src/BufferView.C

   1 /**
   2  * \file BufferView.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Alfredo Braunstein
   7  * \author Lars Gullik Bjønnes
   8  * \author John Levon
   9  * \author André Pönitz
  10  * \author Jürgen Vigna
  11  *
  12  * Full author contact details are available in file CREDITS.
  13  */
  14
  15 #include <config.h>
  16
  17 #include "BufferView.h"
  18
  19 #include "buffer.h"
  20 #include "buffer_funcs.h"
  21 #include "bufferlist.h"
  22 #include "bufferparams.h"
  23 #include "bufferview_funcs.h"
  24 #include "coordcache.h"
  25 #include "CutAndPaste.h"
  26 #include "debug.h"
  27 #include "dispatchresult.h"
  28 #include "errorlist.h"
  29 #include "factory.h"
  30 #include "FloatList.h"
  31 #include "funcrequest.h"
  32 #include "FuncStatus.h"
  33 #include "gettext.h"
  34 #include "intl.h"
  35 #include "insetiterator.h"
  36 #include "language.h"
  37 #include "LaTeXFeatures.h"
  38 #include "lyx_cb.h" // added for Dispatch functions
  39 #include "lyx_main.h"
  40 #include "lyxfind.h"
  41 #include "lyxfunc.h"
  42 #include "lyxlayout.h"
  43 #include "lyxtext.h"
  44 #include "lyxtextclass.h"
  45 #include "lyxrc.h"
  46 #include "session.h"
  47 #include "paragraph.h"
  48 #include "paragraph_funcs.h"
  49 #include "ParagraphParameters.h"
  50 #include "pariterator.h"
  51 #include "texrow.h"
  52 #include "toc.h"
  53 #include "undo.h"
  54 #include "vspace.h"
  55 #include "WordLangTuple.h"
  56 #include "metricsinfo.h"
  57
  58 #include "insets/insetbibtex.h"
  59 #include "insets/insetcommand.h" // ChangeRefs
  60 #include "insets/insetref.h"
  61 #include "insets/insettext.h"
  62
  63 #include "frontends/Alert.h"
  64 #include "frontends/FileDialog.h"
  65 #include "frontends/FontMetrics.h"
  66 #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
  83 namespace lyx {
  84
  85 using support::addPath;
  86 using support::bformat;
  87 using support::FileFilterList;
  88 using support::FileName;
  89 using support::fileSearch;
  90 using support::isDirWriteable;
  91 using support::isFileReadable;
  92 using support::makeDisplayPath;
  93 using support::package;
  94
  95 using std::distance;
  96 using std::endl;
  97 using std::istringstream;
  98 using std::make_pair;
  99 using std::min;
 100 using std::max;
 101 using std::mem_fun_ref;
 102 using std::string;
 103 using std::vector;
 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(LCursor & cur, InsetBase::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()
 126         : width_(0), height_(0), buffer_(0), 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
 135
 136 BufferView::~BufferView()
 137 {
 138 }
 139
 140
 141 Buffer * BufferView::buffer() const
 142 {
 143         return buffer_;
 144 }
 145
 146
 147 void BufferView::setBuffer(Buffer * b)
 148 {
 149         lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 150                             << "[ b = " << b << "]" << endl;
 151
 152         if (buffer_) {
 153                 // Save the actual cursor position and anchor inside the
 154                 // buffer so that it can be restored in case we rechange
 155                 // to this buffer later on.
 156                 buffer_->saveCursor(cursor_.selectionBegin(),
 157                                     cursor_.selectionEnd());
 158                 // current buffer is going to be switched-off, save cursor pos
 159                 LyX::ref().session().lastFilePos().save(FileName(buffer_->fileName()),
 160                         boost::tie(cursor_.pit(), cursor_.pos()) );
 161         }
 162
 163         // If we're quitting lyx, don't bother updating stuff
 164         if (quitting) {
 165                 buffer_ = 0;
 166                 return;
 167         }
 168
 169         // If we are closing current buffer, switch to the first in
 170         // buffer list.
 171         if (!b) {
 172                 lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 173                                     << " No Buffer!" << endl;
 174                 // We are closing the buffer, use the first buffer as current
 175                 buffer_ = theBufferList().first();
 176         } else {
 177                 // Set current buffer
 178                 buffer_ = b;
 179         }
 180
 181         // Reset old cursor
 182         cursor_ = LCursor(*this);
 183         anchor_ref_ = 0;
 184         offset_ref_ = 0;
 185
 186         if (buffer_) {
 187                 lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 188                                     << "Buffer addr: " << buffer_ << endl;
 189                 cursor_.push(buffer_->inset());
 190                 cursor_.resetAnchor();
 191                 buffer_->text().setCurrentFont(cursor_);
 192                 if (buffer_->getCursor().size() > 0 &&
 193                     buffer_->getAnchor().size() > 0)
 194                 {
 195                         cursor_.setCursor(buffer_->getAnchor().asDocIterator(&(buffer_->inset())));
 196                         cursor_.resetAnchor();
 197                         cursor_.setCursor(buffer_->getCursor().asDocIterator(&(buffer_->inset())));
 198                         cursor_.setSelection();
 199                         theSelection().haveSelection(cursor_.selection());
 200                 }
 201         }
 202
 203         if (buffer_)
 204                 updateMetrics(false);
 205
 206         if (buffer_ && graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 207                 graphics::Previews::get().generateBufferPreviews(*buffer_);
 208 }
 209
 210
 211 bool BufferView::loadLyXFile(FileName const & filename, bool tolastfiles)
 212 {
 213         // File already open?
 214         if (theBufferList().exists(filename.absFilename())) {
 215                 docstring const file = makeDisplayPath(filename.absFilename(), 20);
 216                 docstring text = bformat(_("The document %1$s is already "
 217                                                      "loaded.\n\nDo you want to revert "
 218                                                      "to the saved version?"), file);
 219                 int const ret = Alert::prompt(_("Revert to saved document?"),
 220                         text, 0, 1,  _("&Revert"), _("&Switch to document"));
 221
 222                 if (ret != 0) {
 223                         setBuffer(theBufferList().getBuffer(filename.absFilename()));
 224                         return true;
 225                 }
 226                 // FIXME: should be LFUN_REVERT
 227                 if (!theBufferList().close(theBufferList().getBuffer(filename.absFilename()), false))
 228                         return false;
 229                 // Fall through to new load. (Asger)
 230                 buffer_ = 0;
 231         }
 232
 233         Buffer * b = 0;
 234
 235         if (isFileReadable(filename)) {
 236                 b = theBufferList().newBuffer(filename.absFilename());
 237                 if (!lyx::loadLyXFile(b, filename)) {
 238                         theBufferList().release(b);
 239                         return false;
 240                 }
 241         } else {
 242                 docstring text = bformat(_("The document %1$s does not yet "
 243                                                      "exist.\n\nDo you want to create "
 244                                                      "a new document?"), from_utf8(filename.absFilename()));
 245                 int const ret = Alert::prompt(_("Create new document?"),
 246                          text, 0, 1, _("&Create"), _("Cancel"));
 247
 248                 if (ret == 0) {
 249                         b = newFile(filename.absFilename(), string(), true);
 250                         if (!b)
 251                                 return false;
 252                 } else
 253                         return false;
 254         }
 255
 256         setBuffer(b);
 257         // Send the "errors" signal in case of parsing errors
 258         b->errors("Parse");
 259
 260         // Update the labels and section numbering.
 261         updateLabels(*buffer_);
 262         // scroll to the position when the file was last closed
 263         if (lyxrc.use_lastfilepos) {
 264                 pit_type pit;
 265                 pos_type pos;
 266                 boost::tie(pit, pos) = LyX::ref().session().lastFilePos().load(filename);
 267                 // if successfully move to pit (returned par_id is not zero), update metrics
 268                 if (moveToPosition(pit, 0, pos).get<1>()) {
 269                         if (fitCursor())
 270                                 updateMetrics(false);
 271                 }
 272         }
 273
 274         if (tolastfiles)
 275                 LyX::ref().session().lastFiles().add(FileName(b->fileName()));
 276
 277         return true;
 278 }
 279
 280
 281 void BufferView::resize()
 282 {
 283         if (!buffer_)
 284                 return;
 285
 286         lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION << endl;
 287
 288         updateMetrics(false);
 289         switchKeyMap();
 290 }
 291
 292
 293 bool BufferView::fitCursor()
 294 {
 295         if (bv_funcs::status(this, cursor_) == bv_funcs::CUR_INSIDE) {
 296                 frontend::FontMetrics const & fm =
 297                         theFontMetrics(cursor_.getFont());
 298                 int const asc = fm.maxAscent();
 299                 int const des = fm.maxDescent();
 300                 Point const p = bv_funcs::getPos(*this, cursor_, cursor_.boundary());
 301                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 302                         return false;
 303         }
 304         center();
 305         return true;
 306 }
 307
 308
 309 bool BufferView::multiParSel()
 310 {
 311         if (!cursor_.selection())
 312                 return false;
 313         bool ret = multiparsel_cache_;
 314         multiparsel_cache_ = cursor_.selBegin().pit() != cursor_.selEnd().pit();
 315         // Either this, or previous selection spans paragraphs
 316         return ret || multiparsel_cache_;
 317 }
 318
 319
 320 bool BufferView::update(Update::flags flags)
 321 {
 322         // last_inset_ points to the last visited inset. This pointer may become
 323         // invalid because of keyboard editing. Since all such operations
 324         // causes screen update(), I reset last_inset_ to avoid such a problem.
 325         last_inset_ = 0;
 326         // This is close to a hot-path.
 327         if (lyxerr.debugging(Debug::DEBUG)) {
 328                 lyxerr[Debug::DEBUG]
 329                         << BOOST_CURRENT_FUNCTION
 330                         << "[fitcursor = " << (flags & Update::FitCursor)
 331                         << ", forceupdate = " << (flags & Update::Force)
 332                         << ", singlepar = " << (flags & Update::SinglePar)
 333                         << "]  buffer: " << buffer_ << endl;
 334         }
 335
 336         // Check needed to survive LyX startup
 337         if (!buffer_)
 338                 return false;
 339
 340         if (lyxerr.debugging(Debug::WORKAREA)) {
 341                 lyxerr[Debug::WORKAREA] << "BufferView::update" << std::endl;
 342         }
 343
 344         // Update macro store
 345         buffer_->buildMacros();
 346
 347         // Now do the first drawing step if needed. This consists on updating
 348         // the CoordCache in updateMetrics().
 349         // The second drawing step is done in WorkArea::redraw() if needed.
 350
 351         // Case when no explicit update is requested.
 352         if (!flags) {
 353                 // no need to redraw anything.
 354                 metrics_info_.update_strategy = NoScreenUpdate;
 355                 return false;
 356         }
 357
 358         if (flags == Update::Decoration) {
 359                 metrics_info_.update_strategy = DecorationUpdate;
 360                 return true;
 361         }
 362
 363         if (flags == Update::FitCursor
 364                 || flags == (Update::Decoration | Update::FitCursor)) {
 365                 bool const fit_cursor = fitCursor();
 366                 // tell the frontend to update the screen if needed.
 367                 if (fit_cursor) {
 368                         updateMetrics(false);
 369                         return true;
 370                 }
 371                 if (flags & Update::Decoration) {
 372                         metrics_info_.update_strategy = DecorationUpdate;
 373                         return true;
 374                 }
 375                 // no screen update is needed.
 376                 metrics_info_.update_strategy = NoScreenUpdate;
 377                 return false;
 378         }
 379
 380         bool full_metrics = flags & Update::Force;
 381         if (flags & Update::MultiParSel)
 382                 full_metrics |= multiParSel();
 383
 384         bool const single_par = !full_metrics;
 385         updateMetrics(single_par);
 386
 387         if (flags & Update::FitCursor && fitCursor())
 388                 updateMetrics(false);
 389
 390         // tell the frontend to update the screen.
 391         return true;
 392 }
 393
 394
 395 void BufferView::updateScrollbar()
 396 {
 397         if (!buffer_) {
 398                 lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION
 399                                      << " no text in updateScrollbar" << endl;
 400                 scrollbarParameters_.reset();
 401                 return;
 402         }
 403
 404         LyXText & t = buffer_->text();
 405         TextMetrics & tm = text_metrics_[&t];
 406
 407         int const parsize = int(t.paragraphs().size() - 1);
 408         if (anchor_ref_ >  parsize)  {
 409                 anchor_ref_ = parsize;
 410                 offset_ref_ = 0;
 411         }
 412
 413         if (lyxerr.debugging(Debug::GUI)) {
 414                 lyxerr[Debug::GUI]
 415                         << BOOST_CURRENT_FUNCTION
 416                         << " Updating scrollbar: height: " << t.paragraphs().size()
 417                         << " curr par: " << cursor_.bottom().pit()
 418                         << " default height " << defaultRowHeight() << endl;
 419         }
 420
 421         // It would be better to fix the scrollbar to understand
 422         // values in [0..1] and divide everything by wh
 423
 424         // estimated average paragraph height:
 425         if (wh_ == 0)
 426                 wh_ = height_ / 4;
 427
 428         int h = tm.parMetrics(anchor_ref_).height();
 429
 430         // Normalize anchor/offset (MV):
 431         while (offset_ref_ > h && anchor_ref_ < parsize) {
 432                 anchor_ref_++;
 433                 offset_ref_ -= h;
 434                 h = tm.parMetrics(anchor_ref_).height();
 435         }
 436         // Look at paragraph heights on-screen
 437         int sumh = 0;
 438         int nh = 0;
 439         for (pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 440                 if (sumh > height_)
 441                         break;
 442                 int const h2 = tm.parMetrics(pit).height();
 443                 sumh += h2;
 444                 nh++;
 445         }
 446
 447         BOOST_ASSERT(nh);
 448         int const hav = sumh / nh;
 449         // More realistic average paragraph height
 450         if (hav > wh_)
 451                 wh_ = hav;
 452
 453         BOOST_ASSERT(h);
 454         scrollbarParameters_.height = (parsize + 1) * wh_;
 455         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 456         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 457 }
 458
 459
 460 ScrollbarParameters const & BufferView::scrollbarParameters() const
 461 {
 462         return scrollbarParameters_;
 463 }
 464
 465
 466 void BufferView::scrollDocView(int value)
 467 {
 468         lyxerr[Debug::GUI] << BOOST_CURRENT_FUNCTION
 469                            << "[ value = " << value << "]" << endl;
 470
 471         if (!buffer_)
 472                 return;
 473
 474         LyXText & t = buffer_->text();
 475         TextMetrics & tm = text_metrics_[&t];
 476
 477         float const bar = value / float(wh_ * t.paragraphs().size());
 478
 479         anchor_ref_ = int(bar * t.paragraphs().size());
 480         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 481                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 482
 483         tm.redoParagraph(anchor_ref_);
 484         int const h = tm.parMetrics(anchor_ref_).height();
 485         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 486         updateMetrics(false);
 487 }
 488
 489
 490 void BufferView::setCursorFromScrollbar()
 491 {
 492         LyXText & t = buffer_->text();
 493
 494         int const height = 2 * defaultRowHeight();
 495         int const first = height;
 496         int const last = height_ - height;
 497         LCursor & cur = cursor_;
 498
 499         bv_funcs::CurStatus st = bv_funcs::status(this, cur);
 500
 501         switch (st) {
 502         case bv_funcs::CUR_ABOVE:
 503                 t.setCursorFromCoordinates(cur, 0, first);
 504                 cur.clearSelection();
 505                 break;
 506         case bv_funcs::CUR_BELOW:
 507                 t.setCursorFromCoordinates(cur, 0, last);
 508                 cur.clearSelection();
 509                 break;
 510         case bv_funcs::CUR_INSIDE:
 511                 int const y = bv_funcs::getPos(*this, cur, cur.boundary()).y_;
 512                 int const newy = min(last, max(y, first));
 513                 if (y != newy) {
 514                         cur.reset(buffer_->inset());
 515                         t.setCursorFromCoordinates(cur, 0, newy);
 516                 }
 517         }
 518 }
 519
 520
 521 Change const BufferView::getCurrentChange() const
 522 {
 523         if (!cursor_.selection())
 524                 return Change(Change::UNCHANGED);
 525
 526         DocIterator dit = cursor_.selectionBegin();
 527         return dit.paragraph().lookupChange(dit.pos());
 528 }
 529
 530
 531 void BufferView::saveBookmark(bool persistent)
 532 {
 533         LyX::ref().session().bookmarks().save(
 534                 FileName(buffer_->fileName()),
 535                 cursor_.pit(),
 536                 cursor_.paragraph().id(),
 537                 cursor_.pos(),
 538                 persistent
 539         );
 540         if (persistent)
 541                 // emit message signal.
 542                 message(_("Save bookmark"));
 543 }
 544
 545
 546 boost::tuple<pit_type, int> BufferView::moveToPosition(pit_type par_pit, int par_id, pos_type par_pos)
 547 {
 548         cursor_.clearSelection();
 549
 550         // if a valid par_id is given, try it first
 551         if (par_id > 0) {
 552                 ParIterator par = buffer_->getParFromID(par_id);
 553                 if (par != buffer_->par_iterator_end()) {
 554                         setCursor(makeDocIterator(par, min(par->size(), par_pos)));
 555                         return boost::make_tuple(cursor_.pit(), par_id);
 556                 }
 557         }
 558         // if par_id == 0, or searching through par_id failed
 559         if (static_cast<size_t>(par_pit) < buffer_->paragraphs().size()) {
 560                 ParIterator it = buffer_->par_iterator_begin();
 561                 ParIterator const end = buffer_->par_iterator_end();
 562                 for (; it != end; ++it)
 563                         if (it.pit() == par_pit) {
 564                                 // restored pos may be bigger than it->size
 565                                 setCursor(makeDocIterator(it, min(par_pos, it->size())));
 566                                 return boost::make_tuple(par_pit, it->id());
 567                         }
 568         }
 569         // both methods fail
 570         return boost::make_tuple(pit_type(0), 0);
 571 }
 572
 573
 574 void BufferView::switchKeyMap()
 575 {
 576         if (!lyxrc.rtl_support)
 577                 return;
 578
 579         if (getLyXText()->real_current_font.isRightToLeft()) {
 580                 if (intl_->keymap == Intl::PRIMARY)
 581                         intl_->keyMapSec();
 582         } else {
 583                 if (intl_->keymap == Intl::SECONDARY)
 584                         intl_->keyMapPrim();
 585         }
 586 }
 587
 588
 589 int BufferView::workWidth() const
 590 {
 591         return width_;
 592 }
 593
 594
 595 void BufferView::center()
 596 {
 597         CursorSlice & bot = cursor_.bottom();
 598         TextMetrics & tm = text_metrics_[bot.text()];
 599         pit_type const pit = bot.pit();
 600         tm.redoParagraph(pit);
 601         ParagraphMetrics const & pm = tm.parMetrics(pit);
 602         anchor_ref_ = pit;
 603         offset_ref_ = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary()).y_
 604                 + pm.ascent() - height_ / 2;
 605 }
 606
 607
 608 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 609 {
 610         FuncStatus flag;
 611
 612         switch (cmd.action) {
 613
 614         case LFUN_UNDO:
 615                 flag.enabled(!buffer_->undostack().empty());
 616                 break;
 617         case LFUN_REDO:
 618                 flag.enabled(!buffer_->redostack().empty());
 619                 break;
 620         case LFUN_FILE_INSERT:
 621         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 622         case LFUN_FILE_INSERT_PLAINTEXT:
 623         case LFUN_BOOKMARK_SAVE:
 624                 // FIXME: Actually, these LFUNS should be moved to LyXText
 625                 flag.enabled(cursor_.inTexted());
 626                 break;
 627         case LFUN_FONT_STATE:
 628         case LFUN_LABEL_INSERT:
 629         case LFUN_PARAGRAPH_GOTO:
 630         // FIXME handle non-trivially
 631         case LFUN_OUTLINE_UP:
 632         case LFUN_OUTLINE_DOWN:
 633         case LFUN_OUTLINE_IN:
 634         case LFUN_OUTLINE_OUT:
 635         case LFUN_NOTE_NEXT:
 636         case LFUN_REFERENCE_NEXT:
 637         case LFUN_WORD_FIND:
 638         case LFUN_WORD_REPLACE:
 639         case LFUN_MARK_OFF:
 640         case LFUN_MARK_ON:
 641         case LFUN_MARK_TOGGLE:
 642         case LFUN_SCREEN_RECENTER:
 643         case LFUN_BIBTEX_DATABASE_ADD:
 644         case LFUN_BIBTEX_DATABASE_DEL:
 645         case LFUN_WORDS_COUNT:
 646         case LFUN_NEXT_INSET_TOGGLE:
 647                 flag.enabled(true);
 648                 break;
 649
 650         case LFUN_LABEL_GOTO: {
 651                 flag.enabled(!cmd.argument().empty()
 652                     || getInsetByCode<InsetRef>(cursor_, InsetBase::REF_CODE));
 653                 break;
 654         }
 655
 656         case LFUN_CHANGES_TRACK:
 657                 flag.enabled(true);
 658                 flag.setOnOff(buffer_->params().trackChanges);
 659                 break;
 660
 661         case LFUN_CHANGES_OUTPUT: {
 662                 OutputParams runparams;
 663                 LaTeXFeatures features(*buffer_, buffer_->params(), runparams);
 664                 flag.enabled(buffer_ && features.isAvailable("dvipost"));
 665                 flag.setOnOff(buffer_->params().outputChanges);
 666                 break;
 667         }
 668
 669         case LFUN_CHANGES_MERGE:
 670         case LFUN_CHANGE_NEXT:
 671         case LFUN_ALL_CHANGES_ACCEPT:
 672         case LFUN_ALL_CHANGES_REJECT:
 673                 // TODO: context-sensitive enabling of LFUNs
 674                 // In principle, these command should only be enabled if there
 675                 // is a change in the document. However, without proper
 676                 // optimizations, this will inevitably result in poor performance.
 677                 flag.enabled(buffer_);
 678                 break;
 679
 680         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 681                 flag.setOnOff(buffer_->params().compressed);
 682                 break;
 683         }
 684
 685         default:
 686                 flag.enabled(false);
 687         }
 688
 689         return flag;
 690 }
 691
 692
 693 Update::flags BufferView::dispatch(FuncRequest const & cmd)
 694 {
 695         //lyxerr << BOOST_CURRENT_FUNCTION
 696         //       << [ cmd = " << cmd << "]" << endl;
 697
 698         // Make sure that the cached BufferView is correct.
 699         lyxerr[Debug::ACTION] << BOOST_CURRENT_FUNCTION
 700                 << " action[" << cmd.action << ']'
 701                 << " arg[" << to_utf8(cmd.argument()) << ']'
 702                 << " x[" << cmd.x << ']'
 703                 << " y[" << cmd.y << ']'
 704                 << " button[" << cmd.button() << ']'
 705                 << endl;
 706
 707         // FIXME: this should not be possible.
 708         if (!buffer_)
 709                 return Update::None;
 710
 711         LCursor & cur = cursor_;
 712         // Default Update flags.
 713         Update::flags updateFlags = Update::Force | Update::FitCursor;
 714
 715         switch (cmd.action) {
 716
 717         case LFUN_UNDO:
 718                 cur.message(_("Undo"));
 719                 cur.clearSelection();
 720                 if (!textUndo(*this)) {
 721                         cur.message(_("No further undo information"));
 722                         updateFlags = Update::None;
 723                 }
 724                 switchKeyMap();
 725                 break;
 726
 727         case LFUN_REDO:
 728                 cur.message(_("Redo"));
 729                 cur.clearSelection();
 730                 if (!textRedo(*this)) {
 731                         cur.message(_("No further redo information"));
 732                         updateFlags = Update::None;
 733                 }
 734                 switchKeyMap();
 735                 break;
 736
 737         case LFUN_FILE_INSERT:
 738                 // FIXME UNICODE
 739                 menuInsertLyXFile(to_utf8(cmd.argument()));
 740                 break;
 741
 742         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 743                 // FIXME UNICODE
 744                 insertPlaintextFile(this, to_utf8(cmd.argument()), true);
 745                 break;
 746
 747         case LFUN_FILE_INSERT_PLAINTEXT:
 748                 // FIXME UNICODE
 749                 insertPlaintextFile(this, to_utf8(cmd.argument()), false);
 750                 break;
 751
 752         case LFUN_FONT_STATE:
 753                 cur.message(cur.currentState());
 754                 break;
 755
 756         case LFUN_BOOKMARK_SAVE:
 757                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 758                 break;
 759
 760         case LFUN_LABEL_GOTO: {
 761                 docstring label = cmd.argument();
 762                 if (label.empty()) {
 763                         InsetRef * inset =
 764                                 getInsetByCode<InsetRef>(cursor_,
 765                                                          InsetBase::REF_CODE);
 766                         if (inset) {
 767                                 label = inset->getParam("reference");
 768                                 // persistent=false: use temp_bookmark
 769                                 saveBookmark(false);
 770                         }
 771                 }
 772
 773                 if (!label.empty())
 774                         gotoLabel(label);
 775                 break;
 776         }
 777
 778         case LFUN_PARAGRAPH_GOTO: {
 779                 int const id = convert<int>(to_utf8(cmd.argument()));
 780                 int i = 0;
 781                 for (Buffer * b = buffer_; i == 0 || b != buffer_; b = theBufferList().next(b)) {
 782                         ParIterator par = b->getParFromID(id);
 783                         if (par == b->par_iterator_end()) {
 784                                 lyxerr[Debug::INFO]
 785                                         << "No matching paragraph found! ["
 786                                         << id << "]." << endl;
 787                         } else {
 788                                 lyxerr[Debug::INFO]
 789                                         << "Paragraph " << par->id()
 790                                         << " found in buffer `"
 791                                         << b->fileName() << "'." << endl;
 792
 793                                 if (b == buffer_) {
 794                                         // Set the cursor
 795                                         setCursor(makeDocIterator(par, 0));
 796                                         switchKeyMap();
 797                                 } else {
 798                                         // Switch to other buffer view and resend cmd
 799                                         theLyXFunc().dispatch(FuncRequest(
 800                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 801                                         theLyXFunc().dispatch(cmd);
 802                                         updateFlags = Update::None;
 803                                 }
 804                                 break;
 805                         }
 806                         ++i;
 807                 }
 808                 break;
 809         }
 810
 811         case LFUN_OUTLINE_UP:
 812                 toc::outline(toc::Up, cursor_);
 813                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 814                 updateLabels(*buffer_);
 815                 break;
 816         case LFUN_OUTLINE_DOWN:
 817                 toc::outline(toc::Down, cursor_);
 818                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 819                 updateLabels(*buffer_);
 820                 break;
 821         case LFUN_OUTLINE_IN:
 822                 toc::outline(toc::In, cursor_);
 823                 updateLabels(*buffer_);
 824                 break;
 825         case LFUN_OUTLINE_OUT:
 826                 toc::outline(toc::Out, cursor_);
 827                 updateLabels(*buffer_);
 828                 break;
 829
 830         case LFUN_NOTE_NEXT:
 831                 bv_funcs::gotoInset(this, InsetBase::NOTE_CODE, false);
 832                 break;
 833
 834         case LFUN_REFERENCE_NEXT: {
 835                 vector<InsetBase_code> tmp;
 836                 tmp.push_back(InsetBase::LABEL_CODE);
 837                 tmp.push_back(InsetBase::REF_CODE);
 838                 bv_funcs::gotoInset(this, tmp, true);
 839                 break;
 840         }
 841
 842         case LFUN_CHANGES_TRACK:
 843                 buffer_->params().trackChanges = !buffer_->params().trackChanges;
 844                 break;
 845
 846         case LFUN_CHANGES_OUTPUT:
 847                 buffer_->params().outputChanges = !buffer_->params().outputChanges;
 848                 break;
 849
 850         case LFUN_CHANGE_NEXT:
 851                 findNextChange(this);
 852                 break;
 853
 854         case LFUN_CHANGES_MERGE:
 855                 if (findNextChange(this))
 856                         showDialog("changes");
 857                 break;
 858
 859         case LFUN_ALL_CHANGES_ACCEPT: {
 860                 cursor_.reset(buffer_->inset());
 861 #ifdef WITH_WARNINGS
 862 #warning FIXME changes
 863 #endif
 864                 while (findNextChange(this))
 865                         getLyXText()->acceptOrRejectChanges(cursor_, LyXText::ACCEPT);
 866                 break;
 867         }
 868
 869         case LFUN_ALL_CHANGES_REJECT: {
 870                 cursor_.reset(buffer_->inset());
 871 #ifdef WITH_WARNINGS
 872 #warning FIXME changes
 873 #endif
 874                 while (findNextChange(this))
 875                         getLyXText()->acceptOrRejectChanges(cursor_, LyXText::REJECT);
 876                 break;
 877         }
 878
 879         case LFUN_WORD_FIND:
 880                 find(this, cmd);
 881                 break;
 882
 883         case LFUN_WORD_REPLACE:
 884                 replace(this, cmd);
 885                 break;
 886
 887         case LFUN_MARK_OFF:
 888                 cur.clearSelection();
 889                 cur.resetAnchor();
 890                 cur.message(from_utf8(N_("Mark off")));
 891                 break;
 892
 893         case LFUN_MARK_ON:
 894                 cur.clearSelection();
 895                 cur.mark() = true;
 896                 cur.resetAnchor();
 897                 cur.message(from_utf8(N_("Mark on")));
 898                 break;
 899
 900         case LFUN_MARK_TOGGLE:
 901                 cur.clearSelection();
 902                 if (cur.mark()) {
 903                         cur.mark() = false;
 904                         cur.message(from_utf8(N_("Mark removed")));
 905                 } else {
 906                         cur.mark() = true;
 907                         cur.message(from_utf8(N_("Mark set")));
 908                 }
 909                 cur.resetAnchor();
 910                 break;
 911
 912         case LFUN_SCREEN_RECENTER:
 913                 center();
 914                 break;
 915
 916         case LFUN_BIBTEX_DATABASE_ADD: {
 917                 LCursor tmpcur = cursor_;
 918                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 919                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 920                                                 InsetBase::BIBTEX_CODE);
 921                 if (inset) {
 922                         if (inset->addDatabase(to_utf8(cmd.argument())))
 923                                 buffer_->updateBibfilesCache();
 924                 }
 925                 break;
 926         }
 927
 928         case LFUN_BIBTEX_DATABASE_DEL: {
 929                 LCursor tmpcur = cursor_;
 930                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 931                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 932                                                 InsetBase::BIBTEX_CODE);
 933                 if (inset) {
 934                         if (inset->delDatabase(to_utf8(cmd.argument())))
 935                                 buffer_->updateBibfilesCache();
 936                 }
 937                 break;
 938         }
 939
 940         case LFUN_WORDS_COUNT: {
 941                 DocIterator from, to;
 942                 if (cur.selection()) {
 943                         from = cur.selectionBegin();
 944                         to = cur.selectionEnd();
 945                 } else {
 946                         from = doc_iterator_begin(buffer_->inset());
 947                         to = doc_iterator_end(buffer_->inset());
 948                 }
 949                 int const count = countWords(from, to);
 950                 docstring message;
 951                 if (count != 1) {
 952                         if (cur.selection())
 953                                 message = bformat(_("%1$d words in selection."),
 954                                           count);
 955                                 else
 956                                         message = bformat(_("%1$d words in document."),
 957                                                           count);
 958                 }
 959                 else {
 960                         if (cur.selection())
 961                                 message = _("One word in selection.");
 962                         else
 963                                 message = _("One word in document.");
 964                 }
 965
 966                 Alert::information(_("Count words"), message);
 967         }
 968                 break;
 969
 970         case LFUN_BUFFER_TOGGLE_COMPRESSION:
 971                 // turn compression on/off
 972                 buffer_->params().compressed = !buffer_->params().compressed;
 973                 break;
 974
 975         case LFUN_NEXT_INSET_TOGGLE: {
 976                 // this is the real function we want to invoke
 977                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
 978                 // if there is an inset at cursor, see whether it
 979                 // wants to toggle.
 980                 InsetBase * inset = cur.nextInset();
 981                 if (inset && inset->isActive()) {
 982                         LCursor tmpcur = cur;
 983                         tmpcur.pushLeft(*inset);
 984                         inset->dispatch(tmpcur, tmpcmd);
 985                         if (tmpcur.result().dispatched()) {
 986                                 cur.dispatched();
 987                         }
 988                 }
 989                 // if it did not work, try the underlying inset.
 990                 if (!cur.result().dispatched())
 991                         cur.dispatch(tmpcmd);
 992
 993                 if (cur.result().dispatched())
 994                         cur.clearSelection();
 995
 996                 break;
 997         }
 998
 999         default:
1000                 updateFlags = Update::None;
1001         }
1002
1003         return updateFlags;
1004 }
1005
1006
1007 docstring const BufferView::requestSelection()
1008 {
1009         if (!buffer_)
1010                 return docstring();
1011
1012         LCursor & cur = cursor_;
1013
1014         if (!cur.selection()) {
1015                 xsel_cache_.set = false;
1016                 return docstring();
1017         }
1018
1019         if (!xsel_cache_.set ||
1020             cur.top() != xsel_cache_.cursor ||
1021             cur.anchor_.top() != xsel_cache_.anchor)
1022         {
1023                 xsel_cache_.cursor = cur.top();
1024                 xsel_cache_.anchor = cur.anchor_.top();
1025                 xsel_cache_.set = cur.selection();
1026                 return cur.selectionAsString(false);
1027         }
1028         return docstring();
1029 }
1030
1031
1032 void BufferView::clearSelection()
1033 {
1034         if (buffer_) {
1035                 cursor_.clearSelection();
1036                 xsel_cache_.set = false;
1037                 // The buffer did not really change, but this causes the
1038                 // redraw we need because we cleared the selection above.
1039                 buffer_->changed();
1040         }
1041 }
1042
1043
1044 void BufferView::workAreaResize(int width, int height)
1045 {
1046         // Update from work area
1047         width_ = width;
1048         height_ = height;
1049
1050         // The complete text metrics will be redone.
1051         text_metrics_.clear();
1052
1053         if (buffer_)
1054                 resize();
1055 }
1056
1057
1058 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
1059 {
1060         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1061
1062         // This is only called for mouse related events including
1063         // LFUN_FILE_OPEN generated by drag-and-drop.
1064         FuncRequest cmd = cmd0;
1065
1066         // E.g. Qt mouse press when no buffer
1067         if (!buffer_)
1068                 return false;
1069
1070         LCursor cur(*this);
1071         cur.push(buffer_->inset());
1072         cur.selection() = cursor_.selection();
1073
1074         // Either the inset under the cursor or the
1075         // surrounding LyXText will handle this event.
1076
1077         // Build temporary cursor.
1078         cmd.y = min(max(cmd.y, -1), height_);
1079         InsetBase * inset = buffer_->text().editXY(cur, cmd.x, cmd.y);
1080
1081         //lyxerr << BOOST_CURRENT_FUNCTION
1082         //       << " * hit inset at tip: " << inset << endl;
1083         //lyxerr << BOOST_CURRENT_FUNCTION
1084         //       << " * created temp cursor:" << cur << endl;
1085
1086         // NOTE: editXY returns the top level inset of nested insets. If you happen
1087         // to move from a text (inset=0) to a text inside an inset (e.g. an opened
1088         // footnote inset, again inset=0), that inset will not be redrawn.
1089         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1090                 bool need_redraw = false;
1091
1092                 if (inset != last_inset_) {
1093                         if (last_inset_)
1094                                 need_redraw |= last_inset_->setMouseHover(false);
1095                         if (inset)
1096                                 need_redraw |= inset->setMouseHover(true);
1097                         last_inset_ = inset;
1098                 }
1099
1100                 // if last metrics update was in singlepar mode, WorkArea::redraw() will
1101                 // not expose the button for redraw. We adjust here the metrics dimension
1102                 // to enable a full redraw.
1103                 // FIXME: It is possible to redraw only the area around the button!
1104                 if (need_redraw
1105                         && metrics_info_.update_strategy == SingleParUpdate) {
1106                         // FIXME: It should be possible to redraw only the area around
1107                         // the button by doing this:
1108                         //
1109                         //metrics_info_.singlepar = false;
1110                         //metrics_info_.y1 = ymin of button;
1111                         //metrics_info_.y2 = ymax of button;
1112                         //
1113                         // Unfortunately, rowpainter.C:paintText() does not distinguish
1114                         // between background updates and text updates. So we use the hammer
1115                         // solution for now. We could also avoid the updateMetrics() below
1116                         // by using the first and last pit of the CoordCache. Have a look
1117                         // at LyXText::getPitNearY() to see what I mean.
1118                         //
1119                         //metrics_info_.pit1 = first pit of CoordCache;
1120                         //metrics_info_.pit2 = last pit of CoordCache;
1121                         //metrics_info_.singlepar = false;
1122                         //metrics_info_.y1 = 0;
1123                         //metrics_info_.y2 = height_;
1124                         //
1125                         updateMetrics(false);
1126                 }
1127
1128                 // This event (moving without mouse click) is not passed further.
1129                 // This should be changed if it is further utilized.
1130                 return need_redraw;
1131         }
1132
1133         // Put anchor at the same position.
1134         cur.resetAnchor();
1135
1136         // Try to dispatch to an non-editable inset near this position
1137         // via the temp cursor. If the inset wishes to change the real
1138         // cursor it has to do so explicitly by using
1139         //  cur.bv().cursor() = cur;  (or similar)
1140         if (inset) {
1141                 inset->dispatch(cur, cmd);
1142         }
1143
1144         // Now dispatch to the temporary cursor. If the real cursor should
1145         // be modified, the inset's dispatch has to do so explicitly.
1146         if (!cur.result().dispatched())
1147                 cur.dispatch(cmd);
1148
1149         // Redraw if requested and necessary.
1150         if (cur.result().dispatched() && cur.result().update())
1151                 return update(cur.result().update());
1152
1153         return false;
1154 }
1155
1156
1157 void BufferView::scroll(int /*lines*/)
1158 {
1159 //      if (!buffer_)
1160 //              return;
1161 //
1162 //      LyXText const * t = &buffer_->text();
1163 //      int const line_height = defaultRowHeight();
1164 //
1165 //      // The new absolute coordinate
1166 //      int new_top_y = top_y() + lines * line_height;
1167 //
1168 //      // Restrict to a valid value
1169 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
1170 //      new_top_y = std::max(0, new_top_y);
1171 //
1172 //      scrollDocView(new_top_y);
1173 //
1174 }
1175
1176
1177 void BufferView::setCursorFromRow(int row)
1178 {
1179         int tmpid = -1;
1180         int tmppos = -1;
1181
1182         buffer_->texrow().getIdFromRow(row, tmpid, tmppos);
1183
1184         if (tmpid == -1)
1185                 buffer_->text().setCursor(cursor_, 0, 0);
1186         else
1187                 buffer_->text().setCursor(cursor_, buffer_->getParFromID(tmpid).pit(), tmppos);
1188 }
1189
1190
1191 void BufferView::gotoLabel(docstring const & label)
1192 {
1193         for (InsetIterator it = inset_iterator_begin(buffer_->inset()); it; ++it) {
1194                 vector<docstring> labels;
1195                 it->getLabelList(*buffer_, labels);
1196                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1197                         setCursor(it);
1198                         update();
1199                         return;
1200                 }
1201         }
1202 }
1203
1204
1205 LyXText * BufferView::getLyXText()
1206 {
1207         LyXText * text = cursor_.innerText();
1208         BOOST_ASSERT(text);
1209         return text;
1210 }
1211
1212
1213 LyXText const * BufferView::getLyXText() const
1214 {
1215         LyXText const * text = cursor_.innerText();
1216         BOOST_ASSERT(text);
1217         return text;
1218 }
1219
1220
1221 TextMetrics const & BufferView::textMetrics(LyXText const * t) const
1222 {
1223         return const_cast<BufferView *>(this)->textMetrics(t);
1224 }
1225
1226
1227 TextMetrics & BufferView::textMetrics(LyXText const * t)
1228 {
1229         TextMetricsCache::iterator tmc_it  = text_metrics_.find(t);
1230         if (tmc_it == text_metrics_.end()) {
1231                 tmc_it = text_metrics_.insert(
1232                         make_pair(t, TextMetrics(this, const_cast<LyXText *>(t)))).first;
1233         }
1234         return tmc_it->second;
1235 }
1236
1237
1238 ParagraphMetrics const & BufferView::parMetrics(LyXText const * t,
1239                 pit_type pit) const
1240 {
1241         return textMetrics(t).parMetrics(pit);
1242 }
1243
1244
1245 int BufferView::workHeight() const
1246 {
1247         return height_;
1248 }
1249
1250
1251 void BufferView::setCursor(DocIterator const & dit)
1252 {
1253         size_t const n = dit.depth();
1254         for (size_t i = 0; i < n; ++i)
1255                 dit[i].inset().edit(cursor_, true);
1256
1257         cursor_.setCursor(dit);
1258         cursor_.selection() = false;
1259 }
1260
1261
1262 bool BufferView::checkDepm(LCursor & cur, LCursor & old)
1263 {
1264         // Would be wrong to delete anything if we have a selection.
1265         if (cur.selection())
1266                 return false;
1267
1268         bool need_anchor_change = false;
1269         bool changed = cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1270                 need_anchor_change);
1271
1272         if (need_anchor_change)
1273                 cur.resetAnchor();
1274
1275         if (!changed)
1276                 return false;
1277
1278         updateMetrics(false);
1279         buffer_->changed();
1280         return true;
1281 }
1282
1283
1284 bool BufferView::mouseSetCursor(LCursor & cur)
1285 {
1286         BOOST_ASSERT(&cur.bv() == this);
1287
1288         // Has the cursor just left the inset?
1289         bool badcursor = false;
1290         if (&cursor_.inset() != &cur.inset())
1291                 badcursor = cursor_.inset().notifyCursorLeaves(cursor_);
1292
1293         // do the dEPM magic if needed
1294         // FIXME: move this to InsetText::notifyCursorLeaves?
1295         bool update = false;
1296         if (!badcursor && cursor_.inTexted())
1297                 checkDepm(cur, cursor_);
1298
1299         // if the cursor was in an empty script inset and the new
1300         // position is in the nucleus of the inset, notifyCursorLeaves
1301         // will kill the script inset itself. So we check all the
1302         // elements of the cursor to make sure that they are correct.
1303         // For an example, see bug 2933:
1304         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1305         // The code below could maybe be moved to a DocIterator method.
1306         //lyxerr << "cur before " << cur <<std::endl;
1307         DocIterator dit(cur.inset());
1308         dit.push_back(cur.bottom());
1309         size_t i = 1;
1310         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1311                 dit.push_back(cur[i]);
1312                 ++i;
1313         }
1314         //lyxerr << "5 cur after" << dit <<std::endl;
1315
1316         cursor_.setCursor(dit);
1317         cursor_.clearSelection();
1318         // remember new position.
1319         cursor_.setTargetX();
1320         finishUndo();
1321         return update;
1322 }
1323
1324
1325 void BufferView::putSelectionAt(DocIterator const & cur,
1326                                 int length, bool backwards)
1327 {
1328         cursor_.clearSelection();
1329
1330         setCursor(cur);
1331
1332         if (length) {
1333                 if (backwards) {
1334                         cursor_.pos() += length;
1335                         cursor_.setSelection(cursor_, -length);
1336                 } else
1337                         cursor_.setSelection(cursor_, length);
1338                 theSelection().haveSelection(cursor_.selection());
1339         }
1340 }
1341
1342
1343 LCursor & BufferView::cursor()
1344 {
1345         return cursor_;
1346 }
1347
1348
1349 LCursor const & BufferView::cursor() const
1350 {
1351         return cursor_;
1352 }
1353
1354
1355 pit_type BufferView::anchor_ref() const
1356 {
1357         return anchor_ref_;
1358 }
1359
1360
1361 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1362 {
1363         return metrics_info_;
1364 }
1365
1366
1367 // FIXME: We should split-up updateMetrics() for the singlepar case.
1368 void BufferView::updateMetrics(bool singlepar)
1369 {
1370         LyXText & buftext = buffer_->text();
1371         TextMetrics & tm = textMetrics(&buftext);
1372         pit_type size = int(buftext.paragraphs().size());
1373
1374         if (anchor_ref_ > int(buftext.paragraphs().size() - 1)) {
1375                 anchor_ref_ = int(buftext.paragraphs().size() - 1);
1376                 offset_ref_ = 0;
1377         }
1378
1379         // If the paragraph metrics has changed, we can not
1380         // use the singlepar optimisation.
1381         if (singlepar
1382                 // In Single Paragraph mode, rebreak only
1383                 // the (main text, not inset!) paragraph containing the cursor.
1384                 // (if this paragraph contains insets etc., rebreaking will
1385                 // recursively descend)
1386                 && tm.redoParagraph(cursor_.bottom().pit()))
1387                 singlepar = false;
1388
1389         pit_type const pit = anchor_ref_;
1390         int pit1 = pit;
1391         int pit2 = pit;
1392         size_t const npit = buftext.paragraphs().size();
1393
1394         // Rebreak anchor paragraph.
1395         if (!singlepar)
1396                 tm.redoParagraph(pit);
1397
1398         // Clear out the position cache in case of full screen redraw.
1399         if (!singlepar)
1400                 coord_cache_.clear();
1401
1402         int y0 = tm.parMetrics(pit).ascent() - offset_ref_;
1403
1404         // Redo paragraphs above anchor if necessary.
1405         int y1 = y0;
1406         while (y1 > 0 && pit1 > 0) {
1407                 y1 -= tm.parMetrics(pit1).ascent();
1408                 --pit1;
1409                 if (!singlepar)
1410                         tm.redoParagraph(pit1);
1411                 y1 -= tm.parMetrics(pit1).descent();
1412         }
1413
1414
1415         // Take care of ascent of first line
1416         y1 -= tm.parMetrics(pit1).ascent();
1417
1418         // Normalize anchor for next time
1419         anchor_ref_ = pit1;
1420         offset_ref_ = -y1;
1421
1422         // Grey at the beginning is ugly
1423         if (pit1 == 0 && y1 > 0) {
1424                 y0 -= y1;
1425                 y1 = 0;
1426                 anchor_ref_ = 0;
1427         }
1428
1429         // Redo paragraphs below the anchor if necessary.
1430         int y2 = y0;
1431         while (y2 < height_ && pit2 < int(npit) - 1) {
1432                 y2 += tm.parMetrics(pit2).descent();
1433                 ++pit2;
1434                 if (!singlepar)
1435                         tm.redoParagraph(pit2);
1436                 y2 += tm.parMetrics(pit2).ascent();
1437         }
1438
1439         // Take care of descent of last line
1440         y2 += tm.parMetrics(pit2).descent();
1441
1442         // The coordinates of all these paragraphs are correct, cache them
1443         int y = y1;
1444         CoordCache::InnerParPosCache & parPos = coord_cache_.parPos()[&buftext];
1445         for (pit_type pit = pit1; pit <= pit2; ++pit) {
1446                 ParagraphMetrics const & pm = tm.parMetrics(pit);
1447                 y += pm.ascent();
1448                 parPos[pit] = Point(0, y);
1449                 if (singlepar && pit == cursor_.bottom().pit()) {
1450                         // In Single Paragraph mode, collect here the
1451                         // y1 and y2 of the (one) paragraph the cursor is in
1452                         y1 = y - pm.ascent();
1453                         y2 = y + pm.descent();
1454                 }
1455                 y += pm.descent();
1456         }
1457
1458         if (singlepar) {
1459                 // collect cursor paragraph iter bounds
1460                 pit1 = cursor_.bottom().pit();
1461                 pit2 = cursor_.bottom().pit();
1462         }
1463
1464         lyxerr[Debug::DEBUG]
1465                 << BOOST_CURRENT_FUNCTION
1466                 << " y1: " << y1
1467                 << " y2: " << y2
1468                 << " pit1: " << pit1
1469                 << " pit2: " << pit2
1470                 << " npit: " << npit
1471                 << " singlepar: " << singlepar
1472                 << "size: " << size
1473                 << endl;
1474
1475         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2,
1476                 singlepar? SingleParUpdate: FullScreenUpdate, size);
1477
1478         if (lyxerr.debugging(Debug::WORKAREA)) {
1479                 lyxerr[Debug::WORKAREA] << "BufferView::updateMetrics" << endl;
1480                 coord_cache_.dump();
1481         }
1482 }
1483
1484
1485 void BufferView::menuInsertLyXFile(string const & filenm)
1486 {
1487         BOOST_ASSERT(cursor_.inTexted());
1488         string filename = filenm;
1489
1490         if (filename.empty()) {
1491                 // Launch a file browser
1492                 // FIXME UNICODE
1493                 string initpath = lyxrc.document_path;
1494
1495                 if (buffer_) {
1496                         string const trypath = buffer_->filePath();
1497                         // If directory is writeable, use this as default.
1498                         if (isDirWriteable(FileName(trypath)))
1499                                 initpath = trypath;
1500                 }
1501
1502                 // FIXME UNICODE
1503                 FileDialog fileDlg(_("Select LyX document to insert"),
1504                         LFUN_FILE_INSERT,
1505                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1506                         make_pair(_("Examples|#E#e"), from_utf8(addPath(package().system_support(), "examples"))));
1507
1508                 FileDialog::Result result =
1509                         fileDlg.open(from_utf8(initpath),
1510                                      FileFilterList(_("LyX Documents (*.lyx)")),
1511                                      docstring());
1512
1513                 if (result.first == FileDialog::Later)
1514                         return;
1515
1516                 // FIXME UNICODE
1517                 filename = to_utf8(result.second);
1518
1519                 // check selected filename
1520                 if (filename.empty()) {
1521                         // emit message signal.
1522                         message(_("Canceled."));
1523                         return;
1524                 }
1525         }
1526
1527         // Get absolute path of file and add ".lyx"
1528         // to the filename if necessary
1529         filename = fileSearch(string(), filename, "lyx").absFilename();
1530
1531         docstring const disp_fn = makeDisplayPath(filename);
1532         // emit message signal.
1533         message(bformat(_("Inserting document %1$s..."), disp_fn));
1534
1535         docstring res;
1536         Buffer buf("", false);
1537         if (lyx::loadLyXFile(&buf, FileName(filename))) {
1538                 ErrorList & el = buffer_->errorList("Parse");
1539                 // Copy the inserted document error list into the current buffer one.
1540                 el = buf.errorList("Parse");
1541                 recordUndo(cursor_);
1542                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1543                                              buf.params().textclass, el);
1544                 res = _("Document %1$s inserted.");
1545         } else
1546                 res = _("Could not insert document %1$s");
1547
1548         // emit message signal.
1549         message(bformat(res, disp_fn));
1550         buffer_->errors("Parse");
1551         resize();
1552 }
1553
1554 } // namespace lyx