1/* 2 * Copyright (C) 2012 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 INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef CSSImageSetValue_h 27#define CSSImageSetValue_h 28 29#if ENABLE(CSS_IMAGE_SET) 30 31#include "CSSValueList.h" 32 33namespace WebCore { 34 35class CachedResourceLoader; 36class Document; 37class StyleCachedImageSet; 38class StyleImage; 39 40class CSSImageSetValue : public CSSValueList { 41public: 42 43 static PassRefPtr<CSSImageSetValue> create() 44 { 45 return adoptRef(new CSSImageSetValue()); 46 } 47 ~CSSImageSetValue(); 48 49 StyleCachedImageSet* cachedImageSet(CachedResourceLoader*); 50 51 // Returns a StyleCachedImageSet if the best fit image has been cached already, otherwise a StylePendingImage. 52 StyleImage* cachedOrPendingImageSet(Document*); 53 54 String customCssText() const; 55 56 bool isPending() const { return !m_accessedBestFitImage; } 57 58 struct ImageWithScale { 59 String imageURL; 60 float scaleFactor; 61 }; 62 63 bool hasFailedOrCanceledSubresources() const; 64 65 PassRefPtr<CSSImageSetValue> cloneForCSSOM() const; 66 67protected: 68 ImageWithScale bestImageForScaleFactor(); 69 70private: 71 CSSImageSetValue(); 72 CSSImageSetValue(const CSSImageSetValue& cloneFrom); 73 74 void detachPendingImage(); 75 void fillImageSet(); 76 static inline bool compareByScaleFactor(ImageWithScale first, ImageWithScale second) { return first.scaleFactor < second.scaleFactor; } 77 78 RefPtr<StyleImage> m_imageSet; 79 bool m_accessedBestFitImage; 80 81 // This represents the scale factor that we used to find the best fit image. It does not necessarily 82 // correspond to the scale factor of the best fit image. 83 float m_scaleFactor; 84 85 Vector<ImageWithScale> m_imagesInSet; 86}; 87 88} // namespace WebCore 89 90#endif // ENABLE(CSS_IMAGE_SET) 91 92#endif // CSSImageSetValue_h 93