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-- gitano.i18n
--
-- Internationalisation support for Gitano
--
-- Copyright 2016-2017 Daniel Silverstone <dsilvers@digital-scurf.org>
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in the
-- documentation and/or other materials provided with the distribution.
-- 3. Neither the name of the author nor the names of their contributors
-- may be used to endorse or promote products derived from this software
-- without specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-- ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-- LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-- OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-- SUCH DAMAGE.
--
local tongue = require "tongue"
local _util = nil
local function util()
if _util == nil then
_util = require "gitano.util"
end
return _util
end
local basepath, pluginpaths = nil, {}
local function add_plugin_path(path)
pluginpaths[#pluginpaths+1] = path
end
local codex = nil
local function get_base_lang(lang, sublang)
if sublang then lang = lang .. "_" .. sublang end
local fh = io.open(util().path_join(basepath, lang .. ".parent"), "r")
if fh then
local parent = fh:read("*a"):gsub("\n", "")
fh:close()
return parent
end
end
local function new_gitano_pack(codex, lang, sublang)
local base = get_base_lang(lang, sublang) or (sublang and lang) or
((lang ~= "json" and lang ~= "en") and "en")
if base then
base = codex:get_langpack(base)
end
return tongue.langpack.create(lang, sublang, base)
end
local function base_packloader(codex, pack, fulllang)
local chunk, err = loadfile(util().path_join(basepath, fulllang .. ".lua"))
if chunk then
local ok, tab = pcall(chunk)
if ok and type(tab) == "table" then
-- Able to load the base pack, so inject it...
for k, v in pairs(tab) do
pack:add_token(k, v)
end
end
end
end
local function initialise()
assert(basepath, "No basepath provided!")
if codex then return end
codex = tongue.codex.create(new_gitano_pack)
codex:add_loader(base_packloader)
end
local function plugin_packloader(codex, pack, fulllang, path)
local chunk, err = loadfile(path .. fulllang .. ".lua")
if chunk then
local ok, tab = pcall(chunk)
if ok and type(tab) == "table" then
-- Able to load the plugin pack, so inject it...
for k, v in pairs(tab) do
pack:add_token(k, v)
end
end
end
end
local function set_langpack_path(path)
basepath = path
initialise()
codex:add_loader(function(codex, pack, fulllang)
return plugin_packloader(codex, pack, fulllang, path)
end)
end
local activelang, activesublang, activeencoding = nil, nil, nil
local function set_category(cat)
local env
if cat then
env = { LC_ALL = cat }
end
activeencoding, activelang = tongue.transliteration.guess(env)
if not activelang then activelang = "en" end
local lang, sublang = tongue.util.split_category(activelang)
activelang, activesublang = lang, sublang
end
local function expand(token, vars)
initialise()
return activeencoding:touser(codex:expand(activelang, activesublang,
token, vars or {}))
end
local function decode(s)
return activeencoding:fromuser(s)
end
local function encode(s)
return activeencoding:touser(s)
end
return {
set_langpack_path = set_langpack_path,
add_plugin_path = add_plugin_path,
set_category = set_category,
expand = expand,
decode = decode,
encode = encode,
}
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