import type { RenderedShape } from "./types.js";
import type { ViewportController } from "./viewport.js";
/**
 * Handles keyboard navigation for the BPMN canvas.
 *
 * ## Key bindings
 * | Key | Action |
 * |-----|--------|
 * | `←` `→` `↑` `↓` | Pan viewport |
 * | `+` / `=` | Zoom in |
 * | `-` | Zoom out |
 * | `0` / `Home` | Fit diagram to view |
 * | `Tab` | Focus next element |
 * | `Shift+Tab` | Focus previous element |
 * | `Enter` / `Space` | Activate focused element (fires `element:click`) |
 * | `Escape` | Return focus to canvas container |
 *
 * The canvas container uses `role="application"` so screen readers pass
 * all key presses to the application rather than handling them natively.
 */
export declare class KeyboardHandler {
    private readonly _container;
    private readonly _viewport;
    private readonly _onFit;
    private readonly _onActivate;
    private readonly _onFocus;
    private readonly _onBlur;
    private _shapes;
    private _focusIndex;
    constructor(_container: HTMLElement, _viewport: ViewportController, _onFit: () => void, _onActivate: (id: string) => void, _onFocus: (id: string) => void, _onBlur: () => void);
    /** Updates the navigable shape list after a diagram (re)load. */
    setShapes(shapes: RenderedShape[]): void;
    /**
     * Swaps in the re-rendered graphics of one shape after an incremental
     * update, keeping focus position and avoiding a DOM read per shape.
     */
    updateShape(shape: RenderedShape): void;
    /** Removes all keyboard event listeners. */
    destroy(): void;
    private _focusShape;
    private _clearFocus;
    private readonly _onKeyDown;
    private readonly _onFocusOut;
}
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