Launcher3: support google now tab

Change-Id: I6efc1d5186e0f1bd4fa78ae7231999b984ce7222

src/com/android/launcher3/Launcher.java

@@ -355,6 +355,8 @@ public void run() {
     public ViewGroupFocusHelper mFocusHandler;
     private boolean mRotationEnabled = false;
 
+    private LauncherTab mLauncherTab;
+
     @Thunk void setOrientation() {
         if (mRotationEnabled) {
             unlockScreenOrientation(true);
@@ -456,6 +458,8 @@ protected void onCreate(Bundle savedInstanceState) {
         IntentFilter filter = new IntentFilter(ACTION_APPWIDGET_HOST_RESET);
         registerReceiver(mUiBroadcastReceiver, filter);
 
+        mLauncherTab = new LauncherTab(this);
+
         mRotationEnabled = getResources().getBoolean(R.bool.allow_rotation);
         // In case we are on a device with locked rotation, we should look at preferences to check
         // if the user has specifically allowed rotation.
@@ -1059,6 +1063,9 @@ protected void onResume() {
             mAllAppsController.showDiscoveryBounce();
         }
         mIsResumeFromActionScreenOff = false;
+
+        mLauncherTab.getClient().onResume();
+
         if (mLauncherCallbacks != null) {
             mLauncherCallbacks.onResume();
         }
@@ -1080,6 +1087,8 @@ protected void onPause() {
             mWorkspace.getCustomContentCallbacks().onHide();
         }
 
+        mLauncherTab.getClient().onPause();
+
         if (mLauncherCallbacks != null) {
             mLauncherCallbacks.onPause();
         }
@@ -1620,6 +1629,8 @@ public void onAttachedToWindow() {
         mAttached = true;
         mVisible = true;
 
+        mLauncherTab.getClient().onAttachedToWindow();
+
         if (mLauncherCallbacks != null) {
             mLauncherCallbacks.onAttachedToWindow();
         }
@@ -1636,6 +1647,8 @@ public void onDetachedFromWindow() {
         }
         updateAutoAdvanceState();
 
+        mLauncherTab.getClient().onDetachedFromWindow();
+
         if (mLauncherCallbacks != null) {
             mLauncherCallbacks.onDetachedFromWindow();
         }
@@ -1865,6 +1878,8 @@ protected void onNewIntent(Intent intent) {
                 mWidgetsView.scrollToTop();
             }
 
+            mLauncherTab.getClient().hideOverlay(true);
+
             if (mLauncherCallbacks != null) {
                 mLauncherCallbacks.onHomeIntent();
             }
@@ -1978,6 +1993,8 @@ public void onDestroy() {
 
         LauncherAnimUtils.onDestroyActivity();
 
+        mLauncherTab.getClient().onDestroy();
+
         if (mLauncherCallbacks != null) {
             mLauncherCallbacks.onDestroy();
         }

src/com/android/launcher3/LauncherTab.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2017 Paranoid Android
+ *
+ * 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;
+
+import com.android.launcher3.Launcher.LauncherOverlay;
+import com.android.launcher3.Launcher.LauncherOverlayCallbacks;
+
+import com.google.android.libraries.launcherclient.LauncherClient;
+import com.google.android.libraries.launcherclient.LauncherClientCallbacksAdapter;
+
+public class LauncherTab {
+
+    private Launcher mLauncher;
+
+    private LauncherClient mLauncherClient;
+
+    public LauncherTab(Launcher launcher) {
+        mLauncher = launcher;
+        mLauncherClient = new LauncherClient(launcher, new LauncherClientCallbacksAdapter(), true);
+
+        launcher.setLauncherOverlay(new LauncherOverlays());
+    }
+
+    protected LauncherClient getClient() {
+        return mLauncherClient;
+    }
+
+    private class LauncherOverlays implements LauncherOverlay {
+        @Override
+        public void onScrollInteractionBegin() {
+            mLauncherClient.startMove();
+        }
+
+        @Override
+        public void onScrollInteractionEnd() {
+            mLauncherClient.endMove();
+        }
+
+        @Override
+        public void onScrollChange(float progress, boolean rtl) {
+            mLauncherClient.updateMove(progress);
+        }
+
+        @Override
+        public void setOverlayCallbacks(LauncherOverlayCallbacks callbacks) {
+        }
+    }
+}