Convert LdSymbol into an abstract class.

Created LdLuaSymbol, which subclasses LdSymbol.

CMakeLists.txt

@@ -91,7 +91,8 @@ set (logdiag_SOURCES
 	src/ld-library.c
 	src/ld-symbol-category.c
 	src/ld-symbol.c
-	src/ld-lua.c)
+	src/ld-lua.c
+	src/ld-lua-symbol.c)
 set (logdiag_HEADERS
 	${CMAKE_CURRENT_BINARY_DIR}/config.h
 	src/ld-marshal.h
@@ -101,7 +102,8 @@ set (logdiag_HEADERS
 	src/ld-library.h
 	src/ld-symbol-category.h
 	src/ld-symbol.h
-	src/ld-lua.h)
+	src/ld-lua.h
+	src/ld-lua-symbol.h)
 
 # Generate a configure file
 configure_file (${CMAKE_CURRENT_SOURCE_DIR}/config.h.in

src/ld-lua-symbol.c

@@ -0,0 +1,96 @@
+/*
+ * ld-lua-symbol.c
+ *
+ * This file is a part of logdiag.
+ * Copyright Přemysl Janouch 2010. All rights reserved.
+ *
+ * See the file LICENSE for licensing information.
+ *
+ */
+
+#include <gtk/gtk.h>
+
+#include "config.h"
+
+#include "ld-library.h"
+#include "ld-symbol.h"
+#include "ld-symbol-category.h"
+#include "ld-lua.h"
+#include "ld-lua-symbol.h"
+
+
+/**
+ * SECTION:ld-lua-symbol
+ * @short_description: A symbol.
+ * @see_also: #LdSymbol
+ *
+ * #LdLuaSymbol is an implementation of #LdSymbol.
+ */
+
+/*
+ * LdLuaSymbolPrivate:
+ * @lua: Parent Lua object.
+ */
+struct _LdLuaSymbolPrivate
+{
+	LdLua *lua;
+};
+
+G_DEFINE_TYPE (LdLuaSymbol, ld_lua_symbol, LD_TYPE_SYMBOL);
+
+static void ld_lua_symbol_finalize (GObject *gobject);
+
+
+static void
+ld_lua_symbol_class_init (LdLuaSymbolClass *klass)
+{
+	GObjectClass *object_class;
+
+	object_class = G_OBJECT_CLASS (klass);
+	object_class->finalize = ld_lua_symbol_finalize;
+
+	g_type_class_add_private (klass, sizeof (LdLuaSymbolPrivate));
+}
+
+static void
+ld_lua_symbol_init (LdLuaSymbol *self)
+{
+	self->priv = G_TYPE_INSTANCE_GET_PRIVATE
+		(self, LD_TYPE_LUA_SYMBOL, LdLuaSymbolPrivate);
+}
+
+static void
+ld_lua_symbol_finalize (GObject *gobject)
+{
+	LdLuaSymbol *self;
+
+	self = LD_LUA_SYMBOL (gobject);
+	g_object_unref (self->priv->lua);
+
+	/* Chain up to the parent class. */
+	G_OBJECT_CLASS (ld_lua_symbol_parent_class)->finalize (gobject);
+}
+
+
+/**
+ * ld_symbol_new:
+ * @library: A library object.
+ * @filename: The file from which the symbol will be loaded.
+ *
+ * Load a symbol from a file into the library.
+ */
+LdSymbol *
+ld_lua_symbol_new (LdSymbolCategory *parent, LdLua *lua)
+{
+	LdLuaSymbol *symbol;
+
+	symbol = g_object_new (LD_TYPE_LUA_SYMBOL, NULL);
+
+	/* TODO: Create a separate ld-symbol-private.h, include it in this file
+	 *       and then assign and ref the parent category here.
+	 */
+
+	symbol->priv->lua = lua;
+	g_object_ref (lua);
+}
+

src/ld-lua-symbol.h

@@ -0,0 +1,63 @@
+/*
+ * ld-lua-symbol.h
+ *
+ * This file is a part of logdiag.
+ * Copyright Přemysl Janouch 2010. All rights reserved.
+ *
+ * See the file LICENSE for licensing information.
+ *
+ */
+
+#ifndef __LD_LUA_SYMBOL_H__
+#define __LD_LUA_SYMBOL_H__
+
+G_BEGIN_DECLS
+
+
+#define LD_TYPE_LUA_SYMBOL (ld_lua_symbol_get_type ())
+#define LD_LUA_SYMBOL(obj) (G_TYPE_CHECK_INSTANCE_CAST \
+	((obj), LD_TYPE_LUA_SYMBOL, LdLuaSymbol))
+#define LD_LUA_SYMBOL_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST \
+	((klass), LD_TYPE_LUA_SYMBOL, LdLuaSymbolClass))
+#define LD_IS_LUA_SYMBOL(obj) (G_TYPE_CHECK_INSTANCE_TYPE \
+	((obj), LD_TYPE_LUA_SYMBOL))
+#define LD_IS_LUA_SYMBOL_CLASS(klass) (G_TYPE_CHECK_INSTANCE_TYPE \
+	((klass), LD_TYPE_LUA_SYMBOL))
+#define LD_LUA_SYMBOL_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS \
+	((obj), LD_LUA_SYMBOL, LdLuaSymbolClass))
+
+typedef struct _LdLuaSymbol LdLuaSymbol;
+typedef struct _LdLuaSymbolPrivate LdLuaSymbolPrivate;
+typedef struct _LdLuaSymbolClass LdLuaSymbolClass;
+
+
+/**
+ * LdLuaSymbol:
+ * @name: The name of this symbol.
+ */
+struct _LdLuaSymbol
+{
+/*< private >*/
+	LdSymbol parent_instance;
+	LdLuaSymbolPrivate *priv;
+};
+
+/**
+ * LdLuaSymbolClass:
+ * @parent_class: The parent class.
+ */
+struct _LdLuaSymbolClass
+{
+	LdSymbolClass parent_class;
+};
+
+
+GType ld_lua_symbol_get_type (void) G_GNUC_CONST;
+
+LdSymbol *ld_lua_symbol_new (LdSymbolCategory *parent, LdLua *lua);
+
+
+G_END_DECLS
+
+#endif /* ! __LD_LUA_SYMBOL_H__ */
+

src/ld-symbol.c

@@ -28,18 +28,17 @@
 
 /*
  * LdSymbolPrivate:
- * @library: The parent LdLibrary.
+ * @parent: The parent LdSymbolCategory. It is used to identify
- * The library contains the real function for rendering.
+ * the object within it's library.
  */
 struct _LdSymbolPrivate
 {
-	LdLibrary *library;
+	LdSymbolCategory *parent;
 };
 
-G_DEFINE_TYPE (LdSymbol, ld_symbol, G_TYPE_OBJECT);
+G_DEFINE_ABSTRACT_TYPE (LdSymbol, ld_symbol, G_TYPE_OBJECT);
 
-static void
+static void ld_symbol_finalize (GObject *gobject);
-ld_symbol_finalize (GObject *gobject);
 
 
 static void
@@ -57,7 +56,7 @@ static void
 ld_symbol_init (LdSymbol *self)
 {
 	self->priv = G_TYPE_INSTANCE_GET_PRIVATE
-		(self, LD_TYPE_SYMBOL_LIBRARY, LdSymbolPrivate);
+		(self, LD_TYPE_SYMBOL, LdSymbolPrivate);
 }
 
 static void
@@ -66,29 +65,12 @@ ld_symbol_finalize (GObject *gobject)
 	LdSymbol *self;
 
 	self = LD_SYMBOL (gobject);
-	g_object_unref (self->priv->library);
+	g_object_unref (self->priv->parent);
 
 	/* Chain up to the parent class. */
 	G_OBJECT_CLASS (ld_symbol_parent_class)->finalize (gobject);
 }
 
-/**
- * ld_symbol_new:
- * @library: A library object.
- * @filename: The file from which the symbol will be loaded.
- *
- * Load a symbol from a file into the library.
- */
-LdSymbol *ld_symbol_new (LdLibrary *library)
-{
-	LdSymbol *symbol;
-
-	symbol = g_object_new (LD_TYPE_SYMBOL, NULL);
-
-	symbol->priv->library = library;
-	g_object_ref (library);
-}
-
 /**
  * ld_symbol_build_identifier:
  * @self: A symbol object.
@@ -96,9 +78,10 @@ LdSymbol *ld_symbol_new (LdLibrary *library)
  * Build an identifier for the symbol.
  * The identifier is in the format "Category/Category/Symbol".
  */
-char *
+gchar *
 ld_symbol_build_identifier (LdSymbol *self)
 {
+	/* TODO: Implement. */
 	return NULL;
 }
 
@@ -106,12 +89,18 @@ ld_symbol_build_identifier (LdSymbol *self)
  * ld_symbol_draw:
  * @self: A symbol object.
  * @cr: A cairo surface to be drawn on.
- * @param: Parameters for the symbol in a table.
  *
  * Draw the symbol onto a Cairo surface.
  */
 void
-ld_symbol_draw (LdSymbol *self, cairo_t *cr, GHashTable *param)
+ld_symbol_draw (LdSymbol *self, cairo_t *cr)
 {
-	return;
+	LdSymbolClass *klass;
+
+	g_return_if_fail (LD_IS_SYMBOL (self));
+	g_return_if_fail (cr != NULL);
+
+	klass = LD_SYMBOL_GET_CLASS (self);
+	if (klass->draw)
+		klass->draw (self, cr);
 }

src/ld-symbol.h

@@ -45,19 +45,26 @@ struct _LdSymbol
 	gchar *name;
 };
 
+/**
+ * LdSymbolClass:
+ * @parent_class: The parent class.
+ * @draw: Draw the symbol on a Cairo surface.
+ */
 struct _LdSymbolClass
 {
 	GObjectClass parent_class;
+
+	void (*draw) (LdSymbol *self, cairo_t *cr);
 };
 
 
 GType ld_symbol_get_type (void) G_GNUC_CONST;
 
-LdSymbol *ld_symbol_new (LdLibrary *library);
 gchar *ld_symbol_build_identifier (LdSymbol *self);
-void ld_symbol_draw (LdSymbol *self, cairo_t *cr, GHashTable *param);
 
-/* TODO: An interface for symbol terminals. */
+void ld_symbol_draw (LdSymbol *self, cairo_t *cr);
+
+/* TODO: An interface for symbol terminals etc. */
 
 
 G_END_DECLS