ScriptConsole: Move from Debugger to QmlJSTools

The console is now a part of qmljstools plugin. The console
appears as an output pane. A dummy QScriptEngine evaluates
expressions when a declarative debug session is not in
progress. During a debug session, the expressions are
evaluated by the debug services.

Task-Number: QTCREATORBUG-7402

Change-Id: Ic2eeac44fb335c706be03b89f8672b0356efe984
Reviewed-by: Christiaan Janssen <christiaan.janssen@digia.com>
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/qmljstools/qmljsinterpreter.h

@@ -0,0 +1,40 @@
+#ifndef QMLJSINTERPRETER_H
+#define QMLJSINTERPRETER_H
+
+#include <qmljs/parser/qmljslexer_p.h>
+#include <qmljs/parser/qmljsengine_p.h>
+
+#include <QVector>
+#include <QString>
+#include <QList>
+
+namespace QmlJSTools {
+namespace Internal {
+
+class QmlJSInterpreter: QmlJS::Lexer
+{
+public:
+    QmlJSInterpreter()
+        : 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;
+};
+
+} // namespace Internal
+} // namespace QmlJSTools
+
+#endif // QMLJSINTERPRETER_H