diff options
Diffstat (limited to 'lib/libcurses/newwin.c')
| -rw-r--r-- | lib/libcurses/newwin.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/lib/libcurses/newwin.c b/lib/libcurses/newwin.c new file mode 100644 index 000000000000..dfa7e75e63bf --- /dev/null +++ b/lib/libcurses/newwin.c @@ -0,0 +1,235 @@ +/* + * Copyright (c) 1981 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)newwin.c 5.4 (Berkeley) 6/1/90"; +#endif /* not lint */ + +/* + * allocate space for and set up defaults for a new window + * + */ + +# include "curses.ext" + +char *malloc(); + +# define SMALLOC (short *) malloc + +static WINDOW *makenew(); + +# 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 chtype *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] = (chtype *) malloc(nc * sizeof(chtype))) == 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 int i; + 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() + */ +_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 int i; + 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 = (chtype **) malloc(nl * sizeof(chtype *))) == 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; +} + +_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; + } +} |