Split alacritty into a separate crates

The crate containing the entry point is called alacritty, and the crate
containing everything else is called alacritty_terminal.

1 files changed, 89 insertions, 0 deletions

diff --git a/alacritty_terminal/src/locale.rs b/alacritty_terminal/src/locale.rs
new file mode 100644
index 00000000..40c915b5
--- /dev/null
+++ b/alacritty_terminal/src/locale.rs
@@ -0,0 +1,89 @@
+// 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.
+#![allow(clippy::let_unit_value)]
+#![cfg(target_os = "macos")]
+use libc::{setlocale, LC_CTYPE};
+use std::env;
+use std::ffi::{CStr, CString};
+use std::os::raw::c_char;
+use std::ptr::null;
+use std::slice;
+use std::str;
+
+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::new() } 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() {}