src/mathed/math_nestinset.C

   1 /**
   2  * \file math_nestinset.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author André Pönitz
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "math_nestinset.h"
  14
  15 #include "math_arrayinset.h"
  16 #include "math_biginset.h"
  17 #include "math_boxinset.h"
  18 #include "math_braceinset.h"
  19 #include "math_colorinset.h"
  20 #include "math_commentinset.h"
  21 #include "math_data.h"
  22 #include "math_deliminset.h"
  23 #include "math_factory.h"
  24 #include "math_hullinset.h"
  25 #include "math_mathmlstream.h"
  26 #include "math_macroarg.h"
  27 //#include "math_mboxinset.h"
  28 #include "math_parser.h"
  29 #include "math_scriptinset.h"
  30 #include "math_spaceinset.h"
  31 #include "math_symbolinset.h"
  32 #include "math_support.h"
  33 #include "math_unknowninset.h"
  34 #include "ref_inset.h"
  35
  36 #include "BufferView.h"
  37 #include "CutAndPaste.h"
  38 #include "FuncStatus.h"
  39 #include "LColor.h"
  40 #include "bufferview_funcs.h"
  41 #include "coordcache.h"
  42 #include "cursor.h"
  43 #include "debug.h"
  44 #include "dispatchresult.h"
  45 #include "funcrequest.h"
  46 #include "gettext.h"
  47 #include "outputparams.h"
  48 #include "undo.h"
  49
  50 #include "support/lstrings.h"
  51
  52 #include "frontends/Dialogs.h"
  53 #include "frontends/Gui.h"
  54 #include "frontends/LyXView.h"
  55 #include "frontends/Painter.h"
  56 #include "frontends/Selection.h"
  57 #include "frontends/nullpainter.h"
  58
  59 #include <sstream>
  60
  61 using lyx::cap::copySelection;
  62 using lyx::cap::grabAndEraseSelection;
  63 using lyx::cap::cutSelection;
  64 using lyx::cap::replaceSelection;
  65 using lyx::cap::selClearOrDel;
  66
  67 using lyx::frontend::Gui;
  68 using lyx::frontend::Clipboard;
  69
  70 using std::endl;
  71 using std::string;
  72 using std::istringstream;
  73
  74
  75 MathNestInset::MathNestInset(idx_type nargs)
  76         : cells_(nargs), lock_(false)
  77 {}
  78
  79
  80 MathInset::idx_type MathNestInset::nargs() const
  81 {
  82         return cells_.size();
  83 }
  84
  85
  86 MathArray & MathNestInset::cell(idx_type i)
  87 {
  88         return cells_[i];
  89 }
  90
  91
  92 MathArray const & MathNestInset::cell(idx_type i) const
  93 {
  94         return cells_[i];
  95 }
  96
  97
  98 void MathNestInset::cursorPos(CursorSlice const & sl, bool /*boundary*/,
  99         int & x, int & y) const
 100 {
 101 // FIXME: This is a hack. Ideally, the coord cache should not store
 102 // absolute positions, but relative ones. This would mean to call
 103 // setXY() not in MathArray::draw(), but in the parent insets' draw()
 104 // with the correctly adjusted x,y values. But this means that we'd have
 105 // to touch all (math)inset's draw() methods. Right now, we'll store
 106 // absolute value, and make them here relative, only to make them
 107 // absolute again when actually drawing the cursor. What a mess.
 108         BOOST_ASSERT(ptr_cmp(&sl.inset(), this));
 109         MathArray const & ar = sl.cell();
 110         if (!theCoords.getArrays().has(&ar)) {
 111                 // this can (semi-)legally happen if we just created this cell
 112                 // and it never has been drawn before. So don't ASSERT.
 113                 //lyxerr << "no cached data for array " << &ar << endl;
 114                 x = 0;
 115                 y = 0;
 116                 return;
 117         }
 118         Point const pt = theCoords.getArrays().xy(&ar);
 119         if (!theCoords.getInsets().has(this)) {
 120                 // same as above
 121                 //lyxerr << "no cached data for inset " << this << endl;
 122                 x = 0;
 123                 y = 0;
 124                 return;
 125         }
 126         Point const pt2 = theCoords.getInsets().xy(this);
 127         //lyxerr << "retrieving position cache for MathArray "
 128         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 129         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 130         y = pt.y_ - pt2.y_;
 131 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 132 //              << " asc: " << ascent() << "  des: " << descent()
 133 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 134         // move cursor visually into empty cells ("blue rectangles");
 135         if (ar.empty())
 136                 x += 2;
 137 }
 138
 139
 140 void MathNestInset::metrics(MetricsInfo const & mi) const
 141 {
 142         MetricsInfo m = mi;
 143         for (idx_type i = 0, n = nargs(); i != n; ++i)
 144                 cell(i).metrics(m);
 145 }
 146
 147
 148 bool MathNestInset::idxNext(LCursor & cur) const
 149 {
 150         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 151         if (cur.idx() == cur.lastidx())
 152                 return false;
 153         ++cur.idx();
 154         cur.pos() = 0;
 155         return true;
 156 }
 157
 158
 159 bool MathNestInset::idxRight(LCursor & cur) const
 160 {
 161         return idxNext(cur);
 162 }
 163
 164
 165 bool MathNestInset::idxPrev(LCursor & cur) const
 166 {
 167         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 168         if (cur.idx() == 0)
 169                 return false;
 170         --cur.idx();
 171         cur.pos() = cur.lastpos();
 172         return true;
 173 }
 174
 175
 176 bool MathNestInset::idxLeft(LCursor & cur) const
 177 {
 178         return idxPrev(cur);
 179 }
 180
 181
 182 bool MathNestInset::idxFirst(LCursor & cur) const
 183 {
 184         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 185         if (nargs() == 0)
 186                 return false;
 187         cur.idx() = 0;
 188         cur.pos() = 0;
 189         return true;
 190 }
 191
 192
 193 bool MathNestInset::idxLast(LCursor & cur) const
 194 {
 195         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 196         if (nargs() == 0)
 197                 return false;
 198         cur.idx() = cur.lastidx();
 199         cur.pos() = cur.lastpos();
 200         return true;
 201 }
 202
 203
 204 void MathNestInset::dump() const
 205 {
 206         WriteStream os(lyxerr);
 207         os << "---------------------------------------------\n";
 208         write(os);
 209         os << "\n";
 210         for (idx_type i = 0, n = nargs(); i != n; ++i)
 211                 os << cell(i) << "\n";
 212         os << "---------------------------------------------\n";
 213 }
 214
 215
 216 void MathNestInset::draw(PainterInfo & pi, int x, int y) const
 217 {
 218 #if 0
 219         if (lock_)
 220                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 221                                         LColor::mathlockbg);
 222 #endif
 223         setPosCache(pi, x, y);
 224 }
 225
 226
 227 void MathNestInset::drawSelection(PainterInfo & pi, int x, int y) const
 228 {
 229         // this should use the x/y values given, not the cached values
 230         LCursor & cur = pi.base.bv->cursor();
 231         if (!cur.selection())
 232                 return;
 233         if (!ptr_cmp(&cur.inset(), this))
 234                 return;
 235
 236         // FIXME: hack to get position cache warm
 237         static lyx::frontend::NullPainter nop;
 238         PainterInfo pinop(pi);
 239         pinop.pain = nop;
 240         draw(pinop, x, y);
 241
 242         CursorSlice s1 = cur.selBegin();
 243         CursorSlice s2 = cur.selEnd();
 244         //lyxerr << "MathNestInset::drawing selection: "
 245         //      << " s1: " << s1 << " s2: " << s2 << endl;
 246         if (s1.idx() == s2.idx()) {
 247                 MathArray const & c = cell(s1.idx());
 248                 int x1 = c.xo() + c.pos2x(s1.pos());
 249                 int y1 = c.yo() - c.ascent();
 250                 int x2 = c.xo() + c.pos2x(s2.pos());
 251                 int y2 = c.yo() + c.descent();
 252                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 253         //lyxerr << "MathNestInset::drawing selection 3: "
 254         //      << " x1: " << x1 << " x2: " << x2
 255         //      << " y1: " << y1 << " y2: " << y2 << endl;
 256         } else {
 257                 for (idx_type i = 0; i < nargs(); ++i) {
 258                         if (idxBetween(i, s1.idx(), s2.idx())) {
 259                                 MathArray const & c = cell(i);
 260                                 int x1 = c.xo();
 261                                 int y1 = c.yo() - c.ascent();
 262                                 int x2 = c.xo() + c.width();
 263                                 int y2 = c.yo() + c.descent();
 264                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 265                         }
 266                 }
 267         }
 268 }
 269
 270
 271 void MathNestInset::validate(LaTeXFeatures & features) const
 272 {
 273         for (idx_type i = 0; i < nargs(); ++i)
 274                 cell(i).validate(features);
 275 }
 276
 277
 278 void MathNestInset::replace(ReplaceData & rep)
 279 {
 280         for (idx_type i = 0; i < nargs(); ++i)
 281                 cell(i).replace(rep);
 282 }
 283
 284
 285 bool MathNestInset::contains(MathArray const & ar) const
 286 {
 287         for (idx_type i = 0; i < nargs(); ++i)
 288                 if (cell(i).contains(ar))
 289                         return true;
 290         return false;
 291 }
 292
 293
 294 bool MathNestInset::lock() const
 295 {
 296         return lock_;
 297 }
 298
 299
 300 void MathNestInset::lock(bool l)
 301 {
 302         lock_ = l;
 303 }
 304
 305
 306 bool MathNestInset::isActive() const
 307 {
 308         return nargs() > 0;
 309 }
 310
 311
 312 MathArray MathNestInset::glue() const
 313 {
 314         MathArray ar;
 315         for (size_t i = 0; i < nargs(); ++i)
 316                 ar.append(cell(i));
 317         return ar;
 318 }
 319
 320
 321 void MathNestInset::write(WriteStream & os) const
 322 {
 323         os << '\\' << name().c_str();
 324         for (size_t i = 0; i < nargs(); ++i)
 325                 os << '{' << cell(i) << '}';
 326         if (nargs() == 0)
 327                 os.pendingSpace(true);
 328         if (lock_ && !os.latex()) {
 329                 os << "\\lyxlock";
 330                 os.pendingSpace(true);
 331         }
 332 }
 333
 334
 335 void MathNestInset::normalize(NormalStream & os) const
 336 {
 337         os << '[' << name().c_str();
 338         for (size_t i = 0; i < nargs(); ++i)
 339                 os << ' ' << cell(i);
 340         os << ']';
 341 }
 342
 343
 344 int MathNestInset::latex(Buffer const &, std::ostream & os,
 345                         OutputParams const & runparams) const
 346 {
 347         WriteStream wi(os, runparams.moving_arg, true);
 348         write(wi);
 349         return wi.line();
 350 }
 351
 352
 353 bool MathNestInset::notifyCursorLeaves(LCursor & /*cur*/)
 354 {
 355 #ifdef WITH_WARNINGS
 356 #warning look here
 357 #endif
 358 #if 0
 359         MathArray & ar = cur.cell();
 360         // remove base-only "scripts"
 361         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 362                 MathScriptInset * p = operator[](i).nucleus()->asScriptInset();
 363                 if (p && p->nargs() == 1) {
 364                         MathArray ar = p->nuc();
 365                         erase(i);
 366                         insert(i, ar);
 367                         cur.adjust(i, ar.size() - 1);
 368                 }
 369         }
 370
 371         // glue adjacent font insets of the same kind
 372         for (pos_type i = 0; i + 1 < size(); ++i) {
 373                 MathFontInset * p = operator[](i).nucleus()->asFontInset();
 374                 MathFontInset const * q = operator[](i + 1)->asFontInset();
 375                 if (p && q && p->name() == q->name()) {
 376                         p->cell(0).append(q->cell(0));
 377                         erase(i + 1);
 378                         cur.adjust(i, -1);
 379                 }
 380         }
 381 #endif
 382         return false;
 383 }
 384
 385
 386 void MathNestInset::handleFont
 387         (LCursor & cur, string const & arg, string const & font)
 388 {
 389         // this whole function is a hack and won't work for incremental font
 390         // changes...
 391         recordUndo(cur, Undo::ATOMIC);
 392
 393         if (cur.inset().asMathInset()->name() == font)
 394                 cur.handleFont(font);
 395         else {
 396                 cur.handleNest(createMathInset(font));
 397                 cur.insert(arg);
 398         }
 399 }
 400
 401
 402 void MathNestInset::handleFont2(LCursor & cur, string const & arg)
 403 {
 404         recordUndo(cur, Undo::ATOMIC);
 405         LyXFont font;
 406         bool b;
 407         bv_funcs::string2font(arg, font, b);
 408         if (font.color() != LColor::inherit) {
 409                 MathAtom at = MathAtom(new MathColorInset(true, font.color()));
 410                 cur.handleNest(at, 0);
 411         }
 412 }
 413
 414
 415 void MathNestInset::doDispatch(LCursor & cur, FuncRequest & cmd)
 416 {
 417         //lyxerr << "MathNestInset: request: " << cmd << std::endl;
 418         //CursorSlice sl = cur.current();
 419
 420         switch (cmd.action) {
 421
 422         case LFUN_PASTE: {
 423                 recordUndo(cur);
 424                 cur.message(_("Paste"));
 425                 replaceSelection(cur);
 426                 size_t n = 0;
 427                 istringstream is(cmd.argument);
 428                 is >> n;
 429                 string const selection = lyx::cap::getSelection(cur.buffer(), n);
 430                 cur.niceInsert(selection);
 431                 cur.clearSelection(); // bug 393
 432                 cur.bv().switchKeyMap();
 433                 finishUndo();
 434                 break;
 435         }
 436
 437         case LFUN_CUT:
 438                 recordUndo(cur);
 439                 cutSelection(cur, true, true);
 440                 cur.message(_("Cut"));
 441                 // Prevent stale position >= size crash
 442                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 443                 cur.normalize();
 444                 break;
 445
 446         case LFUN_COPY:
 447                 copySelection(cur);
 448                 cur.message(_("Copy"));
 449                 break;
 450
 451         case LFUN_MOUSE_PRESS:
 452                 lfunMousePress(cur, cmd);
 453                 break;
 454
 455         case LFUN_MOUSE_MOTION:
 456                 lfunMouseMotion(cur, cmd);
 457                 break;
 458
 459         case LFUN_MOUSE_RELEASE:
 460                 lfunMouseRelease(cur, cmd);
 461                 break;
 462
 463         case LFUN_FINISHED_LEFT:
 464                 cur.bv().cursor() = cur;
 465                 break;
 466
 467         case LFUN_FINISHED_RIGHT:
 468                 ++cur.pos();
 469                 cur.bv().cursor() = cur;
 470                 break;
 471
 472         case LFUN_FINISHED_UP:
 473                 cur.bv().cursor() = cur;
 474                 break;
 475
 476         case LFUN_FINISHED_DOWN:
 477                 ++cur.pos();
 478                 cur.bv().cursor() = cur;
 479                 break;
 480
 481         case LFUN_CHAR_FORWARD_SELECT:
 482         case LFUN_CHAR_FORWARD:
 483                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 484                 cur.autocorrect() = false;
 485                 cur.clearTargetX();
 486                 cur.macroModeClose();
 487                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 488                         cur.pushLeft(*cur.nextAtom().nucleus());
 489                         cur.inset().idxFirst(cur);
 490                 } else if (cur.posRight() || idxRight(cur)
 491                         || cur.popRight() || cur.selection())
 492                         ;
 493                 else {
 494                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 495                         cur.undispatched();
 496                 }
 497                 break;
 498
 499         case LFUN_CHAR_BACKWARD_SELECT:
 500         case LFUN_CHAR_BACKWARD:
 501                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 502                 cur.autocorrect() = false;
 503                 cur.clearTargetX();
 504                 cur.macroModeClose();
 505                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 506                         cur.posLeft();
 507                         cur.push(*cur.nextAtom().nucleus());
 508                         cur.inset().idxLast(cur);
 509                 } else if (cur.posLeft() || idxLeft(cur)
 510                         || cur.popLeft() || cur.selection())
 511                         ;
 512                 else {
 513                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 514                         cur.undispatched();
 515                 }
 516                 break;
 517
 518         case LFUN_UP_SELECT:
 519         case LFUN_UP:
 520                 // FIXME Tried to use clearTargetX and macroModeClose, crashed on cur.up()
 521                 if (cur.inMacroMode()) {
 522                         // Make Helge happy
 523                         cur.macroModeClose();
 524                         break;
 525                 }
 526                 cur.selHandle(cmd.action == LFUN_UP_SELECT);
 527                 if (!cur.up()) {
 528                         cmd = FuncRequest(LFUN_FINISHED_UP);
 529                         cur.undispatched();
 530                 }
 531                 // fixes bug 1598. Please check!
 532                 cur.normalize();
 533                 break;
 534
 535         case LFUN_DOWN_SELECT:
 536         case LFUN_DOWN:
 537                 if (cur.inMacroMode()) {
 538                         cur.macroModeClose();
 539                         break;
 540                 }
 541                 cur.selHandle(cmd.action == LFUN_DOWN_SELECT);
 542                 if (!cur.down()) {
 543                         cmd = FuncRequest(LFUN_FINISHED_DOWN);
 544                         cur.undispatched();
 545                 }
 546                 // fixes bug 1598. Please check!
 547                 cur.normalize();
 548                 break;
 549
 550         case LFUN_MOUSE_DOUBLE:
 551         case LFUN_MOUSE_TRIPLE:
 552         case LFUN_WORD_SELECT:
 553                 cur.pos() = 0;
 554                 cur.idx() = 0;
 555                 cur.resetAnchor();
 556                 cur.selection() = true;
 557                 cur.pos() = cur.lastpos();
 558                 cur.idx() = cur.lastidx();
 559                 break;
 560
 561         case LFUN_PARAGRAPH_UP_SELECT:
 562         case LFUN_PARAGRAPH_UP:
 563         case LFUN_PARAGRAPH_DOWN_SELECT:
 564         case LFUN_PARAGRAPH_DOWN:
 565                 break;
 566
 567         case LFUN_LINE_BEGIN_SELECT:
 568         case LFUN_LINE_BEGIN:
 569         case LFUN_WORD_BACKWARD_SELECT:
 570         case LFUN_WORD_BACKWARD:
 571                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 572                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 573                 cur.macroModeClose();
 574                 if (cur.pos() != 0) {
 575                         cur.pos() = 0;
 576                 } else if (cur.col() != 0) {
 577                         cur.idx() -= cur.col();
 578                         cur.pos() = 0;
 579                 } else if (cur.idx() != 0) {
 580                         cur.idx() = 0;
 581                         cur.pos() = 0;
 582                 } else {
 583                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 584                         cur.undispatched();
 585                 }
 586                 break;
 587
 588         case LFUN_WORD_FORWARD_SELECT:
 589         case LFUN_WORD_FORWARD:
 590         case LFUN_LINE_END_SELECT:
 591         case LFUN_LINE_END:
 592                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 593                                 cmd.action == LFUN_LINE_END_SELECT);
 594                 cur.macroModeClose();
 595                 cur.clearTargetX();
 596                 if (cur.pos() != cur.lastpos()) {
 597                         cur.pos() = cur.lastpos();
 598                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 599                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 600                         cur.pos() = cur.lastpos();
 601                 } else if (cur.idx() != cur.lastidx()) {
 602                         cur.idx() = cur.lastidx();
 603                         cur.pos() = cur.lastpos();
 604                 } else {
 605                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 606                         cur.undispatched();
 607                 }
 608                 break;
 609
 610         case LFUN_SCREEN_UP_SELECT:
 611         case LFUN_SCREEN_UP:
 612                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 613                 cur.undispatched();
 614                 break;
 615
 616         case LFUN_SCREEN_DOWN_SELECT:
 617         case LFUN_SCREEN_DOWN:
 618                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 619                 cur.undispatched();
 620                 break;
 621
 622         case LFUN_CELL_FORWARD:
 623                 cur.inset().idxNext(cur);
 624                 break;
 625
 626         case LFUN_CELL_BACKWARD:
 627                 cur.inset().idxPrev(cur);
 628                 break;
 629
 630         case LFUN_WORD_DELETE_BACKWARD:
 631         case LFUN_CHAR_DELETE_BACKWARD:
 632                 if (cur.pos() == 0)
 633                         // May affect external cell:
 634                         recordUndoInset(cur, Undo::ATOMIC);
 635                 else
 636                         recordUndo(cur, Undo::ATOMIC);
 637                 cur.backspace();
 638                 break;
 639
 640         case LFUN_WORD_DELETE_FORWARD:
 641         case LFUN_CHAR_DELETE_FORWARD:
 642                 if (cur.pos() == cur.lastpos())
 643                         // May affect external cell:
 644                         recordUndoInset(cur, Undo::ATOMIC);
 645                 else
 646                         recordUndo(cur, Undo::ATOMIC);
 647                 cur.erase();
 648                 break;
 649
 650         case LFUN_ESCAPE:
 651                 if (cur.selection())
 652                         cur.clearSelection();
 653                 else  {
 654                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 655                         cur.undispatched();
 656                 }
 657                 break;
 658
 659         case LFUN_INSET_TOGGLE:
 660                 recordUndo(cur);
 661                 lock(!lock());
 662                 cur.popRight();
 663                 break;
 664
 665         case LFUN_SELF_INSERT:
 666                 if (cmd.argument.size() != 1) {
 667                         recordUndo(cur);
 668                         if (!interpret(cur, cmd.argument))
 669                                 cur.insert(cmd.argument);
 670                         break;
 671                 }
 672                 // Don't record undo steps if we are in macro mode and
 673                 // cmd.argument is the next character of the macro name.
 674                 // Otherwise we'll get an invalid cursor if we undo after
 675                 // the macro was finished and the macro is a known command,
 676                 // e.g. sqrt. LCursor::macroModeClose replaces in this case
 677                 // the MathUnknownInset with name "frac" by an empty
 678                 // MathFracInset -> a pos value > 0 is invalid.
 679                 // A side effect is that an undo before the macro is finished
 680                 // undoes the complete macro, not only the last character.
 681                 if (!cur.inMacroMode())
 682                         recordUndo(cur);
 683
 684                 // spacial handling of space. If we insert an inset
 685                 // via macro mode, we want to put the cursor inside it
 686                 // if relevant. Think typing "\frac<space>".
 687                 if (cmd.argument[0] == ' '
 688                     && cur.inMacroMode() && cur.macroName() != "\\"
 689                     && cur.macroModeClose()) {
 690                         MathAtom const atom = cur.prevAtom();
 691                         if (atom->asNestInset() && atom->nargs() > 0) {
 692                                 cur.posLeft();
 693                                 cur.pushLeft(*cur.nextInset());
 694                         }
 695                 } else if (!interpret(cur, cmd.argument[0])) {
 696                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 697                         cur.undispatched();
 698                 }
 699                 break;
 700
 701         //case LFUN_SERVER_GET_XY:
 702         //      sprintf(dispatch_buffer, "%d %d",);
 703         //      break;
 704
 705         case LFUN_SERVER_SET_XY: {
 706                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 707                 int x = 0;
 708                 int y = 0;
 709                 istringstream is(cmd.argument);
 710                 is >> x >> y;
 711                 cur.setScreenPos(x, y);
 712                 break;
 713         }
 714
 715         // Special casing for superscript in case of LyX handling
 716         // dead-keys:
 717         case LFUN_ACCENT_CIRCUMFLEX:
 718                 if (cmd.argument.empty()) {
 719                         // do superscript if LyX handles
 720                         // deadkeys
 721                         recordUndo(cur, Undo::ATOMIC);
 722                         script(cur, true, grabAndEraseSelection(cur));
 723                 }
 724                 break;
 725
 726         case LFUN_ACCENT_UMLAUT:
 727         case LFUN_ACCENT_ACUTE:
 728         case LFUN_ACCENT_GRAVE:
 729         case LFUN_ACCENT_BREVE:
 730         case LFUN_ACCENT_DOT:
 731         case LFUN_ACCENT_MACRON:
 732         case LFUN_ACCENT_CARON:
 733         case LFUN_ACCENT_TILDE:
 734         case LFUN_ACCENT_CEDILLA:
 735         case LFUN_ACCENT_CIRCLE:
 736         case LFUN_ACCENT_UNDERDOT:
 737         case LFUN_ACCENT_TIE:
 738         case LFUN_ACCENT_OGONEK:
 739         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 740                 break;
 741
 742         //  Math fonts
 743         case LFUN_FONT_FREE_APPLY:
 744         case LFUN_FONT_FREE_UPDATE:
 745                 handleFont2(cur, cmd.argument);
 746                 break;
 747
 748         case LFUN_FONT_BOLD:
 749                 if (currentMode() == TEXT_MODE)
 750                         handleFont(cur, cmd.argument, "textbf");
 751                 else
 752                         handleFont(cur, cmd.argument, "mathbf");
 753                 break;
 754         case LFUN_FONT_SANS:
 755                 if (currentMode() == TEXT_MODE)
 756                         handleFont(cur, cmd.argument, "textsf");
 757                 else
 758                         handleFont(cur, cmd.argument, "mathsf");
 759                 break;
 760         case LFUN_FONT_EMPH:
 761                 if (currentMode() == TEXT_MODE)
 762                         handleFont(cur, cmd.argument, "emph");
 763                 else
 764                         handleFont(cur, cmd.argument, "mathcal");
 765                 break;
 766         case LFUN_FONT_ROMAN:
 767                 if (currentMode() == TEXT_MODE)
 768                         handleFont(cur, cmd.argument, "textrm");
 769                 else
 770                         handleFont(cur, cmd.argument, "mathrm");
 771                 break;
 772         case LFUN_FONT_CODE:
 773                 if (currentMode() == TEXT_MODE)
 774                         handleFont(cur, cmd.argument, "texttt");
 775                 else
 776                         handleFont(cur, cmd.argument, "mathtt");
 777                 break;
 778         case LFUN_FONT_FRAK:
 779                 handleFont(cur, cmd.argument, "mathfrak");
 780                 break;
 781         case LFUN_FONT_ITAL:
 782                 if (currentMode() == TEXT_MODE)
 783                         handleFont(cur, cmd.argument, "textit");
 784                 else
 785                         handleFont(cur, cmd.argument, "mathit");
 786                 break;
 787         case LFUN_FONT_NOUN:
 788                 if (currentMode() == TEXT_MODE)
 789                         // FIXME: should be "noun"
 790                         handleFont(cur, cmd.argument, "textsc");
 791                 else
 792                         handleFont(cur, cmd.argument, "mathbb");
 793                 break;
 794         //case LFUN_FONT_FREE_APPLY:
 795                 handleFont(cur, cmd.argument, "textrm");
 796                 break;
 797         case LFUN_FONT_DEFAULT:
 798                 handleFont(cur, cmd.argument, "textnormal");
 799                 break;
 800
 801         case LFUN_MATH_MODE: {
 802 #if 1
 803                 // ignore math-mode on when already in math mode
 804                 if (currentMode() == InsetBase::MATH_MODE && cmd.argument == "on")
 805                         break;
 806                 cur.macroModeClose();
 807                 string const save_selection = grabAndEraseSelection(cur);
 808                 selClearOrDel(cur);
 809                 //cur.plainInsert(MathAtom(new MathMBoxInset(cur.bv())));
 810                 cur.plainInsert(MathAtom(new MathBoxInset("mbox")));
 811                 cur.posLeft();
 812                 cur.pushLeft(*cur.nextInset());
 813                 cur.niceInsert(save_selection);
 814 #else
 815                 if (currentMode() == InsetBase::TEXT_MODE) {
 816                         cur.niceInsert(MathAtom(new MathHullInset("simple")));
 817                         cur.message(_("create new math text environment ($...$)"));
 818                 } else {
 819                         handleFont(cur, cmd.argument, "textrm");
 820                         cur.message(_("entered math text mode (textrm)"));
 821                 }
 822 #endif
 823                 break;
 824         }
 825
 826         case LFUN_MATH_SIZE:
 827 #if 0
 828                 recordUndo(cur);
 829                 cur.setSize(arg);
 830 #endif
 831                 break;
 832
 833         case LFUN_MATH_MATRIX: {
 834                 recordUndo(cur, Undo::ATOMIC);
 835                 unsigned int m = 1;
 836                 unsigned int n = 1;
 837                 string v_align;
 838                 string h_align;
 839                 istringstream is(cmd.argument);
 840                 is >> m >> n >> v_align >> h_align;
 841                 if (m < 1)
 842                         m = 1;
 843                 if (n < 1)
 844                         n = 1;
 845                 v_align += 'c';
 846                 cur.niceInsert(
 847                         MathAtom(new MathArrayInset("array", m, n, v_align[0], h_align)));
 848                 break;
 849         }
 850
 851         case LFUN_MATH_DELIM: {
 852                 string ls;
 853                 string rs = lyx::support::split(cmd.argument, ls, ' ');
 854                 // Reasonable default values
 855                 if (ls.empty())
 856                         ls = '(';
 857                 if (rs.empty())
 858                         rs = ')';
 859                 recordUndo(cur, Undo::ATOMIC);
 860                 cur.handleNest(MathAtom(new MathDelimInset(ls, rs)));
 861                 break;
 862         }
 863
 864         case LFUN_MATH_BIGDELIM: {
 865                 string const lname = cmd.getArg(0);
 866                 string const ldelim = cmd.getArg(1);
 867                 string const rname = cmd.getArg(2);
 868                 string const rdelim = cmd.getArg(3);
 869                 latexkeys const * l = in_word_set(lname);
 870                 bool const have_l = l && l->inset == "big" &&
 871                                     MathBigInset::isBigInsetDelim(ldelim);
 872                 l = in_word_set(rname);
 873                 bool const have_r = l && l->inset == "big" &&
 874                                     MathBigInset::isBigInsetDelim(rdelim);
 875                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 876                 // or right delimiter.
 877                 if (have_l || have_r) {
 878                         recordUndo(cur, Undo::ATOMIC);
 879                         string const selection = grabAndEraseSelection(cur);
 880                         selClearOrDel(cur);
 881                         if (have_l)
 882                                 cur.insert(MathAtom(new MathBigInset(lname,
 883                                                                 ldelim)));
 884                         cur.niceInsert(selection);
 885                         if (have_r)
 886                                 cur.insert(MathAtom(new MathBigInset(rname,
 887                                                                 rdelim)));
 888                 }
 889                 // Don't call cur.undispatched() if we did nothing, this would
 890                 // lead to infinite recursion via LyXText::dispatch().
 891                 break;
 892         }
 893
 894         case LFUN_SPACE_INSERT:
 895         case LFUN_MATH_SPACE:
 896                 recordUndo(cur, Undo::ATOMIC);
 897                 cur.insert(MathAtom(new MathSpaceInset(",")));
 898                 break;
 899
 900         case LFUN_ERT_INSERT:
 901                 // interpret this as if a backslash was typed
 902                 recordUndo(cur, Undo::ATOMIC);
 903                 interpret(cur, '\\');
 904                 break;
 905
 906         case LFUN_MATH_SUBSCRIPT:
 907                 // interpret this as if a _ was typed
 908                 recordUndo(cur, Undo::ATOMIC);
 909                 interpret(cur, '_');
 910                 break;
 911
 912         case LFUN_MATH_SUPERSCRIPT:
 913                 // interpret this as if a ^ was typed
 914                 recordUndo(cur, Undo::ATOMIC);
 915                 interpret(cur, '^');
 916                 break;
 917
 918 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 919 // handling such that "self-insert" works on "arbitrary stuff" too, and
 920 // math-insert only handles special math things like "matrix".
 921         case LFUN_MATH_INSERT: {
 922                 recordUndo(cur, Undo::ATOMIC);
 923                 if (cmd.argument == "^" || cmd.argument == "_") {
 924                         interpret(cur, cmd.argument[0]);
 925                 } else
 926                         cur.niceInsert(cmd.argument);
 927                 break;
 928                 }
 929
 930         case LFUN_DIALOG_SHOW_NEW_INSET: {
 931                 string const & name = cmd.argument;
 932                 string data;
 933                 if (name == "ref") {
 934                         RefInset tmp(name);
 935                         data = tmp.createDialogStr(name);
 936                 }
 937                 cur.bv().owner()->getDialogs().show(name, data, 0);
 938                 break;
 939         }
 940
 941         default:
 942                 MathDimInset::doDispatch(cur, cmd);
 943                 break;
 944         }
 945 }
 946
 947
 948 bool MathNestInset::getStatus(LCursor & cur, FuncRequest const & cmd,
 949                 FuncStatus & flag) const
 950 {
 951         // the font related toggles
 952         //string tc = "mathnormal";
 953         bool ret = true;
 954         string const arg = cmd.argument;
 955         switch (cmd.action) {
 956         case LFUN_TABULAR_FEATURE:
 957                 flag.enabled(false);
 958                 break;
 959 #if 0
 960         case LFUN_TABULAR_FEATURE:
 961                 // FIXME: check temporarily disabled
 962                 // valign code
 963                 char align = mathcursor::valign();
 964                 if (align == '\0') {
 965                         enable = false;
 966                         break;
 967                 }
 968                 if (cmd.argument.empty()) {
 969                         flag.clear();
 970                         break;
 971                 }
 972                 if (!contains("tcb", cmd.argument[0])) {
 973                         enable = false;
 974                         break;
 975                 }
 976                 flag.setOnOff(cmd.argument[0] == align);
 977                 break;
 978 #endif
 979         /// We have to handle them since 1.4 blocks all unhandled actions
 980         case LFUN_FONT_ITAL:
 981         case LFUN_FONT_BOLD:
 982         case LFUN_FONT_SANS:
 983         case LFUN_FONT_EMPH:
 984         case LFUN_FONT_CODE:
 985         case LFUN_FONT_NOUN:
 986         case LFUN_FONT_ROMAN:
 987         case LFUN_FONT_DEFAULT:
 988                 flag.enabled(true);
 989                 break;
 990         case LFUN_MATH_MUTATE:
 991                 //flag.setOnOff(mathcursor::formula()->hullType() == cmd.argument);
 992                 flag.setOnOff(false);
 993                 break;
 994
 995         // we just need to be in math mode to enable that
 996         case LFUN_MATH_SIZE:
 997         case LFUN_MATH_SPACE:
 998         case LFUN_MATH_LIMITS:
 999         case LFUN_MATH_NONUMBER:
1000         case LFUN_MATH_NUMBER:
1001         case LFUN_MATH_EXTERN:
1002                 flag.enabled(true);
1003                 break;
1004
1005         case LFUN_FONT_FRAK:
1006                 flag.enabled(currentMode() != TEXT_MODE);
1007                 break;
1008
1009         case LFUN_MATH_INSERT: {
1010                 bool const textarg =
1011                         arg == "\\textbf"   || arg == "\\textsf" ||
1012                         arg == "\\textrm"   || arg == "\\textmd" ||
1013                         arg == "\\textit"   || arg == "\\textsc" ||
1014                         arg == "\\textsl"   || arg == "\\textup" ||
1015                         arg == "\\texttt"   || arg == "\\textbb" ||
1016                         arg == "\\textnormal";
1017                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1018                 break;
1019         }
1020
1021         case LFUN_MATH_MATRIX:
1022                 flag.enabled(currentMode() == MATH_MODE);
1023                 break;
1024
1025         case LFUN_MATH_DELIM:
1026         case LFUN_MATH_BIGDELIM:
1027                 // Don't do this with multi-cell selections
1028                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1029                 break;
1030
1031         default:
1032                 ret = false;
1033                 break;
1034         }
1035         return ret;
1036 }
1037
1038
1039 void MathNestInset::edit(LCursor & cur, bool left)
1040 {
1041         cur.push(*this);
1042         cur.idx() = left ? 0 : cur.lastidx();
1043         cur.pos() = left ? 0 : cur.lastpos();
1044         cur.resetAnchor();
1045         //lyxerr << "MathNestInset::edit, cur:\n" << cur << endl;
1046 }
1047
1048
1049 InsetBase * MathNestInset::editXY(LCursor & cur, int x, int y)
1050 {
1051         int idx_min = 0;
1052         int dist_min = 1000000;
1053         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1054                 int const d = cell(i).dist(x, y);
1055                 if (d < dist_min) {
1056                         dist_min = d;
1057                         idx_min = i;
1058                 }
1059         }
1060         MathArray & ar = cell(idx_min);
1061         cur.push(*this);
1062         cur.idx() = idx_min;
1063         cur.pos() = ar.x2pos(x - ar.xo());
1064         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1065         if (dist_min == 0) {
1066                 // hit inside cell
1067                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1068                         if (ar[i]->covers(x, y))
1069                                 return ar[i].nucleus()->editXY(cur, x, y);
1070         }
1071         return this;
1072 }
1073
1074
1075 void MathNestInset::lfunMousePress(LCursor & cur, FuncRequest & cmd)
1076 {
1077         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1078         BufferView & bv = cur.bv();
1079         if (cmd.button() == mouse_button::button1) {
1080                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1081                 bv.mouseSetCursor(cur);
1082         } else if (cmd.button() == mouse_button::button2) {
1083                 MathArray ar;
1084                 if (cur.selection())
1085                         asArray(bv.cursor().selectionAsString(false), ar);
1086                 else
1087                         asArray(bv.owner()->gui().selection().get(), ar);
1088
1089                 cur.insert(ar);
1090                 bv.mouseSetCursor(cur);
1091         }
1092 }
1093
1094
1095 void MathNestInset::lfunMouseMotion(LCursor & cur, FuncRequest & cmd)
1096 {
1097         // only select with button 1
1098         if (cmd.button() == mouse_button::button1) {
1099                 LCursor & bvcur = cur.bv().cursor();
1100                 if (bvcur.anchor_.hasPart(cur)) {
1101                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1102                         bvcur.setCursor(cur);
1103                         bvcur.selection() = true;
1104                         //lyxerr << "MOTION " << bvcur << endl;
1105                 }
1106                 else {
1107                         cur.undispatched();
1108                 }
1109         }
1110 }
1111
1112
1113 void MathNestInset::lfunMouseRelease(LCursor & cur, FuncRequest & cmd)
1114 {
1115         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1116
1117         if (cmd.button() == mouse_button::button1) {
1118                 //cur.bv().owner()->gui().selection().put(cur.grabSelection());
1119                 return;
1120         }
1121
1122         if (cmd.button() == mouse_button::button3) {
1123                 // try to dispatch to enclosed insets first
1124                 cur.bv().owner()->getDialogs().show("mathpanel");
1125                 return;
1126         }
1127
1128         cur.undispatched();
1129 }
1130
1131
1132 bool MathNestInset::interpret(LCursor & cur, char c)
1133 {
1134         //lyxerr << "interpret 2: '" << c << "'" << endl;
1135         string save_selection;
1136         if (c == '^' || c == '_')
1137                 save_selection = grabAndEraseSelection(cur);
1138
1139         cur.clearTargetX();
1140
1141         // handle macroMode
1142         if (cur.inMacroMode()) {
1143                 string name = cur.macroName();
1144
1145                 /// are we currently typing '#1' or '#2' or...?
1146                 if (name == "\\#") {
1147                         cur.backspace();
1148                         int n = c - '0';
1149                         if (n >= 1 && n <= 9)
1150                                 cur.insert(new MathMacroArgument(n));
1151                         return true;
1152                 }
1153
1154                 if (isalpha(c)) {
1155                         cur.activeMacro()->setName(name + c);
1156                         return true;
1157                 }
1158
1159                 // handle 'special char' macros
1160                 if (name == "\\") {
1161                         // remove the '\\'
1162                         if (c == '\\') {
1163                                 cur.backspace();
1164                                 if (currentMode() == MathInset::TEXT_MODE)
1165                                         cur.niceInsert(createMathInset("textbackslash"));
1166                                 else
1167                                         cur.niceInsert(createMathInset("backslash"));
1168                         } else if (c == '{') {
1169                                 cur.backspace();
1170                                 cur.niceInsert(MathAtom(new MathBraceInset));
1171                         } else if (c == '%') {
1172                                 cur.backspace();
1173                                 cur.niceInsert(MathAtom(new MathCommentInset));
1174                         } else if (c == '#') {
1175                                 BOOST_ASSERT(cur.activeMacro());
1176                                 cur.activeMacro()->setName(name + c);
1177                         } else {
1178                                 cur.backspace();
1179                                 cur.niceInsert(createMathInset(string(1, c)));
1180                         }
1181                         return true;
1182                 }
1183
1184                 // One character big delimiters. The others are handled in
1185                 // the other interpret() method.
1186                 latexkeys const * l = in_word_set(name.substr(1));
1187                 if (name[0] == '\\' && l && l->inset == "big") {
1188                         string delim;
1189                         switch (c) {
1190                         case '{':
1191                                 delim = "\\{";
1192                                 break;
1193                         case '}':
1194                                 delim = "\\}";
1195                                 break;
1196                         default:
1197                                 delim = string(1, c);
1198                                 break;
1199                         }
1200                         if (MathBigInset::isBigInsetDelim(delim)) {
1201                                 // name + delim ared a valid MathBigInset.
1202                                 // We can't use cur.macroModeClose() because
1203                                 // it does not handle delim.
1204                                 MathUnknownInset * p = cur.activeMacro();
1205                                 p->finalize();
1206                                 --cur.pos();
1207                                 cur.cell().erase(cur.pos());
1208                                 cur.plainInsert(MathAtom(
1209                                         new MathBigInset(name.substr(1), delim)));
1210                                 return true;
1211                         }
1212                 }
1213
1214                 // leave macro mode and try again if necessary
1215                 cur.macroModeClose();
1216                 if (c == '{')
1217                         cur.niceInsert(MathAtom(new MathBraceInset));
1218                 else if (c != ' ')
1219                         interpret(cur, c);
1220                 return true;
1221         }
1222
1223         // This is annoying as one has to press <space> far too often.
1224         // Disable it.
1225
1226 #if 0
1227                 // leave autocorrect mode if necessary
1228                 if (autocorrect() && c == ' ') {
1229                         autocorrect() = false;
1230                         return true;
1231                 }
1232 #endif
1233
1234         // just clear selection on pressing the space bar
1235         if (cur.selection() && c == ' ') {
1236                 cur.selection() = false;
1237                 return true;
1238         }
1239
1240         selClearOrDel(cur);
1241
1242         if (c == '\\') {
1243                 //lyxerr << "starting with macro" << endl;
1244                 cur.insert(MathAtom(new MathUnknownInset("\\", false)));
1245                 return true;
1246         }
1247
1248         if (c == '\n') {
1249                 if (currentMode() == MathInset::TEXT_MODE)
1250                         cur.insert(c);
1251                 return true;
1252         }
1253
1254         if (c == ' ') {
1255                 if (currentMode() == MathInset::TEXT_MODE) {
1256                         // insert spaces in text mode,
1257                         // but suppress direct insertion of two spaces in a row
1258                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1259                         // it is better than nothing...
1260                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ')
1261                                 cur.insert(c);
1262                         return true;
1263                 }
1264                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1265                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1266                         return true;
1267                 }
1268                 if (cur.popRight())
1269                         return true;
1270                 // if are at the very end, leave the formula
1271                 return cur.pos() != cur.lastpos();
1272         }
1273
1274         // These shouldn't work in text mode:
1275         if (currentMode() != MathInset::TEXT_MODE) {
1276                 if (c == '_') {
1277                         script(cur, false, save_selection);
1278                         return true;
1279                 }
1280                 if (c == '^') {
1281                         script(cur, true, save_selection);
1282                         return true;
1283                 }
1284                 if (c == '~') {
1285                         cur.niceInsert(createMathInset("sim"));
1286                         return true;
1287                 }
1288         }
1289
1290         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1291             c == '%' || c == '_' || c == '^') {
1292                 cur.niceInsert(createMathInset(string(1, c)));
1293                 return true;
1294         }
1295
1296
1297         // try auto-correction
1298         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1299         //      return true;
1300
1301         // no special circumstances, so insert the character without any fuss
1302         cur.insert(c);
1303         cur.autocorrect() = true;
1304         return true;
1305 }
1306
1307
1308 bool MathNestInset::interpret(LCursor & cur, string const & str)
1309 {
1310         // Create a MathBigInset from cur.cell()[cur.pos() - 1] and t if
1311         // possible
1312         if (!cur.empty() && cur.pos() > 0 &&
1313             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1314                 if (MathBigInset::isBigInsetDelim(str)) {
1315                         string prev = asString(cur.cell()[cur.pos() - 1]);
1316                         if (prev[0] == '\\') {
1317                                 prev = prev.substr(1);
1318                                 latexkeys const * l = in_word_set(prev);
1319                                 if (l && l->inset == "big") {
1320                                         cur.cell()[cur.pos() - 1] =
1321                                                 MathAtom(new MathBigInset(prev, str));
1322                                         return true;
1323                                 }
1324                         }
1325                 }
1326         }
1327         return false;
1328 }
1329
1330
1331 bool MathNestInset::script(LCursor & cur, bool up, string const &
1332                 save_selection)
1333 {
1334         // Hack to get \^ and \_ working
1335         //lyxerr << "handling script: up: " << up << endl;
1336         if (cur.inMacroMode() && cur.macroName() == "\\") {
1337                 if (up)
1338                         cur.niceInsert(createMathInset("mathcircumflex"));
1339                 else
1340                         interpret(cur, '_');
1341                 return true;
1342         }
1343
1344         cur.macroModeClose();
1345         if (asScriptInset() && cur.idx() == 0) {
1346                 // we are in a nucleus of a script inset, move to _our_ script
1347                 MathScriptInset * inset = asScriptInset();
1348                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1349                 inset->ensure(up);
1350                 cur.idx() = inset->idxOfScript(up);
1351                 cur.pos() = 0;
1352         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1353                 --cur.pos();
1354                 MathScriptInset * inset = cur.nextAtom().nucleus()->asScriptInset();
1355                 cur.push(*inset);
1356                 inset->ensure(up);
1357                 cur.idx() = inset->idxOfScript(up);
1358                 cur.pos() = cur.lastpos();
1359         } else {
1360                 // convert the thing to our left to a scriptinset or create a new
1361                 // one if in the very first position of the array
1362                 if (cur.pos() == 0) {
1363                         //lyxerr << "new scriptinset" << endl;
1364                         cur.insert(new MathScriptInset(up));
1365                 } else {
1366                         //lyxerr << "converting prev atom " << endl;
1367                         cur.prevAtom() = MathAtom(new MathScriptInset(cur.prevAtom(), up));
1368                 }
1369                 --cur.pos();
1370                 MathScriptInset * inset = cur.nextAtom().nucleus()->asScriptInset();
1371                 // special handling of {}-bases
1372                 // is this always correct?
1373                 if (inset->nuc().size() == 1
1374                     && inset->nuc().back()->asBraceInset())
1375                         inset->nuc() = inset->nuc().back()->asNestInset()->cell(0);
1376
1377                 cur.push(*inset);
1378                 cur.idx() = 1;
1379                 cur.pos() = 0;
1380         }
1381         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1382         cur.niceInsert(save_selection);
1383         cur.resetAnchor();
1384         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1385         return true;
1386 }