2 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
21 #include "MediaQueryMatcher.h"
23 #include "CSSStyleSelector.h"
27 #include "FrameView.h"
28 #include "MediaList.h"
29 #include "MediaQueryEvaluator.h"
30 #include "MediaQueryList.h"
31 #include "MediaQueryListListener.h"
35 MediaQueryMatcher::Listener::Listener(PassRefPtr<MediaQueryListListener> listener, PassRefPtr<MediaQueryList> query)
36 : m_listener(listener)
41 MediaQueryMatcher::Listener::~Listener()
45 void MediaQueryMatcher::Listener::evaluate(ScriptState* state, MediaQueryEvaluator* evaluator)
48 m_query->evaluate(evaluator, notify);
50 m_listener->queryChanged(state, m_query.get());
53 MediaQueryMatcher::MediaQueryMatcher(Document* document)
54 : m_document(document)
55 , m_evaluationRound(1)
60 MediaQueryMatcher::~MediaQueryMatcher()
64 void MediaQueryMatcher::documentDestroyed()
70 String MediaQueryMatcher::mediaType() const
72 if (!m_document || !m_document->frame() || !m_document->frame()->view())
75 return m_document->frame()->view()->mediaType();
78 PassOwnPtr<MediaQueryEvaluator> MediaQueryMatcher::prepareEvaluator() const
80 if (!m_document || !m_document->frame())
83 Element* documentElement = m_document->documentElement();
87 CSSStyleSelector* styleSelector = m_document->styleSelector();
91 RefPtr<RenderStyle> rootStyle = styleSelector->styleForElement(documentElement, 0 /*defaultParent*/, false /*allowSharing*/, true /*resolveForRootDefault*/);
93 return adoptPtr(new MediaQueryEvaluator(mediaType(), m_document->frame(), rootStyle.get()));
96 bool MediaQueryMatcher::evaluate(MediaList* media)
101 OwnPtr<MediaQueryEvaluator> evaluator(prepareEvaluator());
102 return evaluator && evaluator->eval(media);
105 PassRefPtr<MediaQueryList> MediaQueryMatcher::matchMedia(const String& query)
110 RefPtr<MediaList> media = MediaList::create(query, false);
111 return MediaQueryList::create(this, media, evaluate(media.get()));
114 void MediaQueryMatcher::addListener(PassRefPtr<MediaQueryListListener> listener, PassRefPtr<MediaQueryList> query)
119 for (size_t i = 0; i < m_listeners.size(); ++i) {
120 if (*m_listeners[i]->listener() == *listener && m_listeners[i]->query() == query)
124 m_listeners.append(adoptPtr(new Listener(listener, query)));
127 void MediaQueryMatcher::removeListener(MediaQueryListListener* listener, MediaQueryList* query)
132 for (size_t i = 0; i < m_listeners.size(); ++i) {
133 if (*m_listeners[i]->listener() == *listener && m_listeners[i]->query() == query) {
134 m_listeners.remove(i);
140 void MediaQueryMatcher::styleSelectorChanged()
144 ScriptState* scriptState = mainWorldScriptState(m_document->frame());
149 OwnPtr<MediaQueryEvaluator> evaluator = prepareEvaluator();
153 for (size_t i = 0; i < m_listeners.size(); ++i)
154 m_listeners[i]->evaluate(scriptState, evaluator.get());