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      1 /*
      2  * Copyright (C) 2006, 2007, 2008, 2009 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 COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     20  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     22  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     23  */
     24 
     25 #ifndef ImageDocument_h
     26 #define ImageDocument_h
     27 
     28 #include "core/html/HTMLDocument.h"
     29 #include "wtf/RefPtr.h"
     30 
     31 namespace WebCore {
     32 
     33 class ImageResource;
     34 class HTMLImageElement;
     35 
     36 class ImageDocument FINAL : public HTMLDocument {
     37 public:
     38     static PassRefPtr<ImageDocument> create(const DocumentInit& initializer = DocumentInit())
     39     {
     40         return adoptRef(new ImageDocument(initializer));
     41     }
     42 
     43     ImageResource* cachedImage();
     44     HTMLImageElement* imageElement() const { return m_imageElement.get(); }
     45 
     46     void windowSizeChanged();
     47     void imageUpdated();
     48     void imageClicked(int x, int y);
     49 
     50 private:
     51     ImageDocument(const DocumentInit&);
     52 
     53     virtual PassRefPtr<DocumentParser> createParser() OVERRIDE;
     54     virtual void dispose() OVERRIDE;
     55 
     56     void createDocumentStructure();
     57     void resizeImageToFit();
     58     void restoreImageSize();
     59     bool imageFitsInWindow() const;
     60     bool shouldShrinkToFit() const;
     61     float scale() const;
     62 
     63     RefPtr<HTMLImageElement> m_imageElement;
     64 
     65     // Whether enough of the image has been loaded to determine its size
     66     bool m_imageSizeIsKnown;
     67 
     68     // Whether the image is shrunk to fit or not
     69     bool m_didShrinkImage;
     70 
     71     // Whether the image should be shrunk or not
     72     bool m_shouldShrinkImage;
     73 };
     74 
     75 inline ImageDocument* toImageDocument(Document* document)
     76 {
     77     ASSERT_WITH_SECURITY_IMPLICATION(!document || document->isImageDocument());
     78     return static_cast<ImageDocument*>(document);
     79 }
     80 
     81 inline const ImageDocument* toImageDocument(const Document* document)
     82 {
     83     ASSERT_WITH_SECURITY_IMPLICATION(!document || document->isImageDocument());
     84     return static_cast<const ImageDocument*>(document);
     85 }
     86 
     87 // This will catch anyone doing an unnecessary cast.
     88 void toImageDocument(const ImageDocument*);
     89 
     90 }
     91 
     92 #endif // ImageDocument_h
     93