src/BufferView.cpp

   1 /**
   2  * \file BufferView.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Alfredo Braunstein
   7  * \author Lars Gullik Bjønnes
   8  * \author John Levon
   9  * \author André Pönitz
  10  * \author Jürgen Vigna
  11  *
  12  * Full author contact details are available in file CREDITS.
  13  */
  14
  15 #include <config.h>
  16
  17 #include "BufferView.h"
  18
  19 #include "Buffer.h"
  20 #include "buffer_funcs.h"
  21 #include "BufferList.h"
  22 #include "BufferParams.h"
  23 #include "bufferview_funcs.h"
  24 #include "CoordCache.h"
  25 #include "CutAndPaste.h"
  26 #include "debug.h"
  27 #include "DispatchResult.h"
  28 #include "ErrorList.h"
  29 #include "factory.h"
  30 #include "FloatList.h"
  31 #include "FuncRequest.h"
  32 #include "FuncStatus.h"
  33 #include "gettext.h"
  34 #include "Intl.h"
  35 #include "InsetIterator.h"
  36 #include "Language.h"
  37 #include "LaTeXFeatures.h"
  38 #include "callback.h" // added for Dispatch functions
  39 #include "LyX.h"
  40 #include "lyxfind.h"
  41 #include "LyXFunc.h"
  42 #include "Layout.h"
  43 #include "Text.h"
  44 #include "TextClass.h"
  45 #include "LyXRC.h"
  46 #include "Session.h"
  47 #include "Paragraph.h"
  48 #include "paragraph_funcs.h"
  49 #include "ParagraphParameters.h"
  50 #include "ParIterator.h"
  51 #include "TexRow.h"
  52 #include "toc.h"
  53 #include "Undo.h"
  54 #include "VSpace.h"
  55 #include "WordLangTuple.h"
  56 #include "MetricsInfo.h"
  57
  58 #include "insets/InsetBibtex.h"
  59 #include "insets/InsetCommand.h" // ChangeRefs
  60 #include "insets/InsetRef.h"
  61 #include "insets/InsetText.h"
  62
  63 #include "frontends/alert.h"
  64 #include "frontends/FileDialog.h"
  65 #include "frontends/FontMetrics.h"
  66
  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 using std::distance;
  82 using std::endl;
  83 using std::istringstream;
  84 using std::make_pair;
  85 using std::min;
  86 using std::max;
  87 using std::mem_fun_ref;
  88 using std::string;
  89 using std::vector;
  90
  91
  92 namespace lyx {
  93
  94 using support::addPath;
  95 using support::bformat;
  96 using support::FileFilterList;
  97 using support::FileName;
  98 using support::fileSearch;
  99 using support::isDirWriteable;
 100 using support::isFileReadable;
 101 using support::makeDisplayPath;
 102 using support::package;
 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(Cursor & cur, Inset::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 current selection if any
 153                 cap::saveSelection(cursor_);
 154                 // Save the actual cursor position and anchor inside the
 155                 // buffer so that it can be restored in case we rechange
 156                 // to this buffer later on.
 157                 buffer_->saveCursor(cursor_.selectionBegin(),
 158                                     cursor_.selectionEnd());
 159                 // update bookmark pit of the current buffer before switch
 160                 for (size_t i = 0; i < LyX::ref().session().bookmarks().size(); ++i) {
 161                         BookmarksSection::Bookmark const & bm = LyX::ref().session().bookmarks().bookmark(i);
 162                         if (buffer()->fileName() != bm.filename.absFilename())
 163                                 continue;
 164                         // if top_id or bottom_pit, bottom_pos has been changed, update bookmark
 165                         // see http://bugzilla.lyx.org/show_bug.cgi?id=3092
 166                         pit_type new_pit;
 167                         pos_type new_pos;
 168                         int new_id;
 169                         boost::tie(new_pit, new_pos, new_id) = moveToPosition(bm.bottom_pit, bm.bottom_pos, bm.top_id, bm.top_pos);
 170                         if (bm.bottom_pit != new_pit || bm.bottom_pos != new_pos || bm.top_id != new_id )
 171                                 const_cast<BookmarksSection::Bookmark &>(bm).updatePos(new_pit, new_pos, new_id);
 172                 }
 173                 // current buffer is going to be switched-off, save cursor pos
 174                 // Ideally, the whole cursor stack should be saved, but session
 175                 // currently can only handle bottom (whole document) level pit and pos.
 176                 // That is to say, if a cursor is in a nested inset, it will be
 177                 // restore to the left of the top level inset.
 178                 LyX::ref().session().lastFilePos().save(FileName(buffer_->fileName()),
 179                         boost::tie(cursor_.bottom().pit(), cursor_.bottom().pos()) );
 180         }
 181
 182         // If we're quitting lyx, don't bother updating stuff
 183         if (quitting) {
 184                 buffer_ = 0;
 185                 return;
 186         }
 187
 188         //FIXME Fix for bug 3440 is here.
 189         // If we are closing current buffer, switch to the first in
 190         // buffer list.
 191         if (!b) {
 192                 LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
 193                                     << " No Buffer!" << endl;
 194                 // We are closing the buffer, use the first buffer as current
 195                 //FIXME 3440
 196                 // if (last_buffer_) buffer_ = last_buffer_;
 197                 // also check that this is in theBufferList()?
 198                 buffer_ = theBufferList().first();
 199         } else {
 200                 //FIXME 3440
 201                 // last_buffer = buffer_;
 202                 // Set current buffer
 203                 buffer_ = b;
 204         }
 205
 206         // Reset old cursor
 207         cursor_ = Cursor(*this);
 208         anchor_ref_ = 0;
 209         offset_ref_ = 0;
 210
 211         if (!buffer_)
 212                 return;
 213
 214         LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
 215                                         << "Buffer addr: " << buffer_ << endl;
 216         cursor_.push(buffer_->inset());
 217         cursor_.resetAnchor();
 218         buffer_->text().setCurrentFont(cursor_);
 219
 220         // Update the metrics now that we have a proper Cursor.
 221         updateMetrics(false);
 222
 223         // FIXME: This code won't be needed once we switch to
 224         // "one Buffer" / "one BufferView".
 225         if (buffer_->getCursor().size() > 0 &&
 226                         buffer_->getAnchor().size() > 0)
 227         {
 228                 cursor_.setCursor(buffer_->getAnchor().asDocIterator(&(buffer_->inset())));
 229                 cursor_.resetAnchor();
 230                 cursor_.setCursor(buffer_->getCursor().asDocIterator(&(buffer_->inset())));
 231                 cursor_.setSelection();
 232                 // do not set selection to the new buffer because we
 233                 // only paste recent selection.
 234
 235                 // Make sure that the restored cursor is not broken. This can happen for
 236                 // example if this Buffer has been modified by another view.
 237                 cursor_.fixIfBroken();
 238
 239                 if (fitCursor())
 240                         // Update the metrics if the cursor new position was off screen.
 241                         updateMetrics(false);
 242         }
 243
 244         if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 245                 graphics::Previews::get().generateBufferPreviews(*buffer_);
 246 }
 247
 248
 249 void BufferView::resize()
 250 {
 251         if (!buffer_)
 252                 return;
 253
 254         LYXERR(Debug::DEBUG) << BOOST_CURRENT_FUNCTION << endl;
 255
 256         updateMetrics(false);
 257 }
 258
 259
 260 bool BufferView::fitCursor()
 261 {
 262         if (bv_funcs::status(this, cursor_) == bv_funcs::CUR_INSIDE) {
 263                 frontend::FontMetrics const & fm =
 264                         theFontMetrics(cursor_.getFont());
 265                 int const asc = fm.maxAscent();
 266                 int const des = fm.maxDescent();
 267                 Point const p = bv_funcs::getPos(*this, cursor_, cursor_.boundary());
 268                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 269                         return false;
 270         }
 271         center();
 272         return true;
 273 }
 274
 275
 276 bool BufferView::multiParSel()
 277 {
 278         if (!cursor_.selection())
 279                 return false;
 280         bool ret = multiparsel_cache_;
 281         multiparsel_cache_ = cursor_.selBegin().pit() != cursor_.selEnd().pit();
 282         // Either this, or previous selection spans paragraphs
 283         return ret || multiparsel_cache_;
 284 }
 285
 286
 287 bool BufferView::update(Update::flags flags)
 288 {
 289         // last_inset_ points to the last visited inset. This pointer may become
 290         // invalid because of keyboard editing. Since all such operations
 291         // causes screen update(), I reset last_inset_ to avoid such a problem.
 292         last_inset_ = 0;
 293         // This is close to a hot-path.
 294         LYXERR(Debug::DEBUG)
 295                 << BOOST_CURRENT_FUNCTION
 296                 << "[fitcursor = " << (flags & Update::FitCursor)
 297                 << ", forceupdate = " << (flags & Update::Force)
 298                 << ", singlepar = " << (flags & Update::SinglePar)
 299                 << "]  buffer: " << buffer_ << endl;
 300
 301         // Check needed to survive LyX startup
 302         if (!buffer_)
 303                 return false;
 304
 305         LYXERR(Debug::WORKAREA) << "BufferView::update" << std::endl;
 306
 307         // Update macro store
 308         if (!(cursor().inMathed() && cursor().inMacroMode()))
 309                 buffer_->buildMacros();
 310
 311         // Now do the first drawing step if needed. This consists on updating
 312         // the CoordCache in updateMetrics().
 313         // The second drawing step is done in WorkArea::redraw() if needed.
 314
 315         // Case when no explicit update is requested.
 316         if (!flags) {
 317                 // no need to redraw anything.
 318                 metrics_info_.update_strategy = NoScreenUpdate;
 319                 return false;
 320         }
 321
 322         if (flags == Update::Decoration) {
 323                 metrics_info_.update_strategy = DecorationUpdate;
 324                 return true;
 325         }
 326
 327         if (flags == Update::FitCursor
 328                 || flags == (Update::Decoration | Update::FitCursor)) {
 329                 bool const fit_cursor = fitCursor();
 330                 // tell the frontend to update the screen if needed.
 331                 if (fit_cursor) {
 332                         updateMetrics(false);
 333                         return true;
 334                 }
 335                 if (flags & Update::Decoration) {
 336                         metrics_info_.update_strategy = DecorationUpdate;
 337                         return true;
 338                 }
 339                 // no screen update is needed.
 340                 metrics_info_.update_strategy = NoScreenUpdate;
 341                 return false;
 342         }
 343
 344         bool full_metrics = flags & Update::Force;
 345         if (flags & Update::MultiParSel)
 346                 full_metrics |= multiParSel();
 347
 348         bool const single_par = !full_metrics;
 349         updateMetrics(single_par);
 350
 351         if (flags & Update::FitCursor && fitCursor())
 352                 updateMetrics(false);
 353
 354         // tell the frontend to update the screen.
 355         return true;
 356 }
 357
 358
 359 void BufferView::updateScrollbar()
 360 {
 361         if (!buffer_) {
 362                 LYXERR(Debug::DEBUG) << BOOST_CURRENT_FUNCTION
 363                                      << " no text in updateScrollbar" << endl;
 364                 scrollbarParameters_.reset();
 365                 return;
 366         }
 367
 368         Text & t = buffer_->text();
 369         TextMetrics & tm = text_metrics_[&t];
 370
 371         int const parsize = int(t.paragraphs().size() - 1);
 372         if (anchor_ref_ >  parsize)  {
 373                 anchor_ref_ = parsize;
 374                 offset_ref_ = 0;
 375         }
 376
 377         LYXERR(Debug::GUI)
 378                 << BOOST_CURRENT_FUNCTION
 379                 << " Updating scrollbar: height: " << t.paragraphs().size()
 380                 << " curr par: " << cursor_.bottom().pit()
 381                 << " default height " << defaultRowHeight() << endl;
 382
 383         // It would be better to fix the scrollbar to understand
 384         // values in [0..1] and divide everything by wh
 385
 386         // estimated average paragraph height:
 387         if (wh_ == 0)
 388                 wh_ = height_ / 4;
 389
 390         int h = tm.parMetrics(anchor_ref_).height();
 391
 392         // Normalize anchor/offset (MV):
 393         while (offset_ref_ > h && anchor_ref_ < parsize) {
 394                 anchor_ref_++;
 395                 offset_ref_ -= h;
 396                 h = tm.parMetrics(anchor_ref_).height();
 397         }
 398         // Look at paragraph heights on-screen
 399         int sumh = 0;
 400         int nh = 0;
 401         for (pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 402                 if (sumh > height_)
 403                         break;
 404                 int const h2 = tm.parMetrics(pit).height();
 405                 sumh += h2;
 406                 nh++;
 407         }
 408
 409         BOOST_ASSERT(nh);
 410         int const hav = sumh / nh;
 411         // More realistic average paragraph height
 412         if (hav > wh_)
 413                 wh_ = hav;
 414
 415         BOOST_ASSERT(h);
 416         scrollbarParameters_.height = (parsize + 1) * wh_;
 417         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 418         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 419 }
 420
 421
 422 ScrollbarParameters const & BufferView::scrollbarParameters() const
 423 {
 424         return scrollbarParameters_;
 425 }
 426
 427
 428 void BufferView::scrollDocView(int value)
 429 {
 430         LYXERR(Debug::GUI) << BOOST_CURRENT_FUNCTION
 431                            << "[ value = " << value << "]" << endl;
 432
 433         if (!buffer_)
 434                 return;
 435
 436         Text & t = buffer_->text();
 437         TextMetrics & tm = text_metrics_[&t];
 438
 439         float const bar = value / float(wh_ * t.paragraphs().size());
 440
 441         anchor_ref_ = int(bar * t.paragraphs().size());
 442         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 443                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 444
 445         tm.redoParagraph(anchor_ref_);
 446         int const h = tm.parMetrics(anchor_ref_).height();
 447         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 448         updateMetrics(false);
 449 }
 450
 451
 452 void BufferView::setCursorFromScrollbar()
 453 {
 454         if (!buffer_)
 455                 return;
 456
 457         Text & t = buffer_->text();
 458
 459         int const height = 2 * defaultRowHeight();
 460         int const first = height;
 461         int const last = height_ - height;
 462         Cursor & cur = cursor_;
 463
 464         bv_funcs::CurStatus st = bv_funcs::status(this, cur);
 465
 466         switch (st) {
 467         case bv_funcs::CUR_ABOVE:
 468                 // We reset the cursor because bv_funcs::status() does not
 469                 // work when the cursor is within mathed.
 470                 cur.reset(buffer_->inset());
 471                 t.setCursorFromCoordinates(cur, 0, first);
 472                 cur.clearSelection();
 473                 break;
 474         case bv_funcs::CUR_BELOW:
 475                 // We reset the cursor because bv_funcs::status() does not
 476                 // work when the cursor is within mathed.
 477                 cur.reset(buffer_->inset());
 478                 t.setCursorFromCoordinates(cur, 0, last);
 479                 cur.clearSelection();
 480                 break;
 481         case bv_funcs::CUR_INSIDE:
 482                 int const y = bv_funcs::getPos(*this, cur, cur.boundary()).y_;
 483                 int const newy = min(last, max(y, first));
 484                 if (y != newy) {
 485                         cur.reset(buffer_->inset());
 486                         t.setCursorFromCoordinates(cur, 0, newy);
 487                 }
 488         }
 489 }
 490
 491
 492 Change const BufferView::getCurrentChange() const
 493 {
 494         if (!cursor_.selection())
 495                 return Change(Change::UNCHANGED);
 496
 497         DocIterator dit = cursor_.selectionBegin();
 498         return dit.paragraph().lookupChange(dit.pos());
 499 }
 500
 501
 502 void BufferView::saveBookmark(unsigned int idx)
 503 {
 504         // tenatively save bookmark, id and pos will be used to
 505         // acturately locate a bookmark in a 'live' lyx session.
 506         // pit and pos will be updated with bottom level pit/pos
 507         // when lyx exits.
 508         LyX::ref().session().bookmarks().save(
 509                 FileName(buffer_->fileName()),
 510                 cursor_.bottom().pit(),
 511                 cursor_.bottom().pos(),
 512                 cursor_.paragraph().id(),
 513                 cursor_.pos(),
 514                 idx
 515         );
 516         if (idx)
 517                 // emit message signal.
 518                 message(_("Save bookmark"));
 519 }
 520
 521
 522 boost::tuple<pit_type, pos_type, int> BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 523         int top_id, pos_type top_pos)
 524 {
 525         cursor_.clearSelection();
 526
 527         // if a valid par_id is given, try it first
 528         // This is the case for a 'live' bookmark when unique paragraph ID
 529         // is used to track bookmarks.
 530         if (top_id > 0) {
 531                 ParIterator par = buffer_->getParFromID(top_id);
 532                 if (par != buffer_->par_iterator_end()) {
 533                         DocIterator dit = makeDocIterator(par, min(par->size(), top_pos));
 534                         // Some slices of the iterator may not be
 535                         // reachable (e.g. closed collapsable inset)
 536                         // so the dociterator may need to be
 537                         // shortened. Otherwise, setCursor may crash
 538                         // lyx when the cursor can not be set to these
 539                         // insets.
 540                         size_t const n = dit.depth();
 541                         for (size_t i = 0; i < n; ++i)
 542                                 if (dit[i].inset().editable() != Inset::HIGHLY_EDITABLE) {
 543                                         dit.resize(i);
 544                                         break;
 545                                 }
 546                         setCursor(dit);
 547                         // Note: return bottom (document) level pit.
 548                         return boost::make_tuple(cursor_.bottom().pit(), cursor_.bottom().pos(), top_id);
 549                 }
 550         }
 551         // if top_id == 0, or searching through top_id failed
 552         // This is the case for a 'restored' bookmark when only bottom
 553         // (document level) pit was saved. Because of this, bookmark
 554         // restoration is inaccurate. If a bookmark was within an inset,
 555         // it will be restored to the left of the outmost inset that contains
 556         // the bookmark.
 557         if (static_cast<size_t>(bottom_pit) < buffer_->paragraphs().size()) {
 558                 DocIterator it = doc_iterator_begin(buffer_->inset());
 559                 it.pit() = bottom_pit;
 560                 it.pos() = min(bottom_pos, it.paragraph().size());
 561                 setCursor(it);
 562                 return boost::make_tuple(it.pit(), it.pos(),
 563                                          it.paragraph().id());
 564         }
 565         // both methods fail
 566         return boost::make_tuple(pit_type(0), pos_type(0), 0);
 567 }
 568
 569
 570 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 571 {
 572         if (lyxrc.rtl_support) {
 573                 if (cursor_.innerText()->real_current_font.isRightToLeft()) {
 574                         if (intl_->keymap == Intl::PRIMARY)
 575                                 intl_->keyMapSec();
 576                 } else {
 577                         if (intl_->keymap == Intl::SECONDARY)
 578                                 intl_->keyMapPrim();
 579                 }
 580         }
 581
 582         intl_->getTransManager().translateAndInsert(c, t, cur);
 583 }
 584
 585
 586 int BufferView::workWidth() const
 587 {
 588         return width_;
 589 }
 590
 591
 592 void BufferView::center()
 593 {
 594         CursorSlice & bot = cursor_.bottom();
 595         TextMetrics & tm = text_metrics_[bot.text()];
 596         pit_type const pit = bot.pit();
 597         tm.redoParagraph(pit);
 598         ParagraphMetrics const & pm = tm.parMetrics(pit);
 599         anchor_ref_ = pit;
 600         offset_ref_ = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary()).y_
 601                 + pm.ascent() - height_ / 2;
 602 }
 603
 604
 605 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 606 {
 607         FuncStatus flag;
 608
 609         Cursor & cur = cursor_;
 610
 611         switch (cmd.action) {
 612
 613         case LFUN_UNDO:
 614                 flag.enabled(!buffer_->undostack().empty());
 615                 break;
 616         case LFUN_REDO:
 617                 flag.enabled(!buffer_->redostack().empty());
 618                 break;
 619         case LFUN_FILE_INSERT:
 620         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 621         case LFUN_FILE_INSERT_PLAINTEXT:
 622         case LFUN_BOOKMARK_SAVE:
 623                 // FIXME: Actually, these LFUNS should be moved to Text
 624                 flag.enabled(cur.inTexted());
 625                 break;
 626         case LFUN_FONT_STATE:
 627         case LFUN_LABEL_INSERT:
 628         case LFUN_PARAGRAPH_GOTO:
 629         // FIXME handle non-trivially
 630         case LFUN_OUTLINE_UP:
 631         case LFUN_OUTLINE_DOWN:
 632         case LFUN_OUTLINE_IN:
 633         case LFUN_OUTLINE_OUT:
 634         case LFUN_NOTE_NEXT:
 635         case LFUN_REFERENCE_NEXT:
 636         case LFUN_WORD_FIND:
 637         case LFUN_WORD_REPLACE:
 638         case LFUN_MARK_OFF:
 639         case LFUN_MARK_ON:
 640         case LFUN_MARK_TOGGLE:
 641         case LFUN_SCREEN_RECENTER:
 642         case LFUN_BIBTEX_DATABASE_ADD:
 643         case LFUN_BIBTEX_DATABASE_DEL:
 644         case LFUN_WORDS_COUNT:
 645         case LFUN_NEXT_INSET_TOGGLE:
 646                 flag.enabled(true);
 647                 break;
 648
 649         case LFUN_LABEL_GOTO: {
 650                 flag.enabled(!cmd.argument().empty()
 651                     || getInsetByCode<InsetRef>(cur, Inset::REF_CODE));
 652                 break;
 653         }
 654
 655         case LFUN_CHANGES_TRACK:
 656                 flag.enabled(true);
 657                 flag.setOnOff(buffer_->params().trackChanges);
 658                 break;
 659
 660         case LFUN_CHANGES_OUTPUT:
 661                 flag.enabled(buffer_);
 662                 flag.setOnOff(buffer_->params().outputChanges);
 663                 break;
 664
 665         case LFUN_CHANGES_MERGE:
 666         case LFUN_CHANGE_NEXT:
 667         case LFUN_ALL_CHANGES_ACCEPT:
 668         case LFUN_ALL_CHANGES_REJECT:
 669                 // TODO: context-sensitive enabling of LFUNs
 670                 // In principle, these command should only be enabled if there
 671                 // is a change in the document. However, without proper
 672                 // optimizations, this will inevitably result in poor performance.
 673                 flag.enabled(buffer_);
 674                 break;
 675
 676         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 677                 flag.setOnOff(buffer_->params().compressed);
 678                 break;
 679         }
 680
 681         default:
 682                 flag.enabled(false);
 683         }
 684
 685         return flag;
 686 }
 687
 688
 689 Update::flags BufferView::dispatch(FuncRequest const & cmd)
 690 {
 691         //lyxerr << BOOST_CURRENT_FUNCTION
 692         //       << [ cmd = " << cmd << "]" << endl;
 693
 694         // Make sure that the cached BufferView is correct.
 695         LYXERR(Debug::ACTION) << BOOST_CURRENT_FUNCTION
 696                 << " action[" << cmd.action << ']'
 697                 << " arg[" << to_utf8(cmd.argument()) << ']'
 698                 << " x[" << cmd.x << ']'
 699                 << " y[" << cmd.y << ']'
 700                 << " button[" << cmd.button() << ']'
 701                 << endl;
 702
 703         // FIXME: this should not be possible.
 704         if (!buffer_)
 705                 return Update::None;
 706
 707         Cursor & cur = cursor_;
 708         // Default Update flags.
 709         Update::flags updateFlags = Update::Force | Update::FitCursor;
 710
 711         switch (cmd.action) {
 712
 713         case LFUN_UNDO:
 714                 cur.message(_("Undo"));
 715                 cur.clearSelection();
 716                 if (!textUndo(*this)) {
 717                         cur.message(_("No further undo information"));
 718                         updateFlags = Update::None;
 719                 }
 720                 break;
 721
 722         case LFUN_REDO:
 723                 cur.message(_("Redo"));
 724                 cur.clearSelection();
 725                 if (!textRedo(*this)) {
 726                         cur.message(_("No further redo information"));
 727                         updateFlags = Update::None;
 728                 }
 729                 break;
 730
 731         case LFUN_FILE_INSERT:
 732                 // FIXME UNICODE
 733                 menuInsertLyXFile(to_utf8(cmd.argument()));
 734                 break;
 735
 736         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 737                 // FIXME UNICODE
 738                 insertPlaintextFile(this, to_utf8(cmd.argument()), true);
 739                 break;
 740
 741         case LFUN_FILE_INSERT_PLAINTEXT:
 742                 // FIXME UNICODE
 743                 insertPlaintextFile(this, to_utf8(cmd.argument()), false);
 744                 break;
 745
 746         case LFUN_FONT_STATE:
 747                 cur.message(cur.currentState());
 748                 break;
 749
 750         case LFUN_BOOKMARK_SAVE:
 751                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 752                 break;
 753
 754         case LFUN_LABEL_GOTO: {
 755                 docstring label = cmd.argument();
 756                 if (label.empty()) {
 757                         InsetRef * inset =
 758                                 getInsetByCode<InsetRef>(cursor_,
 759                                                          Inset::REF_CODE);
 760                         if (inset) {
 761                                 label = inset->getParam("reference");
 762                                 // persistent=false: use temp_bookmark
 763                                 saveBookmark(0);
 764                         }
 765                 }
 766
 767                 if (!label.empty())
 768                         gotoLabel(label);
 769                 break;
 770         }
 771
 772         case LFUN_PARAGRAPH_GOTO: {
 773                 int const id = convert<int>(to_utf8(cmd.argument()));
 774                 int i = 0;
 775                 for (Buffer * b = buffer_; i == 0 || b != buffer_; b = theBufferList().next(b)) {
 776                         ParIterator par = b->getParFromID(id);
 777                         if (par == b->par_iterator_end()) {
 778                                 LYXERR(Debug::INFO)
 779                                         << "No matching paragraph found! ["
 780                                         << id << "]." << endl;
 781                         } else {
 782                                 LYXERR(Debug::INFO)
 783                                         << "Paragraph " << par->id()
 784                                         << " found in buffer `"
 785                                         << b->fileName() << "'." << endl;
 786
 787                                 if (b == buffer_) {
 788                                         // Set the cursor
 789                                         setCursor(makeDocIterator(par, 0));
 790                                 } else {
 791                                         // Switch to other buffer view and resend cmd
 792                                         theLyXFunc().dispatch(FuncRequest(
 793                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 794                                         theLyXFunc().dispatch(cmd);
 795                                         updateFlags = Update::None;
 796                                 }
 797                                 break;
 798                         }
 799                         ++i;
 800                 }
 801                 break;
 802         }
 803
 804         case LFUN_OUTLINE_UP:
 805                 toc::outline(toc::Up, cursor_);
 806                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 807                 updateLabels(*buffer_);
 808                 break;
 809         case LFUN_OUTLINE_DOWN:
 810                 toc::outline(toc::Down, cursor_);
 811                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 812                 updateLabels(*buffer_);
 813                 break;
 814         case LFUN_OUTLINE_IN:
 815                 toc::outline(toc::In, cursor_);
 816                 updateLabels(*buffer_);
 817                 break;
 818         case LFUN_OUTLINE_OUT:
 819                 toc::outline(toc::Out, cursor_);
 820                 updateLabels(*buffer_);
 821                 break;
 822
 823         case LFUN_NOTE_NEXT:
 824                 bv_funcs::gotoInset(this, Inset::NOTE_CODE, false);
 825                 break;
 826
 827         case LFUN_REFERENCE_NEXT: {
 828                 vector<Inset_code> tmp;
 829                 tmp.push_back(Inset::LABEL_CODE);
 830                 tmp.push_back(Inset::REF_CODE);
 831                 bv_funcs::gotoInset(this, tmp, true);
 832                 break;
 833         }
 834
 835         case LFUN_CHANGES_TRACK:
 836                 buffer_->params().trackChanges = !buffer_->params().trackChanges;
 837                 break;
 838
 839         case LFUN_CHANGES_OUTPUT:
 840                 buffer_->params().outputChanges = !buffer_->params().outputChanges;
 841                 if (buffer_->params().outputChanges) {
 842                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
 843                         bool xcolorsoul = LaTeXFeatures::isAvailable("soul") &&
 844                                           LaTeXFeatures::isAvailable("xcolor");
 845
 846                         if (!dvipost && !xcolorsoul) {
 847                                 Alert::warning(_("Changes not shown in LaTeX output"),
 848                                                _("Changes will not be highlighted in LaTeX output, "
 849                                                  "because neither dvipost nor xcolor/soul are installed.\n"
 850                                                  "Please install these packages or redefine "
 851                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
 852                         } else if (!xcolorsoul) {
 853                                 Alert::warning(_("Changes not shown in LaTeX output"),
 854                                                _("Changes will not be highlighted in LaTeX output "
 855                                                  "when using pdflatex, because xcolor and soul are not installed.\n"
 856                                                  "Please install both packages or redefine "
 857                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
 858                         }
 859                 }
 860                 break;
 861
 862         case LFUN_CHANGE_NEXT:
 863                 findNextChange(this);
 864                 break;
 865
 866         case LFUN_CHANGES_MERGE:
 867                 if (findNextChange(this))
 868                         showDialog("changes");
 869                 break;
 870
 871         case LFUN_ALL_CHANGES_ACCEPT:
 872                 // select complete document
 873                 cursor_.reset(buffer_->inset());
 874                 cursor_.selHandle(true);
 875                 buffer_->text().cursorBottom(cursor_);
 876                 // accept everything in a single step to support atomic undo
 877                 buffer_->text().acceptOrRejectChanges(cursor_, Text::ACCEPT);
 878                 break;
 879
 880         case LFUN_ALL_CHANGES_REJECT:
 881                 // select complete document
 882                 cursor_.reset(buffer_->inset());
 883                 cursor_.selHandle(true);
 884                 buffer_->text().cursorBottom(cursor_);
 885                 // reject everything in a single step to support atomic undo
 886                 // Note: reject does not work recursively; the user may have to repeat the operation
 887                 buffer_->text().acceptOrRejectChanges(cursor_, Text::REJECT);
 888                 break;
 889
 890         case LFUN_WORD_FIND:
 891                 find(this, cmd);
 892                 break;
 893
 894         case LFUN_WORD_REPLACE: {
 895                 bool has_deleted = false;
 896                 if (cur.selection()) {
 897                         DocIterator beg = cur.selectionBegin();
 898                         DocIterator end = cur.selectionEnd();
 899                         if (beg.pit() == end.pit()) {
 900                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
 901                                         if (cur.paragraph().isDeleted(p))
 902                                                 has_deleted = true;
 903                                 }
 904                         }
 905                 }
 906                 replace(this, cmd, has_deleted);
 907                 break;
 908         }
 909
 910         case LFUN_MARK_OFF:
 911                 cur.clearSelection();
 912                 cur.resetAnchor();
 913                 cur.message(from_utf8(N_("Mark off")));
 914                 break;
 915
 916         case LFUN_MARK_ON:
 917                 cur.clearSelection();
 918                 cur.mark() = true;
 919                 cur.resetAnchor();
 920                 cur.message(from_utf8(N_("Mark on")));
 921                 break;
 922
 923         case LFUN_MARK_TOGGLE:
 924                 cur.clearSelection();
 925                 if (cur.mark()) {
 926                         cur.mark() = false;
 927                         cur.message(from_utf8(N_("Mark removed")));
 928                 } else {
 929                         cur.mark() = true;
 930                         cur.message(from_utf8(N_("Mark set")));
 931                 }
 932                 cur.resetAnchor();
 933                 break;
 934
 935         case LFUN_SCREEN_RECENTER:
 936                 center();
 937                 break;
 938
 939         case LFUN_BIBTEX_DATABASE_ADD: {
 940                 Cursor tmpcur = cursor_;
 941                 bv_funcs::findInset(tmpcur, Inset::BIBTEX_CODE, false);
 942                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 943                                                 Inset::BIBTEX_CODE);
 944                 if (inset) {
 945                         if (inset->addDatabase(to_utf8(cmd.argument())))
 946                                 buffer_->updateBibfilesCache();
 947                 }
 948                 break;
 949         }
 950
 951         case LFUN_BIBTEX_DATABASE_DEL: {
 952                 Cursor tmpcur = cursor_;
 953                 bv_funcs::findInset(tmpcur, Inset::BIBTEX_CODE, false);
 954                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 955                                                 Inset::BIBTEX_CODE);
 956                 if (inset) {
 957                         if (inset->delDatabase(to_utf8(cmd.argument())))
 958                                 buffer_->updateBibfilesCache();
 959                 }
 960                 break;
 961         }
 962
 963         case LFUN_WORDS_COUNT: {
 964                 DocIterator from, to;
 965                 if (cur.selection()) {
 966                         from = cur.selectionBegin();
 967                         to = cur.selectionEnd();
 968                 } else {
 969                         from = doc_iterator_begin(buffer_->inset());
 970                         to = doc_iterator_end(buffer_->inset());
 971                 }
 972                 int const count = countWords(from, to);
 973                 docstring message;
 974                 if (count != 1) {
 975                         if (cur.selection())
 976                                 message = bformat(_("%1$d words in selection."),
 977                                           count);
 978                                 else
 979                                         message = bformat(_("%1$d words in document."),
 980                                                           count);
 981                 }
 982                 else {
 983                         if (cur.selection())
 984                                 message = _("One word in selection.");
 985                         else
 986                                 message = _("One word in document.");
 987                 }
 988
 989                 Alert::information(_("Count words"), message);
 990         }
 991                 break;
 992
 993         case LFUN_BUFFER_TOGGLE_COMPRESSION:
 994                 // turn compression on/off
 995                 buffer_->params().compressed = !buffer_->params().compressed;
 996                 break;
 997
 998         case LFUN_NEXT_INSET_TOGGLE: {
 999                 // this is the real function we want to invoke
1000                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
1001                 // if there is an inset at cursor, see whether it
1002                 // wants to toggle.
1003                 Inset * inset = cur.nextInset();
1004                 if (inset && inset->isActive()) {
1005                         Cursor tmpcur = cur;
1006                         tmpcur.pushLeft(*inset);
1007                         inset->dispatch(tmpcur, tmpcmd);
1008                         if (tmpcur.result().dispatched()) {
1009                                 cur.dispatched();
1010                         }
1011                 }
1012                 // if it did not work, try the underlying inset.
1013                 if (!cur.result().dispatched())
1014                         cur.dispatch(tmpcmd);
1015
1016                 if (cur.result().dispatched())
1017                         cur.clearSelection();
1018
1019                 break;
1020         }
1021
1022         default:
1023                 updateFlags = Update::None;
1024         }
1025
1026         return updateFlags;
1027 }
1028
1029
1030 docstring const BufferView::requestSelection()
1031 {
1032         if (!buffer_)
1033                 return docstring();
1034
1035         Cursor & cur = cursor_;
1036
1037         if (!cur.selection()) {
1038                 xsel_cache_.set = false;
1039                 return docstring();
1040         }
1041
1042         if (!xsel_cache_.set ||
1043             cur.top() != xsel_cache_.cursor ||
1044             cur.anchor_.top() != xsel_cache_.anchor)
1045         {
1046                 xsel_cache_.cursor = cur.top();
1047                 xsel_cache_.anchor = cur.anchor_.top();
1048                 xsel_cache_.set = cur.selection();
1049                 return cur.selectionAsString(false);
1050         }
1051         return docstring();
1052 }
1053
1054
1055 void BufferView::clearSelection()
1056 {
1057         if (buffer_) {
1058                 cursor_.clearSelection();
1059                 // Clear the selection buffer. Otherwise a subsequent
1060                 // middle-mouse-button paste would use the selection buffer,
1061                 // not the more current external selection.
1062                 cap::clearSelection();
1063                 xsel_cache_.set = false;
1064                 // The buffer did not really change, but this causes the
1065                 // redraw we need because we cleared the selection above.
1066                 buffer_->changed();
1067         }
1068 }
1069
1070
1071 void BufferView::workAreaResize(int width, int height)
1072 {
1073         // Update from work area
1074         width_ = width;
1075         height_ = height;
1076
1077         // The complete text metrics will be redone.
1078         text_metrics_.clear();
1079
1080         if (buffer_)
1081                 resize();
1082 }
1083
1084
1085 Inset const * BufferView::getCoveringInset(Text const & text, int x, int y)
1086 {
1087         pit_type pit = text.getPitNearY(*this, y);
1088         BOOST_ASSERT(pit != -1);
1089         Paragraph const & par = text.getPar(pit);
1090
1091         LYXERR(Debug::DEBUG)
1092                 << BOOST_CURRENT_FUNCTION
1093                 << ": x: " << x
1094                 << " y: " << y
1095                 << "  pit: " << pit
1096                 << endl;
1097         InsetList::const_iterator iit = par.insetlist.begin();
1098         InsetList::const_iterator iend = par.insetlist.end();
1099         for (; iit != iend; ++iit) {
1100                 Inset * const inset = iit->inset;
1101                 if (inset->covers(*this, x, y)) {
1102                         if (!inset->descendable())
1103                                 // No need to go further down if the inset is not
1104                                 // descendable.
1105                                 return inset;
1106
1107                         size_t cell_number = inset->nargs();
1108                         // Check all the inner cell.
1109                         for (size_t i = 0; i != cell_number; ++i) {
1110                                 Text const * inner_text = inset->getText(i);
1111                                 if (inner_text) {
1112                                         // Try deeper.
1113                                         Inset const * inset_deeper =
1114                                                 getCoveringInset(*inner_text, x, y);
1115                                         if (inset_deeper)
1116                                                 return inset_deeper;
1117                                 }
1118                         }
1119
1120                         LYXERR(Debug::DEBUG)
1121                                 << BOOST_CURRENT_FUNCTION
1122                                 << ": Hit inset: " << inset << endl;
1123                         return inset;
1124                 }
1125         }
1126         LYXERR(Debug::DEBUG)
1127                 << BOOST_CURRENT_FUNCTION
1128                 << ": No inset hit. " << endl;
1129         return 0;
1130 }
1131
1132
1133 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
1134 {
1135         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1136
1137         // This is only called for mouse related events including
1138         // LFUN_FILE_OPEN generated by drag-and-drop.
1139         FuncRequest cmd = cmd0;
1140
1141         // E.g. Qt mouse press when no buffer
1142         if (!buffer_)
1143                 return false;
1144
1145         Cursor cur(*this);
1146         cur.push(buffer_->inset());
1147         cur.selection() = cursor_.selection();
1148
1149         // Either the inset under the cursor or the
1150         // surrounding Text will handle this event.
1151
1152         // make sure we stay within the screen...
1153         cmd.y = min(max(cmd.y, -1), height_);
1154
1155         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1156
1157                 // Get inset under mouse, if there is one.
1158                 Inset const * covering_inset =
1159                         getCoveringInset(buffer_->text(), cmd.x, cmd.y);
1160                 if (covering_inset == last_inset_)
1161                         // Same inset, no need to do anything...
1162                         return false;
1163
1164                 bool need_redraw = false;
1165                 // const_cast because of setMouseHover().
1166                 Inset * inset = const_cast<Inset *>(covering_inset);
1167                 if (last_inset_)
1168                         // Remove the hint on the last hovered inset (if any).
1169                         need_redraw |= last_inset_->setMouseHover(false);
1170                 if (inset)
1171                         // Highlighted the newly hovered inset (if any).
1172                         need_redraw |= inset->setMouseHover(true);
1173                 last_inset_ = inset;
1174
1175                 // if last metrics update was in singlepar mode, WorkArea::redraw() will
1176                 // not expose the button for redraw. We adjust here the metrics dimension
1177                 // to enable a full redraw.
1178                 // FIXME: It is possible to redraw only the area around the button!
1179                 if (need_redraw
1180                         && metrics_info_.update_strategy == SingleParUpdate) {
1181                         // FIXME: It should be possible to redraw only the area around
1182                         // the button by doing this:
1183                         //
1184                         //metrics_info_.singlepar = false;
1185                         //metrics_info_.y1 = ymin of button;
1186                         //metrics_info_.y2 = ymax of button;
1187                         //
1188                         // Unfortunately, rowpainter.cpp:paintText() does not distinguish
1189                         // between background updates and text updates. So we use the hammer
1190                         // solution for now. We could also avoid the updateMetrics() below
1191                         // by using the first and last pit of the CoordCache. Have a look
1192                         // at Text::getPitNearY() to see what I mean.
1193                         //
1194                         //metrics_info_.pit1 = first pit of CoordCache;
1195                         //metrics_info_.pit2 = last pit of CoordCache;
1196                         //metrics_info_.singlepar = false;
1197                         //metrics_info_.y1 = 0;
1198                         //metrics_info_.y2 = height_;
1199                         //
1200                         updateMetrics(false);
1201                 }
1202
1203                 // This event (moving without mouse click) is not passed further.
1204                 // This should be changed if it is further utilized.
1205                 return need_redraw;
1206         }
1207
1208         // Build temporary cursor.
1209         Inset * inset = buffer_->text().editXY(cur, cmd.x, cmd.y);
1210
1211         // Put anchor at the same position.
1212         cur.resetAnchor();
1213
1214         // Try to dispatch to an non-editable inset near this position
1215         // via the temp cursor. If the inset wishes to change the real
1216         // cursor it has to do so explicitly by using
1217         //  cur.bv().cursor() = cur;  (or similar)
1218         if (inset) {
1219                 inset->dispatch(cur, cmd);
1220         }
1221
1222         // Now dispatch to the temporary cursor. If the real cursor should
1223         // be modified, the inset's dispatch has to do so explicitly.
1224         if (!cur.result().dispatched())
1225                 cur.dispatch(cmd);
1226
1227         // Redraw if requested and necessary.
1228         if (cur.result().dispatched() && cur.result().update())
1229                 return update(cur.result().update());
1230
1231         return false;
1232 }
1233
1234
1235 void BufferView::scroll(int /*lines*/)
1236 {
1237 //      if (!buffer_)
1238 //              return;
1239 //
1240 //      Text const * t = &buffer_->text();
1241 //      int const line_height = defaultRowHeight();
1242 //
1243 //      // The new absolute coordinate
1244 //      int new_top_y = top_y() + lines * line_height;
1245 //
1246 //      // Restrict to a valid value
1247 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
1248 //      new_top_y = std::max(0, new_top_y);
1249 //
1250 //      scrollDocView(new_top_y);
1251 //
1252 }
1253
1254
1255 void BufferView::setCursorFromRow(int row)
1256 {
1257         int tmpid = -1;
1258         int tmppos = -1;
1259
1260         buffer_->texrow().getIdFromRow(row, tmpid, tmppos);
1261
1262         cursor_.reset(buffer_->inset());
1263         if (tmpid == -1)
1264                 buffer_->text().setCursor(cursor_, 0, 0);
1265         else
1266                 buffer_->text().setCursor(cursor_, buffer_->getParFromID(tmpid).pit(), tmppos);
1267 }
1268
1269
1270 void BufferView::gotoLabel(docstring const & label)
1271 {
1272         for (InsetIterator it = inset_iterator_begin(buffer_->inset()); it; ++it) {
1273                 vector<docstring> labels;
1274                 it->getLabelList(*buffer_, labels);
1275                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1276                         setCursor(it);
1277                         update();
1278                         return;
1279                 }
1280         }
1281 }
1282
1283
1284 TextMetrics const & BufferView::textMetrics(Text const * t) const
1285 {
1286         return const_cast<BufferView *>(this)->textMetrics(t);
1287 }
1288
1289
1290 TextMetrics & BufferView::textMetrics(Text const * t)
1291 {
1292         TextMetricsCache::iterator tmc_it  = text_metrics_.find(t);
1293         if (tmc_it == text_metrics_.end()) {
1294                 tmc_it = text_metrics_.insert(
1295                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
1296         }
1297         return tmc_it->second;
1298 }
1299
1300
1301 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
1302                 pit_type pit) const
1303 {
1304         return textMetrics(t).parMetrics(pit);
1305 }
1306
1307
1308 int BufferView::workHeight() const
1309 {
1310         return height_;
1311 }
1312
1313
1314 void BufferView::setCursor(DocIterator const & dit)
1315 {
1316         size_t const n = dit.depth();
1317         for (size_t i = 0; i < n; ++i)
1318                 dit[i].inset().edit(cursor_, true);
1319
1320         cursor_.setCursor(dit);
1321         cursor_.selection() = false;
1322 }
1323
1324
1325 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
1326 {
1327         // Would be wrong to delete anything if we have a selection.
1328         if (cur.selection())
1329                 return false;
1330
1331         bool need_anchor_change = false;
1332         bool changed = cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1333                 need_anchor_change);
1334
1335         if (need_anchor_change)
1336                 cur.resetAnchor();
1337
1338         if (!changed)
1339                 return false;
1340
1341         updateLabels(*buffer_);
1342
1343         updateMetrics(false);
1344         buffer_->changed();
1345         return true;
1346 }
1347
1348
1349 bool BufferView::mouseSetCursor(Cursor & cur)
1350 {
1351         BOOST_ASSERT(&cur.bv() == this);
1352
1353         // this event will clear selection so we save selection for
1354         // persistent selection
1355         cap::saveSelection(cursor());
1356
1357         // Has the cursor just left the inset?
1358         bool badcursor = false;
1359         bool leftinset = (&cursor_.inset() != &cur.inset());
1360         if (leftinset)
1361                 badcursor = notifyCursorLeaves(cursor_, cur);
1362
1363         // do the dEPM magic if needed
1364         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
1365         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
1366         // the leftinset bool would not be necessary (badcursor instead).
1367         bool update = leftinset;
1368         if (!badcursor && cursor_.inTexted())
1369                 update |= checkDepm(cur, cursor_);
1370
1371         // if the cursor was in an empty script inset and the new
1372         // position is in the nucleus of the inset, notifyCursorLeaves
1373         // will kill the script inset itself. So we check all the
1374         // elements of the cursor to make sure that they are correct.
1375         // For an example, see bug 2933:
1376         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1377         // The code below could maybe be moved to a DocIterator method.
1378         //lyxerr << "cur before " << cur <<std::endl;
1379         DocIterator dit(cur.inset());
1380         dit.push_back(cur.bottom());
1381         size_t i = 1;
1382         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1383                 dit.push_back(cur[i]);
1384                 ++i;
1385         }
1386         //lyxerr << "5 cur after" << dit <<std::endl;
1387
1388         cursor_.setCursor(dit);
1389         cursor_.boundary(cur.boundary());
1390         cursor_.clearSelection();
1391         finishUndo();
1392         return update;
1393 }
1394
1395
1396 void BufferView::putSelectionAt(DocIterator const & cur,
1397                                 int length, bool backwards)
1398 {
1399         cursor_.clearSelection();
1400
1401         setCursor(cur);
1402
1403         if (length) {
1404                 if (backwards) {
1405                         cursor_.pos() += length;
1406                         cursor_.setSelection(cursor_, -length);
1407                 } else
1408                         cursor_.setSelection(cursor_, length);
1409         }
1410 }
1411
1412
1413 Cursor & BufferView::cursor()
1414 {
1415         return cursor_;
1416 }
1417
1418
1419 Cursor const & BufferView::cursor() const
1420 {
1421         return cursor_;
1422 }
1423
1424
1425 pit_type BufferView::anchor_ref() const
1426 {
1427         return anchor_ref_;
1428 }
1429
1430
1431 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1432 {
1433         return metrics_info_;
1434 }
1435
1436
1437 // FIXME: We should split-up updateMetrics() for the singlepar case.
1438 void BufferView::updateMetrics(bool singlepar)
1439 {
1440         Text & buftext = buffer_->text();
1441         TextMetrics & tm = textMetrics(&buftext);
1442         pit_type size = int(buftext.paragraphs().size());
1443
1444         if (anchor_ref_ > int(buftext.paragraphs().size() - 1)) {
1445                 anchor_ref_ = int(buftext.paragraphs().size() - 1);
1446                 offset_ref_ = 0;
1447         }
1448
1449         if (!singlepar) {
1450                 // Clear out the position cache in case of full screen redraw,
1451                 coord_cache_.clear();
1452
1453                 // Clear out paragraph metrics to avoid having invalid metrics
1454                 // in the cache from paragraphs not relayouted below
1455                 tm.clear();
1456         }
1457
1458         // If the paragraph metrics has changed, we can not
1459         // use the singlepar optimisation.
1460         if (singlepar
1461                 // In Single Paragraph mode, rebreak only
1462                 // the (main text, not inset!) paragraph containing the cursor.
1463                 // (if this paragraph contains insets etc., rebreaking will
1464                 // recursively descend)
1465                 && tm.redoParagraph(cursor_.bottom().pit()))
1466                 singlepar = false;
1467
1468         pit_type const pit = anchor_ref_;
1469         int pit1 = pit;
1470         int pit2 = pit;
1471         size_t const npit = buftext.paragraphs().size();
1472
1473         // Rebreak anchor paragraph.
1474         if (!singlepar)
1475                 tm.redoParagraph(pit);
1476
1477         int y0 = tm.parMetrics(pit).ascent() - offset_ref_;
1478
1479         // Redo paragraphs above anchor if necessary.
1480         int y1 = y0;
1481         while (y1 > 0 && pit1 > 0) {
1482                 y1 -= tm.parMetrics(pit1).ascent();
1483                 --pit1;
1484                 if (!singlepar)
1485                         tm.redoParagraph(pit1);
1486                 y1 -= tm.parMetrics(pit1).descent();
1487         }
1488
1489
1490         // Take care of ascent of first line
1491         y1 -= tm.parMetrics(pit1).ascent();
1492
1493         // Normalize anchor for next time
1494         anchor_ref_ = pit1;
1495         offset_ref_ = -y1;
1496
1497         // Grey at the beginning is ugly
1498         if (pit1 == 0 && y1 > 0) {
1499                 y0 -= y1;
1500                 y1 = 0;
1501                 anchor_ref_ = 0;
1502         }
1503
1504         // Redo paragraphs below the anchor if necessary.
1505         int y2 = y0;
1506         while (y2 < height_ && pit2 < int(npit) - 1) {
1507                 y2 += tm.parMetrics(pit2).descent();
1508                 ++pit2;
1509                 if (!singlepar)
1510                         tm.redoParagraph(pit2);
1511                 y2 += tm.parMetrics(pit2).ascent();
1512         }
1513
1514         // Take care of descent of last line
1515         y2 += tm.parMetrics(pit2).descent();
1516
1517         // The coordinates of all these paragraphs are correct, cache them
1518         int y = y1;
1519         CoordCache::InnerParPosCache & parPos = coord_cache_.parPos()[&buftext];
1520         for (pit_type pit = pit1; pit <= pit2; ++pit) {
1521                 ParagraphMetrics const & pm = tm.parMetrics(pit);
1522                 y += pm.ascent();
1523                 parPos[pit] = Point(0, y);
1524                 if (singlepar && pit == cursor_.bottom().pit()) {
1525                         // In Single Paragraph mode, collect here the
1526                         // y1 and y2 of the (one) paragraph the cursor is in
1527                         y1 = y - pm.ascent();
1528                         y2 = y + pm.descent();
1529                 }
1530                 y += pm.descent();
1531         }
1532
1533         if (singlepar) {
1534                 // collect cursor paragraph iter bounds
1535                 pit1 = cursor_.bottom().pit();
1536                 pit2 = cursor_.bottom().pit();
1537         }
1538
1539         LYXERR(Debug::DEBUG)
1540                 << BOOST_CURRENT_FUNCTION
1541                 << " y1: " << y1
1542                 << " y2: " << y2
1543                 << " pit1: " << pit1
1544                 << " pit2: " << pit2
1545                 << " npit: " << npit
1546                 << " singlepar: " << singlepar
1547                 << "size: " << size
1548                 << endl;
1549
1550         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2,
1551                 singlepar? SingleParUpdate: FullScreenUpdate, size);
1552
1553         if (lyxerr.debugging(Debug::WORKAREA)) {
1554                 LYXERR(Debug::WORKAREA) << "BufferView::updateMetrics" << endl;
1555                 coord_cache_.dump();
1556         }
1557 }
1558
1559
1560 void BufferView::menuInsertLyXFile(string const & filenm)
1561 {
1562         BOOST_ASSERT(cursor_.inTexted());
1563         string filename = filenm;
1564
1565         if (filename.empty()) {
1566                 // Launch a file browser
1567                 // FIXME UNICODE
1568                 string initpath = lyxrc.document_path;
1569
1570                 if (buffer_) {
1571                         string const trypath = buffer_->filePath();
1572                         // If directory is writeable, use this as default.
1573                         if (isDirWriteable(FileName(trypath)))
1574                                 initpath = trypath;
1575                 }
1576
1577                 // FIXME UNICODE
1578                 FileDialog fileDlg(_("Select LyX document to insert"),
1579                         LFUN_FILE_INSERT,
1580                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1581                         make_pair(_("Examples|#E#e"),
1582                                     from_utf8(addPath(package().system_support().absFilename(),
1583                                     "examples"))));
1584
1585                 FileDialog::Result result =
1586                         fileDlg.open(from_utf8(initpath),
1587                                      FileFilterList(_("LyX Documents (*.lyx)")),
1588                                      docstring());
1589
1590                 if (result.first == FileDialog::Later)
1591                         return;
1592
1593                 // FIXME UNICODE
1594                 filename = to_utf8(result.second);
1595
1596                 // check selected filename
1597                 if (filename.empty()) {
1598                         // emit message signal.
1599                         message(_("Canceled."));
1600                         return;
1601                 }
1602         }
1603
1604         // Get absolute path of file and add ".lyx"
1605         // to the filename if necessary
1606         filename = fileSearch(string(), filename, "lyx").absFilename();
1607
1608         docstring const disp_fn = makeDisplayPath(filename);
1609         // emit message signal.
1610         message(bformat(_("Inserting document %1$s..."), disp_fn));
1611
1612         docstring res;
1613         Buffer buf("", false);
1614         if (lyx::loadLyXFile(&buf, FileName(filename))) {
1615                 ErrorList & el = buffer_->errorList("Parse");
1616                 // Copy the inserted document error list into the current buffer one.
1617                 el = buf.errorList("Parse");
1618                 recordUndo(cursor_);
1619                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1620                                              buf.params().textclass, el);
1621                 res = _("Document %1$s inserted.");
1622         } else
1623                 res = _("Could not insert document %1$s");
1624
1625         // emit message signal.
1626         message(bformat(res, disp_fn));
1627         buffer_->errors("Parse");
1628         resize();
1629 }
1630
1631 } // namespace lyx