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[network-manager-netbook] Implement the "Sorry, we can't find any networks" message.

commit 7380feeb73be2abdfd21d96db3aae38a6d4ba510
Author: Tambet Ingo <tambet gmail com>
Date:   Mon Sep 7 13:53:01 2009 +0300

    Implement the "Sorry, we can't find any networks" message.

 po/POTFILES.in      |    1 +
 src/Makefile.am     |    2 +
 src/nmn-networks.c  |  113 +++++++++++++++++++++++++++++++++++++++++++++++++++
 src/nmn-text-item.c |  102 ++++++++++++++++++++++++++++++++++++++++++++++
 src/nmn-text-item.h |   44 ++++++++++++++++++++
 5 files changed, 262 insertions(+), 0 deletions(-)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 9a451a5..d42a2e2 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -1,6 +1,7 @@
 src/nmn-connection-details.c
 src/nbtk-gtk-light-switch.c
 src/nmn-network-item.c
+src/nmn-networks.c
 [type: gettext/glade]src/network-manager-netbook.ui
 src/nmn-mobile-providers.c
 src/nmn-new-connection.c
diff --git a/src/Makefile.am b/src/Makefile.am
index fd59c11..daa16be 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -54,6 +54,8 @@ network_manager_netbook_SOURCES = \
 	nmn-serial-item.h \
 	nmn-status-icon.c \
 	nmn-status-icon.h \
+	nmn-text-item.c \
+	nmn-text-item.h \
 	nmn-wifi-handler.c \
 	nmn-wifi-handler.h \
 	nmn-wifi-item.c \
diff --git a/src/nmn-networks.c b/src/nmn-networks.c
index c93b21d..5acbc1a 100644
--- a/src/nmn-networks.c
+++ b/src/nmn-networks.c
@@ -18,6 +18,7 @@
  */
 
 #include <string.h>
+#include <glib/gi18n.h>
 #include <NetworkManager.h>
 #include <nm-settings.h>
 #include <nm-device-ethernet.h>
@@ -31,6 +32,7 @@
 #include "nmn-ethernet-handler.h"
 #include "nmn-serial-handler.h"
 #include "nmn-wifi-handler.h"
+#include "nmn-text-item.h"
 
 #define DBUS_TYPE_G_ARRAY_OF_OBJECT_PATH (dbus_g_type_get_collection ("GPtrArray", DBUS_TYPE_G_OBJECT_PATH))
 
@@ -46,6 +48,7 @@ enum {
 #define GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), NMN_TYPE_NETWORKS, NmnNetworksPrivate))
 
 typedef struct {
+    GtkWidget *zero_items;
     NmnNMData *nm_data;
     GSList *handlers;
     gboolean populated;
@@ -63,6 +66,96 @@ nmn_networks_new (NmnNMData *nm_data)
                                      NULL));
 }
 
+static const char *
+get_punctuation (guint items_left)
+{
+    if (items_left > 1)
+        return ", ";
+    if (items_left == 1)
+        return _(" and ");
+
+    /* items_left == 0 */
+    return ".";
+}
+
+static char *
+build_no_networks_text (NmnNMData *data)
+{
+    GString *string;
+    gboolean wifi_enabled;
+    gboolean ethernet_enabled;
+    gboolean modem_enabled;
+    guint disabled_count;
+
+    string = g_string_new (_("Sorry, we can't find any networks."));
+    disabled_count = 0;
+
+    wifi_enabled = nmn_nm_data_wifi_get_active (data);
+    if (!wifi_enabled)
+        disabled_count++;
+
+    ethernet_enabled = nmn_nm_data_ethernet_get_active (data);
+    if (!ethernet_enabled)
+        disabled_count++;
+
+    modem_enabled = nmn_nm_data_modems_get_active (data);
+    if (!modem_enabled)
+        disabled_count++;
+
+    if (disabled_count > 0) {
+        g_string_append (string, _(" You could try turning on "));
+
+        if (!wifi_enabled) {
+            g_string_append (string, _("WiFi"));
+            g_string_append (string, get_punctuation (--disabled_count));
+        }
+
+        if (!ethernet_enabled) {
+            g_string_append (string, _("Wired"));
+            g_string_append (string, get_punctuation (--disabled_count));
+        }
+
+        if (!modem_enabled) {
+            g_string_append (string, _("3G"));
+            g_string_append (string, get_punctuation (--disabled_count));
+        }
+    }
+
+    return g_string_free (string, FALSE);
+}
+
+static void
+foobar_changed (NmnNMData *data,
+                gboolean active,
+                gpointer user_data)
+{
+    NmnNetworksPrivate *priv = GET_PRIVATE (user_data);
+
+    if (priv->zero_items) {
+        NmnItem *item = NMN_ITEM (priv->zero_items);
+        char *txt;
+
+        txt = build_no_networks_text (data);
+        nmn_item_set_name (item, txt);
+        g_free (txt);
+    }
+}
+
+static void
+add_no_networks_item (NmnNetworks *self)
+{
+    NmnNetworksPrivate *priv = GET_PRIVATE (self);
+    char *txt;
+
+    g_return_if_fail (priv->zero_items == NULL);
+
+    txt = build_no_networks_text (priv->nm_data);
+    priv->zero_items = nmn_text_item_new (txt);
+    g_free (txt);
+
+    nmn_list_add_item (NMN_LIST (self), NMN_ITEM (priv->zero_items));
+}
+
 static void
 find_ac_for_item (NmnNetworks *self, NmnNetworkItem *item)
 {
@@ -97,6 +190,7 @@ typedef struct {
     NMExportedConnection *exported;
     NMDevice *device;
     GSList *items_to_remove;
+    guint counter;
 } RemoveInfo;
 
 static void
@@ -105,6 +199,8 @@ remove_connections_cb (GtkWidget *widget, gpointer data)
     NmnNetworkItem *item = NMN_NETWORK_ITEM (widget);
     RemoveInfo *info = (RemoveInfo *) data;
 
+    info->counter++;
+
     if ((info->item && (NmnItem *) item == info->item) ||
         (info->exported && nmn_network_item_get_connection (item) == info->exported) ||
         (info->device && nmn_network_item_get_device (item) == info->device))
@@ -124,6 +220,7 @@ remove_connections (NmnNetworks *self,
     info.exported = connection;
     info.device = device;
     info.items_to_remove = NULL;
+    info.counter = 0;
 
     gtk_container_foreach (GTK_CONTAINER (self), remove_connections_cb, &info);
 
@@ -132,7 +229,11 @@ remove_connections (NmnNetworks *self,
         g_object_unref (info.items_to_remove->data);
 
         info.items_to_remove = g_slist_delete_link (info.items_to_remove, info.items_to_remove);
+        info.counter--;
     }
+
+    if (info.counter < 1)
+        add_no_networks_item (self);
 }
 
 static void
@@ -148,6 +249,12 @@ item_added (NmnDeviceHandler *handler,
             gpointer user_data)
 {
     NmnNetworks *self = NMN_NETWORKS (user_data);
+    NmnNetworksPrivate *priv = GET_PRIVATE (self);
+
+    if (priv->zero_items) {
+        gtk_container_remove (GTK_CONTAINER (self), priv->zero_items);
+        priv->zero_items = NULL;
+    }
 
     nmn_list_add_item (NMN_LIST (self), item);
     g_signal_connect (item, "remove-requested", G_CALLBACK (item_remove_requested), self);
@@ -276,6 +383,12 @@ constructor (GType type,
         return NULL;
     }
 
+    g_signal_connect (priv->nm_data, "ethernet-toggled", G_CALLBACK (foobar_changed), object);
+    g_signal_connect (priv->nm_data, "wifi-toggled", G_CALLBACK (foobar_changed), object);
+    g_signal_connect (priv->nm_data, "modems-toggled", G_CALLBACK (foobar_changed), object);
+
+    add_no_networks_item (NMN_NETWORKS (object));
+
     return object;
 }
 
diff --git a/src/nmn-text-item.c b/src/nmn-text-item.c
new file mode 100644
index 0000000..192e979
--- /dev/null
+++ b/src/nmn-text-item.c
@@ -0,0 +1,102 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+
+/* 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * (C) Copyright 2009 Novell, Inc.
+ */
+
+#include <glib/gi18n.h>
+#include "nmn-text-item.h"
+#include "nmn-item.h"
+
+static void item_init (NmnItem *item_class);
+
+G_DEFINE_TYPE_EXTENDED (NmnTextItem, nmn_text_item, GTK_TYPE_LABEL, 0,
+                        G_IMPLEMENT_INTERFACE (NMN_TYPE_ITEM, item_init))
+
+GtkWidget *
+nmn_text_item_new (const char *text)
+{
+    return GTK_WIDGET (g_object_new (NMN_TYPE_TEXT_ITEM,
+                                     NMN_ITEM_NAME, text,
+                                     NULL));
+}
+
+static void
+item_init (NmnItem *item_class)
+{
+}
+
+static void
+nmn_text_item_init (NmnTextItem *self)
+{
+    gtk_misc_set_alignment (GTK_MISC (self), 0.0, 0.5);
+    gtk_misc_set_padding (GTK_MISC (self), 20, 20);
+}
+
+static void
+set_property (GObject *object, guint prop_id,
+              const GValue *value, GParamSpec *pspec)
+{
+    char *s;
+
+    switch (prop_id) {
+    case NMN_ITEM_PROP_NAME:
+        /* FIXME: This does not belong here */
+        s = g_strdup_printf ("<big><b>%s</b></big>", g_value_get_string (value));
+        gtk_label_set_markup (GTK_LABEL (object), s);
+        g_free (s);
+        g_object_notify (object, NMN_ITEM_NAME);
+        break;
+    default:
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+        break;
+   }
+}
+
+static void
+get_property (GObject *object, guint prop_id,
+              GValue *value, GParamSpec *pspec)
+{
+    switch (prop_id) {
+    case NMN_ITEM_PROP_NAME:
+        g_value_set_string (value, gtk_label_get_text (GTK_LABEL (object)));
+        break;
+    case NMN_ITEM_PROP_PRIORITY:
+        g_value_set_uint (value, 0);
+        break;
+    default:
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+        break;
+   }
+}
+
+static void
+nmn_text_item_class_init (NmnTextItemClass *class)
+{
+    GObjectClass *object_class = G_OBJECT_CLASS (class);
+
+    object_class->set_property = set_property;
+    object_class->get_property = get_property;
+
+    /* properties */
+    g_object_class_override_property (object_class,
+                                      NMN_ITEM_PROP_NAME,
+                                      NMN_ITEM_NAME);
+
+    g_object_class_override_property (object_class,
+                                      NMN_ITEM_PROP_PRIORITY,
+                                      NMN_ITEM_PRIORITY);
+}
diff --git a/src/nmn-text-item.h b/src/nmn-text-item.h
new file mode 100644
index 0000000..b7e36e0
--- /dev/null
+++ b/src/nmn-text-item.h
@@ -0,0 +1,44 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+
+/* 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * (C) Copyright 2009 Novell, Inc.
+ */
+
+#ifndef NMN_TEXT_ITEM_H
+#define NMN_TEXT_ITEM_H
+
+#include <gtk/gtk.h>
+
+#define NMN_TYPE_TEXT_ITEM            (nmn_text_item_get_type ())
+#define NMN_TEXT_ITEM(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), NMN_TYPE_TEXT_ITEM, NmnTextItem))
+#define NMN_TEXT_ITEM_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), NMN_TYPE_TEXT_ITEM, NmnTextItemClass))
+#define NMN_IS_TEXT_ITEM(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), NMN_TYPE_TEXT_ITEM))
+#define NMN_IS_TEXT_ITEM_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((obj), NMN_TYPE_TEXT_ITEM))
+#define NMN_TEXT_ITEM_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), NMN_TYPE_TEXT_ITEM, NmnTextItemClass))
+
+typedef struct {
+    GtkLabel parent;
+} NmnTextItem;
+
+typedef struct {
+    GtkLabelClass parent;
+} NmnTextItemClass;
+
+GType nmn_text_item_get_type (void);
+
+GtkWidget *nmn_text_item_new (const char *text);
+
+#endif /* NMN_TEXT_ITEM_H */
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