jay-compositor 1.15.0

The Jay compositor
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use crate::client::Client;
use crate::ifs::wl_surface::WlSurface;
use crate::leaks::Tracker;
use crate::object::Version;
use crate::wire::WpAlphaModifierSurfaceV1Id;
use crate::wire::wp_alpha_modifier_surface_v1::*;
use jay_proc::Object;
use std::rc::Rc;
use thiserror::Error;

#[derive(Object)]
pub struct WpAlphaModifierSurfaceV1 {
    id: WpAlphaModifierSurfaceV1Id,
    version: Version,
    client: Rc<Client>,
    surface: Rc<WlSurface>,
    pub tracker: Tracker<Self>,
}

impl WpAlphaModifierSurfaceV1 {
    pub fn new(id: WpAlphaModifierSurfaceV1Id, surface: &Rc<WlSurface>, version: Version) -> Self {
        Self {
            id,
            version,
            client: surface.client.clone(),
            surface: surface.clone(),
            tracker: Default::default(),
        }
    }

    pub fn install(self: &Rc<Self>) -> Result<(), WpAlphaModifierSurfaceV1Error> {
        if self.surface.alpha_modifier.is_some() {
            return Err(WpAlphaModifierSurfaceV1Error::Exists);
        }
        self.surface.alpha_modifier.set(Some(self.clone()));
        Ok(())
    }
}

impl WpAlphaModifierSurfaceV1RequestHandler for WpAlphaModifierSurfaceV1 {
    type Error = WpAlphaModifierSurfaceV1Error;

    fn destroy(&self, _req: Destroy, _slf: &Rc<Self>) -> Result<(), Self::Error> {
        self.surface.alpha_modifier.take();
        self.surface.pending.borrow_mut().alpha_multiplier = Some(None);
        self.client.remove_obj(self);
        Ok(())
    }

    fn set_multiplier(&self, req: SetMultiplier, _slf: &Rc<Self>) -> Result<(), Self::Error> {
        let multiplier = if req.factor == u32::MAX {
            None
        } else {
            Some(((req.factor as f64) / (u32::MAX as f64)) as f32)
        };
        self.surface.pending.borrow_mut().alpha_multiplier = Some(multiplier);
        Ok(())
    }
}

#[derive(Debug, Error)]
pub enum WpAlphaModifierSurfaceV1Error {
    #[error("The surface already has an alpha modifier extension attached")]
    Exists,
}