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 "bufferview_funcs.h"
  24 #include "coordcache.h"
  25 #include "CutAndPaste.h"
  26 #include "debug.h"
  27 #include "dispatchresult.h"
  28 #include "errorlist.h"
  29 #include "factory.h"
  30 #include "FloatList.h"
  31 #include "funcrequest.h"
  32 #include "FuncStatus.h"
  33 #include "gettext.h"
  34 #include "intl.h"
  35 #include "insetiterator.h"
  36 #include "language.h"
  37 #include "LaTeXFeatures.h"
  38 #include "lyx_cb.h" // added for Dispatch functions
  39 #include "lyx_main.h"
  40 #include "lyxfind.h"
  41 #include "lyxfunc.h"
  42 #include "lyxlayout.h"
  43 #include "lyxtext.h"
  44 #include "lyxtextclass.h"
  45 #include "lyxrc.h"
  46 #include "session.h"
  47 #include "paragraph.h"
  48 #include "paragraph_funcs.h"
  49 #include "ParagraphParameters.h"
  50 #include "pariterator.h"
  51 #include "texrow.h"
  52 #include "toc.h"
  53 #include "undo.h"
  54 #include "vspace.h"
  55 #include "WordLangTuple.h"
  56 #include "metricsinfo.h"
  57
  58 #include "insets/insetbibtex.h"
  59 #include "insets/insetcommand.h" // ChangeRefs
  60 #include "insets/insetref.h"
  61 #include "insets/insettext.h"
  62
  63 #include "frontends/Alert.h"
  64 #include "frontends/FileDialog.h"
  65 #include "frontends/FontMetrics.h"
  66
  67 #include "graphics/Previews.h"
  68
  69 #include "support/convert.h"
  70 #include "support/filefilterlist.h"
  71 #include "support/filetools.h"
  72 #include "support/package.h"
  73 #include "support/types.h"
  74
  75 #include <boost/bind.hpp>
  76 #include <boost/current_function.hpp>
  77
  78 #include <functional>
  79 #include <vector>
  80
  81
  82 namespace lyx {
  83
  84 using support::addPath;
  85 using support::bformat;
  86 using support::FileFilterList;
  87 using support::FileName;
  88 using support::fileSearch;
  89 using support::isDirWriteable;
  90 using support::isFileReadable;
  91 using support::makeDisplayPath;
  92 using support::package;
  93
  94 using std::distance;
  95 using std::endl;
  96 using std::istringstream;
  97 using std::make_pair;
  98 using std::min;
  99 using std::max;
 100 using std::mem_fun_ref;
 101 using std::string;
 102 using std::vector;
 103
 104 namespace Alert = frontend::Alert;
 105
 106 namespace {
 107
 108 /// Return an inset of this class if it exists at the current cursor position
 109 template <class T>
 110 T * getInsetByCode(LCursor & cur, InsetBase::Code code)
 111 {
 112         T * inset = 0;
 113         DocIterator it = cur;
 114         if (it.nextInset() &&
 115             it.nextInset()->lyxCode() == code) {
 116                 inset = static_cast<T*>(it.nextInset());
 117         }
 118         return inset;
 119 }
 120
 121 } // anon namespace
 122
 123
 124 BufferView::BufferView()
 125         : width_(0), height_(0), buffer_(0), wh_(0),
 126           cursor_(*this),
 127           multiparsel_cache_(false), anchor_ref_(0), offset_ref_(0),
 128           intl_(new Intl), last_inset_(0)
 129 {
 130         xsel_cache_.set = false;
 131         intl_->initKeyMapper(lyxrc.use_kbmap);
 132 }
 133
 134
 135 BufferView::~BufferView()
 136 {
 137 }
 138
 139
 140 Buffer * BufferView::buffer() const
 141 {
 142         return buffer_;
 143 }
 144
 145
 146 void BufferView::setBuffer(Buffer * b)
 147 {
 148         lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 149                             << "[ b = " << b << "]" << endl;
 150
 151         if (buffer_) {
 152                 // Save the actual cursor position and anchor inside the
 153                 // buffer so that it can be restored in case we rechange
 154                 // to this buffer later on.
 155                 buffer_->saveCursor(cursor_.selectionBegin(),
 156                                     cursor_.selectionEnd());
 157                 // update bookmark pit of the current buffer before switch
 158                 for (size_t i = 0; i < LyX::ref().session().bookmarks().size(); ++i) {
 159                         BookmarksSection::Bookmark const & bm = LyX::ref().session().bookmarks().bookmark(i);
 160                         if (buffer()->fileName() != bm.filename.absFilename())
 161                                 continue;
 162                         // if par_id or pit has been changed, reset par_pit and par_id
 163                         // see http://bugzilla.lyx.org/show_bug.cgi?id=3092
 164                         pit_type new_pit;
 165                         int new_id;
 166                         boost::tie(new_pit, new_id) = moveToPosition(bm.par_pit, bm.par_id, bm.par_pos);
 167                         if (bm.par_pit != new_pit || bm.par_id != new_id)
 168                                 const_cast<BookmarksSection::Bookmark &>(bm).setPos(new_pit, new_id);
 169                 }
 170                 // current buffer is going to be switched-off, save cursor pos
 171                 LyX::ref().session().lastFilePos().save(FileName(buffer_->fileName()),
 172                         boost::tie(cursor_.pit(), cursor_.pos()) );
 173         }
 174
 175         // If we're quitting lyx, don't bother updating stuff
 176         if (quitting) {
 177                 buffer_ = 0;
 178                 return;
 179         }
 180
 181         // If we are closing current buffer, switch to the first in
 182         // buffer list.
 183         if (!b) {
 184                 lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 185                                     << " No Buffer!" << endl;
 186                 // We are closing the buffer, use the first buffer as current
 187                 buffer_ = theBufferList().first();
 188         } else {
 189                 // Set current buffer
 190                 buffer_ = b;
 191         }
 192
 193         // Reset old cursor
 194         cursor_ = LCursor(*this);
 195         anchor_ref_ = 0;
 196         offset_ref_ = 0;
 197
 198         if (buffer_) {
 199                 lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 200                                     << "Buffer addr: " << buffer_ << endl;
 201                 cursor_.push(buffer_->inset());
 202                 cursor_.resetAnchor();
 203                 buffer_->text().setCurrentFont(cursor_);
 204                 if (buffer_->getCursor().size() > 0 &&
 205                     buffer_->getAnchor().size() > 0)
 206                 {
 207                         cursor_.setCursor(buffer_->getAnchor().asDocIterator(&(buffer_->inset())));
 208                         cursor_.resetAnchor();
 209                         cursor_.setCursor(buffer_->getCursor().asDocIterator(&(buffer_->inset())));
 210                         cursor_.setSelection();
 211                         // do not set selection to the new buffer because we
 212                         // only paste recent selection.
 213                 }
 214         }
 215
 216         if (buffer_)
 217                 updateMetrics(false);
 218
 219         if (buffer_ && graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 220                 graphics::Previews::get().generateBufferPreviews(*buffer_);
 221 }
 222
 223
 224 bool BufferView::loadLyXFile(FileName const & filename, bool tolastfiles)
 225 {
 226         // File already open?
 227         if (theBufferList().exists(filename.absFilename())) {
 228                 docstring const file = makeDisplayPath(filename.absFilename(), 20);
 229                 docstring text = bformat(_("The document %1$s is already "
 230                                                      "loaded.\n\nDo you want to revert "
 231                                                      "to the saved version?"), file);
 232                 int const ret = Alert::prompt(_("Revert to saved document?"),
 233                         text, 0, 1,  _("&Revert"), _("&Switch to document"));
 234
 235                 if (ret != 0) {
 236                         setBuffer(theBufferList().getBuffer(filename.absFilename()));
 237                         return true;
 238                 }
 239                 // FIXME: should be LFUN_REVERT
 240                 if (!theBufferList().close(theBufferList().getBuffer(filename.absFilename()), false))
 241                         return false;
 242                 // Fall through to new load. (Asger)
 243                 buffer_ = 0;
 244         }
 245
 246         Buffer * b = 0;
 247
 248         if (isFileReadable(filename)) {
 249                 b = theBufferList().newBuffer(filename.absFilename());
 250                 if (!lyx::loadLyXFile(b, filename)) {
 251                         theBufferList().release(b);
 252                         return false;
 253                 }
 254         } else {
 255                 docstring text = bformat(_("The document %1$s does not yet "
 256                                                      "exist.\n\nDo you want to create "
 257                                                      "a new document?"), from_utf8(filename.absFilename()));
 258                 int const ret = Alert::prompt(_("Create new document?"),
 259                          text, 0, 1, _("&Create"), _("Cancel"));
 260
 261                 if (ret == 0) {
 262                         b = newFile(filename.absFilename(), string(), true);
 263                         if (!b)
 264                                 return false;
 265                 } else
 266                         return false;
 267         }
 268
 269         setBuffer(b);
 270         // Send the "errors" signal in case of parsing errors
 271         b->errors("Parse");
 272
 273         // Update the labels and section numbering.
 274         updateLabels(*buffer_);
 275         // scroll to the position when the file was last closed
 276         if (lyxrc.use_lastfilepos) {
 277                 pit_type pit;
 278                 pos_type pos;
 279                 boost::tie(pit, pos) = LyX::ref().session().lastFilePos().load(filename);
 280                 // if successfully move to pit (returned par_id is not zero), update metrics
 281                 if (moveToPosition(pit, 0, pos).get<1>()) {
 282                         if (fitCursor())
 283                                 updateMetrics(false);
 284                 }
 285         }
 286
 287         if (tolastfiles)
 288                 LyX::ref().session().lastFiles().add(FileName(b->fileName()));
 289
 290         return true;
 291 }
 292
 293
 294 void BufferView::resize()
 295 {
 296         if (!buffer_)
 297                 return;
 298
 299         lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION << endl;
 300
 301         updateMetrics(false);
 302         switchKeyMap();
 303 }
 304
 305
 306 bool BufferView::fitCursor()
 307 {
 308         if (bv_funcs::status(this, cursor_) == bv_funcs::CUR_INSIDE) {
 309                 frontend::FontMetrics const & fm =
 310                         theFontMetrics(cursor_.getFont());
 311                 int const asc = fm.maxAscent();
 312                 int const des = fm.maxDescent();
 313                 Point const p = bv_funcs::getPos(*this, cursor_, cursor_.boundary());
 314                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 315                         return false;
 316         }
 317         center();
 318         return true;
 319 }
 320
 321
 322 bool BufferView::multiParSel()
 323 {
 324         if (!cursor_.selection())
 325                 return false;
 326         bool ret = multiparsel_cache_;
 327         multiparsel_cache_ = cursor_.selBegin().pit() != cursor_.selEnd().pit();
 328         // Either this, or previous selection spans paragraphs
 329         return ret || multiparsel_cache_;
 330 }
 331
 332
 333 bool BufferView::update(Update::flags flags)
 334 {
 335         // last_inset_ points to the last visited inset. This pointer may become
 336         // invalid because of keyboard editing. Since all such operations
 337         // causes screen update(), I reset last_inset_ to avoid such a problem.
 338         last_inset_ = 0;
 339         // This is close to a hot-path.
 340         if (lyxerr.debugging(Debug::DEBUG)) {
 341                 lyxerr[Debug::DEBUG]
 342                         << BOOST_CURRENT_FUNCTION
 343                         << "[fitcursor = " << (flags & Update::FitCursor)
 344                         << ", forceupdate = " << (flags & Update::Force)
 345                         << ", singlepar = " << (flags & Update::SinglePar)
 346                         << "]  buffer: " << buffer_ << endl;
 347         }
 348
 349         // Check needed to survive LyX startup
 350         if (!buffer_)
 351                 return false;
 352
 353         if (lyxerr.debugging(Debug::WORKAREA)) {
 354                 lyxerr[Debug::WORKAREA] << "BufferView::update" << std::endl;
 355         }
 356
 357         // Update macro store
 358         buffer_->buildMacros();
 359
 360         // Now do the first drawing step if needed. This consists on updating
 361         // the CoordCache in updateMetrics().
 362         // The second drawing step is done in WorkArea::redraw() if needed.
 363
 364         // Case when no explicit update is requested.
 365         if (!flags) {
 366                 // no need to redraw anything.
 367                 metrics_info_.update_strategy = NoScreenUpdate;
 368                 return false;
 369         }
 370
 371         if (flags == Update::Decoration) {
 372                 metrics_info_.update_strategy = DecorationUpdate;
 373                 return true;
 374         }
 375
 376         if (flags == Update::FitCursor
 377                 || flags == (Update::Decoration | Update::FitCursor)) {
 378                 bool const fit_cursor = fitCursor();
 379                 // tell the frontend to update the screen if needed.
 380                 if (fit_cursor) {
 381                         updateMetrics(false);
 382                         return true;
 383                 }
 384                 if (flags & Update::Decoration) {
 385                         metrics_info_.update_strategy = DecorationUpdate;
 386                         return true;
 387                 }
 388                 // no screen update is needed.
 389                 metrics_info_.update_strategy = NoScreenUpdate;
 390                 return false;
 391         }
 392
 393         bool full_metrics = flags & Update::Force;
 394         if (flags & Update::MultiParSel)
 395                 full_metrics |= multiParSel();
 396
 397         bool const single_par = !full_metrics;
 398         updateMetrics(single_par);
 399
 400         if (flags & Update::FitCursor && fitCursor())
 401                 updateMetrics(false);
 402
 403         // tell the frontend to update the screen.
 404         return true;
 405 }
 406
 407
 408 void BufferView::updateScrollbar()
 409 {
 410         if (!buffer_) {
 411                 lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION
 412                                      << " no text in updateScrollbar" << endl;
 413                 scrollbarParameters_.reset();
 414                 return;
 415         }
 416
 417         LyXText & t = buffer_->text();
 418         TextMetrics & tm = text_metrics_[&t];
 419
 420         int const parsize = int(t.paragraphs().size() - 1);
 421         if (anchor_ref_ >  parsize)  {
 422                 anchor_ref_ = parsize;
 423                 offset_ref_ = 0;
 424         }
 425
 426         if (lyxerr.debugging(Debug::GUI)) {
 427                 lyxerr[Debug::GUI]
 428                         << BOOST_CURRENT_FUNCTION
 429                         << " Updating scrollbar: height: " << t.paragraphs().size()
 430                         << " curr par: " << cursor_.bottom().pit()
 431                         << " default height " << defaultRowHeight() << endl;
 432         }
 433
 434         // It would be better to fix the scrollbar to understand
 435         // values in [0..1] and divide everything by wh
 436
 437         // estimated average paragraph height:
 438         if (wh_ == 0)
 439                 wh_ = height_ / 4;
 440
 441         int h = tm.parMetrics(anchor_ref_).height();
 442
 443         // Normalize anchor/offset (MV):
 444         while (offset_ref_ > h && anchor_ref_ < parsize) {
 445                 anchor_ref_++;
 446                 offset_ref_ -= h;
 447                 h = tm.parMetrics(anchor_ref_).height();
 448         }
 449         // Look at paragraph heights on-screen
 450         int sumh = 0;
 451         int nh = 0;
 452         for (pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 453                 if (sumh > height_)
 454                         break;
 455                 int const h2 = tm.parMetrics(pit).height();
 456                 sumh += h2;
 457                 nh++;
 458         }
 459
 460         BOOST_ASSERT(nh);
 461         int const hav = sumh / nh;
 462         // More realistic average paragraph height
 463         if (hav > wh_)
 464                 wh_ = hav;
 465
 466         BOOST_ASSERT(h);
 467         scrollbarParameters_.height = (parsize + 1) * wh_;
 468         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 469         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 470 }
 471
 472
 473 ScrollbarParameters const & BufferView::scrollbarParameters() const
 474 {
 475         return scrollbarParameters_;
 476 }
 477
 478
 479 void BufferView::scrollDocView(int value)
 480 {
 481         lyxerr[Debug::GUI] << BOOST_CURRENT_FUNCTION
 482                            << "[ value = " << value << "]" << endl;
 483
 484         if (!buffer_)
 485                 return;
 486
 487         LyXText & t = buffer_->text();
 488         TextMetrics & tm = text_metrics_[&t];
 489
 490         float const bar = value / float(wh_ * t.paragraphs().size());
 491
 492         anchor_ref_ = int(bar * t.paragraphs().size());
 493         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 494                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 495
 496         tm.redoParagraph(anchor_ref_);
 497         int const h = tm.parMetrics(anchor_ref_).height();
 498         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 499         updateMetrics(false);
 500 }
 501
 502
 503 void BufferView::setCursorFromScrollbar()
 504 {
 505         if (!buffer_)
 506                 return;
 507
 508         LyXText & t = buffer_->text();
 509
 510         int const height = 2 * defaultRowHeight();
 511         int const first = height;
 512         int const last = height_ - height;
 513         LCursor & cur = cursor_;
 514
 515         bv_funcs::CurStatus st = bv_funcs::status(this, cur);
 516
 517         switch (st) {
 518         case bv_funcs::CUR_ABOVE:
 519                 // We reset the cursor because bv_funcs::status() does not
 520                 // work when the cursor is within mathed.
 521                 cur.reset(buffer_->inset());
 522                 t.setCursorFromCoordinates(cur, 0, first);
 523                 cur.clearSelection();
 524                 break;
 525         case bv_funcs::CUR_BELOW:
 526                 // We reset the cursor because bv_funcs::status() does not
 527                 // work when the cursor is within mathed.
 528                 cur.reset(buffer_->inset());
 529                 t.setCursorFromCoordinates(cur, 0, last);
 530                 cur.clearSelection();
 531                 break;
 532         case bv_funcs::CUR_INSIDE:
 533                 int const y = bv_funcs::getPos(*this, cur, cur.boundary()).y_;
 534                 int const newy = min(last, max(y, first));
 535                 if (y != newy) {
 536                         cur.reset(buffer_->inset());
 537                         t.setCursorFromCoordinates(cur, 0, newy);
 538                 }
 539         }
 540 }
 541
 542
 543 Change const BufferView::getCurrentChange() const
 544 {
 545         if (!cursor_.selection())
 546                 return Change(Change::UNCHANGED);
 547
 548         DocIterator dit = cursor_.selectionBegin();
 549         return dit.paragraph().lookupChange(dit.pos());
 550 }
 551
 552
 553 void BufferView::saveBookmark(bool persistent)
 554 {
 555         LyX::ref().session().bookmarks().save(
 556                 FileName(buffer_->fileName()),
 557                 cursor_.pit(),
 558                 cursor_.paragraph().id(),
 559                 cursor_.pos(),
 560                 persistent
 561         );
 562         if (persistent)
 563                 // emit message signal.
 564                 message(_("Save bookmark"));
 565 }
 566
 567
 568 boost::tuple<pit_type, int> BufferView::moveToPosition(pit_type par_pit, int par_id, pos_type par_pos)
 569 {
 570         cursor_.clearSelection();
 571
 572         // if a valid par_id is given, try it first
 573         if (par_id > 0) {
 574                 ParIterator par = buffer_->getParFromID(par_id);
 575                 if (par != buffer_->par_iterator_end()) {
 576                         setCursor(makeDocIterator(par, min(par->size(), par_pos)));
 577                         return boost::make_tuple(cursor_.pit(), par_id);
 578                 }
 579         }
 580         // if par_id == 0, or searching through par_id failed
 581         if (static_cast<size_t>(par_pit) < buffer_->paragraphs().size()) {
 582                 ParIterator it = buffer_->par_iterator_begin();
 583                 ParIterator const end = buffer_->par_iterator_end();
 584                 for (; it != end; ++it)
 585                         if (it.pit() == par_pit) {
 586                                 // restored pos may be bigger than it->size
 587                                 setCursor(makeDocIterator(it, min(par_pos, it->size())));
 588                                 return boost::make_tuple(par_pit, it->id());
 589                         }
 590         }
 591         // both methods fail
 592         return boost::make_tuple(pit_type(0), 0);
 593 }
 594
 595
 596 void BufferView::switchKeyMap()
 597 {
 598         if (!lyxrc.rtl_support)
 599                 return;
 600
 601         if (cursor_.innerText()->real_current_font.isRightToLeft()) {
 602                 if (intl_->keymap == Intl::PRIMARY)
 603                         intl_->keyMapSec();
 604         } else {
 605                 if (intl_->keymap == Intl::SECONDARY)
 606                         intl_->keyMapPrim();
 607         }
 608 }
 609
 610
 611 int BufferView::workWidth() const
 612 {
 613         return width_;
 614 }
 615
 616
 617 void BufferView::center()
 618 {
 619         CursorSlice & bot = cursor_.bottom();
 620         TextMetrics & tm = text_metrics_[bot.text()];
 621         pit_type const pit = bot.pit();
 622         tm.redoParagraph(pit);
 623         ParagraphMetrics const & pm = tm.parMetrics(pit);
 624         anchor_ref_ = pit;
 625         offset_ref_ = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary()).y_
 626                 + pm.ascent() - height_ / 2;
 627 }
 628
 629
 630 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 631 {
 632         FuncStatus flag;
 633
 634         switch (cmd.action) {
 635
 636         case LFUN_UNDO:
 637                 flag.enabled(!buffer_->undostack().empty());
 638                 break;
 639         case LFUN_REDO:
 640                 flag.enabled(!buffer_->redostack().empty());
 641                 break;
 642         case LFUN_FILE_INSERT:
 643         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 644         case LFUN_FILE_INSERT_PLAINTEXT:
 645         case LFUN_BOOKMARK_SAVE:
 646                 // FIXME: Actually, these LFUNS should be moved to LyXText
 647                 flag.enabled(cursor_.inTexted());
 648                 break;
 649         case LFUN_FONT_STATE:
 650         case LFUN_LABEL_INSERT:
 651         case LFUN_PARAGRAPH_GOTO:
 652         // FIXME handle non-trivially
 653         case LFUN_OUTLINE_UP:
 654         case LFUN_OUTLINE_DOWN:
 655         case LFUN_OUTLINE_IN:
 656         case LFUN_OUTLINE_OUT:
 657         case LFUN_NOTE_NEXT:
 658         case LFUN_REFERENCE_NEXT:
 659         case LFUN_WORD_FIND:
 660         case LFUN_WORD_REPLACE:
 661         case LFUN_MARK_OFF:
 662         case LFUN_MARK_ON:
 663         case LFUN_MARK_TOGGLE:
 664         case LFUN_SCREEN_RECENTER:
 665         case LFUN_BIBTEX_DATABASE_ADD:
 666         case LFUN_BIBTEX_DATABASE_DEL:
 667         case LFUN_WORDS_COUNT:
 668         case LFUN_NEXT_INSET_TOGGLE:
 669                 flag.enabled(true);
 670                 break;
 671
 672         case LFUN_LABEL_GOTO: {
 673                 flag.enabled(!cmd.argument().empty()
 674                     || getInsetByCode<InsetRef>(cursor_, InsetBase::REF_CODE));
 675                 break;
 676         }
 677
 678         case LFUN_CHANGES_TRACK:
 679                 flag.enabled(true);
 680                 flag.setOnOff(buffer_->params().trackChanges);
 681                 break;
 682
 683         case LFUN_CHANGES_OUTPUT: {
 684                 OutputParams runparams;
 685                 LaTeXFeatures features(*buffer_, buffer_->params(), runparams);
 686                 flag.enabled(buffer_ && features.isAvailable("dvipost"));
 687                 flag.setOnOff(buffer_->params().outputChanges);
 688                 break;
 689         }
 690
 691         case LFUN_CHANGES_MERGE:
 692         case LFUN_CHANGE_NEXT:
 693         case LFUN_ALL_CHANGES_ACCEPT:
 694         case LFUN_ALL_CHANGES_REJECT:
 695                 // TODO: context-sensitive enabling of LFUNs
 696                 // In principle, these command should only be enabled if there
 697                 // is a change in the document. However, without proper
 698                 // optimizations, this will inevitably result in poor performance.
 699                 flag.enabled(buffer_);
 700                 break;
 701
 702         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 703                 flag.setOnOff(buffer_->params().compressed);
 704                 break;
 705         }
 706
 707         default:
 708                 flag.enabled(false);
 709         }
 710
 711         return flag;
 712 }
 713
 714
 715 Update::flags BufferView::dispatch(FuncRequest const & cmd)
 716 {
 717         //lyxerr << BOOST_CURRENT_FUNCTION
 718         //       << [ cmd = " << cmd << "]" << endl;
 719
 720         // Make sure that the cached BufferView is correct.
 721         lyxerr[Debug::ACTION] << BOOST_CURRENT_FUNCTION
 722                 << " action[" << cmd.action << ']'
 723                 << " arg[" << to_utf8(cmd.argument()) << ']'
 724                 << " x[" << cmd.x << ']'
 725                 << " y[" << cmd.y << ']'
 726                 << " button[" << cmd.button() << ']'
 727                 << endl;
 728
 729         // FIXME: this should not be possible.
 730         if (!buffer_)
 731                 return Update::None;
 732
 733         LCursor & cur = cursor_;
 734         // Default Update flags.
 735         Update::flags updateFlags = Update::Force | Update::FitCursor;
 736
 737         switch (cmd.action) {
 738
 739         case LFUN_UNDO:
 740                 cur.message(_("Undo"));
 741                 cur.clearSelection();
 742                 if (!textUndo(*this)) {
 743                         cur.message(_("No further undo information"));
 744                         updateFlags = Update::None;
 745                 }
 746                 switchKeyMap();
 747                 break;
 748
 749         case LFUN_REDO:
 750                 cur.message(_("Redo"));
 751                 cur.clearSelection();
 752                 if (!textRedo(*this)) {
 753                         cur.message(_("No further redo information"));
 754                         updateFlags = Update::None;
 755                 }
 756                 switchKeyMap();
 757                 break;
 758
 759         case LFUN_FILE_INSERT:
 760                 // FIXME UNICODE
 761                 menuInsertLyXFile(to_utf8(cmd.argument()));
 762                 break;
 763
 764         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 765                 // FIXME UNICODE
 766                 insertPlaintextFile(this, to_utf8(cmd.argument()), true);
 767                 break;
 768
 769         case LFUN_FILE_INSERT_PLAINTEXT:
 770                 // FIXME UNICODE
 771                 insertPlaintextFile(this, to_utf8(cmd.argument()), false);
 772                 break;
 773
 774         case LFUN_FONT_STATE:
 775                 cur.message(cur.currentState());
 776                 break;
 777
 778         case LFUN_BOOKMARK_SAVE:
 779                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 780                 break;
 781
 782         case LFUN_LABEL_GOTO: {
 783                 docstring label = cmd.argument();
 784                 if (label.empty()) {
 785                         InsetRef * inset =
 786                                 getInsetByCode<InsetRef>(cursor_,
 787                                                          InsetBase::REF_CODE);
 788                         if (inset) {
 789                                 label = inset->getParam("reference");
 790                                 // persistent=false: use temp_bookmark
 791                                 saveBookmark(false);
 792                         }
 793                 }
 794
 795                 if (!label.empty())
 796                         gotoLabel(label);
 797                 break;
 798         }
 799
 800         case LFUN_PARAGRAPH_GOTO: {
 801                 int const id = convert<int>(to_utf8(cmd.argument()));
 802                 int i = 0;
 803                 for (Buffer * b = buffer_; i == 0 || b != buffer_; b = theBufferList().next(b)) {
 804                         ParIterator par = b->getParFromID(id);
 805                         if (par == b->par_iterator_end()) {
 806                                 lyxerr[Debug::INFO]
 807                                         << "No matching paragraph found! ["
 808                                         << id << "]." << endl;
 809                         } else {
 810                                 lyxerr[Debug::INFO]
 811                                         << "Paragraph " << par->id()
 812                                         << " found in buffer `"
 813                                         << b->fileName() << "'." << endl;
 814
 815                                 if (b == buffer_) {
 816                                         // Set the cursor
 817                                         setCursor(makeDocIterator(par, 0));
 818                                         switchKeyMap();
 819                                 } else {
 820                                         // Switch to other buffer view and resend cmd
 821                                         theLyXFunc().dispatch(FuncRequest(
 822                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 823                                         theLyXFunc().dispatch(cmd);
 824                                         updateFlags = Update::None;
 825                                 }
 826                                 break;
 827                         }
 828                         ++i;
 829                 }
 830                 break;
 831         }
 832
 833         case LFUN_OUTLINE_UP:
 834                 toc::outline(toc::Up, cursor_);
 835                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 836                 updateLabels(*buffer_);
 837                 break;
 838         case LFUN_OUTLINE_DOWN:
 839                 toc::outline(toc::Down, cursor_);
 840                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 841                 updateLabels(*buffer_);
 842                 break;
 843         case LFUN_OUTLINE_IN:
 844                 toc::outline(toc::In, cursor_);
 845                 updateLabels(*buffer_);
 846                 break;
 847         case LFUN_OUTLINE_OUT:
 848                 toc::outline(toc::Out, cursor_);
 849                 updateLabels(*buffer_);
 850                 break;
 851
 852         case LFUN_NOTE_NEXT:
 853                 bv_funcs::gotoInset(this, InsetBase::NOTE_CODE, false);
 854                 break;
 855
 856         case LFUN_REFERENCE_NEXT: {
 857                 vector<InsetBase_code> tmp;
 858                 tmp.push_back(InsetBase::LABEL_CODE);
 859                 tmp.push_back(InsetBase::REF_CODE);
 860                 bv_funcs::gotoInset(this, tmp, true);
 861                 break;
 862         }
 863
 864         case LFUN_CHANGES_TRACK:
 865                 buffer_->params().trackChanges = !buffer_->params().trackChanges;
 866                 break;
 867
 868         case LFUN_CHANGES_OUTPUT:
 869                 buffer_->params().outputChanges = !buffer_->params().outputChanges;
 870                 break;
 871
 872         case LFUN_CHANGE_NEXT:
 873                 findNextChange(this);
 874                 break;
 875
 876         case LFUN_CHANGES_MERGE:
 877                 if (findNextChange(this))
 878                         showDialog("changes");
 879                 break;
 880
 881         case LFUN_ALL_CHANGES_ACCEPT:
 882                 // select complete document
 883                 cursor_.reset(buffer_->inset());
 884                 cursor_.selHandle(true);
 885                 buffer_->text().cursorBottom(cursor_);
 886                 // accept everything in a single step to support atomic undo
 887                 buffer_->text().acceptOrRejectChanges(cursor_, LyXText::ACCEPT);
 888                 break;
 889
 890         case LFUN_ALL_CHANGES_REJECT:
 891                 // select complete document
 892                 cursor_.reset(buffer_->inset());
 893                 cursor_.selHandle(true);
 894                 buffer_->text().cursorBottom(cursor_);
 895                 // reject everything in a single step to support atomic undo
 896                 // Note: reject does not work recursively; the user may have to repeat the operation
 897                 buffer_->text().acceptOrRejectChanges(cursor_, LyXText::REJECT);
 898                 break;
 899
 900         case LFUN_WORD_FIND:
 901                 find(this, cmd);
 902                 break;
 903
 904         case LFUN_WORD_REPLACE:
 905                 replace(this, cmd);
 906                 break;
 907
 908         case LFUN_MARK_OFF:
 909                 cur.clearSelection();
 910                 cur.resetAnchor();
 911                 cur.message(from_utf8(N_("Mark off")));
 912                 break;
 913
 914         case LFUN_MARK_ON:
 915                 cur.clearSelection();
 916                 cur.mark() = true;
 917                 cur.resetAnchor();
 918                 cur.message(from_utf8(N_("Mark on")));
 919                 break;
 920
 921         case LFUN_MARK_TOGGLE:
 922                 cur.clearSelection();
 923                 if (cur.mark()) {
 924                         cur.mark() = false;
 925                         cur.message(from_utf8(N_("Mark removed")));
 926                 } else {
 927                         cur.mark() = true;
 928                         cur.message(from_utf8(N_("Mark set")));
 929                 }
 930                 cur.resetAnchor();
 931                 break;
 932
 933         case LFUN_SCREEN_RECENTER:
 934                 center();
 935                 break;
 936
 937         case LFUN_BIBTEX_DATABASE_ADD: {
 938                 LCursor tmpcur = cursor_;
 939                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 940                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 941                                                 InsetBase::BIBTEX_CODE);
 942                 if (inset) {
 943                         if (inset->addDatabase(to_utf8(cmd.argument())))
 944                                 buffer_->updateBibfilesCache();
 945                 }
 946                 break;
 947         }
 948
 949         case LFUN_BIBTEX_DATABASE_DEL: {
 950                 LCursor tmpcur = cursor_;
 951                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 952                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 953                                                 InsetBase::BIBTEX_CODE);
 954                 if (inset) {
 955                         if (inset->delDatabase(to_utf8(cmd.argument())))
 956                                 buffer_->updateBibfilesCache();
 957                 }
 958                 break;
 959         }
 960
 961         case LFUN_WORDS_COUNT: {
 962                 DocIterator from, to;
 963                 if (cur.selection()) {
 964                         from = cur.selectionBegin();
 965                         to = cur.selectionEnd();
 966                 } else {
 967                         from = doc_iterator_begin(buffer_->inset());
 968                         to = doc_iterator_end(buffer_->inset());
 969                 }
 970                 int const count = countWords(from, to);
 971                 docstring message;
 972                 if (count != 1) {
 973                         if (cur.selection())
 974                                 message = bformat(_("%1$d words in selection."),
 975                                           count);
 976                                 else
 977                                         message = bformat(_("%1$d words in document."),
 978                                                           count);
 979                 }
 980                 else {
 981                         if (cur.selection())
 982                                 message = _("One word in selection.");
 983                         else
 984                                 message = _("One word in document.");
 985                 }
 986
 987                 Alert::information(_("Count words"), message);
 988         }
 989                 break;
 990
 991         case LFUN_BUFFER_TOGGLE_COMPRESSION:
 992                 // turn compression on/off
 993                 buffer_->params().compressed = !buffer_->params().compressed;
 994                 break;
 995
 996         case LFUN_NEXT_INSET_TOGGLE: {
 997                 // this is the real function we want to invoke
 998                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
 999                 // if there is an inset at cursor, see whether it
1000                 // wants to toggle.
1001                 InsetBase * inset = cur.nextInset();
1002                 if (inset && inset->isActive()) {
1003                         LCursor tmpcur = cur;
1004                         tmpcur.pushLeft(*inset);
1005                         inset->dispatch(tmpcur, tmpcmd);
1006                         if (tmpcur.result().dispatched()) {
1007                                 cur.dispatched();
1008                         }
1009                 }
1010                 // if it did not work, try the underlying inset.
1011                 if (!cur.result().dispatched())
1012                         cur.dispatch(tmpcmd);
1013
1014                 if (cur.result().dispatched())
1015                         cur.clearSelection();
1016
1017                 break;
1018         }
1019
1020         default:
1021                 updateFlags = Update::None;
1022         }
1023
1024         return updateFlags;
1025 }
1026
1027
1028 docstring const BufferView::requestSelection()
1029 {
1030         if (!buffer_)
1031                 return docstring();
1032
1033         LCursor & cur = cursor_;
1034
1035         if (!cur.selection()) {
1036                 xsel_cache_.set = false;
1037                 return docstring();
1038         }
1039
1040         if (!xsel_cache_.set ||
1041             cur.top() != xsel_cache_.cursor ||
1042             cur.anchor_.top() != xsel_cache_.anchor)
1043         {
1044                 xsel_cache_.cursor = cur.top();
1045                 xsel_cache_.anchor = cur.anchor_.top();
1046                 xsel_cache_.set = cur.selection();
1047                 return cur.selectionAsString(false);
1048         }
1049         return docstring();
1050 }
1051
1052
1053 void BufferView::clearSelection()
1054 {
1055         if (buffer_) {
1056                 cursor_.clearSelection();
1057                 // Clear the selection buffer. Otherwise a subsequent
1058                 // middle-mouse-button paste would use the selection buffer,
1059                 // not the more current external selection.
1060                 cap::clearSelection();
1061                 xsel_cache_.set = false;
1062                 // The buffer did not really change, but this causes the
1063                 // redraw we need because we cleared the selection above.
1064                 buffer_->changed();
1065         }
1066 }
1067
1068
1069 void BufferView::workAreaResize(int width, int height)
1070 {
1071         // Update from work area
1072         width_ = width;
1073         height_ = height;
1074
1075         // The complete text metrics will be redone.
1076         text_metrics_.clear();
1077
1078         if (buffer_)
1079                 resize();
1080 }
1081
1082
1083 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
1084 {
1085         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1086
1087         // This is only called for mouse related events including
1088         // LFUN_FILE_OPEN generated by drag-and-drop.
1089         FuncRequest cmd = cmd0;
1090
1091         // E.g. Qt mouse press when no buffer
1092         if (!buffer_)
1093                 return false;
1094
1095         LCursor cur(*this);
1096         cur.push(buffer_->inset());
1097         cur.selection() = cursor_.selection();
1098
1099         // Either the inset under the cursor or the
1100         // surrounding LyXText will handle this event.
1101
1102         // Build temporary cursor.
1103         cmd.y = min(max(cmd.y, -1), height_);
1104         InsetBase * inset = buffer_->text().editXY(cur, cmd.x, cmd.y);
1105
1106         //lyxerr << BOOST_CURRENT_FUNCTION
1107         //       << " * hit inset at tip: " << inset << endl;
1108         //lyxerr << BOOST_CURRENT_FUNCTION
1109         //       << " * created temp cursor:" << cur << endl;
1110
1111         // NOTE: editXY returns the top level inset of nested insets. If you happen
1112         // to move from a text (inset=0) to a text inside an inset (e.g. an opened
1113         // footnote inset, again inset=0), that inset will not be redrawn.
1114         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1115                 bool need_redraw = false;
1116
1117                 if (inset != last_inset_) {
1118                         if (last_inset_)
1119                                 need_redraw |= last_inset_->setMouseHover(false);
1120                         if (inset)
1121                                 need_redraw |= inset->setMouseHover(true);
1122                         last_inset_ = inset;
1123                 }
1124
1125                 // if last metrics update was in singlepar mode, WorkArea::redraw() will
1126                 // not expose the button for redraw. We adjust here the metrics dimension
1127                 // to enable a full redraw.
1128                 // FIXME: It is possible to redraw only the area around the button!
1129                 if (need_redraw
1130                         && metrics_info_.update_strategy == SingleParUpdate) {
1131                         // FIXME: It should be possible to redraw only the area around
1132                         // the button by doing this:
1133                         //
1134                         //metrics_info_.singlepar = false;
1135                         //metrics_info_.y1 = ymin of button;
1136                         //metrics_info_.y2 = ymax of button;
1137                         //
1138                         // Unfortunately, rowpainter.C:paintText() does not distinguish
1139                         // between background updates and text updates. So we use the hammer
1140                         // solution for now. We could also avoid the updateMetrics() below
1141                         // by using the first and last pit of the CoordCache. Have a look
1142                         // at LyXText::getPitNearY() to see what I mean.
1143                         //
1144                         //metrics_info_.pit1 = first pit of CoordCache;
1145                         //metrics_info_.pit2 = last pit of CoordCache;
1146                         //metrics_info_.singlepar = false;
1147                         //metrics_info_.y1 = 0;
1148                         //metrics_info_.y2 = height_;
1149                         //
1150                         updateMetrics(false);
1151                 }
1152
1153                 // This event (moving without mouse click) is not passed further.
1154                 // This should be changed if it is further utilized.
1155                 return need_redraw;
1156         }
1157
1158         // Put anchor at the same position.
1159         cur.resetAnchor();
1160
1161         // Try to dispatch to an non-editable inset near this position
1162         // via the temp cursor. If the inset wishes to change the real
1163         // cursor it has to do so explicitly by using
1164         //  cur.bv().cursor() = cur;  (or similar)
1165         if (inset) {
1166                 inset->dispatch(cur, cmd);
1167         }
1168
1169         // Now dispatch to the temporary cursor. If the real cursor should
1170         // be modified, the inset's dispatch has to do so explicitly.
1171         if (!cur.result().dispatched())
1172                 cur.dispatch(cmd);
1173
1174         // Redraw if requested and necessary.
1175         if (cur.result().dispatched() && cur.result().update())
1176                 return update(cur.result().update());
1177
1178         return false;
1179 }
1180
1181
1182 void BufferView::scroll(int /*lines*/)
1183 {
1184 //      if (!buffer_)
1185 //              return;
1186 //
1187 //      LyXText const * t = &buffer_->text();
1188 //      int const line_height = defaultRowHeight();
1189 //
1190 //      // The new absolute coordinate
1191 //      int new_top_y = top_y() + lines * line_height;
1192 //
1193 //      // Restrict to a valid value
1194 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
1195 //      new_top_y = std::max(0, new_top_y);
1196 //
1197 //      scrollDocView(new_top_y);
1198 //
1199 }
1200
1201
1202 void BufferView::setCursorFromRow(int row)
1203 {
1204         int tmpid = -1;
1205         int tmppos = -1;
1206
1207         buffer_->texrow().getIdFromRow(row, tmpid, tmppos);
1208
1209         if (tmpid == -1)
1210                 buffer_->text().setCursor(cursor_, 0, 0);
1211         else
1212                 buffer_->text().setCursor(cursor_, buffer_->getParFromID(tmpid).pit(), tmppos);
1213 }
1214
1215
1216 void BufferView::gotoLabel(docstring const & label)
1217 {
1218         for (InsetIterator it = inset_iterator_begin(buffer_->inset()); it; ++it) {
1219                 vector<docstring> labels;
1220                 it->getLabelList(*buffer_, labels);
1221                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1222                         setCursor(it);
1223                         update();
1224                         return;
1225                 }
1226         }
1227 }
1228
1229
1230 TextMetrics const & BufferView::textMetrics(LyXText const * t) const
1231 {
1232         return const_cast<BufferView *>(this)->textMetrics(t);
1233 }
1234
1235
1236 TextMetrics & BufferView::textMetrics(LyXText const * t)
1237 {
1238         TextMetricsCache::iterator tmc_it  = text_metrics_.find(t);
1239         if (tmc_it == text_metrics_.end()) {
1240                 tmc_it = text_metrics_.insert(
1241                         make_pair(t, TextMetrics(this, const_cast<LyXText *>(t)))).first;
1242         }
1243         return tmc_it->second;
1244 }
1245
1246
1247 ParagraphMetrics const & BufferView::parMetrics(LyXText const * t,
1248                 pit_type pit) const
1249 {
1250         return textMetrics(t).parMetrics(pit);
1251 }
1252
1253
1254 int BufferView::workHeight() const
1255 {
1256         return height_;
1257 }
1258
1259
1260 void BufferView::setCursor(DocIterator const & dit)
1261 {
1262         size_t const n = dit.depth();
1263         for (size_t i = 0; i < n; ++i)
1264                 dit[i].inset().edit(cursor_, true);
1265
1266         cursor_.setCursor(dit);
1267         cursor_.selection() = false;
1268 }
1269
1270
1271 bool BufferView::checkDepm(LCursor & cur, LCursor & old)
1272 {
1273         // Would be wrong to delete anything if we have a selection.
1274         if (cur.selection())
1275                 return false;
1276
1277         bool need_anchor_change = false;
1278         bool changed = cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1279                 need_anchor_change);
1280
1281         if (need_anchor_change)
1282                 cur.resetAnchor();
1283
1284         if (!changed)
1285                 return false;
1286
1287         updateLabels(*buffer_);
1288
1289         updateMetrics(false);
1290         buffer_->changed();
1291         return true;
1292 }
1293
1294
1295 bool BufferView::mouseSetCursor(LCursor & cur)
1296 {
1297         BOOST_ASSERT(&cur.bv() == this);
1298
1299         // Has the cursor just left the inset?
1300         bool badcursor = false;
1301         if (&cursor_.inset() != &cur.inset())
1302                 badcursor = cursor_.inset().notifyCursorLeaves(cursor_);
1303
1304         // do the dEPM magic if needed
1305         // FIXME: move this to InsetText::notifyCursorLeaves?
1306         bool update = false;
1307         if (!badcursor && cursor_.inTexted())
1308                 checkDepm(cur, cursor_);
1309
1310         // if the cursor was in an empty script inset and the new
1311         // position is in the nucleus of the inset, notifyCursorLeaves
1312         // will kill the script inset itself. So we check all the
1313         // elements of the cursor to make sure that they are correct.
1314         // For an example, see bug 2933:
1315         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1316         // The code below could maybe be moved to a DocIterator method.
1317         //lyxerr << "cur before " << cur <<std::endl;
1318         DocIterator dit(cur.inset());
1319         dit.push_back(cur.bottom());
1320         size_t i = 1;
1321         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1322                 dit.push_back(cur[i]);
1323                 ++i;
1324         }
1325         //lyxerr << "5 cur after" << dit <<std::endl;
1326
1327         cursor_.setCursor(dit);
1328         cursor_.clearSelection();
1329         finishUndo();
1330         return update;
1331 }
1332
1333
1334 void BufferView::putSelectionAt(DocIterator const & cur,
1335                                 int length, bool backwards)
1336 {
1337         cursor_.clearSelection();
1338
1339         setCursor(cur);
1340
1341         if (length) {
1342                 if (backwards) {
1343                         cursor_.pos() += length;
1344                         cursor_.setSelection(cursor_, -length);
1345                 } else
1346                         cursor_.setSelection(cursor_, length);
1347                 cap::saveSelection(cursor_);
1348         }
1349 }
1350
1351
1352 LCursor & BufferView::cursor()
1353 {
1354         return cursor_;
1355 }
1356
1357
1358 LCursor const & BufferView::cursor() const
1359 {
1360         return cursor_;
1361 }
1362
1363
1364 pit_type BufferView::anchor_ref() const
1365 {
1366         return anchor_ref_;
1367 }
1368
1369
1370 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1371 {
1372         return metrics_info_;
1373 }
1374
1375
1376 // FIXME: We should split-up updateMetrics() for the singlepar case.
1377 void BufferView::updateMetrics(bool singlepar)
1378 {
1379         LyXText & buftext = buffer_->text();
1380         TextMetrics & tm = textMetrics(&buftext);
1381         pit_type size = int(buftext.paragraphs().size());
1382
1383         if (anchor_ref_ > int(buftext.paragraphs().size() - 1)) {
1384                 anchor_ref_ = int(buftext.paragraphs().size() - 1);
1385                 offset_ref_ = 0;
1386         }
1387
1388         // If the paragraph metrics has changed, we can not
1389         // use the singlepar optimisation.
1390         if (singlepar
1391                 // In Single Paragraph mode, rebreak only
1392                 // the (main text, not inset!) paragraph containing the cursor.
1393                 // (if this paragraph contains insets etc., rebreaking will
1394                 // recursively descend)
1395                 && tm.redoParagraph(cursor_.bottom().pit()))
1396                 singlepar = false;
1397
1398         pit_type const pit = anchor_ref_;
1399         int pit1 = pit;
1400         int pit2 = pit;
1401         size_t const npit = buftext.paragraphs().size();
1402
1403         // Rebreak anchor paragraph.
1404         if (!singlepar)
1405                 tm.redoParagraph(pit);
1406
1407         // Clear out the position cache in case of full screen redraw.
1408         if (!singlepar)
1409                 coord_cache_.clear();
1410
1411         int y0 = tm.parMetrics(pit).ascent() - offset_ref_;
1412
1413         // Redo paragraphs above anchor if necessary.
1414         int y1 = y0;
1415         while (y1 > 0 && pit1 > 0) {
1416                 y1 -= tm.parMetrics(pit1).ascent();
1417                 --pit1;
1418                 if (!singlepar)
1419                         tm.redoParagraph(pit1);
1420                 y1 -= tm.parMetrics(pit1).descent();
1421         }
1422
1423
1424         // Take care of ascent of first line
1425         y1 -= tm.parMetrics(pit1).ascent();
1426
1427         // Normalize anchor for next time
1428         anchor_ref_ = pit1;
1429         offset_ref_ = -y1;
1430
1431         // Grey at the beginning is ugly
1432         if (pit1 == 0 && y1 > 0) {
1433                 y0 -= y1;
1434                 y1 = 0;
1435                 anchor_ref_ = 0;
1436         }
1437
1438         // Redo paragraphs below the anchor if necessary.
1439         int y2 = y0;
1440         while (y2 < height_ && pit2 < int(npit) - 1) {
1441                 y2 += tm.parMetrics(pit2).descent();
1442                 ++pit2;
1443                 if (!singlepar)
1444                         tm.redoParagraph(pit2);
1445                 y2 += tm.parMetrics(pit2).ascent();
1446         }
1447
1448         // Take care of descent of last line
1449         y2 += tm.parMetrics(pit2).descent();
1450
1451         // The coordinates of all these paragraphs are correct, cache them
1452         int y = y1;
1453         CoordCache::InnerParPosCache & parPos = coord_cache_.parPos()[&buftext];
1454         for (pit_type pit = pit1; pit <= pit2; ++pit) {
1455                 ParagraphMetrics const & pm = tm.parMetrics(pit);
1456                 y += pm.ascent();
1457                 parPos[pit] = Point(0, y);
1458                 if (singlepar && pit == cursor_.bottom().pit()) {
1459                         // In Single Paragraph mode, collect here the
1460                         // y1 and y2 of the (one) paragraph the cursor is in
1461                         y1 = y - pm.ascent();
1462                         y2 = y + pm.descent();
1463                 }
1464                 y += pm.descent();
1465         }
1466
1467         if (singlepar) {
1468                 // collect cursor paragraph iter bounds
1469                 pit1 = cursor_.bottom().pit();
1470                 pit2 = cursor_.bottom().pit();
1471         }
1472
1473         lyxerr[Debug::DEBUG]
1474                 << BOOST_CURRENT_FUNCTION
1475                 << " y1: " << y1
1476                 << " y2: " << y2
1477                 << " pit1: " << pit1
1478                 << " pit2: " << pit2
1479                 << " npit: " << npit
1480                 << " singlepar: " << singlepar
1481                 << "size: " << size
1482                 << endl;
1483
1484         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2,
1485                 singlepar? SingleParUpdate: FullScreenUpdate, size);
1486
1487         if (lyxerr.debugging(Debug::WORKAREA)) {
1488                 lyxerr[Debug::WORKAREA] << "BufferView::updateMetrics" << endl;
1489                 coord_cache_.dump();
1490         }
1491 }
1492
1493
1494 void BufferView::menuInsertLyXFile(string const & filenm)
1495 {
1496         BOOST_ASSERT(cursor_.inTexted());
1497         string filename = filenm;
1498
1499         if (filename.empty()) {
1500                 // Launch a file browser
1501                 // FIXME UNICODE
1502                 string initpath = lyxrc.document_path;
1503
1504                 if (buffer_) {
1505                         string const trypath = buffer_->filePath();
1506                         // If directory is writeable, use this as default.
1507                         if (isDirWriteable(FileName(trypath)))
1508                                 initpath = trypath;
1509                 }
1510
1511                 // FIXME UNICODE
1512                 FileDialog fileDlg(_("Select LyX document to insert"),
1513                         LFUN_FILE_INSERT,
1514                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1515                         make_pair(_("Examples|#E#e"), from_utf8(addPath(package().system_support(), "examples"))));
1516
1517                 FileDialog::Result result =
1518                         fileDlg.open(from_utf8(initpath),
1519                                      FileFilterList(_("LyX Documents (*.lyx)")),
1520                                      docstring());
1521
1522                 if (result.first == FileDialog::Later)
1523                         return;
1524
1525                 // FIXME UNICODE
1526                 filename = to_utf8(result.second);
1527
1528                 // check selected filename
1529                 if (filename.empty()) {
1530                         // emit message signal.
1531                         message(_("Canceled."));
1532                         return;
1533                 }
1534         }
1535
1536         // Get absolute path of file and add ".lyx"
1537         // to the filename if necessary
1538         filename = fileSearch(string(), filename, "lyx").absFilename();
1539
1540         docstring const disp_fn = makeDisplayPath(filename);
1541         // emit message signal.
1542         message(bformat(_("Inserting document %1$s..."), disp_fn));
1543
1544         docstring res;
1545         Buffer buf("", false);
1546         if (lyx::loadLyXFile(&buf, FileName(filename))) {
1547                 ErrorList & el = buffer_->errorList("Parse");
1548                 // Copy the inserted document error list into the current buffer one.
1549                 el = buf.errorList("Parse");
1550                 recordUndo(cursor_);
1551                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1552                                              buf.params().textclass, el);
1553                 res = _("Document %1$s inserted.");
1554         } else
1555                 res = _("Could not insert document %1$s");
1556
1557         // emit message signal.
1558         message(bformat(res, disp_fn));
1559         buffer_->errors("Parse");
1560         resize();
1561 }
1562
1563 } // namespace lyx