QmlJSScriptConsole: Refactored ScriptConsole, added functionality.

The ScriptConsole is renamed to QmlJSScriptConsole. The console can be used
to evaluate expressions during a QML application debug session.
Changes:
* Console can be used even when application is not on a debug break
* The object context is the currently selected object in Inspector
* ContextMenu has a Clear option
* Multiple line expressions are supported
* Traverse Command History using up and down arrow keys

Change-Id: I4e1cd8763d60be43dbba395ead2a9a086d6bab7d
Reviewed-by: Roberto Raggi <roberto.raggi@nokia.com>
Reviewed-by: Kai Koehne <kai.koehne@nokia.com>

src/plugins/debugger/qml/interactiveinterpreter.h

@@ -0,0 +1,71 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (info@qt.nokia.com)
+**
+**
+** GNU Lesser General Public License Usage
+**
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this file.
+** Please review the following information to ensure the GNU Lesser General
+** Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** Other Usage
+**
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at info@qt.nokia.com.
+**
+**************************************************************************/
+
+#ifndef INTERACTIVEINTERPRETER_H
+#define INTERACTIVEINTERPRETER_H
+
+#include <qmljs/parser/qmljslexer_p.h>
+#include <qmljs/parser/qmljsengine_p.h>
+
+#include <QtCore/QVector>
+#include <QtCore/QString>
+#include <QtCore/QList>
+
+namespace Debugger {
+namespace Internal {
+
+class InteractiveInterpreter: QmlJS::Lexer
+{
+public:
+    InteractiveInterpreter()
+        : Lexer(&m_engine),
+          m_stateStack(128)
+    {
+
+    }
+
+    void clearText() { m_code.clear(); }
+    void appendText(const QString &text) { m_code += text; }
+
+    QString code() const { return m_code; }
+    bool canEvaluate();
+
+private:
+    QmlJS::Engine m_engine;
+    QVector<int> m_stateStack;
+    QList<int> m_tokens;
+    QString m_code;
+};
+
+}
+}
+#endif // INTERACTIVEINTERPRETER_H