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 "BranchList.h"
  20 #include "Buffer.h"
  21 #include "buffer_funcs.h"
  22 #include "BufferList.h"
  23 #include "BufferParams.h"
  24 #include "CoordCache.h"
  25 #include "Cursor.h"
  26 #include "CutAndPaste.h"
  27 #include "DispatchResult.h"
  28 #include "ErrorList.h"
  29 #include "factory.h"
  30 #include "FloatList.h"
  31 #include "FuncRequest.h"
  32 #include "FuncStatus.h"
  33 #include "Intl.h"
  34 #include "InsetIterator.h"
  35 #include "Language.h"
  36 #include "LaTeXFeatures.h"
  37 #include "LayoutFile.h"
  38 #include "Lexer.h"
  39 #include "LyX.h"
  40 #include "LyXAction.h"
  41 #include "lyxfind.h"
  42 #include "LyXFunc.h"
  43 #include "Layout.h"
  44 #include "LyXRC.h"
  45 #include "MetricsInfo.h"
  46 #include "Paragraph.h"
  47 #include "ParagraphParameters.h"
  48 #include "ParIterator.h"
  49 #include "Session.h"
  50 #include "Text.h"
  51 #include "TextClass.h"
  52 #include "TextMetrics.h"
  53 #include "TexRow.h"
  54 #include "TocBackend.h"
  55 #include "VSpace.h"
  56 #include "WordLangTuple.h"
  57
  58 #include "insets/InsetBibtex.h"
  59 #include "insets/InsetCommand.h" // ChangeRefs
  60 #include "insets/InsetExternal.h"
  61 #include "insets/InsetGraphics.h"
  62 #include "insets/InsetRef.h"
  63 #include "insets/InsetText.h"
  64 #include "insets/InsetNote.h"
  65
  66 #include "frontends/alert.h"
  67 #include "frontends/Application.h"
  68 #include "frontends/Delegates.h"
  69 #include "frontends/FontMetrics.h"
  70 #include "frontends/Painter.h"
  71 #include "frontends/Selection.h"
  72
  73 #include "graphics/Previews.h"
  74
  75 #include "support/convert.h"
  76 #include "support/debug.h"
  77 #include "support/ExceptionMessage.h"
  78 #include "support/filetools.h"
  79 #include "support/gettext.h"
  80 #include "support/lstrings.h"
  81 #include "support/Package.h"
  82 #include "support/types.h"
  83
  84 #include <cerrno>
  85 #include <fstream>
  86 #include <functional>
  87 #include <iterator>
  88 #include <sstream>
  89 #include <vector>
  90
  91 using namespace std;
  92 using namespace lyx::support;
  93
  94 namespace lyx {
  95
  96 namespace Alert = frontend::Alert;
  97
  98 namespace {
  99
 100 /// Return an inset of this class if it exists at the current cursor position
 101 template <class T>
 102 T * getInsetByCode(Cursor const & cur, InsetCode code)
 103 {
 104         DocIterator it = cur;
 105         Inset * inset = it.nextInset();
 106         if (inset && inset->lyxCode() == code)
 107                 return static_cast<T*>(inset);
 108         return 0;
 109 }
 110
 111
 112 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 113         bool same_content);
 114
 115 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 116         docstring const & contents)
 117 {
 118         DocIterator tmpdit = dit;
 119
 120         while (tmpdit) {
 121                 Inset const * inset = tmpdit.nextInset();
 122                 if (inset
 123                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()
 124                     && (contents.empty() ||
 125                     static_cast<InsetCommand const *>(inset)->getFirstNonOptParam() == contents)) {
 126                         dit = tmpdit;
 127                         return true;
 128                 }
 129                 tmpdit.forwardInset();
 130         }
 131
 132         return false;
 133 }
 134
 135
 136 /// Looks for next inset with one of the given codes.
 137 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 138         bool same_content)
 139 {
 140         docstring contents;
 141         DocIterator tmpdit = dit;
 142         tmpdit.forwardInset();
 143         if (!tmpdit)
 144                 return false;
 145
 146         if (same_content) {
 147                 Inset const * inset = tmpdit.nextInset();
 148                 if (inset
 149                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()) {
 150                         contents = static_cast<InsetCommand const *>(inset)->getFirstNonOptParam();
 151                 }
 152         }
 153
 154         if (!findNextInset(tmpdit, codes, contents)) {
 155                 if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
 156                         Inset * inset = &tmpdit.bottom().inset();
 157                         tmpdit = doc_iterator_begin(&inset->buffer(), inset);
 158                         if (!findNextInset(tmpdit, codes, contents))
 159                                 return false;
 160                 } else {
 161                         return false;
 162                 }
 163         }
 164
 165         dit = tmpdit;
 166         return true;
 167 }
 168
 169
 170 /// Looks for next inset with the given code
 171 void findInset(DocIterator & dit, InsetCode code, bool same_content)
 172 {
 173         findInset(dit, vector<InsetCode>(1, code), same_content);
 174 }
 175
 176
 177 /// Moves cursor to the next inset with one of the given codes.
 178 void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
 179                bool same_content)
 180 {
 181         Cursor tmpcur = bv->cursor();
 182         if (!findInset(tmpcur, codes, same_content)) {
 183                 bv->cursor().message(_("No more insets"));
 184                 return;
 185         }
 186
 187         tmpcur.clearSelection();
 188         bv->setCursor(tmpcur);
 189         bv->showCursor();
 190 }
 191
 192
 193 /// Moves cursor to the next inset with given code.
 194 void gotoInset(BufferView * bv, InsetCode code, bool same_content)
 195 {
 196         gotoInset(bv, vector<InsetCode>(1, code), same_content);
 197 }
 198
 199
 200 /// A map from a Text to the associated text metrics
 201 typedef map<Text const *, TextMetrics> TextMetricsCache;
 202
 203 enum ScreenUpdateStrategy {
 204         NoScreenUpdate,
 205         SingleParUpdate,
 206         FullScreenUpdate,
 207         DecorationUpdate
 208 };
 209
 210 } // anon namespace
 211
 212
 213 /////////////////////////////////////////////////////////////////////
 214 //
 215 // BufferView
 216 //
 217 /////////////////////////////////////////////////////////////////////
 218
 219 struct BufferView::Private
 220 {
 221         Private(BufferView & bv): wh_(0), cursor_(bv),
 222                 anchor_pit_(0), anchor_ypos_(0),
 223                 inlineCompletionUniqueChars_(0),
 224                 last_inset_(0), bookmark_edit_position_(0), gui_(0)
 225         {}
 226
 227         ///
 228         ScrollbarParameters scrollbarParameters_;
 229         ///
 230         ScreenUpdateStrategy update_strategy_;
 231         ///
 232         CoordCache coord_cache_;
 233
 234         /// Estimated average par height for scrollbar.
 235         int wh_;
 236         /// this is used to handle XSelection events in the right manner.
 237         struct {
 238                 CursorSlice cursor;
 239                 CursorSlice anchor;
 240                 bool set;
 241         } xsel_cache_;
 242         ///
 243         Cursor cursor_;
 244         ///
 245         pit_type anchor_pit_;
 246         ///
 247         int anchor_ypos_;
 248         ///
 249         vector<int> par_height_;
 250
 251         ///
 252         DocIterator inlineCompletionPos_;
 253         ///
 254         docstring inlineCompletion_;
 255         ///
 256         size_t inlineCompletionUniqueChars_;
 257
 258         /// keyboard mapping object.
 259         Intl intl_;
 260
 261         /// last visited inset.
 262         /** kept to send setMouseHover(false).
 263           * Not owned, so don't delete.
 264           */
 265         Inset * last_inset_;
 266
 267         // cache for id of the paragraph which was edited the last time
 268         int bookmark_edit_position_;
 269
 270         mutable TextMetricsCache text_metrics_;
 271
 272         /// Whom to notify.
 273         /** Not owned, so don't delete.
 274           */
 275         frontend::GuiBufferViewDelegate * gui_;
 276
 277         /// Cache for Find Next
 278         FuncRequest search_request_cache_;
 279
 280         ///
 281         map<string, Inset *> edited_insets_;
 282 };
 283
 284
 285 BufferView::BufferView(Buffer & buf)
 286         : width_(0), height_(0), full_screen_(false), buffer_(buf),
 287       d(new Private(*this))
 288 {
 289         d->xsel_cache_.set = false;
 290         d->intl_.initKeyMapper(lyxrc.use_kbmap);
 291
 292         d->cursor_.setBuffer(&buf);
 293         d->cursor_.push(buffer_.inset());
 294         d->cursor_.resetAnchor();
 295         d->cursor_.setCurrentFont();
 296
 297         if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 298                 thePreviews().generateBufferPreviews(buffer_);
 299 }
 300
 301
 302 BufferView::~BufferView()
 303 {
 304         // current buffer is going to be switched-off, save cursor pos
 305         // Ideally, the whole cursor stack should be saved, but session
 306         // currently can only handle bottom (whole document) level pit and pos.
 307         // That is to say, if a cursor is in a nested inset, it will be
 308         // restore to the left of the top level inset.
 309         LastFilePosSection::FilePos fp;
 310         fp.pit = d->cursor_.bottom().pit();
 311         fp.pos = d->cursor_.bottom().pos();
 312         theSession().lastFilePos().save(buffer_.fileName(), fp);
 313
 314         delete d;
 315 }
 316
 317
 318 int BufferView::rightMargin() const
 319 {
 320         // The additional test for the case the outliner is opened.
 321         if (!full_screen_ ||
 322                 !lyxrc.full_screen_limit ||
 323                 width_ < lyxrc.full_screen_width + 20)
 324                         return 10;
 325
 326         return (width_ - lyxrc.full_screen_width) / 2;
 327 }
 328
 329
 330 int BufferView::leftMargin() const
 331 {
 332         return rightMargin();
 333 }
 334
 335
 336 bool BufferView::isTopScreen() const
 337 {
 338         return d->scrollbarParameters_.position == d->scrollbarParameters_.min;
 339 }
 340
 341
 342 bool BufferView::isBottomScreen() const
 343 {
 344         return d->scrollbarParameters_.position == d->scrollbarParameters_.max;
 345 }
 346
 347
 348 Intl & BufferView::getIntl()
 349 {
 350         return d->intl_;
 351 }
 352
 353
 354 Intl const & BufferView::getIntl() const
 355 {
 356         return d->intl_;
 357 }
 358
 359
 360 CoordCache & BufferView::coordCache()
 361 {
 362         return d->coord_cache_;
 363 }
 364
 365
 366 CoordCache const & BufferView::coordCache() const
 367 {
 368         return d->coord_cache_;
 369 }
 370
 371
 372 Buffer & BufferView::buffer()
 373 {
 374         return buffer_;
 375 }
 376
 377
 378 Buffer const & BufferView::buffer() const
 379 {
 380         return buffer_;
 381 }
 382
 383
 384 bool BufferView::fitCursor()
 385 {
 386         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
 387                 frontend::FontMetrics const & fm =
 388                         theFontMetrics(d->cursor_.getFont().fontInfo());
 389                 int const asc = fm.maxAscent();
 390                 int const des = fm.maxDescent();
 391                 Point const p = getPos(d->cursor_, d->cursor_.boundary());
 392                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 393                         return false;
 394         }
 395         return true;
 396 }
 397
 398
 399 void BufferView::processUpdateFlags(Update::flags flags)
 400 {
 401         // last_inset_ points to the last visited inset. This pointer may become
 402         // invalid because of keyboard editing. Since all such operations
 403         // causes screen update(), I reset last_inset_ to avoid such a problem.
 404         d->last_inset_ = 0;
 405         // This is close to a hot-path.
 406         LYXERR(Debug::DEBUG, "BufferView::processUpdateFlags()"
 407                 << "[fitcursor = " << (flags & Update::FitCursor)
 408                 << ", forceupdate = " << (flags & Update::Force)
 409                 << ", singlepar = " << (flags & Update::SinglePar)
 410                 << "]  buffer: " << &buffer_);
 411
 412         buffer_.updateMacros();
 413
 414         // Now do the first drawing step if needed. This consists on updating
 415         // the CoordCache in updateMetrics().
 416         // The second drawing step is done in WorkArea::redraw() if needed.
 417
 418         // Case when no explicit update is requested.
 419         if (!flags) {
 420                 // no need to redraw anything.
 421                 d->update_strategy_ = NoScreenUpdate;
 422                 return;
 423         }
 424
 425         if (flags == Update::Decoration) {
 426                 d->update_strategy_ = DecorationUpdate;
 427                 buffer_.changed();
 428                 return;
 429         }
 430
 431         if (flags == Update::FitCursor
 432                 || flags == (Update::Decoration | Update::FitCursor)) {
 433                 // tell the frontend to update the screen if needed.
 434                 if (fitCursor()) {
 435                         showCursor();
 436                         return;
 437                 }
 438                 if (flags & Update::Decoration) {
 439                         d->update_strategy_ = DecorationUpdate;
 440                         buffer_.changed();
 441                         return;
 442                 }
 443                 // no screen update is needed.
 444                 d->update_strategy_ = NoScreenUpdate;
 445                 return;
 446         }
 447
 448         bool const full_metrics = flags & Update::Force || !singleParUpdate();
 449
 450         if (full_metrics)
 451                 // We have to update the full screen metrics.
 452                 updateMetrics();
 453
 454         if (!(flags & Update::FitCursor)) {
 455                 // Nothing to do anymore. Trigger a redraw and return
 456                 buffer_.changed();
 457                 return;
 458         }
 459
 460         // updateMetrics() does not update paragraph position
 461         // This is done at draw() time. So we need a redraw!
 462         buffer_.changed();
 463
 464         if (fitCursor()) {
 465                 // The cursor is off screen so ensure it is visible.
 466                 // refresh it:
 467                 showCursor();
 468         }
 469 }
 470
 471
 472 void BufferView::updateScrollbar()
 473 {
 474         if (height_ == 0 && width_ == 0)
 475                 return;
 476
 477         // We prefer fixed size line scrolling.
 478         d->scrollbarParameters_.single_step = defaultRowHeight();
 479         // We prefer full screen page scrolling.
 480         d->scrollbarParameters_.page_step = height_;
 481
 482         Text & t = buffer_.text();
 483         TextMetrics & tm = d->text_metrics_[&t];
 484
 485         LYXERR(Debug::GUI, " Updating scrollbar: height: "
 486                 << t.paragraphs().size()
 487                 << " curr par: " << d->cursor_.bottom().pit()
 488                 << " default height " << defaultRowHeight());
 489
 490         size_t const parsize = t.paragraphs().size();
 491         if (d->par_height_.size() != parsize) {
 492                 d->par_height_.clear();
 493                 // FIXME: We assume a default paragraph height of 2 rows. This
 494                 // should probably be pondered with the screen width.
 495                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
 496         }
 497
 498         // Look at paragraph heights on-screen
 499         pair<pit_type, ParagraphMetrics const *> first = tm.first();
 500         pair<pit_type, ParagraphMetrics const *> last = tm.last();
 501         for (pit_type pit = first.first; pit <= last.first; ++pit) {
 502                 d->par_height_[pit] = tm.parMetrics(pit).height();
 503                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
 504                         << d->par_height_[pit]);
 505         }
 506
 507         int top_pos = first.second->position() - first.second->ascent();
 508         int bottom_pos = last.second->position() + last.second->descent();
 509         bool first_visible = first.first == 0 && top_pos >= 0;
 510         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
 511         if (first_visible && last_visible) {
 512                 d->scrollbarParameters_.min = 0;
 513                 d->scrollbarParameters_.max = 0;
 514                 return;
 515         }
 516
 517         d->scrollbarParameters_.min = top_pos;
 518         for (size_t i = 0; i != size_t(first.first); ++i)
 519                 d->scrollbarParameters_.min -= d->par_height_[i];
 520         d->scrollbarParameters_.max = bottom_pos;
 521         for (size_t i = last.first + 1; i != parsize; ++i)
 522                 d->scrollbarParameters_.max += d->par_height_[i];
 523
 524         d->scrollbarParameters_.position = 0;
 525         // The reference is the top position so we remove one page.
 526         if (lyxrc.scroll_below_document)
 527                 d->scrollbarParameters_.max -= minVisiblePart();
 528         else
 529                 d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 530 }
 531
 532
 533 ScrollbarParameters const & BufferView::scrollbarParameters() const
 534 {
 535         return d->scrollbarParameters_;
 536 }
 537
 538
 539 docstring BufferView::toolTip(int x, int y) const
 540 {
 541         // Get inset under mouse, if there is one.
 542         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 543         if (!covering_inset)
 544                 // No inset, no tooltip...
 545                 return docstring();
 546         return covering_inset->toolTip(*this, x, y);
 547 }
 548
 549
 550 docstring BufferView::contextMenu(int x, int y) const
 551 {
 552         //If there is a selection, return the containing inset menu
 553         if (d->cursor_.selection())
 554                 return d->cursor_.inset().contextMenu(*this, x, y);
 555
 556         // Get inset under mouse, if there is one.
 557         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 558         if (covering_inset)
 559                 return covering_inset->contextMenu(*this, x, y);
 560
 561         return buffer_.inset().contextMenu(*this, x, y);
 562 }
 563
 564
 565 void BufferView::scrollDocView(int value)
 566 {
 567         int const offset = value - d->scrollbarParameters_.position;
 568
 569         // No scrolling at all? No need to redraw anything
 570         if (offset == 0)
 571                 return;
 572
 573         // If the offset is less than 2 screen height, prefer to scroll instead.
 574         if (abs(offset) <= 2 * height_) {
 575                 d->anchor_ypos_ -= offset;
 576                 updateMetrics();
 577                 buffer_.changed();
 578                 return;
 579         }
 580
 581         // cut off at the top
 582         if (value <= d->scrollbarParameters_.min) {
 583                 DocIterator dit = doc_iterator_begin(&buffer_);
 584                 showCursor(dit);
 585                 LYXERR(Debug::SCROLLING, "scroll to top");
 586                 return;
 587         }
 588
 589         // cut off at the bottom
 590         if (value >= d->scrollbarParameters_.max) {
 591                 DocIterator dit = doc_iterator_end(&buffer_);
 592                 dit.backwardPos();
 593                 showCursor(dit);
 594                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 595                 return;
 596         }
 597
 598         // find paragraph at target position
 599         int par_pos = d->scrollbarParameters_.min;
 600         pit_type i = 0;
 601         for (; i != int(d->par_height_.size()); ++i) {
 602                 par_pos += d->par_height_[i];
 603                 if (par_pos >= value)
 604                         break;
 605         }
 606
 607         if (par_pos < value) {
 608                 // It seems we didn't find the correct pit so stay on the safe side and
 609                 // scroll to bottom.
 610                 LYXERR0("scrolling position not found!");
 611                 scrollDocView(d->scrollbarParameters_.max);
 612                 return;
 613         }
 614
 615         DocIterator dit = doc_iterator_begin(&buffer_);
 616         dit.pit() = i;
 617         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 618         showCursor(dit);
 619 }
 620
 621
 622 // FIXME: this method is not working well.
 623 void BufferView::setCursorFromScrollbar()
 624 {
 625         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 626
 627         int const height = 2 * defaultRowHeight();
 628         int const first = height;
 629         int const last = height_ - height;
 630         int newy = 0;
 631         Cursor const & oldcur = d->cursor_;
 632
 633         switch (cursorStatus(oldcur)) {
 634         case CUR_ABOVE:
 635                 newy = first;
 636                 break;
 637         case CUR_BELOW:
 638                 newy = last;
 639                 break;
 640         case CUR_INSIDE:
 641                 int const y = getPos(oldcur, oldcur.boundary()).y_;
 642                 newy = min(last, max(y, first));
 643                 if (y == newy)
 644                         return;
 645         }
 646         // We reset the cursor because cursorStatus() does not
 647         // work when the cursor is within mathed.
 648         Cursor cur(*this);
 649         cur.reset();
 650         tm.setCursorFromCoordinates(cur, 0, newy);
 651
 652         // update the bufferview cursor and notify insets
 653         // FIXME: Care about the d->cursor_ flags to redraw if needed
 654         Cursor old = d->cursor_;
 655         mouseSetCursor(cur);
 656         bool badcursor = notifyCursorLeavesOrEnters(old, d->cursor_);
 657         if (badcursor)
 658                 d->cursor_.fixIfBroken();
 659 }
 660
 661
 662 Change const BufferView::getCurrentChange() const
 663 {
 664         if (!d->cursor_.selection())
 665                 return Change(Change::UNCHANGED);
 666
 667         DocIterator dit = d->cursor_.selectionBegin();
 668         return dit.paragraph().lookupChange(dit.pos());
 669 }
 670
 671
 672 // this could be used elsewhere as well?
 673 // FIXME: This does not work within mathed!
 674 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 675 {
 676         Point const p = getPos(dit, dit.boundary());
 677         if (p.y_ < 0)
 678                 return CUR_ABOVE;
 679         if (p.y_ > workHeight())
 680                 return CUR_BELOW;
 681         return CUR_INSIDE;
 682 }
 683
 684
 685 void BufferView::bookmarkEditPosition()
 686 {
 687         // Don't eat cpu time for each keystroke
 688         if (d->cursor_.paragraph().id() == d->bookmark_edit_position_)
 689                 return;
 690         saveBookmark(0);
 691         d->bookmark_edit_position_ = d->cursor_.paragraph().id();
 692 }
 693
 694
 695 void BufferView::saveBookmark(unsigned int idx)
 696 {
 697         // tentatively save bookmark, id and pos will be used to
 698         // acturately locate a bookmark in a 'live' lyx session.
 699         // pit and pos will be updated with bottom level pit/pos
 700         // when lyx exits.
 701         theSession().bookmarks().save(
 702                 buffer_.fileName(),
 703                 d->cursor_.bottom().pit(),
 704                 d->cursor_.bottom().pos(),
 705                 d->cursor_.paragraph().id(),
 706                 d->cursor_.pos(),
 707                 idx
 708         );
 709         if (idx)
 710                 // emit message signal.
 711                 message(_("Save bookmark"));
 712 }
 713
 714
 715 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 716         int top_id, pos_type top_pos)
 717 {
 718         bool success = false;
 719         DocIterator dit;
 720
 721         d->cursor_.clearSelection();
 722
 723         // if a valid par_id is given, try it first
 724         // This is the case for a 'live' bookmark when unique paragraph ID
 725         // is used to track bookmarks.
 726         if (top_id > 0) {
 727                 dit = buffer_.getParFromID(top_id);
 728                 if (!dit.atEnd()) {
 729                         dit.pos() = min(dit.paragraph().size(), top_pos);
 730                         // Some slices of the iterator may not be
 731                         // reachable (e.g. closed collapsable inset)
 732                         // so the dociterator may need to be
 733                         // shortened. Otherwise, setCursor may crash
 734                         // lyx when the cursor can not be set to these
 735                         // insets.
 736                         size_t const n = dit.depth();
 737                         for (size_t i = 0; i < n; ++i)
 738                                 if (!dit[i].inset().editable()) {
 739                                         dit.resize(i);
 740                                         break;
 741                                 }
 742                         success = true;
 743                 }
 744         }
 745
 746         // if top_id == 0, or searching through top_id failed
 747         // This is the case for a 'restored' bookmark when only bottom
 748         // (document level) pit was saved. Because of this, bookmark
 749         // restoration is inaccurate. If a bookmark was within an inset,
 750         // it will be restored to the left of the outmost inset that contains
 751         // the bookmark.
 752         if (bottom_pit < int(buffer_.paragraphs().size())) {
 753                 dit = doc_iterator_begin(&buffer_);
 754
 755                 dit.pit() = bottom_pit;
 756                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 757                 success = true;
 758         }
 759
 760         if (success) {
 761                 // Note: only bottom (document) level pit is set.
 762                 setCursor(dit);
 763                 // set the current font.
 764                 d->cursor_.setCurrentFont();
 765                 // To center the screen on this new position we need the
 766                 // paragraph position which is computed at draw() time.
 767                 // So we need a redraw!
 768                 buffer_.changed();
 769                 if (fitCursor())
 770                         showCursor();
 771         }
 772
 773         return success;
 774 }
 775
 776
 777 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 778 {
 779         if (lyxrc.rtl_support) {
 780                 if (d->cursor_.real_current_font.isRightToLeft()) {
 781                         if (d->intl_.keymap == Intl::PRIMARY)
 782                                 d->intl_.keyMapSec();
 783                 } else {
 784                         if (d->intl_.keymap == Intl::SECONDARY)
 785                                 d->intl_.keyMapPrim();
 786                 }
 787         }
 788
 789         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 790 }
 791
 792
 793 int BufferView::workWidth() const
 794 {
 795         return width_;
 796 }
 797
 798
 799 void BufferView::recenter()
 800 {
 801         showCursor(d->cursor_, true);
 802 }
 803
 804
 805 void BufferView::showCursor()
 806 {
 807         showCursor(d->cursor_, false);
 808 }
 809
 810
 811 void BufferView::showCursor(DocIterator const & dit, bool recenter)
 812 {
 813         if (scrollToCursor(dit, recenter))
 814                 buffer_.changed();
 815 }
 816
 817
 818 void BufferView::scrollToCursor()
 819 {
 820         scrollToCursor(d->cursor_, false);
 821 }
 822
 823
 824 bool BufferView::scrollToCursor(DocIterator const & dit, bool recenter)
 825 {
 826         // We are not properly started yet, delay until resizing is
 827         // done.
 828         if (height_ == 0)
 829                 return false;
 830
 831         LYXERR(Debug::SCROLLING, "recentering!");
 832
 833         CursorSlice const & bot = dit.bottom();
 834         TextMetrics & tm = d->text_metrics_[bot.text()];
 835
 836         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 837         int bot_pit = bot.pit();
 838         if (bot_pit > max_pit) {
 839                 // FIXME: Why does this happen?
 840                 LYXERR0("bottom pit is greater that max pit: "
 841                         << bot_pit << " > " << max_pit);
 842                 bot_pit = max_pit;
 843         }
 844
 845         if (bot_pit == tm.first().first - 1)
 846                 tm.newParMetricsUp();
 847         else if (bot_pit == tm.last().first + 1)
 848                 tm.newParMetricsDown();
 849
 850         if (tm.contains(bot_pit)) {
 851                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 852                 LASSERT(!pm.rows().empty(), /**/);
 853                 // FIXME: smooth scrolling doesn't work in mathed.
 854                 CursorSlice const & cs = dit.innerTextSlice();
 855                 int offset = coordOffset(dit, dit.boundary()).y_;
 856                 int ypos = pm.position() + offset;
 857                 Dimension const & row_dim =
 858                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 859                 int scrolled = 0;
 860                 if (recenter)
 861                         scrolled = scroll(ypos - height_/2);
 862                 else if (ypos - row_dim.ascent() < 0)
 863                         scrolled = scrollUp(- ypos + row_dim.ascent());
 864                 else if (ypos + row_dim.descent() > height_)
 865                         scrolled = scrollDown(ypos - height_ + defaultRowHeight() );
 866
 867                 // else, nothing to do, the cursor is already visible so we just return.
 868                 if (scrolled != 0) {
 869                         updateMetrics();
 870                         return true;
 871                 }
 872                 return false;
 873         }
 874
 875         // fix inline completion position
 876         if (d->inlineCompletionPos_.fixIfBroken())
 877                 d->inlineCompletionPos_ = DocIterator();
 878
 879         tm.redoParagraph(bot_pit);
 880         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 881         int offset = coordOffset(dit, dit.boundary()).y_;
 882
 883         d->anchor_pit_ = bot_pit;
 884         CursorSlice const & cs = dit.innerTextSlice();
 885         Dimension const & row_dim =
 886                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 887
 888         if (recenter)
 889                 d->anchor_ypos_ = height_/2;
 890         else if (d->anchor_pit_ == 0)
 891                 d->anchor_ypos_ = offset + pm.ascent();
 892         else if (d->anchor_pit_ == max_pit)
 893                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
 894         else if (offset > height_)
 895                 d->anchor_ypos_ = height_ - offset - defaultRowHeight();
 896         else
 897                 d->anchor_ypos_ = defaultRowHeight() * 2;
 898
 899         updateMetrics();
 900         return true;
 901 }
 902
 903
 904 void BufferView::updateLayout(DocumentClass const * const oldlayout)
 905 {
 906         message(_("Converting document to new document class..."));
 907
 908         StableDocIterator backcur(d->cursor_);
 909         ErrorList & el = buffer_.errorList("Class Switch");
 910         cap::switchBetweenClasses(
 911                         oldlayout, buffer_.params().documentClassPtr(),
 912                         static_cast<InsetText &>(buffer_.inset()), el);
 913
 914         setCursor(backcur.asDocIterator(&buffer_));
 915
 916         buffer_.errors("Class Switch");
 917         buffer_.updateLabels();
 918 }
 919
 920 /** Return the change status at cursor position, taking in account the
 921  * status at each level of the document iterator (a table in a deleted
 922  * footnote is deleted).
 923  * When \param outer is true, the top slice is not looked at.
 924  */
 925 static Change::Type lookupChangeType(DocIterator const & dit, bool outer = false)
 926 {
 927         size_t const depth = dit.depth() - (outer ? 1 : 0);
 928
 929         for (size_t i = 0 ; i < depth ; ++i) {
 930                 CursorSlice const & slice = dit[i];
 931                 if (!slice.inset().inMathed()
 932                     && slice.pos() < slice.paragraph().size()) {
 933                         Change::Type const ch = slice.paragraph().lookupChange(slice.pos()).type;
 934                         if (ch != Change::UNCHANGED)
 935                                 return ch;
 936                 }
 937         }
 938         return Change::UNCHANGED;
 939 }
 940
 941
 942 bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
 943 {
 944         // Can we use a readonly buffer?
 945         if (buffer_.isReadonly()
 946             && !lyxaction.funcHasFlag(cmd.action, LyXAction::ReadOnly)
 947             && !lyxaction.funcHasFlag(cmd.action, LyXAction::NoBuffer)) {
 948                 flag.message(from_utf8(N_("Document is read-only")));
 949                 flag.setEnabled(false);
 950                 return true;
 951         }
 952         // Are we in a DELETED change-tracking region?
 953         if (lookupChangeType(d->cursor_, true) == Change::DELETED
 954             && !lyxaction.funcHasFlag(cmd.action, LyXAction::ReadOnly)
 955             && !lyxaction.funcHasFlag(cmd.action, LyXAction::NoBuffer)) {
 956                 flag.message(from_utf8(N_("This portion of the document is deleted.")));
 957                 flag.setEnabled(false);
 958                 return true;
 959         }
 960
 961         Cursor & cur = d->cursor_;
 962
 963         if (cur.getStatus(cmd, flag))
 964                 return true;
 965
 966         switch (cmd.action) {
 967
 968         // FIXME: This is a bit problematic because we don't check is this is a
 969         // document BufferView or not for these LFUNs. We probably have to
 970         // dispatch both to currentBufferView() and, if that fails,
 971         // to documentBufferView(); same as we do know for current Buffer and
 972         // document Buffer. Ideally those LFUN should go to Buffer as they*
 973         // operate on the full Buffer and the cursor is only needed either for
 974         // an Undo record or to restore a cursor position. But we don't know
 975         // how to do that inside Buffer of course.
 976         case LFUN_BUFFER_PARAMS_APPLY:
 977         case LFUN_LAYOUT_MODULES_CLEAR:
 978         case LFUN_LAYOUT_MODULE_ADD:
 979         case LFUN_LAYOUT_RELOAD:
 980         case LFUN_TEXTCLASS_APPLY:
 981         case LFUN_TEXTCLASS_LOAD:
 982                 flag.setEnabled(!buffer_.isReadonly());
 983                 break;
 984
 985         case LFUN_UNDO:
 986                 flag.setEnabled(buffer_.undo().hasUndoStack());
 987                 break;
 988         case LFUN_REDO:
 989                 flag.setEnabled(buffer_.undo().hasRedoStack());
 990                 break;
 991         case LFUN_FILE_INSERT:
 992         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 993         case LFUN_FILE_INSERT_PLAINTEXT:
 994         case LFUN_BOOKMARK_SAVE:
 995                 // FIXME: Actually, these LFUNS should be moved to Text
 996                 flag.setEnabled(cur.inTexted());
 997                 break;
 998
 999         case LFUN_FONT_STATE:
1000         case LFUN_LABEL_INSERT:
1001         case LFUN_INFO_INSERT:
1002         case LFUN_INSET_EDIT:
1003         case LFUN_PARAGRAPH_GOTO:
1004         case LFUN_NOTE_NEXT:
1005         case LFUN_REFERENCE_NEXT:
1006         case LFUN_WORD_FIND:
1007         case LFUN_WORD_FIND_FORWARD:
1008         case LFUN_WORD_FIND_BACKWARD:
1009         case LFUN_WORD_FINDADV:
1010         case LFUN_WORD_REPLACE:
1011         case LFUN_MARK_OFF:
1012         case LFUN_MARK_ON:
1013         case LFUN_MARK_TOGGLE:
1014         case LFUN_SCREEN_RECENTER:
1015         case LFUN_SCREEN_SHOW_CURSOR:
1016         case LFUN_BIBTEX_DATABASE_ADD:
1017         case LFUN_BIBTEX_DATABASE_DEL:
1018         case LFUN_NOTES_MUTATE:
1019         case LFUN_ALL_INSETS_TOGGLE:
1020         case LFUN_STATISTICS:
1021         case LFUN_BRANCH_ADD_INSERT:
1022         case LFUN_KEYMAP_OFF:
1023         case LFUN_KEYMAP_PRIMARY:
1024         case LFUN_KEYMAP_SECONDARY:
1025         case LFUN_KEYMAP_TOGGLE:
1026                 flag.setEnabled(true);
1027                 break;
1028
1029         case LFUN_REGEXP_MODE:
1030                 // FIXME: Test if current WorkArea is the search WorkArea
1031                 flag.setEnabled(buffer().isInternal() && !cur.inRegexped());
1032                 break;
1033
1034         case LFUN_LABEL_COPY_AS_REF: {
1035                 // if there is an inset at cursor, see whether it
1036                 // handles the lfun
1037                 Inset * inset = cur.nextInset();
1038                 if (!inset || !inset->getStatus(cur, cmd, flag))
1039                         flag.setEnabled(false);
1040                 break;
1041         }
1042
1043         case LFUN_NEXT_INSET_MODIFY: {
1044                 // this is the real function we want to invoke
1045                 FuncRequest tmpcmd = cmd;
1046                 tmpcmd.action = LFUN_INSET_MODIFY;
1047                 // if there is an inset at cursor, see whether it
1048                 // handles the lfun, other start from scratch
1049                 Inset * inset = cur.nextInset();
1050                 if (!inset || !inset->getStatus(cur, tmpcmd, flag))
1051                         flag = lyx::getStatus(tmpcmd);
1052                 break;
1053         }
1054
1055         case LFUN_LABEL_GOTO: {
1056                 flag.setEnabled(!cmd.argument().empty()
1057                     || getInsetByCode<InsetRef>(cur, REF_CODE));
1058                 break;
1059         }
1060
1061         case LFUN_CHANGES_TRACK:
1062                 flag.setEnabled(true);
1063                 flag.setOnOff(buffer_.params().trackChanges);
1064                 break;
1065
1066         case LFUN_CHANGES_OUTPUT:
1067                 flag.setEnabled(true);
1068                 flag.setOnOff(buffer_.params().outputChanges);
1069                 break;
1070
1071         case LFUN_CHANGES_MERGE:
1072         case LFUN_CHANGE_NEXT:
1073         case LFUN_CHANGE_PREVIOUS:
1074         case LFUN_ALL_CHANGES_ACCEPT:
1075         case LFUN_ALL_CHANGES_REJECT:
1076                 // TODO: context-sensitive enabling of LFUNs
1077                 // In principle, these command should only be enabled if there
1078                 // is a change in the document. However, without proper
1079                 // optimizations, this will inevitably result in poor performance.
1080                 flag.setEnabled(true);
1081                 break;
1082
1083         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
1084                 flag.setOnOff(buffer_.params().compressed);
1085                 break;
1086         }
1087
1088         case LFUN_SCREEN_UP:
1089         case LFUN_SCREEN_DOWN:
1090         case LFUN_SCROLL:
1091         case LFUN_SCREEN_UP_SELECT:
1092         case LFUN_SCREEN_DOWN_SELECT:
1093         case LFUN_INSET_FORALL:
1094                 flag.setEnabled(true);
1095                 break;
1096
1097         case LFUN_LAYOUT_TABULAR:
1098                 flag.setEnabled(cur.innerInsetOfType(TABULAR_CODE));
1099                 break;
1100
1101         case LFUN_LAYOUT:
1102                 flag.setEnabled(!cur.inset().forcePlainLayout(cur.idx()));
1103                 break;
1104
1105         case LFUN_LAYOUT_PARAGRAPH:
1106                 flag.setEnabled(cur.inset().allowParagraphCustomization(cur.idx()));
1107                 break;
1108
1109         case LFUN_DIALOG_SHOW_NEW_INSET:
1110                 // FIXME: this is wrong, but I do not understand the
1111                 // intent (JMarc)
1112                 if (cur.inset().lyxCode() == CAPTION_CODE)
1113                         return cur.inset().getStatus(cur, cmd, flag);
1114                 // FIXME we should consider passthru paragraphs too.
1115                 flag.setEnabled(!cur.inset().getLayout().isPassThru());
1116                 break;
1117
1118         case LFUN_CITATION_INSERT: {
1119                 FuncRequest fr(LFUN_INSET_INSERT, "citation");
1120                 // FIXME: This could turn in a recursive hell.
1121                 // Shouldn't we use Buffer::getStatus() instead?
1122                 flag.setEnabled(lyx::getStatus(fr).enabled());
1123                 break;
1124         }
1125         case LFUN_INSET_APPLY: {
1126                 string const name = cmd.getArg(0);
1127                 Inset * inset = editedInset(name);
1128                 if (inset) {
1129                         FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1130                         FuncStatus fs;
1131                         if (!inset->getStatus(cur, fr, fs)) {
1132                                 // Every inset is supposed to handle this
1133                                 LASSERT(false, break);
1134                         }
1135                         flag |= fs;
1136                 } else {
1137                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1138                         flag |= lyx::getStatus(fr);
1139                 }
1140                 break;
1141         }
1142
1143         default:
1144                 flag.setEnabled(false);
1145                 return false;
1146         }
1147
1148         return true;
1149 }
1150
1151
1152 Inset * BufferView::editedInset(string const & name) const
1153 {
1154         map<string, Inset *>::const_iterator it = d->edited_insets_.find(name);
1155         return it == d->edited_insets_.end() ? 0 : it->second;
1156 }
1157
1158
1159 void BufferView::editInset(string const & name, Inset * inset)
1160 {
1161         d->edited_insets_[name] = inset;
1162 }
1163
1164
1165 bool BufferView::dispatch(FuncRequest const & cmd)
1166 {
1167         //lyxerr << [ cmd = " << cmd << "]" << endl;
1168
1169         // Make sure that the cached BufferView is correct.
1170         LYXERR(Debug::ACTION, " action[" << cmd.action << ']'
1171                 << " arg[" << to_utf8(cmd.argument()) << ']'
1172                 << " x[" << cmd.x << ']'
1173                 << " y[" << cmd.y << ']'
1174                 << " button[" << cmd.button() << ']');
1175
1176         string const argument = to_utf8(cmd.argument());
1177         Cursor & cur = d->cursor_;
1178
1179         // Don't dispatch function that does not apply to internal buffers.
1180         if (buffer_.isInternal()
1181             && lyxaction.funcHasFlag(cmd.action, LyXAction::NoInternal))
1182                 return false;
1183
1184         // We'll set this back to false if need be.
1185         bool dispatched = true;
1186         buffer_.undo().beginUndoGroup();
1187
1188         switch (cmd.action) {
1189
1190         case LFUN_BUFFER_PARAMS_APPLY: {
1191                 DocumentClass const * const oldClass = buffer_.params().documentClassPtr();
1192                 cur.recordUndoFullDocument();
1193                 istringstream ss(to_utf8(cmd.argument()));
1194                 Lexer lex;
1195                 lex.setStream(ss);
1196                 int const unknown_tokens = buffer_.readHeader(lex);
1197                 if (unknown_tokens != 0) {
1198                         LYXERR0("Warning in LFUN_BUFFER_PARAMS_APPLY!\n"
1199                                                 << unknown_tokens << " unknown token"
1200                                                 << (unknown_tokens == 1 ? "" : "s"));
1201                 }
1202                 updateLayout(oldClass);
1203
1204                 // We are most certainly here because of a change in the document
1205                 // It is then better to make sure that all dialogs are in sync with
1206                 // current document settings.
1207                 processUpdateFlags(Update::Force | Update::FitCursor);
1208                 break;
1209         }
1210
1211         case LFUN_LAYOUT_MODULES_CLEAR: {
1212                 DocumentClass const * const oldClass =
1213                         buffer_.params().documentClassPtr();
1214                 cur.recordUndoFullDocument();
1215                 buffer_.params().clearLayoutModules();
1216                 buffer_.params().makeDocumentClass();
1217                 updateLayout(oldClass);
1218                 processUpdateFlags(Update::Force | Update::FitCursor);
1219                 break;
1220         }
1221
1222         case LFUN_LAYOUT_MODULE_ADD: {
1223                 BufferParams const & params = buffer_.params();
1224                 if (!params.moduleCanBeAdded(argument)) {
1225                         LYXERR0("Module `" << argument <<
1226                                 "' cannot be added due to failed requirements or "
1227                                 "conflicts with installed modules.");
1228                         break;
1229                 }
1230                 DocumentClass const * const oldClass = params.documentClassPtr();
1231                 cur.recordUndoFullDocument();
1232                 buffer_.params().addLayoutModule(argument);
1233                 buffer_.params().makeDocumentClass();
1234                 updateLayout(oldClass);
1235                 processUpdateFlags(Update::Force | Update::FitCursor);
1236                 break;
1237         }
1238
1239         case LFUN_TEXTCLASS_APPLY: {
1240                 if (!LayoutFileList::get().load(argument, buffer_.temppath()) &&
1241                         !LayoutFileList::get().load(argument, buffer_.filePath()))
1242                         break;
1243
1244                 LayoutFile const * old_layout = buffer_.params().baseClass();
1245                 LayoutFile const * new_layout = &(LayoutFileList::get()[argument]);
1246
1247                 if (old_layout == new_layout)
1248                         // nothing to do
1249                         break;
1250
1251                 //Save the old, possibly modular, layout for use in conversion.
1252                 DocumentClass const * const oldDocClass =
1253                         buffer_.params().documentClassPtr();
1254                 cur.recordUndoFullDocument();
1255                 buffer_.params().setBaseClass(argument);
1256                 buffer_.params().makeDocumentClass();
1257                 updateLayout(oldDocClass);
1258                 processUpdateFlags(Update::Force | Update::FitCursor);
1259                 break;
1260         }
1261
1262         case LFUN_TEXTCLASS_LOAD:
1263                 LayoutFileList::get().load(argument, buffer_.temppath()) ||
1264                 LayoutFileList::get().load(argument, buffer_.filePath());
1265                 break;
1266
1267         case LFUN_LAYOUT_RELOAD: {
1268                 DocumentClass const * const oldClass = buffer_.params().documentClassPtr();
1269                 LayoutFileIndex bc = buffer_.params().baseClassID();
1270                 LayoutFileList::get().reset(bc);
1271                 buffer_.params().setBaseClass(bc);
1272                 buffer_.params().makeDocumentClass();
1273                 updateLayout(oldClass);
1274                 processUpdateFlags(Update::Force | Update::FitCursor);
1275                 break;
1276         }
1277
1278         case LFUN_UNDO:
1279                 cur.message(_("Undo"));
1280                 cur.clearSelection();
1281                 if (!cur.textUndo())
1282                         cur.message(_("No further undo information"));
1283                 else
1284                         processUpdateFlags(Update::Force | Update::FitCursor);
1285                 break;
1286
1287         case LFUN_REDO:
1288                 cur.message(_("Redo"));
1289                 cur.clearSelection();
1290                 if (!cur.textRedo())
1291                         cur.message(_("No further redo information"));
1292                 else
1293                         processUpdateFlags(Update::Force | Update::FitCursor);
1294                 break;
1295
1296         case LFUN_FONT_STATE:
1297                 cur.message(cur.currentState());
1298                 break;
1299
1300         case LFUN_BOOKMARK_SAVE:
1301                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1302                 break;
1303
1304         case LFUN_LABEL_GOTO: {
1305                 docstring label = cmd.argument();
1306                 if (label.empty()) {
1307                         InsetRef * inset =
1308                                 getInsetByCode<InsetRef>(cur, REF_CODE);
1309                         if (inset) {
1310                                 label = inset->getParam("reference");
1311                                 // persistent=false: use temp_bookmark
1312                                 saveBookmark(0);
1313                         }
1314                 }
1315                 if (!label.empty())
1316                         gotoLabel(label);
1317                 break;
1318         }
1319
1320         case LFUN_INSET_EDIT: {
1321                 FuncRequest fr(cmd);
1322                 // if there is an inset at cursor, see whether it
1323                 // can be modified.
1324                 Inset * inset = cur.nextInset();
1325                 if (inset)
1326                         inset->dispatch(cur, fr);
1327                 // if it did not work, try the underlying inset.
1328                 if (!inset || !cur.result().dispatched())
1329                         cur.dispatch(cmd);
1330
1331                 // FIXME I'm adding the last break to solve a crash,
1332                 // but that is obviously not right.
1333                 if (!cur.result().dispatched())
1334                         // It did not work too; no action needed.
1335                         break;
1336                 break;
1337         }
1338
1339         case LFUN_PARAGRAPH_GOTO: {
1340                 int const id = convert<int>(cmd.getArg(0));
1341                 int const pos = convert<int>(cmd.getArg(1));
1342                 int i = 0;
1343                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1344                         b = theBufferList().next(b)) {
1345
1346                         DocIterator dit = b->getParFromID(id);
1347                         if (dit.atEnd()) {
1348                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1349                                 ++i;
1350                                 continue;
1351                         }
1352                         LYXERR(Debug::INFO, "Paragraph " << dit.paragraph().id()
1353                                 << " found in buffer `"
1354                                 << b->absFileName() << "'.");
1355
1356                         if (b == &buffer_) {
1357                                 // Set the cursor
1358                                 dit.pos() = pos;
1359                                 setCursor(dit);
1360                                 processUpdateFlags(Update::Force | Update::FitCursor);
1361                         } else {
1362                                 // Switch to other buffer view and resend cmd
1363                                 theLyXFunc().dispatch(FuncRequest(
1364                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1365                                 theLyXFunc().dispatch(cmd);
1366                         }
1367                         break;
1368                 }
1369                 break;
1370         }
1371
1372         case LFUN_NOTE_NEXT:
1373                 gotoInset(this, NOTE_CODE, false);
1374                 break;
1375
1376         case LFUN_REFERENCE_NEXT: {
1377                 vector<InsetCode> tmp;
1378                 tmp.push_back(LABEL_CODE);
1379                 tmp.push_back(REF_CODE);
1380                 gotoInset(this, tmp, true);
1381                 break;
1382         }
1383
1384         case LFUN_CHANGES_TRACK:
1385                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
1386                 break;
1387
1388         case LFUN_CHANGES_OUTPUT:
1389                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
1390                 if (buffer_.params().outputChanges) {
1391                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
1392                         bool xcolorulem = LaTeXFeatures::isAvailable("ulem") &&
1393                                           LaTeXFeatures::isAvailable("xcolor");
1394
1395                         if (!dvipost && !xcolorulem) {
1396                                 Alert::warning(_("Changes not shown in LaTeX output"),
1397                                                _("Changes will not be highlighted in LaTeX output, "
1398                                                  "because neither dvipost nor xcolor/ulem are installed.\n"
1399                                                  "Please install these packages or redefine "
1400                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1401                         } else if (!xcolorulem) {
1402                                 Alert::warning(_("Changes not shown in LaTeX output"),
1403                                                _("Changes will not be highlighted in LaTeX output "
1404                                                  "when using pdflatex, because xcolor and ulem are not installed.\n"
1405                                                  "Please install both packages or redefine "
1406                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1407                         }
1408                 }
1409                 break;
1410
1411         case LFUN_CHANGE_NEXT:
1412                 findNextChange(this);
1413                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1414                 processUpdateFlags(Update::Force | Update::FitCursor);
1415                 break;
1416
1417         case LFUN_CHANGE_PREVIOUS:
1418                 findPreviousChange(this);
1419                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1420                 processUpdateFlags(Update::Force | Update::FitCursor);
1421                 break;
1422
1423         case LFUN_CHANGES_MERGE:
1424                 if (findNextChange(this) || findPreviousChange(this)) {
1425                         processUpdateFlags(Update::Force | Update::FitCursor);
1426                         showDialog("changes");
1427                 }
1428                 break;
1429
1430         case LFUN_ALL_CHANGES_ACCEPT:
1431                 // select complete document
1432                 cur.reset();
1433                 cur.selHandle(true);
1434                 buffer_.text().cursorBottom(cur);
1435                 // accept everything in a single step to support atomic undo
1436                 buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
1437                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1438                 processUpdateFlags(Update::Force | Update::FitCursor);
1439                 break;
1440
1441         case LFUN_ALL_CHANGES_REJECT:
1442                 // select complete document
1443                 cur.reset();
1444                 cur.selHandle(true);
1445                 buffer_.text().cursorBottom(cur);
1446                 // reject everything in a single step to support atomic undo
1447                 // Note: reject does not work recursively; the user may have to repeat the operation
1448                 buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
1449                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1450                 processUpdateFlags(Update::Force | Update::FitCursor);
1451                 break;
1452
1453         case LFUN_WORD_FIND_FORWARD:
1454         case LFUN_WORD_FIND_BACKWARD: {
1455                 static docstring last_search;
1456                 docstring searched_string;
1457
1458                 if (!cmd.argument().empty()) {
1459                         last_search = cmd.argument();
1460                         searched_string = cmd.argument();
1461                 } else {
1462                         searched_string = last_search;
1463                 }
1464
1465                 if (searched_string.empty())
1466                         break;
1467
1468                 bool const fw = cmd.action == LFUN_WORD_FIND_FORWARD;
1469                 docstring const data =
1470                         find2string(searched_string, true, false, fw);
1471                 find(this, FuncRequest(LFUN_WORD_FIND, data));
1472                 break;
1473         }
1474
1475         case LFUN_WORD_FIND: {
1476                 FuncRequest req = cmd;
1477                 if (cmd.argument().empty() && !d->search_request_cache_.argument().empty())
1478                         req = d->search_request_cache_;
1479                 if (req.argument().empty()) {
1480                         theLyXFunc().dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
1481                         break;
1482                 }
1483                 if (find(this, req))
1484                         showCursor();
1485                 else
1486                         message(_("String not found!"));
1487                 d->search_request_cache_ = req;
1488                 break;
1489         }
1490
1491         case LFUN_WORD_REPLACE: {
1492                 bool has_deleted = false;
1493                 if (cur.selection()) {
1494                         DocIterator beg = cur.selectionBegin();
1495                         DocIterator end = cur.selectionEnd();
1496                         if (beg.pit() == end.pit()) {
1497                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1498                                         if (cur.paragraph().isDeleted(p))
1499                                                 has_deleted = true;
1500                                 }
1501                         }
1502                 }
1503                 replace(this, cmd, has_deleted);
1504                 break;
1505         }
1506
1507         case LFUN_WORD_FINDADV:
1508                 findAdv(this, cmd);
1509                 break;
1510
1511         case LFUN_MARK_OFF:
1512                 cur.clearSelection();
1513                 cur.message(from_utf8(N_("Mark off")));
1514                 break;
1515
1516         case LFUN_MARK_ON:
1517                 cur.clearSelection();
1518                 cur.setMark(true);
1519                 cur.message(from_utf8(N_("Mark on")));
1520                 break;
1521
1522         case LFUN_MARK_TOGGLE:
1523                 cur.setSelection(false);
1524                 if (cur.mark()) {
1525                         cur.setMark(false);
1526                         cur.message(from_utf8(N_("Mark removed")));
1527                 } else {
1528                         cur.setMark(true);
1529                         cur.message(from_utf8(N_("Mark set")));
1530                 }
1531                 cur.resetAnchor();
1532                 break;
1533
1534         case LFUN_SCREEN_SHOW_CURSOR:
1535                 showCursor();
1536                 break;
1537
1538         case LFUN_SCREEN_RECENTER:
1539                 recenter();
1540                 break;
1541
1542         case LFUN_BIBTEX_DATABASE_ADD: {
1543                 Cursor tmpcur = cur;
1544                 findInset(tmpcur, BIBTEX_CODE, false);
1545                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1546                                                 BIBTEX_CODE);
1547                 if (inset) {
1548                         if (inset->addDatabase(cmd.argument()))
1549                                 buffer_.updateBibfilesCache();
1550                 }
1551                 break;
1552         }
1553
1554         case LFUN_BIBTEX_DATABASE_DEL: {
1555                 Cursor tmpcur = cur;
1556                 findInset(tmpcur, BIBTEX_CODE, false);
1557                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1558                                                 BIBTEX_CODE);
1559                 if (inset) {
1560                         if (inset->delDatabase(cmd.argument()))
1561                                 buffer_.updateBibfilesCache();
1562                 }
1563                 break;
1564         }
1565
1566         case LFUN_STATISTICS: {
1567                 DocIterator from, to;
1568                 if (cur.selection()) {
1569                         from = cur.selectionBegin();
1570                         to = cur.selectionEnd();
1571                 } else {
1572                         from = doc_iterator_begin(&buffer_);
1573                         to = doc_iterator_end(&buffer_);
1574                 }
1575                 int const words = countWords(from, to);
1576                 int const chars = countChars(from, to, false);
1577                 int const chars_blanks = countChars(from, to, true);
1578                 docstring message;
1579                 if (cur.selection())
1580                         message = _("Statistics for the selection:");
1581                 else
1582                         message = _("Statistics for the document:");
1583                 message += "\n\n";
1584                 if (words != 1)
1585                         message += bformat(_("%1$d words"), words);
1586                 else
1587                         message += _("One word");
1588                 message += "\n";
1589                 if (chars_blanks != 1)
1590                         message += bformat(_("%1$d characters (including blanks)"),
1591                                           chars_blanks);
1592                 else
1593                         message += _("One character (including blanks)");
1594                 message += "\n";
1595                 if (chars != 1)
1596                         message += bformat(_("%1$d characters (excluding blanks)"),
1597                                           chars);
1598                 else
1599                         message += _("One character (excluding blanks)");
1600
1601                 Alert::information(_("Statistics"), message);
1602         }
1603                 break;
1604
1605         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1606                 // turn compression on/off
1607                 buffer_.params().compressed = !buffer_.params().compressed;
1608                 break;
1609
1610         case LFUN_LABEL_COPY_AS_REF: {
1611                 // if there is an inset at cursor, try to copy it
1612                 Inset * inset = &cur.inset();
1613                 if (!inset || !inset->asInsetMath())
1614                         inset = cur.nextInset();
1615                 if (inset) {
1616                         FuncRequest tmpcmd = cmd;
1617                         inset->dispatch(cur, tmpcmd);
1618                 }
1619                 if (!cur.result().dispatched())
1620                         // It did not work too; no action needed.
1621                         break;
1622                 cur.clearSelection();
1623                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1624                 break;
1625         }
1626
1627         case LFUN_NEXT_INSET_MODIFY: {
1628                 // create the the real function we want to invoke
1629                 FuncRequest tmpcmd = cmd;
1630                 tmpcmd.action = LFUN_INSET_MODIFY;
1631                 // if there is an inset at cursor, see whether it
1632                 // can be modified.
1633                 Inset * inset = cur.nextInset();
1634                 if (inset) {
1635                         cur.recordUndo();
1636                         inset->dispatch(cur, tmpcmd);
1637                 }
1638                 // if it did not work, try the underlying inset.
1639                 if (!inset || !cur.result().dispatched()) {
1640                         cur.recordUndo();
1641                         cur.dispatch(tmpcmd);
1642                 }
1643
1644                 if (!cur.result().dispatched())
1645                         // It did not work too; no action needed.
1646                         break;
1647                 cur.clearSelection();
1648                 processUpdateFlags(Update::Force | Update::FitCursor);
1649                 break;
1650         }
1651
1652         case LFUN_SCREEN_UP:
1653         case LFUN_SCREEN_DOWN: {
1654                 Point p = getPos(cur, cur.boundary());
1655                 // This code has been commented out to enable to scroll down a
1656                 // document, even if there are large insets in it (see bug #5465).
1657                 /*if (p.y_ < 0 || p.y_ > height_) {
1658                         // The cursor is off-screen so recenter before proceeding.
1659                         showCursor();
1660                         p = getPos(cur, cur.boundary());
1661                 }*/
1662                 int const scrolled = scroll(cmd.action == LFUN_SCREEN_UP
1663                         ? -height_ : height_);
1664                 if (cmd.action == LFUN_SCREEN_UP && scrolled > -height_)
1665                         p = Point(0, 0);
1666                 if (cmd.action == LFUN_SCREEN_DOWN && scrolled < height_)
1667                         p = Point(width_, height_);
1668                 Cursor old = cur;
1669                 bool const in_texted = cur.inTexted();
1670                 cur.reset();
1671                 updateMetrics();
1672                 buffer_.changed();
1673                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
1674                         true, cmd.action == LFUN_SCREEN_UP);
1675                 //FIXME: what to do with cur.x_target()?
1676                 bool update = in_texted && cur.bv().checkDepm(cur, old);
1677                 cur.finishUndo();
1678                 if (update)
1679                         processUpdateFlags(Update::Force | Update::FitCursor);
1680                 break;
1681         }
1682
1683         case LFUN_SCROLL:
1684                 lfunScroll(cmd);
1685                 break;
1686
1687         case LFUN_SCREEN_UP_SELECT: {
1688                 cur.selHandle(true);
1689                 if (isTopScreen()) {
1690                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1691                         cur.finishUndo();
1692                         break;
1693                 }
1694                 int y = getPos(cur, cur.boundary()).y_;
1695                 int const ymin = y - height_ + defaultRowHeight();
1696                 while (y > ymin && cur.up())
1697                         y = getPos(cur, cur.boundary()).y_;
1698
1699                 cur.finishUndo();
1700                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1701                 break;
1702         }
1703
1704         case LFUN_SCREEN_DOWN_SELECT: {
1705                 cur.selHandle(true);
1706                 if (isBottomScreen()) {
1707                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1708                         cur.finishUndo();
1709                         break;
1710                 }
1711                 int y = getPos(cur, cur.boundary()).y_;
1712                 int const ymax = y + height_ - defaultRowHeight();
1713                 while (y < ymax && cur.down())
1714                         y = getPos(cur, cur.boundary()).y_;
1715
1716                 cur.finishUndo();
1717                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1718                 break;
1719         }
1720
1721         // This could be rewriten using some command like forall <insetname> <command>
1722         // once the insets refactoring is done.
1723         case LFUN_NOTES_MUTATE: {
1724                 if (cmd.argument().empty())
1725                         break;
1726
1727                 if (mutateNotes(cur, cmd.getArg(0), cmd.getArg(1))) {
1728                         processUpdateFlags(Update::Force);
1729                 }
1730                 break;
1731         }
1732
1733
1734         // This would be in Buffer class if only Cursor did not
1735         // require a bufferview
1736         case LFUN_INSET_FORALL: {
1737                 docstring const name = from_utf8(cmd.getArg(0));
1738                 string const commandstr = cmd.getLongArg(1);
1739                 FuncRequest const fr = lyxaction.lookupFunc(commandstr);
1740
1741                 // an arbitrary number to limit number of iterations
1742                 const int max_iter = 1000;
1743                 int iterations = 0;
1744                 Cursor & cur = d->cursor_;
1745                 cur.reset();
1746                 if (!cur.nextInset())
1747                         cur.forwardInset();
1748                 cur.beginUndoGroup();
1749                 while(cur && iterations < max_iter) {
1750                         Inset * ins = cur.nextInset();
1751                         if (!ins)
1752                                 break;
1753                         docstring insname = ins->name();
1754                         while (!insname.empty()) {
1755                                 if (insname == name || name == from_utf8("*")) {
1756                                         cur.recordUndo();
1757                                         lyx::dispatch(fr);
1758                                         ++iterations;
1759                                         break;
1760                                 }
1761                                 size_t const i = insname.rfind(':');
1762                                 if (i == string::npos)
1763                                         break;
1764                                 insname = insname.substr(0, i);
1765                         }
1766                         cur.forwardInset();
1767                 }
1768                 cur.endUndoGroup();
1769                 cur.reset();
1770                 processUpdateFlags(Update::Force);
1771
1772                 if (iterations >= max_iter)
1773                         cur.errorMessage(bformat(_("inset-forall interrupted because number of actions is larger than %1$s"), max_iter));
1774                 else
1775                         cur.message(bformat(_("Applied \"%1$s\" to %2$d insets"), from_utf8(commandstr), iterations));
1776                 break;
1777         }
1778
1779
1780         case LFUN_ALL_INSETS_TOGGLE: {
1781                 string action;
1782                 string const name = split(to_utf8(cmd.argument()), action, ' ');
1783                 InsetCode const inset_code = insetCode(name);
1784
1785                 FuncRequest fr(LFUN_INSET_TOGGLE, action);
1786
1787                 Inset & inset = cur.buffer()->inset();
1788                 InsetIterator it  = inset_iterator_begin(inset);
1789                 InsetIterator const end = inset_iterator_end(inset);
1790                 for (; it != end; ++it) {
1791                         if (it->asInsetCollapsable()
1792                             && (inset_code == NO_CODE
1793                             || inset_code == it->lyxCode())) {
1794                                 Cursor tmpcur = cur;
1795                                 tmpcur.pushBackward(*it);
1796                                 it->dispatch(tmpcur, fr);
1797                         }
1798                 }
1799                 processUpdateFlags(Update::Force | Update::FitCursor);
1800                 break;
1801         }
1802
1803         case LFUN_BRANCH_ADD_INSERT: {
1804                 docstring branch_name = from_utf8(cmd.getArg(0));
1805                 if (branch_name.empty())
1806                         if (!Alert::askForText(branch_name, _("Branch name")) ||
1807                                                 branch_name.empty())
1808                                 break;
1809
1810                 DispatchResult drtmp;
1811                 buffer_.dispatch(FuncRequest(LFUN_BRANCH_ADD, branch_name), drtmp);
1812                 if (drtmp.error()) {
1813                         Alert::warning(_("Branch already exists"), drtmp.message());
1814                         break;
1815                 }
1816                 lyx::dispatch(FuncRequest(LFUN_BRANCH_INSERT, branch_name));
1817                 break;
1818         }
1819
1820         case LFUN_KEYMAP_OFF:
1821                 getIntl().keyMapOn(false);
1822                 break;
1823
1824         case LFUN_KEYMAP_PRIMARY:
1825                 getIntl().keyMapPrim();
1826                 break;
1827
1828         case LFUN_KEYMAP_SECONDARY:
1829                 getIntl().keyMapSec();
1830                 break;
1831
1832         case LFUN_KEYMAP_TOGGLE:
1833                 getIntl().toggleKeyMap();
1834                 break;
1835
1836         case LFUN_DIALOG_SHOW_NEW_INSET: {
1837                 string const name = cmd.getArg(0);
1838                 string data = trim(to_utf8(cmd.argument()).substr(name.size()));
1839                 if (decodeInsetParam(name, data, buffer_))
1840                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, name + " " + data));
1841                 else
1842                         lyxerr << "Inset type '" << name <<
1843                         "' not recognized in LFUN_DIALOG_SHOW_NEW_INSET" <<  endl;
1844                 break;
1845         }
1846
1847         case LFUN_CITATION_INSERT: {
1848                 if (argument.empty()) {
1849                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW_NEW_INSET, "citation"));
1850                         break;
1851                 }
1852                 // we can have one optional argument, delimited by '|'
1853                 // citation-insert <key>|<text_before>
1854                 // this should be enhanced to also support text_after
1855                 // and citation style
1856                 string arg = argument;
1857                 string opt1;
1858                 if (contains(argument, "|")) {
1859                         arg = token(argument, '|', 0);
1860                         opt1 = token(argument, '|', 1);
1861                 }
1862                 InsetCommandParams icp(CITE_CODE);
1863                 icp["key"] = from_utf8(arg);
1864                 if (!opt1.empty())
1865                         icp["before"] = from_utf8(opt1);
1866                 string icstr = InsetCommand::params2string("citation", icp);
1867                 FuncRequest fr(LFUN_INSET_INSERT, icstr);
1868                 lyx::dispatch(fr);
1869                 break;
1870         }
1871
1872         case LFUN_INSET_APPLY: {
1873                 string const name = cmd.getArg(0);
1874                 Inset * inset = editedInset(name);
1875                 if (!inset) {
1876                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1877                         lyx::dispatch(fr);
1878                         break;
1879                 }
1880                 // put cursor in front of inset.
1881                 if (!setCursorFromInset(inset)) {
1882                         LASSERT(false, break);
1883                 }
1884                 cur.recordUndo();
1885                 FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1886                 inset->dispatch(cur, fr);
1887                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1888                 break;
1889         }
1890
1891         default:
1892                 dispatched = false;
1893                 break;
1894         }
1895
1896         buffer_.undo().endUndoGroup();
1897         return dispatched;
1898 }
1899
1900
1901 docstring const BufferView::requestSelection()
1902 {
1903         Cursor & cur = d->cursor_;
1904
1905         LYXERR(Debug::SELECTION, "requestSelection: cur.selection: " << cur.selection());
1906         if (!cur.selection()) {
1907                 d->xsel_cache_.set = false;
1908                 return docstring();
1909         }
1910
1911         LYXERR(Debug::SELECTION, "requestSelection: xsel_cache.set: " << d->xsel_cache_.set);
1912         if (!d->xsel_cache_.set ||
1913             cur.top() != d->xsel_cache_.cursor ||
1914             cur.anchor_.top() != d->xsel_cache_.anchor)
1915         {
1916                 d->xsel_cache_.cursor = cur.top();
1917                 d->xsel_cache_.anchor = cur.anchor_.top();
1918                 d->xsel_cache_.set = cur.selection();
1919                 return cur.selectionAsString(false);
1920         }
1921         return docstring();
1922 }
1923
1924
1925 void BufferView::clearSelection()
1926 {
1927         d->cursor_.clearSelection();
1928         // Clear the selection buffer. Otherwise a subsequent
1929         // middle-mouse-button paste would use the selection buffer,
1930         // not the more current external selection.
1931         cap::clearSelection();
1932         d->xsel_cache_.set = false;
1933         // The buffer did not really change, but this causes the
1934         // redraw we need because we cleared the selection above.
1935         buffer_.changed();
1936 }
1937
1938
1939 void BufferView::resize(int width, int height)
1940 {
1941         // Update from work area
1942         width_ = width;
1943         height_ = height;
1944
1945         // Clear the paragraph height cache.
1946         d->par_height_.clear();
1947         // Redo the metrics.
1948         updateMetrics();
1949 }
1950
1951
1952 Inset const * BufferView::getCoveringInset(Text const & text,
1953                 int x, int y) const
1954 {
1955         TextMetrics & tm = d->text_metrics_[&text];
1956         Inset * inset = tm.checkInsetHit(x, y);
1957         if (!inset)
1958                 return 0;
1959
1960         if (!inset->descendable(*this))
1961                 // No need to go further down if the inset is not
1962                 // descendable.
1963                 return inset;
1964
1965         size_t cell_number = inset->nargs();
1966         // Check all the inner cell.
1967         for (size_t i = 0; i != cell_number; ++i) {
1968                 Text const * inner_text = inset->getText(i);
1969                 if (inner_text) {
1970                         // Try deeper.
1971                         Inset const * inset_deeper =
1972                                 getCoveringInset(*inner_text, x, y);
1973                         if (inset_deeper)
1974                                 return inset_deeper;
1975                 }
1976         }
1977
1978         return inset;
1979 }
1980
1981
1982 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
1983 {
1984         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
1985
1986         // This is only called for mouse related events including
1987         // LFUN_FILE_OPEN generated by drag-and-drop.
1988         FuncRequest cmd = cmd0;
1989
1990         Cursor old = cursor();
1991         Cursor cur(*this);
1992         cur.push(buffer_.inset());
1993         cur.setSelection(d->cursor_.selection());
1994
1995         // Either the inset under the cursor or the
1996         // surrounding Text will handle this event.
1997
1998         // make sure we stay within the screen...
1999         cmd.y = min(max(cmd.y, -1), height_);
2000
2001         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
2002
2003                 // Get inset under mouse, if there is one.
2004                 Inset const * covering_inset =
2005                         getCoveringInset(buffer_.text(), cmd.x, cmd.y);
2006                 if (covering_inset == d->last_inset_)
2007                         // Same inset, no need to do anything...
2008                         return;
2009
2010                 bool need_redraw = false;
2011                 // const_cast because of setMouseHover().
2012                 Inset * inset = const_cast<Inset *>(covering_inset);
2013                 if (d->last_inset_)
2014                         // Remove the hint on the last hovered inset (if any).
2015                         need_redraw |= d->last_inset_->setMouseHover(false);
2016                 if (inset)
2017                         // Highlighted the newly hovered inset (if any).
2018                         need_redraw |= inset->setMouseHover(true);
2019                 d->last_inset_ = inset;
2020                 if (!need_redraw)
2021                         return;
2022
2023                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
2024                         << cmd.x << ", " << cmd.y << ")");
2025
2026                 d->update_strategy_ = DecorationUpdate;
2027
2028                 // This event (moving without mouse click) is not passed further.
2029                 // This should be changed if it is further utilized.
2030                 buffer_.changed();
2031                 return;
2032         }
2033
2034         // Build temporary cursor.
2035         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x, cmd.y);
2036
2037         // Put anchor at the same position.
2038         cur.resetAnchor();
2039
2040         cur.beginUndoGroup();
2041
2042         // Try to dispatch to an non-editable inset near this position
2043         // via the temp cursor. If the inset wishes to change the real
2044         // cursor it has to do so explicitly by using
2045         //  cur.bv().cursor() = cur;  (or similar)
2046         if (inset)
2047                 inset->dispatch(cur, cmd);
2048
2049         // Now dispatch to the temporary cursor. If the real cursor should
2050         // be modified, the inset's dispatch has to do so explicitly.
2051         if (!inset || !cur.result().dispatched())
2052                 cur.dispatch(cmd);
2053
2054         cur.endUndoGroup();
2055
2056         // Notify left insets
2057         if (cur != old) {
2058                 old.fixIfBroken();
2059                 bool badcursor = notifyCursorLeavesOrEnters(old, cur);
2060                 if (badcursor)
2061                         cursor().fixIfBroken();
2062         }
2063
2064         // Do we have a selection?
2065         theSelection().haveSelection(cursor().selection());
2066
2067         // If the command has been dispatched,
2068         if (cur.result().dispatched() || cur.result().update())
2069                 processUpdateFlags(cur.result().update());
2070 }
2071
2072
2073 void BufferView::lfunScroll(FuncRequest const & cmd)
2074 {
2075         string const scroll_type = cmd.getArg(0);
2076         int const scroll_step =
2077                 (scroll_type == "line") ? d->scrollbarParameters_.single_step
2078                 : (scroll_type == "page") ? d->scrollbarParameters_.page_step : 0;
2079         if (scroll_step == 0)
2080                 return;
2081         string const scroll_quantity = cmd.getArg(1);
2082         if (scroll_quantity == "up")
2083                 scrollUp(scroll_step);
2084         else if (scroll_quantity == "down")
2085                 scrollDown(scroll_step);
2086         else {
2087                 int const scroll_value = convert<int>(scroll_quantity);
2088                 if (scroll_value)
2089                         scroll(scroll_step * scroll_value);
2090         }
2091         updateMetrics();
2092         buffer_.changed();
2093 }
2094
2095
2096 int BufferView::minVisiblePart()
2097 {
2098         return 2 * defaultRowHeight();
2099 }
2100
2101
2102 int BufferView::scroll(int y)
2103 {
2104         if (y > 0)
2105                 return scrollDown(y);
2106         if (y < 0)
2107                 return scrollUp(-y);
2108         return 0;
2109 }
2110
2111
2112 int BufferView::scrollDown(int offset)
2113 {
2114         Text * text = &buffer_.text();
2115         TextMetrics & tm = d->text_metrics_[text];
2116         int const ymax = height_ + offset;
2117         while (true) {
2118                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
2119                 int bottom_pos = last.second->position() + last.second->descent();
2120                 if (lyxrc.scroll_below_document)
2121                         bottom_pos += height_ - minVisiblePart();
2122                 if (last.first + 1 == int(text->paragraphs().size())) {
2123                         if (bottom_pos <= height_)
2124                                 return 0;
2125                         offset = min(offset, bottom_pos - height_);
2126                         break;
2127                 }
2128                 if (bottom_pos > ymax)
2129                         break;
2130                 tm.newParMetricsDown();
2131         }
2132         d->anchor_ypos_ -= offset;
2133         return -offset;
2134 }
2135
2136
2137 int BufferView::scrollUp(int offset)
2138 {
2139         Text * text = &buffer_.text();
2140         TextMetrics & tm = d->text_metrics_[text];
2141         int ymin = - offset;
2142         while (true) {
2143                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
2144                 int top_pos = first.second->position() - first.second->ascent();
2145                 if (first.first == 0) {
2146                         if (top_pos >= 0)
2147                                 return 0;
2148                         offset = min(offset, - top_pos);
2149                         break;
2150                 }
2151                 if (top_pos < ymin)
2152                         break;
2153                 tm.newParMetricsUp();
2154         }
2155         d->anchor_ypos_ += offset;
2156         return offset;
2157 }
2158
2159
2160 void BufferView::setCursorFromRow(int row)
2161 {
2162         int tmpid = -1;
2163         int tmppos = -1;
2164
2165         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
2166
2167         d->cursor_.reset();
2168         if (tmpid == -1)
2169                 buffer_.text().setCursor(d->cursor_, 0, 0);
2170         else
2171                 buffer_.text().setCursor(d->cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
2172         recenter();
2173 }
2174
2175
2176 bool BufferView::setCursorFromInset(Inset const * inset)
2177 {
2178         // are we already there?
2179         if (cursor().nextInset() == inset)
2180                 return true;
2181
2182         // Inset is not at cursor position. Find it in the document.
2183         Cursor cur(*this);
2184         cur.reset();
2185         while (cur && cur.nextInset() != inset)
2186                 cur.forwardInset();
2187
2188         if (cur) {
2189                 setCursor(cur);
2190                 return true;
2191         }
2192         return false;
2193 }
2194
2195
2196 void BufferView::gotoLabel(docstring const & label)
2197 {
2198         std::vector<Buffer const *> bufs = buffer().allRelatives();
2199         std::vector<Buffer const *>::iterator it = bufs.begin();
2200         for (; it != bufs.end(); ++it) {
2201                 Buffer const * buf = *it;
2202
2203                 // find label
2204                 Toc & toc = buf->tocBackend().toc("label");
2205                 TocIterator toc_it = toc.begin();
2206                 TocIterator end = toc.end();
2207                 for (; toc_it != end; ++toc_it) {
2208                         if (label == toc_it->str()) {
2209                                 dispatch(toc_it->action());
2210                                 return;
2211                         }
2212                 }
2213         }
2214 }
2215
2216
2217 TextMetrics const & BufferView::textMetrics(Text const * t) const
2218 {
2219         return const_cast<BufferView *>(this)->textMetrics(t);
2220 }
2221
2222
2223 TextMetrics & BufferView::textMetrics(Text const * t)
2224 {
2225         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
2226         if (tmc_it == d->text_metrics_.end()) {
2227                 tmc_it = d->text_metrics_.insert(
2228                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
2229         }
2230         return tmc_it->second;
2231 }
2232
2233
2234 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
2235                 pit_type pit) const
2236 {
2237         return textMetrics(t).parMetrics(pit);
2238 }
2239
2240
2241 int BufferView::workHeight() const
2242 {
2243         return height_;
2244 }
2245
2246
2247 void BufferView::setCursor(DocIterator const & dit)
2248 {
2249         d->cursor_.reset();
2250         size_t const n = dit.depth();
2251         for (size_t i = 0; i < n; ++i)
2252                 dit[i].inset().edit(d->cursor_, true);
2253
2254         d->cursor_.setCursor(dit);
2255         d->cursor_.setSelection(false);
2256 }
2257
2258
2259 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
2260 {
2261         // Would be wrong to delete anything if we have a selection.
2262         if (cur.selection())
2263                 return false;
2264
2265         bool need_anchor_change = false;
2266         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
2267                 need_anchor_change);
2268
2269         if (need_anchor_change)
2270                 cur.resetAnchor();
2271
2272         if (!changed)
2273                 return false;
2274
2275         d->cursor_ = cur;
2276
2277         buffer_.updateLabels();
2278
2279         updateMetrics();
2280         buffer_.changed();
2281         return true;
2282 }
2283
2284
2285 bool BufferView::mouseSetCursor(Cursor & cur, bool select)
2286 {
2287         LASSERT(&cur.bv() == this, /**/);
2288
2289         if (!select)
2290                 // this event will clear selection so we save selection for
2291                 // persistent selection
2292                 cap::saveSelection(cursor());
2293
2294         d->cursor_.macroModeClose();
2295
2296         // Has the cursor just left the inset?
2297         bool leftinset = (&d->cursor_.inset() != &cur.inset());
2298         if (leftinset)
2299                 d->cursor_.fixIfBroken();
2300
2301         // FIXME: shift-mouse selection doesn't work well across insets.
2302         bool do_selection = select && &d->cursor_.anchor().inset() == &cur.inset();
2303
2304         // do the dEPM magic if needed
2305         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
2306         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
2307         // the leftinset bool would not be necessary (badcursor instead).
2308         bool update = leftinset;
2309         if (!do_selection && d->cursor_.inTexted())
2310                 update |= checkDepm(cur, d->cursor_);
2311
2312         if (!do_selection)
2313                 d->cursor_.resetAnchor();
2314         d->cursor_.setCursor(cur);
2315         d->cursor_.boundary(cur.boundary());
2316         if (do_selection)
2317                 d->cursor_.setSelection();
2318         else
2319                 d->cursor_.clearSelection();
2320
2321         d->cursor_.finishUndo();
2322         d->cursor_.setCurrentFont();
2323         return update;
2324 }
2325
2326
2327 void BufferView::putSelectionAt(DocIterator const & cur,
2328                                 int length, bool backwards)
2329 {
2330         d->cursor_.clearSelection();
2331
2332         setCursor(cur);
2333
2334         if (length) {
2335                 if (backwards) {
2336                         d->cursor_.pos() += length;
2337                         d->cursor_.setSelection(d->cursor_, -length);
2338                 } else
2339                         d->cursor_.setSelection(d->cursor_, length);
2340         }
2341         // Ensure a redraw happens in any case because the new selection could
2342         // possibly be on the same screen as the previous selection.
2343         processUpdateFlags(Update::Force | Update::FitCursor);
2344 }
2345
2346
2347 Cursor & BufferView::cursor()
2348 {
2349         return d->cursor_;
2350 }
2351
2352
2353 Cursor const & BufferView::cursor() const
2354 {
2355         return d->cursor_;
2356 }
2357
2358
2359 pit_type BufferView::anchor_ref() const
2360 {
2361         return d->anchor_pit_;
2362 }
2363
2364
2365 bool BufferView::singleParUpdate()
2366 {
2367         Text & buftext = buffer_.text();
2368         pit_type const bottom_pit = d->cursor_.bottom().pit();
2369         TextMetrics & tm = textMetrics(&buftext);
2370         int old_height = tm.parMetrics(bottom_pit).height();
2371
2372         // make sure inline completion pointer is ok
2373         if (d->inlineCompletionPos_.fixIfBroken())
2374                 d->inlineCompletionPos_ = DocIterator();
2375
2376         // In Single Paragraph mode, rebreak only
2377         // the (main text, not inset!) paragraph containing the cursor.
2378         // (if this paragraph contains insets etc., rebreaking will
2379         // recursively descend)
2380         tm.redoParagraph(bottom_pit);
2381         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
2382         if (pm.height() != old_height)
2383                 // Paragraph height has changed so we cannot proceed to
2384                 // the singlePar optimisation.
2385                 return false;
2386
2387         d->update_strategy_ = SingleParUpdate;
2388
2389         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
2390                 << " y2: " << pm.position() + pm.descent()
2391                 << " pit: " << bottom_pit
2392                 << " singlepar: 1");
2393         return true;
2394 }
2395
2396
2397 void BufferView::updateMetrics()
2398 {
2399         if (height_ == 0 || width_ == 0)
2400                 return;
2401
2402         Text & buftext = buffer_.text();
2403         pit_type const npit = int(buftext.paragraphs().size());
2404
2405         // Clear out the position cache in case of full screen redraw,
2406         d->coord_cache_.clear();
2407
2408         // Clear out paragraph metrics to avoid having invalid metrics
2409         // in the cache from paragraphs not relayouted below
2410         // The complete text metrics will be redone.
2411         d->text_metrics_.clear();
2412
2413         TextMetrics & tm = textMetrics(&buftext);
2414
2415         // make sure inline completion pointer is ok
2416         if (d->inlineCompletionPos_.fixIfBroken())
2417                 d->inlineCompletionPos_ = DocIterator();
2418
2419         if (d->anchor_pit_ >= npit)
2420                 // The anchor pit must have been deleted...
2421                 d->anchor_pit_ = npit - 1;
2422
2423         // Rebreak anchor paragraph.
2424         tm.redoParagraph(d->anchor_pit_);
2425         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
2426
2427         // position anchor
2428         if (d->anchor_pit_ == 0) {
2429                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
2430
2431                 // Complete buffer visible? Then it's easy.
2432                 if (scrollRange == 0)
2433                         d->anchor_ypos_ = anchor_pm.ascent();
2434
2435                 // FIXME: Some clever handling needed to show
2436                 // the _first_ paragraph up to the top if the cursor is
2437                 // in the first line.
2438         }
2439         anchor_pm.setPosition(d->anchor_ypos_);
2440
2441         LYXERR(Debug::PAINTING, "metrics: "
2442                 << " anchor pit = " << d->anchor_pit_
2443                 << " anchor ypos = " << d->anchor_ypos_);
2444
2445         // Redo paragraphs above anchor if necessary.
2446         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
2447         // We are now just above the anchor paragraph.
2448         pit_type pit1 = d->anchor_pit_ - 1;
2449         for (; pit1 >= 0 && y1 >= 0; --pit1) {
2450                 tm.redoParagraph(pit1);
2451                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
2452                 y1 -= pm.descent();
2453                 // Save the paragraph position in the cache.
2454                 pm.setPosition(y1);
2455                 y1 -= pm.ascent();
2456         }
2457
2458         // Redo paragraphs below the anchor if necessary.
2459         int y2 = d->anchor_ypos_ + anchor_pm.descent();
2460         // We are now just below the anchor paragraph.
2461         pit_type pit2 = d->anchor_pit_ + 1;
2462         for (; pit2 < npit && y2 <= height_; ++pit2) {
2463                 tm.redoParagraph(pit2);
2464                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
2465                 y2 += pm.ascent();
2466                 // Save the paragraph position in the cache.
2467                 pm.setPosition(y2);
2468                 y2 += pm.descent();
2469         }
2470
2471         LYXERR(Debug::PAINTING, "Metrics: "
2472                 << " anchor pit = " << d->anchor_pit_
2473                 << " anchor ypos = " << d->anchor_ypos_
2474                 << " y1 = " << y1
2475                 << " y2 = " << y2
2476                 << " pit1 = " << pit1
2477                 << " pit2 = " << pit2);
2478
2479         d->update_strategy_ = FullScreenUpdate;
2480
2481         if (lyxerr.debugging(Debug::WORKAREA)) {
2482                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
2483                 d->coord_cache_.dump();
2484         }
2485 }
2486
2487
2488 void BufferView::insertLyXFile(FileName const & fname)
2489 {
2490         LASSERT(d->cursor_.inTexted(), /**/);
2491
2492         // Get absolute path of file and add ".lyx"
2493         // to the filename if necessary
2494         FileName filename = fileSearch(string(), fname.absFilename(), "lyx");
2495
2496         docstring const disp_fn = makeDisplayPath(filename.absFilename());
2497         // emit message signal.
2498         message(bformat(_("Inserting document %1$s..."), disp_fn));
2499
2500         docstring res;
2501         Buffer buf("", false);
2502         if (buf.loadLyXFile(filename)) {
2503                 ErrorList & el = buffer_.errorList("Parse");
2504                 // Copy the inserted document error list into the current buffer one.
2505                 el = buf.errorList("Parse");
2506                 buffer_.undo().recordUndo(d->cursor_);
2507                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
2508                                              buf.params().documentClassPtr(), el);
2509                 res = _("Document %1$s inserted.");
2510         } else {
2511                 res = _("Could not insert document %1$s");
2512         }
2513
2514         updateMetrics();
2515         buffer_.changed();
2516         // emit message signal.
2517         message(bformat(res, disp_fn));
2518         buffer_.errors("Parse");
2519 }
2520
2521
2522 Point BufferView::coordOffset(DocIterator const & dit, bool boundary) const
2523 {
2524         int x = 0;
2525         int y = 0;
2526         int lastw = 0;
2527
2528         // Addup contribution of nested insets, from inside to outside,
2529         // keeping the outer paragraph for a special handling below
2530         for (size_t i = dit.depth() - 1; i >= 1; --i) {
2531                 CursorSlice const & sl = dit[i];
2532                 int xx = 0;
2533                 int yy = 0;
2534
2535                 // get relative position inside sl.inset()
2536                 sl.inset().cursorPos(*this, sl, boundary && (i + 1 == dit.depth()), xx, yy);
2537
2538                 // Make relative position inside of the edited inset relative to sl.inset()
2539                 x += xx;
2540                 y += yy;
2541
2542                 // In case of an RTL inset, the edited inset will be positioned to the left
2543                 // of xx:yy
2544                 if (sl.text()) {
2545                         bool boundary_i = boundary && i + 1 == dit.depth();
2546                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
2547                         if (rtl)
2548                                 x -= lastw;
2549                 }
2550
2551                 // remember width for the case that sl.inset() is positioned in an RTL inset
2552                 if (i && dit[i - 1].text()) {
2553                         // If this Inset is inside a Text Inset, retrieve the Dimension
2554                         // from the containing text instead of using Inset::dimension() which
2555                         // might not be implemented.
2556                         // FIXME (Abdel 23/09/2007): this is a bit messy because of the
2557                         // elimination of Inset::dim_ cache. This coordOffset() method needs
2558                         // to be rewritten in light of the new design.
2559                         Dimension const & dim = parMetrics(dit[i - 1].text(),
2560                                 dit[i - 1].pit()).insetDimension(&sl.inset());
2561                         lastw = dim.wid;
2562                 } else {
2563                         Dimension const dim = sl.inset().dimension(*this);
2564                         lastw = dim.wid;
2565                 }
2566
2567                 //lyxerr << "Cursor::getPos, i: "
2568                 // << i << " x: " << xx << " y: " << y << endl;
2569         }
2570
2571         // Add contribution of initial rows of outermost paragraph
2572         CursorSlice const & sl = dit[0];
2573         TextMetrics const & tm = textMetrics(sl.text());
2574         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
2575         LASSERT(!pm.rows().empty(), /**/);
2576         y -= pm.rows()[0].ascent();
2577 #if 1
2578         // FIXME: document this mess
2579         size_t rend;
2580         if (sl.pos() > 0 && dit.depth() == 1) {
2581                 int pos = sl.pos();
2582                 if (pos && boundary)
2583                         --pos;
2584 //              lyxerr << "coordOffset: boundary:" << boundary << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
2585                 rend = pm.pos2row(pos);
2586         } else
2587                 rend = pm.pos2row(sl.pos());
2588 #else
2589         size_t rend = pm.pos2row(sl.pos());
2590 #endif
2591         for (size_t rit = 0; rit != rend; ++rit)
2592                 y += pm.rows()[rit].height();
2593         y += pm.rows()[rend].ascent();
2594
2595         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2596
2597         // Make relative position from the nested inset now bufferview absolute.
2598         int xx = bottom_tm.cursorX(dit.bottom(), boundary && dit.depth() == 1);
2599         x += xx;
2600
2601         // In the RTL case place the nested inset at the left of the cursor in
2602         // the outer paragraph
2603         bool boundary_1 = boundary && 1 == dit.depth();
2604         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2605         if (rtl)
2606                 x -= lastw;
2607
2608         return Point(x, y);
2609 }
2610
2611
2612 Point BufferView::getPos(DocIterator const & dit, bool boundary) const
2613 {
2614         if (!paragraphVisible(dit))
2615                 return Point(-1, -1);
2616
2617         CursorSlice const & bot = dit.bottom();
2618         TextMetrics const & tm = textMetrics(bot.text());
2619
2620         Point p = coordOffset(dit, boundary); // offset from outer paragraph
2621         p.y_ += tm.parMetrics(bot.pit()).position();
2622         return p;
2623 }
2624
2625
2626 bool BufferView::paragraphVisible(DocIterator const & dit) const
2627 {
2628         CursorSlice const & bot = dit.bottom();
2629         TextMetrics const & tm = textMetrics(bot.text());
2630
2631         return tm.contains(bot.pit());
2632 }
2633
2634
2635 void BufferView::cursorPosAndHeight(Point & p, int & h) const
2636 {
2637         Cursor const & cur = cursor();
2638         Font const font = cur.getFont();
2639         frontend::FontMetrics const & fm = theFontMetrics(font);
2640         int const asc = fm.maxAscent();
2641         int const des = fm.maxDescent();
2642         h = asc + des;
2643         p = getPos(cur, cur.boundary());
2644         p.y_ -= asc;
2645 }
2646
2647
2648 bool BufferView::cursorInView(Point const & p, int h) const
2649 {
2650         Cursor const & cur = cursor();
2651         // does the cursor touch the screen ?
2652         if (p.y_ + h < 0 || p.y_ >= workHeight() || !paragraphVisible(cur))
2653                 return false;
2654         return true;
2655 }
2656
2657
2658 void BufferView::draw(frontend::Painter & pain)
2659 {
2660         if (height_ == 0 || width_ == 0)
2661                 return;
2662         LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
2663
2664         Text & text = buffer_.text();
2665         TextMetrics const & tm = d->text_metrics_[&text];
2666         int const y = tm.first().second->position();
2667         PainterInfo pi(this, pain);
2668
2669         switch (d->update_strategy_) {
2670
2671         case NoScreenUpdate:
2672                 // If no screen painting is actually needed, only some the different
2673                 // coordinates of insets and paragraphs needs to be updated.
2674                 pi.full_repaint = true;
2675                 pi.pain.setDrawingEnabled(false);
2676                 tm.draw(pi, 0, y);
2677                 break;
2678
2679         case SingleParUpdate:
2680                 pi.full_repaint = false;
2681                 // In general, only the current row of the outermost paragraph
2682                 // will be redrawn. Particular cases where selection spans
2683                 // multiple paragraph are correctly detected in TextMetrics.
2684                 tm.draw(pi, 0, y);
2685                 break;
2686
2687         case DecorationUpdate:
2688                 // FIXME: We should also distinguish DecorationUpdate to avoid text
2689                 // drawing if possible. This is not possible to do easily right now
2690                 // because of the single backing pixmap.
2691
2692         case FullScreenUpdate:
2693                 // The whole screen, including insets, will be refreshed.
2694                 pi.full_repaint = true;
2695
2696                 // Clear background.
2697                 pain.fillRectangle(0, 0, width_, height_,
2698                         pi.backgroundColor(&buffer_.inset()));
2699
2700                 // Draw everything.
2701                 tm.draw(pi, 0, y);
2702
2703                 // and possibly grey out below
2704                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2705                 int const y2 = lastpm.second->position() + lastpm.second->descent();
2706
2707                 if (y2 < height_) {
2708                         Color color = buffer().isInternal()
2709                                 ? Color_background : Color_bottomarea;
2710                         pain.fillRectangle(0, y2, width_, height_ - y2, color);
2711                 }
2712                 break;
2713         }
2714         LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
2715
2716         // The scrollbar needs an update.
2717         updateScrollbar();
2718
2719         // Normalize anchor for next time
2720         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
2721         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2722         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
2723                 ParagraphMetrics const & pm = tm.parMetrics(pit);
2724                 if (pm.position() + pm.descent() > 0) {
2725                         d->anchor_pit_ = pit;
2726                         d->anchor_ypos_ = pm.position();
2727                         break;
2728                 }
2729         }
2730         LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
2731                 << "  anchor ypos = " << d->anchor_ypos_);
2732 }
2733
2734
2735 void BufferView::message(docstring const & msg)
2736 {
2737         if (d->gui_)
2738                 d->gui_->message(msg);
2739 }
2740
2741
2742 void BufferView::showDialog(string const & name)
2743 {
2744         if (d->gui_)
2745                 d->gui_->showDialog(name, string());
2746 }
2747
2748
2749 void BufferView::showDialog(string const & name,
2750         string const & data, Inset * inset)
2751 {
2752         if (d->gui_)
2753                 d->gui_->showDialog(name, data, inset);
2754 }
2755
2756
2757 void BufferView::updateDialog(string const & name, string const & data)
2758 {
2759         if (d->gui_)
2760                 d->gui_->updateDialog(name, data);
2761 }
2762
2763
2764 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
2765 {
2766         d->gui_ = gui;
2767 }
2768
2769
2770 // FIXME: Move this out of BufferView again
2771 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
2772 {
2773         if (!fname.isReadableFile()) {
2774                 docstring const error = from_ascii(strerror(errno));
2775                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2776                 docstring const text =
2777                   bformat(_("Could not read the specified document\n"
2778                             "%1$s\ndue to the error: %2$s"), file, error);
2779                 Alert::error(_("Could not read file"), text);
2780                 return docstring();
2781         }
2782
2783         if (!fname.isReadableFile()) {
2784                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2785                 docstring const text =
2786                   bformat(_("%1$s\n is not readable."), file);
2787                 Alert::error(_("Could not open file"), text);
2788                 return docstring();
2789         }
2790
2791         // FIXME UNICODE: We don't know the encoding of the file
2792         docstring file_content = fname.fileContents("UTF-8");
2793         if (file_content.empty()) {
2794                 Alert::error(_("Reading not UTF-8 encoded file"),
2795                              _("The file is not UTF-8 encoded.\n"
2796                                "It will be read as local 8Bit-encoded.\n"
2797                                "If this does not give the correct result\n"
2798                                "then please change the encoding of the file\n"
2799                                "to UTF-8 with a program other than LyX.\n"));
2800                 file_content = fname.fileContents("local8bit");
2801         }
2802
2803         return normalize_c(file_content);
2804 }
2805
2806
2807 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
2808 {
2809         docstring const tmpstr = contentsOfPlaintextFile(f);
2810
2811         if (tmpstr.empty())
2812                 return;
2813
2814         Cursor & cur = cursor();
2815         cap::replaceSelection(cur);
2816         buffer_.undo().recordUndo(cur);
2817         if (asParagraph)
2818                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr, cur.current_font);
2819         else
2820                 cur.innerText()->insertStringAsLines(cur, tmpstr, cur.current_font);
2821
2822         updateMetrics();
2823         buffer_.changed();
2824 }
2825
2826
2827 docstring const & BufferView::inlineCompletion() const
2828 {
2829         return d->inlineCompletion_;
2830 }
2831
2832
2833 size_t const & BufferView::inlineCompletionUniqueChars() const
2834 {
2835         return d->inlineCompletionUniqueChars_;
2836 }
2837
2838
2839 DocIterator const & BufferView::inlineCompletionPos() const
2840 {
2841         return d->inlineCompletionPos_;
2842 }
2843
2844
2845 bool samePar(DocIterator const & a, DocIterator const & b)
2846 {
2847         if (a.empty() && b.empty())
2848                 return true;
2849         if (a.empty() || b.empty())
2850                 return false;
2851         if (a.depth() != b.depth())
2852                 return false;
2853         return &a.innerParagraph() == &b.innerParagraph();
2854 }
2855
2856
2857 void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
2858         docstring const & completion, size_t uniqueChars)
2859 {
2860         uniqueChars = min(completion.size(), uniqueChars);
2861         bool changed = d->inlineCompletion_ != completion
2862                 || d->inlineCompletionUniqueChars_ != uniqueChars;
2863         bool singlePar = true;
2864         d->inlineCompletion_ = completion;
2865         d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
2866
2867         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
2868
2869         // at new position?
2870         DocIterator const & old = d->inlineCompletionPos_;
2871         if (old != pos) {
2872                 //lyxerr << "inlineCompletionPos changed" << std::endl;
2873                 // old or pos are in another paragraph?
2874                 if ((!samePar(cur, pos) && !pos.empty())
2875                     || (!samePar(cur, old) && !old.empty())) {
2876                         singlePar = false;
2877                         //lyxerr << "different paragraph" << std::endl;
2878                 }
2879                 d->inlineCompletionPos_ = pos;
2880         }
2881
2882         // set update flags
2883         if (changed) {
2884                 if (singlePar && !(cur.disp_.update() & Update::Force))
2885                         cur.updateFlags(cur.disp_.update() | Update::SinglePar);
2886                 else
2887                         cur.updateFlags(cur.disp_.update() | Update::Force);
2888         }
2889 }
2890
2891 } // namespace lyx