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
CSSImageGeneratorValue()38 CSSImageGeneratorValue::CSSImageGeneratorValue()
39 : m_accessedImage(false)
40 {
41 }
42
~CSSImageGeneratorValue()43 CSSImageGeneratorValue::~CSSImageGeneratorValue()
44 {
45 }
46
addClient(RenderObject * renderer,const IntSize & size)47 void CSSImageGeneratorValue::addClient(RenderObject* renderer, const IntSize& size)
48 {
49 ref();
50 if (!size.isEmpty())
51 m_sizes.add(size);
52 m_clients.add(renderer, size);
53 }
54
removeClient(RenderObject * renderer)55 void CSSImageGeneratorValue::removeClient(RenderObject* renderer)
56 {
57 IntSize size = m_clients.get(renderer);
58 if (!size.isEmpty()) {
59 m_sizes.remove(size);
60 if (!m_sizes.contains(size))
61 m_images.remove(size);
62 }
63 m_clients.remove(renderer);
64 deref();
65 }
66
getImage(RenderObject * renderer,const IntSize & size)67 Image* CSSImageGeneratorValue::getImage(RenderObject* renderer, const IntSize& size)
68 {
69 IntSize oldSize = m_clients.get(renderer);
70 if (oldSize != size) {
71 removeClient(renderer);
72 addClient(renderer, size);
73 }
74
75 // Don't generate an image for empty sizes.
76 if (size.isEmpty())
77 return 0;
78
79 // Look up the image in our cache.
80 return m_images.get(size).get();
81 }
82
putImage(const IntSize & size,PassRefPtr<Image> image)83 void CSSImageGeneratorValue::putImage(const IntSize& size, PassRefPtr<Image> image)
84 {
85 m_images.add(size, image);
86 }
87
generatedImage()88 StyleGeneratedImage* CSSImageGeneratorValue::generatedImage()
89 {
90 if (!m_accessedImage) {
91 m_accessedImage = true;
92 m_image = StyleGeneratedImage::create(this, isFixedSize());
93 }
94 return m_image.get();
95 }
96
97 } // namespace WebCore
98