show input conflicts in binding menu

src/input.rs

@@ -140,6 +140,17 @@ impl Input {
 				let x = binding_text_x + 10 + d.measure_text(&trigger, 20);
 				let modifiers = format!("{:?}", binding.modifiers);
 				d.draw_text(&modifiers, x, y + 5, 20, Color::LIGHTBLUE);
+				let conflicts = conflicts(&self.bindings, binding, action);
+				if !conflicts.is_empty() {
+					let x = x + 10 + d.measure_text(&modifiers, 20);
+					d.draw_text(
+						&format!("also used by: {conflicts:?}"),
+						x,
+						y + 5,
+						20,
+						Color::ORANGERED,
+					);
+				}
 				y += 32;
 			}
 			if text_button(d, &globals.mouse, buttons_x, y, 130, "add binding") {
@@ -151,15 +162,15 @@ impl Input {
 
 		if let Some((action, binding_index, edit_state)) = &mut self.editing_binding {
 			globals.mouse.update(d);
-			let border = screen_centered_rect(d, 368, 128);
+			let border = screen_centered_rect(d, 408, 128);
 			d.draw_rectangle_rec(border, BG_LIGHT);
-			let bounds = screen_centered_rect(d, 360, 120);
+			let bounds = screen_centered_rect(d, 400, 120);
 			d.draw_rectangle_rec(bounds, BG_DARK);
 			let x = bounds.x as i32;
 			let y = bounds.y as i32;
 			d.draw_text(
 				&format!("editing binding for {action:?}"),
-				x + 5,
+				x + 10,
 				y + 5,
 				20,
 				Color::WHITE,
@@ -217,6 +228,17 @@ impl Input {
 				};
 				let text = format!("{:?} + {:?}", b.modifiers, b.trigger);
 				d.draw_text(&text, x + 5, y + 5, 20, colour);
+
+				let conflicts = conflicts(&self.bindings, b, *action);
+				if !conflicts.is_empty() {
+					d.draw_text(
+						&format!("conflicts: {conflicts:?}"),
+						x + 200,
+						y + 40,
+						20,
+						Color::ORANGERED,
+					);
+				}
 			}
 			if text_button(d, &globals.mouse, ok_btn_x, ok_btn_y, ok_btn_width, "ok") {
 				if let BindingEdit::Releasing(binding) = edit_state {
@@ -273,6 +295,29 @@ impl Input {
 	}
 }
 
+fn conflicts(
+	bindings: &[Vec<Binding>; ActionId::SIZE],
+	search: &Binding,
+	skip: ActionId,
+) -> Vec<ActionId> {
+	let mut matches = Vec::new();
+
+	for i in 0..ActionId::SIZE {
+		if skip as usize == i {
+			continue;
+		}
+		let bindings = &bindings[i];
+		for binding in bindings {
+			if binding == search {
+				matches.push(ActionId::from_usize(i).unwrap());
+				break;
+			}
+		}
+	}
+
+	matches
+}
+
 impl ActionId {
 	pub const SIZE: usize = Self::_EnumSize as usize;
 
@@ -285,7 +330,7 @@ impl ActionId {
 	}
 }
 
-#[derive(Clone, Debug, Serialize, Deserialize)]
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
 pub struct Binding {
 	modifiers: Vec<Button>,
 	trigger: Button,