Upgrade to post-Objective-C MapboxDirections.swift #2275
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JThramer
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In addition to the feedback below, please audit all other usage of the Polyline() initializer. There are plenty of opportunities to eliminate excessive copying of coordinate arrays, for example here where routeLine comes from a step’s shape property, which is already a Polyline:
1ec5
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Dec 17, 2019
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| extension Route { | ||
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| var json: String? { |
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Encoding as JSON is expensive enough that we probably shouldn’t hand-wave away the fact that this computed variable creates a new structure every time it is accessed. Instead, make it a method.
Once we implement mapbox/mapbox-directions-swift#391, the original JSON data can live alongside the decoded Route in a Response object.
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Dec 19, 2019
1ec5
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Dec 20, 2019
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This PR blocks #2114: #2114 (comment). |
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Rely on encoding and decoding to copy the object instead of manually copying each individual property, which is error-prone (and incomplete).
route-doubling-back.json was apparently generated with 5 digits of precision.
Coordinates are now round-tripped through Polyline encoding, so they get rounded to 5 or 6 places. What matters is that they’re still really close to the mark in terms of physical distances.
Build up a single attributed string as a container, embedding abbreviations in attributes.
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This PR is to track integration between #2230 (now merged) and mapbox/mapbox-directions-swift#382.
Burn-down list:
NSCoder->CodablerefactoringsRouteOptionsDepends on mapbox/mapbox-directions-swift#393.
/cc @mapbox/navigation-ios