about summary refs log tree commit diff
path: root/preproc.lua
blob: 6bfa8c5fc1c51e04a6c8659fbd071a7fa6868115 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
---@diagnostic disable: undefined-global
-- see https://pandoc.org/lua-filters.html
return {
    Pandoc = function(doc)
        local front = {}

        local toc = pandoc.structure.table_of_contents(doc)
        if doc.meta.toc and toc then
            table.insert(front, pandoc.RawBlock("html5", '<nav class="table-of-contents capital">'))
            table.insert(front, pandoc.RawBlock("html5", "<ol>"))
            -- insert jump to top
            table.insert(front, pandoc.Link("back to top", "#top"))
            -- create custom toc
            toc:walk({
                Link = function(e)
                    table.insert(front, pandoc.RawBlock("html5", "<li>"))
                    table.insert(front, e)
                    table.insert(front, pandoc.RawBlock("html5", "</li>"))
                end,
            })
            table.insert(front, pandoc.RawBlock("html5", "</ol>"))
            table.insert(front, pandoc.RawBlock("html5", "</nav>"))
        end

        -- insert date blocks
        if doc.meta.date then
            table.insert(front, pandoc.RawBlock("html5", '<span class="date">'))
            table.insert(front, doc.meta.date)
            table.insert(front, pandoc.RawBlock("html5", "</span>"))
        end

        -- prepend front stuffs
        for i = #front, 1, -1 do
            table.insert(doc.blocks, 1, front[i])
        end

        -- return finished ast
        return doc
    end,
}