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                 flag.enabled(buffer_ && LaTeXFeatures::isAvailable("dvipost"));
 685                 flag.setOnOff(buffer_->params().outputChanges);
 686                 break;
 687
 688         case LFUN_CHANGES_MERGE:
 689         case LFUN_CHANGE_NEXT:
 690         case LFUN_ALL_CHANGES_ACCEPT:
 691         case LFUN_ALL_CHANGES_REJECT:
 692                 // TODO: context-sensitive enabling of LFUNs
 693                 // In principle, these command should only be enabled if there
 694                 // is a change in the document. However, without proper
 695                 // optimizations, this will inevitably result in poor performance.
 696                 flag.enabled(buffer_);
 697                 break;
 698
 699         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 700                 flag.setOnOff(buffer_->params().compressed);
 701                 break;
 702         }
 703
 704         default:
 705                 flag.enabled(false);
 706         }
 707
 708         return flag;
 709 }
 710
 711
 712 Update::flags BufferView::dispatch(FuncRequest const & cmd)
 713 {
 714         //lyxerr << BOOST_CURRENT_FUNCTION
 715         //       << [ cmd = " << cmd << "]" << endl;
 716
 717         // Make sure that the cached BufferView is correct.
 718         lyxerr[Debug::ACTION] << BOOST_CURRENT_FUNCTION
 719                 << " action[" << cmd.action << ']'
 720                 << " arg[" << to_utf8(cmd.argument()) << ']'
 721                 << " x[" << cmd.x << ']'
 722                 << " y[" << cmd.y << ']'
 723                 << " button[" << cmd.button() << ']'
 724                 << endl;
 725
 726         // FIXME: this should not be possible.
 727         if (!buffer_)
 728                 return Update::None;
 729
 730         LCursor & cur = cursor_;
 731         // Default Update flags.
 732         Update::flags updateFlags = Update::Force | Update::FitCursor;
 733
 734         switch (cmd.action) {
 735
 736         case LFUN_UNDO:
 737                 cur.message(_("Undo"));
 738                 cur.clearSelection();
 739                 if (!textUndo(*this)) {
 740                         cur.message(_("No further undo information"));
 741                         updateFlags = Update::None;
 742                 }
 743                 switchKeyMap();
 744                 break;
 745
 746         case LFUN_REDO:
 747                 cur.message(_("Redo"));
 748                 cur.clearSelection();
 749                 if (!textRedo(*this)) {
 750                         cur.message(_("No further redo information"));
 751                         updateFlags = Update::None;
 752                 }
 753                 switchKeyMap();
 754                 break;
 755
 756         case LFUN_FILE_INSERT:
 757                 // FIXME UNICODE
 758                 menuInsertLyXFile(to_utf8(cmd.argument()));
 759                 break;
 760
 761         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 762                 // FIXME UNICODE
 763                 insertPlaintextFile(this, to_utf8(cmd.argument()), true);
 764                 break;
 765
 766         case LFUN_FILE_INSERT_PLAINTEXT:
 767                 // FIXME UNICODE
 768                 insertPlaintextFile(this, to_utf8(cmd.argument()), false);
 769                 break;
 770
 771         case LFUN_FONT_STATE:
 772                 cur.message(cur.currentState());
 773                 break;
 774
 775         case LFUN_BOOKMARK_SAVE:
 776                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 777                 break;
 778
 779         case LFUN_LABEL_GOTO: {
 780                 docstring label = cmd.argument();
 781                 if (label.empty()) {
 782                         InsetRef * inset =
 783                                 getInsetByCode<InsetRef>(cursor_,
 784                                                          InsetBase::REF_CODE);
 785                         if (inset) {
 786                                 label = inset->getParam("reference");
 787                                 // persistent=false: use temp_bookmark
 788                                 saveBookmark(false);
 789                         }
 790                 }
 791
 792                 if (!label.empty())
 793                         gotoLabel(label);
 794                 break;
 795         }
 796
 797         case LFUN_PARAGRAPH_GOTO: {
 798                 int const id = convert<int>(to_utf8(cmd.argument()));
 799                 int i = 0;
 800                 for (Buffer * b = buffer_; i == 0 || b != buffer_; b = theBufferList().next(b)) {
 801                         ParIterator par = b->getParFromID(id);
 802                         if (par == b->par_iterator_end()) {
 803                                 lyxerr[Debug::INFO]
 804                                         << "No matching paragraph found! ["
 805                                         << id << "]." << endl;
 806                         } else {
 807                                 lyxerr[Debug::INFO]
 808                                         << "Paragraph " << par->id()
 809                                         << " found in buffer `"
 810                                         << b->fileName() << "'." << endl;
 811
 812                                 if (b == buffer_) {
 813                                         // Set the cursor
 814                                         setCursor(makeDocIterator(par, 0));
 815                                         switchKeyMap();
 816                                 } else {
 817                                         // Switch to other buffer view and resend cmd
 818                                         theLyXFunc().dispatch(FuncRequest(
 819                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 820                                         theLyXFunc().dispatch(cmd);
 821                                         updateFlags = Update::None;
 822                                 }
 823                                 break;
 824                         }
 825                         ++i;
 826                 }
 827                 break;
 828         }
 829
 830         case LFUN_OUTLINE_UP:
 831                 toc::outline(toc::Up, cursor_);
 832                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 833                 updateLabels(*buffer_);
 834                 break;
 835         case LFUN_OUTLINE_DOWN:
 836                 toc::outline(toc::Down, cursor_);
 837                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 838                 updateLabels(*buffer_);
 839                 break;
 840         case LFUN_OUTLINE_IN:
 841                 toc::outline(toc::In, cursor_);
 842                 updateLabels(*buffer_);
 843                 break;
 844         case LFUN_OUTLINE_OUT:
 845                 toc::outline(toc::Out, cursor_);
 846                 updateLabels(*buffer_);
 847                 break;
 848
 849         case LFUN_NOTE_NEXT:
 850                 bv_funcs::gotoInset(this, InsetBase::NOTE_CODE, false);
 851                 break;
 852
 853         case LFUN_REFERENCE_NEXT: {
 854                 vector<InsetBase_code> tmp;
 855                 tmp.push_back(InsetBase::LABEL_CODE);
 856                 tmp.push_back(InsetBase::REF_CODE);
 857                 bv_funcs::gotoInset(this, tmp, true);
 858                 break;
 859         }
 860
 861         case LFUN_CHANGES_TRACK:
 862                 buffer_->params().trackChanges = !buffer_->params().trackChanges;
 863                 break;
 864
 865         case LFUN_CHANGES_OUTPUT:
 866                 buffer_->params().outputChanges = !buffer_->params().outputChanges;
 867                 break;
 868
 869         case LFUN_CHANGE_NEXT:
 870                 findNextChange(this);
 871                 break;
 872
 873         case LFUN_CHANGES_MERGE:
 874                 if (findNextChange(this))
 875                         showDialog("changes");
 876                 break;
 877
 878         case LFUN_ALL_CHANGES_ACCEPT:
 879                 // select complete document
 880                 cursor_.reset(buffer_->inset());
 881                 cursor_.selHandle(true);
 882                 buffer_->text().cursorBottom(cursor_);
 883                 // accept everything in a single step to support atomic undo
 884                 buffer_->text().acceptOrRejectChanges(cursor_, LyXText::ACCEPT);
 885                 break;
 886
 887         case LFUN_ALL_CHANGES_REJECT:
 888                 // select complete document
 889                 cursor_.reset(buffer_->inset());
 890                 cursor_.selHandle(true);
 891                 buffer_->text().cursorBottom(cursor_);
 892                 // reject everything in a single step to support atomic undo
 893                 // Note: reject does not work recursively; the user may have to repeat the operation
 894                 buffer_->text().acceptOrRejectChanges(cursor_, LyXText::REJECT);
 895                 break;
 896
 897         case LFUN_WORD_FIND:
 898                 find(this, cmd);
 899                 break;
 900
 901         case LFUN_WORD_REPLACE:
 902                 replace(this, cmd);
 903                 break;
 904
 905         case LFUN_MARK_OFF:
 906                 cur.clearSelection();
 907                 cur.resetAnchor();
 908                 cur.message(from_utf8(N_("Mark off")));
 909                 break;
 910
 911         case LFUN_MARK_ON:
 912                 cur.clearSelection();
 913                 cur.mark() = true;
 914                 cur.resetAnchor();
 915                 cur.message(from_utf8(N_("Mark on")));
 916                 break;
 917
 918         case LFUN_MARK_TOGGLE:
 919                 cur.clearSelection();
 920                 if (cur.mark()) {
 921                         cur.mark() = false;
 922                         cur.message(from_utf8(N_("Mark removed")));
 923                 } else {
 924                         cur.mark() = true;
 925                         cur.message(from_utf8(N_("Mark set")));
 926                 }
 927                 cur.resetAnchor();
 928                 break;
 929
 930         case LFUN_SCREEN_RECENTER:
 931                 center();
 932                 break;
 933
 934         case LFUN_BIBTEX_DATABASE_ADD: {
 935                 LCursor tmpcur = cursor_;
 936                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 937                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 938                                                 InsetBase::BIBTEX_CODE);
 939                 if (inset) {
 940                         if (inset->addDatabase(to_utf8(cmd.argument())))
 941                                 buffer_->updateBibfilesCache();
 942                 }
 943                 break;
 944         }
 945
 946         case LFUN_BIBTEX_DATABASE_DEL: {
 947                 LCursor tmpcur = cursor_;
 948                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 949                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 950                                                 InsetBase::BIBTEX_CODE);
 951                 if (inset) {
 952                         if (inset->delDatabase(to_utf8(cmd.argument())))
 953                                 buffer_->updateBibfilesCache();
 954                 }
 955                 break;
 956         }
 957
 958         case LFUN_WORDS_COUNT: {
 959                 DocIterator from, to;
 960                 if (cur.selection()) {
 961                         from = cur.selectionBegin();
 962                         to = cur.selectionEnd();
 963                 } else {
 964                         from = doc_iterator_begin(buffer_->inset());
 965                         to = doc_iterator_end(buffer_->inset());
 966                 }
 967                 int const count = countWords(from, to);
 968                 docstring message;
 969                 if (count != 1) {
 970                         if (cur.selection())
 971                                 message = bformat(_("%1$d words in selection."),
 972                                           count);
 973                                 else
 974                                         message = bformat(_("%1$d words in document."),
 975                                                           count);
 976                 }
 977                 else {
 978                         if (cur.selection())
 979                                 message = _("One word in selection.");
 980                         else
 981                                 message = _("One word in document.");
 982                 }
 983
 984                 Alert::information(_("Count words"), message);
 985         }
 986                 break;
 987
 988         case LFUN_BUFFER_TOGGLE_COMPRESSION:
 989                 // turn compression on/off
 990                 buffer_->params().compressed = !buffer_->params().compressed;
 991                 break;
 992
 993         case LFUN_NEXT_INSET_TOGGLE: {
 994                 // this is the real function we want to invoke
 995                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
 996                 // if there is an inset at cursor, see whether it
 997                 // wants to toggle.
 998                 InsetBase * inset = cur.nextInset();
 999                 if (inset && inset->isActive()) {
1000                         LCursor tmpcur = cur;
1001                         tmpcur.pushLeft(*inset);
1002                         inset->dispatch(tmpcur, tmpcmd);
1003                         if (tmpcur.result().dispatched()) {
1004                                 cur.dispatched();
1005                         }
1006                 }
1007                 // if it did not work, try the underlying inset.
1008                 if (!cur.result().dispatched())
1009                         cur.dispatch(tmpcmd);
1010
1011                 if (cur.result().dispatched())
1012                         cur.clearSelection();
1013
1014                 break;
1015         }
1016
1017         default:
1018                 updateFlags = Update::None;
1019         }
1020
1021         return updateFlags;
1022 }
1023
1024
1025 docstring const BufferView::requestSelection()
1026 {
1027         if (!buffer_)
1028                 return docstring();
1029
1030         LCursor & cur = cursor_;
1031
1032         if (!cur.selection()) {
1033                 xsel_cache_.set = false;
1034                 return docstring();
1035         }
1036
1037         if (!xsel_cache_.set ||
1038             cur.top() != xsel_cache_.cursor ||
1039             cur.anchor_.top() != xsel_cache_.anchor)
1040         {
1041                 xsel_cache_.cursor = cur.top();
1042                 xsel_cache_.anchor = cur.anchor_.top();
1043                 xsel_cache_.set = cur.selection();
1044                 return cur.selectionAsString(false);
1045         }
1046         return docstring();
1047 }
1048
1049
1050 void BufferView::clearSelection()
1051 {
1052         if (buffer_) {
1053                 cursor_.clearSelection();
1054                 // Clear the selection buffer. Otherwise a subsequent
1055                 // middle-mouse-button paste would use the selection buffer,
1056                 // not the more current external selection.
1057                 cap::clearSelection();
1058                 xsel_cache_.set = false;
1059                 // The buffer did not really change, but this causes the
1060                 // redraw we need because we cleared the selection above.
1061                 buffer_->changed();
1062         }
1063 }
1064
1065
1066 void BufferView::workAreaResize(int width, int height)
1067 {
1068         // Update from work area
1069         width_ = width;
1070         height_ = height;
1071
1072         // The complete text metrics will be redone.
1073         text_metrics_.clear();
1074
1075         if (buffer_)
1076                 resize();
1077 }
1078
1079
1080 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
1081 {
1082         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1083
1084         // This is only called for mouse related events including
1085         // LFUN_FILE_OPEN generated by drag-and-drop.
1086         FuncRequest cmd = cmd0;
1087
1088         // E.g. Qt mouse press when no buffer
1089         if (!buffer_)
1090                 return false;
1091
1092         LCursor cur(*this);
1093         cur.push(buffer_->inset());
1094         cur.selection() = cursor_.selection();
1095
1096         // Either the inset under the cursor or the
1097         // surrounding LyXText will handle this event.
1098
1099         // Build temporary cursor.
1100         cmd.y = min(max(cmd.y, -1), height_);
1101         InsetBase * inset = buffer_->text().editXY(cur, cmd.x, cmd.y);
1102
1103         //lyxerr << BOOST_CURRENT_FUNCTION
1104         //       << " * hit inset at tip: " << inset << endl;
1105         //lyxerr << BOOST_CURRENT_FUNCTION
1106         //       << " * created temp cursor:" << cur << endl;
1107
1108         // NOTE: editXY returns the top level inset of nested insets. If you happen
1109         // to move from a text (inset=0) to a text inside an inset (e.g. an opened
1110         // footnote inset, again inset=0), that inset will not be redrawn.
1111         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1112                 bool need_redraw = false;
1113
1114                 if (inset != last_inset_) {
1115                         if (last_inset_)
1116                                 need_redraw |= last_inset_->setMouseHover(false);
1117                         if (inset)
1118                                 need_redraw |= inset->setMouseHover(true);
1119                         last_inset_ = inset;
1120                 }
1121
1122                 // if last metrics update was in singlepar mode, WorkArea::redraw() will
1123                 // not expose the button for redraw. We adjust here the metrics dimension
1124                 // to enable a full redraw.
1125                 // FIXME: It is possible to redraw only the area around the button!
1126                 if (need_redraw
1127                         && metrics_info_.update_strategy == SingleParUpdate) {
1128                         // FIXME: It should be possible to redraw only the area around
1129                         // the button by doing this:
1130                         //
1131                         //metrics_info_.singlepar = false;
1132                         //metrics_info_.y1 = ymin of button;
1133                         //metrics_info_.y2 = ymax of button;
1134                         //
1135                         // Unfortunately, rowpainter.C:paintText() does not distinguish
1136                         // between background updates and text updates. So we use the hammer
1137                         // solution for now. We could also avoid the updateMetrics() below
1138                         // by using the first and last pit of the CoordCache. Have a look
1139                         // at LyXText::getPitNearY() to see what I mean.
1140                         //
1141                         //metrics_info_.pit1 = first pit of CoordCache;
1142                         //metrics_info_.pit2 = last pit of CoordCache;
1143                         //metrics_info_.singlepar = false;
1144                         //metrics_info_.y1 = 0;
1145                         //metrics_info_.y2 = height_;
1146                         //
1147                         updateMetrics(false);
1148                 }
1149
1150                 // This event (moving without mouse click) is not passed further.
1151                 // This should be changed if it is further utilized.
1152                 return need_redraw;
1153         }
1154
1155         // Put anchor at the same position.
1156         cur.resetAnchor();
1157
1158         // Try to dispatch to an non-editable inset near this position
1159         // via the temp cursor. If the inset wishes to change the real
1160         // cursor it has to do so explicitly by using
1161         //  cur.bv().cursor() = cur;  (or similar)
1162         if (inset) {
1163                 inset->dispatch(cur, cmd);
1164         }
1165
1166         // Now dispatch to the temporary cursor. If the real cursor should
1167         // be modified, the inset's dispatch has to do so explicitly.
1168         if (!cur.result().dispatched())
1169                 cur.dispatch(cmd);
1170
1171         // Redraw if requested and necessary.
1172         if (cur.result().dispatched() && cur.result().update())
1173                 return update(cur.result().update());
1174
1175         return false;
1176 }
1177
1178
1179 void BufferView::scroll(int /*lines*/)
1180 {
1181 //      if (!buffer_)
1182 //              return;
1183 //
1184 //      LyXText const * t = &buffer_->text();
1185 //      int const line_height = defaultRowHeight();
1186 //
1187 //      // The new absolute coordinate
1188 //      int new_top_y = top_y() + lines * line_height;
1189 //
1190 //      // Restrict to a valid value
1191 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
1192 //      new_top_y = std::max(0, new_top_y);
1193 //
1194 //      scrollDocView(new_top_y);
1195 //
1196 }
1197
1198
1199 void BufferView::setCursorFromRow(int row)
1200 {
1201         int tmpid = -1;
1202         int tmppos = -1;
1203
1204         buffer_->texrow().getIdFromRow(row, tmpid, tmppos);
1205
1206         if (tmpid == -1)
1207                 buffer_->text().setCursor(cursor_, 0, 0);
1208         else
1209                 buffer_->text().setCursor(cursor_, buffer_->getParFromID(tmpid).pit(), tmppos);
1210 }
1211
1212
1213 void BufferView::gotoLabel(docstring const & label)
1214 {
1215         for (InsetIterator it = inset_iterator_begin(buffer_->inset()); it; ++it) {
1216                 vector<docstring> labels;
1217                 it->getLabelList(*buffer_, labels);
1218                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1219                         setCursor(it);
1220                         update();
1221                         return;
1222                 }
1223         }
1224 }
1225
1226
1227 TextMetrics const & BufferView::textMetrics(LyXText const * t) const
1228 {
1229         return const_cast<BufferView *>(this)->textMetrics(t);
1230 }
1231
1232
1233 TextMetrics & BufferView::textMetrics(LyXText const * t)
1234 {
1235         TextMetricsCache::iterator tmc_it  = text_metrics_.find(t);
1236         if (tmc_it == text_metrics_.end()) {
1237                 tmc_it = text_metrics_.insert(
1238                         make_pair(t, TextMetrics(this, const_cast<LyXText *>(t)))).first;
1239         }
1240         return tmc_it->second;
1241 }
1242
1243
1244 ParagraphMetrics const & BufferView::parMetrics(LyXText const * t,
1245                 pit_type pit) const
1246 {
1247         return textMetrics(t).parMetrics(pit);
1248 }
1249
1250
1251 int BufferView::workHeight() const
1252 {
1253         return height_;
1254 }
1255
1256
1257 void BufferView::setCursor(DocIterator const & dit)
1258 {
1259         size_t const n = dit.depth();
1260         for (size_t i = 0; i < n; ++i)
1261                 dit[i].inset().edit(cursor_, true);
1262
1263         cursor_.setCursor(dit);
1264         cursor_.selection() = false;
1265 }
1266
1267
1268 bool BufferView::checkDepm(LCursor & cur, LCursor & old)
1269 {
1270         // Would be wrong to delete anything if we have a selection.
1271         if (cur.selection())
1272                 return false;
1273
1274         bool need_anchor_change = false;
1275         bool changed = cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1276                 need_anchor_change);
1277
1278         if (need_anchor_change)
1279                 cur.resetAnchor();
1280
1281         if (!changed)
1282                 return false;
1283
1284         updateLabels(*buffer_);
1285
1286         updateMetrics(false);
1287         buffer_->changed();
1288         return true;
1289 }
1290
1291
1292 bool BufferView::mouseSetCursor(LCursor & cur)
1293 {
1294         BOOST_ASSERT(&cur.bv() == this);
1295
1296         // Has the cursor just left the inset?
1297         bool badcursor = false;
1298         if (&cursor_.inset() != &cur.inset())
1299                 badcursor = cursor_.inset().notifyCursorLeaves(cursor_);
1300
1301         // do the dEPM magic if needed
1302         // FIXME: move this to InsetText::notifyCursorLeaves?
1303         bool update = false;
1304         if (!badcursor && cursor_.inTexted())
1305                 checkDepm(cur, cursor_);
1306
1307         // if the cursor was in an empty script inset and the new
1308         // position is in the nucleus of the inset, notifyCursorLeaves
1309         // will kill the script inset itself. So we check all the
1310         // elements of the cursor to make sure that they are correct.
1311         // For an example, see bug 2933:
1312         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1313         // The code below could maybe be moved to a DocIterator method.
1314         //lyxerr << "cur before " << cur <<std::endl;
1315         DocIterator dit(cur.inset());
1316         dit.push_back(cur.bottom());
1317         size_t i = 1;
1318         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1319                 dit.push_back(cur[i]);
1320                 ++i;
1321         }
1322         //lyxerr << "5 cur after" << dit <<std::endl;
1323
1324         cursor_.setCursor(dit);
1325         cursor_.clearSelection();
1326         finishUndo();
1327         return update;
1328 }
1329
1330
1331 void BufferView::putSelectionAt(DocIterator const & cur,
1332                                 int length, bool backwards)
1333 {
1334         cursor_.clearSelection();
1335
1336         setCursor(cur);
1337
1338         if (length) {
1339                 if (backwards) {
1340                         cursor_.pos() += length;
1341                         cursor_.setSelection(cursor_, -length);
1342                 } else
1343                         cursor_.setSelection(cursor_, length);
1344                 cap::saveSelection(cursor_);
1345         }
1346 }
1347
1348
1349 LCursor & BufferView::cursor()
1350 {
1351         return cursor_;
1352 }
1353
1354
1355 LCursor const & BufferView::cursor() const
1356 {
1357         return cursor_;
1358 }
1359
1360
1361 pit_type BufferView::anchor_ref() const
1362 {
1363         return anchor_ref_;
1364 }
1365
1366
1367 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1368 {
1369         return metrics_info_;
1370 }
1371
1372
1373 // FIXME: We should split-up updateMetrics() for the singlepar case.
1374 void BufferView::updateMetrics(bool singlepar)
1375 {
1376         LyXText & buftext = buffer_->text();
1377         TextMetrics & tm = textMetrics(&buftext);
1378         pit_type size = int(buftext.paragraphs().size());
1379
1380         if (anchor_ref_ > int(buftext.paragraphs().size() - 1)) {
1381                 anchor_ref_ = int(buftext.paragraphs().size() - 1);
1382                 offset_ref_ = 0;
1383         }
1384
1385         // If the paragraph metrics has changed, we can not
1386         // use the singlepar optimisation.
1387         if (singlepar
1388                 // In Single Paragraph mode, rebreak only
1389                 // the (main text, not inset!) paragraph containing the cursor.
1390                 // (if this paragraph contains insets etc., rebreaking will
1391                 // recursively descend)
1392                 && tm.redoParagraph(cursor_.bottom().pit()))
1393                 singlepar = false;
1394
1395         pit_type const pit = anchor_ref_;
1396         int pit1 = pit;
1397         int pit2 = pit;
1398         size_t const npit = buftext.paragraphs().size();
1399
1400         // Rebreak anchor paragraph.
1401         if (!singlepar)
1402                 tm.redoParagraph(pit);
1403
1404         // Clear out the position cache in case of full screen redraw.
1405         if (!singlepar)
1406                 coord_cache_.clear();
1407
1408         int y0 = tm.parMetrics(pit).ascent() - offset_ref_;
1409
1410         // Redo paragraphs above anchor if necessary.
1411         int y1 = y0;
1412         while (y1 > 0 && pit1 > 0) {
1413                 y1 -= tm.parMetrics(pit1).ascent();
1414                 --pit1;
1415                 if (!singlepar)
1416                         tm.redoParagraph(pit1);
1417                 y1 -= tm.parMetrics(pit1).descent();
1418         }
1419
1420
1421         // Take care of ascent of first line
1422         y1 -= tm.parMetrics(pit1).ascent();
1423
1424         // Normalize anchor for next time
1425         anchor_ref_ = pit1;
1426         offset_ref_ = -y1;
1427
1428         // Grey at the beginning is ugly
1429         if (pit1 == 0 && y1 > 0) {
1430                 y0 -= y1;
1431                 y1 = 0;
1432                 anchor_ref_ = 0;
1433         }
1434
1435         // Redo paragraphs below the anchor if necessary.
1436         int y2 = y0;
1437         while (y2 < height_ && pit2 < int(npit) - 1) {
1438                 y2 += tm.parMetrics(pit2).descent();
1439                 ++pit2;
1440                 if (!singlepar)
1441                         tm.redoParagraph(pit2);
1442                 y2 += tm.parMetrics(pit2).ascent();
1443         }
1444
1445         // Take care of descent of last line
1446         y2 += tm.parMetrics(pit2).descent();
1447
1448         // The coordinates of all these paragraphs are correct, cache them
1449         int y = y1;
1450         CoordCache::InnerParPosCache & parPos = coord_cache_.parPos()[&buftext];
1451         for (pit_type pit = pit1; pit <= pit2; ++pit) {
1452                 ParagraphMetrics const & pm = tm.parMetrics(pit);
1453                 y += pm.ascent();
1454                 parPos[pit] = Point(0, y);
1455                 if (singlepar && pit == cursor_.bottom().pit()) {
1456                         // In Single Paragraph mode, collect here the
1457                         // y1 and y2 of the (one) paragraph the cursor is in
1458                         y1 = y - pm.ascent();
1459                         y2 = y + pm.descent();
1460                 }
1461                 y += pm.descent();
1462         }
1463
1464         if (singlepar) {
1465                 // collect cursor paragraph iter bounds
1466                 pit1 = cursor_.bottom().pit();
1467                 pit2 = cursor_.bottom().pit();
1468         }
1469
1470         lyxerr[Debug::DEBUG]
1471                 << BOOST_CURRENT_FUNCTION
1472                 << " y1: " << y1
1473                 << " y2: " << y2
1474                 << " pit1: " << pit1
1475                 << " pit2: " << pit2
1476                 << " npit: " << npit
1477                 << " singlepar: " << singlepar
1478                 << "size: " << size
1479                 << endl;
1480
1481         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2,
1482                 singlepar? SingleParUpdate: FullScreenUpdate, size);
1483
1484         if (lyxerr.debugging(Debug::WORKAREA)) {
1485                 lyxerr[Debug::WORKAREA] << "BufferView::updateMetrics" << endl;
1486                 coord_cache_.dump();
1487         }
1488 }
1489
1490
1491 void BufferView::menuInsertLyXFile(string const & filenm)
1492 {
1493         BOOST_ASSERT(cursor_.inTexted());
1494         string filename = filenm;
1495
1496         if (filename.empty()) {
1497                 // Launch a file browser
1498                 // FIXME UNICODE
1499                 string initpath = lyxrc.document_path;
1500
1501                 if (buffer_) {
1502                         string const trypath = buffer_->filePath();
1503                         // If directory is writeable, use this as default.
1504                         if (isDirWriteable(FileName(trypath)))
1505                                 initpath = trypath;
1506                 }
1507
1508                 // FIXME UNICODE
1509                 FileDialog fileDlg(_("Select LyX document to insert"),
1510                         LFUN_FILE_INSERT,
1511                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1512                         make_pair(_("Examples|#E#e"), from_utf8(addPath(package().system_support(), "examples"))));
1513
1514                 FileDialog::Result result =
1515                         fileDlg.open(from_utf8(initpath),
1516                                      FileFilterList(_("LyX Documents (*.lyx)")),
1517                                      docstring());
1518
1519                 if (result.first == FileDialog::Later)
1520                         return;
1521
1522                 // FIXME UNICODE
1523                 filename = to_utf8(result.second);
1524
1525                 // check selected filename
1526                 if (filename.empty()) {
1527                         // emit message signal.
1528                         message(_("Canceled."));
1529                         return;
1530                 }
1531         }
1532
1533         // Get absolute path of file and add ".lyx"
1534         // to the filename if necessary
1535         filename = fileSearch(string(), filename, "lyx").absFilename();
1536
1537         docstring const disp_fn = makeDisplayPath(filename);
1538         // emit message signal.
1539         message(bformat(_("Inserting document %1$s..."), disp_fn));
1540
1541         docstring res;
1542         Buffer buf("", false);
1543         if (lyx::loadLyXFile(&buf, FileName(filename))) {
1544                 ErrorList & el = buffer_->errorList("Parse");
1545                 // Copy the inserted document error list into the current buffer one.
1546                 el = buf.errorList("Parse");
1547                 recordUndo(cursor_);
1548                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1549                                              buf.params().textclass, el);
1550                 res = _("Document %1$s inserted.");
1551         } else
1552                 res = _("Could not insert document %1$s");
1553
1554         // emit message signal.
1555         message(bformat(res, disp_fn));
1556         buffer_->errors("Parse");
1557         resize();
1558 }
1559
1560 } // namespace lyx