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 "coordcache.h"
  24 #include "CutAndPaste.h"
  25 #include "debug.h"
  26 #include "dispatchresult.h"
  27 #include "errorlist.h"
  28 #include "factory.h"
  29 #include "FloatList.h"
  30 #include "funcrequest.h"
  31 #include "FuncStatus.h"
  32 #include "gettext.h"
  33 #include "intl.h"
  34 #include "insetiterator.h"
  35 #include "language.h"
  36 #include "LaTeXFeatures.h"
  37 #include "lyx_cb.h" // added for Dispatch functions
  38 #include "lyx_main.h"
  39 #include "lyxfind.h"
  40 #include "lyxfunc.h"
  41 #include "lyxlayout.h"
  42 #include "lyxtext.h"
  43 #include "lyxtextclass.h"
  44 #include "lyxrc.h"
  45 #include "session.h"
  46 #include "paragraph.h"
  47 #include "paragraph_funcs.h"
  48 #include "ParagraphParameters.h"
  49 #include "pariterator.h"
  50 #include "texrow.h"
  51 #include "toc.h"
  52 #include "undo.h"
  53 #include "vspace.h"
  54 #include "WordLangTuple.h"
  55 #include "metricsinfo.h"
  56
  57 #include "insets/insetbibtex.h"
  58 #include "insets/insetcommand.h" // ChangeRefs
  59 #include "insets/insetref.h"
  60 #include "insets/insettext.h"
  61
  62 #include "frontends/Alert.h"
  63 #include "frontends/FileDialog.h"
  64 #include "frontends/FontMetrics.h"
  65
  66 #include "graphics/Previews.h"
  67
  68 #include "support/convert.h"
  69 #include "support/filefilterlist.h"
  70 #include "support/filetools.h"
  71 #include "support/package.h"
  72 #include "support/types.h"
  73
  74 #include <boost/bind.hpp>
  75 #include <boost/current_function.hpp>
  76
  77 #include <functional>
  78 #include <vector>
  79
  80
  81 namespace lyx {
  82
  83 using support::addPath;
  84 using support::bformat;
  85 using support::FileFilterList;
  86 using support::fileSearch;
  87 using support::isDirWriteable;
  88 using support::makeDisplayPath;
  89 using support::makeAbsPath;
  90 using support::package;
  91
  92 using std::distance;
  93 using std::endl;
  94 using std::istringstream;
  95 using std::make_pair;
  96 using std::min;
  97 using std::max;
  98 using std::mem_fun_ref;
  99 using std::string;
 100 using std::vector;
 101
 102 namespace Alert = frontend::Alert;
 103
 104 namespace {
 105
 106 /// Return an inset of this class if it exists at the current cursor position
 107 template <class T>
 108 T * getInsetByCode(LCursor & cur, InsetBase::Code code)
 109 {
 110         T * inset = 0;
 111         DocIterator it = cur;
 112         if (it.nextInset() &&
 113             it.nextInset()->lyxCode() == code) {
 114                 inset = static_cast<T*>(it.nextInset());
 115         }
 116         return inset;
 117 }
 118
 119 } // anon namespace
 120
 121
 122 BufferView::BufferView()
 123         : width_(0), height_(0), buffer_(0), wh_(0),
 124           cursor_(*this),
 125           multiparsel_cache_(false), anchor_ref_(0), offset_ref_(0),
 126           intl_(new Intl)
 127 {
 128         xsel_cache_.set = false;
 129         intl_->initKeyMapper(lyxrc.use_kbmap);
 130 }
 131
 132
 133 BufferView::~BufferView()
 134 {
 135 }
 136
 137
 138 Buffer * BufferView::buffer() const
 139 {
 140         return buffer_;
 141 }
 142
 143
 144 void BufferView::setBuffer(Buffer * b)
 145 {
 146         lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 147                             << "[ b = " << b << "]" << endl;
 148
 149         if (buffer_) {
 150                 // Save the actual cursor position and anchor inside the
 151                 // buffer so that it can be restored in case we rechange
 152                 // to this buffer later on.
 153                 buffer_->saveCursor(cursor_.selectionBegin(),
 154                                     cursor_.selectionEnd());
 155                 // current buffer is going to be switched-off, save cursor pos
 156                 LyX::ref().session().lastFilePos().save(buffer_->fileName(),
 157                         boost::tie(cursor_.pit(), cursor_.pos()) );
 158         }
 159
 160         // If we're quitting lyx, don't bother updating stuff
 161         if (quitting) {
 162                 buffer_ = 0;
 163                 return;
 164         }
 165
 166         // If we are closing current buffer, switch to the first in
 167         // buffer list.
 168         if (!b) {
 169                 lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 170                                     << " No Buffer!" << endl;
 171                 // We are closing the buffer, use the first buffer as current
 172                 buffer_ = theBufferList().first();
 173         } else {
 174                 // Set current buffer
 175                 buffer_ = b;
 176         }
 177
 178         // Reset old cursor
 179         cursor_ = LCursor(*this);
 180         anchor_ref_ = 0;
 181         offset_ref_ = 0;
 182
 183         if (buffer_) {
 184                 lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 185                                     << "Buffer addr: " << buffer_ << endl;
 186                 cursor_.push(buffer_->inset());
 187                 cursor_.resetAnchor();
 188                 buffer_->text().init(this);
 189                 buffer_->text().setCurrentFont(cursor_);
 190                 if (buffer_->getCursor().size() > 0 &&
 191                     buffer_->getAnchor().size() > 0)
 192                 {
 193                         cursor_.setCursor(buffer_->getAnchor().asDocIterator(&(buffer_->inset())));
 194                         cursor_.resetAnchor();
 195                         cursor_.setCursor(buffer_->getCursor().asDocIterator(&(buffer_->inset())));
 196                         cursor_.setSelection();
 197                 }
 198         }
 199
 200         if (buffer_)
 201                 updateMetrics(false);
 202
 203         if (buffer_ && graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 204                 graphics::Previews::get().generateBufferPreviews(*buffer_);
 205 }
 206
 207
 208 bool BufferView::loadLyXFile(string const & filename, bool tolastfiles)
 209 {
 210         // Get absolute path of file and add ".lyx"
 211         // to the filename if necessary
 212         string s = fileSearch(string(), filename, "lyx");
 213
 214         bool const found = !s.empty();
 215
 216         if (!found)
 217                 s = filename;
 218
 219         // File already open?
 220         if (theBufferList().exists(s)) {
 221                 docstring const file = makeDisplayPath(s, 20);
 222                 docstring text = bformat(_("The document %1$s is already "
 223                                                      "loaded.\n\nDo you want to revert "
 224                                                      "to the saved version?"), file);
 225                 int const ret = Alert::prompt(_("Revert to saved document?"),
 226                         text, 0, 1,  _("&Revert"), _("&Switch to document"));
 227
 228                 if (ret != 0) {
 229                         setBuffer(theBufferList().getBuffer(s));
 230                         return true;
 231                 }
 232                 // FIXME: should be LFUN_REVERT
 233                 if (!theBufferList().close(theBufferList().getBuffer(s), false))
 234                         return false;
 235                 // Fall through to new load. (Asger)
 236                 buffer_ = 0;
 237         }
 238
 239         Buffer * b = 0;
 240
 241         if (found) {
 242                 b = theBufferList().newBuffer(s);
 243                 if (!lyx::loadLyXFile(b, s)) {
 244                         theBufferList().release(b);
 245                         return false;
 246                 }
 247         } else {
 248                 docstring text = bformat(_("The document %1$s does not yet "
 249                                                      "exist.\n\nDo you want to create "
 250                                                      "a new document?"), from_utf8(s));
 251                 int const ret = Alert::prompt(_("Create new document?"),
 252                          text, 0, 1, _("&Create"), _("Cancel"));
 253
 254                 if (ret == 0) {
 255                         b = newFile(s, string(), true);
 256                         if (!b)
 257                                 return false;
 258                 } else
 259                         return false;
 260         }
 261
 262         setBuffer(b);
 263         // Send the "errors" signal in case of parsing errors
 264         b->errors("Parse");
 265
 266         // scroll to the position when the file was last closed
 267         if (lyxrc.use_lastfilepos) {
 268                 pit_type pit;
 269                 pos_type pos;
 270                 boost::tie(pit, pos) = LyX::ref().session().lastFilePos().load(s);
 271                 // I am not sure how to separate the following part to a function
 272                 // so I will leave this to Lars.
 273                 //
 274                 // check pit since the document may be externally changed.
 275                 if ( static_cast<size_t>(pit) < b->paragraphs().size() ) {
 276                         ParIterator it = b->par_iterator_begin();
 277                         ParIterator const end = b->par_iterator_end();
 278                         for (; it != end; ++it)
 279                                 if (it.pit() == pit) {
 280                                         // restored pos may be bigger than it->size
 281                                         setCursor(makeDocIterator(it, min(pos, it->size())));
 282                                         // No need to update the metrics if fitCursor returns false.
 283                                         if (fitCursor())
 284                                                 updateMetrics(false);
 285                                         break;
 286                                 }
 287                 }
 288         }
 289
 290         if (tolastfiles)
 291                 LyX::ref().session().lastFiles().add(b->fileName());
 292
 293         return true;
 294 }
 295
 296
 297 void BufferView::reload()
 298 {
 299         string const fn = buffer_->fileName();
 300         if (theBufferList().close(buffer_, false))
 301                 loadLyXFile(fn);
 302 }
 303
 304
 305 void BufferView::resize()
 306 {
 307         if (!buffer_)
 308                 return;
 309
 310         lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION << endl;
 311
 312         buffer_->text().init(this);
 313         update();
 314         switchKeyMap();
 315 }
 316
 317
 318 bool BufferView::fitCursor()
 319 {
 320         if (bv_funcs::status(this, cursor_) == bv_funcs::CUR_INSIDE) {
 321                 frontend::FontMetrics const & fm =
 322                         theFontMetrics(cursor_.getFont());
 323                 int const asc = fm.maxAscent();
 324                 int const des = fm.maxDescent();
 325                 Point const p = bv_funcs::getPos(*this, cursor_, cursor_.boundary());
 326                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 327                         return false;
 328         }
 329         center();
 330         return true;
 331 }
 332
 333
 334 bool BufferView::multiParSel()
 335 {
 336         if (!cursor_.selection())
 337                 return false;
 338         bool ret = multiparsel_cache_;
 339         multiparsel_cache_ = cursor_.selBegin().pit() != cursor_.selEnd().pit();
 340         // Either this, or previous selection spans paragraphs
 341         return ret || multiparsel_cache_;
 342 }
 343
 344
 345 std::pair<bool, bool> BufferView::update(Update::flags flags)
 346 {
 347         // This is close to a hot-path.
 348         if (lyxerr.debugging(Debug::DEBUG)) {
 349                 lyxerr[Debug::DEBUG]
 350                         << BOOST_CURRENT_FUNCTION
 351                         << "[fitcursor = " << (flags & Update::FitCursor)
 352                         << ", forceupdate = " << (flags & Update::Force)
 353                         << ", singlepar = " << (flags & Update::SinglePar)
 354                         << "]  buffer: " << buffer_ << endl;
 355         }
 356
 357         // Check needed to survive LyX startup
 358         if (!buffer_)
 359                 return make_pair(false, false);
 360
 361         if (lyxerr.debugging(Debug::WORKAREA)) {
 362                 lyxerr[Debug::WORKAREA] << "BufferView::update" << std::endl;
 363         }
 364
 365         // Update macro store
 366         buffer_->buildMacros();
 367
 368         // Now do the first drawing step if needed. This consists on updating
 369         // the CoordCache in updateMetrics().
 370         // The second drawing step is done in WorkArea::redraw() if needed.
 371
 372         // Case when no explicit update is requested.
 373         if (!flags) {
 374                 // no need to do anything.
 375                 return make_pair(false, false);
 376         }
 377
 378         bool full_metrics = flags & Update::Force;
 379         if (flags & Update::MultiParSel)
 380                 full_metrics |= multiParSel();
 381
 382         bool const single_par = !full_metrics;
 383         updateMetrics(single_par);
 384
 385         if (flags & Update::FitCursor && fitCursor())
 386                 updateMetrics(false);
 387
 388         // tell the frontend to update the screen.
 389         return make_pair(true, single_par);
 390 }
 391
 392
 393 void BufferView::updateScrollbar()
 394 {
 395         if (!buffer_) {
 396                 lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION
 397                                      << " no text in updateScrollbar" << endl;
 398                 scrollbarParameters_.reset();
 399                 return;
 400         }
 401
 402         LyXText & t = buffer_->text();
 403         int const parsize = int(t.paragraphs().size() - 1);
 404         if (anchor_ref_ >  parsize)  {
 405                 anchor_ref_ = parsize;
 406                 offset_ref_ = 0;
 407         }
 408
 409         if (lyxerr.debugging(Debug::GUI)) {
 410                 lyxerr[Debug::GUI]
 411                         << BOOST_CURRENT_FUNCTION
 412                         << " Updating scrollbar: height: " << t.paragraphs().size()
 413                         << " curr par: " << cursor_.bottom().pit()
 414                         << " default height " << defaultRowHeight() << endl;
 415         }
 416
 417         // It would be better to fix the scrollbar to understand
 418         // values in [0..1] and divide everything by wh
 419
 420         // estimated average paragraph height:
 421         if (wh_ == 0)
 422                 wh_ = height_ / 4;
 423         int h = t.getPar(anchor_ref_).height();
 424
 425         // Normalize anchor/offset (MV):
 426         while (offset_ref_ > h && anchor_ref_ < parsize) {
 427                 anchor_ref_++;
 428                 offset_ref_ -= h;
 429                 h = t.getPar(anchor_ref_).height();
 430         }
 431         // Look at paragraph heights on-screen
 432         int sumh = 0;
 433         int nh = 0;
 434         for (pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 435                 if (sumh > height_)
 436                         break;
 437                 int const h2 = t.getPar(pit).height();
 438                 sumh += h2;
 439                 nh++;
 440         }
 441
 442         BOOST_ASSERT(nh);
 443         int const hav = sumh / nh;
 444         // More realistic average paragraph height
 445         if (hav > wh_)
 446                 wh_ = hav;
 447
 448         BOOST_ASSERT(h);
 449         scrollbarParameters_.height = (parsize + 1) * wh_;
 450         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 451         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 452 }
 453
 454
 455 ScrollbarParameters const & BufferView::scrollbarParameters() const
 456 {
 457         return scrollbarParameters_;
 458 }
 459
 460
 461 void BufferView::scrollDocView(int value)
 462 {
 463         lyxerr[Debug::GUI] << BOOST_CURRENT_FUNCTION
 464                            << "[ value = " << value << "]" << endl;
 465
 466         if (!buffer_)
 467                 return;
 468
 469         LyXText & t = buffer_->text();
 470
 471         float const bar = value / float(wh_ * t.paragraphs().size());
 472
 473         anchor_ref_ = int(bar * t.paragraphs().size());
 474         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 475                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 476         t.redoParagraph(*this, anchor_ref_);
 477         int const h = t.getPar(anchor_ref_).height();
 478         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 479         updateMetrics(false);
 480 }
 481
 482
 483 void BufferView::setCursorFromScrollbar()
 484 {
 485         LyXText & t = buffer_->text();
 486
 487         int const height = 2 * defaultRowHeight();
 488         int const first = height;
 489         int const last = height_ - height;
 490         LCursor & cur = cursor_;
 491
 492         bv_funcs::CurStatus st = bv_funcs::status(this, cur);
 493
 494         switch (st) {
 495         case bv_funcs::CUR_ABOVE:
 496                 t.setCursorFromCoordinates(cur, 0, first);
 497                 cur.clearSelection();
 498                 break;
 499         case bv_funcs::CUR_BELOW:
 500                 t.setCursorFromCoordinates(cur, 0, last);
 501                 cur.clearSelection();
 502                 break;
 503         case bv_funcs::CUR_INSIDE:
 504                 int const y = bv_funcs::getPos(*this, cur, cur.boundary()).y_;
 505                 int const newy = min(last, max(y, first));
 506                 if (y != newy) {
 507                         cur.reset(buffer_->inset());
 508                         t.setCursorFromCoordinates(cur, 0, newy);
 509                 }
 510         }
 511 }
 512
 513
 514 Change const BufferView::getCurrentChange() const
 515 {
 516         if (!cursor_.selection())
 517                 return Change(Change::UNCHANGED);
 518
 519         DocIterator dit = cursor_.selectionBegin();
 520         return dit.paragraph().lookupChange(dit.pos());
 521 }
 522
 523
 524 void BufferView::saveBookmark(bool persistent)
 525 {
 526         LyX::ref().session().bookmarks().save(
 527                 buffer_->fileName(),
 528                 cursor_.paragraph().id(),
 529                 cursor_.pos(),
 530                 persistent
 531         );
 532         if (persistent)
 533                 // emit message signal.
 534                 message(_("Save bookmark"));
 535 }
 536
 537
 538 void BufferView::moveToPosition(int par_id, pos_type par_pos)
 539 {
 540         cursor_.clearSelection();
 541
 542         ParIterator par = buffer_->getParFromID(par_id);
 543         if (par == buffer_->par_iterator_end())
 544                 return;
 545
 546         setCursor(makeDocIterator(par, min(par->size(), par_pos)));
 547 }
 548
 549
 550 void BufferView::switchKeyMap()
 551 {
 552         if (!lyxrc.rtl_support)
 553                 return;
 554
 555         if (getLyXText()->real_current_font.isRightToLeft()) {
 556                 if (intl_->keymap == Intl::PRIMARY)
 557                         intl_->keyMapSec();
 558         } else {
 559                 if (intl_->keymap == Intl::SECONDARY)
 560                         intl_->keyMapPrim();
 561         }
 562 }
 563
 564
 565 int BufferView::workWidth() const
 566 {
 567         return width_;
 568 }
 569
 570
 571 void BufferView::center()
 572 {
 573         CursorSlice & bot = cursor_.bottom();
 574         pit_type const pit = bot.pit();
 575         bot.text()->redoParagraph(*this, pit);
 576         Paragraph const & par = bot.text()->paragraphs()[pit];
 577         anchor_ref_ = pit;
 578         offset_ref_ = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary()).y_
 579                 + par.ascent() - height_ / 2;
 580 }
 581
 582
 583 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 584 {
 585         FuncStatus flag;
 586
 587         switch (cmd.action) {
 588
 589         case LFUN_UNDO:
 590                 flag.enabled(!buffer_->undostack().empty());
 591                 break;
 592         case LFUN_REDO:
 593                 flag.enabled(!buffer_->redostack().empty());
 594                 break;
 595         case LFUN_FILE_INSERT:
 596         case LFUN_FILE_INSERT_ASCII_PARA:
 597         case LFUN_FILE_INSERT_ASCII:
 598         case LFUN_BOOKMARK_SAVE:
 599                 // FIXME: Actually, these LFUNS should be moved to LyXText
 600                 flag.enabled(cursor_.inTexted());
 601                 break;
 602         case LFUN_FONT_STATE:
 603         case LFUN_LABEL_INSERT:
 604         case LFUN_PARAGRAPH_GOTO:
 605         // FIXME handle non-trivially
 606         case LFUN_OUTLINE_UP:
 607         case LFUN_OUTLINE_DOWN:
 608         case LFUN_OUTLINE_IN:
 609         case LFUN_OUTLINE_OUT:
 610         case LFUN_NOTE_NEXT:
 611         case LFUN_REFERENCE_NEXT:
 612         case LFUN_WORD_FIND:
 613         case LFUN_WORD_REPLACE:
 614         case LFUN_MARK_OFF:
 615         case LFUN_MARK_ON:
 616         case LFUN_MARK_TOGGLE:
 617         case LFUN_SCREEN_RECENTER:
 618         case LFUN_BIBTEX_DATABASE_ADD:
 619         case LFUN_BIBTEX_DATABASE_DEL:
 620         case LFUN_WORDS_COUNT:
 621         case LFUN_NEXT_INSET_TOGGLE:
 622                 flag.enabled(true);
 623                 break;
 624
 625         case LFUN_LABEL_GOTO: {
 626                 flag.enabled(!cmd.argument().empty()
 627                     || getInsetByCode<InsetRef>(cursor_, InsetBase::REF_CODE));
 628                 break;
 629         }
 630
 631         case LFUN_CHANGES_TRACK:
 632                 flag.enabled(true);
 633                 flag.setOnOff(buffer_->params().trackChanges);
 634                 break;
 635
 636         case LFUN_CHANGES_OUTPUT: {
 637                 OutputParams runparams;
 638                 LaTeXFeatures features(*buffer_, buffer_->params(), runparams);
 639                 flag.enabled(buffer_ && features.isAvailable("dvipost"));
 640                 flag.setOnOff(buffer_->params().outputChanges);
 641                 break;
 642         }
 643
 644         case LFUN_CHANGES_MERGE:
 645         case LFUN_CHANGE_NEXT:
 646         case LFUN_ALL_CHANGES_ACCEPT:
 647         case LFUN_ALL_CHANGES_REJECT:
 648                 flag.enabled(buffer_); // FIXME: Change tracking (MG)
 649                 break;
 650
 651         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 652                 flag.setOnOff(buffer_->params().compressed);
 653                 break;
 654         }
 655
 656         default:
 657                 flag.enabled(false);
 658         }
 659
 660         return flag;
 661 }
 662
 663
 664 bool BufferView::dispatch(FuncRequest const & cmd)
 665 {
 666         //lyxerr << BOOST_CURRENT_FUNCTION
 667         //       << [ cmd = " << cmd << "]" << endl;
 668
 669         // Make sure that the cached BufferView is correct.
 670         lyxerr[Debug::ACTION] << BOOST_CURRENT_FUNCTION
 671                 << " action[" << cmd.action << ']'
 672                 << " arg[" << to_utf8(cmd.argument()) << ']'
 673                 << " x[" << cmd.x << ']'
 674                 << " y[" << cmd.y << ']'
 675                 << " button[" << cmd.button() << ']'
 676                 << endl;
 677
 678         LCursor & cur = cursor_;
 679
 680         switch (cmd.action) {
 681
 682         case LFUN_UNDO:
 683                 if (buffer_) {
 684                         cur.message(_("Undo"));
 685                         cur.clearSelection();
 686                         if (!textUndo(*this))
 687                                 cur.message(_("No further undo information"));
 688                         update();
 689                         switchKeyMap();
 690                 }
 691                 break;
 692
 693         case LFUN_REDO:
 694                 if (buffer_) {
 695                         cur.message(_("Redo"));
 696                         cur.clearSelection();
 697                         if (!textRedo(*this))
 698                                 cur.message(_("No further redo information"));
 699                         update();
 700                         switchKeyMap();
 701                 }
 702                 break;
 703
 704         case LFUN_FILE_INSERT:
 705                 // FIXME: We don't know the encoding of filenames
 706                 menuInsertLyXFile(to_utf8(cmd.argument()));
 707                 break;
 708
 709         case LFUN_FILE_INSERT_ASCII_PARA:
 710                 // FIXME: We don't know the encoding of filenames
 711                 insertAsciiFile(this, to_utf8(cmd.argument()), true);
 712                 break;
 713
 714         case LFUN_FILE_INSERT_ASCII:
 715                 // FIXME: We don't know the encoding of filenames
 716                 insertAsciiFile(this, to_utf8(cmd.argument()), false);
 717                 break;
 718
 719         case LFUN_FONT_STATE:
 720                 cur.message(from_utf8(cur.currentState()));
 721                 break;
 722
 723         case LFUN_BOOKMARK_SAVE:
 724                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 725                 break;
 726
 727         case LFUN_LABEL_GOTO: {
 728                 docstring label = cmd.argument();
 729                 if (label.empty()) {
 730                         InsetRef * inset =
 731                                 getInsetByCode<InsetRef>(cursor_,
 732                                                          InsetBase::REF_CODE);
 733                         if (inset) {
 734                                 label = inset->getParam("reference");
 735                                 // persistent=false: use temp_bookmark
 736                                 saveBookmark(false);
 737                         }
 738                 }
 739
 740                 if (!label.empty())
 741                         gotoLabel(label);
 742                 break;
 743         }
 744
 745         case LFUN_PARAGRAPH_GOTO: {
 746                 int const id = convert<int>(to_utf8(cmd.argument()));
 747                 int i = 0;
 748                 for (Buffer * b = buffer_; i == 0 || b != buffer_; b = theBufferList().next(b)) {
 749                         ParIterator par = b->getParFromID(id);
 750                         if (par == b->par_iterator_end()) {
 751                                 lyxerr[Debug::INFO]
 752                                         << "No matching paragraph found! ["
 753                                         << id << "]." << endl;
 754                         } else {
 755                                 lyxerr[Debug::INFO]
 756                                         << "Paragraph " << par->id()
 757                                         << " found in buffer `"
 758                                         << b->fileName() << "'." << endl;
 759
 760                                 if (b == buffer_) {
 761                                         // Set the cursor
 762                                         setCursor(makeDocIterator(par, 0));
 763                                         update();
 764                                         switchKeyMap();
 765                                 } else {
 766                                         // Switch to other buffer view and resend cmd
 767                                         theLyXFunc().dispatch(FuncRequest(
 768                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 769                                         theLyXFunc().dispatch(cmd);
 770                                 }
 771                                 break;
 772                         }
 773                         ++i;
 774                 }
 775                 break;
 776         }
 777
 778         case LFUN_OUTLINE_UP:
 779                 toc::outline(toc::Up, cursor_);
 780                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 781                 updateLabels(*buffer_);
 782                 break;
 783         case LFUN_OUTLINE_DOWN:
 784                 toc::outline(toc::Down, cursor_);
 785                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 786                 updateLabels(*buffer_);
 787                 break;
 788         case LFUN_OUTLINE_IN:
 789                 toc::outline(toc::In, cursor_);
 790                 updateLabels(*buffer_);
 791                 break;
 792         case LFUN_OUTLINE_OUT:
 793                 toc::outline(toc::Out, cursor_);
 794                 updateLabels(*buffer_);
 795                 break;
 796
 797         case LFUN_NOTE_NEXT:
 798                 bv_funcs::gotoInset(this, InsetBase::NOTE_CODE, false);
 799                 break;
 800
 801         case LFUN_REFERENCE_NEXT: {
 802                 vector<InsetBase_code> tmp;
 803                 tmp.push_back(InsetBase::LABEL_CODE);
 804                 tmp.push_back(InsetBase::REF_CODE);
 805                 bv_funcs::gotoInset(this, tmp, true);
 806                 break;
 807         }
 808
 809         case LFUN_CHANGES_TRACK:
 810                 buffer_->params().trackChanges = !buffer_->params().trackChanges;
 811                 break;
 812
 813         case LFUN_CHANGES_OUTPUT: {
 814                 buffer_->params().outputChanges = !buffer_->params().outputChanges;
 815                 break;
 816         }
 817
 818         case LFUN_CHANGE_NEXT:
 819                 findNextChange(this);
 820                 break;
 821
 822         case LFUN_CHANGES_MERGE:
 823                 if (findNextChange(this))
 824                         showDialog("changes");
 825                 break;
 826
 827         case LFUN_ALL_CHANGES_ACCEPT: {
 828                 cursor_.reset(buffer_->inset());
 829 #ifdef WITH_WARNINGS
 830 #warning FIXME changes
 831 #endif
 832                 while (findNextChange(this))
 833                         getLyXText()->acceptChange(cursor_);
 834                 update();
 835                 break;
 836         }
 837
 838         case LFUN_ALL_CHANGES_REJECT: {
 839                 cursor_.reset(buffer_->inset());
 840 #ifdef WITH_WARNINGS
 841 #warning FIXME changes
 842 #endif
 843                 while (findNextChange(this))
 844                         getLyXText()->rejectChange(cursor_);
 845                 break;
 846         }
 847
 848         case LFUN_WORD_FIND:
 849                 find(this, cmd);
 850                 break;
 851
 852         case LFUN_WORD_REPLACE:
 853                 replace(this, cmd);
 854                 break;
 855
 856         case LFUN_MARK_OFF:
 857                 cur.clearSelection();
 858                 cur.resetAnchor();
 859                 cur.message(from_utf8(N_("Mark off")));
 860                 break;
 861
 862         case LFUN_MARK_ON:
 863                 cur.clearSelection();
 864                 cur.mark() = true;
 865                 cur.resetAnchor();
 866                 cur.message(from_utf8(N_("Mark on")));
 867                 break;
 868
 869         case LFUN_MARK_TOGGLE:
 870                 cur.clearSelection();
 871                 if (cur.mark()) {
 872                         cur.mark() = false;
 873                         cur.message(from_utf8(N_("Mark removed")));
 874                 } else {
 875                         cur.mark() = true;
 876                         cur.message(from_utf8(N_("Mark set")));
 877                 }
 878                 cur.resetAnchor();
 879                 break;
 880
 881         case LFUN_SCREEN_RECENTER:
 882                 center();
 883                 break;
 884
 885         case LFUN_BIBTEX_DATABASE_ADD: {
 886                 LCursor tmpcur = cursor_;
 887                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 888                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 889                                                 InsetBase::BIBTEX_CODE);
 890                 if (inset) {
 891                         if (inset->addDatabase(to_utf8(cmd.argument())))
 892                                 buffer_->updateBibfilesCache();
 893                 }
 894                 break;
 895         }
 896
 897         case LFUN_BIBTEX_DATABASE_DEL: {
 898                 LCursor tmpcur = cursor_;
 899                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 900                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 901                                                 InsetBase::BIBTEX_CODE);
 902                 if (inset) {
 903                         if (inset->delDatabase(to_utf8(cmd.argument())))
 904                                 buffer_->updateBibfilesCache();
 905                 }
 906                 break;
 907         }
 908
 909         case LFUN_WORDS_COUNT: {
 910                 DocIterator from, to;
 911                 if (cur.selection()) {
 912                         from = cur.selectionBegin();
 913                         to = cur.selectionEnd();
 914                 } else {
 915                         from = doc_iterator_begin(buffer_->inset());
 916                         to = doc_iterator_end(buffer_->inset());
 917                 }
 918                 int const count = countWords(from, to);
 919                 docstring message;
 920                 if (count != 1) {
 921                         if (cur.selection())
 922                                 message = bformat(_("%1$d words in selection."),
 923                                           count);
 924                                 else
 925                                         message = bformat(_("%1$d words in document."),
 926                                                           count);
 927                 }
 928                 else {
 929                         if (cur.selection())
 930                                 message = _("One word in selection.");
 931                         else
 932                                 message = _("One word in document.");
 933                 }
 934
 935                 Alert::information(_("Count words"), message);
 936         }
 937                 break;
 938
 939         case LFUN_BUFFER_TOGGLE_COMPRESSION:
 940                 // turn compression on/off
 941                 buffer_->params().compressed = !buffer_->params().compressed;
 942                 break;
 943
 944         case LFUN_NEXT_INSET_TOGGLE: {
 945                 // this is the real function we want to invoke
 946                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
 947                 // if there is an inset at cursor, see whether it
 948                 // wants to toggle.
 949                 InsetBase * inset = cur.nextInset();
 950                 if (inset && inset->isActive()) {
 951                         LCursor tmpcur = cur;
 952                         tmpcur.pushLeft(*inset);
 953                         inset->dispatch(tmpcur, tmpcmd);
 954                         if (tmpcur.result().dispatched()) {
 955                                 cur.dispatched();
 956                         }
 957                 }
 958                 // if it did not work, try the underlying inset.
 959                 if (!cur.result().dispatched())
 960                         cur.dispatch(tmpcmd);
 961
 962                 if (cur.result().dispatched())
 963                         cur.clearSelection();
 964
 965                 break;
 966         }
 967
 968         default:
 969                 return false;
 970         }
 971
 972         return true;
 973 }
 974
 975
 976 docstring const BufferView::requestSelection()
 977 {
 978         if (!buffer_)
 979                 return docstring();
 980
 981         LCursor & cur = cursor_;
 982
 983         if (!cur.selection()) {
 984                 xsel_cache_.set = false;
 985                 return docstring();
 986         }
 987
 988         if (!xsel_cache_.set ||
 989             cur.top() != xsel_cache_.cursor ||
 990             cur.anchor_.top() != xsel_cache_.anchor)
 991         {
 992                 xsel_cache_.cursor = cur.top();
 993                 xsel_cache_.anchor = cur.anchor_.top();
 994                 xsel_cache_.set = cur.selection();
 995                 return cur.selectionAsString(false);
 996         }
 997         return docstring();
 998 }
 999
1000
1001 void BufferView::clearSelection()
1002 {
1003         if (buffer_) {
1004                 cursor_.clearSelection();
1005                 xsel_cache_.set = false;
1006         }
1007 }
1008
1009
1010 void BufferView::workAreaResize(int width, int height)
1011 {
1012         bool const widthChange = width != width_;
1013         bool const heightChange = height != height_;
1014
1015         // Update from work area
1016         width_ = width;
1017         height_ = height;
1018
1019         if (buffer_)
1020                 resize();
1021
1022         update();
1023 }
1024
1025
1026 std::pair<bool, bool> BufferView::workAreaDispatch(FuncRequest const & cmd0)
1027 {
1028         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1029
1030         // This is only called for mouse related events including
1031         // LFUN_FILE_OPEN generated by drag-and-drop.
1032         FuncRequest cmd = cmd0;
1033
1034         // E.g. Qt mouse press when no buffer
1035         if (!buffer_)
1036                 return make_pair(false, false);
1037
1038         LCursor cur(*this);
1039         cur.push(buffer_->inset());
1040         cur.selection() = cursor_.selection();
1041
1042         // Either the inset under the cursor or the
1043         // surrounding LyXText will handle this event.
1044
1045         // Build temporary cursor.
1046         cmd.y = min(max(cmd.y, -1), height_);
1047         InsetBase * inset = buffer_->text().editXY(cur, cmd.x, cmd.y);
1048
1049         //lyxerr << BOOST_CURRENT_FUNCTION
1050         //       << " * hit inset at tip: " << inset << endl;
1051         //lyxerr << BOOST_CURRENT_FUNCTION
1052         //       << " * created temp cursor:" << cur << endl;
1053
1054         // Put anchor at the same position.
1055         cur.resetAnchor();
1056
1057         // Try to dispatch to an non-editable inset near this position
1058         // via the temp cursor. If the inset wishes to change the real
1059         // cursor it has to do so explicitly by using
1060         //  cur.bv().cursor() = cur;  (or similar)
1061         if (inset) {
1062                 inset->dispatch(cur, cmd);
1063         }
1064
1065         // Now dispatch to the temporary cursor. If the real cursor should
1066         // be modified, the inset's dispatch has to do so explicitly.
1067         if (!cur.result().dispatched())
1068                 cur.dispatch(cmd);
1069
1070         // Redraw if requested and necessary.
1071         if (cur.result().dispatched() && cur.result().update())
1072                 return update(cur.result().update());
1073
1074         // When the above and the inner function are fixed, we can do this:
1075         return make_pair(false, false);
1076 }
1077
1078
1079 void BufferView::scroll(int /*lines*/)
1080 {
1081 //      if (!buffer_)
1082 //              return;
1083 //
1084 //      LyXText const * t = &buffer_->text();
1085 //      int const line_height = defaultRowHeight();
1086 //
1087 //      // The new absolute coordinate
1088 //      int new_top_y = top_y() + lines * line_height;
1089 //
1090 //      // Restrict to a valid value
1091 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
1092 //      new_top_y = std::max(0, new_top_y);
1093 //
1094 //      scrollDocView(new_top_y);
1095 //
1096 //      // Update the scrollbar.
1097 //      workArea_->setScrollbarParams(t->height(), top_y(), defaultRowHeight());}
1098 }
1099
1100
1101 void BufferView::setCursorFromRow(int row)
1102 {
1103         int tmpid = -1;
1104         int tmppos = -1;
1105
1106         buffer_->texrow().getIdFromRow(row, tmpid, tmppos);
1107
1108         if (tmpid == -1)
1109                 buffer_->text().setCursor(cursor_, 0, 0);
1110         else
1111                 buffer_->text().setCursor(cursor_, buffer_->getParFromID(tmpid).pit(), tmppos);
1112 }
1113
1114
1115 void BufferView::gotoLabel(docstring const & label)
1116 {
1117         for (InsetIterator it = inset_iterator_begin(buffer_->inset()); it; ++it) {
1118                 vector<docstring> labels;
1119                 it->getLabelList(*buffer_, labels);
1120                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1121                         setCursor(it);
1122                         update();
1123                         return;
1124                 }
1125         }
1126 }
1127
1128
1129 LyXText * BufferView::getLyXText()
1130 {
1131         LyXText * text = cursor_.innerText();
1132         BOOST_ASSERT(text);
1133         return text;
1134 }
1135
1136
1137 LyXText const * BufferView::getLyXText() const
1138 {
1139         LyXText const * text = cursor_.innerText();
1140         BOOST_ASSERT(text);
1141         return text;
1142 }
1143
1144
1145 int BufferView::workHeight() const
1146 {
1147         return height_;
1148 }
1149
1150
1151 void BufferView::setCursor(DocIterator const & dit)
1152 {
1153         size_t const n = dit.depth();
1154         for (size_t i = 0; i < n; ++i)
1155                 dit[i].inset().edit(cursor_, true);
1156
1157         cursor_.setCursor(dit);
1158         cursor_.selection() = false;
1159 }
1160
1161
1162 void BufferView::mouseSetCursor(LCursor & cur)
1163 {
1164         BOOST_ASSERT(&cur.bv() == this);
1165
1166         // Has the cursor just left the inset?
1167         bool badcursor = false;
1168         if (&cursor_.inset() != &cur.inset())
1169                 badcursor = cursor_.inset().notifyCursorLeaves(cursor_);
1170
1171         // do the dEPM magic if needed
1172         // FIXME: move this to InsetText::notifyCursorLeaves?
1173         if (!badcursor && cursor_.inTexted())
1174                 cursor_.text()->deleteEmptyParagraphMechanism(cur, cursor_);
1175
1176         cursor_ = cur;
1177         cursor_.clearSelection();
1178         cursor_.setTargetX();
1179         finishUndo();
1180
1181 }
1182
1183
1184 void BufferView::putSelectionAt(DocIterator const & cur,
1185                                 int length, bool backwards)
1186 {
1187         cursor_.clearSelection();
1188
1189         setCursor(cur);
1190
1191         if (length) {
1192                 if (backwards) {
1193                         cursor_.pos() += length;
1194                         cursor_.setSelection(cursor_, -length);
1195                 } else
1196                         cursor_.setSelection(cursor_, length);
1197         }
1198 }
1199
1200
1201 LCursor & BufferView::cursor()
1202 {
1203         return cursor_;
1204 }
1205
1206
1207 LCursor const & BufferView::cursor() const
1208 {
1209         return cursor_;
1210 }
1211
1212
1213 pit_type BufferView::anchor_ref() const
1214 {
1215         return anchor_ref_;
1216 }
1217
1218
1219 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1220 {
1221         return metrics_info_;
1222 }
1223
1224
1225 void BufferView::updateMetrics(bool singlepar)
1226 {
1227         // Clear out the position cache in case of full screen redraw.
1228         if (!singlepar)
1229                 coord_cache_.clear();
1230
1231         LyXText & buftext = buffer_->text();
1232         pit_type size = int(buftext.paragraphs().size());
1233
1234         if (anchor_ref_ > int(buftext.paragraphs().size() - 1)) {
1235                 anchor_ref_ = int(buftext.paragraphs().size() - 1);
1236                 offset_ref_ = 0;
1237         }
1238
1239         pit_type const pit = anchor_ref_;
1240         int pit1 = pit;
1241         int pit2 = pit;
1242         size_t const npit = buftext.paragraphs().size();
1243
1244         // Rebreak anchor paragraph. In Single Paragraph mode, rebreak only
1245         // the (main text, not inset!) paragraph containing the cursor.
1246         // (if this paragraph contains insets etc., rebreaking will
1247         // recursively descend)
1248         if (!singlepar || pit == cursor_.bottom().pit())
1249                 buftext.redoParagraph(*this, pit);
1250         int y0 = buftext.getPar(pit).ascent() - offset_ref_;
1251
1252         // Redo paragraphs above anchor if necessary; again, in Single Par
1253         // mode, only if we encounter the (main text) one having the cursor.
1254         int y1 = y0;
1255         while (y1 > 0 && pit1 > 0) {
1256                 y1 -= buftext.getPar(pit1).ascent();
1257                 --pit1;
1258                 if (!singlepar || pit1 == cursor_.bottom().pit())
1259                         buftext.redoParagraph(*this, pit1);
1260                 y1 -= buftext.getPar(pit1).descent();
1261         }
1262
1263
1264         // Take care of ascent of first line
1265         y1 -= buftext.getPar(pit1).ascent();
1266
1267         // Normalize anchor for next time
1268         anchor_ref_ = pit1;
1269         offset_ref_ = -y1;
1270
1271         // Grey at the beginning is ugly
1272         if (pit1 == 0 && y1 > 0) {
1273                 y0 -= y1;
1274                 y1 = 0;
1275                 anchor_ref_ = 0;
1276         }
1277
1278         // Redo paragraphs below the anchor if necessary. Single par mode:
1279         // only the one containing the cursor if encountered.
1280         int y2 = y0;
1281         while (y2 < height_ && pit2 < int(npit) - 1) {
1282                 y2 += buftext.getPar(pit2).descent();
1283                 ++pit2;
1284                 if (!singlepar || pit2 == cursor_.bottom().pit())
1285                         buftext.redoParagraph(*this, pit2);
1286                 y2 += buftext.getPar(pit2).ascent();
1287         }
1288
1289         // Take care of descent of last line
1290         y2 += buftext.getPar(pit2).descent();
1291
1292         // The coordinates of all these paragraphs are correct, cache them
1293         int y = y1;
1294         CoordCache::InnerParPosCache & parPos = coord_cache_.parPos()[&buftext];
1295         for (pit_type pit = pit1; pit <= pit2; ++pit) {
1296                 Paragraph const & par = buftext.getPar(pit);
1297                 y += par.ascent();
1298                 parPos[pit] = Point(0, y);
1299                 if (singlepar && pit == cursor_.bottom().pit()) {
1300                         // In Single Paragraph mode, collect here the
1301                         // y1 and y2 of the (one) paragraph the cursor is in
1302                         y1 = y - par.ascent();
1303                         y2 = y + par.descent();
1304                 }
1305                 y += par.descent();
1306         }
1307
1308         if (singlepar) {
1309                 // collect cursor paragraph iter bounds
1310                 pit1 = cursor_.bottom().pit();
1311                 pit2 = cursor_.bottom().pit();
1312         }
1313
1314         lyxerr[Debug::DEBUG]
1315                 << BOOST_CURRENT_FUNCTION
1316                 << " y1: " << y1
1317                 << " y2: " << y2
1318                 << " pit1: " << pit1
1319                 << " pit2: " << pit2
1320                 << " npit: " << npit
1321                 << " singlepar: " << singlepar
1322                 << "size: " << size
1323                 << endl;
1324
1325         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2, singlepar, size);
1326
1327         if (lyxerr.debugging(Debug::WORKAREA)) {
1328                 lyxerr[Debug::WORKAREA] << "BufferView::updateMetrics" << endl;
1329                 coord_cache_.dump();
1330         }
1331 }
1332
1333
1334 void BufferView::menuInsertLyXFile(string const & filenm)
1335 {
1336         BOOST_ASSERT(cursor_.inTexted());
1337         string filename = filenm;
1338
1339         if (filename.empty()) {
1340                 // Launch a file browser
1341                 // FIXME UNICODE
1342                 string initpath = lyxrc.document_path;
1343
1344                 if (buffer_) {
1345                         string const trypath = buffer_->filePath();
1346                         // If directory is writeable, use this as default.
1347                         if (isDirWriteable(trypath))
1348                                 initpath = trypath;
1349                 }
1350
1351                 // FIXME UNICODE
1352                 FileDialog fileDlg(_("Select LyX document to insert"),
1353                         LFUN_FILE_INSERT,
1354                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1355                         make_pair(_("Examples|#E#e"), from_utf8(addPath(package().system_support(), "examples"))));
1356
1357                 FileDialog::Result result =
1358                         fileDlg.open(from_utf8(initpath),
1359                                      FileFilterList(_("LyX Documents (*.lyx)")),
1360                                      docstring());
1361
1362                 if (result.first == FileDialog::Later)
1363                         return;
1364
1365                 // FIXME UNICODE
1366                 filename = to_utf8(result.second);
1367
1368                 // check selected filename
1369                 if (filename.empty()) {
1370                         // emit message signal.
1371                         message(_("Canceled."));
1372                         return;
1373                 }
1374         }
1375
1376         // Get absolute path of file and add ".lyx"
1377         // to the filename if necessary
1378         filename = fileSearch(string(), filename, "lyx");
1379
1380         docstring const disp_fn = makeDisplayPath(filename);
1381         // emit message signal.
1382         message(bformat(_("Inserting document %1$s..."), disp_fn));
1383
1384         docstring res;
1385         Buffer buf("", false);
1386         if (lyx::loadLyXFile(&buf, makeAbsPath(filename))) {
1387                 ErrorList & el = buffer_->errorList("Parse");
1388                 // Copy the inserted document error list into the current buffer one.
1389                 el = buf.errorList("Parse");
1390                 recordUndo(cursor_);
1391                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1392                                              buf.params().textclass, el);
1393                 res = _("Document %1$s inserted.");
1394         } else
1395                 res = _("Could not insert document %1$s");
1396
1397         // emit message signal.
1398         message(bformat(res, disp_fn));
1399         buffer_->errors("Parse");
1400         resize();
1401 }
1402
1403
1404 } // namespace lyx