@antv/path-util/esm/parse-path-string.js

A common util collection for antv projects

import { isArray } from 'lodash-es';
var SPACES = '\x09\x0a\x0b\x0c\x0d\x20\xa0\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000\u2028\u2029';
var PATH_COMMAND = new RegExp('([a-z])[' + SPACES + ',]*((-?\\d*\\.?\\d*(?:e[\\-+]?\\d+)?[' + SPACES + ']*,?[' + SPACES + ']*)+)', 'ig');
var PATH_VALUES = new RegExp('(-?\\d*\\.?\\d*(?:e[\\-+]?\\d+)?)[' + SPACES + ']*,?[' + SPACES + ']*', 'ig');
// Parses given path string into an array of arrays of path segments
export default function parsePathString(pathString) {
    if (!pathString) {
        return null;
    }
    if (isArray(pathString)) {
        return pathString;
    }
    var paramCounts = {
        a: 7,
        c: 6,
        o: 2,
        h: 1,
        l: 2,
        m: 2,
        r: 4,
        q: 4,
        s: 4,
        t: 2,
        v: 1,
        u: 3,
        z: 0,
    };
    var data = [];
    String(pathString).replace(PATH_COMMAND, function (a, b, c) {
        var params = [];
        var name = b.toLowerCase();
        c.replace(PATH_VALUES, function (a, b) {
            b && params.push(+b);
        });
        if (name === 'm' && params.length > 2) {
            data.push([b].concat(params.splice(0, 2)));
            name = 'l';
            b = b === 'm' ? 'l' : 'L';
        }
        if (name === 'o' && params.length === 1) {
            data.push([b, params[0]]);
        }
        if (name === 'r') {
            data.push([b].concat(params));
        }
        else {
            while (params.length >= paramCounts[name]) {
                data.push([b].concat(params.splice(0, paramCounts[name])));
                if (!paramCounts[name]) {
                    break;
                }
            }
        }
        return '';
    });
    return data;
}
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