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if not modules then modules = { } end modules ['tabl-ntb'] = {
version = 1.001,
comment = "companion to tabl-ntb.mkxl",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local context = context
local a_tablesection = attributes.system("tablesection")
local hlist_code = nodes.nodecodes.hlist
local nuts = nodes.nuts
local tonode = nuts.tonode
local getbox = nuts.getbox
local getlist = nuts.getlist
local getid = nuts.getid
local getnext = nuts.getnext
local setnext = nuts.setnext
local getattr = nuts.getattr
local copylist = nuts.copylist
local flushlist = nuts.flushlist
local integer_value = tokens.values.integer
local implement = interfaces.implement
local list = { }
local sections = { }
local function check(b)
local c = getbox(b)
local l = c and getlist(c)
local d = false
local n = 0
while l do
if getid(l) == hlist_code then
local line = getattr(l,a_tablesection)
if line and line ~= d then
local s = sections[line]
if s then
local count = s[2]
local last = l
local next = getnext(l)
while next and count > 0 do
last = next
next = getnext(next)
count = count - 1
end
setnext(last)
list[line] = { l, copylist(l) }
if next then
setnext(last,next)
end
d = line
end
end
n = n + 1
end
l = getnext(l)
end
end
local function reset(b)
for k, v in next, list do
flushlist(v[2])
end
list = { }
sections = { }
end
local function locate(b)
local c = getbox(b)
local l = c and getlist(c)
while l do
if getid(l) == hlist_code then
local line = getattr(l,a_tablesection)
if line then
local v = list[line]
if v and v[1] ~= l then
return line
end
end
return 0
end
l = getnext(l)
end
return 0
end
local function fetch(n)
local b = list[n]
if b then
b = copylist(b[2])
return tonode(b)
end
end
implement {
name = "tabl_ntb_set_sec",
public = true,
arguments = { "integer", "integer", "integer" },
actions = function(n,m,count)
sections[n] = { m, count }
end,
}
implement {
name = "tabl_ntb_get_sec",
public = true,
arguments = "integer",
usage = "value",
actions = function(n)
local s = sections[n]
return integer_value, s and s[1] or 0
end,
}
implement {
name = "ntb_split_section_check",
arguments = "integer",
actions = check,
}
implement {
name = "ntb_split_section_reset",
arguments = "integer",
actions = reset,
}
implement {
name = "ntb_split_section_locate",
arguments = "integer",
actions = { locate, context },
}
implement {
name = "ntb_split_section_fetch",
arguments = "integer",
actions = { fetch, context },
}
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