1 files changed, 61 insertions, 0 deletions
diff --git a/browser/extensions/formautofill/content/l10n.js b/browser/extensions/formautofill/content/l10n.js
new file mode 100644
index 0000000000..85346d41ee
--- /dev/null
+++ b/browser/extensions/formautofill/content/l10n.js
@@ -0,0 +1,61 @@
+/* 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 file will be replaced by Fluent but it's a middle ground so we can share
+ * the edit dialog code with the unprivileged PaymentRequest dialog before the
+ * Fluent conversion
+ */
+
+const { FormAutofillUtils } = ChromeUtils.import(
+  "resource://formautofill/FormAutofillUtils.jsm"
+);
+
+const CONTENT_WIN = typeof window != "undefined" ? window : this;
+
+const L10N_ATTRIBUTES = ["data-localization", "data-localization-region"];
+
+// eslint-disable-next-line mozilla/balanced-listeners
+CONTENT_WIN.addEventListener("DOMContentLoaded", function onDCL(evt) {
+  let doc = evt.target;
+  FormAutofillUtils.localizeMarkup(doc);
+
+  let mutationObserver = new doc.ownerGlobal.MutationObserver(
+    function onMutation(mutations) {
+      for (let mutation of mutations) {
+        switch (mutation.type) {
+          case "attributes": {
+            if (!mutation.target.hasAttribute(mutation.attributeName)) {
+              // The attribute was removed in the meantime.
+              continue;
+            }
+            FormAutofillUtils.localizeAttributeForElement(
+              mutation.target,
+              mutation.attributeName
+            );
+            break;
+          }
+
+          case "childList": {
+            // We really only care about elements appending inside pages.
+            if (!mutation.addedNodes || !mutation.target.closest(".page")) {
+              break;
+            }
+            FormAutofillUtils.localizeMarkup(mutation.target);
+            break;
+          }
+        }
+      }
+    }
+  );
+
+  mutationObserver.observe(doc, {
+    attributes: true,
+    attributeFilter: L10N_ATTRIBUTES,
+    childList: true,
+    subtree: true,
+  });
+});