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