| /* |
| * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies) |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "sky/engine/core/css/MediaQueryMatcher.h" |
| |
| #include "sky/engine/core/css/MediaList.h" |
| #include "sky/engine/core/css/MediaQueryEvaluator.h" |
| #include "sky/engine/core/css/MediaQueryList.h" |
| #include "sky/engine/core/css/MediaQueryListEvent.h" |
| #include "sky/engine/core/css/MediaQueryListListener.h" |
| #include "sky/engine/core/css/resolver/StyleResolver.h" |
| #include "sky/engine/core/dom/Document.h" |
| #include "sky/engine/core/frame/FrameView.h" |
| #include "sky/engine/core/frame/LocalFrame.h" |
| #include "sky/engine/wtf/Vector.h" |
| |
| // Note: when removing EventTarget, the MediaQuery logic was |
| // disconnected from Documents, and as part of that, the |
| // viewportChanged and mediaFeaturesChanged methods were dropped. |
| |
| namespace blink { |
| |
| PassRefPtr<MediaQueryMatcher> MediaQueryMatcher::create(Document& document) |
| { |
| return adoptRef(new MediaQueryMatcher(document)); |
| } |
| |
| MediaQueryMatcher::MediaQueryMatcher(Document& document) |
| : m_document(&document) |
| { |
| ASSERT(m_document); |
| } |
| |
| DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(MediaQueryMatcher) |
| |
| void MediaQueryMatcher::documentDetached() |
| { |
| m_document = nullptr; |
| m_evaluator = nullptr; |
| } |
| |
| PassOwnPtr<MediaQueryEvaluator> MediaQueryMatcher::createEvaluator() const |
| { |
| if (!m_document || !m_document->frame()) |
| return nullptr; |
| |
| return adoptPtr(new MediaQueryEvaluator(m_document->frame())); |
| } |
| |
| bool MediaQueryMatcher::evaluate(const MediaQuerySet* media) |
| { |
| ASSERT(!m_document || m_document->frame() || !m_evaluator); |
| |
| if (!media) |
| return false; |
| |
| // Cache the evaluator to avoid allocating one per evaluation. |
| if (!m_evaluator) |
| m_evaluator = createEvaluator(); |
| |
| if (m_evaluator) |
| return m_evaluator->eval(media); |
| |
| return false; |
| } |
| |
| PassRefPtr<MediaQueryList> MediaQueryMatcher::matchMedia(const String& query) |
| { |
| if (!m_document) |
| return nullptr; |
| |
| RefPtr<MediaQuerySet> media = MediaQuerySet::create(query); |
| return MediaQueryList::create(this, media); |
| } |
| |
| void MediaQueryMatcher::addMediaQueryList(MediaQueryList* query) |
| { |
| if (!m_document) |
| return; |
| m_mediaLists.add(query); |
| } |
| |
| void MediaQueryMatcher::removeMediaQueryList(MediaQueryList* query) |
| { |
| if (!m_document) |
| return; |
| m_mediaLists.remove(query); |
| } |
| |
| void MediaQueryMatcher::addViewportListener(MediaQueryListListener* listener) |
| { |
| if (!m_document) |
| return; |
| m_viewportListeners.add(listener); |
| } |
| |
| void MediaQueryMatcher::removeViewportListener(MediaQueryListListener* listener) |
| { |
| if (!m_document) |
| return; |
| m_viewportListeners.remove(listener); |
| } |
| |
| } |