[automerge] Revert "Revert "Sync hotseat/taskbar handoff"" 2p: 27f9559203

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17606862

Bug: 223789074
Bug: 223443781
Bug: 202507555
Change-Id: If72bec9d681a0fdb873a77cf8d5e67fc5be56801

Android.bp

@@ -31,6 +31,7 @@ android_library {
         "androidx.test.uiautomator_uiautomator",
         "androidx.preference_preference",
         "SystemUISharedLib",
+        "SystemUIAnimationLib",
     ],
     srcs: [
         "tests/tapl/**/*.java",
@@ -196,6 +197,7 @@ android_library {
         "lottie",
         "SystemUISharedLib",
         "SystemUI-statsd",
+        "SystemUIAnimationLib",
     ],
     manifest: "quickstep/AndroidManifest.xml",
     min_sdk_version: "current",
@@ -304,6 +306,7 @@ android_library {
         "SystemUISharedLib",
         "Launcher3CommonDepsLib",
         "QuickstepResLib",
+        "SystemUIAnimationLib",
     ],
     manifest: "quickstep/AndroidManifest.xml",
     platform_apis: true,

quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java

@@ -29,13 +29,16 @@ import androidx.annotation.NonNull;
 
 import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.BaseQuickstepLauncher;
+import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.LauncherState;
+import com.android.launcher3.Utilities;
 import com.android.launcher3.statemanager.StateManager;
 import com.android.launcher3.util.MultiValueAlpha;
 import com.android.quickstep.AnimatedFloat;
 import com.android.quickstep.RecentsAnimationCallbacks;
 import com.android.quickstep.RecentsAnimationController;
 import com.android.quickstep.views.RecentsView;
+import com.android.systemui.animation.ViewRootSync;
 import com.android.systemui.shared.recents.model.ThumbnailData;
 
 import java.util.HashMap;
@@ -76,6 +79,9 @@ import java.util.function.Supplier;
 
     private boolean mShouldDelayLauncherStateAnim;
 
+    // We skip any view synchronizations during init/destroy.
+    private boolean mCanSyncViews;
+
     private final StateManager.StateListener<LauncherState> mStateListener =
             new StateManager.StateListener<LauncherState>() {
 
@@ -102,6 +108,8 @@ import java.util.function.Supplier;
             };
 
     public void init(TaskbarControllers controllers, BaseQuickstepLauncher launcher) {
+        mCanSyncViews = false;
+
         mControllers = controllers;
         mLauncher = launcher;
 
@@ -121,9 +129,13 @@ import java.util.function.Supplier;
         updateStateForFlag(FLAG_RESUMED, launcher.hasBeenResumed());
         mLauncherState = launcher.getStateManager().getState();
         applyState(0);
+
+        mCanSyncViews = true;
     }
 
     public void onDestroy() {
+        mCanSyncViews = false;
+
         mIconAlignmentForResumedState.finishAnimation();
         mIconAlignmentForGestureState.finishAnimation();
         mIconAlignmentForLauncherState.finishAnimation();
@@ -131,6 +143,8 @@ import java.util.function.Supplier;
         mIconAlphaForHome.setConsumer(null);
         mLauncher.getHotseat().setIconsAlpha(1f);
         mLauncher.getStateManager().removeStateListener(mStateListener);
+
+        mCanSyncViews = true;
     }
 
     public Animator createAnimToLauncher(@NonNull LauncherState toState,
@@ -380,6 +394,27 @@ import java.util.function.Supplier;
             return;
         }
         float alignment = alignmentSupplier.get();
+        float currentValue = mIconAlphaForHome.getValue();
+        boolean taskbarWillBeVisible = alignment < 1;
+        boolean firstFrameVisChanged = (taskbarWillBeVisible && Float.compare(currentValue, 1) != 0)
+                || (!taskbarWillBeVisible && Float.compare(currentValue, 0) != 0);
+
+        // Sync the first frame where we swap taskbar and hotseat.
+        if (firstFrameVisChanged && mCanSyncViews && !Utilities.IS_RUNNING_IN_TEST_HARNESS) {
+            DeviceProfile dp = mLauncher.getDeviceProfile();
+
+            // Do all the heavy work before the sync.
+            mControllers.taskbarViewController.createIconAlignmentControllerIfNotExists(dp);
+
+            ViewRootSync.synchronizeNextDraw(mLauncher.getHotseat(),
+                    mControllers.taskbarActivityContext.getDragLayer(),
+                    () -> updateIconAlignment(alignment));
+        } else {
+            updateIconAlignment(alignment);
+        }
+    }
+
+    private void updateIconAlignment(float alignment) {
         mControllers.taskbarViewController.setLauncherIconAlignment(
                 alignment, mLauncher.getDeviceProfile());
 

quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java

@@ -199,6 +199,16 @@ public class TaskbarViewController implements TaskbarControllers.LoggableTaskbar
                 ));
     }
 
+    /**
+     * Creates the icon alignment controller if it does not already exist.
+     * @param launcherDp Launcher device profile.
+     */
+    public void createIconAlignmentControllerIfNotExists(DeviceProfile launcherDp) {
+        if (mIconAlignControllerLazy == null) {
+            mIconAlignControllerLazy = createIconAlignmentController(launcherDp);
+        }
+    }
+
     /**
      * Sets the taskbar icon alignment relative to Launcher hotseat icons
      * @param alignmentRatio [0, 1]
@@ -206,9 +216,7 @@ public class TaskbarViewController implements TaskbarControllers.LoggableTaskbar
      *                       1 => fully aligned
      */
     public void setLauncherIconAlignment(float alignmentRatio, DeviceProfile launcherDp) {
-        if (mIconAlignControllerLazy == null) {
+        createIconAlignmentControllerIfNotExists(launcherDp);
-            mIconAlignControllerLazy = createIconAlignmentController(launcherDp);
-        }
         mIconAlignControllerLazy.setPlayFraction(alignmentRatio);
         if (alignmentRatio <= 0 || alignmentRatio >= 1) {
             // Cleanup lazy controller so that it is created again in next animation