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