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                 // since this shortcircuits, the second call is made only if
1243                 // the first fails
1244                 bool const success =
1245                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1246                         LayoutFileList::get().load(argument, buffer_.filePath());
1247                 if (!success) {
1248                         docstring s = bformat(_("The document class `%1$s' "
1249                                                  "could not be loaded."), from_utf8(argument));
1250                         frontend::Alert::error(_("Could not load class"), s);
1251                         break;
1252                 }
1253
1254                 LayoutFile const * old_layout = buffer_.params().baseClass();
1255                 LayoutFile const * new_layout = &(LayoutFileList::get()[argument]);
1256
1257                 if (old_layout == new_layout)
1258                         // nothing to do
1259                         break;
1260
1261                 // Save the old, possibly modular, layout for use in conversion.
1262                 DocumentClass const * const oldDocClass =
1263                         buffer_.params().documentClassPtr();
1264                 cur.recordUndoFullDocument();
1265                 buffer_.params().setBaseClass(argument);
1266                 buffer_.params().makeDocumentClass();
1267                 updateDocumentClass(oldDocClass);
1268                 dr.update(Update::Force | Update::FitCursor);
1269                 dr.forceBufferUpdate();
1270                 break;
1271         }
1272
1273         case LFUN_TEXTCLASS_LOAD: {
1274                 // since this shortcircuits, the second call is made only if
1275                 // the first fails
1276                 bool const success =
1277                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1278                         LayoutFileList::get().load(argument, buffer_.filePath());
1279                 if (!success) {
1280                         docstring s = bformat(_("The document class `%1$s' "
1281                                                  "could not be loaded."), from_utf8(argument));
1282                         frontend::Alert::error(_("Could not load class"), s);
1283                 }
1284                 break;
1285         }
1286
1287         case LFUN_LAYOUT_RELOAD: {
1288                 DocumentClass const * const oldClass = buffer_.params().documentClassPtr();
1289                 LayoutFileIndex bc = buffer_.params().baseClassID();
1290                 LayoutFileList::get().reset(bc);
1291                 buffer_.params().setBaseClass(bc);
1292                 buffer_.params().makeDocumentClass();
1293                 updateDocumentClass(oldClass);
1294                 dr.update(Update::Force | Update::FitCursor);
1295                 dr.forceBufferUpdate();
1296                 break;
1297         }
1298
1299         case LFUN_UNDO:
1300                 dr.setMessage(_("Undo"));
1301                 cur.clearSelection();
1302                 if (!cur.textUndo())
1303                         dr.setMessage(_("No further undo information"));
1304                 else
1305                         dr.update(Update::Force | Update::FitCursor);
1306                 dr.forceBufferUpdate();
1307                 break;
1308
1309         case LFUN_REDO:
1310                 dr.setMessage(_("Redo"));
1311                 cur.clearSelection();
1312                 if (!cur.textRedo())
1313                         dr.setMessage(_("No further redo information"));
1314                 else
1315                         dr.update(Update::Force | Update::FitCursor);
1316                 dr.forceBufferUpdate();
1317                 break;
1318
1319         case LFUN_FONT_STATE:
1320                 dr.setMessage(cur.currentState());
1321                 break;
1322
1323         case LFUN_BOOKMARK_SAVE:
1324                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1325                 break;
1326
1327         case LFUN_LABEL_GOTO: {
1328                 docstring label = cmd.argument();
1329                 if (label.empty()) {
1330                         InsetRef * inset =
1331                                 getInsetByCode<InsetRef>(cur, REF_CODE);
1332                         if (inset) {
1333                                 label = inset->getParam("reference");
1334                                 // persistent=false: use temp_bookmark
1335                                 saveBookmark(0);
1336                         }
1337                 }
1338                 if (!label.empty())
1339                         gotoLabel(label);
1340                 break;
1341         }
1342
1343         case LFUN_PARAGRAPH_GOTO: {
1344                 int const id = convert<int>(cmd.getArg(0));
1345                 int const pos = convert<int>(cmd.getArg(1));
1346                 int i = 0;
1347                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1348                         b = theBufferList().next(b)) {
1349
1350                         DocIterator dit = b->getParFromID(id);
1351                         if (dit.atEnd()) {
1352                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1353                                 ++i;
1354                                 continue;
1355                         }
1356                         LYXERR(Debug::INFO, "Paragraph " << dit.paragraph().id()
1357                                 << " found in buffer `"
1358                                 << b->absFileName() << "'.");
1359
1360                         if (b == &buffer_) {
1361                                 // Set the cursor
1362                                 dit.pos() = pos;
1363                                 setCursor(dit);
1364                                 dr.update(Update::Force | Update::FitCursor);
1365                         } else {
1366                                 // Switch to other buffer view and resend cmd
1367                                 lyx::dispatch(FuncRequest(
1368                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1369                                 lyx::dispatch(cmd);
1370                         }
1371                         break;
1372                 }
1373                 break;
1374         }
1375
1376         case LFUN_NOTE_NEXT:
1377                 gotoInset(this, NOTE_CODE, false);
1378                 break;
1379
1380         case LFUN_REFERENCE_NEXT: {
1381                 vector<InsetCode> tmp;
1382                 tmp.push_back(LABEL_CODE);
1383                 tmp.push_back(REF_CODE);
1384                 gotoInset(this, tmp, true);
1385                 break;
1386         }
1387
1388         case LFUN_CHANGES_TRACK:
1389                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
1390                 break;
1391
1392         case LFUN_CHANGES_OUTPUT:
1393                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
1394                 if (buffer_.params().outputChanges) {
1395                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
1396                         bool xcolorulem = LaTeXFeatures::isAvailable("ulem") &&
1397                                           LaTeXFeatures::isAvailable("xcolor");
1398
1399                         if (!dvipost && !xcolorulem) {
1400                                 Alert::warning(_("Changes not shown in LaTeX output"),
1401                                                _("Changes will not be highlighted in LaTeX output, "
1402                                                  "because neither dvipost nor xcolor/ulem are installed.\n"
1403                                                  "Please install these packages or redefine "
1404                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1405                         } else if (!xcolorulem) {
1406                                 Alert::warning(_("Changes not shown in LaTeX output"),
1407                                                _("Changes will not be highlighted in LaTeX output "
1408                                                  "when using pdflatex, because xcolor and ulem are not installed.\n"
1409                                                  "Please install both packages or redefine "
1410                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1411                         }
1412                 }
1413                 break;
1414
1415         case LFUN_CHANGE_NEXT:
1416                 findNextChange(this);
1417                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1418                 dr.update(Update::Force | Update::FitCursor);
1419                 break;
1420
1421         case LFUN_CHANGE_PREVIOUS:
1422                 findPreviousChange(this);
1423                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1424                 dr.update(Update::Force | Update::FitCursor);
1425                 break;
1426
1427         case LFUN_CHANGES_MERGE:
1428                 if (findNextChange(this) || findPreviousChange(this)) {
1429                         dr.update(Update::Force | Update::FitCursor);
1430                         dr.forceBufferUpdate();
1431                         showDialog("changes");
1432                 }
1433                 break;
1434
1435         case LFUN_ALL_CHANGES_ACCEPT:
1436                 // select complete document
1437                 cur.reset();
1438                 cur.selHandle(true);
1439                 buffer_.text().cursorBottom(cur);
1440                 // accept everything in a single step to support atomic undo
1441                 buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
1442                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1443                 dr.update(Update::Force | Update::FitCursor);
1444                 dr.forceBufferUpdate();
1445                 break;
1446
1447         case LFUN_ALL_CHANGES_REJECT:
1448                 // select complete document
1449                 cur.reset();
1450                 cur.selHandle(true);
1451                 buffer_.text().cursorBottom(cur);
1452                 // reject everything in a single step to support atomic undo
1453                 // Note: reject does not work recursively; the user may have to repeat the operation
1454                 buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
1455                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1456                 dr.update(Update::Force | Update::FitCursor);
1457                 dr.forceBufferUpdate();
1458                 break;
1459
1460         case LFUN_WORD_FIND_FORWARD:
1461         case LFUN_WORD_FIND_BACKWARD: {
1462                 static docstring last_search;
1463                 docstring searched_string;
1464
1465                 if (!cmd.argument().empty()) {
1466                         last_search = cmd.argument();
1467                         searched_string = cmd.argument();
1468                 } else {
1469                         searched_string = last_search;
1470                 }
1471
1472                 if (searched_string.empty())
1473                         break;
1474
1475                 bool const fw = act == LFUN_WORD_FIND_FORWARD;
1476                 docstring const data =
1477                         find2string(searched_string, true, false, fw);
1478                 find(this, FuncRequest(LFUN_WORD_FIND, data));
1479                 break;
1480         }
1481
1482         case LFUN_WORD_FIND: {
1483                 FuncRequest req = cmd;
1484                 if (cmd.argument().empty() && !d->search_request_cache_.argument().empty())
1485                         req = d->search_request_cache_;
1486                 if (req.argument().empty()) {
1487                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
1488                         break;
1489                 }
1490                 if (find(this, req))
1491                         showCursor();
1492                 else
1493                         message(_("String not found!"));
1494                 d->search_request_cache_ = req;
1495                 break;
1496         }
1497
1498         case LFUN_WORD_REPLACE: {
1499                 bool has_deleted = false;
1500                 if (cur.selection()) {
1501                         DocIterator beg = cur.selectionBegin();
1502                         DocIterator end = cur.selectionEnd();
1503                         if (beg.pit() == end.pit()) {
1504                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1505                                         if (!cur.inMathed()
1506                                             && cur.paragraph().isDeleted(p))
1507                                                 has_deleted = true;
1508                                 }
1509                         }
1510                 }
1511                 replace(this, cmd, has_deleted);
1512                 dr.forceBufferUpdate();
1513                 break;
1514         }
1515
1516         case LFUN_WORD_FINDADV: {
1517                 FindAndReplaceOptions opt;
1518                 istringstream iss(to_utf8(cmd.argument()));
1519                 iss >> opt;
1520                 if (findAdv(this, opt))
1521                         cur.dispatched();
1522                 else
1523                         cur.undispatched();
1524                 break;
1525         }
1526
1527         case LFUN_MARK_OFF:
1528                 cur.clearSelection();
1529                 dr.setMessage(from_utf8(N_("Mark off")));
1530                 break;
1531
1532         case LFUN_MARK_ON:
1533                 cur.clearSelection();
1534                 cur.setMark(true);
1535                 dr.setMessage(from_utf8(N_("Mark on")));
1536                 break;
1537
1538         case LFUN_MARK_TOGGLE:
1539                 cur.setSelection(false);
1540                 if (cur.mark()) {
1541                         cur.setMark(false);
1542                         dr.setMessage(from_utf8(N_("Mark removed")));
1543                 } else {
1544                         cur.setMark(true);
1545                         dr.setMessage(from_utf8(N_("Mark set")));
1546                 }
1547                 cur.resetAnchor();
1548                 break;
1549
1550         case LFUN_SCREEN_SHOW_CURSOR:
1551                 showCursor();
1552                 break;
1553
1554         case LFUN_SCREEN_RECENTER:
1555                 recenter();
1556                 break;
1557
1558         case LFUN_BIBTEX_DATABASE_ADD: {
1559                 Cursor tmpcur = cur;
1560                 findInset(tmpcur, BIBTEX_CODE, false);
1561                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1562                                                 BIBTEX_CODE);
1563                 if (inset) {
1564                         if (inset->addDatabase(cmd.argument()))
1565                                 buffer_.updateBibfilesCache();
1566                 }
1567                 break;
1568         }
1569
1570         case LFUN_BIBTEX_DATABASE_DEL: {
1571                 Cursor tmpcur = cur;
1572                 findInset(tmpcur, BIBTEX_CODE, false);
1573                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1574                                                 BIBTEX_CODE);
1575                 if (inset) {
1576                         if (inset->delDatabase(cmd.argument()))
1577                                 buffer_.updateBibfilesCache();
1578                 }
1579                 break;
1580         }
1581
1582         case LFUN_STATISTICS: {
1583                 DocIterator from, to;
1584                 if (cur.selection()) {
1585                         from = cur.selectionBegin();
1586                         to = cur.selectionEnd();
1587                 } else {
1588                         from = doc_iterator_begin(&buffer_);
1589                         to = doc_iterator_end(&buffer_);
1590                 }
1591                 int const words = countWords(from, to);
1592                 int const chars = countChars(from, to, false);
1593                 int const chars_blanks = countChars(from, to, true);
1594                 docstring message;
1595                 if (cur.selection())
1596                         message = _("Statistics for the selection:");
1597                 else
1598                         message = _("Statistics for the document:");
1599                 message += "\n\n";
1600                 if (words != 1)
1601                         message += bformat(_("%1$d words"), words);
1602                 else
1603                         message += _("One word");
1604                 message += "\n";
1605                 if (chars_blanks != 1)
1606                         message += bformat(_("%1$d characters (including blanks)"),
1607                                           chars_blanks);
1608                 else
1609                         message += _("One character (including blanks)");
1610                 message += "\n";
1611                 if (chars != 1)
1612                         message += bformat(_("%1$d characters (excluding blanks)"),
1613                                           chars);
1614                 else
1615                         message += _("One character (excluding blanks)");
1616
1617                 Alert::information(_("Statistics"), message);
1618         }
1619                 break;
1620
1621         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1622                 // turn compression on/off
1623                 buffer_.params().compressed = !buffer_.params().compressed;
1624                 break;
1625
1626         case LFUN_BUFFER_TOGGLE_OUTPUT_SYNC:
1627                 buffer_.params().output_sync = !buffer_.params().output_sync;
1628                 break;
1629
1630         case LFUN_SCREEN_UP:
1631         case LFUN_SCREEN_DOWN: {
1632                 Point p = getPos(cur);
1633                 // This code has been commented out to enable to scroll down a
1634                 // document, even if there are large insets in it (see bug #5465).
1635                 /*if (p.y_ < 0 || p.y_ > height_) {
1636                         // The cursor is off-screen so recenter before proceeding.
1637                         showCursor();
1638                         p = getPos(cur);
1639                 }*/
1640                 int const scrolled = scroll(act == LFUN_SCREEN_UP
1641                         ? -height_ : height_);
1642                 if (act == LFUN_SCREEN_UP && scrolled > -height_)
1643                         p = Point(0, 0);
1644                 if (act == LFUN_SCREEN_DOWN && scrolled < height_)
1645                         p = Point(width_, height_);
1646                 Cursor old = cur;
1647                 bool const in_texted = cur.inTexted();
1648                 cur.reset();
1649                 buffer_.changed(true);
1650                 updateHoveredInset();
1651
1652                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
1653                         true, act == LFUN_SCREEN_UP);
1654                 //FIXME: what to do with cur.x_target()?
1655                 bool update = in_texted && cur.bv().checkDepm(cur, old);
1656                 cur.finishUndo();
1657                 if (update) {
1658                         dr.update(Update::Force | Update::FitCursor);
1659                         dr.forceBufferUpdate();
1660                 }
1661                 break;
1662         }
1663
1664         case LFUN_SCROLL:
1665                 lfunScroll(cmd);
1666                 dr.forceBufferUpdate();
1667                 break;
1668
1669         case LFUN_SCREEN_UP_SELECT: {
1670                 cur.selHandle(true);
1671                 if (isTopScreen()) {
1672                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1673                         cur.finishUndo();
1674                         break;
1675                 }
1676                 int y = getPos(cur).y_;
1677                 int const ymin = y - height_ + defaultRowHeight();
1678                 while (y > ymin && cur.up())
1679                         y = getPos(cur).y_;
1680
1681                 cur.finishUndo();
1682                 dr.update(Update::SinglePar | Update::FitCursor);
1683                 break;
1684         }
1685
1686         case LFUN_SCREEN_DOWN_SELECT: {
1687                 cur.selHandle(true);
1688                 if (isBottomScreen()) {
1689                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1690                         cur.finishUndo();
1691                         break;
1692                 }
1693                 int y = getPos(cur).y_;
1694                 int const ymax = y + height_ - defaultRowHeight();
1695                 while (y < ymax && cur.down())
1696                         y = getPos(cur).y_;
1697
1698                 cur.finishUndo();
1699                 dr.update(Update::SinglePar | Update::FitCursor);
1700                 break;
1701         }
1702
1703
1704         // This would be in Buffer class if only Cursor did not
1705         // require a bufferview
1706         case LFUN_INSET_FORALL: {
1707                 docstring const name = from_utf8(cmd.getArg(0));
1708                 string const commandstr = cmd.getLongArg(1);
1709                 FuncRequest const fr = lyxaction.lookupFunc(commandstr);
1710
1711                 // an arbitrary number to limit number of iterations
1712                 const int max_iter = 10000;
1713                 int iterations = 0;
1714                 Cursor & cur = d->cursor_;
1715                 Cursor const savecur = cur;
1716                 cur.reset();
1717                 if (!cur.nextInset())
1718                         cur.forwardInset();
1719                 cur.beginUndoGroup();
1720                 while(cur && iterations < max_iter) {
1721                         Inset * ins = cur.nextInset();
1722                         if (!ins)
1723                                 break;
1724                         docstring insname = ins->name();
1725                         while (!insname.empty()) {
1726                                 if (insname == name || name == from_utf8("*")) {
1727                                         cur.recordUndo();
1728                                         lyx::dispatch(fr, dr);
1729                                         ++iterations;
1730                                         break;
1731                                 }
1732                                 size_t const i = insname.rfind(':');
1733                                 if (i == string::npos)
1734                                         break;
1735                                 insname = insname.substr(0, i);
1736                         }
1737                         cur.forwardInset();
1738                 }
1739                 cur.endUndoGroup();
1740                 cur = savecur;
1741                 cur.fixIfBroken();
1742                 dr.update(Update::Force);
1743                 dr.forceBufferUpdate();
1744
1745                 if (iterations >= max_iter) {
1746                         dr.setError(true);
1747                         dr.setMessage(bformat(_("`inset-forall' interrupted because number of actions is larger than %1$d"), max_iter));
1748                 } else
1749                         dr.setMessage(bformat(_("Applied \"%1$s\" to %2$d insets"), from_utf8(commandstr), iterations));
1750                 break;
1751         }
1752
1753
1754         case LFUN_BRANCH_ADD_INSERT: {
1755                 docstring branch_name = from_utf8(cmd.getArg(0));
1756                 if (branch_name.empty())
1757                         if (!Alert::askForText(branch_name, _("Branch name")) ||
1758                                                 branch_name.empty())
1759                                 break;
1760
1761                 DispatchResult drtmp;
1762                 buffer_.dispatch(FuncRequest(LFUN_BRANCH_ADD, branch_name), drtmp);
1763                 if (drtmp.error()) {
1764                         Alert::warning(_("Branch already exists"), drtmp.message());
1765                         break;
1766                 }
1767                 BranchList & branch_list = buffer_.params().branchlist();
1768                 vector<docstring> const branches =
1769                         getVectorFromString(branch_name, branch_list.separator());
1770                 for (vector<docstring>::const_iterator it = branches.begin();
1771                      it != branches.end(); ++it) {
1772                         branch_name = *it;
1773                         lyx::dispatch(FuncRequest(LFUN_BRANCH_INSERT, branch_name));
1774                 }
1775                 break;
1776         }
1777
1778         case LFUN_KEYMAP_OFF:
1779                 getIntl().keyMapOn(false);
1780                 break;
1781
1782         case LFUN_KEYMAP_PRIMARY:
1783                 getIntl().keyMapPrim();
1784                 break;
1785
1786         case LFUN_KEYMAP_SECONDARY:
1787                 getIntl().keyMapSec();
1788                 break;
1789
1790         case LFUN_KEYMAP_TOGGLE:
1791                 getIntl().toggleKeyMap();
1792                 break;
1793
1794         case LFUN_DIALOG_SHOW_NEW_INSET: {
1795                 string const name = cmd.getArg(0);
1796                 string data = trim(to_utf8(cmd.argument()).substr(name.size()));
1797                 if (decodeInsetParam(name, data, buffer_))
1798                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, name + " " + data));
1799                 else
1800                         lyxerr << "Inset type '" << name <<
1801                         "' not recognized in LFUN_DIALOG_SHOW_NEW_INSET" <<  endl;
1802                 break;
1803         }
1804
1805         case LFUN_CITATION_INSERT: {
1806                 if (argument.empty()) {
1807                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW_NEW_INSET, "citation"));
1808                         break;
1809                 }
1810                 // we can have one optional argument, delimited by '|'
1811                 // citation-insert <key>|<text_before>
1812                 // this should be enhanced to also support text_after
1813                 // and citation style
1814                 string arg = argument;
1815                 string opt1;
1816                 if (contains(argument, "|")) {
1817                         arg = token(argument, '|', 0);
1818                         opt1 = token(argument, '|', 1);
1819                 }
1820                 InsetCommandParams icp(CITE_CODE);
1821                 icp["key"] = from_utf8(arg);
1822                 if (!opt1.empty())
1823                         icp["before"] = from_utf8(opt1);
1824                 string icstr = InsetCommand::params2string("citation", icp);
1825                 FuncRequest fr(LFUN_INSET_INSERT, icstr);
1826                 lyx::dispatch(fr);
1827                 break;
1828         }
1829
1830         case LFUN_INSET_APPLY: {
1831                 string const name = cmd.getArg(0);
1832                 Inset * inset = editedInset(name);
1833                 if (!inset) {
1834                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1835                         lyx::dispatch(fr);
1836                         break;
1837                 }
1838                 // put cursor in front of inset.
1839                 if (!setCursorFromInset(inset)) {
1840                         LASSERT(false, break);
1841                 }
1842                 cur.recordUndo();
1843                 FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1844                 inset->dispatch(cur, fr);
1845                 dr.update(Update::SinglePar | Update::FitCursor);
1846                 dr.forceBufferUpdate();
1847                 break;
1848         }
1849
1850         default:
1851                 dispatched = false;
1852                 break;
1853         }
1854
1855         buffer_.undo().endUndoGroup();
1856         dr.dispatched(dispatched);
1857         return;
1858 }
1859
1860
1861 docstring const BufferView::requestSelection()
1862 {
1863         Cursor & cur = d->cursor_;
1864
1865         LYXERR(Debug::SELECTION, "requestSelection: cur.selection: " << cur.selection());
1866         if (!cur.selection()) {
1867                 d->xsel_cache_.set = false;
1868                 return docstring();
1869         }
1870
1871         LYXERR(Debug::SELECTION, "requestSelection: xsel_cache.set: " << d->xsel_cache_.set);
1872         if (!d->xsel_cache_.set ||
1873             cur.top() != d->xsel_cache_.cursor ||
1874             cur.realAnchor().top() != d->xsel_cache_.anchor)
1875         {
1876                 d->xsel_cache_.cursor = cur.top();
1877                 d->xsel_cache_.anchor = cur.realAnchor().top();
1878                 d->xsel_cache_.set = cur.selection();
1879                 return cur.selectionAsString(false);
1880         }
1881         return docstring();
1882 }
1883
1884
1885 void BufferView::clearSelection()
1886 {
1887         d->cursor_.clearSelection();
1888         // Clear the selection buffer. Otherwise a subsequent
1889         // middle-mouse-button paste would use the selection buffer,
1890         // not the more current external selection.
1891         cap::clearSelection();
1892         d->xsel_cache_.set = false;
1893         // The buffer did not really change, but this causes the
1894         // redraw we need because we cleared the selection above.
1895         buffer_.changed(false);
1896 }
1897
1898
1899 void BufferView::resize(int width, int height)
1900 {
1901         // Update from work area
1902         width_ = width;
1903         height_ = height;
1904
1905         // Clear the paragraph height cache.
1906         d->par_height_.clear();
1907         // Redo the metrics.
1908         updateMetrics();
1909 }
1910
1911
1912 Inset const * BufferView::getCoveringInset(Text const & text,
1913                 int x, int y) const
1914 {
1915         TextMetrics & tm = d->text_metrics_[&text];
1916         Inset * inset = tm.checkInsetHit(x, y);
1917         if (!inset)
1918                 return 0;
1919
1920         if (!inset->descendable(*this))
1921                 // No need to go further down if the inset is not
1922                 // descendable.
1923                 return inset;
1924
1925         size_t cell_number = inset->nargs();
1926         // Check all the inner cell.
1927         for (size_t i = 0; i != cell_number; ++i) {
1928                 Text const * inner_text = inset->getText(i);
1929                 if (inner_text) {
1930                         // Try deeper.
1931                         Inset const * inset_deeper =
1932                                 getCoveringInset(*inner_text, x, y);
1933                         if (inset_deeper)
1934                                 return inset_deeper;
1935                 }
1936         }
1937
1938         return inset;
1939 }
1940
1941
1942 void BufferView::updateHoveredInset() const
1943 {
1944         // Get inset under mouse, if there is one.
1945         Inset const * covering_inset = getCoveringInset(buffer_.text(),
1946                         d->mouse_position_cache_.x_, d->mouse_position_cache_.y_);
1947         if (covering_inset == d->last_inset_)
1948                 // Same inset, no need to do anything...
1949                 return;
1950
1951         bool need_redraw = false;
1952         if (d->last_inset_) {
1953                 // Remove the hint on the last hovered inset (if any).
1954                 need_redraw |= d->last_inset_->setMouseHover(this, false);
1955                 d->last_inset_ = 0;
1956         }
1957
1958         // const_cast because of setMouseHover().
1959         Inset * inset = const_cast<Inset *>(covering_inset);
1960         if (inset && inset->setMouseHover(this, true)) {
1961                 need_redraw = true;
1962                 // Only the insets that accept the hover state, do
1963                 // clear the last_inset_, so only set the last_inset_
1964                 // member if the hovered setting is accepted.
1965                 d->last_inset_ = inset;
1966         }
1967
1968         if (need_redraw) {
1969                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
1970                                 << d->mouse_position_cache_.x_ << ", "
1971                                 << d->mouse_position_cache_.y_ << ")");
1972
1973                 d->update_strategy_ = DecorationUpdate;
1974
1975                 // This event (moving without mouse click) is not passed further.
1976                 // This should be changed if it is further utilized.
1977                 buffer_.changed(false);
1978         }
1979 }
1980
1981
1982 void BufferView::clearLastInset(Inset * inset) const
1983 {
1984         if (d->last_inset_ != inset) {
1985                 LYXERR0("Wrong last_inset!");
1986                 LASSERT(false, /**/);
1987         }
1988         d->last_inset_ = 0;
1989 }
1990
1991
1992 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
1993 {
1994         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
1995
1996         // This is only called for mouse related events including
1997         // LFUN_FILE_OPEN generated by drag-and-drop.
1998         FuncRequest cmd = cmd0;
1999
2000         Cursor old = cursor();
2001         Cursor cur(*this);
2002         cur.push(buffer_.inset());
2003         cur.setSelection(d->cursor_.selection());
2004
2005         // Either the inset under the cursor or the
2006         // surrounding Text will handle this event.
2007
2008         // make sure we stay within the screen...
2009         cmd.set_y(min(max(cmd.y(), -1), height_));
2010
2011         d->mouse_position_cache_.x_ = cmd.x();
2012         d->mouse_position_cache_.y_ = cmd.y();
2013
2014         if (cmd.action() == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
2015                 updateHoveredInset();
2016                 return;
2017         }
2018
2019         // Build temporary cursor.
2020         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x(), cmd.y());
2021
2022         // Put anchor at the same position.
2023         cur.resetAnchor();
2024
2025         cur.beginUndoGroup();
2026
2027         // Try to dispatch to an non-editable inset near this position
2028         // via the temp cursor. If the inset wishes to change the real
2029         // cursor it has to do so explicitly by using
2030         //  cur.bv().cursor() = cur;  (or similar)
2031         if (inset)
2032                 inset->dispatch(cur, cmd);
2033
2034         // Now dispatch to the temporary cursor. If the real cursor should
2035         // be modified, the inset's dispatch has to do so explicitly.
2036         if (!inset || !cur.result().dispatched())
2037                 cur.dispatch(cmd);
2038
2039         cur.endUndoGroup();
2040
2041         // Notify left insets
2042         if (cur != old) {
2043                 old.fixIfBroken();
2044                 bool badcursor = notifyCursorLeavesOrEnters(old, cur);
2045                 if (badcursor)
2046                         cursor().fixIfBroken();
2047         }
2048
2049         // Do we have a selection?
2050         theSelection().haveSelection(cursor().selection());
2051
2052         // If the command has been dispatched,
2053         if (cur.result().dispatched() || cur.result().update())
2054                 processUpdateFlags(cur.result().update());
2055 }
2056
2057
2058 void BufferView::lfunScroll(FuncRequest const & cmd)
2059 {
2060         string const scroll_type = cmd.getArg(0);
2061         int scroll_step = 0;
2062         if (scroll_type == "line")
2063                 scroll_step = d->scrollbarParameters_.single_step;
2064         else if (scroll_type == "page")
2065                 scroll_step = d->scrollbarParameters_.page_step;
2066         else
2067                 return;
2068         string const scroll_quantity = cmd.getArg(1);
2069         if (scroll_quantity == "up")
2070                 scrollUp(scroll_step);
2071         else if (scroll_quantity == "down")
2072                 scrollDown(scroll_step);
2073         else {
2074                 int const scroll_value = convert<int>(scroll_quantity);
2075                 if (scroll_value)
2076                         scroll(scroll_step * scroll_value);
2077         }
2078         buffer_.changed(true);
2079         updateHoveredInset();
2080 }
2081
2082
2083 int BufferView::minVisiblePart()
2084 {
2085         return 2 * defaultRowHeight();
2086 }
2087
2088
2089 int BufferView::scroll(int y)
2090 {
2091         if (y > 0)
2092                 return scrollDown(y);
2093         if (y < 0)
2094                 return scrollUp(-y);
2095         return 0;
2096 }
2097
2098
2099 int BufferView::scrollDown(int offset)
2100 {
2101         Text * text = &buffer_.text();
2102         TextMetrics & tm = d->text_metrics_[text];
2103         int const ymax = height_ + offset;
2104         while (true) {
2105                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
2106                 int bottom_pos = last.second->position() + last.second->descent();
2107                 if (lyxrc.scroll_below_document)
2108                         bottom_pos += height_ - minVisiblePart();
2109                 if (last.first + 1 == int(text->paragraphs().size())) {
2110                         if (bottom_pos <= height_)
2111                                 return 0;
2112                         offset = min(offset, bottom_pos - height_);
2113                         break;
2114                 }
2115                 if (bottom_pos > ymax)
2116                         break;
2117                 tm.newParMetricsDown();
2118         }
2119         d->anchor_ypos_ -= offset;
2120         return -offset;
2121 }
2122
2123
2124 int BufferView::scrollUp(int offset)
2125 {
2126         Text * text = &buffer_.text();
2127         TextMetrics & tm = d->text_metrics_[text];
2128         int ymin = - offset;
2129         while (true) {
2130                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
2131                 int top_pos = first.second->position() - first.second->ascent();
2132                 if (first.first == 0) {
2133                         if (top_pos >= 0)
2134                                 return 0;
2135                         offset = min(offset, - top_pos);
2136                         break;
2137                 }
2138                 if (top_pos < ymin)
2139                         break;
2140                 tm.newParMetricsUp();
2141         }
2142         d->anchor_ypos_ += offset;
2143         return offset;
2144 }
2145
2146
2147 void BufferView::setCursorFromRow(int row)
2148 {
2149         int tmpid = -1;
2150         int tmppos = -1;
2151
2152         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
2153
2154         d->cursor_.reset();
2155         if (tmpid == -1)
2156                 buffer_.text().setCursor(d->cursor_, 0, 0);
2157         else
2158                 buffer_.text().setCursor(d->cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
2159         recenter();
2160 }
2161
2162
2163 bool BufferView::setCursorFromInset(Inset const * inset)
2164 {
2165         // are we already there?
2166         if (cursor().nextInset() == inset)
2167                 return true;
2168
2169         // Inset is not at cursor position. Find it in the document.
2170         Cursor cur(*this);
2171         cur.reset();
2172         while (cur && cur.nextInset() != inset)
2173                 cur.forwardInset();
2174
2175         if (cur) {
2176                 setCursor(cur);
2177                 return true;
2178         }
2179         return false;
2180 }
2181
2182
2183 void BufferView::gotoLabel(docstring const & label)
2184 {
2185         std::vector<Buffer const *> bufs = buffer().allRelatives();
2186         std::vector<Buffer const *>::iterator it = bufs.begin();
2187         for (; it != bufs.end(); ++it) {
2188                 Buffer const * buf = *it;
2189
2190                 // find label
2191                 Toc & toc = buf->tocBackend().toc("label");
2192                 TocIterator toc_it = toc.begin();
2193                 TocIterator end = toc.end();
2194                 for (; toc_it != end; ++toc_it) {
2195                         if (label == toc_it->str()) {
2196                                 lyx::dispatch(toc_it->action());
2197                                 return;
2198                         }
2199                 }
2200         }
2201 }
2202
2203
2204 TextMetrics const & BufferView::textMetrics(Text const * t) const
2205 {
2206         return const_cast<BufferView *>(this)->textMetrics(t);
2207 }
2208
2209
2210 TextMetrics & BufferView::textMetrics(Text const * t)
2211 {
2212         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
2213         if (tmc_it == d->text_metrics_.end()) {
2214                 tmc_it = d->text_metrics_.insert(
2215                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
2216         }
2217         return tmc_it->second;
2218 }
2219
2220
2221 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
2222                 pit_type pit) const
2223 {
2224         return textMetrics(t).parMetrics(pit);
2225 }
2226
2227
2228 int BufferView::workHeight() const
2229 {
2230         return height_;
2231 }
2232
2233
2234 void BufferView::setCursor(DocIterator const & dit)
2235 {
2236         d->cursor_.reset();
2237         size_t const n = dit.depth();
2238         for (size_t i = 0; i < n; ++i)
2239                 dit[i].inset().edit(d->cursor_, true);
2240
2241         d->cursor_.setCursor(dit);
2242         d->cursor_.setSelection(false);
2243 }
2244
2245
2246 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
2247 {
2248         // Would be wrong to delete anything if we have a selection.
2249         if (cur.selection())
2250                 return false;
2251
2252         bool need_anchor_change = false;
2253         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
2254                 need_anchor_change);
2255
2256         if (need_anchor_change)
2257                 cur.resetAnchor();
2258
2259         if (!changed)
2260                 return false;
2261
2262         d->cursor_ = cur;
2263
2264         cur.forceBufferUpdate();
2265         buffer_.changed(true);
2266         return true;
2267 }
2268
2269
2270 bool BufferView::mouseSetCursor(Cursor & cur, bool select)
2271 {
2272         LASSERT(&cur.bv() == this, /**/);
2273
2274         if (!select)
2275                 // this event will clear selection so we save selection for
2276                 // persistent selection
2277                 cap::saveSelection(cursor());
2278
2279         d->cursor_.macroModeClose();
2280
2281         // Has the cursor just left the inset?
2282         bool leftinset = (&d->cursor_.inset() != &cur.inset());
2283         if (leftinset)
2284                 d->cursor_.fixIfBroken();
2285
2286         // FIXME: shift-mouse selection doesn't work well across insets.
2287         bool do_selection = select && &d->cursor_.normalAnchor().inset() == &cur.inset();
2288
2289         // do the dEPM magic if needed
2290         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
2291         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
2292         // the leftinset bool would not be necessary (badcursor instead).
2293         bool update = leftinset;
2294         if (!do_selection && d->cursor_.inTexted())
2295                 update |= checkDepm(cur, d->cursor_);
2296
2297         if (!do_selection)
2298                 d->cursor_.resetAnchor();
2299         d->cursor_.setCursor(cur);
2300         d->cursor_.boundary(cur.boundary());
2301         if (do_selection)
2302                 d->cursor_.setSelection();
2303         else
2304                 d->cursor_.clearSelection();
2305
2306         d->cursor_.finishUndo();
2307         d->cursor_.setCurrentFont();
2308         if (update)
2309                 cur.forceBufferUpdate();
2310         return update;
2311 }
2312
2313
2314 void BufferView::putSelectionAt(DocIterator const & cur,
2315                                 int length, bool backwards)
2316 {
2317         d->cursor_.clearSelection();
2318
2319         setCursor(cur);
2320
2321         if (length) {
2322                 if (backwards) {
2323                         d->cursor_.pos() += length;
2324                         d->cursor_.setSelection(d->cursor_, -length);
2325                 } else
2326                         d->cursor_.setSelection(d->cursor_, length);
2327         }
2328         // Ensure a redraw happens in any case because the new selection could
2329         // possibly be on the same screen as the previous selection.
2330         processUpdateFlags(Update::Force | Update::FitCursor);
2331 }
2332
2333
2334 Cursor & BufferView::cursor()
2335 {
2336         return d->cursor_;
2337 }
2338
2339
2340 Cursor const & BufferView::cursor() const
2341 {
2342         return d->cursor_;
2343 }
2344
2345
2346 pit_type BufferView::anchor_ref() const
2347 {
2348         return d->anchor_pit_;
2349 }
2350
2351
2352 bool BufferView::singleParUpdate()
2353 {
2354         Text & buftext = buffer_.text();
2355         pit_type const bottom_pit = d->cursor_.bottom().pit();
2356         TextMetrics & tm = textMetrics(&buftext);
2357         int old_height = tm.parMetrics(bottom_pit).height();
2358
2359         // make sure inline completion pointer is ok
2360         if (d->inlineCompletionPos_.fixIfBroken())
2361                 d->inlineCompletionPos_ = DocIterator();
2362
2363         // In Single Paragraph mode, rebreak only
2364         // the (main text, not inset!) paragraph containing the cursor.
2365         // (if this paragraph contains insets etc., rebreaking will
2366         // recursively descend)
2367         tm.redoParagraph(bottom_pit);
2368         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
2369         if (pm.height() != old_height)
2370                 // Paragraph height has changed so we cannot proceed to
2371                 // the singlePar optimisation.
2372                 return false;
2373
2374         d->update_strategy_ = SingleParUpdate;
2375
2376         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
2377                 << " y2: " << pm.position() + pm.descent()
2378                 << " pit: " << bottom_pit
2379                 << " singlepar: 1");
2380         return true;
2381 }
2382
2383
2384 void BufferView::updateMetrics()
2385 {
2386         if (height_ == 0 || width_ == 0)
2387                 return;
2388
2389         Text & buftext = buffer_.text();
2390         pit_type const npit = int(buftext.paragraphs().size());
2391
2392         // Clear out the position cache in case of full screen redraw,
2393         d->coord_cache_.clear();
2394
2395         // Clear out paragraph metrics to avoid having invalid metrics
2396         // in the cache from paragraphs not relayouted below
2397         // The complete text metrics will be redone.
2398         d->text_metrics_.clear();
2399
2400         TextMetrics & tm = textMetrics(&buftext);
2401
2402         // make sure inline completion pointer is ok
2403         if (d->inlineCompletionPos_.fixIfBroken())
2404                 d->inlineCompletionPos_ = DocIterator();
2405
2406         if (d->anchor_pit_ >= npit)
2407                 // The anchor pit must have been deleted...
2408                 d->anchor_pit_ = npit - 1;
2409
2410         // Rebreak anchor paragraph.
2411         tm.redoParagraph(d->anchor_pit_);
2412         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
2413
2414         // position anchor
2415         if (d->anchor_pit_ == 0) {
2416                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
2417
2418                 // Complete buffer visible? Then it's easy.
2419                 if (scrollRange == 0)
2420                         d->anchor_ypos_ = anchor_pm.ascent();
2421
2422                 // FIXME: Some clever handling needed to show
2423                 // the _first_ paragraph up to the top if the cursor is
2424                 // in the first line.
2425         }
2426         anchor_pm.setPosition(d->anchor_ypos_);
2427
2428         LYXERR(Debug::PAINTING, "metrics: "
2429                 << " anchor pit = " << d->anchor_pit_
2430                 << " anchor ypos = " << d->anchor_ypos_);
2431
2432         // Redo paragraphs above anchor if necessary.
2433         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
2434         // We are now just above the anchor paragraph.
2435         pit_type pit1 = d->anchor_pit_ - 1;
2436         for (; pit1 >= 0 && y1 >= 0; --pit1) {
2437                 tm.redoParagraph(pit1);
2438                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
2439                 y1 -= pm.descent();
2440                 // Save the paragraph position in the cache.
2441                 pm.setPosition(y1);
2442                 y1 -= pm.ascent();
2443         }
2444
2445         // Redo paragraphs below the anchor if necessary.
2446         int y2 = d->anchor_ypos_ + anchor_pm.descent();
2447         // We are now just below the anchor paragraph.
2448         pit_type pit2 = d->anchor_pit_ + 1;
2449         for (; pit2 < npit && y2 <= height_; ++pit2) {
2450                 tm.redoParagraph(pit2);
2451                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
2452                 y2 += pm.ascent();
2453                 // Save the paragraph position in the cache.
2454                 pm.setPosition(y2);
2455                 y2 += pm.descent();
2456         }
2457
2458         LYXERR(Debug::PAINTING, "Metrics: "
2459                 << " anchor pit = " << d->anchor_pit_
2460                 << " anchor ypos = " << d->anchor_ypos_
2461                 << " y1 = " << y1
2462                 << " y2 = " << y2
2463                 << " pit1 = " << pit1
2464                 << " pit2 = " << pit2);
2465
2466         d->update_strategy_ = FullScreenUpdate;
2467
2468         if (lyxerr.debugging(Debug::WORKAREA)) {
2469                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
2470                 d->coord_cache_.dump();
2471         }
2472 }
2473
2474
2475 void BufferView::insertLyXFile(FileName const & fname)
2476 {
2477         LASSERT(d->cursor_.inTexted(), /**/);
2478
2479         // Get absolute path of file and add ".lyx"
2480         // to the filename if necessary
2481         FileName filename = fileSearch(string(), fname.absFileName(), "lyx");
2482
2483         docstring const disp_fn = makeDisplayPath(filename.absFileName());
2484         // emit message signal.
2485         message(bformat(_("Inserting document %1$s..."), disp_fn));
2486
2487         docstring res;
2488         Buffer buf("", false);
2489         if (buf.loadLyXFile(filename)) {
2490                 ErrorList & el = buffer_.errorList("Parse");
2491                 // Copy the inserted document error list into the current buffer one.
2492                 el = buf.errorList("Parse");
2493                 buffer_.undo().recordUndo(d->cursor_);
2494                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
2495                                              buf.params().documentClassPtr(), el);
2496                 res = _("Document %1$s inserted.");
2497         } else {
2498                 res = _("Could not insert document %1$s");
2499         }
2500
2501         buffer_.changed(true);
2502         // emit message signal.
2503         message(bformat(res, disp_fn));
2504         buffer_.errors("Parse");
2505 }
2506
2507
2508 Point BufferView::coordOffset(DocIterator const & dit) const
2509 {
2510         int x = 0;
2511         int y = 0;
2512         int lastw = 0;
2513
2514         // Addup contribution of nested insets, from inside to outside,
2515         // keeping the outer paragraph for a special handling below
2516         for (size_t i = dit.depth() - 1; i >= 1; --i) {
2517                 CursorSlice const & sl = dit[i];
2518                 int xx = 0;
2519                 int yy = 0;
2520
2521                 // get relative position inside sl.inset()
2522                 sl.inset().cursorPos(*this, sl, dit.boundary() && (i + 1 == dit.depth()), xx, yy);
2523
2524                 // Make relative position inside of the edited inset relative to sl.inset()
2525                 x += xx;
2526                 y += yy;
2527
2528                 // In case of an RTL inset, the edited inset will be positioned to the left
2529                 // of xx:yy
2530                 if (sl.text()) {
2531                         bool boundary_i = dit.boundary() && i + 1 == dit.depth();
2532                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
2533                         if (rtl)
2534                                 x -= lastw;
2535                 }
2536
2537                 // remember width for the case that sl.inset() is positioned in an RTL inset
2538                 if (i && dit[i - 1].text()) {
2539                         // If this Inset is inside a Text Inset, retrieve the Dimension
2540                         // from the containing text instead of using Inset::dimension() which
2541                         // might not be implemented.
2542                         // FIXME (Abdel 23/09/2007): this is a bit messy because of the
2543                         // elimination of Inset::dim_ cache. This coordOffset() method needs
2544                         // to be rewritten in light of the new design.
2545                         Dimension const & dim = parMetrics(dit[i - 1].text(),
2546                                 dit[i - 1].pit()).insetDimension(&sl.inset());
2547                         lastw = dim.wid;
2548                 } else {
2549                         Dimension const dim = sl.inset().dimension(*this);
2550                         lastw = dim.wid;
2551                 }
2552
2553                 //lyxerr << "Cursor::getPos, i: "
2554                 // << i << " x: " << xx << " y: " << y << endl;
2555         }
2556
2557         // Add contribution of initial rows of outermost paragraph
2558         CursorSlice const & sl = dit[0];
2559         TextMetrics const & tm = textMetrics(sl.text());
2560         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
2561         LASSERT(!pm.rows().empty(), /**/);
2562         y -= pm.rows()[0].ascent();
2563 #if 1
2564         // FIXME: document this mess
2565         size_t rend;
2566         if (sl.pos() > 0 && dit.depth() == 1) {
2567                 int pos = sl.pos();
2568                 if (pos && dit.boundary())
2569                         --pos;
2570 //              lyxerr << "coordOffset: boundary:" << dit.boundary() << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
2571                 rend = pm.pos2row(pos);
2572         } else
2573                 rend = pm.pos2row(sl.pos());
2574 #else
2575         size_t rend = pm.pos2row(sl.pos());
2576 #endif
2577         for (size_t rit = 0; rit != rend; ++rit)
2578                 y += pm.rows()[rit].height();
2579         y += pm.rows()[rend].ascent();
2580
2581         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2582
2583         // Make relative position from the nested inset now bufferview absolute.
2584         int xx = bottom_tm.cursorX(dit.bottom(), dit.boundary() && dit.depth() == 1);
2585         x += xx;
2586
2587         // In the RTL case place the nested inset at the left of the cursor in
2588         // the outer paragraph
2589         bool boundary_1 = dit.boundary() && 1 == dit.depth();
2590         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2591         if (rtl)
2592                 x -= lastw;
2593
2594         return Point(x, y);
2595 }
2596
2597
2598 Point BufferView::getPos(DocIterator const & dit) const
2599 {
2600         if (!paragraphVisible(dit))
2601                 return Point(-1, -1);
2602
2603         CursorSlice const & bot = dit.bottom();
2604         TextMetrics const & tm = textMetrics(bot.text());
2605
2606         // offset from outer paragraph
2607         Point p = coordOffset(dit);
2608         p.y_ += tm.parMetrics(bot.pit()).position();
2609         return p;
2610 }
2611
2612
2613 bool BufferView::paragraphVisible(DocIterator const & dit) const
2614 {
2615         CursorSlice const & bot = dit.bottom();
2616         TextMetrics const & tm = textMetrics(bot.text());
2617
2618         return tm.contains(bot.pit());
2619 }
2620
2621
2622 void BufferView::cursorPosAndHeight(Point & p, int & h) const
2623 {
2624         Cursor const & cur = cursor();
2625         Font const font = cur.getFont();
2626         frontend::FontMetrics const & fm = theFontMetrics(font);
2627         int const asc = fm.maxAscent();
2628         int const des = fm.maxDescent();
2629         h = asc + des;
2630         p = getPos(cur);
2631         p.y_ -= asc;
2632 }
2633
2634
2635 bool BufferView::cursorInView(Point const & p, int h) const
2636 {
2637         Cursor const & cur = cursor();
2638         // does the cursor touch the screen ?
2639         if (p.y_ + h < 0 || p.y_ >= workHeight() || !paragraphVisible(cur))
2640                 return false;
2641         return true;
2642 }
2643
2644
2645 void BufferView::draw(frontend::Painter & pain)
2646 {
2647         if (height_ == 0 || width_ == 0)
2648                 return;
2649         LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
2650
2651         Text & text = buffer_.text();
2652         TextMetrics const & tm = d->text_metrics_[&text];
2653         int const y = tm.first().second->position();
2654         PainterInfo pi(this, pain);
2655
2656         switch (d->update_strategy_) {
2657
2658         case NoScreenUpdate:
2659                 // If no screen painting is actually needed, only some the different
2660                 // coordinates of insets and paragraphs needs to be updated.
2661                 pi.full_repaint = true;
2662                 pi.pain.setDrawingEnabled(false);
2663                 tm.draw(pi, 0, y);
2664                 break;
2665
2666         case SingleParUpdate:
2667                 pi.full_repaint = false;
2668                 // In general, only the current row of the outermost paragraph
2669                 // will be redrawn. Particular cases where selection spans
2670                 // multiple paragraph are correctly detected in TextMetrics.
2671                 tm.draw(pi, 0, y);
2672                 break;
2673
2674         case DecorationUpdate:
2675                 // FIXME: We should also distinguish DecorationUpdate to avoid text
2676                 // drawing if possible. This is not possible to do easily right now
2677                 // because of the single backing pixmap.
2678
2679         case FullScreenUpdate:
2680                 // The whole screen, including insets, will be refreshed.
2681                 pi.full_repaint = true;
2682
2683                 // Clear background.
2684                 pain.fillRectangle(0, 0, width_, height_,
2685                         pi.backgroundColor(&buffer_.inset()));
2686
2687                 // Draw everything.
2688                 tm.draw(pi, 0, y);
2689
2690                 // and possibly grey out below
2691                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2692                 int const y2 = lastpm.second->position() + lastpm.second->descent();
2693
2694                 if (y2 < height_) {
2695                         Color color = buffer().isInternal()
2696                                 ? Color_background : Color_bottomarea;
2697                         pain.fillRectangle(0, y2, width_, height_ - y2, color);
2698                 }
2699                 break;
2700         }
2701         LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
2702
2703         // The scrollbar needs an update.
2704         updateScrollbar();
2705
2706         // Normalize anchor for next time
2707         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
2708         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2709         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
2710                 ParagraphMetrics const & pm = tm.parMetrics(pit);
2711                 if (pm.position() + pm.descent() > 0) {
2712                         d->anchor_pit_ = pit;
2713                         d->anchor_ypos_ = pm.position();
2714                         break;
2715                 }
2716         }
2717         LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
2718                 << "  anchor ypos = " << d->anchor_ypos_);
2719 }
2720
2721
2722 void BufferView::message(docstring const & msg)
2723 {
2724         if (d->gui_)
2725                 d->gui_->message(msg);
2726 }
2727
2728
2729 void BufferView::showDialog(string const & name)
2730 {
2731         if (d->gui_)
2732                 d->gui_->showDialog(name, string());
2733 }
2734
2735
2736 void BufferView::showDialog(string const & name,
2737         string const & data, Inset * inset)
2738 {
2739         if (d->gui_)
2740                 d->gui_->showDialog(name, data, inset);
2741 }
2742
2743
2744 void BufferView::updateDialog(string const & name, string const & data)
2745 {
2746         if (d->gui_)
2747                 d->gui_->updateDialog(name, data);
2748 }
2749
2750
2751 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
2752 {
2753         d->gui_ = gui;
2754 }
2755
2756
2757 // FIXME: Move this out of BufferView again
2758 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
2759 {
2760         if (!fname.isReadableFile()) {
2761                 docstring const error = from_ascii(strerror(errno));
2762                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
2763                 docstring const text =
2764                   bformat(_("Could not read the specified document\n"
2765                             "%1$s\ndue to the error: %2$s"), file, error);
2766                 Alert::error(_("Could not read file"), text);
2767                 return docstring();
2768         }
2769
2770         if (!fname.isReadableFile()) {
2771                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
2772                 docstring const text =
2773                   bformat(_("%1$s\n is not readable."), file);
2774                 Alert::error(_("Could not open file"), text);
2775                 return docstring();
2776         }
2777
2778         // FIXME UNICODE: We don't know the encoding of the file
2779         docstring file_content = fname.fileContents("UTF-8");
2780         if (file_content.empty()) {
2781                 Alert::error(_("Reading not UTF-8 encoded file"),
2782                              _("The file is not UTF-8 encoded.\n"
2783                                "It will be read as local 8Bit-encoded.\n"
2784                                "If this does not give the correct result\n"
2785                                "then please change the encoding of the file\n"
2786                                "to UTF-8 with a program other than LyX.\n"));
2787                 file_content = fname.fileContents("local8bit");
2788         }
2789
2790         return normalize_c(file_content);
2791 }
2792
2793
2794 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
2795 {
2796         docstring const tmpstr = contentsOfPlaintextFile(f);
2797
2798         if (tmpstr.empty())
2799                 return;
2800
2801         Cursor & cur = cursor();
2802         cap::replaceSelection(cur);
2803         buffer_.undo().recordUndo(cur);
2804         if (asParagraph)
2805                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr, cur.current_font);
2806         else
2807                 cur.innerText()->insertStringAsLines(cur, tmpstr, cur.current_font);
2808
2809         buffer_.changed(true);
2810 }
2811
2812
2813 docstring const & BufferView::inlineCompletion() const
2814 {
2815         return d->inlineCompletion_;
2816 }
2817
2818
2819 size_t const & BufferView::inlineCompletionUniqueChars() const
2820 {
2821         return d->inlineCompletionUniqueChars_;
2822 }
2823
2824
2825 DocIterator const & BufferView::inlineCompletionPos() const
2826 {
2827         return d->inlineCompletionPos_;
2828 }
2829
2830
2831 bool samePar(DocIterator const & a, DocIterator const & b)
2832 {
2833         if (a.empty() && b.empty())
2834                 return true;
2835         if (a.empty() || b.empty())
2836                 return false;
2837         if (a.depth() != b.depth())
2838                 return false;
2839         return &a.innerParagraph() == &b.innerParagraph();
2840 }
2841
2842
2843 void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
2844         docstring const & completion, size_t uniqueChars)
2845 {
2846         uniqueChars = min(completion.size(), uniqueChars);
2847         bool changed = d->inlineCompletion_ != completion
2848                 || d->inlineCompletionUniqueChars_ != uniqueChars;
2849         bool singlePar = true;
2850         d->inlineCompletion_ = completion;
2851         d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
2852
2853         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
2854
2855         // at new position?
2856         DocIterator const & old = d->inlineCompletionPos_;
2857         if (old != pos) {
2858                 //lyxerr << "inlineCompletionPos changed" << std::endl;
2859                 // old or pos are in another paragraph?
2860                 if ((!samePar(cur, pos) && !pos.empty())
2861                     || (!samePar(cur, old) && !old.empty())) {
2862                         singlePar = false;
2863                         //lyxerr << "different paragraph" << std::endl;
2864                 }
2865                 d->inlineCompletionPos_ = pos;
2866         }
2867
2868         // set update flags
2869         if (changed) {
2870                 if (singlePar && !(cur.result().update() & Update::Force))
2871                         cur.screenUpdateFlags(cur.result().update() | Update::SinglePar);
2872                 else
2873                         cur.screenUpdateFlags(cur.result().update() | Update::Force);
2874         }
2875 }
2876
2877 } // namespace lyx