From 78fc19a490062f3693750fc04486cc4ff3a62d64 Mon Sep 17 00:00:00 2001
From: alexm <alexm@72102866-910b-0410-8b05-ffd578937521>
Date: Tue, 11 Feb 2003 15:39:49 +0000
Subject: [PATCH] (-processEditing): Make sure we always give a valid range and
 delta to the layout managers.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@15936 72102866-910b-0410-8b05-ffd578937521
---
 Source/NSTextStorage.m | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/Source/NSTextStorage.m b/Source/NSTextStorage.m
index d4333d2c0..1434e2528 100644
--- a/Source/NSTextStorage.m
+++ b/Source/NSTextStorage.m
@@ -186,6 +186,7 @@ static NSNotificationCenter *nc = nil;
 - (void) processEditing
 {
   NSRange	r;
+  int original_delta;
   int i;
   unsigned length;
 
@@ -201,6 +202,7 @@ static NSNotificationCenter *nc = nil;
 
   /* Very important: we save the current _editedRange */
   r = _editedRange;
+  original_delta = _editedDelta;
   length = [self length];
   // Multiple adds at the end might give a too long result
   if (NSMaxRange(r) > length)
@@ -221,6 +223,31 @@ static NSNotificationCenter *nc = nil;
                     object: self];
   _editCount--;
 
+  /*
+  The attribute fixes might have added or removed characters. We must make
+  sure that range and delta we give to the layout managers is valid.
+  */
+  if (original_delta != _editedDelta)
+    {
+      if (_editedDelta - original_delta > 0)
+	{
+	  r.length += _editedDelta - original_delta;
+	}
+      else
+	{
+	  if (original_delta - _editedDelta > r.length)
+	    {
+	      r.length = 0;
+	      if (r.location > [self length])
+		r.location = [self length];
+	    }
+	  else
+	    {
+	      r.length += _editedDelta - original_delta;
+	    }
+	}
+    }
+
   /*
    * Calls textStorage:edited:range:changeInLength:invalidatedRange: for
    * every layoutManager.