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MGLMapView.mm
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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/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/style.hpp>
#include <mbgl/style/image.hpp>
#include <mbgl/style/transition_options.hpp>
#include <mbgl/style/layers/custom_layer.hpp>
#include <mbgl/renderer/mode.hpp>
#include <mbgl/renderer/renderer.hpp>
#include <mbgl/renderer/renderer_backend.hpp>
#include <mbgl/renderer/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 "MGLShape_Private.h"
#import "MGLFeature_Private.h"
#import "MGLGeometry_Private.h"
#import "MGLMultiPoint_Private.h"
#import "MGLOfflineStorage_Private.h"
#import "MGLVectorSource_Private.h"
#import "MGLFoundation_Private.h"
#import "MGLRendererFrontend.h"
#import "MGLRendererConfiguration.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"
#import "MGLMapAccessibilityElement.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);
/// 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] };
}
/// 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;
};
#pragma mark - Private -
@interface MGLMapView () <UIGestureRecognizerDelegate,
GLKViewDelegate,
CLLocationManagerDelegate,
MGLSMCalloutViewDelegate,
MGLCalloutViewDelegate,
MGLMultiPointDelegate,
MGLAnnotationImageDelegate>
@property (nonatomic) EAGLContext *context;
@property (nonatomic) GLKView *glView;
@property (nonatomic) UIImageView *glSnapshotView;
@property (nonatomic) NS_MUTABLE_ARRAY_OF(NSLayoutConstraint *) *scaleBarConstraints;
@property (nonatomic, readwrite) MGLScaleBar *scaleBar;
@property (nonatomic, readwrite) UIImageView *compassView;
@property (nonatomic) NS_MUTABLE_ARRAY_OF(NSLayoutConstraint *) *compassViewConstraints;
@property (nonatomic, readwrite) UIImageView *logoView;
@property (nonatomic) NS_MUTABLE_ARRAY_OF(NSLayoutConstraint *) *logoViewConstraints;
@property (nonatomic, readwrite) UIButton *attributionButton;
@property (nonatomic) NS_MUTABLE_ARRAY_OF(NSLayoutConstraint *) *attributionButtonConstraints;
@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::unique_ptr<MGLRenderFrontend> _rendererFrontend;
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 _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;
NS_ARRAY_OF(id <MGLFeature>) *_visiblePlaceFeatures;
NS_ARRAY_OF(id <MGLFeature>) *_visibleRoadFeatures;
NS_MUTABLE_SET_OF(MGLFeatureAccessibilityElement *) *_featureAccessibilityElements;
BOOL _accessibilityValueAnnouncementIsPending;
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 class])
{
[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->getStyle().getURL().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->getStyle().loadURL([[styleURL absoluteString] UTF8String]);
}
- (IBAction)reloadStyle:(__unused id)sender {
NSURL *styleURL = self.styleURL;
_mbglMap->getStyle().loadURL("");
self.styleURL = styleURL;
}
- (mbgl::Map *)mbglMap
{
return _mbglMap;
}
- (mbgl::Renderer *)renderer
{
return _rendererFrontend->getRenderer();
}
- (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;
if (@available(iOS 11.0, *)) { self.accessibilityIgnoresInvertColors = 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
MGLRendererConfiguration *config = [MGLRendererConfiguration currentConfiguration];
_mbglThreadPool = mbgl::sharedThreadPool();
auto renderer = std::make_unique<mbgl::Renderer>(*_mbglView, config.scaleFactor, *config.fileSource, *_mbglThreadPool, config.contextMode, config.cacheDir, config.localFontFamilyName);
_rendererFrontend = std::make_unique<MGLRenderFrontend>(std::move(renderer), self, *_mbglView);
_mbglMap = new mbgl::Map(*_rendererFrontend, *_mbglView, self.size, config.scaleFactor, *[config fileSource], *_mbglThreadPool, mbgl::MapMode::Continuous, mbgl::ConstrainMode::None, mbgl::ViewportMode::Default);
// 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
//
UIImage *logo = [MGLMapView resourceImageNamed:@"mapbox"];
_logoView = [[UIImageView alloc] initWithImage:logo];
_logoView.accessibilityTraits = UIAccessibilityTraitStaticText;
_logoView.accessibilityLabel = NSLocalizedStringWithDefaultValue(@"LOGO_A11Y_LABEL", nil, nil, @"Mapbox", @"Accessibility label");
_logoView.translatesAutoresizingMaskIntoConstraints = NO;
[self addSubview:_logoView];
_logoViewConstraints = [NSMutableArray array];
// 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];
_attributionButton.translatesAutoresizingMaskIntoConstraints = NO;
[self addSubview:_attributionButton];
_attributionButtonConstraints = [NSMutableArray array];
[_attributionButton addObserver:self forKeyPath:@"hidden" options:NSKeyValueObservingOptionNew context:NULL];
UILongPressGestureRecognizer *attributionLongPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(showAttribution:)];
[_attributionButton addGestureRecognizer:attributionLongPress];
// 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");
_compassView.translatesAutoresizingMaskIntoConstraints = NO;
[self addSubview:_compassView];
_compassViewConstraints = [NSMutableArray array];
// setup scale control
//
_scaleBar = [[MGLScaleBar alloc] init];
_scaleBar.translatesAutoresizingMaskIntoConstraints = NO;
[self addSubview:_scaleBar];
_scaleBarConstraints = [NSMutableArray array];
// 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)dealloc
{
[_reachability stopNotifier];
[[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] removeObserver:self];
[_attributionButton removeObserver:self forKeyPath:@"hidden"];
// 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];
}
[self.compassViewConstraints removeAllObjects];
self.compassViewConstraints = nil;
[self.scaleBarConstraints removeAllObjects];
self.scaleBarConstraints = nil;
[self.logoViewConstraints removeAllObjects];
self.logoViewConstraints = nil;
[self.attributionButtonConstraints removeAllObjects];
self.attributionButtonConstraints = 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();
_rendererFrontend->onLowMemory();
}
#pragma mark - Layout -
+ (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)updateConstraintsPreiOS11 {
// If we have a view controller reference and its automaticallyAdjustsScrollViewInsets
// is set to YES, use its view as the parent for constraints. -[MGLMapView adjustContentInset]
// already take top and bottom layout guides into account. If we don't have a reference, apply
// constraints against ourself to maintain placement of the subviews.
//
UIViewController *viewController = self.viewControllerForLayoutGuides;
BOOL useLayoutGuides = viewController.view && viewController.automaticallyAdjustsScrollViewInsets;
UIView *containerView = useLayoutGuides ? viewController.view : self;
// compass view
//
[containerView removeConstraints:self.compassViewConstraints];
[self.compassViewConstraints removeAllObjects];
if (useLayoutGuides) {
[self.compassViewConstraints addObject:
[NSLayoutConstraint constraintWithItem:self.compassView
attribute:NSLayoutAttributeTop
relatedBy:NSLayoutRelationGreaterThanOrEqual
toItem:viewController.topLayoutGuide
attribute:NSLayoutAttributeBottom
multiplier:1.0
constant:8.0]];
}
[self.compassViewConstraints addObject:
[NSLayoutConstraint constraintWithItem:self.compassView
attribute:NSLayoutAttributeTop
relatedBy:NSLayoutRelationGreaterThanOrEqual
toItem:self
attribute:NSLayoutAttributeTop
multiplier:1.0
constant:8.0 + self.contentInset.top]];
[self.compassViewConstraints addObject:
[NSLayoutConstraint constraintWithItem:self
attribute:NSLayoutAttributeTrailing
relatedBy:NSLayoutRelationEqual
toItem:self.compassView
attribute:NSLayoutAttributeTrailing
multiplier:1.0
constant:8.0 + self.contentInset.right]];
[containerView addConstraints:self.compassViewConstraints];
// scale bar view
//
[containerView removeConstraints:self.scaleBarConstraints];
[self.scaleBarConstraints removeAllObjects];
if (useLayoutGuides) {
[self.scaleBarConstraints addObject:
[NSLayoutConstraint constraintWithItem:self.scaleBar
attribute:NSLayoutAttributeTop
relatedBy:NSLayoutRelationGreaterThanOrEqual
toItem:viewController.topLayoutGuide
attribute:NSLayoutAttributeBottom
multiplier:1.0
constant:8.0]];
}
[self.scaleBarConstraints addObject:
[NSLayoutConstraint constraintWithItem:self.scaleBar
attribute:NSLayoutAttributeTop
relatedBy:NSLayoutRelationGreaterThanOrEqual
toItem:self
attribute:NSLayoutAttributeTop
multiplier:1.0
constant:8.0 + self.contentInset.top]];
[self.scaleBarConstraints addObject:
[NSLayoutConstraint constraintWithItem:self.scaleBar
attribute:NSLayoutAttributeLeft
relatedBy:NSLayoutRelationEqual
toItem:self
attribute:NSLayoutAttributeLeft
multiplier:1.0
constant:8.0 + self.contentInset.left]];
[containerView addConstraints:self.scaleBarConstraints];
// logo view
//
[containerView removeConstraints:self.logoViewConstraints];
[self.logoViewConstraints removeAllObjects];
if (useLayoutGuides) {
[self.logoViewConstraints addObject:
[NSLayoutConstraint constraintWithItem:viewController.bottomLayoutGuide
attribute:NSLayoutAttributeTop
relatedBy:NSLayoutRelationGreaterThanOrEqual
toItem:self.logoView
attribute:NSLayoutAttributeBaseline
multiplier:1.0
constant:8.0 + self.contentInset.bottom]];
}
[self.logoViewConstraints addObject:
[NSLayoutConstraint constraintWithItem:self
attribute:NSLayoutAttributeBottom
relatedBy:NSLayoutRelationGreaterThanOrEqual
toItem:self.logoView
attribute:NSLayoutAttributeBaseline
multiplier:1
constant:8.0 + self.contentInset.bottom]];
[self.logoViewConstraints addObject:
[NSLayoutConstraint constraintWithItem:self.logoView
attribute:NSLayoutAttributeLeading
relatedBy:NSLayoutRelationEqual
toItem:self
attribute:NSLayoutAttributeLeading
multiplier:1.0
constant:8.0 + self.contentInset.left]];
[containerView addConstraints:self.logoViewConstraints];
// attribution button
//
[containerView removeConstraints:self.attributionButtonConstraints];
[self.attributionButtonConstraints removeAllObjects];
if (useLayoutGuides) {
[self.attributionButtonConstraints addObject:
[NSLayoutConstraint constraintWithItem:viewController.bottomLayoutGuide
attribute:NSLayoutAttributeTop
relatedBy:NSLayoutRelationGreaterThanOrEqual
toItem:self.attributionButton
attribute:NSLayoutAttributeBaseline
multiplier:1
constant:8.0 + self.contentInset.bottom]];
}
[self.attributionButtonConstraints addObject:
[NSLayoutConstraint constraintWithItem:self
attribute:NSLayoutAttributeBottom
relatedBy:NSLayoutRelationGreaterThanOrEqual
toItem:self.attributionButton
attribute:NSLayoutAttributeBaseline
multiplier:1
constant:8.0 + self.contentInset.bottom]];
[self.attributionButtonConstraints addObject:
[NSLayoutConstraint constraintWithItem:self
attribute:NSLayoutAttributeTrailing
relatedBy:NSLayoutRelationEqual
toItem:self.attributionButton
attribute:NSLayoutAttributeTrailing
multiplier:1
constant:8.0 + self.contentInset.right]];
[containerView addConstraints:self.attributionButtonConstraints];
}
- (void)updateConstraints
{
// If safeAreaLayoutGuide API exists
if (@available(iOS 11.0, *)) {
UILayoutGuide *safeAreaLayoutGuide = self.safeAreaLayoutGuide;
// compass view
[self removeConstraints:self.compassViewConstraints];
[self.compassViewConstraints removeAllObjects];
[self.compassViewConstraints addObject:[self constraintForYAxisAnchor:self.compassView.topAnchor belowAnchor:safeAreaLayoutGuide.topAnchor]];
[self.compassViewConstraints addObject:[safeAreaLayoutGuide.rightAnchor constraintEqualToAnchor:self.compassView.rightAnchor
constant:8.0 + self.contentInset.right]];
[self addConstraints:self.compassViewConstraints];
// scale bar view
[self removeConstraints:self.scaleBarConstraints];
[self.scaleBarConstraints removeAllObjects];
[self.scaleBarConstraints addObject:[self constraintForYAxisAnchor:self.scaleBar.topAnchor belowAnchor:safeAreaLayoutGuide.topAnchor]];
[self.scaleBarConstraints addObject:[self.scaleBar.leftAnchor constraintEqualToAnchor:safeAreaLayoutGuide.leftAnchor
constant:8.0 + self.contentInset.left]];
[self addConstraints:self.scaleBarConstraints];
// logo view
[self removeConstraints:self.logoViewConstraints];
[self.logoViewConstraints removeAllObjects];
[self.logoViewConstraints addObject:[self constraintForYAxisAnchor:safeAreaLayoutGuide.bottomAnchor belowAnchor:self.logoView.bottomAnchor]];
[self.logoViewConstraints addObject:[self.logoView.leftAnchor constraintEqualToAnchor:safeAreaLayoutGuide.leftAnchor
constant:8.0 + self.contentInset.left]];
[self addConstraints:self.logoViewConstraints];
// attribution button
[self removeConstraints:self.attributionButtonConstraints];
[self.attributionButtonConstraints removeAllObjects];
[self.attributionButtonConstraints addObject:[self constraintForYAxisAnchor:safeAreaLayoutGuide.bottomAnchor belowAnchor:self.attributionButton.bottomAnchor]];
[self.attributionButtonConstraints addObject:[safeAreaLayoutGuide.rightAnchor constraintEqualToAnchor:self.attributionButton.rightAnchor
constant:8.0 + self.contentInset.right]];
[self addConstraints:self.attributionButtonConstraints];
} else {
[self updateConstraintsPreiOS11];
}
[super updateConstraints];
}
- (NSLayoutConstraint *)constraintForYAxisAnchor:(NSLayoutYAxisAnchor *)yAxisAnchor belowAnchor:(NSLayoutYAxisAnchor *)anchor
{
if (@available(iOS 11.0, *)) {
return [yAxisAnchor constraintEqualToSystemSpacingBelowAnchor:anchor multiplier:1];
} else {
return nil;
}
}
- (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 || ! _rendererFrontend)
{
_rendererFrontend->render();
[self updateUserLocationAnnotationView];
}
}
// This gets called when the view dimension changes, e.g. because the device is being rotated.
- (void)layoutSubviews
{
// Calling this here instead of in the scale bar itself because if this is done in the
// scale bar instance, it triggers a call to this this `layoutSubviews` method that
// calls `_mbglMap->setSize()` just below that triggers rendering update which triggers
// another scale bar update which causes a rendering update loop and a major performace
// degradation. The only time the scale bar's intrinsic content size _must_ invalidated
// is here as a reaction to this object's view dimension changes.
[self.scaleBar invalidateIntrinsicContentSize];
[super layoutSubviews];
[self adjustContentInset];
if (!_isTargetingInterfaceBuilder) {
_mbglMap->setSize([self size]);
}
if (self.compassView.alpha)
{
[self updateCompass];
}
if (self.compassView.alpha || self.showsUserHeadingIndicator)
{
[self updateHeadingForDeviceOrientation];
}
[self updateUserLocationAnnotationView];
}
/// 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.