1 files changed, 54 insertions, 0 deletions
diff --git a/alarm/node_modules/jsdom/lib/jsdom/living/helpers/document-base-url.js b/alarm/node_modules/jsdom/lib/jsdom/living/helpers/document-base-url.js
new file mode 100644
index 0000000..f69e061
--- /dev/null
+++ b/alarm/node_modules/jsdom/lib/jsdom/living/helpers/document-base-url.js
@@ -0,0 +1,54 @@
+"use strict";
+const whatwgURL = require("whatwg-url");
+const { implForWrapper } = require("../generated/utils");
+
+exports.documentBaseURL = document => {
+  // https://html.spec.whatwg.org/multipage/infrastructure.html#document-base-url
+
+  const firstBase = document.querySelector("base[href]");
+  const fallbackBaseURL = exports.fallbackBaseURL(document);
+
+  if (firstBase === null) {
+    return fallbackBaseURL;
+  }
+
+  return frozenBaseURL(firstBase, fallbackBaseURL);
+};
+
+exports.documentBaseURLSerialized = document => {
+  return whatwgURL.serializeURL(exports.documentBaseURL(document));
+};
+
+exports.fallbackBaseURL = document => {
+  // https://html.spec.whatwg.org/multipage/infrastructure.html#fallback-base-url
+
+  // Unimplemented: <iframe srcdoc>
+
+  if (document.URL === "about:blank" && document._defaultView &&
+      document._defaultView._parent !== document._defaultView) {
+    const parentDocument = implForWrapper(document._defaultView._parent._document);
+    return exports.documentBaseURL(parentDocument);
+  }
+
+  return document._URL;
+};
+
+exports.parseURLToResultingURLRecord = (url, document) => {
+  // https://html.spec.whatwg.org/#resolve-a-url
+
+  // Encoding stuff ignored; always UTF-8 for us, for now.
+
+  const baseURL = exports.documentBaseURL(document);
+
+  return whatwgURL.parseURL(url, { baseURL });
+  // This returns the resulting URL record; to get the resulting URL string, just serialize it.
+};
+
+function frozenBaseURL(baseElement, fallbackBaseURL) {
+  // https://html.spec.whatwg.org/multipage/semantics.html#frozen-base-url
+  // The spec is eager (setting the frozen base URL when things change); we are lazy (getting it when we need to)
+
+  const baseHrefAttribute = baseElement.getAttributeNS(null, "href");
+  const result = whatwgURL.parseURL(baseHrefAttribute, { baseURL: fallbackBaseURL });
+  return result === null ? fallbackBaseURL : result;
+}