src/buffer_funcs.C

   1 /**
   2  * \file buffer_funcs.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 Alfredo Braunstein
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  *
  11  */
  12
  13 #include <config.h>
  14
  15 #include "buffer_funcs.h"
  16 #include "buffer.h"
  17 #include "bufferlist.h"
  18 #include "bufferparams.h"
  19 #include "dociterator.h"
  20 #include "counters.h"
  21 #include "errorlist.h"
  22 #include "Floating.h"
  23 #include "FloatList.h"
  24 #include "gettext.h"
  25 #include "language.h"
  26 #include "LaTeX.h"
  27 #include "lyxtextclass.h"
  28 #include "paragraph.h"
  29 #include "paragraph_funcs.h"
  30 #include "ParagraphList.h"
  31 #include "ParagraphParameters.h"
  32 #include "pariterator.h"
  33 #include "lyxvc.h"
  34 #include "texrow.h"
  35 #include "vc-backend.h"
  36
  37 #include "frontends/Alert.h"
  38
  39 #include "insets/insetbibitem.h"
  40
  41 #include "support/filetools.h"
  42 #include "support/fs_extras.h"
  43 #include "support/lyxlib.h"
  44
  45 #include <boost/bind.hpp>
  46 #include <boost/filesystem/operations.hpp>
  47
  48 using lyx::pit_type;
  49 using lyx::support::bformat;
  50 using lyx::support::LibFileSearch;
  51 using lyx::support::MakeDisplayPath;
  52 using lyx::support::OnlyFilename;
  53 using lyx::support::OnlyPath;
  54 using lyx::support::unlink;
  55
  56 using std::min;
  57 using std::string;
  58
  59 namespace fs = boost::filesystem;
  60
  61 extern BufferList bufferlist;
  62
  63 namespace {
  64
  65 bool readFile(Buffer * const b, string const & s)
  66 {
  67         BOOST_ASSERT(b);
  68
  69         // File information about normal file
  70         if (!fs::exists(s)) {
  71                 string const file = MakeDisplayPath(s, 50);
  72                 string text = bformat(_("The specified document\n%1$s"
  73                                         "\ncould not be read."), file);
  74                 Alert::error(_("Could not read document"), text);
  75                 return false;
  76         }
  77
  78         // Check if emergency save file exists and is newer.
  79         string const e = OnlyPath(s) + OnlyFilename(s) + ".emergency";
  80
  81         if (fs::exists(e) && fs::exists(s)
  82             && fs::last_write_time(e) > fs::last_write_time(s))
  83         {
  84                 string const file = MakeDisplayPath(s, 20);
  85                 string const text =
  86                         bformat(_("An emergency save of the document "
  87                                   "%1$s exists.\n\n"
  88                                   "Recover emergency save?"), file);
  89                 switch (Alert::prompt(_("Load emergency save?"), text, 0, 2,
  90                                       _("&Recover"),  _("&Load Original"),
  91                                       _("&Cancel")))
  92                 {
  93                 case 0:
  94                         // the file is not saved if we load the emergency file.
  95                         b->markDirty();
  96                         return b->readFile(e);
  97                 case 1:
  98                         break;
  99                 default:
 100                         return false;
 101                 }
 102         }
 103
 104         // Now check if autosave file is newer.
 105         string const a = OnlyPath(s) + '#' + OnlyFilename(s) + '#';
 106
 107         if (fs::exists(a) && fs::exists(s)
 108             && fs::last_write_time(a) > fs::last_write_time(s))
 109         {
 110                 string const file = MakeDisplayPath(s, 20);
 111                 string const text =
 112                         bformat(_("The backup of the document "
 113                                   "%1$s is newer.\n\nLoad the "
 114                                   "backup instead?"), file);
 115                 switch (Alert::prompt(_("Load backup?"), text, 0, 2,
 116                                       _("&Load backup"), _("Load &original"),
 117                                       _("&Cancel") ))
 118                 {
 119                 case 0:
 120                         // the file is not saved if we load the autosave file.
 121                         b->markDirty();
 122                         return b->readFile(a);
 123                 case 1:
 124                         // Here we delete the autosave
 125                         unlink(a);
 126                         break;
 127                 default:
 128                         return false;
 129                 }
 130         }
 131         return b->readFile(s);
 132 }
 133
 134
 135 } // namespace anon
 136
 137
 138
 139 bool loadLyXFile(Buffer * b, string const & s)
 140 {
 141         BOOST_ASSERT(b);
 142
 143         if (fs::is_readable(s)) {
 144                 if (readFile(b, s)) {
 145                         b->lyxvc().file_found_hook(s);
 146                         if (!fs::is_writable(s))
 147                                 b->setReadonly(true);
 148                         return true;
 149                 }
 150         } else {
 151                 string const file = MakeDisplayPath(s, 20);
 152                 // Here we probably should run
 153                 if (LyXVC::file_not_found_hook(s)) {
 154                         string const text =
 155                                 bformat(_("Do you want to retrieve the document"
 156                                           " %1$s from version control?"), file);
 157                         int const ret = Alert::prompt(_("Retrieve from version control?"),
 158                                 text, 0, 1, _("&Retrieve"), _("&Cancel"));
 159
 160                         if (ret == 0) {
 161                                 // How can we know _how_ to do the checkout?
 162                                 // With the current VC support it has to be,
 163                                 // a RCS file since CVS do not have special ,v files.
 164                                 RCS::retrieve(s);
 165                                 return loadLyXFile(b, s);
 166                         }
 167                 }
 168         }
 169         return false;
 170 }
 171
 172
 173 Buffer * newFile(string const & filename, string const & templatename,
 174                  bool const isNamed)
 175 {
 176         // get a free buffer
 177         Buffer * b = bufferlist.newBuffer(filename);
 178         BOOST_ASSERT(b);
 179
 180         string tname;
 181         // use defaults.lyx as a default template if it exists.
 182         if (templatename.empty())
 183                 tname = LibFileSearch("templates", "defaults.lyx");
 184         else
 185                 tname = templatename;
 186
 187         if (!tname.empty()) {
 188                 if (!b->readFile(tname)) {
 189                         string const file = MakeDisplayPath(tname, 50);
 190                         string const text  = bformat(_("The specified document template\n%1$s\ncould not be read."), file);
 191                         Alert::error(_("Could not read template"), text);
 192                         // no template, start with empty buffer
 193                 }
 194         }
 195
 196         if (!isNamed) {
 197                 b->setUnnamed();
 198                 b->setFileName(filename);
 199         }
 200
 201         b->setReadonly(false);
 202         b->fully_loaded(true);
 203         b->updateDocLang(b->params().language);
 204
 205         return b;
 206 }
 207
 208
 209 void bufferErrors(Buffer const & buf, TeXErrors const & terr)
 210 {
 211         TeXErrors::Errors::const_iterator cit = terr.begin();
 212         TeXErrors::Errors::const_iterator end = terr.end();
 213
 214         for (; cit != end; ++cit) {
 215                 int id_start = -1;
 216                 int pos_start = -1;
 217                 int errorrow = cit->error_in_line;
 218                 bool found = buf.texrow().getIdFromRow(errorrow, id_start,
 219                                                        pos_start);
 220                 int id_end = -1;
 221                 int pos_end = -1;
 222                 do {
 223                         ++errorrow;
 224                         found = buf.texrow().getIdFromRow(errorrow, id_end,
 225                                                           pos_end);
 226                 } while (found && id_start == id_end && pos_start == pos_end);
 227
 228                 buf.error(ErrorItem(cit->error_desc, cit->error_text,
 229                                     id_start, pos_start, pos_end));
 230         }
 231 }
 232
 233
 234 void bufferErrors(Buffer const & buf, ErrorList const & el)
 235 {
 236         for_each(el.begin(), el.end(), bind(ref(buf.error), _1));
 237 }
 238
 239
 240 string const BufferFormat(Buffer const & buffer)
 241 {
 242         if (buffer.isLinuxDoc())
 243                 return "linuxdoc";
 244         else if (buffer.isDocBook())
 245                 return "docbook";
 246         else if (buffer.isLiterate())
 247                 return "literate";
 248         else
 249                 return "latex";
 250 }
 251
 252
 253 int countWords(DocIterator const & from, DocIterator const & to)
 254 {
 255         int count = 0;
 256         bool inword = false;
 257         for (DocIterator dit = from ; dit != to ; dit.forwardPos()) {
 258                 // Copied and adapted from isLetter() in ControlSpellChecker
 259                 if (dit.inTexted()
 260                     && dit.pos() != dit.lastpos()
 261                     && dit.paragraph().isLetter(dit.pos())
 262                     && !isDeletedText(dit.paragraph(), dit.pos())) {
 263                         if (!inword) {
 264                                 ++count;
 265                                 inword = true;
 266                         }
 267                 } else if (inword)
 268                         inword = false;
 269         }
 270
 271         return count;
 272 }
 273
 274
 275 namespace {
 276
 277 lyx::depth_type getDepth(DocIterator const & it)
 278 {
 279         lyx::depth_type depth = 0;
 280         for (size_t i = 0 ; i < it.depth() ; ++i)
 281                 if (!it[i].inset().inMathed())
 282                         depth += it[i].paragraph().getDepth() + 1;
 283         // remove 1 since the outer inset does not count
 284         return depth - 1;
 285 }
 286
 287 lyx::depth_type getItemDepth(ParIterator const & it)
 288 {
 289         Paragraph const & par = *it;
 290         LYX_LABEL_TYPES const labeltype = par.layout()->labeltype;
 291
 292         if (labeltype != LABEL_ENUMERATE && labeltype != LABEL_ITEMIZE)
 293                 return 0;
 294
 295         // this will hold the lowest depth encountered up to now.
 296         lyx::depth_type min_depth = getDepth(it);
 297         ParIterator prev_it = it;
 298         while (true) {
 299                 if (prev_it.pit())
 300                         --prev_it.top().pit();
 301                 else {
 302                         // start of nested inset: go to outer par
 303                         prev_it.pop_back();
 304                         if (prev_it.empty()) {
 305                                 // start of document: nothing to do
 306                                 return 0;
 307                         }
 308                 }
 309
 310                 // We search for the first paragraph with same label
 311                 // that is not more deeply nested.
 312                 Paragraph & prev_par = *prev_it;
 313                 lyx::depth_type const prev_depth = getDepth(prev_it);
 314                 if (labeltype == prev_par.layout()->labeltype) {
 315                         if (prev_depth < min_depth) {
 316                                 return prev_par.itemdepth + 1;
 317                         }
 318                         else if (prev_depth == min_depth) {
 319                                 return prev_par.itemdepth;
 320                         }
 321                 }
 322                 min_depth = std::min(min_depth, prev_depth);
 323                 // small optimization: if we are at depth 0, we won't
 324                 // find anything else
 325                 if (prev_depth == 0) {
 326                         return 0;
 327                 }
 328         }
 329 }
 330
 331
 332 bool needEnumCounterReset(ParIterator const & it)
 333 {
 334         Paragraph const & par = *it;
 335         BOOST_ASSERT(par.layout()->labeltype == LABEL_ENUMERATE);
 336         lyx::depth_type const cur_depth = par.getDepth();
 337         ParIterator prev_it = it;
 338         while (prev_it.pit()) {
 339                 --prev_it.top().pit();
 340                 Paragraph const & prev_par = *prev_it;
 341                 if (prev_par.getDepth() <= cur_depth)
 342                         return  prev_par.layout()->labeltype != LABEL_ENUMERATE;
 343         }
 344         // start of nested inset: reset
 345         return true;
 346 }
 347
 348
 349 // set the counter of a paragraph. This includes the labels
 350 void setCounter(Buffer const & buf, ParIterator & it)
 351 {
 352         Paragraph & par = *it;
 353         BufferParams const & bufparams = buf.params();
 354         LyXTextClass const & textclass = bufparams.getLyXTextClass();
 355         LyXLayout_ptr const & layout = par.layout();
 356         Counters & counters = textclass.counters();
 357
 358         if (it.pit() == 0) {
 359                 par.params().appendix(par.params().startOfAppendix());
 360         } else {
 361                 par.params().appendix(it.plist()[it.pit() - 1].params().appendix());
 362                 if (!par.params().appendix() &&
 363                     par.params().startOfAppendix()) {
 364                         par.params().appendix(true);
 365                         textclass.counters().reset();
 366                 }
 367         }
 368
 369         // Compute the item depth of the paragraph
 370         par.itemdepth = getItemDepth(it);
 371
 372         // erase what was there before
 373         par.params().labelString(string());
 374
 375         if (layout->margintype == MARGIN_MANUAL) {
 376                 if (par.params().labelWidthString().empty())
 377                         par.setLabelWidthString(layout->labelstring());
 378         } else {
 379                 par.setLabelWidthString(string());
 380         }
 381
 382         // is it a layout that has an automatic label?
 383         if (layout->labeltype == LABEL_COUNTER) {
 384                 if (layout->toclevel <= buf.params().secnumdepth
 385                     && (layout->latextype != LATEX_ENVIRONMENT
 386                         || isFirstInSequence(it.pit(), it.plist()))) {
 387                         counters.step(layout->counter);
 388                         string label = expandLabel(buf, layout,
 389                                                    par.params().appendix());
 390                         par.params().labelString(label);
 391                 }
 392         } else if (layout->labeltype == LABEL_ITEMIZE) {
 393                 // At some point of time we should do something more
 394                 // clever here, like:
 395                 //   par.params().labelString(
 396                 //    bufparams.user_defined_bullet(par.itemdepth).getText());
 397                 // for now, use a simple hardcoded label
 398                 string itemlabel;
 399                 switch (par.itemdepth) {
 400                 case 0:
 401                         itemlabel = "*";
 402                         break;
 403                 case 1:
 404                         itemlabel = "-";
 405                         break;
 406                 case 2:
 407                         itemlabel = "@";
 408                         break;
 409                 case 3:
 410                         itemlabel = "·";
 411                         break;
 412                 }
 413
 414                 par.params().labelString(itemlabel);
 415         } else if (layout->labeltype == LABEL_ENUMERATE) {
 416                 // FIXME
 417                 // Yes I know this is a really, really! bad solution
 418                 // (Lgb)
 419                 string enumcounter = "enum";
 420
 421                 switch (par.itemdepth) {
 422                 case 2:
 423                         enumcounter += 'i';
 424                 case 1:
 425                         enumcounter += 'i';
 426                 case 0:
 427                         enumcounter += 'i';
 428                         break;
 429                 case 3:
 430                         enumcounter += "iv";
 431                         break;
 432                 default:
 433                         // not a valid enumdepth...
 434                         break;
 435                 }
 436
 437                 // Maybe we have to reset the enumeration counter.
 438                 if (needEnumCounterReset(it))
 439                         counters.reset(enumcounter);
 440
 441                 counters.step(enumcounter);
 442
 443                 string format;
 444
 445                 switch (par.itemdepth) {
 446                 case 0:
 447                         format = N_("\\arabic{enumi}.");
 448                         break;
 449                 case 1:
 450                         format = N_("(\\alph{enumii})");
 451                         break;
 452                 case 2:
 453                         format = N_("\\roman{enumiii}.");
 454                         break;
 455                 case 3:
 456                         format = N_("\\Alph{enumiv}.");
 457                         break;
 458                 default:
 459                         // not a valid enumdepth...
 460                         break;
 461                 }
 462
 463                 par.params().labelString(counters.counterLabel(buf.B_(format)));
 464         } else if (layout->labeltype == LABEL_BIBLIO) {// ale970302
 465                 counters.step("bibitem");
 466                 int number = counters.value("bibitem");
 467                 if (par.bibitem())
 468                         par.bibitem()->setCounter(number);
 469                 par.params().labelString(buf.B_(layout->labelstring()));
 470                 // In biblio should't be following counters but...
 471         } else if (layout->labeltype == LABEL_SENSITIVE) {
 472                 // Search for the first float or wrap inset in the iterator
 473                 string type;
 474                 size_t i = it.depth();
 475                 while (i > 0) {
 476                         --i;
 477                         InsetBase * const in = &it[i].inset();
 478                         if (in->lyxCode() == InsetBase::FLOAT_CODE
 479                             || in->lyxCode() == InsetBase::WRAP_CODE) {
 480                                 type = in->getInsetName();
 481                                 break;
 482                         }
 483                 }
 484
 485                 string s;
 486                 if (!type.empty()) {
 487                         Floating const & fl = textclass.floats().getType(type);
 488
 489                         counters.step(fl.type());
 490
 491                         // Doesn't work... yet.
 492                         s = bformat(_("%1$s #:"), buf.B_(fl.name()));
 493                 } else {
 494                         // par->SetLayout(0);
 495                         s = buf.B_(layout->labelstring());
 496                 }
 497
 498                 par.params().labelString(s);
 499         } else
 500                 par.params().labelString(buf.B_(layout->labelstring()));
 501 }
 502
 503 } // anon namespace
 504
 505
 506 void updateCounters(Buffer const & buf)
 507 {
 508         // start over
 509         buf.params().getLyXTextClass().counters().reset();
 510
 511         for (ParIterator it = par_iterator_begin(buf.inset()); it; ++it) {
 512                 // reduce depth if necessary
 513                 if (it.pit()) {
 514                         Paragraph const & prevpar = it.plist()[it.pit() - 1];
 515                         it->params().depth(min(it->params().depth(),
 516                                                prevpar.getMaxDepthAfter()));
 517                 } else
 518                         it->params().depth(0);
 519
 520                 // set the counter for this paragraph
 521                 setCounter(buf, it);
 522         }
 523 }
 524
 525
 526 string expandLabel(Buffer const & buf,
 527         LyXLayout_ptr const & layout, bool appendix)
 528 {
 529         LyXTextClass const & tclass = buf.params().getLyXTextClass();
 530
 531         string fmt = buf.B_(appendix ? layout->labelstring_appendix()
 532                             : layout->labelstring());
 533
 534         // handle 'inherited level parts' in 'fmt',
 535         // i.e. the stuff between '@' in   '@Section@.\arabic{subsection}'
 536         size_t const i = fmt.find('@', 0);
 537         if (i != string::npos) {
 538                 size_t const j = fmt.find('@', i + 1);
 539                 if (j != string::npos) {
 540                         string parent(fmt, i + 1, j - i - 1);
 541                         string label = expandLabel(buf, tclass[parent], appendix);
 542                         fmt = string(fmt, 0, i) + label + string(fmt, j + 1, string::npos);
 543                 }
 544         }
 545
 546         return tclass.counters().counterLabel(fmt);
 547 }
 548
 549