/*
**************************************
* Restrict Class v1.0 *
* Autor: Carlos R. L. Rodrigues *
**************************************
*/
//========================================================
// REQUIRES http://www.jsfromhell.com/geral/event-listener
//========================================================
Restrict = function(form){
this.form = form, this.field = {}, this.mask = {};
}
Restrict.field = Restrict.inst = Restrict.c = null;
Restrict.prototype.start = function(){
var $, __ = document.forms[this.form], s, x, j, c, sp, o = this, l;
var p = {".":/./, w:/\w/, W:/\W/, d:/\d/, D:/\D/, s:/\s/, a:/[\xc0-\xff]/, A:/[^\xc0-\xff]/};
for(var _ in $ = this.field)
if(/text|textarea|password/i.test(__[_].type)){
x = $[_].split(""), c = j = 0, sp, s = [[],[]];
for(var i = 0, l = x.length; i < l; i++)
if(x[i] == "\\" || sp){
if(sp = !sp) continue;
s[j][c++] = p[x[i]] || x[i];
}
else if(x[i] == "^") c = (j = 1) - 1;
else s[j][c++] = x[i];
o.mask[__[_].name] && (__[_].maxLength = o.mask[__[_].name].length);
__[_].pt = s, addEvent(__[_], "keydown", function(e){
var r = Restrict.field = e.target;
if(!o.mask[r.name]) return;
r.l = r.value.length, Restrict.inst = o; Restrict.c = e.key;
setTimeout(o.onchanged, r.e = 1);
});
addEvent(__[_], "keyup", function(e){
(Restrict.field = e.target).e = 0;
});
addEvent(__[_], "keypress", function(e){
o.restrict(e) || e.preventDefault();
var r = Restrict.field = e.target;
if(!o.mask[r.name]) return;
if(!r.e){
r.l = r.value.length, Restrict.inst = o, Restrict.c = e.key || 0;
setTimeout(o.onchanged, 1);
}
});
}
}
Restrict.prototype.restrict = function(e){
var o, c = e.key, n = (o = e.target).name, r;
var has = function(c, r){
for(var i = r.length; i--;)
if((r[i] instanceof RegExp && r[i].test(c)) || r[i] == c) return true;
return false;
}
var inRange = function(c){
return has(c, o.pt[0]) && !has(c, o.pt[1]);
}
return (c < 30 || inRange(String.fromCharCode(c))) ?
(this.onKeyAccept && this.onKeyAccept(o, c), !0) :
(this.onKeyRefuse && this.onKeyRefuse(o, c), !1);
}
Restrict.prototype.onchanged = function(){
var ob = Restrict, si, moz = false, o = ob.field, t, lt = (t = o.value).length, m = ob.inst.mask[o.name];
if(o.l == o.value.length) return;
if(si = o.selectionStart) moz = true;
else if(o.createTextRange){
var obj = document.selection.createRange(), r = o.createTextRange();
if(!r.setEndPoint) return false;
r.setEndPoint("EndToStart", obj); si = r.text.length;
}
else return false;
for(var i in m = m.split(""))
if(m[i] != "#")
t = t.replace(m[i] == "\\" ? m[++i] : m[i], "");
var j = 0, h = "", l = m.length, ini = si == 1, t = t.split("");
for(i = 0; i < l; i++)
if(m[i] != "#"){
if(m[i] == "\\" && (h += m[++i])) continue;
h += m[i], i + 1 == l && (t[j - 1] += h, h = "");
}
else{
if(!t[j] && !(h = "")) break;
(t[j] = h + t[j++]) && (h = "");
}
o.value = o.maxLength > -1 && o.maxLength < (t = t.join("")).length ? t.slice(0, o.maxLength) : t;
if(ob.c && ob.c != 46 && ob.c != 8){
if(si != lt){
while(m[si] != "#" && m[si]) si++;
ini && m[0] != "#" && si++;
}
else si = o.value.length;
}
!moz ? (obj.move("character", si), obj.select()) : o.setSelectionRange(si, si);
}