1 files changed, 133 insertions, 0 deletions
diff --git a/toolkit/content/editMenuOverlay.js b/toolkit/content/editMenuOverlay.js
new file mode 100644
index 0000000000..b0ec197224
--- /dev/null
+++ b/toolkit/content/editMenuOverlay.js
@@ -0,0 +1,133 @@
+// -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
+
+/* 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/. */
+
+// update menu items that rely on focus or on the current selection
+function goUpdateGlobalEditMenuItems(force) {
+  // Don't bother updating the edit commands if they aren't visible in any way
+  // (i.e. the Edit menu isn't open, nor is the context menu open, nor have the
+  // cut, copy, and paste buttons been added to the toolbars) for performance.
+  // This only works in applications/on platforms that set the gEditUIVisible
+  // flag, so we check to see if that flag is defined before using it.
+  if (!force && typeof gEditUIVisible != "undefined" && !gEditUIVisible) {
+    return;
+  }
+
+  goUpdateUndoEditMenuItems();
+  goUpdateCommand("cmd_cut");
+  goUpdateCommand("cmd_copy");
+  goUpdatePasteMenuItems();
+  goUpdateCommand("cmd_selectAll");
+  goUpdateCommand("cmd_delete");
+  goUpdateCommand("cmd_switchTextDirection");
+}
+
+// update menu items that relate to undo/redo
+function goUpdateUndoEditMenuItems() {
+  goUpdateCommand("cmd_undo");
+  goUpdateCommand("cmd_redo");
+}
+
+// update menu items that depend on clipboard contents
+function goUpdatePasteMenuItems() {
+  goUpdateCommand("cmd_paste");
+  goUpdateCommand("cmd_pasteNoFormatting");
+}
+
+// Inject the commandset here instead of relying on preprocessor to share this across documents.
+window.addEventListener(
+  "DOMContentLoaded",
+  () => {
+    let container =
+      document.querySelector("commandset") || document.documentElement;
+    let fragment = MozXULElement.parseXULToFragment(`
+      <commandset id="editMenuCommands">
+        <commandset id="editMenuCommandSetAll" commandupdater="true" events="focus,select" />
+        <commandset id="editMenuCommandSetUndo" commandupdater="true" events="undo" />
+        <commandset id="editMenuCommandSetPaste" commandupdater="true" events="clipboard" />
+        <command id="cmd_undo" internal="true"/>
+        <command id="cmd_redo" internal="true" />
+        <command id="cmd_cut" internal="true" />
+        <command id="cmd_copy" internal="true" />
+        <command id="cmd_paste" internal="true" />
+        <command id="cmd_pasteNoFormatting" internal="true" />
+        <command id="cmd_delete" />
+        <command id="cmd_selectAll" internal="true" />
+        <command id="cmd_switchTextDirection" />
+      </commandset>
+    `);
+
+    let editMenuCommandSetAll = fragment.querySelector(
+      "#editMenuCommandSetAll"
+    );
+    editMenuCommandSetAll.addEventListener("commandupdate", function () {
+      goUpdateGlobalEditMenuItems();
+    });
+
+    let editMenuCommandSetUndo = fragment.querySelector(
+      "#editMenuCommandSetUndo"
+    );
+    editMenuCommandSetUndo.addEventListener("commandupdate", function () {
+      goUpdateUndoEditMenuItems();
+    });
+
+    let editMenuCommandSetPaste = fragment.querySelector(
+      "#editMenuCommandSetPaste"
+    );
+    editMenuCommandSetPaste.addEventListener("commandupdate", function () {
+      goUpdatePasteMenuItems();
+    });
+
+    fragment.firstElementChild.addEventListener("command", event => {
+      let commandID = event.target.id;
+      goDoCommand(commandID);
+    });
+
+    container.appendChild(fragment);
+  },
+  { once: true }
+);
+
+// Support context menus on html textareas in the parent process:
+window.addEventListener("contextmenu", e => {
+  const HTML_NS = "http://www.w3.org/1999/xhtml";
+  let needsContextMenu =
+    e.composedTarget.ownerDocument == document &&
+    !e.defaultPrevented &&
+    e.composedTarget.parentNode.nodeName != "moz-input-box" &&
+    ((["textarea", "input"].includes(e.composedTarget.localName) &&
+      e.composedTarget.namespaceURI == HTML_NS) ||
+      e.composedTarget.closest("search-textbox"));
+
+  if (!needsContextMenu) {
+    return;
+  }
+
+  let popup = document.getElementById("textbox-contextmenu");
+  if (!popup) {
+    MozXULElement.insertFTLIfNeeded("toolkit/global/textActions.ftl");
+    document.documentElement.appendChild(
+      MozXULElement.parseXULToFragment(`
+      <menupopup id="textbox-contextmenu" class="textbox-contextmenu">
+        <menuitem data-l10n-id="text-action-undo" command="cmd_undo"></menuitem>
+        <menuitem data-l10n-id="text-action-redo" command="cmd_redo"></menuitem>
+        <menuseparator></menuseparator>
+        <menuitem data-l10n-id="text-action-cut" command="cmd_cut"></menuitem>
+        <menuitem data-l10n-id="text-action-copy" command="cmd_copy"></menuitem>
+        <menuitem data-l10n-id="text-action-paste" command="cmd_paste"></menuitem>
+        <menuitem data-l10n-id="text-action-delete" command="cmd_delete"></menuitem>
+        <menuitem data-l10n-id="text-action-select-all" command="cmd_selectAll"></menuitem>
+      </menupopup>
+    `)
+    );
+    popup = document.documentElement.lastElementChild;
+  }
+
+  goUpdateGlobalEditMenuItems(true);
+  popup.openPopupAtScreen(e.screenX, e.screenY, true, e);
+  // Don't show any other context menu at the same time. There can be a
+  // context menu from an ancestor too but we only want to show this one.
+  e.preventDefault();
+});