Merge "Add recent tasks to Taskbar" into sc-dev

quickstep/res/layout/taskbar_divider.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2021 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.
+-->
+
+<View
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="@dimen/taskbar_divider_thickness"
+    android:layout_height="@dimen/taskbar_divider_height"
+    android:layout_marginStart="@dimen/taskbar_icon_spacing"
+    android:layout_marginEnd="@dimen/taskbar_icon_spacing"
+    android:background="@color/taskbar_divider" />

quickstep/res/values/colors.xml

@@ -27,4 +27,5 @@
 
     <!-- Taskbar -->
     <color name="taskbar_background">#101010</color>
+    <color name="taskbar_divider">#C0C0C0</color>
 </resources>

quickstep/res/values/dimens.xml

@@ -127,4 +127,6 @@
     <dimen name="taskbar_icon_drag_icon_size">54dp</dimen>
     <!-- Note that this applies to both sides of all icons, so visible space is double this. -->
     <dimen name="taskbar_icon_spacing">14dp</dimen>
+    <dimen name="taskbar_divider_thickness">1dp</dimen>
+    <dimen name="taskbar_divider_height">24dp</dimen>
 </resources>

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

@@ -23,6 +23,8 @@ import static com.android.systemui.shared.system.WindowManagerWrapper.ITYPE_BOTT
 import static com.android.systemui.shared.system.WindowManagerWrapper.ITYPE_EXTRA_NAVIGATION_BAR;
 
 import android.animation.Animator;
+import android.app.ActivityOptions;
+import android.content.ComponentName;
 import android.graphics.PixelFormat;
 import android.graphics.Point;
 import android.view.Gravity;
@@ -42,8 +44,13 @@ import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.states.StateAnimationConfig;
 import com.android.launcher3.touch.ItemClickHandler;
 import com.android.quickstep.AnimatedFloat;
+import com.android.systemui.shared.recents.model.Task;
+import com.android.systemui.shared.system.ActivityManagerWrapper;
 import com.android.systemui.shared.system.WindowManagerWrapper;
 
+import java.util.ArrayList;
+import java.util.List;
+
 /**
  * Interfaces with Launcher/WindowManager/SystemUI to determine what to show in TaskbarView.
  */
@@ -60,11 +67,17 @@ public class TaskbarController {
     private final TaskbarStateHandler mTaskbarStateHandler;
     private final TaskbarVisibilityController mTaskbarVisibilityController;
     private final TaskbarHotseatController mHotseatController;
+    private final TaskbarRecentsController mRecentsController;
     private final TaskbarDragController mDragController;
 
     // Initialized in init().
     private WindowManager.LayoutParams mWindowLayoutParams;
 
+    // Contains all loaded Tasks, not yet deduped from Hotseat items.
+    private List<Task> mLatestLoadedRecentTasks;
+    // Contains all loaded Hotseat items.
+    private ItemInfo[] mLatestLoadedHotseatItems;
+
     public TaskbarController(BaseQuickstepLauncher launcher,
             TaskbarContainerView taskbarContainerView) {
         mLauncher = launcher;
@@ -79,6 +92,8 @@ public class TaskbarController {
                 createTaskbarVisibilityControllerCallbacks());
         mHotseatController = new TaskbarHotseatController(mLauncher,
                 createTaskbarHotseatControllerCallbacks());
+        mRecentsController = new TaskbarRecentsController(mLauncher,
+                createTaskbarRecentsControllerCallbacks());
         mDragController = new TaskbarDragController(mLauncher);
     }
 
@@ -101,7 +116,16 @@ public class TaskbarController {
         return new TaskbarViewCallbacks() {
             @Override
             public View.OnClickListener getItemOnClickListener() {
-                return ItemClickHandler.INSTANCE;
+                return view -> {
+                    Object tag = view.getTag();
+                    if (tag instanceof Task) {
+                        Task task = (Task) tag;
+                        ActivityManagerWrapper.getInstance().startActivityFromRecents(task.key,
+                                ActivityOptions.makeBasic());
+                    } else {
+                        ItemClickHandler.INSTANCE.onClick(view);
+                    }
+                };
             }
 
             @Override
@@ -116,6 +140,23 @@ public class TaskbarController {
             @Override
             public void updateHotseatItems(ItemInfo[] hotseatItemInfos) {
                 mTaskbarView.updateHotseatItems(hotseatItemInfos);
+                mLatestLoadedHotseatItems = hotseatItemInfos;
+                dedupeAndUpdateRecentItems();
+            }
+        };
+    }
+
+    private TaskbarRecentsControllerCallbacks createTaskbarRecentsControllerCallbacks() {
+        return new TaskbarRecentsControllerCallbacks() {
+            @Override
+            public void updateRecentItems(ArrayList<Task> recentTasks) {
+                mLatestLoadedRecentTasks = recentTasks;
+                dedupeAndUpdateRecentItems();
+            }
+
+            @Override
+            public void updateRecentTaskAtIndex(int taskIndex, Task task) {
+                mTaskbarView.updateRecentTaskAtIndex(taskIndex, task);
             }
         };
     }
@@ -124,11 +165,13 @@ public class TaskbarController {
      * Initializes the Taskbar, including adding it to the screen.
      */
     public void init() {
-        mTaskbarView.init(mHotseatController.getNumHotseatIcons());
+        mTaskbarView.init(mHotseatController.getNumHotseatIcons(),
+                mRecentsController.getNumRecentIcons());
         addToWindowManager();
         mTaskbarStateHandler.setTaskbarCallbacks(createTaskbarStateHandlerCallbacks());
         mTaskbarVisibilityController.init();
         mHotseatController.init();
+        mRecentsController.init();
     }
 
     private TaskbarStateHandlerCallbacks createTaskbarStateHandlerCallbacks() {
@@ -149,6 +192,7 @@ public class TaskbarController {
         mTaskbarStateHandler.setTaskbarCallbacks(null);
         mTaskbarVisibilityController.cleanup();
         mHotseatController.cleanup();
+        mRecentsController.cleanup();
     }
 
     private void removeFromWindowManager() {
@@ -246,6 +290,52 @@ public class TaskbarController {
         return mTaskbarView.isDraggingItem();
     }
 
+    private void dedupeAndUpdateRecentItems() {
+        if (mLatestLoadedRecentTasks == null || mLatestLoadedHotseatItems == null) {
+            return;
+        }
+
+        final int numRecentIcons = mRecentsController.getNumRecentIcons();
+
+        // From most recent to least recently opened.
+        List<Task> dedupedTasksInDescendingOrder = new ArrayList<>();
+        for (int i = mLatestLoadedRecentTasks.size() - 1; i >= 0; i--) {
+            Task task = mLatestLoadedRecentTasks.get(i);
+            boolean isTaskInHotseat = false;
+            for (ItemInfo hotseatItem : mLatestLoadedHotseatItems) {
+                if (hotseatItem == null) {
+                    continue;
+                }
+                ComponentName hotseatActivity = hotseatItem.getTargetComponent();
+                if (hotseatActivity != null && task.key.sourceComponent.getPackageName()
+                        .equals(hotseatActivity.getPackageName())) {
+                    isTaskInHotseat = true;
+                    break;
+                }
+            }
+            if (!isTaskInHotseat) {
+                dedupedTasksInDescendingOrder.add(task);
+                if (dedupedTasksInDescendingOrder.size() == numRecentIcons) {
+                    break;
+                }
+            }
+        }
+
+        // TaskbarView expects an array of all the recent tasks to show, in the order to show them.
+        // So we create an array of the proper size, then fill it in such that the most recent items
+        // are at the end. If there aren't enough elements to fill the array, leave them null.
+        Task[] tasksArray = new Task[numRecentIcons];
+        for (int i = 0; i < tasksArray.length; i++) {
+            Task task = i >= dedupedTasksInDescendingOrder.size()
+                    ? null
+                    : dedupedTasksInDescendingOrder.get(i);
+            tasksArray[tasksArray.length - 1 - i] = task;
+        }
+
+        mTaskbarView.updateRecentTasks(tasksArray);
+        mRecentsController.loadIconsForTasks(tasksArray);
+    }
+
     /**
      * @return Whether the given View is in the same window as Taskbar.
      */
@@ -283,4 +373,12 @@ public class TaskbarController {
     protected interface TaskbarHotseatControllerCallbacks {
         void updateHotseatItems(ItemInfo[] hotseatItemInfos);
     }
+
+    /**
+     * Contains methods that TaskbarRecentsController can call to interface with TaskbarController.
+     */
+    protected interface TaskbarRecentsControllerCallbacks {
+        void updateRecentItems(ArrayList<Task> recentTasks);
+        void updateRecentTaskAtIndex(int taskIndex, Task task);
+    }
 }

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

@@ -25,6 +25,7 @@ import android.content.pm.LauncherApps;
 import android.content.res.Resources;
 import android.graphics.Canvas;
 import android.graphics.Point;
+import android.os.UserHandle;
 import android.view.DragEvent;
 import android.view.View;
 
@@ -33,6 +34,7 @@ import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.R;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
+import com.android.systemui.shared.recents.model.Task;
 import com.android.systemui.shared.system.ClipDescriptionCompat;
 import com.android.systemui.shared.system.LauncherAppsCompat;
 
@@ -102,6 +104,15 @@ public class TaskbarDragController {
                                 item.getIntent().getComponent(), null, item.user));
             }
             intent.putExtra(Intent.EXTRA_USER, item.user);
+        } else if (tag instanceof Task) {
+            Task task = (Task) tag;
+            clipDescription = new ClipDescription(task.titleDescription,
+                    new String[] {
+                            ClipDescriptionCompat.MIMETYPE_APPLICATION_TASK
+                    });
+            intent = new Intent();
+            intent.putExtra(ClipDescriptionCompat.EXTRA_TASK_ID, task.key.id);
+            intent.putExtra(Intent.EXTRA_USER, UserHandle.of(task.key.userId));
         }
 
         if (clipDescription != null && intent != null) {

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

@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2021 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.launcher3.taskbar;
+
+import com.android.launcher3.BaseQuickstepLauncher;
+import com.android.quickstep.RecentsModel;
+import com.android.quickstep.util.CancellableTask;
+import com.android.systemui.shared.recents.model.Task;
+import com.android.systemui.shared.system.TaskStackChangeListener;
+import com.android.systemui.shared.system.TaskStackChangeListeners;
+
+import java.util.ArrayList;
+
+/**
+ * Works with TaskbarController to update the TaskbarView's Recent items.
+ */
+public class TaskbarRecentsController {
+
+    private final int mNumRecentIcons = 2;
+    private final BaseQuickstepLauncher mLauncher;
+    private final TaskbarController.TaskbarRecentsControllerCallbacks mTaskbarCallbacks;
+    private final RecentsModel mRecentsModel;
+
+    private final TaskStackChangeListener mTaskStackChangeListener = new TaskStackChangeListener() {
+        @Override
+        public void onTaskStackChanged() {
+            reloadRecentTasksIfNeeded();
+        }
+    };
+
+    // TODO: add TaskbarVisualsChangedListener as well (for calendar/clock?)
+
+    // Used to keep track of the last requested task list id, so that we do not request to load the
+    // tasks again if we have already requested it and the task list has not changed
+    private int mTaskListChangeId = -1;
+
+    // The current background requests to load the task icons
+    private CancellableTask[] mIconLoadRequests = new CancellableTask[mNumRecentIcons];
+
+    public TaskbarRecentsController(BaseQuickstepLauncher launcher,
+            TaskbarController.TaskbarRecentsControllerCallbacks taskbarCallbacks) {
+        mLauncher = launcher;
+        mTaskbarCallbacks = taskbarCallbacks;
+        mRecentsModel = RecentsModel.INSTANCE.get(mLauncher);
+    }
+
+    protected void init() {
+        TaskStackChangeListeners.getInstance().registerTaskStackListener(mTaskStackChangeListener);
+        reloadRecentTasksIfNeeded();
+    }
+
+    protected void cleanup() {
+        TaskStackChangeListeners.getInstance().unregisterTaskStackListener(
+                mTaskStackChangeListener);
+        cancelAllPendingIconLoadTasks();
+    }
+
+    private void reloadRecentTasksIfNeeded() {
+        if (!mRecentsModel.isTaskListValid(mTaskListChangeId)) {
+            mTaskListChangeId = mRecentsModel.getTasks(this::onRecentTasksChanged);
+        }
+    }
+
+    private void cancelAllPendingIconLoadTasks() {
+        for (int i = 0; i < mIconLoadRequests.length; i++) {
+            if (mIconLoadRequests[i] != null) {
+                mIconLoadRequests[i].cancel();
+            }
+            mIconLoadRequests[i] = null;
+        }
+    }
+
+    private void onRecentTasksChanged(ArrayList<Task> tasks) {
+        mTaskbarCallbacks.updateRecentItems(tasks);
+    }
+
+    /**
+     * For each Task, loads its icon from the cache in the background, then calls
+     * {@link TaskbarController.TaskbarRecentsControllerCallbacks#updateRecentTaskAtIndex}.
+     */
+    protected void loadIconsForTasks(Task[] tasks) {
+        cancelAllPendingIconLoadTasks();
+        for (int i = 0; i < tasks.length; i++) {
+            Task task = tasks[i];
+            if (task == null) {
+                continue;
+            }
+            final int taskIndex = i;
+            mIconLoadRequests[i] = mRecentsModel.getIconCache().updateIconInBackground(
+                    task, updatedTask -> onTaskIconLoaded(task, taskIndex));
+        }
+    }
+
+    private void onTaskIconLoaded(Task task, int taskIndex) {
+        mTaskbarCallbacks.updateRecentTaskAtIndex(taskIndex, task);
+    }
+
+    protected int getNumRecentIcons() {
+        return mNumRecentIcons;
+    }
+}

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

@@ -19,6 +19,7 @@ import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.RectF;
 import android.graphics.drawable.ColorDrawable;
+import android.graphics.drawable.Drawable;
 import android.util.AttributeSet;
 import android.view.DragEvent;
 import android.view.LayoutInflater;
@@ -35,6 +36,7 @@ import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.R;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
+import com.android.systemui.shared.recents.model.Task;
 
 /**
  * Hosts the Taskbar content such as Hotseat and Recent Apps. Drawn on top of other apps.
@@ -52,6 +54,9 @@ public class TaskbarView extends LinearLayout {
     // Initialized in init().
     private int mHotseatStartIndex;
     private int mHotseatEndIndex;
+    private View mHotseatRecentsDivider;
+    private int mRecentsStartIndex;
+    private int mRecentsEndIndex;
 
     private TaskbarController.TaskbarViewCallbacks mControllerCallbacks;
 
@@ -89,10 +94,17 @@ public class TaskbarView extends LinearLayout {
         mControllerCallbacks = taskbarViewCallbacks;
     }
 
-    protected void init(int numHotseatIcons) {
+    protected void init(int numHotseatIcons, int numRecentIcons) {
         mHotseatStartIndex = 0;
         mHotseatEndIndex = mHotseatStartIndex + numHotseatIcons - 1;
         updateHotseatItems(new ItemInfo[numHotseatIcons]);
+
+        int dividerIndex = mHotseatEndIndex + 1;
+        mHotseatRecentsDivider = addDivider(dividerIndex);
+
+        mRecentsStartIndex = dividerIndex + 1;
+        mRecentsEndIndex = mRecentsStartIndex + numRecentIcons - 1;
+        updateRecentTasks(new Task[numRecentIcons]);
     }
 
     protected void cleanup() {
@@ -147,6 +159,93 @@ public class TaskbarView extends LinearLayout {
                 hotseatView.setOnLongClickListener(null);
             }
         }
+
+        updateHotseatRecentsDividerVisibility();
+    }
+
+    private View addDivider(int dividerIndex) {
+        View divider = inflate(R.layout.taskbar_divider);
+        addView(divider, dividerIndex);
+        return divider;
+    }
+
+    /**
+     * Inflates/binds the Recents items to show in the Taskbar given their Tasks.
+     */
+    protected void updateRecentTasks(Task[] tasks) {
+        for (int i = 0; i < tasks.length; i++) {
+            Task task = tasks[i];
+            int recentsIndex = mRecentsStartIndex + i;
+            View recentsView = getChildAt(recentsIndex);
+
+            // Inflate empty icon Views.
+            if (recentsView == null) {
+                BubbleTextView btv = (BubbleTextView) inflate(R.layout.taskbar_app_icon);
+                LayoutParams lp = new LayoutParams(btv.getIconSize(), btv.getIconSize());
+                lp.setMargins(mItemMarginLeftRight, 0, mItemMarginLeftRight, 0);
+                recentsView = btv;
+                addView(recentsView, recentsIndex, lp);
+            }
+
+            // Apply the Task, or hide the view if there is none for a given index.
+            if (recentsView instanceof BubbleTextView && task != null) {
+                applyTaskToBubbleTextView((BubbleTextView) recentsView, task);
+                recentsView.setVisibility(VISIBLE);
+                recentsView.setOnClickListener(mControllerCallbacks.getItemOnClickListener());
+                recentsView.setOnLongClickListener(
+                        mControllerCallbacks.getItemOnLongClickListener());
+            } else {
+                recentsView.setVisibility(GONE);
+                recentsView.setOnClickListener(null);
+                recentsView.setOnLongClickListener(null);
+            }
+        }
+
+        updateHotseatRecentsDividerVisibility();
+    }
+
+    private void applyTaskToBubbleTextView(BubbleTextView btv, Task task) {
+        if (task.icon != null) {
+            Drawable icon = task.icon.getConstantState().newDrawable().mutate();
+            btv.applyIconAndLabel(icon, task.titleDescription);
+        }
+        btv.setTag(task);
+    }
+
+    protected void updateRecentTaskAtIndex(int taskIndex, Task task) {
+        View taskView = getChildAt(mRecentsStartIndex + taskIndex);
+        if (taskView instanceof BubbleTextView) {
+            applyTaskToBubbleTextView((BubbleTextView) taskView, task);
+        }
+    }
+
+    /**
+     * Make the divider VISIBLE between the Hotseat and Recents if there is at least one icon in
+     * each, otherwise make it GONE.
+     */
+    private void updateHotseatRecentsDividerVisibility() {
+        if (mHotseatRecentsDivider == null) {
+            return;
+        }
+
+        boolean hasAtLeastOneHotseatItem = false;
+        for (int i = mHotseatStartIndex; i <= mHotseatEndIndex; i++) {
+            if (getChildAt(i).getVisibility() != GONE) {
+                hasAtLeastOneHotseatItem = true;
+                break;
+            }
+        }
+
+        boolean hasAtLeastOneRecentItem = false;
+        for (int i = mRecentsStartIndex; i <= mRecentsEndIndex; i++) {
+            if (getChildAt(i).getVisibility() != GONE) {
+                hasAtLeastOneRecentItem = true;
+                break;
+            }
+        }
+
+        mHotseatRecentsDivider.setVisibility(hasAtLeastOneHotseatItem && hasAtLeastOneRecentItem
+                ? VISIBLE : GONE);
     }
 
     @Override

src/com/android/launcher3/BubbleTextView.java

@@ -358,6 +358,16 @@ public class BubbleTextView extends TextView implements ItemInfoUpdateReceiver,
         }
     }
 
+    /**
+     * Directly set the icon and label.
+     */
+    @UiThread
+    public void applyIconAndLabel(Drawable icon, CharSequence label) {
+        setIcon(icon);
+        setText(label);
+        setContentDescription(label);
+    }
+
     /**
      * Overrides the default long press timeout.
      */