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if not modules then modules = { } end modules ['node-res'] = {
version = 1.001,
comment = "companion to node-ini.tex",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local gmatch, format = string.gmatch, string.format
local copy_node, free_node, new_node = node.copy, node.free, node.new
--[[ldx--
<p>The next function is not that much needed but in <l n='context'/> we use
for debugging <l n='luatex'/> node management.</p>
--ldx]]--
nodes = nodes or { }
local reserved = { }
function nodes.register(n)
reserved[#reserved+1] = n
return n
end
function nodes.cleanup_reserved(nofboxes) -- todo
nodes.tracers.steppers.reset() -- todo: make a registration subsystem
local nr, nl = #reserved, 0
for i=1,nr do
free_node(reserved[i])
end
if nofboxes then
local tb = tex.box
for i=0,nofboxes do
local l = tb[i]
if l then
free_node(tb[i])
nl = nl + 1
end
end
end
reserved = { }
return nr, nl, nofboxes -- can be nil
end
function nodes.usage()
local t = { }
for n, tag in gmatch(status.node_mem_usage,"(%d+) ([a-z_]+)") do
t[tag] = n
end
return t
end
local pdfliteral = nodes.register(new_node("whatsit",8)) pdfliteral.mode = 1
local disc = nodes.register(new_node("disc"))
local kern = nodes.register(new_node("kern",1))
local penalty = nodes.register(new_node("penalty"))
local glue = nodes.register(new_node("glue"))
local glue_spec = nodes.register(new_node("glue_spec"))
local glyph = nodes.register(new_node("glyph",0))
local textdir = nodes.register(new_node("whatsit",7))
local rule = nodes.register(new_node("rule"))
function nodes.glyph(fnt,chr)
local n = copy_node(glyph)
if fnt then n.font = fnt end
if chr then n.char = chr end
return n
end
function nodes.penalty(p)
local n = copy_node(penalty)
n.penalty = p
return n
end
function nodes.kern(k)
local n = copy_node(kern)
n.kern = k
return n
end
function nodes.glue(width,stretch,shrink)
local n, s = copy_node(glue), copy_node(glue_spec)
s.width, s.stretch, s.shrink = width, stretch, shrink
n.spec = s
return n
end
function nodes.glue_spec(width,stretch,shrink)
local s = copy_node(glue_spec)
s.width, s.stretch, s.shrink = width, stretch, shrink
return s
end
function nodes.disc()
return copy_node(disc)
end
function nodes.pdfliteral(str)
local t = copy_node(pdfliteral)
t.data = str
return t
end
function nodes.textdir(dir)
local t = copy_node(textdir)
t.dir = dir
return t
end
function nodes.rule(w,h,d)
local n = copy_node(rule)
if w then n.width = w end
if h then n.height = h end
if d then n.depth = d end
return n
end
statistics.register("cleaned up reserved nodes", function()
return format("%s nodes, %s lists of %s", nodes.cleanup_reserved(tex.count["lastallocatedbox"]))
end) -- \topofboxstack
statistics.register("node memory usage", function() -- comes after cleanup !
return status.node_mem_usage
end)
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