[evolution] Calendar: Highlight today in the Year View

[Milan Crha <mcrha src gnome org>]

commit 6f6f8f5ddb2844273708096be64555da12fc6efd
Author: Milan Crha <mcrha redhat com>
Date:   Mon Mar 28 14:51:52 2022 +0200

    Calendar: Highlight today in the Year View

 src/calendar/gui/e-year-view.c | 120 +++++++++++++++++++++++++++++++++++++++++
 src/calendar/gui/e-year-view.h |   3 ++
 2 files changed, 123 insertions(+)
---
diff --git a/src/calendar/gui/e-year-view.c b/src/calendar/gui/e-year-view.c
index 99edb8738e..4d96177360 100644
--- a/src/calendar/gui/e-year-view.c
+++ b/src/calendar/gui/e-year-view.c
@@ -61,12 +61,19 @@ struct _EYearViewPrivate {
        guint current_day;
        guint current_month;
        guint current_year;
+
+       /* Track today */
+       gboolean highlight_today;
+       gboolean today_fix_timeout;
+       guint today_source_id;
+       guint today_date; /* YYYYMMDD - current highlighted day */
 };
 
 enum {
        PROP_0,
        PROP_PREVIEW_VISIBLE,
        PROP_USE_24HOUR_FORMAT,
+       PROP_HIGHLIGHT_TODAY,
        LAST_PROP,
        PROP_IS_EDITING /* override property as the last */
 };
@@ -514,6 +521,70 @@ year_view_update_tree_view (EYearView *self)
        gtk_tree_view_set_model (self->priv->tree_view, GTK_TREE_MODEL (self->priv->list_store));
 }
 
+static gboolean
+year_view_update_today (EYearView *self)
+{
+       if (self->priv->highlight_today) {
+               ICalTime *now;
+               gint year = 0, month = 0, day = 0, seconds = 0;
+               guint today;
+
+               now = i_cal_time_new_current_with_zone (e_cal_data_model_get_timezone 
(self->priv->data_model));
+
+               /* Inc two seconds in case the GSource is invoked just before midnight */
+               i_cal_time_adjust (now, 0, 0, 0, 2);
+               i_cal_time_get_date (now, &year, &month, &day);
+               i_cal_time_get_time (now, NULL, NULL, &seconds);
+
+               g_clear_object (&now);
+
+               today = (year * 10000) + (month * 100) + day;
+
+               if (today != self->priv->today_date) {
+                       if (self->priv->today_date) {
+                               e_month_widget_remove_day_css_class 
(self->priv->months[((self->priv->today_date / 100) % 100) - 1],
+                                       self->priv->today_date % 100, E_MONTH_WIDGET_CSS_CLASS_HIGHLIGHT);
+                       }
+
+                       self->priv->today_date = today;
+
+                       if (year == self->priv->current_year) {
+                               e_month_widget_add_day_css_class (self->priv->months[((self->priv->today_date 
/ 100) % 100) - 1],
+                                       self->priv->today_date % 100, E_MONTH_WIDGET_CSS_CLASS_HIGHLIGHT);
+                       }
+               }
+
+               if (seconds > 1) {
+                       if (self->priv->today_source_id)
+                               g_source_remove (self->priv->today_source_id);
+
+                       self->priv->today_fix_timeout = TRUE;
+                       self->priv->today_source_id = g_timeout_add_seconds (61 - seconds, (GSourceFunc) 
year_view_update_today, self);
+               } else if (self->priv->today_fix_timeout || !self->priv->today_source_id) {
+                       self->priv->today_fix_timeout = FALSE;
+                       self->priv->today_source_id = g_timeout_add_seconds (60, (GSourceFunc) 
year_view_update_today, self);
+               } else {
+                       return TRUE;
+               }
+       } else {
+               if (self->priv->today_source_id) {
+                       g_source_remove (self->priv->today_source_id);
+                       self->priv->today_source_id = 0;
+               }
+
+               if (self->priv->today_date) {
+                       e_month_widget_remove_day_css_class (self->priv->months[((self->priv->today_date / 
100) % 100) - 1],
+                               self->priv->today_date % 100, E_MONTH_WIDGET_CSS_CLASS_HIGHLIGHT);
+
+                       self->priv->today_date = 0;
+               }
+
+               self->priv->today_fix_timeout = FALSE;
+       }
+
+       return FALSE;
+}
+
 static void
 year_view_set_year (EYearView *self,
                    guint year,
@@ -565,10 +636,13 @@ year_view_set_year (EYearView *self,
                        e_month_widget_set_month (self->priv->months[ii], ii + 1, self->priv->current_year);
                }
 
+               self->priv->today_date = 0;
+
                e_month_widget_set_day_selected (self->priv->months[self->priv->current_month - 1], 
self->priv->current_day, TRUE);
 
                year_view_update_data_model (self);
                year_view_update_tree_view (self);
+               year_view_update_today (self);
        }
 }
 
@@ -1526,6 +1600,12 @@ year_view_set_property (GObject *object,
                                E_YEAR_VIEW (object),
                                g_value_get_boolean (value));
                        return;
+
+               case PROP_HIGHLIGHT_TODAY:
+                       e_year_view_set_highlight_today (
+                               E_YEAR_VIEW (object),
+                               g_value_get_boolean (value));
+                       return;
        }
 
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
@@ -1551,6 +1631,11 @@ year_view_get_property (GObject *object,
                        g_value_set_boolean (value,
                                e_year_view_get_use_24hour_format (E_YEAR_VIEW (object)));
                        return;
+
+               case PROP_HIGHLIGHT_TODAY:
+                       g_value_set_boolean (value,
+                               e_year_view_get_highlight_today (E_YEAR_VIEW (object)));
+                       return;
        }
 
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
@@ -1793,6 +1878,11 @@ year_view_dispose (GObject *object)
                self->priv->clearing_comps = FALSE;
        }
 
+       if (self->priv->today_source_id) {
+               g_source_remove (self->priv->today_source_id);
+               self->priv->today_source_id = 0;
+       }
+
        g_clear_object (&self->priv->registry);
        g_clear_object (&self->priv->list_store);
        g_clear_object (&self->priv->data_model);
@@ -1854,6 +1944,11 @@ e_year_view_class_init (EYearViewClass *klass)
                        FALSE,
                        G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_EXPLICIT_NOTIFY);
 
+       obj_props[PROP_HIGHLIGHT_TODAY] =
+               g_param_spec_boolean ("highlight-today", NULL, NULL,
+                       TRUE,
+                       G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_EXPLICIT_NOTIFY);
+
        g_object_class_install_properties (object_class, LAST_PROP, obj_props);
 }
 
@@ -1862,6 +1957,7 @@ e_year_view_init (EYearView *self)
 {
        self->priv = e_year_view_get_instance_private (self);
        self->priv->preview_visible = TRUE;
+       self->priv->highlight_today = TRUE;
        self->priv->current_day = 1;
        self->priv->current_month = 1;
        self->priv->current_year = 2000;
@@ -2012,3 +2108,27 @@ e_year_view_get_use_24hour_format (EYearView *self)
 
        return self->priv->use_24hour_format;
 }
+
+void
+e_year_view_set_highlight_today (EYearView *self,
+                                gboolean value)
+{
+       g_return_if_fail (E_IS_YEAR_VIEW (self));
+
+       if ((self->priv->highlight_today ? 1 : 0) == (value ? 1 : 0))
+               return;
+
+       self->priv->highlight_today = value;
+
+       year_view_update_today (self);
+
+       g_object_notify_by_pspec (G_OBJECT (self), obj_props[PROP_HIGHLIGHT_TODAY]);
+}
+
+gboolean
+e_year_view_get_highlight_today (EYearView *self)
+{
+       g_return_val_if_fail (E_IS_YEAR_VIEW (self), FALSE);
+
+       return self->priv->highlight_today;
+}
diff --git a/src/calendar/gui/e-year-view.h b/src/calendar/gui/e-year-view.h
index 896def3010..05fa66f35e 100644
--- a/src/calendar/gui/e-year-view.h
+++ b/src/calendar/gui/e-year-view.h
@@ -54,6 +54,9 @@ GtkOrientation        e_year_view_get_preview_orientation     (EYearView *self);
 void           e_year_view_set_use_24hour_format       (EYearView *self,
                                                         gboolean value);
 gboolean       e_year_view_get_use_24hour_format       (EYearView *self);
+void           e_year_view_set_highlight_today         (EYearView *self,
+                                                        gboolean value);
+gboolean       e_year_view_get_highlight_today         (EYearView *self);
 
 G_END_DECLS