export interface TextMeasurementStyle {
    font: string;
    fontSize: number;
    lineHeight: number;
    whiteSpace: string;
    paddingLeft: number;
    paddingRight: number;
    paddingTop: number;
    paddingBottom: number;
    letterSpacing: number;
    textTransform: string;
}
export declare class UITextMeasurement {
    private static _preparedCache;
    private static globalStyleCache;
    private static elementToCacheKey;
    private static _canvas;
    private static _context;
    private static measurementElement;
    private static generateStyleCacheKey;
    private static getSemanticCacheKey;
    private static getCanvasContext;
    private static getMeasurementElement;
    private static applyTextTransform;
    private static parseLineHeight;
    private static isPlainText;
    private static hasSimpleFormatting;
    private static getPreparedText;
    private static calculatePlainTextSizeViaPretext;
    private static _fontsLoadingSet;
    static measureTextWidth(text: string, font: string, letterSpacing?: number): number;
    private static wrapNormal;
    private static wrapPreservingWhitespace;
    private static wrapText;
    private static calculatePlainTextSizeViaCanvas;
    private static calculatePlainTextSize;
    private static measureWithDOM;
    static getElementStyles(element: HTMLElement, providedStyles?: TextMeasurementStyle): TextMeasurementStyle;
    /**
     * Calculate intrinsic content size for text.
     *
     * Routing:
     *   plain text, no letter-spacing, pretext available  → pretext (best accuracy + speed)
     *   plain text, letter-spacing or no pretext          → hand-rolled canvas
     *   simple inline HTML (<b>/<i>/etc.)                 → same as above, tags stripped first
     *   complex HTML                                       → DOM measurement
     */
    static calculateTextSize(element: HTMLElement, content: string, constrainingWidth?: number, constrainingHeight?: number, providedStyles?: TextMeasurementStyle): {
        width: number;
        height: number;
    };
    /**
     * Clears all caches (prepared text, style, element, and canvas context).
     * Call on documentFontsDidLoad or app cleanup.
     */
    static clearCaches(): void;
    /**
     * Invalidate cached styles for a specific element.
     * Also clears the pretext prepared-text cache conservatively since the
     * font string may have changed.
     */
    static invalidateElement(element: HTMLElement): void;
    /**
     * Invalidate cache for elements with a specific CSS class.
     */
    static invalidateClass(className: string): void;
    /**
     * Pre-warm the style cache by reading styles from representative elements.
     */
    static prewarmCache(elements: HTMLElement[]): void;
    /**
     * Clean up all resources (call on app teardown).
     */
    static cleanup(): void;
}
export interface UITextViewMeasurementMethods {
    intrinsicContentSizeEfficient(constrainingWidth?: number, constrainingHeight?: number): {
        width: number;
        height: number;
    };
}