summaryrefslogtreecommitdiffstats
path: root/dom/quota/test/modules/system/ModuleLoader.sys.mjs
blob: d4f8f51c11c4b354fbf58dc840866323ac5bc060 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
/**
 * Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/publicdomain/zero/1.0/
 */

export function ModuleLoader(base, depth, proto) {
  const modules = {};

  const principal = Cc["@mozilla.org/systemprincipal;1"].createInstance(
    Ci.nsIPrincipal
  );

  const sharedGlobalsandbox = Cu.Sandbox(principal, {
    invisibleToDebugger: true,
    sandboxName: "FS Module Loader",
    sandboxPrototype: proto,
    wantComponents: false,
    wantGlobalProperties: [],
    wantXrays: false,
  });

  const require = async function (id) {
    if (modules[id]) {
      return modules[id].exported_symbols;
    }

    const url = new URL(depth + id, base);

    const module = Object.create(null, {
      exported_symbols: {
        configurable: false,
        enumerable: true,
        value: Object.create(null),
        writable: true,
      },
    });

    modules[id] = module;

    const properties = {
      require_module: require,
      exported_symbols: module.exported_symbols,
    };

    // Create a new object in this sandbox, that will be used as the scope
    // object for this particular module.
    const sandbox = sharedGlobalsandbox.Object();
    Object.assign(sandbox, properties);

    Services.scriptloader.loadSubScript(url.href, sandbox);

    return module.exported_symbols;
  };

  const returnObj = {
    require: {
      enumerable: true,
      value: require,
    },
  };

  return Object.create(null, returnObj);
}