1 /*
2 * Copyright (C) 2007, 2010 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/CSSFontFaceSrcValue.h"
28
29 #include "core/FetchInitiatorTypeNames.h"
30 #include "core/css/StyleSheetContents.h"
31 #include "core/dom/Document.h"
32 #include "core/dom/Node.h"
33 #include "core/fetch/FetchRequest.h"
34 #include "core/fetch/FontResource.h"
35 #include "core/fetch/ResourceFetcher.h"
36 #include "core/svg/SVGFontFaceElement.h"
37 #include "platform/fonts/FontCustomPlatformData.h"
38 #include "wtf/text/StringBuilder.h"
39
40 namespace WebCore {
41
42 #if ENABLE(SVG_FONTS)
isSVGFontFaceSrc() const43 bool CSSFontFaceSrcValue::isSVGFontFaceSrc() const
44 {
45 return equalIgnoringCase(m_format, "svg");
46 }
47 #endif
48
isSupportedFormat() const49 bool CSSFontFaceSrcValue::isSupportedFormat() const
50 {
51 // Normally we would just check the format, but in order to avoid conflicts with the old WinIE style of font-face,
52 // we will also check to see if the URL ends with .eot. If so, we'll go ahead and assume that we shouldn't load it.
53 if (m_format.isEmpty()) {
54 // Check for .eot.
55 if (!m_resource.startsWith("data:", false) && m_resource.endsWith(".eot", false))
56 return false;
57 return true;
58 }
59
60 return FontCustomPlatformData::supportsFormat(m_format)
61 #if ENABLE(SVG_FONTS)
62 || isSVGFontFaceSrc()
63 #endif
64 ;
65 }
66
customCSSText() const67 String CSSFontFaceSrcValue::customCSSText() const
68 {
69 StringBuilder result;
70 if (isLocal())
71 result.appendLiteral("local(");
72 else
73 result.appendLiteral("url(");
74 result.append(m_resource);
75 result.append(')');
76 if (!m_format.isEmpty()) {
77 result.appendLiteral(" format(");
78 result.append(m_format);
79 result.append(')');
80 }
81 return result.toString();
82 }
83
hasFailedOrCanceledSubresources() const84 bool CSSFontFaceSrcValue::hasFailedOrCanceledSubresources() const
85 {
86 if (!m_fetched)
87 return false;
88 return m_fetched->loadFailedOrCanceled();
89 }
90
shouldSetCrossOriginAccessControl(const KURL & resource,SecurityOrigin * securityOrigin)91 bool CSSFontFaceSrcValue::shouldSetCrossOriginAccessControl(const KURL& resource, SecurityOrigin* securityOrigin)
92 {
93 if (resource.isLocalFile() || resource.protocolIsData())
94 return false;
95 return !securityOrigin->canRequest(resource);
96 }
97
fetch(Document * document)98 FontResource* CSSFontFaceSrcValue::fetch(Document* document)
99 {
100 if (!m_fetched) {
101 FetchRequest request(ResourceRequest(document->completeURL(m_resource)), FetchInitiatorTypeNames::css);
102 SecurityOrigin* securityOrigin = document->securityOrigin();
103 if (shouldSetCrossOriginAccessControl(request.url(), securityOrigin)) {
104 request.setCrossOriginAccessControl(securityOrigin, DoNotAllowStoredCredentials);
105 }
106 request.mutableResourceRequest().setHTTPReferrer(m_referrer);
107 m_fetched = document->fetcher()->fetchFont(request);
108 } else {
109 // FIXME: CSSFontFaceSrcValue::fetch is invoked when @font-face rule
110 // is processed by StyleResolver / StyleEngine.
111 restoreCachedResourceIfNeeded(document);
112 }
113 return m_fetched.get();
114 }
115
restoreCachedResourceIfNeeded(Document * document)116 void CSSFontFaceSrcValue::restoreCachedResourceIfNeeded(Document* document)
117 {
118 ASSERT(m_fetched);
119 ASSERT(document && document->fetcher());
120
121 const String resourceURL = document->completeURL(m_resource);
122 if (document->fetcher()->cachedResource(KURL(ParsedURLString, resourceURL)))
123 return;
124
125 FetchRequest request(ResourceRequest(resourceURL), FetchInitiatorTypeNames::css);
126 document->fetcher()->requestLoadStarted(m_fetched.get(), request, ResourceFetcher::ResourceLoadingFromCache);
127 }
128
equals(const CSSFontFaceSrcValue & other) const129 bool CSSFontFaceSrcValue::equals(const CSSFontFaceSrcValue& other) const
130 {
131 return m_isLocal == other.m_isLocal && m_format == other.m_format && m_resource == other.m_resource;
132 }
133
134 }
135