[tepl] TabGroup: add the :active-buffer property

[Sébastien Wilmet <swilmet src gnome org>]

commit 906108a0ae99ccfcc3becb908de5c8b24fbf0266
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri Jul 21 05:38:35 2017 +0200

    TabGroup: add the :active-buffer property

 tepl/tepl-application-window.c |   20 ++++++++++++++
 tepl/tepl-notebook.c           |   54 +++++++++++++++++++++++++++++++++++++--
 tepl/tepl-tab-group.c          |   16 ++++++++++++
 tepl/tepl-tab.c                |   20 ++++++++++++++
 4 files changed, 107 insertions(+), 3 deletions(-)
---
diff --git a/tepl/tepl-application-window.c b/tepl/tepl-application-window.c
index aa36406..8fe224b 100644
--- a/tepl/tepl-application-window.c
+++ b/tepl/tepl-application-window.c
@@ -68,6 +68,7 @@ enum
        PROP_APPLICATION_WINDOW,
        PROP_ACTIVE_TAB,
        PROP_ACTIVE_VIEW,
+       PROP_ACTIVE_BUFFER,
 };
 
 #define TEPL_APPLICATION_WINDOW_KEY "tepl-application-window-key"
@@ -104,6 +105,10 @@ tepl_application_window_get_property (GObject    *object,
                        g_value_set_object (value, tepl_tab_group_get_active_view (TEPL_TAB_GROUP 
(tepl_window)));
                        break;
 
+               case PROP_ACTIVE_BUFFER:
+                       g_value_set_object (value, tepl_tab_group_get_active_buffer (TEPL_TAB_GROUP 
(tepl_window)));
+                       break;
+
                default:
                        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
                        break;
@@ -184,6 +189,7 @@ tepl_application_window_class_init (TeplApplicationWindowClass *klass)
 
        g_object_class_override_property (object_class, PROP_ACTIVE_TAB, "active-tab");
        g_object_class_override_property (object_class, PROP_ACTIVE_VIEW, "active-view");
+       g_object_class_override_property (object_class, PROP_ACTIVE_BUFFER, "active-buffer");
 }
 
 static GList *
@@ -294,6 +300,14 @@ active_view_notify_cb (TeplTabGroup          *tab_group,
        g_object_notify (G_OBJECT (tepl_window), "active-view");
 }
 
+static void
+active_buffer_notify_cb (TeplTabGroup          *tab_group,
+                        GParamSpec            *pspec,
+                        TeplApplicationWindow *tepl_window)
+{
+       g_object_notify (G_OBJECT (tepl_window), "active-buffer");
+}
+
 /**
  * tepl_application_window_set_tab_group:
  * @tepl_window: a #TeplApplicationWindow.
@@ -335,6 +349,12 @@ tepl_application_window_set_tab_group (TeplApplicationWindow *tepl_window,
                                 G_CALLBACK (active_view_notify_cb),
                                 tepl_window,
                                 0);
+
+       g_signal_connect_object (tab_group,
+                                "notify::active-buffer",
+                                G_CALLBACK (active_buffer_notify_cb),
+                                tepl_window,
+                                0);
 }
 
 /* ex:set ts=8 noet: */
diff --git a/tepl/tepl-notebook.c b/tepl/tepl-notebook.c
index d7ab54a..85cbc8f 100644
--- a/tepl/tepl-notebook.c
+++ b/tepl/tepl-notebook.c
@@ -20,6 +20,7 @@
 #include "tepl-notebook.h"
 #include "tepl-tab-group.h"
 #include "tepl-tab.h"
+#include "tepl-signal-group.h"
 
 /**
  * SECTION:notebook
@@ -33,7 +34,7 @@
 
 struct _TeplNotebookPrivate
 {
-       gint something;
+       TeplSignalGroup *view_signal_group;
 };
 
 enum
@@ -41,6 +42,7 @@ enum
        PROP_0,
        PROP_ACTIVE_TAB,
        PROP_ACTIVE_VIEW,
+       PROP_ACTIVE_BUFFER,
 };
 
 static void tepl_tab_group_interface_init (gpointer g_iface,
@@ -71,6 +73,10 @@ tepl_notebook_get_property (GObject    *object,
                        g_value_set_object (value, tepl_tab_group_get_active_view (tab_group));
                        break;
 
+               case PROP_ACTIVE_BUFFER:
+                       g_value_set_object (value, tepl_tab_group_get_active_buffer (tab_group));
+                       break;
+
                default:
                        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
                        break;
@@ -92,6 +98,47 @@ tepl_notebook_set_property (GObject      *object,
 }
 
 static void
+tepl_notebook_dispose (GObject *object)
+{
+       TeplNotebook *notebook = TEPL_NOTEBOOK (object);
+
+       g_clear_pointer (&notebook->priv->view_signal_group,
+                        (GDestroyNotify) _tepl_signal_group_free);
+
+       G_OBJECT_CLASS (tepl_notebook_parent_class)->dispose (object);
+}
+
+static void
+buffer_notify_cb (GtkTextView  *view,
+                 GParamSpec   *pspec,
+                 TeplNotebook *notebook)
+{
+       g_object_notify (G_OBJECT (notebook), "active-buffer");
+}
+
+static void
+active_tab_changed (TeplNotebook *notebook)
+{
+       TeplView *view;
+
+       g_clear_pointer (&notebook->priv->view_signal_group,
+                        (GDestroyNotify) _tepl_signal_group_free);
+
+       view = tepl_tab_group_get_active_view (TEPL_TAB_GROUP (notebook));
+       notebook->priv->view_signal_group = _tepl_signal_group_new (G_OBJECT (view));
+
+       _tepl_signal_group_add_handler_id (notebook->priv->view_signal_group,
+                                          g_signal_connect (view,
+                                                            "notify::buffer",
+                                                            G_CALLBACK (buffer_notify_cb),
+                                                            notebook));
+
+       g_object_notify (G_OBJECT (notebook), "active-tab");
+       g_object_notify (G_OBJECT (notebook), "active-view");
+       g_object_notify (G_OBJECT (notebook), "active-buffer");
+}
+
+static void
 tepl_notebook_switch_page (GtkNotebook *notebook,
                           GtkWidget   *page,
                           guint        page_num)
@@ -107,8 +154,7 @@ tepl_notebook_switch_page (GtkNotebook *notebook,
         * active-tab property. Is it enough? Do we also need to connect to
         * other GtkNotebook signals?
         */
-       g_object_notify (G_OBJECT (notebook), "active-tab");
-       g_object_notify (G_OBJECT (notebook), "active-view");
+       active_tab_changed (TEPL_NOTEBOOK (notebook));
 }
 
 static void
@@ -119,11 +165,13 @@ tepl_notebook_class_init (TeplNotebookClass *klass)
 
        object_class->get_property = tepl_notebook_get_property;
        object_class->set_property = tepl_notebook_set_property;
+       object_class->dispose = tepl_notebook_dispose;
 
        notebook_class->switch_page = tepl_notebook_switch_page;
 
        g_object_class_override_property (object_class, PROP_ACTIVE_TAB, "active-tab");
        g_object_class_override_property (object_class, PROP_ACTIVE_VIEW, "active-view");
+       g_object_class_override_property (object_class, PROP_ACTIVE_BUFFER, "active-buffer");
 }
 
 static GList *
diff --git a/tepl/tepl-tab-group.c b/tepl/tepl-tab-group.c
index aadf9ee..d36126e 100644
--- a/tepl/tepl-tab-group.c
+++ b/tepl/tepl-tab-group.c
@@ -20,6 +20,7 @@
 #include "tepl-tab-group.h"
 #include "tepl-tab.h"
 #include "tepl-view.h"
+#include "tepl-buffer.h"
 
 /**
  * SECTION:tab-group
@@ -83,6 +84,21 @@ tepl_tab_group_default_init (TeplTabGroupInterface *interface)
                                                                  TEPL_TYPE_VIEW,
                                                                  G_PARAM_READABLE |
                                                                  G_PARAM_STATIC_STRINGS));
+
+       /**
+        * TeplTabGroup:active-buffer:
+        *
+        * The #TeplBuffer of the active tab.
+        *
+        * Since: 3.0
+        */
+       g_object_interface_install_property (interface,
+                                            g_param_spec_object ("active-buffer",
+                                                                 "Active Buffer",
+                                                                 "",
+                                                                 TEPL_TYPE_BUFFER,
+                                                                 G_PARAM_READABLE |
+                                                                 G_PARAM_STATIC_STRINGS));
 }
 
 /**
diff --git a/tepl/tepl-tab.c b/tepl/tepl-tab.c
index e4d78fa..9f9b0a1 100644
--- a/tepl/tepl-tab.c
+++ b/tepl/tepl-tab.c
@@ -57,6 +57,7 @@ enum
        PROP_VIEW,
        PROP_ACTIVE_TAB,
        PROP_ACTIVE_VIEW,
+       PROP_ACTIVE_BUFFER,
 };
 
 static void tepl_tab_group_interface_init (gpointer g_iface,
@@ -146,6 +147,14 @@ tepl_tab_pack_info_bar_default (TeplTab    *tab,
 }
 
 static void
+buffer_notify_cb (GtkTextView *view,
+                 GParamSpec  *pspec,
+                 TeplTab     *tab)
+{
+       g_object_notify (G_OBJECT (tab), "active-buffer");
+}
+
+static void
 set_view (TeplTab  *tab,
          TeplView *view)
 {
@@ -163,6 +172,12 @@ set_view (TeplTab  *tab,
 
        TEPL_TAB_GET_CLASS (tab)->pack_view (tab, view);
 
+       g_signal_connect_object (view,
+                                "notify::buffer",
+                                G_CALLBACK (buffer_notify_cb),
+                                tab,
+                                0);
+
        g_object_notify (G_OBJECT (tab), "view");
 }
 
@@ -188,6 +203,10 @@ tepl_tab_get_property (GObject    *object,
                        g_value_set_object (value, tepl_tab_group_get_active_view (TEPL_TAB_GROUP (tab)));
                        break;
 
+               case PROP_ACTIVE_BUFFER:
+                       g_value_set_object (value, tepl_tab_group_get_active_buffer (TEPL_TAB_GROUP (tab)));
+                       break;
+
                default:
                        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
                        break;
@@ -256,6 +275,7 @@ tepl_tab_class_init (TeplTabClass *klass)
 
        g_object_class_override_property (object_class, PROP_ACTIVE_TAB, "active-tab");
        g_object_class_override_property (object_class, PROP_ACTIVE_VIEW, "active-view");
+       g_object_class_override_property (object_class, PROP_ACTIVE_BUFFER, "active-buffer");
 }
 
 static GList *