src/mathed/InsetMathNest.C

   1 /**
   2  * \file InsetMathNest.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 "InsetMathNest.h"
  14
  15 #include "InsetMathArray.h"
  16 #include "InsetMathBig.h"
  17 #include "InsetMathBox.h"
  18 #include "InsetMathBrace.h"
  19 #include "InsetMathColor.h"
  20 #include "InsetMathComment.h"
  21 #include "MathData.h"
  22 #include "InsetMathDelim.h"
  23 #include "MathFactory.h"
  24 #include "InsetMathHull.h"
  25 #include "MathMLStream.h"
  26 #include "MathMacroArgument.h"
  27 //#include "InsetMathMBox.h"
  28 #include "MathParser.h"
  29 #include "InsetMathScript.h"
  30 #include "InsetMathSpace.h"
  31 #include "InsetMathSymbol.h"
  32 #include "MathSupport.h"
  33 #include "InsetMathUnknown.h"
  34 #include "InsetMathRef.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 "lyxtext.h"
  48 #include "outputparams.h"
  49 #include "undo.h"
  50
  51 #include "support/lstrings.h"
  52
  53 #include "frontends/Painter.h"
  54 #include "frontends/Selection.h"
  55 #include "frontends/nullpainter.h"
  56
  57 #include "funcrequest.h"
  58 #include "lyxserver.h"
  59 #include "lyxsocket.h"
  60
  61 #include <sstream>
  62
  63 using lyx::CoordCache;
  64 using lyx::docstring;
  65 using lyx::Point;
  66
  67 using lyx::cap::copySelection;
  68 using lyx::cap::grabAndEraseSelection;
  69 using lyx::cap::cutSelection;
  70 using lyx::cap::replaceSelection;
  71 using lyx::cap::selClearOrDel;
  72
  73 using std::endl;
  74 using std::string;
  75 using std::istringstream;
  76
  77
  78 InsetMathNest::InsetMathNest(idx_type nargs)
  79         : cells_(nargs), lock_(false)
  80 {}
  81
  82
  83 InsetMath::idx_type InsetMathNest::nargs() const
  84 {
  85         return cells_.size();
  86 }
  87
  88
  89 MathArray & InsetMathNest::cell(idx_type i)
  90 {
  91         return cells_[i];
  92 }
  93
  94
  95 MathArray const & InsetMathNest::cell(idx_type i) const
  96 {
  97         return cells_[i];
  98 }
  99
 100
 101 void InsetMathNest::cursorPos(CursorSlice const & sl, bool /*boundary*/,
 102         int & x, int & y) const
 103 {
 104 // FIXME: This is a hack. Ideally, the coord cache should not store
 105 // absolute positions, but relative ones. This would mean to call
 106 // setXY() not in MathArray::draw(), but in the parent insets' draw()
 107 // with the correctly adjusted x,y values. But this means that we'd have
 108 // to touch all (math)inset's draw() methods. Right now, we'll store
 109 // absolute value, and make them here relative, only to make them
 110 // absolute again when actually drawing the cursor. What a mess.
 111         BOOST_ASSERT(ptr_cmp(&sl.inset(), this));
 112         MathArray const & ar = sl.cell();
 113         CoordCache & coord_cache = sl.text()->bv()->coordCache();
 114         if (!coord_cache.getArrays().has(&ar)) {
 115                 // this can (semi-)legally happen if we just created this cell
 116                 // and it never has been drawn before. So don't ASSERT.
 117                 //lyxerr << "no cached data for array " << &ar << endl;
 118                 x = 0;
 119                 y = 0;
 120                 return;
 121         }
 122         Point const pt = coord_cache.getArrays().xy(&ar);
 123         if (!coord_cache.getInsets().has(this)) {
 124                 // same as above
 125                 //lyxerr << "no cached data for inset " << this << endl;
 126                 x = 0;
 127                 y = 0;
 128                 return;
 129         }
 130         Point const pt2 = coord_cache.getInsets().xy(this);
 131         //lyxerr << "retrieving position cache for MathArray "
 132         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 133         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 134         y = pt.y_ - pt2.y_;
 135 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 136 //              << " asc: " << ascent() << "  des: " << descent()
 137 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 138         // move cursor visually into empty cells ("blue rectangles");
 139         if (ar.empty())
 140                 x += 2;
 141 }
 142
 143
 144 void InsetMathNest::metrics(MetricsInfo const & mi) const
 145 {
 146         MetricsInfo m = mi;
 147         for (idx_type i = 0, n = nargs(); i != n; ++i)
 148                 cell(i).metrics(m);
 149 }
 150
 151
 152 bool InsetMathNest::idxNext(LCursor & cur) const
 153 {
 154         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 155         if (cur.idx() == cur.lastidx())
 156                 return false;
 157         ++cur.idx();
 158         cur.pos() = 0;
 159         return true;
 160 }
 161
 162
 163 bool InsetMathNest::idxRight(LCursor & cur) const
 164 {
 165         return idxNext(cur);
 166 }
 167
 168
 169 bool InsetMathNest::idxPrev(LCursor & cur) const
 170 {
 171         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 172         if (cur.idx() == 0)
 173                 return false;
 174         --cur.idx();
 175         cur.pos() = cur.lastpos();
 176         return true;
 177 }
 178
 179
 180 bool InsetMathNest::idxLeft(LCursor & cur) const
 181 {
 182         return idxPrev(cur);
 183 }
 184
 185
 186 bool InsetMathNest::idxFirst(LCursor & cur) const
 187 {
 188         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 189         if (nargs() == 0)
 190                 return false;
 191         cur.idx() = 0;
 192         cur.pos() = 0;
 193         return true;
 194 }
 195
 196
 197 bool InsetMathNest::idxLast(LCursor & cur) const
 198 {
 199         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 200         if (nargs() == 0)
 201                 return false;
 202         cur.idx() = cur.lastidx();
 203         cur.pos() = cur.lastpos();
 204         return true;
 205 }
 206
 207
 208 void InsetMathNest::dump() const
 209 {
 210         WriteStream os(lyxerr);
 211         os << "---------------------------------------------\n";
 212         write(os);
 213         os << "\n";
 214         for (idx_type i = 0, n = nargs(); i != n; ++i)
 215                 os << cell(i) << "\n";
 216         os << "---------------------------------------------\n";
 217 }
 218
 219
 220 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 221 {
 222 #if 0
 223         if (lock_)
 224                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 225                                         LColor::mathlockbg);
 226 #endif
 227         setPosCache(pi, x, y);
 228 }
 229
 230
 231 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 232 {
 233         BufferView & bv = *pi.base.bv;
 234         // this should use the x/y values given, not the cached values
 235         LCursor & cur = bv.cursor();
 236         if (!cur.selection())
 237                 return;
 238         if (!ptr_cmp(&cur.inset(), this))
 239                 return;
 240
 241         // FIXME: hack to get position cache warm
 242         static lyx::frontend::NullPainter nop;
 243         PainterInfo pinop(pi);
 244         pinop.pain = nop;
 245         draw(pinop, x, y);
 246
 247         CursorSlice s1 = cur.selBegin();
 248         CursorSlice s2 = cur.selEnd();
 249
 250         //lyxerr << "InsetMathNest::drawing selection: "
 251         //      << " s1: " << s1 << " s2: " << s2 << endl;
 252         if (s1.idx() == s2.idx()) {
 253                 MathArray const & c = cell(s1.idx());
 254                 int x1 = c.xo(bv) + c.pos2x(s1.pos());
 255                 int y1 = c.yo(bv) - c.ascent();
 256                 int x2 = c.xo(bv) + c.pos2x(s2.pos());
 257                 int y2 = c.yo(bv) + c.descent();
 258                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 259         //lyxerr << "InsetMathNest::drawing selection 3: "
 260         //      << " x1: " << x1 << " x2: " << x2
 261         //      << " y1: " << y1 << " y2: " << y2 << endl;
 262         } else {
 263                 for (idx_type i = 0; i < nargs(); ++i) {
 264                         if (idxBetween(i, s1.idx(), s2.idx())) {
 265                                 MathArray const & c = cell(i);
 266                                 int x1 = c.xo(bv);
 267                                 int y1 = c.yo(bv) - c.ascent();
 268                                 int x2 = c.xo(bv) + c.width();
 269                                 int y2 = c.yo(bv) + c.descent();
 270                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 271                         }
 272                 }
 273         }
 274 }
 275
 276
 277 void InsetMathNest::validate(LaTeXFeatures & features) const
 278 {
 279         for (idx_type i = 0; i < nargs(); ++i)
 280                 cell(i).validate(features);
 281 }
 282
 283
 284 void InsetMathNest::replace(ReplaceData & rep)
 285 {
 286         for (idx_type i = 0; i < nargs(); ++i)
 287                 cell(i).replace(rep);
 288 }
 289
 290
 291 bool InsetMathNest::contains(MathArray const & ar) const
 292 {
 293         for (idx_type i = 0; i < nargs(); ++i)
 294                 if (cell(i).contains(ar))
 295                         return true;
 296         return false;
 297 }
 298
 299
 300 bool InsetMathNest::lock() const
 301 {
 302         return lock_;
 303 }
 304
 305
 306 void InsetMathNest::lock(bool l)
 307 {
 308         lock_ = l;
 309 }
 310
 311
 312 bool InsetMathNest::isActive() const
 313 {
 314         return nargs() > 0;
 315 }
 316
 317
 318 MathArray InsetMathNest::glue() const
 319 {
 320         MathArray ar;
 321         for (size_t i = 0; i < nargs(); ++i)
 322                 ar.append(cell(i));
 323         return ar;
 324 }
 325
 326
 327 void InsetMathNest::write(WriteStream & os) const
 328 {
 329         os << '\\' << name().c_str();
 330         for (size_t i = 0; i < nargs(); ++i)
 331                 os << '{' << cell(i) << '}';
 332         if (nargs() == 0)
 333                 os.pendingSpace(true);
 334         if (lock_ && !os.latex()) {
 335                 os << "\\lyxlock";
 336                 os.pendingSpace(true);
 337         }
 338 }
 339
 340
 341 void InsetMathNest::normalize(NormalStream & os) const
 342 {
 343         os << '[' << name().c_str();
 344         for (size_t i = 0; i < nargs(); ++i)
 345                 os << ' ' << cell(i);
 346         os << ']';
 347 }
 348
 349
 350 int InsetMathNest::latex(Buffer const &, std::ostream & os,
 351                         OutputParams const & runparams) const
 352 {
 353         WriteStream wi(os, runparams.moving_arg, true);
 354         write(wi);
 355         return wi.line();
 356 }
 357
 358
 359 bool InsetMathNest::notifyCursorLeaves(LCursor & /*cur*/)
 360 {
 361 #ifdef WITH_WARNINGS
 362 #warning look here
 363 #endif
 364 #if 0
 365         MathArray & ar = cur.cell();
 366         // remove base-only "scripts"
 367         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 368                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 369                 if (p && p->nargs() == 1) {
 370                         MathArray ar = p->nuc();
 371                         erase(i);
 372                         insert(i, ar);
 373                         cur.adjust(i, ar.size() - 1);
 374                 }
 375         }
 376
 377         // glue adjacent font insets of the same kind
 378         for (pos_type i = 0; i + 1 < size(); ++i) {
 379                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 380                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 381                 if (p && q && p->name() == q->name()) {
 382                         p->cell(0).append(q->cell(0));
 383                         erase(i + 1);
 384                         cur.adjust(i, -1);
 385                 }
 386         }
 387 #endif
 388         return false;
 389 }
 390
 391
 392 void InsetMathNest::handleFont
 393         (LCursor & cur, string const & arg, string const & font)
 394 {
 395         // this whole function is a hack and won't work for incremental font
 396         // changes...
 397         recordUndo(cur, Undo::ATOMIC);
 398
 399         if (cur.inset().asInsetMath()->name() == font)
 400                 cur.handleFont(font);
 401         else {
 402                 cur.handleNest(createInsetMath(font));
 403                 cur.insert(arg);
 404         }
 405 }
 406
 407
 408 void InsetMathNest::handleFont2(LCursor & cur, string const & arg)
 409 {
 410         recordUndo(cur, Undo::ATOMIC);
 411         LyXFont font;
 412         bool b;
 413         bv_funcs::string2font(arg, font, b);
 414         if (font.color() != LColor::inherit) {
 415                 MathAtom at = MathAtom(new InsetMathColor(true, font.color()));
 416                 cur.handleNest(at, 0);
 417         }
 418 }
 419
 420
 421 void InsetMathNest::doDispatch(LCursor & cur, FuncRequest & cmd)
 422 {
 423         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 424         //CursorSlice sl = cur.current();
 425
 426         switch (cmd.action) {
 427
 428         case LFUN_PASTE: {
 429                 recordUndo(cur);
 430                 cur.message(_("Paste"));
 431                 replaceSelection(cur);
 432                 size_t n = 0;
 433                 istringstream is(lyx::to_utf8(cmd.argument()));
 434                 is >> n;
 435                 docstring const selection = lyx::cap::getSelection(cur.buffer(), n);
 436                 // FIXME UNICODE
 437                 cur.niceInsert(lyx::to_utf8(selection));
 438                 cur.clearSelection(); // bug 393
 439                 cur.bv().switchKeyMap();
 440                 finishUndo();
 441                 break;
 442         }
 443
 444         case LFUN_CUT:
 445                 recordUndo(cur);
 446                 cutSelection(cur, true, true);
 447                 cur.message(_("Cut"));
 448                 // Prevent stale position >= size crash
 449                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 450                 cur.normalize();
 451                 break;
 452
 453         case LFUN_COPY:
 454                 copySelection(cur);
 455                 // FIXME UNICODE
 456                 cur.message(_("Copy"));
 457                 break;
 458
 459         case LFUN_MOUSE_PRESS:
 460                 lfunMousePress(cur, cmd);
 461                 break;
 462
 463         case LFUN_MOUSE_MOTION:
 464                 lfunMouseMotion(cur, cmd);
 465                 break;
 466
 467         case LFUN_MOUSE_RELEASE:
 468                 lfunMouseRelease(cur, cmd);
 469                 break;
 470
 471         case LFUN_FINISHED_LEFT:
 472                 cur.bv().cursor() = cur;
 473                 break;
 474
 475         case LFUN_FINISHED_RIGHT:
 476                 ++cur.pos();
 477                 cur.bv().cursor() = cur;
 478                 break;
 479
 480         case LFUN_FINISHED_UP:
 481                 cur.bv().cursor() = cur;
 482                 break;
 483
 484         case LFUN_FINISHED_DOWN:
 485                 ++cur.pos();
 486                 cur.bv().cursor() = cur;
 487                 break;
 488
 489         case LFUN_CHAR_FORWARD_SELECT:
 490         case LFUN_CHAR_FORWARD:
 491                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 492                 cur.autocorrect() = false;
 493                 cur.clearTargetX();
 494                 cur.macroModeClose();
 495                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 496                         cur.pushLeft(*cur.nextAtom().nucleus());
 497                         cur.inset().idxFirst(cur);
 498                 } else if (cur.posRight() || idxRight(cur)
 499                         || cur.popRight() || cur.selection())
 500                         ;
 501                 else {
 502                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 503                         cur.undispatched();
 504                 }
 505                 break;
 506
 507         case LFUN_CHAR_BACKWARD_SELECT:
 508         case LFUN_CHAR_BACKWARD:
 509                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 510                 cur.autocorrect() = false;
 511                 cur.clearTargetX();
 512                 cur.macroModeClose();
 513                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 514                         cur.posLeft();
 515                         cur.push(*cur.nextAtom().nucleus());
 516                         cur.inset().idxLast(cur);
 517                 } else if (cur.posLeft() || idxLeft(cur)
 518                         || cur.popLeft() || cur.selection())
 519                         ;
 520                 else {
 521                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 522                         cur.undispatched();
 523                 }
 524                 break;
 525
 526         case LFUN_UP_SELECT:
 527         case LFUN_UP:
 528                 // FIXME Tried to use clearTargetX and macroModeClose, crashed on cur.up()
 529                 if (cur.inMacroMode()) {
 530                         // Make Helge happy
 531                         cur.macroModeClose();
 532                         break;
 533                 }
 534                 cur.selHandle(cmd.action == LFUN_UP_SELECT);
 535                 if (!cur.up()) {
 536                         cmd = FuncRequest(LFUN_FINISHED_UP);
 537                         cur.undispatched();
 538                 }
 539                 // fixes bug 1598. Please check!
 540                 cur.normalize();
 541                 break;
 542
 543         case LFUN_DOWN_SELECT:
 544         case LFUN_DOWN:
 545                 if (cur.inMacroMode()) {
 546                         cur.macroModeClose();
 547                         break;
 548                 }
 549                 cur.selHandle(cmd.action == LFUN_DOWN_SELECT);
 550                 if (!cur.down()) {
 551                         cmd = FuncRequest(LFUN_FINISHED_DOWN);
 552                         cur.undispatched();
 553                 }
 554                 // fixes bug 1598. Please check!
 555                 cur.normalize();
 556                 break;
 557
 558         case LFUN_MOUSE_DOUBLE:
 559         case LFUN_MOUSE_TRIPLE:
 560         case LFUN_WORD_SELECT:
 561                 cur.pos() = 0;
 562                 cur.idx() = 0;
 563                 cur.resetAnchor();
 564                 cur.selection() = true;
 565                 cur.pos() = cur.lastpos();
 566                 cur.idx() = cur.lastidx();
 567                 break;
 568
 569         case LFUN_PARAGRAPH_UP_SELECT:
 570         case LFUN_PARAGRAPH_UP:
 571         case LFUN_PARAGRAPH_DOWN_SELECT:
 572         case LFUN_PARAGRAPH_DOWN:
 573                 break;
 574
 575         case LFUN_LINE_BEGIN_SELECT:
 576         case LFUN_LINE_BEGIN:
 577         case LFUN_WORD_BACKWARD_SELECT:
 578         case LFUN_WORD_BACKWARD:
 579                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 580                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 581                 cur.macroModeClose();
 582                 if (cur.pos() != 0) {
 583                         cur.pos() = 0;
 584                 } else if (cur.col() != 0) {
 585                         cur.idx() -= cur.col();
 586                         cur.pos() = 0;
 587                 } else if (cur.idx() != 0) {
 588                         cur.idx() = 0;
 589                         cur.pos() = 0;
 590                 } else {
 591                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 592                         cur.undispatched();
 593                 }
 594                 break;
 595
 596         case LFUN_WORD_FORWARD_SELECT:
 597         case LFUN_WORD_FORWARD:
 598         case LFUN_LINE_END_SELECT:
 599         case LFUN_LINE_END:
 600                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 601                                 cmd.action == LFUN_LINE_END_SELECT);
 602                 cur.macroModeClose();
 603                 cur.clearTargetX();
 604                 if (cur.pos() != cur.lastpos()) {
 605                         cur.pos() = cur.lastpos();
 606                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 607                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 608                         cur.pos() = cur.lastpos();
 609                 } else if (cur.idx() != cur.lastidx()) {
 610                         cur.idx() = cur.lastidx();
 611                         cur.pos() = cur.lastpos();
 612                 } else {
 613                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 614                         cur.undispatched();
 615                 }
 616                 break;
 617
 618         case LFUN_SCREEN_UP_SELECT:
 619         case LFUN_SCREEN_UP:
 620                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 621                 cur.undispatched();
 622                 break;
 623
 624         case LFUN_SCREEN_DOWN_SELECT:
 625         case LFUN_SCREEN_DOWN:
 626                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 627                 cur.undispatched();
 628                 break;
 629
 630         case LFUN_CELL_FORWARD:
 631                 cur.inset().idxNext(cur);
 632                 break;
 633
 634         case LFUN_CELL_BACKWARD:
 635                 cur.inset().idxPrev(cur);
 636                 break;
 637
 638         case LFUN_WORD_DELETE_BACKWARD:
 639         case LFUN_CHAR_DELETE_BACKWARD:
 640                 if (cur.pos() == 0)
 641                         // May affect external cell:
 642                         recordUndoInset(cur, Undo::ATOMIC);
 643                 else
 644                         recordUndo(cur, Undo::ATOMIC);
 645                 cur.backspace();
 646                 break;
 647
 648         case LFUN_WORD_DELETE_FORWARD:
 649         case LFUN_CHAR_DELETE_FORWARD:
 650                 if (cur.pos() == cur.lastpos())
 651                         // May affect external cell:
 652                         recordUndoInset(cur, Undo::ATOMIC);
 653                 else
 654                         recordUndo(cur, Undo::ATOMIC);
 655                 cur.erase();
 656                 break;
 657
 658         case LFUN_ESCAPE:
 659                 if (cur.selection())
 660                         cur.clearSelection();
 661                 else  {
 662                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 663                         cur.undispatched();
 664                 }
 665                 break;
 666
 667         case LFUN_INSET_TOGGLE:
 668                 recordUndo(cur);
 669                 lock(!lock());
 670                 cur.popRight();
 671                 break;
 672
 673         case LFUN_SELF_INSERT:
 674                 if (cmd.argument().size() != 1) {
 675                         recordUndo(cur);
 676                         string const arg = lyx::to_utf8(cmd.argument());
 677                         if (!interpret(cur, arg))
 678                                 cur.insert(arg);
 679                         break;
 680                 }
 681                 // Don't record undo steps if we are in macro mode and
 682                 // cmd.argument is the next character of the macro name.
 683                 // Otherwise we'll get an invalid cursor if we undo after
 684                 // the macro was finished and the macro is a known command,
 685                 // e.g. sqrt. LCursor::macroModeClose replaces in this case
 686                 // the InsetMathUnknown with name "frac" by an empty
 687                 // InsetMathFrac -> a pos value > 0 is invalid.
 688                 // A side effect is that an undo before the macro is finished
 689                 // undoes the complete macro, not only the last character.
 690                 if (!cur.inMacroMode())
 691                         recordUndo(cur);
 692
 693                 // spacial handling of space. If we insert an inset
 694                 // via macro mode, we want to put the cursor inside it
 695                 // if relevant. Think typing "\frac<space>".
 696                 if (cmd.argument()[0] == ' '
 697                     && cur.inMacroMode() && cur.macroName() != "\\"
 698                     && cur.macroModeClose()) {
 699                         MathAtom const atom = cur.prevAtom();
 700                         if (atom->asNestInset() && atom->nargs() > 0) {
 701                                 cur.posLeft();
 702                                 cur.pushLeft(*cur.nextInset());
 703                         }
 704                 // FIXME: Change to
 705                 // } else if (!interpret(cur, cmd.argument()[0])) {
 706                 // when interpret accepts UCS4 characters
 707                 } else if (!interpret(cur, lyx::to_utf8(cmd.argument()))) {
 708                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 709                         cur.undispatched();
 710                 }
 711                 break;
 712
 713         //case LFUN_SERVER_GET_XY:
 714         //      sprintf(dispatch_buffer, "%d %d",);
 715         //      break;
 716
 717         case LFUN_SERVER_SET_XY: {
 718                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 719                 int x = 0;
 720                 int y = 0;
 721                 istringstream is(lyx::to_utf8(cmd.argument()));
 722                 is >> x >> y;
 723                 cur.setScreenPos(x, y);
 724                 break;
 725         }
 726
 727         // Special casing for superscript in case of LyX handling
 728         // dead-keys:
 729         case LFUN_ACCENT_CIRCUMFLEX:
 730                 if (cmd.argument().empty()) {
 731                         // do superscript if LyX handles
 732                         // deadkeys
 733                         recordUndo(cur, Undo::ATOMIC);
 734                         script(cur, true, grabAndEraseSelection(cur));
 735                 }
 736                 break;
 737
 738         case LFUN_ACCENT_UMLAUT:
 739         case LFUN_ACCENT_ACUTE:
 740         case LFUN_ACCENT_GRAVE:
 741         case LFUN_ACCENT_BREVE:
 742         case LFUN_ACCENT_DOT:
 743         case LFUN_ACCENT_MACRON:
 744         case LFUN_ACCENT_CARON:
 745         case LFUN_ACCENT_TILDE:
 746         case LFUN_ACCENT_CEDILLA:
 747         case LFUN_ACCENT_CIRCLE:
 748         case LFUN_ACCENT_UNDERDOT:
 749         case LFUN_ACCENT_TIE:
 750         case LFUN_ACCENT_OGONEK:
 751         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 752                 break;
 753
 754         //  Math fonts
 755         case LFUN_FONT_FREE_APPLY:
 756         case LFUN_FONT_FREE_UPDATE:
 757                 handleFont2(cur, lyx::to_utf8(cmd.argument()));
 758                 break;
 759
 760         case LFUN_FONT_BOLD:
 761                 if (currentMode() == TEXT_MODE)
 762                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textbf");
 763                 else
 764                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathbf");
 765                 break;
 766         case LFUN_FONT_SANS:
 767                 if (currentMode() == TEXT_MODE)
 768                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textsf");
 769                 else
 770                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathsf");
 771                 break;
 772         case LFUN_FONT_EMPH:
 773                 if (currentMode() == TEXT_MODE)
 774                         handleFont(cur, lyx::to_utf8(cmd.argument()), "emph");
 775                 else
 776                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathcal");
 777                 break;
 778         case LFUN_FONT_ROMAN:
 779                 if (currentMode() == TEXT_MODE)
 780                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textrm");
 781                 else
 782                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathrm");
 783                 break;
 784         case LFUN_FONT_CODE:
 785                 if (currentMode() == TEXT_MODE)
 786                         handleFont(cur, lyx::to_utf8(cmd.argument()), "texttt");
 787                 else
 788                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathtt");
 789                 break;
 790         case LFUN_FONT_FRAK:
 791                 handleFont(cur, lyx::to_utf8(cmd.argument()), "mathfrak");
 792                 break;
 793         case LFUN_FONT_ITAL:
 794                 if (currentMode() == TEXT_MODE)
 795                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textit");
 796                 else
 797                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathit");
 798                 break;
 799         case LFUN_FONT_NOUN:
 800                 if (currentMode() == TEXT_MODE)
 801                         // FIXME: should be "noun"
 802                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textsc");
 803                 else
 804                         handleFont(cur, lyx::to_utf8(cmd.argument()), "mathbb");
 805                 break;
 806         //case LFUN_FONT_FREE_APPLY:
 807                 handleFont(cur, lyx::to_utf8(cmd.argument()), "textrm");
 808                 break;
 809         case LFUN_FONT_DEFAULT:
 810                 handleFont(cur, lyx::to_utf8(cmd.argument()), "textnormal");
 811                 break;
 812
 813         case LFUN_MATH_MODE: {
 814 #if 1
 815                 // ignore math-mode on when already in math mode
 816                 if (currentMode() == InsetBase::MATH_MODE && cmd.argument() == "on")
 817                         break;
 818                 cur.macroModeClose();
 819                 string const save_selection = grabAndEraseSelection(cur);
 820                 selClearOrDel(cur);
 821                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 822                 cur.plainInsert(MathAtom(new InsetMathBox("mbox")));
 823                 cur.posLeft();
 824                 cur.pushLeft(*cur.nextInset());
 825                 cur.niceInsert(save_selection);
 826 #else
 827                 if (currentMode() == InsetBase::TEXT_MODE) {
 828                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 829                         cur.message(_("create new math text environment ($...$)"));
 830                 } else {
 831                         handleFont(cur, lyx::to_utf8(cmd.argument()), "textrm");
 832                         cur.message(_("entered math text mode (textrm)"));
 833                 }
 834 #endif
 835                 break;
 836         }
 837
 838         case LFUN_MATH_SIZE:
 839 #if 0
 840                 recordUndo(cur);
 841                 cur.setSize(arg);
 842 #endif
 843                 break;
 844
 845         case LFUN_MATH_MATRIX: {
 846                 recordUndo(cur, Undo::ATOMIC);
 847                 unsigned int m = 1;
 848                 unsigned int n = 1;
 849                 string v_align;
 850                 string h_align;
 851                 istringstream is(lyx::to_utf8(cmd.argument()));
 852                 is >> m >> n >> v_align >> h_align;
 853                 if (m < 1)
 854                         m = 1;
 855                 if (n < 1)
 856                         n = 1;
 857                 v_align += 'c';
 858                 cur.niceInsert(
 859                         MathAtom(new InsetMathArray("array", m, n, v_align[0], h_align)));
 860                 break;
 861         }
 862
 863         case LFUN_MATH_DELIM: {
 864                 string ls;
 865                 string rs = lyx::support::split(lyx::to_utf8(cmd.argument()), ls, ' ');
 866                 // Reasonable default values
 867                 if (ls.empty())
 868                         ls = '(';
 869                 if (rs.empty())
 870                         rs = ')';
 871                 recordUndo(cur, Undo::ATOMIC);
 872                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 873                 break;
 874         }
 875
 876         case LFUN_MATH_BIGDELIM: {
 877                 string const lname = cmd.getArg(0);
 878                 string const ldelim = cmd.getArg(1);
 879                 string const rname = cmd.getArg(2);
 880                 string const rdelim = cmd.getArg(3);
 881                 latexkeys const * l = in_word_set(lname);
 882                 bool const have_l = l && l->inset == "big" &&
 883                                     InsetMathBig::isBigInsetDelim(ldelim);
 884                 l = in_word_set(rname);
 885                 bool const have_r = l && l->inset == "big" &&
 886                                     InsetMathBig::isBigInsetDelim(rdelim);
 887                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 888                 // or right delimiter.
 889                 if (have_l || have_r) {
 890                         recordUndo(cur, Undo::ATOMIC);
 891                         string const selection = grabAndEraseSelection(cur);
 892                         selClearOrDel(cur);
 893                         if (have_l)
 894                                 cur.insert(MathAtom(new InsetMathBig(lname,
 895                                                                 ldelim)));
 896                         cur.niceInsert(selection);
 897                         if (have_r)
 898                                 cur.insert(MathAtom(new InsetMathBig(rname,
 899                                                                 rdelim)));
 900                 }
 901                 // Don't call cur.undispatched() if we did nothing, this would
 902                 // lead to infinite recursion via LyXText::dispatch().
 903                 break;
 904         }
 905
 906         case LFUN_SPACE_INSERT:
 907         case LFUN_MATH_SPACE:
 908                 recordUndo(cur, Undo::ATOMIC);
 909                 cur.insert(MathAtom(new InsetMathSpace(",")));
 910                 break;
 911
 912         case LFUN_ERT_INSERT:
 913                 // interpret this as if a backslash was typed
 914                 recordUndo(cur, Undo::ATOMIC);
 915                 interpret(cur, '\\');
 916                 break;
 917
 918         case LFUN_MATH_SUBSCRIPT:
 919                 // interpret this as if a _ was typed
 920                 recordUndo(cur, Undo::ATOMIC);
 921                 interpret(cur, '_');
 922                 break;
 923
 924         case LFUN_MATH_SUPERSCRIPT:
 925                 // interpret this as if a ^ was typed
 926                 recordUndo(cur, Undo::ATOMIC);
 927                 interpret(cur, '^');
 928                 break;
 929
 930 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 931 // handling such that "self-insert" works on "arbitrary stuff" too, and
 932 // math-insert only handles special math things like "matrix".
 933         case LFUN_MATH_INSERT: {
 934                 recordUndo(cur, Undo::ATOMIC);
 935                 if (cmd.argument() == "^" || cmd.argument() == "_")
 936                         interpret(cur, cmd.argument()[0]);
 937                 else
 938                         cur.niceInsert(lyx::to_utf8(cmd.argument()));
 939                 break;
 940                 }
 941
 942         case LFUN_DIALOG_SHOW_NEW_INSET: {
 943                 string const & name = lyx::to_utf8(cmd.argument());
 944                 string data;
 945                 if (name == "ref") {
 946                         RefInset tmp(name);
 947                         data = tmp.createDialogStr(name);
 948                 }
 949                 cur.bv().showInsetDialog(name, data, 0);
 950                 break;
 951         }
 952
 953         case LFUN_INSET_INSERT: {
 954                 MathArray ar;
 955                 if (createInsetMath_fromDialogStr(lyx::to_utf8(cmd.argument()), ar)) {
 956                         recordUndo(cur);
 957                         cur.insert(ar);
 958                 } else
 959                         cur.undispatched();
 960                 break;
 961         }
 962
 963         default:
 964                 InsetMathDim::doDispatch(cur, cmd);
 965                 break;
 966         }
 967 }
 968
 969
 970 bool InsetMathNest::getStatus(LCursor & cur, FuncRequest const & cmd,
 971                 FuncStatus & flag) const
 972 {
 973         // the font related toggles
 974         //string tc = "mathnormal";
 975         bool ret = true;
 976         string const arg = lyx::to_utf8(cmd.argument());
 977         switch (cmd.action) {
 978         case LFUN_TABULAR_FEATURE:
 979                 flag.enabled(false);
 980                 break;
 981 #if 0
 982         case LFUN_TABULAR_FEATURE:
 983                 // FIXME: check temporarily disabled
 984                 // valign code
 985                 char align = mathcursor::valign();
 986                 if (align == '\0') {
 987                         enable = false;
 988                         break;
 989                 }
 990                 if (cmd.argument().empty()) {
 991                         flag.clear();
 992                         break;
 993                 }
 994                 if (!contains("tcb", cmd.argument()[0])) {
 995                         enable = false;
 996                         break;
 997                 }
 998                 flag.setOnOff(cmd.argument()[0] == align);
 999                 break;
1000 #endif
1001         /// We have to handle them since 1.4 blocks all unhandled actions
1002         case LFUN_FONT_ITAL:
1003         case LFUN_FONT_BOLD:
1004         case LFUN_FONT_SANS:
1005         case LFUN_FONT_EMPH:
1006         case LFUN_FONT_CODE:
1007         case LFUN_FONT_NOUN:
1008         case LFUN_FONT_ROMAN:
1009         case LFUN_FONT_DEFAULT:
1010                 flag.enabled(true);
1011                 break;
1012         case LFUN_MATH_MUTATE:
1013                 //flag.setOnOff(mathcursor::formula()->hullType() == lyx::to_utf8(cmd.argument()));
1014                 flag.setOnOff(false);
1015                 break;
1016
1017         // we just need to be in math mode to enable that
1018         case LFUN_MATH_SIZE:
1019         case LFUN_MATH_SPACE:
1020         case LFUN_MATH_LIMITS:
1021         case LFUN_MATH_NONUMBER:
1022         case LFUN_MATH_NUMBER:
1023         case LFUN_MATH_EXTERN:
1024                 flag.enabled(true);
1025                 break;
1026
1027         case LFUN_FONT_FRAK:
1028                 flag.enabled(currentMode() != TEXT_MODE);
1029                 break;
1030
1031         case LFUN_MATH_INSERT: {
1032                 bool const textarg =
1033                         arg == "\\textbf"   || arg == "\\textsf" ||
1034                         arg == "\\textrm"   || arg == "\\textmd" ||
1035                         arg == "\\textit"   || arg == "\\textsc" ||
1036                         arg == "\\textsl"   || arg == "\\textup" ||
1037                         arg == "\\texttt"   || arg == "\\textbb" ||
1038                         arg == "\\textnormal";
1039                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1040                 break;
1041         }
1042
1043         case LFUN_MATH_MATRIX:
1044                 flag.enabled(currentMode() == MATH_MODE);
1045                 break;
1046
1047         case LFUN_INSET_INSERT: {
1048                 // Don't test createMathInset_fromDialogStr(), since
1049                 // getStatus is not called with a valid reference and the
1050                 // dialog would not be applyable.
1051                 string const name = cmd.getArg(0);
1052                 flag.enabled(name == "ref");
1053                 break;
1054         }
1055
1056         case LFUN_MATH_DELIM:
1057         case LFUN_MATH_BIGDELIM:
1058                 // Don't do this with multi-cell selections
1059                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1060                 break;
1061
1062         default:
1063                 ret = false;
1064                 break;
1065         }
1066         return ret;
1067 }
1068
1069
1070 void InsetMathNest::edit(LCursor & cur, bool left)
1071 {
1072         cur.push(*this);
1073         cur.idx() = left ? 0 : cur.lastidx();
1074         cur.pos() = left ? 0 : cur.lastpos();
1075         cur.resetAnchor();
1076         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1077 }
1078
1079
1080 InsetBase * InsetMathNest::editXY(LCursor & cur, int x, int y)
1081 {
1082         int idx_min = 0;
1083         int dist_min = 1000000;
1084         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1085                 int const d = cell(i).dist(cur.bv(), x, y);
1086                 if (d < dist_min) {
1087                         dist_min = d;
1088                         idx_min = i;
1089                 }
1090         }
1091         MathArray & ar = cell(idx_min);
1092         cur.push(*this);
1093         cur.idx() = idx_min;
1094         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1095
1096         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1097         if (dist_min == 0) {
1098                 // hit inside cell
1099                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1100                         if (ar[i]->covers(cur.bv(), x, y))
1101                                 return ar[i].nucleus()->editXY(cur, x, y);
1102         }
1103         return this;
1104 }
1105
1106
1107 void InsetMathNest::lfunMousePress(LCursor & cur, FuncRequest & cmd)
1108 {
1109         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1110         BufferView & bv = cur.bv();
1111         if (cmd.button() == mouse_button::button1) {
1112                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1113                 bv.mouseSetCursor(cur);
1114         } else if (cmd.button() == mouse_button::button2) {
1115                 MathArray ar;
1116                 if (cur.selection())
1117                         asArray(bv.cursor().selectionAsString(false), ar);
1118                 else
1119                         asArray(theSelection().get(), ar);
1120
1121                 cur.insert(ar);
1122                 bv.mouseSetCursor(cur);
1123         }
1124 }
1125
1126
1127 void InsetMathNest::lfunMouseMotion(LCursor & cur, FuncRequest & cmd)
1128 {
1129         // only select with button 1
1130         if (cmd.button() == mouse_button::button1) {
1131                 LCursor & bvcur = cur.bv().cursor();
1132                 if (bvcur.anchor_.hasPart(cur)) {
1133                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1134                         bvcur.setCursor(cur);
1135                         bvcur.selection() = true;
1136                         //lyxerr << "MOTION " << bvcur << endl;
1137                 }
1138                 else {
1139                         cur.undispatched();
1140                 }
1141         }
1142 }
1143
1144
1145 void InsetMathNest::lfunMouseRelease(LCursor & cur, FuncRequest & cmd)
1146 {
1147         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1148
1149         if (cmd.button() == mouse_button::button1) {
1150                 //theSelection().put(cur.grabSelection());
1151                 return;
1152         }
1153
1154         if (cmd.button() == mouse_button::button3) {
1155                 // try to dispatch to enclosed insets first
1156                 cur.bv().showDialog("mathpanel");
1157                 return;
1158         }
1159
1160         cur.undispatched();
1161 }
1162
1163
1164 bool InsetMathNest::interpret(LCursor & cur, char c)
1165 {
1166         //lyxerr << "interpret 2: '" << c << "'" << endl;
1167         string save_selection;
1168         if (c == '^' || c == '_')
1169                 save_selection = grabAndEraseSelection(cur);
1170
1171         cur.clearTargetX();
1172
1173         // handle macroMode
1174         if (cur.inMacroMode()) {
1175                 string name = cur.macroName();
1176
1177                 /// are we currently typing '#1' or '#2' or...?
1178                 if (name == "\\#") {
1179                         cur.backspace();
1180                         int n = c - '0';
1181                         if (n >= 1 && n <= 9)
1182                                 cur.insert(new MathMacroArgument(n));
1183                         return true;
1184                 }
1185
1186                 if (isalpha(c)) {
1187                         cur.activeMacro()->setName(name + c);
1188                         return true;
1189                 }
1190
1191                 // handle 'special char' macros
1192                 if (name == "\\") {
1193                         // remove the '\\'
1194                         if (c == '\\') {
1195                                 cur.backspace();
1196                                 if (currentMode() == InsetMath::TEXT_MODE)
1197                                         cur.niceInsert(createInsetMath("textbackslash"));
1198                                 else
1199                                         cur.niceInsert(createInsetMath("backslash"));
1200                         } else if (c == '{') {
1201                                 cur.backspace();
1202                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1203                         } else if (c == '%') {
1204                                 cur.backspace();
1205                                 cur.niceInsert(MathAtom(new InsetMathComment));
1206                         } else if (c == '#') {
1207                                 BOOST_ASSERT(cur.activeMacro());
1208                                 cur.activeMacro()->setName(name + c);
1209                         } else {
1210                                 cur.backspace();
1211                                 cur.niceInsert(createInsetMath(string(1, c)));
1212                         }
1213                         return true;
1214                 }
1215
1216                 // One character big delimiters. The others are handled in
1217                 // the other interpret() method.
1218                 latexkeys const * l = in_word_set(name.substr(1));
1219                 if (name[0] == '\\' && l && l->inset == "big") {
1220                         string delim;
1221                         switch (c) {
1222                         case '{':
1223                                 delim = "\\{";
1224                                 break;
1225                         case '}':
1226                                 delim = "\\}";
1227                                 break;
1228                         default:
1229                                 delim = string(1, c);
1230                                 break;
1231                         }
1232                         if (InsetMathBig::isBigInsetDelim(delim)) {
1233                                 // name + delim ared a valid InsetMathBig.
1234                                 // We can't use cur.macroModeClose() because
1235                                 // it does not handle delim.
1236                                 InsetMathUnknown * p = cur.activeMacro();
1237                                 p->finalize();
1238                                 --cur.pos();
1239                                 cur.cell().erase(cur.pos());
1240                                 cur.plainInsert(MathAtom(
1241                                         new InsetMathBig(name.substr(1), delim)));
1242                                 return true;
1243                         }
1244                 }
1245
1246                 // leave macro mode and try again if necessary
1247                 cur.macroModeClose();
1248                 if (c == '{')
1249                         cur.niceInsert(MathAtom(new InsetMathBrace));
1250                 else if (c != ' ')
1251                         interpret(cur, c);
1252                 return true;
1253         }
1254
1255         // This is annoying as one has to press <space> far too often.
1256         // Disable it.
1257
1258 #if 0
1259                 // leave autocorrect mode if necessary
1260                 if (autocorrect() && c == ' ') {
1261                         autocorrect() = false;
1262                         return true;
1263                 }
1264 #endif
1265
1266         // just clear selection on pressing the space bar
1267         if (cur.selection() && c == ' ') {
1268                 cur.selection() = false;
1269                 return true;
1270         }
1271
1272         selClearOrDel(cur);
1273
1274         if (c == '\\') {
1275                 //lyxerr << "starting with macro" << endl;
1276                 cur.insert(MathAtom(new InsetMathUnknown("\\", false)));
1277                 return true;
1278         }
1279
1280         if (c == '\n') {
1281                 if (currentMode() == InsetMath::TEXT_MODE)
1282                         cur.insert(c);
1283                 return true;
1284         }
1285
1286         if (c == ' ') {
1287                 if (currentMode() == InsetMath::TEXT_MODE) {
1288                         // insert spaces in text mode,
1289                         // but suppress direct insertion of two spaces in a row
1290                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1291                         // it is better than nothing...
1292                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ')
1293                                 cur.insert(c);
1294                         return true;
1295                 }
1296                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1297                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1298                         return true;
1299                 }
1300                 if (cur.popRight())
1301                         return true;
1302                 // if are at the very end, leave the formula
1303                 return cur.pos() != cur.lastpos();
1304         }
1305
1306         // These shouldn't work in text mode:
1307         if (currentMode() != InsetMath::TEXT_MODE) {
1308                 if (c == '_') {
1309                         script(cur, false, save_selection);
1310                         return true;
1311                 }
1312                 if (c == '^') {
1313                         script(cur, true, save_selection);
1314                         return true;
1315                 }
1316                 if (c == '~') {
1317                         cur.niceInsert(createInsetMath("sim"));
1318                         return true;
1319                 }
1320         }
1321
1322         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1323             c == '%' || c == '_' || c == '^') {
1324                 cur.niceInsert(createInsetMath(string(1, c)));
1325                 return true;
1326         }
1327
1328
1329         // try auto-correction
1330         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1331         //      return true;
1332
1333         // no special circumstances, so insert the character without any fuss
1334         cur.insert(c);
1335         cur.autocorrect() = true;
1336         return true;
1337 }
1338
1339
1340 bool InsetMathNest::interpret(LCursor & cur, string const & str)
1341 {
1342         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1343         // possible
1344         if (!cur.empty() && cur.pos() > 0 &&
1345             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1346                 if (InsetMathBig::isBigInsetDelim(str)) {
1347                         string prev = asString(cur.cell()[cur.pos() - 1]);
1348                         if (prev[0] == '\\') {
1349                                 prev = prev.substr(1);
1350                                 latexkeys const * l = in_word_set(prev);
1351                                 if (l && l->inset == "big") {
1352                                         cur.cell()[cur.pos() - 1] =
1353                                                 MathAtom(new InsetMathBig(prev, str));
1354                                         return true;
1355                                 }
1356                         }
1357                 }
1358         }
1359         return false;
1360 }
1361
1362
1363 bool InsetMathNest::script(LCursor & cur, bool up, string const &
1364                 save_selection)
1365 {
1366         // Hack to get \^ and \_ working
1367         //lyxerr << "handling script: up: " << up << endl;
1368         if (cur.inMacroMode() && cur.macroName() == "\\") {
1369                 if (up)
1370                         cur.niceInsert(createInsetMath("mathcircumflex"));
1371                 else
1372                         interpret(cur, '_');
1373                 return true;
1374         }
1375
1376         cur.macroModeClose();
1377         if (asScriptInset() && cur.idx() == 0) {
1378                 // we are in a nucleus of a script inset, move to _our_ script
1379                 InsetMathScript * inset = asScriptInset();
1380                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1381                 inset->ensure(up);
1382                 cur.idx() = inset->idxOfScript(up);
1383                 cur.pos() = 0;
1384         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1385                 --cur.pos();
1386                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1387                 cur.push(*inset);
1388                 inset->ensure(up);
1389                 cur.idx() = inset->idxOfScript(up);
1390                 cur.pos() = cur.lastpos();
1391         } else {
1392                 // convert the thing to our left to a scriptinset or create a new
1393                 // one if in the very first position of the array
1394                 if (cur.pos() == 0) {
1395                         //lyxerr << "new scriptinset" << endl;
1396                         cur.insert(new InsetMathScript(up));
1397                 } else {
1398                         //lyxerr << "converting prev atom " << endl;
1399                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1400                 }
1401                 --cur.pos();
1402                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1403                 // special handling of {}-bases
1404                 // is this always correct?
1405                 if (inset->nuc().size() == 1
1406                     && inset->nuc().back()->asBraceInset())
1407                         inset->nuc() = inset->nuc().back()->asNestInset()->cell(0);
1408
1409                 cur.push(*inset);
1410                 cur.idx() = 1;
1411                 cur.pos() = 0;
1412         }
1413         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1414         cur.niceInsert(save_selection);
1415         cur.resetAnchor();
1416         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1417         return true;
1418 }