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
36 namespace WebCore {
37
38 // Maps elements to the observer watching them. At most one per
39 // element at a time.
40 typedef WillBeHeapHashMap<RawPtrWillBeWeakMember<Element>, RawPtrWillBeMember<CustomElementObserver> > ElementObserverMap;
41
elementObservers()42 static ElementObserverMap& elementObservers()
43 {
44 DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<ElementObserverMap>, map, (adoptPtrWillBeNoop(new ElementObserverMap())));
45 return *map;
46 }
47
notifyElementDidFinishParsingChildren(Element * element)48 void 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
notifyElementWasDestroyed(Element * element)56 void 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
observe(Element * element)64 void CustomElementObserver::observe(Element* element)
65 {
66 ElementObserverMap::AddResult result = elementObservers().add(element, this);
67 ASSERT_UNUSED(result, result.isNewEntry);
68 }
69
unobserve(Element * element)70 void CustomElementObserver::unobserve(Element* element)
71 {
72 CustomElementObserver* observer = elementObservers().take(element);
73 ASSERT_UNUSED(observer, observer == this);
74 }
75
76 } // namespace WebCore
77