1 files changed, 242 insertions, 0 deletions
diff --git a/gnome-initial-setup/pages/language/gis-welcome-widget.c b/gnome-initial-setup/pages/language/gis-welcome-widget.c
new file mode 100644
index 0000000..4d58a37
--- /dev/null
+++ b/gnome-initial-setup/pages/language/gis-welcome-widget.c
@@ -0,0 +1,242 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * Copyright (C) 2013 Red Hat
+ *
+ * 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 2 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/>.
+ *
+ * Written by:
+ *     Jasper St. Pierre <jstpierre@mecheye.net>
+ */
+
+#include "config.h"
+#include "gis-welcome-widget.h"
+
+#include <errno.h>
+#include <locale.h>
+#include <glib/gi18n.h>
+
+#include "cc-common-language.h"
+
+struct _GisWelcomeWidgetPrivate
+{
+  AdwCarousel *carousel;
+  GHashTable *translation_widgets;  /* (element-type owned utf8 unowned GtkWidget) (owned) */
+
+  guint timeout_id;
+};
+typedef struct _GisWelcomeWidgetPrivate GisWelcomeWidgetPrivate;
+
+#define TIMEOUT 5
+
+G_DEFINE_TYPE_WITH_PRIVATE (GisWelcomeWidget, gis_welcome_widget, ADW_TYPE_BIN);
+
+static gboolean
+advance_stack (gpointer user_data)
+{
+  GisWelcomeWidget *widget = user_data;
+  GisWelcomeWidgetPrivate *priv = gis_welcome_widget_get_instance_private (widget);
+  GtkWidget *child;
+  unsigned int next_page;
+  unsigned int n_pages;
+  double current_page;
+
+  n_pages = adw_carousel_get_n_pages (priv->carousel);
+  if (n_pages == 0)
+    goto out;
+
+  current_page = ceil (adw_carousel_get_position (priv->carousel));
+  next_page = ((int) current_page + 1) % n_pages;
+
+  child = gtk_widget_get_first_child (GTK_WIDGET (priv->carousel));
+  while (next_page-- > 0)
+    child = gtk_widget_get_next_sibling (child);
+
+  adw_carousel_scroll_to (priv->carousel, child, TRUE);
+
+ out:
+  return G_SOURCE_CONTINUE;
+}
+
+static void
+gis_welcome_widget_start (GisWelcomeWidget *widget)
+{
+  GisWelcomeWidgetPrivate *priv = gis_welcome_widget_get_instance_private (widget);
+
+  if (priv->timeout_id > 0)
+    return;
+
+  priv->timeout_id = g_timeout_add_seconds (5, advance_stack, widget);
+}
+
+static void
+gis_welcome_widget_stop (GisWelcomeWidget *widget)
+{
+  GisWelcomeWidgetPrivate *priv = gis_welcome_widget_get_instance_private (widget);
+
+  if (priv->timeout_id == 0)
+    return;
+
+  g_source_remove (priv->timeout_id);
+  priv->timeout_id = 0;
+}
+
+static void
+gis_welcome_widget_map (GtkWidget *widget)
+{
+  GTK_WIDGET_CLASS (gis_welcome_widget_parent_class)->map (widget);
+  gis_welcome_widget_start (GIS_WELCOME_WIDGET (widget));
+}
+
+static void
+gis_welcome_widget_unmap (GtkWidget *widget)
+{
+  GTK_WIDGET_CLASS (gis_welcome_widget_parent_class)->unmap (widget);
+  gis_welcome_widget_stop (GIS_WELCOME_WIDGET (widget));
+}
+
+static const char *
+welcome (const char *locale_id)
+{
+  locale_t locale;
+  locale_t old_locale;
+  const char *welcome;
+
+  locale = newlocale (LC_MESSAGES_MASK, locale_id, (locale_t) 0);
+  if (locale == (locale_t) 0)
+    {
+      if (errno == ENOENT)
+        g_debug ("Failed to create locale %s: %s", locale_id, g_strerror (errno));
+      else
+        g_warning ("Failed to create locale %s: %s", locale_id, g_strerror (errno));
+
+      return "Welcome!";
+    }
+
+  old_locale = uselocale (locale);
+
+  /* Translators: This is meant to be a warm, engaging welcome message,
+   * like greeting somebody at the door. If the exclamation mark is not
+   * suitable for this in your language you may replace it.
+   */
+  welcome = _("Welcome!");
+
+  uselocale (old_locale);
+  freelocale (locale);
+
+  return welcome;
+}
+
+static GtkWidget *
+big_label (const char *text)
+{
+  GtkWidget *label = gtk_label_new (text);
+
+  gtk_style_context_add_class (gtk_widget_get_style_context (label), "title-1");
+
+  return label;
+}
+
+static void
+fill_carousel (GisWelcomeWidget *widget)
+{
+  GisWelcomeWidgetPrivate *priv = gis_welcome_widget_get_instance_private (widget);
+  g_autoptr(GHashTable) initial = cc_common_language_get_initial_languages ();
+  GHashTableIter iter;
+  gpointer key, value;
+  g_autoptr(GHashTable) added_translations = NULL;
+
+  added_translations = g_hash_table_new (g_str_hash, g_str_equal);
+
+  g_hash_table_iter_init (&iter, initial);
+  while (g_hash_table_iter_next (&iter, &key, &value))
+    {
+      const char *locale_id = key;
+      const char *text;
+      GtkWidget *label;
+
+      if (!cc_common_language_has_font (locale_id))
+        continue;
+
+      text = welcome (locale_id);
+      label = g_hash_table_lookup (added_translations, text);
+      if (label == NULL) {
+        label = big_label (text);
+        adw_carousel_append (priv->carousel, label);
+        g_hash_table_insert (added_translations, (gpointer) text, label);
+      }
+
+      g_hash_table_insert (priv->translation_widgets, g_strdup (locale_id), label);
+    }
+}
+
+static void
+gis_welcome_widget_constructed (GObject *object)
+{
+  G_OBJECT_CLASS (gis_welcome_widget_parent_class)->constructed (object);
+
+  fill_carousel (GIS_WELCOME_WIDGET (object));
+}
+
+static void
+gis_welcome_widget_dispose (GObject *object)
+{
+  GisWelcomeWidget *widget = GIS_WELCOME_WIDGET (object);
+  GisWelcomeWidgetPrivate *priv = gis_welcome_widget_get_instance_private (widget);
+
+  g_clear_pointer (&priv->translation_widgets, g_hash_table_unref);
+
+  G_OBJECT_CLASS (gis_welcome_widget_parent_class)->dispose (object);
+}
+
+static void
+gis_welcome_widget_class_init (GisWelcomeWidgetClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+  gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/initial-setup/gis-welcome-widget.ui");
+
+  gtk_widget_class_bind_template_child_private (widget_class, GisWelcomeWidget, carousel);
+
+  object_class->constructed = gis_welcome_widget_constructed;
+  object_class->dispose = gis_welcome_widget_dispose;
+  widget_class->map = gis_welcome_widget_map;
+  widget_class->unmap = gis_welcome_widget_unmap;
+}
+
+static void
+gis_welcome_widget_init (GisWelcomeWidget *widget)
+{
+  GisWelcomeWidgetPrivate *priv = gis_welcome_widget_get_instance_private (widget);
+
+  priv->translation_widgets = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
+
+  gtk_widget_init_template (GTK_WIDGET (widget));
+}
+
+void
+gis_welcome_widget_show_locale (GisWelcomeWidget *widget,
+                                const char       *locale_id)
+{
+  GisWelcomeWidgetPrivate *priv = gis_welcome_widget_get_instance_private (widget);
+  GtkWidget *label;
+
+  /* Restart the widget to reset the timer. */
+  gis_welcome_widget_stop (widget);
+  gis_welcome_widget_start (widget);
+
+  label = g_hash_table_lookup (priv->translation_widgets, locale_id);
+  if (label)
+    adw_carousel_scroll_to (priv->carousel, label, FALSE);
+}