Intersects method for bounds.

src/ol/UnreferencedBounds.js

@@ -105,3 +105,26 @@ ol.UnreferencedBounds.prototype.getWidth = function() {
 ol.UnreferencedBounds.prototype.getHeight = function() {
     return this.maxY_ - this.minY_;
 };
+
+/**
+ * Determine if this bounds intersects the target bounds (bounds that only
+ * touch are considered intersecting).
+ *
+ * @param {ol.UnreferencedBounds} bounds Target bounds.
+ * @return {boolean} The provided bounds intersects this bounds.
+ */
+ol.UnreferencedBounds.prototype.intersects = function(bounds) {
+    return !(
+        // this is left
+        (this.minX_ > bounds.getMaxX()) ||
+
+        // this is right
+        (this.maxX_ < bounds.getMinX()) ||
+        
+        // this is above
+        (this.minY_ > bounds.getMaxY()) ||
+        
+        // this is below
+        (this.maxY_ < bounds.getMinY())
+    );
+};

test/spec/ol/UnreferencedBounds.test.js

@@ -18,4 +18,40 @@ describe("ol.UnreferencedBounds", function() {
         });
     });
 
+    describe("intersection", function() {
+
+        var aBounds = new ol.UnreferencedBounds(-180, -90, 180, 90);
+
+        it("works when within", function() {
+            var bBounds = new ol.UnreferencedBounds(-20, -10, 20, 10);
+            expect(aBounds.intersects(bBounds)).toBe(true);
+            expect(bBounds.intersects(aBounds)).toBe(true);
+        });
+
+        it("works when contains", function() {
+            var bBounds = new ol.UnreferencedBounds(-181, -91, 181, 91);
+            expect(aBounds.intersects(bBounds)).toBe(true);
+            expect(bBounds.intersects(aBounds)).toBe(true);
+        });
+
+        it("works when total intersect", function() {
+            var bBounds = new ol.UnreferencedBounds(-185, -100, 20, 50);
+            expect(aBounds.intersects(bBounds)).toBe(true);
+            expect(bBounds.intersects(aBounds)).toBe(true);
+        });
+
+        it("works when borders intersect", function() {
+            var bBounds = new ol.UnreferencedBounds(-360, -180, -180, -90);
+            expect(aBounds.intersects(bBounds)).toBe(true);
+            expect(bBounds.intersects(aBounds)).toBe(true);
+        });
+
+        it("works when no intersect", function() {
+            var bBounds = new ol.UnreferencedBounds(-360, -180, -185, -95);
+            expect(aBounds.intersects(bBounds)).toBe(false);
+            expect(bBounds.intersects(aBounds)).toBe(false);
+        });
+
+    });
+
 });