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                 // update bookmark pit of the current buffer before switch
 159                 for (size_t i = 0; i < LyX::ref().session().bookmarks().size(); ++i) {
 160                         BookmarksSection::Bookmark const & bm = LyX::ref().session().bookmarks().bookmark(i);
 161                         if (buffer()->fileName() != bm.filename.absFilename())
 162                                 continue;
 163                         // if par_id or pit has been changed, reset par_pit and par_id
 164                         // see http://bugzilla.lyx.org/show_bug.cgi?id=3092
 165                         pit_type new_pit;
 166                         int new_id;
 167                         boost::tie(new_pit, new_id) = moveToPosition(bm.par_pit, bm.par_id, bm.par_pos);
 168                         if (bm.par_pit != new_pit || bm.par_id != new_id)
 169                                 const_cast<BookmarksSection::Bookmark &>(bm).setPos(new_pit, new_id);
 170                 }
 171                 // current buffer is going to be switched-off, save cursor pos
 172                 LyX::ref().session().lastFilePos().save(FileName(buffer_->fileName()),
 173                         boost::tie(cursor_.pit(), cursor_.pos()) );
 174         }
 175
 176         // If we're quitting lyx, don't bother updating stuff
 177         if (quitting) {
 178                 buffer_ = 0;
 179                 return;
 180         }
 181
 182         // If we are closing current buffer, switch to the first in
 183         // buffer list.
 184         if (!b) {
 185                 lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 186                                     << " No Buffer!" << endl;
 187                 // We are closing the buffer, use the first buffer as current
 188                 buffer_ = theBufferList().first();
 189         } else {
 190                 // Set current buffer
 191                 buffer_ = b;
 192         }
 193
 194         // Reset old cursor
 195         cursor_ = LCursor(*this);
 196         anchor_ref_ = 0;
 197         offset_ref_ = 0;
 198
 199         if (buffer_) {
 200                 lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 201                                     << "Buffer addr: " << buffer_ << endl;
 202                 cursor_.push(buffer_->inset());
 203                 cursor_.resetAnchor();
 204                 buffer_->text().setCurrentFont(cursor_);
 205                 if (buffer_->getCursor().size() > 0 &&
 206                     buffer_->getAnchor().size() > 0)
 207                 {
 208                         cursor_.setCursor(buffer_->getAnchor().asDocIterator(&(buffer_->inset())));
 209                         cursor_.resetAnchor();
 210                         cursor_.setCursor(buffer_->getCursor().asDocIterator(&(buffer_->inset())));
 211                         cursor_.setSelection();
 212                         theSelection().haveSelection(cursor_.selection());
 213                 }
 214         }
 215
 216         if (buffer_)
 217                 updateMetrics(false);
 218
 219         if (buffer_ && graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 220                 graphics::Previews::get().generateBufferPreviews(*buffer_);
 221 }
 222
 223
 224 bool BufferView::loadLyXFile(FileName const & filename, bool tolastfiles)
 225 {
 226         // File already open?
 227         if (theBufferList().exists(filename.absFilename())) {
 228                 docstring const file = makeDisplayPath(filename.absFilename(), 20);
 229                 docstring text = bformat(_("The document %1$s is already "
 230                                                      "loaded.\n\nDo you want to revert "
 231                                                      "to the saved version?"), file);
 232                 int const ret = Alert::prompt(_("Revert to saved document?"),
 233                         text, 0, 1,  _("&Revert"), _("&Switch to document"));
 234
 235                 if (ret != 0) {
 236                         setBuffer(theBufferList().getBuffer(filename.absFilename()));
 237                         return true;
 238                 }
 239                 // FIXME: should be LFUN_REVERT
 240                 if (!theBufferList().close(theBufferList().getBuffer(filename.absFilename()), false))
 241                         return false;
 242                 // Fall through to new load. (Asger)
 243                 buffer_ = 0;
 244         }
 245
 246         Buffer * b = 0;
 247
 248         if (isFileReadable(filename)) {
 249                 b = theBufferList().newBuffer(filename.absFilename());
 250                 if (!lyx::loadLyXFile(b, filename)) {
 251                         theBufferList().release(b);
 252                         return false;
 253                 }
 254         } else {
 255                 docstring text = bformat(_("The document %1$s does not yet "
 256                                                      "exist.\n\nDo you want to create "
 257                                                      "a new document?"), from_utf8(filename.absFilename()));
 258                 int const ret = Alert::prompt(_("Create new document?"),
 259                          text, 0, 1, _("&Create"), _("Cancel"));
 260
 261                 if (ret == 0) {
 262                         b = newFile(filename.absFilename(), string(), true);
 263                         if (!b)
 264                                 return false;
 265                 } else
 266                         return false;
 267         }
 268
 269         setBuffer(b);
 270         // Send the "errors" signal in case of parsing errors
 271         b->errors("Parse");
 272
 273         // Update the labels and section numbering.
 274         updateLabels(*buffer_);
 275         // scroll to the position when the file was last closed
 276         if (lyxrc.use_lastfilepos) {
 277                 pit_type pit;
 278                 pos_type pos;
 279                 boost::tie(pit, pos) = LyX::ref().session().lastFilePos().load(filename);
 280                 // if successfully move to pit (returned par_id is not zero), update metrics
 281                 if (moveToPosition(pit, 0, pos).get<1>()) {
 282                         if (fitCursor())
 283                                 updateMetrics(false);
 284                 }
 285         }
 286
 287         if (tolastfiles)
 288                 LyX::ref().session().lastFiles().add(FileName(b->fileName()));
 289
 290         return true;
 291 }
 292
 293
 294 void BufferView::resize()
 295 {
 296         if (!buffer_)
 297                 return;
 298
 299         lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION << endl;
 300
 301         updateMetrics(false);
 302         switchKeyMap();
 303 }
 304
 305
 306 bool BufferView::fitCursor()
 307 {
 308         if (bv_funcs::status(this, cursor_) == bv_funcs::CUR_INSIDE) {
 309                 frontend::FontMetrics const & fm =
 310                         theFontMetrics(cursor_.getFont());
 311                 int const asc = fm.maxAscent();
 312                 int const des = fm.maxDescent();
 313                 Point const p = bv_funcs::getPos(*this, cursor_, cursor_.boundary());
 314                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 315                         return false;
 316         }
 317         center();
 318         return true;
 319 }
 320
 321
 322 bool BufferView::multiParSel()
 323 {
 324         if (!cursor_.selection())
 325                 return false;
 326         bool ret = multiparsel_cache_;
 327         multiparsel_cache_ = cursor_.selBegin().pit() != cursor_.selEnd().pit();
 328         // Either this, or previous selection spans paragraphs
 329         return ret || multiparsel_cache_;
 330 }
 331
 332
 333 bool BufferView::update(Update::flags flags)
 334 {
 335         // last_inset_ points to the last visited inset. This pointer may become
 336         // invalid because of keyboard editing. Since all such operations
 337         // causes screen update(), I reset last_inset_ to avoid such a problem.
 338         last_inset_ = 0;
 339         // This is close to a hot-path.
 340         if (lyxerr.debugging(Debug::DEBUG)) {
 341                 lyxerr[Debug::DEBUG]
 342                         << BOOST_CURRENT_FUNCTION
 343                         << "[fitcursor = " << (flags & Update::FitCursor)
 344                         << ", forceupdate = " << (flags & Update::Force)
 345                         << ", singlepar = " << (flags & Update::SinglePar)
 346                         << "]  buffer: " << buffer_ << endl;
 347         }
 348
 349         // Check needed to survive LyX startup
 350         if (!buffer_)
 351                 return false;
 352
 353         if (lyxerr.debugging(Debug::WORKAREA)) {
 354                 lyxerr[Debug::WORKAREA] << "BufferView::update" << std::endl;
 355         }
 356
 357         // Update macro store
 358         buffer_->buildMacros();
 359
 360         // Now do the first drawing step if needed. This consists on updating
 361         // the CoordCache in updateMetrics().
 362         // The second drawing step is done in WorkArea::redraw() if needed.
 363
 364         // Case when no explicit update is requested.
 365         if (!flags) {
 366                 // no need to redraw anything.
 367                 metrics_info_.update_strategy = NoScreenUpdate;
 368                 return false;
 369         }
 370
 371         if (flags == Update::Decoration) {
 372                 metrics_info_.update_strategy = DecorationUpdate;
 373                 return true;
 374         }
 375
 376         if (flags == Update::FitCursor
 377                 || flags == (Update::Decoration | Update::FitCursor)) {
 378                 bool const fit_cursor = fitCursor();
 379                 // tell the frontend to update the screen if needed.
 380                 if (fit_cursor) {
 381                         updateMetrics(false);
 382                         return true;
 383                 }
 384                 if (flags & Update::Decoration) {
 385                         metrics_info_.update_strategy = DecorationUpdate;
 386                         return true;
 387                 }
 388                 // no screen update is needed.
 389                 metrics_info_.update_strategy = NoScreenUpdate;
 390                 return false;
 391         }
 392
 393         bool full_metrics = flags & Update::Force;
 394         if (flags & Update::MultiParSel)
 395                 full_metrics |= multiParSel();
 396
 397         bool const single_par = !full_metrics;
 398         updateMetrics(single_par);
 399
 400         if (flags & Update::FitCursor && fitCursor())
 401                 updateMetrics(false);
 402
 403         // tell the frontend to update the screen.
 404         return true;
 405 }
 406
 407
 408 void BufferView::updateScrollbar()
 409 {
 410         if (!buffer_) {
 411                 lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION
 412                                      << " no text in updateScrollbar" << endl;
 413                 scrollbarParameters_.reset();
 414                 return;
 415         }
 416
 417         LyXText & t = buffer_->text();
 418         TextMetrics & tm = text_metrics_[&t];
 419
 420         int const parsize = int(t.paragraphs().size() - 1);
 421         if (anchor_ref_ >  parsize)  {
 422                 anchor_ref_ = parsize;
 423                 offset_ref_ = 0;
 424         }
 425
 426         if (lyxerr.debugging(Debug::GUI)) {
 427                 lyxerr[Debug::GUI]
 428                         << BOOST_CURRENT_FUNCTION
 429                         << " Updating scrollbar: height: " << t.paragraphs().size()
 430                         << " curr par: " << cursor_.bottom().pit()
 431                         << " default height " << defaultRowHeight() << endl;
 432         }
 433
 434         // It would be better to fix the scrollbar to understand
 435         // values in [0..1] and divide everything by wh
 436
 437         // estimated average paragraph height:
 438         if (wh_ == 0)
 439                 wh_ = height_ / 4;
 440
 441         int h = tm.parMetrics(anchor_ref_).height();
 442
 443         // Normalize anchor/offset (MV):
 444         while (offset_ref_ > h && anchor_ref_ < parsize) {
 445                 anchor_ref_++;
 446                 offset_ref_ -= h;
 447                 h = tm.parMetrics(anchor_ref_).height();
 448         }
 449         // Look at paragraph heights on-screen
 450         int sumh = 0;
 451         int nh = 0;
 452         for (pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 453                 if (sumh > height_)
 454                         break;
 455                 int const h2 = tm.parMetrics(pit).height();
 456                 sumh += h2;
 457                 nh++;
 458         }
 459
 460         BOOST_ASSERT(nh);
 461         int const hav = sumh / nh;
 462         // More realistic average paragraph height
 463         if (hav > wh_)
 464                 wh_ = hav;
 465
 466         BOOST_ASSERT(h);
 467         scrollbarParameters_.height = (parsize + 1) * wh_;
 468         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 469         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 470 }
 471
 472
 473 ScrollbarParameters const & BufferView::scrollbarParameters() const
 474 {
 475         return scrollbarParameters_;
 476 }
 477
 478
 479 void BufferView::scrollDocView(int value)
 480 {
 481         lyxerr[Debug::GUI] << BOOST_CURRENT_FUNCTION
 482                            << "[ value = " << value << "]" << endl;
 483
 484         if (!buffer_)
 485                 return;
 486
 487         LyXText & t = buffer_->text();
 488         TextMetrics & tm = text_metrics_[&t];
 489
 490         float const bar = value / float(wh_ * t.paragraphs().size());
 491
 492         anchor_ref_ = int(bar * t.paragraphs().size());
 493         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 494                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 495
 496         tm.redoParagraph(anchor_ref_);
 497         int const h = tm.parMetrics(anchor_ref_).height();
 498         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 499         updateMetrics(false);
 500 }
 501
 502
 503 void BufferView::setCursorFromScrollbar()
 504 {
 505         LyXText & t = buffer_->text();
 506
 507         int const height = 2 * defaultRowHeight();
 508         int const first = height;
 509         int const last = height_ - height;
 510         LCursor & cur = cursor_;
 511
 512         bv_funcs::CurStatus st = bv_funcs::status(this, cur);
 513
 514         switch (st) {
 515         case bv_funcs::CUR_ABOVE:
 516                 // We reset the cursor because bv_funcs::status() does not
 517                 // work when the cursor is within mathed.
 518                 cur.reset(buffer_->inset());
 519                 t.setCursorFromCoordinates(cur, 0, first);
 520                 cur.clearSelection();
 521                 break;
 522         case bv_funcs::CUR_BELOW:
 523                 // We reset the cursor because bv_funcs::status() does not
 524                 // work when the cursor is within mathed.
 525                 cur.reset(buffer_->inset());
 526                 t.setCursorFromCoordinates(cur, 0, last);
 527                 cur.clearSelection();
 528                 break;
 529         case bv_funcs::CUR_INSIDE:
 530                 int const y = bv_funcs::getPos(*this, cur, cur.boundary()).y_;
 531                 int const newy = min(last, max(y, first));
 532                 if (y != newy) {
 533                         cur.reset(buffer_->inset());
 534                         t.setCursorFromCoordinates(cur, 0, newy);
 535                 }
 536         }
 537 }
 538
 539
 540 Change const BufferView::getCurrentChange() const
 541 {
 542         if (!cursor_.selection())
 543                 return Change(Change::UNCHANGED);
 544
 545         DocIterator dit = cursor_.selectionBegin();
 546         return dit.paragraph().lookupChange(dit.pos());
 547 }
 548
 549
 550 void BufferView::saveBookmark(bool persistent)
 551 {
 552         LyX::ref().session().bookmarks().save(
 553                 FileName(buffer_->fileName()),
 554                 cursor_.pit(),
 555                 cursor_.paragraph().id(),
 556                 cursor_.pos(),
 557                 persistent
 558         );
 559         if (persistent)
 560                 // emit message signal.
 561                 message(_("Save bookmark"));
 562 }
 563
 564
 565 boost::tuple<pit_type, int> BufferView::moveToPosition(pit_type par_pit, int par_id, pos_type par_pos)
 566 {
 567         cursor_.clearSelection();
 568
 569         // if a valid par_id is given, try it first
 570         if (par_id > 0) {
 571                 ParIterator par = buffer_->getParFromID(par_id);
 572                 if (par != buffer_->par_iterator_end()) {
 573                         setCursor(makeDocIterator(par, min(par->size(), par_pos)));
 574                         return boost::make_tuple(cursor_.pit(), par_id);
 575                 }
 576         }
 577         // if par_id == 0, or searching through par_id failed
 578         if (static_cast<size_t>(par_pit) < buffer_->paragraphs().size()) {
 579                 ParIterator it = buffer_->par_iterator_begin();
 580                 ParIterator const end = buffer_->par_iterator_end();
 581                 for (; it != end; ++it)
 582                         if (it.pit() == par_pit) {
 583                                 // restored pos may be bigger than it->size
 584                                 setCursor(makeDocIterator(it, min(par_pos, it->size())));
 585                                 return boost::make_tuple(par_pit, it->id());
 586                         }
 587         }
 588         // both methods fail
 589         return boost::make_tuple(pit_type(0), 0);
 590 }
 591
 592
 593 void BufferView::switchKeyMap()
 594 {
 595         if (!lyxrc.rtl_support)
 596                 return;
 597
 598         if (getLyXText()->real_current_font.isRightToLeft()) {
 599                 if (intl_->keymap == Intl::PRIMARY)
 600                         intl_->keyMapSec();
 601         } else {
 602                 if (intl_->keymap == Intl::SECONDARY)
 603                         intl_->keyMapPrim();
 604         }
 605 }
 606
 607
 608 int BufferView::workWidth() const
 609 {
 610         return width_;
 611 }
 612
 613
 614 void BufferView::center()
 615 {
 616         CursorSlice & bot = cursor_.bottom();
 617         TextMetrics & tm = text_metrics_[bot.text()];
 618         pit_type const pit = bot.pit();
 619         tm.redoParagraph(pit);
 620         ParagraphMetrics const & pm = tm.parMetrics(pit);
 621         anchor_ref_ = pit;
 622         offset_ref_ = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary()).y_
 623                 + pm.ascent() - height_ / 2;
 624 }
 625
 626
 627 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 628 {
 629         FuncStatus flag;
 630
 631         switch (cmd.action) {
 632
 633         case LFUN_UNDO:
 634                 flag.enabled(!buffer_->undostack().empty());
 635                 break;
 636         case LFUN_REDO:
 637                 flag.enabled(!buffer_->redostack().empty());
 638                 break;
 639         case LFUN_FILE_INSERT:
 640         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 641         case LFUN_FILE_INSERT_PLAINTEXT:
 642         case LFUN_BOOKMARK_SAVE:
 643                 // FIXME: Actually, these LFUNS should be moved to LyXText
 644                 flag.enabled(cursor_.inTexted());
 645                 break;
 646         case LFUN_FONT_STATE:
 647         case LFUN_LABEL_INSERT:
 648         case LFUN_PARAGRAPH_GOTO:
 649         // FIXME handle non-trivially
 650         case LFUN_OUTLINE_UP:
 651         case LFUN_OUTLINE_DOWN:
 652         case LFUN_OUTLINE_IN:
 653         case LFUN_OUTLINE_OUT:
 654         case LFUN_NOTE_NEXT:
 655         case LFUN_REFERENCE_NEXT:
 656         case LFUN_WORD_FIND:
 657         case LFUN_WORD_REPLACE:
 658         case LFUN_MARK_OFF:
 659         case LFUN_MARK_ON:
 660         case LFUN_MARK_TOGGLE:
 661         case LFUN_SCREEN_RECENTER:
 662         case LFUN_BIBTEX_DATABASE_ADD:
 663         case LFUN_BIBTEX_DATABASE_DEL:
 664         case LFUN_WORDS_COUNT:
 665         case LFUN_NEXT_INSET_TOGGLE:
 666                 flag.enabled(true);
 667                 break;
 668
 669         case LFUN_LABEL_GOTO: {
 670                 flag.enabled(!cmd.argument().empty()
 671                     || getInsetByCode<InsetRef>(cursor_, InsetBase::REF_CODE));
 672                 break;
 673         }
 674
 675         case LFUN_CHANGES_TRACK:
 676                 flag.enabled(true);
 677                 flag.setOnOff(buffer_->params().trackChanges);
 678                 break;
 679
 680         case LFUN_CHANGES_OUTPUT: {
 681                 OutputParams runparams;
 682                 LaTeXFeatures features(*buffer_, buffer_->params(), runparams);
 683                 flag.enabled(buffer_ && features.isAvailable("dvipost"));
 684                 flag.setOnOff(buffer_->params().outputChanges);
 685                 break;
 686         }
 687
 688         case LFUN_CHANGES_MERGE:
 689         case LFUN_CHANGE_NEXT:
 690         case LFUN_ALL_CHANGES_ACCEPT:
 691         case LFUN_ALL_CHANGES_REJECT:
 692                 // TODO: context-sensitive enabling of LFUNs
 693                 // In principle, these command should only be enabled if there
 694                 // is a change in the document. However, without proper
 695                 // optimizations, this will inevitably result in poor performance.
 696                 flag.enabled(buffer_);
 697                 break;
 698
 699         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 700                 flag.setOnOff(buffer_->params().compressed);
 701                 break;
 702         }
 703
 704         default:
 705                 flag.enabled(false);
 706         }
 707
 708         return flag;
 709 }
 710
 711
 712 Update::flags BufferView::dispatch(FuncRequest const & cmd)
 713 {
 714         //lyxerr << BOOST_CURRENT_FUNCTION
 715         //       << [ cmd = " << cmd << "]" << endl;
 716
 717         // Make sure that the cached BufferView is correct.
 718         lyxerr[Debug::ACTION] << BOOST_CURRENT_FUNCTION
 719                 << " action[" << cmd.action << ']'
 720                 << " arg[" << to_utf8(cmd.argument()) << ']'
 721                 << " x[" << cmd.x << ']'
 722                 << " y[" << cmd.y << ']'
 723                 << " button[" << cmd.button() << ']'
 724                 << endl;
 725
 726         // FIXME: this should not be possible.
 727         if (!buffer_)
 728                 return Update::None;
 729
 730         LCursor & cur = cursor_;
 731         // Default Update flags.
 732         Update::flags updateFlags = Update::Force | Update::FitCursor;
 733
 734         switch (cmd.action) {
 735
 736         case LFUN_UNDO:
 737                 cur.message(_("Undo"));
 738                 cur.clearSelection();
 739                 if (!textUndo(*this)) {
 740                         cur.message(_("No further undo information"));
 741                         updateFlags = Update::None;
 742                 }
 743                 switchKeyMap();
 744                 break;
 745
 746         case LFUN_REDO:
 747                 cur.message(_("Redo"));
 748                 cur.clearSelection();
 749                 if (!textRedo(*this)) {
 750                         cur.message(_("No further redo information"));
 751                         updateFlags = Update::None;
 752                 }
 753                 switchKeyMap();
 754                 break;
 755
 756         case LFUN_FILE_INSERT:
 757                 // FIXME UNICODE
 758                 menuInsertLyXFile(to_utf8(cmd.argument()));
 759                 break;
 760
 761         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 762                 // FIXME UNICODE
 763                 insertPlaintextFile(this, to_utf8(cmd.argument()), true);
 764                 break;
 765
 766         case LFUN_FILE_INSERT_PLAINTEXT:
 767                 // FIXME UNICODE
 768                 insertPlaintextFile(this, to_utf8(cmd.argument()), false);
 769                 break;
 770
 771         case LFUN_FONT_STATE:
 772                 cur.message(cur.currentState());
 773                 break;
 774
 775         case LFUN_BOOKMARK_SAVE:
 776                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 777                 break;
 778
 779         case LFUN_LABEL_GOTO: {
 780                 docstring label = cmd.argument();
 781                 if (label.empty()) {
 782                         InsetRef * inset =
 783                                 getInsetByCode<InsetRef>(cursor_,
 784                                                          InsetBase::REF_CODE);
 785                         if (inset) {
 786                                 label = inset->getParam("reference");
 787                                 // persistent=false: use temp_bookmark
 788                                 saveBookmark(false);
 789                         }
 790                 }
 791
 792                 if (!label.empty())
 793                         gotoLabel(label);
 794                 break;
 795         }
 796
 797         case LFUN_PARAGRAPH_GOTO: {
 798                 int const id = convert<int>(to_utf8(cmd.argument()));
 799                 int i = 0;
 800                 for (Buffer * b = buffer_; i == 0 || b != buffer_; b = theBufferList().next(b)) {
 801                         ParIterator par = b->getParFromID(id);
 802                         if (par == b->par_iterator_end()) {
 803                                 lyxerr[Debug::INFO]
 804                                         << "No matching paragraph found! ["
 805                                         << id << "]." << endl;
 806                         } else {
 807                                 lyxerr[Debug::INFO]
 808                                         << "Paragraph " << par->id()
 809                                         << " found in buffer `"
 810                                         << b->fileName() << "'." << endl;
 811
 812                                 if (b == buffer_) {
 813                                         // Set the cursor
 814                                         setCursor(makeDocIterator(par, 0));
 815                                         switchKeyMap();
 816                                 } else {
 817                                         // Switch to other buffer view and resend cmd
 818                                         theLyXFunc().dispatch(FuncRequest(
 819                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 820                                         theLyXFunc().dispatch(cmd);
 821                                         updateFlags = Update::None;
 822                                 }
 823                                 break;
 824                         }
 825                         ++i;
 826                 }
 827                 break;
 828         }
 829
 830         case LFUN_OUTLINE_UP:
 831                 toc::outline(toc::Up, cursor_);
 832                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 833                 updateLabels(*buffer_);
 834                 break;
 835         case LFUN_OUTLINE_DOWN:
 836                 toc::outline(toc::Down, cursor_);
 837                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 838                 updateLabels(*buffer_);
 839                 break;
 840         case LFUN_OUTLINE_IN:
 841                 toc::outline(toc::In, cursor_);
 842                 updateLabels(*buffer_);
 843                 break;
 844         case LFUN_OUTLINE_OUT:
 845                 toc::outline(toc::Out, cursor_);
 846                 updateLabels(*buffer_);
 847                 break;
 848
 849         case LFUN_NOTE_NEXT:
 850                 bv_funcs::gotoInset(this, InsetBase::NOTE_CODE, false);
 851                 break;
 852
 853         case LFUN_REFERENCE_NEXT: {
 854                 vector<InsetBase_code> tmp;
 855                 tmp.push_back(InsetBase::LABEL_CODE);
 856                 tmp.push_back(InsetBase::REF_CODE);
 857                 bv_funcs::gotoInset(this, tmp, true);
 858                 break;
 859         }
 860
 861         case LFUN_CHANGES_TRACK:
 862                 buffer_->params().trackChanges = !buffer_->params().trackChanges;
 863                 break;
 864
 865         case LFUN_CHANGES_OUTPUT:
 866                 buffer_->params().outputChanges = !buffer_->params().outputChanges;
 867                 break;
 868
 869         case LFUN_CHANGE_NEXT:
 870                 findNextChange(this);
 871                 break;
 872
 873         case LFUN_CHANGES_MERGE:
 874                 if (findNextChange(this))
 875                         showDialog("changes");
 876                 break;
 877
 878         case LFUN_ALL_CHANGES_ACCEPT: {
 879                 cursor_.reset(buffer_->inset());
 880 #ifdef WITH_WARNINGS
 881 #warning FIXME changes
 882 #endif
 883                 while (findNextChange(this))
 884                         getLyXText()->acceptOrRejectChanges(cursor_, LyXText::ACCEPT);
 885                 break;
 886         }
 887
 888         case LFUN_ALL_CHANGES_REJECT: {
 889                 cursor_.reset(buffer_->inset());
 890 #ifdef WITH_WARNINGS
 891 #warning FIXME changes
 892 #endif
 893                 while (findNextChange(this))
 894                         getLyXText()->acceptOrRejectChanges(cursor_, LyXText::REJECT);
 895                 break;
 896         }
 897
 898         case LFUN_WORD_FIND:
 899                 find(this, cmd);
 900                 break;
 901
 902         case LFUN_WORD_REPLACE:
 903                 replace(this, cmd);
 904                 break;
 905
 906         case LFUN_MARK_OFF:
 907                 cur.clearSelection();
 908                 cur.resetAnchor();
 909                 cur.message(from_utf8(N_("Mark off")));
 910                 break;
 911
 912         case LFUN_MARK_ON:
 913                 cur.clearSelection();
 914                 cur.mark() = true;
 915                 cur.resetAnchor();
 916                 cur.message(from_utf8(N_("Mark on")));
 917                 break;
 918
 919         case LFUN_MARK_TOGGLE:
 920                 cur.clearSelection();
 921                 if (cur.mark()) {
 922                         cur.mark() = false;
 923                         cur.message(from_utf8(N_("Mark removed")));
 924                 } else {
 925                         cur.mark() = true;
 926                         cur.message(from_utf8(N_("Mark set")));
 927                 }
 928                 cur.resetAnchor();
 929                 break;
 930
 931         case LFUN_SCREEN_RECENTER:
 932                 center();
 933                 break;
 934
 935         case LFUN_BIBTEX_DATABASE_ADD: {
 936                 LCursor tmpcur = cursor_;
 937                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 938                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 939                                                 InsetBase::BIBTEX_CODE);
 940                 if (inset) {
 941                         if (inset->addDatabase(to_utf8(cmd.argument())))
 942                                 buffer_->updateBibfilesCache();
 943                 }
 944                 break;
 945         }
 946
 947         case LFUN_BIBTEX_DATABASE_DEL: {
 948                 LCursor tmpcur = cursor_;
 949                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 950                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 951                                                 InsetBase::BIBTEX_CODE);
 952                 if (inset) {
 953                         if (inset->delDatabase(to_utf8(cmd.argument())))
 954                                 buffer_->updateBibfilesCache();
 955                 }
 956                 break;
 957         }
 958
 959         case LFUN_WORDS_COUNT: {
 960                 DocIterator from, to;
 961                 if (cur.selection()) {
 962                         from = cur.selectionBegin();
 963                         to = cur.selectionEnd();
 964                 } else {
 965                         from = doc_iterator_begin(buffer_->inset());
 966                         to = doc_iterator_end(buffer_->inset());
 967                 }
 968                 int const count = countWords(from, to);
 969                 docstring message;
 970                 if (count != 1) {
 971                         if (cur.selection())
 972                                 message = bformat(_("%1$d words in selection."),
 973                                           count);
 974                                 else
 975                                         message = bformat(_("%1$d words in document."),
 976                                                           count);
 977                 }
 978                 else {
 979                         if (cur.selection())
 980                                 message = _("One word in selection.");
 981                         else
 982                                 message = _("One word in document.");
 983                 }
 984
 985                 Alert::information(_("Count words"), message);
 986         }
 987                 break;
 988
 989         case LFUN_BUFFER_TOGGLE_COMPRESSION:
 990                 // turn compression on/off
 991                 buffer_->params().compressed = !buffer_->params().compressed;
 992                 break;
 993
 994         case LFUN_NEXT_INSET_TOGGLE: {
 995                 // this is the real function we want to invoke
 996                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
 997                 // if there is an inset at cursor, see whether it
 998                 // wants to toggle.
 999                 InsetBase * inset = cur.nextInset();
1000                 if (inset && inset->isActive()) {
1001                         LCursor tmpcur = cur;
1002                         tmpcur.pushLeft(*inset);
1003                         inset->dispatch(tmpcur, tmpcmd);
1004                         if (tmpcur.result().dispatched()) {
1005                                 cur.dispatched();
1006                         }
1007                 }
1008                 // if it did not work, try the underlying inset.
1009                 if (!cur.result().dispatched())
1010                         cur.dispatch(tmpcmd);
1011
1012                 if (cur.result().dispatched())
1013                         cur.clearSelection();
1014
1015                 break;
1016         }
1017
1018         default:
1019                 updateFlags = Update::None;
1020         }
1021
1022         return updateFlags;
1023 }
1024
1025
1026 docstring const BufferView::requestSelection()
1027 {
1028         if (!buffer_)
1029                 return docstring();
1030
1031         LCursor & cur = cursor_;
1032
1033         if (!cur.selection()) {
1034                 xsel_cache_.set = false;
1035                 return docstring();
1036         }
1037
1038         if (!xsel_cache_.set ||
1039             cur.top() != xsel_cache_.cursor ||
1040             cur.anchor_.top() != xsel_cache_.anchor)
1041         {
1042                 xsel_cache_.cursor = cur.top();
1043                 xsel_cache_.anchor = cur.anchor_.top();
1044                 xsel_cache_.set = cur.selection();
1045                 return cur.selectionAsString(false);
1046         }
1047         return docstring();
1048 }
1049
1050
1051 void BufferView::clearSelection()
1052 {
1053         if (buffer_) {
1054                 cursor_.clearSelection();
1055                 xsel_cache_.set = false;
1056                 // The buffer did not really change, but this causes the
1057                 // redraw we need because we cleared the selection above.
1058                 buffer_->changed();
1059         }
1060 }
1061
1062
1063 void BufferView::workAreaResize(int width, int height)
1064 {
1065         // Update from work area
1066         width_ = width;
1067         height_ = height;
1068
1069         // The complete text metrics will be redone.
1070         text_metrics_.clear();
1071
1072         if (buffer_)
1073                 resize();
1074 }
1075
1076
1077 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
1078 {
1079         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1080
1081         // This is only called for mouse related events including
1082         // LFUN_FILE_OPEN generated by drag-and-drop.
1083         FuncRequest cmd = cmd0;
1084
1085         // E.g. Qt mouse press when no buffer
1086         if (!buffer_)
1087                 return false;
1088
1089         LCursor cur(*this);
1090         cur.push(buffer_->inset());
1091         cur.selection() = cursor_.selection();
1092
1093         // Either the inset under the cursor or the
1094         // surrounding LyXText will handle this event.
1095
1096         // Build temporary cursor.
1097         cmd.y = min(max(cmd.y, -1), height_);
1098         InsetBase * inset = buffer_->text().editXY(cur, cmd.x, cmd.y);
1099
1100         //lyxerr << BOOST_CURRENT_FUNCTION
1101         //       << " * hit inset at tip: " << inset << endl;
1102         //lyxerr << BOOST_CURRENT_FUNCTION
1103         //       << " * created temp cursor:" << cur << endl;
1104
1105         // NOTE: editXY returns the top level inset of nested insets. If you happen
1106         // to move from a text (inset=0) to a text inside an inset (e.g. an opened
1107         // footnote inset, again inset=0), that inset will not be redrawn.
1108         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1109                 bool need_redraw = false;
1110
1111                 if (inset != last_inset_) {
1112                         if (last_inset_)
1113                                 need_redraw |= last_inset_->setMouseHover(false);
1114                         if (inset)
1115                                 need_redraw |= inset->setMouseHover(true);
1116                         last_inset_ = inset;
1117                 }
1118
1119                 // if last metrics update was in singlepar mode, WorkArea::redraw() will
1120                 // not expose the button for redraw. We adjust here the metrics dimension
1121                 // to enable a full redraw.
1122                 // FIXME: It is possible to redraw only the area around the button!
1123                 if (need_redraw
1124                         && metrics_info_.update_strategy == SingleParUpdate) {
1125                         // FIXME: It should be possible to redraw only the area around
1126                         // the button by doing this:
1127                         //
1128                         //metrics_info_.singlepar = false;
1129                         //metrics_info_.y1 = ymin of button;
1130                         //metrics_info_.y2 = ymax of button;
1131                         //
1132                         // Unfortunately, rowpainter.C:paintText() does not distinguish
1133                         // between background updates and text updates. So we use the hammer
1134                         // solution for now. We could also avoid the updateMetrics() below
1135                         // by using the first and last pit of the CoordCache. Have a look
1136                         // at LyXText::getPitNearY() to see what I mean.
1137                         //
1138                         //metrics_info_.pit1 = first pit of CoordCache;
1139                         //metrics_info_.pit2 = last pit of CoordCache;
1140                         //metrics_info_.singlepar = false;
1141                         //metrics_info_.y1 = 0;
1142                         //metrics_info_.y2 = height_;
1143                         //
1144                         updateMetrics(false);
1145                 }
1146
1147                 // This event (moving without mouse click) is not passed further.
1148                 // This should be changed if it is further utilized.
1149                 return need_redraw;
1150         }
1151
1152         // Put anchor at the same position.
1153         cur.resetAnchor();
1154
1155         // Try to dispatch to an non-editable inset near this position
1156         // via the temp cursor. If the inset wishes to change the real
1157         // cursor it has to do so explicitly by using
1158         //  cur.bv().cursor() = cur;  (or similar)
1159         if (inset) {
1160                 inset->dispatch(cur, cmd);
1161         }
1162
1163         // Now dispatch to the temporary cursor. If the real cursor should
1164         // be modified, the inset's dispatch has to do so explicitly.
1165         if (!cur.result().dispatched())
1166                 cur.dispatch(cmd);
1167
1168         // Redraw if requested and necessary.
1169         if (cur.result().dispatched() && cur.result().update())
1170                 return update(cur.result().update());
1171
1172         return false;
1173 }
1174
1175
1176 void BufferView::scroll(int /*lines*/)
1177 {
1178 //      if (!buffer_)
1179 //              return;
1180 //
1181 //      LyXText const * t = &buffer_->text();
1182 //      int const line_height = defaultRowHeight();
1183 //
1184 //      // The new absolute coordinate
1185 //      int new_top_y = top_y() + lines * line_height;
1186 //
1187 //      // Restrict to a valid value
1188 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
1189 //      new_top_y = std::max(0, new_top_y);
1190 //
1191 //      scrollDocView(new_top_y);
1192 //
1193 }
1194
1195
1196 void BufferView::setCursorFromRow(int row)
1197 {
1198         int tmpid = -1;
1199         int tmppos = -1;
1200
1201         buffer_->texrow().getIdFromRow(row, tmpid, tmppos);
1202
1203         if (tmpid == -1)
1204                 buffer_->text().setCursor(cursor_, 0, 0);
1205         else
1206                 buffer_->text().setCursor(cursor_, buffer_->getParFromID(tmpid).pit(), tmppos);
1207 }
1208
1209
1210 void BufferView::gotoLabel(docstring const & label)
1211 {
1212         for (InsetIterator it = inset_iterator_begin(buffer_->inset()); it; ++it) {
1213                 vector<docstring> labels;
1214                 it->getLabelList(*buffer_, labels);
1215                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1216                         setCursor(it);
1217                         update();
1218                         return;
1219                 }
1220         }
1221 }
1222
1223
1224 LyXText * BufferView::getLyXText()
1225 {
1226         LyXText * text = cursor_.innerText();
1227         BOOST_ASSERT(text);
1228         return text;
1229 }
1230
1231
1232 LyXText const * BufferView::getLyXText() const
1233 {
1234         LyXText const * text = cursor_.innerText();
1235         BOOST_ASSERT(text);
1236         return text;
1237 }
1238
1239
1240 TextMetrics const & BufferView::textMetrics(LyXText const * t) const
1241 {
1242         return const_cast<BufferView *>(this)->textMetrics(t);
1243 }
1244
1245
1246 TextMetrics & BufferView::textMetrics(LyXText const * t)
1247 {
1248         TextMetricsCache::iterator tmc_it  = text_metrics_.find(t);
1249         if (tmc_it == text_metrics_.end()) {
1250                 tmc_it = text_metrics_.insert(
1251                         make_pair(t, TextMetrics(this, const_cast<LyXText *>(t)))).first;
1252         }
1253         return tmc_it->second;
1254 }
1255
1256
1257 ParagraphMetrics const & BufferView::parMetrics(LyXText const * t,
1258                 pit_type pit) const
1259 {
1260         return textMetrics(t).parMetrics(pit);
1261 }
1262
1263
1264 int BufferView::workHeight() const
1265 {
1266         return height_;
1267 }
1268
1269
1270 void BufferView::setCursor(DocIterator const & dit)
1271 {
1272         size_t const n = dit.depth();
1273         for (size_t i = 0; i < n; ++i)
1274                 dit[i].inset().edit(cursor_, true);
1275
1276         cursor_.setCursor(dit);
1277         cursor_.selection() = false;
1278 }
1279
1280
1281 bool BufferView::checkDepm(LCursor & cur, LCursor & old)
1282 {
1283         // Would be wrong to delete anything if we have a selection.
1284         if (cur.selection())
1285                 return false;
1286
1287         bool need_anchor_change = false;
1288         bool changed = cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1289                 need_anchor_change);
1290
1291         if (need_anchor_change)
1292                 cur.resetAnchor();
1293
1294         if (!changed)
1295                 return false;
1296
1297         updateMetrics(false);
1298         buffer_->changed();
1299         return true;
1300 }
1301
1302
1303 bool BufferView::mouseSetCursor(LCursor & cur)
1304 {
1305         BOOST_ASSERT(&cur.bv() == this);
1306
1307         // Has the cursor just left the inset?
1308         bool badcursor = false;
1309         if (&cursor_.inset() != &cur.inset())
1310                 badcursor = cursor_.inset().notifyCursorLeaves(cursor_);
1311
1312         // do the dEPM magic if needed
1313         // FIXME: move this to InsetText::notifyCursorLeaves?
1314         bool update = false;
1315         if (!badcursor && cursor_.inTexted())
1316                 checkDepm(cur, cursor_);
1317
1318         // if the cursor was in an empty script inset and the new
1319         // position is in the nucleus of the inset, notifyCursorLeaves
1320         // will kill the script inset itself. So we check all the
1321         // elements of the cursor to make sure that they are correct.
1322         // For an example, see bug 2933:
1323         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1324         // The code below could maybe be moved to a DocIterator method.
1325         //lyxerr << "cur before " << cur <<std::endl;
1326         DocIterator dit(cur.inset());
1327         dit.push_back(cur.bottom());
1328         size_t i = 1;
1329         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1330                 dit.push_back(cur[i]);
1331                 ++i;
1332         }
1333         //lyxerr << "5 cur after" << dit <<std::endl;
1334
1335         cursor_.setCursor(dit);
1336         cursor_.clearSelection();
1337         // remember new position.
1338         cursor_.setTargetX();
1339         finishUndo();
1340         return update;
1341 }
1342
1343
1344 void BufferView::putSelectionAt(DocIterator const & cur,
1345                                 int length, bool backwards)
1346 {
1347         cursor_.clearSelection();
1348
1349         setCursor(cur);
1350
1351         if (length) {
1352                 if (backwards) {
1353                         cursor_.pos() += length;
1354                         cursor_.setSelection(cursor_, -length);
1355                 } else
1356                         cursor_.setSelection(cursor_, length);
1357                 theSelection().haveSelection(cursor_.selection());
1358         }
1359 }
1360
1361
1362 LCursor & BufferView::cursor()
1363 {
1364         return cursor_;
1365 }
1366
1367
1368 LCursor const & BufferView::cursor() const
1369 {
1370         return cursor_;
1371 }
1372
1373
1374 pit_type BufferView::anchor_ref() const
1375 {
1376         return anchor_ref_;
1377 }
1378
1379
1380 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1381 {
1382         return metrics_info_;
1383 }
1384
1385
1386 // FIXME: We should split-up updateMetrics() for the singlepar case.
1387 void BufferView::updateMetrics(bool singlepar)
1388 {
1389         LyXText & buftext = buffer_->text();
1390         TextMetrics & tm = textMetrics(&buftext);
1391         pit_type size = int(buftext.paragraphs().size());
1392
1393         if (anchor_ref_ > int(buftext.paragraphs().size() - 1)) {
1394                 anchor_ref_ = int(buftext.paragraphs().size() - 1);
1395                 offset_ref_ = 0;
1396         }
1397
1398         // If the paragraph metrics has changed, we can not
1399         // use the singlepar optimisation.
1400         if (singlepar
1401                 // In Single Paragraph mode, rebreak only
1402                 // the (main text, not inset!) paragraph containing the cursor.
1403                 // (if this paragraph contains insets etc., rebreaking will
1404                 // recursively descend)
1405                 && tm.redoParagraph(cursor_.bottom().pit()))
1406                 singlepar = false;
1407
1408         pit_type const pit = anchor_ref_;
1409         int pit1 = pit;
1410         int pit2 = pit;
1411         size_t const npit = buftext.paragraphs().size();
1412
1413         // Rebreak anchor paragraph.
1414         if (!singlepar)
1415                 tm.redoParagraph(pit);
1416
1417         // Clear out the position cache in case of full screen redraw.
1418         if (!singlepar)
1419                 coord_cache_.clear();
1420
1421         int y0 = tm.parMetrics(pit).ascent() - offset_ref_;
1422
1423         // Redo paragraphs above anchor if necessary.
1424         int y1 = y0;
1425         while (y1 > 0 && pit1 > 0) {
1426                 y1 -= tm.parMetrics(pit1).ascent();
1427                 --pit1;
1428                 if (!singlepar)
1429                         tm.redoParagraph(pit1);
1430                 y1 -= tm.parMetrics(pit1).descent();
1431         }
1432
1433
1434         // Take care of ascent of first line
1435         y1 -= tm.parMetrics(pit1).ascent();
1436
1437         // Normalize anchor for next time
1438         anchor_ref_ = pit1;
1439         offset_ref_ = -y1;
1440
1441         // Grey at the beginning is ugly
1442         if (pit1 == 0 && y1 > 0) {
1443                 y0 -= y1;
1444                 y1 = 0;
1445                 anchor_ref_ = 0;
1446         }
1447
1448         // Redo paragraphs below the anchor if necessary.
1449         int y2 = y0;
1450         while (y2 < height_ && pit2 < int(npit) - 1) {
1451                 y2 += tm.parMetrics(pit2).descent();
1452                 ++pit2;
1453                 if (!singlepar)
1454                         tm.redoParagraph(pit2);
1455                 y2 += tm.parMetrics(pit2).ascent();
1456         }
1457
1458         // Take care of descent of last line
1459         y2 += tm.parMetrics(pit2).descent();
1460
1461         // The coordinates of all these paragraphs are correct, cache them
1462         int y = y1;
1463         CoordCache::InnerParPosCache & parPos = coord_cache_.parPos()[&buftext];
1464         for (pit_type pit = pit1; pit <= pit2; ++pit) {
1465                 ParagraphMetrics const & pm = tm.parMetrics(pit);
1466                 y += pm.ascent();
1467                 parPos[pit] = Point(0, y);
1468                 if (singlepar && pit == cursor_.bottom().pit()) {
1469                         // In Single Paragraph mode, collect here the
1470                         // y1 and y2 of the (one) paragraph the cursor is in
1471                         y1 = y - pm.ascent();
1472                         y2 = y + pm.descent();
1473                 }
1474                 y += pm.descent();
1475         }
1476
1477         if (singlepar) {
1478                 // collect cursor paragraph iter bounds
1479                 pit1 = cursor_.bottom().pit();
1480                 pit2 = cursor_.bottom().pit();
1481         }
1482
1483         lyxerr[Debug::DEBUG]
1484                 << BOOST_CURRENT_FUNCTION
1485                 << " y1: " << y1
1486                 << " y2: " << y2
1487                 << " pit1: " << pit1
1488                 << " pit2: " << pit2
1489                 << " npit: " << npit
1490                 << " singlepar: " << singlepar
1491                 << "size: " << size
1492                 << endl;
1493
1494         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2,
1495                 singlepar? SingleParUpdate: FullScreenUpdate, size);
1496
1497         if (lyxerr.debugging(Debug::WORKAREA)) {
1498                 lyxerr[Debug::WORKAREA] << "BufferView::updateMetrics" << endl;
1499                 coord_cache_.dump();
1500         }
1501 }
1502
1503
1504 void BufferView::menuInsertLyXFile(string const & filenm)
1505 {
1506         BOOST_ASSERT(cursor_.inTexted());
1507         string filename = filenm;
1508
1509         if (filename.empty()) {
1510                 // Launch a file browser
1511                 // FIXME UNICODE
1512                 string initpath = lyxrc.document_path;
1513
1514                 if (buffer_) {
1515                         string const trypath = buffer_->filePath();
1516                         // If directory is writeable, use this as default.
1517                         if (isDirWriteable(FileName(trypath)))
1518                                 initpath = trypath;
1519                 }
1520
1521                 // FIXME UNICODE
1522                 FileDialog fileDlg(_("Select LyX document to insert"),
1523                         LFUN_FILE_INSERT,
1524                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1525                         make_pair(_("Examples|#E#e"), from_utf8(addPath(package().system_support(), "examples"))));
1526
1527                 FileDialog::Result result =
1528                         fileDlg.open(from_utf8(initpath),
1529                                      FileFilterList(_("LyX Documents (*.lyx)")),
1530                                      docstring());
1531
1532                 if (result.first == FileDialog::Later)
1533                         return;
1534
1535                 // FIXME UNICODE
1536                 filename = to_utf8(result.second);
1537
1538                 // check selected filename
1539                 if (filename.empty()) {
1540                         // emit message signal.
1541                         message(_("Canceled."));
1542                         return;
1543                 }
1544         }
1545
1546         // Get absolute path of file and add ".lyx"
1547         // to the filename if necessary
1548         filename = fileSearch(string(), filename, "lyx").absFilename();
1549
1550         docstring const disp_fn = makeDisplayPath(filename);
1551         // emit message signal.
1552         message(bformat(_("Inserting document %1$s..."), disp_fn));
1553
1554         docstring res;
1555         Buffer buf("", false);
1556         if (lyx::loadLyXFile(&buf, FileName(filename))) {
1557                 ErrorList & el = buffer_->errorList("Parse");
1558                 // Copy the inserted document error list into the current buffer one.
1559                 el = buf.errorList("Parse");
1560                 recordUndo(cursor_);
1561                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1562                                              buf.params().textclass, el);
1563                 res = _("Document %1$s inserted.");
1564         } else
1565                 res = _("Could not insert document %1$s");
1566
1567         // emit message signal.
1568         message(bformat(res, disp_fn));
1569         buffer_->errors("Parse");
1570         resize();
1571 }
1572
1573 } // namespace lyx