[calc] merge cells borders

[Kohei Yoshida]

On Thu, 2014-06-12 at 06:45 +0000, Faisal M. Alotaibi wrote:
> Hi,
> 
> i am working on this Bug 34837
> could anyone help me to get the code that responsible for merge cells
> in calc

Merge cells are defined by virtue of cell attributes.  The top left (or
top right in case of RTL) merge cell contains the size of the merged
area (column x row) while the rest of the cells have "overlapped
vertical" or "overlapped horizontal" flag, or both.  Grep the code in sc
for ATTR_MERGE and ATTR_MERGE_FLAG for how merged cells are handled.

Cell attributes are stored with each column.  Take a look at ScColumn
which has pAttrArray of type ScAttrArray as its member, which is where
all cell attributes are stored.

Kohei