/*
* Copyright (c) 2007 Josh Bush (digitalbush.com)
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* Version: 1.0
* Release: 2007-07-25
*/
(function($) {
//Helper Functions for Caret positioning
function getCaretPosition(ctl){
var res = {begin: 0, end: 0 };
if (ctl.setSelectionRange){
res.begin = ctl.selectionStart;
res.end = ctl.selectionEnd;
}else if (document.selection && document.selection.createRange){
var range = document.selection.createRange();
res.begin = 0 - range.duplicate().moveStart('character', -100000);
res.end = res.begin + range.text.length;
}
return res;
};
function setCaretPosition(ctl, pos){
if(ctl.setSelectionRange){
ctl.focus();
ctl.setSelectionRange(pos,pos);
}else if (ctl.createTextRange){
var range = ctl.createTextRange();
range.collapse(true);
range.moveEnd('character', pos);
range.moveStart('character', pos);
range.select();
}
};
//Predefined character definitions
var charMap={
'9':"[0-9]",
'a':"[A-Za-z]",
'*':"[A-Za-z0-9]"
};
//Helper method to inject character definitions
$.mask={
addPlaceholder : function(c,r){
charMap[c]=r;
}
};
//Main Method
$.fn.mask = function(mask,settings) {
settings = $.extend({
placeholder: "_",
completed: null
}, settings);
//Build Regex for format validation
var reString="^";
for(var i=0;i<mask.length;i++)
reString+=(charMap[mask.charAt(i)] || ("\\"+mask.charAt(i)));
reString+="$";
var re = new RegExp(reString);
return this.each(function(){
var input=$(this);
var buffer=new Array(mask.length);
var locked=new Array(mask.length);
//Build buffer layout from mask
for(var i=0;i<mask.length;i++){
locked[i]=charMap[mask.charAt(i)]==null;
buffer[i]=locked[i]?mask.charAt(i):settings.placeholder;
}
/*Event Bindings*/
input.focus(function(){
checkVal();
writeBuffer();
setCaretPosition(this,0);
});
input.blur(checkVal);
//Paste events for IE and Mozilla thanks to Kristinn Sigmundsson
if ($.browser.msie)
this.onpaste= function(){setTimeout(checkVal,0);};
else if ($.browser.mozilla)
this.addEventListener('input',checkVal,false);
var ignore=false; //Variable for ignoring control keys
input.keydown(function(e){
var pos=getCaretPosition(this);
var k = e.keyCode;
ignore=(k < 16 || (k > 16 && k < 32 ) || (k > 32 && k < 41));
//delete selection before proceeding
if((pos.begin-pos.end)!=0 && (!ignore || k==8 || k==46)){
clearBuffer(pos.begin,pos.end);
}
//backspace and delete get special treatment
if(k==8){//backspace
while(pos.begin-->=0){
if(!locked[pos.begin]){
buffer[pos.begin]=settings.placeholder;
if($.browser.opera){
//Opera won't let you cancel the backspace, so we'll let it backspace over a dummy character.
writeBuffer(pos.begin);
setCaretPosition(this,pos.begin+1);
}else{
writeBuffer();
setCaretPosition(this,pos.begin);
}
return false;
}
}
}else if(k==46){//delete
clearBuffer(pos.begin,pos.begin+1);
writeBuffer();
setCaretPosition(this,pos.begin);
return false;
}else if (k==27){
clearBuffer(0,mask.length);
writeBuffer();
setCaretPosition(this,0);
return false;
}
});
input.keypress(function(e){
if(ignore){
ignore=false;
return;
}
e=e||window.event;
var k=e.charCode||e.keyCode||e.which;
var pos=getCaretPosition(this);
var caretPos=pos.begin;
if(e.ctrlKey || e.altKey){//Ignore
return true;
}else if ((k>=41 && k<=122) ||k==32 || k>186){//typeable characters
while(pos.begin<mask.length){
var reString=charMap[mask.charAt(pos.begin)];
var match;
if(reString){
var reChar=new RegExp(reString);
match=String.fromCharCode(k).match(reChar);
}else{//we're on a mask char, go forward and try again
pos.begin+=1;
pos.end=pos.begin;
caretPos+=1;
continue;
}
if(match)
buffer[pos.begin]=String.fromCharCode(k);
else
return false;//reject char
while(++caretPos<mask.length){//seek forward to next typable position
if(!locked[caretPos])
break;
}
break;
}
}else
return false;
writeBuffer();
if(settings.completed && caretPos>=buffer.length)
settings.completed.call(input);
else
setCaretPosition(this,caretPos);
return false;
});
/*Helper Methods*/
function clearBuffer(start,end){
for(var i=start;i<end;i++){
if(!locked[i])
buffer[i]=settings.placeholder;
}
};
function writeBuffer(pos){
var s="";
for(var i=0;i<mask.length;i++){
s+=buffer[i];
if(i==pos)
s+=settings.placeholder;
}
input.val(s);
return s;
};
function checkVal(){
//try to place charcters where they belong
var test=input.val();
var pos=0;
for(var i=0;i<mask.length;i++){
if(!locked[i]){
while(pos++<test.length){
//Regex Test each char here.
var reChar=new RegExp(charMap[mask.charAt(i)]);
if(test.charAt(pos-1).match(reChar)){
buffer[i]=test.charAt(pos-1);
break;
}
}
}
}
var s=writeBuffer();
if(!s.match(re)){
input.val("");
clearBuffer(0,mask.length);
}
};
});
};
})(jQuery);
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