import type { MetadataField } from './metadata-style.types.js';
/**
 * The run of metadata lines of a task file, located and parsed.
 */
export interface MetadataBlock {
    /** The fields, in file order, with the marking removed. */
    readonly fields: readonly MetadataField[];
    /**
     * The raw metadata lines, as written — what a style's `matches` inspects.
     * Blank lines found inside the run are not here, but are inside
     * `start`..`end` and therefore disappear when the block is rewritten.
     */
    readonly lines: readonly string[];
    /** Index of the first block line in the split content. */
    readonly start: number;
    /** Index just past the last block line. */
    readonly end: number;
}
/**
 * Locates and parses the metadata block, or returns `undefined` when the file
 * has none.
 *
 * The block is the first run of consecutive metadata lines in the header. It
 * has to be a run, and not every matching line in the header, so that prose
 * following the block is left alone.
 */
export declare function readMetadataBlock(content: string): MetadataBlock | undefined;
/**
 * Replaces the metadata block with `newLines`, or inserts one after the H1
 * when the file has none.
 *
 * Inserting after the H1 (and not at the top) is what the previous
 * `setInlineField` did, and it is the only position that keeps the title first.
 */
export declare function replaceMetadataBlock(content: string, newLines: readonly string[]): string;
/**
 * Removes the metadata block, and the blank line it left behind.
 */
export declare function removeMetadataBlock(content: string): string;
/** Labels are compared case-insensitively, the way every reader already did. */
export declare const sameLabel: (a: string, b: string) => boolean;
//# sourceMappingURL=metadata-block.d.ts.map