Plugins: new serial terminal plugin

Plugin adding serial terminals in the output pane.

Change-Id: I75d0f69f8d90268ff774e4eae30e36eda022d3aa
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: André Hartmann <aha_1980@gmx.de>

src/plugins/serialterminal/consolelineedit.h

@@ -0,0 +1,52 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 Benjamin Balga
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <QLineEdit>
+
+namespace SerialTerminal {
+namespace Internal {
+
+class ConsoleLineEdit : public QLineEdit
+{
+public:
+    explicit ConsoleLineEdit(QWidget *parent = nullptr);
+
+    void addHistoryEntry();
+    void loadHistoryEntry(int entryIndex);
+
+protected:
+    void keyPressEvent(QKeyEvent *event) override final;
+
+private:
+    QStringList m_history;
+    int m_maxEntries; // TODO: add to settings
+    int m_currentEntryIndex = 0;
+    QString m_editingEntry;
+};
+
+} // namespace Internal
+} // namespace SerialTerminal