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 "Layout.h"
  43 #include "LyXRC.h"
  44 #include "MetricsInfo.h"
  45 #include "Paragraph.h"
  46 #include "ParagraphParameters.h"
  47 #include "ParIterator.h"
  48 #include "Session.h"
  49 #include "Text.h"
  50 #include "TextClass.h"
  51 #include "TextMetrics.h"
  52 #include "TexRow.h"
  53 #include "TocBackend.h"
  54 #include "VSpace.h"
  55 #include "WordLangTuple.h"
  56
  57 #include "insets/InsetBibtex.h"
  58 #include "insets/InsetCommand.h" // ChangeRefs
  59 #include "insets/InsetExternal.h"
  60 #include "insets/InsetGraphics.h"
  61 #include "insets/InsetRef.h"
  62 #include "insets/InsetText.h"
  63 #include "insets/InsetNote.h"
  64
  65 #include "frontends/alert.h"
  66 #include "frontends/Application.h"
  67 #include "frontends/Delegates.h"
  68 #include "frontends/FontMetrics.h"
  69 #include "frontends/Painter.h"
  70 #include "frontends/Selection.h"
  71
  72 #include "graphics/Previews.h"
  73
  74 #include "support/convert.h"
  75 #include "support/debug.h"
  76 #include "support/ExceptionMessage.h"
  77 #include "support/filetools.h"
  78 #include "support/gettext.h"
  79 #include "support/lstrings.h"
  80 #include "support/Package.h"
  81 #include "support/types.h"
  82
  83 #include <cerrno>
  84 #include <fstream>
  85 #include <functional>
  86 #include <iterator>
  87 #include <sstream>
  88 #include <vector>
  89
  90 using namespace std;
  91 using namespace lyx::support;
  92
  93 namespace lyx {
  94
  95 namespace Alert = frontend::Alert;
  96
  97 namespace {
  98
  99 /// Return an inset of this class if it exists at the current cursor position
 100 template <class T>
 101 T * getInsetByCode(Cursor const & cur, InsetCode code)
 102 {
 103         DocIterator it = cur;
 104         Inset * inset = it.nextInset();
 105         if (inset && inset->lyxCode() == code)
 106                 return static_cast<T*>(inset);
 107         return 0;
 108 }
 109
 110
 111 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 112         bool same_content);
 113
 114 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 115         docstring const & contents)
 116 {
 117         DocIterator tmpdit = dit;
 118
 119         while (tmpdit) {
 120                 Inset const * inset = tmpdit.nextInset();
 121                 if (inset
 122                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()
 123                     && (contents.empty() ||
 124                     static_cast<InsetCommand const *>(inset)->getFirstNonOptParam() == contents)) {
 125                         dit = tmpdit;
 126                         return true;
 127                 }
 128                 tmpdit.forwardInset();
 129         }
 130
 131         return false;
 132 }
 133
 134
 135 /// Looks for next inset with one of the given codes.
 136 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 137         bool same_content)
 138 {
 139         docstring contents;
 140         DocIterator tmpdit = dit;
 141         tmpdit.forwardInset();
 142         if (!tmpdit)
 143                 return false;
 144
 145         if (same_content) {
 146                 Inset const * inset = tmpdit.nextInset();
 147                 if (inset
 148                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()) {
 149                         contents = static_cast<InsetCommand const *>(inset)->getFirstNonOptParam();
 150                 }
 151         }
 152
 153         if (!findNextInset(tmpdit, codes, contents)) {
 154                 if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
 155                         Inset * inset = &tmpdit.bottom().inset();
 156                         tmpdit = doc_iterator_begin(&inset->buffer(), inset);
 157                         if (!findNextInset(tmpdit, codes, contents))
 158                                 return false;
 159                 } else {
 160                         return false;
 161                 }
 162         }
 163
 164         dit = tmpdit;
 165         return true;
 166 }
 167
 168
 169 /// Looks for next inset with the given code
 170 void findInset(DocIterator & dit, InsetCode code, bool same_content)
 171 {
 172         findInset(dit, vector<InsetCode>(1, code), same_content);
 173 }
 174
 175
 176 /// Moves cursor to the next inset with one of the given codes.
 177 void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
 178                bool same_content)
 179 {
 180         Cursor tmpcur = bv->cursor();
 181         if (!findInset(tmpcur, codes, same_content)) {
 182                 bv->cursor().message(_("No more insets"));
 183                 return;
 184         }
 185
 186         tmpcur.clearSelection();
 187         bv->setCursor(tmpcur);
 188         bv->showCursor();
 189 }
 190
 191
 192 /// Moves cursor to the next inset with given code.
 193 void gotoInset(BufferView * bv, InsetCode code, bool same_content)
 194 {
 195         gotoInset(bv, vector<InsetCode>(1, code), same_content);
 196 }
 197
 198
 199 /// A map from a Text to the associated text metrics
 200 typedef map<Text const *, TextMetrics> TextMetricsCache;
 201
 202 enum ScreenUpdateStrategy {
 203         NoScreenUpdate,
 204         SingleParUpdate,
 205         FullScreenUpdate,
 206         DecorationUpdate
 207 };
 208
 209 } // anon namespace
 210
 211
 212 /////////////////////////////////////////////////////////////////////
 213 //
 214 // BufferView
 215 //
 216 /////////////////////////////////////////////////////////////////////
 217
 218 struct BufferView::Private
 219 {
 220         Private(BufferView & bv): wh_(0), cursor_(bv),
 221                 anchor_pit_(0), anchor_ypos_(0),
 222                 inlineCompletionUniqueChars_(0),
 223                 last_inset_(0), mouse_position_cache_(),
 224                 bookmark_edit_position_(-1), 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         /// position of the mouse at the time of the last mouse move
 268         /// This is used to update the hovering status of inset in
 269         /// cases where the buffer is scrolled, but the mouse didn't move.
 270         Point mouse_position_cache_;
 271
 272         // cache for id of the paragraph which was edited the last time
 273         int bookmark_edit_position_;
 274
 275         mutable TextMetricsCache text_metrics_;
 276
 277         /// Whom to notify.
 278         /** Not owned, so don't delete.
 279           */
 280         frontend::GuiBufferViewDelegate * gui_;
 281
 282         /// Cache for Find Next
 283         FuncRequest search_request_cache_;
 284
 285         ///
 286         map<string, Inset *> edited_insets_;
 287 };
 288
 289
 290 BufferView::BufferView(Buffer & buf)
 291         : width_(0), height_(0), full_screen_(false), buffer_(buf),
 292       d(new Private(*this))
 293 {
 294         d->xsel_cache_.set = false;
 295         d->intl_.initKeyMapper(lyxrc.use_kbmap);
 296
 297         d->cursor_.setBuffer(&buf);
 298         d->cursor_.push(buffer_.inset());
 299         d->cursor_.resetAnchor();
 300         d->cursor_.setCurrentFont();
 301
 302         if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 303                 thePreviews().generateBufferPreviews(buffer_);
 304 }
 305
 306
 307 BufferView::~BufferView()
 308 {
 309         // current buffer is going to be switched-off, save cursor pos
 310         // Ideally, the whole cursor stack should be saved, but session
 311         // currently can only handle bottom (whole document) level pit and pos.
 312         // That is to say, if a cursor is in a nested inset, it will be
 313         // restore to the left of the top level inset.
 314         LastFilePosSection::FilePos fp;
 315         fp.pit = d->cursor_.bottom().pit();
 316         fp.pos = d->cursor_.bottom().pos();
 317         theSession().lastFilePos().save(buffer_.fileName(), fp);
 318
 319         if (d->last_inset_)
 320                 d->last_inset_->setMouseHover(this, false);
 321
 322         delete d;
 323 }
 324
 325
 326 int BufferView::rightMargin() const
 327 {
 328         // The additional test for the case the outliner is opened.
 329         if (!full_screen_ ||
 330                 !lyxrc.full_screen_limit ||
 331                 width_ < lyxrc.full_screen_width + 20)
 332                         return 10;
 333
 334         return (width_ - lyxrc.full_screen_width) / 2;
 335 }
 336
 337
 338 int BufferView::leftMargin() const
 339 {
 340         return rightMargin();
 341 }
 342
 343
 344 bool BufferView::isTopScreen() const
 345 {
 346         return d->scrollbarParameters_.position == d->scrollbarParameters_.min;
 347 }
 348
 349
 350 bool BufferView::isBottomScreen() const
 351 {
 352         return d->scrollbarParameters_.position == d->scrollbarParameters_.max;
 353 }
 354
 355
 356 Intl & BufferView::getIntl()
 357 {
 358         return d->intl_;
 359 }
 360
 361
 362 Intl const & BufferView::getIntl() const
 363 {
 364         return d->intl_;
 365 }
 366
 367
 368 CoordCache & BufferView::coordCache()
 369 {
 370         return d->coord_cache_;
 371 }
 372
 373
 374 CoordCache const & BufferView::coordCache() const
 375 {
 376         return d->coord_cache_;
 377 }
 378
 379
 380 Buffer & BufferView::buffer()
 381 {
 382         return buffer_;
 383 }
 384
 385
 386 Buffer const & BufferView::buffer() const
 387 {
 388         return buffer_;
 389 }
 390
 391
 392 bool BufferView::fitCursor()
 393 {
 394         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
 395                 frontend::FontMetrics const & fm =
 396                         theFontMetrics(d->cursor_.getFont().fontInfo());
 397                 int const asc = fm.maxAscent();
 398                 int const des = fm.maxDescent();
 399                 Point const p = getPos(d->cursor_);
 400                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 401                         return false;
 402         }
 403         return true;
 404 }
 405
 406
 407 void BufferView::processUpdateFlags(Update::flags flags)
 408 {
 409         // This is close to a hot-path.
 410         LYXERR(Debug::DEBUG, "BufferView::processUpdateFlags()"
 411                 << "[fitcursor = " << (flags & Update::FitCursor)
 412                 << ", forceupdate = " << (flags & Update::Force)
 413                 << ", singlepar = " << (flags & Update::SinglePar)
 414                 << "]  buffer: " << &buffer_);
 415
 416         // FIXME Does this really need doing here? It's done in updateBuffer, and
 417         // if the Buffer doesn't need updating, then do the macros?
 418         buffer_.updateMacros();
 419
 420         // Now do the first drawing step if needed. This consists on updating
 421         // the CoordCache in updateMetrics().
 422         // The second drawing step is done in WorkArea::redraw() if needed.
 423
 424         // Case when no explicit update is requested.
 425         if (!flags) {
 426                 // no need to redraw anything.
 427                 d->update_strategy_ = NoScreenUpdate;
 428                 return;
 429         }
 430
 431         if (flags == Update::Decoration) {
 432                 d->update_strategy_ = DecorationUpdate;
 433                 buffer_.changed(false);
 434                 return;
 435         }
 436
 437         if (flags == Update::FitCursor
 438                 || flags == (Update::Decoration | Update::FitCursor)) {
 439                 // tell the frontend to update the screen if needed.
 440                 if (fitCursor()) {
 441                         showCursor();
 442                         return;
 443                 }
 444                 if (flags & Update::Decoration) {
 445                         d->update_strategy_ = DecorationUpdate;
 446                         buffer_.changed(false);
 447                         return;
 448                 }
 449                 // no screen update is needed.
 450                 d->update_strategy_ = NoScreenUpdate;
 451                 return;
 452         }
 453
 454         bool const full_metrics = flags & Update::Force || !singleParUpdate();
 455
 456         if (full_metrics)
 457                 // We have to update the full screen metrics.
 458                 updateMetrics();
 459
 460         if (!(flags & Update::FitCursor)) {
 461                 // Nothing to do anymore. Trigger a redraw and return
 462                 buffer_.changed(false);
 463                 return;
 464         }
 465
 466         // updateMetrics() does not update paragraph position
 467         // This is done at draw() time. So we need a redraw!
 468         buffer_.changed(false);
 469
 470         if (fitCursor()) {
 471                 // The cursor is off screen so ensure it is visible.
 472                 // refresh it:
 473                 showCursor();
 474         }
 475
 476         updateHoveredInset();
 477 }
 478
 479
 480 void BufferView::updateScrollbar()
 481 {
 482         if (height_ == 0 && width_ == 0)
 483                 return;
 484
 485         // We prefer fixed size line scrolling.
 486         d->scrollbarParameters_.single_step = defaultRowHeight();
 487         // We prefer full screen page scrolling.
 488         d->scrollbarParameters_.page_step = height_;
 489
 490         Text & t = buffer_.text();
 491         TextMetrics & tm = d->text_metrics_[&t];
 492
 493         LYXERR(Debug::GUI, " Updating scrollbar: height: "
 494                 << t.paragraphs().size()
 495                 << " curr par: " << d->cursor_.bottom().pit()
 496                 << " default height " << defaultRowHeight());
 497
 498         size_t const parsize = t.paragraphs().size();
 499         if (d->par_height_.size() != parsize) {
 500                 d->par_height_.clear();
 501                 // FIXME: We assume a default paragraph height of 2 rows. This
 502                 // should probably be pondered with the screen width.
 503                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
 504         }
 505
 506         // Look at paragraph heights on-screen
 507         pair<pit_type, ParagraphMetrics const *> first = tm.first();
 508         pair<pit_type, ParagraphMetrics const *> last = tm.last();
 509         for (pit_type pit = first.first; pit <= last.first; ++pit) {
 510                 d->par_height_[pit] = tm.parMetrics(pit).height();
 511                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
 512                         << d->par_height_[pit]);
 513         }
 514
 515         int top_pos = first.second->position() - first.second->ascent();
 516         int bottom_pos = last.second->position() + last.second->descent();
 517         bool first_visible = first.first == 0 && top_pos >= 0;
 518         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
 519         if (first_visible && last_visible) {
 520                 d->scrollbarParameters_.min = 0;
 521                 d->scrollbarParameters_.max = 0;
 522                 return;
 523         }
 524
 525         d->scrollbarParameters_.min = top_pos;
 526         for (size_t i = 0; i != size_t(first.first); ++i)
 527                 d->scrollbarParameters_.min -= d->par_height_[i];
 528         d->scrollbarParameters_.max = bottom_pos;
 529         for (size_t i = last.first + 1; i != parsize; ++i)
 530                 d->scrollbarParameters_.max += d->par_height_[i];
 531
 532         d->scrollbarParameters_.position = 0;
 533         // The reference is the top position so we remove one page.
 534         if (lyxrc.scroll_below_document)
 535                 d->scrollbarParameters_.max -= minVisiblePart();
 536         else
 537                 d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 538 }
 539
 540
 541 ScrollbarParameters const & BufferView::scrollbarParameters() const
 542 {
 543         return d->scrollbarParameters_;
 544 }
 545
 546
 547 docstring BufferView::toolTip(int x, int y) const
 548 {
 549         // Get inset under mouse, if there is one.
 550         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 551         if (!covering_inset)
 552                 // No inset, no tooltip...
 553                 return docstring();
 554         return covering_inset->toolTip(*this, x, y);
 555 }
 556
 557
 558 docstring BufferView::contextMenu(int x, int y) const
 559 {
 560         //If there is a selection, return the containing inset menu
 561         if (d->cursor_.selection())
 562                 return d->cursor_.inset().contextMenu(*this, x, y);
 563
 564         // Get inset under mouse, if there is one.
 565         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 566         if (covering_inset)
 567                 return covering_inset->contextMenu(*this, x, y);
 568
 569         return buffer_.inset().contextMenu(*this, x, y);
 570 }
 571
 572
 573 void BufferView::scrollDocView(int value, bool update)
 574 {
 575         int const offset = value - d->scrollbarParameters_.position;
 576
 577         // No scrolling at all? No need to redraw anything
 578         if (offset == 0)
 579                 return;
 580
 581         // If the offset is less than 2 screen height, prefer to scroll instead.
 582         if (abs(offset) <= 2 * height_) {
 583                 d->anchor_ypos_ -= offset;
 584                 buffer_.changed(true);
 585                 updateHoveredInset();
 586                 return;
 587         }
 588
 589         // cut off at the top
 590         if (value <= d->scrollbarParameters_.min) {
 591                 DocIterator dit = doc_iterator_begin(&buffer_);
 592                 showCursor(dit, false, update);
 593                 LYXERR(Debug::SCROLLING, "scroll to top");
 594                 return;
 595         }
 596
 597         // cut off at the bottom
 598         if (value >= d->scrollbarParameters_.max) {
 599                 DocIterator dit = doc_iterator_end(&buffer_);
 600                 dit.backwardPos();
 601                 showCursor(dit, false, update);
 602                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 603                 return;
 604         }
 605
 606         // find paragraph at target position
 607         int par_pos = d->scrollbarParameters_.min;
 608         pit_type i = 0;
 609         for (; i != int(d->par_height_.size()); ++i) {
 610                 par_pos += d->par_height_[i];
 611                 if (par_pos >= value)
 612                         break;
 613         }
 614
 615         if (par_pos < value) {
 616                 // It seems we didn't find the correct pit so stay on the safe side and
 617                 // scroll to bottom.
 618                 LYXERR0("scrolling position not found!");
 619                 scrollDocView(d->scrollbarParameters_.max, update);
 620                 return;
 621         }
 622
 623         DocIterator dit = doc_iterator_begin(&buffer_);
 624         dit.pit() = i;
 625         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 626         showCursor(dit, false, update);
 627 }
 628
 629
 630 // FIXME: this method is not working well.
 631 void BufferView::setCursorFromScrollbar()
 632 {
 633         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 634
 635         int const height = 2 * defaultRowHeight();
 636         int const first = height;
 637         int const last = height_ - height;
 638         int newy = 0;
 639         Cursor const & oldcur = d->cursor_;
 640
 641         switch (cursorStatus(oldcur)) {
 642         case CUR_ABOVE:
 643                 newy = first;
 644                 break;
 645         case CUR_BELOW:
 646                 newy = last;
 647                 break;
 648         case CUR_INSIDE:
 649                 int const y = getPos(oldcur).y_;
 650                 newy = min(last, max(y, first));
 651                 if (y == newy)
 652                         return;
 653         }
 654         // We reset the cursor because cursorStatus() does not
 655         // work when the cursor is within mathed.
 656         Cursor cur(*this);
 657         cur.reset();
 658         tm.setCursorFromCoordinates(cur, 0, newy);
 659
 660         // update the bufferview cursor and notify insets
 661         // FIXME: Care about the d->cursor_ flags to redraw if needed
 662         Cursor old = d->cursor_;
 663         mouseSetCursor(cur);
 664         bool badcursor = notifyCursorLeavesOrEnters(old, d->cursor_);
 665         if (badcursor)
 666                 d->cursor_.fixIfBroken();
 667 }
 668
 669
 670 Change const BufferView::getCurrentChange() const
 671 {
 672         if (!d->cursor_.selection())
 673                 return Change(Change::UNCHANGED);
 674
 675         DocIterator dit = d->cursor_.selectionBegin();
 676         return dit.paragraph().lookupChange(dit.pos());
 677 }
 678
 679
 680 // this could be used elsewhere as well?
 681 // FIXME: This does not work within mathed!
 682 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 683 {
 684         Point const p = getPos(dit);
 685         if (p.y_ < 0)
 686                 return CUR_ABOVE;
 687         if (p.y_ > workHeight())
 688                 return CUR_BELOW;
 689         return CUR_INSIDE;
 690 }
 691
 692
 693 void BufferView::bookmarkEditPosition()
 694 {
 695         // Don't eat cpu time for each keystroke
 696         if (d->cursor_.paragraph().id() == d->bookmark_edit_position_)
 697                 return;
 698         saveBookmark(0);
 699         d->bookmark_edit_position_ = d->cursor_.paragraph().id();
 700 }
 701
 702
 703 void BufferView::saveBookmark(unsigned int idx)
 704 {
 705         // tentatively save bookmark, id and pos will be used to
 706         // acturately locate a bookmark in a 'live' lyx session.
 707         // pit and pos will be updated with bottom level pit/pos
 708         // when lyx exits.
 709         if (!buffer_.isInternal()) {
 710                 theSession().bookmarks().save(
 711                         buffer_.fileName(),
 712                         d->cursor_.bottom().pit(),
 713                         d->cursor_.bottom().pos(),
 714                         d->cursor_.paragraph().id(),
 715                         d->cursor_.pos(),
 716                         idx
 717                         );
 718                 if (idx)
 719                         // emit message signal.
 720                         message(_("Save bookmark"));
 721         }
 722 }
 723
 724
 725 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 726         int top_id, pos_type top_pos)
 727 {
 728         bool success = false;
 729         DocIterator dit;
 730
 731         d->cursor_.clearSelection();
 732
 733         // if a valid par_id is given, try it first
 734         // This is the case for a 'live' bookmark when unique paragraph ID
 735         // is used to track bookmarks.
 736         if (top_id > 0) {
 737                 dit = buffer_.getParFromID(top_id);
 738                 if (!dit.atEnd()) {
 739                         dit.pos() = min(dit.paragraph().size(), top_pos);
 740                         // Some slices of the iterator may not be
 741                         // reachable (e.g. closed collapsable inset)
 742                         // so the dociterator may need to be
 743                         // shortened. Otherwise, setCursor may crash
 744                         // lyx when the cursor can not be set to these
 745                         // insets.
 746                         size_t const n = dit.depth();
 747                         for (size_t i = 0; i < n; ++i)
 748                                 if (!dit[i].inset().editable()) {
 749                                         dit.resize(i);
 750                                         break;
 751                                 }
 752                         success = true;
 753                 }
 754         }
 755
 756         // if top_id == 0, or searching through top_id failed
 757         // This is the case for a 'restored' bookmark when only bottom
 758         // (document level) pit was saved. Because of this, bookmark
 759         // restoration is inaccurate. If a bookmark was within an inset,
 760         // it will be restored to the left of the outmost inset that contains
 761         // the bookmark.
 762         if (bottom_pit < int(buffer_.paragraphs().size())) {
 763                 dit = doc_iterator_begin(&buffer_);
 764
 765                 dit.pit() = bottom_pit;
 766                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 767                 success = true;
 768         }
 769
 770         if (success) {
 771                 // Note: only bottom (document) level pit is set.
 772                 setCursor(dit);
 773                 // set the current font.
 774                 d->cursor_.setCurrentFont();
 775                 // To center the screen on this new position we need the
 776                 // paragraph position which is computed at draw() time.
 777                 // So we need a redraw!
 778                 buffer_.changed(false);
 779                 if (fitCursor())
 780                         showCursor();
 781         }
 782
 783         return success;
 784 }
 785
 786
 787 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 788 {
 789         if (lyxrc.rtl_support) {
 790                 if (d->cursor_.real_current_font.isRightToLeft()) {
 791                         if (d->intl_.keymap == Intl::PRIMARY)
 792                                 d->intl_.keyMapSec();
 793                 } else {
 794                         if (d->intl_.keymap == Intl::SECONDARY)
 795                                 d->intl_.keyMapPrim();
 796                 }
 797         }
 798
 799         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 800 }
 801
 802
 803 int BufferView::workWidth() const
 804 {
 805         return width_;
 806 }
 807
 808
 809 void BufferView::recenter()
 810 {
 811         showCursor(d->cursor_, true, true);
 812 }
 813
 814
 815 void BufferView::showCursor()
 816 {
 817         showCursor(d->cursor_, false, true);
 818 }
 819
 820
 821 void BufferView::showCursor(DocIterator const & dit,
 822         bool recenter, bool update)
 823 {
 824         if (scrollToCursor(dit, recenter) && update) {
 825                 buffer_.changed(true);
 826                 updateHoveredInset();
 827         }
 828 }
 829
 830
 831 void BufferView::scrollToCursor()
 832 {
 833         if (scrollToCursor(d->cursor_, false)) {
 834                 buffer_.changed(true);
 835                 updateHoveredInset();
 836         }
 837 }
 838
 839
 840 bool BufferView::scrollToCursor(DocIterator const & dit, bool recenter)
 841 {
 842         // We are not properly started yet, delay until resizing is
 843         // done.
 844         if (height_ == 0)
 845                 return false;
 846
 847         LYXERR(Debug::SCROLLING, "recentering!");
 848
 849         CursorSlice const & bot = dit.bottom();
 850         TextMetrics & tm = d->text_metrics_[bot.text()];
 851
 852         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 853         int bot_pit = bot.pit();
 854         if (bot_pit > max_pit) {
 855                 // FIXME: Why does this happen?
 856                 LYXERR0("bottom pit is greater that max pit: "
 857                         << bot_pit << " > " << max_pit);
 858                 bot_pit = max_pit;
 859         }
 860
 861         if (bot_pit == tm.first().first - 1)
 862                 tm.newParMetricsUp();
 863         else if (bot_pit == tm.last().first + 1)
 864                 tm.newParMetricsDown();
 865
 866         if (tm.contains(bot_pit)) {
 867                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 868                 LASSERT(!pm.rows().empty(), /**/);
 869                 // FIXME: smooth scrolling doesn't work in mathed.
 870                 CursorSlice const & cs = dit.innerTextSlice();
 871                 int offset = coordOffset(dit).y_;
 872                 int ypos = pm.position() + offset;
 873                 Dimension const & row_dim =
 874                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 875                 int scrolled = 0;
 876                 if (recenter)
 877                         scrolled = scroll(ypos - height_/2);
 878
 879                 // If the top part of the row falls of the screen, we scroll
 880                 // up to align the top of the row with the top of the screen.
 881                 else if (ypos - row_dim.ascent() < 0)
 882                         scrolled = scrollUp(-ypos + row_dim.ascent());
 883
 884                 // If the bottom of the row falls of the screen, we scroll down.
 885                 // However, we have to be careful not to scroll that much that
 886                 // the top falls of the screen.
 887                 else if (ypos + row_dim.descent() > height_) {
 888                         int ynew = height_ - row_dim.descent();
 889                         if (ynew < row_dim.ascent())
 890                                 ynew = row_dim.ascent();
 891                         int const scroll = ypos - ynew;
 892                         scrolled = scrollDown(scroll);
 893                 }
 894
 895                 // else, nothing to do, the cursor is already visible so we just return.
 896                 return scrolled != 0;
 897         }
 898
 899         // fix inline completion position
 900         if (d->inlineCompletionPos_.fixIfBroken())
 901                 d->inlineCompletionPos_ = DocIterator();
 902
 903         tm.redoParagraph(bot_pit);
 904         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 905         int offset = coordOffset(dit).y_;
 906
 907         d->anchor_pit_ = bot_pit;
 908         CursorSlice const & cs = dit.innerTextSlice();
 909         Dimension const & row_dim =
 910                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 911
 912         if (recenter)
 913                 d->anchor_ypos_ = height_/2;
 914         else if (d->anchor_pit_ == 0)
 915                 d->anchor_ypos_ = offset + pm.ascent();
 916         else if (d->anchor_pit_ == max_pit)
 917                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
 918         else if (offset > height_)
 919                 d->anchor_ypos_ = height_ - offset - defaultRowHeight();
 920         else
 921                 d->anchor_ypos_ = defaultRowHeight() * 2;
 922
 923         return true;
 924 }
 925
 926
 927 void BufferView::updateDocumentClass(DocumentClass const * const olddc)
 928 {
 929         message(_("Converting document to new document class..."));
 930
 931         StableDocIterator backcur(d->cursor_);
 932         ErrorList & el = buffer_.errorList("Class Switch");
 933         cap::switchBetweenClasses(
 934                         olddc, buffer_.params().documentClassPtr(),
 935                         static_cast<InsetText &>(buffer_.inset()), el);
 936
 937         setCursor(backcur.asDocIterator(&buffer_));
 938
 939         buffer_.errors("Class Switch");
 940 }
 941
 942 /** Return the change status at cursor position, taking in account the
 943  * status at each level of the document iterator (a table in a deleted
 944  * footnote is deleted).
 945  * When \param outer is true, the top slice is not looked at.
 946  */
 947 static Change::Type lookupChangeType(DocIterator const & dit, bool outer = false)
 948 {
 949         size_t const depth = dit.depth() - (outer ? 1 : 0);
 950
 951         for (size_t i = 0 ; i < depth ; ++i) {
 952                 CursorSlice const & slice = dit[i];
 953                 if (!slice.inset().inMathed()
 954                     && slice.pos() < slice.paragraph().size()) {
 955                         Change::Type const ch = slice.paragraph().lookupChange(slice.pos()).type;
 956                         if (ch != Change::UNCHANGED)
 957                                 return ch;
 958                 }
 959         }
 960         return Change::UNCHANGED;
 961 }
 962
 963
 964 bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
 965 {
 966         FuncCode const act = cmd.action();
 967
 968         // Can we use a readonly buffer?
 969         if (buffer_.isReadonly()
 970             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
 971             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
 972                 flag.message(from_utf8(N_("Document is read-only")));
 973                 flag.setEnabled(false);
 974                 return true;
 975         }
 976
 977         // Are we in a DELETED change-tracking region?
 978         if (lookupChangeType(d->cursor_, true) == Change::DELETED
 979             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
 980             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
 981                 flag.message(from_utf8(N_("This portion of the document is deleted.")));
 982                 flag.setEnabled(false);
 983                 return true;
 984         }
 985
 986         Cursor & cur = d->cursor_;
 987
 988         if (cur.getStatus(cmd, flag))
 989                 return true;
 990
 991         switch (act) {
 992
 993         // FIXME: This is a bit problematic because we don't check if this is
 994         // a document BufferView or not for these LFUNs. We probably have to
 995         // dispatch both to currentBufferView() and, if that fails,
 996         // to documentBufferView(); same as we do know for current Buffer and
 997         // document Buffer. Ideally those LFUN should go to Buffer as they*
 998         // operate on the full Buffer and the cursor is only needed either for
 999         // an Undo record or to restore a cursor position. But we don't know
1000         // how to do that inside Buffer of course.
1001         case LFUN_BUFFER_PARAMS_APPLY:
1002         case LFUN_LAYOUT_MODULES_CLEAR:
1003         case LFUN_LAYOUT_MODULE_ADD:
1004         case LFUN_LAYOUT_RELOAD:
1005         case LFUN_TEXTCLASS_APPLY:
1006         case LFUN_TEXTCLASS_LOAD:
1007                 flag.setEnabled(!buffer_.isReadonly());
1008                 break;
1009
1010         case LFUN_UNDO:
1011                 flag.setEnabled(buffer_.undo().hasUndoStack());
1012                 break;
1013         case LFUN_REDO:
1014                 flag.setEnabled(buffer_.undo().hasRedoStack());
1015                 break;
1016         case LFUN_FILE_INSERT:
1017         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
1018         case LFUN_FILE_INSERT_PLAINTEXT:
1019         case LFUN_BOOKMARK_SAVE:
1020                 // FIXME: Actually, these LFUNS should be moved to Text
1021                 flag.setEnabled(cur.inTexted());
1022                 break;
1023
1024         case LFUN_FONT_STATE:
1025         case LFUN_LABEL_INSERT:
1026         case LFUN_INFO_INSERT:
1027         case LFUN_PARAGRAPH_GOTO:
1028         case LFUN_NOTE_NEXT:
1029         case LFUN_REFERENCE_NEXT:
1030         case LFUN_WORD_FIND:
1031         case LFUN_WORD_FIND_FORWARD:
1032         case LFUN_WORD_FIND_BACKWARD:
1033         case LFUN_WORD_FINDADV:
1034         case LFUN_WORD_REPLACE:
1035         case LFUN_MARK_OFF:
1036         case LFUN_MARK_ON:
1037         case LFUN_MARK_TOGGLE:
1038         case LFUN_SCREEN_RECENTER:
1039         case LFUN_SCREEN_SHOW_CURSOR:
1040         case LFUN_BIBTEX_DATABASE_ADD:
1041         case LFUN_BIBTEX_DATABASE_DEL:
1042         case LFUN_STATISTICS:
1043         case LFUN_BRANCH_ADD_INSERT:
1044         case LFUN_KEYMAP_OFF:
1045         case LFUN_KEYMAP_PRIMARY:
1046         case LFUN_KEYMAP_SECONDARY:
1047         case LFUN_KEYMAP_TOGGLE:
1048                 flag.setEnabled(true);
1049                 break;
1050
1051         case LFUN_LABEL_GOTO: {
1052                 flag.setEnabled(!cmd.argument().empty()
1053                     || getInsetByCode<InsetRef>(cur, REF_CODE));
1054                 break;
1055         }
1056
1057         case LFUN_CHANGES_TRACK:
1058                 flag.setEnabled(true);
1059                 flag.setOnOff(buffer_.params().trackChanges);
1060                 break;
1061
1062         case LFUN_CHANGES_OUTPUT:
1063                 flag.setEnabled(true);
1064                 flag.setOnOff(buffer_.params().outputChanges);
1065                 break;
1066
1067         case LFUN_CHANGES_MERGE:
1068         case LFUN_CHANGE_NEXT:
1069         case LFUN_CHANGE_PREVIOUS:
1070         case LFUN_ALL_CHANGES_ACCEPT:
1071         case LFUN_ALL_CHANGES_REJECT:
1072                 // TODO: context-sensitive enabling of LFUNs
1073                 // In principle, these command should only be enabled if there
1074                 // is a change in the document. However, without proper
1075                 // optimizations, this will inevitably result in poor performance.
1076                 flag.setEnabled(true);
1077                 break;
1078
1079         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
1080                 flag.setOnOff(buffer_.params().compressed);
1081                 break;
1082         }
1083
1084         case LFUN_BUFFER_TOGGLE_OUTPUT_SYNC: {
1085                 flag.setOnOff(buffer_.params().output_sync);
1086                 break;
1087         }
1088
1089         case LFUN_SCREEN_UP:
1090         case LFUN_SCREEN_DOWN:
1091         case LFUN_SCROLL:
1092         case LFUN_SCREEN_UP_SELECT:
1093         case LFUN_SCREEN_DOWN_SELECT:
1094         case LFUN_INSET_FORALL:
1095                 flag.setEnabled(true);
1096                 break;
1097
1098         case LFUN_LAYOUT_TABULAR:
1099                 flag.setEnabled(cur.innerInsetOfType(TABULAR_CODE));
1100                 break;
1101
1102         case LFUN_LAYOUT:
1103                 flag.setEnabled(!cur.inset().forcePlainLayout(cur.idx()));
1104                 break;
1105
1106         case LFUN_LAYOUT_PARAGRAPH:
1107                 flag.setEnabled(cur.inset().allowParagraphCustomization(cur.idx()));
1108                 break;
1109
1110         case LFUN_DIALOG_SHOW_NEW_INSET:
1111                 // FIXME: this is wrong, but I do not understand the
1112                 // intent (JMarc)
1113                 if (cur.inset().lyxCode() == CAPTION_CODE)
1114                         return cur.inset().getStatus(cur, cmd, flag);
1115                 // FIXME we should consider passthru paragraphs too.
1116                 flag.setEnabled(!cur.inset().getLayout().isPassThru());
1117                 break;
1118
1119         case LFUN_CITATION_INSERT: {
1120                 FuncRequest fr(LFUN_INSET_INSERT, "citation");
1121                 // FIXME: This could turn in a recursive hell.
1122                 // Shouldn't we use Buffer::getStatus() instead?
1123                 flag.setEnabled(lyx::getStatus(fr).enabled());
1124                 break;
1125         }
1126         case LFUN_INSET_APPLY: {
1127                 string const name = cmd.getArg(0);
1128                 Inset * inset = editedInset(name);
1129                 if (inset) {
1130                         FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1131                         if (!inset->getStatus(cur, fr, flag)) {
1132                                 // Every inset is supposed to handle this
1133                                 LASSERT(false, break);
1134                         }
1135                 } else {
1136                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1137                         flag = lyx::getStatus(fr);
1138                 }
1139                 break;
1140         }
1141
1142         default:
1143                 return false;
1144         }
1145
1146         return true;
1147 }
1148
1149
1150 Inset * BufferView::editedInset(string const & name) const
1151 {
1152         map<string, Inset *>::const_iterator it = d->edited_insets_.find(name);
1153         return it == d->edited_insets_.end() ? 0 : it->second;
1154 }
1155
1156
1157 void BufferView::editInset(string const & name, Inset * inset)
1158 {
1159         d->edited_insets_[name] = inset;
1160 }
1161
1162
1163 void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
1164 {
1165         //lyxerr << [ cmd = " << cmd << "]" << endl;
1166
1167         // Make sure that the cached BufferView is correct.
1168         LYXERR(Debug::ACTION, " action[" << cmd.action() << ']'
1169                 << " arg[" << to_utf8(cmd.argument()) << ']'
1170                 << " x[" << cmd.x() << ']'
1171                 << " y[" << cmd.y() << ']'
1172                 << " button[" << cmd.button() << ']');
1173
1174         string const argument = to_utf8(cmd.argument());
1175         Cursor & cur = d->cursor_;
1176
1177         // Don't dispatch function that does not apply to internal buffers.
1178         if (buffer_.isInternal()
1179             && lyxaction.funcHasFlag(cmd.action(), LyXAction::NoInternal))
1180                 return;
1181
1182         // We'll set this back to false if need be.
1183         bool dispatched = true;
1184         buffer_.undo().beginUndoGroup();
1185
1186         FuncCode const act = cmd.action();
1187         switch (act) {
1188
1189         case LFUN_BUFFER_PARAMS_APPLY: {
1190                 DocumentClass const * const oldClass = buffer_.params().documentClassPtr();
1191                 cur.recordUndoFullDocument();
1192                 istringstream ss(to_utf8(cmd.argument()));
1193                 Lexer lex;
1194                 lex.setStream(ss);
1195                 int const unknown_tokens = buffer_.readHeader(lex);
1196                 if (unknown_tokens != 0) {
1197                         LYXERR0("Warning in LFUN_BUFFER_PARAMS_APPLY!\n"
1198                                                 << unknown_tokens << " unknown token"
1199                                                 << (unknown_tokens == 1 ? "" : "s"));
1200                 }
1201                 updateDocumentClass(oldClass);
1202
1203                 // We are most certainly here because of a change in the document
1204                 // It is then better to make sure that all dialogs are in sync with
1205                 // current document settings.
1206                 dr.update(Update::Force | Update::FitCursor);
1207                 dr.forceBufferUpdate();
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                 updateDocumentClass(oldClass);
1218                 dr.update(Update::Force | Update::FitCursor);
1219                 dr.forceBufferUpdate();
1220                 break;
1221         }
1222
1223         case LFUN_LAYOUT_MODULE_ADD: {
1224                 BufferParams const & params = buffer_.params();
1225                 if (!params.moduleCanBeAdded(argument)) {
1226                         LYXERR0("Module `" << argument <<
1227                                 "' cannot be added due to failed requirements or "
1228                                 "conflicts with installed modules.");
1229                         break;
1230                 }
1231                 DocumentClass const * const oldClass = params.documentClassPtr();
1232                 cur.recordUndoFullDocument();
1233                 buffer_.params().addLayoutModule(argument);
1234                 buffer_.params().makeDocumentClass();
1235                 updateDocumentClass(oldClass);
1236                 dr.update(Update::Force | Update::FitCursor);
1237                 dr.forceBufferUpdate();
1238                 break;
1239         }
1240
1241         case LFUN_TEXTCLASS_APPLY: {
1242                 if (!LayoutFileList::get().load(argument, buffer_.temppath()) &&
1243                         !LayoutFileList::get().load(argument, buffer_.filePath()))
1244                         break;
1245
1246                 LayoutFile const * old_layout = buffer_.params().baseClass();
1247                 LayoutFile const * new_layout = &(LayoutFileList::get()[argument]);
1248
1249                 if (old_layout == new_layout)
1250                         // nothing to do
1251                         break;
1252
1253                 //Save the old, possibly modular, layout for use in conversion.
1254                 DocumentClass const * const oldDocClass =
1255                         buffer_.params().documentClassPtr();
1256                 cur.recordUndoFullDocument();
1257                 buffer_.params().setBaseClass(argument);
1258                 buffer_.params().makeDocumentClass();
1259                 updateDocumentClass(oldDocClass);
1260                 dr.update(Update::Force | Update::FitCursor);
1261                 dr.forceBufferUpdate();
1262                 break;
1263         }
1264
1265         case LFUN_TEXTCLASS_LOAD:
1266                 LayoutFileList::get().load(argument, buffer_.temppath()) ||
1267                 LayoutFileList::get().load(argument, buffer_.filePath());
1268                 break;
1269
1270         case LFUN_LAYOUT_RELOAD: {
1271                 DocumentClass const * const oldClass = buffer_.params().documentClassPtr();
1272                 LayoutFileIndex bc = buffer_.params().baseClassID();
1273                 LayoutFileList::get().reset(bc);
1274                 buffer_.params().setBaseClass(bc);
1275                 buffer_.params().makeDocumentClass();
1276                 updateDocumentClass(oldClass);
1277                 dr.update(Update::Force | Update::FitCursor);
1278                 dr.forceBufferUpdate();
1279                 break;
1280         }
1281
1282         case LFUN_UNDO:
1283                 dr.setMessage(_("Undo"));
1284                 cur.clearSelection();
1285                 if (!cur.textUndo())
1286                         dr.setMessage(_("No further undo information"));
1287                 else
1288                         dr.update(Update::Force | Update::FitCursor);
1289                 dr.forceBufferUpdate();
1290                 break;
1291
1292         case LFUN_REDO:
1293                 dr.setMessage(_("Redo"));
1294                 cur.clearSelection();
1295                 if (!cur.textRedo())
1296                         dr.setMessage(_("No further redo information"));
1297                 else
1298                         dr.update(Update::Force | Update::FitCursor);
1299                 dr.forceBufferUpdate();
1300                 break;
1301
1302         case LFUN_FONT_STATE:
1303                 dr.setMessage(cur.currentState());
1304                 break;
1305
1306         case LFUN_BOOKMARK_SAVE:
1307                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1308                 break;
1309
1310         case LFUN_LABEL_GOTO: {
1311                 docstring label = cmd.argument();
1312                 if (label.empty()) {
1313                         InsetRef * inset =
1314                                 getInsetByCode<InsetRef>(cur, REF_CODE);
1315                         if (inset) {
1316                                 label = inset->getParam("reference");
1317                                 // persistent=false: use temp_bookmark
1318                                 saveBookmark(0);
1319                         }
1320                 }
1321                 if (!label.empty())
1322                         gotoLabel(label);
1323                 break;
1324         }
1325
1326         case LFUN_PARAGRAPH_GOTO: {
1327                 int const id = convert<int>(cmd.getArg(0));
1328                 int const pos = convert<int>(cmd.getArg(1));
1329                 int i = 0;
1330                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1331                         b = theBufferList().next(b)) {
1332
1333                         DocIterator dit = b->getParFromID(id);
1334                         if (dit.atEnd()) {
1335                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1336                                 ++i;
1337                                 continue;
1338                         }
1339                         LYXERR(Debug::INFO, "Paragraph " << dit.paragraph().id()
1340                                 << " found in buffer `"
1341                                 << b->absFileName() << "'.");
1342
1343                         if (b == &buffer_) {
1344                                 // Set the cursor
1345                                 dit.pos() = pos;
1346                                 setCursor(dit);
1347                                 dr.update(Update::Force | Update::FitCursor);
1348                         } else {
1349                                 // Switch to other buffer view and resend cmd
1350                                 lyx::dispatch(FuncRequest(
1351                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1352                                 lyx::dispatch(cmd);
1353                         }
1354                         break;
1355                 }
1356                 break;
1357         }
1358
1359         case LFUN_NOTE_NEXT:
1360                 gotoInset(this, NOTE_CODE, false);
1361                 break;
1362
1363         case LFUN_REFERENCE_NEXT: {
1364                 vector<InsetCode> tmp;
1365                 tmp.push_back(LABEL_CODE);
1366                 tmp.push_back(REF_CODE);
1367                 gotoInset(this, tmp, true);
1368                 break;
1369         }
1370
1371         case LFUN_CHANGES_TRACK:
1372                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
1373                 break;
1374
1375         case LFUN_CHANGES_OUTPUT:
1376                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
1377                 if (buffer_.params().outputChanges) {
1378                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
1379                         bool xcolorulem = LaTeXFeatures::isAvailable("ulem") &&
1380                                           LaTeXFeatures::isAvailable("xcolor");
1381
1382                         if (!dvipost && !xcolorulem) {
1383                                 Alert::warning(_("Changes not shown in LaTeX output"),
1384                                                _("Changes will not be highlighted in LaTeX output, "
1385                                                  "because neither dvipost nor xcolor/ulem are installed.\n"
1386                                                  "Please install these packages or redefine "
1387                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1388                         } else if (!xcolorulem) {
1389                                 Alert::warning(_("Changes not shown in LaTeX output"),
1390                                                _("Changes will not be highlighted in LaTeX output "
1391                                                  "when using pdflatex, because xcolor and ulem are not installed.\n"
1392                                                  "Please install both packages or redefine "
1393                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1394                         }
1395                 }
1396                 break;
1397
1398         case LFUN_CHANGE_NEXT:
1399                 findNextChange(this);
1400                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1401                 dr.update(Update::Force | Update::FitCursor);
1402                 break;
1403
1404         case LFUN_CHANGE_PREVIOUS:
1405                 findPreviousChange(this);
1406                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1407                 dr.update(Update::Force | Update::FitCursor);
1408                 break;
1409
1410         case LFUN_CHANGES_MERGE:
1411                 if (findNextChange(this) || findPreviousChange(this)) {
1412                         dr.update(Update::Force | Update::FitCursor);
1413                         dr.forceBufferUpdate();
1414                         showDialog("changes");
1415                 }
1416                 break;
1417
1418         case LFUN_ALL_CHANGES_ACCEPT:
1419                 // select complete document
1420                 cur.reset();
1421                 cur.selHandle(true);
1422                 buffer_.text().cursorBottom(cur);
1423                 // accept everything in a single step to support atomic undo
1424                 buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
1425                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1426                 dr.update(Update::Force | Update::FitCursor);
1427                 dr.forceBufferUpdate();
1428                 break;
1429
1430         case LFUN_ALL_CHANGES_REJECT:
1431                 // select complete document
1432                 cur.reset();
1433                 cur.selHandle(true);
1434                 buffer_.text().cursorBottom(cur);
1435                 // reject everything in a single step to support atomic undo
1436                 // Note: reject does not work recursively; the user may have to repeat the operation
1437                 buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
1438                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1439                 dr.update(Update::Force | Update::FitCursor);
1440                 dr.forceBufferUpdate();
1441                 break;
1442
1443         case LFUN_WORD_FIND_FORWARD:
1444         case LFUN_WORD_FIND_BACKWARD: {
1445                 static docstring last_search;
1446                 docstring searched_string;
1447
1448                 if (!cmd.argument().empty()) {
1449                         last_search = cmd.argument();
1450                         searched_string = cmd.argument();
1451                 } else {
1452                         searched_string = last_search;
1453                 }
1454
1455                 if (searched_string.empty())
1456                         break;
1457
1458                 bool const fw = act == LFUN_WORD_FIND_FORWARD;
1459                 docstring const data =
1460                         find2string(searched_string, true, false, fw);
1461                 find(this, FuncRequest(LFUN_WORD_FIND, data));
1462                 break;
1463         }
1464
1465         case LFUN_WORD_FIND: {
1466                 FuncRequest req = cmd;
1467                 if (cmd.argument().empty() && !d->search_request_cache_.argument().empty())
1468                         req = d->search_request_cache_;
1469                 if (req.argument().empty()) {
1470                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
1471                         break;
1472                 }
1473                 if (find(this, req))
1474                         showCursor();
1475                 else
1476                         message(_("String not found!"));
1477                 d->search_request_cache_ = req;
1478                 break;
1479         }
1480
1481         case LFUN_WORD_REPLACE: {
1482                 bool has_deleted = false;
1483                 if (cur.selection()) {
1484                         DocIterator beg = cur.selectionBegin();
1485                         DocIterator end = cur.selectionEnd();
1486                         if (beg.pit() == end.pit()) {
1487                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1488                                         if (!cur.inMathed()
1489                                             && cur.paragraph().isDeleted(p))
1490                                                 has_deleted = true;
1491                                 }
1492                         }
1493                 }
1494                 replace(this, cmd, has_deleted);
1495                 dr.forceBufferUpdate();
1496                 break;
1497         }
1498
1499         case LFUN_WORD_FINDADV: {
1500                 FindAndReplaceOptions opt;
1501                 istringstream iss(to_utf8(cmd.argument()));
1502                 iss >> opt;
1503                 if (findAdv(this, opt))
1504                         cur.dispatched();
1505                 else
1506                         cur.undispatched();
1507                 break;
1508         }
1509
1510         case LFUN_MARK_OFF:
1511                 cur.clearSelection();
1512                 dr.setMessage(from_utf8(N_("Mark off")));
1513                 break;
1514
1515         case LFUN_MARK_ON:
1516                 cur.clearSelection();
1517                 cur.setMark(true);
1518                 dr.setMessage(from_utf8(N_("Mark on")));
1519                 break;
1520
1521         case LFUN_MARK_TOGGLE:
1522                 cur.setSelection(false);
1523                 if (cur.mark()) {
1524                         cur.setMark(false);
1525                         dr.setMessage(from_utf8(N_("Mark removed")));
1526                 } else {
1527                         cur.setMark(true);
1528                         dr.setMessage(from_utf8(N_("Mark set")));
1529                 }
1530                 cur.resetAnchor();
1531                 break;
1532
1533         case LFUN_SCREEN_SHOW_CURSOR:
1534                 showCursor();
1535                 break;
1536
1537         case LFUN_SCREEN_RECENTER:
1538                 recenter();
1539                 break;
1540
1541         case LFUN_BIBTEX_DATABASE_ADD: {
1542                 Cursor tmpcur = cur;
1543                 findInset(tmpcur, BIBTEX_CODE, false);
1544                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1545                                                 BIBTEX_CODE);
1546                 if (inset) {
1547                         if (inset->addDatabase(cmd.argument()))
1548                                 buffer_.updateBibfilesCache();
1549                 }
1550                 break;
1551         }
1552
1553         case LFUN_BIBTEX_DATABASE_DEL: {
1554                 Cursor tmpcur = cur;
1555                 findInset(tmpcur, BIBTEX_CODE, false);
1556                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1557                                                 BIBTEX_CODE);
1558                 if (inset) {
1559                         if (inset->delDatabase(cmd.argument()))
1560                                 buffer_.updateBibfilesCache();
1561                 }
1562                 break;
1563         }
1564
1565         case LFUN_STATISTICS: {
1566                 DocIterator from, to;
1567                 if (cur.selection()) {
1568                         from = cur.selectionBegin();
1569                         to = cur.selectionEnd();
1570                 } else {
1571                         from = doc_iterator_begin(&buffer_);
1572                         to = doc_iterator_end(&buffer_);
1573                 }
1574                 int const words = countWords(from, to);
1575                 int const chars = countChars(from, to, false);
1576                 int const chars_blanks = countChars(from, to, true);
1577                 docstring message;
1578                 if (cur.selection())
1579                         message = _("Statistics for the selection:");
1580                 else
1581                         message = _("Statistics for the document:");
1582                 message += "\n\n";
1583                 if (words != 1)
1584                         message += bformat(_("%1$d words"), words);
1585                 else
1586                         message += _("One word");
1587                 message += "\n";
1588                 if (chars_blanks != 1)
1589                         message += bformat(_("%1$d characters (including blanks)"),
1590                                           chars_blanks);
1591                 else
1592                         message += _("One character (including blanks)");
1593                 message += "\n";
1594                 if (chars != 1)
1595                         message += bformat(_("%1$d characters (excluding blanks)"),
1596                                           chars);
1597                 else
1598                         message += _("One character (excluding blanks)");
1599
1600                 Alert::information(_("Statistics"), message);
1601         }
1602                 break;
1603
1604         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1605                 // turn compression on/off
1606                 buffer_.params().compressed = !buffer_.params().compressed;
1607                 break;
1608
1609         case LFUN_BUFFER_TOGGLE_OUTPUT_SYNC:
1610                 buffer_.params().output_sync = !buffer_.params().output_sync;
1611                 break;
1612
1613         case LFUN_SCREEN_UP:
1614         case LFUN_SCREEN_DOWN: {
1615                 Point p = getPos(cur);
1616                 // This code has been commented out to enable to scroll down a
1617                 // document, even if there are large insets in it (see bug #5465).
1618                 /*if (p.y_ < 0 || p.y_ > height_) {
1619                         // The cursor is off-screen so recenter before proceeding.
1620                         showCursor();
1621                         p = getPos(cur);
1622                 }*/
1623                 int const scrolled = scroll(act == LFUN_SCREEN_UP
1624                         ? -height_ : height_);
1625                 if (act == LFUN_SCREEN_UP && scrolled > -height_)
1626                         p = Point(0, 0);
1627                 if (act == LFUN_SCREEN_DOWN && scrolled < height_)
1628                         p = Point(width_, height_);
1629                 Cursor old = cur;
1630                 bool const in_texted = cur.inTexted();
1631                 cur.reset();
1632                 buffer_.changed(true);
1633                 updateHoveredInset();
1634
1635                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
1636                         true, act == LFUN_SCREEN_UP);
1637                 //FIXME: what to do with cur.x_target()?
1638                 bool update = in_texted && cur.bv().checkDepm(cur, old);
1639                 cur.finishUndo();
1640                 if (update) {
1641                         dr.update(Update::Force | Update::FitCursor);
1642                         dr.forceBufferUpdate();
1643                 }
1644                 break;
1645         }
1646
1647         case LFUN_SCROLL:
1648                 lfunScroll(cmd);
1649                 dr.forceBufferUpdate();
1650                 break;
1651
1652         case LFUN_SCREEN_UP_SELECT: {
1653                 cur.selHandle(true);
1654                 if (isTopScreen()) {
1655                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1656                         cur.finishUndo();
1657                         break;
1658                 }
1659                 int y = getPos(cur).y_;
1660                 int const ymin = y - height_ + defaultRowHeight();
1661                 while (y > ymin && cur.up())
1662                         y = getPos(cur).y_;
1663
1664                 cur.finishUndo();
1665                 dr.update(Update::SinglePar | Update::FitCursor);
1666                 break;
1667         }
1668
1669         case LFUN_SCREEN_DOWN_SELECT: {
1670                 cur.selHandle(true);
1671                 if (isBottomScreen()) {
1672                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1673                         cur.finishUndo();
1674                         break;
1675                 }
1676                 int y = getPos(cur).y_;
1677                 int const ymax = y + height_ - defaultRowHeight();
1678                 while (y < ymax && cur.down())
1679                         y = getPos(cur).y_;
1680
1681                 cur.finishUndo();
1682                 dr.update(Update::SinglePar | Update::FitCursor);
1683                 break;
1684         }
1685
1686
1687         // This would be in Buffer class if only Cursor did not
1688         // require a bufferview
1689         case LFUN_INSET_FORALL: {
1690                 docstring const name = from_utf8(cmd.getArg(0));
1691                 string const commandstr = cmd.getLongArg(1);
1692                 FuncRequest const fr = lyxaction.lookupFunc(commandstr);
1693
1694                 // an arbitrary number to limit number of iterations
1695                 const int max_iter = 10000;
1696                 int iterations = 0;
1697                 Cursor & cur = d->cursor_;
1698                 Cursor const savecur = cur;
1699                 cur.reset();
1700                 if (!cur.nextInset())
1701                         cur.forwardInset();
1702                 cur.beginUndoGroup();
1703                 while(cur && iterations < max_iter) {
1704                         Inset * ins = cur.nextInset();
1705                         if (!ins)
1706                                 break;
1707                         docstring insname = ins->name();
1708                         while (!insname.empty()) {
1709                                 if (insname == name || name == from_utf8("*")) {
1710                                         cur.recordUndo();
1711                                         lyx::dispatch(fr, dr);
1712                                         ++iterations;
1713                                         break;
1714                                 }
1715                                 size_t const i = insname.rfind(':');
1716                                 if (i == string::npos)
1717                                         break;
1718                                 insname = insname.substr(0, i);
1719                         }
1720                         cur.forwardInset();
1721                 }
1722                 cur.endUndoGroup();
1723                 cur = savecur;
1724                 cur.fixIfBroken();
1725                 dr.update(Update::Force);
1726                 dr.forceBufferUpdate();
1727
1728                 if (iterations >= max_iter) {
1729                         dr.setError(true);
1730                         dr.setMessage(bformat(_("`inset-forall' interrupted because number of actions is larger than %1$d"), max_iter));
1731                 } else
1732                         dr.setMessage(bformat(_("Applied \"%1$s\" to %2$d insets"), from_utf8(commandstr), iterations));
1733                 break;
1734         }
1735
1736
1737         case LFUN_BRANCH_ADD_INSERT: {
1738                 docstring branch_name = from_utf8(cmd.getArg(0));
1739                 if (branch_name.empty())
1740                         if (!Alert::askForText(branch_name, _("Branch name")) ||
1741                                                 branch_name.empty())
1742                                 break;
1743
1744                 DispatchResult drtmp;
1745                 buffer_.dispatch(FuncRequest(LFUN_BRANCH_ADD, branch_name), drtmp);
1746                 if (drtmp.error()) {
1747                         Alert::warning(_("Branch already exists"), drtmp.message());
1748                         break;
1749                 }
1750                 BranchList & branch_list = buffer_.params().branchlist();
1751                 vector<docstring> const branches =
1752                         getVectorFromString(branch_name, branch_list.separator());
1753                 for (vector<docstring>::const_iterator it = branches.begin();
1754                      it != branches.end(); ++it) {
1755                         branch_name = *it;
1756                         lyx::dispatch(FuncRequest(LFUN_BRANCH_INSERT, branch_name));
1757                 }
1758                 break;
1759         }
1760
1761         case LFUN_KEYMAP_OFF:
1762                 getIntl().keyMapOn(false);
1763                 break;
1764
1765         case LFUN_KEYMAP_PRIMARY:
1766                 getIntl().keyMapPrim();
1767                 break;
1768
1769         case LFUN_KEYMAP_SECONDARY:
1770                 getIntl().keyMapSec();
1771                 break;
1772
1773         case LFUN_KEYMAP_TOGGLE:
1774                 getIntl().toggleKeyMap();
1775                 break;
1776
1777         case LFUN_DIALOG_SHOW_NEW_INSET: {
1778                 string const name = cmd.getArg(0);
1779                 string data = trim(to_utf8(cmd.argument()).substr(name.size()));
1780                 if (decodeInsetParam(name, data, buffer_))
1781                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, name + " " + data));
1782                 else
1783                         lyxerr << "Inset type '" << name <<
1784                         "' not recognized in LFUN_DIALOG_SHOW_NEW_INSET" <<  endl;
1785                 break;
1786         }
1787
1788         case LFUN_CITATION_INSERT: {
1789                 if (argument.empty()) {
1790                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW_NEW_INSET, "citation"));
1791                         break;
1792                 }
1793                 // we can have one optional argument, delimited by '|'
1794                 // citation-insert <key>|<text_before>
1795                 // this should be enhanced to also support text_after
1796                 // and citation style
1797                 string arg = argument;
1798                 string opt1;
1799                 if (contains(argument, "|")) {
1800                         arg = token(argument, '|', 0);
1801                         opt1 = token(argument, '|', 1);
1802                 }
1803                 InsetCommandParams icp(CITE_CODE);
1804                 icp["key"] = from_utf8(arg);
1805                 if (!opt1.empty())
1806                         icp["before"] = from_utf8(opt1);
1807                 string icstr = InsetCommand::params2string("citation", icp);
1808                 FuncRequest fr(LFUN_INSET_INSERT, icstr);
1809                 lyx::dispatch(fr);
1810                 break;
1811         }
1812
1813         case LFUN_INSET_APPLY: {
1814                 string const name = cmd.getArg(0);
1815                 Inset * inset = editedInset(name);
1816                 if (!inset) {
1817                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1818                         lyx::dispatch(fr);
1819                         break;
1820                 }
1821                 // put cursor in front of inset.
1822                 if (!setCursorFromInset(inset)) {
1823                         LASSERT(false, break);
1824                 }
1825                 cur.recordUndo();
1826                 FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1827                 inset->dispatch(cur, fr);
1828                 dr.update(Update::SinglePar | Update::FitCursor);
1829                 dr.forceBufferUpdate();
1830                 break;
1831         }
1832
1833         default:
1834                 dispatched = false;
1835                 break;
1836         }
1837
1838         buffer_.undo().endUndoGroup();
1839         dr.dispatched(dispatched);
1840         return;
1841 }
1842
1843
1844 docstring const BufferView::requestSelection()
1845 {
1846         Cursor & cur = d->cursor_;
1847
1848         LYXERR(Debug::SELECTION, "requestSelection: cur.selection: " << cur.selection());
1849         if (!cur.selection()) {
1850                 d->xsel_cache_.set = false;
1851                 return docstring();
1852         }
1853
1854         LYXERR(Debug::SELECTION, "requestSelection: xsel_cache.set: " << d->xsel_cache_.set);
1855         if (!d->xsel_cache_.set ||
1856             cur.top() != d->xsel_cache_.cursor ||
1857             cur.realAnchor().top() != d->xsel_cache_.anchor)
1858         {
1859                 d->xsel_cache_.cursor = cur.top();
1860                 d->xsel_cache_.anchor = cur.realAnchor().top();
1861                 d->xsel_cache_.set = cur.selection();
1862                 return cur.selectionAsString(false);
1863         }
1864         return docstring();
1865 }
1866
1867
1868 void BufferView::clearSelection()
1869 {
1870         d->cursor_.clearSelection();
1871         // Clear the selection buffer. Otherwise a subsequent
1872         // middle-mouse-button paste would use the selection buffer,
1873         // not the more current external selection.
1874         cap::clearSelection();
1875         d->xsel_cache_.set = false;
1876         // The buffer did not really change, but this causes the
1877         // redraw we need because we cleared the selection above.
1878         buffer_.changed(false);
1879 }
1880
1881
1882 void BufferView::resize(int width, int height)
1883 {
1884         // Update from work area
1885         width_ = width;
1886         height_ = height;
1887
1888         // Clear the paragraph height cache.
1889         d->par_height_.clear();
1890         // Redo the metrics.
1891         updateMetrics();
1892 }
1893
1894
1895 Inset const * BufferView::getCoveringInset(Text const & text,
1896                 int x, int y) const
1897 {
1898         TextMetrics & tm = d->text_metrics_[&text];
1899         Inset * inset = tm.checkInsetHit(x, y);
1900         if (!inset)
1901                 return 0;
1902
1903         if (!inset->descendable(*this))
1904                 // No need to go further down if the inset is not
1905                 // descendable.
1906                 return inset;
1907
1908         size_t cell_number = inset->nargs();
1909         // Check all the inner cell.
1910         for (size_t i = 0; i != cell_number; ++i) {
1911                 Text const * inner_text = inset->getText(i);
1912                 if (inner_text) {
1913                         // Try deeper.
1914                         Inset const * inset_deeper =
1915                                 getCoveringInset(*inner_text, x, y);
1916                         if (inset_deeper)
1917                                 return inset_deeper;
1918                 }
1919         }
1920
1921         return inset;
1922 }
1923
1924
1925 void BufferView::updateHoveredInset() const
1926 {
1927         // Get inset under mouse, if there is one.
1928         Inset const * covering_inset = getCoveringInset(buffer_.text(),
1929                         d->mouse_position_cache_.x_, d->mouse_position_cache_.y_);
1930         if (covering_inset == d->last_inset_)
1931                 // Same inset, no need to do anything...
1932                 return;
1933
1934         bool need_redraw = false;
1935         if (d->last_inset_) {
1936                 // Remove the hint on the last hovered inset (if any).
1937                 need_redraw |= d->last_inset_->setMouseHover(this, false);
1938                 d->last_inset_ = 0;
1939         }
1940
1941         // const_cast because of setMouseHover().
1942         Inset * inset = const_cast<Inset *>(covering_inset);
1943         if (inset && inset->setMouseHover(this, true)) {
1944                 need_redraw = true;
1945                 // Only the insets that accept the hover state, do
1946                 // clear the last_inset_, so only set the last_inset_
1947                 // member if the hovered setting is accepted.
1948                 d->last_inset_ = inset;
1949         }
1950
1951         if (need_redraw) {
1952                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
1953                                 << d->mouse_position_cache_.x_ << ", "
1954                                 << d->mouse_position_cache_.y_ << ")");
1955
1956                 d->update_strategy_ = DecorationUpdate;
1957
1958                 // This event (moving without mouse click) is not passed further.
1959                 // This should be changed if it is further utilized.
1960                 buffer_.changed(false);
1961         }
1962 }
1963
1964
1965 void BufferView::clearLastInset(Inset * inset) const
1966 {
1967         if (d->last_inset_ != inset) {
1968                 LYXERR0("Wrong last_inset!");
1969                 LASSERT(false, /**/);
1970         }
1971         d->last_inset_ = 0;
1972 }
1973
1974
1975 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
1976 {
1977         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
1978
1979         // This is only called for mouse related events including
1980         // LFUN_FILE_OPEN generated by drag-and-drop.
1981         FuncRequest cmd = cmd0;
1982
1983         Cursor old = cursor();
1984         Cursor cur(*this);
1985         cur.push(buffer_.inset());
1986         cur.setSelection(d->cursor_.selection());
1987
1988         // Either the inset under the cursor or the
1989         // surrounding Text will handle this event.
1990
1991         // make sure we stay within the screen...
1992         cmd.set_y(min(max(cmd.y(), -1), height_));
1993
1994         d->mouse_position_cache_.x_ = cmd.x();
1995         d->mouse_position_cache_.y_ = cmd.y();
1996
1997         if (cmd.action() == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1998                 updateHoveredInset();
1999                 return;
2000         }
2001
2002         // Build temporary cursor.
2003         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x(), cmd.y());
2004
2005         // Put anchor at the same position.
2006         cur.resetAnchor();
2007
2008         cur.beginUndoGroup();
2009
2010         // Try to dispatch to an non-editable inset near this position
2011         // via the temp cursor. If the inset wishes to change the real
2012         // cursor it has to do so explicitly by using
2013         //  cur.bv().cursor() = cur;  (or similar)
2014         if (inset)
2015                 inset->dispatch(cur, cmd);
2016
2017         // Now dispatch to the temporary cursor. If the real cursor should
2018         // be modified, the inset's dispatch has to do so explicitly.
2019         if (!inset || !cur.result().dispatched())
2020                 cur.dispatch(cmd);
2021
2022         cur.endUndoGroup();
2023
2024         // Notify left insets
2025         if (cur != old) {
2026                 old.fixIfBroken();
2027                 bool badcursor = notifyCursorLeavesOrEnters(old, cur);
2028                 if (badcursor)
2029                         cursor().fixIfBroken();
2030         }
2031
2032         // Do we have a selection?
2033         theSelection().haveSelection(cursor().selection());
2034
2035         // If the command has been dispatched,
2036         if (cur.result().dispatched() || cur.result().update())
2037                 processUpdateFlags(cur.result().update());
2038 }
2039
2040
2041 void BufferView::lfunScroll(FuncRequest const & cmd)
2042 {
2043         string const scroll_type = cmd.getArg(0);
2044         int scroll_step = 0;
2045         if (scroll_type == "line")
2046                 scroll_step = d->scrollbarParameters_.single_step;
2047         else if (scroll_type == "page")
2048                 scroll_step = d->scrollbarParameters_.page_step;
2049         else
2050                 return;
2051         string const scroll_quantity = cmd.getArg(1);
2052         if (scroll_quantity == "up")
2053                 scrollUp(scroll_step);
2054         else if (scroll_quantity == "down")
2055                 scrollDown(scroll_step);
2056         else {
2057                 int const scroll_value = convert<int>(scroll_quantity);
2058                 if (scroll_value)
2059                         scroll(scroll_step * scroll_value);
2060         }
2061         buffer_.changed(true);
2062         updateHoveredInset();
2063 }
2064
2065
2066 int BufferView::minVisiblePart()
2067 {
2068         return 2 * defaultRowHeight();
2069 }
2070
2071
2072 int BufferView::scroll(int y)
2073 {
2074         if (y > 0)
2075                 return scrollDown(y);
2076         if (y < 0)
2077                 return scrollUp(-y);
2078         return 0;
2079 }
2080
2081
2082 int BufferView::scrollDown(int offset)
2083 {
2084         Text * text = &buffer_.text();
2085         TextMetrics & tm = d->text_metrics_[text];
2086         int const ymax = height_ + offset;
2087         while (true) {
2088                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
2089                 int bottom_pos = last.second->position() + last.second->descent();
2090                 if (lyxrc.scroll_below_document)
2091                         bottom_pos += height_ - minVisiblePart();
2092                 if (last.first + 1 == int(text->paragraphs().size())) {
2093                         if (bottom_pos <= height_)
2094                                 return 0;
2095                         offset = min(offset, bottom_pos - height_);
2096                         break;
2097                 }
2098                 if (bottom_pos > ymax)
2099                         break;
2100                 tm.newParMetricsDown();
2101         }
2102         d->anchor_ypos_ -= offset;
2103         return -offset;
2104 }
2105
2106
2107 int BufferView::scrollUp(int offset)
2108 {
2109         Text * text = &buffer_.text();
2110         TextMetrics & tm = d->text_metrics_[text];
2111         int ymin = - offset;
2112         while (true) {
2113                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
2114                 int top_pos = first.second->position() - first.second->ascent();
2115                 if (first.first == 0) {
2116                         if (top_pos >= 0)
2117                                 return 0;
2118                         offset = min(offset, - top_pos);
2119                         break;
2120                 }
2121                 if (top_pos < ymin)
2122                         break;
2123                 tm.newParMetricsUp();
2124         }
2125         d->anchor_ypos_ += offset;
2126         return offset;
2127 }
2128
2129
2130 void BufferView::setCursorFromRow(int row)
2131 {
2132         int tmpid = -1;
2133         int tmppos = -1;
2134
2135         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
2136
2137         d->cursor_.reset();
2138         if (tmpid == -1)
2139                 buffer_.text().setCursor(d->cursor_, 0, 0);
2140         else
2141                 buffer_.text().setCursor(d->cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
2142         recenter();
2143 }
2144
2145
2146 bool BufferView::setCursorFromInset(Inset const * inset)
2147 {
2148         // are we already there?
2149         if (cursor().nextInset() == inset)
2150                 return true;
2151
2152         // Inset is not at cursor position. Find it in the document.
2153         Cursor cur(*this);
2154         cur.reset();
2155         while (cur && cur.nextInset() != inset)
2156                 cur.forwardInset();
2157
2158         if (cur) {
2159                 setCursor(cur);
2160                 return true;
2161         }
2162         return false;
2163 }
2164
2165
2166 void BufferView::gotoLabel(docstring const & label)
2167 {
2168         std::vector<Buffer const *> bufs = buffer().allRelatives();
2169         std::vector<Buffer const *>::iterator it = bufs.begin();
2170         for (; it != bufs.end(); ++it) {
2171                 Buffer const * buf = *it;
2172
2173                 // find label
2174                 Toc & toc = buf->tocBackend().toc("label");
2175                 TocIterator toc_it = toc.begin();
2176                 TocIterator end = toc.end();
2177                 for (; toc_it != end; ++toc_it) {
2178                         if (label == toc_it->str()) {
2179                                 lyx::dispatch(toc_it->action());
2180                                 return;
2181                         }
2182                 }
2183         }
2184 }
2185
2186
2187 TextMetrics const & BufferView::textMetrics(Text const * t) const
2188 {
2189         return const_cast<BufferView *>(this)->textMetrics(t);
2190 }
2191
2192
2193 TextMetrics & BufferView::textMetrics(Text const * t)
2194 {
2195         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
2196         if (tmc_it == d->text_metrics_.end()) {
2197                 tmc_it = d->text_metrics_.insert(
2198                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
2199         }
2200         return tmc_it->second;
2201 }
2202
2203
2204 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
2205                 pit_type pit) const
2206 {
2207         return textMetrics(t).parMetrics(pit);
2208 }
2209
2210
2211 int BufferView::workHeight() const
2212 {
2213         return height_;
2214 }
2215
2216
2217 void BufferView::setCursor(DocIterator const & dit)
2218 {
2219         d->cursor_.reset();
2220         size_t const n = dit.depth();
2221         for (size_t i = 0; i < n; ++i)
2222                 dit[i].inset().edit(d->cursor_, true);
2223
2224         d->cursor_.setCursor(dit);
2225         d->cursor_.setSelection(false);
2226 }
2227
2228
2229 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
2230 {
2231         // Would be wrong to delete anything if we have a selection.
2232         if (cur.selection())
2233                 return false;
2234
2235         bool need_anchor_change = false;
2236         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
2237                 need_anchor_change);
2238
2239         if (need_anchor_change)
2240                 cur.resetAnchor();
2241
2242         if (!changed)
2243                 return false;
2244
2245         d->cursor_ = cur;
2246
2247         cur.forceBufferUpdate();
2248         buffer_.changed(true);
2249         return true;
2250 }
2251
2252
2253 bool BufferView::mouseSetCursor(Cursor & cur, bool select)
2254 {
2255         LASSERT(&cur.bv() == this, /**/);
2256
2257         if (!select)
2258                 // this event will clear selection so we save selection for
2259                 // persistent selection
2260                 cap::saveSelection(cursor());
2261
2262         d->cursor_.macroModeClose();
2263
2264         // Has the cursor just left the inset?
2265         bool leftinset = (&d->cursor_.inset() != &cur.inset());
2266         if (leftinset)
2267                 d->cursor_.fixIfBroken();
2268
2269         // FIXME: shift-mouse selection doesn't work well across insets.
2270         bool do_selection = select && &d->cursor_.normalAnchor().inset() == &cur.inset();
2271
2272         // do the dEPM magic if needed
2273         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
2274         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
2275         // the leftinset bool would not be necessary (badcursor instead).
2276         bool update = leftinset;
2277         if (!do_selection && d->cursor_.inTexted())
2278                 update |= checkDepm(cur, d->cursor_);
2279
2280         if (!do_selection)
2281                 d->cursor_.resetAnchor();
2282         d->cursor_.setCursor(cur);
2283         d->cursor_.boundary(cur.boundary());
2284         if (do_selection)
2285                 d->cursor_.setSelection();
2286         else
2287                 d->cursor_.clearSelection();
2288
2289         d->cursor_.finishUndo();
2290         d->cursor_.setCurrentFont();
2291         if (update)
2292                 cur.forceBufferUpdate();
2293         return update;
2294 }
2295
2296
2297 void BufferView::putSelectionAt(DocIterator const & cur,
2298                                 int length, bool backwards)
2299 {
2300         d->cursor_.clearSelection();
2301
2302         setCursor(cur);
2303
2304         if (length) {
2305                 if (backwards) {
2306                         d->cursor_.pos() += length;
2307                         d->cursor_.setSelection(d->cursor_, -length);
2308                 } else
2309                         d->cursor_.setSelection(d->cursor_, length);
2310         }
2311         // Ensure a redraw happens in any case because the new selection could
2312         // possibly be on the same screen as the previous selection.
2313         processUpdateFlags(Update::Force | Update::FitCursor);
2314 }
2315
2316
2317 Cursor & BufferView::cursor()
2318 {
2319         return d->cursor_;
2320 }
2321
2322
2323 Cursor const & BufferView::cursor() const
2324 {
2325         return d->cursor_;
2326 }
2327
2328
2329 pit_type BufferView::anchor_ref() const
2330 {
2331         return d->anchor_pit_;
2332 }
2333
2334
2335 bool BufferView::singleParUpdate()
2336 {
2337         Text & buftext = buffer_.text();
2338         pit_type const bottom_pit = d->cursor_.bottom().pit();
2339         TextMetrics & tm = textMetrics(&buftext);
2340         int old_height = tm.parMetrics(bottom_pit).height();
2341
2342         // make sure inline completion pointer is ok
2343         if (d->inlineCompletionPos_.fixIfBroken())
2344                 d->inlineCompletionPos_ = DocIterator();
2345
2346         // In Single Paragraph mode, rebreak only
2347         // the (main text, not inset!) paragraph containing the cursor.
2348         // (if this paragraph contains insets etc., rebreaking will
2349         // recursively descend)
2350         tm.redoParagraph(bottom_pit);
2351         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
2352         if (pm.height() != old_height)
2353                 // Paragraph height has changed so we cannot proceed to
2354                 // the singlePar optimisation.
2355                 return false;
2356
2357         d->update_strategy_ = SingleParUpdate;
2358
2359         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
2360                 << " y2: " << pm.position() + pm.descent()
2361                 << " pit: " << bottom_pit
2362                 << " singlepar: 1");
2363         return true;
2364 }
2365
2366
2367 void BufferView::updateMetrics()
2368 {
2369         if (height_ == 0 || width_ == 0)
2370                 return;
2371
2372         Text & buftext = buffer_.text();
2373         pit_type const npit = int(buftext.paragraphs().size());
2374
2375         // Clear out the position cache in case of full screen redraw,
2376         d->coord_cache_.clear();
2377
2378         // Clear out paragraph metrics to avoid having invalid metrics
2379         // in the cache from paragraphs not relayouted below
2380         // The complete text metrics will be redone.
2381         d->text_metrics_.clear();
2382
2383         TextMetrics & tm = textMetrics(&buftext);
2384
2385         // make sure inline completion pointer is ok
2386         if (d->inlineCompletionPos_.fixIfBroken())
2387                 d->inlineCompletionPos_ = DocIterator();
2388
2389         if (d->anchor_pit_ >= npit)
2390                 // The anchor pit must have been deleted...
2391                 d->anchor_pit_ = npit - 1;
2392
2393         // Rebreak anchor paragraph.
2394         tm.redoParagraph(d->anchor_pit_);
2395         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
2396
2397         // position anchor
2398         if (d->anchor_pit_ == 0) {
2399                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
2400
2401                 // Complete buffer visible? Then it's easy.
2402                 if (scrollRange == 0)
2403                         d->anchor_ypos_ = anchor_pm.ascent();
2404
2405                 // FIXME: Some clever handling needed to show
2406                 // the _first_ paragraph up to the top if the cursor is
2407                 // in the first line.
2408         }
2409         anchor_pm.setPosition(d->anchor_ypos_);
2410
2411         LYXERR(Debug::PAINTING, "metrics: "
2412                 << " anchor pit = " << d->anchor_pit_
2413                 << " anchor ypos = " << d->anchor_ypos_);
2414
2415         // Redo paragraphs above anchor if necessary.
2416         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
2417         // We are now just above the anchor paragraph.
2418         pit_type pit1 = d->anchor_pit_ - 1;
2419         for (; pit1 >= 0 && y1 >= 0; --pit1) {
2420                 tm.redoParagraph(pit1);
2421                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
2422                 y1 -= pm.descent();
2423                 // Save the paragraph position in the cache.
2424                 pm.setPosition(y1);
2425                 y1 -= pm.ascent();
2426         }
2427
2428         // Redo paragraphs below the anchor if necessary.
2429         int y2 = d->anchor_ypos_ + anchor_pm.descent();
2430         // We are now just below the anchor paragraph.
2431         pit_type pit2 = d->anchor_pit_ + 1;
2432         for (; pit2 < npit && y2 <= height_; ++pit2) {
2433                 tm.redoParagraph(pit2);
2434                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
2435                 y2 += pm.ascent();
2436                 // Save the paragraph position in the cache.
2437                 pm.setPosition(y2);
2438                 y2 += pm.descent();
2439         }
2440
2441         LYXERR(Debug::PAINTING, "Metrics: "
2442                 << " anchor pit = " << d->anchor_pit_
2443                 << " anchor ypos = " << d->anchor_ypos_
2444                 << " y1 = " << y1
2445                 << " y2 = " << y2
2446                 << " pit1 = " << pit1
2447                 << " pit2 = " << pit2);
2448
2449         d->update_strategy_ = FullScreenUpdate;
2450
2451         if (lyxerr.debugging(Debug::WORKAREA)) {
2452                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
2453                 d->coord_cache_.dump();
2454         }
2455 }
2456
2457
2458 void BufferView::insertLyXFile(FileName const & fname)
2459 {
2460         LASSERT(d->cursor_.inTexted(), /**/);
2461
2462         // Get absolute path of file and add ".lyx"
2463         // to the filename if necessary
2464         FileName filename = fileSearch(string(), fname.absFileName(), "lyx");
2465
2466         docstring const disp_fn = makeDisplayPath(filename.absFileName());
2467         // emit message signal.
2468         message(bformat(_("Inserting document %1$s..."), disp_fn));
2469
2470         docstring res;
2471         Buffer buf("", false);
2472         if (buf.loadLyXFile(filename)) {
2473                 ErrorList & el = buffer_.errorList("Parse");
2474                 // Copy the inserted document error list into the current buffer one.
2475                 el = buf.errorList("Parse");
2476                 buffer_.undo().recordUndo(d->cursor_);
2477                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
2478                                              buf.params().documentClassPtr(), el);
2479                 res = _("Document %1$s inserted.");
2480         } else {
2481                 res = _("Could not insert document %1$s");
2482         }
2483
2484         buffer_.changed(true);
2485         // emit message signal.
2486         message(bformat(res, disp_fn));
2487         buffer_.errors("Parse");
2488 }
2489
2490
2491 Point BufferView::coordOffset(DocIterator const & dit) const
2492 {
2493         int x = 0;
2494         int y = 0;
2495         int lastw = 0;
2496
2497         // Addup contribution of nested insets, from inside to outside,
2498         // keeping the outer paragraph for a special handling below
2499         for (size_t i = dit.depth() - 1; i >= 1; --i) {
2500                 CursorSlice const & sl = dit[i];
2501                 int xx = 0;
2502                 int yy = 0;
2503
2504                 // get relative position inside sl.inset()
2505                 sl.inset().cursorPos(*this, sl, dit.boundary() && (i + 1 == dit.depth()), xx, yy);
2506
2507                 // Make relative position inside of the edited inset relative to sl.inset()
2508                 x += xx;
2509                 y += yy;
2510
2511                 // In case of an RTL inset, the edited inset will be positioned to the left
2512                 // of xx:yy
2513                 if (sl.text()) {
2514                         bool boundary_i = dit.boundary() && i + 1 == dit.depth();
2515                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
2516                         if (rtl)
2517                                 x -= lastw;
2518                 }
2519
2520                 // remember width for the case that sl.inset() is positioned in an RTL inset
2521                 if (i && dit[i - 1].text()) {
2522                         // If this Inset is inside a Text Inset, retrieve the Dimension
2523                         // from the containing text instead of using Inset::dimension() which
2524                         // might not be implemented.
2525                         // FIXME (Abdel 23/09/2007): this is a bit messy because of the
2526                         // elimination of Inset::dim_ cache. This coordOffset() method needs
2527                         // to be rewritten in light of the new design.
2528                         Dimension const & dim = parMetrics(dit[i - 1].text(),
2529                                 dit[i - 1].pit()).insetDimension(&sl.inset());
2530                         lastw = dim.wid;
2531                 } else {
2532                         Dimension const dim = sl.inset().dimension(*this);
2533                         lastw = dim.wid;
2534                 }
2535
2536                 //lyxerr << "Cursor::getPos, i: "
2537                 // << i << " x: " << xx << " y: " << y << endl;
2538         }
2539
2540         // Add contribution of initial rows of outermost paragraph
2541         CursorSlice const & sl = dit[0];
2542         TextMetrics const & tm = textMetrics(sl.text());
2543         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
2544         LASSERT(!pm.rows().empty(), /**/);
2545         y -= pm.rows()[0].ascent();
2546 #if 1
2547         // FIXME: document this mess
2548         size_t rend;
2549         if (sl.pos() > 0 && dit.depth() == 1) {
2550                 int pos = sl.pos();
2551                 if (pos && dit.boundary())
2552                         --pos;
2553 //              lyxerr << "coordOffset: boundary:" << dit.boundary() << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
2554                 rend = pm.pos2row(pos);
2555         } else
2556                 rend = pm.pos2row(sl.pos());
2557 #else
2558         size_t rend = pm.pos2row(sl.pos());
2559 #endif
2560         for (size_t rit = 0; rit != rend; ++rit)
2561                 y += pm.rows()[rit].height();
2562         y += pm.rows()[rend].ascent();
2563
2564         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2565
2566         // Make relative position from the nested inset now bufferview absolute.
2567         int xx = bottom_tm.cursorX(dit.bottom(), dit.boundary() && dit.depth() == 1);
2568         x += xx;
2569
2570         // In the RTL case place the nested inset at the left of the cursor in
2571         // the outer paragraph
2572         bool boundary_1 = dit.boundary() && 1 == dit.depth();
2573         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2574         if (rtl)
2575                 x -= lastw;
2576
2577         return Point(x, y);
2578 }
2579
2580
2581 Point BufferView::getPos(DocIterator const & dit) const
2582 {
2583         if (!paragraphVisible(dit))
2584                 return Point(-1, -1);
2585
2586         CursorSlice const & bot = dit.bottom();
2587         TextMetrics const & tm = textMetrics(bot.text());
2588
2589         // offset from outer paragraph
2590         Point p = coordOffset(dit);
2591         p.y_ += tm.parMetrics(bot.pit()).position();
2592         return p;
2593 }
2594
2595
2596 bool BufferView::paragraphVisible(DocIterator const & dit) const
2597 {
2598         CursorSlice const & bot = dit.bottom();
2599         TextMetrics const & tm = textMetrics(bot.text());
2600
2601         return tm.contains(bot.pit());
2602 }
2603
2604
2605 void BufferView::cursorPosAndHeight(Point & p, int & h) const
2606 {
2607         Cursor const & cur = cursor();
2608         Font const font = cur.getFont();
2609         frontend::FontMetrics const & fm = theFontMetrics(font);
2610         int const asc = fm.maxAscent();
2611         int const des = fm.maxDescent();
2612         h = asc + des;
2613         p = getPos(cur);
2614         p.y_ -= asc;
2615 }
2616
2617
2618 bool BufferView::cursorInView(Point const & p, int h) const
2619 {
2620         Cursor const & cur = cursor();
2621         // does the cursor touch the screen ?
2622         if (p.y_ + h < 0 || p.y_ >= workHeight() || !paragraphVisible(cur))
2623                 return false;
2624         return true;
2625 }
2626
2627
2628 void BufferView::draw(frontend::Painter & pain)
2629 {
2630         if (height_ == 0 || width_ == 0)
2631                 return;
2632         LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
2633
2634         Text & text = buffer_.text();
2635         TextMetrics const & tm = d->text_metrics_[&text];
2636         int const y = tm.first().second->position();
2637         PainterInfo pi(this, pain);
2638
2639         switch (d->update_strategy_) {
2640
2641         case NoScreenUpdate:
2642                 // If no screen painting is actually needed, only some the different
2643                 // coordinates of insets and paragraphs needs to be updated.
2644                 pi.full_repaint = true;
2645                 pi.pain.setDrawingEnabled(false);
2646                 tm.draw(pi, 0, y);
2647                 break;
2648
2649         case SingleParUpdate:
2650                 pi.full_repaint = false;
2651                 // In general, only the current row of the outermost paragraph
2652                 // will be redrawn. Particular cases where selection spans
2653                 // multiple paragraph are correctly detected in TextMetrics.
2654                 tm.draw(pi, 0, y);
2655                 break;
2656
2657         case DecorationUpdate:
2658                 // FIXME: We should also distinguish DecorationUpdate to avoid text
2659                 // drawing if possible. This is not possible to do easily right now
2660                 // because of the single backing pixmap.
2661
2662         case FullScreenUpdate:
2663                 // The whole screen, including insets, will be refreshed.
2664                 pi.full_repaint = true;
2665
2666                 // Clear background.
2667                 pain.fillRectangle(0, 0, width_, height_,
2668                         pi.backgroundColor(&buffer_.inset()));
2669
2670                 // Draw everything.
2671                 tm.draw(pi, 0, y);
2672
2673                 // and possibly grey out below
2674                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2675                 int const y2 = lastpm.second->position() + lastpm.second->descent();
2676
2677                 if (y2 < height_) {
2678                         Color color = buffer().isInternal()
2679                                 ? Color_background : Color_bottomarea;
2680                         pain.fillRectangle(0, y2, width_, height_ - y2, color);
2681                 }
2682                 break;
2683         }
2684         LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
2685
2686         // The scrollbar needs an update.
2687         updateScrollbar();
2688
2689         // Normalize anchor for next time
2690         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
2691         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2692         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
2693                 ParagraphMetrics const & pm = tm.parMetrics(pit);
2694                 if (pm.position() + pm.descent() > 0) {
2695                         d->anchor_pit_ = pit;
2696                         d->anchor_ypos_ = pm.position();
2697                         break;
2698                 }
2699         }
2700         LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
2701                 << "  anchor ypos = " << d->anchor_ypos_);
2702 }
2703
2704
2705 void BufferView::message(docstring const & msg)
2706 {
2707         if (d->gui_)
2708                 d->gui_->message(msg);
2709 }
2710
2711
2712 void BufferView::showDialog(string const & name)
2713 {
2714         if (d->gui_)
2715                 d->gui_->showDialog(name, string());
2716 }
2717
2718
2719 void BufferView::showDialog(string const & name,
2720         string const & data, Inset * inset)
2721 {
2722         if (d->gui_)
2723                 d->gui_->showDialog(name, data, inset);
2724 }
2725
2726
2727 void BufferView::updateDialog(string const & name, string const & data)
2728 {
2729         if (d->gui_)
2730                 d->gui_->updateDialog(name, data);
2731 }
2732
2733
2734 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
2735 {
2736         d->gui_ = gui;
2737 }
2738
2739
2740 // FIXME: Move this out of BufferView again
2741 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
2742 {
2743         if (!fname.isReadableFile()) {
2744                 docstring const error = from_ascii(strerror(errno));
2745                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
2746                 docstring const text =
2747                   bformat(_("Could not read the specified document\n"
2748                             "%1$s\ndue to the error: %2$s"), file, error);
2749                 Alert::error(_("Could not read file"), text);
2750                 return docstring();
2751         }
2752
2753         if (!fname.isReadableFile()) {
2754                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
2755                 docstring const text =
2756                   bformat(_("%1$s\n is not readable."), file);
2757                 Alert::error(_("Could not open file"), text);
2758                 return docstring();
2759         }
2760
2761         // FIXME UNICODE: We don't know the encoding of the file
2762         docstring file_content = fname.fileContents("UTF-8");
2763         if (file_content.empty()) {
2764                 Alert::error(_("Reading not UTF-8 encoded file"),
2765                              _("The file is not UTF-8 encoded.\n"
2766                                "It will be read as local 8Bit-encoded.\n"
2767                                "If this does not give the correct result\n"
2768                                "then please change the encoding of the file\n"
2769                                "to UTF-8 with a program other than LyX.\n"));
2770                 file_content = fname.fileContents("local8bit");
2771         }
2772
2773         return normalize_c(file_content);
2774 }
2775
2776
2777 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
2778 {
2779         docstring const tmpstr = contentsOfPlaintextFile(f);
2780
2781         if (tmpstr.empty())
2782                 return;
2783
2784         Cursor & cur = cursor();
2785         cap::replaceSelection(cur);
2786         buffer_.undo().recordUndo(cur);
2787         if (asParagraph)
2788                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr, cur.current_font);
2789         else
2790                 cur.innerText()->insertStringAsLines(cur, tmpstr, cur.current_font);
2791
2792         buffer_.changed(true);
2793 }
2794
2795
2796 docstring const & BufferView::inlineCompletion() const
2797 {
2798         return d->inlineCompletion_;
2799 }
2800
2801
2802 size_t const & BufferView::inlineCompletionUniqueChars() const
2803 {
2804         return d->inlineCompletionUniqueChars_;
2805 }
2806
2807
2808 DocIterator const & BufferView::inlineCompletionPos() const
2809 {
2810         return d->inlineCompletionPos_;
2811 }
2812
2813
2814 bool samePar(DocIterator const & a, DocIterator const & b)
2815 {
2816         if (a.empty() && b.empty())
2817                 return true;
2818         if (a.empty() || b.empty())
2819                 return false;
2820         if (a.depth() != b.depth())
2821                 return false;
2822         return &a.innerParagraph() == &b.innerParagraph();
2823 }
2824
2825
2826 void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
2827         docstring const & completion, size_t uniqueChars)
2828 {
2829         uniqueChars = min(completion.size(), uniqueChars);
2830         bool changed = d->inlineCompletion_ != completion
2831                 || d->inlineCompletionUniqueChars_ != uniqueChars;
2832         bool singlePar = true;
2833         d->inlineCompletion_ = completion;
2834         d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
2835
2836         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
2837
2838         // at new position?
2839         DocIterator const & old = d->inlineCompletionPos_;
2840         if (old != pos) {
2841                 //lyxerr << "inlineCompletionPos changed" << std::endl;
2842                 // old or pos are in another paragraph?
2843                 if ((!samePar(cur, pos) && !pos.empty())
2844                     || (!samePar(cur, old) && !old.empty())) {
2845                         singlePar = false;
2846                         //lyxerr << "different paragraph" << std::endl;
2847                 }
2848                 d->inlineCompletionPos_ = pos;
2849         }
2850
2851         // set update flags
2852         if (changed) {
2853                 if (singlePar && !(cur.result().update() & Update::Force))
2854                         cur.screenUpdateFlags(cur.result().update() | Update::SinglePar);
2855                 else
2856                         cur.screenUpdateFlags(cur.result().update() | Update::Force);
2857         }
2858 }
2859
2860 } // namespace lyx