import { LayoutEngine } from '../virtualization/LayoutEngine';
import { Column } from '../models/Column';
import { ColumnGroup } from '../models/ColumnGroup';
import { DataView } from '../data/DataView';
import { GridState } from '../core/GridState';
import { GroupHeaderTemplate } from './GroupHeader';
import { RowClass, RowStyle } from '../core/GridOptions';
import { CellRange } from '../models/Cell';
/** Resolved merge lookup: the span a cell belongs to, or null when it stands alone. */
export type MergeLookup = (row: number, col: number) => CellRange | null;
/**
 * Everything a render pass needs, passed in fresh each frame so the renderers
 * never hold a stale reference to the data, columns, or layout.
 */
export interface RenderContext {
    layout: LayoutEngine;
    columns: Column[];
    data: DataView;
    state: GridState;
    /** Optional custom renderer for group-header row labels. */
    groupHeaderTemplate?: GroupHeaderTemplate;
    /** Optional conditional class(es) for data rows. */
    rowClass?: RowClass;
    /** Optional conditional inline styles for data rows. */
    rowStyle?: RowStyle;
    /** Optional cell-merge lookup. Present only when merging is enabled. */
    merge?: MergeLookup;
    /** Active column-header groups. Consumed by the ColumnGroupRenderer. */
    columnGroups?: ColumnGroup[];
}