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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
|
/* Public Domain Curses */
#include <curspriv.h>
RCSID("$Id: pad.c,v 1.50 2008/07/14 12:22:13 wmcbrine Exp $")
/*man-start**************************************************************
Name: pad
Synopsis:
WINDOW *newpad(int nlines, int ncols);
WINDOW *subpad(WINDOW *orig, int nlines, int ncols,
int begy, int begx);
int prefresh(WINDOW *win, int py, int px, int sy1, int sx1,
int sy2, int sx2);
int pnoutrefresh(WINDOW *w, int py, int px, int sy1, int sx1,
int sy2, int sx2);
int pechochar(WINDOW *pad, chtype ch);
int pecho_wchar(WINDOW *pad, const cchar_t *wch);
Description:
A pad is a special kind of window, which is not restricted by
the screen size, and is not necessarily associated with a
particular part of the screen. You can use a pad when you need
a large window, and only a part of the window will be on the
screen at one time. Pads are not refreshed automatically (e.g.,
from scrolling or echoing of input). You can't call wrefresh()
with a pad as an argument; use prefresh() or pnoutrefresh()
instead. Note that these routines require additional parameters
to specify the part of the pad to be displayed, and the location
to use on the screen.
newpad() creates a new pad data structure.
subpad() creates a new sub-pad within a pad, at position (begy,
begx), with dimensions of nlines lines and ncols columns. This
position is relative to the pad, and not to the screen as with
subwin. Changes to either the parent pad or sub-pad will affect
both. When using sub-pads, you may need to call touchwin()
before calling prefresh().
pnoutrefresh() copies the specified pad to the virtual screen.
prefresh() calls pnoutrefresh(), followed by doupdate().
These routines are analogous to wnoutrefresh() and wrefresh().
(py, px) specifies the upper left corner of the part of the pad
to be displayed; (sy1, sx1) and (sy2, sx2) describe the screen
rectangle that will contain the selected part of the pad.
pechochar() is functionally equivalent to addch() followed by
a call to prefresh(), with the last-used coordinates and
dimensions. pecho_wchar() is the wide-character version.
Return Value:
All functions return OK on success and ERR on error.
Portability X/Open BSD SYS V
newpad Y - Y
subpad Y - Y
prefresh Y - Y
pnoutrefresh Y - Y
pechochar Y - 3.0
pecho_wchar Y
**man-end****************************************************************/
#include <string.h>
/* save values for pechochar() */
static int save_pminrow, save_pmincol;
static int save_sminrow, save_smincol, save_smaxrow, save_smaxcol;
WINDOW *newpad(int nlines, int ncols)
{
WINDOW *win;
PDC_LOG(("newpad() - called: lines=%d cols=%d\n", nlines, ncols));
if ( !(win = PDC_makenew(nlines, ncols, -1, -1))
|| !(win = PDC_makelines(win)) )
return (WINDOW *)NULL;
werase(win);
win->_flags = _PAD;
/* save default values in case pechochar() is the first call to
prefresh(). */
save_pminrow = 0;
save_pmincol = 0;
save_sminrow = 0;
save_smincol = 0;
save_smaxrow = min(LINES, nlines) - 1;
save_smaxcol = min(COLS, ncols) - 1;
return win;
}
WINDOW *subpad(WINDOW *orig, int nlines, int ncols, int begy, int begx)
{
WINDOW *win;
int i;
int j = begy;
int k = begx;
PDC_LOG(("subpad() - called: lines=%d cols=%d begy=%d begx=%d\n",
nlines, ncols, begy, begx));
if (!orig || !(orig->_flags & _PAD))
return (WINDOW *)NULL;
/* make sure window fits inside the original one */
if ((begy < orig->_begy) || (begx < orig->_begx) ||
(begy + nlines) > (orig->_begy + orig->_maxy) ||
(begx + ncols) > (orig->_begx + orig->_maxx))
return (WINDOW *)NULL;
if (!nlines)
nlines = orig->_maxy - 1 - j;
if (!ncols)
ncols = orig->_maxx - 1 - k;
if ( !(win = PDC_makenew(nlines, ncols, begy, begx)) )
return (WINDOW *)NULL;
/* initialize window variables */
win->_attrs = orig->_attrs;
win->_leaveit = orig->_leaveit;
win->_scroll = orig->_scroll;
win->_nodelay = orig->_nodelay;
win->_use_keypad = orig->_use_keypad;
win->_parent = orig;
for (i = 0; i < nlines; i++)
win->_y[i] = (orig->_y[j++]) + k;
win->_flags = _SUBPAD;
/* save default values in case pechochar() is the first call
to prefresh(). */
save_pminrow = 0;
save_pmincol = 0;
save_sminrow = 0;
save_smincol = 0;
save_smaxrow = min(LINES, nlines) - 1;
save_smaxcol = min(COLS, ncols) - 1;
return win;
}
int prefresh(WINDOW *win, int py, int px, int sy1, int sx1, int sy2, int sx2)
{
PDC_LOG(("prefresh() - called\n"));
if (pnoutrefresh(win, py, px, sy1, sx1, sy2, sx2) == ERR)
return ERR;
doupdate();
return OK;
}
int pnoutrefresh(WINDOW *w, int py, int px, int sy1, int sx1, int sy2, int sx2)
{
int num_cols;
int sline = sy1;
int pline = py;
PDC_LOG(("pnoutrefresh() - called\n"));
if (!w || !(w->_flags & (_PAD|_SUBPAD)) || (sy2 >= LINES) || (sy2 >= COLS))
return ERR;
if (py < 0)
py = 0;
if (px < 0)
px = 0;
if (sy1 < 0)
sy1 = 0;
if (sx1 < 0)
sx1 = 0;
if (sy2 < sy1 || sx2 < sx1)
return ERR;
num_cols = min((sx2 - sx1 + 1), (w->_maxx - px));
while (sline <= sy2)
{
if (pline < w->_maxy)
{
memcpy(curscr->_y[sline] + sx1, w->_y[pline] + px,
num_cols * sizeof(chtype));
if ((curscr->_firstch[sline] == _NO_CHANGE)
|| (curscr->_firstch[sline] > sx1))
curscr->_firstch[sline] = sx1;
if (sx2 > curscr->_lastch[sline])
curscr->_lastch[sline] = sx2;
w->_firstch[pline] = _NO_CHANGE; /* updated now */
w->_lastch[pline] = _NO_CHANGE; /* updated now */
}
sline++;
pline++;
}
if (w->_clear)
{
w->_clear = FALSE;
curscr->_clear = TRUE;
}
/* position the cursor to the pad's current position if possible --
is the pad current position going to end up displayed? if not,
then don't move the cursor; if so, move it to the correct place */
if (!w->_leaveit && w->_cury >= py && w->_curx >= px &&
w->_cury <= py + (sy2 - sy1) && w->_curx <= px + (sx2 - sx1))
{
curscr->_cury = (w->_cury - py) + sy1;
curscr->_curx = (w->_curx - px) + sx1;
}
return OK;
}
int pechochar(WINDOW *pad, chtype ch)
{
PDC_LOG(("pechochar() - called\n"));
if (waddch(pad, ch) == ERR)
return ERR;
return prefresh(pad, save_pminrow, save_pmincol, save_sminrow,
save_smincol, save_smaxrow, save_smaxcol);
}
#ifdef PDC_WIDE
int pecho_wchar(WINDOW *pad, const cchar_t *wch)
{
PDC_LOG(("pecho_wchar() - called\n"));
if (!wch || (waddch(pad, *wch) == ERR))
return ERR;
return prefresh(pad, save_pminrow, save_pmincol, save_sminrow,
save_smincol, save_smaxrow, save_smaxcol);
}
#endif
|
