Add more properties to LdSymbol.

Also move the actual storage of symbol properties to implementations
of the abstract LdSymbol class. All the properties are read only.

src/ld-lua-symbol-private.h

@@ -19,10 +19,16 @@ G_BEGIN_DECLS
 /*
  * LdLuaSymbolPrivate:
  * @lua: Parent #LdLua object.
+ * @name: Name of this symbol.
+ * @human_name: Localized human name of this symbol.
+ * @area: Area of this symbol.
  */
 struct _LdLuaSymbolPrivate
 {
 	LdLua *lua;
+	gchar *name;
+	gchar *human_name;
+	LdSymbolArea area;
 };
 
 

src/ld-lua-symbol.c

@@ -34,6 +34,9 @@ G_DEFINE_TYPE (LdLuaSymbol, ld_lua_symbol, LD_TYPE_SYMBOL);
 
 static void ld_lua_symbol_finalize (GObject *gobject);
 
+static const gchar *ld_lua_symbol_get_name (LdSymbol *symbol);
+static const gchar *ld_lua_symbol_get_human_name (LdSymbol *symbol);
+static void ld_lua_symbol_get_area (LdSymbol *symbol, LdSymbolArea *area);
 static void ld_lua_symbol_draw (LdSymbol *symbol, cairo_t *cr);
 
 
@@ -45,6 +48,9 @@ ld_lua_symbol_class_init (LdLuaSymbolClass *klass)
 	object_class = G_OBJECT_CLASS (klass);
 	object_class->finalize = ld_lua_symbol_finalize;
 
+	klass->parent_class.get_name = ld_lua_symbol_get_name;
+	klass->parent_class.get_human_name = ld_lua_symbol_get_human_name;
+	klass->parent_class.get_area = ld_lua_symbol_get_area;
 	klass->parent_class.draw = ld_lua_symbol_draw;
 
 	g_type_class_add_private (klass, sizeof (LdLuaSymbolPrivate));
@@ -67,18 +73,49 @@ ld_lua_symbol_finalize (GObject *gobject)
 	ld_lua_private_unregister (self->priv->lua, self);
 	g_object_unref (self->priv->lua);
 
+	if (self->priv->name)
+		g_free (self->priv->name);
+	if (self->priv->human_name)
+		g_free (self->priv->human_name);
+
 	/* Chain up to the parent class. */
 	G_OBJECT_CLASS (ld_lua_symbol_parent_class)->finalize (gobject);
 }
 
 
+const gchar *
+ld_lua_symbol_get_name (LdSymbol *symbol)
+{
+	g_return_val_if_fail (LD_IS_LUA_SYMBOL (symbol), NULL);
+	return LD_LUA_SYMBOL (symbol)->priv->name;
+}
+
+const gchar *
+ld_lua_symbol_get_human_name (LdSymbol *symbol)
+{
+	g_return_val_if_fail (LD_IS_LUA_SYMBOL (symbol), NULL);
+	return LD_LUA_SYMBOL (symbol)->priv->human_name;
+}
+
+void
+ld_lua_symbol_get_area (LdSymbol *symbol, LdSymbolArea *area)
+{
+	LdLuaSymbol *self;
+
+	g_return_if_fail (LD_IS_LUA_SYMBOL (symbol));
+	g_return_if_fail (area != NULL);
+
+	self = LD_LUA_SYMBOL (symbol);
+	*area = self->priv->area;
+}
+
 static void
 ld_lua_symbol_draw (LdSymbol *symbol, cairo_t *cr)
 {
 	LdLuaSymbol *self;
 
+	g_return_if_fail (LD_IS_LUA_SYMBOL (symbol));
 	g_return_if_fail (cr != NULL);
-	g_return_if_fail (LD_IS_SYMBOL (symbol));
 
 	self = LD_LUA_SYMBOL (symbol);
 	ld_lua_private_draw (self->priv->lua, self, cr);

src/ld-lua.c

@@ -363,14 +363,6 @@ ld_lua_logdiag_register (lua_State *L)
 	lua_pop (L, 1);
 	g_return_val_if_fail (ud != NULL, 0);
 
-	/* TODO: Create a symbol using the given parameters:
-	 * 1. name
-	 * 2. names (table) -> use g_get_language_names ()
-	 * 3. area (table)
-	 * 4. terminals (table)
-	 * 5. render function
-	 */
-
 	/* Check and retrieve arguments. */
 	name = lua_tostring (L, 1);
 	if (!name)
@@ -378,12 +370,16 @@ ld_lua_logdiag_register (lua_State *L)
 	if (!lua_isfunction (L, 5))
 		luaL_error (L, "register: bad or missing argument #%d", 5);
 
-	/* Create a symbol object. */
+	/* TODO: Create a symbol using the given parameters:
+	 * 2. names (table) -> use g_get_language_names ()
+	 * 3. area (table)
+	 * 4. terminals (table)
+	 */
 	symbol = g_object_new (LD_TYPE_LUA_SYMBOL, NULL);
 	symbol->priv->lua = ud->self;
 	g_object_ref (ud->self);
 
-	ld_symbol_set_name (LD_SYMBOL (symbol), name);
+	symbol->priv->name = g_strdup (name);
 
 	/* Create an entry in the symbol table. */
 	lua_getfield (L, LUA_REGISTRYINDEX, LD_LUA_SYMBOLS_INDEX);

src/ld-symbol.c

@@ -26,21 +26,14 @@
  * drawn onto the #LdCanvas.
  */
 
-/*
- * LdSymbolPrivate:
- * @name: The name of this symbol.
- */
-struct _LdSymbolPrivate
-{
-	gchar *name;
-};
-
 G_DEFINE_ABSTRACT_TYPE (LdSymbol, ld_symbol, G_TYPE_OBJECT);
 
 enum
 {
 	PROP_0,
-	PROP_NAME
+	PROP_NAME,
+	PROP_HUMAN_NAME,
+	/* TODO: Property for the area. */
 };
 
 static void
@@ -63,7 +56,6 @@ ld_symbol_class_init (LdSymbolClass *klass)
 	object_class = G_OBJECT_CLASS (klass);
 	object_class->get_property = ld_symbol_get_property;
 	object_class->set_property = ld_symbol_set_property;
-	object_class->finalize = ld_symbol_finalize;
 
 /**
  * LdSymbol:name:
@@ -72,17 +64,23 @@ ld_symbol_class_init (LdSymbolClass *klass)
  */
 	pspec = g_param_spec_string ("name", "Name",
 		"The name of this symbol.",
-		"", G_PARAM_READWRITE);
+		"", G_PARAM_READABLE);
 	g_object_class_install_property (object_class, PROP_NAME, pspec);
 
-	g_type_class_add_private (klass, sizeof (LdSymbolPrivate));
+/**
+ * LdSymbol:human-name:
+ *
+ * The localized human name of this symbol.
+ */
+	pspec = g_param_spec_string ("human-name", "Human name",
+		"The localized human name of this symbol.",
+		"", G_PARAM_READABLE);
+	g_object_class_install_property (object_class, PROP_HUMAN_NAME, pspec);
 }
 
 static void
 ld_symbol_init (LdSymbol *self)
 {
-	self->priv = G_TYPE_INSTANCE_GET_PRIVATE
-		(self, LD_TYPE_SYMBOL, LdSymbolPrivate);
 }
 
 static void
@@ -97,6 +95,9 @@ ld_symbol_get_property (GObject *object, guint property_id,
 	case PROP_NAME:
 		g_value_set_string (value, ld_symbol_get_name (self));
 		break;
+	case PROP_HUMAN_NAME:
+		g_value_set_string (value, ld_symbol_get_human_name (self));
+		break;
 	default:
 		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
 	}
@@ -106,50 +107,9 @@ static void
 ld_symbol_set_property (GObject *object, guint property_id,
 	const GValue *value, GParamSpec *pspec)
 {
-	LdSymbol *self;
-
-	self = LD_SYMBOL (object);
-	switch (property_id)
-	{
-	case PROP_NAME:
-		ld_symbol_set_name (self, g_value_get_string (value));
-		break;
-	default:
 	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
-	}
 }
 
-static void
-ld_symbol_finalize (GObject *gobject)
-{
-	LdSymbol *self;
-
-	self = LD_SYMBOL (gobject);
-
-	if (self->priv->name)
-		g_free (self->priv->name);
-
-	/* Chain up to the parent class. */
-	G_OBJECT_CLASS (ld_symbol_parent_class)->finalize (gobject);
-}
-
-/**
- * ld_symbol_set_name:
- * @self: An #LdSymbol object.
- * @name: A new name for the symbol.
- *
- * Set the name of a symbol.
- */
-void
-ld_symbol_set_name (LdSymbol *self, const gchar *name)
-{
-	g_return_if_fail (LD_IS_SYMBOL (self));
-	g_return_if_fail (name != NULL);
-
-	if (self->priv->name)
-		g_free (self->priv->name);
-	self->priv->name = g_strdup (name);
-}
 
 /**
  * ld_symbol_get_name:
@@ -160,8 +120,51 @@ ld_symbol_set_name (LdSymbol *self, const gchar *name)
 const gchar *
 ld_symbol_get_name (LdSymbol *self)
 {
+	LdSymbolClass *klass;
+
 	g_return_if_fail (LD_IS_SYMBOL (self));
-	return self->priv->name;
+
+	klass = LD_SYMBOL_GET_CLASS (self);
+	g_return_val_if_fail (klass->get_name != NULL, NULL);
+	return klass->get_name (self);
+}
+
+/**
+ * ld_symbol_get_human_name:
+ * @self: An #LdSymbol object.
+ *
+ * Return value: The localised human name of the symbol.
+ */
+const gchar *
+ld_symbol_get_human_name (LdSymbol *self)
+{
+	LdSymbolClass *klass;
+
+	g_return_if_fail (LD_IS_SYMBOL (self));
+
+	klass = LD_SYMBOL_GET_CLASS (self);
+	g_return_val_if_fail (klass->get_human_name != NULL, NULL);
+	return klass->get_human_name (self);
+}
+
+/**
+ * ld_symbol_get_area:
+ * @self: A symbol object.
+ * @area: Where the area of the symbol will be returned.
+ *
+ * Get the area of the symbol.
+ */
+void
+ld_symbol_get_area (LdSymbol *self, LdSymbolArea *area)
+{
+	LdSymbolClass *klass;
+
+	g_return_if_fail (LD_IS_SYMBOL (self));
+	g_return_if_fail (area != NULL);
+
+	klass = LD_SYMBOL_GET_CLASS (self);
+	g_return_if_fail (klass->get_area != NULL);
+	klass->get_area (self, area);
 }
 
 /**
@@ -180,6 +183,6 @@ ld_symbol_draw (LdSymbol *self, cairo_t *cr)
 	g_return_if_fail (cr != NULL);
 
 	klass = LD_SYMBOL_GET_CLASS (self);
-	if (klass->draw)
+	g_return_if_fail (klass->draw != NULL);
 	klass->draw (self, cr);
 }

src/ld-symbol.h

@@ -30,6 +30,8 @@ typedef struct _LdSymbol LdSymbol;
 typedef struct _LdSymbolPrivate LdSymbolPrivate;
 typedef struct _LdSymbolClass LdSymbolClass;
 
+typedef struct _LdSymbolArea LdSymbolArea;
+
 
 /**
  * LdSymbol:
@@ -42,27 +44,51 @@ struct _LdSymbol
 	LdSymbolPrivate *priv;
 };
 
+/**
+ * LdSymbolArea:
+ * @x1: Left-top X coordinate.
+ * @y1: Left-top Y coordinate.
+ * @x2: Right-bottom X coordinate.
+ * @y2: Right-bottom Y coordinate.
+ *
+ * Defines the area of the symbol relative to the center of the symbol,
+ * which is at the (0, 0) coordinates.
+ */
+struct _LdSymbolArea
+{
+	gdouble x1, y1;
+	gdouble x2, y2;
+};
+
 /**
  * LdSymbolClass:
  * @parent_class: The parent class.
+ * @get_name: Get the name of the symbol.
+ * @get_human_name: Get the localized human name of the symbol.
+ * @get_area: Get the area of the symbol.
  * @draw: Draw the symbol on a Cairo surface.
  */
 struct _LdSymbolClass
 {
 	GObjectClass parent_class;
 
+	const gchar *(*get_name) (LdSymbol *self);
+	const gchar *(*get_human_name) (LdSymbol *self);
+	void (*get_area) (LdSymbol *self, LdSymbolArea *area);
 	void (*draw) (LdSymbol *self, cairo_t *cr);
 };
 
 
 GType ld_symbol_get_type (void) G_GNUC_CONST;
 
-void ld_symbol_set_name (LdSymbol *self, const gchar *name);
 const gchar *ld_symbol_get_name (LdSymbol *self);
-
+const gchar *ld_symbol_get_human_name (LdSymbol *self);
+void ld_symbol_get_area (LdSymbol *self, LdSymbolArea *area);
 void ld_symbol_draw (LdSymbol *self, cairo_t *cr);
 
-/* TODO: Interface for symbol terminals. */
+/* TODO: Interface for terminals.
+ *       Something like a list of gdouble pairs (-> a new structure).
+ */
 
 
 G_END_DECLS