diff options
Diffstat (limited to 'contrib/ncurses/ncurses/base/lib_overlay.c')
| -rw-r--r-- | contrib/ncurses/ncurses/base/lib_overlay.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/contrib/ncurses/ncurses/base/lib_overlay.c b/contrib/ncurses/ncurses/base/lib_overlay.c new file mode 100644 index 000000000000..db2dce1b79f6 --- /dev/null +++ b/contrib/ncurses/ncurses/base/lib_overlay.c @@ -0,0 +1,161 @@ +/**************************************************************************** + * 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); +} |