| // Copyright 2016 Joe Wilm, The Alacritty Project Contributors |
| // |
| // 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. |
| #![cfg(target_os = "macos")] |
| use libc::{LC_CTYPE, setlocale}; |
| use std::ffi::{CString, CStr}; |
| use std::os::raw::c_char; |
| use std::ptr::null; |
| use std::slice; |
| use std::str; |
| use std::env; |
| |
| use objc::runtime::{Class, Object}; |
| |
| pub fn set_locale_environment() { |
| let locale_id = unsafe { |
| let locale_class = Class::get("NSLocale").unwrap(); |
| let locale: *const Object = msg_send![locale_class, currentLocale]; |
| let _ : () = msg_send![locale_class, release]; |
| // `localeIdentifier` returns extra metadata with the locale (including currency and |
| // collator) on newer versions of macOS. This is not a valid locale, so we use |
| // `languageCode` and `countryCode`, if they're available (macOS 10.12+): |
| // https://developer.apple.com/documentation/foundation/nslocale/1416263-localeidentifier?language=objc |
| // https://developer.apple.com/documentation/foundation/nslocale/1643060-countrycode?language=objc |
| // https://developer.apple.com/documentation/foundation/nslocale/1643026-languagecode?language=objc |
| let is_language_code_supported: bool = msg_send![locale, respondsToSelector:sel!(languageCode)]; |
| let is_country_code_supported: bool = msg_send![locale, respondsToSelector:sel!(countryCode)]; |
| let locale_id = if is_language_code_supported && is_country_code_supported { |
| let language_code: *const Object = msg_send![locale, languageCode]; |
| let country_code: *const Object = msg_send![locale, countryCode]; |
| let language_code_str = nsstring_as_str(language_code).to_owned(); |
| let _ : () = msg_send![language_code, release]; |
| let country_code_str = nsstring_as_str(country_code).to_owned(); |
| let _ : () = msg_send![country_code, release]; |
| format!("{}_{}.UTF-8", &language_code_str, &country_code_str) |
| } else { |
| let identifier: *const Object = msg_send![locale, localeIdentifier]; |
| let identifier_str = nsstring_as_str(identifier).to_owned(); |
| let _ : () = msg_send![identifier, release]; |
| identifier_str + ".UTF-8" |
| }; |
| let _ : () = msg_send![locale, release]; |
| locale_id |
| }; |
| // check if locale_id is valid |
| let locale_c_str = CString::new(locale_id.to_owned()).unwrap(); |
| let locale_ptr = locale_c_str.as_ptr(); |
| let locale_id = unsafe { |
| // save a copy of original setting |
| let original = setlocale(LC_CTYPE, null()); |
| let saved_original = if original.is_null() { |
| CString::new("").unwrap() |
| } else { |
| CStr::from_ptr(original).to_owned() |
| }; |
| // try setting `locale_id` |
| let modified = setlocale(LC_CTYPE, locale_ptr); |
| let result = if modified.is_null() { |
| String::from("") |
| } else { |
| locale_id |
| }; |
| // restore original setting |
| setlocale(LC_CTYPE, saved_original.as_ptr()); |
| result |
| }; |
| |
| env::set_var("LANG", &locale_id); |
| } |
| |
| const UTF8_ENCODING: usize = 4; |
| |
| unsafe fn nsstring_as_str<'a>(nsstring: *const Object) -> &'a str { |
| let cstr: *const c_char = msg_send![nsstring, UTF8String]; |
| let len: usize = msg_send![nsstring, lengthOfBytesUsingEncoding: UTF8_ENCODING]; |
| str::from_utf8(slice::from_raw_parts(cstr as *const u8, len)).unwrap() |
| } |
| |
| #[cfg(not(target_os = "macos"))] |
| pub fn set_locale_environment() {} |