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                         setCursor(makeDocIterator(par, min(par->size(), top_pos)));
 585                         // Note: return bottom (document) level pit.
 586                         return boost::make_tuple(cursor_.bottom().pit(), cursor_.bottom().pos(), top_id);
 587                 }
 588         }
 589         // if top_id == 0, or searching through top_id failed
 590         // This is the case for a 'restored' bookmark when only bottom
 591         // (document level) pit was saved. Because of this, bookmark
 592         // restoration is inaccurate. If a bookmark was within an inset,
 593         // it will be restored to the left of the outmost inset that contains
 594         // the bookmark.
 595         if (static_cast<size_t>(bottom_pit) < buffer_->paragraphs().size()) {
 596                 ParIterator it = buffer_->par_iterator_begin();
 597                 ParIterator const end = buffer_->par_iterator_end();
 598                 for (; it != end; ++it)
 599                         if (it.pit() == bottom_pit) {
 600                                 // restored pos may be bigger than it->size
 601                                 setCursor(makeDocIterator(it, min(bottom_pos, it->size())));
 602                                 return boost::make_tuple(bottom_pit, bottom_pos, it->id());
 603                         }
 604         }
 605         // both methods fail
 606         return boost::make_tuple(pit_type(0), pos_type(0), 0);
 607 }
 608
 609
 610 void BufferView::switchKeyMap()
 611 {
 612         if (!lyxrc.rtl_support)
 613                 return;
 614
 615         if (cursor_.innerText()->real_current_font.isRightToLeft()) {
 616                 if (intl_->keymap == Intl::PRIMARY)
 617                         intl_->keyMapSec();
 618         } else {
 619                 if (intl_->keymap == Intl::SECONDARY)
 620                         intl_->keyMapPrim();
 621         }
 622 }
 623
 624
 625 int BufferView::workWidth() const
 626 {
 627         return width_;
 628 }
 629
 630
 631 void BufferView::center()
 632 {
 633         CursorSlice & bot = cursor_.bottom();
 634         TextMetrics & tm = text_metrics_[bot.text()];
 635         pit_type const pit = bot.pit();
 636         tm.redoParagraph(pit);
 637         ParagraphMetrics const & pm = tm.parMetrics(pit);
 638         anchor_ref_ = pit;
 639         offset_ref_ = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary()).y_
 640                 + pm.ascent() - height_ / 2;
 641 }
 642
 643
 644 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 645 {
 646         FuncStatus flag;
 647
 648         switch (cmd.action) {
 649
 650         case LFUN_UNDO:
 651                 flag.enabled(!buffer_->undostack().empty());
 652                 break;
 653         case LFUN_REDO:
 654                 flag.enabled(!buffer_->redostack().empty());
 655                 break;
 656         case LFUN_FILE_INSERT:
 657         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 658         case LFUN_FILE_INSERT_PLAINTEXT:
 659         case LFUN_BOOKMARK_SAVE:
 660                 // FIXME: Actually, these LFUNS should be moved to LyXText
 661                 flag.enabled(cursor_.inTexted());
 662                 break;
 663         case LFUN_FONT_STATE:
 664         case LFUN_LABEL_INSERT:
 665         case LFUN_PARAGRAPH_GOTO:
 666         // FIXME handle non-trivially
 667         case LFUN_OUTLINE_UP:
 668         case LFUN_OUTLINE_DOWN:
 669         case LFUN_OUTLINE_IN:
 670         case LFUN_OUTLINE_OUT:
 671         case LFUN_NOTE_NEXT:
 672         case LFUN_REFERENCE_NEXT:
 673         case LFUN_WORD_FIND:
 674         case LFUN_WORD_REPLACE:
 675         case LFUN_MARK_OFF:
 676         case LFUN_MARK_ON:
 677         case LFUN_MARK_TOGGLE:
 678         case LFUN_SCREEN_RECENTER:
 679         case LFUN_BIBTEX_DATABASE_ADD:
 680         case LFUN_BIBTEX_DATABASE_DEL:
 681         case LFUN_WORDS_COUNT:
 682         case LFUN_NEXT_INSET_TOGGLE:
 683                 flag.enabled(true);
 684                 break;
 685
 686         case LFUN_LABEL_GOTO: {
 687                 flag.enabled(!cmd.argument().empty()
 688                     || getInsetByCode<InsetRef>(cursor_, InsetBase::REF_CODE));
 689                 break;
 690         }
 691
 692         case LFUN_CHANGES_TRACK:
 693                 flag.enabled(true);
 694                 flag.setOnOff(buffer_->params().trackChanges);
 695                 break;
 696
 697         case LFUN_CHANGES_OUTPUT:
 698                 flag.enabled(buffer_ && LaTeXFeatures::isAvailable("dvipost"));
 699                 flag.setOnOff(buffer_->params().outputChanges);
 700                 break;
 701
 702         case LFUN_CHANGES_MERGE:
 703         case LFUN_CHANGE_NEXT:
 704         case LFUN_ALL_CHANGES_ACCEPT:
 705         case LFUN_ALL_CHANGES_REJECT:
 706                 // TODO: context-sensitive enabling of LFUNs
 707                 // In principle, these command should only be enabled if there
 708                 // is a change in the document. However, without proper
 709                 // optimizations, this will inevitably result in poor performance.
 710                 flag.enabled(buffer_);
 711                 break;
 712
 713         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 714                 flag.setOnOff(buffer_->params().compressed);
 715                 break;
 716         }
 717
 718         default:
 719                 flag.enabled(false);
 720         }
 721
 722         return flag;
 723 }
 724
 725
 726 Update::flags BufferView::dispatch(FuncRequest const & cmd)
 727 {
 728         //lyxerr << BOOST_CURRENT_FUNCTION
 729         //       << [ cmd = " << cmd << "]" << endl;
 730
 731         // Make sure that the cached BufferView is correct.
 732         LYXERR(Debug::ACTION) << BOOST_CURRENT_FUNCTION
 733                 << " action[" << cmd.action << ']'
 734                 << " arg[" << to_utf8(cmd.argument()) << ']'
 735                 << " x[" << cmd.x << ']'
 736                 << " y[" << cmd.y << ']'
 737                 << " button[" << cmd.button() << ']'
 738                 << endl;
 739
 740         // FIXME: this should not be possible.
 741         if (!buffer_)
 742                 return Update::None;
 743
 744         LCursor & cur = cursor_;
 745         // Default Update flags.
 746         Update::flags updateFlags = Update::Force | Update::FitCursor;
 747
 748         switch (cmd.action) {
 749
 750         case LFUN_UNDO:
 751                 cur.message(_("Undo"));
 752                 cur.clearSelection();
 753                 if (!textUndo(*this)) {
 754                         cur.message(_("No further undo information"));
 755                         updateFlags = Update::None;
 756                 }
 757                 switchKeyMap();
 758                 break;
 759
 760         case LFUN_REDO:
 761                 cur.message(_("Redo"));
 762                 cur.clearSelection();
 763                 if (!textRedo(*this)) {
 764                         cur.message(_("No further redo information"));
 765                         updateFlags = Update::None;
 766                 }
 767                 switchKeyMap();
 768                 break;
 769
 770         case LFUN_FILE_INSERT:
 771                 // FIXME UNICODE
 772                 menuInsertLyXFile(to_utf8(cmd.argument()));
 773                 break;
 774
 775         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 776                 // FIXME UNICODE
 777                 insertPlaintextFile(this, to_utf8(cmd.argument()), true);
 778                 break;
 779
 780         case LFUN_FILE_INSERT_PLAINTEXT:
 781                 // FIXME UNICODE
 782                 insertPlaintextFile(this, to_utf8(cmd.argument()), false);
 783                 break;
 784
 785         case LFUN_FONT_STATE:
 786                 cur.message(cur.currentState());
 787                 break;
 788
 789         case LFUN_BOOKMARK_SAVE:
 790                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 791                 break;
 792
 793         case LFUN_LABEL_GOTO: {
 794                 docstring label = cmd.argument();
 795                 if (label.empty()) {
 796                         InsetRef * inset =
 797                                 getInsetByCode<InsetRef>(cursor_,
 798                                                          InsetBase::REF_CODE);
 799                         if (inset) {
 800                                 label = inset->getParam("reference");
 801                                 // persistent=false: use temp_bookmark
 802                                 saveBookmark(0);
 803                         }
 804                 }
 805
 806                 if (!label.empty())
 807                         gotoLabel(label);
 808                 break;
 809         }
 810
 811         case LFUN_PARAGRAPH_GOTO: {
 812                 int const id = convert<int>(to_utf8(cmd.argument()));
 813                 int i = 0;
 814                 for (Buffer * b = buffer_; i == 0 || b != buffer_; b = theBufferList().next(b)) {
 815                         ParIterator par = b->getParFromID(id);
 816                         if (par == b->par_iterator_end()) {
 817                                 LYXERR(Debug::INFO)
 818                                         << "No matching paragraph found! ["
 819                                         << id << "]." << endl;
 820                         } else {
 821                                 LYXERR(Debug::INFO)
 822                                         << "Paragraph " << par->id()
 823                                         << " found in buffer `"
 824                                         << b->fileName() << "'." << endl;
 825
 826                                 if (b == buffer_) {
 827                                         // Set the cursor
 828                                         setCursor(makeDocIterator(par, 0));
 829                                         switchKeyMap();
 830                                 } else {
 831                                         // Switch to other buffer view and resend cmd
 832                                         theLyXFunc().dispatch(FuncRequest(
 833                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 834                                         theLyXFunc().dispatch(cmd);
 835                                         updateFlags = Update::None;
 836                                 }
 837                                 break;
 838                         }
 839                         ++i;
 840                 }
 841                 break;
 842         }
 843
 844         case LFUN_OUTLINE_UP:
 845                 toc::outline(toc::Up, cursor_);
 846                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 847                 updateLabels(*buffer_);
 848                 break;
 849         case LFUN_OUTLINE_DOWN:
 850                 toc::outline(toc::Down, cursor_);
 851                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 852                 updateLabels(*buffer_);
 853                 break;
 854         case LFUN_OUTLINE_IN:
 855                 toc::outline(toc::In, cursor_);
 856                 updateLabels(*buffer_);
 857                 break;
 858         case LFUN_OUTLINE_OUT:
 859                 toc::outline(toc::Out, cursor_);
 860                 updateLabels(*buffer_);
 861                 break;
 862
 863         case LFUN_NOTE_NEXT:
 864                 bv_funcs::gotoInset(this, InsetBase::NOTE_CODE, false);
 865                 break;
 866
 867         case LFUN_REFERENCE_NEXT: {
 868                 vector<InsetBase_code> tmp;
 869                 tmp.push_back(InsetBase::LABEL_CODE);
 870                 tmp.push_back(InsetBase::REF_CODE);
 871                 bv_funcs::gotoInset(this, tmp, true);
 872                 break;
 873         }
 874
 875         case LFUN_CHANGES_TRACK:
 876                 buffer_->params().trackChanges = !buffer_->params().trackChanges;
 877                 break;
 878
 879         case LFUN_CHANGES_OUTPUT:
 880                 buffer_->params().outputChanges = !buffer_->params().outputChanges;
 881                 break;
 882
 883         case LFUN_CHANGE_NEXT:
 884                 findNextChange(this);
 885                 break;
 886
 887         case LFUN_CHANGES_MERGE:
 888                 if (findNextChange(this))
 889                         showDialog("changes");
 890                 break;
 891
 892         case LFUN_ALL_CHANGES_ACCEPT:
 893                 // select complete document
 894                 cursor_.reset(buffer_->inset());
 895                 cursor_.selHandle(true);
 896                 buffer_->text().cursorBottom(cursor_);
 897                 // accept everything in a single step to support atomic undo
 898                 buffer_->text().acceptOrRejectChanges(cursor_, LyXText::ACCEPT);
 899                 break;
 900
 901         case LFUN_ALL_CHANGES_REJECT:
 902                 // select complete document
 903                 cursor_.reset(buffer_->inset());
 904                 cursor_.selHandle(true);
 905                 buffer_->text().cursorBottom(cursor_);
 906                 // reject everything in a single step to support atomic undo
 907                 // Note: reject does not work recursively; the user may have to repeat the operation
 908                 buffer_->text().acceptOrRejectChanges(cursor_, LyXText::REJECT);
 909                 break;
 910
 911         case LFUN_WORD_FIND:
 912                 find(this, cmd);
 913                 break;
 914
 915         case LFUN_WORD_REPLACE:
 916                 replace(this, cmd);
 917                 break;
 918
 919         case LFUN_MARK_OFF:
 920                 cur.clearSelection();
 921                 cur.resetAnchor();
 922                 cur.message(from_utf8(N_("Mark off")));
 923                 break;
 924
 925         case LFUN_MARK_ON:
 926                 cur.clearSelection();
 927                 cur.mark() = true;
 928                 cur.resetAnchor();
 929                 cur.message(from_utf8(N_("Mark on")));
 930                 break;
 931
 932         case LFUN_MARK_TOGGLE:
 933                 cur.clearSelection();
 934                 if (cur.mark()) {
 935                         cur.mark() = false;
 936                         cur.message(from_utf8(N_("Mark removed")));
 937                 } else {
 938                         cur.mark() = true;
 939                         cur.message(from_utf8(N_("Mark set")));
 940                 }
 941                 cur.resetAnchor();
 942                 break;
 943
 944         case LFUN_SCREEN_RECENTER:
 945                 center();
 946                 break;
 947
 948         case LFUN_BIBTEX_DATABASE_ADD: {
 949                 LCursor tmpcur = cursor_;
 950                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 951                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 952                                                 InsetBase::BIBTEX_CODE);
 953                 if (inset) {
 954                         if (inset->addDatabase(to_utf8(cmd.argument())))
 955                                 buffer_->updateBibfilesCache();
 956                 }
 957                 break;
 958         }
 959
 960         case LFUN_BIBTEX_DATABASE_DEL: {
 961                 LCursor tmpcur = cursor_;
 962                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 963                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 964                                                 InsetBase::BIBTEX_CODE);
 965                 if (inset) {
 966                         if (inset->delDatabase(to_utf8(cmd.argument())))
 967                                 buffer_->updateBibfilesCache();
 968                 }
 969                 break;
 970         }
 971
 972         case LFUN_WORDS_COUNT: {
 973                 DocIterator from, to;
 974                 if (cur.selection()) {
 975                         from = cur.selectionBegin();
 976                         to = cur.selectionEnd();
 977                 } else {
 978                         from = doc_iterator_begin(buffer_->inset());
 979                         to = doc_iterator_end(buffer_->inset());
 980                 }
 981                 int const count = countWords(from, to);
 982                 docstring message;
 983                 if (count != 1) {
 984                         if (cur.selection())
 985                                 message = bformat(_("%1$d words in selection."),
 986                                           count);
 987                                 else
 988                                         message = bformat(_("%1$d words in document."),
 989                                                           count);
 990                 }
 991                 else {
 992                         if (cur.selection())
 993                                 message = _("One word in selection.");
 994                         else
 995                                 message = _("One word in document.");
 996                 }
 997
 998                 Alert::information(_("Count words"), message);
 999         }
1000                 break;
1001
1002         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1003                 // turn compression on/off
1004                 buffer_->params().compressed = !buffer_->params().compressed;
1005                 break;
1006
1007         case LFUN_NEXT_INSET_TOGGLE: {
1008                 // this is the real function we want to invoke
1009                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
1010                 // if there is an inset at cursor, see whether it
1011                 // wants to toggle.
1012                 InsetBase * inset = cur.nextInset();
1013                 if (inset && inset->isActive()) {
1014                         LCursor tmpcur = cur;
1015                         tmpcur.pushLeft(*inset);
1016                         inset->dispatch(tmpcur, tmpcmd);
1017                         if (tmpcur.result().dispatched()) {
1018                                 cur.dispatched();
1019                         }
1020                 }
1021                 // if it did not work, try the underlying inset.
1022                 if (!cur.result().dispatched())
1023                         cur.dispatch(tmpcmd);
1024
1025                 if (cur.result().dispatched())
1026                         cur.clearSelection();
1027
1028                 break;
1029         }
1030
1031         default:
1032                 updateFlags = Update::None;
1033         }
1034
1035         return updateFlags;
1036 }
1037
1038
1039 docstring const BufferView::requestSelection()
1040 {
1041         if (!buffer_)
1042                 return docstring();
1043
1044         LCursor & cur = cursor_;
1045
1046         if (!cur.selection()) {
1047                 xsel_cache_.set = false;
1048                 return docstring();
1049         }
1050
1051         if (!xsel_cache_.set ||
1052             cur.top() != xsel_cache_.cursor ||
1053             cur.anchor_.top() != xsel_cache_.anchor)
1054         {
1055                 xsel_cache_.cursor = cur.top();
1056                 xsel_cache_.anchor = cur.anchor_.top();
1057                 xsel_cache_.set = cur.selection();
1058                 return cur.selectionAsString(false);
1059         }
1060         return docstring();
1061 }
1062
1063
1064 void BufferView::clearSelection()
1065 {
1066         if (buffer_) {
1067                 cursor_.clearSelection();
1068                 // Clear the selection buffer. Otherwise a subsequent
1069                 // middle-mouse-button paste would use the selection buffer,
1070                 // not the more current external selection.
1071                 cap::clearSelection();
1072                 xsel_cache_.set = false;
1073                 // The buffer did not really change, but this causes the
1074                 // redraw we need because we cleared the selection above.
1075                 buffer_->changed();
1076         }
1077 }
1078
1079
1080 void BufferView::workAreaResize(int width, int height)
1081 {
1082         // Update from work area
1083         width_ = width;
1084         height_ = height;
1085
1086         // The complete text metrics will be redone.
1087         text_metrics_.clear();
1088
1089         if (buffer_)
1090                 resize();
1091 }
1092
1093
1094 InsetBase const * BufferView::getCoveringInset(LyXText const & text, int x, int y)
1095 {
1096         pit_type pit = text.getPitNearY(*this, y);
1097         BOOST_ASSERT(pit != -1);
1098         Paragraph const & par = text.getPar(pit);
1099
1100         LYXERR(Debug::DEBUG)
1101                 << BOOST_CURRENT_FUNCTION
1102                 << ": x: " << x
1103                 << " y: " << y
1104                 << "  pit: " << pit
1105                 << endl;
1106         InsetList::const_iterator iit = par.insetlist.begin();
1107         InsetList::const_iterator iend = par.insetlist.end();
1108         for (; iit != iend; ++iit) {
1109                 InsetBase * const inset = iit->inset;
1110                 if (inset->covers(*this, x, y)) {
1111                         if (!inset->descendable())
1112                                 // No need to go further down if the inset is not
1113                                 // descendable.
1114                                 return inset;
1115
1116                         size_t cell_number = inset->nargs();
1117                         // Check all the inner cell.
1118                         for (size_t i = 0; i != cell_number; ++i) {
1119                                 LyXText const * inner_text = inset->getText(i);
1120                                 if (inner_text) {
1121                                         // Try deeper.
1122                                         InsetBase const * inset_deeper =
1123                                                 getCoveringInset(*inner_text, x, y);
1124                                         if (inset_deeper)
1125                                                 return inset_deeper;
1126                                 }
1127                         }
1128
1129                         LYXERR(Debug::DEBUG)
1130                                 << BOOST_CURRENT_FUNCTION
1131                                 << ": Hit inset: " << inset << endl;
1132                         return inset;
1133                 }
1134         }
1135         LYXERR(Debug::DEBUG)
1136                 << BOOST_CURRENT_FUNCTION
1137                 << ": No inset hit. " << endl;
1138         return 0;
1139 }
1140
1141
1142 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
1143 {
1144         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1145
1146         // This is only called for mouse related events including
1147         // LFUN_FILE_OPEN generated by drag-and-drop.
1148         FuncRequest cmd = cmd0;
1149
1150         // E.g. Qt mouse press when no buffer
1151         if (!buffer_)
1152                 return false;
1153
1154         LCursor cur(*this);
1155         cur.push(buffer_->inset());
1156         cur.selection() = cursor_.selection();
1157
1158         // Either the inset under the cursor or the
1159         // surrounding LyXText will handle this event.
1160
1161         // make sure we stay within the screen...
1162         cmd.y = min(max(cmd.y, -1), height_);
1163
1164         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1165
1166                 // Get inset under mouse, if there is one.
1167                 InsetBase const * covering_inset =
1168                         getCoveringInset(buffer_->text(), cmd.x, cmd.y);
1169                 if (covering_inset == last_inset_)
1170                         // Same inset, no need to do anything...
1171                         return false;
1172
1173                 bool need_redraw = false;
1174                 // const_cast because of setMouseHover().
1175                 InsetBase * inset = const_cast<InsetBase *>(covering_inset);
1176                 if (last_inset_)
1177                         // Remove the hint on the last hovered inset (if any).
1178                         need_redraw |= last_inset_->setMouseHover(false);
1179                 if (inset)
1180                         // Highlighted the newly hovered inset (if any).
1181                         need_redraw |= inset->setMouseHover(true);
1182                 last_inset_ = inset;
1183
1184                 // if last metrics update was in singlepar mode, WorkArea::redraw() will
1185                 // not expose the button for redraw. We adjust here the metrics dimension
1186                 // to enable a full redraw.
1187                 // FIXME: It is possible to redraw only the area around the button!
1188                 if (need_redraw
1189                         && metrics_info_.update_strategy == SingleParUpdate) {
1190                         // FIXME: It should be possible to redraw only the area around
1191                         // the button by doing this:
1192                         //
1193                         //metrics_info_.singlepar = false;
1194                         //metrics_info_.y1 = ymin of button;
1195                         //metrics_info_.y2 = ymax of button;
1196                         //
1197                         // Unfortunately, rowpainter.C:paintText() does not distinguish
1198                         // between background updates and text updates. So we use the hammer
1199                         // solution for now. We could also avoid the updateMetrics() below
1200                         // by using the first and last pit of the CoordCache. Have a look
1201                         // at LyXText::getPitNearY() to see what I mean.
1202                         //
1203                         //metrics_info_.pit1 = first pit of CoordCache;
1204                         //metrics_info_.pit2 = last pit of CoordCache;
1205                         //metrics_info_.singlepar = false;
1206                         //metrics_info_.y1 = 0;
1207                         //metrics_info_.y2 = height_;
1208                         //
1209                         updateMetrics(false);
1210                 }
1211
1212                 // This event (moving without mouse click) is not passed further.
1213                 // This should be changed if it is further utilized.
1214                 return need_redraw;
1215         }
1216
1217         // Build temporary cursor.
1218         InsetBase * inset = buffer_->text().editXY(cur, cmd.x, cmd.y);
1219
1220         // Put anchor at the same position.
1221         cur.resetAnchor();
1222
1223         // Try to dispatch to an non-editable inset near this position
1224         // via the temp cursor. If the inset wishes to change the real
1225         // cursor it has to do so explicitly by using
1226         //  cur.bv().cursor() = cur;  (or similar)
1227         if (inset) {
1228                 inset->dispatch(cur, cmd);
1229         }
1230
1231         // Now dispatch to the temporary cursor. If the real cursor should
1232         // be modified, the inset's dispatch has to do so explicitly.
1233         if (!cur.result().dispatched())
1234                 cur.dispatch(cmd);
1235
1236         // Redraw if requested and necessary.
1237         if (cur.result().dispatched() && cur.result().update())
1238                 return update(cur.result().update());
1239
1240         return false;
1241 }
1242
1243
1244 void BufferView::scroll(int /*lines*/)
1245 {
1246 //      if (!buffer_)
1247 //              return;
1248 //
1249 //      LyXText const * t = &buffer_->text();
1250 //      int const line_height = defaultRowHeight();
1251 //
1252 //      // The new absolute coordinate
1253 //      int new_top_y = top_y() + lines * line_height;
1254 //
1255 //      // Restrict to a valid value
1256 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
1257 //      new_top_y = std::max(0, new_top_y);
1258 //
1259 //      scrollDocView(new_top_y);
1260 //
1261 }
1262
1263
1264 void BufferView::setCursorFromRow(int row)
1265 {
1266         int tmpid = -1;
1267         int tmppos = -1;
1268
1269         buffer_->texrow().getIdFromRow(row, tmpid, tmppos);
1270
1271         if (tmpid == -1)
1272                 buffer_->text().setCursor(cursor_, 0, 0);
1273         else
1274                 buffer_->text().setCursor(cursor_, buffer_->getParFromID(tmpid).pit(), tmppos);
1275 }
1276
1277
1278 void BufferView::gotoLabel(docstring const & label)
1279 {
1280         for (InsetIterator it = inset_iterator_begin(buffer_->inset()); it; ++it) {
1281                 vector<docstring> labels;
1282                 it->getLabelList(*buffer_, labels);
1283                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1284                         setCursor(it);
1285                         update();
1286                         return;
1287                 }
1288         }
1289 }
1290
1291
1292 TextMetrics const & BufferView::textMetrics(LyXText const * t) const
1293 {
1294         return const_cast<BufferView *>(this)->textMetrics(t);
1295 }
1296
1297
1298 TextMetrics & BufferView::textMetrics(LyXText const * t)
1299 {
1300         TextMetricsCache::iterator tmc_it  = text_metrics_.find(t);
1301         if (tmc_it == text_metrics_.end()) {
1302                 tmc_it = text_metrics_.insert(
1303                         make_pair(t, TextMetrics(this, const_cast<LyXText *>(t)))).first;
1304         }
1305         return tmc_it->second;
1306 }
1307
1308
1309 ParagraphMetrics const & BufferView::parMetrics(LyXText const * t,
1310                 pit_type pit) const
1311 {
1312         return textMetrics(t).parMetrics(pit);
1313 }
1314
1315
1316 int BufferView::workHeight() const
1317 {
1318         return height_;
1319 }
1320
1321
1322 void BufferView::setCursor(DocIterator const & dit)
1323 {
1324         size_t const n = dit.depth();
1325         for (size_t i = 0; i < n; ++i)
1326                 dit[i].inset().edit(cursor_, true);
1327
1328         cursor_.setCursor(dit);
1329         cursor_.selection() = false;
1330 }
1331
1332
1333 bool BufferView::checkDepm(LCursor & cur, LCursor & old)
1334 {
1335         // Would be wrong to delete anything if we have a selection.
1336         if (cur.selection())
1337                 return false;
1338
1339         bool need_anchor_change = false;
1340         bool changed = cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1341                 need_anchor_change);
1342
1343         if (need_anchor_change)
1344                 cur.resetAnchor();
1345
1346         if (!changed)
1347                 return false;
1348
1349         updateLabels(*buffer_);
1350
1351         updateMetrics(false);
1352         buffer_->changed();
1353         return true;
1354 }
1355
1356
1357 bool BufferView::mouseSetCursor(LCursor & cur)
1358 {
1359         BOOST_ASSERT(&cur.bv() == this);
1360
1361         // Has the cursor just left the inset?
1362         bool badcursor = false;
1363         bool leftinset = (&cursor_.inset() != &cur.inset());
1364         if (leftinset)
1365                 badcursor = cursor_.inset().notifyCursorLeaves(cursor_);
1366
1367         // do the dEPM magic if needed
1368         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
1369         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
1370         // the leftinset bool would not be necessary (badcursor instead).
1371         bool update = leftinset;
1372         if (!badcursor && cursor_.inTexted())
1373                 update |= checkDepm(cur, cursor_);
1374
1375         // if the cursor was in an empty script inset and the new
1376         // position is in the nucleus of the inset, notifyCursorLeaves
1377         // will kill the script inset itself. So we check all the
1378         // elements of the cursor to make sure that they are correct.
1379         // For an example, see bug 2933:
1380         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1381         // The code below could maybe be moved to a DocIterator method.
1382         //lyxerr << "cur before " << cur <<std::endl;
1383         DocIterator dit(cur.inset());
1384         dit.push_back(cur.bottom());
1385         size_t i = 1;
1386         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1387                 dit.push_back(cur[i]);
1388                 ++i;
1389         }
1390         //lyxerr << "5 cur after" << dit <<std::endl;
1391
1392         cursor_.setCursor(dit);
1393         cursor_.clearSelection();
1394         finishUndo();
1395         return update;
1396 }
1397
1398
1399 void BufferView::putSelectionAt(DocIterator const & cur,
1400                                 int length, bool backwards)
1401 {
1402         cursor_.clearSelection();
1403
1404         setCursor(cur);
1405
1406         if (length) {
1407                 if (backwards) {
1408                         cursor_.pos() += length;
1409                         cursor_.setSelection(cursor_, -length);
1410                 } else
1411                         cursor_.setSelection(cursor_, length);
1412                 cap::saveSelection(cursor_);
1413         }
1414 }
1415
1416
1417 LCursor & BufferView::cursor()
1418 {
1419         return cursor_;
1420 }
1421
1422
1423 LCursor const & BufferView::cursor() const
1424 {
1425         return cursor_;
1426 }
1427
1428
1429 pit_type BufferView::anchor_ref() const
1430 {
1431         return anchor_ref_;
1432 }
1433
1434
1435 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1436 {
1437         return metrics_info_;
1438 }
1439
1440
1441 // FIXME: We should split-up updateMetrics() for the singlepar case.
1442 void BufferView::updateMetrics(bool singlepar)
1443 {
1444         LyXText & buftext = buffer_->text();
1445         TextMetrics & tm = textMetrics(&buftext);
1446         pit_type size = int(buftext.paragraphs().size());
1447
1448         if (anchor_ref_ > int(buftext.paragraphs().size() - 1)) {
1449                 anchor_ref_ = int(buftext.paragraphs().size() - 1);
1450                 offset_ref_ = 0;
1451         }
1452
1453         // If the paragraph metrics has changed, we can not
1454         // use the singlepar optimisation.
1455         if (singlepar
1456                 // In Single Paragraph mode, rebreak only
1457                 // the (main text, not inset!) paragraph containing the cursor.
1458                 // (if this paragraph contains insets etc., rebreaking will
1459                 // recursively descend)
1460                 && tm.redoParagraph(cursor_.bottom().pit()))
1461                 singlepar = false;
1462
1463         pit_type const pit = anchor_ref_;
1464         int pit1 = pit;
1465         int pit2 = pit;
1466         size_t const npit = buftext.paragraphs().size();
1467
1468         // Rebreak anchor paragraph.
1469         if (!singlepar)
1470                 tm.redoParagraph(pit);
1471
1472         // Clear out the position cache in case of full screen redraw.
1473         if (!singlepar)
1474                 coord_cache_.clear();
1475
1476         int y0 = tm.parMetrics(pit).ascent() - offset_ref_;
1477
1478         // Redo paragraphs above anchor if necessary.
1479         int y1 = y0;
1480         while (y1 > 0 && pit1 > 0) {
1481                 y1 -= tm.parMetrics(pit1).ascent();
1482                 --pit1;
1483                 if (!singlepar)
1484                         tm.redoParagraph(pit1);
1485                 y1 -= tm.parMetrics(pit1).descent();
1486         }
1487
1488
1489         // Take care of ascent of first line
1490         y1 -= tm.parMetrics(pit1).ascent();
1491
1492         // Normalize anchor for next time
1493         anchor_ref_ = pit1;
1494         offset_ref_ = -y1;
1495
1496         // Grey at the beginning is ugly
1497         if (pit1 == 0 && y1 > 0) {
1498                 y0 -= y1;
1499                 y1 = 0;
1500                 anchor_ref_ = 0;
1501         }
1502
1503         // Redo paragraphs below the anchor if necessary.
1504         int y2 = y0;
1505         while (y2 < height_ && pit2 < int(npit) - 1) {
1506                 y2 += tm.parMetrics(pit2).descent();
1507                 ++pit2;
1508                 if (!singlepar)
1509                         tm.redoParagraph(pit2);
1510                 y2 += tm.parMetrics(pit2).ascent();
1511         }
1512
1513         // Take care of descent of last line
1514         y2 += tm.parMetrics(pit2).descent();
1515
1516         // The coordinates of all these paragraphs are correct, cache them
1517         int y = y1;
1518         CoordCache::InnerParPosCache & parPos = coord_cache_.parPos()[&buftext];
1519         for (pit_type pit = pit1; pit <= pit2; ++pit) {
1520                 ParagraphMetrics const & pm = tm.parMetrics(pit);
1521                 y += pm.ascent();
1522                 parPos[pit] = Point(0, y);
1523                 if (singlepar && pit == cursor_.bottom().pit()) {
1524                         // In Single Paragraph mode, collect here the
1525                         // y1 and y2 of the (one) paragraph the cursor is in
1526                         y1 = y - pm.ascent();
1527                         y2 = y + pm.descent();
1528                 }
1529                 y += pm.descent();
1530         }
1531
1532         if (singlepar) {
1533                 // collect cursor paragraph iter bounds
1534                 pit1 = cursor_.bottom().pit();
1535                 pit2 = cursor_.bottom().pit();
1536         }
1537
1538         LYXERR(Debug::DEBUG)
1539                 << BOOST_CURRENT_FUNCTION
1540                 << " y1: " << y1
1541                 << " y2: " << y2
1542                 << " pit1: " << pit1
1543                 << " pit2: " << pit2
1544                 << " npit: " << npit
1545                 << " singlepar: " << singlepar
1546                 << "size: " << size
1547                 << endl;
1548
1549         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2,
1550                 singlepar? SingleParUpdate: FullScreenUpdate, size);
1551
1552         if (lyxerr.debugging(Debug::WORKAREA)) {
1553                 LYXERR(Debug::WORKAREA) << "BufferView::updateMetrics" << endl;
1554                 coord_cache_.dump();
1555         }
1556 }
1557
1558
1559 void BufferView::menuInsertLyXFile(string const & filenm)
1560 {
1561         BOOST_ASSERT(cursor_.inTexted());
1562         string filename = filenm;
1563
1564         if (filename.empty()) {
1565                 // Launch a file browser
1566                 // FIXME UNICODE
1567                 string initpath = lyxrc.document_path;
1568
1569                 if (buffer_) {
1570                         string const trypath = buffer_->filePath();
1571                         // If directory is writeable, use this as default.
1572                         if (isDirWriteable(FileName(trypath)))
1573                                 initpath = trypath;
1574                 }
1575
1576                 // FIXME UNICODE
1577                 FileDialog fileDlg(_("Select LyX document to insert"),
1578                         LFUN_FILE_INSERT,
1579                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1580                         make_pair(_("Examples|#E#e"), from_utf8(addPath(package().system_support().absFilename(), "examples"))));
1581
1582                 FileDialog::Result result =
1583                         fileDlg.open(from_utf8(initpath),
1584                                      FileFilterList(_("LyX Documents (*.lyx)")),
1585                                      docstring());
1586
1587                 if (result.first == FileDialog::Later)
1588                         return;
1589
1590                 // FIXME UNICODE
1591                 filename = to_utf8(result.second);
1592
1593                 // check selected filename
1594                 if (filename.empty()) {
1595                         // emit message signal.
1596                         message(_("Canceled."));
1597                         return;
1598                 }
1599         }
1600
1601         // Get absolute path of file and add ".lyx"
1602         // to the filename if necessary
1603         filename = fileSearch(string(), filename, "lyx").absFilename();
1604
1605         docstring const disp_fn = makeDisplayPath(filename);
1606         // emit message signal.
1607         message(bformat(_("Inserting document %1$s..."), disp_fn));
1608
1609         docstring res;
1610         Buffer buf("", false);
1611         if (lyx::loadLyXFile(&buf, FileName(filename))) {
1612                 ErrorList & el = buffer_->errorList("Parse");
1613                 // Copy the inserted document error list into the current buffer one.
1614                 el = buf.errorList("Parse");
1615                 recordUndo(cursor_);
1616                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1617                                              buf.params().textclass, el);
1618                 res = _("Document %1$s inserted.");
1619         } else
1620                 res = _("Could not insert document %1$s");
1621
1622         // emit message signal.
1623         message(bformat(res, disp_fn));
1624         buffer_->errors("Parse");
1625         resize();
1626 }
1627
1628 } // namespace lyx