src/BufferView.C

   1 /**
   2  * \file BufferView.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Alfredo Braunstein
   7  * \author Lars Gullik Bjønnes
   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 "BufferView.h"
  18
  19 #include "buffer.h"
  20 #include "buffer_funcs.h"
  21 #include "bufferlist.h"
  22 #include "bufferparams.h"
  23 #include "coordcache.h"
  24 #include "CutAndPaste.h"
  25 #include "debug.h"
  26 #include "dispatchresult.h"
  27 #include "errorlist.h"
  28 #include "factory.h"
  29 #include "FloatList.h"
  30 #include "funcrequest.h"
  31 #include "FuncStatus.h"
  32 #include "gettext.h"
  33 #include "intl.h"
  34 #include "insetiterator.h"
  35 #include "language.h"
  36 #include "LaTeXFeatures.h"
  37 #include "lyx_cb.h" // added for Dispatch functions
  38 #include "lyx_main.h"
  39 #include "lyxfind.h"
  40 #include "lyxfunc.h"
  41 #include "lyxlayout.h"
  42 #include "lyxtext.h"
  43 #include "lyxtextclass.h"
  44 #include "lyxrc.h"
  45 #include "session.h"
  46 #include "paragraph.h"
  47 #include "paragraph_funcs.h"
  48 #include "ParagraphParameters.h"
  49 #include "pariterator.h"
  50 #include "texrow.h"
  51 #include "toc.h"
  52 #include "undo.h"
  53 #include "vspace.h"
  54 #include "WordLangTuple.h"
  55 #include "metricsinfo.h"
  56
  57 #include "insets/insetbibtex.h"
  58 #include "insets/insetcommand.h" // ChangeRefs
  59 #include "insets/insetref.h"
  60 #include "insets/insettext.h"
  61
  62 #include "frontends/Alert.h"
  63 #include "frontends/FileDialog.h"
  64 #include "frontends/FontMetrics.h"
  65
  66 #include "graphics/Previews.h"
  67
  68 #include "support/convert.h"
  69 #include "support/filefilterlist.h"
  70 #include "support/filetools.h"
  71 #include "support/package.h"
  72 #include "support/types.h"
  73
  74 #include <boost/bind.hpp>
  75 #include <boost/current_function.hpp>
  76
  77 #include <functional>
  78 #include <vector>
  79
  80
  81 namespace lyx {
  82
  83 using support::addPath;
  84 using support::bformat;
  85 using support::FileFilterList;
  86 using support::fileSearch;
  87 using support::isDirWriteable;
  88 using support::makeDisplayPath;
  89 using support::makeAbsPath;
  90 using support::package;
  91
  92 using std::distance;
  93 using std::endl;
  94 using std::istringstream;
  95 using std::make_pair;
  96 using std::min;
  97 using std::max;
  98 using std::mem_fun_ref;
  99 using std::string;
 100 using std::vector;
 101
 102 namespace Alert = frontend::Alert;
 103
 104 namespace {
 105
 106 /// Return an inset of this class if it exists at the current cursor position
 107 template <class T>
 108 T * getInsetByCode(LCursor & cur, InsetBase::Code code)
 109 {
 110         T * inset = 0;
 111         DocIterator it = cur;
 112         if (it.nextInset() &&
 113             it.nextInset()->lyxCode() == code) {
 114                 inset = static_cast<T*>(it.nextInset());
 115         }
 116         return inset;
 117 }
 118
 119 } // anon namespace
 120
 121
 122 BufferView::BufferView()
 123         : width_(0), height_(0), buffer_(0), wh_(0),
 124           cursor_(*this),
 125           multiparsel_cache_(false), anchor_ref_(0), offset_ref_(0),
 126           intl_(new Intl)
 127 {
 128         xsel_cache_.set = false;
 129         intl_->initKeyMapper(lyxrc.use_kbmap);
 130 }
 131
 132
 133 BufferView::~BufferView()
 134 {
 135 }
 136
 137
 138 Buffer * BufferView::buffer() const
 139 {
 140         return buffer_;
 141 }
 142
 143
 144 void BufferView::setBuffer(Buffer * b)
 145 {
 146         lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 147                             << "[ b = " << b << "]" << endl;
 148
 149         if (buffer_) {
 150                 // Save the actual cursor position and anchor inside the
 151                 // buffer so that it can be restored in case we rechange
 152                 // to this buffer later on.
 153                 buffer_->saveCursor(cursor_.selectionBegin(),
 154                                     cursor_.selectionEnd());
 155                 // current buffer is going to be switched-off, save cursor pos
 156                 LyX::ref().session().lastFilePos().save(buffer_->fileName(),
 157                         boost::tie(cursor_.pit(), cursor_.pos()) );
 158         }
 159
 160         // If we're quitting lyx, don't bother updating stuff
 161         if (quitting) {
 162                 buffer_ = 0;
 163                 return;
 164         }
 165
 166         // If we are closing current buffer, switch to the first in
 167         // buffer list.
 168         if (!b) {
 169                 lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 170                                     << " No Buffer!" << endl;
 171                 // We are closing the buffer, use the first buffer as current
 172                 buffer_ = theBufferList().first();
 173         } else {
 174                 // Set current buffer
 175                 buffer_ = b;
 176         }
 177
 178         // Reset old cursor
 179         cursor_ = LCursor(*this);
 180         anchor_ref_ = 0;
 181         offset_ref_ = 0;
 182
 183         if (buffer_) {
 184                 lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 185                                     << "Buffer addr: " << buffer_ << endl;
 186                 cursor_.push(buffer_->inset());
 187                 cursor_.resetAnchor();
 188                 buffer_->text().init(this);
 189                 buffer_->text().setCurrentFont(cursor_);
 190                 if (buffer_->getCursor().size() > 0 &&
 191                     buffer_->getAnchor().size() > 0)
 192                 {
 193                         cursor_.setCursor(buffer_->getAnchor().asDocIterator(&(buffer_->inset())));
 194                         cursor_.resetAnchor();
 195                         cursor_.setCursor(buffer_->getCursor().asDocIterator(&(buffer_->inset())));
 196                         cursor_.setSelection();
 197                 }
 198         }
 199
 200         update();
 201
 202         if (buffer_ && graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 203                 graphics::Previews::get().generateBufferPreviews(*buffer_);
 204 }
 205
 206
 207 bool BufferView::loadLyXFile(string const & filename, bool tolastfiles)
 208 {
 209         // Get absolute path of file and add ".lyx"
 210         // to the filename if necessary
 211         string s = fileSearch(string(), filename, "lyx");
 212
 213         bool const found = !s.empty();
 214
 215         if (!found)
 216                 s = filename;
 217
 218         // File already open?
 219         if (theBufferList().exists(s)) {
 220                 docstring const file = makeDisplayPath(s, 20);
 221                 docstring text = bformat(_("The document %1$s is already "
 222                                                      "loaded.\n\nDo you want to revert "
 223                                                      "to the saved version?"), file);
 224                 int const ret = Alert::prompt(_("Revert to saved document?"),
 225                         text, 0, 1,  _("&Revert"), _("&Switch to document"));
 226
 227                 if (ret != 0) {
 228                         setBuffer(theBufferList().getBuffer(s));
 229                         return true;
 230                 }
 231                 // FIXME: should be LFUN_REVERT
 232                 if (!theBufferList().close(theBufferList().getBuffer(s), false))
 233                         return false;
 234                 // Fall through to new load. (Asger)
 235                 buffer_ = 0;
 236         }
 237
 238         Buffer * b = 0;
 239
 240         if (found) {
 241                 b = theBufferList().newBuffer(s);
 242                 if (!lyx::loadLyXFile(b, s)) {
 243                         theBufferList().release(b);
 244                         return false;
 245                 }
 246         } else {
 247                 docstring text = bformat(_("The document %1$s does not yet "
 248                                                      "exist.\n\nDo you want to create "
 249                                                      "a new document?"), from_utf8(s));
 250                 int const ret = Alert::prompt(_("Create new document?"),
 251                          text, 0, 1, _("&Create"), _("Cancel"));
 252
 253                 if (ret == 0) {
 254                         b = newFile(s, string(), true);
 255                         if (!b)
 256                                 return false;
 257                 } else
 258                         return false;
 259         }
 260
 261         setBuffer(b);
 262         // Send the "errors" signal in case of parsing errors
 263         b->errors("Parse");
 264
 265         // scroll to the position when the file was last closed
 266         if (lyxrc.use_lastfilepos) {
 267                 pit_type pit;
 268                 pos_type pos;
 269                 boost::tie(pit, pos) = LyX::ref().session().lastFilePos().load(s);
 270                 // I am not sure how to separate the following part to a function
 271                 // so I will leave this to Lars.
 272                 //
 273                 // check pit since the document may be externally changed.
 274                 if ( static_cast<size_t>(pit) < b->paragraphs().size() ) {
 275                         ParIterator it = b->par_iterator_begin();
 276                         ParIterator const end = b->par_iterator_end();
 277                         for (; it != end; ++it)
 278                                 if (it.pit() == pit) {
 279                                         // restored pos may be bigger than it->size
 280                                         setCursor(makeDocIterator(it, min(pos, it->size())));
 281                                         update(Update::FitCursor);
 282                                         break;
 283                                 }
 284                 }
 285         }
 286
 287         if (tolastfiles)
 288                 LyX::ref().session().lastFiles().add(b->fileName());
 289
 290         return true;
 291 }
 292
 293
 294 void BufferView::reload()
 295 {
 296         string const fn = buffer_->fileName();
 297         if (theBufferList().close(buffer_, false))
 298                 loadLyXFile(fn);
 299 }
 300
 301
 302 void BufferView::resize()
 303 {
 304         if (!buffer_)
 305                 return;
 306
 307         lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION << endl;
 308
 309         buffer_->text().init(this);
 310         update();
 311         switchKeyMap();
 312 }
 313
 314
 315 bool BufferView::fitCursor()
 316 {
 317         if (bv_funcs::status(this, cursor_) == bv_funcs::CUR_INSIDE) {
 318                 frontend::FontMetrics const & fm =
 319                         theFontMetrics(cursor_.getFont());
 320                 int const asc = fm.maxAscent();
 321                 int const des = fm.maxDescent();
 322                 Point const p = bv_funcs::getPos(*this, cursor_, cursor_.boundary());
 323                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 324                         return false;
 325         }
 326         center();
 327         return true;
 328 }
 329
 330
 331 bool BufferView::multiParSel()
 332 {
 333         if (!cursor_.selection())
 334                 return false;
 335         bool ret = multiparsel_cache_;
 336         multiparsel_cache_ = cursor_.selBegin().pit() != cursor_.selEnd().pit();
 337         // Either this, or previous selection spans paragraphs
 338         return ret || multiparsel_cache_;
 339 }
 340
 341
 342 bool BufferView::update(Update::flags flags)
 343 {
 344         // This is close to a hot-path.
 345         if (lyxerr.debugging(Debug::DEBUG)) {
 346                 lyxerr[Debug::DEBUG]
 347                         << BOOST_CURRENT_FUNCTION
 348                         << "[fitcursor = " << (flags & Update::FitCursor)
 349                         << ", forceupdate = " << (flags & Update::Force)
 350                         << ", singlepar = " << (flags & Update::SinglePar)
 351                         << "]  buffer: " << buffer_ << endl;
 352         }
 353
 354         // Check needed to survive LyX startup
 355         if (!buffer_)
 356                 return false;
 357
 358         if (lyxerr.debugging(Debug::WORKAREA)) {
 359                 lyxerr[Debug::WORKAREA] << "BufferView::update" << std::endl;
 360         }
 361
 362         // Update macro store
 363         buffer_->buildMacros();
 364
 365         // First drawing step
 366         updateMetrics(flags & Update::SinglePar);
 367
 368         // The second drawing step is done in WorkArea::redraw() if needed.
 369         bool const need_second_step =
 370                 (flags & (Update::Force | Update::FitCursor | Update::MultiParSel))
 371                 && (fitCursor() || multiParSel());
 372
 373         return need_second_step;
 374 }
 375
 376
 377 void BufferView::updateScrollbar()
 378 {
 379         if (!buffer_) {
 380                 lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION
 381                                      << " no text in updateScrollbar" << endl;
 382                 scrollbarParameters_.reset();
 383                 return;
 384         }
 385
 386         LyXText & t = buffer_->text();
 387         int const parsize = int(t.paragraphs().size() - 1);
 388         if (anchor_ref_ >  parsize)  {
 389                 anchor_ref_ = parsize;
 390                 offset_ref_ = 0;
 391         }
 392
 393         if (lyxerr.debugging(Debug::GUI)) {
 394                 lyxerr[Debug::GUI]
 395                         << BOOST_CURRENT_FUNCTION
 396                         << " Updating scrollbar: height: " << t.paragraphs().size()
 397                         << " curr par: " << cursor_.bottom().pit()
 398                         << " default height " << defaultRowHeight() << endl;
 399         }
 400
 401         // It would be better to fix the scrollbar to understand
 402         // values in [0..1] and divide everything by wh
 403
 404         // estimated average paragraph height:
 405         if (wh_ == 0)
 406                 wh_ = height_ / 4;
 407         int h = t.getPar(anchor_ref_).height();
 408
 409         // Normalize anchor/offset (MV):
 410         while (offset_ref_ > h && anchor_ref_ < parsize) {
 411                 anchor_ref_++;
 412                 offset_ref_ -= h;
 413                 h = t.getPar(anchor_ref_).height();
 414         }
 415         // Look at paragraph heights on-screen
 416         int sumh = 0;
 417         int nh = 0;
 418         for (pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 419                 if (sumh > height_)
 420                         break;
 421                 int const h2 = t.getPar(pit).height();
 422                 sumh += h2;
 423                 nh++;
 424         }
 425
 426         BOOST_ASSERT(nh);
 427         int const hav = sumh / nh;
 428         // More realistic average paragraph height
 429         if (hav > wh_)
 430                 wh_ = hav;
 431
 432         BOOST_ASSERT(h);
 433         scrollbarParameters_.height = (parsize + 1) * wh_;
 434         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 435         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 436 }
 437
 438
 439 ScrollbarParameters const & BufferView::scrollbarParameters() const
 440 {
 441         return scrollbarParameters_;
 442 }
 443
 444
 445 void BufferView::scrollDocView(int value)
 446 {
 447         lyxerr[Debug::GUI] << BOOST_CURRENT_FUNCTION
 448                            << "[ value = " << value << "]" << endl;
 449
 450         if (!buffer_)
 451                 return;
 452
 453         LyXText & t = buffer_->text();
 454
 455         float const bar = value / float(wh_ * t.paragraphs().size());
 456
 457         anchor_ref_ = int(bar * t.paragraphs().size());
 458         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 459                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 460         t.redoParagraph(*this, anchor_ref_);
 461         int const h = t.getPar(anchor_ref_).height();
 462         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 463 }
 464
 465
 466 void BufferView::setCursorFromScrollbar()
 467 {
 468         LyXText & t = buffer_->text();
 469
 470         int const height = 2 * defaultRowHeight();
 471         int const first = height;
 472         int const last = height_ - height;
 473         LCursor & cur = cursor_;
 474
 475         bv_funcs::CurStatus st = bv_funcs::status(this, cur);
 476
 477         switch (st) {
 478         case bv_funcs::CUR_ABOVE:
 479                 t.setCursorFromCoordinates(cur, 0, first);
 480                 cur.clearSelection();
 481                 break;
 482         case bv_funcs::CUR_BELOW:
 483                 t.setCursorFromCoordinates(cur, 0, last);
 484                 cur.clearSelection();
 485                 break;
 486         case bv_funcs::CUR_INSIDE:
 487                 int const y = bv_funcs::getPos(*this, cur, cur.boundary()).y_;
 488                 int const newy = min(last, max(y, first));
 489                 if (y != newy) {
 490                         cur.reset(buffer_->inset());
 491                         t.setCursorFromCoordinates(cur, 0, newy);
 492                 }
 493         }
 494 }
 495
 496
 497 Change const BufferView::getCurrentChange() const
 498 {
 499         if (!cursor_.selection())
 500                 return Change(Change::UNCHANGED);
 501
 502         DocIterator dit = cursor_.selectionBegin();
 503         return dit.paragraph().lookupChange(dit.pos());
 504 }
 505
 506
 507 void BufferView::saveBookmark(bool persistent)
 508 {
 509         LyX::ref().session().bookmarks().save(
 510                 buffer_->fileName(),
 511                 cursor_.paragraph().id(),
 512                 cursor_.pos(),
 513                 persistent
 514         );
 515         if (persistent)
 516                 // emit message signal.
 517                 message(_("Save bookmark"));
 518 }
 519
 520
 521 void BufferView::moveToPosition(int par_id, pos_type par_pos)
 522 {
 523         cursor_.clearSelection();
 524
 525         ParIterator par = buffer_->getParFromID(par_id);
 526         if (par == buffer_->par_iterator_end())
 527                 return;
 528
 529         setCursor(makeDocIterator(par, min(par->size(), par_pos)));
 530 }
 531
 532
 533 void BufferView::switchKeyMap()
 534 {
 535         if (!lyxrc.rtl_support)
 536                 return;
 537
 538         if (getLyXText()->real_current_font.isRightToLeft()) {
 539                 if (intl_->keymap == Intl::PRIMARY)
 540                         intl_->keyMapSec();
 541         } else {
 542                 if (intl_->keymap == Intl::SECONDARY)
 543                         intl_->keyMapPrim();
 544         }
 545 }
 546
 547
 548 int BufferView::workWidth() const
 549 {
 550         return width_;
 551 }
 552
 553
 554 void BufferView::center()
 555 {
 556         CursorSlice & bot = cursor_.bottom();
 557         pit_type const pit = bot.pit();
 558         bot.text()->redoParagraph(*this, pit);
 559         Paragraph const & par = bot.text()->paragraphs()[pit];
 560         anchor_ref_ = pit;
 561         offset_ref_ = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary()).y_
 562                 + par.ascent() - height_ / 2;
 563 }
 564
 565
 566 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 567 {
 568         FuncStatus flag;
 569
 570         switch (cmd.action) {
 571
 572         case LFUN_UNDO:
 573                 flag.enabled(!buffer_->undostack().empty());
 574                 break;
 575         case LFUN_REDO:
 576                 flag.enabled(!buffer_->redostack().empty());
 577                 break;
 578         case LFUN_FILE_INSERT:
 579         case LFUN_FILE_INSERT_ASCII_PARA:
 580         case LFUN_FILE_INSERT_ASCII:
 581         case LFUN_BOOKMARK_SAVE:
 582                 // FIXME: Actually, these LFUNS should be moved to LyXText
 583                 flag.enabled(cursor_.inTexted());
 584                 break;
 585         case LFUN_FONT_STATE:
 586         case LFUN_LABEL_INSERT:
 587         case LFUN_PARAGRAPH_GOTO:
 588         // FIXME handle non-trivially
 589         case LFUN_OUTLINE_UP:
 590         case LFUN_OUTLINE_DOWN:
 591         case LFUN_OUTLINE_IN:
 592         case LFUN_OUTLINE_OUT:
 593         case LFUN_NOTE_NEXT:
 594         case LFUN_REFERENCE_NEXT:
 595         case LFUN_WORD_FIND:
 596         case LFUN_WORD_REPLACE:
 597         case LFUN_MARK_OFF:
 598         case LFUN_MARK_ON:
 599         case LFUN_MARK_TOGGLE:
 600         case LFUN_SCREEN_RECENTER:
 601         case LFUN_BIBTEX_DATABASE_ADD:
 602         case LFUN_BIBTEX_DATABASE_DEL:
 603         case LFUN_WORDS_COUNT:
 604         case LFUN_NEXT_INSET_TOGGLE:
 605                 flag.enabled(true);
 606                 break;
 607
 608         case LFUN_LABEL_GOTO: {
 609                 flag.enabled(!cmd.argument().empty()
 610                     || getInsetByCode<InsetRef>(cursor_, InsetBase::REF_CODE));
 611                 break;
 612         }
 613
 614         case LFUN_CHANGES_TRACK:
 615                 flag.enabled(true);
 616                 flag.setOnOff(buffer_->params().trackChanges);
 617                 break;
 618
 619         case LFUN_CHANGES_OUTPUT: {
 620                 OutputParams runparams;
 621                 LaTeXFeatures features(*buffer_, buffer_->params(), runparams);
 622                 flag.enabled(buffer_ && features.isAvailable("dvipost"));
 623                 flag.setOnOff(buffer_->params().outputChanges);
 624                 break;
 625         }
 626
 627         case LFUN_CHANGES_MERGE:
 628         case LFUN_CHANGE_NEXT:
 629         case LFUN_ALL_CHANGES_ACCEPT:
 630         case LFUN_ALL_CHANGES_REJECT:
 631                 flag.enabled(buffer_); // FIXME: Change tracking (MG)
 632                 break;
 633
 634         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 635                 flag.setOnOff(buffer_->params().compressed);
 636                 break;
 637         }
 638
 639         default:
 640                 flag.enabled(false);
 641         }
 642
 643         return flag;
 644 }
 645
 646
 647 bool BufferView::dispatch(FuncRequest const & cmd)
 648 {
 649         //lyxerr << BOOST_CURRENT_FUNCTION
 650         //       << [ cmd = " << cmd << "]" << endl;
 651
 652         // Make sure that the cached BufferView is correct.
 653         lyxerr[Debug::ACTION] << BOOST_CURRENT_FUNCTION
 654                 << " action[" << cmd.action << ']'
 655                 << " arg[" << to_utf8(cmd.argument()) << ']'
 656                 << " x[" << cmd.x << ']'
 657                 << " y[" << cmd.y << ']'
 658                 << " button[" << cmd.button() << ']'
 659                 << endl;
 660
 661         LCursor & cur = cursor_;
 662
 663         switch (cmd.action) {
 664
 665         case LFUN_UNDO:
 666                 if (buffer_) {
 667                         cur.message(_("Undo"));
 668                         cur.clearSelection();
 669                         if (!textUndo(*this))
 670                                 cur.message(_("No further undo information"));
 671                         update();
 672                         switchKeyMap();
 673                 }
 674                 break;
 675
 676         case LFUN_REDO:
 677                 if (buffer_) {
 678                         cur.message(_("Redo"));
 679                         cur.clearSelection();
 680                         if (!textRedo(*this))
 681                                 cur.message(_("No further redo information"));
 682                         update();
 683                         switchKeyMap();
 684                 }
 685                 break;
 686
 687         case LFUN_FILE_INSERT:
 688                 // FIXME: We don't know the encoding of filenames
 689                 menuInsertLyXFile(to_utf8(cmd.argument()));
 690                 break;
 691
 692         case LFUN_FILE_INSERT_ASCII_PARA:
 693                 // FIXME: We don't know the encoding of filenames
 694                 insertAsciiFile(this, to_utf8(cmd.argument()), true);
 695                 break;
 696
 697         case LFUN_FILE_INSERT_ASCII:
 698                 // FIXME: We don't know the encoding of filenames
 699                 insertAsciiFile(this, to_utf8(cmd.argument()), false);
 700                 break;
 701
 702         case LFUN_FONT_STATE:
 703                 cur.message(from_utf8(cur.currentState()));
 704                 break;
 705
 706         case LFUN_BOOKMARK_SAVE:
 707                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 708                 break;
 709
 710         case LFUN_LABEL_GOTO: {
 711                 docstring label = cmd.argument();
 712                 if (label.empty()) {
 713                         InsetRef * inset =
 714                                 getInsetByCode<InsetRef>(cursor_,
 715                                                          InsetBase::REF_CODE);
 716                         if (inset) {
 717                                 label = inset->getParam("reference");
 718                                 // persistent=false: use temp_bookmark
 719                                 saveBookmark(false);
 720                         }
 721                 }
 722
 723                 if (!label.empty())
 724                         gotoLabel(label);
 725                 break;
 726         }
 727
 728         case LFUN_PARAGRAPH_GOTO: {
 729                 int const id = convert<int>(to_utf8(cmd.argument()));
 730                 ParIterator par = buffer_->getParFromID(id);
 731                 if (par == buffer_->par_iterator_end()) {
 732                         lyxerr[Debug::INFO] << "No matching paragraph found! ["
 733                                             << id << ']' << endl;
 734                         break;
 735                 } else {
 736                         lyxerr[Debug::INFO] << "Paragraph " << par->id()
 737                                             << " found." << endl;
 738                 }
 739
 740                 // Set the cursor
 741                 setCursor(makeDocIterator(par, 0));
 742
 743                 update();
 744                 switchKeyMap();
 745                 break;
 746         }
 747
 748         case LFUN_OUTLINE_UP:
 749                 toc::outline(toc::Up, cursor_);
 750                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 751                 updateLabels(*buffer_);
 752                 break;
 753         case LFUN_OUTLINE_DOWN:
 754                 toc::outline(toc::Down, cursor_);
 755                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 756                 updateLabels(*buffer_);
 757                 break;
 758         case LFUN_OUTLINE_IN:
 759                 toc::outline(toc::In, cursor_);
 760                 updateLabels(*buffer_);
 761                 break;
 762         case LFUN_OUTLINE_OUT:
 763                 toc::outline(toc::Out, cursor_);
 764                 updateLabels(*buffer_);
 765                 break;
 766
 767         case LFUN_NOTE_NEXT:
 768                 bv_funcs::gotoInset(this, InsetBase::NOTE_CODE, false);
 769                 break;
 770
 771         case LFUN_REFERENCE_NEXT: {
 772                 vector<InsetBase_code> tmp;
 773                 tmp.push_back(InsetBase::LABEL_CODE);
 774                 tmp.push_back(InsetBase::REF_CODE);
 775                 bv_funcs::gotoInset(this, tmp, true);
 776                 break;
 777         }
 778
 779         case LFUN_CHANGES_TRACK:
 780                 buffer_->params().trackChanges = !buffer_->params().trackChanges;
 781                 break;
 782
 783         case LFUN_CHANGES_OUTPUT: {
 784                 buffer_->params().outputChanges = !buffer_->params().outputChanges;
 785                 break;
 786         }
 787
 788         case LFUN_CHANGE_NEXT:
 789                 findNextChange(this);
 790                 break;
 791
 792         case LFUN_CHANGES_MERGE:
 793                 if (findNextChange(this))
 794                         showDialog("changes");
 795                 break;
 796
 797         case LFUN_ALL_CHANGES_ACCEPT: {
 798                 cursor_.reset(buffer_->inset());
 799 #ifdef WITH_WARNINGS
 800 #warning FIXME changes
 801 #endif
 802                 while (findNextChange(this))
 803                         getLyXText()->acceptChange(cursor_);
 804                 update();
 805                 break;
 806         }
 807
 808         case LFUN_ALL_CHANGES_REJECT: {
 809                 cursor_.reset(buffer_->inset());
 810 #ifdef WITH_WARNINGS
 811 #warning FIXME changes
 812 #endif
 813                 while (findNextChange(this))
 814                         getLyXText()->rejectChange(cursor_);
 815                 break;
 816         }
 817
 818         case LFUN_WORD_FIND:
 819                 find(this, cmd);
 820                 break;
 821
 822         case LFUN_WORD_REPLACE:
 823                 replace(this, cmd);
 824                 break;
 825
 826         case LFUN_MARK_OFF:
 827                 cur.clearSelection();
 828                 cur.resetAnchor();
 829                 cur.message(from_utf8(N_("Mark off")));
 830                 break;
 831
 832         case LFUN_MARK_ON:
 833                 cur.clearSelection();
 834                 cur.mark() = true;
 835                 cur.resetAnchor();
 836                 cur.message(from_utf8(N_("Mark on")));
 837                 break;
 838
 839         case LFUN_MARK_TOGGLE:
 840                 cur.clearSelection();
 841                 if (cur.mark()) {
 842                         cur.mark() = false;
 843                         cur.message(from_utf8(N_("Mark removed")));
 844                 } else {
 845                         cur.mark() = true;
 846                         cur.message(from_utf8(N_("Mark set")));
 847                 }
 848                 cur.resetAnchor();
 849                 break;
 850
 851         case LFUN_SCREEN_RECENTER:
 852                 center();
 853                 break;
 854
 855         case LFUN_BIBTEX_DATABASE_ADD: {
 856                 LCursor tmpcur = cursor_;
 857                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 858                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 859                                                 InsetBase::BIBTEX_CODE);
 860                 if (inset) {
 861                         if (inset->addDatabase(to_utf8(cmd.argument())))
 862                                 buffer_->updateBibfilesCache();
 863                 }
 864                 break;
 865         }
 866
 867         case LFUN_BIBTEX_DATABASE_DEL: {
 868                 LCursor tmpcur = cursor_;
 869                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 870                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 871                                                 InsetBase::BIBTEX_CODE);
 872                 if (inset) {
 873                         if (inset->delDatabase(to_utf8(cmd.argument())))
 874                                 buffer_->updateBibfilesCache();
 875                 }
 876                 break;
 877         }
 878
 879         case LFUN_WORDS_COUNT: {
 880                 DocIterator from, to;
 881                 if (cur.selection()) {
 882                         from = cur.selectionBegin();
 883                         to = cur.selectionEnd();
 884                 } else {
 885                         from = doc_iterator_begin(buffer_->inset());
 886                         to = doc_iterator_end(buffer_->inset());
 887                 }
 888                 int const count = countWords(from, to);
 889                 docstring message;
 890                 if (count != 1) {
 891                         if (cur.selection())
 892                                 message = bformat(_("%1$d words in selection."),
 893                                           count);
 894                                 else
 895                                         message = bformat(_("%1$d words in document."),
 896                                                           count);
 897                 }
 898                 else {
 899                         if (cur.selection())
 900                                 message = _("One word in selection.");
 901                         else
 902                                 message = _("One word in document.");
 903                 }
 904
 905                 Alert::information(_("Count words"), message);
 906         }
 907                 break;
 908
 909         case LFUN_BUFFER_TOGGLE_COMPRESSION:
 910                 // turn compression on/off
 911                 buffer_->params().compressed = !buffer_->params().compressed;
 912                 break;
 913
 914         case LFUN_NEXT_INSET_TOGGLE: {
 915                 // this is the real function we want to invoke
 916                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
 917                 // if there is an inset at cursor, see whether it
 918                 // wants to toggle.
 919                 InsetBase * inset = cur.nextInset();
 920                 if (inset && inset->isActive()) {
 921                         LCursor tmpcur = cur;
 922                         tmpcur.pushLeft(*inset);
 923                         inset->dispatch(tmpcur, tmpcmd);
 924                         if (tmpcur.result().dispatched()) {
 925                                 cur.dispatched();
 926                         }
 927                 }
 928                 // if it did not work, try the underlying inset.
 929                 if (!cur.result().dispatched())
 930                         cur.dispatch(tmpcmd);
 931
 932                 if (cur.result().dispatched())
 933                         cur.clearSelection();
 934
 935                 break;
 936         }
 937
 938         default:
 939                 return false;
 940         }
 941
 942         return true;
 943 }
 944
 945
 946 docstring const BufferView::requestSelection()
 947 {
 948         if (!buffer_)
 949                 return docstring();
 950
 951         LCursor & cur = cursor_;
 952
 953         if (!cur.selection()) {
 954                 xsel_cache_.set = false;
 955                 return docstring();
 956         }
 957
 958         if (!xsel_cache_.set ||
 959             cur.top() != xsel_cache_.cursor ||
 960             cur.anchor_.top() != xsel_cache_.anchor)
 961         {
 962                 xsel_cache_.cursor = cur.top();
 963                 xsel_cache_.anchor = cur.anchor_.top();
 964                 xsel_cache_.set = cur.selection();
 965                 return cur.selectionAsString(false);
 966         }
 967         return docstring();
 968 }
 969
 970
 971 void BufferView::clearSelection()
 972 {
 973         if (buffer_) {
 974                 cursor_.clearSelection();
 975                 xsel_cache_.set = false;
 976         }
 977 }
 978
 979
 980 void BufferView::workAreaResize(int width, int height)
 981 {
 982         bool const widthChange = width != width_;
 983         bool const heightChange = height != height_;
 984
 985         // Update from work area
 986         width_ = width;
 987         height_ = height;
 988
 989         if (buffer_)
 990                 resize();
 991
 992         update();
 993 }
 994
 995
 996 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
 997 {
 998         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
 999
1000         // This is only called for mouse related events including
1001         // LFUN_FILE_OPEN generated by drag-and-drop.
1002         FuncRequest cmd = cmd0;
1003
1004         if (!buffer_)
1005                 return false;
1006
1007         LCursor cur(*this);
1008         cur.push(buffer_->inset());
1009         cur.selection() = cursor_.selection();
1010
1011         // Doesn't go through lyxfunc, so we need to update
1012         // the layout choice etc. ourselves
1013
1014         // E.g. Qt mouse press when no buffer
1015         if (!buffer_)
1016                 return false;
1017
1018         // Either the inset under the cursor or the
1019         // surrounding LyXText will handle this event.
1020
1021         // Build temporary cursor.
1022         cmd.y = min(max(cmd.y, -1), height_);
1023         InsetBase * inset = buffer_->text().editXY(cur, cmd.x, cmd.y);
1024         //lyxerr << BOOST_CURRENT_FUNCTION
1025         //       << " * hit inset at tip: " << inset << endl;
1026         //lyxerr << BOOST_CURRENT_FUNCTION
1027         //       << " * created temp cursor:" << cur << endl;
1028
1029         // Put anchor at the same position.
1030         cur.resetAnchor();
1031
1032         // Try to dispatch to an non-editable inset near this position
1033         // via the temp cursor. If the inset wishes to change the real
1034         // cursor it has to do so explicitly by using
1035         //  cur.bv().cursor() = cur;  (or similar)
1036         if (inset)
1037                 inset->dispatch(cur, cmd);
1038
1039         // Now dispatch to the temporary cursor. If the real cursor should
1040         // be modified, the inset's dispatch has to do so explicitly.
1041         if (!cur.result().dispatched())
1042                 cur.dispatch(cmd);
1043
1044         if (cur.result().dispatched()) {
1045                 // Redraw if requested or necessary.
1046                 if (cur.result().update())
1047                         update(Update::FitCursor | Update::Force);
1048                 else
1049                         update(Update::FitCursor | Update::MultiParSel);
1050         }
1051
1052         return true;
1053 }
1054
1055
1056 void BufferView::scroll(int /*lines*/)
1057 {
1058 //      if (!buffer_)
1059 //              return;
1060 //
1061 //      LyXText const * t = &buffer_->text();
1062 //      int const line_height = defaultRowHeight();
1063 //
1064 //      // The new absolute coordinate
1065 //      int new_top_y = top_y() + lines * line_height;
1066 //
1067 //      // Restrict to a valid value
1068 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
1069 //      new_top_y = std::max(0, new_top_y);
1070 //
1071 //      scrollDocView(new_top_y);
1072 //
1073 //      // Update the scrollbar.
1074 //      workArea_->setScrollbarParams(t->height(), top_y(), defaultRowHeight());}
1075 }
1076
1077
1078 void BufferView::setCursorFromRow(int row)
1079 {
1080         int tmpid = -1;
1081         int tmppos = -1;
1082
1083         buffer_->texrow().getIdFromRow(row, tmpid, tmppos);
1084
1085         if (tmpid == -1)
1086                 buffer_->text().setCursor(cursor_, 0, 0);
1087         else
1088                 buffer_->text().setCursor(cursor_, buffer_->getParFromID(tmpid).pit(), tmppos);
1089 }
1090
1091
1092 void BufferView::gotoLabel(docstring const & label)
1093 {
1094         for (InsetIterator it = inset_iterator_begin(buffer_->inset()); it; ++it) {
1095                 vector<docstring> labels;
1096                 it->getLabelList(*buffer_, labels);
1097                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1098                         setCursor(it);
1099                         update();
1100                         return;
1101                 }
1102         }
1103 }
1104
1105
1106 LyXText * BufferView::getLyXText()
1107 {
1108         LyXText * text = cursor_.innerText();
1109         BOOST_ASSERT(text);
1110         return text;
1111 }
1112
1113
1114 LyXText const * BufferView::getLyXText() const
1115 {
1116         LyXText const * text = cursor_.innerText();
1117         BOOST_ASSERT(text);
1118         return text;
1119 }
1120
1121
1122 int BufferView::workHeight() const
1123 {
1124         return height_;
1125 }
1126
1127
1128 void BufferView::setCursor(DocIterator const & dit)
1129 {
1130         size_t const n = dit.depth();
1131         for (size_t i = 0; i < n; ++i)
1132                 dit[i].inset().edit(cursor_, true);
1133
1134         cursor_.setCursor(dit);
1135         cursor_.selection() = false;
1136 }
1137
1138
1139 void BufferView::mouseSetCursor(LCursor & cur)
1140 {
1141         BOOST_ASSERT(&cur.bv() == this);
1142
1143         // Has the cursor just left the inset?
1144         bool badcursor = false;
1145         if (&cursor_.inset() != &cur.inset())
1146                 badcursor = cursor_.inset().notifyCursorLeaves(cursor_);
1147
1148         // do the dEPM magic if needed
1149         // FIXME: move this to InsetText::notifyCursorLeaves?
1150         if (!badcursor && cursor_.inTexted())
1151                 cursor_.text()->deleteEmptyParagraphMechanism(cur, cursor_);
1152
1153         cursor_ = cur;
1154         cursor_.clearSelection();
1155         cursor_.setTargetX();
1156         finishUndo();
1157
1158 }
1159
1160
1161 void BufferView::putSelectionAt(DocIterator const & cur,
1162                                 int length, bool backwards)
1163 {
1164         cursor_.clearSelection();
1165
1166         setCursor(cur);
1167
1168         if (length) {
1169                 if (backwards) {
1170                         cursor_.pos() += length;
1171                         cursor_.setSelection(cursor_, -length);
1172                 } else
1173                         cursor_.setSelection(cursor_, length);
1174         }
1175 }
1176
1177
1178 LCursor & BufferView::cursor()
1179 {
1180         return cursor_;
1181 }
1182
1183
1184 LCursor const & BufferView::cursor() const
1185 {
1186         return cursor_;
1187 }
1188
1189
1190 pit_type BufferView::anchor_ref() const
1191 {
1192         return anchor_ref_;
1193 }
1194
1195
1196 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1197 {
1198         return metrics_info_;
1199 }
1200
1201
1202 void BufferView::updateMetrics(bool singlepar)
1203 {
1204         // FIXME (Abdel 19/10/2006):
1205         // There's something fishy in tabular. The coord_cache_ is not
1206         // correctly reconstructed when a character is trying to be inserted.
1207         // Not clearing out the coord_cache_ fixes the crash but there is a
1208         // bad side effect: buffer-begin and buffer-end do not update the screen.
1209         //
1210         // Remove old position cache
1211         coord_cache_.clear();
1212
1213         LyXText & buftext = buffer_->text();
1214         pit_type size = int(buftext.paragraphs().size());
1215
1216         if (anchor_ref_ > int(buftext.paragraphs().size() - 1)) {
1217                 anchor_ref_ = int(buftext.paragraphs().size() - 1);
1218                 offset_ref_ = 0;
1219         }
1220
1221         pit_type const pit = anchor_ref_;
1222         int pit1 = pit;
1223         int pit2 = pit;
1224         size_t const npit = buftext.paragraphs().size();
1225
1226         // Rebreak anchor paragraph. In Single Paragraph mode, rebreak only
1227         // the (main text, not inset!) paragraph containing the cursor.
1228         // (if this paragraph contains insets etc., rebreaking will
1229         // recursively descend)
1230         if (!singlepar || pit == cursor_.bottom().pit())
1231                 buftext.redoParagraph(*this, pit);
1232         int y0 = buftext.getPar(pit).ascent() - offset_ref_;
1233
1234         // Redo paragraphs above anchor if necessary; again, in Single Par
1235         // mode, only if we encounter the (main text) one having the cursor.
1236         int y1 = y0;
1237         while (y1 > 0 && pit1 > 0) {
1238                 y1 -= buftext.getPar(pit1).ascent();
1239                 --pit1;
1240                 if (!singlepar || pit1 == cursor_.bottom().pit())
1241                         buftext.redoParagraph(*this, pit1);
1242                 y1 -= buftext.getPar(pit1).descent();
1243         }
1244
1245
1246         // Take care of ascent of first line
1247         y1 -= buftext.getPar(pit1).ascent();
1248
1249         // Normalize anchor for next time
1250         anchor_ref_ = pit1;
1251         offset_ref_ = -y1;
1252
1253         // Grey at the beginning is ugly
1254         if (pit1 == 0 && y1 > 0) {
1255                 y0 -= y1;
1256                 y1 = 0;
1257                 anchor_ref_ = 0;
1258         }
1259
1260         // Redo paragraphs below the anchor if necessary. Single par mode:
1261         // only the one containing the cursor if encountered.
1262         int y2 = y0;
1263         while (y2 < height_ && pit2 < int(npit) - 1) {
1264                 y2 += buftext.getPar(pit2).descent();
1265                 ++pit2;
1266                 if (!singlepar || pit2 == cursor_.bottom().pit())
1267                         buftext.redoParagraph(*this, pit2);
1268                 y2 += buftext.getPar(pit2).ascent();
1269         }
1270
1271         // Take care of descent of last line
1272         y2 += buftext.getPar(pit2).descent();
1273
1274         // The coordinates of all these paragraphs are correct, cache them
1275         int y = y1;
1276         CoordCache::InnerParPosCache & parPos = coord_cache_.parPos()[&buftext];
1277         for (pit_type pit = pit1; pit <= pit2; ++pit) {
1278                 Paragraph const & par = buftext.getPar(pit);
1279                 y += par.ascent();
1280                 parPos[pit] = Point(0, y);
1281                 if (singlepar && pit == cursor_.bottom().pit()) {
1282                         // In Single Paragraph mode, collect here the
1283                         // y1 and y2 of the (one) paragraph the cursor is in
1284                         y1 = y - par.ascent();
1285                         y2 = y + par.descent();
1286                 }
1287                 y += par.descent();
1288         }
1289
1290         if (singlepar) {
1291                 // collect cursor paragraph iter bounds
1292                 pit1 = cursor_.bottom().pit();
1293                 pit2 = cursor_.bottom().pit();
1294         }
1295
1296         lyxerr[Debug::DEBUG]
1297                 << BOOST_CURRENT_FUNCTION
1298                 << " y1: " << y1
1299                 << " y2: " << y2
1300                 << " pit1: " << pit1
1301                 << " pit2: " << pit2
1302                 << " npit: " << npit
1303                 << " singlepar: " << singlepar
1304                 << "size: " << size
1305                 << endl;
1306
1307         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2, singlepar, size);
1308
1309         if (lyxerr.debugging(Debug::WORKAREA)) {
1310                 lyxerr[Debug::WORKAREA] << "BufferView::updateMetrics" << endl;
1311                 coord_cache_.dump();
1312         }
1313 }
1314
1315
1316 void BufferView::menuInsertLyXFile(string const & filenm)
1317 {
1318         BOOST_ASSERT(cursor_.inTexted());
1319         string filename = filenm;
1320
1321         if (filename.empty()) {
1322                 // Launch a file browser
1323                 // FIXME UNICODE
1324                 string initpath = lyxrc.document_path;
1325
1326                 if (buffer_) {
1327                         string const trypath = buffer_->filePath();
1328                         // If directory is writeable, use this as default.
1329                         if (isDirWriteable(trypath))
1330                                 initpath = trypath;
1331                 }
1332
1333                 // FIXME UNICODE
1334                 FileDialog fileDlg(_("Select LyX document to insert"),
1335                         LFUN_FILE_INSERT,
1336                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1337                         make_pair(_("Examples|#E#e"), from_utf8(addPath(package().system_support(), "examples"))));
1338
1339                 FileDialog::Result result =
1340                         fileDlg.open(from_utf8(initpath),
1341                                      FileFilterList(_("LyX Documents (*.lyx)")),
1342                                      docstring());
1343
1344                 if (result.first == FileDialog::Later)
1345                         return;
1346
1347                 // FIXME UNICODE
1348                 filename = to_utf8(result.second);
1349
1350                 // check selected filename
1351                 if (filename.empty()) {
1352                         // emit message signal.
1353                         message(_("Canceled."));
1354                         return;
1355                 }
1356         }
1357
1358         // Get absolute path of file and add ".lyx"
1359         // to the filename if necessary
1360         filename = fileSearch(string(), filename, "lyx");
1361
1362         docstring const disp_fn = makeDisplayPath(filename);
1363         // emit message signal.
1364         message(bformat(_("Inserting document %1$s..."), disp_fn));
1365
1366         docstring res;
1367         Buffer buf("", false);
1368         if (lyx::loadLyXFile(&buf, makeAbsPath(filename))) {
1369                 ErrorList & el = buffer_->errorList("Parse");
1370                 // Copy the inserted document error list into the current buffer one.
1371                 el = buf.errorList("Parse");
1372                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1373                                              buf.params().textclass, el);
1374                 res = _("Document %1$s inserted.");
1375         } else
1376                 res = _("Could not insert document %1$s");
1377
1378         // emit message signal.
1379         message(bformat(res, disp_fn));
1380         buffer_->errors("Parse");
1381         resize();
1382 }
1383
1384
1385 } // namespace lyx