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if not modules then modules = { } end modules ['luatex-fonts-cbk'] = {
version = 1.001,
comment = "companion to luatex-*.tex",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
if context then
texio.write_nl("fatal error: this module is not for context")
os.exit()
end
local fonts = fonts
local nodes = nodes
-- Fonts: (might move to node-gef.lua)
local traverse_id = node.traverse_id
local free_node = node.free
local remove_node = node.remove
local glyph_code = nodes.nodecodes.glyph
local disc_code = nodes.nodecodes.disc
-- from now on we apply ligaturing and kerning here because it might interfere with complex
-- opentype discretionary handling where the base ligature pass expect some weird extra
-- pointers (which then confuse the tail slider that has some checking built in)
local ligaturing = node.ligaturing
local kerning = node.kerning
local basepass = true
local function l_warning() texio.write_nl("warning: node.ligaturing called directly") l_warning = nil end
local function k_warning() texio.write_nl("warning: node.kerning called directly") k_warning = nil end
function node.ligaturing(...)
if basepass and l_warning then
l_warning()
end
return ligaturing(...)
end
function node.kerning(...)
if basepass and k_warning then
k_warning()
end
return kerning(...)
end
function nodes.handlers.setbasepass(v)
basepass = v
end
function nodes.handlers.nodepass(head)
local fontdata = fonts.hashes.identifiers
if fontdata then
local usedfonts = { }
local basefonts = { }
local prevfont = nil
local basefont = nil
local variants = nil
local redundant = nil
for n in traverse_id(glyph_code,head) do
local font = n.font
if font ~= prevfont then
if basefont then
basefont[2] = n.prev
end
prevfont = font
local used = usedfonts[font]
if not used then
local tfmdata = fontdata[font] --
if tfmdata then
local shared = tfmdata.shared -- we need to check shared, only when same features
if shared then
local processors = shared.processes
if processors and #processors > 0 then
usedfonts[font] = processors
elseif basepass then
basefont = { n, nil }
basefonts[#basefonts+1] = basefont
end
end
local resources = tfmdata.resources
variants = resources and resources.variants
variants = variants and next(variants) and variants or false
end
else
local tfmdata = fontdata[prevfont]
if tfmdata then
local resources = tfmdata.resources
variants = resources and resources.variants
variants = variants and next(variants) and variants or false
end
end
end
if variants then
local char = n.char
if char >= 0xFE00 and (char <= 0xFE0F or (char >= 0xE0100 and char <= 0xE01EF)) then
local hash = variants[char]
if hash then
local p = n.prev
if p and p.id == glyph_code then
local variant = hash[p.char]
if variant then
p.char = variant
if not redundant then
redundant = { n }
else
redundant[#redundant+1] = n
end
end
end
end
end
end
end
if redundant then
for i=1,#redundant do
local n = redundant[i]
remove_node(head,n)
free_node(n)
end
end
for d in traverse_id(disc_code,head) do
local r = d.replace
if r then
for n in traverse_id(glyph_code,r) do
local font = n.font
if font ~= prevfont then
prevfont = font
local used = usedfonts[font]
if not used then
local tfmdata = fontdata[font] --
if tfmdata then
local shared = tfmdata.shared -- we need to check shared, only when same features
if shared then
local processors = shared.processes
if processors and #processors > 0 then
usedfonts[font] = processors
end
end
end
end
end
end
end
end
if next(usedfonts) then
for font, processors in next, usedfonts do
for i=1,#processors do
head = processors[i](head,font,0) or head
end
end
end
if basepass and #basefonts > 0 then
for i=1,#basefonts do
local range = basefonts[i]
local start = range[1]
local stop = range[2]
-- maybe even: if start and start ~= stop then
if start or stop then
local prev = nil
local next = nil
local front = start == head
if stop then
next = stop.next
start, stop = ligaturing(start,stop)
start, stop = kerning(start,stop)
elseif start then
prev = start.prev
start = ligaturing(start)
start = kerning(start)
end
if prev then
start.prev = prev
prev.next = start
end
if next then
stop.next = next
next.prev = stop
end
if front then
head = start
end
end
end
end
return head, true
else
return head, false
end
end
function nodes.handlers.basepass(head)
if basepass then
head = ligaturing(head)
head = kerning(head)
end
return head, true
end
local nodepass = nodes.handlers.nodepass
local basepass = nodes.handlers.basepass
local injectpass = nodes.injections.handler
local protectpass = nodes.handlers.protectglyphs
function nodes.simple_font_handler(head)
if head then
head = nodepass(head)
head = injectpass(head)
head = basepass(head)
protectpass(head)
return head, true
else
return head, false
end
end
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