src/mathed/InsetMathNest.cpp

   1 /**
   2  * \file InsetMathNest.cpp
   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 "InsetMathDelim.h"
  22 #include "InsetMathHull.h"
  23 //#include "InsetMathMBox.h"
  24 #include "InsetMathRef.h"
  25 #include "InsetMathScript.h"
  26 #include "InsetMathSpace.h"
  27 #include "InsetMathSymbol.h"
  28 #include "InsetMathUnknown.h"
  29 #include "MathData.h"
  30 #include "MathFactory.h"
  31 #include "MathMacroArgument.h"
  32 #include "MathParser.h"
  33 #include "MathStream.h"
  34 #include "MathSupport.h"
  35
  36 #include "Bidi.h"
  37 #include "BufferView.h"
  38 #include "Color.h"
  39 #include "CoordCache.h"
  40 #include "Cursor.h"
  41 #include "CutAndPaste.h"
  42 #include "debug.h"
  43 #include "DispatchResult.h"
  44 #include "FuncRequest.h"
  45 #include "FuncStatus.h"
  46 #include "gettext.h"
  47 #include "Text.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
  60 #include <sstream>
  61
  62
  63 namespace lyx {
  64
  65 using cap::copySelection;
  66 using cap::grabAndEraseSelection;
  67 using cap::cutSelection;
  68 using cap::replaceSelection;
  69 using cap::selClearOrDel;
  70
  71 using std::endl;
  72 using std::string;
  73 using std::istringstream;
  74
  75
  76 InsetMathNest::InsetMathNest(idx_type nargs)
  77         : cells_(nargs), lock_(false), mouse_hover_(false)
  78 {}
  79
  80
  81 InsetMathNest::InsetMathNest(InsetMathNest const & inset)
  82         : InsetMath(inset), cells_(inset.cells_), lock_(inset.lock_),
  83           mouse_hover_(false)
  84 {}
  85
  86
  87 InsetMathNest & InsetMathNest::operator=(InsetMathNest const & inset)
  88 {
  89         cells_ = inset.cells_;
  90         lock_ = inset.lock_;
  91         mouse_hover_ = false;
  92         InsetMath::operator=(inset);
  93         return *this;
  94 }
  95
  96
  97 InsetMath::idx_type InsetMathNest::nargs() const
  98 {
  99         return cells_.size();
 100 }
 101
 102
 103 void InsetMathNest::cursorPos(BufferView const & bv,
 104                 CursorSlice const & sl, bool /*boundary*/,
 105                 int & x, int & y) const
 106 {
 107 // FIXME: This is a hack. Ideally, the coord cache should not store
 108 // absolute positions, but relative ones. This would mean to call
 109 // setXY() not in MathData::draw(), but in the parent insets' draw()
 110 // with the correctly adjusted x,y values. But this means that we'd have
 111 // to touch all (math)inset's draw() methods. Right now, we'll store
 112 // absolute value, and make them here relative, only to make them
 113 // absolute again when actually drawing the cursor. What a mess.
 114         BOOST_ASSERT(ptr_cmp(&sl.inset(), this));
 115         MathData const & ar = sl.cell();
 116         CoordCache const & coord_cache = bv.coordCache();
 117         if (!coord_cache.getArrays().has(&ar)) {
 118                 // this can (semi-)legally happen if we just created this cell
 119                 // and it never has been drawn before. So don't ASSERT.
 120                 //lyxerr << "no cached data for array " << &ar << endl;
 121                 x = 0;
 122                 y = 0;
 123                 return;
 124         }
 125         Point const pt = coord_cache.getArrays().xy(&ar);
 126         if (!coord_cache.getInsets().has(this)) {
 127                 // same as above
 128                 //lyxerr << "no cached data for inset " << this << endl;
 129                 x = 0;
 130                 y = 0;
 131                 return;
 132         }
 133         Point const pt2 = coord_cache.getInsets().xy(this);
 134         //lyxerr << "retrieving position cache for MathData "
 135         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 136         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 137         y = pt.y_ - pt2.y_;
 138 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 139 //              << " asc: " << ascent() << "  des: " << descent()
 140 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 141         // move cursor visually into empty cells ("blue rectangles");
 142         if (ar.empty())
 143                 x += 2;
 144 }
 145
 146
 147 void InsetMathNest::metrics(MetricsInfo const & mi) const
 148 {
 149         MetricsInfo m = mi;
 150         for (idx_type i = 0, n = nargs(); i != n; ++i) {
 151                 Dimension dim;
 152                 cell(i).metrics(m, dim);
 153         }
 154 }
 155
 156
 157 bool InsetMathNest::idxNext(Cursor & cur) const
 158 {
 159         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 160         if (cur.idx() == cur.lastidx())
 161                 return false;
 162         ++cur.idx();
 163         cur.pos() = 0;
 164         return true;
 165 }
 166
 167
 168 bool InsetMathNest::idxRight(Cursor & cur) const
 169 {
 170         return idxNext(cur);
 171 }
 172
 173
 174 bool InsetMathNest::idxPrev(Cursor & cur) const
 175 {
 176         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 177         if (cur.idx() == 0)
 178                 return false;
 179         --cur.idx();
 180         cur.pos() = cur.lastpos();
 181         return true;
 182 }
 183
 184
 185 bool InsetMathNest::idxLeft(Cursor & cur) const
 186 {
 187         return idxPrev(cur);
 188 }
 189
 190
 191 bool InsetMathNest::idxFirst(Cursor & cur) const
 192 {
 193         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 194         if (nargs() == 0)
 195                 return false;
 196         cur.idx() = 0;
 197         cur.pos() = 0;
 198         return true;
 199 }
 200
 201
 202 bool InsetMathNest::idxLast(Cursor & cur) const
 203 {
 204         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 205         if (nargs() == 0)
 206                 return false;
 207         cur.idx() = cur.lastidx();
 208         cur.pos() = cur.lastpos();
 209         return true;
 210 }
 211
 212
 213 void InsetMathNest::dump() const
 214 {
 215         odocstringstream oss;
 216         WriteStream os(oss);
 217         os << "---------------------------------------------\n";
 218         write(os);
 219         os << "\n";
 220         for (idx_type i = 0, n = nargs(); i != n; ++i)
 221                 os << cell(i) << "\n";
 222         os << "---------------------------------------------\n";
 223         lyxerr << to_utf8(oss.str());
 224 }
 225
 226
 227 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 228 {
 229 #if 0
 230         if (lock_)
 231                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 232                                         Color::mathlockbg);
 233 #endif
 234         setPosCache(pi, x, y);
 235 }
 236
 237
 238 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 239 {
 240         BufferView & bv = *pi.base.bv;
 241         // this should use the x/y values given, not the cached values
 242         Cursor & cur = bv.cursor();
 243         if (!cur.selection())
 244                 return;
 245         if (!ptr_cmp(&cur.inset(), this))
 246                 return;
 247
 248         // FIXME: hack to get position cache warm
 249         pi.pain.setDrawingEnabled(false);
 250         draw(pi, x, y);
 251         pi.pain.setDrawingEnabled(true);
 252
 253         CursorSlice s1 = cur.selBegin();
 254         CursorSlice s2 = cur.selEnd();
 255
 256         //lyxerr << "InsetMathNest::drawing selection: "
 257         //      << " s1: " << s1 << " s2: " << s2 << endl;
 258         if (s1.idx() == s2.idx()) {
 259                 MathData const & c = cell(s1.idx());
 260                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 261                 int x1 = g.pos.x_ + c.pos2x(s1.pos());
 262                 int y1 = g.pos.y_ - g.dim.ascent();
 263                 int x2 = g.pos.x_ + c.pos2x(s2.pos());
 264                 int y2 = g.pos.y_ + g.dim.descent();
 265                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color::selection);
 266         //lyxerr << "InsetMathNest::drawing selection 3: "
 267         //      << " x1: " << x1 << " x2: " << x2
 268         //      << " y1: " << y1 << " y2: " << y2 << endl;
 269         } else {
 270                 for (idx_type i = 0; i < nargs(); ++i) {
 271                         if (idxBetween(i, s1.idx(), s2.idx())) {
 272                                 MathData const & c = cell(i);
 273                                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 274                                 int x1 = g.pos.x_;
 275                                 int y1 = g.pos.y_ - g.dim.ascent();
 276                                 int x2 = g.pos.x_ + g.dim.width();
 277                                 int y2 = g.pos.y_ + g.dim.descent();
 278                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color::selection);
 279                         }
 280                 }
 281         }
 282 }
 283
 284
 285 void InsetMathNest::validate(LaTeXFeatures & features) const
 286 {
 287         for (idx_type i = 0; i < nargs(); ++i)
 288                 cell(i).validate(features);
 289 }
 290
 291
 292 void InsetMathNest::replace(ReplaceData & rep)
 293 {
 294         for (idx_type i = 0; i < nargs(); ++i)
 295                 cell(i).replace(rep);
 296 }
 297
 298
 299 bool InsetMathNest::contains(MathData const & ar) const
 300 {
 301         for (idx_type i = 0; i < nargs(); ++i)
 302                 if (cell(i).contains(ar))
 303                         return true;
 304         return false;
 305 }
 306
 307
 308 bool InsetMathNest::lock() const
 309 {
 310         return lock_;
 311 }
 312
 313
 314 void InsetMathNest::lock(bool l)
 315 {
 316         lock_ = l;
 317 }
 318
 319
 320 bool InsetMathNest::isActive() const
 321 {
 322         return nargs() > 0;
 323 }
 324
 325
 326 MathData InsetMathNest::glue() const
 327 {
 328         MathData ar;
 329         for (size_t i = 0; i < nargs(); ++i)
 330                 ar.append(cell(i));
 331         return ar;
 332 }
 333
 334
 335 void InsetMathNest::write(WriteStream & os) const
 336 {
 337         os << '\\' << name().c_str();
 338         for (size_t i = 0; i < nargs(); ++i)
 339                 os << '{' << cell(i) << '}';
 340         if (nargs() == 0)
 341                 os.pendingSpace(true);
 342         if (lock_ && !os.latex()) {
 343                 os << "\\lyxlock";
 344                 os.pendingSpace(true);
 345         }
 346 }
 347
 348
 349 void InsetMathNest::normalize(NormalStream & os) const
 350 {
 351         os << '[' << name().c_str();
 352         for (size_t i = 0; i < nargs(); ++i)
 353                 os << ' ' << cell(i);
 354         os << ']';
 355 }
 356
 357
 358 int InsetMathNest::latex(Buffer const &, odocstream & os,
 359                         OutputParams const & runparams) const
 360 {
 361         WriteStream wi(os, runparams.moving_arg, true);
 362         write(wi);
 363         return wi.line();
 364 }
 365
 366
 367 bool InsetMathNest::setMouseHover(bool mouse_hover)
 368 {
 369         mouse_hover_ = mouse_hover;
 370         return true;
 371 }
 372
 373
 374 bool InsetMathNest::notifyCursorLeaves(Cursor & /*cur*/)
 375 {
 376         // FIXME: look here
 377 #if 0
 378         MathData & ar = cur.cell();
 379         // remove base-only "scripts"
 380         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 381                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 382                 if (p && p->nargs() == 1) {
 383                         MathData ar = p->nuc();
 384                         erase(i);
 385                         insert(i, ar);
 386                         cur.adjust(i, ar.size() - 1);
 387                 }
 388         }
 389
 390         // glue adjacent font insets of the same kind
 391         for (pos_type i = 0; i + 1 < size(); ++i) {
 392                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 393                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 394                 if (p && q && p->name() == q->name()) {
 395                         p->cell(0).append(q->cell(0));
 396                         erase(i + 1);
 397                         cur.adjust(i, -1);
 398                 }
 399         }
 400 #endif
 401         return false;
 402 }
 403
 404
 405 void InsetMathNest::handleFont
 406         (Cursor & cur, docstring const & arg, char const * const font)
 407 {
 408         handleFont(cur, arg, from_ascii(font));
 409 }
 410
 411
 412 void InsetMathNest::handleFont
 413         (Cursor & cur, docstring const & arg, docstring const & font)
 414 {
 415         // this whole function is a hack and won't work for incremental font
 416         // changes...
 417
 418         if (cur.inset().asInsetMath()->name() == font) {
 419                 recordUndoInset(cur, Undo::ATOMIC);
 420                 cur.handleFont(to_utf8(font));
 421         } else {
 422                 recordUndo(cur, Undo::ATOMIC);
 423                 cur.handleNest(createInsetMath(font));
 424                 cur.insert(arg);
 425         }
 426 }
 427
 428
 429 void InsetMathNest::handleFont2(Cursor & cur, docstring const & arg)
 430 {
 431         recordUndo(cur, Undo::ATOMIC);
 432         Font font;
 433         bool b;
 434         font.fromString(to_utf8(arg), b);
 435         if (font.color() != Color::inherit) {
 436                 MathAtom at = MathAtom(new InsetMathColor(true, font.color()));
 437                 cur.handleNest(at, 0);
 438         }
 439 }
 440
 441
 442 void InsetMathNest::doDispatch(Cursor & cur, FuncRequest & cmd)
 443 {
 444         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 445         //CursorSlice sl = cur.current();
 446
 447         switch (cmd.action) {
 448
 449         case LFUN_PASTE: {
 450                 recordUndo(cur);
 451                 cur.message(_("Paste"));
 452                 replaceSelection(cur);
 453                 docstring topaste;
 454                 if (cmd.argument().empty() && !theClipboard().isInternal())
 455                         topaste = theClipboard().getAsText();
 456                 else {
 457                         size_t n = 0;
 458                         idocstringstream is(cmd.argument());
 459                         is >> n;
 460                         topaste = cap::getSelection(cur.buffer(), n);
 461                 }
 462                 cur.niceInsert(topaste);
 463                 cur.clearSelection(); // bug 393
 464                 finishUndo();
 465                 break;
 466         }
 467
 468         case LFUN_CUT:
 469                 recordUndo(cur);
 470                 cutSelection(cur, true, true);
 471                 cur.message(_("Cut"));
 472                 // Prevent stale position >= size crash
 473                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 474                 cur.normalize();
 475                 break;
 476
 477         case LFUN_COPY:
 478                 copySelection(cur);
 479                 cur.message(_("Copy"));
 480                 break;
 481
 482         case LFUN_MOUSE_PRESS:
 483                 lfunMousePress(cur, cmd);
 484                 break;
 485
 486         case LFUN_MOUSE_MOTION:
 487                 lfunMouseMotion(cur, cmd);
 488                 break;
 489
 490         case LFUN_MOUSE_RELEASE:
 491                 lfunMouseRelease(cur, cmd);
 492                 break;
 493
 494         case LFUN_FINISHED_LEFT:
 495                 cur.bv().cursor() = cur;
 496                 break;
 497
 498         case LFUN_FINISHED_RIGHT:
 499                 ++cur.pos();
 500                 cur.bv().cursor() = cur;
 501                 break;
 502
 503         case LFUN_CHAR_FORWARD:
 504                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 505         case LFUN_CHAR_FORWARD_SELECT:
 506                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 507                 cur.autocorrect() = false;
 508                 cur.clearTargetX();
 509                 cur.macroModeClose();
 510                 if (reverseDirectionNeeded(cur))
 511                         goto goto_char_backwards;
 512
 513 goto_char_forwards:
 514                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 515                         cur.pushLeft(*cur.nextAtom().nucleus());
 516                         cur.inset().idxFirst(cur);
 517                 } else if (cur.posRight() || idxRight(cur)
 518                         || cur.popRight() || cur.selection())
 519                         ;
 520                 else {
 521                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 522                         cur.undispatched();
 523                 }
 524                 break;
 525
 526         case LFUN_CHAR_BACKWARD:
 527                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 528         case LFUN_CHAR_BACKWARD_SELECT:
 529                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 530                 cur.autocorrect() = false;
 531                 cur.clearTargetX();
 532                 cur.macroModeClose();
 533                 if (reverseDirectionNeeded(cur))
 534                         goto goto_char_forwards;
 535
 536 goto_char_backwards:
 537                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 538                         cur.posLeft();
 539                         cur.push(*cur.nextAtom().nucleus());
 540                         cur.inset().idxLast(cur);
 541                 } else if (cur.posLeft() || idxLeft(cur)
 542                         || cur.popLeft() || cur.selection())
 543                         ;
 544                 else {
 545                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 546                         cur.undispatched();
 547                 }
 548                 break;
 549
 550         case LFUN_DOWN:
 551         case LFUN_UP:
 552                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 553         case LFUN_DOWN_SELECT:
 554         case LFUN_UP_SELECT: {
 555                 // close active macro
 556                 if (cur.inMacroMode()) {
 557                         cur.macroModeClose();
 558                         break;
 559                 }
 560
 561                 // stop/start the selection
 562                 bool select = cmd.action == LFUN_DOWN_SELECT ||
 563                         cmd.action == LFUN_UP_SELECT;
 564                 cur.selHandle(select);
 565
 566                 // go up/down
 567                 bool up = cmd.action == LFUN_UP || cmd.action == LFUN_UP_SELECT;
 568                 bool successful = cur.upDownInMath(up);
 569                 if (successful) {
 570                         // notify left insets and give them chance to set update flags
 571                         lyx::notifyCursorLeaves(cur.beforeDispatchCursor(), cur);
 572                         cur.fixIfBroken();
 573                         break;
 574                 }
 575
 576                 if (cur.fixIfBroken())
 577                         // FIXME: Something bad happened. We pass the corrected Cursor
 578                         // instead of letting things go worse.
 579                         break;
 580
 581                 // We did not manage to move the cursor.
 582                 cur.undispatched();
 583                 break;
 584         }
 585
 586         case LFUN_MOUSE_DOUBLE:
 587         case LFUN_MOUSE_TRIPLE:
 588         case LFUN_WORD_SELECT:
 589                 cur.pos() = 0;
 590                 cur.idx() = 0;
 591                 cur.resetAnchor();
 592                 cur.selection() = true;
 593                 cur.pos() = cur.lastpos();
 594                 cur.idx() = cur.lastidx();
 595                 break;
 596
 597         case LFUN_PARAGRAPH_UP:
 598         case LFUN_PARAGRAPH_DOWN:
 599                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 600         case LFUN_PARAGRAPH_UP_SELECT:
 601         case LFUN_PARAGRAPH_DOWN_SELECT:
 602                 break;
 603
 604         case LFUN_LINE_BEGIN:
 605         case LFUN_WORD_BACKWARD:
 606                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 607         case LFUN_LINE_BEGIN_SELECT:
 608         case LFUN_WORD_BACKWARD_SELECT:
 609                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 610                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 611                 cur.macroModeClose();
 612                 if (cur.pos() != 0) {
 613                         cur.pos() = 0;
 614                 } else if (cur.col() != 0) {
 615                         cur.idx() -= cur.col();
 616                         cur.pos() = 0;
 617                 } else if (cur.idx() != 0) {
 618                         cur.idx() = 0;
 619                         cur.pos() = 0;
 620                 } else {
 621                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 622                         cur.undispatched();
 623                 }
 624                 break;
 625
 626         case LFUN_WORD_FORWARD:
 627         case LFUN_LINE_END:
 628                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 629         case LFUN_WORD_FORWARD_SELECT:
 630         case LFUN_LINE_END_SELECT:
 631                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 632                                 cmd.action == LFUN_LINE_END_SELECT);
 633                 cur.macroModeClose();
 634                 cur.clearTargetX();
 635                 if (cur.pos() != cur.lastpos()) {
 636                         cur.pos() = cur.lastpos();
 637                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 638                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 639                         cur.pos() = cur.lastpos();
 640                 } else if (cur.idx() != cur.lastidx()) {
 641                         cur.idx() = cur.lastidx();
 642                         cur.pos() = cur.lastpos();
 643                 } else {
 644                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 645                         cur.undispatched();
 646                 }
 647                 break;
 648
 649         case LFUN_SCREEN_UP_SELECT:
 650                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 651                 cur.undispatched();
 652                 break;
 653
 654         case LFUN_SCREEN_DOWN_SELECT:
 655                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 656                 cur.undispatched();
 657                 break;
 658
 659         case LFUN_CELL_FORWARD:
 660                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 661                 cur.inset().idxNext(cur);
 662                 break;
 663
 664         case LFUN_CELL_BACKWARD:
 665                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 666                 cur.inset().idxPrev(cur);
 667                 break;
 668
 669         case LFUN_WORD_DELETE_BACKWARD:
 670         case LFUN_CHAR_DELETE_BACKWARD:
 671                 if (cur.pos() == 0)
 672                         // May affect external cell:
 673                         recordUndoInset(cur, Undo::ATOMIC);
 674                 else
 675                         recordUndo(cur, Undo::ATOMIC);
 676                 // if the inset can not be removed from within, delete it
 677                 if (!cur.backspace()) {
 678                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 679                         cur.innerText()->dispatch(cur, cmd);
 680                 }
 681                 break;
 682
 683         case LFUN_WORD_DELETE_FORWARD:
 684         case LFUN_CHAR_DELETE_FORWARD:
 685                 if (cur.pos() == cur.lastpos())
 686                         // May affect external cell:
 687                         recordUndoInset(cur, Undo::ATOMIC);
 688                 else
 689                         recordUndo(cur, Undo::ATOMIC);
 690                 // if the inset can not be removed from within, delete it
 691                 if (!cur.erase()) {
 692                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 693                         cur.innerText()->dispatch(cur, cmd);
 694                 }
 695                 break;
 696
 697         case LFUN_ESCAPE:
 698                 if (cur.selection())
 699                         cur.clearSelection();
 700                 else  {
 701                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 702                         cur.undispatched();
 703                 }
 704                 break;
 705
 706         case LFUN_INSET_TOGGLE:
 707                 recordUndo(cur);
 708                 lock(!lock());
 709                 cur.popRight();
 710                 break;
 711
 712         case LFUN_SELF_INSERT:
 713                 if (cmd.argument().size() != 1) {
 714                         recordUndo(cur);
 715                         docstring const arg = cmd.argument();
 716                         if (!interpretString(cur, arg))
 717                                 cur.insert(arg);
 718                         break;
 719                 }
 720                 // Don't record undo steps if we are in macro mode and
 721                 // cmd.argument is the next character of the macro name.
 722                 // Otherwise we'll get an invalid cursor if we undo after
 723                 // the macro was finished and the macro is a known command,
 724                 // e.g. sqrt. Cursor::macroModeClose replaces in this case
 725                 // the InsetMathUnknown with name "frac" by an empty
 726                 // InsetMathFrac -> a pos value > 0 is invalid.
 727                 // A side effect is that an undo before the macro is finished
 728                 // undoes the complete macro, not only the last character.
 729                 if (!cur.inMacroMode())
 730                         recordUndo(cur);
 731
 732                 // spacial handling of space. If we insert an inset
 733                 // via macro mode, we want to put the cursor inside it
 734                 // if relevant. Think typing "\frac<space>".
 735                 if (cmd.argument()[0] == ' '
 736                     && cur.inMacroMode() && cur.macroName() != "\\"
 737                     && cur.macroModeClose()) {
 738                         MathAtom const atom = cur.prevAtom();
 739                         if (atom->asNestInset() && atom->isActive()) {
 740                                 cur.posLeft();
 741                                 cur.pushLeft(*cur.nextInset());
 742                         }
 743                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 744                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 745                         cur.undispatched();
 746                 }
 747                 break;
 748
 749         //case LFUN_SERVER_GET_XY:
 750         //      sprintf(dispatch_buffer, "%d %d",);
 751         //      break;
 752
 753         case LFUN_SERVER_SET_XY: {
 754                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 755                 int x = 0;
 756                 int y = 0;
 757                 istringstream is(to_utf8(cmd.argument()));
 758                 is >> x >> y;
 759                 cur.setScreenPos(x, y);
 760                 break;
 761         }
 762
 763         // Special casing for superscript in case of LyX handling
 764         // dead-keys:
 765         case LFUN_ACCENT_CIRCUMFLEX:
 766                 if (cmd.argument().empty()) {
 767                         // do superscript if LyX handles
 768                         // deadkeys
 769                         recordUndo(cur, Undo::ATOMIC);
 770                         script(cur, true, grabAndEraseSelection(cur));
 771                 }
 772                 break;
 773
 774         case LFUN_ACCENT_UMLAUT:
 775         case LFUN_ACCENT_ACUTE:
 776         case LFUN_ACCENT_GRAVE:
 777         case LFUN_ACCENT_BREVE:
 778         case LFUN_ACCENT_DOT:
 779         case LFUN_ACCENT_MACRON:
 780         case LFUN_ACCENT_CARON:
 781         case LFUN_ACCENT_TILDE:
 782         case LFUN_ACCENT_CEDILLA:
 783         case LFUN_ACCENT_CIRCLE:
 784         case LFUN_ACCENT_UNDERDOT:
 785         case LFUN_ACCENT_TIE:
 786         case LFUN_ACCENT_OGONEK:
 787         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 788                 break;
 789
 790         //  Math fonts
 791         case LFUN_FONT_FREE_APPLY:
 792         case LFUN_FONT_FREE_UPDATE:
 793                 handleFont2(cur, cmd.argument());
 794                 break;
 795
 796         case LFUN_FONT_BOLD:
 797                 if (currentMode() == TEXT_MODE)
 798                         handleFont(cur, cmd.argument(), "textbf");
 799                 else
 800                         handleFont(cur, cmd.argument(), "mathbf");
 801                 break;
 802         case LFUN_FONT_SANS:
 803                 if (currentMode() == TEXT_MODE)
 804                         handleFont(cur, cmd.argument(), "textsf");
 805                 else
 806                         handleFont(cur, cmd.argument(), "mathsf");
 807                 break;
 808         case LFUN_FONT_EMPH:
 809                 if (currentMode() == TEXT_MODE)
 810                         handleFont(cur, cmd.argument(), "emph");
 811                 else
 812                         handleFont(cur, cmd.argument(), "mathcal");
 813                 break;
 814         case LFUN_FONT_ROMAN:
 815                 if (currentMode() == TEXT_MODE)
 816                         handleFont(cur, cmd.argument(), "textrm");
 817                 else
 818                         handleFont(cur, cmd.argument(), "mathrm");
 819                 break;
 820         case LFUN_FONT_TYPEWRITER:
 821                 if (currentMode() == TEXT_MODE)
 822                         handleFont(cur, cmd.argument(), "texttt");
 823                 else
 824                         handleFont(cur, cmd.argument(), "mathtt");
 825                 break;
 826         case LFUN_FONT_FRAK:
 827                 handleFont(cur, cmd.argument(), "mathfrak");
 828                 break;
 829         case LFUN_FONT_ITAL:
 830                 if (currentMode() == TEXT_MODE)
 831                         handleFont(cur, cmd.argument(), "textit");
 832                 else
 833                         handleFont(cur, cmd.argument(), "mathit");
 834                 break;
 835         case LFUN_FONT_NOUN:
 836                 if (currentMode() == TEXT_MODE)
 837                         // FIXME: should be "noun"
 838                         handleFont(cur, cmd.argument(), "textsc");
 839                 else
 840                         handleFont(cur, cmd.argument(), "mathbb");
 841                 break;
 842         /*
 843         case LFUN_FONT_FREE_APPLY:
 844                 handleFont(cur, cmd.argument(), "textrm");
 845                 break;
 846         */
 847         case LFUN_FONT_DEFAULT:
 848                 handleFont(cur, cmd.argument(), "textnormal");
 849                 break;
 850
 851         case LFUN_MATH_MODE: {
 852 #if 1
 853                 // ignore math-mode on when already in math mode
 854                 if (currentMode() == Inset::MATH_MODE && cmd.argument() == "on")
 855                         break;
 856                 cur.macroModeClose();
 857                 docstring const save_selection = grabAndEraseSelection(cur);
 858                 selClearOrDel(cur);
 859                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 860                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 861                 cur.posLeft();
 862                 cur.pushLeft(*cur.nextInset());
 863                 cur.niceInsert(save_selection);
 864 #else
 865                 if (currentMode() == Inset::TEXT_MODE) {
 866                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 867                         cur.message(_("create new math text environment ($...$)"));
 868                 } else {
 869                         handleFont(cur, cmd.argument(), "textrm");
 870                         cur.message(_("entered math text mode (textrm)"));
 871                 }
 872 #endif
 873                 break;
 874         }
 875
 876         case LFUN_MATH_SIZE:
 877 #if 0
 878                 recordUndo(cur);
 879                 cur.setSize(arg);
 880 #endif
 881                 break;
 882
 883         case LFUN_MATH_MATRIX: {
 884                 recordUndo(cur, Undo::ATOMIC);
 885                 unsigned int m = 1;
 886                 unsigned int n = 1;
 887                 docstring v_align;
 888                 docstring h_align;
 889                 idocstringstream is(cmd.argument());
 890                 is >> m >> n >> v_align >> h_align;
 891                 if (m < 1)
 892                         m = 1;
 893                 if (n < 1)
 894                         n = 1;
 895                 v_align += 'c';
 896                 cur.niceInsert(
 897                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 898                 break;
 899         }
 900
 901         case LFUN_MATH_DELIM: {
 902                 docstring ls;
 903                 docstring rs = support::split(cmd.argument(), ls, ' ');
 904                 // Reasonable default values
 905                 if (ls.empty())
 906                         ls = '(';
 907                 if (rs.empty())
 908                         rs = ')';
 909                 recordUndo(cur, Undo::ATOMIC);
 910                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 911                 break;
 912         }
 913
 914         case LFUN_MATH_BIGDELIM: {
 915                 docstring const lname  = from_utf8(cmd.getArg(0));
 916                 docstring const ldelim = from_utf8(cmd.getArg(1));
 917                 docstring const rname  = from_utf8(cmd.getArg(2));
 918                 docstring const rdelim = from_utf8(cmd.getArg(3));
 919                 latexkeys const * l = in_word_set(lname);
 920                 bool const have_l = l && l->inset == "big" &&
 921                                     InsetMathBig::isBigInsetDelim(ldelim);
 922                 l = in_word_set(rname);
 923                 bool const have_r = l && l->inset == "big" &&
 924                                     InsetMathBig::isBigInsetDelim(rdelim);
 925                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 926                 // or right delimiter.
 927                 if (have_l || have_r) {
 928                         recordUndo(cur, Undo::ATOMIC);
 929                         docstring const selection = grabAndEraseSelection(cur);
 930                         selClearOrDel(cur);
 931                         if (have_l)
 932                                 cur.insert(MathAtom(new InsetMathBig(lname,
 933                                                                 ldelim)));
 934                         cur.niceInsert(selection);
 935                         if (have_r)
 936                                 cur.insert(MathAtom(new InsetMathBig(rname,
 937                                                                 rdelim)));
 938                 }
 939                 // Don't call cur.undispatched() if we did nothing, this would
 940                 // lead to infinite recursion via Text::dispatch().
 941                 break;
 942         }
 943
 944         case LFUN_SPACE_INSERT:
 945         case LFUN_MATH_SPACE:
 946                 recordUndo(cur, Undo::ATOMIC);
 947                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 948                 break;
 949
 950         case LFUN_ERT_INSERT:
 951                 // interpret this as if a backslash was typed
 952                 recordUndo(cur, Undo::ATOMIC);
 953                 interpretChar(cur, '\\');
 954                 break;
 955
 956         case LFUN_MATH_SUBSCRIPT:
 957                 // interpret this as if a _ was typed
 958                 recordUndo(cur, Undo::ATOMIC);
 959                 interpretChar(cur, '_');
 960                 break;
 961
 962         case LFUN_MATH_SUPERSCRIPT:
 963                 // interpret this as if a ^ was typed
 964                 recordUndo(cur, Undo::ATOMIC);
 965                 interpretChar(cur, '^');
 966                 break;
 967
 968         case LFUN_QUOTE_INSERT:
 969                 // interpret this as if a straight " was typed
 970                 recordUndo(cur, Undo::ATOMIC);
 971                 interpretChar(cur, '\"');
 972                 break;
 973
 974 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 975 // handling such that "self-insert" works on "arbitrary stuff" too, and
 976 // math-insert only handles special math things like "matrix".
 977         case LFUN_MATH_INSERT: {
 978                 recordUndo(cur, Undo::ATOMIC);
 979                 if (cmd.argument() == "^" || cmd.argument() == "_") {
 980                         interpretChar(cur, cmd.argument()[0]);
 981                 } else
 982                         cur.niceInsert(cmd.argument());
 983                 break;
 984                 }
 985
 986         case LFUN_DIALOG_SHOW_NEW_INSET: {
 987                 docstring const & name = cmd.argument();
 988                 string data;
 989                 if (name == "ref") {
 990                         InsetMathRef tmp(name);
 991                         data = tmp.createDialogStr(to_utf8(name));
 992                 }
 993                 cur.bv().showInsetDialog(to_utf8(name), data, 0);
 994                 break;
 995         }
 996
 997         case LFUN_INSET_INSERT: {
 998                 MathData ar;
 999                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
1000                         recordUndo(cur);
1001                         cur.insert(ar);
1002                 } else
1003                         cur.undispatched();
1004                 break;
1005         }
1006         case LFUN_INSET_DISSOLVE:
1007                 if (!asHullInset()) {
1008                         recordUndoInset(cur, Undo::ATOMIC);
1009                         cur.pullArg();
1010                 }
1011                 break;
1012
1013         default:
1014                 InsetMath::doDispatch(cur, cmd);
1015                 break;
1016         }
1017 }
1018
1019
1020 bool InsetMathNest::getStatus(Cursor & cur, FuncRequest const & cmd,
1021                 FuncStatus & flag) const
1022 {
1023         // the font related toggles
1024         //string tc = "mathnormal";
1025         bool ret = true;
1026         string const arg = to_utf8(cmd.argument());
1027         switch (cmd.action) {
1028         case LFUN_TABULAR_FEATURE:
1029                 flag.enabled(false);
1030                 break;
1031 #if 0
1032         case LFUN_TABULAR_FEATURE:
1033                 // FIXME: check temporarily disabled
1034                 // valign code
1035                 char align = mathcursor::valign();
1036                 if (align == '\0') {
1037                         enable = false;
1038                         break;
1039                 }
1040                 if (cmd.argument().empty()) {
1041                         flag.clear();
1042                         break;
1043                 }
1044                 if (!contains("tcb", cmd.argument()[0])) {
1045                         enable = false;
1046                         break;
1047                 }
1048                 flag.setOnOff(cmd.argument()[0] == align);
1049                 break;
1050 #endif
1051         /// We have to handle them since 1.4 blocks all unhandled actions
1052         case LFUN_FONT_ITAL:
1053         case LFUN_FONT_BOLD:
1054         case LFUN_FONT_SANS:
1055         case LFUN_FONT_EMPH:
1056         case LFUN_FONT_TYPEWRITER:
1057         case LFUN_FONT_NOUN:
1058         case LFUN_FONT_ROMAN:
1059         case LFUN_FONT_DEFAULT:
1060                 flag.enabled(true);
1061                 break;
1062         case LFUN_MATH_MUTATE:
1063                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1064                 flag.setOnOff(false);
1065                 break;
1066
1067         // we just need to be in math mode to enable that
1068         case LFUN_MATH_SIZE:
1069         case LFUN_MATH_SPACE:
1070         case LFUN_MATH_LIMITS:
1071         case LFUN_MATH_NONUMBER:
1072         case LFUN_MATH_NUMBER:
1073         case LFUN_MATH_EXTERN:
1074                 flag.enabled(true);
1075                 break;
1076
1077         case LFUN_FONT_FRAK:
1078                 flag.enabled(currentMode() != TEXT_MODE);
1079                 break;
1080
1081         case LFUN_MATH_INSERT: {
1082                 bool const textarg =
1083                         arg == "\\textbf"   || arg == "\\textsf" ||
1084                         arg == "\\textrm"   || arg == "\\textmd" ||
1085                         arg == "\\textit"   || arg == "\\textsc" ||
1086                         arg == "\\textsl"   || arg == "\\textup" ||
1087                         arg == "\\texttt"   || arg == "\\textbb" ||
1088                         arg == "\\textnormal";
1089                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1090                 break;
1091         }
1092
1093         case LFUN_MATH_MATRIX:
1094                 flag.enabled(currentMode() == MATH_MODE);
1095                 break;
1096
1097         case LFUN_INSET_INSERT: {
1098                 // Don't test createMathInset_fromDialogStr(), since
1099                 // getStatus is not called with a valid reference and the
1100                 // dialog would not be applyable.
1101                 string const name = cmd.getArg(0);
1102                 flag.enabled(name == "ref");
1103                 break;
1104         }
1105
1106         case LFUN_MATH_DELIM:
1107         case LFUN_MATH_BIGDELIM:
1108                 // Don't do this with multi-cell selections
1109                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1110                 break;
1111
1112         case LFUN_HYPHENATION_POINT_INSERT:
1113         case LFUN_LIGATURE_BREAK_INSERT:
1114         case LFUN_MENU_SEPARATOR_INSERT:
1115         case LFUN_DOTS_INSERT:
1116         case LFUN_END_OF_SENTENCE_PERIOD_INSERT:
1117                 // FIXME: These would probably make sense in math-text mode
1118                 flag.enabled(false);
1119                 break;
1120
1121         case LFUN_INSET_DISSOLVE:
1122                 flag.enabled(!asHullInset());
1123                 break;
1124
1125         default:
1126                 ret = false;
1127                 break;
1128         }
1129         return ret;
1130 }
1131
1132
1133 void InsetMathNest::edit(Cursor & cur, bool left)
1134 {
1135         cur.push(*this);
1136         cur.idx() = left ? 0 : cur.lastidx();
1137         cur.pos() = left ? 0 : cur.lastpos();
1138         cur.resetAnchor();
1139         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1140 }
1141
1142
1143 Inset * InsetMathNest::editXY(Cursor & cur, int x, int y)
1144 {
1145         int idx_min = 0;
1146         int dist_min = 1000000;
1147         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1148                 int const d = cell(i).dist(cur.bv(), x, y);
1149                 if (d < dist_min) {
1150                         dist_min = d;
1151                         idx_min = i;
1152                 }
1153         }
1154         MathData & ar = cell(idx_min);
1155         cur.push(*this);
1156         cur.idx() = idx_min;
1157         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1158
1159         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1160         if (dist_min == 0) {
1161                 // hit inside cell
1162                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1163                         if (ar[i]->covers(cur.bv(), x, y))
1164                                 return ar[i].nucleus()->editXY(cur, x, y);
1165         }
1166         return this;
1167 }
1168
1169
1170 void InsetMathNest::lfunMousePress(Cursor & cur, FuncRequest & cmd)
1171 {
1172         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1173         BufferView & bv = cur.bv();
1174         bool do_selection = cmd.button() == mouse_button::button1
1175                 && cmd.argument() == "region-select";
1176         bv.mouseSetCursor(cur, do_selection);
1177         if (cmd.button() == mouse_button::button1) {
1178                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1179                 // Update the cursor update flags as needed:
1180                 //
1181                 // Update::Decoration: tells to update the decoration
1182                 //                     (visual box corners that define
1183                 //                     the inset)/
1184                 // Update::FitCursor: adjust the screen to the cursor
1185                 //                    position if needed
1186                 // cur.result().update(): don't overwrite previously set flags.
1187                 cur.updateFlags(Update::Decoration | Update::FitCursor
1188                                 | cur.result().update());
1189         } else if (cmd.button() == mouse_button::button2) {
1190                 if (cap::selection()) {
1191                         // See comment in Text::dispatch why we do this
1192                         cap::copySelectionToStack();
1193                         cmd = FuncRequest(LFUN_PASTE, "0");
1194                         doDispatch(bv.cursor(), cmd);
1195                 } else {
1196                         MathData ar;
1197                         asArray(theSelection().get(), ar);
1198                         bv.cursor().insert(ar);
1199                 }
1200         }
1201 }
1202
1203
1204 void InsetMathNest::lfunMouseMotion(Cursor & cur, FuncRequest & cmd)
1205 {
1206         // only select with button 1
1207         if (cmd.button() == mouse_button::button1) {
1208                 Cursor & bvcur = cur.bv().cursor();
1209                 if (bvcur.anchor_.hasPart(cur)) {
1210                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1211                         bvcur.setCursor(cur);
1212                         bvcur.selection() = true;
1213                         //lyxerr << "MOTION " << bvcur << endl;
1214                 } else
1215                         cur.undispatched();
1216         }
1217 }
1218
1219
1220 void InsetMathNest::lfunMouseRelease(Cursor & cur, FuncRequest & cmd)
1221 {
1222         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1223
1224         if (cmd.button() == mouse_button::button1) {
1225                 if (!cur.selection())
1226                         cur.noUpdate();
1227                 else {
1228                         Cursor & bvcur = cur.bv().cursor();
1229                         bvcur.selection() = true;
1230                 }
1231                 return;
1232         }
1233
1234         cur.undispatched();
1235 }
1236
1237
1238 bool InsetMathNest::interpretChar(Cursor & cur, char_type c)
1239 {
1240         //lyxerr << "interpret 2: '" << c << "'" << endl;
1241         docstring save_selection;
1242         if (c == '^' || c == '_')
1243                 save_selection = grabAndEraseSelection(cur);
1244
1245         cur.clearTargetX();
1246
1247         // handle macroMode
1248         if (cur.inMacroMode()) {
1249                 docstring name = cur.macroName();
1250
1251                 /// are we currently typing '#1' or '#2' or...?
1252                 if (name == "\\#") {
1253                         cur.backspace();
1254                         int n = c - '0';
1255                         if (n >= 1 && n <= 9)
1256                                 cur.insert(new MathMacroArgument(n));
1257                         return true;
1258                 }
1259
1260                 if (isAlphaASCII(c)) {
1261                         cur.activeMacro()->setName(name + docstring(1, c));
1262                         return true;
1263                 }
1264
1265                 // handle 'special char' macros
1266                 if (name == "\\") {
1267                         // remove the '\\'
1268                         if (c == '\\') {
1269                                 cur.backspace();
1270                                 if (currentMode() == InsetMath::TEXT_MODE)
1271                                         cur.niceInsert(createInsetMath("textbackslash"));
1272                                 else
1273                                         cur.niceInsert(createInsetMath("backslash"));
1274                         } else if (c == '{') {
1275                                 cur.backspace();
1276                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1277                         } else if (c == '%') {
1278                                 cur.backspace();
1279                                 cur.niceInsert(MathAtom(new InsetMathComment));
1280                         } else if (c == '#') {
1281                                 BOOST_ASSERT(cur.activeMacro());
1282                                 cur.activeMacro()->setName(name + docstring(1, c));
1283                         } else {
1284                                 cur.backspace();
1285                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1286                         }
1287                         return true;
1288                 }
1289
1290                 // One character big delimiters. The others are handled in
1291                 // interpretString().
1292                 latexkeys const * l = in_word_set(name.substr(1));
1293                 if (name[0] == '\\' && l && l->inset == "big") {
1294                         docstring delim;
1295                         switch (c) {
1296                         case '{':
1297                                 delim = from_ascii("\\{");
1298                                 break;
1299                         case '}':
1300                                 delim = from_ascii("\\}");
1301                                 break;
1302                         default:
1303                                 delim = docstring(1, c);
1304                                 break;
1305                         }
1306                         if (InsetMathBig::isBigInsetDelim(delim)) {
1307                                 // name + delim ared a valid InsetMathBig.
1308                                 // We can't use cur.macroModeClose() because
1309                                 // it does not handle delim.
1310                                 InsetMathUnknown * p = cur.activeMacro();
1311                                 p->finalize();
1312                                 --cur.pos();
1313                                 cur.cell().erase(cur.pos());
1314                                 cur.plainInsert(MathAtom(
1315                                         new InsetMathBig(name.substr(1), delim)));
1316                                 return true;
1317                         }
1318                 }
1319
1320                 // leave macro mode and try again if necessary
1321                 cur.macroModeClose();
1322                 if (c == '{')
1323                         cur.niceInsert(MathAtom(new InsetMathBrace));
1324                 else if (c != ' ')
1325                         interpretChar(cur, c);
1326                 return true;
1327         }
1328
1329         // This is annoying as one has to press <space> far too often.
1330         // Disable it.
1331
1332 #if 0
1333                 // leave autocorrect mode if necessary
1334                 if (autocorrect() && c == ' ') {
1335                         autocorrect() = false;
1336                         return true;
1337                 }
1338 #endif
1339
1340         // just clear selection on pressing the space bar
1341         if (cur.selection() && c == ' ') {
1342                 cur.selection() = false;
1343                 return true;
1344         }
1345
1346         selClearOrDel(cur);
1347
1348         if (c == '\\') {
1349                 //lyxerr << "starting with macro" << endl;
1350                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1351                 return true;
1352         }
1353
1354         if (c == '\n') {
1355                 if (currentMode() == InsetMath::TEXT_MODE)
1356                         cur.insert(c);
1357                 return true;
1358         }
1359
1360         if (c == ' ') {
1361                 if (currentMode() == InsetMath::TEXT_MODE) {
1362                         // insert spaces in text mode,
1363                         // but suppress direct insertion of two spaces in a row
1364                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1365                         // it is better than nothing...
1366                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ') {
1367                                 cur.insert(c);
1368                                 // FIXME: we have to enable full redraw here because of the
1369                                 // visual box corners that define the inset. If we know for
1370                                 // sure that we stay within the same cell we can optimize for
1371                                 // that using:
1372                                 //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1373                         }
1374                         return true;
1375                 }
1376                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1377                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1378                         // FIXME: we have to enable full redraw here because of the
1379                         // visual box corners that define the inset. If we know for
1380                         // sure that we stay within the same cell we can optimize for
1381                         // that using:
1382                         //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1383                         return true;
1384                 }
1385
1386                 if (cur.popRight()) {
1387                         // FIXME: we have to enable full redraw here because of the
1388                         // visual box corners that define the inset. If we know for
1389                         // sure that we stay within the same cell we can optimize for
1390                         // that using:
1391                         //cur.updateFlags(Update::FitCursor);
1392                         return true;
1393                 }
1394
1395                 // if we are at the very end, leave the formula
1396                 return cur.pos() != cur.lastpos();
1397         }
1398
1399         // These shouldn't work in text mode:
1400         if (currentMode() != InsetMath::TEXT_MODE) {
1401                 if (c == '_') {
1402                         script(cur, false, save_selection);
1403                         return true;
1404                 }
1405                 if (c == '^') {
1406                         script(cur, true, save_selection);
1407                         return true;
1408                 }
1409                 if (c == '~') {
1410                         cur.niceInsert(createInsetMath("sim"));
1411                         return true;
1412                 }
1413         }
1414
1415         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1416             c == '%' || c == '_' || c == '^') {
1417                 cur.niceInsert(createInsetMath(docstring(1, c)));
1418                 return true;
1419         }
1420
1421
1422         // try auto-correction
1423         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1424         //      return true;
1425
1426         // no special circumstances, so insert the character without any fuss
1427         cur.insert(c);
1428         cur.autocorrect() = true;
1429         return true;
1430 }
1431
1432
1433 bool InsetMathNest::interpretString(Cursor & cur, docstring const & str)
1434 {
1435         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1436         // possible
1437         if (!cur.empty() && cur.pos() > 0 &&
1438             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1439                 if (InsetMathBig::isBigInsetDelim(str)) {
1440                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1441                         if (prev[0] == '\\') {
1442                                 prev = prev.substr(1);
1443                                 latexkeys const * l = in_word_set(prev);
1444                                 if (l && l->inset == "big") {
1445                                         cur.cell()[cur.pos() - 1] =
1446                                                 MathAtom(new InsetMathBig(prev, str));
1447                                         return true;
1448                                 }
1449                         }
1450                 }
1451         }
1452         return false;
1453 }
1454
1455
1456 bool InsetMathNest::script(Cursor & cur, bool up,
1457                 docstring const & save_selection)
1458 {
1459         // Hack to get \^ and \_ working
1460         //lyxerr << "handling script: up: " << up << endl;
1461         if (cur.inMacroMode() && cur.macroName() == "\\") {
1462                 if (up)
1463                         cur.niceInsert(createInsetMath("mathcircumflex"));
1464                 else
1465                         interpretChar(cur, '_');
1466                 return true;
1467         }
1468
1469         cur.macroModeClose();
1470         if (asScriptInset() && cur.idx() == 0) {
1471                 // we are in a nucleus of a script inset, move to _our_ script
1472                 InsetMathScript * inset = asScriptInset();
1473                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1474                 inset->ensure(up);
1475                 cur.idx() = inset->idxOfScript(up);
1476                 cur.pos() = 0;
1477         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1478                 --cur.pos();
1479                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1480                 cur.push(*inset);
1481                 inset->ensure(up);
1482                 cur.idx() = inset->idxOfScript(up);
1483                 cur.pos() = cur.lastpos();
1484         } else {
1485                 // convert the thing to our left to a scriptinset or create a new
1486                 // one if in the very first position of the array
1487                 if (cur.pos() == 0) {
1488                         //lyxerr << "new scriptinset" << endl;
1489                         cur.insert(new InsetMathScript(up));
1490                 } else {
1491                         //lyxerr << "converting prev atom " << endl;
1492                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1493                 }
1494                 --cur.pos();
1495                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1496                 // See comment in MathParser.cpp for special handling of {}-bases
1497
1498                 cur.push(*inset);
1499                 cur.idx() = 1;
1500                 cur.pos() = 0;
1501         }
1502         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1503         cur.niceInsert(save_selection);
1504         cur.resetAnchor();
1505         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1506         return true;
1507 }
1508
1509
1510 } // namespace lyx