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 "MathArray.h"
  22 #include "InsetMathDelim.h"
  23 #include "MathFactory.h"
  24 #include "InsetMathHull.h"
  25 #include "MathStream.h"
  26 #include "MathMacroArgument.h"
  27 //#include "InsetMathMBox.h"
  28 #include "MathParser.h"
  29 #include "InsetMathScript.h"
  30 #include "InsetMathSpace.h"
  31 #include "InsetMathSymbol.h"
  32 #include "MathSupport.h"
  33 #include "InsetMathUnknown.h"
  34 #include "InsetMathRef.h"
  35
  36 #include "BufferView.h"
  37 #include "CutAndPaste.h"
  38 #include "FuncStatus.h"
  39 #include "LColor.h"
  40 #include "bufferview_funcs.h"
  41 #include "coordcache.h"
  42 #include "cursor.h"
  43 #include "debug.h"
  44 #include "dispatchresult.h"
  45 #include "funcrequest.h"
  46 #include "gettext.h"
  47 #include "lyxtext.h"
  48 #include "outputparams.h"
  49 #include "undo.h"
  50
  51 #include "support/lstrings.h"
  52 #include "support/textutils.h"
  53
  54 #include "frontends/Clipboard.h"
  55 #include "frontends/Painter.h"
  56 #include "frontends/Selection.h"
  57
  58 #include "funcrequest.h"
  59 #include "lyxserver.h"
  60 #include "lyxsocket.h"
  61
  62 #include <sstream>
  63
  64
  65 namespace lyx {
  66
  67 using cap::copySelection;
  68 using cap::grabAndEraseSelection;
  69 using cap::cutSelection;
  70 using cap::replaceSelection;
  71 using cap::selClearOrDel;
  72
  73 using std::endl;
  74 using std::string;
  75 using std::istringstream;
  76
  77
  78 InsetMathNest::InsetMathNest(idx_type nargs)
  79         : cells_(nargs), lock_(false)
  80 {}
  81
  82
  83 InsetMath::idx_type InsetMathNest::nargs() const
  84 {
  85         return cells_.size();
  86 }
  87
  88
  89 void InsetMathNest::cursorPos(BufferView const & bv,
  90                 CursorSlice const & sl, bool /*boundary*/,
  91                 int & x, int & y) const
  92 {
  93 // FIXME: This is a hack. Ideally, the coord cache should not store
  94 // absolute positions, but relative ones. This would mean to call
  95 // setXY() not in MathArray::draw(), but in the parent insets' draw()
  96 // with the correctly adjusted x,y values. But this means that we'd have
  97 // to touch all (math)inset's draw() methods. Right now, we'll store
  98 // absolute value, and make them here relative, only to make them
  99 // absolute again when actually drawing the cursor. What a mess.
 100         BOOST_ASSERT(ptr_cmp(&sl.inset(), this));
 101         MathArray const & ar = sl.cell();
 102         CoordCache const & coord_cache = bv.coordCache();
 103         if (!coord_cache.getArrays().has(&ar)) {
 104                 // this can (semi-)legally happen if we just created this cell
 105                 // and it never has been drawn before. So don't ASSERT.
 106                 //lyxerr << "no cached data for array " << &ar << endl;
 107                 x = 0;
 108                 y = 0;
 109                 return;
 110         }
 111         Point const pt = coord_cache.getArrays().xy(&ar);
 112         if (!coord_cache.getInsets().has(this)) {
 113                 // same as above
 114                 //lyxerr << "no cached data for inset " << this << endl;
 115                 x = 0;
 116                 y = 0;
 117                 return;
 118         }
 119         Point const pt2 = coord_cache.getInsets().xy(this);
 120         //lyxerr << "retrieving position cache for MathArray "
 121         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 122         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 123         y = pt.y_ - pt2.y_;
 124 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 125 //              << " asc: " << ascent() << "  des: " << descent()
 126 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 127         // move cursor visually into empty cells ("blue rectangles");
 128         if (ar.empty())
 129                 x += 2;
 130 }
 131
 132
 133 void InsetMathNest::metrics(MetricsInfo const & mi) const
 134 {
 135         MetricsInfo m = mi;
 136         for (idx_type i = 0, n = nargs(); i != n; ++i)
 137                 cell(i).metrics(m);
 138 }
 139
 140
 141 bool InsetMathNest::idxNext(LCursor & cur) const
 142 {
 143         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 144         if (cur.idx() == cur.lastidx())
 145                 return false;
 146         ++cur.idx();
 147         cur.pos() = 0;
 148         return true;
 149 }
 150
 151
 152 bool InsetMathNest::idxRight(LCursor & cur) const
 153 {
 154         return idxNext(cur);
 155 }
 156
 157
 158 bool InsetMathNest::idxPrev(LCursor & cur) const
 159 {
 160         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 161         if (cur.idx() == 0)
 162                 return false;
 163         --cur.idx();
 164         cur.pos() = cur.lastpos();
 165         return true;
 166 }
 167
 168
 169 bool InsetMathNest::idxLeft(LCursor & cur) const
 170 {
 171         return idxPrev(cur);
 172 }
 173
 174
 175 bool InsetMathNest::idxFirst(LCursor & cur) const
 176 {
 177         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 178         if (nargs() == 0)
 179                 return false;
 180         cur.idx() = 0;
 181         cur.pos() = 0;
 182         return true;
 183 }
 184
 185
 186 bool InsetMathNest::idxLast(LCursor & cur) const
 187 {
 188         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 189         if (nargs() == 0)
 190                 return false;
 191         cur.idx() = cur.lastidx();
 192         cur.pos() = cur.lastpos();
 193         return true;
 194 }
 195
 196
 197 void InsetMathNest::dump() const
 198 {
 199         odocstringstream oss;
 200         WriteStream os(oss);
 201         os << "---------------------------------------------\n";
 202         write(os);
 203         os << "\n";
 204         for (idx_type i = 0, n = nargs(); i != n; ++i)
 205                 os << cell(i) << "\n";
 206         os << "---------------------------------------------\n";
 207         lyxerr << to_utf8(oss.str());
 208 }
 209
 210
 211 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 212 {
 213 #if 0
 214         if (lock_)
 215                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 216                                         LColor::mathlockbg);
 217 #endif
 218         setPosCache(pi, x, y);
 219 }
 220
 221
 222 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 223 {
 224         BufferView & bv = *pi.base.bv;
 225         // this should use the x/y values given, not the cached values
 226         LCursor & cur = bv.cursor();
 227         if (!cur.selection())
 228                 return;
 229         if (!ptr_cmp(&cur.inset(), this))
 230                 return;
 231
 232         // FIXME: hack to get position cache warm
 233         pi.pain.setDrawingEnabled(false);
 234         draw(pi, x, y);
 235         pi.pain.setDrawingEnabled(true);
 236
 237         CursorSlice s1 = cur.selBegin();
 238         CursorSlice s2 = cur.selEnd();
 239
 240         //lyxerr << "InsetMathNest::drawing selection: "
 241         //      << " s1: " << s1 << " s2: " << s2 << endl;
 242         if (s1.idx() == s2.idx()) {
 243                 MathArray const & c = cell(s1.idx());
 244                 int x1 = c.xo(bv) + c.pos2x(s1.pos());
 245                 int y1 = c.yo(bv) - c.ascent();
 246                 int x2 = c.xo(bv) + c.pos2x(s2.pos());
 247                 int y2 = c.yo(bv) + c.descent();
 248                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 249         //lyxerr << "InsetMathNest::drawing selection 3: "
 250         //      << " x1: " << x1 << " x2: " << x2
 251         //      << " y1: " << y1 << " y2: " << y2 << endl;
 252         } else {
 253                 for (idx_type i = 0; i < nargs(); ++i) {
 254                         if (idxBetween(i, s1.idx(), s2.idx())) {
 255                                 MathArray const & c = cell(i);
 256                                 int x1 = c.xo(bv);
 257                                 int y1 = c.yo(bv) - c.ascent();
 258                                 int x2 = c.xo(bv) + c.width();
 259                                 int y2 = c.yo(bv) + c.descent();
 260                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 261                         }
 262                 }
 263         }
 264 }
 265
 266
 267 void InsetMathNest::validate(LaTeXFeatures & features) const
 268 {
 269         for (idx_type i = 0; i < nargs(); ++i)
 270                 cell(i).validate(features);
 271 }
 272
 273
 274 void InsetMathNest::replace(ReplaceData & rep)
 275 {
 276         for (idx_type i = 0; i < nargs(); ++i)
 277                 cell(i).replace(rep);
 278 }
 279
 280
 281 bool InsetMathNest::contains(MathArray const & ar) const
 282 {
 283         for (idx_type i = 0; i < nargs(); ++i)
 284                 if (cell(i).contains(ar))
 285                         return true;
 286         return false;
 287 }
 288
 289
 290 bool InsetMathNest::lock() const
 291 {
 292         return lock_;
 293 }
 294
 295
 296 void InsetMathNest::lock(bool l)
 297 {
 298         lock_ = l;
 299 }
 300
 301
 302 bool InsetMathNest::isActive() const
 303 {
 304         return nargs() > 0;
 305 }
 306
 307
 308 MathArray InsetMathNest::glue() const
 309 {
 310         MathArray ar;
 311         for (size_t i = 0; i < nargs(); ++i)
 312                 ar.append(cell(i));
 313         return ar;
 314 }
 315
 316
 317 void InsetMathNest::write(WriteStream & os) const
 318 {
 319         os << '\\' << name().c_str();
 320         for (size_t i = 0; i < nargs(); ++i)
 321                 os << '{' << cell(i) << '}';
 322         if (nargs() == 0)
 323                 os.pendingSpace(true);
 324         if (lock_ && !os.latex()) {
 325                 os << "\\lyxlock";
 326                 os.pendingSpace(true);
 327         }
 328 }
 329
 330
 331 void InsetMathNest::normalize(NormalStream & os) const
 332 {
 333         os << '[' << name().c_str();
 334         for (size_t i = 0; i < nargs(); ++i)
 335                 os << ' ' << cell(i);
 336         os << ']';
 337 }
 338
 339
 340 int InsetMathNest::latex(Buffer const &, odocstream & os,
 341                         OutputParams const & runparams) const
 342 {
 343         WriteStream wi(os, runparams.moving_arg, true);
 344         write(wi);
 345         return wi.line();
 346 }
 347
 348
 349 bool InsetMathNest::notifyCursorLeaves(LCursor & /*cur*/)
 350 {
 351 #ifdef WITH_WARNINGS
 352 #warning look here
 353 #endif
 354 #if 0
 355         MathArray & ar = cur.cell();
 356         // remove base-only "scripts"
 357         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 358                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 359                 if (p && p->nargs() == 1) {
 360                         MathArray ar = p->nuc();
 361                         erase(i);
 362                         insert(i, ar);
 363                         cur.adjust(i, ar.size() - 1);
 364                 }
 365         }
 366
 367         // glue adjacent font insets of the same kind
 368         for (pos_type i = 0; i + 1 < size(); ++i) {
 369                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 370                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 371                 if (p && q && p->name() == q->name()) {
 372                         p->cell(0).append(q->cell(0));
 373                         erase(i + 1);
 374                         cur.adjust(i, -1);
 375                 }
 376         }
 377 #endif
 378         return false;
 379 }
 380
 381
 382 void InsetMathNest::handleFont
 383         (LCursor & cur, docstring const & arg, char const * const font)
 384 {
 385         handleFont(cur, arg, from_ascii(font));
 386 }
 387
 388
 389 void InsetMathNest::handleFont
 390         (LCursor & cur, docstring const & arg, docstring const & font)
 391 {
 392         // this whole function is a hack and won't work for incremental font
 393         // changes...
 394
 395         if (cur.inset().asInsetMath()->name() == font) {
 396                 recordUndoInset(cur, Undo::ATOMIC);
 397                 cur.handleFont(to_utf8(font));
 398         } else {
 399                 recordUndo(cur, Undo::ATOMIC);
 400                 cur.handleNest(createInsetMath(font));
 401                 cur.insert(arg);
 402         }
 403 }
 404
 405
 406 void InsetMathNest::handleFont2(LCursor & cur, docstring const & arg)
 407 {
 408         recordUndo(cur, Undo::ATOMIC);
 409         LyXFont font;
 410         bool b;
 411         bv_funcs::string2font(to_utf8(arg), font, b);
 412         if (font.color() != LColor::inherit) {
 413                 MathAtom at = MathAtom(new InsetMathColor(true, font.color()));
 414                 cur.handleNest(at, 0);
 415         }
 416 }
 417
 418
 419 void InsetMathNest::doDispatch(LCursor & cur, FuncRequest & cmd)
 420 {
 421         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 422         //CursorSlice sl = cur.current();
 423
 424         switch (cmd.action) {
 425
 426         case LFUN_PASTE: {
 427                 recordUndo(cur);
 428                 cur.message(_("Paste"));
 429                 replaceSelection(cur);
 430                 docstring topaste;
 431                 if (cmd.argument().empty() && !theClipboard().isInternal())
 432                         topaste = theClipboard().getAsText();
 433                 else {
 434                         size_t n = 0;
 435                         idocstringstream is(cmd.argument());
 436                         is >> n;
 437                         topaste = cap::getSelection(cur.buffer(), n);
 438                 }
 439                 cur.niceInsert(topaste);
 440                 cur.clearSelection(); // bug 393
 441                 cur.bv().switchKeyMap();
 442                 finishUndo();
 443                 break;
 444         }
 445
 446         case LFUN_CUT:
 447                 recordUndo(cur);
 448                 cutSelection(cur, true, true);
 449                 cur.message(_("Cut"));
 450                 // Prevent stale position >= size crash
 451                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 452                 cur.normalize();
 453                 break;
 454
 455         case LFUN_COPY:
 456                 copySelection(cur);
 457                 cur.message(_("Copy"));
 458                 break;
 459
 460         case LFUN_MOUSE_PRESS:
 461                 lfunMousePress(cur, cmd);
 462                 break;
 463
 464         case LFUN_MOUSE_MOTION:
 465                 lfunMouseMotion(cur, cmd);
 466                 break;
 467
 468         case LFUN_MOUSE_RELEASE:
 469                 lfunMouseRelease(cur, cmd);
 470                 break;
 471
 472         case LFUN_FINISHED_LEFT:
 473                 cur.bv().cursor() = cur;
 474                 break;
 475
 476         case LFUN_FINISHED_RIGHT:
 477                 ++cur.pos();
 478                 cur.bv().cursor() = cur;
 479                 break;
 480
 481         case LFUN_FINISHED_UP:
 482                 cur.bv().cursor() = cur;
 483                 break;
 484
 485         case LFUN_FINISHED_DOWN:
 486                 ++cur.pos();
 487                 cur.bv().cursor() = cur;
 488                 break;
 489
 490         case LFUN_CHAR_FORWARD:
 491                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 492         case LFUN_CHAR_FORWARD_SELECT:
 493                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 494                 cur.autocorrect() = false;
 495                 cur.clearTargetX();
 496                 cur.macroModeClose();
 497                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 498                         cur.pushLeft(*cur.nextAtom().nucleus());
 499                         cur.inset().idxFirst(cur);
 500                 } else if (cur.posRight() || idxRight(cur)
 501                         || cur.popRight() || cur.selection())
 502                         ;
 503                 else {
 504                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 505                         cur.undispatched();
 506                 }
 507                 break;
 508
 509         case LFUN_CHAR_BACKWARD:
 510                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 511         case LFUN_CHAR_BACKWARD_SELECT:
 512                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 513                 cur.autocorrect() = false;
 514                 cur.clearTargetX();
 515                 cur.macroModeClose();
 516                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 517                         cur.posLeft();
 518                         cur.push(*cur.nextAtom().nucleus());
 519                         cur.inset().idxLast(cur);
 520                 } else if (cur.posLeft() || idxLeft(cur)
 521                         || cur.popLeft() || cur.selection())
 522                         ;
 523                 else {
 524                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 525                         cur.undispatched();
 526                 }
 527                 break;
 528
 529         case LFUN_UP:
 530                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 531         case LFUN_UP_SELECT:
 532                 // FIXME Tried to use clearTargetX and macroModeClose, crashed on cur.up()
 533                 if (cur.inMacroMode()) {
 534                         // Make Helge happy
 535                         cur.macroModeClose();
 536                         break;
 537                 }
 538                 cur.selHandle(cmd.action == LFUN_UP_SELECT);
 539                 if (!cur.up()) {
 540                         cmd = FuncRequest(LFUN_FINISHED_UP);
 541                         cur.undispatched();
 542                 }
 543                 // fixes bug 1598. Please check!
 544                 cur.normalize();
 545                 break;
 546
 547         case LFUN_DOWN:
 548                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 549         case LFUN_DOWN_SELECT:
 550                 if (cur.inMacroMode()) {
 551                         cur.macroModeClose();
 552                         break;
 553                 }
 554                 cur.selHandle(cmd.action == LFUN_DOWN_SELECT);
 555                 if (!cur.down()) {
 556                         cmd = FuncRequest(LFUN_FINISHED_DOWN);
 557                         cur.undispatched();
 558                 }
 559                 // fixes bug 1598. Please check!
 560                 cur.normalize();
 561                 break;
 562
 563         case LFUN_MOUSE_DOUBLE:
 564         case LFUN_MOUSE_TRIPLE:
 565         case LFUN_WORD_SELECT:
 566                 cur.pos() = 0;
 567                 cur.idx() = 0;
 568                 cur.resetAnchor();
 569                 cur.selection() = true;
 570                 cur.pos() = cur.lastpos();
 571                 cur.idx() = cur.lastidx();
 572                 cap::saveSelection(cur);
 573                 break;
 574
 575         case LFUN_PARAGRAPH_UP:
 576         case LFUN_PARAGRAPH_DOWN:
 577                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 578         case LFUN_PARAGRAPH_UP_SELECT:
 579         case LFUN_PARAGRAPH_DOWN_SELECT:
 580                 break;
 581
 582         case LFUN_LINE_BEGIN:
 583         case LFUN_WORD_BACKWARD:
 584                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 585         case LFUN_LINE_BEGIN_SELECT:
 586         case LFUN_WORD_BACKWARD_SELECT:
 587                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 588                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 589                 cur.macroModeClose();
 590                 if (cur.pos() != 0) {
 591                         cur.pos() = 0;
 592                 } else if (cur.col() != 0) {
 593                         cur.idx() -= cur.col();
 594                         cur.pos() = 0;
 595                 } else if (cur.idx() != 0) {
 596                         cur.idx() = 0;
 597                         cur.pos() = 0;
 598                 } else {
 599                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 600                         cur.undispatched();
 601                 }
 602                 break;
 603
 604         case LFUN_WORD_FORWARD:
 605         case LFUN_LINE_END:
 606                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 607         case LFUN_WORD_FORWARD_SELECT:
 608         case LFUN_LINE_END_SELECT:
 609                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 610                                 cmd.action == LFUN_LINE_END_SELECT);
 611                 cur.macroModeClose();
 612                 cur.clearTargetX();
 613                 if (cur.pos() != cur.lastpos()) {
 614                         cur.pos() = cur.lastpos();
 615                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 616                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 617                         cur.pos() = cur.lastpos();
 618                 } else if (cur.idx() != cur.lastidx()) {
 619                         cur.idx() = cur.lastidx();
 620                         cur.pos() = cur.lastpos();
 621                 } else {
 622                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 623                         cur.undispatched();
 624                 }
 625                 break;
 626
 627         case LFUN_SCREEN_UP_SELECT:
 628         case LFUN_SCREEN_UP:
 629                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 630                 cur.undispatched();
 631                 break;
 632
 633         case LFUN_SCREEN_DOWN_SELECT:
 634         case LFUN_SCREEN_DOWN:
 635                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 636                 cur.undispatched();
 637                 break;
 638
 639         case LFUN_CELL_FORWARD:
 640                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 641                 cur.inset().idxNext(cur);
 642                 break;
 643
 644         case LFUN_CELL_BACKWARD:
 645                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 646                 cur.inset().idxPrev(cur);
 647                 break;
 648
 649         case LFUN_WORD_DELETE_BACKWARD:
 650         case LFUN_CHAR_DELETE_BACKWARD:
 651                 if (cur.pos() == 0)
 652                         // May affect external cell:
 653                         recordUndoInset(cur, Undo::ATOMIC);
 654                 else
 655                         recordUndo(cur, Undo::ATOMIC);
 656                 // if the inset can not be removed from within, delete it
 657                 if (!cur.backspace()) {
 658                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 659                         cur.innerText()->dispatch(cur, cmd);
 660                 }
 661                 break;
 662
 663         case LFUN_WORD_DELETE_FORWARD:
 664         case LFUN_CHAR_DELETE_FORWARD:
 665                 if (cur.pos() == cur.lastpos())
 666                         // May affect external cell:
 667                         recordUndoInset(cur, Undo::ATOMIC);
 668                 else
 669                         recordUndo(cur, Undo::ATOMIC);
 670                 // if the inset can not be removed from within, delete it
 671                 if (!cur.erase()) {
 672                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 673                         cur.innerText()->dispatch(cur, cmd);
 674                 }
 675                 break;
 676
 677         case LFUN_ESCAPE:
 678                 if (cur.selection())
 679                         cur.clearSelection();
 680                 else  {
 681                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 682                         cur.undispatched();
 683                 }
 684                 break;
 685
 686         case LFUN_INSET_TOGGLE:
 687                 recordUndo(cur);
 688                 lock(!lock());
 689                 cur.popRight();
 690                 break;
 691
 692         case LFUN_SELF_INSERT:
 693                 if (cmd.argument().size() != 1) {
 694                         recordUndo(cur);
 695                         docstring const arg = cmd.argument();
 696                         if (!interpretString(cur, arg))
 697                                 cur.insert(arg);
 698                         break;
 699                 }
 700                 // Don't record undo steps if we are in macro mode and
 701                 // cmd.argument is the next character of the macro name.
 702                 // Otherwise we'll get an invalid cursor if we undo after
 703                 // the macro was finished and the macro is a known command,
 704                 // e.g. sqrt. LCursor::macroModeClose replaces in this case
 705                 // the InsetMathUnknown with name "frac" by an empty
 706                 // InsetMathFrac -> a pos value > 0 is invalid.
 707                 // A side effect is that an undo before the macro is finished
 708                 // undoes the complete macro, not only the last character.
 709                 if (!cur.inMacroMode())
 710                         recordUndo(cur);
 711
 712                 // spacial handling of space. If we insert an inset
 713                 // via macro mode, we want to put the cursor inside it
 714                 // if relevant. Think typing "\frac<space>".
 715                 if (cmd.argument()[0] == ' '
 716                     && cur.inMacroMode() && cur.macroName() != "\\"
 717                     && cur.macroModeClose()) {
 718                         MathAtom const atom = cur.prevAtom();
 719                         if (atom->asNestInset() && atom->nargs() > 0) {
 720                                 cur.posLeft();
 721                                 cur.pushLeft(*cur.nextInset());
 722                         }
 723                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 724                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 725                         cur.undispatched();
 726                 }
 727                 break;
 728
 729         //case LFUN_SERVER_GET_XY:
 730         //      sprintf(dispatch_buffer, "%d %d",);
 731         //      break;
 732
 733         case LFUN_SERVER_SET_XY: {
 734                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 735                 int x = 0;
 736                 int y = 0;
 737                 istringstream is(to_utf8(cmd.argument()));
 738                 is >> x >> y;
 739                 cur.setScreenPos(x, y);
 740                 break;
 741         }
 742
 743         // Special casing for superscript in case of LyX handling
 744         // dead-keys:
 745         case LFUN_ACCENT_CIRCUMFLEX:
 746                 if (cmd.argument().empty()) {
 747                         // do superscript if LyX handles
 748                         // deadkeys
 749                         recordUndo(cur, Undo::ATOMIC);
 750                         script(cur, true, grabAndEraseSelection(cur));
 751                 }
 752                 break;
 753
 754         case LFUN_ACCENT_UMLAUT:
 755         case LFUN_ACCENT_ACUTE:
 756         case LFUN_ACCENT_GRAVE:
 757         case LFUN_ACCENT_BREVE:
 758         case LFUN_ACCENT_DOT:
 759         case LFUN_ACCENT_MACRON:
 760         case LFUN_ACCENT_CARON:
 761         case LFUN_ACCENT_TILDE:
 762         case LFUN_ACCENT_CEDILLA:
 763         case LFUN_ACCENT_CIRCLE:
 764         case LFUN_ACCENT_UNDERDOT:
 765         case LFUN_ACCENT_TIE:
 766         case LFUN_ACCENT_OGONEK:
 767         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 768                 break;
 769
 770         //  Math fonts
 771         case LFUN_FONT_FREE_APPLY:
 772         case LFUN_FONT_FREE_UPDATE:
 773                 handleFont2(cur, cmd.argument());
 774                 break;
 775
 776         case LFUN_FONT_BOLD:
 777                 if (currentMode() == TEXT_MODE)
 778                         handleFont(cur, cmd.argument(), "textbf");
 779                 else
 780                         handleFont(cur, cmd.argument(), "mathbf");
 781                 break;
 782         case LFUN_FONT_SANS:
 783                 if (currentMode() == TEXT_MODE)
 784                         handleFont(cur, cmd.argument(), "textsf");
 785                 else
 786                         handleFont(cur, cmd.argument(), "mathsf");
 787                 break;
 788         case LFUN_FONT_EMPH:
 789                 if (currentMode() == TEXT_MODE)
 790                         handleFont(cur, cmd.argument(), "emph");
 791                 else
 792                         handleFont(cur, cmd.argument(), "mathcal");
 793                 break;
 794         case LFUN_FONT_ROMAN:
 795                 if (currentMode() == TEXT_MODE)
 796                         handleFont(cur, cmd.argument(), "textrm");
 797                 else
 798                         handleFont(cur, cmd.argument(), "mathrm");
 799                 break;
 800         case LFUN_FONT_CODE:
 801                 if (currentMode() == TEXT_MODE)
 802                         handleFont(cur, cmd.argument(), "texttt");
 803                 else
 804                         handleFont(cur, cmd.argument(), "mathtt");
 805                 break;
 806         case LFUN_FONT_FRAK:
 807                 handleFont(cur, cmd.argument(), "mathfrak");
 808                 break;
 809         case LFUN_FONT_ITAL:
 810                 if (currentMode() == TEXT_MODE)
 811                         handleFont(cur, cmd.argument(), "textit");
 812                 else
 813                         handleFont(cur, cmd.argument(), "mathit");
 814                 break;
 815         case LFUN_FONT_NOUN:
 816                 if (currentMode() == TEXT_MODE)
 817                         // FIXME: should be "noun"
 818                         handleFont(cur, cmd.argument(), "textsc");
 819                 else
 820                         handleFont(cur, cmd.argument(), "mathbb");
 821                 break;
 822         /*
 823         case LFUN_FONT_FREE_APPLY:
 824                 handleFont(cur, cmd.argument(), "textrm");
 825                 break;
 826         */
 827         case LFUN_FONT_DEFAULT:
 828                 handleFont(cur, cmd.argument(), "textnormal");
 829                 break;
 830
 831         case LFUN_MATH_MODE: {
 832 #if 1
 833                 // ignore math-mode on when already in math mode
 834                 if (currentMode() == InsetBase::MATH_MODE && cmd.argument() == "on")
 835                         break;
 836                 cur.macroModeClose();
 837                 docstring const save_selection = grabAndEraseSelection(cur);
 838                 selClearOrDel(cur);
 839                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 840                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 841                 cur.posLeft();
 842                 cur.pushLeft(*cur.nextInset());
 843                 cur.niceInsert(save_selection);
 844 #else
 845                 if (currentMode() == InsetBase::TEXT_MODE) {
 846                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 847                         cur.message(_("create new math text environment ($...$)"));
 848                 } else {
 849                         handleFont(cur, cmd.argument(), "textrm");
 850                         cur.message(_("entered math text mode (textrm)"));
 851                 }
 852 #endif
 853                 break;
 854         }
 855
 856         case LFUN_MATH_SIZE:
 857 #if 0
 858                 recordUndo(cur);
 859                 cur.setSize(arg);
 860 #endif
 861                 break;
 862
 863         case LFUN_MATH_MATRIX: {
 864                 recordUndo(cur, Undo::ATOMIC);
 865                 unsigned int m = 1;
 866                 unsigned int n = 1;
 867                 docstring v_align;
 868                 docstring h_align;
 869                 idocstringstream is(cmd.argument());
 870                 is >> m >> n >> v_align >> h_align;
 871                 if (m < 1)
 872                         m = 1;
 873                 if (n < 1)
 874                         n = 1;
 875                 v_align += 'c';
 876                 cur.niceInsert(
 877                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 878                 break;
 879         }
 880
 881         case LFUN_MATH_DELIM: {
 882                 docstring ls;
 883                 docstring rs = support::split(cmd.argument(), ls, ' ');
 884                 // Reasonable default values
 885                 if (ls.empty())
 886                         ls = '(';
 887                 if (rs.empty())
 888                         rs = ')';
 889                 recordUndo(cur, Undo::ATOMIC);
 890                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 891                 break;
 892         }
 893
 894         case LFUN_MATH_BIGDELIM: {
 895                 docstring const lname  = from_utf8(cmd.getArg(0));
 896                 docstring const ldelim = from_utf8(cmd.getArg(1));
 897                 docstring const rname  = from_utf8(cmd.getArg(2));
 898                 docstring const rdelim = from_utf8(cmd.getArg(3));
 899                 latexkeys const * l = in_word_set(lname);
 900                 bool const have_l = l && l->inset == "big" &&
 901                                     InsetMathBig::isBigInsetDelim(ldelim);
 902                 l = in_word_set(rname);
 903                 bool const have_r = l && l->inset == "big" &&
 904                                     InsetMathBig::isBigInsetDelim(rdelim);
 905                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 906                 // or right delimiter.
 907                 if (have_l || have_r) {
 908                         recordUndo(cur, Undo::ATOMIC);
 909                         docstring const selection = grabAndEraseSelection(cur);
 910                         selClearOrDel(cur);
 911                         if (have_l)
 912                                 cur.insert(MathAtom(new InsetMathBig(lname,
 913                                                                 ldelim)));
 914                         cur.niceInsert(selection);
 915                         if (have_r)
 916                                 cur.insert(MathAtom(new InsetMathBig(rname,
 917                                                                 rdelim)));
 918                 }
 919                 // Don't call cur.undispatched() if we did nothing, this would
 920                 // lead to infinite recursion via LyXText::dispatch().
 921                 break;
 922         }
 923
 924         case LFUN_SPACE_INSERT:
 925         case LFUN_MATH_SPACE:
 926                 recordUndo(cur, Undo::ATOMIC);
 927                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 928                 break;
 929
 930         case LFUN_ERT_INSERT:
 931                 // interpret this as if a backslash was typed
 932                 recordUndo(cur, Undo::ATOMIC);
 933                 interpretChar(cur, '\\');
 934                 break;
 935
 936         case LFUN_MATH_SUBSCRIPT:
 937                 // interpret this as if a _ was typed
 938                 recordUndo(cur, Undo::ATOMIC);
 939                 interpretChar(cur, '_');
 940                 break;
 941
 942         case LFUN_MATH_SUPERSCRIPT:
 943                 // interpret this as if a ^ was typed
 944                 recordUndo(cur, Undo::ATOMIC);
 945                 interpretChar(cur, '^');
 946                 break;
 947
 948         case LFUN_QUOTE_INSERT:
 949                 // interpret this as if a straight " was typed
 950                 recordUndo(cur, Undo::ATOMIC);
 951                 interpretChar(cur, '\"');
 952                 break;
 953
 954 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 955 // handling such that "self-insert" works on "arbitrary stuff" too, and
 956 // math-insert only handles special math things like "matrix".
 957         case LFUN_MATH_INSERT: {
 958                 recordUndo(cur, Undo::ATOMIC);
 959                 if (cmd.argument() == "^" || cmd.argument() == "_") {
 960                         interpretChar(cur, cmd.argument()[0]);
 961                 } else
 962                         cur.niceInsert(cmd.argument());
 963                 break;
 964                 }
 965
 966         case LFUN_DIALOG_SHOW_NEW_INSET: {
 967                 docstring const & name = cmd.argument();
 968                 string data;
 969                 if (name == "ref") {
 970                         RefInset tmp(name);
 971                         data = tmp.createDialogStr(to_utf8(name));
 972                 }
 973                 cur.bv().showInsetDialog(to_utf8(name), data, 0);
 974                 break;
 975         }
 976
 977         case LFUN_INSET_INSERT: {
 978                 MathArray ar;
 979                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
 980                         recordUndo(cur);
 981                         cur.insert(ar);
 982                 } else
 983                         cur.undispatched();
 984                 break;
 985         }
 986
 987         default:
 988                 InsetMathDim::doDispatch(cur, cmd);
 989                 break;
 990         }
 991 }
 992
 993
 994 bool InsetMathNest::getStatus(LCursor & cur, FuncRequest const & cmd,
 995                 FuncStatus & flag) const
 996 {
 997         // the font related toggles
 998         //string tc = "mathnormal";
 999         bool ret = true;
1000         string const arg = to_utf8(cmd.argument());
1001         switch (cmd.action) {
1002         case LFUN_TABULAR_FEATURE:
1003                 flag.enabled(false);
1004                 break;
1005 #if 0
1006         case LFUN_TABULAR_FEATURE:
1007                 // FIXME: check temporarily disabled
1008                 // valign code
1009                 char align = mathcursor::valign();
1010                 if (align == '\0') {
1011                         enable = false;
1012                         break;
1013                 }
1014                 if (cmd.argument().empty()) {
1015                         flag.clear();
1016                         break;
1017                 }
1018                 if (!contains("tcb", cmd.argument()[0])) {
1019                         enable = false;
1020                         break;
1021                 }
1022                 flag.setOnOff(cmd.argument()[0] == align);
1023                 break;
1024 #endif
1025         /// We have to handle them since 1.4 blocks all unhandled actions
1026         case LFUN_FONT_ITAL:
1027         case LFUN_FONT_BOLD:
1028         case LFUN_FONT_SANS:
1029         case LFUN_FONT_EMPH:
1030         case LFUN_FONT_CODE:
1031         case LFUN_FONT_NOUN:
1032         case LFUN_FONT_ROMAN:
1033         case LFUN_FONT_DEFAULT:
1034                 flag.enabled(true);
1035                 break;
1036         case LFUN_MATH_MUTATE:
1037                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1038                 flag.setOnOff(false);
1039                 break;
1040
1041         // we just need to be in math mode to enable that
1042         case LFUN_MATH_SIZE:
1043         case LFUN_MATH_SPACE:
1044         case LFUN_MATH_LIMITS:
1045         case LFUN_MATH_NONUMBER:
1046         case LFUN_MATH_NUMBER:
1047         case LFUN_MATH_EXTERN:
1048                 flag.enabled(true);
1049                 break;
1050
1051         case LFUN_FONT_FRAK:
1052                 flag.enabled(currentMode() != TEXT_MODE);
1053                 break;
1054
1055         case LFUN_MATH_INSERT: {
1056                 bool const textarg =
1057                         arg == "\\textbf"   || arg == "\\textsf" ||
1058                         arg == "\\textrm"   || arg == "\\textmd" ||
1059                         arg == "\\textit"   || arg == "\\textsc" ||
1060                         arg == "\\textsl"   || arg == "\\textup" ||
1061                         arg == "\\texttt"   || arg == "\\textbb" ||
1062                         arg == "\\textnormal";
1063                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1064                 break;
1065         }
1066
1067         case LFUN_MATH_MATRIX:
1068                 flag.enabled(currentMode() == MATH_MODE);
1069                 break;
1070
1071         case LFUN_INSET_INSERT: {
1072                 // Don't test createMathInset_fromDialogStr(), since
1073                 // getStatus is not called with a valid reference and the
1074                 // dialog would not be applyable.
1075                 string const name = cmd.getArg(0);
1076                 flag.enabled(name == "ref");
1077                 break;
1078         }
1079
1080         case LFUN_MATH_DELIM:
1081         case LFUN_MATH_BIGDELIM:
1082                 // Don't do this with multi-cell selections
1083                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1084                 break;
1085
1086         default:
1087                 ret = false;
1088                 break;
1089         }
1090         return ret;
1091 }
1092
1093
1094 void InsetMathNest::edit(LCursor & cur, bool left)
1095 {
1096         cur.push(*this);
1097         cur.idx() = left ? 0 : cur.lastidx();
1098         cur.pos() = left ? 0 : cur.lastpos();
1099         cur.resetAnchor();
1100         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1101 }
1102
1103
1104 InsetBase * InsetMathNest::editXY(LCursor & cur, int x, int y)
1105 {
1106         int idx_min = 0;
1107         int dist_min = 1000000;
1108         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1109                 int const d = cell(i).dist(cur.bv(), x, y);
1110                 if (d < dist_min) {
1111                         dist_min = d;
1112                         idx_min = i;
1113                 }
1114         }
1115         MathArray & ar = cell(idx_min);
1116         cur.push(*this);
1117         cur.idx() = idx_min;
1118         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1119
1120         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1121         if (dist_min == 0) {
1122                 // hit inside cell
1123                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1124                         if (ar[i]->covers(cur.bv(), x, y))
1125                                 return ar[i].nucleus()->editXY(cur, x, y);
1126         }
1127         return this;
1128 }
1129
1130
1131 void InsetMathNest::lfunMousePress(LCursor & cur, FuncRequest & cmd)
1132 {
1133         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1134         BufferView & bv = cur.bv();
1135         if (cmd.button() == mouse_button::button1) {
1136                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1137                 bv.mouseSetCursor(cur);
1138                 // Update the cursor update flags as needed:
1139                 //
1140                 // Update::Decoration: tells to update the decoration (visual box
1141                 //                     corners that define the inset)/
1142                 // Update::FitCursor: adjust the screen to the cursor position if
1143                 //                    needed
1144                 // cur.result().update(): don't overwrite previously set flags.
1145                 cur.updateFlags(Update::Decoration | Update::FitCursor | cur.result().update());
1146         } else if (cmd.button() == mouse_button::button2) {
1147                 MathArray ar;
1148                 if (cap::selection()) {
1149                         // See comment in LyXText::dispatch why we do this
1150                         cap::copySelectionToStack();
1151                         cmd = FuncRequest(LFUN_PASTE, "0");
1152                         doDispatch(cur, cmd);
1153                 } else
1154                         asArray(theSelection().get(), ar);
1155
1156                 cur.insert(ar);
1157                 bv.mouseSetCursor(cur);
1158         }
1159 }
1160
1161
1162 void InsetMathNest::lfunMouseMotion(LCursor & cur, FuncRequest & cmd)
1163 {
1164         // only select with button 1
1165         if (cmd.button() == mouse_button::button1) {
1166                 LCursor & bvcur = cur.bv().cursor();
1167                 if (bvcur.anchor_.hasPart(cur)) {
1168                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1169                         bvcur.setCursor(cur);
1170                         bvcur.selection() = true;
1171                         //lyxerr << "MOTION " << bvcur << endl;
1172                 } else
1173                         cur.undispatched();
1174         }
1175 }
1176
1177
1178 void InsetMathNest::lfunMouseRelease(LCursor & cur, FuncRequest & cmd)
1179 {
1180         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1181
1182         if (cmd.button() == mouse_button::button1) {
1183                 if (!cur.selection())
1184                         cur.noUpdate();
1185                 else {
1186                         LCursor & bvcur = cur.bv().cursor();
1187                         bvcur.selection() = true;
1188                         cap::saveSelection(bvcur);
1189                 }
1190                 return;
1191         }
1192
1193         cur.undispatched();
1194 }
1195
1196
1197 bool InsetMathNest::interpretChar(LCursor & cur, char_type c)
1198 {
1199         //lyxerr << "interpret 2: '" << c << "'" << endl;
1200         docstring save_selection;
1201         if (c == '^' || c == '_')
1202                 save_selection = grabAndEraseSelection(cur);
1203
1204         cur.clearTargetX();
1205
1206         // handle macroMode
1207         if (cur.inMacroMode()) {
1208                 docstring name = cur.macroName();
1209
1210                 /// are we currently typing '#1' or '#2' or...?
1211                 if (name == "\\#") {
1212                         cur.backspace();
1213                         int n = c - '0';
1214                         if (n >= 1 && n <= 9)
1215                                 cur.insert(new MathMacroArgument(n));
1216                         return true;
1217                 }
1218
1219                 if (isAlphaASCII(c)) {
1220                         cur.activeMacro()->setName(name + docstring(1, c));
1221                         return true;
1222                 }
1223
1224                 // handle 'special char' macros
1225                 if (name == "\\") {
1226                         // remove the '\\'
1227                         if (c == '\\') {
1228                                 cur.backspace();
1229                                 if (currentMode() == InsetMath::TEXT_MODE)
1230                                         cur.niceInsert(createInsetMath("textbackslash"));
1231                                 else
1232                                         cur.niceInsert(createInsetMath("backslash"));
1233                         } else if (c == '{') {
1234                                 cur.backspace();
1235                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1236                         } else if (c == '%') {
1237                                 cur.backspace();
1238                                 cur.niceInsert(MathAtom(new InsetMathComment));
1239                         } else if (c == '#') {
1240                                 BOOST_ASSERT(cur.activeMacro());
1241                                 cur.activeMacro()->setName(name + docstring(1, c));
1242                         } else {
1243                                 cur.backspace();
1244                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1245                         }
1246                         return true;
1247                 }
1248
1249                 // One character big delimiters. The others are handled in
1250                 // interpretString().
1251                 latexkeys const * l = in_word_set(name.substr(1));
1252                 if (name[0] == '\\' && l && l->inset == "big") {
1253                         docstring delim;
1254                         switch (c) {
1255                         case '{':
1256                                 delim = from_ascii("\\{");
1257                                 break;
1258                         case '}':
1259                                 delim = from_ascii("\\}");
1260                                 break;
1261                         default:
1262                                 delim = docstring(1, c);
1263                                 break;
1264                         }
1265                         if (InsetMathBig::isBigInsetDelim(delim)) {
1266                                 // name + delim ared a valid InsetMathBig.
1267                                 // We can't use cur.macroModeClose() because
1268                                 // it does not handle delim.
1269                                 InsetMathUnknown * p = cur.activeMacro();
1270                                 p->finalize();
1271                                 --cur.pos();
1272                                 cur.cell().erase(cur.pos());
1273                                 cur.plainInsert(MathAtom(
1274                                         new InsetMathBig(name.substr(1), delim)));
1275                                 return true;
1276                         }
1277                 }
1278
1279                 // leave macro mode and try again if necessary
1280                 cur.macroModeClose();
1281                 if (c == '{')
1282                         cur.niceInsert(MathAtom(new InsetMathBrace));
1283                 else if (c != ' ')
1284                         interpretChar(cur, c);
1285                 return true;
1286         }
1287
1288         // This is annoying as one has to press <space> far too often.
1289         // Disable it.
1290
1291 #if 0
1292                 // leave autocorrect mode if necessary
1293                 if (autocorrect() && c == ' ') {
1294                         autocorrect() = false;
1295                         return true;
1296                 }
1297 #endif
1298
1299         // just clear selection on pressing the space bar
1300         if (cur.selection() && c == ' ') {
1301                 cur.selection() = false;
1302                 return true;
1303         }
1304
1305         selClearOrDel(cur);
1306
1307         if (c == '\\') {
1308                 //lyxerr << "starting with macro" << endl;
1309                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1310                 return true;
1311         }
1312
1313         if (c == '\n') {
1314                 if (currentMode() == InsetMath::TEXT_MODE)
1315                         cur.insert(c);
1316                 return true;
1317         }
1318
1319         if (c == ' ') {
1320                 if (currentMode() == InsetMath::TEXT_MODE) {
1321                         // insert spaces in text mode,
1322                         // but suppress direct insertion of two spaces in a row
1323                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1324                         // it is better than nothing...
1325                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ') {
1326                                 cur.insert(c);
1327                                 // FIXME: we have to enable full redraw here because of the
1328                                 // visual box corners that define the inset. If we know for
1329                                 // sure that we stay within the same cell we can optimize for
1330                                 // that using:
1331                                 //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1332                         }
1333                         return true;
1334                 }
1335                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1336                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1337                         // FIXME: we have to enable full redraw here because of the
1338                         // visual box corners that define the inset. If we know for
1339                         // sure that we stay within the same cell we can optimize for
1340                         // that using:
1341                         //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1342                         return true;
1343                 }
1344
1345                 if (cur.popRight()) {
1346                         // FIXME: we have to enable full redraw here because of the
1347                         // visual box corners that define the inset. If we know for
1348                         // sure that we stay within the same cell we can optimize for
1349                         // that using:
1350                         //cur.updateFlags(Update::FitCursor);
1351                         return true;
1352                 }
1353
1354                 // if we are at the very end, leave the formula
1355                 return cur.pos() != cur.lastpos();
1356         }
1357
1358         // These shouldn't work in text mode:
1359         if (currentMode() != InsetMath::TEXT_MODE) {
1360                 if (c == '_') {
1361                         script(cur, false, save_selection);
1362                         return true;
1363                 }
1364                 if (c == '^') {
1365                         script(cur, true, save_selection);
1366                         return true;
1367                 }
1368                 if (c == '~') {
1369                         cur.niceInsert(createInsetMath("sim"));
1370                         return true;
1371                 }
1372         }
1373
1374         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1375             c == '%' || c == '_' || c == '^') {
1376                 cur.niceInsert(createInsetMath(docstring(1, c)));
1377                 return true;
1378         }
1379
1380
1381         // try auto-correction
1382         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1383         //      return true;
1384
1385         // no special circumstances, so insert the character without any fuss
1386         cur.insert(c);
1387         cur.autocorrect() = true;
1388         return true;
1389 }
1390
1391
1392 bool InsetMathNest::interpretString(LCursor & cur, docstring const & str)
1393 {
1394         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1395         // possible
1396         if (!cur.empty() && cur.pos() > 0 &&
1397             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1398                 if (InsetMathBig::isBigInsetDelim(str)) {
1399                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1400                         if (prev[0] == '\\') {
1401                                 prev = prev.substr(1);
1402                                 latexkeys const * l = in_word_set(prev);
1403                                 if (l && l->inset == "big") {
1404                                         cur.cell()[cur.pos() - 1] =
1405                                                 MathAtom(new InsetMathBig(prev, str));
1406                                         return true;
1407                                 }
1408                         }
1409                 }
1410         }
1411         return false;
1412 }
1413
1414
1415 bool InsetMathNest::script(LCursor & cur, bool up,
1416                 docstring const & save_selection)
1417 {
1418         // Hack to get \^ and \_ working
1419         //lyxerr << "handling script: up: " << up << endl;
1420         if (cur.inMacroMode() && cur.macroName() == "\\") {
1421                 if (up)
1422                         cur.niceInsert(createInsetMath("mathcircumflex"));
1423                 else
1424                         interpretChar(cur, '_');
1425                 return true;
1426         }
1427
1428         cur.macroModeClose();
1429         if (asScriptInset() && cur.idx() == 0) {
1430                 // we are in a nucleus of a script inset, move to _our_ script
1431                 InsetMathScript * inset = asScriptInset();
1432                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1433                 inset->ensure(up);
1434                 cur.idx() = inset->idxOfScript(up);
1435                 cur.pos() = 0;
1436         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1437                 --cur.pos();
1438                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1439                 cur.push(*inset);
1440                 inset->ensure(up);
1441                 cur.idx() = inset->idxOfScript(up);
1442                 cur.pos() = cur.lastpos();
1443         } else {
1444                 // convert the thing to our left to a scriptinset or create a new
1445                 // one if in the very first position of the array
1446                 if (cur.pos() == 0) {
1447                         //lyxerr << "new scriptinset" << endl;
1448                         cur.insert(new InsetMathScript(up));
1449                 } else {
1450                         //lyxerr << "converting prev atom " << endl;
1451                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1452                 }
1453                 --cur.pos();
1454                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1455                 // See comment in MathParser.cpp for special handling of {}-bases
1456
1457                 cur.push(*inset);
1458                 cur.idx() = 1;
1459                 cur.pos() = 0;
1460         }
1461         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1462         cur.niceInsert(save_selection);
1463         cur.resetAnchor();
1464         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1465         return true;
1466 }
1467
1468
1469 } // namespace lyx