From 0bdeec8ef02bcd497f6df77b2a00420c948c9438 Mon Sep 17 00:00:00 2001
From: oni-link <knil.ino@gmail.com>
Date: Mon, 24 Jun 2019 00:01:02 +0200
Subject: screen: Adjust buffer sizes for multiple sign columns #10314

* screen: Fix to draw signs with combining characters.
The buffer size for signs can be too small, because the upper length
limit of a sign can be 56 bytes. If combining characters are only two
bytes in size, this reduces to 32 bytes.

* screen: Adjust buffer size to maximal sign column count
---
 test/functional/ui/sign_spec.lua | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'test/functional/ui/sign_spec.lua')

diff --git a/test/functional/ui/sign_spec.lua b/test/functional/ui/sign_spec.lua
index 2b38a2a58d..68e675b8e5 100644
--- a/test/functional/ui/sign_spec.lua
+++ b/test/functional/ui/sign_spec.lua
@@ -31,6 +31,30 @@ describe('Signs', function()
   end)
 
   describe(':sign place', function()
+    it('allows signs with combining characters', function()
+      feed('ia<cr>b<cr><esc>')
+      command('sign define piet1 text=𐌢̀́̂̃̅̄𐌢̀́̂̃̅̄ texthl=Search')
+      command('sign define piet2 text=𠜎̀́̂̃̄̅ texthl=Search')
+      command('sign place 1 line=1 name=piet1 buffer=1')
+      command('sign place 2 line=2 name=piet2 buffer=1')
+      screen:expect([[
+        {1:𐌢̀́̂̃̅̄𐌢̀́̂̃̅̄}a                                                  |
+        {1:𠜎̀́̂̃̄̅}b                                                  |
+        {2:  }^                                                   |
+        {0:~                                                    }|
+        {0:~                                                    }|
+        {0:~                                                    }|
+        {0:~                                                    }|
+        {0:~                                                    }|
+        {0:~                                                    }|
+        {0:~                                                    }|
+        {0:~                                                    }|
+        {0:~                                                    }|
+        {0:~                                                    }|
+                                                             |
+      ]])
+    end)
+
     it('shadows previously placed signs', function()
       feed('ia<cr>b<cr>c<cr><esc>')
       command('sign define piet text=>> texthl=Search')
-- 
cgit