michael@0: /* -*- Mode: javascript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; js-indent-level: 2; -*- */
michael@0: /* vim: set ft=javascript ts=2 et sw=2 tw=80: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /**
michael@0:  * This file is meant to be loaded as a ChromeWorker. It accepts messages which
michael@0:  * have data of the form:
michael@0:  *
michael@0:  *     { id, url, indent, source }
michael@0:  *
michael@0:  * Where `id` is a unique ID to identify this request, `url` is the url of the
michael@0:  * source being pretty printed, `indent` is the number of spaces to indent the
michael@0:  * code by, and `source` is the source text.
michael@0:  *
michael@0:  * On success, the worker responds with a message of the form:
michael@0:  *
michael@0:  *     { id, code, mappings }
michael@0:  *
michael@0:  * Where `id` is the same unique ID from the request, `code` is the pretty
michael@0:  * printed source text, and `mappings` is an array or source mappings from the
michael@0:  * pretty printed code back to the ugly source text.
michael@0:  *
michael@0:  * In the case of an error, the worker responds with a message of the form:
michael@0:  *
michael@0:  *     { id, error }
michael@0:  */
michael@0: 
michael@0: importScripts("resource://gre/modules/devtools/acorn/acorn.js");
michael@0: importScripts("resource://gre/modules/devtools/source-map.js");
michael@0: importScripts("resource://gre/modules/devtools/pretty-fast.js");
michael@0: 
michael@0: self.onmessage = (event) => {
michael@0:   const { data: { id, url, indent, source } } = event;
michael@0:   try {
michael@0:     const prettified = prettyFast(source, {
michael@0:       url: url,
michael@0:       indent: " ".repeat(indent)
michael@0:     });
michael@0: 
michael@0:     self.postMessage({
michael@0:       id: id,
michael@0:       code: prettified.code,
michael@0:       mappings: prettified.map._mappings
michael@0:     });
michael@0:   } catch (e) {
michael@0:     self.postMessage({
michael@0:       id: id,
michael@0:       error: e.message + "\n" + e.stack
michael@0:     });
michael@0:   }
michael@0: };