luametalatex/luametalatex-firstcode.lua

local lua_call_cmd = token.command_id'lua_call'
local properties = node.direct.get_properties_table()
node.direct.properties = properties
function node.direct.get_properties_table()
  return properties
end
-- setmetatable(node.direct.get_properties_table(), {
--     __index = function(t, id)
--       local new = {}
--       t[id] = new
--       return new
--     end
--   })

local new_whatsit = require'luametalatex-whatsits'.new
local whatsit_id = node.id'whatsit'
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.command > 0 and tok.command ~= 9 and tok.index <= token.biggest_char()
          or (token.put_next(tok) and false))
      and (quoted or tok.index ~= string.byte' ') do
    if tok.index == string.byte'"' then
      quoted = not quoted
    else
      name[#name+1] = tok.index
    end
    tok = token.scan_token()
  end
  return utf8.char(table.unpack(name))
end

local l = lpeg or require'lpeg'
local add_file_extension = l.Cs((1-('.' * (1-l.S'./\\')^0) * -1)^0 * (l.P(1)^1+l.Cc'.tex'))
local ofiles = {}
local function do_openout(p)
  if ofiles[p.file] then
    error[[Existing file]]
  else
    local msg
    ofiles[p.file], msg = io.open(add_file_extension:match(p.name), 'w')
    if not ofiles[p.file] then
      error(msg)
    end
  end
end
local open_whatsit = new_whatsit('open', do_openout)
token.luacmd("openout", function(_, immediate) -- \openout
  local file = token.scan_int()
  token.scan_keyword'='
  local name = scan_filename()
  local props = {file = file, name = name}
  if immediate == "immediate" then
    do_openout(props)
  else
    local whatsit = node.direct.new(whatsit_id, open_whatsit)
    properties[whatsit] = props
    node.direct.write(whatsit)
  end
end, "protected")
local function do_closeout(p)
  if ofiles[p.file] then
    ofiles[p.file]:close()
    ofiles[p.file] = nil
  end
end
local close_whatsit = new_whatsit('close', do_closeout)
token.luacmd("closeout", function(_, immediate) -- \closeout
  local file = token.scan_int()
  local props = {file = file}
  if immediate == "immediate" then
    do_closeout(props)
  else
    local whatsit = node.direct.new(whatsit_id, close_whatsit)
    properties[whatsit] = props
    node.direct.write(whatsit)
  end
end, "protected")
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
local write_whatsit = new_whatsit('write', do_write)
token.luacmd("write", function(_, immediate) -- \write
  local file = token.scan_int()
  local content = token.scan_tokenlist()
  local props = {file = file, data = content}
  if immediate == "immediate" then
    do_write(props)
  else
    local whatsit = node.direct.new(whatsit_id, write_whatsit)
    properties[whatsit] = props
    node.direct.write(whatsit)
  end
end, "protected")
local late_lua_whatsit = new_whatsit('late_lua', function(p, pfile, n, x, y)
  local code = p.data
  if not code then
    code = token.to_string(p.token)
  end
  if type(code) == 'string' then
    code = assert(load(code, nil, 't'))
  elseif not code then
    error[[Missing code in latelua]]
  end
  return pdf._latelua(pfile, x, y, code)
end)
token.luacmd("latelua", function(_) -- \latelua
  local content = token.scan_tokenlist()
  local props = {token = content}
  local whatsit = node.direct.new(whatsit_id, late_lua_whatsit)
  properties[whatsit] = props
  node.direct.write(whatsit)
end, "protected")

local functions = lua.get_functions_table()
token.luacmd("immediate", function() -- \immediate
  local next_tok = token.scan_token()
  if next_tok.command ~= lua_call_cmd then
    return token.put_next(next_tok)
  end
  local function_id = next_tok.index
  return functions[function_id](function_id, 'immediate')
end, "protected")

require'luametalatex-baseregisters'
require'luametalatex-back-pdf'
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")