am a989b334: Merge "Don\'t create a giant layer for all notifications Bug #6642475" into jb-dev

* commit 'a989b334fd097114ce1016ce1668597a213a441c':
  Don't create a giant layer for all notifications Bug #6642475

core/java/android/view/ViewRootImpl.java

@@ -3926,10 +3926,9 @@ public final class ViewRootImpl implements ViewParent,
     }
     
     public void dumpGfxInfo(int[] info) {
+        info[0] = info[1] = 0;
         if (mView != null) {
             getGfxInfo(mView, info);
-        } else {
-            info[0] = info[1] = 0;
         }
     }
 

core/java/android/view/WindowManagerImpl.java

@@ -530,13 +530,16 @@ public class WindowManagerImpl implements WindowManager {
 
                     for (int i = 0; i < count; i++) {
                         ViewRootImpl root = mRoots[i];
+                        String name = getWindowName(root);
+                        pw.printf("\n\t%s", name);
+
                         HardwareRenderer renderer = root.getView().mAttachInfo.mHardwareRenderer;
                         if (renderer != null) {
                             renderer.dumpGfxInfo(pw);
                         }
                     }
 
-                    pw.println("\nView hierarchy:");
+                    pw.println("\nView hierarchy:\n");
 
                     int viewsCount = 0;
                     int displayListsSize = 0;
@@ -546,15 +549,14 @@ public class WindowManagerImpl implements WindowManager {
                         ViewRootImpl root = mRoots[i];
                         root.dumpGfxInfo(info);
 
-                        String name = root.getClass().getName() + '@' +
-                                Integer.toHexString(hashCode());                        
-                        pw.printf("  %s: %d views, %.2f kB (display lists)",
+                        String name = getWindowName(root);
+                        pw.printf("  %s\n  %d views, %.2f kB of display lists",
                                 name, info[0], info[1] / 1024.0f);
                         HardwareRenderer renderer = root.getView().mAttachInfo.mHardwareRenderer;
                         if (renderer != null) {
                             pw.printf(", %d frames rendered", renderer.getFrameCount());
                         }
-                        pw.printf("\n");
+                        pw.printf("\n\n");
 
                         viewsCount += info[0];
                         displayListsSize += info[1];
@@ -570,6 +572,11 @@ public class WindowManagerImpl implements WindowManager {
         }        
     }
 
+    private static String getWindowName(ViewRootImpl root) {
+        return root.mWindowAttributes.getTitle() + "/" +
+                root.getClass().getName() + '@' + Integer.toHexString(root.hashCode());
+    }
+
     public void setStoppedState(IBinder token, boolean stopped) {
         synchronized (this) {
             if (mViews == null)

packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java

@@ -1376,12 +1376,59 @@ public class PhoneStatusBar extends BaseStatusBar {
         if (!mTracking)
             return;
         mTracking = false;
-        mPile.setLayerType(View.LAYER_TYPE_NONE, null);
+        setPileLayers(View.LAYER_TYPE_NONE);
         mVelocityTracker.recycle();
         mVelocityTracker = null;
         mCloseView.setPressed(false);
     }
 
+    /**
+     * Enables or disables layers on the children of the notifications pile.
+     * 
+     * When layers are enabled, this method attempts to enable layers for the minimal
+     * number of children. Only children visible when the notification area is fully
+     * expanded will receive a layer. The technique used in this method might cause
+     * more children than necessary to get a layer (at most one extra child with the
+     * current UI.)
+     * 
+     * @param layerType {@link View#LAYER_TYPE_NONE} or {@link View#LAYER_TYPE_HARDWARE}
+     */
+    private void setPileLayers(int layerType) {
+        final int count = mPile.getChildCount();
+
+        switch (layerType) {
+            case View.LAYER_TYPE_NONE:
+                for (int i = 0; i < count; i++) {
+                    mPile.getChildAt(i).setLayerType(layerType, null);
+                }
+                break;
+            case View.LAYER_TYPE_HARDWARE:
+                final int[] location = new int[2]; 
+                mNotificationPanel.getLocationInWindow(location);
+
+                final int left = location[0];
+                final int top = location[1];
+                final int right = left + mNotificationPanel.getWidth();
+                final int bottom = top + getExpandedViewMaxHeight();
+
+                final Rect childBounds = new Rect();
+
+                for (int i = 0; i < count; i++) {
+                    final View view = mPile.getChildAt(i);
+                    view.getLocationInWindow(location);
+
+                    childBounds.set(location[0], location[1],
+                            location[0] + view.getWidth(), location[1] + view.getHeight());
+
+                    if (childBounds.intersects(left, top, right, bottom)) {
+                        view.setLayerType(layerType, null);
+                    }
+                }
+
+                break;
+        }
+    }
+
     void incrementAnim(long frameTimeNanos) {
         final long deltaNanos = Math.max(frameTimeNanos - mAnimLastTimeNanos, 0);
         final float t = deltaNanos * 0.000000001f;                  // ns -> s
@@ -1421,7 +1468,7 @@ public class PhoneStatusBar extends BaseStatusBar {
         mCloseView.setPressed(true);
 
         mTracking = true;
-        mPile.setLayerType(View.LAYER_TYPE_HARDWARE, null);
+        setPileLayers(View.LAYER_TYPE_HARDWARE);
         mVelocityTracker = VelocityTracker.obtain();
         if (opening) {
             makeExpandedVisible(true);