10ea276052
xkb layouts are translated fine by libgnome-desktop. If not we should go fixing there since that makes keyboard layout strings consistent with e.g. gnome-control-center. There weren't any 'exotic' strings in the current translations so what we get from libgnome-desktop should be just fine.
115 lines
2.9 KiB
Rust
115 lines
2.9 KiB
Rust
/*! Locale-specific functions.
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*
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* This file is intended as a library:
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* it must pass errors upwards
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* and panicking is allowed only when
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* this code encounters an internal inconsistency.
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*/
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use std::cmp;
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use std::ffi::{ CStr, CString };
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use std::fmt;
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use std::os::raw::c_char;
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use std::ptr;
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use std::str::Utf8Error;
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mod c {
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use super::*;
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use std::os::raw::c_void;
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#[allow(non_camel_case_types)]
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pub type c_int = i32;
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#[derive(Clone, Copy)]
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#[repr(C)]
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pub struct GnomeXkbInfo(*const c_void);
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extern "C" {
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// from libc
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pub fn strcoll(cs: *const c_char, ct: *const c_char) -> c_int;
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// from gnome-desktop3
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pub fn gnome_xkb_info_new() -> GnomeXkbInfo;
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pub fn gnome_xkb_info_get_layout_info (
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info: GnomeXkbInfo,
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id: *const c_char,
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display_name: *mut *const c_char,
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short_name: *const *const c_char,
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xkb_layout: *const *const c_char,
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xkb_variant: *const *const c_char
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) -> c_int;
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pub fn g_object_unref(o: GnomeXkbInfo);
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}
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}
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#[derive(Debug)]
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pub enum Error {
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StringConversion(Utf8Error),
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NoInfo,
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}
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impl fmt::Display for Error {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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fmt::Debug::fmt(&self, f)
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}
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}
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pub struct XkbInfo(c::GnomeXkbInfo);
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impl XkbInfo {
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pub fn new() -> XkbInfo {
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XkbInfo(unsafe { c::gnome_xkb_info_new() })
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}
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pub fn get_display_name(&self, id: &str) -> Result<String, Error> {
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let id = cstring_safe(id);
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let id_ref = id.as_ptr();
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let mut display_name: *const c_char = ptr::null();
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let found = unsafe {
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c::gnome_xkb_info_get_layout_info(
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self.0,
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id_ref,
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&mut display_name as *mut *const c_char,
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ptr::null(), ptr::null(), ptr::null(),
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)
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};
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if found != 0 && !display_name.is_null() {
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let display_name = unsafe { CStr::from_ptr(display_name) };
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display_name.to_str()
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.map(str::to_string)
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.map_err(Error::StringConversion)
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} else {
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Err(Error::NoInfo)
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}
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}
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}
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impl Drop for XkbInfo {
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fn drop(&mut self) {
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unsafe { c::g_object_unref(self.0) }
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}
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}
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#[derive(Clone, Debug, PartialEq)]
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pub struct OwnedTranslation(pub String);
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fn cstring_safe(s: &str) -> CString {
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CString::new(s)
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.unwrap_or(CString::new("").unwrap())
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}
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pub fn compare_current_locale(a: &str, b: &str) -> cmp::Ordering {
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let a = cstring_safe(a);
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let b = cstring_safe(b);
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let a = a.as_ptr();
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let b = b.as_ptr();
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let result = unsafe { c::strcoll(a, b) };
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if result == 0 {
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cmp::Ordering::Equal
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} else if result > 0 {
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cmp::Ordering::Greater
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} else if result < 0 {
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cmp::Ordering::Less
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} else {
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unreachable!()
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}
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}
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