From b383e0ecb256641e736b187f7ddac64df8b4a314 Mon Sep 17 00:00:00 2001
From: Tim Schaub <tim.schaub@gmail.com>
Date: Sun, 19 Feb 2017 17:09:41 -0700
Subject: [PATCH] Add view.getMaxZoom() and view.getMinZoom()

---
 src/ol/view.js            | 20 ++++++++++++++++++++
 test/spec/ol/view.test.js | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+)

diff --git a/src/ol/view.js b/src/ol/view.js
index b83a2e28d4..7b6c206d21 100644
--- a/src/ol/view.js
+++ b/src/ol/view.js
@@ -528,6 +528,26 @@ ol.View.prototype.getMinResolution = function() {
 };
 
 
+/**
+ * Get the maximum zoom level for the view.
+ * @return {number} The maximum zoom level.
+ * @api
+ */
+ol.View.prototype.getMaxZoom = function() {
+  return /** @type {number} */ (this.getZoomForResolution(this.minResolution_));
+};
+
+
+/**
+ * Get the minimum zoom level for the view.
+ * @return {number} The minimum zoom level.
+ * @api
+ */
+ol.View.prototype.getMinZoom = function() {
+  return /** @type {number} */ (this.getZoomForResolution(this.maxResolution_));
+};
+
+
 /**
  * Get the view projection.
  * @return {ol.proj.Projection} The projection of the view.
diff --git a/test/spec/ol/view.test.js b/test/spec/ol/view.test.js
index 4196cac145..d12505d538 100644
--- a/test/spec/ol/view.test.js
+++ b/test/spec/ol/view.test.js
@@ -904,6 +904,38 @@ describe('ol.View', function() {
 
   });
 
+  describe('#getMaxZoom', function() {
+
+    it('returns the zoom level for the min resolution', function() {
+      var view = new ol.View();
+      expect(view.getMaxZoom()).to.be(view.getZoomForResolution(view.getMinResolution()));
+    });
+
+    it('works for a view configured with a maxZoom', function() {
+      var view = new ol.View({
+        maxZoom: 10
+      });
+      expect(view.getMaxZoom()).to.be(10);
+    });
+
+  });
+
+  describe('#getMinZoom', function() {
+
+    it('returns the zoom level for the max resolution', function() {
+      var view = new ol.View();
+      expect(view.getMinZoom()).to.be(view.getZoomForResolution(view.getMaxResolution()));
+    });
+
+    it('works for views configured with a minZoom', function() {
+      var view = new ol.View({
+        minZoom: 3
+      });
+      expect(view.getMinZoom()).to.be(3);
+    });
+
+  });
+
   describe('#calculateExtent', function() {
     it('returns the expected extent', function() {
       var view = new ol.View({