Fixes #1919280. Home was leaking the gestures window on configuration change.

Dismisses the popup window upon configuration change and correctly restores the
window after the new activity is created. This change also saves/restores the
current gesture and its match. This change also fixes the handling of the back
key when creating a new gesture-based shortcut: the gestures pad is not dismissed
anymore when pressing back in one of the shortcuts dialogs.

src/com/android/launcher/Launcher.java

@@ -174,6 +174,10 @@ public final class Launcher extends Activity implements View.OnClickListener, On
     private static final String RUNTIME_STATE_PENDING_FOLDER_RENAME_ID = "launcher.rename_folder_id";
     // Type: Gesture (Parcelable)
     private static final String RUNTIME_STATE_PENDING_GESTURE = "launcher.gesture";
+    // Type: boolean
+    private static final String RUNTIME_STATE_GESTURES_PANEL = "launcher.gesture_panel_showing";
+    // Type: Gesture (Parcelable)
+    private static final String RUNTIME_STATE_GESTURES_PANEL_GESTURE = "launcher.gesture_panel_gesture";
 
     private static final LauncherModel sModel = new LauncherModel();
 
@@ -515,6 +519,24 @@ public final class Launcher extends Activity implements View.OnClickListener, On
             mRestoring = true;
         }
 
+        boolean gesturesShowing = savedState.getBoolean(RUNTIME_STATE_GESTURES_PANEL, false);
+        if (gesturesShowing) {
+            final Gesture gesture = (Gesture) savedState.get(RUNTIME_STATE_GESTURES_PANEL_GESTURE);
+            mWorkspace.post(new Runnable() {
+                public void run() {
+                    showGesturesPanel(false);
+                    mGesturesProcessor.matchGesture(gesture, false);
+                    mWorkspace.post(new Runnable() {
+                        public void run() {
+                            if (gesture != null) {
+                                mGesturesOverlay.setGesture(gesture);
+                            }
+                        }
+                    });
+                }
+            });
+        }
+
         mCurrentGesture = (Gesture) savedState.get(RUNTIME_STATE_PENDING_GESTURE);
     }
 
@@ -903,6 +925,10 @@ public final class Launcher extends Activity implements View.OnClickListener, On
     }
 
     private void showGesturesPanel() {
+        showGesturesPanel(true);
+    }
+
+    private void showGesturesPanel(boolean animate) {
         resetGesturesPrompt();
 
         mGesturesAdd.setEnabled(false);
@@ -921,7 +947,7 @@ public final class Launcher extends Activity implements View.OnClickListener, On
         } else {
             window = mGesturesWindow;
         }
-        window.setAnimationStyle(com.android.internal.R.style.Animation_SlidingCard);
+        window.setAnimationStyle(animate ? com.android.internal.R.style.Animation_SlidingCard : 0);
 
         final int[] xy = new int[2];
         final DragLayer dragLayer = mDragLayer;
@@ -954,11 +980,24 @@ public final class Launcher extends Activity implements View.OnClickListener, On
         mGesturesPrompt.showNext();
     }
 
+    private void setGesturesPrompt(Drawable icon, CharSequence title) {
+        final TextView prompt = (TextView) mGesturesPrompt.getCurrentView();
+        prompt.setText(title);
+        prompt.setCompoundDrawablesWithIntrinsicBounds(icon, null, null, null);
+        prompt.setClickable(true);
+    }
+
     void hideGesturesPanel() {
+        hideGesturesPanel(true);
+    }
+
+    void hideGesturesPanel(boolean animate) {
         if (mGesturesWindow != null) {
-            mGesturesWindow.setAnimationStyle(com.android.internal.R.style.Animation_SlidingCard);
-            mGesturesWindow.update();
-            mGesturesWindow.dismiss();
+            final PopupWindow popupWindow = mGesturesWindow;
+            popupWindow.setAnimationStyle(animate ?
+                    com.android.internal.R.style.Animation_SlidingCard : 0);
+            popupWindow.update();
+            popupWindow.dismiss();
         }
     }
 
@@ -985,9 +1024,11 @@ public final class Launcher extends Activity implements View.OnClickListener, On
             super.onSaveInstanceState(outState);
         }
 
+        final boolean isConfigurationChange = getChangingConfigurations() != 0;
+
         // When the drawer is opened and we are saving the state because of a
         // configuration change
-        if (mDrawer.isOpened() && getChangingConfigurations() != 0) {
+        if (mDrawer.isOpened() && isConfigurationChange) {
             outState.putBoolean(RUNTIME_STATE_ALL_APPS_FOLDER, true);
         }
 
@@ -1014,6 +1055,15 @@ public final class Launcher extends Activity implements View.OnClickListener, On
         if (mCurrentGesture != null && mWaitingForResult) {
             outState.putParcelable(RUNTIME_STATE_PENDING_GESTURE, mCurrentGesture);
         }
+
+        if (mGesturesWindow != null && mGesturesWindow.isShowing() && isConfigurationChange) {
+            outState.putBoolean(RUNTIME_STATE_GESTURES_PANEL, true);
+
+            final Gesture gesture = mGesturesOverlay.getGesture();
+            if (gesture != null) {
+                outState.putParcelable(RUNTIME_STATE_GESTURES_PANEL_GESTURE, gesture);
+            }
+        }
     }
 
     @Override
@@ -1030,6 +1080,7 @@ public final class Launcher extends Activity implements View.OnClickListener, On
 
         TextKeyListener.getInstance().release();
 
+        hideGesturesPanel(false);
         mAllAppsGrid.clearTextFilter();
         mAllAppsGrid.setAdapter(null);
         sModel.unbind();
@@ -2391,7 +2442,11 @@ public final class Launcher extends Activity implements View.OnClickListener, On
             }
         }
 
-        private void matchGesture(Gesture gesture) {
+        void matchGesture(Gesture gesture) {
+            matchGesture(gesture, true);
+        }
+
+        void matchGesture(Gesture gesture, boolean animate) {
             mGesturesAdd.setAlpha(255);
             mGesturesAdd.setEnabled(true);
 
@@ -2412,24 +2467,38 @@ public final class Launcher extends Activity implements View.OnClickListener, On
 
                         ApplicationInfo info = sModel.queryGesture(Launcher.this, prediction.name);
                         if (info != null) {
-                            updatePrompt(info);
+                            updatePrompt(info, animate);
                         }
                     }
                 }
 
                 if (!match){
-                    setGesturesNextPrompt(null, getString(R.string.gestures_unknown));
+                    if (animate) {
+                        setGesturesNextPrompt(null, getString(R.string.gestures_unknown));
+                    } else {
+                        setGesturesPrompt(null, getString(R.string.gestures_unknown));
+                    }
                 }
             }
         }
 
         private void updatePrompt(ApplicationInfo info) {
+            updatePrompt(info, true);
+        }
+
+        private void updatePrompt(ApplicationInfo info, boolean animate) {
             if (mGesturesAction.intent != null &&
                     info.intent.toURI().equals(mGesturesAction.intent.toURI()) &&
                     info.title.equals(((TextView) mGesturesPrompt.getCurrentView()).getText())) {
                 return;
             }
-            setGesturesNextPrompt(info.icon, info.title);
+
+            if (animate) {
+                setGesturesNextPrompt(info.icon, info.title);
+            } else {
+                setGesturesPrompt(info.icon, info.title);
+            }
+
             mGesturesAction.intent = info.intent;
         }