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 "Length.h"
  39 #include "Lexer.h"
  40 #include "LyX.h"
  41 #include "LyXAction.h"
  42 #include "lyxfind.h"
  43 #include "Layout.h"
  44 #include "LyXRC.h"
  45 #include "MetricsInfo.h"
  46 #include "Paragraph.h"
  47 #include "ParagraphParameters.h"
  48 #include "ParIterator.h"
  49 #include "RowPainter.h"
  50 #include "Session.h"
  51 #include "Text.h"
  52 #include "TextClass.h"
  53 #include "TextMetrics.h"
  54 #include "TexRow.h"
  55 #include "TocBackend.h"
  56 #include "WordLangTuple.h"
  57
  58 #include "insets/InsetBibtex.h"
  59 #include "insets/InsetCitation.h"
  60 #include "insets/InsetCommand.h" // ChangeRefs
  61 #include "insets/InsetExternal.h"
  62 #include "insets/InsetGraphics.h"
  63 #include "insets/InsetNote.h"
  64 #include "insets/InsetRef.h"
  65 #include "insets/InsetText.h"
  66
  67 #include "mathed/MathData.h"
  68 #include "mathed/InsetMathNest.h"
  69
  70 #include "frontends/alert.h"
  71 #include "frontends/Application.h"
  72 #include "frontends/Delegates.h"
  73 #include "frontends/FontMetrics.h"
  74 #include "frontends/NullPainter.h"
  75 #include "frontends/Painter.h"
  76 #include "frontends/Selection.h"
  77
  78 #include "support/convert.h"
  79 #include "support/debug.h"
  80 #include "support/ExceptionMessage.h"
  81 #include "support/filetools.h"
  82 #include "support/gettext.h"
  83 #include "support/lassert.h"
  84 #include "support/lstrings.h"
  85 #include "support/lyxlib.h"
  86 #include "support/Package.h"
  87 #include "support/types.h"
  88
  89 #include <cerrno>
  90 #include <fstream>
  91 #include <functional>
  92 #include <iterator>
  93 #include <sstream>
  94 #include <vector>
  95
  96 using namespace std;
  97 using namespace lyx::support;
  98
  99 namespace lyx {
 100
 101 namespace Alert = frontend::Alert;
 102
 103 namespace {
 104
 105 /// Return an inset of this class if it exists at the current cursor position
 106 template <class T>
 107 T * getInsetByCode(Cursor const & cur, InsetCode code)
 108 {
 109         DocIterator it = cur;
 110         Inset * inset = it.nextInset();
 111         if (inset && inset->lyxCode() == code)
 112                 return static_cast<T*>(inset);
 113         return 0;
 114 }
 115
 116
 117 /// Note that comparing contents can only be used for InsetCommand
 118 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 119         docstring const & contents)
 120 {
 121         DocIterator tmpdit = dit;
 122
 123         while (tmpdit) {
 124                 Inset const * inset = tmpdit.nextInset();
 125                 if (inset) {
 126                         bool const valid_code = std::find(codes.begin(), codes.end(),
 127                                 inset->lyxCode()) != codes.end();
 128                         InsetCommand const * ic = inset->asInsetCommand();
 129                         bool const same_or_no_contents =  contents.empty()
 130                                 || (ic && (ic->getFirstNonOptParam() == contents));
 131
 132                         if (valid_code && same_or_no_contents) {
 133                                 dit = tmpdit;
 134                                 return true;
 135                         }
 136                 }
 137                 tmpdit.forwardInset();
 138         }
 139
 140         return false;
 141 }
 142
 143
 144 /// Looks for next inset with one of the given codes.
 145 /// Note that same_content can only be used for InsetCommand
 146 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 147         bool same_content)
 148 {
 149         docstring contents;
 150         DocIterator tmpdit = dit;
 151         tmpdit.forwardInset();
 152         if (!tmpdit)
 153                 return false;
 154
 155         Inset const * inset = tmpdit.nextInset();
 156         if (same_content && inset) {
 157                 InsetCommand const * ic = inset->asInsetCommand();
 158                 if (ic) {
 159                         bool const valid_code = std::find(codes.begin(), codes.end(),
 160                                 ic->lyxCode()) != codes.end();
 161                         if (valid_code)
 162                                 contents = ic->getFirstNonOptParam();
 163                 }
 164         }
 165
 166         if (!findNextInset(tmpdit, codes, contents)) {
 167                 if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
 168                         inset = &tmpdit.bottom().inset();
 169                         tmpdit = doc_iterator_begin(&inset->buffer(), inset);
 170                         if (!findNextInset(tmpdit, codes, contents))
 171                                 return false;
 172                 } else {
 173                         return false;
 174                 }
 175         }
 176
 177         dit = tmpdit;
 178         return true;
 179 }
 180
 181
 182 /// Looks for next inset with the given code
 183 void findInset(DocIterator & dit, InsetCode code, bool same_content)
 184 {
 185         findInset(dit, vector<InsetCode>(1, code), same_content);
 186 }
 187
 188
 189 /// Moves cursor to the next inset with one of the given codes.
 190 void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
 191                bool same_content)
 192 {
 193         Cursor tmpcur = bv->cursor();
 194         if (!findInset(tmpcur, codes, same_content)) {
 195                 bv->cursor().message(_("No more insets"));
 196                 return;
 197         }
 198
 199         tmpcur.clearSelection();
 200         bv->setCursor(tmpcur);
 201         bv->showCursor();
 202 }
 203
 204
 205 /// Moves cursor to the next inset with given code.
 206 void gotoInset(BufferView * bv, InsetCode code, bool same_content)
 207 {
 208         gotoInset(bv, vector<InsetCode>(1, code), same_content);
 209 }
 210
 211
 212 /// A map from a Text to the associated text metrics
 213 typedef map<Text const *, TextMetrics> TextMetricsCache;
 214
 215 enum ScreenUpdateStrategy {
 216         NoScreenUpdate,
 217         SingleParUpdate,
 218         FullScreenUpdate,
 219         DecorationUpdate
 220 };
 221
 222 } // namespace
 223
 224
 225 /////////////////////////////////////////////////////////////////////
 226 //
 227 // BufferView
 228 //
 229 /////////////////////////////////////////////////////////////////////
 230
 231 struct BufferView::Private
 232 {
 233         Private(BufferView & bv) :
 234                 update_strategy_(FullScreenUpdate),
 235                 update_flags_(Update::Force),
 236                 wh_(0), cursor_(bv),
 237                 anchor_pit_(0), anchor_ypos_(0),
 238                 inlineCompletionUniqueChars_(0),
 239                 last_inset_(0), clickable_inset_(false),
 240                 mouse_position_cache_(),
 241                 bookmark_edit_position_(-1), gui_(0),
 242                 horiz_scroll_offset_(0),
 243                 caret_ascent_(0), caret_descent_(0)
 244         {
 245                 xsel_cache_.set = false;
 246         }
 247
 248         ///
 249         ScrollbarParameters scrollbarParameters_;
 250         ///
 251         ScreenUpdateStrategy update_strategy_;
 252         ///
 253         Update::flags update_flags_;
 254         ///
 255         CoordCache coord_cache_;
 256
 257         /// Estimated average par height for scrollbar.
 258         int wh_;
 259         /// this is used to handle XSelection events in the right manner.
 260         struct {
 261                 CursorSlice cursor;
 262                 CursorSlice anchor;
 263                 bool set;
 264         } xsel_cache_;
 265         ///
 266         Cursor cursor_;
 267         ///
 268         pit_type anchor_pit_;
 269         ///
 270         int anchor_ypos_;
 271         ///
 272         vector<int> par_height_;
 273
 274         ///
 275         DocIterator inlineCompletionPos_;
 276         ///
 277         docstring inlineCompletion_;
 278         ///
 279         size_t inlineCompletionUniqueChars_;
 280
 281         /// keyboard mapping object.
 282         Intl intl_;
 283
 284         /// last visited inset.
 285         /** kept to send setMouseHover(false).
 286           * Not owned, so don't delete.
 287           */
 288         Inset const * last_inset_;
 289         /// are we hovering something that we can click
 290         bool clickable_inset_;
 291
 292         /// position of the mouse at the time of the last mouse move
 293         /// This is used to update the hovering status of inset in
 294         /// cases where the buffer is scrolled, but the mouse didn't move.
 295         Point mouse_position_cache_;
 296
 297         // cache for id of the paragraph which was edited the last time
 298         int bookmark_edit_position_;
 299
 300         mutable TextMetricsCache text_metrics_;
 301
 302         /// Whom to notify.
 303         /** Not owned, so don't delete.
 304           */
 305         frontend::GuiBufferViewDelegate * gui_;
 306
 307         /// Cache for Find Next
 308         FuncRequest search_request_cache_;
 309
 310         ///
 311         map<string, Inset *> edited_insets_;
 312
 313         /// When the row where the cursor lies is scrolled, this
 314         /// contains the scroll offset
 315         int horiz_scroll_offset_;
 316         /// a slice pointing to the start of the row where the cursor
 317         /// is (at last draw time)
 318         CursorSlice current_row_slice_;
 319         /// a slice pointing to the start of the row where cursor was
 320         /// at previous draw event
 321         CursorSlice last_row_slice_;
 322
 323         // The vertical size of the blinking caret. Only used for math
 324         // Using it for text could be bad when undo restores the cursor
 325         // current font, since the caret size could become wrong.
 326         int caret_ascent_;
 327         int caret_descent_;
 328 };
 329
 330
 331 BufferView::BufferView(Buffer & buf)
 332         : width_(0), height_(0), full_screen_(false), buffer_(buf),
 333       d(new Private(*this))
 334 {
 335         d->xsel_cache_.set = false;
 336         d->intl_.initKeyMapper(lyxrc.use_kbmap);
 337
 338         d->cursor_.setBuffer(&buf);
 339         d->cursor_.push(buffer_.inset());
 340         d->cursor_.resetAnchor();
 341         d->cursor_.setCurrentFont();
 342
 343         buffer_.updatePreviews();
 344 }
 345
 346
 347 BufferView::~BufferView()
 348 {
 349         // current buffer is going to be switched-off, save cursor pos
 350         // Ideally, the whole cursor stack should be saved, but session
 351         // currently can only handle bottom (whole document) level pit and pos.
 352         // That is to say, if a cursor is in a nested inset, it will be
 353         // restore to the left of the top level inset.
 354         LastFilePosSection::FilePos fp;
 355         fp.pit = d->cursor_.bottom().pit();
 356         fp.pos = d->cursor_.bottom().pos();
 357         theSession().lastFilePos().save(buffer_.fileName(), fp);
 358
 359         if (d->last_inset_)
 360                 d->last_inset_->setMouseHover(this, false);
 361
 362         delete d;
 363 }
 364
 365
 366 int BufferView::rightMargin() const
 367 {
 368         // The value used to be hardcoded to 10
 369         int const default_margin = zoomedPixels(10);
 370         // The additional test for the case the outliner is opened.
 371         if (!full_screen_ || !lyxrc.full_screen_limit
 372             || width_ < lyxrc.full_screen_width + 2 * default_margin)
 373                 return default_margin;
 374
 375         return (width_ - lyxrc.full_screen_width) / 2;
 376 }
 377
 378
 379 int BufferView::leftMargin() const
 380 {
 381         return rightMargin();
 382 }
 383
 384
 385 int BufferView::inPixels(Length const & len) const
 386 {
 387         Font const font = buffer().params().getFont();
 388         return len.inPixels(workWidth(), theFontMetrics(font).em());
 389 }
 390
 391
 392 int BufferView::zoomedPixels(int pix) const
 393 {
 394         // FIXME: the dpi setting should really depend on the BufferView
 395         // (think different monitors).
 396
 397         // Zoom factor specified by user in percent
 398         double const zoom = lyxrc.currentZoom / 100.0; // [percent]
 399
 400         // DPI setting for monitor relative to 100dpi
 401         double const dpizoom = lyxrc.dpi / 100.0; // [per 100dpi]
 402
 403         return support::iround(pix * zoom * dpizoom);
 404 }
 405
 406
 407 bool BufferView::isTopScreen() const
 408 {
 409         return 0 == d->scrollbarParameters_.min;
 410 }
 411
 412
 413 bool BufferView::isBottomScreen() const
 414 {
 415         return 0 == d->scrollbarParameters_.max;
 416 }
 417
 418
 419 Intl & BufferView::getIntl()
 420 {
 421         return d->intl_;
 422 }
 423
 424
 425 Intl const & BufferView::getIntl() const
 426 {
 427         return d->intl_;
 428 }
 429
 430
 431 CoordCache & BufferView::coordCache()
 432 {
 433         return d->coord_cache_;
 434 }
 435
 436
 437 CoordCache const & BufferView::coordCache() const
 438 {
 439         return d->coord_cache_;
 440 }
 441
 442
 443 Buffer & BufferView::buffer()
 444 {
 445         return buffer_;
 446 }
 447
 448
 449 Buffer const & BufferView::buffer() const
 450 {
 451         return buffer_;
 452 }
 453
 454
 455 bool BufferView::needsFitCursor() const
 456 {
 457         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
 458                 frontend::FontMetrics const & fm =
 459                         theFontMetrics(d->cursor_.getFont().fontInfo());
 460                 int const asc = fm.maxAscent();
 461                 int const des = fm.maxDescent();
 462                 Point const p = getPos(d->cursor_);
 463                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 464                         return false;
 465         }
 466         return true;
 467 }
 468
 469
 470 namespace {
 471
 472 // this is for debugging only.
 473 string flagsAsString(Update::flags flags)
 474 {
 475         if (flags == Update::None)
 476                 return "None ";
 477         return string((flags & Update::FitCursor) ? "FitCursor " : "")
 478                 + ((flags & Update::Force) ? "Force " : "")
 479                 + ((flags & Update::ForceDraw) ? "ForceDraw " : "")
 480                 + ((flags & Update::SinglePar) ? "SinglePar " : "");
 481 }
 482
 483 }
 484
 485 void BufferView::processUpdateFlags(Update::flags flags)
 486 {
 487         LYXERR(Debug::PAINTING, "BufferView::processUpdateFlags( "
 488                    << flagsAsString(flags) << ")  buffer: " << &buffer_);
 489
 490         // Case when no explicit update is requested.
 491         if (flags == Update::None)
 492                 return;
 493
 494         // SinglePar is ignored for now (this should probably change). We
 495         // set it ourselves below, at the price of always rebreaking the
 496         // paragraph at cursor. This can be expensive for large tables.
 497         flags = flags & ~Update::SinglePar;
 498
 499         // First check whether the metrics and inset positions should be updated
 500         if (flags & Update::Force) {
 501                 // This will update the CoordCache items and replace Force
 502                 // with ForceDraw in flags.
 503                 updateMetrics(flags);
 504         }
 505
 506         // Then make sure that the screen contains the cursor if needed
 507         if (flags & Update::FitCursor) {
 508                 if (needsFitCursor()) {
 509                         scrollToCursor(d->cursor_, false);
 510                         // Metrics have to be recomputed (maybe again)
 511                         updateMetrics(flags);
 512                 }
 513                 flags = flags & ~Update::FitCursor;
 514         }
 515
 516         // Finally detect whether we can only repaint a single paragraph
 517         if (!(flags & Update::ForceDraw)) {
 518                 if (singleParUpdate())
 519                         flags = flags | Update::SinglePar;
 520                 else
 521                         updateMetrics(flags);
 522         }
 523
 524         // Add flags to the the update flags. These will be reset to None
 525         // after the redraw is actually done
 526         d->update_flags_ = d->update_flags_ | flags;
 527         LYXERR(Debug::PAINTING, "Cumulative flags: " << flagsAsString(flags));
 528
 529         // Now compute the update strategy
 530         // Possibly values in flag are None, Decoration, ForceDraw
 531         LATTEST((d->update_flags_ & ~(Update::None | Update::SinglePar
 532                                       | Update::Decoration | Update::ForceDraw)) == 0);
 533
 534         if (d->update_flags_ & Update::ForceDraw)
 535                 d->update_strategy_ = FullScreenUpdate;
 536         else if (d->update_flags_ & Update::Decoration)
 537                 d->update_strategy_ = DecorationUpdate;
 538         else if (d->update_flags_ & Update::SinglePar)
 539                 d->update_strategy_ = SingleParUpdate;
 540         else {
 541                 // no need to redraw anything.
 542                 d->update_strategy_ = NoScreenUpdate;
 543         }
 544
 545         updateHoveredInset();
 546
 547         // Trigger a redraw.
 548         buffer_.changed(false);
 549 }
 550
 551
 552 void BufferView::updateScrollbar()
 553 {
 554         if (height_ == 0 && width_ == 0)
 555                 return;
 556
 557         // We prefer fixed size line scrolling.
 558         d->scrollbarParameters_.single_step = defaultRowHeight();
 559         // We prefer full screen page scrolling.
 560         d->scrollbarParameters_.page_step = height_;
 561
 562         Text & t = buffer_.text();
 563         TextMetrics & tm = d->text_metrics_[&t];
 564
 565         LYXERR(Debug::GUI, " Updating scrollbar: height: "
 566                 << t.paragraphs().size()
 567                 << " curr par: " << d->cursor_.bottom().pit()
 568                 << " default height " << defaultRowHeight());
 569
 570         size_t const parsize = t.paragraphs().size();
 571         if (d->par_height_.size() != parsize) {
 572                 d->par_height_.clear();
 573                 // FIXME: We assume a default paragraph height of 2 rows. This
 574                 // should probably be pondered with the screen width.
 575                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
 576         }
 577
 578         // Look at paragraph heights on-screen
 579         pair<pit_type, ParagraphMetrics const *> first = tm.first();
 580         pair<pit_type, ParagraphMetrics const *> last = tm.last();
 581         for (pit_type pit = first.first; pit <= last.first; ++pit) {
 582                 d->par_height_[pit] = tm.parMetrics(pit).height();
 583                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
 584                         << d->par_height_[pit]);
 585         }
 586
 587         int top_pos = first.second->position() - first.second->ascent();
 588         int bottom_pos = last.second->position() + last.second->descent();
 589         bool first_visible = first.first == 0 && top_pos >= 0;
 590         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
 591         if (first_visible && last_visible) {
 592                 d->scrollbarParameters_.min = 0;
 593                 d->scrollbarParameters_.max = 0;
 594                 return;
 595         }
 596
 597         d->scrollbarParameters_.min = top_pos;
 598         for (size_t i = 0; i != size_t(first.first); ++i)
 599                 d->scrollbarParameters_.min -= d->par_height_[i];
 600         d->scrollbarParameters_.max = bottom_pos;
 601         for (size_t i = last.first + 1; i != parsize; ++i)
 602                 d->scrollbarParameters_.max += d->par_height_[i];
 603
 604         // The reference is the top position so we remove one page.
 605         if (lyxrc.scroll_below_document)
 606                 d->scrollbarParameters_.max -= minVisiblePart();
 607         else
 608                 d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 609
 610         // 0 must be inside the range as it denotes the current position
 611         if (d->scrollbarParameters_.max < 0)
 612                 d->scrollbarParameters_.max = 0;
 613         if (d->scrollbarParameters_.min > 0)
 614                 d->scrollbarParameters_.min = 0;
 615 }
 616
 617
 618 ScrollbarParameters const & BufferView::scrollbarParameters() const
 619 {
 620         return d->scrollbarParameters_;
 621 }
 622
 623
 624 docstring BufferView::toolTip(int x, int y) const
 625 {
 626         // Get inset under mouse, if there is one.
 627         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 628         if (!covering_inset)
 629                 // No inset, no tooltip...
 630                 return docstring();
 631         return covering_inset->toolTip(*this, x, y);
 632 }
 633
 634
 635 string BufferView::contextMenu(int x, int y) const
 636 {
 637         //If there is a selection, return the containing inset menu
 638         if (d->cursor_.selection())
 639                 return d->cursor_.inset().contextMenu(*this, x, y);
 640
 641         // Get inset under mouse, if there is one.
 642         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 643         if (covering_inset)
 644                 return covering_inset->contextMenu(*this, x, y);
 645
 646         return buffer_.inset().contextMenu(*this, x, y);
 647 }
 648
 649
 650
 651 void BufferView::scrollDocView(int const value, bool update)
 652 {
 653         // The scrollbar values are relative to the top of the screen, therefore the
 654         // offset is equal to the target value.
 655
 656         // No scrolling at all? No need to redraw anything
 657         if (value == 0)
 658                 return;
 659
 660         // If the offset is less than 2 screen height, prefer to scroll instead.
 661         if (abs(value) <= 2 * height_) {
 662                 d->anchor_ypos_ -= value;
 663                 processUpdateFlags(Update::Force);
 664                 return;
 665         }
 666
 667         // cut off at the top
 668         if (value <= d->scrollbarParameters_.min) {
 669                 DocIterator dit = doc_iterator_begin(&buffer_);
 670                 showCursor(dit, false, update);
 671                 LYXERR(Debug::SCROLLING, "scroll to top");
 672                 return;
 673         }
 674
 675         // cut off at the bottom
 676         if (value >= d->scrollbarParameters_.max) {
 677                 DocIterator dit = doc_iterator_end(&buffer_);
 678                 dit.backwardPos();
 679                 showCursor(dit, false, update);
 680                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 681                 return;
 682         }
 683
 684         // find paragraph at target position
 685         int par_pos = d->scrollbarParameters_.min;
 686         pit_type i = 0;
 687         for (; i != int(d->par_height_.size()); ++i) {
 688                 par_pos += d->par_height_[i];
 689                 if (par_pos >= value)
 690                         break;
 691         }
 692
 693         if (par_pos < value) {
 694                 // It seems we didn't find the correct pit so stay on the safe side and
 695                 // scroll to bottom.
 696                 LYXERR0("scrolling position not found!");
 697                 scrollDocView(d->scrollbarParameters_.max, update);
 698                 return;
 699         }
 700
 701         DocIterator dit = doc_iterator_begin(&buffer_);
 702         dit.pit() = i;
 703         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 704         showCursor(dit, false, update);
 705 }
 706
 707
 708 // FIXME: this method is not working well.
 709 void BufferView::setCursorFromScrollbar()
 710 {
 711         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 712
 713         int const height = 2 * defaultRowHeight();
 714         int const first = height;
 715         int const last = height_ - height;
 716         int newy = 0;
 717         Cursor const & oldcur = d->cursor_;
 718
 719         switch (cursorStatus(oldcur)) {
 720         case CUR_ABOVE:
 721                 newy = first;
 722                 break;
 723         case CUR_BELOW:
 724                 newy = last;
 725                 break;
 726         case CUR_INSIDE:
 727                 int const y = getPos(oldcur).y_;
 728                 newy = min(last, max(y, first));
 729                 if (y == newy)
 730                         return;
 731         }
 732         // We reset the cursor because cursorStatus() does not
 733         // work when the cursor is within mathed.
 734         Cursor cur(*this);
 735         cur.reset();
 736         tm.setCursorFromCoordinates(cur, 0, newy);
 737
 738         // update the bufferview cursor and notify insets
 739         // FIXME: Care about the d->cursor_ flags to redraw if needed
 740         Cursor old = d->cursor_;
 741         mouseSetCursor(cur);
 742         // the DEPM call in mouseSetCursor() might have destroyed the
 743         // paragraph the cursor is in.
 744         bool badcursor = old.fixIfBroken();
 745         badcursor |= notifyCursorLeavesOrEnters(old, d->cursor_);
 746         if (badcursor)
 747                 d->cursor_.fixIfBroken();
 748 }
 749
 750
 751 Change const BufferView::getCurrentChange() const
 752 {
 753         if (!d->cursor_.selection())
 754                 return Change(Change::UNCHANGED);
 755
 756         DocIterator dit = d->cursor_.selectionBegin();
 757         // The selected content might have been changed (see #7685)
 758         dit = dit.getInnerText();
 759         return dit.paragraph().lookupChange(dit.pos());
 760 }
 761
 762
 763 // this could be used elsewhere as well?
 764 // FIXME: This does not work within mathed!
 765 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 766 {
 767         Point const p = getPos(dit);
 768         if (p.y_ < 0)
 769                 return CUR_ABOVE;
 770         if (p.y_ > workHeight())
 771                 return CUR_BELOW;
 772         return CUR_INSIDE;
 773 }
 774
 775
 776 void BufferView::bookmarkEditPosition()
 777 {
 778         // Don't eat cpu time for each keystroke
 779         if (d->cursor_.paragraph().id() == d->bookmark_edit_position_)
 780                 return;
 781         saveBookmark(0);
 782         d->bookmark_edit_position_ = d->cursor_.paragraph().id();
 783 }
 784
 785
 786 void BufferView::saveBookmark(unsigned int idx)
 787 {
 788         // tentatively save bookmark, id and pos will be used to
 789         // acturately locate a bookmark in a 'live' lyx session.
 790         // pit and pos will be updated with bottom level pit/pos
 791         // when lyx exits.
 792         if (!buffer_.isInternal()) {
 793                 theSession().bookmarks().save(
 794                         buffer_.fileName(),
 795                         d->cursor_.bottom().pit(),
 796                         d->cursor_.bottom().pos(),
 797                         d->cursor_.paragraph().id(),
 798                         d->cursor_.pos(),
 799                         idx
 800                         );
 801                 if (idx)
 802                         // emit message signal.
 803                         message(_("Save bookmark"));
 804         }
 805 }
 806
 807
 808 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 809         int top_id, pos_type top_pos)
 810 {
 811         bool success = false;
 812         DocIterator dit;
 813
 814         d->cursor_.clearSelection();
 815
 816         // if a valid par_id is given, try it first
 817         // This is the case for a 'live' bookmark when unique paragraph ID
 818         // is used to track bookmarks.
 819         if (top_id > 0) {
 820                 dit = buffer_.getParFromID(top_id);
 821                 if (!dit.atEnd()) {
 822                         dit.pos() = min(dit.paragraph().size(), top_pos);
 823                         // Some slices of the iterator may not be
 824                         // reachable (e.g. closed collapsible inset)
 825                         // so the dociterator may need to be
 826                         // shortened. Otherwise, setCursor may crash
 827                         // lyx when the cursor can not be set to these
 828                         // insets.
 829                         size_t const n = dit.depth();
 830                         for (size_t i = 0; i < n; ++i)
 831                                 if (!dit[i].inset().editable()) {
 832                                         dit.resize(i);
 833                                         break;
 834                                 }
 835                         success = true;
 836                 }
 837         }
 838
 839         // if top_id == 0, or searching through top_id failed
 840         // This is the case for a 'restored' bookmark when only bottom
 841         // (document level) pit was saved. Because of this, bookmark
 842         // restoration is inaccurate. If a bookmark was within an inset,
 843         // it will be restored to the left of the outmost inset that contains
 844         // the bookmark.
 845         if (bottom_pit < int(buffer_.paragraphs().size())) {
 846                 dit = doc_iterator_begin(&buffer_);
 847
 848                 dit.pit() = bottom_pit;
 849                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 850                 success = true;
 851         }
 852
 853         if (success) {
 854                 // Note: only bottom (document) level pit is set.
 855                 setCursor(dit);
 856                 // set the current font.
 857                 d->cursor_.setCurrentFont();
 858                 // Do not forget to reset the anchor (see #9912)
 859                 d->cursor_.resetAnchor();
 860                 processUpdateFlags(Update::FitCursor);
 861         }
 862
 863         return success;
 864 }
 865
 866
 867 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 868 {
 869         if (d->cursor_.real_current_font.isRightToLeft()) {
 870                 if (d->intl_.keymap == Intl::PRIMARY)
 871                         d->intl_.keyMapSec();
 872         } else {
 873                 if (d->intl_.keymap == Intl::SECONDARY)
 874                         d->intl_.keyMapPrim();
 875         }
 876
 877         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 878 }
 879
 880
 881 int BufferView::workWidth() const
 882 {
 883         return width_;
 884 }
 885
 886
 887 void BufferView::recenter()
 888 {
 889         showCursor(d->cursor_, true, true);
 890 }
 891
 892
 893 void BufferView::showCursor()
 894 {
 895         showCursor(d->cursor_, false, true);
 896 }
 897
 898
 899 void BufferView::showCursor(DocIterator const & dit,
 900         bool recenter, bool update)
 901 {
 902         if (scrollToCursor(dit, recenter) && update)
 903                 processUpdateFlags(Update::Force);
 904 }
 905
 906
 907 void BufferView::scrollToCursor()
 908 {
 909         if (scrollToCursor(d->cursor_, false))
 910                 processUpdateFlags(Update::Force);
 911 }
 912
 913
 914 bool BufferView::scrollToCursor(DocIterator const & dit, bool const recenter)
 915 {
 916         // We are not properly started yet, delay until resizing is
 917         // done.
 918         if (height_ == 0)
 919                 return false;
 920
 921         LYXERR(Debug::SCROLLING, "recentering!");
 922
 923         CursorSlice const & bot = dit.bottom();
 924         TextMetrics & tm = d->text_metrics_[bot.text()];
 925
 926         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 927         int bot_pit = bot.pit();
 928         if (bot_pit > max_pit) {
 929                 // FIXME: Why does this happen?
 930                 LYXERR0("bottom pit is greater that max pit: "
 931                         << bot_pit << " > " << max_pit);
 932                 bot_pit = max_pit;
 933         }
 934
 935         if (bot_pit == tm.first().first - 1)
 936                 tm.newParMetricsUp();
 937         else if (bot_pit == tm.last().first + 1)
 938                 tm.newParMetricsDown();
 939
 940         if (tm.contains(bot_pit)) {
 941                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 942                 LBUFERR(!pm.rows().empty());
 943                 // FIXME: smooth scrolling doesn't work in mathed.
 944                 CursorSlice const & cs = dit.innerTextSlice();
 945                 int offset = coordOffset(dit).y_;
 946                 int ypos = pm.position() + offset;
 947                 Dimension const & row_dim =
 948                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 949                 int scrolled = 0;
 950                 if (recenter)
 951                         scrolled = scroll(ypos - height_/2);
 952
 953                 // We try to visualize the whole row, if the row height is larger than
 954                 // the screen height, we scroll to a heuristic value of height_ / 4.
 955                 // FIXME: This heuristic value should be replaced by a recursive search
 956                 // for a row in the inset that can be visualized completely.
 957                 else if (row_dim.height() > height_) {
 958                         if (ypos < defaultRowHeight())
 959                                 scrolled = scroll(ypos - height_ / 4);
 960                         else if (ypos > height_ - defaultRowHeight())
 961                                 scrolled = scroll(ypos - 3 * height_ / 4);
 962                 }
 963
 964                 // If the top part of the row falls of the screen, we scroll
 965                 // up to align the top of the row with the top of the screen.
 966                 else if (ypos - row_dim.ascent() < 0 && ypos < height_) {
 967                         int ynew = row_dim.ascent();
 968                         scrolled = scrollUp(ynew - ypos);
 969                 }
 970
 971                 // If the bottom of the row falls of the screen, we scroll down.
 972                 else if (ypos + row_dim.descent() > height_ && ypos > 0) {
 973                         int ynew = height_ - row_dim.descent();
 974                         scrolled = scrollDown(ypos - ynew);
 975                 }
 976
 977                 // else, nothing to do, the cursor is already visible so we just return.
 978                 return scrolled != 0;
 979         }
 980
 981         // fix inline completion position
 982         if (d->inlineCompletionPos_.fixIfBroken())
 983                 d->inlineCompletionPos_ = DocIterator();
 984
 985         tm.redoParagraph(bot_pit);
 986         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 987         int offset = coordOffset(dit).y_;
 988
 989         d->anchor_pit_ = bot_pit;
 990         CursorSlice const & cs = dit.innerTextSlice();
 991         Dimension const & row_dim =
 992                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 993
 994         if (recenter)
 995                 d->anchor_ypos_ = height_/2;
 996         else if (d->anchor_pit_ == 0)
 997                 d->anchor_ypos_ = offset + pm.ascent();
 998         else if (d->anchor_pit_ == max_pit)
 999                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
1000         else if (offset > height_)
1001                 d->anchor_ypos_ = height_ - offset - defaultRowHeight();
1002         else
1003                 d->anchor_ypos_ = defaultRowHeight() * 2;
1004
1005         return true;
1006 }
1007
1008
1009 void BufferView::makeDocumentClass()
1010 {
1011         DocumentClassConstPtr olddc = buffer_.params().documentClassPtr();
1012         buffer_.params().makeDocumentClass();
1013         updateDocumentClass(olddc);
1014 }
1015
1016
1017 void BufferView::updateDocumentClass(DocumentClassConstPtr olddc)
1018 {
1019         message(_("Converting document to new document class..."));
1020
1021         StableDocIterator backcur(d->cursor_);
1022         ErrorList & el = buffer_.errorList("Class Switch");
1023         cap::switchBetweenClasses(
1024                         olddc, buffer_.params().documentClassPtr(),
1025                         static_cast<InsetText &>(buffer_.inset()), el);
1026
1027         setCursor(backcur.asDocIterator(&buffer_));
1028
1029         buffer_.errors("Class Switch");
1030 }
1031
1032
1033 /** Return the change status at cursor position, taking into account the
1034  * status at each level of the document iterator (a table in a deleted
1035  * footnote is deleted).
1036  * When \param outer is true, the top slice is not looked at.
1037  */
1038 static Change::Type lookupChangeType(DocIterator const & dit, bool outer = false)
1039 {
1040         size_t const depth = dit.depth() - (outer ? 1 : 0);
1041
1042         for (size_t i = 0 ; i < depth ; ++i) {
1043                 CursorSlice const & slice = dit[i];
1044                 if (!slice.inset().inMathed()
1045                     && slice.pos() < slice.paragraph().size()) {
1046                         Change::Type const ch = slice.paragraph().lookupChange(slice.pos()).type;
1047                         if (ch != Change::UNCHANGED)
1048                                 return ch;
1049                 }
1050         }
1051         return Change::UNCHANGED;
1052 }
1053
1054
1055 bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
1056 {
1057         FuncCode const act = cmd.action();
1058
1059         // Can we use a readonly buffer?
1060         if (buffer_.isReadonly()
1061             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
1062             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
1063                 if (buffer_.hasReadonlyFlag())
1064                         flag.message(from_utf8(N_("Document is read-only")));
1065                 else
1066                         flag.message(from_utf8(N_("Document has been modified externally")));
1067                 flag.setEnabled(false);
1068                 return true;
1069         }
1070
1071         // Are we in a DELETED change-tracking region?
1072         if (lookupChangeType(d->cursor_, true) == Change::DELETED
1073             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
1074             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
1075                 flag.message(from_utf8(N_("This portion of the document is deleted.")));
1076                 flag.setEnabled(false);
1077                 return true;
1078         }
1079
1080         Cursor & cur = d->cursor_;
1081
1082         if (cur.getStatus(cmd, flag))
1083                 return true;
1084
1085         switch (act) {
1086
1087         // FIXME: This is a bit problematic because we don't check if this is
1088         // a document BufferView or not for these LFUNs. We probably have to
1089         // dispatch both to currentBufferView() and, if that fails,
1090         // to documentBufferView(); same as we do now for current Buffer and
1091         // document Buffer. Ideally those LFUN should go to Buffer as they
1092         // operate on the full Buffer and the cursor is only needed either for
1093         // an Undo record or to restore a cursor position. But we don't know
1094         // how to do that inside Buffer of course.
1095         case LFUN_BUFFER_PARAMS_APPLY:
1096         case LFUN_LAYOUT_MODULES_CLEAR:
1097         case LFUN_LAYOUT_MODULE_ADD:
1098         case LFUN_LAYOUT_RELOAD:
1099         case LFUN_TEXTCLASS_APPLY:
1100         case LFUN_TEXTCLASS_LOAD:
1101                 flag.setEnabled(!buffer_.isReadonly());
1102                 break;
1103
1104         case LFUN_UNDO:
1105                 // We do not use the LyXAction flag for readonly because Undo sets the
1106                 // buffer clean/dirty status by itself.
1107                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasUndoStack());
1108                 break;
1109         case LFUN_REDO:
1110                 // We do not use the LyXAction flag for readonly because Redo sets the
1111                 // buffer clean/dirty status by itself.
1112                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasRedoStack());
1113                 break;
1114         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
1115         case LFUN_FILE_INSERT_PLAINTEXT: {
1116                 docstring const fname = cmd.argument();
1117                 if (!FileName::isAbsolute(to_utf8(fname))) {
1118                         flag.message(_("Absolute filename expected."));
1119                         return false;
1120                 }
1121                 flag.setEnabled(cur.inTexted());
1122                 break;
1123         }
1124         case LFUN_FILE_INSERT:
1125         case LFUN_BOOKMARK_SAVE:
1126                 // FIXME: Actually, these LFUNS should be moved to Text
1127                 flag.setEnabled(cur.inTexted());
1128                 break;
1129
1130         case LFUN_FONT_STATE:
1131         case LFUN_LABEL_INSERT:
1132         case LFUN_INFO_INSERT:
1133         case LFUN_PARAGRAPH_GOTO:
1134         case LFUN_NOTE_NEXT:
1135         case LFUN_REFERENCE_NEXT:
1136         case LFUN_WORD_FIND:
1137         case LFUN_WORD_FIND_FORWARD:
1138         case LFUN_WORD_FIND_BACKWARD:
1139         case LFUN_WORD_REPLACE:
1140         case LFUN_MARK_OFF:
1141         case LFUN_MARK_ON:
1142         case LFUN_MARK_TOGGLE:
1143         case LFUN_SCREEN_RECENTER:
1144         case LFUN_SCREEN_SHOW_CURSOR:
1145         case LFUN_BIBTEX_DATABASE_ADD:
1146         case LFUN_BIBTEX_DATABASE_DEL:
1147         case LFUN_STATISTICS:
1148         case LFUN_KEYMAP_OFF:
1149         case LFUN_KEYMAP_PRIMARY:
1150         case LFUN_KEYMAP_SECONDARY:
1151         case LFUN_KEYMAP_TOGGLE:
1152         case LFUN_INSET_SELECT_ALL:
1153                 flag.setEnabled(true);
1154                 break;
1155
1156         case LFUN_GRAPHICS_UNIFY:
1157                 flag.setEnabled(cur.countInsetsInSelection(GRAPHICS_CODE)>1);
1158                 break;
1159
1160         case LFUN_WORD_FINDADV: {
1161                 FindAndReplaceOptions opt;
1162                 istringstream iss(to_utf8(cmd.argument()));
1163                 iss >> opt;
1164                 flag.setEnabled(opt.repl_buf_name.empty()
1165                                 || !buffer_.isReadonly());
1166                 break;
1167         }
1168
1169         case LFUN_LABEL_GOTO:
1170                 flag.setEnabled(!cmd.argument().empty()
1171                     || getInsetByCode<InsetRef>(cur, REF_CODE));
1172                 break;
1173
1174         case LFUN_CHANGES_MERGE:
1175         case LFUN_CHANGE_NEXT:
1176         case LFUN_CHANGE_PREVIOUS:
1177         case LFUN_ALL_CHANGES_ACCEPT:
1178         case LFUN_ALL_CHANGES_REJECT:
1179                 flag.setEnabled(buffer_.areChangesPresent());
1180                 break;
1181
1182         case LFUN_SCREEN_UP:
1183         case LFUN_SCREEN_DOWN:
1184         case LFUN_SCROLL:
1185         case LFUN_SCREEN_UP_SELECT:
1186         case LFUN_SCREEN_DOWN_SELECT:
1187         case LFUN_INSET_FORALL:
1188                 flag.setEnabled(true);
1189                 break;
1190
1191         case LFUN_LAYOUT_TABULAR:
1192                 flag.setEnabled(cur.innerInsetOfType(TABULAR_CODE));
1193                 break;
1194
1195         case LFUN_LAYOUT:
1196                 flag.setEnabled(!cur.inset().forcePlainLayout(cur.idx()));
1197                 break;
1198
1199         case LFUN_LAYOUT_PARAGRAPH:
1200                 flag.setEnabled(cur.inset().allowParagraphCustomization(cur.idx()));
1201                 break;
1202
1203         case LFUN_BRANCH_ADD_INSERT:
1204                 flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
1205                 break;
1206
1207         case LFUN_DIALOG_SHOW_NEW_INSET:
1208                 // FIXME: this is wrong, but I do not understand the
1209                 // intent (JMarc)
1210                 if (cur.inset().lyxCode() == CAPTION_CODE)
1211                         return cur.inset().getStatus(cur, cmd, flag);
1212                 // FIXME we should consider passthru paragraphs too.
1213                 flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
1214                 break;
1215
1216         case LFUN_CITATION_INSERT: {
1217                 FuncRequest fr(LFUN_INSET_INSERT, "citation");
1218                 // FIXME: This could turn in a recursive hell.
1219                 // Shouldn't we use Buffer::getStatus() instead?
1220                 flag.setEnabled(lyx::getStatus(fr).enabled());
1221                 break;
1222         }
1223         case LFUN_INSET_APPLY: {
1224                 string const name = cmd.getArg(0);
1225                 Inset * inset = editedInset(name);
1226                 if (inset) {
1227                         FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1228                         if (!inset->getStatus(cur, fr, flag)) {
1229                                 // Every inset is supposed to handle this
1230                                 LASSERT(false, break);
1231                         }
1232                 } else {
1233                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1234                         flag = lyx::getStatus(fr);
1235                 }
1236                 break;
1237         }
1238
1239         default:
1240                 return false;
1241         }
1242
1243         return true;
1244 }
1245
1246
1247 Inset * BufferView::editedInset(string const & name) const
1248 {
1249         map<string, Inset *>::const_iterator it = d->edited_insets_.find(name);
1250         return it == d->edited_insets_.end() ? 0 : it->second;
1251 }
1252
1253
1254 void BufferView::editInset(string const & name, Inset * inset)
1255 {
1256         d->edited_insets_[name] = inset;
1257 }
1258
1259
1260 void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
1261 {
1262         LYXERR(Debug::ACTION, "BufferView::dispatch: cmd: " << cmd);
1263
1264         string const argument = to_utf8(cmd.argument());
1265         Cursor & cur = d->cursor_;
1266         Cursor old = cur;
1267
1268         // Don't dispatch function that does not apply to internal buffers.
1269         if (buffer_.isInternal()
1270             && lyxaction.funcHasFlag(cmd.action(), LyXAction::NoInternal))
1271                 return;
1272
1273         // We'll set this back to false if need be.
1274         bool dispatched = true;
1275         buffer_.undo().beginUndoGroup();
1276
1277         FuncCode const act = cmd.action();
1278         switch (act) {
1279
1280         case LFUN_BUFFER_PARAMS_APPLY: {
1281                 DocumentClassConstPtr olddc = buffer_.params().documentClassPtr();
1282                 cur.recordUndoBufferParams();
1283                 istringstream ss(to_utf8(cmd.argument()));
1284                 Lexer lex;
1285                 lex.setStream(ss);
1286                 int const unknown_tokens = buffer_.readHeader(lex);
1287                 if (unknown_tokens != 0) {
1288                         LYXERR0("Warning in LFUN_BUFFER_PARAMS_APPLY!\n"
1289                                                 << unknown_tokens << " unknown token"
1290                                                 << (unknown_tokens == 1 ? "" : "s"));
1291                 }
1292                 updateDocumentClass(olddc);
1293
1294                 // We are most certainly here because of a change in the document
1295                 // It is then better to make sure that all dialogs are in sync with
1296                 // current document settings.
1297                 dr.screenUpdate(Update::Force | Update::FitCursor);
1298                 dr.forceBufferUpdate();
1299                 break;
1300         }
1301
1302         case LFUN_LAYOUT_MODULES_CLEAR: {
1303                 // FIXME: this modifies the document in cap::switchBetweenClasses
1304                 //  without calling recordUndo. Fix this before using
1305                 //  recordUndoBufferParams().
1306                 cur.recordUndoFullBuffer();
1307                 buffer_.params().clearLayoutModules();
1308                 makeDocumentClass();
1309                 dr.screenUpdate(Update::Force);
1310                 dr.forceBufferUpdate();
1311                 break;
1312         }
1313
1314         case LFUN_LAYOUT_MODULE_ADD: {
1315                 BufferParams const & params = buffer_.params();
1316                 if (!params.layoutModuleCanBeAdded(argument)) {
1317                         LYXERR0("Module `" << argument <<
1318                                 "' cannot be added due to failed requirements or "
1319                                 "conflicts with installed modules.");
1320                         break;
1321                 }
1322                 // FIXME: this modifies the document in cap::switchBetweenClasses
1323                 //  without calling recordUndo. Fix this before using
1324                 //  recordUndoBufferParams().
1325                 cur.recordUndoFullBuffer();
1326                 buffer_.params().addLayoutModule(argument);
1327                 makeDocumentClass();
1328                 dr.screenUpdate(Update::Force);
1329                 dr.forceBufferUpdate();
1330                 break;
1331         }
1332
1333         case LFUN_TEXTCLASS_APPLY: {
1334                 // since this shortcircuits, the second call is made only if
1335                 // the first fails
1336                 bool const success =
1337                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1338                         LayoutFileList::get().load(argument, buffer_.filePath());
1339                 if (!success) {
1340                         docstring s = bformat(_("The document class `%1$s' "
1341                                                  "could not be loaded."), from_utf8(argument));
1342                         frontend::Alert::error(_("Could not load class"), s);
1343                         break;
1344                 }
1345
1346                 LayoutFile const * old_layout = buffer_.params().baseClass();
1347                 LayoutFile const * new_layout = &(LayoutFileList::get()[argument]);
1348
1349                 if (old_layout == new_layout)
1350                         // nothing to do
1351                         break;
1352
1353                 // Save the old, possibly modular, layout for use in conversion.
1354                 // FIXME: this modifies the document in cap::switchBetweenClasses
1355                 //  without calling recordUndo. Fix this before using
1356                 //  recordUndoBufferParams().
1357                 cur.recordUndoFullBuffer();
1358                 buffer_.params().setBaseClass(argument);
1359                 makeDocumentClass();
1360                 dr.screenUpdate(Update::Force);
1361                 dr.forceBufferUpdate();
1362                 break;
1363         }
1364
1365         case LFUN_TEXTCLASS_LOAD: {
1366                 // since this shortcircuits, the second call is made only if
1367                 // the first fails
1368                 bool const success =
1369                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1370                         LayoutFileList::get().load(argument, buffer_.filePath());
1371                 if (!success) {
1372                         docstring s = bformat(_("The document class `%1$s' "
1373                                                  "could not be loaded."), from_utf8(argument));
1374                         frontend::Alert::error(_("Could not load class"), s);
1375                 }
1376                 break;
1377         }
1378
1379         case LFUN_LAYOUT_RELOAD: {
1380                 LayoutFileIndex bc = buffer_.params().baseClassID();
1381                 LayoutFileList::get().reset(bc);
1382                 buffer_.params().setBaseClass(bc);
1383                 makeDocumentClass();
1384                 dr.screenUpdate(Update::Force);
1385                 dr.forceBufferUpdate();
1386                 break;
1387         }
1388
1389         case LFUN_UNDO: {
1390                 dr.setMessage(_("Undo"));
1391                 cur.clearSelection();
1392                 // We need to find out if the bibliography information
1393                 // has changed. See bug #11055.
1394                 // So these should not be references...
1395                 LayoutModuleList const engines = buffer().params().citeEngine();
1396                 CiteEngineType const enginetype = buffer().params().citeEngineType();
1397                 if (!cur.textUndo())
1398                         dr.setMessage(_("No further undo information"));
1399                 else {
1400                         dr.screenUpdate(Update::Force | Update::FitCursor);
1401                         dr.forceBufferUpdate();
1402                         if (buffer().params().citeEngine() != engines ||
1403                             buffer().params().citeEngineType() != enginetype)
1404                                 buffer().invalidateCiteLabels();
1405                 }
1406                 break;
1407         }
1408
1409         case LFUN_REDO: {
1410                 dr.setMessage(_("Redo"));
1411                 cur.clearSelection();
1412                 // We need to find out if the bibliography information
1413                 // has changed. See bug #11055.
1414                 // So these should not be references...
1415                 LayoutModuleList const engines = buffer().params().citeEngine();
1416                 CiteEngineType const enginetype = buffer().params().citeEngineType();
1417                 if (!cur.textRedo())
1418                         dr.setMessage(_("No further redo information"));
1419                 else {
1420                         dr.screenUpdate(Update::Force | Update::FitCursor);
1421                         dr.forceBufferUpdate();
1422                         if (buffer().params().citeEngine() != engines ||
1423                             buffer().params().citeEngineType() != enginetype)
1424                                 buffer().invalidateCiteLabels();
1425                 }
1426                 break;
1427         }
1428
1429         case LFUN_FONT_STATE:
1430                 dr.setMessage(cur.currentState(false));
1431                 break;
1432
1433         case LFUN_BOOKMARK_SAVE:
1434                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1435                 break;
1436
1437         case LFUN_LABEL_GOTO: {
1438                 docstring label = cmd.argument();
1439                 if (label.empty()) {
1440                         InsetRef * inset =
1441                                 getInsetByCode<InsetRef>(cur, REF_CODE);
1442                         if (inset) {
1443                                 label = inset->getParam("reference");
1444                                 // persistent=false: use temp_bookmark
1445                                 saveBookmark(0);
1446                         }
1447                 }
1448                 if (!label.empty()) {
1449                         gotoLabel(label);
1450                         // at the moment, this is redundant, since gotoLabel will
1451                         // eventually call LFUN_PARAGRAPH_GOTO, but it seems best
1452                         // to have it here.
1453                         dr.screenUpdate(Update::Force | Update::FitCursor);
1454                 }
1455                 break;
1456         }
1457
1458         case LFUN_PARAGRAPH_GOTO: {
1459                 int const id = convert<int>(cmd.getArg(0));
1460                 pos_type const pos = convert<int>(cmd.getArg(1));
1461                 if (id < 0)
1462                         break;
1463                 string const str_id_end = cmd.getArg(2);
1464                 string const str_pos_end = cmd.getArg(3);
1465                 int i = 0;
1466                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1467                         b = theBufferList().next(b)) {
1468
1469                         Cursor curs(*this);
1470                         curs.setCursor(b->getParFromID(id));
1471                         if (curs.atEnd()) {
1472                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1473                                 ++i;
1474                                 continue;
1475                         }
1476                         LYXERR(Debug::INFO, "Paragraph " << curs.paragraph().id()
1477                                 << " found in buffer `"
1478                                 << b->absFileName() << "'.");
1479
1480                         if (b == &buffer_) {
1481                                 bool success;
1482                                 if (str_id_end.empty() || str_pos_end.empty()) {
1483                                         // Set the cursor
1484                                         curs.pos() = pos;
1485                                         mouseSetCursor(curs);
1486                                         success = true;
1487                                 } else {
1488                                         int const id_end = convert<int>(str_id_end);
1489                                         pos_type const pos_end = convert<int>(str_pos_end);
1490                                         success = setCursorFromEntries({id, pos},
1491                                                                        {id_end, pos_end});
1492                                 }
1493                                 if (success)
1494                                         dr.screenUpdate(Update::Force | Update::FitCursor);
1495                         } else {
1496                                 // Switch to other buffer view and resend cmd
1497                                 lyx::dispatch(FuncRequest(
1498                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1499                                 lyx::dispatch(cmd);
1500                         }
1501                         break;
1502                 }
1503                 break;
1504         }
1505
1506         case LFUN_NOTE_NEXT:
1507                 gotoInset(this, NOTE_CODE, false);
1508                 break;
1509
1510         case LFUN_REFERENCE_NEXT: {
1511                 vector<InsetCode> tmp;
1512                 tmp.push_back(LABEL_CODE);
1513                 tmp.push_back(REF_CODE);
1514                 gotoInset(this, tmp, true);
1515                 break;
1516         }
1517
1518         case LFUN_CHANGE_NEXT:
1519                 findNextChange(this);
1520                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1521                 dr.screenUpdate(Update::Force | Update::FitCursor);
1522                 break;
1523
1524         case LFUN_CHANGE_PREVIOUS:
1525                 findPreviousChange(this);
1526                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1527                 dr.screenUpdate(Update::Force | Update::FitCursor);
1528                 break;
1529
1530         case LFUN_CHANGES_MERGE:
1531                 if (findNextChange(this) || findPreviousChange(this)) {
1532                         dr.screenUpdate(Update::Force | Update::FitCursor);
1533                         dr.forceBufferUpdate();
1534                         showDialog("changes");
1535                 }
1536                 break;
1537
1538         case LFUN_ALL_CHANGES_ACCEPT:
1539                 // select complete document
1540                 cur.reset();
1541                 cur.selHandle(true);
1542                 buffer_.text().cursorBottom(cur);
1543                 // accept everything in a single step to support atomic undo
1544                 buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
1545                 cur.resetAnchor();
1546                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1547                 dr.screenUpdate(Update::Force | Update::FitCursor);
1548                 dr.forceBufferUpdate();
1549                 break;
1550
1551         case LFUN_ALL_CHANGES_REJECT:
1552                 // select complete document
1553                 cur.reset();
1554                 cur.selHandle(true);
1555                 buffer_.text().cursorBottom(cur);
1556                 // reject everything in a single step to support atomic undo
1557                 // Note: reject does not work recursively; the user may have to repeat the operation
1558                 buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
1559                 cur.resetAnchor();
1560                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1561                 dr.screenUpdate(Update::Force | Update::FitCursor);
1562                 dr.forceBufferUpdate();
1563                 break;
1564
1565         case LFUN_WORD_FIND_FORWARD:
1566         case LFUN_WORD_FIND_BACKWARD: {
1567                 // FIXME THREAD
1568                 // Would it maybe be better if this variable were view specific anyway?
1569                 static docstring last_search;
1570                 docstring searched_string;
1571
1572                 if (!cmd.argument().empty()) {
1573                         last_search = cmd.argument();
1574                         searched_string = cmd.argument();
1575                 } else {
1576                         searched_string = last_search;
1577                 }
1578
1579                 if (searched_string.empty())
1580                         break;
1581
1582                 bool const fw = act == LFUN_WORD_FIND_FORWARD;
1583                 docstring const data =
1584                         find2string(searched_string, true, false, fw);
1585                 bool found = lyxfind(this, FuncRequest(LFUN_WORD_FIND, data));
1586                 if (found)
1587                         dr.screenUpdate(Update::Force | Update::FitCursor);
1588                 break;
1589         }
1590
1591         case LFUN_WORD_FIND: {
1592                 FuncRequest req = cmd;
1593                 if (cmd.argument().empty() && !d->search_request_cache_.argument().empty())
1594                         req = d->search_request_cache_;
1595                 if (req.argument().empty()) {
1596                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
1597                         break;
1598                 }
1599                 if (lyxfind(this, req))
1600                         dr.screenUpdate(Update::Force | Update::FitCursor);
1601
1602                 d->search_request_cache_ = req;
1603                 break;
1604         }
1605
1606         case LFUN_WORD_REPLACE: {
1607                 bool has_deleted = false;
1608                 if (cur.selection()) {
1609                         DocIterator beg = cur.selectionBegin();
1610                         DocIterator end = cur.selectionEnd();
1611                         if (beg.pit() == end.pit()) {
1612                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1613                                         if (!cur.inMathed() && cur.paragraph().isDeleted(p)) {
1614                                                 has_deleted = true;
1615                                                 break;
1616                                         }
1617                                 }
1618                         }
1619                 }
1620                 if (lyxreplace(this, cmd, has_deleted)) {
1621                         dr.forceBufferUpdate();
1622                         dr.screenUpdate(Update::Force | Update::FitCursor);
1623                 }
1624                 break;
1625         }
1626
1627         case LFUN_WORD_FINDADV: {
1628                 FindAndReplaceOptions opt;
1629                 istringstream iss(to_utf8(cmd.argument()));
1630                 iss >> opt;
1631                 if (findAdv(this, opt)) {
1632                         dr.screenUpdate(Update::Force | Update::FitCursor);
1633                         cur.dispatched();
1634                         dispatched = true;
1635                 } else {
1636                         cur.undispatched();
1637                         dispatched = false;
1638                 }
1639                 break;
1640         }
1641
1642         case LFUN_MARK_OFF:
1643                 cur.clearSelection();
1644                 dr.setMessage(from_utf8(N_("Mark off")));
1645                 break;
1646
1647         case LFUN_MARK_ON:
1648                 cur.clearSelection();
1649                 cur.setMark(true);
1650                 dr.setMessage(from_utf8(N_("Mark on")));
1651                 break;
1652
1653         case LFUN_MARK_TOGGLE:
1654                 cur.selection(false);
1655                 if (cur.mark()) {
1656                         cur.setMark(false);
1657                         dr.setMessage(from_utf8(N_("Mark removed")));
1658                 } else {
1659                         cur.setMark(true);
1660                         dr.setMessage(from_utf8(N_("Mark set")));
1661                 }
1662                 cur.resetAnchor();
1663                 break;
1664
1665         case LFUN_SCREEN_SHOW_CURSOR:
1666                 showCursor();
1667                 break;
1668
1669         case LFUN_SCREEN_RECENTER:
1670                 recenter();
1671                 break;
1672
1673         case LFUN_BIBTEX_DATABASE_ADD: {
1674                 Cursor tmpcur = cur;
1675                 findInset(tmpcur, BIBTEX_CODE, false);
1676                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1677                                                 BIBTEX_CODE);
1678                 if (inset) {
1679                         if (inset->addDatabase(cmd.argument()))
1680                                 dr.forceBufferUpdate();
1681                 }
1682                 break;
1683         }
1684
1685         case LFUN_BIBTEX_DATABASE_DEL: {
1686                 Cursor tmpcur = cur;
1687                 findInset(tmpcur, BIBTEX_CODE, false);
1688                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1689                                                 BIBTEX_CODE);
1690                 if (inset) {
1691                         if (inset->delDatabase(cmd.argument()))
1692                                 dr.forceBufferUpdate();
1693                 }
1694                 break;
1695         }
1696
1697         case LFUN_GRAPHICS_UNIFY: {
1698
1699                 cur.recordUndoFullBuffer();
1700
1701                 DocIterator from, to;
1702                 from = cur.selectionBegin();
1703                 to = cur.selectionEnd();
1704
1705                 string const newId = cmd.getArg(0);
1706                 bool fetchId = newId.empty(); //if we wait for groupId from first graphics inset
1707
1708                 InsetGraphicsParams grp_par;
1709                 if (!fetchId)
1710                         InsetGraphics::string2params(graphics::getGroupParams(buffer_, newId), buffer_, grp_par);
1711
1712                 if (!from.nextInset())  //move to closest inset
1713                         from.forwardInset();
1714
1715                 while (!from.empty() && from < to) {
1716                         Inset * inset = from.nextInset();
1717                         if (!inset)
1718                                 break;
1719                         InsetGraphics * ig = inset->asInsetGraphics();
1720                         if (ig) {
1721                                 InsetGraphicsParams inspar = ig->getParams();
1722                                 if (fetchId) {
1723                                         grp_par = inspar;
1724                                         fetchId = false;
1725                                 } else {
1726                                         grp_par.filename = inspar.filename;
1727                                         ig->setParams(grp_par);
1728                                 }
1729                         }
1730                         from.forwardInset();
1731                 }
1732                 dr.screenUpdate(Update::Force); //needed if triggered from context menu
1733                 break;
1734         }
1735
1736         case LFUN_STATISTICS: {
1737                 DocIterator from, to;
1738                 if (cur.selection()) {
1739                         from = cur.selectionBegin();
1740                         to = cur.selectionEnd();
1741                 } else {
1742                         from = doc_iterator_begin(&buffer_);
1743                         to = doc_iterator_end(&buffer_);
1744                 }
1745                 buffer_.updateStatistics(from, to);
1746                 int const words = buffer_.wordCount();
1747                 int const chars = buffer_.charCount(false);
1748                 int const chars_blanks = buffer_.charCount(true);
1749                 docstring message;
1750                 if (cur.selection())
1751                         message = _("Statistics for the selection:");
1752                 else
1753                         message = _("Statistics for the document:");
1754                 message += "\n\n";
1755                 if (words != 1)
1756                         message += bformat(_("%1$d words"), words);
1757                 else
1758                         message += _("One word");
1759                 message += "\n";
1760                 if (chars_blanks != 1)
1761                         message += bformat(_("%1$d characters (including blanks)"),
1762                                           chars_blanks);
1763                 else
1764                         message += _("One character (including blanks)");
1765                 message += "\n";
1766                 if (chars != 1)
1767                         message += bformat(_("%1$d characters (excluding blanks)"),
1768                                           chars);
1769                 else
1770                         message += _("One character (excluding blanks)");
1771
1772                 Alert::information(_("Statistics"), message);
1773         }
1774                 break;
1775
1776         case LFUN_SCREEN_UP:
1777         case LFUN_SCREEN_DOWN: {
1778                 Point p = getPos(cur);
1779                 // This code has been commented out to enable to scroll down a
1780                 // document, even if there are large insets in it (see bug #5465).
1781                 /*if (p.y_ < 0 || p.y_ > height_) {
1782                         // The cursor is off-screen so recenter before proceeding.
1783                         showCursor();
1784                         p = getPos(cur);
1785                 }*/
1786                 int const scrolled = scroll(act == LFUN_SCREEN_UP
1787                         ? -height_ : height_);
1788                 if (act == LFUN_SCREEN_UP && scrolled > -height_)
1789                         p = Point(0, 0);
1790                 if (act == LFUN_SCREEN_DOWN && scrolled < height_)
1791                         p = Point(width_, height_);
1792                 bool const in_texted = cur.inTexted();
1793                 cur.setCursor(doc_iterator_begin(cur.buffer()));
1794                 cur.selHandle(false);
1795                 // Force an immediate computation of metrics because we need it below
1796                 processUpdateFlags(Update::Force);
1797
1798                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
1799                         true, act == LFUN_SCREEN_UP);
1800                 //FIXME: what to do with cur.x_target()?
1801                 bool update = in_texted && cur.bv().checkDepm(cur, old);
1802                 cur.finishUndo();
1803
1804                 if (update || cur.mark())
1805                         dr.screenUpdate(Update::Force | Update::FitCursor);
1806                 if (update)
1807                         dr.forceBufferUpdate();
1808                 break;
1809         }
1810
1811         case LFUN_SCROLL: {
1812                 string const scroll_type = cmd.getArg(0);
1813                 int scroll_step = 0;
1814                 if (scroll_type == "line")
1815                         scroll_step = d->scrollbarParameters_.single_step;
1816                 else if (scroll_type == "page")
1817                         scroll_step = d->scrollbarParameters_.page_step;
1818                 else
1819                         return;
1820                 string const scroll_quantity = cmd.getArg(1);
1821                 if (scroll_quantity == "up")
1822                         scrollUp(scroll_step);
1823                 else if (scroll_quantity == "down")
1824                         scrollDown(scroll_step);
1825                 else {
1826                         int const scroll_value = convert<int>(scroll_quantity);
1827                         if (scroll_value)
1828                                 scroll(scroll_step * scroll_value);
1829                 }
1830                 dr.screenUpdate(Update::ForceDraw);
1831                 dr.forceBufferUpdate();
1832                 break;
1833         }
1834
1835         case LFUN_SCREEN_UP_SELECT: {
1836                 // FIXME: why is the algorithm different from LFUN_SCREEN_UP?
1837                 cur.selHandle(true);
1838                 if (isTopScreen()) {
1839                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1840                         cur.finishUndo();
1841                         break;
1842                 }
1843                 int y = getPos(cur).y_;
1844                 int const ymin = y - height_ + defaultRowHeight();
1845                 while (y > ymin && cur.up())
1846                         y = getPos(cur).y_;
1847
1848                 cur.finishUndo();
1849                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1850                 break;
1851         }
1852
1853         case LFUN_SCREEN_DOWN_SELECT: {
1854                 // FIXME: why is the algorithm different from LFUN_SCREEN_DOWN?
1855                 cur.selHandle(true);
1856                 if (isBottomScreen()) {
1857                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1858                         cur.finishUndo();
1859                         break;
1860                 }
1861                 int y = getPos(cur).y_;
1862                 int const ymax = y + height_ - defaultRowHeight();
1863                 while (y < ymax && cur.down())
1864                         y = getPos(cur).y_;
1865
1866                 cur.finishUndo();
1867                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1868                 break;
1869         }
1870
1871
1872         case LFUN_INSET_SELECT_ALL: {
1873                 // true if all cells are selected
1874                 bool const all_selected = cur.depth() > 1
1875                     && cur.selBegin().at_begin()
1876                     && cur.selEnd().at_end();
1877                 // true if some cells are selected
1878                 bool const cells_selected = cur.depth() > 1
1879                     && cur.selBegin().at_cell_begin()
1880                         && cur.selEnd().at_cell_end();
1881                 if (all_selected || (cells_selected && !cur.inset().isTable())) {
1882                         // All the contents of the inset if selected, or only at
1883                         // least one cell but inset is not a table.
1884                         // Select the inset from outside.
1885                         cur.pop();
1886                         cur.resetAnchor();
1887                         cur.selection(true);
1888                         cur.posForward();
1889                 } else if (cells_selected) {
1890                         // At least one complete cell is selected and inset is a table.
1891                         // Select all cells
1892                         cur.idx() = 0;
1893                         cur.pos() = 0;
1894                         cur.resetAnchor();
1895                         cur.selection(true);
1896                         cur.idx() = cur.lastidx();
1897                         cur.pos() = cur.lastpos();
1898                 } else {
1899                         // select current cell
1900                         cur.pit() = 0;
1901                         cur.pos() = 0;
1902                         cur.resetAnchor();
1903                         cur.selection(true);
1904                         cur.pit() = cur.lastpit();
1905                         cur.pos() = cur.lastpos();
1906                 }
1907                 cur.setCurrentFont();
1908                 dr.screenUpdate(Update::Force);
1909                 break;
1910         }
1911
1912
1913         case LFUN_UNICODE_INSERT: {
1914                 if (cmd.argument().empty())
1915                         break;
1916
1917                 FuncCode code = cur.inset().currentMode() == Inset::MATH_MODE ?
1918                         LFUN_MATH_INSERT : LFUN_SELF_INSERT;
1919                 int i = 0;
1920                 while (true) {
1921                         docstring const arg = from_utf8(cmd.getArg(i));
1922                         if (arg.empty())
1923                                 break;
1924                         if (!isHex(arg)) {
1925                                 LYXERR0("Not a hexstring: " << arg);
1926                                 ++i;
1927                                 continue;
1928                         }
1929                         char_type c = hexToInt(arg);
1930                         if (c >= 32 && c < 0x10ffff) {
1931                                 LYXERR(Debug::KEY, "Inserting c: " << c);
1932                                 lyx::dispatch(FuncRequest(code, docstring(1, c)));
1933                         }
1934                         ++i;
1935                 }
1936                 break;
1937         }
1938
1939
1940         // This would be in Buffer class if only Cursor did not
1941         // require a bufferview
1942         case LFUN_INSET_FORALL: {
1943                 docstring const name = from_utf8(cmd.getArg(0));
1944                 string const commandstr = cmd.getLongArg(1);
1945                 FuncRequest const fr = lyxaction.lookupFunc(commandstr);
1946
1947                 // an arbitrary number to limit number of iterations
1948                 const int max_iter = 100000;
1949                 int iterations = 0;
1950                 Cursor & curs = d->cursor_;
1951                 Cursor const savecur = curs;
1952                 curs.reset();
1953                 if (!curs.nextInset())
1954                         curs.forwardInset();
1955                 curs.beginUndoGroup();
1956                 while(curs && iterations < max_iter) {
1957                         Inset * const ins = curs.nextInset();
1958                         if (!ins)
1959                                 break;
1960                         docstring insname = ins->layoutName();
1961                         while (!insname.empty()) {
1962                                 if (insname == name || name == from_utf8("*")) {
1963                                         curs.recordUndo();
1964                                         lyx::dispatch(fr, dr);
1965                                         ++iterations;
1966                                         break;
1967                                 }
1968                                 size_t const i = insname.rfind(':');
1969                                 if (i == string::npos)
1970                                         break;
1971                                 insname = insname.substr(0, i);
1972                         }
1973                         // if we did not delete the inset, skip it
1974                         if (!curs.nextInset() || curs.nextInset() == ins)
1975                                 curs.forwardInset();
1976                 }
1977                 curs = savecur;
1978                 curs.fixIfBroken();
1979                 /** This is a dummy undo record only to remember the cursor
1980                  * that has just been set; this will be used on a redo action
1981                  * (see ticket #10097)
1982
1983                  * FIXME: a better fix would be to have a way to set the
1984                  * cursor value directly, but I am not sure it is worth it.
1985                  */
1986                 curs.recordUndo();
1987                 curs.endUndoGroup();
1988                 dr.screenUpdate(Update::Force);
1989                 dr.forceBufferUpdate();
1990
1991                 if (iterations >= max_iter) {
1992                         dr.setError(true);
1993                         dr.setMessage(bformat(_("`inset-forall' interrupted because number of actions is larger than %1$d"), max_iter));
1994                 } else
1995                         dr.setMessage(bformat(_("Applied \"%1$s\" to %2$d insets"), from_utf8(commandstr), iterations));
1996                 break;
1997         }
1998
1999
2000         case LFUN_BRANCH_ADD_INSERT: {
2001                 docstring branch_name = from_utf8(cmd.getArg(0));
2002                 if (branch_name.empty())
2003                         if (!Alert::askForText(branch_name, _("Branch name")) ||
2004                                                 branch_name.empty())
2005                                 break;
2006
2007                 DispatchResult drtmp;
2008                 buffer_.dispatch(FuncRequest(LFUN_BRANCH_ADD, branch_name), drtmp);
2009                 if (drtmp.error()) {
2010                         Alert::warning(_("Branch already exists"), drtmp.message());
2011                         break;
2012                 }
2013                 docstring const sep = buffer_.params().branchlist().separator();
2014                 for (docstring const & branch : getVectorFromString(branch_name, sep))
2015                         lyx::dispatch(FuncRequest(LFUN_BRANCH_INSERT, branch));
2016                 break;
2017         }
2018
2019         case LFUN_KEYMAP_OFF:
2020                 getIntl().keyMapOn(false);
2021                 break;
2022
2023         case LFUN_KEYMAP_PRIMARY:
2024                 getIntl().keyMapPrim();
2025                 break;
2026
2027         case LFUN_KEYMAP_SECONDARY:
2028                 getIntl().keyMapSec();
2029                 break;
2030
2031         case LFUN_KEYMAP_TOGGLE:
2032                 getIntl().toggleKeyMap();
2033                 break;
2034
2035         case LFUN_DIALOG_SHOW_NEW_INSET: {
2036                 string const name = cmd.getArg(0);
2037                 string data = trim(to_utf8(cmd.argument()).substr(name.size()));
2038                 if (decodeInsetParam(name, data, buffer_))
2039                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, name + " " + data));
2040                 else
2041                         lyxerr << "Inset type '" << name <<
2042                         "' not recognized in LFUN_DIALOG_SHOW_NEW_INSET" <<  endl;
2043                 break;
2044         }
2045
2046         case LFUN_CITATION_INSERT: {
2047                 if (argument.empty()) {
2048                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW_NEW_INSET, "citation"));
2049                         break;
2050                 }
2051                 // we can have one optional argument, delimited by '|'
2052                 // citation-insert <key>|<text_before>
2053                 // this should be enhanced to also support text_after
2054                 // and citation style
2055                 string arg = argument;
2056                 string opt1;
2057                 if (contains(argument, "|")) {
2058                         arg = token(argument, '|', 0);
2059                         opt1 = token(argument, '|', 1);
2060                 }
2061
2062                 // if our cursor is directly in front of or behind a citation inset,
2063                 // we will instead add the new key to it.
2064                 Inset * inset = cur.nextInset();
2065                 if (!inset || inset->lyxCode() != CITE_CODE)
2066                         inset = cur.prevInset();
2067                 if (inset && inset->lyxCode() == CITE_CODE) {
2068                         InsetCitation * icite = static_cast<InsetCitation *>(inset);
2069                         if (icite->addKey(arg)) {
2070                                 dr.forceBufferUpdate();
2071                                 dr.screenUpdate(Update::FitCursor | Update::SinglePar);
2072                                 if (!opt1.empty())
2073                                         LYXERR0("Discarding optional argument to citation-insert.");
2074                         }
2075                         dispatched = true;
2076                         break;
2077                 }
2078                 InsetCommandParams icp(CITE_CODE);
2079                 icp["key"] = from_utf8(arg);
2080                 if (!opt1.empty())
2081                         icp["before"] = from_utf8(opt1);
2082                 icp["literal"] =
2083                         from_ascii(InsetCitation::last_literal ? "true" : "false");
2084                 string icstr = InsetCommand::params2string(icp);
2085                 FuncRequest fr(LFUN_INSET_INSERT, icstr);
2086                 lyx::dispatch(fr);
2087                 break;
2088         }
2089
2090         case LFUN_INSET_APPLY: {
2091                 string const name = cmd.getArg(0);
2092                 Inset * inset = editedInset(name);
2093                 if (!inset) {
2094                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
2095                         lyx::dispatch(fr);
2096                         break;
2097                 }
2098                 // put cursor in front of inset.
2099                 if (!setCursorFromInset(inset)) {
2100                         LASSERT(false, break);
2101                 }
2102                 cur.recordUndo();
2103                 FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
2104                 inset->dispatch(cur, fr);
2105                 dr.screenUpdate(cur.result().screenUpdate());
2106                 if (cur.result().needBufferUpdate())
2107                         dr.forceBufferUpdate();
2108                 break;
2109         }
2110
2111         // FIXME:
2112         // The change of language of buffer belongs to the Buffer class.
2113         // We have to do it here because we need a cursor for Undo.
2114         // When Undo::recordUndoBufferParams() is implemented someday
2115         // LFUN_BUFFER_LANGUAGE should be handled by the Buffer class.
2116         case LFUN_BUFFER_LANGUAGE: {
2117                 Language const * oldL = buffer_.params().language;
2118                 Language const * newL = languages.getLanguage(argument);
2119                 if (!newL || oldL == newL)
2120                         break;
2121                 if (oldL->rightToLeft() == newL->rightToLeft()) {
2122                         cur.recordUndoFullBuffer();
2123                         buffer_.changeLanguage(oldL, newL);
2124                         cur.setCurrentFont();
2125                         dr.forceBufferUpdate();
2126                 }
2127                 break;
2128         }
2129
2130         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
2131         case LFUN_FILE_INSERT_PLAINTEXT: {
2132                 bool const as_paragraph = (act == LFUN_FILE_INSERT_PLAINTEXT_PARA);
2133                 string const fname = to_utf8(cmd.argument());
2134                 if (!FileName::isAbsolute(fname))
2135                         dr.setMessage(_("Absolute filename expected."));
2136                 else
2137                         insertPlaintextFile(FileName(fname), as_paragraph);
2138                 break;
2139         }
2140
2141         default:
2142                 // OK, so try the Buffer itself...
2143                 buffer_.dispatch(cmd, dr);
2144                 dispatched = dr.dispatched();
2145                 break;
2146         }
2147
2148         buffer_.undo().endUndoGroup();
2149         dr.dispatched(dispatched);
2150
2151         // NOTE: The code below is copied from Cursor::dispatch. If you
2152         // need to modify this, please update the other one too.
2153
2154         // notify insets we just entered/left
2155         if (cursor() != old) {
2156                 old.beginUndoGroup();
2157                 old.fixIfBroken();
2158                 bool badcursor = notifyCursorLeavesOrEnters(old, cursor());
2159                 if (badcursor) {
2160                         cursor().fixIfBroken();
2161                         resetInlineCompletionPos();
2162                 }
2163                 old.endUndoGroup();
2164         }
2165 }
2166
2167
2168 docstring const BufferView::requestSelection()
2169 {
2170         Cursor & cur = d->cursor_;
2171
2172         LYXERR(Debug::SELECTION, "requestSelection: cur.selection: " << cur.selection());
2173         if (!cur.selection()) {
2174                 d->xsel_cache_.set = false;
2175                 return docstring();
2176         }
2177
2178         LYXERR(Debug::SELECTION, "requestSelection: xsel_cache.set: " << d->xsel_cache_.set);
2179         if (!d->xsel_cache_.set ||
2180             cur.top() != d->xsel_cache_.cursor ||
2181             cur.realAnchor().top() != d->xsel_cache_.anchor)
2182         {
2183                 d->xsel_cache_.cursor = cur.top();
2184                 d->xsel_cache_.anchor = cur.realAnchor().top();
2185                 d->xsel_cache_.set = cur.selection();
2186                 return cur.selectionAsString(false);
2187         }
2188         return docstring();
2189 }
2190
2191
2192 void BufferView::clearSelection()
2193 {
2194         d->cursor_.clearSelection();
2195         // Clear the selection buffer. Otherwise a subsequent
2196         // middle-mouse-button paste would use the selection buffer,
2197         // not the more current external selection.
2198         cap::clearSelection();
2199         d->xsel_cache_.set = false;
2200         // The buffer did not really change, but this causes the
2201         // redraw we need because we cleared the selection above.
2202         buffer_.changed(false);
2203 }
2204
2205
2206 void BufferView::resize(int width, int height)
2207 {
2208         // Update from work area
2209         width_ = width;
2210         height_ = height;
2211
2212         // Clear the paragraph height cache.
2213         d->par_height_.clear();
2214         // Redo the metrics.
2215         updateMetrics();
2216 }
2217
2218
2219 Inset const * BufferView::getCoveringInset(Text const & text,
2220                 int x, int y) const
2221 {
2222         TextMetrics & tm = d->text_metrics_[&text];
2223         Inset * inset = tm.checkInsetHit(x, y);
2224         if (!inset)
2225                 return 0;
2226
2227         if (!inset->descendable(*this))
2228                 // No need to go further down if the inset is not
2229                 // descendable.
2230                 return inset;
2231
2232         size_t cell_number = inset->nargs();
2233         // Check all the inner cell.
2234         for (size_t i = 0; i != cell_number; ++i) {
2235                 Text const * inner_text = inset->getText(i);
2236                 if (inner_text) {
2237                         // Try deeper.
2238                         Inset const * inset_deeper =
2239                                 getCoveringInset(*inner_text, x, y);
2240                         if (inset_deeper)
2241                                 return inset_deeper;
2242                 }
2243         }
2244
2245         return inset;
2246 }
2247
2248
2249 void BufferView::updateHoveredInset() const
2250 {
2251         // Get inset under mouse, if there is one.
2252         int const x = d->mouse_position_cache_.x_;
2253         int const y = d->mouse_position_cache_.y_;
2254         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
2255
2256         d->clickable_inset_ = covering_inset && covering_inset->clickable(*this, x, y);
2257
2258         if (covering_inset == d->last_inset_)
2259                 // Same inset, no need to do anything...
2260                 return;
2261
2262         bool need_redraw = false;
2263         if (d->last_inset_) {
2264                 // Remove the hint on the last hovered inset (if any).
2265                 need_redraw |= d->last_inset_->setMouseHover(this, false);
2266                 d->last_inset_ = 0;
2267         }
2268
2269         if (covering_inset && covering_inset->setMouseHover(this, true)) {
2270                 need_redraw = true;
2271                 // Only the insets that accept the hover state, do
2272                 // clear the last_inset_, so only set the last_inset_
2273                 // member if the hovered setting is accepted.
2274                 d->last_inset_ = covering_inset;
2275         }
2276
2277         if (need_redraw) {
2278                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
2279                                 << d->mouse_position_cache_.x_ << ", "
2280                                 << d->mouse_position_cache_.y_ << ")");
2281
2282                 d->update_strategy_ = DecorationUpdate;
2283
2284                 // This event (moving without mouse click) is not passed further.
2285                 // This should be changed if it is further utilized.
2286                 buffer_.changed(false);
2287         }
2288 }
2289
2290
2291 void BufferView::clearLastInset(Inset * inset) const
2292 {
2293         if (d->last_inset_ != inset) {
2294                 LYXERR0("Wrong last_inset!");
2295                 LATTEST(false);
2296         }
2297         d->last_inset_ = 0;
2298 }
2299
2300
2301 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
2302 {
2303         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
2304
2305         // This is only called for mouse related events including
2306         // LFUN_FILE_OPEN generated by drag-and-drop.
2307         FuncRequest cmd = cmd0;
2308
2309         Cursor old = cursor();
2310         Cursor cur(*this);
2311         cur.push(buffer_.inset());
2312         cur.selection(d->cursor_.selection());
2313
2314         // Either the inset under the cursor or the
2315         // surrounding Text will handle this event.
2316
2317         // make sure we stay within the screen...
2318         cmd.set_y(min(max(cmd.y(), -1), height_));
2319
2320         d->mouse_position_cache_.x_ = cmd.x();
2321         d->mouse_position_cache_.y_ = cmd.y();
2322
2323         if (cmd.action() == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
2324                 updateHoveredInset();
2325                 return;
2326         }
2327
2328         // Build temporary cursor.
2329         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x(), cmd.y());
2330         if (inset) {
2331                 // If inset is not editable, cur.pos() might point behind the
2332                 // inset (depending on cmd.x(), cmd.y()). This is needed for
2333                 // editing to fix bug 9628, but e.g. the context menu needs a
2334                 // cursor in front of the inset.
2335                 if ((inset->hasSettings() || !inset->contextMenuName().empty()
2336                      || inset->lyxCode() == SEPARATOR_CODE) &&
2337                     cur.nextInset() != inset && cur.prevInset() == inset)
2338                         cur.posBackward();
2339         } else if (cur.inTexted() && cur.pos()
2340                         && cur.paragraph().isEnvSeparator(cur.pos() - 1)) {
2341                 // Always place cursor in front of a separator inset.
2342                 cur.posBackward();
2343         }
2344
2345         // Put anchor at the same position.
2346         cur.resetAnchor();
2347
2348         cur.beginUndoGroup();
2349
2350         // Try to dispatch to an non-editable inset near this position
2351         // via the temp cursor. If the inset wishes to change the real
2352         // cursor it has to do so explicitly by using
2353         //  cur.bv().cursor() = cur;  (or similar)
2354         if (inset)
2355                 inset->dispatch(cur, cmd);
2356
2357         // Now dispatch to the temporary cursor. If the real cursor should
2358         // be modified, the inset's dispatch has to do so explicitly.
2359         if (!inset || !cur.result().dispatched())
2360                 cur.dispatch(cmd);
2361
2362         // Notify left insets
2363         if (cur != old) {
2364                 bool badcursor = old.fixIfBroken() | cur.fixIfBroken();
2365                 badcursor |= notifyCursorLeavesOrEnters(old, cur);
2366                 if (badcursor)
2367                         cursor().fixIfBroken();
2368         }
2369
2370         cur.endUndoGroup();
2371
2372         // Do we have a selection?
2373         theSelection().haveSelection(cursor().selection());
2374
2375         if (cur.needBufferUpdate()) {
2376                 cur.clearBufferUpdate();
2377                 buffer().updateBuffer();
2378         }
2379
2380         // If the command has been dispatched,
2381         if (cur.result().dispatched() || cur.result().screenUpdate())
2382                 processUpdateFlags(cur.result().screenUpdate());
2383 }
2384
2385
2386 int BufferView::minVisiblePart()
2387 {
2388         return 2 * defaultRowHeight();
2389 }
2390
2391
2392 int BufferView::scroll(int y)
2393 {
2394         if (y > 0)
2395                 return scrollDown(y);
2396         if (y < 0)
2397                 return scrollUp(-y);
2398         return 0;
2399 }
2400
2401
2402 int BufferView::scrollDown(int offset)
2403 {
2404         Text * text = &buffer_.text();
2405         TextMetrics & tm = d->text_metrics_[text];
2406         int const ymax = height_ + offset;
2407         while (true) {
2408                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
2409                 int bottom_pos = last.second->position() + last.second->descent();
2410                 if (lyxrc.scroll_below_document)
2411                         bottom_pos += height_ - minVisiblePart();
2412                 if (last.first + 1 == int(text->paragraphs().size())) {
2413                         if (bottom_pos <= height_)
2414                                 return 0;
2415                         offset = min(offset, bottom_pos - height_);
2416                         break;
2417                 }
2418                 if (bottom_pos > ymax)
2419                         break;
2420                 tm.newParMetricsDown();
2421         }
2422         d->anchor_ypos_ -= offset;
2423         return -offset;
2424 }
2425
2426
2427 int BufferView::scrollUp(int offset)
2428 {
2429         Text * text = &buffer_.text();
2430         TextMetrics & tm = d->text_metrics_[text];
2431         int ymin = - offset;
2432         while (true) {
2433                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
2434                 int top_pos = first.second->position() - first.second->ascent();
2435                 if (first.first == 0) {
2436                         if (top_pos >= 0)
2437                                 return 0;
2438                         offset = min(offset, - top_pos);
2439                         break;
2440                 }
2441                 if (top_pos < ymin)
2442                         break;
2443                 tm.newParMetricsUp();
2444         }
2445         d->anchor_ypos_ += offset;
2446         return offset;
2447 }
2448
2449
2450 bool BufferView::setCursorFromRow(int row)
2451 {
2452         TexRow::TextEntry start, end;
2453         tie(start,end) = buffer_.texrow().getEntriesFromRow(row);
2454         LYXERR(Debug::LATEX,
2455                "setCursorFromRow: for row " << row << ", TexRow has found "
2456                "start (id=" << start.id << ",pos=" << start.pos << "), "
2457                "end (id=" << end.id << ",pos=" << end.pos << ")");
2458         return setCursorFromEntries(start, end);
2459 }
2460
2461
2462 bool BufferView::setCursorFromEntries(TexRow::TextEntry start,
2463                                       TexRow::TextEntry end)
2464 {
2465         DocIterator dit_start, dit_end;
2466         tie(dit_start,dit_end) =
2467                 TexRow::getDocIteratorsFromEntries(start, end, buffer_);
2468         if (!dit_start)
2469                 return false;
2470         // Setting selection start
2471         d->cursor_.clearSelection();
2472         setCursor(dit_start);
2473         // Setting selection end
2474         if (dit_end) {
2475                 d->cursor_.resetAnchor();
2476                 setCursorSelectionTo(dit_end);
2477         }
2478         return true;
2479 }
2480
2481
2482 bool BufferView::setCursorFromInset(Inset const * inset)
2483 {
2484         // are we already there?
2485         if (cursor().nextInset() == inset)
2486                 return true;
2487
2488         // Inset is not at cursor position. Find it in the document.
2489         Cursor cur(*this);
2490         cur.reset();
2491         while (cur && cur.nextInset() != inset)
2492                 cur.forwardInset();
2493
2494         if (cur) {
2495                 setCursor(cur);
2496                 return true;
2497         }
2498         return false;
2499 }
2500
2501
2502 void BufferView::gotoLabel(docstring const & label)
2503 {
2504         for (Buffer const * buf : buffer().allRelatives()) {
2505                 // find label
2506                 for (TocItem const & item : *buf->tocBackend().toc("label")) {
2507                         if (label == item.str()) {
2508                                 lyx::dispatch(item.action());
2509                                 return;
2510                         }
2511                 }
2512         }
2513 }
2514
2515
2516 TextMetrics const & BufferView::textMetrics(Text const * t) const
2517 {
2518         return const_cast<BufferView *>(this)->textMetrics(t);
2519 }
2520
2521
2522 TextMetrics & BufferView::textMetrics(Text const * t)
2523 {
2524         LBUFERR(t);
2525         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
2526         if (tmc_it == d->text_metrics_.end()) {
2527                 tmc_it = d->text_metrics_.insert(
2528                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
2529         }
2530         return tmc_it->second;
2531 }
2532
2533
2534 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
2535                 pit_type pit) const
2536 {
2537         return textMetrics(t).parMetrics(pit);
2538 }
2539
2540
2541 int BufferView::workHeight() const
2542 {
2543         return height_;
2544 }
2545
2546
2547 void BufferView::setCursor(DocIterator const & dit)
2548 {
2549         d->cursor_.reset();
2550         size_t const n = dit.depth();
2551         for (size_t i = 0; i < n; ++i)
2552                 dit[i].inset().edit(d->cursor_, true);
2553
2554         d->cursor_.setCursor(dit);
2555         d->cursor_.selection(false);
2556         d->cursor_.setCurrentFont();
2557         // FIXME
2558         // It seems on general grounds as if this is probably needed, but
2559         // it is not yet clear.
2560         // See bug #7394 and r38388.
2561         // d->cursor.resetAnchor();
2562 }
2563
2564
2565 void BufferView::setCursorSelectionTo(DocIterator const & dit)
2566 {
2567         size_t const n = dit.depth();
2568         for (size_t i = 0; i < n; ++i)
2569                 dit[i].inset().edit(d->cursor_, true);
2570
2571         d->cursor_.selection(true);
2572         d->cursor_.setCursorSelectionTo(dit);
2573         d->cursor_.setCurrentFont();
2574 }
2575
2576
2577 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
2578 {
2579         // Would be wrong to delete anything if we have a selection.
2580         if (cur.selection())
2581                 return false;
2582
2583         bool need_anchor_change = false;
2584         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
2585                 need_anchor_change);
2586
2587         if (need_anchor_change)
2588                 cur.resetAnchor();
2589
2590         if (!changed)
2591                 return false;
2592
2593         d->cursor_ = cur;
2594
2595         // we would rather not do this here, but it needs to be done before
2596         // the changed() signal is sent.
2597         buffer_.updateBuffer();
2598
2599         buffer_.changed(true);
2600         return true;
2601 }
2602
2603
2604 bool BufferView::mouseSetCursor(Cursor & cur, bool const select)
2605 {
2606         LASSERT(&cur.bv() == this, return false);
2607
2608         if (!select)
2609                 // this event will clear selection so we save selection for
2610                 // persistent selection
2611                 cap::saveSelection(cursor());
2612
2613         d->cursor_.macroModeClose();
2614         // If a macro has been finalized, the cursor might have been broken
2615         cur.fixIfBroken();
2616
2617         // Has the cursor just left the inset?
2618         bool const leftinset = (&d->cursor_.inset() != &cur.inset());
2619         if (leftinset)
2620                 d->cursor_.fixIfBroken();
2621
2622         // do the dEPM magic if needed
2623         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
2624         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
2625         // the leftinset bool would not be necessary (badcursor instead).
2626         bool update = leftinset;
2627
2628         if (select) {
2629                 d->cursor_.setSelection();
2630                 d->cursor_.setCursorSelectionTo(cur);
2631         } else {
2632                 if (d->cursor_.inTexted())
2633                         update |= checkDepm(cur, d->cursor_);
2634                 d->cursor_.resetAnchor();
2635                 d->cursor_.setCursor(cur);
2636                 d->cursor_.clearSelection();
2637         }
2638         d->cursor_.boundary(cur.boundary());
2639         d->cursor_.finishUndo();
2640         d->cursor_.setCurrentFont();
2641         if (update)
2642                 cur.forceBufferUpdate();
2643         return update;
2644 }
2645
2646
2647 void BufferView::putSelectionAt(DocIterator const & cur,
2648                                 int length, bool backwards)
2649 {
2650         d->cursor_.clearSelection();
2651
2652         setCursor(cur);
2653
2654         if (length) {
2655                 if (backwards) {
2656                         d->cursor_.pos() += length;
2657                         d->cursor_.setSelection(d->cursor_, -length);
2658                 } else
2659                         d->cursor_.setSelection(d->cursor_, length);
2660         }
2661 }
2662
2663
2664 bool BufferView::selectIfEmpty(DocIterator & cur)
2665 {
2666         if ((cur.inTexted() && !cur.paragraph().empty())
2667             || (cur.inMathed() && !cur.cell().empty()))
2668                 return false;
2669
2670         pit_type const beg_pit = cur.pit();
2671         if (beg_pit > 0) {
2672                 // The paragraph associated to this item isn't
2673                 // the first one, so it can be selected
2674                 cur.backwardPos();
2675         } else {
2676                 // We have to resort to select the space between the
2677                 // end of this item and the begin of the next one
2678                 cur.forwardPos();
2679         }
2680         if (cur.empty()) {
2681                 // If it is the only item in the document,
2682                 // nothing can be selected
2683                 return false;
2684         }
2685         pit_type const end_pit = cur.pit();
2686         pos_type const end_pos = cur.pos();
2687         d->cursor_.clearSelection();
2688         d->cursor_.reset();
2689         d->cursor_.setCursor(cur);
2690         d->cursor_.pit() = beg_pit;
2691         d->cursor_.pos() = 0;
2692         d->cursor_.selection(false);
2693         d->cursor_.resetAnchor();
2694         d->cursor_.pit() = end_pit;
2695         d->cursor_.pos() = end_pos;
2696         d->cursor_.setSelection();
2697         return true;
2698 }
2699
2700
2701 Cursor & BufferView::cursor()
2702 {
2703         return d->cursor_;
2704 }
2705
2706
2707 Cursor const & BufferView::cursor() const
2708 {
2709         return d->cursor_;
2710 }
2711
2712
2713 bool BufferView::singleParUpdate()
2714 {
2715         Text & buftext = buffer_.text();
2716         pit_type const bottom_pit = d->cursor_.bottom().pit();
2717         TextMetrics & tm = textMetrics(&buftext);
2718         int old_height = tm.parMetrics(bottom_pit).height();
2719
2720         // make sure inline completion pointer is ok
2721         if (d->inlineCompletionPos_.fixIfBroken())
2722                 d->inlineCompletionPos_ = DocIterator();
2723
2724         // In Single Paragraph mode, rebreak only
2725         // the (main text, not inset!) paragraph containing the cursor.
2726         // (if this paragraph contains insets etc., rebreaking will
2727         // recursively descend)
2728         tm.redoParagraph(bottom_pit);
2729         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
2730         if (pm.height() != old_height)
2731                 // Paragraph height has changed so we cannot proceed to
2732                 // the singlePar optimisation.
2733                 return false;
2734
2735         tm.updatePosCache(bottom_pit);
2736
2737         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
2738                 << " y2: " << pm.position() + pm.descent()
2739                 << " pit: " << bottom_pit
2740                 << " singlepar: 1");
2741         return true;
2742 }
2743
2744
2745 void BufferView::updateMetrics()
2746 {
2747         updateMetrics(d->update_flags_);
2748         d->update_strategy_ = FullScreenUpdate;
2749 }
2750
2751
2752 void BufferView::updateMetrics(Update::flags & update_flags)
2753 {
2754         if (height_ == 0 || width_ == 0)
2755                 return;
2756
2757         Text & buftext = buffer_.text();
2758         pit_type const npit = int(buftext.paragraphs().size());
2759
2760         // Clear out the position cache in case of full screen redraw,
2761         d->coord_cache_.clear();
2762
2763         // Clear out paragraph metrics to avoid having invalid metrics
2764         // in the cache from paragraphs not relayouted below
2765         // The complete text metrics will be redone.
2766         d->text_metrics_.clear();
2767
2768         TextMetrics & tm = textMetrics(&buftext);
2769
2770         // make sure inline completion pointer is ok
2771         if (d->inlineCompletionPos_.fixIfBroken())
2772                 d->inlineCompletionPos_ = DocIterator();
2773
2774         if (d->anchor_pit_ >= npit)
2775                 // The anchor pit must have been deleted...
2776                 d->anchor_pit_ = npit - 1;
2777
2778         // Rebreak anchor paragraph.
2779         tm.redoParagraph(d->anchor_pit_);
2780         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
2781
2782         // position anchor
2783         if (d->anchor_pit_ == 0) {
2784                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
2785
2786                 // Complete buffer visible? Then it's easy.
2787                 if (scrollRange == 0)
2788                         d->anchor_ypos_ = anchor_pm.ascent();
2789                 else {
2790                         // avoid empty space above the first row
2791                         d->anchor_ypos_ = min(d->anchor_ypos_, anchor_pm.ascent());
2792                 }
2793         }
2794         anchor_pm.setPosition(d->anchor_ypos_);
2795         tm.updatePosCache(d->anchor_pit_);
2796
2797         LYXERR(Debug::PAINTING, "metrics: "
2798                 << " anchor pit = " << d->anchor_pit_
2799                 << " anchor ypos = " << d->anchor_ypos_);
2800
2801         // Redo paragraphs above anchor if necessary.
2802         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
2803         // We are now just above the anchor paragraph.
2804         pit_type pit1 = d->anchor_pit_ - 1;
2805         for (; pit1 >= 0 && y1 >= 0; --pit1) {
2806                 tm.redoParagraph(pit1);
2807                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
2808                 y1 -= pm.descent();
2809                 // Save the paragraph position in the cache.
2810                 pm.setPosition(y1);
2811                 tm.updatePosCache(pit1);
2812                 y1 -= pm.ascent();
2813         }
2814
2815         // Redo paragraphs below the anchor if necessary.
2816         int y2 = d->anchor_ypos_ + anchor_pm.descent();
2817         // We are now just below the anchor paragraph.
2818         pit_type pit2 = d->anchor_pit_ + 1;
2819         for (; pit2 < npit && y2 <= height_; ++pit2) {
2820                 tm.redoParagraph(pit2);
2821                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
2822                 y2 += pm.ascent();
2823                 // Save the paragraph position in the cache.
2824                 pm.setPosition(y2);
2825                 tm.updatePosCache(pit2);
2826                 y2 += pm.descent();
2827         }
2828
2829         LYXERR(Debug::PAINTING, "Metrics: "
2830                 << " anchor pit = " << d->anchor_pit_
2831                 << " anchor ypos = " << d->anchor_ypos_
2832                 << " y1 = " << y1
2833                 << " y2 = " << y2
2834                 << " pit1 = " << pit1
2835                 << " pit2 = " << pit2);
2836
2837         // metrics is done, full drawing is necessary now
2838         update_flags = (update_flags & ~Update::Force) | Update::ForceDraw;
2839
2840         // Now update the positions of insets in the cache.
2841         updatePosCache();
2842
2843         if (lyxerr.debugging(Debug::WORKAREA)) {
2844                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
2845                 d->coord_cache_.dump();
2846         }
2847 }
2848
2849
2850 void BufferView::updatePosCache()
2851 {
2852         // this is the "nodraw" drawing stage: only set the positions of the
2853         // insets in metrics cache.
2854         frontend::NullPainter np;
2855         draw(np, false);
2856 }
2857
2858
2859 void BufferView::insertLyXFile(FileName const & fname)
2860 {
2861         LASSERT(d->cursor_.inTexted(), return);
2862
2863         // Get absolute path of file and add ".lyx"
2864         // to the filename if necessary
2865         FileName filename = fileSearch(string(), fname.absFileName(), "lyx");
2866
2867         docstring const disp_fn = makeDisplayPath(filename.absFileName());
2868         // emit message signal.
2869         message(bformat(_("Inserting document %1$s..."), disp_fn));
2870
2871         docstring res;
2872         Buffer buf(filename.absFileName(), false);
2873         if (buf.loadLyXFile() == Buffer::ReadSuccess) {
2874                 ErrorList & el = buffer_.errorList("Parse");
2875                 // Copy the inserted document error list into the current buffer one.
2876                 el = buf.errorList("Parse");
2877                 buffer_.undo().recordUndo(d->cursor_);
2878                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
2879                                              buf.params().documentClassPtr(), el);
2880                 res = _("Document %1$s inserted.");
2881         } else {
2882                 res = _("Could not insert document %1$s");
2883         }
2884
2885         buffer_.changed(true);
2886         // emit message signal.
2887         message(bformat(res, disp_fn));
2888 }
2889
2890
2891 Point BufferView::coordOffset(DocIterator const & dit) const
2892 {
2893         int x = 0;
2894         int y = 0;
2895         int lastw = 0;
2896
2897         // Addup contribution of nested insets, from inside to outside,
2898         // keeping the outer paragraph for a special handling below
2899         for (size_t i = dit.depth() - 1; i >= 1; --i) {
2900                 CursorSlice const & sl = dit[i];
2901                 int xx = 0;
2902                 int yy = 0;
2903
2904                 // get relative position inside sl.inset()
2905                 sl.inset().cursorPos(*this, sl, dit.boundary() && (i + 1 == dit.depth()), xx, yy);
2906
2907                 // Make relative position inside of the edited inset relative to sl.inset()
2908                 x += xx;
2909                 y += yy;
2910
2911                 // In case of an RTL inset, the edited inset will be positioned to the left
2912                 // of xx:yy
2913                 if (sl.text()) {
2914                         bool boundary_i = dit.boundary() && i + 1 == dit.depth();
2915                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
2916                         if (rtl)
2917                                 x -= lastw;
2918                 }
2919
2920                 // remember width for the case that sl.inset() is positioned in an RTL inset
2921                 lastw = sl.inset().dimension(*this).wid;
2922
2923                 //lyxerr << "Cursor::getPos, i: "
2924                 // << i << " x: " << xx << " y: " << y << endl;
2925         }
2926
2927         // Add contribution of initial rows of outermost paragraph
2928         CursorSlice const & sl = dit[0];
2929         TextMetrics const & tm = textMetrics(sl.text());
2930         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
2931
2932         LBUFERR(!pm.rows().empty());
2933         y -= pm.rows()[0].ascent();
2934 #if 1
2935         // FIXME: document this mess
2936         size_t rend;
2937         if (sl.pos() > 0 && dit.depth() == 1) {
2938                 int pos = sl.pos();
2939                 if (pos && dit.boundary())
2940                         --pos;
2941 //              lyxerr << "coordOffset: boundary:" << dit.boundary() << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
2942                 rend = pm.pos2row(pos);
2943         } else
2944                 rend = pm.pos2row(sl.pos());
2945 #else
2946         size_t rend = pm.pos2row(sl.pos());
2947 #endif
2948         for (size_t rit = 0; rit != rend; ++rit)
2949                 y += pm.rows()[rit].height();
2950         y += pm.rows()[rend].ascent();
2951
2952         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2953
2954         // Make relative position from the nested inset now bufferview absolute.
2955         int xx = bottom_tm.cursorX(dit.bottom(), dit.boundary() && dit.depth() == 1);
2956         x += xx;
2957
2958         // In the RTL case place the nested inset at the left of the cursor in
2959         // the outer paragraph
2960         bool boundary_1 = dit.boundary() && 1 == dit.depth();
2961         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2962         if (rtl)
2963                 x -= lastw;
2964
2965         return Point(x, y);
2966 }
2967
2968
2969 Point BufferView::getPos(DocIterator const & dit) const
2970 {
2971         if (!paragraphVisible(dit))
2972                 return Point(-1, -1);
2973
2974         CursorSlice const & bot = dit.bottom();
2975         TextMetrics const & tm = textMetrics(bot.text());
2976
2977         // offset from outer paragraph
2978         Point p = coordOffset(dit);
2979         p.y_ += tm.parMetrics(bot.pit()).position();
2980         return p;
2981 }
2982
2983
2984 bool BufferView::paragraphVisible(DocIterator const & dit) const
2985 {
2986         CursorSlice const & bot = dit.bottom();
2987         TextMetrics const & tm = textMetrics(bot.text());
2988
2989         return tm.contains(bot.pit());
2990 }
2991
2992
2993 void BufferView::setCaretAscentDescent(int asc, int des)
2994 {
2995         d->caret_ascent_ = asc;
2996         d->caret_descent_ = des;
2997 }
2998
2999
3000 void BufferView::caretPosAndHeight(Point & p, int & h) const
3001 {
3002         int asc, des;
3003         Cursor const & cur = cursor();
3004         if (cur.inMathed()) {
3005                 asc = d->caret_ascent_;
3006                 des = d->caret_descent_;
3007         } else {
3008                 Font const font = cur.real_current_font;
3009                 frontend::FontMetrics const & fm = theFontMetrics(font);
3010                 asc = fm.maxAscent();
3011                 des = fm.maxDescent();
3012         }
3013         h = asc + des;
3014         p = getPos(cur);
3015         p.y_ -= asc;
3016 }
3017
3018
3019 bool BufferView::cursorInView(Point const & p, int h) const
3020 {
3021         Cursor const & cur = cursor();
3022         // does the cursor touch the screen ?
3023         if (p.y_ + h < 0 || p.y_ >= workHeight() || !paragraphVisible(cur))
3024                 return false;
3025         return true;
3026 }
3027
3028
3029 int BufferView::horizScrollOffset() const
3030 {
3031         return d->horiz_scroll_offset_;
3032 }
3033
3034
3035 int BufferView::horizScrollOffset(Text const * text,
3036                                   pit_type pit, pos_type pos) const
3037 {
3038         // Is this a row that is currently scrolled?
3039         if (!d->current_row_slice_.empty()
3040             && &text->inset() == d->current_row_slice_.inset().asInsetText()
3041             && pit ==  d->current_row_slice_.pit()
3042             && pos ==  d->current_row_slice_.pos())
3043                 return d->horiz_scroll_offset_;
3044         return 0;
3045 }
3046
3047
3048 bool BufferView::hadHorizScrollOffset(Text const * text,
3049                                       pit_type pit, pos_type pos) const
3050 {
3051         return !d->last_row_slice_.empty()
3052                && &text->inset() == d->last_row_slice_.inset().asInsetText()
3053                && pit ==  d->last_row_slice_.pit()
3054                && pos ==  d->last_row_slice_.pos();
3055 }
3056
3057
3058 void BufferView::setCurrentRowSlice(CursorSlice const & rowSlice)
3059 {
3060         // nothing to do if the cursor was already on this row
3061         if (d->current_row_slice_ == rowSlice) {
3062                 d->last_row_slice_ = CursorSlice();
3063                 return;
3064         }
3065
3066         // if the (previous) current row was scrolled, we have to
3067         // remember it in order to repaint it next time.
3068         if (d->horiz_scroll_offset_ != 0)
3069                 d->last_row_slice_ = d->current_row_slice_;
3070         else
3071                 d->last_row_slice_ = CursorSlice();
3072
3073         // Since we changed row, the scroll offset is not valid anymore
3074         d->horiz_scroll_offset_ = 0;
3075         d->current_row_slice_ = rowSlice;
3076 }
3077
3078
3079 void BufferView::checkCursorScrollOffset()
3080 {
3081         CursorSlice rowSlice = d->cursor_.bottom();
3082         TextMetrics const & tm = textMetrics(rowSlice.text());
3083
3084         // Stop if metrics have not been computed yet, since it means
3085         // that there is nothing to do.
3086         if (!tm.contains(rowSlice.pit()))
3087                 return;
3088         ParagraphMetrics const & pm = tm.parMetrics(rowSlice.pit());
3089         Row const & row = pm.getRow(rowSlice.pos(),
3090                                     d->cursor_.boundary() && rowSlice == d->cursor_.top());
3091         rowSlice.pos() = row.pos();
3092
3093         // Set the row on which the cursor lives.
3094         setCurrentRowSlice(rowSlice);
3095
3096         // Current x position of the cursor in pixels
3097         int cur_x = getPos(d->cursor_).x_;
3098
3099         // Horizontal scroll offset of the cursor row in pixels
3100         int offset = d->horiz_scroll_offset_;
3101         int const MARGIN = 2 * theFontMetrics(d->cursor_.real_current_font).em()
3102                            + row.right_margin;
3103         if (row.right_x() <= workWidth() - row.right_margin) {
3104                 // Row is narrower than the work area, no offset needed.
3105                 offset = 0;
3106         } else {
3107                 if (cur_x - offset < MARGIN) {
3108                         // cursor would be too far right
3109                         offset = cur_x - MARGIN;
3110                 } else if (cur_x - offset > workWidth() - MARGIN) {
3111                         // cursor would be too far left
3112                         offset = cur_x - workWidth() + MARGIN;
3113                 }
3114                 // Correct the offset to make sure that we do not scroll too much
3115                 if (offset < 0)
3116                         offset = 0;
3117                 if (row.right_x() - offset < workWidth() - row.right_margin)
3118                         offset = row.right_x() - workWidth() + row.right_margin;
3119         }
3120
3121         //lyxerr << "cur_x=" << cur_x << ", offset=" << offset << ", row.wid=" << row.width() << ", margin=" << MARGIN << endl;
3122
3123         if (offset != d->horiz_scroll_offset_)
3124                 LYXERR(Debug::PAINTING, "Horiz. scroll offset changed from "
3125                        << d->horiz_scroll_offset_ << " to " << offset);
3126
3127         if (d->update_strategy_ == NoScreenUpdate
3128             && (offset != d->horiz_scroll_offset_
3129                 || !d->last_row_slice_.empty())) {
3130                 // FIXME: if one uses SingleParUpdate, then home/end
3131                 // will not work on long rows. Why?
3132                 d->update_strategy_ = FullScreenUpdate;
3133         }
3134
3135         d->horiz_scroll_offset_ = offset;
3136 }
3137
3138
3139 void BufferView::draw(frontend::Painter & pain, bool paint_caret)
3140 {
3141         if (height_ == 0 || width_ == 0)
3142                 return;
3143         LYXERR(Debug::PAINTING, (pain.isNull() ? "\t\t--- START NODRAW ---"
3144                                  : "\t\t*** START DRAWING ***"));
3145         Text & text = buffer_.text();
3146         TextMetrics const & tm = d->text_metrics_[&text];
3147         int const y = tm.first().second->position();
3148         PainterInfo pi(this, pain);
3149
3150         // Check whether the row where the cursor lives needs to be scrolled.
3151         // Update the drawing strategy if needed.
3152         checkCursorScrollOffset();
3153
3154         switch (d->update_strategy_) {
3155
3156         case NoScreenUpdate:
3157                 // no screen painting is actually needed. In nodraw stage
3158                 // however, the different coordinates of insets and paragraphs
3159                 // needs to be updated.
3160                 LYXERR(Debug::PAINTING, "Strategy: NoScreenUpdate");
3161                 pi.full_repaint = false;
3162                 if (pain.isNull()) {
3163                         pi.full_repaint = true;
3164                         tm.draw(pi, 0, y);
3165                 } else {
3166                         pi.full_repaint = false;
3167                         tm.draw(pi, 0, y);
3168                 }
3169                 break;
3170
3171         case SingleParUpdate:
3172                 pi.full_repaint = false;
3173                 LYXERR(Debug::PAINTING, "Strategy: SingleParUpdate");
3174                 // In general, only the current row of the outermost paragraph
3175                 // will be redrawn. Particular cases where selection spans
3176                 // multiple paragraph are correctly detected in TextMetrics.
3177                 tm.draw(pi, 0, y);
3178                 break;
3179
3180         case DecorationUpdate:
3181                 // FIXME: We should also distinguish DecorationUpdate to avoid text
3182                 // drawing if possible. This is not possible to do easily right now
3183                 // because of the single backing pixmap.
3184
3185         case FullScreenUpdate:
3186
3187                 LYXERR(Debug::PAINTING,
3188                        ((d->update_strategy_ == FullScreenUpdate)
3189                         ? "Strategy: FullScreenUpdate"
3190                         : "Strategy: DecorationUpdate"));
3191
3192                 // The whole screen, including insets, will be refreshed.
3193                 pi.full_repaint = true;
3194
3195                 // Clear background.
3196                 pain.fillRectangle(0, 0, width_, height_,
3197                         pi.backgroundColor(&buffer_.inset()));
3198
3199                 // Draw everything.
3200                 tm.draw(pi, 0, y);
3201
3202                 // and possibly grey out below
3203                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
3204                 int const y2 = lastpm.second->position() + lastpm.second->descent();
3205
3206                 if (y2 < height_) {
3207                         Color color = buffer().isInternal()
3208                                 ? Color_background : Color_bottomarea;
3209                         pain.fillRectangle(0, y2, width_, height_ - y2, color);
3210                 }
3211                 break;
3212         }
3213         LYXERR(Debug::PAINTING, (pain.isNull() ? "\t\t --- END NODRAW ---"
3214                                 : "\t\t *** END DRAWING ***"));
3215
3216         // The scrollbar needs an update.
3217         updateScrollbar();
3218
3219         // Normalize anchor for next time
3220         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
3221         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
3222         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
3223                 ParagraphMetrics const & pm = tm.parMetrics(pit);
3224                 if (pm.position() + pm.descent() > 0) {
3225                         if (d->anchor_pit_ != pit
3226                             || d->anchor_ypos_ != pm.position())
3227                                 LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
3228                                        << "  anchor ypos = " << d->anchor_ypos_);
3229                         d->anchor_pit_ = pit;
3230                         d->anchor_ypos_ = pm.position();
3231                         break;
3232                 }
3233         }
3234         if (!pain.isNull()) {
3235                 // reset the update flags, everything has been done
3236                 d->update_flags_ = Update::None;
3237         }
3238
3239         // If a caret has to be painted, mark its text row as dirty to
3240         //make sure that it will be repainted on next redraw.
3241         /* FIXME: investigate whether this can be avoided when the cursor did not
3242          * move at all
3243          */
3244         if (paint_caret) {
3245                 Row const & caret_row = d->cursor_.textRow();
3246                 caret_row.changed(true);
3247         }
3248 }
3249
3250
3251 void BufferView::message(docstring const & msg)
3252 {
3253         if (d->gui_)
3254                 d->gui_->message(msg);
3255 }
3256
3257
3258 void BufferView::showDialog(string const & name)
3259 {
3260         if (d->gui_)
3261                 d->gui_->showDialog(name, string());
3262 }
3263
3264
3265 void BufferView::showDialog(string const & name,
3266         string const & data, Inset * inset)
3267 {
3268         if (d->gui_)
3269                 d->gui_->showDialog(name, data, inset);
3270 }
3271
3272
3273 void BufferView::updateDialog(string const & name, string const & data)
3274 {
3275         if (d->gui_)
3276                 d->gui_->updateDialog(name, data);
3277 }
3278
3279
3280 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
3281 {
3282         d->gui_ = gui;
3283 }
3284
3285
3286 // FIXME: Move this out of BufferView again
3287 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
3288 {
3289         if (!fname.isReadableFile()) {
3290                 docstring const error = from_ascii(strerror(errno));
3291                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
3292                 docstring const text =
3293                   bformat(_("Could not read the specified document\n"
3294                             "%1$s\ndue to the error: %2$s"), file, error);
3295                 Alert::error(_("Could not read file"), text);
3296                 return docstring();
3297         }
3298
3299         if (!fname.isReadableFile()) {
3300                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
3301                 docstring const text =
3302                   bformat(_("%1$s\n is not readable."), file);
3303                 Alert::error(_("Could not open file"), text);
3304                 return docstring();
3305         }
3306
3307         // FIXME UNICODE: We don't know the encoding of the file
3308         docstring file_content = fname.fileContents("UTF-8");
3309         if (file_content.empty()) {
3310                 Alert::error(_("Reading not UTF-8 encoded file"),
3311                              _("The file is not UTF-8 encoded.\n"
3312                                "It will be read as local 8Bit-encoded.\n"
3313                                "If this does not give the correct result\n"
3314                                "then please change the encoding of the file\n"
3315                                "to UTF-8 with a program other than LyX.\n"));
3316                 file_content = fname.fileContents("local8bit");
3317         }
3318
3319         return normalize_c(file_content);
3320 }
3321
3322
3323 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
3324 {
3325         docstring const tmpstr = contentsOfPlaintextFile(f);
3326
3327         if (tmpstr.empty())
3328                 return;
3329
3330         Cursor & cur = cursor();
3331         cap::replaceSelection(cur);
3332         buffer_.undo().recordUndo(cur);
3333         if (asParagraph)
3334                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr, cur.current_font);
3335         else
3336                 cur.innerText()->insertStringAsLines(cur, tmpstr, cur.current_font);
3337
3338         buffer_.changed(true);
3339 }
3340
3341
3342 docstring const & BufferView::inlineCompletion() const
3343 {
3344         return d->inlineCompletion_;
3345 }
3346
3347
3348 size_t const & BufferView::inlineCompletionUniqueChars() const
3349 {
3350         return d->inlineCompletionUniqueChars_;
3351 }
3352
3353
3354 DocIterator const & BufferView::inlineCompletionPos() const
3355 {
3356         return d->inlineCompletionPos_;
3357 }
3358
3359
3360 void BufferView::resetInlineCompletionPos()
3361 {
3362         d->inlineCompletionPos_ = DocIterator();
3363 }
3364
3365
3366 bool samePar(DocIterator const & a, DocIterator const & b)
3367 {
3368         if (a.empty() && b.empty())
3369                 return true;
3370         if (a.empty() || b.empty())
3371                 return false;
3372         if (a.depth() != b.depth())
3373                 return false;
3374         return &a.innerParagraph() == &b.innerParagraph();
3375 }
3376
3377
3378 void BufferView::setInlineCompletion(Cursor const & cur, DocIterator const & pos,
3379         docstring const & completion, size_t uniqueChars)
3380 {
3381         uniqueChars = min(completion.size(), uniqueChars);
3382         bool changed = d->inlineCompletion_ != completion
3383                 || d->inlineCompletionUniqueChars_ != uniqueChars;
3384         bool singlePar = true;
3385         d->inlineCompletion_ = completion;
3386         d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
3387
3388         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
3389
3390         // at new position?
3391         DocIterator const & old = d->inlineCompletionPos_;
3392         if (old != pos) {
3393                 //lyxerr << "inlineCompletionPos changed" << std::endl;
3394                 // old or pos are in another paragraph?
3395                 if ((!samePar(cur, pos) && !pos.empty())
3396                     || (!samePar(cur, old) && !old.empty())) {
3397                         singlePar = false;
3398                         //lyxerr << "different paragraph" << std::endl;
3399                 }
3400                 d->inlineCompletionPos_ = pos;
3401         }
3402
3403         // set update flags
3404         if (changed) {
3405                 if (singlePar && !(cur.result().screenUpdate() & Update::Force))
3406                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
3407                 else
3408                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::Force);
3409         }
3410 }
3411
3412
3413 bool BufferView::clickableInset() const
3414 {
3415         return d->clickable_inset_;
3416 }
3417
3418 } // namespace lyx