Launcher3: Google Feed integration

If Google Search is installed, the Google Feed can be found at
the -1 screen (which is the very left).
This feature is enabled by default.

Change-Id: I495196818699fd378cd60e6dd61b07a0ab951762

6 files changed, 356 insertions, 10 deletions

diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 6fbbd52fd..87b52bc27 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -3095,19 +3095,18 @@ public class Launcher extends BaseActivity
      * resumed.
      */
     public void tryAndUpdatePredictedApps() {
-        if (!mSharedPrefs.getBoolean("pref_predictive_apps", true)) {
-            mAppsView.setPredictedApps(new ArrayList<>());
-            return;
+        List<ComponentKeyMapper<AppInfo>> apps = null;
+        if (mSharedPrefs.getBoolean("pref_predictive_apps", true)) {
+            if (mLauncherCallbacks == null) {
+                apps = mPredictiveAppsProvider.getPredictions();
+            } else {
+                apps = mLauncherCallbacks.getPredictedApps();
+            }
         }
 
-            List<ComponentKeyMapper<AppInfo>> apps;
-        if (mLauncherCallbacks == null) {
-            apps = mPredictiveAppsProvider.getPredictions();
-        } else {
-            apps = mLauncherCallbacks.getPredictedApps();
+        if (apps != null) {
+            mAppsView.setPredictedApps(apps);
         }
-
-        mAppsView.setPredictedApps(apps);
     }
 
     void lockAllApps() {
diff --git a/src/com/android/launcher3/SettingsActivity.java b/src/com/android/launcher3/SettingsActivity.java
index 63a01d122..be0712e6d 100644
--- a/src/com/android/launcher3/SettingsActivity.java
+++ b/src/com/android/launcher3/SettingsActivity.java
@@ -40,6 +40,7 @@ import android.provider.Settings;
 
 import com.android.launcher3.graphics.IconShapeOverride;
 import com.android.launcher3.notification.NotificationListener;
+import com.android.launcher3.searchlauncher.SearchLauncherCallbacks;
 import com.android.launcher3.util.SettingsObserver;
 import com.android.launcher3.views.ButtonPreference;
 
@@ -58,6 +59,7 @@ public class SettingsActivity extends Activity {
     private static final String KEY_SHOW_DESKTOP_LABELS = "pref_desktop_show_labels";
     private static final String KEY_SHOW_DRAWER_LABELS = "pref_drawer_show_labels";
 
+    public static final String KEY_MINUS_ONE = "pref_enable_minus_one";
     static final String KEY_PREDICTIVE_APPS = "pref_predictive_apps";
     public static final String KEY_WORKSPACE_EDIT = "pref_workspace_edit";
     public static final String KEY_FORCE_ADAPTIVE_ICONS = "pref_icon_force_adaptive";
@@ -135,6 +137,11 @@ public class SettingsActivity extends Activity {
                 mIconBadgingObserver.register(NOTIFICATION_BADGING, NOTIFICATION_ENABLED_LISTENERS);
             }
 
+            SwitchPreference minusOne = (SwitchPreference) findPreference(KEY_MINUS_ONE);
+            if (!Utilities.hasPackageInstalled(getContext(),
+                    SearchLauncherCallbacks.SEARCH_PACKAGE)) {
+                homeGroup.removePreference(minusOne);
+            }
 
             SwitchPreference iconAdaptiveOverride = (SwitchPreference)
                     findPreference(KEY_FORCE_ADAPTIVE_ICONS);
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index 2cb24ab5b..cf4cd79a5 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -747,4 +747,13 @@ public final class Utilities {
         SharedPreferences prefs = getPrefs(context.getApplicationContext());
         return prefs.getBoolean(SettingsActivity.KEY_PREDICTIVE_APPS, false);
     }
+
+    public static boolean hasPackageInstalled(Context context, String pkgName) {
+        try {
+            ApplicationInfo ai = context.getPackageManager().getApplicationInfo(pkgName, 0);
+            return ai.enabled;
+        } catch (PackageManager.NameNotFoundException e) {
+            return false;
+        }
+    }
 }
diff --git a/src/com/android/launcher3/searchlauncher/OverlayCallbackImpl.java b/src/com/android/launcher3/searchlauncher/OverlayCallbackImpl.java
new file mode 100644
index 000000000..796d16e83
--- /dev/null
+++ b/src/com/android/launcher3/searchlauncher/OverlayCallbackImpl.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2016 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.searchlauncher;
+
+import com.android.launcher3.Launcher;
+import com.android.launcher3.Launcher.LauncherOverlay;
+import com.android.launcher3.Launcher.LauncherOverlayCallbacks;
+import com.google.android.libraries.gsa.launcherclient.LauncherClient;
+import com.google.android.libraries.gsa.launcherclient.LauncherClientCallbacks;
+
+/**
+ * Implements {@link LauncherOverlay} and passes all the corresponding events to {@link
+ * LauncherClient}. {@see setClient}
+ *
+ * <p>Implements {@link LauncherClientCallbacks} and sends all the corresponding callbacks to {@link
+ * Launcher}.
+ */
+public class OverlayCallbackImpl implements LauncherOverlay, LauncherClientCallbacks {
+    private final Launcher mLauncher;
+
+    private LauncherClient mClient;
+    private LauncherOverlayCallbacks mLauncherOverlayCallbacks;
+    private boolean mWasOverlayAttached = false;
+
+    public OverlayCallbackImpl(Launcher launcher) {
+        mLauncher = launcher;
+    }
+
+    public void setClient(LauncherClient client) {
+        mClient = client;
+    }
+
+    @Override
+    public void onServiceStateChanged(boolean overlayAttached, boolean hotwordActive) {
+        if (overlayAttached != mWasOverlayAttached) {
+            mWasOverlayAttached = overlayAttached;
+            mLauncher.setLauncherOverlay(overlayAttached ? this : null);
+        }
+    }
+
+    @Override
+    public void onOverlayScrollChanged(float progress) {
+        if (mLauncherOverlayCallbacks != null) {
+            mLauncherOverlayCallbacks.onScrollChanged(progress);
+        }
+    }
+
+    @Override
+    public void onScrollInteractionBegin() {
+        mClient.startMove();
+    }
+
+    @Override
+    public void onScrollInteractionEnd() {
+        mClient.endMove();
+    }
+
+    @Override
+    public void onScrollChange(float progress, boolean rtl) {
+        mClient.updateMove(progress);
+    }
+
+    @Override
+    public void setOverlayCallbacks(Launcher.LauncherOverlayCallbacks callbacks) {
+        mLauncherOverlayCallbacks = callbacks;
+    }
+
+
+}
diff --git a/src/com/android/launcher3/searchlauncher/SearchLauncher.java b/src/com/android/launcher3/searchlauncher/SearchLauncher.java
new file mode 100644
index 000000000..943b24573
--- /dev/null
+++ b/src/com/android/launcher3/searchlauncher/SearchLauncher.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2016 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.searchlauncher;
+
+import com.android.launcher3.Launcher;
+
+public class SearchLauncher extends Launcher {
+
+    public SearchLauncher() {
+        setLauncherCallbacks(new SearchLauncherCallbacks(this));
+    }
+}
diff --git a/src/com/android/launcher3/searchlauncher/SearchLauncherCallbacks.java b/src/com/android/launcher3/searchlauncher/SearchLauncherCallbacks.java
new file mode 100644
index 000000000..530f2d47d
--- /dev/null
+++ b/src/com/android/launcher3/searchlauncher/SearchLauncherCallbacks.java
@@ -0,0 +1,222 @@
+package com.android.launcher3.searchlauncher;
+
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
+import android.os.Bundle;
+import android.view.Menu;
+import android.view.View;
+
+import com.android.launcher3.AppInfo;
+import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherCallbacks;
+import com.android.launcher3.SettingsActivity;
+import com.android.launcher3.Utilities;
+import com.android.launcher3.allapps.search.AllAppsSearchBarController;
+import com.android.launcher3.util.ComponentKey;
+import com.android.launcher3.util.ComponentKeyMapper;
+import com.google.android.libraries.gsa.launcherclient.LauncherClient;
+
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Implementation of {@link LauncherCallbacks} which integrates the Google -1 screen
+ * with launcher
+ */
+public class SearchLauncherCallbacks implements LauncherCallbacks, OnSharedPreferenceChangeListener {
+    public static final String SEARCH_PACKAGE = "com.google.android.googlequicksearchbox";
+
+    private final Launcher mLauncher;
+
+    private OverlayCallbackImpl mOverlayCallbacks;
+    private LauncherClient mLauncherClient;
+
+    private boolean mStarted;
+    private boolean mResumed;
+    private boolean mAlreadyOnHome;
+
+    public SearchLauncherCallbacks(Launcher launcher) {
+        mLauncher = launcher;
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        SharedPreferences prefs = Utilities.getPrefs(mLauncher);
+        mOverlayCallbacks = new OverlayCallbackImpl(mLauncher);
+        mLauncherClient = new LauncherClient(mLauncher, mOverlayCallbacks, getClientOptions(prefs));
+        mOverlayCallbacks.setClient(mLauncherClient);
+        prefs.registerOnSharedPreferenceChangeListener(this);
+    }
+
+    @Override
+    public void onDetachedFromWindow() {
+        mLauncherClient.onDetachedFromWindow();
+    }
+
+    @Override
+    public void onAttachedToWindow() {
+        mLauncherClient.onAttachedToWindow();
+    }
+
+    @Override
+    public void onHomeIntent() {
+        mLauncherClient.hideOverlay(mAlreadyOnHome);
+    }
+
+    @Override
+    public void onResume() {
+        mResumed = true;
+        if (mStarted) {
+            mAlreadyOnHome = true;
+        }
+        mLauncherClient.onResume();
+    }
+
+    @Override
+    public void onPause() {
+        mResumed = false;
+        mLauncherClient.onPause();
+    }
+
+    @Override
+    public void onStart() {
+        mStarted = true;
+        mLauncherClient.onStart();
+    }
+
+    @Override
+    public void onStop() {
+        mStarted = false;
+        if (!mResumed) {
+            mAlreadyOnHome = false;
+        }
+        mLauncherClient.onStop();
+    }
+
+    @Override
+    public void onDestroy() {
+        mLauncherClient.onDestroy();
+        Utilities.getPrefs(mLauncher).unregisterOnSharedPreferenceChangeListener(this);
+    }
+
+    @Override
+    public void onSharedPreferenceChanged(SharedPreferences prefs, String key) {
+        if (SettingsActivity.KEY_MINUS_ONE.equals(key)) {
+            mLauncherClient.setClientOptions(getClientOptions(prefs));
+        }
+    }
+
+    @Override
+    public void preOnCreate() { }
+
+    @Override
+    public void preOnResume() { }
+
+    @Override
+    public void onSaveInstanceState(Bundle outState) { }
+
+    @Override
+    public void onPostCreate(Bundle savedInstanceState) { }
+
+    @Override
+    public void onNewIntent(Intent intent) { }
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data) { }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { }
+
+    @Override
+    public void onWindowFocusChanged(boolean hasFocus) { }
+
+    @Override
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        return false;
+    }
+
+    @Override
+    public void dump(String prefix, FileDescriptor fd, PrintWriter w, String[] args) { }
+
+    @Override
+    public boolean handleBackPressed() {
+        return false;
+    }
+
+    @Override
+    public void onTrimMemory(int level) { }
+
+    @Override
+    public void onLauncherProviderChange() { }
+
+    @Override
+    public void finishBindingItems(boolean upgradePath) { }
+
+    @Override
+    public void bindAllApplications(ArrayList<AppInfo> apps) { }
+
+    @Override
+    public void onWorkspaceLockedChanged() { }
+
+    @Override
+    public void onInteractionBegin() { }
+
+    @Override
+    public void onInteractionEnd() { }
+
+    @Override
+    public boolean hasCustomContentToLeft() {
+        return false;
+    }
+
+    @Override
+    public void populateCustomContentContainer() { }
+
+    @Override
+    public View getQsbBar() {
+        return null;
+    }
+
+    @Override
+    public Bundle getAdditionalSearchWidgetOptions() {
+        return new Bundle();
+    }
+
+    @Override
+    public boolean shouldMoveToDefaultScreenOnHomeIntent() {
+        return false;
+    }
+
+    @Override
+    public boolean hasSettings() {
+        return true;
+    }
+
+    @Override
+    public List<ComponentKeyMapper<AppInfo>> getPredictedApps() {
+        return null;
+    }
+
+    @Override
+    public int getSearchBarHeight() {
+        return SEARCH_BAR_HEIGHT_NORMAL;
+    }
+
+    @Override
+    public boolean startSearch(String initialQuery, boolean selectInitialQuery, Bundle appSearchData) {
+        return false;
+    }
+
+    private LauncherClient.ClientOptions getClientOptions(SharedPreferences prefs) {
+        boolean hasPackage = Utilities.hasPackageInstalled(mLauncher, SEARCH_PACKAGE);
+        boolean isEnabled = prefs.getBoolean(SettingsActivity.KEY_MINUS_ONE, true);
+
+        return new LauncherClient.ClientOptions(hasPackage && isEnabled,
+                true, /* enableHotword */
+                true /* enablePrewarming */
+        );
+    }
+}