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- /*
- * Copyright (c) 1981 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)newwin.c 5.3 (Berkeley) 6/30/88";
- #endif /* not lint */
-
- /*
- * allocate space for and set up defaults for a new window
- *
- */
-
- # include "curses.ext"
-
- #ifdef __STDC__
- #include <stdlib.h>
- #include <memory.h>
- #else
- char *malloc();
- #endif
-
- # define SMALLOC (short *) malloc
-
- static WINDOW *makenew __PROTO((int num_lines, int num_cols, int begy, int begx));
-
- # undef nl /* don't need it here, and it interferes */
-
- WINDOW *
- newwin(num_lines, num_cols, begy, begx)
- int num_lines, num_cols, begy, begx;
- {
- reg WINDOW *win;
- reg char *sp;
- reg int i, by, bx, nl, nc;
- reg int j;
-
- by = begy;
- bx = begx;
- nl = num_lines;
- nc = num_cols;
-
- if (nl == 0)
- nl = LINES - by;
- if (nc == 0)
- nc = COLS - bx;
- if ((win = makenew(nl, nc, by, bx)) == NULL)
- return ERR;
- if ((win->_firstch = SMALLOC(nl * sizeof win->_firstch[0])) == NULL) {
- free(win->_y);
- free(win);
- return NULL;
- }
- if ((win->_lastch = SMALLOC(nl * sizeof win->_lastch[0])) == NULL) {
- free(win->_y);
- free(win->_firstch);
- free(win);
- return NULL;
- }
- win->_nextp = win;
- for (i = 0; i < nl; i++) {
- win->_firstch[i] = _NOCHANGE;
- win->_lastch[i] = _NOCHANGE;
- }
- for (i = 0; i < nl; i++)
- if ((win->_y[i] = malloc(nc * sizeof win->_y[0])) == NULL) {
- for (j = 0; j < i; j++)
- free(win->_y[j]);
- free(win->_firstch);
- free(win->_lastch);
- free(win->_y);
- free(win);
- return ERR;
- }
- else
- for (sp = win->_y[i]; sp < win->_y[i] + nc; )
- *sp++ = ' ';
- win->_ch_off = 0;
- # ifdef DEBUG
- fprintf(outf, "NEWWIN: win->_ch_off = %d\n", win->_ch_off);
- # endif
- return win;
- }
-
- WINDOW *
- subwin(orig, num_lines, num_cols, begy, begx)
- reg WINDOW *orig;
- int num_lines, num_cols, begy, begx;
- {
- reg WINDOW *win;
- reg int by, bx, nl, nc;
-
- by = begy;
- bx = begx;
- nl = num_lines;
- nc = num_cols;
-
- /*
- * make sure window fits inside the original one
- */
- # ifdef DEBUG
- fprintf(outf, "SUBWIN(%0.2o, %d, %d, %d, %d)\n", orig, nl, nc, by, bx);
- # endif
- if (by < orig->_begy || bx < orig->_begx
- || by + nl > orig->_maxy + orig->_begy
- || bx + nc > orig->_maxx + orig->_begx)
- return ERR;
- if (nl == 0)
- nl = orig->_maxy + orig->_begy - by;
- if (nc == 0)
- nc = orig->_maxx + orig->_begx - bx;
- if ((win = makenew(nl, nc, by, bx)) == NULL)
- return ERR;
- win->_nextp = orig->_nextp;
- orig->_nextp = win;
- win->_orig = orig;
- _set_subwin_(orig, win);
- return win;
- }
-
- /*
- * this code is shared with mvwin()
- */
- void _set_subwin_(orig, win)
- register WINDOW *orig, *win;
- {
- register int i, j, k;
-
- j = win->_begy - orig->_begy;
- k = win->_begx - orig->_begx;
- win->_ch_off = k;
- # ifdef DEBUG
- fprintf(outf, "_SET_SUBWIN_: win->_ch_off = %d\n", win->_ch_off);
- # endif
- win->_firstch = &orig->_firstch[j];
- win->_lastch = &orig->_lastch[j];
- for (i = 0; i < win->_maxy; i++, j++)
- win->_y[i] = &orig->_y[j][k];
-
- }
-
- /*
- * This routine sets up a window buffer and returns a pointer to it.
- */
- static WINDOW *
- makenew(num_lines, num_cols, begy, begx)
- int num_lines, num_cols, begy, begx; {
-
- reg WINDOW *win;
- reg int by, bx, nl, nc;
-
- by = begy;
- bx = begx;
- nl = num_lines;
- nc = num_cols;
-
- # ifdef DEBUG
- fprintf(outf, "MAKENEW(%d, %d, %d, %d)\n", nl, nc, by, bx);
- # endif
- if ((win = (WINDOW *) malloc(sizeof *win)) == NULL)
- return NULL;
- # ifdef DEBUG
- fprintf(outf, "MAKENEW: nl = %d\n", nl);
- # endif
- if ((win->_y = (char **) malloc(nl * sizeof win->_y[0])) == NULL) {
- free(win);
- return NULL;
- }
- # ifdef DEBUG
- fprintf(outf, "MAKENEW: nc = %d\n", nc);
- # endif
- win->_cury = win->_curx = 0;
- win->_clear = FALSE;
- win->_maxy = nl;
- win->_maxx = nc;
- win->_begy = by;
- win->_begx = bx;
- win->_flags = 0;
- win->_scroll = win->_leave = FALSE;
- _swflags_(win);
- # ifdef DEBUG
- fprintf(outf, "MAKENEW: win->_clear = %d\n", win->_clear);
- fprintf(outf, "MAKENEW: win->_leave = %d\n", win->_leave);
- fprintf(outf, "MAKENEW: win->_scroll = %d\n", win->_scroll);
- fprintf(outf, "MAKENEW: win->_flags = %0.2o\n", win->_flags);
- fprintf(outf, "MAKENEW: win->_maxy = %d\n", win->_maxy);
- fprintf(outf, "MAKENEW: win->_maxx = %d\n", win->_maxx);
- fprintf(outf, "MAKENEW: win->_begy = %d\n", win->_begy);
- fprintf(outf, "MAKENEW: win->_begx = %d\n", win->_begx);
- # endif
- return win;
- }
-
- void _swflags_(win)
- register WINDOW *win;
- {
- win->_flags &= ~(_ENDLINE|_FULLLINE|_FULLWIN|_SCROLLWIN);
- if (win->_begx + win->_maxx == COLS) {
- win->_flags |= _ENDLINE;
- if (win->_begx == 0) {
- if (AL && DL)
- win->_flags |= _FULLLINE;
- if (win->_maxy == LINES && win->_begy == 0)
- win->_flags |= _FULLWIN;
- }
- if (win->_begy + win->_maxy == LINES)
- win->_flags |= _SCROLLWIN;
- }
- }
-