Send animation start notification back to webkit from ui thread

bug:5239801

depends on external/webkit CL: https://android-git.corp.google.com/g/#/c/152559/

Change-Id: I647b5a82680f570c918227dbf57521b862dcfe25

Author: ChrisCraik

core/java/android/webkit/WebView.java

@@ -4604,14 +4604,15 @@ private void drawCoreAndCursorRing(Canvas canvas, int color,
         boolean UIAnimationsRunning = false;
         // Currently for each draw we compute the animation values;
         // We may in the future decide to do that independently.
-        if (mNativeClass != 0 && nativeEvaluateLayersAnimations(mNativeClass)) {
+        if (mNativeClass != 0 && !canvas.isHardwareAccelerated()
+                && nativeEvaluateLayersAnimations(mNativeClass)) {
             UIAnimationsRunning = true;
             // If we have unfinished (or unstarted) animations,
             // we ask for a repaint. We only need to do this in software
             // rendering (with hardware rendering we already have a different
             // method of requesting a repaint)
-            if (!canvas.isHardwareAccelerated())
-                invalidate();
+            mWebViewCore.sendMessage(EventHub.NOTIFY_ANIMATION_STARTED);
+            invalidate();
         }
 
         // decide which adornments to draw
@@ -8796,10 +8797,13 @@ private void setTouchHighlightRects(ArrayList<Rect> rects) {
 
     /** @hide Called by JNI when pages are swapped (only occurs with hardware
      * acceleration) */
-    protected void pageSwapCallback() {
+    protected void pageSwapCallback(boolean notifyAnimationStarted) {
         if (inEditingMode()) {
             didUpdateWebTextViewDimensions(ANYWHERE);
         }
+        if (notifyAnimationStarted) {
+            mWebViewCore.sendMessage(EventHub.NOTIFY_ANIMATION_STARTED);
+        }
     }
 
     void setNewPicture(final WebViewCore.DrawData draw, boolean updateBaseLayer) {

core/java/android/webkit/WebViewCore.java

@@ -519,7 +519,12 @@ protected void enterFullscreenForVideoLayer(int layerId, String url) {
     /**
      * Update the layers' content
      */
-    private native boolean nativeUpdateLayers(int baseLayer);
+    private native boolean nativeUpdateLayers(int nativeClass, int baseLayer);
+
+    /**
+     * Notify webkit that animations have begun (on the hardware accelerated content)
+     */
+    private native void nativeNotifyAnimationStarted(int nativeClass);
 
     private native boolean nativeFocusBoundsChanged();
 
@@ -1035,6 +1040,8 @@ public class EventHub {
 
         static final int PLUGIN_SURFACE_READY = 195;
 
+        static final int NOTIFY_ANIMATION_STARTED = 196;
+
         // private message ids
         private static final int DESTROY =     200;
 
@@ -1594,6 +1601,10 @@ public void handleMessage(Message msg) {
                             nativePluginSurfaceReady();
                             break;
 
+                        case NOTIFY_ANIMATION_STARTED:
+                            nativeNotifyAnimationStarted(mNativeClass);
+                            break;
+
                         case ADD_PACKAGE_NAMES:
                             if (BrowserFrame.sJavaBridge == null) {
                                 throw new IllegalStateException("No WebView " +
@@ -2015,7 +2026,7 @@ private void webkitDrawLayers() {
             return;
         }
         // Directly update the layers we last passed to the UI side
-        if (nativeUpdateLayers(mLastDrawData.mBaseLayer)) {
+        if (nativeUpdateLayers(mNativeClass, mLastDrawData.mBaseLayer)) {
             // If anything more complex than position has been touched, let's do a full draw
             webkitDraw();
         }

tests/TileBenchmark/src/com/test/tilebenchmark/ProfiledWebView.java

@@ -110,9 +110,9 @@ public void onFinish() {
      * been redrawn.
      */
     @Override
-    protected void pageSwapCallback() {
+    protected void pageSwapCallback(boolean startAnim) {
         mContentInvalMillis = System.currentTimeMillis() - mContentInvalMillis;
-        super.pageSwapCallback();
+        super.pageSwapCallback(startAnim);
         Log.d("ProfiledWebView", "REDRAW TOOK " + mContentInvalMillis
                 + "millis");
         mIsTesting = true;