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").absFilename();
 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         if (flags == Update::FitCursor) {
 379                 bool const fit_cursor = fitCursor();
 380                 if (fit_cursor)
 381                         updateMetrics(false);
 382                 // tell the frontend to update the screen.
 383                 return make_pair(fit_cursor, false);
 384         }
 385
 386         bool full_metrics = flags & Update::Force;
 387         if (flags & Update::MultiParSel)
 388                 full_metrics |= multiParSel();
 389
 390         bool const single_par = !full_metrics;
 391         updateMetrics(single_par);
 392
 393         if (flags & Update::FitCursor && fitCursor())
 394                 updateMetrics(false);
 395
 396         // tell the frontend to update the screen.
 397         return make_pair(true, single_par);
 398 }
 399
 400
 401 void BufferView::updateScrollbar()
 402 {
 403         if (!buffer_) {
 404                 lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION
 405                                      << " no text in updateScrollbar" << endl;
 406                 scrollbarParameters_.reset();
 407                 return;
 408         }
 409
 410         LyXText & t = buffer_->text();
 411         int const parsize = int(t.paragraphs().size() - 1);
 412         if (anchor_ref_ >  parsize)  {
 413                 anchor_ref_ = parsize;
 414                 offset_ref_ = 0;
 415         }
 416
 417         if (lyxerr.debugging(Debug::GUI)) {
 418                 lyxerr[Debug::GUI]
 419                         << BOOST_CURRENT_FUNCTION
 420                         << " Updating scrollbar: height: " << t.paragraphs().size()
 421                         << " curr par: " << cursor_.bottom().pit()
 422                         << " default height " << defaultRowHeight() << endl;
 423         }
 424
 425         // It would be better to fix the scrollbar to understand
 426         // values in [0..1] and divide everything by wh
 427
 428         // estimated average paragraph height:
 429         if (wh_ == 0)
 430                 wh_ = height_ / 4;
 431         int h = t.getPar(anchor_ref_).height();
 432
 433         // Normalize anchor/offset (MV):
 434         while (offset_ref_ > h && anchor_ref_ < parsize) {
 435                 anchor_ref_++;
 436                 offset_ref_ -= h;
 437                 h = t.getPar(anchor_ref_).height();
 438         }
 439         // Look at paragraph heights on-screen
 440         int sumh = 0;
 441         int nh = 0;
 442         for (pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 443                 if (sumh > height_)
 444                         break;
 445                 int const h2 = t.getPar(pit).height();
 446                 sumh += h2;
 447                 nh++;
 448         }
 449
 450         BOOST_ASSERT(nh);
 451         int const hav = sumh / nh;
 452         // More realistic average paragraph height
 453         if (hav > wh_)
 454                 wh_ = hav;
 455
 456         BOOST_ASSERT(h);
 457         scrollbarParameters_.height = (parsize + 1) * wh_;
 458         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 459         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 460 }
 461
 462
 463 ScrollbarParameters const & BufferView::scrollbarParameters() const
 464 {
 465         return scrollbarParameters_;
 466 }
 467
 468
 469 void BufferView::scrollDocView(int value)
 470 {
 471         lyxerr[Debug::GUI] << BOOST_CURRENT_FUNCTION
 472                            << "[ value = " << value << "]" << endl;
 473
 474         if (!buffer_)
 475                 return;
 476
 477         LyXText & t = buffer_->text();
 478
 479         float const bar = value / float(wh_ * t.paragraphs().size());
 480
 481         anchor_ref_ = int(bar * t.paragraphs().size());
 482         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 483                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 484         t.redoParagraph(*this, anchor_ref_);
 485         int const h = t.getPar(anchor_ref_).height();
 486         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 487         updateMetrics(false);
 488 }
 489
 490
 491 void BufferView::setCursorFromScrollbar()
 492 {
 493         LyXText & t = buffer_->text();
 494
 495         int const height = 2 * defaultRowHeight();
 496         int const first = height;
 497         int const last = height_ - height;
 498         LCursor & cur = cursor_;
 499
 500         bv_funcs::CurStatus st = bv_funcs::status(this, cur);
 501
 502         switch (st) {
 503         case bv_funcs::CUR_ABOVE:
 504                 t.setCursorFromCoordinates(cur, 0, first);
 505                 cur.clearSelection();
 506                 break;
 507         case bv_funcs::CUR_BELOW:
 508                 t.setCursorFromCoordinates(cur, 0, last);
 509                 cur.clearSelection();
 510                 break;
 511         case bv_funcs::CUR_INSIDE:
 512                 int const y = bv_funcs::getPos(*this, cur, cur.boundary()).y_;
 513                 int const newy = min(last, max(y, first));
 514                 if (y != newy) {
 515                         cur.reset(buffer_->inset());
 516                         t.setCursorFromCoordinates(cur, 0, newy);
 517                 }
 518         }
 519 }
 520
 521
 522 Change const BufferView::getCurrentChange() const
 523 {
 524         if (!cursor_.selection())
 525                 return Change(Change::UNCHANGED);
 526
 527         DocIterator dit = cursor_.selectionBegin();
 528         return dit.paragraph().lookupChange(dit.pos());
 529 }
 530
 531
 532 void BufferView::saveBookmark(bool persistent)
 533 {
 534         LyX::ref().session().bookmarks().save(
 535                 buffer_->fileName(),
 536                 cursor_.paragraph().id(),
 537                 cursor_.pos(),
 538                 persistent
 539         );
 540         if (persistent)
 541                 // emit message signal.
 542                 message(_("Save bookmark"));
 543 }
 544
 545
 546 void BufferView::moveToPosition(int par_id, pos_type par_pos)
 547 {
 548         cursor_.clearSelection();
 549
 550         ParIterator par = buffer_->getParFromID(par_id);
 551         if (par == buffer_->par_iterator_end())
 552                 return;
 553
 554         setCursor(makeDocIterator(par, min(par->size(), par_pos)));
 555 }
 556
 557
 558 void BufferView::switchKeyMap()
 559 {
 560         if (!lyxrc.rtl_support)
 561                 return;
 562
 563         if (getLyXText()->real_current_font.isRightToLeft()) {
 564                 if (intl_->keymap == Intl::PRIMARY)
 565                         intl_->keyMapSec();
 566         } else {
 567                 if (intl_->keymap == Intl::SECONDARY)
 568                         intl_->keyMapPrim();
 569         }
 570 }
 571
 572
 573 int BufferView::workWidth() const
 574 {
 575         return width_;
 576 }
 577
 578
 579 void BufferView::center()
 580 {
 581         CursorSlice & bot = cursor_.bottom();
 582         pit_type const pit = bot.pit();
 583         bot.text()->redoParagraph(*this, pit);
 584         Paragraph const & par = bot.text()->paragraphs()[pit];
 585         anchor_ref_ = pit;
 586         offset_ref_ = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary()).y_
 587                 + par.ascent() - height_ / 2;
 588 }
 589
 590
 591 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 592 {
 593         FuncStatus flag;
 594
 595         switch (cmd.action) {
 596
 597         case LFUN_UNDO:
 598                 flag.enabled(!buffer_->undostack().empty());
 599                 break;
 600         case LFUN_REDO:
 601                 flag.enabled(!buffer_->redostack().empty());
 602                 break;
 603         case LFUN_FILE_INSERT:
 604         case LFUN_FILE_INSERT_ASCII_PARA:
 605         case LFUN_FILE_INSERT_ASCII:
 606         case LFUN_BOOKMARK_SAVE:
 607                 // FIXME: Actually, these LFUNS should be moved to LyXText
 608                 flag.enabled(cursor_.inTexted());
 609                 break;
 610         case LFUN_FONT_STATE:
 611         case LFUN_LABEL_INSERT:
 612         case LFUN_PARAGRAPH_GOTO:
 613         // FIXME handle non-trivially
 614         case LFUN_OUTLINE_UP:
 615         case LFUN_OUTLINE_DOWN:
 616         case LFUN_OUTLINE_IN:
 617         case LFUN_OUTLINE_OUT:
 618         case LFUN_NOTE_NEXT:
 619         case LFUN_REFERENCE_NEXT:
 620         case LFUN_WORD_FIND:
 621         case LFUN_WORD_REPLACE:
 622         case LFUN_MARK_OFF:
 623         case LFUN_MARK_ON:
 624         case LFUN_MARK_TOGGLE:
 625         case LFUN_SCREEN_RECENTER:
 626         case LFUN_BIBTEX_DATABASE_ADD:
 627         case LFUN_BIBTEX_DATABASE_DEL:
 628         case LFUN_WORDS_COUNT:
 629         case LFUN_NEXT_INSET_TOGGLE:
 630                 flag.enabled(true);
 631                 break;
 632
 633         case LFUN_LABEL_GOTO: {
 634                 flag.enabled(!cmd.argument().empty()
 635                     || getInsetByCode<InsetRef>(cursor_, InsetBase::REF_CODE));
 636                 break;
 637         }
 638
 639         case LFUN_CHANGES_TRACK:
 640                 flag.enabled(true);
 641                 flag.setOnOff(buffer_->params().trackChanges);
 642                 break;
 643
 644         case LFUN_CHANGES_OUTPUT: {
 645                 OutputParams runparams;
 646                 LaTeXFeatures features(*buffer_, buffer_->params(), runparams);
 647                 flag.enabled(buffer_ && features.isAvailable("dvipost"));
 648                 flag.setOnOff(buffer_->params().outputChanges);
 649                 break;
 650         }
 651
 652         case LFUN_CHANGES_MERGE:
 653         case LFUN_CHANGE_NEXT:
 654         case LFUN_ALL_CHANGES_ACCEPT:
 655         case LFUN_ALL_CHANGES_REJECT:
 656                 // TODO: context-sensitive enabling of LFUNs
 657                 // In principle, these command should only be enabled if there
 658                 // is a change in the document. However, without proper
 659                 // optimizations, this will inevitably result in poor performance.
 660                 flag.enabled(buffer_);
 661                 break;
 662
 663         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 664                 flag.setOnOff(buffer_->params().compressed);
 665                 break;
 666         }
 667
 668         default:
 669                 flag.enabled(false);
 670         }
 671
 672         return flag;
 673 }
 674
 675
 676 bool BufferView::dispatch(FuncRequest const & cmd)
 677 {
 678         //lyxerr << BOOST_CURRENT_FUNCTION
 679         //       << [ cmd = " << cmd << "]" << endl;
 680
 681         // Make sure that the cached BufferView is correct.
 682         lyxerr[Debug::ACTION] << BOOST_CURRENT_FUNCTION
 683                 << " action[" << cmd.action << ']'
 684                 << " arg[" << to_utf8(cmd.argument()) << ']'
 685                 << " x[" << cmd.x << ']'
 686                 << " y[" << cmd.y << ']'
 687                 << " button[" << cmd.button() << ']'
 688                 << endl;
 689
 690         LCursor & cur = cursor_;
 691
 692         switch (cmd.action) {
 693
 694         case LFUN_UNDO:
 695                 if (buffer_) {
 696                         cur.message(_("Undo"));
 697                         cur.clearSelection();
 698                         if (!textUndo(*this))
 699                                 cur.message(_("No further undo information"));
 700                         update();
 701                         switchKeyMap();
 702                 }
 703                 break;
 704
 705         case LFUN_REDO:
 706                 if (buffer_) {
 707                         cur.message(_("Redo"));
 708                         cur.clearSelection();
 709                         if (!textRedo(*this))
 710                                 cur.message(_("No further redo information"));
 711                         update();
 712                         switchKeyMap();
 713                 }
 714                 break;
 715
 716         case LFUN_FILE_INSERT:
 717                 // FIXME: We don't know the encoding of filenames
 718                 menuInsertLyXFile(to_utf8(cmd.argument()));
 719                 break;
 720
 721         case LFUN_FILE_INSERT_ASCII_PARA:
 722                 // FIXME: We don't know the encoding of filenames
 723                 insertAsciiFile(this, to_utf8(cmd.argument()), true);
 724                 break;
 725
 726         case LFUN_FILE_INSERT_ASCII:
 727                 // FIXME: We don't know the encoding of filenames
 728                 insertAsciiFile(this, to_utf8(cmd.argument()), false);
 729                 break;
 730
 731         case LFUN_FONT_STATE:
 732                 cur.message(from_utf8(cur.currentState()));
 733                 break;
 734
 735         case LFUN_BOOKMARK_SAVE:
 736                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 737                 break;
 738
 739         case LFUN_LABEL_GOTO: {
 740                 docstring label = cmd.argument();
 741                 if (label.empty()) {
 742                         InsetRef * inset =
 743                                 getInsetByCode<InsetRef>(cursor_,
 744                                                          InsetBase::REF_CODE);
 745                         if (inset) {
 746                                 label = inset->getParam("reference");
 747                                 // persistent=false: use temp_bookmark
 748                                 saveBookmark(false);
 749                         }
 750                 }
 751
 752                 if (!label.empty())
 753                         gotoLabel(label);
 754                 break;
 755         }
 756
 757         case LFUN_PARAGRAPH_GOTO: {
 758                 int const id = convert<int>(to_utf8(cmd.argument()));
 759                 int i = 0;
 760                 for (Buffer * b = buffer_; i == 0 || b != buffer_; b = theBufferList().next(b)) {
 761                         ParIterator par = b->getParFromID(id);
 762                         if (par == b->par_iterator_end()) {
 763                                 lyxerr[Debug::INFO]
 764                                         << "No matching paragraph found! ["
 765                                         << id << "]." << endl;
 766                         } else {
 767                                 lyxerr[Debug::INFO]
 768                                         << "Paragraph " << par->id()
 769                                         << " found in buffer `"
 770                                         << b->fileName() << "'." << endl;
 771
 772                                 if (b == buffer_) {
 773                                         // Set the cursor
 774                                         setCursor(makeDocIterator(par, 0));
 775                                         update();
 776                                         switchKeyMap();
 777                                 } else {
 778                                         // Switch to other buffer view and resend cmd
 779                                         theLyXFunc().dispatch(FuncRequest(
 780                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 781                                         theLyXFunc().dispatch(cmd);
 782                                 }
 783                                 break;
 784                         }
 785                         ++i;
 786                 }
 787                 break;
 788         }
 789
 790         case LFUN_OUTLINE_UP:
 791                 toc::outline(toc::Up, cursor_);
 792                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 793                 updateLabels(*buffer_);
 794                 break;
 795         case LFUN_OUTLINE_DOWN:
 796                 toc::outline(toc::Down, cursor_);
 797                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 798                 updateLabels(*buffer_);
 799                 break;
 800         case LFUN_OUTLINE_IN:
 801                 toc::outline(toc::In, cursor_);
 802                 updateLabels(*buffer_);
 803                 break;
 804         case LFUN_OUTLINE_OUT:
 805                 toc::outline(toc::Out, cursor_);
 806                 updateLabels(*buffer_);
 807                 break;
 808
 809         case LFUN_NOTE_NEXT:
 810                 bv_funcs::gotoInset(this, InsetBase::NOTE_CODE, false);
 811                 break;
 812
 813         case LFUN_REFERENCE_NEXT: {
 814                 vector<InsetBase_code> tmp;
 815                 tmp.push_back(InsetBase::LABEL_CODE);
 816                 tmp.push_back(InsetBase::REF_CODE);
 817                 bv_funcs::gotoInset(this, tmp, true);
 818                 break;
 819         }
 820
 821         case LFUN_CHANGES_TRACK:
 822                 buffer_->params().trackChanges = !buffer_->params().trackChanges;
 823                 break;
 824
 825         case LFUN_CHANGES_OUTPUT: {
 826                 buffer_->params().outputChanges = !buffer_->params().outputChanges;
 827                 break;
 828         }
 829
 830         case LFUN_CHANGE_NEXT:
 831                 findNextChange(this);
 832                 break;
 833
 834         case LFUN_CHANGES_MERGE:
 835                 if (findNextChange(this))
 836                         showDialog("changes");
 837                 break;
 838
 839         case LFUN_ALL_CHANGES_ACCEPT: {
 840                 cursor_.reset(buffer_->inset());
 841 #ifdef WITH_WARNINGS
 842 #warning FIXME changes
 843 #endif
 844                 while (findNextChange(this))
 845                         getLyXText()->acceptChange(cursor_);
 846                 update();
 847                 break;
 848         }
 849
 850         case LFUN_ALL_CHANGES_REJECT: {
 851                 cursor_.reset(buffer_->inset());
 852 #ifdef WITH_WARNINGS
 853 #warning FIXME changes
 854 #endif
 855                 while (findNextChange(this))
 856                         getLyXText()->rejectChange(cursor_);
 857                 break;
 858         }
 859
 860         case LFUN_WORD_FIND:
 861                 find(this, cmd);
 862                 break;
 863
 864         case LFUN_WORD_REPLACE:
 865                 replace(this, cmd);
 866                 break;
 867
 868         case LFUN_MARK_OFF:
 869                 cur.clearSelection();
 870                 cur.resetAnchor();
 871                 cur.message(from_utf8(N_("Mark off")));
 872                 break;
 873
 874         case LFUN_MARK_ON:
 875                 cur.clearSelection();
 876                 cur.mark() = true;
 877                 cur.resetAnchor();
 878                 cur.message(from_utf8(N_("Mark on")));
 879                 break;
 880
 881         case LFUN_MARK_TOGGLE:
 882                 cur.clearSelection();
 883                 if (cur.mark()) {
 884                         cur.mark() = false;
 885                         cur.message(from_utf8(N_("Mark removed")));
 886                 } else {
 887                         cur.mark() = true;
 888                         cur.message(from_utf8(N_("Mark set")));
 889                 }
 890                 cur.resetAnchor();
 891                 break;
 892
 893         case LFUN_SCREEN_RECENTER:
 894                 center();
 895                 break;
 896
 897         case LFUN_BIBTEX_DATABASE_ADD: {
 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->addDatabase(to_utf8(cmd.argument())))
 904                                 buffer_->updateBibfilesCache();
 905                 }
 906                 break;
 907         }
 908
 909         case LFUN_BIBTEX_DATABASE_DEL: {
 910                 LCursor tmpcur = cursor_;
 911                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 912                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 913                                                 InsetBase::BIBTEX_CODE);
 914                 if (inset) {
 915                         if (inset->delDatabase(to_utf8(cmd.argument())))
 916                                 buffer_->updateBibfilesCache();
 917                 }
 918                 break;
 919         }
 920
 921         case LFUN_WORDS_COUNT: {
 922                 DocIterator from, to;
 923                 if (cur.selection()) {
 924                         from = cur.selectionBegin();
 925                         to = cur.selectionEnd();
 926                 } else {
 927                         from = doc_iterator_begin(buffer_->inset());
 928                         to = doc_iterator_end(buffer_->inset());
 929                 }
 930                 int const count = countWords(from, to);
 931                 docstring message;
 932                 if (count != 1) {
 933                         if (cur.selection())
 934                                 message = bformat(_("%1$d words in selection."),
 935                                           count);
 936                                 else
 937                                         message = bformat(_("%1$d words in document."),
 938                                                           count);
 939                 }
 940                 else {
 941                         if (cur.selection())
 942                                 message = _("One word in selection.");
 943                         else
 944                                 message = _("One word in document.");
 945                 }
 946
 947                 Alert::information(_("Count words"), message);
 948         }
 949                 break;
 950
 951         case LFUN_BUFFER_TOGGLE_COMPRESSION:
 952                 // turn compression on/off
 953                 buffer_->params().compressed = !buffer_->params().compressed;
 954                 break;
 955
 956         case LFUN_NEXT_INSET_TOGGLE: {
 957                 // this is the real function we want to invoke
 958                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
 959                 // if there is an inset at cursor, see whether it
 960                 // wants to toggle.
 961                 InsetBase * inset = cur.nextInset();
 962                 if (inset && inset->isActive()) {
 963                         LCursor tmpcur = cur;
 964                         tmpcur.pushLeft(*inset);
 965                         inset->dispatch(tmpcur, tmpcmd);
 966                         if (tmpcur.result().dispatched()) {
 967                                 cur.dispatched();
 968                         }
 969                 }
 970                 // if it did not work, try the underlying inset.
 971                 if (!cur.result().dispatched())
 972                         cur.dispatch(tmpcmd);
 973
 974                 if (cur.result().dispatched())
 975                         cur.clearSelection();
 976
 977                 break;
 978         }
 979
 980         default:
 981                 return false;
 982         }
 983
 984         return true;
 985 }
 986
 987
 988 docstring const BufferView::requestSelection()
 989 {
 990         if (!buffer_)
 991                 return docstring();
 992
 993         LCursor & cur = cursor_;
 994
 995         if (!cur.selection()) {
 996                 xsel_cache_.set = false;
 997                 return docstring();
 998         }
 999
1000         if (!xsel_cache_.set ||
1001             cur.top() != xsel_cache_.cursor ||
1002             cur.anchor_.top() != xsel_cache_.anchor)
1003         {
1004                 xsel_cache_.cursor = cur.top();
1005                 xsel_cache_.anchor = cur.anchor_.top();
1006                 xsel_cache_.set = cur.selection();
1007                 return cur.selectionAsString(false);
1008         }
1009         return docstring();
1010 }
1011
1012
1013 void BufferView::clearSelection()
1014 {
1015         if (buffer_) {
1016                 cursor_.clearSelection();
1017                 xsel_cache_.set = false;
1018         }
1019 }
1020
1021
1022 void BufferView::workAreaResize(int width, int height)
1023 {
1024         bool const widthChange = width != width_;
1025         bool const heightChange = height != height_;
1026
1027         // Update from work area
1028         width_ = width;
1029         height_ = height;
1030
1031         if (buffer_)
1032                 resize();
1033
1034         update();
1035 }
1036
1037
1038 std::pair<bool, bool> BufferView::workAreaDispatch(FuncRequest const & cmd0)
1039 {
1040         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1041
1042         // This is only called for mouse related events including
1043         // LFUN_FILE_OPEN generated by drag-and-drop.
1044         FuncRequest cmd = cmd0;
1045
1046         // E.g. Qt mouse press when no buffer
1047         if (!buffer_)
1048                 return make_pair(false, false);
1049
1050         LCursor cur(*this);
1051         cur.push(buffer_->inset());
1052         cur.selection() = cursor_.selection();
1053
1054         // Either the inset under the cursor or the
1055         // surrounding LyXText will handle this event.
1056
1057         // Build temporary cursor.
1058         cmd.y = min(max(cmd.y, -1), height_);
1059         InsetBase * inset = buffer_->text().editXY(cur, cmd.x, cmd.y);
1060
1061         //lyxerr << BOOST_CURRENT_FUNCTION
1062         //       << " * hit inset at tip: " << inset << endl;
1063         //lyxerr << BOOST_CURRENT_FUNCTION
1064         //       << " * created temp cursor:" << cur << endl;
1065
1066         // Put anchor at the same position.
1067         cur.resetAnchor();
1068
1069         // Try to dispatch to an non-editable inset near this position
1070         // via the temp cursor. If the inset wishes to change the real
1071         // cursor it has to do so explicitly by using
1072         //  cur.bv().cursor() = cur;  (or similar)
1073         if (inset) {
1074                 inset->dispatch(cur, cmd);
1075         }
1076
1077         // Now dispatch to the temporary cursor. If the real cursor should
1078         // be modified, the inset's dispatch has to do so explicitly.
1079         if (!cur.result().dispatched())
1080                 cur.dispatch(cmd);
1081
1082         // Redraw if requested and necessary.
1083         if (cur.result().dispatched() && cur.result().update())
1084                 return update(cur.result().update());
1085
1086         // When the above and the inner function are fixed, we can do this:
1087         return make_pair(false, false);
1088 }
1089
1090
1091 void BufferView::scroll(int /*lines*/)
1092 {
1093 //      if (!buffer_)
1094 //              return;
1095 //
1096 //      LyXText const * t = &buffer_->text();
1097 //      int const line_height = defaultRowHeight();
1098 //
1099 //      // The new absolute coordinate
1100 //      int new_top_y = top_y() + lines * line_height;
1101 //
1102 //      // Restrict to a valid value
1103 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
1104 //      new_top_y = std::max(0, new_top_y);
1105 //
1106 //      scrollDocView(new_top_y);
1107 //
1108 //      // Update the scrollbar.
1109 //      workArea_->setScrollbarParams(t->height(), top_y(), defaultRowHeight());}
1110 }
1111
1112
1113 void BufferView::setCursorFromRow(int row)
1114 {
1115         int tmpid = -1;
1116         int tmppos = -1;
1117
1118         buffer_->texrow().getIdFromRow(row, tmpid, tmppos);
1119
1120         if (tmpid == -1)
1121                 buffer_->text().setCursor(cursor_, 0, 0);
1122         else
1123                 buffer_->text().setCursor(cursor_, buffer_->getParFromID(tmpid).pit(), tmppos);
1124 }
1125
1126
1127 void BufferView::gotoLabel(docstring const & label)
1128 {
1129         for (InsetIterator it = inset_iterator_begin(buffer_->inset()); it; ++it) {
1130                 vector<docstring> labels;
1131                 it->getLabelList(*buffer_, labels);
1132                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1133                         setCursor(it);
1134                         update();
1135                         return;
1136                 }
1137         }
1138 }
1139
1140
1141 LyXText * BufferView::getLyXText()
1142 {
1143         LyXText * text = cursor_.innerText();
1144         BOOST_ASSERT(text);
1145         return text;
1146 }
1147
1148
1149 LyXText const * BufferView::getLyXText() const
1150 {
1151         LyXText const * text = cursor_.innerText();
1152         BOOST_ASSERT(text);
1153         return text;
1154 }
1155
1156
1157 int BufferView::workHeight() const
1158 {
1159         return height_;
1160 }
1161
1162
1163 void BufferView::setCursor(DocIterator const & dit)
1164 {
1165         size_t const n = dit.depth();
1166         for (size_t i = 0; i < n; ++i)
1167                 dit[i].inset().edit(cursor_, true);
1168
1169         cursor_.setCursor(dit);
1170         cursor_.selection() = false;
1171 }
1172
1173
1174 void BufferView::mouseSetCursor(LCursor & cur)
1175 {
1176         BOOST_ASSERT(&cur.bv() == this);
1177
1178         // Has the cursor just left the inset?
1179         bool badcursor = false;
1180         if (&cursor_.inset() != &cur.inset())
1181                 badcursor = cursor_.inset().notifyCursorLeaves(cursor_);
1182
1183         // do the dEPM magic if needed
1184         // FIXME: move this to InsetText::notifyCursorLeaves?
1185         if (!badcursor && cursor_.inTexted())
1186                 cursor_.text()->deleteEmptyParagraphMechanism(cur, cursor_);
1187
1188         cursor_ = cur;
1189         cursor_.clearSelection();
1190         cursor_.setTargetX();
1191         finishUndo();
1192
1193 }
1194
1195
1196 void BufferView::putSelectionAt(DocIterator const & cur,
1197                                 int length, bool backwards)
1198 {
1199         cursor_.clearSelection();
1200
1201         setCursor(cur);
1202
1203         if (length) {
1204                 if (backwards) {
1205                         cursor_.pos() += length;
1206                         cursor_.setSelection(cursor_, -length);
1207                 } else
1208                         cursor_.setSelection(cursor_, length);
1209         }
1210 }
1211
1212
1213 LCursor & BufferView::cursor()
1214 {
1215         return cursor_;
1216 }
1217
1218
1219 LCursor const & BufferView::cursor() const
1220 {
1221         return cursor_;
1222 }
1223
1224
1225 pit_type BufferView::anchor_ref() const
1226 {
1227         return anchor_ref_;
1228 }
1229
1230
1231 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1232 {
1233         return metrics_info_;
1234 }
1235
1236
1237 void BufferView::updateMetrics(bool singlepar)
1238 {
1239         // Clear out the position cache in case of full screen redraw.
1240         if (!singlepar)
1241                 coord_cache_.clear();
1242
1243         LyXText & buftext = buffer_->text();
1244         pit_type size = int(buftext.paragraphs().size());
1245
1246         if (anchor_ref_ > int(buftext.paragraphs().size() - 1)) {
1247                 anchor_ref_ = int(buftext.paragraphs().size() - 1);
1248                 offset_ref_ = 0;
1249         }
1250
1251         pit_type const pit = anchor_ref_;
1252         int pit1 = pit;
1253         int pit2 = pit;
1254         size_t const npit = buftext.paragraphs().size();
1255
1256         // Rebreak anchor paragraph. In Single Paragraph mode, rebreak only
1257         // the (main text, not inset!) paragraph containing the cursor.
1258         // (if this paragraph contains insets etc., rebreaking will
1259         // recursively descend)
1260         if (!singlepar || pit == cursor_.bottom().pit())
1261                 buftext.redoParagraph(*this, pit);
1262         int y0 = buftext.getPar(pit).ascent() - offset_ref_;
1263
1264         // Redo paragraphs above anchor if necessary; again, in Single Par
1265         // mode, only if we encounter the (main text) one having the cursor.
1266         int y1 = y0;
1267         while (y1 > 0 && pit1 > 0) {
1268                 y1 -= buftext.getPar(pit1).ascent();
1269                 --pit1;
1270                 if (!singlepar || pit1 == cursor_.bottom().pit())
1271                         buftext.redoParagraph(*this, pit1);
1272                 y1 -= buftext.getPar(pit1).descent();
1273         }
1274
1275
1276         // Take care of ascent of first line
1277         y1 -= buftext.getPar(pit1).ascent();
1278
1279         // Normalize anchor for next time
1280         anchor_ref_ = pit1;
1281         offset_ref_ = -y1;
1282
1283         // Grey at the beginning is ugly
1284         if (pit1 == 0 && y1 > 0) {
1285                 y0 -= y1;
1286                 y1 = 0;
1287                 anchor_ref_ = 0;
1288         }
1289
1290         // Redo paragraphs below the anchor if necessary. Single par mode:
1291         // only the one containing the cursor if encountered.
1292         int y2 = y0;
1293         while (y2 < height_ && pit2 < int(npit) - 1) {
1294                 y2 += buftext.getPar(pit2).descent();
1295                 ++pit2;
1296                 if (!singlepar || pit2 == cursor_.bottom().pit())
1297                         buftext.redoParagraph(*this, pit2);
1298                 y2 += buftext.getPar(pit2).ascent();
1299         }
1300
1301         // Take care of descent of last line
1302         y2 += buftext.getPar(pit2).descent();
1303
1304         // The coordinates of all these paragraphs are correct, cache them
1305         int y = y1;
1306         CoordCache::InnerParPosCache & parPos = coord_cache_.parPos()[&buftext];
1307         for (pit_type pit = pit1; pit <= pit2; ++pit) {
1308                 Paragraph const & par = buftext.getPar(pit);
1309                 y += par.ascent();
1310                 parPos[pit] = Point(0, y);
1311                 if (singlepar && pit == cursor_.bottom().pit()) {
1312                         // In Single Paragraph mode, collect here the
1313                         // y1 and y2 of the (one) paragraph the cursor is in
1314                         y1 = y - par.ascent();
1315                         y2 = y + par.descent();
1316                 }
1317                 y += par.descent();
1318         }
1319
1320         if (singlepar) {
1321                 // collect cursor paragraph iter bounds
1322                 pit1 = cursor_.bottom().pit();
1323                 pit2 = cursor_.bottom().pit();
1324         }
1325
1326         lyxerr[Debug::DEBUG]
1327                 << BOOST_CURRENT_FUNCTION
1328                 << " y1: " << y1
1329                 << " y2: " << y2
1330                 << " pit1: " << pit1
1331                 << " pit2: " << pit2
1332                 << " npit: " << npit
1333                 << " singlepar: " << singlepar
1334                 << "size: " << size
1335                 << endl;
1336
1337         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2, singlepar, size);
1338
1339         if (lyxerr.debugging(Debug::WORKAREA)) {
1340                 lyxerr[Debug::WORKAREA] << "BufferView::updateMetrics" << endl;
1341                 coord_cache_.dump();
1342         }
1343 }
1344
1345
1346 void BufferView::menuInsertLyXFile(string const & filenm)
1347 {
1348         BOOST_ASSERT(cursor_.inTexted());
1349         string filename = filenm;
1350
1351         if (filename.empty()) {
1352                 // Launch a file browser
1353                 // FIXME UNICODE
1354                 string initpath = lyxrc.document_path;
1355
1356                 if (buffer_) {
1357                         string const trypath = buffer_->filePath();
1358                         // If directory is writeable, use this as default.
1359                         if (isDirWriteable(trypath))
1360                                 initpath = trypath;
1361                 }
1362
1363                 // FIXME UNICODE
1364                 FileDialog fileDlg(_("Select LyX document to insert"),
1365                         LFUN_FILE_INSERT,
1366                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1367                         make_pair(_("Examples|#E#e"), from_utf8(addPath(package().system_support(), "examples"))));
1368
1369                 FileDialog::Result result =
1370                         fileDlg.open(from_utf8(initpath),
1371                                      FileFilterList(_("LyX Documents (*.lyx)")),
1372                                      docstring());
1373
1374                 if (result.first == FileDialog::Later)
1375                         return;
1376
1377                 // FIXME UNICODE
1378                 filename = to_utf8(result.second);
1379
1380                 // check selected filename
1381                 if (filename.empty()) {
1382                         // emit message signal.
1383                         message(_("Canceled."));
1384                         return;
1385                 }
1386         }
1387
1388         // Get absolute path of file and add ".lyx"
1389         // to the filename if necessary
1390         filename = fileSearch(string(), filename, "lyx").absFilename();
1391
1392         docstring const disp_fn = makeDisplayPath(filename);
1393         // emit message signal.
1394         message(bformat(_("Inserting document %1$s..."), disp_fn));
1395
1396         docstring res;
1397         Buffer buf("", false);
1398         if (lyx::loadLyXFile(&buf, makeAbsPath(filename))) {
1399                 ErrorList & el = buffer_->errorList("Parse");
1400                 // Copy the inserted document error list into the current buffer one.
1401                 el = buf.errorList("Parse");
1402                 recordUndo(cursor_);
1403                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1404                                              buf.params().textclass, el);
1405                 res = _("Document %1$s inserted.");
1406         } else
1407                 res = _("Could not insert document %1$s");
1408
1409         // emit message signal.
1410         message(bformat(res, disp_fn));
1411         buffer_->errors("Parse");
1412         resize();
1413 }
1414
1415
1416 } // namespace lyx