Function request_animation_frame

crates/wasm/src/browser_module.rs:114–147

(func: ArgCallable, vm: &VirtualMachine)

    #[pyfunction]
    fn request_animation_frame(func: ArgCallable, vm: &VirtualMachine) -> PyResult {
        use alloc::rc::Rc;
        use core::cell::RefCell;

        // this basic setup for request_animation_frame taken from:
        // https://rustwasm.github.io/wasm-bindgen/examples/request-animation-frame.html

        let f = Rc::new(RefCell::new(None));
        let g = f.clone();

        let weak_vm = weak_vm(vm);

        *g.borrow_mut() = Some(Closure::wrap(Box::new(move |time: f64| {
            let stored_vm = weak_vm
                .upgrade()
                .expect("that the vm is valid from inside of request_animation_frame");
            stored_vm.interp.enter(|vm| {
                let func = func.clone();
                let args = vec![vm.ctx.new_float(time).into()];
                let _ = func.invoke(args, vm);

                let closure = f.borrow_mut().take();
                drop(closure);
            })
        }) as Box<dyn Fn(f64)>));

        let id = window()
            .request_animation_frame(&js_sys::Function::from(
                g.borrow().as_ref().unwrap().as_ref().clone(),
            ))
            .map_err(|err| convert::js_py_typeerror(vm, err))?;

        Ok(vm.ctx.new_int(id).into())
    }

    #[pyfunction]
    fn cancel_animation_frame(id: i32, vm: &VirtualMachine) -> PyResult<()> {