Function shouldUseForeignRules

lib/html/syntax.js:5188–5219

(
		/** @type {HtmlElement} */ ac,
		/** @type {Token} */ t
	)

	};

	const shouldUseForeignRules = (
		/** @type {HtmlElement} */ ac,
		/** @type {Token} */ t
	) => {
		if (ac.namespace === NS_HTML) return false;
		if (t.type === TOKEN_START_TAG) {
			if (
				mathmlTextIntegrationPoint(ac) &&
				t.name !== class="st">"mglyph" &&
				t.name !== class="st">"malignmark"
			) {
				return false;
			}
			if (
				ac.namespace === NS_MATHML &&
				ac.tagName === class="st">"annotation-xml" &&
				t.name === class="st">"svg"
			) {
				return false;
			}
			if (htmlIntegrationPoint(ac)) return false;
			return true;
		}
		if (t.type === TOKEN_CHAR) {
			if (mathmlTextIntegrationPoint(ac)) return false;
			if (htmlIntegrationPoint(ac)) return false;
			return true;
		}
		if (t.type === TOKEN_END_TAG) return true;
		if (t.type === TOKEN_COMMENT) return true;
		return false;
	};

	const mathmlTextIntegrationPoint = (/** @type {HtmlElement} */ el) =>
		el.namespace === NS_MATHML && MATHML_TEXT_INTEGRATION.has(el.tagName);