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      1 /*
      2  * Copyright (C) 2010 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
     14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
     17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     23  * THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef DrawingArea_h
     27 #define DrawingArea_h
     28 
     29 #include "DrawingAreaInfo.h"
     30 #include <WebCore/IntRect.h>
     31 #include <wtf/Noncopyable.h>
     32 #include <wtf/PassOwnPtr.h>
     33 
     34 namespace CoreIPC {
     35     class ArgumentDecoder;
     36     class Connection;
     37     class MessageID;
     38 }
     39 
     40 namespace WebCore {
     41     class GraphicsLayer;
     42 }
     43 
     44 namespace WebKit {
     45 
     46 class WebPage;
     47 struct WebPageCreationParameters;
     48 
     49 class DrawingArea {
     50     WTF_MAKE_NONCOPYABLE(DrawingArea);
     51 
     52 public:
     53     static PassOwnPtr<DrawingArea> create(WebPage*, const WebPageCreationParameters&);
     54     virtual ~DrawingArea();
     55 
     56 #if PLATFORM(MAC) || PLATFORM(WIN)
     57     void didReceiveDrawingAreaMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*);
     58 #endif
     59 
     60     virtual void setNeedsDisplay(const WebCore::IntRect&) = 0;
     61     virtual void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollOffset) = 0;
     62 
     63     // FIXME: These should be pure virtual.
     64     virtual void pageBackgroundTransparencyChanged() { }
     65     virtual void forceRepaint() { }
     66 
     67     virtual void didInstallPageOverlay() { }
     68     virtual void didUninstallPageOverlay() { }
     69     virtual void setPageOverlayNeedsDisplay(const WebCore::IntRect&) { }
     70 
     71 #if USE(ACCELERATED_COMPOSITING)
     72     virtual void setRootCompositingLayer(WebCore::GraphicsLayer*) = 0;
     73     virtual void scheduleCompositingLayerSync() = 0;
     74     virtual void syncCompositingLayers() = 0;
     75 #endif
     76 
     77     virtual void didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*) = 0;
     78 
     79 protected:
     80     DrawingArea(DrawingAreaType, WebPage*);
     81 
     82     DrawingAreaType m_type;
     83     WebPage* m_webPage;
     84 
     85 private:
     86     // CoreIPC message handlers.
     87     // FIXME: These should be pure virtual.
     88     virtual void updateBackingStoreState(uint64_t backingStoreStateID, bool respondImmediately, const WebCore::IntSize& size, const WebCore::IntSize& scrollOffset) { }
     89     virtual void didUpdate() { }
     90     virtual void suspendPainting() { }
     91     virtual void resumePainting() { }
     92 };
     93 
     94 } // namespace WebKit
     95 
     96 #endif // DrawingArea_h
     97