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 "CSSCursorImageValue.h" 30#include "CSSImageGeneratorValue.h" 31#if ENABLE(CSS_IMAGE_SET) 32#include "CSSImageSetValue.h" 33#endif 34#include "CSSImageValue.h" 35#include "StyleImage.h" 36 37namespace WebCore { 38 39// StylePendingImage is a placeholder StyleImage that is entered into the RenderStyle during 40// style resolution, in order to avoid loading images that are not referenced by the final style. 41// They should never exist in a RenderStyle after it has been returned from the style selector. 42 43class StylePendingImage : public StyleImage { 44public: 45 static PassRefPtr<StylePendingImage> create(CSSValue* value) { return adoptRef(new StylePendingImage(value)); } 46 47 virtual WrappedImagePtr data() const { return static_cast<CSSImageValue*>(m_value); } 48 49 virtual PassRefPtr<CSSValue> cssValue() const { return m_value; } 50 CSSImageValue* cssImageValue() const { return m_value && m_value->isImageValue() ? static_cast<CSSImageValue*>(m_value) : nullptr; } 51 CSSImageGeneratorValue* cssImageGeneratorValue() const { return m_value && m_value->isImageGeneratorValue() ? static_cast<CSSImageGeneratorValue*>(m_value) : nullptr; } 52 CSSCursorImageValue* cssCursorImageValue() const { return m_value && m_value->isCursorImageValue() ? static_cast<CSSCursorImageValue*>(m_value) : nullptr; } 53#if ENABLE(CSS_IMAGE_SET) 54 CSSImageSetValue* cssImageSetValue() const { return m_value && m_value->isImageSetValue() ? static_cast<CSSImageSetValue*>(m_value) : nullptr; } 55#endif 56 57 void detachFromCSSValue() { m_value = nullptr; } 58 59 virtual LayoutSize imageSize(const RenderObject*, float /*multiplier*/) const OVERRIDE { return LayoutSize(); } 60 virtual bool imageHasRelativeWidth() const { return false; } 61 virtual bool imageHasRelativeHeight() const { return false; } 62 virtual void computeIntrinsicDimensions(const RenderObject*, Length& /* intrinsicWidth */ , Length& /* intrinsicHeight */, FloatSize& /* intrinsicRatio */) { } 63 virtual bool usesImageContainerSize() const { return false; } 64 virtual void setContainerSizeForRenderer(const RenderObject*, const IntSize&, float) { } 65 virtual void addClient(RenderObject*) { } 66 virtual void removeClient(RenderObject*) { } 67 virtual PassRefPtr<Image> image(RenderObject*, const IntSize&) const 68 { 69 ASSERT_NOT_REACHED(); 70 return 0; 71 } 72 virtual bool knownToBeOpaque(const RenderObject*) const { return false; } 73 74private: 75 StylePendingImage(CSSValue* value) 76 : m_value(value) 77 { 78 m_isPendingImage = true; 79 } 80 81 CSSValue* m_value; // Not retained; it owns us. 82}; 83 84} 85 86#endif 87