import * as i0 from "@angular/core";
/**
 * Enterprise keyboard navigation service for the DataGrid.
 * Centralizes all keyboard event handling including:
 * - Arrow key cell navigation
 * - Tab / Shift+Tab traversal
 * - Enter/Escape for edit mode
 * - Ctrl+Z/Y for undo/redo
 * - Ctrl+A for select all
 * - Ctrl+C/X/V for clipboard
 * - F2 for edit mode
 * - Delete for clearing cells
 */
export declare class GridKeyboardService {
    /** Currently focused cell coordinates */
    readonly focusedRow: import("@angular/core").WritableSignal<number>;
    readonly focusedCol: import("@angular/core").WritableSignal<number>;
    /** Whether the grid is in keyboard navigation mode */
    readonly isNavigating: import("@angular/core").WritableSignal<boolean>;
    /** Whether we're currently in cell edit mode */
    readonly isEditMode: import("@angular/core").WritableSignal<boolean>;
    /** Grid boundaries */
    private maxRow;
    private maxCol;
    private editableFields;
    private columnFields;
    /** Callbacks registered by the grid component */
    private handlers;
    /** Initialize the keyboard service with grid dimensions and handlers */
    initialize(config: GridKeyboardConfig): void;
    /** Update grid dimensions (e.g., after data change) */
    updateDimensions(maxRow: number, maxCol: number): void;
    /** Handle keydown events from the grid */
    handleKeyDown(event: KeyboardEvent): GridKeyboardAction | null;
    /** Set focus to a specific cell */
    setFocus(row: number, col: number): void;
    /** Clear focus */
    clearFocus(): void;
    /** Get the field name of the currently focused column */
    getFocusedField(): string | null;
    private moveFocus;
    private extendSelection;
    private canEditCurrentCell;
    static ɵfac: i0.ɵɵFactoryDeclaration<GridKeyboardService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<GridKeyboardService>;
}
export interface GridKeyboardConfig {
    maxRow: number;
    maxCol: number;
    columnFields: string[];
    editableFields?: string[];
    handlers?: GridKeyboardHandlers;
}
export interface GridKeyboardHandlers {
    onNavigate?: (row: number, col: number) => void;
    onBeginEdit?: (row: number, col: number) => void;
    onSaveEdit?: () => void;
    onCancelEdit?: () => void;
    onCopy?: () => void;
    onPaste?: () => void;
    onUndo?: () => void;
    onRedo?: () => void;
}
export interface GridKeyboardAction {
    type: 'navigate' | 'begin-edit' | 'quick-edit' | 'save-edit' | 'cancel-edit' | 'save-edit-and-move' | 'extend-selection' | 'copy' | 'cut' | 'paste' | 'undo' | 'redo' | 'select-all' | 'clear-cells';
    row?: number;
    col?: number;
    direction?: 'up' | 'down' | 'left' | 'right';
    char?: string;
}