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authorMatt A. Tobin <email@mattatobin.com>2018-02-09 06:46:43 -0500
committerMatt A. Tobin <email@mattatobin.com>2018-02-09 06:46:43 -0500
commitac46df8daea09899ce30dc8fd70986e258c746bf (patch)
tree2750d3125fc253fd5b0671e4bd268eff1fd97296 /toolkit/jetpack/sdk/content/mod.js
parent8cecf8d5208f3945b35f879bba3015bb1a11bec6 (diff)
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Move Add-on SDK source to toolkit/jetpack
Diffstat (limited to 'toolkit/jetpack/sdk/content/mod.js')
-rw-r--r--toolkit/jetpack/sdk/content/mod.js68
1 files changed, 68 insertions, 0 deletions
diff --git a/toolkit/jetpack/sdk/content/mod.js b/toolkit/jetpack/sdk/content/mod.js
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+++ b/toolkit/jetpack/sdk/content/mod.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/. */
+"use strict";
+
+module.metadata = {
+ "stability": "experimental"
+};
+
+const { Ci } = require("chrome");
+const { dispatcher } = require("../util/dispatcher");
+const { add, remove, iterator } = require("../lang/weak-set");
+
+var getTargetWindow = dispatcher("getTargetWindow");
+
+getTargetWindow.define(function (target) {
+ if (target instanceof Ci.nsIDOMWindow)
+ return target;
+ if (target instanceof Ci.nsIDOMDocument)
+ return target.defaultView || null;
+
+ return null;
+});
+
+exports.getTargetWindow = getTargetWindow;
+
+var attachTo = dispatcher("attachTo");
+exports.attachTo = attachTo;
+
+var detachFrom = dispatcher("detatchFrom");
+exports.detachFrom = detachFrom;
+
+function attach(modification, target) {
+ if (!modification)
+ return;
+
+ let window = getTargetWindow(target);
+
+ attachTo(modification, window);
+
+ // modification are stored per content; `window` reference can still be the
+ // same even if the content is changed, therefore `document` is used instead.
+ add(modification, window.document);
+}
+exports.attach = attach;
+
+function detach(modification, target) {
+ if (!modification)
+ return;
+
+ if (target) {
+ let window = getTargetWindow(target);
+ detachFrom(modification, window);
+ remove(modification, window.document);
+ }
+ else {
+ let documents = iterator(modification);
+ for (let document of documents) {
+ let window = document.defaultView;
+ // The window might have already gone away
+ if (!window)
+ continue;
+ detachFrom(modification, document.defaultView);
+ remove(modification, document);
+ }
+ }
+}
+exports.detach = detach;