Re: MWE for building a table using Lua

[BPJ <bpj-J3H7GcXPSITLoDKTGw+V6w@public.gmane.org>]

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Den tors 26 maj 2022 12:53K4zuki <k.yamamoto.08136891-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> skrev:

> hint 1 - my note about Table structure (might be inaccurate w/ 2.18):
>     https://gist.github.com/K4zuki/04e1e1af2fcf06db1a6ea640aa8feadd
>

Thanks for this! My own stab at this, which may be seriously outdated, is
here:

https://groups.google.com/g/pandoc-discuss/c/XE9YdlJNamU/m/oWZapmV5CwAJ

I was aiming at the JSON structure because my intention was to implement
support for complex tables in Perl JSON filters, which I still use from
time to time because Perl has real Unicode support!

As for col/row spans: doesn't the HTML reader/writer support them yet?


hint 2 - my implementation in a filter (
> https://github.com/pandocker/pandocker-lua-filters/blob/master/lua/csv2table.lua
> ):
> 1. prepare a minimum table markdown text as a local variable
> 2. let pandoc convert the text, then extract Table object
> ```lua
> local table_template = [==[
> | table |
> |-------|
> | cell |
>
> Table: caption
> ]==]
>
> local my_table = pandoc.read(table_template, "markdown").blocks[1]
> ```
> 3. clone the object and replace the contents
>

Nice trick — once you have grokked the structure.



> 2022年5月26日木曜日 18:06:06 UTC+9 Bastien Dumont:
>
>> The constructors don't take tables as their argument, but discrete
>> values. I have not found the definition of the constructors in the official
>> documentation, but you can look into this filter to see how they work:
>> https://github.com/pandoc/lua-filters/blob/master/list-table/list-table.lua
>>
>> Le Thursday 26 May 2022 à 01:53:39AM, msprev a écrit :
>> > This creates the following structure -- all ok, except the table body,
>> which is
>> > empty ('[]'), and I cannot get it to appear. Any suggestions on what
>> I'm doing
>> > wrong would be gratefully received.
>> >
>> > ```
>> > Table
>> > ( "" , [] , [] )
>> > (Caption Nothing [])
>> > [ ( AlignLeft , ColWidthDefault )
>> > , ( AlignDefault , ColWidthDefault )
>> > ]
>> > (TableHead ( "" , [] , [] ) [])
>> > []
>> > (TableFoot ( "" , [] , [] ) [])
>> > ```
>> > On Wednesday, May 25, 2022 at 12:48:06 PM UTC+1 msprev wrote:
>> >
>> > I've been struggling to get my head around handling tables with Lua in
>> > pandoc 2.18. I'm trying to write a minimal working example to create a
>> > table as I can't seem to find one online. The code below does create a
>> > table, but with any empty table body and I can't figure out how to get
>> the
>> > body to appear. Can anyone help tell me what has gone wrong here?
>> >
>> > BTW, I tried to call the pandoc.TableBody() constructor, but that
>> throws an
>> > error as it doesn't seem to be defined ("attempt to call a nil value
>> (field
>> > 'TableBody')")
>> >
>> > ```
>> > local caption = {long = {}}
>> > local colspecs = {{pandoc.AlignLeft, pandoc.ColWidthDefault},
>> > {pandoc.AlignDefault, pandoc.ColWidthDefault}}
>> > local head = pandoc.TableHead()
>> > local cell1contents = { pandoc.Plain({pandoc.Str("cell1")}) }
>> > local cell2contents = { pandoc.Plain({pandoc.Str("cell2")}) }
>> > local cell1 = { alignment=pandoc.AlignDefault, contents=cell1contents,
>> > col_span=1, row_span=1 }
>> > local cell2 = { alignment=pandoc.AlignDefault, contents=cell2contents,
>> > col_span=1, row_span=1 }
>> > local row1 = { cells={pandoc.Cell(cell1), pandoc.Cell(cell2)} }
>> > local rows = { pandoc.Row(row1) }
>> > local bodies = { body=rows, head={}, row_head_columns=0 }
>> > local foot = pandoc.TableFoot()
>> > local mytable = pandoc.Table(caption, colspecs, head, bodies, foot)
>> > table.insert(doc.blocks, mytable)
>> > ```
>> >
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>> >
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>> >
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>> > [2]
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