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File: [cvs.NetBSD.org] / src / lib / libcurses / background.c (download)

Revision 1.25, Mon Nov 19 20:37:04 2018 UTC (2 years, 10 months ago) by uwe
Branch: MAIN
CVS Tags: phil-wifi-20200421, phil-wifi-20200411, phil-wifi-20200406, phil-wifi-20191119, phil-wifi-20190609, pgoyette-compat-20190127, pgoyette-compat-20190118, pgoyette-compat-1226, pgoyette-compat-1126, netbsd-9-base, netbsd-9-2-RELEASE, netbsd-9-1-RELEASE, netbsd-9-0-RELEASE, netbsd-9-0-RC2, netbsd-9-0-RC1, netbsd-9, is-mlppp-base, is-mlppp, cjep_sun2x-base1, cjep_sun2x-base, cjep_sun2x, cjep_staticlib_x-base1, cjep_staticlib_x-base, cjep_staticlib_x
Changes since 1.24: +17 -16 lines

wbkgd - when updating window rendition for the new background character,
it's the old background characters that need to be updated, not spaces.

While here, simplify and also fix the bug introduced in 1.20 (that
lost the default color) - actually use the results of wbkgdset().

/*	$NetBSD: background.c,v 1.25 2018/11/19 20:37:04 uwe Exp $	*/

/*-
 * Copyright (c) 2000 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Julian Coleman.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: background.c,v 1.25 2018/11/19 20:37:04 uwe Exp $");
#endif				/* not lint */

#include <stdlib.h>
#include "curses.h"
#include "curses_private.h"

/*
 * bkgdset
 *	Set new background attributes on stdscr.
 */
void
bkgdset(chtype ch)
{
	wbkgdset(stdscr, ch);
}

/*
 * bkgd --
 *	Set new background attributes on stdscr and apply them to its
 *	contents.
 */
int
bkgd(chtype ch)
{
	return(wbkgd(stdscr, ch));
}

/*
 * wbkgdset
 *	Set new background attributes on the specified window.
 */
void
wbkgdset(WINDOW *win, chtype ch)
{
#ifdef DEBUG
	__CTRACE(__CTRACE_ATTR, "wbkgdset: (%p), '%s', %08x\n",
	    win, unctrl(ch & __CHARTEXT), ch & __ATTRIBUTES);
#endif

	/* Background character. */
	if (ch & __CHARTEXT)
		win->bch = (wchar_t) ch & __CHARTEXT;

	/* Background attributes (check colour). */
	if (__using_color && !(ch & __COLOR))
		ch |= __default_color;
	win->battr = (attr_t) ch & __ATTRIBUTES;
}

/*
 * wbkgd --
 *	Set new background attributes on the specified window and
 *	apply them to its contents.
 */
int
wbkgd(WINDOW *win, chtype ch)
{
	chtype obch;
	int y, x;

#ifdef DEBUG
	__CTRACE(__CTRACE_ATTR, "wbkgd: (%p), '%s', %08x\n",
	    win, unctrl(ch & __CHARTEXT), ch & __ATTRIBUTES);
#endif
	obch = win->bch;
	wbkgdset(win, ch);

	for (y = 0; y < win->maxy; y++) {
		for (x = 0; x < win->maxx; x++) {
			__LDATA *cp = &win->alines[y]->line[x];

			/* Update/switch background characters */
			if (cp->ch == obch)
				cp->ch = win->bch;

			/* Update/merge attributes */
			cp->attr = win->battr | (cp->attr & __ALTCHARSET);
#ifdef HAVE_WCHAR
			SET_WCOL(*cp, 1);
#endif
		}
	}
	__touchwin(win);
	return OK;
}

/*
 * getbkgd --
 *	Get current background attributes.
 */
chtype
getbkgd(WINDOW *win)
{
	attr_t	battr;

	/* Background attributes (check colour). */
	battr = win->battr & A_ATTRIBUTES;
	if (__using_color && ((battr & __COLOR) == __default_color))
		battr &= ~__COLOR;

	return ((chtype) ((win->bch & A_CHARTEXT) | battr));
}


#ifdef HAVE_WCHAR

void
bkgrndset(const cchar_t *wch)
{
	wbkgrndset(stdscr, wch);
}


int
bkgrnd(const cchar_t *wch)
{
	return wbkgrnd(stdscr, wch);
}


int
getbkgrnd(cchar_t *wch)
{
	return wgetbkgrnd(stdscr, wch);
}


void
wbkgrndset(WINDOW *win, const cchar_t *wch)
{
	attr_t battr;
	nschar_t *np, *tnp;
	int i;

#ifdef DEBUG
	__CTRACE(__CTRACE_ATTR, "wbkgrndset: (%p), '%s', %x\n",
		win, (const char *) wunctrl(wch), wch->attributes);
#endif

	/* ignore multi-column characters */
	if (!wch->elements || wcwidth(wch->vals[0]) > 1)
		return;

	/* Background character. */
	tnp = np = win->bnsp;
	if (wcwidth( wch->vals[0]))
		win->bch = wch->vals[0];
	else {
		if (!np) {
			np = malloc(sizeof(nschar_t));
			if (!np)
				return;
			np->next = NULL;
			win->bnsp = np;
		}
		np->ch = wch->vals[0];
		tnp = np;
		np = np->next;
	}
	/* add non-spacing characters */
	if (wch->elements > 1) {
		for (i = 1; i < wch->elements; i++) {
			if ( !np ) {
				np = malloc(sizeof(nschar_t));
				if (!np)
					return;
				np->next = NULL;
				if (tnp)
					tnp->next = np;
				else
					win->bnsp = np;
			}
			np->ch = wch->vals[i];
			tnp = np;
			np = np->next;
		}
	}
	/* clear the old non-spacing characters */
	while (np) {
		tnp = np->next;
		free(np);
		np = tnp;
	}

	/* Background attributes (check colour). */
	battr = wch->attributes & WA_ATTRIBUTES;
	if (__using_color && !( battr & __COLOR))
		battr |= __default_color;
	win->battr = battr;
	SET_BGWCOL((*win), 1);
}


int
wbkgrnd(WINDOW *win, const cchar_t *wch)
{
#ifdef DEBUG
	__CTRACE(__CTRACE_ATTR, "wbkgrnd: (%p), '%s', %x\n",
		win, (const char *) wunctrl(wch), wch->attributes);
#endif

	/* ignore multi-column characters */
	if (!wch->elements || wcwidth( wch->vals[ 0 ]) > 1)
		return ERR;

	wbkgrndset(win, wch);
	__touchwin(win);
	return OK;
}


int
wgetbkgrnd(WINDOW *win, cchar_t *wch)
{
	nschar_t *np;

	/* Background attributes (check colour). */
	wch->attributes = win->battr & WA_ATTRIBUTES;
	if (__using_color && ((wch->attributes & __COLOR) == __default_color))
		wch->attributes &= ~__COLOR;
	wch->vals[0] = win->bch;
	wch->elements = 1;
	np = win->bnsp;
	if (np) {
		while (np && wch->elements < CURSES_CCHAR_MAX) {
			wch->vals[wch->elements++] = np->ch;
			np = np->next;
		}
	}

	return OK;
}

#else  /* !HAVE_WCHAR */

void
bkgrndset(const cchar_t *wch)
{
	return;
}

int
bkgrnd(const cchar_t *wch)
{
	return ERR;
}


int
getbkgrnd(cchar_t *wch)
{
	return ERR;
}


void
wbkgrndset(WINDOW *win, const cchar_t *wch)
{
	return;
}


int
wbkgrnd(WINDOW *win, const cchar_t *wch)
{
	return ERR;
}


int
wgetbkgrnd(WINDOW *win, cchar_t *wch)
{
	return ERR;
}

#endif /* !HAVE_WCHAR */