diff options
Diffstat (limited to 'ncurses-5.3/ncurses/base/lib_overlay.c')
| -rw-r--r-- | ncurses-5.3/ncurses/base/lib_overlay.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/ncurses-5.3/ncurses/base/lib_overlay.c b/ncurses-5.3/ncurses/base/lib_overlay.c new file mode 100644 index 0000000..a0f4071 --- /dev/null +++ b/ncurses-5.3/ncurses/base/lib_overlay.c @@ -0,0 +1,184 @@ +/**************************************************************************** + * Copyright (c) 1998-2001,2002 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("$Id$") + +static int +overlap(const WINDOW *const s, WINDOW *const d, int const flag) +{ + int sx1, sy1, sx2, sy2; + int dx1, dy1, dx2, dy2; + int sminrow, smincol; + int dminrow, dmincol; + int dmaxrow, dmaxcol; + + T((T_CALLED("overlap(%p,%p,%d)"), s, d, flag)); + + if (s == 0 || d == 0) { + returnCode(ERR); + } else { + T(("src : begy %d, begx %d, maxy %d, maxx %d", + s->_begy, s->_begx, s->_maxy, s->_maxx)); + T(("dst : begy %d, begx %d, maxy %d, maxx %d", + d->_begy, d->_begx, d->_maxy, d->_maxx)); + + sx1 = s->_begx; + sy1 = s->_begy; + sx2 = sx1 + s->_maxx; + sy2 = sy1 + s->_maxy; + + dx1 = d->_begx; + dy1 = d->_begy; + dx2 = dx1 + d->_maxx; + dy2 = dy1 + d->_maxy; + + if (dx2 < sx1 || dx1 > sx2 || dy2 < sy1 || dy1 > sy2) { + returnCode(ERR); /* No intersection */ + } else { + sminrow = max(sy1, dy1) - sy1; + smincol = max(sx1, dx1) - sx1; + dminrow = max(sy1, dy1) - dy1; + dmincol = max(sx1, dx1) - dx1; + dmaxrow = min(sy2, dy2) - dy1; + dmaxcol = min(sx2, dx2) - dx1; + + returnCode(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. +** +**/ + +NCURSES_EXPORT(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. +** +**/ + +NCURSES_EXPORT(int) +overwrite(const WINDOW *win1, WINDOW *win2) +{ + T((T_CALLED("overwrite(%p,%p)"), win1, win2)); + returnCode(overlap(win1, win2, FALSE)); +} + +NCURSES_EXPORT(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; + attr_t bk = AttrOf(dst->_nc_bkgd); + attr_t mask = ~(attr_t) ((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 ((CharOf(src->_line[sy].text[sx]) != L(' ')) && + (!CharEq(dst->_line[dy].text[dx], src->_line[sy].text[sx]))) { + dst->_line[dy].text[dx] = src->_line[sy].text[sx]; + SetAttr(dst->_line[dy].text[dx], + (AttrOf(src->_line[sy].text[sx]) & mask) | bk); + touched = TRUE; + } + } else { + if (!CharEq(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, dminrow, (dmaxrow - dminrow + 1)); + } + } + T(("finished copywin")); + returnCode(OK); +} |