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 "core/css/CSSImageValue.h"
23
24 #include "core/FetchInitiatorTypeNames.h"
25 #include "core/css/CSSMarkup.h"
26 #include "core/dom/Document.h"
27 #include "core/fetch/CrossOriginAccessControl.h"
28 #include "core/fetch/FetchRequest.h"
29 #include "core/fetch/ImageResource.h"
30 #include "core/rendering/style/StyleFetchedImage.h"
31 #include "core/rendering/style/StylePendingImage.h"
32 #include "platform/weborigin/KURL.h"
33
34 namespace blink {
35
CSSImageValue(const String & rawValue,const KURL & url,StyleImage * image)36 CSSImageValue::CSSImageValue(const String& rawValue, const KURL& url, StyleImage* image)
37 : CSSValue(ImageClass)
38 , m_relativeURL(rawValue)
39 , m_absoluteURL(url.string())
40 , m_image(image)
41 , m_accessedImage(image)
42 {
43 }
44
~CSSImageValue()45 CSSImageValue::~CSSImageValue()
46 {
47 }
48
cachedOrPendingImage()49 StyleImage* CSSImageValue::cachedOrPendingImage()
50 {
51 if (!m_image)
52 m_image = StylePendingImage::create(this);
53
54 return m_image.get();
55 }
56
cachedImage(ResourceFetcher * fetcher,const ResourceLoaderOptions & options)57 StyleFetchedImage* CSSImageValue::cachedImage(ResourceFetcher* fetcher, const ResourceLoaderOptions& options)
58 {
59 ASSERT(fetcher);
60
61 if (!m_accessedImage) {
62 m_accessedImage = true;
63
64 FetchRequest request(ResourceRequest(m_absoluteURL), m_initiatorName.isEmpty() ? FetchInitiatorTypeNames::css : m_initiatorName, options);
65 request.mutableResourceRequest().setHTTPReferrer(m_referrer);
66
67 if (options.corsEnabled == IsCORSEnabled)
68 request.setCrossOriginAccessControl(fetcher->document()->securityOrigin(), options.allowCredentials, options.credentialsRequested);
69
70 if (ResourcePtr<ImageResource> cachedImage = fetcher->fetchImage(request))
71 m_image = StyleFetchedImage::create(cachedImage.get());
72 }
73
74 return (m_image && m_image->isImageResource()) ? toStyleFetchedImage(m_image) : 0;
75 }
76
restoreCachedResourceIfNeeded(Document & document)77 void CSSImageValue::restoreCachedResourceIfNeeded(Document& document)
78 {
79 if (!m_accessedImage || !m_image->isImageResource() || !document.fetcher())
80 return;
81 if (document.fetcher()->cachedResource(KURL(ParsedURLString, m_absoluteURL)))
82 return;
83
84 ImageResource* resource = m_image->cachedImage();
85 if (!resource)
86 return;
87
88 FetchRequest request(ResourceRequest(m_absoluteURL), m_initiatorName.isEmpty() ? FetchInitiatorTypeNames::css : m_initiatorName, resource->options());
89 document.fetcher()->requestLoadStarted(resource, request, ResourceFetcher::ResourceLoadingFromCache);
90 }
91
hasFailedOrCanceledSubresources() const92 bool CSSImageValue::hasFailedOrCanceledSubresources() const
93 {
94 if (!m_image || !m_image->isImageResource())
95 return false;
96 if (Resource* cachedResource = toStyleFetchedImage(m_image)->cachedImage())
97 return cachedResource->loadFailedOrCanceled();
98 return true;
99 }
100
equals(const CSSImageValue & other) const101 bool CSSImageValue::equals(const CSSImageValue& other) const
102 {
103 return m_absoluteURL == other.m_absoluteURL;
104 }
105
customCSSText() const106 String CSSImageValue::customCSSText() const
107 {
108 return "url(" + quoteCSSURLIfNeeded(m_absoluteURL) + ")";
109 }
110
cloneForCSSOM() const111 PassRefPtrWillBeRawPtr<CSSValue> CSSImageValue::cloneForCSSOM() const
112 {
113 // NOTE: We expose CSSImageValues as URI primitive values in CSSOM to maintain old behavior.
114 RefPtrWillBeRawPtr<CSSPrimitiveValue> uriValue = CSSPrimitiveValue::create(m_absoluteURL, CSSPrimitiveValue::CSS_URI);
115 uriValue->setCSSOMSafe();
116 return uriValue.release();
117 }
118
knownToBeOpaque(const RenderObject * renderer) const119 bool CSSImageValue::knownToBeOpaque(const RenderObject* renderer) const
120 {
121 return m_image ? m_image->knownToBeOpaque(renderer) : false;
122 }
123
traceAfterDispatch(Visitor * visitor)124 void CSSImageValue::traceAfterDispatch(Visitor* visitor)
125 {
126 CSSValue::traceAfterDispatch(visitor);
127 }
128
reResolveURL(const Document & document)129 void CSSImageValue::reResolveURL(const Document& document)
130 {
131 KURL url = document.completeURL(m_relativeURL);
132 if (url == m_absoluteURL)
133 return;
134 m_absoluteURL = url.string();
135 m_accessedImage = false;
136 m_image.clear();
137 }
138
139 } // namespace blink
140