1/*
2 * Copyright (C) 2012 Google, 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 GOOGLE 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 "FeatureObserver.h"
28
29#include "DOMWindow.h"
30#include "Document.h"
31#include "HistogramSupport.h"
32#include "Page.h"
33
34namespace WebCore {
35
36FeatureObserver::FeatureObserver()
37{
38}
39
40FeatureObserver::~FeatureObserver()
41{
42    updateMeasurements();
43}
44
45void FeatureObserver::updateMeasurements()
46{
47    if (!m_featureBits)
48        return;
49
50    // Clearing feature bits is timing sensitive. Ports other than chromium do not use HistogramSupport,
51    // and pull the results on certain navigation events instead.
52    m_featureBits->clearAll();
53}
54
55void FeatureObserver::didCommitLoad()
56{
57    updateMeasurements();
58}
59
60void FeatureObserver::observe(Document* document, Feature feature)
61{
62    if (!document)
63        return;
64
65    Page* page = document->page();
66    if (!page)
67        return;
68
69    page->featureObserver()->didObserve(feature);
70}
71
72void FeatureObserver::observe(DOMWindow* domWindow, Feature feature)
73{
74    ASSERT(domWindow);
75    observe(domWindow->document(), feature);
76}
77
78} // namespace WebCore
79