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 "WordLangTuple.h"
  55
  56 #include "insets/InsetBibtex.h"
  57 #include "insets/InsetCitation.h"
  58 #include "insets/InsetCommand.h" // ChangeRefs
  59 #include "insets/InsetExternal.h"
  60 #include "insets/InsetGraphics.h"
  61 #include "insets/InsetNote.h"
  62 #include "insets/InsetRef.h"
  63 #include "insets/InsetText.h"
  64
  65 #include "mathed/MathData.h"
  66
  67 #include "frontends/alert.h"
  68 #include "frontends/Application.h"
  69 #include "frontends/Delegates.h"
  70 #include "frontends/FontMetrics.h"
  71 #include "frontends/Painter.h"
  72 #include "frontends/Selection.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/lassert.h"
  80 #include "support/lstrings.h"
  81 #include "support/Package.h"
  82 #include "support/types.h"
  83
  84 #include <cerrno>
  85 #include <fstream>
  86 #include <functional>
  87 #include <iterator>
  88 #include <sstream>
  89 #include <vector>
  90
  91 using namespace std;
  92 using namespace lyx::support;
  93
  94 namespace lyx {
  95
  96 namespace Alert = frontend::Alert;
  97
  98 namespace {
  99
 100 /// Return an inset of this class if it exists at the current cursor position
 101 template <class T>
 102 T * getInsetByCode(Cursor const & cur, InsetCode code)
 103 {
 104         DocIterator it = cur;
 105         Inset * inset = it.nextInset();
 106         if (inset && inset->lyxCode() == code)
 107                 return static_cast<T*>(inset);
 108         return 0;
 109 }
 110
 111
 112 /// Note that comparing contents can only be used for InsetCommand
 113 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 114         docstring const & contents)
 115 {
 116         DocIterator tmpdit = dit;
 117
 118         while (tmpdit) {
 119                 Inset const * inset = tmpdit.nextInset();
 120                 if (inset) {
 121                         bool const valid_code = std::find(codes.begin(), codes.end(),
 122                                 inset->lyxCode()) != codes.end();
 123                         InsetCommand const * ic = inset->asInsetCommand();
 124                         bool const same_or_no_contents =  contents.empty()
 125                                 || (ic && (ic->getFirstNonOptParam() == contents));
 126
 127                         if (valid_code && same_or_no_contents) {
 128                                 dit = tmpdit;
 129                                 return true;
 130                         }
 131                 }
 132                 tmpdit.forwardInset();
 133         }
 134
 135         return false;
 136 }
 137
 138
 139 /// Looks for next inset with one of the given codes.
 140 /// Note that same_content can only be used for InsetCommand
 141 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 142         bool same_content)
 143 {
 144         docstring contents;
 145         DocIterator tmpdit = dit;
 146         tmpdit.forwardInset();
 147         if (!tmpdit)
 148                 return false;
 149
 150         Inset const * inset = tmpdit.nextInset();
 151         if (same_content && inset) {
 152                 InsetCommand const * ic = inset->asInsetCommand();
 153                 if (ic) {
 154                         bool const valid_code = std::find(codes.begin(), codes.end(),
 155                                 ic->lyxCode()) != codes.end();
 156                         if (valid_code)
 157                                 contents = ic->getFirstNonOptParam();
 158                 }
 159         }
 160
 161         if (!findNextInset(tmpdit, codes, contents)) {
 162                 if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
 163                         Inset * inset = &tmpdit.bottom().inset();
 164                         tmpdit = doc_iterator_begin(&inset->buffer(), inset);
 165                         if (!findNextInset(tmpdit, codes, contents))
 166                                 return false;
 167                 } else {
 168                         return false;
 169                 }
 170         }
 171
 172         dit = tmpdit;
 173         return true;
 174 }
 175
 176
 177 /// Looks for next inset with the given code
 178 void findInset(DocIterator & dit, InsetCode code, bool same_content)
 179 {
 180         findInset(dit, vector<InsetCode>(1, code), same_content);
 181 }
 182
 183
 184 /// Moves cursor to the next inset with one of the given codes.
 185 void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
 186                bool same_content)
 187 {
 188         Cursor tmpcur = bv->cursor();
 189         if (!findInset(tmpcur, codes, same_content)) {
 190                 bv->cursor().message(_("No more insets"));
 191                 return;
 192         }
 193
 194         tmpcur.clearSelection();
 195         bv->setCursor(tmpcur);
 196         bv->showCursor();
 197 }
 198
 199
 200 /// Moves cursor to the next inset with given code.
 201 void gotoInset(BufferView * bv, InsetCode code, bool same_content)
 202 {
 203         gotoInset(bv, vector<InsetCode>(1, code), same_content);
 204 }
 205
 206
 207 /// A map from a Text to the associated text metrics
 208 typedef map<Text const *, TextMetrics> TextMetricsCache;
 209
 210 enum ScreenUpdateStrategy {
 211         NoScreenUpdate,
 212         SingleParUpdate,
 213         FullScreenUpdate,
 214         DecorationUpdate
 215 };
 216
 217 } // anon namespace
 218
 219
 220 /////////////////////////////////////////////////////////////////////
 221 //
 222 // BufferView
 223 //
 224 /////////////////////////////////////////////////////////////////////
 225
 226 struct BufferView::Private
 227 {
 228         Private(BufferView & bv): wh_(0), cursor_(bv),
 229                 anchor_pit_(0), anchor_ypos_(0),
 230                 inlineCompletionUniqueChars_(0),
 231                 last_inset_(0), clickable_inset_(false),
 232                 mouse_position_cache_(),
 233                 bookmark_edit_position_(-1), gui_(0)
 234         {}
 235
 236         ///
 237         ScrollbarParameters scrollbarParameters_;
 238         ///
 239         ScreenUpdateStrategy update_strategy_;
 240         ///
 241         CoordCache coord_cache_;
 242
 243         /// Estimated average par height for scrollbar.
 244         int wh_;
 245         /// this is used to handle XSelection events in the right manner.
 246         struct {
 247                 CursorSlice cursor;
 248                 CursorSlice anchor;
 249                 bool set;
 250         } xsel_cache_;
 251         ///
 252         Cursor cursor_;
 253         ///
 254         pit_type anchor_pit_;
 255         ///
 256         int anchor_ypos_;
 257         ///
 258         vector<int> par_height_;
 259
 260         ///
 261         DocIterator inlineCompletionPos_;
 262         ///
 263         docstring inlineCompletion_;
 264         ///
 265         size_t inlineCompletionUniqueChars_;
 266
 267         /// keyboard mapping object.
 268         Intl intl_;
 269
 270         /// last visited inset.
 271         /** kept to send setMouseHover(false).
 272           * Not owned, so don't delete.
 273           */
 274         Inset const * last_inset_;
 275         /// are we hovering something that we can click
 276         bool clickable_inset_;
 277
 278         /// position of the mouse at the time of the last mouse move
 279         /// This is used to update the hovering status of inset in
 280         /// cases where the buffer is scrolled, but the mouse didn't move.
 281         Point mouse_position_cache_;
 282
 283         // cache for id of the paragraph which was edited the last time
 284         int bookmark_edit_position_;
 285
 286         mutable TextMetricsCache text_metrics_;
 287
 288         /// Whom to notify.
 289         /** Not owned, so don't delete.
 290           */
 291         frontend::GuiBufferViewDelegate * gui_;
 292
 293         /// Cache for Find Next
 294         FuncRequest search_request_cache_;
 295
 296         ///
 297         map<string, Inset *> edited_insets_;
 298 };
 299
 300
 301 BufferView::BufferView(Buffer & buf)
 302         : width_(0), height_(0), full_screen_(false), buffer_(buf),
 303       d(new Private(*this))
 304 {
 305         d->xsel_cache_.set = false;
 306         d->intl_.initKeyMapper(lyxrc.use_kbmap);
 307
 308         d->cursor_.setBuffer(&buf);
 309         d->cursor_.push(buffer_.inset());
 310         d->cursor_.resetAnchor();
 311         d->cursor_.setCurrentFont();
 312
 313         buffer_.updatePreviews();
 314 }
 315
 316
 317 BufferView::~BufferView()
 318 {
 319         // current buffer is going to be switched-off, save cursor pos
 320         // Ideally, the whole cursor stack should be saved, but session
 321         // currently can only handle bottom (whole document) level pit and pos.
 322         // That is to say, if a cursor is in a nested inset, it will be
 323         // restore to the left of the top level inset.
 324         LastFilePosSection::FilePos fp;
 325         fp.pit = d->cursor_.bottom().pit();
 326         fp.pos = d->cursor_.bottom().pos();
 327         theSession().lastFilePos().save(buffer_.fileName(), fp);
 328
 329         if (d->last_inset_)
 330                 d->last_inset_->setMouseHover(this, false);
 331
 332         delete d;
 333 }
 334
 335
 336 int BufferView::rightMargin() const
 337 {
 338         // The additional test for the case the outliner is opened.
 339         if (!full_screen_ ||
 340                 !lyxrc.full_screen_limit ||
 341                 width_ < lyxrc.full_screen_width + 20)
 342                         return 10;
 343
 344         return (width_ - lyxrc.full_screen_width) / 2;
 345 }
 346
 347
 348 int BufferView::leftMargin() const
 349 {
 350         return rightMargin();
 351 }
 352
 353
 354 bool BufferView::isTopScreen() const
 355 {
 356         return d->scrollbarParameters_.position == d->scrollbarParameters_.min;
 357 }
 358
 359
 360 bool BufferView::isBottomScreen() const
 361 {
 362         return d->scrollbarParameters_.position == d->scrollbarParameters_.max;
 363 }
 364
 365
 366 Intl & BufferView::getIntl()
 367 {
 368         return d->intl_;
 369 }
 370
 371
 372 Intl const & BufferView::getIntl() const
 373 {
 374         return d->intl_;
 375 }
 376
 377
 378 CoordCache & BufferView::coordCache()
 379 {
 380         return d->coord_cache_;
 381 }
 382
 383
 384 CoordCache const & BufferView::coordCache() const
 385 {
 386         return d->coord_cache_;
 387 }
 388
 389
 390 Buffer & BufferView::buffer()
 391 {
 392         return buffer_;
 393 }
 394
 395
 396 Buffer const & BufferView::buffer() const
 397 {
 398         return buffer_;
 399 }
 400
 401
 402 bool BufferView::fitCursor()
 403 {
 404         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
 405                 frontend::FontMetrics const & fm =
 406                         theFontMetrics(d->cursor_.getFont().fontInfo());
 407                 int const asc = fm.maxAscent();
 408                 int const des = fm.maxDescent();
 409                 Point const p = getPos(d->cursor_);
 410                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 411                         return false;
 412         }
 413         return true;
 414 }
 415
 416
 417 void BufferView::processUpdateFlags(Update::flags flags)
 418 {
 419         // This is close to a hot-path.
 420         LYXERR(Debug::DEBUG, "BufferView::processUpdateFlags()"
 421                 << "[fitcursor = " << (flags & Update::FitCursor)
 422                 << ", forceupdate = " << (flags & Update::Force)
 423                 << ", singlepar = " << (flags & Update::SinglePar)
 424                 << "]  buffer: " << &buffer_);
 425
 426         // FIXME Does this really need doing here? It's done in updateBuffer, and
 427         // if the Buffer doesn't need updating, then do the macros?
 428         buffer_.updateMacros();
 429
 430         // Now do the first drawing step if needed. This consists on updating
 431         // the CoordCache in updateMetrics().
 432         // The second drawing step is done in WorkArea::redraw() if needed.
 433
 434         // Case when no explicit update is requested.
 435         if (!flags) {
 436                 // no need to redraw anything.
 437                 d->update_strategy_ = NoScreenUpdate;
 438                 return;
 439         }
 440
 441         if (flags == Update::Decoration) {
 442                 d->update_strategy_ = DecorationUpdate;
 443                 buffer_.changed(false);
 444                 return;
 445         }
 446
 447         if (flags == Update::FitCursor
 448                 || flags == (Update::Decoration | Update::FitCursor)) {
 449                 // tell the frontend to update the screen if needed.
 450                 if (fitCursor()) {
 451                         showCursor();
 452                         return;
 453                 }
 454                 if (flags & Update::Decoration) {
 455                         d->update_strategy_ = DecorationUpdate;
 456                         buffer_.changed(false);
 457                         return;
 458                 }
 459                 // no screen update is needed.
 460                 d->update_strategy_ = NoScreenUpdate;
 461                 return;
 462         }
 463
 464         bool const full_metrics = flags & Update::Force || !singleParUpdate();
 465
 466         if (full_metrics)
 467                 // We have to update the full screen metrics.
 468                 updateMetrics();
 469
 470         if (!(flags & Update::FitCursor)) {
 471                 // Nothing to do anymore. Trigger a redraw and return
 472                 buffer_.changed(false);
 473                 return;
 474         }
 475
 476         // updateMetrics() does not update paragraph position
 477         // This is done at draw() time. So we need a redraw!
 478         buffer_.changed(false);
 479
 480         if (fitCursor()) {
 481                 // The cursor is off screen so ensure it is visible.
 482                 // refresh it:
 483                 showCursor();
 484         }
 485
 486         updateHoveredInset();
 487 }
 488
 489
 490 void BufferView::updateScrollbar()
 491 {
 492         if (height_ == 0 && width_ == 0)
 493                 return;
 494
 495         // We prefer fixed size line scrolling.
 496         d->scrollbarParameters_.single_step = defaultRowHeight();
 497         // We prefer full screen page scrolling.
 498         d->scrollbarParameters_.page_step = height_;
 499
 500         Text & t = buffer_.text();
 501         TextMetrics & tm = d->text_metrics_[&t];
 502
 503         LYXERR(Debug::GUI, " Updating scrollbar: height: "
 504                 << t.paragraphs().size()
 505                 << " curr par: " << d->cursor_.bottom().pit()
 506                 << " default height " << defaultRowHeight());
 507
 508         size_t const parsize = t.paragraphs().size();
 509         if (d->par_height_.size() != parsize) {
 510                 d->par_height_.clear();
 511                 // FIXME: We assume a default paragraph height of 2 rows. This
 512                 // should probably be pondered with the screen width.
 513                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
 514         }
 515
 516         // Look at paragraph heights on-screen
 517         pair<pit_type, ParagraphMetrics const *> first = tm.first();
 518         pair<pit_type, ParagraphMetrics const *> last = tm.last();
 519         for (pit_type pit = first.first; pit <= last.first; ++pit) {
 520                 d->par_height_[pit] = tm.parMetrics(pit).height();
 521                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
 522                         << d->par_height_[pit]);
 523         }
 524
 525         int top_pos = first.second->position() - first.second->ascent();
 526         int bottom_pos = last.second->position() + last.second->descent();
 527         bool first_visible = first.first == 0 && top_pos >= 0;
 528         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
 529         if (first_visible && last_visible) {
 530                 d->scrollbarParameters_.min = 0;
 531                 d->scrollbarParameters_.max = 0;
 532                 return;
 533         }
 534
 535         d->scrollbarParameters_.min = top_pos;
 536         for (size_t i = 0; i != size_t(first.first); ++i)
 537                 d->scrollbarParameters_.min -= d->par_height_[i];
 538         d->scrollbarParameters_.max = bottom_pos;
 539         for (size_t i = last.first + 1; i != parsize; ++i)
 540                 d->scrollbarParameters_.max += d->par_height_[i];
 541
 542         d->scrollbarParameters_.position = 0;
 543         // The reference is the top position so we remove one page.
 544         if (lyxrc.scroll_below_document)
 545                 d->scrollbarParameters_.max -= minVisiblePart();
 546         else
 547                 d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 548 }
 549
 550
 551 ScrollbarParameters const & BufferView::scrollbarParameters() const
 552 {
 553         return d->scrollbarParameters_;
 554 }
 555
 556
 557 docstring BufferView::toolTip(int x, int y) const
 558 {
 559         // Get inset under mouse, if there is one.
 560         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 561         if (!covering_inset)
 562                 // No inset, no tooltip...
 563                 return docstring();
 564         return covering_inset->toolTip(*this, x, y);
 565 }
 566
 567
 568 string BufferView::contextMenu(int x, int y) const
 569 {
 570         //If there is a selection, return the containing inset menu
 571         if (d->cursor_.selection())
 572                 return d->cursor_.inset().contextMenu(*this, x, y);
 573
 574         // Get inset under mouse, if there is one.
 575         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 576         if (covering_inset)
 577                 return covering_inset->contextMenu(*this, x, y);
 578
 579         return buffer_.inset().contextMenu(*this, x, y);
 580 }
 581
 582
 583 void BufferView::scrollDocView(int value, bool update)
 584 {
 585         int const offset = value - d->scrollbarParameters_.position;
 586
 587         // No scrolling at all? No need to redraw anything
 588         if (offset == 0)
 589                 return;
 590
 591         // If the offset is less than 2 screen height, prefer to scroll instead.
 592         if (abs(offset) <= 2 * height_) {
 593                 d->anchor_ypos_ -= offset;
 594                 buffer_.changed(true);
 595                 updateHoveredInset();
 596                 return;
 597         }
 598
 599         // cut off at the top
 600         if (value <= d->scrollbarParameters_.min) {
 601                 DocIterator dit = doc_iterator_begin(&buffer_);
 602                 showCursor(dit, false, update);
 603                 LYXERR(Debug::SCROLLING, "scroll to top");
 604                 return;
 605         }
 606
 607         // cut off at the bottom
 608         if (value >= d->scrollbarParameters_.max) {
 609                 DocIterator dit = doc_iterator_end(&buffer_);
 610                 dit.backwardPos();
 611                 showCursor(dit, false, update);
 612                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 613                 return;
 614         }
 615
 616         // find paragraph at target position
 617         int par_pos = d->scrollbarParameters_.min;
 618         pit_type i = 0;
 619         for (; i != int(d->par_height_.size()); ++i) {
 620                 par_pos += d->par_height_[i];
 621                 if (par_pos >= value)
 622                         break;
 623         }
 624
 625         if (par_pos < value) {
 626                 // It seems we didn't find the correct pit so stay on the safe side and
 627                 // scroll to bottom.
 628                 LYXERR0("scrolling position not found!");
 629                 scrollDocView(d->scrollbarParameters_.max, update);
 630                 return;
 631         }
 632
 633         DocIterator dit = doc_iterator_begin(&buffer_);
 634         dit.pit() = i;
 635         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 636         showCursor(dit, false, update);
 637 }
 638
 639
 640 // FIXME: this method is not working well.
 641 void BufferView::setCursorFromScrollbar()
 642 {
 643         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 644
 645         int const height = 2 * defaultRowHeight();
 646         int const first = height;
 647         int const last = height_ - height;
 648         int newy = 0;
 649         Cursor const & oldcur = d->cursor_;
 650
 651         switch (cursorStatus(oldcur)) {
 652         case CUR_ABOVE:
 653                 newy = first;
 654                 break;
 655         case CUR_BELOW:
 656                 newy = last;
 657                 break;
 658         case CUR_INSIDE:
 659                 int const y = getPos(oldcur).y_;
 660                 newy = min(last, max(y, first));
 661                 if (y == newy)
 662                         return;
 663         }
 664         // We reset the cursor because cursorStatus() does not
 665         // work when the cursor is within mathed.
 666         Cursor cur(*this);
 667         cur.reset();
 668         tm.setCursorFromCoordinates(cur, 0, newy);
 669
 670         // update the bufferview cursor and notify insets
 671         // FIXME: Care about the d->cursor_ flags to redraw if needed
 672         Cursor old = d->cursor_;
 673         mouseSetCursor(cur);
 674         // the DEPM call in mouseSetCursor() might have destroyed the
 675         // paragraph the cursor is in.
 676         bool badcursor = old.fixIfBroken();
 677         badcursor |= notifyCursorLeavesOrEnters(old, d->cursor_);
 678         if (badcursor)
 679                 d->cursor_.fixIfBroken();
 680 }
 681
 682
 683 Change const BufferView::getCurrentChange() const
 684 {
 685         if (!d->cursor_.selection())
 686                 return Change(Change::UNCHANGED);
 687
 688         DocIterator dit = d->cursor_.selectionBegin();
 689         // The selected content might have been changed (see #7685)
 690         while (dit.inMathed())
 691                 // Find enclosing text cursor
 692                 dit.pop_back();
 693         return dit.paragraph().lookupChange(dit.pos());
 694 }
 695
 696
 697 // this could be used elsewhere as well?
 698 // FIXME: This does not work within mathed!
 699 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 700 {
 701         Point const p = getPos(dit);
 702         if (p.y_ < 0)
 703                 return CUR_ABOVE;
 704         if (p.y_ > workHeight())
 705                 return CUR_BELOW;
 706         return CUR_INSIDE;
 707 }
 708
 709
 710 void BufferView::bookmarkEditPosition()
 711 {
 712         // Don't eat cpu time for each keystroke
 713         if (d->cursor_.paragraph().id() == d->bookmark_edit_position_)
 714                 return;
 715         saveBookmark(0);
 716         d->bookmark_edit_position_ = d->cursor_.paragraph().id();
 717 }
 718
 719
 720 void BufferView::saveBookmark(unsigned int idx)
 721 {
 722         // tentatively save bookmark, id and pos will be used to
 723         // acturately locate a bookmark in a 'live' lyx session.
 724         // pit and pos will be updated with bottom level pit/pos
 725         // when lyx exits.
 726         if (!buffer_.isInternal()) {
 727                 theSession().bookmarks().save(
 728                         buffer_.fileName(),
 729                         d->cursor_.bottom().pit(),
 730                         d->cursor_.bottom().pos(),
 731                         d->cursor_.paragraph().id(),
 732                         d->cursor_.pos(),
 733                         idx
 734                         );
 735                 if (idx)
 736                         // emit message signal.
 737                         message(_("Save bookmark"));
 738         }
 739 }
 740
 741
 742 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 743         int top_id, pos_type top_pos)
 744 {
 745         bool success = false;
 746         DocIterator dit;
 747
 748         d->cursor_.clearSelection();
 749
 750         // if a valid par_id is given, try it first
 751         // This is the case for a 'live' bookmark when unique paragraph ID
 752         // is used to track bookmarks.
 753         if (top_id > 0) {
 754                 dit = buffer_.getParFromID(top_id);
 755                 if (!dit.atEnd()) {
 756                         dit.pos() = min(dit.paragraph().size(), top_pos);
 757                         // Some slices of the iterator may not be
 758                         // reachable (e.g. closed collapsable inset)
 759                         // so the dociterator may need to be
 760                         // shortened. Otherwise, setCursor may crash
 761                         // lyx when the cursor can not be set to these
 762                         // insets.
 763                         size_t const n = dit.depth();
 764                         for (size_t i = 0; i < n; ++i)
 765                                 if (!dit[i].inset().editable()) {
 766                                         dit.resize(i);
 767                                         break;
 768                                 }
 769                         success = true;
 770                 }
 771         }
 772
 773         // if top_id == 0, or searching through top_id failed
 774         // This is the case for a 'restored' bookmark when only bottom
 775         // (document level) pit was saved. Because of this, bookmark
 776         // restoration is inaccurate. If a bookmark was within an inset,
 777         // it will be restored to the left of the outmost inset that contains
 778         // the bookmark.
 779         if (bottom_pit < int(buffer_.paragraphs().size())) {
 780                 dit = doc_iterator_begin(&buffer_);
 781
 782                 dit.pit() = bottom_pit;
 783                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 784                 success = true;
 785         }
 786
 787         if (success) {
 788                 // Note: only bottom (document) level pit is set.
 789                 setCursor(dit);
 790                 // set the current font.
 791                 d->cursor_.setCurrentFont();
 792                 // To center the screen on this new position we need the
 793                 // paragraph position which is computed at draw() time.
 794                 // So we need a redraw!
 795                 buffer_.changed(false);
 796                 if (fitCursor())
 797                         showCursor();
 798         }
 799
 800         return success;
 801 }
 802
 803
 804 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 805 {
 806         if (d->cursor_.real_current_font.isRightToLeft()) {
 807                 if (d->intl_.keymap == Intl::PRIMARY)
 808                         d->intl_.keyMapSec();
 809         } else {
 810                 if (d->intl_.keymap == Intl::SECONDARY)
 811                         d->intl_.keyMapPrim();
 812         }
 813
 814         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 815 }
 816
 817
 818 int BufferView::workWidth() const
 819 {
 820         return width_;
 821 }
 822
 823
 824 void BufferView::recenter()
 825 {
 826         showCursor(d->cursor_, true, true);
 827 }
 828
 829
 830 void BufferView::showCursor()
 831 {
 832         showCursor(d->cursor_, false, true);
 833 }
 834
 835
 836 void BufferView::showCursor(DocIterator const & dit,
 837         bool recenter, bool update)
 838 {
 839         if (scrollToCursor(dit, recenter) && update) {
 840                 buffer_.changed(true);
 841                 updateHoveredInset();
 842         }
 843 }
 844
 845
 846 void BufferView::scrollToCursor()
 847 {
 848         if (scrollToCursor(d->cursor_, false)) {
 849                 buffer_.changed(true);
 850                 updateHoveredInset();
 851         }
 852 }
 853
 854
 855 bool BufferView::scrollToCursor(DocIterator const & dit, bool recenter)
 856 {
 857         // We are not properly started yet, delay until resizing is
 858         // done.
 859         if (height_ == 0)
 860                 return false;
 861
 862         LYXERR(Debug::SCROLLING, "recentering!");
 863
 864         CursorSlice const & bot = dit.bottom();
 865         TextMetrics & tm = d->text_metrics_[bot.text()];
 866
 867         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 868         int bot_pit = bot.pit();
 869         if (bot_pit > max_pit) {
 870                 // FIXME: Why does this happen?
 871                 LYXERR0("bottom pit is greater that max pit: "
 872                         << bot_pit << " > " << max_pit);
 873                 bot_pit = max_pit;
 874         }
 875
 876         if (bot_pit == tm.first().first - 1)
 877                 tm.newParMetricsUp();
 878         else if (bot_pit == tm.last().first + 1)
 879                 tm.newParMetricsDown();
 880
 881         if (tm.contains(bot_pit)) {
 882                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 883                 LBUFERR(!pm.rows().empty());
 884                 // FIXME: smooth scrolling doesn't work in mathed.
 885                 CursorSlice const & cs = dit.innerTextSlice();
 886                 int offset = coordOffset(dit).y_;
 887                 int ypos = pm.position() + offset;
 888                 Dimension const & row_dim =
 889                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 890                 int scrolled = 0;
 891                 if (recenter)
 892                         scrolled = scroll(ypos - height_/2);
 893
 894                 // We try to visualize the whole row, if the row height is larger than
 895                 // the screen height, we scroll to a heuristic value of height_ / 4.
 896                 // FIXME: This heuristic value should be replaced by a recursive search
 897                 // for a row in the inset that can be visualized completely.
 898                 else if (row_dim.height() > height_) {
 899                         if (ypos < defaultRowHeight())
 900                                 scrolled = scroll(ypos - height_ / 4);
 901                         else if (ypos > height_ - defaultRowHeight())
 902                                 scrolled = scroll(ypos - 3 * height_ / 4);
 903                 }
 904
 905                 // If the top part of the row falls of the screen, we scroll
 906                 // up to align the top of the row with the top of the screen.
 907                 else if (ypos - row_dim.ascent() < 0 && ypos < height_) {
 908                         int ynew = row_dim.ascent();
 909                         scrolled = scrollUp(ynew - ypos);
 910                 }
 911
 912                 // If the bottom of the row falls of the screen, we scroll down.
 913                 else if (ypos + row_dim.descent() > height_ && ypos > 0) {
 914                         int ynew = height_ - row_dim.descent();
 915                         scrolled = scrollDown(ypos - ynew);
 916                 }
 917
 918                 // else, nothing to do, the cursor is already visible so we just return.
 919                 return scrolled != 0;
 920         }
 921
 922         // fix inline completion position
 923         if (d->inlineCompletionPos_.fixIfBroken())
 924                 d->inlineCompletionPos_ = DocIterator();
 925
 926         tm.redoParagraph(bot_pit);
 927         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 928         int offset = coordOffset(dit).y_;
 929
 930         d->anchor_pit_ = bot_pit;
 931         CursorSlice const & cs = dit.innerTextSlice();
 932         Dimension const & row_dim =
 933                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 934
 935         if (recenter)
 936                 d->anchor_ypos_ = height_/2;
 937         else if (d->anchor_pit_ == 0)
 938                 d->anchor_ypos_ = offset + pm.ascent();
 939         else if (d->anchor_pit_ == max_pit)
 940                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
 941         else if (offset > height_)
 942                 d->anchor_ypos_ = height_ - offset - defaultRowHeight();
 943         else
 944                 d->anchor_ypos_ = defaultRowHeight() * 2;
 945
 946         return true;
 947 }
 948
 949
 950 void BufferView::makeDocumentClass()
 951 {
 952         DocumentClassConstPtr olddc = buffer_.params().documentClassPtr();
 953         buffer_.params().makeDocumentClass();
 954         updateDocumentClass(olddc);
 955 }
 956
 957
 958 void BufferView::updateDocumentClass(DocumentClassConstPtr olddc)
 959 {
 960         message(_("Converting document to new document class..."));
 961
 962         StableDocIterator backcur(d->cursor_);
 963         ErrorList & el = buffer_.errorList("Class Switch");
 964         cap::switchBetweenClasses(
 965                         olddc, buffer_.params().documentClassPtr(),
 966                         static_cast<InsetText &>(buffer_.inset()), el);
 967
 968         setCursor(backcur.asDocIterator(&buffer_));
 969
 970         buffer_.errors("Class Switch");
 971 }
 972
 973
 974 /** Return the change status at cursor position, taking in account the
 975  * status at each level of the document iterator (a table in a deleted
 976  * footnote is deleted).
 977  * When \param outer is true, the top slice is not looked at.
 978  */
 979 static Change::Type lookupChangeType(DocIterator const & dit, bool outer = false)
 980 {
 981         size_t const depth = dit.depth() - (outer ? 1 : 0);
 982
 983         for (size_t i = 0 ; i < depth ; ++i) {
 984                 CursorSlice const & slice = dit[i];
 985                 if (!slice.inset().inMathed()
 986                     && slice.pos() < slice.paragraph().size()) {
 987                         Change::Type const ch = slice.paragraph().lookupChange(slice.pos()).type;
 988                         if (ch != Change::UNCHANGED)
 989                                 return ch;
 990                 }
 991         }
 992         return Change::UNCHANGED;
 993 }
 994
 995
 996 bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
 997 {
 998         FuncCode const act = cmd.action();
 999
1000         // Can we use a readonly buffer?
1001         if (buffer_.isReadonly()
1002             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
1003             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
1004                 flag.message(from_utf8(N_("Document is read-only")));
1005                 flag.setEnabled(false);
1006                 return true;
1007         }
1008
1009         // Are we in a DELETED change-tracking region?
1010         if (lookupChangeType(d->cursor_, true) == Change::DELETED
1011             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
1012             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
1013                 flag.message(from_utf8(N_("This portion of the document is deleted.")));
1014                 flag.setEnabled(false);
1015                 return true;
1016         }
1017
1018         Cursor & cur = d->cursor_;
1019
1020         if (cur.getStatus(cmd, flag))
1021                 return true;
1022
1023         switch (act) {
1024
1025         // FIXME: This is a bit problematic because we don't check if this is
1026         // a document BufferView or not for these LFUNs. We probably have to
1027         // dispatch both to currentBufferView() and, if that fails,
1028         // to documentBufferView(); same as we do now for current Buffer and
1029         // document Buffer. Ideally those LFUN should go to Buffer as they
1030         // operate on the full Buffer and the cursor is only needed either for
1031         // an Undo record or to restore a cursor position. But we don't know
1032         // how to do that inside Buffer of course.
1033         case LFUN_BUFFER_PARAMS_APPLY:
1034         case LFUN_LAYOUT_MODULES_CLEAR:
1035         case LFUN_LAYOUT_MODULE_ADD:
1036         case LFUN_LAYOUT_RELOAD:
1037         case LFUN_TEXTCLASS_APPLY:
1038         case LFUN_TEXTCLASS_LOAD:
1039                 flag.setEnabled(!buffer_.isReadonly());
1040                 break;
1041
1042         case LFUN_UNDO:
1043                 // We do not use the LyXAction flag for readonly because Undo sets the
1044                 // buffer clean/dirty status by itself.
1045                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasUndoStack());
1046                 break;
1047         case LFUN_REDO:
1048                 // We do not use the LyXAction flag for readonly because Redo sets the
1049                 // buffer clean/dirty status by itself.
1050                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasRedoStack());
1051                 break;
1052         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
1053         case LFUN_FILE_INSERT_PLAINTEXT: {
1054                 docstring const fname = cmd.argument();
1055                 if (!FileName::isAbsolute(to_utf8(fname))) {
1056                         flag.message(_("Absolute filename expected."));
1057                         return false;
1058                 }
1059                 flag.setEnabled(cur.inTexted());
1060                 break;
1061         }
1062         case LFUN_FILE_INSERT:
1063         case LFUN_BOOKMARK_SAVE:
1064                 // FIXME: Actually, these LFUNS should be moved to Text
1065                 flag.setEnabled(cur.inTexted());
1066                 break;
1067
1068         case LFUN_FONT_STATE:
1069         case LFUN_LABEL_INSERT:
1070         case LFUN_INFO_INSERT:
1071         case LFUN_PARAGRAPH_GOTO:
1072         case LFUN_NOTE_NEXT:
1073         case LFUN_REFERENCE_NEXT:
1074         case LFUN_WORD_FIND:
1075         case LFUN_WORD_FIND_FORWARD:
1076         case LFUN_WORD_FIND_BACKWARD:
1077         case LFUN_WORD_REPLACE:
1078         case LFUN_MARK_OFF:
1079         case LFUN_MARK_ON:
1080         case LFUN_MARK_TOGGLE:
1081         case LFUN_SCREEN_RECENTER:
1082         case LFUN_SCREEN_SHOW_CURSOR:
1083         case LFUN_BIBTEX_DATABASE_ADD:
1084         case LFUN_BIBTEX_DATABASE_DEL:
1085         case LFUN_STATISTICS:
1086         case LFUN_KEYMAP_OFF:
1087         case LFUN_KEYMAP_PRIMARY:
1088         case LFUN_KEYMAP_SECONDARY:
1089         case LFUN_KEYMAP_TOGGLE:
1090         case LFUN_INSET_SELECT_ALL:
1091                 flag.setEnabled(true);
1092                 break;
1093
1094         case LFUN_WORD_FINDADV: {
1095                 FindAndReplaceOptions opt;
1096                 istringstream iss(to_utf8(cmd.argument()));
1097                 iss >> opt;
1098                 flag.setEnabled(opt.repl_buf_name.empty()
1099                                 || !buffer_.isReadonly());
1100         }
1101
1102         case LFUN_LABEL_GOTO: {
1103                 flag.setEnabled(!cmd.argument().empty()
1104                     || getInsetByCode<InsetRef>(cur, REF_CODE));
1105                 break;
1106         }
1107
1108         case LFUN_CHANGES_TRACK:
1109                 flag.setEnabled(true);
1110                 flag.setOnOff(buffer_.params().track_changes);
1111                 break;
1112
1113         case LFUN_CHANGES_OUTPUT:
1114                 flag.setEnabled(true);
1115                 flag.setOnOff(buffer_.params().output_changes);
1116                 break;
1117
1118         case LFUN_CHANGES_MERGE:
1119         case LFUN_CHANGE_NEXT:
1120         case LFUN_CHANGE_PREVIOUS:
1121         case LFUN_ALL_CHANGES_ACCEPT:
1122         case LFUN_ALL_CHANGES_REJECT:
1123                 // TODO: context-sensitive enabling of LFUNs
1124                 // In principle, these command should only be enabled if there
1125                 // is a change in the document. However, without proper
1126                 // optimizations, this will inevitably result in poor performance.
1127                 flag.setEnabled(true);
1128                 break;
1129
1130         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
1131                 flag.setOnOff(buffer_.params().compressed);
1132                 break;
1133         }
1134
1135         case LFUN_BUFFER_TOGGLE_OUTPUT_SYNC: {
1136                 flag.setOnOff(buffer_.params().output_sync);
1137                 break;
1138         }
1139
1140         case LFUN_SCREEN_UP:
1141         case LFUN_SCREEN_DOWN:
1142         case LFUN_SCROLL:
1143         case LFUN_SCREEN_UP_SELECT:
1144         case LFUN_SCREEN_DOWN_SELECT:
1145         case LFUN_INSET_FORALL:
1146                 flag.setEnabled(true);
1147                 break;
1148
1149         case LFUN_LAYOUT_TABULAR:
1150                 flag.setEnabled(cur.innerInsetOfType(TABULAR_CODE));
1151                 break;
1152
1153         case LFUN_LAYOUT:
1154                 flag.setEnabled(!cur.inset().forcePlainLayout(cur.idx()));
1155                 break;
1156
1157         case LFUN_LAYOUT_PARAGRAPH:
1158                 flag.setEnabled(cur.inset().allowParagraphCustomization(cur.idx()));
1159                 break;
1160
1161         case LFUN_BRANCH_ADD_INSERT:
1162                 flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
1163                 break;
1164
1165         case LFUN_DIALOG_SHOW_NEW_INSET:
1166                 // FIXME: this is wrong, but I do not understand the
1167                 // intent (JMarc)
1168                 if (cur.inset().lyxCode() == CAPTION_CODE)
1169                         return cur.inset().getStatus(cur, cmd, flag);
1170                 // FIXME we should consider passthru paragraphs too.
1171                 flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
1172                 break;
1173
1174         case LFUN_CITATION_INSERT: {
1175                 FuncRequest fr(LFUN_INSET_INSERT, "citation");
1176                 // FIXME: This could turn in a recursive hell.
1177                 // Shouldn't we use Buffer::getStatus() instead?
1178                 flag.setEnabled(lyx::getStatus(fr).enabled());
1179                 break;
1180         }
1181         case LFUN_INSET_APPLY: {
1182                 string const name = cmd.getArg(0);
1183                 Inset * inset = editedInset(name);
1184                 if (inset) {
1185                         FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1186                         if (!inset->getStatus(cur, fr, flag)) {
1187                                 // Every inset is supposed to handle this
1188                                 LASSERT(false, break);
1189                         }
1190                 } else {
1191                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1192                         flag = lyx::getStatus(fr);
1193                 }
1194                 break;
1195         }
1196
1197         default:
1198                 return false;
1199         }
1200
1201         return true;
1202 }
1203
1204
1205 Inset * BufferView::editedInset(string const & name) const
1206 {
1207         map<string, Inset *>::const_iterator it = d->edited_insets_.find(name);
1208         return it == d->edited_insets_.end() ? 0 : it->second;
1209 }
1210
1211
1212 void BufferView::editInset(string const & name, Inset * inset)
1213 {
1214         d->edited_insets_[name] = inset;
1215 }
1216
1217
1218 void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
1219 {
1220         LYXERR(Debug::ACTION, "BufferView::dispatch: cmd: " << cmd);
1221
1222         string const argument = to_utf8(cmd.argument());
1223         Cursor & cur = d->cursor_;
1224
1225         // Don't dispatch function that does not apply to internal buffers.
1226         if (buffer_.isInternal()
1227             && lyxaction.funcHasFlag(cmd.action(), LyXAction::NoInternal))
1228                 return;
1229
1230         // We'll set this back to false if need be.
1231         bool dispatched = true;
1232         buffer_.undo().beginUndoGroup();
1233
1234         FuncCode const act = cmd.action();
1235         switch (act) {
1236
1237         case LFUN_BUFFER_PARAMS_APPLY: {
1238                 DocumentClassConstPtr olddc = buffer_.params().documentClassPtr();
1239                 cur.recordUndoFullDocument();
1240                 istringstream ss(to_utf8(cmd.argument()));
1241                 Lexer lex;
1242                 lex.setStream(ss);
1243                 int const unknown_tokens = buffer_.readHeader(lex);
1244                 if (unknown_tokens != 0) {
1245                         LYXERR0("Warning in LFUN_BUFFER_PARAMS_APPLY!\n"
1246                                                 << unknown_tokens << " unknown token"
1247                                                 << (unknown_tokens == 1 ? "" : "s"));
1248                 }
1249                 updateDocumentClass(olddc);
1250
1251                 // We are most certainly here because of a change in the document
1252                 // It is then better to make sure that all dialogs are in sync with
1253                 // current document settings.
1254                 dr.screenUpdate(Update::Force | Update::FitCursor);
1255                 dr.forceBufferUpdate();
1256                 break;
1257         }
1258
1259         case LFUN_LAYOUT_MODULES_CLEAR: {
1260                 cur.recordUndoFullDocument();
1261                 buffer_.params().clearLayoutModules();
1262                 makeDocumentClass();
1263                 dr.screenUpdate(Update::Force);
1264                 dr.forceBufferUpdate();
1265                 break;
1266         }
1267
1268         case LFUN_LAYOUT_MODULE_ADD: {
1269                 BufferParams const & params = buffer_.params();
1270                 if (!params.layoutModuleCanBeAdded(argument)) {
1271                         LYXERR0("Module `" << argument <<
1272                                 "' cannot be added due to failed requirements or "
1273                                 "conflicts with installed modules.");
1274                         break;
1275                 }
1276                 cur.recordUndoFullDocument();
1277                 buffer_.params().addLayoutModule(argument);
1278                 makeDocumentClass();
1279                 dr.screenUpdate(Update::Force);
1280                 dr.forceBufferUpdate();
1281                 break;
1282         }
1283
1284         case LFUN_TEXTCLASS_APPLY: {
1285                 // since this shortcircuits, the second call is made only if
1286                 // the first fails
1287                 bool const success =
1288                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1289                         LayoutFileList::get().load(argument, buffer_.filePath());
1290                 if (!success) {
1291                         docstring s = bformat(_("The document class `%1$s' "
1292                                                  "could not be loaded."), from_utf8(argument));
1293                         frontend::Alert::error(_("Could not load class"), s);
1294                         break;
1295                 }
1296
1297                 LayoutFile const * old_layout = buffer_.params().baseClass();
1298                 LayoutFile const * new_layout = &(LayoutFileList::get()[argument]);
1299
1300                 if (old_layout == new_layout)
1301                         // nothing to do
1302                         break;
1303
1304                 // Save the old, possibly modular, layout for use in conversion.
1305                 cur.recordUndoFullDocument();
1306                 buffer_.params().setBaseClass(argument);
1307                 makeDocumentClass();
1308                 dr.screenUpdate(Update::Force);
1309                 dr.forceBufferUpdate();
1310                 break;
1311         }
1312
1313         case LFUN_TEXTCLASS_LOAD: {
1314                 // since this shortcircuits, the second call is made only if
1315                 // the first fails
1316                 bool const success =
1317                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1318                         LayoutFileList::get().load(argument, buffer_.filePath());
1319                 if (!success) {
1320                         docstring s = bformat(_("The document class `%1$s' "
1321                                                  "could not be loaded."), from_utf8(argument));
1322                         frontend::Alert::error(_("Could not load class"), s);
1323                 }
1324                 break;
1325         }
1326
1327         case LFUN_LAYOUT_RELOAD: {
1328                 LayoutFileIndex bc = buffer_.params().baseClassID();
1329                 LayoutFileList::get().reset(bc);
1330                 buffer_.params().setBaseClass(bc);
1331                 makeDocumentClass();
1332                 dr.screenUpdate(Update::Force);
1333                 dr.forceBufferUpdate();
1334                 break;
1335         }
1336
1337         case LFUN_UNDO:
1338                 dr.setMessage(_("Undo"));
1339                 cur.clearSelection();
1340                 if (!cur.textUndo())
1341                         dr.setMessage(_("No further undo information"));
1342                 else
1343                         dr.screenUpdate(Update::Force | Update::FitCursor);
1344                 dr.forceBufferUpdate();
1345                 break;
1346
1347         case LFUN_REDO:
1348                 dr.setMessage(_("Redo"));
1349                 cur.clearSelection();
1350                 if (!cur.textRedo())
1351                         dr.setMessage(_("No further redo information"));
1352                 else
1353                         dr.screenUpdate(Update::Force | Update::FitCursor);
1354                 dr.forceBufferUpdate();
1355                 break;
1356
1357         case LFUN_FONT_STATE:
1358                 dr.setMessage(cur.currentState());
1359                 break;
1360
1361         case LFUN_BOOKMARK_SAVE:
1362                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1363                 break;
1364
1365         case LFUN_LABEL_GOTO: {
1366                 docstring label = cmd.argument();
1367                 if (label.empty()) {
1368                         InsetRef * inset =
1369                                 getInsetByCode<InsetRef>(cur, REF_CODE);
1370                         if (inset) {
1371                                 label = inset->getParam("reference");
1372                                 // persistent=false: use temp_bookmark
1373                                 saveBookmark(0);
1374                         }
1375                 }
1376                 if (!label.empty()) {
1377                         gotoLabel(label);
1378                         // at the moment, this is redundant, since gotoLabel will
1379                         // eventually call LFUN_PARAGRAPH_GOTO, but it seems best
1380                         // to have it here.
1381                         dr.screenUpdate(Update::Force | Update::FitCursor);
1382                 }
1383                 break;
1384         }
1385
1386         case LFUN_PARAGRAPH_GOTO: {
1387                 int const id = convert<int>(cmd.getArg(0));
1388                 int const pos = convert<int>(cmd.getArg(1));
1389                 int i = 0;
1390                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1391                         b = theBufferList().next(b)) {
1392
1393                         DocIterator dit = b->getParFromID(id);
1394                         if (dit.atEnd()) {
1395                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1396                                 ++i;
1397                                 continue;
1398                         }
1399                         LYXERR(Debug::INFO, "Paragraph " << dit.paragraph().id()
1400                                 << " found in buffer `"
1401                                 << b->absFileName() << "'.");
1402
1403                         if (b == &buffer_) {
1404                                 // Set the cursor
1405                                 dit.pos() = pos;
1406                                 setCursor(dit);
1407                                 dr.screenUpdate(Update::Force | Update::FitCursor);
1408                         } else {
1409                                 // Switch to other buffer view and resend cmd
1410                                 lyx::dispatch(FuncRequest(
1411                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1412                                 lyx::dispatch(cmd);
1413                         }
1414                         break;
1415                 }
1416                 break;
1417         }
1418
1419         case LFUN_NOTE_NEXT:
1420                 gotoInset(this, NOTE_CODE, false);
1421                 break;
1422
1423         case LFUN_REFERENCE_NEXT: {
1424                 vector<InsetCode> tmp;
1425                 tmp.push_back(LABEL_CODE);
1426                 tmp.push_back(REF_CODE);
1427                 gotoInset(this, tmp, true);
1428                 break;
1429         }
1430
1431         case LFUN_CHANGES_TRACK:
1432                 buffer_.params().track_changes = !buffer_.params().track_changes;
1433                 break;
1434
1435         case LFUN_CHANGES_OUTPUT:
1436                 buffer_.params().output_changes = !buffer_.params().output_changes;
1437                 if (buffer_.params().output_changes) {
1438                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
1439                         bool xcolorulem = LaTeXFeatures::isAvailable("ulem") &&
1440                                           LaTeXFeatures::isAvailable("xcolor");
1441
1442                         if (!dvipost && !xcolorulem) {
1443                                 Alert::warning(_("Changes not shown in LaTeX output"),
1444                                                _("Changes will not be highlighted in LaTeX output, "
1445                                                  "because neither dvipost nor xcolor/ulem are installed.\n"
1446                                                  "Please install these packages or redefine "
1447                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1448                         } else if (!xcolorulem) {
1449                                 Alert::warning(_("Changes not shown in LaTeX output"),
1450                                                _("Changes will not be highlighted in LaTeX output "
1451                                                  "when using pdflatex, because xcolor and ulem are not installed.\n"
1452                                                  "Please install both packages or redefine "
1453                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1454                         }
1455                 }
1456                 break;
1457
1458         case LFUN_CHANGE_NEXT:
1459                 findNextChange(this);
1460                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1461                 dr.screenUpdate(Update::Force | Update::FitCursor);
1462                 break;
1463
1464         case LFUN_CHANGE_PREVIOUS:
1465                 findPreviousChange(this);
1466                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1467                 dr.screenUpdate(Update::Force | Update::FitCursor);
1468                 break;
1469
1470         case LFUN_CHANGES_MERGE:
1471                 if (findNextChange(this) || findPreviousChange(this)) {
1472                         dr.screenUpdate(Update::Force | Update::FitCursor);
1473                         dr.forceBufferUpdate();
1474                         showDialog("changes");
1475                 }
1476                 break;
1477
1478         case LFUN_ALL_CHANGES_ACCEPT:
1479                 // select complete document
1480                 cur.reset();
1481                 cur.selHandle(true);
1482                 buffer_.text().cursorBottom(cur);
1483                 // accept everything in a single step to support atomic undo
1484                 buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
1485                 cur.resetAnchor();
1486                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1487                 dr.screenUpdate(Update::Force | Update::FitCursor);
1488                 dr.forceBufferUpdate();
1489                 break;
1490
1491         case LFUN_ALL_CHANGES_REJECT:
1492                 // select complete document
1493                 cur.reset();
1494                 cur.selHandle(true);
1495                 buffer_.text().cursorBottom(cur);
1496                 // reject everything in a single step to support atomic undo
1497                 // Note: reject does not work recursively; the user may have to repeat the operation
1498                 buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
1499                 cur.resetAnchor();
1500                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1501                 dr.screenUpdate(Update::Force | Update::FitCursor);
1502                 dr.forceBufferUpdate();
1503                 break;
1504
1505         case LFUN_WORD_FIND_FORWARD:
1506         case LFUN_WORD_FIND_BACKWARD: {
1507                 // FIXME THREAD
1508                 // Would it maybe be better if this variable were view specific anyway?
1509                 static docstring last_search;
1510                 docstring searched_string;
1511
1512                 if (!cmd.argument().empty()) {
1513                         last_search = cmd.argument();
1514                         searched_string = cmd.argument();
1515                 } else {
1516                         searched_string = last_search;
1517                 }
1518
1519                 if (searched_string.empty())
1520                         break;
1521
1522                 bool const fw = act == LFUN_WORD_FIND_FORWARD;
1523                 docstring const data =
1524                         find2string(searched_string, true, false, fw);
1525                 bool found = lyxfind(this, FuncRequest(LFUN_WORD_FIND, data));
1526                 if (found) {
1527                         dr.screenUpdate(Update::Force | Update::FitCursor);
1528                         cur.dispatched();
1529                         dispatched = true;
1530                 } else {
1531                         cur.undispatched();
1532                         dispatched = false;
1533                 }
1534                 break;
1535         }
1536
1537         case LFUN_WORD_FIND: {
1538                 FuncRequest req = cmd;
1539                 if (cmd.argument().empty() && !d->search_request_cache_.argument().empty())
1540                         req = d->search_request_cache_;
1541                 if (req.argument().empty()) {
1542                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
1543                         break;
1544                 }
1545                 if (lyxfind(this, req)) {
1546                         dr.screenUpdate(Update::Force | Update::FitCursor);
1547                         cur.dispatched();
1548                         dispatched = true;
1549                 } else {
1550                         cur.undispatched();
1551                         dispatched = false;
1552                 }
1553                 d->search_request_cache_ = req;
1554                 break;
1555         }
1556
1557         case LFUN_WORD_REPLACE: {
1558                 bool has_deleted = false;
1559                 if (cur.selection()) {
1560                         DocIterator beg = cur.selectionBegin();
1561                         DocIterator end = cur.selectionEnd();
1562                         if (beg.pit() == end.pit()) {
1563                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1564                                         if (!cur.inMathed() && cur.paragraph().isDeleted(p)) {
1565                                                 has_deleted = true;
1566                                                 break;
1567                                         }
1568                                 }
1569                         }
1570                 }
1571                 if (lyxreplace(this, cmd, has_deleted)) {
1572                         dr.forceBufferUpdate();
1573                         dr.screenUpdate(Update::Force | Update::FitCursor);
1574                         cur.dispatched();
1575                         dispatched = true;
1576                 } else {
1577                         cur.undispatched();
1578                         dispatched = false;
1579                 }
1580                 break;
1581         }
1582
1583         case LFUN_WORD_FINDADV: {
1584                 FindAndReplaceOptions opt;
1585                 istringstream iss(to_utf8(cmd.argument()));
1586                 iss >> opt;
1587                 if (findAdv(this, opt)) {
1588                         dr.screenUpdate(Update::Force | Update::FitCursor);
1589                         cur.dispatched();
1590                         dispatched = true;
1591                 } else {
1592                         cur.undispatched();
1593                         dispatched = false;
1594                 }
1595                 break;
1596         }
1597
1598         case LFUN_MARK_OFF:
1599                 cur.clearSelection();
1600                 dr.setMessage(from_utf8(N_("Mark off")));
1601                 break;
1602
1603         case LFUN_MARK_ON:
1604                 cur.clearSelection();
1605                 cur.setMark(true);
1606                 dr.setMessage(from_utf8(N_("Mark on")));
1607                 break;
1608
1609         case LFUN_MARK_TOGGLE:
1610                 cur.setSelection(false);
1611                 if (cur.mark()) {
1612                         cur.setMark(false);
1613                         dr.setMessage(from_utf8(N_("Mark removed")));
1614                 } else {
1615                         cur.setMark(true);
1616                         dr.setMessage(from_utf8(N_("Mark set")));
1617                 }
1618                 cur.resetAnchor();
1619                 break;
1620
1621         case LFUN_SCREEN_SHOW_CURSOR:
1622                 showCursor();
1623                 break;
1624
1625         case LFUN_SCREEN_RECENTER:
1626                 recenter();
1627                 break;
1628
1629         case LFUN_BIBTEX_DATABASE_ADD: {
1630                 Cursor tmpcur = cur;
1631                 findInset(tmpcur, BIBTEX_CODE, false);
1632                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1633                                                 BIBTEX_CODE);
1634                 if (inset) {
1635                         if (inset->addDatabase(cmd.argument())) {
1636                                 buffer_.invalidateBibfileCache();
1637                                 dr.forceBufferUpdate();
1638                         }
1639                 }
1640                 break;
1641         }
1642
1643         case LFUN_BIBTEX_DATABASE_DEL: {
1644                 Cursor tmpcur = cur;
1645                 findInset(tmpcur, BIBTEX_CODE, false);
1646                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1647                                                 BIBTEX_CODE);
1648                 if (inset) {
1649                         if (inset->delDatabase(cmd.argument())) {
1650                                 buffer_.invalidateBibfileCache();
1651                                 dr.forceBufferUpdate();
1652                         }
1653                 }
1654                 break;
1655         }
1656
1657         case LFUN_STATISTICS: {
1658                 DocIterator from, to;
1659                 if (cur.selection()) {
1660                         from = cur.selectionBegin();
1661                         to = cur.selectionEnd();
1662                 } else {
1663                         from = doc_iterator_begin(&buffer_);
1664                         to = doc_iterator_end(&buffer_);
1665                 }
1666                 buffer_.updateStatistics(from, to);
1667                 int const words = buffer_.wordCount();
1668                 int const chars = buffer_.charCount(false);
1669                 int const chars_blanks = buffer_.charCount(true);
1670                 docstring message;
1671                 if (cur.selection())
1672                         message = _("Statistics for the selection:");
1673                 else
1674                         message = _("Statistics for the document:");
1675                 message += "\n\n";
1676                 if (words != 1)
1677                         message += bformat(_("%1$d words"), words);
1678                 else
1679                         message += _("One word");
1680                 message += "\n";
1681                 if (chars_blanks != 1)
1682                         message += bformat(_("%1$d characters (including blanks)"),
1683                                           chars_blanks);
1684                 else
1685                         message += _("One character (including blanks)");
1686                 message += "\n";
1687                 if (chars != 1)
1688                         message += bformat(_("%1$d characters (excluding blanks)"),
1689                                           chars);
1690                 else
1691                         message += _("One character (excluding blanks)");
1692
1693                 Alert::information(_("Statistics"), message);
1694         }
1695                 break;
1696
1697         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1698                 // turn compression on/off
1699                 buffer_.params().compressed = !buffer_.params().compressed;
1700                 break;
1701
1702         case LFUN_BUFFER_TOGGLE_OUTPUT_SYNC:
1703                 buffer_.params().output_sync = !buffer_.params().output_sync;
1704                 break;
1705
1706         case LFUN_SCREEN_UP:
1707         case LFUN_SCREEN_DOWN: {
1708                 Point p = getPos(cur);
1709                 // This code has been commented out to enable to scroll down a
1710                 // document, even if there are large insets in it (see bug #5465).
1711                 /*if (p.y_ < 0 || p.y_ > height_) {
1712                         // The cursor is off-screen so recenter before proceeding.
1713                         showCursor();
1714                         p = getPos(cur);
1715                 }*/
1716                 int const scrolled = scroll(act == LFUN_SCREEN_UP
1717                         ? -height_ : height_);
1718                 if (act == LFUN_SCREEN_UP && scrolled > -height_)
1719                         p = Point(0, 0);
1720                 if (act == LFUN_SCREEN_DOWN && scrolled < height_)
1721                         p = Point(width_, height_);
1722                 Cursor old = cur;
1723                 bool const in_texted = cur.inTexted();
1724                 cur.setCursor(doc_iterator_begin(cur.buffer()));
1725                 cur.selHandle(false);
1726                 buffer_.changed(true);
1727                 updateHoveredInset();
1728
1729                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
1730                         true, act == LFUN_SCREEN_UP);
1731                 //FIXME: what to do with cur.x_target()?
1732                 bool update = in_texted && cur.bv().checkDepm(cur, old);
1733                 cur.finishUndo();
1734
1735                 if (update || cur.mark())
1736                         dr.screenUpdate(Update::Force | Update::FitCursor);
1737                 if (update)
1738                         dr.forceBufferUpdate();
1739                 break;
1740         }
1741
1742         case LFUN_SCROLL: {
1743                 string const scroll_type = cmd.getArg(0);
1744                 int scroll_step = 0;
1745                 if (scroll_type == "line")
1746                         scroll_step = d->scrollbarParameters_.single_step;
1747                 else if (scroll_type == "page")
1748                         scroll_step = d->scrollbarParameters_.page_step;
1749                 else
1750                         return;
1751                 string const scroll_quantity = cmd.getArg(1);
1752                 if (scroll_quantity == "up")
1753                         scrollUp(scroll_step);
1754                 else if (scroll_quantity == "down")
1755                         scrollDown(scroll_step);
1756                 else {
1757                         int const scroll_value = convert<int>(scroll_quantity);
1758                         if (scroll_value)
1759                                 scroll(scroll_step * scroll_value);
1760                 }
1761                 buffer_.changed(true);
1762                 updateHoveredInset();
1763                 dr.forceBufferUpdate();
1764                 break;
1765         }
1766
1767         case LFUN_SCREEN_UP_SELECT: {
1768                 // FIXME: why is the algorithm different from LFUN_SCREEN_UP?
1769                 cur.selHandle(true);
1770                 if (isTopScreen()) {
1771                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1772                         cur.finishUndo();
1773                         break;
1774                 }
1775                 int y = getPos(cur).y_;
1776                 int const ymin = y - height_ + defaultRowHeight();
1777                 while (y > ymin && cur.up())
1778                         y = getPos(cur).y_;
1779
1780                 cur.finishUndo();
1781                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1782                 break;
1783         }
1784
1785         case LFUN_SCREEN_DOWN_SELECT: {
1786                 // FIXME: why is the algorithm different from LFUN_SCREEN_DOWN?
1787                 cur.selHandle(true);
1788                 if (isBottomScreen()) {
1789                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1790                         cur.finishUndo();
1791                         break;
1792                 }
1793                 int y = getPos(cur).y_;
1794                 int const ymax = y + height_ - defaultRowHeight();
1795                 while (y < ymax && cur.down())
1796                         y = getPos(cur).y_;
1797
1798                 cur.finishUndo();
1799                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1800                 break;
1801         }
1802
1803
1804         case LFUN_INSET_SELECT_ALL:
1805                 if (cur.depth() > 1
1806                     && cur.selBegin().at_begin()
1807                     && cur.selEnd().at_end()) {
1808                         // All the contents of the inset if selected.
1809                         // Select the inset from outside.
1810                         cur.pop();
1811                         cur.resetAnchor();
1812                         cur.setSelection(true);
1813                         cur.posForward();
1814                 } else if (cur.selBegin().idx() != cur.selEnd().idx()
1815                            || (cur.selBegin().at_cell_begin()
1816                                && cur.selEnd().at_cell_end())) {
1817                         // At least one complete cell is selected.
1818                         // Select all cells
1819                         cur.pos() = 0;
1820                         cur.idx() = 0;
1821                         cur.resetAnchor();
1822                         cur.setSelection(true);
1823                         cur.idx() = cur.lastidx();
1824                         cur.pos() = cur.lastpos();
1825                 } else {
1826                         // select current cell
1827                         cur.pos() = 0;
1828                         cur.resetAnchor();
1829                         cur.setSelection(true);
1830                         cur.pos() = cur.lastpos();
1831                 }
1832                 dr.screenUpdate(Update::Force);
1833                 break;
1834
1835
1836         // This would be in Buffer class if only Cursor did not
1837         // require a bufferview
1838         case LFUN_INSET_FORALL: {
1839                 docstring const name = from_utf8(cmd.getArg(0));
1840                 string const commandstr = cmd.getLongArg(1);
1841                 FuncRequest const fr = lyxaction.lookupFunc(commandstr);
1842
1843                 // an arbitrary number to limit number of iterations
1844                 const int max_iter = 100000;
1845                 int iterations = 0;
1846                 Cursor & cur = d->cursor_;
1847                 Cursor const savecur = cur;
1848                 cur.reset();
1849                 if (!cur.nextInset())
1850                         cur.forwardInset();
1851                 cur.beginUndoGroup();
1852                 while(cur && iterations < max_iter) {
1853                         Inset * const ins = cur.nextInset();
1854                         if (!ins)
1855                                 break;
1856                         docstring insname = ins->layoutName();
1857                         while (!insname.empty()) {
1858                                 if (insname == name || name == from_utf8("*")) {
1859                                         cur.recordUndo();
1860                                         lyx::dispatch(fr, dr);
1861                                         ++iterations;
1862                                         break;
1863                                 }
1864                                 size_t const i = insname.rfind(':');
1865                                 if (i == string::npos)
1866                                         break;
1867                                 insname = insname.substr(0, i);
1868                         }
1869                         // if we did not delete the inset, skip it
1870                         if (!cur.nextInset() || cur.nextInset() == ins)
1871                                 cur.forwardInset();
1872                 }
1873                 cur.endUndoGroup();
1874                 cur = savecur;
1875                 cur.fixIfBroken();
1876                 dr.screenUpdate(Update::Force);
1877                 dr.forceBufferUpdate();
1878
1879                 if (iterations >= max_iter) {
1880                         dr.setError(true);
1881                         dr.setMessage(bformat(_("`inset-forall' interrupted because number of actions is larger than %1$d"), max_iter));
1882                 } else
1883                         dr.setMessage(bformat(_("Applied \"%1$s\" to %2$d insets"), from_utf8(commandstr), iterations));
1884                 break;
1885         }
1886
1887
1888         case LFUN_BRANCH_ADD_INSERT: {
1889                 docstring branch_name = from_utf8(cmd.getArg(0));
1890                 if (branch_name.empty())
1891                         if (!Alert::askForText(branch_name, _("Branch name")) ||
1892                                                 branch_name.empty())
1893                                 break;
1894
1895                 DispatchResult drtmp;
1896                 buffer_.dispatch(FuncRequest(LFUN_BRANCH_ADD, branch_name), drtmp);
1897                 if (drtmp.error()) {
1898                         Alert::warning(_("Branch already exists"), drtmp.message());
1899                         break;
1900                 }
1901                 BranchList & branch_list = buffer_.params().branchlist();
1902                 vector<docstring> const branches =
1903                         getVectorFromString(branch_name, branch_list.separator());
1904                 for (vector<docstring>::const_iterator it = branches.begin();
1905                      it != branches.end(); ++it) {
1906                         branch_name = *it;
1907                         lyx::dispatch(FuncRequest(LFUN_BRANCH_INSERT, branch_name));
1908                 }
1909                 break;
1910         }
1911
1912         case LFUN_KEYMAP_OFF:
1913                 getIntl().keyMapOn(false);
1914                 break;
1915
1916         case LFUN_KEYMAP_PRIMARY:
1917                 getIntl().keyMapPrim();
1918                 break;
1919
1920         case LFUN_KEYMAP_SECONDARY:
1921                 getIntl().keyMapSec();
1922                 break;
1923
1924         case LFUN_KEYMAP_TOGGLE:
1925                 getIntl().toggleKeyMap();
1926                 break;
1927
1928         case LFUN_DIALOG_SHOW_NEW_INSET: {
1929                 string const name = cmd.getArg(0);
1930                 string data = trim(to_utf8(cmd.argument()).substr(name.size()));
1931                 if (decodeInsetParam(name, data, buffer_))
1932                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, name + " " + data));
1933                 else
1934                         lyxerr << "Inset type '" << name <<
1935                         "' not recognized in LFUN_DIALOG_SHOW_NEW_INSET" <<  endl;
1936                 break;
1937         }
1938
1939         case LFUN_CITATION_INSERT: {
1940                 if (argument.empty()) {
1941                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW_NEW_INSET, "citation"));
1942                         break;
1943                 }
1944                 // we can have one optional argument, delimited by '|'
1945                 // citation-insert <key>|<text_before>
1946                 // this should be enhanced to also support text_after
1947                 // and citation style
1948                 string arg = argument;
1949                 string opt1;
1950                 if (contains(argument, "|")) {
1951                         arg = token(argument, '|', 0);
1952                         opt1 = token(argument, '|', 1);
1953                 }
1954
1955                 // if our cursor is directly in front of or behind a citation inset,
1956                 // we will instead add the new key to it.
1957                 Inset * inset = cur.nextInset();
1958                 if (!inset || inset->lyxCode() != CITE_CODE)
1959                         inset = cur.prevInset();
1960                 if (inset && inset->lyxCode() == CITE_CODE) {
1961                         InsetCitation * icite = static_cast<InsetCitation *>(inset);
1962                         if (icite->addKey(arg)) {
1963                                 dr.forceBufferUpdate();
1964                                 dr.screenUpdate(Update::FitCursor | Update::SinglePar);
1965                                 if (!opt1.empty())
1966                                         LYXERR0("Discarding optional argument to citation-insert.");
1967                         }
1968                         dispatched = true;
1969                         break;
1970                 }
1971                 InsetCommandParams icp(CITE_CODE);
1972                 icp["key"] = from_utf8(arg);
1973                 if (!opt1.empty())
1974                         icp["before"] = from_utf8(opt1);
1975                 string icstr = InsetCommand::params2string(icp);
1976                 FuncRequest fr(LFUN_INSET_INSERT, icstr);
1977                 lyx::dispatch(fr);
1978                 break;
1979         }
1980
1981         case LFUN_INSET_APPLY: {
1982                 string const name = cmd.getArg(0);
1983                 Inset * inset = editedInset(name);
1984                 if (!inset) {
1985                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1986                         lyx::dispatch(fr);
1987                         break;
1988                 }
1989                 // put cursor in front of inset.
1990                 if (!setCursorFromInset(inset)) {
1991                         LASSERT(false, break);
1992                 }
1993                 cur.recordUndo();
1994                 FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1995                 inset->dispatch(cur, fr);
1996                 dr.screenUpdate(cur.result().screenUpdate());
1997                 if (cur.result().needBufferUpdate())
1998                         dr.forceBufferUpdate();
1999                 break;
2000         }
2001
2002         // FIXME:
2003         // The change of language of buffer belongs to the Buffer class.
2004         // We have to do it here because we need a cursor for Undo.
2005         // When Undo::recordUndoBufferParams() is implemented someday
2006         // LFUN_BUFFER_LANGUAGE should be handled by the Buffer class.
2007         case LFUN_BUFFER_LANGUAGE: {
2008                 Language const * oldL = buffer_.params().language;
2009                 Language const * newL = languages.getLanguage(argument);
2010                 if (!newL || oldL == newL)
2011                         break;
2012                 if (oldL->rightToLeft() == newL->rightToLeft()) {
2013                         cur.recordUndoFullDocument();
2014                         buffer_.changeLanguage(oldL, newL);
2015                         cur.setCurrentFont();
2016                         dr.forceBufferUpdate();
2017                 }
2018                 break;
2019         }
2020
2021         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
2022         case LFUN_FILE_INSERT_PLAINTEXT: {
2023                 bool const as_paragraph = (act == LFUN_FILE_INSERT_PLAINTEXT_PARA);
2024                 string const fname = to_utf8(cmd.argument());
2025                 if (!FileName::isAbsolute(fname))
2026                         dr.setMessage(_("Absolute filename expected."));
2027                 else
2028                         insertPlaintextFile(FileName(fname), as_paragraph);
2029                 break;
2030         }
2031
2032         default:
2033                 // OK, so try the Buffer itself...
2034                 buffer_.dispatch(cmd, dr);
2035                 dispatched = dr.dispatched();
2036                 break;
2037         }
2038
2039         buffer_.undo().endUndoGroup();
2040         dr.dispatched(dispatched);
2041 }
2042
2043
2044 docstring const BufferView::requestSelection()
2045 {
2046         Cursor & cur = d->cursor_;
2047
2048         LYXERR(Debug::SELECTION, "requestSelection: cur.selection: " << cur.selection());
2049         if (!cur.selection()) {
2050                 d->xsel_cache_.set = false;
2051                 return docstring();
2052         }
2053
2054         LYXERR(Debug::SELECTION, "requestSelection: xsel_cache.set: " << d->xsel_cache_.set);
2055         if (!d->xsel_cache_.set ||
2056             cur.top() != d->xsel_cache_.cursor ||
2057             cur.realAnchor().top() != d->xsel_cache_.anchor)
2058         {
2059                 d->xsel_cache_.cursor = cur.top();
2060                 d->xsel_cache_.anchor = cur.realAnchor().top();
2061                 d->xsel_cache_.set = cur.selection();
2062                 return cur.selectionAsString(false);
2063         }
2064         return docstring();
2065 }
2066
2067
2068 void BufferView::clearSelection()
2069 {
2070         d->cursor_.clearSelection();
2071         // Clear the selection buffer. Otherwise a subsequent
2072         // middle-mouse-button paste would use the selection buffer,
2073         // not the more current external selection.
2074         cap::clearSelection();
2075         d->xsel_cache_.set = false;
2076         // The buffer did not really change, but this causes the
2077         // redraw we need because we cleared the selection above.
2078         buffer_.changed(false);
2079 }
2080
2081
2082 void BufferView::resize(int width, int height)
2083 {
2084         // Update from work area
2085         width_ = width;
2086         height_ = height;
2087
2088         // Clear the paragraph height cache.
2089         d->par_height_.clear();
2090         // Redo the metrics.
2091         updateMetrics();
2092 }
2093
2094
2095 Inset const * BufferView::getCoveringInset(Text const & text,
2096                 int x, int y) const
2097 {
2098         TextMetrics & tm = d->text_metrics_[&text];
2099         Inset * inset = tm.checkInsetHit(x, y);
2100         if (!inset)
2101                 return 0;
2102
2103         if (!inset->descendable(*this))
2104                 // No need to go further down if the inset is not
2105                 // descendable.
2106                 return inset;
2107
2108         size_t cell_number = inset->nargs();
2109         // Check all the inner cell.
2110         for (size_t i = 0; i != cell_number; ++i) {
2111                 Text const * inner_text = inset->getText(i);
2112                 if (inner_text) {
2113                         // Try deeper.
2114                         Inset const * inset_deeper =
2115                                 getCoveringInset(*inner_text, x, y);
2116                         if (inset_deeper)
2117                                 return inset_deeper;
2118                 }
2119         }
2120
2121         return inset;
2122 }
2123
2124
2125 void BufferView::updateHoveredInset() const
2126 {
2127         // Get inset under mouse, if there is one.
2128         int const x = d->mouse_position_cache_.x_;
2129         int const y = d->mouse_position_cache_.y_;
2130         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
2131
2132         d->clickable_inset_ = covering_inset && covering_inset->clickable(x, y);
2133
2134         if (covering_inset == d->last_inset_)
2135                 // Same inset, no need to do anything...
2136                 return;
2137
2138         bool need_redraw = false;
2139         if (d->last_inset_) {
2140                 // Remove the hint on the last hovered inset (if any).
2141                 need_redraw |= d->last_inset_->setMouseHover(this, false);
2142                 d->last_inset_ = 0;
2143         }
2144
2145         if (covering_inset && covering_inset->setMouseHover(this, true)) {
2146                 need_redraw = true;
2147                 // Only the insets that accept the hover state, do
2148                 // clear the last_inset_, so only set the last_inset_
2149                 // member if the hovered setting is accepted.
2150                 d->last_inset_ = covering_inset;
2151         }
2152
2153         if (need_redraw) {
2154                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
2155                                 << d->mouse_position_cache_.x_ << ", "
2156                                 << d->mouse_position_cache_.y_ << ")");
2157
2158                 d->update_strategy_ = DecorationUpdate;
2159
2160                 // This event (moving without mouse click) is not passed further.
2161                 // This should be changed if it is further utilized.
2162                 buffer_.changed(false);
2163         }
2164 }
2165
2166
2167 void BufferView::clearLastInset(Inset * inset) const
2168 {
2169         if (d->last_inset_ != inset) {
2170                 LYXERR0("Wrong last_inset!");
2171                 LATTEST(false);
2172         }
2173         d->last_inset_ = 0;
2174 }
2175
2176
2177 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
2178 {
2179         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
2180
2181         // This is only called for mouse related events including
2182         // LFUN_FILE_OPEN generated by drag-and-drop.
2183         FuncRequest cmd = cmd0;
2184
2185         Cursor old = cursor();
2186         Cursor cur(*this);
2187         cur.push(buffer_.inset());
2188         cur.setSelection(d->cursor_.selection());
2189
2190         // Either the inset under the cursor or the
2191         // surrounding Text will handle this event.
2192
2193         // make sure we stay within the screen...
2194         cmd.set_y(min(max(cmd.y(), -1), height_));
2195
2196         d->mouse_position_cache_.x_ = cmd.x();
2197         d->mouse_position_cache_.y_ = cmd.y();
2198
2199         if (cmd.action() == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
2200                 updateHoveredInset();
2201                 return;
2202         }
2203
2204         // Build temporary cursor.
2205         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x(), cmd.y());
2206
2207         // Put anchor at the same position.
2208         cur.resetAnchor();
2209
2210         cur.beginUndoGroup();
2211
2212         // Try to dispatch to an non-editable inset near this position
2213         // via the temp cursor. If the inset wishes to change the real
2214         // cursor it has to do so explicitly by using
2215         //  cur.bv().cursor() = cur;  (or similar)
2216         if (inset)
2217                 inset->dispatch(cur, cmd);
2218
2219         // Now dispatch to the temporary cursor. If the real cursor should
2220         // be modified, the inset's dispatch has to do so explicitly.
2221         if (!inset || !cur.result().dispatched())
2222                 cur.dispatch(cmd);
2223
2224         cur.endUndoGroup();
2225
2226         // Notify left insets
2227         if (cur != old) {
2228                 bool badcursor = old.fixIfBroken() | cur.fixIfBroken();
2229                 badcursor |= notifyCursorLeavesOrEnters(old, cur);
2230                 if (badcursor)
2231                         cursor().fixIfBroken();
2232         }
2233
2234         // Do we have a selection?
2235         theSelection().haveSelection(cursor().selection());
2236
2237         if (cur.needBufferUpdate()) {
2238                 cur.clearBufferUpdate();
2239                 buffer().updateBuffer();
2240         }
2241
2242         // If the command has been dispatched,
2243         if (cur.result().dispatched() || cur.result().screenUpdate())
2244                 processUpdateFlags(cur.result().screenUpdate());
2245 }
2246
2247
2248 int BufferView::minVisiblePart()
2249 {
2250         return 2 * defaultRowHeight();
2251 }
2252
2253
2254 int BufferView::scroll(int y)
2255 {
2256         if (y > 0)
2257                 return scrollDown(y);
2258         if (y < 0)
2259                 return scrollUp(-y);
2260         return 0;
2261 }
2262
2263
2264 int BufferView::scrollDown(int offset)
2265 {
2266         Text * text = &buffer_.text();
2267         TextMetrics & tm = d->text_metrics_[text];
2268         int const ymax = height_ + offset;
2269         while (true) {
2270                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
2271                 int bottom_pos = last.second->position() + last.second->descent();
2272                 if (lyxrc.scroll_below_document)
2273                         bottom_pos += height_ - minVisiblePart();
2274                 if (last.first + 1 == int(text->paragraphs().size())) {
2275                         if (bottom_pos <= height_)
2276                                 return 0;
2277                         offset = min(offset, bottom_pos - height_);
2278                         break;
2279                 }
2280                 if (bottom_pos > ymax)
2281                         break;
2282                 tm.newParMetricsDown();
2283         }
2284         d->anchor_ypos_ -= offset;
2285         return -offset;
2286 }
2287
2288
2289 int BufferView::scrollUp(int offset)
2290 {
2291         Text * text = &buffer_.text();
2292         TextMetrics & tm = d->text_metrics_[text];
2293         int ymin = - offset;
2294         while (true) {
2295                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
2296                 int top_pos = first.second->position() - first.second->ascent();
2297                 if (first.first == 0) {
2298                         if (top_pos >= 0)
2299                                 return 0;
2300                         offset = min(offset, - top_pos);
2301                         break;
2302                 }
2303                 if (top_pos < ymin)
2304                         break;
2305                 tm.newParMetricsUp();
2306         }
2307         d->anchor_ypos_ += offset;
2308         return offset;
2309 }
2310
2311
2312 void BufferView::setCursorFromRow(int row)
2313 {
2314         int tmpid;
2315         int tmppos;
2316         pit_type newpit = 0;
2317         pos_type newpos = 0;
2318
2319         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
2320
2321         bool posvalid = (tmpid != -1);
2322         if (posvalid) {
2323                 // we need to make sure that the row and position
2324                 // we got back are valid, because the buffer may well
2325                 // have changed since we last generated the LaTeX.
2326                 DocIterator dit = buffer_.getParFromID(tmpid);
2327                 if (dit == doc_iterator_end(&buffer_))
2328                         posvalid = false;
2329                 else if (dit.depth() > 1) {
2330                         // We are in an inset.
2331                         pos_type lastpos = dit.lastpos();
2332                         dit.pos() = tmppos > lastpos ? lastpos : tmppos;
2333                         setCursor(dit);
2334                         recenter();
2335                         return;
2336                 } else {
2337                         newpit = dit.pit();
2338                         // now have to check pos.
2339                         newpos = tmppos;
2340                         Paragraph const & par = buffer_.text().getPar(newpit);
2341                         if (newpos > par.size()) {
2342                                 LYXERR0("Requested position no longer valid.");
2343                                 newpos = par.size() - 1;
2344                         }
2345                 }
2346         }
2347         if (!posvalid) {
2348                 frontend::Alert::error(_("Inverse Search Failed"),
2349                         _("Invalid position requested by inverse search.\n"
2350                     "You need to update the viewed document."));
2351                 return;
2352         }
2353         d->cursor_.reset();
2354         buffer_.text().setCursor(d->cursor_, newpit, newpos);
2355         d->cursor_.setSelection(false);
2356         d->cursor_.resetAnchor();
2357         recenter();
2358 }
2359
2360
2361 bool BufferView::setCursorFromInset(Inset const * inset)
2362 {
2363         // are we already there?
2364         if (cursor().nextInset() == inset)
2365                 return true;
2366
2367         // Inset is not at cursor position. Find it in the document.
2368         Cursor cur(*this);
2369         cur.reset();
2370         while (cur && cur.nextInset() != inset)
2371                 cur.forwardInset();
2372
2373         if (cur) {
2374                 setCursor(cur);
2375                 return true;
2376         }
2377         return false;
2378 }
2379
2380
2381 void BufferView::gotoLabel(docstring const & label)
2382 {
2383         ListOfBuffers bufs = buffer().allRelatives();
2384         ListOfBuffers::iterator it = bufs.begin();
2385         for (; it != bufs.end(); ++it) {
2386                 Buffer const * buf = *it;
2387
2388                 // find label
2389                 Toc & toc = buf->tocBackend().toc("label");
2390                 TocIterator toc_it = toc.begin();
2391                 TocIterator end = toc.end();
2392                 for (; toc_it != end; ++toc_it) {
2393                         if (label == toc_it->str()) {
2394                                 lyx::dispatch(toc_it->action());
2395                                 return;
2396                         }
2397                 }
2398         }
2399 }
2400
2401
2402 TextMetrics const & BufferView::textMetrics(Text const * t) const
2403 {
2404         return const_cast<BufferView *>(this)->textMetrics(t);
2405 }
2406
2407
2408 TextMetrics & BufferView::textMetrics(Text const * t)
2409 {
2410         LBUFERR(t);
2411         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
2412         if (tmc_it == d->text_metrics_.end()) {
2413                 tmc_it = d->text_metrics_.insert(
2414                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
2415         }
2416         return tmc_it->second;
2417 }
2418
2419
2420 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
2421                 pit_type pit) const
2422 {
2423         return textMetrics(t).parMetrics(pit);
2424 }
2425
2426
2427 int BufferView::workHeight() const
2428 {
2429         return height_;
2430 }
2431
2432
2433 void BufferView::setCursor(DocIterator const & dit)
2434 {
2435         d->cursor_.reset();
2436         size_t const n = dit.depth();
2437         for (size_t i = 0; i < n; ++i)
2438                 dit[i].inset().edit(d->cursor_, true);
2439
2440         d->cursor_.setCursor(dit);
2441         d->cursor_.setSelection(false);
2442         // FIXME
2443         // It seems on general grounds as if this is probably needed, but
2444         // it is not yet clear.
2445         // See bug #7394 and r38388.
2446         // d->cursor.resetAnchor();
2447 }
2448
2449
2450 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
2451 {
2452         // Would be wrong to delete anything if we have a selection.
2453         if (cur.selection())
2454                 return false;
2455
2456         bool need_anchor_change = false;
2457         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
2458                 need_anchor_change);
2459
2460         if (need_anchor_change)
2461                 cur.resetAnchor();
2462
2463         if (!changed)
2464                 return false;
2465
2466         d->cursor_ = cur;
2467
2468         // we would rather not do this here, but it needs to be done before
2469         // the changed() signal is sent.
2470         buffer_.updateBuffer();
2471
2472         buffer_.changed(true);
2473         return true;
2474 }
2475
2476
2477 bool BufferView::mouseSetCursor(Cursor & cur, bool select)
2478 {
2479         LASSERT(&cur.bv() == this, return false);
2480
2481         if (!select)
2482                 // this event will clear selection so we save selection for
2483                 // persistent selection
2484                 cap::saveSelection(cursor());
2485
2486         d->cursor_.macroModeClose();
2487         // If a macro has been finalized, the cursor might have been broken
2488         cur.fixIfBroken();
2489
2490         // Has the cursor just left the inset?
2491         bool const leftinset = (&d->cursor_.inset() != &cur.inset());
2492         if (leftinset)
2493                 d->cursor_.fixIfBroken();
2494
2495         // FIXME: shift-mouse selection doesn't work well across insets.
2496         bool const do_selection =
2497                         select && &d->cursor_.normalAnchor().inset() == &cur.inset();
2498
2499         // do the dEPM magic if needed
2500         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
2501         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
2502         // the leftinset bool would not be necessary (badcursor instead).
2503         bool update = leftinset;
2504         if (!do_selection && d->cursor_.inTexted())
2505                 update |= checkDepm(cur, d->cursor_);
2506
2507         if (!do_selection)
2508                 d->cursor_.resetAnchor();
2509         d->cursor_.setCursor(cur);
2510         d->cursor_.boundary(cur.boundary());
2511         if (do_selection)
2512                 d->cursor_.setSelection();
2513         else
2514                 d->cursor_.clearSelection();
2515
2516         d->cursor_.finishUndo();
2517         d->cursor_.setCurrentFont();
2518         if (update)
2519                 cur.forceBufferUpdate();
2520         return update;
2521 }
2522
2523
2524 void BufferView::putSelectionAt(DocIterator const & cur,
2525                                 int length, bool backwards)
2526 {
2527         d->cursor_.clearSelection();
2528
2529         setCursor(cur);
2530
2531         if (length) {
2532                 if (backwards) {
2533                         d->cursor_.pos() += length;
2534                         d->cursor_.setSelection(d->cursor_, -length);
2535                 } else
2536                         d->cursor_.setSelection(d->cursor_, length);
2537         }
2538 }
2539
2540
2541 bool BufferView::selectIfEmpty(DocIterator & cur)
2542 {
2543         if ((cur.inTexted() && !cur.paragraph().empty())
2544             || (cur.inMathed() && !cur.cell().empty()))
2545                 return false;
2546
2547         pit_type const beg_pit = cur.pit();
2548         if (beg_pit > 0) {
2549                 // The paragraph associated to this item isn't
2550                 // the first one, so it can be selected
2551                 cur.backwardPos();
2552         } else {
2553                 // We have to resort to select the space between the
2554                 // end of this item and the begin of the next one
2555                 cur.forwardPos();
2556         }
2557         if (cur.empty()) {
2558                 // If it is the only item in the document,
2559                 // nothing can be selected
2560                 return false;
2561         }
2562         pit_type const end_pit = cur.pit();
2563         pos_type const end_pos = cur.pos();
2564         d->cursor_.clearSelection();
2565         d->cursor_.reset();
2566         d->cursor_.setCursor(cur);
2567         d->cursor_.pit() = beg_pit;
2568         d->cursor_.pos() = 0;
2569         d->cursor_.setSelection(false);
2570         d->cursor_.resetAnchor();
2571         d->cursor_.pit() = end_pit;
2572         d->cursor_.pos() = end_pos;
2573         d->cursor_.setSelection();
2574         return true;
2575 }
2576
2577
2578 Cursor & BufferView::cursor()
2579 {
2580         return d->cursor_;
2581 }
2582
2583
2584 Cursor const & BufferView::cursor() const
2585 {
2586         return d->cursor_;
2587 }
2588
2589
2590 pit_type BufferView::anchor_ref() const
2591 {
2592         return d->anchor_pit_;
2593 }
2594
2595
2596 bool BufferView::singleParUpdate()
2597 {
2598         Text & buftext = buffer_.text();
2599         pit_type const bottom_pit = d->cursor_.bottom().pit();
2600         TextMetrics & tm = textMetrics(&buftext);
2601         int old_height = tm.parMetrics(bottom_pit).height();
2602
2603         // make sure inline completion pointer is ok
2604         if (d->inlineCompletionPos_.fixIfBroken())
2605                 d->inlineCompletionPos_ = DocIterator();
2606
2607         // In Single Paragraph mode, rebreak only
2608         // the (main text, not inset!) paragraph containing the cursor.
2609         // (if this paragraph contains insets etc., rebreaking will
2610         // recursively descend)
2611         tm.redoParagraph(bottom_pit);
2612         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
2613         if (pm.height() != old_height)
2614                 // Paragraph height has changed so we cannot proceed to
2615                 // the singlePar optimisation.
2616                 return false;
2617
2618         d->update_strategy_ = SingleParUpdate;
2619
2620         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
2621                 << " y2: " << pm.position() + pm.descent()
2622                 << " pit: " << bottom_pit
2623                 << " singlepar: 1");
2624         return true;
2625 }
2626
2627
2628 void BufferView::updateMetrics()
2629 {
2630         if (height_ == 0 || width_ == 0)
2631                 return;
2632
2633         Text & buftext = buffer_.text();
2634         pit_type const npit = int(buftext.paragraphs().size());
2635
2636         // Clear out the position cache in case of full screen redraw,
2637         d->coord_cache_.clear();
2638
2639         // Clear out paragraph metrics to avoid having invalid metrics
2640         // in the cache from paragraphs not relayouted below
2641         // The complete text metrics will be redone.
2642         d->text_metrics_.clear();
2643
2644         TextMetrics & tm = textMetrics(&buftext);
2645
2646         // make sure inline completion pointer is ok
2647         if (d->inlineCompletionPos_.fixIfBroken())
2648                 d->inlineCompletionPos_ = DocIterator();
2649
2650         if (d->anchor_pit_ >= npit)
2651                 // The anchor pit must have been deleted...
2652                 d->anchor_pit_ = npit - 1;
2653
2654         // Rebreak anchor paragraph.
2655         tm.redoParagraph(d->anchor_pit_);
2656         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
2657
2658         // position anchor
2659         if (d->anchor_pit_ == 0) {
2660                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
2661
2662                 // Complete buffer visible? Then it's easy.
2663                 if (scrollRange == 0)
2664                         d->anchor_ypos_ = anchor_pm.ascent();
2665
2666                 // FIXME: Some clever handling needed to show
2667                 // the _first_ paragraph up to the top if the cursor is
2668                 // in the first line.
2669         }
2670         anchor_pm.setPosition(d->anchor_ypos_);
2671
2672         LYXERR(Debug::PAINTING, "metrics: "
2673                 << " anchor pit = " << d->anchor_pit_
2674                 << " anchor ypos = " << d->anchor_ypos_);
2675
2676         // Redo paragraphs above anchor if necessary.
2677         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
2678         // We are now just above the anchor paragraph.
2679         pit_type pit1 = d->anchor_pit_ - 1;
2680         for (; pit1 >= 0 && y1 >= 0; --pit1) {
2681                 tm.redoParagraph(pit1);
2682                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
2683                 y1 -= pm.descent();
2684                 // Save the paragraph position in the cache.
2685                 pm.setPosition(y1);
2686                 y1 -= pm.ascent();
2687         }
2688
2689         // Redo paragraphs below the anchor if necessary.
2690         int y2 = d->anchor_ypos_ + anchor_pm.descent();
2691         // We are now just below the anchor paragraph.
2692         pit_type pit2 = d->anchor_pit_ + 1;
2693         for (; pit2 < npit && y2 <= height_; ++pit2) {
2694                 tm.redoParagraph(pit2);
2695                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
2696                 y2 += pm.ascent();
2697                 // Save the paragraph position in the cache.
2698                 pm.setPosition(y2);
2699                 y2 += pm.descent();
2700         }
2701
2702         LYXERR(Debug::PAINTING, "Metrics: "
2703                 << " anchor pit = " << d->anchor_pit_
2704                 << " anchor ypos = " << d->anchor_ypos_
2705                 << " y1 = " << y1
2706                 << " y2 = " << y2
2707                 << " pit1 = " << pit1
2708                 << " pit2 = " << pit2);
2709
2710         d->update_strategy_ = FullScreenUpdate;
2711
2712         if (lyxerr.debugging(Debug::WORKAREA)) {
2713                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
2714                 d->coord_cache_.dump();
2715         }
2716 }
2717
2718
2719 void BufferView::insertLyXFile(FileName const & fname)
2720 {
2721         LASSERT(d->cursor_.inTexted(), return);
2722
2723         // Get absolute path of file and add ".lyx"
2724         // to the filename if necessary
2725         FileName filename = fileSearch(string(), fname.absFileName(), "lyx");
2726
2727         docstring const disp_fn = makeDisplayPath(filename.absFileName());
2728         // emit message signal.
2729         message(bformat(_("Inserting document %1$s..."), disp_fn));
2730
2731         docstring res;
2732         Buffer buf(filename.absFileName(), false);
2733         if (buf.loadLyXFile() == Buffer::ReadSuccess) {
2734                 ErrorList & el = buffer_.errorList("Parse");
2735                 // Copy the inserted document error list into the current buffer one.
2736                 el = buf.errorList("Parse");
2737                 buffer_.undo().recordUndo(d->cursor_);
2738                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
2739                                              buf.params().documentClassPtr(), el);
2740                 res = _("Document %1$s inserted.");
2741         } else {
2742                 res = _("Could not insert document %1$s");
2743         }
2744
2745         buffer_.changed(true);
2746         // emit message signal.
2747         message(bformat(res, disp_fn));
2748 }
2749
2750
2751 Point BufferView::coordOffset(DocIterator const & dit) const
2752 {
2753         int x = 0;
2754         int y = 0;
2755         int lastw = 0;
2756
2757         // Addup contribution of nested insets, from inside to outside,
2758         // keeping the outer paragraph for a special handling below
2759         for (size_t i = dit.depth() - 1; i >= 1; --i) {
2760                 CursorSlice const & sl = dit[i];
2761                 int xx = 0;
2762                 int yy = 0;
2763
2764                 // get relative position inside sl.inset()
2765                 sl.inset().cursorPos(*this, sl, dit.boundary() && (i + 1 == dit.depth()), xx, yy);
2766
2767                 // Make relative position inside of the edited inset relative to sl.inset()
2768                 x += xx;
2769                 y += yy;
2770
2771                 // In case of an RTL inset, the edited inset will be positioned to the left
2772                 // of xx:yy
2773                 if (sl.text()) {
2774                         bool boundary_i = dit.boundary() && i + 1 == dit.depth();
2775                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
2776                         if (rtl)
2777                                 x -= lastw;
2778                 }
2779
2780                 // remember width for the case that sl.inset() is positioned in an RTL inset
2781                 if (i && dit[i - 1].text()) {
2782                         // If this Inset is inside a Text Inset, retrieve the Dimension
2783                         // from the containing text instead of using Inset::dimension() which
2784                         // might not be implemented.
2785                         // FIXME (Abdel 23/09/2007): this is a bit messy because of the
2786                         // elimination of Inset::dim_ cache. This coordOffset() method needs
2787                         // to be rewritten in light of the new design.
2788                         Dimension const & dim = parMetrics(dit[i - 1].text(),
2789                                 dit[i - 1].pit()).insetDimension(&sl.inset());
2790                         lastw = dim.wid;
2791                 } else {
2792                         Dimension const dim = sl.inset().dimension(*this);
2793                         lastw = dim.wid;
2794                 }
2795
2796                 //lyxerr << "Cursor::getPos, i: "
2797                 // << i << " x: " << xx << " y: " << y << endl;
2798         }
2799
2800         // Add contribution of initial rows of outermost paragraph
2801         CursorSlice const & sl = dit[0];
2802         TextMetrics const & tm = textMetrics(sl.text());
2803         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
2804
2805         LBUFERR(!pm.rows().empty());
2806         y -= pm.rows()[0].ascent();
2807 #if 1
2808         // FIXME: document this mess
2809         size_t rend;
2810         if (sl.pos() > 0 && dit.depth() == 1) {
2811                 int pos = sl.pos();
2812                 if (pos && dit.boundary())
2813                         --pos;
2814 //              lyxerr << "coordOffset: boundary:" << dit.boundary() << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
2815                 rend = pm.pos2row(pos);
2816         } else
2817                 rend = pm.pos2row(sl.pos());
2818 #else
2819         size_t rend = pm.pos2row(sl.pos());
2820 #endif
2821         for (size_t rit = 0; rit != rend; ++rit)
2822                 y += pm.rows()[rit].height();
2823         y += pm.rows()[rend].ascent();
2824
2825         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2826
2827         // Make relative position from the nested inset now bufferview absolute.
2828         int xx = bottom_tm.cursorX(dit.bottom(), dit.boundary() && dit.depth() == 1);
2829         x += xx;
2830
2831         // In the RTL case place the nested inset at the left of the cursor in
2832         // the outer paragraph
2833         bool boundary_1 = dit.boundary() && 1 == dit.depth();
2834         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2835         if (rtl)
2836                 x -= lastw;
2837
2838         return Point(x, y);
2839 }
2840
2841
2842 Point BufferView::getPos(DocIterator const & dit) const
2843 {
2844         if (!paragraphVisible(dit))
2845                 return Point(-1, -1);
2846
2847         CursorSlice const & bot = dit.bottom();
2848         TextMetrics const & tm = textMetrics(bot.text());
2849
2850         // offset from outer paragraph
2851         Point p = coordOffset(dit);
2852         p.y_ += tm.parMetrics(bot.pit()).position();
2853         return p;
2854 }
2855
2856
2857 bool BufferView::paragraphVisible(DocIterator const & dit) const
2858 {
2859         CursorSlice const & bot = dit.bottom();
2860         TextMetrics const & tm = textMetrics(bot.text());
2861
2862         return tm.contains(bot.pit());
2863 }
2864
2865
2866 void BufferView::cursorPosAndHeight(Point & p, int & h) const
2867 {
2868         Cursor const & cur = cursor();
2869         Font const font = cur.getFont();
2870         frontend::FontMetrics const & fm = theFontMetrics(font);
2871         int const asc = fm.maxAscent();
2872         int const des = fm.maxDescent();
2873         h = asc + des;
2874         p = getPos(cur);
2875         p.y_ -= asc;
2876 }
2877
2878
2879 bool BufferView::cursorInView(Point const & p, int h) const
2880 {
2881         Cursor const & cur = cursor();
2882         // does the cursor touch the screen ?
2883         if (p.y_ + h < 0 || p.y_ >= workHeight() || !paragraphVisible(cur))
2884                 return false;
2885         return true;
2886 }
2887
2888
2889 void BufferView::draw(frontend::Painter & pain)
2890 {
2891         if (height_ == 0 || width_ == 0)
2892                 return;
2893         LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
2894
2895         Text & text = buffer_.text();
2896         TextMetrics const & tm = d->text_metrics_[&text];
2897         int const y = tm.first().second->position();
2898         PainterInfo pi(this, pain);
2899
2900         switch (d->update_strategy_) {
2901
2902         case NoScreenUpdate:
2903                 // If no screen painting is actually needed, only some the different
2904                 // coordinates of insets and paragraphs needs to be updated.
2905                 pi.full_repaint = true;
2906                 pi.pain.setDrawingEnabled(false);
2907                 tm.draw(pi, 0, y);
2908                 break;
2909
2910         case SingleParUpdate:
2911                 pi.full_repaint = false;
2912                 // In general, only the current row of the outermost paragraph
2913                 // will be redrawn. Particular cases where selection spans
2914                 // multiple paragraph are correctly detected in TextMetrics.
2915                 tm.draw(pi, 0, y);
2916                 break;
2917
2918         case DecorationUpdate:
2919                 // FIXME: We should also distinguish DecorationUpdate to avoid text
2920                 // drawing if possible. This is not possible to do easily right now
2921                 // because of the single backing pixmap.
2922
2923         case FullScreenUpdate:
2924                 // The whole screen, including insets, will be refreshed.
2925                 pi.full_repaint = true;
2926
2927                 // Clear background.
2928                 pain.fillRectangle(0, 0, width_, height_,
2929                         pi.backgroundColor(&buffer_.inset()));
2930
2931                 // Draw everything.
2932                 tm.draw(pi, 0, y);
2933
2934                 // and possibly grey out below
2935                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2936                 int const y2 = lastpm.second->position() + lastpm.second->descent();
2937
2938                 if (y2 < height_) {
2939                         Color color = buffer().isInternal()
2940                                 ? Color_background : Color_bottomarea;
2941                         pain.fillRectangle(0, y2, width_, height_ - y2, color);
2942                 }
2943                 break;
2944         }
2945         LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
2946
2947         // The scrollbar needs an update.
2948         updateScrollbar();
2949
2950         // Normalize anchor for next time
2951         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
2952         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2953         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
2954                 ParagraphMetrics const & pm = tm.parMetrics(pit);
2955                 if (pm.position() + pm.descent() > 0) {
2956                         d->anchor_pit_ = pit;
2957                         d->anchor_ypos_ = pm.position();
2958                         break;
2959                 }
2960         }
2961         LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
2962                 << "  anchor ypos = " << d->anchor_ypos_);
2963 }
2964
2965
2966 void BufferView::message(docstring const & msg)
2967 {
2968         if (d->gui_)
2969                 d->gui_->message(msg);
2970 }
2971
2972
2973 void BufferView::showDialog(string const & name)
2974 {
2975         if (d->gui_)
2976                 d->gui_->showDialog(name, string());
2977 }
2978
2979
2980 void BufferView::showDialog(string const & name,
2981         string const & data, Inset * inset)
2982 {
2983         if (d->gui_)
2984                 d->gui_->showDialog(name, data, inset);
2985 }
2986
2987
2988 void BufferView::updateDialog(string const & name, string const & data)
2989 {
2990         if (d->gui_)
2991                 d->gui_->updateDialog(name, data);
2992 }
2993
2994
2995 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
2996 {
2997         d->gui_ = gui;
2998 }
2999
3000
3001 // FIXME: Move this out of BufferView again
3002 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
3003 {
3004         if (!fname.isReadableFile()) {
3005                 docstring const error = from_ascii(strerror(errno));
3006                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
3007                 docstring const text =
3008                   bformat(_("Could not read the specified document\n"
3009                             "%1$s\ndue to the error: %2$s"), file, error);
3010                 Alert::error(_("Could not read file"), text);
3011                 return docstring();
3012         }
3013
3014         if (!fname.isReadableFile()) {
3015                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
3016                 docstring const text =
3017                   bformat(_("%1$s\n is not readable."), file);
3018                 Alert::error(_("Could not open file"), text);
3019                 return docstring();
3020         }
3021
3022         // FIXME UNICODE: We don't know the encoding of the file
3023         docstring file_content = fname.fileContents("UTF-8");
3024         if (file_content.empty()) {
3025                 Alert::error(_("Reading not UTF-8 encoded file"),
3026                              _("The file is not UTF-8 encoded.\n"
3027                                "It will be read as local 8Bit-encoded.\n"
3028                                "If this does not give the correct result\n"
3029                                "then please change the encoding of the file\n"
3030                                "to UTF-8 with a program other than LyX.\n"));
3031                 file_content = fname.fileContents("local8bit");
3032         }
3033
3034         return normalize_c(file_content);
3035 }
3036
3037
3038 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
3039 {
3040         docstring const tmpstr = contentsOfPlaintextFile(f);
3041
3042         if (tmpstr.empty())
3043                 return;
3044
3045         Cursor & cur = cursor();
3046         cap::replaceSelection(cur);
3047         buffer_.undo().recordUndo(cur);
3048         if (asParagraph)
3049                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr, cur.current_font);
3050         else
3051                 cur.innerText()->insertStringAsLines(cur, tmpstr, cur.current_font);
3052
3053         buffer_.changed(true);
3054 }
3055
3056
3057 docstring const & BufferView::inlineCompletion() const
3058 {
3059         return d->inlineCompletion_;
3060 }
3061
3062
3063 size_t const & BufferView::inlineCompletionUniqueChars() const
3064 {
3065         return d->inlineCompletionUniqueChars_;
3066 }
3067
3068
3069 DocIterator const & BufferView::inlineCompletionPos() const
3070 {
3071         return d->inlineCompletionPos_;
3072 }
3073
3074
3075 void BufferView::resetInlineCompletionPos()
3076 {
3077         d->inlineCompletionPos_ = DocIterator();
3078 }
3079
3080
3081 bool samePar(DocIterator const & a, DocIterator const & b)
3082 {
3083         if (a.empty() && b.empty())
3084                 return true;
3085         if (a.empty() || b.empty())
3086                 return false;
3087         if (a.depth() != b.depth())
3088                 return false;
3089         return &a.innerParagraph() == &b.innerParagraph();
3090 }
3091
3092
3093 void BufferView::setInlineCompletion(Cursor const & cur, DocIterator const & pos,
3094         docstring const & completion, size_t uniqueChars)
3095 {
3096         uniqueChars = min(completion.size(), uniqueChars);
3097         bool changed = d->inlineCompletion_ != completion
3098                 || d->inlineCompletionUniqueChars_ != uniqueChars;
3099         bool singlePar = true;
3100         d->inlineCompletion_ = completion;
3101         d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
3102
3103         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
3104
3105         // at new position?
3106         DocIterator const & old = d->inlineCompletionPos_;
3107         if (old != pos) {
3108                 //lyxerr << "inlineCompletionPos changed" << std::endl;
3109                 // old or pos are in another paragraph?
3110                 if ((!samePar(cur, pos) && !pos.empty())
3111                     || (!samePar(cur, old) && !old.empty())) {
3112                         singlePar = false;
3113                         //lyxerr << "different paragraph" << std::endl;
3114                 }
3115                 d->inlineCompletionPos_ = pos;
3116         }
3117
3118         // set update flags
3119         if (changed) {
3120                 if (singlePar && !(cur.result().screenUpdate() & Update::Force))
3121                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
3122                 else
3123                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::Force);
3124         }
3125 }
3126
3127
3128 bool BufferView::clickableInset() const
3129 {
3130         return d->clickable_inset_;
3131 }
3132
3133 } // namespace lyx