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 // Put this user variable in lyxrc or pass it through setFullScreen()
 290 static int const max_row_width = 700;
 291
 292 int BufferView::rightMargin() const
 293 {
 294         if (!full_screen_ || width_ < max_row_width + 20)
 295                 return 10;
 296
 297         return (width_ - max_row_width) / 2;
 298 }
 299
 300
 301 int BufferView::leftMargin() const
 302 {
 303         return rightMargin();
 304 }
 305
 306
 307 Intl & BufferView::getIntl()
 308 {
 309         return d->intl_;
 310 }
 311
 312
 313 Intl const & BufferView::getIntl() const
 314 {
 315         return d->intl_;
 316 }
 317
 318
 319 CoordCache & BufferView::coordCache()
 320 {
 321         return d->coord_cache_;
 322 }
 323
 324
 325 CoordCache const & BufferView::coordCache() const
 326 {
 327         return d->coord_cache_;
 328 }
 329
 330
 331 Buffer & BufferView::buffer()
 332 {
 333         return buffer_;
 334 }
 335
 336
 337 Buffer const & BufferView::buffer() const
 338 {
 339         return buffer_;
 340 }
 341
 342
 343 bool BufferView::fitCursor()
 344 {
 345         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
 346                 frontend::FontMetrics const & fm =
 347                         theFontMetrics(d->cursor_.getFont().fontInfo());
 348                 int const asc = fm.maxAscent();
 349                 int const des = fm.maxDescent();
 350                 Point const p = getPos(d->cursor_, d->cursor_.boundary());
 351                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 352                         return false;
 353         }
 354         return true;
 355 }
 356
 357
 358 void BufferView::processUpdateFlags(Update::flags flags)
 359 {
 360         // last_inset_ points to the last visited inset. This pointer may become
 361         // invalid because of keyboard editing. Since all such operations
 362         // causes screen update(), I reset last_inset_ to avoid such a problem.
 363         d->last_inset_ = 0;
 364         // This is close to a hot-path.
 365         LYXERR(Debug::DEBUG, "BufferView::processUpdateFlags()"
 366                 << "[fitcursor = " << (flags & Update::FitCursor)
 367                 << ", forceupdate = " << (flags & Update::Force)
 368                 << ", singlepar = " << (flags & Update::SinglePar)
 369                 << "]  buffer: " << &buffer_);
 370
 371         buffer_.updateMacros();
 372
 373         // Now do the first drawing step if needed. This consists on updating
 374         // the CoordCache in updateMetrics().
 375         // The second drawing step is done in WorkArea::redraw() if needed.
 376
 377         // Case when no explicit update is requested.
 378         if (!flags) {
 379                 // no need to redraw anything.
 380                 d->update_strategy_ = NoScreenUpdate;
 381                 return;
 382         }
 383
 384         if (flags == Update::Decoration) {
 385                 d->update_strategy_ = DecorationUpdate;
 386                 buffer_.changed();
 387                 return;
 388         }
 389
 390         if (flags == Update::FitCursor
 391                 || flags == (Update::Decoration | Update::FitCursor)) {
 392                 // tell the frontend to update the screen if needed.
 393                 if (fitCursor()) {
 394                         showCursor();
 395                         return;
 396                 }
 397                 if (flags & Update::Decoration) {
 398                         d->update_strategy_ = DecorationUpdate;
 399                         buffer_.changed();
 400                         return;
 401                 }
 402                 // no screen update is needed.
 403                 d->update_strategy_ = NoScreenUpdate;
 404                 return;
 405         }
 406
 407         bool const full_metrics = flags & Update::Force || !singleParUpdate();
 408
 409         if (full_metrics)
 410                 // We have to update the full screen metrics.
 411                 updateMetrics();
 412
 413         if (!(flags & Update::FitCursor)) {
 414                 // Nothing to do anymore. Trigger a redraw and return
 415                 buffer_.changed();
 416                 return;
 417         }
 418
 419         // updateMetrics() does not update paragraph position
 420         // This is done at draw() time. So we need a redraw!
 421         buffer_.changed();
 422
 423         if (fitCursor()) {
 424                 // The cursor is off screen so ensure it is visible.
 425                 // refresh it:
 426                 showCursor();
 427         }
 428 }
 429
 430
 431 void BufferView::updateScrollbar()
 432 {
 433         if (height_ == 0)
 434                 return;
 435
 436         // We prefer fixed size line scrolling.
 437         d->scrollbarParameters_.single_step = defaultRowHeight();
 438         // We prefer full screen page scrolling.
 439         d->scrollbarParameters_.page_step = height_;
 440
 441         Text & t = buffer_.text();
 442         TextMetrics & tm = d->text_metrics_[&t];
 443
 444         LYXERR(Debug::GUI, " Updating scrollbar: height: "
 445                 << t.paragraphs().size()
 446                 << " curr par: " << d->cursor_.bottom().pit()
 447                 << " default height " << defaultRowHeight());
 448
 449         size_t const parsize = t.paragraphs().size();
 450         if (d->par_height_.size() != parsize) {
 451                 d->par_height_.clear();
 452                 // FIXME: We assume a default paragraph height of 2 rows. This
 453                 // should probably be pondered with the screen width.
 454                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
 455         }
 456
 457         // Look at paragraph heights on-screen
 458         pair<pit_type, ParagraphMetrics const *> first = tm.first();
 459         pair<pit_type, ParagraphMetrics const *> last = tm.last();
 460         for (pit_type pit = first.first; pit <= last.first; ++pit) {
 461                 d->par_height_[pit] = tm.parMetrics(pit).height();
 462                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
 463                         << d->par_height_[pit]);
 464         }
 465
 466         int top_pos = first.second->position() - first.second->ascent();
 467         int bottom_pos = last.second->position() + last.second->descent();
 468         bool first_visible = first.first == 0 && top_pos >= 0;
 469         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
 470         if (first_visible && last_visible) {
 471                 d->scrollbarParameters_.min = 0;
 472                 d->scrollbarParameters_.max = 0;
 473                 return;
 474         }
 475
 476         d->scrollbarParameters_.min = top_pos;
 477         for (size_t i = 0; i != size_t(first.first); ++i)
 478                 d->scrollbarParameters_.min -= d->par_height_[i];
 479         d->scrollbarParameters_.max = bottom_pos;
 480         for (size_t i = last.first + 1; i != parsize; ++i)
 481                 d->scrollbarParameters_.max += d->par_height_[i];
 482
 483         d->scrollbarParameters_.position = 0;
 484         // The reference is the top position so we remove one page.
 485         d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 486 }
 487
 488
 489 ScrollbarParameters const & BufferView::scrollbarParameters() const
 490 {
 491         return d->scrollbarParameters_;
 492 }
 493
 494
 495 docstring BufferView::toolTip(int x, int y) const
 496 {
 497         // Get inset under mouse, if there is one.
 498         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 499         if (!covering_inset)
 500                 // No inset, no tooltip...
 501                 return docstring();
 502         return covering_inset->toolTip(*this, x, y);
 503 }
 504
 505
 506 docstring BufferView::contextMenu(int x, int y) const
 507 {
 508         // Get inset under mouse, if there is one.
 509         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 510         if (covering_inset)
 511                 return covering_inset->contextMenu(*this, x, y);
 512
 513         // FIXME: Do something more elaborate here.
 514         return from_ascii("edit");
 515 }
 516
 517
 518 void BufferView::scrollDocView(int value)
 519 {
 520         int const offset = value - d->scrollbarParameters_.position;
 521         // If the offset is less than 2 screen height, prefer to scroll instead.
 522         if (abs(offset) <= 2 * height_) {
 523                 scroll(offset);
 524                 return;
 525         }
 526
 527         // cut off at the top
 528         if (value <= d->scrollbarParameters_.min) {
 529                 DocIterator dit = doc_iterator_begin(buffer_.inset());
 530                 showCursor(dit);
 531                 LYXERR(Debug::SCROLLING, "scroll to top");
 532                 return;
 533         }
 534
 535         // cut off at the bottom
 536         if (value >= d->scrollbarParameters_.max) {
 537                 DocIterator dit = doc_iterator_end(buffer_.inset());
 538                 dit.backwardPos();
 539                 showCursor(dit);
 540                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 541                 return;
 542         }
 543
 544         // find paragraph at target position
 545         int par_pos = d->scrollbarParameters_.min;
 546         pit_type i = 0;
 547         for (; i != int(d->par_height_.size()); ++i) {
 548                 par_pos += d->par_height_[i];
 549                 if (par_pos >= value)
 550                         break;
 551         }
 552
 553         if (par_pos < value) {
 554                 // It seems we didn't find the correct pit so stay on the safe side and
 555                 // scroll to bottom.
 556                 LYXERR0("scrolling position not found!");
 557                 scrollDocView(d->scrollbarParameters_.max);
 558                 return;
 559         }
 560
 561         DocIterator dit = doc_iterator_begin(buffer_.inset());
 562         dit.pit() = i;
 563         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 564         showCursor(dit);
 565 }
 566
 567
 568 // FIXME: this method is not working well.
 569 void BufferView::setCursorFromScrollbar()
 570 {
 571         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 572
 573         int const height = 2 * defaultRowHeight();
 574         int const first = height;
 575         int const last = height_ - height;
 576         Cursor & cur = d->cursor_;
 577
 578         switch (cursorStatus(cur)) {
 579         case CUR_ABOVE:
 580                 // We reset the cursor because cursorStatus() does not
 581                 // work when the cursor is within mathed.
 582                 cur.reset(buffer_.inset());
 583                 tm.setCursorFromCoordinates(cur, 0, first);
 584                 cur.clearSelection();
 585                 break;
 586         case CUR_BELOW:
 587                 // We reset the cursor because cursorStatus() does not
 588                 // work when the cursor is within mathed.
 589                 cur.reset(buffer_.inset());
 590                 tm.setCursorFromCoordinates(cur, 0, last);
 591                 cur.clearSelection();
 592                 break;
 593         case CUR_INSIDE:
 594                 int const y = getPos(cur, cur.boundary()).y_;
 595                 int const newy = min(last, max(y, first));
 596                 if (y != newy) {
 597                         cur.reset(buffer_.inset());
 598                         tm.setCursorFromCoordinates(cur, 0, newy);
 599                 }
 600         }
 601 }
 602
 603
 604 Change const BufferView::getCurrentChange() const
 605 {
 606         if (!d->cursor_.selection())
 607                 return Change(Change::UNCHANGED);
 608
 609         DocIterator dit = d->cursor_.selectionBegin();
 610         return dit.paragraph().lookupChange(dit.pos());
 611 }
 612
 613
 614 // this could be used elsewhere as well?
 615 // FIXME: This does not work within mathed!
 616 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 617 {
 618         Point const p = getPos(dit, dit.boundary());
 619         if (p.y_ < 0)
 620                 return CUR_ABOVE;
 621         if (p.y_ > workHeight())
 622                 return CUR_BELOW;
 623         return CUR_INSIDE;
 624 }
 625
 626
 627 void BufferView::saveBookmark(unsigned int idx)
 628 {
 629         // tenatively save bookmark, id and pos will be used to
 630         // acturately locate a bookmark in a 'live' lyx session.
 631         // pit and pos will be updated with bottom level pit/pos
 632         // when lyx exits.
 633         LyX::ref().session().bookmarks().save(
 634                 buffer_.fileName(),
 635                 d->cursor_.bottom().pit(),
 636                 d->cursor_.bottom().pos(),
 637                 d->cursor_.paragraph().id(),
 638                 d->cursor_.pos(),
 639                 idx
 640         );
 641         if (idx)
 642                 // emit message signal.
 643                 message(_("Save bookmark"));
 644 }
 645
 646
 647 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 648         int top_id, pos_type top_pos)
 649 {
 650         bool success = false;
 651         DocIterator dit;
 652
 653         d->cursor_.clearSelection();
 654
 655         // if a valid par_id is given, try it first
 656         // This is the case for a 'live' bookmark when unique paragraph ID
 657         // is used to track bookmarks.
 658         if (top_id > 0) {
 659                 dit = buffer_.getParFromID(top_id);
 660                 if (!dit.atEnd()) {
 661                         dit.pos() = min(dit.paragraph().size(), top_pos);
 662                         // Some slices of the iterator may not be
 663                         // reachable (e.g. closed collapsable inset)
 664                         // so the dociterator may need to be
 665                         // shortened. Otherwise, setCursor may crash
 666                         // lyx when the cursor can not be set to these
 667                         // insets.
 668                         size_t const n = dit.depth();
 669                         for (size_t i = 0; i < n; ++i)
 670                                 if (dit[i].inset().editable() != Inset::HIGHLY_EDITABLE) {
 671                                         dit.resize(i);
 672                                         break;
 673                                 }
 674                         success = true;
 675                 }
 676         }
 677
 678         // if top_id == 0, or searching through top_id failed
 679         // This is the case for a 'restored' bookmark when only bottom
 680         // (document level) pit was saved. Because of this, bookmark
 681         // restoration is inaccurate. If a bookmark was within an inset,
 682         // it will be restored to the left of the outmost inset that contains
 683         // the bookmark.
 684         if (bottom_pit < int(buffer_.paragraphs().size())) {
 685                 dit = doc_iterator_begin(buffer_.inset());
 686
 687                 dit.pit() = bottom_pit;
 688                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 689                 success = true;
 690         }
 691
 692         if (success) {
 693                 // Note: only bottom (document) level pit is set.
 694                 setCursor(dit);
 695                 // set the current font.
 696                 d->cursor_.setCurrentFont();
 697                 // To center the screen on this new position we need the
 698                 // paragraph position which is computed at draw() time.
 699                 // So we need a redraw!
 700                 buffer_.changed();
 701                 if (fitCursor())
 702                         showCursor();
 703         }
 704
 705         return success;
 706 }
 707
 708
 709 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 710 {
 711         if (lyxrc.rtl_support) {
 712                 if (d->cursor_.real_current_font.isRightToLeft()) {
 713                         if (d->intl_.keymap == Intl::PRIMARY)
 714                                 d->intl_.keyMapSec();
 715                 } else {
 716                         if (d->intl_.keymap == Intl::SECONDARY)
 717                                 d->intl_.keyMapPrim();
 718                 }
 719         }
 720
 721         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 722 }
 723
 724
 725 int BufferView::workWidth() const
 726 {
 727         return width_;
 728 }
 729
 730
 731 void BufferView::showCursor()
 732 {
 733         showCursor(d->cursor_);
 734 }
 735
 736
 737 void BufferView::showCursor(DocIterator const & dit)
 738 {
 739         // We are not properly started yet, delay until resizing is
 740         // done.
 741         if (height_ == 0)
 742                 return;
 743
 744         LYXERR(Debug::SCROLLING, "recentering!");
 745
 746         CursorSlice const & bot = dit.bottom();
 747         TextMetrics & tm = d->text_metrics_[bot.text()];
 748
 749         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 750         int bot_pit = bot.pit();
 751         if (bot_pit > max_pit) {
 752                 // FIXME: Why does this happen?
 753                 LYXERR0("bottom pit is greater that max pit: "
 754                         << bot_pit << " > " << max_pit);
 755                 bot_pit = max_pit;
 756         }
 757
 758         if (bot_pit == tm.first().first - 1)
 759                 tm.newParMetricsUp();
 760         else if (bot_pit == tm.last().first + 1)
 761                 tm.newParMetricsDown();
 762
 763         if (tm.has(bot_pit)) {
 764                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 765                 BOOST_ASSERT(!pm.rows().empty());
 766                 // FIXME: smooth scrolling doesn't work in mathed.
 767                 CursorSlice const & cs = dit.innerTextSlice();
 768                 int offset = coordOffset(dit, dit.boundary()).y_;
 769                 int ypos = pm.position() + offset;
 770                 Dimension const & row_dim =
 771                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 772                 if (ypos - row_dim.ascent() < 0)
 773                         scrollUp(- ypos + row_dim.ascent());
 774                 else if (ypos + row_dim.descent() > height_)
 775                         scrollDown(ypos - height_ + row_dim.descent());
 776                 // else, nothing to do, the cursor is already visible so we just return.
 777                 return;
 778         }
 779
 780         tm.redoParagraph(bot_pit);
 781         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 782         int offset = coordOffset(dit, dit.boundary()).y_;
 783
 784         d->anchor_pit_ = bot_pit;
 785         CursorSlice const & cs = dit.innerTextSlice();
 786         Dimension const & row_dim =
 787                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 788
 789         if (d->anchor_pit_ == 0)
 790                 d->anchor_ypos_ = offset + pm.ascent();
 791         else if (d->anchor_pit_ == max_pit)
 792                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
 793         else
 794                 d->anchor_ypos_ = defaultRowHeight() * 2 - offset - row_dim.descent();
 795
 796         updateMetrics();
 797         buffer_.changed();
 798 }
 799
 800
 801 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 802 {
 803         FuncStatus flag;
 804
 805         Cursor & cur = d->cursor_;
 806
 807         switch (cmd.action) {
 808
 809         case LFUN_UNDO:
 810                 flag.enabled(buffer_.undo().hasUndoStack());
 811                 break;
 812         case LFUN_REDO:
 813                 flag.enabled(buffer_.undo().hasRedoStack());
 814                 break;
 815         case LFUN_FILE_INSERT:
 816         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 817         case LFUN_FILE_INSERT_PLAINTEXT:
 818         case LFUN_BOOKMARK_SAVE:
 819                 // FIXME: Actually, these LFUNS should be moved to Text
 820                 flag.enabled(cur.inTexted());
 821                 break;
 822         case LFUN_FONT_STATE:
 823         case LFUN_LABEL_INSERT:
 824         case LFUN_INFO_INSERT:
 825         case LFUN_PARAGRAPH_GOTO:
 826         case LFUN_NOTE_NEXT:
 827         case LFUN_REFERENCE_NEXT:
 828         case LFUN_WORD_FIND:
 829         case LFUN_WORD_REPLACE:
 830         case LFUN_MARK_OFF:
 831         case LFUN_MARK_ON:
 832         case LFUN_MARK_TOGGLE:
 833         case LFUN_SCREEN_RECENTER:
 834         case LFUN_BIBTEX_DATABASE_ADD:
 835         case LFUN_BIBTEX_DATABASE_DEL:
 836         case LFUN_STATISTICS:
 837         case LFUN_NEXT_INSET_TOGGLE:
 838                 flag.enabled(true);
 839                 break;
 840
 841         case LFUN_LABEL_GOTO: {
 842                 flag.enabled(!cmd.argument().empty()
 843                     || getInsetByCode<InsetRef>(cur, REF_CODE));
 844                 break;
 845         }
 846
 847         case LFUN_CHANGES_TRACK:
 848                 flag.enabled(true);
 849                 flag.setOnOff(buffer_.params().trackChanges);
 850                 break;
 851
 852         case LFUN_CHANGES_OUTPUT:
 853                 flag.enabled(true);
 854                 flag.setOnOff(buffer_.params().outputChanges);
 855                 break;
 856
 857         case LFUN_CHANGES_MERGE:
 858         case LFUN_CHANGE_NEXT:
 859         case LFUN_ALL_CHANGES_ACCEPT:
 860         case LFUN_ALL_CHANGES_REJECT:
 861                 // TODO: context-sensitive enabling of LFUNs
 862                 // In principle, these command should only be enabled if there
 863                 // is a change in the document. However, without proper
 864                 // optimizations, this will inevitably result in poor performance.
 865                 flag.enabled(true);
 866                 break;
 867
 868         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 869                 flag.setOnOff(buffer_.params().compressed);
 870                 break;
 871         }
 872
 873         case LFUN_BUFFER_TOGGLE_EMBEDDING: {
 874                 flag.setOnOff(buffer_.params().embedded);
 875                 break;
 876         }
 877
 878         case LFUN_SCREEN_UP:
 879         case LFUN_SCREEN_DOWN:
 880         case LFUN_SCROLL:
 881                 flag.enabled(true);
 882                 break;
 883
 884         // FIXME: LFUN_SCREEN_DOWN_SELECT should be removed from
 885         // everywhere else before this can enabled:
 886         case LFUN_SCREEN_UP_SELECT:
 887         case LFUN_SCREEN_DOWN_SELECT:
 888                 flag.enabled(false);
 889                 break;
 890
 891         case LFUN_LAYOUT_TABULAR:
 892                 flag.enabled(cur.innerInsetOfType(TABULAR_CODE));
 893                 break;
 894
 895         case LFUN_LAYOUT:
 896         case LFUN_LAYOUT_PARAGRAPH:
 897                 flag.enabled(cur.inset().forceDefaultParagraphs(cur.idx()));
 898                 break;
 899
 900         case LFUN_INSET_SETTINGS: {
 901                 InsetCode code = cur.inset().lyxCode();
 902                 bool enable = false;
 903                 switch (code) {
 904                         case TABULAR_CODE:
 905                                 enable = cmd.argument() == "tabular";
 906                                 break;
 907                         case ERT_CODE:
 908                                 enable = cmd.argument() == "ert";
 909                                 break;
 910                         case FLOAT_CODE:
 911                                 enable = cmd.argument() == "float";
 912                                 break;
 913                         case WRAP_CODE:
 914                                 enable = cmd.argument() == "wrap";
 915                                 break;
 916                         case NOTE_CODE:
 917                                 enable = cmd.argument() == "note";
 918                                 break;
 919                         case BRANCH_CODE:
 920                                 enable = cmd.argument() == "branch";
 921                                 break;
 922                         case BOX_CODE:
 923                                 enable = cmd.argument() == "box";
 924                                 break;
 925                         case LISTINGS_CODE:
 926                                 enable = cmd.argument() == "listings";
 927                                 break;
 928                         default:
 929                                 break;
 930                 }
 931                 flag.enabled(enable);
 932                 break;
 933         }
 934
 935         case LFUN_DIALOG_SHOW_NEW_INSET:
 936                 flag.enabled(cur.inset().lyxCode() != ERT_CODE &&
 937                         cur.inset().lyxCode() != LISTINGS_CODE);
 938                 if (cur.inset().lyxCode() == CAPTION_CODE) {
 939                         FuncStatus flag;
 940                         if (cur.inset().getStatus(cur, cmd, flag))
 941                                 return flag;
 942                 }
 943                 break;
 944
 945         default:
 946                 flag.enabled(false);
 947         }
 948
 949         return flag;
 950 }
 951
 952
 953 bool BufferView::dispatch(FuncRequest const & cmd)
 954 {
 955         //lyxerr << [ cmd = " << cmd << "]" << endl;
 956
 957         // Make sure that the cached BufferView is correct.
 958         LYXERR(Debug::ACTION, " action[" << cmd.action << ']'
 959                 << " arg[" << to_utf8(cmd.argument()) << ']'
 960                 << " x[" << cmd.x << ']'
 961                 << " y[" << cmd.y << ']'
 962                 << " button[" << cmd.button() << ']');
 963
 964         Cursor & cur = d->cursor_;
 965
 966         switch (cmd.action) {
 967
 968         case LFUN_UNDO:
 969                 cur.message(_("Undo"));
 970                 cur.clearSelection();
 971                 if (!cur.textUndo())
 972                         cur.message(_("No further undo information"));
 973                 else
 974                         processUpdateFlags(Update::Force | Update::FitCursor);
 975                 break;
 976
 977         case LFUN_REDO:
 978                 cur.message(_("Redo"));
 979                 cur.clearSelection();
 980                 if (!cur.textRedo())
 981                         cur.message(_("No further redo information"));
 982                 else
 983                         processUpdateFlags(Update::Force | Update::FitCursor);
 984                 break;
 985
 986         case LFUN_FONT_STATE:
 987                 cur.message(cur.currentState());
 988                 break;
 989
 990         case LFUN_BOOKMARK_SAVE:
 991                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
 992                 break;
 993
 994         case LFUN_LABEL_GOTO: {
 995                 docstring label = cmd.argument();
 996                 if (label.empty()) {
 997                         InsetRef * inset =
 998                                 getInsetByCode<InsetRef>(d->cursor_,
 999                                                          REF_CODE);
1000                         if (inset) {
1001                                 label = inset->getParam("reference");
1002                                 // persistent=false: use temp_bookmark
1003                                 saveBookmark(0);
1004                         }
1005                 }
1006
1007                 if (!label.empty())
1008                         gotoLabel(label);
1009                 break;
1010         }
1011
1012         case LFUN_PARAGRAPH_GOTO: {
1013                 int const id = convert<int>(to_utf8(cmd.argument()));
1014                 int i = 0;
1015                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1016                         b = theBufferList().next(b)) {
1017
1018                         DocIterator dit = b->getParFromID(id);
1019                         if (dit.atEnd()) {
1020                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1021                         } else {
1022                                 LYXERR(Debug::INFO, "Paragraph " << dit.paragraph().id()
1023                                         << " found in buffer `"
1024                                         << b->absFileName() << "'.");
1025
1026                                 if (b == &buffer_) {
1027                                         // Set the cursor
1028                                         setCursor(dit);
1029                                         showCursor();
1030                                 } else {
1031                                         // Switch to other buffer view and resend cmd
1032                                         theLyXFunc().dispatch(FuncRequest(
1033                                                 LFUN_BUFFER_SWITCH, b->absFileName()));
1034                                         theLyXFunc().dispatch(cmd);
1035                                 }
1036                                 break;
1037                         }
1038                         ++i;
1039                 }
1040                 break;
1041         }
1042
1043         case LFUN_NOTE_NEXT:
1044                 gotoInset(this, NOTE_CODE, false);
1045                 break;
1046
1047         case LFUN_REFERENCE_NEXT: {
1048                 vector<InsetCode> tmp;
1049                 tmp.push_back(LABEL_CODE);
1050                 tmp.push_back(REF_CODE);
1051                 gotoInset(this, tmp, true);
1052                 break;
1053         }
1054
1055         case LFUN_CHANGES_TRACK:
1056                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
1057                 break;
1058
1059         case LFUN_CHANGES_OUTPUT:
1060                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
1061                 if (buffer_.params().outputChanges) {
1062                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
1063                         bool xcolorsoul = LaTeXFeatures::isAvailable("soul") &&
1064                                           LaTeXFeatures::isAvailable("xcolor");
1065
1066                         if (!dvipost && !xcolorsoul) {
1067                                 Alert::warning(_("Changes not shown in LaTeX output"),
1068                                                _("Changes will not be highlighted in LaTeX output, "
1069                                                  "because neither dvipost nor xcolor/soul are installed.\n"
1070                                                  "Please install these packages or redefine "
1071                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1072                         } else if (!xcolorsoul) {
1073                                 Alert::warning(_("Changes not shown in LaTeX output"),
1074                                                _("Changes will not be highlighted in LaTeX output "
1075                                                  "when using pdflatex, because xcolor and soul are not installed.\n"
1076                                                  "Please install both packages or redefine "
1077                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1078                         }
1079                 }
1080                 break;
1081
1082         case LFUN_CHANGE_NEXT:
1083                 findNextChange(this);
1084                 break;
1085
1086         case LFUN_CHANGES_MERGE:
1087                 if (findNextChange(this))
1088                         showDialog("changes");
1089                 break;
1090
1091         case LFUN_ALL_CHANGES_ACCEPT:
1092                 // select complete document
1093                 d->cursor_.reset(buffer_.inset());
1094                 d->cursor_.selHandle(true);
1095                 buffer_.text().cursorBottom(d->cursor_);
1096                 // accept everything in a single step to support atomic undo
1097                 buffer_.text().acceptOrRejectChanges(d->cursor_, Text::ACCEPT);
1098                 break;
1099
1100         case LFUN_ALL_CHANGES_REJECT:
1101                 // select complete document
1102                 d->cursor_.reset(buffer_.inset());
1103                 d->cursor_.selHandle(true);
1104                 buffer_.text().cursorBottom(d->cursor_);
1105                 // reject everything in a single step to support atomic undo
1106                 // Note: reject does not work recursively; the user may have to repeat the operation
1107                 buffer_.text().acceptOrRejectChanges(d->cursor_, Text::REJECT);
1108                 break;
1109
1110         case LFUN_WORD_FIND:
1111                 find(this, cmd);
1112                 break;
1113
1114         case LFUN_WORD_REPLACE: {
1115                 bool has_deleted = false;
1116                 if (cur.selection()) {
1117                         DocIterator beg = cur.selectionBegin();
1118                         DocIterator end = cur.selectionEnd();
1119                         if (beg.pit() == end.pit()) {
1120                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1121                                         if (cur.paragraph().isDeleted(p))
1122                                                 has_deleted = true;
1123                                 }
1124                         }
1125                 }
1126                 replace(this, cmd, has_deleted);
1127                 break;
1128         }
1129
1130         case LFUN_MARK_OFF:
1131                 cur.clearSelection();
1132                 cur.resetAnchor();
1133                 cur.message(from_utf8(N_("Mark off")));
1134                 break;
1135
1136         case LFUN_MARK_ON:
1137                 cur.clearSelection();
1138                 cur.mark() = true;
1139                 cur.resetAnchor();
1140                 cur.message(from_utf8(N_("Mark on")));
1141                 break;
1142
1143         case LFUN_MARK_TOGGLE:
1144                 cur.clearSelection();
1145                 if (cur.mark()) {
1146                         cur.mark() = false;
1147                         cur.message(from_utf8(N_("Mark removed")));
1148                 } else {
1149                         cur.mark() = true;
1150                         cur.message(from_utf8(N_("Mark set")));
1151                 }
1152                 cur.resetAnchor();
1153                 break;
1154
1155         case LFUN_SCREEN_RECENTER:
1156                 showCursor();
1157                 break;
1158
1159         case LFUN_BIBTEX_DATABASE_ADD: {
1160                 Cursor tmpcur = d->cursor_;
1161                 findInset(tmpcur, BIBTEX_CODE, false);
1162                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1163                                                 BIBTEX_CODE);
1164                 if (inset) {
1165                         if (inset->addDatabase(to_utf8(cmd.argument())))
1166                                 buffer_.updateBibfilesCache();
1167                 }
1168                 break;
1169         }
1170
1171         case LFUN_BIBTEX_DATABASE_DEL: {
1172                 Cursor tmpcur = d->cursor_;
1173                 findInset(tmpcur, BIBTEX_CODE, false);
1174                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1175                                                 BIBTEX_CODE);
1176                 if (inset) {
1177                         if (inset->delDatabase(to_utf8(cmd.argument())))
1178                                 buffer_.updateBibfilesCache();
1179                 }
1180                 break;
1181         }
1182
1183         case LFUN_STATISTICS: {
1184                 DocIterator from, to;
1185                 if (cur.selection()) {
1186                         from = cur.selectionBegin();
1187                         to = cur.selectionEnd();
1188                 } else {
1189                         from = doc_iterator_begin(buffer_.inset());
1190                         to = doc_iterator_end(buffer_.inset());
1191                 }
1192                 int const words = countWords(from, to);
1193                 int const chars = countChars(from, to, false);
1194                 int const chars_blanks = countChars(from, to, true);
1195                 docstring message;
1196                 if (cur.selection())
1197                         message = _("Statistics for the selection:");
1198                 else
1199                         message = _("Statistics for the document:");
1200                 message += "\n\n";
1201                 if (words != 1)
1202                         message += bformat(_("%1$d words"), words);
1203                 else
1204                         message += _("One word");
1205                 message += "\n";
1206                 if (chars_blanks != 1)
1207                         message += bformat(_("%1$d characters (including blanks)"),
1208                                           chars_blanks);
1209                 else
1210                         message += _("One character (including blanks)");
1211                 message += "\n";
1212                 if (chars != 1)
1213                         message += bformat(_("%1$d characters (excluding blanks)"),
1214                                           chars);
1215                 else
1216                         message += _("One character (excluding blanks)");
1217
1218                 Alert::information(_("Statistics"), message);
1219         }
1220                 break;
1221
1222         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1223                 // turn compression on/off
1224                 buffer_.params().compressed = !buffer_.params().compressed;
1225                 break;
1226
1227         case LFUN_BUFFER_TOGGLE_EMBEDDING: {
1228                 // turn embedding on/off
1229                 try {
1230                         buffer_.embeddedFiles().enable(!buffer_.params().embedded, buffer_);
1231                 } catch (ExceptionMessage const & message) {
1232                         Alert::error(message.title_, message.details_);
1233                 }
1234                 break;
1235         }
1236
1237         case LFUN_NEXT_INSET_TOGGLE: {
1238                 // this is the real function we want to invoke
1239                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
1240                 // if there is an inset at cursor, see whether it
1241                 // wants to toggle.
1242                 Inset * inset = cur.nextInset();
1243                 if (inset) {
1244                         if (inset->isActive()) {
1245                                 Cursor tmpcur = cur;
1246                                 tmpcur.pushBackward(*inset);
1247                                 inset->dispatch(tmpcur, tmpcmd);
1248                                 if (tmpcur.result().dispatched()) {
1249                                         cur.dispatched();
1250                                 }
1251                         } else if (inset->editable() == Inset::IS_EDITABLE) {
1252                                 inset->edit(cur, true);
1253                         }
1254                 }
1255                 // if it did not work, try the underlying inset.
1256                 if (!cur.result().dispatched())
1257                         cur.dispatch(tmpcmd);
1258
1259                 if (!cur.result().dispatched())
1260                         // It did not work too; no action needed.
1261                         break;
1262                 cur.clearSelection();
1263                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1264                 break;
1265         }
1266
1267         case LFUN_SCREEN_UP:
1268         case LFUN_SCREEN_DOWN: {
1269                 Point p = getPos(cur, cur.boundary());
1270                 if (p.y_ < 0 || p.y_ > height_) {
1271                         // The cursor is off-screen so recenter before proceeding.
1272                         showCursor();
1273                         p = getPos(cur, cur.boundary());
1274                 }
1275                 scroll(cmd.action == LFUN_SCREEN_UP? - height_ : height_);
1276                 cur.reset(buffer_.inset());
1277                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_);
1278                 //FIXME: what to do with cur.x_target()?
1279                 cur.finishUndo();
1280                 break;
1281         }
1282
1283         case LFUN_SCROLL:
1284                 lfunScroll(cmd);
1285                 break;
1286
1287         case LFUN_SCREEN_UP_SELECT:
1288         case LFUN_SCREEN_DOWN_SELECT: {
1289                 // Those two are not ready yet for consumption.
1290                 return false;
1291
1292                 cur.selHandle(true);
1293                 size_t initial_depth = cur.depth();
1294                 Point const p = getPos(cur, cur.boundary());
1295                 scroll(cmd.action == LFUN_SCREEN_UP_SELECT? - height_ : height_);
1296                 // FIXME: We need to verify if the cursor stayed within an inset...
1297                 //cur.reset(buffer_.inset());
1298                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_);
1299                 cur.finishUndo();
1300                 while (cur.depth() > initial_depth) {
1301                         cur.forwardInset();
1302                 }
1303                 // FIXME: we need to do a redraw again because of the selection
1304                 // But no screen update is needed.
1305                 d->update_strategy_ = NoScreenUpdate;
1306                 buffer_.changed();
1307                 break;
1308         }
1309
1310         default:
1311                 return false;
1312         }
1313
1314         return true;
1315 }
1316
1317
1318 docstring const BufferView::requestSelection()
1319 {
1320         Cursor & cur = d->cursor_;
1321
1322         if (!cur.selection()) {
1323                 d->xsel_cache_.set = false;
1324                 return docstring();
1325         }
1326
1327         if (!d->xsel_cache_.set ||
1328             cur.top() != d->xsel_cache_.cursor ||
1329             cur.anchor_.top() != d->xsel_cache_.anchor)
1330         {
1331                 d->xsel_cache_.cursor = cur.top();
1332                 d->xsel_cache_.anchor = cur.anchor_.top();
1333                 d->xsel_cache_.set = cur.selection();
1334                 return cur.selectionAsString(false);
1335         }
1336         return docstring();
1337 }
1338
1339
1340 void BufferView::clearSelection()
1341 {
1342         d->cursor_.clearSelection();
1343         // Clear the selection buffer. Otherwise a subsequent
1344         // middle-mouse-button paste would use the selection buffer,
1345         // not the more current external selection.
1346         cap::clearSelection();
1347         d->xsel_cache_.set = false;
1348         // The buffer did not really change, but this causes the
1349         // redraw we need because we cleared the selection above.
1350         buffer_.changed();
1351 }
1352
1353
1354 void BufferView::resize(int width, int height)
1355 {
1356         bool initialResize = (height_ == 0);
1357
1358         // Update from work area
1359         width_ = width;
1360         height_ = height;
1361
1362         // Clear the paragraph height cache.
1363         d->par_height_.clear();
1364
1365         updateMetrics();
1366
1367         // view got his initial size, make sure that
1368         // the cursor has a proper position
1369         if (initialResize) {
1370                 updateScrollbar();
1371                 showCursor();
1372         }
1373 }
1374
1375
1376 Inset const * BufferView::getCoveringInset(Text const & text,
1377                 int x, int y) const
1378 {
1379         TextMetrics & tm = d->text_metrics_[&text];
1380         Inset * inset = tm.checkInsetHit(x, y);
1381         if (!inset)
1382                 return 0;
1383
1384         if (!inset->descendable())
1385                 // No need to go further down if the inset is not
1386                 // descendable.
1387                 return inset;
1388
1389         size_t cell_number = inset->nargs();
1390         // Check all the inner cell.
1391         for (size_t i = 0; i != cell_number; ++i) {
1392                 Text const * inner_text = inset->getText(i);
1393                 if (inner_text) {
1394                         // Try deeper.
1395                         Inset const * inset_deeper =
1396                                 getCoveringInset(*inner_text, x, y);
1397                         if (inset_deeper)
1398                                 return inset_deeper;
1399                 }
1400         }
1401
1402         return inset;
1403 }
1404
1405
1406 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
1407 {
1408         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
1409
1410         // This is only called for mouse related events including
1411         // LFUN_FILE_OPEN generated by drag-and-drop.
1412         FuncRequest cmd = cmd0;
1413
1414         Cursor cur(*this);
1415         cur.push(buffer_.inset());
1416         cur.selection() = d->cursor_.selection();
1417
1418         // Either the inset under the cursor or the
1419         // surrounding Text will handle this event.
1420
1421         // make sure we stay within the screen...
1422         cmd.y = min(max(cmd.y, -1), height_);
1423
1424         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1425
1426                 // Get inset under mouse, if there is one.
1427                 Inset const * covering_inset =
1428                         getCoveringInset(buffer_.text(), cmd.x, cmd.y);
1429                 if (covering_inset == d->last_inset_)
1430                         // Same inset, no need to do anything...
1431                         return;
1432
1433                 bool need_redraw = false;
1434                 // const_cast because of setMouseHover().
1435                 Inset * inset = const_cast<Inset *>(covering_inset);
1436                 if (d->last_inset_)
1437                         // Remove the hint on the last hovered inset (if any).
1438                         need_redraw |= d->last_inset_->setMouseHover(false);
1439                 if (inset)
1440                         // Highlighted the newly hovered inset (if any).
1441                         need_redraw |= inset->setMouseHover(true);
1442                 d->last_inset_ = inset;
1443                 if (!need_redraw)
1444                         return;
1445
1446                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
1447                         << cmd.x << ", " << cmd.y << ")");
1448
1449                 d->update_strategy_ = DecorationUpdate;
1450
1451                 // This event (moving without mouse click) is not passed further.
1452                 // This should be changed if it is further utilized.
1453                 buffer_.changed();
1454                 return;
1455         }
1456
1457         // Build temporary cursor.
1458         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x, cmd.y);
1459
1460         // Put anchor at the same position.
1461         cur.resetAnchor();
1462
1463         // Try to dispatch to an non-editable inset near this position
1464         // via the temp cursor. If the inset wishes to change the real
1465         // cursor it has to do so explicitly by using
1466         //  cur.bv().cursor() = cur;  (or similar)
1467         if (inset)
1468                 inset->dispatch(cur, cmd);
1469
1470         // Now dispatch to the temporary cursor. If the real cursor should
1471         // be modified, the inset's dispatch has to do so explicitly.
1472         if (!cur.result().dispatched())
1473                 cur.dispatch(cmd);
1474
1475         //Do we have a selection?
1476         theSelection().haveSelection(cursor().selection());
1477
1478         // If the command has been dispatched,
1479         if (cur.result().dispatched()
1480                 // an update is asked,
1481                 && cur.result().update())
1482                 processUpdateFlags(cur.result().update());
1483 }
1484
1485
1486 void BufferView::lfunScroll(FuncRequest const & cmd)
1487 {
1488         string const scroll_type = cmd.getArg(0);
1489         int const scroll_step =
1490                 (scroll_type == "line")? d->scrollbarParameters_.single_step
1491                 : (scroll_type == "page")? d->scrollbarParameters_.page_step : 0;
1492         if (scroll_step == 0)
1493                 return;
1494         string const scroll_quantity = cmd.getArg(1);
1495         if (scroll_quantity == "up")
1496                 scrollUp(scroll_step);
1497         else if (scroll_quantity == "down")
1498                 scrollDown(scroll_step);
1499         else {
1500                 int const scroll_value = convert<int>(scroll_quantity);
1501                 if (scroll_value)
1502                         scroll(scroll_step * scroll_value);
1503         }
1504 }
1505
1506
1507 void BufferView::scroll(int y)
1508 {
1509         if (y > 0)
1510                 scrollDown(y);
1511         else if (y < 0)
1512                 scrollUp(-y);
1513 }
1514
1515
1516 void BufferView::scrollDown(int offset)
1517 {
1518         Text * text = &buffer_.text();
1519         TextMetrics & tm = d->text_metrics_[text];
1520         int ymax = height_ + offset;
1521         while (true) {
1522                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
1523                 int bottom_pos = last.second->position() + last.second->descent();
1524                 if (last.first + 1 == int(text->paragraphs().size())) {
1525                         if (bottom_pos <= height_)
1526                                 return;
1527                         offset = min(offset, bottom_pos - height_);
1528                         break;
1529                 }
1530                 if (bottom_pos > ymax)
1531                         break;
1532                 tm.newParMetricsDown();
1533         }
1534         d->anchor_ypos_ -= offset;
1535         updateMetrics();
1536         buffer_.changed();
1537 }
1538
1539
1540 void BufferView::scrollUp(int offset)
1541 {
1542         Text * text = &buffer_.text();
1543         TextMetrics & tm = d->text_metrics_[text];
1544         int ymin = - offset;
1545         while (true) {
1546                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
1547                 int top_pos = first.second->position() - first.second->ascent();
1548                 if (first.first == 0) {
1549                         if (top_pos >= 0)
1550                                 return;
1551                         offset = min(offset, - top_pos);
1552                         break;
1553                 }
1554                 if (top_pos < ymin)
1555                         break;
1556                 tm.newParMetricsUp();
1557         }
1558         d->anchor_ypos_ += offset;
1559         updateMetrics();
1560         buffer_.changed();
1561 }
1562
1563
1564 void BufferView::setCursorFromRow(int row)
1565 {
1566         int tmpid = -1;
1567         int tmppos = -1;
1568
1569         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
1570
1571         d->cursor_.reset(buffer_.inset());
1572         if (tmpid == -1)
1573                 buffer_.text().setCursor(d->cursor_, 0, 0);
1574         else
1575                 buffer_.text().setCursor(d->cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
1576 }
1577
1578
1579 void BufferView::gotoLabel(docstring const & label)
1580 {
1581         for (InsetIterator it = inset_iterator_begin(buffer_.inset()); it; ++it) {
1582                 vector<docstring> labels;
1583                 it->getLabelList(buffer_, labels);
1584                 if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
1585                         setCursor(it);
1586                         showCursor();
1587                         return;
1588                 }
1589         }
1590 }
1591
1592
1593 TextMetrics const & BufferView::textMetrics(Text const * t) const
1594 {
1595         return const_cast<BufferView *>(this)->textMetrics(t);
1596 }
1597
1598
1599 TextMetrics & BufferView::textMetrics(Text const * t)
1600 {
1601         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
1602         if (tmc_it == d->text_metrics_.end()) {
1603                 tmc_it = d->text_metrics_.insert(
1604                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
1605         }
1606         return tmc_it->second;
1607 }
1608
1609
1610 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
1611                 pit_type pit) const
1612 {
1613         return textMetrics(t).parMetrics(pit);
1614 }
1615
1616
1617 int BufferView::workHeight() const
1618 {
1619         return height_;
1620 }
1621
1622
1623 void BufferView::setCursor(DocIterator const & dit)
1624 {
1625         size_t const n = dit.depth();
1626         for (size_t i = 0; i < n; ++i)
1627                 dit[i].inset().edit(d->cursor_, true);
1628
1629         d->cursor_.setCursor(dit);
1630         d->cursor_.selection() = false;
1631 }
1632
1633
1634 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
1635 {
1636         // Would be wrong to delete anything if we have a selection.
1637         if (cur.selection())
1638                 return false;
1639
1640         bool need_anchor_change = false;
1641         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1642                 need_anchor_change);
1643
1644         if (need_anchor_change)
1645                 cur.resetAnchor();
1646
1647         if (!changed)
1648                 return false;
1649
1650         d->cursor_ = cur;
1651
1652         updateLabels(buffer_);
1653
1654         updateMetrics();
1655         buffer_.changed();
1656         return true;
1657 }
1658
1659
1660 bool BufferView::mouseSetCursor(Cursor & cur, bool select)
1661 {
1662         BOOST_ASSERT(&cur.bv() == this);
1663
1664         if (!select)
1665                 // this event will clear selection so we save selection for
1666                 // persistent selection
1667                 cap::saveSelection(cursor());
1668
1669         // Has the cursor just left the inset?
1670         bool badcursor = false;
1671         bool leftinset = (&d->cursor_.inset() != &cur.inset());
1672         if (leftinset)
1673                 badcursor = notifyCursorLeaves(d->cursor_, cur);
1674
1675         // FIXME: shift-mouse selection doesn't work well across insets.
1676         bool do_selection = select && &d->cursor_.anchor().inset() == &cur.inset();
1677
1678         // do the dEPM magic if needed
1679         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
1680         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
1681         // the leftinset bool would not be necessary (badcursor instead).
1682         bool update = leftinset;
1683         if (!do_selection && !badcursor && d->cursor_.inTexted())
1684                 update |= checkDepm(cur, d->cursor_);
1685
1686         // if the cursor was in an empty script inset and the new
1687         // position is in the nucleus of the inset, notifyCursorLeaves
1688         // will kill the script inset itself. So we check all the
1689         // elements of the cursor to make sure that they are correct.
1690         // For an example, see bug 2933:
1691         // http://bugzilla.lyx.org/show_bug.cgi?id=2933
1692         // The code below could maybe be moved to a DocIterator method.
1693         //lyxerr << "cur before " << cur << endl;
1694         DocIterator dit = doc_iterator_begin(cur.inset());
1695         dit.bottom() = cur.bottom();
1696         size_t i = 1;
1697         while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
1698                 dit.push_back(cur[i]);
1699                 ++i;
1700         }
1701         //lyxerr << "5 cur after" << dit <<endl;
1702
1703         d->cursor_.setCursor(dit);
1704         d->cursor_.boundary(cur.boundary());
1705         if (do_selection)
1706                 d->cursor_.setSelection();
1707         else
1708                 d->cursor_.clearSelection();
1709
1710         d->cursor_.finishUndo();
1711         d->cursor_.setCurrentFont();
1712         return update;
1713 }
1714
1715
1716 void BufferView::putSelectionAt(DocIterator const & cur,
1717                                 int length, bool backwards)
1718 {
1719         d->cursor_.clearSelection();
1720
1721         setCursor(cur);
1722
1723         if (length) {
1724                 if (backwards) {
1725                         d->cursor_.pos() += length;
1726                         d->cursor_.setSelection(d->cursor_, -length);
1727                 } else
1728                         d->cursor_.setSelection(d->cursor_, length);
1729         }
1730 }
1731
1732
1733 Cursor & BufferView::cursor()
1734 {
1735         return d->cursor_;
1736 }
1737
1738
1739 Cursor const & BufferView::cursor() const
1740 {
1741         return d->cursor_;
1742 }
1743
1744
1745 pit_type BufferView::anchor_ref() const
1746 {
1747         return d->anchor_pit_;
1748 }
1749
1750
1751 bool BufferView::singleParUpdate()
1752 {
1753         Text & buftext = buffer_.text();
1754         pit_type const bottom_pit = d->cursor_.bottom().pit();
1755         TextMetrics & tm = textMetrics(&buftext);
1756         int old_height = tm.parMetrics(bottom_pit).height();
1757
1758         // In Single Paragraph mode, rebreak only
1759         // the (main text, not inset!) paragraph containing the cursor.
1760         // (if this paragraph contains insets etc., rebreaking will
1761         // recursively descend)
1762         tm.redoParagraph(bottom_pit);
1763         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
1764         if (pm.height() != old_height)
1765                 // Paragraph height has changed so we cannot proceed to
1766                 // the singlePar optimisation.
1767                 return false;
1768
1769         d->update_strategy_ = SingleParUpdate;
1770
1771         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
1772                 << " y2: " << pm.position() + pm.descent()
1773                 << " pit: " << bottom_pit
1774                 << " singlepar: 1");
1775         return true;
1776 }
1777
1778
1779 void BufferView::updateMetrics()
1780 {
1781         Text & buftext = buffer_.text();
1782         pit_type const npit = int(buftext.paragraphs().size());
1783
1784         // Clear out the position cache in case of full screen redraw,
1785         d->coord_cache_.clear();
1786
1787         // Clear out paragraph metrics to avoid having invalid metrics
1788         // in the cache from paragraphs not relayouted below
1789         // The complete text metrics will be redone.
1790         d->text_metrics_.clear();
1791
1792         TextMetrics & tm = textMetrics(&buftext);
1793
1794         // Rebreak anchor paragraph.
1795         tm.redoParagraph(d->anchor_pit_);
1796         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
1797
1798         // position anchor
1799         if (d->anchor_pit_ == 0) {
1800                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
1801
1802                 // Complete buffer visible? Then it's easy.
1803                 if (scrollRange == 0)
1804                         d->anchor_ypos_ = anchor_pm.ascent();
1805
1806                 // FIXME: Some clever handling needed to show
1807                 // the _first_ paragraph up to the top if the cursor is
1808                 // in the first line.
1809         }
1810         anchor_pm.setPosition(d->anchor_ypos_);
1811
1812         LYXERR(Debug::PAINTING, "metrics: "
1813                 << " anchor pit = " << d->anchor_pit_
1814                 << " anchor ypos = " << d->anchor_ypos_);
1815
1816         // Redo paragraphs above anchor if necessary.
1817         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
1818         // We are now just above the anchor paragraph.
1819         pit_type pit1 = d->anchor_pit_ - 1;
1820         for (; pit1 >= 0 && y1 >= 0; --pit1) {
1821                 tm.redoParagraph(pit1);
1822                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
1823                 y1 -= pm.descent();
1824                 // Save the paragraph position in the cache.
1825                 pm.setPosition(y1);
1826                 y1 -= pm.ascent();
1827         }
1828
1829         // Redo paragraphs below the anchor if necessary.
1830         int y2 = d->anchor_ypos_ + anchor_pm.descent();
1831         // We are now just below the anchor paragraph.
1832         pit_type pit2 = d->anchor_pit_ + 1;
1833         for (; pit2 < npit && y2 <= height_; ++pit2) {
1834                 tm.redoParagraph(pit2);
1835                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
1836                 y2 += pm.ascent();
1837                 // Save the paragraph position in the cache.
1838                 pm.setPosition(y2);
1839                 y2 += pm.descent();
1840         }
1841
1842         LYXERR(Debug::PAINTING, "Metrics: "
1843                 << " anchor pit = " << d->anchor_pit_
1844                 << " anchor ypos = " << d->anchor_ypos_
1845                 << " y1 = " << y1
1846                 << " y2 = " << y2
1847                 << " pit1 = " << pit1
1848                 << " pit2 = " << pit2);
1849
1850         d->update_strategy_ = FullScreenUpdate;
1851
1852         if (lyxerr.debugging(Debug::WORKAREA)) {
1853                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
1854                 d->coord_cache_.dump();
1855         }
1856 }
1857
1858
1859 void BufferView::insertLyXFile(FileName const & fname)
1860 {
1861         BOOST_ASSERT(d->cursor_.inTexted());
1862
1863         // Get absolute path of file and add ".lyx"
1864         // to the filename if necessary
1865         FileName filename = fileSearch(string(), fname.absFilename(), "lyx");
1866
1867         docstring const disp_fn = makeDisplayPath(filename.absFilename());
1868         // emit message signal.
1869         message(bformat(_("Inserting document %1$s..."), disp_fn));
1870
1871         docstring res;
1872         Buffer buf("", false);
1873         if (buf.loadLyXFile(filename)) {
1874                 ErrorList & el = buffer_.errorList("Parse");
1875                 // Copy the inserted document error list into the current buffer one.
1876                 el = buf.errorList("Parse");
1877                 buffer_.undo().recordUndo(d->cursor_);
1878                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
1879                                              buf.params().getTextClassPtr(), el);
1880                 res = _("Document %1$s inserted.");
1881         } else {
1882                 res = _("Could not insert document %1$s");
1883         }
1884
1885         updateMetrics();
1886         buffer_.changed();
1887         // emit message signal.
1888         message(bformat(res, disp_fn));
1889         buffer_.errors("Parse");
1890 }
1891
1892
1893 Point BufferView::coordOffset(DocIterator const & dit, bool boundary) const
1894 {
1895         int x = 0;
1896         int y = 0;
1897         int lastw = 0;
1898
1899         // Addup contribution of nested insets, from inside to outside,
1900         // keeping the outer paragraph for a special handling below
1901         for (size_t i = dit.depth() - 1; i >= 1; --i) {
1902                 CursorSlice const & sl = dit[i];
1903                 int xx = 0;
1904                 int yy = 0;
1905
1906                 // get relative position inside sl.inset()
1907                 sl.inset().cursorPos(*this, sl, boundary && (i + 1 == dit.depth()), xx, yy);
1908
1909                 // Make relative position inside of the edited inset relative to sl.inset()
1910                 x += xx;
1911                 y += yy;
1912
1913                 // In case of an RTL inset, the edited inset will be positioned to the left
1914                 // of xx:yy
1915                 if (sl.text()) {
1916                         bool boundary_i = boundary && i + 1 == dit.depth();
1917                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
1918                         if (rtl)
1919                                 x -= lastw;
1920                 }
1921
1922                 // remember width for the case that sl.inset() is positioned in an RTL inset
1923                 if (i && dit[i - 1].text()) {
1924                         // If this Inset is inside a Text Inset, retrieve the Dimension
1925                         // from the containing text instead of using Inset::dimension() which
1926                         // might not be implemented.
1927                         // FIXME (Abdel 23/09/2007): this is a bit messy because of the
1928                         // elimination of Inset::dim_ cache. This coordOffset() method needs
1929                         // to be rewritten in light of the new design.
1930                         Dimension const & dim = parMetrics(dit[i - 1].text(),
1931                                 dit[i - 1].pit()).insetDimension(&sl.inset());
1932                         lastw = dim.wid;
1933                 } else {
1934                         Dimension const dim = sl.inset().dimension(*this);
1935                         lastw = dim.wid;
1936                 }
1937
1938                 //lyxerr << "Cursor::getPos, i: "
1939                 // << i << " x: " << xx << " y: " << y << endl;
1940         }
1941
1942         // Add contribution of initial rows of outermost paragraph
1943         CursorSlice const & sl = dit[0];
1944         TextMetrics const & tm = textMetrics(sl.text());
1945         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
1946         BOOST_ASSERT(!pm.rows().empty());
1947         y -= pm.rows()[0].ascent();
1948 #if 1
1949         // FIXME: document this mess
1950         size_t rend;
1951         if (sl.pos() > 0 && dit.depth() == 1) {
1952                 int pos = sl.pos();
1953                 if (pos && boundary)
1954                         --pos;
1955 //              lyxerr << "coordOffset: boundary:" << boundary << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
1956                 rend = pm.pos2row(pos);
1957         } else
1958                 rend = pm.pos2row(sl.pos());
1959 #else
1960         size_t rend = pm.pos2row(sl.pos());
1961 #endif
1962         for (size_t rit = 0; rit != rend; ++rit)
1963                 y += pm.rows()[rit].height();
1964         y += pm.rows()[rend].ascent();
1965
1966         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
1967
1968         // Make relative position from the nested inset now bufferview absolute.
1969         int xx = bottom_tm.cursorX(dit.bottom(), boundary && dit.depth() == 1);
1970         x += xx;
1971
1972         // In the RTL case place the nested inset at the left of the cursor in
1973         // the outer paragraph
1974         bool boundary_1 = boundary && 1 == dit.depth();
1975         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
1976         if (rtl)
1977                 x -= lastw;
1978
1979         return Point(x, y);
1980 }
1981
1982
1983 Point BufferView::getPos(DocIterator const & dit, bool boundary) const
1984 {
1985         CursorSlice const & bot = dit.bottom();
1986         TextMetrics const & tm = textMetrics(bot.text());
1987         if (!tm.has(bot.pit()))
1988                 return Point(-1, -1);
1989
1990         Point p = coordOffset(dit, boundary); // offset from outer paragraph
1991         p.y_ += tm.parMetrics(bot.pit()).position();
1992         return p;
1993 }
1994
1995
1996 void BufferView::draw(frontend::Painter & pain)
1997 {
1998         LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
1999         Text & text = buffer_.text();
2000         TextMetrics const & tm = d->text_metrics_[&text];
2001         int const y = tm.first().second->position();
2002         PainterInfo pi(this, pain);
2003
2004         switch (d->update_strategy_) {
2005
2006         case NoScreenUpdate:
2007                 // If no screen painting is actually needed, only some the different
2008                 // coordinates of insets and paragraphs needs to be updated.
2009                 pi.full_repaint = true;
2010                 pi.pain.setDrawingEnabled(false);
2011                 tm.draw(pi, 0, y);
2012                 break;
2013
2014         case SingleParUpdate:
2015                 pi.full_repaint = false;
2016                 // In general, only the current row of the outermost paragraph
2017                 // will be redrawn. Particular cases where selection spans
2018                 // multiple paragraph are correctly detected in TextMetrics.
2019                 tm.draw(pi, 0, y);
2020                 break;
2021
2022         case DecorationUpdate:
2023                 // FIXME: We should also distinguish DecorationUpdate to avoid text
2024                 // drawing if possible. This is not possible to do easily right now
2025                 // because of the single backing pixmap.
2026
2027         case FullScreenUpdate:
2028                 // The whole screen, including insets, will be refreshed.
2029                 pi.full_repaint = true;
2030
2031                 // Clear background.
2032                 pain.fillRectangle(0, 0, width_, height_,
2033                         buffer_.inset().backgroundColor());
2034
2035                 // Draw everything.
2036                 tm.draw(pi, 0, y);
2037
2038                 // and possibly grey out below
2039                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2040                 int const y2 = lastpm.second->position() + lastpm.second->descent();
2041                 if (y2 < height_)
2042                         pain.fillRectangle(0, y2, width_, height_ - y2, Color_bottomarea);
2043                 break;
2044         }
2045         LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
2046
2047         // The scrollbar needs an update.
2048         updateScrollbar();
2049
2050         // Normalize anchor for next time
2051         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
2052         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2053         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
2054                 ParagraphMetrics const & pm = tm.parMetrics(pit);
2055                 if (pm.position() + pm.descent() > 0) {
2056                         d->anchor_pit_ = pit;
2057                         d->anchor_ypos_ = pm.position();
2058                         break;
2059                 }
2060         }
2061         LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
2062                 << "  anchor ypos = " << d->anchor_ypos_);
2063 }
2064
2065
2066 void BufferView::message(docstring const & msg)
2067 {
2068         if (d->gui_)
2069                 d->gui_->message(msg);
2070 }
2071
2072
2073 void BufferView::showDialog(string const & name)
2074 {
2075         if (d->gui_)
2076                 d->gui_->showDialog(name, string());
2077 }
2078
2079
2080 void BufferView::showDialog(string const & name,
2081         string const & data, Inset * inset)
2082 {
2083         if (d->gui_)
2084                 d->gui_->showDialog(name, data, inset);
2085 }
2086
2087
2088 void BufferView::updateDialog(string const & name, string const & data)
2089 {
2090         if (d->gui_)
2091                 d->gui_->updateDialog(name, data);
2092 }
2093
2094
2095 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
2096 {
2097         d->gui_ = gui;
2098 }
2099
2100
2101 // FIXME: Move this out of BufferView again
2102 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
2103 {
2104         if (!fname.isReadableFile()) {
2105                 docstring const error = from_ascii(strerror(errno));
2106                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2107                 docstring const text =
2108                   bformat(_("Could not read the specified document\n"
2109                             "%1$s\ndue to the error: %2$s"), file, error);
2110                 Alert::error(_("Could not read file"), text);
2111                 return docstring();
2112         }
2113
2114         if (!fname.isReadableFile()) {
2115                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2116                 docstring const text =
2117                   bformat(_("%1$s\n is not readable."), file);
2118                 Alert::error(_("Could not open file"), text);
2119                 return docstring();
2120         }
2121
2122         // FIXME UNICODE: We don't know the encoding of the file
2123         docstring file_content = fname.fileContents("UTF-8");
2124         if (file_content.empty()) {
2125                 Alert::error(_("Reading not UTF-8 encoded file"),
2126                              _("The file is not UTF-8 encoded.\n"
2127                                "It will be read as local 8Bit-encoded.\n"
2128                                "If this does not give the correct result\n"
2129                                "then please change the encoding of the file\n"
2130                                "to UTF-8 with a program other than LyX.\n"));
2131                 file_content = fname.fileContents("local8bit");
2132         }
2133
2134         return normalize_c(file_content);
2135 }
2136
2137
2138 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
2139 {
2140         docstring const tmpstr = contentsOfPlaintextFile(f);
2141
2142         if (tmpstr.empty())
2143                 return;
2144
2145         Cursor & cur = cursor();
2146         cap::replaceSelection(cur);
2147         buffer_.undo().recordUndo(cur);
2148         if (asParagraph)
2149                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr);
2150         else
2151                 cur.innerText()->insertStringAsLines(cur, tmpstr);
2152
2153         updateMetrics();
2154         buffer_.changed();
2155 }
2156
2157 } // namespace lyx