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 #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         pi.pain.setDrawingEnabled(false);
 250         draw(pi, x, y);
 251         pi.pain.setDrawingEnabled(true);
 252
 253         CursorSlice s1 = cur.selBegin();
 254         CursorSlice s2 = cur.selEnd();
 255
 256         //lyxerr << "InsetMathNest::drawing selection: "
 257         //      << " s1: " << s1 << " s2: " << s2 << endl;
 258         if (s1.idx() == s2.idx()) {
 259                 MathData const & c = cell(s1.idx());
 260                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 261                 int x1 = g.pos.x_ + c.pos2x(s1.pos());
 262                 int y1 = g.pos.y_ - g.dim.ascent();
 263                 int x2 = g.pos.x_ + c.pos2x(s2.pos());
 264                 int y2 = g.pos.y_ + g.dim.descent();
 265                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color_selection);
 266         //lyxerr << "InsetMathNest::drawing selection 3: "
 267         //      << " x1: " << x1 << " x2: " << x2
 268         //      << " y1: " << y1 << " y2: " << y2 << endl;
 269         } else {
 270                 for (idx_type i = 0; i < nargs(); ++i) {
 271                         if (idxBetween(i, s1.idx(), s2.idx())) {
 272                                 MathData const & c = cell(i);
 273                                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 274                                 int x1 = g.pos.x_;
 275                                 int y1 = g.pos.y_ - g.dim.ascent();
 276                                 int x2 = g.pos.x_ + g.dim.width();
 277                                 int y2 = g.pos.y_ + g.dim.descent();
 278                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color_selection);
 279                         }
 280                 }
 281         }
 282 }
 283
 284
 285 void InsetMathNest::validate(LaTeXFeatures & features) const
 286 {
 287         for (idx_type i = 0; i < nargs(); ++i)
 288                 cell(i).validate(features);
 289 }
 290
 291
 292 void InsetMathNest::replace(ReplaceData & rep)
 293 {
 294         for (idx_type i = 0; i < nargs(); ++i)
 295                 cell(i).replace(rep);
 296 }
 297
 298
 299 bool InsetMathNest::contains(MathData const & ar) const
 300 {
 301         for (idx_type i = 0; i < nargs(); ++i)
 302                 if (cell(i).contains(ar))
 303                         return true;
 304         return false;
 305 }
 306
 307
 308 bool InsetMathNest::lock() const
 309 {
 310         return lock_;
 311 }
 312
 313
 314 void InsetMathNest::lock(bool l)
 315 {
 316         lock_ = l;
 317 }
 318
 319
 320 bool InsetMathNest::isActive() const
 321 {
 322         return nargs() > 0;
 323 }
 324
 325
 326 MathData InsetMathNest::glue() const
 327 {
 328         MathData ar;
 329         for (size_t i = 0; i < nargs(); ++i)
 330                 ar.append(cell(i));
 331         return ar;
 332 }
 333
 334
 335 void InsetMathNest::write(WriteStream & os) const
 336 {
 337         os << '\\' << name().c_str();
 338         for (size_t i = 0; i < nargs(); ++i)
 339                 os << '{' << cell(i) << '}';
 340         if (nargs() == 0)
 341                 os.pendingSpace(true);
 342         if (lock_ && !os.latex()) {
 343                 os << "\\lyxlock";
 344                 os.pendingSpace(true);
 345         }
 346 }
 347
 348
 349 void InsetMathNest::normalize(NormalStream & os) const
 350 {
 351         os << '[' << name().c_str();
 352         for (size_t i = 0; i < nargs(); ++i)
 353                 os << ' ' << cell(i);
 354         os << ']';
 355 }
 356
 357
 358 int InsetMathNest::latex(Buffer const &, odocstream & os,
 359                         OutputParams const & runparams) const
 360 {
 361         WriteStream wi(os, runparams.moving_arg, true);
 362         write(wi);
 363         return wi.line();
 364 }
 365
 366
 367 bool InsetMathNest::setMouseHover(bool mouse_hover)
 368 {
 369         mouse_hover_ = mouse_hover;
 370         return true;
 371 }
 372
 373
 374 bool InsetMathNest::notifyCursorLeaves(Cursor & /*cur*/)
 375 {
 376         // FIXME: look here
 377 #if 0
 378         MathData & ar = cur.cell();
 379         // remove base-only "scripts"
 380         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 381                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 382                 if (p && p->nargs() == 1) {
 383                         MathData ar = p->nuc();
 384                         erase(i);
 385                         insert(i, ar);
 386                         cur.adjust(i, ar.size() - 1);
 387                 }
 388         }
 389
 390         // glue adjacent font insets of the same kind
 391         for (pos_type i = 0; i + 1 < size(); ++i) {
 392                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 393                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 394                 if (p && q && p->name() == q->name()) {
 395                         p->cell(0).append(q->cell(0));
 396                         erase(i + 1);
 397                         cur.adjust(i, -1);
 398                 }
 399         }
 400 #endif
 401         return false;
 402 }
 403
 404
 405 void InsetMathNest::handleFont
 406         (Cursor & cur, docstring const & arg, char const * const font)
 407 {
 408         handleFont(cur, arg, from_ascii(font));
 409 }
 410
 411
 412 void InsetMathNest::handleFont
 413         (Cursor & cur, docstring const & arg, docstring const & font)
 414 {
 415         // this whole function is a hack and won't work for incremental font
 416         // changes...
 417
 418         if (cur.inset().asInsetMath()->name() == font) {
 419                 cur.recordUndoInset();
 420                 cur.handleFont(to_utf8(font));
 421         } else {
 422                 cur.recordUndo();
 423                 cur.handleNest(createInsetMath(font));
 424                 cur.insert(arg);
 425         }
 426 }
 427
 428
 429 void InsetMathNest::handleFont2(Cursor & cur, docstring const & arg)
 430 {
 431         cur.recordUndo();
 432         Font font;
 433         bool b;
 434         font.fromString(to_utf8(arg), b);
 435         if (font.fontInfo().color() != Color_inherit) {
 436                 MathAtom at = MathAtom(new InsetMathColor(true, font.fontInfo().color()));
 437                 cur.handleNest(at, 0);
 438         }
 439 }
 440
 441
 442 void InsetMathNest::doDispatch(Cursor & cur, FuncRequest & cmd)
 443 {
 444         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 445         //CursorSlice sl = cur.current();
 446
 447         switch (cmd.action) {
 448
 449         case LFUN_PASTE: {
 450                 cur.recordUndo();
 451                 cur.message(_("Paste"));
 452                 replaceSelection(cur);
 453                 docstring topaste;
 454                 if (cmd.argument().empty() && !theClipboard().isInternal())
 455                         topaste = theClipboard().getAsText();
 456                 else {
 457                         size_t n = 0;
 458                         idocstringstream is(cmd.argument());
 459                         is >> n;
 460                         topaste = cap::getSelection(cur.buffer(), n);
 461                 }
 462                 cur.niceInsert(topaste);
 463                 cur.clearSelection(); // bug 393
 464                 cur.finishUndo();
 465                 break;
 466         }
 467
 468         case LFUN_CUT:
 469                 cur.recordUndo();
 470                 cutSelection(cur, true, true);
 471                 cur.message(_("Cut"));
 472                 // Prevent stale position >= size crash
 473                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 474                 cur.normalize();
 475                 break;
 476
 477         case LFUN_COPY:
 478                 copySelection(cur);
 479                 cur.message(_("Copy"));
 480                 break;
 481
 482         case LFUN_MOUSE_PRESS:
 483                 lfunMousePress(cur, cmd);
 484                 break;
 485
 486         case LFUN_MOUSE_MOTION:
 487                 lfunMouseMotion(cur, cmd);
 488                 break;
 489
 490         case LFUN_MOUSE_RELEASE:
 491                 lfunMouseRelease(cur, cmd);
 492                 break;
 493
 494         case LFUN_FINISHED_BACKWARD:
 495                 cur.bv().cursor() = cur;
 496                 break;
 497
 498         case LFUN_FINISHED_FORWARD:
 499                 ++cur.pos();
 500                 cur.bv().cursor() = cur;
 501                 break;
 502
 503         case LFUN_CHAR_FORWARD:
 504                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 505         case LFUN_CHAR_FORWARD_SELECT:
 506                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 507                 cur.autocorrect() = false;
 508                 cur.clearTargetX();
 509                 cur.macroModeClose();
 510                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 511                         cur.pushBackward(*cur.nextAtom().nucleus());
 512                         cur.inset().idxFirst(cur);
 513                 } else if (cur.posForward() || idxForward(cur)
 514                         || cur.popForward() || cur.selection())
 515                         ;
 516                 else {
 517                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 518                         cur.undispatched();
 519                 }
 520                 break;
 521
 522         case LFUN_CHAR_BACKWARD:
 523                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 524         case LFUN_CHAR_BACKWARD_SELECT:
 525                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 526                 cur.autocorrect() = false;
 527                 cur.clearTargetX();
 528                 cur.macroModeClose();
 529                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 530                         cur.posBackward();
 531                         cur.push(*cur.nextAtom().nucleus());
 532                         cur.inset().idxLast(cur);
 533                 } else if (cur.posBackward() || idxBackward(cur)
 534                         || cur.popBackward() || cur.selection())
 535                         ;
 536                 else {
 537                         cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 538                         cur.undispatched();
 539                 }
 540                 break;
 541
 542         case LFUN_CHAR_RIGHT:
 543         case LFUN_CHAR_RIGHT_SELECT:
 544                 //FIXME: for visual cursor, really move right
 545                 if (reverseDirectionNeeded(cur))
 546                         doDispatch(cur, FuncRequest(cmd.action == LFUN_CHAR_RIGHT_SELECT ?
 547                                         LFUN_CHAR_BACKWARD_SELECT : LFUN_CHAR_BACKWARD));
 548                 else
 549                         doDispatch(cur, FuncRequest(cmd.action == LFUN_CHAR_RIGHT_SELECT ?
 550                                         LFUN_CHAR_FORWARD_SELECT : LFUN_CHAR_FORWARD));
 551                 break;
 552
 553         case LFUN_CHAR_LEFT:
 554         case LFUN_CHAR_LEFT_SELECT:
 555                 //FIXME: for visual cursor, really move left
 556                 if (reverseDirectionNeeded(cur))
 557                         doDispatch(cur, FuncRequest(cmd.action == LFUN_CHAR_LEFT_SELECT ?
 558                                         LFUN_CHAR_FORWARD_SELECT : LFUN_CHAR_FORWARD));
 559                 else
 560                         doDispatch(cur, FuncRequest(cmd.action == LFUN_CHAR_LEFT_SELECT ?
 561                                         LFUN_CHAR_BACKWARD_SELECT : LFUN_CHAR_BACKWARD));
 562                 break;
 563
 564         case LFUN_DOWN:
 565         case LFUN_UP:
 566                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 567         case LFUN_DOWN_SELECT:
 568         case LFUN_UP_SELECT: {
 569                 // close active macro
 570                 if (cur.inMacroMode()) {
 571                         cur.macroModeClose();
 572                         break;
 573                 }
 574
 575                 // stop/start the selection
 576                 bool select = cmd.action == LFUN_DOWN_SELECT ||
 577                         cmd.action == LFUN_UP_SELECT;
 578                 cur.selHandle(select);
 579
 580                 // go up/down
 581                 bool up = cmd.action == LFUN_UP || cmd.action == LFUN_UP_SELECT;
 582                 bool successful = cur.upDownInMath(up);
 583                 if (successful) {
 584                         // notify left insets and give them chance to set update flags
 585                         lyx::notifyCursorLeaves(cur.beforeDispatchCursor(), cur);
 586                         cur.fixIfBroken();
 587                         break;
 588                 }
 589
 590                 if (cur.fixIfBroken())
 591                         // FIXME: Something bad happened. We pass the corrected Cursor
 592                         // instead of letting things go worse.
 593                         break;
 594
 595                 // We did not manage to move the cursor.
 596                 cur.undispatched();
 597                 break;
 598         }
 599
 600         case LFUN_MOUSE_DOUBLE:
 601         case LFUN_MOUSE_TRIPLE:
 602         case LFUN_WORD_SELECT:
 603                 cur.pos() = 0;
 604                 cur.idx() = 0;
 605                 cur.resetAnchor();
 606                 cur.selection() = true;
 607                 cur.pos() = cur.lastpos();
 608                 cur.idx() = cur.lastidx();
 609                 break;
 610
 611         case LFUN_PARAGRAPH_UP:
 612         case LFUN_PARAGRAPH_DOWN:
 613                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 614         case LFUN_PARAGRAPH_UP_SELECT:
 615         case LFUN_PARAGRAPH_DOWN_SELECT:
 616                 break;
 617
 618         case LFUN_LINE_BEGIN:
 619         case LFUN_WORD_BACKWARD:
 620         case LFUN_WORD_LEFT:
 621                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 622         case LFUN_LINE_BEGIN_SELECT:
 623         case LFUN_WORD_BACKWARD_SELECT:
 624         case LFUN_WORD_LEFT_SELECT:
 625                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 626                                 cmd.action == LFUN_WORD_LEFT_SELECT ||
 627                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 628                 cur.macroModeClose();
 629                 if (cur.pos() != 0) {
 630                         cur.pos() = 0;
 631                 } else if (cur.col() != 0) {
 632                         cur.idx() -= cur.col();
 633                         cur.pos() = 0;
 634                 } else if (cur.idx() != 0) {
 635                         cur.idx() = 0;
 636                         cur.pos() = 0;
 637                 } else {
 638                         cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 639                         cur.undispatched();
 640                 }
 641                 break;
 642
 643         case LFUN_WORD_FORWARD:
 644         case LFUN_WORD_RIGHT:
 645         case LFUN_LINE_END:
 646                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 647         case LFUN_WORD_FORWARD_SELECT:
 648         case LFUN_WORD_RIGHT_SELECT:
 649         case LFUN_LINE_END_SELECT:
 650                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 651                                 cmd.action == LFUN_WORD_RIGHT_SELECT ||
 652                                 cmd.action == LFUN_LINE_END_SELECT);
 653                 cur.macroModeClose();
 654                 cur.clearTargetX();
 655                 if (cur.pos() != cur.lastpos()) {
 656                         cur.pos() = cur.lastpos();
 657                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 658                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 659                         cur.pos() = cur.lastpos();
 660                 } else if (cur.idx() != cur.lastidx()) {
 661                         cur.idx() = cur.lastidx();
 662                         cur.pos() = cur.lastpos();
 663                 } else {
 664                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 665                         cur.undispatched();
 666                 }
 667                 break;
 668
 669         case LFUN_SCREEN_UP_SELECT:
 670                 cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 671                 cur.undispatched();
 672                 break;
 673
 674         case LFUN_SCREEN_DOWN_SELECT:
 675                 cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 676                 cur.undispatched();
 677                 break;
 678
 679         case LFUN_CELL_FORWARD:
 680                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 681                 cur.inset().idxNext(cur);
 682                 break;
 683
 684         case LFUN_CELL_BACKWARD:
 685                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 686                 cur.inset().idxPrev(cur);
 687                 break;
 688
 689         case LFUN_WORD_DELETE_BACKWARD:
 690         case LFUN_CHAR_DELETE_BACKWARD:
 691                 if (cur.pos() == 0)
 692                         // May affect external cell:
 693                         cur.recordUndoInset();
 694                 else
 695                         cur.recordUndo();
 696                 // if the inset can not be removed from within, delete it
 697                 if (!cur.backspace()) {
 698                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 699                         cur.innerText()->dispatch(cur, cmd);
 700                 }
 701                 break;
 702
 703         case LFUN_WORD_DELETE_FORWARD:
 704         case LFUN_CHAR_DELETE_FORWARD:
 705                 if (cur.pos() == cur.lastpos())
 706                         // May affect external cell:
 707                         cur.recordUndoInset();
 708                 else
 709                         cur.recordUndo();
 710                 // if the inset can not be removed from within, delete it
 711                 if (!cur.erase()) {
 712                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 713                         cur.innerText()->dispatch(cur, cmd);
 714                 }
 715                 break;
 716
 717         case LFUN_ESCAPE:
 718                 if (cur.selection())
 719                         cur.clearSelection();
 720                 else  {
 721                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 722                         cur.undispatched();
 723                 }
 724                 break;
 725
 726         case LFUN_INSET_TOGGLE:
 727                 cur.recordUndo();
 728                 lock(!lock());
 729                 cur.popForward();
 730                 break;
 731
 732         case LFUN_SELF_INSERT:
 733                 if (cmd.argument().size() != 1) {
 734                         cur.recordUndo();
 735                         docstring const arg = cmd.argument();
 736                         if (!interpretString(cur, arg))
 737                                 cur.insert(arg);
 738                         break;
 739                 }
 740                 // Don't record undo steps if we are in macro mode and
 741                 // cmd.argument is the next character of the macro name.
 742                 // Otherwise we'll get an invalid cursor if we undo after
 743                 // the macro was finished and the macro is a known command,
 744                 // e.g. sqrt. Cursor::macroModeClose replaces in this case
 745                 // the InsetMathUnknown with name "frac" by an empty
 746                 // InsetMathFrac -> a pos value > 0 is invalid.
 747                 // A side effect is that an undo before the macro is finished
 748                 // undoes the complete macro, not only the last character.
 749                 if (!cur.inMacroMode())
 750                         cur.recordUndo();
 751
 752                 // spacial handling of space. If we insert an inset
 753                 // via macro mode, we want to put the cursor inside it
 754                 // if relevant. Think typing "\frac<space>".
 755                 if (cmd.argument()[0] == ' '
 756                     && cur.inMacroMode() && cur.macroName() != "\\"
 757                     && cur.macroModeClose()) {
 758                         MathAtom const atom = cur.prevAtom();
 759                         if (atom->asNestInset() && atom->isActive()) {
 760                                 cur.posBackward();
 761                                 cur.pushBackward(*cur.nextInset());
 762                         }
 763                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 764                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 765                         cur.undispatched();
 766                 }
 767                 break;
 768
 769         //case LFUN_SERVER_GET_XY:
 770         //      sprintf(dispatch_buffer, "%d %d",);
 771         //      break;
 772
 773         case LFUN_SERVER_SET_XY: {
 774                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 775                 int x = 0;
 776                 int y = 0;
 777                 istringstream is(to_utf8(cmd.argument()));
 778                 is >> x >> y;
 779                 cur.setScreenPos(x, y);
 780                 break;
 781         }
 782
 783         // Special casing for superscript in case of LyX handling
 784         // dead-keys:
 785         case LFUN_ACCENT_CIRCUMFLEX:
 786                 if (cmd.argument().empty()) {
 787                         // do superscript if LyX handles
 788                         // deadkeys
 789                         cur.recordUndo();
 790                         script(cur, true, grabAndEraseSelection(cur));
 791                 }
 792                 break;
 793
 794         case LFUN_ACCENT_UMLAUT:
 795         case LFUN_ACCENT_ACUTE:
 796         case LFUN_ACCENT_GRAVE:
 797         case LFUN_ACCENT_BREVE:
 798         case LFUN_ACCENT_DOT:
 799         case LFUN_ACCENT_MACRON:
 800         case LFUN_ACCENT_CARON:
 801         case LFUN_ACCENT_TILDE:
 802         case LFUN_ACCENT_CEDILLA:
 803         case LFUN_ACCENT_CIRCLE:
 804         case LFUN_ACCENT_UNDERDOT:
 805         case LFUN_ACCENT_TIE:
 806         case LFUN_ACCENT_OGONEK:
 807         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 808                 break;
 809
 810         //  Math fonts
 811         case LFUN_FONT_FREE_APPLY:
 812         case LFUN_FONT_FREE_UPDATE:
 813                 handleFont2(cur, cmd.argument());
 814                 break;
 815
 816         case LFUN_FONT_BOLD:
 817                 if (currentMode() == TEXT_MODE)
 818                         handleFont(cur, cmd.argument(), "textbf");
 819                 else
 820                         handleFont(cur, cmd.argument(), "mathbf");
 821                 break;
 822         case LFUN_FONT_SANS:
 823                 if (currentMode() == TEXT_MODE)
 824                         handleFont(cur, cmd.argument(), "textsf");
 825                 else
 826                         handleFont(cur, cmd.argument(), "mathsf");
 827                 break;
 828         case LFUN_FONT_EMPH:
 829                 if (currentMode() == TEXT_MODE)
 830                         handleFont(cur, cmd.argument(), "emph");
 831                 else
 832                         handleFont(cur, cmd.argument(), "mathcal");
 833                 break;
 834         case LFUN_FONT_ROMAN:
 835                 if (currentMode() == TEXT_MODE)
 836                         handleFont(cur, cmd.argument(), "textrm");
 837                 else
 838                         handleFont(cur, cmd.argument(), "mathrm");
 839                 break;
 840         case LFUN_FONT_TYPEWRITER:
 841                 if (currentMode() == TEXT_MODE)
 842                         handleFont(cur, cmd.argument(), "texttt");
 843                 else
 844                         handleFont(cur, cmd.argument(), "mathtt");
 845                 break;
 846         case LFUN_FONT_FRAK:
 847                 handleFont(cur, cmd.argument(), "mathfrak");
 848                 break;
 849         case LFUN_FONT_ITAL:
 850                 if (currentMode() == TEXT_MODE)
 851                         handleFont(cur, cmd.argument(), "textit");
 852                 else
 853                         handleFont(cur, cmd.argument(), "mathit");
 854                 break;
 855         case LFUN_FONT_NOUN:
 856                 if (currentMode() == TEXT_MODE)
 857                         // FIXME: should be "noun"
 858                         handleFont(cur, cmd.argument(), "textsc");
 859                 else
 860                         handleFont(cur, cmd.argument(), "mathbb");
 861                 break;
 862         /*
 863         case LFUN_FONT_FREE_APPLY:
 864                 handleFont(cur, cmd.argument(), "textrm");
 865                 break;
 866         */
 867         case LFUN_FONT_DEFAULT:
 868                 handleFont(cur, cmd.argument(), "textnormal");
 869                 break;
 870
 871         case LFUN_MATH_MODE: {
 872 #if 1
 873                 // ignore math-mode on when already in math mode
 874                 if (currentMode() == Inset::MATH_MODE && cmd.argument() == "on")
 875                         break;
 876                 cur.macroModeClose();
 877                 docstring const save_selection = grabAndEraseSelection(cur);
 878                 selClearOrDel(cur);
 879                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 880                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 881                 cur.posBackward();
 882                 cur.pushBackward(*cur.nextInset());
 883                 cur.niceInsert(save_selection);
 884 #else
 885                 if (currentMode() == Inset::TEXT_MODE) {
 886                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 887                         cur.message(_("create new math text environment ($...$)"));
 888                 } else {
 889                         handleFont(cur, cmd.argument(), "textrm");
 890                         cur.message(_("entered math text mode (textrm)"));
 891                 }
 892 #endif
 893                 break;
 894         }
 895
 896         case LFUN_MATH_SIZE:
 897 #if 0
 898                 cur.recordUndo();
 899                 cur.setSize(arg);
 900 #endif
 901                 break;
 902
 903         case LFUN_MATH_MATRIX: {
 904                 cur.recordUndo();
 905                 unsigned int m = 1;
 906                 unsigned int n = 1;
 907                 docstring v_align;
 908                 docstring h_align;
 909                 idocstringstream is(cmd.argument());
 910                 is >> m >> n >> v_align >> h_align;
 911                 if (m < 1)
 912                         m = 1;
 913                 if (n < 1)
 914                         n = 1;
 915                 v_align += 'c';
 916                 cur.niceInsert(
 917                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 918                 break;
 919         }
 920
 921         case LFUN_MATH_DELIM: {
 922                 docstring ls;
 923                 docstring rs = support::split(cmd.argument(), ls, ' ');
 924                 // Reasonable default values
 925                 if (ls.empty())
 926                         ls = '(';
 927                 if (rs.empty())
 928                         rs = ')';
 929                 cur.recordUndo();
 930                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 931                 break;
 932         }
 933
 934         case LFUN_MATH_BIGDELIM: {
 935                 docstring const lname  = from_utf8(cmd.getArg(0));
 936                 docstring const ldelim = from_utf8(cmd.getArg(1));
 937                 docstring const rname  = from_utf8(cmd.getArg(2));
 938                 docstring const rdelim = from_utf8(cmd.getArg(3));
 939                 latexkeys const * l = in_word_set(lname);
 940                 bool const have_l = l && l->inset == "big" &&
 941                                     InsetMathBig::isBigInsetDelim(ldelim);
 942                 l = in_word_set(rname);
 943                 bool const have_r = l && l->inset == "big" &&
 944                                     InsetMathBig::isBigInsetDelim(rdelim);
 945                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 946                 // or right delimiter.
 947                 if (have_l || have_r) {
 948                         cur.recordUndo();
 949                         docstring const selection = grabAndEraseSelection(cur);
 950                         selClearOrDel(cur);
 951                         if (have_l)
 952                                 cur.insert(MathAtom(new InsetMathBig(lname,
 953                                                                 ldelim)));
 954                         cur.niceInsert(selection);
 955                         if (have_r)
 956                                 cur.insert(MathAtom(new InsetMathBig(rname,
 957                                                                 rdelim)));
 958                 }
 959                 // Don't call cur.undispatched() if we did nothing, this would
 960                 // lead to infinite recursion via Text::dispatch().
 961                 break;
 962         }
 963
 964         case LFUN_SPACE_INSERT:
 965         case LFUN_MATH_SPACE:
 966                 cur.recordUndo();
 967                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 968                 break;
 969
 970         case LFUN_ERT_INSERT:
 971                 // interpret this as if a backslash was typed
 972                 cur.recordUndo();
 973                 interpretChar(cur, '\\');
 974                 break;
 975
 976         case LFUN_MATH_SUBSCRIPT:
 977                 // interpret this as if a _ was typed
 978                 cur.recordUndo();
 979                 interpretChar(cur, '_');
 980                 break;
 981
 982         case LFUN_MATH_SUPERSCRIPT:
 983                 // interpret this as if a ^ was typed
 984                 cur.recordUndo();
 985                 interpretChar(cur, '^');
 986                 break;
 987
 988         case LFUN_MATH_MACRO_FOLD:
 989         case LFUN_MATH_MACRO_UNFOLD: {
 990                 Cursor it = cur;
 991                 bool fold = cmd.action == LFUN_MATH_MACRO_FOLD;
 992                 bool found = findMacroToFoldUnfold(it, fold);
 993                 if (found) {
 994                         cur.recordUndo();
 995                         if (fold)
 996                                 it.nextInset()->asInsetMath()->asMacro()->fold(cur);
 997                         else
 998                                 it.nextInset()->asInsetMath()->asMacro()->unfold(cur);
 999                 }\v
1000                 break;
1001         }
1002
1003         case LFUN_QUOTE_INSERT:
1004                 // interpret this as if a straight " was typed
1005                 cur.recordUndo();
1006                 interpretChar(cur, '\"');
1007                 break;
1008
1009 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
1010 // handling such that "self-insert" works on "arbitrary stuff" too, and
1011 // math-insert only handles special math things like "matrix".
1012         case LFUN_MATH_INSERT: {
1013                 cur.recordUndo();
1014                 if (cmd.argument() == "^" || cmd.argument() == "_") {
1015                         interpretChar(cur, cmd.argument()[0]);
1016                 } else
1017                         cur.niceInsert(cmd.argument());
1018                 break;
1019                 }
1020
1021         case LFUN_DIALOG_SHOW_NEW_INSET: {
1022                 docstring const & name = cmd.argument();
1023                 string data;
1024                 if (name == "ref") {
1025                         InsetMathRef tmp(name);
1026                         data = tmp.createDialogStr(to_utf8(name));
1027                 }
1028                 cur.bv().showInsetDialog(to_utf8(name), data, 0);
1029                 break;
1030         }
1031
1032         case LFUN_INSET_INSERT: {
1033                 MathData ar;
1034                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
1035                         cur.recordUndo();
1036                         cur.insert(ar);
1037                 } else
1038                         cur.undispatched();
1039                 break;
1040         }
1041         case LFUN_INSET_DISSOLVE:
1042                 if (!asHullInset()) {
1043                         cur.recordUndoInset();
1044                         cur.pullArg();
1045                 }
1046                 break;
1047
1048         default:
1049                 InsetMath::doDispatch(cur, cmd);
1050                 break;
1051         }
1052 }
1053
1054
1055 bool InsetMathNest::findMacroToFoldUnfold(Cursor & it, bool fold) const {
1056         // look for macro to open/close, but stay in mathed
1057         for (; !it.empty(); it.pop_back()) {
1058
1059                 // go backward through the current cell
1060                 Inset * inset = it.nextInset();
1061                 while (inset && inset->asInsetMath()) {
1062                         MathMacro * macro = inset->asInsetMath()->asMacro();
1063                         if (macro) {
1064                                 // found the an macro to open/close?
1065                                 if (macro->folded() != fold)
1066                                         return true;
1067
1068                                 // Wrong folding state.
1069                                 // If this was the first we see in this slice, look further left,
1070                                 // otherwise go up.
1071                                 if (inset != it.nextInset())
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.popForward()) {
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