From 9a13a2137aeeaf38fbf2e3f9f5618c99632fa229 Mon Sep 17 00:00:00 2001
From: Stepan Kuzmin <to.stepan.kuzmin@gmail.com>
Date: Tue, 10 Jan 2017 22:47:27 +0300
Subject: [PATCH] add "Map#isMoving" method #2792

---
 js/ui/map.js           | 14 ++++++++++++++
 test/js/ui/map.test.js | 17 +++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/js/ui/map.js b/js/ui/map.js
index 12837508269..19934d2b4af 100755
--- a/js/ui/map.js
+++ b/js/ui/map.js
@@ -134,6 +134,7 @@ class Map extends Camera {
         const transform = new Transform(options.minZoom, options.maxZoom, options.renderWorldCopies);
         super(transform, options);
 
+        this._isMoving = false;
         this._interactive = options.interactive;
         this._failIfMajorPerformanceCaveat = options.failIfMajorPerformanceCaveat;
         this._preserveDrawingBuffer = options.preserveDrawingBuffer;
@@ -169,9 +170,13 @@ class Map extends Camera {
 
         this.on('move', this._update.bind(this, false));
         this.on('zoom', this._update.bind(this, true));
+        this.on('movestart', () => {
+            this._isMoving = true;
+        });
         this.on('moveend', () => {
             this.animationLoop.set(300); // text fading
             this._rerender();
+            this._isMoving = false;
         });
 
         if (typeof window !== 'undefined') {
@@ -1215,6 +1220,15 @@ class Map extends Camera {
         }
     }
 
+    /**
+     * Returns a Boolean indicating whether the map is moving.
+     *
+     * @returns {boolean} A Boolean indicating whether the map is moving.
+     */
+    isMoving() {
+        return this._isMoving;
+    }
+
     /**
      * Gets and sets a Boolean indicating whether the map will render an outline
      * around each tile. These tile boundaries are useful for debugging.
diff --git a/test/js/ui/map.test.js b/test/js/ui/map.test.js
index 49bb25e6381..a99e71b5371 100755
--- a/test/js/ui/map.test.js
+++ b/test/js/ui/map.test.js
@@ -1155,6 +1155,23 @@ test('Map', (t) => {
         });
     });
 
+    t.test('Map#isMoving', (t) => {
+        t.plan(3);
+        const map = createMap();
+
+        t.equal(map.isMoving(), false);
+
+        map.on('movestart', () => {
+            t.equal(map.isMoving(), true);
+        });
+
+        map.on('moveend', () => {
+            t.equal(map.isMoving(), false);
+        });
+
+        map.zoomTo(5, { duration: 0 });
+    });
+
     t.end();
 });