1 /* 2 * Copyright (C) 2008 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 COMPUTER, 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 #include "config.h" 27 #include "CSSImageGeneratorValue.h" 28 29 #include "Image.h" 30 #include "IntSize.h" 31 #include "IntSizeHash.h" 32 #include "PlatformString.h" 33 #include "RenderObject.h" 34 #include "StyleGeneratedImage.h" 35 36 namespace WebCore { 37 38 CSSImageGeneratorValue::CSSImageGeneratorValue() 39 : m_accessedImage(false) 40 { 41 } 42 43 CSSImageGeneratorValue::~CSSImageGeneratorValue() 44 { 45 } 46 47 void CSSImageGeneratorValue::addClient(RenderObject* renderer, const IntSize& size) 48 { 49 ref(); 50 if (!size.isEmpty()) 51 m_sizes.add(size); 52 53 RenderObjectSizeCountMap::iterator it = m_clients.find(renderer); 54 if (it == m_clients.end()) 55 m_clients.add(renderer, SizeCountPair(size, 1)); 56 else { 57 SizeCountPair& sizeCount = it->second; 58 ++sizeCount.second; 59 } 60 } 61 62 void CSSImageGeneratorValue::removeClient(RenderObject* renderer) 63 { 64 RenderObjectSizeCountMap::iterator it = m_clients.find(renderer); 65 ASSERT(it != m_clients.end()); 66 67 SizeCountPair& sizeCount = it->second; 68 IntSize size = sizeCount.first; 69 if (!size.isEmpty()) { 70 m_sizes.remove(size); 71 if (!m_sizes.contains(size)) 72 m_images.remove(size); 73 } 74 75 if (!--sizeCount.second) 76 m_clients.remove(renderer); 77 78 deref(); 79 } 80 81 Image* CSSImageGeneratorValue::getImage(RenderObject* renderer, const IntSize& size) 82 { 83 RenderObjectSizeCountMap::iterator it = m_clients.find(renderer); 84 ASSERT(it != m_clients.end()); 85 86 SizeCountPair& sizeCount = it->second; 87 IntSize oldSize = sizeCount.first; 88 if (oldSize != size) { 89 removeClient(renderer); 90 addClient(renderer, size); 91 } 92 93 // Don't generate an image for empty sizes. 94 if (size.isEmpty()) 95 return 0; 96 97 // Look up the image in our cache. 98 return m_images.get(size).get(); 99 } 100 101 void CSSImageGeneratorValue::putImage(const IntSize& size, PassRefPtr<Image> image) 102 { 103 m_images.add(size, image); 104 } 105 106 StyleGeneratedImage* CSSImageGeneratorValue::generatedImage() 107 { 108 if (!m_accessedImage) { 109 m_accessedImage = true; 110 m_image = StyleGeneratedImage::create(this, isFixedSize()); 111 } 112 return m_image.get(); 113 } 114 115 } // namespace WebCore 116