/**
 * Elementary-run computation for inline serialization.
 *
 * The doc model permits arbitrarily overlapping spans; markdown needs properly
 * nested delimiters. Step one of the serializer is to slice a text range into
 * **elementary runs** — maximal intervals over which the set of active marks
 * is constant. The emitter (docToMd) then walks the runs with a close/reopen
 * stack, which is guaranteed to produce valid nesting.
 */
import type { InlineSpan, InlineSpanType } from '@sigx/lynx-richtext';
export interface ActiveMark {
    type: InlineSpanType;
    /** Identity key — distinguishes links by href so adjacent different links don't merge. */
    key: string;
    attrs?: Record<string, string>;
}
export interface Run {
    start: number;
    end: number;
    /** Marks active over the whole run. */
    active: ActiveMark[];
}
export declare function markPriority(mark: ActiveMark): number;
/**
 * Slice `[start, end)` into elementary runs for the given spans.
 *
 * `code` is terminal: within a code span every other mark except an enclosing
 * `link` is suppressed (markdown cannot style inside code spans, but
 * `[`code`](href)` is valid).
 */
export declare function computeRuns(spans: InlineSpan[], start: number, end: number): Run[];