markdownlint/lib/md033.js

// @ts-check

"use strict";

const { addError } = require("../helpers");
const { filterByTypes, getHtmlTagInfo, parse } =
  require("../helpers/micromark.cjs");

const nextLinesRe = /[\r\n][\s\S]*$/;

module.exports = {
  "names": [ "MD033", "no-inline-html" ],
  "description": "Inline HTML",
  "tags": [ "html" ],
  "function": function MD033(params, onError) {
    let allowedElements = params.config.allowed_elements;
    allowedElements = Array.isArray(allowedElements) ? allowedElements : [];
    allowedElements = allowedElements.map((element) => element.toLowerCase());
    const pending = [ [ 0, params.parsers.micromark.tokens ] ];
    let current = null;
    while ((current = pending.shift())) {
      const [ offset, tokens ] = current;
      for (const token of filterByTypes(tokens, [ "htmlFlow", "htmlText" ])) {
        if (token.type === "htmlText") {
          const htmlTagInfo = getHtmlTagInfo(token);
          if (
            htmlTagInfo &&
            !htmlTagInfo.close &&
            !allowedElements.includes(htmlTagInfo.name.toLowerCase())
          ) {
            const range = [
              token.startColumn,
              token.text.replace(nextLinesRe, "").length
            ];
            addError(
              onError,
              token.startLine + offset,
              "Element: " + htmlTagInfo.name,
              undefined,
              range
            );
          }
        } else {
          // token.type === "htmlFlow"
          // Re-parse without "htmlFlow" to get only "htmlText" tokens
          const options = {
            "extensions": [
              {
                "disable": {
                  "null": [ "codeIndented", "htmlFlow" ]
                }
              }
            ]
          };
          // Use lines instead of token.text for accurate columns
          const lines =
            params.lines.slice(token.startLine - 1, token.endLine).join("\n");
          const flowTokens = parse(lines, options);
          pending.push(
            [ token.startLine - 1, flowTokens ]
          );
        }
      }
    }
  }
};