luametalatex/luametalatex-firstcode.lua

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local functions = lua.getfunctionstable()
-- I am not sure why this is necessary, but otherwise LuaMetaTeX resets
-- the functions table every time the getter is called
function lua.get_functions_table() return functions end
local set_lua = token.set_lua
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-- There are two approaches to manage luafunctions ids without triggering
-- issues with ltluatex assigned numbers: Originally we assigned numbers
-- starting with 1, then switched to luatexbase ASAP and synchronised both
-- numbering schemes. But there is a useful quirk in ltluatex's luafunction
-- allocator: It only uses numbers upto 65535, so we can just use bigger
-- numbers. (This might have negative repercussins on performance because it
-- probably doesn't store the function in the array part of the Lua table.
-- Let's reconsider if this ever becomes a problem.
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-- local new_luafunction = luatexbase.new_luafunction
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local predefined_luafunctions = status.ini_version and 65535 -- 1<<16 - 1 -- We start with 1<<16
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local function new_luafunction(name)
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if predefined_luafunctions then
predefined_luafunctions = predefined_luafunctions + 1
return predefined_luafunctions
else
error[[Here only preexisting luafunctions should be set]]
end
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end
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local undefined_cmd = token.command_id'undefined_cs'
local lua_call_cmd = token.command_id'lua_call'
local lua_value_cmd = token.command_id'lua_value'
local lua_expandable_call_cmd = token.command_id'lua_expandable_call'
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function token.luacmd(name, func, ...)
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local idx
local tok = token.create(name)
local cmd = tok.command
if cmd == lua_value_cmd then
idx = tok.mode
elseif cmd == lua_call_cmd then
idx = tok.mode
elseif cmd == lua_expandable_call_cmd then
idx = tok.mode
elseif ... == 'force' then
idx = new_luafunction(name)
set_lua(name, idx, select(2, ...))
elseif cmd == undefined_cmd then
idx = new_luafunction(name)
set_lua(name, idx, ...)
else
error(tok.cmdname)
end
if functions[idx] then
error[[Already defined]]
end
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functions[idx] = func
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return idx
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end
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local properties = node.direct.get_properties_table()
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node.direct.properties = properties
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function node.direct.get_properties_table()
return properties
end
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-- setmetatable(node.direct.get_properties_table(), {
-- __index = function(t, id)
-- local new = {}
-- t[id] = new
-- return new
-- end
-- })
local whatsit_id = node.id'whatsit'
local whatsits = {
[0] = "open",
"write",
"close",
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"special",
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nil,
nil,
"save_pos",
"late_lua",
"user_defined",
nil,
nil,
nil,
nil,
nil,
nil,
nil,
"pdf_literal",
"pdf_refobj",
"pdf_annot",
"pdf_start_link",
"pdf_end_link",
"pdf_dest",
"pdf_action",
"pdf_thread",
"pdf_start_thread",
"pdf_end_thread",
"pdf_thread_data",
"pdf_link_data",
"pdf_colorstack",
"pdf_setmatrix",
"pdf_save",
"pdf_restore",
}
whatsits[whatsits[0]] = 0
for i = 0,#whatsits do
local v = whatsits[i]
if v then
whatsits[v] = i
end
end
function node.whatsits() return whatsits end
function node.subtype(s) return type(s) == "string" and whatsits[s] or nil end
local spacer_cmd, relax_cmd = token.command_id'spacer', token.command_id'relax'
local function scan_filename()
local name = {}
local quoted = false
local tok, cmd
repeat
tok = token.scan_token()
cmd = tok.command
until cmd ~= spacer_cmd and cmd ~= relax_cmd
while (tok.command <= 12 and tok.mode <= token.biggest_char()
or (token.put_next(tok) and false))
and (quoted or tok.mode ~= string.byte' ') do
if tok.mode == string.byte'"' then
quoted = not quoted
else
name[#name+1] = tok.mode
end
tok = token.scan_token()
end
return utf8.char(table.unpack(name))
end
local ofiles = {}
local function do_openout(p)
if ofiles[p.file] then
error[[Existing file]]
else
local msg
ofiles[p.file], msg = io.open(p.name, 'w')
if not ofiles[p.file] then
error(msg)
end
end
end
token.luacmd("openout", function(_, immediate) -- \openout
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local file = token.scan_int()
token.scan_keyword'='
local name = scan_filename()
local props = {file = file, name = name, handle = do_openout}
if immediate == "immediate" then
do_openout(props)
else
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local whatsit = node.direct.new(whatsit_id, whatsits.open)
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properties[whatsit] = props
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node.direct.write(whatsit)
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end
end, "protected")
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local function do_closeout(p)
if ofiles[p.file] then
ofiles[p.file]:close()
ofiles[p.file] = nil
end
end
token.luacmd("closeout", function(_, immediate) -- \closeout
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local file = token.scan_int()
local props = {file = file, handle = do_closeout}
if immediate == "immediate" then
do_closeout(props)
else
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local whatsit = node.direct.new(whatsit_id, whatsits.close)
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properties[whatsit] = props
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node.direct.write(whatsit)
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end
end, "protected")
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local function do_write(p)
local content = token.to_string(p.data) .. '\n'
local file = ofiles[p.file]
if file then
file:write(content)
else
texio.write_nl(p.file < 0 and "log" or "term and log", content)
end
end
token.luacmd("write", function(_, immediate) -- \write
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local file = token.scan_int()
local content = token.scan_tokenlist()
local props = {file = file, data = content, handle = do_write}
if immediate == "immediate" then
do_write(props)
else
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local whatsit = node.direct.new(whatsit_id, whatsits.write)
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properties[whatsit] = props
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node.direct.write(whatsit)
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end
end, "protected")
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token.luacmd("immediate", function() -- \immediate
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local next_tok = token.scan_token()
if next_tok.command ~= lua_call_cmd then
return token.put_next(next_tok)
end
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local function_id = next_tok.mode
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functions[function_id](function_id, 'immediate')
end, "protected")
-- functions[43] = function() -- \pdfvariable
-- local name = token.scan_string()
-- print('Missing \\pdf' .. name)
-- end
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if status.ini_version then
function fixupluafunctions()
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return predefined_luafunctions
end
else
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function fixupluafunctions(i)
predefined_luafunctions = i
end
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local prepared_code = lua.bytecode[1]
prepared_code()
lua.bytecode[1] = nil
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-- function fixupluafunctions()
-- new_luafunction = luatexbase.new_luafunction
-- fixupluafunctions = nil
-- end
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end
require'luametalatex-back-pdf'
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require'luametalatex-node-luaotfload'
local integer_code do
local value_values = token.values'value'
for i=0,#value_values do
if value_values[i] == "integer" then
integer_code = i
break
end
end
end
token.luacmd("Umathcodenum", function(_, scanning)
if scanning then
local class, family, char = tex.getmathcodes (token.scan_int())
return integer_code, char | (class | family << 3) << 21
else
local char = token.scan_int()
local mathcode = token.scan_int()
tex.setmathcodes(char, (mathcode >> 21) & 7, mathcode >> 24, mathcode & 0x1FFFFF)
end
end, "force", "global", "value")