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/Painter.h"
  68 #include "frontends/WorkArea.h"
  69
  70 #include "graphics/Previews.h"
  71
  72 #include "support/convert.h"
  73 #include "support/filefilterlist.h"
  74 #include "support/filetools.h"
  75 #include "support/forkedcontr.h"
  76 #include "support/package.h"
  77 #include "support/types.h"
  78
  79 #include <boost/bind.hpp>
  80 #include <boost/current_function.hpp>
  81
  82 #include <functional>
  83 #include <vector>
  84
  85 using lyx::frontend::WorkArea;
  86 using lyx::frontend::Clipboard;
  87 using lyx::frontend::Gui;
  88
  89 using lyx::pos_type;
  90
  91 using lyx::support::addPath;
  92 using lyx::support::bformat;
  93 using lyx::support::FileFilterList;
  94 using lyx::support::fileSearch;
  95 using lyx::support::ForkedcallsController;
  96 using lyx::support::isDirWriteable;
  97 using lyx::support::makeDisplayPath;
  98 using lyx::support::makeAbsPath;
  99 using lyx::support::package;
 100
 101 using std::endl;
 102 using std::istringstream;
 103 using std::make_pair;
 104 using std::min;
 105 using std::max;
 106 using std::string;
 107 using std::mem_fun_ref;
 108 using std::vector;
 109
 110 extern BufferList bufferlist;
 111
 112
 113 namespace {
 114
 115 unsigned int const saved_positions_num = 20;
 116
 117 // All the below connection objects are needed because of a bug in some
 118 // versions of GCC (<=2.96 are on the suspects list.) By having and assigning
 119 // to these connections we avoid a segfault upon startup, and also at exit.
 120 // (Lgb)
 121
 122 boost::signals::connection timecon;
 123
 124 /// Return an inset of this class if it exists at the current cursor position
 125 template <class T>
 126 T * getInsetByCode(LCursor & cur, InsetBase::Code code)
 127 {
 128         T * inset = 0;
 129         DocIterator it = cur;
 130         if (it.nextInset() &&
 131             it.nextInset()->lyxCode() == code) {
 132                 inset = static_cast<T*>(it.nextInset());
 133         }
 134         return inset;
 135 }
 136
 137 } // anon namespace
 138
 139
 140 BufferView::Pimpl::Pimpl(BufferView & bv, LyXView * owner)
 141         : bv_(&bv), owner_(owner), buffer_(0), wh_(0), cursor_timeout(400),
 142           using_xterm_cursor(false), cursor_(bv),
 143           multiparsel_cache_(false), anchor_ref_(0), offset_ref_(0)
 144 {
 145         xsel_cache_.set = false;
 146
 147         // Setup the signals
 148         timecon = cursor_timeout.timeout
 149                 .connect(boost::bind(&BufferView::Pimpl::cursorToggle, this));
 150
 151         cursor_timeout.start();
 152
 153         saved_positions.resize(saved_positions_num);
 154         // load saved bookmarks
 155         lyx::Session::BookmarkList & bmList = LyX::ref().session().loadBookmarks();
 156         for (lyx::Session::BookmarkList::iterator bm = bmList.begin();
 157                 bm != bmList.end(); ++bm)
 158                 if (bm->get<0>() < saved_positions_num)
 159                         saved_positions[bm->get<0>()] = Position( bm->get<1>(), bm->get<2>(), bm->get<3>() );
 160         // and then clear them
 161         bmList.clear();
 162 }
 163
 164
 165 void BufferView::Pimpl::addError(ErrorItem const & ei)
 166 {
 167         errorlist_.push_back(ei);
 168 }
 169
 170
 171 void BufferView::Pimpl::showReadonly(bool)
 172 {
 173         owner_->updateWindowTitle();
 174         owner_->getDialogs().updateBufferDependent(false);
 175 }
 176
 177
 178 void BufferView::Pimpl::connectBuffer(Buffer & buf)
 179 {
 180         if (errorConnection_.connected())
 181                 disconnectBuffer();
 182
 183         errorConnection_ =
 184                 buf.error.connect(
 185                         boost::bind(&BufferView::Pimpl::addError, this, _1));
 186
 187         messageConnection_ =
 188                 buf.message.connect(
 189                         boost::bind(&LyXView::message, owner_, _1));
 190
 191         busyConnection_ =
 192                 buf.busy.connect(
 193                         boost::bind(&LyXView::busy, owner_, _1));
 194
 195         titleConnection_ =
 196                 buf.updateTitles.connect(
 197                         boost::bind(&LyXView::updateWindowTitle, owner_));
 198
 199         timerConnection_ =
 200                 buf.resetAutosaveTimers.connect(
 201                         boost::bind(&LyXView::resetAutosaveTimer, owner_));
 202
 203         readonlyConnection_ =
 204                 buf.readonly.connect(
 205                         boost::bind(&BufferView::Pimpl::showReadonly, this, _1));
 206
 207         closingConnection_ =
 208                 buf.closing.connect(
 209                         boost::bind(&BufferView::Pimpl::setBuffer, this, (Buffer *)0));
 210 }
 211
 212
 213 void BufferView::Pimpl::disconnectBuffer()
 214 {
 215         errorConnection_.disconnect();
 216         messageConnection_.disconnect();
 217         busyConnection_.disconnect();
 218         titleConnection_.disconnect();
 219         timerConnection_.disconnect();
 220         readonlyConnection_.disconnect();
 221         closingConnection_.disconnect();
 222 }
 223
 224
 225 void BufferView::Pimpl::newFile(string const & filename, string const & tname,
 226         bool isNamed)
 227 {
 228         setBuffer(::newFile(filename, tname, isNamed));
 229 }
 230
 231
 232 bool BufferView::Pimpl::loadLyXFile(string const & filename, bool tolastfiles)
 233 {
 234         // Get absolute path of file and add ".lyx"
 235         // to the filename if necessary
 236         string s = fileSearch(string(), filename, "lyx");
 237
 238         bool const found = !s.empty();
 239
 240         if (!found)
 241                 s = filename;
 242
 243         // File already open?
 244         if (bufferlist.exists(s)) {
 245                 string const file = makeDisplayPath(s, 20);
 246                 string text = bformat(_("The document %1$s is already "
 247                                         "loaded.\n\nDo you want to revert "
 248                                         "to the saved version?"), file);
 249                 int const ret = Alert::prompt(_("Revert to saved document?"),
 250                         text, 0, 1,  _("&Revert"), _("&Switch to document"));
 251
 252                 if (ret != 0) {
 253                         setBuffer(bufferlist.getBuffer(s));
 254                         return true;
 255                 }
 256                 // FIXME: should be LFUN_REVERT
 257                 if (!bufferlist.close(bufferlist.getBuffer(s), false))
 258                         return false;
 259                 // Fall through to new load. (Asger)
 260         }
 261
 262         Buffer * b = 0;
 263
 264         if (found) {
 265                 b = bufferlist.newBuffer(s);
 266                 connectBuffer(*b);
 267                 if (!::loadLyXFile(b, s)) {
 268                         bufferlist.release(b);
 269                         return false;
 270                 }
 271         } else {
 272                 string text = bformat(_("The document %1$s does not yet "
 273                                         "exist.\n\nDo you want to create "
 274                                         "a new document?"), s);
 275                 int const ret = Alert::prompt(_("Create new document?"),
 276                          text, 0, 1, _("&Create"), _("Cancel"));
 277
 278                 if (ret == 0)
 279                         b = ::newFile(s, string(), true);
 280                 else
 281                         return false;
 282         }
 283
 284         setBuffer(b);
 285         bv_->showErrorList(_("Parse"));
 286
 287         // scroll to the position when the file was last closed
 288         if (lyxrc.use_lastfilepos) {
 289                 lyx::pit_type pit;
 290                 lyx::pos_type pos;
 291                 boost::tie(pit, pos) = LyX::ref().session().loadFilePosition(s);
 292                 // I am not sure how to separate the following part to a function
 293                 // so I will leave this to Lars.
 294                 //
 295                 // check pit since the document may be externally changed.
 296                 if ( static_cast<size_t>(pit) < b->paragraphs().size() ) {
 297                         ParIterator it = b->par_iterator_begin();
 298                         ParIterator const end = b->par_iterator_end();
 299                         for (; it != end; ++it)
 300                                 if (it.pit() == pit) {
 301                                         // restored pos may be bigger than it->size
 302                                         bv_->setCursor(makeDocIterator(it, min(pos, it->size())));
 303                                         bv_->update(Update::FitCursor);
 304                                         break;
 305                                 }
 306                 }
 307         }
 308
 309         if (tolastfiles)
 310                 LyX::ref().session().addLastFile(b->fileName());
 311
 312         return true;
 313 }
 314
 315
 316 lyx::frontend::Gui & BufferView::Pimpl::gui() const
 317 {
 318         return owner_->gui();
 319 }
 320
 321
 322 lyx::frontend::Painter & BufferView::Pimpl::painter() const
 323 {
 324         return owner_->workArea()->getPainter();
 325 }
 326
 327
 328 int BufferView::Pimpl::width() const
 329 {
 330         return width_;
 331 }
 332
 333
 334 int BufferView::Pimpl::height() const
 335 {
 336         return height_;
 337 }
 338
 339
 340 void BufferView::Pimpl::setBuffer(Buffer * b)
 341 {
 342         lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 343                             << "[ b = " << b << "]" << endl;
 344
 345         if (buffer_) {
 346                 disconnectBuffer();
 347                 // Save the actual cursor position and anchor inside the
 348                 // buffer so that it can be restored in case we rechange
 349                 // to this buffer later on.
 350                 buffer_->saveCursor(cursor_.selectionBegin(),
 351                                     cursor_.selectionEnd());
 352                 // current buffer is going to be switched-off, save cursor pos
 353                 LyX::ref().session().saveFilePosition(buffer_->fileName(),
 354                         boost::tie(cursor_.pit(), cursor_.pos()) );
 355         }
 356
 357         // If we are closing current buffer, switch to the first in
 358         // buffer list.
 359         if (!b) {
 360                 lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 361                                     << " No Buffer!" << endl;
 362                 // We are closing the buffer, use the first buffer as current
 363                 buffer_ = bufferlist.first();
 364                 owner_->getDialogs().hideBufferDependent();
 365         } else {
 366                 // Set current buffer
 367                 buffer_ = b;
 368         }
 369
 370         // Reset old cursor
 371         cursor_ = LCursor(*bv_);
 372         anchor_ref_ = 0;
 373         offset_ref_ = 0;
 374
 375
 376         // If we're quitting lyx, don't bother updating stuff
 377         if (quitting)
 378                 return;
 379
 380         if (buffer_) {
 381                 lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
 382                                     << "Buffer addr: " << buffer_ << endl;
 383                 connectBuffer(*buffer_);
 384                 cursor_.push(buffer_->inset());
 385                 cursor_.resetAnchor();
 386                 buffer_->text().init(bv_);
 387                 buffer_->text().setCurrentFont(cursor_);
 388                 if (buffer_->getCursor().size() > 0 &&
 389                     buffer_->getAnchor().size() > 0)
 390                 {
 391                         cursor_.setCursor(buffer_->getAnchor().asDocIterator(&(buffer_->inset())));
 392                         cursor_.resetAnchor();
 393                         cursor_.setCursor(buffer_->getCursor().asDocIterator(&(buffer_->inset())));
 394                         cursor_.setSelection();
 395                 }
 396
 397                 // Buffer-dependent dialogs should be updated or
 398                 // hidden. This should go here because some dialogs (eg ToC)
 399                 // require bv_->text.
 400                 owner_->getDialogs().updateBufferDependent(true);
 401         }
 402
 403         update();
 404         owner_->updateMenubar();
 405         owner_->updateToolbars();
 406         owner_->updateLayoutChoice();
 407         owner_->updateWindowTitle();
 408
 409         // This is done after the layout combox has been populated
 410         if (buffer_) {
 411                 size_t i = cursor_.depth() - 1;
 412                 // we know we'll eventually find a paragraph
 413                 while (true) {
 414                         CursorSlice const & slice = cursor_[i];
 415                         if (!slice.inset().inMathed()) {
 416                                 LyXLayout_ptr const layout = slice.paragraph().layout();
 417                                 owner_->setLayout(layout->name());
 418                                 break;
 419                         }
 420                         BOOST_ASSERT(i>0);
 421                         --i;
 422                 }
 423         }
 424
 425         if (buffer_ && lyx::graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 426                 lyx::graphics::Previews::get().generateBufferPreviews(*buffer_);
 427 }
 428
 429
 430 void BufferView::Pimpl::resizeCurrentBuffer()
 431 {
 432         lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION << endl;
 433         owner_->busy(true);
 434         owner_->message(_("Formatting document..."));
 435
 436         LyXText * text = bv_->text();
 437         if (!text)
 438                 return;
 439
 440         text->init(bv_);
 441         update();
 442
 443         switchKeyMap();
 444         owner_->busy(false);
 445
 446         // Reset the "Formatting..." message
 447         owner_->clearMessage();
 448 }
 449
 450
 451 void BufferView::Pimpl::updateScrollbar()
 452 {
 453         if (!bv_->text()) {
 454                 lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION
 455                                      << " no text in updateScrollbar" << endl;
 456                 scrollbarParameters_.reset();
 457                 return;
 458         }
 459
 460         LyXText & t = *bv_->text();
 461         int const parsize = int(t.paragraphs().size() - 1);
 462         if (anchor_ref_ >  parsize)  {
 463                 anchor_ref_ = parsize;
 464                 offset_ref_ = 0;
 465         }
 466
 467         lyxerr[Debug::GUI]
 468                 << BOOST_CURRENT_FUNCTION
 469                 << " Updating scrollbar: height: " << t.paragraphs().size()
 470                 << " curr par: " << cursor_.bottom().pit()
 471                 << " default height " << defaultRowHeight() << endl;
 472
 473         // It would be better to fix the scrollbar to understand
 474         // values in [0..1] and divide everything by wh
 475
 476         // estimated average paragraph height:
 477         if (wh_ == 0)
 478                 wh_ = height_ / 4;
 479         int h = t.getPar(anchor_ref_).height();
 480
 481         // Normalize anchor/offset (MV):
 482         while (offset_ref_ > h && anchor_ref_ < parsize) {
 483                 anchor_ref_++;
 484                 offset_ref_ -= h;
 485                 h = t.getPar(anchor_ref_).height();
 486         }
 487         // Look at paragraph heights on-screen
 488         int sumh = 0;
 489         int nh = 0;
 490         for (lyx::pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 491                 if (sumh > height_)
 492                         break;
 493                 int const h2 = t.getPar(pit).height();
 494                 sumh += h2;
 495                 nh++;
 496         }
 497         int const hav = sumh / nh;
 498         // More realistic average paragraph height
 499         if (hav > wh_)
 500                 wh_ = hav;
 501
 502         scrollbarParameters_.height = (parsize + 1) * wh_;
 503         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 504         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 505 }
 506
 507
 508 ScrollbarParameters const & BufferView::Pimpl::scrollbarParameters() const
 509 {
 510         return scrollbarParameters_;
 511 }
 512
 513
 514 void BufferView::Pimpl::scrollDocView(int value)
 515 {
 516         lyxerr[Debug::GUI] << BOOST_CURRENT_FUNCTION
 517                            << "[ value = " << value << "]" << endl;
 518
 519         if (!buffer_)
 520                 return;
 521
 522         owner_->gui().guiCursor().hide();
 523
 524         LyXText & t = *bv_->text();
 525
 526         float const bar = value / float(wh_ * t.paragraphs().size());
 527
 528         anchor_ref_ = int(bar * t.paragraphs().size());
 529         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 530                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 531         t.redoParagraph(anchor_ref_);
 532         int const h = t.getPar(anchor_ref_).height();
 533         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 534         update();
 535
 536         if (!lyxrc.cursor_follows_scrollbar)
 537                 return;
 538
 539         int const height = 2 * defaultRowHeight();
 540         int const first = height;
 541         int const last = height_ - height;
 542         LCursor & cur = cursor_;
 543
 544         bv_funcs::CurStatus st = bv_funcs::status(bv_, cur);
 545
 546         switch (st) {
 547         case bv_funcs::CUR_ABOVE:
 548                 t.setCursorFromCoordinates(cur, 0, first);
 549                 cur.clearSelection();
 550                 break;
 551         case bv_funcs::CUR_BELOW:
 552                 t.setCursorFromCoordinates(cur, 0, last);
 553                 cur.clearSelection();
 554                 break;
 555         case bv_funcs::CUR_INSIDE:
 556                 int const y = bv_funcs::getPos(cur, cur.boundary()).y_;
 557                 int const newy = min(last, max(y, first));
 558                 if (y != newy) {
 559                         cur.reset(buffer_->inset());
 560                         t.setCursorFromCoordinates(cur, 0, newy);
 561                 }
 562         }
 563         owner_->updateLayoutChoice();
 564 }
 565
 566
 567 void BufferView::Pimpl::scroll(int /*lines*/)
 568 {
 569 //      if (!buffer_)
 570 //              return;
 571 //
 572 //      LyXText const * t = bv_->text();
 573 //      int const line_height = defaultRowHeight();
 574 //
 575 //      // The new absolute coordinate
 576 //      int new_top_y = top_y() + lines * line_height;
 577 //
 578 //      // Restrict to a valid value
 579 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
 580 //      new_top_y = std::max(0, new_top_y);
 581 //
 582 //      scrollDocView(new_top_y);
 583 //
 584 //      // Update the scrollbar.
 585 //      workArea_->setScrollbarParams(t->height(), top_y(), defaultRowHeight());
 586 }
 587
 588
 589 void BufferView::Pimpl::workAreaKeyPress(LyXKeySymPtr key,
 590                                          key_modifier::state state)
 591 {
 592         owner_->getLyXFunc().processKeySym(key, state);
 593
 594         /* This is perhaps a bit of a hack. When we move
 595          * around, or type, it's nice to be able to see
 596          * the cursor immediately after the keypress. So
 597          * we reset the toggle timeout and force the visibility
 598          * of the cursor. Note we cannot do this inside
 599          * dispatch() itself, because that's called recursively.
 600          */
 601         if (available())
 602                 owner_->gui().guiCursor().show(*bv_);
 603 }
 604
 605
 606 void BufferView::Pimpl::selectionRequested()
 607 {
 608         static string sel;
 609
 610         if (!available())
 611                 return;
 612
 613         LCursor & cur = cursor_;
 614
 615         if (!cur.selection()) {
 616                 xsel_cache_.set = false;
 617                 return;
 618         }
 619
 620         if (!xsel_cache_.set ||
 621             cur.top() != xsel_cache_.cursor ||
 622             cur.anchor_.top() != xsel_cache_.anchor)
 623         {
 624                 xsel_cache_.cursor = cur.top();
 625                 xsel_cache_.anchor = cur.anchor_.top();
 626                 xsel_cache_.set = cur.selection();
 627                 sel = cur.selectionAsString(false);
 628                 if (!sel.empty())
 629                         owner_->gui().clipboard().put(sel);
 630         }
 631 }
 632
 633
 634 void BufferView::Pimpl::selectionLost()
 635 {
 636         if (available()) {
 637                 owner_->gui().guiCursor().hide();
 638                 cursor_.clearSelection();
 639                 xsel_cache_.set = false;
 640         }
 641 }
 642
 643
 644 void BufferView::Pimpl::workAreaResize(int width, int height)
 645 {
 646         bool const widthChange = width != width_;
 647         bool const heightChange = height != height_;
 648
 649         // Update from work area
 650         width_ = width;
 651         height_ = height;
 652
 653         if (buffer_ && widthChange) {
 654                 // The visible LyXView need a resize
 655                 resizeCurrentBuffer();
 656         }
 657
 658         if (widthChange || heightChange)
 659                 update();
 660
 661         owner_->updateLayoutChoice();
 662 }
 663
 664
 665 bool BufferView::Pimpl::fitCursor()
 666 {
 667         if (bv_funcs::status(bv_, cursor_) == bv_funcs::CUR_INSIDE) {
 668                 LyXFont const font = cursor_.getFont();
 669                 int const asc = font_metrics::maxAscent(font);
 670                 int const des = font_metrics::maxDescent(font);
 671                 Point const p = bv_funcs::getPos(cursor_, cursor_.boundary());
 672                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 673                         return false;
 674         }
 675         center();
 676         return true;
 677 }
 678
 679
 680 bool BufferView::Pimpl::multiParSel()
 681 {
 682         if (!cursor_.selection())
 683                 return false;
 684         bool ret = multiparsel_cache_;
 685         multiparsel_cache_ = cursor_.selBegin().pit() != cursor_.selEnd().pit();
 686         // Either this, or previous selection spans paragraphs
 687         return ret || multiparsel_cache_;
 688 }
 689
 690
 691 void BufferView::Pimpl::update(Update::flags flags)
 692 {
 693         lyxerr[Debug::DEBUG]
 694                 << BOOST_CURRENT_FUNCTION
 695                 << "[fitcursor = " << (flags & Update::FitCursor)
 696                 << ", forceupdate = " << (flags & Update::Force)
 697                 << ", singlepar = " << (flags & Update::SinglePar)
 698                 << "]  buffer: " << buffer_ << endl;
 699
 700         // Check needed to survive LyX startup
 701         if (buffer_) {
 702                 // Update macro store
 703                 buffer_->buildMacros();
 704
 705                 CoordCache backup;
 706                 std::swap(theCoords, backup);
 707
 708                 // This, together with doneUpdating(), verifies (using
 709                 // asserts) that screen redraw is not called from
 710                 // within itself.
 711                 theCoords.startUpdating();
 712
 713                 // First drawing step
 714                 ViewMetricsInfo vi = metrics(flags & Update::SinglePar);
 715                 bool forceupdate(flags & (Update::Force | Update::SinglePar));
 716
 717                 if ((flags & Update::FitCursor) && fitCursor()) {
 718                         forceupdate = true;
 719                         vi = metrics();
 720                 }
 721                 if ((flags & Update::MultiParSel) && multiParSel()) {
 722                         forceupdate = true;
 723                         vi = metrics();
 724                 }
 725                 if (forceupdate) {
 726                         // Second drawing step
 727                         owner_->workArea()->redraw(*bv_, vi);
 728                 } else {
 729                         // Abort updating of the coord
 730                         // cache - just restore the old one
 731                         std::swap(theCoords, backup);
 732                 }
 733         } else
 734                 owner_->workArea()->greyOut();
 735
 736         owner_->view_state_changed();
 737 }
 738
 739
 740 // Callback for cursor timer
 741 void BufferView::Pimpl::cursorToggle()
 742 {
 743         if (buffer_) {
 744                 owner_->gui().guiCursor().toggle(*bv_);
 745
 746                 // Use this opportunity to deal with any child processes that
 747                 // have finished but are waiting to communicate this fact
 748                 // to the rest of LyX.
 749                 ForkedcallsController & fcc = ForkedcallsController::get();
 750                 fcc.handleCompletedProcesses();
 751         }
 752
 753         cursor_timeout.restart();
 754 }
 755
 756
 757 bool BufferView::Pimpl::available() const
 758 {
 759         return buffer_ && bv_->text();
 760 }
 761
 762
 763 Change const BufferView::Pimpl::getCurrentChange()
 764 {
 765         if (!buffer_->params().tracking_changes)
 766                 return Change(Change::UNCHANGED);
 767
 768         LyXText * text = bv_->getLyXText();
 769         LCursor & cur = cursor_;
 770
 771         if (!cur.selection())
 772                 return Change(Change::UNCHANGED);
 773
 774         return text->getPar(cur.selBegin().pit()).
 775                         lookupChange(cur.selBegin().pos());
 776 }
 777
 778
 779 void BufferView::Pimpl::savePosition(unsigned int i)
 780 {
 781         if (i >= saved_positions_num)
 782                 return;
 783         BOOST_ASSERT(cursor_.inTexted());
 784         saved_positions[i] = Position(buffer_->fileName(),
 785                                       cursor_.paragraph().id(),
 786                                       cursor_.pos());
 787         if (i > 0)
 788                 owner_->message(bformat(_("Saved bookmark %1$d"), i));
 789 }
 790
 791
 792 void BufferView::Pimpl::restorePosition(unsigned int i)
 793 {
 794         if (i >= saved_positions_num)
 795                 return;
 796
 797         string const fname = saved_positions[i].filename;
 798
 799         cursor_.clearSelection();
 800
 801         if (fname != buffer_->fileName()) {
 802                 Buffer * b = 0;
 803                 if (bufferlist.exists(fname))
 804                         b = bufferlist.getBuffer(fname);
 805                 else {
 806                         b = bufferlist.newBuffer(fname);
 807                         // Don't ask, just load it
 808                         ::loadLyXFile(b, fname);
 809                 }
 810                 if (b)
 811                         setBuffer(b);
 812         }
 813
 814         ParIterator par = buffer_->getParFromID(saved_positions[i].par_id);
 815         if (par == buffer_->par_iterator_end())
 816                 return;
 817
 818         bv_->setCursor(makeDocIterator(par, min(par->size(), saved_positions[i].par_pos)));
 819
 820         if (i > 0)
 821                 owner_->message(bformat(_("Moved to bookmark %1$d"), i));
 822 }
 823
 824
 825 bool BufferView::Pimpl::isSavedPosition(unsigned int i)
 826 {
 827         return i < saved_positions_num && !saved_positions[i].filename.empty();
 828 }
 829
 830
 831 void BufferView::Pimpl::saveSavedPositions()
 832 {
 833         // save bookmarks. It is better to use the pit interface
 834         // but I do not know how to effectively convert between
 835         // par_id and pit.
 836         for (unsigned int i=1; i < saved_positions_num; ++i) {
 837                 if ( isSavedPosition(i) )
 838                         LyX::ref().session().saveBookmark( boost::tie(
 839                                 i,
 840                                 saved_positions[i].filename,
 841                                 saved_positions[i].par_id,
 842                                 saved_positions[i].par_pos) );
 843         }
 844 }
 845
 846
 847 void BufferView::Pimpl::switchKeyMap()
 848 {
 849         if (!lyxrc.rtl_support)
 850                 return;
 851
 852         Intl & intl = owner_->getIntl();
 853         if (bv_->getLyXText()->real_current_font.isRightToLeft()) {
 854                 if (intl.keymap == Intl::PRIMARY)
 855                         intl.keyMapSec();
 856         } else {
 857                 if (intl.keymap == Intl::SECONDARY)
 858                         intl.keyMapPrim();
 859         }
 860 }
 861
 862
 863 void BufferView::Pimpl::center()
 864 {
 865         CursorSlice & bot = cursor_.bottom();
 866         lyx::pit_type const pit = bot.pit();
 867         bot.text()->redoParagraph(pit);
 868         Paragraph const & par = bot.text()->paragraphs()[pit];
 869         anchor_ref_ = pit;
 870         offset_ref_ = bv_funcs::coordOffset(cursor_, cursor_.boundary()).y_
 871                 + par.ascent() - height_ / 2;
 872 }
 873
 874
 875
 876 void BufferView::Pimpl::menuInsertLyXFile(string const & filenm)
 877 {
 878         BOOST_ASSERT(cursor_.inTexted());
 879         string filename = filenm;
 880
 881         if (filename.empty()) {
 882                 // Launch a file browser
 883                 string initpath = lyxrc.document_path;
 884
 885                 if (available()) {
 886                         string const trypath = owner_->buffer()->filePath();
 887                         // If directory is writeable, use this as default.
 888                         if (isDirWriteable(trypath))
 889                                 initpath = trypath;
 890                 }
 891
 892                 FileDialog fileDlg(_("Select LyX document to insert"),
 893                         LFUN_FILE_INSERT,
 894                         make_pair(string(_("Documents|#o#O")),
 895                                   string(lyxrc.document_path)),
 896                         make_pair(string(_("Examples|#E#e")),
 897                                   string(addPath(package().system_support(), "examples"))));
 898
 899                 FileDialog::Result result =
 900                         fileDlg.open(initpath,
 901                                      FileFilterList(_("LyX Documents (*.lyx)")),
 902                                      string());
 903
 904                 if (result.first == FileDialog::Later)
 905                         return;
 906
 907                 filename = result.second;
 908
 909                 // check selected filename
 910                 if (filename.empty()) {
 911                         owner_->message(_("Canceled."));
 912                         return;
 913                 }
 914         }
 915
 916         // Get absolute path of file and add ".lyx"
 917         // to the filename if necessary
 918         filename = fileSearch(string(), filename, "lyx");
 919
 920         string const disp_fn = makeDisplayPath(filename);
 921         owner_->message(bformat(_("Inserting document %1$s..."), disp_fn));
 922
 923         string res;
 924         Buffer buf("", false);
 925         buf.error.connect(boost::bind(&BufferView::Pimpl::addError, this, _1));
 926         if (::loadLyXFile(&buf, makeAbsPath(filename))) {
 927                 lyx::cap::pasteParagraphList(cursor_, buf.paragraphs(),
 928                                              buf.params().textclass);
 929                 res = _("Document %1$s inserted.");
 930         } else
 931                 res = _("Could not insert document %1$s");
 932
 933         owner_->message(bformat(res, disp_fn));
 934         bv_->showErrorList(_("Document insertion"));
 935         resizeCurrentBuffer();
 936 }
 937
 938
 939 void BufferView::Pimpl::trackChanges()
 940 {
 941         bool const tracking = buffer_->params().tracking_changes;
 942
 943         if (!tracking) {
 944                 for_each(buffer_->par_iterator_begin(),
 945                          buffer_->par_iterator_end(),
 946                          bind(&Paragraph::trackChanges, _1, Change::UNCHANGED));
 947                 buffer_->params().tracking_changes = true;
 948
 949                 // We cannot allow undos beyond the freeze point
 950                 buffer_->undostack().clear();
 951         } else {
 952                 cursor_.setCursor(doc_iterator_begin(buffer_->inset()));
 953                 if (lyx::find::findNextChange(bv_)) {
 954                         owner_->getDialogs().show("changes");
 955                         return;
 956                 }
 957
 958                 for_each(buffer_->par_iterator_begin(),
 959                          buffer_->par_iterator_end(),
 960                          mem_fun_ref(&Paragraph::untrackChanges));
 961
 962                 buffer_->params().tracking_changes = false;
 963         }
 964
 965         buffer_->redostack().clear();
 966 }
 967
 968
 969 bool BufferView::Pimpl::workAreaDispatch(FuncRequest const & cmd0)
 970 {
 971         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
 972
 973         // This is only called for mouse related events including
 974         // LFUN_FILE_OPEN generated by drag-and-drop.
 975         FuncRequest cmd = cmd0;
 976
 977         // Handle drag&drop
 978         if (cmd.action == LFUN_FILE_OPEN) {
 979                 owner_->dispatch(cmd);
 980                 return true;
 981         }
 982
 983         if (!buffer_)
 984                 return false;
 985
 986         LCursor cur(*bv_);
 987         cur.push(buffer_->inset());
 988         cur.selection() = cursor_.selection();
 989
 990         // Doesn't go through lyxfunc, so we need to update
 991         // the layout choice etc. ourselves
 992
 993         // E.g. Qt mouse press when no buffer
 994         if (!available())
 995                 return false;
 996
 997         owner_->gui().guiCursor().hide();
 998
 999         // Either the inset under the cursor or the
1000         // surrounding LyXText will handle this event.
1001
1002         // Build temporary cursor.
1003         cmd.y = min(max(cmd.y, -1), height_);
1004         InsetBase * inset = bv_->text()->editXY(cur, cmd.x, cmd.y);
1005         //lyxerr << BOOST_CURRENT_FUNCTION
1006         //       << " * hit inset at tip: " << inset << endl;
1007         //lyxerr << BOOST_CURRENT_FUNCTION
1008         //       << " * created temp cursor:" << cur << endl;
1009
1010         // Put anchor at the same position.
1011         cur.resetAnchor();
1012
1013         // Try to dispatch to an non-editable inset near this position
1014         // via the temp cursor. If the inset wishes to change the real
1015         // cursor it has to do so explicitly by using
1016         //  cur.bv().cursor() = cur;  (or similar)
1017         if (inset)
1018                 inset->dispatch(cur, cmd);
1019
1020         // Now dispatch to the temporary cursor. If the real cursor should
1021         // be modified, the inset's dispatch has to do so explicitly.
1022         if (!cur.result().dispatched())
1023                 cur.dispatch(cmd);
1024
1025         if (cur.result().dispatched()) {
1026                 // Redraw if requested or necessary.
1027                 if (cur.result().update())
1028                         update(Update::FitCursor | Update::Force);
1029                 else
1030                         update(Update::FitCursor | Update::MultiParSel);
1031         }
1032
1033         // See workAreaKeyPress
1034         cursor_timeout.restart();
1035         owner_->gui().guiCursor().show(*bv_);
1036
1037         // Skip these when selecting
1038         if (cmd.action != LFUN_MOUSE_MOTION) {
1039                 owner_->updateLayoutChoice();
1040                 owner_->updateToolbars();
1041         }
1042
1043         // Slight hack: this is only called currently when we
1044         // clicked somewhere, so we force through the display
1045         // of the new status here.
1046         owner_->clearMessage();
1047         return true;
1048 }
1049
1050
1051 FuncStatus BufferView::Pimpl::getStatus(FuncRequest const & cmd)
1052 {
1053         FuncStatus flag;
1054
1055         switch (cmd.action) {
1056
1057         case LFUN_UNDO:
1058                 flag.enabled(!buffer_->undostack().empty());
1059                 break;
1060         case LFUN_REDO:
1061                 flag.enabled(!buffer_->redostack().empty());
1062                 break;
1063         case LFUN_FILE_INSERT:
1064         case LFUN_FILE_INSERT_ASCII_PARA:
1065         case LFUN_FILE_INSERT_ASCII:
1066         case LFUN_BOOKMARK_SAVE:
1067                 // FIXME: Actually, these LFUNS should be moved to LyXText
1068                 flag.enabled(cursor_.inTexted());
1069                 break;
1070         case LFUN_FONT_STATE:
1071         case LFUN_LABEL_INSERT:
1072         case LFUN_PARAGRAPH_GOTO:
1073         // FIXME handle non-trivially
1074         case LFUN_OUTLINE_UP:
1075         case LFUN_OUTLINE_DOWN:
1076         case LFUN_OUTLINE_IN:
1077         case LFUN_OUTLINE_OUT:
1078         case LFUN_ERROR_NEXT:
1079         case LFUN_NOTE_NEXT:
1080         case LFUN_REFERENCE_NEXT:
1081         case LFUN_WORD_FIND:
1082         case LFUN_WORD_REPLACE:
1083         case LFUN_MARK_OFF:
1084         case LFUN_MARK_ON:
1085         case LFUN_MARK_TOGGLE:
1086         case LFUN_SCREEN_RECENTER:
1087         case LFUN_BIBTEX_DATABASE_ADD:
1088         case LFUN_BIBTEX_DATABASE_DEL:
1089         case LFUN_WORDS_COUNT:
1090                 flag.enabled(true);
1091                 break;
1092
1093         case LFUN_LABEL_GOTO: {
1094                 flag.enabled(!cmd.argument.empty()
1095                     || getInsetByCode<InsetRef>(cursor_, InsetBase::REF_CODE));
1096                 break;
1097         }
1098
1099         case LFUN_BOOKMARK_GOTO:
1100                 flag.enabled(isSavedPosition(convert<unsigned int>(cmd.argument)));
1101                 break;
1102         case LFUN_CHANGES_TRACK:
1103                 flag.enabled(true);
1104                 flag.setOnOff(buffer_->params().tracking_changes);
1105                 break;
1106
1107         case LFUN_CHANGES_OUTPUT: {
1108                 OutputParams runparams;
1109                 LaTeXFeatures features(*buffer_, buffer_->params(), runparams);
1110                 flag.enabled(buffer_ && buffer_->params().tracking_changes
1111                         && features.isAvailable("dvipost"));
1112                 flag.setOnOff(buffer_->params().output_changes);
1113                 break;
1114         }
1115
1116         case LFUN_CHANGES_MERGE:
1117         case LFUN_CHANGE_ACCEPT: // what about these two
1118         case LFUN_CHANGE_REJECT: // what about these two
1119         case LFUN_ALL_CHANGES_ACCEPT:
1120         case LFUN_ALL_CHANGES_REJECT:
1121                 flag.enabled(buffer_ && buffer_->params().tracking_changes);
1122                 break;
1123
1124         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
1125                 flag.setOnOff(buffer_->params().compressed);
1126                 break;
1127         }
1128
1129         default:
1130                 flag.enabled(false);
1131         }
1132
1133         return flag;
1134 }
1135
1136
1137
1138 bool BufferView::Pimpl::dispatch(FuncRequest const & cmd)
1139 {
1140         //lyxerr << BOOST_CURRENT_FUNCTION
1141         //       << [ cmd = " << cmd << "]" << endl;
1142
1143         // Make sure that the cached BufferView is correct.
1144         lyxerr[Debug::ACTION] << BOOST_CURRENT_FUNCTION
1145                 << " action[" << cmd.action << ']'
1146                 << " arg[" << cmd.argument << ']'
1147                 << " x[" << cmd.x << ']'
1148                 << " y[" << cmd.y << ']'
1149                 << " button[" << cmd.button() << ']'
1150                 << endl;
1151
1152         LCursor & cur = cursor_;
1153
1154         switch (cmd.action) {
1155
1156         case LFUN_UNDO:
1157                 if (available()) {
1158                         cur.message(_("Undo"));
1159                         cur.clearSelection();
1160                         if (!textUndo(*bv_))
1161                                 cur.message(_("No further undo information"));
1162                         update();
1163                         switchKeyMap();
1164                 }
1165                 break;
1166
1167         case LFUN_REDO:
1168                 if (available()) {
1169                         cur.message(_("Redo"));
1170                         cur.clearSelection();
1171                         if (!textRedo(*bv_))
1172                                 cur.message(_("No further redo information"));
1173                         update();
1174                         switchKeyMap();
1175                 }
1176                 break;
1177
1178         case LFUN_FILE_INSERT:
1179                 menuInsertLyXFile(cmd.argument);
1180                 break;
1181
1182         case LFUN_FILE_INSERT_ASCII_PARA:
1183                 insertAsciiFile(bv_, cmd.argument, true);
1184                 break;
1185
1186         case LFUN_FILE_INSERT_ASCII:
1187                 insertAsciiFile(bv_, cmd.argument, false);
1188                 break;
1189
1190         case LFUN_FONT_STATE:
1191                 cur.message(cur.currentState());
1192                 break;
1193
1194         case LFUN_BOOKMARK_SAVE:
1195                 savePosition(convert<unsigned int>(cmd.argument));
1196                 break;
1197
1198         case LFUN_BOOKMARK_GOTO:
1199                 restorePosition(convert<unsigned int>(cmd.argument));
1200                 break;
1201
1202         case LFUN_LABEL_GOTO: {
1203                 string label = cmd.argument;
1204                 if (label.empty()) {
1205                         InsetRef * inset =
1206                                 getInsetByCode<InsetRef>(cursor_,
1207                                                          InsetBase::REF_CODE);
1208                         if (inset) {
1209                                 label = inset->getContents();
1210                                 savePosition(0);
1211                         }
1212                 }
1213
1214                 if (!label.empty())
1215                         bv_->gotoLabel(label);
1216                 break;
1217         }
1218
1219         case LFUN_PARAGRAPH_GOTO: {
1220                 int const id = convert<int>(cmd.argument);
1221                 ParIterator par = buffer_->getParFromID(id);
1222                 if (par == buffer_->par_iterator_end()) {
1223                         lyxerr[Debug::INFO] << "No matching paragraph found! ["
1224                                             << id << ']' << endl;
1225                         break;
1226                 } else {
1227                         lyxerr[Debug::INFO] << "Paragraph " << par->id()
1228                                             << " found." << endl;
1229                 }
1230
1231                 // Set the cursor
1232                 bv_->setCursor(makeDocIterator(par, 0));
1233
1234                 update();
1235                 switchKeyMap();
1236                 break;
1237         }
1238
1239         case LFUN_OUTLINE_UP:
1240                 lyx::toc::outline(lyx::toc::Up, cursor_);
1241                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
1242                 updateLabels(*buffer_);
1243                 break;
1244         case LFUN_OUTLINE_DOWN:
1245                 lyx::toc::outline(lyx::toc::Down, cursor_);
1246                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
1247                 updateLabels(*buffer_);
1248                 break;
1249         case LFUN_OUTLINE_IN:
1250                 lyx::toc::outline(lyx::toc::In, cursor_);
1251                 updateLabels(*buffer_);
1252                 break;
1253         case LFUN_OUTLINE_OUT:
1254                 lyx::toc::outline(lyx::toc::Out, cursor_);
1255                 updateLabels(*buffer_);
1256                 break;
1257
1258         case LFUN_ERROR_NEXT:
1259                 bv_funcs::gotoInset(bv_, InsetBase::ERROR_CODE, false);
1260                 break;
1261
1262         case LFUN_NOTE_NEXT:
1263                 bv_funcs::gotoInset(bv_, InsetBase::NOTE_CODE, false);
1264                 break;
1265
1266         case LFUN_REFERENCE_NEXT: {
1267                 vector<InsetBase_code> tmp;
1268                 tmp.push_back(InsetBase::LABEL_CODE);
1269                 tmp.push_back(InsetBase::REF_CODE);
1270                 bv_funcs::gotoInset(bv_, tmp, true);
1271                 break;
1272         }
1273
1274         case LFUN_CHANGES_TRACK:
1275                 trackChanges();
1276                 break;
1277
1278         case LFUN_CHANGES_OUTPUT: {
1279                 bool const state = buffer_->params().output_changes;
1280                 buffer_->params().output_changes = !state;
1281                 break;
1282         }
1283
1284         case LFUN_CHANGES_MERGE:
1285                 if (lyx::find::findNextChange(bv_))
1286                         owner_->getDialogs().show("changes");
1287                 break;
1288
1289         case LFUN_ALL_CHANGES_ACCEPT: {
1290                 cursor_.reset(buffer_->inset());
1291 #ifdef WITH_WARNINGS
1292 #warning FIXME changes
1293 #endif
1294                 while (lyx::find::findNextChange(bv_))
1295                         bv_->getLyXText()->acceptChange(cursor_);
1296                 update();
1297                 break;
1298         }
1299
1300         case LFUN_ALL_CHANGES_REJECT: {
1301                 cursor_.reset(buffer_->inset());
1302 #ifdef WITH_WARNINGS
1303 #warning FIXME changes
1304 #endif
1305                 while (lyx::find::findNextChange(bv_))
1306                         bv_->getLyXText()->rejectChange(cursor_);
1307                 break;
1308         }
1309
1310         case LFUN_WORD_FIND:
1311                 lyx::find::find(bv_, cmd);
1312                 break;
1313
1314         case LFUN_WORD_REPLACE:
1315                 lyx::find::replace(bv_, cmd);
1316                 break;
1317
1318         case LFUN_MARK_OFF:
1319                 cur.clearSelection();
1320                 cur.resetAnchor();
1321                 cur.message(N_("Mark off"));
1322                 break;
1323
1324         case LFUN_MARK_ON:
1325                 cur.clearSelection();
1326                 cur.mark() = true;
1327                 cur.resetAnchor();
1328                 cur.message(N_("Mark on"));
1329                 break;
1330
1331         case LFUN_MARK_TOGGLE:
1332                 cur.clearSelection();
1333                 if (cur.mark()) {
1334                         cur.mark() = false;
1335                         cur.message(N_("Mark removed"));
1336                 } else {
1337                         cur.mark() = true;
1338                         cur.message(N_("Mark set"));
1339                 }
1340                 cur.resetAnchor();
1341                 break;
1342
1343         case LFUN_SCREEN_RECENTER:
1344                 center();
1345                 break;
1346
1347         case LFUN_BIBTEX_DATABASE_ADD: {
1348                 LCursor tmpcur = cursor_;
1349                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
1350                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1351                                                 InsetBase::BIBTEX_CODE);
1352                 if (inset) {
1353                         if (inset->addDatabase(cmd.argument))
1354                                 buffer_->updateBibfilesCache();
1355                 }
1356                 break;
1357         }
1358
1359         case LFUN_BIBTEX_DATABASE_DEL: {
1360                 LCursor tmpcur = cursor_;
1361                 bv_funcs::findInset(tmpcur, InsetBase::BIBTEX_CODE, false);
1362                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1363                                                 InsetBase::BIBTEX_CODE);
1364                 if (inset) {
1365                         if (inset->delDatabase(cmd.argument))
1366                                 buffer_->updateBibfilesCache();
1367                 }
1368                 break;
1369         }
1370
1371         case LFUN_WORDS_COUNT: {
1372                 DocIterator from, to;
1373                 if (cur.selection()) {
1374                         from = cur.selectionBegin();
1375                         to = cur.selectionEnd();
1376                 } else {
1377                         from = doc_iterator_begin(buffer_->inset());
1378                         to = doc_iterator_end(buffer_->inset());
1379                 }
1380                 int const count = countWords(from, to);
1381                 string message;
1382                 if (count != 1) {
1383                         if (cur.selection())
1384                                 message = bformat(_("%1$d words in selection."),
1385                                           count);
1386                                 else
1387                                         message = bformat(_("%1$d words in document."),
1388                                                           count);
1389                 }
1390                 else {
1391                         if (cur.selection())
1392                                 message = _("One word in selection.");
1393                         else
1394                                 message = _("One word in document.");
1395                 }
1396
1397                 Alert::information(_("Count words"), message);
1398         }
1399                 break;
1400
1401         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1402                 // turn compression on/off
1403                 buffer_->params().compressed = !buffer_->params().compressed;
1404                 break;
1405
1406         default:
1407                 return false;
1408         }
1409
1410         return true;
1411 }
1412
1413
1414 ViewMetricsInfo BufferView::Pimpl::metrics(bool singlepar)
1415 {
1416         // Remove old position cache
1417         theCoords.clear();
1418         BufferView & bv = *bv_;
1419         LyXText * const text = bv.text();
1420         lyx::pit_type size = int(text->paragraphs().size());
1421
1422         if (anchor_ref_ > int(text->paragraphs().size() - 1)) {
1423                 anchor_ref_ = int(text->paragraphs().size() - 1);
1424                 offset_ref_ = 0;
1425         }
1426
1427         lyx::pit_type const pit = anchor_ref_;
1428         int pit1 = pit;
1429         int pit2 = pit;
1430         size_t const npit = text->paragraphs().size();
1431
1432         // Rebreak anchor paragraph. In Single Paragraph mode, rebreak only
1433         // the (main text, not inset!) paragraph containing the cursor.
1434         // (if this paragraph contains insets etc., rebreaking will
1435         // recursively descend)
1436         if (!singlepar || pit == cursor_.bottom().pit())
1437                 text->redoParagraph(pit);
1438         int y0 = text->getPar(pit).ascent() - offset_ref_;
1439
1440         // Redo paragraphs above anchor if necessary; again, in Single Par
1441         // mode, only if we encounter the (main text) one having the cursor.
1442         int y1 = y0;
1443         while (y1 > 0 && pit1 > 0) {
1444                 y1 -= text->getPar(pit1).ascent();
1445                 --pit1;
1446                 if (!singlepar || pit1 == cursor_.bottom().pit())
1447                         text->redoParagraph(pit1);
1448                 y1 -= text->getPar(pit1).descent();
1449         }
1450
1451
1452         // Take care of ascent of first line
1453         y1 -= text->getPar(pit1).ascent();
1454
1455         // Normalize anchor for next time
1456         anchor_ref_ = pit1;
1457         offset_ref_ = -y1;
1458
1459         // Grey at the beginning is ugly
1460         if (pit1 == 0 && y1 > 0) {
1461                 y0 -= y1;
1462                 y1 = 0;
1463                 anchor_ref_ = 0;
1464         }
1465
1466         // Redo paragraphs below the anchor if necessary. Single par mode:
1467         // only the one containing the cursor if encountered.
1468         int y2 = y0;
1469         while (y2 < bv.workHeight() && pit2 < int(npit) - 1) {
1470                 y2 += text->getPar(pit2).descent();
1471                 ++pit2;
1472                 if (!singlepar || pit2 == cursor_.bottom().pit())
1473                         text->redoParagraph(pit2);
1474                 y2 += text->getPar(pit2).ascent();
1475         }
1476
1477         // Take care of descent of last line
1478         y2 += text->getPar(pit2).descent();
1479
1480         // The coordinates of all these paragraphs are correct, cache them
1481         int y = y1;
1482         for (lyx::pit_type pit = pit1; pit <= pit2; ++pit) {
1483                 y += text->getPar(pit).ascent();
1484                 theCoords.parPos()[text][pit] = Point(0, y);
1485                 if (singlepar && pit == cursor_.bottom().pit()) {
1486                         // In Single Paragraph mode, collect here the
1487                         // y1 and y2 of the (one) paragraph the cursor is in
1488                         y1 = y - text->getPar(pit).ascent();
1489                         y2 = y + text->getPar(pit).descent();
1490                 }
1491                 y += text->getPar(pit).descent();
1492         }
1493
1494         if (singlepar) {
1495                 // collect cursor paragraph iter bounds
1496                 pit1 = cursor_.bottom().pit();
1497                 pit2 = cursor_.bottom().pit();
1498         }
1499
1500         lyxerr[Debug::DEBUG]
1501                 << BOOST_CURRENT_FUNCTION
1502                 << " y1: " << y1
1503                 << " y2: " << y2
1504                 << " pit1: " << pit1
1505                 << " pit2: " << pit2
1506                 << " npit: " << npit
1507                 << " singlepar: " << singlepar
1508                 << "size: " << size
1509                 << endl;
1510
1511         return ViewMetricsInfo(pit1, pit2, y1, y2, singlepar, size);
1512 }