[gtksourceview] gutterlines: include quark for selected lines

[Christian Hergert <chergert src gnome org>]

commit e16702662cee38a7f7123f69bd31168e2c32b8c6
Author: Christian Hergert <chergert redhat com>
Date:   Wed Apr 27 17:07:26 2022 -0700

    gutterlines: include quark for selected lines
    
    This was missing from the implementation by accident it appears.

 gtksourceview/gtksourcegutterlines.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
---
diff --git a/gtksourceview/gtksourcegutterlines.c b/gtksourceview/gtksourcegutterlines.c
index 364eb41b..0194fc49 100644
--- a/gtksourceview/gtksourcegutterlines.c
+++ b/gtksourceview/gtksourcegutterlines.c
@@ -114,9 +114,12 @@ _gtk_source_gutter_lines_new (GtkTextView       *text_view,
        GtkTextBuffer *buffer;
        GtkTextMark *mark;
        GtkTextIter iter;
+       GtkTextIter sel_begin, sel_end;
        gboolean single_line;
        guint cursor_line;
        guint i;
+       int first_selected = -1;
+       int last_selected = -1;
 
        g_return_val_if_fail (GTK_IS_TEXT_VIEW (text_view), NULL);
        g_return_val_if_fail (begin != NULL, NULL);
@@ -128,6 +131,13 @@ _gtk_source_gutter_lines_new (GtkTextView       *text_view,
        g_return_val_if_fail (gtk_text_iter_get_buffer (begin) == buffer, NULL);
        g_return_val_if_fail (gtk_text_iter_get_buffer (end) == buffer, NULL);
 
+       if (gtk_text_buffer_get_selection_bounds (buffer, &sel_begin, &sel_end))
+       {
+               gtk_text_iter_order (&sel_begin, &sel_end);
+               first_selected = gtk_text_iter_get_line (&sel_begin);
+               last_selected = gtk_text_iter_get_line (&sel_end);
+       }
+
        if (gtk_text_iter_compare (begin, end) > 0)
        {
                const GtkTextIter *tmp = begin;
@@ -249,6 +259,11 @@ _gtk_source_gutter_lines_new (GtkTextView       *text_view,
                        quark_set_add (&info.classes, q_cursor_line);
                }
 
+               if G_UNLIKELY (i >= first_selected && i <= last_selected)
+               {
+                       quark_set_add (&info.classes, q_selected);
+               }
+
                g_array_append_val (lines->lines, info);
 
                if G_UNLIKELY (!gtk_text_iter_forward_line (&iter) &&