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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 nuts = nodes.nuts
local tonut = nuts.tonut
local tonode = nuts.tonode
local getfield = nuts.getfield
local getnext = nuts.getnext
local getprev = nuts.getprev
local getid = nuts.getid
local getlist = nuts.getlist
local getattribute = nuts.getattribute
local getbox = nuts.getbox
local setfield = nuts.setfield
local setbox = nuts.setbox
local free_node = nuts.free
local copy_list = nuts.copy_list
local copy_node = nuts.copy
local find_tail = nuts.tail
local listtoutf = nodes.listtoutf
local nodepool = nuts.pool
local new_penalty = nodepool.penalty
local new_hlist = nodepool.hlist
local new_glue = nodepool.glue
local texget = tex.get
local function hyphenatedlist(head)
local current = head and tonut(head)
while current do
local id = getid(current)
local next = getnext(current)
local prev = getprev(current)
if id == disc_code then
local hyphen = getfield(current,"pre")
if hyphen then
local penalty = new_penalty(-500)
-- insert_after etc
setfield(hyphen,"next",penalty)
setfield(penalty,"prev",hyphen)
setfield(prev,"next",hyphen)
setfield(next,"prev", penalty)
setfield(penalty,"next",next)
setfield(hyphen,"prev",prev)
setfield(current,"pre",nil)
free_node(current)
end
elseif id == vlist_code or id == hlist_code then
hyphenatedlist(getlist(current))
end
current = next
end
end
commands.hyphenatedlist = hyphenatedlist
function commands.showhyphenatedinlist(list)
report_hyphenation("show: %s",listtoutf(tonut(list),false,true))
end
local function checkedlist(list)
if type(list) == "number" then
return getlist(getbox(tonut(list)))
else
return tonut(list)
end
end
local function applytochars(current,doaction,noaction,nested)
while current do
local id = getid(current)
if nested and (id == hlist_code or id == vlist_code) then
context.beginhbox()
applytochars(getlist(current),what,nested)
context.endhbox()
elseif id ~= glyph_code then
noaction(tonode(copy_node(current)))
else
doaction(tonode(copy_node(current)))
end
current = getnext(current)
end
end
local function applytowords(current,doaction,noaction,nested)
local start
while current do
local id = getid(current)
if id == glue_code then
if start then
doaction(tonode(copy_list(start,current)))
start = nil
end
noaction(tonode(copy_node(current)))
elseif nested and (id == hlist_code or id == vlist_code) then
context.beginhbox()
applytowords(getlist(current),what,nested)
context.egroup()
elseif not start then
start = current
end
current = getnext(current)
end
if start then
doaction(tonode(copy_list(start)))
end
end
commands.applytochars = function(list,what,nested) applytochars(checkedlist(list),context[what or "ruledhbox"],context,nested) end
commands.applytowords = function(list,what,nested) applytowords(checkedlist(list),context[what or "ruledhbox"],context,nested) end
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 = getlist(getbox(original))
local head = nil
local tail = nil
while current do
local id = getid(current)
local next = getnext(current)
if id == hlist_code then
local list = getlist(current)
if head then
if inbetween > 0 then
local n = new_glue(0,0,inbetween)
setfield(tail,"next",n)
setfield(n,"prev",tail)
tail = n
end
setfield(tail,"next",list)
setfield(list,"prev",tail)
else
head = list
end
tail = find_tail(list)
-- remove last separator
if getid(tail) == hlist_code and getattribute(tail,a_vboxtohboxseparator) == 1 then
local temp = tail
local prev = getprev(tail)
if next then
local list = getlist(tail)
setfield(prev,"next",list)
setfield(list,"prev",prev)
setfield(tail,"list",nil)
tail = find_tail(list)
else
tail = prev
end
free_node(temp)
end
-- done
setfield(tail,"next",nil)
setfield(current,"list",nil)
end
current = next
end
local result = new_hlist()
setfield(result,"list",head)
setbox(target,result)
end
function commands.hboxtovbox(original)
local b = getbox(original)
local factor = texget("baselineskip").width / texget("hsize")
setfield(b,"depth",0)
setfield(b,"height",getfield(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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