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/InsetCommand.h" // ChangeRefs
  58 #include "insets/InsetExternal.h"
  59 #include "insets/InsetGraphics.h"
  60 #include "insets/InsetNote.h"
  61 #include "insets/InsetRef.h"
  62 #include "insets/InsetText.h"
  63
  64 #include "frontends/alert.h"
  65 #include "frontends/Application.h"
  66 #include "frontends/Delegates.h"
  67 #include "frontends/FontMetrics.h"
  68 #include "frontends/Painter.h"
  69 #include "frontends/Selection.h"
  70
  71 #include "support/convert.h"
  72 #include "support/debug.h"
  73 #include "support/ExceptionMessage.h"
  74 #include "support/filetools.h"
  75 #include "support/gettext.h"
  76 #include "support/lassert.h"
  77 #include "support/lstrings.h"
  78 #include "support/Package.h"
  79 #include "support/types.h"
  80
  81 #include <cerrno>
  82 #include <fstream>
  83 #include <functional>
  84 #include <iterator>
  85 #include <sstream>
  86 #include <vector>
  87
  88 using namespace std;
  89 using namespace lyx::support;
  90
  91 namespace lyx {
  92
  93 namespace Alert = frontend::Alert;
  94
  95 namespace {
  96
  97 /// Return an inset of this class if it exists at the current cursor position
  98 template <class T>
  99 T * getInsetByCode(Cursor const & cur, InsetCode code)
 100 {
 101         DocIterator it = cur;
 102         Inset * inset = it.nextInset();
 103         if (inset && inset->lyxCode() == code)
 104                 return static_cast<T*>(inset);
 105         return 0;
 106 }
 107
 108 /// Note that comparing contents can only be used for InsetCommand
 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                         bool const valid_code = std::find(codes.begin(), codes.end(),
 118                                 inset->lyxCode()) != codes.end();
 119                         InsetCommand const * ic = inset->asInsetCommand();
 120                         bool const same_or_no_contents =  contents.empty()
 121                                 || (ic && (ic->getFirstNonOptParam() == contents));
 122
 123                         if (valid_code && same_or_no_contents) {
 124                                 dit = tmpdit;
 125                                 return true;
 126                         }
 127                 }
 128                 tmpdit.forwardInset();
 129         }
 130
 131         return false;
 132 }
 133
 134
 135 /// Looks for next inset with one of the given codes.
 136 /// Note that same_content can only be used for InsetCommand
 137 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 138         bool same_content)
 139 {
 140         docstring contents;
 141         DocIterator tmpdit = dit;
 142         tmpdit.forwardInset();
 143         if (!tmpdit)
 144                 return false;
 145
 146         Inset const * inset = tmpdit.nextInset();
 147         if (same_content && inset) {
 148                 InsetCommand const * ic = inset->asInsetCommand();
 149                 if (ic) {
 150                         bool const valid_code = std::find(codes.begin(), codes.end(),
 151                                 ic->lyxCode()) != codes.end();
 152                         if (valid_code)
 153                                 contents = ic->getFirstNonOptParam();
 154                 }
 155         }
 156
 157         if (!findNextInset(tmpdit, codes, contents)) {
 158                 if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
 159                         Inset * inset = &tmpdit.bottom().inset();
 160                         tmpdit = doc_iterator_begin(&inset->buffer(), inset);
 161                         if (!findNextInset(tmpdit, codes, contents))
 162                                 return false;
 163                 } else {
 164                         return false;
 165                 }
 166         }
 167
 168         dit = tmpdit;
 169         return true;
 170 }
 171
 172
 173 /// Looks for next inset with the given code
 174 void findInset(DocIterator & dit, InsetCode code, bool same_content)
 175 {
 176         findInset(dit, vector<InsetCode>(1, code), same_content);
 177 }
 178
 179
 180 /// Moves cursor to the next inset with one of the given codes.
 181 void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
 182                bool same_content)
 183 {
 184         Cursor tmpcur = bv->cursor();
 185         if (!findInset(tmpcur, codes, same_content)) {
 186                 bv->cursor().message(_("No more insets"));
 187                 return;
 188         }
 189
 190         tmpcur.clearSelection();
 191         bv->setCursor(tmpcur);
 192         bv->showCursor();
 193 }
 194
 195
 196 /// Moves cursor to the next inset with given code.
 197 void gotoInset(BufferView * bv, InsetCode code, bool same_content)
 198 {
 199         gotoInset(bv, vector<InsetCode>(1, code), same_content);
 200 }
 201
 202
 203 /// A map from a Text to the associated text metrics
 204 typedef map<Text const *, TextMetrics> TextMetricsCache;
 205
 206 enum ScreenUpdateStrategy {
 207         NoScreenUpdate,
 208         SingleParUpdate,
 209         FullScreenUpdate,
 210         DecorationUpdate
 211 };
 212
 213 } // anon namespace
 214
 215
 216 /////////////////////////////////////////////////////////////////////
 217 //
 218 // BufferView
 219 //
 220 /////////////////////////////////////////////////////////////////////
 221
 222 struct BufferView::Private
 223 {
 224         Private(BufferView & bv): wh_(0), cursor_(bv),
 225                 anchor_pit_(0), anchor_ypos_(0),
 226                 inlineCompletionUniqueChars_(0),
 227                 last_inset_(0), clickable_inset_(false),
 228                 mouse_position_cache_(),
 229                 bookmark_edit_position_(-1), gui_(0)
 230         {}
 231
 232         ///
 233         ScrollbarParameters scrollbarParameters_;
 234         ///
 235         ScreenUpdateStrategy update_strategy_;
 236         ///
 237         CoordCache coord_cache_;
 238
 239         /// Estimated average par height for scrollbar.
 240         int wh_;
 241         /// this is used to handle XSelection events in the right manner.
 242         struct {
 243                 CursorSlice cursor;
 244                 CursorSlice anchor;
 245                 bool set;
 246         } xsel_cache_;
 247         ///
 248         Cursor cursor_;
 249         ///
 250         pit_type anchor_pit_;
 251         ///
 252         int anchor_ypos_;
 253         ///
 254         vector<int> par_height_;
 255
 256         ///
 257         DocIterator inlineCompletionPos_;
 258         ///
 259         docstring inlineCompletion_;
 260         ///
 261         size_t inlineCompletionUniqueChars_;
 262
 263         /// keyboard mapping object.
 264         Intl intl_;
 265
 266         /// last visited inset.
 267         /** kept to send setMouseHover(false).
 268           * Not owned, so don't delete.
 269           */
 270         Inset const * last_inset_;
 271         /// are we hovering something that we can click
 272         bool clickable_inset_;
 273
 274         /// position of the mouse at the time of the last mouse move
 275         /// This is used to update the hovering status of inset in
 276         /// cases where the buffer is scrolled, but the mouse didn't move.
 277         Point mouse_position_cache_;
 278
 279         // cache for id of the paragraph which was edited the last time
 280         int bookmark_edit_position_;
 281
 282         mutable TextMetricsCache text_metrics_;
 283
 284         /// Whom to notify.
 285         /** Not owned, so don't delete.
 286           */
 287         frontend::GuiBufferViewDelegate * gui_;
 288
 289         /// Cache for Find Next
 290         FuncRequest search_request_cache_;
 291
 292         ///
 293         map<string, Inset *> edited_insets_;
 294 };
 295
 296
 297 BufferView::BufferView(Buffer & buf)
 298         : width_(0), height_(0), full_screen_(false), buffer_(buf),
 299       d(new Private(*this))
 300 {
 301         d->xsel_cache_.set = false;
 302         d->intl_.initKeyMapper(lyxrc.use_kbmap);
 303
 304         d->cursor_.setBuffer(&buf);
 305         d->cursor_.push(buffer_.inset());
 306         d->cursor_.resetAnchor();
 307         d->cursor_.setCurrentFont();
 308
 309         buffer_.updatePreviews();
 310 }
 311
 312
 313 BufferView::~BufferView()
 314 {
 315         // current buffer is going to be switched-off, save cursor pos
 316         // Ideally, the whole cursor stack should be saved, but session
 317         // currently can only handle bottom (whole document) level pit and pos.
 318         // That is to say, if a cursor is in a nested inset, it will be
 319         // restore to the left of the top level inset.
 320         LastFilePosSection::FilePos fp;
 321         fp.pit = d->cursor_.bottom().pit();
 322         fp.pos = d->cursor_.bottom().pos();
 323         theSession().lastFilePos().save(buffer_.fileName(), fp);
 324
 325         if (d->last_inset_)
 326                 d->last_inset_->setMouseHover(this, false);
 327
 328         delete d;
 329 }
 330
 331
 332 int BufferView::rightMargin() const
 333 {
 334         // The additional test for the case the outliner is opened.
 335         if (!full_screen_ ||
 336                 !lyxrc.full_screen_limit ||
 337                 width_ < lyxrc.full_screen_width + 20)
 338                         return 10;
 339
 340         return (width_ - lyxrc.full_screen_width) / 2;
 341 }
 342
 343
 344 int BufferView::leftMargin() const
 345 {
 346         return rightMargin();
 347 }
 348
 349
 350 bool BufferView::isTopScreen() const
 351 {
 352         return d->scrollbarParameters_.position == d->scrollbarParameters_.min;
 353 }
 354
 355
 356 bool BufferView::isBottomScreen() const
 357 {
 358         return d->scrollbarParameters_.position == d->scrollbarParameters_.max;
 359 }
 360
 361
 362 Intl & BufferView::getIntl()
 363 {
 364         return d->intl_;
 365 }
 366
 367
 368 Intl const & BufferView::getIntl() const
 369 {
 370         return d->intl_;
 371 }
 372
 373
 374 CoordCache & BufferView::coordCache()
 375 {
 376         return d->coord_cache_;
 377 }
 378
 379
 380 CoordCache const & BufferView::coordCache() const
 381 {
 382         return d->coord_cache_;
 383 }
 384
 385
 386 Buffer & BufferView::buffer()
 387 {
 388         return buffer_;
 389 }
 390
 391
 392 Buffer const & BufferView::buffer() const
 393 {
 394         return buffer_;
 395 }
 396
 397
 398 bool BufferView::fitCursor()
 399 {
 400         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
 401                 frontend::FontMetrics const & fm =
 402                         theFontMetrics(d->cursor_.getFont().fontInfo());
 403                 int const asc = fm.maxAscent();
 404                 int const des = fm.maxDescent();
 405                 Point const p = getPos(d->cursor_);
 406                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 407                         return false;
 408         }
 409         return true;
 410 }
 411
 412
 413 void BufferView::processUpdateFlags(Update::flags flags)
 414 {
 415         // This is close to a hot-path.
 416         LYXERR(Debug::DEBUG, "BufferView::processUpdateFlags()"
 417                 << "[fitcursor = " << (flags & Update::FitCursor)
 418                 << ", forceupdate = " << (flags & Update::Force)
 419                 << ", singlepar = " << (flags & Update::SinglePar)
 420                 << "]  buffer: " << &buffer_);
 421
 422         // FIXME Does this really need doing here? It's done in updateBuffer, and
 423         // if the Buffer doesn't need updating, then do the macros?
 424         buffer_.updateMacros();
 425
 426         // Now do the first drawing step if needed. This consists on updating
 427         // the CoordCache in updateMetrics().
 428         // The second drawing step is done in WorkArea::redraw() if needed.
 429
 430         // Case when no explicit update is requested.
 431         if (!flags) {
 432                 // no need to redraw anything.
 433                 d->update_strategy_ = NoScreenUpdate;
 434                 return;
 435         }
 436
 437         if (flags == Update::Decoration) {
 438                 d->update_strategy_ = DecorationUpdate;
 439                 buffer_.changed(false);
 440                 return;
 441         }
 442
 443         if (flags == Update::FitCursor
 444                 || flags == (Update::Decoration | Update::FitCursor)) {
 445                 // tell the frontend to update the screen if needed.
 446                 if (fitCursor()) {
 447                         showCursor();
 448                         return;
 449                 }
 450                 if (flags & Update::Decoration) {
 451                         d->update_strategy_ = DecorationUpdate;
 452                         buffer_.changed(false);
 453                         return;
 454                 }
 455                 // no screen update is needed.
 456                 d->update_strategy_ = NoScreenUpdate;
 457                 return;
 458         }
 459
 460         bool const full_metrics = flags & Update::Force || !singleParUpdate();
 461
 462         if (full_metrics)
 463                 // We have to update the full screen metrics.
 464                 updateMetrics();
 465
 466         if (!(flags & Update::FitCursor)) {
 467                 // Nothing to do anymore. Trigger a redraw and return
 468                 buffer_.changed(false);
 469                 return;
 470         }
 471
 472         // updateMetrics() does not update paragraph position
 473         // This is done at draw() time. So we need a redraw!
 474         buffer_.changed(false);
 475
 476         if (fitCursor()) {
 477                 // The cursor is off screen so ensure it is visible.
 478                 // refresh it:
 479                 showCursor();
 480         }
 481
 482         updateHoveredInset();
 483 }
 484
 485
 486 void BufferView::updateScrollbar()
 487 {
 488         if (height_ == 0 && width_ == 0)
 489                 return;
 490
 491         // We prefer fixed size line scrolling.
 492         d->scrollbarParameters_.single_step = defaultRowHeight();
 493         // We prefer full screen page scrolling.
 494         d->scrollbarParameters_.page_step = height_;
 495
 496         Text & t = buffer_.text();
 497         TextMetrics & tm = d->text_metrics_[&t];
 498
 499         LYXERR(Debug::GUI, " Updating scrollbar: height: "
 500                 << t.paragraphs().size()
 501                 << " curr par: " << d->cursor_.bottom().pit()
 502                 << " default height " << defaultRowHeight());
 503
 504         size_t const parsize = t.paragraphs().size();
 505         if (d->par_height_.size() != parsize) {
 506                 d->par_height_.clear();
 507                 // FIXME: We assume a default paragraph height of 2 rows. This
 508                 // should probably be pondered with the screen width.
 509                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
 510         }
 511
 512         // Look at paragraph heights on-screen
 513         pair<pit_type, ParagraphMetrics const *> first = tm.first();
 514         pair<pit_type, ParagraphMetrics const *> last = tm.last();
 515         for (pit_type pit = first.first; pit <= last.first; ++pit) {
 516                 d->par_height_[pit] = tm.parMetrics(pit).height();
 517                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
 518                         << d->par_height_[pit]);
 519         }
 520
 521         int top_pos = first.second->position() - first.second->ascent();
 522         int bottom_pos = last.second->position() + last.second->descent();
 523         bool first_visible = first.first == 0 && top_pos >= 0;
 524         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
 525         if (first_visible && last_visible) {
 526                 d->scrollbarParameters_.min = 0;
 527                 d->scrollbarParameters_.max = 0;
 528                 return;
 529         }
 530
 531         d->scrollbarParameters_.min = top_pos;
 532         for (size_t i = 0; i != size_t(first.first); ++i)
 533                 d->scrollbarParameters_.min -= d->par_height_[i];
 534         d->scrollbarParameters_.max = bottom_pos;
 535         for (size_t i = last.first + 1; i != parsize; ++i)
 536                 d->scrollbarParameters_.max += d->par_height_[i];
 537
 538         d->scrollbarParameters_.position = 0;
 539         // The reference is the top position so we remove one page.
 540         if (lyxrc.scroll_below_document)
 541                 d->scrollbarParameters_.max -= minVisiblePart();
 542         else
 543                 d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 544 }
 545
 546
 547 ScrollbarParameters const & BufferView::scrollbarParameters() const
 548 {
 549         return d->scrollbarParameters_;
 550 }
 551
 552
 553 docstring BufferView::toolTip(int x, int y) const
 554 {
 555         // Get inset under mouse, if there is one.
 556         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 557         if (!covering_inset)
 558                 // No inset, no tooltip...
 559                 return docstring();
 560         return covering_inset->toolTip(*this, x, y);
 561 }
 562
 563
 564 string BufferView::contextMenu(int x, int y) const
 565 {
 566         //If there is a selection, return the containing inset menu
 567         if (d->cursor_.selection())
 568                 return d->cursor_.inset().contextMenu(*this, x, y);
 569
 570         // Get inset under mouse, if there is one.
 571         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 572         if (covering_inset)
 573                 return covering_inset->contextMenu(*this, x, y);
 574
 575         return buffer_.inset().contextMenu(*this, x, y);
 576 }
 577
 578
 579 void BufferView::scrollDocView(int value, bool update)
 580 {
 581         int const offset = value - d->scrollbarParameters_.position;
 582
 583         // No scrolling at all? No need to redraw anything
 584         if (offset == 0)
 585                 return;
 586
 587         // If the offset is less than 2 screen height, prefer to scroll instead.
 588         if (abs(offset) <= 2 * height_) {
 589                 d->anchor_ypos_ -= offset;
 590                 buffer_.changed(true);
 591                 updateHoveredInset();
 592                 return;
 593         }
 594
 595         // cut off at the top
 596         if (value <= d->scrollbarParameters_.min) {
 597                 DocIterator dit = doc_iterator_begin(&buffer_);
 598                 showCursor(dit, false, update);
 599                 LYXERR(Debug::SCROLLING, "scroll to top");
 600                 return;
 601         }
 602
 603         // cut off at the bottom
 604         if (value >= d->scrollbarParameters_.max) {
 605                 DocIterator dit = doc_iterator_end(&buffer_);
 606                 dit.backwardPos();
 607                 showCursor(dit, false, update);
 608                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 609                 return;
 610         }
 611
 612         // find paragraph at target position
 613         int par_pos = d->scrollbarParameters_.min;
 614         pit_type i = 0;
 615         for (; i != int(d->par_height_.size()); ++i) {
 616                 par_pos += d->par_height_[i];
 617                 if (par_pos >= value)
 618                         break;
 619         }
 620
 621         if (par_pos < value) {
 622                 // It seems we didn't find the correct pit so stay on the safe side and
 623                 // scroll to bottom.
 624                 LYXERR0("scrolling position not found!");
 625                 scrollDocView(d->scrollbarParameters_.max, update);
 626                 return;
 627         }
 628
 629         DocIterator dit = doc_iterator_begin(&buffer_);
 630         dit.pit() = i;
 631         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 632         showCursor(dit, false, update);
 633 }
 634
 635
 636 // FIXME: this method is not working well.
 637 void BufferView::setCursorFromScrollbar()
 638 {
 639         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 640
 641         int const height = 2 * defaultRowHeight();
 642         int const first = height;
 643         int const last = height_ - height;
 644         int newy = 0;
 645         Cursor const & oldcur = d->cursor_;
 646
 647         switch (cursorStatus(oldcur)) {
 648         case CUR_ABOVE:
 649                 newy = first;
 650                 break;
 651         case CUR_BELOW:
 652                 newy = last;
 653                 break;
 654         case CUR_INSIDE:
 655                 int const y = getPos(oldcur).y_;
 656                 newy = min(last, max(y, first));
 657                 if (y == newy)
 658                         return;
 659         }
 660         // We reset the cursor because cursorStatus() does not
 661         // work when the cursor is within mathed.
 662         Cursor cur(*this);
 663         cur.reset();
 664         tm.setCursorFromCoordinates(cur, 0, newy);
 665
 666         // update the bufferview cursor and notify insets
 667         // FIXME: Care about the d->cursor_ flags to redraw if needed
 668         Cursor old = d->cursor_;
 669         mouseSetCursor(cur);
 670         // the DEPM call in mouseSetCursor() might have destroyed the
 671         // paragraph the cursor is in.
 672         bool badcursor = old.fixIfBroken();
 673         badcursor |= notifyCursorLeavesOrEnters(old, d->cursor_);
 674         if (badcursor)
 675                 d->cursor_.fixIfBroken();
 676 }
 677
 678
 679 Change const BufferView::getCurrentChange() const
 680 {
 681         if (!d->cursor_.selection())
 682                 return Change(Change::UNCHANGED);
 683
 684         DocIterator dit = d->cursor_.selectionBegin();
 685         return dit.paragraph().lookupChange(dit.pos());
 686 }
 687
 688
 689 // this could be used elsewhere as well?
 690 // FIXME: This does not work within mathed!
 691 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 692 {
 693         Point const p = getPos(dit);
 694         if (p.y_ < 0)
 695                 return CUR_ABOVE;
 696         if (p.y_ > workHeight())
 697                 return CUR_BELOW;
 698         return CUR_INSIDE;
 699 }
 700
 701
 702 void BufferView::bookmarkEditPosition()
 703 {
 704         // Don't eat cpu time for each keystroke
 705         if (d->cursor_.paragraph().id() == d->bookmark_edit_position_)
 706                 return;
 707         saveBookmark(0);
 708         d->bookmark_edit_position_ = d->cursor_.paragraph().id();
 709 }
 710
 711
 712 void BufferView::saveBookmark(unsigned int idx)
 713 {
 714         // tentatively save bookmark, id and pos will be used to
 715         // acturately locate a bookmark in a 'live' lyx session.
 716         // pit and pos will be updated with bottom level pit/pos
 717         // when lyx exits.
 718         if (!buffer_.isInternal()) {
 719                 theSession().bookmarks().save(
 720                         buffer_.fileName(),
 721                         d->cursor_.bottom().pit(),
 722                         d->cursor_.bottom().pos(),
 723                         d->cursor_.paragraph().id(),
 724                         d->cursor_.pos(),
 725                         idx
 726                         );
 727                 if (idx)
 728                         // emit message signal.
 729                         message(_("Save bookmark"));
 730         }
 731 }
 732
 733
 734 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 735         int top_id, pos_type top_pos)
 736 {
 737         bool success = false;
 738         DocIterator dit;
 739
 740         d->cursor_.clearSelection();
 741
 742         // if a valid par_id is given, try it first
 743         // This is the case for a 'live' bookmark when unique paragraph ID
 744         // is used to track bookmarks.
 745         if (top_id > 0) {
 746                 dit = buffer_.getParFromID(top_id);
 747                 if (!dit.atEnd()) {
 748                         dit.pos() = min(dit.paragraph().size(), top_pos);
 749                         // Some slices of the iterator may not be
 750                         // reachable (e.g. closed collapsable inset)
 751                         // so the dociterator may need to be
 752                         // shortened. Otherwise, setCursor may crash
 753                         // lyx when the cursor can not be set to these
 754                         // insets.
 755                         size_t const n = dit.depth();
 756                         for (size_t i = 0; i < n; ++i)
 757                                 if (!dit[i].inset().editable()) {
 758                                         dit.resize(i);
 759                                         break;
 760                                 }
 761                         success = true;
 762                 }
 763         }
 764
 765         // if top_id == 0, or searching through top_id failed
 766         // This is the case for a 'restored' bookmark when only bottom
 767         // (document level) pit was saved. Because of this, bookmark
 768         // restoration is inaccurate. If a bookmark was within an inset,
 769         // it will be restored to the left of the outmost inset that contains
 770         // the bookmark.
 771         if (bottom_pit < int(buffer_.paragraphs().size())) {
 772                 dit = doc_iterator_begin(&buffer_);
 773
 774                 dit.pit() = bottom_pit;
 775                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 776                 success = true;
 777         }
 778
 779         if (success) {
 780                 // Note: only bottom (document) level pit is set.
 781                 setCursor(dit);
 782                 // set the current font.
 783                 d->cursor_.setCurrentFont();
 784                 // To center the screen on this new position we need the
 785                 // paragraph position which is computed at draw() time.
 786                 // So we need a redraw!
 787                 buffer_.changed(false);
 788                 if (fitCursor())
 789                         showCursor();
 790         }
 791
 792         return success;
 793 }
 794
 795
 796 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 797 {
 798         if (lyxrc.rtl_support) {
 799                 if (d->cursor_.real_current_font.isRightToLeft()) {
 800                         if (d->intl_.keymap == Intl::PRIMARY)
 801                                 d->intl_.keyMapSec();
 802                 } else {
 803                         if (d->intl_.keymap == Intl::SECONDARY)
 804                                 d->intl_.keyMapPrim();
 805                 }
 806         }
 807
 808         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 809 }
 810
 811
 812 int BufferView::workWidth() const
 813 {
 814         return width_;
 815 }
 816
 817
 818 void BufferView::recenter()
 819 {
 820         showCursor(d->cursor_, true, true);
 821 }
 822
 823
 824 void BufferView::showCursor()
 825 {
 826         showCursor(d->cursor_, false, true);
 827 }
 828
 829
 830 void BufferView::showCursor(DocIterator const & dit,
 831         bool recenter, bool update)
 832 {
 833         if (scrollToCursor(dit, recenter) && update) {
 834                 buffer_.changed(true);
 835                 updateHoveredInset();
 836         }
 837 }
 838
 839
 840 void BufferView::scrollToCursor()
 841 {
 842         if (scrollToCursor(d->cursor_, false)) {
 843                 buffer_.changed(true);
 844                 updateHoveredInset();
 845         }
 846 }
 847
 848
 849 bool BufferView::scrollToCursor(DocIterator const & dit, bool recenter)
 850 {
 851         // We are not properly started yet, delay until resizing is
 852         // done.
 853         if (height_ == 0)
 854                 return false;
 855
 856         LYXERR(Debug::SCROLLING, "recentering!");
 857
 858         CursorSlice const & bot = dit.bottom();
 859         TextMetrics & tm = d->text_metrics_[bot.text()];
 860
 861         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 862         int bot_pit = bot.pit();
 863         if (bot_pit > max_pit) {
 864                 // FIXME: Why does this happen?
 865                 LYXERR0("bottom pit is greater that max pit: "
 866                         << bot_pit << " > " << max_pit);
 867                 bot_pit = max_pit;
 868         }
 869
 870         if (bot_pit == tm.first().first - 1)
 871                 tm.newParMetricsUp();
 872         else if (bot_pit == tm.last().first + 1)
 873                 tm.newParMetricsDown();
 874
 875         if (tm.contains(bot_pit)) {
 876                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 877                 LASSERT(!pm.rows().empty(), /**/);
 878                 // FIXME: smooth scrolling doesn't work in mathed.
 879                 CursorSlice const & cs = dit.innerTextSlice();
 880                 int offset = coordOffset(dit).y_;
 881                 int ypos = pm.position() + offset;
 882                 Dimension const & row_dim =
 883                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 884                 int scrolled = 0;
 885                 if (recenter)
 886                         scrolled = scroll(ypos - height_/2);
 887
 888                 // We try to visualize the whole row, if the row height is larger than
 889                 // the screen height, we scroll to a heuristic value of height_ / 4.
 890                 // FIXME: This heuristic value should be replaced by a recursive search
 891                 // for a row in the inset that can be visualized completely.
 892                 else if (row_dim.height() > height_) {
 893                         if (ypos < defaultRowHeight())
 894                                 scrolled = scroll(ypos - height_ / 4);
 895                         else if (ypos > height_ - defaultRowHeight())
 896                                 scrolled = scroll(ypos - 3 * height_ / 4);
 897                 }
 898
 899                 // If the top part of the row falls of the screen, we scroll
 900                 // up to align the top of the row with the top of the screen.
 901                 else if (ypos - row_dim.ascent() < 0 && ypos < height_) {
 902                         int ynew = row_dim.ascent();
 903                         scrolled = scrollUp(ynew - ypos);
 904                 }
 905
 906                 // If the bottom of the row falls of the screen, we scroll down.
 907                 else if (ypos + row_dim.descent() > height_ && ypos > 0) {
 908                         int ynew = height_ - row_dim.descent();
 909                         scrolled = scrollDown(ypos - ynew);
 910                 }
 911
 912                 // else, nothing to do, the cursor is already visible so we just return.
 913                 return scrolled != 0;
 914         }
 915
 916         // fix inline completion position
 917         if (d->inlineCompletionPos_.fixIfBroken())
 918                 d->inlineCompletionPos_ = DocIterator();
 919
 920         tm.redoParagraph(bot_pit);
 921         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 922         int offset = coordOffset(dit).y_;
 923
 924         d->anchor_pit_ = bot_pit;
 925         CursorSlice const & cs = dit.innerTextSlice();
 926         Dimension const & row_dim =
 927                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 928
 929         if (recenter)
 930                 d->anchor_ypos_ = height_/2;
 931         else if (d->anchor_pit_ == 0)
 932                 d->anchor_ypos_ = offset + pm.ascent();
 933         else if (d->anchor_pit_ == max_pit)
 934                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
 935         else if (offset > height_)
 936                 d->anchor_ypos_ = height_ - offset - defaultRowHeight();
 937         else
 938                 d->anchor_ypos_ = defaultRowHeight() * 2;
 939
 940         return true;
 941 }
 942
 943
 944 void BufferView::updateDocumentClass(DocumentClass const * const olddc)
 945 {
 946         message(_("Converting document to new document class..."));
 947
 948         StableDocIterator backcur(d->cursor_);
 949         ErrorList & el = buffer_.errorList("Class Switch");
 950         cap::switchBetweenClasses(
 951                         olddc, buffer_.params().documentClassPtr(),
 952                         static_cast<InsetText &>(buffer_.inset()), el);
 953
 954         setCursor(backcur.asDocIterator(&buffer_));
 955
 956         buffer_.errors("Class Switch");
 957 }
 958
 959 /** Return the change status at cursor position, taking in account the
 960  * status at each level of the document iterator (a table in a deleted
 961  * footnote is deleted).
 962  * When \param outer is true, the top slice is not looked at.
 963  */
 964 static Change::Type lookupChangeType(DocIterator const & dit, bool outer = false)
 965 {
 966         size_t const depth = dit.depth() - (outer ? 1 : 0);
 967
 968         for (size_t i = 0 ; i < depth ; ++i) {
 969                 CursorSlice const & slice = dit[i];
 970                 if (!slice.inset().inMathed()
 971                     && slice.pos() < slice.paragraph().size()) {
 972                         Change::Type const ch = slice.paragraph().lookupChange(slice.pos()).type;
 973                         if (ch != Change::UNCHANGED)
 974                                 return ch;
 975                 }
 976         }
 977         return Change::UNCHANGED;
 978 }
 979
 980
 981 bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
 982 {
 983         FuncCode const act = cmd.action();
 984
 985         // Can we use a readonly buffer?
 986         if (buffer_.isReadonly()
 987             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
 988             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
 989                 flag.message(from_utf8(N_("Document is read-only")));
 990                 flag.setEnabled(false);
 991                 return true;
 992         }
 993
 994         // Are we in a DELETED change-tracking region?
 995         if (lookupChangeType(d->cursor_, true) == Change::DELETED
 996             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
 997             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
 998                 flag.message(from_utf8(N_("This portion of the document is deleted.")));
 999                 flag.setEnabled(false);
1000                 return true;
1001         }
1002
1003         Cursor & cur = d->cursor_;
1004
1005         if (cur.getStatus(cmd, flag))
1006                 return true;
1007
1008         switch (act) {
1009
1010         // FIXME: This is a bit problematic because we don't check if this is
1011         // a document BufferView or not for these LFUNs. We probably have to
1012         // dispatch both to currentBufferView() and, if that fails,
1013         // to documentBufferView(); same as we do now for current Buffer and
1014         // document Buffer. Ideally those LFUN should go to Buffer as they
1015         // operate on the full Buffer and the cursor is only needed either for
1016         // an Undo record or to restore a cursor position. But we don't know
1017         // how to do that inside Buffer of course.
1018         case LFUN_BUFFER_PARAMS_APPLY:
1019         case LFUN_LAYOUT_MODULES_CLEAR:
1020         case LFUN_LAYOUT_MODULE_ADD:
1021         case LFUN_LAYOUT_RELOAD:
1022         case LFUN_TEXTCLASS_APPLY:
1023         case LFUN_TEXTCLASS_LOAD:
1024                 flag.setEnabled(!buffer_.isReadonly());
1025                 break;
1026
1027         case LFUN_UNDO:
1028                 // We do not use the LyXAction flag for readonly because Undo sets the
1029                 // buffer clean/dirty status by itself.
1030                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasUndoStack());
1031                 break;
1032         case LFUN_REDO:
1033                 // We do not use the LyXAction flag for readonly because Redo sets the
1034                 // buffer clean/dirty status by itself.
1035                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasRedoStack());
1036                 break;
1037         case LFUN_FILE_INSERT:
1038         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
1039         case LFUN_FILE_INSERT_PLAINTEXT:
1040         case LFUN_BOOKMARK_SAVE:
1041                 // FIXME: Actually, these LFUNS should be moved to Text
1042                 flag.setEnabled(cur.inTexted());
1043                 break;
1044
1045         case LFUN_FONT_STATE:
1046         case LFUN_LABEL_INSERT:
1047         case LFUN_INFO_INSERT:
1048         case LFUN_PARAGRAPH_GOTO:
1049         case LFUN_NOTE_NEXT:
1050         case LFUN_REFERENCE_NEXT:
1051         case LFUN_WORD_FIND:
1052         case LFUN_WORD_FIND_FORWARD:
1053         case LFUN_WORD_FIND_BACKWARD:
1054         case LFUN_WORD_FINDADV:
1055         case LFUN_WORD_REPLACE:
1056         case LFUN_MARK_OFF:
1057         case LFUN_MARK_ON:
1058         case LFUN_MARK_TOGGLE:
1059         case LFUN_SCREEN_RECENTER:
1060         case LFUN_SCREEN_SHOW_CURSOR:
1061         case LFUN_BIBTEX_DATABASE_ADD:
1062         case LFUN_BIBTEX_DATABASE_DEL:
1063         case LFUN_STATISTICS:
1064         case LFUN_BRANCH_ADD_INSERT:
1065         case LFUN_KEYMAP_OFF:
1066         case LFUN_KEYMAP_PRIMARY:
1067         case LFUN_KEYMAP_SECONDARY:
1068         case LFUN_KEYMAP_TOGGLE:
1069                 flag.setEnabled(true);
1070                 break;
1071
1072         case LFUN_LABEL_GOTO: {
1073                 flag.setEnabled(!cmd.argument().empty()
1074                     || getInsetByCode<InsetRef>(cur, REF_CODE));
1075                 break;
1076         }
1077
1078         case LFUN_CHANGES_TRACK:
1079                 flag.setEnabled(true);
1080                 flag.setOnOff(buffer_.params().trackChanges);
1081                 break;
1082
1083         case LFUN_CHANGES_OUTPUT:
1084                 flag.setEnabled(true);
1085                 flag.setOnOff(buffer_.params().outputChanges);
1086                 break;
1087
1088         case LFUN_CHANGES_MERGE:
1089         case LFUN_CHANGE_NEXT:
1090         case LFUN_CHANGE_PREVIOUS:
1091         case LFUN_ALL_CHANGES_ACCEPT:
1092         case LFUN_ALL_CHANGES_REJECT:
1093                 // TODO: context-sensitive enabling of LFUNs
1094                 // In principle, these command should only be enabled if there
1095                 // is a change in the document. However, without proper
1096                 // optimizations, this will inevitably result in poor performance.
1097                 flag.setEnabled(true);
1098                 break;
1099
1100         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
1101                 flag.setOnOff(buffer_.params().compressed);
1102                 break;
1103         }
1104
1105         case LFUN_BUFFER_TOGGLE_OUTPUT_SYNC: {
1106                 flag.setOnOff(buffer_.params().output_sync);
1107                 break;
1108         }
1109
1110         case LFUN_SCREEN_UP:
1111         case LFUN_SCREEN_DOWN:
1112         case LFUN_SCROLL:
1113         case LFUN_SCREEN_UP_SELECT:
1114         case LFUN_SCREEN_DOWN_SELECT:
1115         case LFUN_INSET_FORALL:
1116                 flag.setEnabled(true);
1117                 break;
1118
1119         case LFUN_LAYOUT_TABULAR:
1120                 flag.setEnabled(cur.innerInsetOfType(TABULAR_CODE));
1121                 break;
1122
1123         case LFUN_LAYOUT:
1124                 flag.setEnabled(!cur.inset().forcePlainLayout(cur.idx()));
1125                 break;
1126
1127         case LFUN_LAYOUT_PARAGRAPH:
1128                 flag.setEnabled(cur.inset().allowParagraphCustomization(cur.idx()));
1129                 break;
1130
1131         case LFUN_DIALOG_SHOW_NEW_INSET:
1132                 // FIXME: this is wrong, but I do not understand the
1133                 // intent (JMarc)
1134                 if (cur.inset().lyxCode() == CAPTION_CODE)
1135                         return cur.inset().getStatus(cur, cmd, flag);
1136                 // FIXME we should consider passthru paragraphs too.
1137                 flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
1138                 break;
1139
1140         case LFUN_CITATION_INSERT: {
1141                 FuncRequest fr(LFUN_INSET_INSERT, "citation");
1142                 // FIXME: This could turn in a recursive hell.
1143                 // Shouldn't we use Buffer::getStatus() instead?
1144                 flag.setEnabled(lyx::getStatus(fr).enabled());
1145                 break;
1146         }
1147         case LFUN_INSET_APPLY: {
1148                 string const name = cmd.getArg(0);
1149                 Inset * inset = editedInset(name);
1150                 if (inset) {
1151                         FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1152                         if (!inset->getStatus(cur, fr, flag)) {
1153                                 // Every inset is supposed to handle this
1154                                 LASSERT(false, break);
1155                         }
1156                 } else {
1157                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1158                         flag = lyx::getStatus(fr);
1159                 }
1160                 break;
1161         }
1162
1163         // FIXME We do not really want this here, but at present we need to
1164         // handle their dispatch here, for reasons explained there, so we'll
1165         // handle this here, too, for consistency.
1166         case LFUN_BRANCH_ACTIVATE:
1167         case LFUN_BRANCH_DEACTIVATE: {
1168                 BranchList const & branchList = buffer().params().branchlist();
1169                 docstring const branchName = cmd.argument();
1170                 flag.setEnabled(!branchName.empty() && branchList.find(branchName));
1171                 break;
1172         }
1173
1174         default:
1175                 return false;
1176         }
1177
1178         return true;
1179 }
1180
1181
1182 Inset * BufferView::editedInset(string const & name) const
1183 {
1184         map<string, Inset *>::const_iterator it = d->edited_insets_.find(name);
1185         return it == d->edited_insets_.end() ? 0 : it->second;
1186 }
1187
1188
1189 void BufferView::editInset(string const & name, Inset * inset)
1190 {
1191         d->edited_insets_[name] = inset;
1192 }
1193
1194
1195 void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
1196 {
1197         //lyxerr << [ cmd = " << cmd << "]" << endl;
1198
1199         // Make sure that the cached BufferView is correct.
1200         LYXERR(Debug::ACTION, " action[" << cmd.action() << ']'
1201                 << " arg[" << to_utf8(cmd.argument()) << ']'
1202                 << " x[" << cmd.x() << ']'
1203                 << " y[" << cmd.y() << ']'
1204                 << " button[" << cmd.button() << ']');
1205
1206         string const argument = to_utf8(cmd.argument());
1207         Cursor & cur = d->cursor_;
1208
1209         // Don't dispatch function that does not apply to internal buffers.
1210         if (buffer_.isInternal()
1211             && lyxaction.funcHasFlag(cmd.action(), LyXAction::NoInternal))
1212                 return;
1213
1214         // We'll set this back to false if need be.
1215         bool dispatched = true;
1216         buffer_.undo().beginUndoGroup();
1217
1218         FuncCode const act = cmd.action();
1219         switch (act) {
1220
1221         case LFUN_BUFFER_PARAMS_APPLY: {
1222                 DocumentClass const * const oldClass = buffer_.params().documentClassPtr();
1223                 cur.recordUndoFullDocument();
1224                 istringstream ss(to_utf8(cmd.argument()));
1225                 Lexer lex;
1226                 lex.setStream(ss);
1227                 int const unknown_tokens = buffer_.readHeader(lex);
1228                 if (unknown_tokens != 0) {
1229                         LYXERR0("Warning in LFUN_BUFFER_PARAMS_APPLY!\n"
1230                                                 << unknown_tokens << " unknown token"
1231                                                 << (unknown_tokens == 1 ? "" : "s"));
1232                 }
1233                 updateDocumentClass(oldClass);
1234
1235                 // We are most certainly here because of a change in the document
1236                 // It is then better to make sure that all dialogs are in sync with
1237                 // current document settings.
1238                 dr.screenUpdate(Update::Force | Update::FitCursor);
1239                 dr.forceBufferUpdate();
1240                 break;
1241         }
1242
1243         case LFUN_LAYOUT_MODULES_CLEAR: {
1244                 DocumentClass const * const oldClass =
1245                         buffer_.params().documentClassPtr();
1246                 cur.recordUndoFullDocument();
1247                 buffer_.params().clearLayoutModules();
1248                 buffer_.params().makeDocumentClass();
1249                 updateDocumentClass(oldClass);
1250                 dr.screenUpdate(Update::Force);
1251                 dr.forceBufferUpdate();
1252                 break;
1253         }
1254
1255         case LFUN_LAYOUT_MODULE_ADD: {
1256                 BufferParams const & params = buffer_.params();
1257                 if (!params.moduleCanBeAdded(argument)) {
1258                         LYXERR0("Module `" << argument <<
1259                                 "' cannot be added due to failed requirements or "
1260                                 "conflicts with installed modules.");
1261                         break;
1262                 }
1263                 DocumentClass const * const oldClass = params.documentClassPtr();
1264                 cur.recordUndoFullDocument();
1265                 buffer_.params().addLayoutModule(argument);
1266                 buffer_.params().makeDocumentClass();
1267                 updateDocumentClass(oldClass);
1268                 dr.screenUpdate(Update::Force);
1269                 dr.forceBufferUpdate();
1270                 break;
1271         }
1272
1273         case LFUN_TEXTCLASS_APPLY: {
1274                 // since this shortcircuits, the second call is made only if
1275                 // the first fails
1276                 bool const success =
1277                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1278                         LayoutFileList::get().load(argument, buffer_.filePath());
1279                 if (!success) {
1280                         docstring s = bformat(_("The document class `%1$s' "
1281                                                  "could not be loaded."), from_utf8(argument));
1282                         frontend::Alert::error(_("Could not load class"), s);
1283                         break;
1284                 }
1285
1286                 LayoutFile const * old_layout = buffer_.params().baseClass();
1287                 LayoutFile const * new_layout = &(LayoutFileList::get()[argument]);
1288
1289                 if (old_layout == new_layout)
1290                         // nothing to do
1291                         break;
1292
1293                 // Save the old, possibly modular, layout for use in conversion.
1294                 DocumentClass const * const oldDocClass =
1295                         buffer_.params().documentClassPtr();
1296                 cur.recordUndoFullDocument();
1297                 buffer_.params().setBaseClass(argument);
1298                 buffer_.params().makeDocumentClass();
1299                 updateDocumentClass(oldDocClass);
1300                 dr.screenUpdate(Update::Force);
1301                 dr.forceBufferUpdate();
1302                 break;
1303         }
1304
1305         case LFUN_TEXTCLASS_LOAD: {
1306                 // since this shortcircuits, the second call is made only if
1307                 // the first fails
1308                 bool const success =
1309                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1310                         LayoutFileList::get().load(argument, buffer_.filePath());
1311                 if (!success) {
1312                         docstring s = bformat(_("The document class `%1$s' "
1313                                                  "could not be loaded."), from_utf8(argument));
1314                         frontend::Alert::error(_("Could not load class"), s);
1315                 }
1316                 break;
1317         }
1318
1319         case LFUN_LAYOUT_RELOAD: {
1320                 DocumentClass const * const oldClass = buffer_.params().documentClassPtr();
1321                 LayoutFileIndex bc = buffer_.params().baseClassID();
1322                 LayoutFileList::get().reset(bc);
1323                 buffer_.params().setBaseClass(bc);
1324                 buffer_.params().makeDocumentClass();
1325                 updateDocumentClass(oldClass);
1326                 dr.screenUpdate(Update::Force);
1327                 dr.forceBufferUpdate();
1328                 break;
1329         }
1330
1331         case LFUN_UNDO:
1332                 dr.setMessage(_("Undo"));
1333                 cur.clearSelection();
1334                 if (!cur.textUndo())
1335                         dr.setMessage(_("No further undo information"));
1336                 else
1337                         dr.screenUpdate(Update::Force | Update::FitCursor);
1338                 dr.forceBufferUpdate();
1339                 break;
1340
1341         case LFUN_REDO:
1342                 dr.setMessage(_("Redo"));
1343                 cur.clearSelection();
1344                 if (!cur.textRedo())
1345                         dr.setMessage(_("No further redo information"));
1346                 else
1347                         dr.screenUpdate(Update::Force | Update::FitCursor);
1348                 dr.forceBufferUpdate();
1349                 break;
1350
1351         case LFUN_FONT_STATE:
1352                 dr.setMessage(cur.currentState());
1353                 break;
1354
1355         case LFUN_BOOKMARK_SAVE:
1356                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1357                 break;
1358
1359         case LFUN_LABEL_GOTO: {
1360                 docstring label = cmd.argument();
1361                 if (label.empty()) {
1362                         InsetRef * inset =
1363                                 getInsetByCode<InsetRef>(cur, REF_CODE);
1364                         if (inset) {
1365                                 label = inset->getParam("reference");
1366                                 // persistent=false: use temp_bookmark
1367                                 saveBookmark(0);
1368                         }
1369                 }
1370                 if (!label.empty()) {
1371                         gotoLabel(label);
1372                         // at the moment, this is redundant, since gotoLabel will
1373                         // eventually call LFUN_PARAGRAPH_GOTO, but it seems best
1374                         // to have it here.
1375                         dr.screenUpdate(Update::Force | Update::FitCursor);
1376                 }
1377                 break;
1378         }
1379
1380         case LFUN_PARAGRAPH_GOTO: {
1381                 int const id = convert<int>(cmd.getArg(0));
1382                 int const pos = convert<int>(cmd.getArg(1));
1383                 int i = 0;
1384                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1385                         b = theBufferList().next(b)) {
1386
1387                         DocIterator dit = b->getParFromID(id);
1388                         if (dit.atEnd()) {
1389                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1390                                 ++i;
1391                                 continue;
1392                         }
1393                         LYXERR(Debug::INFO, "Paragraph " << dit.paragraph().id()
1394                                 << " found in buffer `"
1395                                 << b->absFileName() << "'.");
1396
1397                         if (b == &buffer_) {
1398                                 // Set the cursor
1399                                 dit.pos() = pos;
1400                                 setCursor(dit);
1401                                 dr.screenUpdate(Update::Force | Update::FitCursor);
1402                         } else {
1403                                 // Switch to other buffer view and resend cmd
1404                                 lyx::dispatch(FuncRequest(
1405                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1406                                 lyx::dispatch(cmd);
1407                         }
1408                         break;
1409                 }
1410                 break;
1411         }
1412
1413         case LFUN_NOTE_NEXT:
1414                 gotoInset(this, NOTE_CODE, false);
1415                 break;
1416
1417         case LFUN_REFERENCE_NEXT: {
1418                 vector<InsetCode> tmp;
1419                 tmp.push_back(LABEL_CODE);
1420                 tmp.push_back(REF_CODE);
1421                 gotoInset(this, tmp, true);
1422                 break;
1423         }
1424
1425         case LFUN_CHANGES_TRACK:
1426                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
1427                 break;
1428
1429         case LFUN_CHANGES_OUTPUT:
1430                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
1431                 if (buffer_.params().outputChanges) {
1432                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
1433                         bool xcolorulem = LaTeXFeatures::isAvailable("ulem") &&
1434                                           LaTeXFeatures::isAvailable("xcolor");
1435
1436                         if (!dvipost && !xcolorulem) {
1437                                 Alert::warning(_("Changes not shown in LaTeX output"),
1438                                                _("Changes will not be highlighted in LaTeX output, "
1439                                                  "because neither dvipost nor xcolor/ulem are installed.\n"
1440                                                  "Please install these packages or redefine "
1441                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1442                         } else if (!xcolorulem) {
1443                                 Alert::warning(_("Changes not shown in LaTeX output"),
1444                                                _("Changes will not be highlighted in LaTeX output "
1445                                                  "when using pdflatex, because xcolor and ulem are not installed.\n"
1446                                                  "Please install both packages or redefine "
1447                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1448                         }
1449                 }
1450                 break;
1451
1452         case LFUN_CHANGE_NEXT:
1453                 findNextChange(this);
1454                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1455                 dr.screenUpdate(Update::Force | Update::FitCursor);
1456                 break;
1457
1458         case LFUN_CHANGE_PREVIOUS:
1459                 findPreviousChange(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_CHANGES_MERGE:
1465                 if (findNextChange(this) || findPreviousChange(this)) {
1466                         dr.screenUpdate(Update::Force | Update::FitCursor);
1467                         dr.forceBufferUpdate();
1468                         showDialog("changes");
1469                 }
1470                 break;
1471
1472         case LFUN_ALL_CHANGES_ACCEPT:
1473                 // select complete document
1474                 cur.reset();
1475                 cur.selHandle(true);
1476                 buffer_.text().cursorBottom(cur);
1477                 // accept everything in a single step to support atomic undo
1478                 buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
1479                 cur.resetAnchor();
1480                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1481                 dr.screenUpdate(Update::Force | Update::FitCursor);
1482                 dr.forceBufferUpdate();
1483                 break;
1484
1485         case LFUN_ALL_CHANGES_REJECT:
1486                 // select complete document
1487                 cur.reset();
1488                 cur.selHandle(true);
1489                 buffer_.text().cursorBottom(cur);
1490                 // reject everything in a single step to support atomic undo
1491                 // Note: reject does not work recursively; the user may have to repeat the operation
1492                 buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
1493                 cur.resetAnchor();
1494                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1495                 dr.screenUpdate(Update::Force | Update::FitCursor);
1496                 dr.forceBufferUpdate();
1497                 break;
1498
1499         case LFUN_WORD_FIND_FORWARD:
1500         case LFUN_WORD_FIND_BACKWARD: {
1501                 static docstring last_search;
1502                 docstring searched_string;
1503
1504                 if (!cmd.argument().empty()) {
1505                         last_search = cmd.argument();
1506                         searched_string = cmd.argument();
1507                 } else {
1508                         searched_string = last_search;
1509                 }
1510
1511                 if (searched_string.empty())
1512                         break;
1513
1514                 bool const fw = act == LFUN_WORD_FIND_FORWARD;
1515                 docstring const data =
1516                         find2string(searched_string, true, false, fw);
1517                 bool found = lyxfind(this, FuncRequest(LFUN_WORD_FIND, data));
1518                 if (found)
1519                         dr.screenUpdate(Update::Force | Update::FitCursor);
1520                 break;
1521         }
1522
1523         case LFUN_WORD_FIND: {
1524                 FuncRequest req = cmd;
1525                 if (cmd.argument().empty() && !d->search_request_cache_.argument().empty())
1526                         req = d->search_request_cache_;
1527                 if (req.argument().empty()) {
1528                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
1529                         break;
1530                 }
1531                 if (lyxfind(this, req))
1532                         dr.screenUpdate(Update::Force | Update::FitCursor);
1533                 else
1534                         message(_("String not found!"));
1535                 d->search_request_cache_ = req;
1536                 break;
1537         }
1538
1539         case LFUN_WORD_REPLACE: {
1540                 bool has_deleted = false;
1541                 if (cur.selection()) {
1542                         DocIterator beg = cur.selectionBegin();
1543                         DocIterator end = cur.selectionEnd();
1544                         if (beg.pit() == end.pit()) {
1545                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1546                                         if (!cur.inMathed() && cur.paragraph().isDeleted(p)) {
1547                                                 has_deleted = true;
1548                                                 break;
1549                                         }
1550                                 }
1551                         }
1552                 }
1553                 if (lyxreplace(this, cmd, has_deleted)) {
1554                         dr.forceBufferUpdate();
1555                         dr.screenUpdate(Update::Force | Update::FitCursor);
1556                 }
1557                 break;
1558         }
1559
1560         case LFUN_WORD_FINDADV: {
1561                 FindAndReplaceOptions opt;
1562                 istringstream iss(to_utf8(cmd.argument()));
1563                 iss >> opt;
1564                 if (findAdv(this, opt)) {
1565                         dr.screenUpdate(Update::Force | Update::FitCursor);
1566                         cur.dispatched();
1567                         dispatched = true;
1568                 } else {
1569                         cur.undispatched();
1570                         dispatched = false;
1571                 }
1572                 break;
1573         }
1574
1575         case LFUN_MARK_OFF:
1576                 cur.clearSelection();
1577                 dr.setMessage(from_utf8(N_("Mark off")));
1578                 break;
1579
1580         case LFUN_MARK_ON:
1581                 cur.clearSelection();
1582                 cur.setMark(true);
1583                 dr.setMessage(from_utf8(N_("Mark on")));
1584                 break;
1585
1586         case LFUN_MARK_TOGGLE:
1587                 cur.setSelection(false);
1588                 if (cur.mark()) {
1589                         cur.setMark(false);
1590                         dr.setMessage(from_utf8(N_("Mark removed")));
1591                 } else {
1592                         cur.setMark(true);
1593                         dr.setMessage(from_utf8(N_("Mark set")));
1594                 }
1595                 cur.resetAnchor();
1596                 break;
1597
1598         case LFUN_SCREEN_SHOW_CURSOR:
1599                 showCursor();
1600                 break;
1601
1602         case LFUN_SCREEN_RECENTER:
1603                 recenter();
1604                 break;
1605
1606         case LFUN_BIBTEX_DATABASE_ADD: {
1607                 Cursor tmpcur = cur;
1608                 findInset(tmpcur, BIBTEX_CODE, false);
1609                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1610                                                 BIBTEX_CODE);
1611                 if (inset) {
1612                         if (inset->addDatabase(cmd.argument())) {
1613                                 buffer_.invalidateBibfileCache();
1614                                 dr.forceBufferUpdate();
1615                         }
1616                 }
1617                 break;
1618         }
1619
1620         case LFUN_BIBTEX_DATABASE_DEL: {
1621                 Cursor tmpcur = cur;
1622                 findInset(tmpcur, BIBTEX_CODE, false);
1623                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1624                                                 BIBTEX_CODE);
1625                 if (inset) {
1626                         if (inset->delDatabase(cmd.argument())) {
1627                                 buffer_.invalidateBibfileCache();
1628                                 dr.forceBufferUpdate();
1629                         }
1630                 }
1631                 break;
1632         }
1633
1634         case LFUN_STATISTICS: {
1635                 DocIterator from, to;
1636                 if (cur.selection()) {
1637                         from = cur.selectionBegin();
1638                         to = cur.selectionEnd();
1639                 } else {
1640                         from = doc_iterator_begin(&buffer_);
1641                         to = doc_iterator_end(&buffer_);
1642                 }
1643                 int const words = countWords(from, to);
1644                 int const chars = countChars(from, to, false);
1645                 int const chars_blanks = countChars(from, to, true);
1646                 docstring message;
1647                 if (cur.selection())
1648                         message = _("Statistics for the selection:");
1649                 else
1650                         message = _("Statistics for the document:");
1651                 message += "\n\n";
1652                 if (words != 1)
1653                         message += bformat(_("%1$d words"), words);
1654                 else
1655                         message += _("One word");
1656                 message += "\n";
1657                 if (chars_blanks != 1)
1658                         message += bformat(_("%1$d characters (including blanks)"),
1659                                           chars_blanks);
1660                 else
1661                         message += _("One character (including blanks)");
1662                 message += "\n";
1663                 if (chars != 1)
1664                         message += bformat(_("%1$d characters (excluding blanks)"),
1665                                           chars);
1666                 else
1667                         message += _("One character (excluding blanks)");
1668
1669                 Alert::information(_("Statistics"), message);
1670         }
1671                 break;
1672
1673         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1674                 // turn compression on/off
1675                 buffer_.params().compressed = !buffer_.params().compressed;
1676                 break;
1677
1678         case LFUN_BUFFER_TOGGLE_OUTPUT_SYNC:
1679                 buffer_.params().output_sync = !buffer_.params().output_sync;
1680                 break;
1681
1682         case LFUN_SCREEN_UP:
1683         case LFUN_SCREEN_DOWN: {
1684                 Point p = getPos(cur);
1685                 // This code has been commented out to enable to scroll down a
1686                 // document, even if there are large insets in it (see bug #5465).
1687                 /*if (p.y_ < 0 || p.y_ > height_) {
1688                         // The cursor is off-screen so recenter before proceeding.
1689                         showCursor();
1690                         p = getPos(cur);
1691                 }*/
1692                 int const scrolled = scroll(act == LFUN_SCREEN_UP
1693                         ? -height_ : height_);
1694                 if (act == LFUN_SCREEN_UP && scrolled > -height_)
1695                         p = Point(0, 0);
1696                 if (act == LFUN_SCREEN_DOWN && scrolled < height_)
1697                         p = Point(width_, height_);
1698                 Cursor old = cur;
1699                 bool const in_texted = cur.inTexted();
1700                 cur.reset();
1701                 buffer_.changed(true);
1702                 updateHoveredInset();
1703
1704                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
1705                         true, act == LFUN_SCREEN_UP);
1706                 cur.resetAnchor();
1707                 //FIXME: what to do with cur.x_target()?
1708                 bool update = in_texted && cur.bv().checkDepm(cur, old);
1709                 cur.finishUndo();
1710                 if (update) {
1711                         dr.screenUpdate(Update::Force | Update::FitCursor);
1712                         dr.forceBufferUpdate();
1713                 }
1714                 break;
1715         }
1716
1717         case LFUN_SCROLL:
1718                 lfunScroll(cmd);
1719                 dr.forceBufferUpdate();
1720                 break;
1721
1722         case LFUN_SCREEN_UP_SELECT: {
1723                 cur.selHandle(true);
1724                 if (isTopScreen()) {
1725                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1726                         cur.finishUndo();
1727                         break;
1728                 }
1729                 int y = getPos(cur).y_;
1730                 int const ymin = y - height_ + defaultRowHeight();
1731                 while (y > ymin && cur.up())
1732                         y = getPos(cur).y_;
1733
1734                 cur.finishUndo();
1735                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1736                 break;
1737         }
1738
1739         case LFUN_SCREEN_DOWN_SELECT: {
1740                 cur.selHandle(true);
1741                 if (isBottomScreen()) {
1742                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1743                         cur.finishUndo();
1744                         break;
1745                 }
1746                 int y = getPos(cur).y_;
1747                 int const ymax = y + height_ - defaultRowHeight();
1748                 while (y < ymax && cur.down())
1749                         y = getPos(cur).y_;
1750
1751                 cur.finishUndo();
1752                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1753                 break;
1754         }
1755
1756
1757         // This would be in Buffer class if only Cursor did not
1758         // require a bufferview
1759         case LFUN_INSET_FORALL: {
1760                 docstring const name = from_utf8(cmd.getArg(0));
1761                 string const commandstr = cmd.getLongArg(1);
1762                 FuncRequest const fr = lyxaction.lookupFunc(commandstr);
1763
1764                 // an arbitrary number to limit number of iterations
1765                 const int max_iter = 10000;
1766                 int iterations = 0;
1767                 Cursor & cur = d->cursor_;
1768                 Cursor const savecur = cur;
1769                 cur.reset();
1770                 if (!cur.nextInset())
1771                         cur.forwardInset();
1772                 cur.beginUndoGroup();
1773                 while(cur && iterations < max_iter) {
1774                         Inset * ins = cur.nextInset();
1775                         if (!ins)
1776                                 break;
1777                         docstring insname = ins->layoutName();
1778                         while (!insname.empty()) {
1779                                 if (insname == name || name == from_utf8("*")) {
1780                                         cur.recordUndo();
1781                                         lyx::dispatch(fr, dr);
1782                                         ++iterations;
1783                                         break;
1784                                 }
1785                                 size_t const i = insname.rfind(':');
1786                                 if (i == string::npos)
1787                                         break;
1788                                 insname = insname.substr(0, i);
1789                         }
1790                         cur.forwardInset();
1791                 }
1792                 cur.endUndoGroup();
1793                 cur = savecur;
1794                 cur.fixIfBroken();
1795                 dr.screenUpdate(Update::Force);
1796                 dr.forceBufferUpdate();
1797
1798                 if (iterations >= max_iter) {
1799                         dr.setError(true);
1800                         dr.setMessage(bformat(_("`inset-forall' interrupted because number of actions is larger than %1$d"), max_iter));
1801                 } else
1802                         dr.setMessage(bformat(_("Applied \"%1$s\" to %2$d insets"), from_utf8(commandstr), iterations));
1803                 break;
1804         }
1805
1806
1807         case LFUN_BRANCH_ADD_INSERT: {
1808                 docstring branch_name = from_utf8(cmd.getArg(0));
1809                 if (branch_name.empty())
1810                         if (!Alert::askForText(branch_name, _("Branch name")) ||
1811                                                 branch_name.empty())
1812                                 break;
1813
1814                 DispatchResult drtmp;
1815                 buffer_.dispatch(FuncRequest(LFUN_BRANCH_ADD, branch_name), drtmp);
1816                 if (drtmp.error()) {
1817                         Alert::warning(_("Branch already exists"), drtmp.message());
1818                         break;
1819                 }
1820                 BranchList & branch_list = buffer_.params().branchlist();
1821                 vector<docstring> const branches =
1822                         getVectorFromString(branch_name, branch_list.separator());
1823                 for (vector<docstring>::const_iterator it = branches.begin();
1824                      it != branches.end(); ++it) {
1825                         branch_name = *it;
1826                         lyx::dispatch(FuncRequest(LFUN_BRANCH_INSERT, branch_name));
1827                 }
1828                 break;
1829         }
1830
1831         case LFUN_KEYMAP_OFF:
1832                 getIntl().keyMapOn(false);
1833                 break;
1834
1835         case LFUN_KEYMAP_PRIMARY:
1836                 getIntl().keyMapPrim();
1837                 break;
1838
1839         case LFUN_KEYMAP_SECONDARY:
1840                 getIntl().keyMapSec();
1841                 break;
1842
1843         case LFUN_KEYMAP_TOGGLE:
1844                 getIntl().toggleKeyMap();
1845                 break;
1846
1847         case LFUN_DIALOG_SHOW_NEW_INSET: {
1848                 string const name = cmd.getArg(0);
1849                 string data = trim(to_utf8(cmd.argument()).substr(name.size()));
1850                 if (decodeInsetParam(name, data, buffer_))
1851                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, name + " " + data));
1852                 else
1853                         lyxerr << "Inset type '" << name <<
1854                         "' not recognized in LFUN_DIALOG_SHOW_NEW_INSET" <<  endl;
1855                 break;
1856         }
1857
1858         case LFUN_CITATION_INSERT: {
1859                 if (argument.empty()) {
1860                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW_NEW_INSET, "citation"));
1861                         break;
1862                 }
1863                 // we can have one optional argument, delimited by '|'
1864                 // citation-insert <key>|<text_before>
1865                 // this should be enhanced to also support text_after
1866                 // and citation style
1867                 string arg = argument;
1868                 string opt1;
1869                 if (contains(argument, "|")) {
1870                         arg = token(argument, '|', 0);
1871                         opt1 = token(argument, '|', 1);
1872                 }
1873                 InsetCommandParams icp(CITE_CODE);
1874                 icp["key"] = from_utf8(arg);
1875                 if (!opt1.empty())
1876                         icp["before"] = from_utf8(opt1);
1877                 string icstr = InsetCommand::params2string(icp);
1878                 FuncRequest fr(LFUN_INSET_INSERT, icstr);
1879                 lyx::dispatch(fr);
1880                 break;
1881         }
1882
1883         case LFUN_INSET_APPLY: {
1884                 string const name = cmd.getArg(0);
1885                 Inset * inset = editedInset(name);
1886                 if (!inset) {
1887                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1888                         lyx::dispatch(fr);
1889                         break;
1890                 }
1891                 // put cursor in front of inset.
1892                 if (!setCursorFromInset(inset)) {
1893                         LASSERT(false, break);
1894                 }
1895                 cur.recordUndo();
1896                 FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1897                 inset->dispatch(cur, fr);
1898                 dr.screenUpdate(cur.result().screenUpdate());
1899                 if (cur.result().needBufferUpdate())
1900                         dr.forceBufferUpdate();
1901                 break;
1902         }
1903
1904         // FIXME:
1905         // The change of language of buffer belongs to the Buffer class.
1906         // We have to do it here because we need a cursor for Undo.
1907         // When Undo::recordUndoBufferParams() is implemented someday
1908         // LFUN_BUFFER_LANGUAGE should be handled by the Buffer class.
1909         case LFUN_BUFFER_LANGUAGE: {
1910                 Language const * oldL = buffer_.params().language;
1911                 Language const * newL = languages.getLanguage(argument);
1912                 if (!newL || oldL == newL)
1913                         break;
1914                 if (oldL->rightToLeft() == newL->rightToLeft()) {
1915                         cur.recordUndoFullDocument();
1916                         buffer_.changeLanguage(oldL, newL);
1917                         cur.setCurrentFont();
1918                         dr.forceBufferUpdate();
1919                 }
1920                 break;
1921         }
1922
1923         // FIXME We do not really want this here, but it has to be at present
1924         // because we need a cursor for the recordUndoFullDocument call. What
1925         // we would really like is a recordUndoBufferParams call that did not
1926         // need a cursor, but we do not have that yet.
1927         // So, if this does get fixed, this code can be moved back to Buffer.cpp,
1928         // and the corresponding code in getStatus() should be moved back, too.
1929         case LFUN_BRANCH_ACTIVATE:
1930         case LFUN_BRANCH_DEACTIVATE: {
1931                 BranchList & branch_list = buffer().params().branchlist();
1932                 docstring const branch_name = cmd.argument();
1933                 // the case without a branch name is handled elsewhere
1934                 if (branch_name.empty()) {
1935                         dispatched = false;
1936                         break;
1937                 }
1938                 Branch * branch = branch_list.find(branch_name);
1939                 if (!branch) {
1940                         LYXERR0("Branch " << branch_name << " does not exist.");
1941                         dr.setError(true);
1942                         docstring const msg =
1943                                 bformat(_("Branch \"%1$s\" does not exist."), branch_name);
1944                         dr.setMessage(msg);
1945                         break;
1946                 }
1947                 bool activate = cmd.action() == LFUN_BRANCH_ACTIVATE;
1948                 if (branch->isSelected() != activate) {
1949                         branch->setSelected(activate);
1950                         cur.recordUndoFullDocument();
1951                         dr.setError(false);
1952                         dr.screenUpdate(Update::Force);
1953                         dr.forceBufferUpdate();
1954                 }
1955                 break;
1956         }
1957
1958         default:
1959                 // OK, so try the Buffer itself...
1960                 buffer_.dispatch(cmd, dr);
1961                 dispatched = dr.dispatched();
1962                 break;
1963         }
1964
1965         buffer_.undo().endUndoGroup();
1966         dr.dispatched(dispatched);
1967 }
1968
1969
1970 docstring const BufferView::requestSelection()
1971 {
1972         Cursor & cur = d->cursor_;
1973
1974         LYXERR(Debug::SELECTION, "requestSelection: cur.selection: " << cur.selection());
1975         if (!cur.selection()) {
1976                 d->xsel_cache_.set = false;
1977                 return docstring();
1978         }
1979
1980         LYXERR(Debug::SELECTION, "requestSelection: xsel_cache.set: " << d->xsel_cache_.set);
1981         if (!d->xsel_cache_.set ||
1982             cur.top() != d->xsel_cache_.cursor ||
1983             cur.realAnchor().top() != d->xsel_cache_.anchor)
1984         {
1985                 d->xsel_cache_.cursor = cur.top();
1986                 d->xsel_cache_.anchor = cur.realAnchor().top();
1987                 d->xsel_cache_.set = cur.selection();
1988                 return cur.selectionAsString(false);
1989         }
1990         return docstring();
1991 }
1992
1993
1994 void BufferView::clearSelection()
1995 {
1996         d->cursor_.clearSelection();
1997         // Clear the selection buffer. Otherwise a subsequent
1998         // middle-mouse-button paste would use the selection buffer,
1999         // not the more current external selection.
2000         cap::clearSelection();
2001         d->xsel_cache_.set = false;
2002         // The buffer did not really change, but this causes the
2003         // redraw we need because we cleared the selection above.
2004         buffer_.changed(false);
2005 }
2006
2007
2008 void BufferView::resize(int width, int height)
2009 {
2010         // Update from work area
2011         width_ = width;
2012         height_ = height;
2013
2014         // Clear the paragraph height cache.
2015         d->par_height_.clear();
2016         // Redo the metrics.
2017         updateMetrics();
2018 }
2019
2020
2021 Inset const * BufferView::getCoveringInset(Text const & text,
2022                 int x, int y) const
2023 {
2024         TextMetrics & tm = d->text_metrics_[&text];
2025         Inset * inset = tm.checkInsetHit(x, y);
2026         if (!inset)
2027                 return 0;
2028
2029         if (!inset->descendable(*this))
2030                 // No need to go further down if the inset is not
2031                 // descendable.
2032                 return inset;
2033
2034         size_t cell_number = inset->nargs();
2035         // Check all the inner cell.
2036         for (size_t i = 0; i != cell_number; ++i) {
2037                 Text const * inner_text = inset->getText(i);
2038                 if (inner_text) {
2039                         // Try deeper.
2040                         Inset const * inset_deeper =
2041                                 getCoveringInset(*inner_text, x, y);
2042                         if (inset_deeper)
2043                                 return inset_deeper;
2044                 }
2045         }
2046
2047         return inset;
2048 }
2049
2050
2051 void BufferView::updateHoveredInset() const
2052 {
2053         // Get inset under mouse, if there is one.
2054         int const x = d->mouse_position_cache_.x_;
2055         int const y = d->mouse_position_cache_.y_;
2056         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
2057
2058         d->clickable_inset_ = covering_inset && covering_inset->clickable(x, y);
2059
2060         if (covering_inset == d->last_inset_)
2061                 // Same inset, no need to do anything...
2062                 return;
2063
2064         bool need_redraw = false;
2065         if (d->last_inset_) {
2066                 // Remove the hint on the last hovered inset (if any).
2067                 need_redraw |= d->last_inset_->setMouseHover(this, false);
2068                 d->last_inset_ = 0;
2069         }
2070
2071         if (covering_inset && covering_inset->setMouseHover(this, true)) {
2072                 need_redraw = true;
2073                 // Only the insets that accept the hover state, do
2074                 // clear the last_inset_, so only set the last_inset_
2075                 // member if the hovered setting is accepted.
2076                 d->last_inset_ = covering_inset;
2077         }
2078
2079         if (need_redraw) {
2080                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
2081                                 << d->mouse_position_cache_.x_ << ", "
2082                                 << d->mouse_position_cache_.y_ << ")");
2083
2084                 d->update_strategy_ = DecorationUpdate;
2085
2086                 // This event (moving without mouse click) is not passed further.
2087                 // This should be changed if it is further utilized.
2088                 buffer_.changed(false);
2089         }
2090 }
2091
2092
2093 void BufferView::clearLastInset(Inset * inset) const
2094 {
2095         if (d->last_inset_ != inset) {
2096                 LYXERR0("Wrong last_inset!");
2097                 LASSERT(false, /**/);
2098         }
2099         d->last_inset_ = 0;
2100 }
2101
2102
2103 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
2104 {
2105         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
2106
2107         // This is only called for mouse related events including
2108         // LFUN_FILE_OPEN generated by drag-and-drop.
2109         FuncRequest cmd = cmd0;
2110
2111         Cursor old = cursor();
2112         Cursor cur(*this);
2113         cur.push(buffer_.inset());
2114         cur.setSelection(d->cursor_.selection());
2115
2116         // Either the inset under the cursor or the
2117         // surrounding Text will handle this event.
2118
2119         // make sure we stay within the screen...
2120         cmd.set_y(min(max(cmd.y(), -1), height_));
2121
2122         d->mouse_position_cache_.x_ = cmd.x();
2123         d->mouse_position_cache_.y_ = cmd.y();
2124
2125         if (cmd.action() == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
2126                 updateHoveredInset();
2127                 return;
2128         }
2129
2130         // Build temporary cursor.
2131         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x(), cmd.y());
2132
2133         // Put anchor at the same position.
2134         cur.resetAnchor();
2135
2136         cur.beginUndoGroup();
2137
2138         // Try to dispatch to an non-editable inset near this position
2139         // via the temp cursor. If the inset wishes to change the real
2140         // cursor it has to do so explicitly by using
2141         //  cur.bv().cursor() = cur;  (or similar)
2142         if (inset)
2143                 inset->dispatch(cur, cmd);
2144
2145         // Now dispatch to the temporary cursor. If the real cursor should
2146         // be modified, the inset's dispatch has to do so explicitly.
2147         if (!inset || !cur.result().dispatched())
2148                 cur.dispatch(cmd);
2149
2150         cur.endUndoGroup();
2151
2152         // Notify left insets
2153         if (cur != old) {
2154                 old.fixIfBroken();
2155                 bool badcursor = notifyCursorLeavesOrEnters(old, cur);
2156                 if (badcursor)
2157                         cursor().fixIfBroken();
2158         }
2159
2160         // Do we have a selection?
2161         theSelection().haveSelection(cursor().selection());
2162
2163         if (cur.needBufferUpdate()) {
2164                 cur.clearBufferUpdate();
2165                 buffer().updateBuffer();
2166         }
2167
2168         // If the command has been dispatched,
2169         if (cur.result().dispatched() || cur.result().screenUpdate())
2170                 processUpdateFlags(cur.result().screenUpdate());
2171 }
2172
2173
2174 void BufferView::lfunScroll(FuncRequest const & cmd)
2175 {
2176         string const scroll_type = cmd.getArg(0);
2177         int scroll_step = 0;
2178         if (scroll_type == "line")
2179                 scroll_step = d->scrollbarParameters_.single_step;
2180         else if (scroll_type == "page")
2181                 scroll_step = d->scrollbarParameters_.page_step;
2182         else
2183                 return;
2184         string const scroll_quantity = cmd.getArg(1);
2185         if (scroll_quantity == "up")
2186                 scrollUp(scroll_step);
2187         else if (scroll_quantity == "down")
2188                 scrollDown(scroll_step);
2189         else {
2190                 int const scroll_value = convert<int>(scroll_quantity);
2191                 if (scroll_value)
2192                         scroll(scroll_step * scroll_value);
2193         }
2194         buffer_.changed(true);
2195         updateHoveredInset();
2196 }
2197
2198
2199 int BufferView::minVisiblePart()
2200 {
2201         return 2 * defaultRowHeight();
2202 }
2203
2204
2205 int BufferView::scroll(int y)
2206 {
2207         if (y > 0)
2208                 return scrollDown(y);
2209         if (y < 0)
2210                 return scrollUp(-y);
2211         return 0;
2212 }
2213
2214
2215 int BufferView::scrollDown(int offset)
2216 {
2217         Text * text = &buffer_.text();
2218         TextMetrics & tm = d->text_metrics_[text];
2219         int const ymax = height_ + offset;
2220         while (true) {
2221                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
2222                 int bottom_pos = last.second->position() + last.second->descent();
2223                 if (lyxrc.scroll_below_document)
2224                         bottom_pos += height_ - minVisiblePart();
2225                 if (last.first + 1 == int(text->paragraphs().size())) {
2226                         if (bottom_pos <= height_)
2227                                 return 0;
2228                         offset = min(offset, bottom_pos - height_);
2229                         break;
2230                 }
2231                 if (bottom_pos > ymax)
2232                         break;
2233                 tm.newParMetricsDown();
2234         }
2235         d->anchor_ypos_ -= offset;
2236         return -offset;
2237 }
2238
2239
2240 int BufferView::scrollUp(int offset)
2241 {
2242         Text * text = &buffer_.text();
2243         TextMetrics & tm = d->text_metrics_[text];
2244         int ymin = - offset;
2245         while (true) {
2246                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
2247                 int top_pos = first.second->position() - first.second->ascent();
2248                 if (first.first == 0) {
2249                         if (top_pos >= 0)
2250                                 return 0;
2251                         offset = min(offset, - top_pos);
2252                         break;
2253                 }
2254                 if (top_pos < ymin)
2255                         break;
2256                 tm.newParMetricsUp();
2257         }
2258         d->anchor_ypos_ += offset;
2259         return offset;
2260 }
2261
2262
2263 void BufferView::setCursorFromRow(int row)
2264 {
2265         int tmpid;
2266         int tmppos;
2267         pit_type newpit = 0;
2268         pos_type newpos = 0;
2269
2270         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
2271
2272         bool posvalid = (tmpid != -1);
2273         if (posvalid) {
2274                 // we need to make sure that the row and position
2275                 // we got back are valid, because the buffer may well
2276                 // have changed since we last generated the LaTeX.
2277                 DocIterator const dit = buffer_.getParFromID(tmpid);
2278                 if (dit == doc_iterator_end(&buffer_))
2279                         posvalid = false;
2280                 else {
2281                         newpit = dit.pit();
2282                         // now have to check pos.
2283                         newpos = tmppos;
2284                         Paragraph const & par = buffer_.text().getPar(newpit);
2285                         if (newpos > par.size()) {
2286                                 LYXERR0("Requested position no longer valid.");
2287                                 newpos = par.size() - 1;
2288                         }
2289                 }
2290         }
2291         if (!posvalid) {
2292                 frontend::Alert::error(_("Inverse Search Failed"),
2293                         _("Invalid position requested by inverse search.\n"
2294                     "You need to update the viewed document."));
2295                 return;
2296         }
2297         d->cursor_.reset();
2298         buffer_.text().setCursor(d->cursor_, newpit, newpos);
2299         d->cursor_.setSelection(false);
2300         d->cursor_.resetAnchor();
2301         recenter();
2302 }
2303
2304
2305 bool BufferView::setCursorFromInset(Inset const * inset)
2306 {
2307         // are we already there?
2308         if (cursor().nextInset() == inset)
2309                 return true;
2310
2311         // Inset is not at cursor position. Find it in the document.
2312         Cursor cur(*this);
2313         cur.reset();
2314         while (cur && cur.nextInset() != inset)
2315                 cur.forwardInset();
2316
2317         if (cur) {
2318                 setCursor(cur);
2319                 return true;
2320         }
2321         return false;
2322 }
2323
2324
2325 void BufferView::gotoLabel(docstring const & label)
2326 {
2327         ListOfBuffers bufs = buffer().allRelatives();
2328         ListOfBuffers::iterator it = bufs.begin();
2329         for (; it != bufs.end(); ++it) {
2330                 Buffer const * buf = *it;
2331
2332                 // find label
2333                 Toc & toc = buf->tocBackend().toc("label");
2334                 TocIterator toc_it = toc.begin();
2335                 TocIterator end = toc.end();
2336                 for (; toc_it != end; ++toc_it) {
2337                         if (label == toc_it->str()) {
2338                                 lyx::dispatch(toc_it->action());
2339                                 return;
2340                         }
2341                 }
2342         }
2343 }
2344
2345
2346 TextMetrics const & BufferView::textMetrics(Text const * t) const
2347 {
2348         return const_cast<BufferView *>(this)->textMetrics(t);
2349 }
2350
2351
2352 TextMetrics & BufferView::textMetrics(Text const * t)
2353 {
2354         LASSERT(t, /**/);
2355         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
2356         if (tmc_it == d->text_metrics_.end()) {
2357                 tmc_it = d->text_metrics_.insert(
2358                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
2359         }
2360         return tmc_it->second;
2361 }
2362
2363
2364 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
2365                 pit_type pit) const
2366 {
2367         return textMetrics(t).parMetrics(pit);
2368 }
2369
2370
2371 int BufferView::workHeight() const
2372 {
2373         return height_;
2374 }
2375
2376
2377 void BufferView::setCursor(DocIterator const & dit)
2378 {
2379         d->cursor_.reset();
2380         size_t const n = dit.depth();
2381         for (size_t i = 0; i < n; ++i)
2382                 dit[i].inset().edit(d->cursor_, true);
2383
2384         d->cursor_.setCursor(dit);
2385         d->cursor_.setSelection(false);
2386         // FIXME
2387         // It seems on general grounds as if this is probably needed, but
2388         // it is not yet clear.
2389         // See bug #7394 and r38388.
2390         // d->cursor.resetAnchor();
2391 }
2392
2393
2394 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
2395 {
2396         // Would be wrong to delete anything if we have a selection.
2397         if (cur.selection())
2398                 return false;
2399
2400         bool need_anchor_change = false;
2401         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
2402                 need_anchor_change);
2403
2404         if (need_anchor_change)
2405                 cur.resetAnchor();
2406
2407         if (!changed)
2408                 return false;
2409
2410         d->cursor_ = cur;
2411
2412         cur.forceBufferUpdate();
2413         buffer_.changed(true);
2414         return true;
2415 }
2416
2417
2418 bool BufferView::mouseSetCursor(Cursor & cur, bool select)
2419 {
2420         LASSERT(&cur.bv() == this, /**/);
2421
2422         if (!select)
2423                 // this event will clear selection so we save selection for
2424                 // persistent selection
2425                 cap::saveSelection(cursor());
2426
2427         d->cursor_.macroModeClose();
2428
2429         // Has the cursor just left the inset?
2430         bool const leftinset = (&d->cursor_.inset() != &cur.inset());
2431         if (leftinset)
2432                 d->cursor_.fixIfBroken();
2433
2434         // FIXME: shift-mouse selection doesn't work well across insets.
2435         bool const do_selection =
2436                         select && &d->cursor_.normalAnchor().inset() == &cur.inset();
2437
2438         // do the dEPM magic if needed
2439         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
2440         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
2441         // the leftinset bool would not be necessary (badcursor instead).
2442         bool update = leftinset;
2443         if (!do_selection && d->cursor_.inTexted())
2444                 update |= checkDepm(cur, d->cursor_);
2445
2446         if (!do_selection)
2447                 d->cursor_.resetAnchor();
2448         d->cursor_.setCursor(cur);
2449         d->cursor_.boundary(cur.boundary());
2450         if (do_selection)
2451                 d->cursor_.setSelection();
2452         else
2453                 d->cursor_.clearSelection();
2454
2455         d->cursor_.finishUndo();
2456         d->cursor_.setCurrentFont();
2457         if (update)
2458                 cur.forceBufferUpdate();
2459         return update;
2460 }
2461
2462
2463 void BufferView::putSelectionAt(DocIterator const & cur,
2464                                 int length, bool backwards)
2465 {
2466         d->cursor_.clearSelection();
2467
2468         setCursor(cur);
2469
2470         if (length) {
2471                 if (backwards) {
2472                         d->cursor_.pos() += length;
2473                         d->cursor_.setSelection(d->cursor_, -length);
2474                 } else
2475                         d->cursor_.setSelection(d->cursor_, length);
2476         }
2477 }
2478
2479
2480 bool BufferView::selectIfEmpty(DocIterator & cur)
2481 {
2482         if (!cur.paragraph().empty())
2483                 return false;
2484
2485         pit_type const beg_pit = cur.pit();
2486         if (beg_pit > 0) {
2487                 // The paragraph associated to this item isn't
2488                 // the first one, so it can be selected
2489                 cur.backwardPos();
2490         } else {
2491                 // We have to resort to select the space between the
2492                 // end of this item and the begin of the next one
2493                 cur.forwardPos();
2494         }
2495         if (cur.empty()) {
2496                 // If it is the only item in the document,
2497                 // nothing can be selected
2498                 return false;
2499         }
2500         pit_type const end_pit = cur.pit();
2501         pos_type const end_pos = cur.pos();
2502         d->cursor_.clearSelection();
2503         d->cursor_.reset();
2504         d->cursor_.setCursor(cur);
2505         d->cursor_.pit() = beg_pit;
2506         d->cursor_.pos() = 0;
2507         d->cursor_.setSelection(false);
2508         d->cursor_.resetAnchor();
2509         d->cursor_.pit() = end_pit;
2510         d->cursor_.pos() = end_pos;
2511         d->cursor_.setSelection();
2512         return true;
2513 }
2514
2515
2516 Cursor & BufferView::cursor()
2517 {
2518         return d->cursor_;
2519 }
2520
2521
2522 Cursor const & BufferView::cursor() const
2523 {
2524         return d->cursor_;
2525 }
2526
2527
2528 pit_type BufferView::anchor_ref() const
2529 {
2530         return d->anchor_pit_;
2531 }
2532
2533
2534 bool BufferView::singleParUpdate()
2535 {
2536         Text & buftext = buffer_.text();
2537         pit_type const bottom_pit = d->cursor_.bottom().pit();
2538         TextMetrics & tm = textMetrics(&buftext);
2539         int old_height = tm.parMetrics(bottom_pit).height();
2540
2541         // make sure inline completion pointer is ok
2542         if (d->inlineCompletionPos_.fixIfBroken())
2543                 d->inlineCompletionPos_ = DocIterator();
2544
2545         // In Single Paragraph mode, rebreak only
2546         // the (main text, not inset!) paragraph containing the cursor.
2547         // (if this paragraph contains insets etc., rebreaking will
2548         // recursively descend)
2549         tm.redoParagraph(bottom_pit);
2550         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
2551         if (pm.height() != old_height)
2552                 // Paragraph height has changed so we cannot proceed to
2553                 // the singlePar optimisation.
2554                 return false;
2555
2556         d->update_strategy_ = SingleParUpdate;
2557
2558         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
2559                 << " y2: " << pm.position() + pm.descent()
2560                 << " pit: " << bottom_pit
2561                 << " singlepar: 1");
2562         return true;
2563 }
2564
2565
2566 void BufferView::updateMetrics()
2567 {
2568         if (height_ == 0 || width_ == 0)
2569                 return;
2570
2571         Text & buftext = buffer_.text();
2572         pit_type const npit = int(buftext.paragraphs().size());
2573
2574         // Clear out the position cache in case of full screen redraw,
2575         d->coord_cache_.clear();
2576
2577         // Clear out paragraph metrics to avoid having invalid metrics
2578         // in the cache from paragraphs not relayouted below
2579         // The complete text metrics will be redone.
2580         d->text_metrics_.clear();
2581
2582         TextMetrics & tm = textMetrics(&buftext);
2583
2584         // make sure inline completion pointer is ok
2585         if (d->inlineCompletionPos_.fixIfBroken())
2586                 d->inlineCompletionPos_ = DocIterator();
2587
2588         if (d->anchor_pit_ >= npit)
2589                 // The anchor pit must have been deleted...
2590                 d->anchor_pit_ = npit - 1;
2591
2592         // Rebreak anchor paragraph.
2593         tm.redoParagraph(d->anchor_pit_);
2594         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
2595
2596         // position anchor
2597         if (d->anchor_pit_ == 0) {
2598                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
2599
2600                 // Complete buffer visible? Then it's easy.
2601                 if (scrollRange == 0)
2602                         d->anchor_ypos_ = anchor_pm.ascent();
2603
2604                 // FIXME: Some clever handling needed to show
2605                 // the _first_ paragraph up to the top if the cursor is
2606                 // in the first line.
2607         }
2608         anchor_pm.setPosition(d->anchor_ypos_);
2609
2610         LYXERR(Debug::PAINTING, "metrics: "
2611                 << " anchor pit = " << d->anchor_pit_
2612                 << " anchor ypos = " << d->anchor_ypos_);
2613
2614         // Redo paragraphs above anchor if necessary.
2615         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
2616         // We are now just above the anchor paragraph.
2617         pit_type pit1 = d->anchor_pit_ - 1;
2618         for (; pit1 >= 0 && y1 >= 0; --pit1) {
2619                 tm.redoParagraph(pit1);
2620                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
2621                 y1 -= pm.descent();
2622                 // Save the paragraph position in the cache.
2623                 pm.setPosition(y1);
2624                 y1 -= pm.ascent();
2625         }
2626
2627         // Redo paragraphs below the anchor if necessary.
2628         int y2 = d->anchor_ypos_ + anchor_pm.descent();
2629         // We are now just below the anchor paragraph.
2630         pit_type pit2 = d->anchor_pit_ + 1;
2631         for (; pit2 < npit && y2 <= height_; ++pit2) {
2632                 tm.redoParagraph(pit2);
2633                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
2634                 y2 += pm.ascent();
2635                 // Save the paragraph position in the cache.
2636                 pm.setPosition(y2);
2637                 y2 += pm.descent();
2638         }
2639
2640         LYXERR(Debug::PAINTING, "Metrics: "
2641                 << " anchor pit = " << d->anchor_pit_
2642                 << " anchor ypos = " << d->anchor_ypos_
2643                 << " y1 = " << y1
2644                 << " y2 = " << y2
2645                 << " pit1 = " << pit1
2646                 << " pit2 = " << pit2);
2647
2648         d->update_strategy_ = FullScreenUpdate;
2649
2650         if (lyxerr.debugging(Debug::WORKAREA)) {
2651                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
2652                 d->coord_cache_.dump();
2653         }
2654 }
2655
2656
2657 void BufferView::insertLyXFile(FileName const & fname)
2658 {
2659         LASSERT(d->cursor_.inTexted(), /**/);
2660
2661         // Get absolute path of file and add ".lyx"
2662         // to the filename if necessary
2663         FileName filename = fileSearch(string(), fname.absFileName(), "lyx");
2664
2665         docstring const disp_fn = makeDisplayPath(filename.absFileName());
2666         // emit message signal.
2667         message(bformat(_("Inserting document %1$s..."), disp_fn));
2668
2669         docstring res;
2670         Buffer buf(filename.absFileName(), false);
2671         if (buf.loadLyXFile() == Buffer::ReadSuccess) {
2672                 ErrorList & el = buffer_.errorList("Parse");
2673                 // Copy the inserted document error list into the current buffer one.
2674                 el = buf.errorList("Parse");
2675                 buffer_.undo().recordUndo(d->cursor_);
2676                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
2677                                              buf.params().documentClassPtr(), el);
2678                 res = _("Document %1$s inserted.");
2679         } else {
2680                 res = _("Could not insert document %1$s");
2681         }
2682
2683         buffer_.changed(true);
2684         // emit message signal.
2685         message(bformat(res, disp_fn));
2686 }
2687
2688
2689 Point BufferView::coordOffset(DocIterator const & dit) const
2690 {
2691         int x = 0;
2692         int y = 0;
2693         int lastw = 0;
2694
2695         // Addup contribution of nested insets, from inside to outside,
2696         // keeping the outer paragraph for a special handling below
2697         for (size_t i = dit.depth() - 1; i >= 1; --i) {
2698                 CursorSlice const & sl = dit[i];
2699                 int xx = 0;
2700                 int yy = 0;
2701
2702                 // get relative position inside sl.inset()
2703                 sl.inset().cursorPos(*this, sl, dit.boundary() && (i + 1 == dit.depth()), xx, yy);
2704
2705                 // Make relative position inside of the edited inset relative to sl.inset()
2706                 x += xx;
2707                 y += yy;
2708
2709                 // In case of an RTL inset, the edited inset will be positioned to the left
2710                 // of xx:yy
2711                 if (sl.text()) {
2712                         bool boundary_i = dit.boundary() && i + 1 == dit.depth();
2713                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
2714                         if (rtl)
2715                                 x -= lastw;
2716                 }
2717
2718                 // remember width for the case that sl.inset() is positioned in an RTL inset
2719                 if (i && dit[i - 1].text()) {
2720                         // If this Inset is inside a Text Inset, retrieve the Dimension
2721                         // from the containing text instead of using Inset::dimension() which
2722                         // might not be implemented.
2723                         // FIXME (Abdel 23/09/2007): this is a bit messy because of the
2724                         // elimination of Inset::dim_ cache. This coordOffset() method needs
2725                         // to be rewritten in light of the new design.
2726                         Dimension const & dim = parMetrics(dit[i - 1].text(),
2727                                 dit[i - 1].pit()).insetDimension(&sl.inset());
2728                         lastw = dim.wid;
2729                 } else {
2730                         Dimension const dim = sl.inset().dimension(*this);
2731                         lastw = dim.wid;
2732                 }
2733
2734                 //lyxerr << "Cursor::getPos, i: "
2735                 // << i << " x: " << xx << " y: " << y << endl;
2736         }
2737
2738         // Add contribution of initial rows of outermost paragraph
2739         CursorSlice const & sl = dit[0];
2740         TextMetrics const & tm = textMetrics(sl.text());
2741         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
2742         LASSERT(!pm.rows().empty(), /**/);
2743         y -= pm.rows()[0].ascent();
2744 #if 1
2745         // FIXME: document this mess
2746         size_t rend;
2747         if (sl.pos() > 0 && dit.depth() == 1) {
2748                 int pos = sl.pos();
2749                 if (pos && dit.boundary())
2750                         --pos;
2751 //              lyxerr << "coordOffset: boundary:" << dit.boundary() << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
2752                 rend = pm.pos2row(pos);
2753         } else
2754                 rend = pm.pos2row(sl.pos());
2755 #else
2756         size_t rend = pm.pos2row(sl.pos());
2757 #endif
2758         for (size_t rit = 0; rit != rend; ++rit)
2759                 y += pm.rows()[rit].height();
2760         y += pm.rows()[rend].ascent();
2761
2762         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2763
2764         // Make relative position from the nested inset now bufferview absolute.
2765         int xx = bottom_tm.cursorX(dit.bottom(), dit.boundary() && dit.depth() == 1);
2766         x += xx;
2767
2768         // In the RTL case place the nested inset at the left of the cursor in
2769         // the outer paragraph
2770         bool boundary_1 = dit.boundary() && 1 == dit.depth();
2771         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2772         if (rtl)
2773                 x -= lastw;
2774
2775         return Point(x, y);
2776 }
2777
2778
2779 Point BufferView::getPos(DocIterator const & dit) const
2780 {
2781         if (!paragraphVisible(dit))
2782                 return Point(-1, -1);
2783
2784         CursorSlice const & bot = dit.bottom();
2785         TextMetrics const & tm = textMetrics(bot.text());
2786
2787         // offset from outer paragraph
2788         Point p = coordOffset(dit);
2789         p.y_ += tm.parMetrics(bot.pit()).position();
2790         return p;
2791 }
2792
2793
2794 bool BufferView::paragraphVisible(DocIterator const & dit) const
2795 {
2796         CursorSlice const & bot = dit.bottom();
2797         TextMetrics const & tm = textMetrics(bot.text());
2798
2799         return tm.contains(bot.pit());
2800 }
2801
2802
2803 void BufferView::cursorPosAndHeight(Point & p, int & h) const
2804 {
2805         Cursor const & cur = cursor();
2806         Font const font = cur.getFont();
2807         frontend::FontMetrics const & fm = theFontMetrics(font);
2808         int const asc = fm.maxAscent();
2809         int const des = fm.maxDescent();
2810         h = asc + des;
2811         p = getPos(cur);
2812         p.y_ -= asc;
2813 }
2814
2815
2816 bool BufferView::cursorInView(Point const & p, int h) const
2817 {
2818         Cursor const & cur = cursor();
2819         // does the cursor touch the screen ?
2820         if (p.y_ + h < 0 || p.y_ >= workHeight() || !paragraphVisible(cur))
2821                 return false;
2822         return true;
2823 }
2824
2825
2826 void BufferView::draw(frontend::Painter & pain)
2827 {
2828         if (height_ == 0 || width_ == 0)
2829                 return;
2830         LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
2831
2832         Text & text = buffer_.text();
2833         TextMetrics const & tm = d->text_metrics_[&text];
2834         int const y = tm.first().second->position();
2835         PainterInfo pi(this, pain);
2836
2837         switch (d->update_strategy_) {
2838
2839         case NoScreenUpdate:
2840                 // If no screen painting is actually needed, only some the different
2841                 // coordinates of insets and paragraphs needs to be updated.
2842                 pi.full_repaint = true;
2843                 pi.pain.setDrawingEnabled(false);
2844                 tm.draw(pi, 0, y);
2845                 break;
2846
2847         case SingleParUpdate:
2848                 pi.full_repaint = false;
2849                 // In general, only the current row of the outermost paragraph
2850                 // will be redrawn. Particular cases where selection spans
2851                 // multiple paragraph are correctly detected in TextMetrics.
2852                 tm.draw(pi, 0, y);
2853                 break;
2854
2855         case DecorationUpdate:
2856                 // FIXME: We should also distinguish DecorationUpdate to avoid text
2857                 // drawing if possible. This is not possible to do easily right now
2858                 // because of the single backing pixmap.
2859
2860         case FullScreenUpdate:
2861                 // The whole screen, including insets, will be refreshed.
2862                 pi.full_repaint = true;
2863
2864                 // Clear background.
2865                 pain.fillRectangle(0, 0, width_, height_,
2866                         pi.backgroundColor(&buffer_.inset()));
2867
2868                 // Draw everything.
2869                 tm.draw(pi, 0, y);
2870
2871                 // and possibly grey out below
2872                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2873                 int const y2 = lastpm.second->position() + lastpm.second->descent();
2874
2875                 if (y2 < height_) {
2876                         Color color = buffer().isInternal()
2877                                 ? Color_background : Color_bottomarea;
2878                         pain.fillRectangle(0, y2, width_, height_ - y2, color);
2879                 }
2880                 break;
2881         }
2882         LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
2883
2884         // The scrollbar needs an update.
2885         updateScrollbar();
2886
2887         // Normalize anchor for next time
2888         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
2889         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2890         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
2891                 ParagraphMetrics const & pm = tm.parMetrics(pit);
2892                 if (pm.position() + pm.descent() > 0) {
2893                         d->anchor_pit_ = pit;
2894                         d->anchor_ypos_ = pm.position();
2895                         break;
2896                 }
2897         }
2898         LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
2899                 << "  anchor ypos = " << d->anchor_ypos_);
2900 }
2901
2902
2903 void BufferView::message(docstring const & msg)
2904 {
2905         if (d->gui_)
2906                 d->gui_->message(msg);
2907 }
2908
2909
2910 void BufferView::showDialog(string const & name)
2911 {
2912         if (d->gui_)
2913                 d->gui_->showDialog(name, string());
2914 }
2915
2916
2917 void BufferView::showDialog(string const & name,
2918         string const & data, Inset * inset)
2919 {
2920         if (d->gui_)
2921                 d->gui_->showDialog(name, data, inset);
2922 }
2923
2924
2925 void BufferView::updateDialog(string const & name, string const & data)
2926 {
2927         if (d->gui_)
2928                 d->gui_->updateDialog(name, data);
2929 }
2930
2931
2932 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
2933 {
2934         d->gui_ = gui;
2935 }
2936
2937
2938 // FIXME: Move this out of BufferView again
2939 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
2940 {
2941         if (!fname.isReadableFile()) {
2942                 docstring const error = from_ascii(strerror(errno));
2943                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
2944                 docstring const text =
2945                   bformat(_("Could not read the specified document\n"
2946                             "%1$s\ndue to the error: %2$s"), file, error);
2947                 Alert::error(_("Could not read file"), text);
2948                 return docstring();
2949         }
2950
2951         if (!fname.isReadableFile()) {
2952                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
2953                 docstring const text =
2954                   bformat(_("%1$s\n is not readable."), file);
2955                 Alert::error(_("Could not open file"), text);
2956                 return docstring();
2957         }
2958
2959         // FIXME UNICODE: We don't know the encoding of the file
2960         docstring file_content = fname.fileContents("UTF-8");
2961         if (file_content.empty()) {
2962                 Alert::error(_("Reading not UTF-8 encoded file"),
2963                              _("The file is not UTF-8 encoded.\n"
2964                                "It will be read as local 8Bit-encoded.\n"
2965                                "If this does not give the correct result\n"
2966                                "then please change the encoding of the file\n"
2967                                "to UTF-8 with a program other than LyX.\n"));
2968                 file_content = fname.fileContents("local8bit");
2969         }
2970
2971         return normalize_c(file_content);
2972 }
2973
2974
2975 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
2976 {
2977         docstring const tmpstr = contentsOfPlaintextFile(f);
2978
2979         if (tmpstr.empty())
2980                 return;
2981
2982         Cursor & cur = cursor();
2983         cap::replaceSelection(cur);
2984         buffer_.undo().recordUndo(cur);
2985         if (asParagraph)
2986                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr, cur.current_font);
2987         else
2988                 cur.innerText()->insertStringAsLines(cur, tmpstr, cur.current_font);
2989
2990         buffer_.changed(true);
2991 }
2992
2993
2994 docstring const & BufferView::inlineCompletion() const
2995 {
2996         return d->inlineCompletion_;
2997 }
2998
2999
3000 size_t const & BufferView::inlineCompletionUniqueChars() const
3001 {
3002         return d->inlineCompletionUniqueChars_;
3003 }
3004
3005
3006 DocIterator const & BufferView::inlineCompletionPos() const
3007 {
3008         return d->inlineCompletionPos_;
3009 }
3010
3011
3012 void BufferView::resetInlineCompletionPos()
3013 {
3014         d->inlineCompletionPos_ = DocIterator();
3015 }
3016
3017
3018 bool samePar(DocIterator const & a, DocIterator const & b)
3019 {
3020         if (a.empty() && b.empty())
3021                 return true;
3022         if (a.empty() || b.empty())
3023                 return false;
3024         if (a.depth() != b.depth())
3025                 return false;
3026         return &a.innerParagraph() == &b.innerParagraph();
3027 }
3028
3029
3030 void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
3031         docstring const & completion, size_t uniqueChars)
3032 {
3033         uniqueChars = min(completion.size(), uniqueChars);
3034         bool changed = d->inlineCompletion_ != completion
3035                 || d->inlineCompletionUniqueChars_ != uniqueChars;
3036         bool singlePar = true;
3037         d->inlineCompletion_ = completion;
3038         d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
3039
3040         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
3041
3042         // at new position?
3043         DocIterator const & old = d->inlineCompletionPos_;
3044         if (old != pos) {
3045                 //lyxerr << "inlineCompletionPos changed" << std::endl;
3046                 // old or pos are in another paragraph?
3047                 if ((!samePar(cur, pos) && !pos.empty())
3048                     || (!samePar(cur, old) && !old.empty())) {
3049                         singlePar = false;
3050                         //lyxerr << "different paragraph" << std::endl;
3051                 }
3052                 d->inlineCompletionPos_ = pos;
3053         }
3054
3055         // set update flags
3056         if (changed) {
3057                 if (singlePar && !(cur.result().screenUpdate() & Update::Force))
3058                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
3059                 else
3060                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::Force);
3061         }
3062 }
3063
3064
3065 bool BufferView::clickableInset() const
3066 {
3067         return d->clickable_inset_;
3068 }
3069
3070 } // namespace lyx