PythonEditor: Modernize/Streamline

Remove virtual, add override, add = delete, remove QLatin1*,
flatten filesystem hierarchy, remove unneeded 'inline',
use initializer list, etc.

Change-Id: I0a95d806d73ca1a33cfd1ba85c2664d9ebc32690
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/pythoneditor/pythonscanner.h

@@ -0,0 +1,98 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** 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 "pythonformattoken.h"
+
+#include <QString>
+
+namespace PythonEditor {
+namespace Internal {
+
+/**
+ * @brief The Scanner class - scans source code for highlighting only
+ */
+class Scanner
+{
+    Scanner(const Scanner &other) = delete;
+    void operator=(const Scanner &other) = delete;
+
+public:
+    enum State {
+        State_Default,
+        State_String,
+        State_MultiLineString
+    };
+
+    Scanner(const QChar *text, const int length);
+
+    void setState(int state);
+    int state() const;
+    FormatToken read();
+    QString value(const FormatToken& tk) const;
+
+private:
+    FormatToken onDefaultState();
+
+    void checkEscapeSequence(QChar quoteChar);
+    FormatToken readStringLiteral(QChar quoteChar);
+    FormatToken readMultiLineStringLiteral(QChar quoteChar);
+    FormatToken readIdentifier();
+    FormatToken readNumber();
+    FormatToken readFloatNumber();
+    FormatToken readComment();
+    FormatToken readDoxygenComment();
+    FormatToken readWhiteSpace();
+    FormatToken readOperator();
+
+    void clearState();
+    void saveState(State state, QChar savedData);
+    void parseState(State &state, QChar &savedData) const;
+
+    void setAnchor() { m_markedPosition = m_position; }
+    void move() { ++m_position; }
+    int length() const { return m_position - m_markedPosition; }
+    int anchor() const { return m_markedPosition; }
+    bool isEnd() const { return m_position >= m_textLength; }
+
+    QChar peek(int offset = 0) const
+    {
+        int pos = m_position + offset;
+        if (pos >= m_textLength)
+            return QLatin1Char('\0');
+        return m_text[pos];
+    }
+
+    const QChar *m_text;
+    const int m_textLength;
+    int m_position = 0;
+    int m_markedPosition = 0;
+
+    int m_state;
+};
+
+} // namespace Internal
+} // namespace PythonEditor