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Reimplement MD025/single-title/single-h1 using micromark tokens.

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David Anson 2024-06-08 20:41:40 -07:00
parent 6daaa43410
commit ea9659841e
5 changed files with 82 additions and 38 deletions
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36
demo/markdownlint-browser.js
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@ -4671,8 +4671,9 @@ module.exports = {
const { addErrorContext, filterTokens, frontMatterHasTitle } =
__webpack_require__(/*! ../helpers */ "../helpers/helpers.js");
const { addErrorContext, frontMatterHasTitle } = __webpack_require__(/*! ../helpers */ "../helpers/helpers.js");
const { filterByTypes, getHeadingLevel, inHtmlFlow } =
__webpack_require__(/*! ../helpers/micromark.cjs */ "../helpers/micromark.cjs");
// eslint-disable-next-line jsdoc/valid-types
/** @type import("./markdownlint").Rule */
@ -4680,26 +4681,41 @@ module.exports = {
"names": [ "MD025", "single-title", "single-h1" ],
"description": "Multiple top-level headings in the same document",
"tags": [ "headings" ],
"parser": "markdownit",
"parser": "micromark",
"function": function MD025(params, onError) {
const level = Number(params.config.level || 1);
const tag = "h" + level;
const foundFrontMatterTitle =
frontMatterHasTitle(
params.frontMatterLines,
params.config.front_matter_title
);
let hasTopLevelHeading = false;
filterTokens(params, "heading_open", function forToken(token) {
if (token.tag === tag) {
const headings = filterByTypes(
params.parsers.micromark.tokens,
[ "atxHeading", "setextHeading" ]
);
for (const heading of headings) {
const headingLevel = getHeadingLevel(heading);
if ((headingLevel === level) && !inHtmlFlow(heading)) {
if (hasTopLevelHeading || foundFrontMatterTitle) {
addErrorContext(onError, token.lineNumber,
token.line.trim());
} else if (token.lineNumber === 1) {
const headingTexts = filterByTypes(
heading.children,
[ "atxHeadingText", "setextHeadingText" ]
);
const headingText = headingTexts.
map((token) => token.text).
join(" ").
replace(/[\r\n]+/g, " ");
addErrorContext(
onError,
heading.startLine,
headingText
);
} else if (heading.startLine === 1) {
hasTopLevelHeading = true;
}
}
});
}
}
};