Timer trait: add current_split_index

crates/livesplit-auto-splitting/src/timer.rs

@@ -30,6 +30,12 @@ pub trait Timer {
     fn undo_split(&mut self);
     /// Resets the timer.
     fn reset(&mut self);
+    /// Accesses the index of the split the attempt is currently on. If there's
+    /// no attempt in progress, `None` is returned instead. This returns an
+    /// index that is equal to the amount of segments when the attempt is
+    /// finished, but has not been reset. So you need to be careful when using
+    /// this value for indexing.
+    fn current_split_index(&self) -> Option<usize>;
     /// Sets the game time.
     fn set_game_time(&mut self, time: time::Duration);
     /// Pauses the game time. This does not pause the timer, only the automatic

crates/livesplit-auto-splitting/tests/sandboxing.rs

@@ -19,6 +19,9 @@ impl Timer for DummyTimer {
     fn skip_split(&mut self) {}
     fn undo_split(&mut self) {}
     fn reset(&mut self) {}
+    fn current_split_index(&self) -> Option<usize> {
+        None
+    }
     fn set_game_time(&mut self, _time: time::Duration) {}
     fn pause_game_time(&mut self) {}
     fn resume_game_time(&mut self) {}

src/auto_splitting/mod.rs

@@ -748,6 +748,10 @@ impl AutoSplitTimer for Timer {
         self.0.write().unwrap().reset(true)
     }
 
+    fn current_split_index(&self) -> Option<usize> {
+        self.0.read().unwrap().current_split_index()
+    }
+
     fn set_game_time(&mut self, time: time::Duration) {
         self.0.write().unwrap().set_game_time(time.into());
     }