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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** No Commercial Usage
**
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
**
** Alternatively, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**************************************************************************/
#ifndef DEBUGOUTPUTBASE_H
#define DEBUGOUTPUTBASE_H
#include "cdbcom.h"
#include <QtCore/QString>
#include <QtCore/QSharedPointer>
namespace CdbCore {
class CoreEngine;
// CdbDebugOutputBase is a base class for output handlers
// that takes care of the Active X magic and conversion to QString.
class DebugOutputBase : public IDebugOutputCallbacksWide
{
public:
virtual ~DebugOutputBase();
// IUnknown.
STDMETHOD(QueryInterface)(
THIS_
IN REFIID InterfaceId,
OUT PVOID* Interface
);
STDMETHOD_(ULONG, AddRef)(
THIS
);
STDMETHOD_(ULONG, Release)(
THIS
);
// IDebugOutputCallbacks.
STDMETHOD(Output)(
THIS_
IN ULONG mask,
IN PCWSTR text
);
// Helpers to retrieve the output callbacks IF
static IDebugOutputCallbacksWide *getOutputCallback(CIDebugClient *client);
static const char *maskDescription(ULONG m);
protected:
DebugOutputBase();
virtual void output(ULONG mask, const QString &message) = 0;
};
// An output handler that adds lines to a string (to be
// used for cases in which linebreaks occur in-between calls
// to output).
class StringOutputHandler : public DebugOutputBase
{
public:
StringOutputHandler() {}
QString result() const { return m_result; }
protected:
virtual void output(ULONG, const QString &message) { m_result += message; }
private:
QString m_result;
};
// Utility class to temporarily redirect output to another handler
// as long as in scope
class OutputRedirector {
Q_DISABLE_COPY(OutputRedirector)
public:
typedef QSharedPointer<DebugOutputBase> DebugOutputBasePtr;
explicit OutputRedirector(CoreEngine *engine, const DebugOutputBasePtr &o);
~OutputRedirector();
private:
CoreEngine *m_engine;
const DebugOutputBasePtr m_oldOutput;
};
} // namespace CdbCore
#endif // DEBUGOUTPUTBASE_H
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