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 #include "frontends/nullpainter.h"
  56
  57 #include "funcrequest.h"
  58 #include "lyxserver.h"
  59 #include "lyxsocket.h"
  60
  61 #include <sstream>
  62
  63
  64 namespace lyx {
  65
  66 using cap::copySelection;
  67 using cap::grabAndEraseSelection;
  68 using cap::cutSelection;
  69 using cap::replaceSelection;
  70 using cap::selClearOrDel;
  71
  72 using std::endl;
  73 using std::string;
  74 using std::istringstream;
  75
  76
  77 InsetMathNest::InsetMathNest(idx_type nargs)
  78         : cells_(nargs), lock_(false)
  79 {}
  80
  81
  82 InsetMath::idx_type InsetMathNest::nargs() const
  83 {
  84         return cells_.size();
  85 }
  86
  87
  88 MathArray & InsetMathNest::cell(idx_type i)
  89 {
  90         return cells_[i];
  91 }
  92
  93
  94 MathArray const & InsetMathNest::cell(idx_type i) const
  95 {
  96         return cells_[i];
  97 }
  98
  99
 100 void InsetMathNest::cursorPos(BufferView const & bv,
 101                 CursorSlice const & sl, bool /*boundary*/,
 102                 int & x, int & y) const
 103 {
 104 // FIXME: This is a hack. Ideally, the coord cache should not store
 105 // absolute positions, but relative ones. This would mean to call
 106 // setXY() not in MathArray::draw(), but in the parent insets' draw()
 107 // with the correctly adjusted x,y values. But this means that we'd have
 108 // to touch all (math)inset's draw() methods. Right now, we'll store
 109 // absolute value, and make them here relative, only to make them
 110 // absolute again when actually drawing the cursor. What a mess.
 111         BOOST_ASSERT(ptr_cmp(&sl.inset(), this));
 112         MathArray const & ar = sl.cell();
 113         CoordCache const & coord_cache = bv.coordCache();
 114         if (!coord_cache.getArrays().has(&ar)) {
 115                 // this can (semi-)legally happen if we just created this cell
 116                 // and it never has been drawn before. So don't ASSERT.
 117                 //lyxerr << "no cached data for array " << &ar << endl;
 118                 x = 0;
 119                 y = 0;
 120                 return;
 121         }
 122         Point const pt = coord_cache.getArrays().xy(&ar);
 123         if (!coord_cache.getInsets().has(this)) {
 124                 // same as above
 125                 //lyxerr << "no cached data for inset " << this << endl;
 126                 x = 0;
 127                 y = 0;
 128                 return;
 129         }
 130         Point const pt2 = coord_cache.getInsets().xy(this);
 131         //lyxerr << "retrieving position cache for MathArray "
 132         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 133         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 134         y = pt.y_ - pt2.y_;
 135 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 136 //              << " asc: " << ascent() << "  des: " << descent()
 137 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 138         // move cursor visually into empty cells ("blue rectangles");
 139         if (ar.empty())
 140                 x += 2;
 141 }
 142
 143
 144 void InsetMathNest::metrics(MetricsInfo const & mi) const
 145 {
 146         MetricsInfo m = mi;
 147         for (idx_type i = 0, n = nargs(); i != n; ++i)
 148                 cell(i).metrics(m);
 149 }
 150
 151
 152 bool InsetMathNest::idxNext(LCursor & cur) const
 153 {
 154         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 155         if (cur.idx() == cur.lastidx())
 156                 return false;
 157         ++cur.idx();
 158         cur.pos() = 0;
 159         return true;
 160 }
 161
 162
 163 bool InsetMathNest::idxRight(LCursor & cur) const
 164 {
 165         return idxNext(cur);
 166 }
 167
 168
 169 bool InsetMathNest::idxPrev(LCursor & cur) const
 170 {
 171         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 172         if (cur.idx() == 0)
 173                 return false;
 174         --cur.idx();
 175         cur.pos() = cur.lastpos();
 176         return true;
 177 }
 178
 179
 180 bool InsetMathNest::idxLeft(LCursor & cur) const
 181 {
 182         return idxPrev(cur);
 183 }
 184
 185
 186 bool InsetMathNest::idxFirst(LCursor & cur) const
 187 {
 188         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 189         if (nargs() == 0)
 190                 return false;
 191         cur.idx() = 0;
 192         cur.pos() = 0;
 193         return true;
 194 }
 195
 196
 197 bool InsetMathNest::idxLast(LCursor & cur) const
 198 {
 199         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 200         if (nargs() == 0)
 201                 return false;
 202         cur.idx() = cur.lastidx();
 203         cur.pos() = cur.lastpos();
 204         return true;
 205 }
 206
 207
 208 void InsetMathNest::dump() const
 209 {
 210         odocstringstream oss;
 211         WriteStream os(oss);
 212         os << "---------------------------------------------\n";
 213         write(os);
 214         os << "\n";
 215         for (idx_type i = 0, n = nargs(); i != n; ++i)
 216                 os << cell(i) << "\n";
 217         os << "---------------------------------------------\n";
 218         lyxerr << to_utf8(oss.str());
 219 }
 220
 221
 222 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 223 {
 224 #if 0
 225         if (lock_)
 226                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 227                                         LColor::mathlockbg);
 228 #endif
 229         setPosCache(pi, x, y);
 230 }
 231
 232
 233 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 234 {
 235         BufferView & bv = *pi.base.bv;
 236         // this should use the x/y values given, not the cached values
 237         LCursor & cur = bv.cursor();
 238         if (!cur.selection())
 239                 return;
 240         if (!ptr_cmp(&cur.inset(), this))
 241                 return;
 242
 243         // FIXME: hack to get position cache warm
 244         pi.pain.setDrawingEnabled(false);
 245         draw(pi, x, y);
 246         pi.pain.setDrawingEnabled(true);
 247
 248         CursorSlice s1 = cur.selBegin();
 249         CursorSlice s2 = cur.selEnd();
 250
 251         //lyxerr << "InsetMathNest::drawing selection: "
 252         //      << " s1: " << s1 << " s2: " << s2 << endl;
 253         if (s1.idx() == s2.idx()) {
 254                 MathArray const & c = cell(s1.idx());
 255                 int x1 = c.xo(bv) + c.pos2x(s1.pos());
 256                 int y1 = c.yo(bv) - c.ascent();
 257                 int x2 = c.xo(bv) + c.pos2x(s2.pos());
 258                 int y2 = c.yo(bv) + c.descent();
 259                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 260         //lyxerr << "InsetMathNest::drawing selection 3: "
 261         //      << " x1: " << x1 << " x2: " << x2
 262         //      << " y1: " << y1 << " y2: " << y2 << endl;
 263         } else {
 264                 for (idx_type i = 0; i < nargs(); ++i) {
 265                         if (idxBetween(i, s1.idx(), s2.idx())) {
 266                                 MathArray const & c = cell(i);
 267                                 int x1 = c.xo(bv);
 268                                 int y1 = c.yo(bv) - c.ascent();
 269                                 int x2 = c.xo(bv) + c.width();
 270                                 int y2 = c.yo(bv) + c.descent();
 271                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 272                         }
 273                 }
 274         }
 275 }
 276
 277
 278 void InsetMathNest::validate(LaTeXFeatures & features) const
 279 {
 280         for (idx_type i = 0; i < nargs(); ++i)
 281                 cell(i).validate(features);
 282 }
 283
 284
 285 void InsetMathNest::replace(ReplaceData & rep)
 286 {
 287         for (idx_type i = 0; i < nargs(); ++i)
 288                 cell(i).replace(rep);
 289 }
 290
 291
 292 bool InsetMathNest::contains(MathArray const & ar) const
 293 {
 294         for (idx_type i = 0; i < nargs(); ++i)
 295                 if (cell(i).contains(ar))
 296                         return true;
 297         return false;
 298 }
 299
 300
 301 bool InsetMathNest::lock() const
 302 {
 303         return lock_;
 304 }
 305
 306
 307 void InsetMathNest::lock(bool l)
 308 {
 309         lock_ = l;
 310 }
 311
 312
 313 bool InsetMathNest::isActive() const
 314 {
 315         return nargs() > 0;
 316 }
 317
 318
 319 MathArray InsetMathNest::glue() const
 320 {
 321         MathArray ar;
 322         for (size_t i = 0; i < nargs(); ++i)
 323                 ar.append(cell(i));
 324         return ar;
 325 }
 326
 327
 328 void InsetMathNest::write(WriteStream & os) const
 329 {
 330         os << '\\' << name().c_str();
 331         for (size_t i = 0; i < nargs(); ++i)
 332                 os << '{' << cell(i) << '}';
 333         if (nargs() == 0)
 334                 os.pendingSpace(true);
 335         if (lock_ && !os.latex()) {
 336                 os << "\\lyxlock";
 337                 os.pendingSpace(true);
 338         }
 339 }
 340
 341
 342 void InsetMathNest::normalize(NormalStream & os) const
 343 {
 344         os << '[' << name().c_str();
 345         for (size_t i = 0; i < nargs(); ++i)
 346                 os << ' ' << cell(i);
 347         os << ']';
 348 }
 349
 350
 351 int InsetMathNest::latex(Buffer const &, odocstream & os,
 352                         OutputParams const & runparams) const
 353 {
 354         WriteStream wi(os, runparams.moving_arg, true);
 355         write(wi);
 356         return wi.line();
 357 }
 358
 359
 360 bool InsetMathNest::notifyCursorLeaves(LCursor & /*cur*/)
 361 {
 362 #ifdef WITH_WARNINGS
 363 #warning look here
 364 #endif
 365 #if 0
 366         MathArray & ar = cur.cell();
 367         // remove base-only "scripts"
 368         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 369                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 370                 if (p && p->nargs() == 1) {
 371                         MathArray ar = p->nuc();
 372                         erase(i);
 373                         insert(i, ar);
 374                         cur.adjust(i, ar.size() - 1);
 375                 }
 376         }
 377
 378         // glue adjacent font insets of the same kind
 379         for (pos_type i = 0; i + 1 < size(); ++i) {
 380                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 381                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 382                 if (p && q && p->name() == q->name()) {
 383                         p->cell(0).append(q->cell(0));
 384                         erase(i + 1);
 385                         cur.adjust(i, -1);
 386                 }
 387         }
 388 #endif
 389         return false;
 390 }
 391
 392
 393 void InsetMathNest::handleFont
 394         (LCursor & cur, docstring const & arg, char const * const font)
 395 {
 396         handleFont(cur, arg, from_ascii(font));
 397 }
 398
 399
 400 void InsetMathNest::handleFont
 401         (LCursor & cur, docstring const & arg, docstring const & font)
 402 {
 403         // this whole function is a hack and won't work for incremental font
 404         // changes...
 405         recordUndo(cur, Undo::ATOMIC);
 406
 407         if (cur.inset().asInsetMath()->name() == font)
 408                 cur.handleFont(to_utf8(font));
 409         else {
 410                 cur.handleNest(createInsetMath(font));
 411                 cur.insert(arg);
 412         }
 413 }
 414
 415
 416 void InsetMathNest::handleFont2(LCursor & cur, docstring const & arg)
 417 {
 418         recordUndo(cur, Undo::ATOMIC);
 419         LyXFont font;
 420         bool b;
 421         bv_funcs::string2font(to_utf8(arg), font, b);
 422         if (font.color() != LColor::inherit) {
 423                 MathAtom at = MathAtom(new InsetMathColor(true, font.color()));
 424                 cur.handleNest(at, 0);
 425         }
 426 }
 427
 428
 429 void InsetMathNest::doDispatch(LCursor & cur, FuncRequest & cmd)
 430 {
 431         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 432         //CursorSlice sl = cur.current();
 433
 434         switch (cmd.action) {
 435
 436         case LFUN_PASTE: {
 437                 recordUndo(cur);
 438                 cur.message(_("Paste"));
 439                 replaceSelection(cur);
 440                 size_t n = 0;
 441                 istringstream is(to_utf8(cmd.argument()));
 442                 is >> n;
 443                 docstring const selection = cap::getSelection(cur.buffer(), n);
 444                 cur.niceInsert(selection);
 445                 cur.clearSelection(); // bug 393
 446                 cur.bv().switchKeyMap();
 447                 finishUndo();
 448                 break;
 449         }
 450
 451         case LFUN_CUT:
 452                 recordUndo(cur);
 453                 cutSelection(cur, true, true);
 454                 cur.message(_("Cut"));
 455                 // Prevent stale position >= size crash
 456                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 457                 cur.normalize();
 458                 break;
 459
 460         case LFUN_COPY:
 461                 copySelection(cur);
 462                 // FIXME UNICODE
 463                 cur.message(_("Copy"));
 464                 break;
 465
 466         case LFUN_MOUSE_PRESS:
 467                 lfunMousePress(cur, cmd);
 468                 break;
 469
 470         case LFUN_MOUSE_MOTION:
 471                 lfunMouseMotion(cur, cmd);
 472                 break;
 473
 474         case LFUN_MOUSE_RELEASE:
 475                 lfunMouseRelease(cur, cmd);
 476                 break;
 477
 478         case LFUN_FINISHED_LEFT:
 479                 cur.bv().cursor() = cur;
 480                 break;
 481
 482         case LFUN_FINISHED_RIGHT:
 483                 ++cur.pos();
 484                 cur.bv().cursor() = cur;
 485                 break;
 486
 487         case LFUN_FINISHED_UP:
 488                 cur.bv().cursor() = cur;
 489                 break;
 490
 491         case LFUN_FINISHED_DOWN:
 492                 ++cur.pos();
 493                 cur.bv().cursor() = cur;
 494                 break;
 495
 496         case LFUN_CHAR_FORWARD_SELECT:
 497         case LFUN_CHAR_FORWARD:
 498                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 499                 cur.autocorrect() = false;
 500                 cur.clearTargetX();
 501                 cur.macroModeClose();
 502                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 503                         cur.pushLeft(*cur.nextAtom().nucleus());
 504                         cur.inset().idxFirst(cur);
 505                 } else if (cur.posRight() || idxRight(cur)
 506                         || cur.popRight() || cur.selection())
 507                         ;
 508                 else {
 509                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 510                         cur.undispatched();
 511                 }
 512                 break;
 513
 514         case LFUN_CHAR_BACKWARD_SELECT:
 515         case LFUN_CHAR_BACKWARD:
 516                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 517                 cur.autocorrect() = false;
 518                 cur.clearTargetX();
 519                 cur.macroModeClose();
 520                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 521                         cur.posLeft();
 522                         cur.push(*cur.nextAtom().nucleus());
 523                         cur.inset().idxLast(cur);
 524                 } else if (cur.posLeft() || idxLeft(cur)
 525                         || cur.popLeft() || cur.selection())
 526                         ;
 527                 else {
 528                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 529                         cur.undispatched();
 530                 }
 531                 break;
 532
 533         case LFUN_UP_SELECT:
 534         case LFUN_UP:
 535                 // FIXME Tried to use clearTargetX and macroModeClose, crashed on cur.up()
 536                 if (cur.inMacroMode()) {
 537                         // Make Helge happy
 538                         cur.macroModeClose();
 539                         break;
 540                 }
 541                 cur.selHandle(cmd.action == LFUN_UP_SELECT);
 542                 if (!cur.up()) {
 543                         cmd = FuncRequest(LFUN_FINISHED_UP);
 544                         cur.undispatched();
 545                 }
 546                 // fixes bug 1598. Please check!
 547                 cur.normalize();
 548                 break;
 549
 550         case LFUN_DOWN_SELECT:
 551         case LFUN_DOWN:
 552                 if (cur.inMacroMode()) {
 553                         cur.macroModeClose();
 554                         break;
 555                 }
 556                 cur.selHandle(cmd.action == LFUN_DOWN_SELECT);
 557                 if (!cur.down()) {
 558                         cmd = FuncRequest(LFUN_FINISHED_DOWN);
 559                         cur.undispatched();
 560                 }
 561                 // fixes bug 1598. Please check!
 562                 cur.normalize();
 563                 break;
 564
 565         case LFUN_MOUSE_DOUBLE:
 566         case LFUN_MOUSE_TRIPLE:
 567         case LFUN_WORD_SELECT:
 568                 cur.pos() = 0;
 569                 cur.idx() = 0;
 570                 cur.resetAnchor();
 571                 cur.selection() = true;
 572                 cur.pos() = cur.lastpos();
 573                 cur.idx() = cur.lastidx();
 574                 break;
 575
 576         case LFUN_PARAGRAPH_UP_SELECT:
 577         case LFUN_PARAGRAPH_UP:
 578         case LFUN_PARAGRAPH_DOWN_SELECT:
 579         case LFUN_PARAGRAPH_DOWN:
 580                 break;
 581
 582         case LFUN_LINE_BEGIN_SELECT:
 583         case LFUN_LINE_BEGIN:
 584         case LFUN_WORD_BACKWARD_SELECT:
 585         case LFUN_WORD_BACKWARD:
 586                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 587                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 588                 cur.macroModeClose();
 589                 if (cur.pos() != 0) {
 590                         cur.pos() = 0;
 591                 } else if (cur.col() != 0) {
 592                         cur.idx() -= cur.col();
 593                         cur.pos() = 0;
 594                 } else if (cur.idx() != 0) {
 595                         cur.idx() = 0;
 596                         cur.pos() = 0;
 597                 } else {
 598                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 599                         cur.undispatched();
 600                 }
 601                 break;
 602
 603         case LFUN_WORD_FORWARD_SELECT:
 604         case LFUN_WORD_FORWARD:
 605         case LFUN_LINE_END_SELECT:
 606         case LFUN_LINE_END:
 607                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 608                                 cmd.action == LFUN_LINE_END_SELECT);
 609                 cur.macroModeClose();
 610                 cur.clearTargetX();
 611                 if (cur.pos() != cur.lastpos()) {
 612                         cur.pos() = cur.lastpos();
 613                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 614                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 615                         cur.pos() = cur.lastpos();
 616                 } else if (cur.idx() != cur.lastidx()) {
 617                         cur.idx() = cur.lastidx();
 618                         cur.pos() = cur.lastpos();
 619                 } else {
 620                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 621                         cur.undispatched();
 622                 }
 623                 break;
 624
 625         case LFUN_SCREEN_UP_SELECT:
 626         case LFUN_SCREEN_UP:
 627                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 628                 cur.undispatched();
 629                 break;
 630
 631         case LFUN_SCREEN_DOWN_SELECT:
 632         case LFUN_SCREEN_DOWN:
 633                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 634                 cur.undispatched();
 635                 break;
 636
 637         case LFUN_CELL_FORWARD:
 638                 cur.inset().idxNext(cur);
 639                 break;
 640
 641         case LFUN_CELL_BACKWARD:
 642                 cur.inset().idxPrev(cur);
 643                 break;
 644
 645         case LFUN_WORD_DELETE_BACKWARD:
 646         case LFUN_CHAR_DELETE_BACKWARD:
 647                 if (cur.pos() == 0)
 648                         // May affect external cell:
 649                         recordUndoInset(cur, Undo::ATOMIC);
 650                 else
 651                         recordUndo(cur, Undo::ATOMIC);
 652                 cur.backspace();
 653                 break;
 654
 655         case LFUN_WORD_DELETE_FORWARD:
 656         case LFUN_CHAR_DELETE_FORWARD:
 657                 if (cur.pos() == cur.lastpos())
 658                         // May affect external cell:
 659                         recordUndoInset(cur, Undo::ATOMIC);
 660                 else
 661                         recordUndo(cur, Undo::ATOMIC);
 662                 cur.erase();
 663                 break;
 664
 665         case LFUN_ESCAPE:
 666                 if (cur.selection())
 667                         cur.clearSelection();
 668                 else  {
 669                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 670                         cur.undispatched();
 671                 }
 672                 break;
 673
 674         case LFUN_INSET_TOGGLE:
 675                 recordUndo(cur);
 676                 lock(!lock());
 677                 cur.popRight();
 678                 break;
 679
 680         case LFUN_SELF_INSERT:
 681                 if (cmd.argument().size() != 1) {
 682                         recordUndo(cur);
 683                         docstring const arg = cmd.argument();
 684                         if (!interpretString(cur, arg))
 685                                 cur.insert(arg);
 686                         break;
 687                 }
 688                 // Don't record undo steps if we are in macro mode and
 689                 // cmd.argument is the next character of the macro name.
 690                 // Otherwise we'll get an invalid cursor if we undo after
 691                 // the macro was finished and the macro is a known command,
 692                 // e.g. sqrt. LCursor::macroModeClose replaces in this case
 693                 // the InsetMathUnknown with name "frac" by an empty
 694                 // InsetMathFrac -> a pos value > 0 is invalid.
 695                 // A side effect is that an undo before the macro is finished
 696                 // undoes the complete macro, not only the last character.
 697                 if (!cur.inMacroMode())
 698                         recordUndo(cur);
 699
 700                 // spacial handling of space. If we insert an inset
 701                 // via macro mode, we want to put the cursor inside it
 702                 // if relevant. Think typing "\frac<space>".
 703                 if (cmd.argument()[0] == ' '
 704                     && cur.inMacroMode() && cur.macroName() != "\\"
 705                     && cur.macroModeClose()) {
 706                         MathAtom const atom = cur.prevAtom();
 707                         if (atom->asNestInset() && atom->nargs() > 0) {
 708                                 cur.posLeft();
 709                                 cur.pushLeft(*cur.nextInset());
 710                         }
 711                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 712                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 713                         cur.undispatched();
 714                 }
 715                 break;
 716
 717         //case LFUN_SERVER_GET_XY:
 718         //      sprintf(dispatch_buffer, "%d %d",);
 719         //      break;
 720
 721         case LFUN_SERVER_SET_XY: {
 722                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 723                 int x = 0;
 724                 int y = 0;
 725                 istringstream is(to_utf8(cmd.argument()));
 726                 is >> x >> y;
 727                 cur.setScreenPos(x, y);
 728                 break;
 729         }
 730
 731         // Special casing for superscript in case of LyX handling
 732         // dead-keys:
 733         case LFUN_ACCENT_CIRCUMFLEX:
 734                 if (cmd.argument().empty()) {
 735                         // do superscript if LyX handles
 736                         // deadkeys
 737                         recordUndo(cur, Undo::ATOMIC);
 738                         script(cur, true, grabAndEraseSelection(cur));
 739                 }
 740                 break;
 741
 742         case LFUN_ACCENT_UMLAUT:
 743         case LFUN_ACCENT_ACUTE:
 744         case LFUN_ACCENT_GRAVE:
 745         case LFUN_ACCENT_BREVE:
 746         case LFUN_ACCENT_DOT:
 747         case LFUN_ACCENT_MACRON:
 748         case LFUN_ACCENT_CARON:
 749         case LFUN_ACCENT_TILDE:
 750         case LFUN_ACCENT_CEDILLA:
 751         case LFUN_ACCENT_CIRCLE:
 752         case LFUN_ACCENT_UNDERDOT:
 753         case LFUN_ACCENT_TIE:
 754         case LFUN_ACCENT_OGONEK:
 755         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 756                 break;
 757
 758         //  Math fonts
 759         case LFUN_FONT_FREE_APPLY:
 760         case LFUN_FONT_FREE_UPDATE:
 761                 handleFont2(cur, cmd.argument());
 762                 break;
 763
 764         case LFUN_FONT_BOLD:
 765                 if (currentMode() == TEXT_MODE)
 766                         handleFont(cur, cmd.argument(), "textbf");
 767                 else
 768                         handleFont(cur, cmd.argument(), "mathbf");
 769                 break;
 770         case LFUN_FONT_SANS:
 771                 if (currentMode() == TEXT_MODE)
 772                         handleFont(cur, cmd.argument(), "textsf");
 773                 else
 774                         handleFont(cur, cmd.argument(), "mathsf");
 775                 break;
 776         case LFUN_FONT_EMPH:
 777                 if (currentMode() == TEXT_MODE)
 778                         handleFont(cur, cmd.argument(), "emph");
 779                 else
 780                         handleFont(cur, cmd.argument(), "mathcal");
 781                 break;
 782         case LFUN_FONT_ROMAN:
 783                 if (currentMode() == TEXT_MODE)
 784                         handleFont(cur, cmd.argument(), "textrm");
 785                 else
 786                         handleFont(cur, cmd.argument(), "mathrm");
 787                 break;
 788         case LFUN_FONT_CODE:
 789                 if (currentMode() == TEXT_MODE)
 790                         handleFont(cur, cmd.argument(), "texttt");
 791                 else
 792                         handleFont(cur, cmd.argument(), "mathtt");
 793                 break;
 794         case LFUN_FONT_FRAK:
 795                 handleFont(cur, cmd.argument(), "mathfrak");
 796                 break;
 797         case LFUN_FONT_ITAL:
 798                 if (currentMode() == TEXT_MODE)
 799                         handleFont(cur, cmd.argument(), "textit");
 800                 else
 801                         handleFont(cur, cmd.argument(), "mathit");
 802                 break;
 803         case LFUN_FONT_NOUN:
 804                 if (currentMode() == TEXT_MODE)
 805                         // FIXME: should be "noun"
 806                         handleFont(cur, cmd.argument(), "textsc");
 807                 else
 808                         handleFont(cur, cmd.argument(), "mathbb");
 809                 break;
 810         //case LFUN_FONT_FREE_APPLY:
 811                 handleFont(cur, cmd.argument(), "textrm");
 812                 break;
 813         case LFUN_FONT_DEFAULT:
 814                 handleFont(cur, cmd.argument(), "textnormal");
 815                 break;
 816
 817         case LFUN_MATH_MODE: {
 818 #if 1
 819                 // ignore math-mode on when already in math mode
 820                 if (currentMode() == InsetBase::MATH_MODE && cmd.argument() == "on")
 821                         break;
 822                 cur.macroModeClose();
 823                 docstring const save_selection = grabAndEraseSelection(cur);
 824                 selClearOrDel(cur);
 825                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 826                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 827                 cur.posLeft();
 828                 cur.pushLeft(*cur.nextInset());
 829                 cur.niceInsert(save_selection);
 830 #else
 831                 if (currentMode() == InsetBase::TEXT_MODE) {
 832                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 833                         cur.message(_("create new math text environment ($...$)"));
 834                 } else {
 835                         handleFont(cur, cmd.argument(), "textrm");
 836                         cur.message(_("entered math text mode (textrm)"));
 837                 }
 838 #endif
 839                 break;
 840         }
 841
 842         case LFUN_MATH_SIZE:
 843 #if 0
 844                 recordUndo(cur);
 845                 cur.setSize(arg);
 846 #endif
 847                 break;
 848
 849         case LFUN_MATH_MATRIX: {
 850                 recordUndo(cur, Undo::ATOMIC);
 851                 unsigned int m = 1;
 852                 unsigned int n = 1;
 853                 docstring v_align;
 854                 docstring h_align;
 855                 idocstringstream is(cmd.argument());
 856                 is >> m >> n >> v_align >> h_align;
 857                 if (m < 1)
 858                         m = 1;
 859                 if (n < 1)
 860                         n = 1;
 861                 v_align += 'c';
 862                 cur.niceInsert(
 863                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 864                 break;
 865         }
 866
 867         case LFUN_MATH_DELIM: {
 868                 docstring ls;
 869                 docstring rs = support::split(cmd.argument(), ls, ' ');
 870                 // Reasonable default values
 871                 if (ls.empty())
 872                         ls = '(';
 873                 if (rs.empty())
 874                         rs = ')';
 875                 recordUndo(cur, Undo::ATOMIC);
 876                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 877                 break;
 878         }
 879
 880         case LFUN_MATH_BIGDELIM: {
 881                 docstring const lname  = from_utf8(cmd.getArg(0));
 882                 docstring const ldelim = from_utf8(cmd.getArg(1));
 883                 docstring const rname  = from_utf8(cmd.getArg(2));
 884                 docstring const rdelim = from_utf8(cmd.getArg(3));
 885                 latexkeys const * l = in_word_set(lname);
 886                 bool const have_l = l && l->inset == "big" &&
 887                                     InsetMathBig::isBigInsetDelim(ldelim);
 888                 l = in_word_set(rname);
 889                 bool const have_r = l && l->inset == "big" &&
 890                                     InsetMathBig::isBigInsetDelim(rdelim);
 891                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 892                 // or right delimiter.
 893                 if (have_l || have_r) {
 894                         recordUndo(cur, Undo::ATOMIC);
 895                         docstring const selection = grabAndEraseSelection(cur);
 896                         selClearOrDel(cur);
 897                         if (have_l)
 898                                 cur.insert(MathAtom(new InsetMathBig(lname,
 899                                                                 ldelim)));
 900                         cur.niceInsert(selection);
 901                         if (have_r)
 902                                 cur.insert(MathAtom(new InsetMathBig(rname,
 903                                                                 rdelim)));
 904                 }
 905                 // Don't call cur.undispatched() if we did nothing, this would
 906                 // lead to infinite recursion via LyXText::dispatch().
 907                 break;
 908         }
 909
 910         case LFUN_SPACE_INSERT:
 911         case LFUN_MATH_SPACE:
 912                 recordUndo(cur, Undo::ATOMIC);
 913                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 914                 break;
 915
 916         case LFUN_ERT_INSERT:
 917                 // interpret this as if a backslash was typed
 918                 recordUndo(cur, Undo::ATOMIC);
 919                 interpretChar(cur, '\\');
 920                 break;
 921
 922         case LFUN_MATH_SUBSCRIPT:
 923                 // interpret this as if a _ was typed
 924                 recordUndo(cur, Undo::ATOMIC);
 925                 interpretChar(cur, '_');
 926                 break;
 927
 928         case LFUN_MATH_SUPERSCRIPT:
 929                 // interpret this as if a ^ was typed
 930                 recordUndo(cur, Undo::ATOMIC);
 931                 interpretChar(cur, '^');
 932                 break;
 933
 934 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 935 // handling such that "self-insert" works on "arbitrary stuff" too, and
 936 // math-insert only handles special math things like "matrix".
 937         case LFUN_MATH_INSERT: {
 938                 recordUndo(cur, Undo::ATOMIC);
 939                 if (cmd.argument() == "^" || cmd.argument() == "_") {
 940                         interpretChar(cur, cmd.argument()[0]);
 941                 } else
 942                         cur.niceInsert(cmd.argument());
 943                 break;
 944                 }
 945
 946         case LFUN_DIALOG_SHOW_NEW_INSET: {
 947                 docstring const & name = cmd.argument();
 948                 string data;
 949                 if (name == "ref") {
 950                         RefInset tmp(name);
 951                         data = tmp.createDialogStr(to_utf8(name));
 952                 }
 953                 cur.bv().showInsetDialog(to_utf8(name), data, 0);
 954                 break;
 955         }
 956
 957         case LFUN_INSET_INSERT: {
 958                 MathArray ar;
 959                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
 960                         recordUndo(cur);
 961                         cur.insert(ar);
 962                 } else
 963                         cur.undispatched();
 964                 break;
 965         }
 966
 967         default:
 968                 InsetMathDim::doDispatch(cur, cmd);
 969                 break;
 970         }
 971 }
 972
 973
 974 bool InsetMathNest::getStatus(LCursor & cur, FuncRequest const & cmd,
 975                 FuncStatus & flag) const
 976 {
 977         // the font related toggles
 978         //string tc = "mathnormal";
 979         bool ret = true;
 980         string const arg = to_utf8(cmd.argument());
 981         switch (cmd.action) {
 982         case LFUN_TABULAR_FEATURE:
 983                 flag.enabled(false);
 984                 break;
 985 #if 0
 986         case LFUN_TABULAR_FEATURE:
 987                 // FIXME: check temporarily disabled
 988                 // valign code
 989                 char align = mathcursor::valign();
 990                 if (align == '\0') {
 991                         enable = false;
 992                         break;
 993                 }
 994                 if (cmd.argument().empty()) {
 995                         flag.clear();
 996                         break;
 997                 }
 998                 if (!contains("tcb", cmd.argument()[0])) {
 999                         enable = false;
1000                         break;
1001                 }
1002                 flag.setOnOff(cmd.argument()[0] == align);
1003                 break;
1004 #endif
1005         /// We have to handle them since 1.4 blocks all unhandled actions
1006         case LFUN_FONT_ITAL:
1007         case LFUN_FONT_BOLD:
1008         case LFUN_FONT_SANS:
1009         case LFUN_FONT_EMPH:
1010         case LFUN_FONT_CODE:
1011         case LFUN_FONT_NOUN:
1012         case LFUN_FONT_ROMAN:
1013         case LFUN_FONT_DEFAULT:
1014                 flag.enabled(true);
1015                 break;
1016         case LFUN_MATH_MUTATE:
1017                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1018                 flag.setOnOff(false);
1019                 break;
1020
1021         // we just need to be in math mode to enable that
1022         case LFUN_MATH_SIZE:
1023         case LFUN_MATH_SPACE:
1024         case LFUN_MATH_LIMITS:
1025         case LFUN_MATH_NONUMBER:
1026         case LFUN_MATH_NUMBER:
1027         case LFUN_MATH_EXTERN:
1028                 flag.enabled(true);
1029                 break;
1030
1031         case LFUN_FONT_FRAK:
1032                 flag.enabled(currentMode() != TEXT_MODE);
1033                 break;
1034
1035         case LFUN_MATH_INSERT: {
1036                 bool const textarg =
1037                         arg == "\\textbf"   || arg == "\\textsf" ||
1038                         arg == "\\textrm"   || arg == "\\textmd" ||
1039                         arg == "\\textit"   || arg == "\\textsc" ||
1040                         arg == "\\textsl"   || arg == "\\textup" ||
1041                         arg == "\\texttt"   || arg == "\\textbb" ||
1042                         arg == "\\textnormal";
1043                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1044                 break;
1045         }
1046
1047         case LFUN_MATH_MATRIX:
1048                 flag.enabled(currentMode() == MATH_MODE);
1049                 break;
1050
1051         case LFUN_INSET_INSERT: {
1052                 // Don't test createMathInset_fromDialogStr(), since
1053                 // getStatus is not called with a valid reference and the
1054                 // dialog would not be applyable.
1055                 string const name = cmd.getArg(0);
1056                 flag.enabled(name == "ref");
1057                 break;
1058         }
1059
1060         case LFUN_MATH_DELIM:
1061         case LFUN_MATH_BIGDELIM:
1062                 // Don't do this with multi-cell selections
1063                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1064                 break;
1065
1066         default:
1067                 ret = false;
1068                 break;
1069         }
1070         return ret;
1071 }
1072
1073
1074 void InsetMathNest::edit(LCursor & cur, bool left)
1075 {
1076         cur.push(*this);
1077         cur.idx() = left ? 0 : cur.lastidx();
1078         cur.pos() = left ? 0 : cur.lastpos();
1079         cur.resetAnchor();
1080         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1081 }
1082
1083
1084 InsetBase * InsetMathNest::editXY(LCursor & cur, int x, int y)
1085 {
1086         int idx_min = 0;
1087         int dist_min = 1000000;
1088         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1089                 int const d = cell(i).dist(cur.bv(), x, y);
1090                 if (d < dist_min) {
1091                         dist_min = d;
1092                         idx_min = i;
1093                 }
1094         }
1095         MathArray & ar = cell(idx_min);
1096         cur.push(*this);
1097         cur.idx() = idx_min;
1098         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1099
1100         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1101         if (dist_min == 0) {
1102                 // hit inside cell
1103                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1104                         if (ar[i]->covers(cur.bv(), x, y))
1105                                 return ar[i].nucleus()->editXY(cur, x, y);
1106         }
1107         return this;
1108 }
1109
1110
1111 void InsetMathNest::lfunMousePress(LCursor & cur, FuncRequest & cmd)
1112 {
1113         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1114         BufferView & bv = cur.bv();
1115         if (cmd.button() == mouse_button::button1) {
1116                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1117                 bv.mouseSetCursor(cur);
1118         } else if (cmd.button() == mouse_button::button2) {
1119                 MathArray ar;
1120                 if (cur.selection())
1121                         asArray(bv.cursor().selectionAsString(false), ar);
1122                 else
1123                         asArray(theSelection().get(), ar);
1124
1125                 cur.insert(ar);
1126                 bv.mouseSetCursor(cur);
1127         }
1128 }
1129
1130
1131 void InsetMathNest::lfunMouseMotion(LCursor & cur, FuncRequest & cmd)
1132 {
1133         // only select with button 1
1134         if (cmd.button() == mouse_button::button1) {
1135                 LCursor & bvcur = cur.bv().cursor();
1136                 if (bvcur.anchor_.hasPart(cur)) {
1137                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1138                         bvcur.setCursor(cur);
1139                         bvcur.selection() = true;
1140                         //lyxerr << "MOTION " << bvcur << endl;
1141                 }
1142                 else {
1143                         cur.undispatched();
1144                 }
1145         }
1146 }
1147
1148
1149 void InsetMathNest::lfunMouseRelease(LCursor & cur, FuncRequest & cmd)
1150 {
1151         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1152
1153         if (cmd.button() == mouse_button::button1) {
1154                 //theSelection().put(cur.grabSelection());
1155                 return;
1156         }
1157
1158         if (cmd.button() == mouse_button::button3) {
1159                 // try to dispatch to enclosed insets first
1160                 cur.bv().showDialog("mathpanel");
1161                 return;
1162         }
1163
1164         cur.undispatched();
1165 }
1166
1167
1168 bool InsetMathNest::interpretChar(LCursor & cur, char_type c)
1169 {
1170         //lyxerr << "interpret 2: '" << c << "'" << endl;
1171         docstring save_selection;
1172         if (c == '^' || c == '_')
1173                 save_selection = grabAndEraseSelection(cur);
1174
1175         cur.clearTargetX();
1176
1177         // handle macroMode
1178         if (cur.inMacroMode()) {
1179                 docstring name = cur.macroName();
1180
1181                 /// are we currently typing '#1' or '#2' or...?
1182                 if (name == "\\#") {
1183                         cur.backspace();
1184                         int n = c - '0';
1185                         if (n >= 1 && n <= 9)
1186                                 cur.insert(new MathMacroArgument(n));
1187                         return true;
1188                 }
1189
1190                 if (isalpha(c)) {
1191                         cur.activeMacro()->setName(name + docstring(1, c));
1192                         return true;
1193                 }
1194
1195                 // handle 'special char' macros
1196                 if (name == "\\") {
1197                         // remove the '\\'
1198                         if (c == '\\') {
1199                                 cur.backspace();
1200                                 if (currentMode() == InsetMath::TEXT_MODE)
1201                                         cur.niceInsert(createInsetMath("textbackslash"));
1202                                 else
1203                                         cur.niceInsert(createInsetMath("backslash"));
1204                         } else if (c == '{') {
1205                                 cur.backspace();
1206                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1207                         } else if (c == '%') {
1208                                 cur.backspace();
1209                                 cur.niceInsert(MathAtom(new InsetMathComment));
1210                         } else if (c == '#') {
1211                                 BOOST_ASSERT(cur.activeMacro());
1212                                 cur.activeMacro()->setName(name + docstring(1, c));
1213                         } else {
1214                                 cur.backspace();
1215                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1216                         }
1217                         return true;
1218                 }
1219
1220                 // One character big delimiters. The others are handled in
1221                 // interpretString().
1222                 latexkeys const * l = in_word_set(name.substr(1));
1223                 if (name[0] == '\\' && l && l->inset == "big") {
1224                         docstring delim;
1225                         switch (c) {
1226                         case '{':
1227                                 delim = from_ascii("\\{");
1228                                 break;
1229                         case '}':
1230                                 delim = from_ascii("\\}");
1231                                 break;
1232                         default:
1233                                 delim = docstring(1, c);
1234                                 break;
1235                         }
1236                         if (InsetMathBig::isBigInsetDelim(delim)) {
1237                                 // name + delim ared a valid InsetMathBig.
1238                                 // We can't use cur.macroModeClose() because
1239                                 // it does not handle delim.
1240                                 InsetMathUnknown * p = cur.activeMacro();
1241                                 p->finalize();
1242                                 --cur.pos();
1243                                 cur.cell().erase(cur.pos());
1244                                 cur.plainInsert(MathAtom(
1245                                         new InsetMathBig(name.substr(1), delim)));
1246                                 return true;
1247                         }
1248                 }
1249
1250                 // leave macro mode and try again if necessary
1251                 cur.macroModeClose();
1252                 if (c == '{')
1253                         cur.niceInsert(MathAtom(new InsetMathBrace));
1254                 else if (c != ' ')
1255                         interpretChar(cur, c);
1256                 return true;
1257         }
1258
1259         // This is annoying as one has to press <space> far too often.
1260         // Disable it.
1261
1262 #if 0
1263                 // leave autocorrect mode if necessary
1264                 if (autocorrect() && c == ' ') {
1265                         autocorrect() = false;
1266                         return true;
1267                 }
1268 #endif
1269
1270         // just clear selection on pressing the space bar
1271         if (cur.selection() && c == ' ') {
1272                 cur.selection() = false;
1273                 return true;
1274         }
1275
1276         selClearOrDel(cur);
1277
1278         if (c == '\\') {
1279                 //lyxerr << "starting with macro" << endl;
1280                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1281                 return true;
1282         }
1283
1284         if (c == '\n') {
1285                 if (currentMode() == InsetMath::TEXT_MODE)
1286                         cur.insert(c);
1287                 return true;
1288         }
1289
1290         if (c == ' ') {
1291                 if (currentMode() == InsetMath::TEXT_MODE) {
1292                         // insert spaces in text mode,
1293                         // but suppress direct insertion of two spaces in a row
1294                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1295                         // it is better than nothing...
1296                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ')
1297                                 cur.insert(c);
1298                         return true;
1299                 }
1300                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1301                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1302                         return true;
1303                 }
1304                 if (cur.popRight())
1305                         return true;
1306                 // if are at the very end, leave the formula
1307                 return cur.pos() != cur.lastpos();
1308         }
1309
1310         // These shouldn't work in text mode:
1311         if (currentMode() != InsetMath::TEXT_MODE) {
1312                 if (c == '_') {
1313                         script(cur, false, save_selection);
1314                         return true;
1315                 }
1316                 if (c == '^') {
1317                         script(cur, true, save_selection);
1318                         return true;
1319                 }
1320                 if (c == '~') {
1321                         cur.niceInsert(createInsetMath("sim"));
1322                         return true;
1323                 }
1324         }
1325
1326         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1327             c == '%' || c == '_' || c == '^') {
1328                 cur.niceInsert(createInsetMath(docstring(1, c)));
1329                 return true;
1330         }
1331
1332
1333         // try auto-correction
1334         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1335         //      return true;
1336
1337         // no special circumstances, so insert the character without any fuss
1338         cur.insert(c);
1339         cur.autocorrect() = true;
1340         return true;
1341 }
1342
1343
1344 bool InsetMathNest::interpretString(LCursor & cur, docstring const & str)
1345 {
1346         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1347         // possible
1348         if (!cur.empty() && cur.pos() > 0 &&
1349             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1350                 if (InsetMathBig::isBigInsetDelim(str)) {
1351                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1352                         if (prev[0] == '\\') {
1353                                 prev = prev.substr(1);
1354                                 latexkeys const * l = in_word_set(prev);
1355                                 if (l && l->inset == "big") {
1356                                         cur.cell()[cur.pos() - 1] =
1357                                                 MathAtom(new InsetMathBig(prev, str));
1358                                         return true;
1359                                 }
1360                         }
1361                 }
1362         }
1363         return false;
1364 }
1365
1366
1367 bool InsetMathNest::script(LCursor & cur, bool up,
1368                 docstring const & save_selection)
1369 {
1370         // Hack to get \^ and \_ working
1371         //lyxerr << "handling script: up: " << up << endl;
1372         if (cur.inMacroMode() && cur.macroName() == "\\") {
1373                 if (up)
1374                         cur.niceInsert(createInsetMath("mathcircumflex"));
1375                 else
1376                         interpretChar(cur, '_');
1377                 return true;
1378         }
1379
1380         cur.macroModeClose();
1381         if (asScriptInset() && cur.idx() == 0) {
1382                 // we are in a nucleus of a script inset, move to _our_ script
1383                 InsetMathScript * inset = asScriptInset();
1384                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1385                 inset->ensure(up);
1386                 cur.idx() = inset->idxOfScript(up);
1387                 cur.pos() = 0;
1388         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1389                 --cur.pos();
1390                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1391                 cur.push(*inset);
1392                 inset->ensure(up);
1393                 cur.idx() = inset->idxOfScript(up);
1394                 cur.pos() = cur.lastpos();
1395         } else {
1396                 // convert the thing to our left to a scriptinset or create a new
1397                 // one if in the very first position of the array
1398                 if (cur.pos() == 0) {
1399                         //lyxerr << "new scriptinset" << endl;
1400                         cur.insert(new InsetMathScript(up));
1401                 } else {
1402                         //lyxerr << "converting prev atom " << endl;
1403                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1404                 }
1405                 --cur.pos();
1406                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1407                 // special handling of {}-bases
1408                 // is this always correct?
1409                 if (inset->nuc().size() == 1
1410                     && inset->nuc().back()->asBraceInset())
1411                         inset->nuc() = inset->nuc().back()->asNestInset()->cell(0);
1412
1413                 cur.push(*inset);
1414                 cur.idx() = 1;
1415                 cur.pos() = 0;
1416         }
1417         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1418         cur.niceInsert(save_selection);
1419         cur.resetAnchor();
1420         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1421         return true;
1422 }
1423
1424
1425 } // namespace lyx