1 // locale.cxx -- FlightGear Localization Support
3 // Written by Thorsten Brehm, started April 2012.
5 // Copyright (C) 2012 Thorsten Brehm - brehmt (at) gmail com
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
25 #include <simgear/props/props_io.hxx>
26 #include <simgear/structure/exception.hxx>
28 #include "fg_props.hxx"
34 FGLocale::FGLocale(SGPropertyNode* root) :
35 _intl(root->getNode("/sim/intl",0, true)),
36 _defaultLocale(_intl->getChild("locale",0, true))
46 * Determine locale/language settings on Windows.
48 * Copyright (C) 1997, 2002, 2003 Martin von Loewis
50 * Permission to use, copy, modify, and distribute this software and its
51 * documentation for any purpose and without fee is hereby granted,
52 * provided that the above copyright notice appear in all copies.
54 * This software comes with no warranty. Use at your own risk.
57 FGLocale::getUserLanguage()
59 static char locale[100] = {0};
61 if (GetLocaleInfo(LOCALE_USER_DEFAULT,
62 LOCALE_SISO639LANGNAME,
63 locale, sizeof(locale)))
65 SG_LOG(SG_GENERAL, SG_INFO, "Detected locale's language setting: " << locale);
66 size_t i = strlen(locale);
68 if (GetLocaleInfo(LOCALE_USER_DEFAULT,
69 LOCALE_SISO3166CTRYNAME,
70 locale+i, (int)(sizeof(locale)-i)))
74 SG_LOG(SG_GENERAL, SG_INFO, "Failed to detected locale's country setting.");
78 SG_LOG(SG_GENERAL, SG_INFO, "Failed to obtain Windows locale information.");
83 * Determine locale/language settings on Linux (and Mac?).
86 FGLocale::getUserLanguage()
88 return ::getenv("LANG");
92 // Search property tree for matching locale description
94 FGLocale::findLocaleNode(const string& language)
96 SGPropertyNode* node = NULL;
98 // remove character encoding from the locale spec, i.e. "de_DE.utf8" => "de_DE"
99 size_t pos = language.find(".");
100 if ((pos != string::npos)&&(pos>0))
102 node = findLocaleNode(language.substr(0, pos));
107 SG_LOG(SG_GENERAL, SG_INFO, "Searching language resource for locale: " << language);
108 // search locale using full string
109 vector<SGPropertyNode_ptr> localeList = _intl->getChildren("locale");
111 for (size_t i = 0; i < localeList.size(); i++)
113 vector<SGPropertyNode_ptr> langList = localeList[i]->getChildren("lang");
115 for (size_t j = 0; j < langList.size(); j++)
117 if (!language.compare(langList[j]->getStringValue()))
119 SG_LOG(SG_GENERAL, SG_INFO, "Found language resource for: " << language);
120 return localeList[i];
125 // try country's default resource, i.e. "de_DE" => "de"
126 pos = language.find("_");
127 if ((pos != string::npos)&&(pos>0))
129 node = findLocaleNode(language.substr(0, pos));
137 // Select the language. When no language is given (NULL),
138 // a default is determined matching the system locale.
140 FGLocale::selectLanguage(const char *language)
142 // Use system setting when no language is given.
143 if ((language == NULL)||(language[0]==0))
145 language = getUserLanguage();
146 SG_LOG(SG_GENERAL, SG_INFO, "System language: " << ((language) ? language : "<unavailable>"));
149 // Use plain C locale if nothing is available.
150 if ((language == NULL)||(language[0]==0))
152 SG_LOG(SG_GENERAL, SG_INFO, "Unable to detect system language" );
156 SGPropertyNode *locale = findLocaleNode(language);
159 SG_LOG(SG_GENERAL, SG_ALERT,
160 "No internationalization settings specified in preferences.xml" );
164 _currentLocale = locale;
168 // Load strings for requested resource and locale.
169 // Result is stored below "strings" in the property tree of the given locale.
171 FGLocale::loadResource(SGPropertyNode* localeNode, const char* resource)
173 SGPath path( globals->get_fg_root() );
175 SGPropertyNode* stringNode = localeNode->getNode("strings", 0, true);
177 const char *path_str = stringNode->getStringValue(resource, NULL);
180 SG_LOG(SG_GENERAL, SG_WARN, "No path in " << stringNode->getPath() << "/" << resource << ".");
184 path.append(path_str);
185 SG_LOG(SG_GENERAL, SG_INFO, "Reading localized strings for '" <<
186 localeNode->getStringValue("lang", "<none>")
187 <<"' from " << path.str());
189 // load the actual file
192 readProperties(path.str(), stringNode->getNode(resource, 0, true));
193 } catch (const sg_exception &e)
195 SG_LOG(SG_GENERAL, SG_ALERT, "Unable to read the localized strings from " << path.str() <<
196 ". Error: " << e.getFormattedMessage());
203 // Load strings for requested resource (for current and default locale).
204 // Result is stored below "strings" in the property tree of the locales.
206 FGLocale::loadResource(const char* resource)
208 // load defaults first
209 bool Ok = loadResource(_defaultLocale, resource);
211 // also load language specific resource, unless identical
212 if ((_currentLocale!=0)&&
213 (_defaultLocale != _currentLocale))
215 Ok &= loadResource(_currentLocale, resource);
222 FGLocale::getLocalizedString(SGPropertyNode *localeNode, const char* id, const char* context)
224 SGPropertyNode *n = localeNode->getNode("strings",0, true)->getNode(context);
226 return n->getStringValue(id, NULL);
231 FGLocale::getLocalizedString(const char* id, const char* resource, const char* Default)
235 const char* s = NULL;
237 s = getLocalizedString(_currentLocale, id, resource);
242 s = getLocalizedString(_defaultLocale, id, resource);
249 simgear::PropertyList
250 FGLocale::getLocalizedStrings(SGPropertyNode *localeNode, const char* id, const char* context)
252 SGPropertyNode *n = localeNode->getNode("strings",0, true)->getNode(context);
255 return n->getChildren(id);
257 return simgear::PropertyList();
260 simgear::PropertyList
261 FGLocale::getLocalizedStrings(const char* id, const char* resource)
267 simgear::PropertyList s = getLocalizedStrings(_currentLocale, id, resource);
274 simgear::PropertyList s = getLocalizedStrings(_defaultLocale, id, resource);
279 return simgear::PropertyList();
282 // Check for localized font
284 FGLocale::getDefaultFont(const char* fallbackFont)
286 const char* font = NULL;
289 font = _currentLocale->getStringValue("font", "");
295 font = _defaultLocale->getStringValue("font", "");
303 // Simple UTF8 to Latin1 encoder.
304 void FGLocale::utf8toLatin1(string& s)
308 // map '0xc3..' utf8 characters to Latin1
309 while ((string::npos != (pos = s.find('\xc3',pos)))&&
313 unsigned char p = s[pos+1];
314 if ((p>=0x80)&&(p<0xc0))
319 s.replace(pos, 2, v);
323 #ifdef DEBUG_ENCODING
324 printf("'%s': ", s.c_str());
325 for (pos = 0;pos<s.size();pos++)
326 printf("%02x ", (unsigned char) s[pos]);
330 // hack: also map some Latin2 characters to plain-text ASCII
332 while ((string::npos != (pos = s.find('\xc5',pos)))&&
336 unsigned char p = s[pos+1];
339 case 0x82:c='l';break;
340 case 0x9a:c='S';break;
341 case 0x9b:c='s';break;
342 case 0xba:c='z';break;
343 case 0xbc:c='z';break;
348 s.replace(pos, 2, v);