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);
+        }
+    }
+
+}