fn handle_event()

in src/platform_impl/web/event_loop/runner.rs [397:424]

• 19 lines of code
• 5 McCabe index (conditional complexity)

    fn handle_event(&self, event: Event<'static, T>, control: &mut root::ControlFlow) {
        if self.is_closed() {
            *control = root::ControlFlow::Exit;
        }
        match *self.0.runner.borrow_mut() {
            RunnerEnum::Running(ref mut runner) => {
                runner.handle_single_event(event, control);
            }
            // If an event is being handled without a runner somehow, add it to the event queue so
            // it will eventually be processed
            RunnerEnum::Pending => self.0.events.borrow_mut().push_back(event),
            // If the Runner has been destroyed, there is nothing to do.
            RunnerEnum::Destroyed => return,
        }

        let is_closed = *control == root::ControlFlow::Exit;

        // Don't take events out of the queue if the loop is closed or the runner doesn't exist
        // If the runner doesn't exist and this method recurses, it will recurse infinitely
        if !is_closed && self.0.runner.borrow().maybe_runner().is_some() {
            // Take an event out of the queue and handle it
            // Make sure not to let the borrow_mut live during the next handle_event
            let event = { self.0.events.borrow_mut().pop_front() };
            if let Some(event) = event {
                self.handle_event(event, control);
            }
        }
    }