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 "Bidi.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 "LyXFunc.h"
  47 #include "gettext.h"
  48 #include "Text.h"
  49 #include "OutputParams.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), mouse_hover_(false)
  78 {}
  79
  80
  81 InsetMathNest::InsetMathNest(InsetMathNest const & inset)
  82         : InsetMath(inset), cells_(inset.cells_), lock_(inset.lock_),
  83           mouse_hover_(false)
  84 {}
  85
  86
  87 InsetMathNest & InsetMathNest::operator=(InsetMathNest const & inset)
  88 {
  89         cells_ = inset.cells_;
  90         lock_ = inset.lock_;
  91         mouse_hover_ = false;
  92         InsetMath::operator=(inset);
  93         return *this;
  94 }
  95
  96
  97 InsetMath::idx_type InsetMathNest::nargs() const
  98 {
  99         return cells_.size();
 100 }
 101
 102
 103 void InsetMathNest::cursorPos(BufferView const & bv,
 104                 CursorSlice const & sl, bool /*boundary*/,
 105                 int & x, int & y) const
 106 {
 107 // FIXME: This is a hack. Ideally, the coord cache should not store
 108 // absolute positions, but relative ones. This would mean to call
 109 // setXY() not in MathData::draw(), but in the parent insets' draw()
 110 // with the correctly adjusted x,y values. But this means that we'd have
 111 // to touch all (math)inset's draw() methods. Right now, we'll store
 112 // absolute value, and make them here relative, only to make them
 113 // absolute again when actually drawing the cursor. What a mess.
 114         BOOST_ASSERT(ptr_cmp(&sl.inset(), this));
 115         MathData const & ar = sl.cell();
 116         CoordCache const & coord_cache = bv.coordCache();
 117         if (!coord_cache.getArrays().has(&ar)) {
 118                 // this can (semi-)legally happen if we just created this cell
 119                 // and it never has been drawn before. So don't ASSERT.
 120                 //lyxerr << "no cached data for array " << &ar << endl;
 121                 x = 0;
 122                 y = 0;
 123                 return;
 124         }
 125         Point const pt = coord_cache.getArrays().xy(&ar);
 126         if (!coord_cache.getInsets().has(this)) {
 127                 // same as above
 128                 //lyxerr << "no cached data for inset " << this << endl;
 129                 x = 0;
 130                 y = 0;
 131                 return;
 132         }
 133         Point const pt2 = coord_cache.getInsets().xy(this);
 134         //lyxerr << "retrieving position cache for MathData "
 135         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 136         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 137         y = pt.y_ - pt2.y_;
 138 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 139 //              << " asc: " << ascent() << "  des: " << descent()
 140 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 141         // move cursor visually into empty cells ("blue rectangles");
 142         if (ar.empty())
 143                 x += 2;
 144 }
 145
 146
 147 void InsetMathNest::metrics(MetricsInfo const & mi) const
 148 {
 149         MetricsInfo m = mi;
 150         for (idx_type i = 0, n = nargs(); i != n; ++i) {
 151                 Dimension dim;
 152                 cell(i).metrics(m, dim);
 153         }
 154 }
 155
 156
 157 bool InsetMathNest::idxNext(Cursor & cur) const
 158 {
 159         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 160         if (cur.idx() == cur.lastidx())
 161                 return false;
 162         ++cur.idx();
 163         cur.pos() = 0;
 164         return true;
 165 }
 166
 167
 168 bool InsetMathNest::idxRight(Cursor & cur) const
 169 {
 170         return idxNext(cur);
 171 }
 172
 173
 174 bool InsetMathNest::idxPrev(Cursor & cur) const
 175 {
 176         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 177         if (cur.idx() == 0)
 178                 return false;
 179         --cur.idx();
 180         cur.pos() = cur.lastpos();
 181         return true;
 182 }
 183
 184
 185 bool InsetMathNest::idxLeft(Cursor & cur) const
 186 {
 187         return idxPrev(cur);
 188 }
 189
 190
 191 bool InsetMathNest::idxFirst(Cursor & cur) const
 192 {
 193         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 194         if (nargs() == 0)
 195                 return false;
 196         cur.idx() = 0;
 197         cur.pos() = 0;
 198         return true;
 199 }
 200
 201
 202 bool InsetMathNest::idxLast(Cursor & cur) const
 203 {
 204         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 205         if (nargs() == 0)
 206                 return false;
 207         cur.idx() = cur.lastidx();
 208         cur.pos() = cur.lastpos();
 209         return true;
 210 }
 211
 212
 213 void InsetMathNest::dump() const
 214 {
 215         odocstringstream oss;
 216         WriteStream os(oss);
 217         os << "---------------------------------------------\n";
 218         write(os);
 219         os << "\n";
 220         for (idx_type i = 0, n = nargs(); i != n; ++i)
 221                 os << cell(i) << "\n";
 222         os << "---------------------------------------------\n";
 223         lyxerr << to_utf8(oss.str());
 224 }
 225
 226
 227 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 228 {
 229 #if 0
 230         if (lock_)
 231                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 232                                         Color::mathlockbg);
 233 #endif
 234         setPosCache(pi, x, y);
 235 }
 236
 237
 238 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 239 {
 240         BufferView & bv = *pi.base.bv;
 241         // this should use the x/y values given, not the cached values
 242         Cursor & cur = bv.cursor();
 243         if (!cur.selection())
 244                 return;
 245         if (!ptr_cmp(&cur.inset(), this))
 246                 return;
 247
 248         // FIXME: hack to get position cache warm
 249         pi.pain.setDrawingEnabled(false);
 250         draw(pi, x, y);
 251         pi.pain.setDrawingEnabled(true);
 252
 253         CursorSlice s1 = cur.selBegin();
 254         CursorSlice s2 = cur.selEnd();
 255
 256         //lyxerr << "InsetMathNest::drawing selection: "
 257         //      << " s1: " << s1 << " s2: " << s2 << endl;
 258         if (s1.idx() == s2.idx()) {
 259                 MathData const & c = cell(s1.idx());
 260                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 261                 int x1 = g.pos.x_ + c.pos2x(s1.pos());
 262                 int y1 = g.pos.y_ - g.dim.ascent();
 263                 int x2 = g.pos.x_ + c.pos2x(s2.pos());
 264                 int y2 = g.pos.y_ + g.dim.descent();
 265                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color::selection);
 266         //lyxerr << "InsetMathNest::drawing selection 3: "
 267         //      << " x1: " << x1 << " x2: " << x2
 268         //      << " y1: " << y1 << " y2: " << y2 << endl;
 269         } else {
 270                 for (idx_type i = 0; i < nargs(); ++i) {
 271                         if (idxBetween(i, s1.idx(), s2.idx())) {
 272                                 MathData const & c = cell(i);
 273                                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 274                                 int x1 = g.pos.x_;
 275                                 int y1 = g.pos.y_ - g.dim.ascent();
 276                                 int x2 = g.pos.x_ + g.dim.width();
 277                                 int y2 = g.pos.y_ + g.dim.descent();
 278                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color::selection);
 279                         }
 280                 }
 281         }
 282 }
 283
 284
 285 void InsetMathNest::validate(LaTeXFeatures & features) const
 286 {
 287         for (idx_type i = 0; i < nargs(); ++i)
 288                 cell(i).validate(features);
 289 }
 290
 291
 292 void InsetMathNest::replace(ReplaceData & rep)
 293 {
 294         for (idx_type i = 0; i < nargs(); ++i)
 295                 cell(i).replace(rep);
 296 }
 297
 298
 299 bool InsetMathNest::contains(MathData const & ar) const
 300 {
 301         for (idx_type i = 0; i < nargs(); ++i)
 302                 if (cell(i).contains(ar))
 303                         return true;
 304         return false;
 305 }
 306
 307
 308 bool InsetMathNest::lock() const
 309 {
 310         return lock_;
 311 }
 312
 313
 314 void InsetMathNest::lock(bool l)
 315 {
 316         lock_ = l;
 317 }
 318
 319
 320 bool InsetMathNest::isActive() const
 321 {
 322         return nargs() > 0;
 323 }
 324
 325
 326 MathData InsetMathNest::glue() const
 327 {
 328         MathData ar;
 329         for (size_t i = 0; i < nargs(); ++i)
 330                 ar.append(cell(i));
 331         return ar;
 332 }
 333
 334
 335 void InsetMathNest::write(WriteStream & os) const
 336 {
 337         os << '\\' << name().c_str();
 338         for (size_t i = 0; i < nargs(); ++i)
 339                 os << '{' << cell(i) << '}';
 340         if (nargs() == 0)
 341                 os.pendingSpace(true);
 342         if (lock_ && !os.latex()) {
 343                 os << "\\lyxlock";
 344                 os.pendingSpace(true);
 345         }
 346 }
 347
 348
 349 void InsetMathNest::normalize(NormalStream & os) const
 350 {
 351         os << '[' << name().c_str();
 352         for (size_t i = 0; i < nargs(); ++i)
 353                 os << ' ' << cell(i);
 354         os << ']';
 355 }
 356
 357
 358 int InsetMathNest::latex(Buffer const &, odocstream & os,
 359                         OutputParams const & runparams) const
 360 {
 361         WriteStream wi(os, runparams.moving_arg, true);
 362         write(wi);
 363         return wi.line();
 364 }
 365
 366
 367 bool InsetMathNest::setMouseHover(bool mouse_hover)
 368 {
 369         mouse_hover_ = mouse_hover;
 370         return true;
 371 }
 372
 373
 374 bool InsetMathNest::notifyCursorLeaves(Cursor & /*cur*/)
 375 {
 376         // FIXME: look here
 377 #if 0
 378         MathData & ar = cur.cell();
 379         // remove base-only "scripts"
 380         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 381                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 382                 if (p && p->nargs() == 1) {
 383                         MathData ar = p->nuc();
 384                         erase(i);
 385                         insert(i, ar);
 386                         cur.adjust(i, ar.size() - 1);
 387                 }
 388         }
 389
 390         // glue adjacent font insets of the same kind
 391         for (pos_type i = 0; i + 1 < size(); ++i) {
 392                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 393                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 394                 if (p && q && p->name() == q->name()) {
 395                         p->cell(0).append(q->cell(0));
 396                         erase(i + 1);
 397                         cur.adjust(i, -1);
 398                 }
 399         }
 400 #endif
 401         return false;
 402 }
 403
 404
 405 void InsetMathNest::handleFont
 406         (Cursor & cur, docstring const & arg, char const * const font)
 407 {
 408         handleFont(cur, arg, from_ascii(font));
 409 }
 410
 411
 412 void InsetMathNest::handleFont
 413         (Cursor & cur, docstring const & arg, docstring const & font)
 414 {
 415         // this whole function is a hack and won't work for incremental font
 416         // changes...
 417
 418         if (cur.inset().asInsetMath()->name() == font) {
 419                 cur.recordUndoInset();
 420                 cur.handleFont(to_utf8(font));
 421         } else {
 422                 cur.recordUndo();
 423                 cur.handleNest(createInsetMath(font));
 424                 cur.insert(arg);
 425         }
 426 }
 427
 428
 429 void InsetMathNest::handleFont2(Cursor & cur, docstring const & arg)
 430 {
 431         cur.recordUndo();
 432         Font font;
 433         bool b;
 434         font.fromString(to_utf8(arg), b);
 435         if (font.color() != Color::inherit) {
 436                 MathAtom at = MathAtom(new InsetMathColor(true, font.color()));
 437                 cur.handleNest(at, 0);
 438         }
 439 }
 440
 441
 442 void InsetMathNest::doDispatch(Cursor & cur, FuncRequest & cmd)
 443 {
 444         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 445         //CursorSlice sl = cur.current();
 446
 447         switch (cmd.action) {
 448
 449         case LFUN_PASTE: {
 450                 cur.recordUndo();
 451                 cur.message(_("Paste"));
 452                 replaceSelection(cur);
 453                 docstring topaste;
 454                 if (cmd.argument().empty() && !theClipboard().isInternal())
 455                         topaste = theClipboard().getAsText();
 456                 else {
 457                         size_t n = 0;
 458                         idocstringstream is(cmd.argument());
 459                         is >> n;
 460                         topaste = cap::getSelection(cur.buffer(), n);
 461                 }
 462                 cur.niceInsert(topaste);
 463                 cur.clearSelection(); // bug 393
 464                 cur.finishUndo();
 465                 break;
 466         }
 467
 468         case LFUN_CUT:
 469                 cur.recordUndo();
 470                 cutSelection(cur, true, true);
 471                 cur.message(_("Cut"));
 472                 // Prevent stale position >= size crash
 473                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 474                 cur.normalize();
 475                 break;
 476
 477         case LFUN_COPY:
 478                 copySelection(cur);
 479                 cur.message(_("Copy"));
 480                 break;
 481
 482         case LFUN_MOUSE_PRESS:
 483                 lfunMousePress(cur, cmd);
 484                 break;
 485
 486         case LFUN_MOUSE_MOTION:
 487                 lfunMouseMotion(cur, cmd);
 488                 break;
 489
 490         case LFUN_MOUSE_RELEASE:
 491                 lfunMouseRelease(cur, cmd);
 492                 break;
 493
 494         case LFUN_FINISHED_BACKWARD:
 495                 cur.bv().cursor() = cur;
 496                 break;
 497
 498         case LFUN_FINISHED_FORWARD:
 499                 ++cur.pos();
 500                 cur.bv().cursor() = cur;
 501                 break;
 502
 503         case LFUN_CHAR_FORWARD:
 504                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 505         case LFUN_CHAR_FORWARD_SELECT:
 506                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 507                 cur.autocorrect() = false;
 508                 cur.clearTargetX();
 509                 cur.macroModeClose();
 510                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 511                         cur.pushLeft(*cur.nextAtom().nucleus());
 512                         cur.inset().idxFirst(cur);
 513                 } else if (cur.posRight() || idxRight(cur)
 514                         || cur.popRight() || cur.selection())
 515                         ;
 516                 else {
 517                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 518                         cur.undispatched();
 519                 }
 520                 break;
 521
 522         case LFUN_CHAR_BACKWARD:
 523                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 524         case LFUN_CHAR_BACKWARD_SELECT:
 525                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 526                 cur.autocorrect() = false;
 527                 cur.clearTargetX();
 528                 cur.macroModeClose();
 529                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 530                         cur.posLeft();
 531                         cur.push(*cur.nextAtom().nucleus());
 532                         cur.inset().idxLast(cur);
 533                 } else if (cur.posLeft() || idxLeft(cur)
 534                         || cur.popLeft() || cur.selection())
 535                         ;
 536                 else {
 537                         cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 538                         cur.undispatched();
 539                 }
 540                 break;
 541
 542         case LFUN_CHAR_RIGHT:
 543         case LFUN_CHAR_RIGHT_SELECT:
 544                 //FIXME: for visual cursor, really move right
 545                 if (reverseDirectionNeeded(cur))
 546                         lyx::dispatch(FuncRequest(
 547                                 cmd.action == LFUN_CHAR_RIGHT_SELECT ?
 548                                         LFUN_CHAR_BACKWARD_SELECT : LFUN_CHAR_BACKWARD));
 549                 else
 550                         lyx::dispatch(FuncRequest(
 551                                 cmd.action == LFUN_CHAR_RIGHT_SELECT ?
 552                                         LFUN_CHAR_FORWARD_SELECT : LFUN_CHAR_FORWARD));
 553                 break;
 554
 555         case LFUN_CHAR_LEFT:
 556         case LFUN_CHAR_LEFT_SELECT:
 557                 //FIXME: for visual cursor, really move left
 558                 if (reverseDirectionNeeded(cur))
 559                         lyx::dispatch(FuncRequest(
 560                                 cmd.action == LFUN_CHAR_LEFT_SELECT ?
 561                                         LFUN_CHAR_FORWARD_SELECT : LFUN_CHAR_FORWARD));
 562                 else
 563                         lyx::dispatch(FuncRequest(
 564                                 cmd.action == LFUN_CHAR_LEFT_SELECT ?
 565                                         LFUN_CHAR_BACKWARD_SELECT : LFUN_CHAR_BACKWARD));
 566                 break;
 567
 568         case LFUN_DOWN:
 569         case LFUN_UP:
 570                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 571         case LFUN_DOWN_SELECT:
 572         case LFUN_UP_SELECT: {
 573                 // close active macro
 574                 if (cur.inMacroMode()) {
 575                         cur.macroModeClose();
 576                         break;
 577                 }
 578
 579                 // stop/start the selection
 580                 bool select = cmd.action == LFUN_DOWN_SELECT ||
 581                         cmd.action == LFUN_UP_SELECT;
 582                 cur.selHandle(select);
 583
 584                 // go up/down
 585                 bool up = cmd.action == LFUN_UP || cmd.action == LFUN_UP_SELECT;
 586                 bool successful = cur.upDownInMath(up);
 587                 if (successful) {
 588                         // notify left insets and give them chance to set update flags
 589                         lyx::notifyCursorLeaves(cur.beforeDispatchCursor(), cur);
 590                         cur.fixIfBroken();
 591                         break;
 592                 }
 593
 594                 if (cur.fixIfBroken())
 595                         // FIXME: Something bad happened. We pass the corrected Cursor
 596                         // instead of letting things go worse.
 597                         break;
 598
 599                 // We did not manage to move the cursor.
 600                 cur.undispatched();
 601                 break;
 602         }
 603
 604         case LFUN_MOUSE_DOUBLE:
 605         case LFUN_MOUSE_TRIPLE:
 606         case LFUN_WORD_SELECT:
 607                 cur.pos() = 0;
 608                 cur.idx() = 0;
 609                 cur.resetAnchor();
 610                 cur.selection() = true;
 611                 cur.pos() = cur.lastpos();
 612                 cur.idx() = cur.lastidx();
 613                 break;
 614
 615         case LFUN_PARAGRAPH_UP:
 616         case LFUN_PARAGRAPH_DOWN:
 617                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 618         case LFUN_PARAGRAPH_UP_SELECT:
 619         case LFUN_PARAGRAPH_DOWN_SELECT:
 620                 break;
 621
 622         case LFUN_LINE_BEGIN:
 623         case LFUN_WORD_BACKWARD:
 624                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 625         case LFUN_LINE_BEGIN_SELECT:
 626         case LFUN_WORD_BACKWARD_SELECT:
 627                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 628                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 629                 cur.macroModeClose();
 630                 if (cur.pos() != 0) {
 631                         cur.pos() = 0;
 632                 } else if (cur.col() != 0) {
 633                         cur.idx() -= cur.col();
 634                         cur.pos() = 0;
 635                 } else if (cur.idx() != 0) {
 636                         cur.idx() = 0;
 637                         cur.pos() = 0;
 638                 } else {
 639                         cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 640                         cur.undispatched();
 641                 }
 642                 break;
 643
 644         case LFUN_WORD_FORWARD:
 645         case LFUN_LINE_END:
 646                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 647         case LFUN_WORD_FORWARD_SELECT:
 648         case LFUN_LINE_END_SELECT:
 649                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 650                                 cmd.action == LFUN_LINE_END_SELECT);
 651                 cur.macroModeClose();
 652                 cur.clearTargetX();
 653                 if (cur.pos() != cur.lastpos()) {
 654                         cur.pos() = cur.lastpos();
 655                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 656                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 657                         cur.pos() = cur.lastpos();
 658                 } else if (cur.idx() != cur.lastidx()) {
 659                         cur.idx() = cur.lastidx();
 660                         cur.pos() = cur.lastpos();
 661                 } else {
 662                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 663                         cur.undispatched();
 664                 }
 665                 break;
 666
 667         case LFUN_SCREEN_UP_SELECT:
 668                 cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 669                 cur.undispatched();
 670                 break;
 671
 672         case LFUN_SCREEN_DOWN_SELECT:
 673                 cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 674                 cur.undispatched();
 675                 break;
 676
 677         case LFUN_CELL_FORWARD:
 678                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 679                 cur.inset().idxNext(cur);
 680                 break;
 681
 682         case LFUN_CELL_BACKWARD:
 683                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 684                 cur.inset().idxPrev(cur);
 685                 break;
 686
 687         case LFUN_WORD_DELETE_BACKWARD:
 688         case LFUN_CHAR_DELETE_BACKWARD:
 689                 if (cur.pos() == 0)
 690                         // May affect external cell:
 691                         cur.recordUndoInset();
 692                 else
 693                         cur.recordUndo();
 694                 // if the inset can not be removed from within, delete it
 695                 if (!cur.backspace()) {
 696                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 697                         cur.innerText()->dispatch(cur, cmd);
 698                 }
 699                 break;
 700
 701         case LFUN_WORD_DELETE_FORWARD:
 702         case LFUN_CHAR_DELETE_FORWARD:
 703                 if (cur.pos() == cur.lastpos())
 704                         // May affect external cell:
 705                         cur.recordUndoInset();
 706                 else
 707                         cur.recordUndo();
 708                 // if the inset can not be removed from within, delete it
 709                 if (!cur.erase()) {
 710                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 711                         cur.innerText()->dispatch(cur, cmd);
 712                 }
 713                 break;
 714
 715         case LFUN_ESCAPE:
 716                 if (cur.selection())
 717                         cur.clearSelection();
 718                 else  {
 719                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 720                         cur.undispatched();
 721                 }
 722                 break;
 723
 724         case LFUN_INSET_TOGGLE:
 725                 cur.recordUndo();
 726                 lock(!lock());
 727                 cur.popRight();
 728                 break;
 729
 730         case LFUN_SELF_INSERT:
 731                 if (cmd.argument().size() != 1) {
 732                         cur.recordUndo();
 733                         docstring const arg = cmd.argument();
 734                         if (!interpretString(cur, arg))
 735                                 cur.insert(arg);
 736                         break;
 737                 }
 738                 // Don't record undo steps if we are in macro mode and
 739                 // cmd.argument is the next character of the macro name.
 740                 // Otherwise we'll get an invalid cursor if we undo after
 741                 // the macro was finished and the macro is a known command,
 742                 // e.g. sqrt. Cursor::macroModeClose replaces in this case
 743                 // the InsetMathUnknown with name "frac" by an empty
 744                 // InsetMathFrac -> a pos value > 0 is invalid.
 745                 // A side effect is that an undo before the macro is finished
 746                 // undoes the complete macro, not only the last character.
 747                 if (!cur.inMacroMode())
 748                         cur.recordUndo();
 749
 750                 // spacial handling of space. If we insert an inset
 751                 // via macro mode, we want to put the cursor inside it
 752                 // if relevant. Think typing "\frac<space>".
 753                 if (cmd.argument()[0] == ' '
 754                     && cur.inMacroMode() && cur.macroName() != "\\"
 755                     && cur.macroModeClose()) {
 756                         MathAtom const atom = cur.prevAtom();
 757                         if (atom->asNestInset() && atom->isActive()) {
 758                                 cur.posLeft();
 759                                 cur.pushLeft(*cur.nextInset());
 760                         }
 761                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 762                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 763                         cur.undispatched();
 764                 }
 765                 break;
 766
 767         //case LFUN_SERVER_GET_XY:
 768         //      sprintf(dispatch_buffer, "%d %d",);
 769         //      break;
 770
 771         case LFUN_SERVER_SET_XY: {
 772                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 773                 int x = 0;
 774                 int y = 0;
 775                 istringstream is(to_utf8(cmd.argument()));
 776                 is >> x >> y;
 777                 cur.setScreenPos(x, y);
 778                 break;
 779         }
 780
 781         // Special casing for superscript in case of LyX handling
 782         // dead-keys:
 783         case LFUN_ACCENT_CIRCUMFLEX:
 784                 if (cmd.argument().empty()) {
 785                         // do superscript if LyX handles
 786                         // deadkeys
 787                         cur.recordUndo();
 788                         script(cur, true, grabAndEraseSelection(cur));
 789                 }
 790                 break;
 791
 792         case LFUN_ACCENT_UMLAUT:
 793         case LFUN_ACCENT_ACUTE:
 794         case LFUN_ACCENT_GRAVE:
 795         case LFUN_ACCENT_BREVE:
 796         case LFUN_ACCENT_DOT:
 797         case LFUN_ACCENT_MACRON:
 798         case LFUN_ACCENT_CARON:
 799         case LFUN_ACCENT_TILDE:
 800         case LFUN_ACCENT_CEDILLA:
 801         case LFUN_ACCENT_CIRCLE:
 802         case LFUN_ACCENT_UNDERDOT:
 803         case LFUN_ACCENT_TIE:
 804         case LFUN_ACCENT_OGONEK:
 805         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 806                 break;
 807
 808         //  Math fonts
 809         case LFUN_FONT_FREE_APPLY:
 810         case LFUN_FONT_FREE_UPDATE:
 811                 handleFont2(cur, cmd.argument());
 812                 break;
 813
 814         case LFUN_FONT_BOLD:
 815                 if (currentMode() == TEXT_MODE)
 816                         handleFont(cur, cmd.argument(), "textbf");
 817                 else
 818                         handleFont(cur, cmd.argument(), "mathbf");
 819                 break;
 820         case LFUN_FONT_SANS:
 821                 if (currentMode() == TEXT_MODE)
 822                         handleFont(cur, cmd.argument(), "textsf");
 823                 else
 824                         handleFont(cur, cmd.argument(), "mathsf");
 825                 break;
 826         case LFUN_FONT_EMPH:
 827                 if (currentMode() == TEXT_MODE)
 828                         handleFont(cur, cmd.argument(), "emph");
 829                 else
 830                         handleFont(cur, cmd.argument(), "mathcal");
 831                 break;
 832         case LFUN_FONT_ROMAN:
 833                 if (currentMode() == TEXT_MODE)
 834                         handleFont(cur, cmd.argument(), "textrm");
 835                 else
 836                         handleFont(cur, cmd.argument(), "mathrm");
 837                 break;
 838         case LFUN_FONT_TYPEWRITER:
 839                 if (currentMode() == TEXT_MODE)
 840                         handleFont(cur, cmd.argument(), "texttt");
 841                 else
 842                         handleFont(cur, cmd.argument(), "mathtt");
 843                 break;
 844         case LFUN_FONT_FRAK:
 845                 handleFont(cur, cmd.argument(), "mathfrak");
 846                 break;
 847         case LFUN_FONT_ITAL:
 848                 if (currentMode() == TEXT_MODE)
 849                         handleFont(cur, cmd.argument(), "textit");
 850                 else
 851                         handleFont(cur, cmd.argument(), "mathit");
 852                 break;
 853         case LFUN_FONT_NOUN:
 854                 if (currentMode() == TEXT_MODE)
 855                         // FIXME: should be "noun"
 856                         handleFont(cur, cmd.argument(), "textsc");
 857                 else
 858                         handleFont(cur, cmd.argument(), "mathbb");
 859                 break;
 860         /*
 861         case LFUN_FONT_FREE_APPLY:
 862                 handleFont(cur, cmd.argument(), "textrm");
 863                 break;
 864         */
 865         case LFUN_FONT_DEFAULT:
 866                 handleFont(cur, cmd.argument(), "textnormal");
 867                 break;
 868
 869         case LFUN_MATH_MODE: {
 870 #if 1
 871                 // ignore math-mode on when already in math mode
 872                 if (currentMode() == Inset::MATH_MODE && cmd.argument() == "on")
 873                         break;
 874                 cur.macroModeClose();
 875                 docstring const save_selection = grabAndEraseSelection(cur);
 876                 selClearOrDel(cur);
 877                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 878                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 879                 cur.posLeft();
 880                 cur.pushLeft(*cur.nextInset());
 881                 cur.niceInsert(save_selection);
 882 #else
 883                 if (currentMode() == Inset::TEXT_MODE) {
 884                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 885                         cur.message(_("create new math text environment ($...$)"));
 886                 } else {
 887                         handleFont(cur, cmd.argument(), "textrm");
 888                         cur.message(_("entered math text mode (textrm)"));
 889                 }
 890 #endif
 891                 break;
 892         }
 893
 894         case LFUN_MATH_SIZE:
 895 #if 0
 896                 cur.recordUndo();
 897                 cur.setSize(arg);
 898 #endif
 899                 break;
 900
 901         case LFUN_MATH_MATRIX: {
 902                 cur.recordUndo();
 903                 unsigned int m = 1;
 904                 unsigned int n = 1;
 905                 docstring v_align;
 906                 docstring h_align;
 907                 idocstringstream is(cmd.argument());
 908                 is >> m >> n >> v_align >> h_align;
 909                 if (m < 1)
 910                         m = 1;
 911                 if (n < 1)
 912                         n = 1;
 913                 v_align += 'c';
 914                 cur.niceInsert(
 915                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 916                 break;
 917         }
 918
 919         case LFUN_MATH_DELIM: {
 920                 docstring ls;
 921                 docstring rs = support::split(cmd.argument(), ls, ' ');
 922                 // Reasonable default values
 923                 if (ls.empty())
 924                         ls = '(';
 925                 if (rs.empty())
 926                         rs = ')';
 927                 cur.recordUndo();
 928                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 929                 break;
 930         }
 931
 932         case LFUN_MATH_BIGDELIM: {
 933                 docstring const lname  = from_utf8(cmd.getArg(0));
 934                 docstring const ldelim = from_utf8(cmd.getArg(1));
 935                 docstring const rname  = from_utf8(cmd.getArg(2));
 936                 docstring const rdelim = from_utf8(cmd.getArg(3));
 937                 latexkeys const * l = in_word_set(lname);
 938                 bool const have_l = l && l->inset == "big" &&
 939                                     InsetMathBig::isBigInsetDelim(ldelim);
 940                 l = in_word_set(rname);
 941                 bool const have_r = l && l->inset == "big" &&
 942                                     InsetMathBig::isBigInsetDelim(rdelim);
 943                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 944                 // or right delimiter.
 945                 if (have_l || have_r) {
 946                         cur.recordUndo();
 947                         docstring const selection = grabAndEraseSelection(cur);
 948                         selClearOrDel(cur);
 949                         if (have_l)
 950                                 cur.insert(MathAtom(new InsetMathBig(lname,
 951                                                                 ldelim)));
 952                         cur.niceInsert(selection);
 953                         if (have_r)
 954                                 cur.insert(MathAtom(new InsetMathBig(rname,
 955                                                                 rdelim)));
 956                 }
 957                 // Don't call cur.undispatched() if we did nothing, this would
 958                 // lead to infinite recursion via Text::dispatch().
 959                 break;
 960         }
 961
 962         case LFUN_SPACE_INSERT:
 963         case LFUN_MATH_SPACE:
 964                 cur.recordUndo();
 965                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 966                 break;
 967
 968         case LFUN_ERT_INSERT:
 969                 // interpret this as if a backslash was typed
 970                 cur.recordUndo();
 971                 interpretChar(cur, '\\');
 972                 break;
 973
 974         case LFUN_MATH_SUBSCRIPT:
 975                 // interpret this as if a _ was typed
 976                 cur.recordUndo();
 977                 interpretChar(cur, '_');
 978                 break;
 979
 980         case LFUN_MATH_SUPERSCRIPT:
 981                 // interpret this as if a ^ was typed
 982                 cur.recordUndo();
 983                 interpretChar(cur, '^');
 984                 break;
 985
 986         case LFUN_QUOTE_INSERT:
 987                 // interpret this as if a straight " was typed
 988                 cur.recordUndo();
 989                 interpretChar(cur, '\"');
 990                 break;
 991
 992 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 993 // handling such that "self-insert" works on "arbitrary stuff" too, and
 994 // math-insert only handles special math things like "matrix".
 995         case LFUN_MATH_INSERT: {
 996                 cur.recordUndo();
 997                 if (cmd.argument() == "^" || cmd.argument() == "_") {
 998                         interpretChar(cur, cmd.argument()[0]);
 999                 } else
1000                         cur.niceInsert(cmd.argument());
1001                 break;
1002                 }
1003
1004         case LFUN_DIALOG_SHOW_NEW_INSET: {
1005                 docstring const & name = cmd.argument();
1006                 string data;
1007                 if (name == "ref") {
1008                         InsetMathRef tmp(name);
1009                         data = tmp.createDialogStr(to_utf8(name));
1010                 }
1011                 cur.bv().showInsetDialog(to_utf8(name), data, 0);
1012                 break;
1013         }
1014
1015         case LFUN_INSET_INSERT: {
1016                 MathData ar;
1017                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
1018                         cur.recordUndo();
1019                         cur.insert(ar);
1020                 } else
1021                         cur.undispatched();
1022                 break;
1023         }
1024         case LFUN_INSET_DISSOLVE:
1025                 if (!asHullInset()) {
1026                         cur.recordUndoInset();
1027                         cur.pullArg();
1028                 }
1029                 break;
1030
1031         default:
1032                 InsetMath::doDispatch(cur, cmd);
1033                 break;
1034         }
1035 }
1036
1037
1038 bool InsetMathNest::getStatus(Cursor & cur, FuncRequest const & cmd,
1039                 FuncStatus & flag) const
1040 {
1041         // the font related toggles
1042         //string tc = "mathnormal";
1043         bool ret = true;
1044         string const arg = to_utf8(cmd.argument());
1045         switch (cmd.action) {
1046         case LFUN_TABULAR_FEATURE:
1047                 flag.enabled(false);
1048                 break;
1049 #if 0
1050         case LFUN_TABULAR_FEATURE:
1051                 // FIXME: check temporarily disabled
1052                 // valign code
1053                 char align = mathcursor::valign();
1054                 if (align == '\0') {
1055                         enable = false;
1056                         break;
1057                 }
1058                 if (cmd.argument().empty()) {
1059                         flag.clear();
1060                         break;
1061                 }
1062                 if (!contains("tcb", cmd.argument()[0])) {
1063                         enable = false;
1064                         break;
1065                 }
1066                 flag.setOnOff(cmd.argument()[0] == align);
1067                 break;
1068 #endif
1069         /// We have to handle them since 1.4 blocks all unhandled actions
1070         case LFUN_FONT_ITAL:
1071         case LFUN_FONT_BOLD:
1072         case LFUN_FONT_SANS:
1073         case LFUN_FONT_EMPH:
1074         case LFUN_FONT_TYPEWRITER:
1075         case LFUN_FONT_NOUN:
1076         case LFUN_FONT_ROMAN:
1077         case LFUN_FONT_DEFAULT:
1078                 flag.enabled(true);
1079                 break;
1080         case LFUN_MATH_MUTATE:
1081                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1082                 flag.setOnOff(false);
1083                 break;
1084
1085         // we just need to be in math mode to enable that
1086         case LFUN_MATH_SIZE:
1087         case LFUN_MATH_SPACE:
1088         case LFUN_MATH_LIMITS:
1089         case LFUN_MATH_NONUMBER:
1090         case LFUN_MATH_NUMBER:
1091         case LFUN_MATH_EXTERN:
1092                 flag.enabled(true);
1093                 break;
1094
1095         case LFUN_FONT_FRAK:
1096                 flag.enabled(currentMode() != TEXT_MODE);
1097                 break;
1098
1099         case LFUN_MATH_INSERT: {
1100                 bool const textarg =
1101                         arg == "\\textbf"   || arg == "\\textsf" ||
1102                         arg == "\\textrm"   || arg == "\\textmd" ||
1103                         arg == "\\textit"   || arg == "\\textsc" ||
1104                         arg == "\\textsl"   || arg == "\\textup" ||
1105                         arg == "\\texttt"   || arg == "\\textbb" ||
1106                         arg == "\\textnormal";
1107                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1108                 break;
1109         }
1110
1111         case LFUN_MATH_MATRIX:
1112                 flag.enabled(currentMode() == MATH_MODE);
1113                 break;
1114
1115         case LFUN_INSET_INSERT: {
1116                 // Don't test createMathInset_fromDialogStr(), since
1117                 // getStatus is not called with a valid reference and the
1118                 // dialog would not be applyable.
1119                 string const name = cmd.getArg(0);
1120                 flag.enabled(name == "ref");
1121                 break;
1122         }
1123
1124         case LFUN_MATH_DELIM:
1125         case LFUN_MATH_BIGDELIM:
1126                 // Don't do this with multi-cell selections
1127                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1128                 break;
1129
1130         case LFUN_HYPHENATION_POINT_INSERT:
1131         case LFUN_LIGATURE_BREAK_INSERT:
1132         case LFUN_MENU_SEPARATOR_INSERT:
1133         case LFUN_DOTS_INSERT:
1134         case LFUN_END_OF_SENTENCE_PERIOD_INSERT:
1135                 // FIXME: These would probably make sense in math-text mode
1136                 flag.enabled(false);
1137                 break;
1138
1139         case LFUN_INSET_DISSOLVE:
1140                 flag.enabled(!asHullInset());
1141                 break;
1142
1143         default:
1144                 ret = false;
1145                 break;
1146         }
1147         return ret;
1148 }
1149
1150
1151 void InsetMathNest::edit(Cursor & cur, bool left)
1152 {
1153         cur.push(*this);
1154         cur.idx() = left ? 0 : cur.lastidx();
1155         cur.pos() = left ? 0 : cur.lastpos();
1156         cur.resetAnchor();
1157         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1158 }
1159
1160
1161 Inset * InsetMathNest::editXY(Cursor & cur, int x, int y)
1162 {
1163         int idx_min = 0;
1164         int dist_min = 1000000;
1165         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1166                 int const d = cell(i).dist(cur.bv(), x, y);
1167                 if (d < dist_min) {
1168                         dist_min = d;
1169                         idx_min = i;
1170                 }
1171         }
1172         MathData & ar = cell(idx_min);
1173         cur.push(*this);
1174         cur.idx() = idx_min;
1175         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1176
1177         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1178         if (dist_min == 0) {
1179                 // hit inside cell
1180                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1181                         if (ar[i]->covers(cur.bv(), x, y))
1182                                 return ar[i].nucleus()->editXY(cur, x, y);
1183         }
1184         return this;
1185 }
1186
1187
1188 void InsetMathNest::lfunMousePress(Cursor & cur, FuncRequest & cmd)
1189 {
1190         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1191         BufferView & bv = cur.bv();
1192         bool do_selection = cmd.button() == mouse_button::button1
1193                 && cmd.argument() == "region-select";
1194         bv.mouseSetCursor(cur, do_selection);
1195         if (cmd.button() == mouse_button::button1) {
1196                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1197                 // Update the cursor update flags as needed:
1198                 //
1199                 // Update::Decoration: tells to update the decoration
1200                 //                     (visual box corners that define
1201                 //                     the inset)/
1202                 // Update::FitCursor: adjust the screen to the cursor
1203                 //                    position if needed
1204                 // cur.result().update(): don't overwrite previously set flags.
1205                 cur.updateFlags(Update::Decoration | Update::FitCursor
1206                                 | cur.result().update());
1207         } else if (cmd.button() == mouse_button::button2) {
1208                 if (cap::selection()) {
1209                         // See comment in Text::dispatch why we do this
1210                         cap::copySelectionToStack();
1211                         cmd = FuncRequest(LFUN_PASTE, "0");
1212                         doDispatch(bv.cursor(), cmd);
1213                 } else {
1214                         MathData ar;
1215                         asArray(theSelection().get(), ar);
1216                         bv.cursor().insert(ar);
1217                 }
1218         }
1219 }
1220
1221
1222 void InsetMathNest::lfunMouseMotion(Cursor & cur, FuncRequest & cmd)
1223 {
1224         // only select with button 1
1225         if (cmd.button() == mouse_button::button1) {
1226                 Cursor & bvcur = cur.bv().cursor();
1227                 if (bvcur.anchor_.hasPart(cur)) {
1228                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1229                         bvcur.setCursor(cur);
1230                         bvcur.selection() = true;
1231                         //lyxerr << "MOTION " << bvcur << endl;
1232                 } else
1233                         cur.undispatched();
1234         }
1235 }
1236
1237
1238 void InsetMathNest::lfunMouseRelease(Cursor & cur, FuncRequest & cmd)
1239 {
1240         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1241
1242         if (cmd.button() == mouse_button::button1) {
1243                 if (!cur.selection())
1244                         cur.noUpdate();
1245                 else {
1246                         Cursor & bvcur = cur.bv().cursor();
1247                         bvcur.selection() = true;
1248                 }
1249                 return;
1250         }
1251
1252         cur.undispatched();
1253 }
1254
1255
1256 bool InsetMathNest::interpretChar(Cursor & cur, char_type c)
1257 {
1258         //lyxerr << "interpret 2: '" << c << "'" << endl;
1259         docstring save_selection;
1260         if (c == '^' || c == '_')
1261                 save_selection = grabAndEraseSelection(cur);
1262
1263         cur.clearTargetX();
1264
1265         // handle macroMode
1266         if (cur.inMacroMode()) {
1267                 docstring name = cur.macroName();
1268
1269                 /// are we currently typing '#1' or '#2' or...?
1270                 if (name == "\\#") {
1271                         cur.backspace();
1272                         int n = c - '0';
1273                         if (n >= 1 && n <= 9)
1274                                 cur.insert(new MathMacroArgument(n));
1275                         return true;
1276                 }
1277
1278                 if (isAlphaASCII(c)) {
1279                         cur.activeMacro()->setName(name + docstring(1, c));
1280                         return true;
1281                 }
1282
1283                 // handle 'special char' macros
1284                 if (name == "\\") {
1285                         // remove the '\\'
1286                         if (c == '\\') {
1287                                 cur.backspace();
1288                                 if (currentMode() == InsetMath::TEXT_MODE)
1289                                         cur.niceInsert(createInsetMath("textbackslash"));
1290                                 else
1291                                         cur.niceInsert(createInsetMath("backslash"));
1292                         } else if (c == '{') {
1293                                 cur.backspace();
1294                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1295                         } else if (c == '%') {
1296                                 cur.backspace();
1297                                 cur.niceInsert(MathAtom(new InsetMathComment));
1298                         } else if (c == '#') {
1299                                 BOOST_ASSERT(cur.activeMacro());
1300                                 cur.activeMacro()->setName(name + docstring(1, c));
1301                         } else {
1302                                 cur.backspace();
1303                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1304                         }
1305                         return true;
1306                 }
1307
1308                 // One character big delimiters. The others are handled in
1309                 // interpretString().
1310                 latexkeys const * l = in_word_set(name.substr(1));
1311                 if (name[0] == '\\' && l && l->inset == "big") {
1312                         docstring delim;
1313                         switch (c) {
1314                         case '{':
1315                                 delim = from_ascii("\\{");
1316                                 break;
1317                         case '}':
1318                                 delim = from_ascii("\\}");
1319                                 break;
1320                         default:
1321                                 delim = docstring(1, c);
1322                                 break;
1323                         }
1324                         if (InsetMathBig::isBigInsetDelim(delim)) {
1325                                 // name + delim ared a valid InsetMathBig.
1326                                 // We can't use cur.macroModeClose() because
1327                                 // it does not handle delim.
1328                                 InsetMathUnknown * p = cur.activeMacro();
1329                                 p->finalize();
1330                                 --cur.pos();
1331                                 cur.cell().erase(cur.pos());
1332                                 cur.plainInsert(MathAtom(
1333                                         new InsetMathBig(name.substr(1), delim)));
1334                                 return true;
1335                         }
1336                 }
1337
1338                 // leave macro mode and try again if necessary
1339                 cur.macroModeClose();
1340                 if (c == '{')
1341                         cur.niceInsert(MathAtom(new InsetMathBrace));
1342                 else if (c != ' ')
1343                         interpretChar(cur, c);
1344                 return true;
1345         }
1346
1347         // This is annoying as one has to press <space> far too often.
1348         // Disable it.
1349
1350 #if 0
1351                 // leave autocorrect mode if necessary
1352                 if (autocorrect() && c == ' ') {
1353                         autocorrect() = false;
1354                         return true;
1355                 }
1356 #endif
1357
1358         // just clear selection on pressing the space bar
1359         if (cur.selection() && c == ' ') {
1360                 cur.selection() = false;
1361                 return true;
1362         }
1363
1364         selClearOrDel(cur);
1365
1366         if (c == '\\') {
1367                 //lyxerr << "starting with macro" << endl;
1368                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1369                 return true;
1370         }
1371
1372         if (c == '\n') {
1373                 if (currentMode() == InsetMath::TEXT_MODE)
1374                         cur.insert(c);
1375                 return true;
1376         }
1377
1378         if (c == ' ') {
1379                 if (currentMode() == InsetMath::TEXT_MODE) {
1380                         // insert spaces in text mode,
1381                         // but suppress direct insertion of two spaces in a row
1382                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1383                         // it is better than nothing...
1384                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ') {
1385                                 cur.insert(c);
1386                                 // FIXME: we have to enable full redraw here because of the
1387                                 // visual box corners that define the inset. If we know for
1388                                 // sure that we stay within the same cell we can optimize for
1389                                 // that using:
1390                                 //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1391                         }
1392                         return true;
1393                 }
1394                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1395                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1396                         // FIXME: we have to enable full redraw here because of the
1397                         // visual box corners that define the inset. If we know for
1398                         // sure that we stay within the same cell we can optimize for
1399                         // that using:
1400                         //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1401                         return true;
1402                 }
1403
1404                 if (cur.popRight()) {
1405                         // FIXME: we have to enable full redraw here because of the
1406                         // visual box corners that define the inset. If we know for
1407                         // sure that we stay within the same cell we can optimize for
1408                         // that using:
1409                         //cur.updateFlags(Update::FitCursor);
1410                         return true;
1411                 }
1412
1413                 // if we are at the very end, leave the formula
1414                 return cur.pos() != cur.lastpos();
1415         }
1416
1417         // These shouldn't work in text mode:
1418         if (currentMode() != InsetMath::TEXT_MODE) {
1419                 if (c == '_') {
1420                         script(cur, false, save_selection);
1421                         return true;
1422                 }
1423                 if (c == '^') {
1424                         script(cur, true, save_selection);
1425                         return true;
1426                 }
1427                 if (c == '~') {
1428                         cur.niceInsert(createInsetMath("sim"));
1429                         return true;
1430                 }
1431         }
1432
1433         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1434             c == '%' || c == '_' || c == '^') {
1435                 cur.niceInsert(createInsetMath(docstring(1, c)));
1436                 return true;
1437         }
1438
1439
1440         // try auto-correction
1441         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1442         //      return true;
1443
1444         // no special circumstances, so insert the character without any fuss
1445         cur.insert(c);
1446         cur.autocorrect() = true;
1447         return true;
1448 }
1449
1450
1451 bool InsetMathNest::interpretString(Cursor & cur, docstring const & str)
1452 {
1453         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1454         // possible
1455         if (!cur.empty() && cur.pos() > 0 &&
1456             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1457                 if (InsetMathBig::isBigInsetDelim(str)) {
1458                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1459                         if (prev[0] == '\\') {
1460                                 prev = prev.substr(1);
1461                                 latexkeys const * l = in_word_set(prev);
1462                                 if (l && l->inset == "big") {
1463                                         cur.cell()[cur.pos() - 1] =
1464                                                 MathAtom(new InsetMathBig(prev, str));
1465                                         return true;
1466                                 }
1467                         }
1468                 }
1469         }
1470         return false;
1471 }
1472
1473
1474 bool InsetMathNest::script(Cursor & cur, bool up,
1475                 docstring const & save_selection)
1476 {
1477         // Hack to get \^ and \_ working
1478         //lyxerr << "handling script: up: " << up << endl;
1479         if (cur.inMacroMode() && cur.macroName() == "\\") {
1480                 if (up)
1481                         cur.niceInsert(createInsetMath("mathcircumflex"));
1482                 else
1483                         interpretChar(cur, '_');
1484                 return true;
1485         }
1486
1487         cur.macroModeClose();
1488         if (asScriptInset() && cur.idx() == 0) {
1489                 // we are in a nucleus of a script inset, move to _our_ script
1490                 InsetMathScript * inset = asScriptInset();
1491                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1492                 inset->ensure(up);
1493                 cur.idx() = inset->idxOfScript(up);
1494                 cur.pos() = 0;
1495         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1496                 --cur.pos();
1497                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1498                 cur.push(*inset);
1499                 inset->ensure(up);
1500                 cur.idx() = inset->idxOfScript(up);
1501                 cur.pos() = cur.lastpos();
1502         } else {
1503                 // convert the thing to our left to a scriptinset or create a new
1504                 // one if in the very first position of the array
1505                 if (cur.pos() == 0) {
1506                         //lyxerr << "new scriptinset" << endl;
1507                         cur.insert(new InsetMathScript(up));
1508                 } else {
1509                         //lyxerr << "converting prev atom " << endl;
1510                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1511                 }
1512                 --cur.pos();
1513                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1514                 // See comment in MathParser.cpp for special handling of {}-bases
1515
1516                 cur.push(*inset);
1517                 cur.idx() = 1;
1518                 cur.pos() = 0;
1519         }
1520         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1521         cur.niceInsert(save_selection);
1522         cur.resetAnchor();
1523         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1524         return true;
1525 }
1526
1527
1528 } // namespace lyx