--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgui/qterminal/libqterminal/unix/TerminalView.cpp	Mon Nov 26 12:07:51 2012 -0500
@@ -0,0 +1,2661 @@
+/*
+    This file is part of Konsole, a terminal emulator for KDE.
+
+    Copyright (C) 2006-7 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
+    Copyright (C) 2012 Jacob Dawid <jacob.dawid@googlemail.com>
+
+    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 "unix/TerminalView.h"
+
+// Qt
+#include <QtGui/QApplication>
+#include <QtGui/QBoxLayout>
+#include <QtGui/QClipboard>
+#include <QtGui/QKeyEvent>
+#include <QtCore/QEvent>
+#include <QtCore/QTime>
+#include <QtCore/QFile>
+#include <QtGui/QGridLayout>
+#include <QtGui/QLabel>
+#include <QtGui/QLayout>
+#include <QtGui/QPainter>
+#include <QtGui/QPixmap>
+#include <QtGui/QScrollBar>
+#include <QtGui/QStyle>
+#include <QtCore>
+#include <QtGui>
+
+#include "unix/Filter.h"
+#include "unix/konsole_wcwidth.h"
+#include "unix/ScreenWindow.h"
+#include "unix/TerminalCharacterDecoder.h"
+
+#ifndef loc
+#define loc(X,Y) ((Y)*_columns+(X))
+#endif
+
+#define yMouseScroll 1
+
+#define REPCHAR   "ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
+  "abcdefgjijklmnopqrstuvwxyz" \
+  "0123456789./+@"
+
+// scroll increment used when dragging selection at top/bottom of window.
+
+// static
+bool TerminalView::_antialiasText = true;
+
+/* ------------------------------------------------------------------------- */
+/*                                                                           */
+/*                                Colors                                     */
+/*                                                                           */
+/* ------------------------------------------------------------------------- */
+
+/* Note that we use ANSI color order (bgr), while IBMPC color order is (rgb)
+
+   Code        0       1       2       3       4       5       6       7
+   ----------- ------- ------- ------- ------- ------- ------- ------- -------
+   ANSI  (bgr) Black   Red     Green   Yellow  Blue    Magenta Cyan    White
+   IBMPC (rgb) Black   Blue    Green   Cyan    Red     Magenta Yellow  White
+*/
+
+ScreenWindow* TerminalView::screenWindow() const
+{
+  return _screenWindow;
+}
+void TerminalView::setScreenWindow(ScreenWindow* window)
+{
+  // disconnect existing screen window if any
+  if ( _screenWindow )
+    {
+      disconnect( _screenWindow , 0 , this , 0 );
+    }
+
+  _screenWindow = window;
+
+  if ( window )
+    {
+      //#warning "The order here is not specified - does it matter whether updateImage or updateLineProperties comes first?"
+      connect( _screenWindow , SIGNAL(outputChanged()) , this , SLOT(updateLineProperties()) );
+      connect( _screenWindow , SIGNAL(outputChanged()) , this , SLOT(updateImage()) );
+      window->setWindowLines(_lines);
+    }
+}
+
+const ColorEntry* TerminalView::colorTable() const
+{
+  return _colorTable;
+}
+
+void TerminalView::setColorTable(const ColorEntry table[])
+{
+  for (int i = 0; i < TABLE_COLORS; i++)
+    _colorTable[i] = table[i];
+
+  QPalette p = palette();
+  p.setColor( backgroundRole(), _colorTable[DEFAULT_BACK_COLOR].color );
+  setPalette( p );
+
+  // Avoid propagating the palette change to the scroll bar
+  _scrollBar->setPalette( QApplication::palette() );
+
+  update();
+}
+
+/* ------------------------------------------------------------------------- */
+/*                                                                           */
+/*                                   Font                                    */
+/*                                                                           */
+/* ------------------------------------------------------------------------- */
+
+/*
+   The VT100 has 32 special graphical characters. The usual vt100 extended
+   xterm fonts have these at 0x00..0x1f.
+
+   QT's iso mapping leaves 0x00..0x7f without any changes. But the graphicals
+   come in here as proper unicode characters.
+
+   We treat non-iso10646 fonts as VT100 extended and do the required mapping
+   from unicode to 0x00..0x1f. The remaining translation is then left to the
+   QCodec.
+*/
+
+static inline bool isLineChar(quint16 c) { return ((c & 0xFF80) == 0x2500);}
+static inline bool isLineCharString(const QString& string)
+{
+  return (string.length() > 0) && (isLineChar(string.at(0).unicode()));
+}
+
+
+// assert for i in [0..31] : vt100extended(vt100_graphics[i]) == i.
+
+unsigned short vt100_graphics[32] =
+{ // 0/8     1/9    2/10    3/11    4/12    5/13    6/14    7/15
+  0x0020, 0x25C6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0,
+  0x00b1, 0x2424, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c,
+  0xF800, 0xF801, 0x2500, 0xF803, 0xF804, 0x251c, 0x2524, 0x2534,
+  0x252c, 0x2502, 0x2264, 0x2265, 0x03C0, 0x2260, 0x00A3, 0x00b7
+};
+
+void TerminalView::fontChange(const QFont&)
+{
+  QFontMetrics fm(font());
+  _fontHeight = fm.height() + _lineSpacing;
+
+
+  // waba TerminalDisplay 1.123:
+  // "Base character width on widest ASCII character. This prevents too wide
+  //  characters in the presence of double wide (e.g. Japanese) characters."
+  // Get the width from representative normal width characters
+  _fontWidth = (double)fm.width(REPCHAR)/(double)strlen(REPCHAR);
+
+  _fixedFont = true;
+
+  int fw = fm.width(REPCHAR[0]);
+  for(unsigned int i=1; i< strlen(REPCHAR); i++)
+    {
+      if (fw != fm.width(REPCHAR[i]))
+        {
+          _fixedFont = false;
+          break;
+        }
+    }
+
+
+  if (_fontWidth < 1)
+    _fontWidth = 1;
+
+  _fontAscent = fm.ascent();
+
+  emit changedFontMetricSignal( _fontHeight, _fontWidth );
+  //parentWidget()->setFixedWidth(_fontWidth * 80 + _leftMargin);
+  propagateSize();
+  update();
+}
+
+void TerminalView::setVTFont(const QFont& f)
+{
+  QFont font = f;
+
+  QFontMetrics metrics(font);
+
+  if ( metrics.height() < height() && metrics.maxWidth() < width() )
+    {
+      // hint that text should be drawn without anti-aliasing.
+      // depending on the user's font configuration, this may not be respected
+      if (!_antialiasText)
+        font.setStyleStrategy( QFont::NoAntialias );
+
+      // experimental optimization.  Konsole assumes that the terminal is using a
+      // mono-spaced font, in which case kerning information should have an effect.
+      // Disabling kerning saves some computation when rendering text.
+      // font.setKerning(false);
+
+      QWidget::setFont(font);
+      fontChange(font);
+    }
+}
+
+void TerminalView::setFont(const QFont &)
+{
+  // ignore font change request if not coming from konsole itself
+}
+
+/* ------------------------------------------------------------------------- */
+/*                                                                           */
+/*                         Constructor / Destructor                          */
+/*                                                                           */
+/* ------------------------------------------------------------------------- */
+
+TerminalView::TerminalView(QWidget *parent)
+  :QWidget(parent)
+  ,_screenWindow(0)
+  ,_allowBell(true)
+  ,_gridLayout(0)
+  ,_fontHeight(1)
+  ,_fontWidth(1)
+  ,_fontAscent(1)
+  ,_lines(1)
+  ,_columns(1)
+  ,_usedLines(1)
+  ,_usedColumns(1)
+  ,_contentHeight(1)
+  ,_contentWidth(1)
+  ,_image(0)
+  ,_randomSeed(0)
+  ,_resizing(false)
+  ,_terminalSizeHint(false)
+  ,_terminalSizeStartup(true)
+  ,_actSel(0)
+  ,_wordSelectionMode(false)
+  ,_lineSelectionMode(false)
+  ,_preserveLineBreaks(false)
+  ,_columnSelectionMode(false)
+  ,_scrollbarLocation(NoScrollBar)
+  ,_wordCharacters(":@-./_~")
+  ,_bellMode(SystemBeepBell)
+  ,_blinking(false)
+  ,_cursorBlinking(false)
+  ,_hasBlinkingCursor(false)
+  ,_ctrlDrag(false)
+  ,_tripleClickMode(SelectWholeLine)
+  ,_isFixedSize(false)
+  ,_possibleTripleClick(false)
+  ,_resizeWidget(0)
+  ,_resizeTimer(0)
+  ,_outputSuspendedLabel(0)
+  ,_lineSpacing(0)
+  ,_colorsInverted(false)
+  ,_blendColor(qRgba(0,0,0,0xff))
+  ,_filterChain(new TerminalImageFilterChain())
+  ,_cursorShape(BlockCursor)
+  ,_readonly(false)
+{
+  // terminal applications are not designed with Right-To-Left in mind,
+  // so the layout is forced to Left-To-Right
+  setLayoutDirection(Qt::LeftToRight);
+
+  // The offsets are not yet calculated.
+  // Do not calculate these too often to be more smoothly when resizing
+  // konsole in opaque mode.
+  _topMargin = DEFAULT_TOP_MARGIN;
+  _leftMargin = DEFAULT_LEFT_MARGIN;
+
+  // create scroll bar for scrolling output up and down
+  // set the scroll bar's slider to occupy the whole area of the scroll bar initially
+  _scrollBar = new QScrollBar(this);
+  setScroll(0,0);
+  _scrollBar->setCursor( Qt::ArrowCursor );
+  connect(_scrollBar, SIGNAL(valueChanged(int)), this,
+          SLOT(scrollBarPositionChanged(int)));
+
+  // setup timers for blinking cursor and text
+  _blinkTimer   = new QTimer(this);
+  connect(_blinkTimer, SIGNAL(timeout()), this, SLOT(blinkEvent()));
+  _blinkCursorTimer   = new QTimer(this);
+  connect(_blinkCursorTimer, SIGNAL(timeout()), this, SLOT(blinkCursorEvent()));
+
+  //  QCursor::setAutoHideCursor( this, true );
+
+  setUsesMouse(true);
+  setColorTable(base_color_table);
+  setMouseTracking(true);
+
+  // Enable drag and drop
+  setAcceptDrops(true); // attempt
+  dragInfo.state = diNone;
+
+  setFocusPolicy( Qt::WheelFocus );
+
+  // enable input method support
+  setAttribute(Qt::WA_InputMethodEnabled, true);
+
+  // this is an important optimization, it tells Qt
+  // that TerminalDisplay will handle repainting its entire area.
+  setAttribute(Qt::WA_OpaquePaintEvent);
+
+  _gridLayout = new QGridLayout(this);
+  _gridLayout->setMargin(0);
+
+  setLayout( _gridLayout );
+}
+
+TerminalView::~TerminalView()
+{
+  qApp->removeEventFilter( this );
+
+  delete[] _image;
+
+  delete _gridLayout;
+  delete _outputSuspendedLabel;
+  delete _filterChain;
+}
+
+/* ------------------------------------------------------------------------- */
+/*                                                                           */
+/*                             Display Operations                            */
+/*                                                                           */
+/* ------------------------------------------------------------------------- */
+
+/**
+ A table for emulating the simple (single width) unicode drawing chars.
+ It represents the 250x - 257x glyphs. If it's zero, we can't use it.
+ if it's not, it's encoded as follows: imagine a 5x5 grid where the points are numbered
+ 0 to 24 left to top, top to bottom. Each point is represented by the corresponding bit.
+
+ Then, the pixels basically have the following interpretation:
+ _|||_
+ -...-
+ -...-
+ -...-
+ _|||_
+
+where _ = none
+      | = vertical line.
+      - = horizontal line.
+ */
+
+
+enum LineEncode
+{
+  TopL  = (1<<1),
+  TopC  = (1<<2),
+  TopR  = (1<<3),
+
+  LeftT = (1<<5),
+  Int11 = (1<<6),
+  Int12 = (1<<7),
+  Int13 = (1<<8),
+  RightT = (1<<9),
+
+  LeftC = (1<<10),
+  Int21 = (1<<11),
+  Int22 = (1<<12),
+  Int23 = (1<<13),
+  RightC = (1<<14),
+
+  LeftB = (1<<15),
+  Int31 = (1<<16),
+  Int32 = (1<<17),
+  Int33 = (1<<18),
+  RightB = (1<<19),
+
+  BotL  = (1<<21),
+  BotC  = (1<<22),
+  BotR  = (1<<23)
+};
+
+#include "LineFont.h"
+
+static void drawLineChar(QPainter& paint, int x, int y, int w, int h, uchar code)
+{
+  //Calculate cell midpoints, end points.
+  int cx = x + w/2;
+  int cy = y + h/2;
+  int ex = x + w - 1;
+  int ey = y + h - 1;
+
+  quint32 toDraw = LineChars[code];
+
+  //Top _lines:
+  if (toDraw & TopL)
+    paint.drawLine(cx-1, y, cx-1, cy-2);
+  if (toDraw & TopC)
+    paint.drawLine(cx, y, cx, cy-2);
+  if (toDraw & TopR)
+    paint.drawLine(cx+1, y, cx+1, cy-2);
+
+  //Bot _lines:
+  if (toDraw & BotL)
+    paint.drawLine(cx-1, cy+2, cx-1, ey);
+  if (toDraw & BotC)
+    paint.drawLine(cx, cy+2, cx, ey);
+  if (toDraw & BotR)
+    paint.drawLine(cx+1, cy+2, cx+1, ey);
+
+  //Left _lines:
+  if (toDraw & LeftT)
+    paint.drawLine(x, cy-1, cx-2, cy-1);
+  if (toDraw & LeftC)
+    paint.drawLine(x, cy, cx-2, cy);
+  if (toDraw & LeftB)
+    paint.drawLine(x, cy+1, cx-2, cy+1);
+
+  //Right _lines:
+  if (toDraw & RightT)
+    paint.drawLine(cx+2, cy-1, ex, cy-1);
+  if (toDraw & RightC)
+    paint.drawLine(cx+2, cy, ex, cy);
+  if (toDraw & RightB)
+    paint.drawLine(cx+2, cy+1, ex, cy+1);
+
+  //Intersection points.
+  if (toDraw & Int11)
+    paint.drawPoint(cx-1, cy-1);
+  if (toDraw & Int12)
+    paint.drawPoint(cx, cy-1);
+  if (toDraw & Int13)
+    paint.drawPoint(cx+1, cy-1);
+
+  if (toDraw & Int21)
+    paint.drawPoint(cx-1, cy);
+  if (toDraw & Int22)
+    paint.drawPoint(cx, cy);
+  if (toDraw & Int23)
+    paint.drawPoint(cx+1, cy);
+
+  if (toDraw & Int31)
+    paint.drawPoint(cx-1, cy+1);
+  if (toDraw & Int32)
+    paint.drawPoint(cx, cy+1);
+  if (toDraw & Int33)
+    paint.drawPoint(cx+1, cy+1);
+
+}
+
+void TerminalView::drawLineCharString(	QPainter& painter, int x, int y, const QString& str,
+                                       const Character* attributes)
+{
+  const QPen& currentPen = painter.pen();
+
+  if ( attributes->rendition & RE_BOLD )
+    {
+      QPen boldPen(currentPen);
+      boldPen.setWidth(3);
+      painter.setPen( boldPen );
+    }
+
+  for (int i=0 ; i < str.length(); i++)
+    {
+      uchar code = str[i].cell();
+      if (LineChars[code])
+        drawLineChar(painter, x + (_fontWidth*i), y, _fontWidth, _fontHeight, code);
+    }
+
+  painter.setPen( currentPen );
+}
+
+void TerminalView::setKeyboardCursorShape(KeyboardCursorShape shape)
+{
+  _cursorShape = shape;
+}
+TerminalView::KeyboardCursorShape TerminalView::keyboardCursorShape() const
+{
+  return _cursorShape;
+}
+void TerminalView::setKeyboardCursorColor(bool useForegroundColor, const QColor& color)
+{
+  if (useForegroundColor)
+    _cursorColor = QColor(); // an invalid color means that
+  // the foreground color of the
+  // current character should
+  // be used
+
+  else
+    _cursorColor = color;
+}
+QColor TerminalView::keyboardCursorColor() const
+{
+  return _cursorColor;
+}
+
+void TerminalView::drawBackground(QPainter& painter, const QRect& rect, const QColor& backgroundColor)
+{
+  // the area of the widget showing the contents of the terminal display is drawn
+  // using the background color from the color scheme set with setColorTable()
+  //
+  // the area of the widget behind the scroll-bar is drawn using the background
+  // brush from the scroll-bar's palette, to give the effect of the scroll-bar
+  // being outside of the terminal display and visual consistency with other KDE
+  // applications.
+  //
+  QRect scrollBarArea = _scrollBar->isVisible() ?
+        rect.intersected(_scrollBar->geometry()) :
+        QRect();
+
+  QRegion contentsRegion = QRegion(rect).subtracted(scrollBarArea);
+  QRect contentsRect = contentsRegion.boundingRect();
+
+  painter.fillRect(contentsRect, backgroundColor);
+  painter.fillRect(scrollBarArea,_scrollBar->palette().background());
+}
+
+void TerminalView::drawCursor(QPainter& painter,
+                              const QRect& rect,
+                              const QColor& foregroundColor,
+                              const QColor& /*backgroundColor*/,
+                              bool& invertCharacterColor)
+{
+  QRect cursorRect = rect;
+  cursorRect.setHeight(_fontHeight - _lineSpacing - 1);
+
+  if (!_cursorBlinking)
+    {
+      if ( _cursorColor.isValid() )
+        painter.setPen(_cursorColor);
+      else {
+          painter.setPen(foregroundColor);
+        }
+
+      if ( _cursorShape == BlockCursor )
+        {
+          // draw the cursor outline, adjusting the area so that
+          // it is draw entirely inside 'rect'
+          int penWidth = qMax(1,painter.pen().width());
+
+          painter.drawRect(cursorRect.adjusted(penWidth/2,
+                                               penWidth/2,
+                                               - penWidth/2 - penWidth%2,
+                                               - penWidth/2 - penWidth%2));
+          if ( hasFocus() )
+            {
+              painter.fillRect(cursorRect, _cursorColor.isValid() ? _cursorColor : foregroundColor);
+
+              if ( !_cursorColor.isValid() )
+                {
+                  // invert the colour used to draw the text to ensure that the character at
+                  // the cursor position is readable
+                  invertCharacterColor = true;
+                }
+            }
+        }
+      else if ( _cursorShape == UnderlineCursor )
+        painter.drawLine(cursorRect.left(),
+                         cursorRect.bottom(),
+                         cursorRect.right(),
+                         cursorRect.bottom());
+      else if ( _cursorShape == IBeamCursor )
+        painter.drawLine(cursorRect.left(),
+                         cursorRect.top(),
+                         cursorRect.left(),
+                         cursorRect.bottom());
+
+    }
+}
+
+void TerminalView::drawCharacters(QPainter& painter,
+                                  const QRect& rect,
+                                  const QString& text,
+                                  const Character* style,
+                                  bool invertCharacterColor)
+{
+  // don't draw text which is currently blinking
+  if ( _blinking && (style->rendition & RE_BLINK) )
+    return;
+
+  // setup bold and underline
+  bool useBold = style->rendition & RE_BOLD || style->isBold(_colorTable) || font().bold();
+  bool useUnderline = style->rendition & RE_UNDERLINE || font().underline();
+
+  QFont font = painter.font();
+  if (    font.bold() != useBold
+          || font.underline() != useUnderline )
+    {
+      font.setBold(useBold);
+      font.setUnderline(useUnderline);
+      painter.setFont(font);
+    }
+
+  const CharacterColor& textColor = ( invertCharacterColor ? style->backgroundColor : style->foregroundColor );
+  const QColor color = textColor.color(_colorTable);
+
+  QPen pen = painter.pen();
+  if ( pen.color() != color )
+    {
+      pen.setColor(color);
+      painter.setPen(color);
+    }
+  // draw text
+  if ( isLineCharString(text) ) {
+      drawLineCharString(painter,rect.x(),rect.y(),text,style);
+    }
+  else
+    {
+      // the drawText(rect,flags,string) overload is used here with null flags
+      // instead of drawText(rect,string) because the (rect,string) overload causes
+      // the application's default layout direction to be used instead of
+      // the widget-specific layout direction, which should always be
+      // Qt::LeftToRight for this widget
+      painter.drawText(rect,0,text);
+    }
+}
+
+void TerminalView::drawTextFragment(QPainter& painter ,
+                                    const QRect& rect,
+                                    const QString& text,
+                                    const Character* style)
+{
+  painter.save();
+
+  // setup painter
+  const QColor foregroundColor = style->foregroundColor.color(_colorTable);
+  const QColor backgroundColor = style->backgroundColor.color(_colorTable);
+
+  // draw background if different from the display's background color
+  if ( backgroundColor != palette().background().color() )
+    drawBackground(painter,rect,backgroundColor);
+
+  // draw cursor shape if the current character is the cursor
+  // this may alter the foreground and background colors
+  bool invertCharacterColor = false;
+
+  if ( style->rendition & RE_CURSOR )
+    drawCursor(painter,rect,foregroundColor,backgroundColor,invertCharacterColor);
+  // draw text
+  drawCharacters(painter,rect,text,style,invertCharacterColor);
+
+  painter.restore();
+}
+
+void TerminalView::setRandomSeed(uint randomSeed) { _randomSeed = randomSeed; }
+uint TerminalView::randomSeed() const { return _randomSeed; }
+
+#if 0
+/*!
+    Set XIM Position
+*/
+void TerminalDisplay::setCursorPos(const int curx, const int cury)
+{
+  QPoint tL  = contentsRect().topLeft();
+  int    tLx = tL.x();
+  int    tLy = tL.y();
+
+  int xpos, ypos;
+  ypos = _topMargin + tLy + _fontHeight*(cury-1) + _fontAscent;
+  xpos = _leftMargin + tLx + _fontWidth*curx;
+  //setMicroFocusHint(xpos, ypos, 0, _fontHeight); //### ???
+  // fprintf(stderr, "x/y = %d/%d\txpos/ypos = %d/%d\n", curx, cury, xpos, ypos);
+  _cursorLine = cury;
+  _cursorCol = curx;
+}
+#endif
+
+// scrolls the image by 'lines', down if lines > 0 or up otherwise.
+//
+// the terminal emulation keeps track of the scrolling of the character
+// image as it receives input, and when the view is updated, it calls scrollImage()
+// with the final scroll amount.  this improves performance because scrolling the
+// display is much cheaper than re-rendering all the text for the
+// part of the image which has moved up or down.
+// Instead only new lines have to be drawn
+//
+// note:  it is important that the area of the display which is
+// scrolled aligns properly with the character grid -
+// which has a top left point at (_leftMargin,_topMargin) ,
+// a cell width of _fontWidth and a cell height of _fontHeight).
+void TerminalView::scrollImage(int lines , const QRect& screenWindowRegion)
+{
+  // if the flow control warning is enabled this will interfere with the
+  // scrolling optimisations and cause artifacts.  the simple solution here
+  // is to just disable the optimisation whilst it is visible
+  if ( _outputSuspendedLabel && _outputSuspendedLabel->isVisible() ) {
+      return;
+    }
+
+  // constrain the region to the display
+  // the bottom of the region is capped to the number of lines in the display's
+  // internal image - 2, so that the height of 'region' is strictly less
+  // than the height of the internal image.
+  QRect region = screenWindowRegion;
+  region.setBottom( qMin(region.bottom(),this->_lines-2) );
+
+  if (    lines == 0
+          || _image == 0
+          || !region.isValid()
+          || (region.top() + abs(lines)) >= region.bottom()
+          || this->_lines <= region.height() ) return;
+
+  QRect scrollRect;
+
+  void* firstCharPos = &_image[ region.top() * this->_columns ];
+  void* lastCharPos = &_image[ (region.top() + abs(lines)) * this->_columns ];
+
+  int top = _topMargin + (region.top() * _fontHeight);
+  int linesToMove = region.height() - abs(lines);
+  int bytesToMove = linesToMove *
+      this->_columns *
+      sizeof(Character);
+
+  Q_ASSERT( linesToMove > 0 );
+  Q_ASSERT( bytesToMove > 0 );
+
+  //scroll internal image
+  if ( lines > 0 )
+    {
+      // check that the memory areas that we are going to move are valid
+      Q_ASSERT( (char*)lastCharPos + bytesToMove <
+                (char*)(_image + (this->_lines * this->_columns)) );
+
+      Q_ASSERT( (lines*this->_columns) < _imageSize );
+
+      //scroll internal image down
+      memmove( firstCharPos , lastCharPos , bytesToMove );
+
+      //set region of display to scroll, making sure that
+      //the region aligns correctly to the character grid
+      scrollRect = QRect( _leftMargin , top,
+                          this->_usedColumns * _fontWidth ,
+                          linesToMove * _fontHeight );
+    }
+  else
+    {
+      // check that the memory areas that we are going to move are valid
+      Q_ASSERT( (char*)firstCharPos + bytesToMove <
+                (char*)(_image + (this->_lines * this->_columns)) );
+
+      //scroll internal image up
+      memmove( lastCharPos , firstCharPos , bytesToMove );
+
+      //set region of the display to scroll, making sure that
+      //the region aligns correctly to the character grid
+      QPoint topPoint( _leftMargin , top + abs(lines)*_fontHeight );
+
+      scrollRect = QRect( topPoint ,
+                          QSize( this->_usedColumns*_fontWidth ,
+                                 linesToMove * _fontHeight ));
+    }
+
+  //scroll the display vertically to match internal _image
+  scroll( 0 , _fontHeight * (-lines) , scrollRect );
+}
+
+QRegion TerminalView::hotSpotRegion() const
+{
+  QRegion region;
+  foreach( Filter::HotSpot* hotSpot , _filterChain->hotSpots() )
+    {
+      QRect rect;
+      rect.setLeft(hotSpot->startColumn());
+      rect.setTop(hotSpot->startLine());
+      rect.setRight(hotSpot->endColumn());
+      rect.setBottom(hotSpot->endLine());
+
+      region |= imageToWidget(rect);
+    }
+  return region;
+}
+
+void TerminalView::processFilters()
+{
+  if (!_screenWindow)
+    return;
+
+  QRegion preUpdateHotSpots = hotSpotRegion();
+
+  // use _screenWindow->getImage() here rather than _image because
+  // other classes may call processFilters() when this display's
+  // ScreenWindow emits a scrolled() signal - which will happen before
+  // updateImage() is called on the display and therefore _image is
+  // out of date at this point
+  _filterChain->setImage( _screenWindow->getImage(),
+                          _screenWindow->windowLines(),
+                          _screenWindow->windowColumns(),
+                          _screenWindow->getLineProperties() );
+  _filterChain->process();
+
+  QRegion postUpdateHotSpots = hotSpotRegion();
+
+  update( preUpdateHotSpots | postUpdateHotSpots );
+}
+
+void TerminalView::updateImage()
+{
+  if ( !_screenWindow )
+    return;
+  updateLineProperties();
+
+  // optimization - scroll the existing image where possible and
+  // avoid expensive text drawing for parts of the image that
+  // can simply be moved up or down
+  scrollImage( _screenWindow->scrollCount() ,
+               _screenWindow->scrollRegion() );
+  _screenWindow->resetScrollCount();
+
+  Character* const newimg = _screenWindow->getImage();
+  int lines = _screenWindow->windowLines() + 1;
+  int columns = _screenWindow->windowColumns();
+
+  setScroll( _screenWindow->currentLine() , _screenWindow->lineCount() );
+
+  if (!_image)
+    updateImageSize(); // Create _image
+
+  Q_ASSERT( this->_usedLines <= this->_lines );
+  Q_ASSERT( this->_usedColumns <= this->_columns );
+
+  int y,x,len;
+
+  QPoint tL  = contentsRect().topLeft();
+
+  int    tLx = tL.x();
+  int    tLy = tL.y();
+  _hasBlinker = false;
+
+  CharacterColor cf;       // undefined
+  CharacterColor _clipboard;       // undefined
+  int cr  = -1;   // undefined
+
+  const int linesToUpdate = qMin(this->_lines, qMax(0,lines  ));
+  const int columnsToUpdate = qMin(this->_columns,qMax(0,columns));
+
+  QChar *disstrU = new QChar[columnsToUpdate];
+  char *dirtyMask = new char[columnsToUpdate+2];
+  QRegion dirtyRegion;
+
+  // debugging variable, this records the number of lines that are found to
+  // be 'dirty' ( ie. have changed from the old _image to the new _image ) and
+  // which therefore need to be repainted
+  int dirtyLineCount = 0;
+
+  for (y = 0; y < linesToUpdate; y++)
+    {
+      const Character*       currentLine = &_image[y*this->_columns];
+      const Character* const newLine = &newimg[y*columns];
+
+      bool updateLine = false;
+
+      // The dirty mask indicates which characters need repainting. We also
+      // mark surrounding neighbours dirty, in case the character exceeds
+      // its cell boundaries
+      memset(dirtyMask, 0, columnsToUpdate+2);
+
+      for( x = 0 ; x < columnsToUpdate ; x++)
+        {
+          if ( newLine[x] != currentLine[x] )
+            {
+              dirtyMask[x] = true;
+            }
+        }
+
+      if (!_resizing) // not while _resizing, we're expecting a paintEvent
+        for (x = 0; x < columnsToUpdate; x++)
+          {
+            _hasBlinker |= (newLine[x].rendition & RE_BLINK);
+
+            // Start drawing if this character or the next one differs.
+            // We also take the next one into account to handle the situation
+            // where characters exceed their cell width.
+            if (dirtyMask[x])
+              {
+                quint16 c = newLine[x+0].character;
+                if ( !c )
+                  continue;
+                int p = 0;
+                disstrU[p++] = c; //fontMap(c);
+                bool lineDraw = isLineChar(c);
+                bool doubleWidth = (x+1 == columnsToUpdate) ? false : (newLine[x+1].character == 0);
+                cr = newLine[x].rendition;
+                _clipboard = newLine[x].backgroundColor;
+                if (newLine[x].foregroundColor != cf) cf = newLine[x].foregroundColor;
+                int lln = columnsToUpdate - x;
+                for (len = 1; len < lln; len++)
+                  {
+                    const Character& ch = newLine[x+len];
+
+                    if (!ch.character)
+                      continue; // Skip trailing part of multi-col chars.
+
+                    bool nextIsDoubleWidth = (x+len+1 == columnsToUpdate) ? false : (newLine[x+len+1].character == 0);
+
+                    if (  ch.foregroundColor != cf ||
+                          ch.backgroundColor != _clipboard ||
+                          ch.rendition != cr ||
+                          !dirtyMask[x+len] ||
+                          isLineChar(c) != lineDraw ||
+                          nextIsDoubleWidth != doubleWidth )
+                      break;
+
+                    disstrU[p++] = c; //fontMap(c);
+                  }
+
+                QString unistr(disstrU, p);
+
+                bool saveFixedFont = _fixedFont;
+                if (lineDraw)
+                  _fixedFont = false;
+                if (doubleWidth)
+                  _fixedFont = false;
+
+                updateLine = true;
+
+                _fixedFont = saveFixedFont;
+                x += len - 1;
+              }
+
+          }
+
+      //both the top and bottom halves of double height _lines must always be redrawn
+      //although both top and bottom halves contain the same characters, only
+      //the top one is actually
+      //drawn.
+      if (_lineProperties.count() > y)
+        updateLine |= (_lineProperties[y] & LINE_DOUBLEHEIGHT);
+
+      // if the characters on the line are different in the old and the new _image
+      // then this line must be repainted.
+      if (updateLine)
+        {
+          dirtyLineCount++;
+
+          // add the area occupied by this line to the region which needs to be
+          // repainted
+          QRect dirtyRect = QRect( _leftMargin+tLx ,
+                                   _topMargin+tLy+_fontHeight*y ,
+                                   _fontWidth * columnsToUpdate ,
+                                   _fontHeight );
+
+          dirtyRegion |= dirtyRect;
+        }
+
+      // replace the line of characters in the old _image with the
+      // current line of the new _image
+      memcpy((void*)currentLine,(const void*)newLine,columnsToUpdate*sizeof(Character));
+    }
+
+  // if the new _image is smaller than the previous _image, then ensure that the area
+  // outside the new _image is cleared
+  if ( linesToUpdate < _usedLines )
+    {
+      dirtyRegion |= QRect(   _leftMargin+tLx ,
+                              _topMargin+tLy+_fontHeight*linesToUpdate ,
+                              _fontWidth * this->_columns ,
+                              _fontHeight * (_usedLines-linesToUpdate) );
+    }
+  _usedLines = linesToUpdate;
+
+  if ( columnsToUpdate < _usedColumns )
+    {
+      dirtyRegion |= QRect(   _leftMargin+tLx+columnsToUpdate*_fontWidth ,
+                              _topMargin+tLy ,
+                              _fontWidth * (_usedColumns-columnsToUpdate) ,
+                              _fontHeight * this->_lines );
+    }
+  _usedColumns = columnsToUpdate;
+
+  dirtyRegion |= _inputMethodData.previousPreeditRect;
+
+  // update the parts of the display which have changed
+  update(dirtyRegion);
+
+  if ( _hasBlinker && !_blinkTimer->isActive()) _blinkTimer->start( BLINK_DELAY );
+  if (!_hasBlinker && _blinkTimer->isActive()) { _blinkTimer->stop(); _blinking = false; }
+  delete[] dirtyMask;
+  delete[] disstrU;
+
+}
+
+void TerminalView::showResizeNotification()
+{
+  if (_terminalSizeHint && isVisible())
+    {
+      if (_terminalSizeStartup) {
+          _terminalSizeStartup=false;
+          return;
+        }
+      if (!_resizeWidget)
+        {
+          _resizeWidget = new QLabel(("Size: XXX x XXX"), this);
+          _resizeWidget->setMinimumWidth(_resizeWidget->fontMetrics().width(("Size: XXX x XXX")));
+          _resizeWidget->setMinimumHeight(_resizeWidget->sizeHint().height());
+          _resizeWidget->setAlignment(Qt::AlignCenter);
+
+          _resizeWidget->setStyleSheet("background-color:palette(window);border-style:solid;border-width:1px;border-color:palette(dark)");
+
+          _resizeTimer = new QTimer(this);
+          _resizeTimer->setSingleShot(true);
+          connect(_resizeTimer, SIGNAL(timeout()), _resizeWidget, SLOT(hide()));
+
+        }
+      QString sizeStr;
+      sizeStr.sprintf("Size: %d x %d", _columns, _lines);
+      _resizeWidget->setText(sizeStr);
+      _resizeWidget->move((width()-_resizeWidget->width())/2,
+                          (height()-_resizeWidget->height())/2+20);
+      _resizeWidget->show();
+      _resizeTimer->start(1000);
+    }
+}
+
+void TerminalView::setBlinkingCursor(bool blink)
+{
+  _hasBlinkingCursor=blink;
+
+  if (blink && !_blinkCursorTimer->isActive())
+    _blinkCursorTimer->start(BLINK_DELAY);
+
+  if (!blink && _blinkCursorTimer->isActive())
+    {
+      _blinkCursorTimer->stop();
+      if (_cursorBlinking)
+        blinkCursorEvent();
+      else
+        _cursorBlinking = false;
+    }
+}
+
+void TerminalView::paintEvent( QPaintEvent* pe )
+{
+  updateImage();
+  //qDebug("%s %d paintEvent", __FILE__, __LINE__);
+  QPainter paint(this);
+  //qDebug("%s %d paintEvent %d %d", __FILE__, __LINE__, paint.window().top(), paint.window().right());
+
+  foreach (QRect rect, (pe->region() & contentsRect()).rects())
+    {
+      drawBackground(paint,rect,palette().background().color());
+      drawContents(paint, rect);
+    }
+  //    drawBackground(paint,contentsRect(),palette().background().color(),	true /* use opacity setting */);
+  //    drawContents(paint, contentsRect());
+  drawInputMethodPreeditString(paint,preeditRect());
+  paintFilters(paint);
+  paint.end();
+}
+
+QPoint TerminalView::cursorPosition() const
+{
+  if (_screenWindow)
+    return _screenWindow->cursorPosition();
+  else
+    return QPoint(0,0);
+}
+
+QRect TerminalView::preeditRect() const
+{
+  const int preeditLength = string_width(_inputMethodData.preeditString);
+
+  if ( preeditLength == 0 )
+    return QRect();
+
+  return QRect(_leftMargin + _fontWidth*cursorPosition().x(),
+               _topMargin + _fontHeight*cursorPosition().y(),
+               _fontWidth*preeditLength,
+               _fontHeight);
+}
+
+void TerminalView::drawInputMethodPreeditString(QPainter& painter , const QRect& rect)
+{
+  if ( _inputMethodData.preeditString.isEmpty() ) {
+      return;
+    }
+  const QPoint cursorPos = cursorPosition();
+
+  bool invertColors = false;
+  const QColor background = _colorTable[DEFAULT_BACK_COLOR].color;
+  const QColor foreground = _colorTable[DEFAULT_FORE_COLOR].color;
+  const Character* style = &_image[loc(cursorPos.x(),cursorPos.y())];
+
+  drawBackground(painter,rect,background);
+  drawCursor(painter,rect,foreground,background,invertColors);
+  drawCharacters(painter,rect,_inputMethodData.preeditString,style,invertColors);
+
+  _inputMethodData.previousPreeditRect = rect;
+}
+
+FilterChain* TerminalView::filterChain() const
+{
+  return _filterChain;
+}
+
+void TerminalView::paintFilters(QPainter& painter)
+{
+  //qDebug("%s %d paintFilters", __FILE__, __LINE__);
+
+  // get color of character under mouse and use it to draw
+  // lines for filters
+  QPoint cursorPos = mapFromGlobal(QCursor::pos());
+  int cursorLine;
+  int cursorColumn;
+  getCharacterPosition( cursorPos , cursorLine , cursorColumn );
+  Character cursorCharacter = _image[loc(cursorColumn,cursorLine)];
+
+  painter.setPen( QPen(cursorCharacter.foregroundColor.color(colorTable())) );
+
+  // iterate over hotspots identified by the display's currently active filters
+  // and draw appropriate visuals to indicate the presence of the hotspot
+
+  QList<Filter::HotSpot*> spots = _filterChain->hotSpots();
+  QListIterator<Filter::HotSpot*> iter(spots);
+  while (iter.hasNext())
+    {
+      Filter::HotSpot* spot = iter.next();
+
+      for ( int line = spot->startLine() ; line <= spot->endLine() ; line++ )
+        {
+          int startColumn = 0;
+          int endColumn = _columns-1; // TODO use number of _columns which are actually
+          // occupied on this line rather than the width of the
+          // display in _columns
+
+          // ignore whitespace at the end of the lines
+          while ( QChar(_image[loc(endColumn,line)].character).isSpace() && endColumn > 0 )
+            endColumn--;
+
+          // increment here because the column which we want to set 'endColumn' to
+          // is the first whitespace character at the end of the line
+          endColumn++;
+
+          if ( line == spot->startLine() )
+            startColumn = spot->startColumn();
+          if ( line == spot->endLine() )
+            endColumn = spot->endColumn();
+
+          // subtract one pixel from
+          // the right and bottom so that
+          // we do not overdraw adjacent
+          // hotspots
+          //
+          // subtracting one pixel from all sides also prevents an edge case where
+          // moving the mouse outside a link could still leave it underlined
+          // because the check below for the position of the cursor
+          // finds it on the border of the target area
+          QRect r;
+          r.setCoords( startColumn*_fontWidth + 1, line*_fontHeight + 1,
+                       endColumn*_fontWidth - 1, (line+1)*_fontHeight - 1 );
+
+          // Underline link hotspots
+          if ( spot->type() == Filter::HotSpot::Link )
+            {
+              QFontMetrics metrics(font());
+
+              // find the baseline (which is the invisible line that the characters in the font sit on,
+              // with some having tails dangling below)
+              int baseline = r.bottom() - metrics.descent();
+              // find the position of the underline below that
+              int underlinePos = baseline + metrics.underlinePos();
+
+              if ( r.contains( mapFromGlobal(QCursor::pos()) ) )
+                painter.drawLine( r.left() , underlinePos ,
+                                  r.right() , underlinePos );
+            }
+          // Marker hotspots simply have a transparent rectanglular shape
+          // drawn on top of them
+          else if ( spot->type() == Filter::HotSpot::Marker )
+            {
+              //TODO - Do not use a hardcoded colour for this
+              painter.fillRect(r,QBrush(QColor(255,0,0,120)));
+            }
+        }
+    }
+}
+void TerminalView::drawContents(QPainter &paint, const QRect &rect)
+{
+  //qDebug("%s %d drawContents and rect x=%d y=%d w=%d h=%d", __FILE__, __LINE__, rect.x(), rect.y(),rect.width(),rect.height());
+
+  QPoint topLeft  = contentsRect().topLeft();
+  // Take the topmost vertical position for the view.
+  int topLeftY = topLeft.y();
+
+  // In Konsole, the view has been centered. Don't do that here, since there
+  // are strange hopping effects during a resize when the view does no match
+  // exactly the widget width.
+  // int topLeftX = (_contentWidth - _usedColumns * _fontWidth) / 2;
+  int topLeftX = 0;
+
+  int leftUpperX = qMin(_usedColumns-1, qMax(0, qRound((rect.left()   - topLeftX - _leftMargin ) / _fontWidth)));
+  int leftUpperY = qMin(_usedLines-1,  qMax(0, qRound((rect.top()    - topLeftY - _topMargin  ) / _fontHeight)));
+  int rightLowerX = qMin(_usedColumns-1, qMax(0, qRound((rect.right()  - topLeftX - _leftMargin ) / _fontWidth)));
+  int rightLowerY = qMin(_usedLines-1,  qMax(0, qRound((rect.bottom() - topLeftY - _topMargin  ) / _fontHeight)));
+
+  const int bufferSize = _usedColumns;
+  QChar *disstrU = new QChar[bufferSize];
+  for (int y = leftUpperY; y <= rightLowerY; y++)
+    {
+      quint16 c = _image[loc(leftUpperX,y)].character;
+      int x = leftUpperX;
+      if(!c && x)
+        x--; // Search for start of multi-column character
+      for (; x <= rightLowerX; x++)
+        {
+          int len = 1;
+          int p = 0;
+
+          // is this a single character or a sequence of characters ?
+          if ( _image[loc(x,y)].rendition & RE_EXTENDED_CHAR )
+            {
+              // sequence of characters
+              ushort extendedCharLength = 0;
+              ushort* chars = ExtendedCharTable::instance
+                  .lookupExtendedChar(_image[loc(x,y)].charSequence,extendedCharLength);
+              for ( int index = 0 ; index < extendedCharLength ; index++ )
+                {
+                  Q_ASSERT( p < bufferSize );
+                  disstrU[p++] = chars[index];
+                }
+            }
+          else
+            {
+              // single character
+              c = _image[loc(x,y)].character;
+              if (c)
+                {
+                  Q_ASSERT( p < bufferSize );
+                  disstrU[p++] = c; //fontMap(c);
+                }
+            }
+
+          bool lineDraw = isLineChar(c);
+          bool doubleWidth = (_image[ qMin(loc(x,y)+1,_imageSize) ].character == 0);
+          CharacterColor currentForeground = _image[loc(x,y)].foregroundColor;
+          CharacterColor currentBackground = _image[loc(x,y)].backgroundColor;
+          quint8 currentRendition = _image[loc(x,y)].rendition;
+
+          while (x+len <= rightLowerX &&
+                 _image[loc(x+len,y)].foregroundColor == currentForeground &&
+                 _image[loc(x+len,y)].backgroundColor == currentBackground &&
+                 _image[loc(x+len,y)].rendition == currentRendition &&
+                 (_image[ qMin(loc(x+len,y)+1,_imageSize) ].character == 0) == doubleWidth &&
+                 isLineChar( c = _image[loc(x+len,y)].character) == lineDraw) // Assignment!
+            {
+              if (c)
+                disstrU[p++] = c; //fontMap(c);
+              if (doubleWidth) // assert((_image[loc(x+len,y)+1].character == 0)), see above if condition
+                len++; // Skip trailing part of multi-column character
+              len++;
+            }
+          if ((x+len < _usedColumns) && (!_image[loc(x+len,y)].character))
+            len++; // Adjust for trailing part of multi-column character
+
+          bool save__fixedFont = _fixedFont;
+          if (lineDraw)
+            _fixedFont = false;
+          if (doubleWidth)
+            _fixedFont = false;
+          QString unistr(disstrU,p);
+
+          if (y < _lineProperties.size())
+            {
+              if (_lineProperties[y] & LINE_DOUBLEWIDTH) {
+                  paint.scale(2,1);
+                }
+
+              if (_lineProperties[y] & LINE_DOUBLEHEIGHT) {
+                  paint.scale(1,2);
+                }
+            }
+
+          // calculate the area in which the text will be drawn
+          QRect textArea = QRect( _leftMargin+topLeftX+_fontWidth*x ,
+                                  _topMargin+topLeftY+_fontHeight*y ,
+                                  _fontWidth*len,
+                                  _fontHeight);
+
+          // move the calculated area to take account of scaling applied to the painter.
+          // the position of the area from the origin (0,0) is scaled
+          // by the opposite of whatever
+          // transformation has been applied to the painter.  this ensures that
+          // painting does actually start from textArea.topLeft()
+          // (instead of textArea.topLeft() * painter-scale)
+          QMatrix inverted = paint.matrix().inverted();
+          textArea.moveCenter( inverted.map(textArea.center()) );
+
+
+          //paint text fragment
+          drawTextFragment(	paint,
+                              textArea,
+                              unistr,
+                              &_image[loc(x,y)] );
+
+
+          _fixedFont = save__fixedFont;
+
+          //reset back to single-width, single-height _lines
+          paint.resetMatrix();
+
+          if (y < _lineProperties.size()-1)
+            {
+              //double-height _lines are represented by two adjacent _lines
+              //containing the same characters
+              //both _lines will have the LINE_DOUBLEHEIGHT attribute.
+              //If the current line has the LINE_DOUBLEHEIGHT attribute,
+              //we can therefore skip the next line
+              if (_lineProperties[y] & LINE_DOUBLEHEIGHT)
+                y++;
+            }
+          x += len - 1;
+        } // for x
+    } // for y
+  delete [] disstrU;
+}
+
+void TerminalView::blinkEvent()
+{
+  _blinking = !_blinking;
+
+  //TODO:  Optimise to only repaint the areas of the widget
+  // where there is blinking text
+  // rather than repainting the whole widget.
+  update();
+}
+
+QRect TerminalView::imageToWidget(const QRect& imageArea) const
+{
+  //qDebug("%s %d imageToWidget", __FILE__, __LINE__);
+  QRect result;
+  result.setLeft( _leftMargin + _fontWidth * imageArea.left() );
+  result.setTop( _topMargin + _fontHeight * imageArea.top() );
+  result.setWidth( _fontWidth * imageArea.width() );
+  result.setHeight( _fontHeight * imageArea.height() );
+
+  return result;
+}
+
+void TerminalView::blinkCursorEvent()
+{
+  _cursorBlinking = !_cursorBlinking;
+
+  QRect cursorRect = imageToWidget( QRect(cursorPosition(),QSize(1,1)) );
+
+  update(cursorRect);
+}
+
+/* ------------------------------------------------------------------------- */
+/*                                                                           */
+/*                                  Resizing                                 */
+/*                                                                           */
+/* ------------------------------------------------------------------------- */
+
+void TerminalView::resizeEvent(QResizeEvent*)
+{
+  updateImageSize();
+}
+
+void TerminalView::propagateSize()
+{
+  if (_isFixedSize)
+    {
+      setSize(_columns, _lines);
+      QWidget::setFixedSize(sizeHint());
+      parentWidget()->adjustSize();
+      parentWidget()->setFixedSize(parentWidget()->sizeHint());
+      return;
+    }
+  if (_image)
+    updateImageSize();
+}
+
+void TerminalView::updateImageSize()
+{
+  //qDebug("%s %d updateImageSize", __FILE__, __LINE__);
+  Character* oldimg = _image;
+  int oldlin = _lines;
+  int oldcol = _columns;
+
+  makeImage();
+
+
+  // copy the old image to reduce flicker
+  int lines = qMin(oldlin,_lines);
+  int columns = qMin(oldcol,_columns);
+
+  //qDebug("%s %d updateImageSize", __FILE__, __LINE__);
+  if (oldimg)
+    {
+      for (int line = 0; line < lines; line++)
+        {
+          memcpy((void*)&_image[_columns*line],
+                 (void*)&oldimg[oldcol*line],columns*sizeof(Character));
+        }
+      delete[] oldimg;
+    }
+
+  //qDebug("%s %d updateImageSize", __FILE__, __LINE__);
+  if (_screenWindow)
+    _screenWindow->setWindowLines(_lines);
+
+  _resizing = (oldlin!=_lines) || (oldcol!=_columns);
+
+  if ( _resizing )
+    {
+      //qDebug("%s %d updateImageSize", __FILE__, __LINE__);
+      showResizeNotification();
+      emit changedContentSizeSignal(_contentHeight, _contentWidth); // expose resizeEvent
+    }
+  //qDebug("%s %d updateImageSize", __FILE__, __LINE__);
+
+  _resizing = false;
+}
+
+//showEvent and hideEvent are reimplemented here so that it appears to other classes that the
+//display has been resized when the display is hidden or shown.
+//
+//this allows
+//TODO: Perhaps it would be better to have separate signals for show and hide instead of using
+//the same signal as the one for a content size change
+void TerminalView::showEvent(QShowEvent*)
+{
+  emit changedContentSizeSignal(_contentHeight,_contentWidth);
+}
+void TerminalView::hideEvent(QHideEvent*)
+{
+  emit changedContentSizeSignal(_contentHeight,_contentWidth);
+}
+
+/* ------------------------------------------------------------------------- */
+/*                                                                           */
+/*                                Scrollbar                                  */
+/*                                                                           */
+/* ------------------------------------------------------------------------- */
+
+void TerminalView::scrollBarPositionChanged(int)
+{
+  if ( !_screenWindow )
+    return;
+
+  _screenWindow->scrollTo( _scrollBar->value() );
+
+  // if the thumb has been moved to the bottom of the _scrollBar then set
+  // the display to automatically track new output,
+  // that is, scroll down automatically
+  // to how new _lines as they are added
+  const bool atEndOfOutput = (_scrollBar->value() == _scrollBar->maximum());
+  _screenWindow->setTrackOutput( atEndOfOutput );
+
+  updateImage();
+}
+
+void TerminalView::setScroll(int cursor, int slines)
+{
+  //qDebug("%s %d setScroll", __FILE__, __LINE__);
+  // update _scrollBar if the range or value has changed,
+  // otherwise return
+  //
+  // setting the range or value of a _scrollBar will always trigger
+  // a repaint, so it should be avoided if it is not necessary
+  if ( _scrollBar->minimum() == 0                 &&
+       _scrollBar->maximum() == (slines - _lines) &&
+       _scrollBar->value()   == cursor )
+    {
+      return;
+    }
+
+  disconnect(_scrollBar, SIGNAL(valueChanged(int)), this, SLOT(scrollBarPositionChanged(int)));
+  _scrollBar->setRange(0,slines - _lines);
+  _scrollBar->setSingleStep(1);
+  _scrollBar->setPageStep(_lines);
+  _scrollBar->setValue(cursor);
+  connect(_scrollBar, SIGNAL(valueChanged(int)), this, SLOT(scrollBarPositionChanged(int)));
+}
+
+void TerminalView::setScrollBarPosition(ScrollBarPosition position)
+{
+  if (_scrollbarLocation == position) {
+      //      return;
+    }
+
+  if ( position == NoScrollBar )
+    _scrollBar->hide();
+  else
+    _scrollBar->show();
+
+  _topMargin = _leftMargin = 1;
+  _scrollbarLocation = position;
+
+  propagateSize();
+  update();
+}
+
+void TerminalView::mousePressEvent(QMouseEvent* ev)
+{
+  if ( _possibleTripleClick && (ev->button()==Qt::LeftButton) ) {
+      mouseTripleClickEvent(ev);
+      return;
+    }
+
+  if ( !contentsRect().contains(ev->pos()) ) return;
+
+  if ( !_screenWindow ) return;
+
+  int charLine;
+  int charColumn;
+  getCharacterPosition(ev->pos(),charLine,charColumn);
+  QPoint pos = QPoint(charColumn,charLine);
+
+  if ( ev->button() == Qt::LeftButton)
+    {
+      _lineSelectionMode = false;
+      _wordSelectionMode = false;
+
+      emit isBusySelecting(true); // Keep it steady...
+      // Drag only when the Control key is hold
+      bool selected = false;
+
+      // The receiver of the testIsSelected() signal will adjust
+      // 'selected' accordingly.
+      //emit testIsSelected(pos.x(), pos.y(), selected);
+
+      selected =  _screenWindow->isSelected(pos.x(),pos.y());
+
+      if ((!_ctrlDrag || ev->modifiers() & Qt::ControlModifier) && selected ) {
+          // The user clicked inside selected text
+          dragInfo.state = diPending;
+          dragInfo.start = ev->pos();
+        }
+      else {
+          // No reason to ever start a drag event
+          dragInfo.state = diNone;
+
+          _preserveLineBreaks = !( ( ev->modifiers() & Qt::ControlModifier ) && !(ev->modifiers() & Qt::AltModifier) );
+          _columnSelectionMode = (ev->modifiers() & Qt::AltModifier) && (ev->modifiers() & Qt::ControlModifier);
+
+          if (_mouseMarks || (ev->modifiers() & Qt::ShiftModifier))
+            {
+              _screenWindow->clearSelection();
+
+              //emit clearSelectionSignal();
+              pos.ry() += _scrollBar->value();
+              _iPntSel = _pntSel = pos;
+              _actSel = 1; // left mouse button pressed but nothing selected yet.
+
+            }
+          else
+            {
+              emit mouseSignal( 0, charColumn + 1, charLine + 1 +_scrollBar->value() -_scrollBar->maximum() , 0);
+            }
+        }
+    }
+  else if ( ev->button() == Qt::MidButton )
+    {
+      if ( _mouseMarks || (!_mouseMarks && (ev->modifiers() & Qt::ShiftModifier)) )
+        emitSelection(true,ev->modifiers() & Qt::ControlModifier);
+      else
+        emit mouseSignal( 1, charColumn +1, charLine +1 +_scrollBar->value() -_scrollBar->maximum() , 0);
+    }
+  else if ( ev->button() == Qt::RightButton )
+    {
+      if (_mouseMarks || (ev->modifiers() & Qt::ShiftModifier))
+        {
+          emit configureRequest( this,
+                                 ev->modifiers() & (Qt::ShiftModifier|Qt::ControlModifier),
+                                 ev->pos()
+                                 );
+        }
+      else
+        emit mouseSignal( 2, charColumn +1, charLine +1 +_scrollBar->value() -_scrollBar->maximum() , 0);
+    }
+
+  QWidget::mousePressEvent (ev);
+}
+
+QList<QAction*> TerminalView::filterActions(const QPoint& position)
+{
+  int charLine, charColumn;
+  getCharacterPosition(position,charLine,charColumn);
+
+  Filter::HotSpot* spot = _filterChain->hotSpotAt(charLine,charColumn);
+
+  return spot ? spot->actions() : QList<QAction*>();
+}
+
+void TerminalView::mouseMoveEvent(QMouseEvent* ev)
+{
+  int charLine = 0;
+  int charColumn = 0;
+
+  getCharacterPosition(ev->pos(),charLine,charColumn);
+
+  // handle filters
+  // change link hot-spot appearance on mouse-over
+  Filter::HotSpot* spot = _filterChain->hotSpotAt(charLine,charColumn);
+  if ( spot && spot->type() == Filter::HotSpot::Link)
+    {
+      QRect previousHotspotArea = _mouseOverHotspotArea;
+      _mouseOverHotspotArea.setCoords( qMin(spot->startColumn() , spot->endColumn()) * _fontWidth,
+                                       spot->startLine() * _fontHeight,
+                                       qMax(spot->startColumn() , spot->endColumn()) * _fontHeight,
+                                       (spot->endLine()+1) * _fontHeight );
+
+      // display tooltips when mousing over links
+      // TODO: Extend this to work with filter types other than links
+      const QString& tooltip = spot->tooltip();
+      if ( !tooltip.isEmpty() )
+        {
+          QToolTip::showText( mapToGlobal(ev->pos()) , tooltip , this , _mouseOverHotspotArea );
+        }
+
+      update( _mouseOverHotspotArea | previousHotspotArea );
+    }
+  else if ( _mouseOverHotspotArea.isValid() )
+    {
+      update( _mouseOverHotspotArea );
+      // set hotspot area to an invalid rectangle
+      _mouseOverHotspotArea = QRect();
+    }
+
+  // for auto-hiding the cursor, we need mouseTracking
+  if (ev->buttons() == Qt::NoButton ) return;
+
+  // if the terminal is interested in mouse movements
+  // then emit a mouse movement signal, unless the shift
+  // key is being held down, which overrides this.
+  if (!_mouseMarks && !(ev->modifiers() & Qt::ShiftModifier))
+    {
+      int button = 3;
+      if (ev->buttons() & Qt::LeftButton)
+        button = 0;
+      if (ev->buttons() & Qt::MidButton)
+        button = 1;
+      if (ev->buttons() & Qt::RightButton)
+        button = 2;
+
+
+      emit mouseSignal( button,
+                        charColumn + 1,
+                        charLine + 1 +_scrollBar->value() -_scrollBar->maximum(),
+                        1 );
+
+      return;
+    }
+
+  if (dragInfo.state == diPending)
+    {
+      // we had a mouse down, but haven't confirmed a drag yet
+      // if the mouse has moved sufficiently, we will confirm
+
+      int distance = 10; //KGlobalSettings::dndEventDelay();
+      if ( ev->x() > dragInfo.start.x() + distance || ev->x() < dragInfo.start.x() - distance ||
+           ev->y() > dragInfo.start.y() + distance || ev->y() < dragInfo.start.y() - distance)
+        {
+          // we've left the drag square, we can start a real drag operation now
+          emit isBusySelecting(false); // Ok.. we can breath again.
+
+          _screenWindow->clearSelection();
+          doDrag();
+        }
+      return;
+    }
+  else if (dragInfo.state == diDragging)
+    {
+      // this isn't technically needed because mouseMoveEvent is suppressed during
+      // Qt drag operations, replaced by dragMoveEvent
+      return;
+    }
+
+  if (_actSel == 0) return;
+
+  // don't extend selection while pasting
+  if (ev->buttons() & Qt::MidButton) return;
+
+  extendSelection( ev->pos() );
+}
+
+#if 0
+void TerminalDisplay::setSelectionEnd()
+{
+  extendSelection( _configureRequestPoint );
+}
+#endif
+
+void TerminalView::extendSelection(const QPoint& position) {
+  QPoint pos = position;
+
+  if (!_screenWindow) {
+      return;
+    }
+
+  QPoint tL  = contentsRect().topLeft();
+  int    tLx = tL.x();
+  int    tLy = tL.y();
+  int    scroll = _scrollBar->value();
+
+  // we're in the process of moving the mouse with the left button pressed
+  // the mouse cursor will kept caught within the bounds of the text in
+  // this widget.
+
+  // Adjust position within text area bounds. See FIXME above.
+  if (pos.x() < tLx + _leftMargin) {
+      pos.setX(tLx + _leftMargin);
+    }
+  if (pos.x() > tLx + _leftMargin + _usedColumns * _fontWidth - 1) {
+      pos.setX(tLx + _leftMargin + _usedColumns * _fontWidth);
+    }
+  if (pos.y() < tLy + _topMargin) {
+      pos.setY(tLy + _topMargin);
+    }
+  if (pos.y() > tLy + _topMargin + _usedLines * _fontHeight - 1) {
+      pos.setY(tLy + _topMargin + _usedLines * _fontHeight - 1);
+    }
+
+  if (pos.y() == tLy + _topMargin + _usedLines * _fontHeight - 1) {
+      _scrollBar->setValue(_scrollBar->value() + yMouseScroll); // scrollforward
+    }
+  if (pos.y() == tLy + _topMargin) {
+      _scrollBar->setValue(_scrollBar->value() - yMouseScroll); // scrollback
+    }
+
+  int charColumn = 0;
+  int charLine = 0;
+  getCharacterPosition(pos, charLine, charColumn);
+
+  QPoint here = QPoint(charColumn, charLine);
+  QPoint ohere(here);
+  QPoint _iPntSelCorr = _iPntSel;
+  _iPntSelCorr.ry() -= _scrollBar->value();
+  QPoint _pntSelCorr = _pntSel;
+  _pntSelCorr.ry() -= _scrollBar->value();
+  bool swapping = false;
+
+  if (_wordSelectionMode) {
+      // Extend to word boundaries
+      int i = 0;
+      int selClass = 0;
+
+      bool left_not_right = (here.y() < _iPntSelCorr.y() ||
+                             (here.y() == _iPntSelCorr.y() && here.x() < _iPntSelCorr.x()));
+      bool old_left_not_right = (_pntSelCorr.y() < _iPntSelCorr.y() ||
+                                 (_pntSelCorr.y() == _iPntSelCorr.y() && _pntSelCorr.x() < _iPntSelCorr.x()));
+      swapping = left_not_right != old_left_not_right;
+
+      // Find left (left_not_right ? from here : from start)
+      QPoint left = left_not_right ? here : _iPntSelCorr;
+      i = loc(left.x(), left.y());
+      if (i >= 0 && i <= _imageSize) {
+          selClass = charClass(_image[i].character);
+          while (((left.x() > 0) || (left.y() > 0 && (_lineProperties[left.y() - 1] & LINE_WRAPPED)))
+                 && charClass(_image[i - 1].character) == selClass) {
+              i--;
+              if (left.x() > 0) {
+                  left.rx()--;
+                } else {
+                  left.rx() = _usedColumns - 1;
+                  left.ry()--;
+                }
+            }
+        }
+
+      // Find left (left_not_right ? from start : from here)
+      QPoint right = left_not_right ? _iPntSelCorr : here;
+      i = loc(right.x(), right.y());
+      if (i >= 0 && i <= _imageSize) {
+          selClass = charClass(_image[i].character);
+          while (((right.x() < _usedColumns - 1) || (right.y() < _usedLines - 1 && (_lineProperties[right.y()] & LINE_WRAPPED)))
+                 && charClass(_image[i + 1].character) == selClass) {
+              i++;
+              if (right.x() < _usedColumns - 1) {
+                  right.rx()++;
+                } else {
+                  right.rx() = 0;
+                  right.ry()++;
+                }
+            }
+        }
+
+      // Pick which is start (ohere) and which is extension (here)
+      if (left_not_right) {
+          here = left;
+          ohere = right;
+        } else {
+          here = right;
+          ohere = left;
+        }
+      ohere.rx()++;
+    }
+
+  if (_lineSelectionMode) {
+      // Extend to complete line
+      bool above_not_below = (here.y() < _iPntSelCorr.y());
+
+      QPoint above = above_not_below ? here : _iPntSelCorr;
+      QPoint below = above_not_below ? _iPntSelCorr : here;
+
+      while (above.y() > 0 && (_lineProperties[above.y() - 1] & LINE_WRAPPED)) {
+          above.ry()--;
+        }
+      while (below.y() < _usedLines - 1 && (_lineProperties[below.y()] & LINE_WRAPPED)) {
+          below.ry()++;
+        }
+
+      above.setX(0);
+      below.setX(_usedColumns - 1);
+
+      // Pick which is start (ohere) and which is extension (here)
+      if (above_not_below) {
+          here = above;
+          ohere = below;
+        } else {
+          here = below;
+          ohere = above;
+        }
+
+      QPoint newSelBegin = QPoint(ohere.x(), ohere.y());
+      swapping = !(_tripleSelBegin == newSelBegin);
+      _tripleSelBegin = newSelBegin;
+
+      ohere.rx()++;
+    }
+
+  int offset = 0;
+  if (!_wordSelectionMode && !_lineSelectionMode) {
+      int i = 0;
+      int selClass = 0;
+
+      bool left_not_right = (here.y() < _iPntSelCorr.y() ||
+                             (here.y() == _iPntSelCorr.y() && here.x() < _iPntSelCorr.x()));
+      bool old_left_not_right = (_pntSelCorr.y() < _iPntSelCorr.y() ||
+                                 (_pntSelCorr.y() == _iPntSelCorr.y() && _pntSelCorr.x() < _iPntSelCorr.x()));
+      swapping = left_not_right != old_left_not_right;
+
+      // Find left (left_not_right ? from here : from start)
+      QPoint left = left_not_right ? here : _iPntSelCorr;
+
+      // Find left (left_not_right ? from start : from here)
+      QPoint right = left_not_right ? _iPntSelCorr : here;
+      if (right.x() > 0 && !_columnSelectionMode) {
+          i = loc(right.x(), right.y());
+          if (i >= 0 && i <= _imageSize) {
+              selClass = charClass(_image[i - 1].character);
+              if (selClass == ' ') {
+                  while (right.x() < _usedColumns - 1 && charClass(_image[i + 1].character) == selClass && (right.y() < _usedLines - 1) &&
+                         !(_lineProperties[right.y()] & LINE_WRAPPED)) {
+                      i++;
+                      right.rx()++;
+                    }
+                  if (right.x() < _usedColumns - 1) {
+                      right = left_not_right ? _iPntSelCorr : here;
+                    } else {
+                      right.rx()++;  // will be balanced later because of offset=-1;
+                    }
+                }
+            }
+        }
+
+      // Pick which is start (ohere) and which is extension (here)
+      if (left_not_right) {
+          here = left;
+          ohere = right;
+          offset = 0;
+        } else {
+          here = right;
+          ohere = left;
+          offset = -1;
+        }
+    }
+
+  if ((here == _pntSelCorr) && (scroll == _scrollBar->value())) {
+      return; // not moved
+    }
+
+  if (here == ohere) {
+      return; // It's not left, it's not right.
+    }
+
+  if (_actSel < 2 || swapping) {
+      if (_columnSelectionMode && !_lineSelectionMode && !_wordSelectionMode) {
+          _screenWindow->setSelectionStart(ohere.x(), ohere.y(), true);
+        } else {
+          _screenWindow->setSelectionStart(ohere.x() - 1 - offset , ohere.y(), false);
+        }
+
+    }
+
+  _actSel = 2; // within selection
+  _pntSel = here;
+  _pntSel.ry() += _scrollBar->value();
+
+  if (_columnSelectionMode && !_lineSelectionMode && !_wordSelectionMode) {
+      _screenWindow->setSelectionEnd(here.x(), here.y());
+    } else {
+      _screenWindow->setSelectionEnd(here.x() + offset, here.y());
+    }
+}
+
+void TerminalView::mouseReleaseEvent(QMouseEvent* ev)
+{
+  if ( !_screenWindow )
+    return;
+
+  int charLine;
+  int charColumn;
+  getCharacterPosition(ev->pos(),charLine,charColumn);
+
+  if ( ev->button() == Qt::LeftButton)
+    {
+      emit isBusySelecting(false);
+      if(dragInfo.state == diPending)
+        {
+          // We had a drag event pending but never confirmed.  Kill selection
+          _screenWindow->clearSelection();
+          //emit clearSelectionSignal();
+        }
+      else
+        {
+          if ( _actSel > 1 )
+            {
+              setSelection(  _screenWindow->selectedText(_preserveLineBreaks)  );
+            }
+
+          _actSel = 0;
+
+          //FIXME: emits a release event even if the mouse is
+          //       outside the range. The procedure used in `mouseMoveEvent'
+          //       applies here, too.
+
+          if (!_mouseMarks && !(ev->modifiers() & Qt::ShiftModifier))
+            emit mouseSignal( 3, // release
+                              charColumn + 1,
+                              charLine + 1 +_scrollBar->value() -_scrollBar->maximum() , 0);
+        }
+      dragInfo.state = diNone;
+    }
+
+
+  if ( !_mouseMarks &&
+       ((ev->button() == Qt::RightButton && !(ev->modifiers() & Qt::ShiftModifier))
+        || ev->button() == Qt::MidButton) )
+    {
+      emit mouseSignal( 3,
+                        charColumn + 1,
+                        charLine + 1 +_scrollBar->value() -_scrollBar->maximum() ,
+                        0);
+    }
+
+  QWidget::mouseReleaseEvent(ev);
+}
+
+void TerminalView::getCharacterPosition(const QPoint& widgetPoint,int& line,int& column) const
+{
+
+  column = (widgetPoint.x() + _fontWidth/2 -contentsRect().left()-_leftMargin) / _fontWidth;
+  line = (widgetPoint.y()-contentsRect().top()-_topMargin) / _fontHeight;
+
+  if ( line < 0 )
+    line = 0;
+  if ( column < 0 )
+    column = 0;
+
+  if ( line >= _usedLines )
+    line = _usedLines-1;
+
+  // the column value returned can be equal to _usedColumns, which
+  // is the position just after the last character displayed in a line.
+  //
+  // this is required so that the user can select characters in the right-most
+  // column (or left-most for right-to-left input)
+  if ( column > _usedColumns )
+    column = _usedColumns;
+}
+
+void TerminalView::updateLineProperties()
+{
+  if ( !_screenWindow )
+    return;
+
+  _lineProperties = _screenWindow->getLineProperties();
+}
+
+void TerminalView::mouseDoubleClickEvent(QMouseEvent* ev)
+{
+  if ( ev->button() != Qt::LeftButton) return;
+  if ( !_screenWindow ) return;
+
+  int charLine = 0;
+  int charColumn = 0;
+
+  getCharacterPosition(ev->pos(),charLine,charColumn);
+
+  QPoint pos(charColumn,charLine);
+
+  // pass on double click as two clicks.
+  if (!_mouseMarks && !(ev->modifiers() & Qt::ShiftModifier))
+    {
+      // Send just _ONE_ click event, since the first click of the double click
+      // was already sent by the click handler
+      emit mouseSignal( 0,
+                        pos.x()+1,
+                        pos.y()+1 +_scrollBar->value() -_scrollBar->maximum(),
+                        0 ); // left button
+      return;
+    }
+
+  _screenWindow->clearSelection();
+  QPoint bgnSel = pos;
+  QPoint endSel = pos;
+  int i = loc(bgnSel.x(),bgnSel.y());
+  _iPntSel = bgnSel;
+  _iPntSel.ry() += _scrollBar->value();
+
+  _wordSelectionMode = true;
+
+  // find word boundaries...
+  int selClass = charClass(_image[i].character);
+  {
+    // find the start of the word
+    int x = bgnSel.x();
+    while ( ((x>0) || (bgnSel.y()>0 && (_lineProperties[bgnSel.y()-1] & LINE_WRAPPED) ))
+            && charClass(_image[i-1].character) == selClass )
+      {
+        i--;
+        if (x>0)
+          x--;
+        else
+          {
+            x=_usedColumns-1;
+            bgnSel.ry()--;
+          }
+      }
+
+    bgnSel.setX(x);
+    _screenWindow->setSelectionStart( bgnSel.x() , bgnSel.y() , false );
+
+    // find the end of the word
+    i = loc( endSel.x(), endSel.y() );
+    x = endSel.x();
+    while( ((x<_usedColumns-1) || (endSel.y()<_usedLines-1 && (_lineProperties[endSel.y()] & LINE_WRAPPED) ))
+           && charClass(_image[i+1].character) == selClass )
+      {
+        i++;
+        if (x<_usedColumns-1)
+          x++;
+        else
+          {
+            x=0;
+            endSel.ry()++;
+          }
+      }
+
+    endSel.setX(x);
+
+    // In word selection mode don't select @ (64) if at end of word.
+    if ( ( QChar( _image[i].character ) == '@' ) && ( ( endSel.x() - bgnSel.x() ) > 0 ) )
+      endSel.setX( x - 1 );
+
+
+    _actSel = 2; // within selection
+
+    _screenWindow->setSelectionEnd( endSel.x() , endSel.y() );
+
+    setSelection( _screenWindow->selectedText(_preserveLineBreaks) );
+  }
+
+  _possibleTripleClick=true;
+
+  QTimer::singleShot(QApplication::doubleClickInterval(),this,
+                     SLOT(tripleClickTimeout()));
+}
+
+void TerminalView::wheelEvent( QWheelEvent* ev )
+{
+  if (ev->orientation() != Qt::Vertical)
+    return;
+
+  if ( _mouseMarks )
+    _scrollBar->event(ev);
+  else
+    {
+      int charLine;
+      int charColumn;
+      getCharacterPosition( ev->pos() , charLine , charColumn );
+
+      emit mouseSignal( ev->delta() > 0 ? 4 : 5,
+                        charColumn + 1,
+                        charLine + 1 +_scrollBar->value() -_scrollBar->maximum() ,
+                        0);
+    }
+}
+
+void TerminalView::tripleClickTimeout()
+{
+  _possibleTripleClick=false;
+}
+
+void TerminalView::mouseTripleClickEvent(QMouseEvent* ev)
+{
+  if ( !_screenWindow ) return;
+
+  int charLine;
+  int charColumn;
+  getCharacterPosition(ev->pos(),charLine,charColumn);
+  _iPntSel = QPoint(charColumn,charLine);
+
+  _screenWindow->clearSelection();
+
+  _lineSelectionMode = true;
+  _wordSelectionMode = false;
+
+  _actSel = 2; // within selection
+  emit isBusySelecting(true); // Keep it steady...
+
+  while (_iPntSel.y()>0 && (_lineProperties[_iPntSel.y()-1] & LINE_WRAPPED) )
+    _iPntSel.ry()--;
+
+  if (_tripleClickMode == SelectForwardsFromCursor) {
+      // find word boundary start
+      int i = loc(_iPntSel.x(),_iPntSel.y());
+      int selClass = charClass(_image[i].character);
+      int x = _iPntSel.x();
+
+      while ( ((x>0) ||
+               (_iPntSel.y()>0 && (_lineProperties[_iPntSel.y()-1] & LINE_WRAPPED) )
+               )
+              && charClass(_image[i-1].character) == selClass )
+        {
+          i--;
+          if (x>0)
+            x--;
+          else
+            {
+              x=_columns-1;
+              _iPntSel.ry()--;
+            }
+        }
+
+      _screenWindow->setSelectionStart( x , _iPntSel.y() , false );
+      _tripleSelBegin = QPoint( x, _iPntSel.y() );
+    }
+  else if (_tripleClickMode == SelectWholeLine) {
+      _screenWindow->setSelectionStart( 0 , _iPntSel.y() , false );
+      _tripleSelBegin = QPoint( 0, _iPntSel.y() );
+    }
+
+  while (_iPntSel.y()<_lines-1 && (_lineProperties[_iPntSel.y()] & LINE_WRAPPED) )
+    _iPntSel.ry()++;
+
+  _screenWindow->setSelectionEnd( _columns - 1 , _iPntSel.y() );
+
+  setSelection(_screenWindow->selectedText(_preserveLineBreaks));
+
+  _iPntSel.ry() += _scrollBar->value();
+
+  emit tripleClicked( _screenWindow->selectedText( _preserveLineBreaks ) );
+}
+
+
+bool TerminalView::focusNextPrevChild( bool next )
+{
+  if (next)
+    return false; // This disables changing the active part in konqueror
+  // when pressing Tab
+  return QWidget::focusNextPrevChild( next );
+}
+
+
+int TerminalView::charClass(quint16 ch) const
+{
+  QChar qch=QChar(ch);
+  if ( qch.isSpace() ) return ' ';
+
+  if ( qch.isLetterOrNumber() || _wordCharacters.contains(qch, Qt::CaseInsensitive ) )
+    return 'a';
+
+  // Everything else is weird
+  return 1;
+}
+
+void TerminalView::setWordCharacters(const QString& wc)
+{
+  _wordCharacters = wc;
+}
+
+void TerminalView::setUsesMouse(bool on)
+{
+  _mouseMarks = on;
+  setCursor( _mouseMarks ? Qt::IBeamCursor : Qt::ArrowCursor );
+}
+bool TerminalView::usesMouse() const
+{
+  return _mouseMarks;
+}
+
+/* ------------------------------------------------------------------------- */
+/*                                                                           */
+/*                               Clipboard                                   */
+/*                                                                           */
+/* ------------------------------------------------------------------------- */
+
+#undef KeyPress
+
+void TerminalView::emitSelection(bool useXselection,bool appendReturn)
+{
+  if ( !_screenWindow )
+    return;
+
+  // Paste Clipboard by simulating keypress events
+  QString text = QApplication::clipboard()->text(useXselection ? QClipboard::Selection :
+                                                                 QClipboard::Clipboard);
+  if(appendReturn)
+    text.append("\r");
+  if ( ! text.isEmpty() )
+    {
+      text.replace("\n", "\r");
+      QKeyEvent e(QEvent::KeyPress, 0, Qt::NoModifier, text);
+      emit keyPressedSignal(&e); // expose as a big fat keypress event
+
+      _screenWindow->clearSelection();
+    }
+}
+
+void TerminalView::setSelection(const QString& t)
+{
+  QApplication::clipboard()->setText(t, QClipboard::Selection);
+}
+
+void TerminalView::copyClipboard()
+{
+  if ( !_screenWindow )
+    return;
+
+  QString text = _screenWindow->selectedText(_preserveLineBreaks);
+  QApplication::clipboard()->setText(text);
+}
+
+void TerminalView::pasteClipboard()
+{
+  emitSelection(false,false);
+}
+
+void TerminalView::pasteSelection()
+{
+  emitSelection(true,false);
+}
+
+/* ------------------------------------------------------------------------- */
+/*                                                                           */
+/*                                Keyboard                                   */
+/*                                                                           */
+/* ------------------------------------------------------------------------- */
+
+void TerminalView::keyPressEvent( QKeyEvent* event )
+{
+  //qDebug("%s %d keyPressEvent and key is %d", __FILE__, __LINE__, event->key());
+
+  bool emitKeyPressSignal = true;
+
+  // Keyboard-based navigation
+  if ( event->modifiers() == Qt::ShiftModifier )
+    {
+      bool update = true;
+
+      if ( event->key() == Qt::Key_PageUp )
+        {
+          //qDebug("%s %d pageup", __FILE__, __LINE__);
+          _screenWindow->scrollBy( ScreenWindow::ScrollPages , -1 );
+        }
+      else if ( event->key() == Qt::Key_PageDown )
+        {
+          //qDebug("%s %d pagedown", __FILE__, __LINE__);
+          _screenWindow->scrollBy( ScreenWindow::ScrollPages , 1 );
+        }
+      else if ( event->key() == Qt::Key_Up )
+        {
+          //qDebug("%s %d keyup", __FILE__, __LINE__);
+          _screenWindow->scrollBy( ScreenWindow::ScrollLines , -1 );
+        }
+      else if ( event->key() == Qt::Key_Down )
+        {
+          //qDebug("%s %d keydown", __FILE__, __LINE__);
+          _screenWindow->scrollBy( ScreenWindow::ScrollLines , 1 );
+        }
+      else {
+          update = false;
+        }
+
+      if ( update )
+        {
+          //qDebug("%s %d updating", __FILE__, __LINE__);
+          _screenWindow->setTrackOutput( _screenWindow->atEndOfOutput() );
+
+          updateLineProperties();
+          updateImage();
+
+          // do not send key press to terminal
+          emitKeyPressSignal = false;
+        }
+    }
+
+  _screenWindow->setTrackOutput( true );
+
+  _actSel=0; // Key stroke implies a screen update, so TerminalDisplay won't
+  // know where the current selection is.
+
+  if (_hasBlinkingCursor)
+    {
+      _blinkCursorTimer->start(BLINK_DELAY);
+      if (_cursorBlinking)
+        blinkCursorEvent();
+      else
+        _cursorBlinking = false;
+    }
+
+  if ( emitKeyPressSignal && !_readonly )
+    emit keyPressedSignal(event);
+
+  if (_readonly) {
+      event->ignore();
+    }
+  else {
+      event->accept();
+    }
+}
+
+void TerminalView::inputMethodEvent( QInputMethodEvent* event )
+{
+  QKeyEvent keyEvent(QEvent::KeyPress,0,Qt::NoModifier,event->commitString());
+  emit keyPressedSignal(&keyEvent);
+
+  _inputMethodData.preeditString = event->preeditString();
+  update(preeditRect() | _inputMethodData.previousPreeditRect);
+
+  event->accept();
+}
+QVariant TerminalView::inputMethodQuery( Qt::InputMethodQuery query ) const
+{
+  const QPoint cursorPos = _screenWindow ? _screenWindow->cursorPosition() : QPoint(0,0);
+  switch ( query )
+    {
+    case Qt::ImMicroFocus:
+      return imageToWidget(QRect(cursorPos.x(),cursorPos.y(),1,1));
+      break;
+    case Qt::ImFont:
+      return font();
+      break;
+    case Qt::ImCursorPosition:
+      // return the cursor position within the current line
+      return cursorPos.x();
+      break;
+    case Qt::ImSurroundingText:
+      {
+        // return the text from the current line
+        QString lineText;
+        QTextStream stream(&lineText);
+        PlainTextDecoder decoder;
+        decoder.begin(&stream);
+        decoder.decodeLine(&_image[loc(0,cursorPos.y())],_usedColumns,_lineProperties[cursorPos.y()]);
+        decoder.end();
+        return lineText;
+      }
+      break;
+    case Qt::ImCurrentSelection:
+      return QString();
+      break;
+    default:
+      break;
+    }
+
+  return QVariant();
+}
+
+bool TerminalView::event( QEvent *e )
+{
+  if ( e->type() == QEvent::ShortcutOverride )
+    {
+      QKeyEvent* keyEvent = static_cast<QKeyEvent *>( e );
+
+      // a check to see if keyEvent->text() is empty is used
+      // to avoid intercepting the press of the modifier key on its own.
+      //
+      // this is important as it allows a press and release of the Alt key
+      // on its own to focus the menu bar, making it possible to
+      // work with the menu without using the mouse
+      if ( (keyEvent->modifiers() == Qt::AltModifier) &&
+           !keyEvent->text().isEmpty() )
+        {
+          keyEvent->accept();
+          return true;
+        }
+
+      // Override any of the following shortcuts because
+      // they are needed by the terminal
+      int keyCode = keyEvent->key() | keyEvent->modifiers();
+      switch ( keyCode )
+        {
+        // list is taken from the QLineEdit::event() code
+        case Qt::Key_Tab:
+        case Qt::Key_Delete:
+        case Qt::Key_Home:
+        case Qt::Key_End:
+        case Qt::Key_Backspace:
+        case Qt::Key_Left:
+        case Qt::Key_Right:
+          keyEvent->accept();
+          return true;
+        }
+    }
+  return QWidget::event( e );
+}
+
+void TerminalView::setBellMode(int mode)
+{
+  _bellMode=mode;
+}
+
+void TerminalView::enableBell()
+{
+  _allowBell = true;
+}
+
+void TerminalView::swapColorTable()
+{
+  ColorEntry color = _colorTable[1];
+  _colorTable[1]=_colorTable[0];
+  _colorTable[0]= color;
+  _colorsInverted = !_colorsInverted;
+  update();
+}
+
+void TerminalView::clearImage()
+{
+  // We initialize _image[_imageSize] too. See makeImage()
+  for (int i = 0; i <= _imageSize; i++)
+    {
+      _image[i].character = ' ';
+      _image[i].foregroundColor = CharacterColor(COLOR_SPACE_DEFAULT,
+                                                 DEFAULT_FORE_COLOR);
+      _image[i].backgroundColor = CharacterColor(COLOR_SPACE_DEFAULT,
+                                                 DEFAULT_BACK_COLOR);
+      _image[i].rendition = DEFAULT_RENDITION;
+    }
+}
+
+void TerminalView::calcGeometry()
+{
+  _scrollBar->resize(QApplication::style()->pixelMetric(QStyle::PM_ScrollBarExtent),
+                     contentsRect().height());
+  switch(_scrollbarLocation)
+    {
+    case NoScrollBar :
+      _leftMargin = DEFAULT_LEFT_MARGIN;
+      _contentWidth = contentsRect().width() - 2 * DEFAULT_LEFT_MARGIN;
+      break;
+    case ScrollBarLeft :
+      _leftMargin = DEFAULT_LEFT_MARGIN + _scrollBar->width();
+      _contentWidth = contentsRect().width() - 2 * DEFAULT_LEFT_MARGIN - _scrollBar->width();
+      _scrollBar->move(contentsRect().topLeft());
+      break;
+    case ScrollBarRight:
+      _leftMargin = DEFAULT_LEFT_MARGIN;
+      _contentWidth = contentsRect().width()  - 2 * DEFAULT_LEFT_MARGIN - _scrollBar->width();
+      _scrollBar->move(contentsRect().topRight() - QPoint(_scrollBar->width()-1,0));
+      break;
+    }
+
+  _topMargin = DEFAULT_TOP_MARGIN;
+  _contentHeight = contentsRect().height() - 2 * DEFAULT_TOP_MARGIN + /* mysterious */ 1;
+
+  if (!_isFixedSize)
+    {
+      // ensure that display is always at least one column wide
+      _columns = qMax(1,qRound(_contentWidth / _fontWidth));
+      _usedColumns = qMin(_usedColumns,_columns);
+
+      // ensure that display is always at least one line high
+      _lines = qMax(1, qRound(_contentHeight / _fontHeight));
+      _usedLines = qMin(_usedLines,_lines);
+    }
+}
+
+void TerminalView::makeImage()
+{
+  //qDebug("%s %d makeImage", __FILE__, __LINE__);
+  calcGeometry();
+
+  // confirm that array will be of non-zero size, since the painting code
+  // assumes a non-zero array length
+  Q_ASSERT( _lines > 0 && _columns > 0 );
+  Q_ASSERT( _usedLines <= _lines && _usedColumns <= _columns );
+
+  _imageSize=_lines*_columns;
+
+  // We over-commit one character so that we can be more relaxed in dealing with
+  // certain boundary conditions: _image[_imageSize] is a valid but unused position
+  _image = new Character[_imageSize+1];
+
+  clearImage();
+}
+
+// calculate the needed size
+void TerminalView::setSize(int columns, int lines)
+{
+  //FIXME - Not quite correct, a small amount of additional space
+  // will be used for margins, the scrollbar etc.
+  // we need to allow for this so that '_size' does allow
+  // enough room for the specified number of columns and lines to fit
+
+  QSize newSize = QSize( columns * _fontWidth  ,
+                         lines * _fontHeight   );
+
+  if ( newSize != size() )
+    {
+      _size = newSize;
+      updateGeometry();
+    }
+}
+
+void TerminalView::setFixedSize(int cols, int lins)
+{
+  _isFixedSize = true;
+
+  //ensure that display is at least one line by one column in size
+  _columns = qMax(1,cols);
+  _lines = qMax(1,lins);
+  _usedColumns = qMin(_usedColumns,_columns);
+  _usedLines = qMin(_usedLines,_lines);
+
+  if (_image)
+    {
+      delete[] _image;
+      makeImage();
+    }
+  setSize(cols, lins);
+  QWidget::setFixedSize(_size);
+}
+
+QSize TerminalView::sizeHint() const
+{
+  return _size;
+}
+
+
+/* --------------------------------------------------------------------- */
+/*                                                                       */
+/* Drag & Drop                                                           */
+/*                                                                       */
+/* --------------------------------------------------------------------- */
+
+void TerminalView::dragEnterEvent(QDragEnterEvent* event)
+{
+  if (event->mimeData()->hasFormat("text/plain"))
+    event->acceptProposedAction();
+}
+
+void TerminalView::dropEvent(QDropEvent* event)
+{
+  //  KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
+
+  QString dropText;
+  /*  if (!urls.isEmpty())
+  {
+    for ( int i = 0 ; i < urls.count() ; i++ )
+    {
+        KUrl url = KIO::NetAccess::mostLocalUrl( urls[i] , 0 );
+        QString urlText;
+
+        if (url.isLocalFile())
+            urlText = url.path();
+        else
+            urlText = url.url();
+
+        // in future it may be useful to be able to insert file names with drag-and-drop
+        // without quoting them (this only affects paths with spaces in)
+        urlText = KShell::quoteArg(urlText);
+
+        dropText += urlText;
+
+        if ( i != urls.count()-1 )
+            dropText += ' ';
+    }
+  }
+  else
+  {
+    dropText = event->mimeData()->text();
+  }
+*/
+  if(event->mimeData()->hasFormat("text/plain"))
+    {
+      emit sendStringToEmu(dropText.toLocal8Bit());
+    }
+}
+
+void TerminalView::doDrag()
+{
+  dragInfo.state = diDragging;
+  dragInfo.dragObject = new QDrag(this);
+  QMimeData *mimeData = new QMimeData;
+  mimeData->setText(QApplication::clipboard()->text(QClipboard::Selection));
+  dragInfo.dragObject->setMimeData(mimeData);
+  dragInfo.dragObject->start(Qt::CopyAction);
+  // Don't delete the QTextDrag object.  Qt will delete it when it's done with it.
+}
+
+void TerminalView::outputSuspended(bool suspended)
+{
+  //create the label when this function is first called
+  if (!_outputSuspendedLabel)
+    {
+      //This label includes a link to an English language website
+      //describing the 'flow control' (Xon/Xoff) feature found in almost
+      //all terminal emulators.
+      //If there isn't a suitable article available in the target language the link
+      //can simply be removed.
+      _outputSuspendedLabel = new QLabel( ("<qt>Output has been "
+                                           "<a href=\"http://en.wikipedia.org/wiki/XON\">suspended</a>"
+                                           " by pressing Ctrl+S."
+                                           "  Press <b>Ctrl+Q</b> to resume.</qt>"),
+                                          this );
+
+      QPalette palette(_outputSuspendedLabel->palette());
+
+      palette.setColor(QPalette::Normal, QPalette::WindowText, QColor(Qt::white));
+      palette.setColor(QPalette::Normal, QPalette::Window, QColor(Qt::black));
+      //            KColorScheme::adjustForeground(palette,KColorScheme::NeutralText);
+      //		KColorScheme::adjustBackground(palette,KColorScheme::NeutralBackground);
+      _outputSuspendedLabel->setPalette(palette);
+      _outputSuspendedLabel->setAutoFillBackground(true);
+      _outputSuspendedLabel->setBackgroundRole(QPalette::Base);
+      _outputSuspendedLabel->setFont(QApplication::font());
+      _outputSuspendedLabel->setMargin(5);
+
+      //enable activation of "Xon/Xoff" link in label
+      _outputSuspendedLabel->setTextInteractionFlags(Qt::LinksAccessibleByMouse |
+                                                     Qt::LinksAccessibleByKeyboard);
+      _outputSuspendedLabel->setOpenExternalLinks(true);
+      _outputSuspendedLabel->setVisible(false);
+
+      _gridLayout->addWidget(_outputSuspendedLabel);
+      _gridLayout->addItem( new QSpacerItem(0,0,QSizePolicy::Expanding,
+                                            QSizePolicy::Expanding),
+                            1,0);
+
+    }
+
+  _outputSuspendedLabel->setVisible(suspended);
+}
+
+uint TerminalView::lineSpacing() const
+{
+  return _lineSpacing;
+}
+
+void TerminalView::setLineSpacing(uint i)
+{
+  _lineSpacing = i;
+  setVTFont(font()); // Trigger an update.
+}