keypress.js

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/*
   Milonic DHTML Menu Keypress Module  keypress.js version 2.5 - August 8 2007
   Used for accessibility of the menu. This module will allow the user to navigate Milonic menus via the keyboard.
   
   This module is only compatible with the Milonic DHTML Menu version 5.16 or higher

   Copyright 2005 (c) Milonic Solutions Limited. All Rights Reserved.
   This is a commercial software product, please visit http://www.milonic.com/ for more information.
*/


hotKey_F_Number=2; // This is F2 by default, do not use 1, 4 or 5 as these are reserved by the browser.
_mainM=-1;
_Omo=_menuOpenDelay;
_Cmo=_menuCloseDelay;
KSHIFT=KCTRL=KALT=0;
_jsk=null;

function chr(c){
	return String.fromCharCode(c);
}


function ord(c){
	return c.charCodeAt(0);
}

function getNextKeyItem(i,m)
{
	var a,o;
	o=i+1;
	if(_mi[i]&&_mi[o]&&_mi[o][0]==_mi[i][0]){
		return o;
	}
	else{
		o=m[0][0];
	}
	return o;
}

function getPreKeyItem(i,m)
{
	var a,o;
	o=i-1;
	if(_mi[i]&&o<0||_mi[o][0]!=_mi[i][0])o=m[0][m[0].length-1];
	return o;
}


function getNextMainMenu(v)
{
	for(var x=v;x<_m.length;x++)
	{
		if(_m[x][7])return x
	}
	return v
}


function getMenuByKey(e)
{
	var i,m,ir,tr,omitMenu=0;
	if(_itemRef<0)return
	ir=null
	_ofMT=1	
	i=_itemRef;
	

	if(_mi[_itemRef][34]=="form")
	{
		_ofMT=0
		_menuOpenDelay=_Omo
		_menuCloseDelay=_Cmo
		return
	}
	
	m=_m[_mi[i][0]]
	if(ns6){_jsk=e.which}else{_jsk=event.keyCode}
	_menuOpenDelay=0
	_menuCloseDelay=0

	if(_jsk==16)KSHIFT=1
	if(_jsk==17)KCTRL=1
	if(_jsk==18)KALT=1
	if(_jsk==27){ // Escape
		$Z();
		return false;
	}

	hrgm=$c("mmlink"+_mi[i][0])
	if(hrgm.style.visibility="visible")hrgm.focus()	
	_cm3()

	if(_jsk==9)
	{
		//alert(i)
		if(i<0)
		{
			return false;
		}
		else
		{
			if(KSHIFT)
			{
				
				if(i==m[0][0])
				{
					ir=_m[_mi[i][0]][21]
				}
				else
				{						
					ir=getPreKeyItem(i,m)
				}
				//alert(ir)
				if(ir<0)
				{
					$I()
					return;					
				}
				
			}
			else
			{
				if(_mi[i][3])
				{
					ir=_m[$h(_mi[i][3])][0][0]
				}
				else
				{
					//alert(i + " + " + m[0][m[0].length-1])
					if(i==m[0][m[0].length-1])
					{
						ir=i
						ir=$f(ir);
						if(!ir)ir=_m[getNextMainMenu(m)][0][0]//if last item
						
						_iRR=getNextKeyItem(ir,m)
						while(_mi[_iRR][0]==_mi[m[0][m[0].length-1]][0]){
							ir=$f(ir);
							if(ir+" "==$u){
								$I()
								return;
							}
							_iRR=getNextKeyItem(ir,m)
						}
						ir=getNextKeyItem(ir,m)
					}
					else
					{
						ir=getNextKeyItem(i,m)
					}
				}				
			}
			h$(ir)
		}
		return false
	}

	
	if(m[9]){
		if(_jsk==39)ir=getNextKeyItem(i,m)//Right		
		if(_jsk==37)ir=getPreKeyItem(i,m) //left
		if(_jsk==38){ //Up
			_mn=$h(_mi[i][3])
			if(_mn)ir=_m[_mn][0][_m[_mn][0].length-1]
		}
		
		if(_jsk==40){ //Down
			_mn=$h(_mi[i][3])
			if(_mn)ir=_m[_mn][0][0]
		}		
	}
	else{
		if(_jsk==37){ // left
			ir=$f(i);
			if(!_m[_mi[ir][0]][9]&&_mi[ir][3])ir=ir; else ir=getPreKeyItem(ir,m)

			//if(!_mi[i][3]){
				if(_mi[ir][3]){
					omitMenu=$h(_mi[ir][3])
			//		alert(omitMenu)
					//$Y(omitMenu,0)
				}
			//}
		}
		if(_jsk==39){ // right
			if(_mi[i][3]){
				_mn=$h(_mi[i][3])
				if(_mn)ir=_m[_mn][0][0]
			}
			else{
				ir=$f(i);
				while(ir){
					nir=ir
					ir=$f(ir);
				}
				ir=getNextKeyItem(nir,m)
			}
		}
		if(_jsk==38)ir=getPreKeyItem(i,m) //Up
		if(_jsk==40)ir=getNextKeyItem(i,m) //Down
	}

	if((ir||ir==0)){
		h$(ir,omitMenu);
	}
	
	if(ie){
		if(_jsk==13)hrgm.click();
		return false;
	}	
}

function gMBK(e){
	if(ns6){_jsk=e.which}else{_jsk=event.keyCode}
	if(_jsk==13)return
	if(_itemRef>-1)if(_mi[_itemRef][34]!="form")return false
}



function getNextMainMenu(){
	var a
	if(_mainM>-1)
	{
		for(a=_mainM;a<_m.length;a++){
			if(a>_mainM&&_m[a][7]){
				_mainM=a
				return a;
			}
		}
	}
	
	_mainM=0;
	for(a=0;a<_m.length;a++){
		if(_m[a]&&_m[a][7]){
			_mainM=a
			return a;
		}
	}
	return -1;
}

function getNextMmItem(){
	var m;
	m=getNextMainMenu();
	return _m[m][0][0];
}

function getHotKeys(){
	_hKeys=[];
	for(var a=0;a<_mi.length;a++){
		if(_mi[a][107])_hKeys[_hKeys.length]=$tU(_mi[a][107]);
	}
	return _hKeys;
}


function getMenuByKeyU(e){
	if(ns6){_jsk=e.which}else{_jsk=event.keyCode}

	_hKeys=getHotKeys()
		
		//alert(_jsk)
	if(_jsk==hotKey_F_Number+111)h$(getNextMmItem()) // Need to ensure that this works if first item is not always visible
	
	_menuOpenDelay=_Omo
	_menuCloseDelay=_Cmo
	if(_jsk==16)KSHIFT=0
	if(_jsk==17)KCTRL=0
	if(_jsk==18)KALT=0
	
	if(_itemRef<0)return
}

_d.onkeydown=getMenuByKey;
_d.onkeypress=gMBK;
_d.onkeyup=getMenuByKeyU;

function _iF0C(i){
	h$(i)
}