[gnome-builder] libidemm: add registermmtype class

[Christian Hergert <chergert src gnome org>]

commit d74f9134a21ca30ff664b7b931303942bf33af33
Author: Marcin Kolny <marcin kolny gmail com>
Date:   Wed Apr 6 21:36:21 2016 +0200

    libidemm: add registermmtype class

 libidemm/idemm.h                |    1 +
 libidemm/idemm/filelist.am      |    5 +-
 libidemm/idemm/registermmtype.h |   93 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 97 insertions(+), 2 deletions(-)
---
diff --git a/libidemm/idemm.h b/libidemm/idemm.h
index 7c36ee0..f2a7824 100644
--- a/libidemm/idemm.h
+++ b/libidemm/idemm.h
@@ -4,6 +4,7 @@
 #include <idemm/application.h>
 #include <idemm/applicationaddin.h>
 #include <idemm/recentprojects.h>
+#include <idemm/registermmtype.h>
 #include <libidemm/wrap_init.h>
 
 #endif
diff --git a/libidemm/idemm/filelist.am b/libidemm/idemm/filelist.am
index d4a17e3..0b59b50 100644
--- a/libidemm/idemm/filelist.am
+++ b/libidemm/idemm/filelist.am
@@ -2,6 +2,7 @@ files_built_cc = $(idemm_files_hg:.hg=.cc) wrap_init.cc
 files_built_h  = $(idemm_files_hg:.hg=.h)
 files_built_ph = $(patsubst %.hg,private/%_p.h,$(idemm_files_hg))
 files_extra_cc =
-files_extra_h  = \
-       wrap_init.h
+files_extra_h  =               \
+       wrap_init.h             \
+       registermmtype.h
 files_extra_ph =
diff --git a/libidemm/idemm/registermmtype.h b/libidemm/idemm/registermmtype.h
new file mode 100644
index 0000000..da682b6
--- /dev/null
+++ b/libidemm/idemm/registermmtype.h
@@ -0,0 +1,93 @@
+/* registermmtype.h
+ *
+ * Copyright (C) 2016 Marcin Kolny <marcin kolny gmail com>
+ *
+ * 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 3 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/>.
+ */
+
+#ifndef _IDE_REGISTERMMTYPE_H
+#define _IDE_REGISTERMMTYPE_H
+
+#include <glibmm/object.h>
+#include <glibmm/private/object_p.h>
+#include <glibmm/init.h>
+#include <glibmm/property.h>
+
+#include <initializer_list>
+
+namespace Ide {
+
+template<class DerivedCppType, class... Interfaces>
+static GType register_mm_type(const gchar * type_name)
+{
+  Glib::init();
+
+  struct GlibCppType
+  {
+    typename DerivedCppType::BaseObjectType parent;
+    DerivedCppType *self;
+
+    static void init(GlibCppType *instance, gpointer /* g_class */)
+    {
+      instance->self = new DerivedCppType(&instance->parent);
+    }
+
+    static void finalize(GObject *object)
+    {
+      (G_OBJECT_CLASS(g_type_class_peek_parent(G_OBJECT_GET_CLASS(object))))->finalize(object);
+    }
+  };
+
+  struct GlibCppTypeClass
+  {
+    static void init (GlibCppTypeClass * klass, gpointer data)
+    {
+      DerivedCppType::CppClassType::class_init_function(klass, data);
+       
+      GObjectClass *gobject_class = reinterpret_cast<GObjectClass*>(klass);
+      gobject_class->get_property = &Glib::custom_get_property_callback;
+      gobject_class->set_property = &Glib::custom_set_property_callback;
+      gobject_class->finalize =  &GlibCppType::finalize;
+    }
+  };
+
+  GType parent_type = DerivedCppType::get_base_type();
+  static volatile gsize gonce_data = 0;
+
+  if (g_once_init_enter (&gonce_data)) {
+    GTypeInfo info;
+
+    info.class_size = sizeof(typename DerivedCppType::BaseClassType);
+    info.base_init = nullptr;
+    info.base_finalize = nullptr;
+    info.class_init = (GClassInitFunc) &GlibCppTypeClass::init;
+    info.class_finalize = nullptr;
+    info.class_data = nullptr;
+    info.instance_size = sizeof(GlibCppType);
+    info.n_preallocs = 0;
+    info.instance_init = (GInstanceInitFunc) &GlibCppType::init;
+    info.value_table = nullptr;
+
+    GType _type = g_type_register_static(parent_type, type_name, &info, (GTypeFlags)0);
+    g_once_init_leave(&gonce_data, (gsize) _type);
+
+    std::initializer_list<int> { (Interfaces::add_interface(_type), 0)... }; 
+  }
+    
+  return (GType) gonce_data;
+}
+
+}
+ 
+#endif