2 files changed, 49 insertions, 0 deletions

diff --git a/www b/www
deleted file mode 160000
-Subproject 9ac3dff9ebea4675e5c478bcdcbc0fd547d1529
diff --git a/www/index.js b/www/index.js
new file mode 100644
index 0000000..2665873
--- /dev/null
+++ b/www/index.js
@@ -0,0 +1,49 @@
+import {SynNode, put_cst} from "cstea";
+import {EditorState, EditorView, basicSetup} from "@codemirror/basic-setup"
+import {rust} from "@codemirror/lang-rust"
+
+let cst = document.getElementById('cst');
+let view = new EditorView({
+  state: EditorState.create({
+    extensions: [
+      basicSetup,
+      rust(),
+      EditorView.updateListener.of((v) => {
+        if (v.docChanged) {
+          doRender()
+        }
+      })
+    ]
+  }),
+  parent: document.getElementById('source-code')
+})
+
+function render_cst(synRoot) {
+  cst.innerText += "\n" + synRoot.to_string();
+  if (!synRoot.is_token()) {
+    synRoot.children().forEach(node => {
+      render_cst(node);
+      return;
+    });
+  } else {
+    return;
+  }
+}
+
+function render_err(errorList) {
+  cst.innerText = "";
+  errorList.forEach(err => {
+    cst.innerText += "\n" + err.to_string();
+  });
+}
+
+function doRender() {
+  let sourceFile = view.state.doc.toString();;
+  cst.innerText = "";
+  try {
+    var synRoot = SynNode.from_str(sourceFile);
+    render_cst(synRoot);
+  } catch (synError) {
+    render_err(synError)
+  }
+}