Function validateEmphasize

packages/muya/src/inlineRenderer/utils.ts:226–256

(src: string, offset: number, marker: string, pending: string, rules: Rules)

}

export function validateEmphasize(src: string, offset: number, marker: string, pending: string, rules: Rules) {
    if (!canOpenEmphasis(src, marker, pending))
        return false;

    if (!canCloseEmphasis(src, offset, marker))
        return false;

    /**
     * 16.When there are two potential emphasis or strong emphasis spans with the same closing delimiter,
     * the shorter one (the one that opens later) takes precedence. Thus, for example, **foo **bar baz**
     * is parsed as **foo <strong>bar baz</strong> rather than <strong>foo **bar baz</strong>.
     */
    const mLen = marker.length;
    const emphasizeText = src.substring(mLen, offset - mLen);
    const SHORTER_REG = new RegExp(
        ` \\${marker.split('').join('\\')}[^\\${marker.charAt(0)}]`,
    );
    const CLOSE_REG = new RegExp(
        `[^\\${marker.charAt(0)}]\\${marker.split('').join('\\')}`,
    );
    if (SHORTER_REG.test(emphasizeText) && !CLOSE_REG.test(emphasizeText))
        return false;

    /**
     * 17.Inline code spans, links, images, and HTML tags group more tightly than emphasis.
     * So, when there is a choice between an interpretation that contains one of these elements
     * and one that does not, the former always wins. Thus, for example, *[foo*](bar) is parsed
     * as *<a href="bar">foo*</a> rather than as <em>[foo</em>](bar).
     */
    return lowerPriority(src, offset, rules);
}

export function correctUrl(token: string[] | null) {
    if (token && typeof token[4] === 'string') {