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--[[
LuCI - Internationalisation
Description:
A very minimalistic but yet effective internationalisation module
FileId:
$Id$
License:
Copyright 2008 Steven Barth <steven@midlink.org>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
]]--
--- LuCI translation library.
module("luci.i18n", package.seeall)
require("luci.util")
require("lmo")
table = {}
i18ndir = luci.util.libpath() .. "/i18n/"
loaded = {}
context = luci.util.threadlocal()
default = "en"
--- Clear the translation table.
function clear()
table = {}
end
--- Load a translation and copy its data into the translation table.
-- @param file Language file
-- @param lang Two-letter language code
-- @param force Force reload even if already loaded (optional)
-- @return Success status
function load(file, lang, force)
lang = lang and lang:gsub("_", "-") or ""
if force or not loaded[lang] or not loaded[lang][file] then
local f = lmo.open(i18ndir .. file .. "." .. lang .. ".lmo")
if f then
if not table[lang] then
table[lang] = { f }
setmetatable(table[lang], {
__index = function(tbl, key)
for i = 1, #tbl do
local s = rawget(tbl, i):lookup(key)
if s then return s end
end
end
})
else
table[lang][#table[lang]+1] = f
end
loaded[lang] = loaded[lang] or {}
loaded[lang][file] = true
return true
else
return false
end
else
return true
end
end
--- Load a translation file using the default translation language.
-- Alternatively load the translation of the fallback language.
-- @param file Language file
-- @param force Force reload even if already loaded (optional)
function loadc(file, force)
load(file, default, force)
if context.parent then load(file, context.parent, force) end
return load(file, context.lang, force)
end
--- Set the context default translation language.
-- @param lang Two-letter language code
function setlanguage(lang)
context.lang = lang:gsub("_", "-")
context.parent = (context.lang:match("^([a-z][a-z])_"))
end
--- Return the translated value for a specific translation key.
-- @param key Default translation text
-- @return Translated string
function translate(key)
return (table[context.lang] and table[context.lang][key])
or (table[context.parent] and table[context.parent][key])
or (table[default] and table[default][key])
or key
end
--- Return the translated value for a specific translation key and use it as sprintf pattern.
-- @param key Default translation text
-- @param ... Format parameters
-- @return Translated and formatted string
function translatef(key, ...)
return tostring(translate(key)):format(...)
end
--- Return the translated value for a specific translation key
-- and ensure that the returned value is a Lua string value.
-- This is the same as calling <code>tostring(translate(...))</code>
-- @param key Default translation text
-- @return Translated string
function string(key)
return tostring(translate(key))
end
--- Return the translated value for a specific translation key and use it as sprintf pattern.
-- Ensure that the returned value is a Lua string value.
-- This is the same as calling <code>tostring(translatef(...))</code>
-- @param key Default translation text
-- @param ... Format parameters
-- @return Translated and formatted string
function stringf(key, ...)
return tostring(translate(key)):format(...)
end
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