User:JPxG/JWB.js/worker.js

/** * Web Worker for AutoWikiBrowser script. Used to run certain tasks on a parallel process to be able to terminate it. * Idea from https://stackoverflow.com/a/66162733/1256925. Dirty hack workaround due to https://stackoverflow.com/q/66188950/1256925. * See https://en.wikipedia.org/wiki/User:Joeytje50/JWB.js for the full script, as well as licensing. * Licensed under GNU GPL 2. http://www.gnu.org/copyleft/gpl.html */

JWB.worker.function = function { var ret = {}; function regexMatch(str, pattern, flags, callback) { var re, result; try { re = new RegExp(pattern, flags); result = str.match(re); } catch(e) { // catch and propagate invalid regexes etc.			callback(undefined, e); }		callback(result, undefined); }	ret.match = regexMatch; function regexReplace(str, pattern, flags, rWith, callback) { var re, result; try { re = new RegExp(pattern, flags); result = str.replace(re, rWith); } catch(e) { // catch and propagate invalid regexes etc.			callback(undefined, e); }		callback(result, undefined); }	ret.replace = regexReplace; //function to *only* replace the parsed wikitext //It excludes comments, and nowiki, math, source, syntaxhighlight, pre, code, gallery and timeline tags)	//Based on http://stackoverflow.com/a/23589204/1256925	function unparsedReplace(str, pattern, flags, rWith, callback) {		var exclude = '(|<(nowiki|math|source|syntaxhighlight|pre|gallery|timeline)[^>]*?>[\\s\\S]*?)';		//add /i flag, to exclude the correct tags regardless of casing.		//This won't matter for the actual replacing, as the specified flags are used there.		var replacements = 0;		var global = flags.indexOf('g') !== -1;		// build regex with exclusion list.		// This re will be case insensitive, but the actual replacement done will still be case sensitive if the 'i' flag is not given.		// This re will also be executed globally on the string, but the separate tracker will only allow one replacement to be done if 'g' is not given.		try {			var re = new RegExp(exclude + '|(' + pattern + ')', flags.replace(/i|$/, 'i').replace(/g|$/, 'g')); str = str.replace(re, function(match, g1, g2, g3) {				if (!global && replacements > 0) { // a replacement has already been made in non-global mode					return match;				} else if (g3 !== undefined) { //continue to perform replacement if the match is the group that's supposed to be the match					replacements++; // keep track of the amount of replacements made.					return match.replace(new RegExp(pattern, flags), rWith);				} else { //do nothing if the match is one of the excluded groups					return match;				}			}); } catch(e) { // catch and propagate invalid regexes etc.			callback(undefined, e); }		callback(str, undefined); }	ret.unparsedreplace = unparsedReplace; onmessage = function(e) { let data = e.data; console.log('worker message', data); let callback = (result, err) => postMessage({cmd: data.cmd, result: result, err: err}); switch (data.cmd) { case 'match': regexMatch(data.str, data.pattern, data.flags, callback); break; case 'replace': regexReplace(data.str, data.pattern, data.flags, data.rWith, callback); break; case 'unparsedreplace': unparsedReplace(data.str, data.pattern, data.flags, data.rWith, callback); break; default: postMessage({err: 'Unknown command: ' + data.cmd}); }	};	return ret; // return object containing synchronous functions as a fallback. };