[common] rect intersection

src/common/haxe/ru/m/geom/Rectangle.hx

@@ -7,6 +7,10 @@ class Rectangle {
     public var height(default, default):Float;
     public var center(get, set):Point;
     public var direction(default, set):Direction;
+    public var left(get, null):Float;
+    public var right(get, null):Float;
+    public var top(get, null):Float;
+    public var bottom(get, null):Float;
 
     public function new(x:Float, y:Float, width:Float, height:Float) {
         this.x = x;
@@ -61,7 +65,39 @@ class Rectangle {
         return point.x >= x && point.y >= y && point.x <= width && point.y <= height;
     }
 
+    public function intersection(rect:Rectangle):Bool {
+        return !(rect.left > right ||
+                 rect.right < left ||
+                 rect.top > bottom ||
+                 rect.bottom < top);
+    }
+
+    public function lean(rect:Rectangle):Void {
+        var side = rect.getSide(direction);
+        if (direction.x != 0) {
+            x = side.point1.x - width * (direction.x + 1) / 2 - direction.x;
+        } else if (direction.y != 0) {
+            y = side.point1.y - height * (direction.y + 1) / 2 - direction.y;
+        }
+    }
+
     public function toString():String {
         return 'Rectangle{x=$x,y=$y,width=$width,height=$height}';
     }
+
+    function get_left():Float {
+        return x;
+    }
+
+    function get_right():Float {
+        return x + width;
+    }
+
+    function get_top():Float {
+        return y;
+    }
+
+    function get_bottom():Float {
+        return y + height;
+    }
 }