user-idle 0.6.0

use std::{mem::size_of, ptr::addr_of_mut, time::Duration};

use windows_sys::Win32::{
    System::SystemInformation::GetTickCount,
    UI::Input::KeyboardAndMouse::{GetLastInputInfo, LASTINPUTINFO},
};

use crate::error::Error;

// Based on https://bitbucket.org/pidgin/main/src/8066acc5ed9306c5a53da8f66f50fb5cf38782c7/pidgin/win32/gtkwin32dep.c#lines-597

pub fn get_idle_time() -> Result<Duration, Error> {
    let now = unsafe { GetTickCount() };

    let mut last_input_info = LASTINPUTINFO {
        cbSize: size_of::<LASTINPUTINFO>() as u32,
        dwTime: 0,
    };

    if unsafe { GetLastInputInfo(addr_of_mut!(last_input_info)) } == 0 {
        Err(Error::new("GetLastInputInfo failed"))
    } else {
        Ok(Duration::from_millis(u64::from(
            now - last_input_info.dwTime,
        )))
    }
}