From d37edadacbe20cd9fa71100d53098291ee7ea619 Mon Sep 17 00:00:00 2001
From: Jason Wray <jason@mapbox.com>
Date: Thu, 8 Mar 2018 14:31:58 -0500
Subject: [PATCH] [ios] Fix pinch drift ignoring delegate camera change
 response

---
 platform/ios/CHANGELOG.md      |  1 +
 platform/ios/src/MGLMapView.mm | 10 +++++++---
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/platform/ios/CHANGELOG.md b/platform/ios/CHANGELOG.md
index c50aac7b2..893fd0e5e 100644
--- a/platform/ios/CHANGELOG.md
+++ b/platform/ios/CHANGELOG.md
@@ -55,6 +55,7 @@ Mapbox welcomes participation and contributions from everyone. Please read [CONT
 
 ## 3.7.6
 
+* Fixed an issue where the pinch gesture could drift beyond bounds imposed by `-[MGLMapViewDelegate mapView:shouldChangeFromCamera:toCamera:]`. ([#11423](https://github.com/mapbox/mapbox-gl-native/pull/11423))
 * Improved the visibility of the heading indicator arrow. ([#11337](https://github.com/mapbox/mapbox-gl-native/pull/11337))
 
 ## 3.7.5 - February 16, 2018
diff --git a/platform/ios/src/MGLMapView.mm b/platform/ios/src/MGLMapView.mm
index 18a69a34c..6b47dc05f 100644
--- a/platform/ios/src/MGLMapView.mm
+++ b/platform/ios/src/MGLMapView.mm
@@ -1476,10 +1476,12 @@ public:
         double zoom = log2(newScale);
         MGLMapCamera *toCamera = [self cameraByZoomingToZoomLevel:zoom aroundAnchorPoint:centerPoint];
 
-        if ([self _shouldChangeFromCamera:oldCamera toCamera:toCamera])
+        if ( ! [self _shouldChangeFromCamera:oldCamera toCamera:toCamera])
         {
             drift = NO;
-        } else {
+        }
+        else
+        {
             if (drift)
             {
                 _mbglMap->setZoom(zoom, mbgl::ScreenCoordinate { centerPoint.x, centerPoint.y }, MGLDurationFromTimeInterval(duration));
@@ -1730,7 +1732,9 @@ public:
              {
                  [weakSelf unrotateIfNeededForGesture];
              }];
-        } else {
+        }
+        else
+        {
             [self unrotateIfNeededForGesture];
         }
     }