From dcc1475a58acc83aa180f7d202bf069e214980ee Mon Sep 17 00:00:00 2001
From: HampusM <hampus@hampusmat.com>
Date: Thu, 17 Oct 2024 01:01:22 +0200
Subject: perf(engine): pre-populate key map

---
 engine/src/input.rs | 34 +++++++++++++++++++++++-----------
 1 file changed, 23 insertions(+), 11 deletions(-)

(limited to 'engine/src/input.rs')

diff --git a/engine/src/input.rs b/engine/src/input.rs
index c8ba16a..e292b76 100644
--- a/engine/src/input.rs
+++ b/engine/src/input.rs
@@ -15,7 +15,7 @@ mod reexports
 
 pub use reexports::*;
 
-#[derive(Debug, Clone, Default, Sole)]
+#[derive(Debug, Clone, Sole)]
 pub struct Keys
 {
     map: HashMap<Key, KeyState>,
@@ -26,33 +26,45 @@ impl Keys
     #[must_use]
     pub fn new() -> Self
     {
-        Self::default()
+        Self {
+            map: Key::KEYS
+                .iter()
+                .map(|key| (*key, KeyState::Released))
+                .collect(),
+        }
     }
 
     #[must_use]
     pub fn get_key_state(&self, key: Key) -> KeyState
     {
-        self.map.get(&key).copied().unwrap_or(KeyState::Released)
+        self.map.get(&key).copied().expect("Key not in key map")
     }
 
-    pub fn set_key_state(&mut self, key: Key, key_state: KeyState)
+    pub fn set_key_state(&mut self, key: Key, new_key_state: KeyState)
     {
-        if matches!(key_state, KeyState::Released) {
-            self.map.remove(&key);
+        if matches!(new_key_state, KeyState::Repeat) {
             return;
         }
 
-        if matches!(key_state, KeyState::Repeat) {
-            return;
-        }
+        let key_state = self.map.get_mut(&key).expect("Key not in key map");
 
-        self.map.insert(key, key_state);
+        *key_state = new_key_state;
     }
 
     #[must_use]
     pub fn is_anything_pressed(&self) -> bool
     {
-        !self.map.is_empty()
+        self.map
+            .values()
+            .any(|key_state| matches!(key_state, KeyState::Pressed))
+    }
+}
+
+impl Default for Keys
+{
+    fn default() -> Self
+    {
+        Self::new()
     }
 }
 
-- 
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