55 lines
1.7 KiB
JavaScript
55 lines
1.7 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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module.metadata = {
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"stability": "experimental"
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};
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const { Cc, Ci, CC, Cu } = require('chrome');
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const systemPrincipal = CC('@mozilla.org/systemprincipal;1', 'nsIPrincipal')();
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const scriptLoader = Cc['@mozilla.org/moz/jssubscript-loader;1'].
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getService(Ci.mozIJSSubScriptLoader);
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const self = require('sdk/self');
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/**
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* Make a new sandbox that inherits given `source`'s principals. Source can be
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* URI string, DOMWindow or `null` for system principals.
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*/
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function sandbox(target, options) {
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options = options || {};
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options.metadata = options.metadata ? options.metadata : {};
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options.metadata.addonID = options.metadata.addonID ?
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options.metadata.addonID : self.id;
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return Cu.Sandbox(target || systemPrincipal, options);
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}
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exports.sandbox = sandbox;
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/**
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* Evaluates given `source` in a given `sandbox` and returns result.
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*/
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function evaluate(sandbox, code, uri, line, version) {
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return Cu.evalInSandbox(code, sandbox, version || '1.8', uri || '', line || 1);
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}
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exports.evaluate = evaluate;
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/**
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* Evaluates code under the given `uri` in the given `sandbox`.
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*
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* @param {String} uri
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* The URL pointing to the script to load.
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* It must be a local chrome:, resource:, file: or data: URL.
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*/
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function load(sandbox, uri) {
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if (uri.indexOf('data:') === 0) {
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let source = uri.substr(uri.indexOf(',') + 1);
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return evaluate(sandbox, decodeURIComponent(source), '1.8', uri, 0);
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} else {
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return scriptLoader.loadSubScript(uri, sandbox, 'UTF-8');
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}
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}
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exports.load = load;
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