]> git.lyx.org Git - lyx.git/blobdiff - src/mathed/math_nestinset.C
Get raising/lowering into super/subscripts of selection working (1.3
[lyx.git] / src / mathed / math_nestinset.C
index 3306b0638487ceadef47682a0dcc03c330ab4a0b..3d54c3f35b9f77f7021e34e2b1b8647cd9959bc8 100644 (file)
@@ -13,7 +13,9 @@
 #include "math_nestinset.h"
 
 #include "math_arrayinset.h"
+#include "math_boxinset.h"
 #include "math_braceinset.h"
+#include "math_colorinset.h"
 #include "math_commentinset.h"
 #include "math_data.h"
 #include "math_deliminset.h"
 #include "math_hullinset.h"
 #include "math_mathmlstream.h"
 #include "math_macroarg.h"
-#include "math_mboxinset.h"
+//#include "math_mboxinset.h"
 #include "math_parser.h"
 #include "math_scriptinset.h"
 #include "math_spaceinset.h"
 #include "math_symbolinset.h"
 #include "math_support.h"
 #include "math_unknowninset.h"
+#include "ref_inset.h"
 
 #include "BufferView.h"
 #include "CutAndPaste.h"
 #include "FuncStatus.h"
 #include "LColor.h"
 #include "bufferview_funcs.h"
+#include "coordcache.h"
 #include "cursor.h"
 #include "debug.h"
 #include "dispatchresult.h"
 #include "frontends/Dialogs.h"
 #include "frontends/LyXView.h"
 #include "frontends/Painter.h"
+#include "frontends/nullpainter.h"
 
 #include <sstream>
 
 using lyx::cap::copySelection;
 using lyx::cap::grabAndEraseSelection;
 using lyx::cap::cutSelection;
-using lyx::cap::pasteSelection;
 using lyx::cap::replaceSelection;
 using lyx::cap::selClearOrDel;
 
@@ -62,18 +66,6 @@ using std::string;
 using std::istringstream;
 
 
-
-namespace {
-
-// local global
-int first_x;
-int first_y;
-
-} // namespace anon
-
-
-
-
 MathNestInset::MathNestInset(idx_type nargs)
        : cells_(nargs), lock_(false)
 {}
@@ -97,14 +89,44 @@ MathArray const & MathNestInset::cell(idx_type i) const
 }
 
 
-void MathNestInset::getCursorPos(LCursor const & cur, int & x, int & y) const
+void MathNestInset::cursorPos(CursorSlice const & sl, bool /*boundary*/,
+       int & x, int & y) const
 {
-       BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
-       MathArray const & ar = cur.cell();
-       x = ar.xo() + ar.pos2x(cur.pos());
-       y = ar.yo() + cur.bv().top_y();
+// FIXME: This is a hack. Ideally, the coord cache should not store
+// absolute positions, but relative ones. This would mean to call
+// setXY() not in MathArray::draw(), but in the parent insets' draw()
+// with the correctly adjusted x,y values. But this means that we'd have
+// to touch all (math)inset's draw() methods. Right now, we'll store
+// absolute value, and make them here relative, only to make them
+// absolute again when actually drawing the cursor. What a mess.
+       BOOST_ASSERT(ptr_cmp(&sl.inset(), this));
+       MathArray const & ar = sl.cell();
+       if (!theCoords.getArrays().has(&ar)) {
+               // this can (semi-)legally happen if we just created this cell
+               // and it never has been drawn before. So don't ASSERT.
+               //lyxerr << "no cached data for array " << &ar << endl;
+               x = 0;
+               y = 0;
+               return;
+       }
+       Point const pt = theCoords.getArrays().xy(&ar);
+       if (!theCoords.getInsets().has(this)) {
+               // same as above
+               //lyxerr << "no cached data for inset " << this << endl;
+               x = 0;
+               y = 0;
+               return;
+       }
+       Point const pt2 = theCoords.getInsets().xy(this);
+       //lyxerr << "retrieving position cache for MathArray "
+       //      << pt.x_ << ' ' << pt.y_ << std::endl;
+       x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
+       y = pt.y_ - pt2.y_;
+//     lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
+//             << " asc: " << ascent() << "  des: " << descent()
+//             << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
        // move cursor visually into empty cells ("blue rectangles");
-       if (cur.cell().empty())
+       if (ar.empty())
                x += 2;
 }
 
@@ -112,7 +134,7 @@ void MathNestInset::getCursorPos(LCursor const & cur, int & x, int & y) const
 void MathNestInset::metrics(MetricsInfo const & mi) const
 {
        MetricsInfo m = mi;
-       for (idx_type i = 0; i < nargs(); ++i)
+       for (idx_type i = 0, n = nargs(); i != n; ++i)
                cell(i).metrics(m);
 }
 
@@ -179,7 +201,7 @@ void MathNestInset::dump() const
        os << "---------------------------------------------\n";
        write(os);
        os << "\n";
-       for (idx_type i = 0; i < nargs(); ++i)
+       for (idx_type i = 0, n = nargs(); i != n; ++i)
                os << cell(i) << "\n";
        os << "---------------------------------------------\n";
 }
@@ -196,7 +218,7 @@ void MathNestInset::draw(PainterInfo & pi, int x, int y) const
 }
 
 
-void MathNestInset::drawSelection(PainterInfo & pi, int, int) const
+void MathNestInset::drawSelection(PainterInfo & pi, int x, int y) const
 {
        // this should use the x/y values given, not the cached values
        LCursor & cur = pi.base.bv->cursor();
@@ -204,6 +226,13 @@ void MathNestInset::drawSelection(PainterInfo & pi, int, int) const
                return;
        if (!ptr_cmp(&cur.inset(), this))
                return;
+
+       // FIXME: hack to get position cache warm
+       static NullPainter nop;
+       PainterInfo pinop(pi);
+       pinop.pain = nop;
+       draw(pinop, x, y);
+
        CursorSlice s1 = cur.selBegin();
        CursorSlice s2 = cur.selEnd();
        //lyxerr << "MathNestInset::drawing selection: "
@@ -315,7 +344,7 @@ int MathNestInset::latex(Buffer const &, std::ostream & os,
 }
 
 
-void MathNestInset::notifyCursorLeaves(LCursor & /*cur*/)
+void MathNestInset::notifyCursorLeaves(LCursor & cur)
 {
 #ifdef WITH_WARNINGS
 #warning look here
@@ -370,14 +399,13 @@ void MathNestInset::handleFont2(LCursor & cur, string const & arg)
        bool b;
        bv_funcs::string2font(arg, font, b);
        if (font.color() != LColor::inherit) {
-               MathAtom at = createMathInset("color");
-               asArray(lcolor.getGUIName(font.color()), at.nucleus()->cell(0));
-               cur.handleNest(at, 1);
+               MathAtom at = MathAtom(new MathColorInset(true, font.color()));
+               cur.handleNest(at, 0);
        }
 }
 
 
-void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
+void MathNestInset::doDispatch(LCursor & cur, FuncRequest & cmd)
 {
        //lyxerr << "MathNestInset: request: " << cmd << std::endl;
        //CursorSlice sl = cur.current();
@@ -389,9 +417,10 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
                cur.message(_("Paste"));
                replaceSelection(cur);
                size_t n = 0;
-               istringstream is(cmd.argument.c_str());
+               istringstream is(cmd.argument);
                is >> n;
-               pasteSelection(cur, n);
+               string const selection = lyx::cap::getSelection(cur.buffer(), n);
+               cur.niceInsert(selection);
                cur.clearSelection(); // bug 393
                cur.bv().switchKeyMap();
                finishUndo();
@@ -399,8 +428,12 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
        }
 
        case LFUN_CUT:
+               recordUndo(cur);
                cutSelection(cur, true, true);
                cur.message(_("Cut"));
+               // Prevent stale position >= size crash
+               // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
+               cur.normalize();
                break;
 
        case LFUN_COPY:
@@ -434,6 +467,7 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
                break;
 
        case LFUN_FINISHED_DOWN:
+               ++cur.pos();
                cur.bv().cursor() = cur;
                break;
 
@@ -449,8 +483,10 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
                } else if (cur.posRight() || idxRight(cur)
                        || cur.popRight() || cur.selection())
                        ;
-               else
+               else {
                        cmd = FuncRequest(LFUN_FINISHED_RIGHT);
+                       cur.undispatched();
+               }
                break;
 
        case LFUN_LEFTSEL:
@@ -466,22 +502,42 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
                } else if (cur.posLeft() || idxLeft(cur)
                        || cur.popLeft() || cur.selection())
                        ;
-               else
+               else {
                        cmd = FuncRequest(LFUN_FINISHED_LEFT);
+                       cur.undispatched();
+               }
                break;
 
        case LFUN_UPSEL:
        case LFUN_UP:
+               // FIXME Tried to use clearTargetX and macroModeClose, crashed on cur.up()
+               if (cur.inMacroMode()) {
+                       // Make Helge happy
+                       cur.macroModeClose();
+                       break;
+               }
                cur.selHandle(cmd.action == LFUN_UPSEL);
-               if (!cur.up())
+               if (!cur.up()) {
                        cmd = FuncRequest(LFUN_FINISHED_UP);
+                       cur.undispatched();
+               }
+               // fixes bug 1598. Please check!
+               cur.normalize();
                break;
 
        case LFUN_DOWNSEL:
        case LFUN_DOWN:
+               if (cur.inMacroMode()) {
+                       cur.macroModeClose();
+                       break;
+               }
                cur.selHandle(cmd.action == LFUN_DOWNSEL);
-               if (!cur.down())
+               if (!cur.down()) {
                        cmd = FuncRequest(LFUN_FINISHED_DOWN);
+                       cur.undispatched();
+               }
+               // fixes bug 1598. Please check!
+               cur.normalize();
                break;
 
        case LFUN_MOUSE_DOUBLE:
@@ -517,6 +573,7 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
                        cur.pos() = 0;
                } else {
                        cmd = FuncRequest(LFUN_FINISHED_LEFT);
+                       cur.undispatched();
                }
                break;
 
@@ -529,7 +586,7 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
                cur.clearTargetX();
                if (cur.pos() != cur.lastpos()) {
                        cur.pos() = cur.lastpos();
-               } else if (cur.col() != cur.lastcol()) {
+               } else if (ncols() && (cur.col() != cur.lastcol())) {
                        cur.idx() = cur.idx() - cur.col() + cur.lastcol();
                        cur.pos() = cur.lastpos();
                } else if (cur.idx() != cur.lastidx()) {
@@ -537,17 +594,20 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
                        cur.pos() = cur.lastpos();
                } else {
                        cmd = FuncRequest(LFUN_FINISHED_RIGHT);
+                       cur.undispatched();
                }
                break;
 
        case LFUN_PRIORSEL:
        case LFUN_PRIOR:
                cmd = FuncRequest(LFUN_FINISHED_LEFT);
+               cur.undispatched();
                break;
 
        case LFUN_NEXTSEL:
        case LFUN_NEXT:
                cmd = FuncRequest(LFUN_FINISHED_RIGHT);
+               cur.undispatched();
                break;
 
        case LFUN_CELL_FORWARD:
@@ -560,7 +620,11 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
 
        case LFUN_DELETE_WORD_BACKWARD:
        case LFUN_BACKSPACE:
-               recordUndo(cur, Undo::ATOMIC);
+               if (cur.pos() == 0)
+                       // delete whole cell
+                       recordUndoInset(cur, Undo::ATOMIC);
+               else
+                       recordUndo(cur, Undo::ATOMIC);
                cur.backspace();
                break;
 
@@ -568,14 +632,15 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
        case LFUN_DELETE:
                recordUndo(cur);
                cur.erase();
-               cmd = FuncRequest(LFUN_FINISHED_LEFT);
                break;
 
        case LFUN_ESCAPE:
                if (cur.selection())
                        cur.clearSelection();
-               else
-                       cmd = FuncRequest(LFUN_FINISHED_LEFT);
+               else  {
+                       cmd = FuncRequest(LFUN_FINISHED_RIGHT);
+                       cur.undispatched();
+               }
                break;
 
        case LFUN_INSET_TOGGLE:
@@ -592,13 +657,38 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
                break;
 
        case LFUN_SELFINSERT:
-               recordUndo(cur);
                if (cmd.argument.size() != 1) {
+                       recordUndo(cur);
                        cur.insert(cmd.argument);
                        break;
                }
-               if (!interpret(cur, cmd.argument[0]))
+               // Don't record undo steps if we are in macro mode and
+               // cmd.argument is the next character of the macro name.
+               // Otherwise we'll get an invalid cursor if we undo after
+               // the macro was finished and the macro is a known command,
+               // e.g. sqrt. LCursor::macroModeClose replaces in this case
+               // the MathUnknownInset with name "frac" by an empty
+               // MathFracInset -> a pos value > 0 is invalid.
+               // A side effect is that an undo before the macro is finished
+               // undoes the complete macro, not only the last character.
+               if (!cur.inMacroMode())
+                       recordUndo(cur);
+
+               // spacial handling of space. If we insert an inset
+               // via macro mode, we want to put the cursor inside it
+               // if relevant. Think typing "\frac<space>".
+               if (cmd.argument[0] == ' ' 
+                   && cur.inMacroMode() && cur.macroName() != "\\"
+                   && cur.macroModeClose()) {
+                       MathAtom const atom = cur.prevAtom();
+                       if (atom->asNestInset() && atom->nargs() > 0) {
+                               cur.posLeft();
+                               cur.pushLeft(*cur.nextInset());
+                       }
+               } else if (!interpret(cur, cmd.argument[0])) {
                        cmd = FuncRequest(LFUN_FINISHED_RIGHT);
+                       cur.undispatched();
+               }
                break;
 
        //case LFUN_GETXY:
@@ -609,7 +699,7 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
                lyxerr << "LFUN_SETXY broken!" << endl;
                int x = 0;
                int y = 0;
-               istringstream is(cmd.argument.c_str());
+               istringstream is(cmd.argument);
                is >> x >> y;
                cur.setScreenPos(x, y);
                break;
@@ -622,6 +712,7 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
                        // do superscript if LyX handles
                        // deadkeys
                        recordUndo(cur, Undo::ATOMIC);
+                       safe_ = grabAndEraseSelection(cur);
                        script(cur, true);
                }
                break;
@@ -649,28 +740,50 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
                break;
 
        case LFUN_BOLD:
-               handleFont(cur, cmd.argument, "mathbf");
+               if (currentMode() == TEXT_MODE)
+                       handleFont(cur, cmd.argument, "textbf");
+               else
+                       handleFont(cur, cmd.argument, "mathbf");
                break;
        case LFUN_SANS:
-               handleFont(cur, cmd.argument, "mathsf");
+               if (currentMode() == TEXT_MODE)
+                       handleFont(cur, cmd.argument, "textsf");
+               else
+                       handleFont(cur, cmd.argument, "mathsf");
                break;
        case LFUN_EMPH:
-               handleFont(cur, cmd.argument, "mathcal");
+               if (currentMode() == TEXT_MODE)
+                       handleFont(cur, cmd.argument, "emph");
+               else
+                       handleFont(cur, cmd.argument, "mathcal");
                break;
        case LFUN_ROMAN:
-               handleFont(cur, cmd.argument, "mathrm");
+               if (currentMode() == TEXT_MODE)
+                       handleFont(cur, cmd.argument, "textrm");
+               else
+                       handleFont(cur, cmd.argument, "mathrm");
                break;
        case LFUN_CODE:
-               handleFont(cur, cmd.argument, "texttt");
+               if (currentMode() == TEXT_MODE)
+                       handleFont(cur, cmd.argument, "texttt");
+               else
+                       handleFont(cur, cmd.argument, "mathtt");
                break;
        case LFUN_FRAK:
                handleFont(cur, cmd.argument, "mathfrak");
                break;
        case LFUN_ITAL:
-               handleFont(cur, cmd.argument, "mathit");
+               if (currentMode() == TEXT_MODE)
+                       handleFont(cur, cmd.argument, "textit");
+               else
+                       handleFont(cur, cmd.argument, "mathit");
                break;
        case LFUN_NOUN:
-               handleFont(cur, cmd.argument, "mathbb");
+               if (currentMode() == TEXT_MODE)
+                       // FIXME: should be "noun"
+                       handleFont(cur, cmd.argument, "textsc");
+               else
+                       handleFont(cur, cmd.argument, "mathbb");
                break;
        //case LFUN_FREEFONT_APPLY:
                handleFont(cur, cmd.argument, "textrm");
@@ -681,9 +794,13 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
 
        case LFUN_MATH_MODE:
 #if 1
+               // ignore math-mode on when already in math mode
+               if (currentMode() == InsetBase::MATH_MODE && cmd.argument == "on")
+                       break;
                cur.macroModeClose();
                selClearOrDel(cur);
-               cur.plainInsert(MathAtom(new MathMBoxInset(cur.bv())));
+               //cur.plainInsert(MathAtom(new MathMBoxInset(cur.bv())));
+               cur.plainInsert(MathAtom(new MathBoxInset("mbox")));
                cur.posLeft();
                cur.pushLeft(*cur.nextInset());
 #else
@@ -732,7 +849,9 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
                if (rs.empty())
                        rs = ')';
                recordUndo(cur, Undo::ATOMIC);
-               cur.handleNest(MathAtom(new MathDelimInset(ls, rs)));
+               // Don't do this with multi-cell selections
+               if (cur.selBegin().idx() == cur.selEnd().idx())
+                       cur.handleNest(MathAtom(new MathDelimInset(ls, rs)));
                break;
        }
 
@@ -748,47 +867,43 @@ void MathNestInset::priv_dispatch(LCursor & cur, FuncRequest & cmd)
                interpret(cur, '\\');
                break;
 
+       case LFUN_SUBSCRIPT:
+               // interpret this as if a _ was typed
+               recordUndo(cur, Undo::ATOMIC);
+               interpret(cur, '_');
+               break;
+
+       case LFUN_SUPERSCRIPT:
+               // interpret this as if a ^ was typed
+               recordUndo(cur, Undo::ATOMIC);
+               interpret(cur, '^');
+               break;
+
 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 // handling such that "self-insert" works on "arbitrary stuff" too, and
 // math-insert only handles special math things like "matrix".
-       case LFUN_INSERT_MATH:
+       case LFUN_INSERT_MATH: {
                recordUndo(cur, Undo::ATOMIC);
-               cur.niceInsert(cmd.argument);
+               if (cmd.argument == "^" || cmd.argument == "_") {
+                       interpret(cur, cmd.argument[0]);
+               } else
+                       cur.niceInsert(cmd.argument);
                break;
+               }
 
        case LFUN_DIALOG_SHOW_NEW_INSET: {
                string const & name = cmd.argument;
                string data;
-#if 0
                if (name == "ref") {
                        RefInset tmp(name);
                        data = tmp.createDialogStr(name);
                }
-#endif
                cur.bv().owner()->getDialogs().show(name, data, 0);
                break;
        }
 
-       case LFUN_INSET_APPLY: {
-               string const name = cmd.getArg(0);
-               InsetBase * base = cur.bv().owner()->getDialogs().getOpenInset(name);
-
-               if (base) {
-                       FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument);
-                       base->dispatch(cur, fr);
-                       break;
-               }
-               MathArray ar;
-               if (createMathInset_fromDialogStr(cmd.argument, ar)) {
-                       cur.insert(ar);
-                       break;
-               }
-               cur.undispatched();
-               break;
-       }
-
        default:
-               MathDimInset::priv_dispatch(cur, cmd);
+               MathDimInset::doDispatch(cur, cmd);
                break;
        }
 }
@@ -800,7 +915,11 @@ bool MathNestInset::getStatus(LCursor & /*cur*/, FuncRequest const & cmd,
        // the font related toggles
        //string tc = "mathnormal";
        bool ret = true;
+       string const arg = cmd.argument;
        switch (cmd.action) {
+       case LFUN_TABULAR_FEATURE:
+               flag.enabled(false);
+               break;
 #if 0
        case LFUN_TABULAR_FEATURE:
                // FIXME: check temporarily disabled
@@ -820,28 +939,18 @@ bool MathNestInset::getStatus(LCursor & /*cur*/, FuncRequest const & cmd,
                }
                flag.setOnOff(cmd.argument[0] == align);
                break;
+#endif
+       /// We have to handle them since 1.4 blocks all unhandled actions
+       case LFUN_ITAL:
        case LFUN_BOLD:
-               flag.setOnOff(tc == "mathbf");
-               break;
        case LFUN_SANS:
-               flag.setOnOff(tc == "mathsf");
-               break;
        case LFUN_EMPH:
-               flag.setOnOff(tc == "mathcal");
-               break;
-       case LFUN_ROMAN:
-               flag.setOnOff(tc == "mathrm");
-               break;
        case LFUN_CODE:
-               flag.setOnOff(tc == "mathtt");
-               break;
        case LFUN_NOUN:
-               flag.setOnOff(tc == "mathbb");
-               break;
+       case LFUN_ROMAN:
        case LFUN_DEFAULT:
-               flag.setOnOff(tc == "mathnormal");
+               flag.enabled(true);
                break;
-#endif
        case LFUN_MATH_MUTATE:
                //flag.setOnOff(mathcursor::formula()->hullType() == cmd.argument);
                flag.setOnOff(false);
@@ -857,6 +966,25 @@ bool MathNestInset::getStatus(LCursor & /*cur*/, FuncRequest const & cmd,
                flag.enabled(true);
                break;
 
+       case LFUN_FRAK:
+               flag.enabled(currentMode() != TEXT_MODE);
+               break;
+
+       case LFUN_INSERT_MATH: {
+               bool const textarg =
+                       arg == "\\textbf"   || arg == "\\textsf" ||
+                       arg == "\\textrm"   || arg == "\\textmd" ||
+                       arg == "\\textit"   || arg == "\\textsc" ||
+                       arg == "\\textsl"   || arg == "\\textup" ||
+                       arg == "\\texttt"   || arg == "\\textbb" ||
+                       arg == "\\textnormal";
+               flag.enabled(currentMode() != TEXT_MODE || textarg);
+               break;
+       }
+
+       case LFUN_INSERT_MATRIX:
+               flag.enabled(currentMode() == MATH_MODE);
+               break;
        default:
                ret = false;
                break;
@@ -871,45 +999,42 @@ void MathNestInset::edit(LCursor & cur, bool left)
        cur.idx() = left ? 0 : cur.lastidx();
        cur.pos() = left ? 0 : cur.lastpos();
        cur.resetAnchor();
-       lyxerr << "MathNestInset::edit, cur:\n" << cur << endl;
+       //lyxerr << "MathNestInset::edit, cur:\n" << cur << endl;
 }
 
 
-InsetBase * MathNestInset::editXY(LCursor & cur, int x, int y) const
+InsetBase * MathNestInset::editXY(LCursor & cur, int x, int y)
 {
        int idx_min = 0;
        int dist_min = 1000000;
-       for (idx_type i = 0; i < nargs(); ++i) {
-               int d = cell(i).dist(x, y);
+       for (idx_type i = 0, n = nargs(); i != n; ++i) {
+               int const d = cell(i).dist(x, y);
                if (d < dist_min) {
                        dist_min = d;
                        idx_min = i;
                }
        }
-       MathArray const & ar = cell(idx_min);
-       cur.push(const_cast<MathNestInset&>(*this));
+       MathArray & ar = cell(idx_min);
+       cur.push(*this);
        cur.idx() = idx_min;
        cur.pos() = ar.x2pos(x - ar.xo());
-       lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
+       //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
        if (dist_min == 0) {
                // hit inside cell
                for (pos_type i = 0, n = ar.size(); i < n; ++i)
                        if (ar[i]->covers(x, y))
                                return ar[i].nucleus()->editXY(cur, x, y);
        }
-       return const_cast<MathNestInset*>(this);
+       return this;
 }
 
 
 void MathNestInset::lfunMousePress(LCursor & cur, FuncRequest & cmd)
 {
-       lyxerr << "lfunMousePress: buttons: " << cmd.button() << endl;
+       //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
        if (cmd.button() == mouse_button::button1) {
-               first_x = cmd.x;
-               first_y = cmd.y;
-               lyxerr << "lfunMousePress: setting cursor to: " << cur << endl;
-               cur.resetAnchor();
-               cur.bv().cursor() = cur;
+               //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
+               cur.bv().mouseSetCursor(cur);
        }
 
        if (cmd.button() == mouse_button::button2) {
@@ -921,25 +1046,26 @@ void MathNestInset::lfunMousePress(LCursor & cur, FuncRequest & cmd)
 void MathNestInset::lfunMouseMotion(LCursor & cur, FuncRequest & cmd)
 {
        // only select with button 1
-       if (cmd.button() != mouse_button::button1)
-               return;
-
-       if (abs(cmd.x - first_x) < 2 && abs(cmd.y - first_y) < 2)
-               return;
-
-       first_x = cmd.x;
-       first_y = cmd.y;
-
-       cur.bv().cursor().setCursor(cur, true);
+       if (cmd.button() == mouse_button::button1) {
+               LCursor & bvcur = cur.bv().cursor();
+               if (bvcur.anchor_.hasPart(cur)) {
+                       //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
+                       bvcur.setCursor(cur);
+                       bvcur.selection() = true;
+                       //lyxerr << "MOTION " << bvcur << endl;
+               }
+               else {
+                       cur.undispatched();
+               }
+       }
 }
 
 
 void MathNestInset::lfunMouseRelease(LCursor & cur, FuncRequest & cmd)
 {
-       lyxerr << "lfunMouseRelease: buttons: " << cmd.button() << endl;
+       //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
 
        if (cmd.button() == mouse_button::button1) {
-               // try to dispatch to enclosed insets first
                //cur.bv().stuffClipboard(cur.grabSelection());
                return;
        }
@@ -966,7 +1092,10 @@ void MathNestInset::lfunMouseRelease(LCursor & cur, FuncRequest & cmd)
 
 bool MathNestInset::interpret(LCursor & cur, char c)
 {
-       lyxerr << "interpret 2: '" << c << "'" << endl;
+       //lyxerr << "interpret 2: '" << c << "'" << endl;
+       if (c == '^' || c == '_')
+               safe_ = grabAndEraseSelection(cur);
+
        cur.clearTargetX();
 
        // handle macroMode
@@ -1072,25 +1201,28 @@ bool MathNestInset::interpret(LCursor & cur, char c)
                return cur.pos() != cur.lastpos();
        }
 
-       if (c == '_') {
-               script(cur, false);
-               return true;
-       }
-
-       if (c == '^') {
-               script(cur, true);
-               return true;
+       // These shouldn't work in text mode:
+       if (currentMode() != MathInset::TEXT_MODE) {
+               if (c == '_') {
+                       script(cur, false);
+                       return true;
+               }
+               if (c == '^') {
+                       script(cur, true);
+                       return true;
+               }
+               if (c == '~') {
+                       cur.niceInsert(createMathInset("sim"));
+                       return true;
+               }
        }
 
-       if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' || c == '%') {
+       if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' || c == '%'
+      || c == '_' || c == '^') {
                cur.niceInsert(createMathInset(string(1, c)));
                return true;
        }
 
-       if (c == '~') {
-               cur.niceInsert(createMathInset("sim"));
-               return true;
-       }
 
        // try auto-correction
        //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
@@ -1116,7 +1248,6 @@ bool MathNestInset::script(LCursor & cur, bool up)
        }
 
        cur.macroModeClose();
-       string safe = grabAndEraseSelection(cur);
        if (asScriptInset() && cur.idx() == 0) {
                // we are in a nucleus of a script inset, move to _our_ script
                MathScriptInset * inset = asScriptInset();
@@ -1128,16 +1259,17 @@ bool MathNestInset::script(LCursor & cur, bool up)
                --cur.pos();
                MathScriptInset * inset = cur.nextAtom().nucleus()->asScriptInset();
                cur.push(*inset);
+               inset->ensure(up);
                cur.idx() = inset->idxOfScript(up);
                cur.pos() = cur.lastpos();
        } else {
                // convert the thing to our left to a scriptinset or create a new
                // one if in the very first position of the array
                if (cur.pos() == 0) {
-                       lyxerr << "new scriptinset" << endl;
+                       //lyxerr << "new scriptinset" << endl;
                        cur.insert(new MathScriptInset(up));
                } else {
-                       lyxerr << "converting prev atom " << endl;
+                       //lyxerr << "converting prev atom " << endl;
                        cur.prevAtom() = MathAtom(new MathScriptInset(cur.prevAtom(), up));
                }
                --cur.pos();
@@ -1146,9 +1278,9 @@ bool MathNestInset::script(LCursor & cur, bool up)
                cur.idx() = 1;
                cur.pos() = 0;
        }
-       lyxerr << "pasting 1: safe:\n" << safe << endl;
-       cur.paste(safe);
+       //lyxerr << "inserting 1: safe:\n" << safe_ << endl;
+       cur.niceInsert(safe_);
        cur.resetAnchor();
-       lyxerr << "pasting 2: safe:\n" << safe << endl;
+       //lyxerr << "inserting 2: safe:\n" << safe_ << endl;
        return true;
 }