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MGLMapView.mm
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#import "MGLMapView_Private.h"
#include <mbgl/util/logging.hpp>
#import <GLKit/GLKit.h>
#import <OpenGLES/EAGL.h>
#include <mbgl/map/map.hpp>
#include <mbgl/map/view.hpp>
#include <mbgl/annotation/annotation.hpp>
#include <mbgl/map/camera.hpp>
#include <mbgl/map/mode.hpp>
#include <mbgl/util/platform.hpp>
#include <mbgl/storage/reachability.h>
#include <mbgl/util/default_thread_pool.hpp>
#include <mbgl/storage/default_file_source.hpp>
#include <mbgl/storage/network_status.hpp>
#include <mbgl/style/image.hpp>
#include <mbgl/style/transition_options.hpp>
#include <mbgl/style/layers/custom_layer.hpp>
#include <mbgl/map/backend.hpp>
#include <mbgl/map/backend_scope.hpp>
#include <mbgl/math/wrap.hpp>
#include <mbgl/util/exception.hpp>
#include <mbgl/util/geo.hpp>
#include <mbgl/util/constants.hpp>
#include <mbgl/util/image.hpp>
#include <mbgl/util/projection.hpp>
#include <mbgl/util/default_styles.hpp>
#include <mbgl/util/chrono.hpp>
#include <mbgl/util/run_loop.hpp>
#include <mbgl/util/shared_thread_pool.hpp>
#include <mbgl/util/string.hpp>
#include <mbgl/util/projection.hpp>
#import "Mapbox.h"
#import "MGLFeature_Private.h"
#import "MGLGeometry_Private.h"
#import "MGLMultiPoint_Private.h"
#import "MGLOfflineStorage_Private.h"
#import "MGLFoundation_Private.h"
#import "NSBundle+MGLAdditions.h"
#import "NSDate+MGLAdditions.h"
#import "NSException+MGLAdditions.h"
#import "NSPredicate+MGLAdditions.h"
#import "NSProcessInfo+MGLAdditions.h"
#import "NSString+MGLAdditions.h"
#import "NSURL+MGLAdditions.h"
#import "UIImage+MGLAdditions.h"
#import "UIViewController+MGLAdditions.h"
#import "MGLFaux3DUserLocationAnnotationView.h"
#import "MGLUserLocationAnnotationView.h"
#import "MGLUserLocationAnnotationView_Private.h"
#import "MGLUserLocation_Private.h"
#import "MGLAnnotationImage_Private.h"
#import "MGLAnnotationView_Private.h"
#import "MGLScaleBar.h"
#import "MGLStyle_Private.h"
#import "MGLStyleLayer_Private.h"
#import "MGLMapboxEvents.h"
#import "MGLSDKUpdateChecker.h"
#import "MGLCompactCalloutView.h"
#import "MGLAnnotationContainerView.h"
#import "MGLAnnotationContainerView_Private.h"
#import "MGLAttributionInfo_Private.h"
#include <algorithm>
#include <cstdlib>
#include <map>
#include <unordered_set>
class MBGLView;
class MGLAnnotationContext;
const CGFloat MGLMapViewDecelerationRateNormal = UIScrollViewDecelerationRateNormal;
const CGFloat MGLMapViewDecelerationRateFast = UIScrollViewDecelerationRateFast;
const CGFloat MGLMapViewDecelerationRateImmediate = 0.0;
/// Indicates the manner in which the map view is tracking the user location.
typedef NS_ENUM(NSUInteger, MGLUserTrackingState) {
/// The map view is not yet tracking the user location.
MGLUserTrackingStatePossible = 0,
/// The map view has begun to move to the first reported user location.
MGLUserTrackingStateBegan,
/// The map view begins a significant transition.
MGLUserTrackingStateBeginSignificantTransition,
/// The map view has finished moving to the first reported user location.
MGLUserTrackingStateChanged,
};
const NSTimeInterval MGLAnimationDuration = 0.3;
/// Duration of an animation due to a user location update, typically chosen to
/// match a typical interval between user location updates.
const NSTimeInterval MGLUserLocationAnimationDuration = 1.0;
/// Distance between the map view’s edge and that of the user location
/// annotation view.
const UIEdgeInsets MGLUserLocationAnnotationViewInset = UIEdgeInsetsMake(50, 0, 50, 0);
const CGSize MGLAnnotationUpdateViewportOutset = {150, 150};
const CGFloat MGLMinimumZoom = 3;
/// Minimum initial zoom level when entering user tracking mode.
const double MGLMinimumZoomLevelForUserTracking = 10.5;
/// Initial zoom level when entering user tracking mode from a low zoom level.
const double MGLDefaultZoomLevelForUserTracking = 14.0;
const NSUInteger MGLTargetFrameInterval = 1; // Target FPS will be 60 divided by this value
/// Tolerance for snapping to true north, measured in degrees in either direction.
const CLLocationDirection MGLToleranceForSnappingToNorth = 7;
/// Distance threshold to stop the camera while animating.
const CLLocationDistance MGLDistanceThresholdForCameraPause = 500;
/// Reuse identifier and file name of the default point annotation image.
static NSString * const MGLDefaultStyleMarkerSymbolName = @"default_marker";
/// Reuse identifier and file name of the invisible point annotation image used
/// by annotations that are visually backed by MGLAnnotationView objects
static NSString * const MGLInvisibleStyleMarkerSymbolName = @"invisible_marker";
/// Prefix that denotes a sprite installed by MGLMapView, to avoid collisions
/// with style-defined sprites.
NSString *const MGLAnnotationSpritePrefix = @"com.mapbox.sprites.";
/// Slop area around the hit testing point, allowing for imprecise annotation selection.
const CGFloat MGLAnnotationImagePaddingForHitTest = 5;
/// Distance from the callout’s anchor point to the annotation it points to.
const CGFloat MGLAnnotationImagePaddingForCallout = 1;
const CGSize MGLAnnotationAccessibilityElementMinimumSize = CGSizeMake(10, 10);
// Context for KVO observing UILayoutGuides.
static void * MGLLayoutGuidesUpdatedContext = &MGLLayoutGuidesUpdatedContext;
/// Unique identifier representing a single annotation in mbgl.
typedef uint32_t MGLAnnotationTag;
/// An indication that the requested annotation was not found or is nonexistent.
enum { MGLAnnotationTagNotFound = UINT32_MAX };
/// Mapping from an annotation tag to metadata about that annotation, including
/// the annotation itself.
typedef std::unordered_map<MGLAnnotationTag, MGLAnnotationContext> MGLAnnotationTagContextMap;
/// Mapping from an annotation object to an annotation tag.
typedef std::map<id<MGLAnnotation>, MGLAnnotationTag> MGLAnnotationObjectTagMap;
mbgl::util::UnitBezier MGLUnitBezierForMediaTimingFunction(CAMediaTimingFunction *function)
{
if ( ! function)
{
function = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionDefault];
}
float p1[2], p2[2];
[function getControlPointAtIndex:0 values:p1];
[function getControlPointAtIndex:1 values:p2];
return { p1[0], p1[1], p2[0], p2[1] };
}
@interface MGLAnnotationAccessibilityElement : UIAccessibilityElement
@property (nonatomic) MGLAnnotationTag tag;
- (instancetype)initWithAccessibilityContainer:(id)container tag:(MGLAnnotationTag)identifier NS_DESIGNATED_INITIALIZER;
@end
@implementation MGLAnnotationAccessibilityElement
- (instancetype)initWithAccessibilityContainer:(id)container tag:(MGLAnnotationTag)tag
{
if (self = [super initWithAccessibilityContainer:container])
{
_tag = tag;
self.accessibilityTraits = UIAccessibilityTraitButton | UIAccessibilityTraitAdjustable;
}
return self;
}
- (void)accessibilityIncrement
{
[self.accessibilityContainer accessibilityIncrement];
}
- (void)accessibilityDecrement
{
[self.accessibilityContainer accessibilityDecrement];
}
@end
/// Lightweight container for metadata about an annotation, including the annotation itself.
class MGLAnnotationContext {
public:
id <MGLAnnotation> annotation;
/// The annotation’s image’s reuse identifier.
NSString *imageReuseIdentifier;
MGLAnnotationAccessibilityElement *accessibilityElement;
MGLAnnotationView *annotationView;
NSString *viewReuseIdentifier;
};
/** An accessibility element representing the MGLMapView at large. */
@interface MGLMapViewProxyAccessibilityElement : UIAccessibilityElement
@end
@implementation MGLMapViewProxyAccessibilityElement
- (instancetype)initWithAccessibilityContainer:(id)container
{
if (self = [super initWithAccessibilityContainer:container])
{
self.accessibilityTraits = UIAccessibilityTraitButton;
self.accessibilityLabel = [self.accessibilityContainer accessibilityLabel];
self.accessibilityHint = NSLocalizedStringWithDefaultValue(@"CLOSE_CALLOUT_A11Y_HINT", nil, nil, @"Returns to the map", @"Accessibility hint for closing the selected annotation’s callout view and returning to the map");
}
return self;
}
@end
#pragma mark - Private -
@interface MGLMapView () <UIGestureRecognizerDelegate,
GLKViewDelegate,
CLLocationManagerDelegate,
SMCalloutViewDelegate,
MGLCalloutViewDelegate,
MGLMultiPointDelegate,
MGLAnnotationImageDelegate>
@property (nonatomic) EAGLContext *context;
@property (nonatomic) GLKView *glView;
@property (nonatomic) UIImageView *glSnapshotView;
@property (nonatomic, readwrite) MGLScaleBar *scaleBar;
@property (nonatomic, readwrite) UIImageView *compassView;
@property (nonatomic, readwrite) UIImageView *logoView;
@property (nonatomic, readwrite) UIButton *attributionButton;
@property (nonatomic, readwrite) MGLStyle *style;
@property (nonatomic) UITapGestureRecognizer *singleTapGestureRecognizer;
@property (nonatomic) UITapGestureRecognizer *doubleTap;
@property (nonatomic) UITapGestureRecognizer *twoFingerTap;
@property (nonatomic) UIPanGestureRecognizer *pan;
@property (nonatomic) UIPinchGestureRecognizer *pinch;
@property (nonatomic) UIRotationGestureRecognizer *rotate;
@property (nonatomic) UILongPressGestureRecognizer *quickZoom;
@property (nonatomic) UIPanGestureRecognizer *twoFingerDrag;
/// Mapping from reusable identifiers to annotation images.
@property (nonatomic) NS_MUTABLE_DICTIONARY_OF(NSString *, MGLAnnotationImage *) *annotationImagesByIdentifier;
/// Currently shown popover representing the selected annotation.
@property (nonatomic) UIView<MGLCalloutView> *calloutViewForSelectedAnnotation;
@property (nonatomic) MGLUserLocationAnnotationView *userLocationAnnotationView;
/// Indicates how thoroughly the map view is tracking the user location.
@property (nonatomic) MGLUserTrackingState userTrackingState;
@property (nonatomic) CLLocationManager *locationManager;
@property (nonatomic) CGFloat scale;
@property (nonatomic) CGFloat angle;
@property (nonatomic) CGFloat quickZoomStart;
@property (nonatomic, getter=isDormant) BOOL dormant;
@property (nonatomic, readonly, getter=isRotationAllowed) BOOL rotationAllowed;
@property (nonatomic) MGLMapViewProxyAccessibilityElement *mapViewProxyAccessibilityElement;
@property (nonatomic) MGLAnnotationContainerView *annotationContainerView;
@property (nonatomic) MGLUserLocation *userLocation;
@property (nonatomic) NS_MUTABLE_DICTIONARY_OF(NSString *, NS_MUTABLE_ARRAY_OF(MGLAnnotationView *) *) *annotationViewReuseQueueByIdentifier;
@end
@implementation MGLMapView
{
mbgl::Map *_mbglMap;
MBGLView *_mbglView;
std::shared_ptr<mbgl::ThreadPool> _mbglThreadPool;
BOOL _opaque;
NS_MUTABLE_ARRAY_OF(NSURL *) *_bundledStyleURLs;
MGLAnnotationTagContextMap _annotationContextsByAnnotationTag;
MGLAnnotationObjectTagMap _annotationTagsByAnnotation;
/// Tag of the selected annotation. If the user location annotation is selected, this ivar is set to `MGLAnnotationTagNotFound`.
MGLAnnotationTag _selectedAnnotationTag;
BOOL _userLocationAnnotationIsSelected;
/// Size of the rectangle formed by unioning the maximum slop area around every annotation image and annotation image view.
CGSize _unionedAnnotationRepresentationSize;
CGSize _largestAnnotationViewSize;
std::vector<MGLAnnotationTag> _annotationsNearbyLastTap;
CGPoint _initialImplicitCalloutViewOffset;
NSDate *_userLocationAnimationCompletionDate;
/// True if a willChange notification has been issued for shape annotation layers and a didChange notification is pending.
BOOL _isChangingAnnotationLayers;
BOOL _isObservingTopLayoutGuide;
BOOL _isObservingBottomLayoutGuide;
BOOL _isWaitingForRedundantReachableNotification;
BOOL _isTargetingInterfaceBuilder;
CLLocationDegrees _pendingLatitude;
CLLocationDegrees _pendingLongitude;
CADisplayLink *_displayLink;
BOOL _needsDisplayRefresh;
NSUInteger _changeDelimiterSuppressionDepth;
/// Center coordinate of the pinch gesture on the previous iteration of the gesture.
CLLocationCoordinate2D _previousPinchCenterCoordinate;
NSUInteger _previousPinchNumberOfTouches;
CLLocationDistance _distanceFromOldUserLocation;
BOOL _delegateHasAlphasForShapeAnnotations;
BOOL _delegateHasStrokeColorsForShapeAnnotations;
BOOL _delegateHasFillColorsForShapeAnnotations;
BOOL _delegateHasLineWidthsForShapeAnnotations;
MGLCompassDirectionFormatter *_accessibilityCompassFormatter;
MGLReachability *_reachability;
}
#pragma mark - Setup & Teardown -
- (instancetype)initWithFrame:(CGRect)frame
{
if (self = [super initWithFrame:frame])
{
[self commonInit];
self.styleURL = nil;
}
return self;
}
- (instancetype)initWithFrame:(CGRect)frame styleURL:(nullable NSURL *)styleURL
{
if (self = [super initWithFrame:frame])
{
[self commonInit];
self.styleURL = styleURL;
}
return self;
}
- (instancetype)initWithCoder:(nonnull NSCoder *)decoder
{
if (self = [super initWithCoder:decoder])
{
[self commonInit];
self.styleURL = nil;
}
return self;
}
+ (void)initialize
{
if (self == [MGLMapView self])
{
[MGLSDKUpdateChecker checkForUpdates];
}
}
+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingStyle
{
return [NSSet setWithObject:@"styleURL"];
}
+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingStyleURL
{
return [NSSet setWithObjects:@"styleURL__", nil];
}
- (nonnull NSURL *)styleURL
{
NSString *styleURLString = @(_mbglMap->getStyleURL().c_str()).mgl_stringOrNilIfEmpty;
NSAssert(styleURLString || _isTargetingInterfaceBuilder, @"Invalid style URL string %@", styleURLString);
return styleURLString ? [NSURL URLWithString:styleURLString] : nil;
}
- (void)setStyleURL:(nullable NSURL *)styleURL
{
if (_isTargetingInterfaceBuilder) return;
if ( ! styleURL)
{
styleURL = [MGLStyle streetsStyleURLWithVersion:MGLStyleDefaultVersion];
}
styleURL = styleURL.mgl_URLByStandardizingScheme;
self.style = nil;
_mbglMap->setStyleURL([[styleURL absoluteString] UTF8String]);
}
- (IBAction)reloadStyle:(__unused id)sender {
NSURL *styleURL = self.styleURL;
_mbglMap->setStyleURL("");
self.styleURL = styleURL;
}
- (mbgl::Map *)mbglMap
{
return _mbglMap;
}
- (void)commonInit
{
_isTargetingInterfaceBuilder = NSProcessInfo.processInfo.mgl_isInterfaceBuilderDesignablesAgent;
_opaque = NO;
BOOL background = [UIApplication sharedApplication].applicationState == UIApplicationStateBackground;
if (!background)
{
[self createGLView];
}
// setup accessibility
//
// self.isAccessibilityElement = YES;
self.accessibilityLabel = NSLocalizedStringWithDefaultValue(@"MAP_A11Y_LABEL", nil, nil, @"Map", @"Accessibility label");
self.accessibilityTraits = UIAccessibilityTraitAllowsDirectInteraction | UIAccessibilityTraitAdjustable;
_accessibilityCompassFormatter = [[MGLCompassDirectionFormatter alloc] init];
_accessibilityCompassFormatter.unitStyle = NSFormattingUnitStyleLong;
self.backgroundColor = [UIColor clearColor];
self.clipsToBounds = YES;
// setup mbgl view
_mbglView = new MBGLView(self);
// Delete the pre-offline ambient cache at ~/Library/Caches/cache.db.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *fileCachePath = [paths.firstObject stringByAppendingPathComponent:@"cache.db"];
[[NSFileManager defaultManager] removeItemAtPath:fileCachePath error:NULL];
// setup mbgl map
mbgl::DefaultFileSource *mbglFileSource = [MGLOfflineStorage sharedOfflineStorage].mbglFileSource;
const float scaleFactor = [UIScreen instancesRespondToSelector:@selector(nativeScale)] ? [[UIScreen mainScreen] nativeScale] : [[UIScreen mainScreen] scale];
_mbglThreadPool = mbgl::sharedThreadPool();
_mbglMap = new mbgl::Map(*_mbglView, self.size, scaleFactor, *mbglFileSource, *_mbglThreadPool, mbgl::MapMode::Continuous, mbgl::GLContextMode::Unique, mbgl::ConstrainMode::None, mbgl::ViewportMode::Default);
[self validateTileCacheSize];
// start paused if in IB
if (_isTargetingInterfaceBuilder || background) {
self.dormant = YES;
}
// Notify map object when network reachability status changes.
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(reachabilityChanged:)
name:kMGLReachabilityChangedNotification
object:nil];
_reachability = [MGLReachability reachabilityForInternetConnection];
if ([_reachability isReachable])
{
_isWaitingForRedundantReachableNotification = YES;
}
[_reachability startNotifier];
// Set up annotation management and selection state.
_annotationImagesByIdentifier = [NSMutableDictionary dictionary];
_annotationContextsByAnnotationTag = {};
_annotationTagsByAnnotation = {};
_annotationViewReuseQueueByIdentifier = [NSMutableDictionary dictionary];
_selectedAnnotationTag = MGLAnnotationTagNotFound;
_annotationsNearbyLastTap = {};
// setup logo bug
//
UIImage *logo = [MGLMapView resourceImageNamed:@"mapbox"];
_logoView = [[UIImageView alloc] initWithImage:logo];
_logoView.accessibilityTraits = UIAccessibilityTraitStaticText;
_logoView.accessibilityLabel = NSLocalizedStringWithDefaultValue(@"LOGO_A11Y_LABEL", nil, nil, @"Mapbox", @"Accessibility label");
[self addSubview:_logoView];
// setup attribution
//
_attributionButton = [UIButton buttonWithType:UIButtonTypeInfoLight];
_attributionButton.accessibilityLabel = NSLocalizedStringWithDefaultValue(@"INFO_A11Y_LABEL", nil, nil, @"About this map", @"Accessibility label");
_attributionButton.accessibilityHint = NSLocalizedStringWithDefaultValue(@"INFO_A11Y_HINT", nil, nil, @"Shows credits, a feedback form, and more", @"Accessibility hint");
[_attributionButton addTarget:self action:@selector(showAttribution) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:_attributionButton];
[_attributionButton addObserver:self forKeyPath:@"hidden" options:NSKeyValueObservingOptionNew context:NULL];
// setup compass
//
_compassView = [[UIImageView alloc] initWithImage:self.compassImage];
_compassView.alpha = 0;
_compassView.userInteractionEnabled = YES;
[_compassView addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleCompassTapGesture:)]];
_compassView.accessibilityTraits = UIAccessibilityTraitButton;
_compassView.accessibilityLabel = NSLocalizedStringWithDefaultValue(@"COMPASS_A11Y_LABEL", nil, nil, @"Compass", @"Accessibility label");
_compassView.accessibilityHint = NSLocalizedStringWithDefaultValue(@"COMPASS_A11Y_HINT", nil, nil, @"Rotates the map to face due north", @"Accessibility hint");
[self addSubview:_compassView];
// setup scale control
//
_scaleBar = [[MGLScaleBar alloc] init];
[self addSubview:_scaleBar];
// setup interaction
//
_pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePanGesture:)];
_pan.delegate = self;
_pan.maximumNumberOfTouches = 1;
[self addGestureRecognizer:_pan];
_scrollEnabled = YES;
_pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinchGesture:)];
_pinch.delegate = self;
[self addGestureRecognizer:_pinch];
_zoomEnabled = YES;
_rotate = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(handleRotateGesture:)];
_rotate.delegate = self;
[self addGestureRecognizer:_rotate];
_rotateEnabled = YES;
_doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTapGesture:)];
_doubleTap.numberOfTapsRequired = 2;
[self addGestureRecognizer:_doubleTap];
_singleTapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTapGesture:)];
[_singleTapGestureRecognizer requireGestureRecognizerToFail:_doubleTap];
_singleTapGestureRecognizer.delegate = self;
[self addGestureRecognizer:_singleTapGestureRecognizer];
_twoFingerDrag = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handleTwoFingerDragGesture:)];
_twoFingerDrag.minimumNumberOfTouches = 2;
_twoFingerDrag.maximumNumberOfTouches = 2;
_twoFingerDrag.delegate = self;
[_twoFingerDrag requireGestureRecognizerToFail:_pan];
[self addGestureRecognizer:_twoFingerDrag];
_pitchEnabled = YES;
_twoFingerTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTwoFingerTapGesture:)];
_twoFingerTap.numberOfTouchesRequired = 2;
[_twoFingerTap requireGestureRecognizerToFail:_pinch];
[_twoFingerTap requireGestureRecognizerToFail:_rotate];
[_twoFingerTap requireGestureRecognizerToFail:_twoFingerDrag];
[self addGestureRecognizer:_twoFingerTap];
_decelerationRate = MGLMapViewDecelerationRateNormal;
_quickZoom = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleQuickZoomGesture:)];
_quickZoom.numberOfTapsRequired = 1;
_quickZoom.minimumPressDuration = 0;
[_quickZoom requireGestureRecognizerToFail:_doubleTap];
[self addGestureRecognizer:_quickZoom];
// observe app activity
//
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(willTerminate) name:UIApplicationWillTerminateNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sleepGL:) name:UIApplicationDidEnterBackgroundNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(wakeGL:) name:UIApplicationWillEnterForegroundNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(wakeGL:) name:UIApplicationDidBecomeActiveNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didReceiveMemoryWarning) name:UIApplicationDidReceiveMemoryWarningNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(deviceOrientationDidChange:) name:UIDeviceOrientationDidChangeNotification object:nil];
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
// set initial position
//
mbgl::CameraOptions options;
options.center = mbgl::LatLng(0, 0);
mbgl::EdgeInsets padding = MGLEdgeInsetsFromNSEdgeInsets(self.contentInset);
options.padding = padding;
options.zoom = 0;
_mbglMap->jumpTo(options);
_pendingLatitude = NAN;
_pendingLongitude = NAN;
_targetCoordinate = kCLLocationCoordinate2DInvalid;
if ([UIApplication sharedApplication].applicationState != UIApplicationStateBackground) {
[MGLMapboxEvents pushEvent:MGLEventTypeMapLoad withAttributes:@{}];
}
}
- (mbgl::Size)size
{
// check for minimum texture size supported by OpenGL ES 2.0
//
CGSize size = CGSizeMake(MAX(self.bounds.size.width, 64), MAX(self.bounds.size.height, 64));
return { static_cast<uint32_t>(size.width),
static_cast<uint32_t>(size.height) };
}
- (mbgl::Size)framebufferSize
{
return { static_cast<uint32_t>(self.glView.drawableWidth),
static_cast<uint32_t>(self.glView.drawableHeight) };
}
- (void)createGLView
{
if (_context) return;
// create context
//
_context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
NSAssert(_context, @"Failed to create OpenGL ES context.");
// create GL view
//
_glView = [[GLKView alloc] initWithFrame:self.bounds context:_context];
_glView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
_glView.enableSetNeedsDisplay = NO;
_glView.drawableStencilFormat = GLKViewDrawableStencilFormat8;
_glView.drawableDepthFormat = GLKViewDrawableDepthFormat16;
_glView.contentScaleFactor = [UIScreen instancesRespondToSelector:@selector(nativeScale)] ? [[UIScreen mainScreen] nativeScale] : [[UIScreen mainScreen] scale];
_glView.layer.opaque = _opaque;
_glView.delegate = self;
[_glView bindDrawable];
[self insertSubview:_glView atIndex:0];
_glView.contentMode = UIViewContentModeCenter;
}
- (UIImage *)compassImage
{
UIImage *scaleImage = [MGLMapView resourceImageNamed:@"Compass"];
UIGraphicsBeginImageContextWithOptions(scaleImage.size, NO, [UIScreen mainScreen].scale);
[scaleImage drawInRect:{ CGPointZero, scaleImage.size }];
CGFloat northSize = 11;
UIFont *northFont;
if ([UIFont respondsToSelector:@selector(systemFontOfSize:weight:)])
{
northFont = [UIFont systemFontOfSize:northSize weight:UIFontWeightUltraLight];
}
else
{
northFont = [UIFont systemFontOfSize:northSize];
}
NSAttributedString *north = [[NSAttributedString alloc] initWithString:NSLocalizedStringWithDefaultValue(@"COMPASS_NORTH", nil, nil, @"N", @"Compass abbreviation for north") attributes:@{
NSFontAttributeName: northFont,
NSForegroundColorAttributeName: [UIColor whiteColor],
}];
CGRect stringRect = CGRectMake((scaleImage.size.width - north.size.width) / 2,
scaleImage.size.height * 0.435,
north.size.width, north.size.height);
[north drawInRect:stringRect];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
- (void)reachabilityChanged:(NSNotification *)notification
{
MGLAssertIsMainThread();
MGLReachability *reachability = [notification object];
if ( ! _isWaitingForRedundantReachableNotification && [reachability isReachable])
{
mbgl::NetworkStatus::Reachable();
}
_isWaitingForRedundantReachableNotification = NO;
}
- (void)willMoveToWindow:(UIWindow *)newWindow
{
[super willMoveToWindow:newWindow];
if (newWindow) {
[self addLayoutGuideObserversIfNeeded];
} else {
[self removeLayoutGuideObserversIfNeeded];
}
}
- (void)addLayoutGuideObserversIfNeeded
{
UIViewController *viewController = self.viewControllerForLayoutGuides;
BOOL useLayoutGuides = viewController.view && viewController.automaticallyAdjustsScrollViewInsets;
if (useLayoutGuides && viewController.topLayoutGuide && !_isObservingTopLayoutGuide) {
[(NSObject *)viewController.topLayoutGuide addObserver:self forKeyPath:@"bounds" options:0 context:(void *)&MGLLayoutGuidesUpdatedContext];
_isObservingTopLayoutGuide = YES;
}
if (useLayoutGuides && viewController.bottomLayoutGuide && !_isObservingBottomLayoutGuide) {
[(NSObject *)viewController.bottomLayoutGuide addObserver:self forKeyPath:@"bounds" options:0 context:(void *)&MGLLayoutGuidesUpdatedContext];
_isObservingBottomLayoutGuide = YES;
}
}
- (void)removeLayoutGuideObserversIfNeeded
{
UIViewController *viewController = self.viewControllerForLayoutGuides;
if (_isObservingTopLayoutGuide) {
[(NSObject *)viewController.topLayoutGuide removeObserver:self forKeyPath:@"bounds" context:(void *)&MGLLayoutGuidesUpdatedContext];
_isObservingTopLayoutGuide = NO;
}
if (_isObservingBottomLayoutGuide) {
[(NSObject *)viewController.bottomLayoutGuide removeObserver:self forKeyPath:@"bounds" context:(void *)&MGLLayoutGuidesUpdatedContext];
_isObservingBottomLayoutGuide = NO;
}
}
- (void)dealloc
{
[_reachability stopNotifier];
[[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] removeObserver:self];
[_attributionButton removeObserver:self forKeyPath:@"hidden"];
[self removeLayoutGuideObserversIfNeeded];
// Removing the annotations unregisters any outstanding KVO observers.
NSArray *annotations = self.annotations;
if (annotations)
{
[self removeAnnotations:annotations];
}
[self validateDisplayLink];
if (_mbglMap)
{
delete _mbglMap;
_mbglMap = nullptr;
}
if (_mbglView)
{
delete _mbglView;
_mbglView = nullptr;
}
if ([[EAGLContext currentContext] isEqual:_context])
{
[EAGLContext setCurrentContext:nil];
}
}
- (void)setDelegate:(nullable id<MGLMapViewDelegate>)delegate
{
if (_delegate == delegate) return;
_delegate = delegate;
_delegateHasAlphasForShapeAnnotations = [_delegate respondsToSelector:@selector(mapView:alphaForShapeAnnotation:)];
_delegateHasStrokeColorsForShapeAnnotations = [_delegate respondsToSelector:@selector(mapView:strokeColorForShapeAnnotation:)];
_delegateHasFillColorsForShapeAnnotations = [_delegate respondsToSelector:@selector(mapView:fillColorForPolygonAnnotation:)];
_delegateHasLineWidthsForShapeAnnotations = [_delegate respondsToSelector:@selector(mapView:lineWidthForPolylineAnnotation:)];
}
- (void)didReceiveMemoryWarning
{
MGLAssertIsMainThread();
_mbglMap->onLowMemory();
}
#pragma mark - Layout -
- (void)setFrame:(CGRect)frame
{
[super setFrame:frame];
if ( ! CGRectEqualToRect(frame, self.frame))
{
[self validateTileCacheSize];
}
}
- (void)setBounds:(CGRect)bounds
{
[super setBounds:bounds];
if ( ! CGRectEqualToRect(bounds, self.bounds))
{
[self validateTileCacheSize];
}
}
- (void)validateTileCacheSize
{
if ( ! _mbglMap)
{
return;
}
CGFloat zoomFactor = self.maximumZoomLevel - self.minimumZoomLevel + 1;
CGFloat cpuFactor = [NSProcessInfo processInfo].processorCount;
CGFloat memoryFactor = (CGFloat)[NSProcessInfo processInfo].physicalMemory / 1000 / 1000 / 1000;
CGFloat sizeFactor = (CGRectGetWidth(self.bounds) / mbgl::util::tileSize) *
(CGRectGetHeight(self.bounds) / mbgl::util::tileSize);
NSUInteger cacheSize = zoomFactor * cpuFactor * memoryFactor * sizeFactor * 0.5;
_mbglMap->setSourceTileCacheSize(cacheSize);
}
+ (BOOL)requiresConstraintBasedLayout
{
return YES;
}
- (UIViewController *)viewControllerForLayoutGuides
{
// Per -[UIResponder nextResponder] documentation, a UIView’s next responder
// is its managing UIViewController if applicable, or otherwise its
// superview. UIWindow’s next responder is UIApplication, which has no next
// responder.
UIResponder *laterResponder = self;
while ([laterResponder isKindOfClass:[UIView class]])
{
laterResponder = laterResponder.nextResponder;
}
if ([laterResponder isKindOfClass:[UIViewController class]])
{
return (UIViewController *)laterResponder;
}
return nil;
}
- (void)updateConstraints
{
[super updateConstraints];
// If we have a view controller reference and its automaticallyAdjustsScrollViewInsets
// is set to YES, -[MGLMapView adjustContentInset] takes top and bottom layout
// guides into account. To get notified about changes to the layout guides,
// we need to observe their bounds and re-layout accordingly.
[self addLayoutGuideObserversIfNeeded];
}
- (BOOL)isOpaque
{
return _opaque;
}
- (void)setOpaque:(BOOL)opaque
{
_glView.layer.opaque = _opaque = opaque;
}
// This is the delegate of the GLKView object's display call.
- (void)glkView:(__unused GLKView *)view drawInRect:(__unused CGRect)rect
{
if ( ! self.dormant)
{
// The OpenGL implementation automatically enables the OpenGL context for us.
mbgl::BackendScope scope { *_mbglView, mbgl::BackendScope::ScopeType::Implicit };
_mbglMap->render(*_mbglView);
[self updateUserLocationAnnotationView];
}
}
// This gets called when the view dimension changes, e.g. because the device is being rotated.
- (void)layoutSubviews
{
[super layoutSubviews];
[self adjustContentInset];
[self layoutOrnaments];
if (!_isTargetingInterfaceBuilder) {
_mbglMap->setSize([self size]);
}
if (self.compassView.alpha)
{
[self updateHeadingForDeviceOrientation];
[self updateCompass];
}
[self updateUserLocationAnnotationView];
}
- (void)layoutOrnaments
{
// scale bar
self.scaleBar.frame = {
self.contentInset.left+8,
self.contentInset.top+5,
CGRectGetWidth(self.scaleBar.frame),
CGRectGetHeight(self.scaleBar.frame)
};
// compass
self.compassView.center = {
.x = CGRectGetWidth(self.bounds)-CGRectGetMidX(self.compassView.bounds)-self.contentInset.right-5,
.y = CGRectGetMidY(self.compassView.bounds)+self.contentInset.top+5
};
// logo bug
self.logoView.frame = {
self.contentInset.left+8,
CGRectGetHeight(self.bounds)-8-self.contentInset.bottom-CGRectGetHeight(self.logoView.bounds),
CGRectGetWidth(self.logoView.bounds),
CGRectGetHeight(self.logoView.bounds)
};
// attribution
self.attributionButton.frame = {
CGRectGetWidth(self.bounds)-CGRectGetWidth(self.attributionButton.bounds)-self.contentInset.right-8,
CGRectGetHeight(self.bounds)-CGRectGetHeight(self.attributionButton.bounds)-self.contentInset.bottom-8,
CGRectGetWidth(self.attributionButton.bounds),
CGRectGetHeight(self.attributionButton.bounds)
};
}
/// Updates `contentInset` to reflect the current window geometry.
- (void)adjustContentInset
{
// We could crawl all the way up the responder chain using
// -viewControllerForLayoutGuides, but an intervening view means that any
// manual contentInset should not be overridden; something other than the
// top and bottom bars may be influencing the manual inset.
UIViewController *viewController;
if ([self.nextResponder isKindOfClass:[UIViewController class]])
{
// This map view is the content view of a view controller.
viewController = (UIViewController *)self.nextResponder;
}
else if ([self.superview.nextResponder isKindOfClass:[UIViewController class]])
{
// This map view is an immediate child of a view controller’s content view.
viewController = (UIViewController *)self.superview.nextResponder;
}
if ( ! viewController.automaticallyAdjustsScrollViewInsets)
{
return;
}
UIEdgeInsets contentInset = UIEdgeInsetsZero;
CGPoint topPoint = CGPointMake(0, viewController.topLayoutGuide.length);
contentInset.top = [self convertPoint:topPoint fromView:viewController.view].y;
CGPoint bottomPoint = CGPointMake(0, CGRectGetMaxY(viewController.view.bounds)
- viewController.bottomLayoutGuide.length);
contentInset.bottom = (CGRectGetMaxY(self.bounds)
- [self convertPoint:bottomPoint fromView:viewController.view].y);
// Negative insets are invalid, replace with 0.
contentInset.top = fmaxf(contentInset.top, 0);
contentInset.bottom = fmaxf(contentInset.bottom, 0);
self.contentInset = contentInset;
}
- (void)setContentInset:(UIEdgeInsets)contentInset
{
[self setContentInset:contentInset animated:NO];
}
- (void)setContentInset:(UIEdgeInsets)contentInset animated:(BOOL)animated
{
if (UIEdgeInsetsEqualToEdgeInsets(contentInset, self.contentInset))
{
return;
}
// After adjusting the content inset, move the center coordinate from the
// old frame of reference to the new one represented by the newly set
// content inset.
CLLocationCoordinate2D oldCenter = self.centerCoordinate;
_contentInset = contentInset;
if (self.userTrackingMode == MGLUserTrackingModeNone)
{
// Don’t call -setCenterCoordinate:, which resets the user tracking mode.
[self _setCenterCoordinate:oldCenter animated:animated];
}
else
{
[self didUpdateLocationWithUserTrackingAnimated:animated];
}
// Compass, logo and attribution button constraints needs to be updated.
[self setNeedsLayout];
}
/// Returns the frame of inset content within the map view.
- (CGRect)contentFrame
{
return UIEdgeInsetsInsetRect(self.bounds, self.contentInset);
}
/// Returns the center point of the inset content within the map view.
- (CGPoint)contentCenter
{
CGRect contentFrame = self.contentFrame;
return CGPointMake(CGRectGetMidX(contentFrame), CGRectGetMidY(contentFrame));
}
#pragma mark - Life Cycle -