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
|
/***************************************************************************
* 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. *
* *
***************************************************************************/
/*
* Note: This code is not part of the SVr4/XSI Curses API!
*/
#include "curses.priv.h"
#include <stdlib.h>
int wresize(WINDOW *win, int new_lines, int new_cols)
{
chtype blank = _nc_render(win, ' ', BLANK);
register int i, j;
T(("wresize(win=%p, lines=%d, cols=%d) called", win, new_lines, new_cols));
if (new_lines <= 0 || new_cols <= 0)
return ERR;
/* window height is different, must mess with the line vector */
if (new_lines != win->_maxy+1)
{
struct ldat *tp;
/* free old lines no longer used */
if (!(win->_flags & _SUBWIN))
for (i = new_lines + 1; i <= win->_maxy; i++)
free((char *)(win->_line[i].text));
/* resize the window line vector */
if (!(win->_line = realloc(win->_line, sizeof(struct ldat) * new_lines)))
return(ERR);
/* grab new lines for the window if needed */
for (tp=&win->_line[i=win->_maxy+1]; tp<&win->_line[new_lines]; i++,tp++)
{
if (win->_flags & _SUBWIN) /* set up alias pointers */
tp->text = &(win->_parent->_line[win->_pary+i].text[win->_parx]);
else /* allocate new lines if needed */
{
if (!(tp->text = (chtype *)malloc(sizeof(chtype) * new_cols)))
return(ERR);
for (j = 0; j < new_cols; j++)
tp->text[j] = blank;
}
tp->firstchar = 0;
tp->lastchar = new_cols;
tp->oldindex = i;
}
/*
* This is kind of nasty. We have to clip the scrolling region to
* within the new window size. We also have to assume that if the
* bottom of the scrolling region is the last line, the user wants
* that bottom to stick to the bottom of the resized window. The
* real problem here is that the API doesn't distinguish between
* resetting the scroll region to the entire window and setting it
* to an explicit scroll region that happens to include the whole
* window.
*/
if (win->_regtop > new_lines - 1 || win->_regtop == win->_maxy)
win->_regtop = new_lines - 1;
if (win->_regbottom > new_lines - 1 || win->_regbottom == win->_maxy)
win->_regbottom = new_lines - 1;
}
/* window width is different, resize all old lines */
if (new_cols != win->_maxx+1)
for (i = 0; i < min(new_lines, win->_maxy+1); i++)
{
/* if not a subwindow, we have our own storage; resize each line */
if (!(win->_flags & _SUBWIN))
{
win->_line[i].text=realloc(win->_line[i].text,sizeof(chtype)*new_cols);
if (win->_line[i].text == (chtype *)NULL)
return(ERR);
}
if (new_cols > win->_maxx+1) /* window is growing horizontally */
{
if (win->_line[i].firstchar == _NOCHANGE)
win->_line[i].firstchar = win->_maxx+1;
win->_line[i].lastchar = new_cols;
for (j = win->_maxx+1; j < new_cols; j++) /* blank-fill ends */
win->_line[i].text[j] = blank;
}
else /* window is shrinking horizontally */
{
if (win->_line[i].firstchar > win->_maxx+1)
win->_line[i].firstchar = _NOCHANGE;
else if (win->_line[i].lastchar > new_cols)
win->_line[i].lastchar = new_cols;
}
}
/* clip the cursor position to within the new size */
if (win->_curx > new_cols - 1)
win->_curx = new_cols - 1;
if (win->_cury > new_lines - 1)
win->_cury = new_lines - 1;
/* whether this is a full-width or full-depth window may have changed */
win->_flags &=~ (_ENDLINE|_FULLWIN|_SCROLLWIN);
if (win->_begx + new_cols == screen_columns)
{
win->_flags |= _ENDLINE;
if (win->_begx == 0 && new_lines == screen_lines && win->_begy == 0)
win->_flags |= _FULLWIN;
if (win->_begy + new_lines == screen_lines)
win->_flags |= _SCROLLWIN;
}
/* right margin may have moved, set _NEED_WRAP properly */
if ((win->_flags & _NEED_WRAP) && win->_curx != new_cols - 1)
{
win->_curx++;
win->_flags &=~ _NEED_WRAP;
}
if (!(win->_flags & _NEED_WRAP) && win->_curx == new_cols)
{
win->_curx--;
win->_flags |= _NEED_WRAP;
}
/* finally, update size members */
win->_maxy = new_lines - 1;
win->_maxx = new_cols - 1;
return OK;
}
|
