236 lines
6.2 KiB
C
236 lines
6.2 KiB
C
/*
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* Copyright (c) 1981 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)newwin.c 5.4 (Berkeley) 6/1/90";
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#endif /* not lint */
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/*
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* allocate space for and set up defaults for a new window
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*
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*/
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# include "curses.ext"
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char *malloc();
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# define SMALLOC (short *) malloc
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static WINDOW *makenew();
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# undef nl /* don't need it here, and it interferes */
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WINDOW *
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newwin(num_lines, num_cols, begy, begx)
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int num_lines, num_cols, begy, begx;
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{
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reg WINDOW *win;
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reg char *sp;
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reg int i, by, bx, nl, nc;
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reg int j;
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by = begy;
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bx = begx;
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nl = num_lines;
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nc = num_cols;
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if (nl == 0)
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nl = LINES - by;
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if (nc == 0)
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nc = COLS - bx;
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if ((win = makenew(nl, nc, by, bx)) == NULL)
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return ERR;
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if ((win->_firstch = SMALLOC(nl * sizeof win->_firstch[0])) == NULL) {
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free(win->_y);
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free(win);
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return NULL;
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}
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if ((win->_lastch = SMALLOC(nl * sizeof win->_lastch[0])) == NULL) {
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free(win->_y);
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free(win->_firstch);
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free(win);
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return NULL;
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}
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win->_nextp = win;
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for (i = 0; i < nl; i++) {
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win->_firstch[i] = _NOCHANGE;
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win->_lastch[i] = _NOCHANGE;
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}
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for (i = 0; i < nl; i++)
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if ((win->_y[i] = malloc(nc * sizeof win->_y[0])) == NULL) {
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for (j = 0; j < i; j++)
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free(win->_y[j]);
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free(win->_firstch);
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free(win->_lastch);
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free(win->_y);
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free(win);
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return ERR;
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}
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else
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for (sp = win->_y[i]; sp < win->_y[i] + nc; )
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*sp++ = ' ';
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win->_ch_off = 0;
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# ifdef DEBUG
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fprintf(outf, "NEWWIN: win->_ch_off = %d\n", win->_ch_off);
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# endif
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return win;
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}
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WINDOW *
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subwin(orig, num_lines, num_cols, begy, begx)
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reg WINDOW *orig;
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int num_lines, num_cols, begy, begx;
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{
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reg int i;
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reg WINDOW *win;
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reg int by, bx, nl, nc;
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by = begy;
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bx = begx;
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nl = num_lines;
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nc = num_cols;
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/*
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* make sure window fits inside the original one
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*/
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# ifdef DEBUG
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fprintf(outf, "SUBWIN(%0.2o, %d, %d, %d, %d)\n", orig, nl, nc, by, bx);
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# endif
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if (by < orig->_begy || bx < orig->_begx
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|| by + nl > orig->_maxy + orig->_begy
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|| bx + nc > orig->_maxx + orig->_begx)
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return ERR;
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if (nl == 0)
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nl = orig->_maxy + orig->_begy - by;
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if (nc == 0)
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nc = orig->_maxx + orig->_begx - bx;
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if ((win = makenew(nl, nc, by, bx)) == NULL)
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return ERR;
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win->_nextp = orig->_nextp;
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orig->_nextp = win;
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win->_orig = orig;
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_set_subwin_(orig, win);
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return win;
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}
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/*
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* this code is shared with mvwin()
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*/
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_set_subwin_(orig, win)
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register WINDOW *orig, *win;
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{
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register int i, j, k;
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j = win->_begy - orig->_begy;
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k = win->_begx - orig->_begx;
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win->_ch_off = k;
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# ifdef DEBUG
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fprintf(outf, "_SET_SUBWIN_: win->_ch_off = %d\n", win->_ch_off);
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# endif
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win->_firstch = &orig->_firstch[j];
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win->_lastch = &orig->_lastch[j];
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for (i = 0; i < win->_maxy; i++, j++)
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win->_y[i] = &orig->_y[j][k];
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}
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/*
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* This routine sets up a window buffer and returns a pointer to it.
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*/
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static WINDOW *
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makenew(num_lines, num_cols, begy, begx)
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int num_lines, num_cols, begy, begx; {
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reg int i;
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reg WINDOW *win;
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reg int by, bx, nl, nc;
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by = begy;
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bx = begx;
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nl = num_lines;
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nc = num_cols;
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# ifdef DEBUG
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fprintf(outf, "MAKENEW(%d, %d, %d, %d)\n", nl, nc, by, bx);
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# endif
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if ((win = (WINDOW *) malloc(sizeof *win)) == NULL)
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return NULL;
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# ifdef DEBUG
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fprintf(outf, "MAKENEW: nl = %d\n", nl);
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# endif
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if ((win->_y = (char **) malloc(nl * sizeof win->_y[0])) == NULL) {
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free(win);
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return NULL;
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}
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# ifdef DEBUG
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fprintf(outf, "MAKENEW: nc = %d\n", nc);
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# endif
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win->_cury = win->_curx = 0;
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win->_clear = FALSE;
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win->_maxy = nl;
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win->_maxx = nc;
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win->_begy = by;
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win->_begx = bx;
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win->_flags = 0;
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win->_scroll = win->_leave = FALSE;
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_swflags_(win);
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# ifdef DEBUG
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fprintf(outf, "MAKENEW: win->_clear = %d\n", win->_clear);
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fprintf(outf, "MAKENEW: win->_leave = %d\n", win->_leave);
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fprintf(outf, "MAKENEW: win->_scroll = %d\n", win->_scroll);
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fprintf(outf, "MAKENEW: win->_flags = %0.2o\n", win->_flags);
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fprintf(outf, "MAKENEW: win->_maxy = %d\n", win->_maxy);
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fprintf(outf, "MAKENEW: win->_maxx = %d\n", win->_maxx);
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fprintf(outf, "MAKENEW: win->_begy = %d\n", win->_begy);
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fprintf(outf, "MAKENEW: win->_begx = %d\n", win->_begx);
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# endif
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return win;
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}
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_swflags_(win)
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register WINDOW *win;
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{
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win->_flags &= ~(_ENDLINE|_FULLLINE|_FULLWIN|_SCROLLWIN);
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if (win->_begx + win->_maxx == COLS) {
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win->_flags |= _ENDLINE;
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if (win->_begx == 0) {
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if (AL && DL)
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win->_flags |= _FULLLINE;
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if (win->_maxy == LINES && win->_begy == 0)
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win->_flags |= _FULLWIN;
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}
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if (win->_begy + win->_maxy == LINES)
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win->_flags |= _SCROLLWIN;
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}
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}
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