src/exporter.C

   1 /**
   2  * \file exporter.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author unknown
   7  * \author Alfredo Braunstein
   8  * \author Lars Gullik Bjønnes
   9  * \author Jean Marc Lasgouttes
  10  * \author Angus Leeming
  11  * \author John Levon
  12  * \author André Pönitz
  13  *
  14  * Full author contact details are available in file CREDITS.
  15  */
  16
  17 #include <config.h>
  18
  19 #include "exporter.h"
  20
  21 #include "buffer.h"
  22 #include "buffer_funcs.h"
  23 #include "bufferparams.h"
  24 #include "converter.h"
  25 #include "format.h"
  26 #include "gettext.h"
  27 #include "lyxrc.h"
  28 #include "mover.h"
  29 #include "output_plaintext.h"
  30 #include "outputparams.h"
  31 #include "frontends/Alert.h"
  32
  33 #include "support/filetools.h"
  34 #include "support/lyxlib.h"
  35 #include "support/package.h"
  36
  37 #include <boost/filesystem/operations.hpp>
  38
  39 using lyx::support::AddName;
  40 using lyx::support::bformat;
  41 using lyx::support::ChangeExtension;
  42 using lyx::support::contains;
  43 using lyx::support::MakeAbsPath;
  44 using lyx::support::MakeDisplayPath;
  45 using lyx::support::OnlyFilename;
  46 using lyx::support::OnlyPath;
  47 using lyx::support::package;
  48 using lyx::support::prefixIs;
  49
  50 using std::find;
  51 using std::string;
  52 using std::vector;
  53
  54 namespace fs = boost::filesystem;
  55
  56 namespace {
  57
  58 vector<string> const Backends(Buffer const & buffer)
  59 {
  60         vector<string> v;
  61         if (buffer.params().getLyXTextClass().isTeXClassAvailable())
  62                 v.push_back(BufferFormat(buffer));
  63         v.push_back("text");
  64         return v;
  65 }
  66
  67
  68 /// ask the user what to do if a file already exists
  69 int checkOverwrite(string const & filename)
  70 {
  71         if (fs::exists(filename)) {
  72                 string text = bformat(_("The file %1$s already exists.\n\n"
  73                                         "Do you want to over-write that file?"),
  74                                       MakeDisplayPath(filename));
  75                 return Alert::prompt(_("Over-write file?"),
  76                                      text, 0, 2,
  77                                      _("&Over-write"), _("Over-write &all"),
  78                                      _("&Cancel export"));
  79         }
  80         return 0;
  81 }
  82
  83
  84 enum CopyStatus {
  85         SUCCESS,
  86         FORCE,
  87         CANCEL
  88 };
  89
  90
  91 /** copy file \p sourceFile to \p destFile. If \p force is false, the user
  92  *  will be asked before existing files are overwritten.
  93  *  \return
  94  *  - SUCCESS if this file got copied
  95  *  - FORCE   if subsequent calls should not ask for confirmation before
  96  *            overwriting files anymore.
  97  *  - CANCEL  if the export should be cancelled
  98  */
  99 CopyStatus copyFile(string const & format,
 100                     string const & sourceFile, string const & destFile,
 101                     string const & latexFile, bool force)
 102 {
 103         CopyStatus ret = force ? FORCE : SUCCESS;
 104
 105         // Only copy files that are in our tmp dir, all other files would
 106         // overwrite themselves. This check could be changed to
 107         // boost::filesystem::equivalent(sourceFile, destFile) if export to
 108         // other directories than the document directory is desired.
 109         if (!prefixIs(OnlyPath(sourceFile), package().temp_dir()))
 110                 return ret;
 111
 112         if (!force) {
 113                 switch(checkOverwrite(destFile)) {
 114                 case 0:
 115                         ret = SUCCESS;
 116                         break;
 117                 case 1:
 118                         ret = FORCE;
 119                         break;
 120                 default:
 121                         return CANCEL;
 122                 }
 123         }
 124
 125         Mover const & mover = movers(format);
 126         if (!mover.copy(sourceFile, destFile, latexFile))
 127                 Alert::error(_("Couldn't copy file"),
 128                              bformat(_("Copying %1$s to %2$s failed."),
 129                                      MakeDisplayPath(sourceFile),
 130                                      MakeDisplayPath(destFile)));
 131
 132         return ret;
 133 }
 134
 135 } //namespace anon
 136
 137
 138 bool Exporter::Export(Buffer * buffer, string const & format,
 139                       bool put_in_tempdir, string & result_file)
 140 {
 141         string backend_format;
 142         OutputParams runparams;
 143         runparams.flavor = OutputParams::LATEX;
 144         runparams.linelen = lyxrc.ascii_linelen;
 145         vector<string> backends = Backends(*buffer);
 146         if (find(backends.begin(), backends.end(), format) == backends.end()) {
 147                 for (vector<string>::const_iterator it = backends.begin();
 148                      it != backends.end(); ++it) {
 149                         Graph::EdgePath p =
 150                                 converters.getPath(*it, format);
 151                         if (!p.empty()) {
 152                                 runparams.flavor = converters.getFlavor(p);
 153                                 backend_format = *it;
 154                                 break;
 155                         }
 156                 }
 157                 if (backend_format.empty()) {
 158                         Alert::error(_("Couldn't export file"),
 159                                 bformat(_("No information for exporting the format %1$s."),
 160                                    formats.prettyName(format)));
 161                         return false;
 162                 }
 163         } else
 164                 backend_format = format;
 165
 166         string filename = buffer->getLatexName(false);
 167         filename = AddName(buffer->temppath(), filename);
 168         filename = ChangeExtension(filename,
 169                                    formats.extension(backend_format));
 170
 171         // Ascii backend
 172         if (backend_format == "text")
 173                 writeFileAscii(*buffer, filename, runparams);
 174         // Linuxdoc backend
 175         else if (buffer->isLinuxDoc()) {
 176                 runparams.nice = !put_in_tempdir;
 177                 buffer->makeLinuxDocFile(filename, runparams);
 178         }
 179         // Docbook backend
 180         else if (buffer->isDocBook()) {
 181                 runparams.nice = !put_in_tempdir;
 182                 buffer->makeDocBookFile(filename, runparams);
 183         }
 184         // LaTeX backend
 185         else if (backend_format == format) {
 186                 runparams.nice = true;
 187                 buffer->makeLaTeXFile(filename, string(), runparams);
 188         } else if (!lyxrc.tex_allows_spaces
 189                    && contains(buffer->filePath(), ' ')) {
 190                 Alert::error(_("File name error"),
 191                            _("The directory path to the document cannot contain spaces."));
 192                 return false;
 193         } else {
 194                 runparams.nice = false;
 195                 buffer->makeLaTeXFile(filename, buffer->filePath(), runparams);
 196         }
 197
 198         if (!converters.convert(buffer, filename, filename,
 199                                 backend_format, format, result_file))
 200                 return false;
 201
 202         if (!put_in_tempdir) {
 203                 string const tmp_result_file = result_file;
 204                 result_file = ChangeExtension(buffer->fileName(),
 205                                               formats.extension(format));
 206                 // We need to copy referenced files (e. g. included graphics
 207                 // if format == "dvi") to the result dir.
 208                 vector<ExportedFile> const files =
 209                         runparams.exportdata->externalFiles(format);
 210                 string const dest = OnlyPath(result_file);
 211                 CopyStatus status = SUCCESS;
 212                 for (vector<ExportedFile>::const_iterator it = files.begin();
 213                                 it != files.end() && status != CANCEL; ++it) {
 214                         string const fmt =
 215                                 formats.getFormatFromFile(it->sourceName);
 216                         status = copyFile(fmt, it->sourceName,
 217                                           MakeAbsPath(it->exportName, dest),
 218                                           it->exportName, status == FORCE);
 219                 }
 220                 if (status == CANCEL) {
 221                         buffer->message(_("Document export cancelled."));
 222                 } else {
 223                         // Finally copy the main file
 224                         status = copyFile(format, tmp_result_file,
 225                                           result_file, result_file,
 226                                           status == FORCE);
 227                         buffer->message(bformat(_("Document exported as %1$s "
 228                                                   "to file `%2$s'"),
 229                                                 formats.prettyName(format),
 230                                                 MakeDisplayPath(result_file)));
 231                 }
 232         }
 233
 234         return true;
 235 }
 236
 237
 238 bool Exporter::Export(Buffer * buffer, string const & format,
 239                       bool put_in_tempdir)
 240 {
 241         string result_file;
 242         return Export(buffer, format, put_in_tempdir, result_file);
 243 }
 244
 245
 246 bool Exporter::Preview(Buffer * buffer, string const & format)
 247 {
 248         string result_file;
 249         if (!Export(buffer, format, true, result_file))
 250                 return false;
 251         return formats.view(*buffer, result_file, format);
 252 }
 253
 254
 255 bool Exporter::IsExportable(Buffer const & buffer, string const & format)
 256 {
 257         vector<string> backends = Backends(buffer);
 258         for (vector<string>::const_iterator it = backends.begin();
 259              it != backends.end(); ++it)
 260                 if (converters.isReachable(*it, format))
 261                         return true;
 262         return false;
 263 }
 264
 265
 266 vector<Format const *> const
 267 Exporter::GetExportableFormats(Buffer const & buffer, bool only_viewable)
 268 {
 269         vector<string> backends = Backends(buffer);
 270         vector<Format const *> result =
 271                 converters.getReachable(backends[0], only_viewable, true);
 272         for (vector<string>::const_iterator it = backends.begin() + 1;
 273              it != backends.end(); ++it) {
 274                 vector<Format const *>  r =
 275                         converters.getReachable(*it, only_viewable, false);
 276                 result.insert(result.end(), r.begin(), r.end());
 277         }
 278         return result;
 279 }
 280
 281
 282 ExportedFile::ExportedFile(string const & s, string const & e) :
 283         sourceName(s), exportName(e) {}
 284
 285
 286 bool operator==(ExportedFile const & f1, ExportedFile const & f2)
 287 {
 288         return f1.sourceName == f2.sourceName &&
 289                f1.exportName == f2.exportName;
 290
 291 }
 292
 293
 294 void ExportData::addExternalFile(string const & format,
 295                                  string const & sourceName,
 296                                  string const & exportName)
 297 {
 298         BOOST_ASSERT(lyx::support::AbsolutePath(sourceName));
 299
 300         // Make sure that we have every file only once, otherwise copyFile()
 301         // would ask several times if it should overwrite a file.
 302         vector<ExportedFile> & files = externalfiles[format];
 303         ExportedFile file(sourceName, exportName);
 304         if (find(files.begin(), files.end(), file) == files.end())
 305                 files.push_back(file);
 306 }
 307
 308
 309 void ExportData::addExternalFile(string const & format,
 310                                  string const & sourceName)
 311 {
 312         addExternalFile(format, sourceName, OnlyFilename(sourceName));
 313 }
 314
 315
 316 vector<ExportedFile> const
 317 ExportData::externalFiles(string const & format) const
 318 {
 319         FileMap::const_iterator cit = externalfiles.find(format);
 320         if (cit != externalfiles.end())
 321                 return cit->second;
 322         return vector<ExportedFile>();
 323 }