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lib/engine/rs_clipboard.h

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+/****************************************************************************
+**
+** This file is part of the LibreCAD project, a 2D CAD program
+**
+** Copyright (C) 2010 R. van Twisk (librecad@rvt.dds.nl)
+** Copyright (C) 2001-2003 RibbonSoft. All rights reserved.
+**
+**
+** This file may be distributed and/or modified under the terms of the
+** GNU General Public License version 2 as published by the Free Software 
+** Foundation and appearing in the file gpl-2.0.txt included in the
+** packaging of this file.
+**
+** 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, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+**
+** This copyright notice MUST APPEAR in all copies of the script!  
+**
+**********************************************************************/
+
+
+#ifndef RS_CLIPBOARD_H
+#define RS_CLIPBOARD_H
+
+#include <iosfwd>
+#include "rs_graphic.h"
+
+#define RS_CLIPBOARD RS_Clipboard::instance()
+
+class RS_Block;
+class RS_Layer;
+class RS_Entity;
+
+/**
+ * LibreCAD internal clipboard. We don't use the system clipboard for
+ * better portaility.
+ * Implemented as singleton.
+ *
+ * @author Andrew Mustun
+ */
+class RS_Clipboard {
+protected:
+    RS_Clipboard() {
+    }
+
+public:
+    /**
+     * @return Instance to the unique clipboard object.
+     */
+    static RS_Clipboard* instance() {
+        if (uniqueInstance==NULL) {
+            uniqueInstance = new RS_Clipboard();
+        }
+        return uniqueInstance;
+    }
+
+	void clear();
+
+	void addBlock(RS_Block* b);
+        bool hasBlock(const QString& name);
+	int  countBlocks() {
+		return graphic.countBlocks();
+	}
+	RS_Block* blockAt(int i) {
+		return graphic.blockAt(i);
+	}
+	
+	void addLayer(RS_Layer* l);
+        bool hasLayer(const QString& name);
+	int  countLayers() {
+		return graphic.countLayers();
+	}
+	RS_Layer* layerAt(int i) {
+		return graphic.layerAt(i);
+	}
+
+	void addEntity(RS_Entity* e);
+
+    unsigned count() {
+		return graphic.count();
+	}
+    RS_Entity* entityAt(unsigned i) {
+		return graphic.entityAt(i);
+	}
+	RS_Entity* firstEntity() {
+		return graphic.firstEntity();
+	}
+	
+	RS_Entity* nextEntity() {
+		return graphic.nextEntity();
+	}
+
+	RS_Graphic* getGraphic() {
+		return &graphic;
+	}
+
+    friend std::ostream& operator << (std::ostream& os, RS_Clipboard& cb);
+
+protected:
+    static RS_Clipboard* uniqueInstance;
+
+	RS_Graphic graphic;
+};
+
+#endif
+