fix(code): saving on change

packages/codemirror/src/index.ts

@@ -1,15 +1,45 @@
 import { defaultKeymap } from "@codemirror/commands";
-import { EditorView, keymap, lineNumbers, type EditorViewConfig } from "@codemirror/view";
+import { EditorView, keymap, lineNumbers, ViewUpdate, type EditorViewConfig } from "@codemirror/view";
+
+type ContentChangedListener = () => void;
+
+export interface EditorConfig extends EditorViewConfig {
+    onContentChanged?: ContentChangedListener;
+}
 
 export default class CodeMirror extends EditorView {
-    constructor(config: EditorViewConfig) {
+
+    private config: EditorConfig;
+
+    constructor(config: EditorConfig) {
+        let extensions = [
+            keymap.of(defaultKeymap),
+            lineNumbers()
+        ];
+
+        if (Array.isArray(config.extensions)) {
+            extensions = [...extensions, ...config.extensions];
+        }
+
+        if (config.onContentChanged) {
+            extensions.push(EditorView.updateListener.of((v) => this.#onDocumentUpdated(v)));
+        }
+
         super({
             ...config,
-            extensions: [
-                keymap.of(defaultKeymap),
-                lineNumbers()
-            ]
+            extensions
         });
+        this.config = config;
+    }
+
+    #onDocumentUpdated(v: ViewUpdate) {
+        if (v.docChanged) {
+            this.config.onContentChanged?.();
+        }
+    }
+
+    getText() {
+        return this.state.doc.toString();
     }
 
     setText(content: string) {