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 "InsetMathRef.h"
  24 #include "InsetMathScript.h"
  25 #include "InsetMathSpace.h"
  26 #include "InsetMathSymbol.h"
  27 #include "InsetMathUnknown.h"
  28 #include "MathData.h"
  29 #include "MathFactory.h"
  30 #include "MathMacro.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 "CoordCache.h"
  39 #include "Cursor.h"
  40 #include "CutAndPaste.h"
  41 #include "support/debug.h"
  42 #include "DispatchResult.h"
  43 #include "FuncRequest.h"
  44 #include "FuncStatus.h"
  45 #include "LyXFunc.h"
  46 #include "support/gettext.h"
  47 #include "Text.h"
  48 #include "OutputParams.h"
  49
  50 #include "support/lstrings.h"
  51 #include "support/textutils.h"
  52 #include "support/docstream.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(&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(&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::idxForward(Cursor & cur) const
 169 {
 170         return idxNext(cur);
 171 }
 172
 173
 174 bool InsetMathNest::idxPrev(Cursor & cur) const
 175 {
 176         BOOST_ASSERT(&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::idxBackward(Cursor & cur) const
 186 {
 187         return idxPrev(cur);
 188 }
 189
 190
 191 bool InsetMathNest::idxFirst(Cursor & cur) const
 192 {
 193         BOOST_ASSERT(&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(&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 (&cur.inset() != this)
 246                 return;
 247
 248         // FIXME: hack to get position cache warm
 249         bool const original_drawing_state = pi.pain.isDrawingEnabled();
 250         pi.pain.setDrawingEnabled(false);
 251         draw(pi, x, y);
 252         pi.pain.setDrawingEnabled(original_drawing_state);
 253
 254         CursorSlice s1 = cur.selBegin();
 255         CursorSlice s2 = cur.selEnd();
 256
 257         //lyxerr << "InsetMathNest::drawing selection: "
 258         //      << " s1: " << s1 << " s2: " << s2 << endl;
 259         if (s1.idx() == s2.idx()) {
 260                 MathData const & c = cell(s1.idx());
 261                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 262                 int x1 = g.pos.x_ + c.pos2x(s1.pos());
 263                 int y1 = g.pos.y_ - g.dim.ascent();
 264                 int x2 = g.pos.x_ + c.pos2x(s2.pos());
 265                 int y2 = g.pos.y_ + g.dim.descent();
 266                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color_selection);
 267         //lyxerr << "InsetMathNest::drawing selection 3: "
 268         //      << " x1: " << x1 << " x2: " << x2
 269         //      << " y1: " << y1 << " y2: " << y2 << endl;
 270         } else {
 271                 for (idx_type i = 0; i < nargs(); ++i) {
 272                         if (idxBetween(i, s1.idx(), s2.idx())) {
 273                                 MathData const & c = cell(i);
 274                                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 275                                 int x1 = g.pos.x_;
 276                                 int y1 = g.pos.y_ - g.dim.ascent();
 277                                 int x2 = g.pos.x_ + g.dim.width();
 278                                 int y2 = g.pos.y_ + g.dim.descent();
 279                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color_selection);
 280                         }
 281                 }
 282         }
 283 }
 284
 285
 286 void InsetMathNest::validate(LaTeXFeatures & features) const
 287 {
 288         for (idx_type i = 0; i < nargs(); ++i)
 289                 cell(i).validate(features);
 290 }
 291
 292
 293 void InsetMathNest::replace(ReplaceData & rep)
 294 {
 295         for (idx_type i = 0; i < nargs(); ++i)
 296                 cell(i).replace(rep);
 297 }
 298
 299
 300 bool InsetMathNest::contains(MathData const & ar) const
 301 {
 302         for (idx_type i = 0; i < nargs(); ++i)
 303                 if (cell(i).contains(ar))
 304                         return true;
 305         return false;
 306 }
 307
 308
 309 bool InsetMathNest::lock() const
 310 {
 311         return lock_;
 312 }
 313
 314
 315 void InsetMathNest::lock(bool l)
 316 {
 317         lock_ = l;
 318 }
 319
 320
 321 bool InsetMathNest::isActive() const
 322 {
 323         return nargs() > 0;
 324 }
 325
 326
 327 MathData InsetMathNest::glue() const
 328 {
 329         MathData ar;
 330         for (size_t i = 0; i < nargs(); ++i)
 331                 ar.append(cell(i));
 332         return ar;
 333 }
 334
 335
 336 void InsetMathNest::write(WriteStream & os) const
 337 {
 338         os << '\\' << name().c_str();
 339         for (size_t i = 0; i < nargs(); ++i)
 340                 os << '{' << cell(i) << '}';
 341         if (nargs() == 0)
 342                 os.pendingSpace(true);
 343         if (lock_ && !os.latex()) {
 344                 os << "\\lyxlock";
 345                 os.pendingSpace(true);
 346         }
 347 }
 348
 349
 350 void InsetMathNest::normalize(NormalStream & os) const
 351 {
 352         os << '[' << name().c_str();
 353         for (size_t i = 0; i < nargs(); ++i)
 354                 os << ' ' << cell(i);
 355         os << ']';
 356 }
 357
 358
 359 int InsetMathNest::latex(Buffer const &, odocstream & os,
 360                         OutputParams const & runparams) const
 361 {
 362         WriteStream wi(os, runparams.moving_arg, true);
 363         write(wi);
 364         return wi.line();
 365 }
 366
 367
 368 bool InsetMathNest::setMouseHover(bool mouse_hover)
 369 {
 370         mouse_hover_ = mouse_hover;
 371         return true;
 372 }
 373
 374
 375 bool InsetMathNest::notifyCursorLeaves(Cursor & /*cur*/)
 376 {
 377         // FIXME: look here
 378 #if 0
 379         MathData & ar = cur.cell();
 380         // remove base-only "scripts"
 381         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 382                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 383                 if (p && p->nargs() == 1) {
 384                         MathData ar = p->nuc();
 385                         erase(i);
 386                         insert(i, ar);
 387                         cur.adjust(i, ar.size() - 1);
 388                 }
 389         }
 390
 391         // glue adjacent font insets of the same kind
 392         for (pos_type i = 0; i + 1 < size(); ++i) {
 393                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 394                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 395                 if (p && q && p->name() == q->name()) {
 396                         p->cell(0).append(q->cell(0));
 397                         erase(i + 1);
 398                         cur.adjust(i, -1);
 399                 }
 400         }
 401 #endif
 402         return false;
 403 }
 404
 405
 406 void InsetMathNest::handleFont
 407         (Cursor & cur, docstring const & arg, char const * const font)
 408 {
 409         handleFont(cur, arg, from_ascii(font));
 410 }
 411
 412
 413 void InsetMathNest::handleFont
 414         (Cursor & cur, docstring const & arg, docstring const & font)
 415 {
 416         // this whole function is a hack and won't work for incremental font
 417         // changes...
 418
 419         if (cur.inset().asInsetMath()->name() == font) {
 420                 cur.recordUndoInset();
 421                 cur.handleFont(to_utf8(font));
 422         } else {
 423                 cur.recordUndo();
 424                 cur.handleNest(createInsetMath(font));
 425                 cur.insert(arg);
 426         }
 427 }
 428
 429
 430 void InsetMathNest::handleFont2(Cursor & cur, docstring const & arg)
 431 {
 432         cur.recordUndo();
 433         Font font;
 434         bool b;
 435         font.fromString(to_utf8(arg), b);
 436         if (font.fontInfo().color() != Color_inherit) {
 437                 MathAtom at = MathAtom(new InsetMathColor(true, font.fontInfo().color()));
 438                 cur.handleNest(at, 0);
 439         }
 440 }
 441
 442
 443 void InsetMathNest::doDispatch(Cursor & cur, FuncRequest & cmd)
 444 {
 445         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 446         //CursorSlice sl = cur.current();
 447
 448         switch (cmd.action) {
 449
 450         case LFUN_PASTE: {
 451                 cur.recordUndo();
 452                 cur.message(_("Paste"));
 453                 replaceSelection(cur);
 454                 docstring topaste;
 455                 if (cmd.argument().empty() && !theClipboard().isInternal())
 456                         topaste = theClipboard().getAsText();
 457                 else {
 458                         size_t n = 0;
 459                         idocstringstream is(cmd.argument());
 460                         is >> n;
 461                         topaste = cap::getSelection(cur.buffer(), n);
 462                 }
 463                 cur.niceInsert(topaste);
 464                 cur.clearSelection(); // bug 393
 465                 cur.finishUndo();
 466                 break;
 467         }
 468
 469         case LFUN_CUT:
 470                 cur.recordUndo();
 471                 cutSelection(cur, true, true);
 472                 cur.message(_("Cut"));
 473                 // Prevent stale position >= size crash
 474                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 475                 cur.normalize();
 476                 break;
 477
 478         case LFUN_COPY:
 479                 copySelection(cur);
 480                 cur.message(_("Copy"));
 481                 break;
 482
 483         case LFUN_MOUSE_PRESS:
 484                 lfunMousePress(cur, cmd);
 485                 break;
 486
 487         case LFUN_MOUSE_MOTION:
 488                 lfunMouseMotion(cur, cmd);
 489                 break;
 490
 491         case LFUN_MOUSE_RELEASE:
 492                 lfunMouseRelease(cur, cmd);
 493                 break;
 494
 495         case LFUN_FINISHED_BACKWARD:
 496                 cur.bv().cursor() = cur;
 497                 break;
 498
 499         case LFUN_FINISHED_FORWARD:
 500                 ++cur.pos();
 501                 cur.bv().cursor() = cur;
 502                 break;
 503
 504         case LFUN_CHAR_FORWARD:
 505                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 506         case LFUN_CHAR_FORWARD_SELECT:
 507                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 508                 cur.autocorrect() = false;
 509                 cur.clearTargetX();
 510                 cur.macroModeClose();
 511                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 512                         cur.pushBackward(*cur.nextAtom().nucleus());
 513                         cur.inset().idxFirst(cur);
 514                 } else if (cur.posForward() || idxForward(cur)
 515                         || cur.popForward() || cur.selection())
 516                         ;
 517                 else {
 518                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 519                         cur.undispatched();
 520                 }
 521                 break;
 522
 523         case LFUN_CHAR_BACKWARD:
 524                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 525         case LFUN_CHAR_BACKWARD_SELECT:
 526                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 527                 cur.autocorrect() = false;
 528                 cur.clearTargetX();
 529                 cur.macroModeClose();
 530                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 531                         cur.posBackward();
 532                         cur.push(*cur.nextAtom().nucleus());
 533                         cur.inset().idxLast(cur);
 534                 } else if (cur.posBackward() || idxBackward(cur)
 535                         || cur.popBackward() || cur.selection())
 536                         ;
 537                 else {
 538                         cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 539                         cur.undispatched();
 540                 }
 541                 break;
 542
 543         case LFUN_CHAR_RIGHT:
 544         case LFUN_CHAR_RIGHT_SELECT:
 545                 //FIXME: for visual cursor, really move right
 546                 if (reverseDirectionNeeded(cur))
 547                         cmd.action = cmd.action == LFUN_CHAR_RIGHT_SELECT ?
 548                                         LFUN_CHAR_BACKWARD_SELECT : LFUN_CHAR_BACKWARD;
 549                 else
 550                         cmd.action = cmd.action == LFUN_CHAR_RIGHT_SELECT ?
 551                                         LFUN_CHAR_FORWARD_SELECT : LFUN_CHAR_FORWARD;
 552                 doDispatch(cur, cmd);
 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                         cmd.action = cmd.action == LFUN_CHAR_LEFT_SELECT ?
 560                                         LFUN_CHAR_FORWARD_SELECT : LFUN_CHAR_FORWARD;
 561                 else
 562                         cmd.action = cmd.action == LFUN_CHAR_LEFT_SELECT ?
 563                                         LFUN_CHAR_BACKWARD_SELECT : LFUN_CHAR_BACKWARD;
 564                 doDispatch(cur, cmd);
 565                 break;
 566
 567         case LFUN_DOWN:
 568         case LFUN_UP:
 569                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 570         case LFUN_DOWN_SELECT:
 571         case LFUN_UP_SELECT: {
 572                 // close active macro
 573                 if (cur.inMacroMode()) {
 574                         cur.macroModeClose();
 575                         break;
 576                 }
 577
 578                 // stop/start the selection
 579                 bool select = cmd.action == LFUN_DOWN_SELECT ||
 580                         cmd.action == LFUN_UP_SELECT;
 581                 cur.selHandle(select);
 582
 583                 // go up/down
 584                 bool up = cmd.action == LFUN_UP || cmd.action == LFUN_UP_SELECT;
 585                 bool successful = cur.upDownInMath(up);
 586                 if (successful) {
 587                         // notify left insets and give them chance to set update flags
 588                         lyx::notifyCursorLeaves(cur.beforeDispatchCursor(), cur);
 589                         cur.fixIfBroken();
 590                         break;
 591                 }
 592
 593                 if (cur.fixIfBroken())
 594                         // FIXME: Something bad happened. We pass the corrected Cursor
 595                         // instead of letting things go worse.
 596                         break;
 597
 598                 // We did not manage to move the cursor.
 599                 cur.undispatched();
 600                 break;
 601         }
 602
 603         case LFUN_MOUSE_DOUBLE:
 604         case LFUN_MOUSE_TRIPLE:
 605         case LFUN_WORD_SELECT:
 606                 cur.pos() = 0;
 607                 cur.idx() = 0;
 608                 cur.resetAnchor();
 609                 cur.selection() = true;
 610                 cur.pos() = cur.lastpos();
 611                 cur.idx() = cur.lastidx();
 612                 break;
 613
 614         case LFUN_PARAGRAPH_UP:
 615         case LFUN_PARAGRAPH_DOWN:
 616                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 617         case LFUN_PARAGRAPH_UP_SELECT:
 618         case LFUN_PARAGRAPH_DOWN_SELECT:
 619                 break;
 620
 621         case LFUN_LINE_BEGIN:
 622         case LFUN_WORD_BACKWARD:
 623         case LFUN_WORD_LEFT:
 624                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 625         case LFUN_LINE_BEGIN_SELECT:
 626         case LFUN_WORD_BACKWARD_SELECT:
 627         case LFUN_WORD_LEFT_SELECT:
 628                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 629                                 cmd.action == LFUN_WORD_LEFT_SELECT ||
 630                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 631                 cur.macroModeClose();
 632                 if (cur.pos() != 0) {
 633                         cur.pos() = 0;
 634                 } else if (cur.col() != 0) {
 635                         cur.idx() -= cur.col();
 636                         cur.pos() = 0;
 637                 } else if (cur.idx() != 0) {
 638                         cur.idx() = 0;
 639                         cur.pos() = 0;
 640                 } else {
 641                         cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 642                         cur.undispatched();
 643                 }
 644                 break;
 645
 646         case LFUN_WORD_FORWARD:
 647         case LFUN_WORD_RIGHT:
 648         case LFUN_LINE_END:
 649                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 650         case LFUN_WORD_FORWARD_SELECT:
 651         case LFUN_WORD_RIGHT_SELECT:
 652         case LFUN_LINE_END_SELECT:
 653                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 654                                 cmd.action == LFUN_WORD_RIGHT_SELECT ||
 655                                 cmd.action == LFUN_LINE_END_SELECT);
 656                 cur.macroModeClose();
 657                 cur.clearTargetX();
 658                 if (cur.pos() != cur.lastpos()) {
 659                         cur.pos() = cur.lastpos();
 660                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 661                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 662                         cur.pos() = cur.lastpos();
 663                 } else if (cur.idx() != cur.lastidx()) {
 664                         cur.idx() = cur.lastidx();
 665                         cur.pos() = cur.lastpos();
 666                 } else {
 667                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 668                         cur.undispatched();
 669                 }
 670                 break;
 671
 672         case LFUN_SCREEN_UP_SELECT:
 673                 cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 674                 cur.undispatched();
 675                 break;
 676
 677         case LFUN_SCREEN_DOWN_SELECT:
 678                 cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 679                 cur.undispatched();
 680                 break;
 681
 682         case LFUN_CELL_FORWARD:
 683                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 684                 cur.inset().idxNext(cur);
 685                 break;
 686
 687         case LFUN_CELL_BACKWARD:
 688                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 689                 cur.inset().idxPrev(cur);
 690                 break;
 691
 692         case LFUN_WORD_DELETE_BACKWARD:
 693         case LFUN_CHAR_DELETE_BACKWARD:
 694                 if (cur.pos() == 0)
 695                         // May affect external cell:
 696                         cur.recordUndoInset();
 697                 else
 698                         cur.recordUndo();
 699                 // if the inset can not be removed from within, delete it
 700                 if (!cur.backspace()) {
 701                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 702                         cur.innerText()->dispatch(cur, cmd);
 703                 }
 704                 break;
 705
 706         case LFUN_WORD_DELETE_FORWARD:
 707         case LFUN_CHAR_DELETE_FORWARD:
 708                 if (cur.pos() == cur.lastpos())
 709                         // May affect external cell:
 710                         cur.recordUndoInset();
 711                 else
 712                         cur.recordUndo();
 713                 // if the inset can not be removed from within, delete it
 714                 if (!cur.erase()) {
 715                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 716                         cur.innerText()->dispatch(cur, cmd);
 717                 }
 718                 break;
 719
 720         case LFUN_ESCAPE:
 721                 if (cur.selection())
 722                         cur.clearSelection();
 723                 else  {
 724                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 725                         cur.undispatched();
 726                 }
 727                 break;
 728
 729         case LFUN_INSET_TOGGLE:
 730                 cur.recordUndo();
 731                 lock(!lock());
 732                 cur.popForward();
 733                 break;
 734
 735         case LFUN_SELF_INSERT:
 736                 if (cmd.argument().size() != 1) {
 737                         cur.recordUndo();
 738                         docstring const arg = cmd.argument();
 739                         if (!interpretString(cur, arg))
 740                                 cur.insert(arg);
 741                         break;
 742                 }
 743                 // Don't record undo steps if we are in macro mode and
 744                 // cmd.argument is the next character of the macro name.
 745                 // Otherwise we'll get an invalid cursor if we undo after
 746                 // the macro was finished and the macro is a known command,
 747                 // e.g. sqrt. Cursor::macroModeClose replaces in this case
 748                 // the InsetMathUnknown with name "frac" by an empty
 749                 // InsetMathFrac -> a pos value > 0 is invalid.
 750                 // A side effect is that an undo before the macro is finished
 751                 // undoes the complete macro, not only the last character.
 752                 if (!cur.inMacroMode())
 753                         cur.recordUndo();
 754
 755                 // spacial handling of space. If we insert an inset
 756                 // via macro mode, we want to put the cursor inside it
 757                 // if relevant. Think typing "\frac<space>".
 758                 if (cmd.argument()[0] == ' '
 759                     && cur.inMacroMode() && cur.macroName() != "\\"
 760                     && cur.macroModeClose()) {
 761                         MathAtom const atom = cur.prevAtom();
 762                         if (atom->asNestInset() && atom->isActive()) {
 763                                 cur.posBackward();
 764                                 cur.pushBackward(*cur.nextInset());
 765                         }
 766                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 767                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 768                         cur.undispatched();
 769                 }
 770                 break;
 771
 772         //case LFUN_SERVER_GET_XY:
 773         //      sprintf(dispatch_buffer, "%d %d",);
 774         //      break;
 775
 776         case LFUN_SERVER_SET_XY: {
 777                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 778                 int x = 0;
 779                 int y = 0;
 780                 istringstream is(to_utf8(cmd.argument()));
 781                 is >> x >> y;
 782                 cur.setScreenPos(x, y);
 783                 break;
 784         }
 785
 786         // Special casing for superscript in case of LyX handling
 787         // dead-keys:
 788         case LFUN_ACCENT_CIRCUMFLEX:
 789                 if (cmd.argument().empty()) {
 790                         // do superscript if LyX handles
 791                         // deadkeys
 792                         cur.recordUndo();
 793                         script(cur, true, grabAndEraseSelection(cur));
 794                 }
 795                 break;
 796
 797         case LFUN_ACCENT_UMLAUT:
 798         case LFUN_ACCENT_ACUTE:
 799         case LFUN_ACCENT_GRAVE:
 800         case LFUN_ACCENT_BREVE:
 801         case LFUN_ACCENT_DOT:
 802         case LFUN_ACCENT_MACRON:
 803         case LFUN_ACCENT_CARON:
 804         case LFUN_ACCENT_TILDE:
 805         case LFUN_ACCENT_CEDILLA:
 806         case LFUN_ACCENT_CIRCLE:
 807         case LFUN_ACCENT_UNDERDOT:
 808         case LFUN_ACCENT_TIE:
 809         case LFUN_ACCENT_OGONEK:
 810         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 811                 break;
 812
 813         //  Math fonts
 814         case LFUN_FONT_FREE_APPLY:
 815         case LFUN_FONT_FREE_UPDATE:
 816                 handleFont2(cur, cmd.argument());
 817                 break;
 818
 819         case LFUN_FONT_BOLD:
 820                 if (currentMode() == TEXT_MODE)
 821                         handleFont(cur, cmd.argument(), "textbf");
 822                 else
 823                         handleFont(cur, cmd.argument(), "mathbf");
 824                 break;
 825         case LFUN_FONT_SANS:
 826                 if (currentMode() == TEXT_MODE)
 827                         handleFont(cur, cmd.argument(), "textsf");
 828                 else
 829                         handleFont(cur, cmd.argument(), "mathsf");
 830                 break;
 831         case LFUN_FONT_EMPH:
 832                 if (currentMode() == TEXT_MODE)
 833                         handleFont(cur, cmd.argument(), "emph");
 834                 else
 835                         handleFont(cur, cmd.argument(), "mathcal");
 836                 break;
 837         case LFUN_FONT_ROMAN:
 838                 if (currentMode() == TEXT_MODE)
 839                         handleFont(cur, cmd.argument(), "textrm");
 840                 else
 841                         handleFont(cur, cmd.argument(), "mathrm");
 842                 break;
 843         case LFUN_FONT_TYPEWRITER:
 844                 if (currentMode() == TEXT_MODE)
 845                         handleFont(cur, cmd.argument(), "texttt");
 846                 else
 847                         handleFont(cur, cmd.argument(), "mathtt");
 848                 break;
 849         case LFUN_FONT_FRAK:
 850                 handleFont(cur, cmd.argument(), "mathfrak");
 851                 break;
 852         case LFUN_FONT_ITAL:
 853                 if (currentMode() == TEXT_MODE)
 854                         handleFont(cur, cmd.argument(), "textit");
 855                 else
 856                         handleFont(cur, cmd.argument(), "mathit");
 857                 break;
 858         case LFUN_FONT_NOUN:
 859                 if (currentMode() == TEXT_MODE)
 860                         // FIXME: should be "noun"
 861                         handleFont(cur, cmd.argument(), "textsc");
 862                 else
 863                         handleFont(cur, cmd.argument(), "mathbb");
 864                 break;
 865         /*
 866         case LFUN_FONT_FREE_APPLY:
 867                 handleFont(cur, cmd.argument(), "textrm");
 868                 break;
 869         */
 870         case LFUN_FONT_DEFAULT:
 871                 handleFont(cur, cmd.argument(), "textnormal");
 872                 break;
 873
 874         case LFUN_MATH_MODE: {
 875 #if 1
 876                 // ignore math-mode on when already in math mode
 877                 if (currentMode() == Inset::MATH_MODE && cmd.argument() == "on")
 878                         break;
 879                 cur.macroModeClose();
 880                 docstring const save_selection = grabAndEraseSelection(cur);
 881                 selClearOrDel(cur);
 882                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 883                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 884                 cur.posBackward();
 885                 cur.pushBackward(*cur.nextInset());
 886                 cur.niceInsert(save_selection);
 887 #else
 888                 if (currentMode() == Inset::TEXT_MODE) {
 889                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 890                         cur.message(_("create new math text environment ($...$)"));
 891                 } else {
 892                         handleFont(cur, cmd.argument(), "textrm");
 893                         cur.message(_("entered math text mode (textrm)"));
 894                 }
 895 #endif
 896                 break;
 897         }
 898
 899         case LFUN_MATH_SIZE:
 900 #if 0
 901                 cur.recordUndo();
 902                 cur.setSize(arg);
 903 #endif
 904                 break;
 905
 906         case LFUN_MATH_MATRIX: {
 907                 cur.recordUndo();
 908                 unsigned int m = 1;
 909                 unsigned int n = 1;
 910                 docstring v_align;
 911                 docstring h_align;
 912                 idocstringstream is(cmd.argument());
 913                 is >> m >> n >> v_align >> h_align;
 914                 if (m < 1)
 915                         m = 1;
 916                 if (n < 1)
 917                         n = 1;
 918                 v_align += 'c';
 919                 cur.niceInsert(
 920                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 921                 break;
 922         }
 923
 924         case LFUN_MATH_DELIM: {
 925                 docstring ls;
 926                 docstring rs = support::split(cmd.argument(), ls, ' ');
 927                 // Reasonable default values
 928                 if (ls.empty())
 929                         ls = '(';
 930                 if (rs.empty())
 931                         rs = ')';
 932                 cur.recordUndo();
 933                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 934                 break;
 935         }
 936
 937         case LFUN_MATH_BIGDELIM: {
 938                 docstring const lname  = from_utf8(cmd.getArg(0));
 939                 docstring const ldelim = from_utf8(cmd.getArg(1));
 940                 docstring const rname  = from_utf8(cmd.getArg(2));
 941                 docstring const rdelim = from_utf8(cmd.getArg(3));
 942                 latexkeys const * l = in_word_set(lname);
 943                 bool const have_l = l && l->inset == "big" &&
 944                                     InsetMathBig::isBigInsetDelim(ldelim);
 945                 l = in_word_set(rname);
 946                 bool const have_r = l && l->inset == "big" &&
 947                                     InsetMathBig::isBigInsetDelim(rdelim);
 948                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 949                 // or right delimiter.
 950                 if (have_l || have_r) {
 951                         cur.recordUndo();
 952                         docstring const selection = grabAndEraseSelection(cur);
 953                         selClearOrDel(cur);
 954                         if (have_l)
 955                                 cur.insert(MathAtom(new InsetMathBig(lname,
 956                                                                 ldelim)));
 957                         cur.niceInsert(selection);
 958                         if (have_r)
 959                                 cur.insert(MathAtom(new InsetMathBig(rname,
 960                                                                 rdelim)));
 961                 }
 962                 // Don't call cur.undispatched() if we did nothing, this would
 963                 // lead to infinite recursion via Text::dispatch().
 964                 break;
 965         }
 966
 967         case LFUN_SPACE_INSERT:
 968         case LFUN_MATH_SPACE:
 969                 cur.recordUndo();
 970                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 971                 break;
 972
 973         case LFUN_ERT_INSERT:
 974                 // interpret this as if a backslash was typed
 975                 cur.recordUndo();
 976                 interpretChar(cur, '\\');
 977                 break;
 978
 979         case LFUN_MATH_SUBSCRIPT:
 980                 // interpret this as if a _ was typed
 981                 cur.recordUndo();
 982                 interpretChar(cur, '_');
 983                 break;
 984
 985         case LFUN_MATH_SUPERSCRIPT:
 986                 // interpret this as if a ^ was typed
 987                 cur.recordUndo();
 988                 interpretChar(cur, '^');
 989                 break;
 990
 991         case LFUN_MATH_MACRO_FOLD:
 992         case LFUN_MATH_MACRO_UNFOLD: {
 993                 Cursor it = cur;
 994                 bool fold = cmd.action == LFUN_MATH_MACRO_FOLD;
 995                 bool found = findMacroToFoldUnfold(it, fold);
 996                 if (found) {
 997                         cur.recordUndo();
 998                         if (fold)
 999                                 it.nextInset()->asInsetMath()->asMacro()->fold(cur);
1000                         else
1001                                 it.nextInset()->asInsetMath()->asMacro()->unfold(cur);
1002                 }\v
1003                 break;
1004         }
1005
1006         case LFUN_QUOTE_INSERT:
1007                 // interpret this as if a straight " was typed
1008                 cur.recordUndo();
1009                 interpretChar(cur, '\"');
1010                 break;
1011
1012 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
1013 // handling such that "self-insert" works on "arbitrary stuff" too, and
1014 // math-insert only handles special math things like "matrix".
1015         case LFUN_MATH_INSERT: {
1016                 cur.recordUndo();
1017                 if (cmd.argument() == "^" || cmd.argument() == "_") {
1018                         interpretChar(cur, cmd.argument()[0]);
1019                 } else
1020                         cur.niceInsert(cmd.argument());
1021                 break;
1022                 }
1023
1024         case LFUN_DIALOG_SHOW_NEW_INSET: {
1025                 docstring const & name = cmd.argument();
1026                 string data;
1027                 if (name == "ref") {
1028                         InsetMathRef tmp(name);
1029                         data = tmp.createDialogStr(to_utf8(name));
1030                 }
1031                 cur.bv().showDialog(to_utf8(name), data);
1032                 break;
1033         }
1034
1035         case LFUN_INSET_INSERT: {
1036                 MathData ar;
1037                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
1038                         cur.recordUndo();
1039                         cur.insert(ar);
1040                 } else
1041                         cur.undispatched();
1042                 break;
1043         }
1044         case LFUN_INSET_DISSOLVE:
1045                 if (!asHullInset()) {
1046                         cur.recordUndoInset();
1047                         cur.pullArg();
1048                 }
1049                 break;
1050
1051         default:
1052                 InsetMath::doDispatch(cur, cmd);
1053                 break;
1054         }
1055 }
1056
1057
1058 bool InsetMathNest::findMacroToFoldUnfold(Cursor & it, bool fold) const {
1059         // look for macro to open/close, but stay in mathed
1060         for (; !it.empty(); it.pop_back()) {
1061
1062                 // go backward through the current cell
1063                 Inset * inset = it.nextInset();
1064                 while (inset && inset->asInsetMath()) {
1065                         MathMacro * macro = inset->asInsetMath()->asMacro();
1066                         if (macro) {
1067                                 // found the an macro to open/close?
1068                                 if (macro->folded() != fold)
1069                                         return true;
1070
1071                                 // Wrong folding state.
1072                                 // If this was the first we see in this slice, look further left,
1073                                 // otherwise go up.
1074                                 if (inset != it.nextInset())
1075                                         break;
1076                         }
1077
1078                         // go up if this was the left most position
1079                         if (it.pos() == 0)
1080                                 break;
1081
1082                         // go left
1083                         it.pos()--;
1084                         inset = it.nextInset();
1085                 }
1086         }
1087
1088         return false;
1089 }
1090
1091
1092 bool InsetMathNest::getStatus(Cursor & cur, FuncRequest const & cmd,
1093                 FuncStatus & flag) const
1094 {
1095         // the font related toggles
1096         //string tc = "mathnormal";
1097         bool ret = true;
1098         string const arg = to_utf8(cmd.argument());
1099         switch (cmd.action) {
1100         case LFUN_TABULAR_FEATURE:
1101                 flag.enabled(false);
1102                 break;
1103 #if 0
1104         case LFUN_TABULAR_FEATURE:
1105                 // FIXME: check temporarily disabled
1106                 // valign code
1107                 char align = mathcursor::valign();
1108                 if (align == '\0') {
1109                         enable = false;
1110                         break;
1111                 }
1112                 if (cmd.argument().empty()) {
1113                         flag.clear();
1114                         break;
1115                 }
1116                 if (!contains("tcb", cmd.argument()[0])) {
1117                         enable = false;
1118                         break;
1119                 }
1120                 flag.setOnOff(cmd.argument()[0] == align);
1121                 break;
1122 #endif
1123         /// We have to handle them since 1.4 blocks all unhandled actions
1124         case LFUN_FONT_ITAL:
1125         case LFUN_FONT_BOLD:
1126         case LFUN_FONT_SANS:
1127         case LFUN_FONT_EMPH:
1128         case LFUN_FONT_TYPEWRITER:
1129         case LFUN_FONT_NOUN:
1130         case LFUN_FONT_ROMAN:
1131         case LFUN_FONT_DEFAULT:
1132                 flag.enabled(true);
1133                 break;
1134         case LFUN_MATH_MUTATE:
1135                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1136                 flag.setOnOff(false);
1137                 break;
1138
1139         // we just need to be in math mode to enable that
1140         case LFUN_MATH_SIZE:
1141         case LFUN_MATH_SPACE:
1142         case LFUN_MATH_LIMITS:
1143         case LFUN_MATH_NONUMBER:
1144         case LFUN_MATH_NUMBER:
1145         case LFUN_MATH_EXTERN:
1146                 flag.enabled(true);
1147                 break;
1148
1149         case LFUN_FONT_FRAK:
1150                 flag.enabled(currentMode() != TEXT_MODE);
1151                 break;
1152
1153         case LFUN_MATH_INSERT: {
1154                 bool const textarg =
1155                         arg == "\\textbf"   || arg == "\\textsf" ||
1156                         arg == "\\textrm"   || arg == "\\textmd" ||
1157                         arg == "\\textit"   || arg == "\\textsc" ||
1158                         arg == "\\textsl"   || arg == "\\textup" ||
1159                         arg == "\\texttt"   || arg == "\\textbb" ||
1160                         arg == "\\textnormal";
1161                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1162                 break;
1163         }
1164
1165         case LFUN_MATH_MATRIX:
1166                 flag.enabled(currentMode() == MATH_MODE);
1167                 break;
1168
1169         case LFUN_INSET_INSERT: {
1170                 // Don't test createMathInset_fromDialogStr(), since
1171                 // getStatus is not called with a valid reference and the
1172                 // dialog would not be applyable.
1173                 string const name = cmd.getArg(0);
1174                 flag.enabled(name == "ref");
1175                 break;
1176         }
1177
1178         case LFUN_MATH_DELIM:
1179         case LFUN_MATH_BIGDELIM:
1180                 // Don't do this with multi-cell selections
1181                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1182                 break;
1183
1184         case LFUN_MATH_MACRO_FOLD:
1185         case LFUN_MATH_MACRO_UNFOLD: {
1186                 Cursor it = cur;
1187                 bool found = findMacroToFoldUnfold(it, cmd.action == LFUN_MATH_MACRO_FOLD);
1188                 flag.enabled(found);
1189                 break;
1190         }
1191
1192         case LFUN_SPECIALCHAR_INSERT:
1193                 // FIXME: These would probably make sense in math-text mode
1194                 flag.enabled(false);
1195                 break;
1196
1197         case LFUN_INSET_DISSOLVE:
1198                 flag.enabled(!asHullInset());
1199                 break;
1200
1201         default:
1202                 ret = false;
1203                 break;
1204         }
1205         return ret;
1206 }
1207
1208
1209 void InsetMathNest::edit(Cursor & cur, bool left)
1210 {
1211         cur.push(*this);
1212         cur.idx() = left ? 0 : cur.lastidx();
1213         cur.pos() = left ? 0 : cur.lastpos();
1214         cur.resetAnchor();
1215         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1216 }
1217
1218
1219 Inset * InsetMathNest::editXY(Cursor & cur, int x, int y)
1220 {
1221         int idx_min = 0;
1222         int dist_min = 1000000;
1223         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1224                 int const d = cell(i).dist(cur.bv(), x, y);
1225                 if (d < dist_min) {
1226                         dist_min = d;
1227                         idx_min = i;
1228                 }
1229         }
1230         MathData & ar = cell(idx_min);
1231         cur.push(*this);
1232         cur.idx() = idx_min;
1233         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1234
1235         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1236         if (dist_min == 0) {
1237                 // hit inside cell
1238                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1239                         if (ar[i]->covers(cur.bv(), x, y))
1240                                 return ar[i].nucleus()->editXY(cur, x, y);
1241         }
1242         return this;
1243 }
1244
1245
1246 void InsetMathNest::lfunMousePress(Cursor & cur, FuncRequest & cmd)
1247 {
1248         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1249         BufferView & bv = cur.bv();
1250         bool do_selection = cmd.button() == mouse_button::button1
1251                 && cmd.argument() == "region-select";
1252         bv.mouseSetCursor(cur, do_selection);
1253         if (cmd.button() == mouse_button::button1) {
1254                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1255                 // Update the cursor update flags as needed:
1256                 //
1257                 // Update::Decoration: tells to update the decoration
1258                 //                     (visual box corners that define
1259                 //                     the inset)/
1260                 // Update::FitCursor: adjust the screen to the cursor
1261                 //                    position if needed
1262                 // cur.result().update(): don't overwrite previously set flags.
1263                 cur.updateFlags(Update::Decoration | Update::FitCursor
1264                                 | cur.result().update());
1265         } else if (cmd.button() == mouse_button::button2) {
1266                 if (cap::selection()) {
1267                         // See comment in Text::dispatch why we do this
1268                         cap::copySelectionToStack();
1269                         cmd = FuncRequest(LFUN_PASTE, "0");
1270                         doDispatch(bv.cursor(), cmd);
1271                 } else {
1272                         MathData ar;
1273                         asArray(theSelection().get(), ar);
1274                         bv.cursor().insert(ar);
1275                 }
1276         }
1277 }
1278
1279
1280 void InsetMathNest::lfunMouseMotion(Cursor & cur, FuncRequest & cmd)
1281 {
1282         // only select with button 1
1283         if (cmd.button() == mouse_button::button1) {
1284                 Cursor & bvcur = cur.bv().cursor();
1285                 if (bvcur.anchor_.hasPart(cur)) {
1286                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1287                         bvcur.setCursor(cur);
1288                         bvcur.selection() = true;
1289                         //lyxerr << "MOTION " << bvcur << endl;
1290                 } else
1291                         cur.undispatched();
1292         }
1293 }
1294
1295
1296 void InsetMathNest::lfunMouseRelease(Cursor & cur, FuncRequest & cmd)
1297 {
1298         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1299
1300         if (cmd.button() == mouse_button::button1) {
1301                 if (!cur.selection())
1302                         cur.noUpdate();
1303                 else {
1304                         Cursor & bvcur = cur.bv().cursor();
1305                         bvcur.selection() = true;
1306                 }
1307                 return;
1308         }
1309
1310         cur.undispatched();
1311 }
1312
1313
1314 bool InsetMathNest::interpretChar(Cursor & cur, char_type c)
1315 {
1316         //lyxerr << "interpret 2: '" << c << "'" << endl;
1317         docstring save_selection;
1318         if (c == '^' || c == '_')
1319                 save_selection = grabAndEraseSelection(cur);
1320
1321         cur.clearTargetX();
1322
1323         // handle macroMode
1324         if (cur.inMacroMode()) {
1325                 docstring name = cur.macroName();
1326
1327                 /// are we currently typing '#1' or '#2' or...?
1328                 if (name == "\\#") {
1329                         cur.backspace();
1330                         int n = c - '0';
1331                         if (n >= 1 && n <= 9)
1332                                 cur.insert(new MathMacroArgument(n));
1333                         return true;
1334                 }
1335
1336                 if (isAlphaASCII(c)) {
1337                         cur.activeMacro()->setName(name + docstring(1, c));
1338                         return true;
1339                 }
1340
1341                 // handle 'special char' macros
1342                 if (name == "\\") {
1343                         // remove the '\\'
1344                         if (c == '\\') {
1345                                 cur.backspace();
1346                                 if (currentMode() == InsetMath::TEXT_MODE)
1347                                         cur.niceInsert(createInsetMath("textbackslash"));
1348                                 else
1349                                         cur.niceInsert(createInsetMath("backslash"));
1350                         } else if (c == '{') {
1351                                 cur.backspace();
1352                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1353                         } else if (c == '%') {
1354                                 cur.backspace();
1355                                 cur.niceInsert(MathAtom(new InsetMathComment));
1356                         } else if (c == '#') {
1357                                 BOOST_ASSERT(cur.activeMacro());
1358                                 cur.activeMacro()->setName(name + docstring(1, c));
1359                         } else {
1360                                 cur.backspace();
1361                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1362                         }
1363                         return true;
1364                 }
1365
1366                 // One character big delimiters. The others are handled in
1367                 // interpretString().
1368                 latexkeys const * l = in_word_set(name.substr(1));
1369                 if (name[0] == '\\' && l && l->inset == "big") {
1370                         docstring delim;
1371                         switch (c) {
1372                         case '{':
1373                                 delim = from_ascii("\\{");
1374                                 break;
1375                         case '}':
1376                                 delim = from_ascii("\\}");
1377                                 break;
1378                         default:
1379                                 delim = docstring(1, c);
1380                                 break;
1381                         }
1382                         if (InsetMathBig::isBigInsetDelim(delim)) {
1383                                 // name + delim ared a valid InsetMathBig.
1384                                 // We can't use cur.macroModeClose() because
1385                                 // it does not handle delim.
1386                                 InsetMathUnknown * p = cur.activeMacro();
1387                                 p->finalize();
1388                                 --cur.pos();
1389                                 cur.cell().erase(cur.pos());
1390                                 cur.plainInsert(MathAtom(
1391                                         new InsetMathBig(name.substr(1), delim)));
1392                                 return true;
1393                         }
1394                 }
1395
1396                 // leave macro mode and try again if necessary
1397                 cur.macroModeClose();
1398                 if (c == '{')
1399                         cur.niceInsert(MathAtom(new InsetMathBrace));
1400                 else if (c != ' ')
1401                         interpretChar(cur, c);
1402                 return true;
1403         }
1404
1405         // This is annoying as one has to press <space> far too often.
1406         // Disable it.
1407
1408 #if 0
1409                 // leave autocorrect mode if necessary
1410                 if (autocorrect() && c == ' ') {
1411                         autocorrect() = false;
1412                         return true;
1413                 }
1414 #endif
1415
1416         // just clear selection on pressing the space bar
1417         if (cur.selection() && c == ' ') {
1418                 cur.selection() = false;
1419                 return true;
1420         }
1421
1422         selClearOrDel(cur);
1423
1424         if (c == '\\') {
1425                 //lyxerr << "starting with macro" << endl;
1426                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1427                 return true;
1428         }
1429
1430         if (c == '\n') {
1431                 if (currentMode() == InsetMath::TEXT_MODE)
1432                         cur.insert(c);
1433                 return true;
1434         }
1435
1436         if (c == ' ') {
1437                 if (currentMode() == InsetMath::TEXT_MODE) {
1438                         // insert spaces in text mode,
1439                         // but suppress direct insertion of two spaces in a row
1440                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1441                         // it is better than nothing...
1442                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ') {
1443                                 cur.insert(c);
1444                                 // FIXME: we have to enable full redraw here because of the
1445                                 // visual box corners that define the inset. If we know for
1446                                 // sure that we stay within the same cell we can optimize for
1447                                 // that using:
1448                                 //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1449                         }
1450                         return true;
1451                 }
1452                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1453                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1454                         // FIXME: we have to enable full redraw here because of the
1455                         // visual box corners that define the inset. If we know for
1456                         // sure that we stay within the same cell we can optimize for
1457                         // that using:
1458                         //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1459                         return true;
1460                 }
1461
1462                 if (cur.popForward()) {
1463                         // FIXME: we have to enable full redraw here because of the
1464                         // visual box corners that define the inset. If we know for
1465                         // sure that we stay within the same cell we can optimize for
1466                         // that using:
1467                         //cur.updateFlags(Update::FitCursor);
1468                         return true;
1469                 }
1470
1471                 // if we are at the very end, leave the formula
1472                 return cur.pos() != cur.lastpos();
1473         }
1474
1475         // These shouldn't work in text mode:
1476         if (currentMode() != InsetMath::TEXT_MODE) {
1477                 if (c == '_') {
1478                         script(cur, false, save_selection);
1479                         return true;
1480                 }
1481                 if (c == '^') {
1482                         script(cur, true, save_selection);
1483                         return true;
1484                 }
1485                 if (c == '~') {
1486                         cur.niceInsert(createInsetMath("sim"));
1487                         return true;
1488                 }
1489         }
1490
1491         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1492             c == '%' || c == '_' || c == '^') {
1493                 cur.niceInsert(createInsetMath(docstring(1, c)));
1494                 return true;
1495         }
1496
1497
1498         // try auto-correction
1499         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1500         //      return true;
1501
1502         // no special circumstances, so insert the character without any fuss
1503         cur.insert(c);
1504         cur.autocorrect() = true;
1505         return true;
1506 }
1507
1508
1509 bool InsetMathNest::interpretString(Cursor & cur, docstring const & str)
1510 {
1511         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1512         // possible
1513         if (!cur.empty() && cur.pos() > 0 &&
1514             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1515                 if (InsetMathBig::isBigInsetDelim(str)) {
1516                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1517                         if (prev[0] == '\\') {
1518                                 prev = prev.substr(1);
1519                                 latexkeys const * l = in_word_set(prev);
1520                                 if (l && l->inset == "big") {
1521                                         cur.cell()[cur.pos() - 1] =
1522                                                 MathAtom(new InsetMathBig(prev, str));
1523                                         return true;
1524                                 }
1525                         }
1526                 }
1527         }
1528         return false;
1529 }
1530
1531
1532 bool InsetMathNest::script(Cursor & cur, bool up,
1533                 docstring const & save_selection)
1534 {
1535         // Hack to get \^ and \_ working
1536         //lyxerr << "handling script: up: " << up << endl;
1537         if (cur.inMacroMode() && cur.macroName() == "\\") {
1538                 if (up)
1539                         cur.niceInsert(createInsetMath("mathcircumflex"));
1540                 else
1541                         interpretChar(cur, '_');
1542                 return true;
1543         }
1544
1545         cur.macroModeClose();
1546         if (asScriptInset() && cur.idx() == 0) {
1547                 // we are in a nucleus of a script inset, move to _our_ script
1548                 InsetMathScript * inset = asScriptInset();
1549                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1550                 inset->ensure(up);
1551                 cur.idx() = inset->idxOfScript(up);
1552                 cur.pos() = 0;
1553         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1554                 --cur.pos();
1555                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1556                 cur.push(*inset);
1557                 inset->ensure(up);
1558                 cur.idx() = inset->idxOfScript(up);
1559                 cur.pos() = cur.lastpos();
1560         } else {
1561                 // convert the thing to our left to a scriptinset or create a new
1562                 // one if in the very first position of the array
1563                 if (cur.pos() == 0) {
1564                         //lyxerr << "new scriptinset" << endl;
1565                         cur.insert(new InsetMathScript(up));
1566                 } else {
1567                         //lyxerr << "converting prev atom " << endl;
1568                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1569                 }
1570                 --cur.pos();
1571                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1572                 // See comment in MathParser.cpp for special handling of {}-bases
1573
1574                 cur.push(*inset);
1575                 cur.idx() = 1;
1576                 cur.pos() = 0;
1577         }
1578         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1579         cur.niceInsert(save_selection);
1580         cur.resetAnchor();
1581         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1582         return true;
1583 }
1584
1585
1586 } // namespace lyx