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-- 
--  This is file `luainputenc.lua',
--  generated with the docstrip utility.
-- 
--  The original source files were:
-- 
--  luainputenc.dtx  (with options: `lua')
--  This is a generated file.
--  
--  Copyright (C) 2009 by Elie Roux <elie.roux@telecom-bretagne.eu>
--  
--  This work is under the CC0 license. As an exception, the files
--  luainputenc.sty, lutf8.def and lutf8x.def have more restrictions.
--  See these file for more details.
--  
--  People who helped on this package:
--    Javier Bezos
--    Will Robertson
--    Hans Hagen
--    Heiko Oberdiek
--    Javier Mugica
--  
--  This work consists of the main source file luainputenc.dtx
--  and the derived files
--     luainputenc.sty, luainputenc.lua, lutf8.def, lutf8x.def,
--     eu2enc.def, eu2lmr.fd and luainputenc.pdf
--  

luainputenc = { }

luainputenc.module = {
    name          = "luainputenc",
    version       =  0.93,
    date          = "2009/04/15",
    description   = "Lua simple inputenc package.",
    author        = "Elie Roux",
    copyright     = "Elie Roux",
    license       = "CC0",
}

luatextra.provides_module(luainputenc.module)

local format = string.format

luainputenc.log = luainputenc.log or function(...)
  luatextra.module_log('luainputenc', format(...))
end

local char, utfchar, byte, format, gsub =
string.char, unicode.utf8.char, string.byte, string.format, string.gsub

local started, stopped = 1, 0

luainputenc.state = stopped

function luainputenc.setstate(state)
    if state == luainputenc.state then
        return
    elseif state == started then
        luainputenc.start()
    else
        luainputenc.stop()
    end
end

function luainputenc.setstarted()
    luainputenc.setstate(started)
end

function luainputenc.setstopped()
    luainputenc.setstate(stopped)
end


function luainputenc.byte_to_utf(c)
    return utfchar(byte(c))
end


function luainputenc.fake_utf(buf)
    return gsub(buf,"(.)", luainputenc.byte_to_utf)
end


function luainputenc.start()
    callback.add('process_input_buffer', luainputenc.fake_utf,
'luainputenc.fake_utf')
    luainputenc.state = started
    if luainputenc.callback_registered == 0 then
        luainputenc.register_callback()
    end
end

function luainputenc.stop()
    callback.remove('process_input_buffer', 'luainputenc.fake_utf')
    luainputenc.state = stopped
    return
end


luainputenc.unicode_extentions = {
  ['.aux'] = 1, -- basic files
  ['.toc'] = 1,
  ['.gls'] = 1,
  ['.ind'] = 1,
  ['.idx'] = 1,
  ['.vrb'] = 1, -- beamer and powerdot
  ['.nav'] = 1, -- other beamer extentions
  ['.sol'] = 1,
  ['.qsl'] = 1,
  ['.snm'] = 1,
  ['.pgn'] = 1, -- pagereference
  ['.cpg'] = 1, -- AlProTeX
  ['.pst'] = 1, -- pst-tree
  ['.tmp'] = 1, -- sauerj/collect
  ['.sym'] = 1, -- listofsymbols
  ['.sub'] = 1, -- listofsymbols
  ['.lof'] = 1, -- preprint
  ['.lot'] = 1, -- preprint
  ['mtc1'] = 1, -- minitoc
  ['.ovr'] = 1, -- thumbss
  ['.fff'] = 1, -- endplate
  ['.sbb'] = 1, -- splitbib
  ['.bbl'] = 1, -- latex
  ['.ain'] = 1, -- authorindex
  ['.abb'] = 1, -- juraabbrev
  ['.ent'] = 1, -- endnotes
  ['.end'] = 1, -- fn2end
  ['.thm'] = 1, -- ntheorem
  ['.xtr'] = 1, -- extract
  ['.han'] = 1, -- linguho
  ['.bnd'] = 1, -- bibref
  ['.bbl'] = 1, -- bibref
  ['.col'] = 1, -- mwrite
  ['.ttt'] = 1, -- endfloat
  ['.fax'] = 1, -- lettre
  ['.tns'] = 1, -- lettre
  ['.odt'] = 1, -- lettre
  ['.etq'] = 1, -- lettre
  ['.emd'] = 1, -- poemscol
  ['.emx'] = 1, -- poemscol
  ['.ctn'] = 1, -- poemscol
  ['.hst'] = 1, -- vhistory
  ['.acr'] = 1, -- crosswrd
  ['.dwn'] = 1, -- crosswrd
  ['.ttc'] = 1, -- talk
  -- ['.txt'] = 1, -- coverpage, but not sure it's safe to include it...
  ['.eve'] = 1, -- calend0
  ['.scn'] = 1, -- cwebmac
  }


luainputenc.unicode_files = {}

luainputenc.non_unicode_files = {}

function luainputenc.set_unicode_file(filename)
    if luainputenc.non_unicode_files[filename] == 1 then
        luainputenc.non_unicode_files[filename] = nil
    end
    luainputenc.unicode_files[filename] = 1
end

function luainputenc.set_non_unicode_file(filename)
    if luainputenc.unicode_files[filename] == 1 then
        luainputenc.unicode_files[filename] = nil
    end
    luainputenc.non_unicode_files[filename] = 1
end

function luainputenc.set_unicode_extention(ext)
    luainputenc.unicode_extention[ext] = 1
end

function luainputenc.set_non_unicode_extention(ext)
    if luainputenc.unicode_extentions[ext] == 1 then
        luainputenc.unicode_extentions[ext] = nil
    end
end

function luainputenc.unset_file(filename)
    if luainputenc.unicode_files[filename] == 1 then
        luainputenc.unicode_files[filename] = nil
    elseif luainputenc.non_unicode_files[filename] == 1 then
        luainputenc.non_unicode_files[filename] = nil
    end
end

local unicode, non_unicode = stopped, started

function luainputenc.find_state(filename)
    if luainputenc.unicode_files[filename] == 1 then
        return unicode
    elseif luainputenc.non_unicode_files[filename] == 1 then
        return non_unicode
    else
        local ext = filename:sub(-4)
         if luainputenc.unicode_extentions[ext] == 1 then
             return unicode
         else
            return non_unicode
         end
    end
end


function luainputenc.pre_read_file(env)
    local currentstate = luainputenc.state
    luainputenc.setstate(luainputenc.find_state(env.filename))
    env.previousstate = currentstate
end

function luainputenc.close(env)
    luainputenc.setstate(env.previousstate)
end

luainputenc.callback_registered = 0

function luainputenc.register_callback()
    if luainputenc.callback_registered == 0 then
        callback.add('pre_read_file', luainputenc.pre_read_file,
'luainputenc.pre_read_file')
        callback.add('file_close', luainputenc.close, 'luainputenc.close')
        luainputenc.callback_registered = 1
    end
end


luainputenc.activated_characters = {}
luainputenc.characters_are_activated = false

function luainputenc.declare_character(c)
    luainputenc.activated_characters[tonumber(c)] = true
end

function luainputenc.force_characters_activated ()
    luainputenc.characters_are_activated = true
end

function luainputenc.activate_characters()
    if not luainputenc.characters_are_activated then
        for n, _ in pairs(luainputenc.activated_characters) do
            tex.sprint(string.format('\\catcode %d\\active',n))
        end
        luainputenc.characters_are_activated = true
    end
end

function luainputenc.desactivate_characters()
    if luainputenc.characters_are_activated then
        for n, _ in pairs(luainputenc.activated_characters) do
            tex.sprint(string.format('\\catcode %d=11',n))
        end
        luainputenc.characters_are_activated = false
    end
end

-- 
--  End of File `luainputenc.lua'.