jay-compositor 1.15.0

The Jay compositor
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use crate::ei::ei_client::EiClient;
use crate::ei::ei_client::EiClientError;
use crate::ei::ei_ifs::ei_device::EiDevice;
use crate::ei::ei_ifs::ei_device::EiDeviceInterface;
use crate::ei::ei_object::EiObject;
use crate::ei::ei_object::EiVersion;
use crate::fixed::Fixed;
use crate::leaks::Tracker;
use crate::wire_ei::EiTouchscreenId;
use crate::wire_ei::ei_touchscreen::ClientCancel;
use crate::wire_ei::ei_touchscreen::ClientDown;
use crate::wire_ei::ei_touchscreen::ClientMotion;
use crate::wire_ei::ei_touchscreen::ClientUp;
use crate::wire_ei::ei_touchscreen::EiTouchscreenRequestHandler;
use crate::wire_ei::ei_touchscreen::Release;
use crate::wire_ei::ei_touchscreen::ServerCancel;
use crate::wire_ei::ei_touchscreen::ServerDown;
use crate::wire_ei::ei_touchscreen::ServerMotion;
use crate::wire_ei::ei_touchscreen::ServerUp;
use hashbrown::hash_map::Entry;
use jay_proc::jay_clone;
use std::rc::Rc;
use thiserror::Error;

pub struct EiTouchscreen {
    id: EiTouchscreenId,
    client: Rc<EiClient>,
    tracker: Tracker<Self>,
    version: EiVersion,
    pub device: Rc<EiDevice>,
}

#[jay_clone(Copy)]
#[derive(Debug)]
pub enum TouchChange {
    Down(f32, f32),
    Motion(f32, f32),
    Up,
    Cancel,
}

ei_device_interface!(EiTouchscreen, ei_touchscreen, touchscreen);

impl EiTouchscreen {
    pub fn send_down(&self, touchid: u32, x: Fixed, y: Fixed) {
        self.client.event(ServerDown {
            self_id: self.id,
            touchid,
            x: x.to_f32(),
            y: y.to_f32(),
        });
    }

    pub fn send_motion(&self, touchid: u32, x: Fixed, y: Fixed) {
        self.client.event(ServerMotion {
            self_id: self.id,
            touchid,
            x: x.to_f32(),
            y: y.to_f32(),
        });
    }

    pub fn send_up(&self, touchid: u32) {
        self.client.event(ServerUp {
            self_id: self.id,
            touchid,
        });
    }

    pub fn send_cancel(&self, touchid: u32) {
        self.client.event(ServerCancel {
            self_id: self.id,
            touchid,
        });
    }

    fn set_client_event(&self, touchid: u32, event: TouchChange) -> Result<(), EiTouchscreenError> {
        match self.device.touch_changes.lock().entry(touchid) {
            Entry::Occupied(mut o) => {
                use TouchChange::*;
                match (o.get(), event) {
                    (Motion(_, _), Motion(_, _))
                    | (Down(_, _), Down(_, _))
                    | (Up, Up)
                    | (Cancel, Cancel) => {
                        o.insert(event);
                        Ok(())
                    }
                    _ => Err(EiTouchscreenError::InvalidEventCombination),
                }
            }
            Entry::Vacant(v) => {
                v.insert(event);
                Ok(())
            }
        }
    }
}

impl EiTouchscreenRequestHandler for EiTouchscreen {
    type Error = EiTouchscreenError;

    fn release(&self, _req: Release, _slf: &Rc<Self>) -> Result<(), Self::Error> {
        self.destroy()?;
        Ok(())
    }

    fn client_down(&self, req: ClientDown, _slf: &Rc<Self>) -> Result<(), Self::Error> {
        self.set_client_event(req.touchid, TouchChange::Down(req.x, req.y))
    }

    fn client_motion(&self, req: ClientMotion, _slf: &Rc<Self>) -> Result<(), Self::Error> {
        self.set_client_event(req.touchid, TouchChange::Motion(req.x, req.y))
    }

    fn client_up(&self, req: ClientUp, _slf: &Rc<Self>) -> Result<(), Self::Error> {
        self.set_client_event(req.touchid, TouchChange::Up)
    }

    fn client_cancel(&self, req: ClientCancel, _slf: &Rc<Self>) -> Result<(), Self::Error> {
        self.set_client_event(req.touchid, TouchChange::Cancel)
    }
}

ei_object_base! {
    self = EiTouchscreen;
    version = self.version;
}

impl EiObject for EiTouchscreen {}

#[derive(Debug, Error)]
pub enum EiTouchscreenError {
    #[error(transparent)]
    EiClientError(Box<EiClientError>),
    #[error("Touch frame contains an invalid combination of events")]
    InvalidEventCombination,
}
efrom!(EiTouchscreenError, EiClientError);