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
|
/* This work is copyrighted. See COPYRIGHT.OLD & COPYRIGHT.NEW for *
* details. If they are missing then this copy is in violation of *
* the copyright conditions. */
/*
** lib_addch.c
**
** The routine waddch().
**
*/
#include "curses.priv.h"
#include "unctrl.h"
static int
wladdch(WINDOW *win, chtype c, bool literal)
{
int x, y;
int newx;
chtype ch = c;
x = win->_curx;
y = win->_cury;
if (y > win->_maxy || x > win->_maxx || y < 0 || x < 0)
return(ERR);
/* ugly, but necessary --- and, bizarrely enough, even portable! */
if (literal)
goto noctrl;
switch (ch&A_CHARTEXT) {
case '\t':
for (newx = x + (8 - (x & 07)); x < newx; x++)
if (waddch(win, ' ') == ERR)
return(ERR);
return(OK);
case '\n':
wclrtoeol(win);
x = 0;
goto newline;
case '\r':
x = 0;
break;
case '\b':
if (--x < 0)
x = 0;
break;
default:
if (ch < ' ')
return(waddstr(win, unctrl(ch)));
/* FALL THROUGH */
noctrl:
T(("win attr = %x", win->_attrs));
ch |= win->_attrs;
if (win->_line[y][x]&A_CHARTEXT == ' ')
ch |= win->_bkgd;
else
ch |= (win->_bkgd&A_ATTRIBUTES);
T(("bkg = %x -> ch = %x", win->_bkgd, ch));
if (win->_line[y][x] != ch) {
if (win->_firstchar[y] == _NOCHANGE)
win->_firstchar[y] = win->_lastchar[y] = x;
else if (x < win->_firstchar[y])
win->_firstchar[y] = x;
else if (x > win->_lastchar[y])
win->_lastchar[y] = x;
}
T(("char %d of line %d is %x", x, y, ch));
win->_line[y][x++] = ch;
if (x > win->_maxx) {
x = 0;
newline:
y++;
if (y > win->_regbottom) {
y--;
if (win->_scroll)
scroll(win);
}
}
break;
}
win->_curx = x;
win->_cury = y;
return(OK);
}
int waddch(WINDOW *win, chtype ch)
{
TR(TRACE_CHARPUT, ("waddch(%x,%c (%x)) called", win, ch&A_CHARTEXT, ch));
return wladdch(win, ch, FALSE);
}
int wechochar(WINDOW *win, chtype ch)
{
T(("wechochar(%x,%c (%x)) called", win, ch&A_CHARTEXT, ch));
return wladdch(win, ch, TRUE);
}
|
