/* * CSS Media Query * * Copyright (C) 2005, 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>. * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include "MediaQuery.h" #include <wtf/text/StringBuilder.h> namespace WebCore { // http://dev.w3.org/csswg/cssom/#serialize-a-media-query String MediaQuery::serialize() const { if (m_ignored) { // If query is invalid, serialized text should turn into "not all". return ASCIILiteral("not all"); } bool shouldOmitMediaType = false; StringBuilder result; switch (m_restrictor) { case MediaQuery::Only: result.appendLiteral("only "); break; case MediaQuery::Not: result.appendLiteral("not "); break; case MediaQuery::None: shouldOmitMediaType = !m_expressions.isEmpty() && m_mediaType == "all"; break; } bool needsAnd = false; if (!shouldOmitMediaType) { result.append(m_mediaType); needsAnd = true; } for (auto& expression : m_expressions) { if (needsAnd) result.appendLiteral(" and "); result.append(expression.serialize()); needsAnd = true; } return result.toString(); } MediaQuery::MediaQuery(Restrictor restrictor, const String& mediaType, Vector<MediaQueryExpression>&& expressions) : m_restrictor(restrictor) , m_mediaType(mediaType.convertToASCIILowercase()) , m_expressions(WTFMove(expressions)) { std::sort(m_expressions.begin(), m_expressions.end(), [](auto& a, auto& b) { return codePointCompare(a.serialize(), b.serialize()) < 0; }); // Remove all duplicated expressions. String key; for (int i = m_expressions.size() - 1; i >= 0; --i) { // If any expression is invalid the media query must be ignored. if (!m_ignored) m_ignored = !m_expressions[i].isValid(); if (m_expressions[i].serialize() == key) m_expressions.remove(i); else key = m_expressions[i].serialize(); } } // http://dev.w3.org/csswg/cssom/#compare-media-queries bool MediaQuery::operator==(const MediaQuery& other) const { return cssText() == other.cssText(); } // http://dev.w3.org/csswg/cssom/#serialize-a-list-of-media-queries const String& MediaQuery::cssText() const { if (m_serializationCache.isNull()) m_serializationCache = serialize(); return m_serializationCache; } } //namespace