/**
 * @license Copyright (c) 2003-2026, CKSource Holding sp. z o.o. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-licensing-options
 */
/**
 * @module media-embed/mediaembedstyle/mediaembedstylecommand
 */
import { Command, type Editor } from '@ckeditor/ckeditor5-core';
import type { NormalizedMediaStyleOption } from '../mediaembedconfig.js';
/**
 * The media embed style command. It is used to apply a style option (e.g. an alignment) to a
 * selected media embed.
 *
 * The set of accepted style values comes from the resolved
 * {@link module:media-embed/mediaembedconfig~MediaEmbedConfig#styles `config.mediaEmbed.styles`}
 * options. Values not in that set are silently rejected by {@link #execute}.
 */
export declare class MediaEmbedStyleCommand extends Command {
    /**
     * The currently-applied style name. `false` when no style applies — either no media is
     * selected, or the selected media has no `mediaStyle` attribute and no style in
     * {@link module:media-embed/mediaembedconfig~MediaEmbedConfig#styles `config.mediaEmbed.styles`}
     * is marked `isDefault: true`.
     */
    value: string | false;
    /**
     * Resolved styles indexed by `name`. Used to look up the `isDefault` flag at execute time
     * (any default-marked style clears the attribute) and to validate that a requested style
     * is part of the resolved options list.
     */
    private readonly _styles;
    /**
     * The `name` of the first style with `isDefault: true` in the resolved options, or `null`
     * when the integrator did not designate a default. Exposed via {@link #value} when the
     * selected media has no `mediaStyle` attribute, so the default-state UI button can light up.
     * Does not gate the "clear attribute" branch in {@link #execute} — that uses the per-style
     * `isDefault` flag so multi-default configs behave consistently with the downcast.
     */
    private readonly _defaultStyleName;
    /**
     * Creates an instance of the media embed style command.
     *
     * @param editor The editor instance.
     * @param styles The resolved list of style options that this command will accept.
     */
    constructor(editor: Editor, styles: Array<NormalizedMediaStyleOption>);
    /**
     * @inheritDoc
     */
    refresh(): void;
    /**
     * Executes the command and applies the chosen style to the currently selected media embed.
     *
     * ```ts
     * editor.execute( 'mediaStyle', { value: 'alignLeft' } );
     * editor.execute( 'mediaStyle', { value: 'alignCenter' } ); // removes the attribute — alignCenter is the built-in default
     * editor.execute( 'mediaStyle', { value: null } );          // removes the attribute
     * ```
     *
     * The default style is encoded on the model as the absence of the `mediaStyle` attribute.
     * Passing any `isDefault: true` style name (or `null`) therefore clears the attribute. Values
     * that are neither falsy, an `isDefault` style, nor present in the resolved options list are
     * silently rejected.
     *
     * @param options
     * @param options.value The name of the style to apply, or `null` to clear the alignment.
     * @fires execute
     */
    execute(options: {
        value: string | null;
    }): void;
}