From d353fabd696ec931cd434057d5c89259a71c33b1 Mon Sep 17 00:00:00 2001
From: Shadowfacts <me@shadowfacts.net>
Date: Mon, 6 Apr 2020 19:31:35 -0400
Subject: [PATCH] JavaScript Highlighter: batch attributed string updates to
 vastly improve performance

---
 MongoView/Synax Highlighting/JavaScriptHighlighter.swift | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/MongoView/Synax Highlighting/JavaScriptHighlighter.swift b/MongoView/Synax Highlighting/JavaScriptHighlighter.swift
index 5a7ff60..758163c 100644
--- a/MongoView/Synax Highlighting/JavaScriptHighlighter.swift	
+++ b/MongoView/Synax Highlighting/JavaScriptHighlighter.swift	
@@ -73,6 +73,7 @@ class JavaScriptHighlighter {
     }
     
     func highlight() {
+        attributed.beginEditing()
         let fullRange = NSRange(location: 0, length: attributed.length)
         attributed.setAttributes([
             .foregroundColor: NSColor.textColor,
@@ -83,6 +84,8 @@ class JavaScriptHighlighter {
         while let char = peek(), !expressionEnds.contains(char) {
             consumeExpression()
         }
+
+        attributed.endEditing()
     }
     
     private func emit(token: TokenType, range: NSRange) {