gecko/dom/base/nsDOMClassInfoID.h

186 lines
7.6 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Johnny Stenback <jst@netscape.com> (original author)
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/**
* This file defines enum values for all of the DOM objects which have
* an entry in nsDOMClassInfo.
*/
#ifndef nsDOMClassInfoID_h__
#define nsDOMClassInfoID_h__
#define DOMCI_CLASS(_dom_class) \
eDOMClassInfo_##_dom_class##_id,
enum nsDOMClassInfoID {
#include "nsDOMClassInfoClasses.h"
// This one better be the last one in this list
eDOMClassInfoIDCount
};
#undef DOMCI_CLASS
/**
* nsIClassInfo helper macros
*/
/**
* DOMCI_CASTABLE_INTERFACES contains the list of interfaces that we have a bit
* for in nsDOMClassInfo's mInterfacesBitmap. To use it you need to define
* DOMCI_CASTABLE_INTERFACE(interface, bit, extra) and then call
* DOMCI_CASTABLE_INTERFACES(extra). For every interface there will be one
* call to DOMCI_CASTABLE_INTERFACE with the bit that it corresponds to and
* the extra argument that was passed in to DOMCI_CASTABLE_INTERFACES.
*
* WARNING: Be very careful when adding interfaces to this list. Every object
* that implements one of these interfaces must be directly castable
* to that interface from the *canonical* nsISupports!
*/
#define DOMCI_CASTABLE_INTERFACES(_extra) \
DOMCI_CASTABLE_INTERFACE(nsINode, nsINode, 0, _extra) \
DOMCI_CASTABLE_INTERFACE(nsIContent, nsIContent, 1, _extra) \
DOMCI_CASTABLE_INTERFACE(nsIDocument, nsIDocument, 2, _extra) \
DOMCI_CASTABLE_INTERFACE(nsINodeList, nsINodeList, 3, _extra) \
DOMCI_CASTABLE_INTERFACE(nsICSSDeclaration, nsICSSDeclaration, 4, _extra) \
DOMCI_CASTABLE_INTERFACE(nsGenericTextNode, nsGenericTextNode, 5, _extra) \
DOMCI_CASTABLE_INTERFACE(nsDocument, nsIDocument, 6, _extra) \
DOMCI_CASTABLE_INTERFACE(nsGenericHTMLElement, nsGenericHTMLElement, 7, \
_extra) \
DOMCI_CASTABLE_INTERFACE(nsHTMLDocument, nsIDocument, 8, _extra) \
DOMCI_CASTABLE_INTERFACE(nsStyledElement, nsStyledElement, 9, _extra) \
DOMCI_CASTABLE_INTERFACE(nsSVGStylableElement, nsIContent, 10, _extra)
// Make sure all classes mentioned in DOMCI_CASTABLE_INTERFACES
// have been declared.
#define DOMCI_CASTABLE_INTERFACE(_interface, _u1, _u2, _u3) class _interface;
DOMCI_CASTABLE_INTERFACES(unused)
#undef DOMCI_CASTABLE_INTERFACE
#ifdef _IMPL_NS_LAYOUT
#define DOMCI_CLASS(_dom_class) \
extern const PRUint32 kDOMClassInfo_##_dom_class##_interfaces;
#include "nsDOMClassInfoClasses.h"
#undef DOMCI_CLASS
/**
* Provide a general "does class C implement interface I" predicate.
* This is not as sophisticated as e.g. boost's is_base_of template,
* but it does the job adequately for our purposes.
*/
#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 2) || \
_MSC_FULL_VER >= 140050215
/* Use a compiler intrinsic if one is available. */
#define DOMCI_CASTABLE_TO(_interface, _class) __is_base_of(_interface, _class)
#else
/* The generic version of this predicate relies on the overload resolution
* rules. If |_class| inherits from |_interface|, the |_interface*|
* overload of DOMCI_CastableTo<_interface>::p() will be chosen, otherwise
* the |void*| overload will be chosen. There is no definition of these
* functions; we determine which overload was selected by inspecting the
* size of the return type.
*/
template <typename Interface> struct DOMCI_CastableTo {
struct false_type { int x[1]; };
struct true_type { int x[2]; };
static false_type p(void*);
static true_type p(Interface*);
};
#define DOMCI_CASTABLE_TO(_interface, _class) \
(sizeof(DOMCI_CastableTo<_interface>::p(static_cast<_class*>(0))) == \
sizeof(DOMCI_CastableTo<_interface>::true_type))
#endif
/**
* Here we calculate the bitmap for a given class.
*/
#define DOMCI_CASTABLE_INTERFACE(_interface, _base, _bit, _class) \
(DOMCI_CASTABLE_TO(_interface, _class) ? 1 << _bit : 0) +
#define DOMCI_DATA(_dom_class, _class) \
const PRUint32 kDOMClassInfo_##_dom_class##_interfaces = \
DOMCI_CASTABLE_INTERFACES(_class) \
0;
class nsIClassInfo;
class nsXPCClassInfo;
extern nsIClassInfo*
NS_GetDOMClassInfoInstance(nsDOMClassInfoID aID);
#define NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(_class) \
if (aIID.Equals(NS_GET_IID(nsIClassInfo)) || \
aIID.Equals(NS_GET_IID(nsXPCClassInfo))) { \
foundInterface = NS_GetDOMClassInfoInstance(eDOMClassInfo_##_class##_id); \
if (!foundInterface) { \
*aInstancePtr = nsnull; \
return NS_ERROR_OUT_OF_MEMORY; \
} \
} else
#define NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO_CONDITIONAL(_class, condition) \
if ((condition) && \
(aIID.Equals(NS_GET_IID(nsIClassInfo)) || \
aIID.Equals(NS_GET_IID(nsXPCClassInfo)))) { \
foundInterface = NS_GetDOMClassInfoInstance(eDOMClassInfo_##_class##_id); \
if (!foundInterface) { \
*aInstancePtr = nsnull; \
return NS_ERROR_OUT_OF_MEMORY; \
} \
} else
#else
// See nsIDOMClassInfo.h
#endif // _IMPL_NS_LAYOUT
#endif // nsDOMClassInfoID_h__