support reading TeX's $$...$$ syntax

[features.git] / src / mathed / math_gridinset.C

diff --git a/src/mathed/math_gridinset.C b/src/mathed/math_gridinset.C
index 074b76fbfe3f400d9476f0d1f2075cb337d5b01f..9957c17b82982dc2b9f06d1ac23a98f4107a6790 100644 (file)
--- a/src/mathed/math_gridinset.C
+++ b/src/mathed/math_gridinset.C
@@ -464,20 +464,26 @@ void MathGridInset::idxDelete(idx_type & idx, bool & popit, bool & deleteit)
        popit    = false;
        deleteit = false;
 
-       // delete entire row if in first cell of empty row
-       if (col(idx) == 0 && nrows() > 1) {
+       // delete entire sequence of ncols() empty cells if possible
+       if (idx <= index(nrows() - 1, 0))       {
                bool deleterow = true;
                for (idx_type i = idx; i < idx + ncols(); ++i)
                        if (cell(i).size()) {
                                deleterow = false;
                                break;
                        }
-               if (deleterow) 
+
+               if (deleterow) {
+                       // move cells if necessary
+                       for (idx_type i = index(row(idx), 0); i < idx; ++i)
+                               cell(i).swap(cell(i + ncols()));
+                       
                        delRow(row(idx));
 
-               if (idx >= nargs())
-                       idx = nargs() - 1;
-               return;
+                       if (idx >= nargs())
+                               idx = nargs() - 1;
+                       return;
+               }
        }
 
        // undo effect of Ctrl-Tab (i.e. pull next cell)