You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
664 lines
29 KiB
664 lines
29 KiB
// 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;};
|
|
*/
|
|
|
|
})();
|
|
|
|
|