summaryrefslogtreecommitdiff
path: root/tex/context/base/mkxl/spac-hor.lmt
blob: a4a8f0ade526c3bed2dcee3e701dff6c2e0f2eee (plain)
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
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
if not modules then modules = { } end modules ['spac-hor'] = {
    version   = 1.001,
    comment   = "companion to spac-hor.mkiv",
    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
    copyright = "PRAGMA ADE / ConTeXt Development Team",
    license   = "see context related readme files"
}

local chardata  = characters.data
local peekchar  = tokens.scanners.peekchar
local ctx_space = context.space

local can_have_space = characters.can_have_space

interfaces.implement {
    name      = "autoinsertnextspace",
    protected = true,
    public    = true,
    actions   = function()
        local char = peekchar() -- nil means space command
        if char then
            local d = chardata[char]
            if d and can_have_space[d.category] then
                ctx_space()
            end
        end
    end,
}

local nuts = nodes.nuts
local tonut = nodes.tonut
local traverseglue = nuts.traversers.glue
local setwidth = nodes.nuts.setwidth
local indentskip_code = nodes.gluecodes.indentskip
local texgetnest = tex.getnest

local function lateindent(amount)
    local head = tonut(texgetnest("top","head"))
    if head then
        for n, s in traverseglue, head do
            if s == indentskip_code then
                setwidth(n,amount or 0)
            end
        end
    end
end

interfaces.implement {
    name      = "lateindent",
    public    = true,
    protected = "true",
    arguments = "dimension",
    actions   = lateindent,
}
interfaces.implement {
    name      = "lateundent",
    public    = true,
    protected = "true",
    actions   = lateindent,
}