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if not modules then modules = { } end modules ['luatex-fonts-nod'] = {
version = 1.001,
comment = "companion to luatex-fonts.lua",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
if context then
texio.write_nl("fatal error: this module is not for context")
os.exit()
end
-- Don't depend on code here as it is only needed to complement the
-- font handler code.
-- Attributes:
if tex.attribute[0] ~= 0 then
texio.write_nl("log","!")
texio.write_nl("log","! Attribute 0 is reserved for ConTeXt's font feature management and has to be")
texio.write_nl("log","! set to zero. Also, some attributes in the range 1-255 are used for special")
texio.write_nl("log","! purposes so setting them at the TeX end might break the font handler.")
texio.write_nl("log","!")
tex.attribute[0] = 0 -- else no features
end
attributes = attributes or { }
attributes.unsetvalue = -0x7FFFFFFF
local numbers, last = { }, 127
attributes.private = attributes.private or function(name)
local number = numbers[name]
if not number then
if last < 255 then
last = last + 1
end
number = last
numbers[name] = number
end
return number
end
-- Nodes:
nodes = { }
nodes.pool = { }
nodes.handlers = { }
local nodecodes = { } for k,v in next, node.types () do nodecodes[string.gsub(v,"_","")] = k end
local whatcodes = { } for k,v in next, node.whatsits() do whatcodes[string.gsub(v,"_","")] = k end
local glyphcodes = { [0] = "character", "glyph", "ligature", "ghost", "left", "right" }
local disccodes = { [0] = "discretionary", "explicit", "automatic", "regular", "first", "second" }
nodes.nodecodes = nodecodes
nodes.whatcodes = whatcodes
nodes.whatsitcodes = whatcodes
nodes.glyphcodes = glyphcodes
nodes.disccodes = disccodes
local free_node = node.free
local remove_node = node.remove
local new_node = node.new
local traverse_id = node.traverse_id
nodes.handlers.protectglyphs = node.protect_glyphs
nodes.handlers.unprotectglyphs = node.unprotect_glyphs
local math_code = nodecodes.math
local end_of_math = node.end_of_math
function node.end_of_math(n)
if n.id == math_code and n.subtype == 1 then
return n
else
return end_of_math(n)
end
end
function nodes.remove(head, current, free_too)
local t = current
head, current = remove_node(head,current)
if t then
if free_too then
free_node(t)
t = nil
else
t.next, t.prev = nil, nil
end
end
return head, current, t
end
function nodes.delete(head,current)
return nodes.remove(head,current,true)
end
function nodes.pool.kern(k)
local n = new_node("kern",1)
n.kern = k
return n
end
-- experimental
local getfield = node.getfield or function(n,tag) return n[tag] end
local setfield = node.setfield or function(n,tag,value) n[tag] = value end
nodes.getfield = getfield
nodes.setfield = setfield
nodes.getattr = getfield
nodes.setattr = setfield
if node.getid then nodes.getid = node.getid else function nodes.getid (n) return getfield(n,"id") end end
if node.getsubtype then nodes.getsubtype = node.getsubtype else function nodes.getsubtype(n) return getfield(n,"subtype") end end
if node.getnext then nodes.getnext = node.getnext else function nodes.getnext (n) return getfield(n,"next") end end
if node.getprev then nodes.getprev = node.getprev else function nodes.getprev (n) return getfield(n,"prev") end end
if node.getchar then nodes.getchar = node.getchar else function nodes.getchar (n) return getfield(n,"char") end end
if node.getfont then nodes.getfont = node.getfont else function nodes.getfont (n) return getfield(n,"font") end end
if node.getlist then nodes.getlist = node.getlist else function nodes.getlist (n) return getfield(n,"list") end end
function nodes.tonut (n) return n end
function nodes.tonode(n) return n end
-- being lazy ... just copy a bunch ... not all needed in generic but we assume
-- nodes to be kind of private anyway
nodes.tostring = node.tostring or tostring
nodes.copy = node.copy
nodes.copy_list = node.copy_list
nodes.delete = node.delete
nodes.dimensions = node.dimensions
nodes.end_of_math = node.end_of_math
nodes.flush_list = node.flush_list
nodes.flush_node = node.flush_node
nodes.free = node.free
nodes.insert_after = node.insert_after
nodes.insert_before = node.insert_before
nodes.hpack = node.hpack
nodes.new = node.new
nodes.tail = node.tail
nodes.traverse = node.traverse
nodes.traverse_id = node.traverse_id
nodes.slide = node.slide
nodes.vpack = node.vpack
nodes.first_glyph = node.first_glyph
nodes.first_character = node.first_character
nodes.has_glyph = node.has_glyph or node.first_glyph
nodes.current_attr = node.current_attr
nodes.do_ligature_n = node.do_ligature_n
nodes.has_field = node.has_field
nodes.last_node = node.last_node
nodes.usedlist = node.usedlist
nodes.protrusion_skippable = node.protrusion_skippable
nodes.write = node.write
nodes.has_attribute = node.has_attribute
nodes.set_attribute = node.set_attribute
nodes.unset_attribute = node.unset_attribute
nodes.protect_glyphs = node.protect_glyphs
nodes.unprotect_glyphs = node.unprotect_glyphs
nodes.kerning = node.kerning
nodes.ligaturing = node.ligaturing
nodes.mlist_to_hlist = node.mlist_to_hlist
-- in generic code, at least for some time, we stay nodes, while in context
-- we can go nuts (e.g. experimental); this split permits us us keep code
-- used elsewhere stable but at the same time play around in context
nodes.nuts = nodes
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