/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svx.hxx"
#include <svx/sdr/event/eventhandler.hxx>

// for SOLARIS compiler include of algorithm part of _STL is necessary to
// get access to basic algos like ::std::find
#include <algorithm>
#include <tools/debug.hxx>

//////////////////////////////////////////////////////////////////////////////

namespace sdr
{
	namespace event
	{
		BaseEvent::BaseEvent(EventHandler& rEventHandler)
		:	mrEventHandler(rEventHandler)
		{
			mrEventHandler.AddEvent(*this);
		}

		BaseEvent::~BaseEvent()
		{
			mrEventHandler.RemoveEvent(*this);
		}
	} // end of namespace mixer
} // end of namespace sdr

//////////////////////////////////////////////////////////////////////////////

namespace sdr
{
	namespace event
	{
		void EventHandler::AddEvent(BaseEvent& rBaseEvent)
		{
			maVector.push_back(&rBaseEvent);
		}

		void EventHandler::RemoveEvent(BaseEvent& rBaseEvent)
		{
			if(maVector.back() == &rBaseEvent)
			{
				// the one to remove is the last, pop
				maVector.pop_back();
			}
			else
			{
				const BaseEventVector::iterator aFindResult = ::std::find(
					maVector.begin(), maVector.end(), &rBaseEvent);
				DBG_ASSERT(aFindResult != maVector.end(),
					"EventHandler::RemoveEvent: Event to be removed not found (!)");
				maVector.erase(aFindResult);
			}
		}

		BaseEvent* EventHandler::GetEvent()
		{
			if(!maVector.empty())
			{
				// get the last event, that one is fastest to be removed
				return maVector.back();
			}
			else
			{
				return 0L;
			}
		}

		EventHandler::EventHandler()
		{
		}

		EventHandler::~EventHandler()
		{
			while(!maVector.empty())
			{
				delete GetEvent();
			}
		}

		// Trigger and consume the events
		void EventHandler::ExecuteEvents()
		{
            for(;;)
            {
                BaseEvent* pEvent = GetEvent();
                if(pEvent == NULL)
                    break;
				pEvent->ExecuteEvent();
				delete pEvent;
			}
		}

		// for control
		sal_Bool EventHandler::IsEmpty() const
		{
			return (0L == maVector.size());
		}
	} // end of namespace mixer
} // end of namespace sdr

//////////////////////////////////////////////////////////////////////////////

namespace sdr
{
	namespace event
	{
		TimerEventHandler::TimerEventHandler(sal_uInt32 nTimeout)
		{
			SetTimeout(nTimeout);
			Stop();
		}

		TimerEventHandler::~TimerEventHandler()
		{
			Stop();
		}

		// The timer when it is triggered; from class Timer
		void TimerEventHandler::Timeout()
		{
			ExecuteEvents();
		}

		// reset the timer
		void TimerEventHandler::Restart()
		{
			Start();
		}
	} // end of namespace mixer
} // end of namespace sdr

//////////////////////////////////////////////////////////////////////////////
// eof