[vte] widget: Clean up invalidating in insert_char()

[Egmont Koblinger <egmontkob src gnome org>]

commit 4ae78d048df2354cc5f76e3e740baeccb60a5422
Author: Egmont Koblinger <egmont gmail com>
Date:   Fri May 31 22:51:02 2019 +0200

    widget: Clean up invalidating in insert_char()

 src/vte.cc | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)
---
diff --git a/src/vte.cc b/src/vte.cc
index bc432332..b0131352 100644
--- a/src/vte.cc
+++ b/src/vte.cc
@@ -2830,7 +2830,6 @@ Terminal::insert_char(gunichar c,
         };
 
         insert |= m_modes_ecma.IRM();
-       invalidate_now |= insert;
 
        /* If we've enabled the special drawing set, map the characters to
         * Unicode. */
@@ -2934,11 +2933,6 @@ Terminal::insert_char(gunichar c,
                        cell->c = c;
                }
 
-               /* Always invalidate since we put the mark on the *previous* cell
-                * and the higher level code doesn't know this. */
-                // FIXMEegmont could this be cleaned up now that we invalidate rows?
-                invalidate_row(row_num);
-
                goto done;
         } else {
                 m_last_graphic_character = c_unmapped;
@@ -2980,14 +2974,14 @@ Terminal::insert_char(gunichar c,
                cleanup_fragments(m_column_count, _vte_row_data_length (row));
        _vte_row_data_shrink (row, m_column_count);
 
-       /* Signal that this part of the window needs drawing. */
-       if (G_UNLIKELY (invalidate_now)) {
-                invalidate_row(m_screen->cursor.row);
-       }
-
         m_screen->cursor.col = col;
 
 done:
+        /* Signal that this part of the window needs drawing. */
+        if (G_UNLIKELY (invalidate_now)) {
+                invalidate_row(m_screen->cursor.row);
+        }
+
        /* We added text, so make a note of it. */
        m_text_inserted_flag = TRUE;