1 files changed, 86 insertions, 0 deletions
diff --git a/comm/mailnews/base/content/menulist-charsetpicker.js b/comm/mailnews/base/content/menulist-charsetpicker.js
new file mode 100644
index 0000000000..eb354621a7
--- /dev/null
+++ b/comm/mailnews/base/content/menulist-charsetpicker.js
@@ -0,0 +1,86 @@
+/* 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 https://mozilla.org/MPL/2.0/. */
+
+// The menulist CE is defined lazily. Create one now to get menulist defined,
+// allowing us to inherit from it.
+if (!customElements.get("menulist")) {
+  delete document.createXULElement("menulist");
+}
+
+// Wrap in a block to prevent leaking to window scope.
+{
+  /**
+   * MozMenulistCharsetpicker is a menulist widget that is automatically
+   * populated with charset selections.
+   *
+   * @augments {MozMenuList}
+   */
+  class MozMenulistCharsetpickerViewing extends customElements.get("menulist") {
+    /**
+     * Get the charset values to show in the list.
+     *
+     * @abstract
+     * @returns {string[]} an array of character encoding names
+     */
+    get charsetValues() {
+      return [
+        "UTF-8",
+        "Big5",
+        "EUC-KR",
+        "gbk",
+        "KOI8-R",
+        "ISO-2022-JP",
+        "ISO-8859-1",
+        "ISO-8859-2",
+        "ISO-8859-7",
+        "windows-874",
+        "windows-1250",
+        "windows-1251",
+        "windows-1252",
+        "windows-1255",
+        "windows-1256",
+        "windows-1257",
+        "windows-1258",
+      ];
+    }
+
+    connectedCallback() {
+      super.connectedCallback();
+      if (this.delayConnectedCallback()) {
+        return;
+      }
+
+      if (this.menupopup) {
+        return;
+      }
+
+      let charsetBundle = Services.strings.createBundle(
+        "chrome://messenger/locale/charsetTitles.properties"
+      );
+      this.charsetValues
+        .map(item => {
+          let strCharset = charsetBundle.GetStringFromName(
+            item.toLowerCase() + ".title"
+          );
+          return { label: strCharset, value: item };
+        })
+        .sort((a, b) => {
+          if (a.value == "UTF-8" || a.label < b.label) {
+            return -1;
+          } else if (b.value == "UTF-8" || a.label > b.label) {
+            return 1;
+          }
+          return 0;
+        })
+        .forEach(item => {
+          this.appendItem(item.label, item.value);
+        });
+    }
+  }
+  customElements.define(
+    "menulist-charsetpicker-viewing",
+    MozMenulistCharsetpickerViewing,
+    { extends: "menulist" }
+  );
+}