The Tor Browser / file comparison
comparison: addon-sdk/source/lib/sdk/frame/hidden-frame.js
addon-sdk/source/lib/sdk/frame/hidden-frame.js
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:3302b35ff066 |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 "use strict"; | |
| 6 | |
| 7 module.metadata = { | |
| 8 "stability": "experimental" | |
| 9 }; | |
| 10 | |
| 11 const { Cc, Ci } = require("chrome"); | |
| 12 const errors = require("../deprecated/errors"); | |
| 13 const { Class } = require("../core/heritage"); | |
| 14 const { List, addListItem, removeListItem } = require("../util/list"); | |
| 15 const { EventTarget } = require("../event/target"); | |
| 16 const { emit } = require("../event/core"); | |
| 17 const { create: makeFrame } = require("./utils"); | |
| 18 const { defer } = require("../core/promise"); | |
| 19 const { when: unload } = require("../system/unload"); | |
| 20 const { validateOptions, getTypeOf } = require("../deprecated/api-utils"); | |
| 21 const { window } = require("../addon/window"); | |
| 22 const { fromIterator } = require("../util/array"); | |
| 23 | |
| 24 // This cache is used to access friend properties between functions | |
| 25 // without exposing them on the public API. | |
| 26 let cache = new Set(); | |
| 27 let elements = new WeakMap(); | |
| 28 | |
| 29 function contentLoaded(target) { | |
| 30 var deferred = defer(); | |
| 31 target.addEventListener("DOMContentLoaded", function DOMContentLoaded(event) { | |
| 32 // "DOMContentLoaded" events from nested frames propagate up to target, | |
| 33 // ignore events unless it's DOMContentLoaded for the given target. | |
| 34 if (event.target === target || event.target === target.contentDocument) { | |
| 35 target.removeEventListener("DOMContentLoaded", DOMContentLoaded, false); | |
| 36 deferred.resolve(target); | |
| 37 } | |
| 38 }, false); | |
| 39 return deferred.promise; | |
| 40 } | |
| 41 | |
| 42 function FrameOptions(options) { | |
| 43 options = options || {} | |
| 44 return validateOptions(options, FrameOptions.validator); | |
| 45 } | |
| 46 FrameOptions.validator = { | |
| 47 onReady: { | |
| 48 is: ["undefined", "function", "array"], | |
| 49 ok: function(v) { | |
| 50 if (getTypeOf(v) === "array") { | |
| 51 // make sure every item is a function | |
| 52 return v.every(function (item) typeof(item) === "function") | |
| 53 } | |
| 54 return true; | |
| 55 } | |
| 56 }, | |
| 57 onUnload: { | |
| 58 is: ["undefined", "function"] | |
| 59 } | |
| 60 }; | |
| 61 | |
| 62 var HiddenFrame = Class({ | |
| 63 extends: EventTarget, | |
| 64 initialize: function initialize(options) { | |
| 65 options = FrameOptions(options); | |
| 66 EventTarget.prototype.initialize.call(this, options); | |
| 67 }, | |
| 68 get element() { | |
| 69 return elements.get(this); | |
| 70 }, | |
| 71 toString: function toString() { | |
| 72 return "[object Frame]" | |
| 73 } | |
| 74 }); | |
| 75 exports.HiddenFrame = HiddenFrame | |
| 76 | |
| 77 function addHidenFrame(frame) { | |
| 78 if (!(frame instanceof HiddenFrame)) | |
| 79 throw Error("The object to be added must be a HiddenFrame."); | |
| 80 | |
| 81 // This instance was already added. | |
| 82 if (cache.has(frame)) return frame; | |
| 83 else cache.add(frame); | |
| 84 | |
| 85 let element = makeFrame(window.document, { | |
| 86 nodeName: "iframe", | |
| 87 type: "content", | |
| 88 allowJavascript: true, | |
| 89 allowPlugins: true, | |
| 90 allowAuth: true, | |
| 91 }); | |
| 92 elements.set(frame, element); | |
| 93 | |
| 94 contentLoaded(element).then(function onFrameReady(element) { | |
| 95 emit(frame, "ready"); | |
| 96 }, console.exception); | |
| 97 | |
| 98 return frame; | |
| 99 } | |
| 100 exports.add = addHidenFrame | |
| 101 | |
| 102 function removeHiddenFrame(frame) { | |
| 103 if (!(frame instanceof HiddenFrame)) | |
| 104 throw Error("The object to be removed must be a HiddenFrame."); | |
| 105 | |
| 106 if (!cache.has(frame)) return; | |
| 107 | |
| 108 // Remove from cache before calling in order to avoid loop | |
| 109 cache.delete(frame); | |
| 110 emit(frame, "unload") | |
| 111 let element = frame.element | |
| 112 if (element) element.parentNode.removeChild(element) | |
| 113 } | |
| 114 exports.remove = removeHiddenFrame; | |
| 115 | |
| 116 unload(function() fromIterator(cache).forEach(removeHiddenFrame)); |
