[tepl] Tab: implement the TeplTabList interface

[Sébastien Wilmet <swilmet src gnome org>]

commit 0c6bd7cb217ad8548bfb8dcf53958c3701a6bd73
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat Jun 24 10:23:13 2017 +0200

    Tab: implement the TeplTabList interface

 tepl/tepl-tab.c |   36 +++++++++++++++++++++++++++++++++++-
 1 files changed, 35 insertions(+), 1 deletions(-)
---
diff --git a/tepl/tepl-tab.c b/tepl/tepl-tab.c
index 662dcc9..185a8de 100644
--- a/tepl/tepl-tab.c
+++ b/tepl/tepl-tab.c
@@ -21,6 +21,7 @@
 #include "tepl-view.h"
 #include "tepl-buffer.h"
 #include "tepl-info-bar.h"
+#include "tepl-tab-list.h"
 
 /**
  * SECTION:tab
@@ -40,6 +41,9 @@
  * The way that the #TeplView is packed into the #TeplTab is customizable with
  * the ::pack_view virtual function. Similarly, the way that #GtkInfoBar's are
  * added can be customized with ::pack_info_bar.
+ *
+ * #TeplTab implements the #TeplTabList interface, for a list of only one tab.
+ * It is useful for text editors that open each file in a separate window.
  */
 
 struct _TeplTabPrivate
@@ -56,7 +60,15 @@ enum
 
 static GParamSpec *properties[N_PROPERTIES];
 
-G_DEFINE_TYPE_WITH_PRIVATE (TeplTab, tepl_tab, GTK_TYPE_GRID)
+static void tepl_tab_list_interface_init (gpointer g_iface,
+                                         gpointer iface_data);
+
+G_DEFINE_TYPE_WITH_CODE (TeplTab,
+                        tepl_tab,
+                        GTK_TYPE_GRID,
+                        G_ADD_PRIVATE (TeplTab)
+                        G_IMPLEMENT_INTERFACE (TEPL_TYPE_TAB_LIST,
+                                               tepl_tab_list_interface_init))
 
 static GtkScrolledWindow *
 create_scrolled_window (void)
@@ -237,6 +249,28 @@ tepl_tab_class_init (TeplTabClass *klass)
        g_object_class_install_properties (object_class, N_PROPERTIES, properties);
 }
 
+static GList *
+tepl_tab_get_tabs (TeplTabList *tab_list)
+{
+       return g_list_append (NULL, TEPL_TAB (tab_list));
+}
+
+static TeplTab *
+tepl_tab_get_active_tab (TeplTabList *tab_list)
+{
+       return TEPL_TAB (tab_list);
+}
+
+static void
+tepl_tab_list_interface_init (gpointer g_iface,
+                             gpointer iface_data)
+{
+       TeplTabListInterface *interface = g_iface;
+
+       interface->get_tabs = tepl_tab_get_tabs;
+       interface->get_active_tab = tepl_tab_get_active_tab;
+}
+
 static void
 tepl_tab_init (TeplTab *tab)
 {