From 0a736c3a76e3594c12868ed9dd5f1d8da3ca8050 Mon Sep 17 00:00:00 2001
From: "Justin R. Miller" <incanus@codesorcery.net>
Date: Thu, 2 Apr 2015 19:56:47 -0700
Subject: [PATCH 1/2] fixes #1181: fix lat/lng & zoom ordering problems

---
 platform/ios/MGLMapView.mm | 15 ++++++++++-----
 src/mbgl/map/map.cpp       |  2 +-
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/platform/ios/MGLMapView.mm b/platform/ios/MGLMapView.mm
index 962e3a112..a3c25f267 100644
--- a/platform/ios/MGLMapView.mm
+++ b/platform/ios/MGLMapView.mm
@@ -46,8 +46,9 @@ NSString *const MGLDefaultStyleName = @"Emerald";
 NSString *const MGLStyleVersion = @"v7";
 NSString *const MGLDefaultStyleMarkerSymbolName = @"default_marker";
 
-NSTimeInterval const MGLAnimationDuration = 0.3;
+const NSTimeInterval MGLAnimationDuration = 0.3;
 const CGSize MGLAnnotationUpdateViewportOutset = {150, 150};
+const CGFloat MGLMinZoom = 3;
 
 NSString *const MGLAnnotationIDKey = @"MGLAnnotationIDKey";
 
@@ -1129,7 +1130,9 @@ mbgl::DefaultFileSource *mbglFileSource = nullptr;
 {
     CGFloat duration = (animated ? MGLAnimationDuration : 0);
 
-    mbglMap->setLatLng(coordinateToLatLng(coordinate), secondsAsDuration(duration));
+    mbglMap->setLatLngZoom(coordinateToLatLng(coordinate),
+                           fmaxf(mbglMap->getZoom(), MGLMinZoom),
+                           secondsAsDuration(duration));
 
     [self notifyMapChange:@(animated ? mbgl::MapChangeRegionDidChangeAnimated : mbgl::MapChangeRegionDidChange)];
 }
@@ -1168,7 +1171,9 @@ mbgl::DefaultFileSource *mbglFileSource = nullptr;
 
     CGFloat duration = (animated ? MGLAnimationDuration : 0);
 
-    mbglMap->setZoom(zoomLevel, secondsAsDuration(duration));
+    mbglMap->setLatLngZoom(mbglMap->getLatLng(),
+                           fmaxf(zoomLevel, MGLMinZoom),
+                           secondsAsDuration(duration));
 
     [self unrotateIfNeededAnimated:animated];
 
@@ -1738,7 +1743,7 @@ CLLocationCoordinate2D latLngToCoordinate(mbgl::LatLng latLng)
         {
             self.showsUserLocation = YES;
 
-            if (self.zoomLevel < 3) [self setZoomLevel:3 animated:YES];
+            if (self.zoomLevel < MGLMinZoom) [self setZoomLevel:MGLMinZoom animated:YES];
 
             if (self.userLocationAnnotationView)
             {
@@ -1949,7 +1954,7 @@ CLLocationCoordinate2D latLngToCoordinate(mbgl::LatLng latLng)
 
 - (BOOL)isRotationAllowed
 {
-    return (self.zoomLevel > 3);
+    return (self.zoomLevel > MGLMinZoom);
 }
 
 // correct rotations to north as needed
diff --git a/src/mbgl/map/map.cpp b/src/mbgl/map/map.cpp
index 509986a6d..09e6b08a1 100644
--- a/src/mbgl/map/map.cpp
+++ b/src/mbgl/map/map.cpp
@@ -470,7 +470,7 @@ void Map::setLatLng(LatLng latLng, Duration duration) {
 }
 
 LatLng Map::getLatLng() const {
-    return state.getLatLng();
+    return transform.getLatLng();
 }
 
 void Map::resetPosition() {

From c253232473b82c5e3ae2fcb937301581c89bab50 Mon Sep 17 00:00:00 2001
From: "Justin R. Miller" <incanus@codesorcery.net>
Date: Fri, 3 Apr 2015 09:06:20 -0700
Subject: [PATCH 2/2] account for GL-level min zoom

---
 platform/ios/MGLMapView.mm | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/platform/ios/MGLMapView.mm b/platform/ios/MGLMapView.mm
index a3c25f267..d48694917 100644
--- a/platform/ios/MGLMapView.mm
+++ b/platform/ios/MGLMapView.mm
@@ -48,7 +48,7 @@ NSString *const MGLDefaultStyleMarkerSymbolName = @"default_marker";
 
 const NSTimeInterval MGLAnimationDuration = 0.3;
 const CGSize MGLAnnotationUpdateViewportOutset = {150, 150};
-const CGFloat MGLMinZoom = 3;
+const CGFloat MGLMinimumZoom = 3;
 
 NSString *const MGLAnnotationIDKey = @"MGLAnnotationIDKey";
 
@@ -1131,7 +1131,7 @@ mbgl::DefaultFileSource *mbglFileSource = nullptr;
     CGFloat duration = (animated ? MGLAnimationDuration : 0);
 
     mbglMap->setLatLngZoom(coordinateToLatLng(coordinate),
-                           fmaxf(mbglMap->getZoom(), MGLMinZoom),
+                           fmaxf(mbglMap->getZoom(), self.currentMinimumZoom),
                            secondsAsDuration(duration));
 
     [self notifyMapChange:@(animated ? mbgl::MapChangeRegionDidChangeAnimated : mbgl::MapChangeRegionDidChange)];
@@ -1172,7 +1172,7 @@ mbgl::DefaultFileSource *mbglFileSource = nullptr;
     CGFloat duration = (animated ? MGLAnimationDuration : 0);
 
     mbglMap->setLatLngZoom(mbglMap->getLatLng(),
-                           fmaxf(zoomLevel, MGLMinZoom),
+                           fmaxf(zoomLevel, self.currentMinimumZoom),
                            secondsAsDuration(duration));
 
     [self unrotateIfNeededAnimated:animated];
@@ -1743,7 +1743,7 @@ CLLocationCoordinate2D latLngToCoordinate(mbgl::LatLng latLng)
         {
             self.showsUserLocation = YES;
 
-            if (self.zoomLevel < MGLMinZoom) [self setZoomLevel:MGLMinZoom animated:YES];
+            if (self.zoomLevel < self.currentMinimumZoom) [self setZoomLevel:self.currentMinimumZoom animated:YES];
 
             if (self.userLocationAnnotationView)
             {
@@ -1952,9 +1952,14 @@ CLLocationCoordinate2D latLngToCoordinate(mbgl::LatLng latLng)
     dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delay * NSEC_PER_SEC)), dispatch_get_main_queue(), animations);
 }
 
+- (CGFloat)currentMinimumZoom
+{
+    return fmaxf(mbglMap->getMinZoom(), MGLMinimumZoom);
+}
+
 - (BOOL)isRotationAllowed
 {
-    return (self.zoomLevel > MGLMinZoom);
+    return (self.zoomLevel >= self.currentMinimumZoom);
 }
 
 // correct rotations to north as needed