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nsXBLProtoImpl.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is Mozilla Communicator client code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   David Hyatt <hyatt@netscape.com> (Original Author)
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either of the GNU General Public License Version 2 or later (the "GPL"),
00027  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
00030  * under the terms of either the GPL or the LGPL, and not to allow others to
00031  * use your version of this file under the terms of the MPL, indicate your
00032  * decision by deleting the provisions above and replace them with the notice
00033  * and other provisions required by the GPL or the LGPL. If you do not delete
00034  * the provisions above, a recipient may use your version of this file under
00035  * the terms of any one of the MPL, the GPL or the LGPL.
00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #ifndef nsXBLProtoImpl_h__
00040 #define nsXBLProtoImpl_h__
00041 
00042 #include "nsMemory.h"
00043 #include "nsXBLPrototypeHandler.h"
00044 #include "nsXBLProtoImplMember.h"
00045 #include "nsXBLPrototypeBinding.h"
00046 
00047 class nsIXPConnectJSObjectHolder;
00048 
00049 MOZ_DECL_CTOR_COUNTER(nsXBLProtoImpl)
00050 
00051 class nsXBLProtoImpl
00052 {
00053 public:
00054   nsXBLProtoImpl() 
00055     : mClassObject(nsnull),
00056       mMembers(nsnull),
00057       mConstructor(nsnull),
00058       mDestructor(nsnull)
00059   { 
00060     MOZ_COUNT_CTOR(nsXBLProtoImpl); 
00061   };
00062   ~nsXBLProtoImpl() 
00063   { 
00064     MOZ_COUNT_DTOR(nsXBLProtoImpl);
00065     // Note: the constructor and destructor are in mMembers, so we'll
00066     // clean them up automatically.
00067     for (nsXBLProtoImplMember* curr = mMembers; curr; curr=curr->GetNext())
00068       curr->Destroy(mClassObject != nsnull);
00069     delete mMembers; 
00070   };
00071   
00072   nsresult InstallImplementation(nsXBLPrototypeBinding* aBinding, nsIContent* aBoundElement);
00073   nsresult InitTargetObjects(nsXBLPrototypeBinding* aBinding, nsIScriptContext* aContext, 
00074                              nsIContent* aBoundElement, 
00075                              nsIXPConnectJSObjectHolder** aScriptObjectHolder,
00076                              void** aTargetClassObject);
00077   nsresult CompilePrototypeMembers(nsXBLPrototypeBinding* aBinding);
00078 
00079   void SetMemberList(nsXBLProtoImplMember* aMemberList) { delete mMembers; mMembers = aMemberList; };
00080 
00081 protected:
00082   // Function to call if compilation of a member fails.  When this is called,
00083   // all members before aBrokenMember are compiled, compilation of
00084   // aBrokenMember failed, and members after aBrokenMember are uncompiled.
00085   // This function assumes that aBrokenMember is _not_ compiled.
00086   void DestroyMembers(nsXBLProtoImplMember* aBrokenMember);
00087   
00088 public:
00089   nsCString mClassName; // The name of the class. 
00090 
00091   PRBool CompiledMembers() const {
00092     return mClassObject != nsnull;
00093   }
00094 
00095 protected:
00096   void* mClassObject;   // The class object for the binding. We'll use this to pre-compile properties 
00097                         // and methods for the binding.
00098 
00099   nsXBLProtoImplMember* mMembers; // The members of an implementation are chained in this singly-linked list.
00100   
00101 public:
00102   nsXBLProtoImplAnonymousMethod* mConstructor; // Our class constructor.
00103   nsXBLProtoImplAnonymousMethod* mDestructor;  // Our class destructor.
00104 };
00105 
00106 nsresult
00107 NS_NewXBLProtoImpl(nsXBLPrototypeBinding* aBinding, 
00108                    const PRUnichar* aClassName, 
00109                    nsXBLProtoImpl** aResult);
00110 
00111 #endif // nsXBLProtoImpl_h__