upgrade to rust alpha 1.0.0

src/keyboard.rs

@@ -0,0 +1,56 @@
+use std::collections::HashMap;
+
+use sdl2::keycode::KeyCode;
+
+
+pub struct KeyboardHandler {
+    pressed_keys: HashMap<KeyCode, bool>,
+    released_keys: HashMap<KeyCode, bool>,
+    held_keys: HashMap<KeyCode, bool>
+}
+
+impl KeyboardHandler {
+    pub fn new() -> KeyboardHandler {
+        KeyboardHandler {
+            pressed_keys: HashMap::new(),
+            released_keys: HashMap::new(),
+            held_keys: HashMap::new()
+        }
+    }
+
+    pub fn clear(&mut self) {
+        self.pressed_keys.clear();
+        self.released_keys.clear();
+    }
+
+    pub fn key_down(&mut self, keycode: KeyCode) {
+        self.pressed_keys.insert(keycode, true);
+        self.held_keys.insert(keycode, true);
+    }
+
+    pub fn key_up(&mut self, keycode: KeyCode) {
+        self.released_keys.insert(keycode, true);
+        self.held_keys.insert(keycode, false);
+    }
+
+    pub fn was_pressed(&self, keycode: KeyCode) -> bool {
+        match self.pressed_keys.get(&keycode) {
+            Some(state) => *state,
+            None => false
+        }
+    }
+
+    pub fn was_released(&self, keycode: KeyCode) -> bool {
+        match self.released_keys.get(&keycode) {
+            Some(state) => *state,
+            None => false
+        }
+    }
+
+    pub fn is_held(&self, keycode: KeyCode) -> bool {
+        match self.held_keys.get(&keycode) {
+            Some(state) => *state,
+            None => false
+        }
+    }
+}