/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
/*
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (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.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */

// 
// nsAppShell
//
// This file contains the default implementation of the application shell. Clients
// may either use this implementation or write their own. If you write your
// own, you must create a message sink to route events to. (The message sink
// interface may change, so this comment must be updated accordingly.)
//

#include "nsAppShell.h"
#include "nsIAppShell.h"

#include "nsIEventQueueService.h"
#include "nsIServiceManager.h"
#include "nsIWidget.h"
#include "nsMacMessageSink.h"
#include "nsMacMessagePump.h"
#include "nsToolKit.h"
#include <Quickdraw.h>
#include <Fonts.h>
#include <TextEdit.h>
#include <Dialogs.h>
#include <Traps.h>
#include <Events.h>
#include <Menus.h>

#include <stdlib.h>

#include "macstdlibextras.h"

PRBool nsAppShell::mInitializedToolbox = PR_FALSE;


//-------------------------------------------------------------------------
//
// nsISupports implementation macro
//
//-------------------------------------------------------------------------
NS_DEFINE_IID(kIAppShellIID, NS_IAPPSHELL_IID);
NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);

NS_IMPL_ISUPPORTS(nsAppShell,kIAppShellIID);

NS_IMETHODIMP nsAppShell::SetDispatchListener(nsDispatchListener* aDispatchListener)
{
  mDispatchListener = aDispatchListener;
  return NS_OK;
}

//-------------------------------------------------------------------------
//
// Create the application shell
//
//-------------------------------------------------------------------------

NS_IMETHODIMP nsAppShell::Create(int* argc, char ** argv)
{
	mToolKit = auto_ptr<nsToolkit>( new nsToolkit() );
	mMacSink = auto_ptr<nsMacMessageSink>( new nsMacMessageSink() );
	mMacPump = auto_ptr<nsMacMessagePump>( new nsMacMessagePump(mToolKit.get(), mMacSink.get()) );
	return NS_OK;
}

//-------------------------------------------------------------------------
//
// Enter a message handler loop
//
//-------------------------------------------------------------------------
NS_IMETHODIMP nsAppShell::Run(void)
{
	if (!mMacPump.get())
		return NS_ERROR_NOT_INITIALIZED;

	mMacPump->StartRunning();
	mMacPump->DoMessagePump();

  //if (mDispatchListener)
    //mDispatchListener->AfterDispatch();

	if (mExitCalled)	// hack: see below
	{
		mRefCnt --;
		if (mRefCnt == 0)
			delete this;
	}

  return NS_OK;
}

//-------------------------------------------------------------------------
//
// Exit appshell
//
//-------------------------------------------------------------------------
NS_IMETHODIMP nsAppShell::Exit(void)
{
	if (mMacPump.get())
	{
		Spindown();
		mExitCalled = PR_TRUE;
		mRefCnt ++;			// hack: since the applications are likely to delete us
										// after calling this method (see nsViewerApp::Exit()),
										// we temporarily bump the refCnt to let the message pump
										// exit properly. The object will delete itself afterwards.
	}
	return NS_OK;
}

//-------------------------------------------------------------------------
//
// respond to notifications that an event queue has come or gone
//
//-------------------------------------------------------------------------
NS_IMETHODIMP nsAppShell::ListenToEventQueue(nsIEventQueue * aQueue, PRBool aListen)
{ // unnecessary; handled elsewhere
  return NS_OK;
}

//-------------------------------------------------------------------------
//
// Prepare to process events
//
//-------------------------------------------------------------------------
NS_IMETHODIMP nsAppShell::Spinup(void)
{
	if (mMacPump.get())
	{
		mMacPump->StartRunning();
		return NS_OK;
	}
	return NS_ERROR_NOT_INITIALIZED;
}

//-------------------------------------------------------------------------
//
// Stop being prepared to process events.
//
//-------------------------------------------------------------------------
NS_IMETHODIMP nsAppShell::Spindown(void)
{
	if (mMacPump.get())
		mMacPump->StopRunning();
	return NS_OK;
}

//-------------------------------------------------------------------------
//
// nsAppShell constructor
//
//-------------------------------------------------------------------------
nsAppShell::nsAppShell()
{ 
  // The toolbox initialization code has moved to NSStdLib (InitializeToolbox)
  
  if (!mInitializedToolbox)
  {
    InitializeMacToolbox();
    mInitializedToolbox = PR_TRUE;
  }
  mRefCnt = 0;
  mExitCalled = PR_FALSE;
}

//-------------------------------------------------------------------------
//
// nsAppShell destructor
//
//-------------------------------------------------------------------------
nsAppShell::~nsAppShell()
{
}

NS_METHOD
nsAppShell::GetNativeEvent(PRBool &aRealEvent, void *&aEvent)
{
	static EventRecord	theEvent;	// icky icky static (can't really do any better)

	if (!mMacPump.get())
		return NS_ERROR_NOT_INITIALIZED;

	aRealEvent = mMacPump->GetEvent(theEvent);
	aEvent = &theEvent;
	return NS_OK;
}

NS_METHOD
nsAppShell::DispatchNativeEvent(PRBool aRealEvent, void *aEvent)
{
	if (!mMacPump.get())
		return NS_ERROR_NOT_INITIALIZED;

	mMacPump->DispatchEvent(aRealEvent, (EventRecord *) aEvent);
	return NS_OK;
}