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if not modules then modules = { } end modules ['node-acc'] = {
version = 1.001,
comment = "companion to node-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local nodes, node = nodes, node
local nodecodes = nodes.nodecodes
local tasks = nodes.tasks
local traverse_nodes = node.traverse
local traverse_id = node.traverse_id
local has_attribute = node.has_attribute
local set_attribute = node.set_attribute
local copy_node = node.copy
local free_nodelist = node.flush_list
local glue_code = nodecodes.glue
local glyph_code = nodecodes.glyph
local hlist_code = nodecodes.hlist
local vlist_code = nodecodes.vlist
local a_characters = attributes.private("characters")
-- todo: nbsp etc
local function injectspaces(head)
local p
for n in traverse_nodes(head) do
local id = n.id
if id == glue_code then -- todo: check for subtype related to spacing (13/14 but most seems to be 0)
-- local at = has_attribute(n,attribute)
-- if at then
--~ local a = has_attribute(n,a_characters)
--~ if a then
--~ -- handle this in the export
--~ else
if p and p.id == glyph_code then
local g = copy_node(p)
local c = g.components
if c then -- it happens that we copied a ligature
free_nodelist(c)
g.components = nil
g.subtype = 256
end
local a = has_attribute(n,a_characters)
local s = copy_node(n.spec)
g.char, n.spec = 32, s
p.next, g.prev = g, p
g.next, n.prev = n, g
s.width = s.width - g.width
if a then
set_attribute(g,a_characters,a)
end
set_attribute(s,a_characters,0)
set_attribute(n,a_characters,0)
end
-- end
--~ end
elseif id == hlist_code or id == vlist_code then
injectspaces(n.list,attribute)
end
p = n
end
return head, true
end
nodes.handlers.accessibility = injectspaces
-- todo:
--~ local a_hyphenated = attributes.private('hyphenated')
--~
--~ local hyphenated, codes = { }, { }
--~
--~ local function compact(n)
--~ local t = { }
--~ for n in traverse_id(glyph_code,n) do
--~ t[#t+1] = utfchar(n.char) -- check for unicode
--~ end
--~ return concat(t,"")
--~ end
--~
--~ local function injectspans(head)
--~ for n in traverse_nodes(head) do
--~ local id = n.id
--~ if id == disc then
--~ local r, p = n.replace, n.pre
--~ if r and p then
--~ local str = compact(r)
--~ local hsh = hyphenated[str]
--~ if not hsh then
--~ hsh = #codes + 1
--~ hyphenated[str] = hsh
--~ codes[hsh] = str
--~ end
--~ set_attribute(n,a_hyphenated,hsh)
--~ end
--~ elseif id == hlist_code or id == vlist_code then
--~ injectspans(n.list)
--~ end
--~ end
--~ return head, true
--~ end
--~
--~ nodes.injectspans = injectspans
--~
--~ tasks.appendaction("processors", "words", "nodes.injectspans")
--~
--~ local function injectspans(head)
--~ for n in traverse_nodes(head) do
--~ local id = n.id
--~ if id == disc then
--~ local a = has_attribute(n,a_hyphenated)
--~ if a then
--~ local str = codes[a]
--~ local b = new_pdfliteral(format("/Span << /ActualText %s >> BDC", lpdf.tosixteen(str)))
--~ local e = new_pdfliteral("EMC")
--~ node.insert_before(head,n,b)
--~ node.insert_after(head,n,e)
--~ end
--~ elseif id == hlist_code or id == vlist_code then
--~ injectspans(n.list)
--~ end
--~ end
--~ end
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