import { AssetNamingStrategy } from './asset-naming-strategy';
/**
 * @description
 * 默认策略对文件名进行规范化，以删除不需要的字符和在冲突的情况下，增加一个计数器后缀.
 *
 * @docsCategory assets
 */
export declare class DefaultAssetNamingStrategy implements AssetNamingStrategy {
    private readonly numberingRe;
    generateSourceFileName(originalFileName: string, conflictFileName?: string): string;
    generatePreviewFileName(sourceFileName: string, conflictFileName?: string): string;
    /**
     * "supported format" 意味着 Sharp 库可以转换它并输出相同的内容文件类型。不支持的图像和其他非图像文件将转换为 PNG。
     *
     * See http://sharp.pixelplumbing.com/en/stable/api-output/#tobuffer
     */
    private isSupportedImageFormat;
    private incrementOrdinalSuffix;
    private addOrdinalSuffix;
    private addSuffix;
}