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

4 files changed, 153 insertions, 7 deletions

diff --git a/src/com/android/launcher3/lineage/LineageLauncherCallbacks.java b/src/com/android/launcher3/lineage/LineageLauncherCallbacks.java
index f71ad72e8..2e6e66728 100644
--- a/src/com/android/launcher3/lineage/LineageLauncherCallbacks.java
+++ b/src/com/android/launcher3/lineage/LineageLauncherCallbacks.java
@@ -21,6 +21,10 @@ import android.os.Bundle;
 
 import com.android.launcher3.AppInfo;
 import com.android.launcher3.LauncherCallbacks;
+import com.android.launcher3.settings.SettingsActivity;
+import com.android.launcher3.Utilities;
+
+import com.google.android.libraries.gsa.launcherclient.LauncherClient;
 
 import java.io.FileDescriptor;
 import java.io.PrintWriter;
@@ -28,9 +32,16 @@ import java.util.ArrayList;
 
 public class LineageLauncherCallbacks implements LauncherCallbacks,
         SharedPreferences.OnSharedPreferenceChangeListener {
+    public static final String SEARCH_PACKAGE = "com.google.android.googlequicksearchbox";
 
     private final LineageLauncher mLauncher;
 
+    private OverlayCallbackImpl mOverlayCallbacks;
+    private LauncherClient mLauncherClient;
+
+    private boolean mStarted;
+    private boolean mResumed;
+    private boolean mAlreadyOnHome;
 
     public LineageLauncherCallbacks(LineageLauncher launcher) {
         mLauncher = launcher;
@@ -38,32 +49,50 @@ public class LineageLauncherCallbacks implements LauncherCallbacks,
 
     @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 onResume() {
+        mResumed = true;
+        if (mStarted) {
+            mAlreadyOnHome = true;
+        }
 
+        mLauncherClient.onResume();
     }
 
     @Override
     public void onStart() {
-
+        mStarted = true;
+        mLauncherClient.onStart();
     }
 
     @Override
     public void onStop() {
+        mStarted = false;
+        if (!mResumed) {
+            mAlreadyOnHome = false;
+        }
 
+        mLauncherClient.onStop();
     }
 
     @Override
     public void onPause() {
-
+        mResumed = false;
+        mLauncherClient.onPause();
     }
 
     @Override
     public void onDestroy() {
+        mLauncherClient.onDestroy();
 
+        Utilities.getPrefs(mLauncher).unregisterOnSharedPreferenceChangeListener(this);
     }
 
     @Override
@@ -83,12 +112,12 @@ public class LineageLauncherCallbacks implements LauncherCallbacks,
 
     @Override
     public void onAttachedToWindow() {
-
+        mLauncherClient.onAttachedToWindow();
     }
 
     @Override
     public void onDetachedFromWindow() {
-
+        mLauncherClient.onDetachedFromWindow();
     }
 
     @Override
@@ -98,7 +127,7 @@ public class LineageLauncherCallbacks implements LauncherCallbacks,
 
     @Override
     public void onHomeIntent(boolean internalStateHandled) {
-
+        mLauncherClient.hideOverlay(mAlreadyOnHome);
     }
 
     @Override
@@ -123,6 +152,17 @@ public class LineageLauncherCallbacks implements LauncherCallbacks,
 
     @Override
     public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
-
+        if (SettingsActivity.KEY_MINUS_ONE.equals(key)) {
+            mLauncherClient.setClientOptions(getClientOptions(sharedPreferences));
+        }
+    }
+
+    private LauncherClient.ClientOptions getClientOptions(SharedPreferences prefs) {
+        boolean hasPackage = LineageUtils.hasPackageInstalled(mLauncher, SEARCH_PACKAGE);
+        boolean isEnabled = prefs.getBoolean(SettingsActivity.KEY_MINUS_ONE, true);
+        return new LauncherClient.ClientOptions(hasPackage && isEnabled,
+                true, /* enableHotword */
+                true /* enablePrewarming */
+        );
     }
 }
diff --git a/src/com/android/launcher3/lineage/LineageUtils.java b/src/com/android/launcher3/lineage/LineageUtils.java
new file mode 100644
index 000000000..ae324dd10
--- /dev/null
+++ b/src/com/android/launcher3/lineage/LineageUtils.java
@@ -0,0 +1,17 @@
+package com.android.launcher3.lineage;
+
+import android.content.Context;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+
+public class LineageUtils {
+
+    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/lineage/OverlayCallbackImpl.java b/src/com/android/launcher3/lineage/OverlayCallbackImpl.java
new file mode 100644
index 000000000..d0d6756a4
--- /dev/null
+++ b/src/com/android/launcher3/lineage/OverlayCallbackImpl.java
@@ -0,0 +1,80 @@
+/*
+ * 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.lineage;
+
+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/settings/SettingsActivity.java b/src/com/android/launcher3/settings/SettingsActivity.java
index 18b6094fb..6209c5ef0 100644
--- a/src/com/android/launcher3/settings/SettingsActivity.java
+++ b/src/com/android/launcher3/settings/SettingsActivity.java
@@ -37,6 +37,8 @@ import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.graphics.GridOptionsProvider;
+import com.android.launcher3.lineage.LineageLauncherCallbacks;
+import com.android.launcher3.lineage.LineageUtils;
 import com.android.launcher3.uioverrides.plugins.PluginManagerWrapper;
 import com.android.launcher3.util.SecureSettingsObserver;
 
@@ -69,6 +71,8 @@ public class SettingsActivity extends Activity
 
     public static final String GRID_OPTIONS_PREFERENCE_KEY = "pref_grid_options";
 
+    public static final String KEY_MINUS_ONE = "pref_enable_minus_one";
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -230,6 +234,11 @@ public class SettingsActivity extends Activity
                     // Show if plugins are enabled or flag UI is enabled.
                     return FeatureFlags.showFlagTogglerUi(getContext()) ||
                             PluginManagerWrapper.hasPlugins(getContext());
+
+                case KEY_MINUS_ONE:
+                    return LineageUtils.hasPackageInstalled(getActivity(),
+                            LineageLauncherCallbacks.SEARCH_PACKAGE);
+
                 case GRID_OPTIONS_PREFERENCE_KEY:
                     return Utilities.isDevelopersOptionsEnabled(getContext()) &&
                             Utilities.IS_DEBUG_DEVICE &&