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
|
/*
* Copyright (c) 2012-2015 Christian Surlykke, Petr Vanek
*
* This file is part of qt-lightdm-greeter
* It is distributed under the LGPL 2.1 or later license.
* Please refer to the LICENSE file for a copy of the license.
*/
#include <QtWidgets/QApplication>
#include <QDesktopWidget>
#include <QtGlobal>
#include <QtDebug>
#include <QSettings>
#include <QIcon>
#include <QPainter>
#include <QMap>
#include <fcntl.h> /* Obtain O_* constant definitions */
#include <unistd.h>
#include <iostream>
#include "settings.h"
#include "mainwindow.h"
#include "x11util.h"
#include "global.h"
static void messageHandler(QtMsgType type, const QMessageLogContext&, const QString& msg)
{
std::cerr << type << ": " << msg.toUtf8().constData() << '\n';
}
static inline int size(const QRect& r)
{
return r.width() * r.height();
}
int main(int argc, char *argv[])
{
if (argc > 1 && QString(argv[1]) == QString("--test")) {
Global::enableTestMode();
}
QApplication a(argc, argv);
// I have no idea why, but Qt's stock qWarning() output never makes it
// to /var/log/lightdm/x-0-greeter.log, so we use std::cerr instead..
qInstallMessageHandler(messageHandler);
if (! Settings().iconThemeName().isEmpty()) {
QIcon::setThemeName(Settings().iconThemeName());
}
if (!Global::testMode() && !Settings().autoLoginCheckCmd().isEmpty()) {
QProcess p;
int ret = QProcess::execute(Settings().autoLoginCheckCmd());
if (ret == 0) {
if (Global::autoLoginGuest()) {
qWarning() << "Guest login ok";
return a.exec();
// TODO: Background?
} else {
qWarning() << "Guest login failed";
// TODO: Set error message, display somewhere
}
}
}
// Build background for X server, in case we start a session that
// doesn't set one on its own this will make sure it's not simply
// black
QImage entire;
// Get a list of non-overlapping screens, as this might lead to a broken
// greeter with main windows covering other login forms
QMap<int, QRect> screens;
if (Global::testMode()) {
screens.insert(0, QRect(0, 0, 1024, 768));
} else {
QSize desktopSize = QApplication::desktop()->size();
qWarning() << "Desktop full size is " << desktopSize;
entire = QImage(desktopSize, QImage::Format_RGB32);
for (int i = 0; i < QApplication::desktop()->screenCount(); ++i) {
QRect r = QApplication::desktop()->screenGeometry(i);
QMutableMapIterator<int, QRect>it(screens);
while (it.hasNext()) {
it.next();
if (!it.value().intersects(r))
continue;
// Overlap, bigger wins
if (size(it.value()) >= size(r)) {
// Existing is bigger
goto skip_rect;
}
// New is bigger, remove existing and keep going
it.remove();
}
// We reached here, so add new window
screens.insert(i, r);
skip_rect: ; // Do nothing
}
}
// Determine primary screen
int primary;
if (screens.contains(QApplication::desktop()->primaryScreen())) {
// Primary screen still in selection
primary = QApplication::desktop()->primaryScreen();
} else {
// Fallback to first one
primary = screens.begin().key();
}
// Now set up all the screens
QPainter painter(&entire);
MainWindow *focusWindow = 0;
QMapIterator<int, QRect> it(screens);
while (it.hasNext()) {
it.next();
MainWindow *w = new MainWindow(primary == it.key(), it.key(), it.value());
w->show();
if (w->showLoginForm()) {
focusWindow = w;
}
if (!entire.isNull()) {
QPoint p = it.value().topLeft();
painter.drawImage(p, w->getBackground());
}
}
if (!entire.isNull()) {
qWarning() << "Setting x background";
AddPixmapToBackground(entire.constBits(), entire.width(), entire.height(), 24, entire.bytesPerLine(), entire.byteCount());
}
// Ensure we set the primary screen's widget as active when there
// are more screens
if (focusWindow) {
focusWindow->setFocus(Qt::OtherFocusReason);
focusWindow->activateWindow();
}
return a.exec();
}
|
