TerminalDisplay.cpp 83.8 KB
Newer Older
1
/*
2
    This file is part of Konsole, a terminal emulator for KDE.
3
    
4
    Copyright (C) 2006-7 by Robert Knight <robertknight@gmail.com>
5
    Copyright (C) 1997,1998 by Lars Doelle <lars.doelle@on-line.de>
6
    
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
    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.
*/
22

23
24
25
// Own
#include "TerminalDisplay.h"

Robert Knight's avatar
Robert Knight committed
26
// Qt
Dirk Mueller's avatar
Dirk Mueller committed
27
28
29
30
31
32
33
34
35
36
37
#include <QtGui/QApplication>
#include <QtGui/QBoxLayout>
#include <QtGui/QClipboard>
#include <QtGui/QKeyEvent>
#include <QtCore/QEvent>
#include <QtCore/QFile>
#include <QtGui/QGridLayout>
#include <QtGui/QLabel>
#include <QtGui/QLayout>
#include <QtGui/QPainter>
#include <QtGui/QPixmap>
38
#include <QtGui/QScrollBar>
Dirk Mueller's avatar
Dirk Mueller committed
39
40
41
#include <QtGui/QStyle>
#include <QtCore/QTimer>
#include <QtGui/QToolTip>
42

Robert Knight's avatar
Robert Knight committed
43
// KDE
44
#include <kshell.h>
Robert Knight's avatar
Robert Knight committed
45
#include <KCursor>
46
#include <kdebug.h>
Robert Knight's avatar
Robert Knight committed
47
#include <KLocale>
48
#include <KMenu>
Robert Knight's avatar
Robert Knight committed
49
50
51
52
53
54
#include <KNotification>
#include <KGlobalSettings>
#include <KShortcut>
#include <KIO/NetAccess>

// Konsole
Dirk Mueller's avatar
Dirk Mueller committed
55
#include <config-apps.h>
56
#include "Filter.h"
Robert Knight's avatar
Robert Knight committed
57
#include "konsole_wcwidth.h"
58
#include "ScreenWindow.h"
59

60
61
using namespace Konsole;

62
#ifndef loc
63
#define loc(X,Y) ((Y)*_columns+(X))
64
65
66
#endif

#define yMouseScroll 1
Waldo Bastian's avatar
Waldo Bastian committed
67
68
69
70

#define REPCHAR   "ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
                  "abcdefgjijklmnopqrstuvwxyz" \
                  "0123456789./+@"
71

72
73
// scroll increment used when dragging selection at top/bottom of window.

74
// static
75
76
bool TerminalDisplay::s_antialias = true;
bool TerminalDisplay::s_standalone = false;
77
bool TerminalDisplay::HAVE_TRANSPARENCY = false;
78

79
80
81
82
83
84
85
86
87
88
89
90
91
92
/* ------------------------------------------------------------------------- */
/*                                                                           */
/*                                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
*/

93
ScreenWindow* TerminalDisplay::screenWindow() const
94
95
96
{
    return _screenWindow;
}
97
void TerminalDisplay::setScreenWindow(ScreenWindow* window)
98
{
99
100
101
102
103
104
    // disconnect existing screen window if any
    if ( _screenWindow )
    {
        disconnect( _screenWindow , 0 , this , 0 );
    }

105
    _screenWindow = window;
106

107
108
    if ( window )
    {
109
#warning "The order here is not specified - does it matter whether updateImage or updateLineProperties comes first?"
110
111
112
        connect( _screenWindow , SIGNAL(outputChanged()) , this , SLOT(updateLineProperties()) );
        connect( _screenWindow , SIGNAL(outputChanged()) , this , SLOT(updateImage()) );
    }
113
114
}

115
const ColorEntry* TerminalDisplay::colorTable() const
116
{
117
  return _colorTable;
118
119
}

120
void TerminalDisplay::setColorTable(const ColorEntry table[])
121
{
Robert Knight's avatar
   
Robert Knight committed
122
123
  for (int i = 0; i < TABLE_COLORS; i++)
      _colorTable[i] = table[i];
124

125
  QPalette p = palette();
126
  p.setColor( backgroundRole(), _colorTable[DEFAULT_BACK_COLOR].color );
127
  setPalette( p );
128
129
130
131

  // We don't want the palette change to propagate to the scrollbar
  _scrollBar->setPalette( QApplication::palette() );  

132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
  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.
*/

153
static inline bool isLineChar(quint16 c) { return ((c & 0xFF80) == 0x2500);}
154
155
156
157
158
static inline bool isLineCharString(const QString& string)
{
		return (string.length() > 0) && (isLineChar(string.at(0).unicode()));
}
						
159

160
161
// assert for i in [0..31] : vt100extended(vt100_graphics[i]) == i.

162
unsigned short Konsole::vt100_graphics[32] =
163
164
165
166
167
168
169
{ // 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
};

170
void TerminalDisplay::fontChange(const QFont &)
171
172
{
  QFontMetrics fm(font());
173
  _fontHeight = fm.height() + _lineSpacing;
174

175
  // waba TerminalDisplay 1.123:
176
177
  // "Base character width on widest ASCII character. This prevents too wide
  //  characters in the presence of double wide (e.g. Japanese) characters."
Waldo Bastian's avatar
Waldo Bastian committed
178
  // Get the width from representative normal width characters
179
  _fontWidth = qRound((double)fm.width(REPCHAR)/(double)strlen(REPCHAR));
Waldo Bastian's avatar
Waldo Bastian committed
180

181
  _fixedFont = true;
182
  int fw = fm.width(REPCHAR[0]);
183
  for(unsigned int i=1; i< strlen(REPCHAR); i++){
Waldo Bastian's avatar
Waldo Bastian committed
184
    if (fw != fm.width(REPCHAR[i])){
185
      _fixedFont = false;
Waldo Bastian's avatar
Waldo Bastian committed
186
      break;
187
  }
188
  }
Stephan Kulow's avatar
Stephan Kulow committed
189

190
191
192
193
  if (_fontWidth>200) // don't trust unrealistic value, fallback to QFontMetrics::maxWidth()
    _fontWidth=fm.maxWidth();
  if (_fontWidth<1)
    _fontWidth=1;
194

195
  _fontAscent = fm.ascent();
196

197
  emit changedFontMetricSignal( _fontHeight, _fontWidth );
198
199
200
201
  propagateSize();
  update();
}

202
void TerminalDisplay::setVTFont(const QFont& f)
203
{
204
  QFont font = f;
Robert Knight's avatar
Robert Knight committed
205
206
207
208
209
210
211

  QFontMetrics metrics(font);

  if ( metrics.height() < height() && metrics.maxWidth() < width() )
  {
    if (!s_antialias)
        font.setStyleStrategy( QFont::NoAntialias );
Robert Knight's avatar
   
Robert Knight committed
212
213
214
215
216
217
 
    // 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);

Robert Knight's avatar
Robert Knight committed
218
219
220
    QFrame::setFont(font);
    fontChange(font);
  }
221
222
}

223
void TerminalDisplay::setFont(const QFont &)
224
225
226
227
228
229
230
231
232
233
{
  // ignore font change request if not coming from konsole itself
}

/* ------------------------------------------------------------------------- */
/*                                                                           */
/*                         Constructor / Destructor                          */
/*                                                                           */
/* ------------------------------------------------------------------------- */

234
TerminalDisplay::TerminalDisplay(QWidget *parent)
235
:QFrame(parent)
236
,_screenWindow(0)
237
238
239
240
241
242
243
244
245
246
247
248
,_allowBell(true)
,_gridLayout(0)
,_fontHeight(1)
,_fontWidth(1)
,_fontAscent(1)
,_lines(1)
,_columns(1)
,_usedLines(1)
,_usedColumns(1)
,_contentHeight(1)
,_contentWidth(1)
,_image(0)
249
,_randomSeed(0)
250
251
252
253
254
255
256
257
258
259
260
,_resizing(false)
,_terminalSizeHint(false)
,_terminalSizeStartup(true)
,_bidiEnabled(false)
,_actSel(0)
,_wordSelectionMode(false)
,_lineSelectionMode(false)
,_preserveLineBreaks(true)
,_columnSelectionMode(false)
,_scrollbarLocation(SCROLLBAR_NONE)
,_wordCharacters(":@-./_~")
261
,_bellMode(BELL_SYSTEM)
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
,_blinking(false)
,_cursorBlinking(false)
,_hasBlinkingCursor(false)
,_ctrlDrag(false)
,_cutToBeginningOfLine(false)
,_isPrinting(false)
,_printerFriendly(false)
,_printerBold(false)
,_isFixedSize(false)
,_drop(0)
,_possibleTripleClick(false)
,_resizeWidget(0)
,_resizeLabel(0)
,_resizeTimer(0)
,_outputSuspendedLabel(0)
,_lineSpacing(0)
,_colorsInverted(false)
,_rimX(1)
,_rimY(1)
,_imPreeditText(QString())
,_imPreeditLength(0)
,_imStart(0)
,_imStartLine(0)
,_imEnd(0)
,_imSelStart(0)
,_imSelEnd(0)
,_cursorLine(0)
,_cursorCol(0)
,_isIMEdit(false)
,_blendColor(qRgba(0,0,0,0xff))
292
,_filterChain(new TerminalImageFilterChain())
293
,_cursorShape(BlockCursor)
294
{
295

296
  // The offsets are not yet calculated.
297
  // Do not calculate these too often to be more smoothly when resizing
298
  // konsole in opaque mode.
299
  _bY = _bX = 1;
300

301
302
  // 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
303
  _scrollBar = new QScrollBar(this);
304
  setScroll(0,0); 
305
306
  _scrollBar->setCursor( Qt::ArrowCursor );
  connect(_scrollBar, SIGNAL(valueChanged(int)), this, SLOT(scrollChanged(int)));
307

308
309
310
311
  _blinkTimer   = new QTimer(this);
  connect(_blinkTimer, SIGNAL(timeout()), this, SLOT(blinkEvent()));
  _blinkCursorTimer   = new QTimer(this);
  connect(_blinkCursorTimer, SIGNAL(timeout()), this, SLOT(blinkCursorEvent()));
312

Robert Knight's avatar
   
Robert Knight committed
313
  setUsesMouse(true);
314
  setColorTable(base_color_table); 
315
316
317

  KCursor::setAutoHideCursor( this, true );

318
319
  setMouseTracking(true);

Robert Knight's avatar
   
Robert Knight committed
320
  // Init DnD 
321
  setAcceptDrops(true); // attempt
322
  dragInfo.state = diNone;
323

324
  setFocusPolicy( Qt::WheelFocus );
Kazuki Ohta's avatar
Kazuki Ohta committed
325
  // im
326
  setAttribute(Qt::WA_InputMethodEnabled, true);
Stephan Kulow's avatar
Stephan Kulow committed
327

Robert Knight's avatar
Robert Knight committed
328
  // this is an important optimization, it tells Qt
329
330
  // that TerminalDisplay will handle repainting its entire area.
  setAttribute(Qt::WA_OpaquePaintEvent);
331

332
333
  _gridLayout = new QGridLayout(this);
  _gridLayout->setMargin(0);
334

335
  setLayout( _gridLayout ); 
336
  setLineWidth(0);
337
338
339

  //set up a warning message when the user presses Ctrl+S to avoid confusion
  connect( this,SIGNAL(flowControlKeyPressed(bool)),this,SLOT(outputSuspended(bool)) );
340
341
}

342
TerminalDisplay::~TerminalDisplay()
343
344
{
  qApp->removeEventFilter( this );
345
  
346
  delete[] _image;
347

348
349
  delete _gridLayout;
  delete _outputSuspendedLabel;
350
  delete _filterChain;
351
352
353
354
355
356
357
358
}

/* ------------------------------------------------------------------------- */
/*                                                                           */
/*                             Display Operations                            */
/*                                                                           */
/* ------------------------------------------------------------------------- */

359
360
361
362
363
/**
 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.
Stephan Kulow's avatar
Stephan Kulow committed
364

365
366
367
368
369
370
371
372
373
374
375
 Then, the pixels basically have the following interpretation:
 _|||_
 -...-
 -...-
 -...-
 _|||_

where _ = none
      | = vertical line.
      - = horizontal line.
 */
Stephan Kulow's avatar
Stephan Kulow committed
376

377
378
379
380
381
382

enum LineEncode
{
    TopL  = (1<<1),
    TopC  = (1<<2),
    TopR  = (1<<3),
Stephan Kulow's avatar
Stephan Kulow committed
383

384
385
386
387
388
    LeftT = (1<<5),
    Int11 = (1<<6),
    Int12 = (1<<7),
    Int13 = (1<<8),
    RightT = (1<<9),
Stephan Kulow's avatar
Stephan Kulow committed
389

390
391
392
393
394
    LeftC = (1<<10),
    Int21 = (1<<11),
    Int22 = (1<<12),
    Int23 = (1<<13),
    RightC = (1<<14),
Stephan Kulow's avatar
Stephan Kulow committed
395

396
397
398
399
400
    LeftB = (1<<15),
    Int31 = (1<<16),
    Int32 = (1<<17),
    Int33 = (1<<18),
    RightB = (1<<19),
Stephan Kulow's avatar
Stephan Kulow committed
401

402
403
    BotL  = (1<<21),
    BotC  = (1<<22),
Dirk Mueller's avatar
Dirk Mueller committed
404
    BotR  = (1<<23)
405
406
};

407
#include "LineFont.h"
408
409
410
411
412
413
414
415
416

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;

417
    quint32 toDraw = LineChars[code];
Stephan Kulow's avatar
Stephan Kulow committed
418

419
    //Top _lines:
420
421
422
423
424
425
426
    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);

427
    //Bot _lines:
428
429
430
431
432
433
434
    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);

435
    //Left _lines:
436
437
438
439
440
441
442
    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);

443
    //Right _lines:
444
445
446
447
448
449
    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);
Stephan Kulow's avatar
Stephan Kulow committed
450

451
452
453
454
455
456
457
    //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);
Stephan Kulow's avatar
Stephan Kulow committed
458

459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
    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);

}

475
void TerminalDisplay::drawLineCharString(	QPainter& painter, int x, int y, const QString& str, 
476
									const Character* attributes)
477
478
479
{
		const QPen& currentPen = painter.pen();
		
480
		if ( attributes->rendition & RE_BOLD )
481
482
483
484
485
486
487
488
489
490
		{
			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])
491
            	drawLineChar(painter, x + (_fontWidth*i), y, _fontWidth, _fontHeight, code);
492
493
494
495
496
		}

		painter.setPen( currentPen );
}

497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
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;
}
520

521
522
523
524
void TerminalDisplay::setOpacity(qreal opacity)
{
    QColor color(_blendColor);
    color.setAlphaF(opacity);
525
526
527
528
529
530
531
532
533
534
535
536

    // enable automatic background filling to prevent the display
    // flickering if there is no transparency
    /*if ( color.alpha() == 255 ) 
    {
        setAutoFillBackground(true);
    }
    else
    {
        setAutoFillBackground(false);
    }*/

537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
    _blendColor = color.rgba();
}

void TerminalDisplay::drawBackground(QPainter& painter, const QRect& rect, const QColor& backgroundColor)
{
        if ( HAVE_TRANSPARENCY && qAlpha(_blendColor) < 0xff ) 
        {
            QColor color(backgroundColor);
            color.setAlpha(qAlpha(_blendColor));

            painter.save();
            painter.setCompositionMode(QPainter::CompositionMode_Source);
            painter.fillRect(rect, color);
            painter.restore();
        } 
        else
            painter.fillRect(rect, backgroundColor);
}

556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
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);

       if ( _cursorShape == BlockCursor )
       {
            painter.drawRect(cursorRect);
            if ( hasFocus() )
            {
                painter.fillRect(cursorRect, _cursorColor.isValid() ? _cursorColor : foregroundColor);
576
577
578
579
580
581
582
            
                if ( !_cursorColor.isValid() )
                {
                    // invert the colour used to draw the text to ensure that the character at
                    // the cursor position is readable
                    invertCharacterColor = true;
                }
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
            }
       }
       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;
   
Robert Knight's avatar
   
Robert Knight committed
609
    // setup bold and underline
610
    bool useBold = style->rendition & RE_BOLD || style->isBold(_colorTable);
Robert Knight's avatar
   
Robert Knight committed
611
612
    bool useUnderline = style->rendition & RE_UNDERLINE;

613
    QFont font = painter.font();
Robert Knight's avatar
   
Robert Knight committed
614
615
    if (    font.bold() != useBold 
         || font.underline() != useUnderline )
616
617
    {
       font.setBold(useBold);
Robert Knight's avatar
   
Robert Knight committed
618
       font.setUnderline(useUnderline);
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
       painter.setFont(font);
    }

    // setup pen
    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
        painter.drawText(rect,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
651
    if ( backgroundColor != palette().background().color() )
652
653
654
655
656
657
658
659
660
661
662
663
664
665
        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();
}

666
667
668
void TerminalDisplay::setRandomSeed(uint randomSeed) { _randomSeed = randomSeed; }
uint TerminalDisplay::randomSeed() const { return _randomSeed; }

Waldo Bastian's avatar
Waldo Bastian committed
669
670
671
/*!
    Set XIM Position
*/
672
void TerminalDisplay::setCursorPos(const int curx, const int cury)
Waldo Bastian's avatar
Waldo Bastian committed
673
674
675
676
677
678
{
    QPoint tL  = contentsRect().topLeft();
    int    tLx = tL.x();
    int    tLy = tL.y();

    int xpos, ypos;
679
680
681
    ypos = _bY + tLy + _fontHeight*(cury-1) + _fontAscent;
    xpos = _bX + tLx + _fontWidth*curx;
    //setMicroFocusHint(xpos, ypos, 0, _fontHeight); //### ???
Waldo Bastian's avatar
Waldo Bastian committed
682
    // fprintf(stderr, "x/y = %d/%d\txpos/ypos = %d/%d\n", curx, cury, xpos, ypos);
683
684
    _cursorLine = cury;
    _cursorCol = curx;
Waldo Bastian's avatar
Waldo Bastian committed
685
686
}

687
// scrolls the image by 'lines', down if lines > 0 or up otherwise.
688
//
689
// the terminal emulation keeps track of the scrolling of the character 
690
// image as it receives input, and when the view is updated, it calls scrollImage() 
691
// with the final scroll amount.  this improves performance because scrolling the 
692
693
694
// 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
695
//
696
697
698
// 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 (_bX,_bY) , 
699
// a cell width of _fontWidth and a cell height of _fontHeight).    
700
void TerminalDisplay::scrollImage(int lines , const QRect& screenWindowRegion)
701
{
702
703
704
705
706
707
708
    // 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) ); 

709
    if (    lines == 0 
710
711
712
713
714
715
         || _image == 0
         || !region.isValid() 
         || (region.top() + abs(lines)) >= region.bottom() 
         || this->_lines <= region.height() ) return;

   
716
717
718

    QRect scrollRect;

719
720
721
722
723
    //qDebug() << "Scrolled region: top =" << region.top() 
    //         << ", bottom =" << region.bottom()
    //         << ", height =" << region.height() << "lines.  Image height ="
    //         << this->_usedLines << "lines"
    //         << ", scroll =" << lines << "lines";
724

725
726
    void* firstCharPos = &_image[ region.top() * this->_columns ];
    void* lastCharPos = &_image[ (region.top() + abs(lines)) * this->_columns ];
727
728
729
730

    int top = _bY + (region.top() * _fontHeight);
    int linesToMove = region.height() - abs(lines);
    int bytesToMove = linesToMove * 
731
                      this->_columns *
732
733
734
735
736
                      sizeof(Character);

    Q_ASSERT( linesToMove > 0 );
    Q_ASSERT( bytesToMove > 0 );

737
    //scroll internal image
738
    if ( lines > 0 )
739
    {
740
741
        // check that the memory areas that we are going to move are valid
        Q_ASSERT( (char*)lastCharPos + bytesToMove < 
742
                  (char*)(_image + (this->_lines * this->_columns)) );
743
        
744
        Q_ASSERT( (lines*this->_columns) < _imageSize ); 
745

746
        //scroll internal image down
747
748
        memmove( firstCharPos , lastCharPos , bytesToMove ); 
      
749
750
        //set region of display to scroll, making sure that
        //the region aligns correctly to the character grid 
751
        scrollRect = QRect( _bX , top, 
752
                            this->_usedColumns * _fontWidth , 
753
                            linesToMove * _fontHeight );
754
755
756
    }
    else
    {
757
758
        // check that the memory areas that we are going to move are valid
        Q_ASSERT( (char*)firstCharPos + bytesToMove < 
759
                  (char*)(_image + (this->_lines * this->_columns)) );
760
761

        //scroll internal image up
762
763
        memmove( lastCharPos , firstCharPos , bytesToMove ); 
     
764
765
        //set region of the display to scroll, making sure that
        //the region aligns correctly to the character grid
766
        QPoint topPoint( _bX , top + abs(lines)*_fontHeight );
767

768
        scrollRect = QRect( topPoint ,
769
                     QSize( this->_usedColumns*_fontWidth , 
770
                            linesToMove * _fontHeight ));
771
772
    }

773
    //scroll the display vertically to match internal _image
774
    scroll( 0 , _fontHeight * (-lines) , scrollRect );
775
}
776

777
void TerminalDisplay::processFilters() 
778
{
779
780
781
782
783
    QTime t;
    t.start();

    _filterChain->setImage(_image,_lines,_columns);

Robert Knight's avatar
   
Robert Knight committed
784
    //qDebug() << "Setup filters in" << t.elapsed() << "ms.";
785

786
    _filterChain->process();
787

Robert Knight's avatar
   
Robert Knight committed
788
    //qDebug() << "Processed filters in" << t.elapsed() << "ms.";
789
790
}

791
void TerminalDisplay::updateImage() 
792
{
793
794
795
  if ( !_screenWindow )
      return;

796
797
  // optimization - scroll the existing image where possible and 
  // avoid expensive text drawing for parts of the image that 
Robert Knight's avatar
   
Robert Knight committed
798
  // can simply be moved up or down
799
800
  scrollImage( _screenWindow->scrollCount() ,
               _screenWindow->scrollRegion() );
801
802
  _screenWindow->resetScrollCount();

803
  Character* const newimg = _screenWindow->getImage();
804
805
  int lines = _screenWindow->windowLines();
  int columns = _screenWindow->windowColumns();
806
807
808

  setScroll( _screenWindow->currentLine() , _screenWindow->lineCount() );

809
810
  if (!_image)
     updateImageSize(); // Create _image
811

812
813
  Q_ASSERT( this->_usedLines <= this->_lines );
  Q_ASSERT( this->_usedColumns <= this->_columns );
814

815
  int y,x,len;
816
817
818
819

  QPoint tL  = contentsRect().topLeft();
  int    tLx = tL.x();
  int    tLy = tL.y();
820
  _hasBlinker = false;
821

822
  CharacterColor cf;       // undefined
823
  CharacterColor _clipboard;       // undefined
824
  int cr  = -1;   // undefined
825

826
827
  const int linesToUpdate = qMin(this->_lines, qMax(0,lines  ));
  const int columnsToUpdate = qMin(this->_columns,qMax(0,columns));
828

829
  QChar *disstrU = new QChar[columnsToUpdate];
830
  char *dirtyMask = new char[columnsToUpdate+2]; 
831
  QRegion dirtyRegion;
832

833
  // debugging variable, this records the number of lines that are found to
834
  // be 'dirty' ( ie. have changed from the old _image to the new _image ) and
Robert Knight's avatar
   
Robert Knight committed
835
  // which therefore need to be repainted
836
837
  int dirtyLineCount = 0;

838
  for (y = 0; y < linesToUpdate; y++)
839
  {
840
    const Character*       currentLine = &_image[y*this->_columns];
841
    const Character* const newLine = &newimg[y*columns];
842

843
844
    bool updateLine = false;
    
845
    // The dirty mask indicates which characters need repainting. We also
Waldo Bastian's avatar
Waldo Bastian committed
846
847
    // mark surrounding neighbours dirty, in case the character exceeds
    // its cell boundaries
848
    memset(dirtyMask, 0, columnsToUpdate+2);
Waldo Bastian's avatar
Waldo Bastian committed
849
    // Two extra so that we don't have to have to care about start and end conditions
850
    for (x = 0; x < columnsToUpdate; x++)
Waldo Bastian's avatar
Waldo Bastian committed
851
    {
852
853
854
855
856
857
	if ( ( (_imPreeditLength > 0) && 
           ( ( _imStartLine == y ) && 
             ( ( _imStart < _imEnd ) && 
               ( ( x > _imStart ) ) && 
               ( x < _imEnd ) )
              || ( ( _imSelStart < _imSelEnd ) && ( ( x > _imSelStart ) ) ) ) )
858
            || newLine[x] != currentLine[x])
Waldo Bastian's avatar
Waldo Bastian committed
859
860
861
862
863
      {
         dirtyMask[x] = dirtyMask[x+1] = dirtyMask[x+2] = 1;
      }
    }
    dirtyMask++; // Position correctly
864

865
    if (!_resizing) // not while _resizing, we're expecting a paintEvent
866
    for (x = 0; x < columnsToUpdate; x++)
867
    {
868
      _hasBlinker |= (newLine[x].rendition & RE_BLINK);
869
    
Waldo Bastian's avatar
Waldo Bastian committed
870
871
872
873
      // 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])
874
      {
875
        quint16 c = newLine[x+0].character;
876
877
878
        if ( !c )
            continue;
        int p = 0;
Stephan Binner's avatar
Stephan Binner committed
879
        disstrU[p++] = c; //fontMap(c);
880
        bool lineDraw = isLineChar(c);
881
882
        bool doubleWidth = (newLine[x+1].character == 0);
        cr = newLine[x].rendition;
883
        _clipboard = newLine[x].backgroundColor;
884
        if (newLine[x].foregroundColor != cf) cf = newLine[x].foregroundColor;
885
        int lln = columnsToUpdate - x;
886
887
        for (len = 1; len < lln; len++)
        {
Robert Knight's avatar
   
Robert Knight committed
888
            const Character& ch = newLine[x+len];
889

Robert Knight's avatar
   
Robert Knight committed
890
891
892
893
            if (!ch.character)
                continue; // Skip trailing part of multi-col chars.

            if (  ch.foregroundColor != cf || 
894
                  ch.backgroundColor != _clipboard || 
Robert Knight's avatar
   
Robert Knight committed
895
896
897
898
                  ch.rendition != cr ||
                  !dirtyMask[x+len] || 
                  isLineChar(c) != lineDraw || 
                  (newLine[x+len+1].character == 0) != doubleWidth )
899
            break;
900

Stephan Binner's avatar
Stephan Binner committed
901
          disstrU[p++] = c; //fontMap(c);
902
        }
903
904

        QString unistr(disstrU, p);
905
906

        // for XIM on the spot input style
907
        _isIMEdit = _isIMSel = false;
908

909
        if ( _imStartLine == y ) 
Robert Knight's avatar
   
Robert Knight committed
910
        {
911
912
913
          if (  ( _imStart < _imEnd ) && 
                ( x >= _imStart-1 ) && 
                ( x + int( unistr.length() ) <= _imEnd ) 
Robert Knight's avatar
   
Robert Knight committed
914
             )
915
                _isIMEdit = true;
Robert Knight's avatar
   
Robert Knight committed
916

917
918
919
          if ( ( _imSelStart < _imSelEnd ) && 
               ( x >= _imStart-1 ) && 
               ( x + int( unistr.length() ) <= _imEnd ) 
Robert Knight's avatar
   
Robert Knight committed
920
             )
921
                _isIMSel = true;
Robert Knight's avatar
   
Robert Knight committed
922
	    }
923
        else if ( _imStartLine < y ) 
Robert Knight's avatar
   
Robert Knight committed
924
        {  // for word warp
925
926
          if ( _imStart < _imEnd )
            _isIMEdit = true;
927

928
929
          if (  _imSelStart < _imSelEnd )
            _isIMSel = true;
Robert Knight's avatar
   
Robert Knight committed
930
	    }
Stephan Kulow's avatar
Stephan Kulow committed
931

932
        bool save__fixedFont = _fixedFont;
933
        if (lineDraw)
934
           _fixedFont = false;
935
        if (doubleWidth)
936
           _fixedFont = false;
937

938
		updateLine = true;
939

940
		_fixedFont = save__fixedFont;
941
942
        x += len - 1;
      }
943
      
944
    }
945

946
	//both the top and bottom halves of double height _lines must always be redrawn
Robert Knight's avatar
   
Robert Knight committed
947
948
	//although both top and bottom halves contain the same characters, only 
    //the top one is actually 
949
	//drawn.
950
951
    if (_lineProperties.count() > y)
        updateLine |= (_lineProperties[y] & LINE_DOUBLEHEIGHT);
Robert Knight's avatar
   
Robert Knight committed
952

953
    // if the characters on the line are different in the old and the new _image
Robert Knight's avatar
   
Robert Knight committed
954
    // then this line must be repainted.    
955
956
    if (updateLine)
    {
957
        dirtyLineCount++;
Robert Knight's avatar
   
Robert Knight committed
958
959
960

        // add the area occupied by this line to the region which needs to be
        // repainted
961
962
963
964
        QRect dirtyRect = QRect( _bX+tLx , 
                                 _bY+tLy+_fontHeight*y , 
                                 _fontWidth * columnsToUpdate , 
                                 _fontHeight ); 	
965

966
        dirtyRegion |= dirtyRect;
967
    }
968

Waldo Bastian's avatar
Waldo Bastian committed
969
    dirtyMask--; // Set back
970

971
972
    // replace the line of characters in the old _image with the 
    // current line of the new _image 
973
    memcpy((void*)currentLine,(const void*)newLine,columnsToUpdate*sizeof(Character));
974
  }
975

976
  // free the image from the screen window
977
  delete[] newimg;
978

979
  // debugging - display a count of the number of lines that will need 
Robert Knight's avatar
   
Robert Knight committed
980
  // to be repainted
981
  //qDebug() << "dirty line count = " << dirtyLineCount;
982

983
984
985
  // if the new _image is smaller than the previous _image, then ensure that the area
  // outside the new _image is cleared 
  if ( linesToUpdate < _usedLines )
986
  {
987
988
989
990
    dirtyRegion |= QRect(   _bX+tLx , 
                            _bY+tLy+_fontHeight*linesToUpdate , 
                            _fontWidth * this->_columns , 
                            _fontHeight * (_usedLines-linesToUpdate) );
991
  }
992
  _usedLines = linesToUpdate;
993
  
994
  if ( columnsToUpdate < _usedColumns )
995
  {
996
997
998
999
    dirtyRegion |= QRect(   _bX+tLx+columnsToUpdate*_fontWidth , 
                            _bY+tLy , 
                            _fontWidth * (_usedColumns-columnsToUpdate) , 
                            _fontHeight * this->_lines );
1000
  }
1001
  _usedColumns = columnsToUpdate;
1002

1003
1004
  //qDebug() << "Expecting to update: " << dirtyRegion.boundingRect();

Robert Knight's avatar
   
Robert Knight committed
1005
  // update the parts of the display which have changed
1006
  update(dirtyRegion);
Stephan Kulow's avatar
Stephan Kulow committed
1007

1008
1009
  if ( _hasBlinker && !_blinkTimer->isActive()) _blinkTimer->start( BLINK_DELAY );