Query visible features in a single MGLStyleLayer

[1ec5]

#6514 will add additional options for querying features by source rather than (or in addition to) by layer. We’ll need to add additional methods to MGLMapView like -[MGLMapView visibleFeaturesAtPoint:inSourcesWithIdentifiers:] and -[MGLMapView visibleFeaturesInRect:inSourcesWithIdentifiers:].

/cc @boundsj @frederoni

[1ec5]

This gets me thinking: most of the time, a developer is querying either a set of layers that are baked into the style or a single layer that they’ve added at runtime. It would be more convenient and object oriented to be able to say:

-[MGLStyleLayer visibleFeaturesAtPoint:]
-[MGLStyleLayer visibleFeaturesInRect:]
-[MGLSource visibleFeaturesAtPoint:]
-[MGLSource visibleFeaturesInRect:]

[1ec5]

Per #5110 (comment), we may also want to consider a new API that takes an MGLFeatureQuery object or somesuch, to stop the proliferation of querying methods on MGLMapView.

[1ec5]

#6514 ended up taking a different approach. Repurposing this ticket to cover the MGLStyleLayer convenience methods described in #6520 (comment):

-[MGLStyleLayer visibleFeaturesAtPoint:]
-[MGLStyleLayer visibleFeaturesInRect:]

[stale]

This issue has been automatically detected as stale because it has not had recent activity and will be archived. Thank you for your contributions.