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if not modules then modules = { } end modules ['typo-wrp'] = {
version = 1.001,
comment = "companion to typo-wrp.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- begin/end par wrapping stuff ... more to come
local boundary_code = nodes.nodecodes.boundary
local wordboundary_code = nodes.boundarycodes.word
local nuts = nodes.nuts
local findtail = nuts.tail
local getprev = nuts.getprev
local setnext = nuts.setnext
local getid = nuts.getid
local getsubtype = nuts.getsubtype
local getattr = nuts.getattr
local flushnodelist = nuts.flushlist
local enableaction = nodes.tasks.enableaction
local wrappers = { }
typesetters.wrappers = wrappers
local trace_wrappers = trackers.register("typesetters.wrappers",function(v) trace_wrappers = v end)
local report = logs.reporter("paragraphs","wrappers")
-- In luametatex we don't have the parfilskip attached yet but we can have final glue
-- anyway. This check is very bound to the \crlf definition where we get:
--
-- ... boundary [strut: hlist] [break: glue penalty] boundary
local a_crlf = attributes.private("crlf")
local function remove_dangling_crlf(head,tail)
if head and tail then
if getid(tail) == boundary_code and getsubtype(tail) == wordboundary_code then
-- findnode could run backwards
if getattr(tail,a_crlf) then
local t = tail
while t do
t = getprev(t)
if not t then
break
elseif getid(t) == boundary_code and getsubtype(t) == wordboundary_code then
if t ~= head then
if trace_wrappers then
report("removing a probably unwanted end-of-par break in line %s (guess)",tex.inputlineno)
end
tail = getprev(t)
setnext(tail)
flushnodelist(t)
end
break
end
end
end
end
end
return head, tail
end
function wrappers.handler(head)
if head then
local tail = findtail(head)
head, tail = remove_dangling_crlf(head,tail) -- will be action chain
end
return head
end
interfaces.implement {
name = "enablecrlf",
onlyonce = true,
actions = function()
enableaction("processors","typesetters.wrappers.handler")
end
}
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