1 files changed, 78 insertions, 0 deletions
diff --git a/toolkit/content/widgets/stringbundle.js b/toolkit/content/widgets/stringbundle.js
new file mode 100644
index 0000000000..c780950f16
--- /dev/null
+++ b/toolkit/content/widgets/stringbundle.js
@@ -0,0 +1,78 @@
+/* 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";
+
+// This is loaded into chrome windows with the subscript loader. Wrap in
+// a block to prevent accidentally leaking globals onto `window`.
+{
+  const { Services } = ChromeUtils.import(
+    "resource://gre/modules/Services.jsm"
+  );
+
+  class MozStringbundle extends MozXULElement {
+    get stringBundle() {
+      if (!this._bundle) {
+        try {
+          this._bundle = Services.strings.createBundle(this.src);
+        } catch (e) {
+          dump("Failed to get stringbundle:\n");
+          dump(e + "\n");
+        }
+      }
+      return this._bundle;
+    }
+
+    set src(val) {
+      this._bundle = null;
+      this.setAttribute("src", val);
+      return val;
+    }
+
+    get src() {
+      return this.getAttribute("src");
+    }
+
+    get strings() {
+      // Note: this is a sucky method name! Should be:
+      //       readonly attribute nsISimpleEnumerator strings;
+      return this.stringBundle.getSimpleEnumeration();
+    }
+
+    getString(aStringKey) {
+      try {
+        return this.stringBundle.GetStringFromName(aStringKey);
+      } catch (e) {
+        dump(
+          "*** Failed to get string " +
+            aStringKey +
+            " in bundle: " +
+            this.src +
+            "\n"
+        );
+        throw e;
+      }
+    }
+
+    getFormattedString(aStringKey, aStringsArray) {
+      try {
+        return this.stringBundle.formatStringFromName(
+          aStringKey,
+          aStringsArray
+        );
+      } catch (e) {
+        dump(
+          "*** Failed to format string " +
+            aStringKey +
+            " in bundle: " +
+            this.src +
+            "\n"
+        );
+        throw e;
+      }
+    }
+  }
+
+  customElements.define("stringbundle", MozStringbundle);
+}