--- /dev/null
+/****************************************************************************
+ * 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: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
+ * and: Eric S. Raymond <esr@snark.thyrsus.com> *
+ ****************************************************************************/
+
+
+/*
+** lib_overlay.c
+**
+** The routines overlay(), copywin(), and overwrite().
+**
+*/
+
+#include <curses.priv.h>
+
+MODULE_ID("$Id: lib_overlay.c,v 1.12 1998/02/11 12:13:59 tom Exp $")
+
+static int overlap(const WINDOW *const s, WINDOW *const d, int const flag)
+{
+int sminrow, smincol, dminrow, dmincol, dmaxrow, dmaxcol;
+
+ T(("overlap : sby %d, sbx %d, smy %d, smx %d, dby %d, dbx %d, dmy %d, dmx %d",
+ s->_begy, s->_begx, s->_maxy, s->_maxx,
+ d->_begy, d->_begx, d->_maxy, d->_maxx));
+
+ if (!s || !d)
+ returnCode(ERR);
+
+ sminrow = max(s->_begy, d->_begy) - s->_begy;
+ smincol = max(s->_begx, d->_begx) - s->_begx;
+ dminrow = max(s->_begy, d->_begy) - d->_begy;
+ dmincol = max(s->_begx, d->_begx) - d->_begx;
+ dmaxrow = min(s->_maxy+s->_begy, d->_maxy+d->_begy) - d->_begy;
+ dmaxcol = min(s->_maxx+s->_begx, d->_maxx+d->_begx) - d->_begx;
+
+ return(copywin(s, d,
+ sminrow, smincol, dminrow, dmincol, dmaxrow, dmaxcol,
+ flag));
+}
+
+/*
+**
+** overlay(win1, win2)
+**
+**
+** overlay() writes the overlapping area of win1 behind win2
+** on win2 non-destructively.
+**
+**/
+
+int overlay(const WINDOW *win1, WINDOW *win2)
+{
+ T((T_CALLED("overlay(%p,%p)"), win1, win2));
+ returnCode(overlap(win1, win2, TRUE));
+}
+
+/*
+**
+** overwrite(win1, win2)
+**
+**
+** overwrite() writes the overlapping area of win1 behind win2
+** on win2 destructively.
+**
+**/
+
+int overwrite(const WINDOW *win1, WINDOW *win2)
+{
+ T((T_CALLED("overwrite(%p,%p)"), win1, win2));
+ returnCode(overlap(win1, win2, FALSE));
+}
+
+int copywin(const WINDOW *src, WINDOW *dst,
+ int sminrow, int smincol,
+ int dminrow, int dmincol, int dmaxrow, int dmaxcol,
+ int over)
+{
+int sx, sy, dx, dy;
+bool touched;
+chtype bk = AttrOf(dst->_bkgd);
+chtype mask = ~(chtype)((bk&A_COLOR) ? A_COLOR : 0);
+
+ T((T_CALLED("copywin(%p, %p, %d, %d, %d, %d, %d, %d, %d)"),
+ src, dst, sminrow, smincol, dminrow, dmincol, dmaxrow, dmaxcol, over));
+
+ if (!src || !dst)
+ returnCode(ERR);
+
+ /* make sure rectangle exists in source */
+ if ((sminrow + dmaxrow - dminrow) > (src->_maxy + 1) ||
+ (smincol + dmaxcol - dmincol) > (src->_maxx + 1)) {
+ returnCode(ERR);
+ }
+
+ T(("rectangle exists in source"));
+
+ /* make sure rectangle fits in destination */
+ if (dmaxrow > dst->_maxy || dmaxcol > dst->_maxx) {
+ returnCode(ERR);
+ }
+
+ T(("rectangle fits in destination"));
+
+ for (dy = dminrow, sy = sminrow; dy <= dmaxrow; sy++, dy++) {
+ touched = FALSE;
+ for(dx=dmincol, sx=smincol; dx <= dmaxcol; sx++, dx++)
+ {
+ if (over)
+ {
+ if ((TextOf(src->_line[sy].text[sx]) != ' ') &&
+ (dst->_line[dy].text[dx]!=src->_line[sy].text[sx]))
+ {
+ dst->_line[dy].text[dx] =
+ (src->_line[sy].text[sx] & mask) | bk;
+ touched = TRUE;
+ }
+ }
+ else {
+ if (dst->_line[dy].text[dx] != src->_line[sy].text[sx])
+ {
+ dst->_line[dy].text[dx] = src->_line[sy].text[sx];
+ touched = TRUE;
+ }
+ }
+ }
+ if (touched)
+ {
+ touchline(dst,0,getmaxy(dst));
+ }
+ }
+ T(("finished copywin"));
+ returnCode(OK);
+}
projects / ncurses.git / blobdiff