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#import <Foundation/Foundation.h>
#if TARGET_OS_IPHONE
#import <UIKit/UIKit.h>
#else
#import <Cocoa/Cocoa.h>
#endif
#import "MGLTypes.h"
NS_ASSUME_NONNULL_BEGIN
typedef NSString *MGLExpressionInterpolationMode NS_TYPED_ENUM;
/**
An `NSString` identifying the `linear` interpolation type in an `NSExpression`.
This attribute corresponds to the `linear` value in the
<a href="https://www.mapbox.com/mapbox-gl-js/style-spec/#expressions-interpolate"><code>interpolate</code></a>
expression operator in the Mapbox Style Specification.
*/
FOUNDATION_EXTERN MGL_EXPORT const MGLExpressionInterpolationMode MGLExpressionInterpolationModeLinear;
/**
An `NSString` identifying the `expotential` interpolation type in an `NSExpression`.
This attribute corresponds to the `exponential` value in the
<a href="https://www.mapbox.com/mapbox-gl-js/style-spec/#expressions-interpolate"><code>interpolate</code></a>
expression operator in the Mapbox Style Specification.
*/
FOUNDATION_EXTERN MGL_EXPORT const MGLExpressionInterpolationMode MGLExpressionInterpolationModeExponential;
/**
An `NSString` identifying the `cubic-bezier` interpolation type in an `NSExpression`.
This attribute corresponds to the `cubic-bezier` value in the
<a href="https://www.mapbox.com/mapbox-gl-js/style-spec/#expressions-interpolate"><code>interpolate</code></a>
expression operator in the Mapbox Style Specification.
*/
FOUNDATION_EXTERN MGL_EXPORT const MGLExpressionInterpolationMode MGLExpressionInterpolationModeCubicBezier;
/**
Methods for creating expressions that use Mapbox-specific functionality and for
converting to and from the JSON format defined in the
<a href="https://www.mapbox.com/mapbox-gl-js/style-spec/#expressions">Mapbox Style Specification</a>.
*/
@interface NSExpression (MGLAdditions)
#pragma mark Creating Variable Expressions
/**
`NSExpression` variable that corresponds to the
<a href="https://www.mapbox.com/mapbox-gl-js/style-spec/#expressions-zoom"><code>zoom</code></a>
expression operator in the Mapbox Style Specification.
*/
@property (class, nonatomic, readonly) NSExpression *zoomLevelVariableExpression;
/**
`NSExpression` variable that corresponds to the
<a href="https://www.mapbox.com/mapbox-gl-js/style-spec/#expressions-heatmap-density"><code>heatmap-density</code></a>
expression operator in the Mapbox Style Specification.
*/
@property (class, nonatomic, readonly) NSExpression *heatmapDensityVariableExpression;
/**
`NSExpression` variable that corresponds to the
<a href="https://www.mapbox.com/mapbox-gl-js/style-spec/#expressions-line-progress"><code>line-progress</code></a>
expression operator in the Mapbox Style Specification.
*/
@property (class, nonatomic, readonly) NSExpression *lineProgressVariableExpression;
/**
`NSExpression` variable that corresponds to the
<a href="https://www.mapbox.com/mapbox-gl-js/style-spec/#eexpressions-geometry-type"><code>geometry-type</code></a>
expression operator in the Mapbox Style Specification.
*/
@property (class, nonatomic, readonly) NSExpression *geometryTypeVariableExpression;
/**
`NSExpression` variable that corresponds to the
<a href="https://www.mapbox.com/mapbox-gl-js/style-spec/#expressions-id"><code>id</code></a>
expression operator in the Mapbox Style Specification.
*/
@property (class, nonatomic, readonly) NSExpression *featureIdentifierVariableExpression;
/**
`NSExpression` variable that corresponds to the
<a href="https://www.mapbox.com/mapbox-gl-js/style-spec/#expressions-properties"><code>properties</code></a>
expression operator in the Mapbox Style Specification.
*/
@property (class, nonatomic, readonly) NSExpression *featureAttributesVariableExpression;
@property (class, nonatomic, readonly) NSExpression *featurePropertiesVariableExpression __attribute__((deprecated("Use -featureAttributesVariableExpression.")));
#pragma mark Creating Conditional Expressions
/**
Returns a conditional function expression specifying the string predicate, and
expressions for each condition.
@param conditionPredicate The predicate to get evaluated.
@param trueExpression The expression for conditions equal to true.
@param falseExpression The expression for conditions equal to false.
*/
+ (instancetype)mgl_expressionForConditional:(nonnull NSPredicate *)conditionPredicate trueExpression:(nonnull NSExpression *)trueExpression falseExpresssion:(nonnull NSExpression *)falseExpression NS_SWIFT_NAME(init(forMGLConditional:trueExpression:falseExpression:));
#pragma mark Creating Ramp, Scale, and Curve Expressions
/**
Returns a step function expression specifying the stepping, from expression
and stops.
@param steppingExpression The stepping expression.
@param minimumExpression The expression which could be a constant or function expression.
@param stops The stops must be an `NSDictionary` constant `NSExpression`.
*/
+ (instancetype)mgl_expressionForSteppingExpression:(nonnull NSExpression*)steppingExpression fromExpression:(nonnull NSExpression *)minimumExpression stops:(nonnull NSExpression*)stops NS_SWIFT_NAME(init(forMGLStepping:from:stops:));
/**
Returns an interpolated function expression specifying the function operator, curve type,
parameters and steps.
@param inputExpression The interpolating expression input.
@param curveType The curve type could be `MGLExpressionInterpolationModeLinear`,
`MGLExpressionInterpolationModeExponential` and
`MGLExpressionInterpolationModeCubicBezier`.
@param parameters The parameters expression.
@param stops The stops expression.
*/
+ (instancetype)mgl_expressionForInterpolatingExpression:(nonnull NSExpression*)inputExpression withCurveType:(nonnull MGLExpressionInterpolationMode)curveType parameters:(nullable NSExpression *)parameters stops:(nonnull NSExpression*)stops NS_SWIFT_NAME(init(forMGLInterpolating:curveType:parameters:stops:));
/**
Returns a match function expression specifying the input, matching values,
and default value.
@param inputExpression The matching expression.
@param matchedExpressions The matched values expression dictionary must be condition : value.
@param defaultExpression The defaultValue expression to be used in case there is no match.
*/
+ (instancetype)mgl_expressionForMatchingExpression:(nonnull NSExpression *)inputExpression inDictionary:(nonnull NSDictionary<NSExpression *, NSExpression *> *)matchedExpressions defaultExpression:(nonnull NSExpression *)defaultExpression NS_SWIFT_NAME(init(forMGLMatchingKey:in:default:));
#pragma mark Concatenating String Expressions
/**
Returns a constant expression appending the passed expression.
@note Both the receiver and the given expression must be an `NSString` constant
expression type; otherwise, an exception is rised.
@param expression The expression to append to the receiver.
*/
- (instancetype)mgl_expressionByAppendingExpression:(nonnull NSExpression *)expression NS_SWIFT_NAME(mgl_appending(_:));
#pragma mark Converting JSON Expressions
/**
Returns an expression equivalent to the given Foundation object deserialized
from JSON data.
The Foundation object is interpreted according to the
[Mapbox Style Specification](https://www.mapbox.com/mapbox-gl-js/style-spec/#expressions).
See the
“[Information for Style Authors](../for-style-authors.html#setting-attribute-values)”
guide for a correspondence of operators and types between the style
specification and the `NSExpression` representation used by this SDK.
@param object A Foundation object deserialized from JSON data, for example
using `NSJSONSerialization`.
@return An initialized expression equivalent to `object`, suitable for use as
the value of a style layer attribute.
*/
+ (instancetype)expressionWithMGLJSONObject:(id)object NS_SWIFT_NAME(init(mglJSONObject:));
/**
An equivalent Foundation object that can be serialized as JSON.
The Foundation object conforms to the
[Mapbox Style Specification](https://www.mapbox.com/mapbox-gl-js/style-spec/#expressions).
See the
“[Information for Style Authors](../for-style-authors.html#setting-attribute-values)”
guide for a correspondence of operators and types between the style
specification and the `NSExpression` representation used by this SDK.
You can use `NSJSONSerialization` to serialize the Foundation object as data to
write to a file.
*/
@property (nonatomic, readonly) id mgl_jsonExpressionObject;
#pragma mark Localizing the Expression
/**
Returns a copy of the receiver localized into the given locale.
This method assumes the receiver refers to the feature attributes that are
available in vector tiles supplied by the
<a href="https://www.mapbox.com/vector-tiles/mapbox-streets-v7/#overview">Mapbox Streets source</a>.
On iOS, the user can set the system’s preferred language in Settings, General
Settings, Language & Region. On macOS, the user can set the system’s preferred
language in the Language & Region pane of System Preferences.
@param locale The locale into which labels should be localized. To use the
system’s preferred language, if supported, specify `nil`. To use the local
language, specify a locale with the identifier `mul`.
*/
- (NSExpression *)mgl_expressionLocalizedIntoLocale:(nullable NSLocale *)locale;
@end
NS_ASSUME_NONNULL_END
|
