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-rw-r--r--otfl-basics-nod.lua95
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diff --git a/otfl-basics-nod.lua b/otfl-basics-nod.lua
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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.unsetvalue = -0x7FFFFFFF
+
+local numbers, last = { }, 127
+
+function attributes.private(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" }
+
+nodes.nodecodes = nodecodes
+nodes.whatcodes = whatcodes
+nodes.whatsitcodes = whatcodes
+nodes.glyphcodes = glyphcodes
+
+local free_node = node.free
+local remove_node = node.remove
+local new_node = node.new
+
+nodes.handlers.protectglyphs = node.protect_glyphs
+nodes.handlers.unprotectglyphs = node.unprotect_glyphs
+
+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
+
+nodes.before = node.insert_before
+nodes.after = node.insert_after
+
+function nodes.pool.kern(k)
+ local n = new_node("kern",1)
+ n.kern = k
+ return n
+end