import type { VDTColumn, VDTColumnRule, VDTDocument, VDTFootnoteArea, VDTPage } from './vdt.js';
/** The column rule `page` draws: its own (a styled section's, see
 *  `VDTPage.columnRule`), else the document's `layout.columnRule`. Shared
 *  by the canvas and PDF backends. */
export declare function pageColumnRule(page: Pick<VDTPage, 'columnRule'>, doc: Pick<VDTDocument, 'config'>): VDTColumnRule;
/** One vertical rule segment between two adjacent text columns of a band. */
export interface ColumnRuleSegment {
    /** Horizontal centre of the gutter. */
    x: number;
    top: number;
    bottom: number;
}
/**
 * Compute the column-rule segments of a page: one per gutter between
 * adjacent text columns of the same band, spanning the taller of the two
 * columns. Full-width `kind: 'span'` columns (page-span blocks) never take
 * part, so the rule stops at a span block and resumes with the next band
 * — the ruling a compositor would draw. Under a page-span heading's opener
 * band it starts where the text does. A gutter between two columns that
 * hold nothing (a band closed before any text landed, the empty columns
 * left beside a closing page's text, the grid line a page-span opener
 * leaves under its band before a page-span box) is not ruled; a zero-height column
 * (one a float filled) still bounds its gutters, which then run the length
 * of its neighbour — beside the float, never through it (#505). A closing
 * band ends its columns on the grid line under its text, cut level by a
 * trailing cap or closed where it stood when it was level already (#713):
 * the rule ends there, and runs on only beside the notes at a column's
 * foot. Bands are visited in column order, which is band order because
 * bands are always appended.
 */
export declare function columnRuleSegments(columns: readonly VDTColumn[], 
/** The page's footnote areas: the rule runs on beside the notes set at a
 *  column's foot (which the column's box no longer covers). */
footnoteAreas?: readonly VDTFootnoteArea[]): ColumnRuleSegment[];
/** A horizontal footnote separator rule: its left end, the y of its centre
 *  line, length, thickness (px) and colour. */
export interface FootnoteRuleSegment {
    x: number;
    y: number;
    width: number;
    lineWidthPx: number;
    color: string;
}
/** The footnote separator rules of a page (one per column holding notes). */
export declare function footnoteRuleSegments(page: Pick<VDTPage, 'footnoteAreas'>): FootnoteRuleSegment[];
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