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if not modules then modules = { } end modules ['node-shp'] = {
version = 1.001,
comment = "companion to node-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local nodes, node = nodes, node
local nodecodes = nodes.nodecodes
local tasks = nodes.tasks
local hlist_code = nodecodes.hlist
local vlist_code = nodecodes.vlist
local disc_code = nodecodes.disc
local mark_code = nodecodes.mark
local kern_code = nodecodes.kern
local glue_code = nodecodes.glue
local free_node = node.free
local remove_node = node.remove
local function cleanup(head) -- rough
local start = head
while start do
local id = start.id
if id == disc_code or (id == glue_code and not start.writable) or (id == kern_code and start.kern == 0) or id == mark_code then
head, start, tmp = remove_node(head,start)
free_node(tmp)
elseif id == hlist_code or id == vlist_code then
local sl = start.list
if sl then
start.list = cleanup(sl)
start = start.next
else
head, start, tmp = remove_node(head,start)
free_node(tmp)
end
else
start = start.next
end
end
return head
end
directives.register("backend.cleanup", function()
tasks.enableaction("shipouts","nodes.handlers.cleanuppage")
end)
function nodes.handlers.cleanuppage(head)
-- about 10% of the nodes make no sense for the backend
return cleanup(head), true
end
local actions = tasks.actions("shipouts",0) -- no extra arguments
function nodes.handlers.finalize(head) -- problem, attr loaded before node, todo ...
return actions(head)
end
--~ nodes.handlers.finalize = actions
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