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 "Layout.h"
  43 #include "LyXRC.h"
  44 #include "MetricsInfo.h"
  45 #include "Paragraph.h"
  46 #include "ParagraphParameters.h"
  47 #include "ParIterator.h"
  48 #include "Session.h"
  49 #include "Text.h"
  50 #include "TextClass.h"
  51 #include "TextMetrics.h"
  52 #include "TexRow.h"
  53 #include "TocBackend.h"
  54 #include "VSpace.h"
  55 #include "WordLangTuple.h"
  56
  57 #include "insets/InsetBibtex.h"
  58 #include "insets/InsetCommand.h" // ChangeRefs
  59 #include "insets/InsetExternal.h"
  60 #include "insets/InsetGraphics.h"
  61 #include "insets/InsetRef.h"
  62 #include "insets/InsetText.h"
  63 #include "insets/InsetNote.h"
  64
  65 #include "frontends/alert.h"
  66 #include "frontends/Application.h"
  67 #include "frontends/Delegates.h"
  68 #include "frontends/FontMetrics.h"
  69 #include "frontends/Painter.h"
  70 #include "frontends/Selection.h"
  71
  72 #include "graphics/Previews.h"
  73
  74 #include "support/convert.h"
  75 #include "support/debug.h"
  76 #include "support/ExceptionMessage.h"
  77 #include "support/filetools.h"
  78 #include "support/gettext.h"
  79 #include "support/lstrings.h"
  80 #include "support/Package.h"
  81 #include "support/types.h"
  82
  83 #include <cerrno>
  84 #include <fstream>
  85 #include <functional>
  86 #include <iterator>
  87 #include <sstream>
  88 #include <vector>
  89
  90 using namespace std;
  91 using namespace lyx::support;
  92
  93 namespace lyx {
  94
  95 namespace Alert = frontend::Alert;
  96
  97 namespace {
  98
  99 /// Return an inset of this class if it exists at the current cursor position
 100 template <class T>
 101 T * getInsetByCode(Cursor const & cur, InsetCode code)
 102 {
 103         DocIterator it = cur;
 104         Inset * inset = it.nextInset();
 105         if (inset && inset->lyxCode() == code)
 106                 return static_cast<T*>(inset);
 107         return 0;
 108 }
 109
 110
 111 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 112         bool same_content);
 113
 114 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 115         docstring const & contents)
 116 {
 117         DocIterator tmpdit = dit;
 118
 119         while (tmpdit) {
 120                 Inset const * inset = tmpdit.nextInset();
 121                 if (inset
 122                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()
 123                     && (contents.empty() ||
 124                     static_cast<InsetCommand const *>(inset)->getFirstNonOptParam() == contents)) {
 125                         dit = tmpdit;
 126                         return true;
 127                 }
 128                 tmpdit.forwardInset();
 129         }
 130
 131         return false;
 132 }
 133
 134
 135 /// Looks for next inset with one of the given codes.
 136 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 137         bool same_content)
 138 {
 139         docstring contents;
 140         DocIterator tmpdit = dit;
 141         tmpdit.forwardInset();
 142         if (!tmpdit)
 143                 return false;
 144
 145         if (same_content) {
 146                 Inset const * inset = tmpdit.nextInset();
 147                 if (inset
 148                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()) {
 149                         contents = static_cast<InsetCommand const *>(inset)->getFirstNonOptParam();
 150                 }
 151         }
 152
 153         if (!findNextInset(tmpdit, codes, contents)) {
 154                 if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
 155                         Inset * inset = &tmpdit.bottom().inset();
 156                         tmpdit = doc_iterator_begin(&inset->buffer(), inset);
 157                         if (!findNextInset(tmpdit, codes, contents))
 158                                 return false;
 159                 } else {
 160                         return false;
 161                 }
 162         }
 163
 164         dit = tmpdit;
 165         return true;
 166 }
 167
 168
 169 /// Looks for next inset with the given code
 170 void findInset(DocIterator & dit, InsetCode code, bool same_content)
 171 {
 172         findInset(dit, vector<InsetCode>(1, code), same_content);
 173 }
 174
 175
 176 /// Moves cursor to the next inset with one of the given codes.
 177 void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
 178                bool same_content)
 179 {
 180         Cursor tmpcur = bv->cursor();
 181         if (!findInset(tmpcur, codes, same_content)) {
 182                 bv->cursor().message(_("No more insets"));
 183                 return;
 184         }
 185
 186         tmpcur.clearSelection();
 187         bv->setCursor(tmpcur);
 188         bv->showCursor();
 189 }
 190
 191
 192 /// Moves cursor to the next inset with given code.
 193 void gotoInset(BufferView * bv, InsetCode code, bool same_content)
 194 {
 195         gotoInset(bv, vector<InsetCode>(1, code), same_content);
 196 }
 197
 198
 199 /// A map from a Text to the associated text metrics
 200 typedef map<Text const *, TextMetrics> TextMetricsCache;
 201
 202 enum ScreenUpdateStrategy {
 203         NoScreenUpdate,
 204         SingleParUpdate,
 205         FullScreenUpdate,
 206         DecorationUpdate
 207 };
 208
 209 } // anon namespace
 210
 211
 212 /////////////////////////////////////////////////////////////////////
 213 //
 214 // BufferView
 215 //
 216 /////////////////////////////////////////////////////////////////////
 217
 218 struct BufferView::Private
 219 {
 220         Private(BufferView & bv): wh_(0), cursor_(bv),
 221                 anchor_pit_(0), anchor_ypos_(0),
 222                 inlineCompletionUniqueChars_(0),
 223                 last_inset_(0), mouse_position_cache_(),
 224                 bookmark_edit_position_(-1), 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         /// position of the mouse at the time of the last mouse move
 268         /// This is used to update the hovering status of inset in
 269         /// cases where the buffer is scrolled, but the mouse didn't move.
 270         Point mouse_position_cache_;
 271
 272         // cache for id of the paragraph which was edited the last time
 273         int bookmark_edit_position_;
 274
 275         mutable TextMetricsCache text_metrics_;
 276
 277         /// Whom to notify.
 278         /** Not owned, so don't delete.
 279           */
 280         frontend::GuiBufferViewDelegate * gui_;
 281
 282         /// Cache for Find Next
 283         FuncRequest search_request_cache_;
 284
 285         ///
 286         map<string, Inset *> edited_insets_;
 287 };
 288
 289
 290 BufferView::BufferView(Buffer & buf)
 291         : width_(0), height_(0), full_screen_(false), buffer_(buf),
 292       d(new Private(*this))
 293 {
 294         d->xsel_cache_.set = false;
 295         d->intl_.initKeyMapper(lyxrc.use_kbmap);
 296
 297         d->cursor_.setBuffer(&buf);
 298         d->cursor_.push(buffer_.inset());
 299         d->cursor_.resetAnchor();
 300         d->cursor_.setCurrentFont();
 301
 302         if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 303                 thePreviews().generateBufferPreviews(buffer_);
 304 }
 305
 306
 307 BufferView::~BufferView()
 308 {
 309         // current buffer is going to be switched-off, save cursor pos
 310         // Ideally, the whole cursor stack should be saved, but session
 311         // currently can only handle bottom (whole document) level pit and pos.
 312         // That is to say, if a cursor is in a nested inset, it will be
 313         // restore to the left of the top level inset.
 314         LastFilePosSection::FilePos fp;
 315         fp.pit = d->cursor_.bottom().pit();
 316         fp.pos = d->cursor_.bottom().pos();
 317         theSession().lastFilePos().save(buffer_.fileName(), fp);
 318
 319         if (d->last_inset_)
 320                 d->last_inset_->setMouseHover(this, false);
 321
 322         delete d;
 323 }
 324
 325
 326 int BufferView::rightMargin() const
 327 {
 328         // The additional test for the case the outliner is opened.
 329         if (!full_screen_ ||
 330                 !lyxrc.full_screen_limit ||
 331                 width_ < lyxrc.full_screen_width + 20)
 332                         return 10;
 333
 334         return (width_ - lyxrc.full_screen_width) / 2;
 335 }
 336
 337
 338 int BufferView::leftMargin() const
 339 {
 340         return rightMargin();
 341 }
 342
 343
 344 bool BufferView::isTopScreen() const
 345 {
 346         return d->scrollbarParameters_.position == d->scrollbarParameters_.min;
 347 }
 348
 349
 350 bool BufferView::isBottomScreen() const
 351 {
 352         return d->scrollbarParameters_.position == d->scrollbarParameters_.max;
 353 }
 354
 355
 356 Intl & BufferView::getIntl()
 357 {
 358         return d->intl_;
 359 }
 360
 361
 362 Intl const & BufferView::getIntl() const
 363 {
 364         return d->intl_;
 365 }
 366
 367
 368 CoordCache & BufferView::coordCache()
 369 {
 370         return d->coord_cache_;
 371 }
 372
 373
 374 CoordCache const & BufferView::coordCache() const
 375 {
 376         return d->coord_cache_;
 377 }
 378
 379
 380 Buffer & BufferView::buffer()
 381 {
 382         return buffer_;
 383 }
 384
 385
 386 Buffer const & BufferView::buffer() const
 387 {
 388         return buffer_;
 389 }
 390
 391
 392 bool BufferView::fitCursor()
 393 {
 394         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
 395                 frontend::FontMetrics const & fm =
 396                         theFontMetrics(d->cursor_.getFont().fontInfo());
 397                 int const asc = fm.maxAscent();
 398                 int const des = fm.maxDescent();
 399                 Point const p = getPos(d->cursor_);
 400                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 401                         return false;
 402         }
 403         return true;
 404 }
 405
 406
 407 void BufferView::processUpdateFlags(Update::flags flags)
 408 {
 409         // This is close to a hot-path.
 410         LYXERR(Debug::DEBUG, "BufferView::processUpdateFlags()"
 411                 << "[fitcursor = " << (flags & Update::FitCursor)
 412                 << ", forceupdate = " << (flags & Update::Force)
 413                 << ", singlepar = " << (flags & Update::SinglePar)
 414                 << "]  buffer: " << &buffer_);
 415
 416         // FIXME Does this really need doing here? It's done in updateBuffer, and
 417         // if the Buffer doesn't need updating, then do the macros?
 418         buffer_.updateMacros();
 419
 420         // Now do the first drawing step if needed. This consists on updating
 421         // the CoordCache in updateMetrics().
 422         // The second drawing step is done in WorkArea::redraw() if needed.
 423
 424         // Case when no explicit update is requested.
 425         if (!flags) {
 426                 // no need to redraw anything.
 427                 d->update_strategy_ = NoScreenUpdate;
 428                 return;
 429         }
 430
 431         if (flags == Update::Decoration) {
 432                 d->update_strategy_ = DecorationUpdate;
 433                 buffer_.changed(false);
 434                 return;
 435         }
 436
 437         if (flags == Update::FitCursor
 438                 || flags == (Update::Decoration | Update::FitCursor)) {
 439                 // tell the frontend to update the screen if needed.
 440                 if (fitCursor()) {
 441                         showCursor();
 442                         return;
 443                 }
 444                 if (flags & Update::Decoration) {
 445                         d->update_strategy_ = DecorationUpdate;
 446                         buffer_.changed(false);
 447                         return;
 448                 }
 449                 // no screen update is needed.
 450                 d->update_strategy_ = NoScreenUpdate;
 451                 return;
 452         }
 453
 454         bool const full_metrics = flags & Update::Force || !singleParUpdate();
 455
 456         if (full_metrics)
 457                 // We have to update the full screen metrics.
 458                 updateMetrics();
 459
 460         if (!(flags & Update::FitCursor)) {
 461                 // Nothing to do anymore. Trigger a redraw and return
 462                 buffer_.changed(false);
 463                 return;
 464         }
 465
 466         // updateMetrics() does not update paragraph position
 467         // This is done at draw() time. So we need a redraw!
 468         buffer_.changed(false);
 469
 470         if (fitCursor()) {
 471                 // The cursor is off screen so ensure it is visible.
 472                 // refresh it:
 473                 showCursor();
 474         }
 475
 476         updateHoveredInset();
 477 }
 478
 479
 480 void BufferView::updateScrollbar()
 481 {
 482         if (height_ == 0 && width_ == 0)
 483                 return;
 484
 485         // We prefer fixed size line scrolling.
 486         d->scrollbarParameters_.single_step = defaultRowHeight();
 487         // We prefer full screen page scrolling.
 488         d->scrollbarParameters_.page_step = height_;
 489
 490         Text & t = buffer_.text();
 491         TextMetrics & tm = d->text_metrics_[&t];
 492
 493         LYXERR(Debug::GUI, " Updating scrollbar: height: "
 494                 << t.paragraphs().size()
 495                 << " curr par: " << d->cursor_.bottom().pit()
 496                 << " default height " << defaultRowHeight());
 497
 498         size_t const parsize = t.paragraphs().size();
 499         if (d->par_height_.size() != parsize) {
 500                 d->par_height_.clear();
 501                 // FIXME: We assume a default paragraph height of 2 rows. This
 502                 // should probably be pondered with the screen width.
 503                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
 504         }
 505
 506         // Look at paragraph heights on-screen
 507         pair<pit_type, ParagraphMetrics const *> first = tm.first();
 508         pair<pit_type, ParagraphMetrics const *> last = tm.last();
 509         for (pit_type pit = first.first; pit <= last.first; ++pit) {
 510                 d->par_height_[pit] = tm.parMetrics(pit).height();
 511                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
 512                         << d->par_height_[pit]);
 513         }
 514
 515         int top_pos = first.second->position() - first.second->ascent();
 516         int bottom_pos = last.second->position() + last.second->descent();
 517         bool first_visible = first.first == 0 && top_pos >= 0;
 518         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
 519         if (first_visible && last_visible) {
 520                 d->scrollbarParameters_.min = 0;
 521                 d->scrollbarParameters_.max = 0;
 522                 return;
 523         }
 524
 525         d->scrollbarParameters_.min = top_pos;
 526         for (size_t i = 0; i != size_t(first.first); ++i)
 527                 d->scrollbarParameters_.min -= d->par_height_[i];
 528         d->scrollbarParameters_.max = bottom_pos;
 529         for (size_t i = last.first + 1; i != parsize; ++i)
 530                 d->scrollbarParameters_.max += d->par_height_[i];
 531
 532         d->scrollbarParameters_.position = 0;
 533         // The reference is the top position so we remove one page.
 534         if (lyxrc.scroll_below_document)
 535                 d->scrollbarParameters_.max -= minVisiblePart();
 536         else
 537                 d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 538 }
 539
 540
 541 ScrollbarParameters const & BufferView::scrollbarParameters() const
 542 {
 543         return d->scrollbarParameters_;
 544 }
 545
 546
 547 docstring BufferView::toolTip(int x, int y) const
 548 {
 549         // Get inset under mouse, if there is one.
 550         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 551         if (!covering_inset)
 552                 // No inset, no tooltip...
 553                 return docstring();
 554         return covering_inset->toolTip(*this, x, y);
 555 }
 556
 557
 558 docstring BufferView::contextMenu(int x, int y) const
 559 {
 560         //If there is a selection, return the containing inset menu
 561         if (d->cursor_.selection())
 562                 return d->cursor_.inset().contextMenu(*this, x, y);
 563
 564         // Get inset under mouse, if there is one.
 565         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 566         if (covering_inset)
 567                 return covering_inset->contextMenu(*this, x, y);
 568
 569         return buffer_.inset().contextMenu(*this, x, y);
 570 }
 571
 572
 573 void BufferView::scrollDocView(int value, bool update)
 574 {
 575         int const offset = value - d->scrollbarParameters_.position;
 576
 577         // No scrolling at all? No need to redraw anything
 578         if (offset == 0)
 579                 return;
 580
 581         // If the offset is less than 2 screen height, prefer to scroll instead.
 582         if (abs(offset) <= 2 * height_) {
 583                 d->anchor_ypos_ -= offset;
 584                 buffer_.changed(true);
 585                 updateHoveredInset();
 586                 return;
 587         }
 588
 589         // cut off at the top
 590         if (value <= d->scrollbarParameters_.min) {
 591                 DocIterator dit = doc_iterator_begin(&buffer_);
 592                 showCursor(dit, false, update);
 593                 LYXERR(Debug::SCROLLING, "scroll to top");
 594                 return;
 595         }
 596
 597         // cut off at the bottom
 598         if (value >= d->scrollbarParameters_.max) {
 599                 DocIterator dit = doc_iterator_end(&buffer_);
 600                 dit.backwardPos();
 601                 showCursor(dit, false, update);
 602                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 603                 return;
 604         }
 605
 606         // find paragraph at target position
 607         int par_pos = d->scrollbarParameters_.min;
 608         pit_type i = 0;
 609         for (; i != int(d->par_height_.size()); ++i) {
 610                 par_pos += d->par_height_[i];
 611                 if (par_pos >= value)
 612                         break;
 613         }
 614
 615         if (par_pos < value) {
 616                 // It seems we didn't find the correct pit so stay on the safe side and
 617                 // scroll to bottom.
 618                 LYXERR0("scrolling position not found!");
 619                 scrollDocView(d->scrollbarParameters_.max, update);
 620                 return;
 621         }
 622
 623         DocIterator dit = doc_iterator_begin(&buffer_);
 624         dit.pit() = i;
 625         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 626         showCursor(dit, false, update);
 627 }
 628
 629
 630 // FIXME: this method is not working well.
 631 void BufferView::setCursorFromScrollbar()
 632 {
 633         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 634
 635         int const height = 2 * defaultRowHeight();
 636         int const first = height;
 637         int const last = height_ - height;
 638         int newy = 0;
 639         Cursor const & oldcur = d->cursor_;
 640
 641         switch (cursorStatus(oldcur)) {
 642         case CUR_ABOVE:
 643                 newy = first;
 644                 break;
 645         case CUR_BELOW:
 646                 newy = last;
 647                 break;
 648         case CUR_INSIDE:
 649                 int const y = getPos(oldcur).y_;
 650                 newy = min(last, max(y, first));
 651                 if (y == newy)
 652                         return;
 653         }
 654         // We reset the cursor because cursorStatus() does not
 655         // work when the cursor is within mathed.
 656         Cursor cur(*this);
 657         cur.reset();
 658         tm.setCursorFromCoordinates(cur, 0, newy);
 659
 660         // update the bufferview cursor and notify insets
 661         // FIXME: Care about the d->cursor_ flags to redraw if needed
 662         Cursor old = d->cursor_;
 663         mouseSetCursor(cur);
 664         bool badcursor = notifyCursorLeavesOrEnters(old, d->cursor_);
 665         if (badcursor)
 666                 d->cursor_.fixIfBroken();
 667 }
 668
 669
 670 Change const BufferView::getCurrentChange() const
 671 {
 672         if (!d->cursor_.selection())
 673                 return Change(Change::UNCHANGED);
 674
 675         DocIterator dit = d->cursor_.selectionBegin();
 676         return dit.paragraph().lookupChange(dit.pos());
 677 }
 678
 679
 680 // this could be used elsewhere as well?
 681 // FIXME: This does not work within mathed!
 682 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 683 {
 684         Point const p = getPos(dit);
 685         if (p.y_ < 0)
 686                 return CUR_ABOVE;
 687         if (p.y_ > workHeight())
 688                 return CUR_BELOW;
 689         return CUR_INSIDE;
 690 }
 691
 692
 693 void BufferView::bookmarkEditPosition()
 694 {
 695         // Don't eat cpu time for each keystroke
 696         if (d->cursor_.paragraph().id() == d->bookmark_edit_position_)
 697                 return;
 698         saveBookmark(0);
 699         d->bookmark_edit_position_ = d->cursor_.paragraph().id();
 700 }
 701
 702
 703 void BufferView::saveBookmark(unsigned int idx)
 704 {
 705         // tentatively save bookmark, id and pos will be used to
 706         // acturately locate a bookmark in a 'live' lyx session.
 707         // pit and pos will be updated with bottom level pit/pos
 708         // when lyx exits.
 709         if (!buffer_.isInternal()) {
 710                 theSession().bookmarks().save(
 711                         buffer_.fileName(),
 712                         d->cursor_.bottom().pit(),
 713                         d->cursor_.bottom().pos(),
 714                         d->cursor_.paragraph().id(),
 715                         d->cursor_.pos(),
 716                         idx
 717                         );
 718                 if (idx)
 719                         // emit message signal.
 720                         message(_("Save bookmark"));
 721         }
 722 }
 723
 724
 725 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 726         int top_id, pos_type top_pos)
 727 {
 728         bool success = false;
 729         DocIterator dit;
 730
 731         d->cursor_.clearSelection();
 732
 733         // if a valid par_id is given, try it first
 734         // This is the case for a 'live' bookmark when unique paragraph ID
 735         // is used to track bookmarks.
 736         if (top_id > 0) {
 737                 dit = buffer_.getParFromID(top_id);
 738                 if (!dit.atEnd()) {
 739                         dit.pos() = min(dit.paragraph().size(), top_pos);
 740                         // Some slices of the iterator may not be
 741                         // reachable (e.g. closed collapsable inset)
 742                         // so the dociterator may need to be
 743                         // shortened. Otherwise, setCursor may crash
 744                         // lyx when the cursor can not be set to these
 745                         // insets.
 746                         size_t const n = dit.depth();
 747                         for (size_t i = 0; i < n; ++i)
 748                                 if (!dit[i].inset().editable()) {
 749                                         dit.resize(i);
 750                                         break;
 751                                 }
 752                         success = true;
 753                 }
 754         }
 755
 756         // if top_id == 0, or searching through top_id failed
 757         // This is the case for a 'restored' bookmark when only bottom
 758         // (document level) pit was saved. Because of this, bookmark
 759         // restoration is inaccurate. If a bookmark was within an inset,
 760         // it will be restored to the left of the outmost inset that contains
 761         // the bookmark.
 762         if (bottom_pit < int(buffer_.paragraphs().size())) {
 763                 dit = doc_iterator_begin(&buffer_);
 764
 765                 dit.pit() = bottom_pit;
 766                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 767                 success = true;
 768         }
 769
 770         if (success) {
 771                 // Note: only bottom (document) level pit is set.
 772                 setCursor(dit);
 773                 // set the current font.
 774                 d->cursor_.setCurrentFont();
 775                 // To center the screen on this new position we need the
 776                 // paragraph position which is computed at draw() time.
 777                 // So we need a redraw!
 778                 buffer_.changed(false);
 779                 if (fitCursor())
 780                         showCursor();
 781         }
 782
 783         return success;
 784 }
 785
 786
 787 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 788 {
 789         if (lyxrc.rtl_support) {
 790                 if (d->cursor_.real_current_font.isRightToLeft()) {
 791                         if (d->intl_.keymap == Intl::PRIMARY)
 792                                 d->intl_.keyMapSec();
 793                 } else {
 794                         if (d->intl_.keymap == Intl::SECONDARY)
 795                                 d->intl_.keyMapPrim();
 796                 }
 797         }
 798
 799         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 800 }
 801
 802
 803 int BufferView::workWidth() const
 804 {
 805         return width_;
 806 }
 807
 808
 809 void BufferView::recenter()
 810 {
 811         showCursor(d->cursor_, true, true);
 812 }
 813
 814
 815 void BufferView::showCursor()
 816 {
 817         showCursor(d->cursor_, false, true);
 818 }
 819
 820
 821 void BufferView::showCursor(DocIterator const & dit,
 822         bool recenter, bool update)
 823 {
 824         if (scrollToCursor(dit, recenter) && update) {
 825                 buffer_.changed(true);
 826                 updateHoveredInset();
 827         }
 828 }
 829
 830
 831 void BufferView::scrollToCursor()
 832 {
 833         if (scrollToCursor(d->cursor_, false)) {
 834                 buffer_.changed(true);
 835                 updateHoveredInset();
 836         }
 837 }
 838
 839
 840 bool BufferView::scrollToCursor(DocIterator const & dit, bool recenter)
 841 {
 842         // We are not properly started yet, delay until resizing is
 843         // done.
 844         if (height_ == 0)
 845                 return false;
 846
 847         LYXERR(Debug::SCROLLING, "recentering!");
 848
 849         CursorSlice const & bot = dit.bottom();
 850         TextMetrics & tm = d->text_metrics_[bot.text()];
 851
 852         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 853         int bot_pit = bot.pit();
 854         if (bot_pit > max_pit) {
 855                 // FIXME: Why does this happen?
 856                 LYXERR0("bottom pit is greater that max pit: "
 857                         << bot_pit << " > " << max_pit);
 858                 bot_pit = max_pit;
 859         }
 860
 861         if (bot_pit == tm.first().first - 1)
 862                 tm.newParMetricsUp();
 863         else if (bot_pit == tm.last().first + 1)
 864                 tm.newParMetricsDown();
 865
 866         if (tm.contains(bot_pit)) {
 867                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 868                 LASSERT(!pm.rows().empty(), /**/);
 869                 // FIXME: smooth scrolling doesn't work in mathed.
 870                 CursorSlice const & cs = dit.innerTextSlice();
 871                 int offset = coordOffset(dit).y_;
 872                 int ypos = pm.position() + offset;
 873                 Dimension const & row_dim =
 874                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 875                 int scrolled = 0;
 876                 if (recenter)
 877                         scrolled = scroll(ypos - height_/2);
 878
 879                 // If the top part of the row falls of the screen, we scroll
 880                 // up to align the top of the row with the top of the screen.
 881                 else if (ypos - row_dim.ascent() < 0)
 882                         scrolled = scrollUp(-ypos + row_dim.ascent());
 883
 884                 // If the bottom of the row falls of the screen, we scroll down.
 885                 // However, we have to be careful not to scroll that much that
 886                 // the top falls of the screen.
 887                 else if (ypos + row_dim.descent() > height_) {
 888                         int ynew = height_ - row_dim.descent();
 889                         if (ynew < row_dim.ascent())
 890                                 ynew = row_dim.ascent();
 891                         int const scroll = ypos - ynew;
 892                         scrolled = scrollDown(scroll);
 893                 }
 894
 895                 // else, nothing to do, the cursor is already visible so we just return.
 896                 return scrolled != 0;
 897         }
 898
 899         // fix inline completion position
 900         if (d->inlineCompletionPos_.fixIfBroken())
 901                 d->inlineCompletionPos_ = DocIterator();
 902
 903         tm.redoParagraph(bot_pit);
 904         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 905         int offset = coordOffset(dit).y_;
 906
 907         d->anchor_pit_ = bot_pit;
 908         CursorSlice const & cs = dit.innerTextSlice();
 909         Dimension const & row_dim =
 910                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 911
 912         if (recenter)
 913                 d->anchor_ypos_ = height_/2;
 914         else if (d->anchor_pit_ == 0)
 915                 d->anchor_ypos_ = offset + pm.ascent();
 916         else if (d->anchor_pit_ == max_pit)
 917                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
 918         else if (offset > height_)
 919                 d->anchor_ypos_ = height_ - offset - defaultRowHeight();
 920         else
 921                 d->anchor_ypos_ = defaultRowHeight() * 2;
 922
 923         return true;
 924 }
 925
 926
 927 void BufferView::updateDocumentClass(DocumentClass const * const olddc)
 928 {
 929         message(_("Converting document to new document class..."));
 930
 931         StableDocIterator backcur(d->cursor_);
 932         ErrorList & el = buffer_.errorList("Class Switch");
 933         cap::switchBetweenClasses(
 934                         olddc, buffer_.params().documentClassPtr(),
 935                         static_cast<InsetText &>(buffer_.inset()), el);
 936
 937         setCursor(backcur.asDocIterator(&buffer_));
 938
 939         buffer_.errors("Class Switch");
 940 }
 941
 942 /** Return the change status at cursor position, taking in account the
 943  * status at each level of the document iterator (a table in a deleted
 944  * footnote is deleted).
 945  * When \param outer is true, the top slice is not looked at.
 946  */
 947 static Change::Type lookupChangeType(DocIterator const & dit, bool outer = false)
 948 {
 949         size_t const depth = dit.depth() - (outer ? 1 : 0);
 950
 951         for (size_t i = 0 ; i < depth ; ++i) {
 952                 CursorSlice const & slice = dit[i];
 953                 if (!slice.inset().inMathed()
 954                     && slice.pos() < slice.paragraph().size()) {
 955                         Change::Type const ch = slice.paragraph().lookupChange(slice.pos()).type;
 956                         if (ch != Change::UNCHANGED)
 957                                 return ch;
 958                 }
 959         }
 960         return Change::UNCHANGED;
 961 }
 962
 963
 964 bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
 965 {
 966         FuncCode const act = cmd.action();
 967
 968         // Can we use a readonly buffer?
 969         if (buffer_.isReadonly()
 970             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
 971             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
 972                 flag.message(from_utf8(N_("Document is read-only")));
 973                 flag.setEnabled(false);
 974                 return true;
 975         }
 976
 977         // Are we in a DELETED change-tracking region?
 978         if (lookupChangeType(d->cursor_, true) == Change::DELETED
 979             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
 980             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
 981                 flag.message(from_utf8(N_("This portion of the document is deleted.")));
 982                 flag.setEnabled(false);
 983                 return true;
 984         }
 985
 986         Cursor & cur = d->cursor_;
 987
 988         if (cur.getStatus(cmd, flag))
 989                 return true;
 990
 991         switch (act) {
 992
 993         // FIXME: This is a bit problematic because we don't check if this is
 994         // a document BufferView or not for these LFUNs. We probably have to
 995         // dispatch both to currentBufferView() and, if that fails,
 996         // to documentBufferView(); same as we do now for current Buffer and
 997         // document Buffer. Ideally those LFUN should go to Buffer as they
 998         // operate on the full Buffer and the cursor is only needed either for
 999         // an Undo record or to restore a cursor position. But we don't know
1000         // how to do that inside Buffer of course.
1001         case LFUN_BUFFER_PARAMS_APPLY:
1002         case LFUN_LAYOUT_MODULES_CLEAR:
1003         case LFUN_LAYOUT_MODULE_ADD:
1004         case LFUN_LAYOUT_RELOAD:
1005         case LFUN_TEXTCLASS_APPLY:
1006         case LFUN_TEXTCLASS_LOAD:
1007                 flag.setEnabled(!buffer_.isReadonly());
1008                 break;
1009
1010         case LFUN_UNDO:
1011                 // We do not use the LyXAction flag for readonly because Undo sets the
1012                 // buffer clean/dirty status by itself.
1013                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasUndoStack());
1014                 break;
1015         case LFUN_REDO:
1016                 // We do not use the LyXAction flag for readonly because Redo sets the
1017                 // buffer clean/dirty status by itself.
1018                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasRedoStack());
1019                 break;
1020         case LFUN_FILE_INSERT:
1021         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
1022         case LFUN_FILE_INSERT_PLAINTEXT:
1023         case LFUN_BOOKMARK_SAVE:
1024                 // FIXME: Actually, these LFUNS should be moved to Text
1025                 flag.setEnabled(cur.inTexted());
1026                 break;
1027
1028         case LFUN_FONT_STATE:
1029         case LFUN_LABEL_INSERT:
1030         case LFUN_INFO_INSERT:
1031         case LFUN_PARAGRAPH_GOTO:
1032         case LFUN_NOTE_NEXT:
1033         case LFUN_REFERENCE_NEXT:
1034         case LFUN_WORD_FIND:
1035         case LFUN_WORD_FIND_FORWARD:
1036         case LFUN_WORD_FIND_BACKWARD:
1037         case LFUN_WORD_FINDADV:
1038         case LFUN_WORD_REPLACE:
1039         case LFUN_MARK_OFF:
1040         case LFUN_MARK_ON:
1041         case LFUN_MARK_TOGGLE:
1042         case LFUN_SCREEN_RECENTER:
1043         case LFUN_SCREEN_SHOW_CURSOR:
1044         case LFUN_BIBTEX_DATABASE_ADD:
1045         case LFUN_BIBTEX_DATABASE_DEL:
1046         case LFUN_STATISTICS:
1047         case LFUN_BRANCH_ADD_INSERT:
1048         case LFUN_KEYMAP_OFF:
1049         case LFUN_KEYMAP_PRIMARY:
1050         case LFUN_KEYMAP_SECONDARY:
1051         case LFUN_KEYMAP_TOGGLE:
1052                 flag.setEnabled(true);
1053                 break;
1054
1055         case LFUN_LABEL_GOTO: {
1056                 flag.setEnabled(!cmd.argument().empty()
1057                     || getInsetByCode<InsetRef>(cur, REF_CODE));
1058                 break;
1059         }
1060
1061         case LFUN_CHANGES_TRACK:
1062                 flag.setEnabled(true);
1063                 flag.setOnOff(buffer_.params().trackChanges);
1064                 break;
1065
1066         case LFUN_CHANGES_OUTPUT:
1067                 flag.setEnabled(true);
1068                 flag.setOnOff(buffer_.params().outputChanges);
1069                 break;
1070
1071         case LFUN_CHANGES_MERGE:
1072         case LFUN_CHANGE_NEXT:
1073         case LFUN_CHANGE_PREVIOUS:
1074         case LFUN_ALL_CHANGES_ACCEPT:
1075         case LFUN_ALL_CHANGES_REJECT:
1076                 // TODO: context-sensitive enabling of LFUNs
1077                 // In principle, these command should only be enabled if there
1078                 // is a change in the document. However, without proper
1079                 // optimizations, this will inevitably result in poor performance.
1080                 flag.setEnabled(true);
1081                 break;
1082
1083         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
1084                 flag.setOnOff(buffer_.params().compressed);
1085                 break;
1086         }
1087
1088         case LFUN_BUFFER_TOGGLE_OUTPUT_SYNC: {
1089                 flag.setOnOff(buffer_.params().output_sync);
1090                 break;
1091         }
1092
1093         case LFUN_SCREEN_UP:
1094         case LFUN_SCREEN_DOWN:
1095         case LFUN_SCROLL:
1096         case LFUN_SCREEN_UP_SELECT:
1097         case LFUN_SCREEN_DOWN_SELECT:
1098         case LFUN_INSET_FORALL:
1099                 flag.setEnabled(true);
1100                 break;
1101
1102         case LFUN_LAYOUT_TABULAR:
1103                 flag.setEnabled(cur.innerInsetOfType(TABULAR_CODE));
1104                 break;
1105
1106         case LFUN_LAYOUT:
1107                 flag.setEnabled(!cur.inset().forcePlainLayout(cur.idx()));
1108                 break;
1109
1110         case LFUN_LAYOUT_PARAGRAPH:
1111                 flag.setEnabled(cur.inset().allowParagraphCustomization(cur.idx()));
1112                 break;
1113
1114         case LFUN_DIALOG_SHOW_NEW_INSET:
1115                 // FIXME: this is wrong, but I do not understand the
1116                 // intent (JMarc)
1117                 if (cur.inset().lyxCode() == CAPTION_CODE)
1118                         return cur.inset().getStatus(cur, cmd, flag);
1119                 // FIXME we should consider passthru paragraphs too.
1120                 flag.setEnabled(!cur.inset().getLayout().isPassThru());
1121                 break;
1122
1123         case LFUN_CITATION_INSERT: {
1124                 FuncRequest fr(LFUN_INSET_INSERT, "citation");
1125                 // FIXME: This could turn in a recursive hell.
1126                 // Shouldn't we use Buffer::getStatus() instead?
1127                 flag.setEnabled(lyx::getStatus(fr).enabled());
1128                 break;
1129         }
1130         case LFUN_INSET_APPLY: {
1131                 string const name = cmd.getArg(0);
1132                 Inset * inset = editedInset(name);
1133                 if (inset) {
1134                         FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1135                         if (!inset->getStatus(cur, fr, flag)) {
1136                                 // Every inset is supposed to handle this
1137                                 LASSERT(false, break);
1138                         }
1139                 } else {
1140                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1141                         flag = lyx::getStatus(fr);
1142                 }
1143                 break;
1144         }
1145
1146         default:
1147                 return false;
1148         }
1149
1150         return true;
1151 }
1152
1153
1154 Inset * BufferView::editedInset(string const & name) const
1155 {
1156         map<string, Inset *>::const_iterator it = d->edited_insets_.find(name);
1157         return it == d->edited_insets_.end() ? 0 : it->second;
1158 }
1159
1160
1161 void BufferView::editInset(string const & name, Inset * inset)
1162 {
1163         d->edited_insets_[name] = inset;
1164 }
1165
1166
1167 void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
1168 {
1169         //lyxerr << [ cmd = " << cmd << "]" << endl;
1170
1171         // Make sure that the cached BufferView is correct.
1172         LYXERR(Debug::ACTION, " action[" << cmd.action() << ']'
1173                 << " arg[" << to_utf8(cmd.argument()) << ']'
1174                 << " x[" << cmd.x() << ']'
1175                 << " y[" << cmd.y() << ']'
1176                 << " button[" << cmd.button() << ']');
1177
1178         string const argument = to_utf8(cmd.argument());
1179         Cursor & cur = d->cursor_;
1180
1181         // Don't dispatch function that does not apply to internal buffers.
1182         if (buffer_.isInternal()
1183             && lyxaction.funcHasFlag(cmd.action(), LyXAction::NoInternal))
1184                 return;
1185
1186         // We'll set this back to false if need be.
1187         bool dispatched = true;
1188         buffer_.undo().beginUndoGroup();
1189
1190         FuncCode const act = cmd.action();
1191         switch (act) {
1192
1193         case LFUN_BUFFER_PARAMS_APPLY: {
1194                 DocumentClass const * const oldClass = buffer_.params().documentClassPtr();
1195                 cur.recordUndoFullDocument();
1196                 istringstream ss(to_utf8(cmd.argument()));
1197                 Lexer lex;
1198                 lex.setStream(ss);
1199                 int const unknown_tokens = buffer_.readHeader(lex);
1200                 if (unknown_tokens != 0) {
1201                         LYXERR0("Warning in LFUN_BUFFER_PARAMS_APPLY!\n"
1202                                                 << unknown_tokens << " unknown token"
1203                                                 << (unknown_tokens == 1 ? "" : "s"));
1204                 }
1205                 updateDocumentClass(oldClass);
1206
1207                 // We are most certainly here because of a change in the document
1208                 // It is then better to make sure that all dialogs are in sync with
1209                 // current document settings.
1210                 dr.screenUpdate(Update::Force | Update::FitCursor);
1211                 dr.forceBufferUpdate();
1212                 break;
1213         }
1214
1215         case LFUN_LAYOUT_MODULES_CLEAR: {
1216                 DocumentClass const * const oldClass =
1217                         buffer_.params().documentClassPtr();
1218                 cur.recordUndoFullDocument();
1219                 buffer_.params().clearLayoutModules();
1220                 buffer_.params().makeDocumentClass();
1221                 updateDocumentClass(oldClass);
1222                 dr.screenUpdate(Update::Force);
1223                 dr.forceBufferUpdate();
1224                 break;
1225         }
1226
1227         case LFUN_LAYOUT_MODULE_ADD: {
1228                 BufferParams const & params = buffer_.params();
1229                 if (!params.moduleCanBeAdded(argument)) {
1230                         LYXERR0("Module `" << argument <<
1231                                 "' cannot be added due to failed requirements or "
1232                                 "conflicts with installed modules.");
1233                         break;
1234                 }
1235                 DocumentClass const * const oldClass = params.documentClassPtr();
1236                 cur.recordUndoFullDocument();
1237                 buffer_.params().addLayoutModule(argument);
1238                 buffer_.params().makeDocumentClass();
1239                 updateDocumentClass(oldClass);
1240                 dr.screenUpdate(Update::Force);
1241                 dr.forceBufferUpdate();
1242                 break;
1243         }
1244
1245         case LFUN_TEXTCLASS_APPLY: {
1246                 // since this shortcircuits, the second call is made only if
1247                 // the first fails
1248                 bool const success =
1249                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1250                         LayoutFileList::get().load(argument, buffer_.filePath());
1251                 if (!success) {
1252                         docstring s = bformat(_("The document class `%1$s' "
1253                                                  "could not be loaded."), from_utf8(argument));
1254                         frontend::Alert::error(_("Could not load class"), s);
1255                         break;
1256                 }
1257
1258                 LayoutFile const * old_layout = buffer_.params().baseClass();
1259                 LayoutFile const * new_layout = &(LayoutFileList::get()[argument]);
1260
1261                 if (old_layout == new_layout)
1262                         // nothing to do
1263                         break;
1264
1265                 // Save the old, possibly modular, layout for use in conversion.
1266                 DocumentClass const * const oldDocClass =
1267                         buffer_.params().documentClassPtr();
1268                 cur.recordUndoFullDocument();
1269                 buffer_.params().setBaseClass(argument);
1270                 buffer_.params().makeDocumentClass();
1271                 updateDocumentClass(oldDocClass);
1272                 dr.screenUpdate(Update::Force);
1273                 dr.forceBufferUpdate();
1274                 break;
1275         }
1276
1277         case LFUN_TEXTCLASS_LOAD: {
1278                 // since this shortcircuits, the second call is made only if
1279                 // the first fails
1280                 bool const success =
1281                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1282                         LayoutFileList::get().load(argument, buffer_.filePath());
1283                 if (!success) {
1284                         docstring s = bformat(_("The document class `%1$s' "
1285                                                  "could not be loaded."), from_utf8(argument));
1286                         frontend::Alert::error(_("Could not load class"), s);
1287                 }
1288                 break;
1289         }
1290
1291         case LFUN_LAYOUT_RELOAD: {
1292                 DocumentClass const * const oldClass = buffer_.params().documentClassPtr();
1293                 LayoutFileIndex bc = buffer_.params().baseClassID();
1294                 LayoutFileList::get().reset(bc);
1295                 buffer_.params().setBaseClass(bc);
1296                 buffer_.params().makeDocumentClass();
1297                 updateDocumentClass(oldClass);
1298                 dr.screenUpdate(Update::Force);
1299                 dr.forceBufferUpdate();
1300                 break;
1301         }
1302
1303         case LFUN_UNDO:
1304                 dr.setMessage(_("Undo"));
1305                 cur.clearSelection();
1306                 if (!cur.textUndo())
1307                         dr.setMessage(_("No further undo information"));
1308                 else
1309                         dr.screenUpdate(Update::Force | Update::FitCursor);
1310                 dr.forceBufferUpdate();
1311                 break;
1312
1313         case LFUN_REDO:
1314                 dr.setMessage(_("Redo"));
1315                 cur.clearSelection();
1316                 if (!cur.textRedo())
1317                         dr.setMessage(_("No further redo information"));
1318                 else
1319                         dr.screenUpdate(Update::Force | Update::FitCursor);
1320                 dr.forceBufferUpdate();
1321                 break;
1322
1323         case LFUN_FONT_STATE:
1324                 dr.setMessage(cur.currentState());
1325                 break;
1326
1327         case LFUN_BOOKMARK_SAVE:
1328                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1329                 break;
1330
1331         case LFUN_LABEL_GOTO: {
1332                 docstring label = cmd.argument();
1333                 if (label.empty()) {
1334                         InsetRef * inset =
1335                                 getInsetByCode<InsetRef>(cur, REF_CODE);
1336                         if (inset) {
1337                                 label = inset->getParam("reference");
1338                                 // persistent=false: use temp_bookmark
1339                                 saveBookmark(0);
1340                         }
1341                 }
1342                 if (!label.empty()) {
1343                         gotoLabel(label);
1344                         // at the moment, this is redundant, since gotoLabel will
1345                         // eventually call LFUN_PARAGRAPH_GOTO, but it seems best
1346                         // to have it here.
1347                         dr.screenUpdate(Update::Force | Update::FitCursor);
1348                 }
1349                 break;
1350         }
1351
1352         case LFUN_PARAGRAPH_GOTO: {
1353                 int const id = convert<int>(cmd.getArg(0));
1354                 int const pos = convert<int>(cmd.getArg(1));
1355                 int i = 0;
1356                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1357                         b = theBufferList().next(b)) {
1358
1359                         DocIterator dit = b->getParFromID(id);
1360                         if (dit.atEnd()) {
1361                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1362                                 ++i;
1363                                 continue;
1364                         }
1365                         LYXERR(Debug::INFO, "Paragraph " << dit.paragraph().id()
1366                                 << " found in buffer `"
1367                                 << b->absFileName() << "'.");
1368
1369                         if (b == &buffer_) {
1370                                 // Set the cursor
1371                                 dit.pos() = pos;
1372                                 setCursor(dit);
1373                                 dr.screenUpdate(Update::Force | Update::FitCursor);
1374                         } else {
1375                                 // Switch to other buffer view and resend cmd
1376                                 lyx::dispatch(FuncRequest(
1377                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1378                                 lyx::dispatch(cmd);
1379                         }
1380                         break;
1381                 }
1382                 break;
1383         }
1384
1385         case LFUN_NOTE_NEXT:
1386                 gotoInset(this, NOTE_CODE, false);
1387                 break;
1388
1389         case LFUN_REFERENCE_NEXT: {
1390                 vector<InsetCode> tmp;
1391                 tmp.push_back(LABEL_CODE);
1392                 tmp.push_back(REF_CODE);
1393                 gotoInset(this, tmp, true);
1394                 break;
1395         }
1396
1397         case LFUN_CHANGES_TRACK:
1398                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
1399                 break;
1400
1401         case LFUN_CHANGES_OUTPUT:
1402                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
1403                 if (buffer_.params().outputChanges) {
1404                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
1405                         bool xcolorulem = LaTeXFeatures::isAvailable("ulem") &&
1406                                           LaTeXFeatures::isAvailable("xcolor");
1407
1408                         if (!dvipost && !xcolorulem) {
1409                                 Alert::warning(_("Changes not shown in LaTeX output"),
1410                                                _("Changes will not be highlighted in LaTeX output, "
1411                                                  "because neither dvipost nor xcolor/ulem are installed.\n"
1412                                                  "Please install these packages or redefine "
1413                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1414                         } else if (!xcolorulem) {
1415                                 Alert::warning(_("Changes not shown in LaTeX output"),
1416                                                _("Changes will not be highlighted in LaTeX output "
1417                                                  "when using pdflatex, because xcolor and ulem are not installed.\n"
1418                                                  "Please install both packages or redefine "
1419                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1420                         }
1421                 }
1422                 break;
1423
1424         case LFUN_CHANGE_NEXT:
1425                 findNextChange(this);
1426                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1427                 dr.screenUpdate(Update::Force | Update::FitCursor);
1428                 break;
1429
1430         case LFUN_CHANGE_PREVIOUS:
1431                 findPreviousChange(this);
1432                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1433                 dr.screenUpdate(Update::Force | Update::FitCursor);
1434                 break;
1435
1436         case LFUN_CHANGES_MERGE:
1437                 if (findNextChange(this) || findPreviousChange(this)) {
1438                         dr.screenUpdate(Update::Force | Update::FitCursor);
1439                         dr.forceBufferUpdate();
1440                         showDialog("changes");
1441                 }
1442                 break;
1443
1444         case LFUN_ALL_CHANGES_ACCEPT:
1445                 // select complete document
1446                 cur.reset();
1447                 cur.selHandle(true);
1448                 buffer_.text().cursorBottom(cur);
1449                 // accept everything in a single step to support atomic undo
1450                 buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
1451                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1452                 dr.screenUpdate(Update::Force | Update::FitCursor);
1453                 dr.forceBufferUpdate();
1454                 break;
1455
1456         case LFUN_ALL_CHANGES_REJECT:
1457                 // select complete document
1458                 cur.reset();
1459                 cur.selHandle(true);
1460                 buffer_.text().cursorBottom(cur);
1461                 // reject everything in a single step to support atomic undo
1462                 // Note: reject does not work recursively; the user may have to repeat the operation
1463                 buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
1464                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1465                 dr.screenUpdate(Update::Force | Update::FitCursor);
1466                 dr.forceBufferUpdate();
1467                 break;
1468
1469         case LFUN_WORD_FIND_FORWARD:
1470         case LFUN_WORD_FIND_BACKWARD: {
1471                 static docstring last_search;
1472                 docstring searched_string;
1473
1474                 if (!cmd.argument().empty()) {
1475                         last_search = cmd.argument();
1476                         searched_string = cmd.argument();
1477                 } else {
1478                         searched_string = last_search;
1479                 }
1480
1481                 if (searched_string.empty())
1482                         break;
1483
1484                 bool const fw = act == LFUN_WORD_FIND_FORWARD;
1485                 docstring const data =
1486                         find2string(searched_string, true, false, fw);
1487                 bool found = lyxfind(this, FuncRequest(LFUN_WORD_FIND, data));
1488                 if (found)
1489                         dr.screenUpdate(Update::Force | Update::FitCursor);
1490                 break;
1491         }
1492
1493         case LFUN_WORD_FIND: {
1494                 FuncRequest req = cmd;
1495                 if (cmd.argument().empty() && !d->search_request_cache_.argument().empty())
1496                         req = d->search_request_cache_;
1497                 if (req.argument().empty()) {
1498                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
1499                         break;
1500                 }
1501                 if (lyxfind(this, req))
1502                         dr.screenUpdate(Update::Force | Update::FitCursor);
1503                 else
1504                         message(_("String not found!"));
1505                 d->search_request_cache_ = req;
1506                 break;
1507         }
1508
1509         case LFUN_WORD_REPLACE: {
1510                 bool has_deleted = false;
1511                 if (cur.selection()) {
1512                         DocIterator beg = cur.selectionBegin();
1513                         DocIterator end = cur.selectionEnd();
1514                         if (beg.pit() == end.pit()) {
1515                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1516                                         if (!cur.inMathed() && cur.paragraph().isDeleted(p)) {
1517                                                 has_deleted = true;
1518                                                 break;
1519                                         }
1520                                 }
1521                         }
1522                 }
1523                 if (lyxreplace(this, cmd, has_deleted)) {
1524                         dr.forceBufferUpdate();
1525                         dr.screenUpdate(Update::Force | Update::FitCursor);
1526                 }
1527                 break;
1528         }
1529
1530         case LFUN_WORD_FINDADV: {
1531                 FindAndReplaceOptions opt;
1532                 istringstream iss(to_utf8(cmd.argument()));
1533                 iss >> opt;
1534                 if (findAdv(this, opt))
1535                         cur.dispatched();
1536                 else
1537                         cur.undispatched();
1538                 break;
1539         }
1540
1541         case LFUN_MARK_OFF:
1542                 cur.clearSelection();
1543                 dr.setMessage(from_utf8(N_("Mark off")));
1544                 break;
1545
1546         case LFUN_MARK_ON:
1547                 cur.clearSelection();
1548                 cur.setMark(true);
1549                 dr.setMessage(from_utf8(N_("Mark on")));
1550                 break;
1551
1552         case LFUN_MARK_TOGGLE:
1553                 cur.setSelection(false);
1554                 if (cur.mark()) {
1555                         cur.setMark(false);
1556                         dr.setMessage(from_utf8(N_("Mark removed")));
1557                 } else {
1558                         cur.setMark(true);
1559                         dr.setMessage(from_utf8(N_("Mark set")));
1560                 }
1561                 cur.resetAnchor();
1562                 break;
1563
1564         case LFUN_SCREEN_SHOW_CURSOR:
1565                 showCursor();
1566                 break;
1567
1568         case LFUN_SCREEN_RECENTER:
1569                 recenter();
1570                 break;
1571
1572         case LFUN_BIBTEX_DATABASE_ADD: {
1573                 Cursor tmpcur = cur;
1574                 findInset(tmpcur, BIBTEX_CODE, false);
1575                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1576                                                 BIBTEX_CODE);
1577                 if (inset) {
1578                         if (inset->addDatabase(cmd.argument())) {
1579                                 buffer_.invalidateBibfileCache();
1580                                 dr.forceBufferUpdate();
1581                         }
1582                 }
1583                 break;
1584         }
1585
1586         case LFUN_BIBTEX_DATABASE_DEL: {
1587                 Cursor tmpcur = cur;
1588                 findInset(tmpcur, BIBTEX_CODE, false);
1589                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1590                                                 BIBTEX_CODE);
1591                 if (inset) {
1592                         if (inset->delDatabase(cmd.argument())) {
1593                                 buffer_.invalidateBibfileCache();
1594                                 dr.forceBufferUpdate();
1595                         }
1596                 }
1597                 break;
1598         }
1599
1600         case LFUN_STATISTICS: {
1601                 DocIterator from, to;
1602                 if (cur.selection()) {
1603                         from = cur.selectionBegin();
1604                         to = cur.selectionEnd();
1605                 } else {
1606                         from = doc_iterator_begin(&buffer_);
1607                         to = doc_iterator_end(&buffer_);
1608                 }
1609                 int const words = countWords(from, to);
1610                 int const chars = countChars(from, to, false);
1611                 int const chars_blanks = countChars(from, to, true);
1612                 docstring message;
1613                 if (cur.selection())
1614                         message = _("Statistics for the selection:");
1615                 else
1616                         message = _("Statistics for the document:");
1617                 message += "\n\n";
1618                 if (words != 1)
1619                         message += bformat(_("%1$d words"), words);
1620                 else
1621                         message += _("One word");
1622                 message += "\n";
1623                 if (chars_blanks != 1)
1624                         message += bformat(_("%1$d characters (including blanks)"),
1625                                           chars_blanks);
1626                 else
1627                         message += _("One character (including blanks)");
1628                 message += "\n";
1629                 if (chars != 1)
1630                         message += bformat(_("%1$d characters (excluding blanks)"),
1631                                           chars);
1632                 else
1633                         message += _("One character (excluding blanks)");
1634
1635                 Alert::information(_("Statistics"), message);
1636         }
1637                 break;
1638
1639         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1640                 // turn compression on/off
1641                 buffer_.params().compressed = !buffer_.params().compressed;
1642                 break;
1643
1644         case LFUN_BUFFER_TOGGLE_OUTPUT_SYNC:
1645                 buffer_.params().output_sync = !buffer_.params().output_sync;
1646                 break;
1647
1648         case LFUN_SCREEN_UP:
1649         case LFUN_SCREEN_DOWN: {
1650                 Point p = getPos(cur);
1651                 // This code has been commented out to enable to scroll down a
1652                 // document, even if there are large insets in it (see bug #5465).
1653                 /*if (p.y_ < 0 || p.y_ > height_) {
1654                         // The cursor is off-screen so recenter before proceeding.
1655                         showCursor();
1656                         p = getPos(cur);
1657                 }*/
1658                 int const scrolled = scroll(act == LFUN_SCREEN_UP
1659                         ? -height_ : height_);
1660                 if (act == LFUN_SCREEN_UP && scrolled > -height_)
1661                         p = Point(0, 0);
1662                 if (act == LFUN_SCREEN_DOWN && scrolled < height_)
1663                         p = Point(width_, height_);
1664                 Cursor old = cur;
1665                 bool const in_texted = cur.inTexted();
1666                 cur.reset();
1667                 buffer_.changed(true);
1668                 updateHoveredInset();
1669
1670                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
1671                         true, act == LFUN_SCREEN_UP);
1672                 //FIXME: what to do with cur.x_target()?
1673                 bool update = in_texted && cur.bv().checkDepm(cur, old);
1674                 cur.finishUndo();
1675                 if (update) {
1676                         dr.screenUpdate(Update::Force | Update::FitCursor);
1677                         dr.forceBufferUpdate();
1678                 }
1679                 break;
1680         }
1681
1682         case LFUN_SCROLL:
1683                 lfunScroll(cmd);
1684                 dr.forceBufferUpdate();
1685                 break;
1686
1687         case LFUN_SCREEN_UP_SELECT: {
1688                 cur.selHandle(true);
1689                 if (isTopScreen()) {
1690                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1691                         cur.finishUndo();
1692                         break;
1693                 }
1694                 int y = getPos(cur).y_;
1695                 int const ymin = y - height_ + defaultRowHeight();
1696                 while (y > ymin && cur.up())
1697                         y = getPos(cur).y_;
1698
1699                 cur.finishUndo();
1700                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1701                 break;
1702         }
1703
1704         case LFUN_SCREEN_DOWN_SELECT: {
1705                 cur.selHandle(true);
1706                 if (isBottomScreen()) {
1707                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1708                         cur.finishUndo();
1709                         break;
1710                 }
1711                 int y = getPos(cur).y_;
1712                 int const ymax = y + height_ - defaultRowHeight();
1713                 while (y < ymax && cur.down())
1714                         y = getPos(cur).y_;
1715
1716                 cur.finishUndo();
1717                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1718                 break;
1719         }
1720
1721
1722         // This would be in Buffer class if only Cursor did not
1723         // require a bufferview
1724         case LFUN_INSET_FORALL: {
1725                 docstring const name = from_utf8(cmd.getArg(0));
1726                 string const commandstr = cmd.getLongArg(1);
1727                 FuncRequest const fr = lyxaction.lookupFunc(commandstr);
1728
1729                 // an arbitrary number to limit number of iterations
1730                 const int max_iter = 10000;
1731                 int iterations = 0;
1732                 Cursor & cur = d->cursor_;
1733                 Cursor const savecur = cur;
1734                 cur.reset();
1735                 if (!cur.nextInset())
1736                         cur.forwardInset();
1737                 cur.beginUndoGroup();
1738                 while(cur && iterations < max_iter) {
1739                         Inset * ins = cur.nextInset();
1740                         if (!ins)
1741                                 break;
1742                         docstring insname = ins->name();
1743                         while (!insname.empty()) {
1744                                 if (insname == name || name == from_utf8("*")) {
1745                                         cur.recordUndo();
1746                                         lyx::dispatch(fr, dr);
1747                                         ++iterations;
1748                                         break;
1749                                 }
1750                                 size_t const i = insname.rfind(':');
1751                                 if (i == string::npos)
1752                                         break;
1753                                 insname = insname.substr(0, i);
1754                         }
1755                         cur.forwardInset();
1756                 }
1757                 cur.endUndoGroup();
1758                 cur = savecur;
1759                 cur.fixIfBroken();
1760                 dr.screenUpdate(Update::Force);
1761                 dr.forceBufferUpdate();
1762
1763                 if (iterations >= max_iter) {
1764                         dr.setError(true);
1765                         dr.setMessage(bformat(_("`inset-forall' interrupted because number of actions is larger than %1$d"), max_iter));
1766                 } else
1767                         dr.setMessage(bformat(_("Applied \"%1$s\" to %2$d insets"), from_utf8(commandstr), iterations));
1768                 break;
1769         }
1770
1771
1772         case LFUN_BRANCH_ADD_INSERT: {
1773                 docstring branch_name = from_utf8(cmd.getArg(0));
1774                 if (branch_name.empty())
1775                         if (!Alert::askForText(branch_name, _("Branch name")) ||
1776                                                 branch_name.empty())
1777                                 break;
1778
1779                 DispatchResult drtmp;
1780                 buffer_.dispatch(FuncRequest(LFUN_BRANCH_ADD, branch_name), drtmp);
1781                 if (drtmp.error()) {
1782                         Alert::warning(_("Branch already exists"), drtmp.message());
1783                         break;
1784                 }
1785                 BranchList & branch_list = buffer_.params().branchlist();
1786                 vector<docstring> const branches =
1787                         getVectorFromString(branch_name, branch_list.separator());
1788                 for (vector<docstring>::const_iterator it = branches.begin();
1789                      it != branches.end(); ++it) {
1790                         branch_name = *it;
1791                         lyx::dispatch(FuncRequest(LFUN_BRANCH_INSERT, branch_name));
1792                 }
1793                 break;
1794         }
1795
1796         case LFUN_KEYMAP_OFF:
1797                 getIntl().keyMapOn(false);
1798                 break;
1799
1800         case LFUN_KEYMAP_PRIMARY:
1801                 getIntl().keyMapPrim();
1802                 break;
1803
1804         case LFUN_KEYMAP_SECONDARY:
1805                 getIntl().keyMapSec();
1806                 break;
1807
1808         case LFUN_KEYMAP_TOGGLE:
1809                 getIntl().toggleKeyMap();
1810                 break;
1811
1812         case LFUN_DIALOG_SHOW_NEW_INSET: {
1813                 string const name = cmd.getArg(0);
1814                 string data = trim(to_utf8(cmd.argument()).substr(name.size()));
1815                 if (decodeInsetParam(name, data, buffer_))
1816                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, name + " " + data));
1817                 else
1818                         lyxerr << "Inset type '" << name <<
1819                         "' not recognized in LFUN_DIALOG_SHOW_NEW_INSET" <<  endl;
1820                 break;
1821         }
1822
1823         case LFUN_CITATION_INSERT: {
1824                 if (argument.empty()) {
1825                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW_NEW_INSET, "citation"));
1826                         break;
1827                 }
1828                 // we can have one optional argument, delimited by '|'
1829                 // citation-insert <key>|<text_before>
1830                 // this should be enhanced to also support text_after
1831                 // and citation style
1832                 string arg = argument;
1833                 string opt1;
1834                 if (contains(argument, "|")) {
1835                         arg = token(argument, '|', 0);
1836                         opt1 = token(argument, '|', 1);
1837                 }
1838                 InsetCommandParams icp(CITE_CODE);
1839                 icp["key"] = from_utf8(arg);
1840                 if (!opt1.empty())
1841                         icp["before"] = from_utf8(opt1);
1842                 string icstr = InsetCommand::params2string("citation", icp);
1843                 FuncRequest fr(LFUN_INSET_INSERT, icstr);
1844                 lyx::dispatch(fr);
1845                 break;
1846         }
1847
1848         case LFUN_INSET_APPLY: {
1849                 string const name = cmd.getArg(0);
1850                 Inset * inset = editedInset(name);
1851                 if (!inset) {
1852                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1853                         lyx::dispatch(fr);
1854                         break;
1855                 }
1856                 // put cursor in front of inset.
1857                 if (!setCursorFromInset(inset)) {
1858                         LASSERT(false, break);
1859                 }
1860                 cur.recordUndo();
1861                 FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1862                 inset->dispatch(cur, fr);
1863                 dr.screenUpdate(cur.result().screenUpdate());
1864                 if (cur.result().needBufferUpdate())
1865                         dr.forceBufferUpdate();
1866                 break;
1867         }
1868
1869         default:
1870                 dispatched = false;
1871                 break;
1872         }
1873
1874         buffer_.undo().endUndoGroup();
1875         dr.dispatched(dispatched);
1876         return;
1877 }
1878
1879
1880 docstring const BufferView::requestSelection()
1881 {
1882         Cursor & cur = d->cursor_;
1883
1884         LYXERR(Debug::SELECTION, "requestSelection: cur.selection: " << cur.selection());
1885         if (!cur.selection()) {
1886                 d->xsel_cache_.set = false;
1887                 return docstring();
1888         }
1889
1890         LYXERR(Debug::SELECTION, "requestSelection: xsel_cache.set: " << d->xsel_cache_.set);
1891         if (!d->xsel_cache_.set ||
1892             cur.top() != d->xsel_cache_.cursor ||
1893             cur.realAnchor().top() != d->xsel_cache_.anchor)
1894         {
1895                 d->xsel_cache_.cursor = cur.top();
1896                 d->xsel_cache_.anchor = cur.realAnchor().top();
1897                 d->xsel_cache_.set = cur.selection();
1898                 return cur.selectionAsString(false);
1899         }
1900         return docstring();
1901 }
1902
1903
1904 void BufferView::clearSelection()
1905 {
1906         d->cursor_.clearSelection();
1907         // Clear the selection buffer. Otherwise a subsequent
1908         // middle-mouse-button paste would use the selection buffer,
1909         // not the more current external selection.
1910         cap::clearSelection();
1911         d->xsel_cache_.set = false;
1912         // The buffer did not really change, but this causes the
1913         // redraw we need because we cleared the selection above.
1914         buffer_.changed(false);
1915 }
1916
1917
1918 void BufferView::resize(int width, int height)
1919 {
1920         // Update from work area
1921         width_ = width;
1922         height_ = height;
1923
1924         // Clear the paragraph height cache.
1925         d->par_height_.clear();
1926         // Redo the metrics.
1927         updateMetrics();
1928 }
1929
1930
1931 Inset const * BufferView::getCoveringInset(Text const & text,
1932                 int x, int y) const
1933 {
1934         TextMetrics & tm = d->text_metrics_[&text];
1935         Inset * inset = tm.checkInsetHit(x, y);
1936         if (!inset)
1937                 return 0;
1938
1939         if (!inset->descendable(*this))
1940                 // No need to go further down if the inset is not
1941                 // descendable.
1942                 return inset;
1943
1944         size_t cell_number = inset->nargs();
1945         // Check all the inner cell.
1946         for (size_t i = 0; i != cell_number; ++i) {
1947                 Text const * inner_text = inset->getText(i);
1948                 if (inner_text) {
1949                         // Try deeper.
1950                         Inset const * inset_deeper =
1951                                 getCoveringInset(*inner_text, x, y);
1952                         if (inset_deeper)
1953                                 return inset_deeper;
1954                 }
1955         }
1956
1957         return inset;
1958 }
1959
1960
1961 void BufferView::updateHoveredInset() const
1962 {
1963         // Get inset under mouse, if there is one.
1964         Inset const * covering_inset = getCoveringInset(buffer_.text(),
1965                         d->mouse_position_cache_.x_, d->mouse_position_cache_.y_);
1966         if (covering_inset == d->last_inset_)
1967                 // Same inset, no need to do anything...
1968                 return;
1969
1970         bool need_redraw = false;
1971         if (d->last_inset_) {
1972                 // Remove the hint on the last hovered inset (if any).
1973                 need_redraw |= d->last_inset_->setMouseHover(this, false);
1974                 d->last_inset_ = 0;
1975         }
1976
1977         // const_cast because of setMouseHover().
1978         Inset * inset = const_cast<Inset *>(covering_inset);
1979         if (inset && inset->setMouseHover(this, true)) {
1980                 need_redraw = true;
1981                 // Only the insets that accept the hover state, do
1982                 // clear the last_inset_, so only set the last_inset_
1983                 // member if the hovered setting is accepted.
1984                 d->last_inset_ = inset;
1985         }
1986
1987         if (need_redraw) {
1988                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
1989                                 << d->mouse_position_cache_.x_ << ", "
1990                                 << d->mouse_position_cache_.y_ << ")");
1991
1992                 d->update_strategy_ = DecorationUpdate;
1993
1994                 // This event (moving without mouse click) is not passed further.
1995                 // This should be changed if it is further utilized.
1996                 buffer_.changed(false);
1997         }
1998 }
1999
2000
2001 void BufferView::clearLastInset(Inset * inset) const
2002 {
2003         if (d->last_inset_ != inset) {
2004                 LYXERR0("Wrong last_inset!");
2005                 LASSERT(false, /**/);
2006         }
2007         d->last_inset_ = 0;
2008 }
2009
2010
2011 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
2012 {
2013         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
2014
2015         // This is only called for mouse related events including
2016         // LFUN_FILE_OPEN generated by drag-and-drop.
2017         FuncRequest cmd = cmd0;
2018
2019         Cursor old = cursor();
2020         Cursor cur(*this);
2021         cur.push(buffer_.inset());
2022         cur.setSelection(d->cursor_.selection());
2023
2024         // Either the inset under the cursor or the
2025         // surrounding Text will handle this event.
2026
2027         // make sure we stay within the screen...
2028         cmd.set_y(min(max(cmd.y(), -1), height_));
2029
2030         d->mouse_position_cache_.x_ = cmd.x();
2031         d->mouse_position_cache_.y_ = cmd.y();
2032
2033         if (cmd.action() == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
2034                 updateHoveredInset();
2035                 return;
2036         }
2037
2038         // Build temporary cursor.
2039         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x(), cmd.y());
2040
2041         // Put anchor at the same position.
2042         cur.resetAnchor();
2043
2044         cur.beginUndoGroup();
2045
2046         // Try to dispatch to an non-editable inset near this position
2047         // via the temp cursor. If the inset wishes to change the real
2048         // cursor it has to do so explicitly by using
2049         //  cur.bv().cursor() = cur;  (or similar)
2050         if (inset)
2051                 inset->dispatch(cur, cmd);
2052
2053         // Now dispatch to the temporary cursor. If the real cursor should
2054         // be modified, the inset's dispatch has to do so explicitly.
2055         if (!inset || !cur.result().dispatched())
2056                 cur.dispatch(cmd);
2057
2058         cur.endUndoGroup();
2059
2060         // Notify left insets
2061         if (cur != old) {
2062                 old.fixIfBroken();
2063                 bool badcursor = notifyCursorLeavesOrEnters(old, cur);
2064                 if (badcursor)
2065                         cursor().fixIfBroken();
2066         }
2067
2068         // Do we have a selection?
2069         theSelection().haveSelection(cursor().selection());
2070
2071         // If the command has been dispatched,
2072         if (cur.result().dispatched() || cur.result().screenUpdate())
2073                 processUpdateFlags(cur.result().screenUpdate());
2074 }
2075
2076
2077 void BufferView::lfunScroll(FuncRequest const & cmd)
2078 {
2079         string const scroll_type = cmd.getArg(0);
2080         int scroll_step = 0;
2081         if (scroll_type == "line")
2082                 scroll_step = d->scrollbarParameters_.single_step;
2083         else if (scroll_type == "page")
2084                 scroll_step = d->scrollbarParameters_.page_step;
2085         else
2086                 return;
2087         string const scroll_quantity = cmd.getArg(1);
2088         if (scroll_quantity == "up")
2089                 scrollUp(scroll_step);
2090         else if (scroll_quantity == "down")
2091                 scrollDown(scroll_step);
2092         else {
2093                 int const scroll_value = convert<int>(scroll_quantity);
2094                 if (scroll_value)
2095                         scroll(scroll_step * scroll_value);
2096         }
2097         buffer_.changed(true);
2098         updateHoveredInset();
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         ListOfBuffers bufs = buffer().allRelatives();
2205         ListOfBuffers::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                                 lyx::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         cur.forceBufferUpdate();
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_.normalAnchor().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         if (update)
2328                 cur.forceBufferUpdate();
2329         return update;
2330 }
2331
2332
2333 void BufferView::putSelectionAt(DocIterator const & cur,
2334                                 int length, bool backwards)
2335 {
2336         d->cursor_.clearSelection();
2337
2338         setCursor(cur);
2339
2340         if (length) {
2341                 if (backwards) {
2342                         d->cursor_.pos() += length;
2343                         d->cursor_.setSelection(d->cursor_, -length);
2344                 } else
2345                         d->cursor_.setSelection(d->cursor_, length);
2346         }
2347         // Ensure a redraw happens in any case because the new selection could
2348         // possibly be on the same screen as the previous selection.
2349         processUpdateFlags(Update::Force | Update::FitCursor);
2350 }
2351
2352
2353 Cursor & BufferView::cursor()
2354 {
2355         return d->cursor_;
2356 }
2357
2358
2359 Cursor const & BufferView::cursor() const
2360 {
2361         return d->cursor_;
2362 }
2363
2364
2365 pit_type BufferView::anchor_ref() const
2366 {
2367         return d->anchor_pit_;
2368 }
2369
2370
2371 bool BufferView::singleParUpdate()
2372 {
2373         Text & buftext = buffer_.text();
2374         pit_type const bottom_pit = d->cursor_.bottom().pit();
2375         TextMetrics & tm = textMetrics(&buftext);
2376         int old_height = tm.parMetrics(bottom_pit).height();
2377
2378         // make sure inline completion pointer is ok
2379         if (d->inlineCompletionPos_.fixIfBroken())
2380                 d->inlineCompletionPos_ = DocIterator();
2381
2382         // In Single Paragraph mode, rebreak only
2383         // the (main text, not inset!) paragraph containing the cursor.
2384         // (if this paragraph contains insets etc., rebreaking will
2385         // recursively descend)
2386         tm.redoParagraph(bottom_pit);
2387         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
2388         if (pm.height() != old_height)
2389                 // Paragraph height has changed so we cannot proceed to
2390                 // the singlePar optimisation.
2391                 return false;
2392
2393         d->update_strategy_ = SingleParUpdate;
2394
2395         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
2396                 << " y2: " << pm.position() + pm.descent()
2397                 << " pit: " << bottom_pit
2398                 << " singlepar: 1");
2399         return true;
2400 }
2401
2402
2403 void BufferView::updateMetrics()
2404 {
2405         if (height_ == 0 || width_ == 0)
2406                 return;
2407
2408         Text & buftext = buffer_.text();
2409         pit_type const npit = int(buftext.paragraphs().size());
2410
2411         // Clear out the position cache in case of full screen redraw,
2412         d->coord_cache_.clear();
2413
2414         // Clear out paragraph metrics to avoid having invalid metrics
2415         // in the cache from paragraphs not relayouted below
2416         // The complete text metrics will be redone.
2417         d->text_metrics_.clear();
2418
2419         TextMetrics & tm = textMetrics(&buftext);
2420
2421         // make sure inline completion pointer is ok
2422         if (d->inlineCompletionPos_.fixIfBroken())
2423                 d->inlineCompletionPos_ = DocIterator();
2424
2425         if (d->anchor_pit_ >= npit)
2426                 // The anchor pit must have been deleted...
2427                 d->anchor_pit_ = npit - 1;
2428
2429         // Rebreak anchor paragraph.
2430         tm.redoParagraph(d->anchor_pit_);
2431         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
2432
2433         // position anchor
2434         if (d->anchor_pit_ == 0) {
2435                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
2436
2437                 // Complete buffer visible? Then it's easy.
2438                 if (scrollRange == 0)
2439                         d->anchor_ypos_ = anchor_pm.ascent();
2440
2441                 // FIXME: Some clever handling needed to show
2442                 // the _first_ paragraph up to the top if the cursor is
2443                 // in the first line.
2444         }
2445         anchor_pm.setPosition(d->anchor_ypos_);
2446
2447         LYXERR(Debug::PAINTING, "metrics: "
2448                 << " anchor pit = " << d->anchor_pit_
2449                 << " anchor ypos = " << d->anchor_ypos_);
2450
2451         // Redo paragraphs above anchor if necessary.
2452         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
2453         // We are now just above the anchor paragraph.
2454         pit_type pit1 = d->anchor_pit_ - 1;
2455         for (; pit1 >= 0 && y1 >= 0; --pit1) {
2456                 tm.redoParagraph(pit1);
2457                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
2458                 y1 -= pm.descent();
2459                 // Save the paragraph position in the cache.
2460                 pm.setPosition(y1);
2461                 y1 -= pm.ascent();
2462         }
2463
2464         // Redo paragraphs below the anchor if necessary.
2465         int y2 = d->anchor_ypos_ + anchor_pm.descent();
2466         // We are now just below the anchor paragraph.
2467         pit_type pit2 = d->anchor_pit_ + 1;
2468         for (; pit2 < npit && y2 <= height_; ++pit2) {
2469                 tm.redoParagraph(pit2);
2470                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
2471                 y2 += pm.ascent();
2472                 // Save the paragraph position in the cache.
2473                 pm.setPosition(y2);
2474                 y2 += pm.descent();
2475         }
2476
2477         LYXERR(Debug::PAINTING, "Metrics: "
2478                 << " anchor pit = " << d->anchor_pit_
2479                 << " anchor ypos = " << d->anchor_ypos_
2480                 << " y1 = " << y1
2481                 << " y2 = " << y2
2482                 << " pit1 = " << pit1
2483                 << " pit2 = " << pit2);
2484
2485         d->update_strategy_ = FullScreenUpdate;
2486
2487         if (lyxerr.debugging(Debug::WORKAREA)) {
2488                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
2489                 d->coord_cache_.dump();
2490         }
2491 }
2492
2493
2494 void BufferView::insertLyXFile(FileName const & fname)
2495 {
2496         LASSERT(d->cursor_.inTexted(), /**/);
2497
2498         // Get absolute path of file and add ".lyx"
2499         // to the filename if necessary
2500         FileName filename = fileSearch(string(), fname.absFileName(), "lyx");
2501
2502         docstring const disp_fn = makeDisplayPath(filename.absFileName());
2503         // emit message signal.
2504         message(bformat(_("Inserting document %1$s..."), disp_fn));
2505
2506         docstring res;
2507         Buffer buf("", false);
2508         if (buf.loadLyXFile(filename)) {
2509                 ErrorList & el = buffer_.errorList("Parse");
2510                 // Copy the inserted document error list into the current buffer one.
2511                 el = buf.errorList("Parse");
2512                 buffer_.undo().recordUndo(d->cursor_);
2513                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
2514                                              buf.params().documentClassPtr(), el);
2515                 res = _("Document %1$s inserted.");
2516         } else {
2517                 res = _("Could not insert document %1$s");
2518         }
2519
2520         buffer_.changed(true);
2521         // emit message signal.
2522         message(bformat(res, disp_fn));
2523         buffer_.errors("Parse");
2524 }
2525
2526
2527 Point BufferView::coordOffset(DocIterator const & dit) const
2528 {
2529         int x = 0;
2530         int y = 0;
2531         int lastw = 0;
2532
2533         // Addup contribution of nested insets, from inside to outside,
2534         // keeping the outer paragraph for a special handling below
2535         for (size_t i = dit.depth() - 1; i >= 1; --i) {
2536                 CursorSlice const & sl = dit[i];
2537                 int xx = 0;
2538                 int yy = 0;
2539
2540                 // get relative position inside sl.inset()
2541                 sl.inset().cursorPos(*this, sl, dit.boundary() && (i + 1 == dit.depth()), xx, yy);
2542
2543                 // Make relative position inside of the edited inset relative to sl.inset()
2544                 x += xx;
2545                 y += yy;
2546
2547                 // In case of an RTL inset, the edited inset will be positioned to the left
2548                 // of xx:yy
2549                 if (sl.text()) {
2550                         bool boundary_i = dit.boundary() && i + 1 == dit.depth();
2551                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
2552                         if (rtl)
2553                                 x -= lastw;
2554                 }
2555
2556                 // remember width for the case that sl.inset() is positioned in an RTL inset
2557                 if (i && dit[i - 1].text()) {
2558                         // If this Inset is inside a Text Inset, retrieve the Dimension
2559                         // from the containing text instead of using Inset::dimension() which
2560                         // might not be implemented.
2561                         // FIXME (Abdel 23/09/2007): this is a bit messy because of the
2562                         // elimination of Inset::dim_ cache. This coordOffset() method needs
2563                         // to be rewritten in light of the new design.
2564                         Dimension const & dim = parMetrics(dit[i - 1].text(),
2565                                 dit[i - 1].pit()).insetDimension(&sl.inset());
2566                         lastw = dim.wid;
2567                 } else {
2568                         Dimension const dim = sl.inset().dimension(*this);
2569                         lastw = dim.wid;
2570                 }
2571
2572                 //lyxerr << "Cursor::getPos, i: "
2573                 // << i << " x: " << xx << " y: " << y << endl;
2574         }
2575
2576         // Add contribution of initial rows of outermost paragraph
2577         CursorSlice const & sl = dit[0];
2578         TextMetrics const & tm = textMetrics(sl.text());
2579         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
2580         LASSERT(!pm.rows().empty(), /**/);
2581         y -= pm.rows()[0].ascent();
2582 #if 1
2583         // FIXME: document this mess
2584         size_t rend;
2585         if (sl.pos() > 0 && dit.depth() == 1) {
2586                 int pos = sl.pos();
2587                 if (pos && dit.boundary())
2588                         --pos;
2589 //              lyxerr << "coordOffset: boundary:" << dit.boundary() << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
2590                 rend = pm.pos2row(pos);
2591         } else
2592                 rend = pm.pos2row(sl.pos());
2593 #else
2594         size_t rend = pm.pos2row(sl.pos());
2595 #endif
2596         for (size_t rit = 0; rit != rend; ++rit)
2597                 y += pm.rows()[rit].height();
2598         y += pm.rows()[rend].ascent();
2599
2600         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2601
2602         // Make relative position from the nested inset now bufferview absolute.
2603         int xx = bottom_tm.cursorX(dit.bottom(), dit.boundary() && dit.depth() == 1);
2604         x += xx;
2605
2606         // In the RTL case place the nested inset at the left of the cursor in
2607         // the outer paragraph
2608         bool boundary_1 = dit.boundary() && 1 == dit.depth();
2609         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2610         if (rtl)
2611                 x -= lastw;
2612
2613         return Point(x, y);
2614 }
2615
2616
2617 Point BufferView::getPos(DocIterator const & dit) const
2618 {
2619         if (!paragraphVisible(dit))
2620                 return Point(-1, -1);
2621
2622         CursorSlice const & bot = dit.bottom();
2623         TextMetrics const & tm = textMetrics(bot.text());
2624
2625         // offset from outer paragraph
2626         Point p = coordOffset(dit);
2627         p.y_ += tm.parMetrics(bot.pit()).position();
2628         return p;
2629 }
2630
2631
2632 bool BufferView::paragraphVisible(DocIterator const & dit) const
2633 {
2634         CursorSlice const & bot = dit.bottom();
2635         TextMetrics const & tm = textMetrics(bot.text());
2636
2637         return tm.contains(bot.pit());
2638 }
2639
2640
2641 void BufferView::cursorPosAndHeight(Point & p, int & h) const
2642 {
2643         Cursor const & cur = cursor();
2644         Font const font = cur.getFont();
2645         frontend::FontMetrics const & fm = theFontMetrics(font);
2646         int const asc = fm.maxAscent();
2647         int const des = fm.maxDescent();
2648         h = asc + des;
2649         p = getPos(cur);
2650         p.y_ -= asc;
2651 }
2652
2653
2654 bool BufferView::cursorInView(Point const & p, int h) const
2655 {
2656         Cursor const & cur = cursor();
2657         // does the cursor touch the screen ?
2658         if (p.y_ + h < 0 || p.y_ >= workHeight() || !paragraphVisible(cur))
2659                 return false;
2660         return true;
2661 }
2662
2663
2664 void BufferView::draw(frontend::Painter & pain)
2665 {
2666         if (height_ == 0 || width_ == 0)
2667                 return;
2668         LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
2669
2670         Text & text = buffer_.text();
2671         TextMetrics const & tm = d->text_metrics_[&text];
2672         int const y = tm.first().second->position();
2673         PainterInfo pi(this, pain);
2674
2675         switch (d->update_strategy_) {
2676
2677         case NoScreenUpdate:
2678                 // If no screen painting is actually needed, only some the different
2679                 // coordinates of insets and paragraphs needs to be updated.
2680                 pi.full_repaint = true;
2681                 pi.pain.setDrawingEnabled(false);
2682                 tm.draw(pi, 0, y);
2683                 break;
2684
2685         case SingleParUpdate:
2686                 pi.full_repaint = false;
2687                 // In general, only the current row of the outermost paragraph
2688                 // will be redrawn. Particular cases where selection spans
2689                 // multiple paragraph are correctly detected in TextMetrics.
2690                 tm.draw(pi, 0, y);
2691                 break;
2692
2693         case DecorationUpdate:
2694                 // FIXME: We should also distinguish DecorationUpdate to avoid text
2695                 // drawing if possible. This is not possible to do easily right now
2696                 // because of the single backing pixmap.
2697
2698         case FullScreenUpdate:
2699                 // The whole screen, including insets, will be refreshed.
2700                 pi.full_repaint = true;
2701
2702                 // Clear background.
2703                 pain.fillRectangle(0, 0, width_, height_,
2704                         pi.backgroundColor(&buffer_.inset()));
2705
2706                 // Draw everything.
2707                 tm.draw(pi, 0, y);
2708
2709                 // and possibly grey out below
2710                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2711                 int const y2 = lastpm.second->position() + lastpm.second->descent();
2712
2713                 if (y2 < height_) {
2714                         Color color = buffer().isInternal()
2715                                 ? Color_background : Color_bottomarea;
2716                         pain.fillRectangle(0, y2, width_, height_ - y2, color);
2717                 }
2718                 break;
2719         }
2720         LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
2721
2722         // The scrollbar needs an update.
2723         updateScrollbar();
2724
2725         // Normalize anchor for next time
2726         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
2727         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2728         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
2729                 ParagraphMetrics const & pm = tm.parMetrics(pit);
2730                 if (pm.position() + pm.descent() > 0) {
2731                         d->anchor_pit_ = pit;
2732                         d->anchor_ypos_ = pm.position();
2733                         break;
2734                 }
2735         }
2736         LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
2737                 << "  anchor ypos = " << d->anchor_ypos_);
2738 }
2739
2740
2741 void BufferView::message(docstring const & msg)
2742 {
2743         if (d->gui_)
2744                 d->gui_->message(msg);
2745 }
2746
2747
2748 void BufferView::showDialog(string const & name)
2749 {
2750         if (d->gui_)
2751                 d->gui_->showDialog(name, string());
2752 }
2753
2754
2755 void BufferView::showDialog(string const & name,
2756         string const & data, Inset * inset)
2757 {
2758         if (d->gui_)
2759                 d->gui_->showDialog(name, data, inset);
2760 }
2761
2762
2763 void BufferView::updateDialog(string const & name, string const & data)
2764 {
2765         if (d->gui_)
2766                 d->gui_->updateDialog(name, data);
2767 }
2768
2769
2770 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
2771 {
2772         d->gui_ = gui;
2773 }
2774
2775
2776 // FIXME: Move this out of BufferView again
2777 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
2778 {
2779         if (!fname.isReadableFile()) {
2780                 docstring const error = from_ascii(strerror(errno));
2781                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
2782                 docstring const text =
2783                   bformat(_("Could not read the specified document\n"
2784                             "%1$s\ndue to the error: %2$s"), file, error);
2785                 Alert::error(_("Could not read file"), text);
2786                 return docstring();
2787         }
2788
2789         if (!fname.isReadableFile()) {
2790                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
2791                 docstring const text =
2792                   bformat(_("%1$s\n is not readable."), file);
2793                 Alert::error(_("Could not open file"), text);
2794                 return docstring();
2795         }
2796
2797         // FIXME UNICODE: We don't know the encoding of the file
2798         docstring file_content = fname.fileContents("UTF-8");
2799         if (file_content.empty()) {
2800                 Alert::error(_("Reading not UTF-8 encoded file"),
2801                              _("The file is not UTF-8 encoded.\n"
2802                                "It will be read as local 8Bit-encoded.\n"
2803                                "If this does not give the correct result\n"
2804                                "then please change the encoding of the file\n"
2805                                "to UTF-8 with a program other than LyX.\n"));
2806                 file_content = fname.fileContents("local8bit");
2807         }
2808
2809         return normalize_c(file_content);
2810 }
2811
2812
2813 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
2814 {
2815         docstring const tmpstr = contentsOfPlaintextFile(f);
2816
2817         if (tmpstr.empty())
2818                 return;
2819
2820         Cursor & cur = cursor();
2821         cap::replaceSelection(cur);
2822         buffer_.undo().recordUndo(cur);
2823         if (asParagraph)
2824                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr, cur.current_font);
2825         else
2826                 cur.innerText()->insertStringAsLines(cur, tmpstr, cur.current_font);
2827
2828         buffer_.changed(true);
2829 }
2830
2831
2832 docstring const & BufferView::inlineCompletion() const
2833 {
2834         return d->inlineCompletion_;
2835 }
2836
2837
2838 size_t const & BufferView::inlineCompletionUniqueChars() const
2839 {
2840         return d->inlineCompletionUniqueChars_;
2841 }
2842
2843
2844 DocIterator const & BufferView::inlineCompletionPos() const
2845 {
2846         return d->inlineCompletionPos_;
2847 }
2848
2849
2850 bool samePar(DocIterator const & a, DocIterator const & b)
2851 {
2852         if (a.empty() && b.empty())
2853                 return true;
2854         if (a.empty() || b.empty())
2855                 return false;
2856         if (a.depth() != b.depth())
2857                 return false;
2858         return &a.innerParagraph() == &b.innerParagraph();
2859 }
2860
2861
2862 void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
2863         docstring const & completion, size_t uniqueChars)
2864 {
2865         uniqueChars = min(completion.size(), uniqueChars);
2866         bool changed = d->inlineCompletion_ != completion
2867                 || d->inlineCompletionUniqueChars_ != uniqueChars;
2868         bool singlePar = true;
2869         d->inlineCompletion_ = completion;
2870         d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
2871
2872         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
2873
2874         // at new position?
2875         DocIterator const & old = d->inlineCompletionPos_;
2876         if (old != pos) {
2877                 //lyxerr << "inlineCompletionPos changed" << std::endl;
2878                 // old or pos are in another paragraph?
2879                 if ((!samePar(cur, pos) && !pos.empty())
2880                     || (!samePar(cur, old) && !old.empty())) {
2881                         singlePar = false;
2882                         //lyxerr << "different paragraph" << std::endl;
2883                 }
2884                 d->inlineCompletionPos_ = pos;
2885         }
2886
2887         // set update flags
2888         if (changed) {
2889                 if (singlePar && !(cur.result().screenUpdate() & Update::Force))
2890                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
2891                 else
2892                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::Force);
2893         }
2894 }
2895
2896 } // namespace lyx