import * as i0 from "@angular/core";
import { EventEmitter, OnChanges, OnInit, SimpleChanges } from "@angular/core";
export type MultiSelectRowIdentifier = string | number;
export declare class MojMultiSelectBodyDirective implements OnInit, OnChanges {
  private readonly hostElementRef;
  private readonly baseClasses;
  rowId: MultiSelectRowIdentifier;
  ariaLabel: string;
  extraClasses: string;
  selectionChange: EventEmitter<{
    rowId: MultiSelectRowIdentifier;
    checked: boolean;
  }>;
  /**
   * Synchronises the nested checkbox aria-label based on directive inputs.
   */
  private syncInputState;
  get classes(): string;
  /**
   * Applies initial input aria-label after directive initialisation.
   */
  ngOnInit(): void;
  /**
   * Re-syncs checkbox aria-label when aria-related inputs change.
   *
   * @param changes - Angular change map for current input updates.
   */
  ngOnChanges(changes: SimpleChanges): void;
  onCheckboxChange(event: Event): void;
  static ɵfac: i0.ɵɵFactoryDeclaration<MojMultiSelectBodyDirective, never>;
  static ɵdir: i0.ɵɵDirectiveDeclaration<MojMultiSelectBodyDirective, "opal-lib-govuk-checkboxes-item[opalLibMojMultiSelectBody], [opal-lib-govuk-checkboxes-item][opalLibMojMultiSelectBody]", never, {
    "rowId": {
      "alias": "rowId";
      "required": true;
    };
    "ariaLabel": {
      "alias": "ariaLabel";
      "required": false;
    };
    "extraClasses": {
      "alias": "extraClasses";
      "required": false;
    };
  }, {
    "selectionChange": "selectionChange";
  }, never, never, true, never>;
}
export declare class MojMultiSelectHeadDirective implements OnInit, OnChanges {
  private readonly hostElementRef;
  private readonly baseClasses;
  extraClasses: string;
  selectAllIndeterminate: boolean;
  ariaLabel: string;
  toggleAll: EventEmitter<boolean>;
  /**
   * Synchronises the nested checkbox UI state with directive inputs.
   * Updates indeterminate and aria-label when the input element is present.
   */
  private syncInputState;
  get classes(): string;
  /**
   * Applies the initial checkbox aria and indeterminate state after init.
   */
  ngOnInit(): void;
  /**
   * Re-syncs checkbox state when relevant inputs change.
   *
   * @param changes - Angular change map for current input updates.
   */
  ngOnChanges(changes: SimpleChanges): void;
  onCheckboxChange(event: Event): void;
  static ɵfac: i0.ɵɵFactoryDeclaration<MojMultiSelectHeadDirective, never>;
  static ɵdir: i0.ɵɵDirectiveDeclaration<MojMultiSelectHeadDirective, "opal-lib-govuk-checkboxes-item[opalLibMojMultiSelectHead], [opal-lib-govuk-checkboxes-item][opalLibMojMultiSelectHead]", never, {
    "extraClasses": {
      "alias": "extraClasses";
      "required": false;
    };
    "selectAllIndeterminate": {
      "alias": "selectAllIndeterminate";
      "required": false;
    };
    "ariaLabel": {
      "alias": "ariaLabel";
      "required": false;
    };
  }, {
    "toggleAll": "toggleAll";
  }, never, never, true, never>;
}
/**
 * Resolves a unique row id from a row value and its index.
 */
export type MultiSelectRowIdResolver<TRow, TRowId extends MultiSelectRowIdentifier> = (row: TRow, index: number) => TRowId;
/**
 * Checks whether a single row is currently selected.
 *
 * @param row - Row object to evaluate.
 * @param index - Row index passed to the id resolver.
 * @param selectedRowIds - Current selected row id set.
 * @param getRowId - Resolver used to extract row id.
 */
export declare const isMultiSelectRowSelected: <TRow, TRowId extends MultiSelectRowIdentifier>(row: TRow, index: number, selectedRowIds: ReadonlySet<TRowId>, getRowId: MultiSelectRowIdResolver<TRow, TRowId>) => boolean;
/**
 * Checks whether all visible rows are selected.
 * Returns false when there are no rows.
 *
 * @param rows - Rows currently displayed.
 * @param selectedRowIds - Current selected row id set.
 * @param getRowId - Resolver used to extract row id.
 */
export declare const areAllMultiSelectRowsSelected: <TRow, TRowId extends MultiSelectRowIdentifier>(rows: readonly TRow[], selectedRowIds: ReadonlySet<TRowId>, getRowId: MultiSelectRowIdResolver<TRow, TRowId>) => boolean;
/**
 * Checks whether selection is partial for the current rows.
 * Returns true only when at least one row is selected and at least one is unselected.
 *
 * @param rows - Rows currently displayed.
 * @param selectedRowIds - Current selected row id set.
 * @param getRowId - Resolver used to extract row id.
 */
export declare const areSomeMultiSelectRowsSelected: <TRow, TRowId extends MultiSelectRowIdentifier>(rows: readonly TRow[], selectedRowIds: ReadonlySet<TRowId>, getRowId: MultiSelectRowIdResolver<TRow, TRowId>) => boolean;
/**
 * Toggles selection for a single row id and returns a new selection set.
 *
 * @param selectedRowIds - Current selected row id set.
 * @param rowId - Row id to add or remove.
 * @param checked - True to add; false to remove.
 */
export declare const toggleMultiSelectRow: <TRowId extends MultiSelectRowIdentifier>(selectedRowIds: ReadonlySet<TRowId>, rowId: TRowId, checked: boolean) => Set<TRowId>;
/**
 * Toggles selection for all visible rows and returns a new selection set.
 * Existing ids not present in `rows` are preserved.
 *
 * @param rows - Rows currently displayed.
 * @param selectedRowIds - Current selected row id set.
 * @param getRowId - Resolver used to extract row id.
 * @param checked - True to add visible ids; false to remove visible ids.
 */
export declare const toggleAllMultiSelectRows: <TRow, TRowId extends MultiSelectRowIdentifier>(rows: readonly TRow[], selectedRowIds: ReadonlySet<TRowId>, getRowId: MultiSelectRowIdResolver<TRow, TRowId>, checked: boolean) => Set<TRowId>;