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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name of Google Inc. nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "core/dom/custom/V0CustomElementObserver.h"
#include "core/dom/Element.h"
namespace blink {
// Maps elements to the observer watching them. At most one per
// element at a time.
typedef HeapHashMap<WeakMember<Element>, Member<V0CustomElementObserver>>
ElementObserverMap;
static ElementObserverMap& elementObservers() {
DEFINE_STATIC_LOCAL(ElementObserverMap, map, (new ElementObserverMap));
return map;
}
void V0CustomElementObserver::notifyElementWasDestroyed(Element* element) {
ElementObserverMap::iterator it = elementObservers().find(element);
if (it == elementObservers().end())
return;
it->value->elementWasDestroyed(element);
}
void V0CustomElementObserver::observe(Element* element) {
ElementObserverMap::AddResult result = elementObservers().add(element, this);
DCHECK(result.isNewEntry);
}
void V0CustomElementObserver::unobserve(Element* element) {
V0CustomElementObserver* observer = elementObservers().take(element);
DCHECK_EQ(observer, this);
}
} // namespace blink
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