From 35768f8b482c08a03e61ef13a565fd716049657d Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Fri, 13 Dec 2013 16:05:08 +0100
Subject: [PATCH] Improve type checking in ol.interaction.Interaction

---
 src/ol/interaction/interaction.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/ol/interaction/interaction.js b/src/ol/interaction/interaction.js
index f70bffabd2..2fdbf57cdf 100644
--- a/src/ol/interaction/interaction.js
+++ b/src/ol/interaction/interaction.js
@@ -2,8 +2,10 @@
 
 goog.provide('ol.interaction.Interaction');
 
+goog.require('goog.asserts');
 goog.require('goog.events.EventTarget');
 goog.require('ol.MapBrowserEvent');
+goog.require('ol.View2D');
 goog.require('ol.animation');
 goog.require('ol.easing');
 
@@ -64,6 +66,7 @@ ol.interaction.Interaction.prototype.setMap = function(map) {
  */
 ol.interaction.Interaction.pan = function(
     map, view, delta, opt_duration) {
+  goog.asserts.assertInstanceof(view, ol.View2D);
   var currentCenter = view.getCenter();
   if (goog.isDef(currentCenter)) {
     if (goog.isDef(opt_duration) && opt_duration > 0) {
@@ -89,6 +92,7 @@ ol.interaction.Interaction.pan = function(
  */
 ol.interaction.Interaction.rotate =
     function(map, view, rotation, opt_anchor, opt_duration) {
+  goog.asserts.assertInstanceof(view, ol.View2D);
   rotation = view.constrainRotation(rotation, 0);
   ol.interaction.Interaction.rotateWithoutConstraints(
       map, view, rotation, opt_anchor, opt_duration);
@@ -104,6 +108,7 @@ ol.interaction.Interaction.rotate =
  */
 ol.interaction.Interaction.rotateWithoutConstraints =
     function(map, view, rotation, opt_anchor, opt_duration) {
+  goog.asserts.assertInstanceof(view, ol.View2D);
   if (goog.isDefAndNotNull(rotation)) {
     var currentRotation = view.getRotation();
     var currentCenter = view.getCenter();
@@ -125,6 +130,7 @@ ol.interaction.Interaction.rotateWithoutConstraints =
     if (goog.isDefAndNotNull(opt_anchor)) {
       var center = view.calculateCenterRotate(rotation, opt_anchor);
       map.withFrozenRendering(function() {
+        goog.asserts.assertInstanceof(view, ol.View2D);
         view.setCenter(center);
         view.setRotation(rotation);
       });
@@ -152,6 +158,7 @@ ol.interaction.Interaction.rotateWithoutConstraints =
  */
 ol.interaction.Interaction.zoom =
     function(map, view, resolution, opt_anchor, opt_duration, opt_direction) {
+  goog.asserts.assertInstanceof(view, ol.View2D);
   resolution = view.constrainResolution(resolution, 0, opt_direction);
   ol.interaction.Interaction.zoomWithoutConstraints(
       map, view, resolution, opt_anchor, opt_duration);
@@ -167,6 +174,7 @@ ol.interaction.Interaction.zoom =
  */
 ol.interaction.Interaction.zoomByDelta =
     function(map, view, delta, opt_anchor, opt_duration) {
+  goog.asserts.assertInstanceof(view, ol.View2D);
   var currentResolution = view.getResolution();
   var resolution = view.constrainResolution(currentResolution, delta, 0);
   ol.interaction.Interaction.zoomWithoutConstraints(
@@ -183,6 +191,7 @@ ol.interaction.Interaction.zoomByDelta =
  */
 ol.interaction.Interaction.zoomWithoutConstraints =
     function(map, view, resolution, opt_anchor, opt_duration) {
+  goog.asserts.assertInstanceof(view, ol.View2D);
   if (goog.isDefAndNotNull(resolution)) {
     var currentResolution = view.getResolution();
     var currentCenter = view.getCenter();
@@ -204,6 +213,7 @@ ol.interaction.Interaction.zoomWithoutConstraints =
     if (goog.isDefAndNotNull(opt_anchor)) {
       var center = view.calculateCenterZoom(resolution, opt_anchor);
       map.withFrozenRendering(function() {
+        goog.asserts.assertInstanceof(view, ol.View2D);
         view.setCenter(center);
         view.setResolution(resolution);
       });