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qtermwidget-packaging/lib/Emulation.cpp

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12 KiB

/*
Copyright 2007-2008 Robert Knight <robertknight@gmail.com>
Copyright 1997,1998 by Lars Doelle <lars.doelle@on-line.de>
Copyright 1996 by Matthias Ettrich <ettrich@kde.org>
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.
*/
// Own
#include "Emulation.h"
// System
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
// Qt
#include <QApplication>
#include <QClipboard>
#include <QHash>
#include <QKeyEvent>
#include <QRegExp>
#include <QTextStream>
#include <QThread>
#include <QTime>
// KDE
//#include <kdebug.h>
// Konsole
#include "KeyboardTranslator.h"
#include "Screen.h"
#include "TerminalCharacterDecoder.h"
#include "ScreenWindow.h"
using namespace Konsole;
Emulation::Emulation() :
_currentScreen(0),
_codec(0),
_decoder(0),
_keyTranslator(0),
_usesMouse(false)
{
// create screens with a default size
_screen[0] = new Screen(40,80);
_screen[1] = new Screen(40,80);
_currentScreen = _screen[0];
QObject::connect(&_bulkTimer1, SIGNAL(timeout()), this, SLOT(showBulk()) );
QObject::connect(&_bulkTimer2, SIGNAL(timeout()), this, SLOT(showBulk()) );
// listen for mouse status changes
connect( this , SIGNAL(programUsesMouseChanged(bool)) ,
SLOT(usesMouseChanged(bool)) );
}
bool Emulation::programUsesMouse() const
{
return _usesMouse;
}
void Emulation::usesMouseChanged(bool usesMouse)
{
_usesMouse = usesMouse;
}
ScreenWindow* Emulation::createWindow()
{
ScreenWindow* window = new ScreenWindow();
window->setScreen(_currentScreen);
_windows << window;
connect(window , SIGNAL(selectionChanged()),
this , SLOT(bufferedUpdate()));
connect(this , SIGNAL(outputChanged()),
window , SLOT(notifyOutputChanged()) );
return window;
}
Emulation::~Emulation()
{
QListIterator<ScreenWindow*> windowIter(_windows);
while (windowIter.hasNext())
{
delete windowIter.next();
}
delete _screen[0];
delete _screen[1];
delete _decoder;
}
void Emulation::setScreen(int n)
{
Screen *old = _currentScreen;
_currentScreen = _screen[n & 1];
if (_currentScreen != old)
{
// tell all windows onto this emulation to switch to the newly active screen
foreach(ScreenWindow* window,_windows)
window->setScreen(_currentScreen);
}
}
void Emulation::clearHistory()
{
_screen[0]->setScroll( _screen[0]->getScroll() , false );
}
void Emulation::setHistory(const HistoryType& t)
{
_screen[0]->setScroll(t);
showBulk();
}
const HistoryType& Emulation::history() const
{
return _screen[0]->getScroll();
}
void Emulation::setCodec(const QTextCodec * qtc)
{
if (qtc)
_codec = qtc;
else
setCodec(LocaleCodec);
delete _decoder;
_decoder = _codec->makeDecoder();
emit useUtf8Request(utf8());
}
void Emulation::setCodec(EmulationCodec codec)
{
if ( codec == Utf8Codec )
setCodec( QTextCodec::codecForName("utf8") );
else if ( codec == LocaleCodec )
setCodec( QTextCodec::codecForLocale() );
}
void Emulation::setKeyBindings(const QString& name)
{
_keyTranslator = KeyboardTranslatorManager::instance()->findTranslator(name);
if (!_keyTranslator)
{
_keyTranslator = KeyboardTranslatorManager::instance()->defaultTranslator();
}
}
QString Emulation::keyBindings() const
{
return _keyTranslator->name();
}
void Emulation::receiveChar(int c)
// process application unicode input to terminal
// this is a trivial scanner
{
c &= 0xff;
switch (c)
{
case '\b' : _currentScreen->backspace(); break;
case '\t' : _currentScreen->tab(); break;
case '\n' : _currentScreen->newLine(); break;
case '\r' : _currentScreen->toStartOfLine(); break;
case 0x07 : emit stateSet(NOTIFYBELL);
break;
default : _currentScreen->displayCharacter(c); break;
};
}
void Emulation::sendKeyEvent( QKeyEvent* ev )
{
emit stateSet(NOTIFYNORMAL);
if (!ev->text().isEmpty())
{ // A block of text
// Note that the text is proper unicode.
// We should do a conversion here
emit sendData(ev->text().toUtf8(),ev->text().length());
}
}
void Emulation::sendString(const char*,int)
{
// default implementation does nothing
}
void Emulation::sendMouseEvent(int /*buttons*/, int /*column*/, int /*row*/, int /*eventType*/)
{
// default implementation does nothing
}
/*
We are doing code conversion from locale to unicode first.
TODO: Character composition from the old code. See #96536
*/
void Emulation::receiveData(const char* text, int length)
{
emit stateSet(NOTIFYACTIVITY);
bufferedUpdate();
QString unicodeText = _decoder->toUnicode(text,length);
//send characters to terminal emulator
for (int i=0;i<unicodeText.length();i++)
receiveChar(unicodeText[i].unicode());
//look for z-modem indicator
//-- someone who understands more about z-modems that I do may be able to move
//this check into the above for loop?
for (int i=0;i<length;i++)
{
if (text[i] == '\030')
{
if ((length-i-1 > 3) && (strncmp(text+i+1, "B00", 3) == 0))
emit zmodemDetected();
}
}
}
//OLDER VERSION
//This version of onRcvBlock was commented out because
// a) It decoded incoming characters one-by-one, which is slow in the current version of Qt (4.2 tech preview)
// b) It messed up decoding of non-ASCII characters, with the result that (for example) chinese characters
// were not printed properly.
//
//There is something about stopping the _decoder if "we get a control code halfway a multi-byte sequence" (see below)
//which hasn't been ported into the newer function (above). Hopefully someone who understands this better
//can find an alternative way of handling the check.
/*void Emulation::onRcvBlock(const char *s, int len)
{
emit notifySessionState(NOTIFYACTIVITY);
bufferedUpdate();
for (int i = 0; i < len; i++)
{
QString result = _decoder->toUnicode(&s[i],1);
int reslen = result.length();
// If we get a control code halfway a multi-byte sequence
// we flush the _decoder and continue with the control code.
if ((s[i] < 32) && (s[i] > 0))
{
// Flush _decoder
while(!result.length())
result = _decoder->toUnicode(&s[i],1);
reslen = 1;
result.resize(reslen);
result[0] = QChar(s[i]);
}
for (int j = 0; j < reslen; j++)
{
if (result[j].characterategory() == QChar::Mark_NonSpacing)
_currentScreen->compose(result.mid(j,1));
else
onRcvChar(result[j].unicode());
}
if (s[i] == '\030')
{
if ((len-i-1 > 3) && (strncmp(s+i+1, "B00", 3) == 0))
emit zmodemDetected();
}
}
}*/
void Emulation::writeToStream( TerminalCharacterDecoder* _decoder ,
int startLine ,
int endLine)
{
_currentScreen->writeLinesToStream(_decoder,startLine,endLine);
}
int Emulation::lineCount() const
{
// sum number of lines currently on _screen plus number of lines in history
return _currentScreen->getLines() + _currentScreen->getHistLines();
}
#define BULK_TIMEOUT1 10
#define BULK_TIMEOUT2 40
void Emulation::showBulk()
{
_bulkTimer1.stop();
_bulkTimer2.stop();
emit outputChanged();
_currentScreen->resetScrolledLines();
_currentScreen->resetDroppedLines();
}
void Emulation::bufferedUpdate()
{
_bulkTimer1.setSingleShot(true);
_bulkTimer1.start(BULK_TIMEOUT1);
if (!_bulkTimer2.isActive())
{
_bulkTimer2.setSingleShot(true);
_bulkTimer2.start(BULK_TIMEOUT2);
}
}
char Emulation::eraseChar() const
{
return '\b';
}
void Emulation::setImageSize(int lines, int columns)
{
if ((lines < 1) || (columns < 1))
return;
QSize screenSize[2] = { QSize(_screen[0]->getColumns(),
_screen[0]->getLines()),
QSize(_screen[1]->getColumns(),
_screen[1]->getLines()) };
QSize newSize(columns,lines);
if (newSize == screenSize[0] && newSize == screenSize[1])
return;
_screen[0]->resizeImage(lines,columns);
_screen[1]->resizeImage(lines,columns);
emit imageSizeChanged(lines,columns);
bufferedUpdate();
}
QSize Emulation::imageSize() const
{
return QSize(_currentScreen->getColumns(), _currentScreen->getLines());
}
ushort ExtendedCharTable::extendedCharHash(ushort* unicodePoints , ushort length) const
{
ushort hash = 0;
for ( ushort i = 0 ; i < length ; i++ )
{
hash = 31*hash + unicodePoints[i];
}
return hash;
}
bool ExtendedCharTable::extendedCharMatch(ushort hash , ushort* unicodePoints , ushort length) const
{
ushort* entry = extendedCharTable[hash];
// compare given length with stored sequence length ( given as the first ushort in the
// stored buffer )
if ( entry == 0 || entry[0] != length )
return false;
// if the lengths match, each character must be checked. the stored buffer starts at
// entry[1]
for ( int i = 0 ; i < length ; i++ )
{
if ( entry[i+1] != unicodePoints[i] )
return false;
}
return true;
}
ushort ExtendedCharTable::createExtendedChar(ushort* unicodePoints , ushort length)
{
// look for this sequence of points in the table
ushort hash = extendedCharHash(unicodePoints,length);
// check existing entry for match
while ( extendedCharTable.contains(hash) )
{
if ( extendedCharMatch(hash,unicodePoints,length) )
{
// this sequence already has an entry in the table,
// return its hash
return hash;
}
else
{
// if hash is already used by another, different sequence of unicode character
// points then try next hash
hash++;
}
}
// add the new sequence to the table and
// return that index
ushort* buffer = new ushort[length+1];
buffer[0] = length;
for ( int i = 0 ; i < length ; i++ )
buffer[i+1] = unicodePoints[i];
extendedCharTable.insert(hash,buffer);
return hash;
}
ushort* ExtendedCharTable::lookupExtendedChar(ushort hash , ushort& length) const
{
// lookup index in table and if found, set the length
// argument and return a pointer to the character sequence
ushort* buffer = extendedCharTable[hash];
if ( buffer )
{
length = buffer[0];
return buffer+1;
}
else
{
length = 0;
return 0;
}
}
ExtendedCharTable::ExtendedCharTable()
{
}
ExtendedCharTable::~ExtendedCharTable()
{
// free all allocated character buffers
QHashIterator<ushort,ushort*> iter(extendedCharTable);
while ( iter.hasNext() )
{
iter.next();
delete[] iter.value();
}
}
// global instance
ExtendedCharTable ExtendedCharTable::instance;
//#include "Emulation.moc"