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                 // Ideally, the whole cursor stack should be saved, but session
 172                 // currently can only handle bottom (whole document) level pit and pos.
 173                 // That is to say, if a cursor is in a nested inset, it will be
 174                 // restore to the left of the top level inset.
 175                 LyX::ref().session().lastFilePos().save(FileName(buffer_->fileName()),
 176                         boost::tie(cursor_.bottom().pit(), cursor_.bottom().pos()) );
 177         }
 178
 179         // If we're quitting lyx, don't bother updating stuff
 180         if (quitting) {
 181                 buffer_ = 0;
 182                 return;
 183         }
 184
 185         // If we are closing current buffer, switch to the first in
 186         // buffer list.
 187         if (!b) {
 188                 LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
 189                                     << " No Buffer!" << endl;
 190                 // We are closing the buffer, use the first buffer as current
 191                 buffer_ = theBufferList().first();
 192         } else {
 193                 // Set current buffer
 194                 buffer_ = b;
 195         }
 196
 197         // Reset old cursor
 198         cursor_ = LCursor(*this);
 199         anchor_ref_ = 0;
 200         offset_ref_ = 0;
 201
 202         if (buffer_) {
 203                 LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
 204                                     << "Buffer addr: " << buffer_ << endl;
 205                 cursor_.push(buffer_->inset());
 206                 cursor_.resetAnchor();
 207                 buffer_->text().setCurrentFont(cursor_);
 208                 if (buffer_->getCursor().size() > 0 &&
 209                     buffer_->getAnchor().size() > 0)
 210                 {
 211                         cursor_.setCursor(buffer_->getAnchor().asDocIterator(&(buffer_->inset())));
 212                         cursor_.resetAnchor();
 213                         cursor_.setCursor(buffer_->getCursor().asDocIterator(&(buffer_->inset())));
 214                         cursor_.setSelection();
 215                         // do not set selection to the new buffer because we
 216                         // only paste recent selection.
 217                 }
 218         }
 219
 220         if (buffer_)
 221                 updateMetrics(false);
 222
 223         if (buffer_ && graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 224                 graphics::Previews::get().generateBufferPreviews(*buffer_);
 225 }
 226
 227
 228 bool BufferView::loadLyXFile(FileName const & filename, bool tolastfiles)
 229 {
 230         // File already open?
 231         if (theBufferList().exists(filename.absFilename())) {
 232                 docstring const file = makeDisplayPath(filename.absFilename(), 20);
 233                 docstring text = bformat(_("The document %1$s is already "
 234                                                      "loaded.\n\nDo you want to revert "
 235                                                      "to the saved version?"), file);
 236                 int const ret = Alert::prompt(_("Revert to saved document?"),
 237                         text, 0, 1,  _("&Revert"), _("&Switch to document"));
 238
 239                 if (ret != 0) {
 240                         setBuffer(theBufferList().getBuffer(filename.absFilename()));
 241                         return true;
 242                 }
 243                 // FIXME: should be LFUN_REVERT
 244                 if (!theBufferList().close(theBufferList().getBuffer(filename.absFilename()), false))
 245                         return false;
 246                 // Fall through to new load. (Asger)
 247                 buffer_ = 0;
 248         }
 249
 250         Buffer * b = 0;
 251
 252         if (isFileReadable(filename)) {
 253                 b = theBufferList().newBuffer(filename.absFilename());
 254                 if (!lyx::loadLyXFile(b, filename)) {
 255                         theBufferList().release(b);
 256                         return false;
 257                 }
 258         } else {
 259                 docstring text = bformat(_("The document %1$s does not yet "
 260                                                      "exist.\n\nDo you want to create "
 261                                                      "a new document?"), from_utf8(filename.absFilename()));
 262                 int const ret = Alert::prompt(_("Create new document?"),
 263                          text, 0, 1, _("&Create"), _("Cancel"));
 264
 265                 if (ret == 0) {
 266                         b = newFile(filename.absFilename(), string(), true);
 267                         if (!b)
 268                                 return false;
 269                 } else
 270                         return false;
 271         }
 272
 273         setBuffer(b);
 274         // Send the "errors" signal in case of parsing errors
 275         b->errors("Parse");
 276
 277         // Update the labels and section numbering.
 278         updateLabels(*buffer_);
 279         // scroll to the position when the file was last closed
 280         if (lyxrc.use_lastfilepos) {
 281                 pit_type pit;
 282                 pos_type pos;
 283                 boost::tie(pit, pos) = LyX::ref().session().lastFilePos().load(filename);
 284                 // if successfully move to pit (returned par_id is not zero), update metrics and reset font
 285                 if (moveToPosition(pit, 0, pos).get<1>()) {
 286                         if (fitCursor())
 287                                 updateMetrics(false);
 288                         buffer_->text().setCurrentFont(cursor_);
 289                 }
 290         }
 291
 292         if (tolastfiles)
 293                 LyX::ref().session().lastFiles().add(FileName(b->fileName()));
 294
 295         return true;
 296 }
 297
 298
 299 void BufferView::resize()
 300 {
 301         if (!buffer_)
 302                 return;
 303
 304         LYXERR(Debug::DEBUG) << BOOST_CURRENT_FUNCTION << endl;
 305
 306         updateMetrics(false);
 307         switchKeyMap();
 308 }
 309
 310
 311 bool BufferView::fitCursor()
 312 {
 313         if (bv_funcs::status(this, cursor_) == bv_funcs::CUR_INSIDE) {
 314                 frontend::FontMetrics const & fm =
 315                         theFontMetrics(cursor_.getFont());
 316                 int const asc = fm.maxAscent();
 317                 int const des = fm.maxDescent();
 318                 Point const p = bv_funcs::getPos(*this, cursor_, cursor_.boundary());
 319                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 320                         return false;
 321         }
 322         center();
 323         return true;
 324 }
 325
 326
 327 bool BufferView::multiParSel()
 328 {
 329         if (!cursor_.selection())
 330                 return false;
 331         bool ret = multiparsel_cache_;
 332         multiparsel_cache_ = cursor_.selBegin().pit() != cursor_.selEnd().pit();
 333         // Either this, or previous selection spans paragraphs
 334         return ret || multiparsel_cache_;
 335 }
 336
 337
 338 bool BufferView::update(Update::flags flags)
 339 {
 340         // last_inset_ points to the last visited inset. This pointer may become
 341         // invalid because of keyboard editing. Since all such operations
 342         // causes screen update(), I reset last_inset_ to avoid such a problem.
 343         last_inset_ = 0;
 344         // This is close to a hot-path.
 345         LYXERR(Debug::DEBUG)
 346                 << BOOST_CURRENT_FUNCTION
 347                 << "[fitcursor = " << (flags & Update::FitCursor)
 348                 << ", forceupdate = " << (flags & Update::Force)
 349                 << ", singlepar = " << (flags & Update::SinglePar)
 350                 << "]  buffer: " << buffer_ << endl;
 351
 352         // Check needed to survive LyX startup
 353         if (!buffer_)
 354                 return false;
 355
 356         LYXERR(Debug::WORKAREA) << "BufferView::update" << std::endl;
 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         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         // It would be better to fix the scrollbar to understand
 434         // values in [0..1] and divide everything by wh
 435
 436         // estimated average paragraph height:
 437         if (wh_ == 0)
 438                 wh_ = height_ / 4;
 439
 440         int h = tm.parMetrics(anchor_ref_).height();
 441
 442         // Normalize anchor/offset (MV):
 443         while (offset_ref_ > h && anchor_ref_ < parsize) {
 444                 anchor_ref_++;
 445                 offset_ref_ -= h;
 446                 h = tm.parMetrics(anchor_ref_).height();
 447         }
 448         // Look at paragraph heights on-screen
 449         int sumh = 0;
 450         int nh = 0;
 451         for (pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 452                 if (sumh > height_)
 453                         break;
 454                 int const h2 = tm.parMetrics(pit).height();
 455                 sumh += h2;
 456                 nh++;
 457         }
 458
 459         BOOST_ASSERT(nh);
 460         int const hav = sumh / nh;
 461         // More realistic average paragraph height
 462         if (hav > wh_)
 463                 wh_ = hav;
 464
 465         BOOST_ASSERT(h);
 466         scrollbarParameters_.height = (parsize + 1) * wh_;
 467         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 468         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 469 }
 470
 471
 472 ScrollbarParameters const & BufferView::scrollbarParameters() const
 473 {
 474         return scrollbarParameters_;
 475 }
 476
 477
 478 void BufferView::scrollDocView(int value)
 479 {
 480         LYXERR(Debug::GUI) << BOOST_CURRENT_FUNCTION
 481                            << "[ value = " << value << "]" << endl;
 482
 483         if (!buffer_)
 484                 return;
 485
 486         LyXText & t = buffer_->text();
 487         TextMetrics & tm = text_metrics_[&t];
 488
 489         float const bar = value / float(wh_ * t.paragraphs().size());
 490
 491         anchor_ref_ = int(bar * t.paragraphs().size());
 492         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 493                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 494
 495         tm.redoParagraph(anchor_ref_);
 496         int const h = tm.parMetrics(anchor_ref_).height();
 497         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 498         updateMetrics(false);
 499 }
 500
 501
 502 void BufferView::setCursorFromScrollbar()
 503 {
 504         if (!buffer_)
 505                 return;
 506
 507         LyXText & t = buffer_->text();
 508
 509         int const height = 2 * defaultRowHeight();
 510         int const first = height;
 511         int const last = height_ - height;
 512         LCursor & cur = cursor_;
 513
 514         bv_funcs::CurStatus st = bv_funcs::status(this, cur);
 515
 516         switch (st) {
 517         case bv_funcs::CUR_ABOVE:
 518                 // We reset the cursor because bv_funcs::status() does not
 519                 // work when the cursor is within mathed.
 520                 cur.reset(buffer_->inset());
 521                 t.setCursorFromCoordinates(cur, 0, first);
 522                 cur.clearSelection();
 523                 break;
 524         case bv_funcs::CUR_BELOW:
 525                 // We reset the cursor because bv_funcs::status() does not
 526                 // work when the cursor is within mathed.
 527                 cur.reset(buffer_->inset());
 528                 t.setCursorFromCoordinates(cur, 0, last);
 529                 cur.clearSelection();
 530                 break;
 531         case bv_funcs::CUR_INSIDE:
 532                 int const y = bv_funcs::getPos(*this, cur, cur.boundary()).y_;
 533                 int const newy = min(last, max(y, first));
 534                 if (y != newy) {
 535                         cur.reset(buffer_->inset());
 536                         t.setCursorFromCoordinates(cur, 0, newy);
 537                 }
 538         }
 539 }
 540
 541
 542 Change const BufferView::getCurrentChange() const
 543 {
 544         if (!cursor_.selection())
 545                 return Change(Change::UNCHANGED);
 546
 547         DocIterator dit = cursor_.selectionBegin();
 548         return dit.paragraph().lookupChange(dit.pos());
 549 }
 550
 551
 552 void BufferView::saveBookmark(unsigned int idx)
 553 {
 554         LyX::ref().session().bookmarks().save(
 555                 FileName(buffer_->fileName()),
 556                 cursor_.pit(),
 557                 cursor_.paragraph().id(),
 558                 cursor_.pos(),
 559                 idx
 560         );
 561         if (idx)
 562                 // emit message signal.
 563                 message(_("Save bookmark"));
 564 }
 565
 566
 567 boost::tuple<pit_type, int> BufferView::moveToPosition(pit_type par_pit, int par_id, pos_type par_pos)
 568 {
 569         cursor_.clearSelection();
 570
 571         // if a valid par_id is given, try it first
 572         if (par_id > 0) {
 573                 ParIterator par = buffer_->getParFromID(par_id);
 574                 if (par != buffer_->par_iterator_end()) {
 575                         setCursor(makeDocIterator(par, min(par->size(), par_pos)));
 576                         return boost::make_tuple(cursor_.pit(), par_id);
 577                 }
 578         }
 579         // if par_id == 0, or searching through par_id failed
 580         if (static_cast<size_t>(par_pit) < buffer_->paragraphs().size()) {
 581                 ParIterator it = buffer_->par_iterator_begin();
 582                 ParIterator const end = buffer_->par_iterator_end();
 583                 for (; it != end; ++it)
 584                         if (it.pit() == par_pit) {
 585                                 // restored pos may be bigger than it->size
 586                                 setCursor(makeDocIterator(it, min(par_pos, it->size())));
 587                                 return boost::make_tuple(par_pit, it->id());
 588                         }
 589         }
 590         // both methods fail
 591         return boost::make_tuple(pit_type(0), 0);
 592 }
 593
 594
 595 void BufferView::switchKeyMap()
 596 {
 597         if (!lyxrc.rtl_support)
 598                 return;
 599
 600         if (cursor_.innerText()->real_current_font.isRightToLeft()) {
 601                 if (intl_->keymap == Intl::PRIMARY)
 602                         intl_->keyMapSec();
 603         } else {
 604                 if (intl_->keymap == Intl::SECONDARY)
 605                         intl_->keyMapPrim();
 606         }
 607 }
 608
 609
 610 int BufferView::workWidth() const
 611 {
 612         return width_;
 613 }
 614
 615
 616 void BufferView::center()
 617 {
 618         CursorSlice & bot = cursor_.bottom();
 619         TextMetrics & tm = text_metrics_[bot.text()];
 620         pit_type const pit = bot.pit();
 621         tm.redoParagraph(pit);
 622         ParagraphMetrics const & pm = tm.parMetrics(pit);
 623         anchor_ref_ = pit;
 624         offset_ref_ = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary()).y_
 625                 + pm.ascent() - height_ / 2;
 626 }
 627
 628
 629 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 630 {
 631         FuncStatus flag;
 632
 633         switch (cmd.action) {
 634
 635         case LFUN_UNDO:
 636                 flag.enabled(!buffer_->undostack().empty());
 637                 break;
 638         case LFUN_REDO:
 639                 flag.enabled(!buffer_->redostack().empty());
 640                 break;
 641         case LFUN_FILE_INSERT:
 642         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 643         case LFUN_FILE_INSERT_PLAINTEXT:
 644         case LFUN_BOOKMARK_SAVE:
 645                 // FIXME: Actually, these LFUNS should be moved to LyXText
 646                 flag.enabled(cursor_.inTexted());
 647                 break;
 648         case LFUN_FONT_STATE:
 649         case LFUN_LABEL_INSERT:
 650         case LFUN_PARAGRAPH_GOTO:
 651         // FIXME handle non-trivially
 652         case LFUN_OUTLINE_UP:
 653         case LFUN_OUTLINE_DOWN:
 654         case LFUN_OUTLINE_IN:
 655         case LFUN_OUTLINE_OUT:
 656         case LFUN_NOTE_NEXT:
 657         case LFUN_REFERENCE_NEXT:
 658         case LFUN_WORD_FIND:
 659         case LFUN_WORD_REPLACE:
 660         case LFUN_MARK_OFF:
 661         case LFUN_MARK_ON:
 662         case LFUN_MARK_TOGGLE:
 663         case LFUN_SCREEN_RECENTER:
 664         case LFUN_BIBTEX_DATABASE_ADD:
 665         case LFUN_BIBTEX_DATABASE_DEL:
 666         case LFUN_WORDS_COUNT:
 667         case LFUN_NEXT_INSET_TOGGLE:
 668                 flag.enabled(true);
 669                 break;
 670
 671         case LFUN_LABEL_GOTO: {
 672                 flag.enabled(!cmd.argument().empty()
 673                     || getInsetByCode<InsetRef>(cursor_, InsetBase::REF_CODE));
 674                 break;
 675         }
 676
 677         case LFUN_CHANGES_TRACK:
 678                 flag.enabled(true);
 679                 flag.setOnOff(buffer_->params().trackChanges);
 680                 break;
 681
 682         case LFUN_CHANGES_OUTPUT:
 683                 flag.enabled(buffer_ && LaTeXFeatures::isAvailable("dvipost"));
 684                 flag.setOnOff(buffer_->params().outputChanges);
 685                 break;
 686
 687         case LFUN_CHANGES_MERGE:
 688         case LFUN_CHANGE_NEXT:
 689         case LFUN_ALL_CHANGES_ACCEPT:
 690         case LFUN_ALL_CHANGES_REJECT:
 691                 // TODO: context-sensitive enabling of LFUNs
 692                 // In principle, these command should only be enabled if there
 693                 // is a change in the document. However, without proper
 694                 // optimizations, this will inevitably result in poor performance.
 695                 flag.enabled(buffer_);
 696                 break;
 697
 698         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 699                 flag.setOnOff(buffer_->params().compressed);
 700                 break;
 701         }
 702
 703         default:
 704                 flag.enabled(false);
 705         }
 706
 707         return flag;
 708 }
 709
 710
 711 Update::flags BufferView::dispatch(FuncRequest const & cmd)
 712 {
 713         //lyxerr << BOOST_CURRENT_FUNCTION
 714         //       << [ cmd = " << cmd << "]" << endl;
 715
 716         // Make sure that the cached BufferView is correct.
 717         LYXERR(Debug::ACTION) << BOOST_CURRENT_FUNCTION
 718                 << " action[" << cmd.action << ']'
 719                 << " arg[" << to_utf8(cmd.argument()) << ']'
 720                 << " x[" << cmd.x << ']'
 721                 << " y[" << cmd.y << ']'
 722                 << " button[" << cmd.button() << ']'
 723                 << endl;
 724
 725         // FIXME: this should not be possible.
 726         if (!buffer_)
 727                 return Update::None;
 728
 729         LCursor & cur = cursor_;
 730         // Default Update flags.
 731         Update::flags updateFlags = Update::Force | Update::FitCursor;
 732
 733         switch (cmd.action) {
 734
 735         case LFUN_UNDO:
 736                 cur.message(_("Undo"));
 737                 cur.clearSelection();
 738                 if (!textUndo(*this)) {
 739                         cur.message(_("No further undo information"));
 740                         updateFlags = Update::None;
 741                 }
 742                 switchKeyMap();
 743                 break;
 744
 745         case LFUN_REDO:
 746                 cur.message(_("Redo"));
 747                 cur.clearSelection();
 748                 if (!textRedo(*this)) {
 749                         cur.message(_("No further redo information"));
 750                         updateFlags = Update::None;
 751                 }
 752                 switchKeyMap();
 753                 break;
 754
 755         case LFUN_FILE_INSERT:
 756                 // FIXME UNICODE
 757                 menuInsertLyXFile(to_utf8(cmd.argument()));
 758                 break;
 759
 760         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 761                 // FIXME UNICODE
 762                 insertPlaintextFile(this, to_utf8(cmd.argument()), true);
 763                 break;
 764
 765         case LFUN_FILE_INSERT_PLAINTEXT:
 766                 // FIXME UNICODE
 767                 insertPlaintextFile(this, to_utf8(cmd.argument()), false);
 768                 break;
 769
 770         case LFUN_FONT_STATE:
 771                 cur.message(cur.currentState());
 772                 break;
 773
 774         case LFUN_BOOKMARK_SAVE:
 775                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 776                 break;
 777
 778         case LFUN_LABEL_GOTO: {
 779                 docstring label = cmd.argument();
 780                 if (label.empty()) {
 781                         InsetRef * inset =
 782                                 getInsetByCode<InsetRef>(cursor_,
 783                                                          InsetBase::REF_CODE);
 784                         if (inset) {
 785                                 label = inset->getParam("reference");
 786                                 // persistent=false: use temp_bookmark
 787                                 saveBookmark(0);
 788                         }
 789                 }
 790
 791                 if (!label.empty())
 792                         gotoLabel(label);
 793                 break;
 794         }
 795
 796         case LFUN_PARAGRAPH_GOTO: {
 797                 int const id = convert<int>(to_utf8(cmd.argument()));
 798                 int i = 0;
 799                 for (Buffer * b = buffer_; i == 0 || b != buffer_; b = theBufferList().next(b)) {
 800                         ParIterator par = b->getParFromID(id);
 801                         if (par == b->par_iterator_end()) {
 802                                 LYXERR(Debug::INFO)
 803                                         << "No matching paragraph found! ["
 804                                         << id << "]." << endl;
 805                         } else {
 806                                 LYXERR(Debug::INFO)
 807                                         << "Paragraph " << par->id()
 808                                         << " found in buffer `"
 809                                         << b->fileName() << "'." << endl;
 810
 811                                 if (b == buffer_) {
 812                                         // Set the cursor
 813                                         setCursor(makeDocIterator(par, 0));
 814                                         switchKeyMap();
 815                                 } else {
 816                                         // Switch to other buffer view and resend cmd
 817                                         theLyXFunc().dispatch(FuncRequest(
 818                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 819                                         theLyXFunc().dispatch(cmd);
 820                                         updateFlags = Update::None;
 821                                 }
 822                                 break;
 823                         }
 824                         ++i;
 825                 }
 826                 break;
 827         }
 828
 829         case LFUN_OUTLINE_UP:
 830                 toc::outline(toc::Up, cursor_);
 831                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 832                 updateLabels(*buffer_);
 833                 break;
 834         case LFUN_OUTLINE_DOWN:
 835                 toc::outline(toc::Down, cursor_);
 836                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 837                 updateLabels(*buffer_);
 838                 break;
 839         case LFUN_OUTLINE_IN:
 840                 toc::outline(toc::In, cursor_);
 841                 updateLabels(*buffer_);
 842                 break;
 843         case LFUN_OUTLINE_OUT:
 844                 toc::outline(toc::Out, cursor_);
 845                 updateLabels(*buffer_);
 846                 break;
 847
 848         case LFUN_NOTE_NEXT:
 849                 bv_funcs::gotoInset(this, InsetBase::NOTE_CODE, false);
 850                 break;
 851
 852         case LFUN_REFERENCE_NEXT: {
 853                 vector<InsetBase_code> tmp;
 854                 tmp.push_back(InsetBase::LABEL_CODE);
 855                 tmp.push_back(InsetBase::REF_CODE);
 856                 bv_funcs::gotoInset(this, tmp, true);
 857                 break;
 858         }
 859
 860         case LFUN_CHANGES_TRACK:
 861                 buffer_->params().trackChanges = !buffer_->params().trackChanges;
 862                 break;
 863
 864         case LFUN_CHANGES_OUTPUT:
 865                 buffer_->params().outputChanges = !buffer_->params().outputChanges;
 866                 break;
 867
 868         case LFUN_CHANGE_NEXT:
 869                 findNextChange(this);
 870                 break;
 871
 872         case LFUN_CHANGES_MERGE:
 873                 if (findNextChange(this))
 874                         showDialog("changes");
 875                 break;
 876
 877         case LFUN_ALL_CHANGES_ACCEPT:
 878                 // select complete document
 879                 cursor_.reset(buffer_->inset());
 880                 cursor_.selHandle(true);
 881                 buffer_->text().cursorBottom(cursor_);
 882                 // accept everything in a single step to support atomic undo
 883                 buffer_->text().acceptOrRejectChanges(cursor_, LyXText::ACCEPT);
 884                 break;
 885
 886         case LFUN_ALL_CHANGES_REJECT:
 887                 // select complete document
 888                 cursor_.reset(buffer_->inset());
 889                 cursor_.selHandle(true);
 890                 buffer_->text().cursorBottom(cursor_);
 891                 // reject everything in a single step to support atomic undo
 892                 // Note: reject does not work recursively; the user may have to repeat the operation
 893                 buffer_->text().acceptOrRejectChanges(cursor_, LyXText::REJECT);
 894                 break;
 895
 896         case LFUN_WORD_FIND:
 897                 find(this, cmd);
 898                 break;
 899
 900         case LFUN_WORD_REPLACE:
 901                 replace(this, cmd);
 902                 break;
 903
 904         case LFUN_MARK_OFF:
 905                 cur.clearSelection();
 906                 cur.resetAnchor();
 907                 cur.message(from_utf8(N_("Mark off")));
 908                 break;
 909
 910         case LFUN_MARK_ON:
 911                 cur.clearSelection();
 912                 cur.mark() = true;
 913                 cur.resetAnchor();
 914                 cur.message(from_utf8(N_("Mark on")));
 915                 break;
 916
 917         case LFUN_MARK_TOGGLE:
 918                 cur.clearSelection();
 919                 if (cur.mark()) {
 920                         cur.mark() = false;
 921                         cur.message(from_utf8(N_("Mark removed")));
 922                 } else {
 923                         cur.mark() = true;
 924                         cur.message(from_utf8(N_("Mark set")));
 925                 }
 926                 cur.resetAnchor();
 927                 break;
 928
 929         case LFUN_SCREEN_RECENTER:
 930                 center();
 931                 break;
 932
 933         case LFUN_BIBTEX_DATABASE_ADD: {
 934                 LCursor tmpcur = cursor_;
 935                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 936                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 937                                                 InsetBase::BIBTEX_CODE);
 938                 if (inset) {
 939                         if (inset->addDatabase(to_utf8(cmd.argument())))
 940                                 buffer_->updateBibfilesCache();
 941                 }
 942                 break;
 943         }
 944
 945         case LFUN_BIBTEX_DATABASE_DEL: {
 946                 LCursor tmpcur = cursor_;
 947                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 948                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 949                                                 InsetBase::BIBTEX_CODE);
 950                 if (inset) {
 951                         if (inset->delDatabase(to_utf8(cmd.argument())))
 952                                 buffer_->updateBibfilesCache();
 953                 }
 954                 break;
 955         }
 956
 957         case LFUN_WORDS_COUNT: {
 958                 DocIterator from, to;
 959                 if (cur.selection()) {
 960                         from = cur.selectionBegin();
 961                         to = cur.selectionEnd();
 962                 } else {
 963                         from = doc_iterator_begin(buffer_->inset());
 964                         to = doc_iterator_end(buffer_->inset());
 965                 }
 966                 int const count = countWords(from, to);
 967                 docstring message;
 968                 if (count != 1) {
 969                         if (cur.selection())
 970                                 message = bformat(_("%1$d words in selection."),
 971                                           count);
 972                                 else
 973                                         message = bformat(_("%1$d words in document."),
 974                                                           count);
 975                 }
 976                 else {
 977                         if (cur.selection())
 978                                 message = _("One word in selection.");
 979                         else
 980                                 message = _("One word in document.");
 981                 }
 982
 983                 Alert::information(_("Count words"), message);
 984         }
 985                 break;
 986
 987         case LFUN_BUFFER_TOGGLE_COMPRESSION:
 988                 // turn compression on/off
 989                 buffer_->params().compressed = !buffer_->params().compressed;
 990                 break;
 991
 992         case LFUN_NEXT_INSET_TOGGLE: {
 993                 // this is the real function we want to invoke
 994                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
 995                 // if there is an inset at cursor, see whether it
 996                 // wants to toggle.
 997                 InsetBase * inset = cur.nextInset();
 998                 if (inset && inset->isActive()) {
 999                         LCursor tmpcur = cur;
1000                         tmpcur.pushLeft(*inset);
1001                         inset->dispatch(tmpcur, tmpcmd);
1002                         if (tmpcur.result().dispatched()) {
1003                                 cur.dispatched();
1004                         }
1005                 }
1006                 // if it did not work, try the underlying inset.
1007                 if (!cur.result().dispatched())
1008                         cur.dispatch(tmpcmd);
1009
1010                 if (cur.result().dispatched())
1011                         cur.clearSelection();
1012
1013                 break;
1014         }
1015
1016         default:
1017                 updateFlags = Update::None;
1018         }
1019
1020         return updateFlags;
1021 }
1022
1023
1024 docstring const BufferView::requestSelection()
1025 {
1026         if (!buffer_)
1027                 return docstring();
1028
1029         LCursor & cur = cursor_;
1030
1031         if (!cur.selection()) {
1032                 xsel_cache_.set = false;
1033                 return docstring();
1034         }
1035
1036         if (!xsel_cache_.set ||
1037             cur.top() != xsel_cache_.cursor ||
1038             cur.anchor_.top() != xsel_cache_.anchor)
1039         {
1040                 xsel_cache_.cursor = cur.top();
1041                 xsel_cache_.anchor = cur.anchor_.top();
1042                 xsel_cache_.set = cur.selection();
1043                 return cur.selectionAsString(false);
1044         }
1045         return docstring();
1046 }
1047
1048
1049 void BufferView::clearSelection()
1050 {
1051         if (buffer_) {
1052                 cursor_.clearSelection();
1053                 // Clear the selection buffer. Otherwise a subsequent
1054                 // middle-mouse-button paste would use the selection buffer,
1055                 // not the more current external selection.
1056                 cap::clearSelection();
1057                 xsel_cache_.set = false;
1058                 // The buffer did not really change, but this causes the
1059                 // redraw we need because we cleared the selection above.
1060                 buffer_->changed();
1061         }
1062 }
1063
1064
1065 void BufferView::workAreaResize(int width, int height)
1066 {
1067         // Update from work area
1068         width_ = width;
1069         height_ = height;
1070
1071         // The complete text metrics will be redone.
1072         text_metrics_.clear();
1073
1074         if (buffer_)
1075                 resize();
1076 }
1077
1078
1079 InsetBase const * BufferView::getCoveringInset(LyXText const & text, int x, int y)
1080 {
1081         pit_type pit = text.getPitNearY(*this, y);
1082         BOOST_ASSERT(pit != -1);
1083         Paragraph const & par = text.getPar(pit);
1084
1085         LYXERR(Debug::DEBUG)
1086                 << BOOST_CURRENT_FUNCTION
1087                 << ": x: " << x
1088                 << " y: " << y
1089                 << "  pit: " << pit
1090                 << endl;
1091         InsetList::const_iterator iit = par.insetlist.begin();
1092         InsetList::const_iterator iend = par.insetlist.end();
1093         for (; iit != iend; ++iit) {
1094                 InsetBase * const inset = iit->inset;
1095                 if (inset->covers(*this, x, y)) {
1096                         if (!inset->descendable())
1097                                 // No need to go further down if the inset is not
1098                                 // descendable.
1099                                 return inset;
1100
1101                         size_t cell_number = inset->nargs();
1102                         // Check all the inner cell.
1103                         for (size_t i = 0; i != cell_number; ++i) {
1104                                 LyXText const * inner_text = inset->getText(i);
1105                                 if (inner_text) {
1106                                         // Try deeper.
1107                                         InsetBase const * inset_deeper =
1108                                                 getCoveringInset(*inner_text, x, y);
1109                                         if (inset_deeper)
1110                                                 return inset_deeper;
1111                                 }
1112                         }
1113
1114                         LYXERR(Debug::DEBUG)
1115                                 << BOOST_CURRENT_FUNCTION
1116                                 << ": Hit inset: " << inset << endl;
1117                         return inset;
1118                 }
1119         }
1120         LYXERR(Debug::DEBUG)
1121                 << BOOST_CURRENT_FUNCTION
1122                 << ": No inset hit. " << endl;
1123         return 0;
1124 }
1125
1126
1127 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
1128 {
1129         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1130
1131         // This is only called for mouse related events including
1132         // LFUN_FILE_OPEN generated by drag-and-drop.
1133         FuncRequest cmd = cmd0;
1134
1135         // E.g. Qt mouse press when no buffer
1136         if (!buffer_)
1137                 return false;
1138
1139         LCursor cur(*this);
1140         cur.push(buffer_->inset());
1141         cur.selection() = cursor_.selection();
1142
1143         // Either the inset under the cursor or the
1144         // surrounding LyXText will handle this event.
1145
1146         // make sure we stay within the screen...
1147         cmd.y = min(max(cmd.y, -1), height_);
1148
1149         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1150
1151                 // Get inset under mouse, if there is one.
1152                 InsetBase const * covering_inset =
1153                         getCoveringInset(buffer_->text(), cmd.x, cmd.y);
1154                 if (covering_inset == last_inset_)
1155                         // Same inset, no need to do anything...
1156                         return false;
1157
1158                 bool need_redraw = false;
1159                 // const_cast because of setMouseHover().
1160                 InsetBase * inset = const_cast<InsetBase *>(covering_inset);
1161                 if (last_inset_)
1162                         // Remove the hint on the last hovered inset (if any).
1163                         need_redraw |= last_inset_->setMouseHover(false);
1164                 if (inset)
1165                         // Highlighted the newly hovered inset (if any).
1166                         need_redraw |= inset->setMouseHover(true);
1167                 last_inset_ = inset;
1168
1169                 // if last metrics update was in singlepar mode, WorkArea::redraw() will
1170                 // not expose the button for redraw. We adjust here the metrics dimension
1171                 // to enable a full redraw.
1172                 // FIXME: It is possible to redraw only the area around the button!
1173                 if (need_redraw
1174                         && metrics_info_.update_strategy == SingleParUpdate) {
1175                         // FIXME: It should be possible to redraw only the area around
1176                         // the button by doing this:
1177                         //
1178                         //metrics_info_.singlepar = false;
1179                         //metrics_info_.y1 = ymin of button;
1180                         //metrics_info_.y2 = ymax of button;
1181                         //
1182                         // Unfortunately, rowpainter.C:paintText() does not distinguish
1183                         // between background updates and text updates. So we use the hammer
1184                         // solution for now. We could also avoid the updateMetrics() below
1185                         // by using the first and last pit of the CoordCache. Have a look
1186                         // at LyXText::getPitNearY() to see what I mean.
1187                         //
1188                         //metrics_info_.pit1 = first pit of CoordCache;
1189                         //metrics_info_.pit2 = last pit of CoordCache;
1190                         //metrics_info_.singlepar = false;
1191                         //metrics_info_.y1 = 0;
1192                         //metrics_info_.y2 = height_;
1193                         //
1194                         updateMetrics(false);
1195                 }
1196
1197                 // This event (moving without mouse click) is not passed further.
1198                 // This should be changed if it is further utilized.
1199                 return need_redraw;
1200         }
1201
1202         // Build temporary cursor.
1203         InsetBase * inset = buffer_->text().editXY(cur, cmd.x, cmd.y);
1204
1205         // Put anchor at the same position.
1206         cur.resetAnchor();
1207
1208         // Try to dispatch to an non-editable inset near this position
1209         // via the temp cursor. If the inset wishes to change the real
1210         // cursor it has to do so explicitly by using
1211         //  cur.bv().cursor() = cur;  (or similar)
1212         if (inset) {
1213                 inset->dispatch(cur, cmd);
1214         }
1215
1216         // Now dispatch to the temporary cursor. If the real cursor should
1217         // be modified, the inset's dispatch has to do so explicitly.
1218         if (!cur.result().dispatched())
1219                 cur.dispatch(cmd);
1220
1221         // Redraw if requested and necessary.
1222         if (cur.result().dispatched() && cur.result().update())
1223                 return update(cur.result().update());
1224
1225         return false;
1226 }
1227
1228
1229 void BufferView::scroll(int /*lines*/)
1230 {
1231 //      if (!buffer_)
1232 //              return;
1233 //
1234 //      LyXText const * t = &buffer_->text();
1235 //      int const line_height = defaultRowHeight();
1236 //
1237 //      // The new absolute coordinate
1238 //      int new_top_y = top_y() + lines * line_height;
1239 //
1240 //      // Restrict to a valid value
1241 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
1242 //      new_top_y = std::max(0, new_top_y);
1243 //
1244 //      scrollDocView(new_top_y);
1245 //
1246 }
1247
1248
1249 void BufferView::setCursorFromRow(int row)
1250 {
1251         int tmpid = -1;
1252         int tmppos = -1;
1253
1254         buffer_->texrow().getIdFromRow(row, tmpid, tmppos);
1255
1256         if (tmpid == -1)
1257                 buffer_->text().setCursor(cursor_, 0, 0);
1258         else
1259                 buffer_->text().setCursor(cursor_, buffer_->getParFromID(tmpid).pit(), tmppos);
1260 }
1261
1262
1263 void BufferView::gotoLabel(docstring const & label)
1264 {
1265         for (InsetIterator it = inset_iterator_begin(buffer_->inset()); it; ++it) {
1266                 vector<docstring> labels;
1267                 it->getLabelList(*buffer_, labels);
1268                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1269                         setCursor(it);
1270                         update();
1271                         return;
1272                 }
1273         }
1274 }
1275
1276
1277 TextMetrics const & BufferView::textMetrics(LyXText const * t) const
1278 {
1279         return const_cast<BufferView *>(this)->textMetrics(t);
1280 }
1281
1282
1283 TextMetrics & BufferView::textMetrics(LyXText const * t)
1284 {
1285         TextMetricsCache::iterator tmc_it  = text_metrics_.find(t);
1286         if (tmc_it == text_metrics_.end()) {
1287                 tmc_it = text_metrics_.insert(
1288                         make_pair(t, TextMetrics(this, const_cast<LyXText *>(t)))).first;
1289         }
1290         return tmc_it->second;
1291 }
1292
1293
1294 ParagraphMetrics const & BufferView::parMetrics(LyXText const * t,
1295                 pit_type pit) const
1296 {
1297         return textMetrics(t).parMetrics(pit);
1298 }
1299
1300
1301 int BufferView::workHeight() const
1302 {
1303         return height_;
1304 }
1305
1306
1307 void BufferView::setCursor(DocIterator const & dit)
1308 {
1309         size_t const n = dit.depth();
1310         for (size_t i = 0; i < n; ++i)
1311                 dit[i].inset().edit(cursor_, true);
1312
1313         cursor_.setCursor(dit);
1314         cursor_.selection() = false;
1315 }
1316
1317
1318 bool BufferView::checkDepm(LCursor & cur, LCursor & old)
1319 {
1320         // Would be wrong to delete anything if we have a selection.
1321         if (cur.selection())
1322                 return false;
1323
1324         bool need_anchor_change = false;
1325         bool changed = cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1326                 need_anchor_change);
1327
1328         if (need_anchor_change)
1329                 cur.resetAnchor();
1330
1331         if (!changed)
1332                 return false;
1333
1334         updateLabels(*buffer_);
1335
1336         updateMetrics(false);
1337         buffer_->changed();
1338         return true;
1339 }
1340
1341
1342 bool BufferView::mouseSetCursor(LCursor & cur)
1343 {
1344         BOOST_ASSERT(&cur.bv() == this);
1345
1346         // Has the cursor just left the inset?
1347         bool badcursor = false;
1348         bool leftinset = (&cursor_.inset() != &cur.inset());
1349         if (leftinset)
1350                 badcursor = cursor_.inset().notifyCursorLeaves(cursor_);
1351
1352         // do the dEPM magic if needed
1353         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
1354         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
1355         // the leftinset bool would not be necessary (badcursor instead).
1356         bool update = leftinset;
1357         if (!badcursor && cursor_.inTexted())
1358                 update |= checkDepm(cur, cursor_);
1359
1360         // if the cursor was in an empty script inset and the new
1361         // position is in the nucleus of the inset, notifyCursorLeaves
1362         // will kill the script inset itself. So we check all the
1363         // elements of the cursor to make sure that they are correct.
1364         // For an example, see bug 2933:
1365         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1366         // The code below could maybe be moved to a DocIterator method.
1367         //lyxerr << "cur before " << cur <<std::endl;
1368         DocIterator dit(cur.inset());
1369         dit.push_back(cur.bottom());
1370         size_t i = 1;
1371         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1372                 dit.push_back(cur[i]);
1373                 ++i;
1374         }
1375         //lyxerr << "5 cur after" << dit <<std::endl;
1376
1377         cursor_.setCursor(dit);
1378         cursor_.clearSelection();
1379         finishUndo();
1380         return update;
1381 }
1382
1383
1384 void BufferView::putSelectionAt(DocIterator const & cur,
1385                                 int length, bool backwards)
1386 {
1387         cursor_.clearSelection();
1388
1389         setCursor(cur);
1390
1391         if (length) {
1392                 if (backwards) {
1393                         cursor_.pos() += length;
1394                         cursor_.setSelection(cursor_, -length);
1395                 } else
1396                         cursor_.setSelection(cursor_, length);
1397                 cap::saveSelection(cursor_);
1398         }
1399 }
1400
1401
1402 LCursor & BufferView::cursor()
1403 {
1404         return cursor_;
1405 }
1406
1407
1408 LCursor const & BufferView::cursor() const
1409 {
1410         return cursor_;
1411 }
1412
1413
1414 pit_type BufferView::anchor_ref() const
1415 {
1416         return anchor_ref_;
1417 }
1418
1419
1420 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1421 {
1422         return metrics_info_;
1423 }
1424
1425
1426 // FIXME: We should split-up updateMetrics() for the singlepar case.
1427 void BufferView::updateMetrics(bool singlepar)
1428 {
1429         LyXText & buftext = buffer_->text();
1430         TextMetrics & tm = textMetrics(&buftext);
1431         pit_type size = int(buftext.paragraphs().size());
1432
1433         if (anchor_ref_ > int(buftext.paragraphs().size() - 1)) {
1434                 anchor_ref_ = int(buftext.paragraphs().size() - 1);
1435                 offset_ref_ = 0;
1436         }
1437
1438         // If the paragraph metrics has changed, we can not
1439         // use the singlepar optimisation.
1440         if (singlepar
1441                 // In Single Paragraph mode, rebreak only
1442                 // the (main text, not inset!) paragraph containing the cursor.
1443                 // (if this paragraph contains insets etc., rebreaking will
1444                 // recursively descend)
1445                 && tm.redoParagraph(cursor_.bottom().pit()))
1446                 singlepar = false;
1447
1448         pit_type const pit = anchor_ref_;
1449         int pit1 = pit;
1450         int pit2 = pit;
1451         size_t const npit = buftext.paragraphs().size();
1452
1453         // Rebreak anchor paragraph.
1454         if (!singlepar)
1455                 tm.redoParagraph(pit);
1456
1457         // Clear out the position cache in case of full screen redraw.
1458         if (!singlepar)
1459                 coord_cache_.clear();
1460
1461         int y0 = tm.parMetrics(pit).ascent() - offset_ref_;
1462
1463         // Redo paragraphs above anchor if necessary.
1464         int y1 = y0;
1465         while (y1 > 0 && pit1 > 0) {
1466                 y1 -= tm.parMetrics(pit1).ascent();
1467                 --pit1;
1468                 if (!singlepar)
1469                         tm.redoParagraph(pit1);
1470                 y1 -= tm.parMetrics(pit1).descent();
1471         }
1472
1473
1474         // Take care of ascent of first line
1475         y1 -= tm.parMetrics(pit1).ascent();
1476
1477         // Normalize anchor for next time
1478         anchor_ref_ = pit1;
1479         offset_ref_ = -y1;
1480
1481         // Grey at the beginning is ugly
1482         if (pit1 == 0 && y1 > 0) {
1483                 y0 -= y1;
1484                 y1 = 0;
1485                 anchor_ref_ = 0;
1486         }
1487
1488         // Redo paragraphs below the anchor if necessary.
1489         int y2 = y0;
1490         while (y2 < height_ && pit2 < int(npit) - 1) {
1491                 y2 += tm.parMetrics(pit2).descent();
1492                 ++pit2;
1493                 if (!singlepar)
1494                         tm.redoParagraph(pit2);
1495                 y2 += tm.parMetrics(pit2).ascent();
1496         }
1497
1498         // Take care of descent of last line
1499         y2 += tm.parMetrics(pit2).descent();
1500
1501         // The coordinates of all these paragraphs are correct, cache them
1502         int y = y1;
1503         CoordCache::InnerParPosCache & parPos = coord_cache_.parPos()[&buftext];
1504         for (pit_type pit = pit1; pit <= pit2; ++pit) {
1505                 ParagraphMetrics const & pm = tm.parMetrics(pit);
1506                 y += pm.ascent();
1507                 parPos[pit] = Point(0, y);
1508                 if (singlepar && pit == cursor_.bottom().pit()) {
1509                         // In Single Paragraph mode, collect here the
1510                         // y1 and y2 of the (one) paragraph the cursor is in
1511                         y1 = y - pm.ascent();
1512                         y2 = y + pm.descent();
1513                 }
1514                 y += pm.descent();
1515         }
1516
1517         if (singlepar) {
1518                 // collect cursor paragraph iter bounds
1519                 pit1 = cursor_.bottom().pit();
1520                 pit2 = cursor_.bottom().pit();
1521         }
1522
1523         LYXERR(Debug::DEBUG)
1524                 << BOOST_CURRENT_FUNCTION
1525                 << " y1: " << y1
1526                 << " y2: " << y2
1527                 << " pit1: " << pit1
1528                 << " pit2: " << pit2
1529                 << " npit: " << npit
1530                 << " singlepar: " << singlepar
1531                 << "size: " << size
1532                 << endl;
1533
1534         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2,
1535                 singlepar? SingleParUpdate: FullScreenUpdate, size);
1536
1537         if (lyxerr.debugging(Debug::WORKAREA)) {
1538                 LYXERR(Debug::WORKAREA) << "BufferView::updateMetrics" << endl;
1539                 coord_cache_.dump();
1540         }
1541 }
1542
1543
1544 void BufferView::menuInsertLyXFile(string const & filenm)
1545 {
1546         BOOST_ASSERT(cursor_.inTexted());
1547         string filename = filenm;
1548
1549         if (filename.empty()) {
1550                 // Launch a file browser
1551                 // FIXME UNICODE
1552                 string initpath = lyxrc.document_path;
1553
1554                 if (buffer_) {
1555                         string const trypath = buffer_->filePath();
1556                         // If directory is writeable, use this as default.
1557                         if (isDirWriteable(FileName(trypath)))
1558                                 initpath = trypath;
1559                 }
1560
1561                 // FIXME UNICODE
1562                 FileDialog fileDlg(_("Select LyX document to insert"),
1563                         LFUN_FILE_INSERT,
1564                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1565                         make_pair(_("Examples|#E#e"), from_utf8(addPath(package().system_support().absFilename(), "examples"))));
1566
1567                 FileDialog::Result result =
1568                         fileDlg.open(from_utf8(initpath),
1569                                      FileFilterList(_("LyX Documents (*.lyx)")),
1570                                      docstring());
1571
1572                 if (result.first == FileDialog::Later)
1573                         return;
1574
1575                 // FIXME UNICODE
1576                 filename = to_utf8(result.second);
1577
1578                 // check selected filename
1579                 if (filename.empty()) {
1580                         // emit message signal.
1581                         message(_("Canceled."));
1582                         return;
1583                 }
1584         }
1585
1586         // Get absolute path of file and add ".lyx"
1587         // to the filename if necessary
1588         filename = fileSearch(string(), filename, "lyx").absFilename();
1589
1590         docstring const disp_fn = makeDisplayPath(filename);
1591         // emit message signal.
1592         message(bformat(_("Inserting document %1$s..."), disp_fn));
1593
1594         docstring res;
1595         Buffer buf("", false);
1596         if (lyx::loadLyXFile(&buf, FileName(filename))) {
1597                 ErrorList & el = buffer_->errorList("Parse");
1598                 // Copy the inserted document error list into the current buffer one.
1599                 el = buf.errorList("Parse");
1600                 recordUndo(cursor_);
1601                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1602                                              buf.params().textclass, el);
1603                 res = _("Document %1$s inserted.");
1604         } else
1605                 res = _("Could not insert document %1$s");
1606
1607         // emit message signal.
1608         message(bformat(res, disp_fn));
1609         buffer_->errors("Parse");
1610         resize();
1611 }
1612
1613 } // namespace lyx