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 "DispatchResult.h"
  42 #include "FuncRequest.h"
  43 #include "FuncStatus.h"
  44 #include "LyXFunc.h"
  45 #include "LyXRC.h"
  46 #include "OutputParams.h"
  47 #include "Text.h"
  48
  49 #include "frontends/Clipboard.h"
  50 #include "frontends/Painter.h"
  51 #include "frontends/Selection.h"
  52
  53 #include "support/debug.h"
  54 #include "support/gettext.h"
  55 #include "support/lstrings.h"
  56 #include "support/textutils.h"
  57 #include "support/docstream.h"
  58
  59 #include <sstream>
  60
  61 using namespace std;
  62 using namespace lyx::support;
  63
  64 namespace lyx {
  65
  66 using cap::copySelection;
  67 using cap::grabAndEraseSelection;
  68 using cap::cutSelection;
  69 using cap::replaceSelection;
  70 using cap::selClearOrDel;
  71
  72
  73 InsetMathNest::InsetMathNest(idx_type nargs)
  74         : cells_(nargs), lock_(false), mouse_hover_(false)
  75 {}
  76
  77
  78 InsetMathNest::InsetMathNest(InsetMathNest const & inset)
  79         : InsetMath(inset), cells_(inset.cells_), lock_(inset.lock_),
  80           mouse_hover_(false)
  81 {}
  82
  83
  84 InsetMathNest & InsetMathNest::operator=(InsetMathNest const & inset)
  85 {
  86         cells_ = inset.cells_;
  87         lock_ = inset.lock_;
  88         mouse_hover_ = false;
  89         InsetMath::operator=(inset);
  90         return *this;
  91 }
  92
  93
  94 InsetMath::idx_type InsetMathNest::nargs() const
  95 {
  96         return cells_.size();
  97 }
  98
  99
 100 void InsetMathNest::cursorPos(BufferView const & bv,
 101                 CursorSlice const & sl, bool /*boundary*/,
 102                 int & x, int & y) const
 103 {
 104 // FIXME: This is a hack. Ideally, the coord cache should not store
 105 // absolute positions, but relative ones. This would mean to call
 106 // setXY() not in MathData::draw(), but in the parent insets' draw()
 107 // with the correctly adjusted x,y values. But this means that we'd have
 108 // to touch all (math)inset's draw() methods. Right now, we'll store
 109 // absolute value, and make them here relative, only to make them
 110 // absolute again when actually drawing the cursor. What a mess.
 111         BOOST_ASSERT(&sl.inset() == this);
 112         MathData const & ar = sl.cell();
 113         CoordCache const & coord_cache = bv.coordCache();
 114         if (!coord_cache.getArrays().has(&ar)) {
 115                 // this can (semi-)legally happen if we just created this cell
 116                 // and it never has been drawn before. So don't ASSERT.
 117                 //lyxerr << "no cached data for array " << &ar << endl;
 118                 x = 0;
 119                 y = 0;
 120                 return;
 121         }
 122         Point const pt = coord_cache.getArrays().xy(&ar);
 123         if (!coord_cache.getInsets().has(this)) {
 124                 // same as above
 125                 //lyxerr << "no cached data for inset " << this << endl;
 126                 x = 0;
 127                 y = 0;
 128                 return;
 129         }
 130         Point const pt2 = coord_cache.getInsets().xy(this);
 131         //lyxerr << "retrieving position cache for MathData "
 132         //      << pt.x_ << ' ' << pt.y_ << endl;
 133         x = pt.x_ - pt2.x_ + ar.pos2x(&bv, sl.pos());
 134         y = pt.y_ - pt2.y_;
 135 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 136 //              << " asc: " << ascent() << "  des: " << descent()
 137 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 138         // move cursor visually into empty cells ("blue rectangles");
 139         if (ar.empty())
 140                 x += 2;
 141 }
 142
 143
 144 void InsetMathNest::metrics(MetricsInfo const & mi) const
 145 {
 146         MetricsInfo m = mi;
 147         for (idx_type i = 0, n = nargs(); i != n; ++i) {
 148                 Dimension dim;
 149                 cell(i).metrics(m, dim);
 150         }
 151 }
 152
 153
 154 bool InsetMathNest::idxNext(Cursor & cur) const
 155 {
 156         BOOST_ASSERT(&cur.inset() == this);
 157         if (cur.idx() == cur.lastidx())
 158                 return false;
 159         ++cur.idx();
 160         cur.pos() = 0;
 161         return true;
 162 }
 163
 164
 165 bool InsetMathNest::idxForward(Cursor & cur) const
 166 {
 167         return idxNext(cur);
 168 }
 169
 170
 171 bool InsetMathNest::idxPrev(Cursor & cur) const
 172 {
 173         BOOST_ASSERT(&cur.inset() == this);
 174         if (cur.idx() == 0)
 175                 return false;
 176         --cur.idx();
 177         cur.pos() = cur.lastpos();
 178         return true;
 179 }
 180
 181
 182 bool InsetMathNest::idxBackward(Cursor & cur) const
 183 {
 184         return idxPrev(cur);
 185 }
 186
 187
 188 bool InsetMathNest::idxFirst(Cursor & cur) const
 189 {
 190         BOOST_ASSERT(&cur.inset() == this);
 191         if (nargs() == 0)
 192                 return false;
 193         cur.idx() = 0;
 194         cur.pos() = 0;
 195         return true;
 196 }
 197
 198
 199 bool InsetMathNest::idxLast(Cursor & cur) const
 200 {
 201         BOOST_ASSERT(&cur.inset() == this);
 202         if (nargs() == 0)
 203                 return false;
 204         cur.idx() = cur.lastidx();
 205         cur.pos() = cur.lastpos();
 206         return true;
 207 }
 208
 209
 210 void InsetMathNest::dump() const
 211 {
 212         odocstringstream oss;
 213         WriteStream os(oss);
 214         os << "---------------------------------------------\n";
 215         write(os);
 216         os << "\n";
 217         for (idx_type i = 0, n = nargs(); i != n; ++i)
 218                 os << cell(i) << "\n";
 219         os << "---------------------------------------------\n";
 220         lyxerr << to_utf8(oss.str());
 221 }
 222
 223
 224 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 225 {
 226 #if 0
 227         if (lock_)
 228                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 229                                         Color_mathlockbg);
 230 #endif
 231         setPosCache(pi, x, y);
 232 }
 233
 234
 235 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 236 {
 237         BufferView & bv = *pi.base.bv;
 238         // this should use the x/y values given, not the cached values
 239         Cursor & cur = bv.cursor();
 240         if (!cur.selection())
 241                 return;
 242         if (&cur.inset() != this)
 243                 return;
 244
 245         // FIXME: hack to get position cache warm
 246         bool const original_drawing_state = pi.pain.isDrawingEnabled();
 247         pi.pain.setDrawingEnabled(false);
 248         draw(pi, x, y);
 249         pi.pain.setDrawingEnabled(original_drawing_state);
 250
 251         CursorSlice s1 = cur.selBegin();
 252         CursorSlice s2 = cur.selEnd();
 253
 254         //lyxerr << "InsetMathNest::drawing selection: "
 255         //      << " s1: " << s1 << " s2: " << s2 << endl;
 256         if (s1.idx() == s2.idx()) {
 257                 MathData const & c = cell(s1.idx());
 258                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 259                 int x1 = g.pos.x_ + c.pos2x(pi.base.bv, s1.pos());
 260                 int y1 = g.pos.y_ - g.dim.ascent();
 261                 int x2 = g.pos.x_ + c.pos2x(pi.base.bv, s2.pos());
 262                 int y2 = g.pos.y_ + g.dim.descent();
 263                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color_selection);
 264         //lyxerr << "InsetMathNest::drawing selection 3: "
 265         //      << " x1: " << x1 << " x2: " << x2
 266         //      << " y1: " << y1 << " y2: " << y2 << endl;
 267         } else {
 268                 for (idx_type i = 0; i < nargs(); ++i) {
 269                         if (idxBetween(i, s1.idx(), s2.idx())) {
 270                                 MathData const & c = cell(i);
 271                                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 272                                 int x1 = g.pos.x_;
 273                                 int y1 = g.pos.y_ - g.dim.ascent();
 274                                 int x2 = g.pos.x_ + g.dim.width();
 275                                 int y2 = g.pos.y_ + g.dim.descent();
 276                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color_selection);
 277                         }
 278                 }
 279         }
 280 }
 281
 282
 283 void InsetMathNest::validate(LaTeXFeatures & features) const
 284 {
 285         for (idx_type i = 0; i < nargs(); ++i)
 286                 cell(i).validate(features);
 287 }
 288
 289
 290 void InsetMathNest::replace(ReplaceData & rep)
 291 {
 292         for (idx_type i = 0; i < nargs(); ++i)
 293                 cell(i).replace(rep);
 294 }
 295
 296
 297 bool InsetMathNest::contains(MathData const & ar) const
 298 {
 299         for (idx_type i = 0; i < nargs(); ++i)
 300                 if (cell(i).contains(ar))
 301                         return true;
 302         return false;
 303 }
 304
 305
 306 bool InsetMathNest::lock() const
 307 {
 308         return lock_;
 309 }
 310
 311
 312 void InsetMathNest::lock(bool l)
 313 {
 314         lock_ = l;
 315 }
 316
 317
 318 bool InsetMathNest::isActive() const
 319 {
 320         return nargs() > 0;
 321 }
 322
 323
 324 MathData InsetMathNest::glue() const
 325 {
 326         MathData ar;
 327         for (size_t i = 0; i < nargs(); ++i)
 328                 ar.append(cell(i));
 329         return ar;
 330 }
 331
 332
 333 void InsetMathNest::write(WriteStream & os) const
 334 {
 335         os << '\\' << name().c_str();
 336         for (size_t i = 0; i < nargs(); ++i)
 337                 os << '{' << cell(i) << '}';
 338         if (nargs() == 0)
 339                 os.pendingSpace(true);
 340         if (lock_ && !os.latex()) {
 341                 os << "\\lyxlock";
 342                 os.pendingSpace(true);
 343         }
 344 }
 345
 346
 347 void InsetMathNest::normalize(NormalStream & os) const
 348 {
 349         os << '[' << name().c_str();
 350         for (size_t i = 0; i < nargs(); ++i)
 351                 os << ' ' << cell(i);
 352         os << ']';
 353 }
 354
 355
 356 int InsetMathNest::latex(Buffer const &, odocstream & os,
 357                         OutputParams const & runparams) const
 358 {
 359         WriteStream wi(os, runparams.moving_arg, true);
 360         write(wi);
 361         return wi.line();
 362 }
 363
 364
 365 bool InsetMathNest::setMouseHover(bool mouse_hover)
 366 {
 367         mouse_hover_ = mouse_hover;
 368         return true;
 369 }
 370
 371
 372 bool InsetMathNest::notifyCursorLeaves(Cursor & /*cur*/)
 373 {
 374         // FIXME: look here
 375 #if 0
 376         MathData & ar = cur.cell();
 377         // remove base-only "scripts"
 378         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 379                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 380                 if (p && p->nargs() == 1) {
 381                         MathData ar = p->nuc();
 382                         erase(i);
 383                         insert(i, ar);
 384                         cur.adjust(i, ar.size() - 1);
 385                 }
 386         }
 387
 388         // glue adjacent font insets of the same kind
 389         for (pos_type i = 0; i + 1 < size(); ++i) {
 390                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 391                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 392                 if (p && q && p->name() == q->name()) {
 393                         p->cell(0).append(q->cell(0));
 394                         erase(i + 1);
 395                         cur.adjust(i, -1);
 396                 }
 397         }
 398 #endif
 399         return false;
 400 }
 401
 402
 403 void InsetMathNest::handleFont
 404         (Cursor & cur, docstring const & arg, char const * const font)
 405 {
 406         handleFont(cur, arg, from_ascii(font));
 407 }
 408
 409
 410 void InsetMathNest::handleFont
 411         (Cursor & cur, docstring const & arg, docstring const & font)
 412 {
 413         // this whole function is a hack and won't work for incremental font
 414         // changes...
 415
 416         if (cur.inset().asInsetMath()->name() == font) {
 417                 cur.recordUndoInset();
 418                 cur.handleFont(to_utf8(font));
 419         } else {
 420                 cur.recordUndo();
 421                 cur.handleNest(createInsetMath(font));
 422                 cur.insert(arg);
 423         }
 424 }
 425
 426
 427 void InsetMathNest::handleFont2(Cursor & cur, docstring const & arg)
 428 {
 429         cur.recordUndo();
 430         Font font;
 431         bool b;
 432         font.fromString(to_utf8(arg), b);
 433         if (font.fontInfo().color() != Color_inherit) {
 434                 MathAtom at = MathAtom(new InsetMathColor(true, font.fontInfo().color()));
 435                 cur.handleNest(at, 0);
 436         }
 437 }
 438
 439
 440 void InsetMathNest::doDispatch(Cursor & cur, FuncRequest & cmd)
 441 {
 442         //lyxerr << "InsetMathNest: request: " << cmd << endl;
 443         //CursorSlice sl = cur.current();
 444
 445         switch (cmd.action) {
 446
 447         case LFUN_PASTE: {
 448                 cur.recordUndo();
 449                 cur.message(_("Paste"));
 450                 replaceSelection(cur);
 451                 docstring topaste;
 452                 if (cmd.argument().empty() && !theClipboard().isInternal())
 453                         topaste = theClipboard().getAsText();
 454                 else {
 455                         size_t n = 0;
 456                         idocstringstream is(cmd.argument());
 457                         is >> n;
 458                         topaste = cap::getSelection(cur.buffer(), n);
 459                 }
 460                 cur.niceInsert(topaste);
 461                 cur.clearSelection(); // bug 393
 462                 cur.finishUndo();
 463                 break;
 464         }
 465
 466         case LFUN_CUT:
 467                 cur.recordUndo();
 468                 cutSelection(cur, true, true);
 469                 cur.message(_("Cut"));
 470                 // Prevent stale position >= size crash
 471                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 472                 cur.normalize();
 473                 break;
 474
 475         case LFUN_COPY:
 476                 copySelection(cur);
 477                 cur.message(_("Copy"));
 478                 break;
 479
 480         case LFUN_MOUSE_PRESS:
 481                 lfunMousePress(cur, cmd);
 482                 break;
 483
 484         case LFUN_MOUSE_MOTION:
 485                 lfunMouseMotion(cur, cmd);
 486                 break;
 487
 488         case LFUN_MOUSE_RELEASE:
 489                 lfunMouseRelease(cur, cmd);
 490                 break;
 491
 492         case LFUN_FINISHED_LEFT: // in math, left is backwards
 493         case LFUN_FINISHED_BACKWARD:
 494                 cur.bv().cursor() = cur;
 495                 break;
 496
 497         case LFUN_FINISHED_RIGHT: // in math, right is forward
 498         case LFUN_FINISHED_FORWARD:
 499                 ++cur.pos();
 500                 cur.bv().cursor() = cur;
 501                 break;
 502
 503         case LFUN_CHAR_RIGHT:
 504         case LFUN_CHAR_LEFT:
 505         case LFUN_CHAR_BACKWARD:
 506         case LFUN_CHAR_FORWARD:
 507                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 508         case LFUN_CHAR_RIGHT_SELECT:
 509         case LFUN_CHAR_LEFT_SELECT:
 510         case LFUN_CHAR_BACKWARD_SELECT:
 511         case LFUN_CHAR_FORWARD_SELECT: {
 512                 // are we in a selection?
 513                 bool select = (cmd.action == LFUN_CHAR_RIGHT_SELECT
 514                                            || cmd.action == LFUN_CHAR_LEFT_SELECT
 515                                            || cmd.action == LFUN_CHAR_BACKWARD_SELECT
 516                                            || cmd.action == LFUN_CHAR_FORWARD_SELECT);
 517                 // are we moving forward or backwards?
 518                 // If the command was RIGHT or LEFT, then whether we're moving forward
 519                 // or backwards depends on the cursor movement mode (logical or visual):
 520                 //  * in visual mode, since math is always LTR, right -> forward,
 521                 //    left -> backwards
 522                 //  * in logical mode, the mapping is determined by the
 523                 //    reverseDirectionNeeded() function
 524
 525                 bool forward;
 526                 kb_action finish_lfun;
 527
 528                 if (cmd.action == LFUN_CHAR_FORWARD
 529                                 || cmd.action == LFUN_CHAR_FORWARD_SELECT) {
 530                         forward = true;
 531                         finish_lfun = LFUN_FINISHED_FORWARD;
 532                 }
 533                 else if (cmd.action == LFUN_CHAR_BACKWARD
 534                                 || cmd.action == LFUN_CHAR_BACKWARD_SELECT) {
 535                         forward = false;
 536                         finish_lfun = LFUN_FINISHED_BACKWARD;
 537                 }
 538                 else {
 539                         bool right = (cmd.action == LFUN_CHAR_RIGHT_SELECT
 540                                                   || cmd.action == LFUN_CHAR_RIGHT);
 541                         if (lyxrc.visual_cursor || !reverseDirectionNeeded(cur))
 542                                 forward = right;
 543                         else
 544                                 forward = !right;
 545
 546                         if (right)
 547                                 finish_lfun = LFUN_FINISHED_RIGHT;
 548                         else
 549                                 finish_lfun = LFUN_FINISHED_LEFT;
 550                 }
 551                 // Now that we know exactly what we want to do, let's do it!
 552                 cur.selHandle(select);
 553                 cur.autocorrect() = false;
 554                 cur.clearTargetX();
 555                 cur.macroModeClose();
 556                 // try moving forward or backwards as necessary...
 557                 if (!(forward ? cursorMathForward(cur) : cursorMathBackward(cur))) {
 558                         // ... and if movement failed, then finish forward or backwards
 559                         // as necessary
 560                         cmd = FuncRequest(finish_lfun);
 561                         cur.undispatched();
 562                 }
 563                 break;
 564         }
 565
 566         case LFUN_DOWN:
 567         case LFUN_UP:
 568                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 569         case LFUN_DOWN_SELECT:
 570         case LFUN_UP_SELECT: {
 571                 // close active macro
 572                 if (cur.inMacroMode()) {
 573                         cur.macroModeClose();
 574                         break;
 575                 }
 576
 577                 // stop/start the selection
 578                 bool select = cmd.action == LFUN_DOWN_SELECT ||
 579                         cmd.action == LFUN_UP_SELECT;
 580                 cur.selHandle(select);
 581
 582                 // go up/down
 583                 bool up = cmd.action == LFUN_UP || cmd.action == LFUN_UP_SELECT;
 584                 bool successful = cur.upDownInMath(up);
 585                 if (successful) {
 586                         // notify left insets and give them chance to set update flags
 587                         lyx::notifyCursorLeaves(cur.beforeDispatchCursor(), cur);
 588                         cur.fixIfBroken();
 589                         break;
 590                 }
 591
 592                 if (cur.fixIfBroken())
 593                         // FIXME: Something bad happened. We pass the corrected Cursor
 594                         // instead of letting things go worse.
 595                         break;
 596
 597                 // We did not manage to move the cursor.
 598                 cur.undispatched();
 599                 break;
 600         }
 601
 602         case LFUN_MOUSE_DOUBLE:
 603         case LFUN_MOUSE_TRIPLE:
 604         case LFUN_WORD_SELECT:
 605                 cur.pos() = 0;
 606                 cur.idx() = 0;
 607                 cur.resetAnchor();
 608                 cur.selection() = true;
 609                 cur.pos() = cur.lastpos();
 610                 cur.idx() = cur.lastidx();
 611                 break;
 612
 613         case LFUN_PARAGRAPH_UP:
 614         case LFUN_PARAGRAPH_DOWN:
 615                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 616         case LFUN_PARAGRAPH_UP_SELECT:
 617         case LFUN_PARAGRAPH_DOWN_SELECT:
 618                 break;
 619
 620         case LFUN_LINE_BEGIN:
 621         case LFUN_WORD_BACKWARD:
 622         case LFUN_WORD_LEFT:
 623                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 624         case LFUN_LINE_BEGIN_SELECT:
 625         case LFUN_WORD_BACKWARD_SELECT:
 626         case LFUN_WORD_LEFT_SELECT:
 627                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 628                                 cmd.action == LFUN_WORD_LEFT_SELECT ||
 629                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 630                 cur.macroModeClose();
 631                 if (cur.pos() != 0) {
 632                         cur.pos() = 0;
 633                 } else if (cur.col() != 0) {
 634                         cur.idx() -= cur.col();
 635                         cur.pos() = 0;
 636                 } else if (cur.idx() != 0) {
 637                         cur.idx() = 0;
 638                         cur.pos() = 0;
 639                 } else {
 640                         cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 641                         cur.undispatched();
 642                 }
 643                 break;
 644
 645         case LFUN_WORD_FORWARD:
 646         case LFUN_WORD_RIGHT:
 647         case LFUN_LINE_END:
 648                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 649         case LFUN_WORD_FORWARD_SELECT:
 650         case LFUN_WORD_RIGHT_SELECT:
 651         case LFUN_LINE_END_SELECT:
 652                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 653                                 cmd.action == LFUN_WORD_RIGHT_SELECT ||
 654                                 cmd.action == LFUN_LINE_END_SELECT);
 655                 cur.macroModeClose();
 656                 cur.clearTargetX();
 657                 if (cur.pos() != cur.lastpos()) {
 658                         cur.pos() = cur.lastpos();
 659                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 660                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 661                         cur.pos() = cur.lastpos();
 662                 } else if (cur.idx() != cur.lastidx()) {
 663                         cur.idx() = cur.lastidx();
 664                         cur.pos() = cur.lastpos();
 665                 } else {
 666                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 667                         cur.undispatched();
 668                 }
 669                 break;
 670
 671         case LFUN_SCREEN_UP_SELECT:
 672                 cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 673                 cur.undispatched();
 674                 break;
 675
 676         case LFUN_SCREEN_DOWN_SELECT:
 677                 cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 678                 cur.undispatched();
 679                 break;
 680
 681         case LFUN_CELL_FORWARD:
 682                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 683                 cur.inset().idxNext(cur);
 684                 break;
 685
 686         case LFUN_CELL_BACKWARD:
 687                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 688                 cur.inset().idxPrev(cur);
 689                 break;
 690
 691         case LFUN_WORD_DELETE_BACKWARD:
 692         case LFUN_CHAR_DELETE_BACKWARD:
 693                 if (cur.pos() == 0)
 694                         // May affect external cell:
 695                         cur.recordUndoInset();
 696                 else
 697                         cur.recordUndo();
 698                 // if the inset can not be removed from within, delete it
 699                 if (!cur.backspace()) {
 700                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 701                         cur.innerText()->dispatch(cur, cmd);
 702                 }
 703                 break;
 704
 705         case LFUN_WORD_DELETE_FORWARD:
 706         case LFUN_CHAR_DELETE_FORWARD:
 707                 if (cur.pos() == cur.lastpos())
 708                         // May affect external cell:
 709                         cur.recordUndoInset();
 710                 else
 711                         cur.recordUndo();
 712                 // if the inset can not be removed from within, delete it
 713                 if (!cur.erase()) {
 714                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 715                         cur.innerText()->dispatch(cur, cmd);
 716                 }
 717                 break;
 718
 719         case LFUN_ESCAPE:
 720                 if (cur.selection())
 721                         cur.clearSelection();
 722                 else  {
 723                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 724                         cur.undispatched();
 725                 }
 726                 break;
 727
 728         // 'Locks' the math inset. A 'locked' math inset behaves as a unit
 729         // that is traversed by a single <CursorLeft>/<CursorRight>.
 730         case LFUN_INSET_TOGGLE:
 731                 cur.recordUndo();
 732                 lock(!lock());
 733                 cur.popForward();
 734                 break;
 735
 736         case LFUN_SELF_INSERT:
 737                 if (cmd.argument().size() != 1) {
 738                         cur.recordUndo();
 739                         docstring const arg = cmd.argument();
 740                         if (!interpretString(cur, arg))
 741                                 cur.insert(arg);
 742                         break;
 743                 }
 744                 // Don't record undo steps if we are in macro mode and
 745                 // cmd.argument is the next character of the macro name.
 746                 // Otherwise we'll get an invalid cursor if we undo after
 747                 // the macro was finished and the macro is a known command,
 748                 // e.g. sqrt. Cursor::macroModeClose replaces in this case
 749                 // the InsetMathUnknown with name "frac" by an empty
 750                 // InsetMathFrac -> a pos value > 0 is invalid.
 751                 // A side effect is that an undo before the macro is finished
 752                 // undoes the complete macro, not only the last character.
 753                 if (!cur.inMacroMode())
 754                         cur.recordUndo();
 755
 756                 // spacial handling of space. If we insert an inset
 757                 // via macro mode, we want to put the cursor inside it
 758                 // if relevant. Think typing "\frac<space>".
 759                 if (cmd.argument()[0] == ' '
 760                     && cur.inMacroMode() && cur.macroName() != "\\"
 761                     && cur.macroModeClose()) {
 762                         MathAtom const atom = cur.prevAtom();
 763                         if (atom->asNestInset() && atom->isActive()) {
 764                                 cur.posBackward();
 765                                 cur.pushBackward(*cur.nextInset());
 766                         }
 767                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 768                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 769                         cur.undispatched();
 770                 }
 771                 break;
 772
 773         //case LFUN_SERVER_GET_XY:
 774         //      sprintf(dispatch_buffer, "%d %d",);
 775         //      break;
 776
 777         case LFUN_SERVER_SET_XY: {
 778                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 779                 int x = 0;
 780                 int y = 0;
 781                 istringstream is(to_utf8(cmd.argument()));
 782                 is >> x >> y;
 783                 cur.setScreenPos(x, y);
 784                 break;
 785         }
 786
 787         // Special casing for superscript in case of LyX handling
 788         // dead-keys:
 789         case LFUN_ACCENT_CIRCUMFLEX:
 790                 if (cmd.argument().empty()) {
 791                         // do superscript if LyX handles
 792                         // deadkeys
 793                         cur.recordUndo();
 794                         script(cur, true, grabAndEraseSelection(cur));
 795                 }
 796                 break;
 797
 798         case LFUN_ACCENT_UMLAUT:
 799         case LFUN_ACCENT_ACUTE:
 800         case LFUN_ACCENT_GRAVE:
 801         case LFUN_ACCENT_BREVE:
 802         case LFUN_ACCENT_DOT:
 803         case LFUN_ACCENT_MACRON:
 804         case LFUN_ACCENT_CARON:
 805         case LFUN_ACCENT_TILDE:
 806         case LFUN_ACCENT_CEDILLA:
 807         case LFUN_ACCENT_CIRCLE:
 808         case LFUN_ACCENT_UNDERDOT:
 809         case LFUN_ACCENT_TIE:
 810         case LFUN_ACCENT_OGONEK:
 811         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 812                 break;
 813
 814         //  Math fonts
 815         case LFUN_FONT_FREE_APPLY:
 816         case LFUN_FONT_FREE_UPDATE:
 817                 handleFont2(cur, cmd.argument());
 818                 break;
 819
 820         case LFUN_FONT_BOLD:
 821                 if (currentMode() == TEXT_MODE)
 822                         handleFont(cur, cmd.argument(), "textbf");
 823                 else
 824                         handleFont(cur, cmd.argument(), "mathbf");
 825                 break;
 826         case LFUN_FONT_SANS:
 827                 if (currentMode() == TEXT_MODE)
 828                         handleFont(cur, cmd.argument(), "textsf");
 829                 else
 830                         handleFont(cur, cmd.argument(), "mathsf");
 831                 break;
 832         case LFUN_FONT_EMPH:
 833                 if (currentMode() == TEXT_MODE)
 834                         handleFont(cur, cmd.argument(), "emph");
 835                 else
 836                         handleFont(cur, cmd.argument(), "mathcal");
 837                 break;
 838         case LFUN_FONT_ROMAN:
 839                 if (currentMode() == TEXT_MODE)
 840                         handleFont(cur, cmd.argument(), "textrm");
 841                 else
 842                         handleFont(cur, cmd.argument(), "mathrm");
 843                 break;
 844         case LFUN_FONT_TYPEWRITER:
 845                 if (currentMode() == TEXT_MODE)
 846                         handleFont(cur, cmd.argument(), "texttt");
 847                 else
 848                         handleFont(cur, cmd.argument(), "mathtt");
 849                 break;
 850         case LFUN_FONT_FRAK:
 851                 handleFont(cur, cmd.argument(), "mathfrak");
 852                 break;
 853         case LFUN_FONT_ITAL:
 854                 if (currentMode() == TEXT_MODE)
 855                         handleFont(cur, cmd.argument(), "textit");
 856                 else
 857                         handleFont(cur, cmd.argument(), "mathit");
 858                 break;
 859         case LFUN_FONT_NOUN:
 860                 if (currentMode() == TEXT_MODE)
 861                         // FIXME: should be "noun"
 862                         handleFont(cur, cmd.argument(), "textsc");
 863                 else
 864                         handleFont(cur, cmd.argument(), "mathbb");
 865                 break;
 866         /*
 867         case LFUN_FONT_FREE_APPLY:
 868                 handleFont(cur, cmd.argument(), "textrm");
 869                 break;
 870         */
 871         case LFUN_FONT_DEFAULT:
 872                 handleFont(cur, cmd.argument(), "textnormal");
 873                 break;
 874
 875         case LFUN_MATH_MODE: {
 876 #if 1
 877                 // ignore math-mode on when already in math mode
 878                 if (currentMode() == Inset::MATH_MODE && cmd.argument() == "on")
 879                         break;
 880                 cur.macroModeClose();
 881                 docstring const save_selection = grabAndEraseSelection(cur);
 882                 selClearOrDel(cur);
 883                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 884                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 885                 cur.posBackward();
 886                 cur.pushBackward(*cur.nextInset());
 887                 cur.niceInsert(save_selection);
 888 #else
 889                 if (currentMode() == Inset::TEXT_MODE) {
 890                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 891                         cur.message(_("create new math text environment ($...$)"));
 892                 } else {
 893                         handleFont(cur, cmd.argument(), "textrm");
 894                         cur.message(_("entered math text mode (textrm)"));
 895                 }
 896 #endif
 897                 break;
 898         }
 899
 900         case LFUN_MATH_SIZE:
 901 #if 0
 902                 cur.recordUndo();
 903                 cur.setSize(arg);
 904 #endif
 905                 break;
 906
 907         case LFUN_MATH_MATRIX: {
 908                 cur.recordUndo();
 909                 unsigned int m = 1;
 910                 unsigned int n = 1;
 911                 docstring v_align;
 912                 docstring h_align;
 913                 idocstringstream is(cmd.argument());
 914                 is >> m >> n >> v_align >> h_align;
 915                 if (m < 1)
 916                         m = 1;
 917                 if (n < 1)
 918                         n = 1;
 919                 v_align += 'c';
 920                 cur.niceInsert(
 921                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 922                 break;
 923         }
 924
 925         case LFUN_MATH_DELIM: {
 926                 docstring ls;
 927                 docstring rs = split(cmd.argument(), ls, ' ');
 928                 // Reasonable default values
 929                 if (ls.empty())
 930                         ls = '(';
 931                 if (rs.empty())
 932                         rs = ')';
 933                 cur.recordUndo();
 934                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 935                 break;
 936         }
 937
 938         case LFUN_MATH_BIGDELIM: {
 939                 docstring const lname  = from_utf8(cmd.getArg(0));
 940                 docstring const ldelim = from_utf8(cmd.getArg(1));
 941                 docstring const rname  = from_utf8(cmd.getArg(2));
 942                 docstring const rdelim = from_utf8(cmd.getArg(3));
 943                 latexkeys const * l = in_word_set(lname);
 944                 bool const have_l = l && l->inset == "big" &&
 945                                     InsetMathBig::isBigInsetDelim(ldelim);
 946                 l = in_word_set(rname);
 947                 bool const have_r = l && l->inset == "big" &&
 948                                     InsetMathBig::isBigInsetDelim(rdelim);
 949                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 950                 // or right delimiter.
 951                 if (have_l || have_r) {
 952                         cur.recordUndo();
 953                         docstring const selection = grabAndEraseSelection(cur);
 954                         selClearOrDel(cur);
 955                         if (have_l)
 956                                 cur.insert(MathAtom(new InsetMathBig(lname,
 957                                                                 ldelim)));
 958                         cur.niceInsert(selection);
 959                         if (have_r)
 960                                 cur.insert(MathAtom(new InsetMathBig(rname,
 961                                                                 rdelim)));
 962                 }
 963                 // Don't call cur.undispatched() if we did nothing, this would
 964                 // lead to infinite recursion via Text::dispatch().
 965                 break;
 966         }
 967
 968         case LFUN_SPACE_INSERT:
 969         case LFUN_MATH_SPACE:
 970                 cur.recordUndo();
 971                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 972                 break;
 973
 974         case LFUN_ERT_INSERT:
 975                 // interpret this as if a backslash was typed
 976                 cur.recordUndo();
 977                 interpretChar(cur, '\\');
 978                 break;
 979
 980         case LFUN_MATH_SUBSCRIPT:
 981                 // interpret this as if a _ was typed
 982                 cur.recordUndo();
 983                 interpretChar(cur, '_');
 984                 break;
 985
 986         case LFUN_MATH_SUPERSCRIPT:
 987                 // interpret this as if a ^ was typed
 988                 cur.recordUndo();
 989                 interpretChar(cur, '^');
 990                 break;
 991
 992         case LFUN_MATH_MACRO_FOLD:
 993         case LFUN_MATH_MACRO_UNFOLD: {
 994                 Cursor it = cur;
 995                 bool fold = cmd.action == LFUN_MATH_MACRO_FOLD;
 996                 bool found = findMacroToFoldUnfold(it, fold);
 997                 if (found) {
 998                         MathMacro * macro = it.nextInset()->asInsetMath()->asMacro();
 999                         cur.recordUndoInset();
1000                         if (fold)
1001                                 macro->fold(cur);
1002                         else
1003                                 macro->unfold(cur);
1004                 }
1005                 break;
1006         }
1007
1008         case LFUN_QUOTE_INSERT:
1009                 // interpret this as if a straight " was typed
1010                 cur.recordUndo();
1011                 interpretChar(cur, '\"');
1012                 break;
1013
1014 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
1015 // handling such that "self-insert" works on "arbitrary stuff" too, and
1016 // math-insert only handles special math things like "matrix".
1017         case LFUN_MATH_INSERT: {
1018                 cur.recordUndo();
1019                 if (cmd.argument() == "^" || cmd.argument() == "_") {
1020                         interpretChar(cur, cmd.argument()[0]);
1021                 } else
1022                         cur.niceInsert(cmd.argument());
1023                 break;
1024                 }
1025
1026         case LFUN_DIALOG_SHOW_NEW_INSET: {
1027                 docstring const & name = cmd.argument();
1028                 string data;
1029                 if (name == "ref") {
1030                         InsetMathRef tmp(name);
1031                         data = tmp.createDialogStr(to_utf8(name));
1032                 }
1033                 cur.bv().showDialog(to_utf8(name), data);
1034                 break;
1035         }
1036
1037         case LFUN_INSET_INSERT: {
1038                 MathData ar;
1039                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
1040                         cur.recordUndo();
1041                         cur.insert(ar);
1042                 } else
1043                         cur.undispatched();
1044                 break;
1045         }
1046         case LFUN_INSET_DISSOLVE:
1047                 if (!asHullInset()) {
1048                         cur.recordUndoInset();
1049                         cur.pullArg();
1050                 }
1051                 break;
1052
1053         default:
1054                 InsetMath::doDispatch(cur, cmd);
1055                 break;
1056         }
1057 }
1058
1059
1060 bool InsetMathNest::findMacroToFoldUnfold(Cursor & it, bool fold) const {
1061         // look for macro to open/close, but stay in mathed
1062         for (; !it.empty(); it.pop_back()) {
1063
1064                 // go backward through the current cell
1065                 Inset * inset = it.nextInset();
1066                 while (inset && inset->asInsetMath()) {
1067                         MathMacro * macro = inset->asInsetMath()->asMacro();
1068                         if (macro) {
1069                                 // found the an macro to open/close?
1070                                 if (macro->folded() != fold)
1071                                         return true;
1072
1073                                 // Wrong folding state.
1074                                 // If this was the first we see in this slice, look further left,
1075                                 // otherwise go up.
1076                                 if (inset != it.nextInset())
1077                                         break;
1078                         }
1079
1080                         // go up if this was the left most position
1081                         if (it.pos() == 0)
1082                                 break;
1083
1084                         // go left
1085                         it.pos()--;
1086                         inset = it.nextInset();
1087                 }
1088         }
1089
1090         return false;
1091 }
1092
1093
1094 bool InsetMathNest::getStatus(Cursor & cur, FuncRequest const & cmd,
1095                 FuncStatus & flag) const
1096 {
1097         // the font related toggles
1098         //string tc = "mathnormal";
1099         bool ret = true;
1100         string const arg = to_utf8(cmd.argument());
1101         switch (cmd.action) {
1102         case LFUN_TABULAR_FEATURE:
1103                 flag.enabled(false);
1104                 break;
1105 #if 0
1106         case LFUN_TABULAR_FEATURE:
1107                 // FIXME: check temporarily disabled
1108                 // valign code
1109                 char align = mathcursor::valign();
1110                 if (align == '\0') {
1111                         enable = false;
1112                         break;
1113                 }
1114                 if (cmd.argument().empty()) {
1115                         flag.clear();
1116                         break;
1117                 }
1118                 if (!contains("tcb", cmd.argument()[0])) {
1119                         enable = false;
1120                         break;
1121                 }
1122                 flag.setOnOff(cmd.argument()[0] == align);
1123                 break;
1124 #endif
1125         /// We have to handle them since 1.4 blocks all unhandled actions
1126         case LFUN_FONT_ITAL:
1127         case LFUN_FONT_BOLD:
1128         case LFUN_FONT_SANS:
1129         case LFUN_FONT_EMPH:
1130         case LFUN_FONT_TYPEWRITER:
1131         case LFUN_FONT_NOUN:
1132         case LFUN_FONT_ROMAN:
1133         case LFUN_FONT_DEFAULT:
1134                 flag.enabled(true);
1135                 break;
1136         case LFUN_MATH_MUTATE:
1137                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1138                 flag.setOnOff(false);
1139                 break;
1140
1141         // we just need to be in math mode to enable that
1142         case LFUN_MATH_SIZE:
1143         case LFUN_MATH_SPACE:
1144         case LFUN_MATH_LIMITS:
1145         case LFUN_MATH_EXTERN:
1146                 flag.enabled(true);
1147                 break;
1148
1149         case LFUN_FONT_FRAK:
1150                 flag.enabled(currentMode() != TEXT_MODE);
1151                 break;
1152
1153         case LFUN_MATH_INSERT: {
1154                 bool const textarg =
1155                         arg == "\\textbf"   || arg == "\\textsf" ||
1156                         arg == "\\textrm"   || arg == "\\textmd" ||
1157                         arg == "\\textit"   || arg == "\\textsc" ||
1158                         arg == "\\textsl"   || arg == "\\textup" ||
1159                         arg == "\\texttt"   || arg == "\\textbb" ||
1160                         arg == "\\textnormal";
1161                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1162                 break;
1163         }
1164
1165         case LFUN_MATH_MATRIX:
1166                 flag.enabled(currentMode() == MATH_MODE);
1167                 break;
1168
1169         case LFUN_INSET_INSERT: {
1170                 // Don't test createMathInset_fromDialogStr(), since
1171                 // getStatus is not called with a valid reference and the
1172                 // dialog would not be applyable.
1173                 string const name = cmd.getArg(0);
1174                 flag.enabled(name == "ref");
1175                 break;
1176         }
1177
1178         case LFUN_MATH_DELIM:
1179         case LFUN_MATH_BIGDELIM:
1180                 // Don't do this with multi-cell selections
1181                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1182                 break;
1183
1184         case LFUN_MATH_MACRO_FOLD:
1185         case LFUN_MATH_MACRO_UNFOLD: {
1186                 Cursor it = cur;
1187                 bool found = findMacroToFoldUnfold(it, cmd.action == LFUN_MATH_MACRO_FOLD);
1188                 flag.enabled(found);
1189                 break;
1190         }
1191
1192         case LFUN_SPECIALCHAR_INSERT:
1193                 // FIXME: These would probably make sense in math-text mode
1194                 flag.enabled(false);
1195                 break;
1196
1197         case LFUN_INSET_DISSOLVE:
1198                 flag.enabled(!asHullInset());
1199                 break;
1200
1201         default:
1202                 ret = false;
1203                 break;
1204         }
1205         return ret;
1206 }
1207
1208
1209 void InsetMathNest::edit(Cursor & cur, bool front, EntryDirection entry_from)
1210 {
1211         cur.push(*this);
1212         bool enter_front = (entry_from == Inset::ENTRY_DIRECTION_RIGHT ||
1213                 (entry_from == Inset::ENTRY_DIRECTION_IGNORE && front));
1214         cur.idx() = enter_front ? 0 : cur.lastidx();
1215         cur.pos() = enter_front ? 0 : cur.lastpos();
1216         cur.resetAnchor();
1217         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1218 }
1219
1220
1221 Inset * InsetMathNest::editXY(Cursor & cur, int x, int y)
1222 {
1223         int idx_min = 0;
1224         int dist_min = 1000000;
1225         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1226                 int const d = cell(i).dist(cur.bv(), x, y);
1227                 if (d < dist_min) {
1228                         dist_min = d;
1229                         idx_min = i;
1230                 }
1231         }
1232         MathData & ar = cell(idx_min);
1233         cur.push(*this);
1234         cur.idx() = idx_min;
1235         cur.pos() = ar.x2pos(&cur.bv(), x - ar.xo(cur.bv()));
1236
1237         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1238         if (dist_min == 0) {
1239                 // hit inside cell
1240                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1241                         if (ar[i]->covers(cur.bv(), x, y))
1242                                 return ar[i].nucleus()->editXY(cur, x, y);
1243         }
1244         return this;
1245 }
1246
1247
1248 void InsetMathNest::lfunMousePress(Cursor & cur, FuncRequest & cmd)
1249 {
1250         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1251         BufferView & bv = cur.bv();
1252         bool do_selection = cmd.button() == mouse_button::button1
1253                 && cmd.argument() == "region-select";
1254         bv.mouseSetCursor(cur, do_selection);
1255         if (cmd.button() == mouse_button::button1) {
1256                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1257                 // Update the cursor update flags as needed:
1258                 //
1259                 // Update::Decoration: tells to update the decoration
1260                 //                     (visual box corners that define
1261                 //                     the inset)/
1262                 // Update::FitCursor: adjust the screen to the cursor
1263                 //                    position if needed
1264                 // cur.result().update(): don't overwrite previously set flags.
1265                 cur.updateFlags(Update::Decoration | Update::FitCursor
1266                                 | cur.result().update());
1267         } else if (cmd.button() == mouse_button::button2) {
1268                 if (cap::selection()) {
1269                         // See comment in Text::dispatch why we do this
1270                         cap::copySelectionToStack();
1271                         cmd = FuncRequest(LFUN_PASTE, "0");
1272                         doDispatch(bv.cursor(), cmd);
1273                 } else {
1274                         MathData ar;
1275                         asArray(theSelection().get(), ar);
1276                         bv.cursor().insert(ar);
1277                 }
1278         }
1279 }
1280
1281
1282 void InsetMathNest::lfunMouseMotion(Cursor & cur, FuncRequest & cmd)
1283 {
1284         // only select with button 1
1285         if (cmd.button() == mouse_button::button1) {
1286                 Cursor & bvcur = cur.bv().cursor();
1287                 if (bvcur.anchor_.hasPart(cur)) {
1288                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1289                         bvcur.setCursor(cur);
1290                         bvcur.selection() = true;
1291                         //lyxerr << "MOTION " << bvcur << endl;
1292                 } else
1293                         cur.undispatched();
1294         }
1295 }
1296
1297
1298 void InsetMathNest::lfunMouseRelease(Cursor & cur, FuncRequest & cmd)
1299 {
1300         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1301
1302         if (cmd.button() == mouse_button::button1) {
1303                 if (!cur.selection())
1304                         cur.noUpdate();
1305                 else {
1306                         Cursor & bvcur = cur.bv().cursor();
1307                         bvcur.selection() = true;
1308                 }
1309                 return;
1310         }
1311
1312         cur.undispatched();
1313 }
1314
1315
1316 bool InsetMathNest::interpretChar(Cursor & cur, char_type c)
1317 {
1318         //lyxerr << "interpret 2: '" << c << "'" << endl;
1319         docstring save_selection;
1320         if (c == '^' || c == '_')
1321                 save_selection = grabAndEraseSelection(cur);
1322
1323         cur.clearTargetX();
1324
1325         // handle macroMode
1326         if (cur.inMacroMode()) {
1327                 docstring name = cur.macroName();
1328
1329                 /// are we currently typing '#1' or '#2' or...?
1330                 if (name == "\\#") {
1331                         cur.backspace();
1332                         int n = c - '0';
1333                         if (n >= 1 && n <= 9)
1334                                 cur.insert(new MathMacroArgument(n));
1335                         return true;
1336                 }
1337
1338                 if (isAlphaASCII(c)) {
1339                         cur.activeMacro()->setName(name + docstring(1, c));
1340                         return true;
1341                 }
1342
1343                 // handle 'special char' macros
1344                 if (name == "\\") {
1345                         // remove the '\\'
1346                         if (c == '\\') {
1347                                 cur.backspace();
1348                                 if (currentMode() == InsetMath::TEXT_MODE)
1349                                         cur.niceInsert(createInsetMath("textbackslash"));
1350                                 else
1351                                         cur.niceInsert(createInsetMath("backslash"));
1352                         } else if (c == '{') {
1353                                 cur.backspace();
1354                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1355                         } else if (c == '%') {
1356                                 cur.backspace();
1357                                 cur.niceInsert(MathAtom(new InsetMathComment));
1358                         } else if (c == '#') {
1359                                 BOOST_ASSERT(cur.activeMacro());
1360                                 cur.activeMacro()->setName(name + docstring(1, c));
1361                         } else {
1362                                 cur.backspace();
1363                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1364                         }
1365                         return true;
1366                 }
1367
1368                 // One character big delimiters. The others are handled in
1369                 // interpretString().
1370                 latexkeys const * l = in_word_set(name.substr(1));
1371                 if (name[0] == '\\' && l && l->inset == "big") {
1372                         docstring delim;
1373                         switch (c) {
1374                         case '{':
1375                                 delim = from_ascii("\\{");
1376                                 break;
1377                         case '}':
1378                                 delim = from_ascii("\\}");
1379                                 break;
1380                         default:
1381                                 delim = docstring(1, c);
1382                                 break;
1383                         }
1384                         if (InsetMathBig::isBigInsetDelim(delim)) {
1385                                 // name + delim ared a valid InsetMathBig.
1386                                 // We can't use cur.macroModeClose() because
1387                                 // it does not handle delim.
1388                                 InsetMathUnknown * p = cur.activeMacro();
1389                                 p->finalize();
1390                                 --cur.pos();
1391                                 cur.cell().erase(cur.pos());
1392                                 cur.plainInsert(MathAtom(
1393                                         new InsetMathBig(name.substr(1), delim)));
1394                                 return true;
1395                         }
1396                 }
1397
1398                 // leave macro mode and try again if necessary
1399                 cur.macroModeClose();
1400                 if (c == '{')
1401                         cur.niceInsert(MathAtom(new InsetMathBrace));
1402                 else if (c != ' ')
1403                         interpretChar(cur, c);
1404                 return true;
1405         }
1406
1407         // This is annoying as one has to press <space> far too often.
1408         // Disable it.
1409
1410 #if 0
1411                 // leave autocorrect mode if necessary
1412                 if (autocorrect() && c == ' ') {
1413                         autocorrect() = false;
1414                         return true;
1415                 }
1416 #endif
1417
1418         // just clear selection on pressing the space bar
1419         if (cur.selection() && c == ' ') {
1420                 cur.selection() = false;
1421                 return true;
1422         }
1423
1424         selClearOrDel(cur);
1425
1426         if (c == '\\') {
1427                 //lyxerr << "starting with macro" << endl;
1428                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1429                 return true;
1430         }
1431
1432         if (c == '\n') {
1433                 if (currentMode() == InsetMath::TEXT_MODE)
1434                         cur.insert(c);
1435                 return true;
1436         }
1437
1438         if (c == ' ') {
1439                 if (currentMode() == InsetMath::TEXT_MODE) {
1440                         // insert spaces in text mode,
1441                         // but suppress direct insertion of two spaces in a row
1442                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1443                         // it is better than nothing...
1444                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ') {
1445                                 cur.insert(c);
1446                                 // FIXME: we have to enable full redraw here because of the
1447                                 // visual box corners that define the inset. If we know for
1448                                 // sure that we stay within the same cell we can optimize for
1449                                 // that using:
1450                                 //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1451                         }
1452                         return true;
1453                 }
1454                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1455                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1456                         // FIXME: we have to enable full redraw here because of the
1457                         // visual box corners that define the inset. If we know for
1458                         // sure that we stay within the same cell we can optimize for
1459                         // that using:
1460                         //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1461                         return true;
1462                 }
1463
1464                 if (cur.popForward()) {
1465                         // FIXME: we have to enable full redraw here because of the
1466                         // visual box corners that define the inset. If we know for
1467                         // sure that we stay within the same cell we can optimize for
1468                         // that using:
1469                         //cur.updateFlags(Update::FitCursor);
1470                         return true;
1471                 }
1472
1473                 // if we are at the very end, leave the formula
1474                 return cur.pos() != cur.lastpos();
1475         }
1476
1477         // These shouldn't work in text mode:
1478         if (currentMode() != InsetMath::TEXT_MODE) {
1479                 if (c == '_') {
1480                         script(cur, false, save_selection);
1481                         return true;
1482                 }
1483                 if (c == '^') {
1484                         script(cur, true, save_selection);
1485                         return true;
1486                 }
1487                 if (c == '~') {
1488                         cur.niceInsert(createInsetMath("sim"));
1489                         return true;
1490                 }
1491         }
1492
1493         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1494             c == '%' || c == '_' || c == '^') {
1495                 cur.niceInsert(createInsetMath(docstring(1, c)));
1496                 return true;
1497         }
1498
1499
1500         // try auto-correction
1501         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1502         //      return true;
1503
1504         // no special circumstances, so insert the character without any fuss
1505         cur.insert(c);
1506         cur.autocorrect() = true;
1507         return true;
1508 }
1509
1510
1511 bool InsetMathNest::interpretString(Cursor & cur, docstring const & str)
1512 {
1513         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1514         // possible
1515         if (!cur.empty() && cur.pos() > 0 &&
1516             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1517                 if (InsetMathBig::isBigInsetDelim(str)) {
1518                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1519                         if (prev[0] == '\\') {
1520                                 prev = prev.substr(1);
1521                                 latexkeys const * l = in_word_set(prev);
1522                                 if (l && l->inset == "big") {
1523                                         cur.cell()[cur.pos() - 1] =
1524                                                 MathAtom(new InsetMathBig(prev, str));
1525                                         return true;
1526                                 }
1527                         }
1528                 }
1529         }
1530         return false;
1531 }
1532
1533
1534 bool InsetMathNest::script(Cursor & cur, bool up,
1535                 docstring const & save_selection)
1536 {
1537         // Hack to get \^ and \_ working
1538         //lyxerr << "handling script: up: " << up << endl;
1539         if (cur.inMacroMode() && cur.macroName() == "\\") {
1540                 if (up)
1541                         cur.niceInsert(createInsetMath("mathcircumflex"));
1542                 else
1543                         interpretChar(cur, '_');
1544                 return true;
1545         }
1546
1547         cur.macroModeClose();
1548         if (asScriptInset() && cur.idx() == 0) {
1549                 // we are in a nucleus of a script inset, move to _our_ script
1550                 InsetMathScript * inset = asScriptInset();
1551                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1552                 inset->ensure(up);
1553                 cur.idx() = inset->idxOfScript(up);
1554                 cur.pos() = 0;
1555         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1556                 --cur.pos();
1557                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1558                 cur.push(*inset);
1559                 inset->ensure(up);
1560                 cur.idx() = inset->idxOfScript(up);
1561                 cur.pos() = cur.lastpos();
1562         } else {
1563                 // convert the thing to our left to a scriptinset or create a new
1564                 // one if in the very first position of the array
1565                 if (cur.pos() == 0) {
1566                         //lyxerr << "new scriptinset" << endl;
1567                         cur.insert(new InsetMathScript(up));
1568                 } else {
1569                         //lyxerr << "converting prev atom " << endl;
1570                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1571                 }
1572                 --cur.pos();
1573                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1574                 // See comment in MathParser.cpp for special handling of {}-bases
1575
1576                 cur.push(*inset);
1577                 cur.idx() = 1;
1578                 cur.pos() = 0;
1579         }
1580         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1581         cur.niceInsert(save_selection);
1582         cur.resetAnchor();
1583         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1584         return true;
1585 }
1586
1587
1588 bool InsetMathNest::cursorMathForward(Cursor & cur)
1589 {
1590         if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
1591                 cur.pushBackward(*cur.nextAtom().nucleus());
1592                 cur.inset().idxFirst(cur);
1593                 return true;
1594         }
1595         if (cur.posForward() || idxForward(cur) || cur.selection())
1596                 return true;
1597         // try to pop forwards --- but don't pop out of math! leave that to
1598         // the FINISH lfuns
1599         int s = cur.depth() - 2;
1600         if (s >= 0 && cur[s].inset().asInsetMath())
1601                 return cur.popForward();
1602         return false;
1603 }
1604
1605
1606 bool InsetMathNest::cursorMathBackward(Cursor & cur)
1607 {
1608         if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
1609                 cur.posBackward();
1610                 cur.push(*cur.nextAtom().nucleus());
1611                 cur.inset().idxLast(cur);
1612                 return true;
1613         }
1614         if (cur.posBackward() || idxBackward(cur) || cur.selection())
1615                 return true;
1616         // try to pop backwards --- but don't pop out of math! leave that to
1617         // the FINISH lfuns
1618         int s = cur.depth() - 2;
1619         if (s >= 0 && cur[s].inset().asInsetMath())
1620                 return cur.popBackward();
1621         return false;
1622 }
1623
1624
1625 } // namespace lyx