75 lines
2.5 KiB
Objective-C
75 lines
2.5 KiB
Objective-C
#import "MGLSource.h"
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#include <memory>
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NS_ASSUME_NONNULL_BEGIN
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namespace mbgl {
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namespace style {
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class Source;
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}
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}
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// A struct to be stored in the `peer` member of mbgl::style::Source, in order to implement
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// object identity. We don't store a MGLSource pointer directly because that doesn't
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// interoperate with ARC. The inner pointer is weak in order to avoid a reference cycle for
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// "pending" MGLSources, which have a strong owning pointer to the mbgl::style::Source.
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struct SourceWrapper {
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__weak MGLSource *source;
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};
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@class MGLMapView;
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@interface MGLSource (Private)
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/**
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Initializes and returns a source with a raw pointer to the backing store,
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associated with a style.
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*/
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- (instancetype)initWithRawSource:(mbgl::style::Source *)rawSource mapView:(nullable MGLMapView *)mapView;
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/**
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Initializes and returns a source with an owning pointer to the backing store,
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unassociated from a style.
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*/
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- (instancetype)initWithPendingSource:(std::unique_ptr<mbgl::style::Source>)pendingSource;
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/**
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A raw pointer to the mbgl object, which is always initialized, either to the
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value returned by `mbgl::Map getSource`, or for independently created objects,
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to the pointer value held in `pendingSource`. In the latter case, this raw
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pointer value stays even after ownership of the object is transferred via
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`mbgl::Map addSource`.
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*/
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@property (nonatomic, readonly) mbgl::style::Source *rawSource;
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/**
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The map view whose style currently contains the source.
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If the source is not currently part of any map view’s style, this property is
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set to `nil`.
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*/
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@property (nonatomic, readonly, weak) MGLMapView *mapView;
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/**
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Adds the mbgl source that this object represents to the mbgl map.
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Once a mbgl source is added, ownership of the object is transferred to the
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`mbgl::Map` and this object no longer has an active unique_ptr reference to the
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`mbgl::Source`. If this object's mbgl source is in that state, the mbgl source
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can still be changed but the changes will not be visible until the `MGLSource`
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is added back to the map via `-[MGLStyle addSource:]` and styled with a
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`MGLLayer`.
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*/
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- (void)addToMapView:(MGLMapView *)mapView;
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/**
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Removes the mbgl source that this object represents from the mbgl map.
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When a mbgl source is removed, ownership of the object is transferred back
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to the `MGLSource` instance and the unique_ptr reference is valid again. It is
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safe to add the source back to the style after it is removed.
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*/
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- (BOOL)removeFromMapView:(MGLMapView *)mapView error:(NSError * __nullable * __nullable)outError;
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@end
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NS_ASSUME_NONNULL_END
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