Inputmask/js/inputmask.regex.extensions.js

/*
Input Mask plugin extensions
http://github.com/RobinHerbots/jquery.inputmask
Copyright (c) 2010 -  Robin Herbots
Licensed under the MIT license (http://www.opensource.org/licenses/mit-license.php)
Version: 0.0.0-dev

Regex extensions on the jquery.inputmask base
Allows for using regular expressions as a mask
*/
(function($) {
	Inputmask.extendAliases({ // $(selector).inputmask("Regex", { regex: "[0-9]*"}
		"Regex": {
			mask: "r",
			greedy: false,
			repeat: "*",
			regex: null,
			regexTokens: null,
			//Thx to https://github.com/slevithan/regex-colorizer for the tokenizer regex
			tokenizer: /\[\^?]?(?:[^\\\]]+|\\[\S\s]?)*]?|\\(?:0(?:[0-3][0-7]{0,2}|[4-7][0-7]?)?|[1-9][0-9]*|x[0-9A-Fa-f]{2}|u[0-9A-Fa-f]{4}|c[A-Za-z]|[\S\s]?)|\((?:\?[:=!]?)?|(?:[?*+]|\{[0-9]+(?:,[0-9]*)?\})\??|[^.?*+^${[()|\\]+|./g,
			quantifierFilter: /[0-9]+[^,]/,
			isComplete: function(buffer, opts) {
				return new RegExp(opts.regex).test(buffer.join(""));
			},
			definitions: {
				"r": {
					validator: function(chrs, maskset, pos, strict, opts) {
						var cbuffer = maskset.buffer.slice(),
							regexPart = "",
							isValid = false,
							openGroupCount = 0,
							groupToken;

						function RegexToken(isGroup, isQuantifier) {
							this.matches = [];
							this.isGroup = isGroup || false;
							this.isQuantifier = isQuantifier || false;
							this.quantifier = {
								min: 1,
								max: 1
							};
							this.repeaterPart = undefined;
						}

						function analyseRegex() {
							var currentToken = new RegexToken(),
								match, m, opengroups = [];

							opts.regexTokens = [];

							// The tokenizer regex does most of the tokenization grunt work
							while (match = opts.tokenizer.exec(opts.regex)) {
								m = match[0];
								switch (m.charAt(0)) {
									case "(": // Group opening
										opengroups.push(new RegexToken(true));
										break;
									case ")": // Group closing
										groupToken = opengroups.pop();
										if (opengroups.length > 0)
											opengroups[opengroups.length - 1].matches.push(groupToken);
										else
											currentToken.matches.push(groupToken);

										break;
									case "{":
									case "+":
									case "*": //Quantifier
										var quantifierToken = new RegexToken(false, true);
										m = m.replace(/[{}]/g, "");
										var mq = m.split(","),
											mq0 = isNaN(mq[0]) ? mq[0] : parseInt(mq[0]),
											mq1 = mq.length === 1 ? mq0 : (isNaN(mq[1]) ? mq[1] : parseInt(mq[1]));
										quantifierToken.quantifier = {
											min: mq0,
											max: mq1
										};
										if (opengroups.length > 0) {
											var matches = opengroups[opengroups.length - 1].matches;
											match = matches.pop();
											if (!match.isGroup) {
												groupToken = new RegexToken(true);
												groupToken.matches.push(match);
												match = groupToken;
											}
											matches.push(match);
											matches.push(quantifierToken);
										} else {
											match = currentToken.matches.pop();
											if (!match.isGroup) {
												groupToken = new RegexToken(true);
												groupToken.matches.push(match);
												match = groupToken;
											}
											currentToken.matches.push(match);
											currentToken.matches.push(quantifierToken);
										}
										break;
									default:
										if (opengroups.length > 0) {
											opengroups[opengroups.length - 1].matches.push(m);
										} else {
											currentToken.matches.push(m);
										}
										break;
								}
							}

							if (currentToken.matches.length > 0)
								opts.regexTokens.push(currentToken);
						}

						function validateRegexToken(token, fromGroup) {
							var isvalid = false;
							if (fromGroup) {
								regexPart += "(";
								openGroupCount++;
							}
							for (var mndx = 0; mndx < token.matches.length; mndx++) {
								var matchToken = token.matches[mndx];
								if (matchToken.isGroup === true) {
									isvalid = validateRegexToken(matchToken, true);
								} else if (matchToken.isQuantifier === true) {
									var crrntndx = $.inArray(matchToken, token.matches),
										matchGroup = token.matches[crrntndx - 1];
									var regexPartBak = regexPart;
									if (isNaN(matchToken.quantifier.max)) {
										while (matchToken.repeaterPart && matchToken.repeaterPart !== regexPart && matchToken.repeaterPart.length > regexPart.length) {
											isvalid = validateRegexToken(matchGroup, true);
											if (isvalid) break;
										}
										isvalid = isvalid || validateRegexToken(matchGroup, true);
										if (isvalid) matchToken.repeaterPart = regexPart;
										regexPart = regexPartBak + matchToken.quantifier.max;
									} else {
										for (var i = 0, qm = matchToken.quantifier.max - 1; i < qm; i++) {
											isvalid = validateRegexToken(matchGroup, true);
											if (isvalid) break;
										}
										regexPart = regexPartBak + "{" + matchToken.quantifier.min + "," + matchToken.quantifier.max + "}";
									}
								} else if (matchToken.matches !== undefined) {
									for (var k = 0; k < matchToken.length; k++) {
										isvalid = validateRegexToken(matchToken[k], fromGroup);
										if (isvalid) break;
									}
								} else {
									var testExp;
									if (matchToken.charAt(0) == "[") {
										testExp = regexPart;
										testExp += matchToken;
										for (var j = 0; j < openGroupCount; j++) {
											testExp += ")";
										}
										var exp = new RegExp("^(" + testExp + ")$");
										isvalid = exp.test(bufferStr);
									} else {
										for (var l = 0, tl = matchToken.length; l < tl; l++) {
											if (matchToken.charAt(l) === "\\") continue;
											testExp = regexPart;
											testExp += matchToken.substr(0, l + 1);
											testExp = testExp.replace(/\|$/, "");
											for (var j = 0; j < openGroupCount; j++) {
												testExp += ")";
											}
											var exp = new RegExp("^(" + testExp + ")$");
											isvalid = exp.test(bufferStr);
											if (isvalid) break;
										}
									}
									regexPart += matchToken;
								}
								if (isvalid) break;
							}

							if (fromGroup) {
								regexPart += ")";
								openGroupCount--;
							}

							return isvalid;
						}

						if (opts.regexTokens === null)
							analyseRegex();


						cbuffer.splice(pos, 0, chrs);
						var bufferStr = cbuffer.join("");
						for (var i = 0; i < opts.regexTokens.length; i++) {
							var regexToken = opts.regexTokens[i];
							isValid = validateRegexToken(regexToken, regexToken.isGroup);
							if (isValid) break;
						}

						return isValid;
					},
					cardinality: 1
				}
			}
		}
	});
	return Inputmask;
})(jQuery);