import type { DowncastAttributeDescriptor } from 'ckeditor5';
export interface LineHeightConfig {
    /**
     * The default value is:
     *
     * ```ts
     * const lineHeightConfig = {
     *   options: ['default', 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2, 2.5]
     * };
     * ```
     *
     * As an alternative, the line-height might be defined using numerical values (either as a `Number` or as a `String`):
     *
     * ```ts
     * const lineHeightConfig = {
     *   options: ['default', '10px', 2, '150%', '8em']
     * };
     * ```
     *
     * Also, you can define a label in the dropdown for each line-height option and customize how it will be rendered in the view:
     *
     * ```ts
     * const lineHeightConfig = {
     *   options: [
     *     'default',
     *     {
     *       title: 'Normal',
     *       model: '1',
     *     },
     *     {
     *        title: 'Custom Title',
     *        model: '48px'
     *     },
     *     {
     *       title: 'Double',
     *       model: 'double',
     *       view: {
     *         key: 'style',
     *         value: { 'line-height': '200%' },
     *       },
     *     },
     *     {
     *       title: 'Triple',
     *       model: 'triple',
     *       view: {
     *         key: 'class',
     *         value: ['line-height-triple', 'triple'],
     *       },
     *     },
     *   ]
     * };
     * ```
     *
     * Line height can be applied using the command API.
     * To do that, use the `'lineHeight'` command and pass the desired line-height as a `value`.
     *
     * ```ts
     * // For numerical values:
     * editor.execute('lineHeight', { value: 2 })
     * // For named presets:
     * editor.execute('lineHeight', { value: 'double' })
     * ```
     *
     * Executing the `lineHeight` command without value will remove the `lineHeight` attribute from the current selection.
     *
     * ```ts
     * editor.execute('lineHeight')
     * ```
     */
    options?: (string | number | LineHeightOption)[];
    /**
     * By default, all `line-height` values that are not specified in the `config.lineHeight.options` are stripped.
     * You can enable support for all line heights by using the `config.lineHeight.supportAllValues` option.
     *
     * You can preserve pasted line height values by switching the `supportAllValues` option to `true`:
     *
     * ```ts
     * const lineHeightConfig = {
     *   options: ['default', 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2, 2.5],
     *   supportAllValues: true
     * };
     * ```
     *
     * With this configuration line heights not specified in the editor configuration will not be removed when pasting the content.
     */
    supportAllValues?: boolean;
}
export interface LineHeightOption {
    /**
     * The user-readable title of the option.
     */
    title: string;
    /**
     * The attribute's unique value in the model.
     */
    model?: string;
    /**
     * View element configuration.
     */
    view?: DowncastAttributeDescriptor;
}