src/BufferView.cpp

   1 /**
   2  * \file BufferView.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Alfredo Braunstein
   7  * \author Lars Gullik Bjønnes
   8  * \author John Levon
   9  * \author André Pönitz
  10  * \author Jürgen Vigna
  11  *
  12  * Full author contact details are available in file CREDITS.
  13  */
  14
  15 #include <config.h>
  16
  17 #include "BufferView.h"
  18
  19 #include "BranchList.h"
  20 #include "Buffer.h"
  21 #include "buffer_funcs.h"
  22 #include "BufferList.h"
  23 #include "BufferParams.h"
  24 #include "CoordCache.h"
  25 #include "Cursor.h"
  26 #include "CutAndPaste.h"
  27 #include "DispatchResult.h"
  28 #include "ErrorList.h"
  29 #include "factory.h"
  30 #include "FloatList.h"
  31 #include "FuncRequest.h"
  32 #include "FuncStatus.h"
  33 #include "Intl.h"
  34 #include "InsetIterator.h"
  35 #include "Language.h"
  36 #include "LaTeXFeatures.h"
  37 #include "LayoutFile.h"
  38 #include "Lexer.h"
  39 #include "LyX.h"
  40 #include "LyXAction.h"
  41 #include "lyxfind.h"
  42 #include "LyXFunc.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 "Session.h"
  50 #include "Text.h"
  51 #include "TextClass.h"
  52 #include "TextMetrics.h"
  53 #include "TexRow.h"
  54 #include "TocBackend.h"
  55 #include "VSpace.h"
  56 #include "WordLangTuple.h"
  57
  58 #include "insets/InsetBibtex.h"
  59 #include "insets/InsetCommand.h" // ChangeRefs
  60 #include "insets/InsetExternal.h"
  61 #include "insets/InsetGraphics.h"
  62 #include "insets/InsetRef.h"
  63 #include "insets/InsetText.h"
  64 #include "insets/InsetNote.h"
  65
  66 #include "frontends/alert.h"
  67 #include "frontends/Application.h"
  68 #include "frontends/Delegates.h"
  69 #include "frontends/FontMetrics.h"
  70 #include "frontends/Painter.h"
  71 #include "frontends/Selection.h"
  72
  73 #include "graphics/Previews.h"
  74
  75 #include "support/convert.h"
  76 #include "support/debug.h"
  77 #include "support/ExceptionMessage.h"
  78 #include "support/filetools.h"
  79 #include "support/gettext.h"
  80 #include "support/lstrings.h"
  81 #include "support/Package.h"
  82 #include "support/types.h"
  83
  84 #include <cerrno>
  85 #include <fstream>
  86 #include <functional>
  87 #include <iterator>
  88 #include <sstream>
  89 #include <vector>
  90
  91 using namespace std;
  92 using namespace lyx::support;
  93
  94 namespace lyx {
  95
  96 namespace Alert = frontend::Alert;
  97
  98 namespace {
  99
 100 /// Return an inset of this class if it exists at the current cursor position
 101 template <class T>
 102 T * getInsetByCode(Cursor const & cur, InsetCode code)
 103 {
 104         DocIterator it = cur;
 105         Inset * inset = it.nextInset();
 106         if (inset && inset->lyxCode() == code)
 107                 return static_cast<T*>(inset);
 108         return 0;
 109 }
 110
 111
 112 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 113         bool same_content);
 114
 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                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()
 124                     && (contents.empty() ||
 125                     static_cast<InsetCommand const *>(inset)->getFirstNonOptParam() == contents)) {
 126                         dit = tmpdit;
 127                         return true;
 128                 }
 129                 tmpdit.forwardInset();
 130         }
 131
 132         return false;
 133 }
 134
 135
 136 /// Looks for next inset with one of the given codes.
 137 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 138         bool same_content)
 139 {
 140         docstring contents;
 141         DocIterator tmpdit = dit;
 142         tmpdit.forwardInset();
 143         if (!tmpdit)
 144                 return false;
 145
 146         if (same_content) {
 147                 Inset const * inset = tmpdit.nextInset();
 148                 if (inset
 149                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()) {
 150                         contents = static_cast<InsetCommand const *>(inset)->getFirstNonOptParam();
 151                 }
 152         }
 153
 154         if (!findNextInset(tmpdit, codes, contents)) {
 155                 if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
 156                         Inset * inset = &tmpdit.bottom().inset();
 157                         tmpdit = doc_iterator_begin(&inset->buffer(), inset);
 158                         if (!findNextInset(tmpdit, codes, contents))
 159                                 return false;
 160                 } else {
 161                         return false;
 162                 }
 163         }
 164
 165         dit = tmpdit;
 166         return true;
 167 }
 168
 169
 170 /// Looks for next inset with the given code
 171 void findInset(DocIterator & dit, InsetCode code, bool same_content)
 172 {
 173         findInset(dit, vector<InsetCode>(1, code), same_content);
 174 }
 175
 176
 177 /// Moves cursor to the next inset with one of the given codes.
 178 void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
 179                bool same_content)
 180 {
 181         Cursor tmpcur = bv->cursor();
 182         if (!findInset(tmpcur, codes, same_content)) {
 183                 bv->cursor().message(_("No more insets"));
 184                 return;
 185         }
 186
 187         tmpcur.clearSelection();
 188         bv->setCursor(tmpcur);
 189         bv->showCursor();
 190 }
 191
 192
 193 /// Moves cursor to the next inset with given code.
 194 void gotoInset(BufferView * bv, InsetCode code, bool same_content)
 195 {
 196         gotoInset(bv, vector<InsetCode>(1, code), same_content);
 197 }
 198
 199
 200 /// A map from a Text to the associated text metrics
 201 typedef map<Text const *, TextMetrics> TextMetricsCache;
 202
 203 enum ScreenUpdateStrategy {
 204         NoScreenUpdate,
 205         SingleParUpdate,
 206         FullScreenUpdate,
 207         DecorationUpdate
 208 };
 209
 210 } // anon namespace
 211
 212
 213 /////////////////////////////////////////////////////////////////////
 214 //
 215 // BufferView
 216 //
 217 /////////////////////////////////////////////////////////////////////
 218
 219 struct BufferView::Private
 220 {
 221         Private(BufferView & bv): wh_(0), cursor_(bv),
 222                 anchor_pit_(0), anchor_ypos_(0),
 223                 inlineCompletionUniqueChars_(0),
 224                 last_inset_(0), bookmark_edit_position_(0), gui_(0)
 225         {}
 226
 227         ///
 228         ScrollbarParameters scrollbarParameters_;
 229         ///
 230         ScreenUpdateStrategy update_strategy_;
 231         ///
 232         CoordCache coord_cache_;
 233
 234         /// Estimated average par height for scrollbar.
 235         int wh_;
 236         /// this is used to handle XSelection events in the right manner.
 237         struct {
 238                 CursorSlice cursor;
 239                 CursorSlice anchor;
 240                 bool set;
 241         } xsel_cache_;
 242         ///
 243         Cursor cursor_;
 244         ///
 245         pit_type anchor_pit_;
 246         ///
 247         int anchor_ypos_;
 248         ///
 249         vector<int> par_height_;
 250
 251         ///
 252         DocIterator inlineCompletionPos_;
 253         ///
 254         docstring inlineCompletion_;
 255         ///
 256         size_t inlineCompletionUniqueChars_;
 257
 258         /// keyboard mapping object.
 259         Intl intl_;
 260
 261         /// last visited inset.
 262         /** kept to send setMouseHover(false).
 263           * Not owned, so don't delete.
 264           */
 265         Inset * last_inset_;
 266
 267         // cache for id of the paragraph which was edited the last time
 268         int bookmark_edit_position_;
 269
 270         mutable TextMetricsCache text_metrics_;
 271
 272         /// Whom to notify.
 273         /** Not owned, so don't delete.
 274           */
 275         frontend::GuiBufferViewDelegate * gui_;
 276
 277         /// Cache for Find Next
 278         FuncRequest search_request_cache_;
 279
 280         ///
 281         map<string, Inset *> edited_insets_;
 282 };
 283
 284
 285 BufferView::BufferView(Buffer & buf)
 286         : width_(0), height_(0), full_screen_(false), buffer_(buf),
 287       d(new Private(*this))
 288 {
 289         d->xsel_cache_.set = false;
 290         d->intl_.initKeyMapper(lyxrc.use_kbmap);
 291
 292         d->cursor_.setBuffer(&buf);
 293         d->cursor_.push(buffer_.inset());
 294         d->cursor_.resetAnchor();
 295         d->cursor_.setCurrentFont();
 296
 297         if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 298                 thePreviews().generateBufferPreviews(buffer_);
 299 }
 300
 301
 302 BufferView::~BufferView()
 303 {
 304         // current buffer is going to be switched-off, save cursor pos
 305         // Ideally, the whole cursor stack should be saved, but session
 306         // currently can only handle bottom (whole document) level pit and pos.
 307         // That is to say, if a cursor is in a nested inset, it will be
 308         // restore to the left of the top level inset.
 309         LastFilePosSection::FilePos fp;
 310         fp.pit = d->cursor_.bottom().pit();
 311         fp.pos = d->cursor_.bottom().pos();
 312         theSession().lastFilePos().save(buffer_.fileName(), fp);
 313
 314         delete d;
 315 }
 316
 317
 318 int BufferView::rightMargin() const
 319 {
 320         // The additional test for the case the outliner is opened.
 321         if (!full_screen_ ||
 322                 !lyxrc.full_screen_limit ||
 323                 width_ < lyxrc.full_screen_width + 20)
 324                         return 10;
 325
 326         return (width_ - lyxrc.full_screen_width) / 2;
 327 }
 328
 329
 330 int BufferView::leftMargin() const
 331 {
 332         return rightMargin();
 333 }
 334
 335
 336 bool BufferView::isTopScreen() const
 337 {
 338         return d->scrollbarParameters_.position == d->scrollbarParameters_.min;
 339 }
 340
 341
 342 bool BufferView::isBottomScreen() const
 343 {
 344         return d->scrollbarParameters_.position == d->scrollbarParameters_.max;
 345 }
 346
 347
 348 Intl & BufferView::getIntl()
 349 {
 350         return d->intl_;
 351 }
 352
 353
 354 Intl const & BufferView::getIntl() const
 355 {
 356         return d->intl_;
 357 }
 358
 359
 360 CoordCache & BufferView::coordCache()
 361 {
 362         return d->coord_cache_;
 363 }
 364
 365
 366 CoordCache const & BufferView::coordCache() const
 367 {
 368         return d->coord_cache_;
 369 }
 370
 371
 372 Buffer & BufferView::buffer()
 373 {
 374         return buffer_;
 375 }
 376
 377
 378 Buffer const & BufferView::buffer() const
 379 {
 380         return buffer_;
 381 }
 382
 383
 384 bool BufferView::fitCursor()
 385 {
 386         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
 387                 frontend::FontMetrics const & fm =
 388                         theFontMetrics(d->cursor_.getFont().fontInfo());
 389                 int const asc = fm.maxAscent();
 390                 int const des = fm.maxDescent();
 391                 Point const p = getPos(d->cursor_, d->cursor_.boundary());
 392                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 393                         return false;
 394         }
 395         return true;
 396 }
 397
 398
 399 void BufferView::processUpdateFlags(Update::flags flags)
 400 {
 401         // last_inset_ points to the last visited inset. This pointer may become
 402         // invalid because of keyboard editing. Since all such operations
 403         // causes screen update(), I reset last_inset_ to avoid such a problem.
 404         d->last_inset_ = 0;
 405         // This is close to a hot-path.
 406         LYXERR(Debug::DEBUG, "BufferView::processUpdateFlags()"
 407                 << "[fitcursor = " << (flags & Update::FitCursor)
 408                 << ", forceupdate = " << (flags & Update::Force)
 409                 << ", singlepar = " << (flags & Update::SinglePar)
 410                 << "]  buffer: " << &buffer_);
 411
 412         buffer_.updateMacros();
 413
 414         // Now do the first drawing step if needed. This consists on updating
 415         // the CoordCache in updateMetrics().
 416         // The second drawing step is done in WorkArea::redraw() if needed.
 417
 418         // Case when no explicit update is requested.
 419         if (!flags) {
 420                 // no need to redraw anything.
 421                 d->update_strategy_ = NoScreenUpdate;
 422                 return;
 423         }
 424
 425         if (flags == Update::Decoration) {
 426                 d->update_strategy_ = DecorationUpdate;
 427                 buffer_.changed();
 428                 return;
 429         }
 430
 431         if (flags == Update::FitCursor
 432                 || flags == (Update::Decoration | Update::FitCursor)) {
 433                 // tell the frontend to update the screen if needed.
 434                 if (fitCursor()) {
 435                         showCursor();
 436                         return;
 437                 }
 438                 if (flags & Update::Decoration) {
 439                         d->update_strategy_ = DecorationUpdate;
 440                         buffer_.changed();
 441                         return;
 442                 }
 443                 // no screen update is needed.
 444                 d->update_strategy_ = NoScreenUpdate;
 445                 return;
 446         }
 447
 448         bool const full_metrics = flags & Update::Force || !singleParUpdate();
 449
 450         if (full_metrics)
 451                 // We have to update the full screen metrics.
 452                 updateMetrics();
 453
 454         if (!(flags & Update::FitCursor)) {
 455                 // Nothing to do anymore. Trigger a redraw and return
 456                 buffer_.changed();
 457                 return;
 458         }
 459
 460         // updateMetrics() does not update paragraph position
 461         // This is done at draw() time. So we need a redraw!
 462         buffer_.changed();
 463
 464         if (fitCursor()) {
 465                 // The cursor is off screen so ensure it is visible.
 466                 // refresh it:
 467                 showCursor();
 468         }
 469 }
 470
 471
 472 void BufferView::updateScrollbar()
 473 {
 474         if (height_ == 0 && width_ == 0)
 475                 return;
 476
 477         // We prefer fixed size line scrolling.
 478         d->scrollbarParameters_.single_step = defaultRowHeight();
 479         // We prefer full screen page scrolling.
 480         d->scrollbarParameters_.page_step = height_;
 481
 482         Text & t = buffer_.text();
 483         TextMetrics & tm = d->text_metrics_[&t];
 484
 485         LYXERR(Debug::GUI, " Updating scrollbar: height: "
 486                 << t.paragraphs().size()
 487                 << " curr par: " << d->cursor_.bottom().pit()
 488                 << " default height " << defaultRowHeight());
 489
 490         size_t const parsize = t.paragraphs().size();
 491         if (d->par_height_.size() != parsize) {
 492                 d->par_height_.clear();
 493                 // FIXME: We assume a default paragraph height of 2 rows. This
 494                 // should probably be pondered with the screen width.
 495                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
 496         }
 497
 498         // Look at paragraph heights on-screen
 499         pair<pit_type, ParagraphMetrics const *> first = tm.first();
 500         pair<pit_type, ParagraphMetrics const *> last = tm.last();
 501         for (pit_type pit = first.first; pit <= last.first; ++pit) {
 502                 d->par_height_[pit] = tm.parMetrics(pit).height();
 503                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
 504                         << d->par_height_[pit]);
 505         }
 506
 507         int top_pos = first.second->position() - first.second->ascent();
 508         int bottom_pos = last.second->position() + last.second->descent();
 509         bool first_visible = first.first == 0 && top_pos >= 0;
 510         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
 511         if (first_visible && last_visible) {
 512                 d->scrollbarParameters_.min = 0;
 513                 d->scrollbarParameters_.max = 0;
 514                 return;
 515         }
 516
 517         d->scrollbarParameters_.min = top_pos;
 518         for (size_t i = 0; i != size_t(first.first); ++i)
 519                 d->scrollbarParameters_.min -= d->par_height_[i];
 520         d->scrollbarParameters_.max = bottom_pos;
 521         for (size_t i = last.first + 1; i != parsize; ++i)
 522                 d->scrollbarParameters_.max += d->par_height_[i];
 523
 524         d->scrollbarParameters_.position = 0;
 525         // The reference is the top position so we remove one page.
 526         if (lyxrc.scroll_below_document)
 527                 d->scrollbarParameters_.max -= minVisiblePart();
 528         else
 529                 d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 530 }
 531
 532
 533 ScrollbarParameters const & BufferView::scrollbarParameters() const
 534 {
 535         return d->scrollbarParameters_;
 536 }
 537
 538
 539 docstring BufferView::toolTip(int x, int y) const
 540 {
 541         // Get inset under mouse, if there is one.
 542         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 543         if (!covering_inset)
 544                 // No inset, no tooltip...
 545                 return docstring();
 546         return covering_inset->toolTip(*this, x, y);
 547 }
 548
 549
 550 docstring BufferView::contextMenu(int x, int y) const
 551 {
 552         //If there is a selection, return the containing inset menu
 553         if (d->cursor_.selection())
 554                 return d->cursor_.inset().contextMenu(*this, x, y);
 555
 556         // Get inset under mouse, if there is one.
 557         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 558         if (covering_inset)
 559                 return covering_inset->contextMenu(*this, x, y);
 560
 561         return buffer_.inset().contextMenu(*this, x, y);
 562 }
 563
 564
 565 void BufferView::scrollDocView(int value)
 566 {
 567         int const offset = value - d->scrollbarParameters_.position;
 568
 569         // No scrolling at all? No need to redraw anything
 570         if (offset == 0)
 571                 return;
 572
 573         // If the offset is less than 2 screen height, prefer to scroll instead.
 574         if (abs(offset) <= 2 * height_) {
 575                 d->anchor_ypos_ -= offset;
 576                 updateMetrics();
 577                 buffer_.changed();
 578                 return;
 579         }
 580
 581         // cut off at the top
 582         if (value <= d->scrollbarParameters_.min) {
 583                 DocIterator dit = doc_iterator_begin(&buffer_);
 584                 showCursor(dit);
 585                 LYXERR(Debug::SCROLLING, "scroll to top");
 586                 return;
 587         }
 588
 589         // cut off at the bottom
 590         if (value >= d->scrollbarParameters_.max) {
 591                 DocIterator dit = doc_iterator_end(&buffer_);
 592                 dit.backwardPos();
 593                 showCursor(dit);
 594                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 595                 return;
 596         }
 597
 598         // find paragraph at target position
 599         int par_pos = d->scrollbarParameters_.min;
 600         pit_type i = 0;
 601         for (; i != int(d->par_height_.size()); ++i) {
 602                 par_pos += d->par_height_[i];
 603                 if (par_pos >= value)
 604                         break;
 605         }
 606
 607         if (par_pos < value) {
 608                 // It seems we didn't find the correct pit so stay on the safe side and
 609                 // scroll to bottom.
 610                 LYXERR0("scrolling position not found!");
 611                 scrollDocView(d->scrollbarParameters_.max);
 612                 return;
 613         }
 614
 615         DocIterator dit = doc_iterator_begin(&buffer_);
 616         dit.pit() = i;
 617         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 618         showCursor(dit);
 619 }
 620
 621
 622 // FIXME: this method is not working well.
 623 void BufferView::setCursorFromScrollbar()
 624 {
 625         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 626
 627         int const height = 2 * defaultRowHeight();
 628         int const first = height;
 629         int const last = height_ - height;
 630         int newy = 0;
 631         Cursor const & oldcur = d->cursor_;
 632
 633         switch (cursorStatus(oldcur)) {
 634         case CUR_ABOVE:
 635                 newy = first;
 636                 break;
 637         case CUR_BELOW:
 638                 newy = last;
 639                 break;
 640         case CUR_INSIDE:
 641                 int const y = getPos(oldcur, oldcur.boundary()).y_;
 642                 newy = min(last, max(y, first));
 643                 if (y == newy)
 644                         return;
 645         }
 646         // We reset the cursor because cursorStatus() does not
 647         // work when the cursor is within mathed.
 648         Cursor cur(*this);
 649         cur.reset();
 650         tm.setCursorFromCoordinates(cur, 0, newy);
 651
 652         // update the bufferview cursor and notify insets
 653         // FIXME: Care about the d->cursor_ flags to redraw if needed
 654         Cursor old = d->cursor_;
 655         mouseSetCursor(cur);
 656         bool badcursor = notifyCursorLeavesOrEnters(old, d->cursor_);
 657         if (badcursor)
 658                 d->cursor_.fixIfBroken();
 659 }
 660
 661
 662 Change const BufferView::getCurrentChange() const
 663 {
 664         if (!d->cursor_.selection())
 665                 return Change(Change::UNCHANGED);
 666
 667         DocIterator dit = d->cursor_.selectionBegin();
 668         return dit.paragraph().lookupChange(dit.pos());
 669 }
 670
 671
 672 // this could be used elsewhere as well?
 673 // FIXME: This does not work within mathed!
 674 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 675 {
 676         Point const p = getPos(dit, dit.boundary());
 677         if (p.y_ < 0)
 678                 return CUR_ABOVE;
 679         if (p.y_ > workHeight())
 680                 return CUR_BELOW;
 681         return CUR_INSIDE;
 682 }
 683
 684
 685 void BufferView::bookmarkEditPosition()
 686 {
 687         // Don't eat cpu time for each keystroke
 688         if (d->cursor_.paragraph().id() == d->bookmark_edit_position_)
 689                 return;
 690         saveBookmark(0);
 691         d->bookmark_edit_position_ = d->cursor_.paragraph().id();
 692 }
 693
 694
 695 void BufferView::saveBookmark(unsigned int idx)
 696 {
 697         // tentatively save bookmark, id and pos will be used to
 698         // acturately locate a bookmark in a 'live' lyx session.
 699         // pit and pos will be updated with bottom level pit/pos
 700         // when lyx exits.
 701         theSession().bookmarks().save(
 702                 buffer_.fileName(),
 703                 d->cursor_.bottom().pit(),
 704                 d->cursor_.bottom().pos(),
 705                 d->cursor_.paragraph().id(),
 706                 d->cursor_.pos(),
 707                 idx
 708         );
 709         if (idx)
 710                 // emit message signal.
 711                 message(_("Save bookmark"));
 712 }
 713
 714
 715 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 716         int top_id, pos_type top_pos)
 717 {
 718         bool success = false;
 719         DocIterator dit;
 720
 721         d->cursor_.clearSelection();
 722
 723         // if a valid par_id is given, try it first
 724         // This is the case for a 'live' bookmark when unique paragraph ID
 725         // is used to track bookmarks.
 726         if (top_id > 0) {
 727                 dit = buffer_.getParFromID(top_id);
 728                 if (!dit.atEnd()) {
 729                         dit.pos() = min(dit.paragraph().size(), top_pos);
 730                         // Some slices of the iterator may not be
 731                         // reachable (e.g. closed collapsable inset)
 732                         // so the dociterator may need to be
 733                         // shortened. Otherwise, setCursor may crash
 734                         // lyx when the cursor can not be set to these
 735                         // insets.
 736                         size_t const n = dit.depth();
 737                         for (size_t i = 0; i < n; ++i)
 738                                 if (!dit[i].inset().editable()) {
 739                                         dit.resize(i);
 740                                         break;
 741                                 }
 742                         success = true;
 743                 }
 744         }
 745
 746         // if top_id == 0, or searching through top_id failed
 747         // This is the case for a 'restored' bookmark when only bottom
 748         // (document level) pit was saved. Because of this, bookmark
 749         // restoration is inaccurate. If a bookmark was within an inset,
 750         // it will be restored to the left of the outmost inset that contains
 751         // the bookmark.
 752         if (bottom_pit < int(buffer_.paragraphs().size())) {
 753                 dit = doc_iterator_begin(&buffer_);
 754
 755                 dit.pit() = bottom_pit;
 756                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 757                 success = true;
 758         }
 759
 760         if (success) {
 761                 // Note: only bottom (document) level pit is set.
 762                 setCursor(dit);
 763                 // set the current font.
 764                 d->cursor_.setCurrentFont();
 765                 // To center the screen on this new position we need the
 766                 // paragraph position which is computed at draw() time.
 767                 // So we need a redraw!
 768                 buffer_.changed();
 769                 if (fitCursor())
 770                         showCursor();
 771         }
 772
 773         return success;
 774 }
 775
 776
 777 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 778 {
 779         if (lyxrc.rtl_support) {
 780                 if (d->cursor_.real_current_font.isRightToLeft()) {
 781                         if (d->intl_.keymap == Intl::PRIMARY)
 782                                 d->intl_.keyMapSec();
 783                 } else {
 784                         if (d->intl_.keymap == Intl::SECONDARY)
 785                                 d->intl_.keyMapPrim();
 786                 }
 787         }
 788
 789         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 790 }
 791
 792
 793 int BufferView::workWidth() const
 794 {
 795         return width_;
 796 }
 797
 798
 799 void BufferView::recenter()
 800 {
 801         showCursor(d->cursor_, true);
 802 }
 803
 804
 805 void BufferView::showCursor()
 806 {
 807         showCursor(d->cursor_, false);
 808 }
 809
 810
 811 void BufferView::showCursor(DocIterator const & dit, bool recenter)
 812 {
 813         if (scrollToCursor(dit, recenter))
 814                 buffer_.changed();
 815 }
 816
 817
 818 void BufferView::scrollToCursor()
 819 {
 820         scrollToCursor(d->cursor_, false);
 821 }
 822
 823
 824 bool BufferView::scrollToCursor(DocIterator const & dit, bool recenter)
 825 {
 826         // We are not properly started yet, delay until resizing is
 827         // done.
 828         if (height_ == 0)
 829                 return false;
 830
 831         LYXERR(Debug::SCROLLING, "recentering!");
 832
 833         CursorSlice const & bot = dit.bottom();
 834         TextMetrics & tm = d->text_metrics_[bot.text()];
 835
 836         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 837         int bot_pit = bot.pit();
 838         if (bot_pit > max_pit) {
 839                 // FIXME: Why does this happen?
 840                 LYXERR0("bottom pit is greater that max pit: "
 841                         << bot_pit << " > " << max_pit);
 842                 bot_pit = max_pit;
 843         }
 844
 845         if (bot_pit == tm.first().first - 1)
 846                 tm.newParMetricsUp();
 847         else if (bot_pit == tm.last().first + 1)
 848                 tm.newParMetricsDown();
 849
 850         if (tm.contains(bot_pit)) {
 851                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 852                 LASSERT(!pm.rows().empty(), /**/);
 853                 // FIXME: smooth scrolling doesn't work in mathed.
 854                 CursorSlice const & cs = dit.innerTextSlice();
 855                 int offset = coordOffset(dit, dit.boundary()).y_;
 856                 int ypos = pm.position() + offset;
 857                 Dimension const & row_dim =
 858                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 859                 int scrolled = 0;
 860                 if (recenter)
 861                         scrolled = scroll(ypos - height_/2);
 862                 else if (ypos - row_dim.ascent() < 0)
 863                         scrolled = scrollUp(- ypos + row_dim.ascent());
 864                 else if (ypos + row_dim.descent() > height_)
 865                         scrolled = scrollDown(ypos - height_ + defaultRowHeight() );
 866
 867                 // else, nothing to do, the cursor is already visible so we just return.
 868                 if (scrolled != 0) {
 869                         updateMetrics();
 870                         return true;
 871                 }
 872                 return false;
 873         }
 874
 875         // fix inline completion position
 876         if (d->inlineCompletionPos_.fixIfBroken())
 877                 d->inlineCompletionPos_ = DocIterator();
 878
 879         tm.redoParagraph(bot_pit);
 880         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 881         int offset = coordOffset(dit, dit.boundary()).y_;
 882
 883         d->anchor_pit_ = bot_pit;
 884         CursorSlice const & cs = dit.innerTextSlice();
 885         Dimension const & row_dim =
 886                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 887
 888         if (recenter)
 889                 d->anchor_ypos_ = height_/2;
 890         else if (d->anchor_pit_ == 0)
 891                 d->anchor_ypos_ = offset + pm.ascent();
 892         else if (d->anchor_pit_ == max_pit)
 893                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
 894         else if (offset > height_)
 895                 d->anchor_ypos_ = height_ - offset - defaultRowHeight();
 896         else
 897                 d->anchor_ypos_ = defaultRowHeight() * 2;
 898
 899         updateMetrics();
 900         return true;
 901 }
 902
 903
 904 void BufferView::updateLayout(DocumentClass const * const oldlayout)
 905 {
 906         message(_("Converting document to new document class..."));
 907
 908         StableDocIterator backcur(d->cursor_);
 909         ErrorList & el = buffer_.errorList("Class Switch");
 910         cap::switchBetweenClasses(
 911                         oldlayout, buffer_.params().documentClassPtr(),
 912                         static_cast<InsetText &>(buffer_.inset()), el);
 913
 914         setCursor(backcur.asDocIterator(&buffer_));
 915
 916         buffer_.errors("Class Switch");
 917         buffer_.updateLabels();
 918 }
 919
 920 /** Return the change status at cursor position, taking in account the
 921  * status at each level of the document iterator (a table in a deleted
 922  * footnote is deleted).
 923  * When \param outer is true, the top slice is not looked at.
 924  */
 925 static Change::Type lookupChangeType(DocIterator const & dit, bool outer = false)
 926 {
 927         size_t const depth = dit.depth() - (outer ? 1 : 0);
 928
 929         for (size_t i = 0 ; i < depth ; ++i) {
 930                 CursorSlice const & slice = dit[i];
 931                 if (!slice.inset().inMathed()
 932                     && slice.pos() < slice.paragraph().size()) {
 933                         Change::Type const ch = slice.paragraph().lookupChange(slice.pos()).type;
 934                         if (ch != Change::UNCHANGED)
 935                                 return ch;
 936                 }
 937         }
 938         return Change::UNCHANGED;
 939 }
 940
 941
 942 bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
 943 {
 944         // Can we use a readonly buffer?
 945         if (buffer_.isReadonly()
 946             && !lyxaction.funcHasFlag(cmd.action, LyXAction::ReadOnly)
 947             && !lyxaction.funcHasFlag(cmd.action, LyXAction::NoBuffer)) {
 948                 flag.message(from_utf8(N_("Document is read-only")));
 949                 flag.setEnabled(false);
 950                 return true;
 951         }
 952         // Are we in a DELETED change-tracking region?
 953         if (lookupChangeType(d->cursor_, true) == Change::DELETED
 954             && !lyxaction.funcHasFlag(cmd.action, LyXAction::ReadOnly)
 955             && !lyxaction.funcHasFlag(cmd.action, LyXAction::NoBuffer)) {
 956                 flag.message(from_utf8(N_("This portion of the document is deleted.")));
 957                 flag.setEnabled(false);
 958                 return true;
 959         }
 960
 961         Cursor & cur = d->cursor_;
 962
 963         if (cur.getStatus(cmd, flag))
 964                 return true;
 965
 966         switch (cmd.action) {
 967
 968         // FIXME: This is a bit problematic because we don't check is this is a
 969         // document BufferView or not for these LFUNs. We probably have to
 970         // dispatch both to currentBufferView() and, if that fails,
 971         // to documentBufferView(); same as we do know for current Buffer and
 972         // document Buffer. Ideally those LFUN should go to Buffer as they*
 973         // operate on the full Buffer and the cursor is only needed either for
 974         // an Undo record or to restore a cursor position. But we don't know
 975         // how to do that inside Buffer of course.
 976         case LFUN_BUFFER_PARAMS_APPLY:
 977         case LFUN_LAYOUT_MODULES_CLEAR:
 978         case LFUN_LAYOUT_MODULE_ADD:
 979         case LFUN_LAYOUT_RELOAD:
 980         case LFUN_TEXTCLASS_APPLY:
 981         case LFUN_TEXTCLASS_LOAD:
 982                 flag.setEnabled(!buffer_.isReadonly());
 983                 break;
 984
 985         case LFUN_UNDO:
 986                 flag.setEnabled(buffer_.undo().hasUndoStack());
 987                 break;
 988         case LFUN_REDO:
 989                 flag.setEnabled(buffer_.undo().hasRedoStack());
 990                 break;
 991         case LFUN_FILE_INSERT:
 992         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 993         case LFUN_FILE_INSERT_PLAINTEXT:
 994         case LFUN_BOOKMARK_SAVE:
 995                 // FIXME: Actually, these LFUNS should be moved to Text
 996                 flag.setEnabled(cur.inTexted());
 997                 break;
 998
 999         case LFUN_FONT_STATE:
1000         case LFUN_LABEL_INSERT:
1001         case LFUN_INFO_INSERT:
1002         case LFUN_INSET_EDIT:
1003         case LFUN_PARAGRAPH_GOTO:
1004         case LFUN_NOTE_NEXT:
1005         case LFUN_REFERENCE_NEXT:
1006         case LFUN_WORD_FIND:
1007         case LFUN_WORD_FIND_FORWARD:
1008         case LFUN_WORD_FIND_BACKWARD:
1009         case LFUN_WORD_FINDADV:
1010         case LFUN_WORD_REPLACE:
1011         case LFUN_MARK_OFF:
1012         case LFUN_MARK_ON:
1013         case LFUN_MARK_TOGGLE:
1014         case LFUN_SCREEN_RECENTER:
1015         case LFUN_SCREEN_SHOW_CURSOR:
1016         case LFUN_BIBTEX_DATABASE_ADD:
1017         case LFUN_BIBTEX_DATABASE_DEL:
1018         case LFUN_NOTES_MUTATE:
1019         case LFUN_ALL_INSETS_TOGGLE:
1020         case LFUN_STATISTICS:
1021         case LFUN_BRANCH_ADD_INSERT:
1022         case LFUN_KEYMAP_OFF:
1023         case LFUN_KEYMAP_PRIMARY:
1024         case LFUN_KEYMAP_SECONDARY:
1025         case LFUN_KEYMAP_TOGGLE:
1026                 flag.setEnabled(true);
1027                 break;
1028
1029         case LFUN_REGEXP_MODE:
1030                 // FIXME: Test if current WorkArea is the search WorkArea
1031                 flag.setEnabled(buffer().isInternal() && !cur.inRegexped());
1032                 break;
1033
1034         case LFUN_LABEL_COPY_AS_REF: {
1035                 // if there is an inset at cursor, see whether it
1036                 // handles the lfun
1037                 Inset * inset = cur.nextInset();
1038                 if (!inset || !inset->getStatus(cur, cmd, flag))
1039                         flag.setEnabled(false);
1040                 break;
1041         }
1042
1043         case LFUN_NEXT_INSET_MODIFY: {
1044                 // this is the real function we want to invoke
1045                 FuncRequest tmpcmd = cmd;
1046                 tmpcmd.action = LFUN_INSET_MODIFY;
1047                 // if there is an inset at cursor, see whether it
1048                 // handles the lfun, other start from scratch
1049                 Inset * inset = cur.nextInset();
1050                 if (!inset || !inset->getStatus(cur, tmpcmd, flag))
1051                         flag = lyx::getStatus(tmpcmd);
1052                 break;
1053         }
1054
1055         case LFUN_LABEL_GOTO: {
1056                 flag.setEnabled(!cmd.argument().empty()
1057                     || getInsetByCode<InsetRef>(cur, REF_CODE));
1058                 break;
1059         }
1060
1061         case LFUN_CHANGES_TRACK:
1062                 flag.setEnabled(true);
1063                 flag.setOnOff(buffer_.params().trackChanges);
1064                 break;
1065
1066         case LFUN_CHANGES_OUTPUT:
1067                 flag.setEnabled(true);
1068                 flag.setOnOff(buffer_.params().outputChanges);
1069                 break;
1070
1071         case LFUN_CHANGES_MERGE:
1072         case LFUN_CHANGE_NEXT:
1073         case LFUN_CHANGE_PREVIOUS:
1074         case LFUN_ALL_CHANGES_ACCEPT:
1075         case LFUN_ALL_CHANGES_REJECT:
1076                 // TODO: context-sensitive enabling of LFUNs
1077                 // In principle, these command should only be enabled if there
1078                 // is a change in the document. However, without proper
1079                 // optimizations, this will inevitably result in poor performance.
1080                 flag.setEnabled(true);
1081                 break;
1082
1083         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
1084                 flag.setOnOff(buffer_.params().compressed);
1085                 break;
1086         }
1087
1088         case LFUN_SCREEN_UP:
1089         case LFUN_SCREEN_DOWN:
1090         case LFUN_SCROLL:
1091         case LFUN_SCREEN_UP_SELECT:
1092         case LFUN_SCREEN_DOWN_SELECT:
1093         case LFUN_INSET_FORALL:
1094                 flag.setEnabled(true);
1095                 break;
1096
1097         case LFUN_LAYOUT_TABULAR:
1098                 flag.setEnabled(cur.innerInsetOfType(TABULAR_CODE));
1099                 break;
1100
1101         case LFUN_LAYOUT:
1102                 flag.setEnabled(!cur.inset().forcePlainLayout(cur.idx()));
1103                 break;
1104
1105         case LFUN_LAYOUT_PARAGRAPH:
1106                 flag.setEnabled(cur.inset().allowParagraphCustomization(cur.idx()));
1107                 break;
1108
1109         case LFUN_DIALOG_SHOW_NEW_INSET:
1110                 // FIXME: this is wrong, but I do not understand the
1111                 // intent (JMarc)
1112                 if (cur.inset().lyxCode() == CAPTION_CODE)
1113                         return cur.inset().getStatus(cur, cmd, flag);
1114                 // FIXME we should consider passthru paragraphs too.
1115                 flag.setEnabled(!cur.inset().getLayout().isPassThru());
1116                 break;
1117
1118         case LFUN_CITATION_INSERT: {
1119                 FuncRequest fr(LFUN_INSET_INSERT, "citation");
1120                 // FIXME: This could turn in a recursive hell.
1121                 // Shouldn't we use Buffer::getStatus() instead?
1122                 flag.setEnabled(lyx::getStatus(fr).enabled());
1123                 break;
1124         }
1125         case LFUN_INSET_APPLY: {
1126                 string const name = cmd.getArg(0);
1127                 Inset * inset = editedInset(name);
1128                 if (inset) {
1129                         FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1130                         FuncStatus fs;
1131                         if (!inset->getStatus(cur, fr, fs)) {
1132                                 // Every inset is supposed to handle this
1133                                 LASSERT(false, break);
1134                         }
1135                         flag |= fs;
1136                 } else {
1137                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1138                         flag |= lyx::getStatus(fr);
1139                 }
1140                 break;
1141         }
1142
1143         default:
1144                 flag.setEnabled(false);
1145                 return false;
1146         }
1147
1148         return true;
1149 }
1150
1151
1152 Inset * BufferView::editedInset(string const & name) const
1153 {
1154         map<string, Inset *>::const_iterator it = d->edited_insets_.find(name);
1155         return it == d->edited_insets_.end() ? 0 : it->second;
1156 }
1157
1158
1159 void BufferView::editInset(string const & name, Inset * inset)
1160 {
1161         d->edited_insets_[name] = inset;
1162 }
1163
1164
1165 bool BufferView::dispatch(FuncRequest const & cmd)
1166 {
1167         //lyxerr << [ cmd = " << cmd << "]" << endl;
1168
1169         // Make sure that the cached BufferView is correct.
1170         LYXERR(Debug::ACTION, " action[" << cmd.action << ']'
1171                 << " arg[" << to_utf8(cmd.argument()) << ']'
1172                 << " x[" << cmd.x << ']'
1173                 << " y[" << cmd.y << ']'
1174                 << " button[" << cmd.button() << ']');
1175
1176         string const argument = to_utf8(cmd.argument());
1177         Cursor & cur = d->cursor_;
1178
1179         // Don't dispatch function that does not apply to internal buffers.
1180         if (buffer_.isInternal()
1181             && lyxaction.funcHasFlag(cmd.action, LyXAction::NoInternal))
1182                 return false;
1183
1184         // We'll set this back to false if need be.
1185         bool dispatched = true;
1186         buffer_.undo().beginUndoGroup();
1187
1188         switch (cmd.action) {
1189
1190         case LFUN_BUFFER_PARAMS_APPLY: {
1191                 DocumentClass const * const oldClass = buffer_.params().documentClassPtr();
1192                 cur.recordUndoFullDocument();
1193                 istringstream ss(to_utf8(cmd.argument()));
1194                 Lexer lex;
1195                 lex.setStream(ss);
1196                 int const unknown_tokens = buffer_.readHeader(lex);
1197                 if (unknown_tokens != 0) {
1198                         LYXERR0("Warning in LFUN_BUFFER_PARAMS_APPLY!\n"
1199                                                 << unknown_tokens << " unknown token"
1200                                                 << (unknown_tokens == 1 ? "" : "s"));
1201                 }
1202                 updateLayout(oldClass);
1203
1204                 // We are most certainly here because of a change in the document
1205                 // It is then better to make sure that all dialogs are in sync with
1206                 // current document settings.
1207                 processUpdateFlags(Update::Force | Update::FitCursor);
1208                 break;
1209         }
1210
1211         case LFUN_LAYOUT_MODULES_CLEAR: {
1212                 DocumentClass const * const oldClass =
1213                         buffer_.params().documentClassPtr();
1214                 cur.recordUndoFullDocument();
1215                 buffer_.params().clearLayoutModules();
1216                 buffer_.params().makeDocumentClass();
1217                 updateLayout(oldClass);
1218                 processUpdateFlags(Update::Force | Update::FitCursor);
1219                 break;
1220         }
1221
1222         case LFUN_LAYOUT_MODULE_ADD: {
1223                 BufferParams const & params = buffer_.params();
1224                 if (!params.moduleCanBeAdded(argument)) {
1225                         LYXERR0("Module `" << argument <<
1226                                 "' cannot be added due to failed requirements or "
1227                                 "conflicts with installed modules.");
1228                         break;
1229                 }
1230                 DocumentClass const * const oldClass = params.documentClassPtr();
1231                 cur.recordUndoFullDocument();
1232                 buffer_.params().addLayoutModule(argument);
1233                 buffer_.params().makeDocumentClass();
1234                 updateLayout(oldClass);
1235                 processUpdateFlags(Update::Force | Update::FitCursor);
1236                 break;
1237         }
1238
1239         case LFUN_TEXTCLASS_APPLY: {
1240                 if (!LayoutFileList::get().load(argument, buffer_.temppath()) &&
1241                         !LayoutFileList::get().load(argument, buffer_.filePath()))
1242                         break;
1243
1244                 LayoutFile const * old_layout = buffer_.params().baseClass();
1245                 LayoutFile const * new_layout = &(LayoutFileList::get()[argument]);
1246
1247                 if (old_layout == new_layout)
1248                         // nothing to do
1249                         break;
1250
1251                 //Save the old, possibly modular, layout for use in conversion.
1252                 DocumentClass const * const oldDocClass =
1253                         buffer_.params().documentClassPtr();
1254                 cur.recordUndoFullDocument();
1255                 buffer_.params().setBaseClass(argument);
1256                 buffer_.params().makeDocumentClass();
1257                 updateLayout(oldDocClass);
1258                 processUpdateFlags(Update::Force | Update::FitCursor);
1259                 break;
1260         }
1261
1262         case LFUN_TEXTCLASS_LOAD:
1263                 LayoutFileList::get().load(argument, buffer_.temppath()) ||
1264                 LayoutFileList::get().load(argument, buffer_.filePath());
1265                 break;
1266
1267         case LFUN_LAYOUT_RELOAD: {
1268                 DocumentClass const * const oldClass = buffer_.params().documentClassPtr();
1269                 LayoutFileIndex bc = buffer_.params().baseClassID();
1270                 LayoutFileList::get().reset(bc);
1271                 buffer_.params().setBaseClass(bc);
1272                 buffer_.params().makeDocumentClass();
1273                 updateLayout(oldClass);
1274                 processUpdateFlags(Update::Force | Update::FitCursor);
1275                 break;
1276         }
1277
1278         case LFUN_UNDO:
1279                 cur.message(_("Undo"));
1280                 cur.clearSelection();
1281                 if (!cur.textUndo())
1282                         cur.message(_("No further undo information"));
1283                 else
1284                         processUpdateFlags(Update::Force | Update::FitCursor);
1285                 break;
1286
1287         case LFUN_REDO:
1288                 cur.message(_("Redo"));
1289                 cur.clearSelection();
1290                 if (!cur.textRedo())
1291                         cur.message(_("No further redo information"));
1292                 else
1293                         processUpdateFlags(Update::Force | Update::FitCursor);
1294                 break;
1295
1296         case LFUN_FONT_STATE:
1297                 cur.message(cur.currentState());
1298                 break;
1299
1300         case LFUN_BOOKMARK_SAVE:
1301                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1302                 break;
1303
1304         case LFUN_LABEL_GOTO: {
1305                 docstring label = cmd.argument();
1306                 if (label.empty()) {
1307                         InsetRef * inset =
1308                                 getInsetByCode<InsetRef>(cur, REF_CODE);
1309                         if (inset) {
1310                                 label = inset->getParam("reference");
1311                                 // persistent=false: use temp_bookmark
1312                                 saveBookmark(0);
1313                         }
1314                 }
1315                 if (!label.empty())
1316                         gotoLabel(label);
1317                 break;
1318         }
1319
1320         case LFUN_INSET_EDIT: {
1321                 FuncRequest fr(cmd);
1322                 // if there is an inset at cursor, see whether it
1323                 // can be modified.
1324                 Inset * inset = cur.nextInset();
1325                 if (inset)
1326                         inset->dispatch(cur, fr);
1327                 // if it did not work, try the underlying inset.
1328                 if (!inset || !cur.result().dispatched())
1329                         cur.dispatch(cmd);
1330
1331                 // FIXME I'm adding the last break to solve a crash,
1332                 // but that is obviously not right.
1333                 if (!cur.result().dispatched())
1334                         // It did not work too; no action needed.
1335                         break;
1336                 break;
1337         }
1338
1339         case LFUN_PARAGRAPH_GOTO: {
1340                 int const id = convert<int>(cmd.getArg(0));
1341                 int const pos = convert<int>(cmd.getArg(1));
1342                 int i = 0;
1343                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1344                         b = theBufferList().next(b)) {
1345
1346                         DocIterator dit = b->getParFromID(id);
1347                         if (dit.atEnd()) {
1348                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1349                                 ++i;
1350                                 continue;
1351                         }
1352                         LYXERR(Debug::INFO, "Paragraph " << dit.paragraph().id()
1353                                 << " found in buffer `"
1354                                 << b->absFileName() << "'.");
1355
1356                         if (b == &buffer_) {
1357                                 // Set the cursor
1358                                 dit.pos() = pos;
1359                                 setCursor(dit);
1360                                 processUpdateFlags(Update::Force | Update::FitCursor);
1361                         } else {
1362                                 // Switch to other buffer view and resend cmd
1363                                 theLyXFunc().dispatch(FuncRequest(
1364                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1365                                 theLyXFunc().dispatch(cmd);
1366                         }
1367                         break;
1368                 }
1369                 break;
1370         }
1371
1372         case LFUN_NOTE_NEXT:
1373                 gotoInset(this, NOTE_CODE, false);
1374                 break;
1375
1376         case LFUN_REFERENCE_NEXT: {
1377                 vector<InsetCode> tmp;
1378                 tmp.push_back(LABEL_CODE);
1379                 tmp.push_back(REF_CODE);
1380                 gotoInset(this, tmp, true);
1381                 break;
1382         }
1383
1384         case LFUN_CHANGES_TRACK:
1385                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
1386                 break;
1387
1388         case LFUN_CHANGES_OUTPUT:
1389                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
1390                 if (buffer_.params().outputChanges) {
1391                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
1392                         bool xcolorulem = LaTeXFeatures::isAvailable("ulem") &&
1393                                           LaTeXFeatures::isAvailable("xcolor");
1394
1395                         if (!dvipost && !xcolorulem) {
1396                                 Alert::warning(_("Changes not shown in LaTeX output"),
1397                                                _("Changes will not be highlighted in LaTeX output, "
1398                                                  "because neither dvipost nor xcolor/ulem are installed.\n"
1399                                                  "Please install these packages or redefine "
1400                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1401                         } else if (!xcolorulem) {
1402                                 Alert::warning(_("Changes not shown in LaTeX output"),
1403                                                _("Changes will not be highlighted in LaTeX output "
1404                                                  "when using pdflatex, because xcolor and ulem are not installed.\n"
1405                                                  "Please install both packages or redefine "
1406                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1407                         }
1408                 }
1409                 break;
1410
1411         case LFUN_CHANGE_NEXT:
1412                 findNextChange(this);
1413                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1414                 processUpdateFlags(Update::Force | Update::FitCursor);
1415                 break;
1416
1417         case LFUN_CHANGE_PREVIOUS:
1418                 findPreviousChange(this);
1419                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1420                 processUpdateFlags(Update::Force | Update::FitCursor);
1421                 break;
1422
1423         case LFUN_CHANGES_MERGE:
1424                 if (findNextChange(this) || findPreviousChange(this)) {
1425                         processUpdateFlags(Update::Force | Update::FitCursor);
1426                         showDialog("changes");
1427                 }
1428                 break;
1429
1430         case LFUN_ALL_CHANGES_ACCEPT:
1431                 // select complete document
1432                 cur.reset();
1433                 cur.selHandle(true);
1434                 buffer_.text().cursorBottom(cur);
1435                 // accept everything in a single step to support atomic undo
1436                 buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
1437                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1438                 processUpdateFlags(Update::Force | Update::FitCursor);
1439                 break;
1440
1441         case LFUN_ALL_CHANGES_REJECT:
1442                 // select complete document
1443                 cur.reset();
1444                 cur.selHandle(true);
1445                 buffer_.text().cursorBottom(cur);
1446                 // reject everything in a single step to support atomic undo
1447                 // Note: reject does not work recursively; the user may have to repeat the operation
1448                 buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
1449                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1450                 processUpdateFlags(Update::Force | Update::FitCursor);
1451                 break;
1452
1453         case LFUN_WORD_FIND_FORWARD:
1454         case LFUN_WORD_FIND_BACKWARD: {
1455                 static docstring last_search;
1456                 docstring searched_string;
1457
1458                 if (!cmd.argument().empty()) {
1459                         last_search = cmd.argument();
1460                         searched_string = cmd.argument();
1461                 } else {
1462                         searched_string = last_search;
1463                 }
1464
1465                 if (searched_string.empty())
1466                         break;
1467
1468                 bool const fw = cmd.action == LFUN_WORD_FIND_FORWARD;
1469                 docstring const data =
1470                         find2string(searched_string, true, false, fw);
1471                 find(this, FuncRequest(LFUN_WORD_FIND, data));
1472                 break;
1473         }
1474
1475         case LFUN_WORD_FIND: {
1476                 FuncRequest req = cmd;
1477                 if (cmd.argument().empty() && !d->search_request_cache_.argument().empty())
1478                         req = d->search_request_cache_;
1479                 if (req.argument().empty()) {
1480                         theLyXFunc().dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
1481                         break;
1482                 }
1483                 if (find(this, req))
1484                         showCursor();
1485                 else
1486                         message(_("String not found!"));
1487                 d->search_request_cache_ = req;
1488                 break;
1489         }
1490
1491         case LFUN_WORD_REPLACE: {
1492                 bool has_deleted = false;
1493                 if (cur.selection()) {
1494                         DocIterator beg = cur.selectionBegin();
1495                         DocIterator end = cur.selectionEnd();
1496                         if (beg.pit() == end.pit()) {
1497                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1498                                         if (cur.paragraph().isDeleted(p))
1499                                                 has_deleted = true;
1500                                 }
1501                         }
1502                 }
1503                 replace(this, cmd, has_deleted);
1504                 break;
1505         }
1506
1507         case LFUN_WORD_FINDADV: {
1508                 FindAndReplaceOptions opt;
1509                 istringstream iss(to_utf8(cmd.argument()));
1510                 iss >> opt;
1511                 if (findAdv(this, opt))
1512                         cur.dispatched();
1513                 else
1514                         cur.undispatched();
1515                 break;
1516         }
1517
1518         case LFUN_MARK_OFF:
1519                 cur.clearSelection();
1520                 cur.message(from_utf8(N_("Mark off")));
1521                 break;
1522
1523         case LFUN_MARK_ON:
1524                 cur.clearSelection();
1525                 cur.setMark(true);
1526                 cur.message(from_utf8(N_("Mark on")));
1527                 break;
1528
1529         case LFUN_MARK_TOGGLE:
1530                 cur.setSelection(false);
1531                 if (cur.mark()) {
1532                         cur.setMark(false);
1533                         cur.message(from_utf8(N_("Mark removed")));
1534                 } else {
1535                         cur.setMark(true);
1536                         cur.message(from_utf8(N_("Mark set")));
1537                 }
1538                 cur.resetAnchor();
1539                 break;
1540
1541         case LFUN_SCREEN_SHOW_CURSOR:
1542                 showCursor();
1543                 break;
1544
1545         case LFUN_SCREEN_RECENTER:
1546                 recenter();
1547                 break;
1548
1549         case LFUN_BIBTEX_DATABASE_ADD: {
1550                 Cursor tmpcur = cur;
1551                 findInset(tmpcur, BIBTEX_CODE, false);
1552                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1553                                                 BIBTEX_CODE);
1554                 if (inset) {
1555                         if (inset->addDatabase(cmd.argument()))
1556                                 buffer_.updateBibfilesCache();
1557                 }
1558                 break;
1559         }
1560
1561         case LFUN_BIBTEX_DATABASE_DEL: {
1562                 Cursor tmpcur = cur;
1563                 findInset(tmpcur, BIBTEX_CODE, false);
1564                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1565                                                 BIBTEX_CODE);
1566                 if (inset) {
1567                         if (inset->delDatabase(cmd.argument()))
1568                                 buffer_.updateBibfilesCache();
1569                 }
1570                 break;
1571         }
1572
1573         case LFUN_STATISTICS: {
1574                 DocIterator from, to;
1575                 if (cur.selection()) {
1576                         from = cur.selectionBegin();
1577                         to = cur.selectionEnd();
1578                 } else {
1579                         from = doc_iterator_begin(&buffer_);
1580                         to = doc_iterator_end(&buffer_);
1581                 }
1582                 int const words = countWords(from, to);
1583                 int const chars = countChars(from, to, false);
1584                 int const chars_blanks = countChars(from, to, true);
1585                 docstring message;
1586                 if (cur.selection())
1587                         message = _("Statistics for the selection:");
1588                 else
1589                         message = _("Statistics for the document:");
1590                 message += "\n\n";
1591                 if (words != 1)
1592                         message += bformat(_("%1$d words"), words);
1593                 else
1594                         message += _("One word");
1595                 message += "\n";
1596                 if (chars_blanks != 1)
1597                         message += bformat(_("%1$d characters (including blanks)"),
1598                                           chars_blanks);
1599                 else
1600                         message += _("One character (including blanks)");
1601                 message += "\n";
1602                 if (chars != 1)
1603                         message += bformat(_("%1$d characters (excluding blanks)"),
1604                                           chars);
1605                 else
1606                         message += _("One character (excluding blanks)");
1607
1608                 Alert::information(_("Statistics"), message);
1609         }
1610                 break;
1611
1612         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1613                 // turn compression on/off
1614                 buffer_.params().compressed = !buffer_.params().compressed;
1615                 break;
1616
1617         case LFUN_LABEL_COPY_AS_REF: {
1618                 // if there is an inset at cursor, try to copy it
1619                 Inset * inset = &cur.inset();
1620                 if (!inset || !inset->asInsetMath())
1621                         inset = cur.nextInset();
1622                 if (inset) {
1623                         FuncRequest tmpcmd = cmd;
1624                         inset->dispatch(cur, tmpcmd);
1625                 }
1626                 if (!cur.result().dispatched())
1627                         // It did not work too; no action needed.
1628                         break;
1629                 cur.clearSelection();
1630                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1631                 break;
1632         }
1633
1634         case LFUN_NEXT_INSET_MODIFY: {
1635                 // create the the real function we want to invoke
1636                 FuncRequest tmpcmd = cmd;
1637                 tmpcmd.action = LFUN_INSET_MODIFY;
1638                 // if there is an inset at cursor, see whether it
1639                 // can be modified.
1640                 Inset * inset = cur.nextInset();
1641                 if (inset) {
1642                         cur.recordUndo();
1643                         inset->dispatch(cur, tmpcmd);
1644                 }
1645                 // if it did not work, try the underlying inset.
1646                 if (!inset || !cur.result().dispatched()) {
1647                         cur.recordUndo();
1648                         cur.dispatch(tmpcmd);
1649                 }
1650
1651                 if (!cur.result().dispatched())
1652                         // It did not work too; no action needed.
1653                         break;
1654                 cur.clearSelection();
1655                 processUpdateFlags(Update::Force | Update::FitCursor);
1656                 break;
1657         }
1658
1659         case LFUN_SCREEN_UP:
1660         case LFUN_SCREEN_DOWN: {
1661                 Point p = getPos(cur, cur.boundary());
1662                 // This code has been commented out to enable to scroll down a
1663                 // document, even if there are large insets in it (see bug #5465).
1664                 /*if (p.y_ < 0 || p.y_ > height_) {
1665                         // The cursor is off-screen so recenter before proceeding.
1666                         showCursor();
1667                         p = getPos(cur, cur.boundary());
1668                 }*/
1669                 int const scrolled = scroll(cmd.action == LFUN_SCREEN_UP
1670                         ? -height_ : height_);
1671                 if (cmd.action == LFUN_SCREEN_UP && scrolled > -height_)
1672                         p = Point(0, 0);
1673                 if (cmd.action == LFUN_SCREEN_DOWN && scrolled < height_)
1674                         p = Point(width_, height_);
1675                 Cursor old = cur;
1676                 bool const in_texted = cur.inTexted();
1677                 cur.reset();
1678                 updateMetrics();
1679                 buffer_.changed();
1680                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
1681                         true, cmd.action == LFUN_SCREEN_UP);
1682                 //FIXME: what to do with cur.x_target()?
1683                 bool update = in_texted && cur.bv().checkDepm(cur, old);
1684                 cur.finishUndo();
1685                 if (update)
1686                         processUpdateFlags(Update::Force | Update::FitCursor);
1687                 break;
1688         }
1689
1690         case LFUN_SCROLL:
1691                 lfunScroll(cmd);
1692                 break;
1693
1694         case LFUN_SCREEN_UP_SELECT: {
1695                 cur.selHandle(true);
1696                 if (isTopScreen()) {
1697                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1698                         cur.finishUndo();
1699                         break;
1700                 }
1701                 int y = getPos(cur, cur.boundary()).y_;
1702                 int const ymin = y - height_ + defaultRowHeight();
1703                 while (y > ymin && cur.up())
1704                         y = getPos(cur, cur.boundary()).y_;
1705
1706                 cur.finishUndo();
1707                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1708                 break;
1709         }
1710
1711         case LFUN_SCREEN_DOWN_SELECT: {
1712                 cur.selHandle(true);
1713                 if (isBottomScreen()) {
1714                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1715                         cur.finishUndo();
1716                         break;
1717                 }
1718                 int y = getPos(cur, cur.boundary()).y_;
1719                 int const ymax = y + height_ - defaultRowHeight();
1720                 while (y < ymax && cur.down())
1721                         y = getPos(cur, cur.boundary()).y_;
1722
1723                 cur.finishUndo();
1724                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1725                 break;
1726         }
1727
1728         // This could be rewriten using some command like forall <insetname> <command>
1729         // once the insets refactoring is done.
1730         case LFUN_NOTES_MUTATE: {
1731                 if (cmd.argument().empty())
1732                         break;
1733
1734                 if (mutateNotes(cur, cmd.getArg(0), cmd.getArg(1))) {
1735                         processUpdateFlags(Update::Force);
1736                 }
1737                 break;
1738         }
1739
1740
1741         // This would be in Buffer class if only Cursor did not
1742         // require a bufferview
1743         case LFUN_INSET_FORALL: {
1744                 docstring const name = from_utf8(cmd.getArg(0));
1745                 string const commandstr = cmd.getLongArg(1);
1746                 FuncRequest const fr = lyxaction.lookupFunc(commandstr);
1747
1748                 // an arbitrary number to limit number of iterations
1749                 const int max_iter = 1000;
1750                 int iterations = 0;
1751                 Cursor & cur = d->cursor_;
1752                 cur.reset();
1753                 if (!cur.nextInset())
1754                         cur.forwardInset();
1755                 cur.beginUndoGroup();
1756                 while(cur && iterations < max_iter) {
1757                         Inset * ins = cur.nextInset();
1758                         if (!ins)
1759                                 break;
1760                         docstring insname = ins->name();
1761                         while (!insname.empty()) {
1762                                 if (insname == name || name == from_utf8("*")) {
1763                                         cur.recordUndo();
1764                                         lyx::dispatch(fr);
1765                                         ++iterations;
1766                                         break;
1767                                 }
1768                                 size_t const i = insname.rfind(':');
1769                                 if (i == string::npos)
1770                                         break;
1771                                 insname = insname.substr(0, i);
1772                         }
1773                         cur.forwardInset();
1774                 }
1775                 cur.endUndoGroup();
1776                 cur.reset();
1777                 processUpdateFlags(Update::Force);
1778
1779                 if (iterations >= max_iter)
1780                         cur.errorMessage(bformat(_("`inset-forall' interrupted because number of actions is larger than %1$d"), max_iter));
1781                 else
1782                         cur.message(bformat(_("Applied \"%1$s\" to %2$d insets"), from_utf8(commandstr), iterations));
1783                 break;
1784         }
1785
1786
1787         case LFUN_ALL_INSETS_TOGGLE: {
1788                 string action;
1789                 string const name = split(to_utf8(cmd.argument()), action, ' ');
1790                 InsetCode const inset_code = insetCode(name);
1791
1792                 FuncRequest fr(LFUN_INSET_TOGGLE, action);
1793
1794                 Inset & inset = cur.buffer()->inset();
1795                 InsetIterator it  = inset_iterator_begin(inset);
1796                 InsetIterator const end = inset_iterator_end(inset);
1797                 for (; it != end; ++it) {
1798                         if (it->asInsetCollapsable()
1799                             && (inset_code == NO_CODE
1800                             || inset_code == it->lyxCode())) {
1801                                 Cursor tmpcur = cur;
1802                                 tmpcur.pushBackward(*it);
1803                                 it->dispatch(tmpcur, fr);
1804                         }
1805                 }
1806                 processUpdateFlags(Update::Force | Update::FitCursor);
1807                 break;
1808         }
1809
1810         case LFUN_BRANCH_ADD_INSERT: {
1811                 docstring branch_name = from_utf8(cmd.getArg(0));
1812                 if (branch_name.empty())
1813                         if (!Alert::askForText(branch_name, _("Branch name")) ||
1814                                                 branch_name.empty())
1815                                 break;
1816
1817                 DispatchResult drtmp;
1818                 buffer_.dispatch(FuncRequest(LFUN_BRANCH_ADD, branch_name), drtmp);
1819                 if (drtmp.error()) {
1820                         Alert::warning(_("Branch already exists"), drtmp.message());
1821                         break;
1822                 }
1823                 lyx::dispatch(FuncRequest(LFUN_BRANCH_INSERT, branch_name));
1824                 break;
1825         }
1826
1827         case LFUN_KEYMAP_OFF:
1828                 getIntl().keyMapOn(false);
1829                 break;
1830
1831         case LFUN_KEYMAP_PRIMARY:
1832                 getIntl().keyMapPrim();
1833                 break;
1834
1835         case LFUN_KEYMAP_SECONDARY:
1836                 getIntl().keyMapSec();
1837                 break;
1838
1839         case LFUN_KEYMAP_TOGGLE:
1840                 getIntl().toggleKeyMap();
1841                 break;
1842
1843         case LFUN_DIALOG_SHOW_NEW_INSET: {
1844                 string const name = cmd.getArg(0);
1845                 string data = trim(to_utf8(cmd.argument()).substr(name.size()));
1846                 if (decodeInsetParam(name, data, buffer_))
1847                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, name + " " + data));
1848                 else
1849                         lyxerr << "Inset type '" << name <<
1850                         "' not recognized in LFUN_DIALOG_SHOW_NEW_INSET" <<  endl;
1851                 break;
1852         }
1853
1854         case LFUN_CITATION_INSERT: {
1855                 if (argument.empty()) {
1856                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW_NEW_INSET, "citation"));
1857                         break;
1858                 }
1859                 // we can have one optional argument, delimited by '|'
1860                 // citation-insert <key>|<text_before>
1861                 // this should be enhanced to also support text_after
1862                 // and citation style
1863                 string arg = argument;
1864                 string opt1;
1865                 if (contains(argument, "|")) {
1866                         arg = token(argument, '|', 0);
1867                         opt1 = token(argument, '|', 1);
1868                 }
1869                 InsetCommandParams icp(CITE_CODE);
1870                 icp["key"] = from_utf8(arg);
1871                 if (!opt1.empty())
1872                         icp["before"] = from_utf8(opt1);
1873                 string icstr = InsetCommand::params2string("citation", icp);
1874                 FuncRequest fr(LFUN_INSET_INSERT, icstr);
1875                 lyx::dispatch(fr);
1876                 break;
1877         }
1878
1879         case LFUN_INSET_APPLY: {
1880                 string const name = cmd.getArg(0);
1881                 Inset * inset = editedInset(name);
1882                 if (!inset) {
1883                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1884                         lyx::dispatch(fr);
1885                         break;
1886                 }
1887                 // put cursor in front of inset.
1888                 if (!setCursorFromInset(inset)) {
1889                         LASSERT(false, break);
1890                 }
1891                 cur.recordUndo();
1892                 FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1893                 inset->dispatch(cur, fr);
1894                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1895                 break;
1896         }
1897
1898         default:
1899                 dispatched = false;
1900                 break;
1901         }
1902
1903         buffer_.undo().endUndoGroup();
1904         return dispatched;
1905 }
1906
1907
1908 docstring const BufferView::requestSelection()
1909 {
1910         Cursor & cur = d->cursor_;
1911
1912         LYXERR(Debug::SELECTION, "requestSelection: cur.selection: " << cur.selection());
1913         if (!cur.selection()) {
1914                 d->xsel_cache_.set = false;
1915                 return docstring();
1916         }
1917
1918         LYXERR(Debug::SELECTION, "requestSelection: xsel_cache.set: " << d->xsel_cache_.set);
1919         if (!d->xsel_cache_.set ||
1920             cur.top() != d->xsel_cache_.cursor ||
1921             cur.anchor_.top() != d->xsel_cache_.anchor)
1922         {
1923                 d->xsel_cache_.cursor = cur.top();
1924                 d->xsel_cache_.anchor = cur.anchor_.top();
1925                 d->xsel_cache_.set = cur.selection();
1926                 return cur.selectionAsString(false);
1927         }
1928         return docstring();
1929 }
1930
1931
1932 void BufferView::clearSelection()
1933 {
1934         d->cursor_.clearSelection();
1935         // Clear the selection buffer. Otherwise a subsequent
1936         // middle-mouse-button paste would use the selection buffer,
1937         // not the more current external selection.
1938         cap::clearSelection();
1939         d->xsel_cache_.set = false;
1940         // The buffer did not really change, but this causes the
1941         // redraw we need because we cleared the selection above.
1942         buffer_.changed();
1943 }
1944
1945
1946 void BufferView::resize(int width, int height)
1947 {
1948         // Update from work area
1949         width_ = width;
1950         height_ = height;
1951
1952         // Clear the paragraph height cache.
1953         d->par_height_.clear();
1954         // Redo the metrics.
1955         updateMetrics();
1956 }
1957
1958
1959 Inset const * BufferView::getCoveringInset(Text const & text,
1960                 int x, int y) const
1961 {
1962         TextMetrics & tm = d->text_metrics_[&text];
1963         Inset * inset = tm.checkInsetHit(x, y);
1964         if (!inset)
1965                 return 0;
1966
1967         if (!inset->descendable(*this))
1968                 // No need to go further down if the inset is not
1969                 // descendable.
1970                 return inset;
1971
1972         size_t cell_number = inset->nargs();
1973         // Check all the inner cell.
1974         for (size_t i = 0; i != cell_number; ++i) {
1975                 Text const * inner_text = inset->getText(i);
1976                 if (inner_text) {
1977                         // Try deeper.
1978                         Inset const * inset_deeper =
1979                                 getCoveringInset(*inner_text, x, y);
1980                         if (inset_deeper)
1981                                 return inset_deeper;
1982                 }
1983         }
1984
1985         return inset;
1986 }
1987
1988
1989 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
1990 {
1991         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
1992
1993         // This is only called for mouse related events including
1994         // LFUN_FILE_OPEN generated by drag-and-drop.
1995         FuncRequest cmd = cmd0;
1996
1997         Cursor old = cursor();
1998         Cursor cur(*this);
1999         cur.push(buffer_.inset());
2000         cur.setSelection(d->cursor_.selection());
2001
2002         // Either the inset under the cursor or the
2003         // surrounding Text will handle this event.
2004
2005         // make sure we stay within the screen...
2006         cmd.y = min(max(cmd.y, -1), height_);
2007
2008         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
2009
2010                 // Get inset under mouse, if there is one.
2011                 Inset const * covering_inset =
2012                         getCoveringInset(buffer_.text(), cmd.x, cmd.y);
2013                 if (covering_inset == d->last_inset_)
2014                         // Same inset, no need to do anything...
2015                         return;
2016
2017                 bool need_redraw = false;
2018                 // const_cast because of setMouseHover().
2019                 Inset * inset = const_cast<Inset *>(covering_inset);
2020                 if (d->last_inset_)
2021                         // Remove the hint on the last hovered inset (if any).
2022                         need_redraw |= d->last_inset_->setMouseHover(false);
2023                 if (inset)
2024                         // Highlighted the newly hovered inset (if any).
2025                         need_redraw |= inset->setMouseHover(true);
2026                 d->last_inset_ = inset;
2027                 if (!need_redraw)
2028                         return;
2029
2030                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
2031                         << cmd.x << ", " << cmd.y << ")");
2032
2033                 d->update_strategy_ = DecorationUpdate;
2034
2035                 // This event (moving without mouse click) is not passed further.
2036                 // This should be changed if it is further utilized.
2037                 buffer_.changed();
2038                 return;
2039         }
2040
2041         // Build temporary cursor.
2042         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x, cmd.y);
2043
2044         // Put anchor at the same position.
2045         cur.resetAnchor();
2046
2047         cur.beginUndoGroup();
2048
2049         // Try to dispatch to an non-editable inset near this position
2050         // via the temp cursor. If the inset wishes to change the real
2051         // cursor it has to do so explicitly by using
2052         //  cur.bv().cursor() = cur;  (or similar)
2053         if (inset)
2054                 inset->dispatch(cur, cmd);
2055
2056         // Now dispatch to the temporary cursor. If the real cursor should
2057         // be modified, the inset's dispatch has to do so explicitly.
2058         if (!inset || !cur.result().dispatched())
2059                 cur.dispatch(cmd);
2060
2061         cur.endUndoGroup();
2062
2063         // Notify left insets
2064         if (cur != old) {
2065                 old.fixIfBroken();
2066                 bool badcursor = notifyCursorLeavesOrEnters(old, cur);
2067                 if (badcursor)
2068                         cursor().fixIfBroken();
2069         }
2070
2071         // Do we have a selection?
2072         theSelection().haveSelection(cursor().selection());
2073
2074         // If the command has been dispatched,
2075         if (cur.result().dispatched() || cur.result().update())
2076                 processUpdateFlags(cur.result().update());
2077 }
2078
2079
2080 void BufferView::lfunScroll(FuncRequest const & cmd)
2081 {
2082         string const scroll_type = cmd.getArg(0);
2083         int const scroll_step =
2084                 (scroll_type == "line") ? d->scrollbarParameters_.single_step
2085                 : (scroll_type == "page") ? d->scrollbarParameters_.page_step : 0;
2086         if (scroll_step == 0)
2087                 return;
2088         string const scroll_quantity = cmd.getArg(1);
2089         if (scroll_quantity == "up")
2090                 scrollUp(scroll_step);
2091         else if (scroll_quantity == "down")
2092                 scrollDown(scroll_step);
2093         else {
2094                 int const scroll_value = convert<int>(scroll_quantity);
2095                 if (scroll_value)
2096                         scroll(scroll_step * scroll_value);
2097         }
2098         updateMetrics();
2099         buffer_.changed();
2100 }
2101
2102
2103 int BufferView::minVisiblePart()
2104 {
2105         return 2 * defaultRowHeight();
2106 }
2107
2108
2109 int BufferView::scroll(int y)
2110 {
2111         if (y > 0)
2112                 return scrollDown(y);
2113         if (y < 0)
2114                 return scrollUp(-y);
2115         return 0;
2116 }
2117
2118
2119 int BufferView::scrollDown(int offset)
2120 {
2121         Text * text = &buffer_.text();
2122         TextMetrics & tm = d->text_metrics_[text];
2123         int const ymax = height_ + offset;
2124         while (true) {
2125                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
2126                 int bottom_pos = last.second->position() + last.second->descent();
2127                 if (lyxrc.scroll_below_document)
2128                         bottom_pos += height_ - minVisiblePart();
2129                 if (last.first + 1 == int(text->paragraphs().size())) {
2130                         if (bottom_pos <= height_)
2131                                 return 0;
2132                         offset = min(offset, bottom_pos - height_);
2133                         break;
2134                 }
2135                 if (bottom_pos > ymax)
2136                         break;
2137                 tm.newParMetricsDown();
2138         }
2139         d->anchor_ypos_ -= offset;
2140         return -offset;
2141 }
2142
2143
2144 int BufferView::scrollUp(int offset)
2145 {
2146         Text * text = &buffer_.text();
2147         TextMetrics & tm = d->text_metrics_[text];
2148         int ymin = - offset;
2149         while (true) {
2150                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
2151                 int top_pos = first.second->position() - first.second->ascent();
2152                 if (first.first == 0) {
2153                         if (top_pos >= 0)
2154                                 return 0;
2155                         offset = min(offset, - top_pos);
2156                         break;
2157                 }
2158                 if (top_pos < ymin)
2159                         break;
2160                 tm.newParMetricsUp();
2161         }
2162         d->anchor_ypos_ += offset;
2163         return offset;
2164 }
2165
2166
2167 void BufferView::setCursorFromRow(int row)
2168 {
2169         int tmpid = -1;
2170         int tmppos = -1;
2171
2172         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
2173
2174         d->cursor_.reset();
2175         if (tmpid == -1)
2176                 buffer_.text().setCursor(d->cursor_, 0, 0);
2177         else
2178                 buffer_.text().setCursor(d->cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
2179         recenter();
2180 }
2181
2182
2183 bool BufferView::setCursorFromInset(Inset const * inset)
2184 {
2185         // are we already there?
2186         if (cursor().nextInset() == inset)
2187                 return true;
2188
2189         // Inset is not at cursor position. Find it in the document.
2190         Cursor cur(*this);
2191         cur.reset();
2192         while (cur && cur.nextInset() != inset)
2193                 cur.forwardInset();
2194
2195         if (cur) {
2196                 setCursor(cur);
2197                 return true;
2198         }
2199         return false;
2200 }
2201
2202
2203 void BufferView::gotoLabel(docstring const & label)
2204 {
2205         std::vector<Buffer const *> bufs = buffer().allRelatives();
2206         std::vector<Buffer const *>::iterator it = bufs.begin();
2207         for (; it != bufs.end(); ++it) {
2208                 Buffer const * buf = *it;
2209
2210                 // find label
2211                 Toc & toc = buf->tocBackend().toc("label");
2212                 TocIterator toc_it = toc.begin();
2213                 TocIterator end = toc.end();
2214                 for (; toc_it != end; ++toc_it) {
2215                         if (label == toc_it->str()) {
2216                                 dispatch(toc_it->action());
2217                                 return;
2218                         }
2219                 }
2220         }
2221 }
2222
2223
2224 TextMetrics const & BufferView::textMetrics(Text const * t) const
2225 {
2226         return const_cast<BufferView *>(this)->textMetrics(t);
2227 }
2228
2229
2230 TextMetrics & BufferView::textMetrics(Text const * t)
2231 {
2232         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
2233         if (tmc_it == d->text_metrics_.end()) {
2234                 tmc_it = d->text_metrics_.insert(
2235                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
2236         }
2237         return tmc_it->second;
2238 }
2239
2240
2241 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
2242                 pit_type pit) const
2243 {
2244         return textMetrics(t).parMetrics(pit);
2245 }
2246
2247
2248 int BufferView::workHeight() const
2249 {
2250         return height_;
2251 }
2252
2253
2254 void BufferView::setCursor(DocIterator const & dit)
2255 {
2256         d->cursor_.reset();
2257         size_t const n = dit.depth();
2258         for (size_t i = 0; i < n; ++i)
2259                 dit[i].inset().edit(d->cursor_, true);
2260
2261         d->cursor_.setCursor(dit);
2262         d->cursor_.setSelection(false);
2263 }
2264
2265
2266 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
2267 {
2268         // Would be wrong to delete anything if we have a selection.
2269         if (cur.selection())
2270                 return false;
2271
2272         bool need_anchor_change = false;
2273         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
2274                 need_anchor_change);
2275
2276         if (need_anchor_change)
2277                 cur.resetAnchor();
2278
2279         if (!changed)
2280                 return false;
2281
2282         d->cursor_ = cur;
2283
2284         buffer_.updateLabels();
2285
2286         updateMetrics();
2287         buffer_.changed();
2288         return true;
2289 }
2290
2291
2292 bool BufferView::mouseSetCursor(Cursor & cur, bool select)
2293 {
2294         LASSERT(&cur.bv() == this, /**/);
2295
2296         if (!select)
2297                 // this event will clear selection so we save selection for
2298                 // persistent selection
2299                 cap::saveSelection(cursor());
2300
2301         d->cursor_.macroModeClose();
2302
2303         // Has the cursor just left the inset?
2304         bool leftinset = (&d->cursor_.inset() != &cur.inset());
2305         if (leftinset)
2306                 d->cursor_.fixIfBroken();
2307
2308         // FIXME: shift-mouse selection doesn't work well across insets.
2309         bool do_selection = select && &d->cursor_.anchor().inset() == &cur.inset();
2310
2311         // do the dEPM magic if needed
2312         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
2313         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
2314         // the leftinset bool would not be necessary (badcursor instead).
2315         bool update = leftinset;
2316         if (!do_selection && d->cursor_.inTexted())
2317                 update |= checkDepm(cur, d->cursor_);
2318
2319         if (!do_selection)
2320                 d->cursor_.resetAnchor();
2321         d->cursor_.setCursor(cur);
2322         d->cursor_.boundary(cur.boundary());
2323         if (do_selection)
2324                 d->cursor_.setSelection();
2325         else
2326                 d->cursor_.clearSelection();
2327
2328         d->cursor_.finishUndo();
2329         d->cursor_.setCurrentFont();
2330         return update;
2331 }
2332
2333
2334 void BufferView::putSelectionAt(DocIterator const & cur,
2335                                 int length, bool backwards)
2336 {
2337         d->cursor_.clearSelection();
2338
2339         setCursor(cur);
2340
2341         if (length) {
2342                 if (backwards) {
2343                         d->cursor_.pos() += length;
2344                         d->cursor_.setSelection(d->cursor_, -length);
2345                 } else
2346                         d->cursor_.setSelection(d->cursor_, length);
2347         }
2348         // Ensure a redraw happens in any case because the new selection could
2349         // possibly be on the same screen as the previous selection.
2350         processUpdateFlags(Update::Force | Update::FitCursor);
2351 }
2352
2353
2354 Cursor & BufferView::cursor()
2355 {
2356         return d->cursor_;
2357 }
2358
2359
2360 Cursor const & BufferView::cursor() const
2361 {
2362         return d->cursor_;
2363 }
2364
2365
2366 pit_type BufferView::anchor_ref() const
2367 {
2368         return d->anchor_pit_;
2369 }
2370
2371
2372 bool BufferView::singleParUpdate()
2373 {
2374         Text & buftext = buffer_.text();
2375         pit_type const bottom_pit = d->cursor_.bottom().pit();
2376         TextMetrics & tm = textMetrics(&buftext);
2377         int old_height = tm.parMetrics(bottom_pit).height();
2378
2379         // make sure inline completion pointer is ok
2380         if (d->inlineCompletionPos_.fixIfBroken())
2381                 d->inlineCompletionPos_ = DocIterator();
2382
2383         // In Single Paragraph mode, rebreak only
2384         // the (main text, not inset!) paragraph containing the cursor.
2385         // (if this paragraph contains insets etc., rebreaking will
2386         // recursively descend)
2387         tm.redoParagraph(bottom_pit);
2388         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
2389         if (pm.height() != old_height)
2390                 // Paragraph height has changed so we cannot proceed to
2391                 // the singlePar optimisation.
2392                 return false;
2393
2394         d->update_strategy_ = SingleParUpdate;
2395
2396         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
2397                 << " y2: " << pm.position() + pm.descent()
2398                 << " pit: " << bottom_pit
2399                 << " singlepar: 1");
2400         return true;
2401 }
2402
2403
2404 void BufferView::updateMetrics()
2405 {
2406         if (height_ == 0 || width_ == 0)
2407                 return;
2408
2409         Text & buftext = buffer_.text();
2410         pit_type const npit = int(buftext.paragraphs().size());
2411
2412         // Clear out the position cache in case of full screen redraw,
2413         d->coord_cache_.clear();
2414
2415         // Clear out paragraph metrics to avoid having invalid metrics
2416         // in the cache from paragraphs not relayouted below
2417         // The complete text metrics will be redone.
2418         d->text_metrics_.clear();
2419
2420         TextMetrics & tm = textMetrics(&buftext);
2421
2422         // make sure inline completion pointer is ok
2423         if (d->inlineCompletionPos_.fixIfBroken())
2424                 d->inlineCompletionPos_ = DocIterator();
2425
2426         if (d->anchor_pit_ >= npit)
2427                 // The anchor pit must have been deleted...
2428                 d->anchor_pit_ = npit - 1;
2429
2430         // Rebreak anchor paragraph.
2431         tm.redoParagraph(d->anchor_pit_);
2432         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
2433
2434         // position anchor
2435         if (d->anchor_pit_ == 0) {
2436                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
2437
2438                 // Complete buffer visible? Then it's easy.
2439                 if (scrollRange == 0)
2440                         d->anchor_ypos_ = anchor_pm.ascent();
2441
2442                 // FIXME: Some clever handling needed to show
2443                 // the _first_ paragraph up to the top if the cursor is
2444                 // in the first line.
2445         }
2446         anchor_pm.setPosition(d->anchor_ypos_);
2447
2448         LYXERR(Debug::PAINTING, "metrics: "
2449                 << " anchor pit = " << d->anchor_pit_
2450                 << " anchor ypos = " << d->anchor_ypos_);
2451
2452         // Redo paragraphs above anchor if necessary.
2453         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
2454         // We are now just above the anchor paragraph.
2455         pit_type pit1 = d->anchor_pit_ - 1;
2456         for (; pit1 >= 0 && y1 >= 0; --pit1) {
2457                 tm.redoParagraph(pit1);
2458                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
2459                 y1 -= pm.descent();
2460                 // Save the paragraph position in the cache.
2461                 pm.setPosition(y1);
2462                 y1 -= pm.ascent();
2463         }
2464
2465         // Redo paragraphs below the anchor if necessary.
2466         int y2 = d->anchor_ypos_ + anchor_pm.descent();
2467         // We are now just below the anchor paragraph.
2468         pit_type pit2 = d->anchor_pit_ + 1;
2469         for (; pit2 < npit && y2 <= height_; ++pit2) {
2470                 tm.redoParagraph(pit2);
2471                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
2472                 y2 += pm.ascent();
2473                 // Save the paragraph position in the cache.
2474                 pm.setPosition(y2);
2475                 y2 += pm.descent();
2476         }
2477
2478         LYXERR(Debug::PAINTING, "Metrics: "
2479                 << " anchor pit = " << d->anchor_pit_
2480                 << " anchor ypos = " << d->anchor_ypos_
2481                 << " y1 = " << y1
2482                 << " y2 = " << y2
2483                 << " pit1 = " << pit1
2484                 << " pit2 = " << pit2);
2485
2486         d->update_strategy_ = FullScreenUpdate;
2487
2488         if (lyxerr.debugging(Debug::WORKAREA)) {
2489                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
2490                 d->coord_cache_.dump();
2491         }
2492 }
2493
2494
2495 void BufferView::insertLyXFile(FileName const & fname)
2496 {
2497         LASSERT(d->cursor_.inTexted(), /**/);
2498
2499         // Get absolute path of file and add ".lyx"
2500         // to the filename if necessary
2501         FileName filename = fileSearch(string(), fname.absFilename(), "lyx");
2502
2503         docstring const disp_fn = makeDisplayPath(filename.absFilename());
2504         // emit message signal.
2505         message(bformat(_("Inserting document %1$s..."), disp_fn));
2506
2507         docstring res;
2508         Buffer buf("", false);
2509         if (buf.loadLyXFile(filename)) {
2510                 ErrorList & el = buffer_.errorList("Parse");
2511                 // Copy the inserted document error list into the current buffer one.
2512                 el = buf.errorList("Parse");
2513                 buffer_.undo().recordUndo(d->cursor_);
2514                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
2515                                              buf.params().documentClassPtr(), el);
2516                 res = _("Document %1$s inserted.");
2517         } else {
2518                 res = _("Could not insert document %1$s");
2519         }
2520
2521         updateMetrics();
2522         buffer_.changed();
2523         // emit message signal.
2524         message(bformat(res, disp_fn));
2525         buffer_.errors("Parse");
2526 }
2527
2528
2529 Point BufferView::coordOffset(DocIterator const & dit, bool boundary) const
2530 {
2531         int x = 0;
2532         int y = 0;
2533         int lastw = 0;
2534
2535         // Addup contribution of nested insets, from inside to outside,
2536         // keeping the outer paragraph for a special handling below
2537         for (size_t i = dit.depth() - 1; i >= 1; --i) {
2538                 CursorSlice const & sl = dit[i];
2539                 int xx = 0;
2540                 int yy = 0;
2541
2542                 // get relative position inside sl.inset()
2543                 sl.inset().cursorPos(*this, sl, boundary && (i + 1 == dit.depth()), xx, yy);
2544
2545                 // Make relative position inside of the edited inset relative to sl.inset()
2546                 x += xx;
2547                 y += yy;
2548
2549                 // In case of an RTL inset, the edited inset will be positioned to the left
2550                 // of xx:yy
2551                 if (sl.text()) {
2552                         bool boundary_i = boundary && i + 1 == dit.depth();
2553                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
2554                         if (rtl)
2555                                 x -= lastw;
2556                 }
2557
2558                 // remember width for the case that sl.inset() is positioned in an RTL inset
2559                 if (i && dit[i - 1].text()) {
2560                         // If this Inset is inside a Text Inset, retrieve the Dimension
2561                         // from the containing text instead of using Inset::dimension() which
2562                         // might not be implemented.
2563                         // FIXME (Abdel 23/09/2007): this is a bit messy because of the
2564                         // elimination of Inset::dim_ cache. This coordOffset() method needs
2565                         // to be rewritten in light of the new design.
2566                         Dimension const & dim = parMetrics(dit[i - 1].text(),
2567                                 dit[i - 1].pit()).insetDimension(&sl.inset());
2568                         lastw = dim.wid;
2569                 } else {
2570                         Dimension const dim = sl.inset().dimension(*this);
2571                         lastw = dim.wid;
2572                 }
2573
2574                 //lyxerr << "Cursor::getPos, i: "
2575                 // << i << " x: " << xx << " y: " << y << endl;
2576         }
2577
2578         // Add contribution of initial rows of outermost paragraph
2579         CursorSlice const & sl = dit[0];
2580         TextMetrics const & tm = textMetrics(sl.text());
2581         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
2582         LASSERT(!pm.rows().empty(), /**/);
2583         y -= pm.rows()[0].ascent();
2584 #if 1
2585         // FIXME: document this mess
2586         size_t rend;
2587         if (sl.pos() > 0 && dit.depth() == 1) {
2588                 int pos = sl.pos();
2589                 if (pos && boundary)
2590                         --pos;
2591 //              lyxerr << "coordOffset: boundary:" << boundary << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
2592                 rend = pm.pos2row(pos);
2593         } else
2594                 rend = pm.pos2row(sl.pos());
2595 #else
2596         size_t rend = pm.pos2row(sl.pos());
2597 #endif
2598         for (size_t rit = 0; rit != rend; ++rit)
2599                 y += pm.rows()[rit].height();
2600         y += pm.rows()[rend].ascent();
2601
2602         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2603
2604         // Make relative position from the nested inset now bufferview absolute.
2605         int xx = bottom_tm.cursorX(dit.bottom(), boundary && dit.depth() == 1);
2606         x += xx;
2607
2608         // In the RTL case place the nested inset at the left of the cursor in
2609         // the outer paragraph
2610         bool boundary_1 = boundary && 1 == dit.depth();
2611         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2612         if (rtl)
2613                 x -= lastw;
2614
2615         return Point(x, y);
2616 }
2617
2618
2619 Point BufferView::getPos(DocIterator const & dit, bool boundary) const
2620 {
2621         if (!paragraphVisible(dit))
2622                 return Point(-1, -1);
2623
2624         CursorSlice const & bot = dit.bottom();
2625         TextMetrics const & tm = textMetrics(bot.text());
2626
2627         Point p = coordOffset(dit, boundary); // offset from outer paragraph
2628         p.y_ += tm.parMetrics(bot.pit()).position();
2629         return p;
2630 }
2631
2632
2633 bool BufferView::paragraphVisible(DocIterator const & dit) const
2634 {
2635         CursorSlice const & bot = dit.bottom();
2636         TextMetrics const & tm = textMetrics(bot.text());
2637
2638         return tm.contains(bot.pit());
2639 }
2640
2641
2642 void BufferView::cursorPosAndHeight(Point & p, int & h) const
2643 {
2644         Cursor const & cur = cursor();
2645         Font const font = cur.getFont();
2646         frontend::FontMetrics const & fm = theFontMetrics(font);
2647         int const asc = fm.maxAscent();
2648         int const des = fm.maxDescent();
2649         h = asc + des;
2650         p = getPos(cur, cur.boundary());
2651         p.y_ -= asc;
2652 }
2653
2654
2655 bool BufferView::cursorInView(Point const & p, int h) const
2656 {
2657         Cursor const & cur = cursor();
2658         // does the cursor touch the screen ?
2659         if (p.y_ + h < 0 || p.y_ >= workHeight() || !paragraphVisible(cur))
2660                 return false;
2661         return true;
2662 }
2663
2664
2665 void BufferView::draw(frontend::Painter & pain)
2666 {
2667         if (height_ == 0 || width_ == 0)
2668                 return;
2669         LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
2670
2671         Text & text = buffer_.text();
2672         TextMetrics const & tm = d->text_metrics_[&text];
2673         int const y = tm.first().second->position();
2674         PainterInfo pi(this, pain);
2675
2676         switch (d->update_strategy_) {
2677
2678         case NoScreenUpdate:
2679                 // If no screen painting is actually needed, only some the different
2680                 // coordinates of insets and paragraphs needs to be updated.
2681                 pi.full_repaint = true;
2682                 pi.pain.setDrawingEnabled(false);
2683                 tm.draw(pi, 0, y);
2684                 break;
2685
2686         case SingleParUpdate:
2687                 pi.full_repaint = false;
2688                 // In general, only the current row of the outermost paragraph
2689                 // will be redrawn. Particular cases where selection spans
2690                 // multiple paragraph are correctly detected in TextMetrics.
2691                 tm.draw(pi, 0, y);
2692                 break;
2693
2694         case DecorationUpdate:
2695                 // FIXME: We should also distinguish DecorationUpdate to avoid text
2696                 // drawing if possible. This is not possible to do easily right now
2697                 // because of the single backing pixmap.
2698
2699         case FullScreenUpdate:
2700                 // The whole screen, including insets, will be refreshed.
2701                 pi.full_repaint = true;
2702
2703                 // Clear background.
2704                 pain.fillRectangle(0, 0, width_, height_,
2705                         pi.backgroundColor(&buffer_.inset()));
2706
2707                 // Draw everything.
2708                 tm.draw(pi, 0, y);
2709
2710                 // and possibly grey out below
2711                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2712                 int const y2 = lastpm.second->position() + lastpm.second->descent();
2713
2714                 if (y2 < height_) {
2715                         Color color = buffer().isInternal()
2716                                 ? Color_background : Color_bottomarea;
2717                         pain.fillRectangle(0, y2, width_, height_ - y2, color);
2718                 }
2719                 break;
2720         }
2721         LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
2722
2723         // The scrollbar needs an update.
2724         updateScrollbar();
2725
2726         // Normalize anchor for next time
2727         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
2728         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2729         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
2730                 ParagraphMetrics const & pm = tm.parMetrics(pit);
2731                 if (pm.position() + pm.descent() > 0) {
2732                         d->anchor_pit_ = pit;
2733                         d->anchor_ypos_ = pm.position();
2734                         break;
2735                 }
2736         }
2737         LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
2738                 << "  anchor ypos = " << d->anchor_ypos_);
2739 }
2740
2741
2742 void BufferView::message(docstring const & msg)
2743 {
2744         if (d->gui_)
2745                 d->gui_->message(msg);
2746 }
2747
2748
2749 void BufferView::showDialog(string const & name)
2750 {
2751         if (d->gui_)
2752                 d->gui_->showDialog(name, string());
2753 }
2754
2755
2756 void BufferView::showDialog(string const & name,
2757         string const & data, Inset * inset)
2758 {
2759         if (d->gui_)
2760                 d->gui_->showDialog(name, data, inset);
2761 }
2762
2763
2764 void BufferView::updateDialog(string const & name, string const & data)
2765 {
2766         if (d->gui_)
2767                 d->gui_->updateDialog(name, data);
2768 }
2769
2770
2771 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
2772 {
2773         d->gui_ = gui;
2774 }
2775
2776
2777 // FIXME: Move this out of BufferView again
2778 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
2779 {
2780         if (!fname.isReadableFile()) {
2781                 docstring const error = from_ascii(strerror(errno));
2782                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2783                 docstring const text =
2784                   bformat(_("Could not read the specified document\n"
2785                             "%1$s\ndue to the error: %2$s"), file, error);
2786                 Alert::error(_("Could not read file"), text);
2787                 return docstring();
2788         }
2789
2790         if (!fname.isReadableFile()) {
2791                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2792                 docstring const text =
2793                   bformat(_("%1$s\n is not readable."), file);
2794                 Alert::error(_("Could not open file"), text);
2795                 return docstring();
2796         }
2797
2798         // FIXME UNICODE: We don't know the encoding of the file
2799         docstring file_content = fname.fileContents("UTF-8");
2800         if (file_content.empty()) {
2801                 Alert::error(_("Reading not UTF-8 encoded file"),
2802                              _("The file is not UTF-8 encoded.\n"
2803                                "It will be read as local 8Bit-encoded.\n"
2804                                "If this does not give the correct result\n"
2805                                "then please change the encoding of the file\n"
2806                                "to UTF-8 with a program other than LyX.\n"));
2807                 file_content = fname.fileContents("local8bit");
2808         }
2809
2810         return normalize_c(file_content);
2811 }
2812
2813
2814 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
2815 {
2816         docstring const tmpstr = contentsOfPlaintextFile(f);
2817
2818         if (tmpstr.empty())
2819                 return;
2820
2821         Cursor & cur = cursor();
2822         cap::replaceSelection(cur);
2823         buffer_.undo().recordUndo(cur);
2824         if (asParagraph)
2825                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr, cur.current_font);
2826         else
2827                 cur.innerText()->insertStringAsLines(cur, tmpstr, cur.current_font);
2828
2829         updateMetrics();
2830         buffer_.changed();
2831 }
2832
2833
2834 docstring const & BufferView::inlineCompletion() const
2835 {
2836         return d->inlineCompletion_;
2837 }
2838
2839
2840 size_t const & BufferView::inlineCompletionUniqueChars() const
2841 {
2842         return d->inlineCompletionUniqueChars_;
2843 }
2844
2845
2846 DocIterator const & BufferView::inlineCompletionPos() const
2847 {
2848         return d->inlineCompletionPos_;
2849 }
2850
2851
2852 bool samePar(DocIterator const & a, DocIterator const & b)
2853 {
2854         if (a.empty() && b.empty())
2855                 return true;
2856         if (a.empty() || b.empty())
2857                 return false;
2858         if (a.depth() != b.depth())
2859                 return false;
2860         return &a.innerParagraph() == &b.innerParagraph();
2861 }
2862
2863
2864 void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
2865         docstring const & completion, size_t uniqueChars)
2866 {
2867         uniqueChars = min(completion.size(), uniqueChars);
2868         bool changed = d->inlineCompletion_ != completion
2869                 || d->inlineCompletionUniqueChars_ != uniqueChars;
2870         bool singlePar = true;
2871         d->inlineCompletion_ = completion;
2872         d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
2873
2874         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
2875
2876         // at new position?
2877         DocIterator const & old = d->inlineCompletionPos_;
2878         if (old != pos) {
2879                 //lyxerr << "inlineCompletionPos changed" << std::endl;
2880                 // old or pos are in another paragraph?
2881                 if ((!samePar(cur, pos) && !pos.empty())
2882                     || (!samePar(cur, old) && !old.empty())) {
2883                         singlePar = false;
2884                         //lyxerr << "different paragraph" << std::endl;
2885                 }
2886                 d->inlineCompletionPos_ = pos;
2887         }
2888
2889         // set update flags
2890         if (changed) {
2891                 if (singlePar && !(cur.disp_.update() & Update::Force))
2892                         cur.updateFlags(cur.disp_.update() | Update::SinglePar);
2893                 else
2894                         cur.updateFlags(cur.disp_.update() | Update::Force);
2895         }
2896 }
2897
2898 } // namespace lyx