Update

Author: Ecmel Ercan

package.json

@@ -46,6 +46,8 @@
   "dependencies": {
     "vscode-languageclient": "2.3.0",
     "vscode-languageserver": "2.2.1",
-    "vscode-css-languageservice": "1.0.4"
+    "vscode-languageserver-types": "1.0.1",
+    "vscode-css-languageservice": "1.0.4",
+    "htmlparser2": "3.9.1"
   }
 }

srv/server.ts

@@ -5,6 +5,8 @@
 import * as ls from 'vscode-languageserver';
 import * as css from 'vscode-css-languageservice';
 
+let html = require("htmlparser2");
+
 let conn = ls.createConnection(new ls.IPCMessageReader(process), new ls.IPCMessageWriter(process));
 let docs = new ls.TextDocuments();
 
@@ -19,7 +21,31 @@ conn.onInitialize((params): ls.InitializeResult => {
 });
 
 docs.onDidChangeContent((change) => {
+  let doc = change.document;
+
+  let found = false;
+  let parser = new html.Parser({
+    onopentag: function (name, attribs) {
+      if (name === "style") {
+        found = true;
+      }
+    },
+    ontext: function (text) {
+      if (found) {
+        let start = doc.positionAt(parser.startIndex);
+        let end = doc.positionAt(parser.endIndex + 1);
+        let range = ls.Range.create(start, end);
+        console.log(range);
+      }
+    },
+    onclosetag: function (tagname) {
+      if (tagname === "style") {
+        found = false;
+      }
+    }
+  }, { decodeEntities: true });
 
+  parser.parseComplete(change.document.getText());
 });
 
 conn.listen();