import type IgcTreeComponent from './tree.js';
import type IgcTreeItemComponent from './tree-item.js';
export declare class IgcTreeSelectionService {
    private tree;
    private itemSelection;
    private indeterminateItems;
    private itemsToBeSelected;
    private itemsToBeIndeterminate;
    constructor(tree: IgcTreeComponent);
    /** Select range from last selected item to the current specified item. */
    selectMultipleItems(item: IgcTreeItemComponent): void;
    /** Select the specified item and emit event. */
    selectItem(item: IgcTreeItemComponent): void;
    /** Deselect the specified item and emit event. */
    deselectItem(item: IgcTreeItemComponent): void;
    /** Clears item selection */
    clearItemsSelection(): void;
    isItemSelected(item: IgcTreeItemComponent): boolean;
    isItemIndeterminate(item: IgcTreeItemComponent): boolean;
    /** Called on item`s disconnectedCallback */
    ensureStateOnItemDelete(item: IgcTreeItemComponent): void;
    /** Retrigger the selection state of the item. */
    retriggerItemState(item: IgcTreeItemComponent): void;
    private emitItemSelectionEvent;
    /** Select specified items. No event is emitted. */
    selectItemsWithNoEvent(items: IgcTreeItemComponent[]): void;
    /** Deselect specified items. No event is emitted. */
    deselectItemsWithNoEvent(items?: IgcTreeItemComponent[], onDelete?: boolean): void;
    private emitCascadeItemSelectionEvent;
    private cascadeSelectItemsWithNoEvent;
    private cascadeDeselectItemsWithNoEvent;
    /**
     * populates the itemsToBeSelected and itemsToBeIndeterminate sets
     * with the items which will be eventually in selected/indeterminate state
     */
    private calculateItemsNewSelectionState;
    /** Ensures proper selection state for all predescessors and descendants during a selection event */
    private cascadeSelectionState;
    /**
     * recursively handle the selection state of the direct and indirect parents
     */
    private handleParentSelectionState;
    /**
     * Handle the selection state of a given item based the selection states of its direct children
     */
    private handleItemSelectionState;
    /** Emits the `selectedChange` event for each item affected by the selection */
    private updateItemsState;
    /** Returns array of the selected items. */
    private getSelectedItems;
    /** Returns array of the items in indeterminate state. */
    private getIndeterminateItems;
    private areEqualCollections;
    private selectDeselectItem;
}