Implement Item#intersects(item)

src/path/PathItem.js

@@ -181,6 +181,22 @@ var PathItem = Item.extend(/** @lends PathItem# */{
         return locations;
     },
 
+    intersects: function(item, _matrix) {
+        if (!(item instanceof Item))
+            return false;
+        var other = item instanceof PathItem
+                ? item
+                // Create a temporary rectangular path item to check against.
+                : new Path.Rectangle({
+                    rectangle: item.getInternalBounds(),
+                    insert: false
+                });
+        // TODO: Optimize getIntersections(): We don't need all intersections
+        // when we're just curious about whether they intersect or not. Pass on
+        // an argument that let's it bail out after the first intersection.
+        return this.getIntersections(other, _matrix || item._matrix).length > 0;
+    },
+
     /**
      * The path's geometry, formatted as SVG style path data.
      *