src/mathed/InsetMathNest.C

   1 /**
   2  * \file InsetMathNest.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author André Pönitz
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "InsetMathNest.h"
  14
  15 #include "InsetMathArray.h"
  16 #include "InsetMathBig.h"
  17 #include "InsetMathBox.h"
  18 #include "InsetMathBrace.h"
  19 #include "InsetMathColor.h"
  20 #include "InsetMathComment.h"
  21 #include "MathData.h"
  22 #include "InsetMathDelim.h"
  23 #include "MathFactory.h"
  24 #include "InsetMathHull.h"
  25 #include "MathStream.h"
  26 #include "MathMacroArgument.h"
  27 //#include "InsetMathMBox.h"
  28 #include "MathParser.h"
  29 #include "InsetMathScript.h"
  30 #include "InsetMathSpace.h"
  31 #include "InsetMathSymbol.h"
  32 #include "MathSupport.h"
  33 #include "InsetMathUnknown.h"
  34 #include "InsetMathRef.h"
  35
  36 #include "BufferView.h"
  37 #include "CutAndPaste.h"
  38 #include "FuncStatus.h"
  39 #include "LColor.h"
  40 #include "bufferview_funcs.h"
  41 #include "coordcache.h"
  42 #include "cursor.h"
  43 #include "debug.h"
  44 #include "dispatchresult.h"
  45 #include "funcrequest.h"
  46 #include "gettext.h"
  47 #include "lyxtext.h"
  48 #include "outputparams.h"
  49 #include "undo.h"
  50
  51 #include "support/lstrings.h"
  52
  53 #include "frontends/Painter.h"
  54 #include "frontends/Selection.h"
  55
  56 #include "funcrequest.h"
  57 #include "lyxserver.h"
  58 #include "lyxsocket.h"
  59
  60 #include <sstream>
  61
  62
  63 namespace lyx {
  64
  65 using cap::copySelection;
  66 using cap::grabAndEraseSelection;
  67 using cap::cutSelection;
  68 using cap::replaceSelection;
  69 using cap::selClearOrDel;
  70
  71 using std::endl;
  72 using std::string;
  73 using std::istringstream;
  74
  75
  76 InsetMathNest::InsetMathNest(idx_type nargs)
  77         : cells_(nargs), lock_(false)
  78 {}
  79
  80
  81 InsetMath::idx_type InsetMathNest::nargs() const
  82 {
  83         return cells_.size();
  84 }
  85
  86
  87 MathArray & InsetMathNest::cell(idx_type i)
  88 {
  89         return cells_[i];
  90 }
  91
  92
  93 MathArray const & InsetMathNest::cell(idx_type i) const
  94 {
  95         return cells_[i];
  96 }
  97
  98
  99 void InsetMathNest::cursorPos(BufferView const & bv,
 100                 CursorSlice const & sl, bool /*boundary*/,
 101                 int & x, int & y) const
 102 {
 103 // FIXME: This is a hack. Ideally, the coord cache should not store
 104 // absolute positions, but relative ones. This would mean to call
 105 // setXY() not in MathArray::draw(), but in the parent insets' draw()
 106 // with the correctly adjusted x,y values. But this means that we'd have
 107 // to touch all (math)inset's draw() methods. Right now, we'll store
 108 // absolute value, and make them here relative, only to make them
 109 // absolute again when actually drawing the cursor. What a mess.
 110         BOOST_ASSERT(ptr_cmp(&sl.inset(), this));
 111         MathArray const & ar = sl.cell();
 112         CoordCache const & coord_cache = bv.coordCache();
 113         if (!coord_cache.getArrays().has(&ar)) {
 114                 // this can (semi-)legally happen if we just created this cell
 115                 // and it never has been drawn before. So don't ASSERT.
 116                 //lyxerr << "no cached data for array " << &ar << endl;
 117                 x = 0;
 118                 y = 0;
 119                 return;
 120         }
 121         Point const pt = coord_cache.getArrays().xy(&ar);
 122         if (!coord_cache.getInsets().has(this)) {
 123                 // same as above
 124                 //lyxerr << "no cached data for inset " << this << endl;
 125                 x = 0;
 126                 y = 0;
 127                 return;
 128         }
 129         Point const pt2 = coord_cache.getInsets().xy(this);
 130         //lyxerr << "retrieving position cache for MathArray "
 131         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 132         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 133         y = pt.y_ - pt2.y_;
 134 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 135 //              << " asc: " << ascent() << "  des: " << descent()
 136 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 137         // move cursor visually into empty cells ("blue rectangles");
 138         if (ar.empty())
 139                 x += 2;
 140 }
 141
 142
 143 void InsetMathNest::metrics(MetricsInfo const & mi) const
 144 {
 145         MetricsInfo m = mi;
 146         for (idx_type i = 0, n = nargs(); i != n; ++i)
 147                 cell(i).metrics(m);
 148 }
 149
 150
 151 bool InsetMathNest::idxNext(LCursor & cur) const
 152 {
 153         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 154         if (cur.idx() == cur.lastidx())
 155                 return false;
 156         ++cur.idx();
 157         cur.pos() = 0;
 158         return true;
 159 }
 160
 161
 162 bool InsetMathNest::idxRight(LCursor & cur) const
 163 {
 164         return idxNext(cur);
 165 }
 166
 167
 168 bool InsetMathNest::idxPrev(LCursor & cur) const
 169 {
 170         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 171         if (cur.idx() == 0)
 172                 return false;
 173         --cur.idx();
 174         cur.pos() = cur.lastpos();
 175         return true;
 176 }
 177
 178
 179 bool InsetMathNest::idxLeft(LCursor & cur) const
 180 {
 181         return idxPrev(cur);
 182 }
 183
 184
 185 bool InsetMathNest::idxFirst(LCursor & cur) const
 186 {
 187         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 188         if (nargs() == 0)
 189                 return false;
 190         cur.idx() = 0;
 191         cur.pos() = 0;
 192         return true;
 193 }
 194
 195
 196 bool InsetMathNest::idxLast(LCursor & cur) const
 197 {
 198         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 199         if (nargs() == 0)
 200                 return false;
 201         cur.idx() = cur.lastidx();
 202         cur.pos() = cur.lastpos();
 203         return true;
 204 }
 205
 206
 207 void InsetMathNest::dump() const
 208 {
 209         odocstringstream oss;
 210         WriteStream os(oss);
 211         os << "---------------------------------------------\n";
 212         write(os);
 213         os << "\n";
 214         for (idx_type i = 0, n = nargs(); i != n; ++i)
 215                 os << cell(i) << "\n";
 216         os << "---------------------------------------------\n";
 217         lyxerr << to_utf8(oss.str());
 218 }
 219
 220
 221 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 222 {
 223 #if 0
 224         if (lock_)
 225                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 226                                         LColor::mathlockbg);
 227 #endif
 228         setPosCache(pi, x, y);
 229 }
 230
 231
 232 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 233 {
 234         BufferView & bv = *pi.base.bv;
 235         // this should use the x/y values given, not the cached values
 236         LCursor & cur = bv.cursor();
 237         if (!cur.selection())
 238                 return;
 239         if (!ptr_cmp(&cur.inset(), this))
 240                 return;
 241
 242         // FIXME: hack to get position cache warm
 243         pi.pain.setDrawingEnabled(false);
 244         draw(pi, x, y);
 245         pi.pain.setDrawingEnabled(true);
 246
 247         CursorSlice s1 = cur.selBegin();
 248         CursorSlice s2 = cur.selEnd();
 249
 250         //lyxerr << "InsetMathNest::drawing selection: "
 251         //      << " s1: " << s1 << " s2: " << s2 << endl;
 252         if (s1.idx() == s2.idx()) {
 253                 MathArray const & c = cell(s1.idx());
 254                 int x1 = c.xo(bv) + c.pos2x(s1.pos());
 255                 int y1 = c.yo(bv) - c.ascent();
 256                 int x2 = c.xo(bv) + c.pos2x(s2.pos());
 257                 int y2 = c.yo(bv) + c.descent();
 258                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 259         //lyxerr << "InsetMathNest::drawing selection 3: "
 260         //      << " x1: " << x1 << " x2: " << x2
 261         //      << " y1: " << y1 << " y2: " << y2 << endl;
 262         } else {
 263                 for (idx_type i = 0; i < nargs(); ++i) {
 264                         if (idxBetween(i, s1.idx(), s2.idx())) {
 265                                 MathArray const & c = cell(i);
 266                                 int x1 = c.xo(bv);
 267                                 int y1 = c.yo(bv) - c.ascent();
 268                                 int x2 = c.xo(bv) + c.width();
 269                                 int y2 = c.yo(bv) + c.descent();
 270                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
 271                         }
 272                 }
 273         }
 274 }
 275
 276
 277 void InsetMathNest::validate(LaTeXFeatures & features) const
 278 {
 279         for (idx_type i = 0; i < nargs(); ++i)
 280                 cell(i).validate(features);
 281 }
 282
 283
 284 void InsetMathNest::replace(ReplaceData & rep)
 285 {
 286         for (idx_type i = 0; i < nargs(); ++i)
 287                 cell(i).replace(rep);
 288 }
 289
 290
 291 bool InsetMathNest::contains(MathArray const & ar) const
 292 {
 293         for (idx_type i = 0; i < nargs(); ++i)
 294                 if (cell(i).contains(ar))
 295                         return true;
 296         return false;
 297 }
 298
 299
 300 bool InsetMathNest::lock() const
 301 {
 302         return lock_;
 303 }
 304
 305
 306 void InsetMathNest::lock(bool l)
 307 {
 308         lock_ = l;
 309 }
 310
 311
 312 bool InsetMathNest::isActive() const
 313 {
 314         return nargs() > 0;
 315 }
 316
 317
 318 MathArray InsetMathNest::glue() const
 319 {
 320         MathArray ar;
 321         for (size_t i = 0; i < nargs(); ++i)
 322                 ar.append(cell(i));
 323         return ar;
 324 }
 325
 326
 327 void InsetMathNest::write(WriteStream & os) const
 328 {
 329         os << '\\' << name().c_str();
 330         for (size_t i = 0; i < nargs(); ++i)
 331                 os << '{' << cell(i) << '}';
 332         if (nargs() == 0)
 333                 os.pendingSpace(true);
 334         if (lock_ && !os.latex()) {
 335                 os << "\\lyxlock";
 336                 os.pendingSpace(true);
 337         }
 338 }
 339
 340
 341 void InsetMathNest::normalize(NormalStream & os) const
 342 {
 343         os << '[' << name().c_str();
 344         for (size_t i = 0; i < nargs(); ++i)
 345                 os << ' ' << cell(i);
 346         os << ']';
 347 }
 348
 349
 350 int InsetMathNest::latex(Buffer const &, odocstream & os,
 351                         OutputParams const & runparams) const
 352 {
 353         WriteStream wi(os, runparams.moving_arg, true);
 354         write(wi);
 355         return wi.line();
 356 }
 357
 358
 359 bool InsetMathNest::notifyCursorLeaves(LCursor & /*cur*/)
 360 {
 361 #ifdef WITH_WARNINGS
 362 #warning look here
 363 #endif
 364 #if 0
 365         MathArray & ar = cur.cell();
 366         // remove base-only "scripts"
 367         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 368                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 369                 if (p && p->nargs() == 1) {
 370                         MathArray ar = p->nuc();
 371                         erase(i);
 372                         insert(i, ar);
 373                         cur.adjust(i, ar.size() - 1);
 374                 }
 375         }
 376
 377         // glue adjacent font insets of the same kind
 378         for (pos_type i = 0; i + 1 < size(); ++i) {
 379                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 380                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 381                 if (p && q && p->name() == q->name()) {
 382                         p->cell(0).append(q->cell(0));
 383                         erase(i + 1);
 384                         cur.adjust(i, -1);
 385                 }
 386         }
 387 #endif
 388         return false;
 389 }
 390
 391
 392 void InsetMathNest::handleFont
 393         (LCursor & cur, docstring const & arg, char const * const font)
 394 {
 395         handleFont(cur, arg, from_ascii(font));
 396 }
 397
 398
 399 void InsetMathNest::handleFont
 400         (LCursor & cur, docstring const & arg, docstring const & font)
 401 {
 402         // this whole function is a hack and won't work for incremental font
 403         // changes...
 404         recordUndo(cur, Undo::ATOMIC);
 405
 406         if (cur.inset().asInsetMath()->name() == font)
 407                 cur.handleFont(to_utf8(font));
 408         else {
 409                 cur.handleNest(createInsetMath(font));
 410                 cur.insert(arg);
 411         }
 412 }
 413
 414
 415 void InsetMathNest::handleFont2(LCursor & cur, docstring const & arg)
 416 {
 417         recordUndo(cur, Undo::ATOMIC);
 418         LyXFont font;
 419         bool b;
 420         bv_funcs::string2font(to_utf8(arg), font, b);
 421         if (font.color() != LColor::inherit) {
 422                 MathAtom at = MathAtom(new InsetMathColor(true, font.color()));
 423                 cur.handleNest(at, 0);
 424         }
 425 }
 426
 427
 428 void InsetMathNest::doDispatch(LCursor & cur, FuncRequest & cmd)
 429 {
 430         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 431         //CursorSlice sl = cur.current();
 432
 433         switch (cmd.action) {
 434
 435         case LFUN_PASTE: {
 436                 recordUndo(cur);
 437                 cur.message(_("Paste"));
 438                 replaceSelection(cur);
 439                 size_t n = 0;
 440                 istringstream is(to_utf8(cmd.argument()));
 441                 is >> n;
 442                 docstring const selection = cap::getSelection(cur.buffer(), n);
 443                 cur.niceInsert(selection);
 444                 cur.clearSelection(); // bug 393
 445                 cur.bv().switchKeyMap();
 446                 finishUndo();
 447                 break;
 448         }
 449
 450         case LFUN_CUT:
 451                 recordUndo(cur);
 452                 cutSelection(cur, true, true);
 453                 cur.message(_("Cut"));
 454                 // Prevent stale position >= size crash
 455                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 456                 cur.normalize();
 457                 break;
 458
 459         case LFUN_COPY:
 460                 copySelection(cur);
 461                 // FIXME UNICODE
 462                 cur.message(_("Copy"));
 463                 break;
 464
 465         case LFUN_MOUSE_PRESS:
 466                 lfunMousePress(cur, cmd);
 467                 break;
 468
 469         case LFUN_MOUSE_MOTION:
 470                 lfunMouseMotion(cur, cmd);
 471                 break;
 472
 473         case LFUN_MOUSE_RELEASE:
 474                 lfunMouseRelease(cur, cmd);
 475                 break;
 476
 477         case LFUN_FINISHED_LEFT:
 478                 cur.bv().cursor() = cur;
 479                 break;
 480
 481         case LFUN_FINISHED_RIGHT:
 482                 ++cur.pos();
 483                 cur.bv().cursor() = cur;
 484                 break;
 485
 486         case LFUN_FINISHED_UP:
 487                 cur.bv().cursor() = cur;
 488                 break;
 489
 490         case LFUN_FINISHED_DOWN:
 491                 ++cur.pos();
 492                 cur.bv().cursor() = cur;
 493                 break;
 494
 495         case LFUN_CHAR_FORWARD:
 496                 cur.updateFlags(Update::FitCursor);
 497         case LFUN_CHAR_FORWARD_SELECT:
 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:
 515                 cur.updateFlags(Update::FitCursor);
 516         case LFUN_CHAR_BACKWARD_SELECT:
 517                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 518                 cur.autocorrect() = false;
 519                 cur.clearTargetX();
 520                 cur.macroModeClose();
 521                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 522                         cur.posLeft();
 523                         cur.push(*cur.nextAtom().nucleus());
 524                         cur.inset().idxLast(cur);
 525                 } else if (cur.posLeft() || idxLeft(cur)
 526                         || cur.popLeft() || cur.selection())
 527                         ;
 528                 else {
 529                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 530                         cur.undispatched();
 531                 }
 532                 break;
 533
 534         case LFUN_UP:
 535                 cur.updateFlags(Update::FitCursor);
 536         case LFUN_UP_SELECT:
 537                 // FIXME Tried to use clearTargetX and macroModeClose, crashed on cur.up()
 538                 if (cur.inMacroMode()) {
 539                         // Make Helge happy
 540                         cur.macroModeClose();
 541                         break;
 542                 }
 543                 cur.selHandle(cmd.action == LFUN_UP_SELECT);
 544                 if (!cur.up()) {
 545                         cmd = FuncRequest(LFUN_FINISHED_UP);
 546                         cur.undispatched();
 547                 }
 548                 // fixes bug 1598. Please check!
 549                 cur.normalize();
 550                 break;
 551
 552         case LFUN_DOWN:
 553                 cur.updateFlags(Update::FitCursor);
 554         case LFUN_DOWN_SELECT:
 555                 if (cur.inMacroMode()) {
 556                         cur.macroModeClose();
 557                         break;
 558                 }
 559                 cur.selHandle(cmd.action == LFUN_DOWN_SELECT);
 560                 if (!cur.down()) {
 561                         cmd = FuncRequest(LFUN_FINISHED_DOWN);
 562                         cur.undispatched();
 563                 }
 564                 // fixes bug 1598. Please check!
 565                 cur.normalize();
 566                 break;
 567
 568         case LFUN_MOUSE_DOUBLE:
 569         case LFUN_MOUSE_TRIPLE:
 570         case LFUN_WORD_SELECT:
 571                 cur.pos() = 0;
 572                 cur.idx() = 0;
 573                 cur.resetAnchor();
 574                 cur.selection() = true;
 575                 cur.pos() = cur.lastpos();
 576                 cur.idx() = cur.lastidx();
 577                 break;
 578
 579         case LFUN_PARAGRAPH_UP:
 580         case LFUN_PARAGRAPH_DOWN:
 581                 cur.updateFlags(Update::FitCursor);
 582         case LFUN_PARAGRAPH_UP_SELECT:
 583         case LFUN_PARAGRAPH_DOWN_SELECT:
 584                 break;
 585
 586         case LFUN_LINE_BEGIN:
 587         case LFUN_WORD_BACKWARD:
 588                 cur.updateFlags(Update::FitCursor);
 589         case LFUN_LINE_BEGIN_SELECT:
 590         case LFUN_WORD_BACKWARD_SELECT:
 591                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 592                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 593                 cur.macroModeClose();
 594                 if (cur.pos() != 0) {
 595                         cur.pos() = 0;
 596                 } else if (cur.col() != 0) {
 597                         cur.idx() -= cur.col();
 598                         cur.pos() = 0;
 599                 } else if (cur.idx() != 0) {
 600                         cur.idx() = 0;
 601                         cur.pos() = 0;
 602                 } else {
 603                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 604                         cur.undispatched();
 605                 }
 606                 break;
 607
 608         case LFUN_WORD_FORWARD:
 609         case LFUN_LINE_END:
 610                 cur.updateFlags(Update::FitCursor);
 611         case LFUN_WORD_FORWARD_SELECT:
 612         case LFUN_LINE_END_SELECT:
 613                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 614                                 cmd.action == LFUN_LINE_END_SELECT);
 615                 cur.macroModeClose();
 616                 cur.clearTargetX();
 617                 if (cur.pos() != cur.lastpos()) {
 618                         cur.pos() = cur.lastpos();
 619                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 620                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 621                         cur.pos() = cur.lastpos();
 622                 } else if (cur.idx() != cur.lastidx()) {
 623                         cur.idx() = cur.lastidx();
 624                         cur.pos() = cur.lastpos();
 625                 } else {
 626                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 627                         cur.undispatched();
 628                 }
 629                 break;
 630
 631         case LFUN_SCREEN_UP_SELECT:
 632         case LFUN_SCREEN_UP:
 633                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 634                 cur.undispatched();
 635                 break;
 636
 637         case LFUN_SCREEN_DOWN_SELECT:
 638         case LFUN_SCREEN_DOWN:
 639                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 640                 cur.undispatched();
 641                 break;
 642
 643         case LFUN_CELL_FORWARD:
 644                 cur.updateFlags(Update::FitCursor);
 645                 cur.inset().idxNext(cur);
 646                 break;
 647
 648         case LFUN_CELL_BACKWARD:
 649                 cur.updateFlags(Update::FitCursor);
 650                 cur.inset().idxPrev(cur);
 651                 break;
 652
 653         case LFUN_WORD_DELETE_BACKWARD:
 654         case LFUN_CHAR_DELETE_BACKWARD:
 655                 if (cur.pos() == 0)
 656                         // May affect external cell:
 657                         recordUndoInset(cur, Undo::ATOMIC);
 658                 else
 659                         recordUndo(cur, Undo::ATOMIC);
 660                 // if the inset can not be removed from within, delete it
 661                 if (!cur.backspace()) {
 662                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 663                         cur.bv().getLyXText()->dispatch(cur, cmd);
 664                 }
 665                 break;
 666
 667         case LFUN_WORD_DELETE_FORWARD:
 668         case LFUN_CHAR_DELETE_FORWARD:
 669                 if (cur.pos() == cur.lastpos())
 670                         // May affect external cell:
 671                         recordUndoInset(cur, Undo::ATOMIC);
 672                 else
 673                         recordUndo(cur, Undo::ATOMIC);
 674                 // if the inset can not be removed from within, delete it
 675                 if (!cur.erase()) {
 676                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 677                         cur.bv().getLyXText()->dispatch(cur, cmd);
 678                 }
 679                 break;
 680
 681         case LFUN_ESCAPE:
 682                 if (cur.selection())
 683                         cur.clearSelection();
 684                 else  {
 685                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 686                         cur.undispatched();
 687                 }
 688                 break;
 689
 690         case LFUN_INSET_TOGGLE:
 691                 recordUndo(cur);
 692                 lock(!lock());
 693                 cur.popRight();
 694                 break;
 695
 696         case LFUN_SELF_INSERT:
 697                 if (cmd.argument().size() != 1) {
 698                         recordUndo(cur);
 699                         docstring const arg = cmd.argument();
 700                         if (!interpretString(cur, arg))
 701                                 cur.insert(arg);
 702                         break;
 703                 }
 704                 // Don't record undo steps if we are in macro mode and
 705                 // cmd.argument is the next character of the macro name.
 706                 // Otherwise we'll get an invalid cursor if we undo after
 707                 // the macro was finished and the macro is a known command,
 708                 // e.g. sqrt. LCursor::macroModeClose replaces in this case
 709                 // the InsetMathUnknown with name "frac" by an empty
 710                 // InsetMathFrac -> a pos value > 0 is invalid.
 711                 // A side effect is that an undo before the macro is finished
 712                 // undoes the complete macro, not only the last character.
 713                 if (!cur.inMacroMode())
 714                         recordUndo(cur);
 715
 716                 // spacial handling of space. If we insert an inset
 717                 // via macro mode, we want to put the cursor inside it
 718                 // if relevant. Think typing "\frac<space>".
 719                 if (cmd.argument()[0] == ' '
 720                     && cur.inMacroMode() && cur.macroName() != "\\"
 721                     && cur.macroModeClose()) {
 722                         MathAtom const atom = cur.prevAtom();
 723                         if (atom->asNestInset() && atom->nargs() > 0) {
 724                                 cur.posLeft();
 725                                 cur.pushLeft(*cur.nextInset());
 726                         }
 727                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 728                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 729                         cur.undispatched();
 730                 }
 731                 break;
 732
 733         //case LFUN_SERVER_GET_XY:
 734         //      sprintf(dispatch_buffer, "%d %d",);
 735         //      break;
 736
 737         case LFUN_SERVER_SET_XY: {
 738                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 739                 int x = 0;
 740                 int y = 0;
 741                 istringstream is(to_utf8(cmd.argument()));
 742                 is >> x >> y;
 743                 cur.setScreenPos(x, y);
 744                 break;
 745         }
 746
 747         // Special casing for superscript in case of LyX handling
 748         // dead-keys:
 749         case LFUN_ACCENT_CIRCUMFLEX:
 750                 if (cmd.argument().empty()) {
 751                         // do superscript if LyX handles
 752                         // deadkeys
 753                         recordUndo(cur, Undo::ATOMIC);
 754                         script(cur, true, grabAndEraseSelection(cur));
 755                 }
 756                 break;
 757
 758         case LFUN_ACCENT_UMLAUT:
 759         case LFUN_ACCENT_ACUTE:
 760         case LFUN_ACCENT_GRAVE:
 761         case LFUN_ACCENT_BREVE:
 762         case LFUN_ACCENT_DOT:
 763         case LFUN_ACCENT_MACRON:
 764         case LFUN_ACCENT_CARON:
 765         case LFUN_ACCENT_TILDE:
 766         case LFUN_ACCENT_CEDILLA:
 767         case LFUN_ACCENT_CIRCLE:
 768         case LFUN_ACCENT_UNDERDOT:
 769         case LFUN_ACCENT_TIE:
 770         case LFUN_ACCENT_OGONEK:
 771         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 772                 break;
 773
 774         //  Math fonts
 775         case LFUN_FONT_FREE_APPLY:
 776         case LFUN_FONT_FREE_UPDATE:
 777                 handleFont2(cur, cmd.argument());
 778                 break;
 779
 780         case LFUN_FONT_BOLD:
 781                 if (currentMode() == TEXT_MODE)
 782                         handleFont(cur, cmd.argument(), "textbf");
 783                 else
 784                         handleFont(cur, cmd.argument(), "mathbf");
 785                 break;
 786         case LFUN_FONT_SANS:
 787                 if (currentMode() == TEXT_MODE)
 788                         handleFont(cur, cmd.argument(), "textsf");
 789                 else
 790                         handleFont(cur, cmd.argument(), "mathsf");
 791                 break;
 792         case LFUN_FONT_EMPH:
 793                 if (currentMode() == TEXT_MODE)
 794                         handleFont(cur, cmd.argument(), "emph");
 795                 else
 796                         handleFont(cur, cmd.argument(), "mathcal");
 797                 break;
 798         case LFUN_FONT_ROMAN:
 799                 if (currentMode() == TEXT_MODE)
 800                         handleFont(cur, cmd.argument(), "textrm");
 801                 else
 802                         handleFont(cur, cmd.argument(), "mathrm");
 803                 break;
 804         case LFUN_FONT_CODE:
 805                 if (currentMode() == TEXT_MODE)
 806                         handleFont(cur, cmd.argument(), "texttt");
 807                 else
 808                         handleFont(cur, cmd.argument(), "mathtt");
 809                 break;
 810         case LFUN_FONT_FRAK:
 811                 handleFont(cur, cmd.argument(), "mathfrak");
 812                 break;
 813         case LFUN_FONT_ITAL:
 814                 if (currentMode() == TEXT_MODE)
 815                         handleFont(cur, cmd.argument(), "textit");
 816                 else
 817                         handleFont(cur, cmd.argument(), "mathit");
 818                 break;
 819         case LFUN_FONT_NOUN:
 820                 if (currentMode() == TEXT_MODE)
 821                         // FIXME: should be "noun"
 822                         handleFont(cur, cmd.argument(), "textsc");
 823                 else
 824                         handleFont(cur, cmd.argument(), "mathbb");
 825                 break;
 826         //case LFUN_FONT_FREE_APPLY:
 827                 handleFont(cur, cmd.argument(), "textrm");
 828                 break;
 829         case LFUN_FONT_DEFAULT:
 830                 handleFont(cur, cmd.argument(), "textnormal");
 831                 break;
 832
 833         case LFUN_MATH_MODE: {
 834 #if 1
 835                 // ignore math-mode on when already in math mode
 836                 if (currentMode() == InsetBase::MATH_MODE && cmd.argument() == "on")
 837                         break;
 838                 cur.macroModeClose();
 839                 docstring const save_selection = grabAndEraseSelection(cur);
 840                 selClearOrDel(cur);
 841                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 842                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 843                 cur.posLeft();
 844                 cur.pushLeft(*cur.nextInset());
 845                 cur.niceInsert(save_selection);
 846 #else
 847                 if (currentMode() == InsetBase::TEXT_MODE) {
 848                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 849                         cur.message(_("create new math text environment ($...$)"));
 850                 } else {
 851                         handleFont(cur, cmd.argument(), "textrm");
 852                         cur.message(_("entered math text mode (textrm)"));
 853                 }
 854 #endif
 855                 break;
 856         }
 857
 858         case LFUN_MATH_SIZE:
 859 #if 0
 860                 recordUndo(cur);
 861                 cur.setSize(arg);
 862 #endif
 863                 break;
 864
 865         case LFUN_MATH_MATRIX: {
 866                 recordUndo(cur, Undo::ATOMIC);
 867                 unsigned int m = 1;
 868                 unsigned int n = 1;
 869                 docstring v_align;
 870                 docstring h_align;
 871                 idocstringstream is(cmd.argument());
 872                 is >> m >> n >> v_align >> h_align;
 873                 if (m < 1)
 874                         m = 1;
 875                 if (n < 1)
 876                         n = 1;
 877                 v_align += 'c';
 878                 cur.niceInsert(
 879                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 880                 break;
 881         }
 882
 883         case LFUN_MATH_DELIM: {
 884                 docstring ls;
 885                 docstring rs = support::split(cmd.argument(), ls, ' ');
 886                 // Reasonable default values
 887                 if (ls.empty())
 888                         ls = '(';
 889                 if (rs.empty())
 890                         rs = ')';
 891                 recordUndo(cur, Undo::ATOMIC);
 892                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 893                 break;
 894         }
 895
 896         case LFUN_MATH_BIGDELIM: {
 897                 docstring const lname  = from_utf8(cmd.getArg(0));
 898                 docstring const ldelim = from_utf8(cmd.getArg(1));
 899                 docstring const rname  = from_utf8(cmd.getArg(2));
 900                 docstring const rdelim = from_utf8(cmd.getArg(3));
 901                 latexkeys const * l = in_word_set(lname);
 902                 bool const have_l = l && l->inset == "big" &&
 903                                     InsetMathBig::isBigInsetDelim(ldelim);
 904                 l = in_word_set(rname);
 905                 bool const have_r = l && l->inset == "big" &&
 906                                     InsetMathBig::isBigInsetDelim(rdelim);
 907                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 908                 // or right delimiter.
 909                 if (have_l || have_r) {
 910                         recordUndo(cur, Undo::ATOMIC);
 911                         docstring const selection = grabAndEraseSelection(cur);
 912                         selClearOrDel(cur);
 913                         if (have_l)
 914                                 cur.insert(MathAtom(new InsetMathBig(lname,
 915                                                                 ldelim)));
 916                         cur.niceInsert(selection);
 917                         if (have_r)
 918                                 cur.insert(MathAtom(new InsetMathBig(rname,
 919                                                                 rdelim)));
 920                 }
 921                 // Don't call cur.undispatched() if we did nothing, this would
 922                 // lead to infinite recursion via LyXText::dispatch().
 923                 break;
 924         }
 925
 926         case LFUN_SPACE_INSERT:
 927         case LFUN_MATH_SPACE:
 928                 recordUndo(cur, Undo::ATOMIC);
 929                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 930                 break;
 931
 932         case LFUN_ERT_INSERT:
 933                 // interpret this as if a backslash was typed
 934                 recordUndo(cur, Undo::ATOMIC);
 935                 interpretChar(cur, '\\');
 936                 break;
 937
 938         case LFUN_MATH_SUBSCRIPT:
 939                 // interpret this as if a _ was typed
 940                 recordUndo(cur, Undo::ATOMIC);
 941                 interpretChar(cur, '_');
 942                 break;
 943
 944         case LFUN_MATH_SUPERSCRIPT:
 945                 // interpret this as if a ^ was typed
 946                 recordUndo(cur, Undo::ATOMIC);
 947                 interpretChar(cur, '^');
 948                 break;
 949
 950 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 951 // handling such that "self-insert" works on "arbitrary stuff" too, and
 952 // math-insert only handles special math things like "matrix".
 953         case LFUN_MATH_INSERT: {
 954                 recordUndo(cur, Undo::ATOMIC);
 955                 if (cmd.argument() == "^" || cmd.argument() == "_") {
 956                         interpretChar(cur, cmd.argument()[0]);
 957                 } else
 958                         cur.niceInsert(cmd.argument());
 959                 break;
 960                 }
 961
 962         case LFUN_DIALOG_SHOW_NEW_INSET: {
 963                 docstring const & name = cmd.argument();
 964                 string data;
 965                 if (name == "ref") {
 966                         RefInset tmp(name);
 967                         data = tmp.createDialogStr(to_utf8(name));
 968                 }
 969                 cur.bv().showInsetDialog(to_utf8(name), data, 0);
 970                 break;
 971         }
 972
 973         case LFUN_INSET_INSERT: {
 974                 MathArray ar;
 975                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
 976                         recordUndo(cur);
 977                         cur.insert(ar);
 978                 } else
 979                         cur.undispatched();
 980                 break;
 981         }
 982
 983         default:
 984                 InsetMathDim::doDispatch(cur, cmd);
 985                 break;
 986         }
 987 }
 988
 989
 990 bool InsetMathNest::getStatus(LCursor & cur, FuncRequest const & cmd,
 991                 FuncStatus & flag) const
 992 {
 993         // the font related toggles
 994         //string tc = "mathnormal";
 995         bool ret = true;
 996         string const arg = to_utf8(cmd.argument());
 997         switch (cmd.action) {
 998         case LFUN_TABULAR_FEATURE:
 999                 flag.enabled(false);
1000                 break;
1001 #if 0
1002         case LFUN_TABULAR_FEATURE:
1003                 // FIXME: check temporarily disabled
1004                 // valign code
1005                 char align = mathcursor::valign();
1006                 if (align == '\0') {
1007                         enable = false;
1008                         break;
1009                 }
1010                 if (cmd.argument().empty()) {
1011                         flag.clear();
1012                         break;
1013                 }
1014                 if (!contains("tcb", cmd.argument()[0])) {
1015                         enable = false;
1016                         break;
1017                 }
1018                 flag.setOnOff(cmd.argument()[0] == align);
1019                 break;
1020 #endif
1021         /// We have to handle them since 1.4 blocks all unhandled actions
1022         case LFUN_FONT_ITAL:
1023         case LFUN_FONT_BOLD:
1024         case LFUN_FONT_SANS:
1025         case LFUN_FONT_EMPH:
1026         case LFUN_FONT_CODE:
1027         case LFUN_FONT_NOUN:
1028         case LFUN_FONT_ROMAN:
1029         case LFUN_FONT_DEFAULT:
1030                 flag.enabled(true);
1031                 break;
1032         case LFUN_MATH_MUTATE:
1033                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1034                 flag.setOnOff(false);
1035                 break;
1036
1037         // we just need to be in math mode to enable that
1038         case LFUN_MATH_SIZE:
1039         case LFUN_MATH_SPACE:
1040         case LFUN_MATH_LIMITS:
1041         case LFUN_MATH_NONUMBER:
1042         case LFUN_MATH_NUMBER:
1043         case LFUN_MATH_EXTERN:
1044                 flag.enabled(true);
1045                 break;
1046
1047         case LFUN_FONT_FRAK:
1048                 flag.enabled(currentMode() != TEXT_MODE);
1049                 break;
1050
1051         case LFUN_MATH_INSERT: {
1052                 bool const textarg =
1053                         arg == "\\textbf"   || arg == "\\textsf" ||
1054                         arg == "\\textrm"   || arg == "\\textmd" ||
1055                         arg == "\\textit"   || arg == "\\textsc" ||
1056                         arg == "\\textsl"   || arg == "\\textup" ||
1057                         arg == "\\texttt"   || arg == "\\textbb" ||
1058                         arg == "\\textnormal";
1059                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1060                 break;
1061         }
1062
1063         case LFUN_MATH_MATRIX:
1064                 flag.enabled(currentMode() == MATH_MODE);
1065                 break;
1066
1067         case LFUN_INSET_INSERT: {
1068                 // Don't test createMathInset_fromDialogStr(), since
1069                 // getStatus is not called with a valid reference and the
1070                 // dialog would not be applyable.
1071                 string const name = cmd.getArg(0);
1072                 flag.enabled(name == "ref");
1073                 break;
1074         }
1075
1076         case LFUN_MATH_DELIM:
1077         case LFUN_MATH_BIGDELIM:
1078                 // Don't do this with multi-cell selections
1079                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1080                 break;
1081
1082         default:
1083                 ret = false;
1084                 break;
1085         }
1086         return ret;
1087 }
1088
1089
1090 void InsetMathNest::edit(LCursor & cur, bool left)
1091 {
1092         cur.push(*this);
1093         cur.idx() = left ? 0 : cur.lastidx();
1094         cur.pos() = left ? 0 : cur.lastpos();
1095         cur.resetAnchor();
1096         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1097 }
1098
1099
1100 InsetBase * InsetMathNest::editXY(LCursor & cur, int x, int y)
1101 {
1102         int idx_min = 0;
1103         int dist_min = 1000000;
1104         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1105                 int const d = cell(i).dist(cur.bv(), x, y);
1106                 if (d < dist_min) {
1107                         dist_min = d;
1108                         idx_min = i;
1109                 }
1110         }
1111         MathArray & ar = cell(idx_min);
1112         cur.push(*this);
1113         cur.idx() = idx_min;
1114         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1115
1116         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1117         if (dist_min == 0) {
1118                 // hit inside cell
1119                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1120                         if (ar[i]->covers(cur.bv(), x, y))
1121                                 return ar[i].nucleus()->editXY(cur, x, y);
1122         }
1123         return this;
1124 }
1125
1126
1127 void InsetMathNest::lfunMousePress(LCursor & cur, FuncRequest & cmd)
1128 {
1129         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1130         BufferView & bv = cur.bv();
1131         if (cmd.button() == mouse_button::button1) {
1132                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1133                 bv.mouseSetCursor(cur);
1134                 cur.noUpdate();
1135         } else if (cmd.button() == mouse_button::button2) {
1136                 MathArray ar;
1137                 if (cur.selection())
1138                         asArray(bv.cursor().selectionAsString(false), ar);
1139                 else
1140                         asArray(theSelection().get(), ar);
1141
1142                 cur.insert(ar);
1143                 bv.mouseSetCursor(cur);
1144         }
1145 }
1146
1147
1148 void InsetMathNest::lfunMouseMotion(LCursor & cur, FuncRequest & cmd)
1149 {
1150         // only select with button 1
1151         if (cmd.button() == mouse_button::button1) {
1152                 LCursor & bvcur = cur.bv().cursor();
1153                 if (bvcur.anchor_.hasPart(cur)) {
1154                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1155                         bvcur.setCursor(cur);
1156                         bvcur.selection() = true;
1157                         //lyxerr << "MOTION " << bvcur << endl;
1158                 }
1159                 else {
1160                         cur.undispatched();
1161                 }
1162         }
1163 }
1164
1165
1166 void InsetMathNest::lfunMouseRelease(LCursor & cur, FuncRequest & cmd)
1167 {
1168         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1169
1170         if (cmd.button() == mouse_button::button1) {
1171                 //theSelection().put(cur.grabSelection());
1172                 cur.noUpdate();
1173                 return;
1174         }
1175
1176         if (cmd.button() == mouse_button::button3) {
1177                 // try to dispatch to enclosed insets first
1178                 cur.bv().showDialog("mathpanel");
1179                 return;
1180         }
1181
1182         cur.undispatched();
1183 }
1184
1185
1186 bool InsetMathNest::interpretChar(LCursor & cur, char_type c)
1187 {
1188         //lyxerr << "interpret 2: '" << c << "'" << endl;
1189         docstring save_selection;
1190         if (c == '^' || c == '_')
1191                 save_selection = grabAndEraseSelection(cur);
1192
1193         cur.clearTargetX();
1194
1195         // handle macroMode
1196         if (cur.inMacroMode()) {
1197                 docstring name = cur.macroName();
1198
1199                 /// are we currently typing '#1' or '#2' or...?
1200                 if (name == "\\#") {
1201                         cur.backspace();
1202                         int n = c - '0';
1203                         if (n >= 1 && n <= 9)
1204                                 cur.insert(new MathMacroArgument(n));
1205                         return true;
1206                 }
1207
1208                 if (isalpha(c)) {
1209                         cur.activeMacro()->setName(name + docstring(1, c));
1210                         return true;
1211                 }
1212
1213                 // handle 'special char' macros
1214                 if (name == "\\") {
1215                         // remove the '\\'
1216                         if (c == '\\') {
1217                                 cur.backspace();
1218                                 if (currentMode() == InsetMath::TEXT_MODE)
1219                                         cur.niceInsert(createInsetMath("textbackslash"));
1220                                 else
1221                                         cur.niceInsert(createInsetMath("backslash"));
1222                         } else if (c == '{') {
1223                                 cur.backspace();
1224                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1225                         } else if (c == '%') {
1226                                 cur.backspace();
1227                                 cur.niceInsert(MathAtom(new InsetMathComment));
1228                         } else if (c == '#') {
1229                                 BOOST_ASSERT(cur.activeMacro());
1230                                 cur.activeMacro()->setName(name + docstring(1, c));
1231                         } else {
1232                                 cur.backspace();
1233                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1234                         }
1235                         return true;
1236                 }
1237
1238                 // One character big delimiters. The others are handled in
1239                 // interpretString().
1240                 latexkeys const * l = in_word_set(name.substr(1));
1241                 if (name[0] == '\\' && l && l->inset == "big") {
1242                         docstring delim;
1243                         switch (c) {
1244                         case '{':
1245                                 delim = from_ascii("\\{");
1246                                 break;
1247                         case '}':
1248                                 delim = from_ascii("\\}");
1249                                 break;
1250                         default:
1251                                 delim = docstring(1, c);
1252                                 break;
1253                         }
1254                         if (InsetMathBig::isBigInsetDelim(delim)) {
1255                                 // name + delim ared a valid InsetMathBig.
1256                                 // We can't use cur.macroModeClose() because
1257                                 // it does not handle delim.
1258                                 InsetMathUnknown * p = cur.activeMacro();
1259                                 p->finalize();
1260                                 --cur.pos();
1261                                 cur.cell().erase(cur.pos());
1262                                 cur.plainInsert(MathAtom(
1263                                         new InsetMathBig(name.substr(1), delim)));
1264                                 return true;
1265                         }
1266                 }
1267
1268                 // leave macro mode and try again if necessary
1269                 cur.macroModeClose();
1270                 if (c == '{')
1271                         cur.niceInsert(MathAtom(new InsetMathBrace));
1272                 else if (c != ' ')
1273                         interpretChar(cur, c);
1274                 return true;
1275         }
1276
1277         // This is annoying as one has to press <space> far too often.
1278         // Disable it.
1279
1280 #if 0
1281                 // leave autocorrect mode if necessary
1282                 if (autocorrect() && c == ' ') {
1283                         autocorrect() = false;
1284                         return true;
1285                 }
1286 #endif
1287
1288         // just clear selection on pressing the space bar
1289         if (cur.selection() && c == ' ') {
1290                 cur.selection() = false;
1291                 return true;
1292         }
1293
1294         selClearOrDel(cur);
1295
1296         if (c == '\\') {
1297                 //lyxerr << "starting with macro" << endl;
1298                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1299                 return true;
1300         }
1301
1302         if (c == '\n') {
1303                 if (currentMode() == InsetMath::TEXT_MODE)
1304                         cur.insert(c);
1305                 return true;
1306         }
1307
1308         if (c == ' ') {
1309                 if (currentMode() == InsetMath::TEXT_MODE) {
1310                         // insert spaces in text mode,
1311                         // but suppress direct insertion of two spaces in a row
1312                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1313                         // it is better than nothing...
1314                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ') {
1315                                 cur.insert(c);
1316                                 cur.updateFlags(Update::SinglePar | Update::FitCursor);
1317                         }
1318                         return true;
1319                 }
1320                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1321                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1322                         cur.updateFlags(Update::SinglePar | Update::FitCursor);
1323                         return true;
1324                 }
1325
1326                 if (cur.popRight()) {
1327                         cur.updateFlags(Update::FitCursor);
1328                         return true;
1329                 }
1330
1331                 cur.updateFlags(Update::FitCursor);
1332                 // if we are at the very end, leave the formula
1333                 return cur.pos() != cur.lastpos();
1334         }
1335
1336         // These shouldn't work in text mode:
1337         if (currentMode() != InsetMath::TEXT_MODE) {
1338                 if (c == '_') {
1339                         script(cur, false, save_selection);
1340                         return true;
1341                 }
1342                 if (c == '^') {
1343                         script(cur, true, save_selection);
1344                         return true;
1345                 }
1346                 if (c == '~') {
1347                         cur.niceInsert(createInsetMath("sim"));
1348                         return true;
1349                 }
1350         }
1351
1352         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1353             c == '%' || c == '_' || c == '^') {
1354                 cur.niceInsert(createInsetMath(docstring(1, c)));
1355                 return true;
1356         }
1357
1358
1359         // try auto-correction
1360         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1361         //      return true;
1362
1363         // no special circumstances, so insert the character without any fuss
1364         cur.insert(c);
1365         cur.autocorrect() = true;
1366         return true;
1367 }
1368
1369
1370 bool InsetMathNest::interpretString(LCursor & cur, docstring const & str)
1371 {
1372         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1373         // possible
1374         if (!cur.empty() && cur.pos() > 0 &&
1375             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1376                 if (InsetMathBig::isBigInsetDelim(str)) {
1377                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1378                         if (prev[0] == '\\') {
1379                                 prev = prev.substr(1);
1380                                 latexkeys const * l = in_word_set(prev);
1381                                 if (l && l->inset == "big") {
1382                                         cur.cell()[cur.pos() - 1] =
1383                                                 MathAtom(new InsetMathBig(prev, str));
1384                                         return true;
1385                                 }
1386                         }
1387                 }
1388         }
1389         return false;
1390 }
1391
1392
1393 bool InsetMathNest::script(LCursor & cur, bool up,
1394                 docstring const & save_selection)
1395 {
1396         // Hack to get \^ and \_ working
1397         //lyxerr << "handling script: up: " << up << endl;
1398         if (cur.inMacroMode() && cur.macroName() == "\\") {
1399                 if (up)
1400                         cur.niceInsert(createInsetMath("mathcircumflex"));
1401                 else
1402                         interpretChar(cur, '_');
1403                 return true;
1404         }
1405
1406         cur.macroModeClose();
1407         if (asScriptInset() && cur.idx() == 0) {
1408                 // we are in a nucleus of a script inset, move to _our_ script
1409                 InsetMathScript * inset = asScriptInset();
1410                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1411                 inset->ensure(up);
1412                 cur.idx() = inset->idxOfScript(up);
1413                 cur.pos() = 0;
1414         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1415                 --cur.pos();
1416                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1417                 cur.push(*inset);
1418                 inset->ensure(up);
1419                 cur.idx() = inset->idxOfScript(up);
1420                 cur.pos() = cur.lastpos();
1421         } else {
1422                 // convert the thing to our left to a scriptinset or create a new
1423                 // one if in the very first position of the array
1424                 if (cur.pos() == 0) {
1425                         //lyxerr << "new scriptinset" << endl;
1426                         cur.insert(new InsetMathScript(up));
1427                 } else {
1428                         //lyxerr << "converting prev atom " << endl;
1429                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1430                 }
1431                 --cur.pos();
1432                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1433                 // See comment in MathParser.C for special handling of {}-bases
1434
1435                 cur.push(*inset);
1436                 cur.idx() = 1;
1437                 cur.pos() = 0;
1438         }
1439         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1440         cur.niceInsert(save_selection);
1441         cur.resetAnchor();
1442         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1443         return true;
1444 }
1445
1446
1447 } // namespace lyx