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/* $OpenBSD: wresize.c,v 1.1 1999/01/18 19:10:08 millert Exp $ */
/****************************************************************************
* Copyright (c) 1998 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Thomas E. Dickey <dickey@clark.net> 1996,1997 *
****************************************************************************/
#include <curses.priv.h>
MODULE_ID("$From: wresize.c,v 1.11 1998/10/12 12:24:40 Alexander.V.Lukyanov Exp $")
/*
* Reallocate a curses WINDOW struct to either shrink or grow to the specified
* new lines/columns. If it grows, the new character cells are filled with
* blanks. The application is responsible for repainting the blank area.
*/
#define DOALLOC(p,t,n) (t *)_nc_doalloc(p, sizeof(t)*(n))
#define ld_ALLOC(p,n) DOALLOC(p,struct ldat,n)
#define c_ALLOC(p,n) DOALLOC(p,chtype,n)
int
wresize(WINDOW *win, int ToLines, int ToCols)
{
register int row;
int size_x, size_y;
struct ldat *pline;
chtype blank;
#ifdef TRACE
T((T_CALLED("wresize(%p,%d,%d)"), win, ToLines, ToCols));
if (win) {
TR(TRACE_UPDATE, ("...beg (%d, %d), max(%d,%d), reg(%d,%d)",
win->_begy, win->_begx,
win->_maxy, win->_maxx,
win->_regtop, win->_regbottom));
if (_nc_tracing & TRACE_UPDATE)
_tracedump("...before", win);
}
#endif
if (!win || --ToLines < 0 || --ToCols < 0)
returnCode(ERR);
size_x = win->_maxx;
size_y = win->_maxy;
if (ToLines == size_y
&& ToCols == size_x)
returnCode(OK);
pline = (win->_flags & _SUBWIN) ? win->_parent->_line : 0;
/*
* If the number of lines has changed, adjust the size of the overall
* vector:
*/
if (ToLines != size_y) {
if (! (win->_flags & _SUBWIN)) {
for (row = ToLines+1; row <= size_y; row++)
free((char *)(win->_line[row].text));
}
win->_line = ld_ALLOC(win->_line, ToLines+1);
if (win->_line == 0)
returnCode(ERR);
for (row = size_y+1; row <= ToLines; row++) {
win->_line[row].text = 0;
win->_line[row].firstchar = 0;
win->_line[row].lastchar = ToCols;
if ((win->_flags & _SUBWIN)) {
win->_line[row].text =
&pline[win->_begy + row].text[win->_begx];
}
}
}
/*
* Adjust the width of the columns:
*/
blank = _nc_background(win);
for (row = 0; row <= ToLines; row++) {
chtype *s = win->_line[row].text;
int begin = (s == 0) ? 0 : size_x + 1;
int end = ToCols;
if_USE_SCROLL_HINTS(win->_line[row].oldindex = row);
if (ToCols != size_x || s == 0) {
if (! (win->_flags & _SUBWIN)) {
win->_line[row].text = s = c_ALLOC(s, ToCols+1);
if (win->_line[row].text == 0)
returnCode(ERR);
} else if (s == 0) {
win->_line[row].text = s =
&pline[win->_begy + row].text[win->_begx];
}
if (end >= begin) { /* growing */
if (win->_line[row].firstchar < begin)
win->_line[row].firstchar = begin;
win->_line[row].lastchar = ToCols;
do {
s[end] = blank;
} while (--end >= begin);
} else { /* shrinking */
win->_line[row].firstchar = 0;
win->_line[row].lastchar = ToCols;
}
}
}
/*
* Finally, adjust the parameters showing screen size and cursor
* position:
*/
win->_maxx = ToCols;
win->_maxy = ToLines;
if (win->_regtop > win->_maxy)
win->_regtop = win->_maxy;
if (win->_regbottom > win->_maxy
|| win->_regbottom == size_y)
win->_regbottom = win->_maxy;
if (win->_curx > win->_maxx)
win->_curx = win->_maxx;
if (win->_cury > win->_maxy)
win->_cury = win->_maxy;
#ifdef TRACE
TR(TRACE_UPDATE, ("...beg (%d, %d), max(%d,%d), reg(%d,%d)",
win->_begy, win->_begx,
win->_maxy, win->_maxx,
win->_regtop, win->_regbottom));
if (_nc_tracing & TRACE_UPDATE)
_tracedump("...after:", win);
#endif
returnCode(OK);
}
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