import { MarkdownEditorHighlightColor } from './types';
/**
 * The highlighter in the source: `==text==` for the default colour, and
 * `<mark data-color>` for the others, which Markdown has no syntax for.
 *
 * A line is read the way the renderer reads it, so `==` in an escape, a code
 * span, a tag or a bare URL opens nothing.
 */
export interface MarkdownHighlight {
    /** Where the opening `==` or `<mark>` starts. */
    from: number;
    /** The content, between the delimiters. */
    start: number;
    end: number;
    /** Where the closing delimiter ends. */
    to: number;
    color: MarkdownEditorHighlightColor;
}
/** A `<mark>` without a colour of the palette is the default one. */
export declare function highlightColorOf(tag: string): MarkdownEditorHighlightColor;
/**
 * How much of `text` at `pos` hides `==` from the highlighter, ending by `to`:
 * an escape, a code span, a tag or a URL. 0 for plain text.
 */
export declare function opaqueAt(text: string, pos: number, to: number): number;
/**
 * `==text==` at `pos`, on one line: where its content ends, or -1. The content
 * starts with neither a space nor another `=`, and ends at the first `==`
 * after a character that is not a space; one in an escape, a code span or a
 * tag does not count. That first `==` is why the serializer escapes `=`.
 */
export declare function highlightEnd(text: string, pos: number, to?: number): number;
/** The highlights on the line holding `pos`, nested ones included, by where they open. */
export declare function markdownHighlightsOnLine(doc: string, pos: number): MarkdownHighlight[];
/** The innermost highlight whose content holds `pos`, its edges included. */
export declare function markdownHighlightAt(doc: string, pos: number): MarkdownHighlight | null;