import type { Context2D } from "../canvas-types";
import { PlotLayout } from "../../layout/plot-layout";
import type { Theme } from "../../theme/theme";
import type { CategoricalDomain } from "../../axis/categorical-axis";
interface LevelTickLayout {
    size: number;
}
export interface CategoricalYAxisOptions {
    /**
     * Drop the innermost level of the domain before rendering, promoting
     * the second-to-last level into the leaf position. Used by the
     * heatmap, whose column names encode `split…|aggregate` — with a
     * single aggregate the leaf level is a redundant constant column,
     * and showing the last split as the leaf reads more naturally.
     *
     * No-op when `levels.length <= 1` (there's nothing left to promote);
     * the axis renders nothing in that case.
     */
    skipLeafLevel?: boolean;
}
/**
 * Map a Y category index to a pixel y-coordinate. Matches the convention
 * chosen for the heatmap plot: yIdx=0 sits at the *bottom* (math Y-up),
 * so a higher yIdx maps to a lower pixel value via `dataToPixel`'s
 * standard (1 - t) flip.
 */
export declare function categoryIndexToPixelY(layout: PlotLayout, index: number): number;
/**
 * Per-level widths for a vertical categorical axis. Leaf width is
 * derived from the longest label in that level's dictionary; outer
 * levels get a fixed narrow column for the bracket + short text.
 */
export declare function measureCategoricalYLevels(domain: CategoricalDomain, opts?: CategoricalYAxisOptions): LevelTickLayout[];
/**
 * Total CSS-pixel width required for the categorical tick band (levels),
 * NOT including the per-axis-label allowance. Caller feeds this to
 * `PlotLayout` as `leftExtra`; the axis label is added via `hasYLabel`.
 */
export declare function measureCategoricalAxisWidth(domain: CategoricalDomain, opts?: CategoricalYAxisOptions): number;
/**
 * Render hierarchical Y-axis tick marks, leaf labels, and outer-level
 * bracket labels on the chrome canvas. The axis line is drawn by the
 * caller alongside the X axis.
 */
export declare function renderCategoricalYTicks(ctx: Context2D, layout: PlotLayout, domain: CategoricalDomain, theme: Theme, opts?: CategoricalYAxisOptions): void;
export {};