xref: /freebsd/contrib/ncurses/ncurses/base/lib_window.c (revision 7a69bbfb278952228c9aa1eca241e65fcdef425e)

/****************************************************************************
 * Copyright (c) 1998,2000 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_window.c
**
**
*/

#include <curses.priv.h>

MODULE_ID("$Id: lib_window.c,v 1.15 2000/12/10 02:43:28 tom Exp $")

NCURSES_EXPORT(void)
_nc_synchook(WINDOW *win)
/* hook to be called after each window change */
{
    if (win->_immed)
	wrefresh(win);
    if (win->_sync)
	wsyncup(win);
}

NCURSES_EXPORT(int)
mvderwin(WINDOW *win, int y, int x)
/* move a derived window */
{
    WINDOW *orig;
    int i;

    T((T_CALLED("mvderwin(%p,%d,%d)"), win, y, x));

    if (win && (orig = win->_parent)) {
	if (win->_parx == x && win->_pary == y)
	    returnCode(OK);
	if (x < 0 || y < 0)
	    returnCode(ERR);
	if ((x + getmaxx(win) > getmaxx(orig)) ||
	    (y + getmaxy(win) > getmaxy(orig)))
	    returnCode(ERR);
    } else
	returnCode(ERR);
    wsyncup(win);
    win->_parx = x;
    win->_pary = y;
    for (i = 0; i < getmaxy(win); i++)
	win->_line[i].text = &(orig->_line[y++].text[x]);
    returnCode(OK);
}

NCURSES_EXPORT(int)
syncok(WINDOW *win, bool bf)
/* enable/disable automatic wsyncup() on each change to window */
{
    T((T_CALLED("syncok(%p,%d)"), win, bf));

    if (win) {
	win->_sync = bf;
	returnCode(OK);
    } else
	returnCode(ERR);
}

NCURSES_EXPORT(void)
wsyncup(WINDOW *win)
/* mark changed every cell in win's ancestors that is changed in win */
/* Rewritten by J. Pfeifer, 1-Apr-96 (don't even think that...)      */
{
    WINDOW *wp;

    if (win && win->_parent)
	for (wp = win; wp->_parent; wp = wp->_parent) {
	    int y;
	    WINDOW *pp = wp->_parent;

	    assert((wp->_pary <= pp->_maxy) &&
		   ((wp->_pary + wp->_maxy) <= pp->_maxy));

	    for (y = 0; y <= wp->_maxy; y++) {
		int left = wp->_line[y].firstchar;
		if (left >= 0) {	/* line is touched */
		    struct ldat *line = &(pp->_line[wp->_pary + y]);
		    /* left & right character in parent window coordinates */
		    int right = wp->_line[y].lastchar + wp->_parx;
		    left += wp->_parx;

		    CHANGED_RANGE(line, left, right);
		}
	    }
	}
}

NCURSES_EXPORT(void)
wsyncdown(WINDOW *win)
/* mark changed every cell in win that is changed in any of its ancestors */
/* Rewritten by J. Pfeifer, 1-Apr-96 (don't even think that...)           */
{
    if (win && win->_parent) {
	WINDOW *pp = win->_parent;
	int y;

	/* This recursion guarantees, that the changes are propagated down-
	   wards from the root to our direct parent. */
	wsyncdown(pp);

	/* and now we only have to propagate the changes from our direct
	   parent, if there are any. */
	assert((win->_pary <= pp->_maxy) &&
	       ((win->_pary + win->_maxy) <= pp->_maxy));

	for (y = 0; y <= win->_maxy; y++) {
	    if (pp->_line[win->_pary + y].firstchar >= 0) {	/* parent changed */
		struct ldat *line = &(win->_line[y]);
		/* left and right character in child coordinates */
		int left = pp->_line[win->_pary + y].firstchar - win->_parx;
		int right = pp->_line[win->_pary + y].lastchar - win->_parx;
		/* The change maybe outside the childs range */
		if (left < 0)
		    left = 0;
		if (right > win->_maxx)
		    right = win->_maxx;
		CHANGED_RANGE(line, left, right);
	    }
	}
    }
}

NCURSES_EXPORT(void)
wcursyncup(WINDOW *win)
/* sync the cursor in all derived windows to its value in the base window */
{
    WINDOW *wp;
    for (wp = win; wp && wp->_parent; wp = wp->_parent) {
	wmove(wp->_parent, wp->_pary + wp->_cury, wp->_parx + wp->_curx);
    }
}

NCURSES_EXPORT(WINDOW *)
dupwin(WINDOW *win)
/* make an exact duplicate of the given window */
{
    WINDOW *nwin;
    size_t linesize;
    int i;

    T((T_CALLED("dupwin(%p)"), win));

    if ((win == NULL) ||
	((nwin = newwin(win->_maxy + 1, win->_maxx + 1, win->_begy,
	 win->_begx)) == NULL))
	returnWin(0);

    nwin->_curx = win->_curx;
    nwin->_cury = win->_cury;
    nwin->_maxy = win->_maxy;
    nwin->_maxx = win->_maxx;
    nwin->_begy = win->_begy;
    nwin->_begx = win->_begx;
    nwin->_yoffset = win->_yoffset;

    nwin->_flags = win->_flags & ~_SUBWIN;
    /* Due to the use of newwin(), the clone is not a subwindow.
     * The text is really copied into the clone.
     */

    nwin->_attrs = win->_attrs;
    nwin->_bkgd = win->_bkgd;

    nwin->_clear = win->_clear;
    nwin->_scroll = win->_scroll;
    nwin->_leaveok = win->_leaveok;
    nwin->_use_keypad = win->_use_keypad;
    nwin->_delay = win->_delay;
    nwin->_immed = win->_immed;
    nwin->_sync = win->_sync;

    nwin->_parx = 0;
    nwin->_pary = 0;
    nwin->_parent = (WINDOW *) 0;
    /* See above: the clone isn't a subwindow! */

    nwin->_regtop = win->_regtop;
    nwin->_regbottom = win->_regbottom;

    linesize = (win->_maxx + 1) * sizeof(chtype);
    for (i = 0; i <= nwin->_maxy; i++) {
	memcpy(nwin->_line[i].text, win->_line[i].text, linesize);
	nwin->_line[i].firstchar = win->_line[i].firstchar;
	nwin->_line[i].lastchar = win->_line[i].lastchar;
    }

    returnWin(nwin);
}