import { KanbanColumnBand } from "./grouping.js";
import { KanbanBoardColumn } from "./matrix.js";
//#region src/kanban/column-bands.d.ts
/**
 * Column bands: named runs of adjacent columns the board shows under one
 * header and can collapse as a unit.
 *
 * A band is presentation over the column order, never a second axis: cards
 * keep their column, and the matrix stays the placement authority. The board
 * only needs to know which adjacent columns share a header, which is what
 * `resolveKanbanColumnBands` derives from the columns' `band` metadata.
 */
/** Every board column takes this inline size; a collapsed band takes one lane. */
export declare const KANBAN_COLUMN_WIDTH_CLASS = "w-[300px] shrink-0";
export declare const KANBAN_COLUMN_WIDTH_PX = 300;
/** The `gap-3` between columns, so a band header can span its columns. */
export declare const KANBAN_COLUMN_GAP_PX = 12;
/** A collapsed band folds its columns into one narrow lane. */
export declare const KANBAN_COLLAPSED_BAND_WIDTH_CLASS = "w-12 shrink-0";
export declare const KANBAN_COLLAPSED_BAND_WIDTH_PX = 48;
/**
 * A run of adjacent columns under one header. `band` is `null` for a column
 * that belongs to no band, which renders as a run of one without a header.
 */
export type KanbanColumnBandSpan = {
  band: KanbanColumnBand | null;
  columns: KanbanBoardColumn[];
};
/**
 * Group the presented columns into bands, in column order.
 *
 * Bands must be contiguous: the same band id appearing again after a column
 * of another band (or of none) is a programming error in the caller's schema,
 * not a state to render, because a header that spans two separate runs has no
 * meaning. The check fails loudly instead of silently drawing a second header.
 */
export declare const resolveKanbanColumnBands: (columns: readonly KanbanBoardColumn[]) => KanbanColumnBandSpan[];
/** Whether any presented column carries band metadata. */
export declare const hasKanbanColumnBands: (columns: readonly KanbanBoardColumn[]) => boolean;
//#endregion