Merge branch 'release-boba' into masterupstream/fabian-merge-v4.0.0

# Conflicts:
#	circle.yml
#	include/mbgl/style/expression/let.hpp
#	platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/geometry/LatLngBounds.java
#	platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapGestureDetector.java
#	platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapKeyListener.java
#	platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapView.java
#	platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapboxMap.java
#	platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/Projection.java
#	platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/Transform.java
#	platform/android/MapboxGLAndroidSDK/src/test/java/com/mapbox/mapboxsdk/geometry/LatLngBoundsTest.java
#	platform/android/MapboxGLAndroidSDKTestApp/src/main/AndroidManifest.xml
#	platform/android/gradle/dependencies.gradle
#	platform/android/src/example_custom_layer.cpp
#	platform/android/src/geojson/point.cpp
#	platform/darwin/src/NSPredicate+MGLAdditions.mm
#	platform/darwin/test/MGLExpressionTests.mm
#	platform/ios/Mapbox-iOS-SDK-nightly-dynamic.podspec
#	platform/ios/Mapbox-iOS-SDK-symbols.podspec
#	platform/ios/Mapbox-iOS-SDK.podspec
#	platform/ios/app/MBXViewController.m
#	src/mbgl/renderer/layers/render_custom_layer.cpp
#	src/mbgl/style/conversion/filter.cpp
#	src/mbgl/style/expression/interpolate.cpp
#	src/mbgl/style/expression/value.cpp
#	test/style/filter.test.cpp

1 files changed, 127 insertions, 4 deletions

diff --git a/platform/darwin/src/MGLShapeSource.h b/platform/darwin/src/MGLShapeSource.h
index 929609e91f..6fa93476be 100644
--- a/platform/darwin/src/MGLShapeSource.h
+++ b/platform/darwin/src/MGLShapeSource.h
@@ -1,12 +1,99 @@
-#import "MGLAbstractShapeSource.h"
-
 #import "MGLFoundation.h"
 #import "MGLTypes.h"
-#import "MGLShape.h"
+#import "MGLSource.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
 @protocol MGLFeature;
+@class MGLShape;
+
+/**
+ Options for `MGLShapeSource` objects.
+ */
+typedef NSString *MGLShapeSourceOption NS_STRING_ENUM;
+
+/**
+ An `NSNumber` object containing a Boolean enabling or disabling clustering.
+ If the `shape` property contains point shapes, setting this option to
+ `YES` clusters the points by radius into groups. The default value is `NO`.
+ 
+ This option corresponds to the
+ <a href="https://www.mapbox.com/mapbox-gl-style-spec/#sources-geojson-cluster"><code>cluster</code></a>
+ source property in the Mapbox Style Specification.
+ 
+ This option only affects point features within an `MGLShapeSource` object; it
+ is ignored when creating an `MGLComputedShapeSource` object.
+ */
+extern MGL_EXPORT const MGLShapeSourceOption MGLShapeSourceOptionClustered;
+
+/**
+ An `NSNumber` object containing an integer; specifies the radius of each
+ cluster if clustering is enabled. A value of 512 produces a radius equal to
+ the width of a tile. The default value is 50.
+ 
+ This option only affects point features within an `MGLShapeSource` object; it
+ is ignored when creating an `MGLComputedShapeSource` object.
+ */
+extern MGL_EXPORT const MGLShapeSourceOption MGLShapeSourceOptionClusterRadius;
+
+/**
+ An `NSNumber` object containing an integer; specifies the maximum zoom level at
+ which to cluster points if clustering is enabled. Defaults to one zoom level
+ less than the value of `MGLShapeSourceOptionMaximumZoomLevel` so that, at the
+ maximum zoom level, the shapes are not clustered.
+ 
+ This option corresponds to the
+ <a href="https://www.mapbox.com/mapbox-gl-style-spec/#sources-geojson-clusterMaxZoom"><code>clusterMaxZoom</code></a>
+ source property in the Mapbox Style Specification.
+ 
+ This option only affects point features within an `MGLShapeSource` object; it
+ is ignored when creating an `MGLComputedShapeSource` object.
+ */
+extern MGL_EXPORT const MGLShapeSourceOption MGLShapeSourceOptionMaximumZoomLevelForClustering;
+
+/**
+ An `NSNumber` object containing an integer; specifies the minimum zoom level at
+ which to create vector tiles. The default value is 0.
+
+ This option corresponds to the
+ <a href="https://www.mapbox.com/mapbox-gl-style-spec/#sources-geojson-minzoom"><code>minzoom</code></a>
+ source property in the Mapbox Style Specification.
+ */
+extern MGL_EXPORT const MGLShapeSourceOption MGLShapeSourceOptionMinimumZoomLevel;
+
+/**
+ An `NSNumber` object containing an integer; specifies the maximum zoom level at
+ which to create vector tiles. A greater value produces greater detail at high
+ zoom levels. The default value is 18.
+ 
+ This option corresponds to the
+ <a href="https://www.mapbox.com/mapbox-gl-style-spec/#sources-geojson-maxzoom"><code>maxzoom</code></a>
+ source property in the Mapbox Style Specification.
+ */
+extern MGL_EXPORT const MGLShapeSourceOption MGLShapeSourceOptionMaximumZoomLevel;
+
+/**
+ An `NSNumber` object containing an integer; specifies the size of the tile
+ buffer on each side. A value of 0 produces no buffer. A value of 512 produces a
+ buffer as wide as the tile itself. Larger values produce fewer rendering
+ artifacts near tile edges and slower performance. The default value is 128.
+ 
+ This option corresponds to the
+ <a href="https://www.mapbox.com/mapbox-gl-style-spec/#sources-geojson-buffer"><code>buffer</code></a>
+ source property in the Mapbox Style Specification.
+ */
+extern MGL_EXPORT const MGLShapeSourceOption MGLShapeSourceOptionBuffer;
+
+/**
+ An `NSNumber` object containing a double; specifies the Douglas-Peucker
+ simplification tolerance. A greater value produces simpler geometries and
+ improves performance. The default value is 0.375.
+ 
+ This option corresponds to the
+ <a href="https://www.mapbox.com/mapbox-gl-style-spec/#sources-geojson-tolerance"><code>tolerance</code></a>
+ source property in the Mapbox Style Specification.
+ */
+extern MGL_EXPORT const MGLShapeSourceOption MGLShapeSourceOptionSimplificationTolerance;
 
 /**
  `MGLShapeSource` is a map content source that supplies vector shapes to be
@@ -16,6 +103,10 @@ NS_ASSUME_NONNULL_BEGIN
  `MGLStyle` object along with an `MGLVectorStyleLayer` object. The vector style
  layer defines the appearance of any content supplied by the shape source. You
  can update a shape source by setting its `shape` or `URL` property.
+ 
+ `MGLShapeSource` is optimized for data sets that change dynamically and fit
+ completely in memory. For large data sets that do not fit completely in memory,
+ use the `MGLComputedShapeSource` or `MGLVectorTileSource` class.
 
  Each
  <a href="https://www.mapbox.com/mapbox-gl-style-spec/#sources-geojson"><code>geojson</code></a>
@@ -41,13 +132,21 @@ NS_ASSUME_NONNULL_BEGIN
  ```
  */
 MGL_EXPORT
-@interface MGLShapeSource : MGLAbstractShapeSource
+@interface MGLShapeSource : MGLSource
 
 #pragma mark Initializing a Source
 
 /**
  Returns a shape source with an identifier, URL, and dictionary of options for
  the source.
+ 
+ This class supports the following options: `MGLShapeSourceOptionClustered`,
+ `MGLShapeSourceOptionClusterRadius`,
+ `MGLShapeSourceOptionMaximumZoomLevelForClustering`,
+ `MGLShapeSourceOptionMinimumZoomLevel`, `MGLShapeSourceOptionMaximumZoomLevel`,
+ `MGLShapeSourceOptionBuffer`, and
+ `MGLShapeSourceOptionSimplificationTolerance`. Shapes provided by a shape
+ source are not clipped or wrapped automatically.
 
  @param identifier A string that uniquely identifies the source.
  @param url An HTTP(S) URL, absolute file URL, or local file URL relative to the
@@ -60,6 +159,14 @@ MGL_EXPORT
 /**
  Returns a shape source with an identifier, a shape, and dictionary of options
  for the source.
+ 
+ This class supports the following options: `MGLShapeSourceOptionClustered`,
+ `MGLShapeSourceOptionClusterRadius`,
+ `MGLShapeSourceOptionMaximumZoomLevelForClustering`,
+ `MGLShapeSourceOptionMinimumZoomLevel`, `MGLShapeSourceOptionMaximumZoomLevel`,
+ `MGLShapeSourceOptionBuffer`, and
+ `MGLShapeSourceOptionSimplificationTolerance`. Shapes provided by a shape
+ source are not clipped or wrapped automatically.
 
  To specify attributes about the shape, use an instance of an `MGLShape`
  subclass that conforms to the `MGLFeature` protocol, such as `MGLPointFeature`.
@@ -81,6 +188,14 @@ MGL_EXPORT
 /**
  Returns a shape source with an identifier, an array of features, and a dictionary
  of options for the source.
+ 
+ This class supports the following options: `MGLShapeSourceOptionClustered`,
+ `MGLShapeSourceOptionClusterRadius`,
+ `MGLShapeSourceOptionMaximumZoomLevelForClustering`,
+ `MGLShapeSourceOptionMinimumZoomLevel`, `MGLShapeSourceOptionMaximumZoomLevel`,
+ `MGLShapeSourceOptionBuffer`, and
+ `MGLShapeSourceOptionSimplificationTolerance`. Shapes provided by a shape
+ source are not clipped or wrapped automatically.
 
  Unlike `-initWithIdentifier:shapes:options:`, this method accepts `MGLFeature`
  instances, such as `MGLPointFeature` objects, whose attributes you can use when
@@ -100,6 +215,14 @@ MGL_EXPORT
 /**
  Returns a shape source with an identifier, an array of shapes, and a dictionary of
  options for the source.
+ 
+ This class supports the following options: `MGLShapeSourceOptionClustered`,
+ `MGLShapeSourceOptionClusterRadius`,
+ `MGLShapeSourceOptionMaximumZoomLevelForClustering`,
+ `MGLShapeSourceOptionMinimumZoomLevel`, `MGLShapeSourceOptionMaximumZoomLevel`,
+ `MGLShapeSourceOptionBuffer`, and
+ `MGLShapeSourceOptionSimplificationTolerance`. Shapes provided by a shape
+ source are not clipped or wrapped automatically.
 
  Any `MGLFeature` instance passed into this initializer is treated as an ordinary
  shape, causing any attributes to be inaccessible to an `MGLVectorStyleLayer` when