1/*
2 * Copyright (C) 2007-2017 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 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 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 "CSSFontFaceSrcValue.h"
28#include "CachedFont.h"
29#include "CachedResourceLoader.h"
30#include "CachedResourceRequest.h"
31#include "CachedResourceRequestInitiators.h"
32#include "Document.h"
33#include "FontCustomPlatformData.h"
34#include "Node.h"
35#include "SVGFontFaceElement.h"
36#include <wtf/text/StringBuilder.h>
37
38namespace WebCore {
39
40#if ENABLE(SVG_FONTS)
41bool CSSFontFaceSrcValue::isSVGFontFaceSrc() const
42{
43 return equalLettersIgnoringASCIICase(m_format, "svg");
44}
45
46bool CSSFontFaceSrcValue::isSVGFontTarget() const
47{
48 return isSVGFontFaceSrc() || svgFontFaceElement();
49}
50#endif
51
52bool CSSFontFaceSrcValue::isSupportedFormat() const
53{
54 // Normally we would just check the format, but in order to avoid conflicts with the old WinIE style of font-face,
55 // we will also check to see if the URL ends with .eot. If so, we'll assume that we shouldn't load it.
56 if (m_format.isEmpty()) {
57 // Check for .eot.
58 if (!protocolIs(m_resource, "data") && m_resource.endsWithIgnoringASCIICase(".eot"))
59 return false;
60 return true;
61 }
62
63 return FontCustomPlatformData::supportsFormat(m_format)
64#if ENABLE(SVG_FONTS)
65 || isSVGFontFaceSrc()
66#endif
67 ;
68}
69
70String CSSFontFaceSrcValue::customCSSText() const
71{
72 StringBuilder result;
73 if (isLocal())
74 result.appendLiteral("local(");
75 else
76 result.appendLiteral("url(");
77 result.append(m_resource);
78 result.append(')');
79 if (!m_format.isEmpty()) {
80 result.appendLiteral(" format(");
81 result.append(m_format);
82 result.append(')');
83 }
84 return result.toString();
85}
86
87bool CSSFontFaceSrcValue::traverseSubresources(const WTF::Function<bool (const CachedResource&)>& handler) const
88{
89 if (!m_cachedFont)
90 return false;
91 return handler(*m_cachedFont);
92}
93
94CachedFont* CSSFontFaceSrcValue::cachedFont(Document* document, bool isSVG, bool isInitiatingElementInUserAgentShadowTree)
95{
96 if (m_cachedFont)
97 return m_cachedFont.get();
98
99 ResourceLoaderOptions options = CachedResourceLoader::defaultCachedResourceOptions();
100 options.contentSecurityPolicyImposition = isInitiatingElementInUserAgentShadowTree ? ContentSecurityPolicyImposition::SkipPolicyCheck : ContentSecurityPolicyImposition::DoPolicyCheck;
101 options.loadedFromOpaqueSource = m_loadedFromOpaqueSource;
102
103 CachedResourceRequest request(ResourceRequest(document->completeURL(m_resource)), options);
104 request.setInitiator(cachedResourceRequestInitiators().css);
105 m_cachedFont = document->cachedResourceLoader().requestFont(WTFMove(request), isSVG).value_or(nullptr);
106 return m_cachedFont.get();
107}
108
109bool CSSFontFaceSrcValue::equals(const CSSFontFaceSrcValue& other) const
110{
111 return m_isLocal == other.m_isLocal && m_format == other.m_format && m_resource == other.m_resource;
112}
113
114}
115