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// 
// 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 "nsMacMessagePump.h"
#include "nsToolkit.h"
#include <Quickdraw.h>
#include <Fonts.h>
#include <TextEdit.h>
#include <Dialogs.h>
#ifndef XP_MACOSX
#include <Traps.h>
#endif
#include <Events.h>
#include <Menus.h>

#include <stdlib.h>

#ifndef XP_MACOSX
#include "macstdlibextras.h"
#endif
PRBool nsAppShell::mInitializedToolbox = PR_FALSE;


//-------------------------------------------------------------------------
//
// nsISupports implementation macro
//
//-------------------------------------------------------------------------
NS_IMPL_THREADSAFE_ISUPPORTS1(nsAppShell, nsIAppShell)

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

NS_IMETHODIMP nsAppShell::Create(int* argc, char ** argv)
{
  nsresult rv = NS_GetCurrentToolkit(getter_AddRefs(mToolkit));
  if (NS_FAILED(rv))
   return rv;

  nsIToolkit* toolkit = mToolkit.get();
  mMacPump.reset(new nsMacMessagePump(static_cast<nsToolkit*>(toolkit)));

  if (!mMacPump.get() || ! nsMacMemoryCushion::EnsureMemoryCushion())
    return NS_ERROR_OUT_OF_MEMORY;

  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 (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()
{

#if TARGET_CARBON
  mInitializedToolbox = PR_TRUE;
#else 
  // The toolbox initialization code has moved to NSStdLib (InitializeToolbox)
  
  if (!mInitializedToolbox)
  {
    InitializeMacToolbox();
    mInitializedToolbox = PR_TRUE;
  }
#endif
  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;
}