src/bufferlist.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Word Processor
   5  *
   6  *          Copyright 1995 Matthias Ettrich
   7  *          Copyright 1995-1999 The LyX Team.
   8  *
   9  *           This file is Copyright 1996-1999
  10  *           Lars Gullik Bjønnes
  11  *
  12  * ======================================================
  13  */
  14
  15 #ifdef __GNUG__
  16 #pragma implementation
  17 #endif
  18
  19 #include <config.h>
  20
  21 #include <fstream>
  22 using std::ifstream;
  23 using std::ofstream;
  24 using std::ios;
  25
  26 #include <sys/types.h>
  27 #include <utime.h>
  28 #include "bufferlist.h"
  29 #include "lyx_main.h"
  30 #include "minibuffer.h"
  31 #include "support/FileInfo.h"
  32 #include "support/filetools.h"
  33 #include "lyx_gui_misc.h"
  34 #include "lastfiles.h"
  35 #include "debug.h"
  36 #include "lyxrc.h"
  37 #include "lyxscreen.h"
  38 #include "lyxtext.h"
  39 #include "lyx_cb.h"
  40 #include "gettext.h"
  41 #include "LyXView.h"
  42
  43 extern BufferView * current_view;
  44 extern int RunLinuxDoc(int, string const &);
  45
  46 //
  47 // Class BufferStorage
  48 //
  49
  50 void BufferStorage::release(Buffer * buf)
  51 {
  52         for(Container::iterator it = container.begin();
  53             it != container.end(); ++it) {
  54                 if ((*it) == buf) {
  55                         Buffer * tmpbuf = (*it);
  56                         container.erase(it);
  57                         delete tmpbuf;
  58                         break;
  59                 }
  60         }
  61 }
  62
  63
  64 Buffer * BufferStorage::newBuffer(string const & s,
  65                                   LyXRC * lyxrc,
  66                                   bool ronly)
  67 {
  68         Buffer * tmpbuf = new Buffer(s, lyxrc, ronly);
  69         tmpbuf->params.useClassDefaults();
  70         lyxerr.debug() << "Assigning to buffer "
  71                        << container.size() + 1 << endl;
  72         container.push_back(tmpbuf);
  73         return tmpbuf;
  74 }
  75
  76
  77 //
  78 // Class BufferList
  79 //
  80
  81 BufferList::BufferList()
  82 {
  83         _state = BufferList::OK;
  84 }
  85
  86
  87 bool BufferList::empty()
  88 {
  89         return bstore.empty();
  90 }
  91
  92
  93 extern void MenuWrite(Buffer *);
  94
  95 bool BufferList::QwriteAll()
  96 {
  97         bool askMoreConfirmation = false;
  98         string unsaved;
  99         for(BufferStorage::iterator it = bstore.begin();
 100             it != bstore.end(); ++it) {
 101                 if (!(*it)->isLyxClean()) {
 102                         switch(AskConfirmation(_("Changes in document:"),
 103                                                MakeDisplayPath((*it)->fileName(),
 104                                                                50),
 105                                                _("Save document?"))) {
 106                         case 1: // Yes
 107                                 MenuWrite((*it));
 108                                 break;
 109                         case 2: // No
 110                                 askMoreConfirmation = true;
 111                                 unsaved += MakeDisplayPath((*it)->fileName(),
 112                                                            50);
 113                                 unsaved += "\n";
 114                                 break;
 115                         case 3: // Cancel
 116                                 return false;
 117                         }
 118                 }
 119         }
 120         if (askMoreConfirmation &&
 121             lyxrc->exit_confirmation &&
 122             !AskQuestion(_("Some documents were not saved:"),
 123                          unsaved, _("Exit anyway?"))) {
 124                 return false;
 125         }
 126
 127         return true;
 128 }
 129
 130
 131 // Should probably be moved to somewhere else: BufferView? LyXView?
 132 bool BufferList::write(Buffer * buf, bool makeBackup)
 133 {
 134         current_view->owner()->getMiniBuffer()->Set(_("Saving document"),
 135                         MakeDisplayPath(buf->fileName()), "...");
 136
 137         // We don't need autosaves in the immediate future. (Asger)
 138         buf->resetAutosaveTimers();
 139
 140         // make a backup
 141         if (makeBackup) {
 142                 string s = buf->fileName() + '~';
 143                 // Rename is the wrong way of making a backup,
 144                 // this is the correct way.
 145                 /* truss cp fil fil2:
 146                    lstat("LyXVC3.lyx", 0xEFFFF898)                 Err#2 ENOENT
 147                    stat("LyXVC.lyx", 0xEFFFF688)                   = 0
 148                    open("LyXVC.lyx", O_RDONLY)                     = 3
 149                    open("LyXVC3.lyx", O_WRONLY|O_CREAT|O_TRUNC, 0600) = 4
 150                    fstat(4, 0xEFFFF508)                            = 0
 151                    fstat(3, 0xEFFFF508)                            = 0
 152                    read(3, " # T h i s   f i l e   w".., 8192)     = 5579
 153                    write(4, " # T h i s   f i l e   w".., 5579)    = 5579
 154                    read(3, 0xEFFFD4A0, 8192)                       = 0
 155                    close(4)                                        = 0
 156                    close(3)                                        = 0
 157                    chmod("LyXVC3.lyx", 0100644)                    = 0
 158                    lseek(0, 0, SEEK_CUR)                           = 46440
 159                    _exit(0)
 160                 */
 161
 162                 // Should proabaly have some more error checking here.
 163                 // Should be cleaned up in 0.13, at least a bit.
 164                 // Doing it this way, also makes the inodes stay the same.
 165                 // This is still not a very good solution, in particular we
 166                 // might loose the owner of the backup.
 167                 FileInfo finfo(buf->fileName());
 168                 if (finfo.exist()) {
 169                         mode_t fmode = finfo.getMode();
 170                         struct utimbuf * times = new struct utimbuf;
 171
 172                         times->actime = finfo.getAccessTime();
 173                         times->modtime = finfo.getModificationTime();
 174                         long blksize = finfo.getBlockSize();
 175                         lyxerr.debug() << "BlockSize: " << blksize << endl;
 176                         ifstream ifs(buf->fileName().c_str());
 177                         ofstream ofs(s.c_str(), ios::out|ios::trunc);
 178                         if (ifs && ofs) {
 179                                 char c = 0;
 180                                 while (ifs.get(c)) {
 181                                         ofs.put(c);
 182                                 };
 183                                 ifs.close();
 184                                 ofs.close();
 185                                 chmod(s.c_str(), fmode);
 186
 187                                 if (utime(s.c_str(), times)) {
 188                                         lyxerr << "utime error." << endl;
 189                                 }
 190                         } else {
 191                                 lyxerr << "LyX was not able to make "
 192                                         "backupcopy. Beware." << endl;
 193                         }
 194                         delete[] times;
 195                 }
 196         }
 197
 198         if (buf->writeFile(buf->fileName(), false)) {
 199                 buf->markLyxClean();
 200
 201                 current_view->owner()->getMiniBuffer()->
 202                         Set(_("Document saved as"),
 203                         MakeDisplayPath(buf->fileName()));
 204
 205                 // now delete the autosavefile
 206                 string a = OnlyPath(buf->fileName());
 207                 a += '#';
 208                 a += OnlyFilename(buf->fileName());
 209                 a += '#';
 210                 FileInfo fileinfo(a);
 211                 if (fileinfo.exist()) {
 212                         if (remove(a.c_str()) != 0) {
 213                                 WriteFSAlert(_("Could not delete "
 214                                                "auto-save file!"), a);
 215                         }
 216                 }
 217         } else {
 218                 // Saving failed, so backup is not backup
 219                 if (makeBackup) {
 220                         string s = buf->fileName() + '~';
 221                         rename(s.c_str(), buf->fileName().c_str());
 222                 }
 223                 current_view->owner()->getMiniBuffer()->Set(_("Save failed!"));
 224                 return false;
 225         }
 226
 227         return true;
 228 }
 229
 230
 231 void BufferList::closeAll()
 232 {
 233         _state = BufferList::CLOSING;
 234         while (!bstore.empty()) {
 235                 close(bstore.front());
 236         }
 237         _state = BufferList::OK;
 238 }
 239
 240
 241 void BufferList::resize()
 242 {
 243         for(BufferStorage::iterator it = bstore.begin();
 244             it != bstore.end(); ++it) {
 245                 (*it)->resize();
 246         }
 247 }
 248
 249
 250 bool BufferList::close(Buffer * buf)
 251 {
 252         if (buf->getUser()) buf->getUser()->insetUnlock();
 253
 254         if (buf->paragraph && !buf->isLyxClean() && !quitting) {
 255                 ProhibitInput();
 256                 switch(AskConfirmation(_("Changes in document:"),
 257                                        MakeDisplayPath(buf->fileName(), 50),
 258                                        _("Save document?"))){
 259                 case 1: // Yes
 260                         if (write(buf)) {
 261                                 lastfiles->newFile(buf->fileName());
 262                         } else {
 263                                 AllowInput();
 264                                 return false;
 265                         }
 266                         break;
 267                 case 3: // Cancel
 268                         AllowInput();
 269                         return false;
 270                 }
 271                 AllowInput();
 272         }
 273
 274         bstore.release(buf);
 275         return true;
 276 }
 277
 278
 279 void BufferList::makePup(int pup)
 280         /* This should be changed to return a char const *const
 281            in the same way as for lastfiles.[hC]
 282            */
 283 {
 284         int ant = 0;
 285         for(BufferStorage::iterator it = bstore.begin();
 286             it != bstore.end(); ++it) {
 287                 string relbuf = MakeDisplayPath((*it)->fileName(), 30);
 288                 fl_addtopup(pup, relbuf.c_str());
 289                 ++ant;
 290         }
 291         if (ant == 0) fl_addtopup(pup, _("No Documents Open!%t"));
 292 }
 293
 294
 295 Buffer * BufferList::first()
 296 {
 297         if (bstore.empty()) return 0;
 298         return bstore.front();
 299 }
 300
 301
 302 Buffer * BufferList::getBuffer(int choice)
 303 {
 304         if (choice >= bstore.size()) return 0;
 305         return bstore[choice];
 306 }
 307
 308
 309 void BufferList::updateInset(Inset * inset, bool mark_dirty)
 310 {
 311         for (BufferStorage::iterator it = bstore.begin();
 312              it != bstore.end(); ++it) {
 313                 if ((*it)->getUser()
 314                     && (*it)->getUser()->text->UpdateInset(inset)) {
 315                         if (mark_dirty)
 316                                 (*it)->markDirty();
 317                         break;
 318                 }
 319         }
 320 }
 321
 322
 323 int BufferList::unlockInset(UpdatableInset * inset)
 324 {
 325         if (!inset) return 1;
 326         for(BufferStorage::iterator it = bstore.begin();
 327             it != bstore.end(); ++it) {
 328                 if ((*it)->getUser()
 329                     && (*it)->getUser()->the_locking_inset == inset) {
 330                         (*it)->getUser()->insetUnlock();
 331                         return 0;
 332                 }
 333         }
 334         return 1;
 335 }
 336
 337
 338 void BufferList::updateIncludedTeXfiles(string const & mastertmpdir)
 339 {
 340         for(BufferStorage::iterator it = bstore.begin();
 341             it != bstore.end(); ++it) {
 342                 if (!(*it)->isDepClean(mastertmpdir)) {
 343                         string writefile = mastertmpdir;
 344                         writefile += '/';
 345                         writefile += ChangeExtension((*it)->fileName(),
 346                                                      ".tex", true);
 347                         (*it)->makeLaTeXFile(writefile, mastertmpdir,
 348                                              false, true);
 349                         (*it)->markDepClean(mastertmpdir);
 350                 }
 351         }
 352 }
 353
 354
 355 void BufferList::emergencyWriteAll()
 356 {
 357         for (BufferStorage::iterator it = bstore.begin();
 358              it != bstore.end(); ++it) {
 359                 if (!(*it)->isLyxClean()) {
 360                         bool madeit = false;
 361
 362                         lyxerr <<_("lyx: Attempting to save"
 363                                    " document ")
 364                                << (*it)->fileName()
 365                                << _(" as...") << endl;
 366
 367                         for (int i = 0; i < 3 && !madeit; ++i) {
 368                                 string s;
 369
 370                                 // We try to save three places:
 371                                 // 1) Same place as document.
 372                                 // 2) In HOME directory.
 373                                 // 3) In "/tmp" directory.
 374                                 if (i == 0) {
 375                                         s = (*it)->fileName();
 376                                 } else if (i == 1) {
 377                                         s = AddName(GetEnvPath("HOME"),
 378                                                     (*it)->fileName());
 379                                 } else {
 380                                         // MakeAbsPath to prepend the current
 381                                         // drive letter on OS/2
 382                                         s = AddName(MakeAbsPath("/tmp/"),
 383                                                     (*it)->fileName());
 384                                 }
 385                                 s += ".emergency";
 386
 387                                 lyxerr << "  " << i + 1 << ") " << s << endl;
 388
 389                                 if ((*it)->writeFile(s, true)) {
 390                                         (*it)->markLyxClean();
 391                                         lyxerr << _("  Save seems successful. "
 392                                                     "Phew.") << endl;
 393                                         madeit = true;
 394                                 } else if (i != 2) {
 395                                         lyxerr << _("  Save failed! Trying...")
 396                                                << endl;
 397                                 } else {
 398                                         lyxerr << _("  Save failed! Bummer. "
 399                                                     "Document is lost.")
 400                                                << endl;
 401                                 }
 402                         }
 403                 }
 404         }
 405 }
 406
 407
 408 Buffer * BufferList::readFile(string const & s, bool ronly)
 409 {
 410         Buffer * b = bstore.newBuffer(s, lyxrc, ronly);
 411
 412         string ts = s;
 413         string e = OnlyPath(s);
 414         string a = e;
 415         // File information about normal file
 416         FileInfo fileInfo2(s);
 417
 418         // Check if emergency save file exists and is newer.
 419         e += OnlyFilename(s) + ".emergency";
 420         FileInfo fileInfoE(e);
 421
 422         bool use_emergency = false;
 423
 424         if (fileInfoE.exist() && fileInfo2.exist()) {
 425                 if (fileInfoE.getModificationTime()
 426                     > fileInfo2.getModificationTime()) {
 427                         if (AskQuestion(_("An emergency save of this document exists!"),
 428                                         MakeDisplayPath(s, 50),
 429                                         _("Try to load that instead?"))) {
 430                                 ts = e;
 431                                 // the file is not saved if we load the
 432                                 // emergency file.
 433                                 b->markDirty();
 434                                 use_emergency = true;
 435                         } else {
 436                                 // Here, we should delete the emergency save
 437                                 unlink(e.c_str());
 438                         }
 439                 }
 440         }
 441
 442         if (!use_emergency) {
 443                 // Now check if autosave file is newer.
 444                 a += '#';
 445                 a += OnlyFilename(s);
 446                 a += '#';
 447                 FileInfo fileInfoA(a);
 448                 if (fileInfoA.exist() && fileInfo2.exist()) {
 449                         if (fileInfoA.getModificationTime()
 450                             > fileInfo2.getModificationTime()) {
 451                                 if (AskQuestion(_("Autosave file is newer."),
 452                                                 MakeDisplayPath(s, 50),
 453                                                 _("Load that one instead?"))) {
 454                                         ts = a;
 455                                         // the file is not saved if we load the
 456                                         // autosave file.
 457                                         b->markDirty();
 458                                 } else {
 459                                         // Here, we should delete the autosave
 460                                         unlink(a.c_str());
 461                                 }
 462                         }
 463                 }
 464         }
 465         // not sure if this is the correct place to begin LyXLex
 466         LyXLex lex(0, 0);
 467         lex.setFile(ts);
 468         if (b->readFile(lex))
 469                 return b;
 470         else {
 471                 bstore.release(b);
 472                 return 0;
 473         }
 474 }
 475
 476
 477 bool BufferList::exists(string const & s)
 478 {
 479         for (BufferStorage::iterator it = bstore.begin();
 480              it != bstore.end(); ++it) {
 481                 if ((*it)->fileName() == s)
 482                         return true;
 483         }
 484         return false;
 485 }
 486
 487
 488 Buffer * BufferList::getBuffer(string const & s)
 489 {
 490         for(BufferStorage::iterator it = bstore.begin();
 491             it != bstore.end(); ++it) {
 492                 if ((*it)->fileName() == s)
 493                         return (*it);
 494         }
 495         return 0;
 496 }
 497
 498
 499 Buffer * BufferList::newFile(string const & name, string tname)
 500 {
 501         /* get a free buffer */
 502         Buffer * b = bstore.newBuffer(name, lyxrc);
 503
 504         // use defaults.lyx as a default template if it exists.
 505         if (tname.empty()) {
 506                 tname = LibFileSearch("templates", "defaults.lyx");
 507         }
 508         if (!tname.empty() && IsLyXFilename(tname)){
 509                 bool templateok = false;
 510                 LyXLex lex(0, 0);
 511                 lex.setFile(tname);
 512                 if (lex.IsOK()) {
 513                         if (b->readFile(lex)) {
 514                                 templateok = true;
 515                         }
 516                 }
 517                 if (!templateok) {
 518                         WriteAlert(_("Error!"), _("Unable to open template"),
 519                                    MakeDisplayPath(tname));
 520                         // no template, start with empty buffer
 521                         b->paragraph = new LyXParagraph;
 522                 }
 523         }
 524         else {  // start with empty buffer
 525                 b->paragraph = new LyXParagraph;
 526         }
 527
 528         b->markDirty();
 529         b->setReadonly(false);
 530
 531         return b;
 532 }
 533
 534
 535 Buffer * BufferList::loadLyXFile(string const & filename, bool tolastfiles)
 536 {
 537         // make sure our path is absolute
 538         string s = MakeAbsPath(filename);
 539
 540         // Is this done too early?
 541         // Is it LinuxDoc?
 542         if (IsSGMLFilename(s)) {
 543                 FileInfo fi(s);
 544                 if (fi.exist() && fi.readable()) {
 545                         if (!RunLinuxDoc(-1, s)) {
 546                                 s = ChangeExtension (s, ".lyx", false);
 547                         } else { // sgml2lyx failed
 548                                 WriteAlert(_("Error!"),
 549                                            _("Could not convert file"), s);
 550                                 return 0;
 551                         }
 552                 } else {
 553                         // just change the extension and it will be
 554                         // handled like a regular lyx file that does
 555                         // not exist.
 556                         s = ChangeExtension(s, ".lyx", false);
 557                 }
 558         }
 559
 560         // file already open?
 561         if (exists(s)) {
 562                 if (AskQuestion(_("Document is already open:"),
 563                                 MakeDisplayPath(s, 50),
 564                                 _("Do you want to reload that document?"))) {
 565                         // Reload is accomplished by closing and then loading
 566                         if (!close(getBuffer(s))) {
 567                                 return 0;
 568                         }
 569                         // Fall through to new load. (Asger)
 570                 } else {
 571                         // Here, we pretend that we just loaded the
 572                         // open document
 573                         return getBuffer(s);
 574                 }
 575         }
 576         Buffer * b = 0;
 577         bool ro = false;
 578         switch (IsFileWriteable(s)) {
 579         case 0:
 580                 current_view->owner()->getMiniBuffer()->
 581                         Set(_("File `")+MakeDisplayPath(s, 50)+
 582                         _("' is read-only."));
 583                 ro = true;
 584                 // Fall through
 585         case 1:
 586                 b = readFile(s, ro);
 587                 if (b) {
 588                         b->lyxvc.file_found_hook(s);
 589                 }
 590                 break; //fine- it's r/w
 591         case -1:
 592                 // Here we probably should run
 593                 if (LyXVC::file_not_found_hook(s)) {
 594                         // Ask if the file should be checked out for
 595                         // viewing/editing, if so: load it.
 596                         lyxerr << "Do you want to checkout?" << endl;
 597                 }
 598                 if (AskQuestion(_("Cannot open specified file:"),
 599                                 MakeDisplayPath(s, 50),
 600                                 _("Create new document with this name?")))
 601                         {
 602                                 // Find a free buffer
 603                                 b = newFile(s, string());
 604                         }
 605                 break;
 606         }
 607
 608         if (b && tolastfiles)
 609                 lastfiles->newFile(b->fileName());
 610
 611         return b;
 612 }