1 /*
2 * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
3 * Copyright (C) 2012 Apple Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above
10 * copyright notice, this list of conditions and the following
11 * disclaimer.
12 * 2. Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials
15 * provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
26 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
27 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #ifndef CSSParserMode_h
32 #define CSSParserMode_h
33
34 #include "platform/weborigin/KURL.h"
35
36 namespace WebCore {
37
38 class Document;
39
40 // Must not grow beyond 3 bytes, due to packing in StylePropertySet.
41 enum CSSParserMode {
42 HTMLStandardMode,
43 HTMLQuirksMode,
44 // HTML attributes are parsed in quirks mode but also allows internal properties and values.
45 HTMLAttributeMode,
46 // SVG attributes are parsed in quirks mode but rules differ slightly.
47 SVGAttributeMode,
48 // @viewport rules are parsed in standards mode but CSSOM modifications (via StylePropertySet)
49 // must call parseViewportProperties so needs a special mode.
50 CSSViewportRuleMode,
51 // User agent stylesheets are parsed in standards mode but also allows internal properties and values.
52 UASheetMode
53 };
54
isQuirksModeBehavior(CSSParserMode mode)55 inline bool isQuirksModeBehavior(CSSParserMode mode)
56 {
57 return mode == HTMLQuirksMode; // || mode == HTMLAttributeMode;
58 }
59
isUASheetBehavior(CSSParserMode mode)60 inline bool isUASheetBehavior(CSSParserMode mode)
61 {
62 return mode == UASheetMode;
63 }
64
isInternalPropertyAndValueParsingEnabledForMode(CSSParserMode mode)65 inline bool isInternalPropertyAndValueParsingEnabledForMode(CSSParserMode mode)
66 {
67 return mode == HTMLAttributeMode || mode == UASheetMode;
68 }
69
isUnitLessLengthParsingEnabledForMode(CSSParserMode mode)70 inline bool isUnitLessLengthParsingEnabledForMode(CSSParserMode mode)
71 {
72 return mode == HTMLQuirksMode || mode == HTMLAttributeMode || mode == SVGAttributeMode;
73 }
74
isCSSViewportParsingEnabledForMode(CSSParserMode mode)75 inline bool isCSSViewportParsingEnabledForMode(CSSParserMode mode)
76 {
77 return mode == CSSViewportRuleMode;
78 }
79
isSVGNumberParsingEnabledForMode(CSSParserMode mode)80 inline bool isSVGNumberParsingEnabledForMode(CSSParserMode mode)
81 {
82 return mode == SVGAttributeMode;
83 }
84
isUseCounterEnabledForMode(CSSParserMode mode)85 inline bool isUseCounterEnabledForMode(CSSParserMode mode)
86 {
87 // We don't count the UA style sheet in our statistics.
88 return mode != UASheetMode;
89 }
90
91 class CSSParserContext {
92 WTF_MAKE_FAST_ALLOCATED;
93 public:
94 CSSParserContext(CSSParserMode);
95 CSSParserContext(const Document&, const KURL& baseURL = KURL(), const String& charset = emptyString());
96
97 bool operator==(const CSSParserContext&) const;
98 bool operator!=(const CSSParserContext& other) const { return !(*this == other); }
99
mode()100 CSSParserMode mode() const { return m_mode; }
baseURL()101 const KURL& baseURL() const { return m_baseURL; }
charset()102 const String& charset() const { return m_charset; }
isHTMLDocument()103 bool isHTMLDocument() const { return m_isHTMLDocument; }
104
105 // This quirk is to maintain compatibility with Android apps built on
106 // the Android SDK prior to and including version 18. Presumably, this
107 // can be removed any time after 2015. See http://crbug.com/277157.
useLegacyBackgroundSizeShorthandBehavior()108 bool useLegacyBackgroundSizeShorthandBehavior() const { return m_useLegacyBackgroundSizeShorthandBehavior; }
109
110 // FIXME: These setters shouldn't exist, however the current lifetime of CSSParserContext
111 // is not well understood and thus we sometimes need to override these fields.
setMode(CSSParserMode mode)112 void setMode(CSSParserMode mode) { m_mode = mode; }
setBaseURL(const KURL & baseURL)113 void setBaseURL(const KURL& baseURL) { m_baseURL = baseURL; }
setCharset(const String & charset)114 void setCharset(const String& charset) { m_charset = charset; }
115
116 private:
117 KURL m_baseURL;
118 String m_charset;
119 CSSParserMode m_mode;
120 bool m_isHTMLDocument;
121 bool m_useLegacyBackgroundSizeShorthandBehavior;
122 };
123
124 const CSSParserContext& strictCSSParserContext();
125
126 };
127
128 #endif // CSSParserMode_h
129