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