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if not modules then modules = { } end modules ['strc-lev'] = {
version = 1.001,
comment = "companion to strc-lev.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local insert, remove = table.insert, table.remove
local settings_to_array = utilities.parsers.settings_to_array
local context = context
local interfaces = interfaces
local sections = structures.sections
local implement = interfaces.implement
local v_default = interfaces.variables.default
sections.levels = sections.levels or { }
local level = 0
local levels = sections.levels
local categories = { }
local f_two_colon = string.formatters["%s:%s"]
storage.register("structures/sections/levels", levels, "structures.sections.levels")
local function definesectionlevels(category,list)
list = settings_to_array(list)
for i=1,#list do
list[i] = settings_to_array(list[i])
end
levels[category] = list
end
local ctx_nostarthead = context.nostarthead
local ctx_dostarthead = context.dostarthead
local ctx_nostophead = context.nostophead
local ctx_dostophead = context.dostophead
local function startsectionlevel(n,category,current)
category = category ~= "" and category or v_default
local lc = levels[category]
for i=1,#lc do
local lcl = lc[i]
if (lcl[n] or lcl[1]) == current then
level = i
break
end
end
level = level + 1
if not lc or level > #lc then
ctx_nostarthead { f_two_colon(category,level) }
else
local lcl = lc[level]
if n > #lcl then
n = #lcl
end
ctx_dostarthead { lc[level][n] }
end
insert(categories,{ category, n })
end
local function stopsectionlevel()
local top = remove(categories)
if top then
local category = top[1]
local n = top[2]
local lc = levels[category]
if not lc or level > #lc then
ctx_nostophead { f_two_colon(category,level) }
else
ctx_dostophead { lc[level][n] }
end
level = level - 1
else
-- error
end
end
implement {
name = "definesectionlevels",
actions = definesectionlevels,
arguments = { "string", "string" },
}
implement {
name = "startsectionlevel",
actions = startsectionlevel,
arguments = { "integer", "string", "string" },
}
implement {
name = "stopsectionlevel",
actions = stopsectionlevel,
}
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