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(false);
 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(false);
 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(false);
 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(false);
 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                 buffer_.changed(true);
 577                 return;
 578         }
 579
 580         // cut off at the top
 581         if (value <= d->scrollbarParameters_.min) {
 582                 DocIterator dit = doc_iterator_begin(&buffer_);
 583                 showCursor(dit);
 584                 LYXERR(Debug::SCROLLING, "scroll to top");
 585                 return;
 586         }
 587
 588         // cut off at the bottom
 589         if (value >= d->scrollbarParameters_.max) {
 590                 DocIterator dit = doc_iterator_end(&buffer_);
 591                 dit.backwardPos();
 592                 showCursor(dit);
 593                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 594                 return;
 595         }
 596
 597         // find paragraph at target position
 598         int par_pos = d->scrollbarParameters_.min;
 599         pit_type i = 0;
 600         for (; i != int(d->par_height_.size()); ++i) {
 601                 par_pos += d->par_height_[i];
 602                 if (par_pos >= value)
 603                         break;
 604         }
 605
 606         if (par_pos < value) {
 607                 // It seems we didn't find the correct pit so stay on the safe side and
 608                 // scroll to bottom.
 609                 LYXERR0("scrolling position not found!");
 610                 scrollDocView(d->scrollbarParameters_.max);
 611                 return;
 612         }
 613
 614         DocIterator dit = doc_iterator_begin(&buffer_);
 615         dit.pit() = i;
 616         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 617         showCursor(dit);
 618 }
 619
 620
 621 // FIXME: this method is not working well.
 622 void BufferView::setCursorFromScrollbar()
 623 {
 624         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 625
 626         int const height = 2 * defaultRowHeight();
 627         int const first = height;
 628         int const last = height_ - height;
 629         int newy = 0;
 630         Cursor const & oldcur = d->cursor_;
 631
 632         switch (cursorStatus(oldcur)) {
 633         case CUR_ABOVE:
 634                 newy = first;
 635                 break;
 636         case CUR_BELOW:
 637                 newy = last;
 638                 break;
 639         case CUR_INSIDE:
 640                 int const y = getPos(oldcur, oldcur.boundary()).y_;
 641                 newy = min(last, max(y, first));
 642                 if (y == newy)
 643                         return;
 644         }
 645         // We reset the cursor because cursorStatus() does not
 646         // work when the cursor is within mathed.
 647         Cursor cur(*this);
 648         cur.reset();
 649         tm.setCursorFromCoordinates(cur, 0, newy);
 650
 651         // update the bufferview cursor and notify insets
 652         // FIXME: Care about the d->cursor_ flags to redraw if needed
 653         Cursor old = d->cursor_;
 654         mouseSetCursor(cur);
 655         bool badcursor = notifyCursorLeavesOrEnters(old, d->cursor_);
 656         if (badcursor)
 657                 d->cursor_.fixIfBroken();
 658 }
 659
 660
 661 Change const BufferView::getCurrentChange() const
 662 {
 663         if (!d->cursor_.selection())
 664                 return Change(Change::UNCHANGED);
 665
 666         DocIterator dit = d->cursor_.selectionBegin();
 667         return dit.paragraph().lookupChange(dit.pos());
 668 }
 669
 670
 671 // this could be used elsewhere as well?
 672 // FIXME: This does not work within mathed!
 673 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 674 {
 675         Point const p = getPos(dit, dit.boundary());
 676         if (p.y_ < 0)
 677                 return CUR_ABOVE;
 678         if (p.y_ > workHeight())
 679                 return CUR_BELOW;
 680         return CUR_INSIDE;
 681 }
 682
 683
 684 void BufferView::bookmarkEditPosition()
 685 {
 686         // Don't eat cpu time for each keystroke
 687         if (d->cursor_.paragraph().id() == d->bookmark_edit_position_)
 688                 return;
 689         saveBookmark(0);
 690         d->bookmark_edit_position_ = d->cursor_.paragraph().id();
 691 }
 692
 693
 694 void BufferView::saveBookmark(unsigned int idx)
 695 {
 696         // tentatively save bookmark, id and pos will be used to
 697         // acturately locate a bookmark in a 'live' lyx session.
 698         // pit and pos will be updated with bottom level pit/pos
 699         // when lyx exits.
 700         theSession().bookmarks().save(
 701                 buffer_.fileName(),
 702                 d->cursor_.bottom().pit(),
 703                 d->cursor_.bottom().pos(),
 704                 d->cursor_.paragraph().id(),
 705                 d->cursor_.pos(),
 706                 idx
 707         );
 708         if (idx)
 709                 // emit message signal.
 710                 message(_("Save bookmark"));
 711 }
 712
 713
 714 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 715         int top_id, pos_type top_pos)
 716 {
 717         bool success = false;
 718         DocIterator dit;
 719
 720         d->cursor_.clearSelection();
 721
 722         // if a valid par_id is given, try it first
 723         // This is the case for a 'live' bookmark when unique paragraph ID
 724         // is used to track bookmarks.
 725         if (top_id > 0) {
 726                 dit = buffer_.getParFromID(top_id);
 727                 if (!dit.atEnd()) {
 728                         dit.pos() = min(dit.paragraph().size(), top_pos);
 729                         // Some slices of the iterator may not be
 730                         // reachable (e.g. closed collapsable inset)
 731                         // so the dociterator may need to be
 732                         // shortened. Otherwise, setCursor may crash
 733                         // lyx when the cursor can not be set to these
 734                         // insets.
 735                         size_t const n = dit.depth();
 736                         for (size_t i = 0; i < n; ++i)
 737                                 if (!dit[i].inset().editable()) {
 738                                         dit.resize(i);
 739                                         break;
 740                                 }
 741                         success = true;
 742                 }
 743         }
 744
 745         // if top_id == 0, or searching through top_id failed
 746         // This is the case for a 'restored' bookmark when only bottom
 747         // (document level) pit was saved. Because of this, bookmark
 748         // restoration is inaccurate. If a bookmark was within an inset,
 749         // it will be restored to the left of the outmost inset that contains
 750         // the bookmark.
 751         if (bottom_pit < int(buffer_.paragraphs().size())) {
 752                 dit = doc_iterator_begin(&buffer_);
 753
 754                 dit.pit() = bottom_pit;
 755                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 756                 success = true;
 757         }
 758
 759         if (success) {
 760                 // Note: only bottom (document) level pit is set.
 761                 setCursor(dit);
 762                 // set the current font.
 763                 d->cursor_.setCurrentFont();
 764                 // To center the screen on this new position we need the
 765                 // paragraph position which is computed at draw() time.
 766                 // So we need a redraw!
 767                 buffer_.changed(false);
 768                 if (fitCursor())
 769                         showCursor();
 770         }
 771
 772         return success;
 773 }
 774
 775
 776 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 777 {
 778         if (lyxrc.rtl_support) {
 779                 if (d->cursor_.real_current_font.isRightToLeft()) {
 780                         if (d->intl_.keymap == Intl::PRIMARY)
 781                                 d->intl_.keyMapSec();
 782                 } else {
 783                         if (d->intl_.keymap == Intl::SECONDARY)
 784                                 d->intl_.keyMapPrim();
 785                 }
 786         }
 787
 788         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 789 }
 790
 791
 792 int BufferView::workWidth() const
 793 {
 794         return width_;
 795 }
 796
 797
 798 void BufferView::recenter()
 799 {
 800         showCursor(d->cursor_, true);
 801 }
 802
 803
 804 void BufferView::showCursor()
 805 {
 806         showCursor(d->cursor_, false);
 807 }
 808
 809
 810 void BufferView::showCursor(DocIterator const & dit, bool recenter)
 811 {
 812         if (scrollToCursor(dit, recenter))
 813                 buffer_.changed(false);
 814 }
 815
 816
 817 void BufferView::scrollToCursor()
 818 {
 819         scrollToCursor(d->cursor_, false);
 820 }
 821
 822
 823 bool BufferView::scrollToCursor(DocIterator const & dit, bool recenter)
 824 {
 825         // We are not properly started yet, delay until resizing is
 826         // done.
 827         if (height_ == 0)
 828                 return false;
 829
 830         LYXERR(Debug::SCROLLING, "recentering!");
 831
 832         CursorSlice const & bot = dit.bottom();
 833         TextMetrics & tm = d->text_metrics_[bot.text()];
 834
 835         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 836         int bot_pit = bot.pit();
 837         if (bot_pit > max_pit) {
 838                 // FIXME: Why does this happen?
 839                 LYXERR0("bottom pit is greater that max pit: "
 840                         << bot_pit << " > " << max_pit);
 841                 bot_pit = max_pit;
 842         }
 843
 844         if (bot_pit == tm.first().first - 1)
 845                 tm.newParMetricsUp();
 846         else if (bot_pit == tm.last().first + 1)
 847                 tm.newParMetricsDown();
 848
 849         if (tm.contains(bot_pit)) {
 850                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 851                 LASSERT(!pm.rows().empty(), /**/);
 852                 // FIXME: smooth scrolling doesn't work in mathed.
 853                 CursorSlice const & cs = dit.innerTextSlice();
 854                 int offset = coordOffset(dit, dit.boundary()).y_;
 855                 int ypos = pm.position() + offset;
 856                 Dimension const & row_dim =
 857                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 858                 int scrolled = 0;
 859                 if (recenter)
 860                         scrolled = scroll(ypos - height_/2);
 861                 else if (ypos - row_dim.ascent() < 0)
 862                         scrolled = scrollUp(- ypos + row_dim.ascent());
 863                 else if (ypos + row_dim.descent() > height_)
 864                         scrolled = scrollDown(ypos - height_ + defaultRowHeight() );
 865
 866                 // else, nothing to do, the cursor is already visible so we just return.
 867                 if (scrolled != 0) {
 868                         updateMetrics();
 869                         return true;
 870                 }
 871                 return false;
 872         }
 873
 874         // fix inline completion position
 875         if (d->inlineCompletionPos_.fixIfBroken())
 876                 d->inlineCompletionPos_ = DocIterator();
 877
 878         tm.redoParagraph(bot_pit);
 879         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 880         int offset = coordOffset(dit, dit.boundary()).y_;
 881
 882         d->anchor_pit_ = bot_pit;
 883         CursorSlice const & cs = dit.innerTextSlice();
 884         Dimension const & row_dim =
 885                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 886
 887         if (recenter)
 888                 d->anchor_ypos_ = height_/2;
 889         else if (d->anchor_pit_ == 0)
 890                 d->anchor_ypos_ = offset + pm.ascent();
 891         else if (d->anchor_pit_ == max_pit)
 892                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
 893         else if (offset > height_)
 894                 d->anchor_ypos_ = height_ - offset - defaultRowHeight();
 895         else
 896                 d->anchor_ypos_ = defaultRowHeight() * 2;
 897
 898         updateMetrics();
 899         return true;
 900 }
 901
 902
 903 void BufferView::updateLayout(DocumentClass const * const oldlayout)
 904 {
 905         message(_("Converting document to new document class..."));
 906
 907         StableDocIterator backcur(d->cursor_);
 908         ErrorList & el = buffer_.errorList("Class Switch");
 909         cap::switchBetweenClasses(
 910                         oldlayout, buffer_.params().documentClassPtr(),
 911                         static_cast<InsetText &>(buffer_.inset()), el);
 912
 913         setCursor(backcur.asDocIterator(&buffer_));
 914
 915         buffer_.errors("Class Switch");
 916         buffer_.updateLabels();
 917 }
 918
 919 /** Return the change status at cursor position, taking in account the
 920  * status at each level of the document iterator (a table in a deleted
 921  * footnote is deleted).
 922  * When \param outer is true, the top slice is not looked at.
 923  */
 924 static Change::Type lookupChangeType(DocIterator const & dit, bool outer = false)
 925 {
 926         size_t const depth = dit.depth() - (outer ? 1 : 0);
 927
 928         for (size_t i = 0 ; i < depth ; ++i) {
 929                 CursorSlice const & slice = dit[i];
 930                 if (!slice.inset().inMathed()
 931                     && slice.pos() < slice.paragraph().size()) {
 932                         Change::Type const ch = slice.paragraph().lookupChange(slice.pos()).type;
 933                         if (ch != Change::UNCHANGED)
 934                                 return ch;
 935                 }
 936         }
 937         return Change::UNCHANGED;
 938 }
 939
 940
 941 bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
 942 {
 943         // Can we use a readonly buffer?
 944         if (buffer_.isReadonly()
 945             && !lyxaction.funcHasFlag(cmd.action, LyXAction::ReadOnly)
 946             && !lyxaction.funcHasFlag(cmd.action, LyXAction::NoBuffer)) {
 947                 flag.message(from_utf8(N_("Document is read-only")));
 948                 flag.setEnabled(false);
 949                 return true;
 950         }
 951         // Are we in a DELETED change-tracking region?
 952         if (lookupChangeType(d->cursor_, true) == Change::DELETED
 953             && !lyxaction.funcHasFlag(cmd.action, LyXAction::ReadOnly)
 954             && !lyxaction.funcHasFlag(cmd.action, LyXAction::NoBuffer)) {
 955                 flag.message(from_utf8(N_("This portion of the document is deleted.")));
 956                 flag.setEnabled(false);
 957                 return true;
 958         }
 959
 960         Cursor & cur = d->cursor_;
 961
 962         if (cur.getStatus(cmd, flag))
 963                 return true;
 964
 965         switch (cmd.action) {
 966
 967         // FIXME: This is a bit problematic because we don't check is this is a
 968         // document BufferView or not for these LFUNs. We probably have to
 969         // dispatch both to currentBufferView() and, if that fails,
 970         // to documentBufferView(); same as we do know for current Buffer and
 971         // document Buffer. Ideally those LFUN should go to Buffer as they*
 972         // operate on the full Buffer and the cursor is only needed either for
 973         // an Undo record or to restore a cursor position. But we don't know
 974         // how to do that inside Buffer of course.
 975         case LFUN_BUFFER_PARAMS_APPLY:
 976         case LFUN_LAYOUT_MODULES_CLEAR:
 977         case LFUN_LAYOUT_MODULE_ADD:
 978         case LFUN_LAYOUT_RELOAD:
 979         case LFUN_TEXTCLASS_APPLY:
 980         case LFUN_TEXTCLASS_LOAD:
 981                 flag.setEnabled(!buffer_.isReadonly());
 982                 break;
 983
 984         case LFUN_UNDO:
 985                 flag.setEnabled(buffer_.undo().hasUndoStack());
 986                 break;
 987         case LFUN_REDO:
 988                 flag.setEnabled(buffer_.undo().hasRedoStack());
 989                 break;
 990         case LFUN_FILE_INSERT:
 991         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 992         case LFUN_FILE_INSERT_PLAINTEXT:
 993         case LFUN_BOOKMARK_SAVE:
 994                 // FIXME: Actually, these LFUNS should be moved to Text
 995                 flag.setEnabled(cur.inTexted());
 996                 break;
 997
 998         case LFUN_FONT_STATE:
 999         case LFUN_LABEL_INSERT:
1000         case LFUN_INFO_INSERT:
1001         case LFUN_INSET_EDIT:
1002         case LFUN_PARAGRAPH_GOTO:
1003         case LFUN_NOTE_NEXT:
1004         case LFUN_REFERENCE_NEXT:
1005         case LFUN_WORD_FIND:
1006         case LFUN_WORD_FIND_FORWARD:
1007         case LFUN_WORD_FIND_BACKWARD:
1008         case LFUN_WORD_FINDADV:
1009         case LFUN_WORD_REPLACE:
1010         case LFUN_MARK_OFF:
1011         case LFUN_MARK_ON:
1012         case LFUN_MARK_TOGGLE:
1013         case LFUN_SCREEN_RECENTER:
1014         case LFUN_SCREEN_SHOW_CURSOR:
1015         case LFUN_BIBTEX_DATABASE_ADD:
1016         case LFUN_BIBTEX_DATABASE_DEL:
1017         case LFUN_NOTES_MUTATE:
1018         case LFUN_ALL_INSETS_TOGGLE:
1019         case LFUN_STATISTICS:
1020         case LFUN_BRANCH_ADD_INSERT:
1021         case LFUN_KEYMAP_OFF:
1022         case LFUN_KEYMAP_PRIMARY:
1023         case LFUN_KEYMAP_SECONDARY:
1024         case LFUN_KEYMAP_TOGGLE:
1025                 flag.setEnabled(true);
1026                 break;
1027
1028         case LFUN_REGEXP_MODE:
1029                 // FIXME: Test if current WorkArea is the search WorkArea
1030                 flag.setEnabled(buffer().isInternal() && !cur.inRegexped());
1031                 break;
1032
1033         case LFUN_LABEL_COPY_AS_REF: {
1034                 // if there is an inset at cursor, see whether it
1035                 // handles the lfun
1036                 Inset * inset = cur.nextInset();
1037                 if (!inset || !inset->getStatus(cur, cmd, flag))
1038                         flag.setEnabled(false);
1039                 break;
1040         }
1041
1042         case LFUN_NEXT_INSET_MODIFY: {
1043                 // this is the real function we want to invoke
1044                 FuncRequest tmpcmd = cmd;
1045                 tmpcmd.action = LFUN_INSET_MODIFY;
1046                 // if there is an inset at cursor, see whether it
1047                 // handles the lfun, other start from scratch
1048                 Inset * inset = cur.nextInset();
1049                 if (!inset || !inset->getStatus(cur, tmpcmd, flag))
1050                         flag = lyx::getStatus(tmpcmd);
1051                 break;
1052         }
1053
1054         case LFUN_LABEL_GOTO: {
1055                 flag.setEnabled(!cmd.argument().empty()
1056                     || getInsetByCode<InsetRef>(cur, REF_CODE));
1057                 break;
1058         }
1059
1060         case LFUN_CHANGES_TRACK:
1061                 flag.setEnabled(true);
1062                 flag.setOnOff(buffer_.params().trackChanges);
1063                 break;
1064
1065         case LFUN_CHANGES_OUTPUT:
1066                 flag.setEnabled(true);
1067                 flag.setOnOff(buffer_.params().outputChanges);
1068                 break;
1069
1070         case LFUN_CHANGES_MERGE:
1071         case LFUN_CHANGE_NEXT:
1072         case LFUN_CHANGE_PREVIOUS:
1073         case LFUN_ALL_CHANGES_ACCEPT:
1074         case LFUN_ALL_CHANGES_REJECT:
1075                 // TODO: context-sensitive enabling of LFUNs
1076                 // In principle, these command should only be enabled if there
1077                 // is a change in the document. However, without proper
1078                 // optimizations, this will inevitably result in poor performance.
1079                 flag.setEnabled(true);
1080                 break;
1081
1082         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
1083                 flag.setOnOff(buffer_.params().compressed);
1084                 break;
1085         }
1086
1087         case LFUN_SCREEN_UP:
1088         case LFUN_SCREEN_DOWN:
1089         case LFUN_SCROLL:
1090         case LFUN_SCREEN_UP_SELECT:
1091         case LFUN_SCREEN_DOWN_SELECT:
1092         case LFUN_INSET_FORALL:
1093                 flag.setEnabled(true);
1094                 break;
1095
1096         case LFUN_LAYOUT_TABULAR:
1097                 flag.setEnabled(cur.innerInsetOfType(TABULAR_CODE));
1098                 break;
1099
1100         case LFUN_LAYOUT:
1101                 flag.setEnabled(!cur.inset().forcePlainLayout(cur.idx()));
1102                 break;
1103
1104         case LFUN_LAYOUT_PARAGRAPH:
1105                 flag.setEnabled(cur.inset().allowParagraphCustomization(cur.idx()));
1106                 break;
1107
1108         case LFUN_DIALOG_SHOW_NEW_INSET:
1109                 // FIXME: this is wrong, but I do not understand the
1110                 // intent (JMarc)
1111                 if (cur.inset().lyxCode() == CAPTION_CODE)
1112                         return cur.inset().getStatus(cur, cmd, flag);
1113                 // FIXME we should consider passthru paragraphs too.
1114                 flag.setEnabled(!cur.inset().getLayout().isPassThru());
1115                 break;
1116
1117         case LFUN_CITATION_INSERT: {
1118                 FuncRequest fr(LFUN_INSET_INSERT, "citation");
1119                 // FIXME: This could turn in a recursive hell.
1120                 // Shouldn't we use Buffer::getStatus() instead?
1121                 flag.setEnabled(lyx::getStatus(fr).enabled());
1122                 break;
1123         }
1124         case LFUN_INSET_APPLY: {
1125                 string const name = cmd.getArg(0);
1126                 Inset * inset = editedInset(name);
1127                 if (inset) {
1128                         FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1129                         FuncStatus fs;
1130                         if (!inset->getStatus(cur, fr, fs)) {
1131                                 // Every inset is supposed to handle this
1132                                 LASSERT(false, break);
1133                         }
1134                         flag |= fs;
1135                 } else {
1136                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1137                         flag |= lyx::getStatus(fr);
1138                 }
1139                 break;
1140         }
1141
1142         default:
1143                 flag.setEnabled(false);
1144                 return false;
1145         }
1146
1147         return true;
1148 }
1149
1150
1151 Inset * BufferView::editedInset(string const & name) const
1152 {
1153         map<string, Inset *>::const_iterator it = d->edited_insets_.find(name);
1154         return it == d->edited_insets_.end() ? 0 : it->second;
1155 }
1156
1157
1158 void BufferView::editInset(string const & name, Inset * inset)
1159 {
1160         d->edited_insets_[name] = inset;
1161 }
1162
1163
1164 bool BufferView::dispatch(FuncRequest const & cmd)
1165 {
1166         //lyxerr << [ cmd = " << cmd << "]" << endl;
1167
1168         // Make sure that the cached BufferView is correct.
1169         LYXERR(Debug::ACTION, " action[" << cmd.action << ']'
1170                 << " arg[" << to_utf8(cmd.argument()) << ']'
1171                 << " x[" << cmd.x << ']'
1172                 << " y[" << cmd.y << ']'
1173                 << " button[" << cmd.button() << ']');
1174
1175         string const argument = to_utf8(cmd.argument());
1176         Cursor & cur = d->cursor_;
1177
1178         // Don't dispatch function that does not apply to internal buffers.
1179         if (buffer_.isInternal()
1180             && lyxaction.funcHasFlag(cmd.action, LyXAction::NoInternal))
1181                 return false;
1182
1183         // We'll set this back to false if need be.
1184         bool dispatched = true;
1185         buffer_.undo().beginUndoGroup();
1186
1187         switch (cmd.action) {
1188
1189         case LFUN_BUFFER_PARAMS_APPLY: {
1190                 DocumentClass const * const oldClass = buffer_.params().documentClassPtr();
1191                 cur.recordUndoFullDocument();
1192                 istringstream ss(to_utf8(cmd.argument()));
1193                 Lexer lex;
1194                 lex.setStream(ss);
1195                 int const unknown_tokens = buffer_.readHeader(lex);
1196                 if (unknown_tokens != 0) {
1197                         LYXERR0("Warning in LFUN_BUFFER_PARAMS_APPLY!\n"
1198                                                 << unknown_tokens << " unknown token"
1199                                                 << (unknown_tokens == 1 ? "" : "s"));
1200                 }
1201                 updateLayout(oldClass);
1202
1203                 // We are most certainly here because of a change in the document
1204                 // It is then better to make sure that all dialogs are in sync with
1205                 // current document settings.
1206                 processUpdateFlags(Update::Force | Update::FitCursor);
1207                 break;
1208         }
1209
1210         case LFUN_LAYOUT_MODULES_CLEAR: {
1211                 DocumentClass const * const oldClass =
1212                         buffer_.params().documentClassPtr();
1213                 cur.recordUndoFullDocument();
1214                 buffer_.params().clearLayoutModules();
1215                 buffer_.params().makeDocumentClass();
1216                 updateLayout(oldClass);
1217                 processUpdateFlags(Update::Force | Update::FitCursor);
1218                 break;
1219         }
1220
1221         case LFUN_LAYOUT_MODULE_ADD: {
1222                 BufferParams const & params = buffer_.params();
1223                 if (!params.moduleCanBeAdded(argument)) {
1224                         LYXERR0("Module `" << argument <<
1225                                 "' cannot be added due to failed requirements or "
1226                                 "conflicts with installed modules.");
1227                         break;
1228                 }
1229                 DocumentClass const * const oldClass = params.documentClassPtr();
1230                 cur.recordUndoFullDocument();
1231                 buffer_.params().addLayoutModule(argument);
1232                 buffer_.params().makeDocumentClass();
1233                 updateLayout(oldClass);
1234                 processUpdateFlags(Update::Force | Update::FitCursor);
1235                 break;
1236         }
1237
1238         case LFUN_TEXTCLASS_APPLY: {
1239                 if (!LayoutFileList::get().load(argument, buffer_.temppath()) &&
1240                         !LayoutFileList::get().load(argument, buffer_.filePath()))
1241                         break;
1242
1243                 LayoutFile const * old_layout = buffer_.params().baseClass();
1244                 LayoutFile const * new_layout = &(LayoutFileList::get()[argument]);
1245
1246                 if (old_layout == new_layout)
1247                         // nothing to do
1248                         break;
1249
1250                 //Save the old, possibly modular, layout for use in conversion.
1251                 DocumentClass const * const oldDocClass =
1252                         buffer_.params().documentClassPtr();
1253                 cur.recordUndoFullDocument();
1254                 buffer_.params().setBaseClass(argument);
1255                 buffer_.params().makeDocumentClass();
1256                 updateLayout(oldDocClass);
1257                 processUpdateFlags(Update::Force | Update::FitCursor);
1258                 break;
1259         }
1260
1261         case LFUN_TEXTCLASS_LOAD:
1262                 LayoutFileList::get().load(argument, buffer_.temppath()) ||
1263                 LayoutFileList::get().load(argument, buffer_.filePath());
1264                 break;
1265
1266         case LFUN_LAYOUT_RELOAD: {
1267                 DocumentClass const * const oldClass = buffer_.params().documentClassPtr();
1268                 LayoutFileIndex bc = buffer_.params().baseClassID();
1269                 LayoutFileList::get().reset(bc);
1270                 buffer_.params().setBaseClass(bc);
1271                 buffer_.params().makeDocumentClass();
1272                 updateLayout(oldClass);
1273                 processUpdateFlags(Update::Force | Update::FitCursor);
1274                 break;
1275         }
1276
1277         case LFUN_UNDO:
1278                 cur.message(_("Undo"));
1279                 cur.clearSelection();
1280                 if (!cur.textUndo())
1281                         cur.message(_("No further undo information"));
1282                 else
1283                         processUpdateFlags(Update::Force | Update::FitCursor);
1284                 break;
1285
1286         case LFUN_REDO:
1287                 cur.message(_("Redo"));
1288                 cur.clearSelection();
1289                 if (!cur.textRedo())
1290                         cur.message(_("No further redo information"));
1291                 else
1292                         processUpdateFlags(Update::Force | Update::FitCursor);
1293                 break;
1294
1295         case LFUN_FONT_STATE:
1296                 cur.message(cur.currentState());
1297                 break;
1298
1299         case LFUN_BOOKMARK_SAVE:
1300                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1301                 break;
1302
1303         case LFUN_LABEL_GOTO: {
1304                 docstring label = cmd.argument();
1305                 if (label.empty()) {
1306                         InsetRef * inset =
1307                                 getInsetByCode<InsetRef>(cur, REF_CODE);
1308                         if (inset) {
1309                                 label = inset->getParam("reference");
1310                                 // persistent=false: use temp_bookmark
1311                                 saveBookmark(0);
1312                         }
1313                 }
1314                 if (!label.empty())
1315                         gotoLabel(label);
1316                 break;
1317         }
1318
1319         case LFUN_INSET_EDIT: {
1320                 FuncRequest fr(cmd);
1321                 // if there is an inset at cursor, see whether it
1322                 // can be modified.
1323                 Inset * inset = cur.nextInset();
1324                 if (inset)
1325                         inset->dispatch(cur, fr);
1326                 // if it did not work, try the underlying inset.
1327                 if (!inset || !cur.result().dispatched())
1328                         cur.dispatch(cmd);
1329
1330                 // FIXME I'm adding the last break to solve a crash,
1331                 // but that is obviously not right.
1332                 if (!cur.result().dispatched())
1333                         // It did not work too; no action needed.
1334                         break;
1335                 break;
1336         }
1337
1338         case LFUN_PARAGRAPH_GOTO: {
1339                 int const id = convert<int>(cmd.getArg(0));
1340                 int const pos = convert<int>(cmd.getArg(1));
1341                 int i = 0;
1342                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1343                         b = theBufferList().next(b)) {
1344
1345                         DocIterator dit = b->getParFromID(id);
1346                         if (dit.atEnd()) {
1347                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1348                                 ++i;
1349                                 continue;
1350                         }
1351                         LYXERR(Debug::INFO, "Paragraph " << dit.paragraph().id()
1352                                 << " found in buffer `"
1353                                 << b->absFileName() << "'.");
1354
1355                         if (b == &buffer_) {
1356                                 // Set the cursor
1357                                 dit.pos() = pos;
1358                                 setCursor(dit);
1359                                 processUpdateFlags(Update::Force | Update::FitCursor);
1360                         } else {
1361                                 // Switch to other buffer view and resend cmd
1362                                 theLyXFunc().dispatch(FuncRequest(
1363                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1364                                 theLyXFunc().dispatch(cmd);
1365                         }
1366                         break;
1367                 }
1368                 break;
1369         }
1370
1371         case LFUN_NOTE_NEXT:
1372                 gotoInset(this, NOTE_CODE, false);
1373                 break;
1374
1375         case LFUN_REFERENCE_NEXT: {
1376                 vector<InsetCode> tmp;
1377                 tmp.push_back(LABEL_CODE);
1378                 tmp.push_back(REF_CODE);
1379                 gotoInset(this, tmp, true);
1380                 break;
1381         }
1382
1383         case LFUN_CHANGES_TRACK:
1384                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
1385                 break;
1386
1387         case LFUN_CHANGES_OUTPUT:
1388                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
1389                 if (buffer_.params().outputChanges) {
1390                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
1391                         bool xcolorulem = LaTeXFeatures::isAvailable("ulem") &&
1392                                           LaTeXFeatures::isAvailable("xcolor");
1393
1394                         if (!dvipost && !xcolorulem) {
1395                                 Alert::warning(_("Changes not shown in LaTeX output"),
1396                                                _("Changes will not be highlighted in LaTeX output, "
1397                                                  "because neither dvipost nor xcolor/ulem are installed.\n"
1398                                                  "Please install these packages or redefine "
1399                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1400                         } else if (!xcolorulem) {
1401                                 Alert::warning(_("Changes not shown in LaTeX output"),
1402                                                _("Changes will not be highlighted in LaTeX output "
1403                                                  "when using pdflatex, because xcolor and ulem are not installed.\n"
1404                                                  "Please install both packages or redefine "
1405                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1406                         }
1407                 }
1408                 break;
1409
1410         case LFUN_CHANGE_NEXT:
1411                 findNextChange(this);
1412                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1413                 processUpdateFlags(Update::Force | Update::FitCursor);
1414                 break;
1415
1416         case LFUN_CHANGE_PREVIOUS:
1417                 findPreviousChange(this);
1418                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1419                 processUpdateFlags(Update::Force | Update::FitCursor);
1420                 break;
1421
1422         case LFUN_CHANGES_MERGE:
1423                 if (findNextChange(this) || findPreviousChange(this)) {
1424                         processUpdateFlags(Update::Force | Update::FitCursor);
1425                         showDialog("changes");
1426                 }
1427                 break;
1428
1429         case LFUN_ALL_CHANGES_ACCEPT:
1430                 // select complete document
1431                 cur.reset();
1432                 cur.selHandle(true);
1433                 buffer_.text().cursorBottom(cur);
1434                 // accept everything in a single step to support atomic undo
1435                 buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
1436                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1437                 processUpdateFlags(Update::Force | Update::FitCursor);
1438                 break;
1439
1440         case LFUN_ALL_CHANGES_REJECT:
1441                 // select complete document
1442                 cur.reset();
1443                 cur.selHandle(true);
1444                 buffer_.text().cursorBottom(cur);
1445                 // reject everything in a single step to support atomic undo
1446                 // Note: reject does not work recursively; the user may have to repeat the operation
1447                 buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
1448                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1449                 processUpdateFlags(Update::Force | Update::FitCursor);
1450                 break;
1451
1452         case LFUN_WORD_FIND_FORWARD:
1453         case LFUN_WORD_FIND_BACKWARD: {
1454                 static docstring last_search;
1455                 docstring searched_string;
1456
1457                 if (!cmd.argument().empty()) {
1458                         last_search = cmd.argument();
1459                         searched_string = cmd.argument();
1460                 } else {
1461                         searched_string = last_search;
1462                 }
1463
1464                 if (searched_string.empty())
1465                         break;
1466
1467                 bool const fw = cmd.action == LFUN_WORD_FIND_FORWARD;
1468                 docstring const data =
1469                         find2string(searched_string, true, false, fw);
1470                 find(this, FuncRequest(LFUN_WORD_FIND, data));
1471                 break;
1472         }
1473
1474         case LFUN_WORD_FIND: {
1475                 FuncRequest req = cmd;
1476                 if (cmd.argument().empty() && !d->search_request_cache_.argument().empty())
1477                         req = d->search_request_cache_;
1478                 if (req.argument().empty()) {
1479                         theLyXFunc().dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
1480                         break;
1481                 }
1482                 if (find(this, req))
1483                         showCursor();
1484                 else
1485                         message(_("String not found!"));
1486                 d->search_request_cache_ = req;
1487                 break;
1488         }
1489
1490         case LFUN_WORD_REPLACE: {
1491                 bool has_deleted = false;
1492                 if (cur.selection()) {
1493                         DocIterator beg = cur.selectionBegin();
1494                         DocIterator end = cur.selectionEnd();
1495                         if (beg.pit() == end.pit()) {
1496                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1497                                         if (cur.paragraph().isDeleted(p))
1498                                                 has_deleted = true;
1499                                 }
1500                         }
1501                 }
1502                 replace(this, cmd, has_deleted);
1503                 break;
1504         }
1505
1506         case LFUN_WORD_FINDADV: {
1507                 FindAndReplaceOptions opt;
1508                 istringstream iss(to_utf8(cmd.argument()));
1509                 iss >> opt;
1510                 if (findAdv(this, opt))
1511                         cur.dispatched();
1512                 else
1513                         cur.undispatched();
1514                 break;
1515         }
1516
1517         case LFUN_MARK_OFF:
1518                 cur.clearSelection();
1519                 cur.message(from_utf8(N_("Mark off")));
1520                 break;
1521
1522         case LFUN_MARK_ON:
1523                 cur.clearSelection();
1524                 cur.setMark(true);
1525                 cur.message(from_utf8(N_("Mark on")));
1526                 break;
1527
1528         case LFUN_MARK_TOGGLE:
1529                 cur.setSelection(false);
1530                 if (cur.mark()) {
1531                         cur.setMark(false);
1532                         cur.message(from_utf8(N_("Mark removed")));
1533                 } else {
1534                         cur.setMark(true);
1535                         cur.message(from_utf8(N_("Mark set")));
1536                 }
1537                 cur.resetAnchor();
1538                 break;
1539
1540         case LFUN_SCREEN_SHOW_CURSOR:
1541                 showCursor();
1542                 break;
1543
1544         case LFUN_SCREEN_RECENTER:
1545                 recenter();
1546                 break;
1547
1548         case LFUN_BIBTEX_DATABASE_ADD: {
1549                 Cursor tmpcur = cur;
1550                 findInset(tmpcur, BIBTEX_CODE, false);
1551                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1552                                                 BIBTEX_CODE);
1553                 if (inset) {
1554                         if (inset->addDatabase(cmd.argument()))
1555                                 buffer_.updateBibfilesCache();
1556                 }
1557                 break;
1558         }
1559
1560         case LFUN_BIBTEX_DATABASE_DEL: {
1561                 Cursor tmpcur = cur;
1562                 findInset(tmpcur, BIBTEX_CODE, false);
1563                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1564                                                 BIBTEX_CODE);
1565                 if (inset) {
1566                         if (inset->delDatabase(cmd.argument()))
1567                                 buffer_.updateBibfilesCache();
1568                 }
1569                 break;
1570         }
1571
1572         case LFUN_STATISTICS: {
1573                 DocIterator from, to;
1574                 if (cur.selection()) {
1575                         from = cur.selectionBegin();
1576                         to = cur.selectionEnd();
1577                 } else {
1578                         from = doc_iterator_begin(&buffer_);
1579                         to = doc_iterator_end(&buffer_);
1580                 }
1581                 int const words = countWords(from, to);
1582                 int const chars = countChars(from, to, false);
1583                 int const chars_blanks = countChars(from, to, true);
1584                 docstring message;
1585                 if (cur.selection())
1586                         message = _("Statistics for the selection:");
1587                 else
1588                         message = _("Statistics for the document:");
1589                 message += "\n\n";
1590                 if (words != 1)
1591                         message += bformat(_("%1$d words"), words);
1592                 else
1593                         message += _("One word");
1594                 message += "\n";
1595                 if (chars_blanks != 1)
1596                         message += bformat(_("%1$d characters (including blanks)"),
1597                                           chars_blanks);
1598                 else
1599                         message += _("One character (including blanks)");
1600                 message += "\n";
1601                 if (chars != 1)
1602                         message += bformat(_("%1$d characters (excluding blanks)"),
1603                                           chars);
1604                 else
1605                         message += _("One character (excluding blanks)");
1606
1607                 Alert::information(_("Statistics"), message);
1608         }
1609                 break;
1610
1611         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1612                 // turn compression on/off
1613                 buffer_.params().compressed = !buffer_.params().compressed;
1614                 break;
1615
1616         case LFUN_LABEL_COPY_AS_REF: {
1617                 // if there is an inset at cursor, try to copy it
1618                 Inset * inset = &cur.inset();
1619                 if (!inset || !inset->asInsetMath())
1620                         inset = cur.nextInset();
1621                 if (inset) {
1622                         FuncRequest tmpcmd = cmd;
1623                         inset->dispatch(cur, tmpcmd);
1624                 }
1625                 if (!cur.result().dispatched())
1626                         // It did not work too; no action needed.
1627                         break;
1628                 cur.clearSelection();
1629                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1630                 break;
1631         }
1632
1633         case LFUN_NEXT_INSET_MODIFY: {
1634                 // create the the real function we want to invoke
1635                 FuncRequest tmpcmd = cmd;
1636                 tmpcmd.action = LFUN_INSET_MODIFY;
1637                 // if there is an inset at cursor, see whether it
1638                 // can be modified.
1639                 Inset * inset = cur.nextInset();
1640                 if (inset) {
1641                         cur.recordUndo();
1642                         inset->dispatch(cur, tmpcmd);
1643                 }
1644                 // if it did not work, try the underlying inset.
1645                 if (!inset || !cur.result().dispatched()) {
1646                         cur.recordUndo();
1647                         cur.dispatch(tmpcmd);
1648                 }
1649
1650                 if (!cur.result().dispatched())
1651                         // It did not work too; no action needed.
1652                         break;
1653                 cur.clearSelection();
1654                 processUpdateFlags(Update::Force | Update::FitCursor);
1655                 break;
1656         }
1657
1658         case LFUN_SCREEN_UP:
1659         case LFUN_SCREEN_DOWN: {
1660                 Point p = getPos(cur, cur.boundary());
1661                 // This code has been commented out to enable to scroll down a
1662                 // document, even if there are large insets in it (see bug #5465).
1663                 /*if (p.y_ < 0 || p.y_ > height_) {
1664                         // The cursor is off-screen so recenter before proceeding.
1665                         showCursor();
1666                         p = getPos(cur, cur.boundary());
1667                 }*/
1668                 int const scrolled = scroll(cmd.action == LFUN_SCREEN_UP
1669                         ? -height_ : height_);
1670                 if (cmd.action == LFUN_SCREEN_UP && scrolled > -height_)
1671                         p = Point(0, 0);
1672                 if (cmd.action == LFUN_SCREEN_DOWN && scrolled < height_)
1673                         p = Point(width_, height_);
1674                 Cursor old = cur;
1675                 bool const in_texted = cur.inTexted();
1676                 cur.reset();
1677                 buffer_.changed(true);
1678                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
1679                         true, cmd.action == LFUN_SCREEN_UP);
1680                 //FIXME: what to do with cur.x_target()?
1681                 bool update = in_texted && cur.bv().checkDepm(cur, old);
1682                 cur.finishUndo();
1683                 if (update)
1684                         processUpdateFlags(Update::Force | Update::FitCursor);
1685                 break;
1686         }
1687
1688         case LFUN_SCROLL:
1689                 lfunScroll(cmd);
1690                 break;
1691
1692         case LFUN_SCREEN_UP_SELECT: {
1693                 cur.selHandle(true);
1694                 if (isTopScreen()) {
1695                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1696                         cur.finishUndo();
1697                         break;
1698                 }
1699                 int y = getPos(cur, cur.boundary()).y_;
1700                 int const ymin = y - height_ + defaultRowHeight();
1701                 while (y > ymin && cur.up())
1702                         y = getPos(cur, cur.boundary()).y_;
1703
1704                 cur.finishUndo();
1705                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1706                 break;
1707         }
1708
1709         case LFUN_SCREEN_DOWN_SELECT: {
1710                 cur.selHandle(true);
1711                 if (isBottomScreen()) {
1712                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1713                         cur.finishUndo();
1714                         break;
1715                 }
1716                 int y = getPos(cur, cur.boundary()).y_;
1717                 int const ymax = y + height_ - defaultRowHeight();
1718                 while (y < ymax && cur.down())
1719                         y = getPos(cur, cur.boundary()).y_;
1720
1721                 cur.finishUndo();
1722                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1723                 break;
1724         }
1725
1726         // This could be rewriten using some command like forall <insetname> <command>
1727         // once the insets refactoring is done.
1728         case LFUN_NOTES_MUTATE: {
1729                 if (cmd.argument().empty())
1730                         break;
1731
1732                 if (mutateNotes(cur, cmd.getArg(0), cmd.getArg(1))) {
1733                         processUpdateFlags(Update::Force);
1734                 }
1735                 break;
1736         }
1737
1738
1739         // This would be in Buffer class if only Cursor did not
1740         // require a bufferview
1741         case LFUN_INSET_FORALL: {
1742                 docstring const name = from_utf8(cmd.getArg(0));
1743                 string const commandstr = cmd.getLongArg(1);
1744                 FuncRequest const fr = lyxaction.lookupFunc(commandstr);
1745
1746                 // an arbitrary number to limit number of iterations
1747                 const int max_iter = 10000;
1748                 int iterations = 0;
1749                 Cursor & cur = d->cursor_;
1750                 Cursor const savecur = cur;
1751                 cur.reset();
1752                 if (!cur.nextInset())
1753                         cur.forwardInset();
1754                 cur.beginUndoGroup();
1755                 while(cur && iterations < max_iter) {
1756                         Inset * ins = cur.nextInset();
1757                         if (!ins)
1758                                 break;
1759                         docstring insname = ins->name();
1760                         while (!insname.empty()) {
1761                                 if (insname == name || name == from_utf8("*")) {
1762                                         cur.recordUndo();
1763                                         lyx::dispatch(fr);
1764                                         ++iterations;
1765                                         break;
1766                                 }
1767                                 size_t const i = insname.rfind(':');
1768                                 if (i == string::npos)
1769                                         break;
1770                                 insname = insname.substr(0, i);
1771                         }
1772                         cur.forwardInset();
1773                 }
1774                 cur.endUndoGroup();
1775                 cur = savecur;
1776                 cur.fixIfBroken();
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(false);
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(false);
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         buffer_.changed(true);
2099 }
2100
2101
2102 int BufferView::minVisiblePart()
2103 {
2104         return 2 * defaultRowHeight();
2105 }
2106
2107
2108 int BufferView::scroll(int y)
2109 {
2110         if (y > 0)
2111                 return scrollDown(y);
2112         if (y < 0)
2113                 return scrollUp(-y);
2114         return 0;
2115 }
2116
2117
2118 int BufferView::scrollDown(int offset)
2119 {
2120         Text * text = &buffer_.text();
2121         TextMetrics & tm = d->text_metrics_[text];
2122         int const ymax = height_ + offset;
2123         while (true) {
2124                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
2125                 int bottom_pos = last.second->position() + last.second->descent();
2126                 if (lyxrc.scroll_below_document)
2127                         bottom_pos += height_ - minVisiblePart();
2128                 if (last.first + 1 == int(text->paragraphs().size())) {
2129                         if (bottom_pos <= height_)
2130                                 return 0;
2131                         offset = min(offset, bottom_pos - height_);
2132                         break;
2133                 }
2134                 if (bottom_pos > ymax)
2135                         break;
2136                 tm.newParMetricsDown();
2137         }
2138         d->anchor_ypos_ -= offset;
2139         return -offset;
2140 }
2141
2142
2143 int BufferView::scrollUp(int offset)
2144 {
2145         Text * text = &buffer_.text();
2146         TextMetrics & tm = d->text_metrics_[text];
2147         int ymin = - offset;
2148         while (true) {
2149                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
2150                 int top_pos = first.second->position() - first.second->ascent();
2151                 if (first.first == 0) {
2152                         if (top_pos >= 0)
2153                                 return 0;
2154                         offset = min(offset, - top_pos);
2155                         break;
2156                 }
2157                 if (top_pos < ymin)
2158                         break;
2159                 tm.newParMetricsUp();
2160         }
2161         d->anchor_ypos_ += offset;
2162         return offset;
2163 }
2164
2165
2166 void BufferView::setCursorFromRow(int row)
2167 {
2168         int tmpid = -1;
2169         int tmppos = -1;
2170
2171         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
2172
2173         d->cursor_.reset();
2174         if (tmpid == -1)
2175                 buffer_.text().setCursor(d->cursor_, 0, 0);
2176         else
2177                 buffer_.text().setCursor(d->cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
2178         recenter();
2179 }
2180
2181
2182 bool BufferView::setCursorFromInset(Inset const * inset)
2183 {
2184         // are we already there?
2185         if (cursor().nextInset() == inset)
2186                 return true;
2187
2188         // Inset is not at cursor position. Find it in the document.
2189         Cursor cur(*this);
2190         cur.reset();
2191         while (cur && cur.nextInset() != inset)
2192                 cur.forwardInset();
2193
2194         if (cur) {
2195                 setCursor(cur);
2196                 return true;
2197         }
2198         return false;
2199 }
2200
2201
2202 void BufferView::gotoLabel(docstring const & label)
2203 {
2204         std::vector<Buffer const *> bufs = buffer().allRelatives();
2205         std::vector<Buffer const *>::iterator it = bufs.begin();
2206         for (; it != bufs.end(); ++it) {
2207                 Buffer const * buf = *it;
2208
2209                 // find label
2210                 Toc & toc = buf->tocBackend().toc("label");
2211                 TocIterator toc_it = toc.begin();
2212                 TocIterator end = toc.end();
2213                 for (; toc_it != end; ++toc_it) {
2214                         if (label == toc_it->str()) {
2215                                 dispatch(toc_it->action());
2216                                 return;
2217                         }
2218                 }
2219         }
2220 }
2221
2222
2223 TextMetrics const & BufferView::textMetrics(Text const * t) const
2224 {
2225         return const_cast<BufferView *>(this)->textMetrics(t);
2226 }
2227
2228
2229 TextMetrics & BufferView::textMetrics(Text const * t)
2230 {
2231         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
2232         if (tmc_it == d->text_metrics_.end()) {
2233                 tmc_it = d->text_metrics_.insert(
2234                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
2235         }
2236         return tmc_it->second;
2237 }
2238
2239
2240 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
2241                 pit_type pit) const
2242 {
2243         return textMetrics(t).parMetrics(pit);
2244 }
2245
2246
2247 int BufferView::workHeight() const
2248 {
2249         return height_;
2250 }
2251
2252
2253 void BufferView::setCursor(DocIterator const & dit)
2254 {
2255         d->cursor_.reset();
2256         size_t const n = dit.depth();
2257         for (size_t i = 0; i < n; ++i)
2258                 dit[i].inset().edit(d->cursor_, true);
2259
2260         d->cursor_.setCursor(dit);
2261         d->cursor_.setSelection(false);
2262 }
2263
2264
2265 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
2266 {
2267         // Would be wrong to delete anything if we have a selection.
2268         if (cur.selection())
2269                 return false;
2270
2271         bool need_anchor_change = false;
2272         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
2273                 need_anchor_change);
2274
2275         if (need_anchor_change)
2276                 cur.resetAnchor();
2277
2278         if (!changed)
2279                 return false;
2280
2281         d->cursor_ = cur;
2282
2283         buffer_.updateLabels();
2284         buffer_.changed(true);
2285         return true;
2286 }
2287
2288
2289 bool BufferView::mouseSetCursor(Cursor & cur, bool select)
2290 {
2291         LASSERT(&cur.bv() == this, /**/);
2292
2293         if (!select)
2294                 // this event will clear selection so we save selection for
2295                 // persistent selection
2296                 cap::saveSelection(cursor());
2297
2298         d->cursor_.macroModeClose();
2299
2300         // Has the cursor just left the inset?
2301         bool leftinset = (&d->cursor_.inset() != &cur.inset());
2302         if (leftinset)
2303                 d->cursor_.fixIfBroken();
2304
2305         // FIXME: shift-mouse selection doesn't work well across insets.
2306         bool do_selection = select && &d->cursor_.anchor().inset() == &cur.inset();
2307
2308         // do the dEPM magic if needed
2309         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
2310         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
2311         // the leftinset bool would not be necessary (badcursor instead).
2312         bool update = leftinset;
2313         if (!do_selection && d->cursor_.inTexted())
2314                 update |= checkDepm(cur, d->cursor_);
2315
2316         if (!do_selection)
2317                 d->cursor_.resetAnchor();
2318         d->cursor_.setCursor(cur);
2319         d->cursor_.boundary(cur.boundary());
2320         if (do_selection)
2321                 d->cursor_.setSelection();
2322         else
2323                 d->cursor_.clearSelection();
2324
2325         d->cursor_.finishUndo();
2326         d->cursor_.setCurrentFont();
2327         return update;
2328 }
2329
2330
2331 void BufferView::putSelectionAt(DocIterator const & cur,
2332                                 int length, bool backwards)
2333 {
2334         d->cursor_.clearSelection();
2335
2336         setCursor(cur);
2337
2338         if (length) {
2339                 if (backwards) {
2340                         d->cursor_.pos() += length;
2341                         d->cursor_.setSelection(d->cursor_, -length);
2342                 } else
2343                         d->cursor_.setSelection(d->cursor_, length);
2344         }
2345         // Ensure a redraw happens in any case because the new selection could
2346         // possibly be on the same screen as the previous selection.
2347         processUpdateFlags(Update::Force | Update::FitCursor);
2348 }
2349
2350
2351 Cursor & BufferView::cursor()
2352 {
2353         return d->cursor_;
2354 }
2355
2356
2357 Cursor const & BufferView::cursor() const
2358 {
2359         return d->cursor_;
2360 }
2361
2362
2363 pit_type BufferView::anchor_ref() const
2364 {
2365         return d->anchor_pit_;
2366 }
2367
2368
2369 bool BufferView::singleParUpdate()
2370 {
2371         Text & buftext = buffer_.text();
2372         pit_type const bottom_pit = d->cursor_.bottom().pit();
2373         TextMetrics & tm = textMetrics(&buftext);
2374         int old_height = tm.parMetrics(bottom_pit).height();
2375
2376         // make sure inline completion pointer is ok
2377         if (d->inlineCompletionPos_.fixIfBroken())
2378                 d->inlineCompletionPos_ = DocIterator();
2379
2380         // In Single Paragraph mode, rebreak only
2381         // the (main text, not inset!) paragraph containing the cursor.
2382         // (if this paragraph contains insets etc., rebreaking will
2383         // recursively descend)
2384         tm.redoParagraph(bottom_pit);
2385         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
2386         if (pm.height() != old_height)
2387                 // Paragraph height has changed so we cannot proceed to
2388                 // the singlePar optimisation.
2389                 return false;
2390
2391         d->update_strategy_ = SingleParUpdate;
2392
2393         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
2394                 << " y2: " << pm.position() + pm.descent()
2395                 << " pit: " << bottom_pit
2396                 << " singlepar: 1");
2397         return true;
2398 }
2399
2400
2401 void BufferView::updateMetrics()
2402 {
2403         if (height_ == 0 || width_ == 0)
2404                 return;
2405
2406         Text & buftext = buffer_.text();
2407         pit_type const npit = int(buftext.paragraphs().size());
2408
2409         // Clear out the position cache in case of full screen redraw,
2410         d->coord_cache_.clear();
2411
2412         // Clear out paragraph metrics to avoid having invalid metrics
2413         // in the cache from paragraphs not relayouted below
2414         // The complete text metrics will be redone.
2415         d->text_metrics_.clear();
2416
2417         TextMetrics & tm = textMetrics(&buftext);
2418
2419         // make sure inline completion pointer is ok
2420         if (d->inlineCompletionPos_.fixIfBroken())
2421                 d->inlineCompletionPos_ = DocIterator();
2422
2423         if (d->anchor_pit_ >= npit)
2424                 // The anchor pit must have been deleted...
2425                 d->anchor_pit_ = npit - 1;
2426
2427         // Rebreak anchor paragraph.
2428         tm.redoParagraph(d->anchor_pit_);
2429         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
2430
2431         // position anchor
2432         if (d->anchor_pit_ == 0) {
2433                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
2434
2435                 // Complete buffer visible? Then it's easy.
2436                 if (scrollRange == 0)
2437                         d->anchor_ypos_ = anchor_pm.ascent();
2438
2439                 // FIXME: Some clever handling needed to show
2440                 // the _first_ paragraph up to the top if the cursor is
2441                 // in the first line.
2442         }
2443         anchor_pm.setPosition(d->anchor_ypos_);
2444
2445         LYXERR(Debug::PAINTING, "metrics: "
2446                 << " anchor pit = " << d->anchor_pit_
2447                 << " anchor ypos = " << d->anchor_ypos_);
2448
2449         // Redo paragraphs above anchor if necessary.
2450         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
2451         // We are now just above the anchor paragraph.
2452         pit_type pit1 = d->anchor_pit_ - 1;
2453         for (; pit1 >= 0 && y1 >= 0; --pit1) {
2454                 tm.redoParagraph(pit1);
2455                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
2456                 y1 -= pm.descent();
2457                 // Save the paragraph position in the cache.
2458                 pm.setPosition(y1);
2459                 y1 -= pm.ascent();
2460         }
2461
2462         // Redo paragraphs below the anchor if necessary.
2463         int y2 = d->anchor_ypos_ + anchor_pm.descent();
2464         // We are now just below the anchor paragraph.
2465         pit_type pit2 = d->anchor_pit_ + 1;
2466         for (; pit2 < npit && y2 <= height_; ++pit2) {
2467                 tm.redoParagraph(pit2);
2468                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
2469                 y2 += pm.ascent();
2470                 // Save the paragraph position in the cache.
2471                 pm.setPosition(y2);
2472                 y2 += pm.descent();
2473         }
2474
2475         LYXERR(Debug::PAINTING, "Metrics: "
2476                 << " anchor pit = " << d->anchor_pit_
2477                 << " anchor ypos = " << d->anchor_ypos_
2478                 << " y1 = " << y1
2479                 << " y2 = " << y2
2480                 << " pit1 = " << pit1
2481                 << " pit2 = " << pit2);
2482
2483         d->update_strategy_ = FullScreenUpdate;
2484
2485         if (lyxerr.debugging(Debug::WORKAREA)) {
2486                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
2487                 d->coord_cache_.dump();
2488         }
2489 }
2490
2491
2492 void BufferView::insertLyXFile(FileName const & fname)
2493 {
2494         LASSERT(d->cursor_.inTexted(), /**/);
2495
2496         // Get absolute path of file and add ".lyx"
2497         // to the filename if necessary
2498         FileName filename = fileSearch(string(), fname.absFilename(), "lyx");
2499
2500         docstring const disp_fn = makeDisplayPath(filename.absFilename());
2501         // emit message signal.
2502         message(bformat(_("Inserting document %1$s..."), disp_fn));
2503
2504         docstring res;
2505         Buffer buf("", false);
2506         if (buf.loadLyXFile(filename)) {
2507                 ErrorList & el = buffer_.errorList("Parse");
2508                 // Copy the inserted document error list into the current buffer one.
2509                 el = buf.errorList("Parse");
2510                 buffer_.undo().recordUndo(d->cursor_);
2511                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
2512                                              buf.params().documentClassPtr(), el);
2513                 res = _("Document %1$s inserted.");
2514         } else {
2515                 res = _("Could not insert document %1$s");
2516         }
2517
2518         buffer_.changed(true);
2519         // emit message signal.
2520         message(bformat(res, disp_fn));
2521         buffer_.errors("Parse");
2522 }
2523
2524
2525 Point BufferView::coordOffset(DocIterator const & dit, bool boundary) const
2526 {
2527         int x = 0;
2528         int y = 0;
2529         int lastw = 0;
2530
2531         // Addup contribution of nested insets, from inside to outside,
2532         // keeping the outer paragraph for a special handling below
2533         for (size_t i = dit.depth() - 1; i >= 1; --i) {
2534                 CursorSlice const & sl = dit[i];
2535                 int xx = 0;
2536                 int yy = 0;
2537
2538                 // get relative position inside sl.inset()
2539                 sl.inset().cursorPos(*this, sl, boundary && (i + 1 == dit.depth()), xx, yy);
2540
2541                 // Make relative position inside of the edited inset relative to sl.inset()
2542                 x += xx;
2543                 y += yy;
2544
2545                 // In case of an RTL inset, the edited inset will be positioned to the left
2546                 // of xx:yy
2547                 if (sl.text()) {
2548                         bool boundary_i = boundary && i + 1 == dit.depth();
2549                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
2550                         if (rtl)
2551                                 x -= lastw;
2552                 }
2553
2554                 // remember width for the case that sl.inset() is positioned in an RTL inset
2555                 if (i && dit[i - 1].text()) {
2556                         // If this Inset is inside a Text Inset, retrieve the Dimension
2557                         // from the containing text instead of using Inset::dimension() which
2558                         // might not be implemented.
2559                         // FIXME (Abdel 23/09/2007): this is a bit messy because of the
2560                         // elimination of Inset::dim_ cache. This coordOffset() method needs
2561                         // to be rewritten in light of the new design.
2562                         Dimension const & dim = parMetrics(dit[i - 1].text(),
2563                                 dit[i - 1].pit()).insetDimension(&sl.inset());
2564                         lastw = dim.wid;
2565                 } else {
2566                         Dimension const dim = sl.inset().dimension(*this);
2567                         lastw = dim.wid;
2568                 }
2569
2570                 //lyxerr << "Cursor::getPos, i: "
2571                 // << i << " x: " << xx << " y: " << y << endl;
2572         }
2573
2574         // Add contribution of initial rows of outermost paragraph
2575         CursorSlice const & sl = dit[0];
2576         TextMetrics const & tm = textMetrics(sl.text());
2577         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
2578         LASSERT(!pm.rows().empty(), /**/);
2579         y -= pm.rows()[0].ascent();
2580 #if 1
2581         // FIXME: document this mess
2582         size_t rend;
2583         if (sl.pos() > 0 && dit.depth() == 1) {
2584                 int pos = sl.pos();
2585                 if (pos && boundary)
2586                         --pos;
2587 //              lyxerr << "coordOffset: boundary:" << boundary << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
2588                 rend = pm.pos2row(pos);
2589         } else
2590                 rend = pm.pos2row(sl.pos());
2591 #else
2592         size_t rend = pm.pos2row(sl.pos());
2593 #endif
2594         for (size_t rit = 0; rit != rend; ++rit)
2595                 y += pm.rows()[rit].height();
2596         y += pm.rows()[rend].ascent();
2597
2598         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2599
2600         // Make relative position from the nested inset now bufferview absolute.
2601         int xx = bottom_tm.cursorX(dit.bottom(), boundary && dit.depth() == 1);
2602         x += xx;
2603
2604         // In the RTL case place the nested inset at the left of the cursor in
2605         // the outer paragraph
2606         bool boundary_1 = boundary && 1 == dit.depth();
2607         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2608         if (rtl)
2609                 x -= lastw;
2610
2611         return Point(x, y);
2612 }
2613
2614
2615 Point BufferView::getPos(DocIterator const & dit, bool boundary) const
2616 {
2617         if (!paragraphVisible(dit))
2618                 return Point(-1, -1);
2619
2620         CursorSlice const & bot = dit.bottom();
2621         TextMetrics const & tm = textMetrics(bot.text());
2622
2623         Point p = coordOffset(dit, boundary); // offset from outer paragraph
2624         p.y_ += tm.parMetrics(bot.pit()).position();
2625         return p;
2626 }
2627
2628
2629 bool BufferView::paragraphVisible(DocIterator const & dit) const
2630 {
2631         CursorSlice const & bot = dit.bottom();
2632         TextMetrics const & tm = textMetrics(bot.text());
2633
2634         return tm.contains(bot.pit());
2635 }
2636
2637
2638 void BufferView::cursorPosAndHeight(Point & p, int & h) const
2639 {
2640         Cursor const & cur = cursor();
2641         Font const font = cur.getFont();
2642         frontend::FontMetrics const & fm = theFontMetrics(font);
2643         int const asc = fm.maxAscent();
2644         int const des = fm.maxDescent();
2645         h = asc + des;
2646         p = getPos(cur, cur.boundary());
2647         p.y_ -= asc;
2648 }
2649
2650
2651 bool BufferView::cursorInView(Point const & p, int h) const
2652 {
2653         Cursor const & cur = cursor();
2654         // does the cursor touch the screen ?
2655         if (p.y_ + h < 0 || p.y_ >= workHeight() || !paragraphVisible(cur))
2656                 return false;
2657         return true;
2658 }
2659
2660
2661 void BufferView::draw(frontend::Painter & pain)
2662 {
2663         if (height_ == 0 || width_ == 0)
2664                 return;
2665         LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
2666
2667         Text & text = buffer_.text();
2668         TextMetrics const & tm = d->text_metrics_[&text];
2669         int const y = tm.first().second->position();
2670         PainterInfo pi(this, pain);
2671
2672         switch (d->update_strategy_) {
2673
2674         case NoScreenUpdate:
2675                 // If no screen painting is actually needed, only some the different
2676                 // coordinates of insets and paragraphs needs to be updated.
2677                 pi.full_repaint = true;
2678                 pi.pain.setDrawingEnabled(false);
2679                 tm.draw(pi, 0, y);
2680                 break;
2681
2682         case SingleParUpdate:
2683                 pi.full_repaint = false;
2684                 // In general, only the current row of the outermost paragraph
2685                 // will be redrawn. Particular cases where selection spans
2686                 // multiple paragraph are correctly detected in TextMetrics.
2687                 tm.draw(pi, 0, y);
2688                 break;
2689
2690         case DecorationUpdate:
2691                 // FIXME: We should also distinguish DecorationUpdate to avoid text
2692                 // drawing if possible. This is not possible to do easily right now
2693                 // because of the single backing pixmap.
2694
2695         case FullScreenUpdate:
2696                 // The whole screen, including insets, will be refreshed.
2697                 pi.full_repaint = true;
2698
2699                 // Clear background.
2700                 pain.fillRectangle(0, 0, width_, height_,
2701                         pi.backgroundColor(&buffer_.inset()));
2702
2703                 // Draw everything.
2704                 tm.draw(pi, 0, y);
2705
2706                 // and possibly grey out below
2707                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2708                 int const y2 = lastpm.second->position() + lastpm.second->descent();
2709
2710                 if (y2 < height_) {
2711                         Color color = buffer().isInternal()
2712                                 ? Color_background : Color_bottomarea;
2713                         pain.fillRectangle(0, y2, width_, height_ - y2, color);
2714                 }
2715                 break;
2716         }
2717         LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
2718
2719         // The scrollbar needs an update.
2720         updateScrollbar();
2721
2722         // Normalize anchor for next time
2723         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
2724         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2725         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
2726                 ParagraphMetrics const & pm = tm.parMetrics(pit);
2727                 if (pm.position() + pm.descent() > 0) {
2728                         d->anchor_pit_ = pit;
2729                         d->anchor_ypos_ = pm.position();
2730                         break;
2731                 }
2732         }
2733         LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
2734                 << "  anchor ypos = " << d->anchor_ypos_);
2735 }
2736
2737
2738 void BufferView::message(docstring const & msg)
2739 {
2740         if (d->gui_)
2741                 d->gui_->message(msg);
2742 }
2743
2744
2745 void BufferView::showDialog(string const & name)
2746 {
2747         if (d->gui_)
2748                 d->gui_->showDialog(name, string());
2749 }
2750
2751
2752 void BufferView::showDialog(string const & name,
2753         string const & data, Inset * inset)
2754 {
2755         if (d->gui_)
2756                 d->gui_->showDialog(name, data, inset);
2757 }
2758
2759
2760 void BufferView::updateDialog(string const & name, string const & data)
2761 {
2762         if (d->gui_)
2763                 d->gui_->updateDialog(name, data);
2764 }
2765
2766
2767 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
2768 {
2769         d->gui_ = gui;
2770 }
2771
2772
2773 // FIXME: Move this out of BufferView again
2774 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
2775 {
2776         if (!fname.isReadableFile()) {
2777                 docstring const error = from_ascii(strerror(errno));
2778                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2779                 docstring const text =
2780                   bformat(_("Could not read the specified document\n"
2781                             "%1$s\ndue to the error: %2$s"), file, error);
2782                 Alert::error(_("Could not read file"), text);
2783                 return docstring();
2784         }
2785
2786         if (!fname.isReadableFile()) {
2787                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2788                 docstring const text =
2789                   bformat(_("%1$s\n is not readable."), file);
2790                 Alert::error(_("Could not open file"), text);
2791                 return docstring();
2792         }
2793
2794         // FIXME UNICODE: We don't know the encoding of the file
2795         docstring file_content = fname.fileContents("UTF-8");
2796         if (file_content.empty()) {
2797                 Alert::error(_("Reading not UTF-8 encoded file"),
2798                              _("The file is not UTF-8 encoded.\n"
2799                                "It will be read as local 8Bit-encoded.\n"
2800                                "If this does not give the correct result\n"
2801                                "then please change the encoding of the file\n"
2802                                "to UTF-8 with a program other than LyX.\n"));
2803                 file_content = fname.fileContents("local8bit");
2804         }
2805
2806         return normalize_c(file_content);
2807 }
2808
2809
2810 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
2811 {
2812         docstring const tmpstr = contentsOfPlaintextFile(f);
2813
2814         if (tmpstr.empty())
2815                 return;
2816
2817         Cursor & cur = cursor();
2818         cap::replaceSelection(cur);
2819         buffer_.undo().recordUndo(cur);
2820         if (asParagraph)
2821                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr, cur.current_font);
2822         else
2823                 cur.innerText()->insertStringAsLines(cur, tmpstr, cur.current_font);
2824
2825         buffer_.changed(true);
2826 }
2827
2828
2829 docstring const & BufferView::inlineCompletion() const
2830 {
2831         return d->inlineCompletion_;
2832 }
2833
2834
2835 size_t const & BufferView::inlineCompletionUniqueChars() const
2836 {
2837         return d->inlineCompletionUniqueChars_;
2838 }
2839
2840
2841 DocIterator const & BufferView::inlineCompletionPos() const
2842 {
2843         return d->inlineCompletionPos_;
2844 }
2845
2846
2847 bool samePar(DocIterator const & a, DocIterator const & b)
2848 {
2849         if (a.empty() && b.empty())
2850                 return true;
2851         if (a.empty() || b.empty())
2852                 return false;
2853         if (a.depth() != b.depth())
2854                 return false;
2855         return &a.innerParagraph() == &b.innerParagraph();
2856 }
2857
2858
2859 void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
2860         docstring const & completion, size_t uniqueChars)
2861 {
2862         uniqueChars = min(completion.size(), uniqueChars);
2863         bool changed = d->inlineCompletion_ != completion
2864                 || d->inlineCompletionUniqueChars_ != uniqueChars;
2865         bool singlePar = true;
2866         d->inlineCompletion_ = completion;
2867         d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
2868
2869         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
2870
2871         // at new position?
2872         DocIterator const & old = d->inlineCompletionPos_;
2873         if (old != pos) {
2874                 //lyxerr << "inlineCompletionPos changed" << std::endl;
2875                 // old or pos are in another paragraph?
2876                 if ((!samePar(cur, pos) && !pos.empty())
2877                     || (!samePar(cur, old) && !old.empty())) {
2878                         singlePar = false;
2879                         //lyxerr << "different paragraph" << std::endl;
2880                 }
2881                 d->inlineCompletionPos_ = pos;
2882         }
2883
2884         // set update flags
2885         if (changed) {
2886                 if (singlePar && !(cur.disp_.update() & Update::Force))
2887                         cur.updateFlags(cur.disp_.update() | Update::SinglePar);
2888                 else
2889                         cur.updateFlags(cur.disp_.update() | Update::Force);
2890         }
2891 }
2892
2893 } // namespace lyx