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 "rowpainter.h"
  50 #include "Session.h"
  51 #include "TexRow.h"
  52 #include "Text.h"
  53 #include "TextClass.h"
  54 #include "toc.h"
  55 #include "Undo.h"
  56 #include "VSpace.h"
  57 #include "WordLangTuple.h"
  58
  59 #include "insets/InsetBibtex.h"
  60 #include "insets/InsetCommand.h" // ChangeRefs
  61 #include "insets/InsetRef.h"
  62 #include "insets/InsetText.h"
  63
  64 #include "frontends/alert.h"
  65 #include "frontends/FileDialog.h"
  66 #include "frontends/FontMetrics.h"
  67 #include "frontends/Painter.h"
  68 #include "frontends/Selection.h"
  69
  70 #include "graphics/Previews.h"
  71
  72 #include "support/convert.h"
  73 #include "support/FileFilterList.h"
  74 #include "support/filetools.h"
  75 #include "support/Package.h"
  76 #include "support/types.h"
  77
  78 #include <boost/bind.hpp>
  79 #include <boost/current_function.hpp>
  80
  81 #include <functional>
  82 #include <vector>
  83
  84 using std::distance;
  85 using std::endl;
  86 using std::istringstream;
  87 using std::make_pair;
  88 using std::min;
  89 using std::max;
  90 using std::mem_fun_ref;
  91 using std::string;
  92 using std::vector;
  93
  94
  95 namespace lyx {
  96
  97 using support::addPath;
  98 using support::bformat;
  99 using support::FileFilterList;
 100 using support::FileName;
 101 using support::fileSearch;
 102 using support::isDirWriteable;
 103 using support::isFileReadable;
 104 using support::makeDisplayPath;
 105 using support::package;
 106
 107 namespace Alert = frontend::Alert;
 108
 109 namespace {
 110
 111 /// Return an inset of this class if it exists at the current cursor position
 112 template <class T>
 113 T * getInsetByCode(Cursor & cur, Inset::Code code)
 114 {
 115         T * inset = 0;
 116         DocIterator it = cur;
 117         if (it.nextInset() &&
 118             it.nextInset()->lyxCode() == code) {
 119                 inset = static_cast<T*>(it.nextInset());
 120         }
 121         return inset;
 122 }
 123
 124 } // anon namespace
 125
 126
 127 BufferView::BufferView(Buffer & buf)
 128         : width_(0), height_(0), buffer_(buf), wh_(0),
 129           cursor_(*this),
 130           multiparsel_cache_(false), anchor_ref_(0), offset_ref_(0),
 131           need_centering_(false), intl_(new Intl), last_inset_(0)
 132 {
 133         xsel_cache_.set = false;
 134         intl_->initKeyMapper(lyxrc.use_kbmap);
 135
 136         cursor_.push(buffer_.inset());
 137         cursor_.resetAnchor();
 138         buffer_.text().setCurrentFont(cursor_);
 139
 140         if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 141                 graphics::Previews::get().generateBufferPreviews(buffer_);
 142 }
 143
 144
 145 BufferView::~BufferView()
 146 {
 147         // current buffer is going to be switched-off, save cursor pos
 148         // Ideally, the whole cursor stack should be saved, but session
 149         // currently can only handle bottom (whole document) level pit and pos.
 150         // That is to say, if a cursor is in a nested inset, it will be
 151         // restore to the left of the top level inset.
 152         LyX::ref().session().lastFilePos().save(
 153                 support::FileName(buffer_.fileName()),
 154                 boost::tie(cursor_.bottom().pit(), cursor_.bottom().pos()) );
 155 }
 156
 157
 158 Buffer & BufferView::buffer()
 159 {
 160         return buffer_;
 161 }
 162
 163
 164 Buffer const & BufferView::buffer() const
 165 {
 166         return buffer_;
 167 }
 168
 169
 170 bool BufferView::fitCursor()
 171 {
 172         if (bv_funcs::status(this, cursor_) == bv_funcs::CUR_INSIDE) {
 173                 frontend::FontMetrics const & fm =
 174                         theFontMetrics(cursor_.getFont());
 175                 int const asc = fm.maxAscent();
 176                 int const des = fm.maxDescent();
 177                 Point const p = bv_funcs::getPos(*this, cursor_, cursor_.boundary());
 178                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 179                         return false;
 180         }
 181         center();
 182         return true;
 183 }
 184
 185
 186 bool BufferView::multiParSel()
 187 {
 188         if (!cursor_.selection())
 189                 return false;
 190         bool ret = multiparsel_cache_;
 191         multiparsel_cache_ = cursor_.selBegin().pit() != cursor_.selEnd().pit();
 192         // Either this, or previous selection spans paragraphs
 193         return ret || multiparsel_cache_;
 194 }
 195
 196
 197 bool BufferView::update(Update::flags flags)
 198 {
 199         // last_inset_ points to the last visited inset. This pointer may become
 200         // invalid because of keyboard editing. Since all such operations
 201         // causes screen update(), I reset last_inset_ to avoid such a problem.
 202         last_inset_ = 0;
 203         // This is close to a hot-path.
 204         LYXERR(Debug::DEBUG)
 205                 << BOOST_CURRENT_FUNCTION
 206                 << "[fitcursor = " << (flags & Update::FitCursor)
 207                 << ", forceupdate = " << (flags & Update::Force)
 208                 << ", singlepar = " << (flags & Update::SinglePar)
 209                 << "]  buffer: " << &buffer_ << endl;
 210
 211         // Update macro store
 212         if (!(cursor().inMathed() && cursor().inMacroMode()))
 213                 buffer_.buildMacros();
 214
 215         // Now do the first drawing step if needed. This consists on updating
 216         // the CoordCache in updateMetrics().
 217         // The second drawing step is done in WorkArea::redraw() if needed.
 218
 219         // Case when no explicit update is requested.
 220         if (!flags) {
 221                 // no need to redraw anything.
 222                 metrics_info_.update_strategy = NoScreenUpdate;
 223                 return false;
 224         }
 225
 226         if (flags == Update::Decoration) {
 227                 metrics_info_.update_strategy = DecorationUpdate;
 228                 return true;
 229         }
 230
 231         if (flags == Update::FitCursor
 232                 || flags == (Update::Decoration | Update::FitCursor)) {
 233                 bool const fit_cursor = fitCursor();
 234                 // tell the frontend to update the screen if needed.
 235                 if (fit_cursor) {
 236                         updateMetrics(false);
 237                         return true;
 238                 }
 239                 if (flags & Update::Decoration) {
 240                         metrics_info_.update_strategy = DecorationUpdate;
 241                         return true;
 242                 }
 243                 // no screen update is needed.
 244                 metrics_info_.update_strategy = NoScreenUpdate;
 245                 return false;
 246         }
 247
 248         bool full_metrics = flags & Update::Force;
 249         if (flags & Update::MultiParSel)
 250                 full_metrics |= multiParSel();
 251
 252         bool const single_par = !full_metrics;
 253         updateMetrics(single_par);
 254
 255         if (flags & Update::FitCursor && fitCursor())
 256                 updateMetrics(false);
 257
 258         // tell the frontend to update the screen.
 259         return true;
 260 }
 261
 262
 263 void BufferView::updateScrollbar()
 264 {
 265         Text & t = buffer_.text();
 266         TextMetrics & tm = text_metrics_[&t];
 267
 268         int const parsize = int(t.paragraphs().size() - 1);
 269         if (anchor_ref_ >  parsize)  {
 270                 anchor_ref_ = parsize;
 271                 offset_ref_ = 0;
 272         }
 273
 274         LYXERR(Debug::GUI)
 275                 << BOOST_CURRENT_FUNCTION
 276                 << " Updating scrollbar: height: " << t.paragraphs().size()
 277                 << " curr par: " << cursor_.bottom().pit()
 278                 << " default height " << defaultRowHeight() << endl;
 279
 280         // It would be better to fix the scrollbar to understand
 281         // values in [0..1] and divide everything by wh
 282
 283         // estimated average paragraph height:
 284         if (wh_ == 0)
 285                 wh_ = height_ / 4;
 286
 287         int h = tm.parMetrics(anchor_ref_).height();
 288
 289         // Normalize anchor/offset (MV):
 290         while (offset_ref_ > h && anchor_ref_ < parsize) {
 291                 anchor_ref_++;
 292                 offset_ref_ -= h;
 293                 h = tm.parMetrics(anchor_ref_).height();
 294         }
 295         // Look at paragraph heights on-screen
 296         int sumh = 0;
 297         int nh = 0;
 298         for (pit_type pit = anchor_ref_; pit <= parsize; ++pit) {
 299                 if (sumh > height_)
 300                         break;
 301                 int const h2 = tm.parMetrics(pit).height();
 302                 sumh += h2;
 303                 nh++;
 304         }
 305
 306         BOOST_ASSERT(nh);
 307         int const hav = sumh / nh;
 308         // More realistic average paragraph height
 309         if (hav > wh_)
 310                 wh_ = hav;
 311
 312         BOOST_ASSERT(h);
 313         scrollbarParameters_.height = (parsize + 1) * wh_;
 314         scrollbarParameters_.position = anchor_ref_ * wh_ + int(offset_ref_ * wh_ / float(h));
 315         scrollbarParameters_.lineScrollHeight = int(wh_ * defaultRowHeight() / float(h));
 316 }
 317
 318
 319 ScrollbarParameters const & BufferView::scrollbarParameters() const
 320 {
 321         return scrollbarParameters_;
 322 }
 323
 324
 325 void BufferView::scrollDocView(int value)
 326 {
 327         LYXERR(Debug::GUI) << BOOST_CURRENT_FUNCTION
 328                            << "[ value = " << value << "]" << endl;
 329
 330         Text & t = buffer_.text();
 331         TextMetrics & tm = text_metrics_[&t];
 332
 333         float const bar = value / float(wh_ * t.paragraphs().size());
 334
 335         anchor_ref_ = int(bar * t.paragraphs().size());
 336         if (anchor_ref_ >  int(t.paragraphs().size()) - 1)
 337                 anchor_ref_ = int(t.paragraphs().size()) - 1;
 338
 339         tm.redoParagraph(anchor_ref_);
 340         int const h = tm.parMetrics(anchor_ref_).height();
 341         offset_ref_ = int((bar * t.paragraphs().size() - anchor_ref_) * h);
 342         updateMetrics(false);
 343 }
 344
 345
 346 void BufferView::setCursorFromScrollbar()
 347 {
 348         Text & t = buffer_.text();
 349
 350         int const height = 2 * defaultRowHeight();
 351         int const first = height;
 352         int const last = height_ - height;
 353         Cursor & cur = cursor_;
 354
 355         bv_funcs::CurStatus st = bv_funcs::status(this, cur);
 356
 357         switch (st) {
 358         case bv_funcs::CUR_ABOVE:
 359                 // We reset the cursor because bv_funcs::status() does not
 360                 // work when the cursor is within mathed.
 361                 cur.reset(buffer_.inset());
 362                 t.setCursorFromCoordinates(cur, 0, first);
 363                 cur.clearSelection();
 364                 break;
 365         case bv_funcs::CUR_BELOW:
 366                 // We reset the cursor because bv_funcs::status() does not
 367                 // work when the cursor is within mathed.
 368                 cur.reset(buffer_.inset());
 369                 t.setCursorFromCoordinates(cur, 0, last);
 370                 cur.clearSelection();
 371                 break;
 372         case bv_funcs::CUR_INSIDE:
 373                 int const y = bv_funcs::getPos(*this, cur, cur.boundary()).y_;
 374                 int const newy = min(last, max(y, first));
 375                 if (y != newy) {
 376                         cur.reset(buffer_.inset());
 377                         t.setCursorFromCoordinates(cur, 0, newy);
 378                 }
 379         }
 380 }
 381
 382
 383 Change const BufferView::getCurrentChange() const
 384 {
 385         if (!cursor_.selection())
 386                 return Change(Change::UNCHANGED);
 387
 388         DocIterator dit = cursor_.selectionBegin();
 389         return dit.paragraph().lookupChange(dit.pos());
 390 }
 391
 392
 393 void BufferView::saveBookmark(unsigned int idx)
 394 {
 395         // tenatively save bookmark, id and pos will be used to
 396         // acturately locate a bookmark in a 'live' lyx session.
 397         // pit and pos will be updated with bottom level pit/pos
 398         // when lyx exits.
 399         LyX::ref().session().bookmarks().save(
 400                 FileName(buffer_.fileName()),
 401                 cursor_.bottom().pit(),
 402                 cursor_.bottom().pos(),
 403                 cursor_.paragraph().id(),
 404                 cursor_.pos(),
 405                 idx
 406         );
 407         if (idx)
 408                 // emit message signal.
 409                 message(_("Save bookmark"));
 410 }
 411
 412
 413 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 414         int top_id, pos_type top_pos)
 415 {
 416         bool success = false;
 417         DocIterator doc_it;
 418
 419         cursor_.clearSelection();
 420
 421         // if a valid par_id is given, try it first
 422         // This is the case for a 'live' bookmark when unique paragraph ID
 423         // is used to track bookmarks.
 424         if (top_id > 0) {
 425                 ParIterator par = buffer_.getParFromID(top_id);
 426                 if (par != buffer_.par_iterator_end()) {
 427                         doc_it = makeDocIterator(par, min(par->size(), top_pos));
 428                         // Some slices of the iterator may not be
 429                         // reachable (e.g. closed collapsable inset)
 430                         // so the dociterator may need to be
 431                         // shortened. Otherwise, setCursor may crash
 432                         // lyx when the cursor can not be set to these
 433                         // insets.
 434                         size_t const n = doc_it.depth();
 435                         for (size_t i = 0; i < n; ++i)
 436                                 if (doc_it[i].inset().editable() != Inset::HIGHLY_EDITABLE) {
 437                                         doc_it.resize(i);
 438                                         break;
 439                                 }
 440                         success = true;
 441                 }
 442         }
 443
 444         // if top_id == 0, or searching through top_id failed
 445         // This is the case for a 'restored' bookmark when only bottom
 446         // (document level) pit was saved. Because of this, bookmark
 447         // restoration is inaccurate. If a bookmark was within an inset,
 448         // it will be restored to the left of the outmost inset that contains
 449         // the bookmark.
 450         if (static_cast<size_t>(bottom_pit) < buffer_.paragraphs().size()) {
 451                 doc_it = doc_iterator_begin(buffer_.inset());
 452                 doc_it.pit() = bottom_pit;
 453                 doc_it.pos() = min(bottom_pos, doc_it.paragraph().size());
 454                 success = true;
 455         }
 456
 457         if (success) {
 458                 // Note: only bottom (document) level pit is set.
 459                 setCursor(doc_it);
 460                 // set the current font.
 461                 buffer_.text().setCurrentFont(cursor_);
 462                 // center the screen on this new position.
 463                 center();
 464         }
 465
 466         return success;
 467 }
 468
 469
 470 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 471 {
 472         if (lyxrc.rtl_support) {
 473                 if (cursor_.innerText()->real_current_font.isRightToLeft()) {
 474                         if (intl_->keymap == Intl::PRIMARY)
 475                                 intl_->keyMapSec();
 476                 } else {
 477                         if (intl_->keymap == Intl::SECONDARY)
 478                                 intl_->keyMapPrim();
 479                 }
 480         }
 481
 482         intl_->getTransManager().translateAndInsert(c, t, cur);
 483 }
 484
 485
 486 int BufferView::workWidth() const
 487 {
 488         return width_;
 489 }
 490
 491
 492 void BufferView::updateOffsetRef()
 493 {
 494         // No need to update offset_ref_ in this case.
 495         if (!need_centering_)
 496                 return;
 497
 498         // We are not properly started yet, delay until resizing is
 499         // done.
 500         if (height_ == 0)
 501                 return;
 502
 503         CursorSlice & bot = cursor_.bottom();
 504         TextMetrics & tm = text_metrics_[bot.text()];
 505         ParagraphMetrics const & pm = tm.parMetrics(bot.pit());
 506         Point p = bv_funcs::coordOffset(*this, cursor_, cursor_.boundary());
 507         offset_ref_ = p.y_ + pm.ascent() - height_ / 2;
 508
 509         need_centering_ = false;
 510 }
 511
 512
 513 void BufferView::center()
 514 {
 515         anchor_ref_ = cursor_.bottom().pit();
 516         need_centering_ = true;
 517 }
 518
 519
 520 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 521 {
 522         FuncStatus flag;
 523
 524         Cursor & cur = cursor_;
 525
 526         switch (cmd.action) {
 527
 528         case LFUN_UNDO:
 529                 flag.enabled(!buffer_.undostack().empty());
 530                 break;
 531         case LFUN_REDO:
 532                 flag.enabled(!buffer_.redostack().empty());
 533                 break;
 534         case LFUN_FILE_INSERT:
 535         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 536         case LFUN_FILE_INSERT_PLAINTEXT:
 537         case LFUN_BOOKMARK_SAVE:
 538                 // FIXME: Actually, these LFUNS should be moved to Text
 539                 flag.enabled(cur.inTexted());
 540                 break;
 541         case LFUN_FONT_STATE:
 542         case LFUN_LABEL_INSERT:
 543         case LFUN_PARAGRAPH_GOTO:
 544         // FIXME handle non-trivially
 545         case LFUN_OUTLINE_UP:
 546         case LFUN_OUTLINE_DOWN:
 547         case LFUN_OUTLINE_IN:
 548         case LFUN_OUTLINE_OUT:
 549         case LFUN_NOTE_NEXT:
 550         case LFUN_REFERENCE_NEXT:
 551         case LFUN_WORD_FIND:
 552         case LFUN_WORD_REPLACE:
 553         case LFUN_MARK_OFF:
 554         case LFUN_MARK_ON:
 555         case LFUN_MARK_TOGGLE:
 556         case LFUN_SCREEN_RECENTER:
 557         case LFUN_BIBTEX_DATABASE_ADD:
 558         case LFUN_BIBTEX_DATABASE_DEL:
 559         case LFUN_WORDS_COUNT:
 560         case LFUN_NEXT_INSET_TOGGLE:
 561                 flag.enabled(true);
 562                 break;
 563
 564         case LFUN_LABEL_GOTO: {
 565                 flag.enabled(!cmd.argument().empty()
 566                     || getInsetByCode<InsetRef>(cur, Inset::REF_CODE));
 567                 break;
 568         }
 569
 570         case LFUN_CHANGES_TRACK:
 571                 flag.enabled(true);
 572                 flag.setOnOff(buffer_.params().trackChanges);
 573                 break;
 574
 575         case LFUN_CHANGES_OUTPUT:
 576                 flag.enabled(true);
 577                 flag.setOnOff(buffer_.params().outputChanges);
 578                 break;
 579
 580         case LFUN_CHANGES_MERGE:
 581         case LFUN_CHANGE_NEXT:
 582         case LFUN_ALL_CHANGES_ACCEPT:
 583         case LFUN_ALL_CHANGES_REJECT:
 584                 // TODO: context-sensitive enabling of LFUNs
 585                 // In principle, these command should only be enabled if there
 586                 // is a change in the document. However, without proper
 587                 // optimizations, this will inevitably result in poor performance.
 588                 flag.enabled(true);
 589                 break;
 590
 591         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 592                 flag.setOnOff(buffer_.params().compressed);
 593                 break;
 594         }
 595
 596         default:
 597                 flag.enabled(false);
 598         }
 599
 600         return flag;
 601 }
 602
 603
 604 Update::flags BufferView::dispatch(FuncRequest const & cmd)
 605 {
 606         //lyxerr << BOOST_CURRENT_FUNCTION
 607         //       << [ cmd = " << cmd << "]" << endl;
 608
 609         // Make sure that the cached BufferView is correct.
 610         LYXERR(Debug::ACTION) << BOOST_CURRENT_FUNCTION
 611                 << " action[" << cmd.action << ']'
 612                 << " arg[" << to_utf8(cmd.argument()) << ']'
 613                 << " x[" << cmd.x << ']'
 614                 << " y[" << cmd.y << ']'
 615                 << " button[" << cmd.button() << ']'
 616                 << endl;
 617
 618         Cursor & cur = cursor_;
 619         // Default Update flags.
 620         Update::flags updateFlags = Update::Force | Update::FitCursor;
 621
 622         switch (cmd.action) {
 623
 624         case LFUN_UNDO:
 625                 cur.message(_("Undo"));
 626                 cur.clearSelection();
 627                 if (!textUndo(*this)) {
 628                         cur.message(_("No further undo information"));
 629                         updateFlags = Update::None;
 630                 }
 631                 break;
 632
 633         case LFUN_REDO:
 634                 cur.message(_("Redo"));
 635                 cur.clearSelection();
 636                 if (!textRedo(*this)) {
 637                         cur.message(_("No further redo information"));
 638                         updateFlags = Update::None;
 639                 }
 640                 break;
 641
 642         case LFUN_FILE_INSERT:
 643                 // FIXME UNICODE
 644                 menuInsertLyXFile(to_utf8(cmd.argument()));
 645                 break;
 646
 647         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 648                 // FIXME UNICODE
 649                 insertPlaintextFile(this, to_utf8(cmd.argument()), true);
 650                 break;
 651
 652         case LFUN_FILE_INSERT_PLAINTEXT:
 653                 // FIXME UNICODE
 654                 insertPlaintextFile(this, to_utf8(cmd.argument()), false);
 655                 break;
 656
 657         case LFUN_FONT_STATE:
 658                 cur.message(cur.currentState());
 659                 break;
 660
 661         case LFUN_BOOKMARK_SAVE:
 662                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 663                 break;
 664
 665         case LFUN_LABEL_GOTO: {
 666                 docstring label = cmd.argument();
 667                 if (label.empty()) {
 668                         InsetRef * inset =
 669                                 getInsetByCode<InsetRef>(cursor_,
 670                                                          Inset::REF_CODE);
 671                         if (inset) {
 672                                 label = inset->getParam("reference");
 673                                 // persistent=false: use temp_bookmark
 674                                 saveBookmark(0);
 675                         }
 676                 }
 677
 678                 if (!label.empty())
 679                         gotoLabel(label);
 680                 break;
 681         }
 682
 683         case LFUN_PARAGRAPH_GOTO: {
 684                 int const id = convert<int>(to_utf8(cmd.argument()));
 685                 int i = 0;
 686                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
 687                         b = theBufferList().next(b)) {
 688
 689                         ParIterator par = b->getParFromID(id);
 690                         if (par == b->par_iterator_end()) {
 691                                 LYXERR(Debug::INFO)
 692                                         << "No matching paragraph found! ["
 693                                         << id << "]." << endl;
 694                         } else {
 695                                 LYXERR(Debug::INFO)
 696                                         << "Paragraph " << par->id()
 697                                         << " found in buffer `"
 698                                         << b->fileName() << "'." << endl;
 699
 700                                 if (b == &buffer_) {
 701                                         // Set the cursor
 702                                         setCursor(makeDocIterator(par, 0));
 703                                 } else {
 704                                         // Switch to other buffer view and resend cmd
 705                                         theLyXFunc().dispatch(FuncRequest(
 706                                                 LFUN_BUFFER_SWITCH, b->fileName()));
 707                                         theLyXFunc().dispatch(cmd);
 708                                         updateFlags = Update::None;
 709                                 }
 710                                 break;
 711                         }
 712                         ++i;
 713                 }
 714                 break;
 715         }
 716
 717         case LFUN_OUTLINE_UP:
 718                 toc::outline(toc::Up, cursor_);
 719                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 720                 updateLabels(buffer_);
 721                 break;
 722         case LFUN_OUTLINE_DOWN:
 723                 toc::outline(toc::Down, cursor_);
 724                 cursor_.text()->setCursor(cursor_, cursor_.pit(), 0);
 725                 updateLabels(buffer_);
 726                 break;
 727         case LFUN_OUTLINE_IN:
 728                 toc::outline(toc::In, cursor_);
 729                 updateLabels(buffer_);
 730                 break;
 731         case LFUN_OUTLINE_OUT:
 732                 toc::outline(toc::Out, cursor_);
 733                 updateLabels(buffer_);
 734                 break;
 735
 736         case LFUN_NOTE_NEXT:
 737                 bv_funcs::gotoInset(this, Inset::NOTE_CODE, false);
 738                 break;
 739
 740         case LFUN_REFERENCE_NEXT: {
 741                 vector<Inset_code> tmp;
 742                 tmp.push_back(Inset::LABEL_CODE);
 743                 tmp.push_back(Inset::REF_CODE);
 744                 bv_funcs::gotoInset(this, tmp, true);
 745                 break;
 746         }
 747
 748         case LFUN_CHANGES_TRACK:
 749                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
 750                 break;
 751
 752         case LFUN_CHANGES_OUTPUT:
 753                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
 754                 if (buffer_.params().outputChanges) {
 755                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
 756                         bool xcolorsoul = LaTeXFeatures::isAvailable("soul") &&
 757                                           LaTeXFeatures::isAvailable("xcolor");
 758
 759                         if (!dvipost && !xcolorsoul) {
 760                                 Alert::warning(_("Changes not shown in LaTeX output"),
 761                                                _("Changes will not be highlighted in LaTeX output, "
 762                                                  "because neither dvipost nor xcolor/soul are installed.\n"
 763                                                  "Please install these packages or redefine "
 764                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
 765                         } else if (!xcolorsoul) {
 766                                 Alert::warning(_("Changes not shown in LaTeX output"),
 767                                                _("Changes will not be highlighted in LaTeX output "
 768                                                  "when using pdflatex, because xcolor and soul are not installed.\n"
 769                                                  "Please install both packages or redefine "
 770                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
 771                         }
 772                 }
 773                 break;
 774
 775         case LFUN_CHANGE_NEXT:
 776                 findNextChange(this);
 777                 break;
 778
 779         case LFUN_CHANGES_MERGE:
 780                 if (findNextChange(this))
 781                         showDialog("changes");
 782                 break;
 783
 784         case LFUN_ALL_CHANGES_ACCEPT:
 785                 // select complete document
 786                 cursor_.reset(buffer_.inset());
 787                 cursor_.selHandle(true);
 788                 buffer_.text().cursorBottom(cursor_);
 789                 // accept everything in a single step to support atomic undo
 790                 buffer_.text().acceptOrRejectChanges(cursor_, Text::ACCEPT);
 791                 break;
 792
 793         case LFUN_ALL_CHANGES_REJECT:
 794                 // select complete document
 795                 cursor_.reset(buffer_.inset());
 796                 cursor_.selHandle(true);
 797                 buffer_.text().cursorBottom(cursor_);
 798                 // reject everything in a single step to support atomic undo
 799                 // Note: reject does not work recursively; the user may have to repeat the operation
 800                 buffer_.text().acceptOrRejectChanges(cursor_, Text::REJECT);
 801                 break;
 802
 803         case LFUN_WORD_FIND:
 804                 find(this, cmd);
 805                 break;
 806
 807         case LFUN_WORD_REPLACE: {
 808                 bool has_deleted = false;
 809                 if (cur.selection()) {
 810                         DocIterator beg = cur.selectionBegin();
 811                         DocIterator end = cur.selectionEnd();
 812                         if (beg.pit() == end.pit()) {
 813                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
 814                                         if (cur.paragraph().isDeleted(p))
 815                                                 has_deleted = true;
 816                                 }
 817                         }
 818                 }
 819                 replace(this, cmd, has_deleted);
 820                 break;
 821         }
 822
 823         case LFUN_MARK_OFF:
 824                 cur.clearSelection();
 825                 cur.resetAnchor();
 826                 cur.message(from_utf8(N_("Mark off")));
 827                 break;
 828
 829         case LFUN_MARK_ON:
 830                 cur.clearSelection();
 831                 cur.mark() = true;
 832                 cur.resetAnchor();
 833                 cur.message(from_utf8(N_("Mark on")));
 834                 break;
 835
 836         case LFUN_MARK_TOGGLE:
 837                 cur.clearSelection();
 838                 if (cur.mark()) {
 839                         cur.mark() = false;
 840                         cur.message(from_utf8(N_("Mark removed")));
 841                 } else {
 842                         cur.mark() = true;
 843                         cur.message(from_utf8(N_("Mark set")));
 844                 }
 845                 cur.resetAnchor();
 846                 break;
 847
 848         case LFUN_SCREEN_RECENTER:
 849                 center();
 850                 break;
 851
 852         case LFUN_BIBTEX_DATABASE_ADD: {
 853                 Cursor tmpcur = cursor_;
 854                 bv_funcs::findInset(tmpcur, Inset::BIBTEX_CODE, false);
 855                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 856                                                 Inset::BIBTEX_CODE);
 857                 if (inset) {
 858                         if (inset->addDatabase(to_utf8(cmd.argument())))
 859                                 buffer_.updateBibfilesCache();
 860                 }
 861                 break;
 862         }
 863
 864         case LFUN_BIBTEX_DATABASE_DEL: {
 865                 Cursor tmpcur = cursor_;
 866                 bv_funcs::findInset(tmpcur, Inset::BIBTEX_CODE, false);
 867                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
 868                                                 Inset::BIBTEX_CODE);
 869                 if (inset) {
 870                         if (inset->delDatabase(to_utf8(cmd.argument())))
 871                                 buffer_.updateBibfilesCache();
 872                 }
 873                 break;
 874         }
 875
 876         case LFUN_WORDS_COUNT: {
 877                 DocIterator from, to;
 878                 if (cur.selection()) {
 879                         from = cur.selectionBegin();
 880                         to = cur.selectionEnd();
 881                 } else {
 882                         from = doc_iterator_begin(buffer_.inset());
 883                         to = doc_iterator_end(buffer_.inset());
 884                 }
 885                 int const count = countWords(from, to);
 886                 docstring message;
 887                 if (count != 1) {
 888                         if (cur.selection())
 889                                 message = bformat(_("%1$d words in selection."),
 890                                           count);
 891                                 else
 892                                         message = bformat(_("%1$d words in document."),
 893                                                           count);
 894                 }
 895                 else {
 896                         if (cur.selection())
 897                                 message = _("One word in selection.");
 898                         else
 899                                 message = _("One word in document.");
 900                 }
 901
 902                 Alert::information(_("Count words"), message);
 903         }
 904                 break;
 905
 906         case LFUN_BUFFER_TOGGLE_COMPRESSION:
 907                 // turn compression on/off
 908                 buffer_.params().compressed = !buffer_.params().compressed;
 909                 break;
 910
 911         case LFUN_NEXT_INSET_TOGGLE: {
 912                 // this is the real function we want to invoke
 913                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
 914                 // if there is an inset at cursor, see whether it
 915                 // wants to toggle.
 916                 Inset * inset = cur.nextInset();
 917                 if (inset && 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                 }
 925                 // if it did not work, try the underlying inset.
 926                 if (!cur.result().dispatched())
 927                         cur.dispatch(tmpcmd);
 928
 929                 if (cur.result().dispatched())
 930                         cur.clearSelection();
 931
 932                 break;
 933         }
 934
 935         default:
 936                 updateFlags = Update::None;
 937         }
 938
 939         return updateFlags;
 940 }
 941
 942
 943 docstring const BufferView::requestSelection()
 944 {
 945         Cursor & cur = cursor_;
 946
 947         if (!cur.selection()) {
 948                 xsel_cache_.set = false;
 949                 return docstring();
 950         }
 951
 952         if (!xsel_cache_.set ||
 953             cur.top() != xsel_cache_.cursor ||
 954             cur.anchor_.top() != xsel_cache_.anchor)
 955         {
 956                 xsel_cache_.cursor = cur.top();
 957                 xsel_cache_.anchor = cur.anchor_.top();
 958                 xsel_cache_.set = cur.selection();
 959                 return cur.selectionAsString(false);
 960         }
 961         return docstring();
 962 }
 963
 964
 965 void BufferView::clearSelection()
 966 {
 967         cursor_.clearSelection();
 968         // Clear the selection buffer. Otherwise a subsequent
 969         // middle-mouse-button paste would use the selection buffer,
 970         // not the more current external selection.
 971         cap::clearSelection();
 972         xsel_cache_.set = false;
 973         // The buffer did not really change, but this causes the
 974         // redraw we need because we cleared the selection above.
 975         buffer_.changed();
 976 }
 977
 978
 979 void BufferView::resize(int width, int height)
 980 {
 981         // Update from work area
 982         width_ = width;
 983         height_ = height;
 984
 985         // The complete text metrics will be redone.
 986         text_metrics_.clear();
 987         updateMetrics(false);
 988 }
 989
 990
 991 Inset const * BufferView::getCoveringInset(Text const & text, int x, int y)
 992 {
 993         pit_type pit = text.getPitNearY(*this, y);
 994         BOOST_ASSERT(pit != -1);
 995         Paragraph const & par = text.getPar(pit);
 996
 997         LYXERR(Debug::DEBUG)
 998                 << BOOST_CURRENT_FUNCTION
 999                 << ": x: " << x
1000                 << " y: " << y
1001                 << "  pit: " << pit
1002                 << endl;
1003         InsetList::const_iterator iit = par.insetlist.begin();
1004         InsetList::const_iterator iend = par.insetlist.end();
1005         for (; iit != iend; ++iit) {
1006                 Inset * const inset = iit->inset;
1007                 if (inset->covers(*this, x, y)) {
1008                         if (!inset->descendable())
1009                                 // No need to go further down if the inset is not
1010                                 // descendable.
1011                                 return inset;
1012
1013                         size_t cell_number = inset->nargs();
1014                         // Check all the inner cell.
1015                         for (size_t i = 0; i != cell_number; ++i) {
1016                                 Text const * inner_text = inset->getText(i);
1017                                 if (inner_text) {
1018                                         // Try deeper.
1019                                         Inset const * inset_deeper =
1020                                                 getCoveringInset(*inner_text, x, y);
1021                                         if (inset_deeper)
1022                                                 return inset_deeper;
1023                                 }
1024                         }
1025
1026                         LYXERR(Debug::DEBUG)
1027                                 << BOOST_CURRENT_FUNCTION
1028                                 << ": Hit inset: " << inset << endl;
1029                         return inset;
1030                 }
1031         }
1032         LYXERR(Debug::DEBUG)
1033                 << BOOST_CURRENT_FUNCTION
1034                 << ": No inset hit. " << endl;
1035         return 0;
1036 }
1037
1038
1039 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
1040 {
1041         //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
1042
1043         // This is only called for mouse related events including
1044         // LFUN_FILE_OPEN generated by drag-and-drop.
1045         FuncRequest cmd = cmd0;
1046
1047         Cursor cur(*this);
1048         cur.push(buffer_.inset());
1049         cur.selection() = cursor_.selection();
1050
1051         // Either the inset under the cursor or the
1052         // surrounding Text will handle this event.
1053
1054         // make sure we stay within the screen...
1055         cmd.y = min(max(cmd.y, -1), height_);
1056
1057         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1058
1059                 // Get inset under mouse, if there is one.
1060                 Inset const * covering_inset =
1061                         getCoveringInset(buffer_.text(), cmd.x, cmd.y);
1062                 if (covering_inset == last_inset_)
1063                         // Same inset, no need to do anything...
1064                         return false;
1065
1066                 bool need_redraw = false;
1067                 // const_cast because of setMouseHover().
1068                 Inset * inset = const_cast<Inset *>(covering_inset);
1069                 if (last_inset_)
1070                         // Remove the hint on the last hovered inset (if any).
1071                         need_redraw |= last_inset_->setMouseHover(false);
1072                 if (inset)
1073                         // Highlighted the newly hovered inset (if any).
1074                         need_redraw |= inset->setMouseHover(true);
1075                 last_inset_ = inset;
1076
1077                 // if last metrics update was in singlepar mode, WorkArea::redraw() will
1078                 // not expose the button for redraw. We adjust here the metrics dimension
1079                 // to enable a full redraw.
1080                 // FIXME: It is possible to redraw only the area around the button!
1081                 if (need_redraw
1082                         && metrics_info_.update_strategy == SingleParUpdate) {
1083                         // FIXME: It should be possible to redraw only the area around
1084                         // the button by doing this:
1085                         //
1086                         //metrics_info_.singlepar = false;
1087                         //metrics_info_.y1 = ymin of button;
1088                         //metrics_info_.y2 = ymax of button;
1089                         //
1090                         // Unfortunately, BufferView::draw() does not distinguish
1091                         // between background updates and text updates. So we use the hammer
1092                         // solution for now. We could also avoid the updateMetrics() below
1093                         // by using the first and last pit of the CoordCache. Have a look
1094                         // at Text::getPitNearY() to see what I mean.
1095                         //
1096                         //metrics_info_.pit1 = first pit of CoordCache;
1097                         //metrics_info_.pit2 = last pit of CoordCache;
1098                         //metrics_info_.singlepar = false;
1099                         //metrics_info_.y1 = 0;
1100                         //metrics_info_.y2 = height_;
1101                         //
1102                         updateMetrics(false);
1103                 }
1104
1105                 // This event (moving without mouse click) is not passed further.
1106                 // This should be changed if it is further utilized.
1107                 return need_redraw;
1108         }
1109
1110         // Build temporary cursor.
1111         Inset * inset = buffer_.text().editXY(cur, cmd.x, cmd.y);
1112
1113         // Put anchor at the same position.
1114         cur.resetAnchor();
1115
1116         // Try to dispatch to an non-editable inset near this position
1117         // via the temp cursor. If the inset wishes to change the real
1118         // cursor it has to do so explicitly by using
1119         //  cur.bv().cursor() = cur;  (or similar)
1120         if (inset) {
1121                 inset->dispatch(cur, cmd);
1122         }
1123
1124         // Now dispatch to the temporary cursor. If the real cursor should
1125         // be modified, the inset's dispatch has to do so explicitly.
1126         if (!cur.result().dispatched())
1127                 cur.dispatch(cmd);
1128
1129         //Do we have a selection?
1130         theSelection().haveSelection(cursor().selection());
1131
1132         // Redraw if requested and necessary.
1133         if (cur.result().dispatched() && cur.result().update())
1134                 return update(cur.result().update());
1135
1136         return false;
1137 }
1138
1139
1140 void BufferView::scroll(int /*lines*/)
1141 {
1142 //      Text const * t = buffer_.text();
1143 //      int const line_height = defaultRowHeight();
1144 //
1145 //      // The new absolute coordinate
1146 //      int new_top_y = top_y() + lines * line_height;
1147 //
1148 //      // Restrict to a valid value
1149 //      new_top_y = std::min(t->height() - 4 * line_height, new_top_y);
1150 //      new_top_y = std::max(0, new_top_y);
1151 //
1152 //      scrollDocView(new_top_y);
1153 //
1154 }
1155
1156
1157 void BufferView::setCursorFromRow(int row)
1158 {
1159         int tmpid = -1;
1160         int tmppos = -1;
1161
1162         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
1163
1164         cursor_.reset(buffer_.inset());
1165         if (tmpid == -1)
1166                 buffer_.text().setCursor(cursor_, 0, 0);
1167         else
1168                 buffer_.text().setCursor(cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
1169 }
1170
1171
1172 void BufferView::gotoLabel(docstring const & label)
1173 {
1174         for (InsetIterator it = inset_iterator_begin(buffer_.inset()); it; ++it) {
1175                 vector<docstring> labels;
1176                 it->getLabelList(buffer_, labels);
1177                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1178                         setCursor(it);
1179                         update();
1180                         return;
1181                 }
1182         }
1183 }
1184
1185
1186 TextMetrics const & BufferView::textMetrics(Text const * t) const
1187 {
1188         return const_cast<BufferView *>(this)->textMetrics(t);
1189 }
1190
1191
1192 TextMetrics & BufferView::textMetrics(Text const * t)
1193 {
1194         TextMetricsCache::iterator tmc_it  = text_metrics_.find(t);
1195         if (tmc_it == text_metrics_.end()) {
1196                 tmc_it = text_metrics_.insert(
1197                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
1198         }
1199         return tmc_it->second;
1200 }
1201
1202
1203 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
1204                 pit_type pit) const
1205 {
1206         return textMetrics(t).parMetrics(pit);
1207 }
1208
1209
1210 int BufferView::workHeight() const
1211 {
1212         return height_;
1213 }
1214
1215
1216 void BufferView::setCursor(DocIterator const & dit)
1217 {
1218         size_t const n = dit.depth();
1219         for (size_t i = 0; i < n; ++i)
1220                 dit[i].inset().edit(cursor_, true);
1221
1222         cursor_.setCursor(dit);
1223         cursor_.selection() = false;
1224 }
1225
1226
1227 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
1228 {
1229         // Would be wrong to delete anything if we have a selection.
1230         if (cur.selection())
1231                 return false;
1232
1233         bool need_anchor_change = false;
1234         bool changed = cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1235                 need_anchor_change);
1236
1237         if (need_anchor_change)
1238                 cur.resetAnchor();
1239
1240         if (!changed)
1241                 return false;
1242
1243         updateLabels(buffer_);
1244
1245         updateMetrics(false);
1246         buffer_.changed();
1247         return true;
1248 }
1249
1250
1251 bool BufferView::mouseSetCursor(Cursor & cur)
1252 {
1253         BOOST_ASSERT(&cur.bv() == this);
1254
1255         // this event will clear selection so we save selection for
1256         // persistent selection
1257         cap::saveSelection(cursor());
1258
1259         // Has the cursor just left the inset?
1260         bool badcursor = false;
1261         bool leftinset = (&cursor_.inset() != &cur.inset());
1262         if (leftinset)
1263                 badcursor = notifyCursorLeaves(cursor_, cur);
1264
1265         // do the dEPM magic if needed
1266         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
1267         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
1268         // the leftinset bool would not be necessary (badcursor instead).
1269         bool update = leftinset;
1270         if (!badcursor && cursor_.inTexted())
1271                 update |= checkDepm(cur, cursor_);
1272
1273         // if the cursor was in an empty script inset and the new
1274         // position is in the nucleus of the inset, notifyCursorLeaves
1275         // will kill the script inset itself. So we check all the
1276         // elements of the cursor to make sure that they are correct.
1277         // For an example, see bug 2933:
1278         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1279         // The code below could maybe be moved to a DocIterator method.
1280         //lyxerr << "cur before " << cur <<std::endl;
1281         DocIterator dit(cur.inset());
1282         dit.push_back(cur.bottom());
1283         size_t i = 1;
1284         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1285                 dit.push_back(cur[i]);
1286                 ++i;
1287         }
1288         //lyxerr << "5 cur after" << dit <<std::endl;
1289
1290         cursor_.setCursor(dit);
1291         cursor_.boundary(cur.boundary());
1292         cursor_.clearSelection();
1293         finishUndo();
1294         return update;
1295 }
1296
1297
1298 void BufferView::putSelectionAt(DocIterator const & cur,
1299                                 int length, bool backwards)
1300 {
1301         cursor_.clearSelection();
1302
1303         setCursor(cur);
1304
1305         if (length) {
1306                 if (backwards) {
1307                         cursor_.pos() += length;
1308                         cursor_.setSelection(cursor_, -length);
1309                 } else
1310                         cursor_.setSelection(cursor_, length);
1311         }
1312 }
1313
1314
1315 Cursor & BufferView::cursor()
1316 {
1317         return cursor_;
1318 }
1319
1320
1321 Cursor const & BufferView::cursor() const
1322 {
1323         return cursor_;
1324 }
1325
1326
1327 pit_type BufferView::anchor_ref() const
1328 {
1329         return anchor_ref_;
1330 }
1331
1332
1333 ViewMetricsInfo const & BufferView::viewMetricsInfo()
1334 {
1335         return metrics_info_;
1336 }
1337
1338
1339 // FIXME: We should split-up updateMetrics() for the singlepar case.
1340 void BufferView::updateMetrics(bool singlepar)
1341 {
1342         Text & buftext = buffer_.text();
1343         TextMetrics & tm = textMetrics(&buftext);
1344         pit_type size = int(buftext.paragraphs().size());
1345
1346         if (anchor_ref_ > int(buftext.paragraphs().size() - 1)) {
1347                 anchor_ref_ = int(buftext.paragraphs().size() - 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                 tm.clear();
1358         }
1359
1360         // If the paragraph metrics has changed, we can not
1361         // use the singlepar optimisation.
1362         if (singlepar
1363                 // In Single Paragraph mode, rebreak only
1364                 // the (main text, not inset!) paragraph containing the cursor.
1365                 // (if this paragraph contains insets etc., rebreaking will
1366                 // recursively descend)
1367                 && tm.redoParagraph(cursor_.bottom().pit()))
1368                 singlepar = false;
1369
1370         pit_type const pit = anchor_ref_;
1371         int pit1 = pit;
1372         int pit2 = pit;
1373         size_t const npit = buftext.paragraphs().size();
1374
1375         // Rebreak anchor paragraph.
1376         if (!singlepar)
1377                 tm.redoParagraph(pit);
1378
1379         updateOffsetRef();
1380
1381         int y0 = tm.parMetrics(pit).ascent() - offset_ref_;
1382
1383         // Redo paragraphs above anchor if necessary.
1384         int y1 = y0;
1385         while (y1 > 0 && pit1 > 0) {
1386                 y1 -= tm.parMetrics(pit1).ascent();
1387                 --pit1;
1388                 if (!singlepar)
1389                         tm.redoParagraph(pit1);
1390                 y1 -= tm.parMetrics(pit1).descent();
1391         }
1392
1393
1394         // Take care of ascent of first line
1395         y1 -= tm.parMetrics(pit1).ascent();
1396
1397         // Normalize anchor for next time
1398         anchor_ref_ = pit1;
1399         offset_ref_ = -y1;
1400
1401         // Grey at the beginning is ugly
1402         if (pit1 == 0 && y1 > 0) {
1403                 y0 -= y1;
1404                 y1 = 0;
1405                 anchor_ref_ = 0;
1406         }
1407
1408         // Redo paragraphs below the anchor if necessary.
1409         int y2 = y0;
1410         while (y2 < height_ && pit2 < int(npit) - 1) {
1411                 y2 += tm.parMetrics(pit2).descent();
1412                 ++pit2;
1413                 if (!singlepar)
1414                         tm.redoParagraph(pit2);
1415                 y2 += tm.parMetrics(pit2).ascent();
1416         }
1417
1418         // Take care of descent of last line
1419         y2 += tm.parMetrics(pit2).descent();
1420
1421         // The coordinates of all these paragraphs are correct, cache them
1422         int y = y1;
1423         CoordCache::InnerParPosCache & parPos = coord_cache_.parPos()[&buftext];
1424         for (pit_type pit = pit1; pit <= pit2; ++pit) {
1425                 ParagraphMetrics const & pm = tm.parMetrics(pit);
1426                 y += pm.ascent();
1427                 parPos[pit] = Point(0, y);
1428                 if (singlepar && pit == cursor_.bottom().pit()) {
1429                         // In Single Paragraph mode, collect here the
1430                         // y1 and y2 of the (one) paragraph the cursor is in
1431                         y1 = y - pm.ascent();
1432                         y2 = y + pm.descent();
1433                 }
1434                 y += pm.descent();
1435         }
1436
1437         if (singlepar) {
1438                 // collect cursor paragraph iter bounds
1439                 pit1 = cursor_.bottom().pit();
1440                 pit2 = cursor_.bottom().pit();
1441         }
1442
1443         LYXERR(Debug::DEBUG)
1444                 << BOOST_CURRENT_FUNCTION
1445                 << " y1: " << y1
1446                 << " y2: " << y2
1447                 << " pit1: " << pit1
1448                 << " pit2: " << pit2
1449                 << " npit: " << npit
1450                 << " singlepar: " << singlepar
1451                 << "size: " << size
1452                 << endl;
1453
1454         metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2,
1455                 singlepar? SingleParUpdate: FullScreenUpdate, size);
1456
1457         if (lyxerr.debugging(Debug::WORKAREA)) {
1458                 LYXERR(Debug::WORKAREA) << "BufferView::updateMetrics" << endl;
1459                 coord_cache_.dump();
1460         }
1461 }
1462
1463
1464 void BufferView::menuInsertLyXFile(string const & filenm)
1465 {
1466         BOOST_ASSERT(cursor_.inTexted());
1467         string filename = filenm;
1468
1469         if (filename.empty()) {
1470                 // Launch a file browser
1471                 // FIXME UNICODE
1472                 string initpath = lyxrc.document_path;
1473                 string const trypath = buffer_.filePath();
1474                 // If directory is writeable, use this as default.
1475                 if (isDirWriteable(FileName(trypath)))
1476                         initpath = trypath;
1477
1478                 // FIXME UNICODE
1479                 FileDialog fileDlg(_("Select LyX document to insert"),
1480                         LFUN_FILE_INSERT,
1481                         make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
1482                         make_pair(_("Examples|#E#e"),
1483                                     from_utf8(addPath(package().system_support().absFilename(),
1484                                     "examples"))));
1485
1486                 FileDialog::Result result =
1487                         fileDlg.open(from_utf8(initpath),
1488                                      FileFilterList(_("LyX Documents (*.lyx)")),
1489                                      docstring());
1490
1491                 if (result.first == FileDialog::Later)
1492                         return;
1493
1494                 // FIXME UNICODE
1495                 filename = to_utf8(result.second);
1496
1497                 // check selected filename
1498                 if (filename.empty()) {
1499                         // emit message signal.
1500                         message(_("Canceled."));
1501                         return;
1502                 }
1503         }
1504
1505         // Get absolute path of file and add ".lyx"
1506         // to the filename if necessary
1507         filename = fileSearch(string(), filename, "lyx").absFilename();
1508
1509         docstring const disp_fn = makeDisplayPath(filename);
1510         // emit message signal.
1511         message(bformat(_("Inserting document %1$s..."), disp_fn));
1512
1513         docstring res;
1514         Buffer buf("", false);
1515         if (lyx::loadLyXFile(&buf, FileName(filename))) {
1516                 ErrorList & el = buffer_.errorList("Parse");
1517                 // Copy the inserted document error list into the current buffer one.
1518                 el = buf.errorList("Parse");
1519                 recordUndo(cursor_);
1520                 cap::pasteParagraphList(cursor_, buf.paragraphs(),
1521                                              buf.params().getTextClass_ptr(), el);
1522                 res = _("Document %1$s inserted.");
1523         } else
1524                 res = _("Could not insert document %1$s");
1525
1526         // emit message signal.
1527         message(bformat(res, disp_fn));
1528         buffer_.errors("Parse");
1529         updateMetrics(false);
1530 }
1531
1532
1533 void BufferView::draw(frontend::Painter & pain)
1534 {
1535         Text & text = buffer_.text();
1536         bool const select = cursor_.selection();
1537
1538         PainterInfo pi(this, pain);
1539         // Should the whole screen, including insets, be refreshed?
1540         // FIXME: We should also distinguish DecorationUpdate to avoid text
1541         // drawing if possible. This is not possible to do easily right now
1542         // because of the single backing pixmap.
1543         bool repaintAll = select
1544                 || metrics_info_.update_strategy != SingleParUpdate;
1545
1546         if (repaintAll)
1547                 // Clear background (if not delegated to rows)
1548                 pain.fillRectangle(0, metrics_info_.y1, width_,
1549                         metrics_info_.y2 - metrics_info_.y1, text.backgroundColor());
1550
1551         if (select)
1552                 text.drawSelection(pi, 0, 0);
1553
1554         int yy = metrics_info_.y1;
1555         // draw contents
1556         for (pit_type pit = metrics_info_.p1; pit <= metrics_info_.p2; ++pit) {
1557                 ParagraphMetrics const & pm = parMetrics(&text, pit);
1558                 yy += pm.ascent();
1559                 paintPar(pi, text, pit, 0, yy, repaintAll);
1560                 yy += pm.descent();
1561         }
1562
1563         // and grey out above (should not happen later)
1564 //      lyxerr << "par ascent: " << text.getPar(metrics_info_.p1).ascent() << endl;
1565         if (metrics_info_.y1 > 0
1566                 && metrics_info_.update_strategy == FullScreenUpdate)
1567                 pain.fillRectangle(0, 0, width_, metrics_info_.y1, Color::bottomarea);
1568
1569         // and possibly grey out below
1570 //      lyxerr << "par descent: " << text.getPar(metrics_info_.p1).ascent() << endl;
1571         if (metrics_info_.y2 < height_
1572                 && metrics_info_.update_strategy == FullScreenUpdate)
1573                 pain.fillRectangle(0, metrics_info_.y2, width_,
1574                         height_ - metrics_info_.y2, Color::bottomarea);
1575 }
1576
1577 } // namespace lyx