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 "MathStream.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
  56 #include "funcrequest.h"
  57 #include "lyxserver.h"
  58 #include "lyxsocket.h"
  59
  60 #include <sstream>
  61
  62
  63 namespace lyx {
  64
  65 using cap::copySelection;
  66 using cap::grabAndEraseSelection;
  67 using cap::cutSelection;
  68 using cap::replaceSelection;
  69 using cap::selClearOrDel;
  70
  71 using std::endl;
  72 using std::string;
  73 using std::istringstream;
  74
  75
  76 InsetMathNest::InsetMathNest(idx_type nargs)
  77         : cells_(nargs), lock_(false)
  78 {}
  79
  80
  81 InsetMath::idx_type InsetMathNest::nargs() const
  82 {
  83         return cells_.size();
  84 }
  85
  86
  87 MathArray & InsetMathNest::cell(idx_type i)
  88 {
  89         return cells_[i];
  90 }
  91
  92
  93 MathArray const & InsetMathNest::cell(idx_type i) const
  94 {
  95         return cells_[i];
  96 }
  97
  98
  99 void InsetMathNest::cursorPos(BufferView const & bv,
 100                 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         CoordCache const & coord_cache = bv.coordCache();
 113         if (!coord_cache.getArrays().has(&ar)) {
 114                 // this can (semi-)legally happen if we just created this cell
 115                 // and it never has been drawn before. So don't ASSERT.
 116                 //lyxerr << "no cached data for array " << &ar << endl;
 117                 x = 0;
 118                 y = 0;
 119                 return;
 120         }
 121         Point const pt = coord_cache.getArrays().xy(&ar);
 122         if (!coord_cache.getInsets().has(this)) {
 123                 // same as above
 124                 //lyxerr << "no cached data for inset " << this << endl;
 125                 x = 0;
 126                 y = 0;
 127                 return;
 128         }
 129         Point const pt2 = coord_cache.getInsets().xy(this);
 130         //lyxerr << "retrieving position cache for MathArray "
 131         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 132         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 133         y = pt.y_ - pt2.y_;
 134 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 135 //              << " asc: " << ascent() << "  des: " << descent()
 136 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 137         // move cursor visually into empty cells ("blue rectangles");
 138         if (ar.empty())
 139                 x += 2;
 140 }
 141
 142
 143 void InsetMathNest::metrics(MetricsInfo const & mi) const
 144 {
 145         MetricsInfo m = mi;
 146         for (idx_type i = 0, n = nargs(); i != n; ++i)
 147                 cell(i).metrics(m);
 148 }
 149
 150
 151 bool InsetMathNest::idxNext(LCursor & cur) const
 152 {
 153         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 154         if (cur.idx() == cur.lastidx())
 155                 return false;
 156         ++cur.idx();
 157         cur.pos() = 0;
 158         return true;
 159 }
 160
 161
 162 bool InsetMathNest::idxRight(LCursor & cur) const
 163 {
 164         return idxNext(cur);
 165 }
 166
 167
 168 bool InsetMathNest::idxPrev(LCursor & cur) const
 169 {
 170         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 171         if (cur.idx() == 0)
 172                 return false;
 173         --cur.idx();
 174         cur.pos() = cur.lastpos();
 175         return true;
 176 }
 177
 178
 179 bool InsetMathNest::idxLeft(LCursor & cur) const
 180 {
 181         return idxPrev(cur);
 182 }
 183
 184
 185 bool InsetMathNest::idxFirst(LCursor & cur) const
 186 {
 187         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 188         if (nargs() == 0)
 189                 return false;
 190         cur.idx() = 0;
 191         cur.pos() = 0;
 192         return true;
 193 }
 194
 195
 196 bool InsetMathNest::idxLast(LCursor & cur) const
 197 {
 198         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 199         if (nargs() == 0)
 200                 return false;
 201         cur.idx() = cur.lastidx();
 202         cur.pos() = cur.lastpos();
 203         return true;
 204 }
 205
 206
 207 void InsetMathNest::dump() const
 208 {
 209         odocstringstream oss;
 210         WriteStream os(oss);
 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         lyxerr << to_utf8(oss.str());
 218 }
 219
 220
 221 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 222 {
 223 #if 0
 224         if (lock_)
 225                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 226                                         LColor::mathlockbg);
 227 #endif
 228         setPosCache(pi, x, y);
 229 }
 230
 231
 232 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 233 {
 234         BufferView & bv = *pi.base.bv;
 235         // this should use the x/y values given, not the cached values
 236         LCursor & cur = bv.cursor();
 237         if (!cur.selection())
 238                 return;
 239         if (!ptr_cmp(&cur.inset(), this))
 240                 return;
 241
 242         // FIXME: hack to get position cache warm
 243         pi.pain.setDrawingEnabled(false);
 244         draw(pi, x, y);
 245         pi.pain.setDrawingEnabled(true);
 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 &, odocstream & 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, docstring const & arg, char const * const font)
 394 {
 395         handleFont(cur, arg, from_ascii(font));
 396 }
 397
 398
 399 void InsetMathNest::handleFont
 400         (LCursor & cur, docstring const & arg, docstring const & font)
 401 {
 402         // this whole function is a hack and won't work for incremental font
 403         // changes...
 404         recordUndo(cur, Undo::ATOMIC);
 405
 406         if (cur.inset().asInsetMath()->name() == font)
 407                 cur.handleFont(to_utf8(font));
 408         else {
 409                 cur.handleNest(createInsetMath(font));
 410                 cur.insert(arg);
 411         }
 412 }
 413
 414
 415 void InsetMathNest::handleFont2(LCursor & cur, docstring const & arg)
 416 {
 417         recordUndo(cur, Undo::ATOMIC);
 418         LyXFont font;
 419         bool b;
 420         bv_funcs::string2font(to_utf8(arg), font, b);
 421         if (font.color() != LColor::inherit) {
 422                 MathAtom at = MathAtom(new InsetMathColor(true, font.color()));
 423                 cur.handleNest(at, 0);
 424         }
 425 }
 426
 427
 428 void InsetMathNest::doDispatch(LCursor & cur, FuncRequest & cmd)
 429 {
 430         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 431         //CursorSlice sl = cur.current();
 432
 433         switch (cmd.action) {
 434
 435         case LFUN_PASTE: {
 436                 recordUndo(cur);
 437                 cur.message(_("Paste"));
 438                 replaceSelection(cur);
 439                 size_t n = 0;
 440                 istringstream is(to_utf8(cmd.argument()));
 441                 is >> n;
 442                 docstring const selection = cap::getSelection(cur.buffer(), n);
 443                 cur.niceInsert(selection);
 444                 cur.clearSelection(); // bug 393
 445                 cur.bv().switchKeyMap();
 446                 finishUndo();
 447                 break;
 448         }
 449
 450         case LFUN_CUT:
 451                 recordUndo(cur);
 452                 cutSelection(cur, true, true);
 453                 cur.message(_("Cut"));
 454                 // Prevent stale position >= size crash
 455                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 456                 cur.normalize();
 457                 break;
 458
 459         case LFUN_COPY:
 460                 copySelection(cur);
 461                 // FIXME UNICODE
 462                 cur.message(_("Copy"));
 463                 break;
 464
 465         case LFUN_MOUSE_PRESS:
 466                 lfunMousePress(cur, cmd);
 467                 break;
 468
 469         case LFUN_MOUSE_MOTION:
 470                 lfunMouseMotion(cur, cmd);
 471                 break;
 472
 473         case LFUN_MOUSE_RELEASE:
 474                 lfunMouseRelease(cur, cmd);
 475                 break;
 476
 477         case LFUN_FINISHED_LEFT:
 478                 cur.bv().cursor() = cur;
 479                 break;
 480
 481         case LFUN_FINISHED_RIGHT:
 482                 ++cur.pos();
 483                 cur.bv().cursor() = cur;
 484                 break;
 485
 486         case LFUN_FINISHED_UP:
 487                 cur.bv().cursor() = cur;
 488                 break;
 489
 490         case LFUN_FINISHED_DOWN:
 491                 ++cur.pos();
 492                 cur.bv().cursor() = cur;
 493                 break;
 494
 495         case LFUN_CHAR_FORWARD_SELECT:
 496         case LFUN_CHAR_FORWARD:
 497                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 498                 cur.autocorrect() = false;
 499                 cur.clearTargetX();
 500                 cur.macroModeClose();
 501                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 502                         cur.pushLeft(*cur.nextAtom().nucleus());
 503                         cur.inset().idxFirst(cur);
 504                 } else if (cur.posRight() || idxRight(cur)
 505                         || cur.popRight() || cur.selection())
 506                         ;
 507                 else {
 508                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 509                         cur.undispatched();
 510                 }
 511                 break;
 512
 513         case LFUN_CHAR_BACKWARD_SELECT:
 514         case LFUN_CHAR_BACKWARD:
 515                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 516                 cur.autocorrect() = false;
 517                 cur.clearTargetX();
 518                 cur.macroModeClose();
 519                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 520                         cur.posLeft();
 521                         cur.push(*cur.nextAtom().nucleus());
 522                         cur.inset().idxLast(cur);
 523                 } else if (cur.posLeft() || idxLeft(cur)
 524                         || cur.popLeft() || cur.selection())
 525                         ;
 526                 else {
 527                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 528                         cur.undispatched();
 529                 }
 530                 break;
 531
 532         case LFUN_UP_SELECT:
 533         case LFUN_UP:
 534                 // FIXME Tried to use clearTargetX and macroModeClose, crashed on cur.up()
 535                 if (cur.inMacroMode()) {
 536                         // Make Helge happy
 537                         cur.macroModeClose();
 538                         break;
 539                 }
 540                 cur.selHandle(cmd.action == LFUN_UP_SELECT);
 541                 if (!cur.up()) {
 542                         cmd = FuncRequest(LFUN_FINISHED_UP);
 543                         cur.undispatched();
 544                 }
 545                 // fixes bug 1598. Please check!
 546                 cur.normalize();
 547                 break;
 548
 549         case LFUN_DOWN_SELECT:
 550         case LFUN_DOWN:
 551                 if (cur.inMacroMode()) {
 552                         cur.macroModeClose();
 553                         break;
 554                 }
 555                 cur.selHandle(cmd.action == LFUN_DOWN_SELECT);
 556                 if (!cur.down()) {
 557                         cmd = FuncRequest(LFUN_FINISHED_DOWN);
 558                         cur.undispatched();
 559                 }
 560                 // fixes bug 1598. Please check!
 561                 cur.normalize();
 562                 break;
 563
 564         case LFUN_MOUSE_DOUBLE:
 565         case LFUN_MOUSE_TRIPLE:
 566         case LFUN_WORD_SELECT:
 567                 cur.pos() = 0;
 568                 cur.idx() = 0;
 569                 cur.resetAnchor();
 570                 cur.selection() = true;
 571                 cur.pos() = cur.lastpos();
 572                 cur.idx() = cur.lastidx();
 573                 break;
 574
 575         case LFUN_PARAGRAPH_UP_SELECT:
 576         case LFUN_PARAGRAPH_UP:
 577         case LFUN_PARAGRAPH_DOWN_SELECT:
 578         case LFUN_PARAGRAPH_DOWN:
 579                 break;
 580
 581         case LFUN_LINE_BEGIN_SELECT:
 582         case LFUN_LINE_BEGIN:
 583         case LFUN_WORD_BACKWARD_SELECT:
 584         case LFUN_WORD_BACKWARD:
 585                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 586                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 587                 cur.macroModeClose();
 588                 if (cur.pos() != 0) {
 589                         cur.pos() = 0;
 590                 } else if (cur.col() != 0) {
 591                         cur.idx() -= cur.col();
 592                         cur.pos() = 0;
 593                 } else if (cur.idx() != 0) {
 594                         cur.idx() = 0;
 595                         cur.pos() = 0;
 596                 } else {
 597                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 598                         cur.undispatched();
 599                 }
 600                 break;
 601
 602         case LFUN_WORD_FORWARD_SELECT:
 603         case LFUN_WORD_FORWARD:
 604         case LFUN_LINE_END_SELECT:
 605         case LFUN_LINE_END:
 606                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 607                                 cmd.action == LFUN_LINE_END_SELECT);
 608                 cur.macroModeClose();
 609                 cur.clearTargetX();
 610                 if (cur.pos() != cur.lastpos()) {
 611                         cur.pos() = cur.lastpos();
 612                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 613                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 614                         cur.pos() = cur.lastpos();
 615                 } else if (cur.idx() != cur.lastidx()) {
 616                         cur.idx() = cur.lastidx();
 617                         cur.pos() = cur.lastpos();
 618                 } else {
 619                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 620                         cur.undispatched();
 621                 }
 622                 break;
 623
 624         case LFUN_SCREEN_UP_SELECT:
 625         case LFUN_SCREEN_UP:
 626                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 627                 cur.undispatched();
 628                 break;
 629
 630         case LFUN_SCREEN_DOWN_SELECT:
 631         case LFUN_SCREEN_DOWN:
 632                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 633                 cur.undispatched();
 634                 break;
 635
 636         case LFUN_CELL_FORWARD:
 637                 cur.inset().idxNext(cur);
 638                 break;
 639
 640         case LFUN_CELL_BACKWARD:
 641                 cur.inset().idxPrev(cur);
 642                 break;
 643
 644         case LFUN_WORD_DELETE_BACKWARD:
 645         case LFUN_CHAR_DELETE_BACKWARD:
 646                 if (cur.pos() == 0)
 647                         // May affect external cell:
 648                         recordUndoInset(cur, Undo::ATOMIC);
 649                 else
 650                         recordUndo(cur, Undo::ATOMIC);
 651                 cur.backspace();
 652                 break;
 653
 654         case LFUN_WORD_DELETE_FORWARD:
 655         case LFUN_CHAR_DELETE_FORWARD:
 656                 if (cur.pos() == cur.lastpos())
 657                         // May affect external cell:
 658                         recordUndoInset(cur, Undo::ATOMIC);
 659                 else
 660                         recordUndo(cur, Undo::ATOMIC);
 661                 cur.erase();
 662                 break;
 663
 664         case LFUN_ESCAPE:
 665                 if (cur.selection())
 666                         cur.clearSelection();
 667                 else  {
 668                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 669                         cur.undispatched();
 670                 }
 671                 break;
 672
 673         case LFUN_INSET_TOGGLE:
 674                 recordUndo(cur);
 675                 lock(!lock());
 676                 cur.popRight();
 677                 break;
 678
 679         case LFUN_SELF_INSERT:
 680                 if (cmd.argument().size() != 1) {
 681                         recordUndo(cur);
 682                         docstring const arg = cmd.argument();
 683                         if (!interpretString(cur, arg))
 684                                 cur.insert(arg);
 685                         break;
 686                 }
 687                 // Don't record undo steps if we are in macro mode and
 688                 // cmd.argument is the next character of the macro name.
 689                 // Otherwise we'll get an invalid cursor if we undo after
 690                 // the macro was finished and the macro is a known command,
 691                 // e.g. sqrt. LCursor::macroModeClose replaces in this case
 692                 // the InsetMathUnknown with name "frac" by an empty
 693                 // InsetMathFrac -> a pos value > 0 is invalid.
 694                 // A side effect is that an undo before the macro is finished
 695                 // undoes the complete macro, not only the last character.
 696                 if (!cur.inMacroMode())
 697                         recordUndo(cur);
 698
 699                 // spacial handling of space. If we insert an inset
 700                 // via macro mode, we want to put the cursor inside it
 701                 // if relevant. Think typing "\frac<space>".
 702                 if (cmd.argument()[0] == ' '
 703                     && cur.inMacroMode() && cur.macroName() != "\\"
 704                     && cur.macroModeClose()) {
 705                         MathAtom const atom = cur.prevAtom();
 706                         if (atom->asNestInset() && atom->nargs() > 0) {
 707                                 cur.posLeft();
 708                                 cur.pushLeft(*cur.nextInset());
 709                         }
 710                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 711                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 712                         cur.undispatched();
 713                 }
 714                 break;
 715
 716         //case LFUN_SERVER_GET_XY:
 717         //      sprintf(dispatch_buffer, "%d %d",);
 718         //      break;
 719
 720         case LFUN_SERVER_SET_XY: {
 721                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 722                 int x = 0;
 723                 int y = 0;
 724                 istringstream is(to_utf8(cmd.argument()));
 725                 is >> x >> y;
 726                 cur.setScreenPos(x, y);
 727                 break;
 728         }
 729
 730         // Special casing for superscript in case of LyX handling
 731         // dead-keys:
 732         case LFUN_ACCENT_CIRCUMFLEX:
 733                 if (cmd.argument().empty()) {
 734                         // do superscript if LyX handles
 735                         // deadkeys
 736                         recordUndo(cur, Undo::ATOMIC);
 737                         script(cur, true, grabAndEraseSelection(cur));
 738                 }
 739                 break;
 740
 741         case LFUN_ACCENT_UMLAUT:
 742         case LFUN_ACCENT_ACUTE:
 743         case LFUN_ACCENT_GRAVE:
 744         case LFUN_ACCENT_BREVE:
 745         case LFUN_ACCENT_DOT:
 746         case LFUN_ACCENT_MACRON:
 747         case LFUN_ACCENT_CARON:
 748         case LFUN_ACCENT_TILDE:
 749         case LFUN_ACCENT_CEDILLA:
 750         case LFUN_ACCENT_CIRCLE:
 751         case LFUN_ACCENT_UNDERDOT:
 752         case LFUN_ACCENT_TIE:
 753         case LFUN_ACCENT_OGONEK:
 754         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 755                 break;
 756
 757         //  Math fonts
 758         case LFUN_FONT_FREE_APPLY:
 759         case LFUN_FONT_FREE_UPDATE:
 760                 handleFont2(cur, cmd.argument());
 761                 break;
 762
 763         case LFUN_FONT_BOLD:
 764                 if (currentMode() == TEXT_MODE)
 765                         handleFont(cur, cmd.argument(), "textbf");
 766                 else
 767                         handleFont(cur, cmd.argument(), "mathbf");
 768                 break;
 769         case LFUN_FONT_SANS:
 770                 if (currentMode() == TEXT_MODE)
 771                         handleFont(cur, cmd.argument(), "textsf");
 772                 else
 773                         handleFont(cur, cmd.argument(), "mathsf");
 774                 break;
 775         case LFUN_FONT_EMPH:
 776                 if (currentMode() == TEXT_MODE)
 777                         handleFont(cur, cmd.argument(), "emph");
 778                 else
 779                         handleFont(cur, cmd.argument(), "mathcal");
 780                 break;
 781         case LFUN_FONT_ROMAN:
 782                 if (currentMode() == TEXT_MODE)
 783                         handleFont(cur, cmd.argument(), "textrm");
 784                 else
 785                         handleFont(cur, cmd.argument(), "mathrm");
 786                 break;
 787         case LFUN_FONT_CODE:
 788                 if (currentMode() == TEXT_MODE)
 789                         handleFont(cur, cmd.argument(), "texttt");
 790                 else
 791                         handleFont(cur, cmd.argument(), "mathtt");
 792                 break;
 793         case LFUN_FONT_FRAK:
 794                 handleFont(cur, cmd.argument(), "mathfrak");
 795                 break;
 796         case LFUN_FONT_ITAL:
 797                 if (currentMode() == TEXT_MODE)
 798                         handleFont(cur, cmd.argument(), "textit");
 799                 else
 800                         handleFont(cur, cmd.argument(), "mathit");
 801                 break;
 802         case LFUN_FONT_NOUN:
 803                 if (currentMode() == TEXT_MODE)
 804                         // FIXME: should be "noun"
 805                         handleFont(cur, cmd.argument(), "textsc");
 806                 else
 807                         handleFont(cur, cmd.argument(), "mathbb");
 808                 break;
 809         //case LFUN_FONT_FREE_APPLY:
 810                 handleFont(cur, cmd.argument(), "textrm");
 811                 break;
 812         case LFUN_FONT_DEFAULT:
 813                 handleFont(cur, cmd.argument(), "textnormal");
 814                 break;
 815
 816         case LFUN_MATH_MODE: {
 817 #if 1
 818                 // ignore math-mode on when already in math mode
 819                 if (currentMode() == InsetBase::MATH_MODE && cmd.argument() == "on")
 820                         break;
 821                 cur.macroModeClose();
 822                 docstring const save_selection = grabAndEraseSelection(cur);
 823                 selClearOrDel(cur);
 824                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 825                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 826                 cur.posLeft();
 827                 cur.pushLeft(*cur.nextInset());
 828                 cur.niceInsert(save_selection);
 829 #else
 830                 if (currentMode() == InsetBase::TEXT_MODE) {
 831                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 832                         cur.message(_("create new math text environment ($...$)"));
 833                 } else {
 834                         handleFont(cur, cmd.argument(), "textrm");
 835                         cur.message(_("entered math text mode (textrm)"));
 836                 }
 837 #endif
 838                 break;
 839         }
 840
 841         case LFUN_MATH_SIZE:
 842 #if 0
 843                 recordUndo(cur);
 844                 cur.setSize(arg);
 845 #endif
 846                 break;
 847
 848         case LFUN_MATH_MATRIX: {
 849                 recordUndo(cur, Undo::ATOMIC);
 850                 unsigned int m = 1;
 851                 unsigned int n = 1;
 852                 docstring v_align;
 853                 docstring h_align;
 854                 idocstringstream is(cmd.argument());
 855                 is >> m >> n >> v_align >> h_align;
 856                 if (m < 1)
 857                         m = 1;
 858                 if (n < 1)
 859                         n = 1;
 860                 v_align += 'c';
 861                 cur.niceInsert(
 862                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 863                 break;
 864         }
 865
 866         case LFUN_MATH_DELIM: {
 867                 docstring ls;
 868                 docstring rs = support::split(cmd.argument(), ls, ' ');
 869                 // Reasonable default values
 870                 if (ls.empty())
 871                         ls = '(';
 872                 if (rs.empty())
 873                         rs = ')';
 874                 recordUndo(cur, Undo::ATOMIC);
 875                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 876                 break;
 877         }
 878
 879         case LFUN_MATH_BIGDELIM: {
 880                 docstring const lname  = from_utf8(cmd.getArg(0));
 881                 docstring const ldelim = from_utf8(cmd.getArg(1));
 882                 docstring const rname  = from_utf8(cmd.getArg(2));
 883                 docstring const rdelim = from_utf8(cmd.getArg(3));
 884                 latexkeys const * l = in_word_set(lname);
 885                 bool const have_l = l && l->inset == "big" &&
 886                                     InsetMathBig::isBigInsetDelim(ldelim);
 887                 l = in_word_set(rname);
 888                 bool const have_r = l && l->inset == "big" &&
 889                                     InsetMathBig::isBigInsetDelim(rdelim);
 890                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 891                 // or right delimiter.
 892                 if (have_l || have_r) {
 893                         recordUndo(cur, Undo::ATOMIC);
 894                         docstring const selection = grabAndEraseSelection(cur);
 895                         selClearOrDel(cur);
 896                         if (have_l)
 897                                 cur.insert(MathAtom(new InsetMathBig(lname,
 898                                                                 ldelim)));
 899                         cur.niceInsert(selection);
 900                         if (have_r)
 901                                 cur.insert(MathAtom(new InsetMathBig(rname,
 902                                                                 rdelim)));
 903                 }
 904                 // Don't call cur.undispatched() if we did nothing, this would
 905                 // lead to infinite recursion via LyXText::dispatch().
 906                 break;
 907         }
 908
 909         case LFUN_SPACE_INSERT:
 910         case LFUN_MATH_SPACE:
 911                 recordUndo(cur, Undo::ATOMIC);
 912                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 913                 break;
 914
 915         case LFUN_ERT_INSERT:
 916                 // interpret this as if a backslash was typed
 917                 recordUndo(cur, Undo::ATOMIC);
 918                 interpretChar(cur, '\\');
 919                 break;
 920
 921         case LFUN_MATH_SUBSCRIPT:
 922                 // interpret this as if a _ was typed
 923                 recordUndo(cur, Undo::ATOMIC);
 924                 interpretChar(cur, '_');
 925                 break;
 926
 927         case LFUN_MATH_SUPERSCRIPT:
 928                 // interpret this as if a ^ was typed
 929                 recordUndo(cur, Undo::ATOMIC);
 930                 interpretChar(cur, '^');
 931                 break;
 932
 933 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 934 // handling such that "self-insert" works on "arbitrary stuff" too, and
 935 // math-insert only handles special math things like "matrix".
 936         case LFUN_MATH_INSERT: {
 937                 recordUndo(cur, Undo::ATOMIC);
 938                 if (cmd.argument() == "^" || cmd.argument() == "_") {
 939                         interpretChar(cur, cmd.argument()[0]);
 940                 } else
 941                         cur.niceInsert(cmd.argument());
 942                 break;
 943                 }
 944
 945         case LFUN_DIALOG_SHOW_NEW_INSET: {
 946                 docstring const & name = cmd.argument();
 947                 string data;
 948                 if (name == "ref") {
 949                         RefInset tmp(name);
 950                         data = tmp.createDialogStr(to_utf8(name));
 951                 }
 952                 cur.bv().showInsetDialog(to_utf8(name), data, 0);
 953                 break;
 954         }
 955
 956         case LFUN_INSET_INSERT: {
 957                 MathArray ar;
 958                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
 959                         recordUndo(cur);
 960                         cur.insert(ar);
 961                 } else
 962                         cur.undispatched();
 963                 break;
 964         }
 965
 966         default:
 967                 InsetMathDim::doDispatch(cur, cmd);
 968                 break;
 969         }
 970 }
 971
 972
 973 bool InsetMathNest::getStatus(LCursor & cur, FuncRequest const & cmd,
 974                 FuncStatus & flag) const
 975 {
 976         // the font related toggles
 977         //string tc = "mathnormal";
 978         bool ret = true;
 979         string const arg = to_utf8(cmd.argument());
 980         switch (cmd.action) {
 981         case LFUN_TABULAR_FEATURE:
 982                 flag.enabled(false);
 983                 break;
 984 #if 0
 985         case LFUN_TABULAR_FEATURE:
 986                 // FIXME: check temporarily disabled
 987                 // valign code
 988                 char align = mathcursor::valign();
 989                 if (align == '\0') {
 990                         enable = false;
 991                         break;
 992                 }
 993                 if (cmd.argument().empty()) {
 994                         flag.clear();
 995                         break;
 996                 }
 997                 if (!contains("tcb", cmd.argument()[0])) {
 998                         enable = false;
 999                         break;
1000                 }
1001                 flag.setOnOff(cmd.argument()[0] == align);
1002                 break;
1003 #endif
1004         /// We have to handle them since 1.4 blocks all unhandled actions
1005         case LFUN_FONT_ITAL:
1006         case LFUN_FONT_BOLD:
1007         case LFUN_FONT_SANS:
1008         case LFUN_FONT_EMPH:
1009         case LFUN_FONT_CODE:
1010         case LFUN_FONT_NOUN:
1011         case LFUN_FONT_ROMAN:
1012         case LFUN_FONT_DEFAULT:
1013                 flag.enabled(true);
1014                 break;
1015         case LFUN_MATH_MUTATE:
1016                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1017                 flag.setOnOff(false);
1018                 break;
1019
1020         // we just need to be in math mode to enable that
1021         case LFUN_MATH_SIZE:
1022         case LFUN_MATH_SPACE:
1023         case LFUN_MATH_LIMITS:
1024         case LFUN_MATH_NONUMBER:
1025         case LFUN_MATH_NUMBER:
1026         case LFUN_MATH_EXTERN:
1027                 flag.enabled(true);
1028                 break;
1029
1030         case LFUN_FONT_FRAK:
1031                 flag.enabled(currentMode() != TEXT_MODE);
1032                 break;
1033
1034         case LFUN_MATH_INSERT: {
1035                 bool const textarg =
1036                         arg == "\\textbf"   || arg == "\\textsf" ||
1037                         arg == "\\textrm"   || arg == "\\textmd" ||
1038                         arg == "\\textit"   || arg == "\\textsc" ||
1039                         arg == "\\textsl"   || arg == "\\textup" ||
1040                         arg == "\\texttt"   || arg == "\\textbb" ||
1041                         arg == "\\textnormal";
1042                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1043                 break;
1044         }
1045
1046         case LFUN_MATH_MATRIX:
1047                 flag.enabled(currentMode() == MATH_MODE);
1048                 break;
1049
1050         case LFUN_INSET_INSERT: {
1051                 // Don't test createMathInset_fromDialogStr(), since
1052                 // getStatus is not called with a valid reference and the
1053                 // dialog would not be applyable.
1054                 string const name = cmd.getArg(0);
1055                 flag.enabled(name == "ref");
1056                 break;
1057         }
1058
1059         case LFUN_MATH_DELIM:
1060         case LFUN_MATH_BIGDELIM:
1061                 // Don't do this with multi-cell selections
1062                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1063                 break;
1064
1065         default:
1066                 ret = false;
1067                 break;
1068         }
1069         return ret;
1070 }
1071
1072
1073 void InsetMathNest::edit(LCursor & cur, bool left)
1074 {
1075         cur.push(*this);
1076         cur.idx() = left ? 0 : cur.lastidx();
1077         cur.pos() = left ? 0 : cur.lastpos();
1078         cur.resetAnchor();
1079         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1080 }
1081
1082
1083 InsetBase * InsetMathNest::editXY(LCursor & cur, int x, int y)
1084 {
1085         int idx_min = 0;
1086         int dist_min = 1000000;
1087         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1088                 int const d = cell(i).dist(cur.bv(), x, y);
1089                 if (d < dist_min) {
1090                         dist_min = d;
1091                         idx_min = i;
1092                 }
1093         }
1094         MathArray & ar = cell(idx_min);
1095         cur.push(*this);
1096         cur.idx() = idx_min;
1097         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1098
1099         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1100         if (dist_min == 0) {
1101                 // hit inside cell
1102                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1103                         if (ar[i]->covers(cur.bv(), x, y))
1104                                 return ar[i].nucleus()->editXY(cur, x, y);
1105         }
1106         return this;
1107 }
1108
1109
1110 void InsetMathNest::lfunMousePress(LCursor & cur, FuncRequest & cmd)
1111 {
1112         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1113         BufferView & bv = cur.bv();
1114         if (cmd.button() == mouse_button::button1) {
1115                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1116                 bv.mouseSetCursor(cur);
1117         } else if (cmd.button() == mouse_button::button2) {
1118                 MathArray ar;
1119                 if (cur.selection())
1120                         asArray(bv.cursor().selectionAsString(false), ar);
1121                 else
1122                         asArray(theSelection().get(), ar);
1123
1124                 cur.insert(ar);
1125                 bv.mouseSetCursor(cur);
1126         }
1127 }
1128
1129
1130 void InsetMathNest::lfunMouseMotion(LCursor & cur, FuncRequest & cmd)
1131 {
1132         // only select with button 1
1133         if (cmd.button() == mouse_button::button1) {
1134                 LCursor & bvcur = cur.bv().cursor();
1135                 if (bvcur.anchor_.hasPart(cur)) {
1136                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1137                         bvcur.setCursor(cur);
1138                         bvcur.selection() = true;
1139                         //lyxerr << "MOTION " << bvcur << endl;
1140                 }
1141                 else {
1142                         cur.undispatched();
1143                 }
1144         }
1145 }
1146
1147
1148 void InsetMathNest::lfunMouseRelease(LCursor & cur, FuncRequest & cmd)
1149 {
1150         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1151
1152         if (cmd.button() == mouse_button::button1) {
1153                 //theSelection().put(cur.grabSelection());
1154                 return;
1155         }
1156
1157         if (cmd.button() == mouse_button::button3) {
1158                 // try to dispatch to enclosed insets first
1159                 cur.bv().showDialog("mathpanel");
1160                 return;
1161         }
1162
1163         cur.undispatched();
1164 }
1165
1166
1167 bool InsetMathNest::interpretChar(LCursor & cur, char_type c)
1168 {
1169         //lyxerr << "interpret 2: '" << c << "'" << endl;
1170         docstring save_selection;
1171         if (c == '^' || c == '_')
1172                 save_selection = grabAndEraseSelection(cur);
1173
1174         cur.clearTargetX();
1175
1176         // handle macroMode
1177         if (cur.inMacroMode()) {
1178                 docstring name = cur.macroName();
1179
1180                 /// are we currently typing '#1' or '#2' or...?
1181                 if (name == "\\#") {
1182                         cur.backspace();
1183                         int n = c - '0';
1184                         if (n >= 1 && n <= 9)
1185                                 cur.insert(new MathMacroArgument(n));
1186                         return true;
1187                 }
1188
1189                 if (isalpha(c)) {
1190                         cur.activeMacro()->setName(name + docstring(1, c));
1191                         return true;
1192                 }
1193
1194                 // handle 'special char' macros
1195                 if (name == "\\") {
1196                         // remove the '\\'
1197                         if (c == '\\') {
1198                                 cur.backspace();
1199                                 if (currentMode() == InsetMath::TEXT_MODE)
1200                                         cur.niceInsert(createInsetMath("textbackslash"));
1201                                 else
1202                                         cur.niceInsert(createInsetMath("backslash"));
1203                         } else if (c == '{') {
1204                                 cur.backspace();
1205                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1206                         } else if (c == '%') {
1207                                 cur.backspace();
1208                                 cur.niceInsert(MathAtom(new InsetMathComment));
1209                         } else if (c == '#') {
1210                                 BOOST_ASSERT(cur.activeMacro());
1211                                 cur.activeMacro()->setName(name + docstring(1, c));
1212                         } else {
1213                                 cur.backspace();
1214                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1215                         }
1216                         return true;
1217                 }
1218
1219                 // One character big delimiters. The others are handled in
1220                 // interpretString().
1221                 latexkeys const * l = in_word_set(name.substr(1));
1222                 if (name[0] == '\\' && l && l->inset == "big") {
1223                         docstring delim;
1224                         switch (c) {
1225                         case '{':
1226                                 delim = from_ascii("\\{");
1227                                 break;
1228                         case '}':
1229                                 delim = from_ascii("\\}");
1230                                 break;
1231                         default:
1232                                 delim = docstring(1, c);
1233                                 break;
1234                         }
1235                         if (InsetMathBig::isBigInsetDelim(delim)) {
1236                                 // name + delim ared a valid InsetMathBig.
1237                                 // We can't use cur.macroModeClose() because
1238                                 // it does not handle delim.
1239                                 InsetMathUnknown * p = cur.activeMacro();
1240                                 p->finalize();
1241                                 --cur.pos();
1242                                 cur.cell().erase(cur.pos());
1243                                 cur.plainInsert(MathAtom(
1244                                         new InsetMathBig(name.substr(1), delim)));
1245                                 return true;
1246                         }
1247                 }
1248
1249                 // leave macro mode and try again if necessary
1250                 cur.macroModeClose();
1251                 if (c == '{')
1252                         cur.niceInsert(MathAtom(new InsetMathBrace));
1253                 else if (c != ' ')
1254                         interpretChar(cur, c);
1255                 return true;
1256         }
1257
1258         // This is annoying as one has to press <space> far too often.
1259         // Disable it.
1260
1261 #if 0
1262                 // leave autocorrect mode if necessary
1263                 if (autocorrect() && c == ' ') {
1264                         autocorrect() = false;
1265                         return true;
1266                 }
1267 #endif
1268
1269         // just clear selection on pressing the space bar
1270         if (cur.selection() && c == ' ') {
1271                 cur.selection() = false;
1272                 return true;
1273         }
1274
1275         selClearOrDel(cur);
1276
1277         if (c == '\\') {
1278                 //lyxerr << "starting with macro" << endl;
1279                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1280                 return true;
1281         }
1282
1283         if (c == '\n') {
1284                 if (currentMode() == InsetMath::TEXT_MODE)
1285                         cur.insert(c);
1286                 return true;
1287         }
1288
1289         if (c == ' ') {
1290                 if (currentMode() == InsetMath::TEXT_MODE) {
1291                         // insert spaces in text mode,
1292                         // but suppress direct insertion of two spaces in a row
1293                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1294                         // it is better than nothing...
1295                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ')
1296                                 cur.insert(c);
1297                         return true;
1298                 }
1299                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1300                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1301                         return true;
1302                 }
1303                 if (cur.popRight())
1304                         return true;
1305                 // if are at the very end, leave the formula
1306                 return cur.pos() != cur.lastpos();
1307         }
1308
1309         // These shouldn't work in text mode:
1310         if (currentMode() != InsetMath::TEXT_MODE) {
1311                 if (c == '_') {
1312                         script(cur, false, save_selection);
1313                         return true;
1314                 }
1315                 if (c == '^') {
1316                         script(cur, true, save_selection);
1317                         return true;
1318                 }
1319                 if (c == '~') {
1320                         cur.niceInsert(createInsetMath("sim"));
1321                         return true;
1322                 }
1323         }
1324
1325         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1326             c == '%' || c == '_' || c == '^') {
1327                 cur.niceInsert(createInsetMath(docstring(1, c)));
1328                 return true;
1329         }
1330
1331
1332         // try auto-correction
1333         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1334         //      return true;
1335
1336         // no special circumstances, so insert the character without any fuss
1337         cur.insert(c);
1338         cur.autocorrect() = true;
1339         return true;
1340 }
1341
1342
1343 bool InsetMathNest::interpretString(LCursor & cur, docstring const & str)
1344 {
1345         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1346         // possible
1347         if (!cur.empty() && cur.pos() > 0 &&
1348             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1349                 if (InsetMathBig::isBigInsetDelim(str)) {
1350                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1351                         if (prev[0] == '\\') {
1352                                 prev = prev.substr(1);
1353                                 latexkeys const * l = in_word_set(prev);
1354                                 if (l && l->inset == "big") {
1355                                         cur.cell()[cur.pos() - 1] =
1356                                                 MathAtom(new InsetMathBig(prev, str));
1357                                         return true;
1358                                 }
1359                         }
1360                 }
1361         }
1362         return false;
1363 }
1364
1365
1366 bool InsetMathNest::script(LCursor & cur, bool up,
1367                 docstring const & save_selection)
1368 {
1369         // Hack to get \^ and \_ working
1370         //lyxerr << "handling script: up: " << up << endl;
1371         if (cur.inMacroMode() && cur.macroName() == "\\") {
1372                 if (up)
1373                         cur.niceInsert(createInsetMath("mathcircumflex"));
1374                 else
1375                         interpretChar(cur, '_');
1376                 return true;
1377         }
1378
1379         cur.macroModeClose();
1380         if (asScriptInset() && cur.idx() == 0) {
1381                 // we are in a nucleus of a script inset, move to _our_ script
1382                 InsetMathScript * inset = asScriptInset();
1383                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1384                 inset->ensure(up);
1385                 cur.idx() = inset->idxOfScript(up);
1386                 cur.pos() = 0;
1387         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1388                 --cur.pos();
1389                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1390                 cur.push(*inset);
1391                 inset->ensure(up);
1392                 cur.idx() = inset->idxOfScript(up);
1393                 cur.pos() = cur.lastpos();
1394         } else {
1395                 // convert the thing to our left to a scriptinset or create a new
1396                 // one if in the very first position of the array
1397                 if (cur.pos() == 0) {
1398                         //lyxerr << "new scriptinset" << endl;
1399                         cur.insert(new InsetMathScript(up));
1400                 } else {
1401                         //lyxerr << "converting prev atom " << endl;
1402                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1403                 }
1404                 --cur.pos();
1405                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1406                 // special handling of {}-bases
1407                 // is this always correct?
1408                 if (inset->nuc().size() == 1
1409                     && inset->nuc().back()->asBraceInset())
1410                         inset->nuc() = inset->nuc().back()->asNestInset()->cell(0);
1411
1412                 cur.push(*inset);
1413                 cur.idx() = 1;
1414                 cur.pos() = 0;
1415         }
1416         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1417         cur.niceInsert(save_selection);
1418         cur.resetAnchor();
1419         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1420         return true;
1421 }
1422
1423
1424 } // namespace lyx