src/BufferView_pimpl.C

   1 /**
   2  * \file BufferView_pimpl.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Asger Alstrup
   7  * \author Alfredo Braunstein
   8  * \author Lars Gullik Bjønnes
   9  * \author Jean-Marc Lasgouttes
  10  * \author Angus Leeming
  11  * \author John Levon
  12  * \author André Pönitz
  13  * \author Dekel Tsur
  14  * \author Jürgen Vigna
  15  *
  16  * Full author contact details are available in file CREDITS.
  17  */
  18
  19 #include <config.h>
  20
  21 #include "BufferView_pimpl.h"
  22 #include "buffer.h"
  23 #include "buffer_funcs.h"
  24 #include "bufferlist.h"
  25 #include "bufferparams.h"
  26 #include "coordcache.h"
  27 #include "cursor.h"
  28 #include "CutAndPaste.h"
  29 #include "debug.h"
  30 #include "dispatchresult.h"
  31 #include "factory.h"
  32 #include "FloatList.h"
  33 #include "funcrequest.h"
  34 #include "FuncStatus.h"
  35 #include "gettext.h"
  36 #include "intl.h"
  37 #include "insetiterator.h"
  38 #include "LaTeXFeatures.h"
  39 #include "lyx_cb.h" // added for Dispatch functions
  40 #include "lyx_main.h"
  41 #include "lyxfind.h"
  42 #include "lyxfunc.h"
  43 #include "lyxtext.h"
  44 #include "lyxrc.h"
  45 #include "session.h"
  46 #include "metricsinfo.h"
  47 #include "paragraph.h"
  48 #include "paragraph_funcs.h"
  49 #include "ParagraphParameters.h"
  50 #include "pariterator.h"
  51 #include "rowpainter.h"
  52 #include "toc.h"
  53 #include "undo.h"
  54 #include "vspace.h"
  55
  56 #include "insets/insetbibtex.h"
  57 #include "insets/insetref.h"
  58 #include "insets/insettext.h"
  59
  60 #include "frontends/Alert.h"
  61 #include "frontends/Clipboard.h"
  62 #include "frontends/Dialogs.h"
  63 #include "frontends/FileDialog.h"
  64 #include "frontends/font_metrics.h"
  65 #include "frontends/Gui.h"
  66 #include "frontends/LyXView.h"
  67 #include "frontends/WorkArea.h"
  68
  69 #include "graphics/Previews.h"
  70
  71 #include "support/convert.h"
  72 #include "support/filefilterlist.h"
  73 #include "support/filetools.h"
  74 #include "support/forkedcontr.h"
  75 #include "support/package.h"
  76 #include "support/types.h"
  77
  78 #include <boost/bind.hpp>
  79 #include <boost/current_function.hpp>
  80
  81 #include <functional>
  82 #include <vector>
  83
  84 using lyx::frontend::WorkArea;
  85 using lyx::frontend::Clipboard;
  86 using lyx::frontend::Gui;
  87
  88 using lyx::pos_type;
  89
  90 using lyx::support::addPath;
  91 using lyx::support::bformat;
  92 using lyx::support::FileFilterList;
  93 using lyx::support::fileSearch;
  94 using lyx::support::ForkedcallsController;
  95 using lyx::support::isDirWriteable;
  96 using lyx::support::makeDisplayPath;
  97 using lyx::support::makeAbsPath;
  98 using lyx::support::package;
  99
 100 using std::endl;
 101 using std::istringstream;
 102 using std::make_pair;
 103 using std::min;
 104 using std::max;
 105 using std::string;
 106 using std::mem_fun_ref;
 107 using std::vector;
 108
 109 extern BufferList bufferlist;
 110
 111
 112 namespace {
 113
 114 unsigned int const saved_positions_num = 20;
 115
 116 // All the below connection objects are needed because of a bug in some
 117 // versions of GCC (<=2.96 are on the suspects list.) By having and assigning
 118 // to these connections we avoid a segfault upon startup, and also at exit.
 119 // (Lgb)
 120
 121 boost::signals::connection timecon;
 122
 123 /// Return an inset of this class if it exists at the current cursor position
 124 template <class T>
 125 T * getInsetByCode(LCursor & cur, InsetBase::Code code)
 126 {
 127         T * inset = 0;
 128         DocIterator it = cur;
 129         if (it.nextInset() &&
 130             it.nextInset()->lyxCode() == code) {
 131                 inset = static_cast<T*>(it.nextInset());
 132         }
 133         return inset;
 134 }
 135
 136 } // anon namespace
 137
 138
 139 BufferView::Pimpl::Pimpl(BufferView & bv, LyXView * owner)
 140         : bv_(&bv), owner_(owner), buffer_(0), wh_(0), cursor_timeout(400),
 141           using_xterm_cursor(false), cursor_(bv),
 142           multiparsel_cache_(false), anchor_ref_(0), offset_ref_(0)
 143 {
 144         xsel_cache_.set = false;
 145
 146         // Setup the signals
 147         timecon = cursor_timeout.timeout
 148                 .connect(boost::bind(&BufferView::Pimpl::cursorToggle, this));
 149
 150         cursor_timeout.start();
 151
 152         saved_positions.resize(saved_positions_num);
 153         // load saved bookmarks
 154         lyx::Session::BookmarkList & bmList = LyX::ref().session().loadBookmarks();
 155         for (lyx::Session::BookmarkList::iterator bm = bmList.begin();
 156                 bm != bmList.end(); ++bm)
 157                 if (bm->get<0>() < saved_positions_num)
 158                         saved_positions[bm->get<0>()] = Position( bm->get<1>(), bm->get<2>(), bm->get<3>() );
 159         // and then clear them
 160         bmList.clear();
 161 }
 162
 163
 164 void BufferView::Pimpl::addError(ErrorItem const & ei)
 165 {
 166         errorlist_.push_back(ei);
 167 }
 168
 169
 170 void BufferView::Pimpl::showReadonly(bool)
 171 {
 172         owner_->updateWindowTitle();
 173         owner_->getDialogs().updateBufferDependent(false);
 174 }
 175
 176
 177 void BufferView::Pimpl::connectBuffer(Buffer & buf)
 178 {
 179         if (errorConnection_.connected())
 180                 disconnectBuffer();
 181
 182         errorConnection_ =
 183                 buf.error.connect(
 184                         boost::bind(&BufferView::Pimpl::addError, this, _1));
 185
 186         messageConnection_ =
 187                 buf.message.connect(
 188                         boost::bind(&LyXView::message, owner_, _1));
 189
 190         busyConnection_ =
 191                 buf.busy.connect(
 192                         boost::bind(&LyXView::busy, owner_, _1));
 193
 194         titleConnection_ =
 195                 buf.updateTitles.connect(
 196                         boost::bind(&LyXView::updateWindowTitle, owner_));
 197
 198         timerConnection_ =
 199                 buf.resetAutosaveTimers.connect(
 200                         boost::bind(&LyXView::resetAutosaveTimer, owner_));
 201
 202         readonlyConnection_ =
 203                 buf.readonly.connect(
 204                         boost::bind(&BufferView::Pimpl::showReadonly, this, _1));
 205
 206         closingConnection_ =
 207                 buf.closing.connect(
 208                         boost::bind(&BufferView::Pimpl::setBuffer, this, (Buffer *)0));
 209 }
 210
 211
 212 void BufferView::Pimpl::disconnectBuffer()
 213 {
 214         errorConnection_.disconnect();
 215         messageConnection_.disconnect();
 216         busyConnection_.disconnect();
 217         titleConnection_.disconnect();
 218         timerConnection_.disconnect();
 219         readonlyConnection_.disconnect();
 220         closingConnection_.disconnect();
 221 }
 222
 223
 224 void BufferView::Pimpl::newFile(string const & filename, string const & tname,
 225         bool isNamed)
 226 {
 227         setBuffer(::newFile(filename, tname, isNamed));
 228 }
 229
 230
 231 bool BufferView::Pimpl::loadLyXFile(string const & filename, bool tolastfiles)
 232 {
 233         // Get absolute path of file and add ".lyx"
 234         // to the filename if necessary
 235         string s = fileSearch(string(), filename, "lyx");
 236
 237         bool const found = !s.empty();
 238
 239         if (!found)
 240                 s = filename;
 241
 242         // File already open?
 243         if (bufferlist.exists(s)) {
 244                 string const file = makeDisplayPath(s, 20);
 245                 string text = bformat(_("The document %1$s is already "
 246                                         "loaded.\n\nDo you want to revert "
 247                                         "to the saved version?"), file);
 248                 int const ret = Alert::prompt(_("Revert to saved document?"),
 249                         text, 0, 1,  _("&Revert"), _("&Switch to document"));
 250
 251                 if (ret != 0) {
 252                         setBuffer(bufferlist.getBuffer(s));
 253                         return true;
 254                 }
 255                 // FIXME: should be LFUN_REVERT
 256                 if (!bufferlist.close(bufferlist.getBuffer(s), false))
 257                         return false;
 258                 // Fall through to new load. (Asger)
 259         }
 260
 261         Buffer * b = 0;
 262
 263         if (found) {
 264                 b = bufferlist.newBuffer(s);
 265                 connectBuffer(*b);
 266                 if (!::loadLyXFile(b, s)) {
 267                         bufferlist.release(b);
 268                         return false;
 269                 }
 270         } else {
 271                 string text = bformat(_("The document %1$s does not yet "
 272                                         "exist.\n\nDo you want to create "
 273                                         "a new document?"), s);
 274                 int const ret = Alert::prompt(_("Create new document?"),
 275                          text, 0, 1, _("&Create"), _("Cancel"));
 276
 277                 if (ret == 0)
 278                         b = ::newFile(s, string(), true);
 279                 else
 280                         return false;
 281         }
 282
 283         setBuffer(b);
 284         bv_->showErrorList(_("Parse"));
 285
 286         // scroll to the position when the file was last closed
 287         if (lyxrc.use_lastfilepos) {
 288                 lyx::pit_type pit;
 289                 lyx::pos_type pos;
 290                 boost::tie(pit, pos) = LyX::ref().session().loadFilePosition(s);
 291                 // I am not sure how to separate the following part to a function
 292                 // so I will leave this to Lars.
 293                 //
 294                 // check pit since the document may be externally changed.
 295                 if ( static_cast<size_t>(pit) < b->paragraphs().size() ) {
 296                         ParIterator it = b->par_iterator_begin();
 297                         ParIterator const end = b->par_iterator_end();
 298                         for (; it != end; ++it)
 299                                 if (it.pit() == pit) {
 300                                         // restored pos may be bigger than it->size
 301                                         bv_->setCursor(makeDocIterator(it, min(pos, it->size())));
 302                                         bv_->update(Update::FitCursor);
 303                                         break;
 304                                 }
 305                 }
 306         }
 307
 308         if (tolastfiles)
 309                 LyX::ref().session().addLastFile(b->fileName());
 310
 311         return true;
 312 }
 313
 314
 315 lyx::frontend::Gui & BufferView::Pimpl::gui() const
 316 {
 317         return owner_->gui();
 318 }
 319
 320
 321 int BufferView::Pimpl::width() const
 322 {
 323         return width_;
 324 }
 325
 326
 327 int BufferView::Pimpl::height() const
 328 {
 329         return height_;
 330 }
 331
 332
 333 void BufferView::Pimpl::setBuffer(Buffer * b)
 334 {
 335         lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 336                             << "[ b = " << b << "]" << endl;
 337
 338         if (buffer_) {
 339                 disconnectBuffer();
 340                 // Save the actual cursor position and anchor inside the
 341                 // buffer so that it can be restored in case we rechange
 342                 // to this buffer later on.
 343                 buffer_->saveCursor(cursor_.selectionBegin(),
 344                                     cursor_.selectionEnd());
 345                 // current buffer is going to be switched-off, save cursor pos
 346                 LyX::ref().session().saveFilePosition(buffer_->fileName(),
 347                         boost::tie(cursor_.pit(), cursor_.pos()) );
 348         }
 349
 350         // If we are closing current buffer, switch to the first in
 351         // buffer list.
 352         if (!b) {
 353                 lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 354                                     << " No Buffer!" << endl;
 355                 // We are closing the buffer, use the first buffer as current
 356                 buffer_ = bufferlist.first();
 357                 owner_->getDialogs().hideBufferDependent();
 358         } else {
 359                 // Set current buffer
 360                 buffer_ = b;
 361         }
 362
 363         // Reset old cursor
 364         cursor_ = LCursor(*bv_);
 365         anchor_ref_ = 0;
 366         offset_ref_ = 0;
 367
 368
 369         // If we're quitting lyx, don't bother updating stuff
 370         if (quitting)
 371                 return;
 372
 373         if (buffer_) {
 374                 lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 375                                     << "Buffer addr: " << buffer_ << endl;
 376                 connectBuffer(*buffer_);
 377                 cursor_.push(buffer_->inset());
 378                 cursor_.resetAnchor();
 379                 buffer_->text().init(bv_);
 380                 buffer_->text().setCurrentFont(cursor_);
 381                 if (buffer_->getCursor().size() > 0 &&
 382                     buffer_->getAnchor().size() > 0)
 383                 {
 384                         cursor_.setCursor(buffer_->getAnchor().asDocIterator(&(buffer_->inset())));
 385                         cursor_.resetAnchor();
 386                         cursor_.setCursor(buffer_->getCursor().asDocIterator(&(buffer_->inset())));
 387                         cursor_.setSelection();
 388                 }
 389
 390                 // Buffer-dependent dialogs should be updated or
 391                 // hidden. This should go here because some dialogs (eg ToC)
 392                 // require bv_->text.
 393                 owner_->getDialogs().updateBufferDependent(true);
 394         }
 395
 396         update();
 397         owner_->updateMenubar();
 398         owner_->updateToolbars();
 399         owner_->updateLayoutChoice();
 400         owner_->updateWindowTitle();
 401
 402         // This is done after the layout combox has been populated
 403         if (buffer_) {
 404                 size_t i = cursor_.depth() - 1;
 405                 // we know we'll eventually find a paragraph
 406                 while (true) {
 407                         CursorSlice const & slice = cursor_[i];
 408                         if (!slice.inset().inMathed()) {
 409                                 LyXLayout_ptr const layout = slice.paragraph().layout();
 410                                 owner_->setLayout(layout->name());
 411                                 break;
 412                         }
 413                         BOOST_ASSERT(i>0);
 414                         --i;
 415                 }
 416         }
 417
 418         if (buffer_ && lyx::graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 419                 lyx::graphics::Previews::get().generateBufferPreviews(*buffer_);
 420 }
 421
 422
 423 void BufferView::Pimpl::resizeCurrentBuffer()
 424 {
 425         lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION << endl;
 426         owner_->busy(true);
 427         owner_->message(_("Formatting document..."));
 428
 429         LyXText * text = bv_->text();
 430         if (!text)
 431                 return;
 432
 433         text->init(bv_);
 434         update();
 435
 436         switchKeyMap();
 437         owner_->busy(false);
 438
 439         // Reset the "Formatting..." message
 440         owner_->clearMessage();
 441 }
 442
 443
 444 void BufferView::Pimpl::updateScrollbar()
 445 {
 446         if (!bv_->text()) {
 447                 lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION
 448                                      << " no text in updateScrollbar" << endl;
 449                 scrollbarParameters_.reset();
 450                 return;
 451         }
 452
 453         LyXText & t = *bv_->text();
 454         int const parsize = int(t.paragraphs().size() - 1);
 455         if (anchor_ref_ >  parsize)  {
 456                 anchor_ref_ = parsize;
 457                 offset_ref_ = 0;
 458         }
 459
 460         lyxerr[Debug::GUI]
 461                 << BOOST_CURRENT_FUNCTION
 462                 << " Updating scrollbar: height: " << t.paragraphs().size()
 463                 << " curr par: " << cursor_.bottom().pit()
 464                 << " default height " << defaultRowHeight() << endl;
 465
 466         // It would be better to fix the scrollbar to understand
 467         // values in [0..1] and divide everything by wh
 468
 469         // estimated average paragraph height:
 470         if (wh_ == 0)
 471                 wh_ = height_ / 4;
 472         int h = t.getPar(anchor_ref_).height();
 473
 474         // Normalize anchor/offset (MV):
 475         while (offset_ref_ > h && anchor_ref_ < parsize) {
 476                 anchor_ref_++;
 477                 offset_ref_ -= h;
 478                 h = t.getPar(anchor_ref_).height();
 479         }
 480         // Look at paragraph heights on-screen
 481         int sumh = 0;
 482         int nh = 0;
 483         for (lyx::pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 484                 if (sumh > height_)
 485                         break;
 486                 int const h2 = t.getPar(pit).height();
 487                 sumh += h2;
 488                 nh++;
 489         }
 490         int const hav = sumh / nh;
 491         // More realistic average paragraph height
 492         if (hav > wh_)
 493                 wh_ = hav;
 494
 495         scrollbarParameters_.height = (parsize + 1) * wh_;
 496         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 497         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 498 }
 499
 500
 501 ScrollbarParameters const & BufferView::Pimpl::scrollbarParameters() const
 502 {
 503         return scrollbarParameters_;
 504 }
 505
 506
 507 void BufferView::Pimpl::scrollDocView(int value)
 508 {
 509         lyxerr[Debug::GUI] << BOOST_CURRENT_FUNCTION
 510                            << "[ value = " << value << "]" << endl;
 511
 512         if (!buffer_)
 513                 return;
 514
 515         owner_->gui().guiCursor().hide();
 516
 517         LyXText & t = *bv_->text();
 518
 519         float const bar = value / float(wh_ * t.paragraphs().size());
 520
 521         anchor_ref_ = int(bar * t.paragraphs().size());
 522         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 523                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 524         t.redoParagraph(anchor_ref_);
 525         int const h = t.getPar(anchor_ref_).height();
 526         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 527         update();
 528
 529         if (!lyxrc.cursor_follows_scrollbar)
 530                 return;
 531
 532         int const height = 2 * defaultRowHeight();
 533         int const first = height;
 534         int const last = height_ - height;
 535         LCursor & cur = cursor_;
 536
 537         bv_funcs::CurStatus st = bv_funcs::status(bv_, cur);
 538
 539         switch (st) {
 540         case bv_funcs::CUR_ABOVE:
 541                 t.setCursorFromCoordinates(cur, 0, first);
 542                 cur.clearSelection();
 543                 break;
 544         case bv_funcs::CUR_BELOW:
 545                 t.setCursorFromCoordinates(cur, 0, last);
 546                 cur.clearSelection();
 547                 break;
 548         case bv_funcs::CUR_INSIDE:
 549                 int const y = bv_funcs::getPos(cur, cur.boundary()).y_;
 550                 int const newy = min(last, max(y, first));
 551                 if (y != newy) {
 552                         cur.reset(buffer_->inset());
 553                         t.setCursorFromCoordinates(cur, 0, newy);
 554                 }
 555         }
 556         owner_->updateLayoutChoice();
 557 }
 558
 559
 560 void BufferView::Pimpl::scroll(int /*lines*/)
 561 {
 562 //      if (!buffer_)
 563 //              return;
 564 //
 565 //      LyXText const * t = bv_->text();
 566 //      int const line_height = defaultRowHeight();
 567 //
 568 //      // The new absolute coordinate
 569 //      int new_top_y = top_y() + lines * line_height;
 570 //
 571 //      // Restrict to a valid value
 572 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
 573 //      new_top_y = std::max(0, new_top_y);
 574 //
 575 //      scrollDocView(new_top_y);
 576 //
 577 //      // Update the scrollbar.
 578 //      workArea_->setScrollbarParams(t->height(), top_y(), defaultRowHeight());
 579 }
 580
 581
 582 void BufferView::Pimpl::workAreaKeyPress(LyXKeySymPtr key,
 583                                          key_modifier::state state)
 584 {
 585         owner_->getLyXFunc().processKeySym(key, state);
 586
 587         /* This is perhaps a bit of a hack. When we move
 588          * around, or type, it's nice to be able to see
 589          * the cursor immediately after the keypress. So
 590          * we reset the toggle timeout and force the visibility
 591          * of the cursor. Note we cannot do this inside
 592          * dispatch() itself, because that's called recursively.
 593          */
 594         if (available())
 595                 owner_->gui().guiCursor().show(*bv_);
 596 }
 597
 598
 599 void BufferView::Pimpl::selectionRequested()
 600 {
 601         static string sel;
 602
 603         if (!available())
 604                 return;
 605
 606         LCursor & cur = cursor_;
 607
 608         if (!cur.selection()) {
 609                 xsel_cache_.set = false;
 610                 return;
 611         }
 612
 613         if (!xsel_cache_.set ||
 614             cur.top() != xsel_cache_.cursor ||
 615             cur.anchor_.top() != xsel_cache_.anchor)
 616         {
 617                 xsel_cache_.cursor = cur.top();
 618                 xsel_cache_.anchor = cur.anchor_.top();
 619                 xsel_cache_.set = cur.selection();
 620                 sel = cur.selectionAsString(false);
 621                 if (!sel.empty())
 622                         owner_->gui().clipboard().put(sel);
 623         }
 624 }
 625
 626
 627 void BufferView::Pimpl::selectionLost()
 628 {
 629         if (available()) {
 630                 owner_->gui().guiCursor().hide();
 631                 cursor_.clearSelection();
 632                 xsel_cache_.set = false;
 633         }
 634 }
 635
 636
 637 void BufferView::Pimpl::workAreaResize(int width, int height)
 638 {
 639         bool const widthChange = width != width_;
 640         bool const heightChange = height != height_;
 641
 642         // Update from work area
 643         width_ = width;
 644         height_ = height;
 645
 646         if (buffer_ && widthChange) {
 647                 // The visible LyXView need a resize
 648                 resizeCurrentBuffer();
 649         }
 650
 651         if (widthChange || heightChange)
 652                 update();
 653
 654         owner_->updateLayoutChoice();
 655 }
 656
 657
 658 bool BufferView::Pimpl::fitCursor()
 659 {
 660         if (bv_funcs::status(bv_, cursor_) == bv_funcs::CUR_INSIDE) {
 661                 LyXFont const font = cursor_.getFont();
 662                 int const asc = font_metrics::maxAscent(font);
 663                 int const des = font_metrics::maxDescent(font);
 664                 Point const p = bv_funcs::getPos(cursor_, cursor_.boundary());
 665                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 666                         return false;
 667         }
 668         center();
 669         return true;
 670 }
 671
 672
 673 bool BufferView::Pimpl::multiParSel()
 674 {
 675         if (!cursor_.selection())
 676                 return false;
 677         bool ret = multiparsel_cache_;
 678         multiparsel_cache_ = cursor_.selBegin().pit() != cursor_.selEnd().pit();
 679         // Either this, or previous selection spans paragraphs
 680         return ret || multiparsel_cache_;
 681 }
 682
 683
 684 ViewMetricsInfo const & BufferView::Pimpl::viewMetricsInfo()
 685 {
 686         return metrics_info_;
 687 }
 688
 689
 690 void BufferView::Pimpl::update(Update::flags flags)
 691 {
 692         // This is close to a hot-path.
 693         if (lyxerr.debugging(Debug::DEBUG)) {
 694                 lyxerr[Debug::DEBUG]
 695                         << BOOST_CURRENT_FUNCTION
 696                         << "[fitcursor = " << (flags & Update::FitCursor)
 697                         << ", forceupdate = " << (flags & Update::Force)
 698                         << ", singlepar = " << (flags & Update::SinglePar)
 699                         << "]  buffer: " << buffer_ << endl;
 700         }
 701
 702         // Check needed to survive LyX startup
 703         if (buffer_) {
 704                 // Update macro store
 705                 buffer_->buildMacros();
 706
 707                 // This, together with doneUpdating(), verifies (using
 708                 // asserts) that screen redraw is not called from
 709                 // within itself.
 710                 theCoords.startUpdating();
 711
 712                 // First drawing step
 713                 bool singlePar = flags & Update::SinglePar;
 714                 bool forceupdate(flags & (Update::Force | Update::SinglePar));
 715
 716                 if ((flags & (Update::FitCursor | Update::MultiParSel))
 717                     && (fitCursor() || multiParSel())) {
 718                         forceupdate = true;
 719                         singlePar = false;
 720                 }
 721
 722                 if (forceupdate) {
 723                         // Second drawing step
 724                         updateMetrics(singlePar);
 725                         owner_->workArea()->redraw(*bv_);
 726                 } else {
 727                         // Abort updating of the coord
 728                         // cache - just restore the old one
 729                         theCoords.doneUpdating();
 730                 }
 731         } else
 732                 owner_->workArea()->greyOut();
 733
 734         owner_->view_state_changed();
 735 }
 736
 737
 738 // Callback for cursor timer
 739 void BufferView::Pimpl::cursorToggle()
 740 {
 741         if (buffer_) {
 742                 owner_->gui().guiCursor().toggle(*bv_);
 743
 744                 // Use this opportunity to deal with any child processes that
 745                 // have finished but are waiting to communicate this fact
 746                 // to the rest of LyX.
 747                 ForkedcallsController & fcc = ForkedcallsController::get();
 748                 fcc.handleCompletedProcesses();
 749         }
 750
 751         cursor_timeout.restart();
 752 }
 753
 754
 755 bool BufferView::Pimpl::available() const
 756 {
 757         return buffer_ && bv_->text();
 758 }
 759
 760
 761 Change const BufferView::Pimpl::getCurrentChange()
 762 {
 763         if (!buffer_->params().tracking_changes)
 764                 return Change(Change::UNCHANGED);
 765
 766         LyXText * text = bv_->getLyXText();
 767         LCursor & cur = cursor_;
 768
 769         if (!cur.selection())
 770                 return Change(Change::UNCHANGED);
 771
 772         return text->getPar(cur.selBegin().pit()).
 773                         lookupChange(cur.selBegin().pos());
 774 }
 775
 776
 777 void BufferView::Pimpl::savePosition(unsigned int i)
 778 {
 779         if (i >= saved_positions_num)
 780                 return;
 781         BOOST_ASSERT(cursor_.inTexted());
 782         saved_positions[i] = Position(buffer_->fileName(),
 783                                       cursor_.paragraph().id(),
 784                                       cursor_.pos());
 785         if (i > 0)
 786                 owner_->message(bformat(_("Saved bookmark %1$d"), i));
 787 }
 788
 789
 790 void BufferView::Pimpl::restorePosition(unsigned int i)
 791 {
 792         if (i >= saved_positions_num)
 793                 return;
 794
 795         string const fname = saved_positions[i].filename;
 796
 797         cursor_.clearSelection();
 798
 799         if (fname != buffer_->fileName()) {
 800                 Buffer * b = 0;
 801                 if (bufferlist.exists(fname))
 802                         b = bufferlist.getBuffer(fname);
 803                 else {
 804                         b = bufferlist.newBuffer(fname);
 805                         // Don't ask, just load it
 806                         ::loadLyXFile(b, fname);
 807                 }
 808                 if (b)
 809                         setBuffer(b);
 810         }
 811
 812         ParIterator par = buffer_->getParFromID(saved_positions[i].par_id);
 813         if (par == buffer_->par_iterator_end())
 814                 return;
 815
 816         bv_->setCursor(makeDocIterator(par, min(par->size(), saved_positions[i].par_pos)));
 817
 818         if (i > 0)
 819                 owner_->message(bformat(_("Moved to bookmark %1$d"), i));
 820 }
 821
 822
 823 bool BufferView::Pimpl::isSavedPosition(unsigned int i)
 824 {
 825         return i < saved_positions_num && !saved_positions[i].filename.empty();
 826 }
 827
 828
 829 void BufferView::Pimpl::saveSavedPositions()
 830 {
 831         // save bookmarks. It is better to use the pit interface
 832         // but I do not know how to effectively convert between
 833         // par_id and pit.
 834         for (unsigned int i=1; i < saved_positions_num; ++i) {
 835                 if ( isSavedPosition(i) )
 836                         LyX::ref().session().saveBookmark( boost::tie(
 837                                 i,
 838                                 saved_positions[i].filename,
 839                                 saved_positions[i].par_id,
 840                                 saved_positions[i].par_pos) );
 841         }
 842 }
 843
 844
 845 void BufferView::Pimpl::switchKeyMap()
 846 {
 847         if (!lyxrc.rtl_support)
 848                 return;
 849
 850         Intl & intl = owner_->getIntl();
 851         if (bv_->getLyXText()->real_current_font.isRightToLeft()) {
 852                 if (intl.keymap == Intl::PRIMARY)
 853                         intl.keyMapSec();
 854         } else {
 855                 if (intl.keymap == Intl::SECONDARY)
 856                         intl.keyMapPrim();
 857         }
 858 }
 859
 860
 861 void BufferView::Pimpl::center()
 862 {
 863         CursorSlice & bot = cursor_.bottom();
 864         lyx::pit_type const pit = bot.pit();
 865         bot.text()->redoParagraph(pit);
 866         Paragraph const & par = bot.text()->paragraphs()[pit];
 867         anchor_ref_ = pit;
 868         offset_ref_ = bv_funcs::coordOffset(cursor_, cursor_.boundary()).y_
 869                 + par.ascent() - height_ / 2;
 870 }
 871
 872
 873
 874 void BufferView::Pimpl::menuInsertLyXFile(string const & filenm)
 875 {
 876         BOOST_ASSERT(cursor_.inTexted());
 877         string filename = filenm;
 878
 879         if (filename.empty()) {
 880                 // Launch a file browser
 881                 string initpath = lyxrc.document_path;
 882
 883                 if (available()) {
 884                         string const trypath = owner_->buffer()->filePath();
 885                         // If directory is writeable, use this as default.
 886                         if (isDirWriteable(trypath))
 887                                 initpath = trypath;
 888                 }
 889
 890                 FileDialog fileDlg(_("Select LyX document to insert"),
 891                         LFUN_FILE_INSERT,
 892                         make_pair(string(_("Documents|#o#O")),
 893                                   string(lyxrc.document_path)),
 894                         make_pair(string(_("Examples|#E#e")),
 895                                   string(addPath(package().system_support(), "examples"))));
 896
 897                 FileDialog::Result result =
 898                         fileDlg.open(initpath,
 899                                      FileFilterList(_("LyX Documents (*.lyx)")),
 900                                      string());
 901
 902                 if (result.first == FileDialog::Later)
 903                         return;
 904
 905                 filename = result.second;
 906
 907                 // check selected filename
 908                 if (filename.empty()) {
 909                         owner_->message(_("Canceled."));
 910                         return;
 911                 }
 912         }
 913
 914         // Get absolute path of file and add ".lyx"
 915         // to the filename if necessary
 916         filename = fileSearch(string(), filename, "lyx");
 917
 918         string const disp_fn = makeDisplayPath(filename);
 919         owner_->message(bformat(_("Inserting document %1$s..."), disp_fn));
 920
 921         string res;
 922         Buffer buf("", false);
 923         buf.error.connect(boost::bind(&BufferView::Pimpl::addError, this, _1));
 924         if (::loadLyXFile(&buf, makeAbsPath(filename))) {
 925                 lyx::cap::pasteParagraphList(cursor_, buf.paragraphs(),
 926                                              buf.params().textclass);
 927                 res = _("Document %1$s inserted.");
 928         } else
 929                 res = _("Could not insert document %1$s");
 930
 931         owner_->message(bformat(res, disp_fn));
 932         bv_->showErrorList(_("Document insertion"));
 933         resizeCurrentBuffer();
 934 }
 935
 936
 937 void BufferView::Pimpl::trackChanges()
 938 {
 939         bool const tracking = buffer_->params().tracking_changes;
 940
 941         if (!tracking) {
 942                 for_each(buffer_->par_iterator_begin(),
 943                          buffer_->par_iterator_end(),
 944                          bind(&Paragraph::trackChanges, _1, Change::UNCHANGED));
 945                 buffer_->params().tracking_changes = true;
 946
 947                 // We cannot allow undos beyond the freeze point
 948                 buffer_->undostack().clear();
 949         } else {
 950                 cursor_.setCursor(doc_iterator_begin(buffer_->inset()));
 951                 if (lyx::find::findNextChange(bv_)) {
 952                         owner_->getDialogs().show("changes");
 953                         return;
 954                 }
 955
 956                 for_each(buffer_->par_iterator_begin(),
 957                          buffer_->par_iterator_end(),
 958                          mem_fun_ref(&Paragraph::untrackChanges));
 959
 960                 buffer_->params().tracking_changes = false;
 961         }
 962
 963         buffer_->redostack().clear();
 964 }
 965
 966
 967 bool BufferView::Pimpl::workAreaDispatch(FuncRequest const & cmd0)
 968 {
 969         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
 970
 971         // This is only called for mouse related events including
 972         // LFUN_FILE_OPEN generated by drag-and-drop.
 973         FuncRequest cmd = cmd0;
 974
 975         // Handle drag&drop
 976         if (cmd.action == LFUN_FILE_OPEN) {
 977                 owner_->dispatch(cmd);
 978                 return true;
 979         }
 980
 981         if (!buffer_)
 982                 return false;
 983
 984         LCursor cur(*bv_);
 985         cur.push(buffer_->inset());
 986         cur.selection() = cursor_.selection();
 987
 988         // Doesn't go through lyxfunc, so we need to update
 989         // the layout choice etc. ourselves
 990
 991         // E.g. Qt mouse press when no buffer
 992         if (!available())
 993                 return false;
 994
 995         owner_->gui().guiCursor().hide();
 996
 997         // Either the inset under the cursor or the
 998         // surrounding LyXText will handle this event.
 999
1000         // Build temporary cursor.
1001         cmd.y = min(max(cmd.y, -1), height_);
1002         InsetBase * inset = bv_->text()->editXY(cur, cmd.x, cmd.y);
1003         //lyxerr << BOOST_CURRENT_FUNCTION
1004         //       << " * hit inset at tip: " << inset << endl;
1005         //lyxerr << BOOST_CURRENT_FUNCTION
1006         //       << " * created temp cursor:" << cur << endl;
1007
1008         // Put anchor at the same position.
1009         cur.resetAnchor();
1010
1011         // Try to dispatch to an non-editable inset near this position
1012         // via the temp cursor. If the inset wishes to change the real
1013         // cursor it has to do so explicitly by using
1014         //  cur.bv().cursor() = cur;  (or similar)
1015         if (inset)
1016                 inset->dispatch(cur, cmd);
1017
1018         // Now dispatch to the temporary cursor. If the real cursor should
1019         // be modified, the inset's dispatch has to do so explicitly.
1020         if (!cur.result().dispatched())
1021                 cur.dispatch(cmd);
1022
1023         if (cur.result().dispatched()) {
1024                 // Redraw if requested or necessary.
1025                 if (cur.result().update())
1026                         update(Update::FitCursor | Update::Force);
1027                 else
1028                         update(Update::FitCursor | Update::MultiParSel);
1029         }
1030
1031         // See workAreaKeyPress
1032         cursor_timeout.restart();
1033         owner_->gui().guiCursor().show(*bv_);
1034
1035         // Skip these when selecting
1036         if (cmd.action != LFUN_MOUSE_MOTION) {
1037                 owner_->updateLayoutChoice();
1038                 owner_->updateToolbars();
1039         }
1040
1041         // Slight hack: this is only called currently when we
1042         // clicked somewhere, so we force through the display
1043         // of the new status here.
1044         owner_->clearMessage();
1045         return true;
1046 }
1047
1048
1049 FuncStatus BufferView::Pimpl::getStatus(FuncRequest const & cmd)
1050 {
1051         FuncStatus flag;
1052
1053         switch (cmd.action) {
1054
1055         case LFUN_UNDO:
1056                 flag.enabled(!buffer_->undostack().empty());
1057                 break;
1058         case LFUN_REDO:
1059                 flag.enabled(!buffer_->redostack().empty());
1060                 break;
1061         case LFUN_FILE_INSERT:
1062         case LFUN_FILE_INSERT_ASCII_PARA:
1063         case LFUN_FILE_INSERT_ASCII:
1064         case LFUN_BOOKMARK_SAVE:
1065                 // FIXME: Actually, these LFUNS should be moved to LyXText
1066                 flag.enabled(cursor_.inTexted());
1067                 break;
1068         case LFUN_FONT_STATE:
1069         case LFUN_LABEL_INSERT:
1070         case LFUN_PARAGRAPH_GOTO:
1071         // FIXME handle non-trivially
1072         case LFUN_OUTLINE_UP:
1073         case LFUN_OUTLINE_DOWN:
1074         case LFUN_OUTLINE_IN:
1075         case LFUN_OUTLINE_OUT:
1076         case LFUN_ERROR_NEXT:
1077         case LFUN_NOTE_NEXT:
1078         case LFUN_REFERENCE_NEXT:
1079         case LFUN_WORD_FIND:
1080         case LFUN_WORD_REPLACE:
1081         case LFUN_MARK_OFF:
1082         case LFUN_MARK_ON:
1083         case LFUN_MARK_TOGGLE:
1084         case LFUN_SCREEN_RECENTER:
1085         case LFUN_BIBTEX_DATABASE_ADD:
1086         case LFUN_BIBTEX_DATABASE_DEL:
1087         case LFUN_WORDS_COUNT:
1088                 flag.enabled(true);
1089                 break;
1090
1091         case LFUN_LABEL_GOTO: {
1092                 flag.enabled(!cmd.argument.empty()
1093                     || getInsetByCode<InsetRef>(cursor_, InsetBase::REF_CODE));
1094                 break;
1095         }
1096
1097         case LFUN_BOOKMARK_GOTO:
1098                 flag.enabled(isSavedPosition(convert<unsigned int>(cmd.argument)));
1099                 break;
1100         case LFUN_CHANGES_TRACK:
1101                 flag.enabled(true);
1102                 flag.setOnOff(buffer_->params().tracking_changes);
1103                 break;
1104
1105         case LFUN_CHANGES_OUTPUT: {
1106                 OutputParams runparams;
1107                 LaTeXFeatures features(*buffer_, buffer_->params(), runparams);
1108                 flag.enabled(buffer_ && buffer_->params().tracking_changes
1109                         && features.isAvailable("dvipost"));
1110                 flag.setOnOff(buffer_->params().output_changes);
1111                 break;
1112         }
1113
1114         case LFUN_CHANGES_MERGE:
1115         case LFUN_CHANGE_ACCEPT: // what about these two
1116         case LFUN_CHANGE_REJECT: // what about these two
1117         case LFUN_ALL_CHANGES_ACCEPT:
1118         case LFUN_ALL_CHANGES_REJECT:
1119                 flag.enabled(buffer_ && buffer_->params().tracking_changes);
1120                 break;
1121
1122         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
1123                 flag.setOnOff(buffer_->params().compressed);
1124                 break;
1125         }
1126
1127         default:
1128                 flag.enabled(false);
1129         }
1130
1131         return flag;
1132 }
1133
1134
1135
1136 bool BufferView::Pimpl::dispatch(FuncRequest const & cmd)
1137 {
1138         //lyxerr << BOOST_CURRENT_FUNCTION
1139         //       << [ cmd = " << cmd << "]" << endl;
1140
1141         // Make sure that the cached BufferView is correct.
1142         lyxerr[Debug::ACTION] << BOOST_CURRENT_FUNCTION
1143                 << " action[" << cmd.action << ']'
1144                 << " arg[" << cmd.argument << ']'
1145                 << " x[" << cmd.x << ']'
1146                 << " y[" << cmd.y << ']'
1147                 << " button[" << cmd.button() << ']'
1148                 << endl;
1149
1150         LCursor & cur = cursor_;
1151
1152         switch (cmd.action) {
1153
1154         case LFUN_UNDO:
1155                 if (available()) {
1156                         cur.message(_("Undo"));
1157                         cur.clearSelection();
1158                         if (!textUndo(*bv_))
1159                                 cur.message(_("No further undo information"));
1160                         update();
1161                         switchKeyMap();
1162                 }
1163                 break;
1164
1165         case LFUN_REDO:
1166                 if (available()) {
1167                         cur.message(_("Redo"));
1168                         cur.clearSelection();
1169                         if (!textRedo(*bv_))
1170                                 cur.message(_("No further redo information"));
1171                         update();
1172                         switchKeyMap();
1173                 }
1174                 break;
1175
1176         case LFUN_FILE_INSERT:
1177                 menuInsertLyXFile(cmd.argument);
1178                 break;
1179
1180         case LFUN_FILE_INSERT_ASCII_PARA:
1181                 insertAsciiFile(bv_, cmd.argument, true);
1182                 break;
1183
1184         case LFUN_FILE_INSERT_ASCII:
1185                 insertAsciiFile(bv_, cmd.argument, false);
1186                 break;
1187
1188         case LFUN_FONT_STATE:
1189                 cur.message(cur.currentState());
1190                 break;
1191
1192         case LFUN_BOOKMARK_SAVE:
1193                 savePosition(convert<unsigned int>(cmd.argument));
1194                 break;
1195
1196         case LFUN_BOOKMARK_GOTO:
1197                 restorePosition(convert<unsigned int>(cmd.argument));
1198                 break;
1199
1200         case LFUN_LABEL_GOTO: {
1201                 string label = cmd.argument;
1202                 if (label.empty()) {
1203                         InsetRef * inset =
1204                                 getInsetByCode<InsetRef>(cursor_,
1205                                                          InsetBase::REF_CODE);
1206                         if (inset) {
1207                                 label = inset->getContents();
1208                                 savePosition(0);
1209                         }
1210                 }
1211
1212                 if (!label.empty())
1213                         bv_->gotoLabel(label);
1214                 break;
1215         }
1216
1217         case LFUN_PARAGRAPH_GOTO: {
1218                 int const id = convert<int>(cmd.argument);
1219                 ParIterator par = buffer_->getParFromID(id);
1220                 if (par == buffer_->par_iterator_end()) {
1221                         lyxerr[Debug::INFO] << "No matching paragraph found! ["
1222                                             << id << ']' << endl;
1223                         break;
1224                 } else {
1225                         lyxerr[Debug::INFO] << "Paragraph " << par->id()
1226                                             << " found." << endl;
1227                 }
1228
1229                 // Set the cursor
1230                 bv_->setCursor(makeDocIterator(par, 0));
1231
1232                 update();
1233                 switchKeyMap();
1234                 break;
1235         }
1236
1237         case LFUN_OUTLINE_UP:
1238                 lyx::toc::outline(lyx::toc::Up, cursor_);
1239                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
1240                 updateLabels(*buffer_);
1241                 break;
1242         case LFUN_OUTLINE_DOWN:
1243                 lyx::toc::outline(lyx::toc::Down, cursor_);
1244                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
1245                 updateLabels(*buffer_);
1246                 break;
1247         case LFUN_OUTLINE_IN:
1248                 lyx::toc::outline(lyx::toc::In, cursor_);
1249                 updateLabels(*buffer_);
1250                 break;
1251         case LFUN_OUTLINE_OUT:
1252                 lyx::toc::outline(lyx::toc::Out, cursor_);
1253                 updateLabels(*buffer_);
1254                 break;
1255
1256         case LFUN_ERROR_NEXT:
1257                 bv_funcs::gotoInset(bv_, InsetBase::ERROR_CODE, false);
1258                 break;
1259
1260         case LFUN_NOTE_NEXT:
1261                 bv_funcs::gotoInset(bv_, InsetBase::NOTE_CODE, false);
1262                 break;
1263
1264         case LFUN_REFERENCE_NEXT: {
1265                 vector<InsetBase_code> tmp;
1266                 tmp.push_back(InsetBase::LABEL_CODE);
1267                 tmp.push_back(InsetBase::REF_CODE);
1268                 bv_funcs::gotoInset(bv_, tmp, true);
1269                 break;
1270         }
1271
1272         case LFUN_CHANGES_TRACK:
1273                 trackChanges();
1274                 break;
1275
1276         case LFUN_CHANGES_OUTPUT: {
1277                 bool const state = buffer_->params().output_changes;
1278                 buffer_->params().output_changes = !state;
1279                 break;
1280         }
1281
1282         case LFUN_CHANGES_MERGE:
1283                 if (lyx::find::findNextChange(bv_))
1284                         owner_->getDialogs().show("changes");
1285                 break;
1286
1287         case LFUN_ALL_CHANGES_ACCEPT: {
1288                 cursor_.reset(buffer_->inset());
1289 #ifdef WITH_WARNINGS
1290 #warning FIXME changes
1291 #endif
1292                 while (lyx::find::findNextChange(bv_))
1293                         bv_->getLyXText()->acceptChange(cursor_);
1294                 update();
1295                 break;
1296         }
1297
1298         case LFUN_ALL_CHANGES_REJECT: {
1299                 cursor_.reset(buffer_->inset());
1300 #ifdef WITH_WARNINGS
1301 #warning FIXME changes
1302 #endif
1303                 while (lyx::find::findNextChange(bv_))
1304                         bv_->getLyXText()->rejectChange(cursor_);
1305                 break;
1306         }
1307
1308         case LFUN_WORD_FIND:
1309                 lyx::find::find(bv_, cmd);
1310                 break;
1311
1312         case LFUN_WORD_REPLACE:
1313                 lyx::find::replace(bv_, cmd);
1314                 break;
1315
1316         case LFUN_MARK_OFF:
1317                 cur.clearSelection();
1318                 cur.resetAnchor();
1319                 cur.message(N_("Mark off"));
1320                 break;
1321
1322         case LFUN_MARK_ON:
1323                 cur.clearSelection();
1324                 cur.mark() = true;
1325                 cur.resetAnchor();
1326                 cur.message(N_("Mark on"));
1327                 break;
1328
1329         case LFUN_MARK_TOGGLE:
1330                 cur.clearSelection();
1331                 if (cur.mark()) {
1332                         cur.mark() = false;
1333                         cur.message(N_("Mark removed"));
1334                 } else {
1335                         cur.mark() = true;
1336                         cur.message(N_("Mark set"));
1337                 }
1338                 cur.resetAnchor();
1339                 break;
1340
1341         case LFUN_SCREEN_RECENTER:
1342                 center();
1343                 break;
1344
1345         case LFUN_BIBTEX_DATABASE_ADD: {
1346                 LCursor tmpcur = cursor_;
1347                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
1348                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1349                                                 InsetBase::BIBTEX_CODE);
1350                 if (inset) {
1351                         if (inset->addDatabase(cmd.argument))
1352                                 buffer_->updateBibfilesCache();
1353                 }
1354                 break;
1355         }
1356
1357         case LFUN_BIBTEX_DATABASE_DEL: {
1358                 LCursor tmpcur = cursor_;
1359                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
1360                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1361                                                 InsetBase::BIBTEX_CODE);
1362                 if (inset) {
1363                         if (inset->delDatabase(cmd.argument))
1364                                 buffer_->updateBibfilesCache();
1365                 }
1366                 break;
1367         }
1368
1369         case LFUN_WORDS_COUNT: {
1370                 DocIterator from, to;
1371                 if (cur.selection()) {
1372                         from = cur.selectionBegin();
1373                         to = cur.selectionEnd();
1374                 } else {
1375                         from = doc_iterator_begin(buffer_->inset());
1376                         to = doc_iterator_end(buffer_->inset());
1377                 }
1378                 int const count = countWords(from, to);
1379                 string message;
1380                 if (count != 1) {
1381                         if (cur.selection())
1382                                 message = bformat(_("%1$d words in selection."),
1383                                           count);
1384                                 else
1385                                         message = bformat(_("%1$d words in document."),
1386                                                           count);
1387                 }
1388                 else {
1389                         if (cur.selection())
1390                                 message = _("One word in selection.");
1391                         else
1392                                 message = _("One word in document.");
1393                 }
1394
1395                 Alert::information(_("Count words"), message);
1396         }
1397                 break;
1398
1399         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1400                 // turn compression on/off
1401                 buffer_->params().compressed = !buffer_->params().compressed;
1402                 break;
1403
1404         default:
1405                 return false;
1406         }
1407
1408         return true;
1409 }
1410
1411
1412 void BufferView::Pimpl::updateMetrics(bool singlepar)
1413 {
1414         // Remove old position cache
1415         theCoords.clear();
1416         BufferView & bv = *bv_;
1417         LyXText * const text = bv.text();
1418         lyx::pit_type size = int(text->paragraphs().size());
1419
1420         if (anchor_ref_ > int(text->paragraphs().size() - 1)) {
1421                 anchor_ref_ = int(text->paragraphs().size() - 1);
1422                 offset_ref_ = 0;
1423         }
1424
1425         lyx::pit_type const pit = anchor_ref_;
1426         int pit1 = pit;
1427         int pit2 = pit;
1428         size_t const npit = text->paragraphs().size();
1429
1430         // Rebreak anchor paragraph. In Single Paragraph mode, rebreak only
1431         // the (main text, not inset!) paragraph containing the cursor.
1432         // (if this paragraph contains insets etc., rebreaking will
1433         // recursively descend)
1434         if (!singlepar || pit == cursor_.bottom().pit())
1435                 text->redoParagraph(pit);
1436         int y0 = text->getPar(pit).ascent() - offset_ref_;
1437
1438         // Redo paragraphs above anchor if necessary; again, in Single Par
1439         // mode, only if we encounter the (main text) one having the cursor.
1440         int y1 = y0;
1441         while (y1 > 0 && pit1 > 0) {
1442                 y1 -= text->getPar(pit1).ascent();
1443                 --pit1;
1444                 if (!singlepar || pit1 == cursor_.bottom().pit())
1445                         text->redoParagraph(pit1);
1446                 y1 -= text->getPar(pit1).descent();
1447         }
1448
1449
1450         // Take care of ascent of first line
1451         y1 -= text->getPar(pit1).ascent();
1452
1453         // Normalize anchor for next time
1454         anchor_ref_ = pit1;
1455         offset_ref_ = -y1;
1456
1457         // Grey at the beginning is ugly
1458         if (pit1 == 0 && y1 > 0) {
1459                 y0 -= y1;
1460                 y1 = 0;
1461                 anchor_ref_ = 0;
1462         }
1463
1464         // Redo paragraphs below the anchor if necessary. Single par mode:
1465         // only the one containing the cursor if encountered.
1466         int y2 = y0;
1467         while (y2 < bv.workHeight() && pit2 < int(npit) - 1) {
1468                 y2 += text->getPar(pit2).descent();
1469                 ++pit2;
1470                 if (!singlepar || pit2 == cursor_.bottom().pit())
1471                         text->redoParagraph(pit2);
1472                 y2 += text->getPar(pit2).ascent();
1473         }
1474
1475         // Take care of descent of last line
1476         y2 += text->getPar(pit2).descent();
1477
1478         // The coordinates of all these paragraphs are correct, cache them
1479         int y = y1;
1480         for (lyx::pit_type pit = pit1; pit <= pit2; ++pit) {
1481                 y += text->getPar(pit).ascent();
1482                 theCoords.parPos()[text][pit] = Point(0, y);
1483                 if (singlepar && pit == cursor_.bottom().pit()) {
1484                         // In Single Paragraph mode, collect here the
1485                         // y1 and y2 of the (one) paragraph the cursor is in
1486                         y1 = y - text->getPar(pit).ascent();
1487                         y2 = y + text->getPar(pit).descent();
1488                 }
1489                 y += text->getPar(pit).descent();
1490         }
1491
1492         if (singlepar) {
1493                 // collect cursor paragraph iter bounds
1494                 pit1 = cursor_.bottom().pit();
1495                 pit2 = cursor_.bottom().pit();
1496         }
1497
1498         lyxerr[Debug::DEBUG]
1499                 << BOOST_CURRENT_FUNCTION
1500                 << " y1: " << y1
1501                 << " y2: " << y2
1502                 << " pit1: " << pit1
1503                 << " pit2: " << pit2
1504                 << " npit: " << npit
1505                 << " singlepar: " << singlepar
1506                 << "size: " << size
1507                 << endl;
1508
1509         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2, singlepar, size);
1510 }