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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #include "osl/interlck.h"
21 : #include "rtl/ustring.hxx"
22 : #include "uno/environment.hxx"
23 : #include "uno/mapping.hxx"
24 : #include "uno/dispatcher.h"
25 :
26 : #include "cppu/EnvDcp.hxx"
27 :
28 :
29 : #ifdef LOG_LIFECYLE_MediatorMapping
30 : # include <iostream>
31 : # define LOG_LIFECYLE_MediatorMapping_emit(x) x
32 :
33 : #else
34 : # define LOG_LIFECYLE_MediatorMapping_emit(x)
35 :
36 : #endif
37 :
38 :
39 : using namespace com::sun::star;
40 :
41 : class MediatorMapping : public uno_Mapping
42 : {
43 : oslInterlockedCount m_refCount;
44 :
45 : uno::Mapping m_from2uno;
46 : uno::Mapping m_uno2to;
47 :
48 : uno::Environment m_from;
49 : uno::Environment m_interm;
50 : uno::Environment m_to;
51 :
52 : public:
53 : void acquire(void);
54 : void release(void);
55 :
56 : void mapInterface(void ** ppOut,
57 : void * pInterface,
58 : typelib_InterfaceTypeDescription * pInterfaceTypeDescr);
59 : MediatorMapping(uno_Environment * pFrom,
60 : uno_Environment * pInterm,
61 : uno_Environment * pTo);
62 : ~MediatorMapping();
63 : };
64 :
65 : extern "C" {
66 0 : static void SAL_CALL s_acquire(uno_Mapping * mapping)
67 : {
68 0 : MediatorMapping * pMediatorMapping = static_cast<MediatorMapping *>(mapping);
69 0 : pMediatorMapping->acquire();
70 0 : }
71 :
72 0 : static void SAL_CALL s_release(uno_Mapping * mapping)
73 : {
74 0 : MediatorMapping * pMediatorMapping = static_cast<MediatorMapping *>(mapping);
75 0 : pMediatorMapping->release();
76 0 : }
77 :
78 0 : static void SAL_CALL s_mapInterface(
79 : uno_Mapping * mapping,
80 : void ** ppOut,
81 : void * pInterface,
82 : typelib_InterfaceTypeDescription * pInterfaceTypeDescr)
83 : {
84 0 : MediatorMapping * pMediatorMapping = static_cast<MediatorMapping *>(mapping);
85 0 : pMediatorMapping->mapInterface(ppOut, pInterface, pInterfaceTypeDescr);
86 0 : }
87 : }
88 :
89 0 : MediatorMapping::MediatorMapping(uno_Environment * pFrom,
90 : uno_Environment * pInterm,
91 : uno_Environment * pTo)
92 : : m_refCount(0),
93 : m_from2uno(pFrom, pInterm),
94 : m_uno2to (pInterm, pTo),
95 : m_from (pFrom),
96 : m_interm (pInterm),
97 0 : m_to (pTo)
98 : {
99 : LOG_LIFECYLE_MediatorMapping_emit(std::cerr << __FUNCTION__ << std::endl);
100 :
101 0 : if (!m_from2uno.get() || !m_uno2to.get())
102 0 : abort();
103 :
104 0 : uno_Mapping::acquire = s_acquire;
105 0 : uno_Mapping::release = s_release;
106 0 : uno_Mapping::mapInterface = s_mapInterface;
107 0 : }
108 :
109 0 : MediatorMapping::~MediatorMapping()
110 : {
111 : LOG_LIFECYLE_MediatorMapping_emit(std::cerr << __FUNCTION__ << std::endl);
112 0 : }
113 :
114 0 : void MediatorMapping::acquire(void)
115 : {
116 : LOG_LIFECYLE_MediatorMapping_emit(std::cerr << __FUNCTION__ << std::endl);
117 :
118 0 : osl_atomic_increment(&m_refCount);
119 0 : }
120 :
121 0 : void MediatorMapping::release(void)
122 : {
123 : LOG_LIFECYLE_MediatorMapping_emit(std::cerr << __FUNCTION__ << std::endl);
124 :
125 0 : if (osl_atomic_decrement(&m_refCount) == 0)
126 : {
127 0 : ::uno_revokeMapping(this);
128 : }
129 0 : }
130 :
131 0 : extern "C" { static void s_mapInterface_v(va_list * pParam)
132 : {
133 0 : void ** ppOut = va_arg(*pParam, void **);
134 0 : void * pInterface = va_arg(*pParam, void *);
135 0 : typelib_InterfaceTypeDescription * pInterfaceTypeDescr = va_arg(*pParam, typelib_InterfaceTypeDescription *);
136 0 : uno_Mapping * pMapping = va_arg(*pParam, uno_Mapping *);
137 :
138 0 : pMapping->mapInterface(pMapping, ppOut, pInterface, pInterfaceTypeDescr);
139 0 : }}
140 :
141 0 : void MediatorMapping::mapInterface(
142 : void ** ppOut,
143 : void * pInterface,
144 : typelib_InterfaceTypeDescription * pInterfaceTypeDescr)
145 : {
146 0 : if (*ppOut != 0)
147 : {
148 0 : uno_ExtEnvironment * env = m_to.get()->pExtEnv;
149 : OSL_ASSERT( env != 0 );
150 0 : env->releaseInterface( env, *ppOut );
151 0 : *ppOut = NULL;
152 : }
153 :
154 0 : void * ret = 0;
155 0 : uno_Interface * pUnoI = 0;
156 :
157 0 : m_from.invoke(s_mapInterface_v, &pUnoI, pInterface, pInterfaceTypeDescr, m_from2uno.get());
158 :
159 0 : m_uno2to.mapInterface(&ret, pUnoI, pInterfaceTypeDescr);
160 :
161 0 : if (pUnoI)
162 0 : m_interm.get()->pExtEnv->releaseInterface(m_interm.get()->pExtEnv, pUnoI);
163 :
164 0 : *ppOut = ret;
165 0 : }
166 :
167 0 : extern "C" { static void SAL_CALL s_MediatorMapping_free(uno_Mapping * pMapping)
168 : SAL_THROW_EXTERN_C()
169 : {
170 0 : delete static_cast<MediatorMapping *>(pMapping);
171 0 : }}
172 :
173 :
174 :
175 0 : static rtl::OUString getPrefix(rtl::OUString const & str1, rtl::OUString const & str2)
176 : {
177 0 : sal_Int32 nIndex1 = 0;
178 0 : sal_Int32 nIndex2 = 0;
179 0 : sal_Int32 sim = 0;
180 :
181 0 : rtl::OUString token1;
182 0 : rtl::OUString token2;
183 :
184 0 : do
185 : {
186 0 : token1 = str1.getToken(0, ':', nIndex1);
187 0 : token2 = str2.getToken(0, ':', nIndex2);
188 :
189 0 : if (token1.equals(token2))
190 0 : sim += token1.getLength() + 1;
191 : }
192 0 : while(nIndex1 == nIndex2 && nIndex1 >= 0 && token1.equals(token2));
193 :
194 0 : rtl::OUString result;
195 :
196 0 : if (sim)
197 0 : result = str1.copy(0, sim - 1);
198 :
199 0 : return result;
200 : }
201 :
202 : // rtl::OUString str1(RTL_CONSTASCII_USTRINGPARAM("abc:def:ghi"));
203 : // rtl::OUString str2(RTL_CONSTASCII_USTRINGPARAM("abc:def"));
204 : // rtl::OUString str3(RTL_CONSTASCII_USTRINGPARAM("abc"));
205 : // rtl::OUString str4(RTL_CONSTASCII_USTRINGPARAM(""));
206 :
207 : // rtl::OUString pref;
208 :
209 : // pref = getPrefix(str1, str1);
210 : // pref = getPrefix(str1, str2);
211 : // pref = getPrefix(str1, str3);
212 : // pref = getPrefix(str1, str4);
213 :
214 : // pref = getPrefix(str2, str1);
215 : // pref = getPrefix(str3, str1);
216 : // pref = getPrefix(str4, str1);
217 :
218 :
219 6474 : void getCascadeMapping(uno_Mapping ** ppMapping,
220 : uno_Environment * pFrom,
221 : uno_Environment * pTo,
222 : rtl_uString * pAddPurpose)
223 : {
224 6474 : if (pAddPurpose && pAddPurpose->length)
225 : return;
226 :
227 6474 : rtl::OUString uno_envType(RTL_CONSTASCII_USTRINGPARAM(UNO_LB_UNO));
228 :
229 6474 : rtl::OUString from_envType = cppu::EnvDcp::getTypeName(pFrom->pTypeName);
230 6474 : rtl::OUString to_envType = cppu::EnvDcp::getTypeName(pTo->pTypeName);
231 6474 : rtl::OUString from_envPurpose = cppu::EnvDcp::getPurpose(pFrom->pTypeName);
232 6474 : rtl::OUString to_envPurpose = cppu::EnvDcp::getPurpose(pTo->pTypeName);
233 :
234 : #ifdef LOG_CALLING_named_purpose_getMapping
235 : rtl::OString s_from_name = rtl::OUStringToOString(pFrom->pTypeName, RTL_TEXTENCODING_ASCII_US);
236 : rtl::OString s_to_name = rtl::OUStringToOString(pTo->pTypeName, RTL_TEXTENCODING_ASCII_US);
237 :
238 : std::cerr << __FUNCTION__ << " - creating mediation ";
239 : std::cerr << "pFrom: " << s_from_name.getStr();
240 : std::cerr <<" pTo: " << s_to_name.getStr() << std::endl;
241 : #endif
242 :
243 6474 : if (from_envPurpose == to_envPurpose) // gcc:bla => uno:bla
244 : return;
245 :
246 : // reaching this point means, we need a mediated mapping!!!
247 : // we generall mediate via uno[:free]
248 0 : uno_Environment * pInterm = NULL;
249 :
250 : // chained uno -> uno
251 0 : if (from_envType == uno_envType && to_envType == uno_envType)
252 : {
253 0 : rtl::OUString purpose = getPrefix(from_envPurpose, to_envPurpose);
254 :
255 0 : rtl::OUString uno_envDcp = uno_envType;
256 0 : uno_envDcp += purpose;
257 :
258 : // direct mapping possible?
259 : // uno:bla-->uno:bla:blubb
260 0 : if (from_envPurpose.equals(purpose))
261 : {
262 0 : rtl::OUString rest = to_envPurpose.copy(purpose.getLength());
263 :
264 0 : sal_Int32 index = rest.indexOf(':', 1);
265 0 : if (index == -1)
266 : {
267 0 : uno_getMapping(ppMapping, pFrom, pTo, rest.copy(1).pData);
268 : return;
269 : }
270 :
271 0 : uno_envDcp += rest.copy(0, index);
272 : }
273 0 : else if (to_envPurpose.equals(purpose))
274 : {
275 0 : rtl::OUString rest = from_envPurpose.copy(purpose.getLength());
276 :
277 0 : sal_Int32 index = rest.indexOf(':', 1);
278 0 : if (index == -1)
279 : {
280 0 : uno_getMapping(ppMapping, pFrom, pTo, rest.copy(1).pData);
281 : return;
282 : }
283 :
284 0 : uno_envDcp += rest.copy(0, index);
285 : }
286 :
287 0 : uno_getEnvironment(&pInterm, uno_envDcp.pData, NULL);
288 : }
289 0 : else if (from_envType != uno_envType && to_envType == uno_envType) // <ANY> -> UNO ?
290 : // mediate via uno:purpose(fromEnv)
291 : {
292 0 : rtl::OUString envDcp = uno_envType;
293 :
294 0 : envDcp += from_envPurpose;
295 0 : uno_getEnvironment(&pInterm, envDcp.pData, NULL);
296 : }
297 0 : else if (from_envType == uno_envType && to_envType != uno_envType) // UNO -> <ANY>?
298 : // mediate via uno(context)
299 : {
300 0 : rtl::OUString envDcp = uno_envType;
301 :
302 0 : envDcp += to_envPurpose;
303 0 : uno_getEnvironment(&pInterm, envDcp.pData, NULL);
304 : }
305 : else // everything else
306 : // mediate via uno:purpose
307 : {
308 0 : rtl::OUString purpose = getPrefix(from_envPurpose, to_envPurpose);
309 :
310 0 : rtl::OUString uno_envDcp = uno_envType;
311 0 : uno_envDcp += purpose;
312 :
313 0 : uno_getEnvironment(&pInterm, uno_envDcp.pData, NULL);
314 : }
315 :
316 0 : uno_Mapping * pMapping = new MediatorMapping(pFrom, pInterm, pTo);
317 0 : pInterm->release(pInterm);
318 :
319 :
320 0 : pMapping->acquire(pMapping);
321 :
322 0 : ::uno_registerMapping(&pMapping, s_MediatorMapping_free, pFrom, pTo, pAddPurpose);
323 :
324 0 : if (*ppMapping)
325 0 : (*ppMapping)->release(*ppMapping);
326 :
327 0 : *ppMapping = pMapping;
328 : }
329 :
330 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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