gecko-dev/dom/base/nsIDOMClassInfo.h
Nicholas Nethercote bf48aecf29 Bug 1332172 - Remove XPC_MAP_WANT_*. r=mccr8.
nsIXPCScriptable flags handling in xpc_map_end.h is a bit of a mess.

- Half the flags relate to whether various functions are defined (PreCreate,
  GetProperty, etc). These are set using the XPC_MAP_WANT_* macros;
  for each one xpc_map_end.h  inserts the corresponding flag using the
  preprocessor (see XPC_MAP_CLASSNAME::GetScriptableFlags()).

- The other half of the flags relate to other things (IS_GLOBAL_OBJECT,
  DONT_REFLECT_INTERFACE_NAMES, etc). These are set using the XPC_MAP_FLAGS
  macro.

Having two similar but different mechanisms to set the flags for a class is
confusing. (Indeed, until recently we had some classes where a single flag was
redundantly specified via both mechanisms.) Note also that the classes done in
dom/base/nsIDOMClassInfo.h also specify all the flags in a single value,
similar to how XPC_MAP_FLAGS works.

This patch removes the XPC_MAP_WANT_* macros. All flags are now set
via XPC_MAP_FLAGS. This is a significant simplification to xpc_map_end.h and
all the places that use it.

The downside of this change is that I had to change the flag constants from
class constants (i.e. nsIXPCScriptable::FOO) to macros (i.e.
NSIXPCSCRIPTABLE_FOO) because they need to be used in #if statements like this
in xpc_map_end.h:

  #if !((XPC_MAP_FLAGS) & NSIXPCSCRIPTABLE_WANT_PRECREATE)

and you can't use a '::'-qualified name inside a #if. I think this downside is
outweighed by the simplification described above.

Overall the patch removes 80 lines of code.

--HG--
extra : rebase_source : 6d5c341d0deba8f1529d81c17bb8819e09620b05
2017-01-23 13:33:58 +11:00

31 lines
1.5 KiB
C

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#ifndef nsIDOMClassInfo_h___
#define nsIDOMClassInfo_h___
#include "nsIXPCScriptable.h"
#define DOM_BASE_SCRIPTABLE_FLAGS \
(XPC_SCRIPTABLE_USE_JSSTUB_FOR_ADDPROPERTY | \
XPC_SCRIPTABLE_USE_JSSTUB_FOR_DELPROPERTY | \
XPC_SCRIPTABLE_USE_JSSTUB_FOR_SETPROPERTY | \
XPC_SCRIPTABLE_ALLOW_PROP_MODS_TO_PROTOTYPE | \
XPC_SCRIPTABLE_DONT_ASK_INSTANCE_FOR_SCRIPTABLE | \
XPC_SCRIPTABLE_DONT_REFLECT_INTERFACE_NAMES)
#define DEFAULT_SCRIPTABLE_FLAGS \
(DOM_BASE_SCRIPTABLE_FLAGS | \
XPC_SCRIPTABLE_WANT_RESOLVE | \
XPC_SCRIPTABLE_WANT_PRECREATE)
#define DOM_DEFAULT_SCRIPTABLE_FLAGS \
(DEFAULT_SCRIPTABLE_FLAGS | \
XPC_SCRIPTABLE_DONT_ENUM_QUERY_INTERFACE | \
XPC_SCRIPTABLE_CLASSINFO_INTERFACES_ONLY)
#endif /* nsIDOMClassInfo_h___ */