import { CalculationValue, StringOptions } from 'sass-embedded';
import type { StyleExtractorBuilderSchema } from '../schema';
import type { CssMetadata, CssVariable } from '@o3r/styling';
/**
 * This method will iterate on all characters in str and return the substring that is balanced which corresponds to a var declaration.
 * @param str
 */
export declare const getVarDeclaration: (str: string) => string | null;
/**
 * CSS Variable extractor
 */
export declare class CssVariableExtractor {
    defaultSassOptions?: StringOptions<"async"> | undefined;
    private readonly builderOptions?;
    private static readonly asyncCompiler;
    private static readonly varRegex;
    private readonly cache;
    constructor(defaultSassOptions?: StringOptions<"async"> | undefined, builderOptions?: Pick<StyleExtractorBuilderSchema, "ignoreInvalidValue"> | undefined);
    /**
     * Parse the CSS variable as reported
     * @param name CSS Variable name
     * @param value CSS Variable default value
     */
    private parseCssVariable;
    /**
     * Type predicate for SassCalculation
     * @param value
     */
    private static isSassCalculation;
    /**
     * Get CSS String for given color
     * @param color Sass Color
     */
    private static getColorString;
    /**
     * Returns the package name from an url
     * @param url
     */
    private static getPackageName;
    private static extractTags;
    static getCalcString(item: CalculationValue, isSubCalc: boolean): string;
    /**
     * Extract metadata from Sass Content
     * @param sassFilePath SCSS file URL
     * @param sassFileContent SCSS file content
     * @param additionalSassOptions
     */
    extractFileContent(sassFilePath: string, sassFileContent: string, additionalSassOptions?: StringOptions<'async'>): Promise<CssVariable[]>;
    /**
     * Dispose the async compiler. Must be called once when extraction is done.
     */
    disposeAsyncCompiler(): Promise<void>;
    /**
     * Extract metadata from Sass file
     * @param sassFilePath SCSS file to parse
     */
    extractFile(sassFilePath: string): Promise<CssVariable[]>;
    /**
     * Extract metadata
     * @param libraries List of libraries
     * @param current Metadata extracted for the current project
     */
    extract(libraries: string[], current: CssMetadata): CssMetadata;
}
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