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/*
* Copyright (C) 2008 Rolf Eike Beer <kde@opensource.sf-tec.de>
*/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef KLINEBUFFEREDPROCESS_H
#define KLINEBUFFEREDPROCESS_H
#include <KProcess>
#include "klinebufferedprocessprivate.h"
class QByteArray;
/**
* Read output of a process split into lines
*
* This class reads the output of a process and splits it up into lines. This
* is especially useful if you try to parse the output of a command line tool.
*
* \b Usage \n
*
* The class is created and set up like a KProcess. After this you can do
* something like this:
*
* \code
* connect(m_linebufprocess, &KLineBufferedProcess::lineReadyStandardOutput, this, &Class::dataStdout);
* ...
* void myobj::dataStdout()
* {
* while (m_linebufprocess->hasLineStandardOutput()) {
* QByteArray line;
* m_linebufprocess->readLineStandardOutput(line);
* ...
* }
* }
* \endcode
*
* Never use the read functionality of KProcess with this class. This class
* needs to read all data from the process into an internal buffer first. If
* you try to use the read functions of the parent classes you would normally
* get no output at all.
*
* The write functions of the parent classes are not effected. You can use
* them exactly the same way as in KProcess.
*
* @author Rolf Eike Beer
*/
class KLineBufferedProcess : public KProcess
{
Q_OBJECT
friend class KLineBufferedProcessPrivate;
public:
/**
* Constructor
*/
explicit KLineBufferedProcess(QObject *parent = nullptr);
/**
* Destructor
*/
~KLineBufferedProcess();
/**
* Reads a line of text (excluding '\\n') from stdout.
*
* Use readLineStdout() in response to a lineReadyStdout() signal or
* when hasLineStdout() returns true. You may use it multiple times if
* more than one line of data is available. If no complete line is
* available the content of line is undefined and the function returns
* false.
*
* @param line is used to store the line that was read.
* @return if data was read or not
*/
bool readLineStandardOutput(QByteArray *line);
/**
* Reads a line of text (excluding '\\n') from stderr.
*
* Use readLineStderr() in response to a lineReadyStderr() signal or
* when hasLineStderr() returns true. You may use it multiple times if
* more than one line of data is available. If no complete line is
* available the content of line is undefined and the function returns
* false.
*
* @param line is used to store the line that was read.
* @return if data was read or not
*/
bool readLineStandardError(QByteArray *line);
/**
* Checks if a line is ready on stdout
*
* @return true if a complete line can be read
*/
bool hasLineStandardOutput() const;
/**
* Checks if a line is ready on stdout
*
* @return true if a complete line can be read
*/
bool hasLineStandardError() const;
signals:
/**
* Emitted when there is a line of data available from stdout when there was
* previously none.
* There may or may not be more than one line available for reading when this
* signal is emitted.
*/
void lineReadyStandardOutput();
/**
* Emitted when there is a line of data available from stderr when there was
* previously none.
* There may or may not be more than one line available for reading when this
* signal is emitted.
*/
void lineReadyStandardError();
private:
KLineBufferedProcessPrivate* const d;
};
#endif // KLINEBUFFEREDPROCESS_H
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