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 void 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 }
 383
 384
 385 void MathNestInset::handleFont
 386         (LCursor & cur, string const & arg, string const & font)
 387 {
 388         // this whole function is a hack and won't work for incremental font
 389         // changes...
 390         recordUndo(cur, Undo::ATOMIC);
 391
 392         if (cur.inset().asMathInset()->name() == font)
 393                 cur.handleFont(font);
 394         else {
 395                 cur.handleNest(createMathInset(font));
 396                 cur.insert(arg);
 397         }
 398 }
 399
 400
 401 void MathNestInset::handleFont2(LCursor & cur, string const & arg)
 402 {
 403         recordUndo(cur, Undo::ATOMIC);
 404         LyXFont font;
 405         bool b;
 406         bv_funcs::string2font(arg, font, b);
 407         if (font.color() != LColor::inherit) {
 408                 MathAtom at = MathAtom(new MathColorInset(true, font.color()));
 409                 cur.handleNest(at, 0);
 410         }
 411 }
 412
 413
 414 void MathNestInset::doDispatch(LCursor & cur, FuncRequest & cmd)
 415 {
 416         //lyxerr << "MathNestInset: request: " << cmd << std::endl;
 417         //CursorSlice sl = cur.current();
 418
 419         switch (cmd.action) {
 420
 421         case LFUN_PASTE: {
 422                 recordUndo(cur);
 423                 cur.message(_("Paste"));
 424                 replaceSelection(cur);
 425                 size_t n = 0;
 426                 istringstream is(cmd.argument);
 427                 is >> n;
 428                 string const selection = lyx::cap::getSelection(cur.buffer(), n);
 429                 cur.niceInsert(selection);
 430                 cur.clearSelection(); // bug 393
 431                 cur.bv().switchKeyMap();
 432                 finishUndo();
 433                 break;
 434         }
 435
 436         case LFUN_CUT:
 437                 recordUndo(cur);
 438                 cutSelection(cur, true, true);
 439                 cur.message(_("Cut"));
 440                 // Prevent stale position >= size crash
 441                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 442                 cur.normalize();
 443                 break;
 444
 445         case LFUN_COPY:
 446                 copySelection(cur);
 447                 cur.message(_("Copy"));
 448                 break;
 449
 450         case LFUN_MOUSE_PRESS:
 451                 lfunMousePress(cur, cmd);
 452                 break;
 453
 454         case LFUN_MOUSE_MOTION:
 455                 lfunMouseMotion(cur, cmd);
 456                 break;
 457
 458         case LFUN_MOUSE_RELEASE:
 459                 lfunMouseRelease(cur, cmd);
 460                 break;
 461
 462         case LFUN_FINISHED_LEFT:
 463                 cur.bv().cursor() = cur;
 464                 break;
 465
 466         case LFUN_FINISHED_RIGHT:
 467                 ++cur.pos();
 468                 cur.bv().cursor() = cur;
 469                 break;
 470
 471         case LFUN_FINISHED_UP:
 472                 cur.bv().cursor() = cur;
 473                 break;
 474
 475         case LFUN_FINISHED_DOWN:
 476                 ++cur.pos();
 477                 cur.bv().cursor() = cur;
 478                 break;
 479
 480         case LFUN_CHAR_FORWARD_SELECT:
 481         case LFUN_CHAR_FORWARD:
 482                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 483                 cur.autocorrect() = false;
 484                 cur.clearTargetX();
 485                 cur.macroModeClose();
 486                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 487                         cur.pushLeft(*cur.nextAtom().nucleus());
 488                         cur.inset().idxFirst(cur);
 489                 } else if (cur.posRight() || idxRight(cur)
 490                         || cur.popRight() || cur.selection())
 491                         ;
 492                 else {
 493                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 494                         cur.undispatched();
 495                 }
 496                 break;
 497
 498         case LFUN_CHAR_BACKWARD_SELECT:
 499         case LFUN_CHAR_BACKWARD:
 500                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 501                 cur.autocorrect() = false;
 502                 cur.clearTargetX();
 503                 cur.macroModeClose();
 504                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 505                         cur.posLeft();
 506                         cur.push(*cur.nextAtom().nucleus());
 507                         cur.inset().idxLast(cur);
 508                 } else if (cur.posLeft() || idxLeft(cur)
 509                         || cur.popLeft() || cur.selection())
 510                         ;
 511                 else {
 512                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 513                         cur.undispatched();
 514                 }
 515                 break;
 516
 517         case LFUN_UP_SELECT:
 518         case LFUN_UP:
 519                 // FIXME Tried to use clearTargetX and macroModeClose, crashed on cur.up()
 520                 if (cur.inMacroMode()) {
 521                         // Make Helge happy
 522                         cur.macroModeClose();
 523                         break;
 524                 }
 525                 cur.selHandle(cmd.action == LFUN_UP_SELECT);
 526                 if (!cur.up()) {
 527                         cmd = FuncRequest(LFUN_FINISHED_UP);
 528                         cur.undispatched();
 529                 }
 530                 // fixes bug 1598. Please check!
 531                 cur.normalize();
 532                 break;
 533
 534         case LFUN_DOWN_SELECT:
 535         case LFUN_DOWN:
 536                 if (cur.inMacroMode()) {
 537                         cur.macroModeClose();
 538                         break;
 539                 }
 540                 cur.selHandle(cmd.action == LFUN_DOWN_SELECT);
 541                 if (!cur.down()) {
 542                         cmd = FuncRequest(LFUN_FINISHED_DOWN);
 543                         cur.undispatched();
 544                 }
 545                 // fixes bug 1598. Please check!
 546                 cur.normalize();
 547                 break;
 548
 549         case LFUN_MOUSE_DOUBLE:
 550         case LFUN_MOUSE_TRIPLE:
 551         case LFUN_WORD_SELECT:
 552                 cur.pos() = 0;
 553                 cur.idx() = 0;
 554                 cur.resetAnchor();
 555                 cur.selection() = true;
 556                 cur.pos() = cur.lastpos();
 557                 cur.idx() = cur.lastidx();
 558                 break;
 559
 560         case LFUN_PARAGRAPH_UP_SELECT:
 561         case LFUN_PARAGRAPH_UP:
 562         case LFUN_PARAGRAPH_DOWN_SELECT:
 563         case LFUN_PARAGRAPH_DOWN:
 564                 break;
 565
 566         case LFUN_LINE_BEGIN_SELECT:
 567         case LFUN_LINE_BEGIN:
 568         case LFUN_WORD_BACKWARD_SELECT:
 569         case LFUN_WORD_BACKWARD:
 570                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 571                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 572                 cur.macroModeClose();
 573                 if (cur.pos() != 0) {
 574                         cur.pos() = 0;
 575                 } else if (cur.col() != 0) {
 576                         cur.idx() -= cur.col();
 577                         cur.pos() = 0;
 578                 } else if (cur.idx() != 0) {
 579                         cur.idx() = 0;
 580                         cur.pos() = 0;
 581                 } else {
 582                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 583                         cur.undispatched();
 584                 }
 585                 break;
 586
 587         case LFUN_WORD_FORWARD_SELECT:
 588         case LFUN_WORD_FORWARD:
 589         case LFUN_LINE_END_SELECT:
 590         case LFUN_LINE_END:
 591                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 592                                 cmd.action == LFUN_LINE_END_SELECT);
 593                 cur.macroModeClose();
 594                 cur.clearTargetX();
 595                 if (cur.pos() != cur.lastpos()) {
 596                         cur.pos() = cur.lastpos();
 597                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 598                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 599                         cur.pos() = cur.lastpos();
 600                 } else if (cur.idx() != cur.lastidx()) {
 601                         cur.idx() = cur.lastidx();
 602                         cur.pos() = cur.lastpos();
 603                 } else {
 604                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 605                         cur.undispatched();
 606                 }
 607                 break;
 608
 609         case LFUN_SCREEN_UP_SELECT:
 610         case LFUN_SCREEN_UP:
 611                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 612                 cur.undispatched();
 613                 break;
 614
 615         case LFUN_SCREEN_DOWN_SELECT:
 616         case LFUN_SCREEN_DOWN:
 617                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 618                 cur.undispatched();
 619                 break;
 620
 621         case LFUN_CELL_FORWARD:
 622                 cur.inset().idxNext(cur);
 623                 break;
 624
 625         case LFUN_CELL_BACKWARD:
 626                 cur.inset().idxPrev(cur);
 627                 break;
 628
 629         case LFUN_WORD_DELETE_BACKWARD:
 630         case LFUN_CHAR_DELETE_BACKWARD:
 631                 if (cur.pos() == 0)
 632                         // May affect external cell:
 633                         recordUndoInset(cur, Undo::ATOMIC);
 634                 else
 635                         recordUndo(cur, Undo::ATOMIC);
 636                 cur.backspace();
 637                 break;
 638
 639         case LFUN_WORD_DELETE_FORWARD:
 640         case LFUN_CHAR_DELETE_FORWARD:
 641                 if (cur.pos() == cur.lastpos())
 642                         // May affect external cell:
 643                         recordUndoInset(cur, Undo::ATOMIC);
 644                 else
 645                         recordUndo(cur, Undo::ATOMIC);
 646                 cur.erase();
 647                 break;
 648
 649         case LFUN_ESCAPE:
 650                 if (cur.selection())
 651                         cur.clearSelection();
 652                 else  {
 653                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 654                         cur.undispatched();
 655                 }
 656                 break;
 657
 658         case LFUN_INSET_TOGGLE:
 659                 recordUndo(cur);
 660                 lock(!lock());
 661                 cur.popRight();
 662                 break;
 663
 664         case LFUN_SELF_INSERT:
 665                 if (cmd.argument.size() != 1) {
 666                         recordUndo(cur);
 667                         if (!interpret(cur, cmd.argument))
 668                                 cur.insert(cmd.argument);
 669                         break;
 670                 }
 671                 // Don't record undo steps if we are in macro mode and
 672                 // cmd.argument is the next character of the macro name.
 673                 // Otherwise we'll get an invalid cursor if we undo after
 674                 // the macro was finished and the macro is a known command,
 675                 // e.g. sqrt. LCursor::macroModeClose replaces in this case
 676                 // the MathUnknownInset with name "frac" by an empty
 677                 // MathFracInset -> a pos value > 0 is invalid.
 678                 // A side effect is that an undo before the macro is finished
 679                 // undoes the complete macro, not only the last character.
 680                 if (!cur.inMacroMode())
 681                         recordUndo(cur);
 682
 683                 // spacial handling of space. If we insert an inset
 684                 // via macro mode, we want to put the cursor inside it
 685                 // if relevant. Think typing "\frac<space>".
 686                 if (cmd.argument[0] == ' '
 687                     && cur.inMacroMode() && cur.macroName() != "\\"
 688                     && cur.macroModeClose()) {
 689                         MathAtom const atom = cur.prevAtom();
 690                         if (atom->asNestInset() && atom->nargs() > 0) {
 691                                 cur.posLeft();
 692                                 cur.pushLeft(*cur.nextInset());
 693                         }
 694                 } else if (!interpret(cur, cmd.argument[0])) {
 695                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 696                         cur.undispatched();
 697                 }
 698                 break;
 699
 700         //case LFUN_SERVER_GET_XY:
 701         //      sprintf(dispatch_buffer, "%d %d",);
 702         //      break;
 703
 704         case LFUN_SERVER_SET_XY: {
 705                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 706                 int x = 0;
 707                 int y = 0;
 708                 istringstream is(cmd.argument);
 709                 is >> x >> y;
 710                 cur.setScreenPos(x, y);
 711                 break;
 712         }
 713
 714         // Special casing for superscript in case of LyX handling
 715         // dead-keys:
 716         case LFUN_ACCENT_CIRCUMFLEX:
 717                 if (cmd.argument.empty()) {
 718                         // do superscript if LyX handles
 719                         // deadkeys
 720                         recordUndo(cur, Undo::ATOMIC);
 721                         script(cur, true, grabAndEraseSelection(cur));
 722                 }
 723                 break;
 724
 725         case LFUN_ACCENT_UMLAUT:
 726         case LFUN_ACCENT_ACUTE:
 727         case LFUN_ACCENT_GRAVE:
 728         case LFUN_ACCENT_BREVE:
 729         case LFUN_ACCENT_DOT:
 730         case LFUN_ACCENT_MACRON:
 731         case LFUN_ACCENT_CARON:
 732         case LFUN_ACCENT_TILDE:
 733         case LFUN_ACCENT_CEDILLA:
 734         case LFUN_ACCENT_CIRCLE:
 735         case LFUN_ACCENT_UNDERDOT:
 736         case LFUN_ACCENT_TIE:
 737         case LFUN_ACCENT_OGONEK:
 738         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 739                 break;
 740
 741         //  Math fonts
 742         case LFUN_FONT_FREE_APPLY:
 743         case LFUN_FONT_FREE_UPDATE:
 744                 handleFont2(cur, cmd.argument);
 745                 break;
 746
 747         case LFUN_FONT_BOLD:
 748                 if (currentMode() == TEXT_MODE)
 749                         handleFont(cur, cmd.argument, "textbf");
 750                 else
 751                         handleFont(cur, cmd.argument, "mathbf");
 752                 break;
 753         case LFUN_FONT_SANS:
 754                 if (currentMode() == TEXT_MODE)
 755                         handleFont(cur, cmd.argument, "textsf");
 756                 else
 757                         handleFont(cur, cmd.argument, "mathsf");
 758                 break;
 759         case LFUN_FONT_EMPH:
 760                 if (currentMode() == TEXT_MODE)
 761                         handleFont(cur, cmd.argument, "emph");
 762                 else
 763                         handleFont(cur, cmd.argument, "mathcal");
 764                 break;
 765         case LFUN_FONT_ROMAN:
 766                 if (currentMode() == TEXT_MODE)
 767                         handleFont(cur, cmd.argument, "textrm");
 768                 else
 769                         handleFont(cur, cmd.argument, "mathrm");
 770                 break;
 771         case LFUN_FONT_CODE:
 772                 if (currentMode() == TEXT_MODE)
 773                         handleFont(cur, cmd.argument, "texttt");
 774                 else
 775                         handleFont(cur, cmd.argument, "mathtt");
 776                 break;
 777         case LFUN_FONT_FRAK:
 778                 handleFont(cur, cmd.argument, "mathfrak");
 779                 break;
 780         case LFUN_FONT_ITAL:
 781                 if (currentMode() == TEXT_MODE)
 782                         handleFont(cur, cmd.argument, "textit");
 783                 else
 784                         handleFont(cur, cmd.argument, "mathit");
 785                 break;
 786         case LFUN_FONT_NOUN:
 787                 if (currentMode() == TEXT_MODE)
 788                         // FIXME: should be "noun"
 789                         handleFont(cur, cmd.argument, "textsc");
 790                 else
 791                         handleFont(cur, cmd.argument, "mathbb");
 792                 break;
 793         //case LFUN_FONT_FREE_APPLY:
 794                 handleFont(cur, cmd.argument, "textrm");
 795                 break;
 796         case LFUN_FONT_DEFAULT:
 797                 handleFont(cur, cmd.argument, "textnormal");
 798                 break;
 799
 800         case LFUN_MATH_MODE: {
 801 #if 1
 802                 // ignore math-mode on when already in math mode
 803                 if (currentMode() == InsetBase::MATH_MODE && cmd.argument == "on")
 804                         break;
 805                 cur.macroModeClose();
 806                 string const save_selection = grabAndEraseSelection(cur);
 807                 selClearOrDel(cur);
 808                 //cur.plainInsert(MathAtom(new MathMBoxInset(cur.bv())));
 809                 cur.plainInsert(MathAtom(new MathBoxInset("mbox")));
 810                 cur.posLeft();
 811                 cur.pushLeft(*cur.nextInset());
 812                 cur.niceInsert(save_selection);
 813 #else
 814                 if (currentMode() == InsetBase::TEXT_MODE) {
 815                         cur.niceInsert(MathAtom(new MathHullInset("simple")));
 816                         cur.message(_("create new math text environment ($...$)"));
 817                 } else {
 818                         handleFont(cur, cmd.argument, "textrm");
 819                         cur.message(_("entered math text mode (textrm)"));
 820                 }
 821 #endif
 822                 break;
 823         }
 824
 825         case LFUN_MATH_SIZE:
 826 #if 0
 827                 recordUndo(cur);
 828                 cur.setSize(arg);
 829 #endif
 830                 break;
 831
 832         case LFUN_MATH_MATRIX: {
 833                 recordUndo(cur, Undo::ATOMIC);
 834                 unsigned int m = 1;
 835                 unsigned int n = 1;
 836                 string v_align;
 837                 string h_align;
 838                 istringstream is(cmd.argument);
 839                 is >> m >> n >> v_align >> h_align;
 840                 if (m < 1)
 841                         m = 1;
 842                 if (n < 1)
 843                         n = 1;
 844                 v_align += 'c';
 845                 cur.niceInsert(
 846                         MathAtom(new MathArrayInset("array", m, n, v_align[0], h_align)));
 847                 break;
 848         }
 849
 850         case LFUN_MATH_DELIM: {
 851                 string ls;
 852                 string rs = lyx::support::split(cmd.argument, ls, ' ');
 853                 // Reasonable default values
 854                 if (ls.empty())
 855                         ls = '(';
 856                 if (rs.empty())
 857                         rs = ')';
 858                 recordUndo(cur, Undo::ATOMIC);
 859                 cur.handleNest(MathAtom(new MathDelimInset(ls, rs)));
 860                 break;
 861         }
 862
 863         case LFUN_MATH_BIGDELIM: {
 864                 string const lname = cmd.getArg(0);
 865                 string const ldelim = cmd.getArg(1);
 866                 string const rname = cmd.getArg(2);
 867                 string const rdelim = cmd.getArg(3);
 868                 latexkeys const * l = in_word_set(lname);
 869                 bool const have_l = l && l->inset == "big" &&
 870                                     MathBigInset::isBigInsetDelim(ldelim);
 871                 l = in_word_set(rname);
 872                 bool const have_r = l && l->inset == "big" &&
 873                                     MathBigInset::isBigInsetDelim(rdelim);
 874                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 875                 // or right delimiter.
 876                 if (have_l || have_r) {
 877                         recordUndo(cur, Undo::ATOMIC);
 878                         string const selection = grabAndEraseSelection(cur);
 879                         selClearOrDel(cur);
 880                         if (have_l)
 881                                 cur.insert(MathAtom(new MathBigInset(lname,
 882                                                                 ldelim)));
 883                         cur.niceInsert(selection);
 884                         if (have_r)
 885                                 cur.insert(MathAtom(new MathBigInset(rname,
 886                                                                 rdelim)));
 887                 }
 888                 // Don't call cur.undispatched() if we did nothing, this would
 889                 // lead to infinite recursion via LyXText::dispatch().
 890                 break;
 891         }
 892
 893         case LFUN_SPACE_INSERT:
 894         case LFUN_MATH_SPACE:
 895                 recordUndo(cur, Undo::ATOMIC);
 896                 cur.insert(MathAtom(new MathSpaceInset(",")));
 897                 break;
 898
 899         case LFUN_ERT_INSERT:
 900                 // interpret this as if a backslash was typed
 901                 recordUndo(cur, Undo::ATOMIC);
 902                 interpret(cur, '\\');
 903                 break;
 904
 905         case LFUN_MATH_SUBSCRIPT:
 906                 // interpret this as if a _ was typed
 907                 recordUndo(cur, Undo::ATOMIC);
 908                 interpret(cur, '_');
 909                 break;
 910
 911         case LFUN_MATH_SUPERSCRIPT:
 912                 // interpret this as if a ^ was typed
 913                 recordUndo(cur, Undo::ATOMIC);
 914                 interpret(cur, '^');
 915                 break;
 916
 917 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 918 // handling such that "self-insert" works on "arbitrary stuff" too, and
 919 // math-insert only handles special math things like "matrix".
 920         case LFUN_MATH_INSERT: {
 921                 recordUndo(cur, Undo::ATOMIC);
 922                 if (cmd.argument == "^" || cmd.argument == "_") {
 923                         interpret(cur, cmd.argument[0]);
 924                 } else
 925                         cur.niceInsert(cmd.argument);
 926                 break;
 927                 }
 928
 929         case LFUN_DIALOG_SHOW_NEW_INSET: {
 930                 string const & name = cmd.argument;
 931                 string data;
 932                 if (name == "ref") {
 933                         RefInset tmp(name);
 934                         data = tmp.createDialogStr(name);
 935                 }
 936                 cur.bv().owner()->getDialogs().show(name, data, 0);
 937                 break;
 938         }
 939
 940         default:
 941                 MathDimInset::doDispatch(cur, cmd);
 942                 break;
 943         }
 944 }
 945
 946
 947 bool MathNestInset::getStatus(LCursor & cur, FuncRequest const & cmd,
 948                 FuncStatus & flag) const
 949 {
 950         // the font related toggles
 951         //string tc = "mathnormal";
 952         bool ret = true;
 953         string const arg = cmd.argument;
 954         switch (cmd.action) {
 955         case LFUN_TABULAR_FEATURE:
 956                 flag.enabled(false);
 957                 break;
 958 #if 0
 959         case LFUN_TABULAR_FEATURE:
 960                 // FIXME: check temporarily disabled
 961                 // valign code
 962                 char align = mathcursor::valign();
 963                 if (align == '\0') {
 964                         enable = false;
 965                         break;
 966                 }
 967                 if (cmd.argument.empty()) {
 968                         flag.clear();
 969                         break;
 970                 }
 971                 if (!contains("tcb", cmd.argument[0])) {
 972                         enable = false;
 973                         break;
 974                 }
 975                 flag.setOnOff(cmd.argument[0] == align);
 976                 break;
 977 #endif
 978         /// We have to handle them since 1.4 blocks all unhandled actions
 979         case LFUN_FONT_ITAL:
 980         case LFUN_FONT_BOLD:
 981         case LFUN_FONT_SANS:
 982         case LFUN_FONT_EMPH:
 983         case LFUN_FONT_CODE:
 984         case LFUN_FONT_NOUN:
 985         case LFUN_FONT_ROMAN:
 986         case LFUN_FONT_DEFAULT:
 987                 flag.enabled(true);
 988                 break;
 989         case LFUN_MATH_MUTATE:
 990                 //flag.setOnOff(mathcursor::formula()->hullType() == cmd.argument);
 991                 flag.setOnOff(false);
 992                 break;
 993
 994         // we just need to be in math mode to enable that
 995         case LFUN_MATH_SIZE:
 996         case LFUN_MATH_SPACE:
 997         case LFUN_MATH_LIMITS:
 998         case LFUN_MATH_NONUMBER:
 999         case LFUN_MATH_NUMBER:
1000         case LFUN_MATH_EXTERN:
1001                 flag.enabled(true);
1002                 break;
1003
1004         case LFUN_FONT_FRAK:
1005                 flag.enabled(currentMode() != TEXT_MODE);
1006                 break;
1007
1008         case LFUN_MATH_INSERT: {
1009                 bool const textarg =
1010                         arg == "\\textbf"   || arg == "\\textsf" ||
1011                         arg == "\\textrm"   || arg == "\\textmd" ||
1012                         arg == "\\textit"   || arg == "\\textsc" ||
1013                         arg == "\\textsl"   || arg == "\\textup" ||
1014                         arg == "\\texttt"   || arg == "\\textbb" ||
1015                         arg == "\\textnormal";
1016                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1017                 break;
1018         }
1019
1020         case LFUN_MATH_MATRIX:
1021                 flag.enabled(currentMode() == MATH_MODE);
1022                 break;
1023
1024         case LFUN_MATH_DELIM:
1025         case LFUN_MATH_BIGDELIM:
1026                 // Don't do this with multi-cell selections
1027                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1028                 break;
1029
1030         default:
1031                 ret = false;
1032                 break;
1033         }
1034         return ret;
1035 }
1036
1037
1038 void MathNestInset::edit(LCursor & cur, bool left)
1039 {
1040         cur.push(*this);
1041         cur.idx() = left ? 0 : cur.lastidx();
1042         cur.pos() = left ? 0 : cur.lastpos();
1043         cur.resetAnchor();
1044         //lyxerr << "MathNestInset::edit, cur:\n" << cur << endl;
1045 }
1046
1047
1048 InsetBase * MathNestInset::editXY(LCursor & cur, int x, int y)
1049 {
1050         int idx_min = 0;
1051         int dist_min = 1000000;
1052         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1053                 int const d = cell(i).dist(x, y);
1054                 if (d < dist_min) {
1055                         dist_min = d;
1056                         idx_min = i;
1057                 }
1058         }
1059         MathArray & ar = cell(idx_min);
1060         cur.push(*this);
1061         cur.idx() = idx_min;
1062         cur.pos() = ar.x2pos(x - ar.xo());
1063         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1064         if (dist_min == 0) {
1065                 // hit inside cell
1066                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1067                         if (ar[i]->covers(x, y))
1068                                 return ar[i].nucleus()->editXY(cur, x, y);
1069         }
1070         return this;
1071 }
1072
1073
1074 void MathNestInset::lfunMousePress(LCursor & cur, FuncRequest & cmd)
1075 {
1076         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1077         if (cmd.button() == mouse_button::button1) {
1078                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1079                 cur.bv().mouseSetCursor(cur);
1080         }
1081
1082         if (cmd.button() == mouse_button::button2) {
1083                 MathArray ar;
1084                 asArray(cur.bv().owner()->gui().selection().get(), ar);
1085                 cur.clearSelection();
1086                 editXY(cur, cmd.x, cmd.y);
1087                 cur.insert(ar);
1088                 cur.bv().update();
1089                 return;
1090         }
1091 }
1092
1093
1094 void MathNestInset::lfunMouseMotion(LCursor & cur, FuncRequest & cmd)
1095 {
1096         // only select with button 1
1097         if (cmd.button() == mouse_button::button1) {
1098                 LCursor & bvcur = cur.bv().cursor();
1099                 if (bvcur.anchor_.hasPart(cur)) {
1100                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1101                         bvcur.setCursor(cur);
1102                         bvcur.selection() = true;
1103                         //lyxerr << "MOTION " << bvcur << endl;
1104                 }
1105                 else {
1106                         cur.undispatched();
1107                 }
1108         }
1109 }
1110
1111
1112 void MathNestInset::lfunMouseRelease(LCursor & cur, FuncRequest & cmd)
1113 {
1114         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1115
1116         if (cmd.button() == mouse_button::button1) {
1117                 //cur.bv().owner()->gui().selection().put(cur.grabSelection());
1118                 return;
1119         }
1120
1121         if (cmd.button() == mouse_button::button3) {
1122                 // try to dispatch to enclosed insets first
1123                 cur.bv().owner()->getDialogs().show("mathpanel");
1124                 return;
1125         }
1126
1127         cur.undispatched();
1128 }
1129
1130
1131 bool MathNestInset::interpret(LCursor & cur, char c)
1132 {
1133         //lyxerr << "interpret 2: '" << c << "'" << endl;
1134         string save_selection;
1135         if (c == '^' || c == '_')
1136                 save_selection = grabAndEraseSelection(cur);
1137
1138         cur.clearTargetX();
1139
1140         // handle macroMode
1141         if (cur.inMacroMode()) {
1142                 string name = cur.macroName();
1143
1144                 /// are we currently typing '#1' or '#2' or...?
1145                 if (name == "\\#") {
1146                         cur.backspace();
1147                         int n = c - '0';
1148                         if (n >= 1 && n <= 9)
1149                                 cur.insert(new MathMacroArgument(n));
1150                         return true;
1151                 }
1152
1153                 if (isalpha(c)) {
1154                         cur.activeMacro()->setName(name + c);
1155                         return true;
1156                 }
1157
1158                 // handle 'special char' macros
1159                 if (name == "\\") {
1160                         // remove the '\\'
1161                         if (c == '\\') {
1162                                 cur.backspace();
1163                                 if (currentMode() == MathInset::TEXT_MODE)
1164                                         cur.niceInsert(createMathInset("textbackslash"));
1165                                 else
1166                                         cur.niceInsert(createMathInset("backslash"));
1167                         } else if (c == '{') {
1168                                 cur.backspace();
1169                                 cur.niceInsert(MathAtom(new MathBraceInset));
1170                         } else if (c == '%') {
1171                                 cur.backspace();
1172                                 cur.niceInsert(MathAtom(new MathCommentInset));
1173                         } else if (c == '#') {
1174                                 BOOST_ASSERT(cur.activeMacro());
1175                                 cur.activeMacro()->setName(name + c);
1176                         } else {
1177                                 cur.backspace();
1178                                 cur.niceInsert(createMathInset(string(1, c)));
1179                         }
1180                         return true;
1181                 }
1182
1183                 // One character big delimiters. The others are handled in
1184                 // the other interpret() method.
1185                 latexkeys const * l = in_word_set(name.substr(1));
1186                 if (name[0] == '\\' && l && l->inset == "big") {
1187                         string delim;
1188                         switch (c) {
1189                         case '{':
1190                                 delim = "\\{";
1191                                 break;
1192                         case '}':
1193                                 delim = "\\}";
1194                                 break;
1195                         default:
1196                                 delim = string(1, c);
1197                                 break;
1198                         }
1199                         if (MathBigInset::isBigInsetDelim(delim)) {
1200                                 // name + delim ared a valid MathBigInset.
1201                                 // We can't use cur.macroModeClose() because
1202                                 // it does not handle delim.
1203                                 MathUnknownInset * p = cur.activeMacro();
1204                                 p->finalize();
1205                                 --cur.pos();
1206                                 cur.cell().erase(cur.pos());
1207                                 cur.plainInsert(MathAtom(
1208                                         new MathBigInset(name.substr(1), delim)));
1209                                 return true;
1210                         }
1211                 }
1212
1213                 // leave macro mode and try again if necessary
1214                 cur.macroModeClose();
1215                 if (c == '{')
1216                         cur.niceInsert(MathAtom(new MathBraceInset));
1217                 else if (c != ' ')
1218                         interpret(cur, c);
1219                 return true;
1220         }
1221
1222         // This is annoying as one has to press <space> far too often.
1223         // Disable it.
1224
1225 #if 0
1226                 // leave autocorrect mode if necessary
1227                 if (autocorrect() && c == ' ') {
1228                         autocorrect() = false;
1229                         return true;
1230                 }
1231 #endif
1232
1233         // just clear selection on pressing the space bar
1234         if (cur.selection() && c == ' ') {
1235                 cur.selection() = false;
1236                 return true;
1237         }
1238
1239         selClearOrDel(cur);
1240
1241         if (c == '\\') {
1242                 //lyxerr << "starting with macro" << endl;
1243                 cur.insert(MathAtom(new MathUnknownInset("\\", false)));
1244                 return true;
1245         }
1246
1247         if (c == '\n') {
1248                 if (currentMode() == MathInset::TEXT_MODE)
1249                         cur.insert(c);
1250                 return true;
1251         }
1252
1253         if (c == ' ') {
1254                 if (currentMode() == MathInset::TEXT_MODE) {
1255                         // insert spaces in text mode,
1256                         // but suppress direct insertion of two spaces in a row
1257                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1258                         // it is better than nothing...
1259                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ')
1260                                 cur.insert(c);
1261                         return true;
1262                 }
1263                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1264                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1265                         return true;
1266                 }
1267                 if (cur.popRight())
1268                         return true;
1269                 // if are at the very end, leave the formula
1270                 return cur.pos() != cur.lastpos();
1271         }
1272
1273         // These shouldn't work in text mode:
1274         if (currentMode() != MathInset::TEXT_MODE) {
1275                 if (c == '_') {
1276                         script(cur, false, save_selection);
1277                         return true;
1278                 }
1279                 if (c == '^') {
1280                         script(cur, true, save_selection);
1281                         return true;
1282                 }
1283                 if (c == '~') {
1284                         cur.niceInsert(createMathInset("sim"));
1285                         return true;
1286                 }
1287         }
1288
1289         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1290             c == '%' || c == '_' || c == '^') {
1291                 cur.niceInsert(createMathInset(string(1, c)));
1292                 return true;
1293         }
1294
1295
1296         // try auto-correction
1297         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1298         //      return true;
1299
1300         // no special circumstances, so insert the character without any fuss
1301         cur.insert(c);
1302         cur.autocorrect() = true;
1303         return true;
1304 }
1305
1306
1307 bool MathNestInset::interpret(LCursor & cur, string const & str)
1308 {
1309         // Create a MathBigInset from cur.cell()[cur.pos() - 1] and t if
1310         // possible
1311         if (!cur.empty() && cur.pos() > 0 &&
1312             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1313                 if (MathBigInset::isBigInsetDelim(str)) {
1314                         string prev = asString(cur.cell()[cur.pos() - 1]);
1315                         if (prev[0] == '\\') {
1316                                 prev = prev.substr(1);
1317                                 latexkeys const * l = in_word_set(prev);
1318                                 if (l && l->inset == "big") {
1319                                         cur.cell()[cur.pos() - 1] =
1320                                                 MathAtom(new MathBigInset(prev, str));
1321                                         return true;
1322                                 }
1323                         }
1324                 }
1325         }
1326         return false;
1327 }
1328
1329
1330 bool MathNestInset::script(LCursor & cur, bool up, string const &
1331                 save_selection)
1332 {
1333         // Hack to get \^ and \_ working
1334         //lyxerr << "handling script: up: " << up << endl;
1335         if (cur.inMacroMode() && cur.macroName() == "\\") {
1336                 if (up)
1337                         cur.niceInsert(createMathInset("mathcircumflex"));
1338                 else
1339                         interpret(cur, '_');
1340                 return true;
1341         }
1342
1343         cur.macroModeClose();
1344         if (asScriptInset() && cur.idx() == 0) {
1345                 // we are in a nucleus of a script inset, move to _our_ script
1346                 MathScriptInset * inset = asScriptInset();
1347                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1348                 inset->ensure(up);
1349                 cur.idx() = inset->idxOfScript(up);
1350                 cur.pos() = 0;
1351         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1352                 --cur.pos();
1353                 MathScriptInset * inset = cur.nextAtom().nucleus()->asScriptInset();
1354                 cur.push(*inset);
1355                 inset->ensure(up);
1356                 cur.idx() = inset->idxOfScript(up);
1357                 cur.pos() = cur.lastpos();
1358         } else {
1359                 // convert the thing to our left to a scriptinset or create a new
1360                 // one if in the very first position of the array
1361                 if (cur.pos() == 0) {
1362                         //lyxerr << "new scriptinset" << endl;
1363                         cur.insert(new MathScriptInset(up));
1364                 } else {
1365                         //lyxerr << "converting prev atom " << endl;
1366                         cur.prevAtom() = MathAtom(new MathScriptInset(cur.prevAtom(), up));
1367                 }
1368                 --cur.pos();
1369                 MathScriptInset * inset = cur.nextAtom().nucleus()->asScriptInset();
1370                 cur.push(*inset);
1371                 cur.idx() = 1;
1372                 cur.pos() = 0;
1373         }
1374         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1375         cur.niceInsert(save_selection);
1376         cur.resetAnchor();
1377         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1378         return true;
1379 }