/
cursesapp.cpp
177 lines (149 loc) · 3.9 KB
/
cursesapp.cpp
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
/** @file cursesapp.cpp Application based on curses for input and output.
*
* @authors Copyright © 2013 Jaakko Keränen <jaakko.keranen@iki.fi>
*
* @par License
* GPL: http://www.gnu.org/licenses/gpl.html
*
* <small>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, see:
* http://www.gnu.org/licenses</small>
*/
#include <QTimer>
#include <QProcess>
#include <QTextStream>
#include <QDebug>
#include "cursesapp.h"
#include "cursestextcanvas.h"
#include <curses.h>
#include <stdio.h>
#include <de/Vector>
static void windowResized(int)
{
Q_ASSERT(qApp);
static_cast<CursesApp *>(qApp)->windowWasResized();
}
/**
* Determines the actual current size of the terminal.
*
* @return Terminal columns and rows.
*/
static de::Vector2i actualTerminalSize()
{
QByteArray result;
FILE *p = popen("stty size", "r");
forever
{
int c = fgetc(p);
if(c == EOF) break;
result.append(c);
}
pclose(p);
QTextStream is(result);
de::Vector2i size;
is >> size.y >> size.x;
return size;
}
struct CursesApp::Instance
{
CursesApp &self;
// Curses state:
WINDOW *rootWin;
de::Vector2i rootSize;
QTimer *inputPollTimer;
CursesTextCanvas *canvas;
Instance(CursesApp &a) : self(a), canvas(0)
{
initCurses();
}
~Instance()
{
delete inputPollTimer;
}
void initCurses()
{
// Initialize curses.
if(!(rootWin = initscr()))
{
qFatal("Failed initializing curses.");
return;
}
initCursesState();
// Listen for window resizing.
signal(SIGWINCH, windowResized);
inputPollTimer = new QTimer(&self);
QObject::connect(inputPollTimer, SIGNAL(timeout()), &self, SLOT(pollForInput()));
inputPollTimer->start(1000 / 20);
// Create the canvas.
canvas = new CursesTextCanvas(rootSize, rootWin);
canvas->show();
}
void initCursesState()
{
// The current size of the screen.
getmaxyx(stdscr, rootSize.y, rootSize.x);
scrollok(rootWin, FALSE);
wclear(rootWin);
// Initialize input.
cbreak();
noecho();
nonl();
nodelay(rootWin, TRUE);
keypad(rootWin, TRUE);
}
void shutdownCurses()
{
delete canvas;
canvas = 0;
delete inputPollTimer;
inputPollTimer = 0;
delwin(rootWin);
rootWin = 0;
endwin();
refresh();
}
void pollForInput()
{
if(!rootWin) return;
int key;
while((key = wgetch(rootWin)) != ERR)
{
if(key == KEY_RESIZE)
{
de::Vector2i size = actualTerminalSize();
resize_term(size.y, size.x);
emit self.viewResized(size.x, size.y);
}
else
{
qDebug() << "Got key" << QString("%1").arg(key, 0, 16);
}
}
}
void windowWasResized() // called from signal handler
{
ungetch(KEY_RESIZE);
}
};
CursesApp::CursesApp(int &argc, char **argv)
: QApplication(argc, argv, QApplication::Tty), d(new Instance(*this))
{
}
CursesApp::~CursesApp()
{
delete d;
}
void CursesApp::windowWasResized() // called from signal handler
{
d->windowWasResized();
}
void CursesApp::pollForInput()
{
d->pollForInput();
}