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/*
* Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_HTML_IMAGE_DOCUMENT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_IMAGE_DOCUMENT_H_
#include "third_party/blink/renderer/core/html/html_document.h"
namespace blink {
class HTMLDivElement;
class HTMLImageElement;
class ImageResourceContent;
class IntSize;
class CORE_EXPORT ImageDocument final : public HTMLDocument {
public:
explicit ImageDocument(const DocumentInit&);
ImageResourceContent* CachedImage();
HTMLImageElement* ImageElement() const { return image_element_.Get(); }
IntSize ImageSize() const;
void CreateDocumentStructure(ImageResourceContent*);
void WindowSizeChanged();
void ImageUpdated();
void ImageClicked(int x, int y);
void ImageLoaded();
void UpdateImageStyle();
void UpdateTitle();
bool ShouldShrinkToFit() const;
void Trace(Visitor*) const override;
private:
DocumentParser* CreateParser() override;
enum MouseCursorMode { kDefault, kZoomIn, kZoomOut };
// Compute the state of the mouse cursor in the image style.
MouseCursorMode ComputeMouseCursorMode() const;
// Calculates how large the div needs to be to properly center the image.
int CalculateDivWidth();
// These methods are for shrink_to_fit_mode_ == kDesktop.
void ResizeImageToFit();
void RestoreImageSize();
bool ImageFitsInWindow() const;
// Calculates the image size multiplier that's needed to fit the image to
// the window, taking into account page zoom and device scale.
float Scale() const;
Member<HTMLDivElement> div_element_;
Member<HTMLImageElement> image_element_;
// Whether enough of the image has been loaded to determine its size
bool image_size_is_known_;
// Whether the image is shrunk to fit or not
bool did_shrink_image_;
// Whether the image should be shrunk or not
bool should_shrink_image_;
// Whether the image has finished loading or not
bool image_is_loaded_;
enum ShrinkToFitMode { kViewport, kDesktop };
ShrinkToFitMode shrink_to_fit_mode_;
FRIEND_TEST_ALL_PREFIXES(ImageDocumentViewportTest, ZoomForDSFScaleImage);
FRIEND_TEST_ALL_PREFIXES(ImageDocumentViewportTest, DivWidthWithZoomForDSF);
};
template <>
struct DowncastTraits<ImageDocument> {
static bool AllowFrom(const Document& document) {
return document.IsImageDocument();
}
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_HTML_IMAGE_DOCUMENT_H_
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