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 #include "support/textutils.h"
  53
  54 #include "frontends/Clipboard.h"
  55 #include "frontends/Painter.h"
  56 #include "frontends/Selection.h"
  57
  58 #include "funcrequest.h"
  59 #include "lyxserver.h"
  60 #include "lyxsocket.h"
  61
  62 #include <sstream>
  63
  64
  65 namespace lyx {
  66
  67 using cap::copySelection;
  68 using cap::grabAndEraseSelection;
  69 using cap::cutSelection;
  70 using cap::replaceSelection;
  71 using cap::selClearOrDel;
  72
  73 using std::endl;
  74 using std::string;
  75 using std::istringstream;
  76
  77
  78 InsetMathNest::InsetMathNest(idx_type nargs)
  79         : cells_(nargs), lock_(false)
  80 {}
  81
  82
  83 InsetMath::idx_type InsetMathNest::nargs() const
  84 {
  85         return cells_.size();
  86 }
  87
  88
  89 MathArray & InsetMathNest::cell(idx_type i)
  90 {
  91         return cells_[i];
  92 }
  93
  94
  95 MathArray const & InsetMathNest::cell(idx_type i) const
  96 {
  97         return cells_[i];
  98 }
  99
 100
 101 void InsetMathNest::cursorPos(BufferView const & bv,
 102                 CursorSlice const & sl, bool /*boundary*/,
 103                 int & x, int & y) const
 104 {
 105 // FIXME: This is a hack. Ideally, the coord cache should not store
 106 // absolute positions, but relative ones. This would mean to call
 107 // setXY() not in MathArray::draw(), but in the parent insets' draw()
 108 // with the correctly adjusted x,y values. But this means that we'd have
 109 // to touch all (math)inset's draw() methods. Right now, we'll store
 110 // absolute value, and make them here relative, only to make them
 111 // absolute again when actually drawing the cursor. What a mess.
 112         BOOST_ASSERT(ptr_cmp(&sl.inset(), this));
 113         MathArray const & ar = sl.cell();
 114         CoordCache const & coord_cache = bv.coordCache();
 115         if (!coord_cache.getArrays().has(&ar)) {
 116                 // this can (semi-)legally happen if we just created this cell
 117                 // and it never has been drawn before. So don't ASSERT.
 118                 //lyxerr << "no cached data for array " << &ar << endl;
 119                 x = 0;
 120                 y = 0;
 121                 return;
 122         }
 123         Point const pt = coord_cache.getArrays().xy(&ar);
 124         if (!coord_cache.getInsets().has(this)) {
 125                 // same as above
 126                 //lyxerr << "no cached data for inset " << this << endl;
 127                 x = 0;
 128                 y = 0;
 129                 return;
 130         }
 131         Point const pt2 = coord_cache.getInsets().xy(this);
 132         //lyxerr << "retrieving position cache for MathArray "
 133         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 134         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 135         y = pt.y_ - pt2.y_;
 136 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 137 //              << " asc: " << ascent() << "  des: " << descent()
 138 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 139         // move cursor visually into empty cells ("blue rectangles");
 140         if (ar.empty())
 141                 x += 2;
 142 }
 143
 144
 145 void InsetMathNest::metrics(MetricsInfo const & mi) const
 146 {
 147         MetricsInfo m = mi;
 148         for (idx_type i = 0, n = nargs(); i != n; ++i)
 149                 cell(i).metrics(m);
 150 }
 151
 152
 153 bool InsetMathNest::idxNext(LCursor & cur) const
 154 {
 155         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 156         if (cur.idx() == cur.lastidx())
 157                 return false;
 158         ++cur.idx();
 159         cur.pos() = 0;
 160         return true;
 161 }
 162
 163
 164 bool InsetMathNest::idxRight(LCursor & cur) const
 165 {
 166         return idxNext(cur);
 167 }
 168
 169
 170 bool InsetMathNest::idxPrev(LCursor & cur) const
 171 {
 172         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 173         if (cur.idx() == 0)
 174                 return false;
 175         --cur.idx();
 176         cur.pos() = cur.lastpos();
 177         return true;
 178 }
 179
 180
 181 bool InsetMathNest::idxLeft(LCursor & cur) const
 182 {
 183         return idxPrev(cur);
 184 }
 185
 186
 187 bool InsetMathNest::idxFirst(LCursor & cur) const
 188 {
 189         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 190         if (nargs() == 0)
 191                 return false;
 192         cur.idx() = 0;
 193         cur.pos() = 0;
 194         return true;
 195 }
 196
 197
 198 bool InsetMathNest::idxLast(LCursor & cur) const
 199 {
 200         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 201         if (nargs() == 0)
 202                 return false;
 203         cur.idx() = cur.lastidx();
 204         cur.pos() = cur.lastpos();
 205         return true;
 206 }
 207
 208
 209 void InsetMathNest::dump() const
 210 {
 211         odocstringstream oss;
 212         WriteStream os(oss);
 213         os << "---------------------------------------------\n";
 214         write(os);
 215         os << "\n";
 216         for (idx_type i = 0, n = nargs(); i != n; ++i)
 217                 os << cell(i) << "\n";
 218         os << "---------------------------------------------\n";
 219         lyxerr << to_utf8(oss.str());
 220 }
 221
 222
 223 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 224 {
 225 #if 0
 226         if (lock_)
 227                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 228                                         LColor::mathlockbg);
 229 #endif
 230         setPosCache(pi, x, y);
 231 }
 232
 233
 234 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 235 {
 236         BufferView & bv = *pi.base.bv;
 237         // this should use the x/y values given, not the cached values
 238         LCursor & cur = bv.cursor();
 239         if (!cur.selection())
 240                 return;
 241         if (!ptr_cmp(&cur.inset(), this))
 242                 return;
 243
 244         // FIXME: hack to get position cache warm
 245         pi.pain.setDrawingEnabled(false);
 246         draw(pi, x, y);
 247         pi.pain.setDrawingEnabled(true);
 248
 249         CursorSlice s1 = cur.selBegin();
 250         CursorSlice s2 = cur.selEnd();
 251
 252         //lyxerr << "InsetMathNest::drawing selection: "
 253         //      << " s1: " << s1 << " s2: " << s2 << endl;
 254         if (s1.idx() == s2.idx()) {
 255                 MathArray const & c = cell(s1.idx());
 256                 int x1 = c.xo(bv) + c.pos2x(s1.pos());
 257                 int y1 = c.yo(bv) - c.ascent();
 258                 int x2 = c.xo(bv) + c.pos2x(s2.pos());
 259                 int y2 = c.yo(bv) + c.descent();
 260                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 261         //lyxerr << "InsetMathNest::drawing selection 3: "
 262         //      << " x1: " << x1 << " x2: " << x2
 263         //      << " y1: " << y1 << " y2: " << y2 << endl;
 264         } else {
 265                 for (idx_type i = 0; i < nargs(); ++i) {
 266                         if (idxBetween(i, s1.idx(), s2.idx())) {
 267                                 MathArray const & c = cell(i);
 268                                 int x1 = c.xo(bv);
 269                                 int y1 = c.yo(bv) - c.ascent();
 270                                 int x2 = c.xo(bv) + c.width();
 271                                 int y2 = c.yo(bv) + c.descent();
 272                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 273                         }
 274                 }
 275         }
 276 }
 277
 278
 279 void InsetMathNest::validate(LaTeXFeatures & features) const
 280 {
 281         for (idx_type i = 0; i < nargs(); ++i)
 282                 cell(i).validate(features);
 283 }
 284
 285
 286 void InsetMathNest::replace(ReplaceData & rep)
 287 {
 288         for (idx_type i = 0; i < nargs(); ++i)
 289                 cell(i).replace(rep);
 290 }
 291
 292
 293 bool InsetMathNest::contains(MathArray const & ar) const
 294 {
 295         for (idx_type i = 0; i < nargs(); ++i)
 296                 if (cell(i).contains(ar))
 297                         return true;
 298         return false;
 299 }
 300
 301
 302 bool InsetMathNest::lock() const
 303 {
 304         return lock_;
 305 }
 306
 307
 308 void InsetMathNest::lock(bool l)
 309 {
 310         lock_ = l;
 311 }
 312
 313
 314 bool InsetMathNest::isActive() const
 315 {
 316         return nargs() > 0;
 317 }
 318
 319
 320 MathArray InsetMathNest::glue() const
 321 {
 322         MathArray ar;
 323         for (size_t i = 0; i < nargs(); ++i)
 324                 ar.append(cell(i));
 325         return ar;
 326 }
 327
 328
 329 void InsetMathNest::write(WriteStream & os) const
 330 {
 331         os << '\\' << name().c_str();
 332         for (size_t i = 0; i < nargs(); ++i)
 333                 os << '{' << cell(i) << '}';
 334         if (nargs() == 0)
 335                 os.pendingSpace(true);
 336         if (lock_ && !os.latex()) {
 337                 os << "\\lyxlock";
 338                 os.pendingSpace(true);
 339         }
 340 }
 341
 342
 343 void InsetMathNest::normalize(NormalStream & os) const
 344 {
 345         os << '[' << name().c_str();
 346         for (size_t i = 0; i < nargs(); ++i)
 347                 os << ' ' << cell(i);
 348         os << ']';
 349 }
 350
 351
 352 int InsetMathNest::latex(Buffer const &, odocstream & os,
 353                         OutputParams const & runparams) const
 354 {
 355         WriteStream wi(os, runparams.moving_arg, true);
 356         write(wi);
 357         return wi.line();
 358 }
 359
 360
 361 bool InsetMathNest::notifyCursorLeaves(LCursor & /*cur*/)
 362 {
 363 #ifdef WITH_WARNINGS
 364 #warning look here
 365 #endif
 366 #if 0
 367         MathArray & ar = cur.cell();
 368         // remove base-only "scripts"
 369         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 370                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 371                 if (p && p->nargs() == 1) {
 372                         MathArray ar = p->nuc();
 373                         erase(i);
 374                         insert(i, ar);
 375                         cur.adjust(i, ar.size() - 1);
 376                 }
 377         }
 378
 379         // glue adjacent font insets of the same kind
 380         for (pos_type i = 0; i + 1 < size(); ++i) {
 381                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 382                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 383                 if (p && q && p->name() == q->name()) {
 384                         p->cell(0).append(q->cell(0));
 385                         erase(i + 1);
 386                         cur.adjust(i, -1);
 387                 }
 388         }
 389 #endif
 390         return false;
 391 }
 392
 393
 394 void InsetMathNest::handleFont
 395         (LCursor & cur, docstring const & arg, char const * const font)
 396 {
 397         handleFont(cur, arg, from_ascii(font));
 398 }
 399
 400
 401 void InsetMathNest::handleFont
 402         (LCursor & cur, docstring const & arg, docstring const & font)
 403 {
 404         // this whole function is a hack and won't work for incremental font
 405         // changes...
 406
 407         if (cur.inset().asInsetMath()->name() == font) {
 408                 recordUndoInset(cur, Undo::ATOMIC);
 409                 cur.handleFont(to_utf8(font));
 410         } else {
 411                 recordUndo(cur, Undo::ATOMIC);
 412                 cur.handleNest(createInsetMath(font));
 413                 cur.insert(arg);
 414         }
 415 }
 416
 417
 418 void InsetMathNest::handleFont2(LCursor & cur, docstring const & arg)
 419 {
 420         recordUndo(cur, Undo::ATOMIC);
 421         LyXFont font;
 422         bool b;
 423         bv_funcs::string2font(to_utf8(arg), font, b);
 424         if (font.color() != LColor::inherit) {
 425                 MathAtom at = MathAtom(new InsetMathColor(true, font.color()));
 426                 cur.handleNest(at, 0);
 427         }
 428 }
 429
 430
 431 void InsetMathNest::doDispatch(LCursor & cur, FuncRequest & cmd)
 432 {
 433         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 434         //CursorSlice sl = cur.current();
 435
 436         switch (cmd.action) {
 437
 438         case LFUN_PASTE: {
 439                 recordUndo(cur);
 440                 cur.message(_("Paste"));
 441                 replaceSelection(cur);
 442                 docstring topaste;
 443                 if (cmd.argument().empty() && !theClipboard().isInternal())
 444                         topaste = theClipboard().getAsText();
 445                 else {
 446                         size_t n = 0;
 447                         idocstringstream is(cmd.argument());
 448                         is >> n;
 449                         topaste = cap::getSelection(cur.buffer(), n);
 450                 }
 451                 cur.niceInsert(topaste);
 452                 cur.clearSelection(); // bug 393
 453                 cur.bv().switchKeyMap();
 454                 finishUndo();
 455                 break;
 456         }
 457
 458         case LFUN_CUT:
 459                 recordUndo(cur);
 460                 cutSelection(cur, true, true);
 461                 cur.message(_("Cut"));
 462                 // Prevent stale position >= size crash
 463                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 464                 cur.normalize();
 465                 break;
 466
 467         case LFUN_COPY:
 468                 copySelection(cur);
 469                 cur.message(_("Copy"));
 470                 break;
 471
 472         case LFUN_MOUSE_PRESS:
 473                 lfunMousePress(cur, cmd);
 474                 break;
 475
 476         case LFUN_MOUSE_MOTION:
 477                 lfunMouseMotion(cur, cmd);
 478                 break;
 479
 480         case LFUN_MOUSE_RELEASE:
 481                 lfunMouseRelease(cur, cmd);
 482                 break;
 483
 484         case LFUN_FINISHED_LEFT:
 485                 cur.bv().cursor() = cur;
 486                 break;
 487
 488         case LFUN_FINISHED_RIGHT:
 489                 ++cur.pos();
 490                 cur.bv().cursor() = cur;
 491                 break;
 492
 493         case LFUN_FINISHED_UP:
 494                 cur.bv().cursor() = cur;
 495                 break;
 496
 497         case LFUN_FINISHED_DOWN:
 498                 ++cur.pos();
 499                 cur.bv().cursor() = cur;
 500                 break;
 501
 502         case LFUN_CHAR_FORWARD:
 503                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 504         case LFUN_CHAR_FORWARD_SELECT:
 505                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 506                 cur.autocorrect() = false;
 507                 cur.clearTargetX();
 508                 cur.macroModeClose();
 509                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 510                         cur.pushLeft(*cur.nextAtom().nucleus());
 511                         cur.inset().idxFirst(cur);
 512                 } else if (cur.posRight() || idxRight(cur)
 513                         || cur.popRight() || cur.selection())
 514                         ;
 515                 else {
 516                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 517                         cur.undispatched();
 518                 }
 519                 break;
 520
 521         case LFUN_CHAR_BACKWARD:
 522                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 523         case LFUN_CHAR_BACKWARD_SELECT:
 524                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 525                 cur.autocorrect() = false;
 526                 cur.clearTargetX();
 527                 cur.macroModeClose();
 528                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 529                         cur.posLeft();
 530                         cur.push(*cur.nextAtom().nucleus());
 531                         cur.inset().idxLast(cur);
 532                 } else if (cur.posLeft() || idxLeft(cur)
 533                         || cur.popLeft() || cur.selection())
 534                         ;
 535                 else {
 536                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 537                         cur.undispatched();
 538                 }
 539                 break;
 540
 541         case LFUN_UP:
 542                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 543         case LFUN_UP_SELECT:
 544                 // FIXME Tried to use clearTargetX and macroModeClose, crashed on cur.up()
 545                 if (cur.inMacroMode()) {
 546                         // Make Helge happy
 547                         cur.macroModeClose();
 548                         break;
 549                 }
 550                 cur.selHandle(cmd.action == LFUN_UP_SELECT);
 551                 if (!cur.up()) {
 552                         cmd = FuncRequest(LFUN_FINISHED_UP);
 553                         cur.undispatched();
 554                 }
 555                 // fixes bug 1598. Please check!
 556                 cur.normalize();
 557                 break;
 558
 559         case LFUN_DOWN:
 560                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 561         case LFUN_DOWN_SELECT:
 562                 if (cur.inMacroMode()) {
 563                         cur.macroModeClose();
 564                         break;
 565                 }
 566                 cur.selHandle(cmd.action == LFUN_DOWN_SELECT);
 567                 if (!cur.down()) {
 568                         cmd = FuncRequest(LFUN_FINISHED_DOWN);
 569                         cur.undispatched();
 570                 }
 571                 // fixes bug 1598. Please check!
 572                 cur.normalize();
 573                 break;
 574
 575         case LFUN_MOUSE_DOUBLE:
 576         case LFUN_MOUSE_TRIPLE:
 577         case LFUN_WORD_SELECT:
 578                 cur.pos() = 0;
 579                 cur.idx() = 0;
 580                 cur.resetAnchor();
 581                 cur.selection() = true;
 582                 cur.pos() = cur.lastpos();
 583                 cur.idx() = cur.lastidx();
 584                 cap::saveSelection(cur);
 585                 break;
 586
 587         case LFUN_PARAGRAPH_UP:
 588         case LFUN_PARAGRAPH_DOWN:
 589                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 590         case LFUN_PARAGRAPH_UP_SELECT:
 591         case LFUN_PARAGRAPH_DOWN_SELECT:
 592                 break;
 593
 594         case LFUN_LINE_BEGIN:
 595         case LFUN_WORD_BACKWARD:
 596                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 597         case LFUN_LINE_BEGIN_SELECT:
 598         case LFUN_WORD_BACKWARD_SELECT:
 599                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 600                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 601                 cur.macroModeClose();
 602                 if (cur.pos() != 0) {
 603                         cur.pos() = 0;
 604                 } else if (cur.col() != 0) {
 605                         cur.idx() -= cur.col();
 606                         cur.pos() = 0;
 607                 } else if (cur.idx() != 0) {
 608                         cur.idx() = 0;
 609                         cur.pos() = 0;
 610                 } else {
 611                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 612                         cur.undispatched();
 613                 }
 614                 break;
 615
 616         case LFUN_WORD_FORWARD:
 617         case LFUN_LINE_END:
 618                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 619         case LFUN_WORD_FORWARD_SELECT:
 620         case LFUN_LINE_END_SELECT:
 621                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 622                                 cmd.action == LFUN_LINE_END_SELECT);
 623                 cur.macroModeClose();
 624                 cur.clearTargetX();
 625                 if (cur.pos() != cur.lastpos()) {
 626                         cur.pos() = cur.lastpos();
 627                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 628                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 629                         cur.pos() = cur.lastpos();
 630                 } else if (cur.idx() != cur.lastidx()) {
 631                         cur.idx() = cur.lastidx();
 632                         cur.pos() = cur.lastpos();
 633                 } else {
 634                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 635                         cur.undispatched();
 636                 }
 637                 break;
 638
 639         case LFUN_SCREEN_UP_SELECT:
 640         case LFUN_SCREEN_UP:
 641                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 642                 cur.undispatched();
 643                 break;
 644
 645         case LFUN_SCREEN_DOWN_SELECT:
 646         case LFUN_SCREEN_DOWN:
 647                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 648                 cur.undispatched();
 649                 break;
 650
 651         case LFUN_CELL_FORWARD:
 652                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 653                 cur.inset().idxNext(cur);
 654                 break;
 655
 656         case LFUN_CELL_BACKWARD:
 657                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 658                 cur.inset().idxPrev(cur);
 659                 break;
 660
 661         case LFUN_WORD_DELETE_BACKWARD:
 662         case LFUN_CHAR_DELETE_BACKWARD:
 663                 if (cur.pos() == 0)
 664                         // May affect external cell:
 665                         recordUndoInset(cur, Undo::ATOMIC);
 666                 else
 667                         recordUndo(cur, Undo::ATOMIC);
 668                 // if the inset can not be removed from within, delete it
 669                 if (!cur.backspace()) {
 670                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 671                         cur.innerText()->dispatch(cur, cmd);
 672                 }
 673                 break;
 674
 675         case LFUN_WORD_DELETE_FORWARD:
 676         case LFUN_CHAR_DELETE_FORWARD:
 677                 if (cur.pos() == cur.lastpos())
 678                         // May affect external cell:
 679                         recordUndoInset(cur, Undo::ATOMIC);
 680                 else
 681                         recordUndo(cur, Undo::ATOMIC);
 682                 // if the inset can not be removed from within, delete it
 683                 if (!cur.erase()) {
 684                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 685                         cur.innerText()->dispatch(cur, cmd);
 686                 }
 687                 break;
 688
 689         case LFUN_ESCAPE:
 690                 if (cur.selection())
 691                         cur.clearSelection();
 692                 else  {
 693                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 694                         cur.undispatched();
 695                 }
 696                 break;
 697
 698         case LFUN_INSET_TOGGLE:
 699                 recordUndo(cur);
 700                 lock(!lock());
 701                 cur.popRight();
 702                 break;
 703
 704         case LFUN_SELF_INSERT:
 705                 if (cmd.argument().size() != 1) {
 706                         recordUndo(cur);
 707                         docstring const arg = cmd.argument();
 708                         if (!interpretString(cur, arg))
 709                                 cur.insert(arg);
 710                         break;
 711                 }
 712                 // Don't record undo steps if we are in macro mode and
 713                 // cmd.argument is the next character of the macro name.
 714                 // Otherwise we'll get an invalid cursor if we undo after
 715                 // the macro was finished and the macro is a known command,
 716                 // e.g. sqrt. LCursor::macroModeClose replaces in this case
 717                 // the InsetMathUnknown with name "frac" by an empty
 718                 // InsetMathFrac -> a pos value > 0 is invalid.
 719                 // A side effect is that an undo before the macro is finished
 720                 // undoes the complete macro, not only the last character.
 721                 if (!cur.inMacroMode())
 722                         recordUndo(cur);
 723
 724                 // spacial handling of space. If we insert an inset
 725                 // via macro mode, we want to put the cursor inside it
 726                 // if relevant. Think typing "\frac<space>".
 727                 if (cmd.argument()[0] == ' '
 728                     && cur.inMacroMode() && cur.macroName() != "\\"
 729                     && cur.macroModeClose()) {
 730                         MathAtom const atom = cur.prevAtom();
 731                         if (atom->asNestInset() && atom->nargs() > 0) {
 732                                 cur.posLeft();
 733                                 cur.pushLeft(*cur.nextInset());
 734                         }
 735                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 736                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 737                         cur.undispatched();
 738                 }
 739                 break;
 740
 741         //case LFUN_SERVER_GET_XY:
 742         //      sprintf(dispatch_buffer, "%d %d",);
 743         //      break;
 744
 745         case LFUN_SERVER_SET_XY: {
 746                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 747                 int x = 0;
 748                 int y = 0;
 749                 istringstream is(to_utf8(cmd.argument()));
 750                 is >> x >> y;
 751                 cur.setScreenPos(x, y);
 752                 break;
 753         }
 754
 755         // Special casing for superscript in case of LyX handling
 756         // dead-keys:
 757         case LFUN_ACCENT_CIRCUMFLEX:
 758                 if (cmd.argument().empty()) {
 759                         // do superscript if LyX handles
 760                         // deadkeys
 761                         recordUndo(cur, Undo::ATOMIC);
 762                         script(cur, true, grabAndEraseSelection(cur));
 763                 }
 764                 break;
 765
 766         case LFUN_ACCENT_UMLAUT:
 767         case LFUN_ACCENT_ACUTE:
 768         case LFUN_ACCENT_GRAVE:
 769         case LFUN_ACCENT_BREVE:
 770         case LFUN_ACCENT_DOT:
 771         case LFUN_ACCENT_MACRON:
 772         case LFUN_ACCENT_CARON:
 773         case LFUN_ACCENT_TILDE:
 774         case LFUN_ACCENT_CEDILLA:
 775         case LFUN_ACCENT_CIRCLE:
 776         case LFUN_ACCENT_UNDERDOT:
 777         case LFUN_ACCENT_TIE:
 778         case LFUN_ACCENT_OGONEK:
 779         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 780                 break;
 781
 782         //  Math fonts
 783         case LFUN_FONT_FREE_APPLY:
 784         case LFUN_FONT_FREE_UPDATE:
 785                 handleFont2(cur, cmd.argument());
 786                 break;
 787
 788         case LFUN_FONT_BOLD:
 789                 if (currentMode() == TEXT_MODE)
 790                         handleFont(cur, cmd.argument(), "textbf");
 791                 else
 792                         handleFont(cur, cmd.argument(), "mathbf");
 793                 break;
 794         case LFUN_FONT_SANS:
 795                 if (currentMode() == TEXT_MODE)
 796                         handleFont(cur, cmd.argument(), "textsf");
 797                 else
 798                         handleFont(cur, cmd.argument(), "mathsf");
 799                 break;
 800         case LFUN_FONT_EMPH:
 801                 if (currentMode() == TEXT_MODE)
 802                         handleFont(cur, cmd.argument(), "emph");
 803                 else
 804                         handleFont(cur, cmd.argument(), "mathcal");
 805                 break;
 806         case LFUN_FONT_ROMAN:
 807                 if (currentMode() == TEXT_MODE)
 808                         handleFont(cur, cmd.argument(), "textrm");
 809                 else
 810                         handleFont(cur, cmd.argument(), "mathrm");
 811                 break;
 812         case LFUN_FONT_CODE:
 813                 if (currentMode() == TEXT_MODE)
 814                         handleFont(cur, cmd.argument(), "texttt");
 815                 else
 816                         handleFont(cur, cmd.argument(), "mathtt");
 817                 break;
 818         case LFUN_FONT_FRAK:
 819                 handleFont(cur, cmd.argument(), "mathfrak");
 820                 break;
 821         case LFUN_FONT_ITAL:
 822                 if (currentMode() == TEXT_MODE)
 823                         handleFont(cur, cmd.argument(), "textit");
 824                 else
 825                         handleFont(cur, cmd.argument(), "mathit");
 826                 break;
 827         case LFUN_FONT_NOUN:
 828                 if (currentMode() == TEXT_MODE)
 829                         // FIXME: should be "noun"
 830                         handleFont(cur, cmd.argument(), "textsc");
 831                 else
 832                         handleFont(cur, cmd.argument(), "mathbb");
 833                 break;
 834         /*
 835         case LFUN_FONT_FREE_APPLY:
 836                 handleFont(cur, cmd.argument(), "textrm");
 837                 break;
 838         */
 839         case LFUN_FONT_DEFAULT:
 840                 handleFont(cur, cmd.argument(), "textnormal");
 841                 break;
 842
 843         case LFUN_MATH_MODE: {
 844 #if 1
 845                 // ignore math-mode on when already in math mode
 846                 if (currentMode() == InsetBase::MATH_MODE && cmd.argument() == "on")
 847                         break;
 848                 cur.macroModeClose();
 849                 docstring const save_selection = grabAndEraseSelection(cur);
 850                 selClearOrDel(cur);
 851                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 852                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 853                 cur.posLeft();
 854                 cur.pushLeft(*cur.nextInset());
 855                 cur.niceInsert(save_selection);
 856 #else
 857                 if (currentMode() == InsetBase::TEXT_MODE) {
 858                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 859                         cur.message(_("create new math text environment ($...$)"));
 860                 } else {
 861                         handleFont(cur, cmd.argument(), "textrm");
 862                         cur.message(_("entered math text mode (textrm)"));
 863                 }
 864 #endif
 865                 break;
 866         }
 867
 868         case LFUN_MATH_SIZE:
 869 #if 0
 870                 recordUndo(cur);
 871                 cur.setSize(arg);
 872 #endif
 873                 break;
 874
 875         case LFUN_MATH_MATRIX: {
 876                 recordUndo(cur, Undo::ATOMIC);
 877                 unsigned int m = 1;
 878                 unsigned int n = 1;
 879                 docstring v_align;
 880                 docstring h_align;
 881                 idocstringstream is(cmd.argument());
 882                 is >> m >> n >> v_align >> h_align;
 883                 if (m < 1)
 884                         m = 1;
 885                 if (n < 1)
 886                         n = 1;
 887                 v_align += 'c';
 888                 cur.niceInsert(
 889                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 890                 break;
 891         }
 892
 893         case LFUN_MATH_DELIM: {
 894                 docstring ls;
 895                 docstring rs = support::split(cmd.argument(), ls, ' ');
 896                 // Reasonable default values
 897                 if (ls.empty())
 898                         ls = '(';
 899                 if (rs.empty())
 900                         rs = ')';
 901                 recordUndo(cur, Undo::ATOMIC);
 902                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 903                 break;
 904         }
 905
 906         case LFUN_MATH_BIGDELIM: {
 907                 docstring const lname  = from_utf8(cmd.getArg(0));
 908                 docstring const ldelim = from_utf8(cmd.getArg(1));
 909                 docstring const rname  = from_utf8(cmd.getArg(2));
 910                 docstring const rdelim = from_utf8(cmd.getArg(3));
 911                 latexkeys const * l = in_word_set(lname);
 912                 bool const have_l = l && l->inset == "big" &&
 913                                     InsetMathBig::isBigInsetDelim(ldelim);
 914                 l = in_word_set(rname);
 915                 bool const have_r = l && l->inset == "big" &&
 916                                     InsetMathBig::isBigInsetDelim(rdelim);
 917                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 918                 // or right delimiter.
 919                 if (have_l || have_r) {
 920                         recordUndo(cur, Undo::ATOMIC);
 921                         docstring const selection = grabAndEraseSelection(cur);
 922                         selClearOrDel(cur);
 923                         if (have_l)
 924                                 cur.insert(MathAtom(new InsetMathBig(lname,
 925                                                                 ldelim)));
 926                         cur.niceInsert(selection);
 927                         if (have_r)
 928                                 cur.insert(MathAtom(new InsetMathBig(rname,
 929                                                                 rdelim)));
 930                 }
 931                 // Don't call cur.undispatched() if we did nothing, this would
 932                 // lead to infinite recursion via LyXText::dispatch().
 933                 break;
 934         }
 935
 936         case LFUN_SPACE_INSERT:
 937         case LFUN_MATH_SPACE:
 938                 recordUndo(cur, Undo::ATOMIC);
 939                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 940                 break;
 941
 942         case LFUN_ERT_INSERT:
 943                 // interpret this as if a backslash was typed
 944                 recordUndo(cur, Undo::ATOMIC);
 945                 interpretChar(cur, '\\');
 946                 break;
 947
 948         case LFUN_MATH_SUBSCRIPT:
 949                 // interpret this as if a _ was typed
 950                 recordUndo(cur, Undo::ATOMIC);
 951                 interpretChar(cur, '_');
 952                 break;
 953
 954         case LFUN_MATH_SUPERSCRIPT:
 955                 // interpret this as if a ^ was typed
 956                 recordUndo(cur, Undo::ATOMIC);
 957                 interpretChar(cur, '^');
 958                 break;
 959
 960         case LFUN_QUOTE_INSERT:
 961                 // interpret this as if a straight " was typed
 962                 recordUndo(cur, Undo::ATOMIC);
 963                 interpretChar(cur, '\"');
 964                 break;
 965
 966 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 967 // handling such that "self-insert" works on "arbitrary stuff" too, and
 968 // math-insert only handles special math things like "matrix".
 969         case LFUN_MATH_INSERT: {
 970                 recordUndo(cur, Undo::ATOMIC);
 971                 if (cmd.argument() == "^" || cmd.argument() == "_") {
 972                         interpretChar(cur, cmd.argument()[0]);
 973                 } else
 974                         cur.niceInsert(cmd.argument());
 975                 break;
 976                 }
 977
 978         case LFUN_DIALOG_SHOW_NEW_INSET: {
 979                 docstring const & name = cmd.argument();
 980                 string data;
 981                 if (name == "ref") {
 982                         RefInset tmp(name);
 983                         data = tmp.createDialogStr(to_utf8(name));
 984                 }
 985                 cur.bv().showInsetDialog(to_utf8(name), data, 0);
 986                 break;
 987         }
 988
 989         case LFUN_INSET_INSERT: {
 990                 MathArray ar;
 991                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
 992                         recordUndo(cur);
 993                         cur.insert(ar);
 994                 } else
 995                         cur.undispatched();
 996                 break;
 997         }
 998
 999         default:
1000                 InsetMathDim::doDispatch(cur, cmd);
1001                 break;
1002         }
1003 }
1004
1005
1006 bool InsetMathNest::getStatus(LCursor & cur, FuncRequest const & cmd,
1007                 FuncStatus & flag) const
1008 {
1009         // the font related toggles
1010         //string tc = "mathnormal";
1011         bool ret = true;
1012         string const arg = to_utf8(cmd.argument());
1013         switch (cmd.action) {
1014         case LFUN_TABULAR_FEATURE:
1015                 flag.enabled(false);
1016                 break;
1017 #if 0
1018         case LFUN_TABULAR_FEATURE:
1019                 // FIXME: check temporarily disabled
1020                 // valign code
1021                 char align = mathcursor::valign();
1022                 if (align == '\0') {
1023                         enable = false;
1024                         break;
1025                 }
1026                 if (cmd.argument().empty()) {
1027                         flag.clear();
1028                         break;
1029                 }
1030                 if (!contains("tcb", cmd.argument()[0])) {
1031                         enable = false;
1032                         break;
1033                 }
1034                 flag.setOnOff(cmd.argument()[0] == align);
1035                 break;
1036 #endif
1037         /// We have to handle them since 1.4 blocks all unhandled actions
1038         case LFUN_FONT_ITAL:
1039         case LFUN_FONT_BOLD:
1040         case LFUN_FONT_SANS:
1041         case LFUN_FONT_EMPH:
1042         case LFUN_FONT_CODE:
1043         case LFUN_FONT_NOUN:
1044         case LFUN_FONT_ROMAN:
1045         case LFUN_FONT_DEFAULT:
1046                 flag.enabled(true);
1047                 break;
1048         case LFUN_MATH_MUTATE:
1049                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1050                 flag.setOnOff(false);
1051                 break;
1052
1053         // we just need to be in math mode to enable that
1054         case LFUN_MATH_SIZE:
1055         case LFUN_MATH_SPACE:
1056         case LFUN_MATH_LIMITS:
1057         case LFUN_MATH_NONUMBER:
1058         case LFUN_MATH_NUMBER:
1059         case LFUN_MATH_EXTERN:
1060                 flag.enabled(true);
1061                 break;
1062
1063         case LFUN_FONT_FRAK:
1064                 flag.enabled(currentMode() != TEXT_MODE);
1065                 break;
1066
1067         case LFUN_MATH_INSERT: {
1068                 bool const textarg =
1069                         arg == "\\textbf"   || arg == "\\textsf" ||
1070                         arg == "\\textrm"   || arg == "\\textmd" ||
1071                         arg == "\\textit"   || arg == "\\textsc" ||
1072                         arg == "\\textsl"   || arg == "\\textup" ||
1073                         arg == "\\texttt"   || arg == "\\textbb" ||
1074                         arg == "\\textnormal";
1075                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1076                 break;
1077         }
1078
1079         case LFUN_MATH_MATRIX:
1080                 flag.enabled(currentMode() == MATH_MODE);
1081                 break;
1082
1083         case LFUN_INSET_INSERT: {
1084                 // Don't test createMathInset_fromDialogStr(), since
1085                 // getStatus is not called with a valid reference and the
1086                 // dialog would not be applyable.
1087                 string const name = cmd.getArg(0);
1088                 flag.enabled(name == "ref");
1089                 break;
1090         }
1091
1092         case LFUN_MATH_DELIM:
1093         case LFUN_MATH_BIGDELIM:
1094                 // Don't do this with multi-cell selections
1095                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1096                 break;
1097
1098         default:
1099                 ret = false;
1100                 break;
1101         }
1102         return ret;
1103 }
1104
1105
1106 void InsetMathNest::edit(LCursor & cur, bool left)
1107 {
1108         cur.push(*this);
1109         cur.idx() = left ? 0 : cur.lastidx();
1110         cur.pos() = left ? 0 : cur.lastpos();
1111         cur.resetAnchor();
1112         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1113 }
1114
1115
1116 InsetBase * InsetMathNest::editXY(LCursor & cur, int x, int y)
1117 {
1118         int idx_min = 0;
1119         int dist_min = 1000000;
1120         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1121                 int const d = cell(i).dist(cur.bv(), x, y);
1122                 if (d < dist_min) {
1123                         dist_min = d;
1124                         idx_min = i;
1125                 }
1126         }
1127         MathArray & ar = cell(idx_min);
1128         cur.push(*this);
1129         cur.idx() = idx_min;
1130         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1131
1132         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1133         if (dist_min == 0) {
1134                 // hit inside cell
1135                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1136                         if (ar[i]->covers(cur.bv(), x, y))
1137                                 return ar[i].nucleus()->editXY(cur, x, y);
1138         }
1139         return this;
1140 }
1141
1142
1143 void InsetMathNest::lfunMousePress(LCursor & cur, FuncRequest & cmd)
1144 {
1145         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1146         BufferView & bv = cur.bv();
1147         if (cmd.button() == mouse_button::button1) {
1148                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1149                 bv.mouseSetCursor(cur);
1150                 // Update the cursor update flags as needed:
1151                 //
1152                 // Update::Decoration: tells to update the decoration (visual box
1153                 //                     corners that define the inset)/
1154                 // Update::FitCursor: adjust the screen to the cursor position if
1155                 //                    needed
1156                 // cur.result().update(): don't overwrite previously set flags.
1157                 cur.updateFlags(Update::Decoration | Update::FitCursor | cur.result().update());
1158         } else if (cmd.button() == mouse_button::button2) {
1159                 MathArray ar;
1160                 if (cap::selection()) {
1161                         // See comment in LyXText::dispatch why we do this
1162                         cap::copySelectionToStack();
1163                         cmd = FuncRequest(LFUN_PASTE, "0");
1164                         doDispatch(cur, cmd);
1165                 } else
1166                         asArray(theSelection().get(), ar);
1167
1168                 cur.insert(ar);
1169                 bv.mouseSetCursor(cur);
1170         }
1171 }
1172
1173
1174 void InsetMathNest::lfunMouseMotion(LCursor & cur, FuncRequest & cmd)
1175 {
1176         // only select with button 1
1177         if (cmd.button() == mouse_button::button1) {
1178                 LCursor & bvcur = cur.bv().cursor();
1179                 if (bvcur.anchor_.hasPart(cur)) {
1180                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1181                         bvcur.setCursor(cur);
1182                         bvcur.selection() = true;
1183                         //lyxerr << "MOTION " << bvcur << endl;
1184                 } else
1185                         cur.undispatched();
1186         }
1187 }
1188
1189
1190 void InsetMathNest::lfunMouseRelease(LCursor & cur, FuncRequest & cmd)
1191 {
1192         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1193
1194         if (cmd.button() == mouse_button::button1) {
1195                 if (!cur.selection())
1196                         cur.noUpdate();
1197                 else {
1198                         LCursor & bvcur = cur.bv().cursor();
1199                         bvcur.selection() = true;
1200                         cap::saveSelection(bvcur);
1201                 }
1202                 return;
1203         }
1204
1205         if (cmd.button() == mouse_button::button3) {
1206                 // try to dispatch to enclosed insets first
1207                 cur.bv().showDialog("mathpanel");
1208                 return;
1209         }
1210
1211         cur.undispatched();
1212 }
1213
1214
1215 bool InsetMathNest::interpretChar(LCursor & cur, char_type c)
1216 {
1217         //lyxerr << "interpret 2: '" << c << "'" << endl;
1218         docstring save_selection;
1219         if (c == '^' || c == '_')
1220                 save_selection = grabAndEraseSelection(cur);
1221
1222         cur.clearTargetX();
1223
1224         // handle macroMode
1225         if (cur.inMacroMode()) {
1226                 docstring name = cur.macroName();
1227
1228                 /// are we currently typing '#1' or '#2' or...?
1229                 if (name == "\\#") {
1230                         cur.backspace();
1231                         int n = c - '0';
1232                         if (n >= 1 && n <= 9)
1233                                 cur.insert(new MathMacroArgument(n));
1234                         return true;
1235                 }
1236
1237                 if (isAlphaASCII(c)) {
1238                         cur.activeMacro()->setName(name + docstring(1, c));
1239                         return true;
1240                 }
1241
1242                 // handle 'special char' macros
1243                 if (name == "\\") {
1244                         // remove the '\\'
1245                         if (c == '\\') {
1246                                 cur.backspace();
1247                                 if (currentMode() == InsetMath::TEXT_MODE)
1248                                         cur.niceInsert(createInsetMath("textbackslash"));
1249                                 else
1250                                         cur.niceInsert(createInsetMath("backslash"));
1251                         } else if (c == '{') {
1252                                 cur.backspace();
1253                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1254                         } else if (c == '%') {
1255                                 cur.backspace();
1256                                 cur.niceInsert(MathAtom(new InsetMathComment));
1257                         } else if (c == '#') {
1258                                 BOOST_ASSERT(cur.activeMacro());
1259                                 cur.activeMacro()->setName(name + docstring(1, c));
1260                         } else {
1261                                 cur.backspace();
1262                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1263                         }
1264                         return true;
1265                 }
1266
1267                 // One character big delimiters. The others are handled in
1268                 // interpretString().
1269                 latexkeys const * l = in_word_set(name.substr(1));
1270                 if (name[0] == '\\' && l && l->inset == "big") {
1271                         docstring delim;
1272                         switch (c) {
1273                         case '{':
1274                                 delim = from_ascii("\\{");
1275                                 break;
1276                         case '}':
1277                                 delim = from_ascii("\\}");
1278                                 break;
1279                         default:
1280                                 delim = docstring(1, c);
1281                                 break;
1282                         }
1283                         if (InsetMathBig::isBigInsetDelim(delim)) {
1284                                 // name + delim ared a valid InsetMathBig.
1285                                 // We can't use cur.macroModeClose() because
1286                                 // it does not handle delim.
1287                                 InsetMathUnknown * p = cur.activeMacro();
1288                                 p->finalize();
1289                                 --cur.pos();
1290                                 cur.cell().erase(cur.pos());
1291                                 cur.plainInsert(MathAtom(
1292                                         new InsetMathBig(name.substr(1), delim)));
1293                                 return true;
1294                         }
1295                 }
1296
1297                 // leave macro mode and try again if necessary
1298                 cur.macroModeClose();
1299                 if (c == '{')
1300                         cur.niceInsert(MathAtom(new InsetMathBrace));
1301                 else if (c != ' ')
1302                         interpretChar(cur, c);
1303                 return true;
1304         }
1305
1306         // This is annoying as one has to press <space> far too often.
1307         // Disable it.
1308
1309 #if 0
1310                 // leave autocorrect mode if necessary
1311                 if (autocorrect() && c == ' ') {
1312                         autocorrect() = false;
1313                         return true;
1314                 }
1315 #endif
1316
1317         // just clear selection on pressing the space bar
1318         if (cur.selection() && c == ' ') {
1319                 cur.selection() = false;
1320                 return true;
1321         }
1322
1323         selClearOrDel(cur);
1324
1325         if (c == '\\') {
1326                 //lyxerr << "starting with macro" << endl;
1327                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1328                 return true;
1329         }
1330
1331         if (c == '\n') {
1332                 if (currentMode() == InsetMath::TEXT_MODE)
1333                         cur.insert(c);
1334                 return true;
1335         }
1336
1337         if (c == ' ') {
1338                 if (currentMode() == InsetMath::TEXT_MODE) {
1339                         // insert spaces in text mode,
1340                         // but suppress direct insertion of two spaces in a row
1341                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1342                         // it is better than nothing...
1343                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ') {
1344                                 cur.insert(c);
1345                                 // FIXME: we have to enable full redraw here because of the
1346                                 // visual box corners that define the inset. If we know for
1347                                 // sure that we stay within the same cell we can optimize for
1348                                 // that using:
1349                                 //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1350                         }
1351                         return true;
1352                 }
1353                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1354                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1355                         // FIXME: we have to enable full redraw here because of the
1356                         // visual box corners that define the inset. If we know for
1357                         // sure that we stay within the same cell we can optimize for
1358                         // that using:
1359                         //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1360                         return true;
1361                 }
1362
1363                 if (cur.popRight()) {
1364                         // FIXME: we have to enable full redraw here because of the
1365                         // visual box corners that define the inset. If we know for
1366                         // sure that we stay within the same cell we can optimize for
1367                         // that using:
1368                         //cur.updateFlags(Update::FitCursor);
1369                         return true;
1370                 }
1371
1372                 // if we are at the very end, leave the formula
1373                 return cur.pos() != cur.lastpos();
1374         }
1375
1376         // These shouldn't work in text mode:
1377         if (currentMode() != InsetMath::TEXT_MODE) {
1378                 if (c == '_') {
1379                         script(cur, false, save_selection);
1380                         return true;
1381                 }
1382                 if (c == '^') {
1383                         script(cur, true, save_selection);
1384                         return true;
1385                 }
1386                 if (c == '~') {
1387                         cur.niceInsert(createInsetMath("sim"));
1388                         return true;
1389                 }
1390         }
1391
1392         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1393             c == '%' || c == '_' || c == '^') {
1394                 cur.niceInsert(createInsetMath(docstring(1, c)));
1395                 return true;
1396         }
1397
1398
1399         // try auto-correction
1400         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1401         //      return true;
1402
1403         // no special circumstances, so insert the character without any fuss
1404         cur.insert(c);
1405         cur.autocorrect() = true;
1406         return true;
1407 }
1408
1409
1410 bool InsetMathNest::interpretString(LCursor & cur, docstring const & str)
1411 {
1412         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1413         // possible
1414         if (!cur.empty() && cur.pos() > 0 &&
1415             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1416                 if (InsetMathBig::isBigInsetDelim(str)) {
1417                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1418                         if (prev[0] == '\\') {
1419                                 prev = prev.substr(1);
1420                                 latexkeys const * l = in_word_set(prev);
1421                                 if (l && l->inset == "big") {
1422                                         cur.cell()[cur.pos() - 1] =
1423                                                 MathAtom(new InsetMathBig(prev, str));
1424                                         return true;
1425                                 }
1426                         }
1427                 }
1428         }
1429         return false;
1430 }
1431
1432
1433 bool InsetMathNest::script(LCursor & cur, bool up,
1434                 docstring const & save_selection)
1435 {
1436         // Hack to get \^ and \_ working
1437         //lyxerr << "handling script: up: " << up << endl;
1438         if (cur.inMacroMode() && cur.macroName() == "\\") {
1439                 if (up)
1440                         cur.niceInsert(createInsetMath("mathcircumflex"));
1441                 else
1442                         interpretChar(cur, '_');
1443                 return true;
1444         }
1445
1446         cur.macroModeClose();
1447         if (asScriptInset() && cur.idx() == 0) {
1448                 // we are in a nucleus of a script inset, move to _our_ script
1449                 InsetMathScript * inset = asScriptInset();
1450                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1451                 inset->ensure(up);
1452                 cur.idx() = inset->idxOfScript(up);
1453                 cur.pos() = 0;
1454         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1455                 --cur.pos();
1456                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1457                 cur.push(*inset);
1458                 inset->ensure(up);
1459                 cur.idx() = inset->idxOfScript(up);
1460                 cur.pos() = cur.lastpos();
1461         } else {
1462                 // convert the thing to our left to a scriptinset or create a new
1463                 // one if in the very first position of the array
1464                 if (cur.pos() == 0) {
1465                         //lyxerr << "new scriptinset" << endl;
1466                         cur.insert(new InsetMathScript(up));
1467                 } else {
1468                         //lyxerr << "converting prev atom " << endl;
1469                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1470                 }
1471                 --cur.pos();
1472                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1473                 // See comment in MathParser.C for special handling of {}-bases
1474
1475                 cur.push(*inset);
1476                 cur.idx() = 1;
1477                 cur.pos() = 0;
1478         }
1479         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1480         cur.niceInsert(save_selection);
1481         cur.resetAnchor();
1482         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1483         return true;
1484 }
1485
1486
1487 } // namespace lyx