--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gui/qterminal/libqterminal/Emulation.cpp	Mon Jan 23 22:35:00 2012 +0100
@@ -0,0 +1,543 @@
+/*
+    This file is part of Konsole, an X terminal.
+
+    Copyright (C) 2007 Robert Knight <robertknight@gmail.com> 
+    Copyright (C) 1997,1998 by Lars Doelle <lars.doelle@on-line.de>
+    Copyright (C) 1996 by Matthias Ettrich <ettrich@kde.org>
+
+    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.
+*/
+
+// Own
+#include "Emulation.h"
+
+// System
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+// Qt
+#include <QtGui/QApplication>
+#include <QtGui/QClipboard>
+#include <QtCore/QHash>
+#include <QtGui/QKeyEvent>
+#include <QtCore/QRegExp>
+#include <QtCore/QTextStream>
+#include <QtCore/QThread>
+
+#include <QtCore/QTime>
+
+// Konsole
+#include "KeyboardTranslator.h"
+#include "Screen.h"
+#include "TerminalCharacterDecoder.h"
+#include "ScreenWindow.h"
+
+using namespace Konsole;
+
+/* ------------------------------------------------------------------------- */
+/*                                                                           */
+/*                               Emulation                                  */
+/*                                                                           */
+/* ------------------------------------------------------------------------- */
+
+//#define CNTL(c) ((c)-'@')
+
+/*!
+*/
+
+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;
+}
+
+/*! change between primary and alternate _screen
+*/
+
+void Emulation::setScreen(int n)
+{
+  Screen *old = _currentScreen;
+  _currentScreen = _screen[n&1];
+  if (_currentScreen != old) 
+  {
+     old->setBusySelecting(false);
+
+     // tell all windows onto this emulation to switch to the newly active _screen
+     QListIterator<ScreenWindow*> windowIter(_windows);
+     while ( windowIter.hasNext() )
+     {
+         windowIter.next()->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()
+{
+  return _screen[0]->getScroll();
+}
+
+void Emulation::setCodec(const QTextCodec * qtc)
+{
+  Q_ASSERT( qtc );
+
+  _codec = qtc;
+  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);
+}
+
+QString Emulation::keyBindings()
+{
+  return _keyTranslator->name();
+}
+
+
+// Interpreting Codes ---------------------------------------------------------
+
+/*
+   This section deals with decoding the incoming character stream.
+   Decoding means here, that the stream is first separated into `tokens'
+   which are then mapped to a `meaning' provided as operations by the
+   `Screen' class.
+*/
+
+/*!
+*/
+
+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->Tabulate();                  break;
+    case '\n'      : _currentScreen->NewLine();                   break;
+    case '\r'      : _currentScreen->Return();                    break;
+    case 0x07      : emit stateSet(NOTIFYBELL);
+                     break;
+    default        : _currentScreen->ShowCharacter(c);            break;
+  };
+}
+
+/* ------------------------------------------------------------------------- */
+/*                                                                           */
+/*                             Keyboard Handling                             */
+/*                                                                           */
+/* ------------------------------------------------------------------------- */
+
+/*!
+*/
+
+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, but since this
+    // routine will never be used, we simply emit plain ascii.
+    //emit sendBlock(ev->text().toAscii(),ev->text().length());
+    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
+}
+
+// Unblocking, Byte to Unicode translation --------------------------------- --
+
+/*
+   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();
+    }
+  }
+}*/
+
+// Selection --------------------------------------------------------------- --
+
+#if 0
+void Emulation::onSelectionBegin(const int x, const int y, const bool columnmode) {
+  if (!connected) return;
+  _currentScreen->setSelectionStart( x,y,columnmode);
+  showBulk();
+}
+
+void Emulation::onSelectionExtend(const int x, const int y) {
+  if (!connected) return;
+  _currentScreen->setSelectionEnd(x,y);
+  showBulk();
+}
+
+void Emulation::setSelection(const bool preserve_line_breaks) {
+  if (!connected) return;
+  QString t = _currentScreen->selectedText(preserve_line_breaks);
+  if (!t.isNull()) 
+  {
+    QListIterator< TerminalDisplay* > viewIter(_views);
+
+    while (viewIter.hasNext())    
+        viewIter.next()->setSelection(t);
+  }
+}
+
+void Emulation::testIsSelected(const int x, const int y, bool &selected)
+{
+  if (!connected) return;
+  selected=_currentScreen->isSelected(x,y);
+}
+
+void Emulation::clearSelection() {
+  if (!connected) return;
+  _currentScreen->clearSelection();
+  showBulk();
+}
+
+#endif 
+
+void Emulation::writeToStream( TerminalCharacterDecoder* _decoder , 
+                               int startLine ,
+                               int endLine) 
+{
+  _currentScreen->writeToStream(_decoder,startLine,endLine);
+}
+
+int Emulation::lineCount()
+{
+    // sum number of lines currently on _screen plus number of lines in history
+    return _currentScreen->getLines() + _currentScreen->getHistLines();
+}
+
+// Refreshing -------------------------------------------------------------- --
+
+#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::getErase() const
+{
+  return '\b';
+}
+
+void Emulation::setImageSize(int lines, int columns)
+{
+  //kDebug() << "Resizing image to: " << lines << "by" << columns << QTime::currentTime().msec();
+  Q_ASSERT( lines > 0 );
+  Q_ASSERT( columns > 0 );
+
+  _screen[0]->resizeImage(lines,columns);
+  _screen[1]->resizeImage(lines,columns);
+
+  emit imageSizeChanged(lines,columns);
+
+  bufferedUpdate();
+}
+
+QSize Emulation::imageSize()
+{
+  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 "moc_Emulation.cpp"
+