1/*
2 * Copyright (C) 2013 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 *
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer
12 *    in the documentation and/or other materials provided with the
13 *    distribution.
14 * 3. Neither the name of Google Inc. nor the names of its contributors
15 *    may be used to endorse or promote products derived from this
16 *    software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "core/dom/custom/CustomElementObserver.h"
33
34#include "core/dom/Element.h"
35
36namespace blink {
37
38// Maps elements to the observer watching them. At most one per
39// element at a time.
40typedef WillBeHeapHashMap<RawPtrWillBeWeakMember<Element>, RawPtrWillBeMember<CustomElementObserver> > ElementObserverMap;
41
42static ElementObserverMap& elementObservers()
43{
44    DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<ElementObserverMap>, map, (adoptPtrWillBeNoop(new ElementObserverMap())));
45    return *map;
46}
47
48void CustomElementObserver::notifyElementDidFinishParsingChildren(Element* element)
49{
50    ElementObserverMap::iterator it = elementObservers().find(element);
51    if (it == elementObservers().end())
52        return;
53    it->value->elementDidFinishParsingChildren(element);
54}
55
56void CustomElementObserver::notifyElementWasDestroyed(Element* element)
57{
58    ElementObserverMap::iterator it = elementObservers().find(element);
59    if (it == elementObservers().end())
60        return;
61    it->value->elementWasDestroyed(element);
62}
63
64void CustomElementObserver::observe(Element* element)
65{
66    ElementObserverMap::AddResult result = elementObservers().add(element, this);
67    ASSERT_UNUSED(result, result.isNewEntry);
68}
69
70void CustomElementObserver::unobserve(Element* element)
71{
72    CustomElementObserver* observer = elementObservers().take(element);
73    ASSERT_UNUSED(observer, observer == this);
74}
75
76} // namespace blink
77