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 "bufferview_funcs.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 "LyXText.h"
  48 #include "OutputParams.h"
  49 #include "Undo.h"
  50
  51 #include "support/lstrings.h"
  52 #include "support/textutils.h"
  53
  54 #include "frontends/Clipboard.h"
  55 #include "frontends/Painter.h"
  56 #include "frontends/Selection.h"
  57
  58 #include "FuncRequest.h"
  59
  60 #include <sstream>
  61
  62
  63 namespace lyx {
  64
  65 using cap::copySelection;
  66 using cap::grabAndEraseSelection;
  67 using cap::cutSelection;
  68 using cap::replaceSelection;
  69 using cap::selClearOrDel;
  70
  71 using std::endl;
  72 using std::string;
  73 using std::istringstream;
  74
  75
  76 InsetMathNest::InsetMathNest(idx_type nargs)
  77         : cells_(nargs), lock_(false)
  78 {}
  79
  80
  81 InsetMath::idx_type InsetMathNest::nargs() const
  82 {
  83         return cells_.size();
  84 }
  85
  86
  87 void InsetMathNest::cursorPos(BufferView const & bv,
  88                 CursorSlice const & sl, bool /*boundary*/,
  89                 int & x, int & y) const
  90 {
  91 // FIXME: This is a hack. Ideally, the coord cache should not store
  92 // absolute positions, but relative ones. This would mean to call
  93 // setXY() not in MathData::draw(), but in the parent insets' draw()
  94 // with the correctly adjusted x,y values. But this means that we'd have
  95 // to touch all (math)inset's draw() methods. Right now, we'll store
  96 // absolute value, and make them here relative, only to make them
  97 // absolute again when actually drawing the cursor. What a mess.
  98         BOOST_ASSERT(ptr_cmp(&sl.inset(), this));
  99         MathData const & ar = sl.cell();
 100         CoordCache const & coord_cache = bv.coordCache();
 101         if (!coord_cache.getArrays().has(&ar)) {
 102                 // this can (semi-)legally happen if we just created this cell
 103                 // and it never has been drawn before. So don't ASSERT.
 104                 //lyxerr << "no cached data for array " << &ar << endl;
 105                 x = 0;
 106                 y = 0;
 107                 return;
 108         }
 109         Point const pt = coord_cache.getArrays().xy(&ar);
 110         if (!coord_cache.getInsets().has(this)) {
 111                 // same as above
 112                 //lyxerr << "no cached data for inset " << this << endl;
 113                 x = 0;
 114                 y = 0;
 115                 return;
 116         }
 117         Point const pt2 = coord_cache.getInsets().xy(this);
 118         //lyxerr << "retrieving position cache for MathData "
 119         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 120         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 121         y = pt.y_ - pt2.y_;
 122 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 123 //              << " asc: " << ascent() << "  des: " << descent()
 124 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 125         // move cursor visually into empty cells ("blue rectangles");
 126         if (ar.empty())
 127                 x += 2;
 128 }
 129
 130
 131 void InsetMathNest::metrics(MetricsInfo const & mi) const
 132 {
 133         MetricsInfo m = mi;
 134         for (idx_type i = 0, n = nargs(); i != n; ++i)
 135                 cell(i).metrics(m);
 136 }
 137
 138
 139 bool InsetMathNest::idxNext(Cursor & cur) const
 140 {
 141         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 142         if (cur.idx() == cur.lastidx())
 143                 return false;
 144         ++cur.idx();
 145         cur.pos() = 0;
 146         return true;
 147 }
 148
 149
 150 bool InsetMathNest::idxRight(Cursor & cur) const
 151 {
 152         return idxNext(cur);
 153 }
 154
 155
 156 bool InsetMathNest::idxPrev(Cursor & cur) const
 157 {
 158         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 159         if (cur.idx() == 0)
 160                 return false;
 161         --cur.idx();
 162         cur.pos() = cur.lastpos();
 163         return true;
 164 }
 165
 166
 167 bool InsetMathNest::idxLeft(Cursor & cur) const
 168 {
 169         return idxPrev(cur);
 170 }
 171
 172
 173 bool InsetMathNest::idxFirst(Cursor & cur) const
 174 {
 175         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 176         if (nargs() == 0)
 177                 return false;
 178         cur.idx() = 0;
 179         cur.pos() = 0;
 180         return true;
 181 }
 182
 183
 184 bool InsetMathNest::idxLast(Cursor & cur) const
 185 {
 186         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 187         if (nargs() == 0)
 188                 return false;
 189         cur.idx() = cur.lastidx();
 190         cur.pos() = cur.lastpos();
 191         return true;
 192 }
 193
 194
 195 void InsetMathNest::dump() const
 196 {
 197         odocstringstream oss;
 198         WriteStream os(oss);
 199         os << "---------------------------------------------\n";
 200         write(os);
 201         os << "\n";
 202         for (idx_type i = 0, n = nargs(); i != n; ++i)
 203                 os << cell(i) << "\n";
 204         os << "---------------------------------------------\n";
 205         lyxerr << to_utf8(oss.str());
 206 }
 207
 208
 209 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 210 {
 211 #if 0
 212         if (lock_)
 213                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 214                                         Color::mathlockbg);
 215 #endif
 216         setPosCache(pi, x, y);
 217 }
 218
 219
 220 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 221 {
 222         BufferView & bv = *pi.base.bv;
 223         // this should use the x/y values given, not the cached values
 224         Cursor & cur = bv.cursor();
 225         if (!cur.selection())
 226                 return;
 227         if (!ptr_cmp(&cur.inset(), this))
 228                 return;
 229
 230         // FIXME: hack to get position cache warm
 231         pi.pain.setDrawingEnabled(false);
 232         draw(pi, x, y);
 233         pi.pain.setDrawingEnabled(true);
 234
 235         CursorSlice s1 = cur.selBegin();
 236         CursorSlice s2 = cur.selEnd();
 237
 238         //lyxerr << "InsetMathNest::drawing selection: "
 239         //      << " s1: " << s1 << " s2: " << s2 << endl;
 240         if (s1.idx() == s2.idx()) {
 241                 MathData const & c = cell(s1.idx());
 242                 int x1 = c.xo(bv) + c.pos2x(s1.pos());
 243                 int y1 = c.yo(bv) - c.ascent();
 244                 int x2 = c.xo(bv) + c.pos2x(s2.pos());
 245                 int y2 = c.yo(bv) + c.descent();
 246                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color::selection);
 247         //lyxerr << "InsetMathNest::drawing selection 3: "
 248         //      << " x1: " << x1 << " x2: " << x2
 249         //      << " y1: " << y1 << " y2: " << y2 << endl;
 250         } else {
 251                 for (idx_type i = 0; i < nargs(); ++i) {
 252                         if (idxBetween(i, s1.idx(), s2.idx())) {
 253                                 MathData const & c = cell(i);
 254                                 int x1 = c.xo(bv);
 255                                 int y1 = c.yo(bv) - c.ascent();
 256                                 int x2 = c.xo(bv) + c.width();
 257                                 int y2 = c.yo(bv) + c.descent();
 258                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color::selection);
 259                         }
 260                 }
 261         }
 262 }
 263
 264
 265 void InsetMathNest::validate(LaTeXFeatures & features) const
 266 {
 267         for (idx_type i = 0; i < nargs(); ++i)
 268                 cell(i).validate(features);
 269 }
 270
 271
 272 void InsetMathNest::replace(ReplaceData & rep)
 273 {
 274         for (idx_type i = 0; i < nargs(); ++i)
 275                 cell(i).replace(rep);
 276 }
 277
 278
 279 bool InsetMathNest::contains(MathData const & ar) const
 280 {
 281         for (idx_type i = 0; i < nargs(); ++i)
 282                 if (cell(i).contains(ar))
 283                         return true;
 284         return false;
 285 }
 286
 287
 288 bool InsetMathNest::lock() const
 289 {
 290         return lock_;
 291 }
 292
 293
 294 void InsetMathNest::lock(bool l)
 295 {
 296         lock_ = l;
 297 }
 298
 299
 300 bool InsetMathNest::isActive() const
 301 {
 302         return nargs() > 0;
 303 }
 304
 305
 306 MathData InsetMathNest::glue() const
 307 {
 308         MathData ar;
 309         for (size_t i = 0; i < nargs(); ++i)
 310                 ar.append(cell(i));
 311         return ar;
 312 }
 313
 314
 315 void InsetMathNest::write(WriteStream & os) const
 316 {
 317         os << '\\' << name().c_str();
 318         for (size_t i = 0; i < nargs(); ++i)
 319                 os << '{' << cell(i) << '}';
 320         if (nargs() == 0)
 321                 os.pendingSpace(true);
 322         if (lock_ && !os.latex()) {
 323                 os << "\\lyxlock";
 324                 os.pendingSpace(true);
 325         }
 326 }
 327
 328
 329 void InsetMathNest::normalize(NormalStream & os) const
 330 {
 331         os << '[' << name().c_str();
 332         for (size_t i = 0; i < nargs(); ++i)
 333                 os << ' ' << cell(i);
 334         os << ']';
 335 }
 336
 337
 338 int InsetMathNest::latex(Buffer const &, odocstream & os,
 339                         OutputParams const & runparams) const
 340 {
 341         WriteStream wi(os, runparams.moving_arg, true);
 342         write(wi);
 343         return wi.line();
 344 }
 345
 346
 347 bool InsetMathNest::notifyCursorLeaves(Cursor & /*cur*/)
 348 {
 349 #ifdef WITH_WARNINGS
 350 #warning look here
 351 #endif
 352 #if 0
 353         MathData & ar = cur.cell();
 354         // remove base-only "scripts"
 355         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 356                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 357                 if (p && p->nargs() == 1) {
 358                         MathData ar = p->nuc();
 359                         erase(i);
 360                         insert(i, ar);
 361                         cur.adjust(i, ar.size() - 1);
 362                 }
 363         }
 364
 365         // glue adjacent font insets of the same kind
 366         for (pos_type i = 0; i + 1 < size(); ++i) {
 367                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 368                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 369                 if (p && q && p->name() == q->name()) {
 370                         p->cell(0).append(q->cell(0));
 371                         erase(i + 1);
 372                         cur.adjust(i, -1);
 373                 }
 374         }
 375 #endif
 376         return false;
 377 }
 378
 379
 380 void InsetMathNest::handleFont
 381         (Cursor & cur, docstring const & arg, char const * const font)
 382 {
 383         handleFont(cur, arg, from_ascii(font));
 384 }
 385
 386
 387 void InsetMathNest::handleFont
 388         (Cursor & cur, docstring const & arg, docstring const & font)
 389 {
 390         // this whole function is a hack and won't work for incremental font
 391         // changes...
 392
 393         if (cur.inset().asInsetMath()->name() == font) {
 394                 recordUndoInset(cur, Undo::ATOMIC);
 395                 cur.handleFont(to_utf8(font));
 396         } else {
 397                 recordUndo(cur, Undo::ATOMIC);
 398                 cur.handleNest(createInsetMath(font));
 399                 cur.insert(arg);
 400         }
 401 }
 402
 403
 404 void InsetMathNest::handleFont2(Cursor & cur, docstring const & arg)
 405 {
 406         recordUndo(cur, Undo::ATOMIC);
 407         LyXFont font;
 408         bool b;
 409         bv_funcs::string2font(to_utf8(arg), font, b);
 410         if (font.color() != Color::inherit) {
 411                 MathAtom at = MathAtom(new InsetMathColor(true, font.color()));
 412                 cur.handleNest(at, 0);
 413         }
 414 }
 415
 416
 417 void InsetMathNest::doDispatch(Cursor & cur, FuncRequest & cmd)
 418 {
 419         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 420         //CursorSlice sl = cur.current();
 421
 422         switch (cmd.action) {
 423
 424         case LFUN_PASTE: {
 425                 recordUndo(cur);
 426                 cur.message(_("Paste"));
 427                 replaceSelection(cur);
 428                 docstring topaste;
 429                 if (cmd.argument().empty() && !theClipboard().isInternal())
 430                         topaste = theClipboard().getAsText();
 431                 else {
 432                         size_t n = 0;
 433                         idocstringstream is(cmd.argument());
 434                         is >> n;
 435                         topaste = cap::getSelection(cur.buffer(), n);
 436                 }
 437                 cur.niceInsert(topaste);
 438                 cur.clearSelection(); // bug 393
 439                 cur.bv().switchKeyMap();
 440                 finishUndo();
 441                 break;
 442         }
 443
 444         case LFUN_CUT:
 445                 recordUndo(cur);
 446                 cutSelection(cur, true, true);
 447                 cur.message(_("Cut"));
 448                 // Prevent stale position >= size crash
 449                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 450                 cur.normalize();
 451                 break;
 452
 453         case LFUN_COPY:
 454                 copySelection(cur);
 455                 cur.message(_("Copy"));
 456                 break;
 457
 458         case LFUN_MOUSE_PRESS:
 459                 lfunMousePress(cur, cmd);
 460                 break;
 461
 462         case LFUN_MOUSE_MOTION:
 463                 lfunMouseMotion(cur, cmd);
 464                 break;
 465
 466         case LFUN_MOUSE_RELEASE:
 467                 lfunMouseRelease(cur, cmd);
 468                 break;
 469
 470         case LFUN_FINISHED_LEFT:
 471                 cur.bv().cursor() = cur;
 472                 break;
 473
 474         case LFUN_FINISHED_RIGHT:
 475                 ++cur.pos();
 476                 cur.bv().cursor() = cur;
 477                 break;
 478
 479         case LFUN_FINISHED_UP:
 480                 cur.bv().cursor() = cur;
 481                 break;
 482
 483         case LFUN_FINISHED_DOWN:
 484                 ++cur.pos();
 485                 cur.bv().cursor() = cur;
 486                 break;
 487
 488         case LFUN_CHAR_FORWARD:
 489                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 490         case LFUN_CHAR_FORWARD_SELECT:
 491                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 492                 cur.autocorrect() = false;
 493                 cur.clearTargetX();
 494                 cur.macroModeClose();
 495                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 496                         cur.pushLeft(*cur.nextAtom().nucleus());
 497                         cur.inset().idxFirst(cur);
 498                 } else if (cur.posRight() || idxRight(cur)
 499                         || cur.popRight() || cur.selection())
 500                         ;
 501                 else {
 502                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 503                         cur.undispatched();
 504                 }
 505                 break;
 506
 507         case LFUN_CHAR_BACKWARD:
 508                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 509         case LFUN_CHAR_BACKWARD_SELECT:
 510                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 511                 cur.autocorrect() = false;
 512                 cur.clearTargetX();
 513                 cur.macroModeClose();
 514                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 515                         cur.posLeft();
 516                         cur.push(*cur.nextAtom().nucleus());
 517                         cur.inset().idxLast(cur);
 518                 } else if (cur.posLeft() || idxLeft(cur)
 519                         || cur.popLeft() || cur.selection())
 520                         ;
 521                 else {
 522                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 523                         cur.undispatched();
 524                 }
 525                 break;
 526
 527         case LFUN_UP:
 528                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 529         case LFUN_UP_SELECT:
 530                 // FIXME Tried to use clearTargetX and macroModeClose, crashed on cur.up()
 531                 if (cur.inMacroMode()) {
 532                         // Make Helge happy
 533                         cur.macroModeClose();
 534                         break;
 535                 }
 536                 cur.selHandle(cmd.action == LFUN_UP_SELECT);
 537                 if (!cur.up()) {
 538                         cmd = FuncRequest(LFUN_FINISHED_UP);
 539                         cur.undispatched();
 540                 }
 541                 // fixes bug 1598. Please check!
 542                 cur.normalize();
 543                 break;
 544
 545         case LFUN_DOWN:
 546                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 547         case LFUN_DOWN_SELECT:
 548                 if (cur.inMacroMode()) {
 549                         cur.macroModeClose();
 550                         break;
 551                 }
 552                 cur.selHandle(cmd.action == LFUN_DOWN_SELECT);
 553                 if (!cur.down()) {
 554                         cmd = FuncRequest(LFUN_FINISHED_DOWN);
 555                         cur.undispatched();
 556                 }
 557                 // fixes bug 1598. Please check!
 558                 cur.normalize();
 559                 break;
 560
 561         case LFUN_MOUSE_DOUBLE:
 562         case LFUN_MOUSE_TRIPLE:
 563         case LFUN_WORD_SELECT:
 564                 cur.pos() = 0;
 565                 cur.idx() = 0;
 566                 cur.resetAnchor();
 567                 cur.selection() = true;
 568                 cur.pos() = cur.lastpos();
 569                 cur.idx() = cur.lastidx();
 570                 cap::saveSelection(cur);
 571                 break;
 572
 573         case LFUN_PARAGRAPH_UP:
 574         case LFUN_PARAGRAPH_DOWN:
 575                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 576         case LFUN_PARAGRAPH_UP_SELECT:
 577         case LFUN_PARAGRAPH_DOWN_SELECT:
 578                 break;
 579
 580         case LFUN_LINE_BEGIN:
 581         case LFUN_WORD_BACKWARD:
 582                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 583         case LFUN_LINE_BEGIN_SELECT:
 584         case LFUN_WORD_BACKWARD_SELECT:
 585                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 586                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 587                 cur.macroModeClose();
 588                 if (cur.pos() != 0) {
 589                         cur.pos() = 0;
 590                 } else if (cur.col() != 0) {
 591                         cur.idx() -= cur.col();
 592                         cur.pos() = 0;
 593                 } else if (cur.idx() != 0) {
 594                         cur.idx() = 0;
 595                         cur.pos() = 0;
 596                 } else {
 597                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 598                         cur.undispatched();
 599                 }
 600                 break;
 601
 602         case LFUN_WORD_FORWARD:
 603         case LFUN_LINE_END:
 604                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 605         case LFUN_WORD_FORWARD_SELECT:
 606         case LFUN_LINE_END_SELECT:
 607                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 608                                 cmd.action == LFUN_LINE_END_SELECT);
 609                 cur.macroModeClose();
 610                 cur.clearTargetX();
 611                 if (cur.pos() != cur.lastpos()) {
 612                         cur.pos() = cur.lastpos();
 613                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 614                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 615                         cur.pos() = cur.lastpos();
 616                 } else if (cur.idx() != cur.lastidx()) {
 617                         cur.idx() = cur.lastidx();
 618                         cur.pos() = cur.lastpos();
 619                 } else {
 620                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 621                         cur.undispatched();
 622                 }
 623                 break;
 624
 625         case LFUN_SCREEN_UP_SELECT:
 626         case LFUN_SCREEN_UP:
 627                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 628                 cur.undispatched();
 629                 break;
 630
 631         case LFUN_SCREEN_DOWN_SELECT:
 632         case LFUN_SCREEN_DOWN:
 633                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 634                 cur.undispatched();
 635                 break;
 636
 637         case LFUN_CELL_FORWARD:
 638                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 639                 cur.inset().idxNext(cur);
 640                 break;
 641
 642         case LFUN_CELL_BACKWARD:
 643                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 644                 cur.inset().idxPrev(cur);
 645                 break;
 646
 647         case LFUN_WORD_DELETE_BACKWARD:
 648         case LFUN_CHAR_DELETE_BACKWARD:
 649                 if (cur.pos() == 0)
 650                         // May affect external cell:
 651                         recordUndoInset(cur, Undo::ATOMIC);
 652                 else
 653                         recordUndo(cur, Undo::ATOMIC);
 654                 // if the inset can not be removed from within, delete it
 655                 if (!cur.backspace()) {
 656                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 657                         cur.innerText()->dispatch(cur, cmd);
 658                 }
 659                 break;
 660
 661         case LFUN_WORD_DELETE_FORWARD:
 662         case LFUN_CHAR_DELETE_FORWARD:
 663                 if (cur.pos() == cur.lastpos())
 664                         // May affect external cell:
 665                         recordUndoInset(cur, Undo::ATOMIC);
 666                 else
 667                         recordUndo(cur, Undo::ATOMIC);
 668                 // if the inset can not be removed from within, delete it
 669                 if (!cur.erase()) {
 670                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 671                         cur.innerText()->dispatch(cur, cmd);
 672                 }
 673                 break;
 674
 675         case LFUN_ESCAPE:
 676                 if (cur.selection())
 677                         cur.clearSelection();
 678                 else  {
 679                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 680                         cur.undispatched();
 681                 }
 682                 break;
 683
 684         case LFUN_INSET_TOGGLE:
 685                 recordUndo(cur);
 686                 lock(!lock());
 687                 cur.popRight();
 688                 break;
 689
 690         case LFUN_SELF_INSERT:
 691                 if (cmd.argument().size() != 1) {
 692                         recordUndo(cur);
 693                         docstring const arg = cmd.argument();
 694                         if (!interpretString(cur, arg))
 695                                 cur.insert(arg);
 696                         break;
 697                 }
 698                 // Don't record undo steps if we are in macro mode and
 699                 // cmd.argument is the next character of the macro name.
 700                 // Otherwise we'll get an invalid cursor if we undo after
 701                 // the macro was finished and the macro is a known command,
 702                 // e.g. sqrt. Cursor::macroModeClose replaces in this case
 703                 // the InsetMathUnknown with name "frac" by an empty
 704                 // InsetMathFrac -> a pos value > 0 is invalid.
 705                 // A side effect is that an undo before the macro is finished
 706                 // undoes the complete macro, not only the last character.
 707                 if (!cur.inMacroMode())
 708                         recordUndo(cur);
 709
 710                 // spacial handling of space. If we insert an inset
 711                 // via macro mode, we want to put the cursor inside it
 712                 // if relevant. Think typing "\frac<space>".
 713                 if (cmd.argument()[0] == ' '
 714                     && cur.inMacroMode() && cur.macroName() != "\\"
 715                     && cur.macroModeClose()) {
 716                         MathAtom const atom = cur.prevAtom();
 717                         if (atom->asNestInset() && atom->nargs() > 0) {
 718                                 cur.posLeft();
 719                                 cur.pushLeft(*cur.nextInset());
 720                         }
 721                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 722                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 723                         cur.undispatched();
 724                 }
 725                 break;
 726
 727         //case LFUN_SERVER_GET_XY:
 728         //      sprintf(dispatch_buffer, "%d %d",);
 729         //      break;
 730
 731         case LFUN_SERVER_SET_XY: {
 732                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 733                 int x = 0;
 734                 int y = 0;
 735                 istringstream is(to_utf8(cmd.argument()));
 736                 is >> x >> y;
 737                 cur.setScreenPos(x, y);
 738                 break;
 739         }
 740
 741         // Special casing for superscript in case of LyX handling
 742         // dead-keys:
 743         case LFUN_ACCENT_CIRCUMFLEX:
 744                 if (cmd.argument().empty()) {
 745                         // do superscript if LyX handles
 746                         // deadkeys
 747                         recordUndo(cur, Undo::ATOMIC);
 748                         script(cur, true, grabAndEraseSelection(cur));
 749                 }
 750                 break;
 751
 752         case LFUN_ACCENT_UMLAUT:
 753         case LFUN_ACCENT_ACUTE:
 754         case LFUN_ACCENT_GRAVE:
 755         case LFUN_ACCENT_BREVE:
 756         case LFUN_ACCENT_DOT:
 757         case LFUN_ACCENT_MACRON:
 758         case LFUN_ACCENT_CARON:
 759         case LFUN_ACCENT_TILDE:
 760         case LFUN_ACCENT_CEDILLA:
 761         case LFUN_ACCENT_CIRCLE:
 762         case LFUN_ACCENT_UNDERDOT:
 763         case LFUN_ACCENT_TIE:
 764         case LFUN_ACCENT_OGONEK:
 765         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 766                 break;
 767
 768         //  Math fonts
 769         case LFUN_FONT_FREE_APPLY:
 770         case LFUN_FONT_FREE_UPDATE:
 771                 handleFont2(cur, cmd.argument());
 772                 break;
 773
 774         case LFUN_FONT_BOLD:
 775                 if (currentMode() == TEXT_MODE)
 776                         handleFont(cur, cmd.argument(), "textbf");
 777                 else
 778                         handleFont(cur, cmd.argument(), "mathbf");
 779                 break;
 780         case LFUN_FONT_SANS:
 781                 if (currentMode() == TEXT_MODE)
 782                         handleFont(cur, cmd.argument(), "textsf");
 783                 else
 784                         handleFont(cur, cmd.argument(), "mathsf");
 785                 break;
 786         case LFUN_FONT_EMPH:
 787                 if (currentMode() == TEXT_MODE)
 788                         handleFont(cur, cmd.argument(), "emph");
 789                 else
 790                         handleFont(cur, cmd.argument(), "mathcal");
 791                 break;
 792         case LFUN_FONT_ROMAN:
 793                 if (currentMode() == TEXT_MODE)
 794                         handleFont(cur, cmd.argument(), "textrm");
 795                 else
 796                         handleFont(cur, cmd.argument(), "mathrm");
 797                 break;
 798         case LFUN_FONT_CODE:
 799                 if (currentMode() == TEXT_MODE)
 800                         handleFont(cur, cmd.argument(), "texttt");
 801                 else
 802                         handleFont(cur, cmd.argument(), "mathtt");
 803                 break;
 804         case LFUN_FONT_FRAK:
 805                 handleFont(cur, cmd.argument(), "mathfrak");
 806                 break;
 807         case LFUN_FONT_ITAL:
 808                 if (currentMode() == TEXT_MODE)
 809                         handleFont(cur, cmd.argument(), "textit");
 810                 else
 811                         handleFont(cur, cmd.argument(), "mathit");
 812                 break;
 813         case LFUN_FONT_NOUN:
 814                 if (currentMode() == TEXT_MODE)
 815                         // FIXME: should be "noun"
 816                         handleFont(cur, cmd.argument(), "textsc");
 817                 else
 818                         handleFont(cur, cmd.argument(), "mathbb");
 819                 break;
 820         /*
 821         case LFUN_FONT_FREE_APPLY:
 822                 handleFont(cur, cmd.argument(), "textrm");
 823                 break;
 824         */
 825         case LFUN_FONT_DEFAULT:
 826                 handleFont(cur, cmd.argument(), "textnormal");
 827                 break;
 828
 829         case LFUN_MATH_MODE: {
 830 #if 1
 831                 // ignore math-mode on when already in math mode
 832                 if (currentMode() == Inset::MATH_MODE && cmd.argument() == "on")
 833                         break;
 834                 cur.macroModeClose();
 835                 docstring const save_selection = grabAndEraseSelection(cur);
 836                 selClearOrDel(cur);
 837                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 838                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 839                 cur.posLeft();
 840                 cur.pushLeft(*cur.nextInset());
 841                 cur.niceInsert(save_selection);
 842 #else
 843                 if (currentMode() == Inset::TEXT_MODE) {
 844                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 845                         cur.message(_("create new math text environment ($...$)"));
 846                 } else {
 847                         handleFont(cur, cmd.argument(), "textrm");
 848                         cur.message(_("entered math text mode (textrm)"));
 849                 }
 850 #endif
 851                 break;
 852         }
 853
 854         case LFUN_MATH_SIZE:
 855 #if 0
 856                 recordUndo(cur);
 857                 cur.setSize(arg);
 858 #endif
 859                 break;
 860
 861         case LFUN_MATH_MATRIX: {
 862                 recordUndo(cur, Undo::ATOMIC);
 863                 unsigned int m = 1;
 864                 unsigned int n = 1;
 865                 docstring v_align;
 866                 docstring h_align;
 867                 idocstringstream is(cmd.argument());
 868                 is >> m >> n >> v_align >> h_align;
 869                 if (m < 1)
 870                         m = 1;
 871                 if (n < 1)
 872                         n = 1;
 873                 v_align += 'c';
 874                 cur.niceInsert(
 875                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 876                 break;
 877         }
 878
 879         case LFUN_MATH_DELIM: {
 880                 docstring ls;
 881                 docstring rs = support::split(cmd.argument(), ls, ' ');
 882                 // Reasonable default values
 883                 if (ls.empty())
 884                         ls = '(';
 885                 if (rs.empty())
 886                         rs = ')';
 887                 recordUndo(cur, Undo::ATOMIC);
 888                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 889                 break;
 890         }
 891
 892         case LFUN_MATH_BIGDELIM: {
 893                 docstring const lname  = from_utf8(cmd.getArg(0));
 894                 docstring const ldelim = from_utf8(cmd.getArg(1));
 895                 docstring const rname  = from_utf8(cmd.getArg(2));
 896                 docstring const rdelim = from_utf8(cmd.getArg(3));
 897                 latexkeys const * l = in_word_set(lname);
 898                 bool const have_l = l && l->inset == "big" &&
 899                                     InsetMathBig::isBigInsetDelim(ldelim);
 900                 l = in_word_set(rname);
 901                 bool const have_r = l && l->inset == "big" &&
 902                                     InsetMathBig::isBigInsetDelim(rdelim);
 903                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 904                 // or right delimiter.
 905                 if (have_l || have_r) {
 906                         recordUndo(cur, Undo::ATOMIC);
 907                         docstring const selection = grabAndEraseSelection(cur);
 908                         selClearOrDel(cur);
 909                         if (have_l)
 910                                 cur.insert(MathAtom(new InsetMathBig(lname,
 911                                                                 ldelim)));
 912                         cur.niceInsert(selection);
 913                         if (have_r)
 914                                 cur.insert(MathAtom(new InsetMathBig(rname,
 915                                                                 rdelim)));
 916                 }
 917                 // Don't call cur.undispatched() if we did nothing, this would
 918                 // lead to infinite recursion via LyXText::dispatch().
 919                 break;
 920         }
 921
 922         case LFUN_SPACE_INSERT:
 923         case LFUN_MATH_SPACE:
 924                 recordUndo(cur, Undo::ATOMIC);
 925                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 926                 break;
 927
 928         case LFUN_ERT_INSERT:
 929                 // interpret this as if a backslash was typed
 930                 recordUndo(cur, Undo::ATOMIC);
 931                 interpretChar(cur, '\\');
 932                 break;
 933
 934         case LFUN_MATH_SUBSCRIPT:
 935                 // interpret this as if a _ was typed
 936                 recordUndo(cur, Undo::ATOMIC);
 937                 interpretChar(cur, '_');
 938                 break;
 939
 940         case LFUN_MATH_SUPERSCRIPT:
 941                 // interpret this as if a ^ was typed
 942                 recordUndo(cur, Undo::ATOMIC);
 943                 interpretChar(cur, '^');
 944                 break;
 945
 946         case LFUN_QUOTE_INSERT:
 947                 // interpret this as if a straight " was typed
 948                 recordUndo(cur, Undo::ATOMIC);
 949                 interpretChar(cur, '\"');
 950                 break;
 951
 952 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 953 // handling such that "self-insert" works on "arbitrary stuff" too, and
 954 // math-insert only handles special math things like "matrix".
 955         case LFUN_MATH_INSERT: {
 956                 recordUndo(cur, Undo::ATOMIC);
 957                 if (cmd.argument() == "^" || cmd.argument() == "_") {
 958                         interpretChar(cur, cmd.argument()[0]);
 959                 } else
 960                         cur.niceInsert(cmd.argument());
 961                 break;
 962                 }
 963
 964         case LFUN_DIALOG_SHOW_NEW_INSET: {
 965                 docstring const & name = cmd.argument();
 966                 string data;
 967                 if (name == "ref") {
 968                         InsetMathRef tmp(name);
 969                         data = tmp.createDialogStr(to_utf8(name));
 970                 }
 971                 cur.bv().showInsetDialog(to_utf8(name), data, 0);
 972                 break;
 973         }
 974
 975         case LFUN_INSET_INSERT: {
 976                 MathData ar;
 977                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
 978                         recordUndo(cur);
 979                         cur.insert(ar);
 980                 } else
 981                         cur.undispatched();
 982                 break;
 983         }
 984
 985         default:
 986                 InsetMathDim::doDispatch(cur, cmd);
 987                 break;
 988         }
 989 }
 990
 991
 992 bool InsetMathNest::getStatus(Cursor & cur, FuncRequest const & cmd,
 993                 FuncStatus & flag) const
 994 {
 995         // the font related toggles
 996         //string tc = "mathnormal";
 997         bool ret = true;
 998         string const arg = to_utf8(cmd.argument());
 999         switch (cmd.action) {
1000         case LFUN_TABULAR_FEATURE:
1001                 flag.enabled(false);
1002                 break;
1003 #if 0
1004         case LFUN_TABULAR_FEATURE:
1005                 // FIXME: check temporarily disabled
1006                 // valign code
1007                 char align = mathcursor::valign();
1008                 if (align == '\0') {
1009                         enable = false;
1010                         break;
1011                 }
1012                 if (cmd.argument().empty()) {
1013                         flag.clear();
1014                         break;
1015                 }
1016                 if (!contains("tcb", cmd.argument()[0])) {
1017                         enable = false;
1018                         break;
1019                 }
1020                 flag.setOnOff(cmd.argument()[0] == align);
1021                 break;
1022 #endif
1023         /// We have to handle them since 1.4 blocks all unhandled actions
1024         case LFUN_FONT_ITAL:
1025         case LFUN_FONT_BOLD:
1026         case LFUN_FONT_SANS:
1027         case LFUN_FONT_EMPH:
1028         case LFUN_FONT_CODE:
1029         case LFUN_FONT_NOUN:
1030         case LFUN_FONT_ROMAN:
1031         case LFUN_FONT_DEFAULT:
1032                 flag.enabled(true);
1033                 break;
1034         case LFUN_MATH_MUTATE:
1035                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1036                 flag.setOnOff(false);
1037                 break;
1038
1039         // we just need to be in math mode to enable that
1040         case LFUN_MATH_SIZE:
1041         case LFUN_MATH_SPACE:
1042         case LFUN_MATH_LIMITS:
1043         case LFUN_MATH_NONUMBER:
1044         case LFUN_MATH_NUMBER:
1045         case LFUN_MATH_EXTERN:
1046                 flag.enabled(true);
1047                 break;
1048
1049         case LFUN_FONT_FRAK:
1050                 flag.enabled(currentMode() != TEXT_MODE);
1051                 break;
1052
1053         case LFUN_MATH_INSERT: {
1054                 bool const textarg =
1055                         arg == "\\textbf"   || arg == "\\textsf" ||
1056                         arg == "\\textrm"   || arg == "\\textmd" ||
1057                         arg == "\\textit"   || arg == "\\textsc" ||
1058                         arg == "\\textsl"   || arg == "\\textup" ||
1059                         arg == "\\texttt"   || arg == "\\textbb" ||
1060                         arg == "\\textnormal";
1061                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1062                 break;
1063         }
1064
1065         case LFUN_MATH_MATRIX:
1066                 flag.enabled(currentMode() == MATH_MODE);
1067                 break;
1068
1069         case LFUN_INSET_INSERT: {
1070                 // Don't test createMathInset_fromDialogStr(), since
1071                 // getStatus is not called with a valid reference and the
1072                 // dialog would not be applyable.
1073                 string const name = cmd.getArg(0);
1074                 flag.enabled(name == "ref");
1075                 break;
1076         }
1077
1078         case LFUN_MATH_DELIM:
1079         case LFUN_MATH_BIGDELIM:
1080                 // Don't do this with multi-cell selections
1081                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1082                 break;
1083
1084         default:
1085                 ret = false;
1086                 break;
1087         }
1088         return ret;
1089 }
1090
1091
1092 void InsetMathNest::edit(Cursor & cur, bool left)
1093 {
1094         cur.push(*this);
1095         cur.idx() = left ? 0 : cur.lastidx();
1096         cur.pos() = left ? 0 : cur.lastpos();
1097         cur.resetAnchor();
1098         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1099 }
1100
1101
1102 Inset * InsetMathNest::editXY(Cursor & cur, int x, int y)
1103 {
1104         int idx_min = 0;
1105         int dist_min = 1000000;
1106         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1107                 int const d = cell(i).dist(cur.bv(), x, y);
1108                 if (d < dist_min) {
1109                         dist_min = d;
1110                         idx_min = i;
1111                 }
1112         }
1113         MathData & ar = cell(idx_min);
1114         cur.push(*this);
1115         cur.idx() = idx_min;
1116         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1117
1118         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1119         if (dist_min == 0) {
1120                 // hit inside cell
1121                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1122                         if (ar[i]->covers(cur.bv(), x, y))
1123                                 return ar[i].nucleus()->editXY(cur, x, y);
1124         }
1125         return this;
1126 }
1127
1128
1129 void InsetMathNest::lfunMousePress(Cursor & cur, FuncRequest & cmd)
1130 {
1131         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1132         BufferView & bv = cur.bv();
1133         if (cmd.button() == mouse_button::button1) {
1134                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1135                 bv.mouseSetCursor(cur);
1136                 // Update the cursor update flags as needed:
1137                 //
1138                 // Update::Decoration: tells to update the decoration (visual box
1139                 //                     corners that define the inset)/
1140                 // Update::FitCursor: adjust the screen to the cursor position if
1141                 //                    needed
1142                 // cur.result().update(): don't overwrite previously set flags.
1143                 cur.updateFlags(Update::Decoration | Update::FitCursor | cur.result().update());
1144         } else if (cmd.button() == mouse_button::button2) {
1145                 MathData ar;
1146                 if (cap::selection()) {
1147                         // See comment in LyXText::dispatch why we do this
1148                         cap::copySelectionToStack();
1149                         cmd = FuncRequest(LFUN_PASTE, "0");
1150                         doDispatch(cur, cmd);
1151                 } else
1152                         asArray(theSelection().get(), ar);
1153
1154                 cur.insert(ar);
1155                 bv.mouseSetCursor(cur);
1156         }
1157 }
1158
1159
1160 void InsetMathNest::lfunMouseMotion(Cursor & cur, FuncRequest & cmd)
1161 {
1162         // only select with button 1
1163         if (cmd.button() == mouse_button::button1) {
1164                 Cursor & bvcur = cur.bv().cursor();
1165                 if (bvcur.anchor_.hasPart(cur)) {
1166                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1167                         bvcur.setCursor(cur);
1168                         bvcur.selection() = true;
1169                         //lyxerr << "MOTION " << bvcur << endl;
1170                 } else
1171                         cur.undispatched();
1172         }
1173 }
1174
1175
1176 void InsetMathNest::lfunMouseRelease(Cursor & cur, FuncRequest & cmd)
1177 {
1178         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1179
1180         if (cmd.button() == mouse_button::button1) {
1181                 if (!cur.selection())
1182                         cur.noUpdate();
1183                 else {
1184                         Cursor & bvcur = cur.bv().cursor();
1185                         bvcur.selection() = true;
1186                         cap::saveSelection(bvcur);
1187                 }
1188                 return;
1189         }
1190
1191         cur.undispatched();
1192 }
1193
1194
1195 bool InsetMathNest::interpretChar(Cursor & cur, char_type c)
1196 {
1197         //lyxerr << "interpret 2: '" << c << "'" << endl;
1198         docstring save_selection;
1199         if (c == '^' || c == '_')
1200                 save_selection = grabAndEraseSelection(cur);
1201
1202         cur.clearTargetX();
1203
1204         // handle macroMode
1205         if (cur.inMacroMode()) {
1206                 docstring name = cur.macroName();
1207
1208                 /// are we currently typing '#1' or '#2' or...?
1209                 if (name == "\\#") {
1210                         cur.backspace();
1211                         int n = c - '0';
1212                         if (n >= 1 && n <= 9)
1213                                 cur.insert(new MathMacroArgument(n));
1214                         return true;
1215                 }
1216
1217                 if (isAlphaASCII(c)) {
1218                         cur.activeMacro()->setName(name + docstring(1, c));
1219                         return true;
1220                 }
1221
1222                 // handle 'special char' macros
1223                 if (name == "\\") {
1224                         // remove the '\\'
1225                         if (c == '\\') {
1226                                 cur.backspace();
1227                                 if (currentMode() == InsetMath::TEXT_MODE)
1228                                         cur.niceInsert(createInsetMath("textbackslash"));
1229                                 else
1230                                         cur.niceInsert(createInsetMath("backslash"));
1231                         } else if (c == '{') {
1232                                 cur.backspace();
1233                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1234                         } else if (c == '%') {
1235                                 cur.backspace();
1236                                 cur.niceInsert(MathAtom(new InsetMathComment));
1237                         } else if (c == '#') {
1238                                 BOOST_ASSERT(cur.activeMacro());
1239                                 cur.activeMacro()->setName(name + docstring(1, c));
1240                         } else {
1241                                 cur.backspace();
1242                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1243                         }
1244                         return true;
1245                 }
1246
1247                 // One character big delimiters. The others are handled in
1248                 // interpretString().
1249                 latexkeys const * l = in_word_set(name.substr(1));
1250                 if (name[0] == '\\' && l && l->inset == "big") {
1251                         docstring delim;
1252                         switch (c) {
1253                         case '{':
1254                                 delim = from_ascii("\\{");
1255                                 break;
1256                         case '}':
1257                                 delim = from_ascii("\\}");
1258                                 break;
1259                         default:
1260                                 delim = docstring(1, c);
1261                                 break;
1262                         }
1263                         if (InsetMathBig::isBigInsetDelim(delim)) {
1264                                 // name + delim ared a valid InsetMathBig.
1265                                 // We can't use cur.macroModeClose() because
1266                                 // it does not handle delim.
1267                                 InsetMathUnknown * p = cur.activeMacro();
1268                                 p->finalize();
1269                                 --cur.pos();
1270                                 cur.cell().erase(cur.pos());
1271                                 cur.plainInsert(MathAtom(
1272                                         new InsetMathBig(name.substr(1), delim)));
1273                                 return true;
1274                         }
1275                 }
1276
1277                 // leave macro mode and try again if necessary
1278                 cur.macroModeClose();
1279                 if (c == '{')
1280                         cur.niceInsert(MathAtom(new InsetMathBrace));
1281                 else if (c != ' ')
1282                         interpretChar(cur, c);
1283                 return true;
1284         }
1285
1286         // This is annoying as one has to press <space> far too often.
1287         // Disable it.
1288
1289 #if 0
1290                 // leave autocorrect mode if necessary
1291                 if (autocorrect() && c == ' ') {
1292                         autocorrect() = false;
1293                         return true;
1294                 }
1295 #endif
1296
1297         // just clear selection on pressing the space bar
1298         if (cur.selection() && c == ' ') {
1299                 cur.selection() = false;
1300                 return true;
1301         }
1302
1303         selClearOrDel(cur);
1304
1305         if (c == '\\') {
1306                 //lyxerr << "starting with macro" << endl;
1307                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1308                 return true;
1309         }
1310
1311         if (c == '\n') {
1312                 if (currentMode() == InsetMath::TEXT_MODE)
1313                         cur.insert(c);
1314                 return true;
1315         }
1316
1317         if (c == ' ') {
1318                 if (currentMode() == InsetMath::TEXT_MODE) {
1319                         // insert spaces in text mode,
1320                         // but suppress direct insertion of two spaces in a row
1321                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1322                         // it is better than nothing...
1323                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ') {
1324                                 cur.insert(c);
1325                                 // FIXME: we have to enable full redraw here because of the
1326                                 // visual box corners that define the inset. If we know for
1327                                 // sure that we stay within the same cell we can optimize for
1328                                 // that using:
1329                                 //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1330                         }
1331                         return true;
1332                 }
1333                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1334                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
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                         return true;
1341                 }
1342
1343                 if (cur.popRight()) {
1344                         // FIXME: we have to enable full redraw here because of the
1345                         // visual box corners that define the inset. If we know for
1346                         // sure that we stay within the same cell we can optimize for
1347                         // that using:
1348                         //cur.updateFlags(Update::FitCursor);
1349                         return true;
1350                 }
1351
1352                 // if we are at the very end, leave the formula
1353                 return cur.pos() != cur.lastpos();
1354         }
1355
1356         // These shouldn't work in text mode:
1357         if (currentMode() != InsetMath::TEXT_MODE) {
1358                 if (c == '_') {
1359                         script(cur, false, save_selection);
1360                         return true;
1361                 }
1362                 if (c == '^') {
1363                         script(cur, true, save_selection);
1364                         return true;
1365                 }
1366                 if (c == '~') {
1367                         cur.niceInsert(createInsetMath("sim"));
1368                         return true;
1369                 }
1370         }
1371
1372         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1373             c == '%' || c == '_' || c == '^') {
1374                 cur.niceInsert(createInsetMath(docstring(1, c)));
1375                 return true;
1376         }
1377
1378
1379         // try auto-correction
1380         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1381         //      return true;
1382
1383         // no special circumstances, so insert the character without any fuss
1384         cur.insert(c);
1385         cur.autocorrect() = true;
1386         return true;
1387 }
1388
1389
1390 bool InsetMathNest::interpretString(Cursor & cur, docstring const & str)
1391 {
1392         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1393         // possible
1394         if (!cur.empty() && cur.pos() > 0 &&
1395             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1396                 if (InsetMathBig::isBigInsetDelim(str)) {
1397                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1398                         if (prev[0] == '\\') {
1399                                 prev = prev.substr(1);
1400                                 latexkeys const * l = in_word_set(prev);
1401                                 if (l && l->inset == "big") {
1402                                         cur.cell()[cur.pos() - 1] =
1403                                                 MathAtom(new InsetMathBig(prev, str));
1404                                         return true;
1405                                 }
1406                         }
1407                 }
1408         }
1409         return false;
1410 }
1411
1412
1413 bool InsetMathNest::script(Cursor & cur, bool up,
1414                 docstring const & save_selection)
1415 {
1416         // Hack to get \^ and \_ working
1417         //lyxerr << "handling script: up: " << up << endl;
1418         if (cur.inMacroMode() && cur.macroName() == "\\") {
1419                 if (up)
1420                         cur.niceInsert(createInsetMath("mathcircumflex"));
1421                 else
1422                         interpretChar(cur, '_');
1423                 return true;
1424         }
1425
1426         cur.macroModeClose();
1427         if (asScriptInset() && cur.idx() == 0) {
1428                 // we are in a nucleus of a script inset, move to _our_ script
1429                 InsetMathScript * inset = asScriptInset();
1430                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1431                 inset->ensure(up);
1432                 cur.idx() = inset->idxOfScript(up);
1433                 cur.pos() = 0;
1434         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1435                 --cur.pos();
1436                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1437                 cur.push(*inset);
1438                 inset->ensure(up);
1439                 cur.idx() = inset->idxOfScript(up);
1440                 cur.pos() = cur.lastpos();
1441         } else {
1442                 // convert the thing to our left to a scriptinset or create a new
1443                 // one if in the very first position of the array
1444                 if (cur.pos() == 0) {
1445                         //lyxerr << "new scriptinset" << endl;
1446                         cur.insert(new InsetMathScript(up));
1447                 } else {
1448                         //lyxerr << "converting prev atom " << endl;
1449                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1450                 }
1451                 --cur.pos();
1452                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1453                 // See comment in MathParser.cpp for special handling of {}-bases
1454
1455                 cur.push(*inset);
1456                 cur.idx() = 1;
1457                 cur.pos() = 0;
1458         }
1459         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1460         cur.niceInsert(save_selection);
1461         cur.resetAnchor();
1462         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1463         return true;
1464 }
1465
1466
1467 } // namespace lyx