import type { EnhancedTranslationFile, FormatOptions, IFormatHandler, ValidationResult } from "../format.interface.js";
import type { TranslationFile } from "../translate.interface.js";
export declare class XtbHandler implements IFormatHandler {
    private parser;
    private builder;
    constructor();
    canHandle(filePath: string, content?: string): boolean;
    parse(content: string): EnhancedTranslationFile;
    serialize(data: EnhancedTranslationFile, options?: FormatOptions): string;
    getFileExtension(): string;
    validateStructure(data: TranslationFile): ValidationResult;
    /**
     * Update existing XTB file with new translations while preserving message references
     */
    updateXtbTranslations(existingXtbContent: string, newTranslations: TranslationFile): string;
    private preservePlaceholders;
    private validatePlaceholders;
    /**
     * Extract and validate placeholder information from translation text
     */
    private extractPlaceholderInfo;
    /**
     * Validate translation integrity by checking placeholder consistency with original message
     */
    validateTranslationIntegrity(originalText: string, translatedText: string): ValidationResult;
    private extractTranslationMetadata;
    private updateOriginalStructure;
    private reconstructXtbStructure;
    /**
     * Extract text content from mixed XML content (text + elements)
     */
    private extractMixedContent;
}