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ANSI writer: Apply row spans in tables (#11294)

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The ANSI writer is now able to keep track of row spans and apply them in rows.

[API change] T.P.Writers.Shared:
Add functions `insertCurrentSpansAtColumn`, `takePreviousSpansAtColumn`
and `decrementTrailingRowSpans` for applying and keeping track of
RowSpans over multiple rows.

Fixes: #10149
This commit is contained in:
Tuong Nguyen Manh
2025-11-30 13:20:30 +01:00
committed by GitHub
parent 6592dfb082
commit 58e741a0d6
4 changed files with 382 additions and 32 deletions
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test/command/10149.md
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Row spans
```
% pandoc -f html --columns 24 -t ansi
<table>
<thead>
<tr>
<td rowspan="3">1</td>
<td>2</td>
<td>3</td>
<td>4</td>
<td rowspan="4">5</td>
<td>6</td>
</tr>
<tr>
<td>2</td>
<td colspan="2" rowspan="2">3</td>
<td>6</td>
</tr>
<tr>
<td rowspan="2">2</td>
<td>6</td>
</tr>
<tr>
<td>1</td>
<td>3</td>
<td>4</td>
<td>6</td>
</tr>
</thead>
<tbody>
<tr>
<td colspan="2">a</td>
<td rowspan="2">c</td>
<td>d</td>
<td>e</td>
<td>f</td>
</tr>
<tr>
<td>a</td>
<td>b</td>
<td colspan="3" rowspan="2">d</td>
</tr>
<tr>
<td>a</td>
<td>b</td>
<td>c</td>
</tr>
</tbody>
<tfoot>
<tr>
<td colspan="2" rowspan="4">A</td>
<td>C</td>
<td>D</td>
<td colspan="2" rowspan="3">E</td>
</tr>
<tr>
<td>C</td>
<td>D</td>
</tr>
<tr>
<td>C</td>
<td>D</td>
</tr>
<tr>
<td>C</td>
<td>D</td>
<td>E</td>
<td>F</td>
</tr>
</tfoot>
</table>
^D
1 2 3 4 5 6
2 3 6
2 6
1 3 4 6
─── ─── ─── ─── ─── ───
a c d e f
a b d
a b c
─── ─── ─── ─── ─── ───
A C D E
C D
C D
C D E F]8;;\
```
Empty rows
```
% pandoc -f native --columns 12 -t ansi
[ Table
( "" , [] , [] )
(Caption Nothing [])
[ ( AlignDefault , ColWidthDefault )
, ( AlignDefault , ColWidthDefault )
, ( AlignDefault , ColWidthDefault )
]
(TableHead
( "" , [] , [] )
[ Row
( "" , [] , [] )
[ Cell
( "" , [] , [] )
AlignDefault
(RowSpan 3)
(ColSpan 2)
[ Plain [ Str "1" ] ]
, Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "3" ] ]
]
, Row
( "" , [] , [] )
[ Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "3" ] ]
]
, Row ( "" , [] , [] ) []
, Row
( "" , [] , [] )
[ Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "1" ] ]
, Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "2" ] ]
, Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "3" ] ]
]
])
[ TableBody
( "" , [] , [] )
(RowHeadColumns 0)
[]
[ Row
( "" , [] , [] )
[ Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "1" ] ]
, Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "2" ] ]
, Cell
( "" , [] , [] )
AlignDefault
(RowSpan 2)
(ColSpan 1)
[ Plain [ Str "3" ] ]
]
, Row
( "" , [] , [] )
[ Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "1" ] ]
, Cell
( "" , [] , [] )
AlignDefault
(RowSpan 4)
(ColSpan 1)
[ Plain [ Str "2" ] ]
]
, Row
( "" , [] , [] )
[ Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "1" ] ]
, Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "3" ] ]
]
, Row ( "" , [] , [] ) []
, Row
( "" , [] , [] )
[ Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "1" ] ]
, Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "3" ] ]
]
]
]
(TableFoot
( "" , [] , [] )
[ Row
( "" , [] , [] )
[ Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "1" ] ]
, Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "2" ] ]
, Cell
( "" , [] , [] )
AlignDefault
(RowSpan 2)
(ColSpan 1)
[ Plain [ Str "3" ] ]
]
, Row ( "" , [] , [] ) []
, Row
( "" , [] , [] )
[ Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "1" ] ]
, Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "2" ] ]
, Cell
( "" , [] , [] )
AlignDefault
(RowSpan 3)
(ColSpan 1)
[ Plain [ Str "3" ] ]
]
, Row
( "" , [] , [] )
[ Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "1" ] ]
, Cell
( "" , [] , [] )
AlignDefault
(RowSpan 1)
(ColSpan 1)
[ Plain [ Str "2" ] ]
]
, Row ( "" , [] , [] ) []
])
]
^D
1 3
3
1 2 3
─── ─── ───
1 2 3
1 2
1 3
1 3
─── ─── ───
1 2 3
1 2 3
1 2]8;;\
```