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/*
* Copyright (C) 2011 Apple Inc. All rights reserved.
*
* 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. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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 DrawingAreaImpl_h
#define DrawingAreaImpl_h
#include "DrawingArea.h"
#include "Region.h"
#include "RunLoop.h"
namespace WebKit {
struct UpdateInfo;
class DrawingAreaImpl : public DrawingArea {
public:
static PassRefPtr<DrawingAreaImpl> create(WebPage*, const WebPageCreationParameters&);
virtual ~DrawingAreaImpl();
private:
DrawingAreaImpl(WebPage*, const WebPageCreationParameters&);
// DrawingArea
virtual void setNeedsDisplay(const WebCore::IntRect&);
virtual void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollOffset);
virtual void attachCompositingContext();
virtual void detachCompositingContext();
virtual void setRootCompositingLayer(WebCore::GraphicsLayer*);
virtual void scheduleCompositingLayerSync();
virtual void syncCompositingLayers();
virtual void didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*);
// CoreIPC message handlers.
virtual void setSize(const WebCore::IntSize&);
virtual void didUpdate();
virtual void suspendPainting();
virtual void resumePainting();
void scheduleDisplay();
void display();
void display(UpdateInfo&);
Region m_dirtyRegion;
WebCore::IntRect m_scrollRect;
WebCore::IntSize m_scrollOffset;
// Whether we're waiting for a DidUpdate message. Used for throttling paints so that the
// web process won't paint more frequent than the UI process can handle.
bool m_isWaitingForDidUpdate;
// Whether painting is suspended. We'll still keep track of the dirty region but we
// won't paint until painting has resumed again.
bool m_isPaintingSuspended;
RunLoop::Timer<DrawingAreaImpl> m_displayTimer;
};
} // namespace WebKit
#endif // DrawingAreaImpl_h
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