widget/nsIStandaloneNativeMenu.idl
author Nicholas Nethercote <nnethercote@mozilla.com>
Wed, 25 Oct 2017 10:22:38 +1100
changeset 387909 3d0093f961eec929caa370444cd0f7fcbfbc82bc
parent 94484 f4157e8c410708d76703f19e4dfb61859bfe32d8
child 415894 7f3223b376bb4f473b44e8d3d504df58b70652a0
permissions -rw-r--r--
Bug 1410794 - Change some |string| occurrences in nsIPrefBranch.idl to |ACString|. r=erahm. This makes the code nicer. In particular, it removes many getter_Copies() calls. The patch also converts a lot of nsCStrings to nsAutoCString, which will avoid heap allocation in the common case. The patch also renames PREF_CopyCharPref() as PREF_GetCStringPref(), because it's actually getting a string, not a char, and that matches the existing GetCString() and GetDefaultCString() methods. Correspondingly, it also renames PREF_SetCharPref() as PREF_SetCStringPref(). The |aPrefName| arguments in nsIPrefBranch.idl remain as |string| because they almost always involve passing in C string literals, and passing "foo" is much nicer than passing NS_LITERAL_CSTRING("foo"). It's worth noting that early versions of this patch used |AUTF8String| instead of |ACString|. But it turns out that libpref stores prefs internally as Latin1. And |ACString| is compatible with Latin1 but |AUTF8String| isn't, because non-ASCII Latin1 strings are not valid UTF-8!

/* 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/. */

#include "nsISupports.idl"

interface nsIDOMElement;

/**
 * Platform-independent interface to platform native menu objects.
 */

[scriptable, uuid(7F7201EB-510C-4CEF-BDF0-04A15A7A4A8C)]
interface nsIStandaloneNativeMenu : nsISupports
{
  /**
   * Initialize the native menu using given XUL DOM element.
   *
   * @param aDOMElement A XUL DOM element of tag type |menu| or |menupopup|.
   */
  void init(in nsIDOMElement aDOMElement);

  /**
   * This method must be called before the menu is opened and displayed to the
   * user. It allows the platform code to update the menu and also determine
   * whether the menu should even be shown.
   *
   * @return true if the menu can be shown, false if it should not be shown
   */
  boolean menuWillOpen();

  /**
   * The native object representing the XUL menu that was passed to Init(). On
   * Mac OS X, this will be a NSMenu pointer, which will be retained and
   * autoreleased when the attribute is retrieved.
   */
  [noscript] readonly attribute voidPtr nativeMenu;

  /**
   * Activate the native menu item specified by |anIndexString|. This method
   * is intended to be used by the test suite.
   *
   * @param anIndexString string containing a list of indices separated by
   *        pipe ('|') characters
   */
  void activateNativeMenuItemAt(in AString anIndexString);

  /**
   * Force an update of the native menu item specified by |anIndexString|. This
   * method is intended to be used by the test suite.
   *
   * @param anIndexString string containing a list of indices separated by
   *        pipe ('|') characters
   */
  void forceUpdateNativeMenuAt(in AString anIndexString);
};