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if not modules then modules = { } end modules ['node-res'] = {
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 gmatch, format = string.gmatch, string.format
local copy_node, free_node, free_list, new_node = node.copy, node.free, node.flush_list, 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 { }
nodes.whatsits = { } -- table.swapped(node.whatsits())
local reserved = { }
local whatsits = nodes.whatsits
for k, v in pairs(node.whatsits()) do
whatsits[k], whatsits[v] = v, k -- two way
end
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 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",whatsits.dir)) -- 7
local rule = nodes.register(new_node("rule"))
local latelua = nodes.register(new_node("whatsit",whatsits.late_lua)) -- 35
local user_n = nodes.register(new_node("whatsit",whatsits.user_defined)) user_n.type = 100 -- 44
local user_l = nodes.register(new_node("whatsit",whatsits.user_defined)) user_l.type = 110 -- 44
local user_s = nodes.register(new_node("whatsit",whatsits.user_defined)) user_s.type = 115 -- 44
local user_t = nodes.register(new_node("whatsit",whatsits.user_defined)) user_t.type = 116 -- 44
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.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
function nodes.latelua(code)
local n = copy_node(latelua)
n.data = code
return n
end
local cache = { }
function nodes.usernumber(num)
local n = cache[num]
if n then
return copy_node(n)
else
local n = copy_node(user_n)
if num then n.value = num end
return n
end
end
function nodes.userlist(list)
local n = copy_node(user_l)
if list then n.value = list end
return n
end
local cache = { } -- we could use the same cache
function nodes.userstring(str)
local n = cache[str]
if n then
return copy_node(n)
else
local n = copy_node(user_s)
n.type = 115
if str then n.value = str end
return n
end
end
function nodes.usertokens(tokens)
local n = copy_node(user_t)
if tokens then n.value = tokens 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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