feat: make end_frame method to return removed ids to the caller (#17)

Author: antouhou

Cargo.toml

@@ -23,7 +23,6 @@ serde = { version = "1.0.219", features = ["derive"], optional = true }
 
 [dev-dependencies]
 grafo = "0.9"
-#grafo = { path = "../grafo" }
 winit = "0.30"
 futures = "0.3"
 env_logger = "0.11"

src/lib.rs

@@ -57,8 +57,9 @@
 //!     let inner_size = state.inner_size();
 //! }
 //!
+//! let mut remove_ids = vec![];
 //! // Optional: going to remove all states that were not accessed during the current frame
-//! text_manager.end_frame();
+//! text_manager.end_frame(&mut remove_ids);
 //! ```
 
 mod action;

src/text_manager.rs

@@ -152,6 +152,7 @@ impl<TMetadata> TextManager<TMetadata> {
     /// Utility to do some simple garbage collection of text states if you don't want
     /// to implement a usage tracker yourself. Call this at the end of each frame, and this will
     /// remove any text states not marked as accessed since the last call to `start_frame`.
+    /// Accepts a mutable vector to which it will append the IDs of removed text states.
     ///
     /// This helps prevent memory leaks when text states are no longer needed.
     ///
@@ -161,13 +162,19 @@ impl<TMetadata> TextManager<TMetadata> {
     ///
     /// let mut manager: TextManager<()> = TextManager::new();
     ///
+    /// let mut removed_ids = Vec::new();
     /// // At the end of each frame
-    /// manager.end_frame();
+    /// manager.end_frame(&mut removed_ids);
     /// ```
-    pub fn end_frame(&mut self) {
+    pub fn end_frame(&mut self, removed_ids: &mut Vec<Id>) {
         let accessed_states = self.text_context.usage_tracker.accessed_states();
-        self.text_states
-            .retain(|id, _| accessed_states.contains(id));
+        self.text_states.retain(|id, _| {
+            let accessed = accessed_states.contains(id);
+            if !accessed {
+                removed_ids.push(*id);
+            }
+            accessed
+        });
     }
 
     /// Sets the global scale factor used for shaping and rasterization.