octave-dspies: libgui/qterminal/libqterminal/unix/TerminalView.cpp comparison

comparison libgui/qterminal/libqterminal/unix/TerminalView.cpp @ 15681:018c46ef8a0c

maint: move everything under libgui/qterminal

author	Jordi Gutiérrez Hermoso <jordigh@octave.org>
date	Mon, 26 Nov 2012 12:07:51 -0500
parents	libqterminal/unix/TerminalView.cpp@a1bcffac7fa8
children	8e180eac78d0

comparison

equal deleted inserted replaced

-:6b1369106141
+:018c46ef8a0c
+/*
+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.
+}

Mercurial > octave-dspies

comparison libgui/qterminal/libqterminal/unix/TerminalView.cpp @ 15681:018c46ef8a0c