A crate to help you internationalize your Rocket or Actix Web applications.
It just selects the correct locale for each request, and return the corresponding gettext::Catalog
.
Usage
First add it to your Cargo.toml
:
[dependencies]
rocket_i18n = "0.4"
gettext-macros = "0.1" # Provides proc-macros to manage translations
Then, in your main.rs
:
# use rocket;
use gettext_macros::{compile_i18n, include_i18n, init_i18n};
init_i18n!("my_web_app", en, eo, it, pl);
fn main() {
rocket::ignite()
// Make Rocket manage your translations.
.manage(include_i18n!());
// Register routes, etc
}
compile_i18n!();
Then in all your requests you'll be able to use the i18n
macro to translate anything.
It takes a gettext::Catalog
and a string to translate as argument.
use gettext_macros::i18n;
use rocket_i18n::I18n;
#[get("/")]
fn route(i18n: I18n) -> &str {
i18n!(i18n.catalog, "Hello, world!")
}
For strings that may have a plural form, just add the plural and the number of element to the arguments
i18n!(i18n.catalog, "One new message", "{0} new messages", 42);
Any extra argument, after a ;
, will be used for formatting.
let user_name = "Alex";
i18n!(i18n.catalog, "Hello {0}!"; user_name);
When using it with plural, {0}
will be the number of elements, and other arguments will start
at {1}
.
Because of its design, rocket_i18n is only compatible with askama, ructe or compiled templates
in general.
You can use the t
macro in your templates, as long as they have a field called catalog
to
store your catalog.
Using with Actix Web
First, disable the default features so it doesn't pull in all of Rocket.
[dependencies.rocket_i18n]
version = "0.4"
default-features = false
features = ["actix-web"]
Then add it to your application.
use gettext_macros::*;
use rocket_i18n::{I18n, Internationalized, Translations};
fn route_handler(i18n: I18n) -> &str {
i18n!(i18n.catalog, "Hello, world!")
}
#[derive(Clone)]
struct MyState {
translations: Translations,
}
impl Internationalized for MyState {
fn get(&self) -> Translations {
self.translations.clone()
}
}
fn main() {
let state = MyState {
translations: rocket_i18n::i18n("your-domain", vec![ "en", "fr", "de", "ja" ]);
};
App::with_state(state)
.resource("", |r| r.with(route_handler))
.finish();
}