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if not modules then modules = { } end modules ['node-gmc'] = {
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 type, tostring = type, tostring
local nodes = nodes
local ligature_code = nodes.glyphcodes.ligature
local nuts = nodes.nuts
local getnext = nuts.getnext
local getsubtype = nuts.getsubtype
local copy_node = nuts.copy
local count = nuts.count
local isglyph = nuts.isglyph
local getprop = nuts.getprop
local setprop = nuts.setprop
local fastcopy = table.fastcopy
local report_error = logs.reporter("node-aux:error")
local function set_components(base,list)
local t = { }
local n = 0
while list do
local char = isglyph(list)
if char then
n = n + 1
t[n] = char
end
list = getnext(list)
end
setprop(base,"components",n > 0 and t or false)
end
local function get_components(base)
return getprop(base,"components")
end
local function copy_no_components(base)
local copy = copy_node(base)
setprop(copy,"components",false) -- no metatable lookup!
return copy
end
local function copy_only_glyphs(base)
local t = getprop(base,"components") -- also metatable
if t then
return fastcopy(t)
end
end
local function do_count(t,marks)
local n = 0
if t then
for i=1,#t do
local c = t[i]
if type(c) == "table" then
n = n + do_count(t,marks)
elseif not marks[c] then
n = n + 1
else
--marks don't count
end
end
end
return n
end
-- start is a mark and we need to keep that one
local done = false
local function count_components(base,marks)
local char = isglyph(base)
if char then
if getsubtype(base) == ligature_code then
if not done then
logs.report("fonts","!")
logs.report("fonts","! check count_components with mkiv !")
logs.report("fonts","!")
done = true
end
local t = getprop(base,"components")
if t then
return do_count(t,marks)
end
elseif not marks[char] then
return 1
end
end
return 0
end
nuts.set_components = set_components
nuts.get_components = get_components
nuts.copy_only_glyphs = copy_only_glyphs
nuts.copy_no_components = copy_no_components
nuts.count_components = count_components
nuts.setcomponents = function() report_error("unsupported: %a","setcomponents") end
nuts.getcomponents = function() report_error("unsupported: %a","getcomponents") end
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