import { PdfViewerBase } from '../base';
import { PdfAnnotationBaseModel } from '../drawing/pdf-annotation-model';
/**
 * Redaction Overlay Text Module
 *
 * This module provides functionality to display overlay text on redaction annotations
 * when hovering over them, similar to how hover color changes work.
 *
 * @hidden
 */
export declare class RedactionOverlayText {
    private pdfViewer;
    private pdfViewerBase;
    /**
     * Constructor for RedactionOverlayText
     * @param {any} pdfViewer - The PDF viewer instance
     * @param {any} pdfViewerBase - The viewer base instance
     */
    constructor(pdfViewer: any, pdfViewerBase: PdfViewerBase);
    /**
     * Renders overlay text on a redaction annotation
     * @param {PdfAnnotationBaseModel} annotation - The redaction annotation
     * @param {any} currentAnnot - current annotation
     * @private
     * @returns {void}
     */
    renderRedactionOverlayText(annotation: PdfAnnotationBaseModel, currentAnnot?: any): void;
    private setAttributeHtml;
    private applyStyleAgainstCsp;
    /**
     * Removes overlay text from a redaction annotation
     * @param {any} annotation - The redaction annotation
     * @private
     * @returns {void} - void
     */
    removeRedactionOverlayText(annotation: any): void;
    /**
     * Gets the CSS align style based on text alignment
     * @param {string} textAlign - The text alignment (left, right, center)
     * @returns {string} The CSS align style
     */
    private getAlignStyle;
    /**
     * Applies vertical text layout for narrow redaction annotations
     * @param {HTMLElement} container - The container element
     * @param {string} text - The text to display
     * @param {string} textAlign - The text alignment
     * @returns {void}
     */
    private applyVerticalTextLayout;
    /**
     * Renders repeated text in a redaction annotation
     * @param {HTMLElement} container - The container element
     * @param {string} text - The text to repeat
     * @param {number} fontSize - The font size
     * @param {string} textAlign - The text alignment
     * @returns {void} - void
     */
    private renderRepeatedTextHtml;
    /**
     * Updates the redaction annotation after editing (resize/drag)
     * @param {PdfAnnotationBaseModel} annotation - The redaction annotation
     * @private
     * @returns {void} -void
     */
    updateRedactionAfterEdit(annotation: PdfAnnotationBaseModel): void;
}