Fix #988. Note that this introduces a new translatable message

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17429 a592a061-630c-0410-9148-cb99ea01b6c8

diff --git a/src/mathed/InsetMathNest.C b/src/mathed/InsetMathNest.C
index 84883636161e650fb5e3f0bc8df5c288af326fd9..b41577c6b380a588843148565183f5b90ae3cefb 100644 (file)
--- a/src/mathed/InsetMathNest.C
+++ b/src/mathed/InsetMathNest.C
@@ -1206,9 +1206,16 @@ void InsetMathNest::lfunMouseRelease(LCursor & cur, FuncRequest & cmd)
 }
 
 
+// return false when we leave the formula
 bool InsetMathNest::interpretChar(LCursor & cur, char_type c)
 {
        //lyxerr << "interpret 2: '" << c << "'" << endl;
+       if (currentMode() == TEXT_MODE && (c == '^' || c == '_')) {
+               theLyXFunc().setMessage(
+                       _("Superscripts and subscripts are not allowed in math text mode."));
+               return true;
+       }
+
        docstring save_selection;
        if (c == '^' || c == '_')
                save_selection = grabAndEraseSelection(cur);