/**
 * Attribute Extractor
 *
 * Finds translatable HTML attribute values in the DOM and parses each
 * into an AttributeUnit. Pairs with BlockExtractor (text-content side)
 * to cover everything user-visible:
 *
 *   - <img alt>, <area alt>, <input type="image" alt>
 *   - any element [title]
 *   - <input placeholder>, <textarea placeholder>
 *   - <meta name="description" content="...">
 *   - <input type="submit|button|reset" value>
 *
 * Cross-stack parity: produces the same auto_ key as BlockExtractor for
 * the same trimmed text — md5(text.trim()) prefix — so a button labelled
 * "Submit" and a paragraph "Submit" collide on key (intentional reuse).
 *
 * `<input type="text" value="...">` is deliberately excluded because
 * `value` on a plain text input is user data, not UI copy, and would
 * corrupt form state if treated as translatable.
 */
import type { AttributeUnit } from '../content/types.js';
import { type ExcludePatterns } from './exclude-filter.js';
export interface ExtractedAttribute {
    /** Live element carrying the attribute */
    element: Element;
    /** HTML attribute name (e.g. `alt`, `content`) */
    attrName: string;
    /** Translatable payload */
    unit: AttributeUnit;
    /** auto_ key or server-stamped key */
    key: string;
}
export declare class AttributeExtractor {
    private excludeFilter;
    private excludeSelectors;
    constructor(excludePatterns?: Partial<ExcludePatterns>, excludeSelectors?: string[], minTextLength?: number);
    /**
     * Walk the DOM under `root` and return every translatable attribute.
     *
     * @param root           Element or Document to scan
     * @param includeStamped When true, elements already carrying
     *                       `data-lr-attr-{name}` are returned anyway —
     *                       the editor uses this to surface server-handled
     *                       attributes for inspection. The runtime keeps
     *                       the default `false` so it doesn't re-extract
     *                       what the server already keyed.
     */
    extract(root: Element | Document, includeStamped?: boolean): ExtractedAttribute[];
    private isInsideSkipTag;
    private hasSkipAncestor;
    private matchesExcludeSelector;
}
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