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) {
 255                 //FIXME: updateMetrics() does not update paragraph position
 256                 // This is done at draw() time. So we need a redraw!
 257                 buffer_.changed();
 258                 if (fitCursor())
 259                         updateMetrics(false);
 260         }
 261
 262         // tell the frontend to update the screen.
 263         return true;
 264 }
 265
 266
 267 void BufferView::updateScrollbar()
 268 {
 269         Text & t = buffer_.text();
 270         TextMetrics & tm = text_metrics_[&t];
 271
 272         int const parsize = int(t.paragraphs().size() - 1);
 273         if (anchor_ref_ >  parsize)  {
 274                 anchor_ref_ = parsize;
 275                 offset_ref_ = 0;
 276         }
 277
 278         LYXERR(Debug::GUI)
 279                 << BOOST_CURRENT_FUNCTION
 280                 << " Updating scrollbar: height: " << t.paragraphs().size()
 281                 << " curr par: " << cursor_.bottom().pit()
 282                 << " default height " << defaultRowHeight() << endl;
 283
 284         // It would be better to fix the scrollbar to understand
 285         // values in [0..1] and divide everything by wh
 286
 287         // estimated average paragraph height:
 288         if (wh_ == 0)
 289                 wh_ = height_ / 4;
 290
 291         int h = tm.parMetrics(anchor_ref_).height();
 292
 293         // Normalize anchor/offset (MV):
 294         while (offset_ref_ > h && anchor_ref_ < parsize) {
 295                 anchor_ref_++;
 296                 offset_ref_ -= h;
 297                 h = tm.parMetrics(anchor_ref_).height();
 298         }
 299         // Look at paragraph heights on-screen
 300         int sumh = 0;
 301         int nh = 0;
 302         for (pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 303                 if (sumh > height_)
 304                         break;
 305                 int const h2 = tm.parMetrics(pit).height();
 306                 sumh += h2;
 307                 nh++;
 308         }
 309
 310         BOOST_ASSERT(nh);
 311         int const hav = sumh / nh;
 312         // More realistic average paragraph height
 313         if (hav > wh_)
 314                 wh_ = hav;
 315
 316         BOOST_ASSERT(h);
 317         scrollbarParameters_.height = (parsize + 1) * wh_;
 318         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 319         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 320 }
 321
 322
 323 ScrollbarParameters const & BufferView::scrollbarParameters() const
 324 {
 325         return scrollbarParameters_;
 326 }
 327
 328
 329 void BufferView::scrollDocView(int value)
 330 {
 331         LYXERR(Debug::GUI) << BOOST_CURRENT_FUNCTION
 332                            << "[ value = " << value << "]" << endl;
 333
 334         Text & t = buffer_.text();
 335         TextMetrics & tm = text_metrics_[&t];
 336
 337         float const bar = value / float(wh_ * t.paragraphs().size());
 338
 339         anchor_ref_ = int(bar * t.paragraphs().size());
 340         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 341                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 342
 343         tm.redoParagraph(anchor_ref_);
 344         int const h = tm.parMetrics(anchor_ref_).height();
 345         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 346         updateMetrics(false);
 347         buffer_.changed();
 348 }
 349
 350
 351 void BufferView::setCursorFromScrollbar()
 352 {
 353         TextMetrics & tm = text_metrics_[&buffer_.text()];
 354
 355         int const height = 2 * defaultRowHeight();
 356         int const first = height;
 357         int const last = height_ - height;
 358         Cursor & cur = cursor_;
 359
 360         bv_funcs::CurStatus st = bv_funcs::status(this, cur);
 361
 362         switch (st) {
 363         case bv_funcs::CUR_ABOVE:
 364                 // We reset the cursor because bv_funcs::status() does not
 365                 // work when the cursor is within mathed.
 366                 cur.reset(buffer_.inset());
 367                 tm.setCursorFromCoordinates(cur, 0, first);
 368                 cur.clearSelection();
 369                 break;
 370         case bv_funcs::CUR_BELOW:
 371                 // We reset the cursor because bv_funcs::status() does not
 372                 // work when the cursor is within mathed.
 373                 cur.reset(buffer_.inset());
 374                 tm.setCursorFromCoordinates(cur, 0, last);
 375                 cur.clearSelection();
 376                 break;
 377         case bv_funcs::CUR_INSIDE:
 378                 int const y = bv_funcs::getPos(*this, cur, cur.boundary()).y_;
 379                 int const newy = min(last, max(y, first));
 380                 if (y != newy) {
 381                         cur.reset(buffer_.inset());
 382                         tm.setCursorFromCoordinates(cur, 0, newy);
 383                 }
 384         }
 385 }
 386
 387
 388 Change const BufferView::getCurrentChange() const
 389 {
 390         if (!cursor_.selection())
 391                 return Change(Change::UNCHANGED);
 392
 393         DocIterator dit = cursor_.selectionBegin();
 394         return dit.paragraph().lookupChange(dit.pos());
 395 }
 396
 397
 398 void BufferView::saveBookmark(unsigned int idx)
 399 {
 400         // tenatively save bookmark, id and pos will be used to
 401         // acturately locate a bookmark in a 'live' lyx session.
 402         // pit and pos will be updated with bottom level pit/pos
 403         // when lyx exits.
 404         LyX::ref().session().bookmarks().save(
 405                 FileName(buffer_.fileName()),
 406                 cursor_.bottom().pit(),
 407                 cursor_.bottom().pos(),
 408                 cursor_.paragraph().id(),
 409                 cursor_.pos(),
 410                 idx
 411         );
 412         if (idx)
 413                 // emit message signal.
 414                 message(_("Save bookmark"));
 415 }
 416
 417
 418 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 419         int top_id, pos_type top_pos)
 420 {
 421         bool success = false;
 422         DocIterator doc_it;
 423
 424         cursor_.clearSelection();
 425
 426         // if a valid par_id is given, try it first
 427         // This is the case for a 'live' bookmark when unique paragraph ID
 428         // is used to track bookmarks.
 429         if (top_id > 0) {
 430                 ParIterator par = buffer_.getParFromID(top_id);
 431                 if (par != buffer_.par_iterator_end()) {
 432                         doc_it = makeDocIterator(par, min(par->size(), top_pos));
 433                         // Some slices of the iterator may not be
 434                         // reachable (e.g. closed collapsable inset)
 435                         // so the dociterator may need to be
 436                         // shortened. Otherwise, setCursor may crash
 437                         // lyx when the cursor can not be set to these
 438                         // insets.
 439                         size_t const n = doc_it.depth();
 440                         for (size_t i = 0; i < n; ++i)
 441                                 if (doc_it[i].inset().editable() != Inset::HIGHLY_EDITABLE) {
 442                                         doc_it.resize(i);
 443                                         break;
 444                                 }
 445                         success = true;
 446                 }
 447         }
 448
 449         // if top_id == 0, or searching through top_id failed
 450         // This is the case for a 'restored' bookmark when only bottom
 451         // (document level) pit was saved. Because of this, bookmark
 452         // restoration is inaccurate. If a bookmark was within an inset,
 453         // it will be restored to the left of the outmost inset that contains
 454         // the bookmark.
 455         if (static_cast<size_t>(bottom_pit) < buffer_.paragraphs().size()) {
 456                 doc_it = doc_iterator_begin(buffer_.inset());
 457                 doc_it.pit() = bottom_pit;
 458                 doc_it.pos() = min(bottom_pos, doc_it.paragraph().size());
 459                 success = true;
 460         }
 461
 462         if (success) {
 463                 // Note: only bottom (document) level pit is set.
 464                 setCursor(doc_it);
 465                 // set the current font.
 466                 cursor_.setCurrentFont();
 467                 // center the screen on this new position.
 468                 center();
 469         }
 470
 471         return success;
 472 }
 473
 474
 475 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 476 {
 477         if (lyxrc.rtl_support) {
 478                 if (cursor_.real_current_font.isRightToLeft()) {
 479                         if (intl_->keymap == Intl::PRIMARY)
 480                                 intl_->keyMapSec();
 481                 } else {
 482                         if (intl_->keymap == Intl::SECONDARY)
 483                                 intl_->keyMapPrim();
 484                 }
 485         }
 486
 487         intl_->getTransManager().translateAndInsert(c, t, cur);
 488 }
 489
 490
 491 int BufferView::workWidth() const
 492 {
 493         return width_;
 494 }
 495
 496
 497 void BufferView::updateOffsetRef()
 498 {
 499         // No need to update offset_ref_ in this case.
 500         if (!need_centering_)
 501                 return;
 502
 503         // We are not properly started yet, delay until resizing is
 504         // done.
 505         if (height_ == 0)
 506                 return;
 507
 508         CursorSlice & bot = cursor_.bottom();
 509         TextMetrics & tm = text_metrics_[bot.text()];
 510         ParagraphMetrics const & pm = tm.parMetrics(bot.pit());
 511         Point p = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary());
 512         offset_ref_ = p.y_ + pm.ascent() - height_ / 2;
 513
 514         need_centering_ = false;
 515 }
 516
 517
 518 void BufferView::center()
 519 {
 520         anchor_ref_ = cursor_.bottom().pit();
 521         need_centering_ = true;
 522 }
 523
 524
 525 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 526 {
 527         FuncStatus flag;
 528
 529         Cursor & cur = cursor_;
 530
 531         switch (cmd.action) {
 532
 533         case LFUN_UNDO:
 534                 flag.enabled(!buffer_.undostack().empty());
 535                 break;
 536         case LFUN_REDO:
 537                 flag.enabled(!buffer_.redostack().empty());
 538                 break;
 539         case LFUN_FILE_INSERT:
 540         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 541         case LFUN_FILE_INSERT_PLAINTEXT:
 542         case LFUN_BOOKMARK_SAVE:
 543                 // FIXME: Actually, these LFUNS should be moved to Text
 544                 flag.enabled(cur.inTexted());
 545                 break;
 546         case LFUN_FONT_STATE:
 547         case LFUN_LABEL_INSERT:
 548         case LFUN_PARAGRAPH_GOTO:
 549         // FIXME handle non-trivially
 550         case LFUN_OUTLINE_UP:
 551         case LFUN_OUTLINE_DOWN:
 552         case LFUN_OUTLINE_IN:
 553         case LFUN_OUTLINE_OUT:
 554         case LFUN_NOTE_NEXT:
 555         case LFUN_REFERENCE_NEXT:
 556         case LFUN_WORD_FIND:
 557         case LFUN_WORD_REPLACE:
 558         case LFUN_MARK_OFF:
 559         case LFUN_MARK_ON:
 560         case LFUN_MARK_TOGGLE:
 561         case LFUN_SCREEN_RECENTER:
 562         case LFUN_BIBTEX_DATABASE_ADD:
 563         case LFUN_BIBTEX_DATABASE_DEL:
 564         case LFUN_WORDS_COUNT:
 565         case LFUN_NEXT_INSET_TOGGLE:
 566                 flag.enabled(true);
 567                 break;
 568
 569         case LFUN_LABEL_GOTO: {
 570                 flag.enabled(!cmd.argument().empty()
 571                     || getInsetByCode<InsetRef>(cur, Inset::REF_CODE));
 572                 break;
 573         }
 574
 575         case LFUN_CHANGES_TRACK:
 576                 flag.enabled(true);
 577                 flag.setOnOff(buffer_.params().trackChanges);
 578                 break;
 579
 580         case LFUN_CHANGES_OUTPUT:
 581                 flag.enabled(true);
 582                 flag.setOnOff(buffer_.params().outputChanges);
 583                 break;
 584
 585         case LFUN_CHANGES_MERGE:
 586         case LFUN_CHANGE_NEXT:
 587         case LFUN_ALL_CHANGES_ACCEPT:
 588         case LFUN_ALL_CHANGES_REJECT:
 589                 // TODO: context-sensitive enabling of LFUNs
 590                 // In principle, these command should only be enabled if there
 591                 // is a change in the document. However, without proper
 592                 // optimizations, this will inevitably result in poor performance.
 593                 flag.enabled(true);
 594                 break;
 595
 596         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 597                 flag.setOnOff(buffer_.params().compressed);
 598                 break;
 599         }
 600
 601         case LFUN_SCREEN_UP:
 602         case LFUN_SCREEN_DOWN:
 603                 flag.enabled(true);
 604                 break;
 605
 606         // FIXME: LFUN_SCREEN_DOWN_SELECT should be removed from
 607         // everywhere else before this can enabled:
 608         case LFUN_SCREEN_UP_SELECT:
 609         case LFUN_SCREEN_DOWN_SELECT:
 610                 flag.enabled(false);
 611                 break;
 612
 613         default:
 614                 flag.enabled(false);
 615         }
 616
 617         return flag;
 618 }
 619
 620
 621 Update::flags BufferView::dispatch(FuncRequest const & cmd)
 622 {
 623         //lyxerr << BOOST_CURRENT_FUNCTION
 624         //       << [ cmd = " << cmd << "]" << endl;
 625
 626         // Make sure that the cached BufferView is correct.
 627         LYXERR(Debug::ACTION) << BOOST_CURRENT_FUNCTION
 628                 << " action[" << cmd.action << ']'
 629                 << " arg[" << to_utf8(cmd.argument()) << ']'
 630                 << " x[" << cmd.x << ']'
 631                 << " y[" << cmd.y << ']'
 632                 << " button[" << cmd.button() << ']'
 633                 << endl;
 634
 635         Cursor & cur = cursor_;
 636         // Default Update flags.
 637         Update::flags updateFlags = Update::Force | Update::FitCursor;
 638
 639         switch (cmd.action) {
 640
 641         case LFUN_UNDO:
 642                 cur.message(_("Undo"));
 643                 cur.clearSelection();
 644                 if (!textUndo(*this)) {
 645                         cur.message(_("No further undo information"));
 646                         updateFlags = Update::None;
 647                 }
 648                 break;
 649
 650         case LFUN_REDO:
 651                 cur.message(_("Redo"));
 652                 cur.clearSelection();
 653                 if (!textRedo(*this)) {
 654                         cur.message(_("No further redo information"));
 655                         updateFlags = Update::None;
 656                 }
 657                 break;
 658
 659         case LFUN_FILE_INSERT:
 660                 // FIXME UNICODE
 661                 menuInsertLyXFile(to_utf8(cmd.argument()));
 662                 break;
 663
 664         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 665                 // FIXME UNICODE
 666                 insertPlaintextFile(this, to_utf8(cmd.argument()), true);
 667                 break;
 668
 669         case LFUN_FILE_INSERT_PLAINTEXT:
 670                 // FIXME UNICODE
 671                 insertPlaintextFile(this, to_utf8(cmd.argument()), false);
 672                 break;
 673
 674         case LFUN_FONT_STATE:
 675                 cur.message(cur.currentState());
 676                 break;
 677
 678         case LFUN_BOOKMARK_SAVE:
 679                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 680                 break;
 681
 682         case LFUN_LABEL_GOTO: {
 683                 docstring label = cmd.argument();
 684                 if (label.empty()) {
 685                         InsetRef * inset =
 686                                 getInsetByCode<InsetRef>(cursor_,
 687                                                          Inset::REF_CODE);
 688                         if (inset) {
 689                                 label = inset->getParam("reference");
 690                                 // persistent=false: use temp_bookmark
 691                                 saveBookmark(0);
 692                         }
 693                 }
 694
 695                 if (!label.empty())
 696                         gotoLabel(label);
 697                 break;
 698         }
 699
 700         case LFUN_PARAGRAPH_GOTO: {
 701                 int const id = convert<int>(to_utf8(cmd.argument()));
 702                 int i = 0;
 703                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
 704                         b = theBufferList().next(b)) {
 705
 706                         ParIterator par = b->getParFromID(id);
 707                         if (par == b->par_iterator_end()) {
 708                                 LYXERR(Debug::INFO)
 709                                         << "No matching paragraph found! ["
 710                                         << id << "]." << endl;
 711                         } else {
 712                                 LYXERR(Debug::INFO)
 713                                         << "Paragraph " << par->id()
 714                                         << " found in buffer `"
 715                                         << b->fileName() << "'." << endl;
 716
 717                                 if (b == &buffer_) {
 718                                         // Set the cursor
 719                                         setCursor(makeDocIterator(par, 0));
 720                                 } else {
 721                                         // Switch to other buffer view and resend cmd
 722                                         theLyXFunc().dispatch(FuncRequest(
 723                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 724                                         theLyXFunc().dispatch(cmd);
 725                                         updateFlags = Update::None;
 726                                 }
 727                                 break;
 728                         }
 729                         ++i;
 730                 }
 731                 break;
 732         }
 733
 734         case LFUN_OUTLINE_UP:
 735                 toc::outline(toc::Up, cursor_);
 736                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 737                 updateLabels(buffer_);
 738                 break;
 739         case LFUN_OUTLINE_DOWN:
 740                 toc::outline(toc::Down, cursor_);
 741                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 742                 updateLabels(buffer_);
 743                 break;
 744         case LFUN_OUTLINE_IN:
 745                 toc::outline(toc::In, cursor_);
 746                 updateLabels(buffer_);
 747                 break;
 748         case LFUN_OUTLINE_OUT:
 749                 toc::outline(toc::Out, cursor_);
 750                 updateLabels(buffer_);
 751                 break;
 752
 753         case LFUN_NOTE_NEXT:
 754                 bv_funcs::gotoInset(this, Inset::NOTE_CODE, false);
 755                 break;
 756
 757         case LFUN_REFERENCE_NEXT: {
 758                 vector<Inset_code> tmp;
 759                 tmp.push_back(Inset::LABEL_CODE);
 760                 tmp.push_back(Inset::REF_CODE);
 761                 bv_funcs::gotoInset(this, tmp, true);
 762                 break;
 763         }
 764
 765         case LFUN_CHANGES_TRACK:
 766                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
 767                 break;
 768
 769         case LFUN_CHANGES_OUTPUT:
 770                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
 771                 if (buffer_.params().outputChanges) {
 772                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
 773                         bool xcolorsoul = LaTeXFeatures::isAvailable("soul") &&
 774                                           LaTeXFeatures::isAvailable("xcolor");
 775
 776                         if (!dvipost && !xcolorsoul) {
 777                                 Alert::warning(_("Changes not shown in LaTeX output"),
 778                                                _("Changes will not be highlighted in LaTeX output, "
 779                                                  "because neither dvipost nor xcolor/soul are installed.\n"
 780                                                  "Please install these packages or redefine "
 781                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
 782                         } else if (!xcolorsoul) {
 783                                 Alert::warning(_("Changes not shown in LaTeX output"),
 784                                                _("Changes will not be highlighted in LaTeX output "
 785                                                  "when using pdflatex, because xcolor and soul are not installed.\n"
 786                                                  "Please install both packages or redefine "
 787                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
 788                         }
 789                 }
 790                 break;
 791
 792         case LFUN_CHANGE_NEXT:
 793                 findNextChange(this);
 794                 break;
 795
 796         case LFUN_CHANGES_MERGE:
 797                 if (findNextChange(this))
 798                         showDialog("changes");
 799                 break;
 800
 801         case LFUN_ALL_CHANGES_ACCEPT:
 802                 // select complete document
 803                 cursor_.reset(buffer_.inset());
 804                 cursor_.selHandle(true);
 805                 buffer_.text().cursorBottom(cursor_);
 806                 // accept everything in a single step to support atomic undo
 807                 buffer_.text().acceptOrRejectChanges(cursor_, Text::ACCEPT);
 808                 break;
 809
 810         case LFUN_ALL_CHANGES_REJECT:
 811                 // select complete document
 812                 cursor_.reset(buffer_.inset());
 813                 cursor_.selHandle(true);
 814                 buffer_.text().cursorBottom(cursor_);
 815                 // reject everything in a single step to support atomic undo
 816                 // Note: reject does not work recursively; the user may have to repeat the operation
 817                 buffer_.text().acceptOrRejectChanges(cursor_, Text::REJECT);
 818                 break;
 819
 820         case LFUN_WORD_FIND:
 821                 find(this, cmd);
 822                 break;
 823
 824         case LFUN_WORD_REPLACE: {
 825                 bool has_deleted = false;
 826                 if (cur.selection()) {
 827                         DocIterator beg = cur.selectionBegin();
 828                         DocIterator end = cur.selectionEnd();
 829                         if (beg.pit() == end.pit()) {
 830                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
 831                                         if (cur.paragraph().isDeleted(p))
 832                                                 has_deleted = true;
 833                                 }
 834                         }
 835                 }
 836                 replace(this, cmd, has_deleted);
 837                 break;
 838         }
 839
 840         case LFUN_MARK_OFF:
 841                 cur.clearSelection();
 842                 cur.resetAnchor();
 843                 cur.message(from_utf8(N_("Mark off")));
 844                 break;
 845
 846         case LFUN_MARK_ON:
 847                 cur.clearSelection();
 848                 cur.mark() = true;
 849                 cur.resetAnchor();
 850                 cur.message(from_utf8(N_("Mark on")));
 851                 break;
 852
 853         case LFUN_MARK_TOGGLE:
 854                 cur.clearSelection();
 855                 if (cur.mark()) {
 856                         cur.mark() = false;
 857                         cur.message(from_utf8(N_("Mark removed")));
 858                 } else {
 859                         cur.mark() = true;
 860                         cur.message(from_utf8(N_("Mark set")));
 861                 }
 862                 cur.resetAnchor();
 863                 break;
 864
 865         case LFUN_SCREEN_RECENTER:
 866                 center();
 867                 break;
 868
 869         case LFUN_BIBTEX_DATABASE_ADD: {
 870                 Cursor tmpcur = cursor_;
 871                 bv_funcs::findInset(tmpcur, Inset::BIBTEX_CODE, false);
 872                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 873                                                 Inset::BIBTEX_CODE);
 874                 if (inset) {
 875                         if (inset->addDatabase(to_utf8(cmd.argument())))
 876                                 buffer_.updateBibfilesCache();
 877                 }
 878                 break;
 879         }
 880
 881         case LFUN_BIBTEX_DATABASE_DEL: {
 882                 Cursor tmpcur = cursor_;
 883                 bv_funcs::findInset(tmpcur, Inset::BIBTEX_CODE, false);
 884                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 885                                                 Inset::BIBTEX_CODE);
 886                 if (inset) {
 887                         if (inset->delDatabase(to_utf8(cmd.argument())))
 888                                 buffer_.updateBibfilesCache();
 889                 }
 890                 break;
 891         }
 892
 893         case LFUN_WORDS_COUNT: {
 894                 DocIterator from, to;
 895                 if (cur.selection()) {
 896                         from = cur.selectionBegin();
 897                         to = cur.selectionEnd();
 898                 } else {
 899                         from = doc_iterator_begin(buffer_.inset());
 900                         to = doc_iterator_end(buffer_.inset());
 901                 }
 902                 int const count = countWords(from, to);
 903                 docstring message;
 904                 if (count != 1) {
 905                         if (cur.selection())
 906                                 message = bformat(_("%1$d words in selection."),
 907                                           count);
 908                                 else
 909                                         message = bformat(_("%1$d words in document."),
 910                                                           count);
 911                 }
 912                 else {
 913                         if (cur.selection())
 914                                 message = _("One word in selection.");
 915                         else
 916                                 message = _("One word in document.");
 917                 }
 918
 919                 Alert::information(_("Count words"), message);
 920         }
 921                 break;
 922
 923         case LFUN_BUFFER_TOGGLE_COMPRESSION:
 924                 // turn compression on/off
 925                 buffer_.params().compressed = !buffer_.params().compressed;
 926                 break;
 927
 928         case LFUN_NEXT_INSET_TOGGLE: {
 929                 // this is the real function we want to invoke
 930                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
 931                 // if there is an inset at cursor, see whether it
 932                 // wants to toggle.
 933                 Inset * inset = cur.nextInset();
 934                 if (inset) {
 935                         if (inset->isActive()) {
 936                                 Cursor tmpcur = cur;
 937                                 tmpcur.pushLeft(*inset);
 938                                 inset->dispatch(tmpcur, tmpcmd);
 939                                 if (tmpcur.result().dispatched()) {
 940                                         cur.dispatched();
 941                                 }
 942                         } else if (inset->editable() == Inset::IS_EDITABLE) {
 943                                 inset->edit(cur, true);
 944                         }
 945                 }
 946                 // if it did not work, try the underlying inset.
 947                 if (!cur.result().dispatched())
 948                         cur.dispatch(tmpcmd);
 949
 950                 if (cur.result().dispatched())
 951                         cur.clearSelection();
 952
 953                 break;
 954         }
 955
 956         case LFUN_SCREEN_UP:
 957         case LFUN_SCREEN_DOWN: {
 958                 Point p = bv_funcs::getPos(*this, cur, cur.boundary());
 959                 if (p.y_ < 0 || p.y_ > height_) {
 960                         // The cursor is off-screen so recenter before proceeding.
 961                         center();
 962                         updateMetrics(false);
 963                         //FIXME: updateMetrics() does not update paragraph position
 964                         // This is done at draw() time. So we need a redraw!
 965                         buffer_.changed();
 966                         p = bv_funcs::getPos(*this, cur, cur.boundary());
 967                 }
 968                 scroll(cmd.action == LFUN_SCREEN_UP? - height_ : height_);
 969                 cur.reset(buffer_.inset());
 970                 text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_);
 971                 //FIXME: what to do with cur.x_target()?
 972                 finishUndo();
 973                 // The metrics are already up to date. see scroll()
 974                 updateFlags = Update::None;
 975                 break;
 976         }
 977
 978         case LFUN_SCREEN_UP_SELECT:
 979         case LFUN_SCREEN_DOWN_SELECT: {
 980                 cur.selHandle(true);
 981                 size_t initial_depth = cur.depth();
 982                 Point const p = bv_funcs::getPos(*this, cur, cur.boundary());
 983                 scroll(cmd.action == LFUN_SCREEN_UP_SELECT? - height_ : height_);
 984                 // FIXME: We need to verify if the cursor stayed within an inset...
 985                 //cur.reset(buffer_.inset());
 986                 text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_);
 987                 finishUndo();
 988                 while (cur.depth() > initial_depth) {
 989                         cur.forwardInset();
 990                 }
 991                 // FIXME: we need to do a redraw again because of the selection
 992                 buffer_.changed();
 993                 updateFlags = Update::Force | Update::FitCursor;
 994                 break;
 995         }
 996
 997         default:
 998                 updateFlags = Update::None;
 999         }
1000
1001         return updateFlags;
1002 }
1003
1004
1005 docstring const BufferView::requestSelection()
1006 {
1007         Cursor & cur = cursor_;
1008
1009         if (!cur.selection()) {
1010                 xsel_cache_.set = false;
1011                 return docstring();
1012         }
1013
1014         if (!xsel_cache_.set ||
1015             cur.top() != xsel_cache_.cursor ||
1016             cur.anchor_.top() != xsel_cache_.anchor)
1017         {
1018                 xsel_cache_.cursor = cur.top();
1019                 xsel_cache_.anchor = cur.anchor_.top();
1020                 xsel_cache_.set = cur.selection();
1021                 return cur.selectionAsString(false);
1022         }
1023         return docstring();
1024 }
1025
1026
1027 void BufferView::clearSelection()
1028 {
1029         cursor_.clearSelection();
1030         // Clear the selection buffer. Otherwise a subsequent
1031         // middle-mouse-button paste would use the selection buffer,
1032         // not the more current external selection.
1033         cap::clearSelection();
1034         xsel_cache_.set = false;
1035         // The buffer did not really change, but this causes the
1036         // redraw we need because we cleared the selection above.
1037         buffer_.changed();
1038 }
1039
1040
1041 void BufferView::resize(int width, int height)
1042 {
1043         // Update from work area
1044         width_ = width;
1045         height_ = height;
1046
1047         updateMetrics(false);
1048 }
1049
1050
1051 Inset const * BufferView::getCoveringInset(Text const & text, int x, int y)
1052 {
1053         TextMetrics & tm = text_metrics_[&text];
1054         Inset * inset = tm.checkInsetHit(x, y);
1055         if (!inset)
1056                 return 0;
1057
1058         if (!inset->descendable())
1059                 // No need to go further down if the inset is not
1060                 // descendable.
1061                 return inset;
1062
1063         size_t cell_number = inset->nargs();
1064         // Check all the inner cell.
1065         for (size_t i = 0; i != cell_number; ++i) {
1066                 Text const * inner_text = inset->getText(i);
1067                 if (inner_text) {
1068                         // Try deeper.
1069                         Inset const * inset_deeper =
1070                                 getCoveringInset(*inner_text, x, y);
1071                         if (inset_deeper)
1072                                 return inset_deeper;
1073                 }
1074         }
1075
1076         return inset;
1077 }
1078
1079
1080 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
1081 {
1082         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1083
1084         // This is only called for mouse related events including
1085         // LFUN_FILE_OPEN generated by drag-and-drop.
1086         FuncRequest cmd = cmd0;
1087
1088         Cursor cur(*this);
1089         cur.push(buffer_.inset());
1090         cur.selection() = cursor_.selection();
1091
1092         // Either the inset under the cursor or the
1093         // surrounding Text will handle this event.
1094
1095         // make sure we stay within the screen...
1096         cmd.y = min(max(cmd.y, -1), height_);
1097
1098         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1099
1100                 // Get inset under mouse, if there is one.
1101                 Inset const * covering_inset =
1102                         getCoveringInset(buffer_.text(), cmd.x, cmd.y);
1103                 if (covering_inset == last_inset_)
1104                         // Same inset, no need to do anything...
1105                         return false;
1106
1107                 bool need_redraw = false;
1108                 // const_cast because of setMouseHover().
1109                 Inset * inset = const_cast<Inset *>(covering_inset);
1110                 if (last_inset_)
1111                         // Remove the hint on the last hovered inset (if any).
1112                         need_redraw |= last_inset_->setMouseHover(false);
1113                 if (inset)
1114                         // Highlighted the newly hovered inset (if any).
1115                         need_redraw |= inset->setMouseHover(true);
1116                 last_inset_ = inset;
1117                 if (!need_redraw)
1118                         return false;
1119
1120                 // if last metrics update was in singlepar mode, WorkArea::redraw() will
1121                 // not expose the button for redraw. We adjust here the metrics dimension
1122                 // to enable a full redraw in any case as this is not costly.
1123                 TextMetrics & tm = text_metrics_[&buffer_.text()];
1124                 std::pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
1125                 std::pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
1126                 int y1 = firstpm.second->position() - firstpm.second->ascent();
1127                 int y2 = lastpm.second->position() + lastpm.second->descent();
1128                 metrics_info_ = ViewMetricsInfo(firstpm.first, lastpm.first, y1, y2,
1129                         FullScreenUpdate, buffer_.text().paragraphs().size());
1130                 // Reinitialize anchor to first pit.
1131                 anchor_ref_ = firstpm.first;
1132                 offset_ref_ = -y1;
1133                 LYXERR(Debug::PAINTING)
1134                         << "Mouse hover detected at: (" << cmd.x << ", " << cmd.y << ")"
1135                         << "\nTriggering redraw: y1: " << y1 << " y2: " << y2
1136                         << " pit1: " << firstpm.first << " pit2: " << lastpm.first << endl;
1137
1138                 // This event (moving without mouse click) is not passed further.
1139                 // This should be changed if it is further utilized.
1140                 return true;
1141         }
1142
1143         // Build temporary cursor.
1144         Inset * inset = text_metrics_[&buffer_.text()].editXY(cur, cmd.x, cmd.y);
1145
1146         // Put anchor at the same position.
1147         cur.resetAnchor();
1148
1149         // Try to dispatch to an non-editable inset near this position
1150         // via the temp cursor. If the inset wishes to change the real
1151         // cursor it has to do so explicitly by using
1152         //  cur.bv().cursor() = cur;  (or similar)
1153         if (inset) {
1154                 inset->dispatch(cur, cmd);
1155         }
1156
1157         // Now dispatch to the temporary cursor. If the real cursor should
1158         // be modified, the inset's dispatch has to do so explicitly.
1159         if (!cur.result().dispatched())
1160                 cur.dispatch(cmd);
1161
1162         //Do we have a selection?
1163         theSelection().haveSelection(cursor().selection());
1164
1165         // Redraw if requested and necessary.
1166         if (cur.result().dispatched() && cur.result().update())
1167                 return update(cur.result().update());
1168
1169         return false;
1170 }
1171
1172
1173 void BufferView::scroll(int y)
1174 {
1175         if (y > 0)
1176                 scrollDown(y);
1177         else if (y < 0)
1178                 scrollUp(-y);
1179 }
1180
1181
1182 void BufferView::scrollDown(int offset)
1183 {
1184         Text * text = &buffer_.text();
1185         TextMetrics & tm = text_metrics_[text];
1186         int ymax = height_ + offset;
1187         while (true) {
1188                 std::pair<pit_type, ParagraphMetrics const *> last = tm.last();
1189                 int bottom_pos = last.second->position() + last.second->descent();
1190                 if (last.first == text->paragraphs().size() - 1) {
1191                         if (bottom_pos <= height_)
1192                                 return;
1193                         offset = min(offset, bottom_pos - height_);
1194                         break;
1195                 }
1196                 if (bottom_pos > ymax)
1197                         break;
1198                 tm.newParMetricsDown();
1199         }
1200         offset_ref_ += offset;
1201         updateMetrics(false);
1202         buffer_.changed();
1203 }
1204
1205
1206 void BufferView::scrollUp(int offset)
1207 {
1208         Text * text = &buffer_.text();
1209         TextMetrics & tm = text_metrics_[text];
1210         int ymin = - offset;
1211         while (true) {
1212                 std::pair<pit_type, ParagraphMetrics const *> first = tm.first();
1213                 int top_pos = first.second->position() - first.second->ascent();
1214                 if (first.first == 0) {
1215                         if (top_pos >= 0)
1216                                 return;
1217                         offset = min(offset, - top_pos);
1218                         break;
1219                 }
1220                 if (top_pos < ymin)
1221                         break;
1222                 tm.newParMetricsUp();
1223         }
1224         offset_ref_ -= offset;
1225         updateMetrics(false);
1226         buffer_.changed();
1227 }
1228
1229
1230 void BufferView::setCursorFromRow(int row)
1231 {
1232         int tmpid = -1;
1233         int tmppos = -1;
1234
1235         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
1236
1237         cursor_.reset(buffer_.inset());
1238         if (tmpid == -1)
1239                 buffer_.text().setCursor(cursor_, 0, 0);
1240         else
1241                 buffer_.text().setCursor(cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
1242 }
1243
1244
1245 void BufferView::gotoLabel(docstring const & label)
1246 {
1247         for (InsetIterator it = inset_iterator_begin(buffer_.inset()); it; ++it) {
1248                 vector<docstring> labels;
1249                 it->getLabelList(buffer_, labels);
1250                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1251                         setCursor(it);
1252                         update();
1253                         return;
1254                 }
1255         }
1256 }
1257
1258
1259 TextMetrics const & BufferView::textMetrics(Text const * t) const
1260 {
1261         return const_cast<BufferView *>(this)->textMetrics(t);
1262 }
1263
1264
1265 TextMetrics & BufferView::textMetrics(Text const * t)
1266 {
1267         TextMetricsCache::iterator tmc_it  = text_metrics_.find(t);
1268         if (tmc_it == text_metrics_.end()) {
1269                 tmc_it = text_metrics_.insert(
1270                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
1271         }
1272         return tmc_it->second;
1273 }
1274
1275
1276 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
1277                 pit_type pit) const
1278 {
1279         return textMetrics(t).parMetrics(pit);
1280 }
1281
1282
1283 int BufferView::workHeight() const
1284 {
1285         return height_;
1286 }
1287
1288
1289 void BufferView::setCursor(DocIterator const & dit)
1290 {
1291         size_t const n = dit.depth();
1292         for (size_t i = 0; i < n; ++i)
1293                 dit[i].inset().edit(cursor_, true);
1294
1295         cursor_.setCursor(dit);
1296         cursor_.selection() = false;
1297 }
1298
1299
1300 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
1301 {
1302         // Would be wrong to delete anything if we have a selection.
1303         if (cur.selection())
1304                 return false;
1305
1306         bool need_anchor_change = false;
1307         bool changed = cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1308                 need_anchor_change);
1309
1310         if (need_anchor_change)
1311                 cur.resetAnchor();
1312
1313         if (!changed)
1314                 return false;
1315
1316         updateLabels(buffer_);
1317
1318         updateMetrics(false);
1319         buffer_.changed();
1320         return true;
1321 }
1322
1323
1324 bool BufferView::mouseSetCursor(Cursor & cur)
1325 {
1326         BOOST_ASSERT(&cur.bv() == this);
1327
1328         // this event will clear selection so we save selection for
1329         // persistent selection
1330         cap::saveSelection(cursor());
1331
1332         // Has the cursor just left the inset?
1333         bool badcursor = false;
1334         bool leftinset = (&cursor_.inset() != &cur.inset());
1335         if (leftinset)
1336                 badcursor = notifyCursorLeaves(cursor_, cur);
1337
1338         // do the dEPM magic if needed
1339         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
1340         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
1341         // the leftinset bool would not be necessary (badcursor instead).
1342         bool update = leftinset;
1343         if (!badcursor && cursor_.inTexted())
1344                 update |= checkDepm(cur, cursor_);
1345
1346         // if the cursor was in an empty script inset and the new
1347         // position is in the nucleus of the inset, notifyCursorLeaves
1348         // will kill the script inset itself. So we check all the
1349         // elements of the cursor to make sure that they are correct.
1350         // For an example, see bug 2933:
1351         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1352         // The code below could maybe be moved to a DocIterator method.
1353         //lyxerr << "cur before " << cur <<std::endl;
1354         DocIterator dit(cur.inset());
1355         dit.push_back(cur.bottom());
1356         size_t i = 1;
1357         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1358                 dit.push_back(cur[i]);
1359                 ++i;
1360         }
1361         //lyxerr << "5 cur after" << dit <<std::endl;
1362
1363         cursor_.setCursor(dit);
1364         cursor_.boundary(cur.boundary());
1365         cursor_.clearSelection();
1366         finishUndo();
1367         return update;
1368 }
1369
1370
1371 void BufferView::putSelectionAt(DocIterator const & cur,
1372                                 int length, bool backwards)
1373 {
1374         cursor_.clearSelection();
1375
1376         setCursor(cur);
1377
1378         if (length) {
1379                 if (backwards) {
1380                         cursor_.pos() += length;
1381                         cursor_.setSelection(cursor_, -length);
1382                 } else
1383                         cursor_.setSelection(cursor_, length);
1384         }
1385 }
1386
1387
1388 Cursor & BufferView::cursor()
1389 {
1390         return cursor_;
1391 }
1392
1393
1394 Cursor const & BufferView::cursor() const
1395 {
1396         return cursor_;
1397 }
1398
1399
1400 pit_type BufferView::anchor_ref() const
1401 {
1402         return anchor_ref_;
1403 }
1404
1405
1406 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1407 {
1408         return metrics_info_;
1409 }
1410
1411
1412 // FIXME: We should split-up updateMetrics() for the singlepar case.
1413 void BufferView::updateMetrics(bool singlepar)
1414 {
1415         Text & buftext = buffer_.text();
1416         pit_type const npit = int(buftext.paragraphs().size());
1417
1418         if (anchor_ref_ > int(npit - 1)) {
1419                 anchor_ref_ = int(npit - 1);
1420                 offset_ref_ = 0;
1421         }
1422
1423         if (!singlepar) {
1424                 // Clear out the position cache in case of full screen redraw,
1425                 coord_cache_.clear();
1426
1427                 // Clear out paragraph metrics to avoid having invalid metrics
1428                 // in the cache from paragraphs not relayouted below
1429                 // The complete text metrics will be redone.
1430                 text_metrics_.clear();
1431         }
1432
1433         TextMetrics & tm = textMetrics(&buftext);
1434
1435         pit_type const bottom_pit = cursor_.bottom().pit();
1436         // If the paragraph metrics has changed, we can not
1437         // use the singlepar optimisation.
1438         if (singlepar
1439                 // In Single Paragraph mode, rebreak only
1440                 // the (main text, not inset!) paragraph containing the cursor.
1441                 // (if this paragraph contains insets etc., rebreaking will
1442                 // recursively descend)
1443                 && !tm.redoParagraph(bottom_pit)) {
1444
1445                 updateOffsetRef();
1446                 // collect cursor paragraph iter bounds
1447                 ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
1448                 int y1 = pm.position() - pm.ascent();
1449                 int y2 = pm.position() + pm.descent();
1450                 metrics_info_ = ViewMetricsInfo(bottom_pit, bottom_pit, y1, y2,
1451                         SingleParUpdate, npit);
1452                 LYXERR(Debug::PAINTING)
1453                         << BOOST_CURRENT_FUNCTION
1454                         << "\ny1: " << y1
1455                         << " y2: " << y2
1456                         << " pit: " << bottom_pit
1457                         << " singlepar: " << singlepar
1458                         << endl;
1459                 return;
1460         }
1461
1462         pit_type const pit = anchor_ref_;
1463         int pit1 = pit;
1464         int pit2 = pit;
1465
1466         // Rebreak anchor paragraph.
1467         tm.redoParagraph(pit);
1468
1469         updateOffsetRef();
1470
1471         int y0 = tm.parMetrics(pit).ascent() - offset_ref_;
1472
1473         // Redo paragraphs above anchor if necessary.
1474         int y1 = y0;
1475         while (y1 > 0 && pit1 > 0) {
1476                 y1 -= tm.parMetrics(pit1).ascent();
1477                 --pit1;
1478                 tm.redoParagraph(pit1);
1479                 y1 -= tm.parMetrics(pit1).descent();
1480         }
1481
1482         // Take care of ascent of first line
1483         y1 -= tm.parMetrics(pit1).ascent();
1484
1485         // Normalize anchor for next time
1486         anchor_ref_ = pit1;
1487         offset_ref_ = -y1;
1488
1489         // Grey at the beginning is ugly
1490         if (pit1 == 0 && y1 > 0) {
1491                 y0 -= y1;
1492                 y1 = 0;
1493                 anchor_ref_ = 0;
1494         }
1495
1496         // Redo paragraphs below the anchor if necessary.
1497         int y2 = y0;
1498         while (y2 < height_ && pit2 < int(npit) - 1) {
1499                 y2 += tm.parMetrics(pit2).descent();
1500                 ++pit2;
1501                 tm.redoParagraph(pit2);
1502                 y2 += tm.parMetrics(pit2).ascent();
1503         }
1504
1505         // Take care of descent of last line
1506         y2 += tm.parMetrics(pit2).descent();
1507
1508         LYXERR(Debug::PAINTING)
1509                 << BOOST_CURRENT_FUNCTION
1510                 << "\n y1: " << y1
1511                 << " y2: " << y2
1512                 << " pit1: " << pit1
1513                 << " pit2: " << pit2
1514                 << " npit: " << npit
1515                 << " singlepar: " << singlepar
1516                 << endl;
1517
1518         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2,
1519                 FullScreenUpdate, npit);
1520
1521         if (lyxerr.debugging(Debug::WORKAREA)) {
1522                 LYXERR(Debug::WORKAREA) << "BufferView::updateMetrics" << endl;
1523                 coord_cache_.dump();
1524         }
1525 }
1526
1527
1528 void BufferView::menuInsertLyXFile(string const & filenm)
1529 {
1530         BOOST_ASSERT(cursor_.inTexted());
1531         string filename = filenm;
1532
1533         if (filename.empty()) {
1534                 // Launch a file browser
1535                 // FIXME UNICODE
1536                 string initpath = lyxrc.document_path;
1537                 string const trypath = buffer_.filePath();
1538                 // If directory is writeable, use this as default.
1539                 if (isDirWriteable(FileName(trypath)))
1540                         initpath = trypath;
1541
1542                 // FIXME UNICODE
1543                 FileDialog fileDlg(_("Select LyX document to insert"),
1544                         LFUN_FILE_INSERT,
1545                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1546                         make_pair(_("Examples|#E#e"),
1547                                     from_utf8(addPath(package().system_support().absFilename(),
1548                                     "examples"))));
1549
1550                 FileDialog::Result result =
1551                         fileDlg.open(from_utf8(initpath),
1552                                      FileFilterList(_("LyX Documents (*.lyx)")),
1553                                      docstring());
1554
1555                 if (result.first == FileDialog::Later)
1556                         return;
1557
1558                 // FIXME UNICODE
1559                 filename = to_utf8(result.second);
1560
1561                 // check selected filename
1562                 if (filename.empty()) {
1563                         // emit message signal.
1564                         message(_("Canceled."));
1565                         return;
1566                 }
1567         }
1568
1569         // Get absolute path of file and add ".lyx"
1570         // to the filename if necessary
1571         filename = fileSearch(string(), filename, "lyx").absFilename();
1572
1573         docstring const disp_fn = makeDisplayPath(filename);
1574         // emit message signal.
1575         message(bformat(_("Inserting document %1$s..."), disp_fn));
1576
1577         docstring res;
1578         Buffer buf("", false);
1579         if (lyx::loadLyXFile(&buf, FileName(filename))) {
1580                 ErrorList & el = buffer_.errorList("Parse");
1581                 // Copy the inserted document error list into the current buffer one.
1582                 el = buf.errorList("Parse");
1583                 recordUndo(cursor_);
1584                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1585                                              buf.params().getTextClassPtr(), el);
1586                 res = _("Document %1$s inserted.");
1587         } else
1588                 res = _("Could not insert document %1$s");
1589
1590         // emit message signal.
1591         message(bformat(res, disp_fn));
1592         buffer_.errors("Parse");
1593         updateMetrics(false);
1594 }
1595
1596
1597 void BufferView::draw(frontend::Painter & pain)
1598 {
1599         PainterInfo pi(this, pain);
1600         // Should the whole screen, including insets, be refreshed?
1601         // FIXME: We should also distinguish DecorationUpdate to avoid text
1602         // drawing if possible. This is not possible to do easily right now
1603         // because of the single backing pixmap.
1604         pi.full_repaint = metrics_info_.update_strategy != SingleParUpdate;
1605
1606         if (pi.full_repaint)
1607                 // Clear background (if not delegated to rows)
1608                 pain.fillRectangle(0, metrics_info_.y1, width_,
1609                         metrics_info_.y2 - metrics_info_.y1,
1610                         buffer_.inset().backgroundColor());
1611
1612         LYXERR(Debug::PAINTING) << "\t\t*** START DRAWING ***" << endl;
1613         Text & text = buffer_.text();
1614         TextMetrics const & tm = text_metrics_[&text];
1615         int y = metrics_info_.y1 + tm.parMetrics(metrics_info_.p1).ascent();
1616         if (!pi.full_repaint)
1617                 tm.drawParagraph(pi, metrics_info_.p1, 0, y);
1618         else
1619                 tm.draw(pi, 0, y);
1620         LYXERR(Debug::PAINTING) << "\n\t\t*** END DRAWING  ***" << endl;
1621
1622         // and grey out above (should not happen later)
1623 //      lyxerr << "par ascent: " << text.getPar(metrics_info_.p1).ascent() << endl;
1624         if (metrics_info_.y1 > 0
1625                 && metrics_info_.update_strategy == FullScreenUpdate)
1626                 pain.fillRectangle(0, 0, width_, metrics_info_.y1, Color::bottomarea);
1627
1628         // and possibly grey out below
1629 //      lyxerr << "par descent: " << text.getPar(metrics_info_.p1).ascent() << endl;
1630         if (metrics_info_.y2 < height_
1631                 && metrics_info_.update_strategy == FullScreenUpdate)
1632                 pain.fillRectangle(0, metrics_info_.y2, width_,
1633                         height_ - metrics_info_.y2, Color::bottomarea);
1634 }
1635
1636 } // namespace lyx