src/BufferView_pimpl.C

   1 /**
   2  * \file BufferView_pimpl.C
   3  * Copyright 2002 the LyX Team
   4  * Read the file COPYING
   5  *
   6  * \author Lars Gullik Bjønnes
   7  * \author various
   8  */
   9
  10 #include <config.h>
  11
  12 #include "BufferView_pimpl.h"
  13 #include "bufferlist.h"
  14 #include "buffer.h"
  15 #include "buffer_funcs.h"
  16 #include "bufferview_funcs.h"
  17 #include "lfuns.h"
  18 #include "debug.h"
  19 #include "factory.h"
  20 #include "FloatList.h"
  21 #include "funcrequest.h"
  22 #include "gettext.h"
  23 #include "intl.h"
  24 #include "iterators.h"
  25 #include "Lsstream.h"
  26 #include "lyx_cb.h" // added for Dispatch functions
  27 #include "lyx_main.h"
  28 #include "lyxfind.h"
  29 #include "lyxfunc.h"
  30 #include "lyxtext.h"
  31 #include "lyxrc.h"
  32 #include "lyxrow.h"
  33 #include "lastfiles.h"
  34 #include "paragraph.h"
  35 #include "ParagraphParameters.h"
  36 #include "TextCache.h"
  37 #include "undo_funcs.h"
  38
  39 #include "insets/insetfloatlist.h"
  40 #include "insets/insetgraphics.h"
  41 #include "insets/insetinclude.h"
  42 #include "insets/insetref.h"
  43 #include "insets/insettext.h"
  44
  45 #include "frontends/Alert.h"
  46 #include "frontends/Dialogs.h"
  47 #include "frontends/FileDialog.h"
  48 #include "frontends/LyXView.h"
  49 #include "frontends/LyXScreenFactory.h"
  50 #include "frontends/mouse_state.h"
  51 #include "frontends/screen.h"
  52 #include "frontends/WorkArea.h"
  53 #include "frontends/WorkAreaFactory.h"
  54
  55 #include "mathed/formulabase.h"
  56
  57 #include "graphics/Previews.h"
  58
  59 #include "support/LAssert.h"
  60 #include "support/tostr.h"
  61 #include "support/filetools.h"
  62
  63 #include <boost/bind.hpp>
  64 #include <boost/signals/connection.hpp>
  65
  66 #include <unistd.h>
  67 #include <sys/wait.h>
  68
  69
  70 using std::vector;
  71 using std::find_if;
  72 using std::find;
  73 using std::pair;
  74 using std::endl;
  75 using std::make_pair;
  76 using std::min;
  77
  78 using lyx::pos_type;
  79 using namespace lyx::support;
  80 using namespace bv_funcs;
  81
  82 extern BufferList bufferlist;
  83
  84
  85 namespace {
  86
  87 unsigned int const saved_positions_num = 20;
  88
  89 // All the below connection objects are needed because of a bug in some
  90 // versions of GCC (<=2.96 are on the suspects list.) By having and assigning
  91 // to these connections we avoid a segfault upon startup, and also at exit.
  92 // (Lgb)
  93
  94 boost::signals::connection dispatchcon;
  95 boost::signals::connection timecon;
  96 boost::signals::connection doccon;
  97 boost::signals::connection resizecon;
  98 boost::signals::connection kpresscon;
  99 boost::signals::connection selectioncon;
 100 boost::signals::connection lostcon;
 101
 102
 103 } // anon namespace
 104
 105
 106 BufferView::Pimpl::Pimpl(BufferView * bv, LyXView * owner,
 107              int xpos, int ypos, int width, int height)
 108         : bv_(bv), owner_(owner), buffer_(0), cursor_timeout(400),
 109           using_xterm_cursor(false)
 110 {
 111         workarea_.reset(WorkAreaFactory::create(xpos, ypos, width, height));
 112         screen_.reset(LyXScreenFactory::create(workarea()));
 113
 114         // Setup the signals
 115         doccon = workarea().scrollDocView
 116                 .connect(boost::bind(&BufferView::Pimpl::scrollDocView, this, _1));
 117         resizecon = workarea().workAreaResize
 118                 .connect(boost::bind(&BufferView::Pimpl::workAreaResize, this));
 119         dispatchcon = workarea().dispatch
 120                 .connect(boost::bind(&BufferView::Pimpl::workAreaDispatch, this, _1));
 121         kpresscon = workarea().workAreaKeyPress
 122                 .connect(boost::bind(&BufferView::Pimpl::workAreaKeyPress, this, _1, _2));
 123         selectioncon = workarea().selectionRequested
 124                 .connect(boost::bind(&BufferView::Pimpl::selectionRequested, this));
 125         lostcon = workarea().selectionLost
 126                 .connect(boost::bind(&BufferView::Pimpl::selectionLost, this));
 127
 128         timecon = cursor_timeout.timeout
 129                 .connect(boost::bind(&BufferView::Pimpl::cursorToggle, this));
 130         cursor_timeout.start();
 131         saved_positions.resize(saved_positions_num);
 132 }
 133
 134
 135 void BufferView::Pimpl::addError(ErrorItem const & ei)
 136 {
 137         errorlist_.push_back(ei);
 138 }
 139
 140
 141 void BufferView::Pimpl::showReadonly(bool)
 142 {
 143         owner_->updateWindowTitle();
 144         owner_->getDialogs().updateBufferDependent(false);
 145 }
 146
 147
 148 void BufferView::Pimpl::connectBuffer(Buffer & buf)
 149 {
 150         if (errorConnection_.connected())
 151                 disconnectBuffer();
 152
 153         errorConnection_ = buf.error.connect(boost::bind(&BufferView::Pimpl::addError, this, _1));
 154         messageConnection_ = buf.message.connect(boost::bind(&LyXView::message, owner_, _1));
 155         busyConnection_ = buf.busy.connect(boost::bind(&LyXView::busy, owner_, _1));
 156         titleConnection_ = buf.updateTitles.connect(boost::bind(&LyXView::updateWindowTitle, owner_));
 157         timerConnection_ = buf.resetAutosaveTimers.connect(boost::bind(&LyXView::resetAutosaveTimer, owner_));
 158         readonlyConnection_ = buf.readonly.connect(boost::bind(&BufferView::Pimpl::showReadonly, this, _1));
 159         closingConnection_ = buf.closing.connect(boost::bind(&BufferView::Pimpl::buffer, this, (Buffer *)0));
 160 }
 161
 162
 163 void BufferView::Pimpl::disconnectBuffer()
 164 {
 165         errorConnection_.disconnect();
 166         messageConnection_.disconnect();
 167         busyConnection_.disconnect();
 168         titleConnection_.disconnect();
 169         timerConnection_.disconnect();
 170         readonlyConnection_.disconnect();
 171         closingConnection_.disconnect();
 172 }
 173
 174
 175 bool BufferView::Pimpl::newFile(string const & filename,
 176                                 string const & tname,
 177                                 bool isNamed)
 178 {
 179         Buffer * b = ::newFile(filename, tname, isNamed);
 180         buffer(b);
 181         return true;
 182 }
 183
 184
 185 bool BufferView::Pimpl::loadLyXFile(string const & filename, bool tolastfiles)
 186 {
 187         // get absolute path of file and add ".lyx" to the filename if
 188         // necessary
 189         string s = FileSearch(string(), filename, "lyx");
 190         if (s.empty()) {
 191                 s = filename;
 192         }
 193
 194         // file already open?
 195         if (bufferlist.exists(s)) {
 196                 string const file = MakeDisplayPath(s, 20);
 197                 string text = bformat(_("The document %1$s is already "
 198                                         "loaded.\n\nDo you want to revert "
 199                                         "to the saved version?"), file);
 200                 int const ret = Alert::prompt(_("Revert to saved document?"),
 201                         text, 0, 1,  _("&Revert"), _("&Switch to document"));
 202
 203                 if (ret != 0) {
 204                         buffer(bufferlist.getBuffer(s));
 205                         return true;
 206                 } else {
 207                         // FIXME: should be LFUN_REVERT
 208                         if (!bufferlist.close(bufferlist.getBuffer(s), false))
 209                                 return false;
 210                         // Fall through to new load. (Asger)
 211                 }
 212         }
 213         Buffer * b = bufferlist.newBuffer(s);
 214
 215         connectBuffer(*b);
 216
 217         if (! ::loadLyXFile(b, s)) {
 218                 bufferlist.release(b);
 219                 string text = bformat(_("The document %1$s does not yet "
 220                                         "exist.\n\nDo you want to create "
 221                                         "a new document?"), s);
 222                 int const ret = Alert::prompt(_("Create new document?"),
 223                          text, 0, 1, _("&Create"), _("Cancel"));
 224
 225                 if (ret != 0)
 226                         return false;
 227         }
 228
 229         buffer(b);
 230
 231         if (tolastfiles)
 232                 lastfiles->newFile(b->fileName());
 233
 234         bv_->showErrorList(_("Parse"));
 235
 236         return true;
 237 }
 238
 239
 240 WorkArea & BufferView::Pimpl::workarea() const
 241 {
 242         return *workarea_.get();
 243 }
 244
 245
 246 LyXScreen & BufferView::Pimpl::screen() const
 247 {
 248         return *screen_.get();
 249 }
 250
 251
 252 Painter & BufferView::Pimpl::painter() const
 253 {
 254         return workarea().getPainter();
 255 }
 256
 257
 258 void BufferView::Pimpl::buffer(Buffer * b)
 259 {
 260         lyxerr[Debug::INFO] << "Setting buffer in BufferView ("
 261                             << b << ')' << endl;
 262         if (buffer_) {
 263                 disconnectBuffer();
 264                 // Put the old text into the TextCache, but
 265                 // only if the buffer is still loaded.
 266                 // Also set the owner of the test to 0
 267                 //              bv_->text->owner(0);
 268                 textcache.add(buffer_, workarea().workWidth(), bv_->text);
 269                 if (lyxerr.debugging())
 270                         textcache.show(lyxerr, "BufferView::buffer");
 271
 272                 bv_->text = 0;
 273         }
 274
 275         // set current buffer
 276         buffer_ = b;
 277
 278         // if we're quitting lyx, don't bother updating stuff
 279         if (quitting)
 280                 return;
 281
 282         // if we are closing the buffer, use the first buffer as current
 283         if (!buffer_) {
 284                 buffer_ = bufferlist.first();
 285         }
 286
 287         if (buffer_) {
 288                 lyxerr[Debug::INFO] << "Buffer addr: " << buffer_ << endl;
 289                 connectBuffer(*buffer_);
 290
 291                 // If we don't have a text object for this, we make one
 292                 if (bv_->text == 0) {
 293                         resizeCurrentBuffer();
 294                 }
 295
 296                 // FIXME: needed when ?
 297                 bv_->text->top_y(screen().topCursorVisible(bv_->text));
 298
 299                 // Buffer-dependent dialogs should be updated or
 300                 // hidden. This should go here because some dialogs (eg ToC)
 301                 // require bv_->text.
 302                 owner_->getDialogs().updateBufferDependent(true);
 303         } else {
 304                 lyxerr[Debug::INFO] << "  No Buffer!" << endl;
 305                 owner_->getDialogs().hideBufferDependent();
 306
 307                 // Also remove all remaining text's from the testcache.
 308                 // (there should not be any!) (if there is any it is a
 309                 // bug!)
 310                 if (lyxerr.debugging())
 311                         textcache.show(lyxerr, "buffer delete all");
 312                 textcache.clear();
 313         }
 314
 315         repaint();
 316         updateScrollbar();
 317         owner_->updateMenubar();
 318         owner_->updateToolbar();
 319         owner_->updateLayoutChoice();
 320         owner_->updateWindowTitle();
 321
 322         if (buffer_) {
 323                 // Don't forget to update the Layout
 324                 string const layoutname =
 325                         bv_->text->cursor.par()->layout()->name();
 326                 owner_->setLayout(layoutname);
 327         }
 328
 329         if (grfx::Previews::activated() && buffer_)
 330                 grfx::Previews::get().generateBufferPreviews(*buffer_);
 331 }
 332
 333
 334 bool BufferView::Pimpl::fitCursor()
 335 {
 336         bool ret;
 337
 338         if (bv_->theLockingInset()) {
 339                 bv_->theLockingInset()->fitInsetCursor(bv_);
 340                 ret = true;
 341         } else {
 342                 ret = screen().fitCursor(bv_->text, bv_);
 343         }
 344
 345         dispatch(FuncRequest(LFUN_PARAGRAPH_UPDATE));
 346
 347         // We need to always update, in case we did a
 348         // paste and we stayed anchored to a row, but
 349         // the actual height of the doc changed ...
 350         updateScrollbar();
 351         return ret;
 352 }
 353
 354
 355 void BufferView::Pimpl::redoCurrentBuffer()
 356 {
 357         lyxerr[Debug::INFO] << "BufferView::redoCurrentBuffer" << endl;
 358         if (buffer_ && bv_->text) {
 359                 resizeCurrentBuffer();
 360                 updateScrollbar();
 361                 owner_->updateLayoutChoice();
 362                 repaint();
 363         }
 364 }
 365
 366
 367 int BufferView::Pimpl::resizeCurrentBuffer()
 368 {
 369         lyxerr[Debug::INFO] << "resizeCurrentBuffer" << endl;
 370
 371         ParagraphList::iterator par;
 372         ParagraphList::iterator selstartpar;
 373         ParagraphList::iterator selendpar;
 374         UpdatableInset * the_locking_inset = 0;
 375
 376         pos_type pos = 0;
 377         pos_type selstartpos = 0;
 378         pos_type selendpos = 0;
 379         bool selection = false;
 380         bool mark_set  = false;
 381
 382         owner_->busy(true);
 383
 384         owner_->message(_("Formatting document..."));
 385
 386         if (bv_->text) {
 387                 par = bv_->text->cursor.par();
 388                 pos = bv_->text->cursor.pos();
 389                 selstartpar = bv_->text->selection.start.par();
 390                 selstartpos = bv_->text->selection.start.pos();
 391                 selendpar = bv_->text->selection.end.par();
 392                 selendpos = bv_->text->selection.end.pos();
 393                 selection = bv_->text->selection.set();
 394                 mark_set = bv_->text->selection.mark();
 395                 the_locking_inset = bv_->theLockingInset();
 396                 resizeInsets(bv_);
 397                 bv_->text->fullRebreak();
 398                 update();
 399         } else {
 400                 lyxerr << "text not available!\n";
 401                 // See if we have a text in TextCache that fits
 402                 // the new buffer_ with the correct width.
 403                 bv_->text = textcache.findFit(buffer_, workarea().workWidth());
 404                 if (bv_->text) {
 405                         lyxerr << "text in cache!\n";
 406                         if (lyxerr.debugging()) {
 407                                 lyxerr << "Found a LyXText that fits:\n";
 408                                 textcache.show(lyxerr, make_pair(buffer_, make_pair(workarea().workWidth(), bv_->text)));
 409                         }
 410                         // Set the owner of the newly found text
 411                         //      bv_->text->owner(bv_);
 412                         if (lyxerr.debugging())
 413                                 textcache.show(lyxerr, "resizeCurrentBuffer");
 414
 415                         resizeInsets(bv_);
 416                 } else {
 417                         lyxerr << "no text in cache!\n";
 418                         bv_->text = new LyXText(bv_);
 419                         resizeInsets(bv_);
 420                         bv_->text->init(bv_);
 421                 }
 422
 423                 par = bv_->text->ownerParagraphs().end();
 424                 selstartpar = bv_->text->ownerParagraphs().end();
 425                 selendpar = bv_->text->ownerParagraphs().end();
 426         }
 427
 428         if (par != bv_->text->ownerParagraphs().end()) {
 429                 bv_->text->selection.set(true);
 430                 // At this point just to avoid the Delete-Empty-Paragraph-
 431                 // Mechanism when setting the cursor.
 432                 bv_->text->selection.mark(mark_set);
 433                 if (selection) {
 434                         bv_->text->setCursor(selstartpar, selstartpos);
 435                         bv_->text->selection.cursor = bv_->text->cursor;
 436                         bv_->text->setCursor(selendpar, selendpos);
 437                         bv_->text->setSelection();
 438                         bv_->text->setCursor(par, pos);
 439                 } else {
 440                         bv_->text->setCursor(par, pos);
 441                         bv_->text->selection.cursor = bv_->text->cursor;
 442                         bv_->text->selection.set(false);
 443                 }
 444                 // remake the inset locking
 445                 bv_->theLockingInset(the_locking_inset);
 446         }
 447
 448         bv_->text->top_y(screen().topCursorVisible(bv_->text));
 449
 450         switchKeyMap();
 451         owner_->busy(false);
 452
 453         // reset the "Formatting..." message
 454         owner_->clearMessage();
 455
 456         updateScrollbar();
 457
 458         return 0;
 459 }
 460
 461
 462 void BufferView::Pimpl::repaint()
 463 {
 464         // Regenerate the screen.
 465         screen().redraw(bv_->text, bv_);
 466 }
 467
 468
 469 void BufferView::Pimpl::updateScrollbar()
 470 {
 471         if (!bv_->text) {
 472                 lyxerr[Debug::GUI] << "no text in updateScrollbar" << endl;
 473                 workarea().setScrollbarParams(0, 0, 0);
 474                 return;
 475         }
 476
 477         LyXText const & t = *bv_->text;
 478
 479         lyxerr[Debug::GUI] << "Updating scrollbar: h " << t.height << ", top_y() "
 480                 << t.top_y() << ", default height " << defaultRowHeight() << endl;
 481
 482         workarea().setScrollbarParams(t.height, t.top_y(), defaultRowHeight());
 483 }
 484
 485
 486 void BufferView::Pimpl::scrollDocView(int value)
 487 {
 488         lyxerr[Debug::GUI] << "scrollDocView of " << value << endl;
 489
 490         if (!buffer_)
 491                 return;
 492
 493         screen().hideCursor();
 494
 495         screen().draw(bv_->text, bv_, value);
 496
 497         if (!lyxrc.cursor_follows_scrollbar)
 498                 return;
 499
 500         LyXText * vbt = bv_->text;
 501
 502         int const height = defaultRowHeight();
 503         int const first = static_cast<int>((bv_->text->top_y() + height));
 504         int const last = static_cast<int>((bv_->text->top_y() + workarea().workHeight() - height));
 505
 506         if (vbt->cursor.y() < first)
 507                 vbt->setCursorFromCoordinates(0, first);
 508         else if (vbt->cursor.y() > last)
 509                 vbt->setCursorFromCoordinates(0, last);
 510
 511         owner_->updateLayoutChoice();
 512 }
 513
 514
 515 void BufferView::Pimpl::scroll(int lines)
 516 {
 517         if (!buffer_) {
 518                 return;
 519         }
 520
 521         LyXText const * t = bv_->text;
 522         int const line_height = defaultRowHeight();
 523
 524         // The new absolute coordinate
 525         int new_top_y = t->top_y() + lines * line_height;
 526
 527         // Restrict to a valid value
 528         new_top_y = std::min(t->height - 4 * line_height, new_top_y);
 529         new_top_y = std::max(0, new_top_y);
 530
 531         scrollDocView(new_top_y);
 532
 533         // Update the scrollbar.
 534         workarea().setScrollbarParams(t->height, t->top_y(), defaultRowHeight());
 535 }
 536
 537
 538 void BufferView::Pimpl::workAreaKeyPress(LyXKeySymPtr key,
 539                                          key_modifier::state state)
 540 {
 541         bv_->owner()->getLyXFunc().processKeySym(key, state);
 542
 543         /* This is perhaps a bit of a hack. When we move
 544          * around, or type, it's nice to be able to see
 545          * the cursor immediately after the keypress. So
 546          * we reset the toggle timeout and force the visibility
 547          * of the cursor. Note we cannot do this inside
 548          * dispatch() itself, because that's called recursively.
 549          */
 550         if (available()) {
 551                 cursor_timeout.restart();
 552                 screen().showCursor(*bv_);
 553         }
 554 }
 555
 556
 557 void BufferView::Pimpl::selectionRequested()
 558 {
 559         static string sel;
 560
 561         if (!available())
 562                 return;
 563
 564         LyXText * text = bv_->getLyXText();
 565
 566         if (text->selection.set() &&
 567                 (!bv_->text->xsel_cache.set() ||
 568                  text->selection.start != bv_->text->xsel_cache.start ||
 569                  text->selection.end != bv_->text->xsel_cache.end))
 570         {
 571                 bv_->text->xsel_cache = text->selection;
 572                 sel = text->selectionAsString(bv_->buffer(), false);
 573         } else if (!text->selection.set()) {
 574                 sel = string();
 575                 bv_->text->xsel_cache.set(false);
 576         }
 577         if (!sel.empty()) {
 578                 workarea().putClipboard(sel);
 579         }
 580 }
 581
 582
 583 void BufferView::Pimpl::selectionLost()
 584 {
 585         if (available()) {
 586                 screen().hideCursor();
 587                 toggleSelection();
 588                 bv_->getLyXText()->clearSelection();
 589                 bv_->text->xsel_cache.set(false);
 590         }
 591 }
 592
 593
 594 void BufferView::Pimpl::workAreaResize()
 595 {
 596         static int work_area_width;
 597         static int work_area_height;
 598
 599         bool const widthChange = workarea().workWidth() != work_area_width;
 600         bool const heightChange = workarea().workHeight() != work_area_height;
 601
 602         // update from work area
 603         work_area_width = workarea().workWidth();
 604         work_area_height = workarea().workHeight();
 605
 606         if (buffer_ != 0) {
 607                 if (widthChange) {
 608                         // The visible LyXView need a resize
 609                         resizeCurrentBuffer();
 610
 611                         // Remove all texts from the textcache
 612                         // This is not _really_ what we want to do. What
 613                         // we really want to do is to delete in textcache
 614                         // that does not have a BufferView with matching
 615                         // width, but as long as we have only one BufferView
 616                         // deleting all gives the same result.
 617                         if (lyxerr.debugging())
 618                                 textcache.show(lyxerr, "Expose delete all");
 619                         textcache.clear();
 620                         // FIXME: this is already done in resizeCurrentBuffer() ??
 621                         resizeInsets(bv_);
 622                 } else if (heightChange) {
 623                         // fitCursor() ensures we don't jump back
 624                         // to the start of the document on vertical
 625                         // resize
 626                         fitCursor();
 627                 }
 628         }
 629
 630         if (widthChange || heightChange) {
 631                 repaint();
 632         }
 633
 634         // always make sure that the scrollbar is sane.
 635         updateScrollbar();
 636         owner_->updateLayoutChoice();
 637         return;
 638 }
 639
 640
 641 void BufferView::Pimpl::update()
 642 {
 643         if (!bv_->theLockingInset() || !bv_->theLockingInset()->nodraw()) {
 644                 screen().update(*bv_);
 645                 bv_->text->clearPaint();
 646         }
 647 }
 648
 649
 650 void BufferView::Pimpl::update(LyXText * text, BufferView::UpdateCodes f)
 651 {
 652         if (!text->selection.set() && (f & SELECT)) {
 653                 text->selection.cursor = text->cursor;
 654         }
 655
 656         text->partialRebreak();
 657
 658         if (text->inset_owner) {
 659                 text->inset_owner->setUpdateStatus(InsetText::NONE);
 660                 updateInset(text->inset_owner);
 661         } else {
 662                 update();
 663         }
 664 }
 665
 666
 667 void BufferView::Pimpl::update(BufferView::UpdateCodes f)
 668 {
 669         LyXText * text = bv_->text;
 670
 671         if (!text->selection.set() && (f & SELECT)) {
 672                 text->selection.cursor = text->cursor;
 673         }
 674
 675         text->partialRebreak();
 676
 677         if (text->inset_owner) {
 678                 text->inset_owner->setUpdateStatus(InsetText::NONE);
 679                 updateInset(text->inset_owner);
 680         } else {
 681                 update();
 682         }
 683 }
 684
 685
 686 // Callback for cursor timer
 687 void BufferView::Pimpl::cursorToggle()
 688 {
 689         if (!buffer_) {
 690                 cursor_timeout.restart();
 691                 return;
 692         }
 693
 694         screen().toggleCursor(*bv_);
 695
 696         cursor_timeout.restart();
 697 }
 698
 699
 700 bool BufferView::Pimpl::available() const
 701 {
 702         if (buffer_ && bv_->text)
 703                 return true;
 704         return false;
 705 }
 706
 707
 708 Change const BufferView::Pimpl::getCurrentChange()
 709 {
 710         if (!bv_->buffer()->params.tracking_changes)
 711                 return Change(Change::UNCHANGED);
 712
 713         LyXText * t(bv_->getLyXText());
 714
 715         if (!t->selection.set())
 716                 return Change(Change::UNCHANGED);
 717
 718         LyXCursor const & cur(t->selection.start);
 719         return cur.par()->lookupChangeFull(cur.pos());
 720 }
 721
 722
 723 void BufferView::Pimpl::beforeChange(LyXText * text)
 724 {
 725         toggleSelection();
 726         text->clearSelection();
 727 }
 728
 729
 730 void BufferView::Pimpl::savePosition(unsigned int i)
 731 {
 732         if (i >= saved_positions_num)
 733                 return;
 734         saved_positions[i] = Position(buffer_->fileName(),
 735                                       bv_->text->cursor.par()->id(),
 736                                       bv_->text->cursor.pos());
 737         if (i > 0)
 738                 owner_->message(bformat(_("Saved bookmark %1$s"), tostr(i)));
 739 }
 740
 741
 742 void BufferView::Pimpl::restorePosition(unsigned int i)
 743 {
 744         if (i >= saved_positions_num)
 745                 return;
 746
 747         string const fname = saved_positions[i].filename;
 748
 749         beforeChange(bv_->text);
 750
 751         if (fname != buffer_->fileName()) {
 752                 Buffer * b;
 753                 if (bufferlist.exists(fname))
 754                         b = bufferlist.getBuffer(fname);
 755                 else {
 756                         b = bufferlist.newBuffer(fname);
 757                         ::loadLyXFile(b, fname); // don't ask, just load it
 758                 }
 759                 if (b != 0)
 760                         buffer(b);
 761         }
 762
 763         ParIterator par = buffer_->getParFromID(saved_positions[i].par_id);
 764         if (par == buffer_->par_iterator_end())
 765                 return;
 766
 767         bv_->text->setCursor(par.pit(),
 768                              min(par->size(), saved_positions[i].par_pos));
 769
 770         update(BufferView::SELECT);
 771         if (i > 0)
 772                 owner_->message(bformat(_("Moved to bookmark %1$s"), tostr(i)));
 773 }
 774
 775
 776 bool BufferView::Pimpl::isSavedPosition(unsigned int i)
 777 {
 778         if (i >= saved_positions_num)
 779                 return false;
 780
 781         return !saved_positions[i].filename.empty();
 782 }
 783
 784
 785 void BufferView::Pimpl::switchKeyMap()
 786 {
 787         if (!lyxrc.rtl_support)
 788                 return;
 789
 790         LyXText * text = bv_->getLyXText();
 791         if (text->real_current_font.isRightToLeft()
 792             && !(bv_->theLockingInset()
 793                  && bv_->theLockingInset()->lyxCode() == Inset::ERT_CODE))
 794         {
 795                 if (owner_->getIntl().keymap == Intl::PRIMARY)
 796                         owner_->getIntl().KeyMapSec();
 797         } else {
 798                 if (owner_->getIntl().keymap == Intl::SECONDARY)
 799                         owner_->getIntl().KeyMapPrim();
 800         }
 801 }
 802
 803
 804 void BufferView::Pimpl::insetUnlock()
 805 {
 806         if (bv_->theLockingInset()) {
 807                 bv_->theLockingInset()->insetUnlock(bv_);
 808                 bv_->theLockingInset(0);
 809                 finishUndo();
 810         }
 811 }
 812
 813
 814 void BufferView::Pimpl::toggleSelection(bool b)
 815 {
 816         if (bv_->theLockingInset())
 817                 bv_->theLockingInset()->toggleSelection(bv_, b);
 818         screen().toggleSelection(bv_->text, bv_, b);
 819 }
 820
 821
 822 void BufferView::Pimpl::toggleToggle()
 823 {
 824         screen().toggleToggle(bv_->text, bv_);
 825 }
 826
 827
 828 void BufferView::Pimpl::center()
 829 {
 830         LyXText * t = bv_->text;
 831
 832         beforeChange(t);
 833         int const half_height = workarea().workHeight() / 2;
 834         int new_y = 0;
 835
 836         if (t->cursor.y() > half_height) {
 837                 new_y = t->cursor.y() - half_height;
 838         }
 839
 840         // FIXME: look at this comment again ...
 841
 842         // FIXME: can we do this w/o calling screen directly ?
 843         // This updates top_y() but means the fitCursor() call
 844         // from the update(FITCUR) doesn't realise that we might
 845         // have moved (e.g. from GOTOPARAGRAPH), so doesn't cause
 846         // the scrollbar to be updated as it should, so we have
 847         // to do it manually. Any operation that does a center()
 848         // and also might have moved top_y() must make sure to call
 849         // updateScrollbar() currently. Never mind that this is a
 850         // pretty obfuscated way of updating t->top_y()
 851         screen().draw(t, bv_, new_y);
 852
 853         update(BufferView::SELECT);
 854 }
 855
 856
 857 void BufferView::Pimpl::stuffClipboard(string const & stuff) const
 858 {
 859         workarea().putClipboard(stuff);
 860 }
 861
 862
 863 /*
 864  * Dispatch functions for actions which can be valid for BufferView->text
 865  * and/or InsetText->text!!!
 866  */
 867
 868
 869 Inset * BufferView::Pimpl::getInsetByCode(Inset::Code code)
 870 {
 871 #if 0
 872         LyXCursor cursor = bv_->getLyXText()->cursor;
 873         Buffer::inset_iterator it =
 874                 find_if(Buffer::inset_iterator(
 875                         cursor.par(), cursor.pos()),
 876                         buffer_->inset_iterator_end(),
 877                         lyx::compare_memfun(&Inset::lyxCode, code));
 878         return it != buffer_->inset_iterator_end() ? (*it) : 0;
 879 #else
 880         // Ok, this is a little bit too brute force but it
 881         // should work for now. Better infrastructure is comming. (Lgb)
 882
 883         Buffer * b = bv_->buffer();
 884         LyXCursor cursor = bv_->getLyXText()->cursor;
 885
 886         Buffer::inset_iterator beg = b->inset_iterator_begin();
 887         Buffer::inset_iterator end = b->inset_iterator_end();
 888
 889         bool cursor_par_seen = false;
 890
 891         for (; beg != end; ++beg) {
 892                 if (beg.getPar() == cursor.par()) {
 893                         cursor_par_seen = true;
 894                 }
 895                 if (cursor_par_seen) {
 896                         if (beg.getPar() == cursor.par()
 897                             && beg.getPos() >= cursor.pos()) {
 898                                 break;
 899                         } else if (beg.getPar() != cursor.par()) {
 900                                 break;
 901                         }
 902                 }
 903
 904         }
 905         if (beg != end) {
 906                 // Now find the first inset that matches code.
 907                 for (; beg != end; ++beg) {
 908                         if (beg->lyxCode() == code) {
 909                                 return &(*beg);
 910                         }
 911                 }
 912         }
 913         return 0;
 914 #endif
 915 }
 916
 917
 918 void BufferView::Pimpl::MenuInsertLyXFile(string const & filen)
 919 {
 920         string filename = filen;
 921
 922         if (filename.empty()) {
 923                 // Launch a file browser
 924                 string initpath = lyxrc.document_path;
 925
 926                 if (available()) {
 927                         string const trypath = owner_->buffer()->filePath();
 928                         // If directory is writeable, use this as default.
 929                         if (IsDirWriteable(trypath))
 930                                 initpath = trypath;
 931                 }
 932
 933                 FileDialog fileDlg(_("Select LyX document to insert"),
 934                         LFUN_FILE_INSERT,
 935                         make_pair(string(_("Documents|#o#O")),
 936                                   string(lyxrc.document_path)),
 937                         make_pair(string(_("Examples|#E#e")),
 938                                   string(AddPath(system_lyxdir, "examples"))));
 939
 940                 FileDialog::Result result =
 941                         fileDlg.open(initpath,
 942                                        _("*.lyx| LyX Documents (*.lyx)"));
 943
 944                 if (result.first == FileDialog::Later)
 945                         return;
 946
 947                 filename = result.second;
 948
 949                 // check selected filename
 950                 if (filename.empty()) {
 951                         owner_->message(_("Canceled."));
 952                         return;
 953                 }
 954         }
 955
 956         // get absolute path of file and add ".lyx" to the filename if
 957         // necessary
 958         filename = FileSearch(string(), filename, "lyx");
 959
 960         string const disp_fn = MakeDisplayPath(filename);
 961         owner_->message(bformat(_("Inserting document %1$s..."), disp_fn));
 962         if (bv_->insertLyXFile(filename))
 963                 owner_->message(bformat(_("Document %1$s inserted."),
 964                                         disp_fn));
 965         else
 966                 owner_->message(bformat(_("Could not insert document %1$s"),
 967                                         disp_fn));
 968
 969 #warning remove this if update() is gone
 970         bv_->text->fullRebreak();
 971 }
 972
 973
 974 void BufferView::Pimpl::trackChanges()
 975 {
 976         Buffer * buf(bv_->buffer());
 977         bool const tracking(buf->params.tracking_changes);
 978
 979         if (!tracking) {
 980                 ParIterator const end = buf->par_iterator_end();
 981                 for (ParIterator it = buf->par_iterator_begin(); it != end; ++it)
 982                         it->trackChanges();
 983                 buf->params.tracking_changes = true;
 984
 985                 // we cannot allow undos beyond the freeze point
 986                 buf->undostack.clear();
 987         } else {
 988                 update(BufferView::SELECT);
 989                 bv_->text->setCursor(buf->paragraphs.begin(), 0);
 990 #warning changes FIXME
 991                 //moveCursorUpdate(false);
 992
 993                 bool found = lyxfind::findNextChange(bv_);
 994                 if (found) {
 995                         owner_->getDialogs().show("changes");
 996                         return;
 997                 }
 998
 999                 ParIterator const end = buf->par_iterator_end();
1000                 for (ParIterator it = buf->par_iterator_begin(); it != end; ++it)
1001                         it->untrackChanges();
1002                 buf->params.tracking_changes = false;
1003         }
1004
1005         buf->redostack.clear();
1006 }
1007
1008
1009 // Doesn't go through lyxfunc, so we need to update the
1010 // layout choice etc. ourselves
1011 bool BufferView::Pimpl::workAreaDispatch(FuncRequest const & ev_in)
1012 {
1013         // e.g. Qt mouse press when no buffer
1014         if (!available())
1015                 return false;
1016
1017         screen().hideCursor();
1018
1019         // Make sure that the cached BufferView is correct.
1020         FuncRequest ev = ev_in;
1021         ev.setView(bv_);
1022
1023         bool const res = dispatch(ev);
1024
1025         // see workAreaKeyPress
1026         cursor_timeout.restart();
1027         screen().showCursor(*bv_);
1028
1029         // FIXME: we should skip these when selecting
1030         bv_->owner()->updateLayoutChoice();
1031         bv_->owner()->updateToolbar();
1032         bv_->fitCursor();
1033
1034         // slight hack: this is only called currently when
1035         // we clicked somewhere, so we force through the display
1036         // of the new status here.
1037         bv_->owner()->clearMessage();
1038
1039         return res;
1040 }
1041
1042
1043 bool BufferView::Pimpl::dispatch(FuncRequest const & ev_in)
1044 {
1045         // Make sure that the cached BufferView is correct.
1046         FuncRequest ev = ev_in;
1047         ev.setView(bv_);
1048
1049         lyxerr[Debug::ACTION] << "BufferView::Pimpl::Dispatch:"
1050                 << " action[" << ev.action << ']'
1051                 << " arg[" << ev.argument << ']'
1052                 << " x[" << ev.x << ']'
1053                 << " y[" << ev.y << ']'
1054                 << " button[" << ev.button() << ']'
1055                 << endl;
1056
1057         LyXTextClass const & tclass = buffer_->params.getLyXTextClass();
1058
1059         switch (ev.action) {
1060
1061         case LFUN_SCROLL_INSET:
1062                 // this is not handled here as this function is only active
1063                 // if we have a locking_inset and that one is (or contains)
1064                 // a tabular-inset
1065                 break;
1066
1067         case LFUN_FILE_INSERT:
1068                 MenuInsertLyXFile(ev.argument);
1069                 break;
1070
1071         case LFUN_FILE_INSERT_ASCII_PARA:
1072                 InsertAsciiFile(bv_, ev.argument, true);
1073                 break;
1074
1075         case LFUN_FILE_INSERT_ASCII:
1076                 InsertAsciiFile(bv_, ev.argument, false);
1077                 break;
1078
1079         case LFUN_LANGUAGE:
1080                 lang(bv_, ev.argument);
1081                 switchKeyMap();
1082                 owner_->view_state_changed();
1083                 break;
1084
1085         case LFUN_EMPH:
1086                 emph(bv_);
1087                 owner_->view_state_changed();
1088                 break;
1089
1090         case LFUN_BOLD:
1091                 bold(bv_);
1092                 owner_->view_state_changed();
1093                 break;
1094
1095         case LFUN_NOUN:
1096                 noun(bv_);
1097                 owner_->view_state_changed();
1098                 break;
1099
1100         case LFUN_CODE:
1101                 code(bv_);
1102                 owner_->view_state_changed();
1103                 break;
1104
1105         case LFUN_SANS:
1106                 sans(bv_);
1107                 owner_->view_state_changed();
1108                 break;
1109
1110         case LFUN_ROMAN:
1111                 roman(bv_);
1112                 owner_->view_state_changed();
1113                 break;
1114
1115         case LFUN_DEFAULT:
1116                 styleReset(bv_);
1117                 owner_->view_state_changed();
1118                 break;
1119
1120         case LFUN_UNDERLINE:
1121                 underline(bv_);
1122                 owner_->view_state_changed();
1123                 break;
1124
1125         case LFUN_FONT_SIZE:
1126                 fontSize(bv_, ev.argument);
1127                 owner_->view_state_changed();
1128                 break;
1129
1130         case LFUN_FONT_STATE:
1131                 owner_->getLyXFunc().setMessage(currentState(bv_));
1132                 break;
1133
1134         case LFUN_INSERT_LABEL: {
1135                 // Try and generate a valid label
1136                 string const contents = ev.argument.empty() ?
1137                         getPossibleLabel(*bv_) : ev.argument;
1138                 InsetCommandParams icp("label", contents);
1139                 string data = InsetCommandMailer::params2string("label", icp);
1140                 owner_->getDialogs().show("label", data, 0);
1141         }
1142         break;
1143
1144         case LFUN_BOOKMARK_SAVE:
1145                 savePosition(strToUnsignedInt(ev.argument));
1146                 break;
1147
1148         case LFUN_BOOKMARK_GOTO:
1149                 restorePosition(strToUnsignedInt(ev.argument));
1150                 break;
1151
1152         case LFUN_REF_GOTO: {
1153                 string label = ev.argument;
1154                 if (label.empty()) {
1155                         InsetRef * inset =
1156                                 static_cast<InsetRef*>(getInsetByCode(Inset::REF_CODE));
1157                         if (inset) {
1158                                 label = inset->getContents();
1159                                 savePosition(0);
1160                         }
1161                 }
1162
1163                 if (!label.empty())
1164                         bv_->gotoLabel(label);
1165         }
1166         break;
1167
1168         // --- accented characters ---------------------------
1169
1170         case LFUN_UMLAUT:
1171         case LFUN_CIRCUMFLEX:
1172         case LFUN_GRAVE:
1173         case LFUN_ACUTE:
1174         case LFUN_TILDE:
1175         case LFUN_CEDILLA:
1176         case LFUN_MACRON:
1177         case LFUN_DOT:
1178         case LFUN_UNDERDOT:
1179         case LFUN_UNDERBAR:
1180         case LFUN_CARON:
1181         case LFUN_SPECIAL_CARON:
1182         case LFUN_BREVE:
1183         case LFUN_TIE:
1184         case LFUN_HUNG_UMLAUT:
1185         case LFUN_CIRCLE:
1186         case LFUN_OGONEK:
1187                 if (ev.argument.empty()) {
1188                         // As always...
1189                         owner_->getLyXFunc().handleKeyFunc(ev.action);
1190                 } else {
1191                         owner_->getLyXFunc().handleKeyFunc(ev.action);
1192                         owner_->getIntl().getTransManager()
1193                                 .TranslateAndInsert(ev.argument[0], bv_->getLyXText());
1194                         update(bv_->getLyXText(), BufferView::SELECT);
1195                 }
1196                 break;
1197
1198         case LFUN_MATH_MACRO:
1199         case LFUN_MATH_DELIM:
1200         case LFUN_INSERT_MATRIX:
1201         case LFUN_INSERT_MATH:
1202         case LFUN_MATH_IMPORT_SELECTION: // Imports LaTeX from the X selection
1203         case LFUN_MATH_DISPLAY:          // Open or create a displayed math inset
1204         case LFUN_MATH_MODE:             // Open or create an inlined math inset
1205                 mathDispatch(ev);
1206                 break;
1207
1208         case LFUN_INSET_APPLY: {
1209                 string const name = ev.getArg(0);
1210
1211                 InsetBase * inset = owner_->getDialogs().getOpenInset(name);
1212                 if (inset) {
1213                         // This works both for 'original' and 'mathed' insets.
1214                         // Note that the localDispatch performs updateInset
1215                         // also.
1216                         FuncRequest fr(bv_, LFUN_INSET_MODIFY, ev.argument);
1217                         inset->localDispatch(fr);
1218                 } else {
1219                         FuncRequest fr(bv_, LFUN_INSET_INSERT, ev.argument);
1220                         dispatch(fr);
1221                 }
1222         }
1223         break;
1224
1225         case LFUN_INSET_INSERT: {
1226                 Inset * inset = createInset(ev);
1227                 if (inset && insertInset(inset)) {
1228                         updateInset(inset);
1229
1230                         string const name = ev.getArg(0);
1231                         if (name == "bibitem") {
1232                                 // We need to do a redraw because the maximum
1233                                 // InsetBibitem width could have changed
1234 #warning please check you mean repaint() not update(),
1235 #warning and whether the repaint() is needed at all
1236                                 bv_->repaint();
1237                                 bv_->fitCursor();
1238                         }
1239                 } else {
1240                         delete inset;
1241                 }
1242         }
1243         break;
1244
1245         case LFUN_FLOAT_LIST:
1246                 if (tclass.floats().typeExist(ev.argument)) {
1247                         Inset * inset = new InsetFloatList(ev.argument);
1248                         if (!insertInset(inset, tclass.defaultLayoutName()))
1249                                 delete inset;
1250                 } else {
1251                         lyxerr << "Non-existent float type: "
1252                                << ev.argument << endl;
1253                 }
1254                 break;
1255
1256         case LFUN_LAYOUT_PARAGRAPH: {
1257                 Paragraph const * par = &*bv_->getLyXText()->cursor.par();
1258                 if (!par)
1259                         break;
1260
1261                 string data;
1262                 params2string(*par, data);
1263
1264                 data = "show\n" + data;
1265                 bv_->owner()->getDialogs().show("paragraph", data);
1266                 break;
1267         }
1268
1269         case LFUN_PARAGRAPH_UPDATE: {
1270                 if (!bv_->owner()->getDialogs().visible("paragraph"))
1271                         break;
1272                 Paragraph const * par = &*bv_->getLyXText()->cursor.par();
1273                 if (!par)
1274                         break;
1275
1276                 string data;
1277                 params2string(*par, data);
1278
1279                 // Will the paragraph accept changes from the dialog?
1280                 Inset * const inset = par->inInset();
1281                 bool const accept =
1282                         !(inset && inset->forceDefaultParagraphs(inset));
1283
1284                 data = "update " + tostr(accept) + '\n' + data;
1285                 bv_->owner()->getDialogs().update("paragraph", data);
1286                 break;
1287         }
1288
1289         case LFUN_PARAGRAPH_APPLY:
1290                 setParagraphParams(*bv_, ev.argument);
1291                 break;
1292
1293         case LFUN_THESAURUS_ENTRY:
1294         {
1295                 string arg = ev.argument;
1296
1297                 if (arg.empty()) {
1298                         arg = bv_->getLyXText()->selectionAsString(buffer_,
1299                                                                    false);
1300
1301                         // FIXME
1302                         if (arg.size() > 100 || arg.empty()) {
1303                                 // Get word or selection
1304                                 bv_->getLyXText()->selectWordWhenUnderCursor(lyx::WHOLE_WORD);
1305                                 arg = bv_->getLyXText()->selectionAsString(buffer_, false);
1306                                 // FIXME: where is getLyXText()->unselect(bv_) ?
1307                         }
1308                 }
1309
1310                 bv_->owner()->getDialogs().show("thesaurus", arg);
1311         }
1312                 break;
1313
1314         case LFUN_TRACK_CHANGES:
1315                 trackChanges();
1316                 break;
1317
1318         case LFUN_MERGE_CHANGES:
1319                 owner_->getDialogs().show("changes");
1320                 break;
1321
1322         case LFUN_ACCEPT_ALL_CHANGES: {
1323                 update(BufferView::SELECT);
1324                 bv_->text->setCursor(bv_->buffer()->paragraphs.begin(), 0);
1325 #warning FIXME changes
1326                 //moveCursorUpdate(false);
1327
1328                 while (lyxfind::findNextChange(bv_)) {
1329                         bv_->getLyXText()->acceptChange();
1330                 }
1331                 update(BufferView::SELECT);
1332                 break;
1333         }
1334
1335         case LFUN_REJECT_ALL_CHANGES: {
1336                 update(BufferView::SELECT);
1337                 bv_->text->setCursor(bv_->buffer()->paragraphs.begin(), 0);
1338 #warning FIXME changes
1339                 //moveCursorUpdate(false);
1340
1341                 while (lyxfind::findNextChange(bv_)) {
1342                         bv_->getLyXText()->rejectChange();
1343                 }
1344                 update(BufferView::SELECT);
1345                 break;
1346         }
1347
1348         case LFUN_ACCEPT_CHANGE: {
1349                 bv_->getLyXText()->acceptChange();
1350                 update(BufferView::SELECT);
1351                 break;
1352         }
1353
1354         case LFUN_REJECT_CHANGE: {
1355                 bv_->getLyXText()->rejectChange();
1356                 update(BufferView::SELECT);
1357                 break;
1358         }
1359
1360         case LFUN_UNKNOWN_ACTION:
1361                 ev.errorMessage(N_("Unknown function!"));
1362                 break;
1363
1364         default:
1365                 return bv_->getLyXText()->dispatch(FuncRequest(ev, bv_));
1366         } // end of switch
1367
1368         return true;
1369 }
1370
1371
1372 bool BufferView::Pimpl::insertInset(Inset * inset, string const & lout)
1373 {
1374         // if we are in a locking inset we should try to insert the
1375         // inset there otherwise this is a illegal function now
1376         if (bv_->theLockingInset()) {
1377                 if (bv_->theLockingInset()->insetAllowed(inset))
1378                         return bv_->theLockingInset()->insertInset(bv_, inset);
1379                 return false;
1380         }
1381
1382         // not quite sure if we want this...
1383         setCursorParUndo(bv_);
1384         freezeUndo();
1385
1386         beforeChange(bv_->text);
1387         if (!lout.empty()) {
1388                 update(BufferView::SELECT);
1389                 bv_->text->breakParagraph(bv_->buffer()->paragraphs);
1390                 update(BufferView::SELECT);
1391
1392                 if (!bv_->text->cursor.par()->empty()) {
1393                         bv_->text->cursorLeft(bv_);
1394
1395                         bv_->text->breakParagraph(bv_->buffer()->paragraphs);
1396                         update(BufferView::SELECT);
1397                 }
1398
1399                 string lres = lout;
1400                 LyXTextClass const & tclass =
1401                         buffer_->params.getLyXTextClass();
1402                 bool hasLayout = tclass.hasLayout(lres);
1403                 string lay = tclass.defaultLayoutName();
1404
1405                 if (hasLayout != false) {
1406                         // layout found
1407                         lay = lres;
1408                 } else {
1409                         // layout not fount using default
1410                         lay = tclass.defaultLayoutName();
1411                 }
1412
1413                 bv_->text->setLayout(lay);
1414
1415                 bv_->text->setParagraph(0, 0,
1416                                    0, 0,
1417                                    VSpace(VSpace::NONE), VSpace(VSpace::NONE),
1418                                    Spacing(),
1419                                    LYX_ALIGN_LAYOUT,
1420                                    string(),
1421                                    0);
1422                 update(BufferView::SELECT);
1423         }
1424
1425         bv_->text->insertInset(inset);
1426         update(BufferView::SELECT);
1427
1428         unFreezeUndo();
1429         return true;
1430 }
1431
1432
1433 void BufferView::Pimpl::updateInset(Inset * inset)
1434 {
1435         if (!inset || !available())
1436                 return;
1437
1438         // first check for locking insets
1439         if (bv_->theLockingInset()) {
1440                 if (bv_->theLockingInset() == inset) {
1441                         if (bv_->text->updateInset(inset)) {
1442                                 update();
1443                                 updateScrollbar();
1444                                 return;
1445                         }
1446                 } else if (bv_->theLockingInset()->updateInsetInInset(bv_, inset)) {
1447                         if (bv_->text->updateInset(bv_->theLockingInset())) {
1448                                 update();
1449                                 updateScrollbar();
1450                                 return;
1451                         }
1452                 }
1453         }
1454
1455         // then check if the inset is a top_level inset (has no owner)
1456         // if yes do the update as always otherwise we have to update the
1457         // toplevel inset where this inset is inside
1458         Inset * tl_inset = inset;
1459         while (tl_inset->owner())
1460                 tl_inset = tl_inset->owner();
1461         if (tl_inset == inset) {
1462                 update(BufferView::UPDATE);
1463                 if (bv_->text->updateInset(inset)) {
1464                         update(BufferView::SELECT);
1465                         return;
1466                 }
1467         } else if (static_cast<UpdatableInset *>(tl_inset)
1468                            ->updateInsetInInset(bv_, inset))
1469         {
1470                 if (bv_->text->updateInset(tl_inset)) {
1471                         update();
1472                         updateScrollbar();
1473                 }
1474         }
1475 }