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
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include "core/css/MediaQuery.h"
32 #include "core/css/MediaQueryExp.h"
33 #include "wtf/NonCopyingSort.h"
34 #include "wtf/text/StringBuilder.h"
38 // http://dev.w3.org/csswg/cssom/#serialize-a-media-query
39 String MediaQuery::serialize() const
42 switch (m_restrictor) {
43 case MediaQuery::Only:
44 result.append("only ");
47 result.append("not ");
49 case MediaQuery::None:
53 if (m_expressions->isEmpty()) {
54 result.append(m_mediaType);
55 return result.toString();
58 if (m_mediaType != "all" || m_restrictor != None) {
59 result.append(m_mediaType);
60 result.append(" and ");
63 result.append(m_expressions->at(0)->serialize());
64 for (size_t i = 1; i < m_expressions->size(); ++i) {
65 result.append(" and ");
66 result.append(m_expressions->at(i)->serialize());
68 return result.toString();
71 static bool expressionCompare(const OwnPtr<MediaQueryExp>& a, const OwnPtr<MediaQueryExp>& b)
73 return codePointCompare(a->serialize(), b->serialize()) < 0;
76 MediaQuery::MediaQuery(Restrictor r, const AtomicString& mediaType, PassOwnPtr<ExpressionVector> expressions)
78 , m_mediaType(mediaType.lower())
79 , m_expressions(expressions)
82 m_expressions = adoptPtr(new ExpressionVector);
86 nonCopyingSort(m_expressions->begin(), m_expressions->end(), expressionCompare);
88 // Remove all duplicated expressions.
89 MediaQueryExp* key = 0;
90 for (int i = m_expressions->size() - 1; i >= 0; --i) {
91 MediaQueryExp* exp = m_expressions->at(i).get();
93 if (key && *exp == *key)
94 m_expressions->remove(i);
100 MediaQuery::MediaQuery(const MediaQuery& o)
101 : m_restrictor(o.m_restrictor)
102 , m_mediaType(o.m_mediaType)
103 , m_expressions(adoptPtr(new ExpressionVector(o.m_expressions->size())))
104 , m_serializationCache(o.m_serializationCache)
106 for (unsigned i = 0; i < m_expressions->size(); ++i)
107 (*m_expressions)[i] = o.m_expressions->at(i)->copy();
110 MediaQuery::~MediaQuery()
114 // http://dev.w3.org/csswg/cssom/#compare-media-queries
115 bool MediaQuery::operator==(const MediaQuery& other) const
117 return cssText() == other.cssText();
120 // http://dev.w3.org/csswg/cssom/#serialize-a-list-of-media-queries
121 String MediaQuery::cssText() const
123 if (m_serializationCache.isNull())
124 const_cast<MediaQuery*>(this)->m_serializationCache = serialize();
126 return m_serializationCache;