/**
 * Runs of inline text for the exercise expansion (#1225): a block's plain
 * text, its spans and its source map kept together, so a piece cut from a
 * block (an option, the right side of a pair) or a word the engine adds (a
 * label, a number) stays mapped to the source the Sandbox points at.
 */
import type { ContentBlock, InlineSpan } from '../parse/index.js';
/** A block's inline content: `text` is the spans joined, `sourceMap` one
 *  offset per character of it. */
export interface Run {
    text: string;
    spans: InlineSpan[];
    sourceMap: number[];
}
export declare const EMPTY_RUN: Run;
export declare function runOf(block: Pick<ContentBlock, 'text' | 'spans' | 'sourceMap'>): Run;
/** `[start, end)` of a run. */
export declare function sliceRun(run: Run, start: number, end?: number): Run;
/** The runs one after another. */
export declare function joinRuns(...runs: Run[]): Run;
/** Words the engine sets (a label, a number), mapped to `at`. */
export declare function textRun(text: string, at: number, style?: Partial<InlineSpan>): Run;
/** A run whose spans are all set bold (or `italic`). */
export declare function styledRun(run: Run, style: Partial<Pick<InlineSpan, 'bold' | 'italic'>>): Run;
/** The run with the white space at its ends taken off. */
export declare function trimRun(run: Run): Run;
/** The run cut at every match of `sep` (a plain-text pattern), trimmed. */
export declare function splitRun(run: Run, sep: RegExp): Run[];
/** A content block of `type` holding `run`. */
export declare function blockOfRun(type: ContentBlock['type'], run: Run, fields?: Partial<ContentBlock>): ContentBlock;
//# sourceMappingURL=text.d.ts.map