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