Introduce initial A-Z app drawer to taskbar.

Invoking the drawer is currently hooked up to tapping empty space on the
taskbar. Apps can be launched, and drag-n-drop split screen works. The
drawer can only be dismissed by acting on an app icon or tapping the
taskbar again.

Test: Manual
Bug: 204696617
Change-Id: I7c5fdbc7d54d8209f6f15ef80bfeb5e9b80cf647
diff --git a/quickstep/res/layout/taskbar.xml b/quickstep/res/layout/taskbar.xml
index 3b1d217..c7743ea 100644
--- a/quickstep/res/layout/taskbar.xml
+++ b/quickstep/res/layout/taskbar.xml
@@ -82,4 +82,8 @@
         android:clipToOutline="true"
         android:layout_gravity="bottom"/>
 
+    <include
+        layout="@layout/taskbar_all_apps"
+        android:visibility="gone" />
+
 </com.android.launcher3.taskbar.TaskbarDragLayer>
\ No newline at end of file
diff --git a/quickstep/res/layout/taskbar_all_apps.xml b/quickstep/res/layout/taskbar_all_apps.xml
new file mode 100644
index 0000000..4dbbcc7
--- /dev/null
+++ b/quickstep/res/layout/taskbar_all_apps.xml
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2022 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.
+-->
+<com.android.launcher3.taskbar.TaskbarAllAppsContainerView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/apps_view"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:clipChildren="true"
+    android:clipToPadding="false"
+    android:focusable="false"
+    android:saveEnabled="false"
+    android:theme="?attr/allAppsTheme">
+
+    <include
+        layout="@layout/all_apps_rv_layout"
+        android:visibility="gone" />
+
+    <com.android.launcher3.allapps.FloatingHeaderView
+        android:id="@+id/all_apps_header"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/search_container_all_apps"
+        android:clipToPadding="false"
+        android:paddingTop="@dimen/all_apps_header_top_padding"
+        android:orientation="vertical">
+
+        <include layout="@layout/all_apps_personal_work_tabs" />
+    </com.android.launcher3.allapps.FloatingHeaderView>
+
+    <include layout="@layout/all_apps_fast_scroller" />
+</com.android.launcher3.taskbar.TaskbarAllAppsContainerView>
diff --git a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
index d2ac7c1..4132c68 100644
--- a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
@@ -37,8 +37,8 @@
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.logging.InstanceId;
 import com.android.launcher3.logging.InstanceIdSequence;
+import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.ItemInfoWithIcon;
-import com.android.launcher3.model.data.WorkspaceItemInfo;
 import com.android.launcher3.util.OnboardingPrefs;
 import com.android.quickstep.AnimatedFloat;
 import com.android.quickstep.RecentsAnimationCallbacks;
@@ -238,7 +238,7 @@
     }
 
     @Override
-    public void onTaskbarIconLaunched(WorkspaceItemInfo item) {
+    public void onTaskbarIconLaunched(ItemInfo item) {
         InstanceId instanceId = new InstanceIdSequence().newInstanceId();
         mLauncher.logAppLaunch(mControllers.taskbarActivityContext.getStatsLogManager(), item,
                 instanceId);
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
index 6a59bc2..be6376d 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -64,6 +64,7 @@
 import com.android.launcher3.folder.Folder;
 import com.android.launcher3.folder.FolderIcon;
 import com.android.launcher3.logger.LauncherAtom;
+import com.android.launcher3.model.data.AppInfo;
 import com.android.launcher3.model.data.FolderInfo;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
@@ -100,6 +101,7 @@
 
     private final LayoutInflater mLayoutInflater;
     private final TaskbarDragLayer mDragLayer;
+    private final TaskbarAllAppsContainerView mAppsView;
     private final TaskbarControllers mControllers;
 
     private DeviceProfile mDeviceProfile;
@@ -152,6 +154,7 @@
         TaskbarScrimView taskbarScrimView = mDragLayer.findViewById(R.id.taskbar_scrim);
         FrameLayout navButtonsView = mDragLayer.findViewById(R.id.navbuttons_view);
         StashedHandleView stashedHandleView = mDragLayer.findViewById(R.id.stashed_handle);
+        mAppsView = mDragLayer.findViewById(R.id.apps_view);
 
         Display display = windowContext.getDisplay();
         Context c = display.getDisplayId() == Display.DEFAULT_DISPLAY
@@ -189,7 +192,8 @@
                 new TaskbarEduController(this),
                 new TaskbarAutohideSuspendController(this),
                 new TaskbarPopupController(this),
-                new TaskbarForceVisibleImmersiveController(this));
+                new TaskbarForceVisibleImmersiveController(this),
+                new TaskbarAllAppsViewController(this, mAppsView));
     }
 
     public void init(TaskbarSharedState sharedState) {
@@ -280,6 +284,11 @@
     }
 
     @Override
+    public TaskbarAllAppsContainerView getAppsView() {
+        return mAppsView;
+    }
+
+    @Override
     public DeviceProfile getDeviceProfile() {
         return mDeviceProfile;
     }
@@ -619,11 +628,8 @@
                         String packageName = intent.getPackage();
                         getSystemService(LauncherApps.class)
                                 .startShortcut(packageName, id, null, null, info.user);
-                    } else if (info.user.equals(Process.myUserHandle())) {
-                        startActivity(intent);
                     } else {
-                        getSystemService(LauncherApps.class).startMainActivity(
-                                intent.getComponent(), info.user, intent.getSourceBounds(), null);
+                        startItemInfoActivity(info);
                     }
 
                     mControllers.uiController.onTaskbarIconLaunched(info);
@@ -633,11 +639,32 @@
                     Log.e(TAG, "Unable to launch. tag=" + info + " intent=" + intent, e);
                 }
             }
+        } else if (tag instanceof AppInfo) {
+            startItemInfoActivity((AppInfo) tag);
         } else {
             Log.e(TAG, "Unknown type clicked: " + tag);
         }
 
         AbstractFloatingView.closeAllOpenViews(this);
+        mControllers.taskbarAllAppsViewController.hide();
+    }
+
+    private void startItemInfoActivity(ItemInfo info) {
+        Intent intent = new Intent(info.getIntent())
+                .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        try {
+            if (info.user.equals(Process.myUserHandle())) {
+                // TODO(b/216683257): Use startActivityForResult for search results that require it.
+                startActivity(intent);
+            } else {
+                getSystemService(LauncherApps.class).startMainActivity(
+                        intent.getComponent(), info.user, intent.getSourceBounds(), null);
+            }
+        } catch (NullPointerException | ActivityNotFoundException | SecurityException e) {
+            Toast.makeText(this, R.string.activity_not_found, Toast.LENGTH_SHORT)
+                    .show();
+            Log.e(TAG, "Unable to launch. tag=" + info + " intent=" + intent, e);
+        }
     }
 
     /**
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarAllAppsContainerView.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarAllAppsContainerView.java
new file mode 100644
index 0000000..d6eb716
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarAllAppsContainerView.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2022 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 android.content.Context;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.WindowInsets;
+
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.android.launcher3.allapps.AllAppsGridAdapter;
+import com.android.launcher3.allapps.BaseAllAppsContainerView;
+import com.android.launcher3.allapps.search.SearchAdapterProvider;
+
+/** All apps container accessible from taskbar. */
+public class TaskbarAllAppsContainerView extends BaseAllAppsContainerView<TaskbarActivityContext> {
+    public TaskbarAllAppsContainerView(Context context) {
+        this(context, null);
+    }
+
+    public TaskbarAllAppsContainerView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public TaskbarAllAppsContainerView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    @Override
+    protected SearchAdapterProvider<?> createMainAdapterProvider() {
+        // Task bar all apps does not yet support search, so this implementation is minimal.
+        return new SearchAdapterProvider<TaskbarActivityContext>(mActivityContext) {
+            @Override
+            public boolean launchHighlightedItem() {
+                return false;
+            }
+
+            @Override
+            public View getHighlightedItem() {
+                return null;
+            }
+
+            @Override
+            public RecyclerView.ItemDecoration getDecorator() {
+                return null;
+            }
+
+            @Override
+            public boolean isViewSupported(int viewType) {
+                return false;
+            }
+
+            @Override
+            public void onBindView(AllAppsGridAdapter.ViewHolder holder, int position) { }
+
+            @Override
+            public AllAppsGridAdapter.ViewHolder onCreateViewHolder(LayoutInflater layoutInflater,
+                    ViewGroup parent, int viewType) {
+                return null;
+            }
+        };
+    }
+
+    @Override
+    public WindowInsets onApplyWindowInsets(WindowInsets insets) {
+        // TODO(b/204696617): Switch to status bar insets once they work.
+        setInsets(insets.getInsets(WindowInsets.Type.tappableElement()).toRect());
+        return super.onApplyWindowInsets(insets);
+    }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarAllAppsViewController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarAllAppsViewController.java
new file mode 100644
index 0000000..fb807aa
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarAllAppsViewController.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2022 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 android.view.View;
+
+import com.android.launcher3.DropTarget;
+import com.android.launcher3.R;
+import com.android.launcher3.config.FeatureFlags;
+import com.android.launcher3.dragndrop.DragController;
+import com.android.launcher3.dragndrop.DragOptions;
+import com.android.launcher3.model.data.AppInfo;
+
+/** Handles the {@link TaskbarAllAppsContainerView} initialization and updates. */
+public final class TaskbarAllAppsViewController implements DragController.DragListener {
+
+    private final TaskbarActivityContext mContext;
+    private final TaskbarAllAppsContainerView mAppsView;
+
+    private TaskbarControllers mControllers; // Initialized in init.
+    private boolean mIsOpen;
+
+    public TaskbarAllAppsViewController(
+            TaskbarActivityContext context, TaskbarAllAppsContainerView appsView) {
+        mContext = context;
+        mAppsView = appsView;
+    }
+
+    /** Initialize the controller. */
+    public void init(TaskbarControllers controllers) {
+        if (!FeatureFlags.ENABLE_ALL_APPS_IN_TASKBAR.get()) {
+            return;
+        }
+        mControllers = controllers;
+
+        mAppsView.setOnIconLongClickListener(icon -> {
+            mControllers.taskbarDragController.addDragListener(this);
+            mControllers.taskbarDragController.startDragOnLongClick(icon);
+            return true;
+        });
+
+        // TODO(b/205803230): Remove once entry point button is implemented.
+        mContext.getDragLayer().findViewById(R.id.taskbar_view).setOnClickListener(v -> {
+            if (mIsOpen) {
+                hide();
+            } else {
+                show();
+            }
+        });
+    }
+
+    /** The taskbar apps view. */
+    public TaskbarAllAppsContainerView getAppsView() {
+        return mAppsView;
+    }
+
+    /** Binds the current {@link AppInfo} instances to the {@link TaskbarAllAppsContainerView}. */
+    public void setApps(AppInfo[] apps, int flags) {
+        if (FeatureFlags.ENABLE_ALL_APPS_IN_TASKBAR.get()) {
+            mAppsView.getAppsStore().setApps(apps, flags);
+        }
+    }
+
+    /** Opens the {@link TaskbarAllAppsContainerView}. */
+    public void show() {
+        if (FeatureFlags.ENABLE_ALL_APPS_IN_TASKBAR.get()) {
+            mIsOpen = true;
+            mContext.setTaskbarWindowFullscreen(true);
+            mAppsView.setVisibility(View.VISIBLE);
+        }
+    }
+
+    /** Hides the {@link TaskbarAllAppsContainerView}. */
+    public void hide() {
+        if (FeatureFlags.ENABLE_ALL_APPS_IN_TASKBAR.get()) {
+            mIsOpen = false;
+            mContext.setTaskbarWindowFullscreen(false);
+            mAppsView.setVisibility(View.GONE);
+        }
+    }
+
+    @Override
+    public void onDragStart(DropTarget.DragObject dragObject, DragOptions options) {
+        mControllers.taskbarDragController.removeDragListener(this);
+        mIsOpen = false;
+        mAppsView.setVisibility(View.GONE);
+    }
+
+    @Override
+    public void onDragEnd() { }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
index 8364137..21fbb3b 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
@@ -48,6 +48,7 @@
     public final TaskbarAutohideSuspendController taskbarAutohideSuspendController;
     public final TaskbarPopupController taskbarPopupController;
     public final TaskbarForceVisibleImmersiveController taskbarForceVisibleImmersiveController;
+    public final TaskbarAllAppsViewController taskbarAllAppsViewController;
 
     @Nullable private LoggableTaskbarController[] mControllersToLog = null;
 
@@ -72,7 +73,8 @@
             TaskbarEduController taskbarEduController,
             TaskbarAutohideSuspendController taskbarAutoHideSuspendController,
             TaskbarPopupController taskbarPopupController,
-            TaskbarForceVisibleImmersiveController taskbarForceVisibleImmersiveController) {
+            TaskbarForceVisibleImmersiveController taskbarForceVisibleImmersiveController,
+            TaskbarAllAppsViewController taskbarAllAppsViewController) {
         this.taskbarActivityContext = taskbarActivityContext;
         this.taskbarDragController = taskbarDragController;
         this.navButtonController = navButtonController;
@@ -89,6 +91,7 @@
         this.taskbarAutohideSuspendController = taskbarAutoHideSuspendController;
         this.taskbarPopupController = taskbarPopupController;
         this.taskbarForceVisibleImmersiveController = taskbarForceVisibleImmersiveController;
+        this.taskbarAllAppsViewController = taskbarAllAppsViewController;
     }
 
     /**
@@ -112,6 +115,7 @@
         taskbarEduController.init(this);
         taskbarPopupController.init(this);
         taskbarForceVisibleImmersiveController.init(this);
+        taskbarAllAppsViewController.init(this);
 
         mControllersToLog = new LoggableTaskbarController[] {
                 taskbarDragController, navButtonController, navbarButtonsViewController,
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java
index 3323104..e152915 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java
@@ -182,7 +182,7 @@
                 dragLayerX,
                 dragLayerY,
                 (View target, DropTarget.DragObject d, boolean success) -> {} /* DragSource */,
-                (WorkspaceItemInfo) btv.getTag(),
+                (ItemInfo) btv.getTag(),
                 /* dragVisualizeOffset = */ null,
                 dragRect,
                 scale * iconScale,
@@ -289,8 +289,8 @@
         Object tag = btv.getTag();
         ClipDescription clipDescription = null;
         Intent intent = null;
-        if (tag instanceof WorkspaceItemInfo) {
-            WorkspaceItemInfo item = (WorkspaceItemInfo) tag;
+        if (tag instanceof ItemInfo) {
+            ItemInfo item = (ItemInfo) tag;
             LauncherApps launcherApps = mActivity.getSystemService(LauncherApps.class);
             clipDescription = new ClipDescription(item.title,
                     new String[] {
@@ -300,14 +300,15 @@
                     });
             intent = new Intent();
             if (item.itemType == LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT) {
+                String deepShortcutId = ((WorkspaceItemInfo) item).getDeepShortcutId();
                 intent.putExtra(ClipDescriptionCompat.EXTRA_PENDING_INTENT,
                         launcherApps.getShortcutIntent(
                                 item.getIntent().getPackage(),
-                                item.getDeepShortcutId(),
+                                deepShortcutId,
                                 null,
                                 item.user));
                 intent.putExtra(Intent.EXTRA_PACKAGE_NAME, item.getIntent().getPackage());
-                intent.putExtra(Intent.EXTRA_SHORTCUT_ID, item.getDeepShortcutId());
+                intent.putExtra(Intent.EXTRA_SHORTCUT_ID, deepShortcutId);
             } else {
                 intent.putExtra(ClipDescriptionCompat.EXTRA_PENDING_INTENT,
                         LauncherAppsCompat.getMainActivityLaunchIntent(launcherApps,
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarModelCallbacks.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarModelCallbacks.java
index 910752a..2bafccd 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarModelCallbacks.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarModelCallbacks.java
@@ -21,6 +21,7 @@
 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.model.BgDataModel;
 import com.android.launcher3.model.BgDataModel.FixedContainerItems;
+import com.android.launcher3.model.data.AppInfo;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
 import com.android.launcher3.util.ComponentKey;
@@ -198,6 +199,11 @@
         mControllers.taskbarPopupController.setDeepShortcutMap(deepShortcutMapCopy);
     }
 
+    @Override
+    public void bindAllApplications(AppInfo[] apps, int flags) {
+        mControllers.taskbarAllAppsViewController.setApps(apps, flags);
+    }
+
     protected void dumpLogs(String prefix, PrintWriter pw) {
         pw.println(prefix + "TaskbarModelCallbacks:");
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
index abad906..07b851f 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
@@ -19,8 +19,8 @@
 
 import androidx.annotation.CallSuper;
 
+import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.ItemInfoWithIcon;
-import com.android.launcher3.model.data.WorkspaceItemInfo;
 
 import java.util.stream.Stream;
 
@@ -54,7 +54,8 @@
         return Stream.empty();
     }
 
-    public void onTaskbarIconLaunched(WorkspaceItemInfo item) { }
+    /** Called when an icon is launched. */
+    public void onTaskbarIconLaunched(ItemInfo item) { }
 
     public View getRootView() {
         return mControllers.taskbarActivityContext.getDragLayer();