author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 17 Sep 2010 09:02:29 +0300 | |
changeset 0 | 4f2f89ce4247 |
permissions | -rw-r--r-- |
0
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/* |
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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 COMPUTER, 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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|
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#include "config.h" |
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#include "MediaQuery.h" |
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|
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#include "MediaQueryExp.h" |
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#include "StringBuilder.h" |
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|
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#include <algorithm> |
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|
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namespace WebCore { |
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|
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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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StringBuilder result; |
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|
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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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break; |
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} |
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|
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if (m_expressions->isEmpty()) { |
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result.append(m_mediaType); |
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return result.toString(); |
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} |
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|
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if (m_mediaType != "all" || m_restrictor != None) { |
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result.append(m_mediaType); |
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result.append(" and "); |
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} |
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|
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result.append(m_expressions->at(0)->serialize()); |
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for (size_t i = 1; i < m_expressions->size(); ++i) { |
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result.append(" and "); |
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result.append(m_expressions->at(i)->serialize()); |
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} |
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return result.toString(); |
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} |
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|
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static bool expressionCompare(const MediaQueryExp* a, const MediaQueryExp* b) |
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{ |
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return codePointCompare(a->serialize(), b->serialize()) < 0; |
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} |
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|
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MediaQuery::MediaQuery(Restrictor r, const String& mediaType, PassOwnPtr<Vector<MediaQueryExp*> > exprs) |
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: m_restrictor(r) |
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, m_mediaType(mediaType.lower()) |
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, m_expressions(exprs) |
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, m_ignored(false) |
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{ |
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if (!m_expressions) { |
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m_expressions = new Vector<MediaQueryExp*>; |
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return; |
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} |
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|
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std::sort(m_expressions->begin(), m_expressions->end(), expressionCompare); |
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|
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// remove all duplicated expressions |
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String key; |
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for (int i = m_expressions->size() - 1; i >= 0; --i) { |
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|
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// if not all of the expressions is valid the media query must be ignored. |
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if (!m_ignored) |
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m_ignored = !m_expressions->at(i)->isValid(); |
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|
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if (m_expressions->at(i)->serialize() == key) { |
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MediaQueryExp* item = m_expressions->at(i); |
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m_expressions->remove(i); |
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delete item; |
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} else |
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key = m_expressions->at(i)->serialize(); |
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} |
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} |
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MediaQuery::~MediaQuery() |
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{ |
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deleteAllValues(*m_expressions); |
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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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String MediaQuery::cssText() const |
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{ |
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if (m_serializationCache.isNull()) |
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const_cast<MediaQuery*>(this)->m_serializationCache = serialize(); |
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return m_serializationCache; |
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} |
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} //namespace |