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 "Buffer.h"
  20 #include "buffer_funcs.h"
  21 #include "BufferList.h"
  22 #include "BufferParams.h"
  23 #include "CoordCache.h"
  24 #include "Cursor.h"
  25 #include "CutAndPaste.h"
  26 #include "DispatchResult.h"
  27 #include "EmbeddedFiles.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 "LyX.h"
  38 #include "lyxfind.h"
  39 #include "LyXFunc.h"
  40 #include "Layout.h"
  41 #include "LyXRC.h"
  42 #include "MetricsInfo.h"
  43 #include "Paragraph.h"
  44 #include "paragraph_funcs.h"
  45 #include "ParagraphParameters.h"
  46 #include "ParIterator.h"
  47 #include "Session.h"
  48 #include "Text.h"
  49 #include "TextClass.h"
  50 #include "TextMetrics.h"
  51 #include "TexRow.h"
  52 #include "TocBackend.h"
  53 #include "VSpace.h"
  54 #include "WordLangTuple.h"
  55
  56 #include "insets/InsetBibtex.h"
  57 #include "insets/InsetCommand.h" // ChangeRefs
  58 #include "insets/InsetRef.h"
  59 #include "insets/InsetText.h"
  60
  61 #include "frontends/alert.h"
  62 #include "frontends/Application.h"
  63 #include "frontends/Delegates.h"
  64 #include "frontends/FontMetrics.h"
  65 #include "frontends/Painter.h"
  66 #include "frontends/Selection.h"
  67
  68 #include "graphics/Previews.h"
  69
  70 #include "support/convert.h"
  71 #include "support/debug.h"
  72 #include "support/ExceptionMessage.h"
  73 #include "support/filetools.h"
  74 #include "support/gettext.h"
  75 #include "support/lstrings.h"
  76 #include "support/Package.h"
  77 #include "support/types.h"
  78
  79 #include <cerrno>
  80 #include <fstream>
  81 #include <functional>
  82 #include <iterator>
  83 #include <vector>
  84
  85 using namespace std;
  86 using namespace lyx::support;
  87
  88 namespace lyx {
  89
  90 namespace Alert = frontend::Alert;
  91
  92 namespace {
  93
  94 /// Return an inset of this class if it exists at the current cursor position
  95 template <class T>
  96 T * getInsetByCode(Cursor const & cur, InsetCode code)
  97 {
  98         DocIterator it = cur;
  99         Inset * inset = it.nextInset();
 100         if (inset && inset->lyxCode() == code)
 101                 return static_cast<T*>(inset);
 102         return 0;
 103 }
 104
 105
 106 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 107         bool same_content);
 108
 109 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 110         docstring const & contents)
 111 {
 112         DocIterator tmpdit = dit;
 113
 114         while (tmpdit) {
 115                 Inset const * inset = tmpdit.nextInset();
 116                 if (inset
 117                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()
 118                     && (contents.empty() ||
 119                     static_cast<InsetCommand const *>(inset)->getFirstNonOptParam() == contents)) {
 120                         dit = tmpdit;
 121                         return true;
 122                 }
 123                 tmpdit.forwardInset();
 124         }
 125
 126         return false;
 127 }
 128
 129
 130 /// Looks for next inset with one of the given codes.
 131 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 132         bool same_content)
 133 {
 134         docstring contents;
 135         DocIterator tmpdit = dit;
 136         tmpdit.forwardInset();
 137         if (!tmpdit)
 138                 return false;
 139
 140         if (same_content) {
 141                 Inset const * inset = tmpdit.nextInset();
 142                 if (inset
 143                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()) {
 144                         contents = static_cast<InsetCommand const *>(inset)->getFirstNonOptParam();
 145                 }
 146         }
 147
 148         if (!findNextInset(tmpdit, codes, contents)) {
 149                 if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
 150                         tmpdit  = doc_iterator_begin(tmpdit.bottom().inset());
 151                         if (!findNextInset(tmpdit, codes, contents))
 152                                 return false;
 153                 } else
 154                         return false;
 155         }
 156
 157         dit = tmpdit;
 158         return true;
 159 }
 160
 161
 162 /// Looks for next inset with the given code
 163 void findInset(DocIterator & dit, InsetCode code, bool same_content)
 164 {
 165         findInset(dit, vector<InsetCode>(1, code), same_content);
 166 }
 167
 168
 169 /// Moves cursor to the next inset with one of the given codes.
 170 void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
 171                bool same_content)
 172 {
 173         Cursor tmpcur = bv->cursor();
 174         if (!findInset(tmpcur, codes, same_content)) {
 175                 bv->cursor().message(_("No more insets"));
 176                 return;
 177         }
 178
 179         tmpcur.clearSelection();
 180         bv->setCursor(tmpcur);
 181         bv->showCursor();
 182 }
 183
 184
 185 /// Moves cursor to the next inset with given code.
 186 void gotoInset(BufferView * bv, InsetCode code, bool same_content)
 187 {
 188         gotoInset(bv, vector<InsetCode>(1, code), same_content);
 189 }
 190
 191
 192 /// A map from a Text to the associated text metrics
 193 typedef map<Text const *, TextMetrics> TextMetricsCache;
 194
 195 enum ScreenUpdateStrategy {
 196         NoScreenUpdate,
 197         SingleParUpdate,
 198         FullScreenUpdate,
 199         DecorationUpdate
 200 };
 201
 202 } // anon namespace
 203
 204
 205 /////////////////////////////////////////////////////////////////////
 206 //
 207 // BufferView
 208 //
 209 /////////////////////////////////////////////////////////////////////
 210
 211 struct BufferView::Private
 212 {
 213         Private(BufferView & bv): wh_(0), cursor_(bv),
 214                 anchor_pit_(0), anchor_ypos_(0),
 215                 last_inset_(0), gui_(0)
 216         {}
 217
 218         ///
 219         ScrollbarParameters scrollbarParameters_;
 220         ///
 221         ScreenUpdateStrategy update_strategy_;
 222         ///
 223         CoordCache coord_cache_;
 224
 225         /// Estimated average par height for scrollbar.
 226         int wh_;
 227         /// this is used to handle XSelection events in the right manner.
 228         struct {
 229                 CursorSlice cursor;
 230                 CursorSlice anchor;
 231                 bool set;
 232         } xsel_cache_;
 233         ///
 234         Cursor cursor_;
 235         ///
 236         pit_type anchor_pit_;
 237         ///
 238         int anchor_ypos_;
 239         ///
 240         vector<int> par_height_;
 241
 242         ///
 243         DocIterator inlineCompletionPos;
 244         ///
 245         docstring inlineCompletion;
 246         ///
 247         size_t inlineCompletionUniqueChars;
 248
 249         /// keyboard mapping object.
 250         Intl intl_;
 251
 252         /// last visited inset.
 253         /** kept to send setMouseHover(false).
 254           * Not owned, so don't delete.
 255           */
 256         Inset * last_inset_;
 257
 258         mutable TextMetricsCache text_metrics_;
 259
 260         /// Whom to notify.
 261         /** Not owned, so don't delete.
 262           */
 263         frontend::GuiBufferViewDelegate * gui_;
 264 };
 265
 266
 267 BufferView::BufferView(Buffer & buf)
 268         : width_(0), height_(0), full_screen_(false), buffer_(buf), d(new Private(*this))
 269 {
 270         d->xsel_cache_.set = false;
 271         d->intl_.initKeyMapper(lyxrc.use_kbmap);
 272
 273         d->cursor_.push(buffer_.inset());
 274         d->cursor_.resetAnchor();
 275         d->cursor_.setCurrentFont();
 276
 277         if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 278                 graphics::Previews::get().generateBufferPreviews(buffer_);
 279 }
 280
 281
 282 BufferView::~BufferView()
 283 {
 284         // current buffer is going to be switched-off, save cursor pos
 285         // Ideally, the whole cursor stack should be saved, but session
 286         // currently can only handle bottom (whole document) level pit and pos.
 287         // That is to say, if a cursor is in a nested inset, it will be
 288         // restore to the left of the top level inset.
 289         LastFilePosSection::FilePos fp;
 290         fp.pit = d->cursor_.bottom().pit();
 291         fp.pos = d->cursor_.bottom().pos();
 292         LyX::ref().session().lastFilePos().save(buffer_.fileName(), fp);
 293
 294         delete d;
 295 }
 296
 297
 298 int BufferView::rightMargin() const
 299 {
 300         // The additional test for the case the outliner is opened.
 301         if (!full_screen_ ||
 302                 !lyxrc.full_screen_limit ||
 303                 width_ < lyxrc.full_screen_width + 20)
 304                         return 10;
 305
 306         return (width_ - lyxrc.full_screen_width) / 2;
 307 }
 308
 309
 310 int BufferView::leftMargin() const
 311 {
 312         return rightMargin();
 313 }
 314
 315
 316 bool BufferView::isTopScreen() const
 317 {
 318         return d->scrollbarParameters_.position == d->scrollbarParameters_.min;
 319 }
 320
 321
 322 bool BufferView::isBottomScreen() const
 323 {
 324         return d->scrollbarParameters_.position == d->scrollbarParameters_.max;
 325 }
 326
 327
 328 Intl & BufferView::getIntl()
 329 {
 330         return d->intl_;
 331 }
 332
 333
 334 Intl const & BufferView::getIntl() const
 335 {
 336         return d->intl_;
 337 }
 338
 339
 340 CoordCache & BufferView::coordCache()
 341 {
 342         return d->coord_cache_;
 343 }
 344
 345
 346 CoordCache const & BufferView::coordCache() const
 347 {
 348         return d->coord_cache_;
 349 }
 350
 351
 352 Buffer & BufferView::buffer()
 353 {
 354         return buffer_;
 355 }
 356
 357
 358 Buffer const & BufferView::buffer() const
 359 {
 360         return buffer_;
 361 }
 362
 363
 364 bool BufferView::fitCursor()
 365 {
 366         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
 367                 frontend::FontMetrics const & fm =
 368                         theFontMetrics(d->cursor_.getFont().fontInfo());
 369                 int const asc = fm.maxAscent();
 370                 int const des = fm.maxDescent();
 371                 Point const p = getPos(d->cursor_, d->cursor_.boundary());
 372                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 373                         return false;
 374         }
 375         return true;
 376 }
 377
 378
 379 void BufferView::processUpdateFlags(Update::flags flags)
 380 {
 381         // last_inset_ points to the last visited inset. This pointer may become
 382         // invalid because of keyboard editing. Since all such operations
 383         // causes screen update(), I reset last_inset_ to avoid such a problem.
 384         d->last_inset_ = 0;
 385         // This is close to a hot-path.
 386         LYXERR(Debug::DEBUG, "BufferView::processUpdateFlags()"
 387                 << "[fitcursor = " << (flags & Update::FitCursor)
 388                 << ", forceupdate = " << (flags & Update::Force)
 389                 << ", singlepar = " << (flags & Update::SinglePar)
 390                 << "]  buffer: " << &buffer_);
 391
 392         buffer_.updateMacros();
 393
 394         // Now do the first drawing step if needed. This consists on updating
 395         // the CoordCache in updateMetrics().
 396         // The second drawing step is done in WorkArea::redraw() if needed.
 397
 398         // Case when no explicit update is requested.
 399         if (!flags) {
 400                 // no need to redraw anything.
 401                 d->update_strategy_ = NoScreenUpdate;
 402                 return;
 403         }
 404
 405         if (flags == Update::Decoration) {
 406                 d->update_strategy_ = DecorationUpdate;
 407                 buffer_.changed();
 408                 return;
 409         }
 410
 411         if (flags == Update::FitCursor
 412                 || flags == (Update::Decoration | Update::FitCursor)) {
 413                 // tell the frontend to update the screen if needed.
 414                 if (fitCursor()) {
 415                         showCursor();
 416                         return;
 417                 }
 418                 if (flags & Update::Decoration) {
 419                         d->update_strategy_ = DecorationUpdate;
 420                         buffer_.changed();
 421                         return;
 422                 }
 423                 // no screen update is needed.
 424                 d->update_strategy_ = NoScreenUpdate;
 425                 return;
 426         }
 427
 428         bool const full_metrics = flags & Update::Force || !singleParUpdate();
 429
 430         if (full_metrics)
 431                 // We have to update the full screen metrics.
 432                 updateMetrics();
 433
 434         if (!(flags & Update::FitCursor)) {
 435                 // Nothing to do anymore. Trigger a redraw and return
 436                 buffer_.changed();
 437                 return;
 438         }
 439
 440         // updateMetrics() does not update paragraph position
 441         // This is done at draw() time. So we need a redraw!
 442         buffer_.changed();
 443
 444         if (fitCursor()) {
 445                 // The cursor is off screen so ensure it is visible.
 446                 // refresh it:
 447                 showCursor();
 448         }
 449 }
 450
 451
 452 void BufferView::updateScrollbar()
 453 {
 454         if (height_ == 0)
 455                 return;
 456
 457         // We prefer fixed size line scrolling.
 458         d->scrollbarParameters_.single_step = defaultRowHeight();
 459         // We prefer full screen page scrolling.
 460         d->scrollbarParameters_.page_step = height_;
 461
 462         Text & t = buffer_.text();
 463         TextMetrics & tm = d->text_metrics_[&t];
 464
 465         LYXERR(Debug::GUI, " Updating scrollbar: height: "
 466                 << t.paragraphs().size()
 467                 << " curr par: " << d->cursor_.bottom().pit()
 468                 << " default height " << defaultRowHeight());
 469
 470         size_t const parsize = t.paragraphs().size();
 471         if (d->par_height_.size() != parsize) {
 472                 d->par_height_.clear();
 473                 // FIXME: We assume a default paragraph height of 2 rows. This
 474                 // should probably be pondered with the screen width.
 475                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
 476         }
 477
 478         // Look at paragraph heights on-screen
 479         pair<pit_type, ParagraphMetrics const *> first = tm.first();
 480         pair<pit_type, ParagraphMetrics const *> last = tm.last();
 481         for (pit_type pit = first.first; pit <= last.first; ++pit) {
 482                 d->par_height_[pit] = tm.parMetrics(pit).height();
 483                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
 484                         << d->par_height_[pit]);
 485         }
 486
 487         int top_pos = first.second->position() - first.second->ascent();
 488         int bottom_pos = last.second->position() + last.second->descent();
 489         bool first_visible = first.first == 0 && top_pos >= 0;
 490         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
 491         if (first_visible && last_visible) {
 492                 d->scrollbarParameters_.min = 0;
 493                 d->scrollbarParameters_.max = 0;
 494                 return;
 495         }
 496
 497         d->scrollbarParameters_.min = top_pos;
 498         for (size_t i = 0; i != size_t(first.first); ++i)
 499                 d->scrollbarParameters_.min -= d->par_height_[i];
 500         d->scrollbarParameters_.max = bottom_pos;
 501         for (size_t i = last.first + 1; i != parsize; ++i)
 502                 d->scrollbarParameters_.max += d->par_height_[i];
 503
 504         d->scrollbarParameters_.position = 0;
 505         // The reference is the top position so we remove one page.
 506         d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 507 }
 508
 509
 510 ScrollbarParameters const & BufferView::scrollbarParameters() const
 511 {
 512         return d->scrollbarParameters_;
 513 }
 514
 515
 516 docstring BufferView::toolTip(int x, int y) const
 517 {
 518         // Get inset under mouse, if there is one.
 519         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 520         if (!covering_inset)
 521                 // No inset, no tooltip...
 522                 return docstring();
 523         return covering_inset->toolTip(*this, x, y);
 524 }
 525
 526
 527 docstring BufferView::contextMenu(int x, int y) const
 528 {
 529         // Get inset under mouse, if there is one.
 530         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 531         if (covering_inset)
 532                 return covering_inset->contextMenu(*this, x, y);
 533
 534         return buffer_.inset().contextMenu(*this, x, y);
 535 }
 536
 537
 538 void BufferView::scrollDocView(int value)
 539 {
 540         int const offset = value - d->scrollbarParameters_.position;
 541         // If the offset is less than 2 screen height, prefer to scroll instead.
 542         if (abs(offset) <= 2 * height_) {
 543                 scroll(offset);
 544                 return;
 545         }
 546
 547         // cut off at the top
 548         if (value <= d->scrollbarParameters_.min) {
 549                 DocIterator dit = doc_iterator_begin(buffer_.inset());
 550                 showCursor(dit);
 551                 LYXERR(Debug::SCROLLING, "scroll to top");
 552                 return;
 553         }
 554
 555         // cut off at the bottom
 556         if (value >= d->scrollbarParameters_.max) {
 557                 DocIterator dit = doc_iterator_end(buffer_.inset());
 558                 dit.backwardPos();
 559                 showCursor(dit);
 560                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 561                 return;
 562         }
 563
 564         // find paragraph at target position
 565         int par_pos = d->scrollbarParameters_.min;
 566         pit_type i = 0;
 567         for (; i != int(d->par_height_.size()); ++i) {
 568                 par_pos += d->par_height_[i];
 569                 if (par_pos >= value)
 570                         break;
 571         }
 572
 573         if (par_pos < value) {
 574                 // It seems we didn't find the correct pit so stay on the safe side and
 575                 // scroll to bottom.
 576                 LYXERR0("scrolling position not found!");
 577                 scrollDocView(d->scrollbarParameters_.max);
 578                 return;
 579         }
 580
 581         DocIterator dit = doc_iterator_begin(buffer_.inset());
 582         dit.pit() = i;
 583         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 584         showCursor(dit);
 585 }
 586
 587
 588 // FIXME: this method is not working well.
 589 void BufferView::setCursorFromScrollbar()
 590 {
 591         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 592
 593         int const height = 2 * defaultRowHeight();
 594         int const first = height;
 595         int const last = height_ - height;
 596         Cursor & cur = d->cursor_;
 597
 598         switch (cursorStatus(cur)) {
 599         case CUR_ABOVE:
 600                 // We reset the cursor because cursorStatus() does not
 601                 // work when the cursor is within mathed.
 602                 cur.reset(buffer_.inset());
 603                 tm.setCursorFromCoordinates(cur, 0, first);
 604                 cur.clearSelection();
 605                 break;
 606         case CUR_BELOW:
 607                 // We reset the cursor because cursorStatus() does not
 608                 // work when the cursor is within mathed.
 609                 cur.reset(buffer_.inset());
 610                 tm.setCursorFromCoordinates(cur, 0, last);
 611                 cur.clearSelection();
 612                 break;
 613         case CUR_INSIDE:
 614                 int const y = getPos(cur, cur.boundary()).y_;
 615                 int const newy = min(last, max(y, first));
 616                 if (y != newy) {
 617                         cur.reset(buffer_.inset());
 618                         tm.setCursorFromCoordinates(cur, 0, newy);
 619                 }
 620         }
 621 }
 622
 623
 624 Change const BufferView::getCurrentChange() const
 625 {
 626         if (!d->cursor_.selection())
 627                 return Change(Change::UNCHANGED);
 628
 629         DocIterator dit = d->cursor_.selectionBegin();
 630         return dit.paragraph().lookupChange(dit.pos());
 631 }
 632
 633
 634 // this could be used elsewhere as well?
 635 // FIXME: This does not work within mathed!
 636 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 637 {
 638         Point const p = getPos(dit, dit.boundary());
 639         if (p.y_ < 0)
 640                 return CUR_ABOVE;
 641         if (p.y_ > workHeight())
 642                 return CUR_BELOW;
 643         return CUR_INSIDE;
 644 }
 645
 646
 647 void BufferView::saveBookmark(unsigned int idx)
 648 {
 649         // tenatively save bookmark, id and pos will be used to
 650         // acturately locate a bookmark in a 'live' lyx session.
 651         // pit and pos will be updated with bottom level pit/pos
 652         // when lyx exits.
 653         LyX::ref().session().bookmarks().save(
 654                 buffer_.fileName(),
 655                 d->cursor_.bottom().pit(),
 656                 d->cursor_.bottom().pos(),
 657                 d->cursor_.paragraph().id(),
 658                 d->cursor_.pos(),
 659                 idx
 660         );
 661         if (idx)
 662                 // emit message signal.
 663                 message(_("Save bookmark"));
 664 }
 665
 666
 667 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 668         int top_id, pos_type top_pos)
 669 {
 670         bool success = false;
 671         DocIterator dit;
 672
 673         d->cursor_.clearSelection();
 674
 675         // if a valid par_id is given, try it first
 676         // This is the case for a 'live' bookmark when unique paragraph ID
 677         // is used to track bookmarks.
 678         if (top_id > 0) {
 679                 dit = buffer_.getParFromID(top_id);
 680                 if (!dit.atEnd()) {
 681                         dit.pos() = min(dit.paragraph().size(), top_pos);
 682                         // Some slices of the iterator may not be
 683                         // reachable (e.g. closed collapsable inset)
 684                         // so the dociterator may need to be
 685                         // shortened. Otherwise, setCursor may crash
 686                         // lyx when the cursor can not be set to these
 687                         // insets.
 688                         size_t const n = dit.depth();
 689                         for (size_t i = 0; i < n; ++i)
 690                                 if (dit[i].inset().editable() != Inset::HIGHLY_EDITABLE) {
 691                                         dit.resize(i);
 692                                         break;
 693                                 }
 694                         success = true;
 695                 }
 696         }
 697
 698         // if top_id == 0, or searching through top_id failed
 699         // This is the case for a 'restored' bookmark when only bottom
 700         // (document level) pit was saved. Because of this, bookmark
 701         // restoration is inaccurate. If a bookmark was within an inset,
 702         // it will be restored to the left of the outmost inset that contains
 703         // the bookmark.
 704         if (bottom_pit < int(buffer_.paragraphs().size())) {
 705                 dit = doc_iterator_begin(buffer_.inset());
 706
 707                 dit.pit() = bottom_pit;
 708                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 709                 success = true;
 710         }
 711
 712         if (success) {
 713                 // Note: only bottom (document) level pit is set.
 714                 setCursor(dit);
 715                 // set the current font.
 716                 d->cursor_.setCurrentFont();
 717                 // To center the screen on this new position we need the
 718                 // paragraph position which is computed at draw() time.
 719                 // So we need a redraw!
 720                 buffer_.changed();
 721                 if (fitCursor())
 722                         showCursor();
 723         }
 724
 725         return success;
 726 }
 727
 728
 729 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 730 {
 731         if (lyxrc.rtl_support) {
 732                 if (d->cursor_.real_current_font.isRightToLeft()) {
 733                         if (d->intl_.keymap == Intl::PRIMARY)
 734                                 d->intl_.keyMapSec();
 735                 } else {
 736                         if (d->intl_.keymap == Intl::SECONDARY)
 737                                 d->intl_.keyMapPrim();
 738                 }
 739         }
 740
 741         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 742 }
 743
 744
 745 int BufferView::workWidth() const
 746 {
 747         return width_;
 748 }
 749
 750
 751 void BufferView::showCursor()
 752 {
 753         showCursor(d->cursor_);
 754 }
 755
 756
 757 void BufferView::showCursor(DocIterator const & dit)
 758 {
 759         // We are not properly started yet, delay until resizing is
 760         // done.
 761         if (height_ == 0)
 762                 return;
 763
 764         LYXERR(Debug::SCROLLING, "recentering!");
 765
 766         CursorSlice const & bot = dit.bottom();
 767         TextMetrics & tm = d->text_metrics_[bot.text()];
 768
 769         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 770         int bot_pit = bot.pit();
 771         if (bot_pit > max_pit) {
 772                 // FIXME: Why does this happen?
 773                 LYXERR0("bottom pit is greater that max pit: "
 774                         << bot_pit << " > " << max_pit);
 775                 bot_pit = max_pit;
 776         }
 777
 778         if (bot_pit == tm.first().first - 1)
 779                 tm.newParMetricsUp();
 780         else if (bot_pit == tm.last().first + 1)
 781                 tm.newParMetricsDown();
 782
 783         if (tm.contains(bot_pit)) {
 784                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 785                 BOOST_ASSERT(!pm.rows().empty());
 786                 // FIXME: smooth scrolling doesn't work in mathed.
 787                 CursorSlice const & cs = dit.innerTextSlice();
 788                 int offset = coordOffset(dit, dit.boundary()).y_;
 789                 int ypos = pm.position() + offset;
 790                 Dimension const & row_dim =
 791                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 792                 if (ypos - row_dim.ascent() < 0)
 793                         scrollUp(- ypos + row_dim.ascent());
 794                 else if (ypos + row_dim.descent() > height_)
 795                         scrollDown(ypos - height_ + row_dim.descent());
 796                 // else, nothing to do, the cursor is already visible so we just return.
 797                 return;
 798         }
 799
 800         // fix inline completion position
 801         if (d->inlineCompletionPos.fixIfBroken())
 802                 d->inlineCompletionPos = DocIterator();
 803
 804         tm.redoParagraph(bot_pit);
 805         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 806         int offset = coordOffset(dit, dit.boundary()).y_;
 807
 808         d->anchor_pit_ = bot_pit;
 809         CursorSlice const & cs = dit.innerTextSlice();
 810         Dimension const & row_dim =
 811                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 812
 813         if (d->anchor_pit_ == 0)
 814                 d->anchor_ypos_ = offset + pm.ascent();
 815         else if (d->anchor_pit_ == max_pit)
 816                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
 817         else
 818                 d->anchor_ypos_ = defaultRowHeight() * 2 - offset - row_dim.descent();
 819
 820         updateMetrics();
 821         buffer_.changed();
 822 }
 823
 824
 825 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 826 {
 827         FuncStatus flag;
 828
 829         Cursor & cur = d->cursor_;
 830
 831         switch (cmd.action) {
 832
 833         case LFUN_UNDO:
 834                 flag.enabled(buffer_.undo().hasUndoStack());
 835                 break;
 836         case LFUN_REDO:
 837                 flag.enabled(buffer_.undo().hasRedoStack());
 838                 break;
 839         case LFUN_FILE_INSERT:
 840         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 841         case LFUN_FILE_INSERT_PLAINTEXT:
 842         case LFUN_BOOKMARK_SAVE:
 843                 // FIXME: Actually, these LFUNS should be moved to Text
 844                 flag.enabled(cur.inTexted());
 845                 break;
 846         case LFUN_FONT_STATE:
 847         case LFUN_LABEL_INSERT:
 848         case LFUN_INFO_INSERT:
 849         case LFUN_PARAGRAPH_GOTO:
 850         case LFUN_NOTE_NEXT:
 851         case LFUN_REFERENCE_NEXT:
 852         case LFUN_WORD_FIND:
 853         case LFUN_WORD_REPLACE:
 854         case LFUN_MARK_OFF:
 855         case LFUN_MARK_ON:
 856         case LFUN_MARK_TOGGLE:
 857         case LFUN_SCREEN_RECENTER:
 858         case LFUN_BIBTEX_DATABASE_ADD:
 859         case LFUN_BIBTEX_DATABASE_DEL:
 860         case LFUN_STATISTICS:
 861         case LFUN_NEXT_INSET_TOGGLE:
 862                 flag.enabled(true);
 863                 break;
 864
 865         case LFUN_LABEL_GOTO: {
 866                 flag.enabled(!cmd.argument().empty()
 867                     || getInsetByCode<InsetRef>(cur, REF_CODE));
 868                 break;
 869         }
 870
 871         case LFUN_CHANGES_TRACK:
 872                 flag.enabled(true);
 873                 flag.setOnOff(buffer_.params().trackChanges);
 874                 break;
 875
 876         case LFUN_CHANGES_OUTPUT:
 877                 flag.enabled(true);
 878                 flag.setOnOff(buffer_.params().outputChanges);
 879                 break;
 880
 881         case LFUN_CHANGES_MERGE:
 882         case LFUN_CHANGE_NEXT:
 883         case LFUN_ALL_CHANGES_ACCEPT:
 884         case LFUN_ALL_CHANGES_REJECT:
 885                 // TODO: context-sensitive enabling of LFUNs
 886                 // In principle, these command should only be enabled if there
 887                 // is a change in the document. However, without proper
 888                 // optimizations, this will inevitably result in poor performance.
 889                 flag.enabled(true);
 890                 break;
 891
 892         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 893                 flag.setOnOff(buffer_.params().compressed);
 894                 break;
 895         }
 896
 897         case LFUN_BUFFER_TOGGLE_EMBEDDING: {
 898                 flag.setOnOff(buffer_.params().embedded);
 899                 break;
 900         }
 901
 902         case LFUN_SCREEN_UP:
 903         case LFUN_SCREEN_DOWN:
 904         case LFUN_SCROLL:
 905         case LFUN_SCREEN_UP_SELECT:
 906         case LFUN_SCREEN_DOWN_SELECT:
 907                 flag.enabled(true);
 908                 break;
 909
 910         case LFUN_LAYOUT_TABULAR:
 911                 flag.enabled(cur.innerInsetOfType(TABULAR_CODE));
 912                 break;
 913
 914         case LFUN_LAYOUT:
 915                 flag.enabled(!cur.inset().forceEmptyLayout(cur.idx()));
 916                 break;
 917
 918         case LFUN_LAYOUT_PARAGRAPH:
 919                 flag.enabled(cur.inset().allowParagraphCustomization(cur.idx()));
 920                 break;
 921
 922         case LFUN_INSET_SETTINGS: {
 923                 InsetCode code = cur.inset().lyxCode();
 924                 bool enable = false;
 925                 switch (code) {
 926                         case TABULAR_CODE:
 927                                 enable = cmd.argument() == "tabular";
 928                                 break;
 929                         case ERT_CODE:
 930                                 enable = cmd.argument() == "ert";
 931                                 break;
 932                         case FLOAT_CODE:
 933                                 enable = cmd.argument() == "float";
 934                                 break;
 935                         case WRAP_CODE:
 936                                 enable = cmd.argument() == "wrap";
 937                                 break;
 938                         case NOTE_CODE:
 939                                 enable = cmd.argument() == "note";
 940                                 break;
 941                         case BRANCH_CODE:
 942                                 enable = cmd.argument() == "branch";
 943                                 break;
 944                         case BOX_CODE:
 945                                 enable = cmd.argument() == "box";
 946                                 break;
 947                         case LISTINGS_CODE:
 948                                 enable = cmd.argument() == "listings";
 949                                 break;
 950                         default:
 951                                 break;
 952                 }
 953                 flag.enabled(enable);
 954                 break;
 955         }
 956
 957         case LFUN_DIALOG_SHOW_NEW_INSET:
 958                 flag.enabled(cur.inset().lyxCode() != ERT_CODE &&
 959                         cur.inset().lyxCode() != LISTINGS_CODE);
 960                 if (cur.inset().lyxCode() == CAPTION_CODE) {
 961                         FuncStatus flag;
 962                         if (cur.inset().getStatus(cur, cmd, flag))
 963                                 return flag;
 964                 }
 965                 break;
 966
 967         default:
 968                 flag.enabled(false);
 969         }
 970
 971         return flag;
 972 }
 973
 974
 975 bool BufferView::dispatch(FuncRequest const & cmd)
 976 {
 977         //lyxerr << [ cmd = " << cmd << "]" << endl;
 978
 979         // Make sure that the cached BufferView is correct.
 980         LYXERR(Debug::ACTION, " action[" << cmd.action << ']'
 981                 << " arg[" << to_utf8(cmd.argument()) << ']'
 982                 << " x[" << cmd.x << ']'
 983                 << " y[" << cmd.y << ']'
 984                 << " button[" << cmd.button() << ']');
 985
 986         Cursor & cur = d->cursor_;
 987
 988         switch (cmd.action) {
 989
 990         case LFUN_UNDO:
 991                 cur.message(_("Undo"));
 992                 cur.clearSelection();
 993                 if (!cur.textUndo())
 994                         cur.message(_("No further undo information"));
 995                 else
 996                         processUpdateFlags(Update::Force | Update::FitCursor);
 997                 break;
 998
 999         case LFUN_REDO:
1000                 cur.message(_("Redo"));
1001                 cur.clearSelection();
1002                 if (!cur.textRedo())
1003                         cur.message(_("No further redo information"));
1004                 else
1005                         processUpdateFlags(Update::Force | Update::FitCursor);
1006                 break;
1007
1008         case LFUN_FONT_STATE:
1009                 cur.message(cur.currentState());
1010                 break;
1011
1012         case LFUN_BOOKMARK_SAVE:
1013                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1014                 break;
1015
1016         case LFUN_LABEL_GOTO: {
1017                 docstring label = cmd.argument();
1018                 if (label.empty()) {
1019                         InsetRef * inset =
1020                                 getInsetByCode<InsetRef>(d->cursor_,
1021                                                          REF_CODE);
1022                         if (inset) {
1023                                 label = inset->getParam("reference");
1024                                 // persistent=false: use temp_bookmark
1025                                 saveBookmark(0);
1026                         }
1027                 }
1028
1029                 if (!label.empty())
1030                         gotoLabel(label);
1031                 break;
1032         }
1033
1034         case LFUN_PARAGRAPH_GOTO: {
1035                 int const id = convert<int>(to_utf8(cmd.argument()));
1036                 int i = 0;
1037                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1038                         b = theBufferList().next(b)) {
1039
1040                         DocIterator dit = b->getParFromID(id);
1041                         if (dit.atEnd()) {
1042                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1043                                 ++i;
1044                                 continue;
1045                         }
1046                         LYXERR(Debug::INFO, "Paragraph " << dit.paragraph().id()
1047                                 << " found in buffer `"
1048                                 << b->absFileName() << "'.");
1049
1050                         if (b == &buffer_) {
1051                                 // Set the cursor
1052                                 setCursor(dit);
1053                                 processUpdateFlags(Update::Force | Update::FitCursor);
1054                         } else {
1055                                 // Switch to other buffer view and resend cmd
1056                                 theLyXFunc().dispatch(FuncRequest(
1057                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1058                                 theLyXFunc().dispatch(cmd);
1059                         }
1060                         break;
1061                 }
1062                 break;
1063         }
1064
1065         case LFUN_NOTE_NEXT:
1066                 gotoInset(this, NOTE_CODE, false);
1067                 break;
1068
1069         case LFUN_REFERENCE_NEXT: {
1070                 vector<InsetCode> tmp;
1071                 tmp.push_back(LABEL_CODE);
1072                 tmp.push_back(REF_CODE);
1073                 gotoInset(this, tmp, true);
1074                 break;
1075         }
1076
1077         case LFUN_CHANGES_TRACK:
1078                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
1079                 break;
1080
1081         case LFUN_CHANGES_OUTPUT:
1082                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
1083                 if (buffer_.params().outputChanges) {
1084                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
1085                         bool xcolorsoul = LaTeXFeatures::isAvailable("soul") &&
1086                                           LaTeXFeatures::isAvailable("xcolor");
1087
1088                         if (!dvipost && !xcolorsoul) {
1089                                 Alert::warning(_("Changes not shown in LaTeX output"),
1090                                                _("Changes will not be highlighted in LaTeX output, "
1091                                                  "because neither dvipost nor xcolor/soul are installed.\n"
1092                                                  "Please install these packages or redefine "
1093                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1094                         } else if (!xcolorsoul) {
1095                                 Alert::warning(_("Changes not shown in LaTeX output"),
1096                                                _("Changes will not be highlighted in LaTeX output "
1097                                                  "when using pdflatex, because xcolor and soul are not installed.\n"
1098                                                  "Please install both packages or redefine "
1099                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1100                         }
1101                 }
1102                 break;
1103
1104         case LFUN_CHANGE_NEXT:
1105                 findNextChange(this);
1106                 break;
1107
1108         case LFUN_CHANGES_MERGE:
1109                 if (findNextChange(this))
1110                         showDialog("changes");
1111                 break;
1112
1113         case LFUN_ALL_CHANGES_ACCEPT:
1114                 // select complete document
1115                 d->cursor_.reset(buffer_.inset());
1116                 d->cursor_.selHandle(true);
1117                 buffer_.text().cursorBottom(d->cursor_);
1118                 // accept everything in a single step to support atomic undo
1119                 buffer_.text().acceptOrRejectChanges(d->cursor_, Text::ACCEPT);
1120                 break;
1121
1122         case LFUN_ALL_CHANGES_REJECT:
1123                 // select complete document
1124                 d->cursor_.reset(buffer_.inset());
1125                 d->cursor_.selHandle(true);
1126                 buffer_.text().cursorBottom(d->cursor_);
1127                 // reject everything in a single step to support atomic undo
1128                 // Note: reject does not work recursively; the user may have to repeat the operation
1129                 buffer_.text().acceptOrRejectChanges(d->cursor_, Text::REJECT);
1130                 break;
1131
1132         case LFUN_WORD_FIND:
1133                 if (find(this, cmd))
1134                         showCursor();
1135                 else
1136                         message(_("String not found!"));
1137                 break;
1138
1139         case LFUN_WORD_REPLACE: {
1140                 bool has_deleted = false;
1141                 if (cur.selection()) {
1142                         DocIterator beg = cur.selectionBegin();
1143                         DocIterator end = cur.selectionEnd();
1144                         if (beg.pit() == end.pit()) {
1145                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1146                                         if (cur.paragraph().isDeleted(p))
1147                                                 has_deleted = true;
1148                                 }
1149                         }
1150                 }
1151                 replace(this, cmd, has_deleted);
1152                 break;
1153         }
1154
1155         case LFUN_MARK_OFF:
1156                 cur.clearSelection();
1157                 cur.resetAnchor();
1158                 cur.message(from_utf8(N_("Mark off")));
1159                 break;
1160
1161         case LFUN_MARK_ON:
1162                 cur.clearSelection();
1163                 cur.mark() = true;
1164                 cur.resetAnchor();
1165                 cur.message(from_utf8(N_("Mark on")));
1166                 break;
1167
1168         case LFUN_MARK_TOGGLE:
1169                 cur.clearSelection();
1170                 if (cur.mark()) {
1171                         cur.mark() = false;
1172                         cur.message(from_utf8(N_("Mark removed")));
1173                 } else {
1174                         cur.mark() = true;
1175                         cur.message(from_utf8(N_("Mark set")));
1176                 }
1177                 cur.resetAnchor();
1178                 break;
1179
1180         case LFUN_SCREEN_RECENTER:
1181                 showCursor();
1182                 break;
1183
1184         case LFUN_BIBTEX_DATABASE_ADD: {
1185                 Cursor tmpcur = d->cursor_;
1186                 findInset(tmpcur, BIBTEX_CODE, false);
1187                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1188                                                 BIBTEX_CODE);
1189                 if (inset) {
1190                         if (inset->addDatabase(to_utf8(cmd.argument())))
1191                                 buffer_.updateBibfilesCache();
1192                 }
1193                 break;
1194         }
1195
1196         case LFUN_BIBTEX_DATABASE_DEL: {
1197                 Cursor tmpcur = d->cursor_;
1198                 findInset(tmpcur, BIBTEX_CODE, false);
1199                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1200                                                 BIBTEX_CODE);
1201                 if (inset) {
1202                         if (inset->delDatabase(to_utf8(cmd.argument())))
1203                                 buffer_.updateBibfilesCache();
1204                 }
1205                 break;
1206         }
1207
1208         case LFUN_STATISTICS: {
1209                 DocIterator from, to;
1210                 if (cur.selection()) {
1211                         from = cur.selectionBegin();
1212                         to = cur.selectionEnd();
1213                 } else {
1214                         from = doc_iterator_begin(buffer_.inset());
1215                         to = doc_iterator_end(buffer_.inset());
1216                 }
1217                 int const words = countWords(from, to);
1218                 int const chars = countChars(from, to, false);
1219                 int const chars_blanks = countChars(from, to, true);
1220                 docstring message;
1221                 if (cur.selection())
1222                         message = _("Statistics for the selection:");
1223                 else
1224                         message = _("Statistics for the document:");
1225                 message += "\n\n";
1226                 if (words != 1)
1227                         message += bformat(_("%1$d words"), words);
1228                 else
1229                         message += _("One word");
1230                 message += "\n";
1231                 if (chars_blanks != 1)
1232                         message += bformat(_("%1$d characters (including blanks)"),
1233                                           chars_blanks);
1234                 else
1235                         message += _("One character (including blanks)");
1236                 message += "\n";
1237                 if (chars != 1)
1238                         message += bformat(_("%1$d characters (excluding blanks)"),
1239                                           chars);
1240                 else
1241                         message += _("One character (excluding blanks)");
1242
1243                 Alert::information(_("Statistics"), message);
1244         }
1245                 break;
1246
1247         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1248                 // turn compression on/off
1249                 buffer_.params().compressed = !buffer_.params().compressed;
1250                 break;
1251
1252         case LFUN_BUFFER_TOGGLE_EMBEDDING: {
1253                 // turn embedding on/off
1254                 try {
1255                         buffer_.embeddedFiles().enable(!buffer_.params().embedded, buffer_, true);
1256                 } catch (ExceptionMessage const & message) {
1257                         Alert::error(message.title_, message.details_);
1258                 }
1259                 break;
1260         }
1261
1262         case LFUN_NEXT_INSET_TOGGLE: {
1263                 // this is the real function we want to invoke
1264                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
1265                 // if there is an inset at cursor, see whether it
1266                 // wants to toggle.
1267                 Inset * inset = cur.nextInset();
1268                 if (inset) {
1269                         if (inset->isActive()) {
1270                                 Cursor tmpcur = cur;
1271                                 tmpcur.pushBackward(*inset);
1272                                 inset->dispatch(tmpcur, tmpcmd);
1273                                 if (tmpcur.result().dispatched()) {
1274                                         cur.dispatched();
1275                                 }
1276                         } else if (inset->editable() == Inset::IS_EDITABLE) {
1277                                 inset->edit(cur, true);
1278                         }
1279                 }
1280                 // if it did not work, try the underlying inset.
1281                 if (!cur.result().dispatched())
1282                         cur.dispatch(tmpcmd);
1283
1284                 if (!cur.result().dispatched())
1285                         // It did not work too; no action needed.
1286                         break;
1287                 cur.clearSelection();
1288                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1289                 break;
1290         }
1291
1292         case LFUN_SCREEN_UP:
1293         case LFUN_SCREEN_DOWN: {
1294                 Point p = getPos(cur, cur.boundary());
1295                 if (p.y_ < 0 || p.y_ > height_) {
1296                         // The cursor is off-screen so recenter before proceeding.
1297                         showCursor();
1298                         p = getPos(cur, cur.boundary());
1299                 }
1300                 scroll(cmd.action == LFUN_SCREEN_UP? - height_ : height_);
1301                 cur.reset(buffer_.inset());
1302                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_);
1303                 //FIXME: what to do with cur.x_target()?
1304                 cur.finishUndo();
1305                 break;
1306         }
1307
1308         case LFUN_SCROLL:
1309                 lfunScroll(cmd);
1310                 break;
1311
1312         case LFUN_SCREEN_UP_SELECT: {
1313                 cur.selHandle(true);
1314                 if (isTopScreen()) {
1315                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1316                         cur.finishUndo();
1317                         break;
1318                 }
1319                 int y = getPos(cur, cur.boundary()).y_;
1320                 int const ymin = y - height_ + defaultRowHeight();
1321                 while (y > ymin && cur.up())
1322                         y = getPos(cur, cur.boundary()).y_;
1323
1324                 cur.finishUndo();
1325                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1326                 break;
1327         }
1328
1329         case LFUN_SCREEN_DOWN_SELECT: {
1330                 cur.selHandle(true);
1331                 if (isBottomScreen()) {
1332                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1333                         cur.finishUndo();
1334                         break;
1335                 }
1336                 int y = getPos(cur, cur.boundary()).y_;
1337                 int const ymax = y + height_ - defaultRowHeight();
1338                 while (y < ymax && cur.down())
1339                         y = getPos(cur, cur.boundary()).y_;
1340
1341                 cur.finishUndo();
1342                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1343                 break;
1344         }
1345
1346         default:
1347                 return false;
1348         }
1349
1350         return true;
1351 }
1352
1353
1354 docstring const BufferView::requestSelection()
1355 {
1356         Cursor & cur = d->cursor_;
1357
1358         if (!cur.selection()) {
1359                 d->xsel_cache_.set = false;
1360                 return docstring();
1361         }
1362
1363         if (!d->xsel_cache_.set ||
1364             cur.top() != d->xsel_cache_.cursor ||
1365             cur.anchor_.top() != d->xsel_cache_.anchor)
1366         {
1367                 d->xsel_cache_.cursor = cur.top();
1368                 d->xsel_cache_.anchor = cur.anchor_.top();
1369                 d->xsel_cache_.set = cur.selection();
1370                 return cur.selectionAsString(false);
1371         }
1372         return docstring();
1373 }
1374
1375
1376 void BufferView::clearSelection()
1377 {
1378         d->cursor_.clearSelection();
1379         // Clear the selection buffer. Otherwise a subsequent
1380         // middle-mouse-button paste would use the selection buffer,
1381         // not the more current external selection.
1382         cap::clearSelection();
1383         d->xsel_cache_.set = false;
1384         // The buffer did not really change, but this causes the
1385         // redraw we need because we cleared the selection above.
1386         buffer_.changed();
1387 }
1388
1389
1390 void BufferView::resize(int width, int height)
1391 {
1392         // Update from work area
1393         width_ = width;
1394         height_ = height;
1395
1396         // Clear the paragraph height cache.
1397         d->par_height_.clear();
1398         // Redo the metrics.
1399         updateMetrics();
1400 }
1401
1402
1403 Inset const * BufferView::getCoveringInset(Text const & text,
1404                 int x, int y) const
1405 {
1406         TextMetrics & tm = d->text_metrics_[&text];
1407         Inset * inset = tm.checkInsetHit(x, y);
1408         if (!inset)
1409                 return 0;
1410
1411         if (!inset->descendable())
1412                 // No need to go further down if the inset is not
1413                 // descendable.
1414                 return inset;
1415
1416         size_t cell_number = inset->nargs();
1417         // Check all the inner cell.
1418         for (size_t i = 0; i != cell_number; ++i) {
1419                 Text const * inner_text = inset->getText(i);
1420                 if (inner_text) {
1421                         // Try deeper.
1422                         Inset const * inset_deeper =
1423                                 getCoveringInset(*inner_text, x, y);
1424                         if (inset_deeper)
1425                                 return inset_deeper;
1426                 }
1427         }
1428
1429         return inset;
1430 }
1431
1432
1433 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
1434 {
1435         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
1436
1437         // This is only called for mouse related events including
1438         // LFUN_FILE_OPEN generated by drag-and-drop.
1439         FuncRequest cmd = cmd0;
1440
1441         Cursor old = cursor();
1442         Cursor cur(*this);
1443         cur.push(buffer_.inset());
1444         cur.selection() = d->cursor_.selection();
1445
1446         // Either the inset under the cursor or the
1447         // surrounding Text will handle this event.
1448
1449         // make sure we stay within the screen...
1450         cmd.y = min(max(cmd.y, -1), height_);
1451
1452         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1453
1454                 // Get inset under mouse, if there is one.
1455                 Inset const * covering_inset =
1456                         getCoveringInset(buffer_.text(), cmd.x, cmd.y);
1457                 if (covering_inset == d->last_inset_)
1458                         // Same inset, no need to do anything...
1459                         return;
1460
1461                 bool need_redraw = false;
1462                 // const_cast because of setMouseHover().
1463                 Inset * inset = const_cast<Inset *>(covering_inset);
1464                 if (d->last_inset_)
1465                         // Remove the hint on the last hovered inset (if any).
1466                         need_redraw |= d->last_inset_->setMouseHover(false);
1467                 if (inset)
1468                         // Highlighted the newly hovered inset (if any).
1469                         need_redraw |= inset->setMouseHover(true);
1470                 d->last_inset_ = inset;
1471                 if (!need_redraw)
1472                         return;
1473
1474                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
1475                         << cmd.x << ", " << cmd.y << ")");
1476
1477                 d->update_strategy_ = DecorationUpdate;
1478
1479                 // This event (moving without mouse click) is not passed further.
1480                 // This should be changed if it is further utilized.
1481                 buffer_.changed();
1482                 return;
1483         }
1484
1485         // Build temporary cursor.
1486         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x, cmd.y);
1487
1488         // Put anchor at the same position.
1489         cur.resetAnchor();
1490
1491         // Try to dispatch to an non-editable inset near this position
1492         // via the temp cursor. If the inset wishes to change the real
1493         // cursor it has to do so explicitly by using
1494         //  cur.bv().cursor() = cur;  (or similar)
1495         if (inset)
1496                 inset->dispatch(cur, cmd);
1497
1498         // Now dispatch to the temporary cursor. If the real cursor should
1499         // be modified, the inset's dispatch has to do so explicitly.
1500         if (!cur.result().dispatched())
1501                 cur.dispatch(cmd);
1502
1503         // Notify left insets
1504         if (cur != old) {
1505                 old.fixIfBroken();
1506                 bool badcursor = notifyCursorLeaves(old, cur);
1507                 if (badcursor)
1508                         cursor().fixIfBroken();
1509         }
1510
1511         // Do we have a selection?
1512         theSelection().haveSelection(cursor().selection());
1513
1514         // If the command has been dispatched,
1515         if (cur.result().dispatched() || cur.result().update())
1516                 processUpdateFlags(cur.result().update());
1517 }
1518
1519
1520 void BufferView::lfunScroll(FuncRequest const & cmd)
1521 {
1522         string const scroll_type = cmd.getArg(0);
1523         int const scroll_step =
1524                 (scroll_type == "line")? d->scrollbarParameters_.single_step
1525                 : (scroll_type == "page")? d->scrollbarParameters_.page_step : 0;
1526         if (scroll_step == 0)
1527                 return;
1528         string const scroll_quantity = cmd.getArg(1);
1529         if (scroll_quantity == "up")
1530                 scrollUp(scroll_step);
1531         else if (scroll_quantity == "down")
1532                 scrollDown(scroll_step);
1533         else {
1534                 int const scroll_value = convert<int>(scroll_quantity);
1535                 if (scroll_value)
1536                         scroll(scroll_step * scroll_value);
1537         }
1538 }
1539
1540
1541 void BufferView::scroll(int y)
1542 {
1543         if (y > 0)
1544                 scrollDown(y);
1545         else if (y < 0)
1546                 scrollUp(-y);
1547 }
1548
1549
1550 void BufferView::scrollDown(int offset)
1551 {
1552         Text * text = &buffer_.text();
1553         TextMetrics & tm = d->text_metrics_[text];
1554         int ymax = height_ + offset;
1555         while (true) {
1556                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
1557                 int bottom_pos = last.second->position() + last.second->descent();
1558                 if (last.first + 1 == int(text->paragraphs().size())) {
1559                         if (bottom_pos <= height_)
1560                                 return;
1561                         offset = min(offset, bottom_pos - height_);
1562                         break;
1563                 }
1564                 if (bottom_pos > ymax)
1565                         break;
1566                 tm.newParMetricsDown();
1567         }
1568         d->anchor_ypos_ -= offset;
1569         updateMetrics();
1570         buffer_.changed();
1571 }
1572
1573
1574 void BufferView::scrollUp(int offset)
1575 {
1576         Text * text = &buffer_.text();
1577         TextMetrics & tm = d->text_metrics_[text];
1578         int ymin = - offset;
1579         while (true) {
1580                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
1581                 int top_pos = first.second->position() - first.second->ascent();
1582                 if (first.first == 0) {
1583                         if (top_pos >= 0)
1584                                 return;
1585                         offset = min(offset, - top_pos);
1586                         break;
1587                 }
1588                 if (top_pos < ymin)
1589                         break;
1590                 tm.newParMetricsUp();
1591         }
1592         d->anchor_ypos_ += offset;
1593         updateMetrics();
1594         buffer_.changed();
1595 }
1596
1597
1598 void BufferView::setCursorFromRow(int row)
1599 {
1600         int tmpid = -1;
1601         int tmppos = -1;
1602
1603         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
1604
1605         d->cursor_.reset(buffer_.inset());
1606         if (tmpid == -1)
1607                 buffer_.text().setCursor(d->cursor_, 0, 0);
1608         else
1609                 buffer_.text().setCursor(d->cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
1610 }
1611
1612
1613 void BufferView::gotoLabel(docstring const & label)
1614 {
1615         Toc & toc = buffer().tocBackend().toc("label");
1616         TocIterator toc_it = toc.begin();
1617         TocIterator end = toc.end();
1618         for (; toc_it != end; ++toc_it) {
1619                 if (label == toc_it->str())
1620                         dispatch(toc_it->action());
1621         }
1622         //FIXME: We could do a bit more searching thanks to this:
1623         //InsetLabel const * inset = buffer_.insetLabel(label);
1624 }
1625
1626
1627 TextMetrics const & BufferView::textMetrics(Text const * t) const
1628 {
1629         return const_cast<BufferView *>(this)->textMetrics(t);
1630 }
1631
1632
1633 TextMetrics & BufferView::textMetrics(Text const * t)
1634 {
1635         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
1636         if (tmc_it == d->text_metrics_.end()) {
1637                 tmc_it = d->text_metrics_.insert(
1638                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
1639         }
1640         return tmc_it->second;
1641 }
1642
1643
1644 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
1645                 pit_type pit) const
1646 {
1647         return textMetrics(t).parMetrics(pit);
1648 }
1649
1650
1651 int BufferView::workHeight() const
1652 {
1653         return height_;
1654 }
1655
1656
1657 void BufferView::setCursor(DocIterator const & dit)
1658 {
1659         size_t const n = dit.depth();
1660         for (size_t i = 0; i < n; ++i)
1661                 dit[i].inset().edit(d->cursor_, true);
1662
1663         d->cursor_.setCursor(dit);
1664         d->cursor_.selection() = false;
1665 }
1666
1667
1668 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
1669 {
1670         // Would be wrong to delete anything if we have a selection.
1671         if (cur.selection())
1672                 return false;
1673
1674         bool need_anchor_change = false;
1675         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1676                 need_anchor_change);
1677
1678         if (need_anchor_change)
1679                 cur.resetAnchor();
1680
1681         if (!changed)
1682                 return false;
1683
1684         d->cursor_ = cur;
1685
1686         updateLabels(buffer_);
1687
1688         updateMetrics();
1689         buffer_.changed();
1690         return true;
1691 }
1692
1693
1694 bool BufferView::mouseSetCursor(Cursor & cur, bool select)
1695 {
1696         BOOST_ASSERT(&cur.bv() == this);
1697
1698         if (!select)
1699                 // this event will clear selection so we save selection for
1700                 // persistent selection
1701                 cap::saveSelection(cursor());
1702
1703         // Has the cursor just left the inset?
1704         bool badcursor = false;
1705         bool leftinset = (&d->cursor_.inset() != &cur.inset());
1706         if (leftinset) {
1707                 d->cursor_.fixIfBroken();
1708                 badcursor = notifyCursorLeaves(d->cursor_, cur);
1709                 if (badcursor)
1710                         cur.fixIfBroken();
1711         }
1712
1713         // FIXME: shift-mouse selection doesn't work well across insets.
1714         bool do_selection = select && &d->cursor_.anchor().inset() == &cur.inset();
1715
1716         // do the dEPM magic if needed
1717         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
1718         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
1719         // the leftinset bool would not be necessary (badcursor instead).
1720         bool update = leftinset;
1721         if (!do_selection && !badcursor && d->cursor_.inTexted())
1722                 update |= checkDepm(cur, d->cursor_);
1723
1724         d->cursor_.setCursor(cur);
1725         d->cursor_.boundary(cur.boundary());
1726         if (do_selection)
1727                 d->cursor_.setSelection();
1728         else
1729                 d->cursor_.clearSelection();
1730
1731         d->cursor_.finishUndo();
1732         d->cursor_.setCurrentFont();
1733         return update;
1734 }
1735
1736
1737 void BufferView::putSelectionAt(DocIterator const & cur,
1738                                 int length, bool backwards)
1739 {
1740         d->cursor_.clearSelection();
1741
1742         setCursor(cur);
1743
1744         if (length) {
1745                 if (backwards) {
1746                         d->cursor_.pos() += length;
1747                         d->cursor_.setSelection(d->cursor_, -length);
1748                 } else
1749                         d->cursor_.setSelection(d->cursor_, length);
1750         }
1751         // Ensure a redraw happens in any case because the new selection could
1752         // possibly be on the same screen as the previous selection.
1753         processUpdateFlags(Update::Force | Update::FitCursor);
1754 }
1755
1756
1757 Cursor & BufferView::cursor()
1758 {
1759         return d->cursor_;
1760 }
1761
1762
1763 Cursor const & BufferView::cursor() const
1764 {
1765         return d->cursor_;
1766 }
1767
1768
1769 pit_type BufferView::anchor_ref() const
1770 {
1771         return d->anchor_pit_;
1772 }
1773
1774
1775 bool BufferView::singleParUpdate()
1776 {
1777         Text & buftext = buffer_.text();
1778         pit_type const bottom_pit = d->cursor_.bottom().pit();
1779         TextMetrics & tm = textMetrics(&buftext);
1780         int old_height = tm.parMetrics(bottom_pit).height();
1781
1782         // make sure inline completion pointer is ok
1783         if (d->inlineCompletionPos.fixIfBroken())
1784                 d->inlineCompletionPos = DocIterator();
1785
1786         // In Single Paragraph mode, rebreak only
1787         // the (main text, not inset!) paragraph containing the cursor.
1788         // (if this paragraph contains insets etc., rebreaking will
1789         // recursively descend)
1790         tm.redoParagraph(bottom_pit);
1791         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
1792         if (pm.height() != old_height)
1793                 // Paragraph height has changed so we cannot proceed to
1794                 // the singlePar optimisation.
1795                 return false;
1796
1797         d->update_strategy_ = SingleParUpdate;
1798
1799         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
1800                 << " y2: " << pm.position() + pm.descent()
1801                 << " pit: " << bottom_pit
1802                 << " singlepar: 1");
1803         return true;
1804 }
1805
1806
1807 void BufferView::updateMetrics()
1808 {
1809         Text & buftext = buffer_.text();
1810         pit_type const npit = int(buftext.paragraphs().size());
1811
1812         // Clear out the position cache in case of full screen redraw,
1813         d->coord_cache_.clear();
1814
1815         // Clear out paragraph metrics to avoid having invalid metrics
1816         // in the cache from paragraphs not relayouted below
1817         // The complete text metrics will be redone.
1818         d->text_metrics_.clear();
1819
1820         TextMetrics & tm = textMetrics(&buftext);
1821
1822         // make sure inline completion pointer is ok
1823         if (d->inlineCompletionPos.fixIfBroken())
1824                 d->inlineCompletionPos = DocIterator();
1825
1826         if (d->anchor_pit_ >= npit)
1827                 // The anchor pit must have been deleted...
1828                 d->anchor_pit_ = npit - 1;
1829
1830         // Rebreak anchor paragraph.
1831         tm.redoParagraph(d->anchor_pit_);
1832         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
1833
1834         // position anchor
1835         if (d->anchor_pit_ == 0) {
1836                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
1837
1838                 // Complete buffer visible? Then it's easy.
1839                 if (scrollRange == 0)
1840                         d->anchor_ypos_ = anchor_pm.ascent();
1841
1842                 // FIXME: Some clever handling needed to show
1843                 // the _first_ paragraph up to the top if the cursor is
1844                 // in the first line.
1845         }
1846         anchor_pm.setPosition(d->anchor_ypos_);
1847
1848         LYXERR(Debug::PAINTING, "metrics: "
1849                 << " anchor pit = " << d->anchor_pit_
1850                 << " anchor ypos = " << d->anchor_ypos_);
1851
1852         // Redo paragraphs above anchor if necessary.
1853         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
1854         // We are now just above the anchor paragraph.
1855         pit_type pit1 = d->anchor_pit_ - 1;
1856         for (; pit1 >= 0 && y1 >= 0; --pit1) {
1857                 tm.redoParagraph(pit1);
1858                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
1859                 y1 -= pm.descent();
1860                 // Save the paragraph position in the cache.
1861                 pm.setPosition(y1);
1862                 y1 -= pm.ascent();
1863         }
1864
1865         // Redo paragraphs below the anchor if necessary.
1866         int y2 = d->anchor_ypos_ + anchor_pm.descent();
1867         // We are now just below the anchor paragraph.
1868         pit_type pit2 = d->anchor_pit_ + 1;
1869         for (; pit2 < npit && y2 <= height_; ++pit2) {
1870                 tm.redoParagraph(pit2);
1871                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
1872                 y2 += pm.ascent();
1873                 // Save the paragraph position in the cache.
1874                 pm.setPosition(y2);
1875                 y2 += pm.descent();
1876         }
1877
1878         LYXERR(Debug::PAINTING, "Metrics: "
1879                 << " anchor pit = " << d->anchor_pit_
1880                 << " anchor ypos = " << d->anchor_ypos_
1881                 << " y1 = " << y1
1882                 << " y2 = " << y2
1883                 << " pit1 = " << pit1
1884                 << " pit2 = " << pit2);
1885
1886         d->update_strategy_ = FullScreenUpdate;
1887
1888         if (lyxerr.debugging(Debug::WORKAREA)) {
1889                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
1890                 d->coord_cache_.dump();
1891         }
1892 }
1893
1894
1895 void BufferView::insertLyXFile(FileName const & fname)
1896 {
1897         BOOST_ASSERT(d->cursor_.inTexted());
1898
1899         // Get absolute path of file and add ".lyx"
1900         // to the filename if necessary
1901         FileName filename = fileSearch(string(), fname.absFilename(), "lyx");
1902
1903         docstring const disp_fn = makeDisplayPath(filename.absFilename());
1904         // emit message signal.
1905         message(bformat(_("Inserting document %1$s..."), disp_fn));
1906
1907         docstring res;
1908         Buffer buf("", false);
1909         if (buf.loadLyXFile(filename)) {
1910                 ErrorList & el = buffer_.errorList("Parse");
1911                 // Copy the inserted document error list into the current buffer one.
1912                 el = buf.errorList("Parse");
1913                 buffer_.undo().recordUndo(d->cursor_);
1914                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
1915                                              buf.params().documentClassPtr(), el);
1916                 res = _("Document %1$s inserted.");
1917         } else {
1918                 res = _("Could not insert document %1$s");
1919         }
1920
1921         updateMetrics();
1922         buffer_.changed();
1923         // emit message signal.
1924         message(bformat(res, disp_fn));
1925         buffer_.errors("Parse");
1926 }
1927
1928
1929 Point BufferView::coordOffset(DocIterator const & dit, bool boundary) const
1930 {
1931         int x = 0;
1932         int y = 0;
1933         int lastw = 0;
1934
1935         // Addup contribution of nested insets, from inside to outside,
1936         // keeping the outer paragraph for a special handling below
1937         for (size_t i = dit.depth() - 1; i >= 1; --i) {
1938                 CursorSlice const & sl = dit[i];
1939                 int xx = 0;
1940                 int yy = 0;
1941
1942                 // get relative position inside sl.inset()
1943                 sl.inset().cursorPos(*this, sl, boundary && (i + 1 == dit.depth()), xx, yy);
1944
1945                 // Make relative position inside of the edited inset relative to sl.inset()
1946                 x += xx;
1947                 y += yy;
1948
1949                 // In case of an RTL inset, the edited inset will be positioned to the left
1950                 // of xx:yy
1951                 if (sl.text()) {
1952                         bool boundary_i = boundary && i + 1 == dit.depth();
1953                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
1954                         if (rtl)
1955                                 x -= lastw;
1956                 }
1957
1958                 // remember width for the case that sl.inset() is positioned in an RTL inset
1959                 if (i && dit[i - 1].text()) {
1960                         // If this Inset is inside a Text Inset, retrieve the Dimension
1961                         // from the containing text instead of using Inset::dimension() which
1962                         // might not be implemented.
1963                         // FIXME (Abdel 23/09/2007): this is a bit messy because of the
1964                         // elimination of Inset::dim_ cache. This coordOffset() method needs
1965                         // to be rewritten in light of the new design.
1966                         Dimension const & dim = parMetrics(dit[i - 1].text(),
1967                                 dit[i - 1].pit()).insetDimension(&sl.inset());
1968                         lastw = dim.wid;
1969                 } else {
1970                         Dimension const dim = sl.inset().dimension(*this);
1971                         lastw = dim.wid;
1972                 }
1973
1974                 //lyxerr << "Cursor::getPos, i: "
1975                 // << i << " x: " << xx << " y: " << y << endl;
1976         }
1977
1978         // Add contribution of initial rows of outermost paragraph
1979         CursorSlice const & sl = dit[0];
1980         TextMetrics const & tm = textMetrics(sl.text());
1981         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
1982         BOOST_ASSERT(!pm.rows().empty());
1983         y -= pm.rows()[0].ascent();
1984 #if 1
1985         // FIXME: document this mess
1986         size_t rend;
1987         if (sl.pos() > 0 && dit.depth() == 1) {
1988                 int pos = sl.pos();
1989                 if (pos && boundary)
1990                         --pos;
1991 //              lyxerr << "coordOffset: boundary:" << boundary << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
1992                 rend = pm.pos2row(pos);
1993         } else
1994                 rend = pm.pos2row(sl.pos());
1995 #else
1996         size_t rend = pm.pos2row(sl.pos());
1997 #endif
1998         for (size_t rit = 0; rit != rend; ++rit)
1999                 y += pm.rows()[rit].height();
2000         y += pm.rows()[rend].ascent();
2001
2002         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2003
2004         // Make relative position from the nested inset now bufferview absolute.
2005         int xx = bottom_tm.cursorX(dit.bottom(), boundary && dit.depth() == 1);
2006         x += xx;
2007
2008         // In the RTL case place the nested inset at the left of the cursor in
2009         // the outer paragraph
2010         bool boundary_1 = boundary && 1 == dit.depth();
2011         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2012         if (rtl)
2013                 x -= lastw;
2014
2015         return Point(x, y);
2016 }
2017
2018
2019 Point BufferView::getPos(DocIterator const & dit, bool boundary) const
2020 {
2021         CursorSlice const & bot = dit.bottom();
2022         TextMetrics const & tm = textMetrics(bot.text());
2023         if (!tm.contains(bot.pit()))
2024                 return Point(-1, -1);
2025
2026         Point p = coordOffset(dit, boundary); // offset from outer paragraph
2027         p.y_ += tm.parMetrics(bot.pit()).position();
2028         return p;
2029 }
2030
2031
2032 void BufferView::draw(frontend::Painter & pain)
2033 {
2034         LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
2035         Text & text = buffer_.text();
2036         TextMetrics const & tm = d->text_metrics_[&text];
2037         int const y = tm.first().second->position();
2038         PainterInfo pi(this, pain);
2039
2040         switch (d->update_strategy_) {
2041
2042         case NoScreenUpdate:
2043                 // If no screen painting is actually needed, only some the different
2044                 // coordinates of insets and paragraphs needs to be updated.
2045                 pi.full_repaint = true;
2046                 pi.pain.setDrawingEnabled(false);
2047                 tm.draw(pi, 0, y);
2048                 break;
2049
2050         case SingleParUpdate:
2051                 pi.full_repaint = false;
2052                 // In general, only the current row of the outermost paragraph
2053                 // will be redrawn. Particular cases where selection spans
2054                 // multiple paragraph are correctly detected in TextMetrics.
2055                 tm.draw(pi, 0, y);
2056                 break;
2057
2058         case DecorationUpdate:
2059                 // FIXME: We should also distinguish DecorationUpdate to avoid text
2060                 // drawing if possible. This is not possible to do easily right now
2061                 // because of the single backing pixmap.
2062
2063         case FullScreenUpdate:
2064                 // The whole screen, including insets, will be refreshed.
2065                 pi.full_repaint = true;
2066
2067                 // Clear background.
2068                 pain.fillRectangle(0, 0, width_, height_,
2069                         buffer_.inset().backgroundColor());
2070
2071                 // Draw everything.
2072                 tm.draw(pi, 0, y);
2073
2074                 // and possibly grey out below
2075                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2076                 int const y2 = lastpm.second->position() + lastpm.second->descent();
2077                 if (y2 < height_)
2078                         pain.fillRectangle(0, y2, width_, height_ - y2, Color_bottomarea);
2079                 break;
2080         }
2081         LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
2082
2083         // The scrollbar needs an update.
2084         updateScrollbar();
2085
2086         // Normalize anchor for next time
2087         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
2088         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2089         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
2090                 ParagraphMetrics const & pm = tm.parMetrics(pit);
2091                 if (pm.position() + pm.descent() > 0) {
2092                         d->anchor_pit_ = pit;
2093                         d->anchor_ypos_ = pm.position();
2094                         break;
2095                 }
2096         }
2097         LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
2098                 << "  anchor ypos = " << d->anchor_ypos_);
2099 }
2100
2101
2102 void BufferView::message(docstring const & msg)
2103 {
2104         if (d->gui_)
2105                 d->gui_->message(msg);
2106 }
2107
2108
2109 void BufferView::showDialog(string const & name)
2110 {
2111         if (d->gui_)
2112                 d->gui_->showDialog(name, string());
2113 }
2114
2115
2116 void BufferView::showDialog(string const & name,
2117         string const & data, Inset * inset)
2118 {
2119         if (d->gui_)
2120                 d->gui_->showDialog(name, data, inset);
2121 }
2122
2123
2124 void BufferView::updateDialog(string const & name, string const & data)
2125 {
2126         if (d->gui_)
2127                 d->gui_->updateDialog(name, data);
2128 }
2129
2130
2131 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
2132 {
2133         d->gui_ = gui;
2134 }
2135
2136
2137 // FIXME: Move this out of BufferView again
2138 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
2139 {
2140         if (!fname.isReadableFile()) {
2141                 docstring const error = from_ascii(strerror(errno));
2142                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2143                 docstring const text =
2144                   bformat(_("Could not read the specified document\n"
2145                             "%1$s\ndue to the error: %2$s"), file, error);
2146                 Alert::error(_("Could not read file"), text);
2147                 return docstring();
2148         }
2149
2150         if (!fname.isReadableFile()) {
2151                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2152                 docstring const text =
2153                   bformat(_("%1$s\n is not readable."), file);
2154                 Alert::error(_("Could not open file"), text);
2155                 return docstring();
2156         }
2157
2158         // FIXME UNICODE: We don't know the encoding of the file
2159         docstring file_content = fname.fileContents("UTF-8");
2160         if (file_content.empty()) {
2161                 Alert::error(_("Reading not UTF-8 encoded file"),
2162                              _("The file is not UTF-8 encoded.\n"
2163                                "It will be read as local 8Bit-encoded.\n"
2164                                "If this does not give the correct result\n"
2165                                "then please change the encoding of the file\n"
2166                                "to UTF-8 with a program other than LyX.\n"));
2167                 file_content = fname.fileContents("local8bit");
2168         }
2169
2170         return normalize_c(file_content);
2171 }
2172
2173
2174 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
2175 {
2176         docstring const tmpstr = contentsOfPlaintextFile(f);
2177
2178         if (tmpstr.empty())
2179                 return;
2180
2181         Cursor & cur = cursor();
2182         cap::replaceSelection(cur);
2183         buffer_.undo().recordUndo(cur);
2184         if (asParagraph)
2185                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr);
2186         else
2187                 cur.innerText()->insertStringAsLines(cur, tmpstr);
2188
2189         updateMetrics();
2190         buffer_.changed();
2191 }
2192
2193
2194 docstring const & BufferView::inlineCompletion() const
2195 {
2196         return d->inlineCompletion;
2197 }
2198
2199
2200 size_t const & BufferView::inlineCompletionUniqueChars() const
2201 {
2202         return d->inlineCompletionUniqueChars;
2203 }
2204
2205
2206 DocIterator const & BufferView::inlineCompletionPos() const
2207 {
2208         return d->inlineCompletionPos;
2209 }
2210
2211
2212 bool samePar(DocIterator const & a, DocIterator const & b)
2213 {
2214         if (a.empty() && b.empty())
2215                 return true;
2216         if (a.empty() || b.empty())
2217                 return false;
2218         return &a.innerParagraph() == &b.innerParagraph();
2219 }
2220
2221
2222 void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
2223         docstring const & completion, size_t uniqueChars)
2224 {
2225         uniqueChars = min(completion.size(), uniqueChars);
2226         bool changed = d->inlineCompletion != completion
2227                 || d->inlineCompletionUniqueChars != uniqueChars;
2228         bool singlePar = true;
2229         d->inlineCompletion = completion;
2230         d->inlineCompletionUniqueChars = min(completion.size(), uniqueChars);
2231
2232         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
2233
2234         // at new position?
2235         DocIterator const & old = d->inlineCompletionPos;
2236         if (old != pos) {
2237                 //lyxerr << "inlineCompletionPos changed" << std::endl;
2238                 // old or pos are in another paragraph?
2239                 if ((!samePar(cur, pos) && !pos.empty())
2240                     || (!samePar(cur, old) && !old.empty())) {
2241                         singlePar = false;
2242                         //lyxerr << "different paragraph" << std::endl;
2243                 }
2244                 d->inlineCompletionPos = pos;
2245         }
2246
2247         // set update flags
2248         if (changed) {
2249                 if (singlePar && !(cur.disp_.update() & Update::Force))
2250                         cur.updateFlags(cur.disp_.update() | Update::SinglePar);
2251                 else
2252                         cur.updateFlags(cur.disp_.update() | Update::Force);
2253         }
2254 }
2255
2256 } // namespace lyx