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 "core/css/CSSCanvasValue.h" 28 29 #include "core/rendering/RenderObject.h" 30 #include "wtf/text/StringBuilder.h" 31 32 namespace WebCore { 33 34 CSSCanvasValue::~CSSCanvasValue() 35 { 36 if (m_element) 37 m_element->removeObserver(&m_canvasObserver); 38 } 39 40 String CSSCanvasValue::customCssText() const 41 { 42 StringBuilder result; 43 result.appendLiteral("-webkit-canvas("); 44 result.append(m_name); 45 result.append(')'); 46 return result.toString(); 47 } 48 49 void CSSCanvasValue::canvasChanged(HTMLCanvasElement*, const FloatRect& changedRect) 50 { 51 IntRect imageChangeRect = enclosingIntRect(changedRect); 52 RenderObjectSizeCountMap::const_iterator end = clients().end(); 53 for (RenderObjectSizeCountMap::const_iterator curr = clients().begin(); curr != end; ++curr) 54 const_cast<RenderObject*>(curr->key)->imageChanged(static_cast<WrappedImagePtr>(this), &imageChangeRect); 55 } 56 57 void CSSCanvasValue::canvasResized(HTMLCanvasElement*) 58 { 59 RenderObjectSizeCountMap::const_iterator end = clients().end(); 60 for (RenderObjectSizeCountMap::const_iterator curr = clients().begin(); curr != end; ++curr) 61 const_cast<RenderObject*>(curr->key)->imageChanged(static_cast<WrappedImagePtr>(this)); 62 } 63 64 void CSSCanvasValue::canvasDestroyed(HTMLCanvasElement* element) 65 { 66 ASSERT_UNUSED(element, element == m_element); 67 m_element = 0; 68 } 69 70 IntSize CSSCanvasValue::fixedSize(const RenderObject* renderer) 71 { 72 if (HTMLCanvasElement* elt = element(renderer->document())) 73 return IntSize(elt->width(), elt->height()); 74 return IntSize(); 75 } 76 77 HTMLCanvasElement* CSSCanvasValue::element(Document* document) 78 { 79 if (!m_element) { 80 m_element = document->getCSSCanvasElement(m_name); 81 if (!m_element) 82 return 0; 83 m_element->addObserver(&m_canvasObserver); 84 } 85 return m_element; 86 } 87 88 PassRefPtr<Image> CSSCanvasValue::image(RenderObject* renderer, const IntSize& /*size*/) 89 { 90 ASSERT(clients().contains(renderer)); 91 HTMLCanvasElement* elt = element(renderer->document()); 92 if (!elt || !elt->buffer()) 93 return 0; 94 return elt->copiedImage(); 95 } 96 97 bool CSSCanvasValue::equals(const CSSCanvasValue& other) const 98 { 99 return m_name == other.m_name; 100 } 101 102 } // namespace WebCore 103