From 7b0b0587cd027aa207f9658c12cb69bfcd639135 Mon Sep 17 00:00:00 2001
From: Roy Qu <royqh1979@gmail.com>
Date: Tue, 7 May 2024 20:54:40 +0800
Subject: [PATCH] optimize the speed for editing big source file

---
 libs/qsynedit/qsynedit/qsynedit.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/libs/qsynedit/qsynedit/qsynedit.cpp b/libs/qsynedit/qsynedit/qsynedit.cpp
index 278de51b..8f2690c2 100644
--- a/libs/qsynedit/qsynedit/qsynedit.cpp
+++ b/libs/qsynedit/qsynedit/qsynedit.cpp
@@ -3293,10 +3293,15 @@ int QSynEdit::reparseLines(int startLine, int endLine)
         }
         mDocument->setSyntaxState(line,state);
         line++;
-    } while (line < endLine);
+    } while (line < mDocument->count());
+
+    //don't rescan folds if only currentLine is reparsed
+    if (line-startLine==1)
+        return line;
 
     if (mEditingCount>0)
         return line;
+
     if (useCodeFolding())
         rescanFolds();
     return line;