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 "ErrorList.h"
  28 #include "factory.h"
  29 #include "FloatList.h"
  30 #include "FuncRequest.h"
  31 #include "FuncStatus.h"
  32 #include "Intl.h"
  33 #include "InsetIterator.h"
  34 #include "Language.h"
  35 #include "LaTeXFeatures.h"
  36 #include "LyX.h"
  37 #include "lyxfind.h"
  38 #include "LyXFunc.h"
  39 #include "Layout.h"
  40 #include "LyXRC.h"
  41 #include "MetricsInfo.h"
  42 #include "Paragraph.h"
  43 #include "paragraph_funcs.h"
  44 #include "ParagraphParameters.h"
  45 #include "ParIterator.h"
  46 #include "Session.h"
  47 #include "Text.h"
  48 #include "TextClass.h"
  49 #include "TextMetrics.h"
  50 #include "TexRow.h"
  51 #include "TocBackend.h"
  52 #include "VSpace.h"
  53 #include "WordLangTuple.h"
  54
  55 #include "insets/InsetBibtex.h"
  56 #include "insets/InsetCommand.h" // ChangeRefs
  57 #include "insets/InsetExternal.h"
  58 #include "insets/InsetGraphics.h"
  59 #include "insets/InsetRef.h"
  60 #include "insets/InsetText.h"
  61
  62 #include "frontends/alert.h"
  63 #include "frontends/Application.h"
  64 #include "frontends/Delegates.h"
  65 #include "frontends/FontMetrics.h"
  66 #include "frontends/Painter.h"
  67 #include "frontends/Selection.h"
  68
  69 #include "graphics/Previews.h"
  70
  71 #include "support/convert.h"
  72 #include "support/debug.h"
  73 #include "support/ExceptionMessage.h"
  74 #include "support/filetools.h"
  75 #include "support/gettext.h"
  76 #include "support/lstrings.h"
  77 #include "support/Package.h"
  78 #include "support/types.h"
  79
  80 #include <cerrno>
  81 #include <fstream>
  82 #include <functional>
  83 #include <iterator>
  84 #include <vector>
  85
  86 using namespace std;
  87 using namespace lyx::support;
  88
  89 namespace lyx {
  90
  91 namespace Alert = frontend::Alert;
  92
  93 namespace {
  94
  95 /// Return an inset of this class if it exists at the current cursor position
  96 template <class T>
  97 T * getInsetByCode(Cursor const & cur, InsetCode code)
  98 {
  99         DocIterator it = cur;
 100         Inset * inset = it.nextInset();
 101         if (inset && inset->lyxCode() == code)
 102                 return static_cast<T*>(inset);
 103         return 0;
 104 }
 105
 106
 107 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 108         bool same_content);
 109
 110 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 111         docstring const & contents)
 112 {
 113         DocIterator tmpdit = dit;
 114
 115         while (tmpdit) {
 116                 Inset const * inset = tmpdit.nextInset();
 117                 if (inset
 118                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()
 119                     && (contents.empty() ||
 120                     static_cast<InsetCommand const *>(inset)->getFirstNonOptParam() == contents)) {
 121                         dit = tmpdit;
 122                         return true;
 123                 }
 124                 tmpdit.forwardInset();
 125         }
 126
 127         return false;
 128 }
 129
 130
 131 /// Looks for next inset with one of the given codes.
 132 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 133         bool same_content)
 134 {
 135         docstring contents;
 136         DocIterator tmpdit = dit;
 137         tmpdit.forwardInset();
 138         if (!tmpdit)
 139                 return false;
 140
 141         if (same_content) {
 142                 Inset const * inset = tmpdit.nextInset();
 143                 if (inset
 144                     && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()) {
 145                         contents = static_cast<InsetCommand const *>(inset)->getFirstNonOptParam();
 146                 }
 147         }
 148
 149         if (!findNextInset(tmpdit, codes, contents)) {
 150                 if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
 151                         tmpdit  = doc_iterator_begin(tmpdit.bottom().inset());
 152                         if (!findNextInset(tmpdit, codes, contents))
 153                                 return false;
 154                 } else
 155                         return false;
 156         }
 157
 158         dit = tmpdit;
 159         return true;
 160 }
 161
 162
 163 /// Looks for next inset with the given code
 164 void findInset(DocIterator & dit, InsetCode code, bool same_content)
 165 {
 166         findInset(dit, vector<InsetCode>(1, code), same_content);
 167 }
 168
 169
 170 /// Moves cursor to the next inset with one of the given codes.
 171 void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
 172                bool same_content)
 173 {
 174         Cursor tmpcur = bv->cursor();
 175         if (!findInset(tmpcur, codes, same_content)) {
 176                 bv->cursor().message(_("No more insets"));
 177                 return;
 178         }
 179
 180         tmpcur.clearSelection();
 181         bv->setCursor(tmpcur);
 182         bv->showCursor();
 183 }
 184
 185
 186 /// Moves cursor to the next inset with given code.
 187 void gotoInset(BufferView * bv, InsetCode code, bool same_content)
 188 {
 189         gotoInset(bv, vector<InsetCode>(1, code), same_content);
 190 }
 191
 192
 193 /// A map from a Text to the associated text metrics
 194 typedef map<Text const *, TextMetrics> TextMetricsCache;
 195
 196 enum ScreenUpdateStrategy {
 197         NoScreenUpdate,
 198         SingleParUpdate,
 199         FullScreenUpdate,
 200         DecorationUpdate
 201 };
 202
 203 } // anon namespace
 204
 205
 206 /////////////////////////////////////////////////////////////////////
 207 //
 208 // BufferView
 209 //
 210 /////////////////////////////////////////////////////////////////////
 211
 212 struct BufferView::Private
 213 {
 214         Private(BufferView & bv): wh_(0), cursor_(bv),
 215                 anchor_pit_(0), anchor_ypos_(0),
 216                 inlineCompletionUniqueChars_(0),
 217                 last_inset_(0), gui_(0)
 218         {}
 219
 220         ///
 221         ScrollbarParameters scrollbarParameters_;
 222         ///
 223         ScreenUpdateStrategy update_strategy_;
 224         ///
 225         CoordCache coord_cache_;
 226
 227         /// Estimated average par height for scrollbar.
 228         int wh_;
 229         /// this is used to handle XSelection events in the right manner.
 230         struct {
 231                 CursorSlice cursor;
 232                 CursorSlice anchor;
 233                 bool set;
 234         } xsel_cache_;
 235         ///
 236         Cursor cursor_;
 237         ///
 238         pit_type anchor_pit_;
 239         ///
 240         int anchor_ypos_;
 241         ///
 242         vector<int> par_height_;
 243
 244         ///
 245         DocIterator inlineCompletionPos_;
 246         ///
 247         docstring inlineCompletion_;
 248         ///
 249         size_t inlineCompletionUniqueChars_;
 250
 251         /// keyboard mapping object.
 252         Intl intl_;
 253
 254         /// last visited inset.
 255         /** kept to send setMouseHover(false).
 256           * Not owned, so don't delete.
 257           */
 258         Inset * last_inset_;
 259
 260         mutable TextMetricsCache text_metrics_;
 261
 262         /// Whom to notify.
 263         /** Not owned, so don't delete.
 264           */
 265         frontend::GuiBufferViewDelegate * gui_;
 266
 267         /// Cache for Find Next
 268         FuncRequest search_request_cache_;
 269 };
 270
 271
 272 BufferView::BufferView(Buffer & buf)
 273         : width_(0), height_(0), full_screen_(false), buffer_(buf), d(new Private(*this))
 274 {
 275         d->xsel_cache_.set = false;
 276         d->intl_.initKeyMapper(lyxrc.use_kbmap);
 277
 278         d->cursor_.push(buffer_.inset());
 279         d->cursor_.resetAnchor();
 280         d->cursor_.setCurrentFont();
 281
 282         if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
 283                 graphics::Previews::get().generateBufferPreviews(buffer_);
 284 }
 285
 286
 287 BufferView::~BufferView()
 288 {
 289         // current buffer is going to be switched-off, save cursor pos
 290         // Ideally, the whole cursor stack should be saved, but session
 291         // currently can only handle bottom (whole document) level pit and pos.
 292         // That is to say, if a cursor is in a nested inset, it will be
 293         // restore to the left of the top level inset.
 294         LastFilePosSection::FilePos fp;
 295         fp.pit = d->cursor_.bottom().pit();
 296         fp.pos = d->cursor_.bottom().pos();
 297         LyX::ref().session().lastFilePos().save(buffer_.fileName(), fp);
 298
 299         delete d;
 300 }
 301
 302
 303 int BufferView::rightMargin() const
 304 {
 305         // The additional test for the case the outliner is opened.
 306         if (!full_screen_ ||
 307                 !lyxrc.full_screen_limit ||
 308                 width_ < lyxrc.full_screen_width + 20)
 309                         return 10;
 310
 311         return (width_ - lyxrc.full_screen_width) / 2;
 312 }
 313
 314
 315 int BufferView::leftMargin() const
 316 {
 317         return rightMargin();
 318 }
 319
 320
 321 bool BufferView::isTopScreen() const
 322 {
 323         return d->scrollbarParameters_.position == d->scrollbarParameters_.min;
 324 }
 325
 326
 327 bool BufferView::isBottomScreen() const
 328 {
 329         return d->scrollbarParameters_.position == d->scrollbarParameters_.max;
 330 }
 331
 332
 333 Intl & BufferView::getIntl()
 334 {
 335         return d->intl_;
 336 }
 337
 338
 339 Intl const & BufferView::getIntl() const
 340 {
 341         return d->intl_;
 342 }
 343
 344
 345 CoordCache & BufferView::coordCache()
 346 {
 347         return d->coord_cache_;
 348 }
 349
 350
 351 CoordCache const & BufferView::coordCache() const
 352 {
 353         return d->coord_cache_;
 354 }
 355
 356
 357 Buffer & BufferView::buffer()
 358 {
 359         return buffer_;
 360 }
 361
 362
 363 Buffer const & BufferView::buffer() const
 364 {
 365         return buffer_;
 366 }
 367
 368
 369 bool BufferView::fitCursor()
 370 {
 371         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
 372                 frontend::FontMetrics const & fm =
 373                         theFontMetrics(d->cursor_.getFont().fontInfo());
 374                 int const asc = fm.maxAscent();
 375                 int const des = fm.maxDescent();
 376                 Point const p = getPos(d->cursor_, d->cursor_.boundary());
 377                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 378                         return false;
 379         }
 380         return true;
 381 }
 382
 383
 384 void BufferView::processUpdateFlags(Update::flags flags)
 385 {
 386         // last_inset_ points to the last visited inset. This pointer may become
 387         // invalid because of keyboard editing. Since all such operations
 388         // causes screen update(), I reset last_inset_ to avoid such a problem.
 389         d->last_inset_ = 0;
 390         // This is close to a hot-path.
 391         LYXERR(Debug::DEBUG, "BufferView::processUpdateFlags()"
 392                 << "[fitcursor = " << (flags & Update::FitCursor)
 393                 << ", forceupdate = " << (flags & Update::Force)
 394                 << ", singlepar = " << (flags & Update::SinglePar)
 395                 << "]  buffer: " << &buffer_);
 396
 397         buffer_.updateMacros();
 398
 399         // Now do the first drawing step if needed. This consists on updating
 400         // the CoordCache in updateMetrics().
 401         // The second drawing step is done in WorkArea::redraw() if needed.
 402
 403         // Case when no explicit update is requested.
 404         if (!flags) {
 405                 // no need to redraw anything.
 406                 d->update_strategy_ = NoScreenUpdate;
 407                 return;
 408         }
 409
 410         if (flags == Update::Decoration) {
 411                 d->update_strategy_ = DecorationUpdate;
 412                 buffer_.changed();
 413                 return;
 414         }
 415
 416         if (flags == Update::FitCursor
 417                 || flags == (Update::Decoration | Update::FitCursor)) {
 418                 // tell the frontend to update the screen if needed.
 419                 if (fitCursor()) {
 420                         showCursor();
 421                         return;
 422                 }
 423                 if (flags & Update::Decoration) {
 424                         d->update_strategy_ = DecorationUpdate;
 425                         buffer_.changed();
 426                         return;
 427                 }
 428                 // no screen update is needed.
 429                 d->update_strategy_ = NoScreenUpdate;
 430                 return;
 431         }
 432
 433         bool const full_metrics = flags & Update::Force || !singleParUpdate();
 434
 435         if (full_metrics)
 436                 // We have to update the full screen metrics.
 437                 updateMetrics();
 438
 439         if (!(flags & Update::FitCursor)) {
 440                 // Nothing to do anymore. Trigger a redraw and return
 441                 buffer_.changed();
 442                 return;
 443         }
 444
 445         // updateMetrics() does not update paragraph position
 446         // This is done at draw() time. So we need a redraw!
 447         buffer_.changed();
 448
 449         if (fitCursor()) {
 450                 // The cursor is off screen so ensure it is visible.
 451                 // refresh it:
 452                 showCursor();
 453         }
 454 }
 455
 456
 457 void BufferView::updateScrollbar()
 458 {
 459         if (height_ == 0)
 460                 return;
 461
 462         // We prefer fixed size line scrolling.
 463         d->scrollbarParameters_.single_step = defaultRowHeight();
 464         // We prefer full screen page scrolling.
 465         d->scrollbarParameters_.page_step = height_;
 466
 467         Text & t = buffer_.text();
 468         TextMetrics & tm = d->text_metrics_[&t];
 469
 470         LYXERR(Debug::GUI, " Updating scrollbar: height: "
 471                 << t.paragraphs().size()
 472                 << " curr par: " << d->cursor_.bottom().pit()
 473                 << " default height " << defaultRowHeight());
 474
 475         size_t const parsize = t.paragraphs().size();
 476         if (d->par_height_.size() != parsize) {
 477                 d->par_height_.clear();
 478                 // FIXME: We assume a default paragraph height of 2 rows. This
 479                 // should probably be pondered with the screen width.
 480                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
 481         }
 482
 483         // Look at paragraph heights on-screen
 484         pair<pit_type, ParagraphMetrics const *> first = tm.first();
 485         pair<pit_type, ParagraphMetrics const *> last = tm.last();
 486         for (pit_type pit = first.first; pit <= last.first; ++pit) {
 487                 d->par_height_[pit] = tm.parMetrics(pit).height();
 488                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
 489                         << d->par_height_[pit]);
 490         }
 491
 492         int top_pos = first.second->position() - first.second->ascent();
 493         int bottom_pos = last.second->position() + last.second->descent();
 494         bool first_visible = first.first == 0 && top_pos >= 0;
 495         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
 496         if (first_visible && last_visible) {
 497                 d->scrollbarParameters_.min = 0;
 498                 d->scrollbarParameters_.max = 0;
 499                 return;
 500         }
 501
 502         d->scrollbarParameters_.min = top_pos;
 503         for (size_t i = 0; i != size_t(first.first); ++i)
 504                 d->scrollbarParameters_.min -= d->par_height_[i];
 505         d->scrollbarParameters_.max = bottom_pos;
 506         for (size_t i = last.first + 1; i != parsize; ++i)
 507                 d->scrollbarParameters_.max += d->par_height_[i];
 508
 509         d->scrollbarParameters_.position = 0;
 510         // The reference is the top position so we remove one page.
 511         d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 512 }
 513
 514
 515 ScrollbarParameters const & BufferView::scrollbarParameters() const
 516 {
 517         return d->scrollbarParameters_;
 518 }
 519
 520
 521 docstring BufferView::toolTip(int x, int y) const
 522 {
 523         // Get inset under mouse, if there is one.
 524         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 525         if (!covering_inset)
 526                 // No inset, no tooltip...
 527                 return docstring();
 528         return covering_inset->toolTip(*this, x, y);
 529 }
 530
 531
 532 docstring BufferView::contextMenu(int x, int y) const
 533 {
 534         // Get inset under mouse, if there is one.
 535         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 536         if (covering_inset)
 537                 return covering_inset->contextMenu(*this, x, y);
 538
 539         return buffer_.inset().contextMenu(*this, x, y);
 540 }
 541
 542
 543 void BufferView::scrollDocView(int value)
 544 {
 545         int const offset = value - d->scrollbarParameters_.position;
 546         // If the offset is less than 2 screen height, prefer to scroll instead.
 547         if (abs(offset) <= 2 * height_) {
 548                 scroll(offset);
 549                 return;
 550         }
 551
 552         // cut off at the top
 553         if (value <= d->scrollbarParameters_.min) {
 554                 DocIterator dit = doc_iterator_begin(buffer_.inset());
 555                 showCursor(dit);
 556                 LYXERR(Debug::SCROLLING, "scroll to top");
 557                 return;
 558         }
 559
 560         // cut off at the bottom
 561         if (value >= d->scrollbarParameters_.max) {
 562                 DocIterator dit = doc_iterator_end(buffer_.inset());
 563                 dit.backwardPos();
 564                 showCursor(dit);
 565                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 566                 return;
 567         }
 568
 569         // find paragraph at target position
 570         int par_pos = d->scrollbarParameters_.min;
 571         pit_type i = 0;
 572         for (; i != int(d->par_height_.size()); ++i) {
 573                 par_pos += d->par_height_[i];
 574                 if (par_pos >= value)
 575                         break;
 576         }
 577
 578         if (par_pos < value) {
 579                 // It seems we didn't find the correct pit so stay on the safe side and
 580                 // scroll to bottom.
 581                 LYXERR0("scrolling position not found!");
 582                 scrollDocView(d->scrollbarParameters_.max);
 583                 return;
 584         }
 585
 586         DocIterator dit = doc_iterator_begin(buffer_.inset());
 587         dit.pit() = i;
 588         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 589         showCursor(dit);
 590 }
 591
 592
 593 // FIXME: this method is not working well.
 594 void BufferView::setCursorFromScrollbar()
 595 {
 596         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 597
 598         int const height = 2 * defaultRowHeight();
 599         int const first = height;
 600         int const last = height_ - height;
 601         Cursor & cur = d->cursor_;
 602
 603         switch (cursorStatus(cur)) {
 604         case CUR_ABOVE:
 605                 // We reset the cursor because cursorStatus() does not
 606                 // work when the cursor is within mathed.
 607                 cur.reset(buffer_.inset());
 608                 tm.setCursorFromCoordinates(cur, 0, first);
 609                 cur.clearSelection();
 610                 break;
 611         case CUR_BELOW:
 612                 // We reset the cursor because cursorStatus() does not
 613                 // work when the cursor is within mathed.
 614                 cur.reset(buffer_.inset());
 615                 tm.setCursorFromCoordinates(cur, 0, last);
 616                 cur.clearSelection();
 617                 break;
 618         case CUR_INSIDE:
 619                 int const y = getPos(cur, cur.boundary()).y_;
 620                 int const newy = min(last, max(y, first));
 621                 if (y != newy) {
 622                         cur.reset(buffer_.inset());
 623                         tm.setCursorFromCoordinates(cur, 0, newy);
 624                 }
 625         }
 626 }
 627
 628
 629 Change const BufferView::getCurrentChange() const
 630 {
 631         if (!d->cursor_.selection())
 632                 return Change(Change::UNCHANGED);
 633
 634         DocIterator dit = d->cursor_.selectionBegin();
 635         return dit.paragraph().lookupChange(dit.pos());
 636 }
 637
 638
 639 // this could be used elsewhere as well?
 640 // FIXME: This does not work within mathed!
 641 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 642 {
 643         Point const p = getPos(dit, dit.boundary());
 644         if (p.y_ < 0)
 645                 return CUR_ABOVE;
 646         if (p.y_ > workHeight())
 647                 return CUR_BELOW;
 648         return CUR_INSIDE;
 649 }
 650
 651
 652 void BufferView::saveBookmark(unsigned int idx)
 653 {
 654         // tenatively save bookmark, id and pos will be used to
 655         // acturately locate a bookmark in a 'live' lyx session.
 656         // pit and pos will be updated with bottom level pit/pos
 657         // when lyx exits.
 658         LyX::ref().session().bookmarks().save(
 659                 buffer_.fileName(),
 660                 d->cursor_.bottom().pit(),
 661                 d->cursor_.bottom().pos(),
 662                 d->cursor_.paragraph().id(),
 663                 d->cursor_.pos(),
 664                 idx
 665         );
 666         if (idx)
 667                 // emit message signal.
 668                 message(_("Save bookmark"));
 669 }
 670
 671
 672 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 673         int top_id, pos_type top_pos)
 674 {
 675         bool success = false;
 676         DocIterator dit;
 677
 678         d->cursor_.clearSelection();
 679
 680         // if a valid par_id is given, try it first
 681         // This is the case for a 'live' bookmark when unique paragraph ID
 682         // is used to track bookmarks.
 683         if (top_id > 0) {
 684                 dit = buffer_.getParFromID(top_id);
 685                 if (!dit.atEnd()) {
 686                         dit.pos() = min(dit.paragraph().size(), top_pos);
 687                         // Some slices of the iterator may not be
 688                         // reachable (e.g. closed collapsable inset)
 689                         // so the dociterator may need to be
 690                         // shortened. Otherwise, setCursor may crash
 691                         // lyx when the cursor can not be set to these
 692                         // insets.
 693                         size_t const n = dit.depth();
 694                         for (size_t i = 0; i < n; ++i)
 695                                 if (dit[i].inset().editable() != Inset::HIGHLY_EDITABLE) {
 696                                         dit.resize(i);
 697                                         break;
 698                                 }
 699                         success = true;
 700                 }
 701         }
 702
 703         // if top_id == 0, or searching through top_id failed
 704         // This is the case for a 'restored' bookmark when only bottom
 705         // (document level) pit was saved. Because of this, bookmark
 706         // restoration is inaccurate. If a bookmark was within an inset,
 707         // it will be restored to the left of the outmost inset that contains
 708         // the bookmark.
 709         if (bottom_pit < int(buffer_.paragraphs().size())) {
 710                 dit = doc_iterator_begin(buffer_.inset());
 711
 712                 dit.pit() = bottom_pit;
 713                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 714                 success = true;
 715         }
 716
 717         if (success) {
 718                 // Note: only bottom (document) level pit is set.
 719                 setCursor(dit);
 720                 // set the current font.
 721                 d->cursor_.setCurrentFont();
 722                 // To center the screen on this new position we need the
 723                 // paragraph position which is computed at draw() time.
 724                 // So we need a redraw!
 725                 buffer_.changed();
 726                 if (fitCursor())
 727                         showCursor();
 728         }
 729
 730         return success;
 731 }
 732
 733
 734 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 735 {
 736         if (lyxrc.rtl_support) {
 737                 if (d->cursor_.real_current_font.isRightToLeft()) {
 738                         if (d->intl_.keymap == Intl::PRIMARY)
 739                                 d->intl_.keyMapSec();
 740                 } else {
 741                         if (d->intl_.keymap == Intl::SECONDARY)
 742                                 d->intl_.keyMapPrim();
 743                 }
 744         }
 745
 746         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 747 }
 748
 749
 750 int BufferView::workWidth() const
 751 {
 752         return width_;
 753 }
 754
 755
 756 void BufferView::showCursor()
 757 {
 758         showCursor(d->cursor_);
 759 }
 760
 761
 762 void BufferView::showCursor(DocIterator const & dit)
 763 {
 764         // We are not properly started yet, delay until resizing is
 765         // done.
 766         if (height_ == 0)
 767                 return;
 768
 769         LYXERR(Debug::SCROLLING, "recentering!");
 770
 771         CursorSlice const & bot = dit.bottom();
 772         TextMetrics & tm = d->text_metrics_[bot.text()];
 773
 774         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 775         int bot_pit = bot.pit();
 776         if (bot_pit > max_pit) {
 777                 // FIXME: Why does this happen?
 778                 LYXERR0("bottom pit is greater that max pit: "
 779                         << bot_pit << " > " << max_pit);
 780                 bot_pit = max_pit;
 781         }
 782
 783         if (bot_pit == tm.first().first - 1)
 784                 tm.newParMetricsUp();
 785         else if (bot_pit == tm.last().first + 1)
 786                 tm.newParMetricsDown();
 787
 788         if (tm.contains(bot_pit)) {
 789                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 790                 LASSERT(!pm.rows().empty(), /**/);
 791                 // FIXME: smooth scrolling doesn't work in mathed.
 792                 CursorSlice const & cs = dit.innerTextSlice();
 793                 int offset = coordOffset(dit, dit.boundary()).y_;
 794                 int ypos = pm.position() + offset;
 795                 Dimension const & row_dim =
 796                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 797                 if (ypos - row_dim.ascent() < 0)
 798                         scrollUp(- ypos + row_dim.ascent());
 799                 else if (ypos + row_dim.descent() > height_)
 800                         scrollDown(ypos - height_ + row_dim.descent());
 801                 // else, nothing to do, the cursor is already visible so we just return.
 802                 return;
 803         }
 804
 805         // fix inline completion position
 806         if (d->inlineCompletionPos_.fixIfBroken())
 807                 d->inlineCompletionPos_ = DocIterator();
 808
 809         tm.redoParagraph(bot_pit);
 810         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 811         int offset = coordOffset(dit, dit.boundary()).y_;
 812
 813         d->anchor_pit_ = bot_pit;
 814         CursorSlice const & cs = dit.innerTextSlice();
 815         Dimension const & row_dim =
 816                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 817
 818         if (d->anchor_pit_ == 0)
 819                 d->anchor_ypos_ = offset + pm.ascent();
 820         else if (d->anchor_pit_ == max_pit)
 821                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
 822         else
 823                 d->anchor_ypos_ = defaultRowHeight() * 2 - offset - row_dim.descent();
 824
 825         updateMetrics();
 826         buffer_.changed();
 827 }
 828
 829
 830 FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 831 {
 832         FuncStatus flag;
 833
 834         Cursor & cur = d->cursor_;
 835
 836         switch (cmd.action) {
 837
 838         case LFUN_UNDO:
 839                 flag.enabled(buffer_.undo().hasUndoStack());
 840                 break;
 841         case LFUN_REDO:
 842                 flag.enabled(buffer_.undo().hasRedoStack());
 843                 break;
 844         case LFUN_FILE_INSERT:
 845         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
 846         case LFUN_FILE_INSERT_PLAINTEXT:
 847         case LFUN_BOOKMARK_SAVE:
 848                 // FIXME: Actually, these LFUNS should be moved to Text
 849                 flag.enabled(cur.inTexted());
 850                 break;
 851         case LFUN_FONT_STATE:
 852         case LFUN_LABEL_INSERT:
 853         case LFUN_INFO_INSERT:
 854         case LFUN_INSET_EDIT:
 855         case LFUN_PARAGRAPH_GOTO:
 856         case LFUN_NOTE_NEXT:
 857         case LFUN_REFERENCE_NEXT:
 858         case LFUN_WORD_FIND:
 859         case LFUN_WORD_REPLACE:
 860         case LFUN_MARK_OFF:
 861         case LFUN_MARK_ON:
 862         case LFUN_MARK_TOGGLE:
 863         case LFUN_SCREEN_RECENTER:
 864         case LFUN_BIBTEX_DATABASE_ADD:
 865         case LFUN_BIBTEX_DATABASE_DEL:
 866         case LFUN_STATISTICS:
 867                 flag.enabled(true);
 868                 break;
 869
 870         case LFUN_NEXT_INSET_TOGGLE:
 871         case LFUN_NEXT_INSET_MODIFY: {
 872                 // this is the real function we want to invoke
 873                 FuncCode const code =
 874                         (cmd.action == LFUN_NEXT_INSET_TOGGLE)
 875                         ? LFUN_INSET_TOGGLE : LFUN_INSET_MODIFY;
 876                 FuncRequest const tmpcmd = FuncRequest(code, cmd.argument());
 877                 // if there is an inset at cursor, see whether it
 878                 // handles the lfun, other start from scratch
 879                 Inset * inset = cur.nextInset();
 880                 if (!inset || !inset->getStatus(cur, tmpcmd, flag))
 881                         flag = lyx::getStatus(tmpcmd);
 882                 break;
 883         }
 884
 885         case LFUN_LABEL_GOTO: {
 886                 flag.enabled(!cmd.argument().empty()
 887                     || getInsetByCode<InsetRef>(cur, REF_CODE));
 888                 break;
 889         }
 890
 891         case LFUN_CHANGES_TRACK:
 892                 flag.enabled(true);
 893                 flag.setOnOff(buffer_.params().trackChanges);
 894                 break;
 895
 896         case LFUN_CHANGES_OUTPUT:
 897                 flag.enabled(true);
 898                 flag.setOnOff(buffer_.params().outputChanges);
 899                 break;
 900
 901         case LFUN_CHANGES_MERGE:
 902         case LFUN_CHANGE_NEXT:
 903         case LFUN_ALL_CHANGES_ACCEPT:
 904         case LFUN_ALL_CHANGES_REJECT:
 905                 // TODO: context-sensitive enabling of LFUNs
 906                 // In principle, these command should only be enabled if there
 907                 // is a change in the document. However, without proper
 908                 // optimizations, this will inevitably result in poor performance.
 909                 flag.enabled(true);
 910                 break;
 911
 912         case LFUN_BUFFER_TOGGLE_COMPRESSION: {
 913                 flag.setOnOff(buffer_.params().compressed);
 914                 break;
 915         }
 916
 917         case LFUN_SCREEN_UP:
 918         case LFUN_SCREEN_DOWN:
 919         case LFUN_SCROLL:
 920         case LFUN_SCREEN_UP_SELECT:
 921         case LFUN_SCREEN_DOWN_SELECT:
 922                 flag.enabled(true);
 923                 break;
 924
 925         case LFUN_LAYOUT_TABULAR:
 926                 flag.enabled(cur.innerInsetOfType(TABULAR_CODE));
 927                 break;
 928
 929         case LFUN_LAYOUT:
 930                 flag.enabled(!cur.inset().forceEmptyLayout(cur.idx()));
 931                 break;
 932
 933         case LFUN_LAYOUT_PARAGRAPH:
 934                 flag.enabled(cur.inset().allowParagraphCustomization(cur.idx()));
 935                 break;
 936
 937         case LFUN_INSET_SETTINGS: {
 938                 InsetCode code = cur.inset().lyxCode();
 939                 if (cmd.getArg(0) == insetName(code)) {
 940                         flag.enabled(true);
 941                         break;
 942                 }
 943                 bool enable = false;
 944                 InsetCode next_code = cur.nextInset()
 945                         ? cur.nextInset()->lyxCode() : NO_CODE;
 946                 switch (next_code) {
 947                         case TABULAR_CODE:
 948                         case ERT_CODE:
 949                         case FLOAT_CODE:
 950                         case WRAP_CODE:
 951                         case NOTE_CODE:
 952                         case BRANCH_CODE:
 953                         case BOX_CODE:
 954                         case LISTINGS_CODE:
 955                                 enable = (cmd.argument().empty() ||
 956                                           cmd.getArg(0) == insetName(next_code));
 957                                 break;
 958                         default:
 959                                 break;
 960                 }
 961                 flag.enabled(enable);
 962                 break;
 963         }
 964
 965         case LFUN_DIALOG_SHOW_NEW_INSET:
 966                 flag.enabled(cur.inset().lyxCode() != ERT_CODE &&
 967                         cur.inset().lyxCode() != LISTINGS_CODE);
 968                 if (cur.inset().lyxCode() == CAPTION_CODE) {
 969                         FuncStatus flag;
 970                         if (cur.inset().getStatus(cur, cmd, flag))
 971                                 return flag;
 972                 }
 973                 break;
 974
 975         default:
 976                 flag.enabled(false);
 977         }
 978
 979         return flag;
 980 }
 981
 982
 983 bool BufferView::dispatch(FuncRequest const & cmd)
 984 {
 985         //lyxerr << [ cmd = " << cmd << "]" << endl;
 986
 987         // Make sure that the cached BufferView is correct.
 988         LYXERR(Debug::ACTION, " action[" << cmd.action << ']'
 989                 << " arg[" << to_utf8(cmd.argument()) << ']'
 990                 << " x[" << cmd.x << ']'
 991                 << " y[" << cmd.y << ']'
 992                 << " button[" << cmd.button() << ']');
 993
 994         Cursor & cur = d->cursor_;
 995
 996         switch (cmd.action) {
 997
 998         case LFUN_UNDO:
 999                 cur.message(_("Undo"));
1000                 cur.clearSelection();
1001                 if (!cur.textUndo())
1002                         cur.message(_("No further undo information"));
1003                 else
1004                         processUpdateFlags(Update::Force | Update::FitCursor);
1005                 break;
1006
1007         case LFUN_REDO:
1008                 cur.message(_("Redo"));
1009                 cur.clearSelection();
1010                 if (!cur.textRedo())
1011                         cur.message(_("No further redo information"));
1012                 else
1013                         processUpdateFlags(Update::Force | Update::FitCursor);
1014                 break;
1015
1016         case LFUN_FONT_STATE:
1017                 cur.message(cur.currentState());
1018                 break;
1019
1020         case LFUN_BOOKMARK_SAVE:
1021                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1022                 break;
1023
1024         case LFUN_LABEL_GOTO: {
1025                 docstring label = cmd.argument();
1026                 if (label.empty()) {
1027                         InsetRef * inset =
1028                                 getInsetByCode<InsetRef>(d->cursor_,
1029                                                          REF_CODE);
1030                         if (inset) {
1031                                 label = inset->getParam("reference");
1032                                 // persistent=false: use temp_bookmark
1033                                 saveBookmark(0);
1034                         }
1035                 }
1036
1037                 if (!label.empty())
1038                         gotoLabel(label);
1039                 break;
1040         }
1041
1042         case LFUN_INSET_EDIT: {
1043                 FuncRequest fr(cmd);
1044                 // if there is an inset at cursor, see whether it
1045                 // can be modified.
1046                 Inset * inset = cur.nextInset();
1047                 if (inset)
1048                         inset->dispatch(cur, fr);
1049                 // if it did not work, try the underlying inset.
1050                 if (!inset || !cur.result().dispatched())
1051                         cur.dispatch(cmd);
1052
1053                 if (!cur.result().dispatched())
1054                         // It did not work too; no action needed.
1055                         break;
1056         }
1057
1058         case LFUN_PARAGRAPH_GOTO: {
1059                 int const id = convert<int>(to_utf8(cmd.argument()));
1060                 int i = 0;
1061                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1062                         b = theBufferList().next(b)) {
1063
1064                         DocIterator dit = b->getParFromID(id);
1065                         if (dit.atEnd()) {
1066                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1067                                 ++i;
1068                                 continue;
1069                         }
1070                         LYXERR(Debug::INFO, "Paragraph " << dit.paragraph().id()
1071                                 << " found in buffer `"
1072                                 << b->absFileName() << "'.");
1073
1074                         if (b == &buffer_) {
1075                                 // Set the cursor
1076                                 setCursor(dit);
1077                                 processUpdateFlags(Update::Force | Update::FitCursor);
1078                         } else {
1079                                 // Switch to other buffer view and resend cmd
1080                                 theLyXFunc().dispatch(FuncRequest(
1081                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1082                                 theLyXFunc().dispatch(cmd);
1083                         }
1084                         break;
1085                 }
1086                 break;
1087         }
1088
1089         case LFUN_NOTE_NEXT:
1090                 gotoInset(this, NOTE_CODE, false);
1091                 break;
1092
1093         case LFUN_REFERENCE_NEXT: {
1094                 vector<InsetCode> tmp;
1095                 tmp.push_back(LABEL_CODE);
1096                 tmp.push_back(REF_CODE);
1097                 gotoInset(this, tmp, true);
1098                 break;
1099         }
1100
1101         case LFUN_CHANGES_TRACK:
1102                 buffer_.params().trackChanges = !buffer_.params().trackChanges;
1103                 break;
1104
1105         case LFUN_CHANGES_OUTPUT:
1106                 buffer_.params().outputChanges = !buffer_.params().outputChanges;
1107                 if (buffer_.params().outputChanges) {
1108                         bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
1109                         bool xcolorsoul = LaTeXFeatures::isAvailable("soul") &&
1110                                           LaTeXFeatures::isAvailable("xcolor");
1111
1112                         if (!dvipost && !xcolorsoul) {
1113                                 Alert::warning(_("Changes not shown in LaTeX output"),
1114                                                _("Changes will not be highlighted in LaTeX output, "
1115                                                  "because neither dvipost nor xcolor/soul are installed.\n"
1116                                                  "Please install these packages or redefine "
1117                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1118                         } else if (!xcolorsoul) {
1119                                 Alert::warning(_("Changes not shown in LaTeX output"),
1120                                                _("Changes will not be highlighted in LaTeX output "
1121                                                  "when using pdflatex, because xcolor and soul are not installed.\n"
1122                                                  "Please install both packages or redefine "
1123                                                  "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
1124                         }
1125                 }
1126                 break;
1127
1128         case LFUN_CHANGE_NEXT:
1129                 findNextChange(this);
1130                 break;
1131
1132         case LFUN_CHANGES_MERGE:
1133                 if (findNextChange(this))
1134                         showDialog("changes");
1135                 break;
1136
1137         case LFUN_ALL_CHANGES_ACCEPT:
1138                 // select complete document
1139                 d->cursor_.reset(buffer_.inset());
1140                 d->cursor_.selHandle(true);
1141                 buffer_.text().cursorBottom(d->cursor_);
1142                 // accept everything in a single step to support atomic undo
1143                 buffer_.text().acceptOrRejectChanges(d->cursor_, Text::ACCEPT);
1144                 break;
1145
1146         case LFUN_ALL_CHANGES_REJECT:
1147                 // select complete document
1148                 d->cursor_.reset(buffer_.inset());
1149                 d->cursor_.selHandle(true);
1150                 buffer_.text().cursorBottom(d->cursor_);
1151                 // reject everything in a single step to support atomic undo
1152                 // Note: reject does not work recursively; the user may have to repeat the operation
1153                 buffer_.text().acceptOrRejectChanges(d->cursor_, Text::REJECT);
1154                 break;
1155
1156         case LFUN_WORD_FIND: {
1157                 FuncRequest req = cmd;
1158                 if (cmd.argument().empty() && !d->search_request_cache_.argument().empty())
1159                         req = d->search_request_cache_;
1160                 if (find(this, req))
1161                         showCursor();
1162                 else
1163                         message(_("String not found!"));
1164                 d->search_request_cache_ = req;
1165                 break;
1166         }
1167
1168         case LFUN_WORD_REPLACE: {
1169                 bool has_deleted = false;
1170                 if (cur.selection()) {
1171                         DocIterator beg = cur.selectionBegin();
1172                         DocIterator end = cur.selectionEnd();
1173                         if (beg.pit() == end.pit()) {
1174                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1175                                         if (cur.paragraph().isDeleted(p))
1176                                                 has_deleted = true;
1177                                 }
1178                         }
1179                 }
1180                 replace(this, cmd, has_deleted);
1181                 break;
1182         }
1183
1184         case LFUN_MARK_OFF:
1185                 cur.clearSelection();
1186                 cur.resetAnchor();
1187                 cur.message(from_utf8(N_("Mark off")));
1188                 break;
1189
1190         case LFUN_MARK_ON:
1191                 cur.clearSelection();
1192                 cur.mark() = true;
1193                 cur.resetAnchor();
1194                 cur.message(from_utf8(N_("Mark on")));
1195                 break;
1196
1197         case LFUN_MARK_TOGGLE:
1198                 cur.clearSelection();
1199                 if (cur.mark()) {
1200                         cur.mark() = false;
1201                         cur.message(from_utf8(N_("Mark removed")));
1202                 } else {
1203                         cur.mark() = true;
1204                         cur.message(from_utf8(N_("Mark set")));
1205                 }
1206                 cur.resetAnchor();
1207                 break;
1208
1209         case LFUN_SCREEN_RECENTER:
1210                 showCursor();
1211                 break;
1212
1213         case LFUN_BIBTEX_DATABASE_ADD: {
1214                 Cursor tmpcur = d->cursor_;
1215                 findInset(tmpcur, BIBTEX_CODE, false);
1216                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1217                                                 BIBTEX_CODE);
1218                 if (inset) {
1219                         if (inset->addDatabase(cmd.argument()))
1220                                 buffer_.updateBibfilesCache();
1221                 }
1222                 break;
1223         }
1224
1225         case LFUN_BIBTEX_DATABASE_DEL: {
1226                 Cursor tmpcur = d->cursor_;
1227                 findInset(tmpcur, BIBTEX_CODE, false);
1228                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1229                                                 BIBTEX_CODE);
1230                 if (inset) {
1231                         if (inset->delDatabase(cmd.argument()))
1232                                 buffer_.updateBibfilesCache();
1233                 }
1234                 break;
1235         }
1236
1237         case LFUN_STATISTICS: {
1238                 DocIterator from, to;
1239                 if (cur.selection()) {
1240                         from = cur.selectionBegin();
1241                         to = cur.selectionEnd();
1242                 } else {
1243                         from = doc_iterator_begin(buffer_.inset());
1244                         to = doc_iterator_end(buffer_.inset());
1245                 }
1246                 int const words = countWords(from, to);
1247                 int const chars = countChars(from, to, false);
1248                 int const chars_blanks = countChars(from, to, true);
1249                 docstring message;
1250                 if (cur.selection())
1251                         message = _("Statistics for the selection:");
1252                 else
1253                         message = _("Statistics for the document:");
1254                 message += "\n\n";
1255                 if (words != 1)
1256                         message += bformat(_("%1$d words"), words);
1257                 else
1258                         message += _("One word");
1259                 message += "\n";
1260                 if (chars_blanks != 1)
1261                         message += bformat(_("%1$d characters (including blanks)"),
1262                                           chars_blanks);
1263                 else
1264                         message += _("One character (including blanks)");
1265                 message += "\n";
1266                 if (chars != 1)
1267                         message += bformat(_("%1$d characters (excluding blanks)"),
1268                                           chars);
1269                 else
1270                         message += _("One character (excluding blanks)");
1271
1272                 Alert::information(_("Statistics"), message);
1273         }
1274                 break;
1275
1276         case LFUN_BUFFER_TOGGLE_COMPRESSION:
1277                 // turn compression on/off
1278                 buffer_.params().compressed = !buffer_.params().compressed;
1279                 break;
1280
1281         case LFUN_NEXT_INSET_TOGGLE: {
1282                 // this is the real function we want to invoke
1283                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.origin);
1284                 // if there is an inset at cursor, see whether it
1285                 // wants to toggle.
1286                 Inset * inset = cur.nextInset();
1287                 if (inset) {
1288                         if (inset->isActive()) {
1289                                 Cursor tmpcur = cur;
1290                                 tmpcur.pushBackward(*inset);
1291                                 inset->dispatch(tmpcur, tmpcmd);
1292                                 if (tmpcur.result().dispatched()) {
1293                                         cur.dispatched();
1294                                 }
1295                         } else if (inset->editable() == Inset::IS_EDITABLE) {
1296                                 inset->edit(cur, true);
1297                         }
1298                 }
1299                 // if it did not work, try the underlying inset.
1300                 if (!inset || !cur.result().dispatched())
1301                         cur.dispatch(tmpcmd);
1302
1303                 if (!cur.result().dispatched())
1304                         // It did not work too; no action needed.
1305                         break;
1306                 cur.clearSelection();
1307                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1308                 break;
1309         }
1310
1311         case LFUN_NEXT_INSET_MODIFY: {
1312                 // this is the real function we want to invoke
1313                 FuncRequest tmpcmd = FuncRequest(LFUN_INSET_MODIFY, cmd.argument());
1314                 // if there is an inset at cursor, see whether it
1315                 // can be modified.
1316                 Inset * inset = cur.nextInset();
1317                 if (inset)
1318                         inset->dispatch(cur, tmpcmd);
1319                 // if it did not work, try the underlying inset.
1320                 if (!inset || !cur.result().dispatched())
1321                         cur.dispatch(tmpcmd);
1322
1323                 if (!cur.result().dispatched())
1324                         // It did not work too; no action needed.
1325                         break;
1326                 cur.clearSelection();
1327                 processUpdateFlags(Update::Force | Update::FitCursor);
1328                 break;
1329         }
1330
1331         case LFUN_SCREEN_UP:
1332         case LFUN_SCREEN_DOWN: {
1333                 Point p = getPos(cur, cur.boundary());
1334                 if (p.y_ < 0 || p.y_ > height_) {
1335                         // The cursor is off-screen so recenter before proceeding.
1336                         showCursor();
1337                         p = getPos(cur, cur.boundary());
1338                 }
1339                 scroll(cmd.action == LFUN_SCREEN_UP? - height_ : height_);
1340                 cur.reset(buffer_.inset());
1341                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_);
1342                 //FIXME: what to do with cur.x_target()?
1343                 cur.finishUndo();
1344                 break;
1345         }
1346
1347         case LFUN_SCROLL:
1348                 lfunScroll(cmd);
1349                 break;
1350
1351         case LFUN_SCREEN_UP_SELECT: {
1352                 cur.selHandle(true);
1353                 if (isTopScreen()) {
1354                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1355                         cur.finishUndo();
1356                         break;
1357                 }
1358                 int y = getPos(cur, cur.boundary()).y_;
1359                 int const ymin = y - height_ + defaultRowHeight();
1360                 while (y > ymin && cur.up())
1361                         y = getPos(cur, cur.boundary()).y_;
1362
1363                 cur.finishUndo();
1364                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1365                 break;
1366         }
1367
1368         case LFUN_SCREEN_DOWN_SELECT: {
1369                 cur.selHandle(true);
1370                 if (isBottomScreen()) {
1371                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1372                         cur.finishUndo();
1373                         break;
1374                 }
1375                 int y = getPos(cur, cur.boundary()).y_;
1376                 int const ymax = y + height_ - defaultRowHeight();
1377                 while (y < ymax && cur.down())
1378                         y = getPos(cur, cur.boundary()).y_;
1379
1380                 cur.finishUndo();
1381                 processUpdateFlags(Update::SinglePar | Update::FitCursor);
1382                 break;
1383         }
1384
1385         default:
1386                 return false;
1387         }
1388
1389         return true;
1390 }
1391
1392
1393 docstring const BufferView::requestSelection()
1394 {
1395         Cursor & cur = d->cursor_;
1396
1397         if (!cur.selection()) {
1398                 d->xsel_cache_.set = false;
1399                 return docstring();
1400         }
1401
1402         if (!d->xsel_cache_.set ||
1403             cur.top() != d->xsel_cache_.cursor ||
1404             cur.anchor_.top() != d->xsel_cache_.anchor)
1405         {
1406                 d->xsel_cache_.cursor = cur.top();
1407                 d->xsel_cache_.anchor = cur.anchor_.top();
1408                 d->xsel_cache_.set = cur.selection();
1409                 return cur.selectionAsString(false);
1410         }
1411         return docstring();
1412 }
1413
1414
1415 void BufferView::clearSelection()
1416 {
1417         d->cursor_.clearSelection();
1418         // Clear the selection buffer. Otherwise a subsequent
1419         // middle-mouse-button paste would use the selection buffer,
1420         // not the more current external selection.
1421         cap::clearSelection();
1422         d->xsel_cache_.set = false;
1423         // The buffer did not really change, but this causes the
1424         // redraw we need because we cleared the selection above.
1425         buffer_.changed();
1426 }
1427
1428
1429 void BufferView::resize(int width, int height)
1430 {
1431         // Update from work area
1432         width_ = width;
1433         height_ = height;
1434
1435         // Clear the paragraph height cache.
1436         d->par_height_.clear();
1437         // Redo the metrics.
1438         updateMetrics();
1439 }
1440
1441
1442 Inset const * BufferView::getCoveringInset(Text const & text,
1443                 int x, int y) const
1444 {
1445         TextMetrics & tm = d->text_metrics_[&text];
1446         Inset * inset = tm.checkInsetHit(x, y);
1447         if (!inset)
1448                 return 0;
1449
1450         if (!inset->descendable())
1451                 // No need to go further down if the inset is not
1452                 // descendable.
1453                 return inset;
1454
1455         size_t cell_number = inset->nargs();
1456         // Check all the inner cell.
1457         for (size_t i = 0; i != cell_number; ++i) {
1458                 Text const * inner_text = inset->getText(i);
1459                 if (inner_text) {
1460                         // Try deeper.
1461                         Inset const * inset_deeper =
1462                                 getCoveringInset(*inner_text, x, y);
1463                         if (inset_deeper)
1464                                 return inset_deeper;
1465                 }
1466         }
1467
1468         return inset;
1469 }
1470
1471
1472 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
1473 {
1474         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
1475
1476         // This is only called for mouse related events including
1477         // LFUN_FILE_OPEN generated by drag-and-drop.
1478         FuncRequest cmd = cmd0;
1479
1480         Cursor old = cursor();
1481         Cursor cur(*this);
1482         cur.push(buffer_.inset());
1483         cur.selection() = d->cursor_.selection();
1484
1485         // Either the inset under the cursor or the
1486         // surrounding Text will handle this event.
1487
1488         // make sure we stay within the screen...
1489         cmd.y = min(max(cmd.y, -1), height_);
1490
1491         if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
1492
1493                 // Get inset under mouse, if there is one.
1494                 Inset const * covering_inset =
1495                         getCoveringInset(buffer_.text(), cmd.x, cmd.y);
1496                 if (covering_inset == d->last_inset_)
1497                         // Same inset, no need to do anything...
1498                         return;
1499
1500                 bool need_redraw = false;
1501                 // const_cast because of setMouseHover().
1502                 Inset * inset = const_cast<Inset *>(covering_inset);
1503                 if (d->last_inset_)
1504                         // Remove the hint on the last hovered inset (if any).
1505                         need_redraw |= d->last_inset_->setMouseHover(false);
1506                 if (inset)
1507                         // Highlighted the newly hovered inset (if any).
1508                         need_redraw |= inset->setMouseHover(true);
1509                 d->last_inset_ = inset;
1510                 if (!need_redraw)
1511                         return;
1512
1513                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
1514                         << cmd.x << ", " << cmd.y << ")");
1515
1516                 d->update_strategy_ = DecorationUpdate;
1517
1518                 // This event (moving without mouse click) is not passed further.
1519                 // This should be changed if it is further utilized.
1520                 buffer_.changed();
1521                 return;
1522         }
1523
1524         // Build temporary cursor.
1525         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x, cmd.y);
1526
1527         // Put anchor at the same position.
1528         cur.resetAnchor();
1529
1530         // Try to dispatch to an non-editable inset near this position
1531         // via the temp cursor. If the inset wishes to change the real
1532         // cursor it has to do so explicitly by using
1533         //  cur.bv().cursor() = cur;  (or similar)
1534         if (inset)
1535                 inset->dispatch(cur, cmd);
1536
1537         // Now dispatch to the temporary cursor. If the real cursor should
1538         // be modified, the inset's dispatch has to do so explicitly.
1539         if (!inset || !cur.result().dispatched())
1540                 cur.dispatch(cmd);
1541
1542         // Notify left insets
1543         if (cur != old) {
1544                 old.fixIfBroken();
1545                 bool badcursor = notifyCursorLeaves(old, cur);
1546                 if (badcursor)
1547                         cursor().fixIfBroken();
1548         }
1549
1550         // Do we have a selection?
1551         theSelection().haveSelection(cursor().selection());
1552
1553         // If the command has been dispatched,
1554         if (cur.result().dispatched() || cur.result().update())
1555                 processUpdateFlags(cur.result().update());
1556 }
1557
1558
1559 void BufferView::lfunScroll(FuncRequest const & cmd)
1560 {
1561         string const scroll_type = cmd.getArg(0);
1562         int const scroll_step =
1563                 (scroll_type == "line") ? d->scrollbarParameters_.single_step
1564                 : (scroll_type == "page") ? d->scrollbarParameters_.page_step : 0;
1565         if (scroll_step == 0)
1566                 return;
1567         string const scroll_quantity = cmd.getArg(1);
1568         if (scroll_quantity == "up")
1569                 scrollUp(scroll_step);
1570         else if (scroll_quantity == "down")
1571                 scrollDown(scroll_step);
1572         else {
1573                 int const scroll_value = convert<int>(scroll_quantity);
1574                 if (scroll_value)
1575                         scroll(scroll_step * scroll_value);
1576         }
1577 }
1578
1579
1580 void BufferView::scroll(int y)
1581 {
1582         if (y > 0)
1583                 scrollDown(y);
1584         else if (y < 0)
1585                 scrollUp(-y);
1586 }
1587
1588
1589 void BufferView::scrollDown(int offset)
1590 {
1591         Text * text = &buffer_.text();
1592         TextMetrics & tm = d->text_metrics_[text];
1593         int ymax = height_ + offset;
1594         while (true) {
1595                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
1596                 int bottom_pos = last.second->position() + last.second->descent();
1597                 if (last.first + 1 == int(text->paragraphs().size())) {
1598                         if (bottom_pos <= height_)
1599                                 return;
1600                         offset = min(offset, bottom_pos - height_);
1601                         break;
1602                 }
1603                 if (bottom_pos > ymax)
1604                         break;
1605                 tm.newParMetricsDown();
1606         }
1607         d->anchor_ypos_ -= offset;
1608         updateMetrics();
1609         buffer_.changed();
1610 }
1611
1612
1613 void BufferView::scrollUp(int offset)
1614 {
1615         Text * text = &buffer_.text();
1616         TextMetrics & tm = d->text_metrics_[text];
1617         int ymin = - offset;
1618         while (true) {
1619                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
1620                 int top_pos = first.second->position() - first.second->ascent();
1621                 if (first.first == 0) {
1622                         if (top_pos >= 0)
1623                                 return;
1624                         offset = min(offset, - top_pos);
1625                         break;
1626                 }
1627                 if (top_pos < ymin)
1628                         break;
1629                 tm.newParMetricsUp();
1630         }
1631         d->anchor_ypos_ += offset;
1632         updateMetrics();
1633         buffer_.changed();
1634 }
1635
1636
1637 void BufferView::setCursorFromRow(int row)
1638 {
1639         int tmpid = -1;
1640         int tmppos = -1;
1641
1642         buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
1643
1644         d->cursor_.reset(buffer_.inset());
1645         if (tmpid == -1)
1646                 buffer_.text().setCursor(d->cursor_, 0, 0);
1647         else
1648                 buffer_.text().setCursor(d->cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
1649 }
1650
1651
1652 void BufferView::gotoLabel(docstring const & label)
1653 {
1654         Toc & toc = buffer().tocBackend().toc("label");
1655         TocIterator toc_it = toc.begin();
1656         TocIterator end = toc.end();
1657         for (; toc_it != end; ++toc_it) {
1658                 if (label == toc_it->str())
1659                         dispatch(toc_it->action());
1660         }
1661         //FIXME: We could do a bit more searching thanks to this:
1662         //InsetLabel const * inset = buffer_.insetLabel(label);
1663 }
1664
1665
1666 TextMetrics const & BufferView::textMetrics(Text const * t) const
1667 {
1668         return const_cast<BufferView *>(this)->textMetrics(t);
1669 }
1670
1671
1672 TextMetrics & BufferView::textMetrics(Text const * t)
1673 {
1674         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
1675         if (tmc_it == d->text_metrics_.end()) {
1676                 tmc_it = d->text_metrics_.insert(
1677                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
1678         }
1679         return tmc_it->second;
1680 }
1681
1682
1683 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
1684                 pit_type pit) const
1685 {
1686         return textMetrics(t).parMetrics(pit);
1687 }
1688
1689
1690 int BufferView::workHeight() const
1691 {
1692         return height_;
1693 }
1694
1695
1696 void BufferView::setCursor(DocIterator const & dit)
1697 {
1698         size_t const n = dit.depth();
1699         for (size_t i = 0; i < n; ++i)
1700                 dit[i].inset().edit(d->cursor_, true);
1701
1702         d->cursor_.setCursor(dit);
1703         d->cursor_.selection() = false;
1704 }
1705
1706
1707 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
1708 {
1709         // Would be wrong to delete anything if we have a selection.
1710         if (cur.selection())
1711                 return false;
1712
1713         bool need_anchor_change = false;
1714         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
1715                 need_anchor_change);
1716
1717         if (need_anchor_change)
1718                 cur.resetAnchor();
1719
1720         if (!changed)
1721                 return false;
1722
1723         d->cursor_ = cur;
1724
1725         updateLabels(buffer_);
1726
1727         updateMetrics();
1728         buffer_.changed();
1729         return true;
1730 }
1731
1732
1733 bool BufferView::mouseSetCursor(Cursor & cur, bool select)
1734 {
1735         LASSERT(&cur.bv() == this, /**/);
1736
1737         if (!select)
1738                 // this event will clear selection so we save selection for
1739                 // persistent selection
1740                 cap::saveSelection(cursor());
1741
1742         // Has the cursor just left the inset?
1743         bool badcursor = false;
1744         bool leftinset = (&d->cursor_.inset() != &cur.inset());
1745         if (leftinset) {
1746                 d->cursor_.fixIfBroken();
1747                 badcursor = notifyCursorLeaves(d->cursor_, cur);
1748                 if (badcursor)
1749                         cur.fixIfBroken();
1750         }
1751
1752         // FIXME: shift-mouse selection doesn't work well across insets.
1753         bool do_selection = select && &d->cursor_.anchor().inset() == &cur.inset();
1754
1755         // do the dEPM magic if needed
1756         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
1757         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
1758         // the leftinset bool would not be necessary (badcursor instead).
1759         bool update = leftinset;
1760         if (!do_selection && !badcursor && d->cursor_.inTexted())
1761                 update |= checkDepm(cur, d->cursor_);
1762
1763         d->cursor_.setCursor(cur);
1764         d->cursor_.boundary(cur.boundary());
1765         if (do_selection)
1766                 d->cursor_.setSelection();
1767         else
1768                 d->cursor_.clearSelection();
1769
1770         d->cursor_.finishUndo();
1771         d->cursor_.setCurrentFont();
1772         return update;
1773 }
1774
1775
1776 void BufferView::putSelectionAt(DocIterator const & cur,
1777                                 int length, bool backwards)
1778 {
1779         d->cursor_.clearSelection();
1780
1781         setCursor(cur);
1782
1783         if (length) {
1784                 if (backwards) {
1785                         d->cursor_.pos() += length;
1786                         d->cursor_.setSelection(d->cursor_, -length);
1787                 } else
1788                         d->cursor_.setSelection(d->cursor_, length);
1789         }
1790         // Ensure a redraw happens in any case because the new selection could
1791         // possibly be on the same screen as the previous selection.
1792         processUpdateFlags(Update::Force | Update::FitCursor);
1793 }
1794
1795
1796 Cursor & BufferView::cursor()
1797 {
1798         return d->cursor_;
1799 }
1800
1801
1802 Cursor const & BufferView::cursor() const
1803 {
1804         return d->cursor_;
1805 }
1806
1807
1808 pit_type BufferView::anchor_ref() const
1809 {
1810         return d->anchor_pit_;
1811 }
1812
1813
1814 bool BufferView::singleParUpdate()
1815 {
1816         Text & buftext = buffer_.text();
1817         pit_type const bottom_pit = d->cursor_.bottom().pit();
1818         TextMetrics & tm = textMetrics(&buftext);
1819         int old_height = tm.parMetrics(bottom_pit).height();
1820
1821         // make sure inline completion pointer is ok
1822         if (d->inlineCompletionPos_.fixIfBroken())
1823                 d->inlineCompletionPos_ = DocIterator();
1824
1825         // In Single Paragraph mode, rebreak only
1826         // the (main text, not inset!) paragraph containing the cursor.
1827         // (if this paragraph contains insets etc., rebreaking will
1828         // recursively descend)
1829         tm.redoParagraph(bottom_pit);
1830         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
1831         if (pm.height() != old_height)
1832                 // Paragraph height has changed so we cannot proceed to
1833                 // the singlePar optimisation.
1834                 return false;
1835
1836         d->update_strategy_ = SingleParUpdate;
1837
1838         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
1839                 << " y2: " << pm.position() + pm.descent()
1840                 << " pit: " << bottom_pit
1841                 << " singlepar: 1");
1842         return true;
1843 }
1844
1845
1846 void BufferView::updateMetrics()
1847 {
1848         Text & buftext = buffer_.text();
1849         pit_type const npit = int(buftext.paragraphs().size());
1850
1851         // Clear out the position cache in case of full screen redraw,
1852         d->coord_cache_.clear();
1853
1854         // Clear out paragraph metrics to avoid having invalid metrics
1855         // in the cache from paragraphs not relayouted below
1856         // The complete text metrics will be redone.
1857         d->text_metrics_.clear();
1858
1859         TextMetrics & tm = textMetrics(&buftext);
1860
1861         // make sure inline completion pointer is ok
1862         if (d->inlineCompletionPos_.fixIfBroken())
1863                 d->inlineCompletionPos_ = DocIterator();
1864
1865         if (d->anchor_pit_ >= npit)
1866                 // The anchor pit must have been deleted...
1867                 d->anchor_pit_ = npit - 1;
1868
1869         // Rebreak anchor paragraph.
1870         tm.redoParagraph(d->anchor_pit_);
1871         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
1872
1873         // position anchor
1874         if (d->anchor_pit_ == 0) {
1875                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
1876
1877                 // Complete buffer visible? Then it's easy.
1878                 if (scrollRange == 0)
1879                         d->anchor_ypos_ = anchor_pm.ascent();
1880
1881                 // FIXME: Some clever handling needed to show
1882                 // the _first_ paragraph up to the top if the cursor is
1883                 // in the first line.
1884         }
1885         anchor_pm.setPosition(d->anchor_ypos_);
1886
1887         LYXERR(Debug::PAINTING, "metrics: "
1888                 << " anchor pit = " << d->anchor_pit_
1889                 << " anchor ypos = " << d->anchor_ypos_);
1890
1891         // Redo paragraphs above anchor if necessary.
1892         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
1893         // We are now just above the anchor paragraph.
1894         pit_type pit1 = d->anchor_pit_ - 1;
1895         for (; pit1 >= 0 && y1 >= 0; --pit1) {
1896                 tm.redoParagraph(pit1);
1897                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
1898                 y1 -= pm.descent();
1899                 // Save the paragraph position in the cache.
1900                 pm.setPosition(y1);
1901                 y1 -= pm.ascent();
1902         }
1903
1904         // Redo paragraphs below the anchor if necessary.
1905         int y2 = d->anchor_ypos_ + anchor_pm.descent();
1906         // We are now just below the anchor paragraph.
1907         pit_type pit2 = d->anchor_pit_ + 1;
1908         for (; pit2 < npit && y2 <= height_; ++pit2) {
1909                 tm.redoParagraph(pit2);
1910                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
1911                 y2 += pm.ascent();
1912                 // Save the paragraph position in the cache.
1913                 pm.setPosition(y2);
1914                 y2 += pm.descent();
1915         }
1916
1917         LYXERR(Debug::PAINTING, "Metrics: "
1918                 << " anchor pit = " << d->anchor_pit_
1919                 << " anchor ypos = " << d->anchor_ypos_
1920                 << " y1 = " << y1
1921                 << " y2 = " << y2
1922                 << " pit1 = " << pit1
1923                 << " pit2 = " << pit2);
1924
1925         d->update_strategy_ = FullScreenUpdate;
1926
1927         if (lyxerr.debugging(Debug::WORKAREA)) {
1928                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
1929                 d->coord_cache_.dump();
1930         }
1931 }
1932
1933
1934 void BufferView::insertLyXFile(FileName const & fname)
1935 {
1936         LASSERT(d->cursor_.inTexted(), /**/);
1937
1938         // Get absolute path of file and add ".lyx"
1939         // to the filename if necessary
1940         FileName filename = fileSearch(string(), fname.absFilename(), "lyx");
1941
1942         docstring const disp_fn = makeDisplayPath(filename.absFilename());
1943         // emit message signal.
1944         message(bformat(_("Inserting document %1$s..."), disp_fn));
1945
1946         docstring res;
1947         Buffer buf("", false);
1948         if (buf.loadLyXFile(filename)) {
1949                 ErrorList & el = buffer_.errorList("Parse");
1950                 // Copy the inserted document error list into the current buffer one.
1951                 el = buf.errorList("Parse");
1952                 buffer_.undo().recordUndo(d->cursor_);
1953                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
1954                                              buf.params().documentClassPtr(), el);
1955                 res = _("Document %1$s inserted.");
1956         } else {
1957                 res = _("Could not insert document %1$s");
1958         }
1959
1960         updateMetrics();
1961         buffer_.changed();
1962         // emit message signal.
1963         message(bformat(res, disp_fn));
1964         buffer_.errors("Parse");
1965 }
1966
1967
1968 Point BufferView::coordOffset(DocIterator const & dit, bool boundary) const
1969 {
1970         int x = 0;
1971         int y = 0;
1972         int lastw = 0;
1973
1974         // Addup contribution of nested insets, from inside to outside,
1975         // keeping the outer paragraph for a special handling below
1976         for (size_t i = dit.depth() - 1; i >= 1; --i) {
1977                 CursorSlice const & sl = dit[i];
1978                 int xx = 0;
1979                 int yy = 0;
1980
1981                 // get relative position inside sl.inset()
1982                 sl.inset().cursorPos(*this, sl, boundary && (i + 1 == dit.depth()), xx, yy);
1983
1984                 // Make relative position inside of the edited inset relative to sl.inset()
1985                 x += xx;
1986                 y += yy;
1987
1988                 // In case of an RTL inset, the edited inset will be positioned to the left
1989                 // of xx:yy
1990                 if (sl.text()) {
1991                         bool boundary_i = boundary && i + 1 == dit.depth();
1992                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
1993                         if (rtl)
1994                                 x -= lastw;
1995                 }
1996
1997                 // remember width for the case that sl.inset() is positioned in an RTL inset
1998                 if (i && dit[i - 1].text()) {
1999                         // If this Inset is inside a Text Inset, retrieve the Dimension
2000                         // from the containing text instead of using Inset::dimension() which
2001                         // might not be implemented.
2002                         // FIXME (Abdel 23/09/2007): this is a bit messy because of the
2003                         // elimination of Inset::dim_ cache. This coordOffset() method needs
2004                         // to be rewritten in light of the new design.
2005                         Dimension const & dim = parMetrics(dit[i - 1].text(),
2006                                 dit[i - 1].pit()).insetDimension(&sl.inset());
2007                         lastw = dim.wid;
2008                 } else {
2009                         Dimension const dim = sl.inset().dimension(*this);
2010                         lastw = dim.wid;
2011                 }
2012
2013                 //lyxerr << "Cursor::getPos, i: "
2014                 // << i << " x: " << xx << " y: " << y << endl;
2015         }
2016
2017         // Add contribution of initial rows of outermost paragraph
2018         CursorSlice const & sl = dit[0];
2019         TextMetrics const & tm = textMetrics(sl.text());
2020         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
2021         LASSERT(!pm.rows().empty(), /**/);
2022         y -= pm.rows()[0].ascent();
2023 #if 1
2024         // FIXME: document this mess
2025         size_t rend;
2026         if (sl.pos() > 0 && dit.depth() == 1) {
2027                 int pos = sl.pos();
2028                 if (pos && boundary)
2029                         --pos;
2030 //              lyxerr << "coordOffset: boundary:" << boundary << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
2031                 rend = pm.pos2row(pos);
2032         } else
2033                 rend = pm.pos2row(sl.pos());
2034 #else
2035         size_t rend = pm.pos2row(sl.pos());
2036 #endif
2037         for (size_t rit = 0; rit != rend; ++rit)
2038                 y += pm.rows()[rit].height();
2039         y += pm.rows()[rend].ascent();
2040
2041         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2042
2043         // Make relative position from the nested inset now bufferview absolute.
2044         int xx = bottom_tm.cursorX(dit.bottom(), boundary && dit.depth() == 1);
2045         x += xx;
2046
2047         // In the RTL case place the nested inset at the left of the cursor in
2048         // the outer paragraph
2049         bool boundary_1 = boundary && 1 == dit.depth();
2050         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2051         if (rtl)
2052                 x -= lastw;
2053
2054         return Point(x, y);
2055 }
2056
2057
2058 Point BufferView::getPos(DocIterator const & dit, bool boundary) const
2059 {
2060         CursorSlice const & bot = dit.bottom();
2061         TextMetrics const & tm = textMetrics(bot.text());
2062         if (!tm.contains(bot.pit()))
2063                 return Point(-1, -1);
2064
2065         Point p = coordOffset(dit, boundary); // offset from outer paragraph
2066         p.y_ += tm.parMetrics(bot.pit()).position();
2067         return p;
2068 }
2069
2070
2071 void BufferView::draw(frontend::Painter & pain)
2072 {
2073         LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
2074         Text & text = buffer_.text();
2075         TextMetrics const & tm = d->text_metrics_[&text];
2076         int const y = tm.first().second->position();
2077         PainterInfo pi(this, pain);
2078
2079         switch (d->update_strategy_) {
2080
2081         case NoScreenUpdate:
2082                 // If no screen painting is actually needed, only some the different
2083                 // coordinates of insets and paragraphs needs to be updated.
2084                 pi.full_repaint = true;
2085                 pi.pain.setDrawingEnabled(false);
2086                 tm.draw(pi, 0, y);
2087                 break;
2088
2089         case SingleParUpdate:
2090                 pi.full_repaint = false;
2091                 // In general, only the current row of the outermost paragraph
2092                 // will be redrawn. Particular cases where selection spans
2093                 // multiple paragraph are correctly detected in TextMetrics.
2094                 tm.draw(pi, 0, y);
2095                 break;
2096
2097         case DecorationUpdate:
2098                 // FIXME: We should also distinguish DecorationUpdate to avoid text
2099                 // drawing if possible. This is not possible to do easily right now
2100                 // because of the single backing pixmap.
2101
2102         case FullScreenUpdate:
2103                 // The whole screen, including insets, will be refreshed.
2104                 pi.full_repaint = true;
2105
2106                 // Clear background.
2107                 pain.fillRectangle(0, 0, width_, height_,
2108                         buffer_.inset().backgroundColor());
2109
2110                 // Draw everything.
2111                 tm.draw(pi, 0, y);
2112
2113                 // and possibly grey out below
2114                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2115                 int const y2 = lastpm.second->position() + lastpm.second->descent();
2116                 if (y2 < height_)
2117                         pain.fillRectangle(0, y2, width_, height_ - y2, Color_bottomarea);
2118                 break;
2119         }
2120         LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
2121
2122         // The scrollbar needs an update.
2123         updateScrollbar();
2124
2125         // Normalize anchor for next time
2126         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
2127         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
2128         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
2129                 ParagraphMetrics const & pm = tm.parMetrics(pit);
2130                 if (pm.position() + pm.descent() > 0) {
2131                         d->anchor_pit_ = pit;
2132                         d->anchor_ypos_ = pm.position();
2133                         break;
2134                 }
2135         }
2136         LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
2137                 << "  anchor ypos = " << d->anchor_ypos_);
2138 }
2139
2140
2141 void BufferView::message(docstring const & msg)
2142 {
2143         if (d->gui_)
2144                 d->gui_->message(msg);
2145 }
2146
2147
2148 void BufferView::showDialog(string const & name)
2149 {
2150         if (d->gui_)
2151                 d->gui_->showDialog(name, string());
2152 }
2153
2154
2155 void BufferView::showDialog(string const & name,
2156         string const & data, Inset * inset)
2157 {
2158         if (d->gui_)
2159                 d->gui_->showDialog(name, data, inset);
2160 }
2161
2162
2163 void BufferView::updateDialog(string const & name, string const & data)
2164 {
2165         if (d->gui_)
2166                 d->gui_->updateDialog(name, data);
2167 }
2168
2169
2170 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
2171 {
2172         d->gui_ = gui;
2173 }
2174
2175
2176 // FIXME: Move this out of BufferView again
2177 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
2178 {
2179         if (!fname.isReadableFile()) {
2180                 docstring const error = from_ascii(strerror(errno));
2181                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2182                 docstring const text =
2183                   bformat(_("Could not read the specified document\n"
2184                             "%1$s\ndue to the error: %2$s"), file, error);
2185                 Alert::error(_("Could not read file"), text);
2186                 return docstring();
2187         }
2188
2189         if (!fname.isReadableFile()) {
2190                 docstring const file = makeDisplayPath(fname.absFilename(), 50);
2191                 docstring const text =
2192                   bformat(_("%1$s\n is not readable."), file);
2193                 Alert::error(_("Could not open file"), text);
2194                 return docstring();
2195         }
2196
2197         // FIXME UNICODE: We don't know the encoding of the file
2198         docstring file_content = fname.fileContents("UTF-8");
2199         if (file_content.empty()) {
2200                 Alert::error(_("Reading not UTF-8 encoded file"),
2201                              _("The file is not UTF-8 encoded.\n"
2202                                "It will be read as local 8Bit-encoded.\n"
2203                                "If this does not give the correct result\n"
2204                                "then please change the encoding of the file\n"
2205                                "to UTF-8 with a program other than LyX.\n"));
2206                 file_content = fname.fileContents("local8bit");
2207         }
2208
2209         return normalize_c(file_content);
2210 }
2211
2212
2213 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
2214 {
2215         docstring const tmpstr = contentsOfPlaintextFile(f);
2216
2217         if (tmpstr.empty())
2218                 return;
2219
2220         Cursor & cur = cursor();
2221         cap::replaceSelection(cur);
2222         buffer_.undo().recordUndo(cur);
2223         if (asParagraph)
2224                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr);
2225         else
2226                 cur.innerText()->insertStringAsLines(cur, tmpstr);
2227
2228         updateMetrics();
2229         buffer_.changed();
2230 }
2231
2232
2233 docstring const & BufferView::inlineCompletion() const
2234 {
2235         return d->inlineCompletion_;
2236 }
2237
2238
2239 size_t const & BufferView::inlineCompletionUniqueChars() const
2240 {
2241         return d->inlineCompletionUniqueChars_;
2242 }
2243
2244
2245 DocIterator const & BufferView::inlineCompletionPos() const
2246 {
2247         return d->inlineCompletionPos_;
2248 }
2249
2250
2251 bool samePar(DocIterator const & a, DocIterator const & b)
2252 {
2253         if (a.empty() && b.empty())
2254                 return true;
2255         if (a.empty() || b.empty())
2256                 return false;
2257         return &a.innerParagraph() == &b.innerParagraph();
2258 }
2259
2260
2261 void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
2262         docstring const & completion, size_t uniqueChars)
2263 {
2264         uniqueChars = min(completion.size(), uniqueChars);
2265         bool changed = d->inlineCompletion_ != completion
2266                 || d->inlineCompletionUniqueChars_ != uniqueChars;
2267         bool singlePar = true;
2268         d->inlineCompletion_ = completion;
2269         d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
2270
2271         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
2272
2273         // at new position?
2274         DocIterator const & old = d->inlineCompletionPos_;
2275         if (old != pos) {
2276                 //lyxerr << "inlineCompletionPos changed" << std::endl;
2277                 // old or pos are in another paragraph?
2278                 if ((!samePar(cur, pos) && !pos.empty())
2279                     || (!samePar(cur, old) && !old.empty())) {
2280                         singlePar = false;
2281                         //lyxerr << "different paragraph" << std::endl;
2282                 }
2283                 d->inlineCompletionPos_ = pos;
2284         }
2285
2286         // set update flags
2287         if (changed) {
2288                 if (singlePar && !(cur.disp_.update() & Update::Force))
2289                         cur.updateFlags(cur.disp_.update() | Update::SinglePar);
2290                 else
2291                         cur.updateFlags(cur.disp_.update() | Update::Force);
2292         }
2293 }
2294
2295 } // namespace lyx