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 "StyleMedia.h" 28 29 #include "CSSStyleSelector.h" 30 #include "Frame.h" 31 #include "FrameView.h" 32 #include "MediaList.h" 33 #include "MediaQueryEvaluator.h" 34 35 namespace WebCore { 36 37 StyleMedia::StyleMedia(Frame* frame) 38 : m_frame(frame) 39 { 40 } 41 42 String StyleMedia::type() const 43 { 44 FrameView* view = m_frame ? m_frame->view() : 0; 45 if (view) 46 return view->mediaType(); 47 48 return String(); 49 } 50 51 bool StyleMedia::matchMedium(const String& query) const 52 { 53 if (!m_frame) 54 return false; 55 56 Document* document = m_frame->document(); 57 ASSERT(document); 58 Element* documentElement = document->documentElement(); 59 if (!documentElement) 60 return false; 61 62 CSSStyleSelector* styleSelector = document->styleSelector(); 63 if (!styleSelector) 64 return false; 65 66 RefPtr<RenderStyle> rootStyle = styleSelector->styleForElement(documentElement, 0 /*defaultParent*/, false /*allowSharing*/, true /*resolveForRootDefault*/); 67 RefPtr<MediaList> media = MediaList::create(); 68 69 ExceptionCode ec = 0; 70 media->setMediaText(query, ec); 71 if (ec) 72 return false; 73 74 MediaQueryEvaluator screenEval(type(), m_frame, rootStyle.get()); 75 return screenEval.eval(media.get()); 76 } 77 78 } // namespace WebCore 79
