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