src/mathed/InsetMathNest.C

   1 /**
   2  * \file InsetMathNest.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author André Pönitz
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "InsetMathNest.h"
  14
  15 #include "InsetMathArray.h"
  16 #include "InsetMathBig.h"
  17 #include "InsetMathBox.h"
  18 #include "InsetMathBrace.h"
  19 #include "InsetMathColor.h"
  20 #include "InsetMathComment.h"
  21 #include "MathData.h"
  22 #include "InsetMathDelim.h"
  23 #include "MathFactory.h"
  24 #include "InsetMathHull.h"
  25 #include "MathStream.h"
  26 #include "MathMacroArgument.h"
  27 //#include "InsetMathMBox.h"
  28 #include "MathParser.h"
  29 #include "InsetMathScript.h"
  30 #include "InsetMathSpace.h"
  31 #include "InsetMathSymbol.h"
  32 #include "MathSupport.h"
  33 #include "InsetMathUnknown.h"
  34 #include "InsetMathRef.h"
  35
  36 #include "BufferView.h"
  37 #include "CutAndPaste.h"
  38 #include "FuncStatus.h"
  39 #include "LColor.h"
  40 #include "bufferview_funcs.h"
  41 #include "coordcache.h"
  42 #include "cursor.h"
  43 #include "debug.h"
  44 #include "dispatchresult.h"
  45 #include "funcrequest.h"
  46 #include "gettext.h"
  47 #include "lyxtext.h"
  48 #include "outputparams.h"
  49 #include "undo.h"
  50
  51 #include "support/lstrings.h"
  52
  53 #include "frontends/Painter.h"
  54 #include "frontends/Selection.h"
  55
  56 #include "funcrequest.h"
  57 #include "lyxserver.h"
  58 #include "lyxsocket.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 MathArray & InsetMathNest::cell(idx_type i)
  88 {
  89         return cells_[i];
  90 }
  91
  92
  93 MathArray const & InsetMathNest::cell(idx_type i) const
  94 {
  95         return cells_[i];
  96 }
  97
  98
  99 void InsetMathNest::cursorPos(BufferView const & bv,
 100                 CursorSlice const & sl, bool /*boundary*/,
 101                 int & x, int & y) const
 102 {
 103 // FIXME: This is a hack. Ideally, the coord cache should not store
 104 // absolute positions, but relative ones. This would mean to call
 105 // setXY() not in MathArray::draw(), but in the parent insets' draw()
 106 // with the correctly adjusted x,y values. But this means that we'd have
 107 // to touch all (math)inset's draw() methods. Right now, we'll store
 108 // absolute value, and make them here relative, only to make them
 109 // absolute again when actually drawing the cursor. What a mess.
 110         BOOST_ASSERT(ptr_cmp(&sl.inset(), this));
 111         MathArray const & ar = sl.cell();
 112         CoordCache const & coord_cache = bv.coordCache();
 113         if (!coord_cache.getArrays().has(&ar)) {
 114                 // this can (semi-)legally happen if we just created this cell
 115                 // and it never has been drawn before. So don't ASSERT.
 116                 //lyxerr << "no cached data for array " << &ar << endl;
 117                 x = 0;
 118                 y = 0;
 119                 return;
 120         }
 121         Point const pt = coord_cache.getArrays().xy(&ar);
 122         if (!coord_cache.getInsets().has(this)) {
 123                 // same as above
 124                 //lyxerr << "no cached data for inset " << this << endl;
 125                 x = 0;
 126                 y = 0;
 127                 return;
 128         }
 129         Point const pt2 = coord_cache.getInsets().xy(this);
 130         //lyxerr << "retrieving position cache for MathArray "
 131         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 132         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 133         y = pt.y_ - pt2.y_;
 134 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 135 //              << " asc: " << ascent() << "  des: " << descent()
 136 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 137         // move cursor visually into empty cells ("blue rectangles");
 138         if (ar.empty())
 139                 x += 2;
 140 }
 141
 142
 143 void InsetMathNest::metrics(MetricsInfo const & mi) const
 144 {
 145         MetricsInfo m = mi;
 146         for (idx_type i = 0, n = nargs(); i != n; ++i)
 147                 cell(i).metrics(m);
 148 }
 149
 150
 151 bool InsetMathNest::idxNext(LCursor & cur) const
 152 {
 153         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 154         if (cur.idx() == cur.lastidx())
 155                 return false;
 156         ++cur.idx();
 157         cur.pos() = 0;
 158         return true;
 159 }
 160
 161
 162 bool InsetMathNest::idxRight(LCursor & cur) const
 163 {
 164         return idxNext(cur);
 165 }
 166
 167
 168 bool InsetMathNest::idxPrev(LCursor & cur) const
 169 {
 170         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 171         if (cur.idx() == 0)
 172                 return false;
 173         --cur.idx();
 174         cur.pos() = cur.lastpos();
 175         return true;
 176 }
 177
 178
 179 bool InsetMathNest::idxLeft(LCursor & cur) const
 180 {
 181         return idxPrev(cur);
 182 }
 183
 184
 185 bool InsetMathNest::idxFirst(LCursor & cur) const
 186 {
 187         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 188         if (nargs() == 0)
 189                 return false;
 190         cur.idx() = 0;
 191         cur.pos() = 0;
 192         return true;
 193 }
 194
 195
 196 bool InsetMathNest::idxLast(LCursor & cur) const
 197 {
 198         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 199         if (nargs() == 0)
 200                 return false;
 201         cur.idx() = cur.lastidx();
 202         cur.pos() = cur.lastpos();
 203         return true;
 204 }
 205
 206
 207 void InsetMathNest::dump() const
 208 {
 209         odocstringstream oss;
 210         WriteStream os(oss);
 211         os << "---------------------------------------------\n";
 212         write(os);
 213         os << "\n";
 214         for (idx_type i = 0, n = nargs(); i != n; ++i)
 215                 os << cell(i) << "\n";
 216         os << "---------------------------------------------\n";
 217         lyxerr << to_utf8(oss.str());
 218 }
 219
 220
 221 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 222 {
 223 #if 0
 224         if (lock_)
 225                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 226                                         LColor::mathlockbg);
 227 #endif
 228         setPosCache(pi, x, y);
 229 }
 230
 231
 232 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 233 {
 234         BufferView & bv = *pi.base.bv;
 235         // this should use the x/y values given, not the cached values
 236         LCursor & cur = bv.cursor();
 237         if (!cur.selection())
 238                 return;
 239         if (!ptr_cmp(&cur.inset(), this))
 240                 return;
 241
 242         // FIXME: hack to get position cache warm
 243         pi.pain.setDrawingEnabled(false);
 244         draw(pi, x, y);
 245         pi.pain.setDrawingEnabled(true);
 246
 247         CursorSlice s1 = cur.selBegin();
 248         CursorSlice s2 = cur.selEnd();
 249
 250         //lyxerr << "InsetMathNest::drawing selection: "
 251         //      << " s1: " << s1 << " s2: " << s2 << endl;
 252         if (s1.idx() == s2.idx()) {
 253                 MathArray const & c = cell(s1.idx());
 254                 int x1 = c.xo(bv) + c.pos2x(s1.pos());
 255                 int y1 = c.yo(bv) - c.ascent();
 256                 int x2 = c.xo(bv) + c.pos2x(s2.pos());
 257                 int y2 = c.yo(bv) + c.descent();
 258                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 259         //lyxerr << "InsetMathNest::drawing selection 3: "
 260         //      << " x1: " << x1 << " x2: " << x2
 261         //      << " y1: " << y1 << " y2: " << y2 << endl;
 262         } else {
 263                 for (idx_type i = 0; i < nargs(); ++i) {
 264                         if (idxBetween(i, s1.idx(), s2.idx())) {
 265                                 MathArray const & c = cell(i);
 266                                 int x1 = c.xo(bv);
 267                                 int y1 = c.yo(bv) - c.ascent();
 268                                 int x2 = c.xo(bv) + c.width();
 269                                 int y2 = c.yo(bv) + c.descent();
 270                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 271                         }
 272                 }
 273         }
 274 }
 275
 276
 277 void InsetMathNest::validate(LaTeXFeatures & features) const
 278 {
 279         for (idx_type i = 0; i < nargs(); ++i)
 280                 cell(i).validate(features);
 281 }
 282
 283
 284 void InsetMathNest::replace(ReplaceData & rep)
 285 {
 286         for (idx_type i = 0; i < nargs(); ++i)
 287                 cell(i).replace(rep);
 288 }
 289
 290
 291 bool InsetMathNest::contains(MathArray const & ar) const
 292 {
 293         for (idx_type i = 0; i < nargs(); ++i)
 294                 if (cell(i).contains(ar))
 295                         return true;
 296         return false;
 297 }
 298
 299
 300 bool InsetMathNest::lock() const
 301 {
 302         return lock_;
 303 }
 304
 305
 306 void InsetMathNest::lock(bool l)
 307 {
 308         lock_ = l;
 309 }
 310
 311
 312 bool InsetMathNest::isActive() const
 313 {
 314         return nargs() > 0;
 315 }
 316
 317
 318 MathArray InsetMathNest::glue() const
 319 {
 320         MathArray ar;
 321         for (size_t i = 0; i < nargs(); ++i)
 322                 ar.append(cell(i));
 323         return ar;
 324 }
 325
 326
 327 void InsetMathNest::write(WriteStream & os) const
 328 {
 329         os << '\\' << name().c_str();
 330         for (size_t i = 0; i < nargs(); ++i)
 331                 os << '{' << cell(i) << '}';
 332         if (nargs() == 0)
 333                 os.pendingSpace(true);
 334         if (lock_ && !os.latex()) {
 335                 os << "\\lyxlock";
 336                 os.pendingSpace(true);
 337         }
 338 }
 339
 340
 341 void InsetMathNest::normalize(NormalStream & os) const
 342 {
 343         os << '[' << name().c_str();
 344         for (size_t i = 0; i < nargs(); ++i)
 345                 os << ' ' << cell(i);
 346         os << ']';
 347 }
 348
 349
 350 int InsetMathNest::latex(Buffer const &, odocstream & os,
 351                         OutputParams const & runparams) const
 352 {
 353         WriteStream wi(os, runparams.moving_arg, true);
 354         write(wi);
 355         return wi.line();
 356 }
 357
 358
 359 bool InsetMathNest::notifyCursorLeaves(LCursor & /*cur*/)
 360 {
 361 #ifdef WITH_WARNINGS
 362 #warning look here
 363 #endif
 364 #if 0
 365         MathArray & ar = cur.cell();
 366         // remove base-only "scripts"
 367         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 368                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 369                 if (p && p->nargs() == 1) {
 370                         MathArray ar = p->nuc();
 371                         erase(i);
 372                         insert(i, ar);
 373                         cur.adjust(i, ar.size() - 1);
 374                 }
 375         }
 376
 377         // glue adjacent font insets of the same kind
 378         for (pos_type i = 0; i + 1 < size(); ++i) {
 379                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 380                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 381                 if (p && q && p->name() == q->name()) {
 382                         p->cell(0).append(q->cell(0));
 383                         erase(i + 1);
 384                         cur.adjust(i, -1);
 385                 }
 386         }
 387 #endif
 388         return false;
 389 }
 390
 391
 392 void InsetMathNest::handleFont
 393         (LCursor & cur, docstring const & arg, char const * const font)
 394 {
 395         handleFont(cur, arg, from_ascii(font));
 396 }
 397
 398
 399 void InsetMathNest::handleFont
 400         (LCursor & cur, docstring const & arg, docstring const & font)
 401 {
 402         // this whole function is a hack and won't work for incremental font
 403         // changes...
 404         recordUndo(cur, Undo::ATOMIC);
 405
 406         if (cur.inset().asInsetMath()->name() == font)
 407                 cur.handleFont(to_utf8(font));
 408         else {
 409                 cur.handleNest(createInsetMath(font));
 410                 cur.insert(arg);
 411         }
 412 }
 413
 414
 415 void InsetMathNest::handleFont2(LCursor & cur, docstring const & arg)
 416 {
 417         recordUndo(cur, Undo::ATOMIC);
 418         LyXFont font;
 419         bool b;
 420         bv_funcs::string2font(to_utf8(arg), font, b);
 421         if (font.color() != LColor::inherit) {
 422                 MathAtom at = MathAtom(new InsetMathColor(true, font.color()));
 423                 cur.handleNest(at, 0);
 424         }
 425 }
 426
 427
 428 void InsetMathNest::doDispatch(LCursor & cur, FuncRequest & cmd)
 429 {
 430         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 431         //CursorSlice sl = cur.current();
 432
 433         switch (cmd.action) {
 434
 435         case LFUN_PASTE: {
 436                 recordUndo(cur);
 437                 cur.message(_("Paste"));
 438                 replaceSelection(cur);
 439                 size_t n = 0;
 440                 istringstream is(to_utf8(cmd.argument()));
 441                 is >> n;
 442                 docstring const selection = cap::getSelection(cur.buffer(), n);
 443                 cur.niceInsert(selection);
 444                 cur.clearSelection(); // bug 393
 445                 cur.bv().switchKeyMap();
 446                 finishUndo();
 447                 break;
 448         }
 449
 450         case LFUN_CUT:
 451                 recordUndo(cur);
 452                 cutSelection(cur, true, true);
 453                 cur.message(_("Cut"));
 454                 // Prevent stale position >= size crash
 455                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 456                 cur.normalize();
 457                 break;
 458
 459         case LFUN_COPY:
 460                 copySelection(cur);
 461                 // FIXME UNICODE
 462                 cur.message(_("Copy"));
 463                 break;
 464
 465         case LFUN_MOUSE_PRESS:
 466                 lfunMousePress(cur, cmd);
 467                 break;
 468
 469         case LFUN_MOUSE_MOTION:
 470                 lfunMouseMotion(cur, cmd);
 471                 break;
 472
 473         case LFUN_MOUSE_RELEASE:
 474                 lfunMouseRelease(cur, cmd);
 475                 break;
 476
 477         case LFUN_FINISHED_LEFT:
 478                 cur.bv().cursor() = cur;
 479                 break;
 480
 481         case LFUN_FINISHED_RIGHT:
 482                 ++cur.pos();
 483                 cur.bv().cursor() = cur;
 484                 break;
 485
 486         case LFUN_FINISHED_UP:
 487                 cur.bv().cursor() = cur;
 488                 break;
 489
 490         case LFUN_FINISHED_DOWN:
 491                 ++cur.pos();
 492                 cur.bv().cursor() = cur;
 493                 break;
 494
 495         case LFUN_CHAR_FORWARD:
 496                 // FIXME: we have to enable full redraw here because of the
 497                 // visual box corners that define the inset. If we know for
 498                 // sure that we stay within the same cell we can optimize for
 499                 // that using:
 500                 //cur.updateFlags(Update::FitCursor);
 501         case LFUN_CHAR_FORWARD_SELECT:
 502                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 503                 cur.autocorrect() = false;
 504                 cur.clearTargetX();
 505                 cur.macroModeClose();
 506                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 507                         cur.pushLeft(*cur.nextAtom().nucleus());
 508                         cur.inset().idxFirst(cur);
 509                 } else if (cur.posRight() || idxRight(cur)
 510                         || cur.popRight() || cur.selection())
 511                         ;
 512                 else {
 513                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 514                         cur.undispatched();
 515                 }
 516                 break;
 517
 518         case LFUN_CHAR_BACKWARD:
 519                 // FIXME: we have to enable full redraw here because of the
 520                 // visual box corners that define the inset. If we know for
 521                 // sure that we stay within the same cell we can optimize for
 522                 // that using:
 523                 //cur.updateFlags(Update::FitCursor);
 524         case LFUN_CHAR_BACKWARD_SELECT:
 525                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 526                 cur.autocorrect() = false;
 527                 cur.clearTargetX();
 528                 cur.macroModeClose();
 529                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 530                         cur.posLeft();
 531                         cur.push(*cur.nextAtom().nucleus());
 532                         cur.inset().idxLast(cur);
 533                 } else if (cur.posLeft() || idxLeft(cur)
 534                         || cur.popLeft() || cur.selection())
 535                         ;
 536                 else {
 537                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 538                         cur.undispatched();
 539                 }
 540                 break;
 541
 542         case LFUN_UP:
 543                 // FIXME: we have to enable full redraw here because of the
 544                 // visual box corners that define the inset. If we know for
 545                 // sure that we stay within the same cell we can optimize for
 546                 // that using:
 547                 //cur.updateFlags(Update::FitCursor);
 548         case LFUN_UP_SELECT:
 549                 // FIXME Tried to use clearTargetX and macroModeClose, crashed on cur.up()
 550                 if (cur.inMacroMode()) {
 551                         // Make Helge happy
 552                         cur.macroModeClose();
 553                         break;
 554                 }
 555                 cur.selHandle(cmd.action == LFUN_UP_SELECT);
 556                 if (!cur.up()) {
 557                         cmd = FuncRequest(LFUN_FINISHED_UP);
 558                         cur.undispatched();
 559                 }
 560                 // fixes bug 1598. Please check!
 561                 cur.normalize();
 562                 break;
 563
 564         case LFUN_DOWN:
 565                 // FIXME: we have to enable full redraw here because of the
 566                 // visual box corners that define the inset. If we know for
 567                 // sure that we stay within the same cell we can optimize for
 568                 // that using:
 569                 //cur.updateFlags(Update::FitCursor);
 570         case LFUN_DOWN_SELECT:
 571                 if (cur.inMacroMode()) {
 572                         cur.macroModeClose();
 573                         break;
 574                 }
 575                 cur.selHandle(cmd.action == LFUN_DOWN_SELECT);
 576                 if (!cur.down()) {
 577                         cmd = FuncRequest(LFUN_FINISHED_DOWN);
 578                         cur.undispatched();
 579                 }
 580                 // fixes bug 1598. Please check!
 581                 cur.normalize();
 582                 break;
 583
 584         case LFUN_MOUSE_DOUBLE:
 585         case LFUN_MOUSE_TRIPLE:
 586         case LFUN_WORD_SELECT:
 587                 cur.pos() = 0;
 588                 cur.idx() = 0;
 589                 cur.resetAnchor();
 590                 cur.selection() = true;
 591                 cur.pos() = cur.lastpos();
 592                 cur.idx() = cur.lastidx();
 593                 break;
 594
 595         case LFUN_PARAGRAPH_UP:
 596         case LFUN_PARAGRAPH_DOWN:
 597                 // FIXME: we have to enable full redraw here because of the
 598                 // visual box corners that define the inset. If we know for
 599                 // sure that we stay within the same cell we can optimize for
 600                 // that using:
 601                 //cur.updateFlags(Update::FitCursor);
 602         case LFUN_PARAGRAPH_UP_SELECT:
 603         case LFUN_PARAGRAPH_DOWN_SELECT:
 604                 break;
 605
 606         case LFUN_LINE_BEGIN:
 607         case LFUN_WORD_BACKWARD:
 608                 // FIXME: we have to enable full redraw here because of the
 609                 // visual box corners that define the inset. If we know for
 610                 // sure that we stay within the same cell we can optimize for
 611                 // that using:
 612                 //cur.updateFlags(Update::FitCursor);
 613         case LFUN_LINE_BEGIN_SELECT:
 614         case LFUN_WORD_BACKWARD_SELECT:
 615                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 616                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 617                 cur.macroModeClose();
 618                 if (cur.pos() != 0) {
 619                         cur.pos() = 0;
 620                 } else if (cur.col() != 0) {
 621                         cur.idx() -= cur.col();
 622                         cur.pos() = 0;
 623                 } else if (cur.idx() != 0) {
 624                         cur.idx() = 0;
 625                         cur.pos() = 0;
 626                 } else {
 627                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 628                         cur.undispatched();
 629                 }
 630                 break;
 631
 632         case LFUN_WORD_FORWARD:
 633         case LFUN_LINE_END:
 634                 // FIXME: we have to enable full redraw here because of the
 635                 // visual box corners that define the inset. If we know for
 636                 // sure that we stay within the same cell we can optimize for
 637                 // that using:
 638                 //cur.updateFlags(Update::FitCursor);
 639         case LFUN_WORD_FORWARD_SELECT:
 640         case LFUN_LINE_END_SELECT:
 641                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 642                                 cmd.action == LFUN_LINE_END_SELECT);
 643                 cur.macroModeClose();
 644                 cur.clearTargetX();
 645                 if (cur.pos() != cur.lastpos()) {
 646                         cur.pos() = cur.lastpos();
 647                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 648                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 649                         cur.pos() = cur.lastpos();
 650                 } else if (cur.idx() != cur.lastidx()) {
 651                         cur.idx() = cur.lastidx();
 652                         cur.pos() = cur.lastpos();
 653                 } else {
 654                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 655                         cur.undispatched();
 656                 }
 657                 break;
 658
 659         case LFUN_SCREEN_UP_SELECT:
 660         case LFUN_SCREEN_UP:
 661                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 662                 cur.undispatched();
 663                 break;
 664
 665         case LFUN_SCREEN_DOWN_SELECT:
 666         case LFUN_SCREEN_DOWN:
 667                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 668                 cur.undispatched();
 669                 break;
 670
 671         case LFUN_CELL_FORWARD:
 672                 // FIXME: we have to enable full redraw here because of the
 673                 // visual box corners that define the inset. If we know for
 674                 // sure that we stay within the same cell we can optimize for
 675                 // that using:
 676                 //cur.updateFlags(Update::FitCursor);
 677                 cur.inset().idxNext(cur);
 678                 break;
 679
 680         case LFUN_CELL_BACKWARD:
 681                 // FIXME: we have to enable full redraw here because of the
 682                 // visual box corners that define the inset. If we know for
 683                 // sure that we stay within the same cell we can optimize for
 684                 // that using:
 685                 //cur.updateFlags(Update::FitCursor);
 686                 cur.inset().idxPrev(cur);
 687                 break;
 688
 689         case LFUN_WORD_DELETE_BACKWARD:
 690         case LFUN_CHAR_DELETE_BACKWARD:
 691                 if (cur.pos() == 0)
 692                         // May affect external cell:
 693                         recordUndoInset(cur, Undo::ATOMIC);
 694                 else
 695                         recordUndo(cur, Undo::ATOMIC);
 696                 // if the inset can not be removed from within, delete it
 697                 if (!cur.backspace()) {
 698                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 699                         cur.bv().getLyXText()->dispatch(cur, cmd);
 700                 }
 701                 break;
 702
 703         case LFUN_WORD_DELETE_FORWARD:
 704         case LFUN_CHAR_DELETE_FORWARD:
 705                 if (cur.pos() == cur.lastpos())
 706                         // May affect external cell:
 707                         recordUndoInset(cur, Undo::ATOMIC);
 708                 else
 709                         recordUndo(cur, Undo::ATOMIC);
 710                 // if the inset can not be removed from within, delete it
 711                 if (!cur.erase()) {
 712                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 713                         cur.bv().getLyXText()->dispatch(cur, cmd);
 714                 }
 715                 break;
 716
 717         case LFUN_ESCAPE:
 718                 if (cur.selection())
 719                         cur.clearSelection();
 720                 else  {
 721                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 722                         cur.undispatched();
 723                 }
 724                 break;
 725
 726         case LFUN_INSET_TOGGLE:
 727                 recordUndo(cur);
 728                 lock(!lock());
 729                 cur.popRight();
 730                 break;
 731
 732         case LFUN_SELF_INSERT:
 733                 if (cmd.argument().size() != 1) {
 734                         recordUndo(cur);
 735                         docstring const arg = cmd.argument();
 736                         if (!interpretString(cur, arg))
 737                                 cur.insert(arg);
 738                         break;
 739                 }
 740                 // Don't record undo steps if we are in macro mode and
 741                 // cmd.argument is the next character of the macro name.
 742                 // Otherwise we'll get an invalid cursor if we undo after
 743                 // the macro was finished and the macro is a known command,
 744                 // e.g. sqrt. LCursor::macroModeClose replaces in this case
 745                 // the InsetMathUnknown with name "frac" by an empty
 746                 // InsetMathFrac -> a pos value > 0 is invalid.
 747                 // A side effect is that an undo before the macro is finished
 748                 // undoes the complete macro, not only the last character.
 749                 if (!cur.inMacroMode())
 750                         recordUndo(cur);
 751
 752                 // spacial handling of space. If we insert an inset
 753                 // via macro mode, we want to put the cursor inside it
 754                 // if relevant. Think typing "\frac<space>".
 755                 if (cmd.argument()[0] == ' '
 756                     && cur.inMacroMode() && cur.macroName() != "\\"
 757                     && cur.macroModeClose()) {
 758                         MathAtom const atom = cur.prevAtom();
 759                         if (atom->asNestInset() && atom->nargs() > 0) {
 760                                 cur.posLeft();
 761                                 cur.pushLeft(*cur.nextInset());
 762                         }
 763                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 764                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 765                         cur.undispatched();
 766                 }
 767                 break;
 768
 769         //case LFUN_SERVER_GET_XY:
 770         //      sprintf(dispatch_buffer, "%d %d",);
 771         //      break;
 772
 773         case LFUN_SERVER_SET_XY: {
 774                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 775                 int x = 0;
 776                 int y = 0;
 777                 istringstream is(to_utf8(cmd.argument()));
 778                 is >> x >> y;
 779                 cur.setScreenPos(x, y);
 780                 break;
 781         }
 782
 783         // Special casing for superscript in case of LyX handling
 784         // dead-keys:
 785         case LFUN_ACCENT_CIRCUMFLEX:
 786                 if (cmd.argument().empty()) {
 787                         // do superscript if LyX handles
 788                         // deadkeys
 789                         recordUndo(cur, Undo::ATOMIC);
 790                         script(cur, true, grabAndEraseSelection(cur));
 791                 }
 792                 break;
 793
 794         case LFUN_ACCENT_UMLAUT:
 795         case LFUN_ACCENT_ACUTE:
 796         case LFUN_ACCENT_GRAVE:
 797         case LFUN_ACCENT_BREVE:
 798         case LFUN_ACCENT_DOT:
 799         case LFUN_ACCENT_MACRON:
 800         case LFUN_ACCENT_CARON:
 801         case LFUN_ACCENT_TILDE:
 802         case LFUN_ACCENT_CEDILLA:
 803         case LFUN_ACCENT_CIRCLE:
 804         case LFUN_ACCENT_UNDERDOT:
 805         case LFUN_ACCENT_TIE:
 806         case LFUN_ACCENT_OGONEK:
 807         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 808                 break;
 809
 810         //  Math fonts
 811         case LFUN_FONT_FREE_APPLY:
 812         case LFUN_FONT_FREE_UPDATE:
 813                 handleFont2(cur, cmd.argument());
 814                 break;
 815
 816         case LFUN_FONT_BOLD:
 817                 if (currentMode() == TEXT_MODE)
 818                         handleFont(cur, cmd.argument(), "textbf");
 819                 else
 820                         handleFont(cur, cmd.argument(), "mathbf");
 821                 break;
 822         case LFUN_FONT_SANS:
 823                 if (currentMode() == TEXT_MODE)
 824                         handleFont(cur, cmd.argument(), "textsf");
 825                 else
 826                         handleFont(cur, cmd.argument(), "mathsf");
 827                 break;
 828         case LFUN_FONT_EMPH:
 829                 if (currentMode() == TEXT_MODE)
 830                         handleFont(cur, cmd.argument(), "emph");
 831                 else
 832                         handleFont(cur, cmd.argument(), "mathcal");
 833                 break;
 834         case LFUN_FONT_ROMAN:
 835                 if (currentMode() == TEXT_MODE)
 836                         handleFont(cur, cmd.argument(), "textrm");
 837                 else
 838                         handleFont(cur, cmd.argument(), "mathrm");
 839                 break;
 840         case LFUN_FONT_CODE:
 841                 if (currentMode() == TEXT_MODE)
 842                         handleFont(cur, cmd.argument(), "texttt");
 843                 else
 844                         handleFont(cur, cmd.argument(), "mathtt");
 845                 break;
 846         case LFUN_FONT_FRAK:
 847                 handleFont(cur, cmd.argument(), "mathfrak");
 848                 break;
 849         case LFUN_FONT_ITAL:
 850                 if (currentMode() == TEXT_MODE)
 851                         handleFont(cur, cmd.argument(), "textit");
 852                 else
 853                         handleFont(cur, cmd.argument(), "mathit");
 854                 break;
 855         case LFUN_FONT_NOUN:
 856                 if (currentMode() == TEXT_MODE)
 857                         // FIXME: should be "noun"
 858                         handleFont(cur, cmd.argument(), "textsc");
 859                 else
 860                         handleFont(cur, cmd.argument(), "mathbb");
 861                 break;
 862         //case LFUN_FONT_FREE_APPLY:
 863                 handleFont(cur, cmd.argument(), "textrm");
 864                 break;
 865         case LFUN_FONT_DEFAULT:
 866                 handleFont(cur, cmd.argument(), "textnormal");
 867                 break;
 868
 869         case LFUN_MATH_MODE: {
 870 #if 1
 871                 // ignore math-mode on when already in math mode
 872                 if (currentMode() == InsetBase::MATH_MODE && cmd.argument() == "on")
 873                         break;
 874                 cur.macroModeClose();
 875                 docstring const save_selection = grabAndEraseSelection(cur);
 876                 selClearOrDel(cur);
 877                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 878                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 879                 cur.posLeft();
 880                 cur.pushLeft(*cur.nextInset());
 881                 cur.niceInsert(save_selection);
 882 #else
 883                 if (currentMode() == InsetBase::TEXT_MODE) {
 884                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 885                         cur.message(_("create new math text environment ($...$)"));
 886                 } else {
 887                         handleFont(cur, cmd.argument(), "textrm");
 888                         cur.message(_("entered math text mode (textrm)"));
 889                 }
 890 #endif
 891                 break;
 892         }
 893
 894         case LFUN_MATH_SIZE:
 895 #if 0
 896                 recordUndo(cur);
 897                 cur.setSize(arg);
 898 #endif
 899                 break;
 900
 901         case LFUN_MATH_MATRIX: {
 902                 recordUndo(cur, Undo::ATOMIC);
 903                 unsigned int m = 1;
 904                 unsigned int n = 1;
 905                 docstring v_align;
 906                 docstring h_align;
 907                 idocstringstream is(cmd.argument());
 908                 is >> m >> n >> v_align >> h_align;
 909                 if (m < 1)
 910                         m = 1;
 911                 if (n < 1)
 912                         n = 1;
 913                 v_align += 'c';
 914                 cur.niceInsert(
 915                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 916                 break;
 917         }
 918
 919         case LFUN_MATH_DELIM: {
 920                 docstring ls;
 921                 docstring rs = support::split(cmd.argument(), ls, ' ');
 922                 // Reasonable default values
 923                 if (ls.empty())
 924                         ls = '(';
 925                 if (rs.empty())
 926                         rs = ')';
 927                 recordUndo(cur, Undo::ATOMIC);
 928                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 929                 break;
 930         }
 931
 932         case LFUN_MATH_BIGDELIM: {
 933                 docstring const lname  = from_utf8(cmd.getArg(0));
 934                 docstring const ldelim = from_utf8(cmd.getArg(1));
 935                 docstring const rname  = from_utf8(cmd.getArg(2));
 936                 docstring const rdelim = from_utf8(cmd.getArg(3));
 937                 latexkeys const * l = in_word_set(lname);
 938                 bool const have_l = l && l->inset == "big" &&
 939                                     InsetMathBig::isBigInsetDelim(ldelim);
 940                 l = in_word_set(rname);
 941                 bool const have_r = l && l->inset == "big" &&
 942                                     InsetMathBig::isBigInsetDelim(rdelim);
 943                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 944                 // or right delimiter.
 945                 if (have_l || have_r) {
 946                         recordUndo(cur, Undo::ATOMIC);
 947                         docstring const selection = grabAndEraseSelection(cur);
 948                         selClearOrDel(cur);
 949                         if (have_l)
 950                                 cur.insert(MathAtom(new InsetMathBig(lname,
 951                                                                 ldelim)));
 952                         cur.niceInsert(selection);
 953                         if (have_r)
 954                                 cur.insert(MathAtom(new InsetMathBig(rname,
 955                                                                 rdelim)));
 956                 }
 957                 // Don't call cur.undispatched() if we did nothing, this would
 958                 // lead to infinite recursion via LyXText::dispatch().
 959                 break;
 960         }
 961
 962         case LFUN_SPACE_INSERT:
 963         case LFUN_MATH_SPACE:
 964                 recordUndo(cur, Undo::ATOMIC);
 965                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 966                 break;
 967
 968         case LFUN_ERT_INSERT:
 969                 // interpret this as if a backslash was typed
 970                 recordUndo(cur, Undo::ATOMIC);
 971                 interpretChar(cur, '\\');
 972                 break;
 973
 974         case LFUN_MATH_SUBSCRIPT:
 975                 // interpret this as if a _ was typed
 976                 recordUndo(cur, Undo::ATOMIC);
 977                 interpretChar(cur, '_');
 978                 break;
 979
 980         case LFUN_MATH_SUPERSCRIPT:
 981                 // interpret this as if a ^ was typed
 982                 recordUndo(cur, Undo::ATOMIC);
 983                 interpretChar(cur, '^');
 984                 break;
 985
 986 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 987 // handling such that "self-insert" works on "arbitrary stuff" too, and
 988 // math-insert only handles special math things like "matrix".
 989         case LFUN_MATH_INSERT: {
 990                 recordUndo(cur, Undo::ATOMIC);
 991                 if (cmd.argument() == "^" || cmd.argument() == "_") {
 992                         interpretChar(cur, cmd.argument()[0]);
 993                 } else
 994                         cur.niceInsert(cmd.argument());
 995                 break;
 996                 }
 997
 998         case LFUN_DIALOG_SHOW_NEW_INSET: {
 999                 docstring const & name = cmd.argument();
1000                 string data;
1001                 if (name == "ref") {
1002                         RefInset tmp(name);
1003                         data = tmp.createDialogStr(to_utf8(name));
1004                 }
1005                 cur.bv().showInsetDialog(to_utf8(name), data, 0);
1006                 break;
1007         }
1008
1009         case LFUN_INSET_INSERT: {
1010                 MathArray ar;
1011                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
1012                         recordUndo(cur);
1013                         cur.insert(ar);
1014                 } else
1015                         cur.undispatched();
1016                 break;
1017         }
1018
1019         default:
1020                 InsetMathDim::doDispatch(cur, cmd);
1021                 break;
1022         }
1023 }
1024
1025
1026 bool InsetMathNest::getStatus(LCursor & cur, FuncRequest const & cmd,
1027                 FuncStatus & flag) const
1028 {
1029         // the font related toggles
1030         //string tc = "mathnormal";
1031         bool ret = true;
1032         string const arg = to_utf8(cmd.argument());
1033         switch (cmd.action) {
1034         case LFUN_TABULAR_FEATURE:
1035                 flag.enabled(false);
1036                 break;
1037 #if 0
1038         case LFUN_TABULAR_FEATURE:
1039                 // FIXME: check temporarily disabled
1040                 // valign code
1041                 char align = mathcursor::valign();
1042                 if (align == '\0') {
1043                         enable = false;
1044                         break;
1045                 }
1046                 if (cmd.argument().empty()) {
1047                         flag.clear();
1048                         break;
1049                 }
1050                 if (!contains("tcb", cmd.argument()[0])) {
1051                         enable = false;
1052                         break;
1053                 }
1054                 flag.setOnOff(cmd.argument()[0] == align);
1055                 break;
1056 #endif
1057         /// We have to handle them since 1.4 blocks all unhandled actions
1058         case LFUN_FONT_ITAL:
1059         case LFUN_FONT_BOLD:
1060         case LFUN_FONT_SANS:
1061         case LFUN_FONT_EMPH:
1062         case LFUN_FONT_CODE:
1063         case LFUN_FONT_NOUN:
1064         case LFUN_FONT_ROMAN:
1065         case LFUN_FONT_DEFAULT:
1066                 flag.enabled(true);
1067                 break;
1068         case LFUN_MATH_MUTATE:
1069                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1070                 flag.setOnOff(false);
1071                 break;
1072
1073         // we just need to be in math mode to enable that
1074         case LFUN_MATH_SIZE:
1075         case LFUN_MATH_SPACE:
1076         case LFUN_MATH_LIMITS:
1077         case LFUN_MATH_NONUMBER:
1078         case LFUN_MATH_NUMBER:
1079         case LFUN_MATH_EXTERN:
1080                 flag.enabled(true);
1081                 break;
1082
1083         case LFUN_FONT_FRAK:
1084                 flag.enabled(currentMode() != TEXT_MODE);
1085                 break;
1086
1087         case LFUN_MATH_INSERT: {
1088                 bool const textarg =
1089                         arg == "\\textbf"   || arg == "\\textsf" ||
1090                         arg == "\\textrm"   || arg == "\\textmd" ||
1091                         arg == "\\textit"   || arg == "\\textsc" ||
1092                         arg == "\\textsl"   || arg == "\\textup" ||
1093                         arg == "\\texttt"   || arg == "\\textbb" ||
1094                         arg == "\\textnormal";
1095                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1096                 break;
1097         }
1098
1099         case LFUN_MATH_MATRIX:
1100                 flag.enabled(currentMode() == MATH_MODE);
1101                 break;
1102
1103         case LFUN_INSET_INSERT: {
1104                 // Don't test createMathInset_fromDialogStr(), since
1105                 // getStatus is not called with a valid reference and the
1106                 // dialog would not be applyable.
1107                 string const name = cmd.getArg(0);
1108                 flag.enabled(name == "ref");
1109                 break;
1110         }
1111
1112         case LFUN_MATH_DELIM:
1113         case LFUN_MATH_BIGDELIM:
1114                 // Don't do this with multi-cell selections
1115                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1116                 break;
1117
1118         default:
1119                 ret = false;
1120                 break;
1121         }
1122         return ret;
1123 }
1124
1125
1126 void InsetMathNest::edit(LCursor & cur, bool left)
1127 {
1128         cur.push(*this);
1129         cur.idx() = left ? 0 : cur.lastidx();
1130         cur.pos() = left ? 0 : cur.lastpos();
1131         cur.resetAnchor();
1132         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1133 }
1134
1135
1136 InsetBase * InsetMathNest::editXY(LCursor & cur, int x, int y)
1137 {
1138         int idx_min = 0;
1139         int dist_min = 1000000;
1140         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1141                 int const d = cell(i).dist(cur.bv(), x, y);
1142                 if (d < dist_min) {
1143                         dist_min = d;
1144                         idx_min = i;
1145                 }
1146         }
1147         MathArray & ar = cell(idx_min);
1148         cur.push(*this);
1149         cur.idx() = idx_min;
1150         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1151
1152         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1153         if (dist_min == 0) {
1154                 // hit inside cell
1155                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1156                         if (ar[i]->covers(cur.bv(), x, y))
1157                                 return ar[i].nucleus()->editXY(cur, x, y);
1158         }
1159         return this;
1160 }
1161
1162
1163 void InsetMathNest::lfunMousePress(LCursor & cur, FuncRequest & cmd)
1164 {
1165         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1166         BufferView & bv = cur.bv();
1167         if (cmd.button() == mouse_button::button1) {
1168                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1169                 bv.mouseSetCursor(cur);
1170                 // FIXME: we have to enable full redraw here because of the
1171                 // visual box corners that define the inset.
1172                 //cur.noUpdate();
1173         } else if (cmd.button() == mouse_button::button2) {
1174                 MathArray ar;
1175                 if (cur.selection())
1176                         asArray(bv.cursor().selectionAsString(false), ar);
1177                 else
1178                         asArray(theSelection().get(), ar);
1179
1180                 cur.insert(ar);
1181                 bv.mouseSetCursor(cur);
1182         }
1183 }
1184
1185
1186 void InsetMathNest::lfunMouseMotion(LCursor & cur, FuncRequest & cmd)
1187 {
1188         // only select with button 1
1189         if (cmd.button() == mouse_button::button1) {
1190                 LCursor & bvcur = cur.bv().cursor();
1191                 if (bvcur.anchor_.hasPart(cur)) {
1192                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1193                         bvcur.setCursor(cur);
1194                         bvcur.selection() = true;
1195                         //lyxerr << "MOTION " << bvcur << endl;
1196                 }
1197                 else {
1198                         cur.undispatched();
1199                 }
1200         }
1201 }
1202
1203
1204 void InsetMathNest::lfunMouseRelease(LCursor & cur, FuncRequest & cmd)
1205 {
1206         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1207
1208         if (cmd.button() == mouse_button::button1) {
1209                 //theSelection().put(cur.grabSelection());
1210                 if (!cur.selection())
1211                         cur.noUpdate();
1212                 return;
1213         }
1214
1215         if (cmd.button() == mouse_button::button3) {
1216                 // try to dispatch to enclosed insets first
1217                 cur.bv().showDialog("mathpanel");
1218                 return;
1219         }
1220
1221         cur.undispatched();
1222 }
1223
1224
1225 bool InsetMathNest::interpretChar(LCursor & cur, char_type c)
1226 {
1227         //lyxerr << "interpret 2: '" << c << "'" << endl;
1228         docstring save_selection;
1229         if (c == '^' || c == '_')
1230                 save_selection = grabAndEraseSelection(cur);
1231
1232         cur.clearTargetX();
1233
1234         // handle macroMode
1235         if (cur.inMacroMode()) {
1236                 docstring name = cur.macroName();
1237
1238                 /// are we currently typing '#1' or '#2' or...?
1239                 if (name == "\\#") {
1240                         cur.backspace();
1241                         int n = c - '0';
1242                         if (n >= 1 && n <= 9)
1243                                 cur.insert(new MathMacroArgument(n));
1244                         return true;
1245                 }
1246
1247                 if (isalpha(c)) {
1248                         cur.activeMacro()->setName(name + docstring(1, c));
1249                         return true;
1250                 }
1251
1252                 // handle 'special char' macros
1253                 if (name == "\\") {
1254                         // remove the '\\'
1255                         if (c == '\\') {
1256                                 cur.backspace();
1257                                 if (currentMode() == InsetMath::TEXT_MODE)
1258                                         cur.niceInsert(createInsetMath("textbackslash"));
1259                                 else
1260                                         cur.niceInsert(createInsetMath("backslash"));
1261                         } else if (c == '{') {
1262                                 cur.backspace();
1263                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1264                         } else if (c == '%') {
1265                                 cur.backspace();
1266                                 cur.niceInsert(MathAtom(new InsetMathComment));
1267                         } else if (c == '#') {
1268                                 BOOST_ASSERT(cur.activeMacro());
1269                                 cur.activeMacro()->setName(name + docstring(1, c));
1270                         } else {
1271                                 cur.backspace();
1272                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1273                         }
1274                         return true;
1275                 }
1276
1277                 // One character big delimiters. The others are handled in
1278                 // interpretString().
1279                 latexkeys const * l = in_word_set(name.substr(1));
1280                 if (name[0] == '\\' && l && l->inset == "big") {
1281                         docstring delim;
1282                         switch (c) {
1283                         case '{':
1284                                 delim = from_ascii("\\{");
1285                                 break;
1286                         case '}':
1287                                 delim = from_ascii("\\}");
1288                                 break;
1289                         default:
1290                                 delim = docstring(1, c);
1291                                 break;
1292                         }
1293                         if (InsetMathBig::isBigInsetDelim(delim)) {
1294                                 // name + delim ared a valid InsetMathBig.
1295                                 // We can't use cur.macroModeClose() because
1296                                 // it does not handle delim.
1297                                 InsetMathUnknown * p = cur.activeMacro();
1298                                 p->finalize();
1299                                 --cur.pos();
1300                                 cur.cell().erase(cur.pos());
1301                                 cur.plainInsert(MathAtom(
1302                                         new InsetMathBig(name.substr(1), delim)));
1303                                 return true;
1304                         }
1305                 }
1306
1307                 // leave macro mode and try again if necessary
1308                 cur.macroModeClose();
1309                 if (c == '{')
1310                         cur.niceInsert(MathAtom(new InsetMathBrace));
1311                 else if (c != ' ')
1312                         interpretChar(cur, c);
1313                 return true;
1314         }
1315
1316         // This is annoying as one has to press <space> far too often.
1317         // Disable it.
1318
1319 #if 0
1320                 // leave autocorrect mode if necessary
1321                 if (autocorrect() && c == ' ') {
1322                         autocorrect() = false;
1323                         return true;
1324                 }
1325 #endif
1326
1327         // just clear selection on pressing the space bar
1328         if (cur.selection() && c == ' ') {
1329                 cur.selection() = false;
1330                 return true;
1331         }
1332
1333         selClearOrDel(cur);
1334
1335         if (c == '\\') {
1336                 //lyxerr << "starting with macro" << endl;
1337                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1338                 return true;
1339         }
1340
1341         if (c == '\n') {
1342                 if (currentMode() == InsetMath::TEXT_MODE)
1343                         cur.insert(c);
1344                 return true;
1345         }
1346
1347         if (c == ' ') {
1348                 if (currentMode() == InsetMath::TEXT_MODE) {
1349                         // insert spaces in text mode,
1350                         // but suppress direct insertion of two spaces in a row
1351                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1352                         // it is better than nothing...
1353                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ') {
1354                                 cur.insert(c);
1355                                 // FIXME: we have to enable full redraw here because of the
1356                                 // visual box corners that define the inset. If we know for
1357                                 // sure that we stay within the same cell we can optimize for
1358                                 // that using:
1359                                 //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1360                         }
1361                         return true;
1362                 }
1363                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1364                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1365                         // FIXME: we have to enable full redraw here because of the
1366                         // visual box corners that define the inset. If we know for
1367                         // sure that we stay within the same cell we can optimize for
1368                         // that using:
1369                         //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1370                         return true;
1371                 }
1372
1373                 if (cur.popRight()) {
1374                         // FIXME: we have to enable full redraw here because of the
1375                         // visual box corners that define the inset. If we know for
1376                         // sure that we stay within the same cell we can optimize for
1377                         // that using:
1378                         //cur.updateFlags(Update::FitCursor);
1379                         return true;
1380                 }
1381
1382                 // if we are at the very end, leave the formula
1383                 return cur.pos() != cur.lastpos();
1384         }
1385
1386         // These shouldn't work in text mode:
1387         if (currentMode() != InsetMath::TEXT_MODE) {
1388                 if (c == '_') {
1389                         script(cur, false, save_selection);
1390                         return true;
1391                 }
1392                 if (c == '^') {
1393                         script(cur, true, save_selection);
1394                         return true;
1395                 }
1396                 if (c == '~') {
1397                         cur.niceInsert(createInsetMath("sim"));
1398                         return true;
1399                 }
1400         }
1401
1402         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1403             c == '%' || c == '_' || c == '^') {
1404                 cur.niceInsert(createInsetMath(docstring(1, c)));
1405                 return true;
1406         }
1407
1408
1409         // try auto-correction
1410         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1411         //      return true;
1412
1413         // no special circumstances, so insert the character without any fuss
1414         cur.insert(c);
1415         cur.autocorrect() = true;
1416         return true;
1417 }
1418
1419
1420 bool InsetMathNest::interpretString(LCursor & cur, docstring const & str)
1421 {
1422         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1423         // possible
1424         if (!cur.empty() && cur.pos() > 0 &&
1425             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1426                 if (InsetMathBig::isBigInsetDelim(str)) {
1427                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1428                         if (prev[0] == '\\') {
1429                                 prev = prev.substr(1);
1430                                 latexkeys const * l = in_word_set(prev);
1431                                 if (l && l->inset == "big") {
1432                                         cur.cell()[cur.pos() - 1] =
1433                                                 MathAtom(new InsetMathBig(prev, str));
1434                                         return true;
1435                                 }
1436                         }
1437                 }
1438         }
1439         return false;
1440 }
1441
1442
1443 bool InsetMathNest::script(LCursor & cur, bool up,
1444                 docstring const & save_selection)
1445 {
1446         // Hack to get \^ and \_ working
1447         //lyxerr << "handling script: up: " << up << endl;
1448         if (cur.inMacroMode() && cur.macroName() == "\\") {
1449                 if (up)
1450                         cur.niceInsert(createInsetMath("mathcircumflex"));
1451                 else
1452                         interpretChar(cur, '_');
1453                 return true;
1454         }
1455
1456         cur.macroModeClose();
1457         if (asScriptInset() && cur.idx() == 0) {
1458                 // we are in a nucleus of a script inset, move to _our_ script
1459                 InsetMathScript * inset = asScriptInset();
1460                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1461                 inset->ensure(up);
1462                 cur.idx() = inset->idxOfScript(up);
1463                 cur.pos() = 0;
1464         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1465                 --cur.pos();
1466                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1467                 cur.push(*inset);
1468                 inset->ensure(up);
1469                 cur.idx() = inset->idxOfScript(up);
1470                 cur.pos() = cur.lastpos();
1471         } else {
1472                 // convert the thing to our left to a scriptinset or create a new
1473                 // one if in the very first position of the array
1474                 if (cur.pos() == 0) {
1475                         //lyxerr << "new scriptinset" << endl;
1476                         cur.insert(new InsetMathScript(up));
1477                 } else {
1478                         //lyxerr << "converting prev atom " << endl;
1479                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1480                 }
1481                 --cur.pos();
1482                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1483                 // See comment in MathParser.C for special handling of {}-bases
1484
1485                 cur.push(*inset);
1486                 cur.idx() = 1;
1487                 cur.pos() = 0;
1488         }
1489         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1490         cur.niceInsert(save_selection);
1491         cur.resetAnchor();
1492         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1493         return true;
1494 }
1495
1496
1497 } // namespace lyx