Split ld-symbol-library.c.

Originally, there were three object classes defined in this file.
It would later become rather chaotic if left that way.

src/ld-symbol.c

@@ -0,0 +1,123 @@
+/*
+ * ld-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-symbol-library.h"
+#include "ld-symbol-category.h"
+#include "ld-symbol.h"
+
+
+/**
+ * SECTION:ld-symbol
+ * @short_description: A symbol.
+ * @see_also: #LdDocument, #LdCanvas
+ *
+ * #LdSymbol represents a symbol in the #LdDocument that is in turn
+ * drawn onto the #LdCanvas.
+ */
+
+/*
+ * LdSymbolPrivate:
+ * @library: The parent LdSymbolLibrary.
+ * The library contains the real function for rendering.
+ */
+struct _LdSymbolPrivate
+{
+	LdSymbolLibrary *library;
+};
+
+G_DEFINE_TYPE (LdSymbol, ld_symbol, G_TYPE_OBJECT);
+
+static void
+ld_symbol_finalize (GObject *gobject);
+
+
+static void
+ld_symbol_class_init (LdSymbolClass *klass)
+{
+	GObjectClass *object_class;
+
+	object_class = G_OBJECT_CLASS (klass);
+	object_class->finalize = ld_symbol_finalize;
+
+	g_type_class_add_private (klass, sizeof (LdSymbolPrivate));
+}
+
+static void
+ld_symbol_init (LdSymbol *self)
+{
+	self->priv = G_TYPE_INSTANCE_GET_PRIVATE
+		(self, LD_TYPE_SYMBOL_LIBRARY, LdSymbolPrivate);
+}
+
+static void
+ld_symbol_finalize (GObject *gobject)
+{
+	LdSymbol *self;
+
+	self = LD_SYMBOL (gobject);
+	g_object_unref (self->priv->library);
+
+	/* 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 (LdSymbolLibrary *library,
+	const gchar *filename)
+{
+	LdSymbol *symbol;
+
+	symbol = g_object_new (LD_TYPE_SYMBOL, NULL);
+	/* TODO: Use the filename, Luke. */
+
+	symbol->priv->library = library;
+	g_object_ref (library);
+}
+
+/**
+ * ld_symbol_build_identifier:
+ * @self: A symbol object.
+ *
+ * Build an identifier for the symbol.
+ * The identifier is in the format "Category/Category/Symbol".
+ */
+char *
+ld_symbol_build_identifier (LdSymbol *self)
+{
+	return NULL;
+}
+
+/**
+ * ld_symbol_draw:
+ * @self: A symbol object.
+ * @surface: A cairo surface to be drawn on.
+ * @param: Parameters for the symbol in a table.
+ * @x: The X coordinate on the surface.
+ * @y: The Y coordinate on the surface.
+ * @zoom: Zoom ratio.
+ *
+ * Draw the symbol onto a Cairo surface.
+ */
+void
+ld_symbol_draw (LdSymbol *self, cairo_t *surface,
+	GHashTable *param, gint x, gint y, gdouble zoom)
+{
+	return;
+}