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
|
/* $OpenBSD: lib_getstr.c,v 1.3 1997/12/03 05:21:19 millert Exp $ */
/***************************************************************************
* COPYRIGHT NOTICE *
****************************************************************************
* ncurses is copyright (C) 1992-1995 *
* Zeyd M. Ben-Halim *
* zmbenhal@netcom.com *
* Eric S. Raymond *
* esr@snark.thyrsus.com *
* *
* Permission is hereby granted to reproduce and distribute ncurses *
* by any means and for any fee, whether alone or as part of a *
* larger distribution, in source or in binary form, PROVIDED *
* this notice is included with any such distribution, and is not *
* removed from any of its header files. Mention of ncurses in any *
* applications linked with it is highly appreciated. *
* *
* ncurses comes AS IS with no warranty, implied or expressed. *
* *
***************************************************************************/
/*
** lib_getstr.c
**
** The routine wgetstr().
**
*/
#include <curses.priv.h>
#include <term.h>
MODULE_ID("Id: lib_getstr.c,v 1.18 1997/09/20 15:02:34 juergen Exp $")
/*
* This wipes out the last character, no matter whether it was a tab, control
* or other character, and handles reverse wraparound.
*/
static char *WipeOut(WINDOW *win, int y, int x, char *first, char *last, bool echoed)
{
if (last > first) {
*--last = '\0';
if (echoed) {
int y1 = win->_cury;
int x1 = win->_curx;
wmove(win, y, x);
waddstr(win, first);
getyx(win, y, x);
while (win->_cury < y1
|| (win->_cury == y1 && win->_curx < x1))
waddch(win, ' ');
wmove(win, y, x);
}
}
return last;
}
int wgetnstr(WINDOW *win, char *str, int maxlen)
{
TTY buf;
bool oldnl, oldecho, oldraw, oldcbreak;
char erasec;
char killc;
char *oldstr;
int ch;
int y, x;
T((T_CALLED("wgetnstr(%p,%p, %d)"), win, str, maxlen));
if (!win)
returnCode(ERR);
_nc_get_curterm(&buf);
oldnl = SP->_nl;
oldecho = SP->_echo;
oldraw = SP->_raw;
oldcbreak = SP->_cbreak;
nl();
noecho();
noraw();
cbreak();
erasec = erasechar();
killc = killchar();
oldstr = str;
getyx(win, y, x);
if (is_wintouched(win) || (win->_flags & _HASMOVED))
wrefresh(win);
while ((ch = wgetch(win)) != ERR) {
/*
* Some terminals (the Wyse-50 is the most common) generate
* a \n from the down-arrow key. With this logic, it's the
* user's choice whether to set kcud=\n for wgetch();
* terminating *getstr() with \n should work either way.
*/
if (ch == '\n'
|| ch == '\r'
|| ch == KEY_DOWN
|| ch == KEY_ENTER) {
if (oldecho == TRUE
&& win->_cury == win->_maxy
&& win->_scroll)
wechochar(win, '\n');
break;
}
if (ch == erasec || ch == KEY_LEFT || ch == KEY_BACKSPACE) {
if (str > oldstr) {
str = WipeOut(win, y, x, oldstr, str, oldecho);
}
} else if (ch == killc) {
while (str > oldstr) {
str = WipeOut(win, y, x, oldstr, str, oldecho);
}
} else if (ch >= KEY_MIN
|| (maxlen >= 0 && str - oldstr >= maxlen)) {
beep();
} else {
*str++ = ch;
if (oldecho == TRUE) {
int oldy = win->_cury;
if (waddch(win, ch) == ERR) {
/*
* We can't really use the lower-right
* corner for input, since it'll mess
* up bookkeeping for erases.
*/
win->_flags &= ~_WRAPPED;
waddch(win, ' ');
str = WipeOut(win, y, x, oldstr, str, oldecho);
continue;
} else if (win->_flags & _WRAPPED) {
/*
* If the last waddch forced a wrap &
* scroll, adjust our reference point
* for erasures.
*/
if (win->_scroll
&& oldy == win->_maxy
&& win->_cury == win->_maxy) {
if (--y <= 0) {
y = 0;
}
}
win->_flags &= ~_WRAPPED;
}
wrefresh(win);
}
}
}
win->_curx = 0;
win->_flags &= ~_WRAPPED;
if (win->_cury < win->_maxy)
win->_cury++;
wrefresh(win);
/* Restore with a single I/O call, to fix minor asymmetry between
* raw/noraw, etc.
*/
SP->_nl = oldnl;
SP->_echo = oldecho;
SP->_raw = oldraw;
SP->_cbreak = oldcbreak;
_nc_set_curterm(&buf);
*str = '\0';
if (ch == ERR)
returnCode(ERR);
T(("wgetnstr returns %s", _nc_visbuf(oldstr)));
returnCode(OK);
}
|
