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