[gnome-builder] tree: add action gsignalaction

[Christian Hergert <chergert src gnome org>]

commit 0eab6bb832620591347274af62272e386fe8bf70
Author: Christian Hergert <christian hergert me>
Date:   Wed Apr 15 22:25:06 2015 -0700

    tree: add action gsignalaction
    
    This helper allows us to execute actions from keybindings.

 src/tree/gb-tree.c |   44 ++++++++++++++++++++++++++++++++++++++++++++
 src/tree/gb-tree.h |    8 ++++++--
 2 files changed, 50 insertions(+), 2 deletions(-)
---
diff --git a/src/tree/gb-tree.c b/src/tree/gb-tree.c
index 1a372ed..9550d74 100644
--- a/src/tree/gb-tree.c
+++ b/src/tree/gb-tree.c
@@ -23,6 +23,7 @@
 
 #include "gb-tree.h"
 #include "gb-tree-node.h"
+#include "gb-widget.h"
 
 struct _GbTreePrivate
 {
@@ -55,6 +56,7 @@ enum {
 };
 
 enum {
+  ACTION,
   POPULATE_POPUP,
   LAST_SIGNAL
 };
@@ -1117,6 +1119,33 @@ gb_tree_find_item (GbTree  *self,
   return lookup.result;
 }
 
+static void
+gb_tree_real_action (GbTree      *self,
+                     const gchar *prefix,
+                     const gchar *action_name,
+                     const gchar *param)
+{
+  GVariant *variant = NULL;
+
+  g_assert (GB_IS_TREE (self));
+
+  if (*param != 0)
+    {
+      g_autoptr(GError) error = NULL;
+
+      variant = g_variant_parse (NULL, param, NULL, NULL, &error);
+
+      if (variant == NULL)
+        {
+          g_warning ("can't parse keybinding parameters \"%s\": %s",
+                     param, error->message);
+          return;
+        }
+    }
+
+  gb_widget_activate_action (GTK_WIDGET (self), prefix, action_name, variant);
+}
+
 /**
  * gb_tree_finalize:
  * @object: (in): A #GbTree.
@@ -1228,6 +1257,8 @@ gb_tree_class_init (GbTreeClass *klass)
   widget_class = GTK_WIDGET_CLASS (klass);
   widget_class->popup_menu = gb_tree_popup_menu;
 
+  klass->action = gb_tree_real_action;
+
   gParamSpecs[PROP_ROOT] =
     g_param_spec_object ("root",
                          _ ("Root"),
@@ -1256,6 +1287,19 @@ gb_tree_class_init (GbTreeClass *klass)
   g_object_class_install_property (object_class, PROP_SHOW_ICONS,
                                    gParamSpecs [PROP_SHOW_ICONS]);
 
+  gSignals [ACTION] =
+    g_signal_new ("action",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+                  G_STRUCT_OFFSET (GbTreeClass, action),
+                  NULL, NULL,
+                  g_cclosure_marshal_generic,
+                  G_TYPE_NONE,
+                  3,
+                  G_TYPE_STRING,
+                  G_TYPE_STRING,
+                  G_TYPE_STRING);
+
   gSignals [POPULATE_POPUP] =
     g_signal_new ("populate-popup",
                   G_TYPE_FROM_CLASS (klass),
diff --git a/src/tree/gb-tree.h b/src/tree/gb-tree.h
index 33f5f58..fdf5622 100644
--- a/src/tree/gb-tree.h
+++ b/src/tree/gb-tree.h
@@ -52,8 +52,12 @@ struct _GbTreeClass
 {
        GtkTreeViewClass parent_class;
 
-  void (*populate_popup) (GbTree    *tree,
-                          GtkWidget *widget);
+  void (*action)         (GbTree      *tree,
+                          const gchar *action_group,
+                          const gchar *action_name,
+                          const gchar *param);
+  void (*populate_popup) (GbTree      *tree,
+                          GtkWidget   *widget);
 };
 
 void          gb_tree_add_builder    (GbTree        *tree,