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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 nodecodes = nodes.nodecodes
local nodepool = nodes.pool
local disc = nodecodes.disc
local glyph = 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 = node.insert_after
local traverse_by_id = node.traverse_id
local hyphenate = lang.hyphenate
local find_tail = node.tail
local remove_node = nodes.remove
local tracers = nodes.tracers
local colortracers = tracers and tracers.colors
local setnodecolor = colortracers.set
local function identify(head,marked)
local current, prev = head, nil
while current do
local id = current.id
local next = current.next
if id == disc then
if prev and next.id == glyph then -- catch other usage of disc
marked[#marked+1] = prev
end
elseif id == glyph then
prev = current
end
current = next
end
end
local function strip(head,marked)
for i=1,#marked do
local prev = marked[i]
remove_node(head,prev.next,true)
end
end
local function mark(head,marked,w,h,d,how)
for i=1,#marked do
local prev = marked[i]
local font = prev.font
local em = emwidths[font]
local ex = exheights[font]
local width = w*em
local rule = newrule(width,h*ex,d*ex)
head, prev = insert_node_after(head,prev,newkern(-width/2))
head, prev = insert_node_after(head,prev,rule)
head, prev = insert_node_after(head,prev,newkern(-width/2))
head, prev = insert_node_after(head,prev,newglue(0))
setnodecolor(rule,how,prev[a_colormodel])
end
end
local langs, tags, noflanguages = { }, { }, 0
local colorbytag = false
function moduledata.languages.hyphenation.showhyphens(head)
if noflanguages > 0 then
local marked = { }
for i=1,noflanguages do
local m = { }
local l = langs[i]
marked[i] = m
for n in traverse_by_id(glyph,head) do
n.lang = l
end
hyphenate(head,find_tail(head))
identify(head,m)
strip(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
return head, true
else
return head, false
end
end
local savedlanguage
function moduledata.languages.hyphenation.startcomparepatterns(list)
if list and list ~= "" then
tags = utilities.parsers.settings_to_array(list)
end
savedlanguage = tex.language
tex.language = 0
noflanguages = #tags
for i=1,noflanguages do
langs[i] = tags[i] and languages.getnumber(tags[i])
end
nodes.tasks.enableaction("processors","moduledata.languages.hyphenation.showhyphens")
end
function moduledata.languages.hyphenation.stopcomparepatterns()
noflanguages = 0
tex.language = savedlanguage or tex.language
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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