1 /* 2 * Copyright (C) 2010 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. ``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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef StylePendingImage_h 27 #define StylePendingImage_h 28 29 #include "core/css/CSSCursorImageValue.h" 30 #include "core/css/CSSImageGeneratorValue.h" 31 #include "core/css/CSSImageSetValue.h" 32 #include "core/css/CSSImageValue.h" 33 #include "core/rendering/style/StyleImage.h" 34 #include "platform/graphics/Image.h" 35 36 namespace WebCore { 37 38 // StylePendingImage is a placeholder StyleImage that is entered into the RenderStyle during 39 // style resolution, in order to avoid loading images that are not referenced by the final style. 40 // They should never exist in a RenderStyle after it has been returned from the style selector. 41 42 class StylePendingImage : public StyleImage { 43 public: 44 static PassRefPtr<StylePendingImage> create(CSSValue* value) { return adoptRef(new StylePendingImage(value)); } 45 46 virtual WrappedImagePtr data() const { return m_value; } 47 48 virtual PassRefPtr<CSSValue> cssValue() const { return m_value; } 49 CSSImageValue* cssImageValue() const { return m_value->isImageValue() ? toCSSImageValue(m_value) : 0; } 50 CSSImageGeneratorValue* cssImageGeneratorValue() const { return m_value->isImageGeneratorValue() ? toCSSImageGeneratorValue(m_value) : 0; } 51 CSSCursorImageValue* cssCursorImageValue() const { return m_value->isCursorImageValue() ? toCSSCursorImageValue(m_value) : 0; } 52 CSSImageSetValue* cssImageSetValue() const { return m_value->isImageSetValue() ? toCSSImageSetValue(m_value) : 0; } 53 54 virtual LayoutSize imageSize(const RenderObject*, float /*multiplier*/) const OVERRIDE { return LayoutSize(); } 55 virtual bool imageHasRelativeWidth() const { return false; } 56 virtual bool imageHasRelativeHeight() const { return false; } 57 virtual void computeIntrinsicDimensions(const RenderObject*, Length& /* intrinsicWidth */ , Length& /* intrinsicHeight */, FloatSize& /* intrinsicRatio */) { } 58 virtual bool usesImageContainerSize() const { return false; } 59 virtual void setContainerSizeForRenderer(const RenderObject*, const IntSize&, float) { } 60 virtual void addClient(RenderObject*) { } 61 virtual void removeClient(RenderObject*) { } 62 virtual PassRefPtr<Image> image(RenderObject*, const IntSize&) const 63 { 64 ASSERT_NOT_REACHED(); 65 return 0; 66 } 67 virtual bool knownToBeOpaque(const RenderObject*) const { return false; } 68 69 private: 70 StylePendingImage(CSSValue* value) 71 : m_value(value) 72 { 73 m_isPendingImage = true; 74 } 75 76 CSSValue* m_value; // Not retained; it owns us. 77 }; 78 79 DEFINE_STYLE_IMAGE_TYPE_CASTS(StylePendingImage, isPendingImage()); 80 81 } 82 #endif 83
