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 "Image.h" 30#include "StyleImage.h" 31 32namespace WebCore { 33 34// StylePendingImage is a placeholder StyleImage that is entered into the RenderStyle during 35// style resolution, in order to avoid loading images that are not referenced by the final style. 36// They should never exist in a RenderStyle after it has been returned from the style selector. 37 38class StylePendingImage : public StyleImage { 39public: 40 static PassRefPtr<StylePendingImage> create(CSSImageValue* value) { return adoptRef(new StylePendingImage(value)); } 41 42 virtual WrappedImagePtr data() const { return m_value; } 43 44 virtual bool isPendingImage() const { return true; } 45 46 virtual PassRefPtr<CSSValue> cssValue() const { return m_value; } 47 CSSImageValue* cssImageValue() const { return m_value; } 48 49 virtual IntSize imageSize(const RenderObject*, float /*multiplier*/) const { return IntSize(); } 50 virtual bool imageHasRelativeWidth() const { return false; } 51 virtual bool imageHasRelativeHeight() const { return false; } 52 virtual bool usesImageContainerSize() const { return false; } 53 virtual void setImageContainerSize(const IntSize&) { } 54 virtual void addClient(RenderObject*) { } 55 virtual void removeClient(RenderObject*) { } 56 virtual PassRefPtr<Image> image(RenderObject*, const IntSize&) const 57 { 58 ASSERT_NOT_REACHED(); 59 return 0; 60 } 61 62private: 63 StylePendingImage(CSSImageValue* value) 64 : m_value(value) 65 { 66 } 67 68 CSSImageValue* m_value; // Not retained; it owns us. 69}; 70 71} 72#endif 73