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 "callback.h" // added for Dispatch functions
  25 #include "CoordCache.h"
  26 #include "CutAndPaste.h"
  27 #include "debug.h"
  28 #include "DispatchResult.h"
  29 #include "ErrorList.h"
  30 #include "factory.h"
  31 #include "FloatList.h"
  32 #include "FuncRequest.h"
  33 #include "FuncStatus.h"
  34 #include "gettext.h"
  35 #include "Intl.h"
  36 #include "InsetIterator.h"
  37 #include "Language.h"
  38 #include "LaTeXFeatures.h"
  39 #include "LyX.h"
  40 #include "lyxfind.h"
  41 #include "LyXFunc.h"
  42 #include "Layout.h"
  43 #include "LyXRC.h"
  44 #include "MetricsInfo.h"
  45 #include "Paragraph.h"
  46 #include "paragraph_funcs.h"
  47 #include "ParagraphParameters.h"
  48 #include "ParIterator.h"
  49 #include "Session.h"
  50 #include "TexRow.h"
  51 #include "Text.h"
  52 #include "TextClass.h"
  53 #include "toc.h"
  54 #include "Undo.h"
  55 #include "VSpace.h"
  56 #include "WordLangTuple.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 #include "frontends/Painter.h"
  67 #include "frontends/Selection.h"
  68
  69 #include "graphics/Previews.h"
  70
  71 #include "support/convert.h"
  72 #include "support/FileFilterList.h"
  73 #include "support/filetools.h"
  74 #include "support/Package.h"
  75 #include "support/types.h"
  76
  77 #include <boost/bind.hpp>
  78 #include <boost/current_function.hpp>
  79
  80 #include <functional>
  81 #include <vector>
  82
  83 using std::distance;
  84 using std::endl;
  85 using std::istringstream;
  86 using std::make_pair;
  87 using std::min;
  88 using std::max;
  89 using std::mem_fun_ref;
  90 using std::string;
  91 using std::vector;
  92
  93
  94 namespace lyx {
  95
  96 using support::addPath;
  97 using support::bformat;
  98 using support::FileFilterList;
  99 using support::FileName;
 100 using support::fileSearch;
 101 using support::isDirWriteable;
 102 using support::isFileReadable;
 103 using support::makeDisplayPath;
 104 using support::package;
 105
 106 namespace Alert = frontend::Alert;
 107
 108 namespace {
 109
 110 /// Return an inset of this class if it exists at the current cursor position
 111 template <class T>
 112 T * getInsetByCode(Cursor & cur, Inset::Code code)
 113 {
 114         T * inset = 0;
 115         DocIterator it = cur;
 116         if (it.nextInset() &&
 117             it.nextInset()->lyxCode() == code) {
 118                 inset = static_cast<T*>(it.nextInset());
 119         }
 120         return inset;
 121 }
 122
 123 } // anon namespace
 124
 125
 126 BufferView::BufferView(Buffer & buf)
 127         : width_(0), height_(0), buffer_(buf), wh_(0),
 128           cursor_(*this),
 129           multiparsel_cache_(false), anchor_ref_(0), offset_ref_(0),
 130           need_centering_(false), intl_(new Intl), last_inset_(0)
 131 {
 132         xsel_cache_.set = false;
 133         intl_->initKeyMapper(lyxrc.use_kbmap);
 134
 135         cursor_.push(buffer_.inset());
 136         cursor_.resetAnchor();
 137         cursor_.setCurrentFont();
 138
 139         if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 140                 graphics::Previews::get().generateBufferPreviews(buffer_);
 141 }
 142
 143
 144 BufferView::~BufferView()
 145 {
 146         // current buffer is going to be switched-off, save cursor pos
 147         // Ideally, the whole cursor stack should be saved, but session
 148         // currently can only handle bottom (whole document) level pit and pos.
 149         // That is to say, if a cursor is in a nested inset, it will be
 150         // restore to the left of the top level inset.
 151         LyX::ref().session().lastFilePos().save(
 152                 support::FileName(buffer_.fileName()),
 153                 boost::tie(cursor_.bottom().pit(), cursor_.bottom().pos()) );
 154 }
 155
 156
 157 Buffer & BufferView::buffer()
 158 {
 159         return buffer_;
 160 }
 161
 162
 163 Buffer const & BufferView::buffer() const
 164 {
 165         return buffer_;
 166 }
 167
 168
 169 bool BufferView::fitCursor()
 170 {
 171         if (bv_funcs::status(this, cursor_) == bv_funcs::CUR_INSIDE) {
 172                 frontend::FontMetrics const & fm =
 173                         theFontMetrics(cursor_.getFont());
 174                 int const asc = fm.maxAscent();
 175                 int const des = fm.maxDescent();
 176                 Point const p = bv_funcs::getPos(*this, cursor_, cursor_.boundary());
 177                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 178                         return false;
 179         }
 180         center();
 181         return true;
 182 }
 183
 184
 185 bool BufferView::multiParSel()
 186 {
 187         if (!cursor_.selection())
 188                 return false;
 189         bool ret = multiparsel_cache_;
 190         multiparsel_cache_ = cursor_.selBegin().pit() != cursor_.selEnd().pit();
 191         // Either this, or previous selection spans paragraphs
 192         return ret || multiparsel_cache_;
 193 }
 194
 195
 196 bool BufferView::update(Update::flags flags)
 197 {
 198         // last_inset_ points to the last visited inset. This pointer may become
 199         // invalid because of keyboard editing. Since all such operations
 200         // causes screen update(), I reset last_inset_ to avoid such a problem.
 201         last_inset_ = 0;
 202         // This is close to a hot-path.
 203         LYXERR(Debug::DEBUG)
 204                 << BOOST_CURRENT_FUNCTION
 205                 << "[fitcursor = " << (flags & Update::FitCursor)
 206                 << ", forceupdate = " << (flags & Update::Force)
 207                 << ", singlepar = " << (flags & Update::SinglePar)
 208                 << "]  buffer: " << &buffer_ << endl;
 209
 210         // Update macro store
 211         if (!(cursor().inMathed() && cursor().inMacroMode()))
 212                 buffer_.buildMacros();
 213
 214         // Now do the first drawing step if needed. This consists on updating
 215         // the CoordCache in updateMetrics().
 216         // The second drawing step is done in WorkArea::redraw() if needed.
 217
 218         // Case when no explicit update is requested.
 219         if (!flags) {
 220                 // no need to redraw anything.
 221                 metrics_info_.update_strategy = NoScreenUpdate;
 222                 return false;
 223         }
 224
 225         if (flags == Update::Decoration) {
 226                 metrics_info_.update_strategy = DecorationUpdate;
 227                 return true;
 228         }
 229
 230         if (flags == Update::FitCursor
 231                 || flags == (Update::Decoration | Update::FitCursor)) {
 232                 bool const fit_cursor = fitCursor();
 233                 // tell the frontend to update the screen if needed.
 234                 if (fit_cursor) {
 235                         updateMetrics(false);
 236                         return true;
 237                 }
 238                 if (flags & Update::Decoration) {
 239                         metrics_info_.update_strategy = DecorationUpdate;
 240                         return true;
 241                 }
 242                 // no screen update is needed.
 243                 metrics_info_.update_strategy = NoScreenUpdate;
 244                 return false;
 245         }
 246
 247         bool full_metrics = flags & Update::Force;
 248         if (flags & Update::MultiParSel)
 249                 full_metrics |= multiParSel();
 250
 251         bool const single_par = !full_metrics;
 252         updateMetrics(single_par);
 253
 254         if (flags & Update::FitCursor) {
 255                 //FIXME: updateMetrics() does not update paragraph position
 256                 // This is done at draw() time. So we need a redraw!
 257                 buffer_.changed();
 258                 if (fitCursor())
 259                         updateMetrics(false);
 260                 else
 261                         // The screen has already been updated thanks to the
 262                         // 'buffer_.changed()' call three line above. So no need
 263                         // to redraw again.
 264                         return false;
 265         }
 266
 267         // tell the frontend to update the screen.
 268         return true;
 269 }
 270
 271
 272 void BufferView::updateScrollbar()
 273 {
 274         Text & t = buffer_.text();
 275         TextMetrics & tm = text_metrics_[&t];
 276
 277         int const parsize = int(t.paragraphs().size() - 1);
 278         if (anchor_ref_ >  parsize)  {
 279                 anchor_ref_ = parsize;
 280                 offset_ref_ = 0;
 281         }
 282
 283         LYXERR(Debug::GUI)
 284                 << BOOST_CURRENT_FUNCTION
 285                 << " Updating scrollbar: height: " << t.paragraphs().size()
 286                 << " curr par: " << cursor_.bottom().pit()
 287                 << " default height " << defaultRowHeight() << endl;
 288
 289         // It would be better to fix the scrollbar to understand
 290         // values in [0..1] and divide everything by wh
 291
 292         // estimated average paragraph height:
 293         if (wh_ == 0)
 294                 wh_ = height_ / 4;
 295
 296         int h = tm.parMetrics(anchor_ref_).height();
 297
 298         // Normalize anchor/offset (MV):
 299         while (offset_ref_ > h && anchor_ref_ < parsize) {
 300                 anchor_ref_++;
 301                 offset_ref_ -= h;
 302                 h = tm.parMetrics(anchor_ref_).height();
 303         }
 304         // Look at paragraph heights on-screen
 305         int sumh = 0;
 306         int nh = 0;
 307         for (pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 308                 if (sumh > height_)
 309                         break;
 310                 int const h2 = tm.parMetrics(pit).height();
 311                 sumh += h2;
 312                 nh++;
 313         }
 314
 315         BOOST_ASSERT(nh);
 316         int const hav = sumh / nh;
 317         // More realistic average paragraph height
 318         if (hav > wh_)
 319                 wh_ = hav;
 320
 321         BOOST_ASSERT(h);
 322         scrollbarParameters_.height = (parsize + 1) * wh_;
 323         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 324         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 325 }
 326
 327
 328 ScrollbarParameters const & BufferView::scrollbarParameters() const
 329 {
 330         return scrollbarParameters_;
 331 }
 332
 333
 334 void BufferView::scrollDocView(int value)
 335 {
 336         LYXERR(Debug::GUI) << BOOST_CURRENT_FUNCTION
 337                            << "[ value = " << value << "]" << endl;
 338
 339         Text & t = buffer_.text();
 340         TextMetrics & tm = text_metrics_[&t];
 341
 342         float const bar = value / float(wh_ * t.paragraphs().size());
 343
 344         anchor_ref_ = int(bar * t.paragraphs().size());
 345         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 346                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 347
 348         tm.redoParagraph(anchor_ref_);
 349         int const h = tm.parMetrics(anchor_ref_).height();
 350         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 351         updateMetrics(false);
 352         buffer_.changed();
 353 }
 354
 355
 356 void BufferView::setCursorFromScrollbar()
 357 {
 358         TextMetrics & tm = text_metrics_[&buffer_.text()];
 359
 360         int const height = 2 * defaultRowHeight();
 361         int const first = height;
 362         int const last = height_ - height;
 363         Cursor & cur = cursor_;
 364
 365         bv_funcs::CurStatus st = bv_funcs::status(this, cur);
 366
 367         switch (st) {
 368         case bv_funcs::CUR_ABOVE:
 369                 // We reset the cursor because bv_funcs::status() does not
 370                 // work when the cursor is within mathed.
 371                 cur.reset(buffer_.inset());
 372                 tm.setCursorFromCoordinates(cur, 0, first);
 373                 cur.clearSelection();
 374                 break;
 375         case bv_funcs::CUR_BELOW:
 376                 // We reset the cursor because bv_funcs::status() does not
 377                 // work when the cursor is within mathed.
 378                 cur.reset(buffer_.inset());
 379                 tm.setCursorFromCoordinates(cur, 0, last);
 380                 cur.clearSelection();
 381                 break;
 382         case bv_funcs::CUR_INSIDE:
 383                 int const y = bv_funcs::getPos(*this, cur, cur.boundary()).y_;
 384                 int const newy = min(last, max(y, first));
 385                 if (y != newy) {
 386                         cur.reset(buffer_.inset());
 387                         tm.setCursorFromCoordinates(cur, 0, newy);
 388                 }
 389         }
 390 }
 391
 392
 393 Change const BufferView::getCurrentChange() const
 394 {
 395         if (!cursor_.selection())
 396                 return Change(Change::UNCHANGED);
 397
 398         DocIterator dit = cursor_.selectionBegin();
 399         return dit.paragraph().lookupChange(dit.pos());
 400 }
 401
 402
 403 void BufferView::saveBookmark(unsigned int idx)
 404 {
 405         // tenatively save bookmark, id and pos will be used to
 406         // acturately locate a bookmark in a 'live' lyx session.
 407         // pit and pos will be updated with bottom level pit/pos
 408         // when lyx exits.
 409         LyX::ref().session().bookmarks().save(
 410                 FileName(buffer_.fileName()),
 411                 cursor_.bottom().pit(),
 412                 cursor_.bottom().pos(),
 413                 cursor_.paragraph().id(),
 414                 cursor_.pos(),
 415                 idx
 416         );
 417         if (idx)
 418                 // emit message signal.
 419                 message(_("Save bookmark"));
 420 }
 421
 422
 423 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 424         int top_id, pos_type top_pos)
 425 {
 426         bool success = false;
 427         DocIterator doc_it;
 428
 429         cursor_.clearSelection();
 430
 431         // if a valid par_id is given, try it first
 432         // This is the case for a 'live' bookmark when unique paragraph ID
 433         // is used to track bookmarks.
 434         if (top_id > 0) {
 435                 ParIterator par = buffer_.getParFromID(top_id);
 436                 if (par != buffer_.par_iterator_end()) {
 437                         doc_it = makeDocIterator(par, min(par->size(), top_pos));
 438                         // Some slices of the iterator may not be
 439                         // reachable (e.g. closed collapsable inset)
 440                         // so the dociterator may need to be
 441                         // shortened. Otherwise, setCursor may crash
 442                         // lyx when the cursor can not be set to these
 443                         // insets.
 444                         size_t const n = doc_it.depth();
 445                         for (size_t i = 0; i < n; ++i)
 446                                 if (doc_it[i].inset().editable() != Inset::HIGHLY_EDITABLE) {
 447                                         doc_it.resize(i);
 448                                         break;
 449                                 }
 450                         success = true;
 451                 }
 452         }
 453
 454         // if top_id == 0, or searching through top_id failed
 455         // This is the case for a 'restored' bookmark when only bottom
 456         // (document level) pit was saved. Because of this, bookmark
 457         // restoration is inaccurate. If a bookmark was within an inset,
 458         // it will be restored to the left of the outmost inset that contains
 459         // the bookmark.
 460         if (static_cast<size_t>(bottom_pit) < buffer_.paragraphs().size()) {
 461                 doc_it = doc_iterator_begin(buffer_.inset());
 462                 doc_it.pit() = bottom_pit;
 463                 doc_it.pos() = min(bottom_pos, doc_it.paragraph().size());
 464                 success = true;
 465         }
 466
 467         if (success) {
 468                 // Note: only bottom (document) level pit is set.
 469                 setCursor(doc_it);
 470                 // set the current font.
 471                 cursor_.setCurrentFont();
 472                 // center the screen on this new position.
 473                 center();
 474         }
 475
 476         return success;
 477 }
 478
 479
 480 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 481 {
 482         if (lyxrc.rtl_support) {
 483                 if (cursor_.real_current_font.isRightToLeft()) {
 484                         if (intl_->keymap == Intl::PRIMARY)
 485                                 intl_->keyMapSec();
 486                 } else {
 487                         if (intl_->keymap == Intl::SECONDARY)
 488                                 intl_->keyMapPrim();
 489                 }
 490         }
 491
 492         intl_->getTransManager().translateAndInsert(c, t, cur);
 493 }
 494
 495
 496 int BufferView::workWidth() const
 497 {
 498         return width_;
 499 }
 500
 501
 502 void BufferView::updateOffsetRef()
 503 {
 504         // No need to update offset_ref_ in this case.
 505         if (!need_centering_)
 506                 return;
 507
 508         // We are not properly started yet, delay until resizing is
 509         // done.
 510         if (height_ == 0)
 511                 return;
 512
 513         CursorSlice & bot = cursor_.bottom();
 514         TextMetrics & tm = text_metrics_[bot.text()];
 515         ParagraphMetrics const & pm = tm.parMetrics(bot.pit());
 516         Point p = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary());
 517         offset_ref_ = p.y_ + pm.ascent() - height_ / 2;
 518
 519         need_centering_ = false;
 520 }
 521
 522
 523 void BufferView::center()
 524 {
 525         anchor_ref_ = cursor_.bottom().pit();
 526         need_centering_ = true;
 527 }
 528
 529
 530 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 531 {
 532         FuncStatus flag;
 533
 534         Cursor & cur = cursor_;
 535
 536         switch (cmd.action) {
 537
 538         case LFUN_UNDO:
 539                 flag.enabled(!buffer_.undostack().empty());
 540                 break;
 541         case LFUN_REDO:
 542                 flag.enabled(!buffer_.redostack().empty());
 543                 break;
 544         case LFUN_FILE_INSERT:
 545         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 546         case LFUN_FILE_INSERT_PLAINTEXT:
 547         case LFUN_BOOKMARK_SAVE:
 548                 // FIXME: Actually, these LFUNS should be moved to Text
 549                 flag.enabled(cur.inTexted());
 550                 break;
 551         case LFUN_FONT_STATE:
 552         case LFUN_LABEL_INSERT:
 553         case LFUN_PARAGRAPH_GOTO:
 554         // FIXME handle non-trivially
 555         case LFUN_OUTLINE_UP:
 556         case LFUN_OUTLINE_DOWN:
 557         case LFUN_OUTLINE_IN:
 558         case LFUN_OUTLINE_OUT:
 559         case LFUN_NOTE_NEXT:
 560         case LFUN_REFERENCE_NEXT:
 561         case LFUN_WORD_FIND:
 562         case LFUN_WORD_REPLACE:
 563         case LFUN_MARK_OFF:
 564         case LFUN_MARK_ON:
 565         case LFUN_MARK_TOGGLE:
 566         case LFUN_SCREEN_RECENTER:
 567         case LFUN_BIBTEX_DATABASE_ADD:
 568         case LFUN_BIBTEX_DATABASE_DEL:
 569         case LFUN_WORDS_COUNT:
 570         case LFUN_NEXT_INSET_TOGGLE:
 571                 flag.enabled(true);
 572                 break;
 573
 574         case LFUN_LABEL_GOTO: {
 575                 flag.enabled(!cmd.argument().empty()
 576                     || getInsetByCode<InsetRef>(cur, Inset::REF_CODE));
 577                 break;
 578         }
 579
 580         case LFUN_CHANGES_TRACK:
 581                 flag.enabled(true);
 582                 flag.setOnOff(buffer_.params().trackChanges);
 583                 break;
 584
 585         case LFUN_CHANGES_OUTPUT:
 586                 flag.enabled(true);
 587                 flag.setOnOff(buffer_.params().outputChanges);
 588                 break;
 589
 590         case LFUN_CHANGES_MERGE:
 591         case LFUN_CHANGE_NEXT:
 592         case LFUN_ALL_CHANGES_ACCEPT:
 593         case LFUN_ALL_CHANGES_REJECT:
 594                 // TODO: context-sensitive enabling of LFUNs
 595                 // In principle, these command should only be enabled if there
 596                 // is a change in the document. However, without proper
 597                 // optimizations, this will inevitably result in poor performance.
 598                 flag.enabled(true);
 599                 break;
 600
 601         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 602                 flag.setOnOff(buffer_.params().compressed);
 603                 break;
 604         }
 605
 606         case LFUN_SCREEN_UP:
 607         case LFUN_SCREEN_DOWN:
 608                 flag.enabled(true);
 609                 break;
 610
 611         // FIXME: LFUN_SCREEN_DOWN_SELECT should be removed from
 612         // everywhere else before this can enabled:
 613         case LFUN_SCREEN_UP_SELECT:
 614         case LFUN_SCREEN_DOWN_SELECT:
 615                 flag.enabled(false);
 616                 break;
 617
 618         default:
 619                 flag.enabled(false);
 620         }
 621
 622         return flag;
 623 }
 624
 625
 626 Update::flags BufferView::dispatch(FuncRequest const & cmd)
 627 {
 628         //lyxerr << BOOST_CURRENT_FUNCTION
 629         //       << [ cmd = " << cmd << "]" << endl;
 630
 631         // Make sure that the cached BufferView is correct.
 632         LYXERR(Debug::ACTION) << BOOST_CURRENT_FUNCTION
 633                 << " action[" << cmd.action << ']'
 634                 << " arg[" << to_utf8(cmd.argument()) << ']'
 635                 << " x[" << cmd.x << ']'
 636                 << " y[" << cmd.y << ']'
 637                 << " button[" << cmd.button() << ']'
 638                 << endl;
 639
 640         Cursor & cur = cursor_;
 641         // Default Update flags.
 642         Update::flags updateFlags = Update::Force | Update::FitCursor;
 643
 644         switch (cmd.action) {
 645
 646         case LFUN_UNDO:
 647                 cur.message(_("Undo"));
 648                 cur.clearSelection();
 649                 if (!textUndo(*this)) {
 650                         cur.message(_("No further undo information"));
 651                         updateFlags = Update::None;
 652                 }
 653                 break;
 654
 655         case LFUN_REDO:
 656                 cur.message(_("Redo"));
 657                 cur.clearSelection();
 658                 if (!textRedo(*this)) {
 659                         cur.message(_("No further redo information"));
 660                         updateFlags = Update::None;
 661                 }
 662                 break;
 663
 664         case LFUN_FILE_INSERT:
 665                 // FIXME UNICODE
 666                 menuInsertLyXFile(to_utf8(cmd.argument()));
 667                 break;
 668
 669         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 670                 // FIXME UNICODE
 671                 insertPlaintextFile(this, to_utf8(cmd.argument()), true);
 672                 break;
 673
 674         case LFUN_FILE_INSERT_PLAINTEXT:
 675                 // FIXME UNICODE
 676                 insertPlaintextFile(this, to_utf8(cmd.argument()), false);
 677                 break;
 678
 679         case LFUN_FONT_STATE:
 680                 cur.message(cur.currentState());
 681                 break;
 682
 683         case LFUN_BOOKMARK_SAVE:
 684                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 685                 break;
 686
 687         case LFUN_LABEL_GOTO: {
 688                 docstring label = cmd.argument();
 689                 if (label.empty()) {
 690                         InsetRef * inset =
 691                                 getInsetByCode<InsetRef>(cursor_,
 692                                                          Inset::REF_CODE);
 693                         if (inset) {
 694                                 label = inset->getParam("reference");
 695                                 // persistent=false: use temp_bookmark
 696                                 saveBookmark(0);
 697                         }
 698                 }
 699
 700                 if (!label.empty())
 701                         gotoLabel(label);
 702                 break;
 703         }
 704
 705         case LFUN_PARAGRAPH_GOTO: {
 706                 int const id = convert<int>(to_utf8(cmd.argument()));
 707                 int i = 0;
 708                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
 709                         b = theBufferList().next(b)) {
 710
 711                         ParIterator par = b->getParFromID(id);
 712                         if (par == b->par_iterator_end()) {
 713                                 LYXERR(Debug::INFO)
 714                                         << "No matching paragraph found! ["
 715                                         << id << "]." << endl;
 716                         } else {
 717                                 LYXERR(Debug::INFO)
 718                                         << "Paragraph " << par->id()
 719                                         << " found in buffer `"
 720                                         << b->fileName() << "'." << endl;
 721
 722                                 if (b == &buffer_) {
 723                                         // Set the cursor
 724                                         setCursor(makeDocIterator(par, 0));
 725                                 } else {
 726                                         // Switch to other buffer view and resend cmd
 727                                         theLyXFunc().dispatch(FuncRequest(
 728                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 729                                         theLyXFunc().dispatch(cmd);
 730                                         updateFlags = Update::None;
 731                                 }
 732                                 break;
 733                         }
 734                         ++i;
 735                 }
 736                 break;
 737         }
 738
 739         case LFUN_OUTLINE_UP:
 740                 toc::outline(toc::Up, cursor_);
 741                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 742                 updateLabels(buffer_);
 743                 break;
 744         case LFUN_OUTLINE_DOWN:
 745                 toc::outline(toc::Down, cursor_);
 746                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 747                 updateLabels(buffer_);
 748                 break;
 749         case LFUN_OUTLINE_IN:
 750                 toc::outline(toc::In, cursor_);
 751                 updateLabels(buffer_);
 752                 break;
 753         case LFUN_OUTLINE_OUT:
 754                 toc::outline(toc::Out, cursor_);
 755                 updateLabels(buffer_);
 756                 break;
 757
 758         case LFUN_NOTE_NEXT:
 759                 bv_funcs::gotoInset(this, Inset::NOTE_CODE, false);
 760                 break;
 761
 762         case LFUN_REFERENCE_NEXT: {
 763                 vector<Inset_code> tmp;
 764                 tmp.push_back(Inset::LABEL_CODE);
 765                 tmp.push_back(Inset::REF_CODE);
 766                 bv_funcs::gotoInset(this, tmp, true);
 767                 break;
 768         }
 769
 770         case LFUN_CHANGES_TRACK:
 771                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
 772                 break;
 773
 774         case LFUN_CHANGES_OUTPUT:
 775                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
 776                 if (buffer_.params().outputChanges) {
 777                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
 778                         bool xcolorsoul = LaTeXFeatures::isAvailable("soul") &&
 779                                           LaTeXFeatures::isAvailable("xcolor");
 780
 781                         if (!dvipost && !xcolorsoul) {
 782                                 Alert::warning(_("Changes not shown in LaTeX output"),
 783                                                _("Changes will not be highlighted in LaTeX output, "
 784                                                  "because neither dvipost nor xcolor/soul are installed.\n"
 785                                                  "Please install these packages or redefine "
 786                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
 787                         } else if (!xcolorsoul) {
 788                                 Alert::warning(_("Changes not shown in LaTeX output"),
 789                                                _("Changes will not be highlighted in LaTeX output "
 790                                                  "when using pdflatex, because xcolor and soul are not installed.\n"
 791                                                  "Please install both packages or redefine "
 792                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
 793                         }
 794                 }
 795                 break;
 796
 797         case LFUN_CHANGE_NEXT:
 798                 findNextChange(this);
 799                 break;
 800
 801         case LFUN_CHANGES_MERGE:
 802                 if (findNextChange(this))
 803                         showDialog("changes");
 804                 break;
 805
 806         case LFUN_ALL_CHANGES_ACCEPT:
 807                 // select complete document
 808                 cursor_.reset(buffer_.inset());
 809                 cursor_.selHandle(true);
 810                 buffer_.text().cursorBottom(cursor_);
 811                 // accept everything in a single step to support atomic undo
 812                 buffer_.text().acceptOrRejectChanges(cursor_, Text::ACCEPT);
 813                 break;
 814
 815         case LFUN_ALL_CHANGES_REJECT:
 816                 // select complete document
 817                 cursor_.reset(buffer_.inset());
 818                 cursor_.selHandle(true);
 819                 buffer_.text().cursorBottom(cursor_);
 820                 // reject everything in a single step to support atomic undo
 821                 // Note: reject does not work recursively; the user may have to repeat the operation
 822                 buffer_.text().acceptOrRejectChanges(cursor_, Text::REJECT);
 823                 break;
 824
 825         case LFUN_WORD_FIND:
 826                 find(this, cmd);
 827                 break;
 828
 829         case LFUN_WORD_REPLACE: {
 830                 bool has_deleted = false;
 831                 if (cur.selection()) {
 832                         DocIterator beg = cur.selectionBegin();
 833                         DocIterator end = cur.selectionEnd();
 834                         if (beg.pit() == end.pit()) {
 835                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
 836                                         if (cur.paragraph().isDeleted(p))
 837                                                 has_deleted = true;
 838                                 }
 839                         }
 840                 }
 841                 replace(this, cmd, has_deleted);
 842                 break;
 843         }
 844
 845         case LFUN_MARK_OFF:
 846                 cur.clearSelection();
 847                 cur.resetAnchor();
 848                 cur.message(from_utf8(N_("Mark off")));
 849                 break;
 850
 851         case LFUN_MARK_ON:
 852                 cur.clearSelection();
 853                 cur.mark() = true;
 854                 cur.resetAnchor();
 855                 cur.message(from_utf8(N_("Mark on")));
 856                 break;
 857
 858         case LFUN_MARK_TOGGLE:
 859                 cur.clearSelection();
 860                 if (cur.mark()) {
 861                         cur.mark() = false;
 862                         cur.message(from_utf8(N_("Mark removed")));
 863                 } else {
 864                         cur.mark() = true;
 865                         cur.message(from_utf8(N_("Mark set")));
 866                 }
 867                 cur.resetAnchor();
 868                 break;
 869
 870         case LFUN_SCREEN_RECENTER:
 871                 center();
 872                 break;
 873
 874         case LFUN_BIBTEX_DATABASE_ADD: {
 875                 Cursor tmpcur = cursor_;
 876                 bv_funcs::findInset(tmpcur, Inset::BIBTEX_CODE, false);
 877                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 878                                                 Inset::BIBTEX_CODE);
 879                 if (inset) {
 880                         if (inset->addDatabase(to_utf8(cmd.argument())))
 881                                 buffer_.updateBibfilesCache();
 882                 }
 883                 break;
 884         }
 885
 886         case LFUN_BIBTEX_DATABASE_DEL: {
 887                 Cursor tmpcur = cursor_;
 888                 bv_funcs::findInset(tmpcur, Inset::BIBTEX_CODE, false);
 889                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 890                                                 Inset::BIBTEX_CODE);
 891                 if (inset) {
 892                         if (inset->delDatabase(to_utf8(cmd.argument())))
 893                                 buffer_.updateBibfilesCache();
 894                 }
 895                 break;
 896         }
 897
 898         case LFUN_WORDS_COUNT: {
 899                 DocIterator from, to;
 900                 if (cur.selection()) {
 901                         from = cur.selectionBegin();
 902                         to = cur.selectionEnd();
 903                 } else {
 904                         from = doc_iterator_begin(buffer_.inset());
 905                         to = doc_iterator_end(buffer_.inset());
 906                 }
 907                 int const count = countWords(from, to);
 908                 docstring message;
 909                 if (count != 1) {
 910                         if (cur.selection())
 911                                 message = bformat(_("%1$d words in selection."),
 912                                           count);
 913                                 else
 914                                         message = bformat(_("%1$d words in document."),
 915                                                           count);
 916                 }
 917                 else {
 918                         if (cur.selection())
 919                                 message = _("One word in selection.");
 920                         else
 921                                 message = _("One word in document.");
 922                 }
 923
 924                 Alert::information(_("Count words"), message);
 925         }
 926                 break;
 927
 928         case LFUN_BUFFER_TOGGLE_COMPRESSION:
 929                 // turn compression on/off
 930                 buffer_.params().compressed = !buffer_.params().compressed;
 931                 break;
 932
 933         case LFUN_NEXT_INSET_TOGGLE: {
 934                 // this is the real function we want to invoke
 935                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
 936                 // if there is an inset at cursor, see whether it
 937                 // wants to toggle.
 938                 Inset * inset = cur.nextInset();
 939                 if (inset) {
 940                         if (inset->isActive()) {
 941                                 Cursor tmpcur = cur;
 942                                 tmpcur.pushLeft(*inset);
 943                                 inset->dispatch(tmpcur, tmpcmd);
 944                                 if (tmpcur.result().dispatched()) {
 945                                         cur.dispatched();
 946                                 }
 947                         } else if (inset->editable() == Inset::IS_EDITABLE) {
 948                                 inset->edit(cur, true);
 949                         }
 950                 }
 951                 // if it did not work, try the underlying inset.
 952                 if (!cur.result().dispatched())
 953                         cur.dispatch(tmpcmd);
 954
 955                 if (cur.result().dispatched())
 956                         cur.clearSelection();
 957
 958                 break;
 959         }
 960
 961         case LFUN_SCREEN_UP:
 962         case LFUN_SCREEN_DOWN: {
 963                 Point p = bv_funcs::getPos(*this, cur, cur.boundary());
 964                 if (p.y_ < 0 || p.y_ > height_) {
 965                         // The cursor is off-screen so recenter before proceeding.
 966                         center();
 967                         updateMetrics(false);
 968                         //FIXME: updateMetrics() does not update paragraph position
 969                         // This is done at draw() time. So we need a redraw!
 970                         buffer_.changed();
 971                         p = bv_funcs::getPos(*this, cur, cur.boundary());
 972                 }
 973                 scroll(cmd.action == LFUN_SCREEN_UP? - height_ : height_);
 974                 cur.reset(buffer_.inset());
 975                 text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_);
 976                 //FIXME: what to do with cur.x_target()?
 977                 finishUndo();
 978                 // The metrics are already up to date. see scroll()
 979                 updateFlags = Update::None;
 980                 break;
 981         }
 982
 983         case LFUN_SCREEN_UP_SELECT:
 984         case LFUN_SCREEN_DOWN_SELECT: {
 985                 cur.selHandle(true);
 986                 size_t initial_depth = cur.depth();
 987                 Point const p = bv_funcs::getPos(*this, cur, cur.boundary());
 988                 scroll(cmd.action == LFUN_SCREEN_UP_SELECT? - height_ : height_);
 989                 // FIXME: We need to verify if the cursor stayed within an inset...
 990                 //cur.reset(buffer_.inset());
 991                 text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_);
 992                 finishUndo();
 993                 while (cur.depth() > initial_depth) {
 994                         cur.forwardInset();
 995                 }
 996                 // FIXME: we need to do a redraw again because of the selection
 997                 buffer_.changed();
 998                 updateFlags = Update::Force | Update::FitCursor;
 999                 break;
1000         }
1001
1002         default:
1003                 updateFlags = Update::None;
1004         }
1005
1006         return updateFlags;
1007 }
1008
1009
1010 docstring const BufferView::requestSelection()
1011 {
1012         Cursor & cur = cursor_;
1013
1014         if (!cur.selection()) {
1015                 xsel_cache_.set = false;
1016                 return docstring();
1017         }
1018
1019         if (!xsel_cache_.set ||
1020             cur.top() != xsel_cache_.cursor ||
1021             cur.anchor_.top() != xsel_cache_.anchor)
1022         {
1023                 xsel_cache_.cursor = cur.top();
1024                 xsel_cache_.anchor = cur.anchor_.top();
1025                 xsel_cache_.set = cur.selection();
1026                 return cur.selectionAsString(false);
1027         }
1028         return docstring();
1029 }
1030
1031
1032 void BufferView::clearSelection()
1033 {
1034         cursor_.clearSelection();
1035         // Clear the selection buffer. Otherwise a subsequent
1036         // middle-mouse-button paste would use the selection buffer,
1037         // not the more current external selection.
1038         cap::clearSelection();
1039         xsel_cache_.set = false;
1040         // The buffer did not really change, but this causes the
1041         // redraw we need because we cleared the selection above.
1042         buffer_.changed();
1043 }
1044
1045
1046 void BufferView::resize(int width, int height)
1047 {
1048         // Update from work area
1049         width_ = width;
1050         height_ = height;
1051
1052         updateMetrics(false);
1053 }
1054
1055
1056 Inset const * BufferView::getCoveringInset(Text const & text, int x, int y)
1057 {
1058         TextMetrics & tm = text_metrics_[&text];
1059         Inset * inset = tm.checkInsetHit(x, y);
1060         if (!inset)
1061                 return 0;
1062
1063         if (!inset->descendable())
1064                 // No need to go further down if the inset is not
1065                 // descendable.
1066                 return inset;
1067
1068         size_t cell_number = inset->nargs();
1069         // Check all the inner cell.
1070         for (size_t i = 0; i != cell_number; ++i) {
1071                 Text const * inner_text = inset->getText(i);
1072                 if (inner_text) {
1073                         // Try deeper.
1074                         Inset const * inset_deeper =
1075                                 getCoveringInset(*inner_text, x, y);
1076                         if (inset_deeper)
1077                                 return inset_deeper;
1078                 }
1079         }
1080
1081         return inset;
1082 }
1083
1084
1085 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
1086 {
1087         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1088
1089         // This is only called for mouse related events including
1090         // LFUN_FILE_OPEN generated by drag-and-drop.
1091         FuncRequest cmd = cmd0;
1092
1093         Cursor cur(*this);
1094         cur.push(buffer_.inset());
1095         cur.selection() = cursor_.selection();
1096
1097         // Either the inset under the cursor or the
1098         // surrounding Text will handle this event.
1099
1100         // make sure we stay within the screen...
1101         cmd.y = min(max(cmd.y, -1), height_);
1102
1103         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1104
1105                 // Get inset under mouse, if there is one.
1106                 Inset const * covering_inset =
1107                         getCoveringInset(buffer_.text(), cmd.x, cmd.y);
1108                 if (covering_inset == last_inset_)
1109                         // Same inset, no need to do anything...
1110                         return false;
1111
1112                 bool need_redraw = false;
1113                 // const_cast because of setMouseHover().
1114                 Inset * inset = const_cast<Inset *>(covering_inset);
1115                 if (last_inset_)
1116                         // Remove the hint on the last hovered inset (if any).
1117                         need_redraw |= last_inset_->setMouseHover(false);
1118                 if (inset)
1119                         // Highlighted the newly hovered inset (if any).
1120                         need_redraw |= inset->setMouseHover(true);
1121                 last_inset_ = inset;
1122                 if (!need_redraw)
1123                         return false;
1124
1125                 // if last metrics update was in singlepar mode, WorkArea::redraw() will
1126                 // not expose the button for redraw. We adjust here the metrics dimension
1127                 // to enable a full redraw in any case as this is not costly.
1128                 TextMetrics & tm = text_metrics_[&buffer_.text()];
1129                 std::pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
1130                 std::pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
1131                 int y1 = firstpm.second->position() - firstpm.second->ascent();
1132                 int y2 = lastpm.second->position() + lastpm.second->descent();
1133                 metrics_info_ = ViewMetricsInfo(firstpm.first, lastpm.first, y1, y2,
1134                         FullScreenUpdate, buffer_.text().paragraphs().size());
1135                 // Reinitialize anchor to first pit.
1136                 anchor_ref_ = firstpm.first;
1137                 offset_ref_ = -y1;
1138                 LYXERR(Debug::PAINTING)
1139                         << "Mouse hover detected at: (" << cmd.x << ", " << cmd.y << ")"
1140                         << "\nTriggering redraw: y1: " << y1 << " y2: " << y2
1141                         << " pit1: " << firstpm.first << " pit2: " << lastpm.first << endl;
1142
1143                 // This event (moving without mouse click) is not passed further.
1144                 // This should be changed if it is further utilized.
1145                 return true;
1146         }
1147
1148         // Build temporary cursor.
1149         Inset * inset = text_metrics_[&buffer_.text()].editXY(cur, cmd.x, cmd.y);
1150
1151         // Put anchor at the same position.
1152         cur.resetAnchor();
1153
1154         // Try to dispatch to an non-editable inset near this position
1155         // via the temp cursor. If the inset wishes to change the real
1156         // cursor it has to do so explicitly by using
1157         //  cur.bv().cursor() = cur;  (or similar)
1158         if (inset) {
1159                 inset->dispatch(cur, cmd);
1160         }
1161
1162         // Now dispatch to the temporary cursor. If the real cursor should
1163         // be modified, the inset's dispatch has to do so explicitly.
1164         if (!cur.result().dispatched())
1165                 cur.dispatch(cmd);
1166
1167         //Do we have a selection?
1168         theSelection().haveSelection(cursor().selection());
1169
1170         // Redraw if requested and necessary.
1171         if (cur.result().dispatched() && cur.result().update())
1172                 return update(cur.result().update());
1173
1174         return false;
1175 }
1176
1177
1178 void BufferView::scroll(int y)
1179 {
1180         if (y > 0)
1181                 scrollDown(y);
1182         else if (y < 0)
1183                 scrollUp(-y);
1184 }
1185
1186
1187 void BufferView::scrollDown(int offset)
1188 {
1189         Text * text = &buffer_.text();
1190         TextMetrics & tm = text_metrics_[text];
1191         int ymax = height_ + offset;
1192         while (true) {
1193                 std::pair<pit_type, ParagraphMetrics const *> last = tm.last();
1194                 int bottom_pos = last.second->position() + last.second->descent();
1195                 if (last.first == text->paragraphs().size() - 1) {
1196                         if (bottom_pos <= height_)
1197                                 return;
1198                         offset = min(offset, bottom_pos - height_);
1199                         break;
1200                 }
1201                 if (bottom_pos > ymax)
1202                         break;
1203                 tm.newParMetricsDown();
1204         }
1205         offset_ref_ += offset;
1206         updateMetrics(false);
1207         buffer_.changed();
1208 }
1209
1210
1211 void BufferView::scrollUp(int offset)
1212 {
1213         Text * text = &buffer_.text();
1214         TextMetrics & tm = text_metrics_[text];
1215         int ymin = - offset;
1216         while (true) {
1217                 std::pair<pit_type, ParagraphMetrics const *> first = tm.first();
1218                 int top_pos = first.second->position() - first.second->ascent();
1219                 if (first.first == 0) {
1220                         if (top_pos >= 0)
1221                                 return;
1222                         offset = min(offset, - top_pos);
1223                         break;
1224                 }
1225                 if (top_pos < ymin)
1226                         break;
1227                 tm.newParMetricsUp();
1228         }
1229         offset_ref_ -= offset;
1230         updateMetrics(false);
1231         buffer_.changed();
1232 }
1233
1234
1235 void BufferView::setCursorFromRow(int row)
1236 {
1237         int tmpid = -1;
1238         int tmppos = -1;
1239
1240         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
1241
1242         cursor_.reset(buffer_.inset());
1243         if (tmpid == -1)
1244                 buffer_.text().setCursor(cursor_, 0, 0);
1245         else
1246                 buffer_.text().setCursor(cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
1247 }
1248
1249
1250 void BufferView::gotoLabel(docstring const & label)
1251 {
1252         for (InsetIterator it = inset_iterator_begin(buffer_.inset()); it; ++it) {
1253                 vector<docstring> labels;
1254                 it->getLabelList(buffer_, labels);
1255                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1256                         setCursor(it);
1257                         update();
1258                         return;
1259                 }
1260         }
1261 }
1262
1263
1264 TextMetrics const & BufferView::textMetrics(Text const * t) const
1265 {
1266         return const_cast<BufferView *>(this)->textMetrics(t);
1267 }
1268
1269
1270 TextMetrics & BufferView::textMetrics(Text const * t)
1271 {
1272         TextMetricsCache::iterator tmc_it  = text_metrics_.find(t);
1273         if (tmc_it == text_metrics_.end()) {
1274                 tmc_it = text_metrics_.insert(
1275                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
1276         }
1277         return tmc_it->second;
1278 }
1279
1280
1281 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
1282                 pit_type pit) const
1283 {
1284         return textMetrics(t).parMetrics(pit);
1285 }
1286
1287
1288 int BufferView::workHeight() const
1289 {
1290         return height_;
1291 }
1292
1293
1294 void BufferView::setCursor(DocIterator const & dit)
1295 {
1296         size_t const n = dit.depth();
1297         for (size_t i = 0; i < n; ++i)
1298                 dit[i].inset().edit(cursor_, true);
1299
1300         cursor_.setCursor(dit);
1301         cursor_.selection() = false;
1302 }
1303
1304
1305 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
1306 {
1307         // Would be wrong to delete anything if we have a selection.
1308         if (cur.selection())
1309                 return false;
1310
1311         bool need_anchor_change = false;
1312         bool changed = cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1313                 need_anchor_change);
1314
1315         if (need_anchor_change)
1316                 cur.resetAnchor();
1317
1318         if (!changed)
1319                 return false;
1320
1321         updateLabels(buffer_);
1322
1323         updateMetrics(false);
1324         buffer_.changed();
1325         return true;
1326 }
1327
1328
1329 bool BufferView::mouseSetCursor(Cursor & cur)
1330 {
1331         BOOST_ASSERT(&cur.bv() == this);
1332
1333         // this event will clear selection so we save selection for
1334         // persistent selection
1335         cap::saveSelection(cursor());
1336
1337         // Has the cursor just left the inset?
1338         bool badcursor = false;
1339         bool leftinset = (&cursor_.inset() != &cur.inset());
1340         if (leftinset)
1341                 badcursor = notifyCursorLeaves(cursor_, cur);
1342
1343         // do the dEPM magic if needed
1344         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
1345         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
1346         // the leftinset bool would not be necessary (badcursor instead).
1347         bool update = leftinset;
1348         if (!badcursor && cursor_.inTexted())
1349                 update |= checkDepm(cur, cursor_);
1350
1351         // if the cursor was in an empty script inset and the new
1352         // position is in the nucleus of the inset, notifyCursorLeaves
1353         // will kill the script inset itself. So we check all the
1354         // elements of the cursor to make sure that they are correct.
1355         // For an example, see bug 2933:
1356         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1357         // The code below could maybe be moved to a DocIterator method.
1358         //lyxerr << "cur before " << cur <<std::endl;
1359         DocIterator dit(cur.inset());
1360         dit.push_back(cur.bottom());
1361         size_t i = 1;
1362         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1363                 dit.push_back(cur[i]);
1364                 ++i;
1365         }
1366         //lyxerr << "5 cur after" << dit <<std::endl;
1367
1368         cursor_.setCursor(dit);
1369         cursor_.boundary(cur.boundary());
1370         cursor_.clearSelection();
1371         finishUndo();
1372         return update;
1373 }
1374
1375
1376 void BufferView::putSelectionAt(DocIterator const & cur,
1377                                 int length, bool backwards)
1378 {
1379         cursor_.clearSelection();
1380
1381         setCursor(cur);
1382
1383         if (length) {
1384                 if (backwards) {
1385                         cursor_.pos() += length;
1386                         cursor_.setSelection(cursor_, -length);
1387                 } else
1388                         cursor_.setSelection(cursor_, length);
1389         }
1390 }
1391
1392
1393 Cursor & BufferView::cursor()
1394 {
1395         return cursor_;
1396 }
1397
1398
1399 Cursor const & BufferView::cursor() const
1400 {
1401         return cursor_;
1402 }
1403
1404
1405 pit_type BufferView::anchor_ref() const
1406 {
1407         return anchor_ref_;
1408 }
1409
1410
1411 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1412 {
1413         return metrics_info_;
1414 }
1415
1416
1417 // FIXME: We should split-up updateMetrics() for the singlepar case.
1418 void BufferView::updateMetrics(bool singlepar)
1419 {
1420         Text & buftext = buffer_.text();
1421         pit_type const npit = int(buftext.paragraphs().size());
1422
1423         if (anchor_ref_ > int(npit - 1)) {
1424                 anchor_ref_ = int(npit - 1);
1425                 offset_ref_ = 0;
1426         }
1427
1428         if (!singlepar) {
1429                 // Clear out the position cache in case of full screen redraw,
1430                 coord_cache_.clear();
1431
1432                 // Clear out paragraph metrics to avoid having invalid metrics
1433                 // in the cache from paragraphs not relayouted below
1434                 // The complete text metrics will be redone.
1435                 text_metrics_.clear();
1436         }
1437
1438         TextMetrics & tm = textMetrics(&buftext);
1439
1440         pit_type const bottom_pit = cursor_.bottom().pit();
1441         // If the paragraph metrics has changed, we can not
1442         // use the singlepar optimisation.
1443         if (singlepar) {
1444                 int old_height = tm.parMetrics(bottom_pit).height();
1445                 // In Single Paragraph mode, rebreak only
1446                 // the (main text, not inset!) paragraph containing the cursor.
1447                 // (if this paragraph contains insets etc., rebreaking will
1448                 // recursively descend)
1449                 tm.redoParagraph(bottom_pit);
1450                 ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
1451                 if (pm.height() == old_height) {
1452                         // Paragraph height has not changed so we can proceed to
1453                         // the singlePar optimisation.
1454                         updateOffsetRef();
1455                         int y1 = pm.position() - pm.ascent();
1456                         int y2 = pm.position() + pm.descent();
1457                         metrics_info_ = ViewMetricsInfo(bottom_pit, bottom_pit, y1, y2,
1458                                 SingleParUpdate, npit);
1459                         LYXERR(Debug::PAINTING)
1460                                 << BOOST_CURRENT_FUNCTION
1461                                 << "\ny1: " << y1
1462                                 << " y2: " << y2
1463                                 << " pit: " << bottom_pit
1464                                 << " singlepar: " << singlepar
1465                                 << endl;
1466                         return;
1467                 }
1468         }
1469
1470         pit_type const pit = anchor_ref_;
1471         int pit1 = pit;
1472         int pit2 = pit;
1473
1474         // Rebreak anchor paragraph.
1475         tm.redoParagraph(pit);
1476
1477         updateOffsetRef();
1478
1479         int y0 = tm.parMetrics(pit).ascent() - offset_ref_;
1480
1481         // Redo paragraphs above anchor if necessary.
1482         int y1 = y0;
1483         while (y1 > 0 && pit1 > 0) {
1484                 y1 -= tm.parMetrics(pit1).ascent();
1485                 --pit1;
1486                 tm.redoParagraph(pit1);
1487                 y1 -= tm.parMetrics(pit1).descent();
1488         }
1489
1490         // Take care of ascent of first line
1491         y1 -= tm.parMetrics(pit1).ascent();
1492
1493         // Normalize anchor for next time
1494         anchor_ref_ = pit1;
1495         offset_ref_ = -y1;
1496
1497         // Grey at the beginning is ugly
1498         if (pit1 == 0 && y1 > 0) {
1499                 y0 -= y1;
1500                 y1 = 0;
1501                 anchor_ref_ = 0;
1502         }
1503
1504         // Redo paragraphs below the anchor if necessary.
1505         int y2 = y0;
1506         while (y2 < height_ && pit2 < int(npit) - 1) {
1507                 y2 += tm.parMetrics(pit2).descent();
1508                 ++pit2;
1509                 tm.redoParagraph(pit2);
1510                 y2 += tm.parMetrics(pit2).ascent();
1511         }
1512
1513         // Take care of descent of last line
1514         y2 += tm.parMetrics(pit2).descent();
1515
1516         LYXERR(Debug::PAINTING)
1517                 << BOOST_CURRENT_FUNCTION
1518                 << "\n y1: " << y1
1519                 << " y2: " << y2
1520                 << " pit1: " << pit1
1521                 << " pit2: " << pit2
1522                 << " npit: " << npit
1523                 << " singlepar: " << singlepar
1524                 << endl;
1525
1526         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2,
1527                 FullScreenUpdate, npit);
1528
1529         if (lyxerr.debugging(Debug::WORKAREA)) {
1530                 LYXERR(Debug::WORKAREA) << "BufferView::updateMetrics" << endl;
1531                 coord_cache_.dump();
1532         }
1533 }
1534
1535
1536 void BufferView::menuInsertLyXFile(string const & filenm)
1537 {
1538         BOOST_ASSERT(cursor_.inTexted());
1539         string filename = filenm;
1540
1541         if (filename.empty()) {
1542                 // Launch a file browser
1543                 // FIXME UNICODE
1544                 string initpath = lyxrc.document_path;
1545                 string const trypath = buffer_.filePath();
1546                 // If directory is writeable, use this as default.
1547                 if (isDirWriteable(FileName(trypath)))
1548                         initpath = trypath;
1549
1550                 // FIXME UNICODE
1551                 FileDialog fileDlg(_("Select LyX document to insert"),
1552                         LFUN_FILE_INSERT,
1553                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1554                         make_pair(_("Examples|#E#e"),
1555                                     from_utf8(addPath(package().system_support().absFilename(),
1556                                     "examples"))));
1557
1558                 FileDialog::Result result =
1559                         fileDlg.open(from_utf8(initpath),
1560                                      FileFilterList(_("LyX Documents (*.lyx)")),
1561                                      docstring());
1562
1563                 if (result.first == FileDialog::Later)
1564                         return;
1565
1566                 // FIXME UNICODE
1567                 filename = to_utf8(result.second);
1568
1569                 // check selected filename
1570                 if (filename.empty()) {
1571                         // emit message signal.
1572                         message(_("Canceled."));
1573                         return;
1574                 }
1575         }
1576
1577         // Get absolute path of file and add ".lyx"
1578         // to the filename if necessary
1579         filename = fileSearch(string(), filename, "lyx").absFilename();
1580
1581         docstring const disp_fn = makeDisplayPath(filename);
1582         // emit message signal.
1583         message(bformat(_("Inserting document %1$s..."), disp_fn));
1584
1585         docstring res;
1586         Buffer buf("", false);
1587         if (lyx::loadLyXFile(&buf, FileName(filename))) {
1588                 ErrorList & el = buffer_.errorList("Parse");
1589                 // Copy the inserted document error list into the current buffer one.
1590                 el = buf.errorList("Parse");
1591                 recordUndo(cursor_);
1592                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1593                                              buf.params().getTextClassPtr(), el);
1594                 res = _("Document %1$s inserted.");
1595         } else
1596                 res = _("Could not insert document %1$s");
1597
1598         // emit message signal.
1599         message(bformat(res, disp_fn));
1600         buffer_.errors("Parse");
1601         updateMetrics(false);
1602 }
1603
1604
1605 void BufferView::draw(frontend::Painter & pain)
1606 {
1607         PainterInfo pi(this, pain);
1608         // Should the whole screen, including insets, be refreshed?
1609         // FIXME: We should also distinguish DecorationUpdate to avoid text
1610         // drawing if possible. This is not possible to do easily right now
1611         // because of the single backing pixmap.
1612         pi.full_repaint = metrics_info_.update_strategy != SingleParUpdate;
1613
1614         if (pi.full_repaint)
1615                 // Clear background (if not delegated to rows)
1616                 pain.fillRectangle(0, metrics_info_.y1, width_,
1617                         metrics_info_.y2 - metrics_info_.y1,
1618                         buffer_.inset().backgroundColor());
1619
1620         LYXERR(Debug::PAINTING) << "\t\t*** START DRAWING ***" << endl;
1621         Text & text = buffer_.text();
1622         TextMetrics const & tm = text_metrics_[&text];
1623         int y = metrics_info_.y1 + tm.parMetrics(metrics_info_.p1).ascent();
1624         if (!pi.full_repaint)
1625                 tm.drawParagraph(pi, metrics_info_.p1, 0, y);
1626         else
1627                 tm.draw(pi, 0, y);
1628         LYXERR(Debug::PAINTING) << "\n\t\t*** END DRAWING  ***" << endl;
1629
1630         // and grey out above (should not happen later)
1631 //      lyxerr << "par ascent: " << text.getPar(metrics_info_.p1).ascent() << endl;
1632         if (metrics_info_.y1 > 0
1633                 && metrics_info_.update_strategy == FullScreenUpdate)
1634                 pain.fillRectangle(0, 0, width_, metrics_info_.y1, Color::bottomarea);
1635
1636         // and possibly grey out below
1637 //      lyxerr << "par descent: " << text.getPar(metrics_info_.p1).ascent() << endl;
1638         if (metrics_info_.y2 < height_
1639                 && metrics_info_.update_strategy == FullScreenUpdate)
1640                 pain.fillRectangle(0, metrics_info_.y2, width_,
1641                         height_ - metrics_info_.y2, Color::bottomarea);
1642 }
1643
1644 } // namespace lyx