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
|
/*
* edline.c:
* Text input on a line of the screen.
*
*/
static const char rcsid[] = "$Id: edline.c,v 1.2 2002/11/04 12:27:35 chris Exp $";
#include <ctype.h>
#include <curses.h>
#include <string.h>
#include "iftop.h"
static int min(const int a, const int b) {
return a < b ? a : b;
}
/* edline:
* Display on line linenum of the screen the prompt and allow the user to input
* a line of text, whose initial value is as supplied. */
char *edline(int linenum, const char *prompt, const char *initial) {
int xstart, slen, off = 0, pos, i, c;
char *str;
xstart = strlen(prompt) + 2;
if (initial) {
str = xmalloc(slen = strlen(initial) * 2 + 1);
strcpy(str, initial);
} else {
str = xmalloc(slen = 256);
*str = 0;
}
pos = strlen(str);
do {
c = getch();
switch (c) {
case KEY_DL:
case 21: /* ^U */
*str = 0;
pos = 0;
break;
case KEY_LEFT:
--pos;
if (pos < 0) {
beep();
pos = 0;
}
break;
case KEY_RIGHT:
++pos;
if (pos > strlen(str)) {
beep();
pos = strlen(str);
}
break;
case KEY_HOME:
case 1: /* ^A */
pos = 0;
break;
case KEY_END:
case 5: /* ^E */
pos = strlen(str);
break;
case KEY_DC:
if (pos == strlen(str))
beep();
else
memmove(str + pos, str + pos + 1, strlen(str + pos + 1) + 1);
break;
case KEY_BACKSPACE:
if (pos == 0)
beep();
else {
memmove(str + pos - 1, str + pos, strlen(str + pos) + 1);
--pos;
}
break;
case 23: /* ^W */
for (i = pos; i > 0; --i)
if (!isspace((int)str[i])) break;
for (; i > 0; --i)
if (isspace((int)str[i])) break;
if (i != pos) {
memmove(str + i, str + pos, strlen(str + pos) + 1);
pos = i;
}
break;
case ERR:
break;
default:
if (isprint(c) && c != '\t') {
if (strlen(str) == slen - 1)
str = xrealloc(str, slen *= 2);
memmove(str + pos + 1, str + pos, strlen(str + pos) + 1);
str[pos++] = (char)c;
} else
beep();
break;
}
/* figure out the offset to use for the string */
off = 0;
if (pos > COLS - xstart - 1)
off = pos - (COLS - xstart - 1);
/* display the string */
mvaddstr(linenum, 0, prompt);
addstr("> ");
addnstr(str + off, min(strlen(str + off), COLS - xstart - 1));
clrtoeol();
move(linenum, xstart + pos - off);
refresh();
} while (c != KEY_ENTER && c != '\r' && c != '\x1b' && c != 7 /* ^G */);
if (c == KEY_ENTER || c == '\r')
/* Success */
return str;
else {
xfree(str);
return NULL;
}
}
|
