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if not modules then modules = { } end modules ['supp-box'] = {
version = 1.001,
comment = "companion to supp-box.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- this is preliminary code, use insert_before etc
local report_hyphenation = logs.reporter("languages","hyphenation")
local tex = tex
local context = context
local commands = commands
local nodes = nodes
local splitstring = string.split
local nodecodes = nodes.nodecodes
local disc_code = nodecodes.disc
local hlist_code = nodecodes.hlist
local vlist_code = nodecodes.vlist
local glue_code = nodecodes.glue
local kern_code = nodecodes.kern
local glyph_code = nodecodes.glyph
local new_penalty = nodes.pool.penalty
local new_hlist = nodes.pool.hlist
local new_glue = nodes.pool.glue
local free_node = nodes.free
local copy_list = nodes.copy_list
local copy_node = nodes.copy
local find_tail = nodes.tail
local texsetbox = tex.setbox
local texgetbox = tex.getbox
local texget = tex.get
local function hyphenatedlist(list)
while list do
local id, next, prev = list.id, list.next, list.prev
if id == disc_code then
local hyphen = list.pre
if hyphen then
local penalty = new_penalty(-500)
hyphen.next, penalty.prev = penalty, hyphen
prev.next, next.prev = hyphen, penalty
penalty.next, hyphen.prev = next, prev
list.pre = nil
free_node(list)
end
elseif id == vlist_code or id == hlist_code then
hyphenatedlist(list.list)
end
list = next
end
end
commands.hyphenatedlist = hyphenatedlist
function commands.showhyphenatedinlist(list)
report_hyphenation("show: %s",nodes.listtoutf(list,false,true))
end
local function checkedlist(list)
if type(list) == "number" then
return texgetbox(list).list
else
return list
end
end
local function applytochars(list,what,nested)
local doaction = context[what or "ruledhbox"]
local noaction = context
local current = checkedlist(list)
while current do
local id = current.id
if nested and (id == hlist_code or id == vlist_code) then
context.beginhbox()
applytochars(current.list,what,nested)
context.endhbox()
elseif id ~= glyph_code then
noaction(copy_node(current))
else
doaction(copy_node(current))
end
current = current.next
end
end
local function applytowords(list,what,nested)
local doaction = context[what or "ruledhbox"]
local noaction = context
local current = checkedlist(list)
local start
while current do
local id = current.id
if id == glue_code then
if start then
doaction(copy_list(start,current))
start = nil
end
noaction(copy_node(current))
elseif nested and (id == hlist_code or id == vlist_code) then
context.beginhbox()
applytowords(current.list,what,nested)
context.egroup()
elseif not start then
start = current
end
current = current.next
end
if start then
doaction(copy_list(start))
end
end
commands.applytochars = applytochars
commands.applytowords = applytowords
local split_char = lpeg.Ct(lpeg.C(1)^0)
local split_word = lpeg.tsplitat(lpeg.patterns.space)
local split_line = lpeg.tsplitat(lpeg.patterns.eol)
function commands.processsplit(str,command,how,spaced)
how = how or "word"
if how == "char" then
local words = lpeg.match(split_char,str)
for i=1,#words do
local word = words[i]
if word == " " then
if spaced then
context.space()
end
elseif command then
context[command](word)
else
context(word)
end
end
elseif how == "word" then
local words = lpeg.match(split_word,str)
for i=1,#words do
local word = words[i]
if spaced and i > 1 then
context.space()
end
if command then
context[command](word)
else
context(word)
end
end
elseif how == "line" then
local words = lpeg.match(split_line,str)
for i=1,#words do
local word = words[i]
if spaced and i > 1 then
context.par()
end
if command then
context[command](word)
else
context(word)
end
end
else
context(str)
end
end
local a_vboxtohboxseparator = attributes.private("vboxtohboxseparator")
function commands.vboxlisttohbox(original,target,inbetween)
local current = texgetbox(original).list
local head = nil
local tail = nil
while current do
local id = current.id
local next = current.next
if id == hlist_code then
local list = current.list
if head then
if inbetween > 0 then
local n = new_glue(0,0,inbetween)
tail.next = n
n.prev = tail
tail = n
end
tail.next = list
list.prev = tail
else
head = list
end
tail = find_tail(list)
-- remove last separator
if tail.id == hlist_code and tail[a_vboxtohboxseparator] == 1 then
local temp = tail
local prev = tail.prev
if next then
local list = tail.list
prev.next = list
list.prev = prev
tail.list = nil
tail = find_tail(list)
else
tail = prev
end
free_node(temp)
end
-- done
tail.next = nil
current.list = nil
end
current = next
end
local result = new_hlist()
result.list = head
texsetbox(target,result)
end
function commands.hboxtovbox(original)
local b = texgetbox(original)
local factor = texget("baselineskip").width / texget("hsize")
b.depth = 0
b.height = b.width * factor
end
function commands.boxtostring(n)
context.puretext(nodes.toutf(tex.box[n].list)) -- helper is defined later
end
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