When inserting an cached resource, or removing a region, remove least-recently used resources and tiles, not used by offline regions, until the used database size, as calculated by multiplying the number of in-use pages by the page size, is less than the maximum cache size minus 5 times the page size.
In addition, OfflineDatabase may be configured to ignore cache puts of individual resources larger than a certain size.
This policy is similar but not identical to the former SQLiteCache policy:
* It accounts for offline, by exempting resources required by offline regions from eviction.
* It must delete from two tables (resources and tiles), rather than one. Currently the strategy is naive: evict 50 rows at a time from each table.
* It makes maximumCacheSize and maximumCacheEntrySize completely independent. The SQLiteCache implementation evicted when `usedSize > maximumCacheSize - 2 * maximumCacheEntrySize`. This evicts when `usedSize > maximumCacheSize - 5 * pageSize`.
* It uses a non-unlimited default value for maximumCacheSize: 50 MB. We should have always had a limit in place; "a cache without an eviction policy is a resource leak".
There is no such thing as a cancelled response, only cancelled requests. A request that is cancelled does not have its callback called with a Response.
Implicit bool conversions are bad; they'll be used e.g. for a == b and a != b if those operators are not defined. This was happening at 032c8fba3c/src/mbgl/map/transform.cpp (L132-L132), for example.
* Use "named constructors": empty, world, hull
* Make the two-argument constructor lenient (i.e., it is a hull operation)
* Add various accessors
* Enforce a single empty representation
Renamed -showAnnotations:withEdgeInsets:animated: to -showAnnotations:edgePadding:animated: for consistency with other methods. Reworded documentation comments to avoid hard-coding too many specifics that are prone to getting outdated.
The tilt gesture on both iOS and OS X now respects the content insets. On iOS, in user tracking mode, it additionally respects the user dot’s position if it’s aligned to the top or bottom of the view.
When a targetCoordinate is specified in course tracking mode, the map automatically resizes the viewport to show both the user puck and the target, one at the top and the other at the bottom. The user puck now rotates its arrow in the course direction, no longer assuming that the viewport is facing the same way as the course.
Setting the user tracking mode without animation now works. Previously, it kept the user dot from ever updating.
Just as a zoom gesture no longer kicks the user out of user tracking mode, programmatically zooming shouldn’t either.
Setting a camera with an invalid center coordinate no longer attempts to change the center coordinate but still changes any other valid properties.
Made animation to new user dot vertical alignment optional.
This allows the FileSource interface itself to support revalidation. We could (and probably should) now rewrite HTTPContextBase implementations as FileSource implementations.
