text: /*
    ==============================================================================
  
     This file is part of the JUCE library.
     Copyright (c) 2022 - Raw Material Software Limited
  
     JUCE is an open source library subject to commercial or open-source
     licensing.
  
     The code included in this file is provided under the terms of the ISC license
     http://www.isc.org/downloads/software-support-policy/isc-license. Permission
     To use, copy, modify, and/or distribute this software for any purpose with or
     without fee is hereby granted provided that the above copyright notice and
     this permission notice appear in all copies.
  
     JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
     EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
     DISCLAIMED.
  
    ==============================================================================
  */
  
  namespace juce
  {
  
  class ActionBroadcaster::ActionMessage  : public MessageManager::MessageBase
  {
  public:
      ActionMessage (const ActionBroadcaster* ab,
                     const String& messageText, ActionListener* l) noexcept
          : broadcaster (const_cast<ActionBroadcaster*> (ab)),
            message (messageText),
            listener (l)
      {}
  
      void messageCallback() override
      {
          if (auto b = broadcaster.get())
              if (b->actionListeners.contains (listener))
                  listener->actionListenerCallback (message);
      }
  
  private:
      WeakReference<ActionBroadcaster> broadcaster;
      const String message;
      ActionListener* const listener;
  
      JUCE_DECLARE_NON_COPYABLE (ActionMessage)
  };
  
  //==============================================================================
  ActionBroadcaster::ActionBroadcaster()
  {
      // are you trying to create this object before or after juce has been initialised??
      JUCE_ASSERT_MESSAGE_MANAGER_EXISTS
  }
  
  ActionBroadcaster::~ActionBroadcaster()
  {
      // all event-based objects must be deleted BEFORE juce is shut down!
      JUCE_ASSERT_MESSAGE_MANAGER_EXISTS
  }
  
  void ActionBroadcaster::addActionListener (ActionListener* const listener)
  {
      const ScopedLock sl (actionListenerLock);
  
      if (listener != nullptr)
          actionListeners.add (listener);
  }
  
  void ActionBroadcaster::removeActionListener (ActionListener* const listener)
  {
      const ScopedLock sl (actionListenerLock);
      actionListeners.removeValue (listener);
  }
  
  void ActionBroadcaster::removeAllActionListeners()
  {
      const ScopedLock sl (actionListenerLock);
      actionListeners.clear();
  }
  
  void ActionBroadcaster::sendActionMessage (const String& message) const
  {
      const ScopedLock sl (actionListenerLock);
  
      for (int i = actionListeners.size(); --i >= 0;)
          (new ActionMessage (this, message, actionListeners.getUnchecked(i)))->post();
  }
  
  } // namespace juce
  