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      1 /*
      2  * Copyright (C) 2006 Eric Seidel <eric (at) webkit.org>
      3  * Copyright (C) 2009 Apple Inc. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #ifndef SVGImage_h
     28 #define SVGImage_h
     29 
     30 #include "platform/graphics/Image.h"
     31 #include "platform/heap/Handle.h"
     32 #include "platform/weborigin/KURL.h"
     33 
     34 namespace blink {
     35 
     36 class FrameView;
     37 class Page;
     38 class RenderBox;
     39 class SVGImageChromeClient;
     40 class SVGImageForContainer;
     41 
     42 class SVGImage FINAL : public Image {
     43 public:
     44     static PassRefPtr<SVGImage> create(ImageObserver* observer)
     45     {
     46         return adoptRef(new SVGImage(observer));
     47     }
     48 
     49     static bool isInSVGImage(const Node*);
     50 
     51     RenderBox* embeddedContentBox() const;
     52 
     53     virtual bool isSVGImage() const OVERRIDE { return true; }
     54     virtual IntSize size() const OVERRIDE { return m_intrinsicSize; }
     55     void setURL(const KURL& url) { m_url = url; }
     56 
     57     virtual bool currentFrameHasSingleSecurityOrigin() const OVERRIDE;
     58 
     59     virtual void startAnimation(CatchUpAnimation = CatchUp) OVERRIDE;
     60     virtual void stopAnimation() OVERRIDE;
     61     virtual void resetAnimation() OVERRIDE;
     62 
     63     virtual PassRefPtr<NativeImageSkia> nativeImageForCurrentFrame() OVERRIDE;
     64 
     65     // Returns the SVG image document's frame.
     66     FrameView* frameView() const;
     67 
     68     // Does the SVG image/document contain any animations?
     69     bool hasAnimations() const;
     70 
     71 private:
     72     friend class AXRenderObject;
     73     friend class SVGImageChromeClient;
     74     friend class SVGImageForContainer;
     75 
     76     virtual ~SVGImage();
     77 
     78 
     79     virtual String filenameExtension() const OVERRIDE;
     80 
     81     virtual void setContainerSize(const IntSize&) OVERRIDE;
     82     IntSize containerSize() const;
     83     virtual bool usesContainerSize() const OVERRIDE { return true; }
     84     virtual void computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) OVERRIDE;
     85 
     86     virtual bool dataChanged(bool allDataReceived) OVERRIDE;
     87 
     88     // FIXME: SVGImages are underreporting decoded sizes and will be unable
     89     // to prune because these functions are not implemented yet.
     90     virtual void destroyDecodedData(bool) OVERRIDE { }
     91 
     92     // FIXME: Implement this to be less conservative.
     93     virtual bool currentFrameKnownToBeOpaque() OVERRIDE { return false; }
     94 
     95     SVGImage(ImageObserver*);
     96     virtual void draw(GraphicsContext*, const FloatRect& fromRect, const FloatRect& toRect, CompositeOperator, blink::WebBlendMode) OVERRIDE;
     97     void drawForContainer(GraphicsContext*, const FloatSize, float, const FloatRect&, const FloatRect&, CompositeOperator, blink::WebBlendMode);
     98     void drawPatternForContainer(GraphicsContext*, const FloatSize, float, const FloatRect&, const FloatSize&, const FloatPoint&,
     99         CompositeOperator, const FloatRect&, blink::WebBlendMode, const IntSize& repeatSpacing);
    100 
    101     OwnPtr<SVGImageChromeClient> m_chromeClient;
    102     OwnPtrWillBePersistent<Page> m_page;
    103     IntSize m_intrinsicSize;
    104     KURL m_url;
    105 };
    106 
    107 DEFINE_IMAGE_TYPE_CASTS(SVGImage);
    108 
    109 class ImageObserverDisabler {
    110     WTF_MAKE_NONCOPYABLE(ImageObserverDisabler);
    111 public:
    112     ImageObserverDisabler(Image* image)
    113         : m_image(image)
    114     {
    115         ASSERT(m_image->imageObserver());
    116         m_observer = m_image->imageObserver();
    117         m_image->setImageObserver(0);
    118     }
    119 
    120     ~ImageObserverDisabler()
    121     {
    122         m_image->setImageObserver(m_observer);
    123     }
    124 private:
    125     Image* m_image;
    126     ImageObserver* m_observer;
    127 };
    128 
    129 }
    130 
    131 #endif // SVGImage_h
    132