1/* 2 * (C) 1999-2003 Lars Knoll (knoll@kde.org) 3 * Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved. 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public License 16 * along with this library; see the file COPYING.LIB. If not, write to 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 */ 20 21#include "config.h" 22#include "CSSImageValue.h" 23 24#include "CSSValueKeywords.h" 25#include "MemoryCache.h" 26#include "CachedImage.h" 27#include "CachedResourceLoader.h" 28#include "StyleCachedImage.h" 29#include "StylePendingImage.h" 30 31namespace WebCore { 32 33CSSImageValue::CSSImageValue(const String& url) 34 : CSSPrimitiveValue(url, CSS_URI) 35 , m_accessedImage(false) 36{ 37} 38 39CSSImageValue::CSSImageValue() 40 : CSSPrimitiveValue(CSSValueNone) 41 , m_accessedImage(true) 42{ 43} 44 45CSSImageValue::~CSSImageValue() 46{ 47 if (m_image && m_image->isCachedImage()) 48 static_cast<StyleCachedImage*>(m_image.get())->cachedImage()->removeClient(this); 49} 50 51StyleImage* CSSImageValue::cachedOrPendingImage() 52{ 53 if (getIdent() == CSSValueNone) 54 return 0; 55 56 if (!m_image) 57 m_image = StylePendingImage::create(this); 58 59 return m_image.get(); 60} 61 62StyleCachedImage* CSSImageValue::cachedImage(CachedResourceLoader* loader) 63{ 64 return cachedImage(loader, getStringValue()); 65} 66 67StyleCachedImage* CSSImageValue::cachedImage(CachedResourceLoader* loader, const String& url) 68{ 69 ASSERT(loader); 70 71 if (!m_accessedImage) { 72 m_accessedImage = true; 73 74 if (CachedImage* cachedImage = loader->requestImage(url)) { 75 cachedImage->addClient(this); 76 m_image = StyleCachedImage::create(cachedImage); 77 } 78 } 79 80 return (m_image && m_image->isCachedImage()) ? static_cast<StyleCachedImage*>(m_image.get()) : 0; 81} 82 83String CSSImageValue::cachedImageURL() 84{ 85 if (!m_image || !m_image->isCachedImage()) 86 return String(); 87 return static_cast<StyleCachedImage*>(m_image.get())->cachedImage()->url(); 88} 89 90void CSSImageValue::clearCachedImage() 91{ 92 if (m_image && m_image->isCachedImage()) 93 static_cast<StyleCachedImage*>(m_image.get())->cachedImage()->removeClient(this); 94 m_image = 0; 95 m_accessedImage = false; 96} 97 98} // namespace WebCore 99