NetBSD-5.0.2/lib/libcurses/ins_wch.c
/* $NetBSD: ins_wch.c,v 1.3 2007/05/29 11:10:56 blymn Exp $ */
/*
* Copyright (c) 2005 The NetBSD Foundation Inc.
* All rights reserved.
*
* This code is derived from code donated to the NetBSD Foundation
* by Ruibiao Qiu <ruibiao@arl.wustl.edu,ruibiao@gmail.com>.
*
*
* 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.
* 3. Neither the name of the NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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 REGENTS 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: ins_wch.c,v 1.3 2007/05/29 11:10:56 blymn Exp $");
#endif /* not lint */
#include <string.h>
#include <stdlib.h>
#include "curses.h"
#include "curses_private.h"
/*
* ins_wch --
* Do an insert-char on the line, leaving (cury, curx) unchanged.
*/
int
ins_wch(const cchar_t *wch)
{
#ifndef HAVE_WCHAR
return ERR;
#else
return wins_wch(stdscr, wch);
#endif /* HAVE_WCHAR */
}
/*
* mvins_wch --
* Do an insert-char on the line at (y, x).
*/
int
mvins_wch(int y, int x, const cchar_t *wch)
{
#ifndef HAVE_WCHAR
return ERR;
#else
return mvwins_wch(stdscr, y, x, wch);
#endif /* HAVE_WCHAR */
}
/*
* mvwins_wch --
* Do an insert-char on the line at (y, x) in the given window.
*/
int
mvwins_wch(WINDOW *win, int y, int x, const cchar_t *wch)
{
#ifndef HAVE_WCHAR
return ERR;
#else
if (wmove(win, y, x) == ERR)
return ERR;
return wins_wch(stdscr, wch);
#endif /* HAVE_WCHAR */
}
/*
* wins_wch --
* Do an insert-char on the line, leaving (cury, curx) unchanged.
*/
int
wins_wch(WINDOW *win, const cchar_t *wch)
{
#ifndef HAVE_WCHAR
return ERR;
#else
__LDATA *start, *temp1, *temp2;
__LINE *lnp;
int cw, pcw, x, y, sx, ex, newx, i;
nschar_t *np, *tnp;
wchar_t ws[] = L" ";
/* check for non-spacing characters */
if ( !wch )
return OK;
cw = wcwidth(wch->vals[0]);
if (!cw)
return wadd_wch( win, wch );
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT, "--before--\n");
for ( x = 0; x < win->maxx; x++ )
__CTRACE(__CTRACE_INPUT, "wins_wch: (0,%d)=(%x,%x,%p)\n", x,
win->lines[0]->line[x].ch,
win->lines[0]->line[x].attr,
win->lines[0]->line[x].nsp);
#endif /* DEBUG */
x = win->curx;
y = win->cury;
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT, "wins_wch: (%d,%d)\n", y, x);
#endif /* DEBUG */
switch ( wch->vals[ 0 ]) {
case L'\b':
if ( --x < 0 )
x = 0;
win->curx = x;
return OK;
case L'\r':
win->curx = 0;
return OK;
case L'\n':
wclrtoeol( win );
if (y == win->scr_b) {
if (!(win->flags & __SCROLLOK))
return ERR;
scroll(win);
}
return OK;
case L'\t':
if (wins_nwstr(win, ws, min(win->maxx - x, 8-(x % 8)))
== ERR)
return ERR;
return OK;
}
/* locate current cell */
x = win->curx;
y = win->cury;
lnp = win->lines[ y ];
start = &win->lines[ y ]->line[ x ];
sx = x;
pcw = WCOL( *start );
if (pcw < 0) {
start += pcw;
sx += pcw;
}
if ( cw > win->maxx - sx )
return ERR;
lnp->flags |= __ISDIRTY;
newx = sx + win->ch_off;
if ( newx < *lnp->firstchp )
*lnp->firstchp = newx;
/* shift all complete characters */
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT, "wins_wch: shift all characters\n");
#endif /* DEBUG */
temp1 = &win->lines[ y ]->line[ win->maxx - 1 ];
temp2 = temp1 - cw;
pcw = WCOL(*(temp2 + 1));
if (pcw < 0) {
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT, "wins_wch: clear EOL\n");
#endif /* DEBUG */
temp2 += pcw;
while ( temp1 > temp2 + cw ) {
np = temp1->nsp;
if (np) {
while ( np ) {
tnp = np->next;
free( np );
np = tnp;
}
temp1->nsp = NULL;
}
temp1->ch = ( wchar_t )btowc(( int ) win->bch );
if (_cursesi_copy_nsp(win->bnsp, temp1) == ERR)
return ERR;
temp1->attr = win->battr;
SET_WCOL( *temp1, 1 );
temp1--;
}
}
while ( temp2 >= start ) {
( void )memcpy( temp1, temp2, sizeof( __LDATA ));
temp1--, temp2--;
}
/* update character under cursor */
start->nsp = NULL;
start->ch = wch->vals[ 0 ];
start->attr = wch->attributes & WA_ATTRIBUTES;
SET_WCOL( *start, cw );
if ( wch->elements > 1 ) {
for ( i = 1; i < wch->elements; i++ ) {
np = (nschar_t *)malloc(sizeof(nschar_t));
if (!np)
return ERR;
np->ch = wch->vals[ i ];
np->next = start->nsp;
start->nsp = np;
}
}
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT, "wins_wch: insert (%x,%x,%p)\n",
start->ch, start->attr, start->nsp);
#endif /* DEBUG */
temp1 = start + 1;
ex = x + 1;
while ( ex - x < cw ) {
temp1->ch = wch->vals[ 0 ];
SET_WCOL( *temp1, x - ex );
temp1->nsp = NULL;
ex++, temp1++;
}
#ifdef DEBUG
{
__CTRACE(__CTRACE_INPUT, "--after---\n");
for ( x = 0; x < win->maxx; x++ )
__CTRACE(__CTRACE_INPUT,
"wins_wch: (0,%d)=(%x,%x,%p)\n", x,
win->lines[0]->line[x].ch,
win->lines[0]->line[x].attr,
win->lines[0]->line[x].nsp);
}
#endif /* DEBUG */
newx = win->maxx - 1 + win->ch_off;
if ( newx > *lnp->lastchp )
*lnp->lastchp = newx;
__touchline(win, y, sx, (int) win->maxx - 1);
return OK;
#endif /* HAVE_WCHAR */
}