text: // -------------------------------------------------
  // BlinKit - BlinKit Library
  // -------------------------------------------------
  //   File Name: IdTargetObserver.cpp
  // Description: IdTargetObserver Class
  //      Author: Ziming Li
  //     Created: 2021-10-03
  // -------------------------------------------------
  // Copyright (C) 2021 MingYang Software Technology.
  // -------------------------------------------------
  
  /*
   * Copyright (C) 2012 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.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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/IdTargetObserver.h"
  
  #include "core/dom/IdTargetObserverRegistry.h"
  
  namespace blink {
  
  IdTargetObserver::IdTargetObserver(IdTargetObserverRegistry& observerRegistry, const AtomicString& id)
      : m_registry(observerRegistry)
      , m_id(id)
  {
      registry().addObserver(m_id, this);
  }
  
  IdTargetObserver::~IdTargetObserver()
  {
      registry().removeObserver(m_id, this);
  }
  
  void IdTargetObserver::unregister()
  {
      // Nothing to do.
  }
  
  } // namespace blink
  