[*] reorganize src/ subtree

This moves the fontloader files into a separate subdirectory to simplify
maintainance.

1 files changed, 178 insertions, 0 deletions

diff --git a/src/fontloader/luaotfload-basics-nod.lua b/src/fontloader/luaotfload-basics-nod.lua
new file mode 100644
index 0000000..373dab5
--- /dev/null
+++ b/src/fontloader/luaotfload-basics-nod.lua
@@ -0,0 +1,178 @@
+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