maplibre-compose/dev.sargunv.maplibrecompose.core.expression/ExpressionScope

ExpressionScope

Inheritors

Types

data class FormatStyle(val textFont: Expression<String>? = null, val textColor: Expression<String>? = null, val fontScale: Expression<Number>? = null)

MatchBranch

data class MatchBranch<Label, Output>

Functions

abs

open fun abs(value: Expression<Number>): Expression<Number>

accumulated

open fun <T> accumulated(key: Expression<String>): Expression<T>

acos

open fun acos(value: Expression<Number>): Expression<Number>

all

open fun all(vararg expressions: Expression<Boolean>): Expression<Boolean>

any

open fun any(vararg expressions: Expression<Boolean>): Expression<Boolean>

array

open fun <T> array(value: Expression<*>, type: Expression<String>? = null, length: Expression<Number>? = null): Expression<List<T>>

Asserts that the input is an array (optionally with a specific item type and length). If, when the input expression is evaluated, it is not of the asserted type, then this assertion will cause the whole expression to be aborted.

asin

open fun asin(value: Expression<Number>): Expression<Number>

open fun <T> at(index: Expression<Number>, array: Expression<List<T>>): Expression<T>

Retrieves an item from an array.

atan

open fun atan(value: Expression<Number>): Expression<Number>

boolean

open fun boolean(value: Expression<*>, vararg fallbacks: Expression<*>): Expression<Boolean>

Asserts that the input value is a boolean. If multiple values are provided, each one is evaluated in order until a boolean is obtained. If none of the inputs are booleans, the expression is an error.

case

open fun <T> case(vararg branches: ExpressionScope.CaseBranch<T>, fallback: Expression<T>): Expression<T>

Selects the first output whose corresponding test condition evaluates to true, or the fallback value otherwise.

ceil

open fun ceil(value: Expression<Number>): Expression<Number>

coalesce

open fun <T> coalesce(vararg values: Expression<T?>): Expression<T>

Evaluates each expression in turn until the first non-null value is obtained, and returns that value.

collator

open fun collator(caseSensitive: Expression<Boolean>? = null, diacriticSensitive: Expression<Boolean>? = null, locale: Expression<String>? = null): Expression<TCollator>

Returns a collator for use in locale-dependent comparison operations. The caseSensitive and diacriticSensitive options default to false. The locale argument specifies the IETF language tag of the locale to use. If none is provided, the default locale is used. If the requested locale is not available, the collator will use a system-defined fallback locale. Use resolvedLocale to test the results of locale fallback behavior.

concat

open fun concat(vararg strings: Expression<String>): Expression<String>

const

open fun const(color: Color): Expression<Color>

open fun const(bool: Boolean): Expression<Boolean>

open fun const(number: Number): Expression<Number>

open fun const(string: String): Expression<String>

cos

open fun cos(value: Expression<Number>): Expression<Number>

cubicBezier

open fun cubicBezier(x1: Expression<Number>, y1: Expression<Number>, x2: Expression<Number>, y2: Expression<Number>): Expression<TInterpolationType>

distance

open fun distance(value: Expression<TGeometry>): Expression<Number>

div

open operator fun Expression<Number>.div(b: Expression<Number>): Expression<Number>

downcase

open fun downcase(string: Expression<String>): Expression<String>

open fun e(): Expression<Number>

open infix fun Expression<*>.eq(other: Expression<*>): Expression<Boolean>

open fun eq(left: Expression<String>, right: Expression<String>, collator: Expression<TCollator>? = null): Expression<Boolean>

exponential

open fun exponential(base: Expression<Number>): Expression<TInterpolationType>

featureState

open fun <T> featureState(key: Expression<String>): Expression<T>

floor

open fun floor(value: Expression<Number>): Expression<Number>

format

open fun format(value: Expression<String>): Expression<TFormatted>

open fun format(vararg sections: Pair<Expression<*>, ExpressionScope.FormatStyle>): Expression<TFormatted>

Returns a formatted string for displaying mixed-format text in the text-field property. The input may contain a string literal or expression, including an 'image' expression. Strings may be followed by a style override object that supports the following properties:

geometryType

open fun geometryType(): Expression<String>

get

@JvmName(name = "getAtIndex")

open operator fun <T> Expression<List<T>>.get(index: Expression<Number>): Expression<T>

open fun <T> get(key: Expression<String>, obj: Expression<Map<String, *>>? = null): Expression<T>

Retrieves a property value from the current feature's properties, or from another object if a second argument is provided. Returns null if the requested property is missing.

@JvmName(name = "gtNumber")

open infix fun Expression<Number>.gt(other: Expression<Number>): Expression<Boolean>

@JvmName(name = "gtString")

open infix fun Expression<String>.gt(other: Expression<String>): Expression<Boolean>

open fun gt(left: Expression<String>, right: Expression<String>, collator: Expression<TCollator>? = null): Expression<Boolean>

gte

@JvmName(name = "gteNumber")

open infix fun Expression<Number>.gte(other: Expression<Number>): Expression<Boolean>

@JvmName(name = "gteString")

open infix fun Expression<String>.gte(other: Expression<String>): Expression<Boolean>

open fun gte(left: Expression<String>, right: Expression<String>, collator: Expression<TCollator>? = null): Expression<Boolean>

has

open fun has(key: Expression<String>, obj: Expression<Map<String, *>>? = null): Expression<Boolean>

Tests for the presence of an property value in the current feature's properties, or from another object if a second argument is provided.

heatmapDensity

open fun heatmapDensity(): Expression<Number>

open fun <T> id(): Expression<T>

image

open fun image(value: Expression<String>): Expression<TResolvedImage>

Returns an image type for use in icon-image, *-pattern entries and as a section in the unformatted expression. If set, the image argument will check that the requested image exists in the style and will return either the resolved image name or null, depending on whether or not the image is currently in the style. This validation process is synchronous and requires the image to have been added to the style before requesting it in the image argument.

@JvmName(name = "inListInfix")

open infix fun Expression<*>.in(other: Expression<List<*>>): Expression<Boolean>

@JvmName(name = "inStringInfix")

open infix fun Expression<String>.in(other: Expression<String>): Expression<Boolean>

@JvmName(name = "inList")

open fun in(needle: Expression<*>, haystack: Expression<List<*>>): Expression<Boolean>

Determines whether an item exists in an array.

@JvmName(name = "inString")

open fun in(needle: Expression<String>, haystack: Expression<String>): Expression<Boolean>

Determines whether a substring exists in a string.

indexOf

open fun indexOf(value: Expression<*>, array: Expression<List<*>>, start: Expression<Number>? = null): Expression<Number>

Returns the first position at which an item can be found in an array or a substring can be found in a string, or -1 if the input cannot be found. Accepts an optional index from where to begin the search. In a string, a UTF-16 surrogate pair counts as a single position.

insets

open fun insets(insets: Insets): Expression<Insets>

open fun insets(top: Number, right: Number, bottom: Number, left: Number): Expression<Insets>

interpolate

@JvmName(name = "interpolateColor")

open fun interpolate(type: Expression<TInterpolationType>, input: Expression<Number>, vararg stops: Pair<Number, Expression<Color>>): Expression<Color>

@JvmName(name = "interpolatePoint")

open fun interpolate(type: Expression<TInterpolationType>, input: Expression<Number>, vararg stops: Pair<Number, Expression<Point>>): Expression<Point>

@JvmName(name = "interpolateNumber")

open fun interpolate(type: Expression<TInterpolationType>, input: Expression<Number>, vararg stops: Pair<Number, Expression<Number>>): Expression<Number>

@JvmName(name = "interpolateNumbers")

open fun interpolate(type: Expression<TInterpolationType>, input: Expression<Number>, vararg stops: Pair<Number, Expression<List<Number>>>): Expression<List<Number>>

interpolateHcl

open fun interpolateHcl(type: Expression<TInterpolationType>, input: Expression<Number>, vararg stops: Pair<Number, Expression<Color>>): Expression<Color>

interpolateLab

open fun interpolateLab(type: Expression<TInterpolationType>, input: Expression<Number>, vararg stops: Pair<Number, Expression<Color>>): Expression<Color>

isSupportedScript

open fun isSupportedScript(script: Expression<String>): Expression<Boolean>

length

@JvmName(name = "lengthOfString")

open fun length(value: Expression<String>): Expression<Number>

@JvmName(name = "lengthOfList")

open fun length(value: Expression<List<*>>): Expression<Number>

Gets the length of an array or string. In a string, a UTF-16 surrogate pair counts as a single position.

let

open fun <T> let(name: String, value: Expression<*>, expression: Expression<T>): Expression<T>

Binds expressions to named variables, which can then be referenced in the result expression using var.

linear

open fun linear(): Expression<TInterpolationType>

lineProgress

open fun lineProgress(value: Expression<Number>): Expression<Number>

literal

open fun <T> literal(values: List<Expression<T>>): Expression<List<T>>

Produces a literal array value.

open fun <T> literal(values: Map<String, Expression<T>>): Expression<Map<String, T>>

Produces a literal object value.

open fun ln(value: Expression<Number>): Expression<Number>

ln2

open fun ln2(): Expression<Number>

log10

open fun log10(value: Expression<Number>): Expression<Number>

log2

open fun log2(value: Expression<Number>): Expression<Number>

@JvmName(name = "ltNumber")

open infix fun Expression<Number>.lt(other: Expression<Number>): Expression<Boolean>

@JvmName(name = "ltString")

open infix fun Expression<String>.lt(other: Expression<String>): Expression<Boolean>

open fun lt(left: Expression<String>, right: Expression<String>, collator: Expression<TCollator>? = null): Expression<Boolean>

lte

@JvmName(name = "lteNumber")

open infix fun Expression<Number>.lte(other: Expression<Number>): Expression<Boolean>

@JvmName(name = "lteString")

open infix fun Expression<String>.lte(other: Expression<String>): Expression<Boolean>

open fun lte(left: Expression<String>, right: Expression<String>, collator: Expression<TCollator>? = null): Expression<Boolean>

match

@JvmName(name = "matchNumbers")

open fun <T> match(input: Expression<Number>, fallback: Expression<T>, vararg branches: ExpressionScope.MatchBranch<Number, T>): Expression<T>

@JvmName(name = "matchStrings")

open fun <T> match(input: Expression<String>, fallback: Expression<T>, vararg branches: ExpressionScope.MatchBranch<String, T>): Expression<T>

Selects the output whose label value matches the input value, or the fallback value if no match is found. The input can be any expression (e.g. "get", "building_type"). Each label must be either:

max

open fun max(vararg numbers: Expression<Number>): Expression<Number>

min

open fun min(vararg numbers: Expression<Number>): Expression<Number>

minus

open operator fun Expression<Number>.minus(other: Expression<Number>): Expression<Number>

neq

open infix fun Expression<*>.neq(other: Expression<*>): Expression<Boolean>

open fun neq(left: Expression<String>, right: Expression<String>, collator: Expression<TCollator>? = null): Expression<Boolean>

nil

open fun <T> nil(): Expression<T>

not

@JvmName(name = "notOperator")

open operator fun Expression<Boolean>.not(): Expression<Boolean>

open fun not(expression: Expression<Boolean>): Expression<Boolean>

number

open fun number(value: Expression<*>, vararg fallbacks: Expression<*>): Expression<Number>

Asserts that the input value is a number. If multiple values are provided, each one is evaluated in order until a number is obtained. If none of the inputs are numbers, the expression is an error.

numberFormat

open fun numberFormat(number: Expression<Number>, locale: Expression<String>? = null, currency: Expression<String>? = null, minFractionDigits: Expression<Number>? = null, maxFractionDigits: Expression<Number>? = null): Expression<String>

Converts the input number into a string representation using the providing formatting rules. If set, the locale argument specifies the locale to use, as a BCP 47 language tag. If set, the currency argument specifies an ISO 4217 code to use for currency-style formatting. If set, the min-fraction-digits and max-fraction-digits arguments specify the minimum and maximum number of fractional digits to include.

object

open fun <T> object(value: Expression<*>, vararg fallbacks: Expression<*>): Expression<Map<String, T>>

Asserts that the input value is an object. If multiple values are provided, each one is evaluated in order until an object is obtained. If none of the inputs are objects, the expression is an error.

open fun pi(): Expression<Number>

plus

open operator fun Expression<Number>.plus(other: Expression<Number>): Expression<Number>

point

open fun point(point: Point): Expression<Point>

open fun point(x: Number, y: Number): Expression<Point>

pow

open fun Expression<Number>.pow(exponent: Expression<Number>): Expression<Number>

product

open fun product(vararg numbers: Expression<Number>): Expression<Number>

properties

open fun <T> properties(): Expression<Map<String, T>>

rem

open operator fun Expression<Number>.rem(b: Expression<Number>): Expression<Number>

resolvedLocale

open fun resolvedLocale(collator: Expression<TCollator>): Expression<String>

rgb

open fun rgb(red: Expression<Number>, green: Expression<Number>, blue: Expression<Number>): Expression<Color>

rgba

open fun rgba(red: Expression<Number>, green: Expression<Number>, blue: Expression<Number>, alpha: Expression<Number>): Expression<Color>

round

open fun round(value: Expression<Number>): Expression<Number>

sin

open fun sin(value: Expression<Number>): Expression<Number>

slice

@JvmName(name = "sliceString")

open fun slice(value: Expression<String>, start: Expression<Number>, length: Expression<Number>? = null): Expression<String>

Returns a substring from a string from a specified start index, or between a start index and an end index if set. The return value is inclusive of the start index but not of the end index. A UTF-16 surrogate pair counts as a single position.

@JvmName(name = "sliceList")

open fun <T> slice(value: Expression<List<T>>, start: Expression<Number>, length: Expression<Number>? = null): Expression<T>

Returns an item from an list from a specified start index, or between a start index and an end index if set. The return value is inclusive of the start index but not of the end index.

sqrt

open fun sqrt(value: Expression<Number>): Expression<Number>

step

open fun <Output> step(input: Expression<Number>, fallback: Expression<Output>, vararg stops: Pair<Number, Expression<Output>>): Expression<Output>

string

open fun string(value: Expression<*>, vararg fallbacks: Expression<*>): Expression<String>

Asserts that the input value is a string. If multiple values are provided, each one is evaluated in order until a string is obtained. If none of the inputs are strings, the expression is an error.

sum

open fun sum(vararg numbers: Expression<Number>): Expression<Number>

tan

open fun tan(value: Expression<Number>): Expression<Number>

then

open infix fun <Output> Expression<Boolean>.then(output: Expression<Output>): ExpressionScope.CaseBranch<Output>

open infix fun <Output> Number.then(output: Expression<Output>): ExpressionScope.MatchBranch<Number, Output>

open infix fun <Output> String.then(output: Expression<Output>): ExpressionScope.MatchBranch<String, Output>

@JvmName(name = "numbersThen")

open infix fun <Output> List<Number>.then(output: Expression<Output>): ExpressionScope.MatchBranch<Number, Output>

@JvmName(name = "stringsThen")

open infix fun <Output> List<String>.then(output: Expression<Output>): ExpressionScope.MatchBranch<String, Output>

times

open operator fun Expression<Number>.times(other: Expression<Number>): Expression<Number>

toBoolean

open fun toBoolean(value: Expression<*>): Expression<Boolean>

Converts the input value to a boolean. The result is false when then input is an empty string, 0, false, null, or NaN; otherwise it is true.

toColor

open fun toColor(value: Expression<*>, vararg fallbacks: Expression<*>): Expression<Color>

Converts the input value to a color. If multiple values are provided, each one is evaluated in order until the first successful conversion is obtained. If none of the inputs can be converted, the expression is an error.

toNumber

open fun toNumber(value: Expression<*>, vararg fallbacks: Expression<*>): Expression<Number>

Converts the input value to a number, if possible. If the input is null or false, the result is 0. If the input is true, the result is 1. If the input is a string, it is converted to a number as specified by the "ToNumber Applied to the String Type" algorithm of the ECMAScript Language Specification. If multiple values are provided, each one is evaluated in order until the first successful conversion is obtained. If none of the inputs can be converted, the expression is an error.

toRgba

open fun toRgba(color: Expression<Color>): Expression<List<Number>>

toString

open fun toString(value: Expression<*>): Expression<String>

Converts the input value to a string. If the input is null, the result is "". If the input is a boolean, the result is "true" or "false". If the input is a number, it is converted to a string as specified by the "NumberToString" algorithm of the ECMAScript Language Specification. If the input is a color, it is converted to a string of the form "rgba(r,g,b,a)", where r, g, and b are numerals ranging from 0 to 255, and a ranges from 0 to 1. Otherwise, the input is converted to a string in the format specified by the JSON.stringify function of the ECMAScript Language Specification.

typeof

open fun typeof(expression: Expression<*>): Expression<String>

Returns a string describing the type of the given value.

unaryMinus

open operator fun Expression<Number>.unaryMinus(): Expression<Number>

upcase

open fun upcase(string: Expression<String>): Expression<String>

var

open fun <T> var(name: String): Expression<T>

References variable bound using let.

within

open fun within(geometry: Expression<TGeometry>): Expression<Boolean>

zoom

open fun zoom(): Expression<Number>