[evolution/gnome-43] I#2014 - Calendar: Periodically refresh Marcus Bains line

[Milan Crha <mcrha src gnome org>]

commit 3fd76657a02ae96b4c989e5046542006b374d10e
Author: Milan Crha <mcrha redhat com>
Date:   Fri Sep 16 09:02:23 2022 +0200

    I#2014 - Calendar: Periodically refresh Marcus Bains line
    
    Closes https://gitlab.gnome.org/GNOME/evolution/-/issues/2014

 src/calendar/gui/e-day-view.c | 58 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
---
diff --git a/src/calendar/gui/e-day-view.c b/src/calendar/gui/e-day-view.c
index 3db9c16d6a..7e00ad2aa6 100644
--- a/src/calendar/gui/e-day-view.c
+++ b/src/calendar/gui/e-day-view.c
@@ -163,6 +163,8 @@ struct _EDayViewPrivate {
        /* Whether we show the Marcus Bains Line in the main
         * canvas and time canvas, and the colors for each. */
        gboolean marcus_bains_show_line;
+       gboolean marcus_bains_fix_timeout;
+       gint marcus_bains_update_id;
        gchar *marcus_bains_day_view_color;
        gchar *marcus_bains_time_bar_color;
 
@@ -501,6 +503,45 @@ enum {
 
 G_DEFINE_TYPE (EDayView, e_day_view, E_TYPE_CALENDAR_VIEW)
 
+static gboolean
+day_view_refresh_marcus_bains_line (gpointer user_data)
+{
+       EDayView *day_view = user_data;
+       ICalTime *now;
+       gint hh, mm, seconds = 0;
+
+       if (!day_view->priv->marcus_bains_show_line ||
+           !E_CALENDAR_VIEW (day_view)->in_focus) {
+               if (day_view->priv->marcus_bains_update_id) {
+                       g_source_remove (day_view->priv->marcus_bains_update_id);
+                       day_view->priv->marcus_bains_update_id = 0;
+                       day_view->priv->marcus_bains_fix_timeout = FALSE;
+               }
+               return FALSE;
+       }
+
+       e_day_view_marcus_bains_update (day_view);
+
+       now = i_cal_time_new_current_with_zone (e_cal_model_get_timezone (day_view->priv->model));
+       i_cal_time_get_time (now, &hh, &mm, &seconds);
+       g_clear_object (&now);
+
+       if (seconds > 1) {
+               if (day_view->priv->marcus_bains_update_id)
+                       g_source_remove (day_view->priv->marcus_bains_update_id);
+
+               day_view->priv->marcus_bains_fix_timeout = TRUE;
+               day_view->priv->marcus_bains_update_id = g_timeout_add_seconds (60 - seconds, 
day_view_refresh_marcus_bains_line, day_view);
+       } else if (day_view->priv->marcus_bains_fix_timeout || !day_view->priv->marcus_bains_update_id) {
+               day_view->priv->marcus_bains_fix_timeout = FALSE;
+               day_view->priv->marcus_bains_update_id = g_timeout_add_seconds (60, 
day_view_refresh_marcus_bains_line, day_view);
+       } else {
+               return TRUE;
+       }
+
+       return FALSE;
+}
+
 static void
 e_day_view_set_popup_event (EDayView *day_view,
                            gint day,
@@ -994,6 +1035,11 @@ day_view_dispose (GObject *object)
 
        day_view = E_DAY_VIEW (object);
 
+       if (day_view->priv->marcus_bains_update_id) {
+               g_source_remove (day_view->priv->marcus_bains_update_id);
+               day_view->priv->marcus_bains_update_id = 0;
+       }
+
        e_day_view_cancel_layout (day_view);
 
        e_day_view_stop_auto_scroll (day_view);
@@ -1756,6 +1802,9 @@ day_view_focus_in (GtkWidget *widget,
        gtk_widget_queue_draw (day_view->top_canvas);
        gtk_widget_queue_draw (day_view->main_canvas);
 
+       if (!day_view->priv->marcus_bains_update_id)
+               day_view_refresh_marcus_bains_line (day_view);
+
        return FALSE;
 }
 
@@ -1919,6 +1968,9 @@ day_view_set_selected_time_range (ECalendarView *cal_view,
 
                e_day_view_ensure_rows_visible (day_view, day_view->selection_start_row, 
day_view->selection_end_row);
        }
+
+       if (!day_view->priv->marcus_bains_update_id)
+               day_view_refresh_marcus_bains_line (day_view);
 }
 
 /* Gets the visible time range. Returns FALSE if no time range has been set. */
@@ -4045,6 +4097,9 @@ e_day_view_marcus_bains_set_show_line (EDayView *day_view,
 
        e_day_view_marcus_bains_update (day_view);
 
+       if (!day_view->priv->marcus_bains_update_id)
+               day_view_refresh_marcus_bains_line (day_view);
+
        g_object_notify (G_OBJECT (day_view), "marcus-bains-show-line");
 }
 
@@ -5047,6 +5102,9 @@ e_day_view_update_query (EDayView *day_view)
                return;
        }
 
+       if (!day_view->priv->marcus_bains_update_id)
+               day_view_refresh_marcus_bains_line (day_view);
+
        day_view->requires_update = FALSE;
 
        e_day_view_stop_editing_event (day_view);