From 102b5e03d41e76343deb4e70736a07aaec245508 Mon Sep 17 00:00:00 2001
From: tophf <tophf@gmx.com>
Date: Wed, 15 Nov 2017 02:50:53 +0300
Subject: [PATCH] superfast cm.isBlank() instead of !cm.getValue().trim()

---
 edit/codemirror-default.js | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/edit/codemirror-default.js b/edit/codemirror-default.js
index 5d38a293..e642ca3e 100644
--- a/edit/codemirror-default.js
+++ b/edit/codemirror-default.js
@@ -111,4 +111,16 @@
     this.setOption('mode', MODE[preprocessor] || 'css');
     CodeMirror.autoLoadMode(this, MODE[preprocessor] || 'css');
   });
+
+  CodeMirror.defineExtension('isBlank', function () {
+    // superfast checking as it runs only until the first non-blank line
+    let isBlank = true;
+    this.doc.eachLine(line => {
+      if (line.text && line.text.trim()) {
+        isBlank = false;
+        return true;
+      }
+    });
+    return isBlank;
+  });
 })();