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
  69 #include "frontends/alert.h"
  70 #include "frontends/Application.h"
  71 #include "frontends/Delegates.h"
  72 #include "frontends/FontMetrics.h"
  73 #include "frontends/NullPainter.h"
  74 #include "frontends/Painter.h"
  75 #include "frontends/Selection.h"
  76
  77 #include "support/convert.h"
  78 #include "support/debug.h"
  79 #include "support/ExceptionMessage.h"
  80 #include "support/filetools.h"
  81 #include "support/gettext.h"
  82 #include "support/lassert.h"
  83 #include "support/lstrings.h"
  84 #include "support/lyxlib.h"
  85 #include "support/Package.h"
  86 #include "support/types.h"
  87
  88 #include <cerrno>
  89 #include <fstream>
  90 #include <functional>
  91 #include <iterator>
  92 #include <sstream>
  93 #include <vector>
  94
  95 using namespace std;
  96 using namespace lyx::support;
  97
  98 namespace lyx {
  99
 100 namespace Alert = frontend::Alert;
 101
 102 namespace {
 103
 104 /// Return an inset of this class if it exists at the current cursor position
 105 template <class T>
 106 T * getInsetByCode(Cursor const & cur, InsetCode code)
 107 {
 108         DocIterator it = cur;
 109         Inset * inset = it.nextInset();
 110         if (inset && inset->lyxCode() == code)
 111                 return static_cast<T*>(inset);
 112         return 0;
 113 }
 114
 115
 116 /// Note that comparing contents can only be used for InsetCommand
 117 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 118         docstring const & contents)
 119 {
 120         DocIterator tmpdit = dit;
 121
 122         while (tmpdit) {
 123                 Inset const * inset = tmpdit.nextInset();
 124                 if (inset) {
 125                         bool const valid_code = std::find(codes.begin(), codes.end(),
 126                                 inset->lyxCode()) != codes.end();
 127                         InsetCommand const * ic = inset->asInsetCommand();
 128                         bool const same_or_no_contents =  contents.empty()
 129                                 || (ic && (ic->getFirstNonOptParam() == contents));
 130
 131                         if (valid_code && same_or_no_contents) {
 132                                 dit = tmpdit;
 133                                 return true;
 134                         }
 135                 }
 136                 tmpdit.forwardInset();
 137         }
 138
 139         return false;
 140 }
 141
 142
 143 /// Looks for next inset with one of the given codes.
 144 /// Note that same_content can only be used for InsetCommand
 145 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 146         bool same_content)
 147 {
 148         docstring contents;
 149         DocIterator tmpdit = dit;
 150         tmpdit.forwardInset();
 151         if (!tmpdit)
 152                 return false;
 153
 154         Inset const * inset = tmpdit.nextInset();
 155         if (same_content && inset) {
 156                 InsetCommand const * ic = inset->asInsetCommand();
 157                 if (ic) {
 158                         bool const valid_code = std::find(codes.begin(), codes.end(),
 159                                 ic->lyxCode()) != codes.end();
 160                         if (valid_code)
 161                                 contents = ic->getFirstNonOptParam();
 162                 }
 163         }
 164
 165         if (!findNextInset(tmpdit, codes, contents)) {
 166                 if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
 167                         Inset * inset = &tmpdit.bottom().inset();
 168                         tmpdit = doc_iterator_begin(&inset->buffer(), inset);
 169                         if (!findNextInset(tmpdit, codes, contents))
 170                                 return false;
 171                 } else {
 172                         return false;
 173                 }
 174         }
 175
 176         dit = tmpdit;
 177         return true;
 178 }
 179
 180
 181 /// Looks for next inset with the given code
 182 void findInset(DocIterator & dit, InsetCode code, bool same_content)
 183 {
 184         findInset(dit, vector<InsetCode>(1, code), same_content);
 185 }
 186
 187
 188 /// Moves cursor to the next inset with one of the given codes.
 189 void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
 190                bool same_content)
 191 {
 192         Cursor tmpcur = bv->cursor();
 193         if (!findInset(tmpcur, codes, same_content)) {
 194                 bv->cursor().message(_("No more insets"));
 195                 return;
 196         }
 197
 198         tmpcur.clearSelection();
 199         bv->setCursor(tmpcur);
 200         bv->showCursor();
 201 }
 202
 203
 204 /// Moves cursor to the next inset with given code.
 205 void gotoInset(BufferView * bv, InsetCode code, bool same_content)
 206 {
 207         gotoInset(bv, vector<InsetCode>(1, code), same_content);
 208 }
 209
 210
 211 /// A map from a Text to the associated text metrics
 212 typedef map<Text const *, TextMetrics> TextMetricsCache;
 213
 214 enum ScreenUpdateStrategy {
 215         NoScreenUpdate,
 216         SingleParUpdate,
 217         FullScreenUpdate,
 218         DecorationUpdate
 219 };
 220
 221 } // namespace
 222
 223
 224 /////////////////////////////////////////////////////////////////////
 225 //
 226 // BufferView
 227 //
 228 /////////////////////////////////////////////////////////////////////
 229
 230 struct BufferView::Private
 231 {
 232         Private(BufferView & bv) : update_strategy_(FullScreenUpdate),
 233                 update_flags_(Update::Force),
 234                 wh_(0), cursor_(bv),
 235                 anchor_pit_(0), anchor_ypos_(0),
 236                 inlineCompletionUniqueChars_(0),
 237                 last_inset_(0), clickable_inset_(false),
 238                 mouse_position_cache_(),
 239                 bookmark_edit_position_(-1), gui_(0),
 240                 horiz_scroll_offset_(0), repaint_caret_row_(false)
 241         {
 242                 xsel_cache_.set = false;
 243         }
 244
 245         ///
 246         ScrollbarParameters scrollbarParameters_;
 247         ///
 248         ScreenUpdateStrategy update_strategy_;
 249         ///
 250         Update::flags update_flags_;
 251         ///
 252         CoordCache coord_cache_;
 253
 254         /// Estimated average par height for scrollbar.
 255         int wh_;
 256         /// this is used to handle XSelection events in the right manner.
 257         struct {
 258                 CursorSlice cursor;
 259                 CursorSlice anchor;
 260                 bool set;
 261         } xsel_cache_;
 262         ///
 263         Cursor cursor_;
 264         ///
 265         pit_type anchor_pit_;
 266         ///
 267         int anchor_ypos_;
 268         ///
 269         vector<int> par_height_;
 270
 271         ///
 272         DocIterator inlineCompletionPos_;
 273         ///
 274         docstring inlineCompletion_;
 275         ///
 276         size_t inlineCompletionUniqueChars_;
 277
 278         /// keyboard mapping object.
 279         Intl intl_;
 280
 281         /// last visited inset.
 282         /** kept to send setMouseHover(false).
 283           * Not owned, so don't delete.
 284           */
 285         Inset const * last_inset_;
 286         /// are we hovering something that we can click
 287         bool clickable_inset_;
 288
 289         /// position of the mouse at the time of the last mouse move
 290         /// This is used to update the hovering status of inset in
 291         /// cases where the buffer is scrolled, but the mouse didn't move.
 292         Point mouse_position_cache_;
 293
 294         // cache for id of the paragraph which was edited the last time
 295         int bookmark_edit_position_;
 296
 297         mutable TextMetricsCache text_metrics_;
 298
 299         /// Whom to notify.
 300         /** Not owned, so don't delete.
 301           */
 302         frontend::GuiBufferViewDelegate * gui_;
 303
 304         /// Cache for Find Next
 305         FuncRequest search_request_cache_;
 306
 307         ///
 308         map<string, Inset *> edited_insets_;
 309
 310         /// When the row where the cursor lies is scrolled, this
 311         /// contains the scroll offset
 312         int horiz_scroll_offset_;
 313         /// a slice pointing to the start of the row where the cursor
 314         /// is (at last draw time)
 315         CursorSlice current_row_slice_;
 316         /// a slice pointing to the start of the row where cursor was
 317         /// at previous draw event
 318         CursorSlice last_row_slice_;
 319
 320         /// a slice pointing to where the cursor has been drawn after the current
 321         /// draw() call.
 322         CursorSlice caret_slice_;
 323         /// indicates whether the caret slice needs to be repainted in this draw() run.
 324         bool repaint_caret_row_;
 325 };
 326
 327
 328 BufferView::BufferView(Buffer & buf)
 329         : width_(0), height_(0), full_screen_(false), buffer_(buf),
 330       d(new Private(*this))
 331 {
 332         d->xsel_cache_.set = false;
 333         d->intl_.initKeyMapper(lyxrc.use_kbmap);
 334
 335         d->cursor_.setBuffer(&buf);
 336         d->cursor_.push(buffer_.inset());
 337         d->cursor_.resetAnchor();
 338         d->cursor_.setCurrentFont();
 339
 340         buffer_.updatePreviews();
 341 }
 342
 343
 344 BufferView::~BufferView()
 345 {
 346         // current buffer is going to be switched-off, save cursor pos
 347         // Ideally, the whole cursor stack should be saved, but session
 348         // currently can only handle bottom (whole document) level pit and pos.
 349         // That is to say, if a cursor is in a nested inset, it will be
 350         // restore to the left of the top level inset.
 351         LastFilePosSection::FilePos fp;
 352         fp.pit = d->cursor_.bottom().pit();
 353         fp.pos = d->cursor_.bottom().pos();
 354         theSession().lastFilePos().save(buffer_.fileName(), fp);
 355
 356         if (d->last_inset_)
 357                 d->last_inset_->setMouseHover(this, false);
 358
 359         delete d;
 360 }
 361
 362
 363 int BufferView::rightMargin() const
 364 {
 365         // The value used to be hardcoded to 10
 366         int const default_margin = zoomedPixels(10);
 367         // The additional test for the case the outliner is opened.
 368         if (!full_screen_ || !lyxrc.full_screen_limit
 369             || width_ < lyxrc.full_screen_width + 2 * default_margin)
 370                 return default_margin;
 371
 372         return (width_ - lyxrc.full_screen_width) / 2;
 373 }
 374
 375
 376 int BufferView::leftMargin() const
 377 {
 378         return rightMargin();
 379 }
 380
 381
 382 int BufferView::inPixels(Length const & len) const
 383 {
 384         Font const font = buffer().params().getFont();
 385         return len.inPixels(workWidth(), theFontMetrics(font).em());
 386 }
 387
 388
 389 int BufferView::zoomedPixels(int pix) const
 390 {
 391         // FIXME: the dpi setting should really depend on the BufferView
 392         // (think different monitors).
 393
 394         // Zoom factor specified by user in percent
 395         double const zoom = lyxrc.currentZoom / 100.0; // [percent]
 396
 397         // DPI setting for monitor relative to 100dpi
 398         double const dpizoom = lyxrc.dpi / 100.0; // [per 100dpi]
 399
 400         return support::iround(pix * zoom * dpizoom);
 401 }
 402
 403
 404 bool BufferView::isTopScreen() const
 405 {
 406         return 0 == d->scrollbarParameters_.min;
 407 }
 408
 409
 410 bool BufferView::isBottomScreen() const
 411 {
 412         return 0 == d->scrollbarParameters_.max;
 413 }
 414
 415
 416 Intl & BufferView::getIntl()
 417 {
 418         return d->intl_;
 419 }
 420
 421
 422 Intl const & BufferView::getIntl() const
 423 {
 424         return d->intl_;
 425 }
 426
 427
 428 CoordCache & BufferView::coordCache()
 429 {
 430         return d->coord_cache_;
 431 }
 432
 433
 434 CoordCache const & BufferView::coordCache() const
 435 {
 436         return d->coord_cache_;
 437 }
 438
 439
 440 Buffer & BufferView::buffer()
 441 {
 442         return buffer_;
 443 }
 444
 445
 446 Buffer const & BufferView::buffer() const
 447 {
 448         return buffer_;
 449 }
 450
 451
 452 bool BufferView::needsFitCursor() const
 453 {
 454         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
 455                 frontend::FontMetrics const & fm =
 456                         theFontMetrics(d->cursor_.getFont().fontInfo());
 457                 int const asc = fm.maxAscent();
 458                 int const des = fm.maxDescent();
 459                 Point const p = getPos(d->cursor_);
 460                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 461                         return false;
 462         }
 463         return true;
 464 }
 465
 466
 467 namespace {
 468
 469 // this is for debugging only.
 470 string flagsAsString(Update::flags flags)
 471 {
 472         if (flags == Update::None)
 473                 return "None ";
 474         return string((flags & Update::FitCursor) ? "FitCursor " : "")
 475                 + ((flags & Update::Force) ? "Force " : "")
 476                 + ((flags & Update::ForceDraw) ? "ForceDraw " : "")
 477                 + ((flags & Update::SinglePar) ? "SinglePar " : "");
 478 }
 479
 480 }
 481
 482 void BufferView::processUpdateFlags(Update::flags flags)
 483 {
 484         LYXERR(Debug::PAINTING, "BufferView::processUpdateFlags( "
 485                    << flagsAsString(flags) << ")  buffer: " << &buffer_);
 486
 487         // Case when no explicit update is requested.
 488         if (flags == Update::None)
 489                 return;
 490
 491         // SinglePar is ignored for now (this should probably change). We
 492         // set it ourselves below, at the price of always rebreaking the
 493         // paragraph at cursor. This can be expensive for large tables.
 494         flags = flags & ~Update::SinglePar;
 495
 496         // First check whether the metrics and inset positions should be updated
 497         if (flags & Update::Force) {
 498                 // This will update the CoordCache items and replace Force
 499                 // with ForceDraw in flags.
 500                 updateMetrics(flags);
 501         }
 502
 503         // Then make sure that the screen contains the cursor if needed
 504         if (flags & Update::FitCursor) {
 505                 if (needsFitCursor()) {
 506                         scrollToCursor(d->cursor_, false);
 507                         // Metrics have to be recomputed (maybe again)
 508                         updateMetrics(flags);
 509                 }
 510                 flags = flags & ~Update::FitCursor;
 511         }
 512
 513         // Finally detect whether we can only repaint a single paragraph
 514         if (!(flags & Update::ForceDraw)) {
 515                 if (singleParUpdate())
 516                         flags = flags | Update::SinglePar;
 517                 else
 518                         updateMetrics(flags);
 519         }
 520
 521         // Add flags to the the update flags. These will be reset to None
 522         // after the redraw is actually done
 523         d->update_flags_ = d->update_flags_ | flags;
 524         LYXERR(Debug::PAINTING, "Cumulative flags: " << flagsAsString(flags));
 525
 526         // Now compute the update strategy
 527         // Possibly values in flag are None, Decoration, ForceDraw
 528         LATTEST((d->update_flags_ & ~(Update::None | Update::SinglePar
 529                                       | Update::Decoration | Update::ForceDraw)) == 0);
 530
 531         if (d->update_flags_ & Update::ForceDraw)
 532                 d->update_strategy_ = FullScreenUpdate;
 533         else if (d->update_flags_ & Update::Decoration)
 534                 d->update_strategy_ = DecorationUpdate;
 535         else if (d->update_flags_ & Update::SinglePar)
 536                 d->update_strategy_ = SingleParUpdate;
 537         else {
 538                 // no need to redraw anything.
 539                 d->update_strategy_ = NoScreenUpdate;
 540         }
 541
 542         updateHoveredInset();
 543
 544         // Trigger a redraw.
 545         buffer_.changed(false);
 546 }
 547
 548
 549 void BufferView::updateScrollbar()
 550 {
 551         if (height_ == 0 && width_ == 0)
 552                 return;
 553
 554         // We prefer fixed size line scrolling.
 555         d->scrollbarParameters_.single_step = defaultRowHeight();
 556         // We prefer full screen page scrolling.
 557         d->scrollbarParameters_.page_step = height_;
 558
 559         Text & t = buffer_.text();
 560         TextMetrics & tm = d->text_metrics_[&t];
 561
 562         LYXERR(Debug::GUI, " Updating scrollbar: height: "
 563                 << t.paragraphs().size()
 564                 << " curr par: " << d->cursor_.bottom().pit()
 565                 << " default height " << defaultRowHeight());
 566
 567         size_t const parsize = t.paragraphs().size();
 568         if (d->par_height_.size() != parsize) {
 569                 d->par_height_.clear();
 570                 // FIXME: We assume a default paragraph height of 2 rows. This
 571                 // should probably be pondered with the screen width.
 572                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
 573         }
 574
 575         // Look at paragraph heights on-screen
 576         pair<pit_type, ParagraphMetrics const *> first = tm.first();
 577         pair<pit_type, ParagraphMetrics const *> last = tm.last();
 578         for (pit_type pit = first.first; pit <= last.first; ++pit) {
 579                 d->par_height_[pit] = tm.parMetrics(pit).height();
 580                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
 581                         << d->par_height_[pit]);
 582         }
 583
 584         int top_pos = first.second->position() - first.second->ascent();
 585         int bottom_pos = last.second->position() + last.second->descent();
 586         bool first_visible = first.first == 0 && top_pos >= 0;
 587         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
 588         if (first_visible && last_visible) {
 589                 d->scrollbarParameters_.min = 0;
 590                 d->scrollbarParameters_.max = 0;
 591                 return;
 592         }
 593
 594         d->scrollbarParameters_.min = top_pos;
 595         for (size_t i = 0; i != size_t(first.first); ++i)
 596                 d->scrollbarParameters_.min -= d->par_height_[i];
 597         d->scrollbarParameters_.max = bottom_pos;
 598         for (size_t i = last.first + 1; i != parsize; ++i)
 599                 d->scrollbarParameters_.max += d->par_height_[i];
 600
 601         // The reference is the top position so we remove one page.
 602         if (lyxrc.scroll_below_document)
 603                 d->scrollbarParameters_.max -= minVisiblePart();
 604         else
 605                 d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 606
 607         // 0 must be inside the range as it denotes the current position
 608         if (d->scrollbarParameters_.max < 0)
 609                 d->scrollbarParameters_.max = 0;
 610         if (d->scrollbarParameters_.min > 0)
 611                 d->scrollbarParameters_.min = 0;
 612 }
 613
 614
 615 ScrollbarParameters const & BufferView::scrollbarParameters() const
 616 {
 617         return d->scrollbarParameters_;
 618 }
 619
 620
 621 docstring BufferView::toolTip(int x, int y) const
 622 {
 623         // Get inset under mouse, if there is one.
 624         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 625         if (!covering_inset)
 626                 // No inset, no tooltip...
 627                 return docstring();
 628         return covering_inset->toolTip(*this, x, y);
 629 }
 630
 631
 632 string BufferView::contextMenu(int x, int y) const
 633 {
 634         //If there is a selection, return the containing inset menu
 635         if (d->cursor_.selection())
 636                 return d->cursor_.inset().contextMenu(*this, x, y);
 637
 638         // Get inset under mouse, if there is one.
 639         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 640         if (covering_inset)
 641                 return covering_inset->contextMenu(*this, x, y);
 642
 643         return buffer_.inset().contextMenu(*this, x, y);
 644 }
 645
 646
 647
 648 void BufferView::scrollDocView(int const value, bool update)
 649 {
 650         // The scrollbar values are relative to the top of the screen, therefore the
 651         // offset is equal to the target value.
 652
 653         // No scrolling at all? No need to redraw anything
 654         if (value == 0)
 655                 return;
 656
 657         // If the offset is less than 2 screen height, prefer to scroll instead.
 658         if (abs(value) <= 2 * height_) {
 659                 d->anchor_ypos_ -= value;
 660                 processUpdateFlags(Update::Force);
 661                 return;
 662         }
 663
 664         // cut off at the top
 665         if (value <= d->scrollbarParameters_.min) {
 666                 DocIterator dit = doc_iterator_begin(&buffer_);
 667                 showCursor(dit, false, update);
 668                 LYXERR(Debug::SCROLLING, "scroll to top");
 669                 return;
 670         }
 671
 672         // cut off at the bottom
 673         if (value >= d->scrollbarParameters_.max) {
 674                 DocIterator dit = doc_iterator_end(&buffer_);
 675                 dit.backwardPos();
 676                 showCursor(dit, false, update);
 677                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 678                 return;
 679         }
 680
 681         // find paragraph at target position
 682         int par_pos = d->scrollbarParameters_.min;
 683         pit_type i = 0;
 684         for (; i != int(d->par_height_.size()); ++i) {
 685                 par_pos += d->par_height_[i];
 686                 if (par_pos >= value)
 687                         break;
 688         }
 689
 690         if (par_pos < value) {
 691                 // It seems we didn't find the correct pit so stay on the safe side and
 692                 // scroll to bottom.
 693                 LYXERR0("scrolling position not found!");
 694                 scrollDocView(d->scrollbarParameters_.max, update);
 695                 return;
 696         }
 697
 698         DocIterator dit = doc_iterator_begin(&buffer_);
 699         dit.pit() = i;
 700         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 701         showCursor(dit, false, update);
 702 }
 703
 704
 705 // FIXME: this method is not working well.
 706 void BufferView::setCursorFromScrollbar()
 707 {
 708         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 709
 710         int const height = 2 * defaultRowHeight();
 711         int const first = height;
 712         int const last = height_ - height;
 713         int newy = 0;
 714         Cursor const & oldcur = d->cursor_;
 715
 716         switch (cursorStatus(oldcur)) {
 717         case CUR_ABOVE:
 718                 newy = first;
 719                 break;
 720         case CUR_BELOW:
 721                 newy = last;
 722                 break;
 723         case CUR_INSIDE:
 724                 int const y = getPos(oldcur).y_;
 725                 newy = min(last, max(y, first));
 726                 if (y == newy)
 727                         return;
 728         }
 729         // We reset the cursor because cursorStatus() does not
 730         // work when the cursor is within mathed.
 731         Cursor cur(*this);
 732         cur.reset();
 733         tm.setCursorFromCoordinates(cur, 0, newy);
 734
 735         // update the bufferview cursor and notify insets
 736         // FIXME: Care about the d->cursor_ flags to redraw if needed
 737         Cursor old = d->cursor_;
 738         mouseSetCursor(cur);
 739         // the DEPM call in mouseSetCursor() might have destroyed the
 740         // paragraph the cursor is in.
 741         bool badcursor = old.fixIfBroken();
 742         badcursor |= notifyCursorLeavesOrEnters(old, d->cursor_);
 743         if (badcursor)
 744                 d->cursor_.fixIfBroken();
 745 }
 746
 747
 748 Change const BufferView::getCurrentChange() const
 749 {
 750         if (!d->cursor_.selection())
 751                 return Change(Change::UNCHANGED);
 752
 753         DocIterator dit = d->cursor_.selectionBegin();
 754         // The selected content might have been changed (see #7685)
 755         dit = dit.getInnerText();
 756         return dit.paragraph().lookupChange(dit.pos());
 757 }
 758
 759
 760 // this could be used elsewhere as well?
 761 // FIXME: This does not work within mathed!
 762 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 763 {
 764         Point const p = getPos(dit);
 765         if (p.y_ < 0)
 766                 return CUR_ABOVE;
 767         if (p.y_ > workHeight())
 768                 return CUR_BELOW;
 769         return CUR_INSIDE;
 770 }
 771
 772
 773 void BufferView::bookmarkEditPosition()
 774 {
 775         // Don't eat cpu time for each keystroke
 776         if (d->cursor_.paragraph().id() == d->bookmark_edit_position_)
 777                 return;
 778         saveBookmark(0);
 779         d->bookmark_edit_position_ = d->cursor_.paragraph().id();
 780 }
 781
 782
 783 void BufferView::saveBookmark(unsigned int idx)
 784 {
 785         // tentatively save bookmark, id and pos will be used to
 786         // acturately locate a bookmark in a 'live' lyx session.
 787         // pit and pos will be updated with bottom level pit/pos
 788         // when lyx exits.
 789         if (!buffer_.isInternal()) {
 790                 theSession().bookmarks().save(
 791                         buffer_.fileName(),
 792                         d->cursor_.bottom().pit(),
 793                         d->cursor_.bottom().pos(),
 794                         d->cursor_.paragraph().id(),
 795                         d->cursor_.pos(),
 796                         idx
 797                         );
 798                 if (idx)
 799                         // emit message signal.
 800                         message(_("Save bookmark"));
 801         }
 802 }
 803
 804
 805 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 806         int top_id, pos_type top_pos)
 807 {
 808         bool success = false;
 809         DocIterator dit;
 810
 811         d->cursor_.clearSelection();
 812
 813         // if a valid par_id is given, try it first
 814         // This is the case for a 'live' bookmark when unique paragraph ID
 815         // is used to track bookmarks.
 816         if (top_id > 0) {
 817                 dit = buffer_.getParFromID(top_id);
 818                 if (!dit.atEnd()) {
 819                         dit.pos() = min(dit.paragraph().size(), top_pos);
 820                         // Some slices of the iterator may not be
 821                         // reachable (e.g. closed collapsible inset)
 822                         // so the dociterator may need to be
 823                         // shortened. Otherwise, setCursor may crash
 824                         // lyx when the cursor can not be set to these
 825                         // insets.
 826                         size_t const n = dit.depth();
 827                         for (size_t i = 0; i < n; ++i)
 828                                 if (!dit[i].inset().editable()) {
 829                                         dit.resize(i);
 830                                         break;
 831                                 }
 832                         success = true;
 833                 }
 834         }
 835
 836         // if top_id == 0, or searching through top_id failed
 837         // This is the case for a 'restored' bookmark when only bottom
 838         // (document level) pit was saved. Because of this, bookmark
 839         // restoration is inaccurate. If a bookmark was within an inset,
 840         // it will be restored to the left of the outmost inset that contains
 841         // the bookmark.
 842         if (bottom_pit < int(buffer_.paragraphs().size())) {
 843                 dit = doc_iterator_begin(&buffer_);
 844
 845                 dit.pit() = bottom_pit;
 846                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 847                 success = true;
 848         }
 849
 850         if (success) {
 851                 // Note: only bottom (document) level pit is set.
 852                 setCursor(dit);
 853                 // set the current font.
 854                 d->cursor_.setCurrentFont();
 855                 // Do not forget to reset the anchor (see #9912)
 856                 d->cursor_.resetAnchor();
 857                 processUpdateFlags(Update::FitCursor);
 858         }
 859
 860         return success;
 861 }
 862
 863
 864 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 865 {
 866         if (d->cursor_.real_current_font.isRightToLeft()) {
 867                 if (d->intl_.keymap == Intl::PRIMARY)
 868                         d->intl_.keyMapSec();
 869         } else {
 870                 if (d->intl_.keymap == Intl::SECONDARY)
 871                         d->intl_.keyMapPrim();
 872         }
 873
 874         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 875 }
 876
 877
 878 int BufferView::workWidth() const
 879 {
 880         return width_;
 881 }
 882
 883
 884 void BufferView::recenter()
 885 {
 886         showCursor(d->cursor_, true, true);
 887 }
 888
 889
 890 void BufferView::showCursor()
 891 {
 892         showCursor(d->cursor_, false, true);
 893 }
 894
 895
 896 void BufferView::showCursor(DocIterator const & dit,
 897         bool recenter, bool update)
 898 {
 899         if (scrollToCursor(dit, recenter) && update)
 900                 processUpdateFlags(Update::Force);
 901 }
 902
 903
 904 void BufferView::scrollToCursor()
 905 {
 906         if (scrollToCursor(d->cursor_, false))
 907                 processUpdateFlags(Update::Force);
 908 }
 909
 910
 911 bool BufferView::scrollToCursor(DocIterator const & dit, bool const recenter)
 912 {
 913         // We are not properly started yet, delay until resizing is
 914         // done.
 915         if (height_ == 0)
 916                 return false;
 917
 918         LYXERR(Debug::SCROLLING, "recentering!");
 919
 920         CursorSlice const & bot = dit.bottom();
 921         TextMetrics & tm = d->text_metrics_[bot.text()];
 922
 923         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 924         int bot_pit = bot.pit();
 925         if (bot_pit > max_pit) {
 926                 // FIXME: Why does this happen?
 927                 LYXERR0("bottom pit is greater that max pit: "
 928                         << bot_pit << " > " << max_pit);
 929                 bot_pit = max_pit;
 930         }
 931
 932         if (bot_pit == tm.first().first - 1)
 933                 tm.newParMetricsUp();
 934         else if (bot_pit == tm.last().first + 1)
 935                 tm.newParMetricsDown();
 936
 937         if (tm.contains(bot_pit)) {
 938                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 939                 LBUFERR(!pm.rows().empty());
 940                 // FIXME: smooth scrolling doesn't work in mathed.
 941                 CursorSlice const & cs = dit.innerTextSlice();
 942                 int offset = coordOffset(dit).y_;
 943                 int ypos = pm.position() + offset;
 944                 Dimension const & row_dim =
 945                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 946                 int scrolled = 0;
 947                 if (recenter)
 948                         scrolled = scroll(ypos - height_/2);
 949
 950                 // We try to visualize the whole row, if the row height is larger than
 951                 // the screen height, we scroll to a heuristic value of height_ / 4.
 952                 // FIXME: This heuristic value should be replaced by a recursive search
 953                 // for a row in the inset that can be visualized completely.
 954                 else if (row_dim.height() > height_) {
 955                         if (ypos < defaultRowHeight())
 956                                 scrolled = scroll(ypos - height_ / 4);
 957                         else if (ypos > height_ - defaultRowHeight())
 958                                 scrolled = scroll(ypos - 3 * height_ / 4);
 959                 }
 960
 961                 // If the top part of the row falls of the screen, we scroll
 962                 // up to align the top of the row with the top of the screen.
 963                 else if (ypos - row_dim.ascent() < 0 && ypos < height_) {
 964                         int ynew = row_dim.ascent();
 965                         scrolled = scrollUp(ynew - ypos);
 966                 }
 967
 968                 // If the bottom of the row falls of the screen, we scroll down.
 969                 else if (ypos + row_dim.descent() > height_ && ypos > 0) {
 970                         int ynew = height_ - row_dim.descent();
 971                         scrolled = scrollDown(ypos - ynew);
 972                 }
 973
 974                 // else, nothing to do, the cursor is already visible so we just return.
 975                 return scrolled != 0;
 976         }
 977
 978         // fix inline completion position
 979         if (d->inlineCompletionPos_.fixIfBroken())
 980                 d->inlineCompletionPos_ = DocIterator();
 981
 982         tm.redoParagraph(bot_pit);
 983         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 984         int offset = coordOffset(dit).y_;
 985
 986         d->anchor_pit_ = bot_pit;
 987         CursorSlice const & cs = dit.innerTextSlice();
 988         Dimension const & row_dim =
 989                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 990
 991         if (recenter)
 992                 d->anchor_ypos_ = height_/2;
 993         else if (d->anchor_pit_ == 0)
 994                 d->anchor_ypos_ = offset + pm.ascent();
 995         else if (d->anchor_pit_ == max_pit)
 996                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
 997         else if (offset > height_)
 998                 d->anchor_ypos_ = height_ - offset - defaultRowHeight();
 999         else
1000                 d->anchor_ypos_ = defaultRowHeight() * 2;
1001
1002         return true;
1003 }
1004
1005
1006 void BufferView::makeDocumentClass()
1007 {
1008         DocumentClassConstPtr olddc = buffer_.params().documentClassPtr();
1009         buffer_.params().makeDocumentClass();
1010         updateDocumentClass(olddc);
1011 }
1012
1013
1014 void BufferView::updateDocumentClass(DocumentClassConstPtr olddc)
1015 {
1016         message(_("Converting document to new document class..."));
1017
1018         StableDocIterator backcur(d->cursor_);
1019         ErrorList & el = buffer_.errorList("Class Switch");
1020         cap::switchBetweenClasses(
1021                         olddc, buffer_.params().documentClassPtr(),
1022                         static_cast<InsetText &>(buffer_.inset()), el);
1023
1024         setCursor(backcur.asDocIterator(&buffer_));
1025
1026         buffer_.errors("Class Switch");
1027 }
1028
1029
1030 /** Return the change status at cursor position, taking into account the
1031  * status at each level of the document iterator (a table in a deleted
1032  * footnote is deleted).
1033  * When \param outer is true, the top slice is not looked at.
1034  */
1035 static Change::Type lookupChangeType(DocIterator const & dit, bool outer = false)
1036 {
1037         size_t const depth = dit.depth() - (outer ? 1 : 0);
1038
1039         for (size_t i = 0 ; i < depth ; ++i) {
1040                 CursorSlice const & slice = dit[i];
1041                 if (!slice.inset().inMathed()
1042                     && slice.pos() < slice.paragraph().size()) {
1043                         Change::Type const ch = slice.paragraph().lookupChange(slice.pos()).type;
1044                         if (ch != Change::UNCHANGED)
1045                                 return ch;
1046                 }
1047         }
1048         return Change::UNCHANGED;
1049 }
1050
1051
1052 bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
1053 {
1054         FuncCode const act = cmd.action();
1055
1056         // Can we use a readonly buffer?
1057         if (buffer_.isReadonly()
1058             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
1059             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
1060                 if (buffer_.hasReadonlyFlag())
1061                         flag.message(from_utf8(N_("Document is read-only")));
1062                 else
1063                         flag.message(from_utf8(N_("Document has been modified externally")));
1064                 flag.setEnabled(false);
1065                 return true;
1066         }
1067
1068         // Are we in a DELETED change-tracking region?
1069         if (lookupChangeType(d->cursor_, true) == Change::DELETED
1070             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
1071             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
1072                 flag.message(from_utf8(N_("This portion of the document is deleted.")));
1073                 flag.setEnabled(false);
1074                 return true;
1075         }
1076
1077         Cursor & cur = d->cursor_;
1078
1079         if (cur.getStatus(cmd, flag))
1080                 return true;
1081
1082         switch (act) {
1083
1084         // FIXME: This is a bit problematic because we don't check if this is
1085         // a document BufferView or not for these LFUNs. We probably have to
1086         // dispatch both to currentBufferView() and, if that fails,
1087         // to documentBufferView(); same as we do now for current Buffer and
1088         // document Buffer. Ideally those LFUN should go to Buffer as they
1089         // operate on the full Buffer and the cursor is only needed either for
1090         // an Undo record or to restore a cursor position. But we don't know
1091         // how to do that inside Buffer of course.
1092         case LFUN_BUFFER_PARAMS_APPLY:
1093         case LFUN_LAYOUT_MODULES_CLEAR:
1094         case LFUN_LAYOUT_MODULE_ADD:
1095         case LFUN_LAYOUT_RELOAD:
1096         case LFUN_TEXTCLASS_APPLY:
1097         case LFUN_TEXTCLASS_LOAD:
1098                 flag.setEnabled(!buffer_.isReadonly());
1099                 break;
1100
1101         case LFUN_UNDO:
1102                 // We do not use the LyXAction flag for readonly because Undo sets the
1103                 // buffer clean/dirty status by itself.
1104                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasUndoStack());
1105                 break;
1106         case LFUN_REDO:
1107                 // We do not use the LyXAction flag for readonly because Redo sets the
1108                 // buffer clean/dirty status by itself.
1109                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasRedoStack());
1110                 break;
1111         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
1112         case LFUN_FILE_INSERT_PLAINTEXT: {
1113                 docstring const fname = cmd.argument();
1114                 if (!FileName::isAbsolute(to_utf8(fname))) {
1115                         flag.message(_("Absolute filename expected."));
1116                         return false;
1117                 }
1118                 flag.setEnabled(cur.inTexted());
1119                 break;
1120         }
1121         case LFUN_FILE_INSERT:
1122         case LFUN_BOOKMARK_SAVE:
1123                 // FIXME: Actually, these LFUNS should be moved to Text
1124                 flag.setEnabled(cur.inTexted());
1125                 break;
1126
1127         case LFUN_FONT_STATE:
1128         case LFUN_LABEL_INSERT:
1129         case LFUN_INFO_INSERT:
1130         case LFUN_PARAGRAPH_GOTO:
1131         case LFUN_NOTE_NEXT:
1132         case LFUN_REFERENCE_NEXT:
1133         case LFUN_WORD_FIND:
1134         case LFUN_WORD_FIND_FORWARD:
1135         case LFUN_WORD_FIND_BACKWARD:
1136         case LFUN_WORD_REPLACE:
1137         case LFUN_BUFFER_ANONYMIZE:
1138         case LFUN_MARK_OFF:
1139         case LFUN_MARK_ON:
1140         case LFUN_MARK_TOGGLE:
1141         case LFUN_SCREEN_RECENTER:
1142         case LFUN_SCREEN_SHOW_CURSOR:
1143         case LFUN_BIBTEX_DATABASE_ADD:
1144         case LFUN_BIBTEX_DATABASE_DEL:
1145         case LFUN_STATISTICS:
1146         case LFUN_KEYMAP_OFF:
1147         case LFUN_KEYMAP_PRIMARY:
1148         case LFUN_KEYMAP_SECONDARY:
1149         case LFUN_KEYMAP_TOGGLE:
1150         case LFUN_INSET_SELECT_ALL:
1151                 flag.setEnabled(true);
1152                 break;
1153
1154         case LFUN_WORD_FINDADV: {
1155                 FindAndReplaceOptions opt;
1156                 istringstream iss(to_utf8(cmd.argument()));
1157                 iss >> opt;
1158                 flag.setEnabled(opt.repl_buf_name.empty()
1159                                 || !buffer_.isReadonly());
1160                 break;
1161         }
1162
1163         case LFUN_LABEL_GOTO:
1164                 flag.setEnabled(!cmd.argument().empty()
1165                     || getInsetByCode<InsetRef>(cur, REF_CODE));
1166                 break;
1167
1168         case LFUN_CHANGES_MERGE:
1169         case LFUN_CHANGE_NEXT:
1170         case LFUN_CHANGE_PREVIOUS:
1171         case LFUN_ALL_CHANGES_ACCEPT:
1172         case LFUN_ALL_CHANGES_REJECT:
1173                 flag.setEnabled(buffer_.areChangesPresent());
1174                 break;
1175
1176         case LFUN_SCREEN_UP:
1177         case LFUN_SCREEN_DOWN:
1178         case LFUN_SCROLL:
1179         case LFUN_SCREEN_UP_SELECT:
1180         case LFUN_SCREEN_DOWN_SELECT:
1181         case LFUN_INSET_FORALL:
1182                 flag.setEnabled(true);
1183                 break;
1184
1185         case LFUN_LAYOUT_TABULAR:
1186                 flag.setEnabled(cur.innerInsetOfType(TABULAR_CODE));
1187                 break;
1188
1189         case LFUN_LAYOUT:
1190                 flag.setEnabled(!cur.inset().forcePlainLayout(cur.idx()));
1191                 break;
1192
1193         case LFUN_LAYOUT_PARAGRAPH:
1194                 flag.setEnabled(cur.inset().allowParagraphCustomization(cur.idx()));
1195                 break;
1196
1197         case LFUN_BRANCH_ADD_INSERT:
1198                 flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
1199                 break;
1200
1201         case LFUN_DIALOG_SHOW_NEW_INSET:
1202                 // FIXME: this is wrong, but I do not understand the
1203                 // intent (JMarc)
1204                 if (cur.inset().lyxCode() == CAPTION_CODE)
1205                         return cur.inset().getStatus(cur, cmd, flag);
1206                 // FIXME we should consider passthru paragraphs too.
1207                 flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
1208                 break;
1209
1210         case LFUN_CITATION_INSERT: {
1211                 FuncRequest fr(LFUN_INSET_INSERT, "citation");
1212                 // FIXME: This could turn in a recursive hell.
1213                 // Shouldn't we use Buffer::getStatus() instead?
1214                 flag.setEnabled(lyx::getStatus(fr).enabled());
1215                 break;
1216         }
1217         case LFUN_INSET_APPLY: {
1218                 string const name = cmd.getArg(0);
1219                 Inset * inset = editedInset(name);
1220                 if (inset) {
1221                         FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1222                         if (!inset->getStatus(cur, fr, flag)) {
1223                                 // Every inset is supposed to handle this
1224                                 LASSERT(false, break);
1225                         }
1226                 } else {
1227                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1228                         flag = lyx::getStatus(fr);
1229                 }
1230                 break;
1231         }
1232
1233         default:
1234                 return false;
1235         }
1236
1237         return true;
1238 }
1239
1240
1241 Inset * BufferView::editedInset(string const & name) const
1242 {
1243         map<string, Inset *>::const_iterator it = d->edited_insets_.find(name);
1244         return it == d->edited_insets_.end() ? 0 : it->second;
1245 }
1246
1247
1248 void BufferView::editInset(string const & name, Inset * inset)
1249 {
1250         d->edited_insets_[name] = inset;
1251 }
1252
1253
1254 void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
1255 {
1256         LYXERR(Debug::ACTION, "BufferView::dispatch: cmd: " << cmd);
1257
1258         string const argument = to_utf8(cmd.argument());
1259         Cursor & cur = d->cursor_;
1260         Cursor old = cur;
1261
1262         // Don't dispatch function that does not apply to internal buffers.
1263         if (buffer_.isInternal()
1264             && lyxaction.funcHasFlag(cmd.action(), LyXAction::NoInternal))
1265                 return;
1266
1267         // We'll set this back to false if need be.
1268         bool dispatched = true;
1269         buffer_.undo().beginUndoGroup();
1270
1271         FuncCode const act = cmd.action();
1272         switch (act) {
1273
1274         case LFUN_BUFFER_PARAMS_APPLY: {
1275                 DocumentClassConstPtr olddc = buffer_.params().documentClassPtr();
1276                 cur.recordUndoBufferParams();
1277                 istringstream ss(to_utf8(cmd.argument()));
1278                 Lexer lex;
1279                 lex.setStream(ss);
1280                 int const unknown_tokens = buffer_.readHeader(lex);
1281                 if (unknown_tokens != 0) {
1282                         LYXERR0("Warning in LFUN_BUFFER_PARAMS_APPLY!\n"
1283                                                 << unknown_tokens << " unknown token"
1284                                                 << (unknown_tokens == 1 ? "" : "s"));
1285                 }
1286                 updateDocumentClass(olddc);
1287
1288                 // We are most certainly here because of a change in the document
1289                 // It is then better to make sure that all dialogs are in sync with
1290                 // current document settings.
1291                 dr.screenUpdate(Update::Force | Update::FitCursor);
1292                 dr.forceBufferUpdate();
1293                 break;
1294         }
1295
1296         case LFUN_LAYOUT_MODULES_CLEAR: {
1297                 // FIXME: this modifies the document in cap::switchBetweenClasses
1298                 //  without calling recordUndo. Fix this before using
1299                 //  recordUndoBufferParams().
1300                 cur.recordUndoFullBuffer();
1301                 buffer_.params().clearLayoutModules();
1302                 makeDocumentClass();
1303                 dr.screenUpdate(Update::Force);
1304                 dr.forceBufferUpdate();
1305                 break;
1306         }
1307
1308         case LFUN_LAYOUT_MODULE_ADD: {
1309                 BufferParams const & params = buffer_.params();
1310                 if (!params.layoutModuleCanBeAdded(argument)) {
1311                         LYXERR0("Module `" << argument <<
1312                                 "' cannot be added due to failed requirements or "
1313                                 "conflicts with installed modules.");
1314                         break;
1315                 }
1316                 // FIXME: this modifies the document in cap::switchBetweenClasses
1317                 //  without calling recordUndo. Fix this before using
1318                 //  recordUndoBufferParams().
1319                 cur.recordUndoFullBuffer();
1320                 buffer_.params().addLayoutModule(argument);
1321                 makeDocumentClass();
1322                 dr.screenUpdate(Update::Force);
1323                 dr.forceBufferUpdate();
1324                 break;
1325         }
1326
1327         case LFUN_TEXTCLASS_APPLY: {
1328                 // since this shortcircuits, the second call is made only if
1329                 // the first fails
1330                 bool const success =
1331                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1332                         LayoutFileList::get().load(argument, buffer_.filePath());
1333                 if (!success) {
1334                         docstring s = bformat(_("The document class `%1$s' "
1335                                                  "could not be loaded."), from_utf8(argument));
1336                         frontend::Alert::error(_("Could not load class"), s);
1337                         break;
1338                 }
1339
1340                 LayoutFile const * old_layout = buffer_.params().baseClass();
1341                 LayoutFile const * new_layout = &(LayoutFileList::get()[argument]);
1342
1343                 if (old_layout == new_layout)
1344                         // nothing to do
1345                         break;
1346
1347                 // Save the old, possibly modular, layout for use in conversion.
1348                 // FIXME: this modifies the document in cap::switchBetweenClasses
1349                 //  without calling recordUndo. Fix this before using
1350                 //  recordUndoBufferParams().
1351                 cur.recordUndoFullBuffer();
1352                 buffer_.params().setBaseClass(argument);
1353                 makeDocumentClass();
1354                 dr.screenUpdate(Update::Force);
1355                 dr.forceBufferUpdate();
1356                 break;
1357         }
1358
1359         case LFUN_TEXTCLASS_LOAD: {
1360                 // since this shortcircuits, the second call is made only if
1361                 // the first fails
1362                 bool const success =
1363                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1364                         LayoutFileList::get().load(argument, buffer_.filePath());
1365                 if (!success) {
1366                         docstring s = bformat(_("The document class `%1$s' "
1367                                                  "could not be loaded."), from_utf8(argument));
1368                         frontend::Alert::error(_("Could not load class"), s);
1369                 }
1370                 break;
1371         }
1372
1373         case LFUN_LAYOUT_RELOAD: {
1374                 LayoutFileIndex bc = buffer_.params().baseClassID();
1375                 LayoutFileList::get().reset(bc);
1376                 buffer_.params().setBaseClass(bc);
1377                 makeDocumentClass();
1378                 dr.screenUpdate(Update::Force);
1379                 dr.forceBufferUpdate();
1380                 break;
1381         }
1382
1383         case LFUN_UNDO: {
1384                 dr.setMessage(_("Undo"));
1385                 cur.clearSelection();
1386                 // We need to find out if the bibliography information
1387                 // has changed. See bug #11055.
1388                 // So these should not be references...
1389                 LayoutModuleList const engines = buffer().params().citeEngine();
1390                 CiteEngineType const enginetype = buffer().params().citeEngineType();
1391                 if (!cur.textUndo())
1392                         dr.setMessage(_("No further undo information"));
1393                 else {
1394                         dr.screenUpdate(Update::Force | Update::FitCursor);
1395                         dr.forceBufferUpdate();
1396                         if (buffer().params().citeEngine() != engines ||
1397                             buffer().params().citeEngineType() != enginetype)
1398                                 buffer().invalidateCiteLabels();
1399                 }
1400                 break;
1401         }
1402
1403         case LFUN_REDO: {
1404                 dr.setMessage(_("Redo"));
1405                 cur.clearSelection();
1406                 // We need to find out if the bibliography information
1407                 // has changed. See bug #11055.
1408                 // So these should not be references...
1409                 LayoutModuleList const engines = buffer().params().citeEngine();
1410                 CiteEngineType const enginetype = buffer().params().citeEngineType();
1411                 if (!cur.textRedo())
1412                         dr.setMessage(_("No further redo information"));
1413                 else {
1414                         dr.screenUpdate(Update::Force | Update::FitCursor);
1415                         dr.forceBufferUpdate();
1416                         if (buffer().params().citeEngine() != engines ||
1417                             buffer().params().citeEngineType() != enginetype)
1418                                 buffer().invalidateCiteLabels();
1419                 }
1420                 break;
1421         }
1422
1423         case LFUN_FONT_STATE:
1424                 dr.setMessage(cur.currentState(false));
1425                 break;
1426
1427         case LFUN_BOOKMARK_SAVE:
1428                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1429                 break;
1430
1431         case LFUN_LABEL_GOTO: {
1432                 docstring label = cmd.argument();
1433                 if (label.empty()) {
1434                         InsetRef * inset =
1435                                 getInsetByCode<InsetRef>(cur, REF_CODE);
1436                         if (inset) {
1437                                 label = inset->getParam("reference");
1438                                 // persistent=false: use temp_bookmark
1439                                 saveBookmark(0);
1440                         }
1441                 }
1442                 if (!label.empty()) {
1443                         gotoLabel(label);
1444                         // at the moment, this is redundant, since gotoLabel will
1445                         // eventually call LFUN_PARAGRAPH_GOTO, but it seems best
1446                         // to have it here.
1447                         dr.screenUpdate(Update::Force | Update::FitCursor);
1448                 }
1449                 break;
1450         }
1451
1452         case LFUN_PARAGRAPH_GOTO: {
1453                 int const id = convert<int>(cmd.getArg(0));
1454                 pos_type const pos = convert<int>(cmd.getArg(1));
1455                 if (id < 0)
1456                         break;
1457                 string const str_id_end = cmd.getArg(2);
1458                 string const str_pos_end = cmd.getArg(3);
1459                 int i = 0;
1460                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1461                         b = theBufferList().next(b)) {
1462
1463                         Cursor cur(*this);
1464                         cur.setCursor(b->getParFromID(id));
1465                         if (cur.atEnd()) {
1466                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1467                                 ++i;
1468                                 continue;
1469                         }
1470                         LYXERR(Debug::INFO, "Paragraph " << cur.paragraph().id()
1471                                 << " found in buffer `"
1472                                 << b->absFileName() << "'.");
1473
1474                         if (b == &buffer_) {
1475                                 bool success;
1476                                 if (str_id_end.empty() || str_pos_end.empty()) {
1477                                         // Set the cursor
1478                                         cur.pos() = pos;
1479                                         mouseSetCursor(cur);
1480                                         success = true;
1481                                 } else {
1482                                         int const id_end = convert<int>(str_id_end);
1483                                         pos_type const pos_end = convert<int>(str_pos_end);
1484                                         success = setCursorFromEntries({id, pos},
1485                                                                        {id_end, pos_end});
1486                                 }
1487                                 if (success)
1488                                         dr.screenUpdate(Update::Force | Update::FitCursor);
1489                         } else {
1490                                 // Switch to other buffer view and resend cmd
1491                                 lyx::dispatch(FuncRequest(
1492                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1493                                 lyx::dispatch(cmd);
1494                         }
1495                         break;
1496                 }
1497                 break;
1498         }
1499
1500         case LFUN_NOTE_NEXT:
1501                 gotoInset(this, NOTE_CODE, false);
1502                 break;
1503
1504         case LFUN_REFERENCE_NEXT: {
1505                 vector<InsetCode> tmp;
1506                 tmp.push_back(LABEL_CODE);
1507                 tmp.push_back(REF_CODE);
1508                 gotoInset(this, tmp, true);
1509                 break;
1510         }
1511
1512         case LFUN_CHANGE_NEXT:
1513                 findNextChange(this);
1514                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1515                 dr.screenUpdate(Update::Force | Update::FitCursor);
1516                 break;
1517
1518         case LFUN_CHANGE_PREVIOUS:
1519                 findPreviousChange(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_CHANGES_MERGE:
1525                 if (findNextChange(this) || findPreviousChange(this)) {
1526                         dr.screenUpdate(Update::Force | Update::FitCursor);
1527                         dr.forceBufferUpdate();
1528                         showDialog("changes");
1529                 }
1530                 break;
1531
1532         case LFUN_ALL_CHANGES_ACCEPT:
1533                 // select complete document
1534                 cur.reset();
1535                 cur.selHandle(true);
1536                 buffer_.text().cursorBottom(cur);
1537                 // accept everything in a single step to support atomic undo
1538                 buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
1539                 cur.resetAnchor();
1540                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1541                 dr.screenUpdate(Update::Force | Update::FitCursor);
1542                 dr.forceBufferUpdate();
1543                 break;
1544
1545         case LFUN_ALL_CHANGES_REJECT:
1546                 // select complete document
1547                 cur.reset();
1548                 cur.selHandle(true);
1549                 buffer_.text().cursorBottom(cur);
1550                 // reject everything in a single step to support atomic undo
1551                 // Note: reject does not work recursively; the user may have to repeat the operation
1552                 buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
1553                 cur.resetAnchor();
1554                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1555                 dr.screenUpdate(Update::Force | Update::FitCursor);
1556                 dr.forceBufferUpdate();
1557                 break;
1558
1559         case LFUN_WORD_FIND_FORWARD:
1560         case LFUN_WORD_FIND_BACKWARD: {
1561                 // FIXME THREAD
1562                 // Would it maybe be better if this variable were view specific anyway?
1563                 static docstring last_search;
1564                 docstring searched_string;
1565
1566                 if (!cmd.argument().empty()) {
1567                         last_search = cmd.argument();
1568                         searched_string = cmd.argument();
1569                 } else {
1570                         searched_string = last_search;
1571                 }
1572
1573                 if (searched_string.empty())
1574                         break;
1575
1576                 bool const fw = act == LFUN_WORD_FIND_FORWARD;
1577                 docstring const data =
1578                         find2string(searched_string, true, false, fw);
1579                 bool found = lyxfind(this, FuncRequest(LFUN_WORD_FIND, data));
1580                 if (found)
1581                         dr.screenUpdate(Update::Force | Update::FitCursor);
1582                 break;
1583         }
1584
1585         case LFUN_WORD_FIND: {
1586                 FuncRequest req = cmd;
1587                 if (cmd.argument().empty() && !d->search_request_cache_.argument().empty())
1588                         req = d->search_request_cache_;
1589                 if (req.argument().empty()) {
1590                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
1591                         break;
1592                 }
1593                 if (lyxfind(this, req))
1594                         dr.screenUpdate(Update::Force | Update::FitCursor);
1595
1596                 d->search_request_cache_ = req;
1597                 break;
1598         }
1599
1600         case LFUN_WORD_REPLACE: {
1601                 bool has_deleted = false;
1602                 if (cur.selection()) {
1603                         DocIterator beg = cur.selectionBegin();
1604                         DocIterator end = cur.selectionEnd();
1605                         if (beg.pit() == end.pit()) {
1606                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1607                                         if (!cur.inMathed() && cur.paragraph().isDeleted(p)) {
1608                                                 has_deleted = true;
1609                                                 break;
1610                                         }
1611                                 }
1612                         }
1613                 }
1614                 if (lyxreplace(this, cmd, has_deleted)) {
1615                         dr.forceBufferUpdate();
1616                         dr.screenUpdate(Update::Force | Update::FitCursor);
1617                 }
1618                 break;
1619         }
1620
1621         case LFUN_BUFFER_ANONYMIZE: {
1622                 for (char c = '0'; c <= 'Z'; c++) {
1623                         odocstringstream ss;
1624                         ss << "a\n" << c << "\n0 0 1 1 0";
1625                         lyx::dispatch(FuncRequest(LFUN_WORD_REPLACE, ss.str()));
1626                 }
1627                 break;
1628         }
1629
1630         case LFUN_WORD_FINDADV: {
1631                 FindAndReplaceOptions opt;
1632                 istringstream iss(to_utf8(cmd.argument()));
1633                 iss >> opt;
1634                 if (findAdv(this, opt)) {
1635                         dr.screenUpdate(Update::Force | Update::FitCursor);
1636                         cur.dispatched();
1637                         dispatched = true;
1638                 } else {
1639                         cur.undispatched();
1640                         dispatched = false;
1641                 }
1642                 break;
1643         }
1644
1645         case LFUN_MARK_OFF:
1646                 cur.clearSelection();
1647                 dr.setMessage(from_utf8(N_("Mark off")));
1648                 break;
1649
1650         case LFUN_MARK_ON:
1651                 cur.clearSelection();
1652                 cur.setMark(true);
1653                 dr.setMessage(from_utf8(N_("Mark on")));
1654                 break;
1655
1656         case LFUN_MARK_TOGGLE:
1657                 cur.selection(false);
1658                 if (cur.mark()) {
1659                         cur.setMark(false);
1660                         dr.setMessage(from_utf8(N_("Mark removed")));
1661                 } else {
1662                         cur.setMark(true);
1663                         dr.setMessage(from_utf8(N_("Mark set")));
1664                 }
1665                 cur.resetAnchor();
1666                 break;
1667
1668         case LFUN_SCREEN_SHOW_CURSOR:
1669                 showCursor();
1670                 break;
1671
1672         case LFUN_SCREEN_RECENTER:
1673                 recenter();
1674                 break;
1675
1676         case LFUN_BIBTEX_DATABASE_ADD: {
1677                 Cursor tmpcur = cur;
1678                 findInset(tmpcur, BIBTEX_CODE, false);
1679                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1680                                                 BIBTEX_CODE);
1681                 if (inset) {
1682                         if (inset->addDatabase(cmd.argument()))
1683                                 dr.forceBufferUpdate();
1684                 }
1685                 break;
1686         }
1687
1688         case LFUN_BIBTEX_DATABASE_DEL: {
1689                 Cursor tmpcur = cur;
1690                 findInset(tmpcur, BIBTEX_CODE, false);
1691                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1692                                                 BIBTEX_CODE);
1693                 if (inset) {
1694                         if (inset->delDatabase(cmd.argument()))
1695                                 dr.forceBufferUpdate();
1696                 }
1697                 break;
1698         }
1699
1700         case LFUN_STATISTICS: {
1701                 DocIterator from, to;
1702                 if (cur.selection()) {
1703                         from = cur.selectionBegin();
1704                         to = cur.selectionEnd();
1705                 } else {
1706                         from = doc_iterator_begin(&buffer_);
1707                         to = doc_iterator_end(&buffer_);
1708                 }
1709                 buffer_.updateStatistics(from, to);
1710                 int const words = buffer_.wordCount();
1711                 int const chars = buffer_.charCount(false);
1712                 int const chars_blanks = buffer_.charCount(true);
1713                 docstring message;
1714                 if (cur.selection())
1715                         message = _("Statistics for the selection:");
1716                 else
1717                         message = _("Statistics for the document:");
1718                 message += "\n\n";
1719                 if (words != 1)
1720                         message += bformat(_("%1$d words"), words);
1721                 else
1722                         message += _("One word");
1723                 message += "\n";
1724                 if (chars_blanks != 1)
1725                         message += bformat(_("%1$d characters (including blanks)"),
1726                                           chars_blanks);
1727                 else
1728                         message += _("One character (including blanks)");
1729                 message += "\n";
1730                 if (chars != 1)
1731                         message += bformat(_("%1$d characters (excluding blanks)"),
1732                                           chars);
1733                 else
1734                         message += _("One character (excluding blanks)");
1735
1736                 Alert::information(_("Statistics"), message);
1737         }
1738                 break;
1739
1740         case LFUN_SCREEN_UP:
1741         case LFUN_SCREEN_DOWN: {
1742                 Point p = getPos(cur);
1743                 // This code has been commented out to enable to scroll down a
1744                 // document, even if there are large insets in it (see bug #5465).
1745                 /*if (p.y_ < 0 || p.y_ > height_) {
1746                         // The cursor is off-screen so recenter before proceeding.
1747                         showCursor();
1748                         p = getPos(cur);
1749                 }*/
1750                 int const scrolled = scroll(act == LFUN_SCREEN_UP
1751                         ? -height_ : height_);
1752                 if (act == LFUN_SCREEN_UP && scrolled > -height_)
1753                         p = Point(0, 0);
1754                 if (act == LFUN_SCREEN_DOWN && scrolled < height_)
1755                         p = Point(width_, height_);
1756                 bool const in_texted = cur.inTexted();
1757                 cur.setCursor(doc_iterator_begin(cur.buffer()));
1758                 cur.selHandle(false);
1759                 // Force an immediate computation of metrics because we need it below
1760                 processUpdateFlags(Update::Force);
1761
1762                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
1763                         true, act == LFUN_SCREEN_UP);
1764                 //FIXME: what to do with cur.x_target()?
1765                 bool update = in_texted && cur.bv().checkDepm(cur, old);
1766                 cur.finishUndo();
1767
1768                 if (update || cur.mark())
1769                         dr.screenUpdate(Update::Force | Update::FitCursor);
1770                 if (update)
1771                         dr.forceBufferUpdate();
1772                 break;
1773         }
1774
1775         case LFUN_SCROLL: {
1776                 string const scroll_type = cmd.getArg(0);
1777                 int scroll_step = 0;
1778                 if (scroll_type == "line")
1779                         scroll_step = d->scrollbarParameters_.single_step;
1780                 else if (scroll_type == "page")
1781                         scroll_step = d->scrollbarParameters_.page_step;
1782                 else
1783                         return;
1784                 string const scroll_quantity = cmd.getArg(1);
1785                 if (scroll_quantity == "up")
1786                         scrollUp(scroll_step);
1787                 else if (scroll_quantity == "down")
1788                         scrollDown(scroll_step);
1789                 else {
1790                         int const scroll_value = convert<int>(scroll_quantity);
1791                         if (scroll_value)
1792                                 scroll(scroll_step * scroll_value);
1793                 }
1794                 dr.screenUpdate(Update::ForceDraw);
1795                 dr.forceBufferUpdate();
1796                 break;
1797         }
1798
1799         case LFUN_SCREEN_UP_SELECT: {
1800                 // FIXME: why is the algorithm different from LFUN_SCREEN_UP?
1801                 cur.selHandle(true);
1802                 if (isTopScreen()) {
1803                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1804                         cur.finishUndo();
1805                         break;
1806                 }
1807                 int y = getPos(cur).y_;
1808                 int const ymin = y - height_ + defaultRowHeight();
1809                 while (y > ymin && cur.up())
1810                         y = getPos(cur).y_;
1811
1812                 cur.finishUndo();
1813                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1814                 break;
1815         }
1816
1817         case LFUN_SCREEN_DOWN_SELECT: {
1818                 // FIXME: why is the algorithm different from LFUN_SCREEN_DOWN?
1819                 cur.selHandle(true);
1820                 if (isBottomScreen()) {
1821                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1822                         cur.finishUndo();
1823                         break;
1824                 }
1825                 int y = getPos(cur).y_;
1826                 int const ymax = y + height_ - defaultRowHeight();
1827                 while (y < ymax && cur.down())
1828                         y = getPos(cur).y_;
1829
1830                 cur.finishUndo();
1831                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1832                 break;
1833         }
1834
1835
1836         case LFUN_INSET_SELECT_ALL: {
1837                 // true if all cells are selected
1838                 bool const all_selected = cur.depth() > 1
1839                     && cur.selBegin().at_begin()
1840                     && cur.selEnd().at_end();
1841                 // true if some cells are selected
1842                 bool const cells_selected = cur.depth() > 1
1843                     && cur.selBegin().at_cell_begin()
1844                         && cur.selEnd().at_cell_end();
1845                 if (all_selected || (cells_selected && !cur.inset().isTable())) {
1846                         // All the contents of the inset if selected, or only at
1847                         // least one cell but inset is not a table.
1848                         // Select the inset from outside.
1849                         cur.pop();
1850                         cur.resetAnchor();
1851                         cur.selection(true);
1852                         cur.posForward();
1853                 } else if (cells_selected) {
1854                         // At least one complete cell is selected and inset is a table.
1855                         // Select all cells
1856                         cur.idx() = 0;
1857                         cur.pos() = 0;
1858                         cur.resetAnchor();
1859                         cur.selection(true);
1860                         cur.idx() = cur.lastidx();
1861                         cur.pos() = cur.lastpos();
1862                 } else {
1863                         // select current cell
1864                         cur.pit() = 0;
1865                         cur.pos() = 0;
1866                         cur.resetAnchor();
1867                         cur.selection(true);
1868                         cur.pit() = cur.lastpit();
1869                         cur.pos() = cur.lastpos();
1870                 }
1871                 cur.setCurrentFont();
1872                 dr.screenUpdate(Update::Force);
1873                 break;
1874         }
1875
1876
1877         // This would be in Buffer class if only Cursor did not
1878         // require a bufferview
1879         case LFUN_INSET_FORALL: {
1880                 docstring const name = from_utf8(cmd.getArg(0));
1881                 string const commandstr = cmd.getLongArg(1);
1882                 FuncRequest const fr = lyxaction.lookupFunc(commandstr);
1883
1884                 // an arbitrary number to limit number of iterations
1885                 const int max_iter = 100000;
1886                 int iterations = 0;
1887                 Cursor & cur = d->cursor_;
1888                 Cursor const savecur = cur;
1889                 cur.reset();
1890                 if (!cur.nextInset())
1891                         cur.forwardInset();
1892                 cur.beginUndoGroup();
1893                 while(cur && iterations < max_iter) {
1894                         Inset * const ins = cur.nextInset();
1895                         if (!ins)
1896                                 break;
1897                         docstring insname = ins->layoutName();
1898                         while (!insname.empty()) {
1899                                 if (insname == name || name == from_utf8("*")) {
1900                                         cur.recordUndo();
1901                                         lyx::dispatch(fr, dr);
1902                                         ++iterations;
1903                                         break;
1904                                 }
1905                                 size_t const i = insname.rfind(':');
1906                                 if (i == string::npos)
1907                                         break;
1908                                 insname = insname.substr(0, i);
1909                         }
1910                         // if we did not delete the inset, skip it
1911                         if (!cur.nextInset() || cur.nextInset() == ins)
1912                                 cur.forwardInset();
1913                 }
1914                 cur = savecur;
1915                 cur.fixIfBroken();
1916                 /** This is a dummy undo record only to remember the cursor
1917                  * that has just been set; this will be used on a redo action
1918                  * (see ticket #10097)
1919
1920                  * FIXME: a better fix would be to have a way to set the
1921                  * cursor value directly, but I am not sure it is worth it.
1922                  */
1923                 cur.recordUndo();
1924                 cur.endUndoGroup();
1925                 dr.screenUpdate(Update::Force);
1926                 dr.forceBufferUpdate();
1927
1928                 if (iterations >= max_iter) {
1929                         dr.setError(true);
1930                         dr.setMessage(bformat(_("`inset-forall' interrupted because number of actions is larger than %1$d"), max_iter));
1931                 } else
1932                         dr.setMessage(bformat(_("Applied \"%1$s\" to %2$d insets"), from_utf8(commandstr), iterations));
1933                 break;
1934         }
1935
1936
1937         case LFUN_BRANCH_ADD_INSERT: {
1938                 docstring branch_name = from_utf8(cmd.getArg(0));
1939                 if (branch_name.empty())
1940                         if (!Alert::askForText(branch_name, _("Branch name")) ||
1941                                                 branch_name.empty())
1942                                 break;
1943
1944                 DispatchResult drtmp;
1945                 buffer_.dispatch(FuncRequest(LFUN_BRANCH_ADD, branch_name), drtmp);
1946                 if (drtmp.error()) {
1947                         Alert::warning(_("Branch already exists"), drtmp.message());
1948                         break;
1949                 }
1950                 docstring const sep = buffer_.params().branchlist().separator();
1951                 for (docstring const & branch : getVectorFromString(branch_name, sep))
1952                         lyx::dispatch(FuncRequest(LFUN_BRANCH_INSERT, branch));
1953                 break;
1954         }
1955
1956         case LFUN_KEYMAP_OFF:
1957                 getIntl().keyMapOn(false);
1958                 break;
1959
1960         case LFUN_KEYMAP_PRIMARY:
1961                 getIntl().keyMapPrim();
1962                 break;
1963
1964         case LFUN_KEYMAP_SECONDARY:
1965                 getIntl().keyMapSec();
1966                 break;
1967
1968         case LFUN_KEYMAP_TOGGLE:
1969                 getIntl().toggleKeyMap();
1970                 break;
1971
1972         case LFUN_DIALOG_SHOW_NEW_INSET: {
1973                 string const name = cmd.getArg(0);
1974                 string data = trim(to_utf8(cmd.argument()).substr(name.size()));
1975                 if (decodeInsetParam(name, data, buffer_))
1976                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, name + " " + data));
1977                 else
1978                         lyxerr << "Inset type '" << name <<
1979                         "' not recognized in LFUN_DIALOG_SHOW_NEW_INSET" <<  endl;
1980                 break;
1981         }
1982
1983         case LFUN_CITATION_INSERT: {
1984                 if (argument.empty()) {
1985                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW_NEW_INSET, "citation"));
1986                         break;
1987                 }
1988                 // we can have one optional argument, delimited by '|'
1989                 // citation-insert <key>|<text_before>
1990                 // this should be enhanced to also support text_after
1991                 // and citation style
1992                 string arg = argument;
1993                 string opt1;
1994                 if (contains(argument, "|")) {
1995                         arg = token(argument, '|', 0);
1996                         opt1 = token(argument, '|', 1);
1997                 }
1998
1999                 // if our cursor is directly in front of or behind a citation inset,
2000                 // we will instead add the new key to it.
2001                 Inset * inset = cur.nextInset();
2002                 if (!inset || inset->lyxCode() != CITE_CODE)
2003                         inset = cur.prevInset();
2004                 if (inset && inset->lyxCode() == CITE_CODE) {
2005                         InsetCitation * icite = static_cast<InsetCitation *>(inset);
2006                         if (icite->addKey(arg)) {
2007                                 dr.forceBufferUpdate();
2008                                 dr.screenUpdate(Update::FitCursor | Update::SinglePar);
2009                                 if (!opt1.empty())
2010                                         LYXERR0("Discarding optional argument to citation-insert.");
2011                         }
2012                         dispatched = true;
2013                         break;
2014                 }
2015                 InsetCommandParams icp(CITE_CODE);
2016                 icp["key"] = from_utf8(arg);
2017                 if (!opt1.empty())
2018                         icp["before"] = from_utf8(opt1);
2019                 string icstr = InsetCommand::params2string(icp);
2020                 FuncRequest fr(LFUN_INSET_INSERT, icstr);
2021                 lyx::dispatch(fr);
2022                 break;
2023         }
2024
2025         case LFUN_INSET_APPLY: {
2026                 string const name = cmd.getArg(0);
2027                 Inset * inset = editedInset(name);
2028                 if (!inset) {
2029                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
2030                         lyx::dispatch(fr);
2031                         break;
2032                 }
2033                 // put cursor in front of inset.
2034                 if (!setCursorFromInset(inset)) {
2035                         LASSERT(false, break);
2036                 }
2037                 cur.recordUndo();
2038                 FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
2039                 inset->dispatch(cur, fr);
2040                 dr.screenUpdate(cur.result().screenUpdate());
2041                 if (cur.result().needBufferUpdate())
2042                         dr.forceBufferUpdate();
2043                 break;
2044         }
2045
2046         // FIXME:
2047         // The change of language of buffer belongs to the Buffer class.
2048         // We have to do it here because we need a cursor for Undo.
2049         // When Undo::recordUndoBufferParams() is implemented someday
2050         // LFUN_BUFFER_LANGUAGE should be handled by the Buffer class.
2051         case LFUN_BUFFER_LANGUAGE: {
2052                 Language const * oldL = buffer_.params().language;
2053                 Language const * newL = languages.getLanguage(argument);
2054                 if (!newL || oldL == newL)
2055                         break;
2056                 if (oldL->rightToLeft() == newL->rightToLeft()) {
2057                         cur.recordUndoFullBuffer();
2058                         buffer_.changeLanguage(oldL, newL);
2059                         cur.setCurrentFont();
2060                         dr.forceBufferUpdate();
2061                 }
2062                 break;
2063         }
2064
2065         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
2066         case LFUN_FILE_INSERT_PLAINTEXT: {
2067                 bool const as_paragraph = (act == LFUN_FILE_INSERT_PLAINTEXT_PARA);
2068                 string const fname = to_utf8(cmd.argument());
2069                 if (!FileName::isAbsolute(fname))
2070                         dr.setMessage(_("Absolute filename expected."));
2071                 else
2072                         insertPlaintextFile(FileName(fname), as_paragraph);
2073                 break;
2074         }
2075
2076         default:
2077                 // OK, so try the Buffer itself...
2078                 buffer_.dispatch(cmd, dr);
2079                 dispatched = dr.dispatched();
2080                 break;
2081         }
2082
2083         buffer_.undo().endUndoGroup();
2084         dr.dispatched(dispatched);
2085
2086         // NOTE: The code below is copied from Cursor::dispatch. If you
2087         // need to modify this, please update the other one too.
2088
2089         // notify insets we just entered/left
2090         if (cursor() != old) {
2091                 old.beginUndoGroup();
2092                 old.fixIfBroken();
2093                 bool badcursor = notifyCursorLeavesOrEnters(old, cursor());
2094                 if (badcursor) {
2095                         cursor().fixIfBroken();
2096                         resetInlineCompletionPos();
2097                 }
2098                 old.endUndoGroup();
2099         }
2100 }
2101
2102
2103 docstring const BufferView::requestSelection()
2104 {
2105         Cursor & cur = d->cursor_;
2106
2107         LYXERR(Debug::SELECTION, "requestSelection: cur.selection: " << cur.selection());
2108         if (!cur.selection()) {
2109                 d->xsel_cache_.set = false;
2110                 return docstring();
2111         }
2112
2113         LYXERR(Debug::SELECTION, "requestSelection: xsel_cache.set: " << d->xsel_cache_.set);
2114         if (!d->xsel_cache_.set ||
2115             cur.top() != d->xsel_cache_.cursor ||
2116             cur.realAnchor().top() != d->xsel_cache_.anchor)
2117         {
2118                 d->xsel_cache_.cursor = cur.top();
2119                 d->xsel_cache_.anchor = cur.realAnchor().top();
2120                 d->xsel_cache_.set = cur.selection();
2121                 return cur.selectionAsString(false);
2122         }
2123         return docstring();
2124 }
2125
2126
2127 void BufferView::clearSelection()
2128 {
2129         d->cursor_.clearSelection();
2130         // Clear the selection buffer. Otherwise a subsequent
2131         // middle-mouse-button paste would use the selection buffer,
2132         // not the more current external selection.
2133         cap::clearSelection();
2134         d->xsel_cache_.set = false;
2135         // The buffer did not really change, but this causes the
2136         // redraw we need because we cleared the selection above.
2137         buffer_.changed(false);
2138 }
2139
2140
2141 void BufferView::resize(int width, int height)
2142 {
2143         // Update from work area
2144         width_ = width;
2145         height_ = height;
2146
2147         // Clear the paragraph height cache.
2148         d->par_height_.clear();
2149         // Redo the metrics.
2150         updateMetrics();
2151 }
2152
2153
2154 Inset const * BufferView::getCoveringInset(Text const & text,
2155                 int x, int y) const
2156 {
2157         TextMetrics & tm = d->text_metrics_[&text];
2158         Inset * inset = tm.checkInsetHit(x, y);
2159         if (!inset)
2160                 return 0;
2161
2162         if (!inset->descendable(*this))
2163                 // No need to go further down if the inset is not
2164                 // descendable.
2165                 return inset;
2166
2167         size_t cell_number = inset->nargs();
2168         // Check all the inner cell.
2169         for (size_t i = 0; i != cell_number; ++i) {
2170                 Text const * inner_text = inset->getText(i);
2171                 if (inner_text) {
2172                         // Try deeper.
2173                         Inset const * inset_deeper =
2174                                 getCoveringInset(*inner_text, x, y);
2175                         if (inset_deeper)
2176                                 return inset_deeper;
2177                 }
2178         }
2179
2180         return inset;
2181 }
2182
2183
2184 void BufferView::updateHoveredInset() const
2185 {
2186         // Get inset under mouse, if there is one.
2187         int const x = d->mouse_position_cache_.x_;
2188         int const y = d->mouse_position_cache_.y_;
2189         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
2190
2191         d->clickable_inset_ = covering_inset && covering_inset->clickable(*this, x, y);
2192
2193         if (covering_inset == d->last_inset_)
2194                 // Same inset, no need to do anything...
2195                 return;
2196
2197         bool need_redraw = false;
2198         if (d->last_inset_) {
2199                 // Remove the hint on the last hovered inset (if any).
2200                 need_redraw |= d->last_inset_->setMouseHover(this, false);
2201                 d->last_inset_ = 0;
2202         }
2203
2204         if (covering_inset && covering_inset->setMouseHover(this, true)) {
2205                 need_redraw = true;
2206                 // Only the insets that accept the hover state, do
2207                 // clear the last_inset_, so only set the last_inset_
2208                 // member if the hovered setting is accepted.
2209                 d->last_inset_ = covering_inset;
2210         }
2211
2212         if (need_redraw) {
2213                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
2214                                 << d->mouse_position_cache_.x_ << ", "
2215                                 << d->mouse_position_cache_.y_ << ")");
2216
2217                 d->update_strategy_ = DecorationUpdate;
2218
2219                 // This event (moving without mouse click) is not passed further.
2220                 // This should be changed if it is further utilized.
2221                 buffer_.changed(false);
2222         }
2223 }
2224
2225
2226 void BufferView::clearLastInset(Inset * inset) const
2227 {
2228         if (d->last_inset_ != inset) {
2229                 LYXERR0("Wrong last_inset!");
2230                 LATTEST(false);
2231         }
2232         d->last_inset_ = 0;
2233 }
2234
2235
2236 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
2237 {
2238         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
2239
2240         // This is only called for mouse related events including
2241         // LFUN_FILE_OPEN generated by drag-and-drop.
2242         FuncRequest cmd = cmd0;
2243
2244         Cursor old = cursor();
2245         Cursor cur(*this);
2246         cur.push(buffer_.inset());
2247         cur.selection(d->cursor_.selection());
2248
2249         // Either the inset under the cursor or the
2250         // surrounding Text will handle this event.
2251
2252         // make sure we stay within the screen...
2253         cmd.set_y(min(max(cmd.y(), -1), height_));
2254
2255         d->mouse_position_cache_.x_ = cmd.x();
2256         d->mouse_position_cache_.y_ = cmd.y();
2257
2258         if (cmd.action() == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
2259                 updateHoveredInset();
2260                 return;
2261         }
2262
2263         // Build temporary cursor.
2264         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x(), cmd.y());
2265         if (inset) {
2266                 // If inset is not editable, cur.pos() might point behind the
2267                 // inset (depending on cmd.x(), cmd.y()). This is needed for
2268                 // editing to fix bug 9628, but e.g. the context menu needs a
2269                 // cursor in front of the inset.
2270                 if ((inset->hasSettings() || !inset->contextMenuName().empty()
2271                      || inset->lyxCode() == SEPARATOR_CODE) &&
2272                     cur.nextInset() != inset && cur.prevInset() == inset)
2273                         cur.posBackward();
2274         } else if (cur.inTexted() && cur.pos()
2275                         && cur.paragraph().isEnvSeparator(cur.pos() - 1)) {
2276                 // Always place cursor in front of a separator inset.
2277                 cur.posBackward();
2278         }
2279
2280         // Put anchor at the same position.
2281         cur.resetAnchor();
2282
2283         cur.beginUndoGroup();
2284
2285         // Try to dispatch to an non-editable inset near this position
2286         // via the temp cursor. If the inset wishes to change the real
2287         // cursor it has to do so explicitly by using
2288         //  cur.bv().cursor() = cur;  (or similar)
2289         if (inset)
2290                 inset->dispatch(cur, cmd);
2291
2292         // Now dispatch to the temporary cursor. If the real cursor should
2293         // be modified, the inset's dispatch has to do so explicitly.
2294         if (!inset || !cur.result().dispatched())
2295                 cur.dispatch(cmd);
2296
2297         // Notify left insets
2298         if (cur != old) {
2299                 bool badcursor = old.fixIfBroken() | cur.fixIfBroken();
2300                 badcursor |= notifyCursorLeavesOrEnters(old, cur);
2301                 if (badcursor)
2302                         cursor().fixIfBroken();
2303         }
2304
2305         cur.endUndoGroup();
2306
2307         // Do we have a selection?
2308         theSelection().haveSelection(cursor().selection());
2309
2310         if (cur.needBufferUpdate()) {
2311                 cur.clearBufferUpdate();
2312                 buffer().updateBuffer();
2313         }
2314
2315         // If the command has been dispatched,
2316         if (cur.result().dispatched() || cur.result().screenUpdate())
2317                 processUpdateFlags(cur.result().screenUpdate());
2318 }
2319
2320
2321 int BufferView::minVisiblePart()
2322 {
2323         return 2 * defaultRowHeight();
2324 }
2325
2326
2327 int BufferView::scroll(int y)
2328 {
2329         if (y > 0)
2330                 return scrollDown(y);
2331         if (y < 0)
2332                 return scrollUp(-y);
2333         return 0;
2334 }
2335
2336
2337 int BufferView::scrollDown(int offset)
2338 {
2339         Text * text = &buffer_.text();
2340         TextMetrics & tm = d->text_metrics_[text];
2341         int const ymax = height_ + offset;
2342         while (true) {
2343                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
2344                 int bottom_pos = last.second->position() + last.second->descent();
2345                 if (lyxrc.scroll_below_document)
2346                         bottom_pos += height_ - minVisiblePart();
2347                 if (last.first + 1 == int(text->paragraphs().size())) {
2348                         if (bottom_pos <= height_)
2349                                 return 0;
2350                         offset = min(offset, bottom_pos - height_);
2351                         break;
2352                 }
2353                 if (bottom_pos > ymax)
2354                         break;
2355                 tm.newParMetricsDown();
2356         }
2357         d->anchor_ypos_ -= offset;
2358         return -offset;
2359 }
2360
2361
2362 int BufferView::scrollUp(int offset)
2363 {
2364         Text * text = &buffer_.text();
2365         TextMetrics & tm = d->text_metrics_[text];
2366         int ymin = - offset;
2367         while (true) {
2368                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
2369                 int top_pos = first.second->position() - first.second->ascent();
2370                 if (first.first == 0) {
2371                         if (top_pos >= 0)
2372                                 return 0;
2373                         offset = min(offset, - top_pos);
2374                         break;
2375                 }
2376                 if (top_pos < ymin)
2377                         break;
2378                 tm.newParMetricsUp();
2379         }
2380         d->anchor_ypos_ += offset;
2381         return offset;
2382 }
2383
2384
2385 bool BufferView::setCursorFromRow(int row)
2386 {
2387         TexRow::TextEntry start, end;
2388         tie(start,end) = buffer_.texrow().getEntriesFromRow(row);
2389         LYXERR(Debug::LATEX,
2390                "setCursorFromRow: for row " << row << ", TexRow has found "
2391                "start (id=" << start.id << ",pos=" << start.pos << "), "
2392                "end (id=" << end.id << ",pos=" << end.pos << ")");
2393         return setCursorFromEntries(start, end);
2394 }
2395
2396
2397 bool BufferView::setCursorFromEntries(TexRow::TextEntry start,
2398                                       TexRow::TextEntry end)
2399 {
2400         DocIterator dit_start, dit_end;
2401         tie(dit_start,dit_end) =
2402                 TexRow::getDocIteratorsFromEntries(start, end, buffer_);
2403         if (!dit_start)
2404                 return false;
2405         // Setting selection start
2406         d->cursor_.clearSelection();
2407         setCursor(dit_start);
2408         // Setting selection end
2409         if (dit_end) {
2410                 d->cursor_.resetAnchor();
2411                 setCursorSelectionTo(dit_end);
2412         }
2413         return true;
2414 }
2415
2416
2417 bool BufferView::setCursorFromInset(Inset const * inset)
2418 {
2419         // are we already there?
2420         if (cursor().nextInset() == inset)
2421                 return true;
2422
2423         // Inset is not at cursor position. Find it in the document.
2424         Cursor cur(*this);
2425         cur.reset();
2426         while (cur && cur.nextInset() != inset)
2427                 cur.forwardInset();
2428
2429         if (cur) {
2430                 setCursor(cur);
2431                 return true;
2432         }
2433         return false;
2434 }
2435
2436
2437 void BufferView::gotoLabel(docstring const & label)
2438 {
2439         for (Buffer const * buf : buffer().allRelatives()) {
2440                 // find label
2441                 for (TocItem const & item : *buf->tocBackend().toc("label")) {
2442                         if (label == item.str()) {
2443                                 lyx::dispatch(item.action());
2444                                 return;
2445                         }
2446                 }
2447         }
2448 }
2449
2450
2451 TextMetrics const & BufferView::textMetrics(Text const * t) const
2452 {
2453         return const_cast<BufferView *>(this)->textMetrics(t);
2454 }
2455
2456
2457 TextMetrics & BufferView::textMetrics(Text const * t)
2458 {
2459         LBUFERR(t);
2460         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
2461         if (tmc_it == d->text_metrics_.end()) {
2462                 tmc_it = d->text_metrics_.insert(
2463                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
2464         }
2465         return tmc_it->second;
2466 }
2467
2468
2469 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
2470                 pit_type pit) const
2471 {
2472         return textMetrics(t).parMetrics(pit);
2473 }
2474
2475
2476 int BufferView::workHeight() const
2477 {
2478         return height_;
2479 }
2480
2481
2482 void BufferView::setCursor(DocIterator const & dit)
2483 {
2484         d->cursor_.reset();
2485         size_t const n = dit.depth();
2486         for (size_t i = 0; i < n; ++i)
2487                 dit[i].inset().edit(d->cursor_, true);
2488
2489         d->cursor_.setCursor(dit);
2490         d->cursor_.selection(false);
2491         d->cursor_.setCurrentFont();
2492         // FIXME
2493         // It seems on general grounds as if this is probably needed, but
2494         // it is not yet clear.
2495         // See bug #7394 and r38388.
2496         // d->cursor.resetAnchor();
2497 }
2498
2499
2500 void BufferView::setCursorSelectionTo(DocIterator const & dit)
2501 {
2502         size_t const n = dit.depth();
2503         for (size_t i = 0; i < n; ++i)
2504                 dit[i].inset().edit(d->cursor_, true);
2505
2506         d->cursor_.selection(true);
2507         d->cursor_.setCursorSelectionTo(dit);
2508         d->cursor_.setCurrentFont();
2509 }
2510
2511
2512 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
2513 {
2514         // Would be wrong to delete anything if we have a selection.
2515         if (cur.selection())
2516                 return false;
2517
2518         bool need_anchor_change = false;
2519         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
2520                 need_anchor_change);
2521
2522         if (need_anchor_change)
2523                 cur.resetAnchor();
2524
2525         if (!changed)
2526                 return false;
2527
2528         d->cursor_ = cur;
2529
2530         // we would rather not do this here, but it needs to be done before
2531         // the changed() signal is sent.
2532         buffer_.updateBuffer();
2533
2534         buffer_.changed(true);
2535         return true;
2536 }
2537
2538
2539 bool BufferView::mouseSetCursor(Cursor & cur, bool const select)
2540 {
2541         LASSERT(&cur.bv() == this, return false);
2542
2543         if (!select)
2544                 // this event will clear selection so we save selection for
2545                 // persistent selection
2546                 cap::saveSelection(cursor());
2547
2548         d->cursor_.macroModeClose();
2549         // If a macro has been finalized, the cursor might have been broken
2550         cur.fixIfBroken();
2551
2552         // Has the cursor just left the inset?
2553         bool const leftinset = (&d->cursor_.inset() != &cur.inset());
2554         if (leftinset)
2555                 d->cursor_.fixIfBroken();
2556
2557         // do the dEPM magic if needed
2558         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
2559         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
2560         // the leftinset bool would not be necessary (badcursor instead).
2561         bool update = leftinset;
2562
2563         if (select) {
2564                 d->cursor_.setSelection();
2565                 d->cursor_.setCursorSelectionTo(cur);
2566         } else {
2567                 if (d->cursor_.inTexted())
2568                         update |= checkDepm(cur, d->cursor_);
2569                 d->cursor_.resetAnchor();
2570                 d->cursor_.setCursor(cur);
2571                 d->cursor_.clearSelection();
2572         }
2573         d->cursor_.boundary(cur.boundary());
2574         d->cursor_.finishUndo();
2575         d->cursor_.setCurrentFont();
2576         if (update)
2577                 cur.forceBufferUpdate();
2578         return update;
2579 }
2580
2581
2582 void BufferView::putSelectionAt(DocIterator const & cur,
2583                                 int length, bool backwards)
2584 {
2585         d->cursor_.clearSelection();
2586
2587         setCursor(cur);
2588
2589         if (length) {
2590                 if (backwards) {
2591                         d->cursor_.pos() += length;
2592                         d->cursor_.setSelection(d->cursor_, -length);
2593                 } else
2594                         d->cursor_.setSelection(d->cursor_, length);
2595         }
2596 }
2597
2598
2599 bool BufferView::selectIfEmpty(DocIterator & cur)
2600 {
2601         if ((cur.inTexted() && !cur.paragraph().empty())
2602             || (cur.inMathed() && !cur.cell().empty()))
2603                 return false;
2604
2605         pit_type const beg_pit = cur.pit();
2606         if (beg_pit > 0) {
2607                 // The paragraph associated to this item isn't
2608                 // the first one, so it can be selected
2609                 cur.backwardPos();
2610         } else {
2611                 // We have to resort to select the space between the
2612                 // end of this item and the begin of the next one
2613                 cur.forwardPos();
2614         }
2615         if (cur.empty()) {
2616                 // If it is the only item in the document,
2617                 // nothing can be selected
2618                 return false;
2619         }
2620         pit_type const end_pit = cur.pit();
2621         pos_type const end_pos = cur.pos();
2622         d->cursor_.clearSelection();
2623         d->cursor_.reset();
2624         d->cursor_.setCursor(cur);
2625         d->cursor_.pit() = beg_pit;
2626         d->cursor_.pos() = 0;
2627         d->cursor_.selection(false);
2628         d->cursor_.resetAnchor();
2629         d->cursor_.pit() = end_pit;
2630         d->cursor_.pos() = end_pos;
2631         d->cursor_.setSelection();
2632         return true;
2633 }
2634
2635
2636 Cursor & BufferView::cursor()
2637 {
2638         return d->cursor_;
2639 }
2640
2641
2642 Cursor const & BufferView::cursor() const
2643 {
2644         return d->cursor_;
2645 }
2646
2647
2648 bool BufferView::singleParUpdate()
2649 {
2650         Text & buftext = buffer_.text();
2651         pit_type const bottom_pit = d->cursor_.bottom().pit();
2652         TextMetrics & tm = textMetrics(&buftext);
2653         int old_height = tm.parMetrics(bottom_pit).height();
2654
2655         // make sure inline completion pointer is ok
2656         if (d->inlineCompletionPos_.fixIfBroken())
2657                 d->inlineCompletionPos_ = DocIterator();
2658
2659         // In Single Paragraph mode, rebreak only
2660         // the (main text, not inset!) paragraph containing the cursor.
2661         // (if this paragraph contains insets etc., rebreaking will
2662         // recursively descend)
2663         tm.redoParagraph(bottom_pit);
2664         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
2665         if (pm.height() != old_height)
2666                 // Paragraph height has changed so we cannot proceed to
2667                 // the singlePar optimisation.
2668                 return false;
2669
2670         tm.updatePosCache(bottom_pit);
2671
2672         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
2673                 << " y2: " << pm.position() + pm.descent()
2674                 << " pit: " << bottom_pit
2675                 << " singlepar: 1");
2676         return true;
2677 }
2678
2679
2680 void BufferView::updateMetrics()
2681 {
2682         updateMetrics(d->update_flags_);
2683         d->update_strategy_ = FullScreenUpdate;
2684 }
2685
2686
2687 void BufferView::updateMetrics(Update::flags & update_flags)
2688 {
2689         if (height_ == 0 || width_ == 0)
2690                 return;
2691
2692         Text & buftext = buffer_.text();
2693         pit_type const npit = int(buftext.paragraphs().size());
2694
2695         // Clear out the position cache in case of full screen redraw,
2696         d->coord_cache_.clear();
2697
2698         // Clear out paragraph metrics to avoid having invalid metrics
2699         // in the cache from paragraphs not relayouted below
2700         // The complete text metrics will be redone.
2701         d->text_metrics_.clear();
2702
2703         TextMetrics & tm = textMetrics(&buftext);
2704
2705         // make sure inline completion pointer is ok
2706         if (d->inlineCompletionPos_.fixIfBroken())
2707                 d->inlineCompletionPos_ = DocIterator();
2708
2709         if (d->anchor_pit_ >= npit)
2710                 // The anchor pit must have been deleted...
2711                 d->anchor_pit_ = npit - 1;
2712
2713         // Rebreak anchor paragraph.
2714         tm.redoParagraph(d->anchor_pit_);
2715         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
2716
2717         // position anchor
2718         if (d->anchor_pit_ == 0) {
2719                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
2720
2721                 // Complete buffer visible? Then it's easy.
2722                 if (scrollRange == 0)
2723                         d->anchor_ypos_ = anchor_pm.ascent();
2724                 else {
2725                         // avoid empty space above the first row
2726                         d->anchor_ypos_ = min(d->anchor_ypos_, anchor_pm.ascent());
2727                 }
2728         }
2729         anchor_pm.setPosition(d->anchor_ypos_);
2730         tm.updatePosCache(d->anchor_pit_);
2731
2732         LYXERR(Debug::PAINTING, "metrics: "
2733                 << " anchor pit = " << d->anchor_pit_
2734                 << " anchor ypos = " << d->anchor_ypos_);
2735
2736         // Redo paragraphs above anchor if necessary.
2737         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
2738         // We are now just above the anchor paragraph.
2739         pit_type pit1 = d->anchor_pit_ - 1;
2740         for (; pit1 >= 0 && y1 >= 0; --pit1) {
2741                 tm.redoParagraph(pit1);
2742                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
2743                 y1 -= pm.descent();
2744                 // Save the paragraph position in the cache.
2745                 pm.setPosition(y1);
2746                 tm.updatePosCache(pit1);
2747                 y1 -= pm.ascent();
2748         }
2749
2750         // Redo paragraphs below the anchor if necessary.
2751         int y2 = d->anchor_ypos_ + anchor_pm.descent();
2752         // We are now just below the anchor paragraph.
2753         pit_type pit2 = d->anchor_pit_ + 1;
2754         for (; pit2 < npit && y2 <= height_; ++pit2) {
2755                 tm.redoParagraph(pit2);
2756                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
2757                 y2 += pm.ascent();
2758                 // Save the paragraph position in the cache.
2759                 pm.setPosition(y2);
2760                 tm.updatePosCache(pit2);
2761                 y2 += pm.descent();
2762         }
2763
2764         LYXERR(Debug::PAINTING, "Metrics: "
2765                 << " anchor pit = " << d->anchor_pit_
2766                 << " anchor ypos = " << d->anchor_ypos_
2767                 << " y1 = " << y1
2768                 << " y2 = " << y2
2769                 << " pit1 = " << pit1
2770                 << " pit2 = " << pit2);
2771
2772         // metrics is done, full drawing is necessary now
2773         update_flags = (update_flags & ~Update::Force) | Update::ForceDraw;
2774
2775         // Now update the positions of insets in the cache.
2776         updatePosCache();
2777
2778         if (lyxerr.debugging(Debug::WORKAREA)) {
2779                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
2780                 d->coord_cache_.dump();
2781         }
2782 }
2783
2784
2785 void BufferView::updatePosCache()
2786 {
2787         // this is the "nodraw" drawing stage: only set the positions of the
2788         // insets in metrics cache.
2789         frontend::NullPainter np;
2790         draw(np, false);
2791 }
2792
2793
2794 void BufferView::insertLyXFile(FileName const & fname)
2795 {
2796         LASSERT(d->cursor_.inTexted(), return);
2797
2798         // Get absolute path of file and add ".lyx"
2799         // to the filename if necessary
2800         FileName filename = fileSearch(string(), fname.absFileName(), "lyx");
2801
2802         docstring const disp_fn = makeDisplayPath(filename.absFileName());
2803         // emit message signal.
2804         message(bformat(_("Inserting document %1$s..."), disp_fn));
2805
2806         docstring res;
2807         Buffer buf(filename.absFileName(), false);
2808         if (buf.loadLyXFile() == Buffer::ReadSuccess) {
2809                 ErrorList & el = buffer_.errorList("Parse");
2810                 // Copy the inserted document error list into the current buffer one.
2811                 el = buf.errorList("Parse");
2812                 buffer_.undo().recordUndo(d->cursor_);
2813                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
2814                                              buf.params().documentClassPtr(), el);
2815                 res = _("Document %1$s inserted.");
2816         } else {
2817                 res = _("Could not insert document %1$s");
2818         }
2819
2820         buffer_.changed(true);
2821         // emit message signal.
2822         message(bformat(res, disp_fn));
2823 }
2824
2825
2826 Point BufferView::coordOffset(DocIterator const & dit) const
2827 {
2828         int x = 0;
2829         int y = 0;
2830         int lastw = 0;
2831
2832         // Addup contribution of nested insets, from inside to outside,
2833         // keeping the outer paragraph for a special handling below
2834         for (size_t i = dit.depth() - 1; i >= 1; --i) {
2835                 CursorSlice const & sl = dit[i];
2836                 int xx = 0;
2837                 int yy = 0;
2838
2839                 // get relative position inside sl.inset()
2840                 sl.inset().cursorPos(*this, sl, dit.boundary() && (i + 1 == dit.depth()), xx, yy);
2841
2842                 // Make relative position inside of the edited inset relative to sl.inset()
2843                 x += xx;
2844                 y += yy;
2845
2846                 // In case of an RTL inset, the edited inset will be positioned to the left
2847                 // of xx:yy
2848                 if (sl.text()) {
2849                         bool boundary_i = dit.boundary() && i + 1 == dit.depth();
2850                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
2851                         if (rtl)
2852                                 x -= lastw;
2853                 }
2854
2855                 // remember width for the case that sl.inset() is positioned in an RTL inset
2856                 lastw = sl.inset().dimension(*this).wid;
2857
2858                 //lyxerr << "Cursor::getPos, i: "
2859                 // << i << " x: " << xx << " y: " << y << endl;
2860         }
2861
2862         // Add contribution of initial rows of outermost paragraph
2863         CursorSlice const & sl = dit[0];
2864         TextMetrics const & tm = textMetrics(sl.text());
2865         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
2866
2867         LBUFERR(!pm.rows().empty());
2868         y -= pm.rows()[0].ascent();
2869 #if 1
2870         // FIXME: document this mess
2871         size_t rend;
2872         if (sl.pos() > 0 && dit.depth() == 1) {
2873                 int pos = sl.pos();
2874                 if (pos && dit.boundary())
2875                         --pos;
2876 //              lyxerr << "coordOffset: boundary:" << dit.boundary() << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
2877                 rend = pm.pos2row(pos);
2878         } else
2879                 rend = pm.pos2row(sl.pos());
2880 #else
2881         size_t rend = pm.pos2row(sl.pos());
2882 #endif
2883         for (size_t rit = 0; rit != rend; ++rit)
2884                 y += pm.rows()[rit].height();
2885         y += pm.rows()[rend].ascent();
2886
2887         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2888
2889         // Make relative position from the nested inset now bufferview absolute.
2890         int xx = bottom_tm.cursorX(dit.bottom(), dit.boundary() && dit.depth() == 1);
2891         x += xx;
2892
2893         // In the RTL case place the nested inset at the left of the cursor in
2894         // the outer paragraph
2895         bool boundary_1 = dit.boundary() && 1 == dit.depth();
2896         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2897         if (rtl)
2898                 x -= lastw;
2899
2900         return Point(x, y);
2901 }
2902
2903
2904 Point BufferView::getPos(DocIterator const & dit) const
2905 {
2906         if (!paragraphVisible(dit))
2907                 return Point(-1, -1);
2908
2909         CursorSlice const & bot = dit.bottom();
2910         TextMetrics const & tm = textMetrics(bot.text());
2911
2912         // offset from outer paragraph
2913         Point p = coordOffset(dit);
2914         p.y_ += tm.parMetrics(bot.pit()).position();
2915         return p;
2916 }
2917
2918
2919 bool BufferView::paragraphVisible(DocIterator const & dit) const
2920 {
2921         CursorSlice const & bot = dit.bottom();
2922         TextMetrics const & tm = textMetrics(bot.text());
2923
2924         return tm.contains(bot.pit());
2925 }
2926
2927
2928 void BufferView::caretPosAndHeight(Point & p, int & h) const
2929 {
2930         Cursor const & cur = cursor();
2931         Font const font = cur.real_current_font;
2932         frontend::FontMetrics const & fm = theFontMetrics(font);
2933         int const asc = fm.maxAscent();
2934         int const des = fm.maxDescent();
2935         h = asc + des;
2936         p = getPos(cur);
2937         p.y_ -= asc;
2938 }
2939
2940
2941 bool BufferView::cursorInView(Point const & p, int h) const
2942 {
2943         Cursor const & cur = cursor();
2944         // does the cursor touch the screen ?
2945         if (p.y_ + h < 0 || p.y_ >= workHeight() || !paragraphVisible(cur))
2946                 return false;
2947         return true;
2948 }
2949
2950
2951 int BufferView::horizScrollOffset() const
2952 {
2953         return d->horiz_scroll_offset_;
2954 }
2955
2956
2957 int BufferView::horizScrollOffset(Text const * text,
2958                                   pit_type pit, pos_type pos) const
2959 {
2960         // Is this a row that is currently scrolled?
2961         if (!d->current_row_slice_.empty()
2962             && &text->inset() == d->current_row_slice_.inset().asInsetText()
2963             && pit ==  d->current_row_slice_.pit()
2964             && pos ==  d->current_row_slice_.pos())
2965                 return d->horiz_scroll_offset_;
2966         return 0;
2967 }
2968
2969
2970 bool BufferView::hadHorizScrollOffset(Text const * text,
2971                                       pit_type pit, pos_type pos) const
2972 {
2973         return !d->last_row_slice_.empty()
2974                && &text->inset() == d->last_row_slice_.inset().asInsetText()
2975                && pit ==  d->last_row_slice_.pit()
2976                && pos ==  d->last_row_slice_.pos();
2977 }
2978
2979
2980 void BufferView::setCurrentRowSlice(CursorSlice const & rowSlice)
2981 {
2982         // nothing to do if the cursor was already on this row
2983         if (d->current_row_slice_ == rowSlice) {
2984                 d->last_row_slice_ = CursorSlice();
2985                 return;
2986         }
2987
2988         // if the (previous) current row was scrolled, we have to
2989         // remember it in order to repaint it next time.
2990         if (d->horiz_scroll_offset_ != 0)
2991                 d->last_row_slice_ = d->current_row_slice_;
2992         else
2993                 d->last_row_slice_ = CursorSlice();
2994
2995         // Since we changed row, the scroll offset is not valid anymore
2996         d->horiz_scroll_offset_ = 0;
2997         d->current_row_slice_ = rowSlice;
2998 }
2999
3000
3001 namespace {
3002
3003 bool sliceInRow(CursorSlice const & cs, Text const * text, Row const & row)
3004 {
3005         /* The normal case is the last line. The previous line takes care
3006          * of empty rows (e.g. empty paragraphs). Cursor boundary issues
3007          * are taken care of when setting caret_slice_ in
3008          * BufferView::draw.
3009          */
3010         return !cs.empty() && cs.text() == text && cs.pit() == row.pit()
3011                && ((row.pos() == row.endpos() && row.pos() == cs.pos())
3012                   || (row.pos() <= cs.pos() && cs.pos() < row.endpos()));
3013 }
3014
3015 }
3016
3017
3018 bool BufferView::needRepaint(Text const * text, Row const & row) const
3019 {
3020         return d->repaint_caret_row_ && sliceInRow(d->caret_slice_, text, row);
3021 }
3022
3023
3024 void BufferView::checkCursorScrollOffset()
3025 {
3026         CursorSlice rowSlice = d->cursor_.bottom();
3027         TextMetrics const & tm = textMetrics(rowSlice.text());
3028
3029         // Stop if metrics have not been computed yet, since it means
3030         // that there is nothing to do.
3031         if (!tm.contains(rowSlice.pit()))
3032                 return;
3033         ParagraphMetrics const & pm = tm.parMetrics(rowSlice.pit());
3034         Row const & row = pm.getRow(rowSlice.pos(),
3035                                     d->cursor_.boundary() && rowSlice == d->cursor_.top());
3036         rowSlice.pos() = row.pos();
3037
3038         // Set the row on which the cursor lives.
3039         setCurrentRowSlice(rowSlice);
3040
3041         // Current x position of the cursor in pixels
3042         int cur_x = getPos(d->cursor_).x_;
3043
3044         // Horizontal scroll offset of the cursor row in pixels
3045         int offset = d->horiz_scroll_offset_;
3046         int const MARGIN = 2 * theFontMetrics(d->cursor_.real_current_font).em()
3047                            + row.right_margin;
3048         if (row.right_x() <= workWidth() - row.right_margin) {
3049                 // Row is narrower than the work area, no offset needed.
3050                 offset = 0;
3051         } else {
3052                 if (cur_x - offset < MARGIN) {
3053                         // cursor would be too far right
3054                         offset = cur_x - MARGIN;
3055                 } else if (cur_x - offset > workWidth() - MARGIN) {
3056                         // cursor would be too far left
3057                         offset = cur_x - workWidth() + MARGIN;
3058                 }
3059                 // Correct the offset to make sure that we do not scroll too much
3060                 if (offset < 0)
3061                         offset = 0;
3062                 if (row.right_x() - offset < workWidth() - row.right_margin)
3063                         offset = row.right_x() - workWidth() + row.right_margin;
3064         }
3065
3066         //lyxerr << "cur_x=" << cur_x << ", offset=" << offset << ", row.wid=" << row.width() << ", margin=" << MARGIN << endl;
3067
3068         if (offset != d->horiz_scroll_offset_)
3069                 LYXERR(Debug::PAINTING, "Horiz. scroll offset changed from "
3070                        << d->horiz_scroll_offset_ << " to " << offset);
3071
3072         if (d->update_strategy_ == NoScreenUpdate
3073             && (offset != d->horiz_scroll_offset_
3074                 || !d->last_row_slice_.empty())) {
3075                 // FIXME: if one uses SingleParUpdate, then home/end
3076                 // will not work on long rows. Why?
3077                 d->update_strategy_ = FullScreenUpdate;
3078         }
3079
3080         d->horiz_scroll_offset_ = offset;
3081 }
3082
3083
3084 void BufferView::draw(frontend::Painter & pain, bool paint_caret)
3085 {
3086         if (height_ == 0 || width_ == 0)
3087                 return;
3088         LYXERR(Debug::PAINTING, (pain.isNull() ? "\t\t--- START NODRAW ---"
3089                                  : "\t\t*** START DRAWING ***"));
3090         Text & text = buffer_.text();
3091         TextMetrics const & tm = d->text_metrics_[&text];
3092         int const y = tm.first().second->position();
3093         PainterInfo pi(this, pain);
3094
3095         /**  A repaint of the previous caret row is needed if there is
3096          *  caret painted on screen and either
3097          *   1/ a new caret has to be painted at a place different from
3098          *      the existing one;
3099          *   2/ there is no need for a caret anymore.
3100          */
3101         d->repaint_caret_row_ = !d->caret_slice_.empty() &&
3102                 ((paint_caret && d->cursor_.top() != d->caret_slice_)
3103                  || ! paint_caret);
3104
3105         // Check whether the row where the cursor lives needs to be scrolled.
3106         // Update the drawing strategy if needed.
3107         checkCursorScrollOffset();
3108
3109         switch (d->update_strategy_) {
3110
3111         case NoScreenUpdate:
3112                 // no screen painting is actually needed. In nodraw stage
3113                 // however, the different coordinates of insets and paragraphs
3114                 // needs to be updated.
3115                 LYXERR(Debug::PAINTING, "Strategy: NoScreenUpdate");
3116                 pi.full_repaint = false;
3117                 if (pain.isNull()) {
3118                         pi.full_repaint = true;
3119                         tm.draw(pi, 0, y);
3120                 } else if (d->repaint_caret_row_) {
3121                         pi.full_repaint = false;
3122                         tm.draw(pi, 0, y);
3123                 }
3124                 break;
3125
3126         case SingleParUpdate:
3127                 pi.full_repaint = false;
3128                 LYXERR(Debug::PAINTING, "Strategy: SingleParUpdate");
3129                 // In general, only the current row of the outermost paragraph
3130                 // will be redrawn. Particular cases where selection spans
3131                 // multiple paragraph are correctly detected in TextMetrics.
3132                 tm.draw(pi, 0, y);
3133                 break;
3134
3135         case DecorationUpdate:
3136                 // FIXME: We should also distinguish DecorationUpdate to avoid text
3137                 // drawing if possible. This is not possible to do easily right now
3138                 // because of the single backing pixmap.
3139
3140         case FullScreenUpdate:
3141
3142                 LYXERR(Debug::PAINTING,
3143                        ((d->update_strategy_ == FullScreenUpdate)
3144                         ? "Strategy: FullScreenUpdate"
3145                         : "Strategy: DecorationUpdate"));
3146
3147                 // The whole screen, including insets, will be refreshed.
3148                 pi.full_repaint = true;
3149
3150                 // Clear background.
3151                 pain.fillRectangle(0, 0, width_, height_,
3152                         pi.backgroundColor(&buffer_.inset()));
3153
3154                 // Draw everything.
3155                 tm.draw(pi, 0, y);
3156
3157                 // and possibly grey out below
3158                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
3159                 int const y2 = lastpm.second->position() + lastpm.second->descent();
3160
3161                 if (y2 < height_) {
3162                         Color color = buffer().isInternal()
3163                                 ? Color_background : Color_bottomarea;
3164                         pain.fillRectangle(0, y2, width_, height_ - y2, color);
3165                 }
3166                 break;
3167         }
3168         LYXERR(Debug::PAINTING, (pain.isNull() ? "\t\t --- END NODRAW ---"
3169                                 : "\t\t *** END DRAWING ***"));
3170
3171         // The scrollbar needs an update.
3172         updateScrollbar();
3173
3174         // Normalize anchor for next time
3175         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
3176         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
3177         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
3178                 ParagraphMetrics const & pm = tm.parMetrics(pit);
3179                 if (pm.position() + pm.descent() > 0) {
3180                         if (d->anchor_pit_ != pit
3181                             || d->anchor_ypos_ != pm.position())
3182                                 LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
3183                                        << "  anchor ypos = " << d->anchor_ypos_);
3184                         d->anchor_pit_ = pit;
3185                         d->anchor_ypos_ = pm.position();
3186                         break;
3187                 }
3188         }
3189         if (!pain.isNull()) {
3190                 // reset the update flags, everything has been done
3191                 d->update_flags_ = Update::None;
3192         }
3193
3194         // Remember what has just been done for the next draw() step
3195         if (paint_caret) {
3196                 d->caret_slice_ = d->cursor_.top();
3197                 if (d->caret_slice_.pos() > 0
3198                     && (d->cursor_.boundary()
3199                         || d->caret_slice_.pos() == d->caret_slice_.lastpos()))
3200                         --d->caret_slice_.pos();
3201         } else
3202                 d->caret_slice_ = CursorSlice();
3203 }
3204
3205
3206 void BufferView::message(docstring const & msg)
3207 {
3208         if (d->gui_)
3209                 d->gui_->message(msg);
3210 }
3211
3212
3213 void BufferView::showDialog(string const & name)
3214 {
3215         if (d->gui_)
3216                 d->gui_->showDialog(name, string());
3217 }
3218
3219
3220 void BufferView::showDialog(string const & name,
3221         string const & data, Inset * inset)
3222 {
3223         if (d->gui_)
3224                 d->gui_->showDialog(name, data, inset);
3225 }
3226
3227
3228 void BufferView::updateDialog(string const & name, string const & data)
3229 {
3230         if (d->gui_)
3231                 d->gui_->updateDialog(name, data);
3232 }
3233
3234
3235 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
3236 {
3237         d->gui_ = gui;
3238 }
3239
3240
3241 // FIXME: Move this out of BufferView again
3242 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
3243 {
3244         if (!fname.isReadableFile()) {
3245                 docstring const error = from_ascii(strerror(errno));
3246                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
3247                 docstring const text =
3248                   bformat(_("Could not read the specified document\n"
3249                             "%1$s\ndue to the error: %2$s"), file, error);
3250                 Alert::error(_("Could not read file"), text);
3251                 return docstring();
3252         }
3253
3254         if (!fname.isReadableFile()) {
3255                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
3256                 docstring const text =
3257                   bformat(_("%1$s\n is not readable."), file);
3258                 Alert::error(_("Could not open file"), text);
3259                 return docstring();
3260         }
3261
3262         // FIXME UNICODE: We don't know the encoding of the file
3263         docstring file_content = fname.fileContents("UTF-8");
3264         if (file_content.empty()) {
3265                 Alert::error(_("Reading not UTF-8 encoded file"),
3266                              _("The file is not UTF-8 encoded.\n"
3267                                "It will be read as local 8Bit-encoded.\n"
3268                                "If this does not give the correct result\n"
3269                                "then please change the encoding of the file\n"
3270                                "to UTF-8 with a program other than LyX.\n"));
3271                 file_content = fname.fileContents("local8bit");
3272         }
3273
3274         return normalize_c(file_content);
3275 }
3276
3277
3278 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
3279 {
3280         docstring const tmpstr = contentsOfPlaintextFile(f);
3281
3282         if (tmpstr.empty())
3283                 return;
3284
3285         Cursor & cur = cursor();
3286         cap::replaceSelection(cur);
3287         buffer_.undo().recordUndo(cur);
3288         if (asParagraph)
3289                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr, cur.current_font);
3290         else
3291                 cur.innerText()->insertStringAsLines(cur, tmpstr, cur.current_font);
3292
3293         buffer_.changed(true);
3294 }
3295
3296
3297 docstring const & BufferView::inlineCompletion() const
3298 {
3299         return d->inlineCompletion_;
3300 }
3301
3302
3303 size_t const & BufferView::inlineCompletionUniqueChars() const
3304 {
3305         return d->inlineCompletionUniqueChars_;
3306 }
3307
3308
3309 DocIterator const & BufferView::inlineCompletionPos() const
3310 {
3311         return d->inlineCompletionPos_;
3312 }
3313
3314
3315 void BufferView::resetInlineCompletionPos()
3316 {
3317         d->inlineCompletionPos_ = DocIterator();
3318 }
3319
3320
3321 bool samePar(DocIterator const & a, DocIterator const & b)
3322 {
3323         if (a.empty() && b.empty())
3324                 return true;
3325         if (a.empty() || b.empty())
3326                 return false;
3327         if (a.depth() != b.depth())
3328                 return false;
3329         return &a.innerParagraph() == &b.innerParagraph();
3330 }
3331
3332
3333 void BufferView::setInlineCompletion(Cursor const & cur, DocIterator const & pos,
3334         docstring const & completion, size_t uniqueChars)
3335 {
3336         uniqueChars = min(completion.size(), uniqueChars);
3337         bool changed = d->inlineCompletion_ != completion
3338                 || d->inlineCompletionUniqueChars_ != uniqueChars;
3339         bool singlePar = true;
3340         d->inlineCompletion_ = completion;
3341         d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
3342
3343         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
3344
3345         // at new position?
3346         DocIterator const & old = d->inlineCompletionPos_;
3347         if (old != pos) {
3348                 //lyxerr << "inlineCompletionPos changed" << std::endl;
3349                 // old or pos are in another paragraph?
3350                 if ((!samePar(cur, pos) && !pos.empty())
3351                     || (!samePar(cur, old) && !old.empty())) {
3352                         singlePar = false;
3353                         //lyxerr << "different paragraph" << std::endl;
3354                 }
3355                 d->inlineCompletionPos_ = pos;
3356         }
3357
3358         // set update flags
3359         if (changed) {
3360                 if (singlePar && !(cur.result().screenUpdate() & Update::Force))
3361                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
3362                 else
3363                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::Force);
3364         }
3365 }
3366
3367
3368 bool BufferView::clickableInset() const
3369 {
3370         return d->clickable_inset_;
3371 }
3372
3373 } // namespace lyx