100 lines
3.2 KiB
C++
100 lines
3.2 KiB
C++
/*
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* CSS Media Query
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*
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* Copyright (C) 2005, 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
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* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "MediaQuery.h"
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#include <wtf/text/StringBuilder.h>
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#include <wtf/text/TextStream.h>
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namespace WebCore {
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// http://dev.w3.org/csswg/cssom/#serialize-a-media-query
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String MediaQuery::serialize() const
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{
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if (m_ignored) {
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// If query is invalid, serialized text should turn into "not all".
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return "not all"_s;
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}
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bool shouldOmitMediaType = false;
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StringBuilder result;
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switch (m_restrictor) {
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case MediaQuery::Only:
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result.append("only ");
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break;
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case MediaQuery::Not:
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result.append("not ");
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break;
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case MediaQuery::None:
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shouldOmitMediaType = !m_expressions.isEmpty() && m_mediaType == "all";
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break;
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}
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bool needsAnd = false;
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if (!shouldOmitMediaType) {
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result.append(m_mediaType);
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needsAnd = true;
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}
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for (auto& expression : m_expressions) {
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if (needsAnd)
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result.append(" and ");
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result.append(expression.serialize());
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needsAnd = true;
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}
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return result.toString();
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}
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MediaQuery::MediaQuery(Restrictor restrictor, const String& mediaType, Vector<MediaQueryExpression>&& expressions)
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: m_mediaType(mediaType.convertToASCIILowercase())
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, m_expressions(WTFMove(expressions))
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, m_restrictor(restrictor)
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{
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}
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// http://dev.w3.org/csswg/cssom/#compare-media-queries
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bool MediaQuery::operator==(const MediaQuery& other) const
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{
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return cssText() == other.cssText();
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}
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// http://dev.w3.org/csswg/cssom/#serialize-a-list-of-media-queries
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const String& MediaQuery::cssText() const
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{
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if (m_serializationCache.isNull())
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m_serializationCache = serialize();
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return m_serializationCache;
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}
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TextStream& operator<<(TextStream& ts, const MediaQuery& query)
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{
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ts << query.cssText();
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return ts;
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}
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} //namespace
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