111 lines
3.8 KiB
Rust
111 lines
3.8 KiB
Rust
use std::time::{Duration, Instant};
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const HIDE_DELAY: Duration = Duration::from_secs(5);
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const SHOW_DELAY: Duration = Duration::from_secs(3);
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/// Backend-owned visibility survives destruction of the scene webview.
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pub(super) struct Visibility {
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pub show_local: bool,
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pending: Option<(bool, Instant)>,
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}
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impl Default for Visibility {
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fn default() -> Self {
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Self {
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show_local: true,
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pending: None,
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}
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}
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}
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impl Visibility {
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pub fn window_open(&self, has_friends: bool) -> bool {
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self.show_local || has_friends
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}
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pub fn update(&mut self, hide_when_alone: bool, has_friends: bool, now: Instant) {
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if !hide_when_alone {
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self.show_local = true;
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self.pending = None;
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return;
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}
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if self.show_local == has_friends {
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self.pending = None;
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return;
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}
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let (target, deadline) = *self.pending.get_or_insert_with(|| {
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(
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has_friends,
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now + if has_friends { SHOW_DELAY } else { HIDE_DELAY },
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)
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});
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if now >= deadline {
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self.show_local = target;
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self.pending = None;
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}
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn local_puppet_hides_after_five_seconds_and_return_delays_only_local_puppet() {
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let now = Instant::now();
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let mut visibility = Visibility::default();
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visibility.update(true, false, now);
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visibility.update(true, false, now + HIDE_DELAY - Duration::from_millis(1));
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assert!(visibility.show_local);
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visibility.update(true, false, now + HIDE_DELAY);
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assert!(!visibility.show_local);
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assert!(!visibility.window_open(false));
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let returned = now + HIDE_DELAY;
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visibility.update(true, true, returned);
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assert!(!visibility.show_local);
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assert!(visibility.window_open(true));
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visibility.update(true, true, returned + SHOW_DELAY);
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assert!(visibility.show_local);
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}
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#[test]
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fn reconnect_cancels_hide_and_disconnect_cancels_show() {
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let now = Instant::now();
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let mut visibility = Visibility::default();
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visibility.update(true, false, now);
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visibility.update(true, true, now + Duration::from_secs(4));
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visibility.update(true, false, now + Duration::from_secs(5));
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assert!(visibility.show_local);
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visibility.update(true, false, now + Duration::from_secs(10));
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assert!(!visibility.show_local);
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visibility.update(true, true, now + Duration::from_secs(11));
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visibility.update(true, false, now + Duration::from_secs(12));
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visibility.update(true, true, now + Duration::from_secs(14));
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assert!(!visibility.show_local);
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visibility.update(true, true, now + Duration::from_secs(17));
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assert!(visibility.show_local);
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}
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#[test]
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fn disabling_setting_restores_local_and_cancels_pending_timer() {
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let now = Instant::now();
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let mut visibility = Visibility::default();
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visibility.update(true, false, now);
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visibility.update(true, false, now + HIDE_DELAY);
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visibility.update(false, false, now + HIDE_DELAY);
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assert!(visibility.show_local);
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visibility.update(true, false, now + HIDE_DELAY);
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visibility.update(false, false, now + HIDE_DELAY + Duration::from_secs(1));
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let restarted = now + HIDE_DELAY + Duration::from_secs(2);
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visibility.update(true, false, restarted);
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visibility.update(
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true,
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false,
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restarted + HIDE_DELAY - Duration::from_millis(1),
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);
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assert!(visibility.show_local);
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visibility.update(true, false, restarted + HIDE_DELAY);
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assert!(!visibility.show_local);
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}
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}
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