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
  24 static Translations main_translations;
  25 Translations *g_translations = &main_translations;
  26
  27 Translations::~Translations()
  28 {
  29         clear();
  30 }
  31
  32 void Translations::clear()
  33 {
  34         m_translations.clear();
  35 }
  36
  37 const std::wstring &Translations::getTranslation(
  38                 const std::wstring &textdomain, const std::wstring &s)
  39 {
  40         std::wstring key = textdomain + L"|" + s;
  41         try {
  42                 return m_translations.at(key);
  43         } catch (const std::out_of_range &) {
  44                 verbosestream << "Translations: can't find translation for string \""
  45                               << wide_to_utf8(s) << "\" in textdomain \""
  46                               << wide_to_utf8(textdomain) << "\"" << std::endl;
  47                 // Silence that warning in the future
  48                 m_translations[key] = s;
  49                 return s;
  50         }
  51 }
  52
  53 void Translations::loadTranslation(const std::string &data)
  54 {
  55         std::istringstream is(data);
  56         std::wstring textdomain;
  57         std::string line;
  58
  59         while (is.good()) {
  60                 std::getline(is, line);
  61                 // Trim last character if file was using a \r\n line ending
  62                 if (line.length () > 0 && line[line.length() - 1] == '\r')
  63                         line.resize(line.length() - 1);
  64
  65                 if (str_starts_with(line, "# textdomain:")) {
  66                         textdomain = utf8_to_wide(trim(str_split(line, ':')[1]));
  67                 }
  68                 if (line.empty() || line[0] == '#')
  69                         continue;
  70
  71                 std::wstring wline = utf8_to_wide(line);
  72                 if (wline.empty())
  73                         continue;
  74
  75                 // Read line
  76                 // '=' marks the key-value pair, but may be escaped by an '@'.
  77                 // '\n' may also be escaped by '@'.
  78                 // All other escapes are preserved.
  79
  80                 size_t i = 0;
  81                 std::wostringstream word1, word2;
  82                 while (i < wline.length() && wline[i] != L'=') {
  83                         if (wline[i] == L'@') {
  84                                 if (i + 1 < wline.length()) {
  85                                         if (wline[i + 1] == L'=') {
  86                                                 word1.put(L'=');
  87                                         } else if (wline[i + 1] == L'n') {
  88                                                 word1.put(L'\n');
  89                                         } else {
  90                                                 word1.put(L'@');
  91                                                 word1.put(wline[i + 1]);
  92                                         }
  93                                         i += 2;
  94                                 } else {
  95                                         // End of line, go to the next one.
  96                                         word1.put(L'\n');
  97                                         if (!is.good()) {
  98                                                 break;
  99                                         }
 100                                         i = 0;
 101                                         std::getline(is, line);
 102                                         wline = utf8_to_wide(line);
 103                                 }
 104                         } else {
 105                                 word1.put(wline[i]);
 106                                 i++;
 107                         }
 108                 }
 109
 110                 if (i == wline.length()) {
 111                         errorstream << "Malformed translation line \"" << line << "\""
 112                                     << std::endl;
 113                         continue;
 114                 }
 115                 i++;
 116
 117                 while (i < wline.length()) {
 118                         if (wline[i] == L'@') {
 119                                 if (i + 1 < wline.length()) {
 120                                         if (wline[i + 1] == L'=') {
 121                                                 word2.put(L'=');
 122                                         } else if (wline[i + 1] == L'n') {
 123                                                 word2.put(L'\n');
 124                                         } else {
 125                                                 word2.put(L'@');
 126                                                 word2.put(wline[i + 1]);
 127                                         }
 128                                         i += 2;
 129                                 } else {
 130                                         // End of line, go to the next one.
 131                                         word2.put(L'\n');
 132                                         if (!is.good()) {
 133                                                 break;
 134                                         }
 135                                         i = 0;
 136                                         std::getline(is, line);
 137                                         wline = utf8_to_wide(line);
 138                                 }
 139                         } else {
 140                                 word2.put(wline[i]);
 141                                 i++;
 142                         }
 143                 }
 144
 145                 std::wstring oword1 = word1.str(), oword2 = word2.str();
 146                 if (oword2.empty()) {
 147                         oword2 = oword1;
 148                         errorstream << "Ignoring empty translation for \""
 149                                     << wide_to_utf8(oword1) << "\"" << std::endl;
 150                 }
 151
 152                 std::wstring translation_index = textdomain + L"|";
 153                 translation_index.append(oword1);
 154                 m_translations[translation_index] = oword2;
 155         }
 156 }