Introduce TaskOrganizer

A first take at the TaskOrganizer API for allowing SysUI to control task presentation.
In this CL we introduce the first two primitives:
        1. The interface itself for implementation by SysUI
        2. Support for organizing a given windowing mode (but atm really only PIP)
We include a sample app that manages the PIP from an APPLICATION_OVERLAY window.

Bug: 139371701
Test: wmtests/TaskOrganizerTests. TaskOrganizerPipTest
Change-Id: I44a8ed311bc5f06285bba2c6ff3b37a7d19a9190

1 files changed, 127 insertions, 0 deletions

diff --git a/tests/TaskOrganizerTest/src/com/android/test/taskembed/TaskOrganizerPipTest.java b/tests/TaskOrganizerTest/src/com/android/test/taskembed/TaskOrganizerPipTest.java
new file mode 100644
index 000000000000..6ffa19d4ec98
--- /dev/null
+++ b/tests/TaskOrganizerTest/src/com/android/test/taskembed/TaskOrganizerPipTest.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2019 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.test.taskembed;
+
+import android.app.ActivityManager;
+import android.app.ActivityTaskManager;
+import android.app.Service;
+import android.app.WindowConfiguration;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Rect;
+import android.os.IBinder;
+import android.view.ITaskOrganizer;
+import android.view.IWindowContainer;
+import android.view.WindowContainerTransaction;
+import android.view.SurfaceControl;
+import android.view.SurfaceHolder;
+import android.view.SurfaceView;
+import android.view.ViewGroup;
+import android.view.WindowManager;
+import android.widget.FrameLayout;
+
+public class TaskOrganizerPipTest extends Service {
+    static final int PIP_WIDTH  = 640;
+    static final int PIP_HEIGHT = 360;
+
+    class PipOrgView extends SurfaceView implements SurfaceHolder.Callback {
+        PipOrgView(Context c) {
+            super(c);
+            getHolder().addCallback(this);
+            setZOrderOnTop(true);
+        }
+        @Override
+        public void surfaceCreated(SurfaceHolder holder) {
+            try {
+                ActivityTaskManager.getService().registerTaskOrganizer(mOrganizer,
+                        WindowConfiguration.WINDOWING_MODE_PINNED);
+            } catch (Exception e) {
+            }
+        }
+
+        @Override
+        public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
+        }
+
+        @Override
+        public void surfaceDestroyed(SurfaceHolder holder) {
+        }
+
+        void reparentTask(IWindowContainer wc) {
+            SurfaceControl.Transaction t = new SurfaceControl.Transaction();
+            SurfaceControl leash = null;
+            try {
+                leash = wc.getLeash();
+            } catch (Exception e) {
+                // System server died.. oh well
+            }
+            t.reparent(leash, getSurfaceControl())
+                .setPosition(leash, 0, 0)
+                .apply();
+        }
+    }
+
+    PipOrgView mPipView;
+
+    class Organizer extends ITaskOrganizer.Stub {
+        public void taskAppeared(IWindowContainer wc, ActivityManager.RunningTaskInfo ti) {
+            mPipView.reparentTask(wc);
+
+            final WindowContainerTransaction wct = new WindowContainerTransaction();
+            wct.scheduleFinishEnterPip(wc, new Rect(0, 0, PIP_WIDTH, PIP_HEIGHT));
+            try {
+                ActivityTaskManager.getService().applyContainerTransaction(wct);
+            } catch (Exception e) {
+            }
+        }
+        public void taskVanished(IWindowContainer wc) {
+        }
+        public void transactionReady(int id, SurfaceControl.Transaction t) {
+        }
+    }
+
+    Organizer mOrganizer = new Organizer();
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+
+        final WindowManager.LayoutParams wlp = new WindowManager.LayoutParams();
+        wlp.setTitle("TaskOrganizerPipTest");
+        wlp.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
+        wlp.width = wlp.height = ViewGroup.LayoutParams.WRAP_CONTENT;
+
+        FrameLayout layout = new FrameLayout(this);
+        ViewGroup.LayoutParams lp =
+            new ViewGroup.LayoutParams(PIP_WIDTH, PIP_HEIGHT);
+        mPipView = new PipOrgView(this);
+        layout.addView(mPipView, lp);
+
+        WindowManager wm = getSystemService(WindowManager.class);
+        wm.addView(layout, wlp);
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+    }
+}