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