[vte/wip/egmont/bidi: 49/97] fix display after rtl double wide char

[Egmont Koblinger <egmontkob src gnome org>]

commit 36c4653633bcfeef0582cf57ad092f7b2b4ca216
Author: Egmont Koblinger <egmont gmail com>
Date:   Tue Aug 28 00:12:46 2018 +0200

    fix display after rtl double wide char

 doc/bidi.txt | 8 ++++++++
 src/vte.cc   | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)
---
diff --git a/doc/bidi.txt b/doc/bidi.txt
index 51b3b6ff..eb8ff2a7 100644
--- a/doc/bidi.txt
+++ b/doc/bidi.txt
@@ -36,6 +36,10 @@ Boxes should all show up nicely.
 oi7 incididunt ut labore et dolore magna aliqua.
 Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor שָׁלוֹם incididunt ut 
labore et dolore magna aliqua.
 
+Double wide
+a＜z  n＞x
+a＜z  א＜ת
+
 Box
 ┏━┓    ╔═╗    ┌─┐    ╭─╮
 ┗━┛   a╚═╝b  א┘─└ב   ╰─╯
@@ -68,6 +72,10 @@ Boxes should all show up nicely.
                                 .incididunt ut labore et dolore magna aliqua oi7
 [3 SLorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor שָׁלוֹם incididunt 
ut labore et dolore magna aliqua.[0 S
 
+Double wide
+                                                                      a＜z  n＞x
+[3 Sא＜ת  a＜z[0 S
+
 Box[3 S
 ┓━┏    ╗═╔    ┐─┌    ╮─╭
 ┛━┗   a╚═╝b  א┘─└ב   ╯─╰[0 S
diff --git a/src/vte.cc b/src/vte.cc
index 0743e9e2..a398bcbb 100644
--- a/src/vte.cc
+++ b/src/vte.cc
@@ -8933,7 +8933,7 @@ Terminal::draw_rows(VteScreen *screen_,
                                 bg.blue  = 0xC000 + (bg.blue  - 0xC000) / 2;
                                 _vte_draw_fill_rectangle (
                                                 m_draw,
-                                                x + i * column_width,
+                                                i * column_width,
                                                 y + row_height / 8,
                                                 (j - i) * column_width,
                                                 row_height * 3 / 4,