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