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