| Current File : //usr/share/texlive/texmf-dist/tex/luatex/luaotfload/fontloader-basics-nod.lua |
if not modules then modules = { } end modules ['luatex-fonts-nod'] = {
version = 1.001,
comment = "companion to luatex-fonts.lua",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
if context then
os.exit()
end
-- Don't depend on code here as it is only needed to complement the font handler
-- code. I will move some to another namespace as I don't see other macro packages
-- use the context logic. It's a subset anyway. More will be stripped.
-- Attributes:
if tex.attribute[0] ~= 0 then
texio.write_nl("log","!")
texio.write_nl("log","! Attribute 0 is reserved for ConTeXt's font feature management and has to be")
texio.write_nl("log","! set to zero. Also, some attributes in the range 1-255 are used for special")
texio.write_nl("log","! purposes so setting them at the TeX end might break the font handler.")
texio.write_nl("log","!")
tex.attribute[0] = 0 -- else no features
end
attributes = attributes or { }
attributes.unsetvalue = -0x7FFFFFFF
local numbers, last = { }, 127
attributes.private = attributes.private or function(name)
local number = numbers[name]
if not number then
if last < 255 then
last = last + 1
end
number = last
numbers[name] = number
end
return number
end
-- Nodes (a subset of context so that we don't get too much unused code):
nodes = { }
nodes.handlers = { }
local nodecodes = { }
local glyphcodes = node.subtypes("glyph")
local disccodes = node.subtypes("disc")
for k, v in next, node.types() do
v = string.gsub(v,"_","")
nodecodes[k] = v
nodecodes[v] = k
end
for k, v in next, glyphcodes do
glyphcodes[v] = k
end
for k, v in next, disccodes do
disccodes[v] = k
end
nodes.nodecodes = nodecodes
nodes.glyphcodes = glyphcodes
nodes.disccodes = disccodes
nodes.dirvalues = { lefttoright = 0, righttoleft = 1 }
nodes.handlers.protectglyphs = node.protect_glyphs -- beware: nodes!
nodes.handlers.unprotectglyphs = node.unprotect_glyphs -- beware: nodes!
-- in generic code, at least for some time, we stay nodes, while in context
-- we can go nuts (e.g. experimental); this split permits us us keep code
-- used elsewhere stable but at the same time play around in context
-- much of this will go away .. it's part of the context interface and not
-- officially in luatex-*.lua
local direct = node.direct
local nuts = { }
nodes.nuts = nuts
local tonode = direct.tonode
local tonut = direct.todirect
nodes.tonode = tonode
nodes.tonut = tonut
nuts.tonode = tonode
nuts.tonut = tonut
nuts.getattr = direct.get_attribute
nuts.getboth = direct.getboth
nuts.getchar = direct.getchar
nuts.getdirection = direct.getdirection
nuts.getdisc = direct.getdisc
nuts.getreplace = direct.getreplace
nuts.getfield = direct.getfield
nuts.getfont = direct.getfont
nuts.getid = direct.getid
nuts.getkern = direct.getkern
nuts.getlist = direct.getlist
nuts.getnext = direct.getnext
nuts.getoffsets = direct.getoffsets
nuts.getoptions = direct.getoptions or function() return 0 end
nuts.getprev = direct.getprev
nuts.getsubtype = direct.getsubtype
nuts.getwidth = direct.getwidth
nuts.setattr = direct.setfield
nuts.setboth = direct.setboth
nuts.setchar = direct.setchar
nuts.setcomponents = direct.setcomponents
nuts.setdirection = direct.setdirection
nuts.setdisc = direct.setdisc
nuts.setreplace = direct.setreplace
nuts.setfield = setfield
nuts.setkern = direct.setkern
nuts.setlink = direct.setlink
nuts.setlist = direct.setlist
nuts.setnext = direct.setnext
nuts.setoffsets = direct.setoffsets
nuts.setprev = direct.setprev
nuts.setsplit = direct.setsplit
nuts.setsubtype = direct.setsubtype
nuts.setwidth = direct.setwidth
nuts.getglyphdata = nuts.getattr
nuts.setglyphdata = nuts.setattr
nuts.ischar = direct.is_char
nuts.isglyph = direct.is_glyph
nuts.copy = direct.copy
nuts.copy_list = direct.copy_list
nuts.copy_node = direct.copy
nuts.end_of_math = direct.end_of_math
nuts.flush = direct.flush
nuts.flush_list = direct.flush_list
nuts.flush_node = direct.flush_node
nuts.free = direct.free
nuts.insert_after = direct.insert_after
nuts.insert_before = direct.insert_before
nuts.is_node = direct.is_node
nuts.kerning = direct.kerning
nuts.ligaturing = direct.ligaturing
nuts.new = direct.new
nuts.remove = direct.remove
nuts.tail = direct.tail
nuts.traverse = direct.traverse
nuts.traverse_char = direct.traverse_char
nuts.traverse_glyph = direct.traverse_glyph
nuts.traverse_id = direct.traverse_id
-- properties as used in the (new) injector:
local propertydata = direct.get_properties_table()
nodes.properties = { data = propertydata }
if direct.set_properties_mode then
direct.set_properties_mode(true,true)
function direct.set_properties_mode() end
end
nuts.getprop = function(n,k)
local p = propertydata[n]
if p then
return p[k]
end
end
nuts.setprop = function(n,k,v)
if v then
local p = propertydata[n]
if p then
p[k] = v
else
propertydata[n] = { [k] = v }
end
end
end
nodes.setprop = nodes.setproperty
nodes.getprop = nodes.getproperty
-- a few helpers (we need to keep 'm in sync with context) .. some day components
-- might go so here we isolate them
local setprev = nuts.setprev
local setnext = nuts.setnext
local getnext = nuts.getnext
local setlink = nuts.setlink
local getfield = nuts.getfield
local setfield = nuts.setfield
local getsubtype = nuts.getsubtype
local isglyph = nuts.isglyph
local find_tail = nuts.tail
local flush_list = nuts.flush_list
local flush_node = nuts.flush_node
local traverse_id = nuts.traverse_id
local copy_node = nuts.copy_node
local glyph_code = nodes.nodecodes.glyph
local ligature_code = nodes.glyphcodes.ligature
do -- this is consistent with the rest of context, not that we need it
local p = nodecodes.localpar or nodecodes.local_par
if p then
nodecodes.par = p
nodecodes[p] = "par"
nodecodes.localpar = p -- for old times sake
nodecodes.local_par = p -- for old times sake
end
end
do
local get_components = node.direct.getcomponents
local set_components = node.direct.setcomponents
local function copy_no_components(g,copyinjection)
local components = get_components(g)
if components then
set_components(g)
local n = copy_node(g)
if copyinjection then
copyinjection(n,g)
end
set_components(g,components)
-- maybe also upgrade the subtype but we don't use it anyway
return n
else
local n = copy_node(g)
if copyinjection then
copyinjection(n,g)
end
return n
end
end
local function copy_only_glyphs(current)
local head = nil
local previous = nil
for n in traverse_id(glyph_code,current) do
n = copy_node(n)
if head then
setlink(previous,n)
else
head = n
end
previous = n
end
return head
end
local function count_components(start,marks)
local char = isglyph(start)
if char then
if getsubtype(start) == ligature_code then
local n = 0
local components = get_components(start)
while components do
n = n + count_components(components,marks)
components = getnext(components)
end
return n
elseif not marks[char] then
return 1
end
end
return 0
end
local function flush_components()
-- this is a no-op in mkiv / generic
end
nuts.set_components = set_components
nuts.get_components = get_components
nuts.copy_only_glyphs = copy_only_glyphs
nuts.copy_no_components = copy_no_components
nuts.count_components = count_components
nuts.flush_components = flush_components
end
nuts.uses_font = direct.uses_font
do
-- another poor mans substitute ... i will move these to a more protected
-- namespace .. experimental hack
local dummy = tonut(node.new("glyph"))
nuts.traversers = {
glyph = nuts.traverse_id(nodecodes.glyph,dummy),
glue = nuts.traverse_id(nodecodes.glue,dummy),
disc = nuts.traverse_id(nodecodes.disc,dummy),
boundary = nuts.traverse_id(nodecodes.boundary,dummy),
char = nuts.traverse_char(dummy),
node = nuts.traverse(dummy),
}
end
if not nuts.setreplace then
local getdisc = nuts.getdisc
local setfield = nuts.setfield
function nuts.getreplace(n)
local _, _, h, _, _, t = getdisc(n,true)
return h, t
end
function nuts.setreplace(n,h)
setfield(n,"replace",h)
end
end
do
local getsubtype = nuts.getsubtype
function nuts.start_of_par(n)
local s = getsubtype(n)
return s == 0 or s == 2 -- sorry, hardcoded, won't change anyway
end
end