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), 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                 cell(i).metrics(m);
 152 }
 153
 154
 155 bool InsetMathNest::idxNext(Cursor & cur) const
 156 {
 157         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 158         if (cur.idx() == cur.lastidx())
 159                 return false;
 160         ++cur.idx();
 161         cur.pos() = 0;
 162         return true;
 163 }
 164
 165
 166 bool InsetMathNest::idxRight(Cursor & cur) const
 167 {
 168         return idxNext(cur);
 169 }
 170
 171
 172 bool InsetMathNest::idxPrev(Cursor & cur) const
 173 {
 174         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 175         if (cur.idx() == 0)
 176                 return false;
 177         --cur.idx();
 178         cur.pos() = cur.lastpos();
 179         return true;
 180 }
 181
 182
 183 bool InsetMathNest::idxLeft(Cursor & cur) const
 184 {
 185         return idxPrev(cur);
 186 }
 187
 188
 189 bool InsetMathNest::idxFirst(Cursor & cur) const
 190 {
 191         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 192         if (nargs() == 0)
 193                 return false;
 194         cur.idx() = 0;
 195         cur.pos() = 0;
 196         return true;
 197 }
 198
 199
 200 bool InsetMathNest::idxLast(Cursor & cur) const
 201 {
 202         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 203         if (nargs() == 0)
 204                 return false;
 205         cur.idx() = cur.lastidx();
 206         cur.pos() = cur.lastpos();
 207         return true;
 208 }
 209
 210
 211 void InsetMathNest::dump() const
 212 {
 213         odocstringstream oss;
 214         WriteStream os(oss);
 215         os << "---------------------------------------------\n";
 216         write(os);
 217         os << "\n";
 218         for (idx_type i = 0, n = nargs(); i != n; ++i)
 219                 os << cell(i) << "\n";
 220         os << "---------------------------------------------\n";
 221         lyxerr << to_utf8(oss.str());
 222 }
 223
 224
 225 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 226 {
 227 #if 0
 228         if (lock_)
 229                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 230                                         Color::mathlockbg);
 231 #endif
 232         setPosCache(pi, x, y);
 233 }
 234
 235
 236 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 237 {
 238         BufferView & bv = *pi.base.bv;
 239         // this should use the x/y values given, not the cached values
 240         Cursor & cur = bv.cursor();
 241         if (!cur.selection())
 242                 return;
 243         if (!ptr_cmp(&cur.inset(), this))
 244                 return;
 245
 246         // FIXME: hack to get position cache warm
 247         pi.pain.setDrawingEnabled(false);
 248         draw(pi, x, y);
 249         pi.pain.setDrawingEnabled(true);
 250
 251         CursorSlice s1 = cur.selBegin();
 252         CursorSlice s2 = cur.selEnd();
 253
 254         //lyxerr << "InsetMathNest::drawing selection: "
 255         //      << " s1: " << s1 << " s2: " << s2 << endl;
 256         if (s1.idx() == s2.idx()) {
 257                 MathData const & c = cell(s1.idx());
 258                 int x1 = c.xo(bv) + c.pos2x(s1.pos());
 259                 int y1 = c.yo(bv) - c.ascent();
 260                 int x2 = c.xo(bv) + c.pos2x(s2.pos());
 261                 int y2 = c.yo(bv) + c.descent();
 262                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color::selection);
 263         //lyxerr << "InsetMathNest::drawing selection 3: "
 264         //      << " x1: " << x1 << " x2: " << x2
 265         //      << " y1: " << y1 << " y2: " << y2 << endl;
 266         } else {
 267                 for (idx_type i = 0; i < nargs(); ++i) {
 268                         if (idxBetween(i, s1.idx(), s2.idx())) {
 269                                 MathData const & c = cell(i);
 270                                 int x1 = c.xo(bv);
 271                                 int y1 = c.yo(bv) - c.ascent();
 272                                 int x2 = c.xo(bv) + c.width();
 273                                 int y2 = c.yo(bv) + c.descent();
 274                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color::selection);
 275                         }
 276                 }
 277         }
 278 }
 279
 280
 281 void InsetMathNest::validate(LaTeXFeatures & features) const
 282 {
 283         for (idx_type i = 0; i < nargs(); ++i)
 284                 cell(i).validate(features);
 285 }
 286
 287
 288 void InsetMathNest::replace(ReplaceData & rep)
 289 {
 290         for (idx_type i = 0; i < nargs(); ++i)
 291                 cell(i).replace(rep);
 292 }
 293
 294
 295 bool InsetMathNest::contains(MathData const & ar) const
 296 {
 297         for (idx_type i = 0; i < nargs(); ++i)
 298                 if (cell(i).contains(ar))
 299                         return true;
 300         return false;
 301 }
 302
 303
 304 bool InsetMathNest::lock() const
 305 {
 306         return lock_;
 307 }
 308
 309
 310 void InsetMathNest::lock(bool l)
 311 {
 312         lock_ = l;
 313 }
 314
 315
 316 bool InsetMathNest::isActive() const
 317 {
 318         return nargs() > 0;
 319 }
 320
 321
 322 MathData InsetMathNest::glue() const
 323 {
 324         MathData ar;
 325         for (size_t i = 0; i < nargs(); ++i)
 326                 ar.append(cell(i));
 327         return ar;
 328 }
 329
 330
 331 void InsetMathNest::write(WriteStream & os) const
 332 {
 333         os << '\\' << name().c_str();
 334         for (size_t i = 0; i < nargs(); ++i)
 335                 os << '{' << cell(i) << '}';
 336         if (nargs() == 0)
 337                 os.pendingSpace(true);
 338         if (lock_ && !os.latex()) {
 339                 os << "\\lyxlock";
 340                 os.pendingSpace(true);
 341         }
 342 }
 343
 344
 345 void InsetMathNest::normalize(NormalStream & os) const
 346 {
 347         os << '[' << name().c_str();
 348         for (size_t i = 0; i < nargs(); ++i)
 349                 os << ' ' << cell(i);
 350         os << ']';
 351 }
 352
 353
 354 int InsetMathNest::latex(Buffer const &, odocstream & os,
 355                         OutputParams const & runparams) const
 356 {
 357         WriteStream wi(os, runparams.moving_arg, true);
 358         write(wi);
 359         return wi.line();
 360 }
 361
 362
 363 bool InsetMathNest::setMouseHover(bool mouse_hover)
 364 {
 365         mouse_hover_ = mouse_hover;
 366         return true;
 367 }
 368
 369
 370 bool InsetMathNest::notifyCursorLeaves(Cursor & /*cur*/)
 371 {
 372 #ifdef WITH_WARNINGS
 373 #warning look here
 374 #endif
 375 #if 0
 376         MathData & ar = cur.cell();
 377         // remove base-only "scripts"
 378         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 379                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 380                 if (p && p->nargs() == 1) {
 381                         MathData ar = p->nuc();
 382                         erase(i);
 383                         insert(i, ar);
 384                         cur.adjust(i, ar.size() - 1);
 385                 }
 386         }
 387
 388         // glue adjacent font insets of the same kind
 389         for (pos_type i = 0; i + 1 < size(); ++i) {
 390                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 391                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 392                 if (p && q && p->name() == q->name()) {
 393                         p->cell(0).append(q->cell(0));
 394                         erase(i + 1);
 395                         cur.adjust(i, -1);
 396                 }
 397         }
 398 #endif
 399         return false;
 400 }
 401
 402
 403 void InsetMathNest::handleFont
 404         (Cursor & cur, docstring const & arg, char const * const font)
 405 {
 406         handleFont(cur, arg, from_ascii(font));
 407 }
 408
 409
 410 void InsetMathNest::handleFont
 411         (Cursor & cur, docstring const & arg, docstring const & font)
 412 {
 413         // this whole function is a hack and won't work for incremental font
 414         // changes...
 415
 416         if (cur.inset().asInsetMath()->name() == font) {
 417                 recordUndoInset(cur, Undo::ATOMIC);
 418                 cur.handleFont(to_utf8(font));
 419         } else {
 420                 recordUndo(cur, Undo::ATOMIC);
 421                 cur.handleNest(createInsetMath(font));
 422                 cur.insert(arg);
 423         }
 424 }
 425
 426
 427 void InsetMathNest::handleFont2(Cursor & cur, docstring const & arg)
 428 {
 429         recordUndo(cur, Undo::ATOMIC);
 430         Font font;
 431         bool b;
 432         bv_funcs::string2font(to_utf8(arg), font, b);
 433         if (font.color() != Color::inherit) {
 434                 MathAtom at = MathAtom(new InsetMathColor(true, font.color()));
 435                 cur.handleNest(at, 0);
 436         }
 437 }
 438
 439
 440 void InsetMathNest::doDispatch(Cursor & cur, FuncRequest & cmd)
 441 {
 442         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 443         //CursorSlice sl = cur.current();
 444
 445         switch (cmd.action) {
 446
 447         case LFUN_PASTE: {
 448                 recordUndo(cur);
 449                 cur.message(_("Paste"));
 450                 replaceSelection(cur);
 451                 docstring topaste;
 452                 if (cmd.argument().empty() && !theClipboard().isInternal())
 453                         topaste = theClipboard().getAsText();
 454                 else {
 455                         size_t n = 0;
 456                         idocstringstream is(cmd.argument());
 457                         is >> n;
 458                         topaste = cap::getSelection(cur.buffer(), n);
 459                 }
 460                 cur.niceInsert(topaste);
 461                 cur.clearSelection(); // bug 393
 462                 finishUndo();
 463                 break;
 464         }
 465
 466         case LFUN_CUT:
 467                 recordUndo(cur);
 468                 cutSelection(cur, true, true);
 469                 cur.message(_("Cut"));
 470                 // Prevent stale position >= size crash
 471                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 472                 cur.normalize();
 473                 break;
 474
 475         case LFUN_COPY:
 476                 copySelection(cur);
 477                 cur.message(_("Copy"));
 478                 break;
 479
 480         case LFUN_MOUSE_PRESS:
 481                 lfunMousePress(cur, cmd);
 482                 break;
 483
 484         case LFUN_MOUSE_MOTION:
 485                 lfunMouseMotion(cur, cmd);
 486                 break;
 487
 488         case LFUN_MOUSE_RELEASE:
 489                 lfunMouseRelease(cur, cmd);
 490                 break;
 491
 492         case LFUN_FINISHED_LEFT:
 493                 cur.bv().cursor() = cur;
 494                 break;
 495
 496         case LFUN_FINISHED_RIGHT:
 497                 ++cur.pos();
 498                 cur.bv().cursor() = cur;
 499                 break;
 500
 501         case LFUN_CHAR_FORWARD:
 502                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 503         case LFUN_CHAR_FORWARD_SELECT:
 504                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 505                 cur.autocorrect() = false;
 506                 cur.clearTargetX();
 507                 cur.macroModeClose();
 508                 if (reverseDirectionNeeded(cur))
 509                         goto goto_char_backwards;
 510
 511 goto_char_forwards:
 512                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 513                         cur.pushLeft(*cur.nextAtom().nucleus());
 514                         cur.inset().idxFirst(cur);
 515                 } else if (cur.posRight() || idxRight(cur)
 516                         || cur.popRight() || cur.selection())
 517                         ;
 518                 else {
 519                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 520                         cur.undispatched();
 521                 }
 522                 break;
 523
 524         case LFUN_CHAR_BACKWARD:
 525                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 526         case LFUN_CHAR_BACKWARD_SELECT:
 527                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 528                 cur.autocorrect() = false;
 529                 cur.clearTargetX();
 530                 cur.macroModeClose();
 531                 if (reverseDirectionNeeded(cur))
 532                         goto goto_char_forwards;
 533
 534 goto_char_backwards:
 535                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 536                         cur.posLeft();
 537                         cur.push(*cur.nextAtom().nucleus());
 538                         cur.inset().idxLast(cur);
 539                 } else if (cur.posLeft() || idxLeft(cur)
 540                         || cur.popLeft() || cur.selection())
 541                         ;
 542                 else {
 543                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 544                         cur.undispatched();
 545                 }
 546                 break;
 547
 548         case LFUN_DOWN:
 549         case LFUN_UP:
 550                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 551         case LFUN_DOWN_SELECT:
 552         case LFUN_UP_SELECT: {
 553                 // close active macro
 554                 if (cur.inMacroMode()) {
 555                         cur.macroModeClose();
 556                         break;
 557                 }
 558
 559                 // stop/start the selection
 560                 bool select = cmd.action == LFUN_DOWN_SELECT ||
 561                         cmd.action == LFUN_UP_SELECT;
 562                 cur.selHandle(select);
 563
 564                 // go up/down
 565                 bool up = cmd.action == LFUN_UP || cmd.action == LFUN_UP_SELECT;
 566                 bool successful = cur.upDownInMath(up);
 567                 if (successful) {
 568                         // notify left insets and give them chance to set update flags
 569                         lyx::notifyCursorLeaves(cur.beforeDispatchCursor(), cur);
 570                         cur.fixIfBroken();
 571                 }       else
 572                         cur.undispatched();
 573                 break;
 574         }
 575
 576         case LFUN_MOUSE_DOUBLE:
 577         case LFUN_MOUSE_TRIPLE:
 578         case LFUN_WORD_SELECT:
 579                 cur.pos() = 0;
 580                 cur.idx() = 0;
 581                 cur.resetAnchor();
 582                 cur.selection() = true;
 583                 cur.pos() = cur.lastpos();
 584                 cur.idx() = cur.lastidx();
 585                 cap::saveSelection(cur);
 586                 break;
 587
 588         case LFUN_PARAGRAPH_UP:
 589         case LFUN_PARAGRAPH_DOWN:
 590                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 591         case LFUN_PARAGRAPH_UP_SELECT:
 592         case LFUN_PARAGRAPH_DOWN_SELECT:
 593                 break;
 594
 595         case LFUN_LINE_BEGIN:
 596         case LFUN_WORD_BACKWARD:
 597                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 598         case LFUN_LINE_BEGIN_SELECT:
 599         case LFUN_WORD_BACKWARD_SELECT:
 600                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 601                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 602                 cur.macroModeClose();
 603                 if (cur.pos() != 0) {
 604                         cur.pos() = 0;
 605                 } else if (cur.col() != 0) {
 606                         cur.idx() -= cur.col();
 607                         cur.pos() = 0;
 608                 } else if (cur.idx() != 0) {
 609                         cur.idx() = 0;
 610                         cur.pos() = 0;
 611                 } else {
 612                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 613                         cur.undispatched();
 614                 }
 615                 break;
 616
 617         case LFUN_WORD_FORWARD:
 618         case LFUN_LINE_END:
 619                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 620         case LFUN_WORD_FORWARD_SELECT:
 621         case LFUN_LINE_END_SELECT:
 622                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 623                                 cmd.action == LFUN_LINE_END_SELECT);
 624                 cur.macroModeClose();
 625                 cur.clearTargetX();
 626                 if (cur.pos() != cur.lastpos()) {
 627                         cur.pos() = cur.lastpos();
 628                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 629                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 630                         cur.pos() = cur.lastpos();
 631                 } else if (cur.idx() != cur.lastidx()) {
 632                         cur.idx() = cur.lastidx();
 633                         cur.pos() = cur.lastpos();
 634                 } else {
 635                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 636                         cur.undispatched();
 637                 }
 638                 break;
 639
 640         case LFUN_SCREEN_UP_SELECT:
 641         case LFUN_SCREEN_UP:
 642                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 643                 cur.undispatched();
 644                 break;
 645
 646         case LFUN_SCREEN_DOWN_SELECT:
 647         case LFUN_SCREEN_DOWN:
 648                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 649                 cur.undispatched();
 650                 break;
 651
 652         case LFUN_CELL_FORWARD:
 653                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 654                 cur.inset().idxNext(cur);
 655                 break;
 656
 657         case LFUN_CELL_BACKWARD:
 658                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 659                 cur.inset().idxPrev(cur);
 660                 break;
 661
 662         case LFUN_WORD_DELETE_BACKWARD:
 663         case LFUN_CHAR_DELETE_BACKWARD:
 664                 if (cur.pos() == 0)
 665                         // May affect external cell:
 666                         recordUndoInset(cur, Undo::ATOMIC);
 667                 else
 668                         recordUndo(cur, Undo::ATOMIC);
 669                 // if the inset can not be removed from within, delete it
 670                 if (!cur.backspace()) {
 671                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 672                         cur.innerText()->dispatch(cur, cmd);
 673                 }
 674                 break;
 675
 676         case LFUN_WORD_DELETE_FORWARD:
 677         case LFUN_CHAR_DELETE_FORWARD:
 678                 if (cur.pos() == cur.lastpos())
 679                         // May affect external cell:
 680                         recordUndoInset(cur, Undo::ATOMIC);
 681                 else
 682                         recordUndo(cur, Undo::ATOMIC);
 683                 // if the inset can not be removed from within, delete it
 684                 if (!cur.erase()) {
 685                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 686                         cur.innerText()->dispatch(cur, cmd);
 687                 }
 688                 break;
 689
 690         case LFUN_ESCAPE:
 691                 if (cur.selection())
 692                         cur.clearSelection();
 693                 else  {
 694                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 695                         cur.undispatched();
 696                 }
 697                 break;
 698
 699         case LFUN_INSET_TOGGLE:
 700                 recordUndo(cur);
 701                 lock(!lock());
 702                 cur.popRight();
 703                 break;
 704
 705         case LFUN_SELF_INSERT:
 706                 if (cmd.argument().size() != 1) {
 707                         recordUndo(cur);
 708                         docstring const arg = cmd.argument();
 709                         if (!interpretString(cur, arg))
 710                                 cur.insert(arg);
 711                         break;
 712                 }
 713                 // Don't record undo steps if we are in macro mode and
 714                 // cmd.argument is the next character of the macro name.
 715                 // Otherwise we'll get an invalid cursor if we undo after
 716                 // the macro was finished and the macro is a known command,
 717                 // e.g. sqrt. Cursor::macroModeClose replaces in this case
 718                 // the InsetMathUnknown with name "frac" by an empty
 719                 // InsetMathFrac -> a pos value > 0 is invalid.
 720                 // A side effect is that an undo before the macro is finished
 721                 // undoes the complete macro, not only the last character.
 722                 if (!cur.inMacroMode())
 723                         recordUndo(cur);
 724
 725                 // spacial handling of space. If we insert an inset
 726                 // via macro mode, we want to put the cursor inside it
 727                 // if relevant. Think typing "\frac<space>".
 728                 if (cmd.argument()[0] == ' '
 729                     && cur.inMacroMode() && cur.macroName() != "\\"
 730                     && cur.macroModeClose()) {
 731                         MathAtom const atom = cur.prevAtom();
 732                         if (atom->asNestInset() && atom->isActive()) {
 733                                 cur.posLeft();
 734                                 cur.pushLeft(*cur.nextInset());
 735                         }
 736                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 737                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 738                         cur.undispatched();
 739                 }
 740                 break;
 741
 742         //case LFUN_SERVER_GET_XY:
 743         //      sprintf(dispatch_buffer, "%d %d",);
 744         //      break;
 745
 746         case LFUN_SERVER_SET_XY: {
 747                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 748                 int x = 0;
 749                 int y = 0;
 750                 istringstream is(to_utf8(cmd.argument()));
 751                 is >> x >> y;
 752                 cur.setScreenPos(x, y);
 753                 break;
 754         }
 755
 756         // Special casing for superscript in case of LyX handling
 757         // dead-keys:
 758         case LFUN_ACCENT_CIRCUMFLEX:
 759                 if (cmd.argument().empty()) {
 760                         // do superscript if LyX handles
 761                         // deadkeys
 762                         recordUndo(cur, Undo::ATOMIC);
 763                         script(cur, true, grabAndEraseSelection(cur));
 764                 }
 765                 break;
 766
 767         case LFUN_ACCENT_UMLAUT:
 768         case LFUN_ACCENT_ACUTE:
 769         case LFUN_ACCENT_GRAVE:
 770         case LFUN_ACCENT_BREVE:
 771         case LFUN_ACCENT_DOT:
 772         case LFUN_ACCENT_MACRON:
 773         case LFUN_ACCENT_CARON:
 774         case LFUN_ACCENT_TILDE:
 775         case LFUN_ACCENT_CEDILLA:
 776         case LFUN_ACCENT_CIRCLE:
 777         case LFUN_ACCENT_UNDERDOT:
 778         case LFUN_ACCENT_TIE:
 779         case LFUN_ACCENT_OGONEK:
 780         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 781                 break;
 782
 783         //  Math fonts
 784         case LFUN_FONT_FREE_APPLY:
 785         case LFUN_FONT_FREE_UPDATE:
 786                 handleFont2(cur, cmd.argument());
 787                 break;
 788
 789         case LFUN_FONT_BOLD:
 790                 if (currentMode() == TEXT_MODE)
 791                         handleFont(cur, cmd.argument(), "textbf");
 792                 else
 793                         handleFont(cur, cmd.argument(), "mathbf");
 794                 break;
 795         case LFUN_FONT_SANS:
 796                 if (currentMode() == TEXT_MODE)
 797                         handleFont(cur, cmd.argument(), "textsf");
 798                 else
 799                         handleFont(cur, cmd.argument(), "mathsf");
 800                 break;
 801         case LFUN_FONT_EMPH:
 802                 if (currentMode() == TEXT_MODE)
 803                         handleFont(cur, cmd.argument(), "emph");
 804                 else
 805                         handleFont(cur, cmd.argument(), "mathcal");
 806                 break;
 807         case LFUN_FONT_ROMAN:
 808                 if (currentMode() == TEXT_MODE)
 809                         handleFont(cur, cmd.argument(), "textrm");
 810                 else
 811                         handleFont(cur, cmd.argument(), "mathrm");
 812                 break;
 813         case LFUN_FONT_CODE:
 814                 if (currentMode() == TEXT_MODE)
 815                         handleFont(cur, cmd.argument(), "texttt");
 816                 else
 817                         handleFont(cur, cmd.argument(), "mathtt");
 818                 break;
 819         case LFUN_FONT_FRAK:
 820                 handleFont(cur, cmd.argument(), "mathfrak");
 821                 break;
 822         case LFUN_FONT_ITAL:
 823                 if (currentMode() == TEXT_MODE)
 824                         handleFont(cur, cmd.argument(), "textit");
 825                 else
 826                         handleFont(cur, cmd.argument(), "mathit");
 827                 break;
 828         case LFUN_FONT_NOUN:
 829                 if (currentMode() == TEXT_MODE)
 830                         // FIXME: should be "noun"
 831                         handleFont(cur, cmd.argument(), "textsc");
 832                 else
 833                         handleFont(cur, cmd.argument(), "mathbb");
 834                 break;
 835         /*
 836         case LFUN_FONT_FREE_APPLY:
 837                 handleFont(cur, cmd.argument(), "textrm");
 838                 break;
 839         */
 840         case LFUN_FONT_DEFAULT:
 841                 handleFont(cur, cmd.argument(), "textnormal");
 842                 break;
 843
 844         case LFUN_MATH_MODE: {
 845 #if 1
 846                 // ignore math-mode on when already in math mode
 847                 if (currentMode() == Inset::MATH_MODE && cmd.argument() == "on")
 848                         break;
 849                 cur.macroModeClose();
 850                 docstring const save_selection = grabAndEraseSelection(cur);
 851                 selClearOrDel(cur);
 852                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 853                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 854                 cur.posLeft();
 855                 cur.pushLeft(*cur.nextInset());
 856                 cur.niceInsert(save_selection);
 857 #else
 858                 if (currentMode() == Inset::TEXT_MODE) {
 859                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 860                         cur.message(_("create new math text environment ($...$)"));
 861                 } else {
 862                         handleFont(cur, cmd.argument(), "textrm");
 863                         cur.message(_("entered math text mode (textrm)"));
 864                 }
 865 #endif
 866                 break;
 867         }
 868
 869         case LFUN_MATH_SIZE:
 870 #if 0
 871                 recordUndo(cur);
 872                 cur.setSize(arg);
 873 #endif
 874                 break;
 875
 876         case LFUN_MATH_MATRIX: {
 877                 recordUndo(cur, Undo::ATOMIC);
 878                 unsigned int m = 1;
 879                 unsigned int n = 1;
 880                 docstring v_align;
 881                 docstring h_align;
 882                 idocstringstream is(cmd.argument());
 883                 is >> m >> n >> v_align >> h_align;
 884                 if (m < 1)
 885                         m = 1;
 886                 if (n < 1)
 887                         n = 1;
 888                 v_align += 'c';
 889                 cur.niceInsert(
 890                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 891                 break;
 892         }
 893
 894         case LFUN_MATH_DELIM: {
 895                 docstring ls;
 896                 docstring rs = support::split(cmd.argument(), ls, ' ');
 897                 // Reasonable default values
 898                 if (ls.empty())
 899                         ls = '(';
 900                 if (rs.empty())
 901                         rs = ')';
 902                 recordUndo(cur, Undo::ATOMIC);
 903                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 904                 break;
 905         }
 906
 907         case LFUN_MATH_BIGDELIM: {
 908                 docstring const lname  = from_utf8(cmd.getArg(0));
 909                 docstring const ldelim = from_utf8(cmd.getArg(1));
 910                 docstring const rname  = from_utf8(cmd.getArg(2));
 911                 docstring const rdelim = from_utf8(cmd.getArg(3));
 912                 latexkeys const * l = in_word_set(lname);
 913                 bool const have_l = l && l->inset == "big" &&
 914                                     InsetMathBig::isBigInsetDelim(ldelim);
 915                 l = in_word_set(rname);
 916                 bool const have_r = l && l->inset == "big" &&
 917                                     InsetMathBig::isBigInsetDelim(rdelim);
 918                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 919                 // or right delimiter.
 920                 if (have_l || have_r) {
 921                         recordUndo(cur, Undo::ATOMIC);
 922                         docstring const selection = grabAndEraseSelection(cur);
 923                         selClearOrDel(cur);
 924                         if (have_l)
 925                                 cur.insert(MathAtom(new InsetMathBig(lname,
 926                                                                 ldelim)));
 927                         cur.niceInsert(selection);
 928                         if (have_r)
 929                                 cur.insert(MathAtom(new InsetMathBig(rname,
 930                                                                 rdelim)));
 931                 }
 932                 // Don't call cur.undispatched() if we did nothing, this would
 933                 // lead to infinite recursion via Text::dispatch().
 934                 break;
 935         }
 936
 937         case LFUN_SPACE_INSERT:
 938         case LFUN_MATH_SPACE:
 939                 recordUndo(cur, Undo::ATOMIC);
 940                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 941                 break;
 942
 943         case LFUN_ERT_INSERT:
 944                 // interpret this as if a backslash was typed
 945                 recordUndo(cur, Undo::ATOMIC);
 946                 interpretChar(cur, '\\');
 947                 break;
 948
 949         case LFUN_MATH_SUBSCRIPT:
 950                 // interpret this as if a _ was typed
 951                 recordUndo(cur, Undo::ATOMIC);
 952                 interpretChar(cur, '_');
 953                 break;
 954
 955         case LFUN_MATH_SUPERSCRIPT:
 956                 // interpret this as if a ^ was typed
 957                 recordUndo(cur, Undo::ATOMIC);
 958                 interpretChar(cur, '^');
 959                 break;
 960
 961         case LFUN_QUOTE_INSERT:
 962                 // interpret this as if a straight " was typed
 963                 recordUndo(cur, Undo::ATOMIC);
 964                 interpretChar(cur, '\"');
 965                 break;
 966
 967 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 968 // handling such that "self-insert" works on "arbitrary stuff" too, and
 969 // math-insert only handles special math things like "matrix".
 970         case LFUN_MATH_INSERT: {
 971                 recordUndo(cur, Undo::ATOMIC);
 972                 if (cmd.argument() == "^" || cmd.argument() == "_") {
 973                         interpretChar(cur, cmd.argument()[0]);
 974                 } else
 975                         cur.niceInsert(cmd.argument());
 976                 break;
 977                 }
 978
 979         case LFUN_DIALOG_SHOW_NEW_INSET: {
 980                 docstring const & name = cmd.argument();
 981                 string data;
 982                 if (name == "ref") {
 983                         InsetMathRef tmp(name);
 984                         data = tmp.createDialogStr(to_utf8(name));
 985                 }
 986                 cur.bv().showInsetDialog(to_utf8(name), data, 0);
 987                 break;
 988         }
 989
 990         case LFUN_INSET_INSERT: {
 991                 MathData ar;
 992                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
 993                         recordUndo(cur);
 994                         cur.insert(ar);
 995                 } else
 996                         cur.undispatched();
 997                 break;
 998         }
 999
1000         default:
1001                 InsetMath::doDispatch(cur, cmd);
1002                 break;
1003         }
1004 }
1005
1006
1007 bool InsetMathNest::getStatus(Cursor & cur, FuncRequest const & cmd,
1008                 FuncStatus & flag) const
1009 {
1010         // the font related toggles
1011         //string tc = "mathnormal";
1012         bool ret = true;
1013         string const arg = to_utf8(cmd.argument());
1014         switch (cmd.action) {
1015         case LFUN_TABULAR_FEATURE:
1016                 flag.enabled(false);
1017                 break;
1018 #if 0
1019         case LFUN_TABULAR_FEATURE:
1020                 // FIXME: check temporarily disabled
1021                 // valign code
1022                 char align = mathcursor::valign();
1023                 if (align == '\0') {
1024                         enable = false;
1025                         break;
1026                 }
1027                 if (cmd.argument().empty()) {
1028                         flag.clear();
1029                         break;
1030                 }
1031                 if (!contains("tcb", cmd.argument()[0])) {
1032                         enable = false;
1033                         break;
1034                 }
1035                 flag.setOnOff(cmd.argument()[0] == align);
1036                 break;
1037 #endif
1038         /// We have to handle them since 1.4 blocks all unhandled actions
1039         case LFUN_FONT_ITAL:
1040         case LFUN_FONT_BOLD:
1041         case LFUN_FONT_SANS:
1042         case LFUN_FONT_EMPH:
1043         case LFUN_FONT_CODE:
1044         case LFUN_FONT_NOUN:
1045         case LFUN_FONT_ROMAN:
1046         case LFUN_FONT_DEFAULT:
1047                 flag.enabled(true);
1048                 break;
1049         case LFUN_MATH_MUTATE:
1050                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1051                 flag.setOnOff(false);
1052                 break;
1053
1054         // we just need to be in math mode to enable that
1055         case LFUN_MATH_SIZE:
1056         case LFUN_MATH_SPACE:
1057         case LFUN_MATH_LIMITS:
1058         case LFUN_MATH_NONUMBER:
1059         case LFUN_MATH_NUMBER:
1060         case LFUN_MATH_EXTERN:
1061                 flag.enabled(true);
1062                 break;
1063
1064         case LFUN_FONT_FRAK:
1065                 flag.enabled(currentMode() != TEXT_MODE);
1066                 break;
1067
1068         case LFUN_MATH_INSERT: {
1069                 bool const textarg =
1070                         arg == "\\textbf"   || arg == "\\textsf" ||
1071                         arg == "\\textrm"   || arg == "\\textmd" ||
1072                         arg == "\\textit"   || arg == "\\textsc" ||
1073                         arg == "\\textsl"   || arg == "\\textup" ||
1074                         arg == "\\texttt"   || arg == "\\textbb" ||
1075                         arg == "\\textnormal";
1076                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1077                 break;
1078         }
1079
1080         case LFUN_MATH_MATRIX:
1081                 flag.enabled(currentMode() == MATH_MODE);
1082                 break;
1083
1084         case LFUN_INSET_INSERT: {
1085                 // Don't test createMathInset_fromDialogStr(), since
1086                 // getStatus is not called with a valid reference and the
1087                 // dialog would not be applyable.
1088                 string const name = cmd.getArg(0);
1089                 flag.enabled(name == "ref");
1090                 break;
1091         }
1092
1093         case LFUN_MATH_DELIM:
1094         case LFUN_MATH_BIGDELIM:
1095                 // Don't do this with multi-cell selections
1096                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1097                 break;
1098
1099         case LFUN_HYPHENATION_POINT_INSERT:
1100         case LFUN_LIGATURE_BREAK_INSERT:
1101         case LFUN_MENU_SEPARATOR_INSERT:
1102         case LFUN_DOTS_INSERT:
1103         case LFUN_END_OF_SENTENCE_PERIOD_INSERT:
1104                 // FIXME: These would probably make sense in math-text mode
1105                 flag.enabled(false);
1106                 break;
1107
1108         default:
1109                 ret = false;
1110                 break;
1111         }
1112         return ret;
1113 }
1114
1115
1116 void InsetMathNest::edit(Cursor & cur, bool left)
1117 {
1118         cur.push(*this);
1119         cur.idx() = left ? 0 : cur.lastidx();
1120         cur.pos() = left ? 0 : cur.lastpos();
1121         cur.resetAnchor();
1122         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1123 }
1124
1125
1126 Inset * InsetMathNest::editXY(Cursor & cur, int x, int y)
1127 {
1128         int idx_min = 0;
1129         int dist_min = 1000000;
1130         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1131                 int const d = cell(i).dist(cur.bv(), x, y);
1132                 if (d < dist_min) {
1133                         dist_min = d;
1134                         idx_min = i;
1135                 }
1136         }
1137         MathData & ar = cell(idx_min);
1138         cur.push(*this);
1139         cur.idx() = idx_min;
1140         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1141
1142         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1143         if (dist_min == 0) {
1144                 // hit inside cell
1145                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1146                         if (ar[i]->covers(cur.bv(), x, y))
1147                                 return ar[i].nucleus()->editXY(cur, x, y);
1148         }
1149         return this;
1150 }
1151
1152
1153 void InsetMathNest::lfunMousePress(Cursor & cur, FuncRequest & cmd)
1154 {
1155         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1156         BufferView & bv = cur.bv();
1157         if (cmd.button() == mouse_button::button1) {
1158                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1159                 bv.mouseSetCursor(cur);
1160                 // Update the cursor update flags as needed:
1161                 //
1162                 // Update::Decoration: tells to update the decoration (visual box
1163                 //                     corners that define the inset)/
1164                 // Update::FitCursor: adjust the screen to the cursor position if
1165                 //                    needed
1166                 // cur.result().update(): don't overwrite previously set flags.
1167                 cur.updateFlags(Update::Decoration | Update::FitCursor | cur.result().update());
1168         } else if (cmd.button() == mouse_button::button2) {
1169                 MathData ar;
1170                 if (cap::selection()) {
1171                         // See comment in Text::dispatch why we do this
1172                         cap::copySelectionToStack();
1173                         cmd = FuncRequest(LFUN_PASTE, "0");
1174                         doDispatch(cur, cmd);
1175                 } else
1176                         asArray(theSelection().get(), ar);
1177
1178                 cur.insert(ar);
1179                 bv.mouseSetCursor(cur);
1180         }
1181 }
1182
1183
1184 void InsetMathNest::lfunMouseMotion(Cursor & cur, FuncRequest & cmd)
1185 {
1186         // only select with button 1
1187         if (cmd.button() == mouse_button::button1) {
1188                 Cursor & bvcur = cur.bv().cursor();
1189                 if (bvcur.anchor_.hasPart(cur)) {
1190                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1191                         bvcur.setCursor(cur);
1192                         bvcur.selection() = true;
1193                         //lyxerr << "MOTION " << bvcur << endl;
1194                 } else
1195                         cur.undispatched();
1196         }
1197 }
1198
1199
1200 void InsetMathNest::lfunMouseRelease(Cursor & cur, FuncRequest & cmd)
1201 {
1202         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1203
1204         if (cmd.button() == mouse_button::button1) {
1205                 if (!cur.selection())
1206                         cur.noUpdate();
1207                 else {
1208                         Cursor & bvcur = cur.bv().cursor();
1209                         bvcur.selection() = true;
1210                         cap::saveSelection(bvcur);
1211                 }
1212                 return;
1213         }
1214
1215         cur.undispatched();
1216 }
1217
1218
1219 bool InsetMathNest::interpretChar(Cursor & cur, char_type c)
1220 {
1221         //lyxerr << "interpret 2: '" << c << "'" << endl;
1222         docstring save_selection;
1223         if (c == '^' || c == '_')
1224                 save_selection = grabAndEraseSelection(cur);
1225
1226         cur.clearTargetX();
1227
1228         // handle macroMode
1229         if (cur.inMacroMode()) {
1230                 docstring name = cur.macroName();
1231
1232                 /// are we currently typing '#1' or '#2' or...?
1233                 if (name == "\\#") {
1234                         cur.backspace();
1235                         int n = c - '0';
1236                         if (n >= 1 && n <= 9)
1237                                 cur.insert(new MathMacroArgument(n));
1238                         return true;
1239                 }
1240
1241                 if (isAlphaASCII(c)) {
1242                         cur.activeMacro()->setName(name + docstring(1, c));
1243                         return true;
1244                 }
1245
1246                 // handle 'special char' macros
1247                 if (name == "\\") {
1248                         // remove the '\\'
1249                         if (c == '\\') {
1250                                 cur.backspace();
1251                                 if (currentMode() == InsetMath::TEXT_MODE)
1252                                         cur.niceInsert(createInsetMath("textbackslash"));
1253                                 else
1254                                         cur.niceInsert(createInsetMath("backslash"));
1255                         } else if (c == '{') {
1256                                 cur.backspace();
1257                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1258                         } else if (c == '%') {
1259                                 cur.backspace();
1260                                 cur.niceInsert(MathAtom(new InsetMathComment));
1261                         } else if (c == '#') {
1262                                 BOOST_ASSERT(cur.activeMacro());
1263                                 cur.activeMacro()->setName(name + docstring(1, c));
1264                         } else {
1265                                 cur.backspace();
1266                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1267                         }
1268                         return true;
1269                 }
1270
1271                 // One character big delimiters. The others are handled in
1272                 // interpretString().
1273                 latexkeys const * l = in_word_set(name.substr(1));
1274                 if (name[0] == '\\' && l && l->inset == "big") {
1275                         docstring delim;
1276                         switch (c) {
1277                         case '{':
1278                                 delim = from_ascii("\\{");
1279                                 break;
1280                         case '}':
1281                                 delim = from_ascii("\\}");
1282                                 break;
1283                         default:
1284                                 delim = docstring(1, c);
1285                                 break;
1286                         }
1287                         if (InsetMathBig::isBigInsetDelim(delim)) {
1288                                 // name + delim ared a valid InsetMathBig.
1289                                 // We can't use cur.macroModeClose() because
1290                                 // it does not handle delim.
1291                                 InsetMathUnknown * p = cur.activeMacro();
1292                                 p->finalize();
1293                                 --cur.pos();
1294                                 cur.cell().erase(cur.pos());
1295                                 cur.plainInsert(MathAtom(
1296                                         new InsetMathBig(name.substr(1), delim)));
1297                                 return true;
1298                         }
1299                 }
1300
1301                 // leave macro mode and try again if necessary
1302                 cur.macroModeClose();
1303                 if (c == '{')
1304                         cur.niceInsert(MathAtom(new InsetMathBrace));
1305                 else if (c != ' ')
1306                         interpretChar(cur, c);
1307                 return true;
1308         }
1309
1310         // This is annoying as one has to press <space> far too often.
1311         // Disable it.
1312
1313 #if 0
1314                 // leave autocorrect mode if necessary
1315                 if (autocorrect() && c == ' ') {
1316                         autocorrect() = false;
1317                         return true;
1318                 }
1319 #endif
1320
1321         // just clear selection on pressing the space bar
1322         if (cur.selection() && c == ' ') {
1323                 cur.selection() = false;
1324                 return true;
1325         }
1326
1327         selClearOrDel(cur);
1328
1329         if (c == '\\') {
1330                 //lyxerr << "starting with macro" << endl;
1331                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1332                 return true;
1333         }
1334
1335         if (c == '\n') {
1336                 if (currentMode() == InsetMath::TEXT_MODE)
1337                         cur.insert(c);
1338                 return true;
1339         }
1340
1341         if (c == ' ') {
1342                 if (currentMode() == InsetMath::TEXT_MODE) {
1343                         // insert spaces in text mode,
1344                         // but suppress direct insertion of two spaces in a row
1345                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1346                         // it is better than nothing...
1347                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ') {
1348                                 cur.insert(c);
1349                                 // FIXME: we have to enable full redraw here because of the
1350                                 // visual box corners that define the inset. If we know for
1351                                 // sure that we stay within the same cell we can optimize for
1352                                 // that using:
1353                                 //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1354                         }
1355                         return true;
1356                 }
1357                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1358                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1359                         // FIXME: we have to enable full redraw here because of the
1360                         // visual box corners that define the inset. If we know for
1361                         // sure that we stay within the same cell we can optimize for
1362                         // that using:
1363                         //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1364                         return true;
1365                 }
1366
1367                 if (cur.popRight()) {
1368                         // FIXME: we have to enable full redraw here because of the
1369                         // visual box corners that define the inset. If we know for
1370                         // sure that we stay within the same cell we can optimize for
1371                         // that using:
1372                         //cur.updateFlags(Update::FitCursor);
1373                         return true;
1374                 }
1375
1376                 // if we are at the very end, leave the formula
1377                 return cur.pos() != cur.lastpos();
1378         }
1379
1380         // These shouldn't work in text mode:
1381         if (currentMode() != InsetMath::TEXT_MODE) {
1382                 if (c == '_') {
1383                         script(cur, false, save_selection);
1384                         return true;
1385                 }
1386                 if (c == '^') {
1387                         script(cur, true, save_selection);
1388                         return true;
1389                 }
1390                 if (c == '~') {
1391                         cur.niceInsert(createInsetMath("sim"));
1392                         return true;
1393                 }
1394         }
1395
1396         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1397             c == '%' || c == '_' || c == '^') {
1398                 cur.niceInsert(createInsetMath(docstring(1, c)));
1399                 return true;
1400         }
1401
1402
1403         // try auto-correction
1404         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1405         //      return true;
1406
1407         // no special circumstances, so insert the character without any fuss
1408         cur.insert(c);
1409         cur.autocorrect() = true;
1410         return true;
1411 }
1412
1413
1414 bool InsetMathNest::interpretString(Cursor & cur, docstring const & str)
1415 {
1416         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1417         // possible
1418         if (!cur.empty() && cur.pos() > 0 &&
1419             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1420                 if (InsetMathBig::isBigInsetDelim(str)) {
1421                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1422                         if (prev[0] == '\\') {
1423                                 prev = prev.substr(1);
1424                                 latexkeys const * l = in_word_set(prev);
1425                                 if (l && l->inset == "big") {
1426                                         cur.cell()[cur.pos() - 1] =
1427                                                 MathAtom(new InsetMathBig(prev, str));
1428                                         return true;
1429                                 }
1430                         }
1431                 }
1432         }
1433         return false;
1434 }
1435
1436
1437 bool InsetMathNest::script(Cursor & cur, bool up,
1438                 docstring const & save_selection)
1439 {
1440         // Hack to get \^ and \_ working
1441         //lyxerr << "handling script: up: " << up << endl;
1442         if (cur.inMacroMode() && cur.macroName() == "\\") {
1443                 if (up)
1444                         cur.niceInsert(createInsetMath("mathcircumflex"));
1445                 else
1446                         interpretChar(cur, '_');
1447                 return true;
1448         }
1449
1450         cur.macroModeClose();
1451         if (asScriptInset() && cur.idx() == 0) {
1452                 // we are in a nucleus of a script inset, move to _our_ script
1453                 InsetMathScript * inset = asScriptInset();
1454                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1455                 inset->ensure(up);
1456                 cur.idx() = inset->idxOfScript(up);
1457                 cur.pos() = 0;
1458         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1459                 --cur.pos();
1460                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1461                 cur.push(*inset);
1462                 inset->ensure(up);
1463                 cur.idx() = inset->idxOfScript(up);
1464                 cur.pos() = cur.lastpos();
1465         } else {
1466                 // convert the thing to our left to a scriptinset or create a new
1467                 // one if in the very first position of the array
1468                 if (cur.pos() == 0) {
1469                         //lyxerr << "new scriptinset" << endl;
1470                         cur.insert(new InsetMathScript(up));
1471                 } else {
1472                         //lyxerr << "converting prev atom " << endl;
1473                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1474                 }
1475                 --cur.pos();
1476                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1477                 // See comment in MathParser.cpp for special handling of {}-bases
1478
1479                 cur.push(*inset);
1480                 cur.idx() = 1;
1481                 cur.pos() = 0;
1482         }
1483         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1484         cur.niceInsert(save_selection);
1485         cur.resetAnchor();
1486         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1487         return true;
1488 }
1489
1490
1491 } // namespace lyx