From aa0929298bf85b9357edf8af239d715a18ab5ce8 Mon Sep 17 00:00:00 2001
From: Will McGugan <willmcgugan@gmail.com>
Date: Fri, 6 Jan 2023 14:14:48 +0000
Subject: [PATCH] fix issue splitting segments

---
 CHANGELOG.md          | 6 ++++++
 rich/segment.py       | 2 +-
 tests/test_segment.py | 5 +++++
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f3af54fd..ab3c436e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [13.0.1] - 2022-01-06
+
+### Fixed
+
+- Fixed issue with Segment.split_cells for mixed single and double cell widths
+
 ## [13.0.0] - 2022-12-30
 
 ### Fixed
diff --git a/rich/segment.py b/rich/segment.py
index 6c87a791..d489d137 100644
--- a/rich/segment.py
+++ b/rich/segment.py
@@ -119,7 +119,7 @@ class Segment(NamedTuple):
 
         cell_size = get_character_cell_size
 
-        pos = int((cut / cell_length) * len(text))
+        pos = int((cut / cell_length) * (len(text) - 1))
 
         before = text[:pos]
         cell_pos = cell_len(before)
diff --git a/tests/test_segment.py b/tests/test_segment.py
index 5c3bbc39..3db60b90 100644
--- a/tests/test_segment.py
+++ b/tests/test_segment.py
@@ -273,6 +273,11 @@ def test_divide_edge_2():
         ("💩X💩Y💩Z💩A💩", 4, (Segment("💩X "), Segment(" Y💩Z💩A💩"))),
         ("XYZABC", 4, (Segment("XYZA"), Segment("BC"))),
         ("XYZABC", 5, (Segment("XYZAB"), Segment("C"))),
+        (
+            "a1あ１１bcdaef",
+            9,
+            (Segment("a1あ１１b"), Segment("cdaef")),
+        ),
     ],
 )
 def test_split_cells_emoji(text, split, result):