package.src.lib.regex.js Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of plotly.js Show documentation

The open source javascript graphing library that powers plotly

The newest version!

'use strict';

/*
 * make a regex for matching counter ids/names ie xaxis, xaxis2, xaxis10...
 *
 * @param {string} head: the head of the pattern, eg 'x' matches 'x', 'x2', 'x10' etc.
 *      'xy' is a special case for cartesian subplots: it matches 'x2y3' etc
 * @param {Optional(string)} tail: a fixed piece after the id
 *      eg counterRegex('scene', '.annotations') for scene2.annotations etc.
 * @param {boolean} openEnded: if true, the string may continue past the match.
 * @param {boolean} matchBeginning: if false, the string may start before the match.
 */
exports.counter = function(head, tail, openEnded, matchBeginning) {
    var fullTail = (tail || '') + (openEnded ? '' : '$');
    var startWithPrefix = matchBeginning === false ? '' : '^';
    if(head === 'xy') {
        return new RegExp(startWithPrefix + 'x([2-9]|[1-9][0-9]+)?y([2-9]|[1-9][0-9]+)?' + fullTail);
    }
    return new RegExp(startWithPrefix + head + '([2-9]|[1-9][0-9]+)?' + fullTail);
};