[gnome-flashback] screensaver: add GfPanel

[Alberts Muktupāvels <muktupavels src gnome org>]

commit a0c7c005a36bb6619c30b29008cc7b7708e950a5
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Tue Dec 10 21:59:04 2019 +0200

    screensaver: add GfPanel

 configure.ac                               |   1 +
 data/theme/common.css                      |  11 +++
 data/theme/fallback.css                    |  11 +++
 gnome-flashback/libscreensaver/Makefile.am |   3 +
 gnome-flashback/libscreensaver/gf-panel.c  | 153 +++++++++++++++++++++++++++++
 gnome-flashback/libscreensaver/gf-panel.h  |  32 ++++++
 6 files changed, 211 insertions(+)
---
diff --git a/configure.ac b/configure.ac
index 887f169..8acd621 100644
--- a/configure.ac
+++ b/configure.ac
@@ -229,6 +229,7 @@ PKG_CHECK_MODULES([SCREENCAST], [
 PKG_CHECK_MODULES([SCREENSAVER], [
   gio-unix-2.0 >= $GLIB_REQUIRED
   glib-2.0 >= $GLIB_REQUIRED
+  gnome-desktop-3.0 >= $LIBGNOME_DESKTOP_REQUIRED
   gtk+-3.0 >= $GTK_REQUIRED
 ])
 
diff --git a/data/theme/common.css b/data/theme/common.css
index e69de29..e3dcc36 100644
--- a/data/theme/common.css
+++ b/data/theme/common.css
@@ -0,0 +1,11 @@
+gf-screensaver-panel {
+  font-weight: bold;
+  padding: 4px 10px;
+  background: rgba (0, 0, 0, 0.8);
+  color: #cccccc;
+}
+
+gf-screensaver-panel image,
+gf-screensaver-panel label {
+  color: #cccccc;
+}
diff --git a/data/theme/fallback.css b/data/theme/fallback.css
index e69de29..d2fbda6 100644
--- a/data/theme/fallback.css
+++ b/data/theme/fallback.css
@@ -0,0 +1,11 @@
+gf-screensaver-panel {
+  font-weight: bold;
+  padding: 4px 10px;
+  background: #000000;
+  color: #cccccc;
+}
+
+gf-screensaver-panel image,
+gf-screensaver-panel label {
+  color: #cccccc;
+}
diff --git a/gnome-flashback/libscreensaver/Makefile.am b/gnome-flashback/libscreensaver/Makefile.am
index aacf5e5..596223f 100644
--- a/gnome-flashback/libscreensaver/Makefile.am
+++ b/gnome-flashback/libscreensaver/Makefile.am
@@ -7,6 +7,7 @@ noinst_LTLIBRARIES = \
 libscreensaver_la_CPPFLAGS = \
        -DG_LOG_DOMAIN=\"screensaver\" \
        -DG_LOG_USE_STRUCTURED=1 \
+       -DGNOME_DESKTOP_USE_UNSTABLE_API \
        -I$(top_builddir)/gnome-flashback/libscreensaver \
        $(NULL)
 
@@ -21,6 +22,8 @@ libscreensaver_la_SOURCES = \
        gf-info-bar.h \
        gf-listener.c \
        gf-listener.h \
+       gf-panel.c \
+       gf-panel.h \
        gf-prefs.c \
        gf-prefs.h \
        gf-screensaver.c \
diff --git a/gnome-flashback/libscreensaver/gf-panel.c b/gnome-flashback/libscreensaver/gf-panel.c
new file mode 100644
index 0000000..4fdaa8f
--- /dev/null
+++ b/gnome-flashback/libscreensaver/gf-panel.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2019 Alberts Muktupāvels
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+#include "gf-panel.h"
+
+#include <libgnome-desktop/gnome-wall-clock.h>
+
+struct _GfPanel
+{
+  GtkBox          parent;
+
+  GnomeWallClock *clock;
+
+  GtkWidget      *clock_label;
+  GtkWidget      *name_label;
+};
+
+G_DEFINE_TYPE (GfPanel, gf_panel, GTK_TYPE_BOX)
+
+static char *
+get_user_display_name (void)
+{
+  const char *name;
+  char *display_name;
+
+  name = g_get_real_name ();
+  if (name == NULL || name[0] == '\0' || g_strcmp0 (name, "Unknown") == 0)
+    name = g_get_user_name ();
+
+  display_name = NULL;
+  if (name != NULL)
+    display_name = g_locale_to_utf8 (name, -1, NULL, NULL, NULL);
+
+  return display_name;
+}
+
+static void
+update_name (GfPanel *self)
+{
+  char *name;
+
+  name = get_user_display_name ();
+  gtk_label_set_label (GTK_LABEL (self->name_label), name);
+  g_free (name);
+}
+
+static void
+update_clock (GfPanel *self)
+{
+  const char *string;
+
+  string = gnome_wall_clock_get_clock (self->clock);
+  gtk_label_set_label (GTK_LABEL (self->clock_label), string);
+}
+
+static void
+clock_changed_cb (GnomeWallClock *clock,
+                  GParamSpec     *pspec,
+                  GfPanel        *self)
+{
+  update_clock (self);
+}
+
+static void
+gf_panel_dispose (GObject *object)
+{
+  GfPanel *self;
+
+  self = GF_PANEL (object);
+
+  g_clear_object (&self->clock);
+
+  G_OBJECT_CLASS (gf_panel_parent_class)->dispose (object);
+}
+
+static void
+gf_panel_class_init (GfPanelClass *self_class)
+{
+  GObjectClass *object_class;
+  GtkWidgetClass *widget_class;
+
+  object_class = G_OBJECT_CLASS (self_class);
+  widget_class = GTK_WIDGET_CLASS (self_class);
+
+  object_class->dispose = gf_panel_dispose;
+
+  gtk_widget_class_set_css_name (widget_class, "gf-screensaver-panel");
+}
+
+static void
+gf_panel_init (GfPanel *self)
+{
+  GtkWidget *left_hbox;
+  GtkWidget *right_hbox;
+  GIcon *icon;
+  GtkWidget *image;
+
+  self->clock = gnome_wall_clock_new ();
+
+  g_signal_connect (self->clock, "notify::clock",
+                    G_CALLBACK (clock_changed_cb),
+                    self);
+
+  left_hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  gtk_box_pack_start (GTK_BOX (self), left_hbox, TRUE, TRUE, 0);
+  gtk_widget_show (left_hbox);
+
+  self->clock_label = gtk_label_new (NULL);
+  gtk_box_set_center_widget (GTK_BOX (self), self->clock_label);
+  gtk_widget_show (self->clock_label);
+
+  right_hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  gtk_box_pack_end (GTK_BOX (self), right_hbox, TRUE, TRUE, 0);
+  gtk_widget_show (right_hbox);
+
+  self->name_label = gtk_label_new (NULL);
+  gtk_box_pack_end (GTK_BOX (right_hbox), self->name_label, FALSE, FALSE, 0);
+  gtk_widget_show (self->name_label);
+
+  icon = g_themed_icon_new_with_default_fallbacks ("changes-prevent-symbolic");
+  image = gtk_image_new_from_gicon (icon, GTK_ICON_SIZE_MENU);
+  g_object_unref (icon);
+
+  gtk_box_pack_end (GTK_BOX (right_hbox), image, FALSE, FALSE, 0);
+  gtk_widget_show (image);
+
+  update_clock (self);
+  update_name (self);
+}
+
+GtkWidget *
+gf_panel_new (void)
+{
+  return g_object_new (GF_TYPE_PANEL,
+                       "orientation", GTK_ORIENTATION_HORIZONTAL,
+                       "spacing", 12,
+                       NULL);
+}
diff --git a/gnome-flashback/libscreensaver/gf-panel.h b/gnome-flashback/libscreensaver/gf-panel.h
new file mode 100644
index 0000000..d3336db
--- /dev/null
+++ b/gnome-flashback/libscreensaver/gf-panel.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2019 Alberts Muktupāvels
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GF_PANEL_H
+#define GF_PANEL_H
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+#define GF_TYPE_PANEL (gf_panel_get_type ())
+G_DECLARE_FINAL_TYPE (GfPanel, gf_panel, GF, PANEL, GtkBox)
+
+GtkWidget *gf_panel_new (void);
+
+G_END_DECLS
+
+#endif