@uifabric/merge-styles/lib/IStyleSet.d.ts

import { IStyle } from './IStyle';
import { IStyleFunctionOrObject, IStyleFunction } from './IStyleFunction';
export declare type Diff<T extends keyof any, U extends keyof any> = ({
    [P in T]: P;
} & {
    [P in U]: never;
} & {
    [x: string]: never;
})[T];
/**
 * {@docCategory Omit}
 */
export declare type Omit<U, K extends keyof U> = Pick<U, Diff<keyof U, K>>;
/**
 * Helper function whose role is supposed to express that regardless if T is a style object or style function,
 * it will always map to a style function.
 */
export declare type __MapToFunctionType<T> = Extract<T, Function> extends never ? (...args: any[]) => Partial<T> : Extract<T, Function>;
/**
 * A style set is a dictionary of display areas to IStyle objects.
 * It may optionally contain style functions for sub components in the special `subComponentStyles`
 * property.
 */
export declare type IStyleSet<TStyleSet extends IStyleSet<TStyleSet> = {
    [key: string]: any;
}> = {
    [P in keyof Omit<TStyleSet, 'subComponentStyles'>]: IStyle;
} & {
    subComponentStyles?: {
        [P in keyof TStyleSet['subComponentStyles']]: IStyleFunctionOrObject<any, any>;
    };
};
/**
 * A concatenated style set differs from `IStyleSet` in that subComponentStyles will always be a style function.
 */
export declare type IConcatenatedStyleSet<TStyleSet extends IStyleSet<TStyleSet>> = {
    [P in keyof Omit<TStyleSet, 'subComponentStyles'>]: IStyle;
} & {
    subComponentStyles?: {
        [P in keyof TStyleSet['subComponentStyles']]: IStyleFunction<any, any>;
    };
};
/**
 * A processed style set is one which the set of styles associated with each area has been converted
 * into a class name. Additionally, all subComponentStyles are style functions.
 */
export declare type IProcessedStyleSet<TStyleSet extends IStyleSet<TStyleSet>> = {
    [P in keyof Omit<TStyleSet, 'subComponentStyles'>]: string;
} & {
    subComponentStyles: {
        [P in keyof TStyleSet['subComponentStyles']]: __MapToFunctionType<TStyleSet['subComponentStyles'] extends infer J ? (P extends keyof J ? J[P] : never) : never>;
    };
};