src/BufferView_pimpl.C

   1 /**
   2  * \file BufferView_pimpl.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Asger Alstrup
   7  * \author Alfredo Braunstein
   8  * \author Lars Gullik Bjønnes
   9  * \author Jean-Marc Lasgouttes
  10  * \author Angus Leeming
  11  * \author John Levon
  12  * \author André Pönitz
  13  * \author Dekel Tsur
  14  * \author Jürgen Vigna
  15  *
  16  * Full author contact details are available in file CREDITS.
  17  */
  18
  19 #include <config.h>
  20
  21 #include "BufferView_pimpl.h"
  22 #include "buffer.h"
  23 #include "buffer_funcs.h"
  24 #include "bufferlist.h"
  25 #include "bufferparams.h"
  26 #include "coordcache.h"
  27 #include "cursor.h"
  28 #include "debug.h"
  29 #include "dispatchresult.h"
  30 #include "factory.h"
  31 #include "FloatList.h"
  32 #include "funcrequest.h"
  33 #include "FuncStatus.h"
  34 #include "gettext.h"
  35 #include "intl.h"
  36 #include "insetiterator.h"
  37 #include "LaTeXFeatures.h"
  38 #include "lyx_cb.h" // added for Dispatch functions
  39 #include "lyx_main.h"
  40 #include "lyxfind.h"
  41 #include "lyxfunc.h"
  42 #include "lyxtext.h"
  43 #include "lyxrc.h"
  44 #include "lastfiles.h"
  45 #include "metricsinfo.h"
  46 #include "paragraph.h"
  47 #include "paragraph_funcs.h"
  48 #include "ParagraphParameters.h"
  49 #include "pariterator.h"
  50 #include "rowpainter.h"
  51 #include "undo.h"
  52 #include "vspace.h"
  53
  54 #include "insets/insetref.h"
  55 #include "insets/insettext.h"
  56
  57 #include "frontends/Alert.h"
  58 #include "frontends/Dialogs.h"
  59 #include "frontends/FileDialog.h"
  60 #include "frontends/font_metrics.h"
  61 #include "frontends/LyXView.h"
  62 #include "frontends/LyXScreenFactory.h"
  63 #include "frontends/screen.h"
  64 #include "frontends/WorkArea.h"
  65 #include "frontends/WorkAreaFactory.h"
  66
  67 #include "graphics/Previews.h"
  68
  69 #include "support/convert.h"
  70 #include "support/filefilterlist.h"
  71 #include "support/filetools.h"
  72 #include "support/forkedcontr.h"
  73 #include "support/package.h"
  74 #include "support/types.h"
  75
  76 #include <boost/bind.hpp>
  77
  78 #include <functional>
  79
  80 using lyx::pos_type;
  81
  82 using lyx::support::AddPath;
  83 using lyx::support::bformat;
  84 using lyx::support::FileFilterList;
  85 using lyx::support::FileSearch;
  86 using lyx::support::ForkedcallsController;
  87 using lyx::support::IsDirWriteable;
  88 using lyx::support::MakeDisplayPath;
  89 using lyx::support::MakeAbsPath;
  90 using lyx::support::package;
  91 using lyx::support::strToUnsignedInt;
  92
  93 using std::endl;
  94 using std::istringstream;
  95 using std::make_pair;
  96 using std::min;
  97 using std::max;
  98 using std::string;
  99 using std::mem_fun_ref;
 100
 101
 102 extern BufferList bufferlist;
 103
 104
 105 namespace {
 106
 107 unsigned int const saved_positions_num = 20;
 108
 109 // All the below connection objects are needed because of a bug in some
 110 // versions of GCC (<=2.96 are on the suspects list.) By having and assigning
 111 // to these connections we avoid a segfault upon startup, and also at exit.
 112 // (Lgb)
 113
 114 boost::signals::connection dispatchcon;
 115 boost::signals::connection timecon;
 116 boost::signals::connection doccon;
 117 boost::signals::connection resizecon;
 118 boost::signals::connection kpresscon;
 119 boost::signals::connection selectioncon;
 120 boost::signals::connection lostcon;
 121
 122
 123 /// Get next inset of this class from current cursor position
 124 template <class T>
 125 T * getInsetByCode(LCursor & cur, InsetBase::Code code)
 126 {
 127         T * inset = 0;
 128         DocIterator it = cur;
 129         if (it.nextInset() &&
 130             it.nextInset()->lyxCode() == code) {
 131                 inset = static_cast<T*>(it.nextInset());
 132         }
 133         return inset;
 134 }
 135
 136
 137 } // anon namespace
 138
 139
 140 BufferView::Pimpl::Pimpl(BufferView & bv, LyXView * owner,
 141                          int width, int height)
 142         : bv_(&bv), owner_(owner), buffer_(0), cursor_timeout(400),
 143           using_xterm_cursor(false), cursor_(bv) ,
 144           anchor_ref_(0), offset_ref_(0)
 145 {
 146         xsel_cache_.set = false;
 147
 148         workarea_.reset(WorkAreaFactory::create(*owner_, width, height));
 149         screen_.reset(LyXScreenFactory::create(workarea()));
 150
 151         // Setup the signals
 152         doccon = workarea().scrollDocView
 153                 .connect(boost::bind(&BufferView::Pimpl::scrollDocView, this, _1));
 154         resizecon = workarea().workAreaResize
 155                 .connect(boost::bind(&BufferView::Pimpl::workAreaResize, this));
 156         dispatchcon = workarea().dispatch
 157                 .connect(boost::bind(&BufferView::Pimpl::workAreaDispatch, this, _1));
 158         kpresscon = workarea().workAreaKeyPress
 159                 .connect(boost::bind(&BufferView::Pimpl::workAreaKeyPress, this, _1, _2));
 160         selectioncon = workarea().selectionRequested
 161                 .connect(boost::bind(&BufferView::Pimpl::selectionRequested, this));
 162         lostcon = workarea().selectionLost
 163                 .connect(boost::bind(&BufferView::Pimpl::selectionLost, this));
 164
 165         timecon = cursor_timeout.timeout
 166                 .connect(boost::bind(&BufferView::Pimpl::cursorToggle, this));
 167         cursor_timeout.start();
 168         saved_positions.resize(saved_positions_num);
 169 }
 170
 171
 172 void BufferView::Pimpl::addError(ErrorItem const & ei)
 173 {
 174         errorlist_.push_back(ei);
 175 }
 176
 177
 178 void BufferView::Pimpl::showReadonly(bool)
 179 {
 180         owner_->updateWindowTitle();
 181         owner_->getDialogs().updateBufferDependent(false);
 182 }
 183
 184
 185 void BufferView::Pimpl::connectBuffer(Buffer & buf)
 186 {
 187         if (errorConnection_.connected())
 188                 disconnectBuffer();
 189
 190         errorConnection_ =
 191                 buf.error.connect(
 192                         boost::bind(&BufferView::Pimpl::addError, this, _1));
 193
 194         messageConnection_ =
 195                 buf.message.connect(
 196                         boost::bind(&LyXView::message, owner_, _1));
 197
 198         busyConnection_ =
 199                 buf.busy.connect(
 200                         boost::bind(&LyXView::busy, owner_, _1));
 201
 202         titleConnection_ =
 203                 buf.updateTitles.connect(
 204                         boost::bind(&LyXView::updateWindowTitle, owner_));
 205
 206         timerConnection_ =
 207                 buf.resetAutosaveTimers.connect(
 208                         boost::bind(&LyXView::resetAutosaveTimer, owner_));
 209
 210         readonlyConnection_ =
 211                 buf.readonly.connect(
 212                         boost::bind(&BufferView::Pimpl::showReadonly, this, _1));
 213
 214         closingConnection_ =
 215                 buf.closing.connect(
 216                         boost::bind(&BufferView::Pimpl::setBuffer, this, (Buffer *)0));
 217 }
 218
 219
 220 void BufferView::Pimpl::disconnectBuffer()
 221 {
 222         errorConnection_.disconnect();
 223         messageConnection_.disconnect();
 224         busyConnection_.disconnect();
 225         titleConnection_.disconnect();
 226         timerConnection_.disconnect();
 227         readonlyConnection_.disconnect();
 228         closingConnection_.disconnect();
 229 }
 230
 231
 232 void BufferView::Pimpl::newFile(string const & filename, string const & tname,
 233         bool isNamed)
 234 {
 235         setBuffer(::newFile(filename, tname, isNamed));
 236 }
 237
 238
 239 bool BufferView::Pimpl::loadLyXFile(string const & filename, bool tolastfiles)
 240 {
 241         // get absolute path of file and add ".lyx" to the filename if
 242         // necessary
 243         string s = FileSearch(string(), filename, "lyx");
 244
 245         bool const found = !s.empty();
 246
 247         if (!found)
 248                 s = filename;
 249
 250         // file already open?
 251         if (bufferlist.exists(s)) {
 252                 string const file = MakeDisplayPath(s, 20);
 253                 string text = bformat(_("The document %1$s is already "
 254                                         "loaded.\n\nDo you want to revert "
 255                                         "to the saved version?"), file);
 256                 int const ret = Alert::prompt(_("Revert to saved document?"),
 257                         text, 0, 1,  _("&Revert"), _("&Switch to document"));
 258
 259                 if (ret != 0) {
 260                         setBuffer(bufferlist.getBuffer(s));
 261                         return true;
 262                 }
 263                 // FIXME: should be LFUN_REVERT
 264                 if (!bufferlist.close(bufferlist.getBuffer(s), false))
 265                         return false;
 266                 // Fall through to new load. (Asger)
 267         }
 268
 269         Buffer * b;
 270
 271         if (found) {
 272                 b = bufferlist.newBuffer(s);
 273                 connectBuffer(*b);
 274                 if (!::loadLyXFile(b, s)) {
 275                         bufferlist.release(b);
 276                         return false;
 277                 }
 278         } else {
 279                 string text = bformat(_("The document %1$s does not yet "
 280                                         "exist.\n\nDo you want to create "
 281                                         "a new document?"), s);
 282                 int const ret = Alert::prompt(_("Create new document?"),
 283                          text, 0, 1, _("&Create"), _("Cancel"));
 284
 285                 if (ret == 0)
 286                         b = ::newFile(s, string(), true);
 287                 else
 288                         return false;
 289         }
 290
 291         setBuffer(b);
 292         bv_->showErrorList(_("Parse"));
 293
 294         if (tolastfiles)
 295                 LyX::ref().lastfiles().newFile(b->fileName());
 296
 297         return true;
 298 }
 299
 300
 301 WorkArea & BufferView::Pimpl::workarea() const
 302 {
 303         return *workarea_.get();
 304 }
 305
 306
 307 LyXScreen & BufferView::Pimpl::screen() const
 308 {
 309         return *screen_.get();
 310 }
 311
 312
 313 Painter & BufferView::Pimpl::painter() const
 314 {
 315         return workarea().getPainter();
 316 }
 317
 318
 319 void BufferView::Pimpl::setBuffer(Buffer * b)
 320 {
 321         lyxerr[Debug::INFO] << "Setting buffer in BufferView ("
 322                             << b << ')' << endl;
 323         if (buffer_)
 324                 disconnectBuffer();
 325
 326         // if we are closing current buffer, switch to the first in
 327         // buffer list.
 328         if (!b) {
 329                 lyxerr[Debug::INFO] << "  No Buffer!" << endl;
 330                 // we are closing the buffer, use the first buffer as current
 331                 buffer_ = bufferlist.first();
 332                 owner_->getDialogs().hideBufferDependent();
 333         } else {
 334                 // set current buffer
 335                 buffer_ = b;
 336         }
 337
 338         // reset old cursor
 339         cursor_ = LCursor(*bv_);
 340         anchor_ref_ = 0;
 341         offset_ref_ = 0;
 342
 343
 344         // if we're quitting lyx, don't bother updating stuff
 345         if (quitting)
 346                 return;
 347
 348         if (buffer_) {
 349                 lyxerr[Debug::INFO] << "Buffer addr: " << buffer_ << endl;
 350                 connectBuffer(*buffer_);
 351
 352                 cursor_.push(buffer_->inset());
 353                 cursor_.resetAnchor();
 354                 buffer_->text().init(bv_);
 355                 buffer_->text().setCurrentFont(cursor_);
 356
 357                 // Buffer-dependent dialogs should be updated or
 358                 // hidden. This should go here because some dialogs (eg ToC)
 359                 // require bv_->text.
 360                 owner_->getDialogs().updateBufferDependent(true);
 361         }
 362
 363         update();
 364         updateScrollbar();
 365         owner_->updateMenubar();
 366         owner_->updateToolbars();
 367         owner_->updateLayoutChoice();
 368         owner_->updateWindowTitle();
 369
 370         // This is done after the layout combox has been populated
 371         if (buffer_)
 372                 owner_->setLayout(cursor_.paragraph().layout()->name());
 373
 374         if (buffer_ && lyx::graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 375                 lyx::graphics::Previews::get().generateBufferPreviews(*buffer_);
 376 }
 377
 378
 379 void BufferView::Pimpl::resizeCurrentBuffer()
 380 {
 381         lyxerr[Debug::DEBUG] << "resizeCurrentBuffer" << endl;
 382         owner_->busy(true);
 383         owner_->message(_("Formatting document..."));
 384
 385         LyXText * text = bv_->text();
 386         if (!text)
 387                 return;
 388
 389         text->init(bv_);
 390         update();
 391
 392         switchKeyMap();
 393         owner_->busy(false);
 394
 395         // reset the "Formatting..." message
 396         owner_->clearMessage();
 397
 398         updateScrollbar();
 399 }
 400
 401
 402 void BufferView::Pimpl::updateScrollbar()
 403 {
 404         if (!bv_->text()) {
 405                 lyxerr[Debug::DEBUG] << "no text in updateScrollbar" << endl;
 406                 workarea().setScrollbarParams(0, 0, 0);
 407                 return;
 408         }
 409
 410         LyXText & t = *bv_->text();
 411         if (anchor_ref_ >  int(t.paragraphs().size()) - 1) {
 412                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 413                 offset_ref_ = 0;
 414         }
 415
 416         lyxerr[Debug::GUI]
 417                 << "Updating scrollbar: height: " << t.paragraphs().size()
 418                 << " curr par: " << bv_->cursor().bottom().pit()
 419                 << " default height " << defaultRowHeight() << endl;
 420
 421         //it would be better to fix the scrollbar to understand
 422         //values in [0..1] and divide everything by wh
 423         int const wh = workarea().workHeight() / 4;
 424         int const h = t.getPar(anchor_ref_).height();
 425         workarea().setScrollbarParams(t.paragraphs().size() * wh, anchor_ref_ * wh + int(offset_ref_ * wh / float(h)), int (wh * defaultRowHeight() / float(h)));
 426 //      workarea().setScrollbarParams(t.paragraphs().size(), anchor_ref_, 1);
 427 }
 428
 429
 430 void BufferView::Pimpl::scrollDocView(int value)
 431 {
 432         lyxerr[Debug::GUI] << "scrollDocView of " << value << endl;
 433
 434         if (!buffer_)
 435                 return;
 436
 437         screen().hideCursor();
 438
 439         int const wh = workarea().workHeight() / 4;
 440
 441         LyXText & t = *bv_->text();
 442
 443         float const bar = value / float(wh * t.paragraphs().size());
 444
 445         anchor_ref_ = int(bar * t.paragraphs().size());
 446         t.redoParagraph(anchor_ref_);
 447         int const h = t.getPar(anchor_ref_).height();
 448         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 449         lyxerr << "scrolling: " << value << std::endl;
 450         update();
 451
 452         if (!lyxrc.cursor_follows_scrollbar)
 453                 return;
 454
 455         int const height = 2 * defaultRowHeight();
 456         int const first = height;
 457         int const last = workarea().workHeight() - height;
 458         LCursor & cur = bv_->cursor();
 459
 460         bv_funcs::CurStatus st = bv_funcs::status(bv_, cur);
 461
 462         switch (st) {
 463         case bv_funcs::CUR_ABOVE:
 464                 t.setCursorFromCoordinates(cur, 0, first);
 465                 cur.clearSelection();
 466                 break;
 467         case bv_funcs::CUR_BELOW:
 468                 t.setCursorFromCoordinates(cur, 0, last);
 469                 cur.clearSelection();
 470                 break;
 471         case bv_funcs::CUR_INSIDE:
 472                 int const y = bv_funcs::getPos(cur).y_;
 473                 int const newy = min(last, max(y, first));
 474                 if (y != newy) {
 475                         cur.reset(bv_->buffer()->inset());
 476                         t.setCursorFromCoordinates(cur, 0, newy);
 477                 }
 478         }
 479         owner_->updateLayoutChoice();
 480 }
 481
 482
 483 void BufferView::Pimpl::scroll(int lines)
 484 {
 485 //      if (!buffer_)
 486 //              return;
 487 //
 488 //      LyXText const * t = bv_->text();
 489 //      int const line_height = defaultRowHeight();
 490 //
 491 //      // The new absolute coordinate
 492 //      int new_top_y = top_y() + lines * line_height;
 493 //
 494 //      // Restrict to a valid value
 495 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
 496 //      new_top_y = std::max(0, new_top_y);
 497 //
 498 //      scrollDocView(new_top_y);
 499 //
 500 //      // Update the scrollbar.
 501 //      workarea().setScrollbarParams(t->height(), top_y(), defaultRowHeight());
 502 }
 503
 504
 505 void BufferView::Pimpl::workAreaKeyPress(LyXKeySymPtr key,
 506                                          key_modifier::state state)
 507 {
 508         bv_->owner()->getLyXFunc().processKeySym(key, state);
 509
 510         /* This is perhaps a bit of a hack. When we move
 511          * around, or type, it's nice to be able to see
 512          * the cursor immediately after the keypress. So
 513          * we reset the toggle timeout and force the visibility
 514          * of the cursor. Note we cannot do this inside
 515          * dispatch() itself, because that's called recursively.
 516          */
 517         if (available()) {
 518                 cursor_timeout.restart();
 519                 screen().showCursor(*bv_);
 520         }
 521 }
 522
 523
 524 void BufferView::Pimpl::selectionRequested()
 525 {
 526         static string sel;
 527
 528         if (!available())
 529                 return;
 530
 531         LCursor & cur = bv_->cursor();
 532
 533         if (!cur.selection()) {
 534                 xsel_cache_.set = false;
 535                 return;
 536         }
 537
 538         if (!xsel_cache_.set ||
 539             cur.back() != xsel_cache_.cursor ||
 540             cur.anchor_.back() != xsel_cache_.anchor)
 541         {
 542                 xsel_cache_.cursor = cur.back();
 543                 xsel_cache_.anchor = cur.anchor_.back();
 544                 xsel_cache_.set = cur.selection();
 545                 sel = cur.selectionAsString(false);
 546                 if (!sel.empty())
 547                         workarea().putClipboard(sel);
 548         }
 549 }
 550
 551
 552 void BufferView::Pimpl::selectionLost()
 553 {
 554         if (available()) {
 555                 screen().hideCursor();
 556                 bv_->cursor().clearSelection();
 557                 xsel_cache_.set = false;
 558         }
 559 }
 560
 561
 562 void BufferView::Pimpl::workAreaResize()
 563 {
 564         static int work_area_width;
 565         static int work_area_height;
 566
 567         bool const widthChange = workarea().workWidth() != work_area_width;
 568         bool const heightChange = workarea().workHeight() != work_area_height;
 569
 570         // update from work area
 571         work_area_width = workarea().workWidth();
 572         work_area_height = workarea().workHeight();
 573
 574         if (buffer_ && widthChange) {
 575                 // The visible LyXView need a resize
 576                 resizeCurrentBuffer();
 577         }
 578
 579         if (widthChange || heightChange)
 580                 update();
 581
 582         // always make sure that the scrollbar is sane.
 583         updateScrollbar();
 584         owner_->updateLayoutChoice();
 585 }
 586
 587
 588 bool BufferView::Pimpl::fitCursor()
 589 {
 590         if (bv_funcs::status(bv_, bv_->cursor()) == bv_funcs::CUR_INSIDE) {
 591                 LyXFont const font = bv_->cursor().getFont();
 592                 int const asc = font_metrics::maxAscent(font);
 593                 int const des = font_metrics::maxDescent(font);
 594                 Point p = bv_funcs::getPos(bv_->cursor());
 595                 if (p.y_ - asc >= 0 && p.y_ + des < bv_->workHeight())
 596                         return false;
 597         }
 598         bv_->center();
 599         return true;
 600 }
 601
 602
 603 void BufferView::Pimpl::update(bool fitcursor, bool forceupdate)
 604 {
 605         lyxerr << "BufferView::Pimpl::update(fc=" << fitcursor << ", fu="
 606                << forceupdate << ")  buffer: " << buffer_ << endl;
 607
 608         // check needed to survive LyX startup
 609         if (buffer_) {
 610                 // update macro store
 611                 buffer_->buildMacros();
 612                 // first drawing step
 613
 614                 CoordCache backup;
 615                 std::swap(theCoords, backup);
 616                 //
 617                 ViewMetricsInfo vi = metrics();
 618
 619                 if (fitcursor && fitCursor()) {
 620                         forceupdate = true;
 621                         vi = metrics();
 622                 }
 623                 if (forceupdate) {
 624                         // second drawing step
 625                         screen().redraw(*bv_, vi);
 626                 } else
 627                         std::swap(theCoords, backup);
 628         } else
 629                 screen().greyOut();
 630
 631         // and the scrollbar
 632         updateScrollbar();
 633         bv_->owner()->view_state_changed();
 634 }
 635
 636
 637 // Callback for cursor timer
 638 void BufferView::Pimpl::cursorToggle()
 639 {
 640         if (buffer_) {
 641                 screen().toggleCursor(*bv_);
 642
 643                 // Use this opportunity to deal with any child processes that
 644                 // have finished but are waiting to communicate this fact
 645                 // to the rest of LyX.
 646                 ForkedcallsController & fcc = ForkedcallsController::get();
 647                 if (fcc.processesCompleted())
 648                         fcc.handleCompletedProcesses();
 649         }
 650
 651         cursor_timeout.restart();
 652 }
 653
 654
 655 bool BufferView::Pimpl::available() const
 656 {
 657         return buffer_ && bv_->text();
 658 }
 659
 660
 661 Change const BufferView::Pimpl::getCurrentChange()
 662 {
 663         if (!bv_->buffer()->params().tracking_changes)
 664                 return Change(Change::UNCHANGED);
 665
 666         LyXText * text = bv_->getLyXText();
 667         LCursor & cur = bv_->cursor();
 668
 669         if (!cur.selection())
 670                 return Change(Change::UNCHANGED);
 671
 672         return text->getPar(cur.selBegin().pit()).
 673                         lookupChangeFull(cur.selBegin().pos());
 674 }
 675
 676
 677 void BufferView::Pimpl::savePosition(unsigned int i)
 678 {
 679         if (i >= saved_positions_num)
 680                 return;
 681         BOOST_ASSERT(bv_->cursor().inTexted());
 682         saved_positions[i] = Position(buffer_->fileName(),
 683                                       bv_->cursor().paragraph().id(),
 684                                       bv_->cursor().pos());
 685         if (i > 0)
 686                 owner_->message(bformat(_("Saved bookmark %1$d"), i));
 687 }
 688
 689
 690 void BufferView::Pimpl::restorePosition(unsigned int i)
 691 {
 692         if (i >= saved_positions_num)
 693                 return;
 694
 695         string const fname = saved_positions[i].filename;
 696
 697         bv_->cursor().clearSelection();
 698
 699         if (fname != buffer_->fileName()) {
 700                 Buffer * b = 0;
 701                 if (bufferlist.exists(fname))
 702                         b = bufferlist.getBuffer(fname);
 703                 else {
 704                         b = bufferlist.newBuffer(fname);
 705                         ::loadLyXFile(b, fname); // don't ask, just load it
 706                 }
 707                 if (b)
 708                         setBuffer(b);
 709         }
 710
 711         ParIterator par = buffer_->getParFromID(saved_positions[i].par_id);
 712         if (par == buffer_->par_iterator_end())
 713                 return;
 714
 715         bv_->text()->setCursor(bv_->cursor(), par.pit(),
 716                 min(par->size(), saved_positions[i].par_pos));
 717
 718         if (i > 0)
 719                 owner_->message(bformat(_("Moved to bookmark %1$d"), i));
 720 }
 721
 722
 723 bool BufferView::Pimpl::isSavedPosition(unsigned int i)
 724 {
 725         return i < saved_positions_num && !saved_positions[i].filename.empty();
 726 }
 727
 728
 729 void BufferView::Pimpl::switchKeyMap()
 730 {
 731         if (!lyxrc.rtl_support)
 732                 return;
 733
 734         Intl & intl = owner_->getIntl();
 735         if (bv_->getLyXText()->real_current_font.isRightToLeft()) {
 736                 if (intl.keymap == Intl::PRIMARY)
 737                         intl.KeyMapSec();
 738         } else {
 739                 if (intl.keymap == Intl::SECONDARY)
 740                         intl.KeyMapPrim();
 741         }
 742 }
 743
 744
 745 void BufferView::Pimpl::center()
 746 {
 747         CursorSlice const & bot = bv_->cursor().bottom();
 748         lyx::pit_type const pit = bot.pit();
 749         bot.text()->redoParagraph(pit);
 750         Paragraph const & par = bot.text()->paragraphs()[pit];
 751         anchor_ref_ = pit;
 752         offset_ref_ = bv_funcs::coordOffset(bv_->cursor()).y_ + par.ascent()
 753                 - workarea().workHeight() / 2;
 754 }
 755
 756
 757 void BufferView::Pimpl::stuffClipboard(string const & content) const
 758 {
 759         workarea().putClipboard(content);
 760 }
 761
 762
 763 void BufferView::Pimpl::MenuInsertLyXFile(string const & filenm)
 764 {
 765         string filename = filenm;
 766
 767         if (filename.empty()) {
 768                 // Launch a file browser
 769                 string initpath = lyxrc.document_path;
 770
 771                 if (available()) {
 772                         string const trypath = owner_->buffer()->filePath();
 773                         // If directory is writeable, use this as default.
 774                         if (IsDirWriteable(trypath))
 775                                 initpath = trypath;
 776                 }
 777
 778                 FileDialog fileDlg(_("Select LyX document to insert"),
 779                         LFUN_FILE_INSERT,
 780                         make_pair(string(_("Documents|#o#O")),
 781                                   string(lyxrc.document_path)),
 782                         make_pair(string(_("Examples|#E#e")),
 783                                   string(AddPath(package().system_support(), "examples"))));
 784
 785                 FileDialog::Result result =
 786                         fileDlg.open(initpath,
 787                                      FileFilterList(_("LyX Documents (*.lyx)")),
 788                                      string());
 789
 790                 if (result.first == FileDialog::Later)
 791                         return;
 792
 793                 filename = result.second;
 794
 795                 // check selected filename
 796                 if (filename.empty()) {
 797                         owner_->message(_("Canceled."));
 798                         return;
 799                 }
 800         }
 801
 802         // get absolute path of file and add ".lyx" to the filename if
 803         // necessary
 804         filename = FileSearch(string(), filename, "lyx");
 805
 806         string const disp_fn = MakeDisplayPath(filename);
 807         owner_->message(bformat(_("Inserting document %1$s..."), disp_fn));
 808
 809         bv_->cursor().clearSelection();
 810         bv_->text()->breakParagraph(bv_->cursor());
 811
 812         BOOST_ASSERT(bv_->cursor().inTexted());
 813
 814         string const fname = MakeAbsPath(filename);
 815         bool const res = bv_->buffer()->readFile(fname, bv_->cursor().pit());
 816         bv_->resize();
 817
 818         string s = res ? _("Document %1$s inserted.")
 819                        : _("Could not insert document %1$s");
 820         owner_->message(bformat(s, disp_fn));
 821 }
 822
 823
 824 void BufferView::Pimpl::trackChanges()
 825 {
 826         Buffer * buf = bv_->buffer();
 827         bool const tracking = buf->params().tracking_changes;
 828
 829         if (!tracking) {
 830                 for_each(buf->par_iterator_begin(),
 831                          buf->par_iterator_end(),
 832                          bind(&Paragraph::trackChanges, _1, Change::UNCHANGED));
 833                 buf->params().tracking_changes = true;
 834
 835                 // we cannot allow undos beyond the freeze point
 836                 buf->undostack().clear();
 837         } else {
 838                 update();
 839                 bv_->text()->setCursor(bv_->cursor(), 0, 0);
 840 #ifdef WITH_WARNINGS
 841 #warning changes FIXME
 842 #endif
 843                 bool found = lyx::find::findNextChange(bv_);
 844                 if (found) {
 845                         owner_->getDialogs().show("changes");
 846                         return;
 847                 }
 848
 849                 for_each(buf->par_iterator_begin(),
 850                          buf->par_iterator_end(),
 851                          mem_fun_ref(&Paragraph::untrackChanges));
 852
 853                 buf->params().tracking_changes = false;
 854         }
 855
 856         buf->redostack().clear();
 857 }
 858
 859
 860 bool BufferView::Pimpl::workAreaDispatch(FuncRequest const & cmd0)
 861 {
 862         lyxerr << "BufferView::Pimpl::workAreaDispatch: request: "
 863           << cmd0 << std::endl;
 864         // this is only called for mouse related events including
 865         // LFUN_FILE_OPEN generated by drag-and-drop.
 866         FuncRequest cmd = cmd0;
 867
 868         // handle drag&drop
 869         if (cmd.action == LFUN_FILE_OPEN) {
 870                 owner_->dispatch(cmd);
 871                 return true;
 872         }
 873
 874         if (!bv_->buffer())
 875                 return false;
 876
 877         LCursor cur(*bv_);
 878         cur.push(bv_->buffer()->inset());
 879         cur.selection() = bv_->cursor().selection();
 880
 881         // Doesn't go through lyxfunc, so we need to update
 882         // the layout choice etc. ourselves
 883
 884         // e.g. Qt mouse press when no buffer
 885         if (!available())
 886                 return false;
 887
 888         screen().hideCursor();
 889
 890         // Either the inset under the cursor or the
 891         // surrounding LyXText will handle this event.
 892
 893         // Build temporary cursor.
 894         cmd.y = min(max(cmd.y,-1), bv_->workHeight());
 895         InsetBase * inset = bv_->text()->editXY(cur, cmd.x, cmd.y);
 896         lyxerr << " * hit inset at tip: " << inset << endl;
 897         lyxerr << " * created temp cursor:" << cur << endl;
 898
 899         // Put anchor at the same position.
 900         cur.resetAnchor();
 901
 902         // Try to dispatch to an non-editable inset near this position
 903         // via the temp cursor. If the inset wishes to change the real
 904         // cursor it has to do so explicitly by using
 905         //  cur.bv().cursor() = cur;  (or similar)
 906         if (inset)
 907                 inset->dispatch(cur, cmd);
 908
 909         // Now dispatch to the temporary cursor. If the real cursor should
 910         // be modified, the inset's dispatch has to do so explicitly.
 911         if (!cur.result().dispatched())
 912                 cur.dispatch(cmd);
 913
 914         if (cur.result().dispatched()) {
 915                 // Redraw if requested or necessary.
 916                 update(cur.result().update(), cur.result().update());
 917         }
 918
 919         // see workAreaKeyPress
 920         cursor_timeout.restart();
 921         screen().showCursor(*bv_);
 922
 923         // skip these when selecting
 924         if (cmd.action != LFUN_MOUSE_MOTION) {
 925                 owner_->updateLayoutChoice();
 926                 owner_->updateToolbars();
 927         }
 928
 929         // slight hack: this is only called currently when we
 930         // clicked somewhere, so we force through the display
 931         // of the new status here.
 932         owner_->clearMessage();
 933         return true;
 934 }
 935
 936
 937 FuncStatus BufferView::Pimpl::getStatus(FuncRequest const & cmd)
 938 {
 939         Buffer * buf = bv_->buffer();
 940
 941         FuncStatus flag;
 942
 943         switch (cmd.action) {
 944
 945         case LFUN_UNDO:
 946                 flag.enabled(!buf->undostack().empty());
 947                 break;
 948         case LFUN_REDO:
 949                 flag.enabled(!buf->redostack().empty());
 950                 break;
 951         case LFUN_FILE_INSERT:
 952         case LFUN_FILE_INSERT_ASCII_PARA:
 953         case LFUN_FILE_INSERT_ASCII:
 954         case LFUN_FONT_STATE:
 955         case LFUN_INSERT_LABEL:
 956         case LFUN_BOOKMARK_SAVE:
 957         case LFUN_REF_GOTO:
 958         case LFUN_WORD_FIND:
 959         case LFUN_WORD_REPLACE:
 960         case LFUN_MARK_OFF:
 961         case LFUN_MARK_ON:
 962         case LFUN_SETMARK:
 963         case LFUN_CENTER:
 964         case LFUN_WORDS_COUNT:
 965                 flag.enabled(true);
 966                 break;
 967
 968         case LFUN_BOOKMARK_GOTO:
 969                 flag.enabled(bv_->isSavedPosition(strToUnsignedInt(cmd.argument)));
 970                 break;
 971         case LFUN_TRACK_CHANGES:
 972                 flag.enabled(true);
 973                 flag.setOnOff(buf->params().tracking_changes);
 974                 break;
 975
 976         case LFUN_OUTPUT_CHANGES: {
 977                 LaTeXFeatures features(*buf, buf->params(), false);
 978                 flag.enabled(buf && buf->params().tracking_changes
 979                         && features.isAvailable("dvipost"));
 980                 flag.setOnOff(buf->params().output_changes);
 981                 break;
 982         }
 983
 984         case LFUN_MERGE_CHANGES:
 985         case LFUN_ACCEPT_CHANGE: // what about these two
 986         case LFUN_REJECT_CHANGE: // what about these two
 987         case LFUN_ACCEPT_ALL_CHANGES:
 988         case LFUN_REJECT_ALL_CHANGES:
 989                 flag.enabled(buf && buf->params().tracking_changes);
 990                 break;
 991         default:
 992                 flag.enabled(false);
 993         }
 994
 995         return flag;
 996 }
 997
 998
 999
1000 bool BufferView::Pimpl::dispatch(FuncRequest const & cmd)
1001 {
1002         //lyxerr << "BufferView::Pimpl::dispatch  cmd: " << cmd << std::endl;
1003         // Make sure that the cached BufferView is correct.
1004         lyxerr[Debug::ACTION] << "BufferView::Pimpl::Dispatch:"
1005                 << " action[" << cmd.action << ']'
1006                 << " arg[" << cmd.argument << ']'
1007                 << " x[" << cmd.x << ']'
1008                 << " y[" << cmd.y << ']'
1009                 << " button[" << cmd.button() << ']'
1010                 << endl;
1011
1012         LCursor & cur = bv_->cursor();
1013
1014         switch (cmd.action) {
1015
1016         case LFUN_UNDO:
1017                 if (available()) {
1018                         cur.message(_("Undo"));
1019                         cur.clearSelection();
1020                         if (!textUndo(*bv_))
1021                                 cur.message(_("No further undo information"));
1022                         update();
1023                         switchKeyMap();
1024                 }
1025                 break;
1026
1027         case LFUN_REDO:
1028                 if (available()) {
1029                         cur.message(_("Redo"));
1030                         cur.clearSelection();
1031                         if (!textRedo(*bv_))
1032                                 cur.message(_("No further redo information"));
1033                         update();
1034                         switchKeyMap();
1035                 }
1036                 break;
1037
1038         case LFUN_FILE_INSERT:
1039                 MenuInsertLyXFile(cmd.argument);
1040                 break;
1041
1042         case LFUN_FILE_INSERT_ASCII_PARA:
1043                 InsertAsciiFile(bv_, cmd.argument, true);
1044                 break;
1045
1046         case LFUN_FILE_INSERT_ASCII:
1047                 InsertAsciiFile(bv_, cmd.argument, false);
1048                 break;
1049
1050         case LFUN_FONT_STATE:
1051                 cur.message(cur.currentState());
1052                 break;
1053
1054         case LFUN_BOOKMARK_SAVE:
1055                 savePosition(strToUnsignedInt(cmd.argument));
1056                 break;
1057
1058         case LFUN_BOOKMARK_GOTO:
1059                 restorePosition(strToUnsignedInt(cmd.argument));
1060                 break;
1061
1062         case LFUN_REF_GOTO: {
1063                 string label = cmd.argument;
1064                 if (label.empty()) {
1065                         InsetRef * inset =
1066                                 getInsetByCode<InsetRef>(bv_->cursor(),
1067                                                          InsetBase::REF_CODE);
1068                         if (inset) {
1069                                 label = inset->getContents();
1070                                 savePosition(0);
1071                         }
1072                 }
1073
1074                 if (!label.empty())
1075                         bv_->gotoLabel(label);
1076                 break;
1077         }
1078
1079         case LFUN_TRACK_CHANGES:
1080                 trackChanges();
1081                 break;
1082
1083         case LFUN_OUTPUT_CHANGES: {
1084                 Buffer * buf = bv_->buffer();
1085                 bool const state = buf->params().output_changes;
1086                 buf->params().output_changes = !state;
1087                 break;
1088         }
1089
1090         case LFUN_MERGE_CHANGES:
1091                 owner_->getDialogs().show("changes");
1092                 break;
1093
1094         case LFUN_ACCEPT_ALL_CHANGES: {
1095                 bv_->cursor().reset(bv_->buffer()->inset());
1096 #ifdef WITH_WARNINGS
1097 #warning FIXME changes
1098 #endif
1099                 while (lyx::find::findNextChange(bv_))
1100                         bv_->getLyXText()->acceptChange(bv_->cursor());
1101                 update();
1102                 break;
1103         }
1104
1105         case LFUN_REJECT_ALL_CHANGES: {
1106                 bv_->cursor().reset(bv_->buffer()->inset());
1107 #ifdef WITH_WARNINGS
1108 #warning FIXME changes
1109 #endif
1110                 while (lyx::find::findNextChange(bv_))
1111                         bv_->getLyXText()->rejectChange(bv_->cursor());
1112                 break;
1113         }
1114
1115         case LFUN_WORD_FIND:
1116                 lyx::find::find(bv_, cmd);
1117                 break;
1118
1119         case LFUN_WORD_REPLACE:
1120                 lyx::find::replace(bv_, cmd);
1121                 break;
1122
1123         case LFUN_MARK_OFF:
1124                 cur.clearSelection();
1125                 cur.resetAnchor();
1126                 cur.message(N_("Mark off"));
1127                 break;
1128
1129         case LFUN_MARK_ON:
1130                 cur.clearSelection();
1131                 cur.mark() = true;
1132                 cur.resetAnchor();
1133                 cur.message(N_("Mark on"));
1134                 break;
1135
1136         case LFUN_SETMARK:
1137                 cur.clearSelection();
1138                 if (cur.mark()) {
1139                         cur.mark() = false;
1140                         cur.message(N_("Mark removed"));
1141                 } else {
1142                         cur.mark() = true;
1143                         cur.message(N_("Mark set"));
1144                 }
1145                 cur.resetAnchor();
1146                 break;
1147
1148         case LFUN_CENTER:
1149                 bv_->center();
1150                 break;
1151
1152         case LFUN_WORDS_COUNT: {
1153                 DocIterator from, to;
1154                 if (cur.selection()) {
1155                         from = cur.selectionBegin();
1156                         to = cur.selectionEnd();
1157                 } else {
1158                         from = doc_iterator_begin(bv_->buffer()->inset());
1159                         to = doc_iterator_end(bv_->buffer()->inset());
1160                 }
1161                 int const count = countWords(from, to);
1162                 string message;
1163                 if (count != 1) {
1164                         if (cur.selection())
1165                                 message = bformat(_("%1$d words in selection."),
1166                                           count);
1167                                 else
1168                                         message = bformat(_("%1$d words in document."),
1169                                                           count);
1170                 }
1171                 else {
1172                         if (cur.selection())
1173                                 message = _("One word in selection.");
1174                         else
1175                                 message = _("One word in document.");
1176                 }
1177
1178                 Alert::information(_("Count words"), message);
1179         }
1180                 break;
1181         default:
1182                 return false;
1183         }
1184
1185         return true;
1186 }
1187
1188
1189 ViewMetricsInfo BufferView::Pimpl::metrics()
1190 {
1191         // remove old position cache
1192         theCoords.clear();
1193         BufferView & bv = *bv_;
1194         LyXText * const text = bv.text();
1195         if (anchor_ref_ > int(text->paragraphs().size() - 1)) {
1196                 anchor_ref_ = int(text->paragraphs().size() - 1);
1197                 offset_ref_ = 0;
1198         }
1199
1200         lyx::pit_type const pit = anchor_ref_;
1201         int pit1 = pit;
1202         int pit2 = pit;
1203         size_t npit = text->paragraphs().size();
1204         lyxerr << "npit: " << npit << " pit1: " << pit1
1205                 << " pit2: " << pit2 << endl;
1206
1207         // rebreak anchor par
1208         text->redoParagraph(pit);
1209         int y0 = text->getPar(pit1).ascent() - offset_ref_;
1210
1211         // redo paragraphs above cursor if necessary
1212         int y1 = y0;
1213         while (y1 > 0 && pit1 > 0) {
1214                 y1 -= text->getPar(pit1).ascent();
1215                 --pit1;
1216                 text->redoParagraph(pit1);
1217                 y1 -= text->getPar(pit1).descent();
1218         }
1219
1220
1221         // take care of ascent of first line
1222         y1 -= text->getPar(pit1).ascent();
1223
1224         //normalize anchor for next time
1225         anchor_ref_ = pit1;
1226         offset_ref_ = -y1;
1227
1228         // grey at the beginning is ugly
1229         if (pit1 == 0 && y1 > 0) {
1230                 y0 -= y1;
1231                 y1 = 0;
1232                 anchor_ref_ = 0;
1233         }
1234
1235         // redo paragraphs below cursor if necessary
1236         int y2 = y0;
1237         while (y2 < bv.workHeight() && pit2 < int(npit) - 1) {
1238                 y2 += text->getPar(pit2).descent();
1239                 ++pit2;
1240                 text->redoParagraph(pit2);
1241                 y2 += text->getPar(pit2).ascent();
1242         }
1243
1244         // take care of descent of last line
1245         y2 += text->getPar(pit2).descent();
1246
1247         // the coordinates of all these paragraphs are correct, cache them
1248         int y = y1;
1249         for (lyx::pit_type pit = pit1; pit <= pit2; ++pit) {
1250                 y += text->getPar(pit).ascent();
1251                 theCoords.pars_[text][pit] = Point(0, y);
1252                 y += text->getPar(pit).descent();
1253         }
1254
1255         lyxerr << "bv:metrics:  y1: " << y1 << " y2: " << y2 << endl;
1256         return ViewMetricsInfo(pit1, pit2, y1, y2);
1257 }