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if not modules then modules = { } end modules ['lang-exp'] = {
version = 1.001,
comment = "companion to lang-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- This module contains snippets that were used before we expanded
-- discretionaries in the engine which makes way more sense. This
-- code is nod used any more.
if true then
return
end
-- lang-dis.lua:
local expanders -- this will go away
-- the penalty has been determined by the mode (currently we force 1):
--
-- 0 : exhyphenpenalty
-- 1 : hyphenpenalty
-- 2 : automatichyphenpenalty
--
-- following a - : the pre and post chars are already appended and set
-- so we have pre=preex and post=postex .. however, the previous
-- hyphen is already injected ... downside: the font handler sees this
-- so this is another argument for doing a hyphenation pass in context
if LUATEXVERSION < 1.005 then -- not loaded any more
expanders = {
[discretionary_code] = function(d,template)
-- \discretionary
return template
end,
[explicit_code] = function(d,template)
-- \-
local pre, post, replace = getdisc(d)
local done = false
if pre then
local char = isglyph(pre)
if char and char <= 0 then
done = true
flush_list(pre)
pre = nil
end
end
if post then
local char = isglyph(post)
if char and char <= 0 then
done = true
flush_list(post)
post = nil
end
end
if done then
-- todo: take existing penalty
setdisc(d,pre,post,replace,explicit_code,tex.exhyphenpenalty)
else
setsubtype(d,explicit_code)
end
return template
end,
[automatic_code] = function(d,template)
local pre, post, replace = getdisc(d)
if pre then
-- we have a preex characters and want that one to replace the
-- character in front which is the trigger
if not template then
-- can there be font kerns already?
template = getprev(d)
if template and getid(template) ~= glyph_code then
template = getnext(d)
if template and getid(template) ~= glyph_code then
template = nil
end
end
end
if template then
local pseudohead = getprev(template)
if pseudohead then
while template ~= d do
pseudohead, template, removed = remove_node(pseudohead,template)
-- free old replace ?
replace = removed
-- break ?
end
else
-- can't happen
end
setdisc(d,pre,post,replace,automatic_code,tex.hyphenpenalty)
else
-- print("lone regular discretionary ignored")
end
else
setdisc(d,pre,post,replace,automatic_code,tex.hyphenpenalty)
end
return template
end,
[regular_code] = function(d,template)
if check_regular then
-- simple
if not template then
-- can there be font kerns already?
template = getprev(d)
if template and getid(template) ~= glyph_code then
template = getnext(d)
if template and getid(template) ~= glyph_code then
template = nil
end
end
end
if template then
local language = template and getlang(template)
local data = getlanguagedata(language)
local prechar = data.prehyphenchar
local postchar = data.posthyphenchar
local pre, post, replace = getdisc(d) -- pre can be set
local done = false
if prechar and prechar > 0 then
done = true
pre = copy_node(template)
setchar(pre,prechar)
end
if postchar and postchar > 0 then
done = true
post = copy_node(template)
setchar(post,postchar)
end
if done then
setdisc(d,pre,post,replace,regular_code,tex.hyphenpenalty)
end
else
-- print("lone regular discretionary ignored")
end
return template
end
end,
[disccodes.first] = function()
-- forget about them
end,
[disccodes.second] = function()
-- forget about them
end,
}
function languages.expand(d,template,subtype)
if not subtype then
subtype = getsubtype(d)
end
if subtype ~= discretionary_code then
return expanders[subtype](d,template)
end
end
else
function languages.expand()
-- nothing to be fixed
end
end
languages.expanders = expanders
-- lang-hyp.lua:
----- expanders = languages.expanders -- gone in 1.005
----- expand_explicit = expanders and expanders[explicit_code]
----- expand_automatic = expanders and expanders[automatic_code]
if LUATEXVERSION < 1.005 then -- not loaded any more
expanded = function(head)
local done = hyphenate(head)
if done then
for d in traverse_id(disc_code,tonut(head)) do
local s = getsubtype(d)
if s ~= discretionary_code then
expanders[s](d,template)
done = true
end
end
end
return head, done
end
end
-- if id == disc_code then
-- if expanded then
-- -- pre 1.005
-- local subtype = getsubtype(current)
-- if subtype == discretionary_code then -- \discretionary
-- size = 0
-- elseif subtype == explicit_code then -- \- => only here
-- -- automatic (-) : the old parser makes negative char entries
-- size = 0
-- expand_explicit(current)
-- elseif subtype == automatic_code then -- - => only here
-- -- automatic (-) : the old hyphenator turns an exhyphen into glyph+disc
-- size = 0
-- expand_automatic(current)
-- else
-- -- first : done by the hyphenator
-- -- second : done by the hyphenator
-- -- regular : done by the hyphenator
-- size = 0
-- end
-- else
-- size = 0
-- end
-- current = getnext(current)
-- if hyphenonly then
-- skipping = true
-- end
|
