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use crate::interface::Interface;
use crate::object::{Object, ObjectId};
use crate::wire::Message;

#[derive(Debug)]
pub struct BadMessage;

#[derive(Debug)]
pub struct WrongObject;

/// A Wayland object proxy.
///
/// This trait is implemented automatically for generated proxies, do not implement it yourself.
pub trait Proxy: TryFrom<Object, Error = WrongObject> + Copy {
    type Event: TryFrom<Message, Error = BadMessage>;

    const INTERFACE: &'static Interface;

    #[doc(hidden)]
    fn new(id: ObjectId, version: u32) -> Self;

    fn id(&self) -> ObjectId;

    fn version(&self) -> u32;
}

impl<P: Proxy> From<P> for Object {
    fn from(value: P) -> Self {
        Self {
            id: value.id(),
            interface: P::INTERFACE,
            version: value.version(),
        }
    }
}

impl<P: Proxy> From<P> for ObjectId {
    fn from(value: P) -> Self {
        value.id()
    }
}