTarget.java
index 80ec192..ba55834 100644
--- a/src/com/android/launcher3/DeleteDropTarget.java
+++ b/src/com/android/launcher3/DeleteDropTarget.java
@@ -33,6 +33,7 @@
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.LauncherAppWidgetInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
+import com.android.launcher3.util.IntSet;
 import com.android.launcher3.views.Snackbar;
 
 public class DeleteDropTarget extends ButtonDropTarget {
@@ -131,7 +132,7 @@
             onAccessibilityDrop(null, item);
             ModelWriter modelWriter = mLauncher.getModelWriter();
             Runnable onUndoClicked = () -> {
-                mLauncher.setPageToBindSynchronously(itemPage);
+                mLauncher.setPagesToBindSynchronously(IntSet.wrap(itemPage));
                 modelWriter.abortDelete();
                 mLauncher.getStatsLogManager().logger().log(LAUNCHER_UNDO);
             };
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index e9245b0..2da7ac3 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -44,6 +44,7 @@
 import com.android.launcher3.icons.DotRenderer;
 import com.android.launcher3.icons.GraphicsUtils;
 import com.android.launcher3.icons.IconNormalizer;
+import com.android.launcher3.uioverrides.ApiWrapper;
 import com.android.launcher3.util.DisplayController;
 import com.android.launcher3.util.DisplayController.Info;
 import com.android.launcher3.util.WindowBounds;
@@ -54,6 +55,8 @@
 public class DeviceProfile {
 
     private static final int DEFAULT_DOT_SIZE = 100;
+    // Ratio of empty space, qsb should take up to appear visually centered.
+    private static final float QSB_CENTER_FACTOR = .325f;
 
     public final InvariantDeviceProfile inv;
     private final Info mInfo;
@@ -156,6 +159,7 @@
     // Start is the side next to the nav bar, end is the side next to the workspace
     public final int hotseatBarSidePaddingStartPx;
     public final int hotseatBarSidePaddingEndPx;
+    public final int hotseatQsbHeight;
 
     // All apps
     public int allAppsOpenVerticalTranslate;
@@ -240,6 +244,7 @@
         mMetrics = context.getResources().getDisplayMetrics();
         final Resources res = context.getResources();
 
+        hotseatQsbHeight = res.getDimensionPixelSize(R.dimen.qsb_widget_height);
         isTaskbarPresent = isTablet && FeatureFlags.ENABLE_TASKBAR.get();
         if (isTaskbarPresent) {
             // Taskbar will be added later, but provides bottom insets that we should subtract
@@ -740,7 +745,10 @@
         }
     }
 
-    public Rect getHotseatLayoutPadding() {
+    /**
+     * Returns the padding for hotseat view
+     */
+    public Rect getHotseatLayoutPadding(Context context) {
         if (isVerticalBarLayout()) {
             if (isSeascape()) {
                 mHotseatPadding.set(mInsets.left + hotseatBarSidePaddingStartPx,
@@ -749,6 +757,30 @@
                 mHotseatPadding.set(hotseatBarSidePaddingEndPx, mInsets.top,
                         mInsets.right + hotseatBarSidePaddingStartPx, mInsets.bottom);
             }
+        } else if (isTaskbarPresent) {
+            int hotseatHeight = workspacePadding.bottom + taskbarSize;
+            int taskbarOffset = getTaskbarOffsetY();
+            int hotseatTopDiff = hotseatHeight - taskbarSize - taskbarOffset;
+
+            int startOffset = ApiWrapper.getHotseatStartOffset(context);
+            int requiredWidth = iconSizePx * numShownHotseatIcons;
+
+            Resources res = context.getResources();
+            float taskbarIconSize = res.getDimension(R.dimen.taskbar_icon_size);
+            float taskbarIconSpacing = 2 * res.getDimension(R.dimen.taskbar_icon_spacing);
+            int maxSize = (int) (requiredWidth
+                    * (taskbarIconSize + taskbarIconSpacing) / taskbarIconSize);
+            int hotseatSize = Math.min(maxSize, availableWidthPx - startOffset);
+            int sideSpacing = (availableWidthPx - hotseatSize) / 2;
+            mHotseatPadding.set(sideSpacing, hotseatTopDiff, sideSpacing, taskbarOffset);
+
+            if (startOffset > sideSpacing) {
+                int diff = Utilities.isRtl(context.getResources())
+                        ? sideSpacing - startOffset
+                        : startOffset - sideSpacing;
+                mHotseatPadding.left += diff;
+                mHotseatPadding.right -= diff;
+            }
         } else {
             // We want the edges of the hotseat to line up with the edges of the workspace, but the
             // icons in the hotseat are a different size, and so don't line up perfectly. To account
@@ -769,6 +801,24 @@
     }
 
     /**
+     * Returns the number of pixels the QSB is translated from the bottom of the screen.
+     */
+    public int getQsbOffsetY() {
+        int freeSpace = isTaskbarPresent
+                ? workspacePadding.bottom
+                : hotseatBarSizePx - hotseatCellHeightPx - hotseatQsbHeight;
+        return (int) (freeSpace * QSB_CENTER_FACTOR)
+                + (isTaskbarPresent ? taskbarSize : getInsets().bottom);
+    }
+
+    /**
+     * Returns the number of pixels the taskbar is translated from the bottom of the screen.
+     */
+    public int getTaskbarOffsetY() {
+        return (getQsbOffsetY() - taskbarSize) / 2;
+    }
+
+    /**
      * @return the bounds for which the open folders should be contained within
      */
     public Rect getAbsoluteOpenFolderBounds() {
diff --git a/src/com/android/launcher3/Hotseat.java b/src/com/android/launcher3/Hotseat.java
index ff380ce..b3ae15e 100644
--- a/src/com/android/launcher3/Hotseat.java
+++ b/src/com/android/launcher3/Hotseat.java
@@ -49,8 +49,6 @@
     private final View mQsb;
     private final int mQsbHeight;
 
-    private final int mTaskbarViewHeight;
-
     public Hotseat(Context context) {
         this(context, null);
     }
@@ -63,10 +61,9 @@
         super(context, attrs, defStyle);
 
         mQsb = LayoutInflater.from(context).inflate(R.layout.search_container_hotseat, this, false);
-        mQsbHeight = mQsb.getLayoutParams().height;
         addView(mQsb);
 
-        mTaskbarViewHeight = context.getResources().getDimensionPixelSize(R.dimen.taskbar_size);
+        mQsbHeight = getResources().getDimensionPixelSize(R.dimen.qsb_widget_height);
     }
 
     /**
@@ -114,18 +111,13 @@
             lp.gravity = Gravity.BOTTOM;
             lp.width = ViewGroup.LayoutParams.MATCH_PARENT;
             lp.height = (grid.isTaskbarPresent
-                        ? grid.workspacePadding.bottom
+                    ? grid.workspacePadding.bottom
                         : grid.hotseatBarSizePx)
                     + (grid.isTaskbarPresent ? grid.taskbarSize : insets.bottom);
         }
 
-        if (!grid.isTaskbarPresent) {
-            // When taskbar is present, we set the padding separately to ensure a seamless visual
-            // handoff between taskbar and hotseat during drag and drop.
-            Rect padding = grid.getHotseatLayoutPadding();
-            setPadding(padding.left, padding.top, padding.right, padding.bottom);
-        }
-
+        Rect padding = grid.getHotseatLayoutPadding(getContext());
+        setPadding(padding.left, padding.top, padding.right, padding.bottom);
         setLayoutParams(lp);
         InsettableFrameLayout.dispatchInsets(this, insets);
     }
@@ -193,31 +185,12 @@
         int left = (r - l - qsbWidth) / 2;
         int right = left + qsbWidth;
 
-        int bottom = b - t - getQsbOffsetY();
+        int bottom = b - t - mActivity.getDeviceProfile().getQsbOffsetY();
         int top = bottom - mQsbHeight;
         mQsb.layout(left, top, right, bottom);
     }
 
     /**
-     * Returns the number of pixels the QSB is translated from the bottom of the screen.
-     */
-    private int getQsbOffsetY() {
-        DeviceProfile dp = mActivity.getDeviceProfile();
-        int freeSpace = dp.isTaskbarPresent
-                ? dp.workspacePadding.bottom
-                : dp.hotseatBarSizePx - dp.hotseatCellHeightPx - mQsbHeight;
-        return (int) (freeSpace * QSB_CENTER_FACTOR)
-                + (dp.isTaskbarPresent ? dp.taskbarSize : dp.getInsets().bottom);
-    }
-
-    /**
-     * Returns the number of pixels the taskbar is translated from the bottom of the screen.
-     */
-    public int getTaskbarOffsetY() {
-        return (getQsbOffsetY() - mTaskbarViewHeight) / 2;
-    }
-
-    /**
      * Sets the alpha value of just our ShortcutAndWidgetContainer.
      */
     public void setIconsAlpha(float alpha) {
diff --git a/src/com/android/launcher3/InvariantDeviceProfile.java b/src/com/android/launcher3/InvariantDeviceProfile.java
index 318dde1..115d3ae 100644
--- a/src/com/android/launcher3/InvariantDeviceProfile.java
+++ b/src/com/android/launcher3/InvariantDeviceProfile.java
@@ -36,7 +36,6 @@
 import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.util.DisplayMetrics;
-import android.util.Log;
 import android.util.SparseArray;
 import android.util.TypedValue;
 import android.util.Xml;
@@ -45,7 +44,6 @@
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 
-import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.util.DisplayController;
 import com.android.launcher3.util.DisplayController.Info;
 import com.android.launcher3.util.IntArray;
@@ -250,17 +248,10 @@
 
     private String initGrid(Context context, String gridName) {
         Info displayInfo = DisplayController.INSTANCE.get(context).getInfo();
-        // Determine if we have split display
-
-        boolean isTablet = false, isPhone = false;
-        for (WindowBounds bounds : displayInfo.supportedBounds) {
-            if (displayInfo.isTablet(bounds)) {
-                isTablet = true;
-            } else {
-                isPhone = true;
-            }
-        }
-        boolean isSplitDisplay = isPhone && isTablet && ENABLE_TWO_PANEL_HOME.get();
+        // Each screen has two profiles (portrait/landscape), so devices with four or more
+        // supported profiles implies two or more internal displays.
+        boolean isSplitDisplay =
+                displayInfo.supportedBounds.size() >= 4 && ENABLE_TWO_PANEL_HOME.get();
 
         ArrayList<DisplayOption> allOptions =
                 getPredefinedDeviceProfiles(context, gridName, isSplitDisplay);
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index c5d280d..5a9257d 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -106,6 +106,7 @@
 import android.widget.Toast;
 
 import androidx.annotation.CallSuper;
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.StringRes;
 import androidx.annotation.VisibleForTesting;
@@ -165,6 +166,7 @@
 import com.android.launcher3.util.ActivityTracker;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.IntArray;
+import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.util.MultiValueAlpha;
 import com.android.launcher3.util.MultiValueAlpha.AlphaProperty;
@@ -246,8 +248,6 @@
     protected static final int REQUEST_LAST = 100;
 
     // Type: int
-    private static final String RUNTIME_STATE_CURRENT_SCREEN = "launcher.current_screen";
-    // Type: int
     private static final String RUNTIME_STATE = "launcher.state";
     // Type: PendingRequestArgs
     private static final String RUNTIME_STATE_PENDING_REQUEST_ARGS = "launcher.request_args";
@@ -285,6 +285,8 @@
     private WidgetManagerHelper mAppWidgetManager;
     private LauncherAppWidgetHost mAppWidgetHost;
 
+    private LauncherPageRestoreHelper mPageRestoreHelper;
+
     private final int[] mTmpAddItemCellCoordinates = new int[2];
 
     @Thunk
@@ -320,8 +322,8 @@
 
     private PopupDataProvider mPopupDataProvider;
 
-    private int mSynchronouslyBoundPage = PagedView.INVALID_PAGE;
-    private int mPageToBindSynchronously = PagedView.INVALID_PAGE;
+    private IntSet mSynchronouslyBoundPages = new IntSet();
+    private IntSet mPagesToBindSynchronously = new IntSet();
 
     // We only want to get the SharedPreferences once since it does an FS stat each time we get
     // it from the context.
@@ -456,13 +458,10 @@
         restoreState(savedInstanceState);
         mStateManager.reapplyState();
 
-        // We only load the page synchronously if the user rotates (or triggers a
-        // configuration change) while launcher is in the foreground
-        int currentScreen = PagedView.INVALID_PAGE;
+        mPageRestoreHelper = new LauncherPageRestoreHelper(mWorkspace);
         if (savedInstanceState != null) {
-            currentScreen = savedInstanceState.getInt(RUNTIME_STATE_CURRENT_SCREEN, currentScreen);
+            mPagesToBindSynchronously = mPageRestoreHelper.getPagesToRestore(savedInstanceState);
         }
-        mPageToBindSynchronously = currentScreen;
 
         if (!mModel.addCallbacksAndLoad(this)) {
             if (!internalStateHandled) {
@@ -1187,6 +1186,7 @@
         // Until the workspace is bound, ensure that we keep the wallpaper offset locked to the
         // default state, otherwise we will update to the wrong offsets in RTL
         mWorkspace.lockWallpaperToDefaultPage();
+        mWorkspace.bindAndInitLeftPanel();
         mWorkspace.bindAndInitFirstWorkspaceScreen(null /* recycled qsb */);
         mDragController.addDragListener(mWorkspace);
 
@@ -1307,7 +1307,8 @@
         }
     }
 
-    public FolderIcon findFolderIcon(final int folderIconId) {
+    @Override
+    public @Nullable FolderIcon findFolderIcon(final int folderIconId) {
         return (FolderIcon) mWorkspace.getHomescreenIconByItemId(folderIconId);
     }
 
@@ -1542,18 +1543,17 @@
     @Override
     public void onRestoreInstanceState(Bundle state) {
         super.onRestoreInstanceState(state);
-        mWorkspace.restoreInstanceStateForChild(mSynchronouslyBoundPage);
+        if (mSynchronouslyBoundPages != null) {
+            mSynchronouslyBoundPages.forEach(page -> mWorkspace.restoreInstanceStateForChild(page));
+        }
     }
 
     @Override
     protected void onSaveInstanceState(Bundle outState) {
-        if (mWorkspace.getChildCount() > 0) {
-            outState.putInt(RUNTIME_STATE_CURRENT_SCREEN, mWorkspace.getNextPage());
+        mPageRestoreHelper.savePagesToRestore(outState);
 
-        }
         outState.putInt(RUNTIME_STATE, mStateManager.getState().ordinal);
 
-
         AbstractFloatingView widgets = AbstractFloatingView
                 .getOpenView(this, AbstractFloatingView.TYPE_WIDGETS_FULL_SHEET);
         if (widgets != null) {
@@ -2032,24 +2032,24 @@
     }
 
     /**
-     * Sets the next page to bind synchronously on next bind.
-     * @param page
+     * Sets the next pages to bind synchronously on next bind.
+     * @param pages should not be null.
      */
-    public void setPageToBindSynchronously(int page) {
-        mPageToBindSynchronously = page;
+    public void setPagesToBindSynchronously(@NonNull IntSet pages) {
+        mPagesToBindSynchronously = pages;
     }
 
     /**
      * Implementation of the method from LauncherModel.Callbacks.
      */
     @Override
-    public int getPageToBindSynchronously() {
-        if (mPageToBindSynchronously != PagedView.INVALID_PAGE) {
-            return mPageToBindSynchronously;
-        } else  if (mWorkspace != null) {
-            return mWorkspace.getCurrentPage();
+    public IntSet getPagesToBindSynchronously() {
+        if (mPagesToBindSynchronously != null && !mPagesToBindSynchronously.isEmpty()) {
+            return mPagesToBindSynchronously;
+        } else if (mWorkspace != null) {
+            return mWorkspace.getVisiblePageIndices();
         } else {
-            return 0;
+            return new IntSet();
         }
     }
 
@@ -2098,11 +2098,16 @@
 
     @Override
     public void bindScreens(IntArray orderedScreenIds) {
-        // Make sure the first screen is always at the start.
+        // Make sure the first screen is at the start if there's no widget panel,
+        // or on the second place if the first is the widget panel
+        boolean isLeftPanelShown =
+                mWorkspace.mWorkspaceScreens.containsKey(Workspace.LEFT_PANEL_ID);
+        int firstScreenPosition = isLeftPanelShown && orderedScreenIds.size() > 1 ? 1 : 0;
+
         if (FeatureFlags.QSB_ON_FIRST_SCREEN &&
-                orderedScreenIds.indexOf(Workspace.FIRST_SCREEN_ID) != 0) {
+                orderedScreenIds.indexOf(Workspace.FIRST_SCREEN_ID) != firstScreenPosition) {
             orderedScreenIds.removeValue(Workspace.FIRST_SCREEN_ID);
-            orderedScreenIds.add(0, Workspace.FIRST_SCREEN_ID);
+            orderedScreenIds.add(firstScreenPosition, Workspace.FIRST_SCREEN_ID);
         } else if (!FeatureFlags.QSB_ON_FIRST_SCREEN && orderedScreenIds.isEmpty()) {
             // If there are no screens, we need to have an empty screen
             mWorkspace.addExtraEmptyScreen();
@@ -2119,10 +2124,17 @@
         int count = orderedScreenIds.size();
         for (int i = 0; i < count; i++) {
             int screenId = orderedScreenIds.get(i);
-            if (!FeatureFlags.QSB_ON_FIRST_SCREEN || screenId != Workspace.FIRST_SCREEN_ID) {
+            if (FeatureFlags.QSB_ON_FIRST_SCREEN && screenId == Workspace.FIRST_SCREEN_ID) {
                 // No need to bind the first screen, as its always bound.
-                mWorkspace.insertNewWorkspaceScreenBeforeEmptyScreen(screenId);
+                continue;
             }
+
+            if (screenId == Workspace.LEFT_PANEL_ID) {
+                // No need to bind the left panel, as its always bound.
+                continue;
+            }
+
+            mWorkspace.insertNewWorkspaceScreenBeforeEmptyScreen(screenId);
         }
     }
 
@@ -2197,6 +2209,11 @@
                 continue;
             }
 
+            // Skip if the item is on the left widget panel but the panel is not shown
+            if (item.screenId == Workspace.LEFT_PANEL_ID && !getDeviceProfile().isTwoPanels) {
+                continue;
+            }
+
             final View view;
             switch (item.itemType) {
                 case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION:
@@ -2465,10 +2482,10 @@
         return info;
     }
 
-    public void onPageBoundSynchronously(int page) {
-        mSynchronouslyBoundPage = page;
-        mWorkspace.setCurrentPage(page);
-        mPageToBindSynchronously = PagedView.INVALID_PAGE;
+    public void onPagesBoundSynchronously(IntSet pages) {
+        mSynchronouslyBoundPages = pages;
+        mWorkspace.setCurrentPage(pages.getArray().get(0));
+        mPagesToBindSynchronously = new IntSet();
     }
 
     @Override
@@ -2514,7 +2531,7 @@
      *
      * Implementation of the method from LauncherModel.Callbacks.
      */
-    public void finishBindingItems(int pageBoundFirst) {
+    public void finishBindingItems(IntSet pagesBoundFirst) {
         Object traceToken = TraceHelper.INSTANCE.beginSection("finishBindingItems");
         mWorkspace.restoreInstanceStateForRemainingPages();
 
@@ -2529,11 +2546,13 @@
         ItemInstallQueue.INSTANCE.get(this)
                 .resumeModelPush(FLAG_LOADER_RUNNING);
 
+        int currentPage = pagesBoundFirst != null && !pagesBoundFirst.isEmpty()
+                ? pagesBoundFirst.getArray().get(0) : PagedView.INVALID_PAGE;
         // When undoing the removal of the last item on a page, return to that page.
         // Since we are just resetting the current page without user interaction,
         // override the previous page so we don't log the page switch.
-        mWorkspace.setCurrentPage(pageBoundFirst, pageBoundFirst /* overridePrevPage */);
-        mPageToBindSynchronously = PagedView.INVALID_PAGE;
+        mWorkspace.setCurrentPage(currentPage, currentPage /* overridePrevPage */);
+        mPagesToBindSynchronously = new IntSet();
 
         // Cache one page worth of icons
         getViewCache().setCacheSize(R.layout.folder_application,
@@ -2817,13 +2836,6 @@
         return new float[] {NO_SCALE, NO_OFFSET};
     }
 
-    /**
-     * @see LauncherState#getTaskbarScale(Launcher)
-     */
-    public float getNormalTaskbarScale() {
-        return 1f;
-    }
-
     public static Launcher getLauncher(Context context) {
         return fromContext(context);
     }
diff --git a/src/com/android/launcher3/LauncherPageRestoreHelper.java b/src/com/android/launcher3/LauncherPageRestoreHelper.java
new file mode 100644
index 0000000..e679a12
--- /dev/null
+++ b/src/com/android/launcher3/LauncherPageRestoreHelper.java
@@ -0,0 +1,92 @@
+/**
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3;
+
+import android.os.Bundle;
+import android.util.Log;
+
+import androidx.annotation.VisibleForTesting;
+
+import com.android.launcher3.util.IntSet;
+
+import static androidx.annotation.VisibleForTesting.PACKAGE_PRIVATE;
+
+/**
+ * There's a logic which prioritizes the binding for the current page and defers the other pages'
+ * binding. If two panel home is enabled, we want to bind both pages together.
+ * LauncherPageRestoreHelper's purpose is to contain the logic for persisting, restoring and
+ * calculating which pages to load immediately.
+ */
+public class LauncherPageRestoreHelper {
+
+    public static final String TAG = "LauncherPageRestoreHelper";
+
+    // Type: int
+    private static final String RUNTIME_STATE_CURRENT_SCREEN = "launcher.current_screen";
+    // Type: int
+    private static final String RUNTIME_STATE_CURRENT_SCREEN_COUNT =
+            "launcher.current_screen_count";
+
+    private Workspace mWorkspace;
+
+    public LauncherPageRestoreHelper(Workspace workspace) {
+        this.mWorkspace = workspace;
+    }
+
+    /**
+     * Some configuration changes trigger Launcher to recreate itself, and we want to give more
+     * priority to the currently active pages in the restoration process.
+     */
+    @VisibleForTesting(otherwise = PACKAGE_PRIVATE)
+    public IntSet getPagesToRestore(Bundle savedInstanceState) {
+        IntSet pagesToRestore = new IntSet();
+
+        if (savedInstanceState == null) {
+            return pagesToRestore;
+        }
+
+        int currentPage = savedInstanceState.getInt(RUNTIME_STATE_CURRENT_SCREEN, -1);
+        int totalPageCount = savedInstanceState.getInt(RUNTIME_STATE_CURRENT_SCREEN_COUNT, -1);
+        int panelCount = mWorkspace.getPanelCount();
+
+        if (totalPageCount <= 0 || currentPage < 0) {
+            Log.e(TAG, "getPagesToRestore: Invalid input: " + totalPageCount + ", " + currentPage);
+            return pagesToRestore;
+        }
+
+        int newCurrentPage = mWorkspace.getLeftmostVisiblePageForIndex(currentPage);
+        for (int page = newCurrentPage; page < newCurrentPage + panelCount
+                && page < totalPageCount; page++) {
+            pagesToRestore.add(page);
+        }
+
+        return pagesToRestore;
+    }
+
+    /**
+     * This should be called from Launcher's onSaveInstanceState method to persist everything that
+     * is necessary to calculate later which pages need to be initialized first after a
+     * configuration change.
+     */
+    @VisibleForTesting(otherwise = PACKAGE_PRIVATE)
+    public void savePagesToRestore(Bundle outState) {
+        int pageCount = mWorkspace.getChildCount();
+        if (pageCount > 0) {
+            outState.putInt(RUNTIME_STATE_CURRENT_SCREEN, mWorkspace.getCurrentPage());
+            outState.putInt(RUNTIME_STATE_CURRENT_SCREEN_COUNT, pageCount);
+        }
+    }
+}
diff --git a/src/com/android/launcher3/LauncherState.java b/src/com/android/launcher3/LauncherState.java
index 3399ce9..7985ab5 100644
--- a/src/com/android/launcher3/LauncherState.java
+++ b/src/com/android/launcher3/LauncherState.java
@@ -181,14 +181,6 @@
         return launcher.getNormalOverviewScaleAndOffset();
     }
 
-    public float getTaskbarScale(Launcher launcher) {
-        return launcher.getNormalTaskbarScale();
-    }
-
-    public float getTaskbarTranslationY(Launcher launcher) {
-        return -launcher.getHotseat().getTaskbarOffsetY();
-    }
-
     public float getOverviewFullscreenProgress() {
         return 0;
     }
diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index b423871..204913a 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -16,6 +16,8 @@
 
 package com.android.launcher3;
 
+import static androidx.annotation.VisibleForTesting.PACKAGE_PRIVATE;
+
 import static com.android.launcher3.anim.Interpolators.SCROLL;
 import static com.android.launcher3.compat.AccessibilityManagerCompat.isAccessibilityEnabled;
 import static com.android.launcher3.compat.AccessibilityManagerCompat.isObservedEventType;
@@ -48,6 +50,7 @@
 import android.widget.ScrollView;
 
 import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
 
 import com.android.launcher3.compat.AccessibilityManagerCompat;
 import com.android.launcher3.config.FeatureFlags;
@@ -55,6 +58,7 @@
 import com.android.launcher3.touch.PagedOrientationHandler;
 import com.android.launcher3.touch.PagedOrientationHandler.ChildBounds;
 import com.android.launcher3.util.EdgeEffectCompat;
+import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.Thunk;
 import com.android.launcher3.views.ActivityContext;
 
@@ -291,9 +295,15 @@
         return newPage;
     }
 
-    private int getLeftmostVisiblePageForIndex(int pageIndex) {
+    /**
+     * In most cases where panelCount is 1, this method will just return the page index that was
+     * passed in.
+     * But for example when two panel home is enabled we might need the leftmost visible page index
+     * because that page is the current page.
+     */
+    public int getLeftmostVisiblePageForIndex(int pageIndex) {
         int panelCount = getPanelCount();
-        return (pageIndex / panelCount) * panelCount;
+        return pageIndex - pageIndex % panelCount;
     }
 
     /**
@@ -304,16 +314,34 @@
     }
 
     /**
+     * Returns an IntSet with the indices of the currently visible pages
+     */
+    @VisibleForTesting(otherwise = PACKAGE_PRIVATE)
+    public IntSet getVisiblePageIndices() {
+        IntSet visiblePageIndices = new IntSet();
+        int panelCount = getPanelCount();
+        int pageCount = getPageCount();
+
+        // If a device goes from one panel to two panel (i.e. unfolding a foldable device) while
+        // an odd indexed page is the current page, then the new leftmost visible page will be
+        // different from the old mCurrentPage.
+        int currentPage = getLeftmostVisiblePageForIndex(mCurrentPage);
+        for (int page = currentPage; page < currentPage + panelCount && page < pageCount; page++) {
+            visiblePageIndices.add(page);
+        }
+        return visiblePageIndices;
+    }
+
+    /**
      * Executes the callback against each visible page
      */
     public void forEachVisiblePage(Consumer<View> callback) {
-        int panelCount = getPanelCount();
-        for (int i = mCurrentPage; i < mCurrentPage + panelCount; i++) {
-            View page = getPageAt(i);
+        getVisiblePageIndices().forEach(pageIndex -> {
+            View page = getPageAt(pageIndex);
             if (page != null) {
                 callback.accept(page);
             }
-        }
+        });
     }
 
     /**
@@ -1120,6 +1148,10 @@
         mAllowOverScroll = enable;
     }
 
+    protected float getSignificantMoveThreshold() {
+        return SIGNIFICANT_MOVE_THRESHOLD;
+    }
+
     @Override
     public boolean onTouchEvent(MotionEvent ev) {
         // Skip touch handling if there are no pages to swipe
@@ -1191,6 +1223,7 @@
                     }
                     delta -= consumed;
                 }
+                delta /= mOrientationHandler.getPrimaryScale(this);
 
                 // Only scroll and update mLastMotionX if we have moved some discrete amount.  We
                 // keep the remainder because we are actually testing if we've moved from the last
@@ -1243,11 +1276,12 @@
 
                 int velocity = (int) mOrientationHandler.getPrimaryVelocity(velocityTracker,
                     mActivePointerId);
-                int delta = (int) (primaryDirection - mDownMotionPrimary);
+                float delta = primaryDirection - mDownMotionPrimary;
+                delta /= mOrientationHandler.getPrimaryScale(this);
                 int pageOrientedSize = mOrientationHandler.getMeasuredSize(getPageAt(mCurrentPage));
 
-                boolean isSignificantMove = Math.abs(delta) > pageOrientedSize *
-                    SIGNIFICANT_MOVE_THRESHOLD;
+                boolean isSignificantMove = Math.abs(delta)
+                        > pageOrientedSize * getSignificantMoveThreshold();
 
                 mTotalMotion += Math.abs(mLastMotion + mLastMotionRemainder - primaryDirection);
                 boolean passedSlop = mAllowEasyFling || mTotalMotion > mPageSlop;
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index a2d86bc..2ef9e3e 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -85,6 +85,7 @@
 import com.android.launcher3.shortcuts.ShortcutRequest;
 import com.android.launcher3.util.IntArray;
 import com.android.launcher3.util.PackageManagerHelper;
+import com.android.launcher3.views.ActivityContext;
 import com.android.launcher3.views.BaseDragLayer;
 import com.android.launcher3.widget.PendingAddShortcutInfo;
 
@@ -658,25 +659,26 @@
      * @param outObj this is set to the internal data associated with {@param info},
      *               eg {@link LauncherActivityInfo} or {@link ShortcutInfo}.
      */
-    public static Drawable getFullDrawable(Launcher launcher, ItemInfo info, int width, int height,
+    public static Drawable getFullDrawable(Context context, ItemInfo info, int width, int height,
             Object[] outObj) {
-        Drawable icon = loadFullDrawableWithoutTheme(launcher, info, width, height, outObj);
+        Drawable icon = loadFullDrawableWithoutTheme(context, info, width, height, outObj);
         if (icon instanceof BitmapInfo.Extender) {
-            icon = ((BitmapInfo.Extender) icon).getThemedDrawable(launcher);
+            icon = ((BitmapInfo.Extender) icon).getThemedDrawable(context);
         }
         return icon;
     }
 
-    private static Drawable loadFullDrawableWithoutTheme(Launcher launcher, ItemInfo info,
+    private static Drawable loadFullDrawableWithoutTheme(Context context, ItemInfo info,
             int width, int height, Object[] outObj) {
-        LauncherAppState appState = LauncherAppState.getInstance(launcher);
+        ActivityContext activity = ActivityContext.lookupContext(context);
+        LauncherAppState appState = LauncherAppState.getInstance(context);
         if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION) {
-            LauncherActivityInfo activityInfo = launcher.getSystemService(LauncherApps.class)
+            LauncherActivityInfo activityInfo = context.getSystemService(LauncherApps.class)
                     .resolveActivity(info.getIntent(), info.user);
             outObj[0] = activityInfo;
-            return activityInfo == null ? null : LauncherAppState.getInstance(launcher)
+            return activityInfo == null ? null : LauncherAppState.getInstance(context)
                     .getIconProvider().getIcon(
-                            activityInfo, launcher.getDeviceProfile().inv.fillResIconDpi);
+                            activityInfo, activity.getDeviceProfile().inv.fillResIconDpi);
         } else if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT) {
             if (info instanceof PendingAddShortcutInfo) {
                 ShortcutConfigActivityInfo activityInfo =
@@ -685,18 +687,18 @@
                 return activityInfo.getFullResIcon(appState.getIconCache());
             }
             List<ShortcutInfo> si = ShortcutKey.fromItemInfo(info)
-                    .buildRequest(launcher)
+                    .buildRequest(context)
                     .query(ShortcutRequest.ALL);
             if (si.isEmpty()) {
                 return null;
             } else {
                 outObj[0] = si.get(0);
-                return ShortcutCachingLogic.getIcon(launcher, si.get(0),
+                return ShortcutCachingLogic.getIcon(context, si.get(0),
                         appState.getInvariantDeviceProfile().fillResIconDpi);
             }
         } else if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_FOLDER) {
             FolderAdaptiveIcon icon = FolderAdaptiveIcon.createFolderAdaptiveIcon(
-                    launcher, info.id, new Point(width, height));
+                    activity, info.id, new Point(width, height));
             if (icon == null) {
                 return null;
             }
@@ -714,8 +716,8 @@
      * badge. When dragged from workspace or folder, it may contain app AND/OR work profile badge
      **/
     @TargetApi(Build.VERSION_CODES.O)
-    public static Drawable getBadge(Launcher launcher, ItemInfo info, Object obj) {
-        LauncherAppState appState = LauncherAppState.getInstance(launcher);
+    public static Drawable getBadge(Context context, ItemInfo info, Object obj) {
+        LauncherAppState appState = LauncherAppState.getInstance(context);
         int iconSize = appState.getInvariantDeviceProfile().iconBitmapSize;
         if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT) {
             boolean iconBadged = (info instanceof ItemInfoWithIcon)
@@ -735,7 +737,7 @@
         } else if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_FOLDER) {
             return ((FolderAdaptiveIcon) obj).getBadge();
         } else {
-            return launcher.getPackageManager()
+            return context.getPackageManager()
                     .getUserBadgedIcon(new FixedSizeEmptyDrawable(iconSize), info.user);
         }
     }
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 2e1cc58..aba8a40 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -16,6 +16,8 @@
 
 package com.android.launcher3;
 
+import static androidx.annotation.VisibleForTesting.PROTECTED;
+
 import static com.android.launcher3.LauncherAnimUtils.SPRING_LOADED_EXIT_DELAY;
 import static com.android.launcher3.LauncherSettings.Favorites.ITEM_TYPE_APPLICATION;
 import static com.android.launcher3.LauncherState.ALL_APPS;
@@ -63,6 +65,8 @@
 import android.view.accessibility.AccessibilityNodeInfo;
 import android.widget.Toast;
 
+import androidx.annotation.VisibleForTesting;
+
 import com.android.launcher3.accessibility.AccessibleDragListenerAdapter;
 import com.android.launcher3.accessibility.WorkspaceAccessibilityHelper;
 import com.android.launcher3.anim.Interpolators;
@@ -312,18 +316,34 @@
         // Increase our bottom insets so we don't overlap with the taskbar.
         mInsets.bottom += grid.nonOverlappingTaskbarInset;
 
-        if (isTwoPanelEnabled()) {
+        if (grid.isTwoPanels) {
             setPageSpacing(0); // we have two pages and we don't want any spacing
-        } else if (mWorkspaceFadeInAdjacentScreens) {
-            // In landscape mode the page spacing is set to the default.
-            setPageSpacing(grid.edgeMarginPx);
+
+            // Add left widget panel if it isn't already there
+            if (!mWorkspaceScreens.containsKey(LEFT_PANEL_ID)) {
+                int newCurrentPage = mCurrentPage + 1;
+                bindAndInitLeftPanel();
+                setCurrentPage(newCurrentPage);
+            }
         } else {
-            // In portrait, we want the pages spaced such that there is no
-            // overhang of the previous / next page into the current page viewport.
-            // We assume symmetrical padding in portrait mode.
-            int maxInsets = Math.max(insets.left, insets.right);
-            int maxPadding = Math.max(grid.edgeMarginPx, padding.left + 1);
-            setPageSpacing(Math.max(maxInsets, maxPadding));
+            if (mWorkspaceFadeInAdjacentScreens) {
+                // In landscape mode the page spacing is set to the default.
+                setPageSpacing(grid.edgeMarginPx);
+            } else {
+                // In portrait, we want the pages spaced such that there is no
+                // overhang of the previous / next page into the current page viewport.
+                // We assume symmetrical padding in portrait mode.
+                int maxInsets = Math.max(insets.left, insets.right);
+                int maxPadding = Math.max(grid.edgeMarginPx, padding.left + 1);
+                setPageSpacing(Math.max(maxInsets, maxPadding));
+            }
+
+            // Remove left widget panel if it is present
+            if (mWorkspaceScreens.containsKey(LEFT_PANEL_ID)) {
+                int newCurrentPage = mCurrentPage - 1;
+                removeLeftPanel();
+                setCurrentPage(newCurrentPage);
+            }
         }
 
         int paddingLeftRight = grid.cellLayoutPaddingLeftRightPx;
@@ -462,7 +482,8 @@
     }
 
     @Override
-    protected int getPanelCount() {
+    @VisibleForTesting(otherwise = PROTECTED)
+    public int getPanelCount() {
         return isTwoPanelEnabled() ? 2 : super.getPanelCount();
     }
 
@@ -553,7 +574,7 @@
             return;
         }
         // Add the first page
-        CellLayout firstPage = insertNewWorkspaceScreen(Workspace.FIRST_SCREEN_ID, 0);
+        CellLayout firstPage = insertNewWorkspaceScreen(Workspace.FIRST_SCREEN_ID, getChildCount());
         // Always add a QSB on the first screen.
         if (qsb == null) {
             // In transposed layout, we add the QSB in the Grid. As workspace does not touch the
@@ -572,6 +593,19 @@
         }
     }
 
+    /**
+     * Initializes and binds the left panel
+     */
+    public void bindAndInitLeftPanel() {
+        if (!FeatureFlags.QSB_ON_FIRST_SCREEN || !isTwoPanelEnabled()
+                || mWorkspaceScreens.containsKey(Workspace.LEFT_PANEL_ID)) {
+            return;
+        }
+
+        insertNewWorkspaceScreen(Workspace.LEFT_PANEL_ID, getChildCount());
+        mLauncher.getModelWriter().setLeftPanelShown(true);
+    }
+
     public void removeAllWorkspaceScreens() {
         // Disable all layout transitions before removing all pages to ensure that we don't get the
         // transition animations competing with us changing the scroll when we add pages
@@ -593,6 +627,7 @@
         mLauncher.mHandler.removeCallbacksAndMessages(DeferredWidgetRefresh.class);
 
         // Ensure that the first page is always present
+        bindAndInitLeftPanel();
         bindAndInitFirstWorkspaceScreen(qsb);
 
         // Re-enable the layout transitions
@@ -613,6 +648,18 @@
         insertNewWorkspaceScreen(screenId, getChildCount());
     }
 
+    private void removeLeftPanel() {
+        if (!mWorkspaceScreens.containsKey(LEFT_PANEL_ID)) {
+            return;
+        }
+        mLauncher.getModelWriter().setLeftPanelShown(false);
+        CellLayout leftPanel = mWorkspaceScreens.get(LEFT_PANEL_ID);
+        mWorkspaceScreens.remove(LEFT_PANEL_ID);
+        removeView(leftPanel);
+        mScreenOrder.removeValue(LEFT_PANEL_ID);
+        updatePageScrollValues();
+    }
+
     public CellLayout insertNewWorkspaceScreen(int screenId, int insertIndex) {
         if (mWorkspaceScreens.containsKey(screenId)) {
             throw new RuntimeException("Screen id " + screenId + " already exists!");
diff --git a/src/com/android/launcher3/WorkspaceLayoutManager.java b/src/com/android/launcher3/WorkspaceLayoutManager.java
index d6302ce..326e3c3 100644
--- a/src/com/android/launcher3/WorkspaceLayoutManager.java
+++ b/src/com/android/launcher3/WorkspaceLayoutManager.java
@@ -32,6 +32,8 @@
     int EXTRA_EMPTY_SCREEN_ID = -201;
     // The is the first screen. It is always present, even if its empty.
     int FIRST_SCREEN_ID = 0;
+    // This panel is shown on the first page if the panel count is greater than 1.
+    int LEFT_PANEL_ID = -777;
 
     /**
      * At bind time, we use the rank (screenId) to compute x and y for hotseat items.
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index 0e710b7..5e3177a 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -210,14 +210,14 @@
             + "predictions to be updated while they are visible to the user.");
 
     public static final BooleanFlag ENABLE_TASKBAR = getDebugFlag(
-            "ENABLE_TASKBAR", false, "Allows a system Taskbar to be shown on larger devices.");
+            "ENABLE_TASKBAR", true, "Allows a system Taskbar to be shown on larger devices.");
 
     public static final BooleanFlag ENABLE_OVERVIEW_GRID = getDebugFlag(
-            "ENABLE_OVERVIEW_GRID", false, "Uses grid overview layout. "
+            "ENABLE_OVERVIEW_GRID", true, "Uses grid overview layout. "
             + "Only applicable on large screen devices.");
 
     public static final BooleanFlag ENABLE_TWO_PANEL_HOME = getDebugFlag(
-            "ENABLE_TWO_PANEL_HOME", false,
+            "ENABLE_TWO_PANEL_HOME", true,
             "Uses two panel on home screen. Only applicable on large screen devices.");
 
     public static final BooleanFlag ENABLE_SPLIT_SELECT = getDebugFlag(
@@ -240,6 +240,10 @@
             "ENABLE_WALLPAPER_SCRIM", false,
             "Enables scrim over wallpaper for text protection.");
 
+    public static final BooleanFlag WIDGETS_IN_LAUNCHER_PREVIEW = getDebugFlag(
+            "WIDGETS_IN_LAUNCHER_PREVIEW", false,
+            "Enables widgets in Launcher preview for the Wallpaper app.");
+
     public static void initialize(Context context) {
         synchronized (sDebugFlags) {
             for (DebugFlag flag : sDebugFlags) {
diff --git a/src/com/android/launcher3/dragndrop/DragController.java b/src/com/android/launcher3/dragndrop/DragController.java
index 5731db4..1e0edac 100644
--- a/src/com/android/launcher3/dragndrop/DragController.java
+++ b/src/com/android/launcher3/dragndrop/DragController.java
@@ -74,7 +74,7 @@
     /** Coordinate for last touch event **/
     protected final Point mLastTouch = new Point();
 
-    private final Point mTmpPoint = new Point();
+    protected final Point mTmpPoint = new Point();
 
     protected DropTarget.DragObject mDragObject;
 
@@ -317,7 +317,7 @@
         mDragObject.dragView.animateTo(mMotionDown.x, mMotionDown.y, onCompleteRunnable, duration);
     }
 
-    private void callOnDragEnd() {
+    protected void callOnDragEnd() {
         if (mIsInPreDrag && mOptions.preDragCondition != null) {
             mOptions.preDragCondition.onPreDragEnd(mDragObject, false /* dragStarted*/);
         }
@@ -343,7 +343,7 @@
     /**
      * Clamps the position to the drag layer bounds.
      */
-    private Point getClampedDragLayerPos(float x, float y) {
+    protected Point getClampedDragLayerPos(float x, float y) {
         mActivity.getDragLayer().getLocalVisibleRect(mRectTemp);
         mTmpPoint.x = (int) Math.max(mRectTemp.left, Math.min(x, mRectTemp.right - 1));
         mTmpPoint.y = (int) Math.max(mRectTemp.top, Math.min(y, mRectTemp.bottom - 1));
@@ -390,7 +390,7 @@
             return false;
         }
 
-        Point dragLayerPos = getClampedDragLayerPos(ev.getX(), ev.getY());
+        Point dragLayerPos = getClampedDragLayerPos(getX(ev), getY(ev));
         mLastTouch.set(dragLayerPos.x,  dragLayerPos.y);
         if (ev.getAction() == MotionEvent.ACTION_DOWN) {
             // Remember location of down touch
@@ -403,6 +403,14 @@
         return mDragDriver != null && mDragDriver.onInterceptTouchEvent(ev);
     }
 
+    protected float getX(MotionEvent ev) {
+        return ev.getX();
+    }
+
+    protected float getY(MotionEvent ev) {
+        return ev.getY();
+    }
+
     /**
      * Call this from a drag source view.
      */
diff --git a/src/com/android/launcher3/dragndrop/DragDriver.java b/src/com/android/launcher3/dragndrop/DragDriver.java
index d4ce308..72e47e5 100644
--- a/src/com/android/launcher3/dragndrop/DragDriver.java
+++ b/src/com/android/launcher3/dragndrop/DragDriver.java
@@ -165,8 +165,11 @@
      * Class for driving an internal (i.e. not using framework) drag/drop operation.
      */
     static class InternalDragDriver extends DragDriver {
+        private final DragController mDragController;
+
         InternalDragDriver(DragController dragController, Consumer<MotionEvent> sec) {
             super(dragController, sec);
+            mDragController = dragController;
         }
 
         @Override
@@ -176,11 +179,14 @@
 
             switch (action) {
                 case MotionEvent.ACTION_MOVE:
-                    mEventListener.onDriverDragMove(ev.getX(), ev.getY());
+                    mEventListener.onDriverDragMove(mDragController.getX(ev),
+                            mDragController.getY(ev));
                     break;
                 case MotionEvent.ACTION_UP:
-                    mEventListener.onDriverDragMove(ev.getX(), ev.getY());
-                    mEventListener.onDriverDragEnd(ev.getX(), ev.getY());
+                    mEventListener.onDriverDragMove(mDragController.getX(ev),
+                            mDragController.getY(ev));
+                    mEventListener.onDriverDragEnd(mDragController.getX(ev),
+                            mDragController.getY(ev));
                     break;
                 case MotionEvent.ACTION_CANCEL:
                     mEventListener.onDriverDragCancel();
@@ -197,7 +203,8 @@
 
             switch (action) {
                 case MotionEvent.ACTION_UP:
-                    mEventListener.onDriverDragEnd(ev.getX(), ev.getY());
+                    mEventListener.onDriverDragEnd(mDragController.getX(ev),
+                            mDragController.getY(ev));
                     break;
                 case MotionEvent.ACTION_CANCEL:
                     mEventListener.onDriverDragCancel();
diff --git a/src/com/android/launcher3/dragndrop/DragView.java b/src/com/android/launcher3/dragndrop/DragView.java
index 1664980..fb1a6be 100644
--- a/src/com/android/launcher3/dragndrop/DragView.java
+++ b/src/com/android/launcher3/dragndrop/DragView.java
@@ -53,22 +53,19 @@
 import androidx.dynamicanimation.animation.SpringAnimation;
 import androidx.dynamicanimation.animation.SpringForce;
 
-import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherSettings;
-import com.android.launcher3.LauncherState;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.anim.Interpolators;
 import com.android.launcher3.icons.FastBitmapDrawable;
 import com.android.launcher3.icons.LauncherIcons;
 import com.android.launcher3.model.data.ItemInfo;
-import com.android.launcher3.statemanager.StateManager.StateListener;
 import com.android.launcher3.util.RunnableList;
-import com.android.launcher3.util.Thunk;
+import com.android.launcher3.views.ActivityContext;
 import com.android.launcher3.views.BaseDragLayer;
 
 /** A custom view for rendering an icon, folder, shortcut or widget during drag-n-drop. */
-public class DragView extends FrameLayout implements StateListener<LauncherState> {
+public abstract class DragView<T extends Context & ActivityContext> extends FrameLayout {
 
     public static final int VIEW_ZOOM_DURATION = 150;
 
@@ -81,19 +78,18 @@
     private final int mHeight;
 
     private final int mBlurSizeOutline;
-    private final int mRegistrationX;
-    private final int mRegistrationY;
+    protected final int mRegistrationX;
+    protected final int mRegistrationY;
     private final float mInitialScale;
-    private final float mScaleOnDrop;
-    private final int[] mTempLoc = new int[2];
+    protected final float mScaleOnDrop;
+    protected final int[] mTempLoc = new int[2];
 
     private final RunnableList mOnDragStartCallback = new RunnableList();
 
     private Point mDragVisualizeOffset = null;
     private Rect mDragRegion = null;
-    private final Launcher mLauncher;
-    private final DragLayer mDragLayer;
-    @Thunk final DragController mDragController;
+    protected final T mActivity;
+    private final BaseDragLayer<T> mDragLayer;
     private boolean mHasDrawn = false;
 
     final ValueAnimator mAnim;
@@ -109,7 +105,7 @@
     private Path mScaledMaskPath;
     private Drawable mBadge;
 
-    public DragView(Launcher launcher, Drawable drawable, int registrationX,
+    public DragView(T launcher, Drawable drawable, int registrationX,
             int registrationY, final float initialScale, final float scaleOnDrop,
             final float finalScaleDps) {
         this(launcher, getViewFromDrawable(launcher, drawable),
@@ -122,7 +118,7 @@
      * <p>
      * The registration point is the point inside our view that the touch events should
      * be centered upon.
-     * @param launcher The Launcher instance
+     * @param activity The Launcher instance/ActivityContext this DragView is in.
      * @param content the view content that is attached to the drag view.
      * @param width the width of the dragView
      * @param height the height of the dragView
@@ -132,13 +128,12 @@
      * @param scaleOnDrop the scale used in the drop animation.
      * @param finalScaleDps the scale used in the zoom out animation when the drag view is shown.
      */
-    public DragView(Launcher launcher, View content, int width, int height, int registrationX,
+    public DragView(T activity, View content, int width, int height, int registrationX,
             int registrationY, final float initialScale, final float scaleOnDrop,
             final float finalScaleDps) {
-        super(launcher);
-        mLauncher = launcher;
-        mDragLayer = launcher.getDragLayer();
-        mDragController = launcher.getDragController();
+        super(activity);
+        mActivity = activity;
+        mDragLayer = activity.getDragLayer();
 
         mContent = content;
         mWidth = width;
@@ -187,24 +182,6 @@
         setWillNotDraw(false);
     }
 
-    @Override
-    protected void onAttachedToWindow() {
-        super.onAttachedToWindow();
-        mLauncher.getStateManager().addStateListener(this);
-    }
-
-    @Override
-    protected void onDetachedFromWindow() {
-        super.onDetachedFromWindow();
-        mLauncher.getStateManager().removeStateListener(this);
-    }
-
-    @Override
-    public void onStateTransitionComplete(LauncherState finalState) {
-        setVisibility((finalState == LauncherState.NORMAL
-                || finalState == LauncherState.SPRING_LOADED) ? VISIBLE : INVISIBLE);
-    }
-
     /**
      * Initialize {@code #mIconDrawable} if the item can be represented using
      * an {@link AdaptiveIconDrawable} or {@link FolderAdaptiveIcon}.
@@ -221,10 +198,10 @@
             Object[] outObj = new Object[1];
             int w = mWidth;
             int h = mHeight;
-            Drawable dr = Utilities.getFullDrawable(mLauncher, info, w, h, outObj);
+            Drawable dr = Utilities.getFullDrawable(mActivity, info, w, h, outObj);
 
             if (dr instanceof AdaptiveIconDrawable) {
-                int blurMargin = (int) mLauncher.getResources()
+                int blurMargin = (int) mActivity.getResources()
                         .getDimension(R.dimen.blur_size_medium_outline) / 2;
 
                 Rect bounds = new Rect(0, 0, w, h);
@@ -232,13 +209,13 @@
                 // Badge is applied after icon normalization so the bounds for badge should not
                 // be scaled down due to icon normalization.
                 Rect badgeBounds = new Rect(bounds);
-                mBadge = getBadge(mLauncher, info, outObj[0]);
+                mBadge = getBadge(mActivity, info, outObj[0]);
                 mBadge.setBounds(badgeBounds);
 
                 // Do not draw the background in case of folder as its translucent
                 final boolean shouldDrawBackground = !(dr instanceof FolderAdaptiveIcon);
 
-                try (LauncherIcons li = LauncherIcons.obtain(mLauncher)) {
+                try (LauncherIcons li = LauncherIcons.obtain(mActivity)) {
                     Drawable nDr; // drawable to be normalized
                     if (shouldDrawBackground) {
                         nDr = dr;
@@ -429,12 +406,11 @@
         applyTranslation();
     }
 
-    public void animateTo(int toTouchX, int toTouchY, Runnable onCompleteRunnable, int duration) {
-        mTempLoc[0] = toTouchX - mRegistrationX;
-        mTempLoc[1] = toTouchY - mRegistrationY;
-        mDragLayer.animateViewIntoPosition(this, mTempLoc, 1f, mScaleOnDrop, mScaleOnDrop,
-                DragLayer.ANIMATION_END_DISAPPEAR, onCompleteRunnable, duration);
-    }
+    /**
+     * Animate this DragView to the given DragLayer coordinates and then remove it.
+     */
+    public abstract void animateTo(int toTouchX, int toTouchY, Runnable onCompleteRunnable,
+            int duration);
 
     public void animateShift(final int shiftX, final int shiftY) {
         if (mAnim.isStarted()) {
@@ -470,7 +446,7 @@
             Picture picture = new Picture();
             mContent.draw(picture.beginRecording(mWidth, mHeight));
             picture.endRecording();
-            View view = new View(mLauncher);
+            View view = new View(mActivity);
             view.setClipToOutline(mContent.getClipToOutline());
             view.setOutlineProvider(mContent.getOutlineProvider());
             view.setBackground(new PictureDrawable(picture));
diff --git a/src/com/android/launcher3/dragndrop/FolderAdaptiveIcon.java b/src/com/android/launcher3/dragndrop/FolderAdaptiveIcon.java
index ea1fbdb..6a6603c 100644
--- a/src/com/android/launcher3/dragndrop/FolderAdaptiveIcon.java
+++ b/src/com/android/launcher3/dragndrop/FolderAdaptiveIcon.java
@@ -32,12 +32,12 @@
 
 import androidx.annotation.Nullable;
 
-import com.android.launcher3.Launcher;
 import com.android.launcher3.folder.FolderIcon;
 import com.android.launcher3.folder.PreviewBackground;
 import com.android.launcher3.graphics.ShiftedBitmapDrawable;
 import com.android.launcher3.icons.BitmapRenderer;
 import com.android.launcher3.util.Preconditions;
+import com.android.launcher3.views.ActivityContext;
 
 /**
  * {@link AdaptiveIconDrawable} representation of a {@link FolderIcon}
@@ -70,14 +70,14 @@
     }
 
     public static @Nullable FolderAdaptiveIcon createFolderAdaptiveIcon(
-            Launcher launcher, int folderId, Point dragViewSize) {
+            ActivityContext activity, int folderId, Point dragViewSize) {
         Preconditions.assertNonUiThread();
 
         // Create the actual drawable on the UI thread to avoid race conditions with
         // FolderIcon draw pass
         try {
             return MAIN_EXECUTOR.submit(() -> {
-                FolderIcon icon = launcher.findFolderIcon(folderId);
+                FolderIcon icon = activity.findFolderIcon(folderId);
                 return icon == null ? null : createDrawableOnUiThread(icon, dragViewSize);
 
             }).get();
diff --git a/src/com/android/launcher3/dragndrop/LauncherDragController.java b/src/com/android/launcher3/dragndrop/LauncherDragController.java
index a98d70c..0e8b0a5 100644
--- a/src/com/android/launcher3/dragndrop/LauncherDragController.java
+++ b/src/com/android/launcher3/dragndrop/LauncherDragController.java
@@ -96,7 +96,7 @@
         final float scaleDps = mIsInPreDrag
                 ? res.getDimensionPixelSize(R.dimen.pre_drag_view_scale) : 0f;
         final DragView dragView = mDragObject.dragView = drawable != null
-                ? new DragView(
+                ? new LauncherDragView(
                 mActivity,
                 drawable,
                 registrationX,
@@ -104,7 +104,7 @@
                 initialDragViewScale,
                 dragViewScaleOnDrop,
                 scaleDps)
-                : new DragView(
+                : new LauncherDragView(
                         mActivity,
                         view,
                         view.getMeasuredWidth(),
diff --git a/src/com/android/launcher3/dragndrop/LauncherDragView.java b/src/com/android/launcher3/dragndrop/LauncherDragView.java
new file mode 100644
index 0000000..cc68e2e
--- /dev/null
+++ b/src/com/android/launcher3/dragndrop/LauncherDragView.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.dragndrop;
+
+import android.graphics.drawable.Drawable;
+import android.view.View;
+
+import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherState;
+import com.android.launcher3.statemanager.StateManager;
+
+/**
+ * A DragView drawn/used by the Launcher activity.
+ */
+public class LauncherDragView extends DragView<Launcher>
+        implements StateManager.StateListener<LauncherState> {
+
+
+    public LauncherDragView(Launcher launcher, Drawable drawable, int registrationX,
+            int registrationY, float initialScale, float scaleOnDrop, float finalScaleDps) {
+        super(launcher, drawable, registrationX, registrationY, initialScale, scaleOnDrop,
+                finalScaleDps);
+    }
+
+    public LauncherDragView(Launcher launcher, View content, int width, int height,
+            int registrationX, int registrationY, float initialScale, float scaleOnDrop,
+            float finalScaleDps) {
+        super(launcher, content, width, height, registrationX, registrationY, initialScale,
+                scaleOnDrop, finalScaleDps);
+    }
+
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        mActivity.getStateManager().addStateListener(this);
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        mActivity.getStateManager().removeStateListener(this);
+    }
+
+    @Override
+    public void onStateTransitionComplete(LauncherState finalState) {
+        setVisibility((finalState == LauncherState.NORMAL
+                || finalState == LauncherState.SPRING_LOADED) ? VISIBLE : INVISIBLE);
+    }
+
+    @Override
+    public void animateTo(int toTouchX, int toTouchY, Runnable onCompleteRunnable, int duration) {
+        mTempLoc[0] = toTouchX - mRegistrationX;
+        mTempLoc[1] = toTouchY - mRegistrationY;
+        mActivity.getDragLayer().animateViewIntoPosition(this, mTempLoc, 1f, mScaleOnDrop,
+                mScaleOnDrop, DragLayer.ANIMATION_END_DISAPPEAR, onCompleteRunnable, duration);
+    }
+}
diff --git a/src/com/android/launcher3/graphics/DragPreviewProvider.java b/src/com/android/launcher3/graphics/DragPreviewProvider.java
index a549750..f027b33 100644
--- a/src/com/android/launcher3/graphics/DragPreviewProvider.java
+++ b/src/com/android/launcher3/graphics/DragPreviewProvider.java
@@ -32,13 +32,13 @@
 import androidx.annotation.Nullable;
 
 import com.android.launcher3.BubbleTextView;
-import com.android.launcher3.Launcher;
 import com.android.launcher3.R;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.dragndrop.DraggableView;
 import com.android.launcher3.icons.BitmapRenderer;
 import com.android.launcher3.icons.FastBitmapDrawable;
 import com.android.launcher3.util.SafeCloseable;
+import com.android.launcher3.views.ActivityContext;
 import com.android.launcher3.widget.LauncherAppWidgetHostView;
 
 import java.nio.ByteBuffer;
@@ -150,7 +150,7 @@
     }
 
     public float getScaleAndPosition(Drawable preview, int[] outPos) {
-        float scale = Launcher.getLauncher(mView.getContext())
+        float scale = ActivityContext.lookupContext(mView.getContext())
                 .getDragLayer().getLocationInDragLayer(mView, outPos);
         if (mView instanceof LauncherAppWidgetHostView) {
             // App widgets are technically scaled, but are drawn at their expected size -- so the
@@ -167,7 +167,7 @@
 
     /** Returns the scale and position of a given view for drag-n-drop. */
     public float getScaleAndPosition(View view, int[] outPos) {
-        float scale = Launcher.getLauncher(mView.getContext())
+        float scale = ActivityContext.lookupContext(mView.getContext())
                 .getDragLayer().getLocationInDragLayer(mView, outPos);
         if (mView instanceof LauncherAppWidgetHostView) {
             // App widgets are technically scaled, but are drawn at their expected size -- so the
@@ -201,7 +201,7 @@
         public void run() {
             Bitmap preview = convertPreviewToAlphaBitmap(mPreviewSnapshot);
             if (mIsIcon) {
-                int size = Launcher.getLauncher(mContext).getDeviceProfile().iconSizePx;
+                int size = ActivityContext.lookupContext(mContext).getDeviceProfile().iconSizePx;
                 preview = Bitmap.createScaledBitmap(preview, size, size, false);
             }
             //else case covers AppWidgetHost (doesn't drag/drop across different device profiles)
diff --git a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
index 2a1aec8..952b850 100644
--- a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
+++ b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
@@ -79,6 +79,7 @@
 import com.android.launcher3.uioverrides.plugins.PluginManagerWrapper;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.IntArray;
+import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.MainThreadInitializedObject;
 import com.android.launcher3.views.ActivityContext;
 import com.android.launcher3.views.BaseDragLayer;
@@ -391,11 +392,14 @@
         ArrayList<ItemInfo> otherWorkspaceItems = new ArrayList<>();
         ArrayList<LauncherAppWidgetInfo> currentAppWidgets = new ArrayList<>();
         ArrayList<LauncherAppWidgetInfo> otherAppWidgets = new ArrayList<>();
-        filterCurrentWorkspaceItems(0 /* currentScreenId */,
-                dataModel.workspaceItems, currentWorkspaceItems,
-                otherWorkspaceItems);
-        filterCurrentWorkspaceItems(0 /* currentScreenId */, dataModel.appWidgets,
-                currentAppWidgets, otherAppWidgets);
+
+        IntSet currentScreenIds = IntSet.wrap(0);
+        // TODO(b/185508060): support two panel preview.
+        filterCurrentWorkspaceItems(currentScreenIds, dataModel.workspaceItems,
+                currentWorkspaceItems, otherWorkspaceItems);
+        filterCurrentWorkspaceItems(currentScreenIds, dataModel.appWidgets, currentAppWidgets,
+                otherAppWidgets);
+
         sortWorkspaceItemsSpatially(mIdp, currentWorkspaceItems);
         for (ItemInfo itemInfo : currentWorkspaceItems) {
             switch (itemInfo.itemType) {
diff --git a/src/com/android/launcher3/model/BaseLoaderResults.java b/src/com/android/launcher3/model/BaseLoaderResults.java
index 5c85bab..12ee676 100644
--- a/src/com/android/launcher3/model/BaseLoaderResults.java
+++ b/src/com/android/launcher3/model/BaseLoaderResults.java
@@ -24,13 +24,13 @@
 import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherModel.CallbackTask;
-import com.android.launcher3.PagedView;
 import com.android.launcher3.model.BgDataModel.Callbacks;
 import com.android.launcher3.model.BgDataModel.FixedContainerItems;
 import com.android.launcher3.model.data.AppInfo;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.LauncherAppWidgetInfo;
 import com.android.launcher3.util.IntArray;
+import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.LooperExecutor;
 import com.android.launcher3.util.LooperIdleLock;
 import com.android.launcher3.util.ViewOnDrawExecutor;
@@ -160,20 +160,26 @@
         }
 
         private void bind() {
-            final int currentScreen;
+            IntSet currentScreenIndices;
             {
                 // Create an anonymous scope to calculate currentScreen as it has to be a
                 // final variable.
-                int currScreen = mCallbacks.getPageToBindSynchronously();
-                if (currScreen >= mOrderedScreenIds.size()) {
-                    // There may be no workspace screens (just hotseat items and an empty page).
-                    currScreen = PagedView.INVALID_PAGE;
+                IntSet screenIndices = mCallbacks.getPagesToBindSynchronously();
+                if (screenIndices == null || screenIndices.isEmpty()
+                        || screenIndices.getArray().get(screenIndices.size() - 1)
+                        >= mOrderedScreenIds.size()) {
+                    // There maybe no workspace screens (just hotseat items and an empty page).
+                    // Also we want to prevent IndexOutOfBoundsExceptions.
+                    screenIndices = new IntSet();
                 }
-                currentScreen = currScreen;
+                currentScreenIndices = screenIndices;
             }
-            final boolean validFirstPage = currentScreen >= 0;
-            final int currentScreenId =
-                    validFirstPage ? mOrderedScreenIds.get(currentScreen) : INVALID_SCREEN_ID;
+
+            final boolean validFirstPage = !currentScreenIndices.isEmpty();
+
+            IntSet currentScreenIds  = new IntSet();
+            currentScreenIndices.forEach(
+                    index -> currentScreenIds.add(mOrderedScreenIds.get(index)));
 
             // Separate the items that are on the current screen, and all the other remaining items
             ArrayList<ItemInfo> currentWorkspaceItems = new ArrayList<>();
@@ -181,9 +187,9 @@
             ArrayList<LauncherAppWidgetInfo> currentAppWidgets = new ArrayList<>();
             ArrayList<LauncherAppWidgetInfo> otherAppWidgets = new ArrayList<>();
 
-            filterCurrentWorkspaceItems(currentScreenId, mWorkspaceItems, currentWorkspaceItems,
+            filterCurrentWorkspaceItems(currentScreenIds, mWorkspaceItems, currentWorkspaceItems,
                     otherWorkspaceItems);
-            filterCurrentWorkspaceItems(currentScreenId, mAppWidgets, currentAppWidgets,
+            filterCurrentWorkspaceItems(currentScreenIds, mAppWidgets, currentAppWidgets,
                     otherAppWidgets);
             final InvariantDeviceProfile idp = mApp.getInvariantDeviceProfile();
             sortWorkspaceItemsSpatially(idp, currentWorkspaceItems);
@@ -220,14 +226,14 @@
             bindWorkspaceItems(otherWorkspaceItems, deferredExecutor);
             bindAppWidgets(otherAppWidgets, deferredExecutor);
             // Tell the workspace that we're done binding items
-            executeCallbacksTask(c -> c.finishBindingItems(currentScreen), deferredExecutor);
+            executeCallbacksTask(c -> c.finishBindingItems(currentScreenIndices), deferredExecutor);
 
             if (validFirstPage) {
                 executeCallbacksTask(c -> {
                     // We are loading synchronously, which means, some of the pages will be
                     // bound after first draw. Inform the mCallbacks that page binding is
                     // not complete, and schedule the remaining pages.
-                    c.onPageBoundSynchronously(currentScreen);
+                    c.onPagesBoundSynchronously(currentScreenIndices);
                     c.executeOnNextDraw((ViewOnDrawExecutor) deferredExecutor);
 
                 }, mUiExecutor);
diff --git a/src/com/android/launcher3/model/BgDataModel.java b/src/com/android/launcher3/model/BgDataModel.java
index 1d7d1a2..0740a30 100644
--- a/src/com/android/launcher3/model/BgDataModel.java
+++ b/src/com/android/launcher3/model/BgDataModel.java
@@ -117,6 +117,11 @@
     public int lastBindId = 0;
 
     /**
+     * Value that indicates if left widget panel is shown or not.
+     */
+    public boolean isLeftPanelShown = false;
+
+    /**
      * Clears all the data
      */
     public synchronized void clear() {
@@ -141,6 +146,14 @@
         if (FeatureFlags.QSB_ON_FIRST_SCREEN || screenSet.isEmpty()) {
             screenSet.add(Workspace.FIRST_SCREEN_ID);
         }
+
+        if (isLeftPanelShown) {
+            // We should add it even though there are no items on it.
+            screenSet.add(Workspace.LEFT_PANEL_ID);
+        } else {
+            // We should NOT add it even though there are items on it.
+            screenSet.remove(Workspace.LEFT_PANEL_ID);
+        }
         return screenSet.getArray();
     }
 
@@ -446,15 +459,16 @@
         int FLAG_QUIET_MODE_CHANGE_PERMISSION = 1 << 2;
 
         /**
-         * Returns the page number to bind first, synchronously if possible or -1
+         * Returns an IntSet of page numbers to bind first, synchronously if possible
+         * or an empty IntSet
          */
-        int getPageToBindSynchronously();
+        IntSet getPagesToBindSynchronously();
         void clearPendingBinds();
         void startBinding();
         void bindItems(List<ItemInfo> shortcuts, boolean forceAnimateIcons);
         void bindScreens(IntArray orderedScreenIds);
         void finishFirstPageBind(ViewOnDrawExecutor executor);
-        void finishBindingItems(int pageBoundFirst);
+        void finishBindingItems(IntSet pagesBoundFirst);
         void preAddApps();
         void bindAppsAdded(IntArray newScreens,
                 ArrayList<ItemInfo> addNotAnimated, ArrayList<ItemInfo> addAnimated);
@@ -468,7 +482,7 @@
         void bindRestoreItemsChange(HashSet<ItemInfo> updates);
         void bindWorkspaceComponentsRemoved(ItemInfoMatcher matcher);
         void bindAllWidgets(List<WidgetsListBaseEntry> widgets);
-        void onPageBoundSynchronously(int page);
+        void onPagesBoundSynchronously(IntSet pages);
         void executeOnNextDraw(ViewOnDrawExecutor executor);
         void bindDeepShortcutMap(HashMap<ComponentKey, Integer> deepShortcutMap);
 
diff --git a/src/com/android/launcher3/model/LoaderTask.java b/src/com/android/launcher3/model/LoaderTask.java
index 79396b1..34a21fe 100644
--- a/src/com/android/launcher3/model/LoaderTask.java
+++ b/src/com/android/launcher3/model/LoaderTask.java
@@ -83,6 +83,7 @@
 import com.android.launcher3.shortcuts.ShortcutRequest.QueryResult;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.IOUtils;
+import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.LooperIdleLock;
 import com.android.launcher3.util.PackageManagerHelper;
 import com.android.launcher3.util.PackageUserKey;
@@ -173,8 +174,9 @@
         ArrayList<ItemInfo> allItems = mBgDataModel.getAllWorkspaceItems();
         // Screen set is never empty
         final int firstScreen = mBgDataModel.collectWorkspaceScreens().get(0);
+        // TODO(b/185515153): support two panel home.
 
-        filterCurrentWorkspaceItems(firstScreen, allItems, firstScreenItems,
+        filterCurrentWorkspaceItems(IntSet.wrap(firstScreen), allItems, firstScreenItems,
                 new ArrayList<>() /* otherScreenItems are ignored */);
         mFirstScreenBroadcast.sendBroadcasts(mApp.getContext(), firstScreenItems);
     }
diff --git a/src/com/android/launcher3/model/ModelUtils.java b/src/com/android/launcher3/model/ModelUtils.java
index 9b5fac8..58aa9e5 100644
--- a/src/com/android/launcher3/model/ModelUtils.java
+++ b/src/com/android/launcher3/model/ModelUtils.java
@@ -51,7 +51,8 @@
      * Filters the set of items who are directly or indirectly (via another container) on the
      * specified screen.
      */
-    public static <T extends ItemInfo> void filterCurrentWorkspaceItems(int currentScreenId,
+    public static <T extends ItemInfo> void filterCurrentWorkspaceItems(
+            IntSet currentScreenIds,
             ArrayList<T> allWorkspaceItems,
             ArrayList<T> currentScreenItems,
             ArrayList<T> otherScreenItems) {
@@ -65,7 +66,7 @@
                 (lhs, rhs) -> Integer.compare(lhs.container, rhs.container));
         for (T info : allWorkspaceItems) {
             if (info.container == LauncherSettings.Favorites.CONTAINER_DESKTOP) {
-                if (info.screenId == currentScreenId) {
+                if (currentScreenIds.contains(info.screenId)) {
                     currentScreenItems.add(info);
                     itemsOnScreen.add(info.id);
                 } else {
diff --git a/src/com/android/launcher3/model/ModelWriter.java b/src/com/android/launcher3/model/ModelWriter.java
index 080ce20..2b93118 100644
--- a/src/com/android/launcher3/model/ModelWriter.java
+++ b/src/com/android/launcher3/model/ModelWriter.java
@@ -112,6 +112,13 @@
         }
     }
 
+    /**
+     * Sets the value that indicates if left widget panel is shown or not.
+     */
+    public void setLeftPanelShown(boolean value) {
+        mBgDataModel.isLeftPanelShown = value;
+    }
+
     private void checkItemInfoLocked(int itemId, ItemInfo item, StackTraceElement[] stackTrace) {
         ItemInfo modelItem = mBgDataModel.itemsIdMap.get(itemId);
         if (modelItem != null && item != modelItem) {
diff --git a/src/com/android/launcher3/secondarydisplay/SecondaryDisplayLauncher.java b/src/com/android/launcher3/secondarydisplay/SecondaryDisplayLauncher.java
index 5999091..b271a6a 100644
--- a/src/com/android/launcher3/secondarydisplay/SecondaryDisplayLauncher.java
+++ b/src/com/android/launcher3/secondarydisplay/SecondaryDisplayLauncher.java
@@ -41,6 +41,7 @@
 import com.android.launcher3.popup.PopupDataProvider;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.IntArray;
+import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.util.Themes;
 import com.android.launcher3.util.ViewOnDrawExecutor;
@@ -175,8 +176,8 @@
     }
 
     @Override
-    public int getPageToBindSynchronously() {
-        return 0;
+    public IntSet getPagesToBindSynchronously() {
+        return new IntSet();
     }
 
     @Override
@@ -199,7 +200,7 @@
     }
 
     @Override
-    public void finishBindingItems(int pageBoundFirst) { }
+    public void finishBindingItems(IntSet pagesBoundFirst) { }
 
     @Override
     public void preAddApps() { }
@@ -229,7 +230,7 @@
     public void bindAllWidgets(List<WidgetsListBaseEntry> widgets) { }
 
     @Override
-    public void onPageBoundSynchronously(int page) { }
+    public void onPagesBoundSynchronously(IntSet pages) { }
 
     @Override
     public void executeOnNextDraw(ViewOnDrawExecutor executor) {
diff --git a/src/com/android/launcher3/util/IntArray.java b/src/com/android/launcher3/util/IntArray.java
index 7252f7a..e7235e7 100644
--- a/src/com/android/launcher3/util/IntArray.java
+++ b/src/com/android/launcher3/util/IntArray.java
@@ -17,13 +17,14 @@
 package com.android.launcher3.util;
 
 import java.util.Arrays;
+import java.util.Iterator;
 import java.util.StringTokenizer;
 
 /**
  * Copy of the platform hidden implementation of android.util.IntArray.
  * Implements a growing array of int primitives.
  */
-public class IntArray implements Cloneable {
+public class IntArray implements Cloneable, Iterable<Integer> {
     private static final int MIN_CAPACITY_INCREMENT = 12;
 
     private static final int[] EMPTY_INT = new int[0];
@@ -272,4 +273,30 @@
             throw new ArrayIndexOutOfBoundsException("length=" + len + "; index=" + index);
         }
     }
+
+    @Override
+    public Iterator<Integer> iterator() {
+        return new ValueIterator();
+    }
+
+    @Thunk
+    class ValueIterator implements Iterator<Integer> {
+
+        private int mNextIndex = 0;
+
+        @Override
+        public boolean hasNext() {
+            return mNextIndex < size();
+        }
+
+        @Override
+        public Integer next() {
+            return get(mNextIndex++);
+        }
+
+        @Override
+        public void remove() {
+            throw new UnsupportedOperationException();
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/com/android/launcher3/util/IntSet.java b/src/com/android/launcher3/util/IntSet.java
index 851f129..0f4df62 100644
--- a/src/com/android/launcher3/util/IntSet.java
+++ b/src/com/android/launcher3/util/IntSet.java
@@ -16,11 +16,13 @@
 package com.android.launcher3.util;
 
 import java.util.Arrays;
+import java.util.Iterator;
 
 /**
  * A wrapper over IntArray implementing a growing set of int primitives.
+ * The elements in the array are sorted in ascending order.
  */
-public class IntSet {
+public class IntSet implements Iterable<Integer> {
 
     final IntArray mArray = new IntArray();
 
@@ -34,6 +36,16 @@
         }
     }
 
+    /**
+     * Removes the specified value from the set if it exist.
+     */
+    public void remove(int value) {
+        int index = Arrays.binarySearch(mArray.mValues, 0, mArray.mSize, value);
+        if (index >= 0) {
+            mArray.removeIndex(index);
+        }
+    }
+
     public boolean contains(int value) {
         return Arrays.binarySearch(mArray.mValues, 0, mArray.mSize, value) >= 0;
     }
@@ -61,6 +73,9 @@
         return (obj instanceof IntSet) && ((IntSet) obj).mArray.equals(mArray);
     }
 
+    /**
+     * Returns the wrapped IntArray. The elements in the array are sorted in ascending order.
+     */
     public IntArray getArray() {
         return mArray;
     }
@@ -78,4 +93,21 @@
         Arrays.sort(set.mArray.mValues, 0, set.mArray.mSize);
         return set;
     }
+
+    /**
+     * Returns an IntSet with the given values.
+     */
+    public static IntSet wrap(int... array) {
+        return wrap(IntArray.wrap(array));
+    }
+
+    @Override
+    public Iterator<Integer> iterator() {
+        return mArray.iterator();
+    }
+
+    @Override
+    public String toString() {
+        return "IntSet{" + mArray.toConcatString() + '}';
+    }
 }
diff --git a/src/com/android/launcher3/views/ActivityContext.java b/src/com/android/launcher3/views/ActivityContext.java
index 646b669..b95904e 100644
--- a/src/com/android/launcher3/views/ActivityContext.java
+++ b/src/com/android/launcher3/views/ActivityContext.java
@@ -21,9 +21,12 @@
 import android.view.LayoutInflater;
 import android.view.View.AccessibilityDelegate;
 
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.dot.DotInfo;
 import com.android.launcher3.dragndrop.DragController;
+import com.android.launcher3.folder.FolderIcon;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.util.ViewCache;
 
@@ -100,6 +103,13 @@
     }
 
     /**
+     * Returns the FolderIcon with the given item id, if it exists.
+     */
+    default @Nullable FolderIcon findFolderIcon(final int folderIconId) {
+        return null;
+    }
+
+    /**
      * Returns the ActivityContext associated with the given Context.
      */
     static <T extends Context & ActivityContext> T lookupContext(Context context) {
diff --git a/src_ui_overrides/com/android/launcher3/uioverrides/ApiWrapper.java b/src_ui_overrides/com/android/launcher3/uioverrides/ApiWrapper.java
index 4407fe1..c606861 100644
--- a/src_ui_overrides/com/android/launcher3/uioverrides/ApiWrapper.java
+++ b/src_ui_overrides/com/android/launcher3/uioverrides/ApiWrapper.java
@@ -17,6 +17,7 @@
 package com.android.launcher3.uioverrides;
 
 import android.app.Person;
+import android.content.Context;
 import android.content.pm.ShortcutInfo;
 import android.view.Display;
 
@@ -36,4 +37,11 @@
     public static boolean isInternalDisplay(Display display) {
         return display.getDisplayId() == Display.DEFAULT_DISPLAY;
     }
+
+    /**
+     * Returns the minimum space that should be left empty at the start of hotseat
+     */
+    public static int getHotseatStartOffset(Context context) {
+        return 0;
+    }
 }