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#import "MGLPolyline_Private.h"
#import "MGLMultiPoint_Private.h"
#import "MGLGeometry_Private.h"
#import "MGLFeature.h"
#import <mbgl/util/geojson.hpp>
#import <mapbox/polylabel.hpp>
@implementation MGLPolyline
@dynamic overlayBounds;
+ (instancetype)polylineWithCoordinates:(const CLLocationCoordinate2D *)coords
count:(NSUInteger)count
{
return [[self alloc] initWithCoordinates:coords count:count];
}
- (mbgl::LineString<double>)lineString {
NSUInteger count = self.pointCount;
CLLocationCoordinate2D *coordinates = self.coordinates;
mbgl::LineString<double> geometry;
geometry.reserve(self.pointCount);
for (NSUInteger i = 0; i < count; i++) {
geometry.push_back(mbgl::Point<double>(coordinates[i].longitude, coordinates[i].latitude));
}
return geometry;
}
- (mbgl::Annotation)annotationObjectWithDelegate:(id <MGLMultiPointDelegate>)delegate {
mbgl::LineAnnotation annotation { [self lineString] };
annotation.opacity = { static_cast<float>([delegate alphaForShapeAnnotation:self]) };
annotation.color = { [delegate strokeColorForShapeAnnotation:self] };
annotation.width = { static_cast<float>([delegate lineWidthForPolylineAnnotation:self]) };
return annotation;
}
- (mbgl::Geometry<double>)geometryObject {
return [self lineString];
}
- (NSDictionary *)geoJSONDictionary {
return @{@"type": @"LineString",
@"coordinates": self.mgl_coordinates};
}
- (NS_ARRAY_OF(id) *)mgl_coordinates {
NSMutableArray *coordinates = [[NSMutableArray alloc] initWithCapacity:self.pointCount];
for (NSUInteger index = 0; index < self.pointCount; index++) {
CLLocationCoordinate2D coordinate = self.coordinates[index];
[coordinates addObject:@[@(coordinate.longitude), @(coordinate.latitude)]];
}
return [coordinates copy];
}
- (BOOL)isEqual:(id)other {
return self == other || ([other isKindOfClass:[MGLPolyline class]] && [super isEqual:other]);
}
- (CLLocationCoordinate2D)coordinate {
NSUInteger count = self.pointCount;
NSAssert(count > 0, @"Polyline must have coordinates");
CLLocationCoordinate2D *coordinates = self.coordinates;
CLLocationDistance middle = [self length] / 2.0;
CLLocationDistance traveled = 0.0;
if (count > 1 || middle > traveled) {
for (NSUInteger i = 0; i < count; i++) {
// Avoid a heap buffer overflow when there are only two coordinates.
NSUInteger nextIndex = (i + 1 == count) ? 0 : 1;
MGLRadianCoordinate2D from = MGLRadianCoordinateFromLocationCoordinate(coordinates[i]);
MGLRadianCoordinate2D to = MGLRadianCoordinateFromLocationCoordinate(coordinates[i + nextIndex]);
if (traveled >= middle) {
double overshoot = middle - traveled;
if (overshoot == 0) {
return coordinates[i];
}
to = MGLRadianCoordinateFromLocationCoordinate(coordinates[i - 1]);
CLLocationDirection direction = [self direction:from to:to] - 180;
MGLRadianCoordinate2D otherCoordinate = MGLRadianCoordinateAtDistanceFacingDirection(from,
overshoot/mbgl::util::EARTH_RADIUS_M,
MGLRadiansFromDegrees(direction));
return CLLocationCoordinate2DMake(MGLDegreesFromRadians(otherCoordinate.latitude),
MGLDegreesFromRadians(otherCoordinate.longitude));
}
traveled += (MGLDistanceBetweenRadianCoordinates(from, to) * mbgl::util::EARTH_RADIUS_M);
}
}
return coordinates[count - 1];
}
- (CLLocationDistance)length
{
CLLocationDistance length = 0.0;
NSUInteger count = self.pointCount;
CLLocationCoordinate2D *coordinates = self.coordinates;
for (NSUInteger i = 0; i < count - 1; i++) {
length += (MGLDistanceBetweenRadianCoordinates(MGLRadianCoordinateFromLocationCoordinate(coordinates[i]), MGLRadianCoordinateFromLocationCoordinate(coordinates[i + 1])) * mbgl::util::EARTH_RADIUS_M);
}
return length;
}
- (CLLocationDirection)direction:(MGLRadianCoordinate2D)from to:(MGLRadianCoordinate2D)to
{
return MGLDegreesFromRadians(MGLRadianCoordinatesDirection(from, to));
}
@end
@interface MGLMultiPolyline ()
@property (nonatomic, copy, readwrite) NS_ARRAY_OF(MGLPolyline *) *polylines;
@end
@implementation MGLMultiPolyline {
MGLCoordinateBounds _overlayBounds;
}
@synthesize overlayBounds = _overlayBounds;
+ (instancetype)multiPolylineWithPolylines:(NS_ARRAY_OF(MGLPolyline *) *)polylines {
return [[self alloc] initWithPolylines:polylines];
}
- (instancetype)initWithPolylines:(NS_ARRAY_OF(MGLPolyline *) *)polylines {
if (self = [super init]) {
_polylines = polylines;
mbgl::LatLngBounds bounds = mbgl::LatLngBounds::empty();
for (MGLPolyline *polyline in _polylines) {
bounds.extend(MGLLatLngBoundsFromCoordinateBounds(polyline.overlayBounds));
}
_overlayBounds = MGLCoordinateBoundsFromLatLngBounds(bounds);
}
return self;
}
- (instancetype)initWithCoder:(NSCoder *)decoder {
if (self = [super initWithCoder:decoder]) {
_polylines = [decoder decodeObjectOfClass:[NSArray class] forKey:@"polylines"];
}
return self;
}
- (void)encodeWithCoder:(NSCoder *)coder {
[super encodeWithCoder:coder];
[coder encodeObject:_polylines forKey:@"polylines"];
}
- (BOOL)isEqual:(id)other
{
if (self == other) return YES;
if (![other isKindOfClass:[MGLMultiPolyline class]]) return NO;
MGLMultiPolyline *otherMultipoline = other;
return ([super isEqual:otherMultipoline]
&& [self.polylines isEqualToArray:otherMultipoline.polylines]);
}
- (NSUInteger)hash {
NSUInteger hash = [super hash];
for (MGLPolyline *polyline in self.polylines) {
hash += [polyline hash];
}
return hash;
}
- (CLLocationCoordinate2D)coordinate {
MGLPolyline *polyline = self.polylines.firstObject;
CLLocationCoordinate2D *coordinates = polyline.coordinates;
NSAssert([polyline pointCount] > 0, @"Polyline must have coordinates");
CLLocationCoordinate2D firstCoordinate = coordinates[0];
return firstCoordinate;
}
- (BOOL)intersectsOverlayBounds:(MGLCoordinateBounds)overlayBounds {
return MGLCoordinateBoundsIntersectsCoordinateBounds(_overlayBounds, overlayBounds);
}
- (mbgl::Geometry<double>)geometryObject {
mbgl::MultiLineString<double> multiLineString;
multiLineString.reserve(self.polylines.count);
for (MGLPolyline *polyline in self.polylines) {
multiLineString.push_back([polyline lineString]);
}
return multiLineString;
}
- (NSDictionary *)geoJSONDictionary {
NSMutableArray *coordinates = [NSMutableArray array];
for (MGLPolylineFeature *feature in self.polylines) {
[coordinates addObject: feature.mgl_coordinates];
}
return @{@"type": @"MultiLineString",
@"coordinates": coordinates};
}
- (NSString *)description
{
return [NSString stringWithFormat:@"<%@: %p; title = %@, subtitle: = %@, count = %lu; bounds = %@>",
NSStringFromClass([self class]), (void *)self,
self.title ? [NSString stringWithFormat:@"\"%@\"", self.title] : self.title,
self.subtitle ? [NSString stringWithFormat:@"\"%@\"", self.subtitle] : self.subtitle,
(unsigned long)self.polylines.count,
MGLStringFromCoordinateBounds(self.overlayBounds)];
}
@end
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