87 lines
1.8 KiB
Rust
87 lines
1.8 KiB
Rust
use std::{mem, ptr, slice};
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use libc::{timeval, gettimeofday, input_event, c_int};
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use nix::unistd;
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use ffi::*;
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use {Result as Res};
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/// The virtual device.
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pub struct Device {
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fd: c_int,
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}
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impl Device {
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/// Wrap a file descriptor in a `Device`.
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pub fn new(fd: c_int) -> Self {
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Device {
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fd: fd
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}
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}
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#[doc(hidden)]
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pub fn write(&self, kind: c_int, code: c_int, value: c_int) -> Res<()> {
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let mut event = input_event {
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time: timeval { tv_sec: 0, tv_usec: 0 },
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type_: kind as u16,
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code: code as u16,
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value: value as i32,
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};
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self.write_event(&mut event)
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}
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#[doc(hidden)]
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pub fn write_event(&self, event: &mut input_event) -> Res<()> {
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unsafe {
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gettimeofday(&mut event.time, ptr::null_mut());
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let ptr = event as *const _ as *const u8;
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let size = mem::size_of_val(event);
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try!(unistd::write(self.fd, slice::from_raw_parts(ptr, size)));
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}
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Ok(())
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}
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/// Synchronize the device.
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pub fn synchronize(&self) -> Res<()> {
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self.write(EV_SYN, SYN_REPORT, 0)
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}
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/// Send an event.
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pub fn send(&self, kind: c_int, code: c_int, value: i32) -> Res<()> {
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self.write(kind, code, value)
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}
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/// Send a press event.
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pub fn press(&self, kind: c_int, code: c_int) -> Res<()> {
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self.write(kind, code, 1)
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}
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/// Send a release event.
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pub fn release(&self, kind: c_int, code: c_int) -> Res<()> {
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self.write(kind, code, 0)
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}
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/// Send a press and release event.
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pub fn click(&self, kind: c_int, code: c_int) -> Res<()> {
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try!(self.press(kind, code));
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try!(self.release(kind, code));
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Ok(())
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}
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/// Send a relative or absolute positioning event.
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pub fn position(&self, kind: c_int, code: c_int, value: i32) -> Res<()> {
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self.write(kind, code, value)
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}
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}
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impl Drop for Device {
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fn drop(&mut self) {
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unsafe {
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ui_dev_destroy(self.fd).unwrap();
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}
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}
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}
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