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if not modules then modules = { } end modules ['typo-hid'] = {
version = 1.001,
comment = "companion to typo-hid.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local a_hidecontent = attributes.system("hidecontent")
local specialskips = nodes.specialskipcodes
local glue_code = nodes.nodecodes.glue
local nuts = nodes.nuts
local getattr = nuts.getattr
local getnext = nuts.getnext
local setnext = nuts.setnext
local getprev = nuts.getprev
local setlist = nuts.setlist
local setlink = nuts.setlink
local nextnode = nuts.traversers.node
local flushlist = nuts.flush_list
local dimensions = nuts.rangedimensions
local hpack = nuts.hpack
local setwhd = nuts.setwhd
local setattrlist = nuts.setattrlist
local enableaction = nodes.tasks.enableaction
function nodes.handlers.wipe(head,groupcode,line)
if getattr(line,a_hidecontent) then
flushlist(head)
setlist(line)
else
-- we have normalized lines so always some skip to start with
local b, e = nil, nil
local function wipe()
local h = hpack()
local n = getnext(e)
setwhd(h,dimensions(line,b,n))
setlink(getprev(b),h,n)
setattrlist(h,b)
setnext(b)
flushlist(b)
b = nil
e = nil
end
for n, id, subtype in nextnode, head do
if id == glue_code and specialskips[subtype] then
if b then
wipe()
end
elseif getattr(n,a_hidecontent) then
if not b then
b = n
end
e = n
elseif b then
wipe()
end
end
if b then
-- can't happen because we had a skip
wipe()
end
setlist(line,head)
end
return nil
end
interfaces.implement {
name = "enablehidecontent",
onlyonce = true,
actions = function()
enableaction("contributers","nodes.handlers.wipe")
end,
}
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