From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 addon-sdk/source/lib/sdk/content/mod.js | 68 +++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 addon-sdk/source/lib/sdk/content/mod.js

(limited to 'addon-sdk/source/lib/sdk/content/mod.js')

diff --git a/addon-sdk/source/lib/sdk/content/mod.js b/addon-sdk/source/lib/sdk/content/mod.js
new file mode 100644
index 000000000..81fe9ee42
--- /dev/null
+++ b/addon-sdk/source/lib/sdk/content/mod.js
@@ -0,0 +1,68 @@
+/* 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;
-- 
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