/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */
import type { LexicalEditor } from 'lexical';
/**
 * @internal
 * Register the keyboard and command handlers that drive code-block
 * indentation: Tab / Shift+Tab, INDENT/OUTDENT_CONTENT_COMMAND,
 * INSERT_TAB_COMMAND, alt+arrow line shifting, and Home/End movement.
 *
 * Both `@lexical/code-shiki` and `@lexical/code-prism` use this via
 * {@link CodeIndentExtension}; callers using `registerCodeHighlighting`
 * will implicitly call this with tabSize of `undefined`.
 *
 * @param editor The editor to register on.
 * @param tabSize When set, OUTDENT_CONTENT_COMMAND (Shift+Tab) also strips
 *   up to that many leading spaces from a code line. See
 *   {@link $outdentLeadingSpaces}.
 */
export declare function registerCodeIndentation(editor: LexicalEditor, tabSize?: number, escapeWithArrows?: boolean): () => void;
export interface CodeIndentConfig {
    /**
     * When true, the indent commands are not registered on the editor.
     * This signal can be flipped at runtime to enable or disable indent
     * handling without rebuilding the editor.
     */
    disabled: boolean;
    /**
     * When set, treats that many leading spaces on a code line as one indent
     * level for the OUTDENT_CONTENT_COMMAND (Shift+Tab). See
     * {@link registerCodeIndentation}. When undefined (the default), only
     * TabNode removal is supported on outdent.
     *
     * Tab and INSERT_TAB_COMMAND continue to insert a TabNode regardless of
     * this option.
     */
    tabSize: number | undefined;
    /**
     * When `true`, this enables the ability to exit a code block
     * that has no adjacent elements using the ArrowLeft/ArrowUp keys
     * if the cursor is at the beginning, or the ArrowRight/ArrowDown keys
     * if the cursor is at the end.
     * When `false` (default), pressing the arrow keys will not move the cursor
     * if there are no adjacent elements around the code block
     */
    escapeWithArrows: boolean;
}
/**
 * Adds keyboard-driven indentation to code blocks (Tab / Shift+Tab,
 * alt+arrow line shifts, Home/End within a line). Both
 * {@link "@lexical/code-shiki".CodeShikiExtension} and
 * {@link "@lexical/code-prism".CodePrismExtension} declare this as a
 * dependency, so it is activated automatically alongside either
 * highlighter.
 *
 * Code blocks without syntax highlighting can use this extension on its
 * own.
 */
export declare const CodeIndentExtension: import("lexical").LexicalExtension<CodeIndentConfig, "@lexical/code-indent", import("@lexical/extension").NamedSignalsOutput<CodeIndentConfig>, unknown>;