1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is the Mozilla XTF project.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Alex Fritze.
19 : * Portions created by the Initial Developer are Copyright (C) 2004
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : * Alex Fritze <alex@croczilla.com> (original author)
24 : *
25 : * Alternatively, the contents of this file may be used under the terms of
26 : * either the GNU General Public License Version 2 or later (the "GPL"), or
27 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 : * in which case the provisions of the GPL or the LGPL are applicable instead
29 : * of those above. If you wish to allow use of your version of this file only
30 : * under the terms of either the GPL or the LGPL, and not to allow others to
31 : * use your version of this file under the terms of the MPL, indicate your
32 : * decision by deleting the provisions above and replace them with the notice
33 : * and other provisions required by the GPL or the LGPL. If you do not delete
34 : * the provisions above, a recipient may use your version of this file under
35 : * the terms of any one of the MPL, the GPL or the LGPL.
36 : *
37 : * ***** END LICENSE BLOCK ***** */
38 :
39 : #include "nsCOMPtr.h"
40 : #include "nsXPTCUtils.h"
41 : #include "nsIInterfaceInfo.h"
42 : #include "nsIInterfaceInfoManager.h"
43 : #include "nsServiceManagerUtils.h"
44 : #include "nsAutoPtr.h"
45 : #ifdef DEBUG
46 : #include <stdio.h>
47 : #endif
48 :
49 : ////////////////////////////////////////////////////////////////////////
50 : // nsXTFWeakTearoff class
51 :
52 : class nsXTFWeakTearoff : protected nsAutoXPTCStub
53 : {
54 : protected:
55 : ~nsXTFWeakTearoff();
56 :
57 : public:
58 : nsXTFWeakTearoff(const nsIID& iid,
59 : nsISupports* obj,
60 : nsresult *rv);
61 :
62 : // nsISupports interface
63 : NS_DECL_ISUPPORTS
64 :
65 : NS_IMETHOD CallMethod(PRUint16 methodIndex,
66 : const XPTMethodDescriptor* info,
67 : nsXPTCMiniVariant* params);
68 :
69 : private:
70 : nsISupports *mObj;
71 : nsIID mIID;
72 : };
73 :
74 : //----------------------------------------------------------------------
75 : // implementation:
76 :
77 2 : nsXTFWeakTearoff::nsXTFWeakTearoff(const nsIID& iid,
78 : nsISupports* obj,
79 : nsresult *rv)
80 2 : : mObj(obj), mIID(iid)
81 : {
82 2 : MOZ_COUNT_CTOR(nsXTFWeakTearoff);
83 :
84 2 : *rv = InitStub(iid);
85 2 : }
86 :
87 0 : nsXTFWeakTearoff::~nsXTFWeakTearoff()
88 : {
89 0 : MOZ_COUNT_DTOR(nsXTFWeakTearoff);
90 0 : }
91 :
92 : nsresult
93 2 : NS_NewXTFWeakTearoff(const nsIID& iid,
94 : nsISupports* obj,
95 : nsISupports** aResult){
96 2 : NS_PRECONDITION(aResult != nsnull, "null ptr");
97 2 : if (!aResult)
98 0 : return NS_ERROR_NULL_POINTER;
99 :
100 : nsresult rv;
101 :
102 : nsRefPtr<nsXTFWeakTearoff> result =
103 4 : new nsXTFWeakTearoff(iid, obj, &rv);
104 2 : if (!result)
105 0 : return NS_ERROR_OUT_OF_MEMORY;
106 :
107 2 : if (NS_FAILED(rv))
108 0 : return rv;
109 :
110 2 : return result->QueryInterface(iid, (void**) aResult);
111 : }
112 :
113 : //----------------------------------------------------------------------
114 : // nsISupports implementation
115 :
116 8 : NS_IMPL_ADDREF(nsXTFWeakTearoff)
117 6 : NS_IMPL_RELEASE(nsXTFWeakTearoff)
118 :
119 : NS_IMETHODIMP
120 16 : nsXTFWeakTearoff::QueryInterface(REFNSIID aIID, void** aInstancePtr)
121 : {
122 16 : NS_PRECONDITION(aInstancePtr, "null out param");
123 :
124 16 : if (aIID.Equals(mIID) || aIID.Equals(NS_GET_IID(nsISupports))) {
125 4 : *aInstancePtr = mXPTCStub;
126 4 : NS_ADDREF_THIS();
127 4 : return NS_OK;
128 : }
129 : // we can't map QI onto the obj, because the xpcom wrapper otherwise
130 : // QI-accumulates all interfaces defined on mObj
131 : // else return mObj->QueryInterface(aIID, aInstancePtr);
132 12 : *aInstancePtr = nsnull;
133 12 : return NS_ERROR_NO_INTERFACE;
134 : }
135 :
136 : NS_IMETHODIMP
137 2 : nsXTFWeakTearoff::CallMethod(PRUint16 methodIndex,
138 : const XPTMethodDescriptor* info,
139 : nsXPTCMiniVariant* params)
140 : {
141 2 : NS_ASSERTION(methodIndex >= 3,
142 : "huh? indirect nsISupports method call unexpected");
143 :
144 : // prepare args:
145 2 : int paramCount = info->num_args;
146 : nsXPTCVariant* fullPars;
147 2 : if (!paramCount) {
148 0 : fullPars = nsnull;
149 : }
150 : else {
151 4 : fullPars = new nsXPTCVariant[paramCount];
152 2 : if (!fullPars)
153 0 : return NS_ERROR_OUT_OF_MEMORY;
154 : }
155 :
156 4 : for (int i=0; i<paramCount; ++i) {
157 2 : const nsXPTParamInfo& paramInfo = info->params[i];
158 2 : uint8 flags = paramInfo.IsOut() ? nsXPTCVariant::PTR_IS_DATA : 0;
159 2 : fullPars[i].Init(params[i], paramInfo.GetType(), flags);
160 : }
161 :
162 : // make the call:
163 2 : nsresult rv = NS_InvokeByIndex(mObj, methodIndex, paramCount, fullPars);
164 2 : if (fullPars)
165 2 : delete []fullPars;
166 2 : return rv;
167 : }
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