jay-compositor 1.15.0

The Jay compositor
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use crate::utils::clonecell::CloneCell;
use crate::utils::syncqueue::SyncQueue;
use derivative::Derivative;
use std::fmt::Debug;
use std::fmt::Formatter;
use std::rc::Rc;

#[derive(Derivative)]
#[derivative(Default(bound = ""))]
pub struct OnChange<T> {
    pub on_change: CloneCell<Option<Rc<dyn Fn()>>>,
    pub events: SyncQueue<T>,
}

impl<T> OnChange<T> {
    pub fn clear(&self) {
        self.on_change.take();
        self.events.take();
    }

    pub fn send_event(&self, event: T) {
        self.events.push(event);
        if let Some(cb) = self.on_change.get() {
            cb();
        }
    }
}

impl<T> Debug for OnChange<T> {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        match self.on_change.get() {
            None => f.write_str("None"),
            Some(_) => f.write_str("Some"),
        }
    }
}