1 /* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
4
5 use winapi::um::dwrite::IDWriteLocalizedStrings;
6 use winapi::ctypes::wchar_t;
7 use comptr::ComPtr;
8 use winapi::shared::winerror::S_OK;
9 use winapi::shared::minwindef::{BOOL, FALSE};
10 use winapi::um::winnls::GetUserDefaultLocaleName;
11 use std::ffi::{OsStr};
12 use std::os::windows::ffi::{OsStrExt};
13
14
15 lazy_static! {
16 static ref SYSTEM_LOCALE: Vec<wchar_t> = {
17 unsafe {
18 let mut locale: Vec<wchar_t> = vec![0; 85];
19 GetUserDefaultLocaleName(locale.as_mut_ptr(), locale.len() as i32 - 1);
20 locale
21 }
22 };
23 static ref EN_US_LOCALE: Vec<wchar_t> = {
24 OsStr::new("en-us").encode_wide().collect()
25 };
26 }
27
get_locale_string(strings: &mut ComPtr<IDWriteLocalizedStrings>) -> String28 pub fn get_locale_string(strings: &mut ComPtr<IDWriteLocalizedStrings>) -> String {
29 unsafe {
30 let mut index: u32 = 0;
31 let mut exists: BOOL = FALSE;
32 let hr = strings.FindLocaleName((*SYSTEM_LOCALE).as_ptr(), &mut index, &mut exists);
33 if hr != S_OK || exists == FALSE {
34 let hr = strings.FindLocaleName((*EN_US_LOCALE).as_ptr(), &mut index, &mut exists);
35 if hr != S_OK || exists == FALSE {
36 // Ultimately fall back to first locale on list
37 index = 0;
38 }
39 }
40
41 let mut length: u32 = 0;
42 let hr = strings.GetStringLength(index, &mut length);
43 assert!(hr == 0);
44
45 let mut name: Vec<wchar_t> = Vec::with_capacity(length as usize + 1);
46 let hr = strings.GetString(index, name.as_mut_ptr(), length + 1);
47 assert!(hr == 0);
48 name.set_len(length as usize);
49
50 String::from_utf16(&name).ok().unwrap()
51 }
52 }
53
54 // ToWide from https://github.com/retep998/wio-rs/blob/master/src/wide.rs
55
56 pub trait ToWide {
to_wide(&self) -> Vec<u16>57 fn to_wide(&self) -> Vec<u16>;
to_wide_null(&self) -> Vec<u16>58 fn to_wide_null(&self) -> Vec<u16>;
59 }
60
61 impl<T> ToWide for T where T: AsRef<OsStr> {
to_wide(&self) -> Vec<u16>62 fn to_wide(&self) -> Vec<u16> {
63 self.as_ref().encode_wide().collect()
64 }
to_wide_null(&self) -> Vec<u16>65 fn to_wide_null(&self) -> Vec<u16> {
66 self.as_ref().encode_wide().chain(Some(0)).collect()
67 }
68 }
69