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/dom/Document.h"
32#include "core/frame/FrameView.h"
33#include "core/frame/LocalFrame.h"
34
35namespace blink {
36
37StyleMedia::StyleMedia(LocalFrame* frame)
38    : DOMWindowProperty(frame)
39{
40}
41
42AtomicString StyleMedia::type() const
43{
44    FrameView* view = m_frame ? m_frame->view() : 0;
45    if (view)
46        return view->mediaType();
47
48    return nullAtom;
49}
50
51bool 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    RefPtrWillBeRawPtr<MediaQuerySet> media = MediaQuerySet::create();
63    if (!media->set(query))
64        return false;
65
66    MediaQueryEvaluator screenEval(m_frame);
67    return screenEval.eval(media.get());
68}
69
70void StyleMedia::trace(Visitor* visitor)
71{
72    DOMWindowProperty::trace(visitor);
73}
74
75} // namespace blink
76