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Editing: jquery.maskedinput.js

/*
 Masked Input plugin for jQuery
 Copyright (c) 2007-2013 Josh Bush (digitalbush.com)
 Licensed under the MIT license (http://digitalbush.com/projects/masked-input-plugin/#license)
 Version: 1.4.1
 Source: https://github.com/RubtsovAV/jquery.maskedinput/blob/master/src/jquery.maskedinput.js
 Updated 26 June 2017
 - Fixed bug with caret position on Android
 */
(function (factory) {
	if (typeof define === 'function' && define.amd) {
		// AMD. Register as an anonymous module.
		define(['jquery'], factory);
	} else if (typeof exports === 'object') {
		// Node/CommonJS
		factory(require('jquery'));
	} else {
		// Browser globals
		factory(jQuery);
	}
}(function ($) {

var ua = navigator.userAgent,
		iPhone = /iphone/i.test(ua),
		chrome = /chrome/i.test(ua),
		android = /android/i.test(ua),
		caretTimeoutId;

$.mask = {
		//Predefined character definitions
		definitions: {
			'9': "[0-9]",
			'a': "[A-Za-z]",
			'*': "[A-Za-z0-9]"
		},
		autoclear: true,
		dataName: "rawMaskFn",
		placeholder: '_'
	};

$.fn.extend({
		//Helper Function for Caret positioning
		caret: function(begin, end) {
			var range;

if (this.length === 0 || this.is(":hidden") || this.get(0) !== document.activeElement) {
				return;
			}

if (typeof begin == 'number') {
				end = (typeof end === 'number') ? end : begin;
				return this.each(function() {
					if (this.setSelectionRange) {
						this.setSelectionRange(begin, end);
					} else if (this.createTextRange) {
						range = this.createTextRange();
						range.collapse(true);
						range.moveEnd('character', end);
						range.moveStart('character', begin);
						range.select();
					}
				});
			} else {
				if (this[0].setSelectionRange) {
					begin = this[0].selectionStart;
					end = this[0].selectionEnd;
				} else if (document.selection && document.selection.createRange) {
					range = document.selection.createRange();
					begin = 0 - range.duplicate().moveStart('character', -100000);
					end = begin + range.text.length;
				}
				return { begin: begin, end: end };
			}
		},
		unmask: function() {
			return this.trigger("unmask");
		},
		mask: function(mask, settings) {
			var input,
				defs,
				tests,
				partialPosition,
				firstNonMaskPos,
				lastRequiredNonMaskPos,
				len,
				oldVal;

if (!mask && this.length > 0) {
				input = $(this[0]);
				var fn = input.data($.mask.dataName)
				return fn?fn():undefined;
			}

settings = $.extend({
				autoclear: $.mask.autoclear,
				placeholder: $.mask.placeholder, // Load default placeholder
				completed: null
			}, settings);

defs = $.mask.definitions;
			tests = [];
			partialPosition = len = mask.length;
			firstNonMaskPos = null;

mask = String(mask);

$.each(mask.split(""), function(i, c) {
				if (c == '?') {
					len--;
					partialPosition = i;
				} else if (defs[c]) {
					tests.push(new RegExp(defs[c]));
					if (firstNonMaskPos === null) {
						firstNonMaskPos = tests.length - 1;
					}
					if(i < partialPosition){
						lastRequiredNonMaskPos = tests.length - 1;
					}
				} else {
					tests.push(null);
				}
			});

return this.trigger("unmask").each(function() {
				var input = $(this),
					buffer = $.map(
						mask.split(""),
						function(c, i) {
							if (c != '?') {
								return defs[c] ? getPlaceholder(i) : c;
							}
						}),
					defaultBuffer = buffer.join(''),
					focusText = input.val();

function tryFireCompleted(){
					if (!settings.completed) {
						return;
					}

for (var i = firstNonMaskPos; i <= lastRequiredNonMaskPos; i++) {
						if (tests[i] && buffer[i] === getPlaceholder(i)) {
							return;
						}
					}
					settings.completed.call(input);
				}

function getPlaceholder(i){
					if(i < settings.placeholder.length)
						return settings.placeholder.charAt(i);
					return settings.placeholder.charAt(0);
				}

function seekNext(pos) {
					while (++pos < len && !tests[pos]);
					return pos;
				}

function seekPrev(pos) {
					while (--pos >= 0 && !tests[pos]);
					return pos;
				}

function shiftL(begin,end) {
					var i,
						j;

if (begin<0) {
						return;
					}

for (i = begin, j = seekNext(end); i < len; i++) {
						if (tests[i]) {
							if (j < len && tests[i].test(buffer[j])) {
								buffer[i] = buffer[j];
								buffer[j] = getPlaceholder(j);
							} else {
								break;
							}

j = seekNext(j);
						}
					}
					writeBuffer();
					input.caret(Math.max(firstNonMaskPos, begin));
				}

function shiftR(pos) {
					var i,
						c,
						j,
						t;

for (i = pos, c = getPlaceholder(pos); i < len; i++) {
						if (tests[i]) {
							j = seekNext(i);
							t = buffer[i];
							buffer[i] = c;
							if (j < len && tests[j].test(t)) {
								c = t;
							} else {
								break;
							}
						}
					}
				}

function androidInputEvent(e) {
					var curVal = input.val();
					var pos = input.caret();

var proxy = function () {
						$.proxy($.fn.caret, input, pos.begin, pos.begin)();
					};

if (oldVal && oldVal.length && oldVal.length > curVal.length ) {
						// a deletion or backspace happened
						checkVal(true);
						while (pos.begin > 0 && !tests[pos.begin-1])
							pos.begin--;
						if (pos.begin === 0)
						{
							while (pos.begin < firstNonMaskPos && !tests[pos.begin])
								pos.begin++;
						}
						setTimeout(proxy, 0);
					} else {
						var pos2 = checkVal(true);
						var lastEnteredValue = curVal.charAt(pos.begin);
						if (pos.begin < len){
							if (!tests[pos.begin]) {
								pos.begin = pos2;
							} else {
								if(tests[pos.begin].test(lastEnteredValue)){
									pos.begin++;
								}
							}
						}
						setTimeout(proxy, 0);
					}
					tryFireCompleted();
				}

function blurEvent(e) {
					checkVal();

if (input.val() != focusText)
						input.change();
				}

function keydownEvent(e) {
					if (input.prop("readonly")){
						return;
					}

var k = e.which || e.keyCode,
						pos,
						begin,
						end;
					oldVal = input.val();
					//backspace, delete, and escape get special treatment
					if (k === 8 || k === 46 || (iPhone && k === 127)) {
						pos = input.caret();
						begin = pos.begin;
						end = pos.end;

if (end - begin === 0) {
							begin=k!==46?seekPrev(begin):(end=seekNext(begin-1));
							end=k===46?seekNext(end):end;
						}
						clearBuffer(begin, end);
						shiftL(begin, end - 1);

e.preventDefault();
					} else if( k === 13 ) { // enter
						blurEvent.call(this, e);
					} else if (k === 27) { // escape
						input.val(focusText);
						input.caret(0, checkVal());
						e.preventDefault();
					}
				}

function keypressEvent(e) {
					if (input.prop("readonly")){
						return;
					}

var k = e.which || e.keyCode,
						pos = input.caret(),
						p,
						c,
						next;

if (e.ctrlKey || e.altKey || e.metaKey || k < 32) {//Ignore
						return;
					} else if ( k && k !== 13 ) {
						if (pos.end - pos.begin !== 0){
							clearBuffer(pos.begin, pos.end);
							shiftL(pos.begin, pos.end-1);
						}

p = seekNext(pos.begin - 1);
						if (p < len) {
							c = String.fromCharCode(k);
							if (tests[p].test(c)) {
								shiftR(p);

buffer[p] = c;
								writeBuffer();
								next = seekNext(p);

if(android){
									//Path for CSP Violation on FireFox OS 1.1
									var proxy = function() {
										$.proxy($.fn.caret,input,next)();
									};

setTimeout(proxy,0);
								}else{
									input.caret(next);
								}
								if(pos.begin <= lastRequiredNonMaskPos){
									tryFireCompleted();
								}
							}
						}
						e.preventDefault();
					}
				}

function clearBuffer(start, end) {
					var i;
					for (i = start; i < end && i < len; i++) {
						if (tests[i]) {
							buffer[i] = getPlaceholder(i);
						}
					}
				}

function writeBuffer() { input.val(buffer.join('')); }

function checkVal(allow) {
					//try to place characters where they belong
					var test = input.val(),
						lastMatch = -1,
						i,
						c,
						pos;

for (i = 0, pos = 0; i < len; i++) {
						if (tests[i]) {
							buffer[i] = getPlaceholder(i);
							while (pos++ < test.length) {
								c = test.charAt(pos - 1);
								if (tests[i].test(c)) {
									buffer[i] = c;
									lastMatch = i;
									break;
								}
							}
							if (pos > test.length) {
								clearBuffer(i + 1, len);
								break;
							}
						} else {
							if (buffer[i] === test.charAt(pos)) {
								pos++;
							}
							if( i < partialPosition){
								lastMatch = i;
							}
						}
					}
					if (allow) {
						writeBuffer();
					} else if (lastMatch + 1 < partialPosition) {
						if (settings.autoclear || buffer.join('') === defaultBuffer) {
							// Invalid value. Remove it and replace it with the
							// mask, which is the default behavior.
							if(input.val()) input.val("");
							clearBuffer(0, len);
						} else {
							// Invalid value, but we opt to show the value to the
							// user and allow them to correct their mistake.
							writeBuffer();
						}
					} else {
						writeBuffer();
						input.val(input.val().substring(0, lastMatch + 1));
					}
					return (partialPosition ? i : firstNonMaskPos);
				}

input.data($.mask.dataName,function(){
					return $.map(buffer, function(c, i) {
						return tests[i]&&c!=getPlaceholder(i) ? c : null;
					}).join('');
				});

input
					.one("unmask", function() {
						input
							.off(".mask")
							.removeData($.mask.dataName);
					})
					.on("focus.mask", function() {
						if (input.prop("readonly")){
							return;
						}

clearTimeout(caretTimeoutId);
						var pos;

focusText = input.val();

pos = checkVal();

caretTimeoutId = setTimeout(function(){
							if(input.get(0) !== document.activeElement){
								return;
							}
							writeBuffer();
							if (pos == mask.replace("?","").length) {
								input.caret(0, pos);
							} else {
								input.caret(pos);
							}
						}, 10);
					})
					.on("blur.mask", blurEvent)
					.on("keydown.mask", keydownEvent)
					.on("keypress.mask", keypressEvent)
					.on("input.mask paste.mask", function() {
						if (input.prop("readonly")){
							return;
						}

setTimeout(function() {
							var pos=checkVal(true);
							input.caret(pos);
							tryFireCompleted();
						}, 0);
					});
				if (chrome && android)
				{
					input
						.off('input.mask')
						.on('input.mask', androidInputEvent);
				}
				checkVal(); //Perform initial check for existing values
			});
		}
	});
}));

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