From 67ba2e49c3f5020cfbc12fed247f8e8a73a8e219 Mon Sep 17 00:00:00 2001
From: daboe01 <daboe01@googlemail.com>
Date: Tue, 10 May 2016 22:27:21 +0200
Subject: [PATCH] workaround for FF crash in very large documents

---
 AppKit/CPTextView/CPTextView.j | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/AppKit/CPTextView/CPTextView.j b/AppKit/CPTextView/CPTextView.j
index 77403ef68..c581e5fda 100644
--- a/AppKit/CPTextView/CPTextView.j
+++ b/AppKit/CPTextView/CPTextView.j
@@ -623,14 +623,13 @@ var kDelegateRespondsTo_textShouldBeginEditing
     [_caret setVisibility:flag stop:NO];
 }
 
-// remove unnecessary call to CGContextClearRect from CPView implementation
 - (void)displayRectIgnoringOpacity:(CGRect)aRect inContext:(CPGraphicsContext)aGraphicsContext
 {    if ([self isHidden])
        return;
 
-   [self lockFocus];
+   // [self lockFocus];  // this line crashes FF for obscure reasons when displaying large documents (2k+ lines)
    [self drawRect:aRect];
-   [self unlockFocus];
+   // [self unlockFocus];
 }
 
 - (void)drawRect:(CGRect)aRect