DOCX reader to support row head

[rgaiacs]

Pandoc types has support for row head, see https://pandoc.org/lua-filters.html#type-tablebody, and Microsoft Word allows users to apply "special formatting for the first column", see the "Table Style Options" in the screenshot.

DOCX reader could treat the selection of "special formatting for the first column" as "the first column is a header".

Minimal Working Examples

table-2x2-single-header.docx

table-2x2-two-headers.docx

XML structure

table-2x2-single-header.docx has

    <w:tbl>
      <w:tblPr>
        <w:tblStyle w:val="GridTable5Dark-Accent1"/>
        <w:tblW w:w="0" w:type="auto"/>
        <w:tblLook w:val="0420" w:firstRow="1" w:lastRow="0" w:firstColumn="0" w:lastColumn="0" w:noHBand="0" w:noVBand="1"/>
      </w:tblPr>

and table-2x2-two-headers.docx has

    <w:tbl>
      <w:tblPr>
        <w:tblStyle w:val="GridTable5Dark-Accent1"/>
        <w:tblW w:w="0" w:type="auto"/>
        <w:tblLook w:val="04A0" w:firstRow="1" w:lastRow="0" w:firstColumn="1" w:lastColumn="0" w:noHBand="0" w:noVBand="1"/>
      </w:tblPr>

DOCX reader need to check the value of w:firstColumn in <w:tblLook />.

Current Reading

pandoc --from docx --to native table-2x2-two-headers.docx produces

[ Table
    ( "" , [] , [] )
    (Caption Nothing [])
    [ ( AlignDefault , ColWidth 0.5 )
    , ( AlignDefault , ColWidth 0.5 )
    ]
    (TableHead
       ( "" , [] , [] )
       [ Row
           ( "" , [] , [] )
           [ Cell
               ( "" , [] , [] )
               AlignDefault
               (RowSpan 1)
               (ColSpan 1)
               [ Plain [ Str "1" ] ]
           , Cell
               ( "" , [] , [] )
               AlignDefault
               (RowSpan 1)
               (ColSpan 1)
               [ Plain [ Str "2" ] ]
           ]
       ])
    [ TableBody
        ( "" , [] , [] )
        (RowHeadColumns 0)
        []
        [ Row
            ( "" , [] , [] )
            [ Cell
                ( "" , [] , [] )
                AlignDefault
                (RowSpan 1)
                (ColSpan 1)
                [ Plain [ Str "3" ] ]
            , Cell
                ( "" , [] , [] )
                AlignDefault
                (RowSpan 1)
                (ColSpan 1)
                [ Plain [ Str "4" ] ]
            ]
        ]
    ]
    (TableFoot ( "" , [] , [] ) [])
]

Desired Reading

pandoc --from docx --to native table-2x2-two-headers.docx should produce

[ Table
    ( "" , [] , [] )
    (Caption Nothing [])
    [ ( AlignDefault , ColWidth 0.5 )
    , ( AlignDefault , ColWidth 0.5 )
    ]
    (TableHead
       ( "" , [] , [] )
       [ Row
           ( "" , [] , [] )
           [ Cell
               ( "" , [] , [] )
               AlignDefault
               (RowSpan 1)
               (ColSpan 1)
               [ Plain [ Str "1" ] ]
           , Cell
               ( "" , [] , [] )
               AlignDefault
               (RowSpan 1)
               (ColSpan 1)
               [ Plain [ Str "2" ] ]
           ]
       ])
    [ TableBody
        ( "" , [] , [] )
        (RowHeadColumns 1)
        []
        [ Row
            ( "" , [] , [] )
            [ Cell
                ( "" , [] , [] )
                AlignDefault
                (RowSpan 1)
                (ColSpan 1)
                [ Plain [ Str "3" ] ]
            , Cell
                ( "" , [] , [] )
                AlignDefault
                (RowSpan 1)
                (ColSpan 1)
                [ Plain [ Str "4" ] ]
            ]
        ]
    ]
    (TableFoot ( "" , [] , [] ) [])
]

The value of RowHeadColumns is now 1.

Environment

pandoc --version returns

pandoc 3.1.11.1
Features: +server +lua
Scripting engine: Lua 5.4
User data directory: /home/raniere/.local/share/pandoc
Copyright (C) 2006-2023 John MacFarlane. Web: https://pandoc.org
This is free software; see the source for copying conditions. There is no
warranty, not even for merchantability or fitness for a particular purpose.

[jgm]

I think I may have to revert this one.
Reason: #10627
(If Word didn't set firstColumn="1" by default, this would be fine.)