/**
 * AnnotationRenderer — overlays annotation visuals on top of sequence cells.
 *
 * Performance contract:
 * - When no annotations exist, `hasAnnotations()` returns false and callers skip all drawing.
 * - Parsed annotation data is cached by column version; re-parsed only on change.
 * - The companion row-data column (hidden, name starting with ~) is re-looked up when the
 *   sequence column version changes (so it's found even when created after first render).
 */
import * as DG from 'datagrok-api/dg';
import { SeqAnnotation, SeqAnnotationHit } from './macromolecule/annotations';
export declare class AnnotationRenderer {
    private tableCol;
    private _cache;
    private _rowCache;
    private _annotCol;
    /** Version of tableCol at which _annotCol was last looked up.
     *  Re-lookup when version changes (setting .annotationColumnName tag bumps it). */
    private _annotColLookupVersion;
    constructor(tableCol: DG.Column<string>);
    /** Fast check — returns false when no annotations exist, so the render loop can skip entirely. */
    hasAnnotations(): boolean;
    /** Returns region annotations (column-level). */
    getAnnotations(): SeqAnnotation[];
    /** Returns the region name at a given position for a specific row.
     *  Checks per-row region spans first; falls back to column-level only when
     *  the row has no per-row region data at all. */
    getRegionNameAtPosition(posIdx: number, rowIdx?: number): string | null;
    /** Returns liability hits (non-region) for a specific row and position index. */
    getHitsAtPosition(rowIdx: number, posIdx: number): SeqAnnotationHit[];
    /** Draws annotation background + underline for a single position in a cell.
     *  Called from MonomerPlacer.render() for each visible position.
     *  @param textBottomY If provided, underline is drawn just below this y-coordinate
     *    (use in single-line mode so the underline sticks to the letters). */
    drawPositionBackground(g: CanvasRenderingContext2D, x: number, y: number, w: number, h: number, posIdx: number, rowIdx: number, textBottomY?: number): void;
    /** Builds a tooltip HTML snippet for annotations at a given position+row. */
    getTooltipInfo(posIdx: number, rowIdx: number): string[];
    /** Finds a per-row region span hit covering the given position, or null. */
    private _findRowRegionHit;
    /** Returns true if the row has any per-row region span data (hits with endPositionIndex set).
     *  When true, column-level region mapping should NOT be used as fallback for this row. */
    private _rowHasRegionData;
    private _ensureCache;
    private _ensureRowCache;
    private _getPosList;
    private _getDefaultRegionColor;
}
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