// Though "Dialog" looks like an object, it isn't really an object.  Instead
// it's just namespace for protecting global symbols.

function Dialog(url, action, init)
{
	if ( typeof init == "undefined" )
		init = window;	// pass this window object by default
	
	if ( document.all && ! HTMLArea.is_safari )
	{
		var value =
			showModalDialog( url, init, "resizable: no; help: no; status: no; scroll: no" );
		
		if ( action )
			action(value);
	}
	else
		Dialog._geckoOpenModal( url, action, init );
}

Dialog._parentEvent = function( ev )
{
	if ( Dialog._modal && !Dialog._modal.closed )
	{
		Dialog._modal.focus();
		
		// we get here in Mozilla only, anyway, so we can safely use
		// the DOM version.
		ev.preventDefault();
		ev.stopPropagation();
	}
}

// should be a function, the return handler of the currently opened dialog.
Dialog._return = null;

// constant, the currently opened dialog
Dialog._modal = null;

// the dialog will read it's args from this variable
Dialog._arguments = null;

Dialog._geckoOpenModal = function( url, action, init )
{
	var dlg = window.open( url, "ha_dialog",
			      "toolbar=no,menubar=no,personalbar=no,width=10,height=10," +
			      "scrollbars=no,resizable=no" );
	Dialog._modal = dlg;
	Dialog._arguments = init;
	
	// make up a function to be called when the Dialog ends.
	Dialog._return = function( val )
	{
		if ( val && action )
			action( val );
		
		relwin( window );
		
		// release other frames
		for ( i = 0; i < window.frames.length; relwin( window.frames[ i++ ] ) );
		
		Dialog._modal = null;
	};

	// capture some window's events
	function capwin( w )
	{
		w.addEventListener( "click", Dialog._parentEvent, true );
		w.addEventListener( "mousedown", Dialog._parentEvent, true );
		w.addEventListener( "focus", Dialog._parentEvent, true );
	}
	
	// release the captured events
	function relwin( w )
	{
		w.removeEventListener( "focus", Dialog._parentEvent, true );
		w.removeEventListener( "mousedown", Dialog._parentEvent, true );
		w.removeEventListener( "click", Dialog._parentEvent, true );
	}
	
	capwin( window );
	
	var i;
	
	// capture other frames
	for ( i = 0; i < window.frames.length; i++ )
	{
		capwin( window.frames[ i ] );
	}
};