src/BufferView.C

   1 /**
   2  * \file BufferView.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Alfredo Braunstein
   7  * \author Lars Gullik Bjønnes
   8  * \author John Levon
   9  * \author André Pönitz
  10  * \author Jürgen Vigna
  11  *
  12  * Full author contact details are available in file CREDITS.
  13  */
  14
  15 #include <config.h>
  16
  17 #include "BufferView.h"
  18
  19 #include "buffer.h"
  20 #include "buffer_funcs.h"
  21 #include "bufferlist.h"
  22 #include "bufferparams.h"
  23 #include "bufferview_funcs.h"
  24 #include "coordcache.h"
  25 #include "CutAndPaste.h"
  26 #include "debug.h"
  27 #include "dispatchresult.h"
  28 #include "errorlist.h"
  29 #include "factory.h"
  30 #include "FloatList.h"
  31 #include "funcrequest.h"
  32 #include "FuncStatus.h"
  33 #include "gettext.h"
  34 #include "intl.h"
  35 #include "insetiterator.h"
  36 #include "language.h"
  37 #include "LaTeXFeatures.h"
  38 #include "lyx_cb.h" // added for Dispatch functions
  39 #include "lyx_main.h"
  40 #include "lyxfind.h"
  41 #include "lyxfunc.h"
  42 #include "lyxlayout.h"
  43 #include "lyxtext.h"
  44 #include "lyxtextclass.h"
  45 #include "lyxrc.h"
  46 #include "session.h"
  47 #include "paragraph.h"
  48 #include "paragraph_funcs.h"
  49 #include "ParagraphParameters.h"
  50 #include "pariterator.h"
  51 #include "texrow.h"
  52 #include "toc.h"
  53 #include "undo.h"
  54 #include "vspace.h"
  55 #include "WordLangTuple.h"
  56 #include "metricsinfo.h"
  57
  58 #include "insets/insetbibtex.h"
  59 #include "insets/insetcommand.h" // ChangeRefs
  60 #include "insets/insetref.h"
  61 #include "insets/insettext.h"
  62
  63 #include "frontends/Alert.h"
  64 #include "frontends/FileDialog.h"
  65 #include "frontends/FontMetrics.h"
  66
  67 #include "graphics/Previews.h"
  68
  69 #include "support/convert.h"
  70 #include "support/filefilterlist.h"
  71 #include "support/filetools.h"
  72 #include "support/package.h"
  73 #include "support/types.h"
  74
  75 #include <boost/bind.hpp>
  76 #include <boost/current_function.hpp>
  77
  78 #include <functional>
  79 #include <vector>
  80
  81
  82 namespace lyx {
  83
  84 using support::addPath;
  85 using support::bformat;
  86 using support::FileFilterList;
  87 using support::FileName;
  88 using support::fileSearch;
  89 using support::isDirWriteable;
  90 using support::isFileReadable;
  91 using support::makeDisplayPath;
  92 using support::package;
  93
  94 using std::distance;
  95 using std::endl;
  96 using std::istringstream;
  97 using std::make_pair;
  98 using std::min;
  99 using std::max;
 100 using std::mem_fun_ref;
 101 using std::string;
 102 using std::vector;
 103
 104 namespace Alert = frontend::Alert;
 105
 106 namespace {
 107
 108 /// Return an inset of this class if it exists at the current cursor position
 109 template <class T>
 110 T * getInsetByCode(LCursor & cur, InsetBase::Code code)
 111 {
 112         T * inset = 0;
 113         DocIterator it = cur;
 114         if (it.nextInset() &&
 115             it.nextInset()->lyxCode() == code) {
 116                 inset = static_cast<T*>(it.nextInset());
 117         }
 118         return inset;
 119 }
 120
 121 } // anon namespace
 122
 123
 124 BufferView::BufferView()
 125         : width_(0), height_(0), buffer_(0), wh_(0),
 126           cursor_(*this),
 127           multiparsel_cache_(false), anchor_ref_(0), offset_ref_(0),
 128           intl_(new Intl), last_inset_(0)
 129 {
 130         xsel_cache_.set = false;
 131         intl_->initKeyMapper(lyxrc.use_kbmap);
 132 }
 133
 134
 135 BufferView::~BufferView()
 136 {
 137 }
 138
 139
 140 Buffer * BufferView::buffer() const
 141 {
 142         return buffer_;
 143 }
 144
 145
 146 void BufferView::setBuffer(Buffer * b)
 147 {
 148         LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
 149                             << "[ b = " << b << "]" << endl;
 150
 151         if (buffer_) {
 152                 // Save the actual cursor position and anchor inside the
 153                 // buffer so that it can be restored in case we rechange
 154                 // to this buffer later on.
 155                 buffer_->saveCursor(cursor_.selectionBegin(),
 156                                     cursor_.selectionEnd());
 157                 // update bookmark pit of the current buffer before switch
 158                 for (size_t i = 0; i < LyX::ref().session().bookmarks().size(); ++i) {
 159                         BookmarksSection::Bookmark const & bm = LyX::ref().session().bookmarks().bookmark(i);
 160                         if (buffer()->fileName() != bm.filename.absFilename())
 161                                 continue;
 162                         // if par_id or pit has been changed, reset par_pit and par_id
 163                         // see http://bugzilla.lyx.org/show_bug.cgi?id=3092
 164                         pit_type new_pit;
 165                         int new_id;
 166                         boost::tie(new_pit, new_id) = moveToPosition(bm.par_pit, bm.par_id, bm.par_pos);
 167                         if (bm.par_pit != new_pit || bm.par_id != new_id)
 168                                 const_cast<BookmarksSection::Bookmark &>(bm).setPos(new_pit, new_id);
 169                 }
 170                 // current buffer is going to be switched-off, save cursor pos
 171                 LyX::ref().session().lastFilePos().save(FileName(buffer_->fileName()),
 172                         boost::tie(cursor_.pit(), cursor_.pos()) );
 173         }
 174
 175         // If we're quitting lyx, don't bother updating stuff
 176         if (quitting) {
 177                 buffer_ = 0;
 178                 return;
 179         }
 180
 181         // If we are closing current buffer, switch to the first in
 182         // buffer list.
 183         if (!b) {
 184                 LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
 185                                     << " No Buffer!" << endl;
 186                 // We are closing the buffer, use the first buffer as current
 187                 buffer_ = theBufferList().first();
 188         } else {
 189                 // Set current buffer
 190                 buffer_ = b;
 191         }
 192
 193         // Reset old cursor
 194         cursor_ = LCursor(*this);
 195         anchor_ref_ = 0;
 196         offset_ref_ = 0;
 197
 198         if (buffer_) {
 199                 LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
 200                                     << "Buffer addr: " << buffer_ << endl;
 201                 cursor_.push(buffer_->inset());
 202                 cursor_.resetAnchor();
 203                 buffer_->text().setCurrentFont(cursor_);
 204                 if (buffer_->getCursor().size() > 0 &&
 205                     buffer_->getAnchor().size() > 0)
 206                 {
 207                         cursor_.setCursor(buffer_->getAnchor().asDocIterator(&(buffer_->inset())));
 208                         cursor_.resetAnchor();
 209                         cursor_.setCursor(buffer_->getCursor().asDocIterator(&(buffer_->inset())));
 210                         cursor_.setSelection();
 211                         // do not set selection to the new buffer because we
 212                         // only paste recent selection.
 213                 }
 214         }
 215
 216         if (buffer_)
 217                 updateMetrics(false);
 218
 219         if (buffer_ && graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 220                 graphics::Previews::get().generateBufferPreviews(*buffer_);
 221 }
 222
 223
 224 bool BufferView::loadLyXFile(FileName const & filename, bool tolastfiles)
 225 {
 226         // File already open?
 227         if (theBufferList().exists(filename.absFilename())) {
 228                 docstring const file = makeDisplayPath(filename.absFilename(), 20);
 229                 docstring text = bformat(_("The document %1$s is already "
 230                                                      "loaded.\n\nDo you want to revert "
 231                                                      "to the saved version?"), file);
 232                 int const ret = Alert::prompt(_("Revert to saved document?"),
 233                         text, 0, 1,  _("&Revert"), _("&Switch to document"));
 234
 235                 if (ret != 0) {
 236                         setBuffer(theBufferList().getBuffer(filename.absFilename()));
 237                         return true;
 238                 }
 239                 // FIXME: should be LFUN_REVERT
 240                 if (!theBufferList().close(theBufferList().getBuffer(filename.absFilename()), false))
 241                         return false;
 242                 // Fall through to new load. (Asger)
 243                 buffer_ = 0;
 244         }
 245
 246         Buffer * b = 0;
 247
 248         if (isFileReadable(filename)) {
 249                 b = theBufferList().newBuffer(filename.absFilename());
 250                 if (!lyx::loadLyXFile(b, filename)) {
 251                         theBufferList().release(b);
 252                         return false;
 253                 }
 254         } else {
 255                 docstring text = bformat(_("The document %1$s does not yet "
 256                                                      "exist.\n\nDo you want to create "
 257                                                      "a new document?"), from_utf8(filename.absFilename()));
 258                 int const ret = Alert::prompt(_("Create new document?"),
 259                          text, 0, 1, _("&Create"), _("Cancel"));
 260
 261                 if (ret == 0) {
 262                         b = newFile(filename.absFilename(), string(), true);
 263                         if (!b)
 264                                 return false;
 265                 } else
 266                         return false;
 267         }
 268
 269         setBuffer(b);
 270         // Send the "errors" signal in case of parsing errors
 271         b->errors("Parse");
 272
 273         // Update the labels and section numbering.
 274         updateLabels(*buffer_);
 275         // scroll to the position when the file was last closed
 276         if (lyxrc.use_lastfilepos) {
 277                 pit_type pit;
 278                 pos_type pos;
 279                 boost::tie(pit, pos) = LyX::ref().session().lastFilePos().load(filename);
 280                 // if successfully move to pit (returned par_id is not zero), update metrics and reset font
 281                 if (moveToPosition(pit, 0, pos).get<1>()) {
 282                         if (fitCursor())
 283                                 updateMetrics(false);
 284                         buffer_->text().setCurrentFont(cursor_);
 285                 }
 286         }
 287
 288         if (tolastfiles)
 289                 LyX::ref().session().lastFiles().add(FileName(b->fileName()));
 290
 291         return true;
 292 }
 293
 294
 295 void BufferView::resize()
 296 {
 297         if (!buffer_)
 298                 return;
 299
 300         LYXERR(Debug::DEBUG) << BOOST_CURRENT_FUNCTION << endl;
 301
 302         updateMetrics(false);
 303         switchKeyMap();
 304 }
 305
 306
 307 bool BufferView::fitCursor()
 308 {
 309         if (bv_funcs::status(this, cursor_) == bv_funcs::CUR_INSIDE) {
 310                 frontend::FontMetrics const & fm =
 311                         theFontMetrics(cursor_.getFont());
 312                 int const asc = fm.maxAscent();
 313                 int const des = fm.maxDescent();
 314                 Point const p = bv_funcs::getPos(*this, cursor_, cursor_.boundary());
 315                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 316                         return false;
 317         }
 318         center();
 319         return true;
 320 }
 321
 322
 323 bool BufferView::multiParSel()
 324 {
 325         if (!cursor_.selection())
 326                 return false;
 327         bool ret = multiparsel_cache_;
 328         multiparsel_cache_ = cursor_.selBegin().pit() != cursor_.selEnd().pit();
 329         // Either this, or previous selection spans paragraphs
 330         return ret || multiparsel_cache_;
 331 }
 332
 333
 334 bool BufferView::update(Update::flags flags)
 335 {
 336         // last_inset_ points to the last visited inset. This pointer may become
 337         // invalid because of keyboard editing. Since all such operations
 338         // causes screen update(), I reset last_inset_ to avoid such a problem.
 339         last_inset_ = 0;
 340         // This is close to a hot-path.
 341         LYXERR(Debug::DEBUG)
 342                 << BOOST_CURRENT_FUNCTION
 343                 << "[fitcursor = " << (flags & Update::FitCursor)
 344                 << ", forceupdate = " << (flags & Update::Force)
 345                 << ", singlepar = " << (flags & Update::SinglePar)
 346                 << "]  buffer: " << buffer_ << endl;
 347
 348         // Check needed to survive LyX startup
 349         if (!buffer_)
 350                 return false;
 351
 352         LYXERR(Debug::WORKAREA) << "BufferView::update" << std::endl;
 353
 354         // Update macro store
 355         buffer_->buildMacros();
 356
 357         // Now do the first drawing step if needed. This consists on updating
 358         // the CoordCache in updateMetrics().
 359         // The second drawing step is done in WorkArea::redraw() if needed.
 360
 361         // Case when no explicit update is requested.
 362         if (!flags) {
 363                 // no need to redraw anything.
 364                 metrics_info_.update_strategy = NoScreenUpdate;
 365                 return false;
 366         }
 367
 368         if (flags == Update::Decoration) {
 369                 metrics_info_.update_strategy = DecorationUpdate;
 370                 return true;
 371         }
 372
 373         if (flags == Update::FitCursor
 374                 || flags == (Update::Decoration | Update::FitCursor)) {
 375                 bool const fit_cursor = fitCursor();
 376                 // tell the frontend to update the screen if needed.
 377                 if (fit_cursor) {
 378                         updateMetrics(false);
 379                         return true;
 380                 }
 381                 if (flags & Update::Decoration) {
 382                         metrics_info_.update_strategy = DecorationUpdate;
 383                         return true;
 384                 }
 385                 // no screen update is needed.
 386                 metrics_info_.update_strategy = NoScreenUpdate;
 387                 return false;
 388         }
 389
 390         bool full_metrics = flags & Update::Force;
 391         if (flags & Update::MultiParSel)
 392                 full_metrics |= multiParSel();
 393
 394         bool const single_par = !full_metrics;
 395         updateMetrics(single_par);
 396
 397         if (flags & Update::FitCursor && fitCursor())
 398                 updateMetrics(false);
 399
 400         // tell the frontend to update the screen.
 401         return true;
 402 }
 403
 404
 405 void BufferView::updateScrollbar()
 406 {
 407         if (!buffer_) {
 408                 LYXERR(Debug::DEBUG) << BOOST_CURRENT_FUNCTION
 409                                      << " no text in updateScrollbar" << endl;
 410                 scrollbarParameters_.reset();
 411                 return;
 412         }
 413
 414         LyXText & t = buffer_->text();
 415         TextMetrics & tm = text_metrics_[&t];
 416
 417         int const parsize = int(t.paragraphs().size() - 1);
 418         if (anchor_ref_ >  parsize)  {
 419                 anchor_ref_ = parsize;
 420                 offset_ref_ = 0;
 421         }
 422
 423         LYXERR(Debug::GUI)
 424                 << BOOST_CURRENT_FUNCTION
 425                 << " Updating scrollbar: height: " << t.paragraphs().size()
 426                 << " curr par: " << cursor_.bottom().pit()
 427                 << " default height " << defaultRowHeight() << endl;
 428
 429         // It would be better to fix the scrollbar to understand
 430         // values in [0..1] and divide everything by wh
 431
 432         // estimated average paragraph height:
 433         if (wh_ == 0)
 434                 wh_ = height_ / 4;
 435
 436         int h = tm.parMetrics(anchor_ref_).height();
 437
 438         // Normalize anchor/offset (MV):
 439         while (offset_ref_ > h && anchor_ref_ < parsize) {
 440                 anchor_ref_++;
 441                 offset_ref_ -= h;
 442                 h = tm.parMetrics(anchor_ref_).height();
 443         }
 444         // Look at paragraph heights on-screen
 445         int sumh = 0;
 446         int nh = 0;
 447         for (pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 448                 if (sumh > height_)
 449                         break;
 450                 int const h2 = tm.parMetrics(pit).height();
 451                 sumh += h2;
 452                 nh++;
 453         }
 454
 455         BOOST_ASSERT(nh);
 456         int const hav = sumh / nh;
 457         // More realistic average paragraph height
 458         if (hav > wh_)
 459                 wh_ = hav;
 460
 461         BOOST_ASSERT(h);
 462         scrollbarParameters_.height = (parsize + 1) * wh_;
 463         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 464         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 465 }
 466
 467
 468 ScrollbarParameters const & BufferView::scrollbarParameters() const
 469 {
 470         return scrollbarParameters_;
 471 }
 472
 473
 474 void BufferView::scrollDocView(int value)
 475 {
 476         LYXERR(Debug::GUI) << BOOST_CURRENT_FUNCTION
 477                            << "[ value = " << value << "]" << endl;
 478
 479         if (!buffer_)
 480                 return;
 481
 482         LyXText & t = buffer_->text();
 483         TextMetrics & tm = text_metrics_[&t];
 484
 485         float const bar = value / float(wh_ * t.paragraphs().size());
 486
 487         anchor_ref_ = int(bar * t.paragraphs().size());
 488         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 489                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 490
 491         tm.redoParagraph(anchor_ref_);
 492         int const h = tm.parMetrics(anchor_ref_).height();
 493         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 494         updateMetrics(false);
 495 }
 496
 497
 498 void BufferView::setCursorFromScrollbar()
 499 {
 500         if (!buffer_)
 501                 return;
 502
 503         LyXText & t = buffer_->text();
 504
 505         int const height = 2 * defaultRowHeight();
 506         int const first = height;
 507         int const last = height_ - height;
 508         LCursor & cur = cursor_;
 509
 510         bv_funcs::CurStatus st = bv_funcs::status(this, cur);
 511
 512         switch (st) {
 513         case bv_funcs::CUR_ABOVE:
 514                 // We reset the cursor because bv_funcs::status() does not
 515                 // work when the cursor is within mathed.
 516                 cur.reset(buffer_->inset());
 517                 t.setCursorFromCoordinates(cur, 0, first);
 518                 cur.clearSelection();
 519                 break;
 520         case bv_funcs::CUR_BELOW:
 521                 // We reset the cursor because bv_funcs::status() does not
 522                 // work when the cursor is within mathed.
 523                 cur.reset(buffer_->inset());
 524                 t.setCursorFromCoordinates(cur, 0, last);
 525                 cur.clearSelection();
 526                 break;
 527         case bv_funcs::CUR_INSIDE:
 528                 int const y = bv_funcs::getPos(*this, cur, cur.boundary()).y_;
 529                 int const newy = min(last, max(y, first));
 530                 if (y != newy) {
 531                         cur.reset(buffer_->inset());
 532                         t.setCursorFromCoordinates(cur, 0, newy);
 533                 }
 534         }
 535 }
 536
 537
 538 Change const BufferView::getCurrentChange() const
 539 {
 540         if (!cursor_.selection())
 541                 return Change(Change::UNCHANGED);
 542
 543         DocIterator dit = cursor_.selectionBegin();
 544         return dit.paragraph().lookupChange(dit.pos());
 545 }
 546
 547
 548 void BufferView::saveBookmark(unsigned int idx)
 549 {
 550         LyX::ref().session().bookmarks().save(
 551                 FileName(buffer_->fileName()),
 552                 cursor_.pit(),
 553                 cursor_.paragraph().id(),
 554                 cursor_.pos(),
 555                 idx
 556         );
 557         if (idx)
 558                 // emit message signal.
 559                 message(_("Save bookmark"));
 560 }
 561
 562
 563 boost::tuple<pit_type, int> BufferView::moveToPosition(pit_type par_pit, int par_id, pos_type par_pos)
 564 {
 565         cursor_.clearSelection();
 566
 567         // if a valid par_id is given, try it first
 568         if (par_id > 0) {
 569                 ParIterator par = buffer_->getParFromID(par_id);
 570                 if (par != buffer_->par_iterator_end()) {
 571                         setCursor(makeDocIterator(par, min(par->size(), par_pos)));
 572                         return boost::make_tuple(cursor_.pit(), par_id);
 573                 }
 574         }
 575         // if par_id == 0, or searching through par_id failed
 576         if (static_cast<size_t>(par_pit) < buffer_->paragraphs().size()) {
 577                 ParIterator it = buffer_->par_iterator_begin();
 578                 ParIterator const end = buffer_->par_iterator_end();
 579                 for (; it != end; ++it)
 580                         if (it.pit() == par_pit) {
 581                                 // restored pos may be bigger than it->size
 582                                 setCursor(makeDocIterator(it, min(par_pos, it->size())));
 583                                 return boost::make_tuple(par_pit, it->id());
 584                         }
 585         }
 586         // both methods fail
 587         return boost::make_tuple(pit_type(0), 0);
 588 }
 589
 590
 591 void BufferView::switchKeyMap()
 592 {
 593         if (!lyxrc.rtl_support)
 594                 return;
 595
 596         if (cursor_.innerText()->real_current_font.isRightToLeft()) {
 597                 if (intl_->keymap == Intl::PRIMARY)
 598                         intl_->keyMapSec();
 599         } else {
 600                 if (intl_->keymap == Intl::SECONDARY)
 601                         intl_->keyMapPrim();
 602         }
 603 }
 604
 605
 606 int BufferView::workWidth() const
 607 {
 608         return width_;
 609 }
 610
 611
 612 void BufferView::center()
 613 {
 614         CursorSlice & bot = cursor_.bottom();
 615         TextMetrics & tm = text_metrics_[bot.text()];
 616         pit_type const pit = bot.pit();
 617         tm.redoParagraph(pit);
 618         ParagraphMetrics const & pm = tm.parMetrics(pit);
 619         anchor_ref_ = pit;
 620         offset_ref_ = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary()).y_
 621                 + pm.ascent() - height_ / 2;
 622 }
 623
 624
 625 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 626 {
 627         FuncStatus flag;
 628
 629         switch (cmd.action) {
 630
 631         case LFUN_UNDO:
 632                 flag.enabled(!buffer_->undostack().empty());
 633                 break;
 634         case LFUN_REDO:
 635                 flag.enabled(!buffer_->redostack().empty());
 636                 break;
 637         case LFUN_FILE_INSERT:
 638         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 639         case LFUN_FILE_INSERT_PLAINTEXT:
 640         case LFUN_BOOKMARK_SAVE:
 641                 // FIXME: Actually, these LFUNS should be moved to LyXText
 642                 flag.enabled(cursor_.inTexted());
 643                 break;
 644         case LFUN_FONT_STATE:
 645         case LFUN_LABEL_INSERT:
 646         case LFUN_PARAGRAPH_GOTO:
 647         // FIXME handle non-trivially
 648         case LFUN_OUTLINE_UP:
 649         case LFUN_OUTLINE_DOWN:
 650         case LFUN_OUTLINE_IN:
 651         case LFUN_OUTLINE_OUT:
 652         case LFUN_NOTE_NEXT:
 653         case LFUN_REFERENCE_NEXT:
 654         case LFUN_WORD_FIND:
 655         case LFUN_WORD_REPLACE:
 656         case LFUN_MARK_OFF:
 657         case LFUN_MARK_ON:
 658         case LFUN_MARK_TOGGLE:
 659         case LFUN_SCREEN_RECENTER:
 660         case LFUN_BIBTEX_DATABASE_ADD:
 661         case LFUN_BIBTEX_DATABASE_DEL:
 662         case LFUN_WORDS_COUNT:
 663         case LFUN_NEXT_INSET_TOGGLE:
 664                 flag.enabled(true);
 665                 break;
 666
 667         case LFUN_LABEL_GOTO: {
 668                 flag.enabled(!cmd.argument().empty()
 669                     || getInsetByCode<InsetRef>(cursor_, InsetBase::REF_CODE));
 670                 break;
 671         }
 672
 673         case LFUN_CHANGES_TRACK:
 674                 flag.enabled(true);
 675                 flag.setOnOff(buffer_->params().trackChanges);
 676                 break;
 677
 678         case LFUN_CHANGES_OUTPUT:
 679                 flag.enabled(buffer_ && LaTeXFeatures::isAvailable("dvipost"));
 680                 flag.setOnOff(buffer_->params().outputChanges);
 681                 break;
 682
 683         case LFUN_CHANGES_MERGE:
 684         case LFUN_CHANGE_NEXT:
 685         case LFUN_ALL_CHANGES_ACCEPT:
 686         case LFUN_ALL_CHANGES_REJECT:
 687                 // TODO: context-sensitive enabling of LFUNs
 688                 // In principle, these command should only be enabled if there
 689                 // is a change in the document. However, without proper
 690                 // optimizations, this will inevitably result in poor performance.
 691                 flag.enabled(buffer_);
 692                 break;
 693
 694         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 695                 flag.setOnOff(buffer_->params().compressed);
 696                 break;
 697         }
 698
 699         default:
 700                 flag.enabled(false);
 701         }
 702
 703         return flag;
 704 }
 705
 706
 707 Update::flags BufferView::dispatch(FuncRequest const & cmd)
 708 {
 709         //lyxerr << BOOST_CURRENT_FUNCTION
 710         //       << [ cmd = " << cmd << "]" << endl;
 711
 712         // Make sure that the cached BufferView is correct.
 713         LYXERR(Debug::ACTION) << BOOST_CURRENT_FUNCTION
 714                 << " action[" << cmd.action << ']'
 715                 << " arg[" << to_utf8(cmd.argument()) << ']'
 716                 << " x[" << cmd.x << ']'
 717                 << " y[" << cmd.y << ']'
 718                 << " button[" << cmd.button() << ']'
 719                 << endl;
 720
 721         // FIXME: this should not be possible.
 722         if (!buffer_)
 723                 return Update::None;
 724
 725         LCursor & cur = cursor_;
 726         // Default Update flags.
 727         Update::flags updateFlags = Update::Force | Update::FitCursor;
 728
 729         switch (cmd.action) {
 730
 731         case LFUN_UNDO:
 732                 cur.message(_("Undo"));
 733                 cur.clearSelection();
 734                 if (!textUndo(*this)) {
 735                         cur.message(_("No further undo information"));
 736                         updateFlags = Update::None;
 737                 }
 738                 switchKeyMap();
 739                 break;
 740
 741         case LFUN_REDO:
 742                 cur.message(_("Redo"));
 743                 cur.clearSelection();
 744                 if (!textRedo(*this)) {
 745                         cur.message(_("No further redo information"));
 746                         updateFlags = Update::None;
 747                 }
 748                 switchKeyMap();
 749                 break;
 750
 751         case LFUN_FILE_INSERT:
 752                 // FIXME UNICODE
 753                 menuInsertLyXFile(to_utf8(cmd.argument()));
 754                 break;
 755
 756         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 757                 // FIXME UNICODE
 758                 insertPlaintextFile(this, to_utf8(cmd.argument()), true);
 759                 break;
 760
 761         case LFUN_FILE_INSERT_PLAINTEXT:
 762                 // FIXME UNICODE
 763                 insertPlaintextFile(this, to_utf8(cmd.argument()), false);
 764                 break;
 765
 766         case LFUN_FONT_STATE:
 767                 cur.message(cur.currentState());
 768                 break;
 769
 770         case LFUN_BOOKMARK_SAVE:
 771                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 772                 break;
 773
 774         case LFUN_LABEL_GOTO: {
 775                 docstring label = cmd.argument();
 776                 if (label.empty()) {
 777                         InsetRef * inset =
 778                                 getInsetByCode<InsetRef>(cursor_,
 779                                                          InsetBase::REF_CODE);
 780                         if (inset) {
 781                                 label = inset->getParam("reference");
 782                                 // persistent=false: use temp_bookmark
 783                                 saveBookmark(0);
 784                         }
 785                 }
 786
 787                 if (!label.empty())
 788                         gotoLabel(label);
 789                 break;
 790         }
 791
 792         case LFUN_PARAGRAPH_GOTO: {
 793                 int const id = convert<int>(to_utf8(cmd.argument()));
 794                 int i = 0;
 795                 for (Buffer * b = buffer_; i == 0 || b != buffer_; b = theBufferList().next(b)) {
 796                         ParIterator par = b->getParFromID(id);
 797                         if (par == b->par_iterator_end()) {
 798                                 LYXERR(Debug::INFO)
 799                                         << "No matching paragraph found! ["
 800                                         << id << "]." << endl;
 801                         } else {
 802                                 LYXERR(Debug::INFO)
 803                                         << "Paragraph " << par->id()
 804                                         << " found in buffer `"
 805                                         << b->fileName() << "'." << endl;
 806
 807                                 if (b == buffer_) {
 808                                         // Set the cursor
 809                                         setCursor(makeDocIterator(par, 0));
 810                                         switchKeyMap();
 811                                 } else {
 812                                         // Switch to other buffer view and resend cmd
 813                                         theLyXFunc().dispatch(FuncRequest(
 814                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 815                                         theLyXFunc().dispatch(cmd);
 816                                         updateFlags = Update::None;
 817                                 }
 818                                 break;
 819                         }
 820                         ++i;
 821                 }
 822                 break;
 823         }
 824
 825         case LFUN_OUTLINE_UP:
 826                 toc::outline(toc::Up, cursor_);
 827                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 828                 updateLabels(*buffer_);
 829                 break;
 830         case LFUN_OUTLINE_DOWN:
 831                 toc::outline(toc::Down, cursor_);
 832                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 833                 updateLabels(*buffer_);
 834                 break;
 835         case LFUN_OUTLINE_IN:
 836                 toc::outline(toc::In, cursor_);
 837                 updateLabels(*buffer_);
 838                 break;
 839         case LFUN_OUTLINE_OUT:
 840                 toc::outline(toc::Out, cursor_);
 841                 updateLabels(*buffer_);
 842                 break;
 843
 844         case LFUN_NOTE_NEXT:
 845                 bv_funcs::gotoInset(this, InsetBase::NOTE_CODE, false);
 846                 break;
 847
 848         case LFUN_REFERENCE_NEXT: {
 849                 vector<InsetBase_code> tmp;
 850                 tmp.push_back(InsetBase::LABEL_CODE);
 851                 tmp.push_back(InsetBase::REF_CODE);
 852                 bv_funcs::gotoInset(this, tmp, true);
 853                 break;
 854         }
 855
 856         case LFUN_CHANGES_TRACK:
 857                 buffer_->params().trackChanges = !buffer_->params().trackChanges;
 858                 break;
 859
 860         case LFUN_CHANGES_OUTPUT:
 861                 buffer_->params().outputChanges = !buffer_->params().outputChanges;
 862                 break;
 863
 864         case LFUN_CHANGE_NEXT:
 865                 findNextChange(this);
 866                 break;
 867
 868         case LFUN_CHANGES_MERGE:
 869                 if (findNextChange(this))
 870                         showDialog("changes");
 871                 break;
 872
 873         case LFUN_ALL_CHANGES_ACCEPT:
 874                 // select complete document
 875                 cursor_.reset(buffer_->inset());
 876                 cursor_.selHandle(true);
 877                 buffer_->text().cursorBottom(cursor_);
 878                 // accept everything in a single step to support atomic undo
 879                 buffer_->text().acceptOrRejectChanges(cursor_, LyXText::ACCEPT);
 880                 break;
 881
 882         case LFUN_ALL_CHANGES_REJECT:
 883                 // select complete document
 884                 cursor_.reset(buffer_->inset());
 885                 cursor_.selHandle(true);
 886                 buffer_->text().cursorBottom(cursor_);
 887                 // reject everything in a single step to support atomic undo
 888                 // Note: reject does not work recursively; the user may have to repeat the operation
 889                 buffer_->text().acceptOrRejectChanges(cursor_, LyXText::REJECT);
 890                 break;
 891
 892         case LFUN_WORD_FIND:
 893                 find(this, cmd);
 894                 break;
 895
 896         case LFUN_WORD_REPLACE:
 897                 replace(this, cmd);
 898                 break;
 899
 900         case LFUN_MARK_OFF:
 901                 cur.clearSelection();
 902                 cur.resetAnchor();
 903                 cur.message(from_utf8(N_("Mark off")));
 904                 break;
 905
 906         case LFUN_MARK_ON:
 907                 cur.clearSelection();
 908                 cur.mark() = true;
 909                 cur.resetAnchor();
 910                 cur.message(from_utf8(N_("Mark on")));
 911                 break;
 912
 913         case LFUN_MARK_TOGGLE:
 914                 cur.clearSelection();
 915                 if (cur.mark()) {
 916                         cur.mark() = false;
 917                         cur.message(from_utf8(N_("Mark removed")));
 918                 } else {
 919                         cur.mark() = true;
 920                         cur.message(from_utf8(N_("Mark set")));
 921                 }
 922                 cur.resetAnchor();
 923                 break;
 924
 925         case LFUN_SCREEN_RECENTER:
 926                 center();
 927                 break;
 928
 929         case LFUN_BIBTEX_DATABASE_ADD: {
 930                 LCursor tmpcur = cursor_;
 931                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 932                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 933                                                 InsetBase::BIBTEX_CODE);
 934                 if (inset) {
 935                         if (inset->addDatabase(to_utf8(cmd.argument())))
 936                                 buffer_->updateBibfilesCache();
 937                 }
 938                 break;
 939         }
 940
 941         case LFUN_BIBTEX_DATABASE_DEL: {
 942                 LCursor tmpcur = cursor_;
 943                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
 944                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 945                                                 InsetBase::BIBTEX_CODE);
 946                 if (inset) {
 947                         if (inset->delDatabase(to_utf8(cmd.argument())))
 948                                 buffer_->updateBibfilesCache();
 949                 }
 950                 break;
 951         }
 952
 953         case LFUN_WORDS_COUNT: {
 954                 DocIterator from, to;
 955                 if (cur.selection()) {
 956                         from = cur.selectionBegin();
 957                         to = cur.selectionEnd();
 958                 } else {
 959                         from = doc_iterator_begin(buffer_->inset());
 960                         to = doc_iterator_end(buffer_->inset());
 961                 }
 962                 int const count = countWords(from, to);
 963                 docstring message;
 964                 if (count != 1) {
 965                         if (cur.selection())
 966                                 message = bformat(_("%1$d words in selection."),
 967                                           count);
 968                                 else
 969                                         message = bformat(_("%1$d words in document."),
 970                                                           count);
 971                 }
 972                 else {
 973                         if (cur.selection())
 974                                 message = _("One word in selection.");
 975                         else
 976                                 message = _("One word in document.");
 977                 }
 978
 979                 Alert::information(_("Count words"), message);
 980         }
 981                 break;
 982
 983         case LFUN_BUFFER_TOGGLE_COMPRESSION:
 984                 // turn compression on/off
 985                 buffer_->params().compressed = !buffer_->params().compressed;
 986                 break;
 987
 988         case LFUN_NEXT_INSET_TOGGLE: {
 989                 // this is the real function we want to invoke
 990                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
 991                 // if there is an inset at cursor, see whether it
 992                 // wants to toggle.
 993                 InsetBase * inset = cur.nextInset();
 994                 if (inset && inset->isActive()) {
 995                         LCursor tmpcur = cur;
 996                         tmpcur.pushLeft(*inset);
 997                         inset->dispatch(tmpcur, tmpcmd);
 998                         if (tmpcur.result().dispatched()) {
 999                                 cur.dispatched();
1000                         }
1001                 }
1002                 // if it did not work, try the underlying inset.
1003                 if (!cur.result().dispatched())
1004                         cur.dispatch(tmpcmd);
1005
1006                 if (cur.result().dispatched())
1007                         cur.clearSelection();
1008
1009                 break;
1010         }
1011
1012         default:
1013                 updateFlags = Update::None;
1014         }
1015
1016         return updateFlags;
1017 }
1018
1019
1020 docstring const BufferView::requestSelection()
1021 {
1022         if (!buffer_)
1023                 return docstring();
1024
1025         LCursor & cur = cursor_;
1026
1027         if (!cur.selection()) {
1028                 xsel_cache_.set = false;
1029                 return docstring();
1030         }
1031
1032         if (!xsel_cache_.set ||
1033             cur.top() != xsel_cache_.cursor ||
1034             cur.anchor_.top() != xsel_cache_.anchor)
1035         {
1036                 xsel_cache_.cursor = cur.top();
1037                 xsel_cache_.anchor = cur.anchor_.top();
1038                 xsel_cache_.set = cur.selection();
1039                 return cur.selectionAsString(false);
1040         }
1041         return docstring();
1042 }
1043
1044
1045 void BufferView::clearSelection()
1046 {
1047         if (buffer_) {
1048                 cursor_.clearSelection();
1049                 // Clear the selection buffer. Otherwise a subsequent
1050                 // middle-mouse-button paste would use the selection buffer,
1051                 // not the more current external selection.
1052                 cap::clearSelection();
1053                 xsel_cache_.set = false;
1054                 // The buffer did not really change, but this causes the
1055                 // redraw we need because we cleared the selection above.
1056                 buffer_->changed();
1057         }
1058 }
1059
1060
1061 void BufferView::workAreaResize(int width, int height)
1062 {
1063         // Update from work area
1064         width_ = width;
1065         height_ = height;
1066
1067         // The complete text metrics will be redone.
1068         text_metrics_.clear();
1069
1070         if (buffer_)
1071                 resize();
1072 }
1073
1074
1075 InsetBase const * BufferView::getCoveringInset(LyXText const & text, int x, int y)
1076 {
1077         pit_type pit = text.getPitNearY(*this, y);
1078         BOOST_ASSERT(pit != -1);
1079         Paragraph const & par = text.getPar(pit);
1080
1081         LYXERR(Debug::DEBUG)
1082                 << BOOST_CURRENT_FUNCTION
1083                 << ": x: " << x
1084                 << " y: " << y
1085                 << "  pit: " << pit
1086                 << endl;
1087         InsetList::const_iterator iit = par.insetlist.begin();
1088         InsetList::const_iterator iend = par.insetlist.end();
1089         for (; iit != iend; ++iit) {
1090                 InsetBase * const inset = iit->inset;
1091                 if (inset->covers(*this, x, y)) {
1092                         if (!inset->descendable())
1093                                 // No need to go further down if the inset is not
1094                                 // descendable.
1095                                 return inset;
1096
1097                         size_t cell_number = inset->nargs();
1098                         // Check all the inner cell.
1099                         for (size_t i = 0; i != cell_number; ++i) {
1100                                 LyXText const * inner_text = inset->getText(i);
1101                                 if (inner_text) {
1102                                         // Try deeper.
1103                                         InsetBase const * inset_deeper =
1104                                                 getCoveringInset(*inner_text, x, y);
1105                                         if (inset_deeper)
1106                                                 return inset_deeper;
1107                                 }
1108                         }
1109
1110                         LYXERR(Debug::DEBUG)
1111                                 << BOOST_CURRENT_FUNCTION
1112                                 << ": Hit inset: " << inset << endl;
1113                         return inset;
1114                 }
1115         }
1116         LYXERR(Debug::DEBUG)
1117                 << BOOST_CURRENT_FUNCTION
1118                 << ": No inset hit. " << endl;
1119         return 0;
1120 }
1121
1122
1123 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
1124 {
1125         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1126
1127         // This is only called for mouse related events including
1128         // LFUN_FILE_OPEN generated by drag-and-drop.
1129         FuncRequest cmd = cmd0;
1130
1131         // E.g. Qt mouse press when no buffer
1132         if (!buffer_)
1133                 return false;
1134
1135         LCursor cur(*this);
1136         cur.push(buffer_->inset());
1137         cur.selection() = cursor_.selection();
1138
1139         // Either the inset under the cursor or the
1140         // surrounding LyXText will handle this event.
1141
1142         // make sure we stay within the screen...
1143         cmd.y = min(max(cmd.y, -1), height_);
1144
1145         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1146
1147                 // Get inset under mouse, if there is one.
1148                 InsetBase const * covering_inset =
1149                         getCoveringInset(buffer_->text(), cmd.x, cmd.y);
1150                 if (covering_inset == last_inset_)
1151                         // Same inset, no need to do anything...
1152                         return false;
1153
1154                 bool need_redraw = false;
1155                 // const_cast because of setMouseHover().
1156                 InsetBase * inset = const_cast<InsetBase *>(covering_inset);
1157                 if (last_inset_)
1158                         // Remove the hint on the last hovered inset (if any).
1159                         need_redraw |= last_inset_->setMouseHover(false);
1160                 if (inset)
1161                         // Highlighted the newly hovered inset (if any).
1162                         need_redraw |= inset->setMouseHover(true);
1163                 last_inset_ = inset;
1164
1165                 // if last metrics update was in singlepar mode, WorkArea::redraw() will
1166                 // not expose the button for redraw. We adjust here the metrics dimension
1167                 // to enable a full redraw.
1168                 // FIXME: It is possible to redraw only the area around the button!
1169                 if (need_redraw
1170                         && metrics_info_.update_strategy == SingleParUpdate) {
1171                         // FIXME: It should be possible to redraw only the area around
1172                         // the button by doing this:
1173                         //
1174                         //metrics_info_.singlepar = false;
1175                         //metrics_info_.y1 = ymin of button;
1176                         //metrics_info_.y2 = ymax of button;
1177                         //
1178                         // Unfortunately, rowpainter.C:paintText() does not distinguish
1179                         // between background updates and text updates. So we use the hammer
1180                         // solution for now. We could also avoid the updateMetrics() below
1181                         // by using the first and last pit of the CoordCache. Have a look
1182                         // at LyXText::getPitNearY() to see what I mean.
1183                         //
1184                         //metrics_info_.pit1 = first pit of CoordCache;
1185                         //metrics_info_.pit2 = last pit of CoordCache;
1186                         //metrics_info_.singlepar = false;
1187                         //metrics_info_.y1 = 0;
1188                         //metrics_info_.y2 = height_;
1189                         //
1190                         updateMetrics(false);
1191                 }
1192
1193                 // This event (moving without mouse click) is not passed further.
1194                 // This should be changed if it is further utilized.
1195                 return need_redraw;
1196         }
1197
1198         // Build temporary cursor.
1199         InsetBase * inset = buffer_->text().editXY(cur, cmd.x, cmd.y);
1200
1201         // Put anchor at the same position.
1202         cur.resetAnchor();
1203
1204         // Try to dispatch to an non-editable inset near this position
1205         // via the temp cursor. If the inset wishes to change the real
1206         // cursor it has to do so explicitly by using
1207         //  cur.bv().cursor() = cur;  (or similar)
1208         if (inset) {
1209                 inset->dispatch(cur, cmd);
1210         }
1211
1212         // Now dispatch to the temporary cursor. If the real cursor should
1213         // be modified, the inset's dispatch has to do so explicitly.
1214         if (!cur.result().dispatched())
1215                 cur.dispatch(cmd);
1216
1217         // Redraw if requested and necessary.
1218         if (cur.result().dispatched() && cur.result().update())
1219                 return update(cur.result().update());
1220
1221         return false;
1222 }
1223
1224
1225 void BufferView::scroll(int /*lines*/)
1226 {
1227 //      if (!buffer_)
1228 //              return;
1229 //
1230 //      LyXText const * t = &buffer_->text();
1231 //      int const line_height = defaultRowHeight();
1232 //
1233 //      // The new absolute coordinate
1234 //      int new_top_y = top_y() + lines * line_height;
1235 //
1236 //      // Restrict to a valid value
1237 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
1238 //      new_top_y = std::max(0, new_top_y);
1239 //
1240 //      scrollDocView(new_top_y);
1241 //
1242 }
1243
1244
1245 void BufferView::setCursorFromRow(int row)
1246 {
1247         int tmpid = -1;
1248         int tmppos = -1;
1249
1250         buffer_->texrow().getIdFromRow(row, tmpid, tmppos);
1251
1252         if (tmpid == -1)
1253                 buffer_->text().setCursor(cursor_, 0, 0);
1254         else
1255                 buffer_->text().setCursor(cursor_, buffer_->getParFromID(tmpid).pit(), tmppos);
1256 }
1257
1258
1259 void BufferView::gotoLabel(docstring const & label)
1260 {
1261         for (InsetIterator it = inset_iterator_begin(buffer_->inset()); it; ++it) {
1262                 vector<docstring> labels;
1263                 it->getLabelList(*buffer_, labels);
1264                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1265                         setCursor(it);
1266                         update();
1267                         return;
1268                 }
1269         }
1270 }
1271
1272
1273 TextMetrics const & BufferView::textMetrics(LyXText const * t) const
1274 {
1275         return const_cast<BufferView *>(this)->textMetrics(t);
1276 }
1277
1278
1279 TextMetrics & BufferView::textMetrics(LyXText const * t)
1280 {
1281         TextMetricsCache::iterator tmc_it  = text_metrics_.find(t);
1282         if (tmc_it == text_metrics_.end()) {
1283                 tmc_it = text_metrics_.insert(
1284                         make_pair(t, TextMetrics(this, const_cast<LyXText *>(t)))).first;
1285         }
1286         return tmc_it->second;
1287 }
1288
1289
1290 ParagraphMetrics const & BufferView::parMetrics(LyXText const * t,
1291                 pit_type pit) const
1292 {
1293         return textMetrics(t).parMetrics(pit);
1294 }
1295
1296
1297 int BufferView::workHeight() const
1298 {
1299         return height_;
1300 }
1301
1302
1303 void BufferView::setCursor(DocIterator const & dit)
1304 {
1305         size_t const n = dit.depth();
1306         for (size_t i = 0; i < n; ++i)
1307                 dit[i].inset().edit(cursor_, true);
1308
1309         cursor_.setCursor(dit);
1310         cursor_.selection() = false;
1311 }
1312
1313
1314 bool BufferView::checkDepm(LCursor & cur, LCursor & old)
1315 {
1316         // Would be wrong to delete anything if we have a selection.
1317         if (cur.selection())
1318                 return false;
1319
1320         bool need_anchor_change = false;
1321         bool changed = cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1322                 need_anchor_change);
1323
1324         if (need_anchor_change)
1325                 cur.resetAnchor();
1326
1327         if (!changed)
1328                 return false;
1329
1330         updateLabels(*buffer_);
1331
1332         updateMetrics(false);
1333         buffer_->changed();
1334         return true;
1335 }
1336
1337
1338 bool BufferView::mouseSetCursor(LCursor & cur)
1339 {
1340         BOOST_ASSERT(&cur.bv() == this);
1341
1342         // Has the cursor just left the inset?
1343         bool badcursor = false;
1344         if (&cursor_.inset() != &cur.inset())
1345                 badcursor = cursor_.inset().notifyCursorLeaves(cursor_);
1346
1347         // do the dEPM magic if needed
1348         // FIXME: move this to InsetText::notifyCursorLeaves?
1349         bool update = false;
1350         if (!badcursor && cursor_.inTexted())
1351                 checkDepm(cur, cursor_);
1352
1353         // if the cursor was in an empty script inset and the new
1354         // position is in the nucleus of the inset, notifyCursorLeaves
1355         // will kill the script inset itself. So we check all the
1356         // elements of the cursor to make sure that they are correct.
1357         // For an example, see bug 2933:
1358         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1359         // The code below could maybe be moved to a DocIterator method.
1360         //lyxerr << "cur before " << cur <<std::endl;
1361         DocIterator dit(cur.inset());
1362         dit.push_back(cur.bottom());
1363         size_t i = 1;
1364         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1365                 dit.push_back(cur[i]);
1366                 ++i;
1367         }
1368         //lyxerr << "5 cur after" << dit <<std::endl;
1369
1370         cursor_.setCursor(dit);
1371         cursor_.clearSelection();
1372         finishUndo();
1373         return update;
1374 }
1375
1376
1377 void BufferView::putSelectionAt(DocIterator const & cur,
1378                                 int length, bool backwards)
1379 {
1380         cursor_.clearSelection();
1381
1382         setCursor(cur);
1383
1384         if (length) {
1385                 if (backwards) {
1386                         cursor_.pos() += length;
1387                         cursor_.setSelection(cursor_, -length);
1388                 } else
1389                         cursor_.setSelection(cursor_, length);
1390                 cap::saveSelection(cursor_);
1391         }
1392 }
1393
1394
1395 LCursor & BufferView::cursor()
1396 {
1397         return cursor_;
1398 }
1399
1400
1401 LCursor const & BufferView::cursor() const
1402 {
1403         return cursor_;
1404 }
1405
1406
1407 pit_type BufferView::anchor_ref() const
1408 {
1409         return anchor_ref_;
1410 }
1411
1412
1413 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1414 {
1415         return metrics_info_;
1416 }
1417
1418
1419 // FIXME: We should split-up updateMetrics() for the singlepar case.
1420 void BufferView::updateMetrics(bool singlepar)
1421 {
1422         LyXText & buftext = buffer_->text();
1423         TextMetrics & tm = textMetrics(&buftext);
1424         pit_type size = int(buftext.paragraphs().size());
1425
1426         if (anchor_ref_ > int(buftext.paragraphs().size() - 1)) {
1427                 anchor_ref_ = int(buftext.paragraphs().size() - 1);
1428                 offset_ref_ = 0;
1429         }
1430
1431         // If the paragraph metrics has changed, we can not
1432         // use the singlepar optimisation.
1433         if (singlepar
1434                 // In Single Paragraph mode, rebreak only
1435                 // the (main text, not inset!) paragraph containing the cursor.
1436                 // (if this paragraph contains insets etc., rebreaking will
1437                 // recursively descend)
1438                 && tm.redoParagraph(cursor_.bottom().pit()))
1439                 singlepar = false;
1440
1441         pit_type const pit = anchor_ref_;
1442         int pit1 = pit;
1443         int pit2 = pit;
1444         size_t const npit = buftext.paragraphs().size();
1445
1446         // Rebreak anchor paragraph.
1447         if (!singlepar)
1448                 tm.redoParagraph(pit);
1449
1450         // Clear out the position cache in case of full screen redraw.
1451         if (!singlepar)
1452                 coord_cache_.clear();
1453
1454         int y0 = tm.parMetrics(pit).ascent() - offset_ref_;
1455
1456         // Redo paragraphs above anchor if necessary.
1457         int y1 = y0;
1458         while (y1 > 0 && pit1 > 0) {
1459                 y1 -= tm.parMetrics(pit1).ascent();
1460                 --pit1;
1461                 if (!singlepar)
1462                         tm.redoParagraph(pit1);
1463                 y1 -= tm.parMetrics(pit1).descent();
1464         }
1465
1466
1467         // Take care of ascent of first line
1468         y1 -= tm.parMetrics(pit1).ascent();
1469
1470         // Normalize anchor for next time
1471         anchor_ref_ = pit1;
1472         offset_ref_ = -y1;
1473
1474         // Grey at the beginning is ugly
1475         if (pit1 == 0 && y1 > 0) {
1476                 y0 -= y1;
1477                 y1 = 0;
1478                 anchor_ref_ = 0;
1479         }
1480
1481         // Redo paragraphs below the anchor if necessary.
1482         int y2 = y0;
1483         while (y2 < height_ && pit2 < int(npit) - 1) {
1484                 y2 += tm.parMetrics(pit2).descent();
1485                 ++pit2;
1486                 if (!singlepar)
1487                         tm.redoParagraph(pit2);
1488                 y2 += tm.parMetrics(pit2).ascent();
1489         }
1490
1491         // Take care of descent of last line
1492         y2 += tm.parMetrics(pit2).descent();
1493
1494         // The coordinates of all these paragraphs are correct, cache them
1495         int y = y1;
1496         CoordCache::InnerParPosCache & parPos = coord_cache_.parPos()[&buftext];
1497         for (pit_type pit = pit1; pit <= pit2; ++pit) {
1498                 ParagraphMetrics const & pm = tm.parMetrics(pit);
1499                 y += pm.ascent();
1500                 parPos[pit] = Point(0, y);
1501                 if (singlepar && pit == cursor_.bottom().pit()) {
1502                         // In Single Paragraph mode, collect here the
1503                         // y1 and y2 of the (one) paragraph the cursor is in
1504                         y1 = y - pm.ascent();
1505                         y2 = y + pm.descent();
1506                 }
1507                 y += pm.descent();
1508         }
1509
1510         if (singlepar) {
1511                 // collect cursor paragraph iter bounds
1512                 pit1 = cursor_.bottom().pit();
1513                 pit2 = cursor_.bottom().pit();
1514         }
1515
1516         LYXERR(Debug::DEBUG)
1517                 << BOOST_CURRENT_FUNCTION
1518                 << " y1: " << y1
1519                 << " y2: " << y2
1520                 << " pit1: " << pit1
1521                 << " pit2: " << pit2
1522                 << " npit: " << npit
1523                 << " singlepar: " << singlepar
1524                 << "size: " << size
1525                 << endl;
1526
1527         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2,
1528                 singlepar? SingleParUpdate: FullScreenUpdate, size);
1529
1530         if (lyxerr.debugging(Debug::WORKAREA)) {
1531                 LYXERR(Debug::WORKAREA) << "BufferView::updateMetrics" << endl;
1532                 coord_cache_.dump();
1533         }
1534 }
1535
1536
1537 void BufferView::menuInsertLyXFile(string const & filenm)
1538 {
1539         BOOST_ASSERT(cursor_.inTexted());
1540         string filename = filenm;
1541
1542         if (filename.empty()) {
1543                 // Launch a file browser
1544                 // FIXME UNICODE
1545                 string initpath = lyxrc.document_path;
1546
1547                 if (buffer_) {
1548                         string const trypath = buffer_->filePath();
1549                         // If directory is writeable, use this as default.
1550                         if (isDirWriteable(FileName(trypath)))
1551                                 initpath = trypath;
1552                 }
1553
1554                 // FIXME UNICODE
1555                 FileDialog fileDlg(_("Select LyX document to insert"),
1556                         LFUN_FILE_INSERT,
1557                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1558                         make_pair(_("Examples|#E#e"), from_utf8(addPath(package().system_support(), "examples"))));
1559
1560                 FileDialog::Result result =
1561                         fileDlg.open(from_utf8(initpath),
1562                                      FileFilterList(_("LyX Documents (*.lyx)")),
1563                                      docstring());
1564
1565                 if (result.first == FileDialog::Later)
1566                         return;
1567
1568                 // FIXME UNICODE
1569                 filename = to_utf8(result.second);
1570
1571                 // check selected filename
1572                 if (filename.empty()) {
1573                         // emit message signal.
1574                         message(_("Canceled."));
1575                         return;
1576                 }
1577         }
1578
1579         // Get absolute path of file and add ".lyx"
1580         // to the filename if necessary
1581         filename = fileSearch(string(), filename, "lyx").absFilename();
1582
1583         docstring const disp_fn = makeDisplayPath(filename);
1584         // emit message signal.
1585         message(bformat(_("Inserting document %1$s..."), disp_fn));
1586
1587         docstring res;
1588         Buffer buf("", false);
1589         if (lyx::loadLyXFile(&buf, FileName(filename))) {
1590                 ErrorList & el = buffer_->errorList("Parse");
1591                 // Copy the inserted document error list into the current buffer one.
1592                 el = buf.errorList("Parse");
1593                 recordUndo(cursor_);
1594                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1595                                              buf.params().textclass, el);
1596                 res = _("Document %1$s inserted.");
1597         } else
1598                 res = _("Could not insert document %1$s");
1599
1600         // emit message signal.
1601         message(bformat(res, disp_fn));
1602         buffer_->errors("Parse");
1603         resize();
1604 }
1605
1606 } // namespace lyx