import { FieldName } from '../channeldef';
import { CompositeEncoding, FacetedCompositeEncoding } from '../compositemark';
import { Encoding } from '../encoding';
import { ExprRef } from '../expr';
import { AnyMark, Mark, MarkDef } from '../mark';
import { Projection } from '../projection';
import { SelectionParameter } from '../selection';
import { Field } from './../channeldef';
import { BaseSpec, DataMixins, FrameMixins, GenericCompositionLayout, ResolveMixins } from './base';
import { TopLevel, TopLevelParameter } from './toplevel';
/**
 * Base interface for a unit (single-view) specification.
 */
export interface GenericUnitSpec<E extends Encoding<any>, M, P = SelectionParameter> extends BaseSpec {
    /**
     * A string describing the mark type (one of `"bar"`, `"circle"`, `"square"`, `"tick"`, `"line"`,
     * `"area"`, `"point"`, `"rule"`, `"geoshape"`, and `"text"`) or a [mark definition object](https://vega.github.io/vega-lite/docs/mark.html#mark-def).
     */
    mark: M;
    /**
     * A key-value mapping between encoding channels and definition of fields.
     */
    encoding?: E;
    /**
     * An object defining properties of geographic projection, which will be applied to `shape` path for `"geoshape"` marks
     * and to `latitude` and `"longitude"` channels for other marks.
     */
    projection?: Projection<ExprRef>;
    /**
     * An array of parameters that may either be simple variables, or more complex selections that map user input to data queries.
     */
    params?: P[];
}
/**
 * A unit specification without any shortcut/expansion syntax.
 */
export type NormalizedUnitSpec = GenericUnitSpec<Encoding<FieldName>, Mark | MarkDef>;
/**
 * A unit specification, which can contain either [primitive marks or composite marks](https://vega.github.io/vega-lite/docs/mark.html#types).
 */
export type UnitSpec<F extends Field> = GenericUnitSpec<CompositeEncoding<F>, AnyMark>;
export type UnitSpecWithFrame<F extends Field> = GenericUnitSpec<CompositeEncoding<F>, AnyMark> & FrameMixins;
/**
 * Unit spec that can have a composite mark and row or column channels (shorthand for a facet spec).
 */
export type FacetedUnitSpec<F extends Field, P = SelectionParameter> = GenericUnitSpec<FacetedCompositeEncoding<F>, AnyMark, P> & ResolveMixins & GenericCompositionLayout & FrameMixins;
export type TopLevelUnitSpec<F extends Field> = TopLevel<FacetedUnitSpec<F, TopLevelParameter>> & DataMixins;
export declare function isUnitSpec(spec: BaseSpec): spec is FacetedUnitSpec<any> | NormalizedUnitSpec;
//# sourceMappingURL=unit.d.ts.map