/* -*- 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 (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 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 #else // See nsIDOMClassInfo.h #endif // _IMPL_NS_LAYOUT #endif // nsDOMClassInfoID_h__