Factor GraphicsLayerUpdater out of RenderLayerCompositor

Source/core/rendering/compositing/GraphicsLayerUpdater.h

 /*
- * Copyright (C) 2008 Apple Inc. All Rights Reserved.
+ * Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2014 Google Inc. All rights reserved.
  *

[esprehn, 2014/03/01 09:37:07]

This is a brand new file, lets use the new copyright! :)

[abarth-chromium, 2014/03/01 09:40:39]

It contains code from an old file.  No fair laundering copyright.

  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
  */
 
-#ifndef SuspendableTimer_h
-#define SuspendableTimer_h
+#ifndef GraphicsLayerUpdater_h
+#define GraphicsLayerUpdater_h
 
-#include "core/dom/ActiveDOMObject.h"
-#include "platform/Timer.h"
+#include "wtf/Vector.h"
 
 namespace WebCore {
 
-class SuspendableTimer : public TimerBase, public ActiveDOMObject {
+class GraphicsLayer;
+class RenderLayer;
+class RenderPart;
+class RenderView;
+
+class GraphicsLayerUpdater {
 public:
-    explicit SuspendableTimer(ExecutionContext*);
-    virtual ~SuspendableTimer();
+    explicit GraphicsLayerUpdater(RenderView&);
+    ~GraphicsLayerUpdater();
 
-    // ActiveDOMObject
-    virtual bool hasPendingActivity() const OVERRIDE FINAL;
-    virtual void stop() OVERRIDE;
-    virtual void suspend() OVERRIDE FINAL;
-    virtual void resume() OVERRIDE FINAL;
+    void updateRecursive(RenderLayer*);
+    void rebuildTree(RenderLayer*, Vector<GraphicsLayer*>& childLayersOfEnclosingLayer, int depth);
+
+    // Return true if the layers changed.
+    static bool parentFrameContentLayers(RenderPart*);

[esprehn, 2014/03/01 09:37:07]

Should it also take a RenderPart& ? Also parentFrameContentLayers is super weird
for a boolean returning method.

[abarth-chromium, 2014/03/01 09:40:39]

This function makes zero sense.  I can leave it in the old location if you
prefer.

 
 private:
-    virtual void fired() = 0;
+    void update(RenderLayer*);

[esprehn, 2014/03/01 09:37:07]

RenderLayer& ?

[abarth-chromium, 2014/03/01 09:40:39]

Sure.

 
-    double m_nextFireInterval;
-    double m_repeatInterval;
-    bool m_active;
-#if !ASSERT_DISABLED
-    bool m_suspended;
-#endif
+    RenderView& m_renderView;
+
+    // Used for gathering UMA data about the effect on memory usage of promoting all layers
+    // that have a webkit-transition on opacity or transform and intersect the viewport.
+    double m_pixelsWithoutPromotingAllTransitions;
+    double m_pixelsAddedByPromotingAllTransitions;
 };
 
 } // namespace WebCore
 
-#endif // SuspendableTimer_h
+#endif // GraphicsLayerUpdater_h