1 files changed, 95 insertions, 0 deletions
diff --git a/luaotfload-basics-nod.lua b/luaotfload-basics-nod.lua
new file mode 100644
index 0000000..151d98a
--- /dev/null
+++ b/luaotfload-basics-nod.lua
@@ -0,0 +1,95 @@
+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