// -*- 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;
  }

  goUpdateCommand("cmd_undo");
  goUpdateCommand("cmd_redo");
  goUpdateCommand("cmd_cut");
  goUpdateCommand("cmd_copy");
  goUpdateCommand("cmd_paste");
  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");
}

// Inject the commandset here instead of relying on preprocessor to share this across documents.
window.addEventListener(
  "DOMContentLoaded",
  () => {
    let container =
      document.querySelector("commandset") || document.documentElement;
    container.appendChild(
      MozXULElement.parseXULToFragment(`
    <commandset id="editMenuCommands">
      <commandset id="editMenuCommandSetAll" commandupdater="true" events="focus,select"
                  oncommandupdate="goUpdateGlobalEditMenuItems()"/>
      <commandset id="editMenuCommandSetUndo" commandupdater="true" events="undo"
                  oncommandupdate="goUpdateUndoEditMenuItems()"/>
      <commandset id="editMenuCommandSetPaste" commandupdater="true" events="clipboard"
                  oncommandupdate="goUpdatePasteMenuItems()"/>
      <command id="cmd_undo" oncommand="goDoCommand('cmd_undo')"/>
      <command id="cmd_redo" oncommand="goDoCommand('cmd_redo')"/>
      <command id="cmd_cut" oncommand="goDoCommand('cmd_cut')"/>
      <command id="cmd_copy" oncommand="goDoCommand('cmd_copy')"/>
      <command id="cmd_paste" oncommand="goDoCommand('cmd_paste')"/>
      <command id="cmd_delete" oncommand="goDoCommand('cmd_delete')"/>
      <command id="cmd_selectAll" oncommand="goDoCommand('cmd_selectAll')"/>
      <command id="cmd_switchTextDirection" oncommand="goDoCommand('cmd_switchTextDirection');"/>
    </commandset>
  `)
    );
  },
  { 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";
  // Note that there's not a risk of e.target being XBL anonymous content for <textbox> (which manages
  // its own context menu), because e.target will be the XBL binding parent in that case.
  let needsContextMenu =
    e.target.ownerDocument == document &&
    !e.defaultPrevented &&
    e.target.parentNode.nodeName != "moz-input-box" &&
    ((["textarea", "input"].includes(e.target.localName) &&
      e.target.namespaceURI == HTML_NS) ||
      e.target.closest("textbox[is='search-textbox']"));

  if (!needsContextMenu) {
    return;
  }

  let popup = document.getElementById("textbox-contextmenu");
  if (!popup) {
    MozXULElement.insertFTLIfNeeded("toolkit/main-window/editmenu.ftl");
    document.documentElement.appendChild(
      MozXULElement.parseXULToFragment(`
      <menupopup id="textbox-contextmenu" class="textbox-contextmenu">
        <menuitem data-l10n-id="editmenu-undo" command="cmd_undo"></menuitem>
        <menuseparator></menuseparator>
        <menuitem data-l10n-id="editmenu-cut" command="cmd_cut"></menuitem>
        <menuitem data-l10n-id="editmenu-copy" command="cmd_copy"></menuitem>
        <menuitem data-l10n-id="editmenu-paste" command="cmd_paste"></menuitem>
        <menuitem data-l10n-id="editmenu-delete" command="cmd_delete"></menuitem>
        <menuseparator></menuseparator>
        <menuitem data-l10n-id="editmenu-select-all" command="cmd_selectAll"></menuitem>
      </menupopup>
    `)
    );
    popup = document.documentElement.lastElementChild;
  }

  goUpdateGlobalEditMenuItems(true);
  popup.openPopupAtScreen(e.screenX, e.screenY, true);
  // 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();
});