1 /* Just a simple example program that creates a terminal in a frame
2 * and lets the user interact with it.
3 *
4 * To compile:
5 * gcc -o boxshell boxshell.c $(rote-config --cflags --libs)
6 */
7
8 #include <ncurses.h>
9 #include <stdio.h>
10 #include <rote/rote.h>
11 #include <signal.h>
12
13 static unsigned char getout = 0;
sigchld(int signo)14 void sigchld(int signo) { getout = 1; }
15 int my_custom_handler(RoteTerm *rt, const char *es);
16
17 int screen_w, screen_h;
18 WINDOW *term_win;
19
main()20 int main() {
21 RoteTerm *rt;
22 int i, j, ch;
23
24 signal(SIGCHLD, sigchld);
25
26 initscr();
27 noecho();
28 start_color();
29 raw();
30 nodelay(stdscr, TRUE); /* prevents getch() from blocking; rather
31 * it will return ERR when there is no
32 * keypress available */
33
34 keypad(stdscr, TRUE); /* necessary to use rote_vt_keypress */
35 getmaxyx(stdscr, screen_h, screen_w);
36
37 /* initialize the color pairs the way rote_vt_draw expects it. You might
38 * initialize them differently, but in that case you would need
39 * to supply a custom conversion function for rote_vt_draw to
40 * call when setting attributes. The idea of this "default" mapping
41 * is to map (fg,bg) to the color pair bg * 8 + 7 - fg. This way,
42 * the pair (white,black) ends up mapped to 0, which means that
43 * it does not need a color pair (since it is the default). Since
44 * there are only 63 available color pairs (and 64 possible fg/bg
45 * combinations), we really have to save 1 pair by assigning no pair
46 * to the combination white/black. */
47 for (i = 0; i < 8; i++) for (j = 0; j < 8; j++)
48 if (i != 7 || j != 0)
49 init_pair(j*8+7-i, i, j);
50
51 /* paint the screen blue */
52 attrset(COLOR_PAIR(32));
53 for (i = 0; i < screen_h; i++) for (j = 0; j < screen_w; j++) addch(' ');
54 refresh();
55
56 /* create a window with a frame */
57 term_win = newwin(22,72,1,4);
58 wattrset(term_win, COLOR_PAIR(7*8+7-0)); /* black over white */
59 wborder(term_win, 0, 0, 0, 0, 0, 0, 0, 0);
60 mvwprintw(term_win, 0, 27, " Term In a Box ");
61 wrefresh(term_win);
62
63 /* create the terminal and have it run bash */
64 rt = rote_vt_create(20, 70);
65 rote_vt_forkpty(rt, "/bin/bash --login");
66
67 /* add a sample custom escape sequence handler... say we want to handle
68 * the sequence, say, \e{N}, which will change the application's background
69 * color to N (where N is a number between 0 and 7). */
70 rote_vt_install_handler(rt, my_custom_handler);
71
72 /* keep reading keypresses from the user and passing them to the terminal;
73 * also, redraw the terminal to the window at each iteration */
74 ch = '\0';
75 while (!getout) {
76 rote_vt_draw(rt, term_win, 1, 1, NULL);
77 wrefresh(term_win);
78
79 ch = getch();
80 if (ch != ERR)
81 rote_vt_keypress(rt, ch); /* pass the keypress for handling */
82 }
83
84 endwin();
85 return 0;
86 }
87
88
my_custom_handler(RoteTerm * rt,const char * es)89 int my_custom_handler(RoteTerm *rt, const char *es) {
90 int color;
91 int i, j;
92
93 /* if the escape sequence does not begin with '{', we give up */
94 if (*es != '{') return ROTE_HANDLERESULT_NOWAY;
95
96 /* ok, now we know it begins with '{'. Now, if it does not end with '}',
97 * it is not yet complete */
98 if (es[strlen(es)-1] != '}') return ROTE_HANDLERESULT_NOTYET;
99
100 /* ok, the sequence is complete */
101 color = atoi(es + 1);
102 if (color < 0 || color > 7) return false; /* don't recognize it */
103
104 /* paint the background with that color */
105 attrset(COLOR_PAIR(color * 8));
106 move(0, 0);
107 for (i = 0; i < screen_h; i++) for (j = 0; j < screen_w; j++) addch(' ');
108 touchwin(stdscr);
109 refresh();
110
111 /* touch term_win to force it to do a full redraw next time */
112 touchwin(term_win);
113
114 /* and redraw the terminal window */
115 wrefresh(term_win);
116
117 /* escape sequence was handled ok */
118 return ROTE_HANDLERESULT_OK;
119 }
120
121