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Diffstat (limited to 'pecan/middleware/resources/XRegExp.js')
| -rw-r--r-- | pecan/middleware/resources/XRegExp.js | 664 |
1 files changed, 0 insertions, 664 deletions
diff --git a/pecan/middleware/resources/XRegExp.js b/pecan/middleware/resources/XRegExp.js deleted file mode 100644 index ebdb9c9..0000000 --- a/pecan/middleware/resources/XRegExp.js +++ /dev/null @@ -1,664 +0,0 @@ -// XRegExp 1.5.1 -// (c) 2007-2012 Steven Levithan -// MIT License -// <http://xregexp.com> -// Provides an augmented, extensible, cross-browser implementation of regular expressions, -// including support for additional syntax, flags, and methods - -var XRegExp; - -if (XRegExp) { - // Avoid running twice, since that would break references to native globals - throw Error("can't load XRegExp twice in the same frame"); -} - -// Run within an anonymous function to protect variables and avoid new globals -(function (undefined) { - - //--------------------------------- - // Constructor - //--------------------------------- - - // Accepts a pattern and flags; returns a new, extended `RegExp` object. Differs from a native - // regular expression in that additional syntax and flags are supported and cross-browser - // syntax inconsistencies are ameliorated. `XRegExp(/regex/)` clones an existing regex and - // converts to type XRegExp - XRegExp = function (pattern, flags) { - var output = [], - currScope = XRegExp.OUTSIDE_CLASS, - pos = 0, - context, tokenResult, match, chr, regex; - - if (XRegExp.isRegExp(pattern)) { - if (flags !== undefined) - throw TypeError("can't supply flags when constructing one RegExp from another"); - return clone(pattern); - } - // Tokens become part of the regex construction process, so protect against infinite - // recursion when an XRegExp is constructed within a token handler or trigger - if (isInsideConstructor) - throw Error("can't call the XRegExp constructor within token definition functions"); - - flags = flags || ""; - context = { // `this` object for custom tokens - hasNamedCapture: false, - captureNames: [], - hasFlag: function (flag) {return flags.indexOf(flag) > -1;}, - setFlag: function (flag) {flags += flag;} - }; - - while (pos < pattern.length) { - // Check for custom tokens at the current position - tokenResult = runTokens(pattern, pos, currScope, context); - - if (tokenResult) { - output.push(tokenResult.output); - pos += (tokenResult.match[0].length || 1); - } else { - // Check for native multicharacter metasequences (excluding character classes) at - // the current position - if (match = nativ.exec.call(nativeTokens[currScope], pattern.slice(pos))) { - output.push(match[0]); - pos += match[0].length; - } else { - chr = pattern.charAt(pos); - if (chr === "[") - currScope = XRegExp.INSIDE_CLASS; - else if (chr === "]") - currScope = XRegExp.OUTSIDE_CLASS; - // Advance position one character - output.push(chr); - pos++; - } - } - } - - regex = RegExp(output.join(""), nativ.replace.call(flags, flagClip, "")); - regex._xregexp = { - source: pattern, - captureNames: context.hasNamedCapture ? context.captureNames : null - }; - return regex; - }; - - - //--------------------------------- - // Public properties - //--------------------------------- - - XRegExp.version = "1.5.1"; - - // Token scope bitflags - XRegExp.INSIDE_CLASS = 1; - XRegExp.OUTSIDE_CLASS = 2; - - - //--------------------------------- - // Private variables - //--------------------------------- - - var replacementToken = /\$(?:(\d\d?|[$&`'])|{([$\w]+)})/g, - flagClip = /[^gimy]+|([\s\S])(?=[\s\S]*\1)/g, // Nonnative and duplicate flags - quantifier = /^(?:[?*+]|{\d+(?:,\d*)?})\??/, - isInsideConstructor = false, - tokens = [], - // Copy native globals for reference ("native" is an ES3 reserved keyword) - nativ = { - exec: RegExp.prototype.exec, - test: RegExp.prototype.test, - match: String.prototype.match, - replace: String.prototype.replace, - split: String.prototype.split - }, - compliantExecNpcg = nativ.exec.call(/()??/, "")[1] === undefined, // check `exec` handling of nonparticipating capturing groups - compliantLastIndexIncrement = function () { - var x = /^/g; - nativ.test.call(x, ""); - return !x.lastIndex; - }(), - hasNativeY = RegExp.prototype.sticky !== undefined, - nativeTokens = {}; - - // `nativeTokens` match native multicharacter metasequences only (including deprecated octals, - // excluding character classes) - nativeTokens[XRegExp.INSIDE_CLASS] = /^(?:\\(?:[0-3][0-7]{0,2}|[4-7][0-7]?|x[\dA-Fa-f]{2}|u[\dA-Fa-f]{4}|c[A-Za-z]|[\s\S]))/; - nativeTokens[XRegExp.OUTSIDE_CLASS] = /^(?:\\(?:0(?:[0-3][0-7]{0,2}|[4-7][0-7]?)?|[1-9]\d*|x[\dA-Fa-f]{2}|u[\dA-Fa-f]{4}|c[A-Za-z]|[\s\S])|\(\?[:=!]|[?*+]\?|{\d+(?:,\d*)?}\??)/; - - - //--------------------------------- - // Public methods - //--------------------------------- - - // Lets you extend or change XRegExp syntax and create custom flags. This is used internally by - // the XRegExp library and can be used to create XRegExp plugins. This function is intended for - // users with advanced knowledge of JavaScript's regular expression syntax and behavior. It can - // be disabled by `XRegExp.freezeTokens` - XRegExp.addToken = function (regex, handler, scope, trigger) { - tokens.push({ - pattern: clone(regex, "g" + (hasNativeY ? "y" : "")), - handler: handler, - scope: scope || XRegExp.OUTSIDE_CLASS, - trigger: trigger || null - }); - }; - - // Accepts a pattern and flags; returns an extended `RegExp` object. If the pattern and flag - // combination has previously been cached, the cached copy is returned; otherwise the newly - // created regex is cached - XRegExp.cache = function (pattern, flags) { - var key = pattern + "/" + (flags || ""); - return XRegExp.cache[key] || (XRegExp.cache[key] = XRegExp(pattern, flags)); - }; - - // Accepts a `RegExp` instance; returns a copy with the `/g` flag set. The copy has a fresh - // `lastIndex` (set to zero). If you want to copy a regex without forcing the `global` - // property, use `XRegExp(regex)`. Do not use `RegExp(regex)` because it will not preserve - // special properties required for named capture - XRegExp.copyAsGlobal = function (regex) { - return clone(regex, "g"); - }; - - // Accepts a string; returns the string with regex metacharacters escaped. The returned string - // can safely be used at any point within a regex to match the provided literal string. Escaped - // characters are [ ] { } ( ) * + ? - . , \ ^ $ | # and whitespace - XRegExp.escape = function (str) { - return str.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&"); - }; - - // Accepts a string to search, regex to search with, position to start the search within the - // string (default: 0), and an optional Boolean indicating whether matches must start at-or- - // after the position or at the specified position only. This function ignores the `lastIndex` - // of the provided regex in its own handling, but updates the property for compatibility - XRegExp.execAt = function (str, regex, pos, anchored) { - var r2 = clone(regex, "g" + ((anchored && hasNativeY) ? "y" : "")), - match; - r2.lastIndex = pos = pos || 0; - match = r2.exec(str); // Run the altered `exec` (required for `lastIndex` fix, etc.) - if (anchored && match && match.index !== pos) - match = null; - if (regex.global) - regex.lastIndex = match ? r2.lastIndex : 0; - return match; - }; - - // Breaks the unrestorable link to XRegExp's private list of tokens, thereby preventing - // syntax and flag changes. Should be run after XRegExp and any plugins are loaded - XRegExp.freezeTokens = function () { - XRegExp.addToken = function () { - throw Error("can't run addToken after freezeTokens"); - }; - }; - - // Accepts any value; returns a Boolean indicating whether the argument is a `RegExp` object. - // Note that this is also `true` for regex literals and regexes created by the `XRegExp` - // constructor. This works correctly for variables created in another frame, when `instanceof` - // and `constructor` checks would fail to work as intended - XRegExp.isRegExp = function (o) { - return Object.prototype.toString.call(o) === "[object RegExp]"; - }; - - // Executes `callback` once per match within `str`. Provides a simpler and cleaner way to - // iterate over regex matches compared to the traditional approaches of subverting - // `String.prototype.replace` or repeatedly calling `exec` within a `while` loop - XRegExp.iterate = function (str, regex, callback, context) { - var r2 = clone(regex, "g"), - i = -1, match; - while (match = r2.exec(str)) { // Run the altered `exec` (required for `lastIndex` fix, etc.) - if (regex.global) - regex.lastIndex = r2.lastIndex; // Doing this to follow expectations if `lastIndex` is checked within `callback` - callback.call(context, match, ++i, str, regex); - if (r2.lastIndex === match.index) - r2.lastIndex++; - } - if (regex.global) - regex.lastIndex = 0; - }; - - // Accepts a string and an array of regexes; returns the result of using each successive regex - // to search within the matches of the previous regex. The array of regexes can also contain - // objects with `regex` and `backref` properties, in which case the named or numbered back- - // references specified are passed forward to the next regex or returned. E.g.: - // var xregexpImgFileNames = XRegExp.matchChain(html, [ - // {regex: /<img\b([^>]+)>/i, backref: 1}, // <img> tag attributes - // {regex: XRegExp('(?ix) \\s src=" (?<src> [^"]+ )'), backref: "src"}, // src attribute values - // {regex: XRegExp("^http://xregexp\\.com(/[^#?]+)", "i"), backref: 1}, // xregexp.com paths - // /[^\/]+$/ // filenames (strip directory paths) - // ]); - XRegExp.matchChain = function (str, chain) { - return function recurseChain (values, level) { - var item = chain[level].regex ? chain[level] : {regex: chain[level]}, - regex = clone(item.regex, "g"), - matches = [], i; - for (i = 0; i < values.length; i++) { - XRegExp.iterate(values[i], regex, function (match) { - matches.push(item.backref ? (match[item.backref] || "") : match[0]); - }); - } - return ((level === chain.length - 1) || !matches.length) ? - matches : recurseChain(matches, level + 1); - }([str], 0); - }; - - - //--------------------------------- - // New RegExp prototype methods - //--------------------------------- - - // Accepts a context object and arguments array; returns the result of calling `exec` with the - // first value in the arguments array. the context is ignored but is accepted for congruity - // with `Function.prototype.apply` - RegExp.prototype.apply = function (context, args) { - return this.exec(args[0]); - }; - - // Accepts a context object and string; returns the result of calling `exec` with the provided - // string. the context is ignored but is accepted for congruity with `Function.prototype.call` - RegExp.prototype.call = function (context, str) { - return this.exec(str); - }; - - - //--------------------------------- - // Overriden native methods - //--------------------------------- - - // Adds named capture support (with backreferences returned as `result.name`), and fixes two - // cross-browser issues per ES3: - // - Captured values for nonparticipating capturing groups should be returned as `undefined`, - // rather than the empty string. - // - `lastIndex` should not be incremented after zero-length matches. - RegExp.prototype.exec = function (str) { - var match, name, r2, origLastIndex; - if (!this.global) - origLastIndex = this.lastIndex; - match = nativ.exec.apply(this, arguments); - if (match) { - // Fix browsers whose `exec` methods don't consistently return `undefined` for - // nonparticipating capturing groups - if (!compliantExecNpcg && match.length > 1 && indexOf(match, "") > -1) { - r2 = RegExp(this.source, nativ.replace.call(getNativeFlags(this), "g", "")); - // Using `str.slice(match.index)` rather than `match[0]` in case lookahead allowed - // matching due to characters outside the match - nativ.replace.call((str + "").slice(match.index), r2, function () { - for (var i = 1; i < arguments.length - 2; i++) { - if (arguments[i] === undefined) - match[i] = undefined; - } - }); - } - // Attach named capture properties - if (this._xregexp && this._xregexp.captureNames) { - for (var i = 1; i < match.length; i++) { - name = this._xregexp.captureNames[i - 1]; - if (name) - match[name] = match[i]; - } - } - // Fix browsers that increment `lastIndex` after zero-length matches - if (!compliantLastIndexIncrement && this.global && !match[0].length && (this.lastIndex > match.index)) - this.lastIndex--; - } - if (!this.global) - this.lastIndex = origLastIndex; // Fix IE, Opera bug (last tested IE 9.0.5, Opera 11.61 on Windows) - return match; - }; - - // Fix browser bugs in native method - RegExp.prototype.test = function (str) { - // Use the native `exec` to skip some processing overhead, even though the altered - // `exec` would take care of the `lastIndex` fixes - var match, origLastIndex; - if (!this.global) - origLastIndex = this.lastIndex; - match = nativ.exec.call(this, str); - // Fix browsers that increment `lastIndex` after zero-length matches - if (match && !compliantLastIndexIncrement && this.global && !match[0].length && (this.lastIndex > match.index)) - this.lastIndex--; - if (!this.global) - this.lastIndex = origLastIndex; // Fix IE, Opera bug (last tested IE 9.0.5, Opera 11.61 on Windows) - return !!match; - }; - - // Adds named capture support and fixes browser bugs in native method - String.prototype.match = function (regex) { - if (!XRegExp.isRegExp(regex)) - regex = RegExp(regex); // Native `RegExp` - if (regex.global) { - var result = nativ.match.apply(this, arguments); - regex.lastIndex = 0; // Fix IE bug - return result; - } - return regex.exec(this); // Run the altered `exec` - }; - - // Adds support for `${n}` tokens for named and numbered backreferences in replacement text, - // and provides named backreferences to replacement functions as `arguments[0].name`. Also - // fixes cross-browser differences in replacement text syntax when performing a replacement - // using a nonregex search value, and the value of replacement regexes' `lastIndex` property - // during replacement iterations. Note that this doesn't support SpiderMonkey's proprietary - // third (`flags`) parameter - String.prototype.replace = function (search, replacement) { - var isRegex = XRegExp.isRegExp(search), - captureNames, result, str, origLastIndex; - - // There are too many combinations of search/replacement types/values and browser bugs that - // preclude passing to native `replace`, so don't try - //if (...) - // return nativ.replace.apply(this, arguments); - - if (isRegex) { - if (search._xregexp) - captureNames = search._xregexp.captureNames; // Array or `null` - if (!search.global) - origLastIndex = search.lastIndex; - } else { - search = search + ""; // Type conversion - } - - if (Object.prototype.toString.call(replacement) === "[object Function]") { - result = nativ.replace.call(this + "", search, function () { - if (captureNames) { - // Change the `arguments[0]` string primitive to a String object which can store properties - arguments[0] = new String(arguments[0]); - // Store named backreferences on `arguments[0]` - for (var i = 0; i < captureNames.length; i++) { - if (captureNames[i]) - arguments[0][captureNames[i]] = arguments[i + 1]; - } - } - // Update `lastIndex` before calling `replacement` (fix browsers) - if (isRegex && search.global) - search.lastIndex = arguments[arguments.length - 2] + arguments[0].length; - return replacement.apply(null, arguments); - }); - } else { - str = this + ""; // Type conversion, so `args[args.length - 1]` will be a string (given nonstring `this`) - result = nativ.replace.call(str, search, function () { - var args = arguments; // Keep this function's `arguments` available through closure - return nativ.replace.call(replacement + "", replacementToken, function ($0, $1, $2) { - // Numbered backreference (without delimiters) or special variable - if ($1) { - switch ($1) { - case "$": return "$"; - case "&": return args[0]; - case "`": return args[args.length - 1].slice(0, args[args.length - 2]); - case "'": return args[args.length - 1].slice(args[args.length - 2] + args[0].length); - // Numbered backreference - default: - // What does "$10" mean? - // - Backreference 10, if 10 or more capturing groups exist - // - Backreference 1 followed by "0", if 1-9 capturing groups exist - // - Otherwise, it's the string "$10" - // Also note: - // - Backreferences cannot be more than two digits (enforced by `replacementToken`) - // - "$01" is equivalent to "$1" if a capturing group exists, otherwise it's the string "$01" - // - There is no "$0" token ("$&" is the entire match) - var literalNumbers = ""; - $1 = +$1; // Type conversion; drop leading zero - if (!$1) // `$1` was "0" or "00" - return $0; - while ($1 > args.length - 3) { - literalNumbers = String.prototype.slice.call($1, -1) + literalNumbers; - $1 = Math.floor($1 / 10); // Drop the last digit - } - return ($1 ? args[$1] || "" : "$") + literalNumbers; - } - // Named backreference or delimited numbered backreference - } else { - // What does "${n}" mean? - // - Backreference to numbered capture n. Two differences from "$n": - // - n can be more than two digits - // - Backreference 0 is allowed, and is the entire match - // - Backreference to named capture n, if it exists and is not a number overridden by numbered capture - // - Otherwise, it's the string "${n}" - var n = +$2; // Type conversion; drop leading zeros - if (n <= args.length - 3) - return args[n]; - n = captureNames ? indexOf(captureNames, $2) : -1; - return n > -1 ? args[n + 1] : $0; - } - }); - }); - } - - if (isRegex) { - if (search.global) - search.lastIndex = 0; // Fix IE, Safari bug (last tested IE 9.0.5, Safari 5.1.2 on Windows) - else - search.lastIndex = origLastIndex; // Fix IE, Opera bug (last tested IE 9.0.5, Opera 11.61 on Windows) - } - - return result; - }; - - // A consistent cross-browser, ES3 compliant `split` - String.prototype.split = function (s /* separator */, limit) { - // If separator `s` is not a regex, use the native `split` - if (!XRegExp.isRegExp(s)) - return nativ.split.apply(this, arguments); - - var str = this + "", // Type conversion - output = [], - lastLastIndex = 0, - match, lastLength; - - // Behavior for `limit`: if it's... - // - `undefined`: No limit - // - `NaN` or zero: Return an empty array - // - A positive number: Use `Math.floor(limit)` - // - A negative number: No limit - // - Other: Type-convert, then use the above rules - if (limit === undefined || +limit < 0) { - limit = Infinity; - } else { - limit = Math.floor(+limit); - if (!limit) - return []; - } - - // This is required if not `s.global`, and it avoids needing to set `s.lastIndex` to zero - // and restore it to its original value when we're done using the regex - s = XRegExp.copyAsGlobal(s); - - while (match = s.exec(str)) { // Run the altered `exec` (required for `lastIndex` fix, etc.) - if (s.lastIndex > lastLastIndex) { - output.push(str.slice(lastLastIndex, match.index)); - - if (match.length > 1 && match.index < str.length) - Array.prototype.push.apply(output, match.slice(1)); - - lastLength = match[0].length; - lastLastIndex = s.lastIndex; - - if (output.length >= limit) - break; - } - - if (s.lastIndex === match.index) - s.lastIndex++; - } - - if (lastLastIndex === str.length) { - if (!nativ.test.call(s, "") || lastLength) - output.push(""); - } else { - output.push(str.slice(lastLastIndex)); - } - - return output.length > limit ? output.slice(0, limit) : output; - }; - - - //--------------------------------- - // Private helper functions - //--------------------------------- - - // Supporting function for `XRegExp`, `XRegExp.copyAsGlobal`, etc. Returns a copy of a `RegExp` - // instance with a fresh `lastIndex` (set to zero), preserving properties required for named - // capture. Also allows adding new flags in the process of copying the regex - function clone (regex, additionalFlags) { - if (!XRegExp.isRegExp(regex)) - throw TypeError("type RegExp expected"); - var x = regex._xregexp; - regex = XRegExp(regex.source, getNativeFlags(regex) + (additionalFlags || "")); - if (x) { - regex._xregexp = { - source: x.source, - captureNames: x.captureNames ? x.captureNames.slice(0) : null - }; - } - return regex; - } - - function getNativeFlags (regex) { - return (regex.global ? "g" : "") + - (regex.ignoreCase ? "i" : "") + - (regex.multiline ? "m" : "") + - (regex.extended ? "x" : "") + // Proposed for ES4; included in AS3 - (regex.sticky ? "y" : ""); - } - - function runTokens (pattern, index, scope, context) { - var i = tokens.length, - result, match, t; - // Protect against constructing XRegExps within token handler and trigger functions - isInsideConstructor = true; - // Must reset `isInsideConstructor`, even if a `trigger` or `handler` throws - try { - while (i--) { // Run in reverse order - t = tokens[i]; - if ((scope & t.scope) && (!t.trigger || t.trigger.call(context))) { - t.pattern.lastIndex = index; - match = t.pattern.exec(pattern); // Running the altered `exec` here allows use of named backreferences, etc. - if (match && match.index === index) { - result = { - output: t.handler.call(context, match, scope), - match: match - }; - break; - } - } - } - } catch (err) { - throw err; - } finally { - isInsideConstructor = false; - } - return result; - } - - function indexOf (array, item, from) { - if (Array.prototype.indexOf) // Use the native array method if available - return array.indexOf(item, from); - for (var i = from || 0; i < array.length; i++) { - if (array[i] === item) - return i; - } - return -1; - } - - - //--------------------------------- - // Built-in tokens - //--------------------------------- - - // Augment XRegExp's regular expression syntax and flags. Note that when adding tokens, the - // third (`scope`) argument defaults to `XRegExp.OUTSIDE_CLASS` - - // Comment pattern: (?# ) - XRegExp.addToken( - /\(\?#[^)]*\)/, - function (match) { - // Keep tokens separated unless the following token is a quantifier - return nativ.test.call(quantifier, match.input.slice(match.index + match[0].length)) ? "" : "(?:)"; - } - ); - - // Capturing group (match the opening parenthesis only). - // Required for support of named capturing groups - XRegExp.addToken( - /\((?!\?)/, - function () { - this.captureNames.push(null); - return "("; - } - ); - - // Named capturing group (match the opening delimiter only): (?<name> - XRegExp.addToken( - /\(\?<([$\w]+)>/, - function (match) { - this.captureNames.push(match[1]); - this.hasNamedCapture = true; - return "("; - } - ); - - // Named backreference: \k<name> - XRegExp.addToken( - /\\k<([\w$]+)>/, - function (match) { - var index = indexOf(this.captureNames, match[1]); - // Keep backreferences separate from subsequent literal numbers. Preserve back- - // references to named groups that are undefined at this point as literal strings - return index > -1 ? - "\\" + (index + 1) + (isNaN(match.input.charAt(match.index + match[0].length)) ? "" : "(?:)") : - match[0]; - } - ); - - // Empty character class: [] or [^] - XRegExp.addToken( - /\[\^?]/, - function (match) { - // For cross-browser compatibility with ES3, convert [] to \b\B and [^] to [\s\S]. - // (?!) should work like \b\B, but is unreliable in Firefox - return match[0] === "[]" ? "\\b\\B" : "[\\s\\S]"; - } - ); - - // Mode modifier at the start of the pattern only, with any combination of flags imsx: (?imsx) - // Does not support x(?i), (?-i), (?i-m), (?i: ), (?i)(?m), etc. - XRegExp.addToken( - /^\(\?([imsx]+)\)/, - function (match) { - this.setFlag(match[1]); - return ""; - } - ); - - // Whitespace and comments, in free-spacing (aka extended) mode only - XRegExp.addToken( - /(?:\s+|#.*)+/, - function (match) { - // Keep tokens separated unless the following token is a quantifier - return nativ.test.call(quantifier, match.input.slice(match.index + match[0].length)) ? "" : "(?:)"; - }, - XRegExp.OUTSIDE_CLASS, - function () {return this.hasFlag("x");} - ); - - // Dot, in dotall (aka singleline) mode only - XRegExp.addToken( - /\./, - function () {return "[\\s\\S]";}, - XRegExp.OUTSIDE_CLASS, - function () {return this.hasFlag("s");} - ); - - - //--------------------------------- - // Backward compatibility - //--------------------------------- - - // Uncomment the following block for compatibility with XRegExp 1.0-1.2: - /* - XRegExp.matchWithinChain = XRegExp.matchChain; - RegExp.prototype.addFlags = function (s) {return clone(this, s);}; - RegExp.prototype.execAll = function (s) {var r = []; XRegExp.iterate(s, this, function (m) {r.push(m);}); return r;}; - RegExp.prototype.forEachExec = function (s, f, c) {return XRegExp.iterate(s, this, f, c);}; - RegExp.prototype.validate = function (s) {var r = RegExp("^(?:" + this.source + ")$(?!\\s)", getNativeFlags(this)); if (this.global) this.lastIndex = 0; return s.search(r) === 0;}; - */ - -})(); - |