Fix.

[lyx.git] / src / mathed / math_cursor.C

diff --git a/src/mathed/math_cursor.C b/src/mathed/math_cursor.C
index f31fc0bf416b626d1a26e462f24b735f3531b04e..5e89cc4b87dcac47d4ef45afeda15ffc1a9f23eb 100644 (file)
--- a/src/mathed/math_cursor.C
+++ b/src/mathed/math_cursor.C
@@ -410,56 +410,66 @@ void MathCursor::paste(string const & data)
 }
 
 
-void MathCursor::backspace()
+bool MathCursor::backspace()
 {
        autocorrect_ = false;
 
        if (selection_) {
                selDel();
-               return;
+               return true;
        }
 
        if (pos() == 0) {
-               pullArg();
-               return;
+               if (par()->ncols() == 1 && par()->nrows() == 1 && depth() == 1 && size() == 0)
+                       return false;
+               else{
+                       pullArg();
+                       return true;
+               }
        }
 
        if (inMacroMode()) {
                MathUnknownInset * p = activeMacro();
                if (p->name().size() > 1) {
                        p->setName(p->name().substr(0, p->name().size() - 1));
-                       return;
+                       return true;
                }
        }
 
        --pos();
        plainErase();
+        return true;
 }
 
 
-void MathCursor::erase()
+bool MathCursor::erase()
 {
        autocorrect_ = false;
        if (inMacroMode())
-               return;
+               return true;
 
        if (selection_) {
                selDel();
-               return;
+               return true;
        }
 
        // delete empty cells if possible
        if (array().empty())
                if (par()->idxDelete(idx()))
-                       return;
+                       return true;
 
        // old behaviour when in last position of cell
        if (pos() == size()) {
-               par()->idxGlue(idx());
-               return;
+               if (par()->ncols() == 1 && par()->nrows() == 1 && depth() == 1 && size() == 0)
+                       return false;
+               else{
+                       par()->idxGlue(idx());
+                       return true;
+               }
        }
 
        plainErase();
+       return true;
 }