diff options
Diffstat (limited to 'usr.bin/window/wwdelete.c')
| -rw-r--r-- | usr.bin/window/wwdelete.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/usr.bin/window/wwdelete.c b/usr.bin/window/wwdelete.c new file mode 100644 index 0000000..f659736 --- /dev/null +++ b/usr.bin/window/wwdelete.c @@ -0,0 +1,139 @@ +/* + * Copyright (c) 1983, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Edward Wang at The University of California, Berkeley. + * + * 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[] = "@(#)wwdelete.c 8.1 (Berkeley) 6/6/93"; +#endif /* not lint */ + +#include "ww.h" + +/* + * Pull w free from the cover list. + */ +wwdelete(w) +register struct ww *w; +{ + register i; + + for (i = w->ww_i.t; i < w->ww_i.b; i++) { + register j; + register char *smap = wwsmap[i]; + register union ww_char *ns = wwns[i]; + register int nchanged = 0; + + for (j = w->ww_i.l; j < w->ww_i.r; j++) + if (smap[j] == w->ww_index) { + smap[j] = WWX_NOBODY; + ns[j].c_w = ' '; + nchanged++; + } + if (nchanged > 0) + wwtouched[i] |= WWU_TOUCHED; + } + + { + register struct ww *wp; + + for (wp = w->ww_forw; wp != &wwhead; wp = wp->ww_forw) + wp->ww_order--; + } + + if (w->ww_forw != &wwhead) + wwdelete1(w->ww_forw, + w->ww_i.t, w->ww_i.b, w->ww_i.l, w->ww_i.r); + + w->ww_back->ww_forw = w->ww_forw; + w->ww_forw->ww_back = w->ww_back; + w->ww_forw = w->ww_back = 0; +} + +wwdelete1(w, t, b, l, r) +register struct ww *w; +{ + int i; + int tt, bb, ll, rr; + char hasglass; + +again: + hasglass = 0; + tt = MAX(t, w->ww_i.t); + bb = MIN(b, w->ww_i.b); + ll = MAX(l, w->ww_i.l); + rr = MIN(r, w->ww_i.r); + if (tt >= bb || ll >= rr) { + if ((w = w->ww_forw) == &wwhead) + return; + goto again; + } + for (i = tt; i < bb; i++) { + register j; + register char *smap = wwsmap[i]; + register union ww_char *ns = wwns[i]; + register char *win = w->ww_win[i]; + register union ww_char *buf = w->ww_buf[i]; + int nvis = w->ww_nvis[i]; + int nchanged = 0; + + for (j = ll; j < rr; j++) { + if (smap[j] != WWX_NOBODY) + continue; + if (win[j] & WWM_GLS) { + hasglass = 1; + continue; + } + smap[j] = w->ww_index; + ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT; + nchanged++; + if (win[j] == 0) + nvis++; + } + if (nchanged > 0) + wwtouched[i] |= WWU_TOUCHED; + w->ww_nvis[i] = nvis; + } + if ((w = w->ww_forw) == &wwhead) + return; + if (hasglass) + goto again; + if (tt > t) + wwdelete1(w, t, tt, l, r); + if (bb < b) + wwdelete1(w, bb, b, l, r); + if (ll > l) + wwdelete1(w, tt, bb, l, ll); + if (rr < r) + wwdelete1(w, tt, bb, rr, r); +} |
