GEL Integration (2/2)

Launch search from extra panel to mimic Google Launcher.

Changed Trebuchet to build against CM instead of the AOSP SDK.
Added support to swipe left from the home screen to enter Google Now, if it is installed.
A right swipe will return the user to the home screen.

Change-Id: Ia1a77fedea7e67bcd54a6b6d66099f8366d6b1dc

1 files changed, 100 insertions, 0 deletions

diff --git a/src/com/android/launcher3/GelIntegrationHelper.java b/src/com/android/launcher3/GelIntegrationHelper.java
new file mode 100644
index 000000000..abda537a2
--- /dev/null
+++ b/src/com/android/launcher3/GelIntegrationHelper.java
@@ -0,0 +1,100 @@
+package com.android.launcher3;
+
+import android.app.Activity;
+import android.app.ActivityManager;
+import android.content.ComponentName;
+import android.content.Intent;
+import android.service.gesture.EdgeGestureManager;
+import com.android.internal.util.gesture.EdgeGesturePosition;
+
+import java.util.List;
+
+/**
+ * A singleton wrapper class for GEL Integration.
+ * Requires EdgeGestureManager functionality that is only available
+ * in CyanogenMod.
+ */
+public class GelIntegrationHelper {
+    // The Intent for the search activity (resolves to Google Now when installed)
+    public final static String INTENT_ACTION_ASSIST = "android.intent.action.ASSIST";
+
+    private static final String GEL_ACTIVITY = "com.google.android.velvet.ui.VelvetActivity";
+    private static final String GEL_PACKAGE_NAME = "com.google.android.googlequicksearchbox";
+
+    private static final int EDGE_GESTURE_SERVICE_RIGHT_EDGE = 4;
+    private static final int EDGE_GESTURE_SERVICE_NO_EDGE = -1;
+
+    private EdgeGestureManager.EdgeGestureActivationListener mEdgeGestureActivationListener = null;
+    private static GelIntegrationHelper sInstance;
+
+    private GelIntegrationHelper() {}
+
+    public static GelIntegrationHelper getInstance() {
+        if(sInstance == null) {
+            sInstance = new GelIntegrationHelper();
+        }
+        return sInstance;
+    }
+
+    /**
+     * 1. Registers an EdgeGestureActivationListener with the EdgeGestureManager so that
+     *    the user can return to Trebuchet when they swipe from the right edge of the device.
+     * 2. Starts the Google Now Activity with an exit_out_right transition animation so that
+     *    the new Activity appears to slide in as another screen (similar to GEL).
+     */
+    public void registerSwipeBackGestureListenerAndStartGel(final Activity launcherActivity) {
+        EdgeGestureManager edgeGestureManager = EdgeGestureManager.getInstance();
+        if(mEdgeGestureActivationListener == null) {
+            mEdgeGestureActivationListener = new EdgeGestureManager.EdgeGestureActivationListener() {
+                ActivityManager mAm = (ActivityManager)
+                        launcherActivity.getSystemService(Activity.ACTIVITY_SERVICE);
+
+                @Override
+                public void onEdgeGestureActivation(int touchX, int touchY,
+                                                    EdgeGesturePosition position, int flags) {
+                    // Retrieve the top level activity information
+                    List< ActivityManager.RunningTaskInfo > taskInfo = mAm.getRunningTasks(1);
+                    ComponentName topActivityComponentInfo = taskInfo.get(0).topActivity;
+                    String topActivityClassName = topActivityComponentInfo.getClassName();
+                    String topActivityPackageName = topActivityComponentInfo.getPackageName();
+
+                    // If the top level activity is Google Now, return to home.
+                    // Otherwise, do nothing.
+                    if(GEL_ACTIVITY.equals(topActivityClassName)
+                       && GEL_PACKAGE_NAME.equals(topActivityPackageName)) {
+                        Intent homeIntent = new Intent(Intent.ACTION_MAIN);
+                        homeIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                        homeIntent.addCategory(Intent.CATEGORY_HOME);
+                        launcherActivity.startActivity(homeIntent);
+                        launcherActivity.overridePendingTransition(0, R.anim.exit_out_left);
+                        dropEventsUntilLift();
+                    }
+                }
+            };
+            edgeGestureManager.setEdgeGestureActivationListener(mEdgeGestureActivationListener);
+        }
+        mEdgeGestureActivationListener.restoreListenerState();
+        edgeGestureManager.updateEdgeGestureActivationListener(mEdgeGestureActivationListener,
+                                                               EDGE_GESTURE_SERVICE_RIGHT_EDGE);
+
+        // Start the Google Now Activity
+        Intent i = new Intent(INTENT_ACTION_ASSIST);
+        launcherActivity.startActivity(i);
+        launcherActivity.overridePendingTransition(0, R.anim.exit_out_right);
+    }
+
+    /**
+     * Handle necessary cleanup and reset tasks for GEL integration, to be called from onResume.
+     */
+    public void handleGelResume() {
+        // If there is an active EdgeGestureActivationListener for GEL integration,
+        // it should stop listening when we have resumed the launcher.
+        if(mEdgeGestureActivationListener != null) {
+            EdgeGestureManager edgeGestureManager = EdgeGestureManager.getInstance();
+            // Update the listener so it is not listening to any postions (-1)
+            edgeGestureManager.updateEdgeGestureActivationListener(mEdgeGestureActivationListener,
+                                                                   EDGE_GESTURE_SERVICE_NO_EDGE);
+        }
+    }
+
+}