Mercurial > ldforge / file diff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/misc/documentPointer.h	Sat Mar 29 05:38:03 2014 +0200
@@ -0,0 +1,74 @@
+/*
+ *  LDForge: LDraw parts authoring CAD
+ *  Copyright (C) 2013, 2014 Santeri Piippo
+ *
+ *  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/>.
+ */
+
+#pragma once
+
+#include "../main.h"
+
+class LDSubfile;
+class LDDocument;
+
+//!
+//! \brief A reference-counting pointer to LDDocument.
+//!
+//! The LDDocumentPointer class defines a reference-counting pointer which
+//! points to LDDocument.
+//!
+class LDDocumentPointer
+{
+	PROPERTY (private, LDDocument*, pointer, setPointer, STOCK_WRITE)
+
+	public:
+		//! Constructs a null LDDocumentPointer
+		LDDocumentPointer();
+
+		//! Constructs a document pointer with the given pointer
+		LDDocumentPointer (LDDocument* ptr);
+
+		//! Copy-constructs a LDDocumentPointer.
+		LDDocumentPointer (const LDDocumentPointer& other);
+
+		//! Destructs the pointer.
+		~LDDocumentPointer();
+
+		//! \param ptr the new pointer to change to.
+		LDDocumentPointer& operator= (LDDocument* ptr);
+
+		//! Copy operator.
+		//! \param other the pointer whose internal pointer to copy.
+		inline LDDocumentPointer& operator= (LDDocumentPointer& other)
+		{
+			return operator= (other.pointer());
+		}
+
+		//! Operator overload for a->b support.
+		inline LDDocument* operator->() const
+		{
+			return pointer();
+		}
+
+		//! Cast operator overload
+		inline operator LDDocument*() const
+		{
+			return pointer();
+		}
+
+	private:
+		void addReference();
+		void removeReference();
+};