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MGLMapView.mm
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#import "MGLMapView_Private.h"
#include <mbgl/platform/log.hpp>
#include <mbgl/gl/extension.hpp>
#include <mbgl/gl/context.hpp>
#import <GLKit/GLKit.h>
#import <OpenGLES/EAGL.h>
#include <mbgl/mbgl.hpp>
#include <mbgl/annotation/annotation.hpp>
#include <mbgl/sprite/sprite_image.hpp>
#include <mbgl/map/camera.hpp>
#include <mbgl/map/mode.hpp>
#include <mbgl/platform/platform.hpp>
#include <mbgl/platform/darwin/reachability.h>
#include <mbgl/platform/default/thread_pool.hpp>
#include <mbgl/storage/default_file_source.hpp>
#include <mbgl/storage/network_status.hpp>
#include <mbgl/style/transition_options.hpp>
#include <mbgl/style/layers/custom_layer.hpp>
#include <mbgl/map/backend.hpp>
#include <mbgl/math/wrap.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>
#import "Mapbox.h"
#import "MGLFeature_Private.h"
#import "MGLGeometry_Private.h"
#import "MGLMultiPoint_Private.h"
#import "MGLOfflineStorage_Private.h"
#import "NSBundle+MGLAdditions.h"
#import "NSDate+MGLAdditions.h"
#import "NSString+MGLAdditions.h"
#import "NSProcessInfo+MGLAdditions.h"
#import "NSException+MGLAdditions.h"
#import "NSURL+MGLAdditions.h"
#import "UIImage+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 "MGLStyle_Private.h"
#import "MGLStyleLayer_Private.h"
#import "MGLMapboxEvents.h"
#import "MGLCompactCalloutView.h"
#import "MGLAnnotationContainerView.h"
#import "MGLAnnotationContainerView_Private.h"
#import "MGLAttributionInfo.h"
#import "MGLScaleControlView.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 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;
/// 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);
/// 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;
/// Initializes the run loop shim that lives on the main thread.
void MGLinitializeRunLoop() {
static mbgl::util::RunLoop mainRunLoop;
}
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 = @"Returns to the map";
}
return self;
}
@end
#pragma mark - Private -
@interface MGLMapView () <UIGestureRecognizerDelegate,
GLKViewDelegate,
CLLocationManagerDelegate,
UIActionSheetDelegate,
SMCalloutViewDelegate,
MGLCalloutViewDelegate,
UIAlertViewDelegate,
MGLMultiPointDelegate,
MGLAnnotationImageDelegate>
@property (nonatomic) EAGLContext *context;
@property (nonatomic) GLKView *glView;
@property (nonatomic) UIImageView *glSnapshotView;
@property (nonatomic, readwrite) MGLScaleControlView *scaleControlView;
@property (nonatomic) NS_MUTABLE_ARRAY_OF(NSLayoutConstraint *) *scaleControlViewConstraints;
@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) UIActionSheet *attributionSheet;
@property (nonatomic, readwrite) MGLStyle *style;
@property (nonatomic) UITapGestureRecognizer *singleTapGestureRecognizer;
@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;
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;
BOOL _delegateHasAlphasForShapeAnnotations;
BOOL _delegateHasStrokeColorsForShapeAnnotations;
BOOL _delegateHasFillColorsForShapeAnnotations;
BOOL _delegateHasLineWidthsForShapeAnnotations;
MGLCompassDirectionFormatter *_accessibilityCompassFormatter;
NS_ARRAY_OF(MGLAttributionInfo *) *_attributionInfos;
}
#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;
}
+ (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 willChangeValueForKey:@"style"];
_style = [[MGLStyle alloc] initWithMapView:self];
_mbglMap->setStyleURL([[styleURL absoluteString] UTF8String]);
[self didChangeValueForKey:@"style"];
}
- (IBAction)reloadStyle:(__unused id)sender {
NSURL *styleURL = self.styleURL;
_mbglMap->setStyleURL("");
self.styleURL = styleURL;
}
- (mbgl::Map *)mbglMap
{
return _mbglMap;
}
- (void)commonInit
{
MGLinitializeRunLoop();
_isTargetingInterfaceBuilder = NSProcessInfo.processInfo.mgl_isInterfaceBuilderDesignablesAgent;
_opaque = YES;
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
const std::array<uint16_t, 2> size = {{ static_cast<uint16_t>(self.bounds.size.width),
static_cast<uint16_t>(self.bounds.size.height) }};
mbgl::DefaultFileSource *mbglFileSource = [MGLOfflineStorage sharedOfflineStorage].mbglFileSource;
const float scaleFactor = [UIScreen instancesRespondToSelector:@selector(nativeScale)] ? [[UIScreen mainScreen] nativeScale] : [[UIScreen mainScreen] scale];
_mbglThreadPool = new mbgl::ThreadPool(4);
_mbglMap = new mbgl::Map(*_mbglView, 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];
MGLReachability* 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.png"] imageWithAlignmentRectInsets:UIEdgeInsetsMake(1.5, 4, 3.5, 2)];
_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];
// 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
//
_scaleControlView = [[MGLScaleControlView alloc] init];
_scaleControlView.translatesAutoresizingMaskIntoConstraints = NO;
[self addSubview:_scaleControlView];
_scaleControlViewConstraints = [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;
UITapGestureRecognizer *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];
UITapGestureRecognizer *twoFingerTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTwoFingerTapGesture:)];
twoFingerTap.numberOfTouchesRequired = 2;
[twoFingerTap requireGestureRecognizerToFail:_pinch];
[twoFingerTap requireGestureRecognizerToFail:_rotate];
[self addGestureRecognizer:twoFingerTap];
_twoFingerDrag = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handleTwoFingerDragGesture:)];
_twoFingerDrag.minimumNumberOfTouches = 2;
_twoFingerDrag.maximumNumberOfTouches = 2;
_twoFingerDrag.delegate = self;
[_twoFingerDrag requireGestureRecognizerToFail:twoFingerTap];
[_twoFingerDrag requireGestureRecognizerToFail:_pan];
[self addGestureRecognizer:_twoFingerDrag];
_pitchEnabled = YES;
_decelerationRate = MGLMapViewDecelerationRateNormal;
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
{
_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:@{}];
}
}
- (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;
// load extensions
//
mbgl::gl::InitializeExtensions([](const char * name) {
static CFBundleRef framework = CFBundleGetBundleWithIdentifier(CFSTR("com.apple.opengles"));
if (!framework) {
throw std::runtime_error("Failed to load OpenGL framework.");
}
CFStringRef str = CFStringCreateWithCString(kCFAllocatorDefault, name, kCFStringEncodingASCII);
void* symbol = CFBundleGetFunctionPointerForName(framework, str);
CFRelease(str);
return reinterpret_cast<mbgl::gl::glProc>(symbol);
});
}
- (UIImage *)compassImage
{
UIImage *scaleImage = [MGLMapView resourceImageNamed:@"Compass.png"];
UIGraphicsBeginImageContextWithOptions(scaleImage.size, NO, [UIScreen mainScreen].scale);
[scaleImage drawInRect:{ CGPointZero, scaleImage.size }];
CGFloat northSize = 9;
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 * 0.45,
north.size.width, north.size.height);
[north drawInRect:stringRect];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
- (void)reachabilityChanged:(NSNotification *)notification
{
MGLReachability *reachability = [notification object];
if ( ! _isWaitingForRedundantReachableNotification && [reachability isReachable])
{
mbgl::NetworkStatus::Reachable();
}
_isWaitingForRedundantReachableNotification = NO;
}
- (void)dealloc
{
[[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 (_mbglThreadPool)
{
delete _mbglThreadPool;
_mbglThreadPool = nullptr;
}
if ([[EAGLContext currentContext] isEqual:_context])
{
[EAGLContext setCurrentContext: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
{
_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
{
// scale control
//
[self removeConstraints:self.scaleControlViewConstraints];
[self.scaleControlViewConstraints removeAllObjects];
[self.scaleControlViewConstraints addObject:
[NSLayoutConstraint constraintWithItem:self.scaleControlView
attribute:NSLayoutAttributeTop
relatedBy:NSLayoutRelationEqual
toItem:self
attribute:NSLayoutAttributeTop
multiplier:1
constant:5+self.contentInset.top]];
[self.scaleControlViewConstraints addObject:
[NSLayoutConstraint constraintWithItem:self.scaleControlView
attribute:NSLayoutAttributeLeading
relatedBy:NSLayoutRelationEqual
toItem:self
attribute:NSLayoutAttributeLeading
multiplier:1
constant:8 + self.contentInset.left]];
[self addConstraints:self.scaleControlViewConstraints];
// compass
//
[self removeConstraints:self.compassViewConstraints];
[self.compassViewConstraints removeAllObjects];
[self.compassViewConstraints addObject:
[NSLayoutConstraint constraintWithItem:self.compassView
attribute:NSLayoutAttributeTop
relatedBy:NSLayoutRelationEqual
toItem:self
attribute:NSLayoutAttributeTop
multiplier:1
constant:5 + self.contentInset.top]];
[self.compassViewConstraints addObject:
[NSLayoutConstraint constraintWithItem:self
attribute:NSLayoutAttributeTrailing
relatedBy:NSLayoutRelationEqual
toItem:self.compassView
attribute:NSLayoutAttributeTrailing
multiplier:1
constant:5 + self.contentInset.right]];
[self addConstraints:self.compassViewConstraints];
// logo bug
//
[self removeConstraints:self.logoViewConstraints];
[self.logoViewConstraints removeAllObjects];
[self.logoViewConstraints addObject:
[NSLayoutConstraint constraintWithItem:self
attribute:NSLayoutAttributeBottom
relatedBy:NSLayoutRelationEqual
toItem:self.logoView
attribute:NSLayoutAttributeBaseline
multiplier:1
constant:8 + self.contentInset.bottom]];
[self.logoViewConstraints addObject:
[NSLayoutConstraint constraintWithItem:self.logoView
attribute:NSLayoutAttributeLeading
relatedBy:NSLayoutRelationEqual
toItem:self
attribute:NSLayoutAttributeLeading
multiplier:1
constant:8 + self.contentInset.left]];
[self addConstraints:self.logoViewConstraints];
// attribution button
//
[self removeConstraints:self.attributionButtonConstraints];
[self.attributionButtonConstraints removeAllObjects];
[self.attributionButtonConstraints addObject:
[NSLayoutConstraint constraintWithItem:self
attribute:NSLayoutAttributeBottom
relatedBy:NSLayoutRelationEqual
toItem:self.attributionButton
attribute:NSLayoutAttributeBaseline
multiplier:1
constant:8 + self.contentInset.bottom]];
[self.attributionButtonConstraints addObject:
[NSLayoutConstraint constraintWithItem:self
attribute:NSLayoutAttributeTrailing
relatedBy:NSLayoutRelationEqual
toItem:self.attributionButton
attribute:NSLayoutAttributeTrailing
multiplier:1
constant:8 + self.contentInset.right]];
[self addConstraints:self.attributionButtonConstraints];
[super updateConstraints];
}
- (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)
{
_mbglView->updateViewBinding();
_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];
if ( ! _isTargetingInterfaceBuilder)
{
_mbglMap->setSize({{ static_cast<uint16_t>(self.bounds.size.width),
static_cast<uint16_t>(self.bounds.size.height) }});
}
if (self.attributionSheet.visible)
{
[self.attributionSheet dismissWithClickedButtonIndex:self.attributionSheet.cancelButtonIndex animated:YES];
}
if (self.compassView.alpha)
{
[self updateHeadingForDeviceOrientation];
[self updateCompass];
}
[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.
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];
}