third_party/blink/renderer/bindings/core/v8/v8_event_listener_helper.h

/*
 * Copyright (C) 2009 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * 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,
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 */

#ifndef THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_V8_EVENT_LISTENER_HELPER_H_
#define THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_V8_EVENT_LISTENER_HELPER_H_

#include "third_party/blink/renderer/bindings/core/v8/v8_binding_for_core.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator.h"
#include "v8/include/v8.h"

namespace blink {

enum ListenerLookupType {
  kListenerFindOnly,
  kListenerFindOrCreate,
};

// This is a container for V8EventListenerOrEventHandler objects that uses
// hidden properties of v8::Object to speed up lookups.
class V8EventListenerHelper {
  STATIC_ONLY(V8EventListenerHelper);

 public:
  CORE_EXPORT static EventListener* GetEventListener(ScriptState*,
                                                     v8::Local<v8::Value>,
                                                     bool is_attribute,
                                                     ListenerLookupType);

  CORE_EXPORT static EventListener* EnsureErrorHandler(ScriptState*,
                                                       v8::Local<v8::Value>);
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_V8_EVENT_LISTENER_HELPER_H_