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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /addon-sdk/source/lib/toolkit/require.js
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'addon-sdk/source/lib/toolkit/require.js')
-rw-r--r--addon-sdk/source/lib/toolkit/require.js91
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diff --git a/addon-sdk/source/lib/toolkit/require.js b/addon-sdk/source/lib/toolkit/require.js
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+++ b/addon-sdk/source/lib/toolkit/require.js
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const make = (exports, rootURI, components) => {
+ const { Loader: { Loader, Require, Module, main } } =
+ components.utils.import(rootURI + "toolkit/loader.js", {});
+
+ const loader = Loader({
+ id: "toolkit/require",
+ rootURI: rootURI,
+ isNative: true,
+ paths: {
+ "": rootURI,
+ "devtools/": "resource://devtools/"
+ }
+ });
+
+ // Implement require.unload(uri) that can be used to unload
+ // already loaded module which is convinient during development phase.
+ const unload = uri => {
+ delete loader.sandboxes[uri];
+ delete loader.modules[uri];
+ };
+
+ const builtins = new Set(Object.keys(loader.modules));
+
+ // Below we define `require` & `require.resolve` that resolve passed
+ // module id relative to the caller URI. This is not perfect but good
+ // enough for common case & there is always an option to pass absolute
+ // id when that
+ // but presumably well enough to cover
+
+ const require = (id, options={}) => {
+ const { reload, all } = options;
+ const requirerURI = components.stack.caller.filename;
+ const requirer = Module(requirerURI, requirerURI);
+ const require = Require(loader, requirer);
+ if (reload) {
+ // To load JS code into modules, loader uses `mozIJSSubScriptLoader`
+ // which uses startup cache to avoid reading source from the same URI
+ // more than once. Unless we invalidate statup cache changes to a module
+ // won't be reflected even after reload. Therefor we must dispatch an
+ // nsIObserverService notification that causes cache invalidation.
+ // Note: This is not ideal since it destroys whole cache, but since there
+ // is no way to invalidate individual entries, we assume performance hit
+ // during development is acceptable.
+ components.classes["@mozilla.org/observer-service;1"].
+ getService(components.interfaces.nsIObserverService).
+ notifyObservers({}, "startupcache-invalidate", null);
+
+ if (all) {
+ for (let uri of Object.keys(loader.sandboxes)) {
+ unload(uri);
+ }
+ }
+ else {
+ unload(require.resolve(id));
+ }
+ }
+ return require(id);
+ };
+
+ require.resolve = id => {
+ const requirerURI = components.stack.caller.filename;
+ const requirer = Module(requirerURI, requirerURI);
+ return Require(loader, requirer).resolve(id);
+ };
+
+ exports.require = require;
+}
+
+// If loaded in the context of commonjs module, reload as JSM into an
+// exports object.
+if (typeof(require) === "function" && typeof(module) === "object") {
+ require("chrome").Cu.import(module.uri, module.exports);
+}
+// If loaded in the context of JSM make a loader & require and define
+// new symbols as exported ones.
+else if (typeof(__URI__) === "string" && this["Components"]) {
+ const builtin = Object.keys(this);
+ const uri = __URI__.replace("toolkit/require.js", "");
+ make(this, uri, this["Components"]);
+
+ this.EXPORTED_SYMBOLS = Object.
+ keys(this).
+ filter($ => builtin.indexOf($) < 0);
+}
+else {
+ throw Error("Loading require.js in this environment isn't supported")
+}