/*
* @Copyright (c) 2010 Aurélio Saraiva, Diego Plentz
* @Page http://github.com/plentz/jquery-maskmoney
* try at http://inoveideia.com.br/maskInputMoney/

* 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: 0.9
* @Release: 2011-01-10
*/
(function($) {
$.fn.maskMoney = function(settings) {
settings = $.extend({
symbol:'US$',
decimal:'.',
precision:2,
thousands:',',
allowZero:false,
allowNegative:false,
showSymbol:false,
symbolStay:false,
defaultZero:true
}, settings);

return this.each(function() {
var input = $(this);

function keypressEvent(e) {
e = e||window.event;
var k = e.charCode||e.keyCode||e.which;
if (k == undefined) return false; //needed to handle an IE "special" event

if (k<48||k>57) { // any key except the numbers 0-9
if (k==45) { // -(minus) key
input.val(changeSign(input));
return false;
}
if (k==43) { // +(plus) key
input.val(input.val().replace('-',''));
return false;
} else if (k==13) { // enter key
return true;
} else { // any other key with keycode less than 48 and greater than 57
preventDefault(e);
return true;
}
} else if (input.val().length==input.attr('maxlength')) {
return false;
} else {
preventDefault(e);

var key = String.fromCharCode(k);
var x = input.get(0);
var selection = input.getInputSelection(x);
var startPos = selection.start;
var endPos = selection.end;
x.value = x.value.substring(0, startPos) + key + x.value.substring(endPos, x.value.length);
maskAndPosition(x, startPos + 1);
return false;
}
}

function keydownEvent(e) {
e = e||window.event;
var k = e.charCode||e.keyCode||e.which;
if (k == undefined) return false; //needed to handle an IE "special" event

var x = input.get(0);
var selection = input.getInputSelection(x);
var startPos = selection.start;
var endPos = selection.end;

if (k==8) { // backspace key
preventDefault(e);

if(startPos == endPos)
{
// Remove single character
x.value = x.value.substring(0, startPos - 1) + x.value.substring(endPos, x.value.length);
startPos = startPos - 1;
}
else
{
// Remove multiple characters
x.value = x.value.substring(0, startPos) + x.value.substring(endPos, x.value.length);
}
maskAndPosition(x, startPos);
return false;
} else if (k==9) { // tab key
return true;
} else if (k==46||k==63272) { // delete key (with special case for safari)
preventDefault(e);
if(x.selectionStart == x.selectionEnd)
{
// Remove single character
x.value = x.value.substring(0, startPos) + x.value.substring(endPos + 1, x.value.length);
}
else
{
//Remove multiple characters
x.value = x.value.substring(0, startPos) + x.value.substring(endPos, x.value.length);
}
maskAndPosition(x, startPos);
return false;
} else { // any other key
return true;
}
}

function focusEvent(e) {
if (input.val()==''&&settings.defaultZero) {
input.val(setSymbol(getDefaultMask()));
} else {
input.val(setSymbol(input.val()));
}
                if (this.createTextRange) {
                    var textRange = this.createTextRange();
                    textRange.collapse(false); // set the cursor at the end of the input
                    textRange.select();
                }
}

function blurEvent(e) {
                if ($.browser.msie) {
                    keypressEvent(e);
                }

if (input.val()==setSymbol(getDefaultMask())) {
if(!settings.allowZero) input.val('');
} else {
if (!settings.symbolStay) input.val(input.val().replace(settings.symbol,''));
else if (settings.symbolStay&&input.val()==settings.symbol) input.val('');
}
}

function preventDefault(e) {
if (e.preventDefault) { //standard browsers
e.preventDefault();
} else { // internet explorer
e.returnValue = false
}
}

function maskAndPosition(x, startPos) {
var originalLen = input.val().length;
input.val(maskValue(x.value));
var newLen = input.val().length;
startPos = startPos - (originalLen - newLen);
input.setCursorPosition(startPos);
}

function maskValue(v) {
v = v.replace(settings.symbol,'');

var strCheck = '0123456789';
var len = v.length;
var a = '', t = '', neg='';

if(len!=0 && v.charAt(0)=='-'){
v = v.replace('-','');
if(settings.allowNegative){
neg = '-';
}
}

if (len==0) {
if (!settings.defaultZero) return t;
t = '0.00';
}

for (var i = 0; i<len; i++) {
if ((v.charAt(i)!='0') && (v.charAt(i)!=settings.decimal)) break;
                }

for (; i<len; i++) {
if (strCheck.indexOf(v.charAt(i))!=-1) a+= v.charAt(i);
}

var n = parseFloat(a);
n = isNaN(n) ? 0 : n/Math.pow(10,settings.precision);
t = n.toFixed(settings.precision);

                i = settings.precision == 0 ? 0 : 1;
var p, d = (t=t.split('.'))[i].substr(0,settings.precision);
for (p = (t=t[0]).length; (p-=3)>=1;) {
t = t.substr(0,p)+settings.thousands+t.substr(p);
}

return (settings.precision>0)
                    ? setSymbol(neg+t+settings.decimal+d+Array((settings.precision+1)-d.length).join(0))
                    : setSymbol(neg+t);
}

function getDefaultMask() {
var n = parseFloat('0')/Math.pow(10,settings.precision);
return (n.toFixed(settings.precision)).replace(new RegExp('\\.','g'),settings.decimal);
}

function setSymbol(v) {
if (settings.showSymbol) {
if (v.substr(0, settings.symbol.length) != settings.symbol) return settings.symbol+v;
}
return v;
}

function changeSign(i){
if (settings.allowNegative) {
var vic = i.val();
if (i.val()!='' && i.val().charAt(0)=='-'){
return i.val().replace('-','');
} else{
return '-'+i.val();
}
} else {
return i.val();
}
}

input.bind('keypress',keypressEvent);
input.bind('keydown',keydownEvent);
input.bind('blur',blurEvent);
input.bind('focus',focusEvent);

input.one('unmaskMoney',function() {
input.unbind('focus',focusEvent);
input.unbind('blur',blurEvent);
input.unbind('keydown',keydownEvent);
input.unbind('keypress',keypressEvent);

if ($.browser.msie) {
                    this.onpaste= null;
} else if ($.browser.mozilla) {
                    this.removeEventListener('input',blurEvent,false);
                }
});
});
}

$.fn.unmaskMoney=function() {
return this.trigger('unmaskMoney');
};

$.fn.setCursorPosition = function(pos) {
this.each(function(index, elem) {
if (elem.setSelectionRange) {
elem.focus();
elem.setSelectionRange(pos, pos);
} else if (elem.createTextRange) {
var range = elem.createTextRange();
range.collapse(true);
range.moveEnd('character', pos);
range.moveStart('character', pos);
range.select();
}
});
return this;
};

$.fn.getInputSelection = function(el) {
var start = 0, end = 0, normalizedValue, range, textInputRange, len, endRange;

if (typeof el.selectionStart == "number" && typeof el.selectionEnd == "number") {
start = el.selectionStart;
end = el.selectionEnd;
} else {
range = document.selection.createRange();

if (range && range.parentElement() == el) {
len = el.value.length;
normalizedValue = el.value.replace(/\r\n/g, "\n");

// Create a working TextRange that lives only in the input
textInputRange = el.createTextRange();
textInputRange.moveToBookmark(range.getBookmark());

// Check if the start and end of the selection are at the very end
// of the input, since moveStart/moveEnd doesn't return what we want
// in those cases
endRange = el.createTextRange();
endRange.collapse(false);

if (textInputRange.compareEndPoints("StartToEnd", endRange) > -1) {
start = end = len;
} else {
start = -textInputRange.moveStart("character", -len);
start += normalizedValue.slice(0, start).split("\n").length - 1;

if (textInputRange.compareEndPoints("EndToEnd", endRange) > -1) {
end = len;
} else {
end = -textInputRange.moveEnd("character", -len);
end += normalizedValue.slice(0, end).split("\n").length - 1;
}
}
}
}

return {
start: start,
end: end
};
}

})(jQuery);