Rewrite in Rust

src/structs/number_renderer.rs

@@ -0,0 +1,76 @@
+use sfml::graphics::*;
+use sfml::system::Vector2f;
+use sfml::SfBox;
+
+pub struct NumberRenderer {
+	texture: SfBox<Texture>,
+	comma_rect: IntRect,
+	numeral_rects: [IntRect; 10],
+}
+
+impl NumberRenderer {
+	pub fn new(texture: SfBox<Texture>, comma_rect: IntRect, numeral_rects: [IntRect; 10]) -> Self {
+		Self {
+			texture,
+			comma_rect,
+			numeral_rects
+		}
+	}
+
+	pub fn default() -> Self {
+		Self::new(
+			Texture::from_file(&crate::texture("numerals")).unwrap(),
+			IntRect::new(134, 0, 10, 16),
+			[
+				IntRect::new(0, 0, 14, 16),
+				IntRect::new(14, 0, 8, 16),
+				IntRect::new(22, 0, 14, 16),
+				IntRect::new(36, 0, 14, 16),
+				IntRect::new(50, 0, 14, 16),
+				IntRect::new(64, 0, 14, 16),
+				IntRect::new(78, 0, 14, 16),
+				IntRect::new(92, 0, 14, 16),
+				IntRect::new(106, 0, 14, 16),
+				IntRect::new(120, 0, 14, 16)
+			]
+		)
+	}
+
+	pub fn render(&self, window: &mut RenderWindow, number: u32, x: u32, y: u32) {
+		let number_string = number.to_string();
+		let get_numeral_rect = |numeral: char| self.numeral_rects[numeral.to_digit(10).unwrap() as usize];
+		let mut numeral_position = Vector2f::new({
+			let numeral = number_string.chars().last().unwrap();
+			let numeral_rect = get_numeral_rect(numeral);
+			x as f32 - numeral_rect.width as f32
+		}, y as f32);
+		let digits = number_string.len();
+		let mut sprite = Sprite::new();
+		sprite.set_texture(&self.texture, false);
+		// can't reverse .chars() directly since it doesn't implement std::iter::DoubleEndedIterator
+		// Instead, we must collect it to a Vec then iterate over that.
+		// For more info, see https://users.rust-lang.org/t/43401/2
+		for (i, numeral) in number_string.chars().collect::<Vec<char>>().iter().enumerate().rev() {
+			let numeral_rect = get_numeral_rect(*numeral);
+			if (digits - i) % 3 == 1 && i != digits - 1 {
+				sprite.set_texture_rect(&self.comma_rect);
+				sprite.set_position(numeral_position);
+				window.draw(&sprite);
+				numeral_position.x -= numeral_rect.width as f32;
+			}
+			sprite.set_texture_rect(&numeral_rect);
+			sprite.set_position(numeral_position);
+			window.draw(&sprite);
+			if i == 0 {
+				break;
+			}
+			if (digits - i) % 3 == 0 {
+				numeral_position.x -= self.comma_rect.width as f32;
+				continue;
+			}
+			let numeral = number_string.as_bytes()[i - 1] as char;
+			let numeral_rect = get_numeral_rect(numeral);
+			numeral_position.x -= numeral_rect.width as f32;
+		}
+	}
+}