rusty_keys/device/
device.rs

1use std::{mem, ptr, slice};
2use libc::c_int;
3use libc::{timeval, gettimeofday, input_event};
4use nix::unistd;
5use ffi::*;
6use {Result as Res};
7
8/// The virtual device.
9pub struct Device {
10	fd: c_int,
11}
12
13impl Device {
14	/// Wrap a file descriptor in a `Device`.
15	pub fn new(fd: c_int) -> Self {
16		Device {
17			fd: fd
18		}
19	}
20
21	#[doc(hidden)]
22	pub fn write(&mut self, kind: c_int, code: c_int, value: c_int) -> Res<()> {
23		let mut event = input_event {
24			time:  timeval { tv_sec: 0, tv_usec: 0 },
25			type_:  kind as u16,
26			code:  code as u16,
27			value: value as i32,
28		};
29
30		self.write_event(&mut event)
31	}
32
33	#[doc(hidden)]
34	pub fn write_event(&self, event: &mut input_event) -> Res<()> {
35		unsafe {
36			gettimeofday(&mut event.time, ptr::null_mut());
37
38			let ptr  = event as *const _ as *const u8;
39			let size = mem::size_of_val(event);
40
41			try!(unistd::write(self.fd, slice::from_raw_parts(ptr, size)));
42		}
43
44		Ok(())
45	}
46
47	/// Synchronize the device.
48	pub fn synchronize(&mut self) -> Res<()> {
49		self.write(EV_SYN, SYN_REPORT, 0)
50	}
51
52	/// Send an event.
53	pub fn send(&mut self, kind: c_int, code: c_int, value: i32) -> Res<()> {
54		self.write(kind, code, value)
55	}
56
57	/// Send a press event.
58	pub fn press(&mut self, kind: c_int, code: c_int) -> Res<()> {
59		self.write(kind, code, 1)
60	}
61
62	/// Send a release event.
63	pub fn release(&mut self, kind: c_int, code: c_int) -> Res<()> {
64		self.write(kind, code, 0)
65	}
66
67	/// Send a press and release event.
68	pub fn click(&mut self, kind: c_int, code: c_int) -> Res<()> {
69		try!(self.press(kind, code));
70		try!(self.release(kind, code));
71
72		Ok(())
73	}
74
75	/// Send a relative or absolute positioning event.
76	pub fn position(&mut self, kind: c_int, code: c_int, value: i32) -> Res<()> {
77		self.write(kind, code, value)
78	}
79}
80
81impl Drop for Device {
82	fn drop(&mut self) {
83		unsafe {
84			ui_dev_destroy(self.fd).unwrap();
85		}
86	}
87}
rusty_keys/device/device.rs

rusty_keys/device/
device.rs
