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#import "MGLMapAccessibilityElement.h"
#import "MGLDistanceFormatter.h"
#import "MGLCompassDirectionFormatter.h"
#import "MGLFeature.h"
#import "MGLGeometry_Private.h"
#import "MGLVectorTileSource_Private.h"
#import "NSBundle+MGLAdditions.h"
#import "NSOrthography+MGLAdditions.h"
#import "NSString+MGLAdditions.h"
@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 *languageCode = [MGLVectorTileSource preferredMapboxStreetsLanguage];
NSString *nameAttribute = [NSString stringWithFormat:@"name_%@", languageCode];
NSString *name = [feature attributeForKey:nameAttribute];
// If a feature hasn’t been translated into the preferred language, it
// may be in the local language, which may be written in another script.
// Attempt to transform to the script of the preferred language, keeping
// the original string if no transform exists or if transformation fails.
if (@available(iOS 9.0, *)) {
NSString *dominantScript = [NSOrthography mgl_dominantScriptForMapboxStreetsLanguage:languageCode];
name = [name mgl_stringByTransliteratingIntoScript:dominantScript];
}
self.accessibilityLabel = name;
}
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"]];
}
// Announce the peak’s elevation in the preferred units.
if (attributes[@"elevation_m"] ?: attributes[@"elevation_ft"]) {
NSLengthFormatter *formatter = [[NSLengthFormatter alloc] init];
formatter.unitStyle = NSFormattingUnitStyleLong;
NSNumber *elevationValue;
NSLengthFormatterUnit unit;
BOOL usesMetricSystem = ![[formatter.numberFormatter.locale objectForKey:NSLocaleMeasurementSystem]
isEqualToString:@"U.S."];
if (usesMetricSystem) {
elevationValue = attributes[@"elevation_m"];
unit = NSLengthFormatterUnitMeter;
} else {
elevationValue = attributes[@"elevation_ft"];
unit = NSLengthFormatterUnitFoot;
}
[facts addObject:[formatter stringFromValue:elevationValue.doubleValue unit:unit]];
}
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 one-way road.
if ([attributes[@"oneway"] isEqualToString:@"true"]) {
[facts addObject:NSLocalizedStringWithDefaultValue(@"ROAD_ONEWAY_A11Y_VALUE", nil, nil, @"One way", @"Accessibility value indicating that a road is a one-way road")];
}
// Announce whether the road is a divided road.
MGLPolyline *polyline;
if ([feature isKindOfClass:[MGLMultiPolylineFeature class]]) {
[facts addObject:NSLocalizedStringWithDefaultValue(@"ROAD_DIVIDED_A11Y_VALUE", nil, nil, @"Divided road", @"Accessibility value indicating that a road is a divided road (dual carriageway)")];
polyline = [(MGLMultiPolylineFeature *)feature polylines].firstObject;
}
// Announce the road’s general direction.
if ([feature isKindOfClass:[MGLPolylineFeature class]]) {
polyline = (MGLPolylineFeature *)feature;
}
if (polyline) {
NSUInteger pointCount = polyline.pointCount;
if (pointCount) {
CLLocationCoordinate2D *coordinates = polyline.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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