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 #include "core/css/CSSValueList.h" 30 #include "core/fetch/ResourceFetcher.h" 31 #include "platform/weborigin/Referrer.h" 32 33 namespace WebCore { 34 35 class ResourceFetcher; 36 class StyleFetchedImageSet; 37 class StyleImage; 38 39 class CSSImageSetValue : public CSSValueList { 40 public: 41 create()42 static PassRefPtrWillBeRawPtr<CSSImageSetValue> create() 43 { 44 return adoptRefWillBeNoop(new CSSImageSetValue()); 45 } 46 ~CSSImageSetValue(); 47 48 StyleFetchedImageSet* cachedImageSet(ResourceFetcher*, float deviceScaleFactor, const ResourceLoaderOptions&); 49 StyleFetchedImageSet* cachedImageSet(ResourceFetcher*, float deviceScaleFactor); 50 51 // Returns a StyleFetchedImageSet if the best fit image has been cached already, otherwise a StylePendingImage. 52 StyleImage* cachedOrPendingImageSet(float); 53 54 String customCSSText() const; 55 isPending()56 bool isPending() const { return !m_accessedBestFitImage; } 57 58 struct ImageWithScale { 59 String imageURL; 60 Referrer referrer; 61 float scaleFactor; 62 }; 63 64 bool hasFailedOrCanceledSubresources() const; 65 66 PassRefPtrWillBeRawPtr<CSSImageSetValue> cloneForCSSOM() const; 67 traceAfterDispatch(Visitor * visitor)68 void traceAfterDispatch(Visitor* visitor) { CSSValueList::traceAfterDispatch(visitor); } 69 70 protected: 71 ImageWithScale bestImageForScaleFactor(); 72 73 private: 74 CSSImageSetValue(); 75 explicit CSSImageSetValue(const CSSImageSetValue& cloneFrom); 76 77 void fillImageSet(); compareByScaleFactor(ImageWithScale first,ImageWithScale second)78 static inline bool compareByScaleFactor(ImageWithScale first, ImageWithScale second) { return first.scaleFactor < second.scaleFactor; } 79 80 RefPtr<StyleImage> m_imageSet; 81 bool m_accessedBestFitImage; 82 83 // This represents the scale factor that we used to find the best fit image. It does not necessarily 84 // correspond to the scale factor of the best fit image. 85 float m_scaleFactor; 86 87 Vector<ImageWithScale> m_imagesInSet; 88 }; 89 90 DEFINE_CSS_VALUE_TYPE_CASTS(CSSImageSetValue, isImageSetValue()); 91 92 } // namespace WebCore 93 94 #endif // CSSImageSetValue_h 95