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