[vte/wip/egmont/bidi: 6/10] widget, bidi: Denote the direction in the I-beam cursor

[Egmont Koblinger <egmontkob src gnome org>]

commit 4ed58912adc7df1ccc6a3d1deb4ee80029bd7e54
Author: Egmont Koblinger <egmont gmail com>
Date:   Sat Jun 1 15:55:58 2019 +0200

    widget,bidi: Denote the direction in the I-beam cursor
    
    Show the direction of the character underneath if the paragraph contains
    a character of foreign direction. Currently for I-beam cursor shape only.

 src/vte.cc | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/src/vte.cc b/src/vte.cc
index a0f65081..c70cb380 100644
--- a/src/vte.cc
+++ b/src/vte.cc
@@ -9510,6 +9510,15 @@ Terminal::paint_cursor()
                         _vte_draw_fill_rectangle(m_draw,
                                                  x, y + m_char_padding.top, stem_width, m_char_ascent + 
m_char_descent,
                                                  &bg, VTE_DRAW_OPAQUE);
+
+                        /* Show the direction of the current character if the paragraph contains a mixture
+                         * of directions. */
+                        if (focus && bidirow->has_foreign())
+                                _vte_draw_fill_rectangle(m_draw,
+                                                         bidirow->vis_is_rtl(vcol) ? x - stem_width : x + 
stem_width,
+                                                         y + m_char_padding.top,
+                                                         stem_width, stem_width,
+                                                         &bg, VTE_DRAW_OPAQUE);
                        break;
                 }