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 "CoordCache.h"
  24 #include "Cursor.h"
  25 #include "CutAndPaste.h"
  26 #include "DispatchResult.h"
  27 #include "EmbeddedFiles.h"
  28 #include "ErrorList.h"
  29 #include "factory.h"
  30 #include "FloatList.h"
  31 #include "FuncRequest.h"
  32 #include "FuncStatus.h"
  33 #include "Intl.h"
  34 #include "InsetIterator.h"
  35 #include "Language.h"
  36 #include "LaTeXFeatures.h"
  37 #include "LyX.h"
  38 #include "lyxfind.h"
  39 #include "LyXFunc.h"
  40 #include "Layout.h"
  41 #include "LyXRC.h"
  42 #include "MetricsInfo.h"
  43 #include "Paragraph.h"
  44 #include "paragraph_funcs.h"
  45 #include "ParagraphParameters.h"
  46 #include "ParIterator.h"
  47 #include "Session.h"
  48 #include "Text.h"
  49 #include "TextClass.h"
  50 #include "TextMetrics.h"
  51 #include "TexRow.h"
  52 #include "TocBackend.h"
  53 #include "VSpace.h"
  54 #include "WordLangTuple.h"
  55
  56 #include "insets/InsetBibtex.h"
  57 #include "insets/InsetCommand.h" // ChangeRefs
  58 #include "insets/InsetExternal.h"
  59 #include "insets/InsetGraphics.h"
  60 #include "insets/InsetRef.h"
  61 #include "insets/InsetText.h"
  62
  63 #include "frontends/alert.h"
  64 #include "frontends/Application.h"
  65 #include "frontends/Delegates.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/debug.h"
  74 #include "support/ExceptionMessage.h"
  75 #include "support/filetools.h"
  76 #include "support/gettext.h"
  77 #include "support/lstrings.h"
  78 #include "support/Package.h"
  79 #include "support/types.h"
  80
  81 #include <cerrno>
  82 #include <fstream>
  83 #include <functional>
  84 #include <iterator>
  85 #include <vector>
  86
  87 using namespace std;
  88 using namespace lyx::support;
  89
  90 namespace lyx {
  91
  92 namespace Alert = frontend::Alert;
  93
  94 namespace {
  95
  96 /// Return an inset of this class if it exists at the current cursor position
  97 template <class T>
  98 T * getInsetByCode(Cursor const & cur, InsetCode code)
  99 {
 100         DocIterator it = cur;
 101         Inset * inset = it.nextInset();
 102         if (inset && inset->lyxCode() == code)
 103                 return static_cast<T*>(inset);
 104         return 0;
 105 }
 106
 107
 108 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 109         bool same_content);
 110
 111 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 112         docstring const & contents)
 113 {
 114         DocIterator tmpdit = dit;
 115
 116         while (tmpdit) {
 117                 Inset const * inset = tmpdit.nextInset();
 118                 if (inset
 119                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()
 120                     && (contents.empty() ||
 121                     static_cast<InsetCommand const *>(inset)->getFirstNonOptParam() == contents)) {
 122                         dit = tmpdit;
 123                         return true;
 124                 }
 125                 tmpdit.forwardInset();
 126         }
 127
 128         return false;
 129 }
 130
 131
 132 /// Looks for next inset with one of the given codes.
 133 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 134         bool same_content)
 135 {
 136         docstring contents;
 137         DocIterator tmpdit = dit;
 138         tmpdit.forwardInset();
 139         if (!tmpdit)
 140                 return false;
 141
 142         if (same_content) {
 143                 Inset const * inset = tmpdit.nextInset();
 144                 if (inset
 145                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()) {
 146                         contents = static_cast<InsetCommand const *>(inset)->getFirstNonOptParam();
 147                 }
 148         }
 149
 150         if (!findNextInset(tmpdit, codes, contents)) {
 151                 if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
 152                         tmpdit  = doc_iterator_begin(tmpdit.bottom().inset());
 153                         if (!findNextInset(tmpdit, codes, contents))
 154                                 return false;
 155                 } else
 156                         return false;
 157         }
 158
 159         dit = tmpdit;
 160         return true;
 161 }
 162
 163
 164 /// Looks for next inset with the given code
 165 void findInset(DocIterator & dit, InsetCode code, bool same_content)
 166 {
 167         findInset(dit, vector<InsetCode>(1, code), same_content);
 168 }
 169
 170
 171 /// Moves cursor to the next inset with one of the given codes.
 172 void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
 173                bool same_content)
 174 {
 175         Cursor tmpcur = bv->cursor();
 176         if (!findInset(tmpcur, codes, same_content)) {
 177                 bv->cursor().message(_("No more insets"));
 178                 return;
 179         }
 180
 181         tmpcur.clearSelection();
 182         bv->setCursor(tmpcur);
 183         bv->showCursor();
 184 }
 185
 186
 187 /// Moves cursor to the next inset with given code.
 188 void gotoInset(BufferView * bv, InsetCode code, bool same_content)
 189 {
 190         gotoInset(bv, vector<InsetCode>(1, code), same_content);
 191 }
 192
 193
 194 /// A map from a Text to the associated text metrics
 195 typedef map<Text const *, TextMetrics> TextMetricsCache;
 196
 197 enum ScreenUpdateStrategy {
 198         NoScreenUpdate,
 199         SingleParUpdate,
 200         FullScreenUpdate,
 201         DecorationUpdate
 202 };
 203
 204 } // anon namespace
 205
 206
 207 /////////////////////////////////////////////////////////////////////
 208 //
 209 // BufferView
 210 //
 211 /////////////////////////////////////////////////////////////////////
 212
 213 struct BufferView::Private
 214 {
 215         Private(BufferView & bv): wh_(0), cursor_(bv),
 216                 anchor_pit_(0), anchor_ypos_(0),
 217                 last_inset_(0), gui_(0)
 218         {}
 219
 220         ///
 221         ScrollbarParameters scrollbarParameters_;
 222         ///
 223         ScreenUpdateStrategy update_strategy_;
 224         ///
 225         CoordCache coord_cache_;
 226
 227         /// Estimated average par height for scrollbar.
 228         int wh_;
 229         /// this is used to handle XSelection events in the right manner.
 230         struct {
 231                 CursorSlice cursor;
 232                 CursorSlice anchor;
 233                 bool set;
 234         } xsel_cache_;
 235         ///
 236         Cursor cursor_;
 237         ///
 238         pit_type anchor_pit_;
 239         ///
 240         int anchor_ypos_;
 241         ///
 242         vector<int> par_height_;
 243
 244         ///
 245         DocIterator inlineCompletionPos;
 246         ///
 247         docstring inlineCompletion;
 248         ///
 249         size_t inlineCompletionUniqueChars;
 250
 251         /// keyboard mapping object.
 252         Intl intl_;
 253
 254         /// last visited inset.
 255         /** kept to send setMouseHover(false).
 256           * Not owned, so don't delete.
 257           */
 258         Inset * last_inset_;
 259
 260         mutable TextMetricsCache text_metrics_;
 261
 262         /// Whom to notify.
 263         /** Not owned, so don't delete.
 264           */
 265         frontend::GuiBufferViewDelegate * gui_;
 266 };
 267
 268
 269 BufferView::BufferView(Buffer & buf)
 270         : width_(0), height_(0), full_screen_(false), buffer_(buf), d(new Private(*this))
 271 {
 272         d->xsel_cache_.set = false;
 273         d->intl_.initKeyMapper(lyxrc.use_kbmap);
 274
 275         d->cursor_.push(buffer_.inset());
 276         d->cursor_.resetAnchor();
 277         d->cursor_.setCurrentFont();
 278
 279         if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 280                 graphics::Previews::get().generateBufferPreviews(buffer_);
 281 }
 282
 283
 284 BufferView::~BufferView()
 285 {
 286         // current buffer is going to be switched-off, save cursor pos
 287         // Ideally, the whole cursor stack should be saved, but session
 288         // currently can only handle bottom (whole document) level pit and pos.
 289         // That is to say, if a cursor is in a nested inset, it will be
 290         // restore to the left of the top level inset.
 291         LastFilePosSection::FilePos fp;
 292         fp.pit = d->cursor_.bottom().pit();
 293         fp.pos = d->cursor_.bottom().pos();
 294         LyX::ref().session().lastFilePos().save(buffer_.fileName(), fp);
 295
 296         delete d;
 297 }
 298
 299
 300 int BufferView::rightMargin() const
 301 {
 302         // The additional test for the case the outliner is opened.
 303         if (!full_screen_ ||
 304                 !lyxrc.full_screen_limit ||
 305                 width_ < lyxrc.full_screen_width + 20)
 306                         return 10;
 307
 308         return (width_ - lyxrc.full_screen_width) / 2;
 309 }
 310
 311
 312 int BufferView::leftMargin() const
 313 {
 314         return rightMargin();
 315 }
 316
 317
 318 bool BufferView::isTopScreen() const
 319 {
 320         return d->scrollbarParameters_.position == d->scrollbarParameters_.min;
 321 }
 322
 323
 324 bool BufferView::isBottomScreen() const
 325 {
 326         return d->scrollbarParameters_.position == d->scrollbarParameters_.max;
 327 }
 328
 329
 330 Intl & BufferView::getIntl()
 331 {
 332         return d->intl_;
 333 }
 334
 335
 336 Intl const & BufferView::getIntl() const
 337 {
 338         return d->intl_;
 339 }
 340
 341
 342 CoordCache & BufferView::coordCache()
 343 {
 344         return d->coord_cache_;
 345 }
 346
 347
 348 CoordCache const & BufferView::coordCache() const
 349 {
 350         return d->coord_cache_;
 351 }
 352
 353
 354 Buffer & BufferView::buffer()
 355 {
 356         return buffer_;
 357 }
 358
 359
 360 Buffer const & BufferView::buffer() const
 361 {
 362         return buffer_;
 363 }
 364
 365
 366 bool BufferView::fitCursor()
 367 {
 368         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
 369                 frontend::FontMetrics const & fm =
 370                         theFontMetrics(d->cursor_.getFont().fontInfo());
 371                 int const asc = fm.maxAscent();
 372                 int const des = fm.maxDescent();
 373                 Point const p = getPos(d->cursor_, d->cursor_.boundary());
 374                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 375                         return false;
 376         }
 377         return true;
 378 }
 379
 380
 381 void BufferView::processUpdateFlags(Update::flags flags)
 382 {
 383         // last_inset_ points to the last visited inset. This pointer may become
 384         // invalid because of keyboard editing. Since all such operations
 385         // causes screen update(), I reset last_inset_ to avoid such a problem.
 386         d->last_inset_ = 0;
 387         // This is close to a hot-path.
 388         LYXERR(Debug::DEBUG, "BufferView::processUpdateFlags()"
 389                 << "[fitcursor = " << (flags & Update::FitCursor)
 390                 << ", forceupdate = " << (flags & Update::Force)
 391                 << ", singlepar = " << (flags & Update::SinglePar)
 392                 << "]  buffer: " << &buffer_);
 393
 394         buffer_.updateMacros();
 395
 396         // Now do the first drawing step if needed. This consists on updating
 397         // the CoordCache in updateMetrics().
 398         // The second drawing step is done in WorkArea::redraw() if needed.
 399
 400         // Case when no explicit update is requested.
 401         if (!flags) {
 402                 // no need to redraw anything.
 403                 d->update_strategy_ = NoScreenUpdate;
 404                 return;
 405         }
 406
 407         if (flags == Update::Decoration) {
 408                 d->update_strategy_ = DecorationUpdate;
 409                 buffer_.changed();
 410                 return;
 411         }
 412
 413         if (flags == Update::FitCursor
 414                 || flags == (Update::Decoration | Update::FitCursor)) {
 415                 // tell the frontend to update the screen if needed.
 416                 if (fitCursor()) {
 417                         showCursor();
 418                         return;
 419                 }
 420                 if (flags & Update::Decoration) {
 421                         d->update_strategy_ = DecorationUpdate;
 422                         buffer_.changed();
 423                         return;
 424                 }
 425                 // no screen update is needed.
 426                 d->update_strategy_ = NoScreenUpdate;
 427                 return;
 428         }
 429
 430         bool const full_metrics = flags & Update::Force || !singleParUpdate();
 431
 432         if (full_metrics)
 433                 // We have to update the full screen metrics.
 434                 updateMetrics();
 435
 436         if (!(flags & Update::FitCursor)) {
 437                 // Nothing to do anymore. Trigger a redraw and return
 438                 buffer_.changed();
 439                 return;
 440         }
 441
 442         // updateMetrics() does not update paragraph position
 443         // This is done at draw() time. So we need a redraw!
 444         buffer_.changed();
 445
 446         if (fitCursor()) {
 447                 // The cursor is off screen so ensure it is visible.
 448                 // refresh it:
 449                 showCursor();
 450         }
 451 }
 452
 453
 454 void BufferView::updateScrollbar()
 455 {
 456         if (height_ == 0)
 457                 return;
 458
 459         // We prefer fixed size line scrolling.
 460         d->scrollbarParameters_.single_step = defaultRowHeight();
 461         // We prefer full screen page scrolling.
 462         d->scrollbarParameters_.page_step = height_;
 463
 464         Text & t = buffer_.text();
 465         TextMetrics & tm = d->text_metrics_[&t];
 466
 467         LYXERR(Debug::GUI, " Updating scrollbar: height: "
 468                 << t.paragraphs().size()
 469                 << " curr par: " << d->cursor_.bottom().pit()
 470                 << " default height " << defaultRowHeight());
 471
 472         size_t const parsize = t.paragraphs().size();
 473         if (d->par_height_.size() != parsize) {
 474                 d->par_height_.clear();
 475                 // FIXME: We assume a default paragraph height of 2 rows. This
 476                 // should probably be pondered with the screen width.
 477                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
 478         }
 479
 480         // Look at paragraph heights on-screen
 481         pair<pit_type, ParagraphMetrics const *> first = tm.first();
 482         pair<pit_type, ParagraphMetrics const *> last = tm.last();
 483         for (pit_type pit = first.first; pit <= last.first; ++pit) {
 484                 d->par_height_[pit] = tm.parMetrics(pit).height();
 485                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
 486                         << d->par_height_[pit]);
 487         }
 488
 489         int top_pos = first.second->position() - first.second->ascent();
 490         int bottom_pos = last.second->position() + last.second->descent();
 491         bool first_visible = first.first == 0 && top_pos >= 0;
 492         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
 493         if (first_visible && last_visible) {
 494                 d->scrollbarParameters_.min = 0;
 495                 d->scrollbarParameters_.max = 0;
 496                 return;
 497         }
 498
 499         d->scrollbarParameters_.min = top_pos;
 500         for (size_t i = 0; i != size_t(first.first); ++i)
 501                 d->scrollbarParameters_.min -= d->par_height_[i];
 502         d->scrollbarParameters_.max = bottom_pos;
 503         for (size_t i = last.first + 1; i != parsize; ++i)
 504                 d->scrollbarParameters_.max += d->par_height_[i];
 505
 506         d->scrollbarParameters_.position = 0;
 507         // The reference is the top position so we remove one page.
 508         d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 509 }
 510
 511
 512 ScrollbarParameters const & BufferView::scrollbarParameters() const
 513 {
 514         return d->scrollbarParameters_;
 515 }
 516
 517
 518 docstring BufferView::toolTip(int x, int y) const
 519 {
 520         // Get inset under mouse, if there is one.
 521         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 522         if (!covering_inset)
 523                 // No inset, no tooltip...
 524                 return docstring();
 525         return covering_inset->toolTip(*this, x, y);
 526 }
 527
 528
 529 docstring BufferView::contextMenu(int x, int y) const
 530 {
 531         // Get inset under mouse, if there is one.
 532         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 533         if (covering_inset)
 534                 return covering_inset->contextMenu(*this, x, y);
 535
 536         return buffer_.inset().contextMenu(*this, x, y);
 537 }
 538
 539
 540 void BufferView::scrollDocView(int value)
 541 {
 542         int const offset = value - d->scrollbarParameters_.position;
 543         // If the offset is less than 2 screen height, prefer to scroll instead.
 544         if (abs(offset) <= 2 * height_) {
 545                 scroll(offset);
 546                 return;
 547         }
 548
 549         // cut off at the top
 550         if (value <= d->scrollbarParameters_.min) {
 551                 DocIterator dit = doc_iterator_begin(buffer_.inset());
 552                 showCursor(dit);
 553                 LYXERR(Debug::SCROLLING, "scroll to top");
 554                 return;
 555         }
 556
 557         // cut off at the bottom
 558         if (value >= d->scrollbarParameters_.max) {
 559                 DocIterator dit = doc_iterator_end(buffer_.inset());
 560                 dit.backwardPos();
 561                 showCursor(dit);
 562                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 563                 return;
 564         }
 565
 566         // find paragraph at target position
 567         int par_pos = d->scrollbarParameters_.min;
 568         pit_type i = 0;
 569         for (; i != int(d->par_height_.size()); ++i) {
 570                 par_pos += d->par_height_[i];
 571                 if (par_pos >= value)
 572                         break;
 573         }
 574
 575         if (par_pos < value) {
 576                 // It seems we didn't find the correct pit so stay on the safe side and
 577                 // scroll to bottom.
 578                 LYXERR0("scrolling position not found!");
 579                 scrollDocView(d->scrollbarParameters_.max);
 580                 return;
 581         }
 582
 583         DocIterator dit = doc_iterator_begin(buffer_.inset());
 584         dit.pit() = i;
 585         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 586         showCursor(dit);
 587 }
 588
 589
 590 // FIXME: this method is not working well.
 591 void BufferView::setCursorFromScrollbar()
 592 {
 593         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 594
 595         int const height = 2 * defaultRowHeight();
 596         int const first = height;
 597         int const last = height_ - height;
 598         Cursor & cur = d->cursor_;
 599
 600         switch (cursorStatus(cur)) {
 601         case CUR_ABOVE:
 602                 // We reset the cursor because cursorStatus() does not
 603                 // work when the cursor is within mathed.
 604                 cur.reset(buffer_.inset());
 605                 tm.setCursorFromCoordinates(cur, 0, first);
 606                 cur.clearSelection();
 607                 break;
 608         case CUR_BELOW:
 609                 // We reset the cursor because cursorStatus() does not
 610                 // work when the cursor is within mathed.
 611                 cur.reset(buffer_.inset());
 612                 tm.setCursorFromCoordinates(cur, 0, last);
 613                 cur.clearSelection();
 614                 break;
 615         case CUR_INSIDE:
 616                 int const y = getPos(cur, cur.boundary()).y_;
 617                 int const newy = min(last, max(y, first));
 618                 if (y != newy) {
 619                         cur.reset(buffer_.inset());
 620                         tm.setCursorFromCoordinates(cur, 0, newy);
 621                 }
 622         }
 623 }
 624
 625
 626 Change const BufferView::getCurrentChange() const
 627 {
 628         if (!d->cursor_.selection())
 629                 return Change(Change::UNCHANGED);
 630
 631         DocIterator dit = d->cursor_.selectionBegin();
 632         return dit.paragraph().lookupChange(dit.pos());
 633 }
 634
 635
 636 // this could be used elsewhere as well?
 637 // FIXME: This does not work within mathed!
 638 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 639 {
 640         Point const p = getPos(dit, dit.boundary());
 641         if (p.y_ < 0)
 642                 return CUR_ABOVE;
 643         if (p.y_ > workHeight())
 644                 return CUR_BELOW;
 645         return CUR_INSIDE;
 646 }
 647
 648
 649 void BufferView::saveBookmark(unsigned int idx)
 650 {
 651         // tenatively save bookmark, id and pos will be used to
 652         // acturately locate a bookmark in a 'live' lyx session.
 653         // pit and pos will be updated with bottom level pit/pos
 654         // when lyx exits.
 655         LyX::ref().session().bookmarks().save(
 656                 buffer_.fileName(),
 657                 d->cursor_.bottom().pit(),
 658                 d->cursor_.bottom().pos(),
 659                 d->cursor_.paragraph().id(),
 660                 d->cursor_.pos(),
 661                 idx
 662         );
 663         if (idx)
 664                 // emit message signal.
 665                 message(_("Save bookmark"));
 666 }
 667
 668
 669 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 670         int top_id, pos_type top_pos)
 671 {
 672         bool success = false;
 673         DocIterator dit;
 674
 675         d->cursor_.clearSelection();
 676
 677         // if a valid par_id is given, try it first
 678         // This is the case for a 'live' bookmark when unique paragraph ID
 679         // is used to track bookmarks.
 680         if (top_id > 0) {
 681                 dit = buffer_.getParFromID(top_id);
 682                 if (!dit.atEnd()) {
 683                         dit.pos() = min(dit.paragraph().size(), top_pos);
 684                         // Some slices of the iterator may not be
 685                         // reachable (e.g. closed collapsable inset)
 686                         // so the dociterator may need to be
 687                         // shortened. Otherwise, setCursor may crash
 688                         // lyx when the cursor can not be set to these
 689                         // insets.
 690                         size_t const n = dit.depth();
 691                         for (size_t i = 0; i < n; ++i)
 692                                 if (dit[i].inset().editable() != Inset::HIGHLY_EDITABLE) {
 693                                         dit.resize(i);
 694                                         break;
 695                                 }
 696                         success = true;
 697                 }
 698         }
 699
 700         // if top_id == 0, or searching through top_id failed
 701         // This is the case for a 'restored' bookmark when only bottom
 702         // (document level) pit was saved. Because of this, bookmark
 703         // restoration is inaccurate. If a bookmark was within an inset,
 704         // it will be restored to the left of the outmost inset that contains
 705         // the bookmark.
 706         if (bottom_pit < int(buffer_.paragraphs().size())) {
 707                 dit = doc_iterator_begin(buffer_.inset());
 708
 709                 dit.pit() = bottom_pit;
 710                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 711                 success = true;
 712         }
 713
 714         if (success) {
 715                 // Note: only bottom (document) level pit is set.
 716                 setCursor(dit);
 717                 // set the current font.
 718                 d->cursor_.setCurrentFont();
 719                 // To center the screen on this new position we need the
 720                 // paragraph position which is computed at draw() time.
 721                 // So we need a redraw!
 722                 buffer_.changed();
 723                 if (fitCursor())
 724                         showCursor();
 725         }
 726
 727         return success;
 728 }
 729
 730
 731 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 732 {
 733         if (lyxrc.rtl_support) {
 734                 if (d->cursor_.real_current_font.isRightToLeft()) {
 735                         if (d->intl_.keymap == Intl::PRIMARY)
 736                                 d->intl_.keyMapSec();
 737                 } else {
 738                         if (d->intl_.keymap == Intl::SECONDARY)
 739                                 d->intl_.keyMapPrim();
 740                 }
 741         }
 742
 743         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 744 }
 745
 746
 747 int BufferView::workWidth() const
 748 {
 749         return width_;
 750 }
 751
 752
 753 void BufferView::showCursor()
 754 {
 755         showCursor(d->cursor_);
 756 }
 757
 758
 759 void BufferView::showCursor(DocIterator const & dit)
 760 {
 761         // We are not properly started yet, delay until resizing is
 762         // done.
 763         if (height_ == 0)
 764                 return;
 765
 766         LYXERR(Debug::SCROLLING, "recentering!");
 767
 768         CursorSlice const & bot = dit.bottom();
 769         TextMetrics & tm = d->text_metrics_[bot.text()];
 770
 771         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 772         int bot_pit = bot.pit();
 773         if (bot_pit > max_pit) {
 774                 // FIXME: Why does this happen?
 775                 LYXERR0("bottom pit is greater that max pit: "
 776                         << bot_pit << " > " << max_pit);
 777                 bot_pit = max_pit;
 778         }
 779
 780         if (bot_pit == tm.first().first - 1)
 781                 tm.newParMetricsUp();
 782         else if (bot_pit == tm.last().first + 1)
 783                 tm.newParMetricsDown();
 784
 785         if (tm.contains(bot_pit)) {
 786                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 787                 BOOST_ASSERT(!pm.rows().empty());
 788                 // FIXME: smooth scrolling doesn't work in mathed.
 789                 CursorSlice const & cs = dit.innerTextSlice();
 790                 int offset = coordOffset(dit, dit.boundary()).y_;
 791                 int ypos = pm.position() + offset;
 792                 Dimension const & row_dim =
 793                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 794                 if (ypos - row_dim.ascent() < 0)
 795                         scrollUp(- ypos + row_dim.ascent());
 796                 else if (ypos + row_dim.descent() > height_)
 797                         scrollDown(ypos - height_ + row_dim.descent());
 798                 // else, nothing to do, the cursor is already visible so we just return.
 799                 return;
 800         }
 801
 802         // fix inline completion position
 803         if (d->inlineCompletionPos.fixIfBroken())
 804                 d->inlineCompletionPos = DocIterator();
 805
 806         tm.redoParagraph(bot_pit);
 807         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 808         int offset = coordOffset(dit, dit.boundary()).y_;
 809
 810         d->anchor_pit_ = bot_pit;
 811         CursorSlice const & cs = dit.innerTextSlice();
 812         Dimension const & row_dim =
 813                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 814
 815         if (d->anchor_pit_ == 0)
 816                 d->anchor_ypos_ = offset + pm.ascent();
 817         else if (d->anchor_pit_ == max_pit)
 818                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
 819         else
 820                 d->anchor_ypos_ = defaultRowHeight() * 2 - offset - row_dim.descent();
 821
 822         updateMetrics();
 823         buffer_.changed();
 824 }
 825
 826
 827 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 828 {
 829         FuncStatus flag;
 830
 831         Cursor & cur = d->cursor_;
 832
 833         switch (cmd.action) {
 834
 835         case LFUN_UNDO:
 836                 flag.enabled(buffer_.undo().hasUndoStack());
 837                 break;
 838         case LFUN_REDO:
 839                 flag.enabled(buffer_.undo().hasRedoStack());
 840                 break;
 841         case LFUN_FILE_INSERT:
 842         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 843         case LFUN_FILE_INSERT_PLAINTEXT:
 844         case LFUN_BOOKMARK_SAVE:
 845                 // FIXME: Actually, these LFUNS should be moved to Text
 846                 flag.enabled(cur.inTexted());
 847                 break;
 848         case LFUN_FONT_STATE:
 849         case LFUN_LABEL_INSERT:
 850         case LFUN_INFO_INSERT:
 851         case LFUN_EXTERNAL_EDIT:
 852         case LFUN_GRAPHICS_EDIT:
 853         case LFUN_PARAGRAPH_GOTO:
 854         case LFUN_NOTE_NEXT:
 855         case LFUN_REFERENCE_NEXT:
 856         case LFUN_WORD_FIND:
 857         case LFUN_WORD_REPLACE:
 858         case LFUN_MARK_OFF:
 859         case LFUN_MARK_ON:
 860         case LFUN_MARK_TOGGLE:
 861         case LFUN_SCREEN_RECENTER:
 862         case LFUN_BIBTEX_DATABASE_ADD:
 863         case LFUN_BIBTEX_DATABASE_DEL:
 864         case LFUN_STATISTICS:
 865                 flag.enabled(true);
 866                 break;
 867
 868         case LFUN_NEXT_INSET_TOGGLE: {
 869                 // this is the real function we want to invoke
 870                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.argument());
 871                 // if there is an inset at cursor, see whether it
 872                 // can be modified.
 873                 Inset * inset = cur.nextInset();
 874                 if (inset) {
 875                         inset->getStatus(cur, tmpcmd, flag);
 876                         return flag;
 877                         break;
 878                 }
 879                 // if it did not work, try the underlying inset.
 880                 if (!inset || !cur.result().dispatched())
 881                         getStatus(tmpcmd);
 882
 883                 if (!cur.result().dispatched())
 884                         // else disable
 885                         flag.enabled(false);
 886                 break;
 887         }
 888
 889         case LFUN_NEXT_INSET_MODIFY: {
 890                 // this is the real function we want to invoke
 891                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_MODIFY, cmd.argument());
 892                 // if there is an inset at cursor, see whether it
 893                 // can be modified.
 894                 Inset * inset = cur.nextInset();
 895                 if (inset) {
 896                         inset->getStatus(cur, tmpcmd, flag);
 897                         return flag;
 898                         break;
 899                 }
 900                 // if it did not work, try the underlying inset.
 901                 if (!inset || !cur.result().dispatched())
 902                         getStatus(tmpcmd);
 903
 904                 if (!cur.result().dispatched())
 905                         // else disable
 906                         flag.enabled(false);
 907                 break;
 908         }
 909
 910         case LFUN_LABEL_GOTO: {
 911                 flag.enabled(!cmd.argument().empty()
 912                     || getInsetByCode<InsetRef>(cur, REF_CODE));
 913                 break;
 914         }
 915
 916         case LFUN_CHANGES_TRACK:
 917                 flag.enabled(true);
 918                 flag.setOnOff(buffer_.params().trackChanges);
 919                 break;
 920
 921         case LFUN_CHANGES_OUTPUT:
 922                 flag.enabled(true);
 923                 flag.setOnOff(buffer_.params().outputChanges);
 924                 break;
 925
 926         case LFUN_CHANGES_MERGE:
 927         case LFUN_CHANGE_NEXT:
 928         case LFUN_ALL_CHANGES_ACCEPT:
 929         case LFUN_ALL_CHANGES_REJECT:
 930                 // TODO: context-sensitive enabling of LFUNs
 931                 // In principle, these command should only be enabled if there
 932                 // is a change in the document. However, without proper
 933                 // optimizations, this will inevitably result in poor performance.
 934                 flag.enabled(true);
 935                 break;
 936
 937         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 938                 flag.setOnOff(buffer_.params().compressed);
 939                 break;
 940         }
 941
 942         case LFUN_BUFFER_TOGGLE_EMBEDDING: {
 943                 flag.setOnOff(buffer_.params().embedded);
 944                 break;
 945         }
 946
 947         case LFUN_SCREEN_UP:
 948         case LFUN_SCREEN_DOWN:
 949         case LFUN_SCROLL:
 950         case LFUN_SCREEN_UP_SELECT:
 951         case LFUN_SCREEN_DOWN_SELECT:
 952                 flag.enabled(true);
 953                 break;
 954
 955         case LFUN_LAYOUT_TABULAR:
 956                 flag.enabled(cur.innerInsetOfType(TABULAR_CODE));
 957                 break;
 958
 959         case LFUN_LAYOUT:
 960                 flag.enabled(!cur.inset().forceEmptyLayout(cur.idx()));
 961                 break;
 962
 963         case LFUN_LAYOUT_PARAGRAPH:
 964                 flag.enabled(cur.inset().allowParagraphCustomization(cur.idx()));
 965                 break;
 966
 967         case LFUN_INSET_SETTINGS: {
 968                 InsetCode code = cur.inset().lyxCode();
 969                 if (cur.nextInset())
 970                         code = cur.nextInset()->lyxCode();
 971                 bool enable = false;
 972                 switch (code) {
 973                         case TABULAR_CODE:
 974                         case ERT_CODE:
 975                         case FLOAT_CODE:
 976                         case WRAP_CODE:
 977                         case NOTE_CODE:
 978                         case BRANCH_CODE:
 979                         case BOX_CODE:
 980                         case LISTINGS_CODE:
 981                                 enable = (cmd.argument().empty() ||
 982                                           cmd.getArg(0) == insetName(code));
 983                                 break;
 984                         default:
 985                                 break;
 986                 }
 987                 flag.enabled(enable);
 988                 break;
 989         }
 990
 991         case LFUN_DIALOG_SHOW_NEW_INSET:
 992                 flag.enabled(cur.inset().lyxCode() != ERT_CODE &&
 993                         cur.inset().lyxCode() != LISTINGS_CODE);
 994                 if (cur.inset().lyxCode() == CAPTION_CODE) {
 995                         FuncStatus flag;
 996                         if (cur.inset().getStatus(cur, cmd, flag))
 997                                 return flag;
 998                 }
 999                 break;
1000
1001         default:
1002                 flag.enabled(false);
1003         }
1004
1005         return flag;
1006 }
1007
1008
1009 bool BufferView::dispatch(FuncRequest const & cmd)
1010 {
1011         //lyxerr << [ cmd = " << cmd << "]" << endl;
1012
1013         // Make sure that the cached BufferView is correct.
1014         LYXERR(Debug::ACTION, " action[" << cmd.action << ']'
1015                 << " arg[" << to_utf8(cmd.argument()) << ']'
1016                 << " x[" << cmd.x << ']'
1017                 << " y[" << cmd.y << ']'
1018                 << " button[" << cmd.button() << ']');
1019
1020         Cursor & cur = d->cursor_;
1021
1022         switch (cmd.action) {
1023
1024         case LFUN_UNDO:
1025                 cur.message(_("Undo"));
1026                 cur.clearSelection();
1027                 if (!cur.textUndo())
1028                         cur.message(_("No further undo information"));
1029                 else
1030                         processUpdateFlags(Update::Force | Update::FitCursor);
1031                 break;
1032
1033         case LFUN_REDO:
1034                 cur.message(_("Redo"));
1035                 cur.clearSelection();
1036                 if (!cur.textRedo())
1037                         cur.message(_("No further redo information"));
1038                 else
1039                         processUpdateFlags(Update::Force | Update::FitCursor);
1040                 break;
1041
1042         case LFUN_FONT_STATE:
1043                 cur.message(cur.currentState());
1044                 break;
1045
1046         case LFUN_BOOKMARK_SAVE:
1047                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1048                 break;
1049
1050         case LFUN_LABEL_GOTO: {
1051                 docstring label = cmd.argument();
1052                 if (label.empty()) {
1053                         InsetRef * inset =
1054                                 getInsetByCode<InsetRef>(d->cursor_,
1055                                                          REF_CODE);
1056                         if (inset) {
1057                                 label = inset->getParam("reference");
1058                                 // persistent=false: use temp_bookmark
1059                                 saveBookmark(0);
1060                         }
1061                 }
1062
1063                 if (!label.empty())
1064                         gotoLabel(label);
1065                 break;
1066         }
1067
1068         case LFUN_EXTERNAL_EDIT: {
1069                 FuncRequest fr(cmd);
1070                 InsetExternal * inset = getInsetByCode<InsetExternal>(d->cursor_,
1071                         EXTERNAL_CODE);
1072                 if (inset)
1073                         inset->dispatch(d->cursor_, fr);
1074                 break;
1075         }
1076
1077
1078         case LFUN_GRAPHICS_EDIT: {
1079                 FuncRequest fr(cmd);
1080                 InsetGraphics * inset = getInsetByCode<InsetGraphics>(d->cursor_,
1081                         GRAPHICS_CODE);
1082                 if (inset)
1083                         inset->dispatch(d->cursor_, fr);
1084                 break;
1085         }
1086
1087         case LFUN_PARAGRAPH_GOTO: {
1088                 int const id = convert<int>(to_utf8(cmd.argument()));
1089                 int i = 0;
1090                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1091                         b = theBufferList().next(b)) {
1092
1093                         DocIterator dit = b->getParFromID(id);
1094                         if (dit.atEnd()) {
1095                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1096                                 ++i;
1097                                 continue;
1098                         }
1099                         LYXERR(Debug::INFO, "Paragraph " << dit.paragraph().id()
1100                                 << " found in buffer `"
1101                                 << b->absFileName() << "'.");
1102
1103                         if (b == &buffer_) {
1104                                 // Set the cursor
1105                                 setCursor(dit);
1106                                 processUpdateFlags(Update::Force | Update::FitCursor);
1107                         } else {
1108                                 // Switch to other buffer view and resend cmd
1109                                 theLyXFunc().dispatch(FuncRequest(
1110                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1111                                 theLyXFunc().dispatch(cmd);
1112                         }
1113                         break;
1114                 }
1115                 break;
1116         }
1117
1118         case LFUN_NOTE_NEXT:
1119                 gotoInset(this, NOTE_CODE, false);
1120                 break;
1121
1122         case LFUN_REFERENCE_NEXT: {
1123                 vector<InsetCode> tmp;
1124                 tmp.push_back(LABEL_CODE);
1125                 tmp.push_back(REF_CODE);
1126                 gotoInset(this, tmp, true);
1127                 break;
1128         }
1129
1130         case LFUN_CHANGES_TRACK:
1131                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
1132                 break;
1133
1134         case LFUN_CHANGES_OUTPUT:
1135                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
1136                 if (buffer_.params().outputChanges) {
1137                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
1138                         bool xcolorsoul = LaTeXFeatures::isAvailable("soul") &&
1139                                           LaTeXFeatures::isAvailable("xcolor");
1140
1141                         if (!dvipost && !xcolorsoul) {
1142                                 Alert::warning(_("Changes not shown in LaTeX output"),
1143                                                _("Changes will not be highlighted in LaTeX output, "
1144                                                  "because neither dvipost nor xcolor/soul are installed.\n"
1145                                                  "Please install these packages or redefine "
1146                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1147                         } else if (!xcolorsoul) {
1148                                 Alert::warning(_("Changes not shown in LaTeX output"),
1149                                                _("Changes will not be highlighted in LaTeX output "
1150                                                  "when using pdflatex, because xcolor and soul are not installed.\n"
1151                                                  "Please install both packages or redefine "
1152                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1153                         }
1154                 }
1155                 break;
1156
1157         case LFUN_CHANGE_NEXT:
1158                 findNextChange(this);
1159                 break;
1160
1161         case LFUN_CHANGES_MERGE:
1162                 if (findNextChange(this))
1163                         showDialog("changes");
1164                 break;
1165
1166         case LFUN_ALL_CHANGES_ACCEPT:
1167                 // select complete document
1168                 d->cursor_.reset(buffer_.inset());
1169                 d->cursor_.selHandle(true);
1170                 buffer_.text().cursorBottom(d->cursor_);
1171                 // accept everything in a single step to support atomic undo
1172                 buffer_.text().acceptOrRejectChanges(d->cursor_, Text::ACCEPT);
1173                 break;
1174
1175         case LFUN_ALL_CHANGES_REJECT:
1176                 // select complete document
1177                 d->cursor_.reset(buffer_.inset());
1178                 d->cursor_.selHandle(true);
1179                 buffer_.text().cursorBottom(d->cursor_);
1180                 // reject everything in a single step to support atomic undo
1181                 // Note: reject does not work recursively; the user may have to repeat the operation
1182                 buffer_.text().acceptOrRejectChanges(d->cursor_, Text::REJECT);
1183                 break;
1184
1185         case LFUN_WORD_FIND:
1186                 if (find(this, cmd))
1187                         showCursor();
1188                 else
1189                         message(_("String not found!"));
1190                 break;
1191
1192         case LFUN_WORD_REPLACE: {
1193                 bool has_deleted = false;
1194                 if (cur.selection()) {
1195                         DocIterator beg = cur.selectionBegin();
1196                         DocIterator end = cur.selectionEnd();
1197                         if (beg.pit() == end.pit()) {
1198                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1199                                         if (cur.paragraph().isDeleted(p))
1200                                                 has_deleted = true;
1201                                 }
1202                         }
1203                 }
1204                 replace(this, cmd, has_deleted);
1205                 break;
1206         }
1207
1208         case LFUN_MARK_OFF:
1209                 cur.clearSelection();
1210                 cur.resetAnchor();
1211                 cur.message(from_utf8(N_("Mark off")));
1212                 break;
1213
1214         case LFUN_MARK_ON:
1215                 cur.clearSelection();
1216                 cur.mark() = true;
1217                 cur.resetAnchor();
1218                 cur.message(from_utf8(N_("Mark on")));
1219                 break;
1220
1221         case LFUN_MARK_TOGGLE:
1222                 cur.clearSelection();
1223                 if (cur.mark()) {
1224                         cur.mark() = false;
1225                         cur.message(from_utf8(N_("Mark removed")));
1226                 } else {
1227                         cur.mark() = true;
1228                         cur.message(from_utf8(N_("Mark set")));
1229                 }
1230                 cur.resetAnchor();
1231                 break;
1232
1233         case LFUN_SCREEN_RECENTER:
1234                 showCursor();
1235                 break;
1236
1237         case LFUN_BIBTEX_DATABASE_ADD: {
1238                 Cursor tmpcur = d->cursor_;
1239                 findInset(tmpcur, BIBTEX_CODE, false);
1240                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1241                                                 BIBTEX_CODE);
1242                 if (inset) {
1243                         if (inset->addDatabase(to_utf8(cmd.argument())))
1244                                 buffer_.updateBibfilesCache();
1245                 }
1246                 break;
1247         }
1248
1249         case LFUN_BIBTEX_DATABASE_DEL: {
1250                 Cursor tmpcur = d->cursor_;
1251                 findInset(tmpcur, BIBTEX_CODE, false);
1252                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1253                                                 BIBTEX_CODE);
1254                 if (inset) {
1255                         if (inset->delDatabase(to_utf8(cmd.argument())))
1256                                 buffer_.updateBibfilesCache();
1257                 }
1258                 break;
1259         }
1260
1261         case LFUN_STATISTICS: {
1262                 DocIterator from, to;
1263                 if (cur.selection()) {
1264                         from = cur.selectionBegin();
1265                         to = cur.selectionEnd();
1266                 } else {
1267                         from = doc_iterator_begin(buffer_.inset());
1268                         to = doc_iterator_end(buffer_.inset());
1269                 }
1270                 int const words = countWords(from, to);
1271                 int const chars = countChars(from, to, false);
1272                 int const chars_blanks = countChars(from, to, true);
1273                 docstring message;
1274                 if (cur.selection())
1275                         message = _("Statistics for the selection:");
1276                 else
1277                         message = _("Statistics for the document:");
1278                 message += "\n\n";
1279                 if (words != 1)
1280                         message += bformat(_("%1$d words"), words);
1281                 else
1282                         message += _("One word");
1283                 message += "\n";
1284                 if (chars_blanks != 1)
1285                         message += bformat(_("%1$d characters (including blanks)"),
1286                                           chars_blanks);
1287                 else
1288                         message += _("One character (including blanks)");
1289                 message += "\n";
1290                 if (chars != 1)
1291                         message += bformat(_("%1$d characters (excluding blanks)"),
1292                                           chars);
1293                 else
1294                         message += _("One character (excluding blanks)");
1295
1296                 Alert::information(_("Statistics"), message);
1297         }
1298                 break;
1299
1300         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1301                 // turn compression on/off
1302                 buffer_.params().compressed = !buffer_.params().compressed;
1303                 break;
1304
1305         case LFUN_BUFFER_TOGGLE_EMBEDDING: {
1306                 // turn embedding on/off
1307                 try {
1308                         buffer_.embeddedFiles().enable(!buffer_.params().embedded, buffer_, true);
1309                 } catch (ExceptionMessage const & message) {
1310                         Alert::error(message.title_, message.details_);
1311                 }
1312                 break;
1313         }
1314
1315         case LFUN_NEXT_INSET_TOGGLE: {
1316                 // this is the real function we want to invoke
1317                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
1318                 // if there is an inset at cursor, see whether it
1319                 // wants to toggle.
1320                 Inset * inset = cur.nextInset();
1321                 if (inset) {
1322                         if (inset->isActive()) {
1323                                 Cursor tmpcur = cur;
1324                                 tmpcur.pushBackward(*inset);
1325                                 inset->dispatch(tmpcur, tmpcmd);
1326                                 if (tmpcur.result().dispatched()) {
1327                                         cur.dispatched();
1328                                 }
1329                         } else if (inset->editable() == Inset::IS_EDITABLE) {
1330                                 inset->edit(cur, true);
1331                         }
1332                 }
1333                 // if it did not work, try the underlying inset.
1334                 if (!inset || !cur.result().dispatched())
1335                         cur.dispatch(tmpcmd);
1336
1337                 if (!cur.result().dispatched())
1338                         // It did not work too; no action needed.
1339                         break;
1340                 cur.clearSelection();
1341                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1342                 break;
1343         }
1344
1345         case LFUN_NEXT_INSET_MODIFY: {
1346                 // this is the real function we want to invoke
1347                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_MODIFY, cmd.argument());
1348                 // if there is an inset at cursor, see whether it
1349                 // can be modified.
1350                 Inset * inset = cur.nextInset();
1351                 if (inset)
1352                         inset->dispatch(cur, tmpcmd);
1353                 // if it did not work, try the underlying inset.
1354                 if (!inset || !cur.result().dispatched())
1355                         cur.dispatch(tmpcmd);
1356
1357                 if (!cur.result().dispatched())
1358                         // It did not work too; no action needed.
1359                         break;
1360                 cur.clearSelection();
1361                 processUpdateFlags(Update::Force | Update::FitCursor);
1362                 break;
1363         }
1364
1365         case LFUN_SCREEN_UP:
1366         case LFUN_SCREEN_DOWN: {
1367                 Point p = getPos(cur, cur.boundary());
1368                 if (p.y_ < 0 || p.y_ > height_) {
1369                         // The cursor is off-screen so recenter before proceeding.
1370                         showCursor();
1371                         p = getPos(cur, cur.boundary());
1372                 }
1373                 scroll(cmd.action == LFUN_SCREEN_UP? - height_ : height_);
1374                 cur.reset(buffer_.inset());
1375                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_);
1376                 //FIXME: what to do with cur.x_target()?
1377                 cur.finishUndo();
1378                 break;
1379         }
1380
1381         case LFUN_SCROLL:
1382                 lfunScroll(cmd);
1383                 break;
1384
1385         case LFUN_SCREEN_UP_SELECT: {
1386                 cur.selHandle(true);
1387                 if (isTopScreen()) {
1388                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1389                         cur.finishUndo();
1390                         break;
1391                 }
1392                 int y = getPos(cur, cur.boundary()).y_;
1393                 int const ymin = y - height_ + defaultRowHeight();
1394                 while (y > ymin && cur.up())
1395                         y = getPos(cur, cur.boundary()).y_;
1396
1397                 cur.finishUndo();
1398                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1399                 break;
1400         }
1401
1402         case LFUN_SCREEN_DOWN_SELECT: {
1403                 cur.selHandle(true);
1404                 if (isBottomScreen()) {
1405                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1406                         cur.finishUndo();
1407                         break;
1408                 }
1409                 int y = getPos(cur, cur.boundary()).y_;
1410                 int const ymax = y + height_ - defaultRowHeight();
1411                 while (y < ymax && cur.down())
1412                         y = getPos(cur, cur.boundary()).y_;
1413
1414                 cur.finishUndo();
1415                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1416                 break;
1417         }
1418
1419         default:
1420                 return false;
1421         }
1422
1423         return true;
1424 }
1425
1426
1427 docstring const BufferView::requestSelection()
1428 {
1429         Cursor & cur = d->cursor_;
1430
1431         if (!cur.selection()) {
1432                 d->xsel_cache_.set = false;
1433                 return docstring();
1434         }
1435
1436         if (!d->xsel_cache_.set ||
1437             cur.top() != d->xsel_cache_.cursor ||
1438             cur.anchor_.top() != d->xsel_cache_.anchor)
1439         {
1440                 d->xsel_cache_.cursor = cur.top();
1441                 d->xsel_cache_.anchor = cur.anchor_.top();
1442                 d->xsel_cache_.set = cur.selection();
1443                 return cur.selectionAsString(false);
1444         }
1445         return docstring();
1446 }
1447
1448
1449 void BufferView::clearSelection()
1450 {
1451         d->cursor_.clearSelection();
1452         // Clear the selection buffer. Otherwise a subsequent
1453         // middle-mouse-button paste would use the selection buffer,
1454         // not the more current external selection.
1455         cap::clearSelection();
1456         d->xsel_cache_.set = false;
1457         // The buffer did not really change, but this causes the
1458         // redraw we need because we cleared the selection above.
1459         buffer_.changed();
1460 }
1461
1462
1463 void BufferView::resize(int width, int height)
1464 {
1465         // Update from work area
1466         width_ = width;
1467         height_ = height;
1468
1469         // Clear the paragraph height cache.
1470         d->par_height_.clear();
1471         // Redo the metrics.
1472         updateMetrics();
1473 }
1474
1475
1476 Inset const * BufferView::getCoveringInset(Text const & text,
1477                 int x, int y) const
1478 {
1479         TextMetrics & tm = d->text_metrics_[&text];
1480         Inset * inset = tm.checkInsetHit(x, y);
1481         if (!inset)
1482                 return 0;
1483
1484         if (!inset->descendable())
1485                 // No need to go further down if the inset is not
1486                 // descendable.
1487                 return inset;
1488
1489         size_t cell_number = inset->nargs();
1490         // Check all the inner cell.
1491         for (size_t i = 0; i != cell_number; ++i) {
1492                 Text const * inner_text = inset->getText(i);
1493                 if (inner_text) {
1494                         // Try deeper.
1495                         Inset const * inset_deeper =
1496                                 getCoveringInset(*inner_text, x, y);
1497                         if (inset_deeper)
1498                                 return inset_deeper;
1499                 }
1500         }
1501
1502         return inset;
1503 }
1504
1505
1506 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
1507 {
1508         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
1509
1510         // This is only called for mouse related events including
1511         // LFUN_FILE_OPEN generated by drag-and-drop.
1512         FuncRequest cmd = cmd0;
1513
1514         Cursor old = cursor();
1515         Cursor cur(*this);
1516         cur.push(buffer_.inset());
1517         cur.selection() = d->cursor_.selection();
1518
1519         // Either the inset under the cursor or the
1520         // surrounding Text will handle this event.
1521
1522         // make sure we stay within the screen...
1523         cmd.y = min(max(cmd.y, -1), height_);
1524
1525         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1526
1527                 // Get inset under mouse, if there is one.
1528                 Inset const * covering_inset =
1529                         getCoveringInset(buffer_.text(), cmd.x, cmd.y);
1530                 if (covering_inset == d->last_inset_)
1531                         // Same inset, no need to do anything...
1532                         return;
1533
1534                 bool need_redraw = false;
1535                 // const_cast because of setMouseHover().
1536                 Inset * inset = const_cast<Inset *>(covering_inset);
1537                 if (d->last_inset_)
1538                         // Remove the hint on the last hovered inset (if any).
1539                         need_redraw |= d->last_inset_->setMouseHover(false);
1540                 if (inset)
1541                         // Highlighted the newly hovered inset (if any).
1542                         need_redraw |= inset->setMouseHover(true);
1543                 d->last_inset_ = inset;
1544                 if (!need_redraw)
1545                         return;
1546
1547                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
1548                         << cmd.x << ", " << cmd.y << ")");
1549
1550                 d->update_strategy_ = DecorationUpdate;
1551
1552                 // This event (moving without mouse click) is not passed further.
1553                 // This should be changed if it is further utilized.
1554                 buffer_.changed();
1555                 return;
1556         }
1557
1558         // Build temporary cursor.
1559         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x, cmd.y);
1560
1561         // Put anchor at the same position.
1562         cur.resetAnchor();
1563
1564         // Try to dispatch to an non-editable inset near this position
1565         // via the temp cursor. If the inset wishes to change the real
1566         // cursor it has to do so explicitly by using
1567         //  cur.bv().cursor() = cur;  (or similar)
1568         if (inset)
1569                 inset->dispatch(cur, cmd);
1570
1571         // Now dispatch to the temporary cursor. If the real cursor should
1572         // be modified, the inset's dispatch has to do so explicitly.
1573         if (!inset || !cur.result().dispatched())
1574                 cur.dispatch(cmd);
1575
1576         // Notify left insets
1577         if (cur != old) {
1578                 old.fixIfBroken();
1579                 bool badcursor = notifyCursorLeaves(old, cur);
1580                 if (badcursor)
1581                         cursor().fixIfBroken();
1582         }
1583
1584         // Do we have a selection?
1585         theSelection().haveSelection(cursor().selection());
1586
1587         // If the command has been dispatched,
1588         if (cur.result().dispatched() || cur.result().update())
1589                 processUpdateFlags(cur.result().update());
1590 }
1591
1592
1593 void BufferView::lfunScroll(FuncRequest const & cmd)
1594 {
1595         string const scroll_type = cmd.getArg(0);
1596         int const scroll_step =
1597                 (scroll_type == "line")? d->scrollbarParameters_.single_step
1598                 : (scroll_type == "page")? d->scrollbarParameters_.page_step : 0;
1599         if (scroll_step == 0)
1600                 return;
1601         string const scroll_quantity = cmd.getArg(1);
1602         if (scroll_quantity == "up")
1603                 scrollUp(scroll_step);
1604         else if (scroll_quantity == "down")
1605                 scrollDown(scroll_step);
1606         else {
1607                 int const scroll_value = convert<int>(scroll_quantity);
1608                 if (scroll_value)
1609                         scroll(scroll_step * scroll_value);
1610         }
1611 }
1612
1613
1614 void BufferView::scroll(int y)
1615 {
1616         if (y > 0)
1617                 scrollDown(y);
1618         else if (y < 0)
1619                 scrollUp(-y);
1620 }
1621
1622
1623 void BufferView::scrollDown(int offset)
1624 {
1625         Text * text = &buffer_.text();
1626         TextMetrics & tm = d->text_metrics_[text];
1627         int ymax = height_ + offset;
1628         while (true) {
1629                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
1630                 int bottom_pos = last.second->position() + last.second->descent();
1631                 if (last.first + 1 == int(text->paragraphs().size())) {
1632                         if (bottom_pos <= height_)
1633                                 return;
1634                         offset = min(offset, bottom_pos - height_);
1635                         break;
1636                 }
1637                 if (bottom_pos > ymax)
1638                         break;
1639                 tm.newParMetricsDown();
1640         }
1641         d->anchor_ypos_ -= offset;
1642         updateMetrics();
1643         buffer_.changed();
1644 }
1645
1646
1647 void BufferView::scrollUp(int offset)
1648 {
1649         Text * text = &buffer_.text();
1650         TextMetrics & tm = d->text_metrics_[text];
1651         int ymin = - offset;
1652         while (true) {
1653                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
1654                 int top_pos = first.second->position() - first.second->ascent();
1655                 if (first.first == 0) {
1656                         if (top_pos >= 0)
1657                                 return;
1658                         offset = min(offset, - top_pos);
1659                         break;
1660                 }
1661                 if (top_pos < ymin)
1662                         break;
1663                 tm.newParMetricsUp();
1664         }
1665         d->anchor_ypos_ += offset;
1666         updateMetrics();
1667         buffer_.changed();
1668 }
1669
1670
1671 void BufferView::setCursorFromRow(int row)
1672 {
1673         int tmpid = -1;
1674         int tmppos = -1;
1675
1676         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
1677
1678         d->cursor_.reset(buffer_.inset());
1679         if (tmpid == -1)
1680                 buffer_.text().setCursor(d->cursor_, 0, 0);
1681         else
1682                 buffer_.text().setCursor(d->cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
1683 }
1684
1685
1686 void BufferView::gotoLabel(docstring const & label)
1687 {
1688         Toc & toc = buffer().tocBackend().toc("label");
1689         TocIterator toc_it = toc.begin();
1690         TocIterator end = toc.end();
1691         for (; toc_it != end; ++toc_it) {
1692                 if (label == toc_it->str())
1693                         dispatch(toc_it->action());
1694         }
1695         //FIXME: We could do a bit more searching thanks to this:
1696         //InsetLabel const * inset = buffer_.insetLabel(label);
1697 }
1698
1699
1700 TextMetrics const & BufferView::textMetrics(Text const * t) const
1701 {
1702         return const_cast<BufferView *>(this)->textMetrics(t);
1703 }
1704
1705
1706 TextMetrics & BufferView::textMetrics(Text const * t)
1707 {
1708         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
1709         if (tmc_it == d->text_metrics_.end()) {
1710                 tmc_it = d->text_metrics_.insert(
1711                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
1712         }
1713         return tmc_it->second;
1714 }
1715
1716
1717 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
1718                 pit_type pit) const
1719 {
1720         return textMetrics(t).parMetrics(pit);
1721 }
1722
1723
1724 int BufferView::workHeight() const
1725 {
1726         return height_;
1727 }
1728
1729
1730 void BufferView::setCursor(DocIterator const & dit)
1731 {
1732         size_t const n = dit.depth();
1733         for (size_t i = 0; i < n; ++i)
1734                 dit[i].inset().edit(d->cursor_, true);
1735
1736         d->cursor_.setCursor(dit);
1737         d->cursor_.selection() = false;
1738 }
1739
1740
1741 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
1742 {
1743         // Would be wrong to delete anything if we have a selection.
1744         if (cur.selection())
1745                 return false;
1746
1747         bool need_anchor_change = false;
1748         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1749                 need_anchor_change);
1750
1751         if (need_anchor_change)
1752                 cur.resetAnchor();
1753
1754         if (!changed)
1755                 return false;
1756
1757         d->cursor_ = cur;
1758
1759         updateLabels(buffer_);
1760
1761         updateMetrics();
1762         buffer_.changed();
1763         return true;
1764 }
1765
1766
1767 bool BufferView::mouseSetCursor(Cursor & cur, bool select)
1768 {
1769         BOOST_ASSERT(&cur.bv() == this);
1770
1771         if (!select)
1772                 // this event will clear selection so we save selection for
1773                 // persistent selection
1774                 cap::saveSelection(cursor());
1775
1776         // Has the cursor just left the inset?
1777         bool badcursor = false;
1778         bool leftinset = (&d->cursor_.inset() != &cur.inset());
1779         if (leftinset) {
1780                 d->cursor_.fixIfBroken();
1781                 badcursor = notifyCursorLeaves(d->cursor_, cur);
1782                 if (badcursor)
1783                         cur.fixIfBroken();
1784         }
1785
1786         // FIXME: shift-mouse selection doesn't work well across insets.
1787         bool do_selection = select && &d->cursor_.anchor().inset() == &cur.inset();
1788
1789         // do the dEPM magic if needed
1790         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
1791         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
1792         // the leftinset bool would not be necessary (badcursor instead).
1793         bool update = leftinset;
1794         if (!do_selection && !badcursor && d->cursor_.inTexted())
1795                 update |= checkDepm(cur, d->cursor_);
1796
1797         d->cursor_.setCursor(cur);
1798         d->cursor_.boundary(cur.boundary());
1799         if (do_selection)
1800                 d->cursor_.setSelection();
1801         else
1802                 d->cursor_.clearSelection();
1803
1804         d->cursor_.finishUndo();
1805         d->cursor_.setCurrentFont();
1806         return update;
1807 }
1808
1809
1810 void BufferView::putSelectionAt(DocIterator const & cur,
1811                                 int length, bool backwards)
1812 {
1813         d->cursor_.clearSelection();
1814
1815         setCursor(cur);
1816
1817         if (length) {
1818                 if (backwards) {
1819                         d->cursor_.pos() += length;
1820                         d->cursor_.setSelection(d->cursor_, -length);
1821                 } else
1822                         d->cursor_.setSelection(d->cursor_, length);
1823         }
1824         // Ensure a redraw happens in any case because the new selection could
1825         // possibly be on the same screen as the previous selection.
1826         processUpdateFlags(Update::Force | Update::FitCursor);
1827 }
1828
1829
1830 Cursor & BufferView::cursor()
1831 {
1832         return d->cursor_;
1833 }
1834
1835
1836 Cursor const & BufferView::cursor() const
1837 {
1838         return d->cursor_;
1839 }
1840
1841
1842 pit_type BufferView::anchor_ref() const
1843 {
1844         return d->anchor_pit_;
1845 }
1846
1847
1848 bool BufferView::singleParUpdate()
1849 {
1850         Text & buftext = buffer_.text();
1851         pit_type const bottom_pit = d->cursor_.bottom().pit();
1852         TextMetrics & tm = textMetrics(&buftext);
1853         int old_height = tm.parMetrics(bottom_pit).height();
1854
1855         // make sure inline completion pointer is ok
1856         if (d->inlineCompletionPos.fixIfBroken())
1857                 d->inlineCompletionPos = DocIterator();
1858
1859         // In Single Paragraph mode, rebreak only
1860         // the (main text, not inset!) paragraph containing the cursor.
1861         // (if this paragraph contains insets etc., rebreaking will
1862         // recursively descend)
1863         tm.redoParagraph(bottom_pit);
1864         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
1865         if (pm.height() != old_height)
1866                 // Paragraph height has changed so we cannot proceed to
1867                 // the singlePar optimisation.
1868                 return false;
1869
1870         d->update_strategy_ = SingleParUpdate;
1871
1872         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
1873                 << " y2: " << pm.position() + pm.descent()
1874                 << " pit: " << bottom_pit
1875                 << " singlepar: 1");
1876         return true;
1877 }
1878
1879
1880 void BufferView::updateMetrics()
1881 {
1882         Text & buftext = buffer_.text();
1883         pit_type const npit = int(buftext.paragraphs().size());
1884
1885         // Clear out the position cache in case of full screen redraw,
1886         d->coord_cache_.clear();
1887
1888         // Clear out paragraph metrics to avoid having invalid metrics
1889         // in the cache from paragraphs not relayouted below
1890         // The complete text metrics will be redone.
1891         d->text_metrics_.clear();
1892
1893         TextMetrics & tm = textMetrics(&buftext);
1894
1895         // make sure inline completion pointer is ok
1896         if (d->inlineCompletionPos.fixIfBroken())
1897                 d->inlineCompletionPos = DocIterator();
1898
1899         if (d->anchor_pit_ >= npit)
1900                 // The anchor pit must have been deleted...
1901                 d->anchor_pit_ = npit - 1;
1902
1903         // Rebreak anchor paragraph.
1904         tm.redoParagraph(d->anchor_pit_);
1905         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
1906
1907         // position anchor
1908         if (d->anchor_pit_ == 0) {
1909                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
1910
1911                 // Complete buffer visible? Then it's easy.
1912                 if (scrollRange == 0)
1913                         d->anchor_ypos_ = anchor_pm.ascent();
1914
1915                 // FIXME: Some clever handling needed to show
1916                 // the _first_ paragraph up to the top if the cursor is
1917                 // in the first line.
1918         }
1919         anchor_pm.setPosition(d->anchor_ypos_);
1920
1921         LYXERR(Debug::PAINTING, "metrics: "
1922                 << " anchor pit = " << d->anchor_pit_
1923                 << " anchor ypos = " << d->anchor_ypos_);
1924
1925         // Redo paragraphs above anchor if necessary.
1926         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
1927         // We are now just above the anchor paragraph.
1928         pit_type pit1 = d->anchor_pit_ - 1;
1929         for (; pit1 >= 0 && y1 >= 0; --pit1) {
1930                 tm.redoParagraph(pit1);
1931                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
1932                 y1 -= pm.descent();
1933                 // Save the paragraph position in the cache.
1934                 pm.setPosition(y1);
1935                 y1 -= pm.ascent();
1936         }
1937
1938         // Redo paragraphs below the anchor if necessary.
1939         int y2 = d->anchor_ypos_ + anchor_pm.descent();
1940         // We are now just below the anchor paragraph.
1941         pit_type pit2 = d->anchor_pit_ + 1;
1942         for (; pit2 < npit && y2 <= height_; ++pit2) {
1943                 tm.redoParagraph(pit2);
1944                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
1945                 y2 += pm.ascent();
1946                 // Save the paragraph position in the cache.
1947                 pm.setPosition(y2);
1948                 y2 += pm.descent();
1949         }
1950
1951         LYXERR(Debug::PAINTING, "Metrics: "
1952                 << " anchor pit = " << d->anchor_pit_
1953                 << " anchor ypos = " << d->anchor_ypos_
1954                 << " y1 = " << y1
1955                 << " y2 = " << y2
1956                 << " pit1 = " << pit1
1957                 << " pit2 = " << pit2);
1958
1959         d->update_strategy_ = FullScreenUpdate;
1960
1961         if (lyxerr.debugging(Debug::WORKAREA)) {
1962                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
1963                 d->coord_cache_.dump();
1964         }
1965 }
1966
1967
1968 void BufferView::insertLyXFile(FileName const & fname)
1969 {
1970         BOOST_ASSERT(d->cursor_.inTexted());
1971
1972         // Get absolute path of file and add ".lyx"
1973         // to the filename if necessary
1974         FileName filename = fileSearch(string(), fname.absFilename(), "lyx");
1975
1976         docstring const disp_fn = makeDisplayPath(filename.absFilename());
1977         // emit message signal.
1978         message(bformat(_("Inserting document %1$s..."), disp_fn));
1979
1980         docstring res;
1981         Buffer buf("", false);
1982         if (buf.loadLyXFile(filename)) {
1983                 ErrorList & el = buffer_.errorList("Parse");
1984                 // Copy the inserted document error list into the current buffer one.
1985                 el = buf.errorList("Parse");
1986                 buffer_.undo().recordUndo(d->cursor_);
1987                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
1988                                              buf.params().documentClassPtr(), el);
1989                 res = _("Document %1$s inserted.");
1990         } else {
1991                 res = _("Could not insert document %1$s");
1992         }
1993
1994         updateMetrics();
1995         buffer_.changed();
1996         // emit message signal.
1997         message(bformat(res, disp_fn));
1998         buffer_.errors("Parse");
1999 }
2000
2001
2002 Point BufferView::coordOffset(DocIterator const & dit, bool boundary) const
2003 {
2004         int x = 0;
2005         int y = 0;
2006         int lastw = 0;
2007
2008         // Addup contribution of nested insets, from inside to outside,
2009         // keeping the outer paragraph for a special handling below
2010         for (size_t i = dit.depth() - 1; i >= 1; --i) {
2011                 CursorSlice const & sl = dit[i];
2012                 int xx = 0;
2013                 int yy = 0;
2014
2015                 // get relative position inside sl.inset()
2016                 sl.inset().cursorPos(*this, sl, boundary && (i + 1 == dit.depth()), xx, yy);
2017
2018                 // Make relative position inside of the edited inset relative to sl.inset()
2019                 x += xx;
2020                 y += yy;
2021
2022                 // In case of an RTL inset, the edited inset will be positioned to the left
2023                 // of xx:yy
2024                 if (sl.text()) {
2025                         bool boundary_i = boundary && i + 1 == dit.depth();
2026                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
2027                         if (rtl)
2028                                 x -= lastw;
2029                 }
2030
2031                 // remember width for the case that sl.inset() is positioned in an RTL inset
2032                 if (i && dit[i - 1].text()) {
2033                         // If this Inset is inside a Text Inset, retrieve the Dimension
2034                         // from the containing text instead of using Inset::dimension() which
2035                         // might not be implemented.
2036                         // FIXME (Abdel 23/09/2007): this is a bit messy because of the
2037                         // elimination of Inset::dim_ cache. This coordOffset() method needs
2038                         // to be rewritten in light of the new design.
2039                         Dimension const & dim = parMetrics(dit[i - 1].text(),
2040                                 dit[i - 1].pit()).insetDimension(&sl.inset());
2041                         lastw = dim.wid;
2042                 } else {
2043                         Dimension const dim = sl.inset().dimension(*this);
2044                         lastw = dim.wid;
2045                 }
2046
2047                 //lyxerr << "Cursor::getPos, i: "
2048                 // << i << " x: " << xx << " y: " << y << endl;
2049         }
2050
2051         // Add contribution of initial rows of outermost paragraph
2052         CursorSlice const & sl = dit[0];
2053         TextMetrics const & tm = textMetrics(sl.text());
2054         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
2055         BOOST_ASSERT(!pm.rows().empty());
2056         y -= pm.rows()[0].ascent();
2057 #if 1
2058         // FIXME: document this mess
2059         size_t rend;
2060         if (sl.pos() > 0 && dit.depth() == 1) {
2061                 int pos = sl.pos();
2062                 if (pos && boundary)
2063                         --pos;
2064 //              lyxerr << "coordOffset: boundary:" << boundary << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
2065                 rend = pm.pos2row(pos);
2066         } else
2067                 rend = pm.pos2row(sl.pos());
2068 #else
2069         size_t rend = pm.pos2row(sl.pos());
2070 #endif
2071         for (size_t rit = 0; rit != rend; ++rit)
2072                 y += pm.rows()[rit].height();
2073         y += pm.rows()[rend].ascent();
2074
2075         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2076
2077         // Make relative position from the nested inset now bufferview absolute.
2078         int xx = bottom_tm.cursorX(dit.bottom(), boundary && dit.depth() == 1);
2079         x += xx;
2080
2081         // In the RTL case place the nested inset at the left of the cursor in
2082         // the outer paragraph
2083         bool boundary_1 = boundary && 1 == dit.depth();
2084         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2085         if (rtl)
2086                 x -= lastw;
2087
2088         return Point(x, y);
2089 }
2090
2091
2092 Point BufferView::getPos(DocIterator const & dit, bool boundary) const
2093 {
2094         CursorSlice const & bot = dit.bottom();
2095         TextMetrics const & tm = textMetrics(bot.text());
2096         if (!tm.contains(bot.pit()))
2097                 return Point(-1, -1);
2098
2099         Point p = coordOffset(dit, boundary); // offset from outer paragraph
2100         p.y_ += tm.parMetrics(bot.pit()).position();
2101         return p;
2102 }
2103
2104
2105 void BufferView::draw(frontend::Painter & pain)
2106 {
2107         LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
2108         Text & text = buffer_.text();
2109         TextMetrics const & tm = d->text_metrics_[&text];
2110         int const y = tm.first().second->position();
2111         PainterInfo pi(this, pain);
2112
2113         switch (d->update_strategy_) {
2114
2115         case NoScreenUpdate:
2116                 // If no screen painting is actually needed, only some the different
2117                 // coordinates of insets and paragraphs needs to be updated.
2118                 pi.full_repaint = true;
2119                 pi.pain.setDrawingEnabled(false);
2120                 tm.draw(pi, 0, y);
2121                 break;
2122
2123         case SingleParUpdate:
2124                 pi.full_repaint = false;
2125                 // In general, only the current row of the outermost paragraph
2126                 // will be redrawn. Particular cases where selection spans
2127                 // multiple paragraph are correctly detected in TextMetrics.
2128                 tm.draw(pi, 0, y);
2129                 break;
2130
2131         case DecorationUpdate:
2132                 // FIXME: We should also distinguish DecorationUpdate to avoid text
2133                 // drawing if possible. This is not possible to do easily right now
2134                 // because of the single backing pixmap.
2135
2136         case FullScreenUpdate:
2137                 // The whole screen, including insets, will be refreshed.
2138                 pi.full_repaint = true;
2139
2140                 // Clear background.
2141                 pain.fillRectangle(0, 0, width_, height_,
2142                         buffer_.inset().backgroundColor());
2143
2144                 // Draw everything.
2145                 tm.draw(pi, 0, y);
2146
2147                 // and possibly grey out below
2148                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2149                 int const y2 = lastpm.second->position() + lastpm.second->descent();
2150                 if (y2 < height_)
2151                         pain.fillRectangle(0, y2, width_, height_ - y2, Color_bottomarea);
2152                 break;
2153         }
2154         LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
2155
2156         // The scrollbar needs an update.
2157         updateScrollbar();
2158
2159         // Normalize anchor for next time
2160         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
2161         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2162         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
2163                 ParagraphMetrics const & pm = tm.parMetrics(pit);
2164                 if (pm.position() + pm.descent() > 0) {
2165                         d->anchor_pit_ = pit;
2166                         d->anchor_ypos_ = pm.position();
2167                         break;
2168                 }
2169         }
2170         LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
2171                 << "  anchor ypos = " << d->anchor_ypos_);
2172 }
2173
2174
2175 void BufferView::message(docstring const & msg)
2176 {
2177         if (d->gui_)
2178                 d->gui_->message(msg);
2179 }
2180
2181
2182 void BufferView::showDialog(string const & name)
2183 {
2184         if (d->gui_)
2185                 d->gui_->showDialog(name, string());
2186 }
2187
2188
2189 void BufferView::showDialog(string const & name,
2190         string const & data, Inset * inset)
2191 {
2192         if (d->gui_)
2193                 d->gui_->showDialog(name, data, inset);
2194 }
2195
2196
2197 void BufferView::updateDialog(string const & name, string const & data)
2198 {
2199         if (d->gui_)
2200                 d->gui_->updateDialog(name, data);
2201 }
2202
2203
2204 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
2205 {
2206         d->gui_ = gui;
2207 }
2208
2209
2210 // FIXME: Move this out of BufferView again
2211 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
2212 {
2213         if (!fname.isReadableFile()) {
2214                 docstring const error = from_ascii(strerror(errno));
2215                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2216                 docstring const text =
2217                   bformat(_("Could not read the specified document\n"
2218                             "%1$s\ndue to the error: %2$s"), file, error);
2219                 Alert::error(_("Could not read file"), text);
2220                 return docstring();
2221         }
2222
2223         if (!fname.isReadableFile()) {
2224                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2225                 docstring const text =
2226                   bformat(_("%1$s\n is not readable."), file);
2227                 Alert::error(_("Could not open file"), text);
2228                 return docstring();
2229         }
2230
2231         // FIXME UNICODE: We don't know the encoding of the file
2232         docstring file_content = fname.fileContents("UTF-8");
2233         if (file_content.empty()) {
2234                 Alert::error(_("Reading not UTF-8 encoded file"),
2235                              _("The file is not UTF-8 encoded.\n"
2236                                "It will be read as local 8Bit-encoded.\n"
2237                                "If this does not give the correct result\n"
2238                                "then please change the encoding of the file\n"
2239                                "to UTF-8 with a program other than LyX.\n"));
2240                 file_content = fname.fileContents("local8bit");
2241         }
2242
2243         return normalize_c(file_content);
2244 }
2245
2246
2247 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
2248 {
2249         docstring const tmpstr = contentsOfPlaintextFile(f);
2250
2251         if (tmpstr.empty())
2252                 return;
2253
2254         Cursor & cur = cursor();
2255         cap::replaceSelection(cur);
2256         buffer_.undo().recordUndo(cur);
2257         if (asParagraph)
2258                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr);
2259         else
2260                 cur.innerText()->insertStringAsLines(cur, tmpstr);
2261
2262         updateMetrics();
2263         buffer_.changed();
2264 }
2265
2266
2267 docstring const & BufferView::inlineCompletion() const
2268 {
2269         return d->inlineCompletion;
2270 }
2271
2272
2273 size_t const & BufferView::inlineCompletionUniqueChars() const
2274 {
2275         return d->inlineCompletionUniqueChars;
2276 }
2277
2278
2279 DocIterator const & BufferView::inlineCompletionPos() const
2280 {
2281         return d->inlineCompletionPos;
2282 }
2283
2284
2285 bool samePar(DocIterator const & a, DocIterator const & b)
2286 {
2287         if (a.empty() && b.empty())
2288                 return true;
2289         if (a.empty() || b.empty())
2290                 return false;
2291         return &a.innerParagraph() == &b.innerParagraph();
2292 }
2293
2294
2295 void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
2296         docstring const & completion, size_t uniqueChars)
2297 {
2298         uniqueChars = min(completion.size(), uniqueChars);
2299         bool changed = d->inlineCompletion != completion
2300                 || d->inlineCompletionUniqueChars != uniqueChars;
2301         bool singlePar = true;
2302         d->inlineCompletion = completion;
2303         d->inlineCompletionUniqueChars = min(completion.size(), uniqueChars);
2304
2305         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
2306
2307         // at new position?
2308         DocIterator const & old = d->inlineCompletionPos;
2309         if (old != pos) {
2310                 //lyxerr << "inlineCompletionPos changed" << std::endl;
2311                 // old or pos are in another paragraph?
2312                 if ((!samePar(cur, pos) && !pos.empty())
2313                     || (!samePar(cur, old) && !old.empty())) {
2314                         singlePar = false;
2315                         //lyxerr << "different paragraph" << std::endl;
2316                 }
2317                 d->inlineCompletionPos = pos;
2318         }
2319
2320         // set update flags
2321         if (changed) {
2322                 if (singlePar && !(cur.disp_.update() & Update::Force))
2323                         cur.updateFlags(cur.disp_.update() | Update::SinglePar);
2324                 else
2325                         cur.updateFlags(cur.disp_.update() | Update::Force);
2326         }
2327 }
2328
2329 } // namespace lyx