1 // Copyright 2019 The ChromiumOS Authors 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 mod data; 6 7 use std::collections::HashMap; 8 9 use data::MapEntry; 10 use data::KEYCODE_MAP; 11 12 /// Specifies which type of scancode to convert *from* in the KeycodeTranslator. 13 #[allow(dead_code)] 14 pub enum KeycodeTypes { 15 XkbScancode, 16 WindowsScancode, 17 MacScancode, 18 } 19 20 /// Translates scancodes of a particular type into Linux keycodes. 21 pub struct KeycodeTranslator { 22 keycode_map: HashMap<u32, MapEntry>, 23 } 24 25 impl KeycodeTranslator { 26 /// Create a new KeycodeTranslator that translates from the `from_type` type to Linux keycodes. new(from_type: KeycodeTypes) -> KeycodeTranslator27 pub fn new(from_type: KeycodeTypes) -> KeycodeTranslator { 28 let mut kcm: HashMap<u32, MapEntry> = HashMap::new(); 29 for entry in KEYCODE_MAP.iter() { 30 kcm.insert( 31 match from_type { 32 KeycodeTypes::XkbScancode => entry.xkb, 33 KeycodeTypes::WindowsScancode => entry.win, 34 KeycodeTypes::MacScancode => entry.mac, 35 }, 36 *entry, 37 ); 38 } 39 KeycodeTranslator { keycode_map: kcm } 40 } 41 42 /// Translates the scancode in `from_code` into a Linux keycode. translate(&self, from_code: u32) -> Option<u16>43 pub fn translate(&self, from_code: u32) -> Option<u16> { 44 Some(self.keycode_map.get(&from_code)?.linux_keycode) 45 } 46 } 47 48 #[cfg(test)] 49 mod tests { 50 use crate::keycode_converter::KeycodeTranslator; 51 use crate::keycode_converter::KeycodeTypes; 52 53 #[test] test_translate_win_lin()54 fn test_translate_win_lin() { 55 let translator = KeycodeTranslator::new(KeycodeTypes::WindowsScancode); 56 let translated_code = translator.translate(0x47); 57 assert!(translated_code.is_some()); 58 assert_eq!(translated_code.unwrap(), 71); 59 } 60 61 #[test] test_translate_missing_entry()62 fn test_translate_missing_entry() { 63 let translator = KeycodeTranslator::new(KeycodeTypes::WindowsScancode); 64 65 // No keycodes are this large. 66 let translated_code = translator.translate(0x9999999); 67 assert!(translated_code.is_none()); 68 } 69 } 70