Hierarchical cell merge

[janisz]

Let's say we have following table:

0	1	2	3
A	a	c	0
A	b	c	0
A	b	d	0
B	b	d	0

writer.SetHeader([]string{"0", "1", "2", "3"})
writer.Append([]string{"A", "a", "c", "-"})
writer.Append([]string{"A", "b", "c", "-"})
writer.Append([]string{"A", "b", "d", "-"})
writer.Append([]string{"B", "b", "d", "-"})
writer.Render()

SetAutoMergeCells(false)

+---+---+---+---+
| 0 | 1 | 2 | 3 |
+---+---+---+---+
| A | a | c | - |
+---+---+---+---+
| A | b | c | - |
+---+---+---+---+
| A | b | d | - |
+---+---+---+---+
| B | b | d | - |
+---+---+---+---+

SetAutoMergeCells(true)

+---+---+---+---+
| 0 | 1 | 2 | 3 |
+---+---+---+---+
| A | a | c | - |
+   +---+   +   +
|   | b |   |   |
+   +   +---+   +
|   |   | d |   |
+---+   +   +   +
| B |   |   |   |
+---+---+---+---+

I'd like to get hierarchical merging: cells are merged only if prepending cell was merged. How can I achieve this?

+---+---+---+---+
| 0 | 1 | 2 | 3 |
+---+---+---+---+
| A | a | c | - |
+   +---+---+---+
|   | b | c | - |
+   +   +---+---+
|   |   | d | - |
+---+---+---+---+
| B | b | d | - |
+---+---+---+---+

[dwertent]

Does this project have maintainers?

If so, I will like to fix this.
If not, I don't mind taking over the project.

I have other issues with this table I'm planning on fixing.