1 /*
2 * (C) 1999-2003 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21 #include "config.h"
22 #include "CSSImageValue.h"
23
24 #include "CSSValueKeywords.h"
25 #include "MemoryCache.h"
26 #include "CachedImage.h"
27 #include "CachedResourceLoader.h"
28 #include "StyleCachedImage.h"
29 #include "StylePendingImage.h"
30
31 namespace WebCore {
32
CSSImageValue(const String & url)33 CSSImageValue::CSSImageValue(const String& url)
34 : CSSPrimitiveValue(url, CSS_URI)
35 , m_accessedImage(false)
36 {
37 }
38
CSSImageValue()39 CSSImageValue::CSSImageValue()
40 : CSSPrimitiveValue(CSSValueNone)
41 , m_accessedImage(true)
42 {
43 }
44
~CSSImageValue()45 CSSImageValue::~CSSImageValue()
46 {
47 if (m_image && m_image->isCachedImage())
48 static_cast<StyleCachedImage*>(m_image.get())->cachedImage()->removeClient(this);
49 }
50
cachedOrPendingImage()51 StyleImage* CSSImageValue::cachedOrPendingImage()
52 {
53 if (getIdent() == CSSValueNone)
54 return 0;
55
56 if (!m_image)
57 m_image = StylePendingImage::create(this);
58
59 return m_image.get();
60 }
61
cachedImage(CachedResourceLoader * loader)62 StyleCachedImage* CSSImageValue::cachedImage(CachedResourceLoader* loader)
63 {
64 return cachedImage(loader, getStringValue());
65 }
66
cachedImage(CachedResourceLoader * loader,const String & url)67 StyleCachedImage* CSSImageValue::cachedImage(CachedResourceLoader* loader, const String& url)
68 {
69 ASSERT(loader);
70
71 if (!m_accessedImage) {
72 m_accessedImage = true;
73
74 if (CachedImage* cachedImage = loader->requestImage(url)) {
75 cachedImage->addClient(this);
76 m_image = StyleCachedImage::create(cachedImage);
77 }
78 }
79
80 return (m_image && m_image->isCachedImage()) ? static_cast<StyleCachedImage*>(m_image.get()) : 0;
81 }
82
cachedImageURL()83 String CSSImageValue::cachedImageURL()
84 {
85 if (!m_image || !m_image->isCachedImage())
86 return String();
87 return static_cast<StyleCachedImage*>(m_image.get())->cachedImage()->url();
88 }
89
clearCachedImage()90 void CSSImageValue::clearCachedImage()
91 {
92 if (m_image && m_image->isCachedImage())
93 static_cast<StyleCachedImage*>(m_image.get())->cachedImage()->removeClient(this);
94 m_image = 0;
95 m_accessedImage = false;
96 }
97
98 } // namespace WebCore
99