Merge "Fix issue with side pages being visible momentarily when swiping up" into ub-launcher3-master
diff --git a/quickstep/src/com/android/launcher3/uioverrides/BackgroundAppState.java b/quickstep/src/com/android/launcher3/uioverrides/BackgroundAppState.java
index 53dcc74..fdb13b1 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/BackgroundAppState.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/BackgroundAppState.java
@@ -15,10 +15,14 @@
  */
 package com.android.launcher3.uioverrides;
 
+import android.os.RemoteException;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.allapps.AllAppsTransitionController;
 import com.android.quickstep.QuickScrubController;
+import com.android.quickstep.RecentsModel;
 import com.android.quickstep.util.LayoutUtils;
+import com.android.quickstep.views.RecentsView;
+import com.android.systemui.shared.recents.ISystemUiProxy;
 
 /**
  * State indicating that the Launcher is behind an app
@@ -43,4 +47,27 @@
         float progressDelta = (transitionLength / scrollRange);
         return super.getVerticalProgress(launcher) + progressDelta;
     }
+
+    @Override
+    public float[] getOverviewScaleAndTranslationYFactor(Launcher launcher) {
+        // Initialize the recents view scale to what it would be when starting swipe up/quickscrub
+        RecentsView recentsView = launcher.getOverviewPanel();
+        recentsView.getTaskSize(sTempRect);
+        int appWidth = launcher.getDragLayer().getWidth();
+        if (recentsView.shouldUseMultiWindowTaskSizeStrategy()) {
+            ISystemUiProxy sysUiProxy = RecentsModel.INSTANCE.get(launcher).getSystemUiProxy();
+            if (sysUiProxy != null) {
+                try {
+                    // Try to use the actual non-minimized app width (launcher will be resized to
+                    // the non-minimized bounds, which differs from the app width in landscape
+                    // multi-window mode
+                    appWidth = sysUiProxy.getNonMinimizedSplitScreenSecondaryBounds().width();
+                } catch (RemoteException e) {
+                    // Ignore, fall back to just using the drag layer width
+                }
+            }
+        }
+        float scale = (float) appWidth / sTempRect.width();
+        return new float[] { scale, 0f };
+    }
 }
diff --git a/quickstep/src/com/android/quickstep/ActivityControlHelper.java b/quickstep/src/com/android/quickstep/ActivityControlHelper.java
index 206c8be..2331a4e 100644
--- a/quickstep/src/com/android/quickstep/ActivityControlHelper.java
+++ b/quickstep/src/com/android/quickstep/ActivityControlHelper.java
@@ -286,7 +286,7 @@
             }
 
             if (interactionType == INTERACTION_NORMAL) {
-                playScaleDownAnim(anim, activity);
+                playScaleDownAnim(anim, activity, endState);
             }
 
             anim.setDuration(transitionLength * 2);
@@ -304,14 +304,24 @@
         /**
          * Scale down recents from the center task being full screen to being in overview.
          */
-        private void playScaleDownAnim(AnimatorSet anim, Launcher launcher) {
+        private void playScaleDownAnim(AnimatorSet anim, Launcher launcher,
+                LauncherState endState) {
             RecentsView recentsView = launcher.getOverviewPanel();
             TaskView v = recentsView.getTaskViewAt(recentsView.getCurrentPage());
             if (v == null) {
                 return;
             }
+
+            // Setup the clip animation helper source/target rects in the final transformed state
+            // of the recents view (a scale may be applied prior to this animation starting to
+            // line up the side pages during swipe up)
+            float prevRvScale = recentsView.getScaleX();
+            float targetRvScale = endState.getOverviewScaleAndTranslationYFactor(launcher)[0];
+            SCALE_PROPERTY.set(recentsView, targetRvScale);
             ClipAnimationHelper clipHelper = new ClipAnimationHelper();
             clipHelper.fromTaskThumbnailView(v.getThumbnail(), (RecentsView) v.getParent(), null);
+            SCALE_PROPERTY.set(recentsView, prevRvScale);
+
             if (!clipHelper.getSourceRect().isEmpty() && !clipHelper.getTargetRect().isEmpty()) {
                 float fromScale = clipHelper.getSourceRect().width()
                         / clipHelper.getTargetRect().width();
diff --git a/quickstep/src/com/android/quickstep/util/ClipAnimationHelper.java b/quickstep/src/com/android/quickstep/util/ClipAnimationHelper.java
index 711ef58..8c84f29 100644
--- a/quickstep/src/com/android/quickstep/util/ClipAnimationHelper.java
+++ b/quickstep/src/com/android/quickstep/util/ClipAnimationHelper.java
@@ -90,8 +90,6 @@
 
     // Whether to boost the opening animation target layers, or the closing
     private int mBoostModeTargetLayers = -1;
-    // Wether or not applyTransform has been called yet since prepareAnimation()
-    private boolean mIsFirstFrame = true;
 
     private BiFunction<RemoteAnimationTargetCompat, Float, Float> mTaskAlphaCallback =
             (t, a1) -> a1;