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#![deny(missing_docs)]
#![doc(html_root_url = "https://docs.rs/input-linux/0.6.0/")]
#![cfg_attr(feature = "dox", feature(doc_cfg))]

//! Userspace bindings to the Linux evdev and uinput subsystems.
//!
//! Start by looking at the [`EvdevHandle`] and [`UInputHandle`] types.

pub use input_linux_sys as sys;
#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize, };

#[macro_use]
mod macros;

mod kinds;
pub use crate::kinds::*;

mod time;
pub use crate::time::EventTime;

mod events;
pub use crate::events::*;

mod keys;
pub use crate::keys::Key;

pub mod evdev;
pub use crate::evdev::EvdevHandle;

pub mod uinput;
pub use crate::uinput::UInputHandle;

pub mod enum_iterator;

pub mod bitmask;
pub use crate::bitmask::Bitmask;

#[cfg(feature = "codec")]
#[cfg_attr(feature = "dox", doc(cfg(feature = "codec")))]
mod codec;

#[cfg(feature = "codec")]
pub use crate::codec::EventCodec;

#[repr(C)]
#[derive(Copy, Clone, Default, PartialOrd, Ord, PartialEq, Eq, Hash, Debug)]
#[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
/// Identifies an input device.
pub struct InputId {
	/// Identifies the bus where the input device is found, see `sys::BUS_*`
	pub bustype: u16,
	/// The vendor ID of the input device.
	pub vendor: u16,
	/// The product ID of the input device.
	pub product: u16,
	/// The version of the input device.
	pub version: u16,
}

impl<'a> From<&'a sys::input_id> for &'a InputId {
	fn from(id: &'a sys::input_id) -> Self {
		let raw = id as *const _ as *const _;
		unsafe { &*raw }
	}
}

impl<'a> From<&'a InputId> for &'a sys::input_id {
	fn from(id: &'a InputId) -> Self {
		let raw = id as *const _ as *const _;
		unsafe { &*raw }
	}
}

impl From<sys::input_id> for InputId {
	fn from(id: sys::input_id) -> Self {
		*<&InputId>::from(&id)
	}
}

impl From<InputId> for sys::input_id {
	fn from(id: InputId) -> Self {
		*<&sys::input_id>::from(&id)
	}
}

#[repr(C)]
#[derive(Copy, Clone, PartialOrd, Ord, PartialEq, Eq, Hash, Debug)]
#[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
/// A descriptor used to create a virtual uinput absolute axis.
pub struct AbsoluteInfoSetup {
	/// The axis to attach the `AbsoluteInfo` constraints to.
	pub axis: AbsoluteAxis,
	/// Describes the capabilities of the absolute axis.
	pub info: AbsoluteInfo,
}

impl<'a> From<&'a AbsoluteInfoSetup> for &'a sys::uinput_abs_setup {
	fn from(info: &'a AbsoluteInfoSetup) -> Self {
		let raw = info as *const _ as *const _;
		unsafe { &*raw }
	}
}

impl From<AbsoluteInfoSetup> for sys::uinput_abs_setup {
	fn from(info: AbsoluteInfoSetup) -> Self {
		use std::mem;
		unsafe {
			mem::transmute(info)
		}
	}
}

#[repr(C)]
#[derive(Copy, Clone, Default, PartialOrd, Ord, PartialEq, Eq, Hash, Debug)]
#[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
/// Describes the capabilities and constraints of an input device's absolute axis.
pub struct AbsoluteInfo {
	/// latest reported value for the axis
	pub value: i32,
	/// specifies minimum value for the axis
	pub minimum: i32,
	/// specifies maximum value for the axis
	pub maximum: i32,
	/// specifies fuzz value that is used to filter noise from the event stream
	pub fuzz: i32,
	/// values that are within this value will be discarded by joydev interface and reported as 0 instead
	pub flat: i32,
	/// specifies resolution for the values reported for the axis
	///
	/// Resolution for main axes (ABS_X, ABS_Y, ABS_Z) is reported in units per
	/// millimeter (units/mm), resolution for rotational axes (ABS_RX, ABS_RY,
	/// ABS_RZ) is reported in units per radian.
	pub resolution: i32,
}

impl<'a> From<&'a sys::input_absinfo> for &'a AbsoluteInfo {
	fn from(info: &'a sys::input_absinfo) -> Self {
		let raw = info as *const _ as *const _;
		unsafe { &*raw }
	}
}

impl<'a> From<&'a AbsoluteInfo> for &'a sys::input_absinfo {
	fn from(info: &'a AbsoluteInfo) -> Self {
		let raw = info as *const _ as *const _;
		unsafe { &*raw }
	}
}

impl From<sys::input_absinfo> for AbsoluteInfo {
	fn from(info: sys::input_absinfo) -> Self {
		*<&AbsoluteInfo>::from(&info)
	}
}

impl From<AbsoluteInfo> for sys::input_absinfo {
	fn from(info: AbsoluteInfo) -> Self {
		*<&sys::input_absinfo>::from(&info)
	}
}