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 "core/css/MediaQueryMatcher.h"
23 #include "core/css/MediaList.h"
24 #include "core/css/MediaQueryEvaluator.h"
25 #include "core/css/MediaQueryList.h"
26 #include "core/css/MediaQueryListListener.h"
27 #include "core/css/resolver/StyleResolver.h"
28 #include "core/dom/Document.h"
29 #include "core/frame/FrameView.h"
30 #include "core/frame/LocalFrame.h"
34 MediaQueryMatcher::Listener::Listener(PassRefPtrWillBeRawPtr<MediaQueryListListener> listener, PassRefPtrWillBeRawPtr<MediaQueryList> query)
35 : m_listener(listener)
40 void MediaQueryMatcher::Listener::evaluate(MediaQueryEvaluator* evaluator)
42 if (m_query->evaluate(evaluator))
43 m_listener->queryChanged(m_query.get());
46 void MediaQueryMatcher::Listener::trace(Visitor* visitor)
48 visitor->trace(m_listener);
49 visitor->trace(m_query);
52 MediaQueryMatcher::MediaQueryMatcher(Document* document)
53 : m_document(document)
54 , m_evaluationRound(1)
59 DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(MediaQueryMatcher)
61 void MediaQueryMatcher::documentDestroyed()
67 AtomicString MediaQueryMatcher::mediaType() const
69 if (!m_document || !m_document->frame() || !m_document->frame()->view())
72 return m_document->frame()->view()->mediaType();
75 PassOwnPtr<MediaQueryEvaluator> MediaQueryMatcher::prepareEvaluator() const
77 if (!m_document || !m_document->frame())
80 return adoptPtr(new MediaQueryEvaluator(mediaType(), m_document->frame()));
83 bool MediaQueryMatcher::evaluate(const MediaQuerySet* media)
88 OwnPtr<MediaQueryEvaluator> evaluator(prepareEvaluator());
89 return evaluator && evaluator->eval(media);
92 PassRefPtrWillBeRawPtr<MediaQueryList> MediaQueryMatcher::matchMedia(const String& query)
97 RefPtrWillBeRawPtr<MediaQuerySet> media = MediaQuerySet::create(query);
98 // Add warning message to inspector whenever dpi/dpcm values are used for "screen" media.
99 reportMediaQueryWarningIfNeeded(m_document, media.get());
100 return MediaQueryList::create(this, media, evaluate(media.get()));
103 void MediaQueryMatcher::addListener(PassRefPtrWillBeRawPtr<MediaQueryListListener> listener, PassRefPtrWillBeRawPtr<MediaQueryList> query)
108 for (size_t i = 0; i < m_listeners.size(); ++i) {
109 if (*m_listeners[i]->listener() == *listener && m_listeners[i]->query() == query)
113 m_listeners.append(adoptPtrWillBeNoop(new Listener(listener, query)));
116 void MediaQueryMatcher::removeListener(MediaQueryListListener* listener, MediaQueryList* query)
121 for (size_t i = 0; i < m_listeners.size(); ++i) {
122 if (*m_listeners[i]->listener() == *listener && m_listeners[i]->query() == query) {
123 m_listeners.remove(i);
129 void MediaQueryMatcher::styleResolverChanged()
135 OwnPtr<MediaQueryEvaluator> evaluator = prepareEvaluator();
139 for (size_t i = 0; i < m_listeners.size(); ++i)
140 m_listeners[i]->evaluate(evaluator.get());
143 void MediaQueryMatcher::trace(Visitor* visitor)
145 // We don't support tracing of vectors of OwnPtrs (ie. Vector<OwnPtr<Listener> >).
146 // Since this is a transitional object we are just ifdef'ing it out when oilpan is not enabled.
148 visitor->trace(m_listeners);