Add url, site, page options(in addition to still having html and node),

for parsing of external content.  This defers back into remote-content,
as needed.

 ---
 import { parseHtml, createMatcher, findNode } from './html.ts'
+import { getUrl, getSitePage } from './remote-content.ts'
 import Match from './match.astro'
 
-const { props } = Astro
-const { debug, replacers, slotHandler } = props
+export const getHtmlFromProps = (props) => {
+  const { site, page, url, html } = props
+  if (html) return { data: html }
+  if (url) return getUrl(url)
+  if (site && page) return getSitePage(site, page)
+  return { data: null }
+}
+
+export const getDocFromProps = async (props, options) => {
+  if (props.node) return props.node;
+  const { data: html } = await getHtmlFromProps(props)
+  const adjuster = createAdjuster(props.adjustments)
+  return parseHtml(html, { ...options, adjuster })
+}
 
-const adjustmentsCompiled = Object.entries(adjustments).map(([ selector, handler ]) => [ createMatcher(selector), handler ])
-const adjuster = (node, parent, index) => {
-  for (const [ matcher, handler ] of adjustmentsCompiled) {
-    if (matcher(node, parent, index, false)) {
-      node = handler(node)
+export const getNodeFromProps = async (props, options) => {
+  const doc = await getDocFromProps(props, options)
+  const { xpath } = props
+  return xpath ? findNode(doc, xpath) : doc
+}
+
+export const createAdjuster = (adjustments = {}) => {
+  const adjustmentsCompiled = Object.entries(adjustments).map(([ selector, handler ]) => [ createMatcher(selector), handler ])
+  const adjuster = (node, parent, index) => {
+    for (const [ matcher, handler ] of adjustmentsCompiled) {
+      if (matcher(node, parent, index, false)) {
+        node = handler(node)
+      }
     }
+    return node
   }
-  return node
+  return adjuster
 }
 
-const doc = props.node ? props.node : parseHtml(props.html, { adjuster })
-const node = xpath ? findNode(doc, xpath) : doc
+const { props } = Astro
+const { debug, replacers, slotHandler } = props
+const node = await getNodeFromProps(props)
 
 const nextDebug = debug ? debug - 1 : 0
 ---

@@ -4,6 +4,9 @@ import External from './external.astro'
 import type { SlotHandler, Replacements } from './astro.ts'
 
 interface Props {
+  site?: string,
+  page?: string,
+  url?: string,
   html?: string,
   debug?: number,
   xpath?: string,