Re: Separate tables of contents for each section

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

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Oops, sorry for forgetting to prepend the hash mark to the identifier — a
stupid omission!
I'm glad it worked after that fix.


Den lör 1 feb. 2020 08:59Szabolcs Horvát <szhorvat-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> skrev:

> Thank you, this worked perfectly after a few minor code fixes and after
> prepending # to the identifier.
>
> For the convenience of those, who, like me, don't really know any Lua, I
> attach the fixed code.
>
> local chapter_level = 2
> local toc_level = 3
> local headings = {}
> local current_chapter = nil
>
> local function collect_headings (head)
> if head.level == chapter_level then
> local id = head.identifier
> current_chapter = {
> chapter = id,
> toc = {},
> }
> headings[id] = current_chapter
> elseif head.level == toc_level then
> if current_chapter then
> local toc = current_chapter.toc
> toc[#toc+1] = head
> end
> end
> return nil
> end
>
> local function build_toc (heads)
> local toc = {}
> for _,head in ipairs(heads) do
> local entry = {
> pandoc.Plain{
> pandoc.Link(
> head.content:clone(), -- text
> '#' .. head.identifier, -- target
> "", -- empty title
> pandoc.Attr(
> "", -- empty identifier
> {'local-toc-link'} -- class
> )
> )
> }
> }
> toc[#toc+1] = entry
> end
> return pandoc.Div(
> { pandoc.BulletList(toc) },
> pandoc.Attr( "", {'local-toc'} )
> )
> end
>
>
> local function insert_toc (head)
> if head.level == chapter_level then
> local id = head.identifier
> if headings[id] then
> local toc = build_toc(
> headings[id].toc
> )
> return {head,toc}
> end
> end
> return nil
> end
>
> return {
> { Header = collect_headings },
> { Header = insert_toc },
> }
>
>
> On Friday, 31 January 2020 21:31:31 UTC+1, BP wrote:
>>
>> I believe a change has been made so that Lua filters now traverse the
>> document in linear order. If this is the case in the latest version of
>> Pandoc it should be doable with a two-pass filter: first a pass which
>> collects the headings and then a pass which inserts the TsoC. If you want
>> hierarchical section numbering you probably also need to do a first pandoc
>> run which inserts the numbering and then a second pandoc run with the
>> filter to insert the TsoC.  Something like this:
>>
>> (Warning 1: Untested code!
>>   Warning 2: Make sure not to overwrite any existing file!
>>   Warning 3: Assumes that all chapters are heading level 2 — change the
>> chapter_level and toc_level variables to match!
>>    Warning 4: Assumes that each section/chapter has a unique identifier!
>> )
>>
>> local chapter_level = 2
>> local toc_level = 3
>> local headings = {}
>> local current_chapter = nil
>>
>> local function collect_headings (head)
>>   if head.level == chapter_level then
>>     local id = head.identifier
>>     current_chapter = {
>>       chapter = id
>>       toc = {}
>>     }
>>     headings[id] = current_chapter
>>   elseif head.level = toc_level then
>>     if current_chapter then
>>       local toc = current_chapter.toc
>>       toc[#toc+1] = head
>>     end
>>   end
>>   return nil
>> end
>>
>> local function build_toc (heads)
>>   local toc = {}
>>   for _,head in ipairs(heads) do
>>     local entry = {
>>       pandoc.Plain{
>>         pandoc.Link(
>>           head.content:clone(), -- text
>>           head.identifier, -- target
>>           "", -- empty title
>>           pandoc.Attr(
>>             "", -- empty identifier
>>             {'local-toc-link'} -- class
>>           )
>>         )
>>       }
>>     }
>>     toc[#toc+1] = entry
>>   end
>>   return pandoc.Div(
>>     { pandoc.BulletList(toc) },
>>     pandoc.Attr( "", {'local-toc'} )
>>   )
>> end
>>
>>
>> local function insert_toc (head)
>>   if head.level = chapter_level then
>>     local id = head.identifier
>>     if headings[id] then
>>       local toc = build_toc(
>>         headings[id].toc
>>       )
>>       return {head,toc}
>>     end
>>   end
>>   return nil
>> end
>>
>> return {
>>   { Header = collect_headings },
>>   { Header = insert_toc },
>> }
>>
>>
>> Den fre 31 jan. 2020 19:27Szabolcs Horvát <szho...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> skrev:
>>
>>> Hello everyone,
>>>
>>> I am converting a Markdown file to HTML.
>>>
>>> I can insert a table of contents at the beginning using the --toc option.
>>>
>>> Is it possible to insert additional tables of contents under each
>>> level-two or level-three heading?
>>>
>>> I am looking to create something similar to the organization of this
>>> page: https://igraph.org/c/doc/igraph-Visitors.html#idm209455316208
>>>
>>> Szabolcs
>>>
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>>> .
>>>
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