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 Braustein
   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 "cursor.h"
  27 #include "debug.h"
  28 #include "dispatchresult.h"
  29 #include "factory.h"
  30 #include "FloatList.h"
  31 #include "funcrequest.h"
  32 #include "gettext.h"
  33 #include "intl.h"
  34 #include "iterators.h"
  35 #include "lyx_cb.h" // added for Dispatch functions
  36 #include "lyx_main.h"
  37 #include "lyxfind.h"
  38 #include "lyxfunc.h"
  39 #include "lyxtext.h"
  40 #include "lyxrc.h"
  41 #include "lastfiles.h"
  42 #include "paragraph.h"
  43 #include "paragraph_funcs.h"
  44 #include "ParagraphParameters.h"
  45 #include "undo.h"
  46 #include "vspace.h"
  47
  48 #include "insets/insetfloatlist.h"
  49 #include "insets/insetref.h"
  50
  51 #include "frontends/Alert.h"
  52 #include "frontends/Dialogs.h"
  53 #include "frontends/FileDialog.h"
  54 #include "frontends/LyXView.h"
  55 #include "frontends/LyXScreenFactory.h"
  56 #include "frontends/screen.h"
  57 #include "frontends/WorkArea.h"
  58 #include "frontends/WorkAreaFactory.h"
  59
  60 #include "graphics/Previews.h"
  61
  62 #include "mathed/formulabase.h"
  63
  64 #include "support/filetools.h"
  65 #include "support/path_defines.h"
  66 #include "support/tostr.h"
  67
  68 #include <boost/bind.hpp>
  69
  70 using bv_funcs::currentState;
  71
  72 using lyx::pos_type;
  73
  74 using lyx::support::AddPath;
  75 using lyx::support::bformat;
  76 using lyx::support::FileSearch;
  77 using lyx::support::IsDirWriteable;
  78 using lyx::support::MakeDisplayPath;
  79 using lyx::support::strToUnsignedInt;
  80 using lyx::support::system_lyxdir;
  81
  82 using std::endl;
  83 using std::make_pair;
  84 using std::min;
  85 using std::string;
  86
  87
  88 extern BufferList bufferlist;
  89
  90
  91 namespace {
  92
  93 unsigned int const saved_positions_num = 20;
  94
  95 // All the below connection objects are needed because of a bug in some
  96 // versions of GCC (<=2.96 are on the suspects list.) By having and assigning
  97 // to these connections we avoid a segfault upon startup, and also at exit.
  98 // (Lgb)
  99
 100 boost::signals::connection dispatchcon;
 101 boost::signals::connection timecon;
 102 boost::signals::connection doccon;
 103 boost::signals::connection resizecon;
 104 boost::signals::connection kpresscon;
 105 boost::signals::connection selectioncon;
 106 boost::signals::connection lostcon;
 107
 108
 109 } // anon namespace
 110
 111
 112 BufferView::Pimpl::Pimpl(BufferView * bv, LyXView * owner,
 113              int xpos, int ypos, int width, int height)
 114         : bv_(bv), owner_(owner), buffer_(0), cursor_timeout(400),
 115           using_xterm_cursor(false), cursor_(bv)
 116 {
 117         workarea_.reset(WorkAreaFactory::create(xpos, ypos, width, height));
 118         screen_.reset(LyXScreenFactory::create(workarea()));
 119
 120         // Setup the signals
 121         doccon = workarea().scrollDocView
 122                 .connect(boost::bind(&BufferView::Pimpl::scrollDocView, this, _1));
 123         resizecon = workarea().workAreaResize
 124                 .connect(boost::bind(&BufferView::Pimpl::workAreaResize, this));
 125         dispatchcon = workarea().dispatch
 126                 .connect(boost::bind(&BufferView::Pimpl::workAreaDispatch, this, _1));
 127         kpresscon = workarea().workAreaKeyPress
 128                 .connect(boost::bind(&BufferView::Pimpl::workAreaKeyPress, this, _1, _2));
 129         selectioncon = workarea().selectionRequested
 130                 .connect(boost::bind(&BufferView::Pimpl::selectionRequested, this));
 131         lostcon = workarea().selectionLost
 132                 .connect(boost::bind(&BufferView::Pimpl::selectionLost, this));
 133
 134         timecon = cursor_timeout.timeout
 135                 .connect(boost::bind(&BufferView::Pimpl::cursorToggle, this));
 136         cursor_timeout.start();
 137         saved_positions.resize(saved_positions_num);
 138 }
 139
 140
 141 void BufferView::Pimpl::addError(ErrorItem const & ei)
 142 {
 143         errorlist_.push_back(ei);
 144 }
 145
 146
 147 void BufferView::Pimpl::showReadonly(bool)
 148 {
 149         owner_->updateWindowTitle();
 150         owner_->getDialogs().updateBufferDependent(false);
 151 }
 152
 153
 154 void BufferView::Pimpl::connectBuffer(Buffer & buf)
 155 {
 156         if (errorConnection_.connected())
 157                 disconnectBuffer();
 158
 159         errorConnection_ = buf.error.connect(boost::bind(&BufferView::Pimpl::addError, this, _1));
 160         messageConnection_ = buf.message.connect(boost::bind(&LyXView::message, owner_, _1));
 161         busyConnection_ = buf.busy.connect(boost::bind(&LyXView::busy, owner_, _1));
 162         titleConnection_ = buf.updateTitles.connect(boost::bind(&LyXView::updateWindowTitle, owner_));
 163         timerConnection_ = buf.resetAutosaveTimers.connect(boost::bind(&LyXView::resetAutosaveTimer, owner_));
 164         readonlyConnection_ = buf.readonly.connect(boost::bind(&BufferView::Pimpl::showReadonly, this, _1));
 165         closingConnection_ = buf.closing.connect(boost::bind(&BufferView::Pimpl::buffer, this, (Buffer *)0));
 166 }
 167
 168
 169 void BufferView::Pimpl::disconnectBuffer()
 170 {
 171         errorConnection_.disconnect();
 172         messageConnection_.disconnect();
 173         busyConnection_.disconnect();
 174         titleConnection_.disconnect();
 175         timerConnection_.disconnect();
 176         readonlyConnection_.disconnect();
 177         closingConnection_.disconnect();
 178 }
 179
 180
 181 bool BufferView::Pimpl::newFile(string const & filename,
 182                                 string const & tname,
 183                                 bool isNamed)
 184 {
 185         Buffer * b = ::newFile(filename, tname, isNamed);
 186         buffer(b);
 187         return true;
 188 }
 189
 190
 191 bool BufferView::Pimpl::loadLyXFile(string const & filename, bool tolastfiles)
 192 {
 193         // get absolute path of file and add ".lyx" to the filename if
 194         // necessary
 195         string s = FileSearch(string(), filename, "lyx");
 196
 197         bool const found = !s.empty();
 198
 199         if (!found)
 200                 s = filename;
 201
 202         // file already open?
 203         if (bufferlist.exists(s)) {
 204                 string const file = MakeDisplayPath(s, 20);
 205                 string text = bformat(_("The document %1$s is already "
 206                                         "loaded.\n\nDo you want to revert "
 207                                         "to the saved version?"), file);
 208                 int const ret = Alert::prompt(_("Revert to saved document?"),
 209                         text, 0, 1,  _("&Revert"), _("&Switch to document"));
 210
 211                 if (ret != 0) {
 212                         buffer(bufferlist.getBuffer(s));
 213                         return true;
 214                 } else {
 215                         // FIXME: should be LFUN_REVERT
 216                         if (!bufferlist.close(bufferlist.getBuffer(s), false))
 217                                 return false;
 218                         // Fall through to new load. (Asger)
 219                 }
 220         }
 221
 222         Buffer * b;
 223
 224         if (found) {
 225                 b = bufferlist.newBuffer(s);
 226                 connectBuffer(*b);
 227                 if (!::loadLyXFile(b, s)) {
 228                         bufferlist.release(b);
 229                         return false;
 230                 }
 231         } else {
 232                 string text = bformat(_("The document %1$s does not yet "
 233                                         "exist.\n\nDo you want to create "
 234                                         "a new document?"), s);
 235                 int const ret = Alert::prompt(_("Create new document?"),
 236                          text, 0, 1, _("&Create"), _("Cancel"));
 237
 238                 if (ret == 0)
 239                         b = ::newFile(s, string(), true);
 240                 else
 241                         return false;
 242         }
 243
 244         buffer(b);
 245         bv_->showErrorList(_("Parse"));
 246
 247         if (tolastfiles)
 248                 LyX::ref().lastfiles().newFile(b->fileName());
 249
 250         return true;
 251 }
 252
 253
 254 WorkArea & BufferView::Pimpl::workarea() const
 255 {
 256         return *workarea_.get();
 257 }
 258
 259
 260 LyXScreen & BufferView::Pimpl::screen() const
 261 {
 262         return *screen_.get();
 263 }
 264
 265
 266 Painter & BufferView::Pimpl::painter() const
 267 {
 268         return workarea().getPainter();
 269 }
 270
 271
 272 void BufferView::Pimpl::top_y(int y)
 273 {
 274         top_y_ = y;
 275 }
 276
 277
 278 int BufferView::Pimpl::top_y() const
 279 {
 280         return top_y_;
 281 }
 282
 283
 284 void BufferView::Pimpl::buffer(Buffer * b)
 285 {
 286         lyxerr[Debug::INFO] << "Setting buffer in BufferView ("
 287                             << b << ')' << endl;
 288         if (buffer_) {
 289                 disconnectBuffer();
 290                 delete bv_->text;
 291                 bv_->text = 0;
 292         }
 293
 294         // set current buffer
 295         buffer_ = b;
 296
 297         top_y_ = 0;
 298
 299         // if we're quitting lyx, don't bother updating stuff
 300         if (quitting)
 301                 return;
 302
 303         // if we are closing the buffer, use the first buffer as current
 304         if (!buffer_)
 305                 buffer_ = bufferlist.first();
 306
 307         if (buffer_) {
 308                 lyxerr[Debug::INFO] << "Buffer addr: " << buffer_ << endl;
 309                 connectBuffer(*buffer_);
 310
 311                 // If we don't have a text object for this, we make one
 312                 if (bv_->text == 0)
 313                         resizeCurrentBuffer();
 314
 315                 // FIXME: needed when ?
 316                 top_y(screen().topCursorVisible(bv_->text));
 317
 318                 // Buffer-dependent dialogs should be updated or
 319                 // hidden. This should go here because some dialogs (eg ToC)
 320                 // require bv_->text.
 321                 owner_->getDialogs().updateBufferDependent(true);
 322         } else {
 323                 lyxerr[Debug::INFO] << "  No Buffer!" << endl;
 324                 owner_->getDialogs().hideBufferDependent();
 325         }
 326
 327         update();
 328         updateScrollbar();
 329         owner_->updateMenubar();
 330         owner_->updateToolbar();
 331         owner_->updateLayoutChoice();
 332         owner_->updateWindowTitle();
 333
 334         // Don't forget to update the Layout
 335         if (buffer_)
 336                 owner_->setLayout(bv_->text->cursorPar()->layout()->name());
 337
 338         if (lyx::graphics::Previews::activated() && buffer_)
 339                 lyx::graphics::Previews::get().generateBufferPreviews(*buffer_);
 340 }
 341
 342
 343 bool BufferView::Pimpl::fitCursor()
 344 {
 345         lyxerr << "BufferView::Pimpl::fitCursor." << endl;
 346
 347         int x,y;
 348         bv_->cursor().getPos(x, y);
 349
 350         if (y < top_y() || y > top_y() + workarea().workHeight()) {
 351                 int newtop = y - workarea().workHeight() / 2;
 352                 newtop = std::max(0, newtop);
 353                 top_y(newtop);
 354                 updateScrollbar();
 355                 return true;
 356         }
 357         return false;
 358
 359 // dead code below
 360         bool ret;
 361 #if 0
 362         UpdatableInset * tli =
 363                 static_cast<UpdatableInset *>(cursor_.innerInset());
 364         if (tli) {
 365                 tli->fitInsetCursor(bv_);
 366                 ret = true;
 367         } else {
 368                 ret = screen().fitCursor(bv_->text, bv_);
 369         }
 370 #endif
 371 #if 0
 372         ret = screen().fitCursor(bv_->text, bv_);
 373 #endif
 374
 375         //dispatch(FuncRequest(LFUN_PARAGRAPH_UPDATE));
 376
 377         // We need to always update, in case we did a
 378         // paste and we stayed anchored to a row, but
 379         // the actual height of the doc changed ...
 380         updateScrollbar();
 381         return ret;
 382 }
 383
 384
 385 void BufferView::Pimpl::redoCurrentBuffer()
 386 {
 387         lyxerr[Debug::INFO] << "BufferView::redoCurrentBuffer" << endl;
 388         if (buffer_ && bv_->text) {
 389                 resizeCurrentBuffer();
 390                 updateScrollbar();
 391                 owner_->updateLayoutChoice();
 392                 update();
 393         }
 394 }
 395
 396
 397 void BufferView::Pimpl::resizeCurrentBuffer()
 398 {
 399         lyxerr[Debug::INFO] << "resizeCurrentBuffer" << endl;
 400
 401         int par = -1;
 402         int selstartpar = -1;
 403         int selendpar = -1;
 404
 405         pos_type pos = 0;
 406         pos_type selstartpos = 0;
 407         pos_type selendpos = 0;
 408         bool selection = false;
 409         bool mark_set  = false;
 410
 411         owner_->busy(true);
 412
 413         owner_->message(_("Formatting document..."));
 414
 415         if (bv_->text) {
 416                 par = bv_->text->cursor.par();
 417                 pos = bv_->text->cursor.pos();
 418                 selstartpar = bv_->text->selection.start.par();
 419                 selstartpos = bv_->text->selection.start.pos();
 420                 selendpar = bv_->text->selection.end.par();
 421                 selendpos = bv_->text->selection.end.pos();
 422                 selection = bv_->text->selection.set();
 423                 mark_set = bv_->text->selection.mark();
 424                 bv_->text->fullRebreak();
 425                 update();
 426         } else {
 427                 bv_->text = new LyXText(bv_, 0, false, bv_->buffer()->paragraphs());
 428                 bv_->text->init(bv_);
 429         }
 430
 431         if (par != -1) {
 432                 bv_->text->selection.set(true);
 433                 // At this point just to avoid the Delete-Empty-Paragraph-
 434                 // Mechanism when setting the cursor.
 435                 bv_->text->selection.mark(mark_set);
 436                 if (selection) {
 437                         bv_->text->setCursor(selstartpar, selstartpos);
 438                         bv_->text->selection.cursor = bv_->text->cursor;
 439                         bv_->text->setCursor(selendpar, selendpos);
 440                         bv_->text->setSelection();
 441                         bv_->text->setCursor(par, pos);
 442                 } else {
 443                         bv_->text->setCursor(par, pos);
 444                         bv_->text->selection.cursor = bv_->text->cursor;
 445                         bv_->text->selection.set(false);
 446                 }
 447         }
 448
 449         top_y(screen().topCursorVisible(bv_->text));
 450
 451         switchKeyMap();
 452         owner_->busy(false);
 453
 454         // reset the "Formatting..." message
 455         owner_->clearMessage();
 456
 457         updateScrollbar();
 458 }
 459
 460
 461 void BufferView::Pimpl::updateScrollbar()
 462 {
 463         if (!bv_->text) {
 464                 lyxerr[Debug::GUI] << "no text in updateScrollbar" << endl;
 465                 workarea().setScrollbarParams(0, 0, 0);
 466                 return;
 467         }
 468
 469         LyXText const & t = *bv_->text;
 470
 471         lyxerr[Debug::GUI] << "Updating scrollbar: h " << t.height << ", top_y() "
 472                 << top_y() << ", default height " << defaultRowHeight() << endl;
 473
 474         workarea().setScrollbarParams(t.height, top_y(), defaultRowHeight());
 475 }
 476
 477
 478 void BufferView::Pimpl::scrollDocView(int value)
 479 {
 480         lyxerr[Debug::GUI] << "scrollDocView of " << value << endl;
 481
 482         if (!buffer_)
 483                 return;
 484
 485         screen().hideCursor();
 486
 487         top_y(value);
 488         screen().redraw(*bv_);
 489
 490         if (!lyxrc.cursor_follows_scrollbar)
 491                 return;
 492
 493         int const height = defaultRowHeight();
 494         int const first = top_y() + height;
 495         int const last = top_y() + workarea().workHeight() - height;
 496
 497         LyXText * text = bv_->text;
 498         if (text->cursor.y() < first)
 499                 text->setCursorFromCoordinates(0, first);
 500         else if (text->cursor.y() > last)
 501                 text->setCursorFromCoordinates(0, last);
 502
 503         owner_->updateLayoutChoice();
 504 }
 505
 506
 507 void BufferView::Pimpl::scroll(int lines)
 508 {
 509         if (!buffer_)
 510                 return;
 511
 512         LyXText const * t = bv_->text;
 513         int const line_height = defaultRowHeight();
 514
 515         // The new absolute coordinate
 516         int new_top_y = top_y() + lines * line_height;
 517
 518         // Restrict to a valid value
 519         new_top_y = std::min(t->height - 4 * line_height, new_top_y);
 520         new_top_y = std::max(0, new_top_y);
 521
 522         scrollDocView(new_top_y);
 523
 524         // Update the scrollbar.
 525         workarea().setScrollbarParams(t->height, top_y(), defaultRowHeight());
 526 }
 527
 528
 529 void BufferView::Pimpl::workAreaKeyPress(LyXKeySymPtr key,
 530                                          key_modifier::state state)
 531 {
 532         bv_->owner()->getLyXFunc().processKeySym(key, state);
 533
 534         /* This is perhaps a bit of a hack. When we move
 535          * around, or type, it's nice to be able to see
 536          * the cursor immediately after the keypress. So
 537          * we reset the toggle timeout and force the visibility
 538          * of the cursor. Note we cannot do this inside
 539          * dispatch() itself, because that's called recursively.
 540          */
 541         if (available()) {
 542                 cursor_timeout.restart();
 543                 screen().showCursor(*bv_);
 544         }
 545 }
 546
 547
 548 void BufferView::Pimpl::selectionRequested()
 549 {
 550         static string sel;
 551
 552         if (!available())
 553                 return;
 554
 555         LyXText * text = bv_->getLyXText();
 556
 557         if (text->selection.set() &&
 558                 (!bv_->text->xsel_cache.set() ||
 559                  text->selection.start != bv_->text->xsel_cache.start ||
 560                  text->selection.end != bv_->text->xsel_cache.end))
 561         {
 562                 bv_->text->xsel_cache = text->selection;
 563                 sel = text->selectionAsString(*bv_->buffer(), false);
 564         } else if (!text->selection.set()) {
 565                 sel = string();
 566                 bv_->text->xsel_cache.set(false);
 567         }
 568         if (!sel.empty()) {
 569                 workarea().putClipboard(sel);
 570         }
 571 }
 572
 573
 574 void BufferView::Pimpl::selectionLost()
 575 {
 576         if (available()) {
 577                 screen().hideCursor();
 578                 bv_->getLyXText()->clearSelection();
 579                 bv_->text->xsel_cache.set(false);
 580         }
 581 }
 582
 583
 584 void BufferView::Pimpl::workAreaResize()
 585 {
 586         static int work_area_width;
 587         static int work_area_height;
 588
 589         bool const widthChange = workarea().workWidth() != work_area_width;
 590         bool const heightChange = workarea().workHeight() != work_area_height;
 591
 592         // update from work area
 593         work_area_width = workarea().workWidth();
 594         work_area_height = workarea().workHeight();
 595
 596         if (buffer_ != 0) {
 597                 if (widthChange) {
 598                         // The visible LyXView need a resize
 599                         resizeCurrentBuffer();
 600                 }
 601         }
 602
 603         if (widthChange || heightChange)
 604                 update();
 605
 606         // always make sure that the scrollbar is sane.
 607         updateScrollbar();
 608         owner_->updateLayoutChoice();
 609 }
 610
 611
 612 void BufferView::Pimpl::update()
 613 {
 614         //lyxerr << "BufferView::update()" << endl;
 615         // fix cursor coordinate cache in case something went wrong
 616
 617         // check needed to survive LyX startup
 618         if (bv_->getLyXText()) {
 619                 // update all 'visible' paragraphs
 620                 ParagraphList::iterator beg;
 621                 ParagraphList::iterator end;
 622                 getParsInRange(buffer_->paragraphs(),
 623                                top_y(), top_y() + workarea().workHeight(),
 624                                beg, end);
 625                 bv_->text->redoParagraphs(beg, end);
 626                 bv_->getLyXText()->redoCursor();
 627                 updateScrollbar();
 628         }
 629         screen().redraw(*bv_);
 630 }
 631
 632
 633 // Callback for cursor timer
 634 void BufferView::Pimpl::cursorToggle()
 635 {
 636         if (!buffer_) {
 637                 cursor_timeout.restart();
 638                 return;
 639         }
 640
 641         screen().toggleCursor(*bv_);
 642         cursor_timeout.restart();
 643 }
 644
 645
 646 bool BufferView::Pimpl::available() const
 647 {
 648         return buffer_ && bv_->text;
 649 }
 650
 651
 652 Change const BufferView::Pimpl::getCurrentChange()
 653 {
 654         if (!bv_->buffer()->params().tracking_changes)
 655                 return Change(Change::UNCHANGED);
 656
 657         LyXText * text = bv_->getLyXText();
 658
 659         if (!text->selection.set())
 660                 return Change(Change::UNCHANGED);
 661
 662         return text->getPar(text->selection.start)
 663                 ->lookupChangeFull(text->selection.start.pos());
 664 }
 665
 666
 667 void BufferView::Pimpl::savePosition(unsigned int i)
 668 {
 669         if (i >= saved_positions_num)
 670                 return;
 671         saved_positions[i] = Position(buffer_->fileName(),
 672                                       bv_->text->cursorPar()->id(),
 673                                       bv_->text->cursor.pos());
 674         if (i > 0)
 675                 owner_->message(bformat(_("Saved bookmark %1$s"), tostr(i)));
 676 }
 677
 678
 679 void BufferView::Pimpl::restorePosition(unsigned int i)
 680 {
 681         if (i >= saved_positions_num)
 682                 return;
 683
 684         string const fname = saved_positions[i].filename;
 685
 686         bv_->text->clearSelection();
 687
 688         if (fname != buffer_->fileName()) {
 689                 Buffer * b = 0;
 690                 if (bufferlist.exists(fname))
 691                         b = bufferlist.getBuffer(fname);
 692                 else {
 693                         b = bufferlist.newBuffer(fname);
 694                         ::loadLyXFile(b, fname); // don't ask, just load it
 695                 }
 696                 if (b)
 697                         buffer(b);
 698         }
 699
 700         ParIterator par = buffer_->getParFromID(saved_positions[i].par_id);
 701         if (par == buffer_->par_iterator_end())
 702                 return;
 703
 704         bv_->text->setCursor(par.pit(),
 705                              min(par->size(), saved_positions[i].par_pos));
 706
 707         update();
 708         if (i > 0)
 709                 owner_->message(bformat(_("Moved to bookmark %1$s"), tostr(i)));
 710 }
 711
 712
 713 bool BufferView::Pimpl::isSavedPosition(unsigned int i)
 714 {
 715         return i < saved_positions_num && !saved_positions[i].filename.empty();
 716 }
 717
 718
 719 void BufferView::Pimpl::switchKeyMap()
 720 {
 721         if (!lyxrc.rtl_support)
 722                 return;
 723
 724         Intl & intl = owner_->getIntl();
 725         if (bv_->getLyXText()->real_current_font.isRightToLeft()) {
 726                 if (intl.keymap == Intl::PRIMARY)
 727                         intl.KeyMapSec();
 728         } else {
 729                 if (intl.keymap == Intl::SECONDARY)
 730                         intl.KeyMapPrim();
 731         }
 732 }
 733
 734
 735 void BufferView::Pimpl::center()
 736 {
 737         LyXText * text = bv_->text;
 738
 739         text->clearSelection();
 740         int const half_height = workarea().workHeight() / 2;
 741         int new_y = std::max(0, text->cursor.y() - half_height);
 742
 743         // FIXME: look at this comment again ...
 744         // This updates top_y() but means the fitCursor() call
 745         // from the update(FITCUR) doesn't realise that we might
 746         // have moved (e.g. from GOTOPARAGRAPH), so doesn't cause
 747         // the scrollbar to be updated as it should, so we have
 748         // to do it manually. Any operation that does a center()
 749         // and also might have moved top_y() must make sure to call
 750         // updateScrollbar() currently. Never mind that this is a
 751         // pretty obfuscated way of updating t->top_y()
 752         top_y(new_y);
 753         update();
 754 }
 755
 756
 757 void BufferView::Pimpl::stuffClipboard(string const & stuff) const
 758 {
 759         workarea().putClipboard(stuff);
 760 }
 761
 762
 763 InsetOld * BufferView::Pimpl::getInsetByCode(InsetOld::Code code)
 764 {
 765 #if 0
 766         LyXCursor cursor = bv_->getLyXText()->cursor;
 767         Buffer::inset_iterator it =
 768                 find_if(Buffer::inset_iterator(
 769                         cursorPar(), cursor.pos()),
 770                         buffer_->inset_iterator_end(),
 771                         lyx::compare_memfun(&Inset::lyxCode, code));
 772         return it != buffer_->inset_iterator_end() ? (*it) : 0;
 773 #else
 774         // Ok, this is a little bit too brute force but it
 775         // should work for now. Better infrastructure is coming. (Lgb)
 776
 777         Buffer * b = bv_->buffer();
 778         LyXText * text =  bv_->getLyXText();
 779
 780         Buffer::inset_iterator beg = b->inset_iterator_begin();
 781         Buffer::inset_iterator end = b->inset_iterator_end();
 782
 783         bool cursorPar_seen = false;
 784
 785         for (; beg != end; ++beg) {
 786                 if (beg.getPar() == text->cursorPar()) {
 787                         cursorPar_seen = true;
 788                 }
 789                 if (cursorPar_seen) {
 790                         if (beg.getPar() == text->cursorPar()
 791                             && beg.getPos() >= text->cursor.pos()) {
 792                                 break;
 793                         } else if (beg.getPar() != text->cursorPar()) {
 794                                 break;
 795                         }
 796                 }
 797
 798         }
 799         if (beg != end) {
 800                 // Now find the first inset that matches code.
 801                 for (; beg != end; ++beg) {
 802                         if (beg->lyxCode() == code) {
 803                                 return &(*beg);
 804                         }
 805                 }
 806         }
 807         return 0;
 808 #endif
 809 }
 810
 811
 812 void BufferView::Pimpl::MenuInsertLyXFile(string const & filen)
 813 {
 814         string filename = filen;
 815
 816         if (filename.empty()) {
 817                 // Launch a file browser
 818                 string initpath = lyxrc.document_path;
 819
 820                 if (available()) {
 821                         string const trypath = owner_->buffer()->filePath();
 822                         // If directory is writeable, use this as default.
 823                         if (IsDirWriteable(trypath))
 824                                 initpath = trypath;
 825                 }
 826
 827                 FileDialog fileDlg(_("Select LyX document to insert"),
 828                         LFUN_FILE_INSERT,
 829                         make_pair(string(_("Documents|#o#O")),
 830                                   string(lyxrc.document_path)),
 831                         make_pair(string(_("Examples|#E#e")),
 832                                   string(AddPath(system_lyxdir(), "examples"))));
 833
 834                 FileDialog::Result result =
 835                         fileDlg.open(initpath,
 836                                        _("*.lyx| LyX Documents (*.lyx)"));
 837
 838                 if (result.first == FileDialog::Later)
 839                         return;
 840
 841                 filename = result.second;
 842
 843                 // check selected filename
 844                 if (filename.empty()) {
 845                         owner_->message(_("Canceled."));
 846                         return;
 847                 }
 848         }
 849
 850         // get absolute path of file and add ".lyx" to the filename if
 851         // necessary
 852         filename = FileSearch(string(), filename, "lyx");
 853
 854         string const disp_fn = MakeDisplayPath(filename);
 855         owner_->message(bformat(_("Inserting document %1$s..."), disp_fn));
 856         if (bv_->insertLyXFile(filename))
 857                 owner_->message(bformat(_("Document %1$s inserted."),
 858                                         disp_fn));
 859         else
 860                 owner_->message(bformat(_("Could not insert document %1$s"),
 861                                         disp_fn));
 862 }
 863
 864
 865 void BufferView::Pimpl::trackChanges()
 866 {
 867         Buffer * buf(bv_->buffer());
 868         bool const tracking(buf->params().tracking_changes);
 869
 870         if (!tracking) {
 871                 ParIterator const end = buf->par_iterator_end();
 872                 for (ParIterator it = buf->par_iterator_begin(); it != end; ++it)
 873                         it->trackChanges();
 874                 buf->params().tracking_changes = true;
 875
 876                 // we cannot allow undos beyond the freeze point
 877                 buf->undostack().clear();
 878         } else {
 879                 update();
 880                 bv_->text->setCursor(0, 0);
 881 #warning changes FIXME
 882                 //moveCursorUpdate(false);
 883
 884                 bool found = lyx::find::findNextChange(bv_);
 885                 if (found) {
 886                         owner_->getDialogs().show("changes");
 887                         return;
 888                 }
 889
 890                 ParIterator const end = buf->par_iterator_end();
 891                 for (ParIterator it = buf->par_iterator_begin(); it != end; ++it)
 892                         it->untrackChanges();
 893                 buf->params().tracking_changes = false;
 894         }
 895
 896         buf->redostack().clear();
 897 }
 898
 899 #warning remove me
 900 LCursor theTempCursor(0);
 901
 902 namespace {
 903
 904         InsetOld * insetFromCoords(BufferView * bv, int x, int y)
 905         {
 906                 LyXText * text = bv->text;
 907                 InsetOld * inset = 0;
 908                 theTempCursor = LCursor(bv);
 909                 while (true) {
 910                         InsetOld * inset_hit = text->checkInsetHit(x, y);
 911                         if (!inset_hit)
 912                                 break;
 913                         inset = inset_hit;
 914                         if (!inset_hit->descendable())
 915                                 break;
 916                         text = inset_hit->getText(0);
 917                         lyxerr << "Hit inset: " << inset << " at x: " << x
 918                                 << " text: " << text << " y: " << y << endl;
 919                         theTempCursor.push(static_cast<UpdatableInset*>(inset));
 920                 }
 921                 return inset;
 922         }
 923
 924 }
 925
 926
 927 bool BufferView::Pimpl::workAreaDispatch(FuncRequest const & cmd)
 928 {
 929         switch (cmd.action) {
 930         case LFUN_MOUSE_PRESS:
 931         case LFUN_MOUSE_MOTION:
 932         case LFUN_MOUSE_RELEASE:
 933         case LFUN_MOUSE_DOUBLE:
 934         case LFUN_MOUSE_TRIPLE: {
 935                 // We pass those directly to the Bufferview, since
 936                 // otherwise selection handling breaks down
 937
 938                 // Doesn't go through lyxfunc, so we need to update
 939                 // the layout choice etc. ourselves
 940
 941                 // e.g. Qt mouse press when no buffer
 942                 if (!available())
 943                         return false;
 944
 945                 screen().hideCursor();
 946
 947                 // either the inset under the cursor or the surrounding LyXText will
 948                 // handle this event.
 949
 950                 // built temporary path to inset
 951                 InsetOld * inset = insetFromCoords(bv_, cmd.x, cmd.y);
 952                 FuncRequest cmd1(cmd, bv_);
 953                 DispatchResult res;
 954
 955                 // try to dispatch to that inset
 956                 if (inset) {
 957                         FuncRequest cmd2 = cmd1;
 958                         lyxerr << "dispatching action " << cmd2.action
 959                                 << " to inset " << inset << endl;
 960                         cmd2.x -= inset->x();
 961                         cmd2.y -= inset->y();
 962                         res = inset->dispatch(cmd2);
 963                         if (res.update()) {
 964                                 bv_->update();
 965                                 bv_->cursor().updatePos();
 966                         }
 967                         res.update(false);
 968                         switch (res.val()) {
 969                                 case FINISHED:
 970                                 case FINISHED_RIGHT:
 971                                 case FINISHED_UP:
 972                                 case FINISHED_DOWN:
 973                                         theTempCursor.pop();
 974                                         bv_->cursor() = theTempCursor;
 975                                         bv_->cursor().innerText()->setCursorFromCoordinates(cmd.x, top_y() + cmd.y);
 976                                         bv_->cursor().updatePos();
 977                                         bv_->fitCursor();
 978                                         return true;
 979                                 default:
 980                                         lyxerr << "not dispatched by inner inset val: " << res.val() << endl;
 981                                         break;
 982                         }
 983                 }
 984
 985                 // otherwise set cursor to surrounding LyXText
 986                 if (!res.dispatched()) {
 987                         lyxerr << "cursor is: " << bv_->cursor() << endl;
 988                         lyxerr << "dispatching " << cmd1
 989                                << " to surrounding LyXText "
 990                                << bv_->cursor().innerText() << endl;
 991                         bv_->cursor() = theTempCursor;
 992                         theTempCursor.dispatch(cmd1);
 993                         bv_->update();
 994                         bv_->cursor().updatePos();
 995                         //return DispatchResult(true, true);
 996                 }
 997                 // see workAreaKeyPress
 998                 cursor_timeout.restart();
 999                 screen().showCursor(*bv_);
1000
1001                 // FIXME: we should skip these when selecting
1002                 owner_->updateLayoutChoice();
1003                 owner_->updateToolbar();
1004 //              fitCursor();
1005
1006                 // slight hack: this is only called currently when we
1007                 // clicked somewhere, so we force through the display
1008                 // of the new status here.
1009                 owner_->clearMessage();
1010                 return true;
1011         }
1012
1013         default:
1014                 owner_->dispatch(cmd);
1015                 return true;
1016         }
1017 }
1018
1019
1020 bool BufferView::Pimpl::dispatch(FuncRequest const & ev_in)
1021 {
1022         // Make sure that the cached BufferView is correct.
1023         FuncRequest ev = ev_in;
1024         ev.setView(bv_);
1025
1026         lyxerr[Debug::ACTION] << "BufferView::Pimpl::Dispatch:"
1027                 << " action[" << ev.action << ']'
1028                 << " arg[" << ev.argument << ']'
1029                 << " x[" << ev.x << ']'
1030                 << " y[" << ev.y << ']'
1031                 << " button[" << ev.button() << ']'
1032                 << endl;
1033
1034         LyXTextClass const & tclass = buffer_->params().getLyXTextClass();
1035
1036         switch (ev.action) {
1037
1038         case LFUN_SCROLL_INSET:
1039                 // this is not handled here as this function is only active
1040                 // if we have a locking_inset and that one is (or contains)
1041                 // a tabular-inset
1042                 break;
1043
1044         case LFUN_FILE_INSERT:
1045                 MenuInsertLyXFile(ev.argument);
1046                 break;
1047
1048         case LFUN_FILE_INSERT_ASCII_PARA:
1049                 InsertAsciiFile(bv_, ev.argument, true);
1050                 break;
1051
1052         case LFUN_FILE_INSERT_ASCII:
1053                 InsertAsciiFile(bv_, ev.argument, false);
1054                 break;
1055
1056         case LFUN_FONT_STATE:
1057                 owner_->getLyXFunc().setMessage(currentState(bv_));
1058                 break;
1059
1060         case LFUN_INSERT_LABEL: {
1061                 // Try and generate a valid label
1062                 string const contents = ev.argument.empty() ?
1063                         getPossibleLabel(*bv_) : ev.argument;
1064                 InsetCommandParams icp("label", contents);
1065                 string data = InsetCommandMailer::params2string("label", icp);
1066                 owner_->getDialogs().show("label", data, 0);
1067                 break;
1068         }
1069
1070         case LFUN_BOOKMARK_SAVE:
1071                 savePosition(strToUnsignedInt(ev.argument));
1072                 break;
1073
1074         case LFUN_BOOKMARK_GOTO:
1075                 restorePosition(strToUnsignedInt(ev.argument));
1076                 break;
1077
1078         case LFUN_REF_GOTO: {
1079                 string label = ev.argument;
1080                 if (label.empty()) {
1081                         InsetRef * inset =
1082                                 static_cast<InsetRef*>(getInsetByCode(InsetOld::REF_CODE));
1083                         if (inset) {
1084                                 label = inset->getContents();
1085                                 savePosition(0);
1086                         }
1087                 }
1088
1089                 if (!label.empty())
1090                         bv_->gotoLabel(label);
1091         }
1092         break;
1093
1094         // --- accented characters ---------------------------
1095
1096         case LFUN_UMLAUT:
1097         case LFUN_CIRCUMFLEX:
1098         case LFUN_GRAVE:
1099         case LFUN_ACUTE:
1100         case LFUN_TILDE:
1101         case LFUN_CEDILLA:
1102         case LFUN_MACRON:
1103         case LFUN_DOT:
1104         case LFUN_UNDERDOT:
1105         case LFUN_UNDERBAR:
1106         case LFUN_CARON:
1107         case LFUN_SPECIAL_CARON:
1108         case LFUN_BREVE:
1109         case LFUN_TIE:
1110         case LFUN_HUNG_UMLAUT:
1111         case LFUN_CIRCLE:
1112         case LFUN_OGONEK:
1113                 if (ev.argument.empty()) {
1114                         // As always...
1115                         owner_->getLyXFunc().handleKeyFunc(ev.action);
1116                 } else {
1117                         owner_->getLyXFunc().handleKeyFunc(ev.action);
1118                         owner_->getIntl().getTransManager()
1119                                 .TranslateAndInsert(ev.argument[0], bv_->getLyXText());
1120                         update();
1121                 }
1122                 break;
1123
1124         case LFUN_MATH_MACRO:
1125         case LFUN_MATH_DELIM:
1126         case LFUN_INSERT_MATRIX:
1127         case LFUN_INSERT_MATH:
1128         case LFUN_MATH_IMPORT_SELECTION: // Imports LaTeX from the X selection
1129         case LFUN_MATH_DISPLAY:          // Open or create a displayed math inset
1130         case LFUN_MATH_MODE:             // Open or create an inlined math inset
1131                 mathDispatch(ev);
1132                 break;
1133
1134         case LFUN_INSET_APPLY: {
1135                 string const name = ev.getArg(0);
1136
1137                 InsetBase * inset = owner_->getDialogs().getOpenInset(name);
1138                 if (inset) {
1139                         // This works both for 'original' and 'mathed' insets.
1140                         // Note that the localDispatch performs update also.
1141                         FuncRequest fr(bv_, LFUN_INSET_MODIFY, ev.argument);
1142                         inset->dispatch(fr);
1143                 } else {
1144                         FuncRequest fr(bv_, LFUN_INSET_INSERT, ev.argument);
1145                         dispatch(fr);
1146                 }
1147         }
1148         break;
1149
1150         case LFUN_INSET_INSERT: {
1151                 InsetOld * inset = createInset(ev);
1152                 if (!inset || !insertInset(inset))
1153                         delete inset;
1154                 break;
1155         }
1156
1157         case LFUN_FLOAT_LIST:
1158                 if (tclass.floats().typeExist(ev.argument)) {
1159                         InsetOld * inset = new InsetFloatList(ev.argument);
1160                         if (!insertInset(inset, tclass.defaultLayoutName()))
1161                                 delete inset;
1162                 } else {
1163                         lyxerr << "Non-existent float type: "
1164                                << ev.argument << endl;
1165                 }
1166                 break;
1167
1168         case LFUN_LAYOUT_PARAGRAPH: {
1169                 string data;
1170                 params2string(*bv_->getLyXText()->cursorPar(), data);
1171                 data = "show\n" + data;
1172                 bv_->owner()->getDialogs().show("paragraph", data);
1173                 break;
1174         }
1175
1176         case LFUN_PARAGRAPH_UPDATE:
1177                 updateParagraphDialog();
1178                 break;
1179
1180         case LFUN_PARAGRAPH_APPLY:
1181                 setParagraphParams(*bv_, ev.argument);
1182                 break;
1183
1184         case LFUN_THESAURUS_ENTRY: {
1185                 string arg = ev.argument;
1186
1187                 if (arg.empty()) {
1188                         arg = bv_->getLyXText()->selectionAsString(*buffer_,
1189                                                                    false);
1190
1191                         // FIXME
1192                         if (arg.size() > 100 || arg.empty()) {
1193                                 // Get word or selection
1194                                 bv_->getLyXText()->selectWordWhenUnderCursor(lyx::WHOLE_WORD);
1195                                 arg = bv_->getLyXText()->selectionAsString(*buffer_, false);
1196                                 // FIXME: where is getLyXText()->unselect(bv_) ?
1197                         }
1198                 }
1199
1200                 bv_->owner()->getDialogs().show("thesaurus", arg);
1201                 break;
1202         }
1203
1204         case LFUN_TRACK_CHANGES:
1205                 trackChanges();
1206                 break;
1207
1208         case LFUN_MERGE_CHANGES:
1209                 owner_->getDialogs().show("changes");
1210                 break;
1211
1212         case LFUN_ACCEPT_ALL_CHANGES: {
1213                 bv_->text->setCursor(0, 0);
1214 #warning FIXME changes
1215                 //moveCursorUpdate(false);
1216
1217                 while (lyx::find::findNextChange(bv_))
1218                         bv_->getLyXText()->acceptChange();
1219
1220                 update();
1221                 break;
1222         }
1223
1224         case LFUN_REJECT_ALL_CHANGES: {
1225                 bv_->text->setCursor(0, 0);
1226 #warning FIXME changes
1227                 //moveCursorUpdate(false);
1228
1229                 while (lyx::find::findNextChange(bv_))
1230                         bv_->getLyXText()->rejectChange();
1231
1232                 update();
1233                 break;
1234         }
1235
1236         case LFUN_ACCEPT_CHANGE: {
1237                 bv_->getLyXText()->acceptChange();
1238                 update();
1239                 break;
1240         }
1241
1242         case LFUN_REJECT_CHANGE: {
1243                 bv_->getLyXText()->rejectChange();
1244                 update();
1245                 break;
1246         }
1247
1248         case LFUN_UNKNOWN_ACTION:
1249                 ev.errorMessage(N_("Unknown function!"));
1250                 break;
1251
1252         default:
1253                 return bv_->getLyXText()->dispatch(FuncRequest(ev, bv_)).dispatched();
1254         } // end of switch
1255
1256         return true;
1257 }
1258
1259
1260 bool BufferView::Pimpl::insertInset(InsetOld * inset, string const & lout)
1261 {
1262 #ifdef LOCK
1263         // if we are in a locking inset we should try to insert the
1264         // inset there otherwise this is a illegal function now
1265         if (bv_->theLockingInset()) {
1266                 if (bv_->theLockingInset()->insetAllowed(inset))
1267                         return bv_->theLockingInset()->insertInset(bv_, inset);
1268                 return false;
1269         }
1270 #endif
1271
1272         // not quite sure if we want this...
1273         bv_->text->recUndo(bv_->text->cursor.par());
1274         freezeUndo();
1275
1276         bv_->text->clearSelection();
1277         if (!lout.empty()) {
1278                 bv_->text->breakParagraph(bv_->buffer()->paragraphs());
1279
1280                 if (!bv_->text->cursorPar()->empty()) {
1281                         bv_->text->cursorLeft(bv_);
1282                         bv_->text->breakParagraph(bv_->buffer()->paragraphs());
1283                 }
1284
1285                 string lres = lout;
1286                 LyXTextClass const & tclass = buffer_->params().getLyXTextClass();
1287                 bool hasLayout = tclass.hasLayout(lres);
1288
1289                 bv_->text->setLayout(hasLayout ? lres : tclass.defaultLayoutName());
1290
1291                 bv_->text->setParagraph(
1292                                    VSpace(VSpace::NONE), VSpace(VSpace::NONE),
1293                                    Spacing(),
1294                                    LYX_ALIGN_LAYOUT,
1295                                    string(),
1296                                    0);
1297         }
1298
1299         bv_->cursor().innerText()->insertInset(inset);
1300         update();
1301
1302         unFreezeUndo();
1303         return true;
1304 }
1305
1306
1307 bool BufferView::Pimpl::ChangeInsets(InsetOld::Code code,
1308                                      string const & from, string const & to)
1309 {
1310         bool need_update = false;
1311         LyXCursor cursor = bv_->text->cursor;
1312         LyXCursor tmpcursor = cursor;
1313         cursor.par(tmpcursor.par());
1314         cursor.pos(tmpcursor.pos());
1315
1316         ParIterator end = bv_->buffer()->par_iterator_end();
1317         for (ParIterator it = bv_->buffer()->par_iterator_begin();
1318              it != end; ++it) {
1319                 bool changed_inset = false;
1320                 for (InsetList::iterator it2 = it->insetlist.begin();
1321                      it2 != it->insetlist.end(); ++it2) {
1322                         if (it2->inset->lyxCode() == code) {
1323                                 InsetCommand * inset = static_cast<InsetCommand *>(it2->inset);
1324                                 if (inset->getContents() == from) {
1325                                         inset->setContents(to);
1326                                         changed_inset = true;
1327                                 }
1328                         }
1329                 }
1330                 if (changed_inset) {
1331                         need_update = true;
1332
1333                         // FIXME
1334
1335                         // The test it.size()==1 was needed to prevent crashes.
1336                         // How to set the cursor correctly when it.size()>1 ??
1337                         if (it.size() == 1) {
1338                                 bv_->text->setCursorIntern(bv_->text->parOffset(it.pit()), 0);
1339                                 bv_->text->redoParagraph(bv_->text->cursorPar());
1340                         }
1341                 }
1342         }
1343         bv_->text->setCursorIntern(cursor.par(), cursor.pos());
1344         return need_update;
1345 }
1346
1347
1348 void BufferView::Pimpl::updateParagraphDialog()
1349 {
1350         if (!bv_->owner()->getDialogs().visible("paragraph"))
1351                 return;
1352         Paragraph const & par = *bv_->getLyXText()->cursorPar();
1353         string data;
1354         params2string(par, data);
1355
1356         // Will the paragraph accept changes from the dialog?
1357         InsetOld * const inset = par.inInset();
1358         bool const accept =
1359                 !(inset && inset->forceDefaultParagraphs(inset));
1360
1361         data = "update " + tostr(accept) + '\n' + data;
1362         bv_->owner()->getDialogs().update("paragraph", data);
1363 }
1364
1365