Updating fallback activity

> Wallpaper based theme support
> Light/dark system UI
> Swipe gestures to start and dismiss a task
> Fixing insets and task preview size

Bug: 75979063
Change-Id: Id402e6ac50551a7c0849742e3a0e77df3ead5aa2
diff --git a/quickstep/AndroidManifest.xml b/quickstep/AndroidManifest.xml
index 8b28597..f62d1d6 100644
--- a/quickstep/AndroidManifest.xml
+++ b/quickstep/AndroidManifest.xml
@@ -48,7 +48,16 @@
         It is set to true so that the activity can be started from command line -->
         <activity android:name="com.android.quickstep.RecentsActivity"
             android:exported="true"
-            android:excludeFromRecents="true" />
+            android:excludeFromRecents="true"
+            android:launchMode="singleTask"
+            android:clearTaskOnLaunch="true"
+            android:stateNotNeeded="true"
+            android:theme="@style/LauncherTheme"
+            android:screenOrientation="unspecified"
+            android:configChanges="keyboard|keyboardHidden|navigation|orientation|screenSize|screenLayout|smallestScreenSize"
+            android:resizeableActivity="true"
+            android:resumeWhilePausing="true"
+            android:taskAffinity="" />
 
         <!-- Content provider to settings search -->
         <provider
diff --git a/quickstep/res/layout/fallback_recents_activity.xml b/quickstep/res/layout/fallback_recents_activity.xml
index b3fc4ed..22f8b55 100644
--- a/quickstep/res/layout/fallback_recents_activity.xml
+++ b/quickstep/res/layout/fallback_recents_activity.xml
@@ -13,13 +13,14 @@
      See the License for the specific language governing permissions and
      limitations under the License.
 -->
-<com.android.quickstep.RecentsRootView
+<com.android.quickstep.fallback.RecentsRootView
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/drag_layer"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:fitsSystemWindows="true">
 
-    <com.android.quickstep.FallbackRecentsView
+    <com.android.quickstep.fallback.FallbackRecentsView
         xmlns:android="http://schemas.android.com/apk/res/android"
         android:id="@+id/overview_panel"
         android:layout_width="match_parent"
@@ -28,4 +29,4 @@
         android:clipToPadding="false"
         android:theme="@style/HomeScreenElementTheme" />
 
-</com.android.quickstep.RecentsRootView>
\ No newline at end of file
+</com.android.quickstep.fallback.RecentsRootView>
\ No newline at end of file
diff --git a/quickstep/src/com/android/launcher3/uioverrides/TaskViewTouchController.java b/quickstep/src/com/android/launcher3/uioverrides/TaskViewTouchController.java
index 369ae3a..7b2487a 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/TaskViewTouchController.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/TaskViewTouchController.java
@@ -15,7 +15,6 @@
  */
 package com.android.launcher3.uioverrides;
 
-import static com.android.launcher3.LauncherState.OVERVIEW;
 import static com.android.launcher3.anim.Interpolators.scrollInterpolatorForVelocity;
 
 import android.animation.Animator;
@@ -26,15 +25,15 @@
 import android.view.View;
 
 import com.android.launcher3.AbstractFloatingView;
-import com.android.launcher3.Launcher;
+import com.android.launcher3.BaseDraggingActivity;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.anim.AnimatorPlaybackController;
 import com.android.launcher3.anim.Interpolators;
-import com.android.launcher3.dragndrop.DragLayer;
 import com.android.launcher3.touch.SwipeDetector;
 import com.android.launcher3.userevent.nano.LauncherLogProto.Action.Direction;
 import com.android.launcher3.userevent.nano.LauncherLogProto.Action.Touch;
 import com.android.launcher3.util.TouchController;
+import com.android.launcher3.views.BaseDragLayer;
 import com.android.quickstep.PendingAnimation;
 import com.android.quickstep.views.RecentsView;
 import com.android.quickstep.views.TaskView;
@@ -42,8 +41,8 @@
 /**
  * Touch controller for handling task view card swipes
  */
-public class TaskViewTouchController extends AnimatorListenerAdapter
-        implements TouchController, SwipeDetector.Listener {
+public abstract class TaskViewTouchController<T extends BaseDraggingActivity>
+        extends AnimatorListenerAdapter implements TouchController, SwipeDetector.Listener {
 
     private static final String TAG = "OverviewSwipeController";
 
@@ -53,7 +52,7 @@
     // Progress after which the transition is assumed to be a success in case user does not fling
     private static final float SUCCESS_TRANSITION_PROGRESS = 0.5f;
 
-    private final Launcher mLauncher;
+    protected final T mActivity;
     private final SwipeDetector mDetector;
     private final RecentsView mRecentsView;
     private final int[] mTempCords = new int[2];
@@ -70,10 +69,10 @@
 
     private TaskView mTaskBeingDragged;
 
-    public TaskViewTouchController(Launcher launcher) {
-        mLauncher = launcher;
-        mRecentsView = launcher.getOverviewPanel();
-        mDetector = new SwipeDetector(launcher, this, SwipeDetector.VERTICAL);
+    public TaskViewTouchController(T activity) {
+        mActivity = activity;
+        mRecentsView = activity.getOverviewPanel();
+        mDetector = new SwipeDetector(activity, this, SwipeDetector.VERTICAL);
     }
 
     private boolean canInterceptTouch() {
@@ -81,12 +80,14 @@
             // If we are already animating from a previous state, we can intercept.
             return true;
         }
-        if (AbstractFloatingView.getTopOpenView(mLauncher) != null) {
+        if (AbstractFloatingView.getTopOpenView(mActivity) != null) {
             return false;
         }
-        return mLauncher.isInState(OVERVIEW);
+        return isRecentsInteractive();
     }
 
+    protected abstract boolean isRecentsInteractive();
+
     @Override
     public void onAnimationCancel(Animator animation) {
         if (mCurrentAnimation != null && animation == mCurrentAnimation.getTarget()) {
@@ -115,7 +116,7 @@
                 mTaskBeingDragged = null;
 
                 View view = mRecentsView.getChildAt(mRecentsView.getCurrentPage());
-                if (view instanceof TaskView && mLauncher.getDragLayer().isEventOverView(view, ev)) {
+                if (view instanceof TaskView && mActivity.getDragLayer().isEventOverView(view, ev)) {
                     // The tile can be dragged down to open the task.
                     mTaskBeingDragged = (TaskView) view;
                     directionsToDetectScroll = SwipeDetector.DIRECTION_BOTH;
@@ -156,9 +157,8 @@
         }
 
         mCurrentAnimationIsGoingUp = goingUp;
-        float range = mLauncher.getAllAppsController().getShiftRange();
-        long maxDuration = (long) (2 * range);
-        DragLayer dl = mLauncher.getDragLayer();
+        BaseDragLayer dl = mActivity.getDragLayer();
+        long maxDuration = (long) (2 * dl.getHeight());
 
         if (goingUp) {
             mPendingAnimation = mRecentsView.createTaskDismissAnimation(mTaskBeingDragged,
@@ -254,7 +254,7 @@
         }
         if (wasSuccess) {
             if (!mCurrentAnimationIsGoingUp) {
-                mLauncher.getUserEventDispatcher().logTaskLaunch(logAction,
+                mActivity.getUserEventDispatcher().logTaskLaunch(logAction,
                         Direction.DOWN, mTaskBeingDragged.getTask().getTopComponent());
             }
         }
diff --git a/quickstep/src/com/android/launcher3/uioverrides/UiFactory.java b/quickstep/src/com/android/launcher3/uioverrides/UiFactory.java
index e6d06da..3cae371 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/UiFactory.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/UiFactory.java
@@ -16,6 +16,7 @@
 
 package com.android.launcher3.uioverrides;
 
+import static com.android.launcher3.LauncherState.OVERVIEW;
 import static com.android.launcher3.Utilities.getPrefs;
 import static com.android.quickstep.OverviewInteractionState.KEY_SWIPE_UP_ENABLED;
 import static com.android.launcher3.LauncherState.ALL_APPS;
@@ -41,19 +42,19 @@
             return new TouchController[] {
                     launcher.getDragController(),
                     new LandscapeStatesTouchController(launcher),
-                    new TaskViewTouchController(launcher)};
+                    new LauncherTaskViewcontroller(launcher)};
         }
         if (launcher.getDeviceProfile().isVerticalBarLayout()) {
             return new TouchController[] {
                     launcher.getDragController(),
                     new LandscapeStatesTouchController(launcher),
                     new LandscapeEdgeSwipeController(launcher),
-                    new TaskViewTouchController(launcher)};
+                    new LauncherTaskViewcontroller(launcher)};
         } else {
             return new TouchController[] {
                     launcher.getDragController(),
                     new PortraitStatesTouchController(launcher),
-                    new TaskViewTouchController(launcher)};
+                    new LauncherTaskViewcontroller(launcher)};
         }
     }
 
@@ -101,4 +102,16 @@
             model.onTrimMemory(level);
         }
     }
+
+    private static class LauncherTaskViewcontroller extends TaskViewTouchController<Launcher> {
+
+        public LauncherTaskViewcontroller(Launcher activity) {
+            super(activity);
+        }
+
+        @Override
+        protected boolean isRecentsInteractive() {
+            return mActivity.isInState(OVERVIEW);
+        }
+    }
 }
diff --git a/quickstep/src/com/android/quickstep/ActivityControlHelper.java b/quickstep/src/com/android/quickstep/ActivityControlHelper.java
index 9e2e5ac..4e3528c 100644
--- a/quickstep/src/com/android/quickstep/ActivityControlHelper.java
+++ b/quickstep/src/com/android/quickstep/ActivityControlHelper.java
@@ -41,6 +41,7 @@
 import com.android.launcher3.allapps.AllAppsTransitionController;
 import com.android.launcher3.anim.AnimatorPlaybackController;
 import com.android.launcher3.util.ViewOnDrawExecutor;
+import com.android.quickstep.fallback.FallbackRecentsView;
 import com.android.quickstep.views.LauncherLayoutListener;
 import com.android.quickstep.views.RecentsView;
 import com.android.quickstep.views.TaskView;
diff --git a/quickstep/src/com/android/quickstep/FallbackActivityOptions.java b/quickstep/src/com/android/quickstep/FallbackActivityOptions.java
index 3a7fb2d..04352c3 100644
--- a/quickstep/src/com/android/quickstep/FallbackActivityOptions.java
+++ b/quickstep/src/com/android/quickstep/FallbackActivityOptions.java
@@ -16,13 +16,13 @@
 package com.android.quickstep;
 
 import android.graphics.Rect;
-import android.util.Log;
 
 import com.android.systemui.shared.recents.model.ThumbnailData;
 import com.android.systemui.shared.system.RecentsAnimationControllerCompat;
 import com.android.systemui.shared.system.RecentsAnimationListener;
 import com.android.systemui.shared.system.RemoteAnimationRunnerCompat;
 import com.android.systemui.shared.system.RemoteAnimationTargetCompat;
+import com.android.systemui.shared.system.TransactionCompat;
 import com.android.systemui.shared.system.WindowManagerWrapper;
 
 /**
@@ -39,6 +39,7 @@
     @Override
     public void onAnimationStart(RemoteAnimationTargetCompat[] targetCompats,
             Runnable runnable) {
+        showOpeningTarget(targetCompats);
         DummyRecentsAnimationControllerCompat dummyRecentsAnim =
                 new DummyRecentsAnimationControllerCompat(runnable);
 
@@ -52,6 +53,18 @@
         mListener.onAnimationCanceled();
     }
 
+    private void showOpeningTarget(RemoteAnimationTargetCompat[] targetCompats) {
+        for (RemoteAnimationTargetCompat target : targetCompats) {
+            TransactionCompat t = new TransactionCompat();
+            int layer = target.mode == RemoteAnimationTargetCompat.MODE_CLOSING
+                    ? Integer.MAX_VALUE
+                    : target.prefixOrderIndex;
+            t.setLayer(target.leash, layer);
+            t.show(target.leash);
+            t.apply();
+        }
+    }
+
     private static class DummyRecentsAnimationControllerCompat
             extends RecentsAnimationControllerCompat {
 
diff --git a/quickstep/src/com/android/quickstep/RecentsActivity.java b/quickstep/src/com/android/quickstep/RecentsActivity.java
index e579205..cf60fdf 100644
--- a/quickstep/src/com/android/quickstep/RecentsActivity.java
+++ b/quickstep/src/com/android/quickstep/RecentsActivity.java
@@ -26,7 +26,11 @@
 import com.android.launcher3.R;
 import com.android.launcher3.badge.BadgeInfo;
 import com.android.launcher3.uioverrides.UiFactory;
+import com.android.launcher3.util.SystemUiController;
+import com.android.launcher3.util.Themes;
 import com.android.launcher3.views.BaseDragLayer;
+import com.android.quickstep.fallback.FallbackRecentsView;
+import com.android.quickstep.fallback.RecentsRootView;
 
 /**
  * A simple activity to show the recently launched tasks
@@ -51,6 +55,10 @@
         mRecentsRootView = findViewById(R.id.drag_layer);
         mFallbackRecentsView = findViewById(R.id.overview_panel);
 
+        mRecentsRootView.setup();
+
+        getSystemUiController().updateUiState(SystemUiController.UI_STATE_BASE_WINDOW,
+                Themes.getAttrBoolean(this, R.attr.isWorkspaceDarkText));
         RecentsActivityTracker.onRecentsActivityCreate(this);
     }
 
diff --git a/quickstep/src/com/android/quickstep/FallbackRecentsView.java b/quickstep/src/com/android/quickstep/fallback/FallbackRecentsView.java
similarity index 88%
rename from quickstep/src/com/android/quickstep/FallbackRecentsView.java
rename to quickstep/src/com/android/quickstep/fallback/FallbackRecentsView.java
index 251e958..7d7f88f 100644
--- a/quickstep/src/com/android/quickstep/FallbackRecentsView.java
+++ b/quickstep/src/com/android/quickstep/fallback/FallbackRecentsView.java
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.android.quickstep;
+package com.android.quickstep.fallback;
 
 import android.content.Context;
 import android.graphics.Canvas;
@@ -23,6 +23,7 @@
 
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Insettable;
+import com.android.quickstep.RecentsActivity;
 import com.android.quickstep.views.RecentsView;
 
 public class FallbackRecentsView extends RecentsView<RecentsActivity> implements Insettable {
@@ -73,12 +74,7 @@
     public static void getCenterPageRect(DeviceProfile grid, Context context, Rect outRect) {
         Rect targetPadding = getPadding(grid, context);
         verticalCenter(targetPadding, grid);
-        Rect insets = grid.getInsets();
-        outRect.set(
-                targetPadding.left + insets.left,
-                targetPadding.top + insets.top,
-                grid.widthPx - targetPadding.right - insets.right,
-                grid.heightPx - targetPadding.bottom - insets.bottom);
+        getPageRect(grid, context, outRect, targetPadding);
     }
 
     @Override
diff --git a/quickstep/src/com/android/quickstep/RecentsRootView.java b/quickstep/src/com/android/quickstep/fallback/RecentsRootView.java
similarity index 78%
rename from quickstep/src/com/android/quickstep/RecentsRootView.java
rename to quickstep/src/com/android/quickstep/fallback/RecentsRootView.java
index 24785f9..7aaa88c 100644
--- a/quickstep/src/com/android/quickstep/RecentsRootView.java
+++ b/quickstep/src/com/android/quickstep/fallback/RecentsRootView.java
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.android.quickstep;
+package com.android.quickstep.fallback;
 
 import android.annotation.TargetApi;
 import android.content.Context;
@@ -25,15 +25,22 @@
 import com.android.launcher3.util.Themes;
 import com.android.launcher3.util.TouchController;
 import com.android.launcher3.views.BaseDragLayer;
+import com.android.quickstep.RecentsActivity;
 
 public class RecentsRootView extends BaseDragLayer<RecentsActivity> {
 
-    private final BaseActivity mActivity;
+    private final RecentsActivity mActivity;
 
     public RecentsRootView(Context context, AttributeSet attrs) {
         super(context, attrs);
-        mActivity = BaseActivity.fromContext(context);
-        mControllers = new TouchController[0];
+        mActivity = (RecentsActivity) BaseActivity.fromContext(context);
+        setSystemUiVisibility(SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+                | SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
+                | SYSTEM_UI_FLAG_LAYOUT_STABLE);
+    }
+
+    public void setup() {
+        mControllers = new TouchController[] { new RecentsTaskController(mActivity) };
     }
 
     @TargetApi(23)
diff --git a/quickstep/src/com/android/quickstep/fallback/RecentsTaskController.java b/quickstep/src/com/android/quickstep/fallback/RecentsTaskController.java
new file mode 100644
index 0000000..9463cc9
--- /dev/null
+++ b/quickstep/src/com/android/quickstep/fallback/RecentsTaskController.java
@@ -0,0 +1,31 @@
+/*
+ * 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.
+ */
+package com.android.quickstep.fallback;
+
+import com.android.launcher3.uioverrides.TaskViewTouchController;
+import com.android.quickstep.RecentsActivity;
+
+public class RecentsTaskController extends TaskViewTouchController<RecentsActivity> {
+
+    public RecentsTaskController(RecentsActivity activity) {
+        super(activity);
+    }
+
+    @Override
+    protected boolean isRecentsInteractive() {
+        return mActivity.hasWindowFocus();
+    }
+}
diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index bac8fc7..1c4e511 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -405,7 +405,7 @@
         getPageRect(grid, context, outRect, targetPadding);
     }
 
-    private static void getPageRect(DeviceProfile grid, Context context, Rect outRect,
+    protected static void getPageRect(DeviceProfile grid, Context context, Rect outRect,
             Rect targetPadding) {
         Rect insets = grid.getInsets();
         outRect.set(