Revamp terminalStrip feature code

Move RealTerminal class in a new file
Move PhysicalTerminal class in a new file.
Remove the use of QWeakPointer and use instead QSharedPointer
in a big part of the revamp.

sources/TerminalStrip/realterminal.h

@@ -0,0 +1,86 @@
+/*
+	Copyright 2006-2021 The QElectroTech Team
+	This file is part of QElectroTech.
+
+	QElectroTech 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 2 of the License, or
+	(at your option) any later version.
+
+	QElectroTech 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 QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef REALTERMINAL_H
+#define REALTERMINAL_H
+
+#include <QSharedPointer>
+#include <QDomElement>
+#include "../properties/elementdata.h"
+
+class TerminalStrip;
+class Element;
+class TerminalElement;
+class PhysicalTerminal;
+struct TerminalStripBridge;
+
+/**
+ * @brief The RealTerminal class
+ * Represent a real terminal.
+ * A real terminal can be a drawed terminal in a folio
+ * or a terminal set by user but not present
+ * on any folio (for example a reserved terminal).
+ *
+ * When create a new instance of RealTerminal you must
+ * call sharedRef() and only use the returned QSharedPointer
+ * instead of the raw pointer
+ */
+class RealTerminal
+{
+		friend class TerminalStrip;
+		friend class PhysicalTerminal;
+
+	private:
+		RealTerminal(TerminalStrip *strip, Element *element = nullptr);
+		QSharedPointer<RealTerminal> sharedRef();
+		QWeakPointer<RealTerminal> weakRef();
+
+		bool fromXml(QDomElement xml_element, const QVector<TerminalElement *> &terminal_vector);
+		QDomElement toXml(QDomDocument &parent_document) const;
+
+	public:
+		TerminalStrip *parentStrip() const;
+		int level() const;
+		QString label() const;
+		QString Xref() const;
+		QString cable() const;
+		QString cableWire() const;
+		QString conductor() const;
+
+		ElementData::TerminalType type() const;
+		ElementData::TerminalFunction function() const;
+
+		bool isLed() const;
+		bool isElement() const;
+		bool isBridged() const;
+
+		QSharedPointer<TerminalStripBridge> bridge() const;
+
+		Element* element() const;
+		QUuid elementUuid() const;
+		QUuid uuid() const;
+
+		static QString xmlTagName();
+
+	private :
+		QPointer<Element> m_element;
+		QPointer<TerminalStrip> m_parent_terminal_strip;
+		QUuid m_uuid = QUuid::createUuid();
+		QWeakPointer<RealTerminal> m_this_weak;
+};
+
+#endif // REALTERMINAL_H