src/BufferView.cpp

   1 /**
   2  * \file BufferView.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Alfredo Braunstein
   7  * \author Lars Gullik Bjønnes
   8  * \author John Levon
   9  * \author André Pönitz
  10  * \author Jürgen Vigna
  11  *
  12  * Full author contact details are available in file CREDITS.
  13  */
  14
  15 #include <config.h>
  16
  17 #include "BufferView.h"
  18
  19 #include "Buffer.h"
  20 #include "buffer_funcs.h"
  21 #include "BufferList.h"
  22 #include "BufferParams.h"
  23 #include "bufferview_funcs.h"
  24 #include "CoordCache.h"
  25 #include "CutAndPaste.h"
  26 #include "debug.h"
  27 #include "DispatchResult.h"
  28 #include "ErrorList.h"
  29 #include "factory.h"
  30 #include "FloatList.h"
  31 #include "FuncRequest.h"
  32 #include "FuncStatus.h"
  33 #include "gettext.h"
  34 #include "Intl.h"
  35 #include "InsetIterator.h"
  36 #include "Language.h"
  37 #include "LaTeXFeatures.h"
  38 #include "callback.h" // added for Dispatch functions
  39 #include "LyX.h"
  40 #include "lyxfind.h"
  41 #include "LyXFunc.h"
  42 #include "Layout.h"
  43 #include "Text.h"
  44 #include "TextClass.h"
  45 #include "LyXRC.h"
  46 #include "Session.h"
  47 #include "Paragraph.h"
  48 #include "paragraph_funcs.h"
  49 #include "ParagraphParameters.h"
  50 #include "ParIterator.h"
  51 #include "TexRow.h"
  52 #include "toc.h"
  53 #include "Undo.h"
  54 #include "VSpace.h"
  55 #include "WordLangTuple.h"
  56 #include "MetricsInfo.h"
  57
  58 #include "insets/InsetBibtex.h"
  59 #include "insets/InsetCommand.h" // ChangeRefs
  60 #include "insets/InsetRef.h"
  61 #include "insets/InsetText.h"
  62
  63 #include "frontends/alert.h"
  64 #include "frontends/FileDialog.h"
  65 #include "frontends/FontMetrics.h"
  66
  67 #include "graphics/Previews.h"
  68
  69 #include "support/convert.h"
  70 #include "support/FileFilterList.h"
  71 #include "support/filetools.h"
  72 #include "support/Package.h"
  73 #include "support/types.h"
  74
  75 #include <boost/bind.hpp>
  76 #include <boost/current_function.hpp>
  77
  78 #include <functional>
  79 #include <vector>
  80
  81
  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(Cursor & cur, Inset::Code code)
 111 {
 112         T * inset = 0;
 113         DocIterator it = cur;
 114         if (it.nextInset() &&
 115             it.nextInset()->lyxCode() == code) {
 116                 inset = static_cast<T*>(it.nextInset());
 117         }
 118         return inset;
 119 }
 120
 121 } // anon namespace
 122
 123
 124 BufferView::BufferView()
 125         : width_(0), height_(0), buffer_(0), wh_(0),
 126           cursor_(*this),
 127           multiparsel_cache_(false), anchor_ref_(0), offset_ref_(0),
 128           intl_(new Intl), last_inset_(0)
 129 {
 130         xsel_cache_.set = false;
 131         intl_->initKeyMapper(lyxrc.use_kbmap);
 132 }
 133
 134
 135 BufferView::~BufferView()
 136 {
 137 }
 138
 139
 140 Buffer * BufferView::buffer() const
 141 {
 142         return buffer_;
 143 }
 144
 145
 146 void BufferView::setBuffer(Buffer * b)
 147 {
 148         LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
 149                             << "[ b = " << b << "]" << endl;
 150
 151         if (buffer_) {
 152                 // Save the 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 top_id or bottom_pit, bottom_pos has been changed, update bookmark
 163                         // see http://bugzilla.lyx.org/show_bug.cgi?id=3092
 164                         pit_type new_pit;
 165                         pos_type new_pos;
 166                         int new_id;
 167                         boost::tie(new_pit, new_pos, new_id) = moveToPosition(bm.bottom_pit, bm.bottom_pos, bm.top_id, bm.top_pos);
 168                         if (bm.bottom_pit != new_pit || bm.bottom_pos != new_pos || bm.top_id != new_id )
 169                                 const_cast<BookmarksSection::Bookmark &>(bm).updatePos(new_pit, new_pos, new_id);
 170                 }
 171                 // current buffer is going to be switched-off, save cursor pos
 172                 // Ideally, the whole cursor stack should be saved, but session
 173                 // currently can only handle bottom (whole document) level pit and pos.
 174                 // That is to say, if a cursor is in a nested inset, it will be
 175                 // restore to the left of the top level inset.
 176                 LyX::ref().session().lastFilePos().save(FileName(buffer_->fileName()),
 177                         boost::tie(cursor_.bottom().pit(), cursor_.bottom().pos()) );
 178         }
 179
 180         // If we're quitting lyx, don't bother updating stuff
 181         if (quitting) {
 182                 buffer_ = 0;
 183                 return;
 184         }
 185
 186         //FIXME Fix for bug 3440 is here.
 187         // If we are closing current buffer, switch to the first in
 188         // buffer list.
 189         if (!b) {
 190                 LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
 191                                     << " No Buffer!" << endl;
 192                 // We are closing the buffer, use the first buffer as current
 193                 //FIXME 3440
 194                 // if (last_buffer_) buffer_ = last_buffer_;
 195                 // also check that this is in theBufferList()?
 196                 buffer_ = theBufferList().first();
 197         } else {
 198                 //FIXME 3440
 199                 // last_buffer = buffer_;
 200                 // Set current buffer
 201                 buffer_ = b;
 202         }
 203
 204         // Reset old cursor
 205         cursor_ = Cursor(*this);
 206         anchor_ref_ = 0;
 207         offset_ref_ = 0;
 208
 209         if (!buffer_)
 210                 return;
 211
 212         LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
 213                                         << "Buffer addr: " << buffer_ << endl;
 214         cursor_.push(buffer_->inset());
 215         cursor_.resetAnchor();
 216         buffer_->text().setCurrentFont(cursor_);
 217
 218         // Update the metrics now that we have a proper Cursor.
 219         updateMetrics(false);
 220
 221         // FIXME: This code won't be needed once we switch to
 222         // "one Buffer" / "one BufferView".
 223         if (buffer_->getCursor().size() > 0 &&
 224                         buffer_->getAnchor().size() > 0)
 225         {
 226                 cursor_.setCursor(buffer_->getAnchor().asDocIterator(&(buffer_->inset())));
 227                 cursor_.resetAnchor();
 228                 cursor_.setCursor(buffer_->getCursor().asDocIterator(&(buffer_->inset())));
 229                 cursor_.setSelection();
 230                 // do not set selection to the new buffer because we
 231                 // only paste recent selection.
 232
 233                 // Make sure that the restored cursor is not broken. This can happen for
 234                 // example if this Buffer has been modified by another view.
 235                 cursor_.fixIfBroken();
 236
 237                 if (fitCursor())
 238                         // Update the metrics if the cursor new position was off screen.
 239                         updateMetrics(false);
 240         }
 241
 242         if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 243                 graphics::Previews::get().generateBufferPreviews(*buffer_);
 244 }
 245
 246
 247 void BufferView::resize()
 248 {
 249         if (!buffer_)
 250                 return;
 251
 252         LYXERR(Debug::DEBUG) << BOOST_CURRENT_FUNCTION << endl;
 253
 254         updateMetrics(false);
 255 }
 256
 257
 258 bool BufferView::fitCursor()
 259 {
 260         if (bv_funcs::status(this, cursor_) == bv_funcs::CUR_INSIDE) {
 261                 frontend::FontMetrics const & fm =
 262                         theFontMetrics(cursor_.getFont());
 263                 int const asc = fm.maxAscent();
 264                 int const des = fm.maxDescent();
 265                 Point const p = bv_funcs::getPos(*this, cursor_, cursor_.boundary());
 266                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 267                         return false;
 268         }
 269         center();
 270         return true;
 271 }
 272
 273
 274 bool BufferView::multiParSel()
 275 {
 276         if (!cursor_.selection())
 277                 return false;
 278         bool ret = multiparsel_cache_;
 279         multiparsel_cache_ = cursor_.selBegin().pit() != cursor_.selEnd().pit();
 280         // Either this, or previous selection spans paragraphs
 281         return ret || multiparsel_cache_;
 282 }
 283
 284
 285 bool BufferView::update(Update::flags flags)
 286 {
 287         // last_inset_ points to the last visited inset. This pointer may become
 288         // invalid because of keyboard editing. Since all such operations
 289         // causes screen update(), I reset last_inset_ to avoid such a problem.
 290         last_inset_ = 0;
 291         // This is close to a hot-path.
 292         LYXERR(Debug::DEBUG)
 293                 << BOOST_CURRENT_FUNCTION
 294                 << "[fitcursor = " << (flags & Update::FitCursor)
 295                 << ", forceupdate = " << (flags & Update::Force)
 296                 << ", singlepar = " << (flags & Update::SinglePar)
 297                 << "]  buffer: " << buffer_ << endl;
 298
 299         // Check needed to survive LyX startup
 300         if (!buffer_)
 301                 return false;
 302
 303         LYXERR(Debug::WORKAREA) << "BufferView::update" << std::endl;
 304
 305         // Update macro store
 306         if (!(cursor().inMathed() && cursor().inMacroMode()))
 307                 buffer_->buildMacros();
 308
 309         // Now do the first drawing step if needed. This consists on updating
 310         // the CoordCache in updateMetrics().
 311         // The second drawing step is done in WorkArea::redraw() if needed.
 312
 313         // Case when no explicit update is requested.
 314         if (!flags) {
 315                 // no need to redraw anything.
 316                 metrics_info_.update_strategy = NoScreenUpdate;
 317                 return false;
 318         }
 319
 320         if (flags == Update::Decoration) {
 321                 metrics_info_.update_strategy = DecorationUpdate;
 322                 return true;
 323         }
 324
 325         if (flags == Update::FitCursor
 326                 || flags == (Update::Decoration | Update::FitCursor)) {
 327                 bool const fit_cursor = fitCursor();
 328                 // tell the frontend to update the screen if needed.
 329                 if (fit_cursor) {
 330                         updateMetrics(false);
 331                         return true;
 332                 }
 333                 if (flags & Update::Decoration) {
 334                         metrics_info_.update_strategy = DecorationUpdate;
 335                         return true;
 336                 }
 337                 // no screen update is needed.
 338                 metrics_info_.update_strategy = NoScreenUpdate;
 339                 return false;
 340         }
 341
 342         bool full_metrics = flags & Update::Force;
 343         if (flags & Update::MultiParSel)
 344                 full_metrics |= multiParSel();
 345
 346         bool const single_par = !full_metrics;
 347         updateMetrics(single_par);
 348
 349         if (flags & Update::FitCursor && fitCursor())
 350                 updateMetrics(false);
 351
 352         // tell the frontend to update the screen.
 353         return true;
 354 }
 355
 356
 357 void BufferView::updateScrollbar()
 358 {
 359         if (!buffer_) {
 360                 LYXERR(Debug::DEBUG) << BOOST_CURRENT_FUNCTION
 361                                      << " no text in updateScrollbar" << endl;
 362                 scrollbarParameters_.reset();
 363                 return;
 364         }
 365
 366         Text & t = buffer_->text();
 367         TextMetrics & tm = text_metrics_[&t];
 368
 369         int const parsize = int(t.paragraphs().size() - 1);
 370         if (anchor_ref_ >  parsize)  {
 371                 anchor_ref_ = parsize;
 372                 offset_ref_ = 0;
 373         }
 374
 375         LYXERR(Debug::GUI)
 376                 << BOOST_CURRENT_FUNCTION
 377                 << " Updating scrollbar: height: " << t.paragraphs().size()
 378                 << " curr par: " << cursor_.bottom().pit()
 379                 << " default height " << defaultRowHeight() << endl;
 380
 381         // It would be better to fix the scrollbar to understand
 382         // values in [0..1] and divide everything by wh
 383
 384         // estimated average paragraph height:
 385         if (wh_ == 0)
 386                 wh_ = height_ / 4;
 387
 388         int h = tm.parMetrics(anchor_ref_).height();
 389
 390         // Normalize anchor/offset (MV):
 391         while (offset_ref_ > h && anchor_ref_ < parsize) {
 392                 anchor_ref_++;
 393                 offset_ref_ -= h;
 394                 h = tm.parMetrics(anchor_ref_).height();
 395         }
 396         // Look at paragraph heights on-screen
 397         int sumh = 0;
 398         int nh = 0;
 399         for (pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 400                 if (sumh > height_)
 401                         break;
 402                 int const h2 = tm.parMetrics(pit).height();
 403                 sumh += h2;
 404                 nh++;
 405         }
 406
 407         BOOST_ASSERT(nh);
 408         int const hav = sumh / nh;
 409         // More realistic average paragraph height
 410         if (hav > wh_)
 411                 wh_ = hav;
 412
 413         BOOST_ASSERT(h);
 414         scrollbarParameters_.height = (parsize + 1) * wh_;
 415         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 416         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 417 }
 418
 419
 420 ScrollbarParameters const & BufferView::scrollbarParameters() const
 421 {
 422         return scrollbarParameters_;
 423 }
 424
 425
 426 void BufferView::scrollDocView(int value)
 427 {
 428         LYXERR(Debug::GUI) << BOOST_CURRENT_FUNCTION
 429                            << "[ value = " << value << "]" << endl;
 430
 431         if (!buffer_)
 432                 return;
 433
 434         Text & t = buffer_->text();
 435         TextMetrics & tm = text_metrics_[&t];
 436
 437         float const bar = value / float(wh_ * t.paragraphs().size());
 438
 439         anchor_ref_ = int(bar * t.paragraphs().size());
 440         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 441                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 442
 443         tm.redoParagraph(anchor_ref_);
 444         int const h = tm.parMetrics(anchor_ref_).height();
 445         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 446         updateMetrics(false);
 447 }
 448
 449
 450 void BufferView::setCursorFromScrollbar()
 451 {
 452         if (!buffer_)
 453                 return;
 454
 455         Text & t = buffer_->text();
 456
 457         int const height = 2 * defaultRowHeight();
 458         int const first = height;
 459         int const last = height_ - height;
 460         Cursor & cur = cursor_;
 461
 462         bv_funcs::CurStatus st = bv_funcs::status(this, cur);
 463
 464         switch (st) {
 465         case bv_funcs::CUR_ABOVE:
 466                 // We reset the cursor because bv_funcs::status() does not
 467                 // work when the cursor is within mathed.
 468                 cur.reset(buffer_->inset());
 469                 t.setCursorFromCoordinates(cur, 0, first);
 470                 cur.clearSelection();
 471                 break;
 472         case bv_funcs::CUR_BELOW:
 473                 // We reset the cursor because bv_funcs::status() does not
 474                 // work when the cursor is within mathed.
 475                 cur.reset(buffer_->inset());
 476                 t.setCursorFromCoordinates(cur, 0, last);
 477                 cur.clearSelection();
 478                 break;
 479         case bv_funcs::CUR_INSIDE:
 480                 int const y = bv_funcs::getPos(*this, cur, cur.boundary()).y_;
 481                 int const newy = min(last, max(y, first));
 482                 if (y != newy) {
 483                         cur.reset(buffer_->inset());
 484                         t.setCursorFromCoordinates(cur, 0, newy);
 485                 }
 486         }
 487 }
 488
 489
 490 Change const BufferView::getCurrentChange() const
 491 {
 492         if (!cursor_.selection())
 493                 return Change(Change::UNCHANGED);
 494
 495         DocIterator dit = cursor_.selectionBegin();
 496         return dit.paragraph().lookupChange(dit.pos());
 497 }
 498
 499
 500 void BufferView::saveBookmark(unsigned int idx)
 501 {
 502         // tenatively save bookmark, id and pos will be used to
 503         // acturately locate a bookmark in a 'live' lyx session.
 504         // pit and pos will be updated with bottom level pit/pos
 505         // when lyx exits.
 506         LyX::ref().session().bookmarks().save(
 507                 FileName(buffer_->fileName()),
 508                 cursor_.bottom().pit(),
 509                 cursor_.bottom().pos(),
 510                 cursor_.paragraph().id(),
 511                 cursor_.pos(),
 512                 idx
 513         );
 514         if (idx)
 515                 // emit message signal.
 516                 message(_("Save bookmark"));
 517 }
 518
 519
 520 boost::tuple<pit_type, pos_type, int> BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 521         int top_id, pos_type top_pos)
 522 {
 523         cursor_.clearSelection();
 524
 525         // if a valid par_id is given, try it first
 526         // This is the case for a 'live' bookmark when unique paragraph ID
 527         // is used to track bookmarks.
 528         if (top_id > 0) {
 529                 ParIterator par = buffer_->getParFromID(top_id);
 530                 if (par != buffer_->par_iterator_end()) {
 531                         DocIterator dit = makeDocIterator(par, min(par->size(), top_pos));
 532                         // Some slices of the iterator may not be
 533                         // reachable (e.g. closed collapsable inset)
 534                         // so the dociterator may need to be
 535                         // shortened. Otherwise, setCursor may crash
 536                         // lyx when the cursor can not be set to these
 537                         // insets.
 538                         size_t const n = dit.depth();
 539                         for (size_t i = 0; i < n; ++i)
 540                                 if (dit[i].inset().editable() != Inset::HIGHLY_EDITABLE) {
 541                                         dit.resize(i);
 542                                         break;
 543                                 }
 544                         setCursor(dit);
 545                         // Note: return bottom (document) level pit.
 546                         return boost::make_tuple(cursor_.bottom().pit(), cursor_.bottom().pos(), top_id);
 547                 }
 548         }
 549         // if top_id == 0, or searching through top_id failed
 550         // This is the case for a 'restored' bookmark when only bottom
 551         // (document level) pit was saved. Because of this, bookmark
 552         // restoration is inaccurate. If a bookmark was within an inset,
 553         // it will be restored to the left of the outmost inset that contains
 554         // the bookmark.
 555         if (static_cast<size_t>(bottom_pit) < buffer_->paragraphs().size()) {
 556                 DocIterator it = doc_iterator_begin(buffer_->inset());
 557                 it.pit() = bottom_pit;
 558                 it.pos() = min(bottom_pos, it.paragraph().size());
 559                 setCursor(it);
 560                 return boost::make_tuple(it.pit(), it.pos(),
 561                                          it.paragraph().id());
 562         }
 563         // both methods fail
 564         return boost::make_tuple(pit_type(0), pos_type(0), 0);
 565 }
 566
 567
 568 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 569 {
 570         if (lyxrc.rtl_support) {
 571                 if (cursor_.innerText()->real_current_font.isRightToLeft()) {
 572                         if (intl_->keymap == Intl::PRIMARY)
 573                                 intl_->keyMapSec();
 574                 } else {
 575                         if (intl_->keymap == Intl::SECONDARY)
 576                                 intl_->keyMapPrim();
 577                 }
 578         }
 579
 580         intl_->getTransManager().translateAndInsert(c, t, cur);
 581 }
 582
 583
 584 int BufferView::workWidth() const
 585 {
 586         return width_;
 587 }
 588
 589
 590 void BufferView::center()
 591 {
 592         CursorSlice & bot = cursor_.bottom();
 593         TextMetrics & tm = text_metrics_[bot.text()];
 594         pit_type const pit = bot.pit();
 595         tm.redoParagraph(pit);
 596         ParagraphMetrics const & pm = tm.parMetrics(pit);
 597         anchor_ref_ = pit;
 598         offset_ref_ = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary()).y_
 599                 + pm.ascent() - height_ / 2;
 600 }
 601
 602
 603 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 604 {
 605         FuncStatus flag;
 606
 607         Cursor & cur = cursor_;
 608
 609         switch (cmd.action) {
 610
 611         case LFUN_UNDO:
 612                 flag.enabled(!buffer_->undostack().empty());
 613                 break;
 614         case LFUN_REDO:
 615                 flag.enabled(!buffer_->redostack().empty());
 616                 break;
 617         case LFUN_FILE_INSERT:
 618         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 619         case LFUN_FILE_INSERT_PLAINTEXT:
 620         case LFUN_BOOKMARK_SAVE:
 621                 // FIXME: Actually, these LFUNS should be moved to Text
 622                 flag.enabled(cur.inTexted());
 623                 break;
 624         case LFUN_FONT_STATE:
 625         case LFUN_LABEL_INSERT:
 626         case LFUN_PARAGRAPH_GOTO:
 627         // FIXME handle non-trivially
 628         case LFUN_OUTLINE_UP:
 629         case LFUN_OUTLINE_DOWN:
 630         case LFUN_OUTLINE_IN:
 631         case LFUN_OUTLINE_OUT:
 632         case LFUN_NOTE_NEXT:
 633         case LFUN_REFERENCE_NEXT:
 634         case LFUN_WORD_FIND:
 635         case LFUN_WORD_REPLACE:
 636         case LFUN_MARK_OFF:
 637         case LFUN_MARK_ON:
 638         case LFUN_MARK_TOGGLE:
 639         case LFUN_SCREEN_RECENTER:
 640         case LFUN_BIBTEX_DATABASE_ADD:
 641         case LFUN_BIBTEX_DATABASE_DEL:
 642         case LFUN_WORDS_COUNT:
 643         case LFUN_NEXT_INSET_TOGGLE:
 644                 flag.enabled(true);
 645                 break;
 646
 647         case LFUN_LABEL_GOTO: {
 648                 flag.enabled(!cmd.argument().empty()
 649                     || getInsetByCode<InsetRef>(cur, Inset::REF_CODE));
 650                 break;
 651         }
 652
 653         case LFUN_CHANGES_TRACK:
 654                 flag.enabled(true);
 655                 flag.setOnOff(buffer_->params().trackChanges);
 656                 break;
 657
 658         case LFUN_CHANGES_OUTPUT:
 659                 flag.enabled(buffer_);
 660                 flag.setOnOff(buffer_->params().outputChanges);
 661                 break;
 662
 663         case LFUN_CHANGES_MERGE:
 664         case LFUN_CHANGE_NEXT:
 665         case LFUN_ALL_CHANGES_ACCEPT:
 666         case LFUN_ALL_CHANGES_REJECT:
 667                 // TODO: context-sensitive enabling of LFUNs
 668                 // In principle, these command should only be enabled if there
 669                 // is a change in the document. However, without proper
 670                 // optimizations, this will inevitably result in poor performance.
 671                 flag.enabled(buffer_);
 672                 break;
 673
 674         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 675                 flag.setOnOff(buffer_->params().compressed);
 676                 break;
 677         }
 678
 679         default:
 680                 flag.enabled(false);
 681         }
 682
 683         return flag;
 684 }
 685
 686
 687 Update::flags BufferView::dispatch(FuncRequest const & cmd)
 688 {
 689         //lyxerr << BOOST_CURRENT_FUNCTION
 690         //       << [ cmd = " << cmd << "]" << endl;
 691
 692         // Make sure that the cached BufferView is correct.
 693         LYXERR(Debug::ACTION) << BOOST_CURRENT_FUNCTION
 694                 << " action[" << cmd.action << ']'
 695                 << " arg[" << to_utf8(cmd.argument()) << ']'
 696                 << " x[" << cmd.x << ']'
 697                 << " y[" << cmd.y << ']'
 698                 << " button[" << cmd.button() << ']'
 699                 << endl;
 700
 701         // FIXME: this should not be possible.
 702         if (!buffer_)
 703                 return Update::None;
 704
 705         Cursor & cur = cursor_;
 706         // Default Update flags.
 707         Update::flags updateFlags = Update::Force | Update::FitCursor;
 708
 709         switch (cmd.action) {
 710
 711         case LFUN_UNDO:
 712                 cur.message(_("Undo"));
 713                 cur.clearSelection();
 714                 if (!textUndo(*this)) {
 715                         cur.message(_("No further undo information"));
 716                         updateFlags = Update::None;
 717                 }
 718                 break;
 719
 720         case LFUN_REDO:
 721                 cur.message(_("Redo"));
 722                 cur.clearSelection();
 723                 if (!textRedo(*this)) {
 724                         cur.message(_("No further redo information"));
 725                         updateFlags = Update::None;
 726                 }
 727                 break;
 728
 729         case LFUN_FILE_INSERT:
 730                 // FIXME UNICODE
 731                 menuInsertLyXFile(to_utf8(cmd.argument()));
 732                 break;
 733
 734         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 735                 // FIXME UNICODE
 736                 insertPlaintextFile(this, to_utf8(cmd.argument()), true);
 737                 break;
 738
 739         case LFUN_FILE_INSERT_PLAINTEXT:
 740                 // FIXME UNICODE
 741                 insertPlaintextFile(this, to_utf8(cmd.argument()), false);
 742                 break;
 743
 744         case LFUN_FONT_STATE:
 745                 cur.message(cur.currentState());
 746                 break;
 747
 748         case LFUN_BOOKMARK_SAVE:
 749                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 750                 break;
 751
 752         case LFUN_LABEL_GOTO: {
 753                 docstring label = cmd.argument();
 754                 if (label.empty()) {
 755                         InsetRef * inset =
 756                                 getInsetByCode<InsetRef>(cursor_,
 757                                                          Inset::REF_CODE);
 758                         if (inset) {
 759                                 label = inset->getParam("reference");
 760                                 // persistent=false: use temp_bookmark
 761                                 saveBookmark(0);
 762                         }
 763                 }
 764
 765                 if (!label.empty())
 766                         gotoLabel(label);
 767                 break;
 768         }
 769
 770         case LFUN_PARAGRAPH_GOTO: {
 771                 int const id = convert<int>(to_utf8(cmd.argument()));
 772                 int i = 0;
 773                 for (Buffer * b = buffer_; i == 0 || b != buffer_; b = theBufferList().next(b)) {
 774                         ParIterator par = b->getParFromID(id);
 775                         if (par == b->par_iterator_end()) {
 776                                 LYXERR(Debug::INFO)
 777                                         << "No matching paragraph found! ["
 778                                         << id << "]." << endl;
 779                         } else {
 780                                 LYXERR(Debug::INFO)
 781                                         << "Paragraph " << par->id()
 782                                         << " found in buffer `"
 783                                         << b->fileName() << "'." << endl;
 784
 785                                 if (b == buffer_) {
 786                                         // Set the cursor
 787                                         setCursor(makeDocIterator(par, 0));
 788                                 } else {
 789                                         // Switch to other buffer view and resend cmd
 790                                         theLyXFunc().dispatch(FuncRequest(
 791                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 792                                         theLyXFunc().dispatch(cmd);
 793                                         updateFlags = Update::None;
 794                                 }
 795                                 break;
 796                         }
 797                         ++i;
 798                 }
 799                 break;
 800         }
 801
 802         case LFUN_OUTLINE_UP:
 803                 toc::outline(toc::Up, cursor_);
 804                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 805                 updateLabels(*buffer_);
 806                 break;
 807         case LFUN_OUTLINE_DOWN:
 808                 toc::outline(toc::Down, cursor_);
 809                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 810                 updateLabels(*buffer_);
 811                 break;
 812         case LFUN_OUTLINE_IN:
 813                 toc::outline(toc::In, cursor_);
 814                 updateLabels(*buffer_);
 815                 break;
 816         case LFUN_OUTLINE_OUT:
 817                 toc::outline(toc::Out, cursor_);
 818                 updateLabels(*buffer_);
 819                 break;
 820
 821         case LFUN_NOTE_NEXT:
 822                 bv_funcs::gotoInset(this, Inset::NOTE_CODE, false);
 823                 break;
 824
 825         case LFUN_REFERENCE_NEXT: {
 826                 vector<Inset_code> tmp;
 827                 tmp.push_back(Inset::LABEL_CODE);
 828                 tmp.push_back(Inset::REF_CODE);
 829                 bv_funcs::gotoInset(this, tmp, true);
 830                 break;
 831         }
 832
 833         case LFUN_CHANGES_TRACK:
 834                 buffer_->params().trackChanges = !buffer_->params().trackChanges;
 835                 break;
 836
 837         case LFUN_CHANGES_OUTPUT:
 838                 buffer_->params().outputChanges = !buffer_->params().outputChanges;
 839                 if (buffer_->params().outputChanges) {
 840                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
 841                         bool xcolorsoul = LaTeXFeatures::isAvailable("soul") &&
 842                                           LaTeXFeatures::isAvailable("xcolor");
 843
 844                         if (!dvipost && !xcolorsoul) {
 845                                 Alert::warning(_("Changes not shown in LaTeX output"),
 846                                                _("Changes will not be highlighted in LaTeX output, "
 847                                                  "because neither dvipost nor xcolor/soul are installed.\n"
 848                                                  "Please install these packages or redefine "
 849                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
 850                         } else if (!xcolorsoul) {
 851                                 Alert::warning(_("Changes not shown in LaTeX output"),
 852                                                _("Changes will not be highlighted in LaTeX output "
 853                                                  "when using pdflatex, because xcolor and soul are not installed.\n"
 854                                                  "Please install both packages or redefine "
 855                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
 856                         }
 857                 }
 858                 break;
 859
 860         case LFUN_CHANGE_NEXT:
 861                 findNextChange(this);
 862                 break;
 863
 864         case LFUN_CHANGES_MERGE:
 865                 if (findNextChange(this))
 866                         showDialog("changes");
 867                 break;
 868
 869         case LFUN_ALL_CHANGES_ACCEPT:
 870                 // select complete document
 871                 cursor_.reset(buffer_->inset());
 872                 cursor_.selHandle(true);
 873                 buffer_->text().cursorBottom(cursor_);
 874                 // accept everything in a single step to support atomic undo
 875                 buffer_->text().acceptOrRejectChanges(cursor_, Text::ACCEPT);
 876                 break;
 877
 878         case LFUN_ALL_CHANGES_REJECT:
 879                 // select complete document
 880                 cursor_.reset(buffer_->inset());
 881                 cursor_.selHandle(true);
 882                 buffer_->text().cursorBottom(cursor_);
 883                 // reject everything in a single step to support atomic undo
 884                 // Note: reject does not work recursively; the user may have to repeat the operation
 885                 buffer_->text().acceptOrRejectChanges(cursor_, Text::REJECT);
 886                 break;
 887
 888         case LFUN_WORD_FIND:
 889                 find(this, cmd);
 890                 break;
 891
 892         case LFUN_WORD_REPLACE: {
 893                 bool has_deleted = false;
 894                 if (cur.selection()) {
 895                         DocIterator beg = cur.selectionBegin();
 896                         DocIterator end = cur.selectionEnd();
 897                         if (beg.pit() == end.pit()) {
 898                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
 899                                         if (cur.paragraph().isDeleted(p))
 900                                                 has_deleted = true;
 901                                 }
 902                         }
 903                 }
 904                 replace(this, cmd, has_deleted);
 905                 break;
 906         }
 907
 908         case LFUN_MARK_OFF:
 909                 cur.clearSelection();
 910                 cur.resetAnchor();
 911                 cur.message(from_utf8(N_("Mark off")));
 912                 break;
 913
 914         case LFUN_MARK_ON:
 915                 cur.clearSelection();
 916                 cur.mark() = true;
 917                 cur.resetAnchor();
 918                 cur.message(from_utf8(N_("Mark on")));
 919                 break;
 920
 921         case LFUN_MARK_TOGGLE:
 922                 cur.clearSelection();
 923                 if (cur.mark()) {
 924                         cur.mark() = false;
 925                         cur.message(from_utf8(N_("Mark removed")));
 926                 } else {
 927                         cur.mark() = true;
 928                         cur.message(from_utf8(N_("Mark set")));
 929                 }
 930                 cur.resetAnchor();
 931                 break;
 932
 933         case LFUN_SCREEN_RECENTER:
 934                 center();
 935                 break;
 936
 937         case LFUN_BIBTEX_DATABASE_ADD: {
 938                 Cursor tmpcur = cursor_;
 939                 bv_funcs::findInset(tmpcur, Inset::BIBTEX_CODE, false);
 940                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 941                                                 Inset::BIBTEX_CODE);
 942                 if (inset) {
 943                         if (inset->addDatabase(to_utf8(cmd.argument())))
 944                                 buffer_->updateBibfilesCache();
 945                 }
 946                 break;
 947         }
 948
 949         case LFUN_BIBTEX_DATABASE_DEL: {
 950                 Cursor tmpcur = cursor_;
 951                 bv_funcs::findInset(tmpcur, Inset::BIBTEX_CODE, false);
 952                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 953                                                 Inset::BIBTEX_CODE);
 954                 if (inset) {
 955                         if (inset->delDatabase(to_utf8(cmd.argument())))
 956                                 buffer_->updateBibfilesCache();
 957                 }
 958                 break;
 959         }
 960
 961         case LFUN_WORDS_COUNT: {
 962                 DocIterator from, to;
 963                 if (cur.selection()) {
 964                         from = cur.selectionBegin();
 965                         to = cur.selectionEnd();
 966                 } else {
 967                         from = doc_iterator_begin(buffer_->inset());
 968                         to = doc_iterator_end(buffer_->inset());
 969                 }
 970                 int const count = countWords(from, to);
 971                 docstring message;
 972                 if (count != 1) {
 973                         if (cur.selection())
 974                                 message = bformat(_("%1$d words in selection."),
 975                                           count);
 976                                 else
 977                                         message = bformat(_("%1$d words in document."),
 978                                                           count);
 979                 }
 980                 else {
 981                         if (cur.selection())
 982                                 message = _("One word in selection.");
 983                         else
 984                                 message = _("One word in document.");
 985                 }
 986
 987                 Alert::information(_("Count words"), message);
 988         }
 989                 break;
 990
 991         case LFUN_BUFFER_TOGGLE_COMPRESSION:
 992                 // turn compression on/off
 993                 buffer_->params().compressed = !buffer_->params().compressed;
 994                 break;
 995
 996         case LFUN_NEXT_INSET_TOGGLE: {
 997                 // this is the real function we want to invoke
 998                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
 999                 // if there is an inset at cursor, see whether it
1000                 // wants to toggle.
1001                 Inset * inset = cur.nextInset();
1002                 if (inset && inset->isActive()) {
1003                         Cursor tmpcur = cur;
1004                         tmpcur.pushLeft(*inset);
1005                         inset->dispatch(tmpcur, tmpcmd);
1006                         if (tmpcur.result().dispatched()) {
1007                                 cur.dispatched();
1008                         }
1009                 }
1010                 // if it did not work, try the underlying inset.
1011                 if (!cur.result().dispatched())
1012                         cur.dispatch(tmpcmd);
1013
1014                 if (cur.result().dispatched())
1015                         cur.clearSelection();
1016
1017                 break;
1018         }
1019
1020         default:
1021                 updateFlags = Update::None;
1022         }
1023
1024         return updateFlags;
1025 }
1026
1027
1028 docstring const BufferView::requestSelection()
1029 {
1030         if (!buffer_)
1031                 return docstring();
1032
1033         Cursor & cur = cursor_;
1034
1035         if (!cur.selection()) {
1036                 xsel_cache_.set = false;
1037                 return docstring();
1038         }
1039
1040         if (!xsel_cache_.set ||
1041             cur.top() != xsel_cache_.cursor ||
1042             cur.anchor_.top() != xsel_cache_.anchor)
1043         {
1044                 xsel_cache_.cursor = cur.top();
1045                 xsel_cache_.anchor = cur.anchor_.top();
1046                 xsel_cache_.set = cur.selection();
1047                 return cur.selectionAsString(false);
1048         }
1049         return docstring();
1050 }
1051
1052
1053 void BufferView::clearSelection()
1054 {
1055         if (buffer_) {
1056                 cursor_.clearSelection();
1057                 // Clear the selection buffer. Otherwise a subsequent
1058                 // middle-mouse-button paste would use the selection buffer,
1059                 // not the more current external selection.
1060                 cap::clearSelection();
1061                 xsel_cache_.set = false;
1062                 // The buffer did not really change, but this causes the
1063                 // redraw we need because we cleared the selection above.
1064                 buffer_->changed();
1065         }
1066 }
1067
1068
1069 void BufferView::workAreaResize(int width, int height)
1070 {
1071         // Update from work area
1072         width_ = width;
1073         height_ = height;
1074
1075         // The complete text metrics will be redone.
1076         text_metrics_.clear();
1077
1078         if (buffer_)
1079                 resize();
1080 }
1081
1082
1083 Inset const * BufferView::getCoveringInset(Text const & text, int x, int y)
1084 {
1085         pit_type pit = text.getPitNearY(*this, y);
1086         BOOST_ASSERT(pit != -1);
1087         Paragraph const & par = text.getPar(pit);
1088
1089         LYXERR(Debug::DEBUG)
1090                 << BOOST_CURRENT_FUNCTION
1091                 << ": x: " << x
1092                 << " y: " << y
1093                 << "  pit: " << pit
1094                 << endl;
1095         InsetList::const_iterator iit = par.insetlist.begin();
1096         InsetList::const_iterator iend = par.insetlist.end();
1097         for (; iit != iend; ++iit) {
1098                 Inset * const inset = iit->inset;
1099                 if (inset->covers(*this, x, y)) {
1100                         if (!inset->descendable())
1101                                 // No need to go further down if the inset is not
1102                                 // descendable.
1103                                 return inset;
1104
1105                         size_t cell_number = inset->nargs();
1106                         // Check all the inner cell.
1107                         for (size_t i = 0; i != cell_number; ++i) {
1108                                 Text const * inner_text = inset->getText(i);
1109                                 if (inner_text) {
1110                                         // Try deeper.
1111                                         Inset const * inset_deeper =
1112                                                 getCoveringInset(*inner_text, x, y);
1113                                         if (inset_deeper)
1114                                                 return inset_deeper;
1115                                 }
1116                         }
1117
1118                         LYXERR(Debug::DEBUG)
1119                                 << BOOST_CURRENT_FUNCTION
1120                                 << ": Hit inset: " << inset << endl;
1121                         return inset;
1122                 }
1123         }
1124         LYXERR(Debug::DEBUG)
1125                 << BOOST_CURRENT_FUNCTION
1126                 << ": No inset hit. " << endl;
1127         return 0;
1128 }
1129
1130
1131 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
1132 {
1133         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1134
1135         // This is only called for mouse related events including
1136         // LFUN_FILE_OPEN generated by drag-and-drop.
1137         FuncRequest cmd = cmd0;
1138
1139         // E.g. Qt mouse press when no buffer
1140         if (!buffer_)
1141                 return false;
1142
1143         Cursor cur(*this);
1144         cur.push(buffer_->inset());
1145         cur.selection() = cursor_.selection();
1146
1147         // Either the inset under the cursor or the
1148         // surrounding Text will handle this event.
1149
1150         // make sure we stay within the screen...
1151         cmd.y = min(max(cmd.y, -1), height_);
1152
1153         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1154
1155                 // Get inset under mouse, if there is one.
1156                 Inset const * covering_inset =
1157                         getCoveringInset(buffer_->text(), cmd.x, cmd.y);
1158                 if (covering_inset == last_inset_)
1159                         // Same inset, no need to do anything...
1160                         return false;
1161
1162                 bool need_redraw = false;
1163                 // const_cast because of setMouseHover().
1164                 Inset * inset = const_cast<Inset *>(covering_inset);
1165                 if (last_inset_)
1166                         // Remove the hint on the last hovered inset (if any).
1167                         need_redraw |= last_inset_->setMouseHover(false);
1168                 if (inset)
1169                         // Highlighted the newly hovered inset (if any).
1170                         need_redraw |= inset->setMouseHover(true);
1171                 last_inset_ = inset;
1172
1173                 // if last metrics update was in singlepar mode, WorkArea::redraw() will
1174                 // not expose the button for redraw. We adjust here the metrics dimension
1175                 // to enable a full redraw.
1176                 // FIXME: It is possible to redraw only the area around the button!
1177                 if (need_redraw
1178                         && metrics_info_.update_strategy == SingleParUpdate) {
1179                         // FIXME: It should be possible to redraw only the area around
1180                         // the button by doing this:
1181                         //
1182                         //metrics_info_.singlepar = false;
1183                         //metrics_info_.y1 = ymin of button;
1184                         //metrics_info_.y2 = ymax of button;
1185                         //
1186                         // Unfortunately, rowpainter.cpp:paintText() does not distinguish
1187                         // between background updates and text updates. So we use the hammer
1188                         // solution for now. We could also avoid the updateMetrics() below
1189                         // by using the first and last pit of the CoordCache. Have a look
1190                         // at Text::getPitNearY() to see what I mean.
1191                         //
1192                         //metrics_info_.pit1 = first pit of CoordCache;
1193                         //metrics_info_.pit2 = last pit of CoordCache;
1194                         //metrics_info_.singlepar = false;
1195                         //metrics_info_.y1 = 0;
1196                         //metrics_info_.y2 = height_;
1197                         //
1198                         updateMetrics(false);
1199                 }
1200
1201                 // This event (moving without mouse click) is not passed further.
1202                 // This should be changed if it is further utilized.
1203                 return need_redraw;
1204         }
1205
1206         // Build temporary cursor.
1207         Inset * inset = buffer_->text().editXY(cur, cmd.x, cmd.y);
1208
1209         // Put anchor at the same position.
1210         cur.resetAnchor();
1211
1212         // Try to dispatch to an non-editable inset near this position
1213         // via the temp cursor. If the inset wishes to change the real
1214         // cursor it has to do so explicitly by using
1215         //  cur.bv().cursor() = cur;  (or similar)
1216         if (inset) {
1217                 inset->dispatch(cur, cmd);
1218         }
1219
1220         // Now dispatch to the temporary cursor. If the real cursor should
1221         // be modified, the inset's dispatch has to do so explicitly.
1222         if (!cur.result().dispatched())
1223                 cur.dispatch(cmd);
1224
1225         // Redraw if requested and necessary.
1226         if (cur.result().dispatched() && cur.result().update())
1227                 return update(cur.result().update());
1228
1229         return false;
1230 }
1231
1232
1233 void BufferView::scroll(int /*lines*/)
1234 {
1235 //      if (!buffer_)
1236 //              return;
1237 //
1238 //      Text const * t = &buffer_->text();
1239 //      int const line_height = defaultRowHeight();
1240 //
1241 //      // The new absolute coordinate
1242 //      int new_top_y = top_y() + lines * line_height;
1243 //
1244 //      // Restrict to a valid value
1245 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
1246 //      new_top_y = std::max(0, new_top_y);
1247 //
1248 //      scrollDocView(new_top_y);
1249 //
1250 }
1251
1252
1253 void BufferView::setCursorFromRow(int row)
1254 {
1255         int tmpid = -1;
1256         int tmppos = -1;
1257
1258         buffer_->texrow().getIdFromRow(row, tmpid, tmppos);
1259
1260         if (tmpid == -1)
1261                 buffer_->text().setCursor(cursor_, 0, 0);
1262         else
1263                 buffer_->text().setCursor(cursor_, buffer_->getParFromID(tmpid).pit(), tmppos);
1264 }
1265
1266
1267 void BufferView::gotoLabel(docstring const & label)
1268 {
1269         for (InsetIterator it = inset_iterator_begin(buffer_->inset()); it; ++it) {
1270                 vector<docstring> labels;
1271                 it->getLabelList(*buffer_, labels);
1272                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1273                         setCursor(it);
1274                         update();
1275                         return;
1276                 }
1277         }
1278 }
1279
1280
1281 TextMetrics const & BufferView::textMetrics(Text const * t) const
1282 {
1283         return const_cast<BufferView *>(this)->textMetrics(t);
1284 }
1285
1286
1287 TextMetrics & BufferView::textMetrics(Text const * t)
1288 {
1289         TextMetricsCache::iterator tmc_it  = text_metrics_.find(t);
1290         if (tmc_it == text_metrics_.end()) {
1291                 tmc_it = text_metrics_.insert(
1292                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
1293         }
1294         return tmc_it->second;
1295 }
1296
1297
1298 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
1299                 pit_type pit) const
1300 {
1301         return textMetrics(t).parMetrics(pit);
1302 }
1303
1304
1305 int BufferView::workHeight() const
1306 {
1307         return height_;
1308 }
1309
1310
1311 void BufferView::setCursor(DocIterator const & dit)
1312 {
1313         size_t const n = dit.depth();
1314         for (size_t i = 0; i < n; ++i)
1315                 dit[i].inset().edit(cursor_, true);
1316
1317         cursor_.setCursor(dit);
1318         cursor_.selection() = false;
1319 }
1320
1321
1322 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
1323 {
1324         // Would be wrong to delete anything if we have a selection.
1325         if (cur.selection())
1326                 return false;
1327
1328         bool need_anchor_change = false;
1329         bool changed = cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1330                 need_anchor_change);
1331
1332         if (need_anchor_change)
1333                 cur.resetAnchor();
1334
1335         if (!changed)
1336                 return false;
1337
1338         updateLabels(*buffer_);
1339
1340         updateMetrics(false);
1341         buffer_->changed();
1342         return true;
1343 }
1344
1345
1346 bool BufferView::mouseSetCursor(Cursor & cur)
1347 {
1348         BOOST_ASSERT(&cur.bv() == this);
1349
1350         // Has the cursor just left the inset?
1351         bool badcursor = false;
1352         bool leftinset = (&cursor_.inset() != &cur.inset());
1353         if (leftinset)
1354                 badcursor = cursor_.inset().notifyCursorLeaves(cursor_);
1355
1356         // do the dEPM magic if needed
1357         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
1358         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
1359         // the leftinset bool would not be necessary (badcursor instead).
1360         bool update = leftinset;
1361         if (!badcursor && cursor_.inTexted())
1362                 update |= checkDepm(cur, cursor_);
1363
1364         // if the cursor was in an empty script inset and the new
1365         // position is in the nucleus of the inset, notifyCursorLeaves
1366         // will kill the script inset itself. So we check all the
1367         // elements of the cursor to make sure that they are correct.
1368         // For an example, see bug 2933:
1369         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1370         // The code below could maybe be moved to a DocIterator method.
1371         //lyxerr << "cur before " << cur <<std::endl;
1372         DocIterator dit(cur.inset());
1373         dit.push_back(cur.bottom());
1374         size_t i = 1;
1375         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1376                 dit.push_back(cur[i]);
1377                 ++i;
1378         }
1379         //lyxerr << "5 cur after" << dit <<std::endl;
1380
1381         cursor_.setCursor(dit);
1382         cursor_.boundary(cur.boundary());
1383         cursor_.clearSelection();
1384         finishUndo();
1385         return update;
1386 }
1387
1388
1389 void BufferView::putSelectionAt(DocIterator const & cur,
1390                                 int length, bool backwards)
1391 {
1392         cursor_.clearSelection();
1393
1394         setCursor(cur);
1395
1396         if (length) {
1397                 if (backwards) {
1398                         cursor_.pos() += length;
1399                         cursor_.setSelection(cursor_, -length);
1400                 } else
1401                         cursor_.setSelection(cursor_, length);
1402                 cap::saveSelection(cursor_);
1403         }
1404 }
1405
1406
1407 Cursor & BufferView::cursor()
1408 {
1409         return cursor_;
1410 }
1411
1412
1413 Cursor const & BufferView::cursor() const
1414 {
1415         return cursor_;
1416 }
1417
1418
1419 pit_type BufferView::anchor_ref() const
1420 {
1421         return anchor_ref_;
1422 }
1423
1424
1425 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1426 {
1427         return metrics_info_;
1428 }
1429
1430
1431 // FIXME: We should split-up updateMetrics() for the singlepar case.
1432 void BufferView::updateMetrics(bool singlepar)
1433 {
1434         Text & buftext = buffer_->text();
1435         TextMetrics & tm = textMetrics(&buftext);
1436         pit_type size = int(buftext.paragraphs().size());
1437
1438         if (anchor_ref_ > int(buftext.paragraphs().size() - 1)) {
1439                 anchor_ref_ = int(buftext.paragraphs().size() - 1);
1440                 offset_ref_ = 0;
1441         }
1442
1443         if (!singlepar) {
1444                 // Clear out the position cache in case of full screen redraw,
1445                 coord_cache_.clear();
1446
1447                 // Clear out paragraph metrics to avoid having invalid metrics
1448                 // in the cache from paragraphs not relayouted below
1449                 tm.clear();
1450         }
1451
1452         // If the paragraph metrics has changed, we can not
1453         // use the singlepar optimisation.
1454         if (singlepar
1455                 // In Single Paragraph mode, rebreak only
1456                 // the (main text, not inset!) paragraph containing the cursor.
1457                 // (if this paragraph contains insets etc., rebreaking will
1458                 // recursively descend)
1459                 && tm.redoParagraph(cursor_.bottom().pit()))
1460                 singlepar = false;
1461
1462         pit_type const pit = anchor_ref_;
1463         int pit1 = pit;
1464         int pit2 = pit;
1465         size_t const npit = buftext.paragraphs().size();
1466
1467         // Rebreak anchor paragraph.
1468         if (!singlepar)
1469                 tm.redoParagraph(pit);
1470
1471         int y0 = tm.parMetrics(pit).ascent() - offset_ref_;
1472
1473         // Redo paragraphs above anchor if necessary.
1474         int y1 = y0;
1475         while (y1 > 0 && pit1 > 0) {
1476                 y1 -= tm.parMetrics(pit1).ascent();
1477                 --pit1;
1478                 if (!singlepar)
1479                         tm.redoParagraph(pit1);
1480                 y1 -= tm.parMetrics(pit1).descent();
1481         }
1482
1483
1484         // Take care of ascent of first line
1485         y1 -= tm.parMetrics(pit1).ascent();
1486
1487         // Normalize anchor for next time
1488         anchor_ref_ = pit1;
1489         offset_ref_ = -y1;
1490
1491         // Grey at the beginning is ugly
1492         if (pit1 == 0 && y1 > 0) {
1493                 y0 -= y1;
1494                 y1 = 0;
1495                 anchor_ref_ = 0;
1496         }
1497
1498         // Redo paragraphs below the anchor if necessary.
1499         int y2 = y0;
1500         while (y2 < height_ && pit2 < int(npit) - 1) {
1501                 y2 += tm.parMetrics(pit2).descent();
1502                 ++pit2;
1503                 if (!singlepar)
1504                         tm.redoParagraph(pit2);
1505                 y2 += tm.parMetrics(pit2).ascent();
1506         }
1507
1508         // Take care of descent of last line
1509         y2 += tm.parMetrics(pit2).descent();
1510
1511         // The coordinates of all these paragraphs are correct, cache them
1512         int y = y1;
1513         CoordCache::InnerParPosCache & parPos = coord_cache_.parPos()[&buftext];
1514         for (pit_type pit = pit1; pit <= pit2; ++pit) {
1515                 ParagraphMetrics const & pm = tm.parMetrics(pit);
1516                 y += pm.ascent();
1517                 parPos[pit] = Point(0, y);
1518                 if (singlepar && pit == cursor_.bottom().pit()) {
1519                         // In Single Paragraph mode, collect here the
1520                         // y1 and y2 of the (one) paragraph the cursor is in
1521                         y1 = y - pm.ascent();
1522                         y2 = y + pm.descent();
1523                 }
1524                 y += pm.descent();
1525         }
1526
1527         if (singlepar) {
1528                 // collect cursor paragraph iter bounds
1529                 pit1 = cursor_.bottom().pit();
1530                 pit2 = cursor_.bottom().pit();
1531         }
1532
1533         LYXERR(Debug::DEBUG)
1534                 << BOOST_CURRENT_FUNCTION
1535                 << " y1: " << y1
1536                 << " y2: " << y2
1537                 << " pit1: " << pit1
1538                 << " pit2: " << pit2
1539                 << " npit: " << npit
1540                 << " singlepar: " << singlepar
1541                 << "size: " << size
1542                 << endl;
1543
1544         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2,
1545                 singlepar? SingleParUpdate: FullScreenUpdate, size);
1546
1547         if (lyxerr.debugging(Debug::WORKAREA)) {
1548                 LYXERR(Debug::WORKAREA) << "BufferView::updateMetrics" << endl;
1549                 coord_cache_.dump();
1550         }
1551 }
1552
1553
1554 void BufferView::menuInsertLyXFile(string const & filenm)
1555 {
1556         BOOST_ASSERT(cursor_.inTexted());
1557         string filename = filenm;
1558
1559         if (filename.empty()) {
1560                 // Launch a file browser
1561                 // FIXME UNICODE
1562                 string initpath = lyxrc.document_path;
1563
1564                 if (buffer_) {
1565                         string const trypath = buffer_->filePath();
1566                         // If directory is writeable, use this as default.
1567                         if (isDirWriteable(FileName(trypath)))
1568                                 initpath = trypath;
1569                 }
1570
1571                 // FIXME UNICODE
1572                 FileDialog fileDlg(_("Select LyX document to insert"),
1573                         LFUN_FILE_INSERT,
1574                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1575                         make_pair(_("Examples|#E#e"),
1576                                     from_utf8(addPath(package().system_support().absFilename(),
1577                                     "examples"))));
1578
1579                 FileDialog::Result result =
1580                         fileDlg.open(from_utf8(initpath),
1581                                      FileFilterList(_("LyX Documents (*.lyx)")),
1582                                      docstring());
1583
1584                 if (result.first == FileDialog::Later)
1585                         return;
1586
1587                 // FIXME UNICODE
1588                 filename = to_utf8(result.second);
1589
1590                 // check selected filename
1591                 if (filename.empty()) {
1592                         // emit message signal.
1593                         message(_("Canceled."));
1594                         return;
1595                 }
1596         }
1597
1598         // Get absolute path of file and add ".lyx"
1599         // to the filename if necessary
1600         filename = fileSearch(string(), filename, "lyx").absFilename();
1601
1602         docstring const disp_fn = makeDisplayPath(filename);
1603         // emit message signal.
1604         message(bformat(_("Inserting document %1$s..."), disp_fn));
1605
1606         docstring res;
1607         Buffer buf("", false);
1608         if (lyx::loadLyXFile(&buf, FileName(filename))) {
1609                 ErrorList & el = buffer_->errorList("Parse");
1610                 // Copy the inserted document error list into the current buffer one.
1611                 el = buf.errorList("Parse");
1612                 recordUndo(cursor_);
1613                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1614                                              buf.params().textclass, el);
1615                 res = _("Document %1$s inserted.");
1616         } else
1617                 res = _("Could not insert document %1$s");
1618
1619         // emit message signal.
1620         message(bformat(res, disp_fn));
1621         buffer_->errors("Parse");
1622         resize();
1623 }
1624
1625 } // namespace lyx