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/Painter.h"
  74 #include "frontends/Selection.h"
  75
  76 #include "support/convert.h"
  77 #include "support/debug.h"
  78 #include "support/ExceptionMessage.h"
  79 #include "support/filetools.h"
  80 #include "support/gettext.h"
  81 #include "support/lassert.h"
  82 #include "support/lstrings.h"
  83 #include "support/Package.h"
  84 #include "support/types.h"
  85
  86 #include <cerrno>
  87 #include <fstream>
  88 #include <functional>
  89 #include <iterator>
  90 #include <sstream>
  91 #include <vector>
  92
  93 using namespace std;
  94 using namespace lyx::support;
  95
  96 namespace lyx {
  97
  98 namespace Alert = frontend::Alert;
  99
 100 namespace {
 101
 102 /// Return an inset of this class if it exists at the current cursor position
 103 template <class T>
 104 T * getInsetByCode(Cursor const & cur, InsetCode code)
 105 {
 106         DocIterator it = cur;
 107         Inset * inset = it.nextInset();
 108         if (inset && inset->lyxCode() == code)
 109                 return static_cast<T*>(inset);
 110         return 0;
 111 }
 112
 113
 114 /// Note that comparing contents can only be used for InsetCommand
 115 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 116         docstring const & contents)
 117 {
 118         DocIterator tmpdit = dit;
 119
 120         while (tmpdit) {
 121                 Inset const * inset = tmpdit.nextInset();
 122                 if (inset) {
 123                         bool const valid_code = std::find(codes.begin(), codes.end(),
 124                                 inset->lyxCode()) != codes.end();
 125                         InsetCommand const * ic = inset->asInsetCommand();
 126                         bool const same_or_no_contents =  contents.empty()
 127                                 || (ic && (ic->getFirstNonOptParam() == contents));
 128
 129                         if (valid_code && same_or_no_contents) {
 130                                 dit = tmpdit;
 131                                 return true;
 132                         }
 133                 }
 134                 tmpdit.forwardInset();
 135         }
 136
 137         return false;
 138 }
 139
 140
 141 /// Looks for next inset with one of the given codes.
 142 /// Note that same_content can only be used for InsetCommand
 143 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 144         bool same_content)
 145 {
 146         docstring contents;
 147         DocIterator tmpdit = dit;
 148         tmpdit.forwardInset();
 149         if (!tmpdit)
 150                 return false;
 151
 152         Inset const * inset = tmpdit.nextInset();
 153         if (same_content && inset) {
 154                 InsetCommand const * ic = inset->asInsetCommand();
 155                 if (ic) {
 156                         bool const valid_code = std::find(codes.begin(), codes.end(),
 157                                 ic->lyxCode()) != codes.end();
 158                         if (valid_code)
 159                                 contents = ic->getFirstNonOptParam();
 160                 }
 161         }
 162
 163         if (!findNextInset(tmpdit, codes, contents)) {
 164                 if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
 165                         Inset * inset = &tmpdit.bottom().inset();
 166                         tmpdit = doc_iterator_begin(&inset->buffer(), inset);
 167                         if (!findNextInset(tmpdit, codes, contents))
 168                                 return false;
 169                 } else {
 170                         return false;
 171                 }
 172         }
 173
 174         dit = tmpdit;
 175         return true;
 176 }
 177
 178
 179 /// Looks for next inset with the given code
 180 void findInset(DocIterator & dit, InsetCode code, bool same_content)
 181 {
 182         findInset(dit, vector<InsetCode>(1, code), same_content);
 183 }
 184
 185
 186 /// Moves cursor to the next inset with one of the given codes.
 187 void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
 188                bool same_content)
 189 {
 190         Cursor tmpcur = bv->cursor();
 191         if (!findInset(tmpcur, codes, same_content)) {
 192                 bv->cursor().message(_("No more insets"));
 193                 return;
 194         }
 195
 196         tmpcur.clearSelection();
 197         bv->setCursor(tmpcur);
 198         bv->showCursor();
 199 }
 200
 201
 202 /// Moves cursor to the next inset with given code.
 203 void gotoInset(BufferView * bv, InsetCode code, bool same_content)
 204 {
 205         gotoInset(bv, vector<InsetCode>(1, code), same_content);
 206 }
 207
 208
 209 /// A map from a Text to the associated text metrics
 210 typedef map<Text const *, TextMetrics> TextMetricsCache;
 211
 212 enum ScreenUpdateStrategy {
 213         NoScreenUpdate,
 214         SingleParUpdate,
 215         FullScreenUpdate,
 216         DecorationUpdate
 217 };
 218
 219 } // anon namespace
 220
 221
 222 /////////////////////////////////////////////////////////////////////
 223 //
 224 // BufferView
 225 //
 226 /////////////////////////////////////////////////////////////////////
 227
 228 struct BufferView::Private
 229 {
 230         Private(BufferView & bv) : update_strategy_(NoScreenUpdate),
 231                 wh_(0), cursor_(bv),
 232                 anchor_pit_(0), anchor_ypos_(0),
 233                 inlineCompletionUniqueChars_(0),
 234                 last_inset_(0), clickable_inset_(false),
 235                 mouse_position_cache_(),
 236                 bookmark_edit_position_(-1), gui_(0),
 237                 horiz_scroll_offset_(0)
 238         {
 239                 xsel_cache_.set = false;
 240         }
 241
 242         ///
 243         ScrollbarParameters scrollbarParameters_;
 244         ///
 245         ScreenUpdateStrategy update_strategy_;
 246         ///
 247         CoordCache coord_cache_;
 248
 249         /// Estimated average par height for scrollbar.
 250         int wh_;
 251         /// this is used to handle XSelection events in the right manner.
 252         struct {
 253                 CursorSlice cursor;
 254                 CursorSlice anchor;
 255                 bool set;
 256         } xsel_cache_;
 257         ///
 258         Cursor cursor_;
 259         ///
 260         pit_type anchor_pit_;
 261         ///
 262         int anchor_ypos_;
 263         ///
 264         vector<int> par_height_;
 265
 266         ///
 267         DocIterator inlineCompletionPos_;
 268         ///
 269         docstring inlineCompletion_;
 270         ///
 271         size_t inlineCompletionUniqueChars_;
 272
 273         /// keyboard mapping object.
 274         Intl intl_;
 275
 276         /// last visited inset.
 277         /** kept to send setMouseHover(false).
 278           * Not owned, so don't delete.
 279           */
 280         Inset const * last_inset_;
 281         /// are we hovering something that we can click
 282         bool clickable_inset_;
 283
 284         /// position of the mouse at the time of the last mouse move
 285         /// This is used to update the hovering status of inset in
 286         /// cases where the buffer is scrolled, but the mouse didn't move.
 287         Point mouse_position_cache_;
 288
 289         // cache for id of the paragraph which was edited the last time
 290         int bookmark_edit_position_;
 291
 292         mutable TextMetricsCache text_metrics_;
 293
 294         /// Whom to notify.
 295         /** Not owned, so don't delete.
 296           */
 297         frontend::GuiBufferViewDelegate * gui_;
 298
 299         /// Cache for Find Next
 300         FuncRequest search_request_cache_;
 301
 302         ///
 303         map<string, Inset *> edited_insets_;
 304
 305         /// When the row where the cursor lies is scrolled, this
 306         /// contains the scroll offset
 307         int horiz_scroll_offset_;
 308         /// a slice pointing to the start of the row where the cursor
 309         /// is (at last draw time)
 310         CursorSlice current_row_slice_;
 311         /// a slice pointing to the start of the row where cursor was
 312         /// at previous draw event
 313         CursorSlice last_row_slice_;
 314 };
 315
 316
 317 BufferView::BufferView(Buffer & buf)
 318         : width_(0), height_(0), full_screen_(false), buffer_(buf),
 319       d(new Private(*this))
 320 {
 321         d->xsel_cache_.set = false;
 322         d->intl_.initKeyMapper(lyxrc.use_kbmap);
 323
 324         d->cursor_.setBuffer(&buf);
 325         d->cursor_.push(buffer_.inset());
 326         d->cursor_.resetAnchor();
 327         d->cursor_.setCurrentFont();
 328
 329         buffer_.updatePreviews();
 330 }
 331
 332
 333 BufferView::~BufferView()
 334 {
 335         // current buffer is going to be switched-off, save cursor pos
 336         // Ideally, the whole cursor stack should be saved, but session
 337         // currently can only handle bottom (whole document) level pit and pos.
 338         // That is to say, if a cursor is in a nested inset, it will be
 339         // restore to the left of the top level inset.
 340         LastFilePosSection::FilePos fp;
 341         fp.pit = d->cursor_.bottom().pit();
 342         fp.pos = d->cursor_.bottom().pos();
 343         theSession().lastFilePos().save(buffer_.fileName(), fp);
 344
 345         if (d->last_inset_)
 346                 d->last_inset_->setMouseHover(this, false);
 347
 348         delete d;
 349 }
 350
 351
 352 int BufferView::rightMargin() const
 353 {
 354         // The value used to be hardcoded to 10, which is 2.5mm at 100dpi
 355         int const default_margin = Length(2.5, Length::MM).inPixels(0);
 356         // The additional test for the case the outliner is opened.
 357         if (!full_screen_ || !lyxrc.full_screen_limit
 358             || width_ < lyxrc.full_screen_width + 2 * default_margin)
 359                 return default_margin;
 360
 361         return (width_ - lyxrc.full_screen_width) / 2;
 362 }
 363
 364
 365 int BufferView::leftMargin() const
 366 {
 367         return rightMargin();
 368 }
 369
 370
 371 bool BufferView::isTopScreen() const
 372 {
 373         return d->scrollbarParameters_.position == d->scrollbarParameters_.min;
 374 }
 375
 376
 377 bool BufferView::isBottomScreen() const
 378 {
 379         return d->scrollbarParameters_.position == d->scrollbarParameters_.max;
 380 }
 381
 382
 383 Intl & BufferView::getIntl()
 384 {
 385         return d->intl_;
 386 }
 387
 388
 389 Intl const & BufferView::getIntl() const
 390 {
 391         return d->intl_;
 392 }
 393
 394
 395 CoordCache & BufferView::coordCache()
 396 {
 397         return d->coord_cache_;
 398 }
 399
 400
 401 CoordCache const & BufferView::coordCache() const
 402 {
 403         return d->coord_cache_;
 404 }
 405
 406
 407 Buffer & BufferView::buffer()
 408 {
 409         return buffer_;
 410 }
 411
 412
 413 Buffer const & BufferView::buffer() const
 414 {
 415         return buffer_;
 416 }
 417
 418
 419 bool BufferView::needsFitCursor() const
 420 {
 421         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
 422                 frontend::FontMetrics const & fm =
 423                         theFontMetrics(d->cursor_.getFont().fontInfo());
 424                 int const asc = fm.maxAscent();
 425                 int const des = fm.maxDescent();
 426                 Point const p = getPos(d->cursor_);
 427                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 428                         return false;
 429         }
 430         return true;
 431 }
 432
 433
 434 void BufferView::processUpdateFlags(Update::flags flags)
 435 {
 436         // This is close to a hot-path.
 437         LYXERR(Debug::PAINTING, "BufferView::processUpdateFlags()"
 438                 << "[fitcursor = " << (flags & Update::FitCursor)
 439                 << ", forceupdate = " << (flags & Update::Force)
 440                 << ", singlepar = " << (flags & Update::SinglePar)
 441                 << "]  buffer: " << &buffer_);
 442
 443         // FIXME Does this really need doing here? It's done in updateBuffer, and
 444         // if the Buffer doesn't need updating, then do the macros?
 445         buffer_.updateMacros();
 446
 447         // Now do the first drawing step if needed. This consists on updating
 448         // the CoordCache in updateMetrics().
 449         // The second drawing step is done in WorkArea::redraw() if needed.
 450         // FIXME: is this still true now that Buffer::changed() is used all over?
 451
 452         // Case when no explicit update is requested.
 453         if (!flags) {
 454                 // no need to redraw anything.
 455                 d->update_strategy_ = NoScreenUpdate;
 456                 return;
 457         }
 458
 459         if (flags == Update::Decoration) {
 460                 d->update_strategy_ = DecorationUpdate;
 461                 buffer_.changed(false);
 462                 return;
 463         }
 464
 465         if (flags == Update::FitCursor
 466                 || flags == (Update::Decoration | Update::FitCursor)) {
 467                 // tell the frontend to update the screen if needed.
 468                 if (needsFitCursor()) {
 469                         showCursor();
 470                         return;
 471                 }
 472                 if (flags & Update::Decoration) {
 473                         d->update_strategy_ = DecorationUpdate;
 474                         buffer_.changed(false);
 475                         return;
 476                 }
 477                 // no screen update is needed in principle, but this
 478                 // could change if cursor row needs horizontal scrolling.
 479                 d->update_strategy_ = NoScreenUpdate;
 480                 buffer_.changed(false);
 481                 return;
 482         }
 483
 484         bool const full_metrics = flags & Update::Force || !singleParUpdate();
 485
 486         if (full_metrics)
 487                 // We have to update the full screen metrics.
 488                 updateMetrics();
 489
 490         if (!(flags & Update::FitCursor)) {
 491                 // Nothing to do anymore. Trigger a redraw and return
 492                 buffer_.changed(false);
 493                 return;
 494         }
 495
 496         // updateMetrics() does not update paragraph position
 497         // This is done at draw() time. So we need a redraw!
 498         buffer_.changed(false);
 499
 500         if (needsFitCursor()) {
 501                 // The cursor is off screen so ensure it is visible.
 502                 // refresh it:
 503                 showCursor();
 504         }
 505
 506         updateHoveredInset();
 507 }
 508
 509
 510 void BufferView::updateScrollbar()
 511 {
 512         if (height_ == 0 && width_ == 0)
 513                 return;
 514
 515         // We prefer fixed size line scrolling.
 516         d->scrollbarParameters_.single_step = defaultRowHeight();
 517         // We prefer full screen page scrolling.
 518         d->scrollbarParameters_.page_step = height_;
 519
 520         Text & t = buffer_.text();
 521         TextMetrics & tm = d->text_metrics_[&t];
 522
 523         LYXERR(Debug::GUI, " Updating scrollbar: height: "
 524                 << t.paragraphs().size()
 525                 << " curr par: " << d->cursor_.bottom().pit()
 526                 << " default height " << defaultRowHeight());
 527
 528         size_t const parsize = t.paragraphs().size();
 529         if (d->par_height_.size() != parsize) {
 530                 d->par_height_.clear();
 531                 // FIXME: We assume a default paragraph height of 2 rows. This
 532                 // should probably be pondered with the screen width.
 533                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
 534         }
 535
 536         // Look at paragraph heights on-screen
 537         pair<pit_type, ParagraphMetrics const *> first = tm.first();
 538         pair<pit_type, ParagraphMetrics const *> last = tm.last();
 539         for (pit_type pit = first.first; pit <= last.first; ++pit) {
 540                 d->par_height_[pit] = tm.parMetrics(pit).height();
 541                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
 542                         << d->par_height_[pit]);
 543         }
 544
 545         int top_pos = first.second->position() - first.second->ascent();
 546         int bottom_pos = last.second->position() + last.second->descent();
 547         bool first_visible = first.first == 0 && top_pos >= 0;
 548         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
 549         if (first_visible && last_visible) {
 550                 d->scrollbarParameters_.min = 0;
 551                 d->scrollbarParameters_.max = 0;
 552                 return;
 553         }
 554
 555         d->scrollbarParameters_.min = top_pos;
 556         for (size_t i = 0; i != size_t(first.first); ++i)
 557                 d->scrollbarParameters_.min -= d->par_height_[i];
 558         d->scrollbarParameters_.max = bottom_pos;
 559         for (size_t i = last.first + 1; i != parsize; ++i)
 560                 d->scrollbarParameters_.max += d->par_height_[i];
 561
 562         d->scrollbarParameters_.position = 0;
 563         // The reference is the top position so we remove one page.
 564         if (lyxrc.scroll_below_document)
 565                 d->scrollbarParameters_.max -= minVisiblePart();
 566         else
 567                 d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 568 }
 569
 570
 571 ScrollbarParameters const & BufferView::scrollbarParameters() const
 572 {
 573         return d->scrollbarParameters_;
 574 }
 575
 576
 577 docstring BufferView::toolTip(int x, int y) const
 578 {
 579         // Get inset under mouse, if there is one.
 580         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 581         if (!covering_inset)
 582                 // No inset, no tooltip...
 583                 return docstring();
 584         return covering_inset->toolTip(*this, x, y);
 585 }
 586
 587
 588 string BufferView::contextMenu(int x, int y) const
 589 {
 590         //If there is a selection, return the containing inset menu
 591         if (d->cursor_.selection())
 592                 return d->cursor_.inset().contextMenu(*this, x, y);
 593
 594         // Get inset under mouse, if there is one.
 595         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 596         if (covering_inset)
 597                 return covering_inset->contextMenu(*this, x, y);
 598
 599         return buffer_.inset().contextMenu(*this, x, y);
 600 }
 601
 602
 603 void BufferView::scrollDocView(int value, bool update)
 604 {
 605         int const offset = value - d->scrollbarParameters_.position;
 606
 607         // No scrolling at all? No need to redraw anything
 608         if (offset == 0)
 609                 return;
 610
 611         // If the offset is less than 2 screen height, prefer to scroll instead.
 612         if (abs(offset) <= 2 * height_) {
 613                 d->anchor_ypos_ -= offset;
 614                 buffer_.changed(true);
 615                 updateHoveredInset();
 616                 return;
 617         }
 618
 619         // cut off at the top
 620         if (value <= d->scrollbarParameters_.min) {
 621                 DocIterator dit = doc_iterator_begin(&buffer_);
 622                 showCursor(dit, false, update);
 623                 LYXERR(Debug::SCROLLING, "scroll to top");
 624                 return;
 625         }
 626
 627         // cut off at the bottom
 628         if (value >= d->scrollbarParameters_.max) {
 629                 DocIterator dit = doc_iterator_end(&buffer_);
 630                 dit.backwardPos();
 631                 showCursor(dit, false, update);
 632                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 633                 return;
 634         }
 635
 636         // find paragraph at target position
 637         int par_pos = d->scrollbarParameters_.min;
 638         pit_type i = 0;
 639         for (; i != int(d->par_height_.size()); ++i) {
 640                 par_pos += d->par_height_[i];
 641                 if (par_pos >= value)
 642                         break;
 643         }
 644
 645         if (par_pos < value) {
 646                 // It seems we didn't find the correct pit so stay on the safe side and
 647                 // scroll to bottom.
 648                 LYXERR0("scrolling position not found!");
 649                 scrollDocView(d->scrollbarParameters_.max, update);
 650                 return;
 651         }
 652
 653         DocIterator dit = doc_iterator_begin(&buffer_);
 654         dit.pit() = i;
 655         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 656         showCursor(dit, false, update);
 657 }
 658
 659
 660 // FIXME: this method is not working well.
 661 void BufferView::setCursorFromScrollbar()
 662 {
 663         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 664
 665         int const height = 2 * defaultRowHeight();
 666         int const first = height;
 667         int const last = height_ - height;
 668         int newy = 0;
 669         Cursor const & oldcur = d->cursor_;
 670
 671         switch (cursorStatus(oldcur)) {
 672         case CUR_ABOVE:
 673                 newy = first;
 674                 break;
 675         case CUR_BELOW:
 676                 newy = last;
 677                 break;
 678         case CUR_INSIDE:
 679                 int const y = getPos(oldcur).y_;
 680                 newy = min(last, max(y, first));
 681                 if (y == newy)
 682                         return;
 683         }
 684         // We reset the cursor because cursorStatus() does not
 685         // work when the cursor is within mathed.
 686         Cursor cur(*this);
 687         cur.reset();
 688         tm.setCursorFromCoordinates(cur, 0, newy);
 689
 690         // update the bufferview cursor and notify insets
 691         // FIXME: Care about the d->cursor_ flags to redraw if needed
 692         Cursor old = d->cursor_;
 693         mouseSetCursor(cur);
 694         // the DEPM call in mouseSetCursor() might have destroyed the
 695         // paragraph the cursor is in.
 696         bool badcursor = old.fixIfBroken();
 697         badcursor |= notifyCursorLeavesOrEnters(old, d->cursor_);
 698         if (badcursor)
 699                 d->cursor_.fixIfBroken();
 700 }
 701
 702
 703 Change const BufferView::getCurrentChange() const
 704 {
 705         if (!d->cursor_.selection())
 706                 return Change(Change::UNCHANGED);
 707
 708         DocIterator dit = d->cursor_.selectionBegin();
 709         // The selected content might have been changed (see #7685)
 710         dit = dit.getInnerText();
 711         return dit.paragraph().lookupChange(dit.pos());
 712 }
 713
 714
 715 // this could be used elsewhere as well?
 716 // FIXME: This does not work within mathed!
 717 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 718 {
 719         Point const p = getPos(dit);
 720         if (p.y_ < 0)
 721                 return CUR_ABOVE;
 722         if (p.y_ > workHeight())
 723                 return CUR_BELOW;
 724         return CUR_INSIDE;
 725 }
 726
 727
 728 void BufferView::bookmarkEditPosition()
 729 {
 730         // Don't eat cpu time for each keystroke
 731         if (d->cursor_.paragraph().id() == d->bookmark_edit_position_)
 732                 return;
 733         saveBookmark(0);
 734         d->bookmark_edit_position_ = d->cursor_.paragraph().id();
 735 }
 736
 737
 738 void BufferView::saveBookmark(unsigned int idx)
 739 {
 740         // tentatively save bookmark, id and pos will be used to
 741         // acturately locate a bookmark in a 'live' lyx session.
 742         // pit and pos will be updated with bottom level pit/pos
 743         // when lyx exits.
 744         if (!buffer_.isInternal()) {
 745                 theSession().bookmarks().save(
 746                         buffer_.fileName(),
 747                         d->cursor_.bottom().pit(),
 748                         d->cursor_.bottom().pos(),
 749                         d->cursor_.paragraph().id(),
 750                         d->cursor_.pos(),
 751                         idx
 752                         );
 753                 if (idx)
 754                         // emit message signal.
 755                         message(_("Save bookmark"));
 756         }
 757 }
 758
 759
 760 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 761         int top_id, pos_type top_pos)
 762 {
 763         bool success = false;
 764         DocIterator dit;
 765
 766         d->cursor_.clearSelection();
 767
 768         // if a valid par_id is given, try it first
 769         // This is the case for a 'live' bookmark when unique paragraph ID
 770         // is used to track bookmarks.
 771         if (top_id > 0) {
 772                 dit = buffer_.getParFromID(top_id);
 773                 if (!dit.atEnd()) {
 774                         dit.pos() = min(dit.paragraph().size(), top_pos);
 775                         // Some slices of the iterator may not be
 776                         // reachable (e.g. closed collapsable inset)
 777                         // so the dociterator may need to be
 778                         // shortened. Otherwise, setCursor may crash
 779                         // lyx when the cursor can not be set to these
 780                         // insets.
 781                         size_t const n = dit.depth();
 782                         for (size_t i = 0; i < n; ++i)
 783                                 if (!dit[i].inset().editable()) {
 784                                         dit.resize(i);
 785                                         break;
 786                                 }
 787                         success = true;
 788                 }
 789         }
 790
 791         // if top_id == 0, or searching through top_id failed
 792         // This is the case for a 'restored' bookmark when only bottom
 793         // (document level) pit was saved. Because of this, bookmark
 794         // restoration is inaccurate. If a bookmark was within an inset,
 795         // it will be restored to the left of the outmost inset that contains
 796         // the bookmark.
 797         if (bottom_pit < int(buffer_.paragraphs().size())) {
 798                 dit = doc_iterator_begin(&buffer_);
 799
 800                 dit.pit() = bottom_pit;
 801                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 802                 success = true;
 803         }
 804
 805         if (success) {
 806                 // Note: only bottom (document) level pit is set.
 807                 setCursor(dit);
 808                 // set the current font.
 809                 d->cursor_.setCurrentFont();
 810                 // Do not forget to reset the anchor (see #9912)
 811                 d->cursor_.resetAnchor();
 812                 // To center the screen on this new position we need the
 813                 // paragraph position which is computed at draw() time.
 814                 // So we need a redraw!
 815                 buffer_.changed(false);
 816                 if (needsFitCursor())
 817                         showCursor();
 818         }
 819
 820         return success;
 821 }
 822
 823
 824 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 825 {
 826         if (d->cursor_.real_current_font.isRightToLeft()) {
 827                 if (d->intl_.keymap == Intl::PRIMARY)
 828                         d->intl_.keyMapSec();
 829         } else {
 830                 if (d->intl_.keymap == Intl::SECONDARY)
 831                         d->intl_.keyMapPrim();
 832         }
 833
 834         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 835 }
 836
 837
 838 int BufferView::workWidth() const
 839 {
 840         return width_;
 841 }
 842
 843
 844 void BufferView::recenter()
 845 {
 846         showCursor(d->cursor_, true, true);
 847 }
 848
 849
 850 void BufferView::showCursor()
 851 {
 852         showCursor(d->cursor_, false, true);
 853 }
 854
 855
 856 void BufferView::showCursor(DocIterator const & dit,
 857         bool recenter, bool update)
 858 {
 859         if (scrollToCursor(dit, recenter) && update) {
 860                 buffer_.changed(true);
 861                 updateHoveredInset();
 862         }
 863 }
 864
 865
 866 void BufferView::scrollToCursor()
 867 {
 868         if (scrollToCursor(d->cursor_, false)) {
 869                 buffer_.changed(true);
 870                 updateHoveredInset();
 871         }
 872 }
 873
 874
 875 bool BufferView::scrollToCursor(DocIterator const & dit, bool recenter)
 876 {
 877         // We are not properly started yet, delay until resizing is
 878         // done.
 879         if (height_ == 0)
 880                 return false;
 881
 882         LYXERR(Debug::SCROLLING, "recentering!");
 883
 884         CursorSlice const & bot = dit.bottom();
 885         TextMetrics & tm = d->text_metrics_[bot.text()];
 886
 887         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 888         int bot_pit = bot.pit();
 889         if (bot_pit > max_pit) {
 890                 // FIXME: Why does this happen?
 891                 LYXERR0("bottom pit is greater that max pit: "
 892                         << bot_pit << " > " << max_pit);
 893                 bot_pit = max_pit;
 894         }
 895
 896         if (bot_pit == tm.first().first - 1)
 897                 tm.newParMetricsUp();
 898         else if (bot_pit == tm.last().first + 1)
 899                 tm.newParMetricsDown();
 900
 901         if (tm.contains(bot_pit)) {
 902                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 903                 LBUFERR(!pm.rows().empty());
 904                 // FIXME: smooth scrolling doesn't work in mathed.
 905                 CursorSlice const & cs = dit.innerTextSlice();
 906                 int offset = coordOffset(dit).y_;
 907                 int ypos = pm.position() + offset;
 908                 Dimension const & row_dim =
 909                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 910                 int scrolled = 0;
 911                 if (recenter)
 912                         scrolled = scroll(ypos - height_/2);
 913
 914                 // We try to visualize the whole row, if the row height is larger than
 915                 // the screen height, we scroll to a heuristic value of height_ / 4.
 916                 // FIXME: This heuristic value should be replaced by a recursive search
 917                 // for a row in the inset that can be visualized completely.
 918                 else if (row_dim.height() > height_) {
 919                         if (ypos < defaultRowHeight())
 920                                 scrolled = scroll(ypos - height_ / 4);
 921                         else if (ypos > height_ - defaultRowHeight())
 922                                 scrolled = scroll(ypos - 3 * height_ / 4);
 923                 }
 924
 925                 // If the top part of the row falls of the screen, we scroll
 926                 // up to align the top of the row with the top of the screen.
 927                 else if (ypos - row_dim.ascent() < 0 && ypos < height_) {
 928                         int ynew = row_dim.ascent();
 929                         scrolled = scrollUp(ynew - ypos);
 930                 }
 931
 932                 // If the bottom of the row falls of the screen, we scroll down.
 933                 else if (ypos + row_dim.descent() > height_ && ypos > 0) {
 934                         int ynew = height_ - row_dim.descent();
 935                         scrolled = scrollDown(ypos - ynew);
 936                 }
 937
 938                 // else, nothing to do, the cursor is already visible so we just return.
 939                 return scrolled != 0;
 940         }
 941
 942         // fix inline completion position
 943         if (d->inlineCompletionPos_.fixIfBroken())
 944                 d->inlineCompletionPos_ = DocIterator();
 945
 946         tm.redoParagraph(bot_pit);
 947         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 948         int offset = coordOffset(dit).y_;
 949
 950         d->anchor_pit_ = bot_pit;
 951         CursorSlice const & cs = dit.innerTextSlice();
 952         Dimension const & row_dim =
 953                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 954
 955         if (recenter)
 956                 d->anchor_ypos_ = height_/2;
 957         else if (d->anchor_pit_ == 0)
 958                 d->anchor_ypos_ = offset + pm.ascent();
 959         else if (d->anchor_pit_ == max_pit)
 960                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
 961         else if (offset > height_)
 962                 d->anchor_ypos_ = height_ - offset - defaultRowHeight();
 963         else
 964                 d->anchor_ypos_ = defaultRowHeight() * 2;
 965
 966         return true;
 967 }
 968
 969
 970 void BufferView::makeDocumentClass()
 971 {
 972         DocumentClassConstPtr olddc = buffer_.params().documentClassPtr();
 973         buffer_.params().makeDocumentClass();
 974         updateDocumentClass(olddc);
 975 }
 976
 977
 978 void BufferView::updateDocumentClass(DocumentClassConstPtr olddc)
 979 {
 980         message(_("Converting document to new document class..."));
 981
 982         StableDocIterator backcur(d->cursor_);
 983         ErrorList & el = buffer_.errorList("Class Switch");
 984         cap::switchBetweenClasses(
 985                         olddc, buffer_.params().documentClassPtr(),
 986                         static_cast<InsetText &>(buffer_.inset()), el);
 987
 988         setCursor(backcur.asDocIterator(&buffer_));
 989
 990         buffer_.errors("Class Switch");
 991 }
 992
 993
 994 /** Return the change status at cursor position, taking into account the
 995  * status at each level of the document iterator (a table in a deleted
 996  * footnote is deleted).
 997  * When \param outer is true, the top slice is not looked at.
 998  */
 999 static Change::Type lookupChangeType(DocIterator const & dit, bool outer = false)
1000 {
1001         size_t const depth = dit.depth() - (outer ? 1 : 0);
1002
1003         for (size_t i = 0 ; i < depth ; ++i) {
1004                 CursorSlice const & slice = dit[i];
1005                 if (!slice.inset().inMathed()
1006                     && slice.pos() < slice.paragraph().size()) {
1007                         Change::Type const ch = slice.paragraph().lookupChange(slice.pos()).type;
1008                         if (ch != Change::UNCHANGED)
1009                                 return ch;
1010                 }
1011         }
1012         return Change::UNCHANGED;
1013 }
1014
1015
1016 bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
1017 {
1018         FuncCode const act = cmd.action();
1019
1020         // Can we use a readonly buffer?
1021         if (buffer_.isReadonly()
1022             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
1023             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
1024                 flag.message(from_utf8(N_("Document is read-only")));
1025                 flag.setEnabled(false);
1026                 return true;
1027         }
1028
1029         // Are we in a DELETED change-tracking region?
1030         if (lookupChangeType(d->cursor_, true) == Change::DELETED
1031             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
1032             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
1033                 flag.message(from_utf8(N_("This portion of the document is deleted.")));
1034                 flag.setEnabled(false);
1035                 return true;
1036         }
1037
1038         Cursor & cur = d->cursor_;
1039
1040         if (cur.getStatus(cmd, flag))
1041                 return true;
1042
1043         switch (act) {
1044
1045         // FIXME: This is a bit problematic because we don't check if this is
1046         // a document BufferView or not for these LFUNs. We probably have to
1047         // dispatch both to currentBufferView() and, if that fails,
1048         // to documentBufferView(); same as we do now for current Buffer and
1049         // document Buffer. Ideally those LFUN should go to Buffer as they
1050         // operate on the full Buffer and the cursor is only needed either for
1051         // an Undo record or to restore a cursor position. But we don't know
1052         // how to do that inside Buffer of course.
1053         case LFUN_BUFFER_PARAMS_APPLY:
1054         case LFUN_LAYOUT_MODULES_CLEAR:
1055         case LFUN_LAYOUT_MODULE_ADD:
1056         case LFUN_LAYOUT_RELOAD:
1057         case LFUN_TEXTCLASS_APPLY:
1058         case LFUN_TEXTCLASS_LOAD:
1059                 flag.setEnabled(!buffer_.isReadonly());
1060                 break;
1061
1062         case LFUN_UNDO:
1063                 // We do not use the LyXAction flag for readonly because Undo sets the
1064                 // buffer clean/dirty status by itself.
1065                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasUndoStack());
1066                 break;
1067         case LFUN_REDO:
1068                 // We do not use the LyXAction flag for readonly because Redo sets the
1069                 // buffer clean/dirty status by itself.
1070                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasRedoStack());
1071                 break;
1072         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
1073         case LFUN_FILE_INSERT_PLAINTEXT: {
1074                 docstring const fname = cmd.argument();
1075                 if (!FileName::isAbsolute(to_utf8(fname))) {
1076                         flag.message(_("Absolute filename expected."));
1077                         return false;
1078                 }
1079                 flag.setEnabled(cur.inTexted());
1080                 break;
1081         }
1082         case LFUN_FILE_INSERT:
1083         case LFUN_BOOKMARK_SAVE:
1084                 // FIXME: Actually, these LFUNS should be moved to Text
1085                 flag.setEnabled(cur.inTexted());
1086                 break;
1087
1088         case LFUN_FONT_STATE:
1089         case LFUN_LABEL_INSERT:
1090         case LFUN_INFO_INSERT:
1091         case LFUN_PARAGRAPH_GOTO:
1092         case LFUN_NOTE_NEXT:
1093         case LFUN_REFERENCE_NEXT:
1094         case LFUN_WORD_FIND:
1095         case LFUN_WORD_FIND_FORWARD:
1096         case LFUN_WORD_FIND_BACKWARD:
1097         case LFUN_WORD_REPLACE:
1098         case LFUN_MARK_OFF:
1099         case LFUN_MARK_ON:
1100         case LFUN_MARK_TOGGLE:
1101         case LFUN_SCREEN_RECENTER:
1102         case LFUN_SCREEN_SHOW_CURSOR:
1103         case LFUN_BIBTEX_DATABASE_ADD:
1104         case LFUN_BIBTEX_DATABASE_DEL:
1105         case LFUN_STATISTICS:
1106         case LFUN_KEYMAP_OFF:
1107         case LFUN_KEYMAP_PRIMARY:
1108         case LFUN_KEYMAP_SECONDARY:
1109         case LFUN_KEYMAP_TOGGLE:
1110         case LFUN_INSET_SELECT_ALL:
1111                 flag.setEnabled(true);
1112                 break;
1113
1114         case LFUN_WORD_FINDADV: {
1115                 FindAndReplaceOptions opt;
1116                 istringstream iss(to_utf8(cmd.argument()));
1117                 iss >> opt;
1118                 flag.setEnabled(opt.repl_buf_name.empty()
1119                                 || !buffer_.isReadonly());
1120                 break;
1121         }
1122
1123         case LFUN_LABEL_GOTO:
1124                 flag.setEnabled(!cmd.argument().empty()
1125                     || getInsetByCode<InsetRef>(cur, REF_CODE));
1126                 break;
1127
1128         case LFUN_CHANGES_MERGE:
1129         case LFUN_CHANGE_NEXT:
1130         case LFUN_CHANGE_PREVIOUS:
1131         case LFUN_ALL_CHANGES_ACCEPT:
1132         case LFUN_ALL_CHANGES_REJECT:
1133                 // TODO: context-sensitive enabling of LFUNs
1134                 // In principle, these command should only be enabled if there
1135                 // is a change in the document. However, without proper
1136                 // optimizations, this will inevitably result in poor performance.
1137                 flag.setEnabled(true);
1138                 break;
1139
1140         case LFUN_SCREEN_UP:
1141         case LFUN_SCREEN_DOWN:
1142         case LFUN_SCROLL:
1143         case LFUN_SCREEN_UP_SELECT:
1144         case LFUN_SCREEN_DOWN_SELECT:
1145         case LFUN_INSET_FORALL:
1146                 flag.setEnabled(true);
1147                 break;
1148
1149         case LFUN_LAYOUT_TABULAR:
1150                 flag.setEnabled(cur.innerInsetOfType(TABULAR_CODE));
1151                 break;
1152
1153         case LFUN_LAYOUT:
1154                 flag.setEnabled(!cur.inset().forcePlainLayout(cur.idx()));
1155                 break;
1156
1157         case LFUN_LAYOUT_PARAGRAPH:
1158                 flag.setEnabled(cur.inset().allowParagraphCustomization(cur.idx()));
1159                 break;
1160
1161         case LFUN_BRANCH_ADD_INSERT:
1162                 flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
1163                 break;
1164
1165         case LFUN_DIALOG_SHOW_NEW_INSET:
1166                 // FIXME: this is wrong, but I do not understand the
1167                 // intent (JMarc)
1168                 if (cur.inset().lyxCode() == CAPTION_CODE)
1169                         return cur.inset().getStatus(cur, cmd, flag);
1170                 // FIXME we should consider passthru paragraphs too.
1171                 flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
1172                 break;
1173
1174         case LFUN_CITATION_INSERT: {
1175                 FuncRequest fr(LFUN_INSET_INSERT, "citation");
1176                 // FIXME: This could turn in a recursive hell.
1177                 // Shouldn't we use Buffer::getStatus() instead?
1178                 flag.setEnabled(lyx::getStatus(fr).enabled());
1179                 break;
1180         }
1181         case LFUN_INSET_APPLY: {
1182                 string const name = cmd.getArg(0);
1183                 Inset * inset = editedInset(name);
1184                 if (inset) {
1185                         FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1186                         if (!inset->getStatus(cur, fr, flag)) {
1187                                 // Every inset is supposed to handle this
1188                                 LASSERT(false, break);
1189                         }
1190                 } else {
1191                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1192                         flag = lyx::getStatus(fr);
1193                 }
1194                 break;
1195         }
1196
1197         default:
1198                 return false;
1199         }
1200
1201         return true;
1202 }
1203
1204
1205 Inset * BufferView::editedInset(string const & name) const
1206 {
1207         map<string, Inset *>::const_iterator it = d->edited_insets_.find(name);
1208         return it == d->edited_insets_.end() ? 0 : it->second;
1209 }
1210
1211
1212 void BufferView::editInset(string const & name, Inset * inset)
1213 {
1214         d->edited_insets_[name] = inset;
1215 }
1216
1217
1218 void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
1219 {
1220         LYXERR(Debug::ACTION, "BufferView::dispatch: cmd: " << cmd);
1221
1222         string const argument = to_utf8(cmd.argument());
1223         Cursor & cur = d->cursor_;
1224         Cursor old = cur;
1225
1226         // Don't dispatch function that does not apply to internal buffers.
1227         if (buffer_.isInternal()
1228             && lyxaction.funcHasFlag(cmd.action(), LyXAction::NoInternal))
1229                 return;
1230
1231         // We'll set this back to false if need be.
1232         bool dispatched = true;
1233         buffer_.undo().beginUndoGroup();
1234
1235         FuncCode const act = cmd.action();
1236         switch (act) {
1237
1238         case LFUN_BUFFER_PARAMS_APPLY: {
1239                 DocumentClassConstPtr olddc = buffer_.params().documentClassPtr();
1240                 cur.recordUndoBufferParams();
1241                 istringstream ss(to_utf8(cmd.argument()));
1242                 Lexer lex;
1243                 lex.setStream(ss);
1244                 int const unknown_tokens = buffer_.readHeader(lex);
1245                 if (unknown_tokens != 0) {
1246                         LYXERR0("Warning in LFUN_BUFFER_PARAMS_APPLY!\n"
1247                                                 << unknown_tokens << " unknown token"
1248                                                 << (unknown_tokens == 1 ? "" : "s"));
1249                 }
1250                 updateDocumentClass(olddc);
1251
1252                 // We are most certainly here because of a change in the document
1253                 // It is then better to make sure that all dialogs are in sync with
1254                 // current document settings.
1255                 dr.screenUpdate(Update::Force | Update::FitCursor);
1256                 dr.forceBufferUpdate();
1257                 break;
1258         }
1259
1260         case LFUN_LAYOUT_MODULES_CLEAR: {
1261                 // FIXME: this modifies the document in cap::switchBetweenClasses
1262                 //  without calling recordUndo. Fix this before using
1263                 //  recordUndoBufferParams().
1264                 cur.recordUndoFullBuffer();
1265                 buffer_.params().clearLayoutModules();
1266                 makeDocumentClass();
1267                 dr.screenUpdate(Update::Force);
1268                 dr.forceBufferUpdate();
1269                 break;
1270         }
1271
1272         case LFUN_LAYOUT_MODULE_ADD: {
1273                 BufferParams const & params = buffer_.params();
1274                 if (!params.layoutModuleCanBeAdded(argument)) {
1275                         LYXERR0("Module `" << argument <<
1276                                 "' cannot be added due to failed requirements or "
1277                                 "conflicts with installed modules.");
1278                         break;
1279                 }
1280                 // FIXME: this modifies the document in cap::switchBetweenClasses
1281                 //  without calling recordUndo. Fix this before using
1282                 //  recordUndoBufferParams().
1283                 cur.recordUndoFullBuffer();
1284                 buffer_.params().addLayoutModule(argument);
1285                 makeDocumentClass();
1286                 dr.screenUpdate(Update::Force);
1287                 dr.forceBufferUpdate();
1288                 break;
1289         }
1290
1291         case LFUN_TEXTCLASS_APPLY: {
1292                 // since this shortcircuits, the second call is made only if
1293                 // the first fails
1294                 bool const success =
1295                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1296                         LayoutFileList::get().load(argument, buffer_.filePath());
1297                 if (!success) {
1298                         docstring s = bformat(_("The document class `%1$s' "
1299                                                  "could not be loaded."), from_utf8(argument));
1300                         frontend::Alert::error(_("Could not load class"), s);
1301                         break;
1302                 }
1303
1304                 LayoutFile const * old_layout = buffer_.params().baseClass();
1305                 LayoutFile const * new_layout = &(LayoutFileList::get()[argument]);
1306
1307                 if (old_layout == new_layout)
1308                         // nothing to do
1309                         break;
1310
1311                 // Save the old, possibly modular, layout for use in conversion.
1312                 // FIXME: this modifies the document in cap::switchBetweenClasses
1313                 //  without calling recordUndo. Fix this before using
1314                 //  recordUndoBufferParams().
1315                 cur.recordUndoFullBuffer();
1316                 buffer_.params().setBaseClass(argument);
1317                 makeDocumentClass();
1318                 dr.screenUpdate(Update::Force);
1319                 dr.forceBufferUpdate();
1320                 break;
1321         }
1322
1323         case LFUN_TEXTCLASS_LOAD: {
1324                 // since this shortcircuits, the second call is made only if
1325                 // the first fails
1326                 bool const success =
1327                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1328                         LayoutFileList::get().load(argument, buffer_.filePath());
1329                 if (!success) {
1330                         docstring s = bformat(_("The document class `%1$s' "
1331                                                  "could not be loaded."), from_utf8(argument));
1332                         frontend::Alert::error(_("Could not load class"), s);
1333                 }
1334                 break;
1335         }
1336
1337         case LFUN_LAYOUT_RELOAD: {
1338                 LayoutFileIndex bc = buffer_.params().baseClassID();
1339                 LayoutFileList::get().reset(bc);
1340                 buffer_.params().setBaseClass(bc);
1341                 makeDocumentClass();
1342                 dr.screenUpdate(Update::Force);
1343                 dr.forceBufferUpdate();
1344                 break;
1345         }
1346
1347         case LFUN_UNDO:
1348                 dr.setMessage(_("Undo"));
1349                 cur.clearSelection();
1350                 if (!cur.textUndo())
1351                         dr.setMessage(_("No further undo information"));
1352                 else
1353                         dr.screenUpdate(Update::Force | Update::FitCursor);
1354                 dr.forceBufferUpdate();
1355                 break;
1356
1357         case LFUN_REDO:
1358                 dr.setMessage(_("Redo"));
1359                 cur.clearSelection();
1360                 if (!cur.textRedo())
1361                         dr.setMessage(_("No further redo information"));
1362                 else
1363                         dr.screenUpdate(Update::Force | Update::FitCursor);
1364                 dr.forceBufferUpdate();
1365                 break;
1366
1367         case LFUN_FONT_STATE:
1368                 dr.setMessage(cur.currentState());
1369                 break;
1370
1371         case LFUN_BOOKMARK_SAVE:
1372                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1373                 break;
1374
1375         case LFUN_LABEL_GOTO: {
1376                 docstring label = cmd.argument();
1377                 if (label.empty()) {
1378                         InsetRef * inset =
1379                                 getInsetByCode<InsetRef>(cur, REF_CODE);
1380                         if (inset) {
1381                                 label = inset->getParam("reference");
1382                                 // persistent=false: use temp_bookmark
1383                                 saveBookmark(0);
1384                         }
1385                 }
1386                 if (!label.empty()) {
1387                         gotoLabel(label);
1388                         // at the moment, this is redundant, since gotoLabel will
1389                         // eventually call LFUN_PARAGRAPH_GOTO, but it seems best
1390                         // to have it here.
1391                         dr.screenUpdate(Update::Force | Update::FitCursor);
1392                 }
1393                 break;
1394         }
1395
1396         case LFUN_PARAGRAPH_GOTO: {
1397                 int const id = convert<int>(cmd.getArg(0));
1398                 int const pos = convert<int>(cmd.getArg(1));
1399                 int i = 0;
1400                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1401                         b = theBufferList().next(b)) {
1402
1403                         Cursor cur(*this);
1404                         cur.setCursor(b->getParFromID(id));
1405                         if (cur.atEnd()) {
1406                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1407                                 ++i;
1408                                 continue;
1409                         }
1410                         LYXERR(Debug::INFO, "Paragraph " << cur.paragraph().id()
1411                                 << " found in buffer `"
1412                                 << b->absFileName() << "'.");
1413
1414                         if (b == &buffer_) {
1415                                 // Set the cursor
1416                                 cur.pos() = pos;
1417                                 mouseSetCursor(cur);
1418                                 dr.screenUpdate(Update::Force | Update::FitCursor);
1419                         } else {
1420                                 // Switch to other buffer view and resend cmd
1421                                 lyx::dispatch(FuncRequest(
1422                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1423                                 lyx::dispatch(cmd);
1424                         }
1425                         break;
1426                 }
1427                 break;
1428         }
1429
1430         case LFUN_NOTE_NEXT:
1431                 gotoInset(this, NOTE_CODE, false);
1432                 break;
1433
1434         case LFUN_REFERENCE_NEXT: {
1435                 vector<InsetCode> tmp;
1436                 tmp.push_back(LABEL_CODE);
1437                 tmp.push_back(REF_CODE);
1438                 gotoInset(this, tmp, true);
1439                 break;
1440         }
1441
1442         case LFUN_CHANGE_NEXT:
1443                 findNextChange(this);
1444                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1445                 dr.screenUpdate(Update::Force | Update::FitCursor);
1446                 break;
1447
1448         case LFUN_CHANGE_PREVIOUS:
1449                 findPreviousChange(this);
1450                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1451                 dr.screenUpdate(Update::Force | Update::FitCursor);
1452                 break;
1453
1454         case LFUN_CHANGES_MERGE:
1455                 if (findNextChange(this) || findPreviousChange(this)) {
1456                         dr.screenUpdate(Update::Force | Update::FitCursor);
1457                         dr.forceBufferUpdate();
1458                         showDialog("changes");
1459                 }
1460                 break;
1461
1462         case LFUN_ALL_CHANGES_ACCEPT:
1463                 // select complete document
1464                 cur.reset();
1465                 cur.selHandle(true);
1466                 buffer_.text().cursorBottom(cur);
1467                 // accept everything in a single step to support atomic undo
1468                 buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
1469                 cur.resetAnchor();
1470                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1471                 dr.screenUpdate(Update::Force | Update::FitCursor);
1472                 dr.forceBufferUpdate();
1473                 break;
1474
1475         case LFUN_ALL_CHANGES_REJECT:
1476                 // select complete document
1477                 cur.reset();
1478                 cur.selHandle(true);
1479                 buffer_.text().cursorBottom(cur);
1480                 // reject everything in a single step to support atomic undo
1481                 // Note: reject does not work recursively; the user may have to repeat the operation
1482                 buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
1483                 cur.resetAnchor();
1484                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1485                 dr.screenUpdate(Update::Force | Update::FitCursor);
1486                 dr.forceBufferUpdate();
1487                 break;
1488
1489         case LFUN_WORD_FIND_FORWARD:
1490         case LFUN_WORD_FIND_BACKWARD: {
1491                 // FIXME THREAD
1492                 // Would it maybe be better if this variable were view specific anyway?
1493                 static docstring last_search;
1494                 docstring searched_string;
1495
1496                 if (!cmd.argument().empty()) {
1497                         last_search = cmd.argument();
1498                         searched_string = cmd.argument();
1499                 } else {
1500                         searched_string = last_search;
1501                 }
1502
1503                 if (searched_string.empty())
1504                         break;
1505
1506                 bool const fw = act == LFUN_WORD_FIND_FORWARD;
1507                 docstring const data =
1508                         find2string(searched_string, true, false, fw);
1509                 bool found = lyxfind(this, FuncRequest(LFUN_WORD_FIND, data));
1510                 if (found) {
1511                         dr.screenUpdate(Update::Force | Update::FitCursor);
1512                         cur.dispatched();
1513                         dispatched = true;
1514                 } else {
1515                         cur.undispatched();
1516                         dispatched = false;
1517                 }
1518                 break;
1519         }
1520
1521         case LFUN_WORD_FIND: {
1522                 FuncRequest req = cmd;
1523                 if (cmd.argument().empty() && !d->search_request_cache_.argument().empty())
1524                         req = d->search_request_cache_;
1525                 if (req.argument().empty()) {
1526                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
1527                         break;
1528                 }
1529                 if (lyxfind(this, req)) {
1530                         dr.screenUpdate(Update::Force | Update::FitCursor);
1531                         cur.dispatched();
1532                         dispatched = true;
1533                 } else {
1534                         cur.undispatched();
1535                         dispatched = false;
1536                 }
1537                 d->search_request_cache_ = req;
1538                 break;
1539         }
1540
1541         case LFUN_WORD_REPLACE: {
1542                 bool has_deleted = false;
1543                 if (cur.selection()) {
1544                         DocIterator beg = cur.selectionBegin();
1545                         DocIterator end = cur.selectionEnd();
1546                         if (beg.pit() == end.pit()) {
1547                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1548                                         if (!cur.inMathed() && cur.paragraph().isDeleted(p)) {
1549                                                 has_deleted = true;
1550                                                 break;
1551                                         }
1552                                 }
1553                         }
1554                 }
1555                 if (lyxreplace(this, cmd, has_deleted)) {
1556                         dr.forceBufferUpdate();
1557                         dr.screenUpdate(Update::Force | Update::FitCursor);
1558                         cur.dispatched();
1559                         dispatched = true;
1560                 } else {
1561                         cur.undispatched();
1562                         dispatched = false;
1563                 }
1564                 break;
1565         }
1566
1567         case LFUN_WORD_FINDADV: {
1568                 FindAndReplaceOptions opt;
1569                 istringstream iss(to_utf8(cmd.argument()));
1570                 iss >> opt;
1571                 if (findAdv(this, opt)) {
1572                         dr.screenUpdate(Update::Force | Update::FitCursor);
1573                         cur.dispatched();
1574                         dispatched = true;
1575                 } else {
1576                         cur.undispatched();
1577                         dispatched = false;
1578                 }
1579                 break;
1580         }
1581
1582         case LFUN_MARK_OFF:
1583                 cur.clearSelection();
1584                 dr.setMessage(from_utf8(N_("Mark off")));
1585                 break;
1586
1587         case LFUN_MARK_ON:
1588                 cur.clearSelection();
1589                 cur.setMark(true);
1590                 dr.setMessage(from_utf8(N_("Mark on")));
1591                 break;
1592
1593         case LFUN_MARK_TOGGLE:
1594                 cur.setSelection(false);
1595                 if (cur.mark()) {
1596                         cur.setMark(false);
1597                         dr.setMessage(from_utf8(N_("Mark removed")));
1598                 } else {
1599                         cur.setMark(true);
1600                         dr.setMessage(from_utf8(N_("Mark set")));
1601                 }
1602                 cur.resetAnchor();
1603                 break;
1604
1605         case LFUN_SCREEN_SHOW_CURSOR:
1606                 showCursor();
1607                 break;
1608
1609         case LFUN_SCREEN_RECENTER:
1610                 recenter();
1611                 break;
1612
1613         case LFUN_BIBTEX_DATABASE_ADD: {
1614                 Cursor tmpcur = cur;
1615                 findInset(tmpcur, BIBTEX_CODE, false);
1616                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1617                                                 BIBTEX_CODE);
1618                 if (inset) {
1619                         if (inset->addDatabase(cmd.argument())) {
1620                                 buffer_.invalidateBibfileCache();
1621                                 dr.forceBufferUpdate();
1622                         }
1623                 }
1624                 break;
1625         }
1626
1627         case LFUN_BIBTEX_DATABASE_DEL: {
1628                 Cursor tmpcur = cur;
1629                 findInset(tmpcur, BIBTEX_CODE, false);
1630                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1631                                                 BIBTEX_CODE);
1632                 if (inset) {
1633                         if (inset->delDatabase(cmd.argument())) {
1634                                 buffer_.invalidateBibfileCache();
1635                                 dr.forceBufferUpdate();
1636                         }
1637                 }
1638                 break;
1639         }
1640
1641         case LFUN_STATISTICS: {
1642                 DocIterator from, to;
1643                 if (cur.selection()) {
1644                         from = cur.selectionBegin();
1645                         to = cur.selectionEnd();
1646                 } else {
1647                         from = doc_iterator_begin(&buffer_);
1648                         to = doc_iterator_end(&buffer_);
1649                 }
1650                 buffer_.updateStatistics(from, to);
1651                 int const words = buffer_.wordCount();
1652                 int const chars = buffer_.charCount(false);
1653                 int const chars_blanks = buffer_.charCount(true);
1654                 docstring message;
1655                 if (cur.selection())
1656                         message = _("Statistics for the selection:");
1657                 else
1658                         message = _("Statistics for the document:");
1659                 message += "\n\n";
1660                 if (words != 1)
1661                         message += bformat(_("%1$d words"), words);
1662                 else
1663                         message += _("One word");
1664                 message += "\n";
1665                 if (chars_blanks != 1)
1666                         message += bformat(_("%1$d characters (including blanks)"),
1667                                           chars_blanks);
1668                 else
1669                         message += _("One character (including blanks)");
1670                 message += "\n";
1671                 if (chars != 1)
1672                         message += bformat(_("%1$d characters (excluding blanks)"),
1673                                           chars);
1674                 else
1675                         message += _("One character (excluding blanks)");
1676
1677                 Alert::information(_("Statistics"), message);
1678         }
1679                 break;
1680
1681         case LFUN_SCREEN_UP:
1682         case LFUN_SCREEN_DOWN: {
1683                 Point p = getPos(cur);
1684                 // This code has been commented out to enable to scroll down a
1685                 // document, even if there are large insets in it (see bug #5465).
1686                 /*if (p.y_ < 0 || p.y_ > height_) {
1687                         // The cursor is off-screen so recenter before proceeding.
1688                         showCursor();
1689                         p = getPos(cur);
1690                 }*/
1691                 int const scrolled = scroll(act == LFUN_SCREEN_UP
1692                         ? -height_ : height_);
1693                 if (act == LFUN_SCREEN_UP && scrolled > -height_)
1694                         p = Point(0, 0);
1695                 if (act == LFUN_SCREEN_DOWN && scrolled < height_)
1696                         p = Point(width_, height_);
1697                 bool const in_texted = cur.inTexted();
1698                 cur.setCursor(doc_iterator_begin(cur.buffer()));
1699                 cur.selHandle(false);
1700                 buffer_.changed(true);
1701                 updateHoveredInset();
1702
1703                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
1704                         true, act == LFUN_SCREEN_UP);
1705                 //FIXME: what to do with cur.x_target()?
1706                 bool update = in_texted && cur.bv().checkDepm(cur, old);
1707                 cur.finishUndo();
1708
1709                 if (update || cur.mark())
1710                         dr.screenUpdate(Update::Force | Update::FitCursor);
1711                 if (update)
1712                         dr.forceBufferUpdate();
1713                 break;
1714         }
1715
1716         case LFUN_SCROLL: {
1717                 string const scroll_type = cmd.getArg(0);
1718                 int scroll_step = 0;
1719                 if (scroll_type == "line")
1720                         scroll_step = d->scrollbarParameters_.single_step;
1721                 else if (scroll_type == "page")
1722                         scroll_step = d->scrollbarParameters_.page_step;
1723                 else
1724                         return;
1725                 string const scroll_quantity = cmd.getArg(1);
1726                 if (scroll_quantity == "up")
1727                         scrollUp(scroll_step);
1728                 else if (scroll_quantity == "down")
1729                         scrollDown(scroll_step);
1730                 else {
1731                         int const scroll_value = convert<int>(scroll_quantity);
1732                         if (scroll_value)
1733                                 scroll(scroll_step * scroll_value);
1734                 }
1735                 buffer_.changed(true);
1736                 updateHoveredInset();
1737                 dr.forceBufferUpdate();
1738                 break;
1739         }
1740
1741         case LFUN_SCREEN_UP_SELECT: {
1742                 // FIXME: why is the algorithm different from LFUN_SCREEN_UP?
1743                 cur.selHandle(true);
1744                 if (isTopScreen()) {
1745                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1746                         cur.finishUndo();
1747                         break;
1748                 }
1749                 int y = getPos(cur).y_;
1750                 int const ymin = y - height_ + defaultRowHeight();
1751                 while (y > ymin && cur.up())
1752                         y = getPos(cur).y_;
1753
1754                 cur.finishUndo();
1755                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1756                 break;
1757         }
1758
1759         case LFUN_SCREEN_DOWN_SELECT: {
1760                 // FIXME: why is the algorithm different from LFUN_SCREEN_DOWN?
1761                 cur.selHandle(true);
1762                 if (isBottomScreen()) {
1763                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1764                         cur.finishUndo();
1765                         break;
1766                 }
1767                 int y = getPos(cur).y_;
1768                 int const ymax = y + height_ - defaultRowHeight();
1769                 while (y < ymax && cur.down())
1770                         y = getPos(cur).y_;
1771
1772                 cur.finishUndo();
1773                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1774                 break;
1775         }
1776
1777
1778         case LFUN_INSET_SELECT_ALL:
1779                 if (cur.depth() > 1
1780                     && cur.selBegin().at_begin()
1781                     && cur.selEnd().at_end()) {
1782                         // All the contents of the inset if selected.
1783                         // Select the inset from outside.
1784                         cur.pop();
1785                         cur.resetAnchor();
1786                         cur.setSelection(true);
1787                         cur.posForward();
1788                 } else if (cur.selBegin().idx() != cur.selEnd().idx()
1789                            || (cur.depth() > 1
1790                                    && cur.selBegin().at_cell_begin()
1791                                && cur.selEnd().at_cell_end())) {
1792                         // At least one complete cell is selected.
1793                         // Select all cells
1794                         cur.idx() = 0;
1795                         cur.pos() = 0;
1796                         cur.resetAnchor();
1797                         cur.setSelection(true);
1798                         cur.idx() = cur.lastidx();
1799                         cur.pos() = cur.lastpos();
1800                 } else {
1801                         // select current cell
1802                         cur.pit() = 0;
1803                         cur.pos() = 0;
1804                         cur.resetAnchor();
1805                         cur.setSelection(true);
1806                         cur.pit() = cur.lastpit();
1807                         cur.pos() = cur.lastpos();
1808                 }
1809                 cur.setCurrentFont();
1810                 dr.screenUpdate(Update::Force);
1811                 break;
1812
1813
1814         // This would be in Buffer class if only Cursor did not
1815         // require a bufferview
1816         case LFUN_INSET_FORALL: {
1817                 docstring const name = from_utf8(cmd.getArg(0));
1818                 string const commandstr = cmd.getLongArg(1);
1819                 FuncRequest const fr = lyxaction.lookupFunc(commandstr);
1820
1821                 // an arbitrary number to limit number of iterations
1822                 const int max_iter = 100000;
1823                 int iterations = 0;
1824                 Cursor & cur = d->cursor_;
1825                 Cursor const savecur = cur;
1826                 cur.reset();
1827                 if (!cur.nextInset())
1828                         cur.forwardInset();
1829                 cur.beginUndoGroup();
1830                 while(cur && iterations < max_iter) {
1831                         Inset * const ins = cur.nextInset();
1832                         if (!ins)
1833                                 break;
1834                         docstring insname = ins->layoutName();
1835                         while (!insname.empty()) {
1836                                 if (insname == name || name == from_utf8("*")) {
1837                                         cur.recordUndo();
1838                                         lyx::dispatch(fr, dr);
1839                                         ++iterations;
1840                                         break;
1841                                 }
1842                                 size_t const i = insname.rfind(':');
1843                                 if (i == string::npos)
1844                                         break;
1845                                 insname = insname.substr(0, i);
1846                         }
1847                         // if we did not delete the inset, skip it
1848                         if (!cur.nextInset() || cur.nextInset() == ins)
1849                                 cur.forwardInset();
1850                 }
1851                 cur = savecur;
1852                 cur.fixIfBroken();
1853                 /** This is a dummy undo record only to remember the cursor
1854                  * that has just been set; this will be used on a redo action
1855                  * (see ticket #10097)
1856
1857                  * FIXME: a better fix would be to have a way to set the
1858                  * cursor value directly, but I am not sure it is worth it.
1859                  */
1860                 cur.recordUndo();
1861                 cur.endUndoGroup();
1862                 dr.screenUpdate(Update::Force);
1863                 dr.forceBufferUpdate();
1864
1865                 if (iterations >= max_iter) {
1866                         dr.setError(true);
1867                         dr.setMessage(bformat(_("`inset-forall' interrupted because number of actions is larger than %1$d"), max_iter));
1868                 } else
1869                         dr.setMessage(bformat(_("Applied \"%1$s\" to %2$d insets"), from_utf8(commandstr), iterations));
1870                 break;
1871         }
1872
1873
1874         case LFUN_BRANCH_ADD_INSERT: {
1875                 docstring branch_name = from_utf8(cmd.getArg(0));
1876                 if (branch_name.empty())
1877                         if (!Alert::askForText(branch_name, _("Branch name")) ||
1878                                                 branch_name.empty())
1879                                 break;
1880
1881                 DispatchResult drtmp;
1882                 buffer_.dispatch(FuncRequest(LFUN_BRANCH_ADD, branch_name), drtmp);
1883                 if (drtmp.error()) {
1884                         Alert::warning(_("Branch already exists"), drtmp.message());
1885                         break;
1886                 }
1887                 BranchList & branch_list = buffer_.params().branchlist();
1888                 vector<docstring> const branches =
1889                         getVectorFromString(branch_name, branch_list.separator());
1890                 for (vector<docstring>::const_iterator it = branches.begin();
1891                      it != branches.end(); ++it) {
1892                         branch_name = *it;
1893                         lyx::dispatch(FuncRequest(LFUN_BRANCH_INSERT, branch_name));
1894                 }
1895                 break;
1896         }
1897
1898         case LFUN_KEYMAP_OFF:
1899                 getIntl().keyMapOn(false);
1900                 break;
1901
1902         case LFUN_KEYMAP_PRIMARY:
1903                 getIntl().keyMapPrim();
1904                 break;
1905
1906         case LFUN_KEYMAP_SECONDARY:
1907                 getIntl().keyMapSec();
1908                 break;
1909
1910         case LFUN_KEYMAP_TOGGLE:
1911                 getIntl().toggleKeyMap();
1912                 break;
1913
1914         case LFUN_DIALOG_SHOW_NEW_INSET: {
1915                 string const name = cmd.getArg(0);
1916                 string data = trim(to_utf8(cmd.argument()).substr(name.size()));
1917                 if (decodeInsetParam(name, data, buffer_))
1918                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, name + " " + data));
1919                 else
1920                         lyxerr << "Inset type '" << name <<
1921                         "' not recognized in LFUN_DIALOG_SHOW_NEW_INSET" <<  endl;
1922                 break;
1923         }
1924
1925         case LFUN_CITATION_INSERT: {
1926                 if (argument.empty()) {
1927                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW_NEW_INSET, "citation"));
1928                         break;
1929                 }
1930                 // we can have one optional argument, delimited by '|'
1931                 // citation-insert <key>|<text_before>
1932                 // this should be enhanced to also support text_after
1933                 // and citation style
1934                 string arg = argument;
1935                 string opt1;
1936                 if (contains(argument, "|")) {
1937                         arg = token(argument, '|', 0);
1938                         opt1 = token(argument, '|', 1);
1939                 }
1940
1941                 // if our cursor is directly in front of or behind a citation inset,
1942                 // we will instead add the new key to it.
1943                 Inset * inset = cur.nextInset();
1944                 if (!inset || inset->lyxCode() != CITE_CODE)
1945                         inset = cur.prevInset();
1946                 if (inset && inset->lyxCode() == CITE_CODE) {
1947                         InsetCitation * icite = static_cast<InsetCitation *>(inset);
1948                         if (icite->addKey(arg)) {
1949                                 dr.forceBufferUpdate();
1950                                 dr.screenUpdate(Update::FitCursor | Update::SinglePar);
1951                                 if (!opt1.empty())
1952                                         LYXERR0("Discarding optional argument to citation-insert.");
1953                         }
1954                         dispatched = true;
1955                         break;
1956                 }
1957                 InsetCommandParams icp(CITE_CODE);
1958                 icp["key"] = from_utf8(arg);
1959                 if (!opt1.empty())
1960                         icp["before"] = from_utf8(opt1);
1961                 string icstr = InsetCommand::params2string(icp);
1962                 FuncRequest fr(LFUN_INSET_INSERT, icstr);
1963                 lyx::dispatch(fr);
1964                 break;
1965         }
1966
1967         case LFUN_INSET_APPLY: {
1968                 string const name = cmd.getArg(0);
1969                 Inset * inset = editedInset(name);
1970                 if (!inset) {
1971                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1972                         lyx::dispatch(fr);
1973                         break;
1974                 }
1975                 // put cursor in front of inset.
1976                 if (!setCursorFromInset(inset)) {
1977                         LASSERT(false, break);
1978                 }
1979                 cur.recordUndo();
1980                 FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1981                 inset->dispatch(cur, fr);
1982                 dr.screenUpdate(cur.result().screenUpdate());
1983                 if (cur.result().needBufferUpdate())
1984                         dr.forceBufferUpdate();
1985                 break;
1986         }
1987
1988         // FIXME:
1989         // The change of language of buffer belongs to the Buffer class.
1990         // We have to do it here because we need a cursor for Undo.
1991         // When Undo::recordUndoBufferParams() is implemented someday
1992         // LFUN_BUFFER_LANGUAGE should be handled by the Buffer class.
1993         case LFUN_BUFFER_LANGUAGE: {
1994                 Language const * oldL = buffer_.params().language;
1995                 Language const * newL = languages.getLanguage(argument);
1996                 if (!newL || oldL == newL)
1997                         break;
1998                 if (oldL->rightToLeft() == newL->rightToLeft()) {
1999                         cur.recordUndoFullBuffer();
2000                         buffer_.changeLanguage(oldL, newL);
2001                         cur.setCurrentFont();
2002                         dr.forceBufferUpdate();
2003                 }
2004                 break;
2005         }
2006
2007         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
2008         case LFUN_FILE_INSERT_PLAINTEXT: {
2009                 bool const as_paragraph = (act == LFUN_FILE_INSERT_PLAINTEXT_PARA);
2010                 string const fname = to_utf8(cmd.argument());
2011                 if (!FileName::isAbsolute(fname))
2012                         dr.setMessage(_("Absolute filename expected."));
2013                 else
2014                         insertPlaintextFile(FileName(fname), as_paragraph);
2015                 break;
2016         }
2017
2018         default:
2019                 // OK, so try the Buffer itself...
2020                 buffer_.dispatch(cmd, dr);
2021                 dispatched = dr.dispatched();
2022                 break;
2023         }
2024
2025         buffer_.undo().endUndoGroup();
2026         dr.dispatched(dispatched);
2027
2028         // NOTE: The code below is copied from Cursor::dispatch. If you
2029         // need to modify this, please update the other one too.
2030
2031         // notify insets we just entered/left
2032         if (cursor() != old) {
2033                 old.beginUndoGroup();
2034                 old.fixIfBroken();
2035                 bool badcursor = notifyCursorLeavesOrEnters(old, cursor());
2036                 if (badcursor) {
2037                         cursor().fixIfBroken();
2038                         resetInlineCompletionPos();
2039                 }
2040                 old.endUndoGroup();
2041         }
2042 }
2043
2044
2045 docstring const BufferView::requestSelection()
2046 {
2047         Cursor & cur = d->cursor_;
2048
2049         LYXERR(Debug::SELECTION, "requestSelection: cur.selection: " << cur.selection());
2050         if (!cur.selection()) {
2051                 d->xsel_cache_.set = false;
2052                 return docstring();
2053         }
2054
2055         LYXERR(Debug::SELECTION, "requestSelection: xsel_cache.set: " << d->xsel_cache_.set);
2056         if (!d->xsel_cache_.set ||
2057             cur.top() != d->xsel_cache_.cursor ||
2058             cur.realAnchor().top() != d->xsel_cache_.anchor)
2059         {
2060                 d->xsel_cache_.cursor = cur.top();
2061                 d->xsel_cache_.anchor = cur.realAnchor().top();
2062                 d->xsel_cache_.set = cur.selection();
2063                 return cur.selectionAsString(false);
2064         }
2065         return docstring();
2066 }
2067
2068
2069 void BufferView::clearSelection()
2070 {
2071         d->cursor_.clearSelection();
2072         // Clear the selection buffer. Otherwise a subsequent
2073         // middle-mouse-button paste would use the selection buffer,
2074         // not the more current external selection.
2075         cap::clearSelection();
2076         d->xsel_cache_.set = false;
2077         // The buffer did not really change, but this causes the
2078         // redraw we need because we cleared the selection above.
2079         buffer_.changed(false);
2080 }
2081
2082
2083 void BufferView::resize(int width, int height)
2084 {
2085         // Update from work area
2086         width_ = width;
2087         height_ = height;
2088
2089         // Clear the paragraph height cache.
2090         d->par_height_.clear();
2091         // Redo the metrics.
2092         updateMetrics();
2093 }
2094
2095
2096 Inset const * BufferView::getCoveringInset(Text const & text,
2097                 int x, int y) const
2098 {
2099         TextMetrics & tm = d->text_metrics_[&text];
2100         Inset * inset = tm.checkInsetHit(x, y);
2101         if (!inset)
2102                 return 0;
2103
2104         if (!inset->descendable(*this))
2105                 // No need to go further down if the inset is not
2106                 // descendable.
2107                 return inset;
2108
2109         size_t cell_number = inset->nargs();
2110         // Check all the inner cell.
2111         for (size_t i = 0; i != cell_number; ++i) {
2112                 Text const * inner_text = inset->getText(i);
2113                 if (inner_text) {
2114                         // Try deeper.
2115                         Inset const * inset_deeper =
2116                                 getCoveringInset(*inner_text, x, y);
2117                         if (inset_deeper)
2118                                 return inset_deeper;
2119                 }
2120         }
2121
2122         return inset;
2123 }
2124
2125
2126 void BufferView::updateHoveredInset() const
2127 {
2128         // Get inset under mouse, if there is one.
2129         int const x = d->mouse_position_cache_.x_;
2130         int const y = d->mouse_position_cache_.y_;
2131         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
2132
2133         d->clickable_inset_ = covering_inset && covering_inset->clickable(*this, x, y);
2134
2135         if (covering_inset == d->last_inset_)
2136                 // Same inset, no need to do anything...
2137                 return;
2138
2139         bool need_redraw = false;
2140         if (d->last_inset_) {
2141                 // Remove the hint on the last hovered inset (if any).
2142                 need_redraw |= d->last_inset_->setMouseHover(this, false);
2143                 d->last_inset_ = 0;
2144         }
2145
2146         if (covering_inset && covering_inset->setMouseHover(this, true)) {
2147                 need_redraw = true;
2148                 // Only the insets that accept the hover state, do
2149                 // clear the last_inset_, so only set the last_inset_
2150                 // member if the hovered setting is accepted.
2151                 d->last_inset_ = covering_inset;
2152         }
2153
2154         if (need_redraw) {
2155                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
2156                                 << d->mouse_position_cache_.x_ << ", "
2157                                 << d->mouse_position_cache_.y_ << ")");
2158
2159                 d->update_strategy_ = DecorationUpdate;
2160
2161                 // This event (moving without mouse click) is not passed further.
2162                 // This should be changed if it is further utilized.
2163                 buffer_.changed(false);
2164         }
2165 }
2166
2167
2168 void BufferView::clearLastInset(Inset * inset) const
2169 {
2170         if (d->last_inset_ != inset) {
2171                 LYXERR0("Wrong last_inset!");
2172                 LATTEST(false);
2173         }
2174         d->last_inset_ = 0;
2175 }
2176
2177
2178 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
2179 {
2180         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
2181
2182         // This is only called for mouse related events including
2183         // LFUN_FILE_OPEN generated by drag-and-drop.
2184         FuncRequest cmd = cmd0;
2185
2186         Cursor old = cursor();
2187         Cursor cur(*this);
2188         cur.push(buffer_.inset());
2189         cur.setSelection(d->cursor_.selection());
2190
2191         // Either the inset under the cursor or the
2192         // surrounding Text will handle this event.
2193
2194         // make sure we stay within the screen...
2195         cmd.set_y(min(max(cmd.y(), -1), height_));
2196
2197         d->mouse_position_cache_.x_ = cmd.x();
2198         d->mouse_position_cache_.y_ = cmd.y();
2199
2200         if (cmd.action() == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
2201                 updateHoveredInset();
2202                 return;
2203         }
2204
2205         // Build temporary cursor.
2206         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x(), cmd.y());
2207         if (inset) {
2208                 // If inset is not editable, cur.pos() might point behind the
2209                 // inset (depending on cmd.x(), cmd.y()). This is needed for
2210                 // editing to fix bug 9628, but e.g. the context menu needs a
2211                 // cursor in front of the inset.
2212                 if ((inset->hasSettings() || !inset->contextMenuName().empty()
2213                      || inset->lyxCode() == SEPARATOR_CODE) &&
2214                     cur.nextInset() != inset && cur.prevInset() == inset)
2215                         cur.posBackward();
2216         } else if (cur.inTexted() && cur.pos()
2217                         && cur.paragraph().isEnvSeparator(cur.pos() - 1)) {
2218                 // Always place cursor in front of a separator inset.
2219                 cur.posBackward();
2220         }
2221
2222         // Put anchor at the same position.
2223         cur.resetAnchor();
2224
2225         cur.beginUndoGroup();
2226
2227         // Try to dispatch to an non-editable inset near this position
2228         // via the temp cursor. If the inset wishes to change the real
2229         // cursor it has to do so explicitly by using
2230         //  cur.bv().cursor() = cur;  (or similar)
2231         if (inset)
2232                 inset->dispatch(cur, cmd);
2233
2234         // Now dispatch to the temporary cursor. If the real cursor should
2235         // be modified, the inset's dispatch has to do so explicitly.
2236         if (!inset || !cur.result().dispatched())
2237                 cur.dispatch(cmd);
2238
2239         // Notify left insets
2240         if (cur != old) {
2241                 bool badcursor = old.fixIfBroken() | cur.fixIfBroken();
2242                 badcursor |= notifyCursorLeavesOrEnters(old, cur);
2243                 if (badcursor)
2244                         cursor().fixIfBroken();
2245         }
2246
2247         cur.endUndoGroup();
2248
2249         // Do we have a selection?
2250         theSelection().haveSelection(cursor().selection());
2251
2252         if (cur.needBufferUpdate()) {
2253                 cur.clearBufferUpdate();
2254                 buffer().updateBuffer();
2255         }
2256
2257         // If the command has been dispatched,
2258         if (cur.result().dispatched() || cur.result().screenUpdate())
2259                 processUpdateFlags(cur.result().screenUpdate());
2260 }
2261
2262
2263 int BufferView::minVisiblePart()
2264 {
2265         return 2 * defaultRowHeight();
2266 }
2267
2268
2269 int BufferView::scroll(int y)
2270 {
2271         if (y > 0)
2272                 return scrollDown(y);
2273         if (y < 0)
2274                 return scrollUp(-y);
2275         return 0;
2276 }
2277
2278
2279 int BufferView::scrollDown(int offset)
2280 {
2281         Text * text = &buffer_.text();
2282         TextMetrics & tm = d->text_metrics_[text];
2283         int const ymax = height_ + offset;
2284         while (true) {
2285                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
2286                 int bottom_pos = last.second->position() + last.second->descent();
2287                 if (lyxrc.scroll_below_document)
2288                         bottom_pos += height_ - minVisiblePart();
2289                 if (last.first + 1 == int(text->paragraphs().size())) {
2290                         if (bottom_pos <= height_)
2291                                 return 0;
2292                         offset = min(offset, bottom_pos - height_);
2293                         break;
2294                 }
2295                 if (bottom_pos > ymax)
2296                         break;
2297                 tm.newParMetricsDown();
2298         }
2299         d->anchor_ypos_ -= offset;
2300         return -offset;
2301 }
2302
2303
2304 int BufferView::scrollUp(int offset)
2305 {
2306         Text * text = &buffer_.text();
2307         TextMetrics & tm = d->text_metrics_[text];
2308         int ymin = - offset;
2309         while (true) {
2310                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
2311                 int top_pos = first.second->position() - first.second->ascent();
2312                 if (first.first == 0) {
2313                         if (top_pos >= 0)
2314                                 return 0;
2315                         offset = min(offset, - top_pos);
2316                         break;
2317                 }
2318                 if (top_pos < ymin)
2319                         break;
2320                 tm.newParMetricsUp();
2321         }
2322         d->anchor_ypos_ += offset;
2323         return offset;
2324 }
2325
2326
2327 void BufferView::setCursorFromRow(int row)
2328 {
2329         setCursorFromRow(row, buffer_.texrow());
2330 }
2331
2332
2333 void BufferView::setCursorFromRow(int row, TexRow const & texrow)
2334 {
2335         int tmpid;
2336         int tmppos;
2337         pit_type newpit = 0;
2338         pos_type newpos = 0;
2339
2340         texrow.getIdFromRow(row, tmpid, tmppos);
2341
2342         bool posvalid = (tmpid != -1);
2343         if (posvalid) {
2344                 // we need to make sure that the row and position
2345                 // we got back are valid, because the buffer may well
2346                 // have changed since we last generated the LaTeX.
2347                 DocIterator dit = buffer_.getParFromID(tmpid);
2348                 if (dit == doc_iterator_end(&buffer_))
2349                         posvalid = false;
2350                 else if (dit.depth() > 1) {
2351                         // We are in an inset.
2352                         pos_type lastpos = dit.lastpos();
2353                         dit.pos() = tmppos > lastpos ? lastpos : tmppos;
2354                         setCursor(dit);
2355                         recenter();
2356                         return;
2357                 } else {
2358                         newpit = dit.pit();
2359                         // now have to check pos.
2360                         newpos = tmppos;
2361                         Paragraph const & par = buffer_.text().getPar(newpit);
2362                         if (newpos > par.size()) {
2363                                 LYXERR0("Requested position no longer valid.");
2364                                 newpos = par.size() - 1;
2365                         }
2366                 }
2367         }
2368         if (!posvalid) {
2369                 frontend::Alert::error(_("Inverse Search Failed"),
2370                         _("Invalid position requested by inverse search.\n"
2371                     "You need to update the viewed document."));
2372                 return;
2373         }
2374         d->cursor_.reset();
2375         buffer_.text().setCursor(d->cursor_, newpit, newpos);
2376         d->cursor_.setSelection(false);
2377         d->cursor_.resetAnchor();
2378         recenter();
2379 }
2380
2381
2382 bool BufferView::setCursorFromInset(Inset const * inset)
2383 {
2384         // are we already there?
2385         if (cursor().nextInset() == inset)
2386                 return true;
2387
2388         // Inset is not at cursor position. Find it in the document.
2389         Cursor cur(*this);
2390         cur.reset();
2391         while (cur && cur.nextInset() != inset)
2392                 cur.forwardInset();
2393
2394         if (cur) {
2395                 setCursor(cur);
2396                 return true;
2397         }
2398         return false;
2399 }
2400
2401
2402 void BufferView::gotoLabel(docstring const & label)
2403 {
2404         ListOfBuffers bufs = buffer().allRelatives();
2405         ListOfBuffers::iterator it = bufs.begin();
2406         for (; it != bufs.end(); ++it) {
2407                 Buffer const * buf = *it;
2408
2409                 // find label
2410                 shared_ptr<Toc> toc = buf->tocBackend().toc("label");
2411                 TocIterator toc_it = toc->begin();
2412                 TocIterator end = toc->end();
2413                 for (; toc_it != end; ++toc_it) {
2414                         if (label == toc_it->str()) {
2415                                 lyx::dispatch(toc_it->action());
2416                                 return;
2417                         }
2418                 }
2419         }
2420 }
2421
2422
2423 TextMetrics const & BufferView::textMetrics(Text const * t) const
2424 {
2425         return const_cast<BufferView *>(this)->textMetrics(t);
2426 }
2427
2428
2429 TextMetrics & BufferView::textMetrics(Text const * t)
2430 {
2431         LBUFERR(t);
2432         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
2433         if (tmc_it == d->text_metrics_.end()) {
2434                 tmc_it = d->text_metrics_.insert(
2435                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
2436         }
2437         return tmc_it->second;
2438 }
2439
2440
2441 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
2442                 pit_type pit) const
2443 {
2444         return textMetrics(t).parMetrics(pit);
2445 }
2446
2447
2448 int BufferView::workHeight() const
2449 {
2450         return height_;
2451 }
2452
2453
2454 void BufferView::setCursor(DocIterator const & dit)
2455 {
2456         d->cursor_.reset();
2457         size_t const n = dit.depth();
2458         for (size_t i = 0; i < n; ++i)
2459                 dit[i].inset().edit(d->cursor_, true);
2460
2461         d->cursor_.setCursor(dit);
2462         d->cursor_.setSelection(false);
2463         d->cursor_.setCurrentFont();
2464         // FIXME
2465         // It seems on general grounds as if this is probably needed, but
2466         // it is not yet clear.
2467         // See bug #7394 and r38388.
2468         // d->cursor.resetAnchor();
2469 }
2470
2471
2472 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
2473 {
2474         // Would be wrong to delete anything if we have a selection.
2475         if (cur.selection())
2476                 return false;
2477
2478         bool need_anchor_change = false;
2479         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
2480                 need_anchor_change);
2481
2482         if (need_anchor_change)
2483                 cur.resetAnchor();
2484
2485         if (!changed)
2486                 return false;
2487
2488         d->cursor_ = cur;
2489
2490         // we would rather not do this here, but it needs to be done before
2491         // the changed() signal is sent.
2492         buffer_.updateBuffer();
2493
2494         buffer_.changed(true);
2495         return true;
2496 }
2497
2498
2499 bool BufferView::mouseSetCursor(Cursor & cur, bool select)
2500 {
2501         LASSERT(&cur.bv() == this, return false);
2502
2503         if (!select)
2504                 // this event will clear selection so we save selection for
2505                 // persistent selection
2506                 cap::saveSelection(cursor());
2507
2508         d->cursor_.macroModeClose();
2509         // If a macro has been finalized, the cursor might have been broken
2510         cur.fixIfBroken();
2511
2512         // Has the cursor just left the inset?
2513         bool const leftinset = (&d->cursor_.inset() != &cur.inset());
2514         if (leftinset)
2515                 d->cursor_.fixIfBroken();
2516
2517         // FIXME: shift-mouse selection doesn't work well across insets.
2518         bool const do_selection =
2519                         select && &d->cursor_.normalAnchor().inset() == &cur.inset();
2520
2521         // do the dEPM magic if needed
2522         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
2523         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
2524         // the leftinset bool would not be necessary (badcursor instead).
2525         bool update = leftinset;
2526         if (!do_selection && d->cursor_.inTexted())
2527                 update |= checkDepm(cur, d->cursor_);
2528
2529         if (!do_selection)
2530                 d->cursor_.resetAnchor();
2531         d->cursor_.setCursor(cur);
2532         d->cursor_.boundary(cur.boundary());
2533         if (do_selection)
2534                 d->cursor_.setSelection();
2535         else
2536                 d->cursor_.clearSelection();
2537
2538         d->cursor_.finishUndo();
2539         d->cursor_.setCurrentFont();
2540         if (update)
2541                 cur.forceBufferUpdate();
2542         return update;
2543 }
2544
2545
2546 void BufferView::putSelectionAt(DocIterator const & cur,
2547                                 int length, bool backwards)
2548 {
2549         d->cursor_.clearSelection();
2550
2551         setCursor(cur);
2552
2553         if (length) {
2554                 if (backwards) {
2555                         d->cursor_.pos() += length;
2556                         d->cursor_.setSelection(d->cursor_, -length);
2557                 } else
2558                         d->cursor_.setSelection(d->cursor_, length);
2559         }
2560 }
2561
2562
2563 bool BufferView::selectIfEmpty(DocIterator & cur)
2564 {
2565         if ((cur.inTexted() && !cur.paragraph().empty())
2566             || (cur.inMathed() && !cur.cell().empty()))
2567                 return false;
2568
2569         pit_type const beg_pit = cur.pit();
2570         if (beg_pit > 0) {
2571                 // The paragraph associated to this item isn't
2572                 // the first one, so it can be selected
2573                 cur.backwardPos();
2574         } else {
2575                 // We have to resort to select the space between the
2576                 // end of this item and the begin of the next one
2577                 cur.forwardPos();
2578         }
2579         if (cur.empty()) {
2580                 // If it is the only item in the document,
2581                 // nothing can be selected
2582                 return false;
2583         }
2584         pit_type const end_pit = cur.pit();
2585         pos_type const end_pos = cur.pos();
2586         d->cursor_.clearSelection();
2587         d->cursor_.reset();
2588         d->cursor_.setCursor(cur);
2589         d->cursor_.pit() = beg_pit;
2590         d->cursor_.pos() = 0;
2591         d->cursor_.setSelection(false);
2592         d->cursor_.resetAnchor();
2593         d->cursor_.pit() = end_pit;
2594         d->cursor_.pos() = end_pos;
2595         d->cursor_.setSelection();
2596         return true;
2597 }
2598
2599
2600 Cursor & BufferView::cursor()
2601 {
2602         return d->cursor_;
2603 }
2604
2605
2606 Cursor const & BufferView::cursor() const
2607 {
2608         return d->cursor_;
2609 }
2610
2611
2612 pit_type BufferView::anchor_ref() const
2613 {
2614         return d->anchor_pit_;
2615 }
2616
2617
2618 bool BufferView::singleParUpdate()
2619 {
2620         Text & buftext = buffer_.text();
2621         pit_type const bottom_pit = d->cursor_.bottom().pit();
2622         TextMetrics & tm = textMetrics(&buftext);
2623         int old_height = tm.parMetrics(bottom_pit).height();
2624
2625         // make sure inline completion pointer is ok
2626         if (d->inlineCompletionPos_.fixIfBroken())
2627                 d->inlineCompletionPos_ = DocIterator();
2628
2629         // In Single Paragraph mode, rebreak only
2630         // the (main text, not inset!) paragraph containing the cursor.
2631         // (if this paragraph contains insets etc., rebreaking will
2632         // recursively descend)
2633         tm.redoParagraph(bottom_pit);
2634         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
2635         if (pm.height() != old_height)
2636                 // Paragraph height has changed so we cannot proceed to
2637                 // the singlePar optimisation.
2638                 return false;
2639
2640         d->update_strategy_ = SingleParUpdate;
2641
2642         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
2643                 << " y2: " << pm.position() + pm.descent()
2644                 << " pit: " << bottom_pit
2645                 << " singlepar: 1");
2646         return true;
2647 }
2648
2649
2650 void BufferView::updateMetrics()
2651 {
2652         if (height_ == 0 || width_ == 0)
2653                 return;
2654
2655         Text & buftext = buffer_.text();
2656         pit_type const npit = int(buftext.paragraphs().size());
2657
2658         // Clear out the position cache in case of full screen redraw,
2659         d->coord_cache_.clear();
2660
2661         // Clear out paragraph metrics to avoid having invalid metrics
2662         // in the cache from paragraphs not relayouted below
2663         // The complete text metrics will be redone.
2664         d->text_metrics_.clear();
2665
2666         TextMetrics & tm = textMetrics(&buftext);
2667
2668         // make sure inline completion pointer is ok
2669         if (d->inlineCompletionPos_.fixIfBroken())
2670                 d->inlineCompletionPos_ = DocIterator();
2671
2672         if (d->anchor_pit_ >= npit)
2673                 // The anchor pit must have been deleted...
2674                 d->anchor_pit_ = npit - 1;
2675
2676         // Rebreak anchor paragraph.
2677         tm.redoParagraph(d->anchor_pit_);
2678         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
2679
2680         // position anchor
2681         if (d->anchor_pit_ == 0) {
2682                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
2683
2684                 // Complete buffer visible? Then it's easy.
2685                 if (scrollRange == 0)
2686                         d->anchor_ypos_ = anchor_pm.ascent();
2687
2688                 // FIXME: Some clever handling needed to show
2689                 // the _first_ paragraph up to the top if the cursor is
2690                 // in the first line.
2691         }
2692         anchor_pm.setPosition(d->anchor_ypos_);
2693
2694         LYXERR(Debug::PAINTING, "metrics: "
2695                 << " anchor pit = " << d->anchor_pit_
2696                 << " anchor ypos = " << d->anchor_ypos_);
2697
2698         // Redo paragraphs above anchor if necessary.
2699         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
2700         // We are now just above the anchor paragraph.
2701         pit_type pit1 = d->anchor_pit_ - 1;
2702         for (; pit1 >= 0 && y1 >= 0; --pit1) {
2703                 tm.redoParagraph(pit1);
2704                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
2705                 y1 -= pm.descent();
2706                 // Save the paragraph position in the cache.
2707                 pm.setPosition(y1);
2708                 y1 -= pm.ascent();
2709         }
2710
2711         // Redo paragraphs below the anchor if necessary.
2712         int y2 = d->anchor_ypos_ + anchor_pm.descent();
2713         // We are now just below the anchor paragraph.
2714         pit_type pit2 = d->anchor_pit_ + 1;
2715         for (; pit2 < npit && y2 <= height_; ++pit2) {
2716                 tm.redoParagraph(pit2);
2717                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
2718                 y2 += pm.ascent();
2719                 // Save the paragraph position in the cache.
2720                 pm.setPosition(y2);
2721                 y2 += pm.descent();
2722         }
2723
2724         LYXERR(Debug::PAINTING, "Metrics: "
2725                 << " anchor pit = " << d->anchor_pit_
2726                 << " anchor ypos = " << d->anchor_ypos_
2727                 << " y1 = " << y1
2728                 << " y2 = " << y2
2729                 << " pit1 = " << pit1
2730                 << " pit2 = " << pit2);
2731
2732         d->update_strategy_ = FullScreenUpdate;
2733
2734         if (lyxerr.debugging(Debug::WORKAREA)) {
2735                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
2736                 d->coord_cache_.dump();
2737         }
2738 }
2739
2740
2741 void BufferView::insertLyXFile(FileName const & fname)
2742 {
2743         LASSERT(d->cursor_.inTexted(), return);
2744
2745         // Get absolute path of file and add ".lyx"
2746         // to the filename if necessary
2747         FileName filename = fileSearch(string(), fname.absFileName(), "lyx");
2748
2749         docstring const disp_fn = makeDisplayPath(filename.absFileName());
2750         // emit message signal.
2751         message(bformat(_("Inserting document %1$s..."), disp_fn));
2752
2753         docstring res;
2754         Buffer buf(filename.absFileName(), false);
2755         if (buf.loadLyXFile() == Buffer::ReadSuccess) {
2756                 ErrorList & el = buffer_.errorList("Parse");
2757                 // Copy the inserted document error list into the current buffer one.
2758                 el = buf.errorList("Parse");
2759                 buffer_.undo().recordUndo(d->cursor_);
2760                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
2761                                              buf.params().documentClassPtr(), el);
2762                 res = _("Document %1$s inserted.");
2763         } else {
2764                 res = _("Could not insert document %1$s");
2765         }
2766
2767         buffer_.changed(true);
2768         // emit message signal.
2769         message(bformat(res, disp_fn));
2770 }
2771
2772
2773 Point BufferView::coordOffset(DocIterator const & dit) const
2774 {
2775         int x = 0;
2776         int y = 0;
2777         int lastw = 0;
2778
2779         // Addup contribution of nested insets, from inside to outside,
2780         // keeping the outer paragraph for a special handling below
2781         for (size_t i = dit.depth() - 1; i >= 1; --i) {
2782                 CursorSlice const & sl = dit[i];
2783                 int xx = 0;
2784                 int yy = 0;
2785
2786                 // get relative position inside sl.inset()
2787                 sl.inset().cursorPos(*this, sl, dit.boundary() && (i + 1 == dit.depth()), xx, yy);
2788
2789                 // Make relative position inside of the edited inset relative to sl.inset()
2790                 x += xx;
2791                 y += yy;
2792
2793                 // In case of an RTL inset, the edited inset will be positioned to the left
2794                 // of xx:yy
2795                 if (sl.text()) {
2796                         bool boundary_i = dit.boundary() && i + 1 == dit.depth();
2797                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
2798                         if (rtl)
2799                                 x -= lastw;
2800                 }
2801
2802                 // remember width for the case that sl.inset() is positioned in an RTL inset
2803                 if (i && dit[i - 1].text()) {
2804                         // If this Inset is inside a Text Inset, retrieve the Dimension
2805                         // from the containing text instead of using Inset::dimension() which
2806                         // might not be implemented.
2807                         // FIXME (Abdel 23/09/2007): this is a bit messy because of the
2808                         // elimination of Inset::dim_ cache. This coordOffset() method needs
2809                         // to be rewritten in light of the new design.
2810                         Dimension const & dim = coordCache().getInsets().dim(&sl.inset());
2811                         lastw = dim.wid;
2812                 } else {
2813                         Dimension const dim = sl.inset().dimension(*this);
2814                         lastw = dim.wid;
2815                 }
2816
2817                 //lyxerr << "Cursor::getPos, i: "
2818                 // << i << " x: " << xx << " y: " << y << endl;
2819         }
2820
2821         // Add contribution of initial rows of outermost paragraph
2822         CursorSlice const & sl = dit[0];
2823         TextMetrics const & tm = textMetrics(sl.text());
2824         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
2825
2826         LBUFERR(!pm.rows().empty());
2827         y -= pm.rows()[0].ascent();
2828 #if 1
2829         // FIXME: document this mess
2830         size_t rend;
2831         if (sl.pos() > 0 && dit.depth() == 1) {
2832                 int pos = sl.pos();
2833                 if (pos && dit.boundary())
2834                         --pos;
2835 //              lyxerr << "coordOffset: boundary:" << dit.boundary() << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
2836                 rend = pm.pos2row(pos);
2837         } else
2838                 rend = pm.pos2row(sl.pos());
2839 #else
2840         size_t rend = pm.pos2row(sl.pos());
2841 #endif
2842         for (size_t rit = 0; rit != rend; ++rit)
2843                 y += pm.rows()[rit].height();
2844         y += pm.rows()[rend].ascent();
2845
2846         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2847
2848         // Make relative position from the nested inset now bufferview absolute.
2849         int xx = bottom_tm.cursorX(dit.bottom(), dit.boundary() && dit.depth() == 1);
2850         x += xx;
2851
2852         // In the RTL case place the nested inset at the left of the cursor in
2853         // the outer paragraph
2854         bool boundary_1 = dit.boundary() && 1 == dit.depth();
2855         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2856         if (rtl)
2857                 x -= lastw;
2858
2859         return Point(x, y);
2860 }
2861
2862
2863 Point BufferView::getPos(DocIterator const & dit) const
2864 {
2865         if (!paragraphVisible(dit))
2866                 return Point(-1, -1);
2867
2868         CursorSlice const & bot = dit.bottom();
2869         TextMetrics const & tm = textMetrics(bot.text());
2870
2871         // offset from outer paragraph
2872         Point p = coordOffset(dit);
2873         p.y_ += tm.parMetrics(bot.pit()).position();
2874         return p;
2875 }
2876
2877
2878 bool BufferView::paragraphVisible(DocIterator const & dit) const
2879 {
2880         CursorSlice const & bot = dit.bottom();
2881         TextMetrics const & tm = textMetrics(bot.text());
2882
2883         return tm.contains(bot.pit());
2884 }
2885
2886
2887 void BufferView::cursorPosAndHeight(Point & p, int & h) const
2888 {
2889         Cursor const & cur = cursor();
2890         Font const font = cur.getFont();
2891         frontend::FontMetrics const & fm = theFontMetrics(font);
2892         int const asc = fm.maxAscent();
2893         int const des = fm.maxDescent();
2894         h = asc + des;
2895         p = getPos(cur);
2896         p.y_ -= asc;
2897 }
2898
2899
2900 bool BufferView::cursorInView(Point const & p, int h) const
2901 {
2902         Cursor const & cur = cursor();
2903         // does the cursor touch the screen ?
2904         if (p.y_ + h < 0 || p.y_ >= workHeight() || !paragraphVisible(cur))
2905                 return false;
2906         return true;
2907 }
2908
2909
2910 int BufferView::horizScrollOffset() const
2911 {
2912         return d->horiz_scroll_offset_;
2913 }
2914
2915
2916 CursorSlice const & BufferView::currentRowSlice() const
2917 {
2918         return d->current_row_slice_;
2919 }
2920
2921
2922 CursorSlice const & BufferView::lastRowSlice() const
2923 {
2924         return d->last_row_slice_;
2925 }
2926
2927
2928 void BufferView::setCurrentRowSlice(CursorSlice const & rowSlice)
2929 {
2930         // nothing to do if the cursor was already on this row
2931         if (d->current_row_slice_ == rowSlice) {
2932                 d->last_row_slice_ = CursorSlice();
2933                 return;
2934         }
2935
2936         // if the (previous) current row was scrolled, we have to
2937         // remember it in order to repaint it next time.
2938         if (d->horiz_scroll_offset_ != 0)
2939                 d->last_row_slice_ = d->current_row_slice_;
2940         else
2941                 d->last_row_slice_ = CursorSlice();
2942
2943         // Since we changed row, the scroll offset is not valid anymore
2944         d->horiz_scroll_offset_ = 0;
2945         d->current_row_slice_ = rowSlice;
2946 }
2947
2948
2949 void BufferView::checkCursorScrollOffset(PainterInfo & pi)
2950 {
2951         CursorSlice rowSlice = d->cursor_.bottom();
2952         TextMetrics const & tm = textMetrics(rowSlice.text());
2953
2954         // Stop if metrics have not been computed yet, since it means
2955         // that there is nothing to do.
2956         if (!tm.contains(rowSlice.pit()))
2957                 return;
2958         ParagraphMetrics const & pm = tm.parMetrics(rowSlice.pit());
2959         Row const & row = pm.getRow(rowSlice.pos(),
2960                                     d->cursor_.boundary() && rowSlice == d->cursor_.top());
2961         rowSlice.pos() = row.pos();
2962
2963         // Set the row on which the cursor lives.
2964         setCurrentRowSlice(rowSlice);
2965
2966         // If insets referred to by cursor are not all in the cache, the positions
2967         // need to be recomputed.
2968         if (!d->cursor_.inCoordCache()) {
2969                 /** FIXME: the code below adds an extraneous computation of
2970                  * inset positions, and can therefore be bad for performance
2971                  * (think for example about a very large tabular inset.
2972                  * Redawing the row where it is means redrawing the whole
2973                  * screen).
2974                  *
2975                  * The bug that this fixes is the following: assume that there
2976                  * is a very large math inset. Upon entering the inset, when
2977                  * pressing `End', the row is not scrolled and the cursor is
2978                  * not visible. The extra row computation makes sure that the
2979                  * inset positions are correctly computed and set in the
2980                  * cache. This would not happen if we did not have two-stage
2981                  * drawing.
2982                  *
2983                  * A proper fix would be to always have proper inset positions
2984                  * at this point.
2985                  */
2986                 // Force the recomputation of inset positions
2987                 bool const drawing = pi.pain.isDrawingEnabled();
2988                 pi.pain.setDrawingEnabled(false);
2989                 // No need to care about vertical position.
2990                 RowPainter rp(pi, buffer().text(), d->cursor_.bottom().pit(), row,
2991                               -d->horiz_scroll_offset_, 0);
2992                 rp.paintText();
2993                 pi.pain.setDrawingEnabled(drawing);
2994         }
2995
2996         // Current x position of the cursor in pixels
2997         int cur_x = getPos(d->cursor_).x_;
2998
2999         // Horizontal scroll offset of the cursor row in pixels
3000         int offset = d->horiz_scroll_offset_;
3001         int const MARGIN = 2 * theFontMetrics(d->cursor_.real_current_font).em()
3002                            + row.right_margin;
3003         if (row.right_x() <= workWidth() - row.right_margin) {
3004                 // Row is narrower than the work area, no offset needed.
3005                 offset = 0;
3006         } else {
3007                 if (cur_x - offset < MARGIN) {
3008                         // cursor would be too far right
3009                         offset = cur_x - MARGIN;
3010                 } else if (cur_x - offset > workWidth() - MARGIN) {
3011                         // cursor would be too far left
3012                         offset = cur_x - workWidth() + MARGIN;
3013                 }
3014                 // Correct the offset to make sure that we do not scroll too much
3015                 if (offset < 0)
3016                         offset = 0;
3017                 if (row.right_x() - offset < workWidth() - row.right_margin)
3018                         offset = row.right_x() - workWidth() + row.right_margin;
3019         }
3020
3021         //lyxerr << "cur_x=" << cur_x << ", offset=" << offset << ", row.wid=" << row.width() << ", margin=" << MARGIN << endl;
3022
3023         if (offset != d->horiz_scroll_offset_)
3024                 LYXERR(Debug::PAINTING, "Horiz. scroll offset changed from "
3025                        << d->horiz_scroll_offset_ << " to " << offset);
3026
3027         if (d->update_strategy_ == NoScreenUpdate
3028             && (offset != d->horiz_scroll_offset_
3029                 || !d->last_row_slice_.empty())) {
3030                 // FIXME: if one uses SingleParUpdate, then home/end
3031                 // will not work on long rows. Why?
3032                 d->update_strategy_ = FullScreenUpdate;
3033         }
3034
3035         d->horiz_scroll_offset_ = offset;
3036 }
3037
3038
3039 void BufferView::draw(frontend::Painter & pain)
3040 {
3041         if (height_ == 0 || width_ == 0)
3042                 return;
3043         LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
3044
3045         Text & text = buffer_.text();
3046         TextMetrics const & tm = d->text_metrics_[&text];
3047         int const y = tm.first().second->position();
3048         PainterInfo pi(this, pain);
3049
3050         // Check whether the row where the cursor lives needs to be scrolled.
3051         // Update the drawing strategy if needed.
3052         checkCursorScrollOffset(pi);
3053
3054         switch (d->update_strategy_) {
3055
3056         case NoScreenUpdate:
3057                 // If no screen painting is actually needed, only some the different
3058                 // coordinates of insets and paragraphs needs to be updated.
3059                 LYXERR(Debug::PAINTING, "Strategy: NoScreenUpdate");
3060                 pi.full_repaint = true;
3061                 pi.pain.setDrawingEnabled(false);
3062                 tm.draw(pi, 0, y);
3063                 break;
3064
3065         case SingleParUpdate:
3066                 pi.full_repaint = false;
3067                 LYXERR(Debug::PAINTING, "Strategy: SingleParUpdate");
3068                 // In general, only the current row of the outermost paragraph
3069                 // will be redrawn. Particular cases where selection spans
3070                 // multiple paragraph are correctly detected in TextMetrics.
3071                 tm.draw(pi, 0, y);
3072                 break;
3073
3074         case DecorationUpdate:
3075                 // FIXME: We should also distinguish DecorationUpdate to avoid text
3076                 // drawing if possible. This is not possible to do easily right now
3077                 // because of the single backing pixmap.
3078
3079         case FullScreenUpdate:
3080
3081                 LYXERR(Debug::PAINTING,
3082                        ((d->update_strategy_ == FullScreenUpdate)
3083                         ? "Strategy: FullScreenUpdate"
3084                         : "Strategy: DecorationUpdate"));
3085
3086                 // The whole screen, including insets, will be refreshed.
3087                 pi.full_repaint = true;
3088
3089                 // Clear background.
3090                 pain.fillRectangle(0, 0, width_, height_,
3091                         pi.backgroundColor(&buffer_.inset()));
3092
3093                 // Draw everything.
3094                 tm.draw(pi, 0, y);
3095
3096                 // and possibly grey out below
3097                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
3098                 int const y2 = lastpm.second->position() + lastpm.second->descent();
3099
3100                 if (y2 < height_) {
3101                         Color color = buffer().isInternal()
3102                                 ? Color_background : Color_bottomarea;
3103                         pain.fillRectangle(0, y2, width_, height_ - y2, color);
3104                 }
3105                 break;
3106         }
3107         LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
3108
3109         // The scrollbar needs an update.
3110         updateScrollbar();
3111
3112         // Normalize anchor for next time
3113         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
3114         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
3115         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
3116                 ParagraphMetrics const & pm = tm.parMetrics(pit);
3117                 if (pm.position() + pm.descent() > 0) {
3118                         d->anchor_pit_ = pit;
3119                         d->anchor_ypos_ = pm.position();
3120                         break;
3121                 }
3122         }
3123         LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
3124                 << "  anchor ypos = " << d->anchor_ypos_);
3125 }
3126
3127
3128 void BufferView::message(docstring const & msg)
3129 {
3130         if (d->gui_)
3131                 d->gui_->message(msg);
3132 }
3133
3134
3135 void BufferView::showDialog(string const & name)
3136 {
3137         if (d->gui_)
3138                 d->gui_->showDialog(name, string());
3139 }
3140
3141
3142 void BufferView::showDialog(string const & name,
3143         string const & data, Inset * inset)
3144 {
3145         if (d->gui_)
3146                 d->gui_->showDialog(name, data, inset);
3147 }
3148
3149
3150 void BufferView::updateDialog(string const & name, string const & data)
3151 {
3152         if (d->gui_)
3153                 d->gui_->updateDialog(name, data);
3154 }
3155
3156
3157 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
3158 {
3159         d->gui_ = gui;
3160 }
3161
3162
3163 // FIXME: Move this out of BufferView again
3164 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
3165 {
3166         if (!fname.isReadableFile()) {
3167                 docstring const error = from_ascii(strerror(errno));
3168                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
3169                 docstring const text =
3170                   bformat(_("Could not read the specified document\n"
3171                             "%1$s\ndue to the error: %2$s"), file, error);
3172                 Alert::error(_("Could not read file"), text);
3173                 return docstring();
3174         }
3175
3176         if (!fname.isReadableFile()) {
3177                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
3178                 docstring const text =
3179                   bformat(_("%1$s\n is not readable."), file);
3180                 Alert::error(_("Could not open file"), text);
3181                 return docstring();
3182         }
3183
3184         // FIXME UNICODE: We don't know the encoding of the file
3185         docstring file_content = fname.fileContents("UTF-8");
3186         if (file_content.empty()) {
3187                 Alert::error(_("Reading not UTF-8 encoded file"),
3188                              _("The file is not UTF-8 encoded.\n"
3189                                "It will be read as local 8Bit-encoded.\n"
3190                                "If this does not give the correct result\n"
3191                                "then please change the encoding of the file\n"
3192                                "to UTF-8 with a program other than LyX.\n"));
3193                 file_content = fname.fileContents("local8bit");
3194         }
3195
3196         return normalize_c(file_content);
3197 }
3198
3199
3200 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
3201 {
3202         docstring const tmpstr = contentsOfPlaintextFile(f);
3203
3204         if (tmpstr.empty())
3205                 return;
3206
3207         Cursor & cur = cursor();
3208         cap::replaceSelection(cur);
3209         buffer_.undo().recordUndo(cur);
3210         if (asParagraph)
3211                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr, cur.current_font);
3212         else
3213                 cur.innerText()->insertStringAsLines(cur, tmpstr, cur.current_font);
3214
3215         buffer_.changed(true);
3216 }
3217
3218
3219 docstring const & BufferView::inlineCompletion() const
3220 {
3221         return d->inlineCompletion_;
3222 }
3223
3224
3225 size_t const & BufferView::inlineCompletionUniqueChars() const
3226 {
3227         return d->inlineCompletionUniqueChars_;
3228 }
3229
3230
3231 DocIterator const & BufferView::inlineCompletionPos() const
3232 {
3233         return d->inlineCompletionPos_;
3234 }
3235
3236
3237 void BufferView::resetInlineCompletionPos()
3238 {
3239         d->inlineCompletionPos_ = DocIterator();
3240 }
3241
3242
3243 bool samePar(DocIterator const & a, DocIterator const & b)
3244 {
3245         if (a.empty() && b.empty())
3246                 return true;
3247         if (a.empty() || b.empty())
3248                 return false;
3249         if (a.depth() != b.depth())
3250                 return false;
3251         return &a.innerParagraph() == &b.innerParagraph();
3252 }
3253
3254
3255 void BufferView::setInlineCompletion(Cursor const & cur, DocIterator const & pos,
3256         docstring const & completion, size_t uniqueChars)
3257 {
3258         uniqueChars = min(completion.size(), uniqueChars);
3259         bool changed = d->inlineCompletion_ != completion
3260                 || d->inlineCompletionUniqueChars_ != uniqueChars;
3261         bool singlePar = true;
3262         d->inlineCompletion_ = completion;
3263         d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
3264
3265         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
3266
3267         // at new position?
3268         DocIterator const & old = d->inlineCompletionPos_;
3269         if (old != pos) {
3270                 //lyxerr << "inlineCompletionPos changed" << std::endl;
3271                 // old or pos are in another paragraph?
3272                 if ((!samePar(cur, pos) && !pos.empty())
3273                     || (!samePar(cur, old) && !old.empty())) {
3274                         singlePar = false;
3275                         //lyxerr << "different paragraph" << std::endl;
3276                 }
3277                 d->inlineCompletionPos_ = pos;
3278         }
3279
3280         // set update flags
3281         if (changed) {
3282                 if (singlePar && !(cur.result().screenUpdate() & Update::Force))
3283                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
3284                 else
3285                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::Force);
3286         }
3287 }
3288
3289
3290 bool BufferView::clickableInset() const
3291 {
3292         return d->clickable_inset_;
3293 }
3294
3295 } // namespace lyx