regexp-helper
Version:
65 lines • 2.22 kB
JavaScript
;
/**
* Created by user on 2018/4/28/028.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.hasFlagsProp = exports.RE_NON_NATIVE_FLAGS = exports.RE_NATIVE_FLAGS = void 0;
exports.getNativeFlags = getNativeFlags;
exports.stripNonNativeFlags = stripNonNativeFlags;
exports.isNativeFlags = isNativeFlags;
exports._getNativeFlags = _getNativeFlags;
exports.prototypeToFlagsArray = prototypeToFlagsArray;
exports.prototypeToFlags = prototypeToFlags;
const regexp_support_1 = require("regexp-support");
exports.RE_NATIVE_FLAGS = new RegExp(`[${regexp_support_1.support.nativeFlags}]`, 'g');
exports.RE_NON_NATIVE_FLAGS = new RegExp(`[^${regexp_support_1.support.nativeFlags}]`, 'g');
exports.hasFlagsProp = regexp_support_1.support.prototype.flags;
function getNativeFlags(target) {
let flags;
if (target instanceof RegExp) {
target = _getNativeFlags(target);
}
if (typeof target === 'string') {
flags = stripNonNativeFlags(target);
}
else {
throw new TypeError(`target must is RegExp or String`);
}
return flags;
}
function stripNonNativeFlags(flags) {
return flags.replace(exports.RE_NON_NATIVE_FLAGS, '');
}
function isNativeFlags(flags) {
return (flags === '') || !exports.RE_NON_NATIVE_FLAGS.test(flags);
}
/**
* Returns native `RegExp` flags used by a regex object.
*
* @private
* @param {RegExp} regex Regex to check.
* @returns {String} Native flags in use.
*/
function _getNativeFlags(regex) {
return exports.hasFlagsProp ?
regex.flags :
/\/([a-z]*)$/i.exec(RegExp.prototype.toString.call(regex))[1];
}
function prototypeToFlagsArray(inputObject, flagMap = regexp_support_1.FlagsName) {
return Object.keys(flagMap)
.reduce(function (a, name) {
if (inputObject[name] === true
&& (name in flagMap)
&& (a.indexOf(flagMap[name]) === -1)) {
a.push(flagMap[name]);
}
return a;
}, [])
.sort();
}
function prototypeToFlags(inputObject, flagMap = regexp_support_1.FlagsName) {
return prototypeToFlagsArray(inputObject, flagMap)
.join('');
}
exports.default = exports;
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