1 /**************************************************************
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20 *************************************************************/
21
22
23
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_vcl.hxx"
26
27 #include "osl/module.h"
28 #include "osl/process.h"
29
30 #include "rtl/ustrbuf.hxx"
31
32 #include "salinst.hxx"
33 #include "unx/saldata.hxx"
34 #include "vcl/printerinfomanager.hxx"
35
36 #include <cstdio>
37 #include <unistd.h>
38
39 using namespace rtl;
40
41 extern "C" {
42 typedef SalInstance*(*salFactoryProc)( oslModule pModule);
43 }
44
45 static oslModule pCloseModule = NULL;
46
47 enum {
48 DESKTOP_NONE = 0,
49 DESKTOP_UNKNOWN,
50 DESKTOP_GNOME,
51 DESKTOP_KDE,
52 DESKTOP_KDE4,
53 DESKTOP_CDE
54 };
55
56 static const char * desktop_strings[] = { "none", "unknown", "GNOME", "KDE", "KDE4", "CDE" };
57
tryInstance(const OUString & rModuleBase)58 static SalInstance* tryInstance( const OUString& rModuleBase )
59 {
60 SalInstance* pInst = NULL;
61
62 OUStringBuffer aModName( 128 );
63 aModName.appendAscii( SAL_DLLPREFIX"vclplug_" );
64 aModName.append( rModuleBase );
65 aModName.appendAscii( SAL_DLLPOSTFIX );
66 aModName.appendAscii( SAL_DLLEXTENSION );
67 OUString aModule = aModName.makeStringAndClear();
68
69 oslModule aMod = osl_loadModuleRelative(
70 reinterpret_cast< oslGenericFunction >( &tryInstance ), aModule.pData,
71 SAL_LOADMODULE_DEFAULT );
72 if( aMod )
73 {
74 salFactoryProc aProc = (salFactoryProc)osl_getAsciiFunctionSymbol( aMod, "create_SalInstance" );
75 if( aProc )
76 {
77 pInst = aProc( aMod );
78 #if OSL_DEBUG_LEVEL > 1
79 std::fprintf( stderr, "sal plugin %s produced instance %p\n",
80 OUStringToOString( aModule, RTL_TEXTENCODING_ASCII_US ).getStr(),
81 pInst );
82 #endif
83 if( pInst )
84 {
85 pCloseModule = aMod;
86
87 /*
88 * Recent GTK+ versions load their modules with RTLD_LOCAL, so we can
89 * not access the 'gnome_accessibility_module_shutdown' anymore.
90 * So make sure libgtk+ & co are still mapped into memory when
91 * atk-bridge's atexit handler gets called.
92 */
93 if( rModuleBase.equalsAscii("gtk") )
94 {
95 pCloseModule = NULL;
96 }
97 /*
98 * #i109007# KDE3 seems to have the same problem; an atexit cleanup
99 * handler, which cannot be resolved anymore if the plugin is already unloaded.
100 */
101 else if( rModuleBase.equalsAscii("kde") )
102 {
103 pCloseModule = NULL;
104 }
105
106 GetSalData()->m_pPlugin = aMod;
107 }
108 else
109 osl_unloadModule( aMod );
110 }
111 else
112 {
113 #if OSL_DEBUG_LEVEL > 1
114 std::fprintf( stderr, "could not load symbol %s from shared object %s\n",
115 "create_SalInstance",
116 OUStringToOString( aModule, RTL_TEXTENCODING_ASCII_US ).getStr() );
117 #endif
118 osl_unloadModule( aMod );
119 }
120 }
121 #if OSL_DEBUG_LEVEL > 1
122 else
123 std::fprintf( stderr, "could not load shared object %s\n",
124 OUStringToOString( aModule, RTL_TEXTENCODING_ASCII_US ).getStr() );
125 #endif
126
127 return pInst;
128 }
129
get_desktop_environment()130 static const rtl::OUString& get_desktop_environment()
131 {
132 static rtl::OUString aRet;
133 if( ! aRet.getLength() )
134 {
135 OUStringBuffer aModName( 128 );
136 aModName.appendAscii( SAL_DLLPREFIX"desktop_detector" );
137 aModName.appendAscii( SAL_DLLPOSTFIX );
138 aModName.appendAscii( SAL_DLLEXTENSION );
139 OUString aModule = aModName.makeStringAndClear();
140
141 oslModule aMod = osl_loadModuleRelative(
142 reinterpret_cast< oslGenericFunction >( &tryInstance ), aModule.pData,
143 SAL_LOADMODULE_DEFAULT );
144 if( aMod )
145 {
146 rtl::OUString (*pSym)() = (rtl::OUString(*)())
147 osl_getAsciiFunctionSymbol( aMod, "get_desktop_environment" );
148 if( pSym )
149 aRet = pSym();
150 }
151 osl_unloadModule( aMod );
152 }
153 return aRet;
154 }
155
autodetect_plugin()156 static SalInstance* autodetect_plugin()
157 {
158 static const char* pKDEFallbackList[] =
159 {
160 "kde4", "kde", "gtk", "gen", 0
161 };
162
163 static const char* pStandardFallbackList[] =
164 {
165 "gtk", "gen", 0
166 };
167
168 static const char* pHeadlessFallbackList[] =
169 {
170 "svp", 0
171 };
172
173 const rtl::OUString& desktop( get_desktop_environment() );
174 const char ** pList = pStandardFallbackList;
175 int nListEntry = 0;
176
177 // no server at all: dummy plugin
178 if ( desktop.equalsAscii( desktop_strings[DESKTOP_NONE] ) )
179 pList = pHeadlessFallbackList;
180 else if ( desktop.equalsAscii( desktop_strings[DESKTOP_GNOME] ) )
181 pList = pStandardFallbackList;
182 else if( desktop.equalsAscii( desktop_strings[DESKTOP_KDE] ) )
183 {
184 pList = pKDEFallbackList;
185 nListEntry = 1;
186 }
187 else if( desktop.equalsAscii( desktop_strings[DESKTOP_KDE4] ) )
188 pList = pKDEFallbackList;
189
190 SalInstance* pInst = NULL;
191 while( pList[nListEntry] && pInst == NULL )
192 {
193 rtl::OUString aTry( rtl::OUString::createFromAscii( pList[nListEntry] ) );
194 pInst = tryInstance( aTry );
195 #if OSL_DEBUG_LEVEL > 1
196 if( pInst )
197 std::fprintf( stderr, "plugin autodetection: %s\n", pList[nListEntry] );
198 #endif
199 nListEntry++;
200 }
201
202 return pInst;
203 }
204
check_headless_plugin()205 static SalInstance* check_headless_plugin()
206 {
207 int nParams = osl_getCommandArgCount();
208 OUString aParam;
209 for( int i = 0; i < nParams; i++ )
210 {
211 osl_getCommandArg( i, &aParam.pData );
212 if( aParam.equalsAscii( "-headless" ) )
213 return tryInstance( OUString( RTL_CONSTASCII_USTRINGPARAM( "svp" ) ) );
214 }
215 return NULL;
216 }
217
CreateSalInstance()218 SalInstance *CreateSalInstance()
219 {
220 SalInstance* pInst = NULL;
221
222 static const char* pUsePlugin = getenv( "SAL_USE_VCLPLUGIN" );
223
224 if( !(pUsePlugin && *pUsePlugin) )
225 pInst = check_headless_plugin();
226 else
227 pInst = tryInstance( OUString::createFromAscii( pUsePlugin ) );
228
229 if( ! pInst )
230 pInst = autodetect_plugin();
231
232 // fallback to gen
233 if( ! pInst )
234 pInst = tryInstance( OUString( RTL_CONSTASCII_USTRINGPARAM( "gen" ) ) );
235
236 if( ! pInst )
237 {
238 std::fprintf( stderr, "no suitable windowing system found, exiting.\n" );
239 _exit( 1 );
240 }
241
242 // acquire SolarMutex
243 pInst->AcquireYieldMutex( 1 );
244
245 return pInst;
246 }
247
DestroySalInstance(SalInstance * pInst)248 void DestroySalInstance( SalInstance *pInst )
249 {
250 // release SolarMutex
251 pInst->ReleaseYieldMutex();
252
253 delete pInst;
254 if( pCloseModule )
255 osl_unloadModule( pCloseModule );
256 }
257
InitSalData()258 void InitSalData()
259 {
260 }
261
DeInitSalData()262 void DeInitSalData()
263 {
264 }
265
InitSalMain()266 void InitSalMain()
267 {
268 }
269
DeInitSalMain()270 void DeInitSalMain()
271 {
272 }
273
SalAbort(const XubString & rErrorText)274 void SalAbort( const XubString& rErrorText )
275 {
276 if( !rErrorText.Len() )
277 std::fprintf( stderr, "Application Error" );
278 else
279 std::fprintf( stderr, "%s", ByteString( rErrorText, gsl_getSystemTextEncoding() ).GetBuffer() );
280 abort();
281 }
282
SalGetDesktopEnvironment()283 const OUString& SalGetDesktopEnvironment()
284 {
285 return get_desktop_environment();
286 }
287
SalData()288 SalData::SalData() :
289 m_pInstance(NULL),
290 m_pPlugin(NULL),
291 m_pPIManager(NULL)
292 {
293 }
294
~SalData()295 SalData::~SalData()
296 {
297 psp::PrinterInfoManager::release();
298 }
299