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