summaryrefslogtreecommitdiff
path: root/tools/qvfb/qvfbx11view.cpp
blob: 645f5185c54807c2ee674a333223353389b52a4c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
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
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the tools module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qvfbx11view.h"
#include "x11keyfaker.h"
#include <qevent.h>
#include <QX11Info>
#include <QTimer>
#include <QProcess>
#include <QDebug>
#include <QUuid>
#include <QDataStream>
#include <QTemporaryFile>
#include <X11/Xlib.h>

QT_BEGIN_NAMESPACE

QVFbX11View::QVFbX11View
	(int id, int w, int h, int d, Rotation r, QWidget *parent)
    : QVFbAbstractView(parent)
{
    this->id = id;
    this->w = w;
    this->h = h;
    this->d = d;
    this->rotation = r;
    this->gr = 1.0;
    this->gg = 1.0;
    this->gb = 1.0;
    this->touchscreen = false;
    this->lcd = false;
    this->keyFaker = 0;
    this->xnest = 0;
    this->serverAuthFile = 0;
    this->shutdown = false;

    // Try to find Xephyr, as it is better than Xnest in many ways.
    if (QFile::exists("/usr/bin/Xephyr"))
        xserver = "/usr/bin/Xephyr";
    else if (QFile::exists("/usr/local/bin/Xephyr"))
        xserver = "/usr/local/bin/Xephyr";
    else if (QFile::exists("/usr/X11R6/bin/Xephyr"))
        xserver = "/usr/X11R6/bin/Xephyr";
    else
        xserver = "Xnest";
}

QVFbX11View::~QVFbX11View()
{
    shutdown = true;
    if (xnest) {
	xnest->terminate();
	xnestStopped();
    }
}

int QVFbX11View::displayId() const
{
    return id;
}

int QVFbX11View::displayWidth() const
{
    return ( (int)rotation & 0x01 ) ? h : w;
}

int QVFbX11View::displayHeight() const
{
    return ( (int)rotation & 0x01 ) ? w : h;
}

int QVFbX11View::displayDepth() const
{
    return d;
}

QVFbX11View::Rotation QVFbX11View::displayRotation() const
{
    return rotation;
}

void QVFbX11View::skinKeyPressEvent(int code, const QString&, bool)
{
    if (keyFaker)
	keyFaker->sendKeyEvent(code, true);
}

void QVFbX11View::skinKeyReleaseEvent(int code, const QString&, bool)
{
    if (keyFaker)
	keyFaker->sendKeyEvent(code, false);
}

void QVFbX11View::setGamma(double gr, double gg, double gb)
{
    // We remember the values, but don't do anything with them.
    this->gr = gr;
    this->gg = gg;
    this->gb = gb;
}

double QVFbX11View::gammaRed() const
{
    return gr;
}

double QVFbX11View::gammaGreen() const
{
    return gg;
}

double QVFbX11View::gammaBlue() const
{
    return gb;
}

void QVFbX11View::getGamma(int, QRgb& rgb)
{
    rgb = qRgb(255, 255, 255);
}

bool QVFbX11View::touchScreenEmulation() const
{
    return touchscreen;
}

bool QVFbX11View::lcdScreenEmulation() const
{
    return lcd;
}

int QVFbX11View::rate()
{
    // We don't support refresh rates, so return a default value.
    return 30;
}

bool QVFbX11View::animating() const
{
    // We don't support animation.
    return false;
}

QImage QVFbX11View::image() const
{
    // We don't support image capture.
    return QImage();
}

void QVFbX11View::setRate(int)
{
    // We don't support rate adjustments.
}


double QVFbX11View::zoomH() const
{
    // Zoom is not possible with Xnest.
    return 1.0;
}

double QVFbX11View::zoomV() const
{
    // Zoom is not possible with Xnest.
    return 1.0;
}

QSize QVFbX11View::sizeHint() const
{
    return QSize(w, h);
}

void QVFbX11View::setTouchscreenEmulation( bool flag )
{
    touchscreen = flag;
}

void QVFbX11View::setLcdScreenEmulation( bool flag )
{
    lcd = flag;
}

void QVFbX11View::setZoom( double, double )
{
    // Zoom is not possible with Xnest.
}

void QVFbX11View::setRotation( Rotation )
{
    // Rotation is not possible with Xnest.
}

void QVFbX11View::startAnimation( const QString& )
{
    // Animation is not supported.
}

void QVFbX11View::stopAnimation()
{
    // Animation is not supported.
}

// Generate a 16-byte magic cookie string.
static QString generateMagicCookie()
{
    static const char hexchars[] = "0123456789abcdef";
    QUuid uuid = QUuid::createUuid();
    QByteArray ba;
    QDataStream stream(&ba, QIODevice::WriteOnly);
    stream << uuid;
    QString value;
    foreach ( char ch, ba ) {
	value += QChar( hexchars[(ch >> 4) & 0x0F] );
	value += QChar( hexchars[ch & 0x0F] );
    }
    return value;
}

void QVFbX11View::showEvent(QShowEvent *e)
{
    if (!xnest)
	startXnest();
    QWidget::showEvent(e);
}

void QVFbX11View::keyPressEvent(QKeyEvent *e)
{
    if (keyFaker)
	keyFaker->sendKeyEvent(e->key(), true);
    QWidget::keyPressEvent(e);
}

void QVFbX11View::keyReleaseEvent(QKeyEvent *e)
{
    if (keyFaker)
	keyFaker->sendKeyEvent(e->key(), false);
    QWidget::keyReleaseEvent(e);
}

void QVFbX11View::startXnest()
{
    // Add authentication credentials to the XAUTHORITY file.
    QString cookie = generateMagicCookie();
    QStringList xauthargs;
    xauthargs += "add";
    xauthargs += ":" + QString::number(displayId());
    xauthargs += "MIT-MAGIC-COOKIE-1";
    xauthargs += cookie;
    if (QProcess::execute("xauth", xauthargs) != 0)
	qWarning() << "xauth: failed to add Xnest client authentication credentials";

    // Write the credentials to another authentication file for the server.
    serverAuthFile = new QTemporaryFile(this);
    QString authFilename;
    if (serverAuthFile->open()) {
	authFilename = serverAuthFile->fileName();
	serverAuthFile->close();
	xauthargs.clear();
	xauthargs += "-f";
	xauthargs += authFilename;
	xauthargs += "add";
	xauthargs += ":" + QString::number(displayId());
	xauthargs += "MIT-MAGIC-COOKIE-1";
	xauthargs += cookie;
	if (QProcess::execute("xauth", xauthargs) != 0)
	    qWarning() << "xauth: failed to add Xnest server authentication credentials";
    }

    // Create a raw X11 window to act as the Xnest's root window.
    // We cannot use winId() directly because qvfb is already
    // selecting for events that Xnest wants to select for.
    WId root = XCreateSimpleWindow
	(QX11Info::display(), winId(), 0, 0, w, h, 0,
	 BlackPixel(QX11Info::display(), QX11Info::appScreen()),
	 BlackPixel(QX11Info::display(), QX11Info::appScreen()));
    XMapWindow(QX11Info::display(), root);

    // Warn the user if the visual number looks wrong.  Xnest expects
    // its root window to be on the default visual.
    if (QX11Info::appVisual() != DefaultVisual(QX11Info::display(), QX11Info::appScreen())) {
	qWarning() << "*** Qt is not using the default visual.  Xnest may fail "
		      "with a BadMatch error.";
	qWarning() << "*** If it fails, then restart qvfb with \" -visual"
		   << DefaultVisual(QX11Info::display(), QX11Info::appScreen())
			    ->visualid << "\"";
    }

    // Make sure the root window is in the X server before Xnest starts.
    XSync(QX11Info::display(), False);

    // Start the Xnest process.
    xnest = new QProcess(this);
    connect(xnest, SIGNAL(error(QProcess::ProcessError)),
	    this, SLOT(xnestStopped()));
    connect(xnest, SIGNAL(finished(int,QProcess::ExitStatus)),
	    this, SLOT(xnestStopped()));
    QStringList args;
    args += "-auth";
    args += authFilename;
    if (!xserver.contains("Xephyr")) {
        args += "-geometry";
        args += QString::number(w) + "x" + QString::number(h) + "+0+0";
        args += "-depth";
        args += QString::number(d);
    }
    args += "-br";	    // Start Xnest with a black background.
    args += "-parent";
    args += "0x" + QString::number(root, 16);
    args += ":" + QString::number(displayId());
    xnest->setProcessChannelMode(QProcess::ForwardedChannels);
    xnest->start(xserver, args);
    //qDebug() << args;

    QTimer::singleShot(200, this, SLOT(startKeyFaker()));
}

void QVFbX11View::xnestStopped()
{
    if (!shutdown) {
	if (xnest && xnest->error() == QProcess::FailedToStart)
	    qWarning() << xserver << "could not be started";
	else
	    qWarning() << xserver << "stopped unexpectedly";
    }
    if (keyFaker) {
	delete keyFaker;
	keyFaker = 0;
    }
    if (xnest) {
	xnest->deleteLater();
	xnest = 0;

	QStringList xauthargs;
	xauthargs += "remove";
	xauthargs += ":" + QString::number(displayId());
	if (QProcess::execute("xauth", xauthargs) != 0)
	    qWarning() << "xauth: failed to remove Xnest authentication credentials";
    }
    if (serverAuthFile) {
	delete serverAuthFile;
	serverAuthFile = 0;
    }
}

void QVFbX11View::startKeyFaker()
{
    if (!keyFaker && xnest)
	keyFaker = new X11KeyFaker(":" + QString::number(displayId()), this);
}

QT_END_NAMESPACE