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                         auto parts = str_split(line, ':');
  68                         if (parts.size() < 2) {
  69                                 errorstream << "Invalid textdomain translation line \"" << line
  70                                                 << "\"" << std::endl;
  71                                 continue;
  72                         }
  73                         textdomain = utf8_to_wide(trim(parts[1]));
  74                 }
  75                 if (line.empty() || line[0] == '#')
  76                         continue;
  77
  78                 std::wstring wline = utf8_to_wide(line);
  79                 if (wline.empty())
  80                         continue;
  81
  82                 // Read line
  83                 // '=' marks the key-value pair, but may be escaped by an '@'.
  84                 // '\n' may also be escaped by '@'.
  85                 // All other escapes are preserved.
  86
  87                 size_t i = 0;
  88                 std::wostringstream word1, word2;
  89                 while (i < wline.length() && wline[i] != L'=') {
  90                         if (wline[i] == L'@') {
  91                                 if (i + 1 < wline.length()) {
  92                                         if (wline[i + 1] == L'=') {
  93                                                 word1.put(L'=');
  94                                         } else if (wline[i + 1] == L'n') {
  95                                                 word1.put(L'\n');
  96                                         } else {
  97                                                 word1.put(L'@');
  98                                                 word1.put(wline[i + 1]);
  99                                         }
 100                                         i += 2;
 101                                 } else {
 102                                         // End of line, go to the next one.
 103                                         word1.put(L'\n');
 104                                         if (!is.good()) {
 105                                                 break;
 106                                         }
 107                                         i = 0;
 108                                         std::getline(is, line);
 109                                         wline = utf8_to_wide(line);
 110                                 }
 111                         } else {
 112                                 word1.put(wline[i]);
 113                                 i++;
 114                         }
 115                 }
 116
 117                 if (i == wline.length()) {
 118                         errorstream << "Malformed translation line \"" << line << "\""
 119                                     << std::endl;
 120                         continue;
 121                 }
 122                 i++;
 123
 124                 while (i < wline.length()) {
 125                         if (wline[i] == L'@') {
 126                                 if (i + 1 < wline.length()) {
 127                                         if (wline[i + 1] == L'=') {
 128                                                 word2.put(L'=');
 129                                         } else if (wline[i + 1] == L'n') {
 130                                                 word2.put(L'\n');
 131                                         } else {
 132                                                 word2.put(L'@');
 133                                                 word2.put(wline[i + 1]);
 134                                         }
 135                                         i += 2;
 136                                 } else {
 137                                         // End of line, go to the next one.
 138                                         word2.put(L'\n');
 139                                         if (!is.good()) {
 140                                                 break;
 141                                         }
 142                                         i = 0;
 143                                         std::getline(is, line);
 144                                         wline = utf8_to_wide(line);
 145                                 }
 146                         } else {
 147                                 word2.put(wline[i]);
 148                                 i++;
 149                         }
 150                 }
 151
 152                 std::wstring oword1 = word1.str(), oword2 = word2.str();
 153                 if (!oword2.empty()) {
 154                         std::wstring translation_index = textdomain + L"|";
 155                         translation_index.append(oword1);
 156                         m_translations[translation_index] = oword2;
 157                 } else {
 158                         infostream << "Ignoring empty translation for \""
 159                                 << wide_to_utf8(oword1) << "\"" << std::endl;
 160                 }
 161         }
 162 }