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
32namespace WebCore {
33
34CSSCanvasValue::~CSSCanvasValue()
35{
36    if (m_element)
37        m_element->removeObserver(&m_canvasObserver);
38}
39
40String 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
49void 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
57void 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
64void CSSCanvasValue::canvasDestroyed(HTMLCanvasElement* element)
65{
66    ASSERT_UNUSED(element, element == m_element);
67    m_element = 0;
68}
69
70IntSize 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
77HTMLCanvasElement* 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
88PassRefPtr<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
97bool CSSCanvasValue::equals(const CSSCanvasValue& other) const
98{
99    return m_name == other.m_name;
100}
101
102} // namespace WebCore
103