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TerminalDisplay.cpp
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/*
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
Ported to Blackberry Playbook by BGmot <support@tm-k.com>, 2012
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 "TerminalDisplay.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 <fcntl.h>
#include "Filter.h"
#include "konsole_wcwidth.h"
#include "ScreenWindow.h"
#include "TerminalCharacterDecoder.h"
#include "ColorTables.h"
#include "mymenu.h"
#include "mymainwindow.h"
#include "myvk.h"
#include "mydevicetype.h"
extern bool bSymFlag;
extern CMyVirtualKeyboard *virtualKeyboard;
extern int masterFdG;
extern bool bCtrlFlag;
extern bool bShiftFlag;
extern CMyMenu *Menu;
extern CMyMainWindow *mainWindow;
extern uDeviceType dtDevice;
using namespace Konsole;
#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 TerminalDisplay::_antialiasText = true;
bool TerminalDisplay::HAVE_TRANSPARENCY = false;
/* ------------------------------------------------------------------------- */
/* */
/* 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* TerminalDisplay::screenWindow() const
{
return _screenWindow;
}
void TerminalDisplay::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* TerminalDisplay::colorTable() const
{
return _colorTable;
}
void TerminalDisplay::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 requiered 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 Konsole::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 TerminalDisplay::fontChange(const QFont&)
{
QFontMetrics fm(font());
//_fontHeight = fm.height() + _lineSpacing;
_fontHeight = mainWindow->nFontSize + _lineSpacing + 2;
// 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 = qRound((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 );
propagateSize();
update();
}
void TerminalDisplay::setVTFont(const QFont& f)
{
QFont font = f;
QFontMetrics metrics(font);
//if ( metrics.height() < height() && metrics.maxWidth() < width() )
if ( metrics.height()-1 < 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 TerminalDisplay::setFont(const QFont &)
{
// ignore font change request if not coming from konsole itself
}
/* ------------------------------------------------------------------------- */
/* */
/* Constructor / Destructor */
/* */
/* ------------------------------------------------------------------------- */
TerminalDisplay::TerminalDisplay(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)
,_bidiEnabled(false)
,_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)
,_flowControlWarningEnabled(false)
,_outputSuspendedLabel(0)
,_lineSpacing(0)
,_colorsInverted(false)
,_blendColor(qRgba(0,0,0,0xff))
,_filterChain(new TerminalImageFilterChain())
,_cursorShape(BlockCursor)
{
// 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(whiteonblack_color_table);
// setColorTable(blackonlightyellow_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 );
//set up a warning message when the user presses Ctrl+S to avoid confusion
connect( this,SIGNAL(flowControlKeyPressed(bool)),this,SLOT(outputSuspended(bool)) );
}
TerminalDisplay::~TerminalDisplay()
{
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 TerminalDisplay::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 );
}
//+++_fontWidth=15;//+++
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 TerminalDisplay::setKeyboardCursorShape(KeyboardCursorShape shape)
{
_cursorShape = shape;
}
TerminalDisplay::KeyboardCursorShape TerminalDisplay::keyboardCursorShape() const
{
return _cursorShape;
}
void TerminalDisplay::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 TerminalDisplay::keyboardCursorColor() const
{
return _cursorColor;
}
void TerminalDisplay::setOpacity(qreal opacity)
{
QColor color(_blendColor);
color.setAlphaF(opacity);
// enable automatic background filling to prevent the display
// flickering if there is no transparency
if ( color.alpha() == 255 )
{
setAutoFillBackground(true);
}
else
{
setAutoFillBackground(false);
}
_blendColor = color.rgba();
}
void TerminalDisplay::drawBackground(QPainter& painter, const QRect& rect, const QColor& backgroundColor, bool useOpacitySetting )
{
// 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();
if ( HAVE_TRANSPARENCY && qAlpha(_blendColor) < 0xff && useOpacitySetting )
{
QColor color(backgroundColor);
color.setAlpha(qAlpha(_blendColor));
painter.save();
painter.setCompositionMode(QPainter::CompositionMode_Source);
painter.fillRect(contentsRect, color);
painter.restore();
}
else {
painter.fillRect(contentsRect, backgroundColor);
}
painter.fillRect(scrollBarArea,_scrollBar->palette().background());
}
void TerminalDisplay::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 TerminalDisplay::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 TerminalDisplay::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, false /* do not use transparency */);
// 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 TerminalDisplay::setRandomSeed(uint randomSeed) { _randomSeed = randomSeed; }
uint TerminalDisplay::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 TerminalDisplay::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 TerminalDisplay::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 TerminalDisplay::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 TerminalDisplay::updateImage()
{
if ( !_screenWindow )
return;
// 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();
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;