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 "VSpace.h"
  53 #include "WordLangTuple.h"
  54
  55 #include "insets/InsetBibtex.h"
  56 #include "insets/InsetCommand.h" // ChangeRefs
  57 #include "insets/InsetRef.h"
  58 #include "insets/InsetText.h"
  59
  60 #include "frontends/alert.h"
  61 #include "frontends/Application.h"
  62 #include "frontends/Delegates.h"
  63 #include "frontends/FontMetrics.h"
  64 #include "frontends/Painter.h"
  65 #include "frontends/Selection.h"
  66
  67 #include "graphics/Previews.h"
  68
  69 #include "support/convert.h"
  70 #include "support/debug.h"
  71 #include "support/ExceptionMessage.h"
  72 #include "support/filetools.h"
  73 #include "support/gettext.h"
  74 #include "support/lstrings.h"
  75 #include "support/Package.h"
  76 #include "support/types.h"
  77
  78 #include <cerrno>
  79 #include <fstream>
  80 #include <functional>
  81 #include <iterator>
  82 #include <vector>
  83
  84 using namespace std;
  85 using namespace lyx::support;
  86
  87 namespace lyx {
  88
  89 namespace Alert = frontend::Alert;
  90
  91 namespace {
  92
  93 /// Return an inset of this class if it exists at the current cursor position
  94 template <class T>
  95 T * getInsetByCode(Cursor const & cur, InsetCode code)
  96 {
  97         DocIterator it = cur;
  98         Inset * inset = it.nextInset();
  99         if (inset && inset->lyxCode() == code)
 100                 return static_cast<T*>(inset);
 101         return 0;
 102 }
 103
 104
 105 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 106         bool same_content);
 107
 108 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 109         docstring const & contents)
 110 {
 111         DocIterator tmpdit = dit;
 112
 113         while (tmpdit) {
 114                 Inset const * inset = tmpdit.nextInset();
 115                 if (inset
 116                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()
 117                     && (contents.empty() ||
 118                     static_cast<InsetCommand const *>(inset)->getFirstNonOptParam() == contents)) {
 119                         dit = tmpdit;
 120                         return true;
 121                 }
 122                 tmpdit.forwardInset();
 123         }
 124
 125         return false;
 126 }
 127
 128
 129 /// Looks for next inset with one of the given codes.
 130 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 131         bool same_content)
 132 {
 133         docstring contents;
 134         DocIterator tmpdit = dit;
 135         tmpdit.forwardInset();
 136         if (!tmpdit)
 137                 return false;
 138
 139         if (same_content) {
 140                 Inset const * inset = tmpdit.nextInset();
 141                 if (inset
 142                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()) {
 143                         contents = static_cast<InsetCommand const *>(inset)->getFirstNonOptParam();
 144                 }
 145         }
 146
 147         if (!findNextInset(tmpdit, codes, contents)) {
 148                 if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
 149                         tmpdit  = doc_iterator_begin(tmpdit.bottom().inset());
 150                         if (!findNextInset(tmpdit, codes, contents))
 151                                 return false;
 152                 } else
 153                         return false;
 154         }
 155
 156         dit = tmpdit;
 157         return true;
 158 }
 159
 160
 161 /// Looks for next inset with the given code
 162 void findInset(DocIterator & dit, InsetCode code, bool same_content)
 163 {
 164         findInset(dit, vector<InsetCode>(1, code), same_content);
 165 }
 166
 167
 168 /// Moves cursor to the next inset with one of the given codes.
 169 void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
 170                bool same_content)
 171 {
 172         Cursor tmpcur = bv->cursor();
 173         if (!findInset(tmpcur, codes, same_content)) {
 174                 bv->cursor().message(_("No more insets"));
 175                 return;
 176         }
 177
 178         tmpcur.clearSelection();
 179         bv->setCursor(tmpcur);
 180         bv->showCursor();
 181 }
 182
 183
 184 /// Moves cursor to the next inset with given code.
 185 void gotoInset(BufferView * bv, InsetCode code, bool same_content)
 186 {
 187         gotoInset(bv, vector<InsetCode>(1, code), same_content);
 188 }
 189
 190
 191 /// A map from a Text to the associated text metrics
 192 typedef map<Text const *, TextMetrics> TextMetricsCache;
 193
 194 enum ScreenUpdateStrategy {
 195         NoScreenUpdate,
 196         SingleParUpdate,
 197         FullScreenUpdate,
 198         DecorationUpdate
 199 };
 200
 201 } // anon namespace
 202
 203
 204 /////////////////////////////////////////////////////////////////////
 205 //
 206 // BufferView
 207 //
 208 /////////////////////////////////////////////////////////////////////
 209
 210 struct BufferView::Private
 211 {
 212         Private(BufferView & bv): wh_(0), cursor_(bv),
 213                 anchor_pit_(0), anchor_ypos_(0),
 214                 last_inset_(0), gui_(0)
 215         {}
 216
 217         ///
 218         ScrollbarParameters scrollbarParameters_;
 219         ///
 220         ScreenUpdateStrategy update_strategy_;
 221         ///
 222         CoordCache coord_cache_;
 223
 224         /// Estimated average par height for scrollbar.
 225         int wh_;
 226         /// this is used to handle XSelection events in the right manner.
 227         struct {
 228                 CursorSlice cursor;
 229                 CursorSlice anchor;
 230                 bool set;
 231         } xsel_cache_;
 232         ///
 233         Cursor cursor_;
 234         ///
 235         pit_type anchor_pit_;
 236         ///
 237         int anchor_ypos_;
 238         ///
 239         vector<int> par_height_;
 240
 241         /// keyboard mapping object.
 242         Intl intl_;
 243
 244         /// last visited inset.
 245         /** kept to send setMouseHover(false).
 246           * Not owned, so don't delete.
 247           */
 248         Inset * last_inset_;
 249
 250         mutable TextMetricsCache text_metrics_;
 251
 252         /// Whom to notify.
 253         /** Not owned, so don't delete.
 254           */
 255         frontend::GuiBufferViewDelegate * gui_;
 256 };
 257
 258
 259 BufferView::BufferView(Buffer & buf)
 260         : width_(0), height_(0), full_screen_(false), buffer_(buf), d(new Private(*this))
 261 {
 262         d->xsel_cache_.set = false;
 263         d->intl_.initKeyMapper(lyxrc.use_kbmap);
 264
 265         d->cursor_.push(buffer_.inset());
 266         d->cursor_.resetAnchor();
 267         d->cursor_.setCurrentFont();
 268
 269         if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 270                 graphics::Previews::get().generateBufferPreviews(buffer_);
 271 }
 272
 273
 274 BufferView::~BufferView()
 275 {
 276         // current buffer is going to be switched-off, save cursor pos
 277         // Ideally, the whole cursor stack should be saved, but session
 278         // currently can only handle bottom (whole document) level pit and pos.
 279         // That is to say, if a cursor is in a nested inset, it will be
 280         // restore to the left of the top level inset.
 281         LastFilePosSection::FilePos fp;
 282         fp.pit = d->cursor_.bottom().pit();
 283         fp.pos = d->cursor_.bottom().pos();
 284         LyX::ref().session().lastFilePos().save(buffer_.fileName(), fp);
 285
 286         delete d;
 287 }
 288
 289
 290 int BufferView::rightMargin() const
 291 {
 292         // The additional test for the case the outliner is opened.
 293         if (!full_screen_ ||
 294                 !lyxrc.full_screen_limit ||
 295                 width_ < lyxrc.full_screen_width + 20)
 296                         return 10;
 297
 298         return (width_ - lyxrc.full_screen_width) / 2;
 299 }
 300
 301
 302 int BufferView::leftMargin() const
 303 {
 304         return rightMargin();
 305 }
 306
 307
 308 Intl & BufferView::getIntl()
 309 {
 310         return d->intl_;
 311 }
 312
 313
 314 Intl const & BufferView::getIntl() const
 315 {
 316         return d->intl_;
 317 }
 318
 319
 320 CoordCache & BufferView::coordCache()
 321 {
 322         return d->coord_cache_;
 323 }
 324
 325
 326 CoordCache const & BufferView::coordCache() const
 327 {
 328         return d->coord_cache_;
 329 }
 330
 331
 332 Buffer & BufferView::buffer()
 333 {
 334         return buffer_;
 335 }
 336
 337
 338 Buffer const & BufferView::buffer() const
 339 {
 340         return buffer_;
 341 }
 342
 343
 344 bool BufferView::fitCursor()
 345 {
 346         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
 347                 frontend::FontMetrics const & fm =
 348                         theFontMetrics(d->cursor_.getFont().fontInfo());
 349                 int const asc = fm.maxAscent();
 350                 int const des = fm.maxDescent();
 351                 Point const p = getPos(d->cursor_, d->cursor_.boundary());
 352                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 353                         return false;
 354         }
 355         return true;
 356 }
 357
 358
 359 void BufferView::processUpdateFlags(Update::flags flags)
 360 {
 361         // last_inset_ points to the last visited inset. This pointer may become
 362         // invalid because of keyboard editing. Since all such operations
 363         // causes screen update(), I reset last_inset_ to avoid such a problem.
 364         d->last_inset_ = 0;
 365         // This is close to a hot-path.
 366         LYXERR(Debug::DEBUG, "BufferView::processUpdateFlags()"
 367                 << "[fitcursor = " << (flags & Update::FitCursor)
 368                 << ", forceupdate = " << (flags & Update::Force)
 369                 << ", singlepar = " << (flags & Update::SinglePar)
 370                 << "]  buffer: " << &buffer_);
 371
 372         buffer_.updateMacros();
 373
 374         // Now do the first drawing step if needed. This consists on updating
 375         // the CoordCache in updateMetrics().
 376         // The second drawing step is done in WorkArea::redraw() if needed.
 377
 378         // Case when no explicit update is requested.
 379         if (!flags) {
 380                 // no need to redraw anything.
 381                 d->update_strategy_ = NoScreenUpdate;
 382                 return;
 383         }
 384
 385         if (flags == Update::Decoration) {
 386                 d->update_strategy_ = DecorationUpdate;
 387                 buffer_.changed();
 388                 return;
 389         }
 390
 391         if (flags == Update::FitCursor
 392                 || flags == (Update::Decoration | Update::FitCursor)) {
 393                 // tell the frontend to update the screen if needed.
 394                 if (fitCursor()) {
 395                         showCursor();
 396                         return;
 397                 }
 398                 if (flags & Update::Decoration) {
 399                         d->update_strategy_ = DecorationUpdate;
 400                         buffer_.changed();
 401                         return;
 402                 }
 403                 // no screen update is needed.
 404                 d->update_strategy_ = NoScreenUpdate;
 405                 return;
 406         }
 407
 408         bool const full_metrics = flags & Update::Force || !singleParUpdate();
 409
 410         if (full_metrics)
 411                 // We have to update the full screen metrics.
 412                 updateMetrics();
 413
 414         if (!(flags & Update::FitCursor)) {
 415                 // Nothing to do anymore. Trigger a redraw and return
 416                 buffer_.changed();
 417                 return;
 418         }
 419
 420         // updateMetrics() does not update paragraph position
 421         // This is done at draw() time. So we need a redraw!
 422         buffer_.changed();
 423
 424         if (fitCursor()) {
 425                 // The cursor is off screen so ensure it is visible.
 426                 // refresh it:
 427                 showCursor();
 428         }
 429 }
 430
 431
 432 void BufferView::updateScrollbar()
 433 {
 434         if (height_ == 0)
 435                 return;
 436
 437         // We prefer fixed size line scrolling.
 438         d->scrollbarParameters_.single_step = defaultRowHeight();
 439         // We prefer full screen page scrolling.
 440         d->scrollbarParameters_.page_step = height_;
 441
 442         Text & t = buffer_.text();
 443         TextMetrics & tm = d->text_metrics_[&t];
 444
 445         LYXERR(Debug::GUI, " Updating scrollbar: height: "
 446                 << t.paragraphs().size()
 447                 << " curr par: " << d->cursor_.bottom().pit()
 448                 << " default height " << defaultRowHeight());
 449
 450         size_t const parsize = t.paragraphs().size();
 451         if (d->par_height_.size() != parsize) {
 452                 d->par_height_.clear();
 453                 // FIXME: We assume a default paragraph height of 2 rows. This
 454                 // should probably be pondered with the screen width.
 455                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
 456         }
 457
 458         // Look at paragraph heights on-screen
 459         pair<pit_type, ParagraphMetrics const *> first = tm.first();
 460         pair<pit_type, ParagraphMetrics const *> last = tm.last();
 461         for (pit_type pit = first.first; pit <= last.first; ++pit) {
 462                 d->par_height_[pit] = tm.parMetrics(pit).height();
 463                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
 464                         << d->par_height_[pit]);
 465         }
 466
 467         int top_pos = first.second->position() - first.second->ascent();
 468         int bottom_pos = last.second->position() + last.second->descent();
 469         bool first_visible = first.first == 0 && top_pos >= 0;
 470         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
 471         if (first_visible && last_visible) {
 472                 d->scrollbarParameters_.min = 0;
 473                 d->scrollbarParameters_.max = 0;
 474                 return;
 475         }
 476
 477         d->scrollbarParameters_.min = top_pos;
 478         for (size_t i = 0; i != size_t(first.first); ++i)
 479                 d->scrollbarParameters_.min -= d->par_height_[i];
 480         d->scrollbarParameters_.max = bottom_pos;
 481         for (size_t i = last.first + 1; i != parsize; ++i)
 482                 d->scrollbarParameters_.max += d->par_height_[i];
 483
 484         d->scrollbarParameters_.position = 0;
 485         // The reference is the top position so we remove one page.
 486         d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 487 }
 488
 489
 490 ScrollbarParameters const & BufferView::scrollbarParameters() const
 491 {
 492         return d->scrollbarParameters_;
 493 }
 494
 495
 496 docstring BufferView::toolTip(int x, int y) const
 497 {
 498         // Get inset under mouse, if there is one.
 499         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 500         if (!covering_inset)
 501                 // No inset, no tooltip...
 502                 return docstring();
 503         return covering_inset->toolTip(*this, x, y);
 504 }
 505
 506
 507 docstring BufferView::contextMenu(int x, int y) const
 508 {
 509         // Get inset under mouse, if there is one.
 510         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 511         if (covering_inset)
 512                 return covering_inset->contextMenu(*this, x, y);
 513
 514         // FIXME: Do something more elaborate here.
 515         return from_ascii("edit");
 516 }
 517
 518
 519 void BufferView::scrollDocView(int value)
 520 {
 521         int const offset = value - d->scrollbarParameters_.position;
 522         // If the offset is less than 2 screen height, prefer to scroll instead.
 523         if (abs(offset) <= 2 * height_) {
 524                 scroll(offset);
 525                 return;
 526         }
 527
 528         // cut off at the top
 529         if (value <= d->scrollbarParameters_.min) {
 530                 DocIterator dit = doc_iterator_begin(buffer_.inset());
 531                 showCursor(dit);
 532                 LYXERR(Debug::SCROLLING, "scroll to top");
 533                 return;
 534         }
 535
 536         // cut off at the bottom
 537         if (value >= d->scrollbarParameters_.max) {
 538                 DocIterator dit = doc_iterator_end(buffer_.inset());
 539                 dit.backwardPos();
 540                 showCursor(dit);
 541                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 542                 return;
 543         }
 544
 545         // find paragraph at target position
 546         int par_pos = d->scrollbarParameters_.min;
 547         pit_type i = 0;
 548         for (; i != int(d->par_height_.size()); ++i) {
 549                 par_pos += d->par_height_[i];
 550                 if (par_pos >= value)
 551                         break;
 552         }
 553
 554         if (par_pos < value) {
 555                 // It seems we didn't find the correct pit so stay on the safe side and
 556                 // scroll to bottom.
 557                 LYXERR0("scrolling position not found!");
 558                 scrollDocView(d->scrollbarParameters_.max);
 559                 return;
 560         }
 561
 562         DocIterator dit = doc_iterator_begin(buffer_.inset());
 563         dit.pit() = i;
 564         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 565         showCursor(dit);
 566 }
 567
 568
 569 // FIXME: this method is not working well.
 570 void BufferView::setCursorFromScrollbar()
 571 {
 572         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 573
 574         int const height = 2 * defaultRowHeight();
 575         int const first = height;
 576         int const last = height_ - height;
 577         Cursor & cur = d->cursor_;
 578
 579         switch (cursorStatus(cur)) {
 580         case CUR_ABOVE:
 581                 // We reset the cursor because cursorStatus() does not
 582                 // work when the cursor is within mathed.
 583                 cur.reset(buffer_.inset());
 584                 tm.setCursorFromCoordinates(cur, 0, first);
 585                 cur.clearSelection();
 586                 break;
 587         case CUR_BELOW:
 588                 // We reset the cursor because cursorStatus() does not
 589                 // work when the cursor is within mathed.
 590                 cur.reset(buffer_.inset());
 591                 tm.setCursorFromCoordinates(cur, 0, last);
 592                 cur.clearSelection();
 593                 break;
 594         case CUR_INSIDE:
 595                 int const y = getPos(cur, cur.boundary()).y_;
 596                 int const newy = min(last, max(y, first));
 597                 if (y != newy) {
 598                         cur.reset(buffer_.inset());
 599                         tm.setCursorFromCoordinates(cur, 0, newy);
 600                 }
 601         }
 602 }
 603
 604
 605 Change const BufferView::getCurrentChange() const
 606 {
 607         if (!d->cursor_.selection())
 608                 return Change(Change::UNCHANGED);
 609
 610         DocIterator dit = d->cursor_.selectionBegin();
 611         return dit.paragraph().lookupChange(dit.pos());
 612 }
 613
 614
 615 // this could be used elsewhere as well?
 616 // FIXME: This does not work within mathed!
 617 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 618 {
 619         Point const p = getPos(dit, dit.boundary());
 620         if (p.y_ < 0)
 621                 return CUR_ABOVE;
 622         if (p.y_ > workHeight())
 623                 return CUR_BELOW;
 624         return CUR_INSIDE;
 625 }
 626
 627
 628 void BufferView::saveBookmark(unsigned int idx)
 629 {
 630         // tenatively save bookmark, id and pos will be used to
 631         // acturately locate a bookmark in a 'live' lyx session.
 632         // pit and pos will be updated with bottom level pit/pos
 633         // when lyx exits.
 634         LyX::ref().session().bookmarks().save(
 635                 buffer_.fileName(),
 636                 d->cursor_.bottom().pit(),
 637                 d->cursor_.bottom().pos(),
 638                 d->cursor_.paragraph().id(),
 639                 d->cursor_.pos(),
 640                 idx
 641         );
 642         if (idx)
 643                 // emit message signal.
 644                 message(_("Save bookmark"));
 645 }
 646
 647
 648 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 649         int top_id, pos_type top_pos)
 650 {
 651         bool success = false;
 652         DocIterator dit;
 653
 654         d->cursor_.clearSelection();
 655
 656         // if a valid par_id is given, try it first
 657         // This is the case for a 'live' bookmark when unique paragraph ID
 658         // is used to track bookmarks.
 659         if (top_id > 0) {
 660                 dit = buffer_.getParFromID(top_id);
 661                 if (!dit.atEnd()) {
 662                         dit.pos() = min(dit.paragraph().size(), top_pos);
 663                         // Some slices of the iterator may not be
 664                         // reachable (e.g. closed collapsable inset)
 665                         // so the dociterator may need to be
 666                         // shortened. Otherwise, setCursor may crash
 667                         // lyx when the cursor can not be set to these
 668                         // insets.
 669                         size_t const n = dit.depth();
 670                         for (size_t i = 0; i < n; ++i)
 671                                 if (dit[i].inset().editable() != Inset::HIGHLY_EDITABLE) {
 672                                         dit.resize(i);
 673                                         break;
 674                                 }
 675                         success = true;
 676                 }
 677         }
 678
 679         // if top_id == 0, or searching through top_id failed
 680         // This is the case for a 'restored' bookmark when only bottom
 681         // (document level) pit was saved. Because of this, bookmark
 682         // restoration is inaccurate. If a bookmark was within an inset,
 683         // it will be restored to the left of the outmost inset that contains
 684         // the bookmark.
 685         if (bottom_pit < int(buffer_.paragraphs().size())) {
 686                 dit = doc_iterator_begin(buffer_.inset());
 687
 688                 dit.pit() = bottom_pit;
 689                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 690                 success = true;
 691         }
 692
 693         if (success) {
 694                 // Note: only bottom (document) level pit is set.
 695                 setCursor(dit);
 696                 // set the current font.
 697                 d->cursor_.setCurrentFont();
 698                 // To center the screen on this new position we need the
 699                 // paragraph position which is computed at draw() time.
 700                 // So we need a redraw!
 701                 buffer_.changed();
 702                 if (fitCursor())
 703                         showCursor();
 704         }
 705
 706         return success;
 707 }
 708
 709
 710 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 711 {
 712         if (lyxrc.rtl_support) {
 713                 if (d->cursor_.real_current_font.isRightToLeft()) {
 714                         if (d->intl_.keymap == Intl::PRIMARY)
 715                                 d->intl_.keyMapSec();
 716                 } else {
 717                         if (d->intl_.keymap == Intl::SECONDARY)
 718                                 d->intl_.keyMapPrim();
 719                 }
 720         }
 721
 722         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 723 }
 724
 725
 726 int BufferView::workWidth() const
 727 {
 728         return width_;
 729 }
 730
 731
 732 void BufferView::showCursor()
 733 {
 734         showCursor(d->cursor_);
 735 }
 736
 737
 738 void BufferView::showCursor(DocIterator const & dit)
 739 {
 740         // We are not properly started yet, delay until resizing is
 741         // done.
 742         if (height_ == 0)
 743                 return;
 744
 745         LYXERR(Debug::SCROLLING, "recentering!");
 746
 747         CursorSlice const & bot = dit.bottom();
 748         TextMetrics & tm = d->text_metrics_[bot.text()];
 749
 750         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 751         int bot_pit = bot.pit();
 752         if (bot_pit > max_pit) {
 753                 // FIXME: Why does this happen?
 754                 LYXERR0("bottom pit is greater that max pit: "
 755                         << bot_pit << " > " << max_pit);
 756                 bot_pit = max_pit;
 757         }
 758
 759         if (bot_pit == tm.first().first - 1)
 760                 tm.newParMetricsUp();
 761         else if (bot_pit == tm.last().first + 1)
 762                 tm.newParMetricsDown();
 763
 764         if (tm.has(bot_pit)) {
 765                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 766                 BOOST_ASSERT(!pm.rows().empty());
 767                 // FIXME: smooth scrolling doesn't work in mathed.
 768                 CursorSlice const & cs = dit.innerTextSlice();
 769                 int offset = coordOffset(dit, dit.boundary()).y_;
 770                 int ypos = pm.position() + offset;
 771                 Dimension const & row_dim =
 772                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 773                 if (ypos - row_dim.ascent() < 0)
 774                         scrollUp(- ypos + row_dim.ascent());
 775                 else if (ypos + row_dim.descent() > height_)
 776                         scrollDown(ypos - height_ + row_dim.descent());
 777                 // else, nothing to do, the cursor is already visible so we just return.
 778                 return;
 779         }
 780
 781         tm.redoParagraph(bot_pit);
 782         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 783         int offset = coordOffset(dit, dit.boundary()).y_;
 784
 785         d->anchor_pit_ = bot_pit;
 786         CursorSlice const & cs = dit.innerTextSlice();
 787         Dimension const & row_dim =
 788                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 789
 790         if (d->anchor_pit_ == 0)
 791                 d->anchor_ypos_ = offset + pm.ascent();
 792         else if (d->anchor_pit_ == max_pit)
 793                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
 794         else
 795                 d->anchor_ypos_ = defaultRowHeight() * 2 - offset - row_dim.descent();
 796
 797         updateMetrics();
 798         buffer_.changed();
 799 }
 800
 801
 802 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 803 {
 804         FuncStatus flag;
 805
 806         Cursor & cur = d->cursor_;
 807
 808         switch (cmd.action) {
 809
 810         case LFUN_UNDO:
 811                 flag.enabled(buffer_.undo().hasUndoStack());
 812                 break;
 813         case LFUN_REDO:
 814                 flag.enabled(buffer_.undo().hasRedoStack());
 815                 break;
 816         case LFUN_FILE_INSERT:
 817         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 818         case LFUN_FILE_INSERT_PLAINTEXT:
 819         case LFUN_BOOKMARK_SAVE:
 820                 // FIXME: Actually, these LFUNS should be moved to Text
 821                 flag.enabled(cur.inTexted());
 822                 break;
 823         case LFUN_FONT_STATE:
 824         case LFUN_LABEL_INSERT:
 825         case LFUN_INFO_INSERT:
 826         case LFUN_PARAGRAPH_GOTO:
 827         case LFUN_NOTE_NEXT:
 828         case LFUN_REFERENCE_NEXT:
 829         case LFUN_WORD_FIND:
 830         case LFUN_WORD_REPLACE:
 831         case LFUN_MARK_OFF:
 832         case LFUN_MARK_ON:
 833         case LFUN_MARK_TOGGLE:
 834         case LFUN_SCREEN_RECENTER:
 835         case LFUN_BIBTEX_DATABASE_ADD:
 836         case LFUN_BIBTEX_DATABASE_DEL:
 837         case LFUN_STATISTICS:
 838         case LFUN_NEXT_INSET_TOGGLE:
 839                 flag.enabled(true);
 840                 break;
 841
 842         case LFUN_LABEL_GOTO: {
 843                 flag.enabled(!cmd.argument().empty()
 844                     || getInsetByCode<InsetRef>(cur, REF_CODE));
 845                 break;
 846         }
 847
 848         case LFUN_CHANGES_TRACK:
 849                 flag.enabled(true);
 850                 flag.setOnOff(buffer_.params().trackChanges);
 851                 break;
 852
 853         case LFUN_CHANGES_OUTPUT:
 854                 flag.enabled(true);
 855                 flag.setOnOff(buffer_.params().outputChanges);
 856                 break;
 857
 858         case LFUN_CHANGES_MERGE:
 859         case LFUN_CHANGE_NEXT:
 860         case LFUN_ALL_CHANGES_ACCEPT:
 861         case LFUN_ALL_CHANGES_REJECT:
 862                 // TODO: context-sensitive enabling of LFUNs
 863                 // In principle, these command should only be enabled if there
 864                 // is a change in the document. However, without proper
 865                 // optimizations, this will inevitably result in poor performance.
 866                 flag.enabled(true);
 867                 break;
 868
 869         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 870                 flag.setOnOff(buffer_.params().compressed);
 871                 break;
 872         }
 873
 874         case LFUN_BUFFER_TOGGLE_EMBEDDING: {
 875                 flag.setOnOff(buffer_.params().embedded);
 876                 break;
 877         }
 878
 879         case LFUN_SCREEN_UP:
 880         case LFUN_SCREEN_DOWN:
 881         case LFUN_SCROLL:
 882                 flag.enabled(true);
 883                 break;
 884
 885         // FIXME: LFUN_SCREEN_DOWN_SELECT should be removed from
 886         // everywhere else before this can enabled:
 887         case LFUN_SCREEN_UP_SELECT:
 888         case LFUN_SCREEN_DOWN_SELECT:
 889                 flag.enabled(false);
 890                 break;
 891
 892         case LFUN_LAYOUT_TABULAR:
 893                 flag.enabled(cur.innerInsetOfType(TABULAR_CODE));
 894                 break;
 895
 896         case LFUN_LAYOUT:
 897         case LFUN_LAYOUT_PARAGRAPH:
 898                 flag.enabled(cur.inset().allowParagraphCustomization(cur.idx()));
 899                 break;
 900
 901         case LFUN_INSET_SETTINGS: {
 902                 InsetCode code = cur.inset().lyxCode();
 903                 bool enable = false;
 904                 switch (code) {
 905                         case TABULAR_CODE:
 906                                 enable = cmd.argument() == "tabular";
 907                                 break;
 908                         case ERT_CODE:
 909                                 enable = cmd.argument() == "ert";
 910                                 break;
 911                         case FLOAT_CODE:
 912                                 enable = cmd.argument() == "float";
 913                                 break;
 914                         case WRAP_CODE:
 915                                 enable = cmd.argument() == "wrap";
 916                                 break;
 917                         case NOTE_CODE:
 918                                 enable = cmd.argument() == "note";
 919                                 break;
 920                         case BRANCH_CODE:
 921                                 enable = cmd.argument() == "branch";
 922                                 break;
 923                         case BOX_CODE:
 924                                 enable = cmd.argument() == "box";
 925                                 break;
 926                         case LISTINGS_CODE:
 927                                 enable = cmd.argument() == "listings";
 928                                 break;
 929                         default:
 930                                 break;
 931                 }
 932                 flag.enabled(enable);
 933                 break;
 934         }
 935
 936         case LFUN_DIALOG_SHOW_NEW_INSET:
 937                 flag.enabled(cur.inset().lyxCode() != ERT_CODE &&
 938                         cur.inset().lyxCode() != LISTINGS_CODE);
 939                 if (cur.inset().lyxCode() == CAPTION_CODE) {
 940                         FuncStatus flag;
 941                         if (cur.inset().getStatus(cur, cmd, flag))
 942                                 return flag;
 943                 }
 944                 break;
 945
 946         default:
 947                 flag.enabled(false);
 948         }
 949
 950         return flag;
 951 }
 952
 953
 954 bool BufferView::dispatch(FuncRequest const & cmd)
 955 {
 956         //lyxerr << [ cmd = " << cmd << "]" << endl;
 957
 958         // Make sure that the cached BufferView is correct.
 959         LYXERR(Debug::ACTION, " action[" << cmd.action << ']'
 960                 << " arg[" << to_utf8(cmd.argument()) << ']'
 961                 << " x[" << cmd.x << ']'
 962                 << " y[" << cmd.y << ']'
 963                 << " button[" << cmd.button() << ']');
 964
 965         Cursor & cur = d->cursor_;
 966
 967         switch (cmd.action) {
 968
 969         case LFUN_UNDO:
 970                 cur.message(_("Undo"));
 971                 cur.clearSelection();
 972                 if (!cur.textUndo())
 973                         cur.message(_("No further undo information"));
 974                 else
 975                         processUpdateFlags(Update::Force | Update::FitCursor);
 976                 break;
 977
 978         case LFUN_REDO:
 979                 cur.message(_("Redo"));
 980                 cur.clearSelection();
 981                 if (!cur.textRedo())
 982                         cur.message(_("No further redo information"));
 983                 else
 984                         processUpdateFlags(Update::Force | Update::FitCursor);
 985                 break;
 986
 987         case LFUN_FONT_STATE:
 988                 cur.message(cur.currentState());
 989                 break;
 990
 991         case LFUN_BOOKMARK_SAVE:
 992                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 993                 break;
 994
 995         case LFUN_LABEL_GOTO: {
 996                 docstring label = cmd.argument();
 997                 if (label.empty()) {
 998                         InsetRef * inset =
 999                                 getInsetByCode<InsetRef>(d->cursor_,
1000                                                          REF_CODE);
1001                         if (inset) {
1002                                 label = inset->getParam("reference");
1003                                 // persistent=false: use temp_bookmark
1004                                 saveBookmark(0);
1005                         }
1006                 }
1007
1008                 if (!label.empty())
1009                         gotoLabel(label);
1010                 break;
1011         }
1012
1013         case LFUN_PARAGRAPH_GOTO: {
1014                 int const id = convert<int>(to_utf8(cmd.argument()));
1015                 int i = 0;
1016                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1017                         b = theBufferList().next(b)) {
1018
1019                         DocIterator dit = b->getParFromID(id);
1020                         if (dit.atEnd()) {
1021                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1022                                 ++i;
1023                                 continue;
1024                         }
1025                         LYXERR(Debug::INFO, "Paragraph " << dit.paragraph().id()
1026                                 << " found in buffer `"
1027                                 << b->absFileName() << "'.");
1028
1029                         if (b == &buffer_) {
1030                                 // Set the cursor
1031                                 setCursor(dit);
1032                                 processUpdateFlags(Update::Force | Update::FitCursor);
1033                         } else {
1034                                 // Switch to other buffer view and resend cmd
1035                                 theLyXFunc().dispatch(FuncRequest(
1036                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1037                                 theLyXFunc().dispatch(cmd);
1038                         }
1039                         break;
1040                 }
1041                 break;
1042         }
1043
1044         case LFUN_NOTE_NEXT:
1045                 gotoInset(this, NOTE_CODE, false);
1046                 break;
1047
1048         case LFUN_REFERENCE_NEXT: {
1049                 vector<InsetCode> tmp;
1050                 tmp.push_back(LABEL_CODE);
1051                 tmp.push_back(REF_CODE);
1052                 gotoInset(this, tmp, true);
1053                 break;
1054         }
1055
1056         case LFUN_CHANGES_TRACK:
1057                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
1058                 break;
1059
1060         case LFUN_CHANGES_OUTPUT:
1061                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
1062                 if (buffer_.params().outputChanges) {
1063                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
1064                         bool xcolorsoul = LaTeXFeatures::isAvailable("soul") &&
1065                                           LaTeXFeatures::isAvailable("xcolor");
1066
1067                         if (!dvipost && !xcolorsoul) {
1068                                 Alert::warning(_("Changes not shown in LaTeX output"),
1069                                                _("Changes will not be highlighted in LaTeX output, "
1070                                                  "because neither dvipost nor xcolor/soul are installed.\n"
1071                                                  "Please install these packages or redefine "
1072                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1073                         } else if (!xcolorsoul) {
1074                                 Alert::warning(_("Changes not shown in LaTeX output"),
1075                                                _("Changes will not be highlighted in LaTeX output "
1076                                                  "when using pdflatex, because xcolor and soul are not installed.\n"
1077                                                  "Please install both packages or redefine "
1078                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1079                         }
1080                 }
1081                 break;
1082
1083         case LFUN_CHANGE_NEXT:
1084                 findNextChange(this);
1085                 break;
1086
1087         case LFUN_CHANGES_MERGE:
1088                 if (findNextChange(this))
1089                         showDialog("changes");
1090                 break;
1091
1092         case LFUN_ALL_CHANGES_ACCEPT:
1093                 // select complete document
1094                 d->cursor_.reset(buffer_.inset());
1095                 d->cursor_.selHandle(true);
1096                 buffer_.text().cursorBottom(d->cursor_);
1097                 // accept everything in a single step to support atomic undo
1098                 buffer_.text().acceptOrRejectChanges(d->cursor_, Text::ACCEPT);
1099                 break;
1100
1101         case LFUN_ALL_CHANGES_REJECT:
1102                 // select complete document
1103                 d->cursor_.reset(buffer_.inset());
1104                 d->cursor_.selHandle(true);
1105                 buffer_.text().cursorBottom(d->cursor_);
1106                 // reject everything in a single step to support atomic undo
1107                 // Note: reject does not work recursively; the user may have to repeat the operation
1108                 buffer_.text().acceptOrRejectChanges(d->cursor_, Text::REJECT);
1109                 break;
1110
1111         case LFUN_WORD_FIND:
1112                 if (find(this, cmd))
1113                         showCursor();
1114                 else
1115                         message(_("String not found!"));
1116                 break;
1117
1118         case LFUN_WORD_REPLACE: {
1119                 bool has_deleted = false;
1120                 if (cur.selection()) {
1121                         DocIterator beg = cur.selectionBegin();
1122                         DocIterator end = cur.selectionEnd();
1123                         if (beg.pit() == end.pit()) {
1124                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1125                                         if (cur.paragraph().isDeleted(p))
1126                                                 has_deleted = true;
1127                                 }
1128                         }
1129                 }
1130                 replace(this, cmd, has_deleted);
1131                 break;
1132         }
1133
1134         case LFUN_MARK_OFF:
1135                 cur.clearSelection();
1136                 cur.resetAnchor();
1137                 cur.message(from_utf8(N_("Mark off")));
1138                 break;
1139
1140         case LFUN_MARK_ON:
1141                 cur.clearSelection();
1142                 cur.mark() = true;
1143                 cur.resetAnchor();
1144                 cur.message(from_utf8(N_("Mark on")));
1145                 break;
1146
1147         case LFUN_MARK_TOGGLE:
1148                 cur.clearSelection();
1149                 if (cur.mark()) {
1150                         cur.mark() = false;
1151                         cur.message(from_utf8(N_("Mark removed")));
1152                 } else {
1153                         cur.mark() = true;
1154                         cur.message(from_utf8(N_("Mark set")));
1155                 }
1156                 cur.resetAnchor();
1157                 break;
1158
1159         case LFUN_SCREEN_RECENTER:
1160                 showCursor();
1161                 break;
1162
1163         case LFUN_BIBTEX_DATABASE_ADD: {
1164                 Cursor tmpcur = d->cursor_;
1165                 findInset(tmpcur, BIBTEX_CODE, false);
1166                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1167                                                 BIBTEX_CODE);
1168                 if (inset) {
1169                         if (inset->addDatabase(to_utf8(cmd.argument())))
1170                                 buffer_.updateBibfilesCache();
1171                 }
1172                 break;
1173         }
1174
1175         case LFUN_BIBTEX_DATABASE_DEL: {
1176                 Cursor tmpcur = d->cursor_;
1177                 findInset(tmpcur, BIBTEX_CODE, false);
1178                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1179                                                 BIBTEX_CODE);
1180                 if (inset) {
1181                         if (inset->delDatabase(to_utf8(cmd.argument())))
1182                                 buffer_.updateBibfilesCache();
1183                 }
1184                 break;
1185         }
1186
1187         case LFUN_STATISTICS: {
1188                 DocIterator from, to;
1189                 if (cur.selection()) {
1190                         from = cur.selectionBegin();
1191                         to = cur.selectionEnd();
1192                 } else {
1193                         from = doc_iterator_begin(buffer_.inset());
1194                         to = doc_iterator_end(buffer_.inset());
1195                 }
1196                 int const words = countWords(from, to);
1197                 int const chars = countChars(from, to, false);
1198                 int const chars_blanks = countChars(from, to, true);
1199                 docstring message;
1200                 if (cur.selection())
1201                         message = _("Statistics for the selection:");
1202                 else
1203                         message = _("Statistics for the document:");
1204                 message += "\n\n";
1205                 if (words != 1)
1206                         message += bformat(_("%1$d words"), words);
1207                 else
1208                         message += _("One word");
1209                 message += "\n";
1210                 if (chars_blanks != 1)
1211                         message += bformat(_("%1$d characters (including blanks)"),
1212                                           chars_blanks);
1213                 else
1214                         message += _("One character (including blanks)");
1215                 message += "\n";
1216                 if (chars != 1)
1217                         message += bformat(_("%1$d characters (excluding blanks)"),
1218                                           chars);
1219                 else
1220                         message += _("One character (excluding blanks)");
1221
1222                 Alert::information(_("Statistics"), message);
1223         }
1224                 break;
1225
1226         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1227                 // turn compression on/off
1228                 buffer_.params().compressed = !buffer_.params().compressed;
1229                 break;
1230
1231         case LFUN_BUFFER_TOGGLE_EMBEDDING: {
1232                 // turn embedding on/off
1233                 try {
1234                         buffer_.embeddedFiles().enable(!buffer_.params().embedded, buffer_);
1235                 } catch (ExceptionMessage const & message) {
1236                         Alert::error(message.title_, message.details_);
1237                 }
1238                 break;
1239         }
1240
1241         case LFUN_NEXT_INSET_TOGGLE: {
1242                 // this is the real function we want to invoke
1243                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
1244                 // if there is an inset at cursor, see whether it
1245                 // wants to toggle.
1246                 Inset * inset = cur.nextInset();
1247                 if (inset) {
1248                         if (inset->isActive()) {
1249                                 Cursor tmpcur = cur;
1250                                 tmpcur.pushBackward(*inset);
1251                                 inset->dispatch(tmpcur, tmpcmd);
1252                                 if (tmpcur.result().dispatched()) {
1253                                         cur.dispatched();
1254                                 }
1255                         } else if (inset->editable() == Inset::IS_EDITABLE) {
1256                                 inset->edit(cur, true);
1257                         }
1258                 }
1259                 // if it did not work, try the underlying inset.
1260                 if (!cur.result().dispatched())
1261                         cur.dispatch(tmpcmd);
1262
1263                 if (!cur.result().dispatched())
1264                         // It did not work too; no action needed.
1265                         break;
1266                 cur.clearSelection();
1267                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1268                 break;
1269         }
1270
1271         case LFUN_SCREEN_UP:
1272         case LFUN_SCREEN_DOWN: {
1273                 Point p = getPos(cur, cur.boundary());
1274                 if (p.y_ < 0 || p.y_ > height_) {
1275                         // The cursor is off-screen so recenter before proceeding.
1276                         showCursor();
1277                         p = getPos(cur, cur.boundary());
1278                 }
1279                 scroll(cmd.action == LFUN_SCREEN_UP? - height_ : height_);
1280                 cur.reset(buffer_.inset());
1281                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_);
1282                 //FIXME: what to do with cur.x_target()?
1283                 cur.finishUndo();
1284                 break;
1285         }
1286
1287         case LFUN_SCROLL:
1288                 lfunScroll(cmd);
1289                 break;
1290
1291         case LFUN_SCREEN_UP_SELECT:
1292         case LFUN_SCREEN_DOWN_SELECT: {
1293                 // Those two are not ready yet for consumption.
1294                 return false;
1295
1296                 cur.selHandle(true);
1297                 size_t initial_depth = cur.depth();
1298                 Point const p = getPos(cur, cur.boundary());
1299                 scroll(cmd.action == LFUN_SCREEN_UP_SELECT? - height_ : height_);
1300                 // FIXME: We need to verify if the cursor stayed within an inset...
1301                 //cur.reset(buffer_.inset());
1302                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_);
1303                 cur.finishUndo();
1304                 while (cur.depth() > initial_depth) {
1305                         cur.forwardInset();
1306                 }
1307                 // FIXME: we need to do a redraw again because of the selection
1308                 // But no screen update is needed.
1309                 d->update_strategy_ = NoScreenUpdate;
1310                 buffer_.changed();
1311                 break;
1312         }
1313
1314         default:
1315                 return false;
1316         }
1317
1318         return true;
1319 }
1320
1321
1322 docstring const BufferView::requestSelection()
1323 {
1324         Cursor & cur = d->cursor_;
1325
1326         if (!cur.selection()) {
1327                 d->xsel_cache_.set = false;
1328                 return docstring();
1329         }
1330
1331         if (!d->xsel_cache_.set ||
1332             cur.top() != d->xsel_cache_.cursor ||
1333             cur.anchor_.top() != d->xsel_cache_.anchor)
1334         {
1335                 d->xsel_cache_.cursor = cur.top();
1336                 d->xsel_cache_.anchor = cur.anchor_.top();
1337                 d->xsel_cache_.set = cur.selection();
1338                 return cur.selectionAsString(false);
1339         }
1340         return docstring();
1341 }
1342
1343
1344 void BufferView::clearSelection()
1345 {
1346         d->cursor_.clearSelection();
1347         // Clear the selection buffer. Otherwise a subsequent
1348         // middle-mouse-button paste would use the selection buffer,
1349         // not the more current external selection.
1350         cap::clearSelection();
1351         d->xsel_cache_.set = false;
1352         // The buffer did not really change, but this causes the
1353         // redraw we need because we cleared the selection above.
1354         buffer_.changed();
1355 }
1356
1357
1358 void BufferView::resize(int width, int height)
1359 {
1360         // Update from work area
1361         width_ = width;
1362         height_ = height;
1363
1364         // Clear the paragraph height cache.
1365         d->par_height_.clear();
1366         // Redo the metrics.
1367         updateMetrics();
1368 }
1369
1370
1371 Inset const * BufferView::getCoveringInset(Text const & text,
1372                 int x, int y) const
1373 {
1374         TextMetrics & tm = d->text_metrics_[&text];
1375         Inset * inset = tm.checkInsetHit(x, y);
1376         if (!inset)
1377                 return 0;
1378
1379         if (!inset->descendable())
1380                 // No need to go further down if the inset is not
1381                 // descendable.
1382                 return inset;
1383
1384         size_t cell_number = inset->nargs();
1385         // Check all the inner cell.
1386         for (size_t i = 0; i != cell_number; ++i) {
1387                 Text const * inner_text = inset->getText(i);
1388                 if (inner_text) {
1389                         // Try deeper.
1390                         Inset const * inset_deeper =
1391                                 getCoveringInset(*inner_text, x, y);
1392                         if (inset_deeper)
1393                                 return inset_deeper;
1394                 }
1395         }
1396
1397         return inset;
1398 }
1399
1400
1401 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
1402 {
1403         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
1404
1405         // This is only called for mouse related events including
1406         // LFUN_FILE_OPEN generated by drag-and-drop.
1407         FuncRequest cmd = cmd0;
1408
1409         Cursor cur(*this);
1410         cur.push(buffer_.inset());
1411         cur.selection() = d->cursor_.selection();
1412
1413         // Either the inset under the cursor or the
1414         // surrounding Text will handle this event.
1415
1416         // make sure we stay within the screen...
1417         cmd.y = min(max(cmd.y, -1), height_);
1418
1419         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1420
1421                 // Get inset under mouse, if there is one.
1422                 Inset const * covering_inset =
1423                         getCoveringInset(buffer_.text(), cmd.x, cmd.y);
1424                 if (covering_inset == d->last_inset_)
1425                         // Same inset, no need to do anything...
1426                         return;
1427
1428                 bool need_redraw = false;
1429                 // const_cast because of setMouseHover().
1430                 Inset * inset = const_cast<Inset *>(covering_inset);
1431                 if (d->last_inset_)
1432                         // Remove the hint on the last hovered inset (if any).
1433                         need_redraw |= d->last_inset_->setMouseHover(false);
1434                 if (inset)
1435                         // Highlighted the newly hovered inset (if any).
1436                         need_redraw |= inset->setMouseHover(true);
1437                 d->last_inset_ = inset;
1438                 if (!need_redraw)
1439                         return;
1440
1441                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
1442                         << cmd.x << ", " << cmd.y << ")");
1443
1444                 d->update_strategy_ = DecorationUpdate;
1445
1446                 // This event (moving without mouse click) is not passed further.
1447                 // This should be changed if it is further utilized.
1448                 buffer_.changed();
1449                 return;
1450         }
1451
1452         // Build temporary cursor.
1453         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x, cmd.y);
1454
1455         // Put anchor at the same position.
1456         cur.resetAnchor();
1457
1458         // Try to dispatch to an non-editable inset near this position
1459         // via the temp cursor. If the inset wishes to change the real
1460         // cursor it has to do so explicitly by using
1461         //  cur.bv().cursor() = cur;  (or similar)
1462         if (inset)
1463                 inset->dispatch(cur, cmd);
1464
1465         // Now dispatch to the temporary cursor. If the real cursor should
1466         // be modified, the inset's dispatch has to do so explicitly.
1467         if (!cur.result().dispatched())
1468                 cur.dispatch(cmd);
1469
1470         //Do we have a selection?
1471         theSelection().haveSelection(cursor().selection());
1472
1473         // If the command has been dispatched,
1474         if (cur.result().dispatched()
1475                 // an update is asked,
1476                 && cur.result().update())
1477                 processUpdateFlags(cur.result().update());
1478 }
1479
1480
1481 void BufferView::lfunScroll(FuncRequest const & cmd)
1482 {
1483         string const scroll_type = cmd.getArg(0);
1484         int const scroll_step =
1485                 (scroll_type == "line")? d->scrollbarParameters_.single_step
1486                 : (scroll_type == "page")? d->scrollbarParameters_.page_step : 0;
1487         if (scroll_step == 0)
1488                 return;
1489         string const scroll_quantity = cmd.getArg(1);
1490         if (scroll_quantity == "up")
1491                 scrollUp(scroll_step);
1492         else if (scroll_quantity == "down")
1493                 scrollDown(scroll_step);
1494         else {
1495                 int const scroll_value = convert<int>(scroll_quantity);
1496                 if (scroll_value)
1497                         scroll(scroll_step * scroll_value);
1498         }
1499 }
1500
1501
1502 void BufferView::scroll(int y)
1503 {
1504         if (y > 0)
1505                 scrollDown(y);
1506         else if (y < 0)
1507                 scrollUp(-y);
1508 }
1509
1510
1511 void BufferView::scrollDown(int offset)
1512 {
1513         Text * text = &buffer_.text();
1514         TextMetrics & tm = d->text_metrics_[text];
1515         int ymax = height_ + offset;
1516         while (true) {
1517                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
1518                 int bottom_pos = last.second->position() + last.second->descent();
1519                 if (last.first + 1 == int(text->paragraphs().size())) {
1520                         if (bottom_pos <= height_)
1521                                 return;
1522                         offset = min(offset, bottom_pos - height_);
1523                         break;
1524                 }
1525                 if (bottom_pos > ymax)
1526                         break;
1527                 tm.newParMetricsDown();
1528         }
1529         d->anchor_ypos_ -= offset;
1530         updateMetrics();
1531         buffer_.changed();
1532 }
1533
1534
1535 void BufferView::scrollUp(int offset)
1536 {
1537         Text * text = &buffer_.text();
1538         TextMetrics & tm = d->text_metrics_[text];
1539         int ymin = - offset;
1540         while (true) {
1541                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
1542                 int top_pos = first.second->position() - first.second->ascent();
1543                 if (first.first == 0) {
1544                         if (top_pos >= 0)
1545                                 return;
1546                         offset = min(offset, - top_pos);
1547                         break;
1548                 }
1549                 if (top_pos < ymin)
1550                         break;
1551                 tm.newParMetricsUp();
1552         }
1553         d->anchor_ypos_ += offset;
1554         updateMetrics();
1555         buffer_.changed();
1556 }
1557
1558
1559 void BufferView::setCursorFromRow(int row)
1560 {
1561         int tmpid = -1;
1562         int tmppos = -1;
1563
1564         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
1565
1566         d->cursor_.reset(buffer_.inset());
1567         if (tmpid == -1)
1568                 buffer_.text().setCursor(d->cursor_, 0, 0);
1569         else
1570                 buffer_.text().setCursor(d->cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
1571 }
1572
1573
1574 void BufferView::gotoLabel(docstring const & label)
1575 {
1576         for (InsetIterator it = inset_iterator_begin(buffer_.inset()); it; ++it) {
1577                 vector<docstring> labels;
1578                 it->getLabelList(buffer_, labels);
1579                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1580                         setCursor(it);
1581                         showCursor();
1582                         return;
1583                 }
1584         }
1585 }
1586
1587
1588 TextMetrics const & BufferView::textMetrics(Text const * t) const
1589 {
1590         return const_cast<BufferView *>(this)->textMetrics(t);
1591 }
1592
1593
1594 TextMetrics & BufferView::textMetrics(Text const * t)
1595 {
1596         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
1597         if (tmc_it == d->text_metrics_.end()) {
1598                 tmc_it = d->text_metrics_.insert(
1599                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
1600         }
1601         return tmc_it->second;
1602 }
1603
1604
1605 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
1606                 pit_type pit) const
1607 {
1608         return textMetrics(t).parMetrics(pit);
1609 }
1610
1611
1612 int BufferView::workHeight() const
1613 {
1614         return height_;
1615 }
1616
1617
1618 void BufferView::setCursor(DocIterator const & dit)
1619 {
1620         size_t const n = dit.depth();
1621         for (size_t i = 0; i < n; ++i)
1622                 dit[i].inset().edit(d->cursor_, true);
1623
1624         d->cursor_.setCursor(dit);
1625         d->cursor_.selection() = false;
1626 }
1627
1628
1629 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
1630 {
1631         // Would be wrong to delete anything if we have a selection.
1632         if (cur.selection())
1633                 return false;
1634
1635         bool need_anchor_change = false;
1636         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1637                 need_anchor_change);
1638
1639         if (need_anchor_change)
1640                 cur.resetAnchor();
1641
1642         if (!changed)
1643                 return false;
1644
1645         d->cursor_ = cur;
1646
1647         updateLabels(buffer_);
1648
1649         updateMetrics();
1650         buffer_.changed();
1651         return true;
1652 }
1653
1654
1655 bool BufferView::mouseSetCursor(Cursor & cur, bool select)
1656 {
1657         BOOST_ASSERT(&cur.bv() == this);
1658
1659         if (!select)
1660                 // this event will clear selection so we save selection for
1661                 // persistent selection
1662                 cap::saveSelection(cursor());
1663
1664         // Has the cursor just left the inset?
1665         bool badcursor = false;
1666         bool leftinset = (&d->cursor_.inset() != &cur.inset());
1667         if (leftinset)
1668                 badcursor = notifyCursorLeaves(d->cursor_, cur);
1669
1670         // FIXME: shift-mouse selection doesn't work well across insets.
1671         bool do_selection = select && &d->cursor_.anchor().inset() == &cur.inset();
1672
1673         // do the dEPM magic if needed
1674         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
1675         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
1676         // the leftinset bool would not be necessary (badcursor instead).
1677         bool update = leftinset;
1678         if (!do_selection && !badcursor && d->cursor_.inTexted())
1679                 update |= checkDepm(cur, d->cursor_);
1680
1681         // if the cursor was in an empty script inset and the new
1682         // position is in the nucleus of the inset, notifyCursorLeaves
1683         // will kill the script inset itself. So we check all the
1684         // elements of the cursor to make sure that they are correct.
1685         // For an example, see bug 2933:
1686         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1687         // The code below could maybe be moved to a DocIterator method.
1688         //lyxerr << "cur before " << cur << endl;
1689         DocIterator dit = doc_iterator_begin(cur.inset());
1690         dit.bottom() = cur.bottom();
1691         size_t i = 1;
1692         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1693                 dit.push_back(cur[i]);
1694                 ++i;
1695         }
1696         //lyxerr << "5 cur after" << dit <<endl;
1697
1698         d->cursor_.setCursor(dit);
1699         d->cursor_.boundary(cur.boundary());
1700         if (do_selection)
1701                 d->cursor_.setSelection();
1702         else
1703                 d->cursor_.clearSelection();
1704
1705         d->cursor_.finishUndo();
1706         d->cursor_.setCurrentFont();
1707         return update;
1708 }
1709
1710
1711 void BufferView::putSelectionAt(DocIterator const & cur,
1712                                 int length, bool backwards)
1713 {
1714         d->cursor_.clearSelection();
1715
1716         setCursor(cur);
1717
1718         if (length) {
1719                 if (backwards) {
1720                         d->cursor_.pos() += length;
1721                         d->cursor_.setSelection(d->cursor_, -length);
1722                 } else
1723                         d->cursor_.setSelection(d->cursor_, length);
1724         }
1725         // Ensure a redraw happens in any case because the new selection could
1726         // possibly be on the same screen as the previous selection.
1727         processUpdateFlags(Update::Force | Update::FitCursor);
1728 }
1729
1730
1731 Cursor & BufferView::cursor()
1732 {
1733         return d->cursor_;
1734 }
1735
1736
1737 Cursor const & BufferView::cursor() const
1738 {
1739         return d->cursor_;
1740 }
1741
1742
1743 pit_type BufferView::anchor_ref() const
1744 {
1745         return d->anchor_pit_;
1746 }
1747
1748
1749 bool BufferView::singleParUpdate()
1750 {
1751         Text & buftext = buffer_.text();
1752         pit_type const bottom_pit = d->cursor_.bottom().pit();
1753         TextMetrics & tm = textMetrics(&buftext);
1754         int old_height = tm.parMetrics(bottom_pit).height();
1755
1756         // In Single Paragraph mode, rebreak only
1757         // the (main text, not inset!) paragraph containing the cursor.
1758         // (if this paragraph contains insets etc., rebreaking will
1759         // recursively descend)
1760         tm.redoParagraph(bottom_pit);
1761         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
1762         if (pm.height() != old_height)
1763                 // Paragraph height has changed so we cannot proceed to
1764                 // the singlePar optimisation.
1765                 return false;
1766
1767         d->update_strategy_ = SingleParUpdate;
1768
1769         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
1770                 << " y2: " << pm.position() + pm.descent()
1771                 << " pit: " << bottom_pit
1772                 << " singlepar: 1");
1773         return true;
1774 }
1775
1776
1777 void BufferView::updateMetrics()
1778 {
1779         Text & buftext = buffer_.text();
1780         pit_type const npit = int(buftext.paragraphs().size());
1781
1782         // Clear out the position cache in case of full screen redraw,
1783         d->coord_cache_.clear();
1784
1785         // Clear out paragraph metrics to avoid having invalid metrics
1786         // in the cache from paragraphs not relayouted below
1787         // The complete text metrics will be redone.
1788         d->text_metrics_.clear();
1789
1790         TextMetrics & tm = textMetrics(&buftext);
1791
1792         // Rebreak anchor paragraph.
1793         tm.redoParagraph(d->anchor_pit_);
1794         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
1795
1796         // position anchor
1797         if (d->anchor_pit_ == 0) {
1798                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
1799
1800                 // Complete buffer visible? Then it's easy.
1801                 if (scrollRange == 0)
1802                         d->anchor_ypos_ = anchor_pm.ascent();
1803
1804                 // FIXME: Some clever handling needed to show
1805                 // the _first_ paragraph up to the top if the cursor is
1806                 // in the first line.
1807         }
1808         anchor_pm.setPosition(d->anchor_ypos_);
1809
1810         LYXERR(Debug::PAINTING, "metrics: "
1811                 << " anchor pit = " << d->anchor_pit_
1812                 << " anchor ypos = " << d->anchor_ypos_);
1813
1814         // Redo paragraphs above anchor if necessary.
1815         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
1816         // We are now just above the anchor paragraph.
1817         pit_type pit1 = d->anchor_pit_ - 1;
1818         for (; pit1 >= 0 && y1 >= 0; --pit1) {
1819                 tm.redoParagraph(pit1);
1820                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
1821                 y1 -= pm.descent();
1822                 // Save the paragraph position in the cache.
1823                 pm.setPosition(y1);
1824                 y1 -= pm.ascent();
1825         }
1826
1827         // Redo paragraphs below the anchor if necessary.
1828         int y2 = d->anchor_ypos_ + anchor_pm.descent();
1829         // We are now just below the anchor paragraph.
1830         pit_type pit2 = d->anchor_pit_ + 1;
1831         for (; pit2 < npit && y2 <= height_; ++pit2) {
1832                 tm.redoParagraph(pit2);
1833                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
1834                 y2 += pm.ascent();
1835                 // Save the paragraph position in the cache.
1836                 pm.setPosition(y2);
1837                 y2 += pm.descent();
1838         }
1839
1840         LYXERR(Debug::PAINTING, "Metrics: "
1841                 << " anchor pit = " << d->anchor_pit_
1842                 << " anchor ypos = " << d->anchor_ypos_
1843                 << " y1 = " << y1
1844                 << " y2 = " << y2
1845                 << " pit1 = " << pit1
1846                 << " pit2 = " << pit2);
1847
1848         d->update_strategy_ = FullScreenUpdate;
1849
1850         if (lyxerr.debugging(Debug::WORKAREA)) {
1851                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
1852                 d->coord_cache_.dump();
1853         }
1854 }
1855
1856
1857 void BufferView::insertLyXFile(FileName const & fname)
1858 {
1859         BOOST_ASSERT(d->cursor_.inTexted());
1860
1861         // Get absolute path of file and add ".lyx"
1862         // to the filename if necessary
1863         FileName filename = fileSearch(string(), fname.absFilename(), "lyx");
1864
1865         docstring const disp_fn = makeDisplayPath(filename.absFilename());
1866         // emit message signal.
1867         message(bformat(_("Inserting document %1$s..."), disp_fn));
1868
1869         docstring res;
1870         Buffer buf("", false);
1871         if (buf.loadLyXFile(filename)) {
1872                 ErrorList & el = buffer_.errorList("Parse");
1873                 // Copy the inserted document error list into the current buffer one.
1874                 el = buf.errorList("Parse");
1875                 buffer_.undo().recordUndo(d->cursor_);
1876                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
1877                                              buf.params().getTextClassPtr(), el);
1878                 res = _("Document %1$s inserted.");
1879         } else {
1880                 res = _("Could not insert document %1$s");
1881         }
1882
1883         updateMetrics();
1884         buffer_.changed();
1885         // emit message signal.
1886         message(bformat(res, disp_fn));
1887         buffer_.errors("Parse");
1888 }
1889
1890
1891 Point BufferView::coordOffset(DocIterator const & dit, bool boundary) const
1892 {
1893         int x = 0;
1894         int y = 0;
1895         int lastw = 0;
1896
1897         // Addup contribution of nested insets, from inside to outside,
1898         // keeping the outer paragraph for a special handling below
1899         for (size_t i = dit.depth() - 1; i >= 1; --i) {
1900                 CursorSlice const & sl = dit[i];
1901                 int xx = 0;
1902                 int yy = 0;
1903
1904                 // get relative position inside sl.inset()
1905                 sl.inset().cursorPos(*this, sl, boundary && (i + 1 == dit.depth()), xx, yy);
1906
1907                 // Make relative position inside of the edited inset relative to sl.inset()
1908                 x += xx;
1909                 y += yy;
1910
1911                 // In case of an RTL inset, the edited inset will be positioned to the left
1912                 // of xx:yy
1913                 if (sl.text()) {
1914                         bool boundary_i = boundary && i + 1 == dit.depth();
1915                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
1916                         if (rtl)
1917                                 x -= lastw;
1918                 }
1919
1920                 // remember width for the case that sl.inset() is positioned in an RTL inset
1921                 if (i && dit[i - 1].text()) {
1922                         // If this Inset is inside a Text Inset, retrieve the Dimension
1923                         // from the containing text instead of using Inset::dimension() which
1924                         // might not be implemented.
1925                         // FIXME (Abdel 23/09/2007): this is a bit messy because of the
1926                         // elimination of Inset::dim_ cache. This coordOffset() method needs
1927                         // to be rewritten in light of the new design.
1928                         Dimension const & dim = parMetrics(dit[i - 1].text(),
1929                                 dit[i - 1].pit()).insetDimension(&sl.inset());
1930                         lastw = dim.wid;
1931                 } else {
1932                         Dimension const dim = sl.inset().dimension(*this);
1933                         lastw = dim.wid;
1934                 }
1935
1936                 //lyxerr << "Cursor::getPos, i: "
1937                 // << i << " x: " << xx << " y: " << y << endl;
1938         }
1939
1940         // Add contribution of initial rows of outermost paragraph
1941         CursorSlice const & sl = dit[0];
1942         TextMetrics const & tm = textMetrics(sl.text());
1943         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
1944         BOOST_ASSERT(!pm.rows().empty());
1945         y -= pm.rows()[0].ascent();
1946 #if 1
1947         // FIXME: document this mess
1948         size_t rend;
1949         if (sl.pos() > 0 && dit.depth() == 1) {
1950                 int pos = sl.pos();
1951                 if (pos && boundary)
1952                         --pos;
1953 //              lyxerr << "coordOffset: boundary:" << boundary << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
1954                 rend = pm.pos2row(pos);
1955         } else
1956                 rend = pm.pos2row(sl.pos());
1957 #else
1958         size_t rend = pm.pos2row(sl.pos());
1959 #endif
1960         for (size_t rit = 0; rit != rend; ++rit)
1961                 y += pm.rows()[rit].height();
1962         y += pm.rows()[rend].ascent();
1963
1964         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
1965
1966         // Make relative position from the nested inset now bufferview absolute.
1967         int xx = bottom_tm.cursorX(dit.bottom(), boundary && dit.depth() == 1);
1968         x += xx;
1969
1970         // In the RTL case place the nested inset at the left of the cursor in
1971         // the outer paragraph
1972         bool boundary_1 = boundary && 1 == dit.depth();
1973         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
1974         if (rtl)
1975                 x -= lastw;
1976
1977         return Point(x, y);
1978 }
1979
1980
1981 Point BufferView::getPos(DocIterator const & dit, bool boundary) const
1982 {
1983         CursorSlice const & bot = dit.bottom();
1984         TextMetrics const & tm = textMetrics(bot.text());
1985         if (!tm.has(bot.pit()))
1986                 return Point(-1, -1);
1987
1988         Point p = coordOffset(dit, boundary); // offset from outer paragraph
1989         p.y_ += tm.parMetrics(bot.pit()).position();
1990         return p;
1991 }
1992
1993
1994 void BufferView::draw(frontend::Painter & pain)
1995 {
1996         LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
1997         Text & text = buffer_.text();
1998         TextMetrics const & tm = d->text_metrics_[&text];
1999         int const y = tm.first().second->position();
2000         PainterInfo pi(this, pain);
2001
2002         switch (d->update_strategy_) {
2003
2004         case NoScreenUpdate:
2005                 // If no screen painting is actually needed, only some the different
2006                 // coordinates of insets and paragraphs needs to be updated.
2007                 pi.full_repaint = true;
2008                 pi.pain.setDrawingEnabled(false);
2009                 tm.draw(pi, 0, y);
2010                 break;
2011
2012         case SingleParUpdate:
2013                 pi.full_repaint = false;
2014                 // In general, only the current row of the outermost paragraph
2015                 // will be redrawn. Particular cases where selection spans
2016                 // multiple paragraph are correctly detected in TextMetrics.
2017                 tm.draw(pi, 0, y);
2018                 break;
2019
2020         case DecorationUpdate:
2021                 // FIXME: We should also distinguish DecorationUpdate to avoid text
2022                 // drawing if possible. This is not possible to do easily right now
2023                 // because of the single backing pixmap.
2024
2025         case FullScreenUpdate:
2026                 // The whole screen, including insets, will be refreshed.
2027                 pi.full_repaint = true;
2028
2029                 // Clear background.
2030                 pain.fillRectangle(0, 0, width_, height_,
2031                         buffer_.inset().backgroundColor());
2032
2033                 // Draw everything.
2034                 tm.draw(pi, 0, y);
2035
2036                 // and possibly grey out below
2037                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2038                 int const y2 = lastpm.second->position() + lastpm.second->descent();
2039                 if (y2 < height_)
2040                         pain.fillRectangle(0, y2, width_, height_ - y2, Color_bottomarea);
2041                 break;
2042         }
2043         LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
2044
2045         // The scrollbar needs an update.
2046         updateScrollbar();
2047
2048         // Normalize anchor for next time
2049         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
2050         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2051         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
2052                 ParagraphMetrics const & pm = tm.parMetrics(pit);
2053                 if (pm.position() + pm.descent() > 0) {
2054                         d->anchor_pit_ = pit;
2055                         d->anchor_ypos_ = pm.position();
2056                         break;
2057                 }
2058         }
2059         LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
2060                 << "  anchor ypos = " << d->anchor_ypos_);
2061 }
2062
2063
2064 void BufferView::message(docstring const & msg)
2065 {
2066         if (d->gui_)
2067                 d->gui_->message(msg);
2068 }
2069
2070
2071 void BufferView::showDialog(string const & name)
2072 {
2073         if (d->gui_)
2074                 d->gui_->showDialog(name, string());
2075 }
2076
2077
2078 void BufferView::showDialog(string const & name,
2079         string const & data, Inset * inset)
2080 {
2081         if (d->gui_)
2082                 d->gui_->showDialog(name, data, inset);
2083 }
2084
2085
2086 void BufferView::updateDialog(string const & name, string const & data)
2087 {
2088         if (d->gui_)
2089                 d->gui_->updateDialog(name, data);
2090 }
2091
2092
2093 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
2094 {
2095         d->gui_ = gui;
2096 }
2097
2098
2099 // FIXME: Move this out of BufferView again
2100 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
2101 {
2102         if (!fname.isReadableFile()) {
2103                 docstring const error = from_ascii(strerror(errno));
2104                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2105                 docstring const text =
2106                   bformat(_("Could not read the specified document\n"
2107                             "%1$s\ndue to the error: %2$s"), file, error);
2108                 Alert::error(_("Could not read file"), text);
2109                 return docstring();
2110         }
2111
2112         if (!fname.isReadableFile()) {
2113                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2114                 docstring const text =
2115                   bformat(_("%1$s\n is not readable."), file);
2116                 Alert::error(_("Could not open file"), text);
2117                 return docstring();
2118         }
2119
2120         // FIXME UNICODE: We don't know the encoding of the file
2121         docstring file_content = fname.fileContents("UTF-8");
2122         if (file_content.empty()) {
2123                 Alert::error(_("Reading not UTF-8 encoded file"),
2124                              _("The file is not UTF-8 encoded.\n"
2125                                "It will be read as local 8Bit-encoded.\n"
2126                                "If this does not give the correct result\n"
2127                                "then please change the encoding of the file\n"
2128                                "to UTF-8 with a program other than LyX.\n"));
2129                 file_content = fname.fileContents("local8bit");
2130         }
2131
2132         return normalize_c(file_content);
2133 }
2134
2135
2136 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
2137 {
2138         docstring const tmpstr = contentsOfPlaintextFile(f);
2139
2140         if (tmpstr.empty())
2141                 return;
2142
2143         Cursor & cur = cursor();
2144         cap::replaceSelection(cur);
2145         buffer_.undo().recordUndo(cur);
2146         if (asParagraph)
2147                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr);
2148         else
2149                 cur.innerText()->insertStringAsLines(cur, tmpstr);
2150
2151         updateMetrics();
2152         buffer_.changed();
2153 }
2154
2155 } // namespace lyx