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 "debug.h"
  42 #include "DispatchResult.h"
  43 #include "FuncRequest.h"
  44 #include "FuncStatus.h"
  45 #include "LyXFunc.h"
  46 #include "gettext.h"
  47 #include "Text.h"
  48 #include "OutputParams.h"
  49
  50 #include "support/lstrings.h"
  51 #include "support/textutils.h"
  52
  53 #include "frontends/Clipboard.h"
  54 #include "frontends/Painter.h"
  55 #include "frontends/Selection.h"
  56
  57 #include "FuncRequest.h"
  58
  59 #include <sstream>
  60
  61
  62 namespace lyx {
  63
  64 using cap::copySelection;
  65 using cap::grabAndEraseSelection;
  66 using cap::cutSelection;
  67 using cap::replaceSelection;
  68 using cap::selClearOrDel;
  69
  70 using std::endl;
  71 using std::string;
  72 using std::istringstream;
  73
  74
  75 InsetMathNest::InsetMathNest(idx_type nargs)
  76         : cells_(nargs), lock_(false), mouse_hover_(false)
  77 {}
  78
  79
  80 InsetMathNest::InsetMathNest(InsetMathNest const & inset)
  81         : InsetMath(inset), cells_(inset.cells_), lock_(inset.lock_),
  82           mouse_hover_(false)
  83 {}
  84
  85
  86 InsetMathNest & InsetMathNest::operator=(InsetMathNest const & inset)
  87 {
  88         cells_ = inset.cells_;
  89         lock_ = inset.lock_;
  90         mouse_hover_ = false;
  91         InsetMath::operator=(inset);
  92         return *this;
  93 }
  94
  95
  96 InsetMath::idx_type InsetMathNest::nargs() const
  97 {
  98         return cells_.size();
  99 }
 100
 101
 102 void InsetMathNest::cursorPos(BufferView const & bv,
 103                 CursorSlice const & sl, bool /*boundary*/,
 104                 int & x, int & y) const
 105 {
 106 // FIXME: This is a hack. Ideally, the coord cache should not store
 107 // absolute positions, but relative ones. This would mean to call
 108 // setXY() not in MathData::draw(), but in the parent insets' draw()
 109 // with the correctly adjusted x,y values. But this means that we'd have
 110 // to touch all (math)inset's draw() methods. Right now, we'll store
 111 // absolute value, and make them here relative, only to make them
 112 // absolute again when actually drawing the cursor. What a mess.
 113         BOOST_ASSERT(&sl.inset() == this);
 114         MathData const & ar = sl.cell();
 115         CoordCache const & coord_cache = bv.coordCache();
 116         if (!coord_cache.getArrays().has(&ar)) {
 117                 // this can (semi-)legally happen if we just created this cell
 118                 // and it never has been drawn before. So don't ASSERT.
 119                 //lyxerr << "no cached data for array " << &ar << endl;
 120                 x = 0;
 121                 y = 0;
 122                 return;
 123         }
 124         Point const pt = coord_cache.getArrays().xy(&ar);
 125         if (!coord_cache.getInsets().has(this)) {
 126                 // same as above
 127                 //lyxerr << "no cached data for inset " << this << endl;
 128                 x = 0;
 129                 y = 0;
 130                 return;
 131         }
 132         Point const pt2 = coord_cache.getInsets().xy(this);
 133         //lyxerr << "retrieving position cache for MathData "
 134         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 135         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 136         y = pt.y_ - pt2.y_;
 137 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 138 //              << " asc: " << ascent() << "  des: " << descent()
 139 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 140         // move cursor visually into empty cells ("blue rectangles");
 141         if (ar.empty())
 142                 x += 2;
 143 }
 144
 145
 146 void InsetMathNest::metrics(MetricsInfo const & mi) const
 147 {
 148         MetricsInfo m = mi;
 149         for (idx_type i = 0, n = nargs(); i != n; ++i) {
 150                 Dimension dim;
 151                 cell(i).metrics(m, dim);
 152         }
 153 }
 154
 155
 156 bool InsetMathNest::idxNext(Cursor & cur) const
 157 {
 158         BOOST_ASSERT(&cur.inset() == this);
 159         if (cur.idx() == cur.lastidx())
 160                 return false;
 161         ++cur.idx();
 162         cur.pos() = 0;
 163         return true;
 164 }
 165
 166
 167 bool InsetMathNest::idxRight(Cursor & cur) const
 168 {
 169         return idxNext(cur);
 170 }
 171
 172
 173 bool InsetMathNest::idxPrev(Cursor & cur) const
 174 {
 175         BOOST_ASSERT(&cur.inset() == this);
 176         if (cur.idx() == 0)
 177                 return false;
 178         --cur.idx();
 179         cur.pos() = cur.lastpos();
 180         return true;
 181 }
 182
 183
 184 bool InsetMathNest::idxLeft(Cursor & cur) const
 185 {
 186         return idxPrev(cur);
 187 }
 188
 189
 190 bool InsetMathNest::idxFirst(Cursor & cur) const
 191 {
 192         BOOST_ASSERT(&cur.inset() == this);
 193         if (nargs() == 0)
 194                 return false;
 195         cur.idx() = 0;
 196         cur.pos() = 0;
 197         return true;
 198 }
 199
 200
 201 bool InsetMathNest::idxLast(Cursor & cur) const
 202 {
 203         BOOST_ASSERT(&cur.inset() == this);
 204         if (nargs() == 0)
 205                 return false;
 206         cur.idx() = cur.lastidx();
 207         cur.pos() = cur.lastpos();
 208         return true;
 209 }
 210
 211
 212 void InsetMathNest::dump() const
 213 {
 214         odocstringstream oss;
 215         WriteStream os(oss);
 216         os << "---------------------------------------------\n";
 217         write(os);
 218         os << "\n";
 219         for (idx_type i = 0, n = nargs(); i != n; ++i)
 220                 os << cell(i) << "\n";
 221         os << "---------------------------------------------\n";
 222         lyxerr << to_utf8(oss.str());
 223 }
 224
 225
 226 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 227 {
 228 #if 0
 229         if (lock_)
 230                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 231                                         Color_mathlockbg);
 232 #endif
 233         setPosCache(pi, x, y);
 234 }
 235
 236
 237 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 238 {
 239         BufferView & bv = *pi.base.bv;
 240         // this should use the x/y values given, not the cached values
 241         Cursor & cur = bv.cursor();
 242         if (!cur.selection())
 243                 return;
 244         if (&cur.inset() != this)
 245                 return;
 246
 247         // FIXME: hack to get position cache warm
 248         pi.pain.setDrawingEnabled(false);
 249         draw(pi, x, y);
 250         pi.pain.setDrawingEnabled(true);
 251
 252         CursorSlice s1 = cur.selBegin();
 253         CursorSlice s2 = cur.selEnd();
 254
 255         //lyxerr << "InsetMathNest::drawing selection: "
 256         //      << " s1: " << s1 << " s2: " << s2 << endl;
 257         if (s1.idx() == s2.idx()) {
 258                 MathData const & c = cell(s1.idx());
 259                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 260                 int x1 = g.pos.x_ + c.pos2x(s1.pos());
 261                 int y1 = g.pos.y_ - g.dim.ascent();
 262                 int x2 = g.pos.x_ + c.pos2x(s2.pos());
 263                 int y2 = g.pos.y_ + g.dim.descent();
 264                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color_selection);
 265         //lyxerr << "InsetMathNest::drawing selection 3: "
 266         //      << " x1: " << x1 << " x2: " << x2
 267         //      << " y1: " << y1 << " y2: " << y2 << endl;
 268         } else {
 269                 for (idx_type i = 0; i < nargs(); ++i) {
 270                         if (idxBetween(i, s1.idx(), s2.idx())) {
 271                                 MathData const & c = cell(i);
 272                                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 273                                 int x1 = g.pos.x_;
 274                                 int y1 = g.pos.y_ - g.dim.ascent();
 275                                 int x2 = g.pos.x_ + g.dim.width();
 276                                 int y2 = g.pos.y_ + g.dim.descent();
 277                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color_selection);
 278                         }
 279                 }
 280         }
 281 }
 282
 283
 284 void InsetMathNest::validate(LaTeXFeatures & features) const
 285 {
 286         for (idx_type i = 0; i < nargs(); ++i)
 287                 cell(i).validate(features);
 288 }
 289
 290
 291 void InsetMathNest::replace(ReplaceData & rep)
 292 {
 293         for (idx_type i = 0; i < nargs(); ++i)
 294                 cell(i).replace(rep);
 295 }
 296
 297
 298 bool InsetMathNest::contains(MathData const & ar) const
 299 {
 300         for (idx_type i = 0; i < nargs(); ++i)
 301                 if (cell(i).contains(ar))
 302                         return true;
 303         return false;
 304 }
 305
 306
 307 bool InsetMathNest::lock() const
 308 {
 309         return lock_;
 310 }
 311
 312
 313 void InsetMathNest::lock(bool l)
 314 {
 315         lock_ = l;
 316 }
 317
 318
 319 bool InsetMathNest::isActive() const
 320 {
 321         return nargs() > 0;
 322 }
 323
 324
 325 MathData InsetMathNest::glue() const
 326 {
 327         MathData ar;
 328         for (size_t i = 0; i < nargs(); ++i)
 329                 ar.append(cell(i));
 330         return ar;
 331 }
 332
 333
 334 void InsetMathNest::write(WriteStream & os) const
 335 {
 336         os << '\\' << name().c_str();
 337         for (size_t i = 0; i < nargs(); ++i)
 338                 os << '{' << cell(i) << '}';
 339         if (nargs() == 0)
 340                 os.pendingSpace(true);
 341         if (lock_ && !os.latex()) {
 342                 os << "\\lyxlock";
 343                 os.pendingSpace(true);
 344         }
 345 }
 346
 347
 348 void InsetMathNest::normalize(NormalStream & os) const
 349 {
 350         os << '[' << name().c_str();
 351         for (size_t i = 0; i < nargs(); ++i)
 352                 os << ' ' << cell(i);
 353         os << ']';
 354 }
 355
 356
 357 int InsetMathNest::latex(Buffer const &, odocstream & os,
 358                         OutputParams const & runparams) const
 359 {
 360         WriteStream wi(os, runparams.moving_arg, true);
 361         write(wi);
 362         return wi.line();
 363 }
 364
 365
 366 bool InsetMathNest::setMouseHover(bool mouse_hover)
 367 {
 368         mouse_hover_ = mouse_hover;
 369         return true;
 370 }
 371
 372
 373 bool InsetMathNest::notifyCursorLeaves(Cursor & /*cur*/)
 374 {
 375         // FIXME: look here
 376 #if 0
 377         MathData & ar = cur.cell();
 378         // remove base-only "scripts"
 379         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 380                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 381                 if (p && p->nargs() == 1) {
 382                         MathData ar = p->nuc();
 383                         erase(i);
 384                         insert(i, ar);
 385                         cur.adjust(i, ar.size() - 1);
 386                 }
 387         }
 388
 389         // glue adjacent font insets of the same kind
 390         for (pos_type i = 0; i + 1 < size(); ++i) {
 391                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 392                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 393                 if (p && q && p->name() == q->name()) {
 394                         p->cell(0).append(q->cell(0));
 395                         erase(i + 1);
 396                         cur.adjust(i, -1);
 397                 }
 398         }
 399 #endif
 400         return false;
 401 }
 402
 403
 404 void InsetMathNest::handleFont
 405         (Cursor & cur, docstring const & arg, char const * const font)
 406 {
 407         handleFont(cur, arg, from_ascii(font));
 408 }
 409
 410
 411 void InsetMathNest::handleFont
 412         (Cursor & cur, docstring const & arg, docstring const & font)
 413 {
 414         // this whole function is a hack and won't work for incremental font
 415         // changes...
 416
 417         if (cur.inset().asInsetMath()->name() == font) {
 418                 cur.recordUndoInset();
 419                 cur.handleFont(to_utf8(font));
 420         } else {
 421                 cur.recordUndo();
 422                 cur.handleNest(createInsetMath(font));
 423                 cur.insert(arg);
 424         }
 425 }
 426
 427
 428 void InsetMathNest::handleFont2(Cursor & cur, docstring const & arg)
 429 {
 430         cur.recordUndo();
 431         Font font;
 432         bool b;
 433         font.fromString(to_utf8(arg), b);
 434         if (font.fontInfo().color() != Color_inherit) {
 435                 MathAtom at = MathAtom(new InsetMathColor(true, font.fontInfo().color()));
 436                 cur.handleNest(at, 0);
 437         }
 438 }
 439
 440
 441 void InsetMathNest::doDispatch(Cursor & cur, FuncRequest & cmd)
 442 {
 443         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 444         //CursorSlice sl = cur.current();
 445
 446         switch (cmd.action) {
 447
 448         case LFUN_PASTE: {
 449                 cur.recordUndo();
 450                 cur.message(_("Paste"));
 451                 replaceSelection(cur);
 452                 docstring topaste;
 453                 if (cmd.argument().empty() && !theClipboard().isInternal())
 454                         topaste = theClipboard().getAsText();
 455                 else {
 456                         size_t n = 0;
 457                         idocstringstream is(cmd.argument());
 458                         is >> n;
 459                         topaste = cap::getSelection(cur.buffer(), n);
 460                 }
 461                 cur.niceInsert(topaste);
 462                 cur.clearSelection(); // bug 393
 463                 cur.finishUndo();
 464                 break;
 465         }
 466
 467         case LFUN_CUT:
 468                 cur.recordUndo();
 469                 cutSelection(cur, true, true);
 470                 cur.message(_("Cut"));
 471                 // Prevent stale position >= size crash
 472                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 473                 cur.normalize();
 474                 break;
 475
 476         case LFUN_COPY:
 477                 copySelection(cur);
 478                 cur.message(_("Copy"));
 479                 break;
 480
 481         case LFUN_MOUSE_PRESS:
 482                 lfunMousePress(cur, cmd);
 483                 break;
 484
 485         case LFUN_MOUSE_MOTION:
 486                 lfunMouseMotion(cur, cmd);
 487                 break;
 488
 489         case LFUN_MOUSE_RELEASE:
 490                 lfunMouseRelease(cur, cmd);
 491                 break;
 492
 493         case LFUN_FINISHED_BACKWARD:
 494                 cur.bv().cursor() = cur;
 495                 break;
 496
 497         case LFUN_FINISHED_FORWARD:
 498                 ++cur.pos();
 499                 cur.bv().cursor() = cur;
 500                 break;
 501
 502         case LFUN_CHAR_FORWARD:
 503                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 504         case LFUN_CHAR_FORWARD_SELECT:
 505                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 506                 cur.autocorrect() = false;
 507                 cur.clearTargetX();
 508                 cur.macroModeClose();
 509                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 510                         cur.pushLeft(*cur.nextAtom().nucleus());
 511                         cur.inset().idxFirst(cur);
 512                 } else if (cur.posRight() || idxRight(cur)
 513                         || cur.popRight() || cur.selection())
 514                         ;
 515                 else {
 516                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 517                         cur.undispatched();
 518                 }
 519                 break;
 520
 521         case LFUN_CHAR_BACKWARD:
 522                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 523         case LFUN_CHAR_BACKWARD_SELECT:
 524                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 525                 cur.autocorrect() = false;
 526                 cur.clearTargetX();
 527                 cur.macroModeClose();
 528                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 529                         cur.posLeft();
 530                         cur.push(*cur.nextAtom().nucleus());
 531                         cur.inset().idxLast(cur);
 532                 } else if (cur.posLeft() || idxLeft(cur)
 533                         || cur.popLeft() || cur.selection())
 534                         ;
 535                 else {
 536                         cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 537                         cur.undispatched();
 538                 }
 539                 break;
 540
 541         case LFUN_CHAR_RIGHT:
 542         case LFUN_CHAR_RIGHT_SELECT:
 543                 //FIXME: for visual cursor, really move right
 544                 if (reverseDirectionNeeded(cur))
 545                         lyx::dispatch(FuncRequest(
 546                                 cmd.action == LFUN_CHAR_RIGHT_SELECT ?
 547                                         LFUN_CHAR_BACKWARD_SELECT : LFUN_CHAR_BACKWARD));
 548                 else
 549                         lyx::dispatch(FuncRequest(
 550                                 cmd.action == LFUN_CHAR_RIGHT_SELECT ?
 551                                         LFUN_CHAR_FORWARD_SELECT : LFUN_CHAR_FORWARD));
 552                 break;
 553
 554         case LFUN_CHAR_LEFT:
 555         case LFUN_CHAR_LEFT_SELECT:
 556                 //FIXME: for visual cursor, really move left
 557                 if (reverseDirectionNeeded(cur))
 558                         lyx::dispatch(FuncRequest(
 559                                 cmd.action == LFUN_CHAR_LEFT_SELECT ?
 560                                         LFUN_CHAR_FORWARD_SELECT : LFUN_CHAR_FORWARD));
 561                 else
 562                         lyx::dispatch(FuncRequest(
 563                                 cmd.action == LFUN_CHAR_LEFT_SELECT ?
 564                                         LFUN_CHAR_BACKWARD_SELECT : LFUN_CHAR_BACKWARD));
 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.popRight();
 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.posLeft();
 764                                 cur.pushLeft(*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.posLeft();
 885                 cur.pushLeft(*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().showInsetDialog(to_utf8(name), data, 0);
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 -> go up one level
1072                                 break;
1073                         }
1074
1075                         // go up if this was the left most position
1076                         if (it.pos() == 0)
1077                                 break;
1078
1079                         // go left
1080                         it.pos()--;
1081                         inset = it.nextInset();
1082                 }
1083         }
1084
1085         return false;
1086 }
1087
1088
1089 bool InsetMathNest::getStatus(Cursor & cur, FuncRequest const & cmd,
1090                 FuncStatus & flag) const
1091 {
1092         // the font related toggles
1093         //string tc = "mathnormal";
1094         bool ret = true;
1095         string const arg = to_utf8(cmd.argument());
1096         switch (cmd.action) {
1097         case LFUN_TABULAR_FEATURE:
1098                 flag.enabled(false);
1099                 break;
1100 #if 0
1101         case LFUN_TABULAR_FEATURE:
1102                 // FIXME: check temporarily disabled
1103                 // valign code
1104                 char align = mathcursor::valign();
1105                 if (align == '\0') {
1106                         enable = false;
1107                         break;
1108                 }
1109                 if (cmd.argument().empty()) {
1110                         flag.clear();
1111                         break;
1112                 }
1113                 if (!contains("tcb", cmd.argument()[0])) {
1114                         enable = false;
1115                         break;
1116                 }
1117                 flag.setOnOff(cmd.argument()[0] == align);
1118                 break;
1119 #endif
1120         /// We have to handle them since 1.4 blocks all unhandled actions
1121         case LFUN_FONT_ITAL:
1122         case LFUN_FONT_BOLD:
1123         case LFUN_FONT_SANS:
1124         case LFUN_FONT_EMPH:
1125         case LFUN_FONT_TYPEWRITER:
1126         case LFUN_FONT_NOUN:
1127         case LFUN_FONT_ROMAN:
1128         case LFUN_FONT_DEFAULT:
1129                 flag.enabled(true);
1130                 break;
1131         case LFUN_MATH_MUTATE:
1132                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1133                 flag.setOnOff(false);
1134                 break;
1135
1136         // we just need to be in math mode to enable that
1137         case LFUN_MATH_SIZE:
1138         case LFUN_MATH_SPACE:
1139         case LFUN_MATH_LIMITS:
1140         case LFUN_MATH_NONUMBER:
1141         case LFUN_MATH_NUMBER:
1142         case LFUN_MATH_EXTERN:
1143                 flag.enabled(true);
1144                 break;
1145
1146         case LFUN_FONT_FRAK:
1147                 flag.enabled(currentMode() != TEXT_MODE);
1148                 break;
1149
1150         case LFUN_MATH_INSERT: {
1151                 bool const textarg =
1152                         arg == "\\textbf"   || arg == "\\textsf" ||
1153                         arg == "\\textrm"   || arg == "\\textmd" ||
1154                         arg == "\\textit"   || arg == "\\textsc" ||
1155                         arg == "\\textsl"   || arg == "\\textup" ||
1156                         arg == "\\texttt"   || arg == "\\textbb" ||
1157                         arg == "\\textnormal";
1158                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1159                 break;
1160         }
1161
1162         case LFUN_MATH_MATRIX:
1163                 flag.enabled(currentMode() == MATH_MODE);
1164                 break;
1165
1166         case LFUN_INSET_INSERT: {
1167                 // Don't test createMathInset_fromDialogStr(), since
1168                 // getStatus is not called with a valid reference and the
1169                 // dialog would not be applyable.
1170                 string const name = cmd.getArg(0);
1171                 flag.enabled(name == "ref");
1172                 break;
1173         }
1174
1175         case LFUN_MATH_DELIM:
1176         case LFUN_MATH_BIGDELIM:
1177                 // Don't do this with multi-cell selections
1178                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1179                 break;
1180
1181         case LFUN_MATH_MACRO_FOLD:
1182         case LFUN_MATH_MACRO_UNFOLD: {
1183                 Cursor it = cur;
1184                 bool found = findMacroToFoldUnfold(it, cmd.action == LFUN_MATH_MACRO_FOLD);
1185                 flag.enabled(found);
1186                 break;
1187         }
1188
1189         case LFUN_HYPHENATION_POINT_INSERT:
1190         case LFUN_LIGATURE_BREAK_INSERT:
1191         case LFUN_MENU_SEPARATOR_INSERT:
1192         case LFUN_DOTS_INSERT:
1193         case LFUN_END_OF_SENTENCE_PERIOD_INSERT:
1194                 // FIXME: These would probably make sense in math-text mode
1195                 flag.enabled(false);
1196                 break;
1197
1198         case LFUN_INSET_DISSOLVE:
1199                 flag.enabled(!asHullInset());
1200                 break;
1201
1202         default:
1203                 ret = false;
1204                 break;
1205         }
1206         return ret;
1207 }
1208
1209
1210 void InsetMathNest::edit(Cursor & cur, bool left)
1211 {
1212         cur.push(*this);
1213         cur.idx() = left ? 0 : cur.lastidx();
1214         cur.pos() = left ? 0 : cur.lastpos();
1215         cur.resetAnchor();
1216         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1217 }
1218
1219
1220 Inset * InsetMathNest::editXY(Cursor & cur, int x, int y)
1221 {
1222         int idx_min = 0;
1223         int dist_min = 1000000;
1224         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1225                 int const d = cell(i).dist(cur.bv(), x, y);
1226                 if (d < dist_min) {
1227                         dist_min = d;
1228                         idx_min = i;
1229                 }
1230         }
1231         MathData & ar = cell(idx_min);
1232         cur.push(*this);
1233         cur.idx() = idx_min;
1234         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1235
1236         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1237         if (dist_min == 0) {
1238                 // hit inside cell
1239                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1240                         if (ar[i]->covers(cur.bv(), x, y))
1241                                 return ar[i].nucleus()->editXY(cur, x, y);
1242         }
1243         return this;
1244 }
1245
1246
1247 void InsetMathNest::lfunMousePress(Cursor & cur, FuncRequest & cmd)
1248 {
1249         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1250         BufferView & bv = cur.bv();
1251         bool do_selection = cmd.button() == mouse_button::button1
1252                 && cmd.argument() == "region-select";
1253         bv.mouseSetCursor(cur, do_selection);
1254         if (cmd.button() == mouse_button::button1) {
1255                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1256                 // Update the cursor update flags as needed:
1257                 //
1258                 // Update::Decoration: tells to update the decoration
1259                 //                     (visual box corners that define
1260                 //                     the inset)/
1261                 // Update::FitCursor: adjust the screen to the cursor
1262                 //                    position if needed
1263                 // cur.result().update(): don't overwrite previously set flags.
1264                 cur.updateFlags(Update::Decoration | Update::FitCursor
1265                                 | cur.result().update());
1266         } else if (cmd.button() == mouse_button::button2) {
1267                 if (cap::selection()) {
1268                         // See comment in Text::dispatch why we do this
1269                         cap::copySelectionToStack();
1270                         cmd = FuncRequest(LFUN_PASTE, "0");
1271                         doDispatch(bv.cursor(), cmd);
1272                 } else {
1273                         MathData ar;
1274                         asArray(theSelection().get(), ar);
1275                         bv.cursor().insert(ar);
1276                 }
1277         }
1278 }
1279
1280
1281 void InsetMathNest::lfunMouseMotion(Cursor & cur, FuncRequest & cmd)
1282 {
1283         // only select with button 1
1284         if (cmd.button() == mouse_button::button1) {
1285                 Cursor & bvcur = cur.bv().cursor();
1286                 if (bvcur.anchor_.hasPart(cur)) {
1287                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1288                         bvcur.setCursor(cur);
1289                         bvcur.selection() = true;
1290                         //lyxerr << "MOTION " << bvcur << endl;
1291                 } else
1292                         cur.undispatched();
1293         }
1294 }
1295
1296
1297 void InsetMathNest::lfunMouseRelease(Cursor & cur, FuncRequest & cmd)
1298 {
1299         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1300
1301         if (cmd.button() == mouse_button::button1) {
1302                 if (!cur.selection())
1303                         cur.noUpdate();
1304                 else {
1305                         Cursor & bvcur = cur.bv().cursor();
1306                         bvcur.selection() = true;
1307                 }
1308                 return;
1309         }
1310
1311         cur.undispatched();
1312 }
1313
1314
1315 bool InsetMathNest::interpretChar(Cursor & cur, char_type c)
1316 {
1317         //lyxerr << "interpret 2: '" << c << "'" << endl;
1318         docstring save_selection;
1319         if (c == '^' || c == '_')
1320                 save_selection = grabAndEraseSelection(cur);
1321
1322         cur.clearTargetX();
1323
1324         // handle macroMode
1325         if (cur.inMacroMode()) {
1326                 docstring name = cur.macroName();
1327
1328                 /// are we currently typing '#1' or '#2' or...?
1329                 if (name == "\\#") {
1330                         cur.backspace();
1331                         int n = c - '0';
1332                         if (n >= 1 && n <= 9)
1333                                 cur.insert(new MathMacroArgument(n));
1334                         return true;
1335                 }
1336
1337                 if (isAlphaASCII(c)) {
1338                         cur.activeMacro()->setName(name + docstring(1, c));
1339                         return true;
1340                 }
1341
1342                 // handle 'special char' macros
1343                 if (name == "\\") {
1344                         // remove the '\\'
1345                         if (c == '\\') {
1346                                 cur.backspace();
1347                                 if (currentMode() == InsetMath::TEXT_MODE)
1348                                         cur.niceInsert(createInsetMath("textbackslash"));
1349                                 else
1350                                         cur.niceInsert(createInsetMath("backslash"));
1351                         } else if (c == '{') {
1352                                 cur.backspace();
1353                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1354                         } else if (c == '%') {
1355                                 cur.backspace();
1356                                 cur.niceInsert(MathAtom(new InsetMathComment));
1357                         } else if (c == '#') {
1358                                 BOOST_ASSERT(cur.activeMacro());
1359                                 cur.activeMacro()->setName(name + docstring(1, c));
1360                         } else {
1361                                 cur.backspace();
1362                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1363                         }
1364                         return true;
1365                 }
1366
1367                 // One character big delimiters. The others are handled in
1368                 // interpretString().
1369                 latexkeys const * l = in_word_set(name.substr(1));
1370                 if (name[0] == '\\' && l && l->inset == "big") {
1371                         docstring delim;
1372                         switch (c) {
1373                         case '{':
1374                                 delim = from_ascii("\\{");
1375                                 break;
1376                         case '}':
1377                                 delim = from_ascii("\\}");
1378                                 break;
1379                         default:
1380                                 delim = docstring(1, c);
1381                                 break;
1382                         }
1383                         if (InsetMathBig::isBigInsetDelim(delim)) {
1384                                 // name + delim ared a valid InsetMathBig.
1385                                 // We can't use cur.macroModeClose() because
1386                                 // it does not handle delim.
1387                                 InsetMathUnknown * p = cur.activeMacro();
1388                                 p->finalize();
1389                                 --cur.pos();
1390                                 cur.cell().erase(cur.pos());
1391                                 cur.plainInsert(MathAtom(
1392                                         new InsetMathBig(name.substr(1), delim)));
1393                                 return true;
1394                         }
1395                 }
1396
1397                 // leave macro mode and try again if necessary
1398                 cur.macroModeClose();
1399                 if (c == '{')
1400                         cur.niceInsert(MathAtom(new InsetMathBrace));
1401                 else if (c != ' ')
1402                         interpretChar(cur, c);
1403                 return true;
1404         }
1405
1406         // This is annoying as one has to press <space> far too often.
1407         // Disable it.
1408
1409 #if 0
1410                 // leave autocorrect mode if necessary
1411                 if (autocorrect() && c == ' ') {
1412                         autocorrect() = false;
1413                         return true;
1414                 }
1415 #endif
1416
1417         // just clear selection on pressing the space bar
1418         if (cur.selection() && c == ' ') {
1419                 cur.selection() = false;
1420                 return true;
1421         }
1422
1423         selClearOrDel(cur);
1424
1425         if (c == '\\') {
1426                 //lyxerr << "starting with macro" << endl;
1427                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1428                 return true;
1429         }
1430
1431         if (c == '\n') {
1432                 if (currentMode() == InsetMath::TEXT_MODE)
1433                         cur.insert(c);
1434                 return true;
1435         }
1436
1437         if (c == ' ') {
1438                 if (currentMode() == InsetMath::TEXT_MODE) {
1439                         // insert spaces in text mode,
1440                         // but suppress direct insertion of two spaces in a row
1441                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1442                         // it is better than nothing...
1443                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ') {
1444                                 cur.insert(c);
1445                                 // FIXME: we have to enable full redraw here because of the
1446                                 // visual box corners that define the inset. If we know for
1447                                 // sure that we stay within the same cell we can optimize for
1448                                 // that using:
1449                                 //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1450                         }
1451                         return true;
1452                 }
1453                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1454                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1455                         // FIXME: we have to enable full redraw here because of the
1456                         // visual box corners that define the inset. If we know for
1457                         // sure that we stay within the same cell we can optimize for
1458                         // that using:
1459                         //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1460                         return true;
1461                 }
1462
1463                 if (cur.popRight()) {
1464                         // FIXME: we have to enable full redraw here because of the
1465                         // visual box corners that define the inset. If we know for
1466                         // sure that we stay within the same cell we can optimize for
1467                         // that using:
1468                         //cur.updateFlags(Update::FitCursor);
1469                         return true;
1470                 }
1471
1472                 // if we are at the very end, leave the formula
1473                 return cur.pos() != cur.lastpos();
1474         }
1475
1476         // These shouldn't work in text mode:
1477         if (currentMode() != InsetMath::TEXT_MODE) {
1478                 if (c == '_') {
1479                         script(cur, false, save_selection);
1480                         return true;
1481                 }
1482                 if (c == '^') {
1483                         script(cur, true, save_selection);
1484                         return true;
1485                 }
1486                 if (c == '~') {
1487                         cur.niceInsert(createInsetMath("sim"));
1488                         return true;
1489                 }
1490         }
1491
1492         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1493             c == '%' || c == '_' || c == '^') {
1494                 cur.niceInsert(createInsetMath(docstring(1, c)));
1495                 return true;
1496         }
1497
1498
1499         // try auto-correction
1500         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1501         //      return true;
1502
1503         // no special circumstances, so insert the character without any fuss
1504         cur.insert(c);
1505         cur.autocorrect() = true;
1506         return true;
1507 }
1508
1509
1510 bool InsetMathNest::interpretString(Cursor & cur, docstring const & str)
1511 {
1512         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1513         // possible
1514         if (!cur.empty() && cur.pos() > 0 &&
1515             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1516                 if (InsetMathBig::isBigInsetDelim(str)) {
1517                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1518                         if (prev[0] == '\\') {
1519                                 prev = prev.substr(1);
1520                                 latexkeys const * l = in_word_set(prev);
1521                                 if (l && l->inset == "big") {
1522                                         cur.cell()[cur.pos() - 1] =
1523                                                 MathAtom(new InsetMathBig(prev, str));
1524                                         return true;
1525                                 }
1526                         }
1527                 }
1528         }
1529         return false;
1530 }
1531
1532
1533 bool InsetMathNest::script(Cursor & cur, bool up,
1534                 docstring const & save_selection)
1535 {
1536         // Hack to get \^ and \_ working
1537         //lyxerr << "handling script: up: " << up << endl;
1538         if (cur.inMacroMode() && cur.macroName() == "\\") {
1539                 if (up)
1540                         cur.niceInsert(createInsetMath("mathcircumflex"));
1541                 else
1542                         interpretChar(cur, '_');
1543                 return true;
1544         }
1545
1546         cur.macroModeClose();
1547         if (asScriptInset() && cur.idx() == 0) {
1548                 // we are in a nucleus of a script inset, move to _our_ script
1549                 InsetMathScript * inset = asScriptInset();
1550                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1551                 inset->ensure(up);
1552                 cur.idx() = inset->idxOfScript(up);
1553                 cur.pos() = 0;
1554         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1555                 --cur.pos();
1556                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1557                 cur.push(*inset);
1558                 inset->ensure(up);
1559                 cur.idx() = inset->idxOfScript(up);
1560                 cur.pos() = cur.lastpos();
1561         } else {
1562                 // convert the thing to our left to a scriptinset or create a new
1563                 // one if in the very first position of the array
1564                 if (cur.pos() == 0) {
1565                         //lyxerr << "new scriptinset" << endl;
1566                         cur.insert(new InsetMathScript(up));
1567                 } else {
1568                         //lyxerr << "converting prev atom " << endl;
1569                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1570                 }
1571                 --cur.pos();
1572                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1573                 // See comment in MathParser.cpp for special handling of {}-bases
1574
1575                 cur.push(*inset);
1576                 cur.idx() = 1;
1577                 cur.pos() = 0;
1578         }
1579         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1580         cur.niceInsert(save_selection);
1581         cur.resetAnchor();
1582         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1583         return true;
1584 }
1585
1586
1587 } // namespace lyx