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
StyleMedia(Frame * frame)37 StyleMedia::StyleMedia(Frame* frame)
38 : m_frame(frame)
39 {
40 }
41
type() const42 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
matchMedium(const String & query) const51 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