1 files changed, 123 insertions, 0 deletions
diff --git a/src/input/binding.rs b/src/input/binding.rs
new file mode 100644
index 0000000..386fb66
--- /dev/null
+++ b/src/input/binding.rs
@@ -0,0 +1,123 @@
+//! Bindings module, which is a key combination that does something when pressed.
+
+use super::Button;
+use raylib::RaylibHandle;
+use serde::{Deserialize, Serialize};
+
+/// Binding struct, which holds any number of buttons (keyboard and mouse may be mixed, if desired)
+#[derive(Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
+pub struct Binding {
+    buttons: Vec<Button>,
+}
+
+impl Binding {
+    /// Create a new binding from a range of buttons. The button order does not matter, but at least
+    /// one button must be supplied.
+    pub fn new(buttons: Vec<Button>) -> Self {
+        if buttons.is_empty() {
+            panic!("Tried to create a binding without any keys.");
+        }
+
+        Self { buttons }
+    }
+
+    /// Returns `true` if only mouse buttons are present in this binding, otherwise false.
+    pub fn mouse_only(&self) -> bool {
+        for button in &self.buttons {
+            match button {
+                Button::Mouse(_) => continue,
+                _ => return false,
+            }
+        }
+
+        true
+    }
+
+    /// Returns `true` if only keyboard buttons are present in this binding, otherwise false.
+    pub fn keyboard_only(&self) -> bool {
+        for button in &self.buttons {
+            match button {
+                Button::Scancode(_) | Button::Text(_) => continue,
+                _ => return false,
+            }
+        }
+
+        true
+    }
+
+    /// Returns `true` if at least one mouse button is required for this binding to work.
+    pub fn has_mouse_component(&self) -> bool {
+        self.buttons.iter().any(|b| {
+            if let Button::Mouse(_) = b {
+                true
+            } else {
+                false
+            }
+        })
+    }
+
+    /// Returns `true` if at least one keyboard button is required for this binding to work.
+    pub fn has_keyboard_component(&self) -> bool {
+        self.buttons.iter().any(|b| match b {
+            Button::Scancode(_) | Button::Text(_) => true,
+            _ => false,
+        })
+    }
+
+    /// Checks if this binding was pressed this frame. Heavily dependent on input struct working
+    /// correctly.
+    pub(super) fn is_pressed(
+        &self,
+        allow_mouse: bool,
+        allow_keyboard: bool,
+        text: &str,
+        rl: &RaylibHandle,
+    ) -> bool {
+        let mut distinct_press = false;
+        for button in &self.buttons {
+            match *button {
+                Button::Mouse(mouse_button) => {
+                    if !allow_mouse || !rl.is_mouse_button_down(mouse_button.into()) {
+                        return false;
+                    }
+
+                    /* Check if the button has been pressed in this frame exactly.
+                     * This prevents activating the same keybinding every frame
+                     * while the buttons are being held down.
+                     */
+                    if rl.is_mouse_button_pressed(mouse_button.into()) {
+                        distinct_press = true;
+                    }
+                }
+                Button::Scancode(code) => {
+                    if !allow_keyboard || !rl.is_key_down(code.into()) {
+                        return false;
+                    }
+
+                    // Check the same as with the mouse button.
+                    if rl.is_key_pressed(code.into()) {
+                        distinct_press = true;
+                    }
+                }
+                Button::Text(c) => {
+                    if !allow_keyboard || !text.contains(c) {
+                        return false;
+                    }
+
+                    // Always distinct, since on triggering, the text is cleared.
+                    distinct_press = true;
+                }
+            }
+        }
+
+        distinct_press
+    }
+}
+
+impl From<Button> for Binding {
+    fn from(button: Button) -> Self {
+        Self {
+            buttons: vec![button],
+        }
+    }
+}