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if not modules then modules = { } end modules ['s-languages-hyphenation'] = {
version = 1.001,
comment = "companion to s-languages-hyphenation.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
moduledata.languages = moduledata.languages or { }
moduledata.languages.hyphenation = moduledata.languages.hyphenation or { }
local a_colormodel = attributes.private('colormodel')
local tex = tex
local context = context
local nodecodes = nodes.nodecodes
local nuts = nodes.nuts
local nodepool = nuts.pool
local disc_code = nodecodes.disc
local glyph_code = nodecodes.glyph
local emwidths = fonts.hashes.emwidths
local exheights = fonts.hashes.exheights
local newkern = nodepool.kern
local newrule = nodepool.rule
local newglue = nodepool.glue
local insert_node_after = nuts.insert_after
local traverse_by_id = nuts.traverse_id
local tonut = nodes.tonut
local tonode = nodes.tonode
local getid = nuts.getid
local getnext = nuts.getnext
local getdisc = nuts.getdisc
local getattr = nuts.getattr
local getfont = nuts.getfont
local getfield = nuts.getfield
local setlink = nuts.setlink
local setdisc = nuts.setdisc
local setfield = nuts.setfield
local free_node = nuts.free
local tracers = nodes.tracers
local colortracers = tracers and tracers.colors
local setnodecolor = colortracers.set
-- maybe this will become code code
local states = table.setmetatableindex(function(t,k)
return {
lefthyphenmin = tex.lefthyphenmin,
righthyphenmin = tex.righthyphenmin,
hyphenationmin = tex.hyphenationmin,
prehyphenchar = tex.prehyphenchar,
posthyphenchar = tex.posthyphenchar,
}
end)
interfaces.implement {
name = "storelanguagestate",
actions = function()
states[tex.language] = {
lefthyphenmin = tex.lefthyphenmin,
righthyphenmin = tex.righthyphenmin,
hyphenationmin = tex.hyphenationmin,
prehyphenchar = tex.prehyphenchar,
posthyphenchar = tex.posthyphenchar,
}
end
}
function moduledata.languages.getstate(l)
return states[l] -- code
end
-- end
local function identify(head,marked)
local current = tonut(head)
local prev = nil
while current do
local id = getid(current)
local next = getnext(current)
if id == disc_code then
if prev and next then -- asume glyphs
marked[#marked+1] = prev
local pre, post, replace, pre_tail, post_tail, replace_tail = getdisc(current,true)
if replace then
setlink(prev,replace)
setlink(replace_tail,next)
setdisc(pre,post,nil)
prev = tail
else
setlink(prev,next)
end
free_node(current)
end
elseif id == glyph_code then
prev = current
else
prev = nil
end
current = next
end
end
local function mark(head,marked,w,h,d,how)
head = tonut(head)
for i=1,#marked do
local current = marked[i]
local font = getfont(current)
local em = emwidths[font]
local ex = exheights[font]
local width = w*em
local rule = newrule(width,h*ex,d*ex)
head, current = insert_node_after(head,current,newkern(-width/2))
head, current = insert_node_after(head,current,rule)
head, current = insert_node_after(head,current,newkern(-width/2))
head, current = insert_node_after(head,current,newglue(0))
setnodecolor(rule,how) -- ,getattr(current,a_colormodel))
end
end
local function getlanguage(head,l,left,right)
local t = { }
for n in traverse_by_id(glyph_code,tonut(head)) do
t[n] = {
getfield(n,"lang"),
getfield(n,"left"),
getfield(n,"right"),
}
end
end
local langs = { }
local tags = { }
local noflanguages = 0
local colorbytag = false
function moduledata.languages.hyphenation.showhyphens(head)
if noflanguages > 0 then
local marked = { }
local cached = { }
-- somehow assigning -1 fails
for n in traverse_by_id(glyph_code,tonut(head)) do
cached[n] = {
getfield(n,"lang"),
getfield(n,"left"),
getfield(n,"right")
}
end
for i=1,noflanguages do
local m = { }
local l = langs[i]
local s = states[l]
marked[i] = m
local lmin = s.lefthyphenmin
local rmin = s.righthyphenmin
for n in next, cached do
setfield(n,"lang",l)
setfield(n,"left",lmin)
setfield(n,"right",rmin)
end
languages.hyphenators.methods.original(head)
identify(head,m)
end
for i=noflanguages,1,-1 do
local l = noflanguages - i + 1
mark(head,marked[i],1/16,l/2,l/4,"hyphenation:"..(colorbytag and tags[i] or i))
end
for n, d in next, cached do
setfield(n,"lang",d[1])
setfield(n,"left",d[2])
setfield(n,"right",d[3])
end
return head, true
else
return head, false
end
end
function moduledata.languages.hyphenation.startcomparepatterns(list)
if list and list ~= "" then
tags = utilities.parsers.settings_to_array(list)
end
noflanguages = #tags
context.begingroup()
for i=1,noflanguages do
langs[i] = tags[i] and languages.getnumber(tags[i])
context.language{tags[i]}
end
context.endgroup()
nodes.tasks.enableaction("processors","moduledata.languages.hyphenation.showhyphens")
end
function moduledata.languages.hyphenation.stopcomparepatterns()
noflanguages = 0
nodes.tasks.disableaction("processors","moduledata.languages.hyphenation.showhyphens")
end
function moduledata.languages.hyphenation.showcomparelegend(list)
if list and list ~= "" then
tags = utilities.parsers.settings_to_array(list)
end
for i=1,#tags do
if i > 1 then
context.enspace()
end
context.color( { "hyphenation:"..(colorbytag and tags[i] or i) }, tags[i])
end
end
nodes.tasks.appendaction("processors","before","moduledata.languages.hyphenation.showhyphens")
nodes.tasks.disableaction("processors","moduledata.languages.hyphenation.showhyphens")
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