[PATCH] describe new locale modifier @cjkwide for user guide
Thomas Wolff
towo@towo.net
Wed Mar 7 23:30:00 GMT 2018
-------------- next part --------------
From 725e49a16c7867512635e6ade0f1ff1e01f8e7c5 Mon Sep 17 00:00:00 2001
From: Thomas Wolff <towo@towo.net>
Date: Thu, 8 Mar 2018 00:29:25 +0100
Subject: [PATCH] describe new locale modifier @cjkwide for user guide
---
winsup/doc/setup-locale.xml | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/winsup/doc/setup-locale.xml b/winsup/doc/setup-locale.xml
index 29502a2..249c125 100644
--- a/winsup/doc/setup-locale.xml
+++ b/winsup/doc/setup-locale.xml
@@ -166,6 +166,19 @@ can be used to force wcwidth/wcswidth to return 1 for the ambiguous width
characters.
</para></listitem>
+<listitem><para>
+For the same class of "CJK Ambiguous Width" characters, it may be
+desirable to handle them as double-width even when a non-CJK language
+setting is selected. This supports e.g. certain graphic symbols used
+by "Powerline" and provided by "Powerline fonts". Some terminals have
+options to enforce this width handling (xterm -cjk_width,
+mintty -o Charwidth=ambig-wide, putty configuration) but that alone
+makes character rendering and locale information inconsistent for those
+characters. The locale modifier "@cjkwide" supports consistent locale
+response with this option; it forces wcwidth/wcswidth to return 2 for the
+ambiguous width characters.
+</para></listitem>
+
</itemizedlist>
</sect2>
--
2.16.2
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