src/BufferView.cpp

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