Add rectangle containment check for points.

src/geometry.rs

@@ -50,11 +50,16 @@ impl Rect {
         Rect::new(x as usize, y as usize, width as usize, height as usize)
     }
 
-    /// Returns true if this overlaps with other
+    /// Returns `true` if this overlaps with `other`
     pub fn intersect(&self, other: &Rect) -> bool {
         self.x1 <= other.x2 && self.x2 >= other.x1 && self.y1 <= other.y2 && self.y2 >= other.y1
     }
 
+    /// Returns `true` if this contains `point`
+    pub fn contains(self, point: &Point) -> bool {
+        point.x > self.x1 && point.x < self.x2 && point.y > self.y1 && point.y < self.y2
+    }
+
     pub fn center(&self) -> Point {
         Point::new((self.x1 + self.x2) / 2, (self.y1 + self.y2) / 2)
     }
@@ -114,6 +119,18 @@ mod tests {
         assert!(rect1.intersect(&rect2));
     }
 
+    #[test]
+    fn test_contains() {
+        let rect = Rect::new(10, 10, 5, 5);
+        assert!(rect.contains(&rect.center()));
+        let p = Point::new(5, 5);
+        assert!(!rect.contains(&p));
+        let p = Point::new(10, 10);
+        assert!(!rect.contains(&p));
+        let p = Point::new(11, 11);
+        assert!(rect.contains(&p));
+    }
+
     #[test]
     fn test_size() {
         let rect1 = Rect::new(10, 10, 40, 30);