import * as csstree from "css-tree";
import { type UnitValue, type VarValue } from "@webstudio-is/css-engine";
import type { GradientColorValue, GradientStop } from "./types";
export declare const angleUnitIdentifiers: readonly ["deg", "grad", "rad", "turn"];
export declare const isAngleUnit: (unit: string) => boolean;
export declare const isAngleDimension: (node: csstree.CssNode) => node is csstree.Dimension;
export declare const isAngleLikeFallback: (fallback: VarValue["fallback"]) => boolean;
export declare const isVarAngle: (value: VarValue) => boolean;
export declare const mapLengthPercentageOrVar: (node?: csstree.CssNode) => UnitValue | VarValue | undefined;
export declare const getColor: (node: csstree.CssNode) => GradientColorValue | undefined;
export declare const isColorStop: (node: csstree.CssNode) => boolean;
export declare const withoutWhitespaceNodes: (nodes: csstree.CssNode[]) => csstree.CssNode[];
export declare const parseGradientStopFromParts: (nodes: csstree.CssNode[]) => GradientStop | undefined;
export declare const parseGradientHintFromParts: (nodes: csstree.CssNode[]) => GradientStop["hint"] | undefined;
export declare const formatGradientStops: (stops: GradientStop[]) => string;
export declare const normalizeRepeatingGradient: (gradient: string, repeatingName: string, baseName: string) => {
    normalized: string;
    isRepeating: boolean;
};
export declare const forEachGradientParts: (ast: csstree.CssNode, functionName: string, callback: (parts: csstree.CssNode[]) => void) => void;