Play return to icon animation if user swipes back to All Apps.

Bug: 205187702
Test: open app in all apps, swipe back to go back to all apps
Change-Id: I9e79c8365fdf667321343aaac2f8d77cb60a316a
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 8154168..d60cd31 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -29,6 +29,7 @@
 import static com.android.launcher3.AbstractFloatingView.TYPE_SNACKBAR;
 import static com.android.launcher3.AbstractFloatingView.getTopOpenViewWithType;
 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;
 import static com.android.launcher3.LauncherState.FLAG_CLOSE_POPUPS;
 import static com.android.launcher3.LauncherState.FLAG_MULTI_PAGE;
@@ -39,6 +40,7 @@
 import static com.android.launcher3.LauncherState.SPRING_LOADED;
 import static com.android.launcher3.Utilities.postAsyncCallback;
 import static com.android.launcher3.accessibility.LauncherAccessibilityDelegate.getSupportedActions;
+import static com.android.launcher3.config.FeatureFlags.ADAPTIVE_ICON_WINDOW_ANIM;
 import static com.android.launcher3.dragndrop.DragLayer.ALPHA_INDEX_LAUNCHER_LOAD;
 import static com.android.launcher3.logging.StatsLogManager.LAUNCHER_STATE_BACKGROUND;
 import static com.android.launcher3.logging.StatsLogManager.LAUNCHER_STATE_HOME;
@@ -55,6 +57,7 @@
 import static com.android.launcher3.popup.SystemShortcut.WIDGETS;
 import static com.android.launcher3.states.RotationHelper.REQUEST_LOCK;
 import static com.android.launcher3.states.RotationHelper.REQUEST_NONE;
+import static com.android.launcher3.util.ItemInfoMatcher.forFolderMatch;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
@@ -90,6 +93,7 @@
 import android.os.StrictMode;
 import android.os.SystemClock;
 import android.os.Trace;
+import android.os.UserHandle;
 import android.text.TextUtils;
 import android.text.method.TextKeyListener;
 import android.util.Log;
@@ -215,6 +219,7 @@
 import java.io.PrintWriter;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
@@ -2674,6 +2679,79 @@
         }
     }
 
+    /**
+     * Similar to {@link #getFirstMatch} but optimized to finding a suitable view for the app close
+     * animation.
+     *
+     * @param preferredItemId The id of the preferred item to match to if it exists.
+     * @param packageName The package name of the app to match.
+     * @param user The user of the app to match.
+     */
+    public View getFirstMatchForAppClose(int preferredItemId, String packageName, UserHandle user) {
+        final ItemInfoMatcher preferredItem = (info, cn) ->
+                info != null && info.id == preferredItemId;
+        final ItemInfoMatcher packageAndUserAndApp = (info, cn) ->
+                info != null
+                        && info.itemType == ITEM_TYPE_APPLICATION
+                        && info.user.equals(user)
+                        && info.getTargetComponent() != null
+                        && TextUtils.equals(info.getTargetComponent().getPackageName(),
+                        packageName);
+
+        if (isInState(LauncherState.ALL_APPS)) {
+            return getFirstMatch(Collections.singletonList(mAppsView.getActiveRecyclerView()),
+                    preferredItem, packageAndUserAndApp);
+        } else {
+            List<ViewGroup> containers = new ArrayList<>(mWorkspace.getPanelCount() + 1);
+            containers.add(mWorkspace.getHotseat().getShortcutsAndWidgets());
+            mWorkspace.forEachVisiblePage(page
+                    -> containers.add(((CellLayout) page).getShortcutsAndWidgets()));
+
+            // Order: Preferred item by itself or in folder, then by matching package/user
+            if (ADAPTIVE_ICON_WINDOW_ANIM.get()) {
+                return getFirstMatch(containers, preferredItem, forFolderMatch(preferredItem),
+                        packageAndUserAndApp, forFolderMatch(packageAndUserAndApp));
+            } else {
+                // Do not use Folder as a criteria, since it'll cause a crash when trying to draw
+                // FolderAdaptiveIcon as the background.
+                return getFirstMatch(containers, preferredItem, packageAndUserAndApp);
+            }
+        }
+    }
+
+    /**
+     * Finds the first view matching the ordered operators across the given viewgroups in order.
+     * @param containers List of ViewGroups to scan, in order of preference.
+     * @param operators List of operators, in order starting from best matching operator.
+     */
+    private static View getFirstMatch(Iterable<ViewGroup> containers,
+            final ItemInfoMatcher... operators) {
+        for (ItemInfoMatcher operator : operators) {
+            for (ViewGroup container : containers) {
+                View match = mapOverViewGroup(container, operator);
+                if (match != null) {
+                    return match;
+                }
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Returns the first view matching the operator in the given ViewGroups, or null if none.
+     * Forward iteration matters.
+     */
+    private static View mapOverViewGroup(ViewGroup container, ItemInfoMatcher op) {
+        final int itemCount = container.getChildCount();
+        for (int itemIdx = 0; itemIdx < itemCount; itemIdx++) {
+            View item = container.getChildAt(itemIdx);
+            if (op.matchesInfo((ItemInfo) item.getTag())) {
+                return item;
+            }
+        }
+        return null;
+    }
+
     private ValueAnimator createNewAppBounceAnimation(View v, int i) {
         ValueAnimator bounceAnim = new PropertyListBuilder().alpha(1).scale(1).build(v)
                 .setDuration(ItemInstallQueue.NEW_SHORTCUT_BOUNCE_DURATION);
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 131fbfb..fbaf71b 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -26,7 +26,6 @@
 import static com.android.launcher3.LauncherState.NORMAL;
 import static com.android.launcher3.LauncherState.SPRING_LOADED;
 import static com.android.launcher3.anim.AnimatorListeners.forSuccessCallback;
-import static com.android.launcher3.config.FeatureFlags.ADAPTIVE_ICON_WINDOW_ANIM;
 import static com.android.launcher3.dragndrop.DragLayer.ALPHA_INDEX_OVERLAY;
 import static com.android.launcher3.logging.StatsLogManager.LAUNCHER_STATE_HOME;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_SWIPELEFT;
@@ -51,7 +50,6 @@
 import android.os.Message;
 import android.os.Parcelable;
 import android.os.UserHandle;
-import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.util.SparseArray;
@@ -3148,62 +3146,6 @@
         return layouts;
     }
 
-    /**
-     * Similar to {@link #getFirstMatch} but optimized to finding a suitable view for the app close
-     * animation.
-     *
-     * @param preferredItemId The id of the preferred item to match to if it exists.
-     * @param packageName The package name of the app to match.
-     * @param user The user of the app to match.
-     */
-    public View getFirstMatchForAppClose(int preferredItemId, String packageName, UserHandle user) {
-        final ItemOperator preferredItem = (ItemInfo info, View view) ->
-                info != null && info.id == preferredItemId;
-        final ItemOperator preferredItemInFolder = (info, view) -> {
-            if (info instanceof FolderInfo) {
-                FolderInfo folderInfo = (FolderInfo) info;
-                for (WorkspaceItemInfo shortcutInfo : folderInfo.contents) {
-                    if (preferredItem.evaluate(shortcutInfo, view)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        };
-        final ItemOperator packageAndUserAndApp = (ItemInfo info, View view) ->
-                info != null
-                        && info.itemType == ITEM_TYPE_APPLICATION
-                        && info.user.equals(user)
-                        && info.getTargetComponent() != null
-                        && TextUtils.equals(info.getTargetComponent().getPackageName(),
-                                packageName);
-        final ItemOperator packageAndUserAndAppInFolder = (info, view) -> {
-            if (info instanceof FolderInfo) {
-                FolderInfo folderInfo = (FolderInfo) info;
-                for (WorkspaceItemInfo shortcutInfo : folderInfo.contents) {
-                    if (packageAndUserAndApp.evaluate(shortcutInfo, view)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        };
-
-        List<CellLayout> cellLayouts = new ArrayList<>(getPanelCount() + 1);
-        cellLayouts.add(getHotseat());
-        forEachVisiblePage(page -> cellLayouts.add((CellLayout) page));
-
-        // Order: Preferred item, App icons in hotseat/workspace, app in folder in hotseat/workspace
-        if (ADAPTIVE_ICON_WINDOW_ANIM.get()) {
-            return getFirstMatch(cellLayouts, preferredItem, preferredItemInFolder,
-                    packageAndUserAndApp, packageAndUserAndAppInFolder);
-        } else {
-            // Do not use Folder as a criteria, since it'll cause a crash when trying to draw
-            // FolderAdaptiveIcon as the background.
-            return getFirstMatch(cellLayouts, preferredItem, packageAndUserAndApp);
-        }
-    }
-
     public View getHomescreenIconByItemId(final int id) {
         return getFirstMatch((info, v) -> info != null && info.id == id);
     }
@@ -3229,23 +3171,6 @@
         return value[0];
     }
 
-    /**
-     * Finds the first view matching the ordered operators across the given cell layouts by order.
-     * @param cellLayouts List of CellLayouts to scan, in order of preference.
-     * @param operators List of operators, in order starting from best matching operator.
-     */
-    View getFirstMatch(Iterable<CellLayout> cellLayouts, final ItemOperator... operators) {
-        for (ItemOperator operator : operators) {
-            for (CellLayout cellLayout : cellLayouts) {
-                View match = mapOverCellLayout(cellLayout, operator);
-                if (match != null) {
-                    return match;
-                }
-            }
-        }
-        return null;
-    }
-
     void clearDropTargets() {
         mapOverItems(new ItemOperator() {
             @Override
diff --git a/src/com/android/launcher3/util/ItemInfoMatcher.java b/src/com/android/launcher3/util/ItemInfoMatcher.java
index ab3083d..7917410 100644
--- a/src/com/android/launcher3/util/ItemInfoMatcher.java
+++ b/src/com/android/launcher3/util/ItemInfoMatcher.java
@@ -20,6 +20,7 @@
 import android.os.UserHandle;
 
 import com.android.launcher3.LauncherSettings.Favorites;
+import com.android.launcher3.model.data.FolderInfo;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.shortcuts.ShortcutKey;
 
@@ -85,8 +86,16 @@
     }
 
     static ItemInfoMatcher ofShortcutKeys(Set<ShortcutKey> keys) {
-        return  (info, cn) -> info.itemType == Favorites.ITEM_TYPE_DEEP_SHORTCUT &&
-                        keys.contains(ShortcutKey.fromItemInfo(info));
+        return (info, cn) -> info.itemType == Favorites.ITEM_TYPE_DEEP_SHORTCUT
+                && keys.contains(ShortcutKey.fromItemInfo(info));
+    }
+
+    /**
+     * Returns a matcher for items within folders.
+     */
+    static ItemInfoMatcher forFolderMatch(ItemInfoMatcher childOperator) {
+        return (info, cn) -> info instanceof FolderInfo && ((FolderInfo) info).contents.stream()
+                .anyMatch(childOperator::matchesInfo);
     }
 
     /**
diff --git a/src/com/android/launcher3/views/FloatingSurfaceView.java b/src/com/android/launcher3/views/FloatingSurfaceView.java
index e2e3be7..f32f904 100644
--- a/src/com/android/launcher3/views/FloatingSurfaceView.java
+++ b/src/com/android/launcher3/views/FloatingSurfaceView.java
@@ -158,7 +158,7 @@
         if (mContract == null) {
             return;
         }
-        View icon = mLauncher.getWorkspace().getFirstMatchForAppClose(-1,
+        View icon = mLauncher.getFirstMatchForAppClose(-1,
                 mContract.componentName.getPackageName(), mContract.user);
 
         boolean iconChanged = mIcon != icon;
@@ -182,7 +182,7 @@
                 lp.topMargin = Math.round(mIconPosition.top);
             }
         }
-        if (iconChanged && !mIconBounds.isEmpty()) {
+        if (mIcon != null && iconChanged && !mIconBounds.isEmpty()) {
             // Record the icon display
             setCurrentIconVisible(true);
             Canvas c = mPicture.beginRecording(mIconBounds.width(), mIconBounds.height());