text: /*
   * 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 "config.h"
  #include "core/dom/custom/CustomElementCallbackQueue.h"
  
  namespace WebCore {
  
  PassOwnPtrWillBeRawPtr<CustomElementCallbackQueue> CustomElementCallbackQueue::create(PassRefPtrWillBeRawPtr<Element> element)
  {
      return adoptPtrWillBeNoop(new CustomElementCallbackQueue(element));
  }
  
  CustomElementCallbackQueue::CustomElementCallbackQueue(PassRefPtrWillBeRawPtr<Element> element)
      : m_element(element)
      , m_owner(-1)
      , m_index(0)
      , m_inCreatedCallback(false)
  {
  }
  
  bool CustomElementCallbackQueue::processInElementQueue(ElementQueueId caller)
  {
      ASSERT(!m_inCreatedCallback);
      bool didWork = false;
  
      while (m_index < m_queue.size() && owner() == caller) {
          m_inCreatedCallback = m_queue[m_index]->isCreated();
  
          // dispatch() may cause recursion which steals this callback
          // queue and reenters processInQueue. owner() == caller
          // detects this recursion and cedes processing.
          m_queue[m_index++]->dispatch(m_element.get());
          m_inCreatedCallback = false;
          didWork = true;
      }
  
      if (owner() == caller && m_index == m_queue.size()) {
          // This processInQueue exhausted the queue; shrink it.
          m_index = 0;
          m_queue.resize(0);
          m_owner = -1;
      }
  
      return didWork;
  }
  
  void CustomElementCallbackQueue::trace(Visitor* visitor)
  {
      visitor->trace(m_element);
  }
  
  } // namespace WebCore
  