import { Mark } from '@tiptap/core';
/**
 * Interface defining the attributes for the FontSize mark.
 */
interface FontSizeAttributes {
    /** The font size value as a string (e.g. "14", "14px", "1.5rem") or CSS variable. */
    size: string | null;
}
/**
 * Custom TipTap mark that applies an inline font-size to selected text.
 *
 * This mark wraps text in `<span style="font-size: value">` and parses it back.
 * Supports plain numbers (converted to px), numbers with CSS units, and CSS variables.
 * Validates all font size values to prevent CSS injection attacks.
 *
 * @example
 * // Plain number (will be converted to px)
 * editor.chain().focus().setMark('fontSize', { size: '14' }).run();
 * // With px unit
 * editor.chain().focus().setMark('fontSize', { size: '14px' }).run();
 * // With rem unit
 * editor.chain().focus().setMark('fontSize', { size: '1.5rem' }).run();
 * // CSS variable
 * editor.chain().focus().setMark('fontSize', { size: 'var(--typography-base-sizes-small-font-size)' }).run();
 * // Remove font size
 * editor.chain().focus().removeMark('fontSize').run();
 */
declare const FontSize: Mark<Record<string, unknown>, FontSizeAttributes>;
export default FontSize;