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if not modules then modules = { } end modules ['typo-adj'] = {
version = 1.001,
optimize = true,
comment = "companion to typo-adj.mkxl",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local nodecodes = nodes.nodecodes
local hlist_code = nodecodes.hlist
local penalty_code = nodecodes.penalty
local nuts = nodes.nuts
local getprev = nuts.getprev
local getid = nuts.getid
----- getattr = nuts.getattribute
local getdepth = nuts.getdepth
local newglue = nuts.pool.glue
local insertafter = nuts.insertafter
local texgetdimen = tex.getdimen
----- a_adjuster = attributes.system("adjuster")
local function correct_depth(head,tail)
local prev = getprev(tail)
if getid(prev) == penalty_code then -- linebreakpenalty
prev = getprev(prev)
end
if getid(prev) == hlist_code then -- line
local delta = getdepth(tail) - getdepth(prev)
if delta > 0 then
head = insertafter(head,prev,newglue(delta))
end
tex.prevdepth = getdepth(tail)
end
return head
end
local function block_baselineskip(head,tail)
-- tex.prevdepth = -1000 * 65536 -- ignoredepth
tex.prevdepth = texgetdimen("ignoredepthcriterium")
return head
end
local preactions = {
[1] = correct_depth,
[2] = block_baselineskip,
}
local postactions = {
[1] = correct_depth,
[2] = block_baselineskip,
}
-- function nodes.handlers.adjusters(head,where,tail)
-- if where == "preadjust" then
-- local a = getattr(tail,a_adjuster)
-- if a then
-- a = preactions[a]
-- if a then
-- head = a(head,tail)
-- end
-- end
-- elseif where == "postadjust" then
-- local a = getattr(tail,a_adjuster)
-- if a then
-- a = postactions[a]
-- if a then
-- head = a(head,tail)
-- end
-- end
-- else
-- -- can't happen
-- end
-- return head
-- end
function nodes.handlers.adjusters(head,where,tail,index)
if where == "preadjust" then
local a = preactions[index]
if a then
head = a(head,tail)
end
else -- if where == "postadjust" then
local a = postactions[index]
if a then
head = a(head,tail)
end
end
return head
end
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