[gtksourceview] gutterrendererlines: check for background highlight

[Christian Hergert <chergert src gnome org>]

commit 678decbaa12605142d3449c201311c7863282098
Author: Christian Hergert <chergert redhat com>
Date:   Wed Dec 1 12:13:26 2021 -0800

    gutterrendererlines: check for background highlight
    
    If highlight-current-line is set, then we also need to redraw the line
    renderer as it can effect the background.

 gtksourceview/gtksourcegutterrendererlines.c | 31 ++++++++++++++++------------
 1 file changed, 18 insertions(+), 13 deletions(-)
---
diff --git a/gtksourceview/gtksourcegutterrendererlines.c b/gtksourceview/gtksourcegutterrendererlines.c
index 55dc2712..c78a101f 100644
--- a/gtksourceview/gtksourcegutterrendererlines.c
+++ b/gtksourceview/gtksourcegutterrendererlines.c
@@ -29,6 +29,7 @@ struct _GtkSourceGutterRendererLines
        GtkSourceGutterRendererText parent_instance;
        gint num_line_digits;
        gint prev_line_num;
+       guint highlight_current_line : 1;
        guint cursor_visible : 1;
 };
 
@@ -102,7 +103,7 @@ static void
 on_buffer_cursor_moved (GtkSourceBuffer              *buffer,
                         GtkSourceGutterRendererLines *renderer)
 {
-       if (renderer->cursor_visible)
+       if (renderer->cursor_visible || renderer->highlight_current_line)
        {
                /* Redraw if the current-line needs updating */
                gtk_widget_queue_draw (GTK_WIDGET (renderer));
@@ -164,11 +165,12 @@ gtk_source_gutter_renderer_lines_css_changed (GtkWidget         *widget,
 }
 
 static void
-on_view_notify_cursor_visible (GtkTextView                  *view,
-                               GParamSpec                   *pspec,
-                               GtkSourceGutterRendererLines *renderer)
+on_view_notify (GtkSourceView                *view,
+                GParamSpec                   *pspec,
+                GtkSourceGutterRendererLines *renderer)
 {
-       renderer->cursor_visible = gtk_text_view_get_cursor_visible (view);
+       renderer->cursor_visible = gtk_text_view_get_cursor_visible (GTK_TEXT_VIEW (view));
+       renderer->highlight_current_line = gtk_source_view_get_highlight_current_line (view);
 }
 
 static void
@@ -179,9 +181,7 @@ gutter_renderer_change_view (GtkSourceGutterRenderer *renderer,
 
        if (old_view != NULL)
        {
-               g_signal_handlers_disconnect_by_func (old_view,
-                                                     on_view_notify_cursor_visible,
-                                                     renderer);
+               g_signal_handlers_disconnect_by_func (old_view, on_view_notify, renderer);
        }
 
        new_view = gtk_source_gutter_renderer_get_view (renderer);
@@ -189,12 +189,17 @@ gutter_renderer_change_view (GtkSourceGutterRenderer *renderer,
        if (new_view != NULL)
        {
                g_signal_connect_object (new_view,
-                                        "notify::cursor-visible",
-                                        G_CALLBACK (on_view_notify_cursor_visible),
-                                        renderer,
-                                        0);
+                                        "notify::cursor-visible",
+                                        G_CALLBACK (on_view_notify),
+                                        renderer,
+                                        0);
+               g_signal_connect_object (new_view,
+                                        "notify::highlight-current-line",
+                                        G_CALLBACK (on_view_notify),
+                                        renderer,
+                                        0);
 
-               GTK_SOURCE_GUTTER_RENDERER_LINES (renderer)->cursor_visible = 
gtk_text_view_get_cursor_visible (GTK_TEXT_VIEW (new_view));
+               on_view_notify (new_view, NULL, GTK_SOURCE_GUTTER_RENDERER_LINES (renderer));
        }
 
        GTK_SOURCE_GUTTER_RENDERER_CLASS (_gtk_source_gutter_renderer_lines_parent_class)->change_view 
(renderer, old_view);