/********************************************************************

* Limit the characters that may be entered in a text field

* Common options: alphanumeric, alphabetic or numeric

* Kevin Sheedy, 2012

* http://github.com/KevinSheedy/jquery.alphanum

*********************************************************************/

(function( $ ){

	// API ///////////////////////////////////////////////////////////////////

	$.fn.alphanum = function(settings) {

		var combinedSettings = getCombinedSettingsAlphaNum(settings);

		var $collection = this;

		setupEventHandlers($collection, trimAlphaNum, combinedSettings);

		return this;

	};

	$.fn.alpha = function(settings) {

		var defaultAlphaSettings = getCombinedSettingsAlphaNum("alpha");

		var combinedSettings = getCombinedSettingsAlphaNum(settings, defaultAlphaSettings);

		var $collection = this;

		setupEventHandlers($collection, trimAlphaNum, combinedSettings);

		return this;

	};

	$.fn.numeric = function(settings) {

		var combinedSettings = getCombinedSettingsNum(settings);

		var $collection = this;

		setupEventHandlers($collection, trimNum, combinedSettings);

		$collection.blur(function(){

			numericField_Blur(this, settings);

		});

		return this;

	};

	// End of API /////////////////////////////////////////////////////////////

	// Start Settings ////////////////////////////////////////////////////////

	var DEFAULT_SETTINGS_ALPHANUM = {

		allow              : '',    // Allow extra characters

		disallow           : '',    // Disallow extra characters

		allowSpace         : true,  // Allow the space character

		allowNumeric       : true,  // Allow digits 0-9

		allowUpper         : true,  // Allow upper case characters

		allowLower         : true,  // Allow lower case characters

		allowCaseless      : true,  // Allow characters that don't have both upper & lower variants - eg Arabic or Chinese

		allowLatin         : true,  // a-z A-Z

		allowOtherCharSets : true,  // eg �, �, Arabic, Chinese etc

		forceUpper         : false, // Convert lower case characters to upper case

		forceLower         : false, // Convert upper case characters to lower case

		maxLength          : NaN    // eg Max Length

	}

	var DEFAULT_SETTINGS_NUM = {

		allowPlus           : false, // Allow the + sign

		allowMinus          : true,  // Allow the - sign

		allowThouSep        : true,  // Allow the thousands separator, default is the comma eg 12,000

		allowDecSep         : true,  // Allow the decimal separator, default is the fullstop eg 3.141

		allowLeadingSpaces  : false,

		maxDigits           : NaN,   // The max number of digits

		maxDecimalPlaces    : NaN,   // The max number of decimal places

		maxPreDecimalPlaces : NaN,   // The max number digits before the decimal point

		max                 : NaN,   // The max numeric value allowed

		min                 : NaN    // The min numeric value allowed

	}

	// Some pre-defined groups of settings for convenience

	var CONVENIENCE_SETTINGS_ALPHANUM = {

		"alpha" : {

			allowNumeric  : false

		},

		"upper" : {

			allowNumeric  : false,

			allowUpper    : true,

			allowLower    : false,

			allowCaseless : true

		},

		"lower" : {

			allowNumeric  : false,

			allowUpper    : false,

			allowLower    : true,

			allowCaseless : true

		}

	};

	// Some pre-defined groups of settings for convenience

	var CONVENIENCE_SETTINGS_NUMERIC = {

		"integer" : {

			allowPlus    : false,

			allowMinus   : true,

			allowThouSep : false,

			allowDecSep  : false

		},

		"positiveInteger" : {

			allowPlus    : false,

			allowMinus   : false,

			allowThouSep : false,

			allowDecSep  : false

		}

	};

	var BLACKLIST   = getBlacklistAscii() + getBlacklistNonAscii();

	var THOU_SEP    = ",";

	var DEC_SEP     = ".";

	var DIGITS      = getDigitsMap();

	var LATIN_CHARS = getLatinCharsSet();

	// Return the blacklisted special chars that are encodable using 7-bit ascii

	function getBlacklistAscii(){

		var blacklist = '!@#$%^&*()+=[]\\\';,/{}|":<>?~`.-_';

		blacklist += " "; // 'Space' is on the blacklist but can be enabled using the 'allowSpace' config entry

		return blacklist;

	}

	// Return the blacklisted special chars that are NOT encodable using 7-bit ascii

	// We want this .js file to be encoded using 7-bit ascii so it can reach the widest possible audience

	// Higher order chars must be escaped eg "\xAC"

	// Not too worried about comments containing higher order characters for now (let's wait and see if it becomes a problem)

	function getBlacklistNonAscii(){

		var blacklist = 

			  "\xAC"     // �

			+ "\u20AC"   // �

			+ "\xA3"     // �

			+ "\xA6"     // �

			;

		return blacklist;

	}

	// End Settings ////////////////////////////////////////////////////////

	// Implementation details go here ////////////////////////////////////////////////////////

	function setupEventHandlers($textboxes, trimFunction, settings) {

		$textboxes.each(function(){

			var $textbox = $(this);

			$textbox.bind("keyup change paste", function(e){

				var pastedText = "";

				if(e.originalEvent && e.originalEvent.clipboardData && e.originalEvent.clipboardData.getData)

					pastedText = e.originalEvent.clipboardData.getData("text/plain")

				// setTimeout is necessary for handling the 'paste' event

				setTimeout(function(){

					trimTextbox($textbox, trimFunction, settings, pastedText);

				}, 0);

			});

			$textbox.bind("keypress", function(e){

				// Determine which key is pressed.

				// If it's a control key, then allow the event's default action to occur eg backspace, tab

				var charCode = !e.charCode ? e.which : e.charCode;

				if(isControlKey(charCode)

					|| e.ctrlKey

					|| e.metaKey ) // cmd on MacOS

					return;

				var newChar         = String.fromCharCode(charCode);

				// Determine if some text was selected / highlighted when the key was pressed

				var selectionObject = $textbox.selection();

				var start = selectionObject.start;

				var end   = selectionObject.end;

				var textBeforeKeypress  = $textbox.val();

				// The new char may be inserted:

				//  1) At the start

				//  2) In the middle

				//  3) At the end

				//  4) User highlights some text and then presses a key which would replace the highlighted text

				//

				// Here we build the string that would result after the keypress.

				// If the resulting string is invalid, we cancel the event.

				// Unfortunately, it isn't enough to just check if the new char is valid because some chars

				// are position sensitive eg the decimal point '.'' or the minus sign '-'' are only valid in certain positions.

				var potentialTextAfterKeypress = textBeforeKeypress.substring(0, start) + newChar + textBeforeKeypress.substring(end);

				var validatedText              = trimFunction(potentialTextAfterKeypress, settings);

				// If the keypress would cause the textbox to contain invalid characters, then cancel the keypress event

				if(validatedText != potentialTextAfterKeypress)

					e.preventDefault();

			});

		});

	}

	// Ensure the text is a valid number when focus leaves the textbox

	// This catches the case where a user enters '-' or '.' without entering any digits

	function numericField_Blur(inputBox, settings) {

		var fieldValueNumeric = parseFloat($(inputBox).val());

		var $inputBox = $(inputBox);

		if(isNaN(fieldValueNumeric)) {

			$inputBox.val("");

			return;

		}

		if(isNumeric(settings.min) && fieldValueNumeric < settings.min)

			$inputBox.val("");

		if(isNumeric(settings.max) && fieldValueNumeric > settings.max)

			$inputBox.val("");

	}

	function isNumeric(value) {

		return !isNaN(value);

	}

	function isControlKey(charCode) {

		if(charCode >= 32)

			return false;

		if(charCode == 10)

			return false;

		if(charCode == 13)

			return false;

		return true;

	}

	// One way to prevent a character being entered is to cancel the keypress event.

	// However, this gets messy when you have to deal with things like copy paste which isn't a keypress.

	// Which event gets fired first, keypress or keyup? What about IE6 etc etc?

	// Instead, it's easier to allow the 'bad' character to be entered and then to delete it immediately after.

	function trimTextbox($textBox, trimFunction, settings, pastedText){

		var inputString = $textBox.val();

		if(inputString == "" && pastedText.length > 0)

			inputString = pastedText;

		var outputString = trimFunction(inputString, settings);

		if(inputString == outputString)

			return;

		var caretPos = $textBox.alphanum_caret();

		$textBox.val(outputString);

		//Reset the caret position

		if(inputString.length ==(outputString.length + 1))

			$textBox.alphanum_caret(caretPos - 1);

		else

			$textBox.alphanum_caret(caretPos);

	}

	function getCombinedSettingsAlphaNum(settings, defaultSettings){

		if(typeof defaultSettings == "undefined")

			defaultSettings = DEFAULT_SETTINGS_ALPHANUM;

		var userSettings, combinedSettings = {};

		if(typeof settings === "string")

			userSettings = CONVENIENCE_SETTINGS_ALPHANUM[settings];

		else if(typeof settings == "undefined")

			userSettings = {};

		else

			userSettings = settings;

		$.extend(combinedSettings, defaultSettings, userSettings);

		if(typeof combinedSettings.blacklist == 'undefined')

			combinedSettings.blacklistSet = getBlacklistSet(combinedSettings.allow, combinedSettings.disallow);

		return combinedSettings;

	}

	function getCombinedSettingsNum(settings){

		var userSettings, combinedSettings = {};

		if(typeof settings === "string")

			userSettings = CONVENIENCE_SETTINGS_NUMERIC[settings];

		else if(typeof settings == "undefined")

			userSettings = {};

		else

			userSettings = settings;

		$.extend(combinedSettings, DEFAULT_SETTINGS_NUM, userSettings);

		return combinedSettings;

	}

	// This is the heart of the algorithm

	function alphanum_allowChar(validatedStringFragment, Char, settings){

		if(settings.maxLength && validatedStringFragment.length >= settings.maxLength)

			return false;

		if(settings.allow.indexOf(Char) >=0 )

			return true;

		if(settings.allowSpace && (Char == " "))

			return true;

		if(settings.blacklistSet.contains(Char))

			return false;

		if(!settings.allowNumeric && DIGITS[Char])

			return false;

		if(!settings.allowUpper && isUpper(Char))

			return false;

		if(!settings.allowLower && isLower(Char))

			return false;

		if(!settings.allowCaseless && isCaseless(Char))

			return false;

		if(!settings.allowLatin && LATIN_CHARS.contains(Char))

			return false;

		if(!settings.allowOtherCharSets){

			if(DIGITS[Char] || LATIN_CHARS.contains(Char))

				return true;

			else

				return false;

		}

		return true;

	}

	function numeric_allowChar(validatedStringFragment, Char, settings){

		if(DIGITS[Char]) {

			if(isMaxDigitsReached(validatedStringFragment, settings))

				return false;

			if(isMaxPreDecimalsReached(validatedStringFragment, settings))

				return false;

			if(isMaxDecimalsReached(validatedStringFragment, settings))

				return false;

			if(isGreaterThanMax(validatedStringFragment + Char, settings))

				return false;

			if(isLessThanMin(validatedStringFragment + Char, settings))

				return false;

			return true;

		}

		if(settings.allowPlus && Char == '+' && validatedStringFragment == '')

			return true;

		if(settings.allowMinus && Char == '-' && validatedStringFragment == '')

			return true;

		if(Char == THOU_SEP && settings.allowThouSep && allowThouSep(validatedStringFragment, Char))

			return true;

		if(Char == DEC_SEP) {

			// Only one decimal separator allowed

			if(validatedStringFragment.indexOf(DEC_SEP) >= 0)

				return false;

			if(settings.allowDecSep)

				return true;

		}

		return false;

	}

	function countDigits(string) {

		// Error handling, nulls etc

		string = string + "";

		// Count the digits

		return string.replace(/[^0-9]/g,"").length;

	}

	function isMaxDigitsReached(string, settings) {

		var maxDigits = settings.maxDigits;

		if(maxDigits == "" || isNaN(maxDigits))

			return false; // In this case, there is no maximum

		var numDigits = countDigits(string);

		if(numDigits >= maxDigits)

			return true;

		return false;

	}

	function isMaxDecimalsReached(string, settings) {

		var maxDecimalPlaces = settings.maxDecimalPlaces;

		if(maxDecimalPlaces == "" || isNaN(maxDecimalPlaces))

			return false; // In this case, there is no maximum

		var indexOfDecimalPoint = string.indexOf(DEC_SEP);

		if(indexOfDecimalPoint == -1)

			return false;

		var decimalSubstring = string.substring(indexOfDecimalPoint);

		var numDecimals = countDigits(decimalSubstring);

		if(numDecimals >= maxDecimalPlaces)

			return true;

		return false;

	}

	function isMaxPreDecimalsReached(string, settings) {

		var maxPreDecimalPlaces = settings.maxPreDecimalPlaces;

		if(maxPreDecimalPlaces == "" || isNaN(maxPreDecimalPlaces))

			return false; // In this case, there is no maximum

		var indexOfDecimalPoint = string.indexOf(DEC_SEP);

		if(indexOfDecimalPoint >= 0)

			return false;

		var numPreDecimalDigits = countDigits(string);

		if(numPreDecimalDigits >= maxPreDecimalPlaces)

			return true;

		return false;

	}

	function isGreaterThanMax(numericString, settings) {

		if(!settings.max || settings.max < 0)

			return false;

		var outputNumber = parseFloat(numericString);

		if(outputNumber > settings.max)

			return true;

		return false;

	}

	function isLessThanMin(numericString, settings) {

		if(!settings.min || settings.min > 0)

			return false;

		var outputNumber = parseFloat(numericString);

		if(outputNumber < settings.min)

			return true;

		return false;

	}

	/********************************

	 * Trims a string according to the settings provided

	 ********************************/

	function trimAlphaNum(inputString, settings){

		if(typeof inputString != "string")

			return inputString;

		var inChars = inputString.split("");

		var outChars = [];

		var i = 0;

		var Char;

		for(i=0; i<inChars.length; i++){

			Char = inChars[i];

			var validatedStringFragment = outChars.join("");

			if(alphanum_allowChar(validatedStringFragment, Char, settings))

				outChars.push(Char);

		}

		var outputString = outChars.join("");

		if(settings.forceLower) 

			outputString = outputString.toLowerCase();

		else if(settings.forceUpper)

			outputString = outputString.toUpperCase();

		return outputString;

	}

	function trimNum(inputString, settings){

		if(typeof inputString != "string")

			return inputString;

		var inChars = inputString.split("");

		var outChars = [];

		var i = 0;

		var Char;

		for(i=0; i<inChars.length; i++){

			Char = inChars[i];

			var validatedStringFragment = outChars.join("");

			if(numeric_allowChar(validatedStringFragment, Char, settings))

				outChars.push(Char);

		}

		return outChars.join("");

	}

	function removeUpperCase(inputString){

		var charArray = inputString.split('');

		var i = 0;

		var outputArray = [];

		var Char;

		for(i=0; i<charArray.length; i++){

			Char = charArray[i];

		}

	}

	function removeLowerCase(inputString){

	}

	function isUpper(Char){

		var upper = Char.toUpperCase();

		var lower = Char.toLowerCase();

		if( (Char == upper) && (upper != lower))

			return true;

		else

			return false;

	}

	function isLower(Char){

		var upper = Char.toUpperCase();

		var lower = Char.toLowerCase();

		if( (Char == lower) && (upper != lower))

			return true;

		else

			return false;

	}

	function isCaseless(Char){

		if(Char.toUpperCase() == Char.toLowerCase())

			return true;

		else

			return false;

	}

	function getBlacklistSet(allow, disallow){

		var setOfBadChars  = new Set(BLACKLIST + disallow);

		var setOfGoodChars = new Set(allow);

		var blacklistSet   = setOfBadChars.subtract(setOfGoodChars);

		return blacklistSet;

	}

	function getDigitsMap(){

		var array = "0123456789".split("");

		var map = {};

		var i = 0;

		var digit;

		for(i=0; i<array.length; i++){

			digit = array[i];

			map[digit] = true;

		}

		return map;

	}

	function getLatinCharsSet(){

		var lower = "abcdefghijklmnopqrstuvwxyz";

		var upper = lower.toUpperCase();

		var azAZ = new Set(lower + upper);

		return azAZ;

	}

	function allowThouSep(currentString, Char) {

		// Can't start with a THOU_SEP

		if(currentString.length == 0)

			return false;

		// Can't have a THOU_SEP anywhere after a DEC_SEP

		var posOfDecSep = currentString.indexOf(DEC_SEP);

		if(posOfDecSep >= 0)

			return false;

		var posOfFirstThouSep       = currentString.indexOf(THOU_SEP);

		// Check if this is the first occurrence of a THOU_SEP

		if(posOfFirstThouSep < 0)

			return true;

		var posOfLastThouSep        = currentString.lastIndexOf(THOU_SEP);

		var charsSinceLastThouSep   = currentString.length - posOfLastThouSep - 1;

		// Check if there has been 3 digits since the last THOU_SEP

		if(charsSinceLastThouSep < 3)

			return false;

		var digitsSinceFirstThouSep = countDigits(currentString.substring(posOfFirstThouSep));

		// Check if there has been a multiple of 3 digits since the first THOU_SEP

		if((digitsSinceFirstThouSep % 3) > 0)

			return false;

		return true;

	}

	////////////////////////////////////////////////////////////////////////////////////

	// Implementation of a Set

	////////////////////////////////////////////////////////////////////////////////////

	function Set(elems){

		if(typeof elems == "string")

			this.map = stringToMap(elems);

		else

			this.map = {};

	}

	Set.prototype.add = function(set){

		var newSet = this.clone();

		for(var key in set.map)

			newSet.map[key] = true;

		return newSet;

	}

	Set.prototype.subtract = function(set){

		var newSet = this.clone();

		for(var key in set.map)

			delete newSet.map[key];

		return newSet;

	}

	Set.prototype.contains = function(key){

		if(this.map[key])

			return true;

		else

			return false;

	}

	Set.prototype.clone = function(){

		var newSet = new Set();

		for(var key in this.map)

			newSet.map[key] = true;

		return newSet;

	}

	////////////////////////////////////////////////////////////////////////////////////

	function stringToMap(string){

		var map = {};

		var array = string.split("");

		var i=0;

		var Char;

		for(i=0; i<array.length; i++){

			Char = array[i];

			map[Char] = true;

		}

		return map;

	}

	// Backdoor for testing

	$.fn.alphanum.backdoorAlphaNum = function(inputString, settings){

		var combinedSettings = getCombinedSettingsAlphaNum(settings);

		return trimAlphaNum(inputString, combinedSettings);

	};

	$.fn.alphanum.backdoorNumeric = function(inputString, settings){

		var combinedSettings = getCombinedSettingsNum(settings);

		return trimNum(inputString, combinedSettings);

	};

	$.fn.alphanum.setNumericSeparators = function(settings) {

		if(settings.thousandsSeparator.length != 1)

			return;

		if(settings.decimalSeparator.length != 1)

			return;

		THOU_SEP = settings.thousandsSeparator;

		DEC_SEP = settings.decimalSeparator;

	}

})( jQuery );

//Include the 3rd party lib: jquery.caret.js

// Set caret position easily in jQuery

// Written by and Copyright of Luke Morton, 2011

// Licensed under MIT

(function ($) {

	// Behind the scenes method deals with browser

	// idiosyncrasies and such

	function caretTo(el, index) {

		if (el.createTextRange) { 

			var range = el.createTextRange(); 

			range.move("character", index); 

			range.select(); 

		} else if (el.selectionStart != null) { 

			el.focus(); 

			el.setSelectionRange(index, index); 

		}

	};

	// Another behind the scenes that collects the

	// current caret position for an element

	// TODO: Get working with Opera

	function caretPos(el) {

		if ("selection" in document) {

			var range = el.createTextRange();

			try {

				range.setEndPoint("EndToStart", document.selection.createRange());

			} catch (e) {

				// Catch IE failure here, return 0 like

				// other browsers

				return 0;

			}

			return range.text.length;

		} else if (el.selectionStart != null) {

			return el.selectionStart;

		}

	};

	// The following methods are queued under fx for more

	// flexibility when combining with $.fn.delay() and

	// jQuery effects.

	// Set caret to a particular index

	$.fn.alphanum_caret = function (index, offset) {

		if (typeof(index) === "undefined") {

			return caretPos(this.get(0));

		}

		return this.queue(function (next) {

			if (isNaN(index)) {

				var i = $(this).val().indexOf(index);

				if (offset === true) {

					i += index.length;

				} else if (typeof(offset) !== "undefined") {

					i += offset;

				}

				caretTo(this, i);

			} else {

				caretTo(this, index);

			}

			next();

		});

	};

}(jQuery));

/**********************************************************

* Selection Library

* Used to determine what text is highlighted in the textbox before a key is pressed.

* http://donejs.com/docs.html#!jQuery.fn.selection

* https://github.com/jupiterjs/jquerymx/blob/master/dom/selection/selection.js

***********************************************************/

(function(e){var t=function(e){return e.replace(/([a-z])([a-z]+)/gi,function(e,t,n){return t+n.toLowerCase()}).replace(/_/g,"")},n=function(e){return e.replace(/^([a-z]+)_TO_([a-z]+)/i,function(e,t,n){return n+"_TO_"+t})},r=function(e){return e?e.ownerDocument.defaultView||e.ownerDocument.parentWindow:window},i=function(t,n){var r=e.Range.current(t).clone(),i=e.Range(t).select(t);if(!r.overlaps(i)){return null}if(r.compare("START_TO_START",i)<1){startPos=0;r.move("START_TO_START",i)}else{fromElementToCurrent=i.clone();fromElementToCurrent.move("END_TO_START",r);startPos=fromElementToCurrent.toString().length}if(r.compare("END_TO_END",i)>=0){endPos=i.toString().length}else{endPos=startPos+r.toString().length}return{start:startPos,end:endPos}},s=function(t){var n=r(t);if(t.selectionStart!==undefined){if(document.activeElement&&document.activeElement!=t&&t.selectionStart==t.selectionEnd&&t.selectionStart==0){return{start:t.value.length,end:t.value.length}}return{start:t.selectionStart,end:t.selectionEnd}}else if(n.getSelection){return i(t,n)}else{try{if(t.nodeName.toLowerCase()=="input"){var s=r(t).document.selection.createRange(),o=t.createTextRange();o.setEndPoint("EndToStart",s);var u=o.text.length;return{start:u,end:u+s.text.length}}else{var a=i(t,n);if(!a){return a}var f=e.Range.current().clone(),l=f.clone().collapse().range,c=f.clone().collapse(false).range;l.moveStart("character",-1);c.moveStart("character",-1);if(a.startPos!=0&&l.text==""){a.startPos+=2}if(a.endPos!=0&&c.text==""){a.endPos+=2}return a}}catch(h){return{start:t.value.length,end:t.value.length}}}},o=function(e,t,n){var i=r(e);if(e.setSelectionRange){if(n===undefined){e.focus();e.setSelectionRange(t,t)}else{e.select();e.selectionStart=t;e.selectionEnd=n}}else if(e.createTextRange){var s=e.createTextRange();s.moveStart("character",t);n=n||t;s.moveEnd("character",n-e.value.length);s.select()}else if(i.getSelection){var o=i.document,u=i.getSelection(),f=o.createRange(),l=[t,n!==undefined?n:t];a([e],l);f.setStart(l[0].el,l[0].count);f.setEnd(l[1].el,l[1].count);u.removeAllRanges();u.addRange(f)}else if(i.document.body.createTextRange){var f=document.body.createTextRange();f.moveToElementText(e);f.collapse();f.moveStart("character",t);f.moveEnd("character",n!==undefined?n:t);f.select()}},u=function(e,t,n,r){if(typeof n[0]==="number"&&n[0]<t){n[0]={el:r,count:n[0]-e}}if(typeof n[1]==="number"&&n[1]<=t){n[1]={el:r,count:n[1]-e};}},a=function(e,t,n){var r,i;n=n||0;for(var s=0;e[s];s++){r=e[s];if(r.nodeType===3||r.nodeType===4){i=n;n+=r.nodeValue.length;u(i,n,t,r)}else if(r.nodeType!==8){n=a(r.childNodes,t,n)}}return n};jQuery.fn.selection=function(e,t){if(e!==undefined){return this.each(function(){o(this,e,t)})}else{return s(this[0])}};e.fn.selection.getCharElement=a})(jQuery)