third_party/WebKit/Source/core/html/ImageDocument.h

   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 blink {
  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     DECLARE_VIRTUAL_TRACE();
  56
  57 private:
  58     explicit ImageDocument(const DocumentInit&);
  59
  60     PassRefPtrWillBeRawPtr<DocumentParser> createParser() override;
  61 #if !ENABLE(OILPAN)
  62     void dispose() override;
  63 #endif
  64
  65     void createDocumentStructure(bool loadingMultipartContent);
  66
  67     // These methods are for m_shrinkToFitMode == Desktop.
  68     void resizeImageToFit(ScaleType);
  69     void restoreImageSize(ScaleType);
  70     bool imageFitsInWindow() const;
  71     bool shouldShrinkToFit() const;
  72     float scale() const;
  73
  74     RefPtrWillBeMember<HTMLImageElement> m_imageElement;
  75
  76     // Whether enough of the image has been loaded to determine its size
  77     bool m_imageSizeIsKnown;
  78
  79     // Whether the image is shrunk to fit or not
  80     bool m_didShrinkImage;
  81
  82     // Whether the image should be shrunk or not
  83     bool m_shouldShrinkImage;
  84
  85     enum ShrinkToFitMode {
  86         Viewport,
  87         Desktop
  88     };
  89     ShrinkToFitMode m_shrinkToFitMode;
  90 };
  91
  92 DEFINE_DOCUMENT_TYPE_CASTS(ImageDocument);
  93
  94 }
  95
  96 #endif // ImageDocument_h