lingucomponent/source/lingutil/lingutil.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #if defined(_WIN32)
  21 #if !defined WIN32_LEAN_AND_MEAN
  22 # define WIN32_LEAN_AND_MEAN
  23 #endif
  24 #include <windows.h>
  25 #endif
  26
  27 #include <osl/thread.h>
  28 #include <osl/file.hxx>
  29 #include <osl/process.h>
  30 #include <tools/debug.hxx>
  31 #include <tools/urlobj.hxx>
  32 #include <i18nlangtag/languagetag.hxx>
  33 #include <i18nlangtag/mslangid.hxx>
  34 #include <unotools/bootstrap.hxx>
  35 #include <unotools/lingucfg.hxx>
  36 #include <unotools/pathoptions.hxx>
  37 #include <rtl/ustring.hxx>
  38 #include <rtl/string.hxx>
  39 #include <rtl/tencinfo.h>
  40 #include <linguistic/misc.hxx>
  41
  42 #include <set>
  43 #include <vector>
  44 #include <string.h>
  45
  46 #include "lingutil.hxx"
  47
  48 #include <sal/macros.h>
  49
  50 using namespace ::com::sun::star;
  51
  52 #if defined(_WIN32)
  53 OString Win_AddLongPathPrefix( const OString &rPathName )
  54 {
  55 #define WIN32_LONG_PATH_PREFIX "\\\\?\\"
  56   if (!rPathName.match(WIN32_LONG_PATH_PREFIX)) return WIN32_LONG_PATH_PREFIX + rPathName;
  57   return rPathName;
  58 }
  59 #endif //defined(WNT)
  60
  61 #ifdef SYSTEM_DICTS
  62 // find old style dictionaries in system directories
  63 void GetOldStyleDicsInDir(
  64     OUString const & aSystemDir, OUString const & aFormatName,
  65     OUString const & aSystemSuffix, OUString const & aSystemPrefix,
  66     std::set< OUString >& aDicLangInUse,
  67     std::vector< SvtLinguConfigDictionaryEntry >& aRes )
  68 {
  69     osl::Directory aSystemDicts(aSystemDir);
  70     if (aSystemDicts.open() == osl::FileBase::E_None)
  71     {
  72         osl::DirectoryItem aItem;
  73         osl::FileStatus aFileStatus(osl_FileStatus_Mask_FileURL);
  74         while (aSystemDicts.getNextItem(aItem) == osl::FileBase::E_None)
  75         {
  76             aItem.getFileStatus(aFileStatus);
  77             OUString sPath = aFileStatus.getFileURL();
  78             if (sPath.endsWith(aSystemSuffix))
  79             {
  80                 sal_Int32 nStartIndex = sPath.lastIndexOf('/') + 1;
  81                 if (!sPath.match(aSystemPrefix, nStartIndex))
  82                     continue;
  83                 OUString sChunk = sPath.copy(nStartIndex + aSystemPrefix.getLength(),
  84                     sPath.getLength() - aSystemSuffix.getLength() -
  85                     nStartIndex - aSystemPrefix.getLength());
  86                 if (sChunk.isEmpty())
  87                     continue;
  88
  89                 // We prefer (now) to use language tags.
  90                 // Avoid feeding in the older LANG_REGION scheme to the BCP47
  91                 // ctor as that triggers use of liblangtag and initializes its
  92                 // database which we do not want during startup. Convert
  93                 // instead.
  94                 sChunk = sChunk.replace( '_', '-');
  95
  96                 // There's a known exception to the rule, the dreaded
  97                 // hu_HU_u8.dic of the myspell-hu package, see
  98                 // http://packages.debian.org/search?arch=any&searchon=contents&keywords=hu_HU_u8.dic
  99                 // This was ignored because unknown in the old implementation,
 100                 // truncate to the known locale and either insert because hu_HU
 101                 // wasn't encountered yet, or skip because it was. It doesn't
 102                 // really matter because the proper new-style hu_HU dictionary
 103                 // will take precedence anyway if installed with a Hungarian
 104                 // languagepack. Again, this is only to not pull in all
 105                 // liblangtag and stuff during startup, the result would be
 106                 // !isValidBcp47() and the dictionary ignored.
 107                 if (sChunk == "hu-HU-u8")
 108                     sChunk = "hu-HU";
 109
 110                 LanguageTag aLangTag(sChunk, true);
 111                 if (!aLangTag.isValidBcp47())
 112                     continue;
 113
 114                 // Thus we first get the language of the dictionary
 115                 OUString aLocaleName(aLangTag.getBcp47());
 116
 117                 if (aDicLangInUse.insert(aLocaleName).second)
 118                 {
 119                     // add the dictionary to the resulting vector
 120                     SvtLinguConfigDictionaryEntry aDicEntry;
 121                     aDicEntry.aLocations.realloc(1);
 122                     aDicEntry.aLocaleNames.realloc(1);
 123                     aDicEntry.aLocations[0] = sPath;
 124                     aDicEntry.aFormatName = aFormatName;
 125                     aDicEntry.aLocaleNames[0] = aLocaleName;
 126                     aRes.push_back( aDicEntry );
 127                 }
 128             }
 129         }
 130     }
 131 }
 132 #endif
 133
 134 // build list of old style dictionaries (not as extensions) to use.
 135 // User installed dictionaries (the ones residing in the user paths)
 136 // will get precedence over system installed ones for the same language.
 137 std::vector< SvtLinguConfigDictionaryEntry > GetOldStyleDics( const char *pDicType )
 138 {
 139     std::vector< SvtLinguConfigDictionaryEntry > aRes;
 140
 141     if (!pDicType)
 142         return aRes;
 143
 144     OUString aFormatName;
 145     OUString aDicExtension;
 146 #ifdef SYSTEM_DICTS
 147     OUString aSystemDir;
 148     OUString aSystemPrefix;
 149     OUString aSystemSuffix;
 150 #endif
 151     if (strcmp( pDicType, "DICT" ) == 0)
 152     {
 153         aFormatName     = "DICT_SPELL";
 154         aDicExtension   = ".dic";
 155 #ifdef SYSTEM_DICTS
 156         aSystemDir      = DICT_SYSTEM_DIR;
 157         aSystemSuffix   = aDicExtension;
 158 #endif
 159     }
 160     else if (strcmp( pDicType, "HYPH" ) == 0)
 161     {
 162         aFormatName     = "DICT_HYPH";
 163         aDicExtension   = ".dic";
 164 #ifdef SYSTEM_DICTS
 165         aSystemDir      = HYPH_SYSTEM_DIR;
 166         aSystemPrefix   = "hyph_";
 167         aSystemSuffix   = aDicExtension;
 168 #endif
 169     }
 170     else if (strcmp( pDicType, "THES" ) == 0)
 171     {
 172         aFormatName     = "DICT_THES";
 173         aDicExtension   = ".dat";
 174 #ifdef SYSTEM_DICTS
 175         aSystemDir      = THES_SYSTEM_DIR;
 176         aSystemPrefix   = "th_";
 177         aSystemSuffix   = "_v2.dat";
 178 #endif
 179     }
 180
 181     if (aFormatName.isEmpty() || aDicExtension.isEmpty())
 182         return aRes;
 183
 184 #ifdef SYSTEM_DICTS
 185     // set of languages to remember the language where it is already
 186     // decided to make use of the dictionary.
 187     std::set< OUString > aDicLangInUse;
 188
 189     // follow the hunspell tool's example and check DICPATH for preferred dictionaries
 190     rtl_uString * pSearchPath = nullptr;
 191     osl_getEnvironment(OUString("DICPATH").pData, &pSearchPath);
 192
 193     if (pSearchPath)
 194     {
 195         OUString aSearchPath(pSearchPath);
 196         rtl_uString_release(pSearchPath);
 197
 198         sal_Int32 nIndex = 0;
 199         do
 200         {
 201             OUString aSystem = aSearchPath.getToken(0, ':', nIndex);
 202             OUString aCWD;
 203             OUString aRelative;
 204             OUString aAbsolute;
 205
 206             if (!utl::Bootstrap::getProcessWorkingDir(aCWD))
 207                 continue;
 208             if (osl::FileBase::getFileURLFromSystemPath(aSystem, aRelative)
 209                     != osl::FileBase::E_None)
 210                 continue;
 211             if (osl::FileBase::getAbsoluteFileURL(aCWD, aRelative, aAbsolute)
 212                     != osl::FileBase::E_None)
 213                 continue;
 214
 215             // GetOldStyleDicsInDir will make sure the dictionary is the right
 216             // type based on its prefix, that way hyphen, mythes and regular
 217             // dictionaries can live in one directory
 218             GetOldStyleDicsInDir(aAbsolute, aFormatName, aSystemSuffix,
 219                 aSystemPrefix, aDicLangInUse, aRes);
 220         }
 221         while (nIndex != -1);
 222     }
 223
 224     // load system directories last so that DICPATH prevails
 225     GetOldStyleDicsInDir(aSystemDir, aFormatName, aSystemSuffix, aSystemPrefix,
 226         aDicLangInUse, aRes);
 227 #endif
 228
 229     return aRes;
 230 }
 231
 232 void MergeNewStyleDicsAndOldStyleDics(
 233     std::vector< SvtLinguConfigDictionaryEntry > &rNewStyleDics,
 234     const std::vector< SvtLinguConfigDictionaryEntry > &rOldStyleDics )
 235 {
 236     // get list of languages supported by new style dictionaries
 237     std::set< OUString > aNewStyleLanguages;
 238     for (auto const& newStyleDic : rNewStyleDics)
 239     {
 240         const uno::Sequence< OUString > aLocaleNames(newStyleDic.aLocaleNames);
 241         sal_Int32 nLocaleNames = aLocaleNames.getLength();
 242         for (sal_Int32 k = 0;  k < nLocaleNames; ++k)
 243         {
 244             aNewStyleLanguages.insert( aLocaleNames[k] );
 245         }
 246     }
 247
 248     // now check all old style dictionaries if they will add a not yet
 249     // added language. If so add them to the resulting vector
 250     for (auto const& oldStyleDic : rOldStyleDics)
 251     {
 252         sal_Int32 nOldStyleDics = oldStyleDic.aLocaleNames.getLength();
 253
 254         // old style dics should only have one language listed...
 255         DBG_ASSERT( nOldStyleDics, "old style dictionary with more than one language found!");
 256         if (nOldStyleDics > 0)
 257         {
 258             if (linguistic::LinguIsUnspecified( oldStyleDic.aLocaleNames[0]))
 259             {
 260                 OSL_FAIL( "old style dictionary with invalid language found!" );
 261                 continue;
 262             }
 263
 264             // language not yet added?
 265             if (aNewStyleLanguages.find( oldStyleDic.aLocaleNames[0] ) == aNewStyleLanguages.end())
 266                 rNewStyleDics.push_back(oldStyleDic);
 267         }
 268         else
 269         {
 270             OSL_FAIL( "old style dictionary with no language found!" );
 271         }
 272     }
 273 }
 274
 275 rtl_TextEncoding getTextEncodingFromCharset(const sal_Char* pCharset)
 276 {
 277     // default result: used to indicate that we failed to get the proper encoding
 278     rtl_TextEncoding eRet = RTL_TEXTENCODING_DONTKNOW;
 279
 280     if (pCharset)
 281     {
 282         eRet = rtl_getTextEncodingFromMimeCharset(pCharset);
 283         if (eRet == RTL_TEXTENCODING_DONTKNOW)
 284             eRet = rtl_getTextEncodingFromUnixCharset(pCharset);
 285         if (eRet == RTL_TEXTENCODING_DONTKNOW)
 286         {
 287             if (strcmp("ISCII-DEVANAGARI", pCharset) == 0)
 288                 eRet = RTL_TEXTENCODING_ISCII_DEVANAGARI;
 289         }
 290     }
 291     return eRet;
 292 }
 293
 294 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */