/*
* 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.
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* 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
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*/
#ifndef CustomElementObserver_h
#define CustomElementObserver_h
#include "wtf/HashMap.h"
namespace WebCore {
class Element;
class CustomElementObserver {
public:
CustomElementObserver() { }
virtual ~CustomElementObserver() { }
// API for CustomElement to kick off notifications
static void notifyElementDidFinishParsingChildren(Element*);
static void notifyElementWasDestroyed(Element*);
protected:
void observe(Element*);
void unobserve(Element*);
virtual void elementDidFinishParsingChildren(Element*) = 0;
virtual void elementWasDestroyed(Element* element) { unobserve(element); }
private:
// Maps elements to the observer watching them. At most one per
// element at a time.
typedef HashMap<Element*, CustomElementObserver*> ElementObserverMap;
static ElementObserverMap& elementObservers();
};
}
#endif // CustomElementObserver_h