src/Exporter.cpp

   1 /**
   2  * \file Exporter.cpp
   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 std::find;
  40 using std::string;
  41 using std::vector;
  42
  43
  44 namespace lyx {
  45
  46 using support::addName;
  47 using support::bformat;
  48 using support::changeExtension;
  49 using support::contains;
  50 using support::FileName;
  51 using support::makeAbsPath;
  52 using support::makeDisplayPath;
  53 using support::onlyFilename;
  54 using support::onlyPath;
  55 using support::package;
  56 using support::prefixIs;
  57
  58 namespace Alert = frontend::Alert;
  59 namespace fs = boost::filesystem;
  60
  61 namespace {
  62
  63 vector<string> const Backends(Buffer const & buffer)
  64 {
  65         vector<string> v;
  66         if (buffer.params().getTextClass().isTeXClassAvailable()) {
  67                 v.push_back(bufferFormat(buffer));
  68                 // FIXME: Don't hardcode format names here, but use a flag
  69                 if (v.back() == "latex")
  70                         v.push_back("pdflatex");
  71         }
  72         v.push_back("text");
  73         v.push_back("lyx");
  74         return v;
  75 }
  76
  77
  78 /// ask the user what to do if a file already exists
  79 int checkOverwrite(FileName const & filename)
  80 {
  81         if (fs::exists(filename.toFilesystemEncoding())) {
  82                 docstring text = bformat(_("The file %1$s already exists.\n\n"
  83                                                      "Do you want to overwrite that file?"),
  84                                       makeDisplayPath(filename.absFilename()));
  85                 return Alert::prompt(_("Overwrite file?"),
  86                                      text, 0, 2,
  87                                      _("&Overwrite"), _("Overwrite &all"),
  88                                      _("&Cancel export"));
  89         }
  90         return 0;
  91 }
  92
  93
  94 enum CopyStatus {
  95         SUCCESS,
  96         FORCE,
  97         CANCEL
  98 };
  99
 100
 101 /** copy file \p sourceFile to \p destFile. If \p force is false, the user
 102  *  will be asked before existing files are overwritten.
 103  *  \return
 104  *  - SUCCESS if this file got copied
 105  *  - FORCE   if subsequent calls should not ask for confirmation before
 106  *            overwriting files anymore.
 107  *  - CANCEL  if the export should be cancelled
 108  */
 109 CopyStatus copyFile(string const & format,
 110                     FileName const & sourceFile, FileName const & destFile,
 111                     string const & latexFile, bool force)
 112 {
 113         CopyStatus ret = force ? FORCE : SUCCESS;
 114
 115         // Only copy files that are in our tmp dir, all other files would
 116         // overwrite themselves. This check could be changed to
 117         // boost::filesystem::equivalent(sourceFile, destFile) if export to
 118         // other directories than the document directory is desired.
 119         if (!prefixIs(onlyPath(sourceFile.absFilename()), package().temp_dir().absFilename()))
 120                 return ret;
 121
 122         if (!force) {
 123                 switch(checkOverwrite(destFile)) {
 124                 case 0:
 125                         ret = SUCCESS;
 126                         break;
 127                 case 1:
 128                         ret = FORCE;
 129                         break;
 130                 default:
 131                         return CANCEL;
 132                 }
 133         }
 134
 135         Mover const & mover = getMover(format);
 136         if (!mover.copy(sourceFile, destFile, latexFile))
 137                 Alert::error(_("Couldn't copy file"),
 138                              bformat(_("Copying %1$s to %2$s failed."),
 139                                      makeDisplayPath(sourceFile.absFilename()),
 140                                      makeDisplayPath(destFile.absFilename())));
 141
 142         return ret;
 143 }
 144
 145 } //namespace anon
 146
 147
 148 bool Exporter::Export(Buffer * buffer, string const & format,
 149                       bool put_in_tempdir, string & result_file)
 150 {
 151         string backend_format;
 152         OutputParams runparams(&buffer->params().encoding());
 153         runparams.flavor = OutputParams::LATEX;
 154         runparams.linelen = lyxrc.plaintext_linelen;
 155         vector<string> backends = Backends(*buffer);
 156         if (find(backends.begin(), backends.end(), format) == backends.end()) {
 157                 // Get shortest path to format
 158                 Graph::EdgePath path;
 159                 for (vector<string>::const_iterator it = backends.begin();
 160                      it != backends.end(); ++it) {
 161                         Graph::EdgePath p = theConverters().getPath(*it, format);
 162                         if (!p.empty() && (path.empty() || p.size() < path.size())) {
 163                                 backend_format = *it;
 164                                 path = p;
 165                         }
 166                 }
 167                 if (!path.empty())
 168                         runparams.flavor = theConverters().getFlavor(path);
 169                 else {
 170                         Alert::error(_("Couldn't export file"),
 171                                 bformat(_("No information for exporting the format %1$s."),
 172                                    formats.prettyName(format)));
 173                         return false;
 174                 }
 175         } else {
 176                 backend_format = format;
 177                 // FIXME: Don't hardcode format names here, but use a flag
 178                 if (backend_format == "pdflatex")
 179                         runparams.flavor = OutputParams::PDFLATEX;
 180         }
 181
 182         string filename = buffer->getLatexName(false);
 183         filename = addName(buffer->temppath(), filename);
 184         filename = changeExtension(filename,
 185                                    formats.extension(backend_format));
 186
 187         // Plain text backend
 188         if (backend_format == "text")
 189                 writePlaintextFile(*buffer, FileName(filename), runparams);
 190         // no backend
 191         else if (backend_format == "lyx")
 192                 buffer->writeFile(FileName(filename));
 193         // Docbook backend
 194         else if (buffer->isDocBook()) {
 195                 runparams.nice = !put_in_tempdir;
 196                 buffer->makeDocBookFile(FileName(filename), runparams);
 197         }
 198         // LaTeX backend
 199         else if (backend_format == format) {
 200                 runparams.nice = true;
 201                 if (!buffer->makeLaTeXFile(FileName(filename), string(), runparams))
 202                         return false;
 203         } else if (!lyxrc.tex_allows_spaces
 204                    && contains(buffer->filePath(), ' ')) {
 205                 Alert::error(_("File name error"),
 206                            _("The directory path to the document cannot contain spaces."));
 207                 return false;
 208         } else {
 209                 runparams.nice = false;
 210                 if (!buffer->makeLaTeXFile(FileName(filename), buffer->filePath(), runparams))
 211                         return false;
 212         }
 213
 214         string const error_type = (format == "program")? "Build" : bufferFormat(*buffer);
 215         string const ext = formats.extension(format);
 216         FileName const tmp_result_file(changeExtension(filename, ext));
 217         bool const success = theConverters().convert(buffer, FileName(filename),
 218                 tmp_result_file, FileName(buffer->fileName()), backend_format, format,
 219                 buffer->errorList(error_type));
 220         // Emit the signal to show the error list.
 221         if (format != backend_format)
 222                 buffer->errors(error_type);
 223         if (!success)
 224                 return false;
 225
 226         if (put_in_tempdir)
 227                 result_file = tmp_result_file.absFilename();
 228         else {
 229                 result_file = changeExtension(buffer->fileName(), ext);
 230                 // We need to copy referenced files (e. g. included graphics
 231                 // if format == "dvi") to the result dir.
 232                 vector<ExportedFile> const files =
 233                         runparams.exportdata->externalFiles(format);
 234                 string const dest = onlyPath(result_file);
 235                 CopyStatus status = SUCCESS;
 236                 for (vector<ExportedFile>::const_iterator it = files.begin();
 237                                 it != files.end() && status != CANCEL; ++it) {
 238                         string const fmt =
 239                                 formats.getFormatFromFile(it->sourceName);
 240                         status = copyFile(fmt, it->sourceName,
 241                                           makeAbsPath(it->exportName, dest),
 242                                           it->exportName, status == FORCE);
 243                 }
 244                 if (status == CANCEL) {
 245                         buffer->message(_("Document export cancelled."));
 246                 } else if (fs::exists(tmp_result_file.toFilesystemEncoding())) {
 247                         // Finally copy the main file
 248                         status = copyFile(format, tmp_result_file,
 249                                           FileName(result_file), result_file,
 250                                           status == FORCE);
 251                         buffer->message(bformat(_("Document exported as %1$s "
 252                                                                "to file `%2$s'"),
 253                                                 formats.prettyName(format),
 254                                                 makeDisplayPath(result_file)));
 255                 } else {
 256                         // This must be a dummy converter like fax (bug 1888)
 257                         buffer->message(bformat(_("Document exported as %1$s"),
 258                                                 formats.prettyName(format)));
 259                 }
 260         }
 261
 262         return true;
 263 }
 264
 265
 266 bool Exporter::Export(Buffer * buffer, string const & format,
 267                       bool put_in_tempdir)
 268 {
 269         string result_file;
 270         return Export(buffer, format, put_in_tempdir, result_file);
 271 }
 272
 273
 274 bool Exporter::preview(Buffer * buffer, string const & format)
 275 {
 276         string result_file;
 277         if (!Export(buffer, format, true, result_file))
 278                 return false;
 279         return formats.view(*buffer, FileName(result_file), format);
 280 }
 281
 282
 283 bool Exporter::isExportable(Buffer const & buffer, string const & format)
 284 {
 285         vector<string> backends = Backends(buffer);
 286         for (vector<string>::const_iterator it = backends.begin();
 287              it != backends.end(); ++it)
 288                 if (theConverters().isReachable(*it, format))
 289                         return true;
 290         return false;
 291 }
 292
 293
 294 vector<Format const *> const
 295 Exporter::getExportableFormats(Buffer const & buffer, bool only_viewable)
 296 {
 297         vector<string> backends = Backends(buffer);
 298         vector<Format const *> result =
 299                 theConverters().getReachable(backends[0], only_viewable, true);
 300         for (vector<string>::const_iterator it = backends.begin() + 1;
 301              it != backends.end(); ++it) {
 302                 vector<Format const *>  r =
 303                         theConverters().getReachable(*it, only_viewable, false);
 304                 result.insert(result.end(), r.begin(), r.end());
 305         }
 306         return result;
 307 }
 308
 309
 310 ExportedFile::ExportedFile(FileName const & s, string const & e) :
 311         sourceName(s), exportName(e) {}
 312
 313
 314 bool operator==(ExportedFile const & f1, ExportedFile const & f2)
 315 {
 316         return f1.sourceName == f2.sourceName &&
 317                f1.exportName == f2.exportName;
 318
 319 }
 320
 321
 322 void ExportData::addExternalFile(string const & format,
 323                                  FileName const & sourceName,
 324                                  string const & exportName)
 325 {
 326         // Make sure that we have every file only once, otherwise copyFile()
 327         // would ask several times if it should overwrite a file.
 328         vector<ExportedFile> & files = externalfiles[format];
 329         ExportedFile file(sourceName, exportName);
 330         if (find(files.begin(), files.end(), file) == files.end())
 331                 files.push_back(file);
 332 }
 333
 334
 335 void ExportData::addExternalFile(string const & format,
 336                                  FileName const & sourceName)
 337 {
 338         addExternalFile(format, sourceName, onlyFilename(sourceName.absFilename()));
 339 }
 340
 341
 342 vector<ExportedFile> const
 343 ExportData::externalFiles(string const & format) const
 344 {
 345         FileMap::const_iterator cit = externalfiles.find(format);
 346         if (cit != externalfiles.end())
 347                 return cit->second;
 348         return vector<ExportedFile>();
 349 }
 350
 351
 352 } // namespace lyx