src/mathed/InsetMathNest.cpp

   1 /**
   2  * \file InsetMathNest.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author André Pönitz
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "InsetMathNest.h"
  14
  15 #include "InsetMathArray.h"
  16 #include "InsetMathBig.h"
  17 #include "InsetMathBox.h"
  18 #include "InsetMathBrace.h"
  19 #include "InsetMathColor.h"
  20 #include "InsetMathComment.h"
  21 #include "InsetMathDelim.h"
  22 #include "InsetMathHull.h"
  23 //#include "InsetMathMBox.h"
  24 #include "InsetMathRef.h"
  25 #include "InsetMathScript.h"
  26 #include "InsetMathSpace.h"
  27 #include "InsetMathSymbol.h"
  28 #include "InsetMathUnknown.h"
  29 #include "MathData.h"
  30 #include "MathFactory.h"
  31 #include "MathMacroArgument.h"
  32 #include "MathParser.h"
  33 #include "MathStream.h"
  34 #include "MathSupport.h"
  35
  36 #include "bufferview_funcs.h"
  37 #include "BufferView.h"
  38 #include "Color.h"
  39 #include "CoordCache.h"
  40 #include "Cursor.h"
  41 #include "CutAndPaste.h"
  42 #include "debug.h"
  43 #include "DispatchResult.h"
  44 #include "FuncRequest.h"
  45 #include "FuncStatus.h"
  46 #include "gettext.h"
  47 #include "Text.h"
  48 #include "OutputParams.h"
  49 #include "Undo.h"
  50
  51 #include "support/lstrings.h"
  52 #include "support/textutils.h"
  53
  54 #include "frontends/Clipboard.h"
  55 #include "frontends/Painter.h"
  56 #include "frontends/Selection.h"
  57
  58 #include "FuncRequest.h"
  59
  60 #include <sstream>
  61
  62
  63 namespace lyx {
  64
  65 using cap::copySelection;
  66 using cap::grabAndEraseSelection;
  67 using cap::cutSelection;
  68 using cap::replaceSelection;
  69 using cap::selClearOrDel;
  70
  71 using std::endl;
  72 using std::string;
  73 using std::istringstream;
  74
  75
  76 InsetMathNest::InsetMathNest(idx_type nargs)
  77         : cells_(nargs), lock_(false)
  78 {}
  79
  80
  81 InsetMathNest::InsetMathNest(InsetMathNest const & inset)
  82         : InsetMath(inset), cells_(inset.cells_), lock_(inset.lock_)
  83 {}
  84
  85
  86 InsetMathNest & InsetMathNest::operator=(InsetMathNest const & inset)
  87 {
  88         cells_ = inset.cells_;
  89         lock_ = inset.lock_;
  90         InsetMath::operator=(inset);
  91         return *this;
  92 }
  93
  94
  95 InsetMath::idx_type InsetMathNest::nargs() const
  96 {
  97         return cells_.size();
  98 }
  99
 100
 101 void InsetMathNest::cursorPos(BufferView const & bv,
 102                 CursorSlice const & sl, bool /*boundary*/,
 103                 int & x, int & y) const
 104 {
 105 // FIXME: This is a hack. Ideally, the coord cache should not store
 106 // absolute positions, but relative ones. This would mean to call
 107 // setXY() not in MathData::draw(), but in the parent insets' draw()
 108 // with the correctly adjusted x,y values. But this means that we'd have
 109 // to touch all (math)inset's draw() methods. Right now, we'll store
 110 // absolute value, and make them here relative, only to make them
 111 // absolute again when actually drawing the cursor. What a mess.
 112         BOOST_ASSERT(ptr_cmp(&sl.inset(), this));
 113         MathData const & ar = sl.cell();
 114         CoordCache const & coord_cache = bv.coordCache();
 115         if (!coord_cache.getArrays().has(&ar)) {
 116                 // this can (semi-)legally happen if we just created this cell
 117                 // and it never has been drawn before. So don't ASSERT.
 118                 //lyxerr << "no cached data for array " << &ar << endl;
 119                 x = 0;
 120                 y = 0;
 121                 return;
 122         }
 123         Point const pt = coord_cache.getArrays().xy(&ar);
 124         if (!coord_cache.getInsets().has(this)) {
 125                 // same as above
 126                 //lyxerr << "no cached data for inset " << this << endl;
 127                 x = 0;
 128                 y = 0;
 129                 return;
 130         }
 131         Point const pt2 = coord_cache.getInsets().xy(this);
 132         //lyxerr << "retrieving position cache for MathData "
 133         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 134         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 135         y = pt.y_ - pt2.y_;
 136 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 137 //              << " asc: " << ascent() << "  des: " << descent()
 138 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 139         // move cursor visually into empty cells ("blue rectangles");
 140         if (ar.empty())
 141                 x += 2;
 142 }
 143
 144
 145 void InsetMathNest::metrics(MetricsInfo const & mi) const
 146 {
 147         MetricsInfo m = mi;
 148         for (idx_type i = 0, n = nargs(); i != n; ++i)
 149                 cell(i).metrics(m);
 150 }
 151
 152
 153 bool InsetMathNest::idxNext(Cursor & cur) const
 154 {
 155         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 156         if (cur.idx() == cur.lastidx())
 157                 return false;
 158         ++cur.idx();
 159         cur.pos() = 0;
 160         return true;
 161 }
 162
 163
 164 bool InsetMathNest::idxRight(Cursor & cur) const
 165 {
 166         return idxNext(cur);
 167 }
 168
 169
 170 bool InsetMathNest::idxPrev(Cursor & cur) const
 171 {
 172         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 173         if (cur.idx() == 0)
 174                 return false;
 175         --cur.idx();
 176         cur.pos() = cur.lastpos();
 177         return true;
 178 }
 179
 180
 181 bool InsetMathNest::idxLeft(Cursor & cur) const
 182 {
 183         return idxPrev(cur);
 184 }
 185
 186
 187 bool InsetMathNest::idxFirst(Cursor & cur) const
 188 {
 189         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 190         if (nargs() == 0)
 191                 return false;
 192         cur.idx() = 0;
 193         cur.pos() = 0;
 194         return true;
 195 }
 196
 197
 198 bool InsetMathNest::idxLast(Cursor & cur) const
 199 {
 200         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 201         if (nargs() == 0)
 202                 return false;
 203         cur.idx() = cur.lastidx();
 204         cur.pos() = cur.lastpos();
 205         return true;
 206 }
 207
 208
 209 void InsetMathNest::dump() const
 210 {
 211         odocstringstream oss;
 212         WriteStream os(oss);
 213         os << "---------------------------------------------\n";
 214         write(os);
 215         os << "\n";
 216         for (idx_type i = 0, n = nargs(); i != n; ++i)
 217                 os << cell(i) << "\n";
 218         os << "---------------------------------------------\n";
 219         lyxerr << to_utf8(oss.str());
 220 }
 221
 222
 223 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 224 {
 225 #if 0
 226         if (lock_)
 227                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 228                                         Color::mathlockbg);
 229 #endif
 230         setPosCache(pi, x, y);
 231 }
 232
 233
 234 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 235 {
 236         BufferView & bv = *pi.base.bv;
 237         // this should use the x/y values given, not the cached values
 238         Cursor & cur = bv.cursor();
 239         if (!cur.selection())
 240                 return;
 241         if (!ptr_cmp(&cur.inset(), this))
 242                 return;
 243
 244         // FIXME: hack to get position cache warm
 245         pi.pain.setDrawingEnabled(false);
 246         draw(pi, x, y);
 247         pi.pain.setDrawingEnabled(true);
 248
 249         CursorSlice s1 = cur.selBegin();
 250         CursorSlice s2 = cur.selEnd();
 251
 252         //lyxerr << "InsetMathNest::drawing selection: "
 253         //      << " s1: " << s1 << " s2: " << s2 << endl;
 254         if (s1.idx() == s2.idx()) {
 255                 MathData const & c = cell(s1.idx());
 256                 int x1 = c.xo(bv) + c.pos2x(s1.pos());
 257                 int y1 = c.yo(bv) - c.ascent();
 258                 int x2 = c.xo(bv) + c.pos2x(s2.pos());
 259                 int y2 = c.yo(bv) + c.descent();
 260                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color::selection);
 261         //lyxerr << "InsetMathNest::drawing selection 3: "
 262         //      << " x1: " << x1 << " x2: " << x2
 263         //      << " y1: " << y1 << " y2: " << y2 << endl;
 264         } else {
 265                 for (idx_type i = 0; i < nargs(); ++i) {
 266                         if (idxBetween(i, s1.idx(), s2.idx())) {
 267                                 MathData const & c = cell(i);
 268                                 int x1 = c.xo(bv);
 269                                 int y1 = c.yo(bv) - c.ascent();
 270                                 int x2 = c.xo(bv) + c.width();
 271                                 int y2 = c.yo(bv) + c.descent();
 272                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color::selection);
 273                         }
 274                 }
 275         }
 276 }
 277
 278
 279 void InsetMathNest::validate(LaTeXFeatures & features) const
 280 {
 281         for (idx_type i = 0; i < nargs(); ++i)
 282                 cell(i).validate(features);
 283 }
 284
 285
 286 void InsetMathNest::replace(ReplaceData & rep)
 287 {
 288         for (idx_type i = 0; i < nargs(); ++i)
 289                 cell(i).replace(rep);
 290 }
 291
 292
 293 bool InsetMathNest::contains(MathData const & ar) const
 294 {
 295         for (idx_type i = 0; i < nargs(); ++i)
 296                 if (cell(i).contains(ar))
 297                         return true;
 298         return false;
 299 }
 300
 301
 302 bool InsetMathNest::lock() const
 303 {
 304         return lock_;
 305 }
 306
 307
 308 void InsetMathNest::lock(bool l)
 309 {
 310         lock_ = l;
 311 }
 312
 313
 314 bool InsetMathNest::isActive() const
 315 {
 316         return nargs() > 0;
 317 }
 318
 319
 320 MathData InsetMathNest::glue() const
 321 {
 322         MathData ar;
 323         for (size_t i = 0; i < nargs(); ++i)
 324                 ar.append(cell(i));
 325         return ar;
 326 }
 327
 328
 329 void InsetMathNest::write(WriteStream & os) const
 330 {
 331         os << '\\' << name().c_str();
 332         for (size_t i = 0; i < nargs(); ++i)
 333                 os << '{' << cell(i) << '}';
 334         if (nargs() == 0)
 335                 os.pendingSpace(true);
 336         if (lock_ && !os.latex()) {
 337                 os << "\\lyxlock";
 338                 os.pendingSpace(true);
 339         }
 340 }
 341
 342
 343 void InsetMathNest::normalize(NormalStream & os) const
 344 {
 345         os << '[' << name().c_str();
 346         for (size_t i = 0; i < nargs(); ++i)
 347                 os << ' ' << cell(i);
 348         os << ']';
 349 }
 350
 351
 352 int InsetMathNest::latex(Buffer const &, odocstream & os,
 353                         OutputParams const & runparams) const
 354 {
 355         WriteStream wi(os, runparams.moving_arg, true);
 356         write(wi);
 357         return wi.line();
 358 }
 359
 360
 361 bool InsetMathNest::notifyCursorLeaves(Cursor & /*cur*/)
 362 {
 363 #ifdef WITH_WARNINGS
 364 #warning look here
 365 #endif
 366 #if 0
 367         MathData & ar = cur.cell();
 368         // remove base-only "scripts"
 369         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 370                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 371                 if (p && p->nargs() == 1) {
 372                         MathData ar = p->nuc();
 373                         erase(i);
 374                         insert(i, ar);
 375                         cur.adjust(i, ar.size() - 1);
 376                 }
 377         }
 378
 379         // glue adjacent font insets of the same kind
 380         for (pos_type i = 0; i + 1 < size(); ++i) {
 381                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 382                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 383                 if (p && q && p->name() == q->name()) {
 384                         p->cell(0).append(q->cell(0));
 385                         erase(i + 1);
 386                         cur.adjust(i, -1);
 387                 }
 388         }
 389 #endif
 390         return false;
 391 }
 392
 393
 394 void InsetMathNest::handleFont
 395         (Cursor & cur, docstring const & arg, char const * const font)
 396 {
 397         handleFont(cur, arg, from_ascii(font));
 398 }
 399
 400
 401 void InsetMathNest::handleFont
 402         (Cursor & cur, docstring const & arg, docstring const & font)
 403 {
 404         // this whole function is a hack and won't work for incremental font
 405         // changes...
 406
 407         if (cur.inset().asInsetMath()->name() == font) {
 408                 recordUndoInset(cur, Undo::ATOMIC);
 409                 cur.handleFont(to_utf8(font));
 410         } else {
 411                 recordUndo(cur, Undo::ATOMIC);
 412                 cur.handleNest(createInsetMath(font));
 413                 cur.insert(arg);
 414         }
 415 }
 416
 417
 418 void InsetMathNest::handleFont2(Cursor & cur, docstring const & arg)
 419 {
 420         recordUndo(cur, Undo::ATOMIC);
 421         Font font;
 422         bool b;
 423         bv_funcs::string2font(to_utf8(arg), font, b);
 424         if (font.color() != Color::inherit) {
 425                 MathAtom at = MathAtom(new InsetMathColor(true, font.color()));
 426                 cur.handleNest(at, 0);
 427         }
 428 }
 429
 430
 431 void InsetMathNest::doDispatch(Cursor & cur, FuncRequest & cmd)
 432 {
 433         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 434         //CursorSlice sl = cur.current();
 435
 436         switch (cmd.action) {
 437
 438         case LFUN_PASTE: {
 439                 recordUndo(cur);
 440                 cur.message(_("Paste"));
 441                 replaceSelection(cur);
 442                 docstring topaste;
 443                 if (cmd.argument().empty() && !theClipboard().isInternal())
 444                         topaste = theClipboard().getAsText();
 445                 else {
 446                         size_t n = 0;
 447                         idocstringstream is(cmd.argument());
 448                         is >> n;
 449                         topaste = cap::getSelection(cur.buffer(), n);
 450                 }
 451                 cur.niceInsert(topaste);
 452                 cur.clearSelection(); // bug 393
 453                 cur.bv().switchKeyMap();
 454                 finishUndo();
 455                 break;
 456         }
 457
 458         case LFUN_CUT:
 459                 recordUndo(cur);
 460                 cutSelection(cur, true, true);
 461                 cur.message(_("Cut"));
 462                 // Prevent stale position >= size crash
 463                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 464                 cur.normalize();
 465                 break;
 466
 467         case LFUN_COPY:
 468                 copySelection(cur);
 469                 cur.message(_("Copy"));
 470                 break;
 471
 472         case LFUN_MOUSE_PRESS:
 473                 lfunMousePress(cur, cmd);
 474                 break;
 475
 476         case LFUN_MOUSE_MOTION:
 477                 lfunMouseMotion(cur, cmd);
 478                 break;
 479
 480         case LFUN_MOUSE_RELEASE:
 481                 lfunMouseRelease(cur, cmd);
 482                 break;
 483
 484         case LFUN_FINISHED_LEFT:
 485                 cur.bv().cursor() = cur;
 486                 break;
 487
 488         case LFUN_FINISHED_RIGHT:
 489                 ++cur.pos();
 490                 cur.bv().cursor() = cur;
 491                 break;
 492
 493         case LFUN_CHAR_FORWARD:
 494                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 495         case LFUN_CHAR_FORWARD_SELECT:
 496                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 497                 cur.autocorrect() = false;
 498                 cur.clearTargetX();
 499                 cur.macroModeClose();
 500                 if (reverseDirectionNeeded(cur))
 501                         goto goto_char_backwards;
 502
 503 goto_char_forwards:
 504                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 505                         cur.pushLeft(*cur.nextAtom().nucleus());
 506                         cur.inset().idxFirst(cur);
 507                 } else if (cur.posRight() || idxRight(cur)
 508                         || cur.popRight() || cur.selection())
 509                         ;
 510                 else {
 511                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 512                         cur.undispatched();
 513                 }
 514                 break;
 515
 516         case LFUN_CHAR_BACKWARD:
 517                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 518         case LFUN_CHAR_BACKWARD_SELECT:
 519                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 520                 cur.autocorrect() = false;
 521                 cur.clearTargetX();
 522                 cur.macroModeClose();
 523                 if (reverseDirectionNeeded(cur))
 524                         goto goto_char_forwards;
 525
 526 goto_char_backwards:
 527                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 528                         cur.posLeft();
 529                         cur.push(*cur.nextAtom().nucleus());
 530                         cur.inset().idxLast(cur);
 531                 } else if (cur.posLeft() || idxLeft(cur)
 532                         || cur.popLeft() || cur.selection())
 533                         ;
 534                 else {
 535                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 536                         cur.undispatched();
 537                 }
 538                 break;
 539
 540         case LFUN_UP:
 541                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 542         case LFUN_UP_SELECT:
 543                 // FIXME Tried to use clearTargetX and macroModeClose, crashed on cur.up()
 544                 if (cur.inMacroMode()) {
 545                         // Make Helge happy
 546                         cur.macroModeClose();
 547                         break;
 548                 }
 549                 cur.selHandle(cmd.action == LFUN_UP_SELECT);
 550                 if (!cur.upDownInMath(true))
 551                         cur.undispatched();
 552                 // fixes bug 1598. Please check!
 553                 cur.normalize();
 554                 break;
 555
 556         case LFUN_DOWN:
 557                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 558         case LFUN_DOWN_SELECT:
 559                 if (cur.inMacroMode()) {
 560                         cur.macroModeClose();
 561                         break;
 562                 }
 563                 cur.selHandle(cmd.action == LFUN_DOWN_SELECT);
 564                 if (!cur.upDownInMath(false))
 565                         cur.undispatched();
 566                 // fixes bug 1598. Please check!
 567                 cur.normalize();
 568                 break;
 569
 570         case LFUN_MOUSE_DOUBLE:
 571         case LFUN_MOUSE_TRIPLE:
 572         case LFUN_WORD_SELECT:
 573                 cur.pos() = 0;
 574                 cur.idx() = 0;
 575                 cur.resetAnchor();
 576                 cur.selection() = true;
 577                 cur.pos() = cur.lastpos();
 578                 cur.idx() = cur.lastidx();
 579                 cap::saveSelection(cur);
 580                 break;
 581
 582         case LFUN_PARAGRAPH_UP:
 583         case LFUN_PARAGRAPH_DOWN:
 584                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 585         case LFUN_PARAGRAPH_UP_SELECT:
 586         case LFUN_PARAGRAPH_DOWN_SELECT:
 587                 break;
 588
 589         case LFUN_LINE_BEGIN:
 590         case LFUN_WORD_BACKWARD:
 591                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 592         case LFUN_LINE_BEGIN_SELECT:
 593         case LFUN_WORD_BACKWARD_SELECT:
 594                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 595                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 596                 cur.macroModeClose();
 597                 if (cur.pos() != 0) {
 598                         cur.pos() = 0;
 599                 } else if (cur.col() != 0) {
 600                         cur.idx() -= cur.col();
 601                         cur.pos() = 0;
 602                 } else if (cur.idx() != 0) {
 603                         cur.idx() = 0;
 604                         cur.pos() = 0;
 605                 } else {
 606                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 607                         cur.undispatched();
 608                 }
 609                 break;
 610
 611         case LFUN_WORD_FORWARD:
 612         case LFUN_LINE_END:
 613                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 614         case LFUN_WORD_FORWARD_SELECT:
 615         case LFUN_LINE_END_SELECT:
 616                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 617                                 cmd.action == LFUN_LINE_END_SELECT);
 618                 cur.macroModeClose();
 619                 cur.clearTargetX();
 620                 if (cur.pos() != cur.lastpos()) {
 621                         cur.pos() = cur.lastpos();
 622                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 623                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 624                         cur.pos() = cur.lastpos();
 625                 } else if (cur.idx() != cur.lastidx()) {
 626                         cur.idx() = cur.lastidx();
 627                         cur.pos() = cur.lastpos();
 628                 } else {
 629                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 630                         cur.undispatched();
 631                 }
 632                 break;
 633
 634         case LFUN_SCREEN_UP_SELECT:
 635         case LFUN_SCREEN_UP:
 636                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 637                 cur.undispatched();
 638                 break;
 639
 640         case LFUN_SCREEN_DOWN_SELECT:
 641         case LFUN_SCREEN_DOWN:
 642                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 643                 cur.undispatched();
 644                 break;
 645
 646         case LFUN_CELL_FORWARD:
 647                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 648                 cur.inset().idxNext(cur);
 649                 break;
 650
 651         case LFUN_CELL_BACKWARD:
 652                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 653                 cur.inset().idxPrev(cur);
 654                 break;
 655
 656         case LFUN_WORD_DELETE_BACKWARD:
 657         case LFUN_CHAR_DELETE_BACKWARD:
 658                 if (cur.pos() == 0)
 659                         // May affect external cell:
 660                         recordUndoInset(cur, Undo::ATOMIC);
 661                 else
 662                         recordUndo(cur, Undo::ATOMIC);
 663                 // if the inset can not be removed from within, delete it
 664                 if (!cur.backspace()) {
 665                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 666                         cur.innerText()->dispatch(cur, cmd);
 667                 }
 668                 break;
 669
 670         case LFUN_WORD_DELETE_FORWARD:
 671         case LFUN_CHAR_DELETE_FORWARD:
 672                 if (cur.pos() == cur.lastpos())
 673                         // May affect external cell:
 674                         recordUndoInset(cur, Undo::ATOMIC);
 675                 else
 676                         recordUndo(cur, Undo::ATOMIC);
 677                 // if the inset can not be removed from within, delete it
 678                 if (!cur.erase()) {
 679                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 680                         cur.innerText()->dispatch(cur, cmd);
 681                 }
 682                 break;
 683
 684         case LFUN_ESCAPE:
 685                 if (cur.selection())
 686                         cur.clearSelection();
 687                 else  {
 688                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 689                         cur.undispatched();
 690                 }
 691                 break;
 692
 693         case LFUN_INSET_TOGGLE:
 694                 recordUndo(cur);
 695                 lock(!lock());
 696                 cur.popRight();
 697                 break;
 698
 699         case LFUN_SELF_INSERT:
 700                 if (cmd.argument().size() != 1) {
 701                         recordUndo(cur);
 702                         docstring const arg = cmd.argument();
 703                         if (!interpretString(cur, arg))
 704                                 cur.insert(arg);
 705                         break;
 706                 }
 707                 // Don't record undo steps if we are in macro mode and
 708                 // cmd.argument is the next character of the macro name.
 709                 // Otherwise we'll get an invalid cursor if we undo after
 710                 // the macro was finished and the macro is a known command,
 711                 // e.g. sqrt. Cursor::macroModeClose replaces in this case
 712                 // the InsetMathUnknown with name "frac" by an empty
 713                 // InsetMathFrac -> a pos value > 0 is invalid.
 714                 // A side effect is that an undo before the macro is finished
 715                 // undoes the complete macro, not only the last character.
 716                 if (!cur.inMacroMode())
 717                         recordUndo(cur);
 718
 719                 // spacial handling of space. If we insert an inset
 720                 // via macro mode, we want to put the cursor inside it
 721                 // if relevant. Think typing "\frac<space>".
 722                 if (cmd.argument()[0] == ' '
 723                     && cur.inMacroMode() && cur.macroName() != "\\"
 724                     && cur.macroModeClose()) {
 725                         MathAtom const atom = cur.prevAtom();
 726                         if (atom->asNestInset() && atom->nargs() > 0) {
 727                                 cur.posLeft();
 728                                 cur.pushLeft(*cur.nextInset());
 729                         }
 730                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 731                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 732                         cur.undispatched();
 733                 }
 734                 break;
 735
 736         //case LFUN_SERVER_GET_XY:
 737         //      sprintf(dispatch_buffer, "%d %d",);
 738         //      break;
 739
 740         case LFUN_SERVER_SET_XY: {
 741                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 742                 int x = 0;
 743                 int y = 0;
 744                 istringstream is(to_utf8(cmd.argument()));
 745                 is >> x >> y;
 746                 cur.setScreenPos(x, y);
 747                 break;
 748         }
 749
 750         // Special casing for superscript in case of LyX handling
 751         // dead-keys:
 752         case LFUN_ACCENT_CIRCUMFLEX:
 753                 if (cmd.argument().empty()) {
 754                         // do superscript if LyX handles
 755                         // deadkeys
 756                         recordUndo(cur, Undo::ATOMIC);
 757                         script(cur, true, grabAndEraseSelection(cur));
 758                 }
 759                 break;
 760
 761         case LFUN_ACCENT_UMLAUT:
 762         case LFUN_ACCENT_ACUTE:
 763         case LFUN_ACCENT_GRAVE:
 764         case LFUN_ACCENT_BREVE:
 765         case LFUN_ACCENT_DOT:
 766         case LFUN_ACCENT_MACRON:
 767         case LFUN_ACCENT_CARON:
 768         case LFUN_ACCENT_TILDE:
 769         case LFUN_ACCENT_CEDILLA:
 770         case LFUN_ACCENT_CIRCLE:
 771         case LFUN_ACCENT_UNDERDOT:
 772         case LFUN_ACCENT_TIE:
 773         case LFUN_ACCENT_OGONEK:
 774         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 775                 break;
 776
 777         //  Math fonts
 778         case LFUN_FONT_FREE_APPLY:
 779         case LFUN_FONT_FREE_UPDATE:
 780                 handleFont2(cur, cmd.argument());
 781                 break;
 782
 783         case LFUN_FONT_BOLD:
 784                 if (currentMode() == TEXT_MODE)
 785                         handleFont(cur, cmd.argument(), "textbf");
 786                 else
 787                         handleFont(cur, cmd.argument(), "mathbf");
 788                 break;
 789         case LFUN_FONT_SANS:
 790                 if (currentMode() == TEXT_MODE)
 791                         handleFont(cur, cmd.argument(), "textsf");
 792                 else
 793                         handleFont(cur, cmd.argument(), "mathsf");
 794                 break;
 795         case LFUN_FONT_EMPH:
 796                 if (currentMode() == TEXT_MODE)
 797                         handleFont(cur, cmd.argument(), "emph");
 798                 else
 799                         handleFont(cur, cmd.argument(), "mathcal");
 800                 break;
 801         case LFUN_FONT_ROMAN:
 802                 if (currentMode() == TEXT_MODE)
 803                         handleFont(cur, cmd.argument(), "textrm");
 804                 else
 805                         handleFont(cur, cmd.argument(), "mathrm");
 806                 break;
 807         case LFUN_FONT_CODE:
 808                 if (currentMode() == TEXT_MODE)
 809                         handleFont(cur, cmd.argument(), "texttt");
 810                 else
 811                         handleFont(cur, cmd.argument(), "mathtt");
 812                 break;
 813         case LFUN_FONT_FRAK:
 814                 handleFont(cur, cmd.argument(), "mathfrak");
 815                 break;
 816         case LFUN_FONT_ITAL:
 817                 if (currentMode() == TEXT_MODE)
 818                         handleFont(cur, cmd.argument(), "textit");
 819                 else
 820                         handleFont(cur, cmd.argument(), "mathit");
 821                 break;
 822         case LFUN_FONT_NOUN:
 823                 if (currentMode() == TEXT_MODE)
 824                         // FIXME: should be "noun"
 825                         handleFont(cur, cmd.argument(), "textsc");
 826                 else
 827                         handleFont(cur, cmd.argument(), "mathbb");
 828                 break;
 829         /*
 830         case LFUN_FONT_FREE_APPLY:
 831                 handleFont(cur, cmd.argument(), "textrm");
 832                 break;
 833         */
 834         case LFUN_FONT_DEFAULT:
 835                 handleFont(cur, cmd.argument(), "textnormal");
 836                 break;
 837
 838         case LFUN_MATH_MODE: {
 839 #if 1
 840                 // ignore math-mode on when already in math mode
 841                 if (currentMode() == Inset::MATH_MODE && cmd.argument() == "on")
 842                         break;
 843                 cur.macroModeClose();
 844                 docstring const save_selection = grabAndEraseSelection(cur);
 845                 selClearOrDel(cur);
 846                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 847                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 848                 cur.posLeft();
 849                 cur.pushLeft(*cur.nextInset());
 850                 cur.niceInsert(save_selection);
 851 #else
 852                 if (currentMode() == Inset::TEXT_MODE) {
 853                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 854                         cur.message(_("create new math text environment ($...$)"));
 855                 } else {
 856                         handleFont(cur, cmd.argument(), "textrm");
 857                         cur.message(_("entered math text mode (textrm)"));
 858                 }
 859 #endif
 860                 break;
 861         }
 862
 863         case LFUN_MATH_SIZE:
 864 #if 0
 865                 recordUndo(cur);
 866                 cur.setSize(arg);
 867 #endif
 868                 break;
 869
 870         case LFUN_MATH_MATRIX: {
 871                 recordUndo(cur, Undo::ATOMIC);
 872                 unsigned int m = 1;
 873                 unsigned int n = 1;
 874                 docstring v_align;
 875                 docstring h_align;
 876                 idocstringstream is(cmd.argument());
 877                 is >> m >> n >> v_align >> h_align;
 878                 if (m < 1)
 879                         m = 1;
 880                 if (n < 1)
 881                         n = 1;
 882                 v_align += 'c';
 883                 cur.niceInsert(
 884                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 885                 break;
 886         }
 887
 888         case LFUN_MATH_DELIM: {
 889                 docstring ls;
 890                 docstring rs = support::split(cmd.argument(), ls, ' ');
 891                 // Reasonable default values
 892                 if (ls.empty())
 893                         ls = '(';
 894                 if (rs.empty())
 895                         rs = ')';
 896                 recordUndo(cur, Undo::ATOMIC);
 897                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 898                 break;
 899         }
 900
 901         case LFUN_MATH_BIGDELIM: {
 902                 docstring const lname  = from_utf8(cmd.getArg(0));
 903                 docstring const ldelim = from_utf8(cmd.getArg(1));
 904                 docstring const rname  = from_utf8(cmd.getArg(2));
 905                 docstring const rdelim = from_utf8(cmd.getArg(3));
 906                 latexkeys const * l = in_word_set(lname);
 907                 bool const have_l = l && l->inset == "big" &&
 908                                     InsetMathBig::isBigInsetDelim(ldelim);
 909                 l = in_word_set(rname);
 910                 bool const have_r = l && l->inset == "big" &&
 911                                     InsetMathBig::isBigInsetDelim(rdelim);
 912                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 913                 // or right delimiter.
 914                 if (have_l || have_r) {
 915                         recordUndo(cur, Undo::ATOMIC);
 916                         docstring const selection = grabAndEraseSelection(cur);
 917                         selClearOrDel(cur);
 918                         if (have_l)
 919                                 cur.insert(MathAtom(new InsetMathBig(lname,
 920                                                                 ldelim)));
 921                         cur.niceInsert(selection);
 922                         if (have_r)
 923                                 cur.insert(MathAtom(new InsetMathBig(rname,
 924                                                                 rdelim)));
 925                 }
 926                 // Don't call cur.undispatched() if we did nothing, this would
 927                 // lead to infinite recursion via Text::dispatch().
 928                 break;
 929         }
 930
 931         case LFUN_SPACE_INSERT:
 932         case LFUN_MATH_SPACE:
 933                 recordUndo(cur, Undo::ATOMIC);
 934                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 935                 break;
 936
 937         case LFUN_ERT_INSERT:
 938                 // interpret this as if a backslash was typed
 939                 recordUndo(cur, Undo::ATOMIC);
 940                 interpretChar(cur, '\\');
 941                 break;
 942
 943         case LFUN_MATH_SUBSCRIPT:
 944                 // interpret this as if a _ was typed
 945                 recordUndo(cur, Undo::ATOMIC);
 946                 interpretChar(cur, '_');
 947                 break;
 948
 949         case LFUN_MATH_SUPERSCRIPT:
 950                 // interpret this as if a ^ was typed
 951                 recordUndo(cur, Undo::ATOMIC);
 952                 interpretChar(cur, '^');
 953                 break;
 954
 955         case LFUN_QUOTE_INSERT:
 956                 // interpret this as if a straight " was typed
 957                 recordUndo(cur, Undo::ATOMIC);
 958                 interpretChar(cur, '\"');
 959                 break;
 960
 961 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 962 // handling such that "self-insert" works on "arbitrary stuff" too, and
 963 // math-insert only handles special math things like "matrix".
 964         case LFUN_MATH_INSERT: {
 965                 recordUndo(cur, Undo::ATOMIC);
 966                 if (cmd.argument() == "^" || cmd.argument() == "_") {
 967                         interpretChar(cur, cmd.argument()[0]);
 968                 } else
 969                         cur.niceInsert(cmd.argument());
 970                 break;
 971                 }
 972
 973         case LFUN_DIALOG_SHOW_NEW_INSET: {
 974                 docstring const & name = cmd.argument();
 975                 string data;
 976                 if (name == "ref") {
 977                         InsetMathRef tmp(name);
 978                         data = tmp.createDialogStr(to_utf8(name));
 979                 }
 980                 cur.bv().showInsetDialog(to_utf8(name), data, 0);
 981                 break;
 982         }
 983
 984         case LFUN_INSET_INSERT: {
 985                 MathData ar;
 986                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
 987                         recordUndo(cur);
 988                         cur.insert(ar);
 989                 } else
 990                         cur.undispatched();
 991                 break;
 992         }
 993
 994         default:
 995                 InsetMath::doDispatch(cur, cmd);
 996                 break;
 997         }
 998 }
 999
1000
1001 bool InsetMathNest::getStatus(Cursor & cur, FuncRequest const & cmd,
1002                 FuncStatus & flag) const
1003 {
1004         // the font related toggles
1005         //string tc = "mathnormal";
1006         bool ret = true;
1007         string const arg = to_utf8(cmd.argument());
1008         switch (cmd.action) {
1009         case LFUN_TABULAR_FEATURE:
1010                 flag.enabled(false);
1011                 break;
1012 #if 0
1013         case LFUN_TABULAR_FEATURE:
1014                 // FIXME: check temporarily disabled
1015                 // valign code
1016                 char align = mathcursor::valign();
1017                 if (align == '\0') {
1018                         enable = false;
1019                         break;
1020                 }
1021                 if (cmd.argument().empty()) {
1022                         flag.clear();
1023                         break;
1024                 }
1025                 if (!contains("tcb", cmd.argument()[0])) {
1026                         enable = false;
1027                         break;
1028                 }
1029                 flag.setOnOff(cmd.argument()[0] == align);
1030                 break;
1031 #endif
1032         /// We have to handle them since 1.4 blocks all unhandled actions
1033         case LFUN_FONT_ITAL:
1034         case LFUN_FONT_BOLD:
1035         case LFUN_FONT_SANS:
1036         case LFUN_FONT_EMPH:
1037         case LFUN_FONT_CODE:
1038         case LFUN_FONT_NOUN:
1039         case LFUN_FONT_ROMAN:
1040         case LFUN_FONT_DEFAULT:
1041                 flag.enabled(true);
1042                 break;
1043         case LFUN_MATH_MUTATE:
1044                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1045                 flag.setOnOff(false);
1046                 break;
1047
1048         // we just need to be in math mode to enable that
1049         case LFUN_MATH_SIZE:
1050         case LFUN_MATH_SPACE:
1051         case LFUN_MATH_LIMITS:
1052         case LFUN_MATH_NONUMBER:
1053         case LFUN_MATH_NUMBER:
1054         case LFUN_MATH_EXTERN:
1055                 flag.enabled(true);
1056                 break;
1057
1058         case LFUN_FONT_FRAK:
1059                 flag.enabled(currentMode() != TEXT_MODE);
1060                 break;
1061
1062         case LFUN_MATH_INSERT: {
1063                 bool const textarg =
1064                         arg == "\\textbf"   || arg == "\\textsf" ||
1065                         arg == "\\textrm"   || arg == "\\textmd" ||
1066                         arg == "\\textit"   || arg == "\\textsc" ||
1067                         arg == "\\textsl"   || arg == "\\textup" ||
1068                         arg == "\\texttt"   || arg == "\\textbb" ||
1069                         arg == "\\textnormal";
1070                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1071                 break;
1072         }
1073
1074         case LFUN_MATH_MATRIX:
1075                 flag.enabled(currentMode() == MATH_MODE);
1076                 break;
1077
1078         case LFUN_INSET_INSERT: {
1079                 // Don't test createMathInset_fromDialogStr(), since
1080                 // getStatus is not called with a valid reference and the
1081                 // dialog would not be applyable.
1082                 string const name = cmd.getArg(0);
1083                 flag.enabled(name == "ref");
1084                 break;
1085         }
1086
1087         case LFUN_MATH_DELIM:
1088         case LFUN_MATH_BIGDELIM:
1089                 // Don't do this with multi-cell selections
1090                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1091                 break;
1092
1093         case LFUN_HYPHENATION_POINT_INSERT:
1094         case LFUN_LIGATURE_BREAK_INSERT:
1095         case LFUN_MENU_SEPARATOR_INSERT:
1096         case LFUN_DOTS_INSERT:
1097         case LFUN_END_OF_SENTENCE_PERIOD_INSERT:
1098                 // FIXME: These would probably make sense in math-text mode
1099                 flag.enabled(false);
1100                 break;
1101
1102         default:
1103                 ret = false;
1104                 break;
1105         }
1106         return ret;
1107 }
1108
1109
1110 void InsetMathNest::edit(Cursor & cur, bool left)
1111 {
1112         cur.push(*this);
1113         cur.idx() = left ? 0 : cur.lastidx();
1114         cur.pos() = left ? 0 : cur.lastpos();
1115         cur.resetAnchor();
1116         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1117 }
1118
1119
1120 Inset * InsetMathNest::editXY(Cursor & cur, int x, int y)
1121 {
1122         int idx_min = 0;
1123         int dist_min = 1000000;
1124         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1125                 int const d = cell(i).dist(cur.bv(), x, y);
1126                 if (d < dist_min) {
1127                         dist_min = d;
1128                         idx_min = i;
1129                 }
1130         }
1131         MathData & ar = cell(idx_min);
1132         cur.push(*this);
1133         cur.idx() = idx_min;
1134         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1135
1136         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1137         if (dist_min == 0) {
1138                 // hit inside cell
1139                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1140                         if (ar[i]->covers(cur.bv(), x, y))
1141                                 return ar[i].nucleus()->editXY(cur, x, y);
1142         }
1143         return this;
1144 }
1145
1146
1147 void InsetMathNest::lfunMousePress(Cursor & cur, FuncRequest & cmd)
1148 {
1149         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1150         BufferView & bv = cur.bv();
1151         if (cmd.button() == mouse_button::button1) {
1152                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1153                 bv.mouseSetCursor(cur);
1154                 // Update the cursor update flags as needed:
1155                 //
1156                 // Update::Decoration: tells to update the decoration (visual box
1157                 //                     corners that define the inset)/
1158                 // Update::FitCursor: adjust the screen to the cursor position if
1159                 //                    needed
1160                 // cur.result().update(): don't overwrite previously set flags.
1161                 cur.updateFlags(Update::Decoration | Update::FitCursor | cur.result().update());
1162         } else if (cmd.button() == mouse_button::button2) {
1163                 MathData ar;
1164                 if (cap::selection()) {
1165                         // See comment in Text::dispatch why we do this
1166                         cap::copySelectionToStack();
1167                         cmd = FuncRequest(LFUN_PASTE, "0");
1168                         doDispatch(cur, cmd);
1169                 } else
1170                         asArray(theSelection().get(), ar);
1171
1172                 cur.insert(ar);
1173                 bv.mouseSetCursor(cur);
1174         }
1175 }
1176
1177
1178 void InsetMathNest::lfunMouseMotion(Cursor & cur, FuncRequest & cmd)
1179 {
1180         // only select with button 1
1181         if (cmd.button() == mouse_button::button1) {
1182                 Cursor & bvcur = cur.bv().cursor();
1183                 if (bvcur.anchor_.hasPart(cur)) {
1184                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1185                         bvcur.setCursor(cur);
1186                         bvcur.selection() = true;
1187                         //lyxerr << "MOTION " << bvcur << endl;
1188                 } else
1189                         cur.undispatched();
1190         }
1191 }
1192
1193
1194 void InsetMathNest::lfunMouseRelease(Cursor & cur, FuncRequest & cmd)
1195 {
1196         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1197
1198         if (cmd.button() == mouse_button::button1) {
1199                 if (!cur.selection())
1200                         cur.noUpdate();
1201                 else {
1202                         Cursor & bvcur = cur.bv().cursor();
1203                         bvcur.selection() = true;
1204                         cap::saveSelection(bvcur);
1205                 }
1206                 return;
1207         }
1208
1209         cur.undispatched();
1210 }
1211
1212
1213 bool InsetMathNest::interpretChar(Cursor & cur, char_type c)
1214 {
1215         //lyxerr << "interpret 2: '" << c << "'" << endl;
1216         docstring save_selection;
1217         if (c == '^' || c == '_')
1218                 save_selection = grabAndEraseSelection(cur);
1219
1220         cur.clearTargetX();
1221
1222         // handle macroMode
1223         if (cur.inMacroMode()) {
1224                 docstring name = cur.macroName();
1225
1226                 /// are we currently typing '#1' or '#2' or...?
1227                 if (name == "\\#") {
1228                         cur.backspace();
1229                         int n = c - '0';
1230                         if (n >= 1 && n <= 9)
1231                                 cur.insert(new MathMacroArgument(n));
1232                         return true;
1233                 }
1234
1235                 if (isAlphaASCII(c)) {
1236                         cur.activeMacro()->setName(name + docstring(1, c));
1237                         return true;
1238                 }
1239
1240                 // handle 'special char' macros
1241                 if (name == "\\") {
1242                         // remove the '\\'
1243                         if (c == '\\') {
1244                                 cur.backspace();
1245                                 if (currentMode() == InsetMath::TEXT_MODE)
1246                                         cur.niceInsert(createInsetMath("textbackslash"));
1247                                 else
1248                                         cur.niceInsert(createInsetMath("backslash"));
1249                         } else if (c == '{') {
1250                                 cur.backspace();
1251                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1252                         } else if (c == '%') {
1253                                 cur.backspace();
1254                                 cur.niceInsert(MathAtom(new InsetMathComment));
1255                         } else if (c == '#') {
1256                                 BOOST_ASSERT(cur.activeMacro());
1257                                 cur.activeMacro()->setName(name + docstring(1, c));
1258                         } else {
1259                                 cur.backspace();
1260                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1261                         }
1262                         return true;
1263                 }
1264
1265                 // One character big delimiters. The others are handled in
1266                 // interpretString().
1267                 latexkeys const * l = in_word_set(name.substr(1));
1268                 if (name[0] == '\\' && l && l->inset == "big") {
1269                         docstring delim;
1270                         switch (c) {
1271                         case '{':
1272                                 delim = from_ascii("\\{");
1273                                 break;
1274                         case '}':
1275                                 delim = from_ascii("\\}");
1276                                 break;
1277                         default:
1278                                 delim = docstring(1, c);
1279                                 break;
1280                         }
1281                         if (InsetMathBig::isBigInsetDelim(delim)) {
1282                                 // name + delim ared a valid InsetMathBig.
1283                                 // We can't use cur.macroModeClose() because
1284                                 // it does not handle delim.
1285                                 InsetMathUnknown * p = cur.activeMacro();
1286                                 p->finalize();
1287                                 --cur.pos();
1288                                 cur.cell().erase(cur.pos());
1289                                 cur.plainInsert(MathAtom(
1290                                         new InsetMathBig(name.substr(1), delim)));
1291                                 return true;
1292                         }
1293                 }
1294
1295                 // leave macro mode and try again if necessary
1296                 cur.macroModeClose();
1297                 if (c == '{')
1298                         cur.niceInsert(MathAtom(new InsetMathBrace));
1299                 else if (c != ' ')
1300                         interpretChar(cur, c);
1301                 return true;
1302         }
1303
1304         // This is annoying as one has to press <space> far too often.
1305         // Disable it.
1306
1307 #if 0
1308                 // leave autocorrect mode if necessary
1309                 if (autocorrect() && c == ' ') {
1310                         autocorrect() = false;
1311                         return true;
1312                 }
1313 #endif
1314
1315         // just clear selection on pressing the space bar
1316         if (cur.selection() && c == ' ') {
1317                 cur.selection() = false;
1318                 return true;
1319         }
1320
1321         selClearOrDel(cur);
1322
1323         if (c == '\\') {
1324                 //lyxerr << "starting with macro" << endl;
1325                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1326                 return true;
1327         }
1328
1329         if (c == '\n') {
1330                 if (currentMode() == InsetMath::TEXT_MODE)
1331                         cur.insert(c);
1332                 return true;
1333         }
1334
1335         if (c == ' ') {
1336                 if (currentMode() == InsetMath::TEXT_MODE) {
1337                         // insert spaces in text mode,
1338                         // but suppress direct insertion of two spaces in a row
1339                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1340                         // it is better than nothing...
1341                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ') {
1342                                 cur.insert(c);
1343                                 // FIXME: we have to enable full redraw here because of the
1344                                 // visual box corners that define the inset. If we know for
1345                                 // sure that we stay within the same cell we can optimize for
1346                                 // that using:
1347                                 //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1348                         }
1349                         return true;
1350                 }
1351                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1352                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1353                         // FIXME: we have to enable full redraw here because of the
1354                         // visual box corners that define the inset. If we know for
1355                         // sure that we stay within the same cell we can optimize for
1356                         // that using:
1357                         //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1358                         return true;
1359                 }
1360
1361                 if (cur.popRight()) {
1362                         // FIXME: we have to enable full redraw here because of the
1363                         // visual box corners that define the inset. If we know for
1364                         // sure that we stay within the same cell we can optimize for
1365                         // that using:
1366                         //cur.updateFlags(Update::FitCursor);
1367                         return true;
1368                 }
1369
1370                 // if we are at the very end, leave the formula
1371                 return cur.pos() != cur.lastpos();
1372         }
1373
1374         // These shouldn't work in text mode:
1375         if (currentMode() != InsetMath::TEXT_MODE) {
1376                 if (c == '_') {
1377                         script(cur, false, save_selection);
1378                         return true;
1379                 }
1380                 if (c == '^') {
1381                         script(cur, true, save_selection);
1382                         return true;
1383                 }
1384                 if (c == '~') {
1385                         cur.niceInsert(createInsetMath("sim"));
1386                         return true;
1387                 }
1388         }
1389
1390         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1391             c == '%' || c == '_' || c == '^') {
1392                 cur.niceInsert(createInsetMath(docstring(1, c)));
1393                 return true;
1394         }
1395
1396
1397         // try auto-correction
1398         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1399         //      return true;
1400
1401         // no special circumstances, so insert the character without any fuss
1402         cur.insert(c);
1403         cur.autocorrect() = true;
1404         return true;
1405 }
1406
1407
1408 bool InsetMathNest::interpretString(Cursor & cur, docstring const & str)
1409 {
1410         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1411         // possible
1412         if (!cur.empty() && cur.pos() > 0 &&
1413             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1414                 if (InsetMathBig::isBigInsetDelim(str)) {
1415                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1416                         if (prev[0] == '\\') {
1417                                 prev = prev.substr(1);
1418                                 latexkeys const * l = in_word_set(prev);
1419                                 if (l && l->inset == "big") {
1420                                         cur.cell()[cur.pos() - 1] =
1421                                                 MathAtom(new InsetMathBig(prev, str));
1422                                         return true;
1423                                 }
1424                         }
1425                 }
1426         }
1427         return false;
1428 }
1429
1430
1431 bool InsetMathNest::script(Cursor & cur, bool up,
1432                 docstring const & save_selection)
1433 {
1434         // Hack to get \^ and \_ working
1435         //lyxerr << "handling script: up: " << up << endl;
1436         if (cur.inMacroMode() && cur.macroName() == "\\") {
1437                 if (up)
1438                         cur.niceInsert(createInsetMath("mathcircumflex"));
1439                 else
1440                         interpretChar(cur, '_');
1441                 return true;
1442         }
1443
1444         cur.macroModeClose();
1445         if (asScriptInset() && cur.idx() == 0) {
1446                 // we are in a nucleus of a script inset, move to _our_ script
1447                 InsetMathScript * inset = asScriptInset();
1448                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1449                 inset->ensure(up);
1450                 cur.idx() = inset->idxOfScript(up);
1451                 cur.pos() = 0;
1452         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1453                 --cur.pos();
1454                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1455                 cur.push(*inset);
1456                 inset->ensure(up);
1457                 cur.idx() = inset->idxOfScript(up);
1458                 cur.pos() = cur.lastpos();
1459         } else {
1460                 // convert the thing to our left to a scriptinset or create a new
1461                 // one if in the very first position of the array
1462                 if (cur.pos() == 0) {
1463                         //lyxerr << "new scriptinset" << endl;
1464                         cur.insert(new InsetMathScript(up));
1465                 } else {
1466                         //lyxerr << "converting prev atom " << endl;
1467                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1468                 }
1469                 --cur.pos();
1470                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1471                 // See comment in MathParser.cpp for special handling of {}-bases
1472
1473                 cur.push(*inset);
1474                 cur.idx() = 1;
1475                 cur.pos() = 0;
1476         }
1477         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1478         cur.niceInsert(save_selection);
1479         cur.resetAnchor();
1480         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1481         return true;
1482 }
1483
1484
1485 } // namespace lyx