import { MarkdownEditorCalloutType, MarkdownEditorHighlightColor, MarkdownEditorSelection, MarkdownTextChange } from './types';
/**
 * Toolbar commands and editing shortcuts as source edits.
 *
 * Every surface, the history and the collaboration transport work in Markdown
 * offsets, so a command is computed once from the document and the selection
 * and then applied wherever the user is: the rich surface re-renders the
 * blocks it touched, the source editor dispatches it, and a peer receives the
 * same change set.
 */
export interface MarkdownEdit {
    changes: MarkdownTextChange[];
    selection: MarkdownEditorSelection;
}
export type MarkdownInlineFormat = 'bold' | 'italic' | 'strike' | 'code';
export type MarkdownLineFormat = 'quote' | 'bulletList' | 'orderedList' | 'taskList';
export type MarkdownFormatAction = {
    type: MarkdownInlineFormat;
}
/**
 * Highlights the selection in `color`; null takes the highlight off. With
 * `toggle`, a selection that is highlighted all through loses it instead.
 */
 | {
    type: 'highlight';
    color: MarkdownEditorHighlightColor | null;
    toggle?: boolean;
} | {
    type: MarkdownLineFormat;
}
/** The selected lines as a callout; in a quote, the quote becomes one. */
 | {
    type: 'callout';
    callout: MarkdownEditorCalloutType;
}
/** Without `level`, toggles a level-2 heading. 0 turns headings back into paragraphs. */
 | {
    type: 'heading';
    level?: number;
}
/** An empty `href` removes the link around the selection. */
 | {
    type: 'link';
    href: string;
} | {
    type: 'image';
    src: string;
    alt?: string;
    title?: string;
} | {
    type: 'table';
    columns?: number;
    rows?: number;
    header?: string;
} | {
    type: 'codeBlock';
    language?: string;
} | {
    type: 'math';
    tex?: string;
    display?: boolean;
} | {
    type: 'divider';
} | {
    type: 'insert';
    text: string;
    block?: boolean;
};
/** Tab and Shift+Tab on list items: nests under the item above, or moves up a level. */
export declare function indentMarkdownList(doc: string, selection: MarkdownEditorSelection, direction: 1 | -1): MarkdownEdit | null;
/**
 * Enter in a list item or a quote: the next item, numbered and boxed like this
 * one. An empty item ends the list instead, one level at a time.
 */
export declare function continueMarkdownList(doc: string, selection: MarkdownEditorSelection): MarkdownEdit | null;
/** The destination of the link whose label holds the selection, for editing it; null outside a link. */
export declare function markdownLinkAt(doc: string, selection: MarkdownEditorSelection): string | null;
/** One toolbar or shortcut command against the source; null when it does not apply. */
export declare function formatMarkdown(doc: string, selection: MarkdownEditorSelection, action: MarkdownFormatAction): MarkdownEdit | null;