1/* 2 * Copyright (C) 2009 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "StyleMedia.h" 28 29#include "Document.h" 30#include "Frame.h" 31#include "FrameView.h" 32#include "MediaList.h" 33#include "MediaQueryEvaluator.h" 34#include "NodeRenderStyle.h" 35#include "StyleResolver.h" 36 37namespace WebCore { 38 39StyleMedia::StyleMedia(Frame* frame) 40 : DOMWindowProperty(frame) 41{ 42} 43 44String StyleMedia::type() const 45{ 46 FrameView* view = m_frame ? m_frame->view() : 0; 47 if (view) 48 return view->mediaType(); 49 50 return String(); 51} 52 53bool StyleMedia::matchMedium(const String& query) const 54{ 55 if (!m_frame) 56 return false; 57 58 Document* document = m_frame->document(); 59 ASSERT(document); 60 Element* documentElement = document->documentElement(); 61 if (!documentElement) 62 return false; 63 64 RefPtr<RenderStyle> rootStyle = document->ensureStyleResolver().styleForElement(documentElement, document->renderStyle(), DisallowStyleSharing, MatchOnlyUserAgentRules); 65 66 RefPtr<MediaQuerySet> media = MediaQuerySet::create(); 67 if (!media->parse(query)) 68 return false; 69 70 MediaQueryEvaluator screenEval(type(), m_frame, rootStyle.get()); 71 return screenEval.eval(media.get()); 72} 73 74} // namespace WebCore 75