src/lyx_cb.C

   1 /**
   2  * \file lyx_cb.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Lars Gullik Bjønnes
   7  * \author Angus Leeming
   8  * \author John Levon
   9  * \author André Pönitz
  10  * \author Jürgen Vigna
  11  *
  12  * Full author contact details are available in file CREDITS.
  13  */
  14
  15 #include <config.h>
  16
  17 #include "lyx_cb.h"
  18
  19 #include "buffer.h"
  20 #include "bufferlist.h"
  21 #include "BufferView.h"
  22 #include "buffer_funcs.h"
  23 #include "cursor.h"
  24 #include "debug.h"
  25 #include "gettext.h"
  26 #include "session.h"
  27 #include "LaTeXFeatures.h"
  28 #include "lyx_main.h"
  29 #include "lyxlayout.h"
  30 #include "lyxrc.h"
  31 #include "lyxtext.h"
  32 #include "paragraph.h"
  33
  34 #include "frontends/Alert.h"
  35 #include "frontends/Application.h"
  36 #include "frontends/FileDialog.h"
  37 #include "frontends/lyx_gui.h"
  38
  39 #include "support/filefilterlist.h"
  40 #include "support/filetools.h"
  41 #include "support/fontutils.h"
  42 #include "support/forkedcall.h"
  43 #include "support/fs_extras.h"
  44 #include "support/lyxlib.h"
  45 #include "support/package.h"
  46 #include "support/path.h"
  47 #include "support/systemcall.h"
  48
  49 #if !defined (HAVE_FORK)
  50 # define fork() -1
  51 #endif
  52
  53 #include <boost/shared_ptr.hpp>
  54 #include <boost/filesystem/operations.hpp>
  55
  56 #include <cerrno>
  57 #include <fstream>
  58
  59 using lyx::docstring;
  60 using lyx::support::addName;
  61 using lyx::support::bformat;
  62 using lyx::support::destroyDir;
  63 using lyx::support::FileFilterList;
  64 using lyx::support::ForkedProcess;
  65 using lyx::support::isLyXFilename;
  66 using lyx::support::libFileSearch;
  67 using lyx::support::makeAbsPath;
  68 using lyx::support::makeDisplayPath;
  69 using lyx::support::onlyFilename;
  70 using lyx::support::onlyPath;
  71 using lyx::support::package;
  72 using lyx::support::removeAutosaveFile;
  73 using lyx::support::rename;
  74 using lyx::support::split;
  75 using lyx::support::Systemcall;
  76 using lyx::support::tempName;
  77 using lyx::support::unlink;
  78
  79 using boost::shared_ptr;
  80
  81 namespace Alert = lyx::frontend::Alert;
  82 namespace fs = boost::filesystem;
  83
  84 using std::back_inserter;
  85 using std::copy;
  86 using std::endl;
  87 using std::make_pair;
  88 using std::string;
  89 using std::ifstream;
  90 using std::ios;
  91 using std::istream_iterator;
  92
  93
  94 // this should be static, but I need it in buffer.C
  95 bool quitting;  // flag, that we are quitting the program
  96
  97
  98 //
  99 // Menu callbacks
 100 //
 101
 102 bool menuWrite(Buffer * buffer)
 103 {
 104         if (buffer->save()) {
 105                 LyX::ref().session().addLastFile(buffer->fileName());
 106                 return true;
 107         }
 108
 109         // FIXME: we don't tell the user *WHY* the save failed !!
 110
 111         docstring const file = makeDisplayPath(buffer->fileName(), 30);
 112
 113         docstring text = bformat(_("The document %1$s could not be saved.\n\n"
 114                                              "Do you want to rename the document and try again?"), file);
 115         int const ret = Alert::prompt(_("Rename and save?"),
 116                 text, 0, 1, _("&Rename"), _("&Cancel"));
 117
 118         if (ret == 0)
 119                 return writeAs(buffer);
 120         return false;
 121 }
 122
 123
 124
 125 bool writeAs(Buffer * buffer, string const & filename)
 126 {
 127         string fname = buffer->fileName();
 128         string const oldname = fname;
 129
 130         if (filename.empty()) {
 131
 132                 // FIXME UNICODE
 133                 FileDialog fileDlg(_("Choose a filename to save document as"),
 134                         LFUN_BUFFER_WRITE_AS,
 135                         make_pair(_("Documents|#o#O"), lyx::from_utf8(lyxrc.document_path)),
 136                         make_pair(_("Templates|#T#t"), lyx::from_utf8(lyxrc.template_path)));
 137
 138                 if (!isLyXFilename(fname))
 139                         fname += ".lyx";
 140
 141                 FileFilterList const filter (_("LyX Documents (*.lyx)"));
 142
 143                 FileDialog::Result result =
 144                         fileDlg.save(lyx::from_utf8(onlyPath(fname)),
 145                                      filter,
 146                                      lyx::from_utf8(onlyFilename(fname)));
 147
 148                 if (result.first == FileDialog::Later)
 149                         return false;
 150
 151                 fname = lyx::to_utf8(result.second);
 152
 153                 if (fname.empty())
 154                         return false;
 155
 156                 // Make sure the absolute filename ends with appropriate suffix
 157                 fname = makeAbsPath(fname);
 158                 if (!isLyXFilename(fname))
 159                         fname += ".lyx";
 160         } else
 161                 fname = filename;
 162
 163         if (fs::exists(fname)) {
 164                 docstring const file = makeDisplayPath(fname, 30);
 165                 docstring text = bformat(_("The document %1$s already exists.\n\n"
 166                                                      "Do you want to over-write that document?"), file);
 167                 int const ret = Alert::prompt(_("Over-write document?"),
 168                         text, 0, 1, _("&Over-write"), _("&Cancel"));
 169
 170                 if (ret == 1)
 171                         return false;
 172         }
 173
 174         // Ok, change the name of the buffer
 175         buffer->setFileName(fname);
 176         buffer->markDirty();
 177         bool unnamed = buffer->isUnnamed();
 178         buffer->setUnnamed(false);
 179
 180         if (!menuWrite(buffer)) {
 181                 buffer->setFileName(oldname);
 182                 buffer->setUnnamed(unnamed);
 183                 return false;
 184         }
 185
 186         removeAutosaveFile(oldname);
 187         return true;
 188 }
 189
 190
 191 void quitLyX(bool noask)
 192 {
 193         lyxerr[Debug::INFO] << "Running QuitLyX." << endl;
 194
 195         if (lyx_gui::use_gui) {
 196                 if (!noask && !theApp->bufferList().quitWriteAll())
 197                         return;
 198
 199                 LyX::cref().session().writeFile();
 200         }
 201
 202         // Set a flag that we do quitting from the program,
 203         // so no refreshes are necessary.
 204         quitting = true;
 205
 206         // close buffers first
 207         theApp->bufferList().closeAll();
 208
 209         // do any other cleanup procedures now
 210         lyxerr[Debug::INFO] << "Deleting tmp dir " << package().temp_dir() << endl;
 211
 212         if (!destroyDir(package().temp_dir())) {
 213                 docstring const msg =
 214                         bformat(_("Unable to remove the temporary directory %1$s"),
 215                         lyx::from_utf8(package().temp_dir()));
 216                 Alert::warning(_("Unable to remove temporary directory"), msg);
 217         }
 218
 219         theApp->exit(0);
 220         // Restore original font resources after Application is destroyed.
 221         lyx::support::restoreFontResources();
 222 }
 223
 224
 225 namespace {
 226
 227 class AutoSaveBuffer : public ForkedProcess {
 228 public:
 229         ///
 230         AutoSaveBuffer(BufferView & bv, string const & fname)
 231                 : bv_(bv), fname_(fname) {}
 232         ///
 233         virtual shared_ptr<ForkedProcess> clone() const
 234         {
 235                 return shared_ptr<ForkedProcess>(new AutoSaveBuffer(*this));
 236         }
 237         ///
 238         int start();
 239 private:
 240         ///
 241         virtual int generateChild();
 242         ///
 243         BufferView & bv_;
 244         string fname_;
 245 };
 246
 247
 248 int AutoSaveBuffer::start()
 249 {
 250         command_ = lyx::to_utf8(bformat(_("Auto-saving %1$s"), lyx::from_utf8(fname_)));
 251         return run(DontWait);
 252 }
 253
 254
 255 int AutoSaveBuffer::generateChild()
 256 {
 257         // tmp_ret will be located (usually) in /tmp
 258         // will that be a problem?
 259         pid_t const pid = fork(); // If you want to debug the autosave
 260         // you should set pid to -1, and comment out the
 261         // fork.
 262         if (pid == 0 || pid == -1) {
 263                 // pid = -1 signifies that lyx was unable
 264                 // to fork. But we will do the save
 265                 // anyway.
 266                 bool failed = false;
 267
 268                 string const tmp_ret = tempName(string(), "lyxauto");
 269                 if (!tmp_ret.empty()) {
 270                         bv_.buffer()->writeFile(tmp_ret);
 271                         // assume successful write of tmp_ret
 272                         if (!rename(tmp_ret, fname_)) {
 273                                 failed = true;
 274                                 // most likely couldn't move between filesystems
 275                                 // unless write of tmp_ret failed
 276                                 // so remove tmp file (if it exists)
 277                                 unlink(tmp_ret);
 278                         }
 279                 } else {
 280                         failed = true;
 281                 }
 282
 283                 if (failed) {
 284                         // failed to write/rename tmp_ret so try writing direct
 285                         if (!bv_.buffer()->writeFile(fname_)) {
 286                                 // It is dangerous to do this in the child,
 287                                 // but safe in the parent, so...
 288                                 if (pid == -1)
 289                                         // emit message signal.
 290                                         bv_.buffer()->message(_("Autosave failed!"));
 291                         }
 292                 }
 293                 if (pid == 0) { // we are the child so...
 294                         _exit(0);
 295                 }
 296         }
 297         return pid;
 298 }
 299
 300 } // namespace anon
 301
 302
 303 void autoSave(BufferView * bv)
 304         // should probably be moved into BufferList (Lgb)
 305         // Perfect target for a thread...
 306 {
 307         if (!bv->buffer())
 308                 return;
 309
 310         if (bv->buffer()->isBakClean() || bv->buffer()->isReadonly()) {
 311                 // We don't save now, but we'll try again later
 312                 bv->buffer()->resetAutosaveTimers();
 313                 return;
 314         }
 315
 316         // emit message signal.
 317         bv->buffer()->message(_("Autosaving current document..."));
 318
 319         // create autosave filename
 320         string fname = bv->buffer()->filePath();
 321         fname += '#';
 322         fname += onlyFilename(bv->buffer()->fileName());
 323         fname += '#';
 324
 325         AutoSaveBuffer autosave(*bv, fname);
 326         autosave.start();
 327
 328         bv->buffer()->markBakClean();
 329         bv->buffer()->resetAutosaveTimers();
 330 }
 331
 332
 333 //
 334 // Copyright CHT Software Service GmbH
 335 // Uwe C. Schroeder
 336 //
 337 // create new file with template
 338 // SERVERCMD !
 339 //
 340 void newFile(BufferView * bv, string const & filename)
 341 {
 342         // Split argument by :
 343         string name;
 344         string tmpname = split(filename, name, ':');
 345         lyxerr[Debug::INFO] << "Arg is " << filename
 346                             << "\nName is " << name
 347                             << "\nTemplate is " << tmpname << endl;
 348
 349         Buffer * const b = newFile(name, tmpname);
 350         if (b)
 351                 bv->setBuffer(b);
 352 }
 353
 354
 355 // Insert ascii file (if filename is empty, prompt for one)
 356 void insertAsciiFile(BufferView * bv, string const & f, bool asParagraph)
 357 {
 358         if (!bv->buffer())
 359                 return;
 360
 361         // FIXME: We don't know the encoding of the file
 362         docstring const tmpstr = lyx::from_utf8(getContentsOfAsciiFile(bv, f, asParagraph));
 363         if (tmpstr.empty())
 364                 return;
 365
 366         // clear the selection
 367         LyXText const & text = bv->buffer()->text();
 368         if (&text == bv->getLyXText())
 369                 bv->cursor().clearSelection();
 370         if (asParagraph)
 371                 bv->getLyXText()->insertStringAsParagraphs(bv->cursor(), tmpstr);
 372         else
 373                 bv->getLyXText()->insertStringAsLines(bv->cursor(), tmpstr);
 374         bv->update();
 375 }
 376
 377
 378 // Insert ascii file (if filename is empty, prompt for one)
 379 string getContentsOfAsciiFile(BufferView * bv, string const & f, bool asParagraph)
 380 {
 381         string fname = f;
 382
 383         if (fname.empty()) {
 384                 FileDialog fileDlg(_("Select file to insert"),
 385                         (asParagraph) ? LFUN_FILE_INSERT_ASCII_PARA : LFUN_FILE_INSERT_ASCII);
 386
 387                 FileDialog::Result result =
 388                         fileDlg.open(lyx::from_utf8(bv->buffer()->filePath()),
 389                                      FileFilterList(), docstring());
 390
 391                 if (result.first == FileDialog::Later)
 392                         return string();
 393
 394                 fname = lyx::to_utf8(result.second);
 395
 396                 if (fname.empty())
 397                         return string();
 398         }
 399
 400         if (!fs::is_readable(fname)) {
 401                 docstring const error = lyx::from_ascii(strerror(errno));
 402                 docstring const file = makeDisplayPath(fname, 50);
 403                 docstring const text = bformat(_("Could not read the specified document\n"
 404                                                            "%1$s\ndue to the error: %2$s"), file, error);
 405                 Alert::error(_("Could not read file"), text);
 406                 return string();
 407         }
 408
 409         ifstream ifs(fname.c_str());
 410         if (!ifs) {
 411                 docstring const error = lyx::from_ascii(strerror(errno));
 412                 docstring const file = makeDisplayPath(fname, 50);
 413                 docstring const text = bformat(_("Could not open the specified document\n"
 414                                                            "%1$s\ndue to the error: %2$s"), file, error);
 415                 Alert::error(_("Could not open file"), text);
 416                 return string();
 417         }
 418
 419         ifs.unsetf(ios::skipws);
 420         istream_iterator<char> ii(ifs);
 421         istream_iterator<char> end;
 422 #if !defined(USE_INCLUDED_STRING) && !defined(STD_STRING_IS_GOOD)
 423         // We use this until the compilers get better...
 424         std::vector<char> tmp;
 425         copy(ii, end, back_inserter(tmp));
 426         string const tmpstr(tmp.begin(), tmp.end());
 427 #else
 428         // This is what we want to use and what we will use once the
 429         // compilers get good enough.
 430         //string tmpstr(ii, end); // yet a reason for using std::string
 431         // alternate approach to get the file into a string:
 432         string tmpstr;
 433         copy(ii, end, back_inserter(tmpstr));
 434 #endif
 435
 436         return tmpstr;
 437 }
 438
 439
 440 // This function runs "configure" and then rereads lyx.defaults to
 441 // reconfigure the automatic settings.
 442 void reconfigure(BufferView * bv)
 443 {
 444         // emit message signal.
 445         bv->buffer()->message(_("Running configure..."));
 446
 447         // Run configure in user lyx directory
 448         lyx::support::Path p(package().user_support());
 449         string const configure_command = package().configure_command();
 450         Systemcall one;
 451         one.startscript(Systemcall::Wait, configure_command);
 452         p.pop();
 453         // emit message signal.
 454         bv->buffer()->message(_("Reloading configuration..."));
 455         lyxrc.read(libFileSearch(string(), "lyxrc.defaults"));
 456         // Re-read packages.lst
 457         LaTeXFeatures::getAvailable();
 458
 459         Alert::information(_("System reconfigured"),
 460                            _("The system has been reconfigured.\n"
 461                                           "You need to restart LyX to make use of any\n"
 462                                           "updated document class specifications."));
 463 }