export function createLinks(
urlResolver: UrlResolver,
html: string,
baseUrl: ResolvedUrl,
deps: Set<ResolvedUrl>,
absolute: boolean = false): string {
const ast = parse5.parse(html, {locationInfo: true});
const baseTag = dom5.query(ast, dom5.predicates.hasTagName('base'));
const baseTagHref = baseTag ? dom5.getAttribute(baseTag, 'href') : '';
// parse5 always produces a <head> element.
const head = dom5.query(ast, dom5.predicates.hasTagName('head'))!;
for (const dep of deps) {
let href;
if (absolute && !baseTagHref) {
href = absUrl(urlResolver.relative(dep));
} else {
href = urlResolver.relative(baseUrl, dep);
}
const link = dom5.constructors.element('link');
dom5.setAttribute(link, 'rel', 'prefetch');
dom5.setAttribute(link, 'href', href);
dom5.append(head, link);
}
dom5.removeFakeRootElements(ast);
return parse5.serialize(ast);
}
getAnalyzerUrl(document: {uri: string}): ResolvedUrl|undefined {
return this.urlResolver.resolve(document.uri as PackageRelativeUrl);
}