[gtksourceview] Transform GtkSourceEngine into an interface

[Sébastien Wilmet <swilmet src gnome org>]

commit efbfbf1f33d50870abdc25fc2769e72709cf5ef0
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue Sep 10 17:16:01 2013 +0200

    Transform GtkSourceEngine into an interface
    
    The ContextEngine is the only implementation.

 gtksourceview/gtksourcecontextengine.c |   28 +++++++++++-----
 gtksourceview/gtksourcecontextengine.h |    4 +-
 gtksourceview/gtksourceengine.c        |   52 +++++++++++++------------------
 gtksourceview/gtksourceengine.h        |   21 ++++--------
 4 files changed, 50 insertions(+), 55 deletions(-)
---
diff --git a/gtksourceview/gtksourcecontextengine.c b/gtksourceview/gtksourcecontextengine.c
index 82fcdec..8e0472e 100644
--- a/gtksourceview/gtksourcecontextengine.c
+++ b/gtksourceview/gtksourcecontextengine.c
@@ -2404,7 +2404,14 @@ install_first_update (GtkSourceContextEngine *ce)
 
 /* GtkSourceContextEngine class ------------------------------------------- */
 
-G_DEFINE_TYPE_WITH_PRIVATE (GtkSourceContextEngine, _gtk_source_context_engine, GTK_SOURCE_TYPE_ENGINE)
+static void _gtk_source_engine_interface_init (GtkSourceEngineInterface *iface);
+
+G_DEFINE_TYPE_WITH_CODE (GtkSourceContextEngine,
+                        _gtk_source_context_engine,
+                        G_TYPE_OBJECT,
+                        G_ADD_PRIVATE (GtkSourceContextEngine)
+                        G_IMPLEMENT_INTERFACE (GTK_SOURCE_TYPE_ENGINE,
+                                               _gtk_source_engine_interface_init))
 
 static GQuark
 gtk_source_context_engine_error_quark (void)
@@ -2684,19 +2691,22 @@ gtk_source_context_engine_get_context_class_tag (GtkSourceEngine *engine,
 }
 
 static void
+_gtk_source_engine_interface_init (GtkSourceEngineInterface *iface)
+{
+       iface->attach_buffer = gtk_source_context_engine_attach_buffer;
+       iface->text_inserted = gtk_source_context_engine_text_inserted;
+       iface->text_deleted = gtk_source_context_engine_text_deleted;
+       iface->update_highlight = gtk_source_context_engine_update_highlight;
+       iface->set_style_scheme = gtk_source_context_engine_set_style_scheme;
+       iface->get_context_class_tag = gtk_source_context_engine_get_context_class_tag;
+}
+
+static void
 _gtk_source_context_engine_class_init (GtkSourceContextEngineClass *klass)
 {
        GObjectClass *object_class = G_OBJECT_CLASS (klass);
-       GtkSourceEngineClass *engine_class = GTK_SOURCE_ENGINE_CLASS (klass);
 
        object_class->finalize = gtk_source_context_engine_finalize;
-
-       engine_class->attach_buffer = gtk_source_context_engine_attach_buffer;
-       engine_class->text_inserted = gtk_source_context_engine_text_inserted;
-       engine_class->text_deleted = gtk_source_context_engine_text_deleted;
-       engine_class->update_highlight = gtk_source_context_engine_update_highlight;
-       engine_class->set_style_scheme = gtk_source_context_engine_set_style_scheme;
-       engine_class->get_context_class_tag = gtk_source_context_engine_get_context_class_tag;
 }
 
 static void
diff --git a/gtksourceview/gtksourcecontextengine.h b/gtksourceview/gtksourcecontextengine.h
index e0aa60a..b12a5ca 100644
--- a/gtksourceview/gtksourcecontextengine.h
+++ b/gtksourceview/gtksourcecontextengine.h
@@ -44,7 +44,7 @@ typedef struct _GtkSourceContextEnginePrivate GtkSourceContextEnginePrivate;
 
 struct _GtkSourceContextEngine
 {
-       GtkSourceEngine parent_instance;
+       GObject parent_instance;
 
        /*< private >*/
        GtkSourceContextEnginePrivate *priv;
@@ -52,7 +52,7 @@ struct _GtkSourceContextEngine
 
 struct _GtkSourceContextEngineClass
 {
-       GtkSourceEngineClass parent_class;
+       GObjectClass parent_class;
 };
 
 typedef enum {
diff --git a/gtksourceview/gtksourceengine.c b/gtksourceview/gtksourceengine.c
index 5e3f732..3e6fb4c 100644
--- a/gtksourceview/gtksourceengine.c
+++ b/gtksourceview/gtksourceengine.c
@@ -23,32 +23,24 @@
 #include <config.h>
 #endif
 
-#include "gtksourcebuffer.h"
 #include "gtksourceengine.h"
 #include "gtksourcestylescheme.h"
 
-G_DEFINE_TYPE (GtkSourceEngine, _gtk_source_engine, G_TYPE_OBJECT)
+G_DEFINE_INTERFACE (GtkSourceEngine, _gtk_source_engine, G_TYPE_OBJECT)
 
 static void
-_gtk_source_engine_class_init (GtkSourceEngineClass *klass)
-{
-       klass->attach_buffer = NULL;
-}
-
-
-static void
-_gtk_source_engine_init (G_GNUC_UNUSED GtkSourceEngine *engine)
+_gtk_source_engine_default_init (GtkSourceEngineInterface *interface)
 {
 }
 
 void
 _gtk_source_engine_attach_buffer (GtkSourceEngine *engine,
-                                GtkTextBuffer   *buffer)
+                                 GtkTextBuffer   *buffer)
 {
        g_return_if_fail (GTK_SOURCE_IS_ENGINE (engine));
-       g_return_if_fail (GTK_SOURCE_ENGINE_GET_CLASS (engine)->attach_buffer != NULL);
+       g_return_if_fail (GTK_SOURCE_ENGINE_GET_INTERFACE (engine)->attach_buffer != NULL);
 
-       GTK_SOURCE_ENGINE_GET_CLASS (engine)->attach_buffer (engine, buffer);
+       GTK_SOURCE_ENGINE_GET_INTERFACE (engine)->attach_buffer (engine, buffer);
 }
 
 void
@@ -57,11 +49,11 @@ _gtk_source_engine_text_inserted (GtkSourceEngine *engine,
                                  gint             end_offset)
 {
        g_return_if_fail (GTK_SOURCE_IS_ENGINE (engine));
-       g_return_if_fail (GTK_SOURCE_ENGINE_GET_CLASS (engine)->text_inserted != NULL);
+       g_return_if_fail (GTK_SOURCE_ENGINE_GET_INTERFACE (engine)->text_inserted != NULL);
 
-       GTK_SOURCE_ENGINE_GET_CLASS (engine)->text_inserted (engine,
-                                                            start_offset,
-                                                            end_offset);
+       GTK_SOURCE_ENGINE_GET_INTERFACE (engine)->text_inserted (engine,
+                                                                start_offset,
+                                                                end_offset);
 }
 
 void
@@ -70,11 +62,11 @@ _gtk_source_engine_text_deleted (GtkSourceEngine *engine,
                                 gint             length)
 {
        g_return_if_fail (GTK_SOURCE_IS_ENGINE (engine));
-       g_return_if_fail (GTK_SOURCE_ENGINE_GET_CLASS (engine)->text_deleted != NULL);
+       g_return_if_fail (GTK_SOURCE_ENGINE_GET_INTERFACE (engine)->text_deleted != NULL);
 
-       GTK_SOURCE_ENGINE_GET_CLASS (engine)->text_deleted (engine,
-                                                           offset,
-                                                           length);
+       GTK_SOURCE_ENGINE_GET_INTERFACE (engine)->text_deleted (engine,
+                                                               offset,
+                                                               length);
 }
 
 void
@@ -85,12 +77,12 @@ _gtk_source_engine_update_highlight (GtkSourceEngine   *engine,
 {
        g_return_if_fail (GTK_SOURCE_IS_ENGINE (engine));
        g_return_if_fail (start != NULL && end != NULL);
-       g_return_if_fail (GTK_SOURCE_ENGINE_GET_CLASS (engine)->update_highlight != NULL);
+       g_return_if_fail (GTK_SOURCE_ENGINE_GET_INTERFACE (engine)->update_highlight != NULL);
 
-       GTK_SOURCE_ENGINE_GET_CLASS (engine)->update_highlight (engine,
-                                                               start,
-                                                               end,
-                                                               synchronous);
+       GTK_SOURCE_ENGINE_GET_INTERFACE (engine)->update_highlight (engine,
+                                                                   start,
+                                                                   end,
+                                                                   synchronous);
 }
 
 void
@@ -99,9 +91,9 @@ _gtk_source_engine_set_style_scheme (GtkSourceEngine      *engine,
 {
        g_return_if_fail (GTK_SOURCE_IS_ENGINE (engine));
        g_return_if_fail (GTK_SOURCE_IS_STYLE_SCHEME (scheme) || scheme == NULL);
-       g_return_if_fail (GTK_SOURCE_ENGINE_GET_CLASS (engine)->set_style_scheme != NULL);
+       g_return_if_fail (GTK_SOURCE_ENGINE_GET_INTERFACE (engine)->set_style_scheme != NULL);
 
-       GTK_SOURCE_ENGINE_GET_CLASS (engine)->set_style_scheme (engine, scheme);
+       GTK_SOURCE_ENGINE_GET_INTERFACE (engine)->set_style_scheme (engine, scheme);
 }
 
 GtkTextTag *
@@ -111,6 +103,6 @@ _gtk_source_engine_get_context_class_tag (GtkSourceEngine *engine,
        g_return_val_if_fail (GTK_SOURCE_IS_ENGINE (engine), NULL);
        g_return_val_if_fail (context_class != NULL, NULL);
 
-       return GTK_SOURCE_ENGINE_GET_CLASS (engine)->get_context_class_tag (engine,
-                                                                           context_class);
+       return GTK_SOURCE_ENGINE_GET_INTERFACE (engine)->get_context_class_tag (engine,
+                                                                               context_class);
 }
diff --git a/gtksourceview/gtksourceengine.h b/gtksourceview/gtksourceengine.h
index 045a3f1..dc4c64d 100644
--- a/gtksourceview/gtksourceengine.h
+++ b/gtksourceview/gtksourceengine.h
@@ -28,23 +28,16 @@
 
 G_BEGIN_DECLS
 
-#define GTK_SOURCE_TYPE_ENGINE            (_gtk_source_engine_get_type ())
-#define GTK_SOURCE_ENGINE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_SOURCE_TYPE_ENGINE, 
GtkSourceEngine))
-#define GTK_SOURCE_ENGINE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_SOURCE_TYPE_ENGINE, 
GtkSourceEngineClass))
-#define GTK_SOURCE_IS_ENGINE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_SOURCE_TYPE_ENGINE))
-#define GTK_SOURCE_IS_ENGINE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_SOURCE_TYPE_ENGINE))
-#define GTK_SOURCE_ENGINE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_SOURCE_TYPE_ENGINE, 
GtkSourceEngineClass))
+#define GTK_SOURCE_TYPE_ENGINE               (_gtk_source_engine_get_type ())
+#define GTK_SOURCE_ENGINE(obj)               (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_SOURCE_TYPE_ENGINE, 
GtkSourceEngine))
+#define GTK_SOURCE_IS_ENGINE(obj)            (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_SOURCE_TYPE_ENGINE))
+#define GTK_SOURCE_ENGINE_GET_INTERFACE(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), GTK_SOURCE_TYPE_ENGINE, 
GtkSourceEngineInterface))
 
-typedef struct _GtkSourceEngineClass   GtkSourceEngineClass;
+typedef struct _GtkSourceEngineInterface GtkSourceEngineInterface;
 
-struct _GtkSourceEngine
+struct _GtkSourceEngineInterface
 {
-       GObject parent_instance;
-};
-
-struct _GtkSourceEngineClass
-{
-       GObjectClass parent_class;
+       GTypeInterface parent_interface;
 
        void     (* attach_buffer)    (GtkSourceEngine      *engine,
                                       GtkTextBuffer        *buffer);