src/mathed/InsetMathNest.cpp

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