src/BufferView.C

   1 /**
   2  * \file BufferView.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Alfredo Braunstein
   7  * \author Lars Gullik Bjønnes
   8  * \author John Levon
   9  * \author André Pönitz
  10  * \author Jürgen Vigna
  11  *
  12  * Full author contact details are available in file CREDITS.
  13  */
  14
  15 #include <config.h>
  16
  17 #include "BufferView.h"
  18
  19 #include "buffer.h"
  20 #include "buffer_funcs.h"
  21 #include "bufferlist.h"
  22 #include "bufferparams.h"
  23 #include "bufferview_funcs.h"
  24 #include "coordcache.h"
  25 #include "CutAndPaste.h"
  26 #include "debug.h"
  27 #include "dispatchresult.h"
  28 #include "errorlist.h"
  29 #include "factory.h"
  30 #include "FloatList.h"
  31 #include "funcrequest.h"
  32 #include "FuncStatus.h"
  33 #include "gettext.h"
  34 #include "intl.h"
  35 #include "insetiterator.h"
  36 #include "language.h"
  37 #include "LaTeXFeatures.h"
  38 #include "lyx_cb.h" // added for Dispatch functions
  39 #include "lyx_main.h"
  40 #include "lyxfind.h"
  41 #include "lyxfunc.h"
  42 #include "lyxlayout.h"
  43 #include "lyxtext.h"
  44 #include "lyxtextclass.h"
  45 #include "lyxrc.h"
  46 #include "session.h"
  47 #include "paragraph.h"
  48 #include "paragraph_funcs.h"
  49 #include "ParagraphParameters.h"
  50 #include "pariterator.h"
  51 #include "texrow.h"
  52 #include "toc.h"
  53 #include "undo.h"
  54 #include "vspace.h"
  55 #include "WordLangTuple.h"
  56 #include "metricsinfo.h"
  57
  58 #include "insets/insetbibtex.h"
  59 #include "insets/insetcommand.h" // ChangeRefs
  60 #include "insets/insetref.h"
  61 #include "insets/insettext.h"
  62
  63 #include "frontends/Alert.h"
  64 #include "frontends/FileDialog.h"
  65 #include "frontends/FontMetrics.h"
  66
  67 #include "graphics/Previews.h"
  68
  69 #include "support/convert.h"
  70 #include "support/filefilterlist.h"
  71 #include "support/filetools.h"
  72 #include "support/package.h"
  73 #include "support/types.h"
  74
  75 #include <boost/bind.hpp>
  76 #include <boost/current_function.hpp>
  77
  78 #include <functional>
  79 #include <vector>
  80
  81
  82 namespace lyx {
  83
  84 using support::addPath;
  85 using support::bformat;
  86 using support::FileFilterList;
  87 using support::FileName;
  88 using support::fileSearch;
  89 using support::isDirWriteable;
  90 using support::isFileReadable;
  91 using support::makeDisplayPath;
  92 using support::package;
  93
  94 using std::distance;
  95 using std::endl;
  96 using std::istringstream;
  97 using std::make_pair;
  98 using std::min;
  99 using std::max;
 100 using std::mem_fun_ref;
 101 using std::string;
 102 using std::vector;
 103
 104 namespace Alert = frontend::Alert;
 105
 106 namespace {
 107
 108 /// Return an inset of this class if it exists at the current cursor position
 109 template <class T>
 110 T * getInsetByCode(LCursor & cur, InsetBase::Code code)
 111 {
 112         T * inset = 0;
 113         DocIterator it = cur;
 114         if (it.nextInset() &&
 115             it.nextInset()->lyxCode() == code) {
 116                 inset = static_cast<T*>(it.nextInset());
 117         }
 118         return inset;
 119 }
 120
 121 } // anon namespace
 122
 123
 124 BufferView::BufferView()
 125         : width_(0), height_(0), buffer_(0), wh_(0),
 126           cursor_(*this),
 127           multiparsel_cache_(false), anchor_ref_(0), offset_ref_(0),
 128           intl_(new Intl), last_inset_(0)
 129 {
 130         xsel_cache_.set = false;
 131         intl_->initKeyMapper(lyxrc.use_kbmap);
 132 }
 133
 134
 135 BufferView::~BufferView()
 136 {
 137 }
 138
 139
 140 Buffer * BufferView::buffer() const
 141 {
 142         return buffer_;
 143 }
 144
 145
 146 void BufferView::setBuffer(Buffer * b)
 147 {
 148         LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
 149                             << "[ b = " << b << "]" << endl;
 150
 151         if (buffer_) {
 152                 // Save the actual cursor position and anchor inside the
 153                 // buffer so that it can be restored in case we rechange
 154                 // to this buffer later on.
 155                 buffer_->saveCursor(cursor_.selectionBegin(),
 156                                     cursor_.selectionEnd());
 157                 // update bookmark pit of the current buffer before switch
 158                 for (size_t i = 0; i < LyX::ref().session().bookmarks().size(); ++i) {
 159                         BookmarksSection::Bookmark const & bm = LyX::ref().session().bookmarks().bookmark(i);
 160                         if (buffer()->fileName() != bm.filename.absFilename())
 161                                 continue;
 162                         // if top_id or bottom_pit, bottom_pos has been changed, update bookmark
 163                         // see http://bugzilla.lyx.org/show_bug.cgi?id=3092
 164                         pit_type new_pit;
 165                         pos_type new_pos;
 166                         int new_id;
 167                         boost::tie(new_pit, new_pos, new_id) = moveToPosition(bm.bottom_pit, bm.bottom_pos, bm.top_id, bm.top_pos);
 168                         if (bm.bottom_pit != new_pit || bm.bottom_pos != new_pos || bm.top_id != new_id )
 169                                 const_cast<BookmarksSection::Bookmark &>(bm).updatePos(new_pit, new_pos, new_id);
 170                 }
 171                 // current buffer is going to be switched-off, save cursor pos
 172                 // Ideally, the whole cursor stack should be saved, but session
 173                 // currently can only handle bottom (whole document) level pit and pos.
 174                 // That is to say, if a cursor is in a nested inset, it will be
 175                 // restore to the left of the top level inset.
 176                 LyX::ref().session().lastFilePos().save(FileName(buffer_->fileName()),
 177                         boost::tie(cursor_.bottom().pit(), cursor_.bottom().pos()) );
 178         }
 179
 180         // If we're quitting lyx, don't bother updating stuff
 181         if (quitting) {
 182                 buffer_ = 0;
 183                 return;
 184         }
 185
 186         // If we are closing current buffer, switch to the first in
 187         // buffer list.
 188         if (!b) {
 189                 LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
 190                                     << " No Buffer!" << endl;
 191                 // We are closing the buffer, use the first buffer as current
 192                 buffer_ = theBufferList().first();
 193         } else {
 194                 // Set current buffer
 195                 buffer_ = b;
 196         }
 197
 198         // Reset old cursor
 199         cursor_ = LCursor(*this);
 200         anchor_ref_ = 0;
 201         offset_ref_ = 0;
 202
 203         if (buffer_) {
 204                 LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
 205                                     << "Buffer addr: " << buffer_ << endl;
 206                 cursor_.push(buffer_->inset());
 207                 cursor_.resetAnchor();
 208                 buffer_->text().setCurrentFont(cursor_);
 209                 if (buffer_->getCursor().size() > 0 &&
 210                     buffer_->getAnchor().size() > 0)
 211                 {
 212                         cursor_.setCursor(buffer_->getAnchor().asDocIterator(&(buffer_->inset())));
 213                         cursor_.resetAnchor();
 214                         cursor_.setCursor(buffer_->getCursor().asDocIterator(&(buffer_->inset())));
 215                         cursor_.setSelection();
 216                         // do not set selection to the new buffer because we
 217                         // only paste recent selection.
 218                 }
 219         }
 220
 221         if (buffer_)
 222                 updateMetrics(false);
 223
 224         if (buffer_ && graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 225                 graphics::Previews::get().generateBufferPreviews(*buffer_);
 226 }
 227
 228
 229 bool BufferView::loadLyXFile(FileName const & filename, bool tolastfiles)
 230 {
 231         // File already open?
 232         if (theBufferList().exists(filename.absFilename())) {
 233                 docstring const file = makeDisplayPath(filename.absFilename(), 20);
 234                 docstring text = bformat(_("The document %1$s is already "
 235                                                      "loaded.\n\nDo you want to revert "
 236                                                      "to the saved version?"), file);
 237                 int const ret = Alert::prompt(_("Revert to saved document?"),
 238                         text, 0, 1,  _("&Revert"), _("&Switch to document"));
 239
 240                 if (ret != 0) {
 241                         setBuffer(theBufferList().getBuffer(filename.absFilename()));
 242                         return true;
 243                 }
 244                 // FIXME: should be LFUN_REVERT
 245                 if (!theBufferList().close(theBufferList().getBuffer(filename.absFilename()), false))
 246                         return false;
 247                 // Fall through to new load. (Asger)
 248                 buffer_ = 0;
 249         }
 250
 251         Buffer * b = 0;
 252
 253         if (isFileReadable(filename)) {
 254                 b = theBufferList().newBuffer(filename.absFilename());
 255                 if (!lyx::loadLyXFile(b, filename)) {
 256                         theBufferList().release(b);
 257                         return false;
 258                 }
 259         } else {
 260                 docstring text = bformat(_("The document %1$s does not yet "
 261                                                      "exist.\n\nDo you want to create "
 262                                                      "a new document?"), from_utf8(filename.absFilename()));
 263                 int const ret = Alert::prompt(_("Create new document?"),
 264                          text, 0, 1, _("&Create"), _("Cancel"));
 265
 266                 if (ret == 0) {
 267                         b = newFile(filename.absFilename(), string(), true);
 268                         if (!b)
 269                                 return false;
 270                 } else
 271                         return false;
 272         }
 273
 274         setBuffer(b);
 275         // Send the "errors" signal in case of parsing errors
 276         b->errors("Parse");
 277
 278         // Update the labels and section numbering.
 279         updateLabels(*buffer_);
 280         // scroll to the position when the file was last closed
 281         if (lyxrc.use_lastfilepos) {
 282                 pit_type pit;
 283                 pos_type pos;
 284                 boost::tie(pit, pos) = LyX::ref().session().lastFilePos().load(filename);
 285                 // if successfully move to pit (returned par_id is not zero), update metrics and reset font
 286                 if (moveToPosition(pit, pos, 0, 0).get<1>()) {
 287                         if (fitCursor())
 288                                 updateMetrics(false);
 289                         buffer_->text().setCurrentFont(cursor_);
 290                 }
 291         }
 292
 293         if (tolastfiles)
 294                 LyX::ref().session().lastFiles().add(FileName(b->fileName()));
 295
 296         return true;
 297 }
 298
 299
 300 void BufferView::resize()
 301 {
 302         if (!buffer_)
 303                 return;
 304
 305         LYXERR(Debug::DEBUG) << BOOST_CURRENT_FUNCTION << endl;
 306
 307         updateMetrics(false);
 308         switchKeyMap();
 309 }
 310
 311
 312 bool BufferView::fitCursor()
 313 {
 314         if (bv_funcs::status(this, cursor_) == bv_funcs::CUR_INSIDE) {
 315                 frontend::FontMetrics const & fm =
 316                         theFontMetrics(cursor_.getFont());
 317                 int const asc = fm.maxAscent();
 318                 int const des = fm.maxDescent();
 319                 Point const p = bv_funcs::getPos(*this, cursor_, cursor_.boundary());
 320                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 321                         return false;
 322         }
 323         center();
 324         return true;
 325 }
 326
 327
 328 bool BufferView::multiParSel()
 329 {
 330         if (!cursor_.selection())
 331                 return false;
 332         bool ret = multiparsel_cache_;
 333         multiparsel_cache_ = cursor_.selBegin().pit() != cursor_.selEnd().pit();
 334         // Either this, or previous selection spans paragraphs
 335         return ret || multiparsel_cache_;
 336 }
 337
 338
 339 bool BufferView::update(Update::flags flags)
 340 {
 341         // last_inset_ points to the last visited inset. This pointer may become
 342         // invalid because of keyboard editing. Since all such operations
 343         // causes screen update(), I reset last_inset_ to avoid such a problem.
 344         last_inset_ = 0;
 345         // This is close to a hot-path.
 346         LYXERR(Debug::DEBUG)
 347                 << BOOST_CURRENT_FUNCTION
 348                 << "[fitcursor = " << (flags & Update::FitCursor)
 349                 << ", forceupdate = " << (flags & Update::Force)
 350                 << ", singlepar = " << (flags & Update::SinglePar)
 351                 << "]  buffer: " << buffer_ << endl;
 352
 353         // Check needed to survive LyX startup
 354         if (!buffer_)
 355                 return false;
 356
 357         LYXERR(Debug::WORKAREA) << "BufferView::update" << std::endl;
 358
 359         // Update macro store
 360         buffer_->buildMacros();
 361
 362         // Now do the first drawing step if needed. This consists on updating
 363         // the CoordCache in updateMetrics().
 364         // The second drawing step is done in WorkArea::redraw() if needed.
 365
 366         // Case when no explicit update is requested.
 367         if (!flags) {
 368                 // no need to redraw anything.
 369                 metrics_info_.update_strategy = NoScreenUpdate;
 370                 return false;
 371         }
 372
 373         if (flags == Update::Decoration) {
 374                 metrics_info_.update_strategy = DecorationUpdate;
 375                 return true;
 376         }
 377
 378         if (flags == Update::FitCursor
 379                 || flags == (Update::Decoration | Update::FitCursor)) {
 380                 bool const fit_cursor = fitCursor();
 381                 // tell the frontend to update the screen if needed.
 382                 if (fit_cursor) {
 383                         updateMetrics(false);
 384                         return true;
 385                 }
 386                 if (flags & Update::Decoration) {
 387                         metrics_info_.update_strategy = DecorationUpdate;
 388                         return true;
 389                 }
 390                 // no screen update is needed.
 391                 metrics_info_.update_strategy = NoScreenUpdate;
 392                 return false;
 393         }
 394
 395         bool full_metrics = flags & Update::Force;
 396         if (flags & Update::MultiParSel)
 397                 full_metrics |= multiParSel();
 398
 399         bool const single_par = !full_metrics;
 400         updateMetrics(single_par);
 401
 402         if (flags & Update::FitCursor && fitCursor())
 403                 updateMetrics(false);
 404
 405         // tell the frontend to update the screen.
 406         return true;
 407 }
 408
 409
 410 void BufferView::updateScrollbar()
 411 {
 412         if (!buffer_) {
 413                 LYXERR(Debug::DEBUG) << BOOST_CURRENT_FUNCTION
 414                                      << " no text in updateScrollbar" << endl;
 415                 scrollbarParameters_.reset();
 416                 return;
 417         }
 418
 419         LyXText & t = buffer_->text();
 420         TextMetrics & tm = text_metrics_[&t];
 421
 422         int const parsize = int(t.paragraphs().size() - 1);
 423         if (anchor_ref_ >  parsize)  {
 424                 anchor_ref_ = parsize;
 425                 offset_ref_ = 0;
 426         }
 427
 428         LYXERR(Debug::GUI)
 429                 << BOOST_CURRENT_FUNCTION
 430                 << " Updating scrollbar: height: " << t.paragraphs().size()
 431                 << " curr par: " << cursor_.bottom().pit()
 432                 << " default height " << defaultRowHeight() << endl;
 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         if (!buffer_)
 506                 return;
 507
 508         LyXText & t = buffer_->text();
 509
 510         int const height = 2 * defaultRowHeight();
 511         int const first = height;
 512         int const last = height_ - height;
 513         LCursor & cur = cursor_;
 514
 515         bv_funcs::CurStatus st = bv_funcs::status(this, cur);
 516
 517         switch (st) {
 518         case bv_funcs::CUR_ABOVE:
 519                 // We reset the cursor because bv_funcs::status() does not
 520                 // work when the cursor is within mathed.
 521                 cur.reset(buffer_->inset());
 522                 t.setCursorFromCoordinates(cur, 0, first);
 523                 cur.clearSelection();
 524                 break;
 525         case bv_funcs::CUR_BELOW:
 526                 // We reset the cursor because bv_funcs::status() does not
 527                 // work when the cursor is within mathed.
 528                 cur.reset(buffer_->inset());
 529                 t.setCursorFromCoordinates(cur, 0, last);
 530                 cur.clearSelection();
 531                 break;
 532         case bv_funcs::CUR_INSIDE:
 533                 int const y = bv_funcs::getPos(*this, cur, cur.boundary()).y_;
 534                 int const newy = min(last, max(y, first));
 535                 if (y != newy) {
 536                         cur.reset(buffer_->inset());
 537                         t.setCursorFromCoordinates(cur, 0, newy);
 538                 }
 539         }
 540 }
 541
 542
 543 Change const BufferView::getCurrentChange() const
 544 {
 545         if (!cursor_.selection())
 546                 return Change(Change::UNCHANGED);
 547
 548         DocIterator dit = cursor_.selectionBegin();
 549         return dit.paragraph().lookupChange(dit.pos());
 550 }
 551
 552
 553 void BufferView::saveBookmark(unsigned int idx)
 554 {
 555         // tenatively save bookmark, id and pos will be used to
 556         // acturately locate a bookmark in a 'live' lyx session.
 557         // pit and pos will be updated with bottom level pit/pos
 558         // when lyx exits.
 559         LyX::ref().session().bookmarks().save(
 560                 FileName(buffer_->fileName()),
 561                 cursor_.bottom().pit(),
 562                 cursor_.bottom().pos(),
 563                 cursor_.paragraph().id(),
 564                 cursor_.pos(),
 565                 idx
 566         );
 567         if (idx)
 568                 // emit message signal.
 569                 message(_("Save bookmark"));
 570 }
 571
 572
 573 boost::tuple<pit_type, pos_type, int> BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 574         int top_id, pos_type top_pos)
 575 {
 576         cursor_.clearSelection();
 577
 578         // if a valid par_id is given, try it first
 579         // This is the case for a 'live' bookmark when unique paragraph ID
 580         // is used to track bookmarks.
 581         if (top_id > 0) {
 582                 ParIterator par = buffer_->getParFromID(top_id);
 583                 if (par != buffer_->par_iterator_end()) {
 584                         DocIterator dit = makeDocIterator(par, min(par->size(), top_pos));
 585                         // Some slices of the iterator may not be reachable (e.g. closed collapsable inset)
 586                         // so the dociterator may need to be shortened. Otherwise, setCursor may
 587                         // crash lyx when the cursor can not be set to these insets.
 588                         size_t const n = dit.depth();
 589                         for (size_t i = 0; i < n; ++i)
 590                                 if (dit[i].inset().editable() != InsetBase::HIGHLY_EDITABLE) {
 591                                         dit.resize(i);
 592                                         break;
 593                                 }
 594                         setCursor(dit);
 595                         // Note: return bottom (document) level pit.
 596                         return boost::make_tuple(cursor_.bottom().pit(), cursor_.bottom().pos(), top_id);
 597                 }
 598         }
 599         // if top_id == 0, or searching through top_id failed
 600         // This is the case for a 'restored' bookmark when only bottom
 601         // (document level) pit was saved. Because of this, bookmark
 602         // restoration is inaccurate. If a bookmark was within an inset,
 603         // it will be restored to the left of the outmost inset that contains
 604         // the bookmark.
 605         if (static_cast<size_t>(bottom_pit) < buffer_->paragraphs().size()) {
 606                 ParIterator it = buffer_->par_iterator_begin();
 607                 ParIterator const end = buffer_->par_iterator_end();
 608                 for (; it != end; ++it)
 609                         if (it.pit() == bottom_pit) {
 610                                 // restored pos may be bigger than it->size
 611                                 setCursor(makeDocIterator(it, min(bottom_pos, it->size())));
 612                                 return boost::make_tuple(bottom_pit, bottom_pos, it->id());
 613                         }
 614         }
 615         // both methods fail
 616         return boost::make_tuple(pit_type(0), pos_type(0), 0);
 617 }
 618
 619
 620 void BufferView::switchKeyMap()
 621 {
 622         if (!lyxrc.rtl_support)
 623                 return;
 624
 625         if (cursor_.innerText()->real_current_font.isRightToLeft()) {
 626                 if (intl_->keymap == Intl::PRIMARY)
 627                         intl_->keyMapSec();
 628         } else {
 629                 if (intl_->keymap == Intl::SECONDARY)
 630                         intl_->keyMapPrim();
 631         }
 632 }
 633
 634
 635 int BufferView::workWidth() const
 636 {
 637         return width_;
 638 }
 639
 640
 641 void BufferView::center()
 642 {
 643         CursorSlice & bot = cursor_.bottom();
 644         TextMetrics & tm = text_metrics_[bot.text()];
 645         pit_type const pit = bot.pit();
 646         tm.redoParagraph(pit);
 647         ParagraphMetrics const & pm = tm.parMetrics(pit);
 648         anchor_ref_ = pit;
 649         offset_ref_ = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary()).y_
 650                 + pm.ascent() - height_ / 2;
 651 }
 652
 653
 654 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 655 {
 656         FuncStatus flag;
 657
 658         switch (cmd.action) {
 659
 660         case LFUN_UNDO:
 661                 flag.enabled(!buffer_->undostack().empty());
 662                 break;
 663         case LFUN_REDO:
 664                 flag.enabled(!buffer_->redostack().empty());
 665                 break;
 666         case LFUN_FILE_INSERT:
 667         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 668         case LFUN_FILE_INSERT_PLAINTEXT:
 669         case LFUN_BOOKMARK_SAVE:
 670                 // FIXME: Actually, these LFUNS should be moved to LyXText
 671                 flag.enabled(cursor_.inTexted());
 672                 break;
 673         case LFUN_FONT_STATE:
 674         case LFUN_LABEL_INSERT:
 675         case LFUN_PARAGRAPH_GOTO:
 676         // FIXME handle non-trivially
 677         case LFUN_OUTLINE_UP:
 678         case LFUN_OUTLINE_DOWN:
 679         case LFUN_OUTLINE_IN:
 680         case LFUN_OUTLINE_OUT:
 681         case LFUN_NOTE_NEXT:
 682         case LFUN_REFERENCE_NEXT:
 683         case LFUN_WORD_FIND:
 684         case LFUN_WORD_REPLACE:
 685         case LFUN_MARK_OFF:
 686         case LFUN_MARK_ON:
 687         case LFUN_MARK_TOGGLE:
 688         case LFUN_SCREEN_RECENTER:
 689         case LFUN_BIBTEX_DATABASE_ADD:
 690         case LFUN_BIBTEX_DATABASE_DEL:
 691         case LFUN_WORDS_COUNT:
 692         case LFUN_NEXT_INSET_TOGGLE:
 693                 flag.enabled(true);
 694                 break;
 695
 696         case LFUN_LABEL_GOTO: {
 697                 flag.enabled(!cmd.argument().empty()
 698                     || getInsetByCode<InsetRef>(cursor_, InsetBase::REF_CODE));
 699                 break;
 700         }
 701
 702         case LFUN_CHANGES_TRACK:
 703                 flag.enabled(true);
 704                 flag.setOnOff(buffer_->params().trackChanges);
 705                 break;
 706
 707         case LFUN_CHANGES_OUTPUT:
 708                 flag.enabled(buffer_ && LaTeXFeatures::isAvailable("dvipost"));
 709                 flag.setOnOff(buffer_->params().outputChanges);
 710                 break;
 711
 712         case LFUN_CHANGES_MERGE:
 713         case LFUN_CHANGE_NEXT:
 714         case LFUN_ALL_CHANGES_ACCEPT:
 715         case LFUN_ALL_CHANGES_REJECT:
 716                 // TODO: context-sensitive enabling of LFUNs
 717                 // In principle, these command should only be enabled if there
 718                 // is a change in the document. However, without proper
 719                 // optimizations, this will inevitably result in poor performance.
 720                 flag.enabled(buffer_);
 721                 break;
 722
 723         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 724                 flag.setOnOff(buffer_->params().compressed);
 725                 break;
 726         }
 727
 728         default:
 729                 flag.enabled(false);
 730         }
 731
 732         return flag;
 733 }
 734
 735
 736 Update::flags BufferView::dispatch(FuncRequest const & cmd)
 737 {
 738         //lyxerr << BOOST_CURRENT_FUNCTION
 739         //       << [ cmd = " << cmd << "]" << endl;
 740
 741         // Make sure that the cached BufferView is correct.
 742         LYXERR(Debug::ACTION) << BOOST_CURRENT_FUNCTION
 743                 << " action[" << cmd.action << ']'
 744                 << " arg[" << to_utf8(cmd.argument()) << ']'
 745                 << " x[" << cmd.x << ']'
 746                 << " y[" << cmd.y << ']'
 747                 << " button[" << cmd.button() << ']'
 748                 << endl;
 749
 750         // FIXME: this should not be possible.
 751         if (!buffer_)
 752                 return Update::None;
 753
 754         LCursor & cur = cursor_;
 755         // Default Update flags.
 756         Update::flags updateFlags = Update::Force | Update::FitCursor;
 757
 758         switch (cmd.action) {
 759
 760         case LFUN_UNDO:
 761                 cur.message(_("Undo"));
 762                 cur.clearSelection();
 763                 if (!textUndo(*this)) {
 764                         cur.message(_("No further undo information"));
 765                         updateFlags = Update::None;
 766                 }
 767                 switchKeyMap();
 768                 break;
 769
 770         case LFUN_REDO:
 771                 cur.message(_("Redo"));
 772                 cur.clearSelection();
 773                 if (!textRedo(*this)) {
 774                         cur.message(_("No further redo information"));
 775                         updateFlags = Update::None;
 776                 }
 777                 switchKeyMap();
 778                 break;
 779
 780         case LFUN_FILE_INSERT:
 781                 // FIXME UNICODE
 782                 menuInsertLyXFile(to_utf8(cmd.argument()));
 783                 break;
 784
 785         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 786                 // FIXME UNICODE
 787                 insertPlaintextFile(this, to_utf8(cmd.argument()), true);
 788                 break;
 789
 790         case LFUN_FILE_INSERT_PLAINTEXT:
 791                 // FIXME UNICODE
 792                 insertPlaintextFile(this, to_utf8(cmd.argument()), false);
 793                 break;
 794
 795         case LFUN_FONT_STATE:
 796                 cur.message(cur.currentState());
 797                 break;
 798
 799         case LFUN_BOOKMARK_SAVE:
 800                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 801                 break;
 802
 803         case LFUN_LABEL_GOTO: {
 804                 docstring label = cmd.argument();
 805                 if (label.empty()) {
 806                         InsetRef * inset =
 807                                 getInsetByCode<InsetRef>(cursor_,
 808                                                          InsetBase::REF_CODE);
 809                         if (inset) {
 810                                 label = inset->getParam("reference");
 811                                 // persistent=false: use temp_bookmark
 812                                 saveBookmark(0);
 813                         }
 814                 }
 815
 816                 if (!label.empty())
 817                         gotoLabel(label);
 818                 break;
 819         }
 820
 821         case LFUN_PARAGRAPH_GOTO: {
 822                 int const id = convert<int>(to_utf8(cmd.argument()));
 823                 int i = 0;
 824                 for (Buffer * b = buffer_; i == 0 || b != buffer_; b = theBufferList().next(b)) {
 825                         ParIterator par = b->getParFromID(id);
 826                         if (par == b->par_iterator_end()) {
 827                                 LYXERR(Debug::INFO)
 828                                         << "No matching paragraph found! ["
 829                                         << id << "]." << endl;
 830                         } else {
 831                                 LYXERR(Debug::INFO)
 832                                         << "Paragraph " << par->id()
 833                                         << " found in buffer `"
 834                                         << b->fileName() << "'." << endl;
 835
 836                                 if (b == buffer_) {
 837                                         // Set the cursor
 838                                         setCursor(makeDocIterator(par, 0));
 839                                         switchKeyMap();
 840                                 } else {
 841                                         // Switch to other buffer view and resend cmd
 842                                         theLyXFunc().dispatch(FuncRequest(
 843                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 844                                         theLyXFunc().dispatch(cmd);
 845                                         updateFlags = Update::None;
 846                                 }
 847                                 break;
 848                         }
 849                         ++i;
 850                 }
 851                 break;
 852         }
 853
 854         case LFUN_OUTLINE_UP:
 855                 toc::outline(toc::Up, cursor_);
 856                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 857                 updateLabels(*buffer_);
 858                 break;
 859         case LFUN_OUTLINE_DOWN:
 860                 toc::outline(toc::Down, cursor_);
 861                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 862                 updateLabels(*buffer_);
 863                 break;
 864         case LFUN_OUTLINE_IN:
 865                 toc::outline(toc::In, cursor_);
 866                 updateLabels(*buffer_);
 867                 break;
 868         case LFUN_OUTLINE_OUT:
 869                 toc::outline(toc::Out, cursor_);
 870                 updateLabels(*buffer_);
 871                 break;
 872
 873         case LFUN_NOTE_NEXT:
 874                 bv_funcs::gotoInset(this, InsetBase::NOTE_CODE, false);
 875                 break;
 876
 877         case LFUN_REFERENCE_NEXT: {
 878                 vector<InsetBase_code> tmp;
 879                 tmp.push_back(InsetBase::LABEL_CODE);
 880                 tmp.push_back(InsetBase::REF_CODE);
 881                 bv_funcs::gotoInset(this, tmp, true);
 882                 break;
 883         }
 884
 885         case LFUN_CHANGES_TRACK:
 886                 buffer_->params().trackChanges = !buffer_->params().trackChanges;
 887                 break;
 888
 889         case LFUN_CHANGES_OUTPUT:
 890                 buffer_->params().outputChanges = !buffer_->params().outputChanges;
 891                 break;
 892
 893         case LFUN_CHANGE_NEXT:
 894                 findNextChange(this);
 895                 break;
 896
 897         case LFUN_CHANGES_MERGE:
 898                 if (findNextChange(this))
 899                         showDialog("changes");
 900                 break;
 901
 902         case LFUN_ALL_CHANGES_ACCEPT:
 903                 // select complete document
 904                 cursor_.reset(buffer_->inset());
 905                 cursor_.selHandle(true);
 906                 buffer_->text().cursorBottom(cursor_);
 907                 // accept everything in a single step to support atomic undo
 908                 buffer_->text().acceptOrRejectChanges(cursor_, LyXText::ACCEPT);
 909                 break;
 910
 911         case LFUN_ALL_CHANGES_REJECT:
 912                 // select complete document
 913                 cursor_.reset(buffer_->inset());
 914                 cursor_.selHandle(true);
 915                 buffer_->text().cursorBottom(cursor_);
 916                 // reject everything in a single step to support atomic undo
 917                 // Note: reject does not work recursively; the user may have to repeat the operation
 918                 buffer_->text().acceptOrRejectChanges(cursor_, LyXText::REJECT);
 919                 break;
 920
 921         case LFUN_WORD_FIND:
 922                 find(this, cmd);
 923                 break;
 924
 925         case LFUN_WORD_REPLACE:
 926                 replace(this, cmd);
 927                 break;
 928
 929         case LFUN_MARK_OFF:
 930                 cur.clearSelection();
 931                 cur.resetAnchor();
 932                 cur.message(from_utf8(N_("Mark off")));
 933                 break;
 934
 935         case LFUN_MARK_ON:
 936                 cur.clearSelection();
 937                 cur.mark() = true;
 938                 cur.resetAnchor();
 939                 cur.message(from_utf8(N_("Mark on")));
 940                 break;
 941
 942         case LFUN_MARK_TOGGLE:
 943                 cur.clearSelection();
 944                 if (cur.mark()) {
 945                         cur.mark() = false;
 946                         cur.message(from_utf8(N_("Mark removed")));
 947                 } else {
 948                         cur.mark() = true;
 949                         cur.message(from_utf8(N_("Mark set")));
 950                 }
 951                 cur.resetAnchor();
 952                 break;
 953
 954         case LFUN_SCREEN_RECENTER:
 955                 center();
 956                 break;
 957
 958         case LFUN_BIBTEX_DATABASE_ADD: {
 959                 LCursor tmpcur = cursor_;
 960                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 961                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 962                                                 InsetBase::BIBTEX_CODE);
 963                 if (inset) {
 964                         if (inset->addDatabase(to_utf8(cmd.argument())))
 965                                 buffer_->updateBibfilesCache();
 966                 }
 967                 break;
 968         }
 969
 970         case LFUN_BIBTEX_DATABASE_DEL: {
 971                 LCursor tmpcur = cursor_;
 972                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 973                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 974                                                 InsetBase::BIBTEX_CODE);
 975                 if (inset) {
 976                         if (inset->delDatabase(to_utf8(cmd.argument())))
 977                                 buffer_->updateBibfilesCache();
 978                 }
 979                 break;
 980         }
 981
 982         case LFUN_WORDS_COUNT: {
 983                 DocIterator from, to;
 984                 if (cur.selection()) {
 985                         from = cur.selectionBegin();
 986                         to = cur.selectionEnd();
 987                 } else {
 988                         from = doc_iterator_begin(buffer_->inset());
 989                         to = doc_iterator_end(buffer_->inset());
 990                 }
 991                 int const count = countWords(from, to);
 992                 docstring message;
 993                 if (count != 1) {
 994                         if (cur.selection())
 995                                 message = bformat(_("%1$d words in selection."),
 996                                           count);
 997                                 else
 998                                         message = bformat(_("%1$d words in document."),
 999                                                           count);
1000                 }
1001                 else {
1002                         if (cur.selection())
1003                                 message = _("One word in selection.");
1004                         else
1005                                 message = _("One word in document.");
1006                 }
1007
1008                 Alert::information(_("Count words"), message);
1009         }
1010                 break;
1011
1012         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1013                 // turn compression on/off
1014                 buffer_->params().compressed = !buffer_->params().compressed;
1015                 break;
1016
1017         case LFUN_NEXT_INSET_TOGGLE: {
1018                 // this is the real function we want to invoke
1019                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
1020                 // if there is an inset at cursor, see whether it
1021                 // wants to toggle.
1022                 InsetBase * inset = cur.nextInset();
1023                 if (inset && inset->isActive()) {
1024                         LCursor tmpcur = cur;
1025                         tmpcur.pushLeft(*inset);
1026                         inset->dispatch(tmpcur, tmpcmd);
1027                         if (tmpcur.result().dispatched()) {
1028                                 cur.dispatched();
1029                         }
1030                 }
1031                 // if it did not work, try the underlying inset.
1032                 if (!cur.result().dispatched())
1033                         cur.dispatch(tmpcmd);
1034
1035                 if (cur.result().dispatched())
1036                         cur.clearSelection();
1037
1038                 break;
1039         }
1040
1041         default:
1042                 updateFlags = Update::None;
1043         }
1044
1045         return updateFlags;
1046 }
1047
1048
1049 docstring const BufferView::requestSelection()
1050 {
1051         if (!buffer_)
1052                 return docstring();
1053
1054         LCursor & cur = cursor_;
1055
1056         if (!cur.selection()) {
1057                 xsel_cache_.set = false;
1058                 return docstring();
1059         }
1060
1061         if (!xsel_cache_.set ||
1062             cur.top() != xsel_cache_.cursor ||
1063             cur.anchor_.top() != xsel_cache_.anchor)
1064         {
1065                 xsel_cache_.cursor = cur.top();
1066                 xsel_cache_.anchor = cur.anchor_.top();
1067                 xsel_cache_.set = cur.selection();
1068                 return cur.selectionAsString(false);
1069         }
1070         return docstring();
1071 }
1072
1073
1074 void BufferView::clearSelection()
1075 {
1076         if (buffer_) {
1077                 cursor_.clearSelection();
1078                 // Clear the selection buffer. Otherwise a subsequent
1079                 // middle-mouse-button paste would use the selection buffer,
1080                 // not the more current external selection.
1081                 cap::clearSelection();
1082                 xsel_cache_.set = false;
1083                 // The buffer did not really change, but this causes the
1084                 // redraw we need because we cleared the selection above.
1085                 buffer_->changed();
1086         }
1087 }
1088
1089
1090 void BufferView::workAreaResize(int width, int height)
1091 {
1092         // Update from work area
1093         width_ = width;
1094         height_ = height;
1095
1096         // The complete text metrics will be redone.
1097         text_metrics_.clear();
1098
1099         if (buffer_)
1100                 resize();
1101 }
1102
1103
1104 InsetBase const * BufferView::getCoveringInset(LyXText const & text, int x, int y)
1105 {
1106         pit_type pit = text.getPitNearY(*this, y);
1107         BOOST_ASSERT(pit != -1);
1108         Paragraph const & par = text.getPar(pit);
1109
1110         LYXERR(Debug::DEBUG)
1111                 << BOOST_CURRENT_FUNCTION
1112                 << ": x: " << x
1113                 << " y: " << y
1114                 << "  pit: " << pit
1115                 << endl;
1116         InsetList::const_iterator iit = par.insetlist.begin();
1117         InsetList::const_iterator iend = par.insetlist.end();
1118         for (; iit != iend; ++iit) {
1119                 InsetBase * const inset = iit->inset;
1120                 if (inset->covers(*this, x, y)) {
1121                         if (!inset->descendable())
1122                                 // No need to go further down if the inset is not
1123                                 // descendable.
1124                                 return inset;
1125
1126                         size_t cell_number = inset->nargs();
1127                         // Check all the inner cell.
1128                         for (size_t i = 0; i != cell_number; ++i) {
1129                                 LyXText const * inner_text = inset->getText(i);
1130                                 if (inner_text) {
1131                                         // Try deeper.
1132                                         InsetBase const * inset_deeper =
1133                                                 getCoveringInset(*inner_text, x, y);
1134                                         if (inset_deeper)
1135                                                 return inset_deeper;
1136                                 }
1137                         }
1138
1139                         LYXERR(Debug::DEBUG)
1140                                 << BOOST_CURRENT_FUNCTION
1141                                 << ": Hit inset: " << inset << endl;
1142                         return inset;
1143                 }
1144         }
1145         LYXERR(Debug::DEBUG)
1146                 << BOOST_CURRENT_FUNCTION
1147                 << ": No inset hit. " << endl;
1148         return 0;
1149 }
1150
1151
1152 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
1153 {
1154         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1155
1156         // This is only called for mouse related events including
1157         // LFUN_FILE_OPEN generated by drag-and-drop.
1158         FuncRequest cmd = cmd0;
1159
1160         // E.g. Qt mouse press when no buffer
1161         if (!buffer_)
1162                 return false;
1163
1164         LCursor cur(*this);
1165         cur.push(buffer_->inset());
1166         cur.selection() = cursor_.selection();
1167
1168         // Either the inset under the cursor or the
1169         // surrounding LyXText will handle this event.
1170
1171         // make sure we stay within the screen...
1172         cmd.y = min(max(cmd.y, -1), height_);
1173
1174         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1175
1176                 // Get inset under mouse, if there is one.
1177                 InsetBase const * covering_inset =
1178                         getCoveringInset(buffer_->text(), cmd.x, cmd.y);
1179                 if (covering_inset == last_inset_)
1180                         // Same inset, no need to do anything...
1181                         return false;
1182
1183                 bool need_redraw = false;
1184                 // const_cast because of setMouseHover().
1185                 InsetBase * inset = const_cast<InsetBase *>(covering_inset);
1186                 if (last_inset_)
1187                         // Remove the hint on the last hovered inset (if any).
1188                         need_redraw |= last_inset_->setMouseHover(false);
1189                 if (inset)
1190                         // Highlighted the newly hovered inset (if any).
1191                         need_redraw |= inset->setMouseHover(true);
1192                 last_inset_ = inset;
1193
1194                 // if last metrics update was in singlepar mode, WorkArea::redraw() will
1195                 // not expose the button for redraw. We adjust here the metrics dimension
1196                 // to enable a full redraw.
1197                 // FIXME: It is possible to redraw only the area around the button!
1198                 if (need_redraw
1199                         && metrics_info_.update_strategy == SingleParUpdate) {
1200                         // FIXME: It should be possible to redraw only the area around
1201                         // the button by doing this:
1202                         //
1203                         //metrics_info_.singlepar = false;
1204                         //metrics_info_.y1 = ymin of button;
1205                         //metrics_info_.y2 = ymax of button;
1206                         //
1207                         // Unfortunately, rowpainter.C:paintText() does not distinguish
1208                         // between background updates and text updates. So we use the hammer
1209                         // solution for now. We could also avoid the updateMetrics() below
1210                         // by using the first and last pit of the CoordCache. Have a look
1211                         // at LyXText::getPitNearY() to see what I mean.
1212                         //
1213                         //metrics_info_.pit1 = first pit of CoordCache;
1214                         //metrics_info_.pit2 = last pit of CoordCache;
1215                         //metrics_info_.singlepar = false;
1216                         //metrics_info_.y1 = 0;
1217                         //metrics_info_.y2 = height_;
1218                         //
1219                         updateMetrics(false);
1220                 }
1221
1222                 // This event (moving without mouse click) is not passed further.
1223                 // This should be changed if it is further utilized.
1224                 return need_redraw;
1225         }
1226
1227         // Build temporary cursor.
1228         InsetBase * inset = buffer_->text().editXY(cur, cmd.x, cmd.y);
1229
1230         // Put anchor at the same position.
1231         cur.resetAnchor();
1232
1233         // Try to dispatch to an non-editable inset near this position
1234         // via the temp cursor. If the inset wishes to change the real
1235         // cursor it has to do so explicitly by using
1236         //  cur.bv().cursor() = cur;  (or similar)
1237         if (inset) {
1238                 inset->dispatch(cur, cmd);
1239         }
1240
1241         // Now dispatch to the temporary cursor. If the real cursor should
1242         // be modified, the inset's dispatch has to do so explicitly.
1243         if (!cur.result().dispatched())
1244                 cur.dispatch(cmd);
1245
1246         // Redraw if requested and necessary.
1247         if (cur.result().dispatched() && cur.result().update())
1248                 return update(cur.result().update());
1249
1250         return false;
1251 }
1252
1253
1254 void BufferView::scroll(int /*lines*/)
1255 {
1256 //      if (!buffer_)
1257 //              return;
1258 //
1259 //      LyXText const * t = &buffer_->text();
1260 //      int const line_height = defaultRowHeight();
1261 //
1262 //      // The new absolute coordinate
1263 //      int new_top_y = top_y() + lines * line_height;
1264 //
1265 //      // Restrict to a valid value
1266 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
1267 //      new_top_y = std::max(0, new_top_y);
1268 //
1269 //      scrollDocView(new_top_y);
1270 //
1271 }
1272
1273
1274 void BufferView::setCursorFromRow(int row)
1275 {
1276         int tmpid = -1;
1277         int tmppos = -1;
1278
1279         buffer_->texrow().getIdFromRow(row, tmpid, tmppos);
1280
1281         if (tmpid == -1)
1282                 buffer_->text().setCursor(cursor_, 0, 0);
1283         else
1284                 buffer_->text().setCursor(cursor_, buffer_->getParFromID(tmpid).pit(), tmppos);
1285 }
1286
1287
1288 void BufferView::gotoLabel(docstring const & label)
1289 {
1290         for (InsetIterator it = inset_iterator_begin(buffer_->inset()); it; ++it) {
1291                 vector<docstring> labels;
1292                 it->getLabelList(*buffer_, labels);
1293                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1294                         setCursor(it);
1295                         update();
1296                         return;
1297                 }
1298         }
1299 }
1300
1301
1302 TextMetrics const & BufferView::textMetrics(LyXText const * t) const
1303 {
1304         return const_cast<BufferView *>(this)->textMetrics(t);
1305 }
1306
1307
1308 TextMetrics & BufferView::textMetrics(LyXText const * t)
1309 {
1310         TextMetricsCache::iterator tmc_it  = text_metrics_.find(t);
1311         if (tmc_it == text_metrics_.end()) {
1312                 tmc_it = text_metrics_.insert(
1313                         make_pair(t, TextMetrics(this, const_cast<LyXText *>(t)))).first;
1314         }
1315         return tmc_it->second;
1316 }
1317
1318
1319 ParagraphMetrics const & BufferView::parMetrics(LyXText const * t,
1320                 pit_type pit) const
1321 {
1322         return textMetrics(t).parMetrics(pit);
1323 }
1324
1325
1326 int BufferView::workHeight() const
1327 {
1328         return height_;
1329 }
1330
1331
1332 void BufferView::setCursor(DocIterator const & dit)
1333 {
1334         size_t const n = dit.depth();
1335         for (size_t i = 0; i < n; ++i)
1336                 dit[i].inset().edit(cursor_, true);
1337
1338         cursor_.setCursor(dit);
1339         cursor_.selection() = false;
1340 }
1341
1342
1343 bool BufferView::checkDepm(LCursor & cur, LCursor & old)
1344 {
1345         // Would be wrong to delete anything if we have a selection.
1346         if (cur.selection())
1347                 return false;
1348
1349         bool need_anchor_change = false;
1350         bool changed = cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1351                 need_anchor_change);
1352
1353         if (need_anchor_change)
1354                 cur.resetAnchor();
1355
1356         if (!changed)
1357                 return false;
1358
1359         updateLabels(*buffer_);
1360
1361         updateMetrics(false);
1362         buffer_->changed();
1363         return true;
1364 }
1365
1366
1367 bool BufferView::mouseSetCursor(LCursor & cur)
1368 {
1369         BOOST_ASSERT(&cur.bv() == this);
1370
1371         // Has the cursor just left the inset?
1372         bool badcursor = false;
1373         bool leftinset = (&cursor_.inset() != &cur.inset());
1374         if (leftinset)
1375                 badcursor = cursor_.inset().notifyCursorLeaves(cursor_);
1376
1377         // do the dEPM magic if needed
1378         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
1379         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
1380         // the leftinset bool would not be necessary (badcursor instead).
1381         bool update = leftinset;
1382         if (!badcursor && cursor_.inTexted())
1383                 update |= checkDepm(cur, cursor_);
1384
1385         // if the cursor was in an empty script inset and the new
1386         // position is in the nucleus of the inset, notifyCursorLeaves
1387         // will kill the script inset itself. So we check all the
1388         // elements of the cursor to make sure that they are correct.
1389         // For an example, see bug 2933:
1390         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1391         // The code below could maybe be moved to a DocIterator method.
1392         //lyxerr << "cur before " << cur <<std::endl;
1393         DocIterator dit(cur.inset());
1394         dit.push_back(cur.bottom());
1395         size_t i = 1;
1396         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1397                 dit.push_back(cur[i]);
1398                 ++i;
1399         }
1400         //lyxerr << "5 cur after" << dit <<std::endl;
1401
1402         cursor_.setCursor(dit);
1403         cursor_.clearSelection();
1404         finishUndo();
1405         return update;
1406 }
1407
1408
1409 void BufferView::putSelectionAt(DocIterator const & cur,
1410                                 int length, bool backwards)
1411 {
1412         cursor_.clearSelection();
1413
1414         setCursor(cur);
1415
1416         if (length) {
1417                 if (backwards) {
1418                         cursor_.pos() += length;
1419                         cursor_.setSelection(cursor_, -length);
1420                 } else
1421                         cursor_.setSelection(cursor_, length);
1422                 cap::saveSelection(cursor_);
1423         }
1424 }
1425
1426
1427 LCursor & BufferView::cursor()
1428 {
1429         return cursor_;
1430 }
1431
1432
1433 LCursor const & BufferView::cursor() const
1434 {
1435         return cursor_;
1436 }
1437
1438
1439 pit_type BufferView::anchor_ref() const
1440 {
1441         return anchor_ref_;
1442 }
1443
1444
1445 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1446 {
1447         return metrics_info_;
1448 }
1449
1450
1451 // FIXME: We should split-up updateMetrics() for the singlepar case.
1452 void BufferView::updateMetrics(bool singlepar)
1453 {
1454         LyXText & buftext = buffer_->text();
1455         TextMetrics & tm = textMetrics(&buftext);
1456         pit_type size = int(buftext.paragraphs().size());
1457
1458         if (anchor_ref_ > int(buftext.paragraphs().size() - 1)) {
1459                 anchor_ref_ = int(buftext.paragraphs().size() - 1);
1460                 offset_ref_ = 0;
1461         }
1462
1463         // If the paragraph metrics has changed, we can not
1464         // use the singlepar optimisation.
1465         if (singlepar
1466                 // In Single Paragraph mode, rebreak only
1467                 // the (main text, not inset!) paragraph containing the cursor.
1468                 // (if this paragraph contains insets etc., rebreaking will
1469                 // recursively descend)
1470                 && tm.redoParagraph(cursor_.bottom().pit()))
1471                 singlepar = false;
1472
1473         pit_type const pit = anchor_ref_;
1474         int pit1 = pit;
1475         int pit2 = pit;
1476         size_t const npit = buftext.paragraphs().size();
1477
1478         // Rebreak anchor paragraph.
1479         if (!singlepar)
1480                 tm.redoParagraph(pit);
1481
1482         // Clear out the position cache in case of full screen redraw.
1483         if (!singlepar)
1484                 coord_cache_.clear();
1485
1486         int y0 = tm.parMetrics(pit).ascent() - offset_ref_;
1487
1488         // Redo paragraphs above anchor if necessary.
1489         int y1 = y0;
1490         while (y1 > 0 && pit1 > 0) {
1491                 y1 -= tm.parMetrics(pit1).ascent();
1492                 --pit1;
1493                 if (!singlepar)
1494                         tm.redoParagraph(pit1);
1495                 y1 -= tm.parMetrics(pit1).descent();
1496         }
1497
1498
1499         // Take care of ascent of first line
1500         y1 -= tm.parMetrics(pit1).ascent();
1501
1502         // Normalize anchor for next time
1503         anchor_ref_ = pit1;
1504         offset_ref_ = -y1;
1505
1506         // Grey at the beginning is ugly
1507         if (pit1 == 0 && y1 > 0) {
1508                 y0 -= y1;
1509                 y1 = 0;
1510                 anchor_ref_ = 0;
1511         }
1512
1513         // Redo paragraphs below the anchor if necessary.
1514         int y2 = y0;
1515         while (y2 < height_ && pit2 < int(npit) - 1) {
1516                 y2 += tm.parMetrics(pit2).descent();
1517                 ++pit2;
1518                 if (!singlepar)
1519                         tm.redoParagraph(pit2);
1520                 y2 += tm.parMetrics(pit2).ascent();
1521         }
1522
1523         // Take care of descent of last line
1524         y2 += tm.parMetrics(pit2).descent();
1525
1526         // The coordinates of all these paragraphs are correct, cache them
1527         int y = y1;
1528         CoordCache::InnerParPosCache & parPos = coord_cache_.parPos()[&buftext];
1529         for (pit_type pit = pit1; pit <= pit2; ++pit) {
1530                 ParagraphMetrics const & pm = tm.parMetrics(pit);
1531                 y += pm.ascent();
1532                 parPos[pit] = Point(0, y);
1533                 if (singlepar && pit == cursor_.bottom().pit()) {
1534                         // In Single Paragraph mode, collect here the
1535                         // y1 and y2 of the (one) paragraph the cursor is in
1536                         y1 = y - pm.ascent();
1537                         y2 = y + pm.descent();
1538                 }
1539                 y += pm.descent();
1540         }
1541
1542         if (singlepar) {
1543                 // collect cursor paragraph iter bounds
1544                 pit1 = cursor_.bottom().pit();
1545                 pit2 = cursor_.bottom().pit();
1546         }
1547
1548         LYXERR(Debug::DEBUG)
1549                 << BOOST_CURRENT_FUNCTION
1550                 << " y1: " << y1
1551                 << " y2: " << y2
1552                 << " pit1: " << pit1
1553                 << " pit2: " << pit2
1554                 << " npit: " << npit
1555                 << " singlepar: " << singlepar
1556                 << "size: " << size
1557                 << endl;
1558
1559         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2,
1560                 singlepar? SingleParUpdate: FullScreenUpdate, size);
1561
1562         if (lyxerr.debugging(Debug::WORKAREA)) {
1563                 LYXERR(Debug::WORKAREA) << "BufferView::updateMetrics" << endl;
1564                 coord_cache_.dump();
1565         }
1566 }
1567
1568
1569 void BufferView::menuInsertLyXFile(string const & filenm)
1570 {
1571         BOOST_ASSERT(cursor_.inTexted());
1572         string filename = filenm;
1573
1574         if (filename.empty()) {
1575                 // Launch a file browser
1576                 // FIXME UNICODE
1577                 string initpath = lyxrc.document_path;
1578
1579                 if (buffer_) {
1580                         string const trypath = buffer_->filePath();
1581                         // If directory is writeable, use this as default.
1582                         if (isDirWriteable(FileName(trypath)))
1583                                 initpath = trypath;
1584                 }
1585
1586                 // FIXME UNICODE
1587                 FileDialog fileDlg(_("Select LyX document to insert"),
1588                         LFUN_FILE_INSERT,
1589                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1590                         make_pair(_("Examples|#E#e"), from_utf8(addPath(package().system_support().absFilename(), "examples"))));
1591
1592                 FileDialog::Result result =
1593                         fileDlg.open(from_utf8(initpath),
1594                                      FileFilterList(_("LyX Documents (*.lyx)")),
1595                                      docstring());
1596
1597                 if (result.first == FileDialog::Later)
1598                         return;
1599
1600                 // FIXME UNICODE
1601                 filename = to_utf8(result.second);
1602
1603                 // check selected filename
1604                 if (filename.empty()) {
1605                         // emit message signal.
1606                         message(_("Canceled."));
1607                         return;
1608                 }
1609         }
1610
1611         // Get absolute path of file and add ".lyx"
1612         // to the filename if necessary
1613         filename = fileSearch(string(), filename, "lyx").absFilename();
1614
1615         docstring const disp_fn = makeDisplayPath(filename);
1616         // emit message signal.
1617         message(bformat(_("Inserting document %1$s..."), disp_fn));
1618
1619         docstring res;
1620         Buffer buf("", false);
1621         if (lyx::loadLyXFile(&buf, FileName(filename))) {
1622                 ErrorList & el = buffer_->errorList("Parse");
1623                 // Copy the inserted document error list into the current buffer one.
1624                 el = buf.errorList("Parse");
1625                 recordUndo(cursor_);
1626                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1627                                              buf.params().textclass, el);
1628                 res = _("Document %1$s inserted.");
1629         } else
1630                 res = _("Could not insert document %1$s");
1631
1632         // emit message signal.
1633         message(bformat(res, disp_fn));
1634         buffer_->errors("Parse");
1635         resize();
1636 }
1637
1638 } // namespace lyx