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#import "MGLMapAccessibilityElement.h"
#import "MGLDistanceFormatter.h"
#import "MGLCompassDirectionFormatter.h"
#import "MGLFeature.h"
#import "MGLVectorSource+MGLAdditions.h"
#import "NSBundle+MGLAdditions.h"
typedef CLLocationDegrees MGLLocationRadians;
typedef CLLocationDirection MGLRadianDirection;
typedef struct {
MGLLocationRadians latitude;
MGLLocationRadians longitude;
} MGLRadianCoordinate2D;
MGLRadianCoordinate2D MGLRadianCoordinate2DMake(MGLLocationRadians latitude, MGLLocationRadians longitude) {
MGLRadianCoordinate2D radianCoordinate = {
.latitude = latitude,
.longitude = longitude,
};
return radianCoordinate;
}
MGLRadianCoordinate2D MGLRadianCoordinate2DFromLocationCoordinate2D(CLLocationCoordinate2D degreeCoordinate) {
return MGLRadianCoordinate2DMake(degreeCoordinate.latitude * M_PI / 180, degreeCoordinate.longitude * M_PI / 180);
}
/** Returns the direction from one coordinate to another. */
CLLocationDirection MGLDirectionBetweenCoordinates(CLLocationCoordinate2D firstCoordinate, CLLocationCoordinate2D secondCoordinate) {
// Ported from https://github.com/mapbox/turf-swift/blob/857e2e8060678ef4a7a9169d4971b0788fdffc37/Turf/Turf.swift#L23-L31
MGLRadianCoordinate2D firstRadianCoordinate = MGLRadianCoordinate2DFromLocationCoordinate2D(firstCoordinate);
MGLRadianCoordinate2D secondRadianCoordinate = MGLRadianCoordinate2DFromLocationCoordinate2D(secondCoordinate);
CGFloat a = sin(secondRadianCoordinate.longitude - firstRadianCoordinate.longitude) * cos(secondRadianCoordinate.latitude);
CGFloat b = (cos(firstRadianCoordinate.latitude) * sin(secondRadianCoordinate.latitude)
- sin(firstRadianCoordinate.latitude) * cos(secondRadianCoordinate.latitude) * cos(secondRadianCoordinate.longitude - firstRadianCoordinate.longitude));
MGLRadianDirection radianDirection = atan2(a, b);
return radianDirection * 180 / M_PI;
}
@implementation MGLMapAccessibilityElement
- (UIAccessibilityTraits)accessibilityTraits {
return super.accessibilityTraits | UIAccessibilityTraitAdjustable;
}
- (void)accessibilityIncrement {
[self.accessibilityContainer accessibilityIncrement];
}
- (void)accessibilityDecrement {
[self.accessibilityContainer accessibilityDecrement];
}
@end
@implementation MGLAnnotationAccessibilityElement
- (instancetype)initWithAccessibilityContainer:(id)container tag:(MGLAnnotationTag)tag {
if (self = [super initWithAccessibilityContainer:container]) {
_tag = tag;
self.accessibilityHint = NSLocalizedStringWithDefaultValue(@"ANNOTATION_A11Y_HINT", nil, nil, @"Shows more info", @"Accessibility hint");
}
return self;
}
- (UIAccessibilityTraits)accessibilityTraits {
return super.accessibilityTraits | UIAccessibilityTraitButton;
}
@end
@implementation MGLFeatureAccessibilityElement
- (instancetype)initWithAccessibilityContainer:(id)container feature:(id<MGLFeature>)feature {
if (self = [super initWithAccessibilityContainer:container]) {
_feature = feature;
NSString *nameAttribute = [NSString stringWithFormat:@"name_%@",
[MGLVectorSource preferredMapboxStreetsLanguage]];
self.accessibilityLabel = [feature attributeForKey:nameAttribute];
}
return self;
}
- (UIAccessibilityTraits)accessibilityTraits {
return super.accessibilityTraits | UIAccessibilityTraitStaticText;
}
@end
@implementation MGLPlaceFeatureAccessibilityElement
- (instancetype)initWithAccessibilityContainer:(id)container feature:(id<MGLFeature>)feature {
if (self = [super initWithAccessibilityContainer:container feature:feature]) {
NSDictionary *attributes = feature.attributes;
NSMutableArray *facts = [NSMutableArray array];
// Announce the kind of place or POI.
if (attributes[@"type"]) {
// FIXME: Unfortunately, these types aren’t a closed set that can be
// localized, since they’re based on OpenStreetMap tags.
NSString *type = [attributes[@"type"] stringByReplacingOccurrencesOfString:@"_"
withString:@" "];
[facts addObject:type];
}
// Announce the kind of airport, rail station, or mountain based on its
// Maki image name.
else if (attributes[@"maki"]) {
// TODO: Localize Maki image names.
[facts addObject:attributes[@"maki"]];
}
NSNumber *elevation = attributes[@"elevation_m"];
if (elevation) {
MGLDistanceFormatter *formatter = [[MGLDistanceFormatter alloc] init];
formatter.unitStyle = NSFormattingUnitStyleLong;
[facts addObject:[formatter stringFromDistance:elevation.doubleValue]];
}
if (facts.count) {
NSString *separator = NSLocalizedStringWithDefaultValue(@"LIST_SEPARATOR", nil, nil, @", ", @"List separator");
self.accessibilityValue = [facts componentsJoinedByString:separator];
}
}
return self;
}
@end
@implementation MGLRoadFeatureAccessibilityElement
- (instancetype)initWithAccessibilityContainer:(id)container feature:(id<MGLFeature>)feature {
if (self = [super initWithAccessibilityContainer:container feature:feature]) {
NSDictionary *attributes = feature.attributes;
NSMutableArray *facts = [NSMutableArray array];
// Announce the route number.
if (attributes[@"ref"]) {
// TODO: Decorate the route number with the network name based on the shield attribute.
NSString *ref = [NSString stringWithFormat:NSLocalizedStringWithDefaultValue(@"ROAD_REF_A11Y_FMT", nil, nil, @"Route %@", @"String format for accessibility value for road feature; {route number}"), attributes[@"ref"]];
[facts addObject:ref];
}
// Announce whether the road is a divided road.
if ([feature isKindOfClass:[MGLShapeCollectionFeature class]]) {
[facts addObject:NSLocalizedStringWithDefaultValue(@"ROAD_DIVIDED_A11Y_VALUE", nil, nil, @"Divided road", @"Accessibility value indicating that a road is a divided road (dual carriageway)")];
feature = [(MGLShapeCollectionFeature *)feature shapes].firstObject;
}
// Announce the road’s general direction.
if ([feature isKindOfClass:[MGLPolylineFeature class]]) {
NSUInteger pointCount = [(MGLPolylineFeature *)feature pointCount];
if (pointCount) {
CLLocationCoordinate2D *coordinates = [(MGLPolyline *)feature coordinates];
CLLocationDirection startDirection = MGLDirectionBetweenCoordinates(coordinates[pointCount - 1], coordinates[0]);
CLLocationDirection endDirection = MGLDirectionBetweenCoordinates(coordinates[0], coordinates[pointCount - 1]);
MGLCompassDirectionFormatter *formatter = [[MGLCompassDirectionFormatter alloc] init];
formatter.unitStyle = NSFormattingUnitStyleLong;
NSString *startDirectionString = [formatter stringFromDirection:startDirection];
NSString *endDirectionString = [formatter stringFromDirection:endDirection];
NSString *directionString = [NSString stringWithFormat:NSLocalizedStringWithDefaultValue(@"ROAD_DIRECTION_A11Y_FMT", nil, nil, @"%@ to %@", @"String format for accessibility value for road feature; {starting compass direction}, {ending compass direction}"), startDirectionString, endDirectionString];
[facts addObject:directionString];
}
}
if (facts.count) {
NSString *separator = NSLocalizedStringWithDefaultValue(@"LIST_SEPARATOR", nil, nil, @", ", @"List separator");
self.accessibilityValue = [facts componentsJoinedByString:separator];
}
}
return self;
}
@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
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