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