Convert to React app

3 files changed, 75 insertions, 12 deletions

diff --git a/language-web/src/main/js/components/XtextCodeMirror.jsx b/language-web/src/main/js/components/XtextCodeMirror.jsx
new file mode 100644
index 00000000..75a20daa
--- /dev/null
+++ b/language-web/src/main/js/components/XtextCodeMirror.jsx
@@ -0,0 +1,32 @@
+import React, { useCallback, useState } from 'react';
+import { Controlled as CodeMirror } from 'react-codemirror2';
+import 'mode-problem';
+import { createServices, removeServices } from 'xtext/xtext-codemirror';
+
+export default function XtextCodeMirror({ initialValue }) {
+  const [value, setValue] = useState(initialValue);
+
+  const codeMirrorOptions = {
+    mode: 'xtext/problem',
+    indentUnit: 2,
+  };
+
+  const xtextOptions = {
+    xtextLang: 'problem',
+    enableFormattingAction: true,
+  };
+
+  const onBeforeChange = useCallback((_editor, _data, newValue) => {
+    setValue(newValue);
+  }, [setValue]);
+
+  return (
+    <CodeMirror
+      value={value}
+      options={codeMirrorOptions}
+      editorDidMount={editor => createServices(editor, xtextOptions)}
+      editorWillUnmount={removeServices}
+      onBeforeChange={onBeforeChange}
+    />
+  );
+};
diff --git a/language-web/src/main/js/index.js b/language-web/src/main/js/index.js
deleted file mode 100644
index b4cd450e..00000000
--- a/language-web/src/main/js/index.js
+++ /dev/null
@@ -1,12 +0,0 @@
-import xtext from 'xtext/xtext-codemirror';
-import 'mode-problem';
-
-import '../css/index.scss';
-
-xtext.createEditor({
-  baseUrl: '/',
-  xtextLang: 'problem',
-  enableFormattingAction: true,
-  sendFullText: false,
-  indentUnit: 2,
-});
diff --git a/language-web/src/main/js/index.jsx b/language-web/src/main/js/index.jsx
new file mode 100644
index 00000000..48c0baeb
--- /dev/null
+++ b/language-web/src/main/js/index.jsx
@@ -0,0 +1,43 @@
+import React from 'react';
+import { render } from 'react-dom';
+
+import XtextCodeMirror from "./components/XtextCodeMirror";
+
+import '../css/index.scss';
+
+const initialValue = `class Family {
+  contains Person[] members
+}
+
+class Person {
+  Person[] children opposite parent
+  Person[0..1] parent opposite children
+  int age
+  TaxStatus taxStatus
+}
+
+enum TaxStatus {
+  child, student, adult, retired
+}
+
+% A child cannot have any dependents.
+error invalidTaxStatus(Person p) :-
+  taxStatus(p, child), children(p, _q).
+
+Family('family').
+members('family', anne).
+members('family', bob).
+members('family', ciri).
+children(anne, ciri).
+?children(bob, ciri).
+taxStatus(anne, adult).
+age(anne, 35).
+bobAge: 27.
+age(bob, bobAge).
+!age(ciri, bobAge).
+
+scope Family = 1, Person += 5..10.
+`;
+const app = <XtextCodeMirror initialValue={initialValue}/>;
+
+render(app, document.getElementById('app'));