[gtk/ngl-coloring-underlines: 1/4] gtk-demo: Make one text scroll benchmark harder

[Matthias Clasen <matthiasc src gnome org>]

commit f3102604669ef519570bc89a12df1bc63a7c982d
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Apr 8 23:09:14 2021 -0400

    gtk-demo: Make one text scroll benchmark harder
    
    Add underlines into the mix with the Emoji heavy
    text, to see if we can optimize lines.

 demos/gtk-demo/iconscroll.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)
---
diff --git a/demos/gtk-demo/iconscroll.c b/demos/gtk-demo/iconscroll.c
index 2eb9aa6e92..8212818516 100644
--- a/demos/gtk-demo/iconscroll.c
+++ b/demos/gtk-demo/iconscroll.c
@@ -116,20 +116,25 @@ populate_emoji_text (void)
   GtkWidget *textview;
   GtkTextBuffer *buffer;
   GString *s;
+  GtkTextIter iter;
 
-  s = g_string_sized_new (1000 * 30 * 4);
+  s = g_string_sized_new (500 * 30 * 4);
 
-  for (int i = 0; i < 1000; i++)
+  for (int i = 0; i < 500; i++)
     {
       if (i % 2)
-        g_string_append (s, "x");
+        g_string_append (s, "<span underline=\"single\" underline_color=\"red\">x</span>");
       for (int j = 0; j < 30; j++)
-        g_string_append (s, "💓x");
+        {
+          g_string_append (s, "💓");
+          g_string_append (s, "<span underline=\"single\" underline_color=\"red\">x</span>");
+        }
       g_string_append (s, "\n");
     }
 
   buffer = gtk_text_buffer_new (NULL);
-  gtk_text_buffer_set_text (buffer, s->str, s->len);
+  gtk_text_buffer_get_start_iter (buffer, &iter);
+  gtk_text_buffer_insert_markup (buffer, &iter, s->str, s->len);
 
   g_string_free (s, TRUE);