src/BufferView.cpp

   1 /**
   2  * \file BufferView.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Alfredo Braunstein
   7  * \author Lars Gullik Bjønnes
   8  * \author John Levon
   9  * \author André Pönitz
  10  * \author Jürgen Vigna
  11  *
  12  * Full author contact details are available in file CREDITS.
  13  */
  14
  15 #include <config.h>
  16
  17 #include "BufferView.h"
  18
  19 #include "Buffer.h"
  20 #include "buffer_funcs.h"
  21 #include "BufferList.h"
  22 #include "BufferParams.h"
  23 #include "bufferview_funcs.h"
  24 #include "callback.h" // added for Dispatch functions
  25 #include "CoordCache.h"
  26 #include "CutAndPaste.h"
  27 #include "debug.h"
  28 #include "DispatchResult.h"
  29 #include "ErrorList.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 "Language.h"
  38 #include "LaTeXFeatures.h"
  39 #include "LyX.h"
  40 #include "lyxfind.h"
  41 #include "LyXFunc.h"
  42 #include "Layout.h"
  43 #include "LyXRC.h"
  44 #include "MetricsInfo.h"
  45 #include "Paragraph.h"
  46 #include "paragraph_funcs.h"
  47 #include "ParagraphParameters.h"
  48 #include "ParIterator.h"
  49 #include "Session.h"
  50 #include "TexRow.h"
  51 #include "Text.h"
  52 #include "TextClass.h"
  53 #include "toc.h"
  54 #include "Undo.h"
  55 #include "VSpace.h"
  56 #include "WordLangTuple.h"
  57
  58 #include "insets/InsetBibtex.h"
  59 #include "insets/InsetCommand.h" // ChangeRefs
  60 #include "insets/InsetRef.h"
  61 #include "insets/InsetText.h"
  62
  63 #include "frontends/alert.h"
  64 #include "frontends/FileDialog.h"
  65 #include "frontends/FontMetrics.h"
  66 #include "frontends/Painter.h"
  67 #include "frontends/Selection.h"
  68
  69 #include "graphics/Previews.h"
  70
  71 #include "support/convert.h"
  72 #include "support/FileFilterList.h"
  73 #include "support/filetools.h"
  74 #include "support/Package.h"
  75 #include "support/types.h"
  76
  77 #include <boost/bind.hpp>
  78 #include <boost/current_function.hpp>
  79
  80 #include <functional>
  81 #include <vector>
  82
  83 using std::distance;
  84 using std::endl;
  85 using std::istringstream;
  86 using std::make_pair;
  87 using std::min;
  88 using std::max;
  89 using std::mem_fun_ref;
  90 using std::string;
  91 using std::vector;
  92
  93
  94 namespace lyx {
  95
  96 using support::addPath;
  97 using support::bformat;
  98 using support::FileFilterList;
  99 using support::FileName;
 100 using support::fileSearch;
 101 using support::isDirWriteable;
 102 using support::isFileReadable;
 103 using support::makeDisplayPath;
 104 using support::package;
 105
 106 namespace Alert = frontend::Alert;
 107
 108 namespace {
 109
 110 /// Return an inset of this class if it exists at the current cursor position
 111 template <class T>
 112 T * getInsetByCode(Cursor & cur, Inset::Code code)
 113 {
 114         T * inset = 0;
 115         DocIterator it = cur;
 116         if (it.nextInset() &&
 117             it.nextInset()->lyxCode() == code) {
 118                 inset = static_cast<T*>(it.nextInset());
 119         }
 120         return inset;
 121 }
 122
 123 } // anon namespace
 124
 125
 126 BufferView::BufferView(Buffer & buf)
 127         : width_(0), height_(0), buffer_(buf), wh_(0),
 128           cursor_(*this),
 129           multiparsel_cache_(false), anchor_ref_(0), offset_ref_(0),
 130           need_centering_(false), intl_(new Intl), last_inset_(0)
 131 {
 132         xsel_cache_.set = false;
 133         intl_->initKeyMapper(lyxrc.use_kbmap);
 134
 135         cursor_.push(buffer_.inset());
 136         cursor_.resetAnchor();
 137         cursor_.setCurrentFont();
 138
 139         if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 140                 graphics::Previews::get().generateBufferPreviews(buffer_);
 141 }
 142
 143
 144 BufferView::~BufferView()
 145 {
 146         // current buffer is going to be switched-off, save cursor pos
 147         // Ideally, the whole cursor stack should be saved, but session
 148         // currently can only handle bottom (whole document) level pit and pos.
 149         // That is to say, if a cursor is in a nested inset, it will be
 150         // restore to the left of the top level inset.
 151         LyX::ref().session().lastFilePos().save(
 152                 support::FileName(buffer_.fileName()),
 153                 boost::tie(cursor_.bottom().pit(), cursor_.bottom().pos()) );
 154 }
 155
 156
 157 Buffer & BufferView::buffer()
 158 {
 159         return buffer_;
 160 }
 161
 162
 163 Buffer const & BufferView::buffer() const
 164 {
 165         return buffer_;
 166 }
 167
 168
 169 bool BufferView::fitCursor()
 170 {
 171         if (bv_funcs::status(this, cursor_) == bv_funcs::CUR_INSIDE) {
 172                 frontend::FontMetrics const & fm =
 173                         theFontMetrics(cursor_.getFont());
 174                 int const asc = fm.maxAscent();
 175                 int const des = fm.maxDescent();
 176                 Point const p = bv_funcs::getPos(*this, cursor_, cursor_.boundary());
 177                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 178                         return false;
 179         }
 180         center();
 181         return true;
 182 }
 183
 184
 185 bool BufferView::multiParSel()
 186 {
 187         if (!cursor_.selection())
 188                 return false;
 189         bool ret = multiparsel_cache_;
 190         multiparsel_cache_ = cursor_.selBegin().pit() != cursor_.selEnd().pit();
 191         // Either this, or previous selection spans paragraphs
 192         return ret || multiparsel_cache_;
 193 }
 194
 195
 196 bool BufferView::update(Update::flags flags)
 197 {
 198         // last_inset_ points to the last visited inset. This pointer may become
 199         // invalid because of keyboard editing. Since all such operations
 200         // causes screen update(), I reset last_inset_ to avoid such a problem.
 201         last_inset_ = 0;
 202         // This is close to a hot-path.
 203         LYXERR(Debug::DEBUG)
 204                 << BOOST_CURRENT_FUNCTION
 205                 << "[fitcursor = " << (flags & Update::FitCursor)
 206                 << ", forceupdate = " << (flags & Update::Force)
 207                 << ", singlepar = " << (flags & Update::SinglePar)
 208                 << "]  buffer: " << &buffer_ << endl;
 209
 210         // Update macro store
 211         if (!(cursor().inMathed() && cursor().inMacroMode()))
 212                 buffer_.buildMacros();
 213
 214         // Now do the first drawing step if needed. This consists on updating
 215         // the CoordCache in updateMetrics().
 216         // The second drawing step is done in WorkArea::redraw() if needed.
 217
 218         // Case when no explicit update is requested.
 219         if (!flags) {
 220                 // no need to redraw anything.
 221                 metrics_info_.update_strategy = NoScreenUpdate;
 222                 return false;
 223         }
 224
 225         if (flags == Update::Decoration) {
 226                 metrics_info_.update_strategy = DecorationUpdate;
 227                 return true;
 228         }
 229
 230         if (flags == Update::FitCursor
 231                 || flags == (Update::Decoration | Update::FitCursor)) {
 232                 bool const fit_cursor = fitCursor();
 233                 // tell the frontend to update the screen if needed.
 234                 if (fit_cursor) {
 235                         updateMetrics(false);
 236                         return true;
 237                 }
 238                 if (flags & Update::Decoration) {
 239                         metrics_info_.update_strategy = DecorationUpdate;
 240                         return true;
 241                 }
 242                 // no screen update is needed.
 243                 metrics_info_.update_strategy = NoScreenUpdate;
 244                 return false;
 245         }
 246
 247         bool full_metrics = flags & Update::Force;
 248         if (flags & Update::MultiParSel)
 249                 full_metrics |= multiParSel();
 250
 251         bool const single_par = !full_metrics;
 252         updateMetrics(single_par);
 253
 254         if (flags & Update::FitCursor && fitCursor())
 255                 updateMetrics(false);
 256
 257         // tell the frontend to update the screen.
 258         return true;
 259 }
 260
 261
 262 void BufferView::updateScrollbar()
 263 {
 264         Text & t = buffer_.text();
 265         TextMetrics & tm = text_metrics_[&t];
 266
 267         int const parsize = int(t.paragraphs().size() - 1);
 268         if (anchor_ref_ >  parsize)  {
 269                 anchor_ref_ = parsize;
 270                 offset_ref_ = 0;
 271         }
 272
 273         LYXERR(Debug::GUI)
 274                 << BOOST_CURRENT_FUNCTION
 275                 << " Updating scrollbar: height: " << t.paragraphs().size()
 276                 << " curr par: " << cursor_.bottom().pit()
 277                 << " default height " << defaultRowHeight() << endl;
 278
 279         // It would be better to fix the scrollbar to understand
 280         // values in [0..1] and divide everything by wh
 281
 282         // estimated average paragraph height:
 283         if (wh_ == 0)
 284                 wh_ = height_ / 4;
 285
 286         int h = tm.parMetrics(anchor_ref_).height();
 287
 288         // Normalize anchor/offset (MV):
 289         while (offset_ref_ > h && anchor_ref_ < parsize) {
 290                 anchor_ref_++;
 291                 offset_ref_ -= h;
 292                 h = tm.parMetrics(anchor_ref_).height();
 293         }
 294         // Look at paragraph heights on-screen
 295         int sumh = 0;
 296         int nh = 0;
 297         for (pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 298                 if (sumh > height_)
 299                         break;
 300                 int const h2 = tm.parMetrics(pit).height();
 301                 sumh += h2;
 302                 nh++;
 303         }
 304
 305         BOOST_ASSERT(nh);
 306         int const hav = sumh / nh;
 307         // More realistic average paragraph height
 308         if (hav > wh_)
 309                 wh_ = hav;
 310
 311         BOOST_ASSERT(h);
 312         scrollbarParameters_.height = (parsize + 1) * wh_;
 313         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 314         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 315 }
 316
 317
 318 ScrollbarParameters const & BufferView::scrollbarParameters() const
 319 {
 320         return scrollbarParameters_;
 321 }
 322
 323
 324 void BufferView::scrollDocView(int value)
 325 {
 326         LYXERR(Debug::GUI) << BOOST_CURRENT_FUNCTION
 327                            << "[ value = " << value << "]" << endl;
 328
 329         Text & t = buffer_.text();
 330         TextMetrics & tm = text_metrics_[&t];
 331
 332         float const bar = value / float(wh_ * t.paragraphs().size());
 333
 334         anchor_ref_ = int(bar * t.paragraphs().size());
 335         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 336                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 337
 338         tm.redoParagraph(anchor_ref_);
 339         int const h = tm.parMetrics(anchor_ref_).height();
 340         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 341         updateMetrics(false);
 342 }
 343
 344
 345 void BufferView::setCursorFromScrollbar()
 346 {
 347         TextMetrics & tm = text_metrics_[&buffer_.text()];
 348
 349         int const height = 2 * defaultRowHeight();
 350         int const first = height;
 351         int const last = height_ - height;
 352         Cursor & cur = cursor_;
 353
 354         bv_funcs::CurStatus st = bv_funcs::status(this, cur);
 355
 356         switch (st) {
 357         case bv_funcs::CUR_ABOVE:
 358                 // We reset the cursor because bv_funcs::status() does not
 359                 // work when the cursor is within mathed.
 360                 cur.reset(buffer_.inset());
 361                 tm.setCursorFromCoordinates(cur, 0, first);
 362                 cur.clearSelection();
 363                 break;
 364         case bv_funcs::CUR_BELOW:
 365                 // We reset the cursor because bv_funcs::status() does not
 366                 // work when the cursor is within mathed.
 367                 cur.reset(buffer_.inset());
 368                 tm.setCursorFromCoordinates(cur, 0, last);
 369                 cur.clearSelection();
 370                 break;
 371         case bv_funcs::CUR_INSIDE:
 372                 int const y = bv_funcs::getPos(*this, cur, cur.boundary()).y_;
 373                 int const newy = min(last, max(y, first));
 374                 if (y != newy) {
 375                         cur.reset(buffer_.inset());
 376                         tm.setCursorFromCoordinates(cur, 0, newy);
 377                 }
 378         }
 379 }
 380
 381
 382 Change const BufferView::getCurrentChange() const
 383 {
 384         if (!cursor_.selection())
 385                 return Change(Change::UNCHANGED);
 386
 387         DocIterator dit = cursor_.selectionBegin();
 388         return dit.paragraph().lookupChange(dit.pos());
 389 }
 390
 391
 392 void BufferView::saveBookmark(unsigned int idx)
 393 {
 394         // tenatively save bookmark, id and pos will be used to
 395         // acturately locate a bookmark in a 'live' lyx session.
 396         // pit and pos will be updated with bottom level pit/pos
 397         // when lyx exits.
 398         LyX::ref().session().bookmarks().save(
 399                 FileName(buffer_.fileName()),
 400                 cursor_.bottom().pit(),
 401                 cursor_.bottom().pos(),
 402                 cursor_.paragraph().id(),
 403                 cursor_.pos(),
 404                 idx
 405         );
 406         if (idx)
 407                 // emit message signal.
 408                 message(_("Save bookmark"));
 409 }
 410
 411
 412 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 413         int top_id, pos_type top_pos)
 414 {
 415         bool success = false;
 416         DocIterator doc_it;
 417
 418         cursor_.clearSelection();
 419
 420         // if a valid par_id is given, try it first
 421         // This is the case for a 'live' bookmark when unique paragraph ID
 422         // is used to track bookmarks.
 423         if (top_id > 0) {
 424                 ParIterator par = buffer_.getParFromID(top_id);
 425                 if (par != buffer_.par_iterator_end()) {
 426                         doc_it = makeDocIterator(par, min(par->size(), top_pos));
 427                         // Some slices of the iterator may not be
 428                         // reachable (e.g. closed collapsable inset)
 429                         // so the dociterator may need to be
 430                         // shortened. Otherwise, setCursor may crash
 431                         // lyx when the cursor can not be set to these
 432                         // insets.
 433                         size_t const n = doc_it.depth();
 434                         for (size_t i = 0; i < n; ++i)
 435                                 if (doc_it[i].inset().editable() != Inset::HIGHLY_EDITABLE) {
 436                                         doc_it.resize(i);
 437                                         break;
 438                                 }
 439                         success = true;
 440                 }
 441         }
 442
 443         // if top_id == 0, or searching through top_id failed
 444         // This is the case for a 'restored' bookmark when only bottom
 445         // (document level) pit was saved. Because of this, bookmark
 446         // restoration is inaccurate. If a bookmark was within an inset,
 447         // it will be restored to the left of the outmost inset that contains
 448         // the bookmark.
 449         if (static_cast<size_t>(bottom_pit) < buffer_.paragraphs().size()) {
 450                 doc_it = doc_iterator_begin(buffer_.inset());
 451                 doc_it.pit() = bottom_pit;
 452                 doc_it.pos() = min(bottom_pos, doc_it.paragraph().size());
 453                 success = true;
 454         }
 455
 456         if (success) {
 457                 // Note: only bottom (document) level pit is set.
 458                 setCursor(doc_it);
 459                 // set the current font.
 460                 cursor_.setCurrentFont();
 461                 // center the screen on this new position.
 462                 center();
 463         }
 464
 465         return success;
 466 }
 467
 468
 469 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 470 {
 471         if (lyxrc.rtl_support) {
 472                 if (cursor_.real_current_font.isRightToLeft()) {
 473                         if (intl_->keymap == Intl::PRIMARY)
 474                                 intl_->keyMapSec();
 475                 } else {
 476                         if (intl_->keymap == Intl::SECONDARY)
 477                                 intl_->keyMapPrim();
 478                 }
 479         }
 480
 481         intl_->getTransManager().translateAndInsert(c, t, cur);
 482 }
 483
 484
 485 int BufferView::workWidth() const
 486 {
 487         return width_;
 488 }
 489
 490
 491 void BufferView::updateOffsetRef()
 492 {
 493         // No need to update offset_ref_ in this case.
 494         if (!need_centering_)
 495                 return;
 496
 497         // We are not properly started yet, delay until resizing is
 498         // done.
 499         if (height_ == 0)
 500                 return;
 501
 502         CursorSlice & bot = cursor_.bottom();
 503         TextMetrics & tm = text_metrics_[bot.text()];
 504         ParagraphMetrics const & pm = tm.parMetrics(bot.pit());
 505         Point p = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary());
 506         offset_ref_ = p.y_ + pm.ascent() - height_ / 2;
 507
 508         need_centering_ = false;
 509 }
 510
 511
 512 void BufferView::center()
 513 {
 514         anchor_ref_ = cursor_.bottom().pit();
 515         need_centering_ = true;
 516 }
 517
 518
 519 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 520 {
 521         FuncStatus flag;
 522
 523         Cursor & cur = cursor_;
 524
 525         switch (cmd.action) {
 526
 527         case LFUN_UNDO:
 528                 flag.enabled(!buffer_.undostack().empty());
 529                 break;
 530         case LFUN_REDO:
 531                 flag.enabled(!buffer_.redostack().empty());
 532                 break;
 533         case LFUN_FILE_INSERT:
 534         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 535         case LFUN_FILE_INSERT_PLAINTEXT:
 536         case LFUN_BOOKMARK_SAVE:
 537                 // FIXME: Actually, these LFUNS should be moved to Text
 538                 flag.enabled(cur.inTexted());
 539                 break;
 540         case LFUN_FONT_STATE:
 541         case LFUN_LABEL_INSERT:
 542         case LFUN_PARAGRAPH_GOTO:
 543         // FIXME handle non-trivially
 544         case LFUN_OUTLINE_UP:
 545         case LFUN_OUTLINE_DOWN:
 546         case LFUN_OUTLINE_IN:
 547         case LFUN_OUTLINE_OUT:
 548         case LFUN_NOTE_NEXT:
 549         case LFUN_REFERENCE_NEXT:
 550         case LFUN_WORD_FIND:
 551         case LFUN_WORD_REPLACE:
 552         case LFUN_MARK_OFF:
 553         case LFUN_MARK_ON:
 554         case LFUN_MARK_TOGGLE:
 555         case LFUN_SCREEN_RECENTER:
 556         case LFUN_BIBTEX_DATABASE_ADD:
 557         case LFUN_BIBTEX_DATABASE_DEL:
 558         case LFUN_WORDS_COUNT:
 559         case LFUN_NEXT_INSET_TOGGLE:
 560                 flag.enabled(true);
 561                 break;
 562
 563         case LFUN_LABEL_GOTO: {
 564                 flag.enabled(!cmd.argument().empty()
 565                     || getInsetByCode<InsetRef>(cur, Inset::REF_CODE));
 566                 break;
 567         }
 568
 569         case LFUN_CHANGES_TRACK:
 570                 flag.enabled(true);
 571                 flag.setOnOff(buffer_.params().trackChanges);
 572                 break;
 573
 574         case LFUN_CHANGES_OUTPUT:
 575                 flag.enabled(true);
 576                 flag.setOnOff(buffer_.params().outputChanges);
 577                 break;
 578
 579         case LFUN_CHANGES_MERGE:
 580         case LFUN_CHANGE_NEXT:
 581         case LFUN_ALL_CHANGES_ACCEPT:
 582         case LFUN_ALL_CHANGES_REJECT:
 583                 // TODO: context-sensitive enabling of LFUNs
 584                 // In principle, these command should only be enabled if there
 585                 // is a change in the document. However, without proper
 586                 // optimizations, this will inevitably result in poor performance.
 587                 flag.enabled(true);
 588                 break;
 589
 590         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 591                 flag.setOnOff(buffer_.params().compressed);
 592                 break;
 593         }
 594
 595         default:
 596                 flag.enabled(false);
 597         }
 598
 599         return flag;
 600 }
 601
 602
 603 Update::flags BufferView::dispatch(FuncRequest const & cmd)
 604 {
 605         //lyxerr << BOOST_CURRENT_FUNCTION
 606         //       << [ cmd = " << cmd << "]" << endl;
 607
 608         // Make sure that the cached BufferView is correct.
 609         LYXERR(Debug::ACTION) << BOOST_CURRENT_FUNCTION
 610                 << " action[" << cmd.action << ']'
 611                 << " arg[" << to_utf8(cmd.argument()) << ']'
 612                 << " x[" << cmd.x << ']'
 613                 << " y[" << cmd.y << ']'
 614                 << " button[" << cmd.button() << ']'
 615                 << endl;
 616
 617         Cursor & cur = cursor_;
 618         // Default Update flags.
 619         Update::flags updateFlags = Update::Force | Update::FitCursor;
 620
 621         switch (cmd.action) {
 622
 623         case LFUN_UNDO:
 624                 cur.message(_("Undo"));
 625                 cur.clearSelection();
 626                 if (!textUndo(*this)) {
 627                         cur.message(_("No further undo information"));
 628                         updateFlags = Update::None;
 629                 }
 630                 break;
 631
 632         case LFUN_REDO:
 633                 cur.message(_("Redo"));
 634                 cur.clearSelection();
 635                 if (!textRedo(*this)) {
 636                         cur.message(_("No further redo information"));
 637                         updateFlags = Update::None;
 638                 }
 639                 break;
 640
 641         case LFUN_FILE_INSERT:
 642                 // FIXME UNICODE
 643                 menuInsertLyXFile(to_utf8(cmd.argument()));
 644                 break;
 645
 646         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 647                 // FIXME UNICODE
 648                 insertPlaintextFile(this, to_utf8(cmd.argument()), true);
 649                 break;
 650
 651         case LFUN_FILE_INSERT_PLAINTEXT:
 652                 // FIXME UNICODE
 653                 insertPlaintextFile(this, to_utf8(cmd.argument()), false);
 654                 break;
 655
 656         case LFUN_FONT_STATE:
 657                 cur.message(cur.currentState());
 658                 break;
 659
 660         case LFUN_BOOKMARK_SAVE:
 661                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 662                 break;
 663
 664         case LFUN_LABEL_GOTO: {
 665                 docstring label = cmd.argument();
 666                 if (label.empty()) {
 667                         InsetRef * inset =
 668                                 getInsetByCode<InsetRef>(cursor_,
 669                                                          Inset::REF_CODE);
 670                         if (inset) {
 671                                 label = inset->getParam("reference");
 672                                 // persistent=false: use temp_bookmark
 673                                 saveBookmark(0);
 674                         }
 675                 }
 676
 677                 if (!label.empty())
 678                         gotoLabel(label);
 679                 break;
 680         }
 681
 682         case LFUN_PARAGRAPH_GOTO: {
 683                 int const id = convert<int>(to_utf8(cmd.argument()));
 684                 int i = 0;
 685                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
 686                         b = theBufferList().next(b)) {
 687
 688                         ParIterator par = b->getParFromID(id);
 689                         if (par == b->par_iterator_end()) {
 690                                 LYXERR(Debug::INFO)
 691                                         << "No matching paragraph found! ["
 692                                         << id << "]." << endl;
 693                         } else {
 694                                 LYXERR(Debug::INFO)
 695                                         << "Paragraph " << par->id()
 696                                         << " found in buffer `"
 697                                         << b->fileName() << "'." << endl;
 698
 699                                 if (b == &buffer_) {
 700                                         // Set the cursor
 701                                         setCursor(makeDocIterator(par, 0));
 702                                 } else {
 703                                         // Switch to other buffer view and resend cmd
 704                                         theLyXFunc().dispatch(FuncRequest(
 705                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 706                                         theLyXFunc().dispatch(cmd);
 707                                         updateFlags = Update::None;
 708                                 }
 709                                 break;
 710                         }
 711                         ++i;
 712                 }
 713                 break;
 714         }
 715
 716         case LFUN_OUTLINE_UP:
 717                 toc::outline(toc::Up, cursor_);
 718                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 719                 updateLabels(buffer_);
 720                 break;
 721         case LFUN_OUTLINE_DOWN:
 722                 toc::outline(toc::Down, cursor_);
 723                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 724                 updateLabels(buffer_);
 725                 break;
 726         case LFUN_OUTLINE_IN:
 727                 toc::outline(toc::In, cursor_);
 728                 updateLabels(buffer_);
 729                 break;
 730         case LFUN_OUTLINE_OUT:
 731                 toc::outline(toc::Out, cursor_);
 732                 updateLabels(buffer_);
 733                 break;
 734
 735         case LFUN_NOTE_NEXT:
 736                 bv_funcs::gotoInset(this, Inset::NOTE_CODE, false);
 737                 break;
 738
 739         case LFUN_REFERENCE_NEXT: {
 740                 vector<Inset_code> tmp;
 741                 tmp.push_back(Inset::LABEL_CODE);
 742                 tmp.push_back(Inset::REF_CODE);
 743                 bv_funcs::gotoInset(this, tmp, true);
 744                 break;
 745         }
 746
 747         case LFUN_CHANGES_TRACK:
 748                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
 749                 break;
 750
 751         case LFUN_CHANGES_OUTPUT:
 752                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
 753                 if (buffer_.params().outputChanges) {
 754                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
 755                         bool xcolorsoul = LaTeXFeatures::isAvailable("soul") &&
 756                                           LaTeXFeatures::isAvailable("xcolor");
 757
 758                         if (!dvipost && !xcolorsoul) {
 759                                 Alert::warning(_("Changes not shown in LaTeX output"),
 760                                                _("Changes will not be highlighted in LaTeX output, "
 761                                                  "because neither dvipost nor xcolor/soul are installed.\n"
 762                                                  "Please install these packages or redefine "
 763                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
 764                         } else if (!xcolorsoul) {
 765                                 Alert::warning(_("Changes not shown in LaTeX output"),
 766                                                _("Changes will not be highlighted in LaTeX output "
 767                                                  "when using pdflatex, because xcolor and soul are not installed.\n"
 768                                                  "Please install both packages or redefine "
 769                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
 770                         }
 771                 }
 772                 break;
 773
 774         case LFUN_CHANGE_NEXT:
 775                 findNextChange(this);
 776                 break;
 777
 778         case LFUN_CHANGES_MERGE:
 779                 if (findNextChange(this))
 780                         showDialog("changes");
 781                 break;
 782
 783         case LFUN_ALL_CHANGES_ACCEPT:
 784                 // select complete document
 785                 cursor_.reset(buffer_.inset());
 786                 cursor_.selHandle(true);
 787                 buffer_.text().cursorBottom(cursor_);
 788                 // accept everything in a single step to support atomic undo
 789                 buffer_.text().acceptOrRejectChanges(cursor_, Text::ACCEPT);
 790                 break;
 791
 792         case LFUN_ALL_CHANGES_REJECT:
 793                 // select complete document
 794                 cursor_.reset(buffer_.inset());
 795                 cursor_.selHandle(true);
 796                 buffer_.text().cursorBottom(cursor_);
 797                 // reject everything in a single step to support atomic undo
 798                 // Note: reject does not work recursively; the user may have to repeat the operation
 799                 buffer_.text().acceptOrRejectChanges(cursor_, Text::REJECT);
 800                 break;
 801
 802         case LFUN_WORD_FIND:
 803                 find(this, cmd);
 804                 break;
 805
 806         case LFUN_WORD_REPLACE: {
 807                 bool has_deleted = false;
 808                 if (cur.selection()) {
 809                         DocIterator beg = cur.selectionBegin();
 810                         DocIterator end = cur.selectionEnd();
 811                         if (beg.pit() == end.pit()) {
 812                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
 813                                         if (cur.paragraph().isDeleted(p))
 814                                                 has_deleted = true;
 815                                 }
 816                         }
 817                 }
 818                 replace(this, cmd, has_deleted);
 819                 break;
 820         }
 821
 822         case LFUN_MARK_OFF:
 823                 cur.clearSelection();
 824                 cur.resetAnchor();
 825                 cur.message(from_utf8(N_("Mark off")));
 826                 break;
 827
 828         case LFUN_MARK_ON:
 829                 cur.clearSelection();
 830                 cur.mark() = true;
 831                 cur.resetAnchor();
 832                 cur.message(from_utf8(N_("Mark on")));
 833                 break;
 834
 835         case LFUN_MARK_TOGGLE:
 836                 cur.clearSelection();
 837                 if (cur.mark()) {
 838                         cur.mark() = false;
 839                         cur.message(from_utf8(N_("Mark removed")));
 840                 } else {
 841                         cur.mark() = true;
 842                         cur.message(from_utf8(N_("Mark set")));
 843                 }
 844                 cur.resetAnchor();
 845                 break;
 846
 847         case LFUN_SCREEN_RECENTER:
 848                 center();
 849                 break;
 850
 851         case LFUN_BIBTEX_DATABASE_ADD: {
 852                 Cursor tmpcur = cursor_;
 853                 bv_funcs::findInset(tmpcur, Inset::BIBTEX_CODE, false);
 854                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 855                                                 Inset::BIBTEX_CODE);
 856                 if (inset) {
 857                         if (inset->addDatabase(to_utf8(cmd.argument())))
 858                                 buffer_.updateBibfilesCache();
 859                 }
 860                 break;
 861         }
 862
 863         case LFUN_BIBTEX_DATABASE_DEL: {
 864                 Cursor tmpcur = cursor_;
 865                 bv_funcs::findInset(tmpcur, Inset::BIBTEX_CODE, false);
 866                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 867                                                 Inset::BIBTEX_CODE);
 868                 if (inset) {
 869                         if (inset->delDatabase(to_utf8(cmd.argument())))
 870                                 buffer_.updateBibfilesCache();
 871                 }
 872                 break;
 873         }
 874
 875         case LFUN_WORDS_COUNT: {
 876                 DocIterator from, to;
 877                 if (cur.selection()) {
 878                         from = cur.selectionBegin();
 879                         to = cur.selectionEnd();
 880                 } else {
 881                         from = doc_iterator_begin(buffer_.inset());
 882                         to = doc_iterator_end(buffer_.inset());
 883                 }
 884                 int const count = countWords(from, to);
 885                 docstring message;
 886                 if (count != 1) {
 887                         if (cur.selection())
 888                                 message = bformat(_("%1$d words in selection."),
 889                                           count);
 890                                 else
 891                                         message = bformat(_("%1$d words in document."),
 892                                                           count);
 893                 }
 894                 else {
 895                         if (cur.selection())
 896                                 message = _("One word in selection.");
 897                         else
 898                                 message = _("One word in document.");
 899                 }
 900
 901                 Alert::information(_("Count words"), message);
 902         }
 903                 break;
 904
 905         case LFUN_BUFFER_TOGGLE_COMPRESSION:
 906                 // turn compression on/off
 907                 buffer_.params().compressed = !buffer_.params().compressed;
 908                 break;
 909
 910         case LFUN_NEXT_INSET_TOGGLE: {
 911                 // this is the real function we want to invoke
 912                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
 913                 // if there is an inset at cursor, see whether it
 914                 // wants to toggle.
 915                 Inset * inset = cur.nextInset();
 916                 if (inset) {
 917                         if (inset->isActive()) {
 918                                 Cursor tmpcur = cur;
 919                                 tmpcur.pushLeft(*inset);
 920                                 inset->dispatch(tmpcur, tmpcmd);
 921                                 if (tmpcur.result().dispatched()) {
 922                                         cur.dispatched();
 923                                 }
 924                         } else if (inset->editable() == Inset::IS_EDITABLE) {
 925                                 inset->edit(cur, true);
 926                         }
 927                 }
 928                 // if it did not work, try the underlying inset.
 929                 if (!cur.result().dispatched())
 930                         cur.dispatch(tmpcmd);
 931
 932                 if (cur.result().dispatched())
 933                         cur.clearSelection();
 934
 935                 break;
 936         }
 937
 938         default:
 939                 updateFlags = Update::None;
 940         }
 941
 942         return updateFlags;
 943 }
 944
 945
 946 docstring const BufferView::requestSelection()
 947 {
 948         Cursor & cur = cursor_;
 949
 950         if (!cur.selection()) {
 951                 xsel_cache_.set = false;
 952                 return docstring();
 953         }
 954
 955         if (!xsel_cache_.set ||
 956             cur.top() != xsel_cache_.cursor ||
 957             cur.anchor_.top() != xsel_cache_.anchor)
 958         {
 959                 xsel_cache_.cursor = cur.top();
 960                 xsel_cache_.anchor = cur.anchor_.top();
 961                 xsel_cache_.set = cur.selection();
 962                 return cur.selectionAsString(false);
 963         }
 964         return docstring();
 965 }
 966
 967
 968 void BufferView::clearSelection()
 969 {
 970         cursor_.clearSelection();
 971         // Clear the selection buffer. Otherwise a subsequent
 972         // middle-mouse-button paste would use the selection buffer,
 973         // not the more current external selection.
 974         cap::clearSelection();
 975         xsel_cache_.set = false;
 976         // The buffer did not really change, but this causes the
 977         // redraw we need because we cleared the selection above.
 978         buffer_.changed();
 979 }
 980
 981
 982 void BufferView::resize(int width, int height)
 983 {
 984         // Update from work area
 985         width_ = width;
 986         height_ = height;
 987
 988         updateMetrics(false);
 989 }
 990
 991
 992 Inset const * BufferView::getCoveringInset(Text const & text, int x, int y)
 993 {
 994         pit_type pit = text_metrics_[&text].getPitNearY(y);
 995         BOOST_ASSERT(pit != -1);
 996         Paragraph const & par = text.getPar(pit);
 997
 998         LYXERR(Debug::DEBUG)
 999                 << BOOST_CURRENT_FUNCTION
1000                 << ": x: " << x
1001                 << " y: " << y
1002                 << "  pit: " << pit
1003                 << endl;
1004         InsetList::const_iterator iit = par.insetlist.begin();
1005         InsetList::const_iterator iend = par.insetlist.end();
1006         for (; iit != iend; ++iit) {
1007                 Inset * const inset = iit->inset;
1008                 if (inset->covers(*this, x, y)) {
1009                         if (!inset->descendable())
1010                                 // No need to go further down if the inset is not
1011                                 // descendable.
1012                                 return inset;
1013
1014                         size_t cell_number = inset->nargs();
1015                         // Check all the inner cell.
1016                         for (size_t i = 0; i != cell_number; ++i) {
1017                                 Text const * inner_text = inset->getText(i);
1018                                 if (inner_text) {
1019                                         // Try deeper.
1020                                         Inset const * inset_deeper =
1021                                                 getCoveringInset(*inner_text, x, y);
1022                                         if (inset_deeper)
1023                                                 return inset_deeper;
1024                                 }
1025                         }
1026
1027                         LYXERR(Debug::DEBUG)
1028                                 << BOOST_CURRENT_FUNCTION
1029                                 << ": Hit inset: " << inset << endl;
1030                         return inset;
1031                 }
1032         }
1033         LYXERR(Debug::DEBUG)
1034                 << BOOST_CURRENT_FUNCTION
1035                 << ": No inset hit. " << endl;
1036         return 0;
1037 }
1038
1039
1040 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
1041 {
1042         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1043
1044         // This is only called for mouse related events including
1045         // LFUN_FILE_OPEN generated by drag-and-drop.
1046         FuncRequest cmd = cmd0;
1047
1048         Cursor cur(*this);
1049         cur.push(buffer_.inset());
1050         cur.selection() = cursor_.selection();
1051
1052         // Either the inset under the cursor or the
1053         // surrounding Text will handle this event.
1054
1055         // make sure we stay within the screen...
1056         cmd.y = min(max(cmd.y, -1), height_);
1057
1058         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1059
1060                 // Get inset under mouse, if there is one.
1061                 Inset const * covering_inset =
1062                         getCoveringInset(buffer_.text(), cmd.x, cmd.y);
1063                 if (covering_inset == last_inset_)
1064                         // Same inset, no need to do anything...
1065                         return false;
1066
1067                 bool need_redraw = false;
1068                 // const_cast because of setMouseHover().
1069                 Inset * inset = const_cast<Inset *>(covering_inset);
1070                 if (last_inset_)
1071                         // Remove the hint on the last hovered inset (if any).
1072                         need_redraw |= last_inset_->setMouseHover(false);
1073                 if (inset)
1074                         // Highlighted the newly hovered inset (if any).
1075                         need_redraw |= inset->setMouseHover(true);
1076                 last_inset_ = inset;
1077
1078                 // if last metrics update was in singlepar mode, WorkArea::redraw() will
1079                 // not expose the button for redraw. We adjust here the metrics dimension
1080                 // to enable a full redraw.
1081                 // FIXME: It is possible to redraw only the area around the button!
1082                 if (need_redraw
1083                         && metrics_info_.update_strategy == SingleParUpdate) {
1084                         // FIXME: It should be possible to redraw only the area around
1085                         // the button by doing this:
1086                         //
1087                         //metrics_info_.singlepar = false;
1088                         //metrics_info_.y1 = ymin of button;
1089                         //metrics_info_.y2 = ymax of button;
1090                         //
1091                         // Unfortunately, BufferView::draw() does not distinguish
1092                         // between background updates and text updates. So we use the hammer
1093                         // solution for now. We could also avoid the updateMetrics() below
1094                         // by using the first and last pit of the CoordCache. Have a look
1095                         // at Text::getPitNearY() to see what I mean.
1096                         //
1097                         //metrics_info_.pit1 = first pit of CoordCache;
1098                         //metrics_info_.pit2 = last pit of CoordCache;
1099                         //metrics_info_.singlepar = false;
1100                         //metrics_info_.y1 = 0;
1101                         //metrics_info_.y2 = height_;
1102                         //
1103                         updateMetrics(false);
1104                 }
1105
1106                 // This event (moving without mouse click) is not passed further.
1107                 // This should be changed if it is further utilized.
1108                 return need_redraw;
1109         }
1110
1111         // Build temporary cursor.
1112         Inset * inset = text_metrics_[&buffer_.text()].editXY(cur, cmd.x, cmd.y);
1113
1114         // Put anchor at the same position.
1115         cur.resetAnchor();
1116
1117         // Try to dispatch to an non-editable inset near this position
1118         // via the temp cursor. If the inset wishes to change the real
1119         // cursor it has to do so explicitly by using
1120         //  cur.bv().cursor() = cur;  (or similar)
1121         if (inset) {
1122                 inset->dispatch(cur, cmd);
1123         }
1124
1125         // Now dispatch to the temporary cursor. If the real cursor should
1126         // be modified, the inset's dispatch has to do so explicitly.
1127         if (!cur.result().dispatched())
1128                 cur.dispatch(cmd);
1129
1130         //Do we have a selection?
1131         theSelection().haveSelection(cursor().selection());
1132
1133         // Redraw if requested and necessary.
1134         if (cur.result().dispatched() && cur.result().update())
1135                 return update(cur.result().update());
1136
1137         return false;
1138 }
1139
1140
1141 void BufferView::scroll(int /*lines*/)
1142 {
1143 //      Text const * t = buffer_.text();
1144 //      int const line_height = defaultRowHeight();
1145 //
1146 //      // The new absolute coordinate
1147 //      int new_top_y = top_y() + lines * line_height;
1148 //
1149 //      // Restrict to a valid value
1150 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
1151 //      new_top_y = std::max(0, new_top_y);
1152 //
1153 //      scrollDocView(new_top_y);
1154 //
1155 }
1156
1157
1158 void BufferView::setCursorFromRow(int row)
1159 {
1160         int tmpid = -1;
1161         int tmppos = -1;
1162
1163         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
1164
1165         cursor_.reset(buffer_.inset());
1166         if (tmpid == -1)
1167                 buffer_.text().setCursor(cursor_, 0, 0);
1168         else
1169                 buffer_.text().setCursor(cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
1170 }
1171
1172
1173 void BufferView::gotoLabel(docstring const & label)
1174 {
1175         for (InsetIterator it = inset_iterator_begin(buffer_.inset()); it; ++it) {
1176                 vector<docstring> labels;
1177                 it->getLabelList(buffer_, labels);
1178                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1179                         setCursor(it);
1180                         update();
1181                         return;
1182                 }
1183         }
1184 }
1185
1186
1187 TextMetrics const & BufferView::textMetrics(Text const * t) const
1188 {
1189         return const_cast<BufferView *>(this)->textMetrics(t);
1190 }
1191
1192
1193 TextMetrics & BufferView::textMetrics(Text const * t)
1194 {
1195         TextMetricsCache::iterator tmc_it  = text_metrics_.find(t);
1196         if (tmc_it == text_metrics_.end()) {
1197                 tmc_it = text_metrics_.insert(
1198                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
1199         }
1200         return tmc_it->second;
1201 }
1202
1203
1204 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
1205                 pit_type pit) const
1206 {
1207         return textMetrics(t).parMetrics(pit);
1208 }
1209
1210
1211 int BufferView::workHeight() const
1212 {
1213         return height_;
1214 }
1215
1216
1217 void BufferView::setCursor(DocIterator const & dit)
1218 {
1219         size_t const n = dit.depth();
1220         for (size_t i = 0; i < n; ++i)
1221                 dit[i].inset().edit(cursor_, true);
1222
1223         cursor_.setCursor(dit);
1224         cursor_.selection() = false;
1225 }
1226
1227
1228 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
1229 {
1230         // Would be wrong to delete anything if we have a selection.
1231         if (cur.selection())
1232                 return false;
1233
1234         bool need_anchor_change = false;
1235         bool changed = cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1236                 need_anchor_change);
1237
1238         if (need_anchor_change)
1239                 cur.resetAnchor();
1240
1241         if (!changed)
1242                 return false;
1243
1244         updateLabels(buffer_);
1245
1246         updateMetrics(false);
1247         buffer_.changed();
1248         return true;
1249 }
1250
1251
1252 bool BufferView::mouseSetCursor(Cursor & cur)
1253 {
1254         BOOST_ASSERT(&cur.bv() == this);
1255
1256         // this event will clear selection so we save selection for
1257         // persistent selection
1258         cap::saveSelection(cursor());
1259
1260         // Has the cursor just left the inset?
1261         bool badcursor = false;
1262         bool leftinset = (&cursor_.inset() != &cur.inset());
1263         if (leftinset)
1264                 badcursor = notifyCursorLeaves(cursor_, cur);
1265
1266         // do the dEPM magic if needed
1267         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
1268         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
1269         // the leftinset bool would not be necessary (badcursor instead).
1270         bool update = leftinset;
1271         if (!badcursor && cursor_.inTexted())
1272                 update |= checkDepm(cur, cursor_);
1273
1274         // if the cursor was in an empty script inset and the new
1275         // position is in the nucleus of the inset, notifyCursorLeaves
1276         // will kill the script inset itself. So we check all the
1277         // elements of the cursor to make sure that they are correct.
1278         // For an example, see bug 2933:
1279         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1280         // The code below could maybe be moved to a DocIterator method.
1281         //lyxerr << "cur before " << cur <<std::endl;
1282         DocIterator dit(cur.inset());
1283         dit.push_back(cur.bottom());
1284         size_t i = 1;
1285         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1286                 dit.push_back(cur[i]);
1287                 ++i;
1288         }
1289         //lyxerr << "5 cur after" << dit <<std::endl;
1290
1291         cursor_.setCursor(dit);
1292         cursor_.boundary(cur.boundary());
1293         cursor_.clearSelection();
1294         finishUndo();
1295         return update;
1296 }
1297
1298
1299 void BufferView::putSelectionAt(DocIterator const & cur,
1300                                 int length, bool backwards)
1301 {
1302         cursor_.clearSelection();
1303
1304         setCursor(cur);
1305
1306         if (length) {
1307                 if (backwards) {
1308                         cursor_.pos() += length;
1309                         cursor_.setSelection(cursor_, -length);
1310                 } else
1311                         cursor_.setSelection(cursor_, length);
1312         }
1313 }
1314
1315
1316 Cursor & BufferView::cursor()
1317 {
1318         return cursor_;
1319 }
1320
1321
1322 Cursor const & BufferView::cursor() const
1323 {
1324         return cursor_;
1325 }
1326
1327
1328 pit_type BufferView::anchor_ref() const
1329 {
1330         return anchor_ref_;
1331 }
1332
1333
1334 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1335 {
1336         return metrics_info_;
1337 }
1338
1339
1340 // FIXME: We should split-up updateMetrics() for the singlepar case.
1341 void BufferView::updateMetrics(bool singlepar)
1342 {
1343         Text & buftext = buffer_.text();
1344         pit_type const npit = int(buftext.paragraphs().size());
1345
1346         if (anchor_ref_ > int(npit - 1)) {
1347                 anchor_ref_ = int(npit - 1);
1348                 offset_ref_ = 0;
1349         }
1350
1351         if (!singlepar) {
1352                 // Clear out the position cache in case of full screen redraw,
1353                 coord_cache_.clear();
1354
1355                 // Clear out paragraph metrics to avoid having invalid metrics
1356                 // in the cache from paragraphs not relayouted below
1357                 // The complete text metrics will be redone.
1358                 text_metrics_.clear();
1359         }
1360
1361         TextMetrics & tm = textMetrics(&buftext);
1362
1363         pit_type const bottom_pit = cursor_.bottom().pit();
1364         // If the paragraph metrics has changed, we can not
1365         // use the singlepar optimisation.
1366         if (singlepar
1367                 // In Single Paragraph mode, rebreak only
1368                 // the (main text, not inset!) paragraph containing the cursor.
1369                 // (if this paragraph contains insets etc., rebreaking will
1370                 // recursively descend)
1371                 && !tm.redoParagraph(bottom_pit)) {
1372
1373                 updateOffsetRef();
1374                 // collect cursor paragraph iter bounds
1375                 ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
1376                 int y1 = pm.position() - pm.ascent();
1377                 int y2 = pm.position() + pm.descent();
1378                 metrics_info_ = ViewMetricsInfo(bottom_pit, bottom_pit, y1, y2,
1379                         SingleParUpdate, npit);
1380                 LYXERR(Debug::PAINTING)
1381                         << BOOST_CURRENT_FUNCTION
1382                         << "\ny1: " << y1
1383                         << " y2: " << y2
1384                         << " pit: " << bottom_pit
1385                         << " singlepar: " << singlepar
1386                         << endl;
1387                 return;
1388         }
1389
1390         pit_type const pit = anchor_ref_;
1391         int pit1 = pit;
1392         int pit2 = pit;
1393
1394         // Rebreak anchor paragraph.
1395         tm.redoParagraph(pit);
1396
1397         updateOffsetRef();
1398
1399         int y0 = tm.parMetrics(pit).ascent() - offset_ref_;
1400
1401         // Redo paragraphs above anchor if necessary.
1402         int y1 = y0;
1403         while (y1 > 0 && pit1 > 0) {
1404                 y1 -= tm.parMetrics(pit1).ascent();
1405                 --pit1;
1406                 tm.redoParagraph(pit1);
1407                 y1 -= tm.parMetrics(pit1).descent();
1408         }
1409
1410         // Take care of ascent of first line
1411         y1 -= tm.parMetrics(pit1).ascent();
1412
1413         // Normalize anchor for next time
1414         anchor_ref_ = pit1;
1415         offset_ref_ = -y1;
1416
1417         // Grey at the beginning is ugly
1418         if (pit1 == 0 && y1 > 0) {
1419                 y0 -= y1;
1420                 y1 = 0;
1421                 anchor_ref_ = 0;
1422         }
1423
1424         // Redo paragraphs below the anchor if necessary.
1425         int y2 = y0;
1426         while (y2 < height_ && pit2 < int(npit) - 1) {
1427                 y2 += tm.parMetrics(pit2).descent();
1428                 ++pit2;
1429                 tm.redoParagraph(pit2);
1430                 y2 += tm.parMetrics(pit2).ascent();
1431         }
1432
1433         // Take care of descent of last line
1434         y2 += tm.parMetrics(pit2).descent();
1435
1436         LYXERR(Debug::PAINTING)
1437                 << BOOST_CURRENT_FUNCTION
1438                 << "\n y1: " << y1
1439                 << " y2: " << y2
1440                 << " pit1: " << pit1
1441                 << " pit2: " << pit2
1442                 << " npit: " << npit
1443                 << " singlepar: " << singlepar
1444                 << endl;
1445
1446         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2,
1447                 FullScreenUpdate, npit);
1448
1449         if (lyxerr.debugging(Debug::WORKAREA)) {
1450                 LYXERR(Debug::WORKAREA) << "BufferView::updateMetrics" << endl;
1451                 coord_cache_.dump();
1452         }
1453 }
1454
1455
1456 void BufferView::menuInsertLyXFile(string const & filenm)
1457 {
1458         BOOST_ASSERT(cursor_.inTexted());
1459         string filename = filenm;
1460
1461         if (filename.empty()) {
1462                 // Launch a file browser
1463                 // FIXME UNICODE
1464                 string initpath = lyxrc.document_path;
1465                 string const trypath = buffer_.filePath();
1466                 // If directory is writeable, use this as default.
1467                 if (isDirWriteable(FileName(trypath)))
1468                         initpath = trypath;
1469
1470                 // FIXME UNICODE
1471                 FileDialog fileDlg(_("Select LyX document to insert"),
1472                         LFUN_FILE_INSERT,
1473                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1474                         make_pair(_("Examples|#E#e"),
1475                                     from_utf8(addPath(package().system_support().absFilename(),
1476                                     "examples"))));
1477
1478                 FileDialog::Result result =
1479                         fileDlg.open(from_utf8(initpath),
1480                                      FileFilterList(_("LyX Documents (*.lyx)")),
1481                                      docstring());
1482
1483                 if (result.first == FileDialog::Later)
1484                         return;
1485
1486                 // FIXME UNICODE
1487                 filename = to_utf8(result.second);
1488
1489                 // check selected filename
1490                 if (filename.empty()) {
1491                         // emit message signal.
1492                         message(_("Canceled."));
1493                         return;
1494                 }
1495         }
1496
1497         // Get absolute path of file and add ".lyx"
1498         // to the filename if necessary
1499         filename = fileSearch(string(), filename, "lyx").absFilename();
1500
1501         docstring const disp_fn = makeDisplayPath(filename);
1502         // emit message signal.
1503         message(bformat(_("Inserting document %1$s..."), disp_fn));
1504
1505         docstring res;
1506         Buffer buf("", false);
1507         if (lyx::loadLyXFile(&buf, FileName(filename))) {
1508                 ErrorList & el = buffer_.errorList("Parse");
1509                 // Copy the inserted document error list into the current buffer one.
1510                 el = buf.errorList("Parse");
1511                 recordUndo(cursor_);
1512                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1513                                              buf.params().getTextClass_ptr(), el);
1514                 res = _("Document %1$s inserted.");
1515         } else
1516                 res = _("Could not insert document %1$s");
1517
1518         // emit message signal.
1519         message(bformat(res, disp_fn));
1520         buffer_.errors("Parse");
1521         updateMetrics(false);
1522 }
1523
1524
1525 void BufferView::draw(frontend::Painter & pain)
1526 {
1527         PainterInfo pi(this, pain);
1528         // Should the whole screen, including insets, be refreshed?
1529         // FIXME: We should also distinguish DecorationUpdate to avoid text
1530         // drawing if possible. This is not possible to do easily right now
1531         // because of the single backing pixmap.
1532         pi.full_repaint = metrics_info_.update_strategy != SingleParUpdate;
1533
1534         if (pi.full_repaint)
1535                 // Clear background (if not delegated to rows)
1536                 pain.fillRectangle(0, metrics_info_.y1, width_,
1537                         metrics_info_.y2 - metrics_info_.y1,
1538                         buffer_.inset().backgroundColor());
1539
1540         LYXERR(Debug::PAINTING) << "\t\t*** START DRAWING ***" << endl;
1541         Text & text = buffer_.text();
1542         TextMetrics const & tm = text_metrics_[&text];
1543         int y = metrics_info_.y1 + tm.parMetrics(metrics_info_.p1).ascent();
1544         if (!pi.full_repaint)
1545                 tm.drawParagraph(pi, metrics_info_.p1, 0, y);
1546         else
1547                 tm.draw(pi, 0, y);
1548         LYXERR(Debug::PAINTING) << "\n\t\t*** END DRAWING  ***" << endl;
1549
1550         // and grey out above (should not happen later)
1551 //      lyxerr << "par ascent: " << text.getPar(metrics_info_.p1).ascent() << endl;
1552         if (metrics_info_.y1 > 0
1553                 && metrics_info_.update_strategy == FullScreenUpdate)
1554                 pain.fillRectangle(0, 0, width_, metrics_info_.y1, Color::bottomarea);
1555
1556         // and possibly grey out below
1557 //      lyxerr << "par descent: " << text.getPar(metrics_info_.p1).ascent() << endl;
1558         if (metrics_info_.y2 < height_
1559                 && metrics_info_.update_strategy == FullScreenUpdate)
1560                 pain.fillRectangle(0, metrics_info_.y2, width_,
1561                         height_ - metrics_info_.y2, Color::bottomarea);
1562 }
1563
1564 } // namespace lyx