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/*
This file is part of Konsole, KDE's terminal emulator.
Copyright (C) 2007 by Robert Knight <robertknight@gmail.com>
Copyright (C) 1997,1998 by Lars Doelle <lars.doelle@on-line.de>
Rewritten for QT4 by e_k <e_k at users.sourceforge.net>, Copyright (C)2008
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.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
*/
#ifndef PTY_H
#define PTY_H
// Qt
#include <QtCore/QStringList>
#include <QtCore/QVector>
#include <QtCore/QList>
#include <QtCore>
#include "k3process.h"
namespace Konsole
{
/**
* The Pty class is used to start the terminal process,
* send data to it, receive data from it and manipulate
* various properties of the pseudo-teletype interface
* used to communicate with the process.
*
* To use this class, construct an instance and connect
* to the sendData slot and receivedData signal to
* send data to or receive data from the process.
*
* To start the terminal process, call the start() method
* with the program name and appropriate arguments.
*/
class Pty: public K3Process
{
Q_OBJECT
public:
/**
* Constructs a new Pty.
*
* Connect to the sendData() slot and receivedData() signal to prepare
* for sending and receiving data from the terminal process.
*
* To start the terminal process, call the run() method with the
* name of the program to start and appropriate arguments.
*/
Pty();
~Pty();
/**
* Starts the terminal process.
*
* Returns 0 if the process was started successfully or non-zero
* otherwise.
*
* @param program Path to the program to start
* @param arguments Arguments to pass to the program being started
* @param environment A list of key=value pairs which will be added
* to the environment for the new process. At the very least this
* should include an assignment for the TERM environment variable.
* @param winid Specifies the value of the WINDOWID environment variable
* in the process's environment.
* @param addToUtmp Specifies whether a utmp entry should be created for
* the pty used. See K3Process::setUsePty()
* @param dbusService Specifies the value of the KONSOLE_DBUS_SERVICE
* environment variable in the process's environment.
* @param dbusSession Specifies the value of the KONSOLE_DBUS_SESSION
* environment variable in the process's environment.
*/
int start( const QString& program,
const QStringList& arguments,
const QStringList& environment,
ulong winid,
bool addToUtmp
// const QString& dbusService,
// const QString& dbusSession
);
/** TODO: Document me */
void setWriteable(bool writeable);
/**
* Enables or disables Xon/Xoff flow control.
*/
void setXonXoff(bool on);
/**
* Sets the size of the window (in lines and columns of characters)
* used by this teletype.
*/
void setWindowSize(int lines, int cols);
/** Returns the size of the window used by this teletype. See setWindowSize() */
QSize windowSize() const;
/** TODO Document me */
void setErase(char erase);
/** */
char erase() const;
/**
* Returns the process id of the teletype's current foreground
* process. This is the process which is currently reading
* input sent to the terminal via. sendData()
*
* If there is a problem reading the foreground process group,
* 0 will be returned.
*/
int foregroundProcessGroup() const;
/**
* Returns whether the buffer used to send data to the
* terminal process is full.
*/
bool bufferFull() const { return _bufferFull; }
public slots:
/**
* Put the pty into UTF-8 mode on systems which support it.
*/
void setUtf8Mode(bool on);
/**
* Suspend or resume processing of data from the standard
* output of the terminal process.
*
* See K3Process::suspend() and K3Process::resume()
*
* @param lock If true, processing of output is suspended,
* otherwise processing is resumed.
*/
void lockPty(bool lock);
/**
* Sends data to the process currently controlling the
* teletype ( whose id is returned by foregroundProcessGroup() )
*
* @param buffer Pointer to the data to send.
* @param length Length of @p buffer.
*/
void sendData(const char* buffer, int length);
signals:
/**
* Emitted when the terminal process terminates.
*
* @param exitCode The status code which the process exited with.
*/
void done(int exitCode);
/**
* Emitted when a new block of data is received from
* the teletype.
*
* @param buffer Pointer to the data received.
* @param length Length of @p buffer
*/
void receivedData(const char* buffer, int length);
/**
* Emitted when the buffer used to send data to the terminal
* process becomes empty, i.e. all data has been sent.
*/
void bufferEmpty();
private slots:
// called when terminal process exits
void donePty();
// called when data is received from the terminal process
void dataReceived(K3Process*, char* buffer, int length);
// sends the first enqueued buffer of data to the
// terminal process
void doSendJobs();
// called when the terminal process is ready to
// receive more data
void writeReady();
private:
// takes a list of key=value pairs and adds them
// to the environment for the process
void addEnvironmentVariables(const QStringList& environment);
// enqueues a buffer of data to be sent to the
// terminal process
void appendSendJob(const char* buffer, int length);
// a buffer of data in the queue to be sent to the
// terminal process
class SendJob {
public:
SendJob() {}
SendJob(const char* b, int len) : buffer(len)
{
memcpy( buffer.data() , b , len );
}
const char* data() const { return buffer.constData(); }
int length() const { return buffer.size(); }
private:
QVector<char> buffer;
};
QList<SendJob> _pendingSendJobs;
bool _bufferFull;
int _windowColumns;
int _windowLines;
char _eraseChar;
bool _xonXoff;
bool _utf8;
KPty *_pty;
};
}
#endif // PTY_H
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