Introduce a new Home animation for workspace and the outgoing task.

The values are currently the same for all display and orientation
configurations, but they might change before launch.

There are a couple known imperfections:
* Swiping out of a hotseat app with very low velocity doesn't look
  great
* Sometimes, if the window movement reaches its final location faster
  than the background is done scaling, there is a small snap in icon
  position

Bug: 298089923
Flag: ACONFIG com.android.launcher3.enable_scaling_reveal_home_animation DISABLED
Test: verified with the flag on and off

Change-Id: Id54c7f0a76f62108d8b92a3b5e78634fff64dbef
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 4b4bdc2..9afbc64 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -18,6 +18,7 @@
 
 import static com.android.app.animation.Interpolators.LINEAR;
 import static com.android.launcher3.Flags.enableOverviewIconMenu;
+import static com.android.launcher3.Flags.enableScalingRevealHomeAnimation;
 import static com.android.launcher3.InvariantDeviceProfile.INDEX_DEFAULT;
 import static com.android.launcher3.InvariantDeviceProfile.INDEX_LANDSCAPE;
 import static com.android.launcher3.InvariantDeviceProfile.INDEX_TWO_PANEL_LANDSCAPE;
@@ -436,7 +437,11 @@
             if (isMultiDisplay && !ENABLE_MULTI_DISPLAY_PARTIAL_DEPTH.get()) {
                 // TODO(b/259893832): Revert to use maxWallpaperScale to calculate bottomSheetDepth
                 // when screen recorder bug is fixed.
-                bottomSheetDepth = 1f;
+                if (enableScalingRevealHomeAnimation()) {
+                    bottomSheetDepth = 0.3f;
+                } else {
+                    bottomSheetDepth = 1f;
+                }
             } else {
                 // The goal is to set wallpaper to zoom at workspaceContentScale when in AllApps.
                 // When depth is 0, wallpaper zoom is set to maxWallpaperScale.
diff --git a/src/com/android/launcher3/states/EditModeState.kt b/src/com/android/launcher3/states/EditModeState.kt
index aafaaa0..6ff47ae 100644
--- a/src/com/android/launcher3/states/EditModeState.kt
+++ b/src/com/android/launcher3/states/EditModeState.kt
@@ -16,6 +16,7 @@
 package com.android.launcher3.states
 
 import android.content.Context
+import com.android.launcher3.Flags.enableScalingRevealHomeAnimation
 import com.android.launcher3.Launcher
 import com.android.launcher3.LauncherState
 import com.android.launcher3.logging.StatsLogManager
@@ -25,6 +26,8 @@
 class EditModeState(id: Int) : LauncherState(id, StatsLogManager.LAUNCHER_STATE_HOME, STATE_FLAGS) {
 
     companion object {
+        const val DEPTH_15_PERCENT = 0.15f
+
         private val STATE_FLAGS =
             (FLAG_MULTI_PAGE or
                 FLAG_WORKSPACE_INACCESSIBLE or
@@ -40,7 +43,11 @@
     }
 
     override fun <T> getDepthUnchecked(context: T): Float where T : Context?, T : ActivityContext? {
-        return 0.5f
+        if (enableScalingRevealHomeAnimation()) {
+            return DEPTH_15_PERCENT
+        } else {
+            return 0.5f
+        }
     }
 
     override fun getWorkspaceScaleAndTranslation(launcher: Launcher): ScaleAndTranslation {
diff --git a/src/com/android/launcher3/states/HintState.java b/src/com/android/launcher3/states/HintState.java
index 4cfced8..bf2fb30 100644
--- a/src/com/android/launcher3/states/HintState.java
+++ b/src/com/android/launcher3/states/HintState.java
@@ -15,6 +15,7 @@
  */
 package com.android.launcher3.states;
 
+import static com.android.launcher3.Flags.enableScalingRevealHomeAnimation;
 import static com.android.launcher3.logging.StatsLogManager.LAUNCHER_STATE_HOME;
 
 import android.content.Context;
@@ -34,6 +35,8 @@
     private static final int STATE_FLAGS = FLAG_WORKSPACE_INACCESSIBLE | FLAG_DISABLE_RESTORE
             | FLAG_HAS_SYS_UI_SCRIM;
 
+    public static final float DEPTH_5_PERCENT = 0.05f;
+
     public HintState(int id) {
         this(id, LAUNCHER_STATE_HOME);
     }
@@ -49,7 +52,11 @@
 
     @Override
     protected float getDepthUnchecked(Context context) {
-        return 0.15f;
+        if (enableScalingRevealHomeAnimation()) {
+            return DEPTH_5_PERCENT;
+        } else {
+            return 0.15f;
+        }
     }
 
     @Override
diff --git a/src/com/android/launcher3/states/SpringLoadedState.java b/src/com/android/launcher3/states/SpringLoadedState.java
index 3286afb..2e57ed8 100644
--- a/src/com/android/launcher3/states/SpringLoadedState.java
+++ b/src/com/android/launcher3/states/SpringLoadedState.java
@@ -15,6 +15,7 @@
  */
 package com.android.launcher3.states;
 
+import static com.android.launcher3.Flags.enableScalingRevealHomeAnimation;
 import static com.android.launcher3.logging.StatsLogManager.LAUNCHER_STATE_HOME;
 
 import android.content.Context;
@@ -33,6 +34,8 @@
             | FLAG_WORKSPACE_INACCESSIBLE | FLAG_DISABLE_RESTORE
             | FLAG_WORKSPACE_ICONS_CAN_BE_DRAGGED | FLAG_WORKSPACE_HAS_BACKGROUNDS;
 
+    public static final float DEPTH_15_PERCENT = 0.15f;
+
     public SpringLoadedState(int id) {
         super(id, LAUNCHER_STATE_HOME, STATE_FLAGS);
     }
@@ -62,7 +65,11 @@
 
     @Override
     protected float getDepthUnchecked(Context context) {
-        return 0.5f;
+        if (enableScalingRevealHomeAnimation()) {
+            return DEPTH_15_PERCENT;
+        } else {
+            return 0.5f;
+        }
     }
 
     @Override