src/translation.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2017 Nore, Nathanaël Courant <nore@mesecons.net>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "translation.h"
  21 #include "log.h"
  22 #include "util/string.h"
  23 #include <unordered_map>
  24
  25
  26 #ifndef SERVER
  27 // Client translations
  28 Translations client_translations;
  29 Translations *g_client_translations = &client_translations;
  30 #endif
  31
  32
  33 void Translations::clear()
  34 {
  35         m_translations.clear();
  36 }
  37
  38 const std::wstring &Translations::getTranslation(
  39                 const std::wstring &textdomain, const std::wstring &s)
  40 {
  41         std::wstring key = textdomain + L"|" + s;
  42         try {
  43                 return m_translations.at(key);
  44         } catch (const std::out_of_range &) {
  45                 verbosestream << "Translations: can't find translation for string \""
  46                               << wide_to_utf8(s) << "\" in textdomain \""
  47                               << wide_to_utf8(textdomain) << "\"" << std::endl;
  48                 // Silence that warning in the future
  49                 m_translations[key] = s;
  50                 return s;
  51         }
  52 }
  53
  54 void Translations::loadTranslation(const std::string &data)
  55 {
  56         std::istringstream is(data);
  57         std::wstring textdomain;
  58         std::string line;
  59
  60         while (is.good()) {
  61                 std::getline(is, line);
  62                 // Trim last character if file was using a \r\n line ending
  63                 if (line.length () > 0 && line[line.length() - 1] == '\r')
  64                         line.resize(line.length() - 1);
  65
  66                 if (str_starts_with(line, "# textdomain:")) {
  67                         textdomain = utf8_to_wide(trim(str_split(line, ':')[1]));
  68                 }
  69                 if (line.empty() || line[0] == '#')
  70                         continue;
  71
  72                 std::wstring wline = utf8_to_wide(line);
  73                 if (wline.empty())
  74                         continue;
  75
  76                 // Read line
  77                 // '=' marks the key-value pair, but may be escaped by an '@'.
  78                 // '\n' may also be escaped by '@'.
  79                 // All other escapes are preserved.
  80
  81                 size_t i = 0;
  82                 std::wostringstream word1, word2;
  83                 while (i < wline.length() && wline[i] != L'=') {
  84                         if (wline[i] == L'@') {
  85                                 if (i + 1 < wline.length()) {
  86                                         if (wline[i + 1] == L'=') {
  87                                                 word1.put(L'=');
  88                                         } else if (wline[i + 1] == L'n') {
  89                                                 word1.put(L'\n');
  90                                         } else {
  91                                                 word1.put(L'@');
  92                                                 word1.put(wline[i + 1]);
  93                                         }
  94                                         i += 2;
  95                                 } else {
  96                                         // End of line, go to the next one.
  97                                         word1.put(L'\n');
  98                                         if (!is.good()) {
  99                                                 break;
 100                                         }
 101                                         i = 0;
 102                                         std::getline(is, line);
 103                                         wline = utf8_to_wide(line);
 104                                 }
 105                         } else {
 106                                 word1.put(wline[i]);
 107                                 i++;
 108                         }
 109                 }
 110
 111                 if (i == wline.length()) {
 112                         errorstream << "Malformed translation line \"" << line << "\""
 113                                     << std::endl;
 114                         continue;
 115                 }
 116                 i++;
 117
 118                 while (i < wline.length()) {
 119                         if (wline[i] == L'@') {
 120                                 if (i + 1 < wline.length()) {
 121                                         if (wline[i + 1] == L'=') {
 122                                                 word2.put(L'=');
 123                                         } else if (wline[i + 1] == L'n') {
 124                                                 word2.put(L'\n');
 125                                         } else {
 126                                                 word2.put(L'@');
 127                                                 word2.put(wline[i + 1]);
 128                                         }
 129                                         i += 2;
 130                                 } else {
 131                                         // End of line, go to the next one.
 132                                         word2.put(L'\n');
 133                                         if (!is.good()) {
 134                                                 break;
 135                                         }
 136                                         i = 0;
 137                                         std::getline(is, line);
 138                                         wline = utf8_to_wide(line);
 139                                 }
 140                         } else {
 141                                 word2.put(wline[i]);
 142                                 i++;
 143                         }
 144                 }
 145
 146                 std::wstring oword1 = word1.str(), oword2 = word2.str();
 147                 if (oword2.empty()) {
 148                         oword2 = oword1;
 149                         errorstream << "Ignoring empty translation for \""
 150                                     << wide_to_utf8(oword1) << "\"" << std::endl;
 151                 }
 152
 153                 std::wstring translation_index = textdomain + L"|";
 154                 translation_index.append(oword1);
 155                 m_translations[translation_index] = oword2;
 156         }
 157 }