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use wayland_client::{Event, EventIterator, Proxy};
use wayland_client::wayland::seat::{WlSeat, WlKeyboard, WlKeyboardEvent, WlKeyboardKeyState};
use std::fs::File;
use std::iter::Iterator;
use std::ptr;
use std::os::unix::io::{FromRawFd, RawFd};
use std::sync::{Arc, Mutex};
use memmap::{Mmap, Protection};
use ffi;
use ffi::XKBCOMMON_HANDLE as XKBH;
struct KbState {
xkb_context: *mut ffi::xkb_context,
xkb_keymap: *mut ffi::xkb_keymap,
xkb_state: *mut ffi::xkb_state
}
impl KbState {
fn update_modifiers(&mut self, mods_depressed: u32, mods_latched: u32, mods_locked: u32, group: u32) {
unsafe {
(XKBH.xkb_state_update_mask)(
self.xkb_state, mods_depressed, mods_latched, mods_locked, 0, 0, group);
}
}
pub fn get_one_sym(&self, keycode: u32) -> u32 {
unsafe {
(XKBH.xkb_state_key_get_one_sym)(
self.xkb_state, keycode + 8)
}
}
pub fn get_utf8(&self, keycode: u32) -> Option<String> {
let size = unsafe {
(XKBH.xkb_state_key_get_utf8)(self.xkb_state, keycode + 8, ptr::null_mut(), 0)
} + 1;
if size <= 1 { return None };
let mut buffer = Vec::with_capacity(size as usize);
unsafe {
buffer.set_len(size as usize);
(XKBH.xkb_state_key_get_utf8)(
self.xkb_state, keycode + 8, buffer.as_mut_ptr() as *mut _, size as usize);
};
buffer.pop();
Some(String::from_utf8(buffer).unwrap())
}
}
pub enum MappedKeyboardEvent {
KeyEvent(KeyEvent),
Other(WlKeyboardEvent)
}
pub struct KeyEvent {
pub keycode: u32,
state: Arc<Mutex<KbState>>,
pub serial: u32,
pub time: u32,
pub keystate: WlKeyboardKeyState
}
impl KeyEvent {
pub fn as_utf8(&self) -> Option<String> {
self.state.lock().unwrap().get_utf8(self.keycode)
}
pub fn as_symbol(&self) -> Option<u32> {
let val = self.state.lock().unwrap().get_one_sym(self.keycode);
if val == 0 {
None
} else {
Some(val)
}
}
}
#[doc(hidden)]
unsafe impl Send for KbState {}
impl Drop for KbState {
fn drop(&mut self) {
unsafe {
(XKBH.xkb_state_unref)(self.xkb_state);
(XKBH.xkb_keymap_unref)(self.xkb_keymap);
(XKBH.xkb_context_unref)(self.xkb_context);
}
}
}
pub struct MappedKeyboard {
wkb: WlKeyboard,
state: Arc<Mutex<KbState>>,
iter: EventIterator
}
pub enum MappedKeyboardError {
XKBNotFound,
NoKeyboardOnSeat
}
impl MappedKeyboard {
pub fn new(seat: &WlSeat) -> Result<MappedKeyboard, MappedKeyboardError> {
let mut keyboard = seat.get_keyboard();
let xkbh = match ffi::XKBCOMMON_OPTION.as_ref() {
Some(h) => h,
None => return Err(MappedKeyboardError::XKBNotFound)
};
let xkb_context = unsafe {
(xkbh.xkb_context_new)(ffi::xkb_context_flags::XKB_CONTEXT_NO_FLAGS)
};
if xkb_context.is_null() { return Err(MappedKeyboardError::XKBNotFound) }
let iter = EventIterator::new();
keyboard.set_evt_iterator(&iter);
Ok(MappedKeyboard {
wkb: keyboard,
state: Arc::new(Mutex::new(KbState {
xkb_context: xkb_context,
xkb_keymap: ptr::null_mut(),
xkb_state: ptr::null_mut()
})),
iter: iter
})
}
fn init(&mut self, fd: RawFd, size: usize) {
let mut state = self.state.lock().unwrap();
let map = unsafe {
Mmap::open_with_offset(&File::from_raw_fd(fd), Protection::Read, 0, size).unwrap()
};
let xkb_keymap = {
unsafe {
(XKBH.xkb_keymap_new_from_string)(
state.xkb_context,
map.ptr() as *const _,
ffi::xkb_keymap_format::XKB_KEYMAP_FORMAT_TEXT_V1,
ffi::xkb_keymap_compile_flags::XKB_KEYMAP_COMPILE_NO_FLAGS
)
}
};
if xkb_keymap.is_null() {
panic!("Failed to load keymap!");
}
let xkb_state = unsafe {
(XKBH.xkb_state_new)(xkb_keymap)
};
state.xkb_keymap = xkb_keymap;
state.xkb_state = xkb_state;
}
}
impl Iterator for MappedKeyboard {
type Item = MappedKeyboardEvent;
fn next(&mut self) -> Option<MappedKeyboardEvent> {
use wayland_client::wayland::WaylandProtocolEvent;
use wayland_client::wayland::seat::WlKeyboardEvent;
loop {
match self.iter.next() {
None => return None,
Some(Event::Wayland(WaylandProtocolEvent::WlKeyboard(proxy, event))) => {
if proxy == self.wkb.id() {
match event {
WlKeyboardEvent::Keymap(_format, fd, size) => {
self.init(fd, size as usize);
continue
},
WlKeyboardEvent::Modifiers(_, mods_d, mods_la, mods_lo, group) => {
self.state.lock().unwrap().update_modifiers(mods_d,mods_la, mods_lo, group);
continue;
}
WlKeyboardEvent::Key(serial, time, key, keystate) => {
return Some(MappedKeyboardEvent::KeyEvent(KeyEvent {
keycode: key,
state: self.state.clone(),
time: time,
serial: serial,
keystate: keystate
}));
}
_ => return Some(MappedKeyboardEvent::Other(event))
}
} else {
continue
}
},
_ => continue
}
}
}
}