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 COMPUTER, 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 COMPUTER, 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 "core/css/StyleMedia.h" 28 29 #include "core/css/MediaList.h" 30 #include "core/css/MediaQueryEvaluator.h" 31 #include "core/css/resolver/StyleResolver.h" 32 #include "core/dom/Document.h" 33 #include "core/page/Frame.h" 34 #include "core/page/FrameView.h" 35 36 namespace WebCore { 37 38 StyleMedia::StyleMedia(Frame* frame) 39 : DOMWindowProperty(frame) 40 { 41 } 42 43 String StyleMedia::type() const 44 { 45 FrameView* view = m_frame ? m_frame->view() : 0; 46 if (view) 47 return view->mediaType(); 48 49 return String(); 50 } 51 52 bool StyleMedia::matchMedium(const String& query) const 53 { 54 if (!m_frame) 55 return false; 56 57 Document* document = m_frame->document(); 58 ASSERT(document); 59 Element* documentElement = document->documentElement(); 60 if (!documentElement) 61 return false; 62 63 StyleResolver* styleResolver = document->styleResolver(); 64 if (!styleResolver) 65 return false; 66 67 RefPtr<RenderStyle> rootStyle = styleResolver->styleForElement(documentElement, 0 /*defaultParent*/, DisallowStyleSharing, MatchOnlyUserAgentRules); 68 69 RefPtr<MediaQuerySet> media = MediaQuerySet::create(); 70 if (!media->set(query)) 71 return false; 72 73 MediaQueryEvaluator screenEval(type(), m_frame, rootStyle.get()); 74 return screenEval.eval(media.get()); 75 } 76 77 } // namespace WebCore 78