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if not modules then modules = { } end modules ['typo-cln'] = {
version = 1.001,
comment = "companion to typo-cln.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- This quick and dirty hack took less time than listening to a CD (In
-- this case Dream Theaters' Octavium. Of course extensions will take
-- more time.
local utfbyte = utf.byte
local trace_cleaners = false trackers.register("typesetters.cleaners", function(v) trace_cleaners = v end)
local trace_autocase = false trackers.register("typesetters.cleaners.autocase",function(v) trace_autocase = v end)
local report_cleaners = logs.reporter("nodes","cleaners")
local report_autocase = logs.reporter("nodes","autocase")
typesetters.cleaners = typesetters.cleaners or { }
local cleaners = typesetters.cleaners
local variables = interfaces.variables
local nodecodes = nodes.nodecodes
local tasks = nodes.tasks
local texattribute = tex.attribute
local traverse_id = node.traverse_id
local unsetvalue = attributes.unsetvalue
local glyph_code = nodecodes.glyph
local uccodes = characters.uccodes
local a_cleaner = attributes.private("cleaner")
local resetter = { -- this will become an entry in char-def
[utfbyte(".")] = true
}
-- Contrary to the casing code we need to keep track of a state.
-- We could extend the casing code with a status tracker but on
-- the other hand we might want to apply casing afterwards. So,
-- cleaning comes first.
local function process(namespace,attribute,head)
local inline, done = false, false
for n in traverse_id(glyph_code,head) do
local char = n.char
if resetter[char] then
inline = false
elseif not inline then
local a = n[attribute]
if a == 1 then -- currently only one cleaner so no need to be fancy
local upper = uccodes[char]
if type(upper) == "table" then
-- some day, not much change that \SS ends up here
else
n.char = upper
done = true
if trace_autocase then
report_autocase("")
end
end
end
inline = true
end
end
return head, done
end
-- see typo-cap for a more advanced settings handler .. not needed now
local enabled = false
function cleaners.set(n)
if n == variables.reset or not tonumber(n) or n == 0 then
texattribute[a_cleaner] = unsetvalue
else
if not enabled then
tasks.enableaction("processors","typesetters.cleaners.handler")
if trace_cleaners then
report_cleaners("enabling cleaners")
end
enabled = true
end
texattribute[a_cleaner] = n
end
end
cleaners.handler = nodes.installattributehandler {
name = "cleaner",
namespace = cleaners,
processor = process,
}
-- interface
commands.setcharactercleaning = cleaners.set
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