import type { EditorInputAdapter, EditorInputState } from "./contracts";
/**
 * Default textarea-based input adapter.
 *
 * This adapter provides a lightweight editing experience
 * using a native HTMLTextAreaElement.
 *
 * Responsibilities:
 *
 * - manage editor content
 * - track cursor and selection state
 * - notify content changes
 * - support content insertion at the current selection
 */
export declare class TextareaInputAdapter implements EditorInputAdapter {
    private textarea;
    private listeners;
    /**
     * Creates and mounts the editor textarea.
     *
     * Change events are forwarded to all registered
     * listeners.
     */
    mount(element: HTMLElement, initialValue: string): void;
    /**
     * Returns the current editor state.
     *
     * The returned state contains the current content
     * and selection information used by commands and
     * content insertion operations.
     */
    getState(): EditorInputState;
    setSelection(start: number, end: number): void;
    getValue(): string;
    setValue(value: string): void;
    /**
     * Inserts content at the current cursor position.
     *
     * If text is currently selected, the selection is
     * replaced by the provided content.
     *
     * After insertion, the cursor is moved to the end
     * of the inserted content and change listeners are
     * notified.
     */
    insertContent(content: string): void;
    focus(): void;
    onChange(listener: (value: string) => void): () => void;
    destroy(): void;
    private generateId;
    /**
     * Applies default attributes to the editor textarea.
     */
    private setTextareaAttributes;
    /**
     * Returns the mounted textarea element.
     *
     * @throws Error When the adapter has not been mounted.
     */
    private getElement;
}