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