4 * Copyright (C) 2005, 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
5 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
20 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
24 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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30 #include "core/css/MediaQuery.h"
32 #include "core/MediaTypeNames.h"
33 #include "core/css/MediaQueryExp.h"
34 #include "core/html/parser/HTMLParserIdioms.h"
35 #include "wtf/NonCopyingSort.h"
36 #include "wtf/text/StringBuilder.h"
40 // http://dev.w3.org/csswg/cssom/#serialize-a-media-query
41 String MediaQuery::serialize() const
44 switch (m_restrictor) {
45 case MediaQuery::Only:
46 result.append("only ");
49 result.append("not ");
51 case MediaQuery::None:
55 if (m_expressions->isEmpty()) {
56 result.append(m_mediaType);
57 return result.toString();
60 if (m_mediaType != MediaTypeNames::all || m_restrictor != None) {
61 result.append(m_mediaType);
62 result.append(" and ");
65 result.append(m_expressions->at(0)->serialize());
66 for (size_t i = 1; i < m_expressions->size(); ++i) {
67 result.append(" and ");
68 result.append(m_expressions->at(i)->serialize());
70 return result.toString();
73 static bool expressionCompare(const OwnPtrWillBeMember<MediaQueryExp>& a, const OwnPtrWillBeMember<MediaQueryExp>& b)
75 return codePointCompare(a->serialize(), b->serialize()) < 0;
78 PassOwnPtrWillBeRawPtr<MediaQuery> MediaQuery::createNotAll()
80 return adoptPtrWillBeNoop(new MediaQuery(MediaQuery::Not, MediaTypeNames::all, nullptr));
83 MediaQuery::MediaQuery(Restrictor r, const String& mediaType, PassOwnPtrWillBeRawPtr<ExpressionHeapVector> expressions)
85 , m_mediaType(attemptStaticStringCreation(mediaType.lower()))
86 , m_expressions(expressions)
89 m_expressions = adoptPtrWillBeNoop(new ExpressionHeapVector);
93 nonCopyingSort(m_expressions->begin(), m_expressions->end(), expressionCompare);
95 // Remove all duplicated expressions.
96 MediaQueryExp* key = 0;
97 for (int i = m_expressions->size() - 1; i >= 0; --i) {
98 MediaQueryExp* exp = m_expressions->at(i).get();
100 if (key && *exp == *key)
101 m_expressions->remove(i);
107 MediaQuery::MediaQuery(const MediaQuery& o)
108 : m_restrictor(o.m_restrictor)
109 , m_mediaType(o.m_mediaType)
110 , m_expressions(adoptPtrWillBeNoop(new ExpressionHeapVector(o.m_expressions->size())))
111 , m_serializationCache(o.m_serializationCache)
113 for (unsigned i = 0; i < m_expressions->size(); ++i)
114 (*m_expressions)[i] = o.m_expressions->at(i)->copy();
117 MediaQuery::~MediaQuery()
121 // http://dev.w3.org/csswg/cssom/#compare-media-queries
122 bool MediaQuery::operator==(const MediaQuery& other) const
124 return cssText() == other.cssText();
127 // http://dev.w3.org/csswg/cssom/#serialize-a-list-of-media-queries
128 String MediaQuery::cssText() const
130 if (m_serializationCache.isNull())
131 const_cast<MediaQuery*>(this)->m_serializationCache = serialize();
133 return m_serializationCache;
136 void MediaQuery::trace(Visitor* visitor)
138 // We don't support tracing of vectors of OwnPtrs (ie. OwnPtr<Vector<OwnPtr<MediaQuery> > >).
139 // Since this is a transitional object we are just ifdef'ing it out when oilpan is not enabled.
141 visitor->trace(m_expressions);