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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 PassRefPtrWillBeRawPtr<ImageDocument> create(const DocumentInit& initializer = DocumentInit())
     39     {
     40         return adoptRefWillBeNoop(new ImageDocument(initializer));
     41     }
     42 
     43     enum ScaleType {
     44         ScaleZoomedDocument,
     45         ScaleOnlyUnzoomedDocument
     46     };
     47 
     48     ImageResource* cachedImage();
     49     HTMLImageElement* imageElement() const { return m_imageElement.get(); }
     50 
     51     void windowSizeChanged(ScaleType);
     52     void imageUpdated();
     53     void imageClicked(int x, int y);
     54 
     55     virtual void trace(Visitor*) OVERRIDE;
     56 
     57 private:
     58     explicit ImageDocument(const DocumentInit&);
     59 
     60     virtual PassRefPtrWillBeRawPtr<DocumentParser> createParser() OVERRIDE;
     61 #if !ENABLE(OILPAN)
     62     virtual void dispose() OVERRIDE;
     63 #endif
     64 
     65     void createDocumentStructure();
     66     void resizeImageToFit(ScaleType);
     67     void restoreImageSize(ScaleType);
     68     bool imageFitsInWindow() const;
     69     bool shouldShrinkToFit() const;
     70     float scale() const;
     71 
     72     RefPtrWillBeMember<HTMLImageElement> m_imageElement;
     73 
     74     // Whether enough of the image has been loaded to determine its size
     75     bool m_imageSizeIsKnown;
     76 
     77     // Whether the image is shrunk to fit or not
     78     bool m_didShrinkImage;
     79 
     80     // Whether the image should be shrunk or not
     81     bool m_shouldShrinkImage;
     82 };
     83 
     84 DEFINE_DOCUMENT_TYPE_CASTS(ImageDocument);
     85 
     86 }
     87 
     88 #endif // ImageDocument_h
     89