422 lines
9.2 KiB
C
422 lines
9.2 KiB
C
/* $NetBSD: ins_wstr.c,v 1.24 2022/10/19 06:09:27 blymn Exp $ */
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/*
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* Copyright (c) 2005 The NetBSD Foundation Inc.
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* All rights reserved.
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*
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* This code is derived from code donated to the NetBSD Foundation
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* by Ruibiao Qiu <ruibiao@arl.wustl.edu,ruibiao@gmail.com>.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
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* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: ins_wstr.c,v 1.24 2022/10/19 06:09:27 blymn Exp $");
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#endif /* not lint */
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#include <string.h>
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#include <stdlib.h>
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#include "curses.h"
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#include "curses_private.h"
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/*
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* ins_wstr --
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* insert a multi-character wide-character string into the current window
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*/
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int
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ins_wstr(const wchar_t *wstr)
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{
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return wins_wstr(stdscr, wstr);
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}
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/*
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* ins_nwstr --
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* insert a multi-character wide-character string into the current window
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* with at most n characters
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*/
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int
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ins_nwstr(const wchar_t *wstr, int n)
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{
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return wins_nwstr(stdscr, wstr, n);
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}
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/*
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* mvins_wstr --
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* Do an insert-string on the line at (y, x).
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*/
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int
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mvins_wstr(int y, int x, const wchar_t *wstr)
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{
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return mvwins_wstr(stdscr, y, x, wstr);
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}
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/*
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* mvins_nwstr --
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* Do an insert-n-string on the line at (y, x).
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*/
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int
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mvins_nwstr(int y, int x, const wchar_t *wstr, int n)
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{
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return mvwins_nwstr(stdscr, y, x, wstr, n);
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}
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/*
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* mvwins_wstr --
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* Do an insert-string on the line at (y, x) in the given window.
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*/
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int
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mvwins_wstr(WINDOW *win, int y, int x, const wchar_t *wstr)
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{
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if (wmove(win, y, x) == ERR)
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return ERR;
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return wins_wstr(win, wstr);
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}
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/*
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* mvwins_nwstr --
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* Do an insert-n-string on the line at (y, x) in the given window.
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*/
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int
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mvwins_nwstr(WINDOW *win, int y, int x, const wchar_t *wstr, int n)
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{
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if (wmove(win, y, x) == ERR)
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return ERR;
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return wins_nwstr(win, wstr, n);
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}
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/*
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* wins_wstr --
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* Do an insert-string on the line, leaving (cury, curx) unchanged.
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*/
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int
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wins_wstr(WINDOW *win, const wchar_t *wstr)
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{
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return wins_nwstr(win, wstr, -1);
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}
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/*
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* wins_nwstr --
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* Do an insert-n-string on the line, leaving (cury, curx) unchanged.
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*/
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int
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wins_nwstr(WINDOW *win, const wchar_t *wstr, int n)
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{
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__LDATA *start, *temp1, *temp2;
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__LINE *lnp;
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const wchar_t *scp;
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cchar_t cc;
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wchar_t *lstr, *slstr;
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int width, len, lx, sx, x, y, tx, ty, cw, pcw, newx, tn, w;
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wchar_t ws[] = L" ";
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/* check for leading non-spacing character */
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if (!wstr)
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return OK;
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cw = wcwidth(*wstr);
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if (cw < 0)
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cw = 1;
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if (!cw)
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return ERR;
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lstr = malloc(sizeof(wchar_t) * win->maxx);
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if (lstr == NULL)
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return ERR;
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scp = wstr + 1;
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width = cw;
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len = 1;
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n--;
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y = win->cury;
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x = win->curx;
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tn = n;
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/*
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* Firstly, make sure the string will fit...
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*/
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while (*scp) {
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if (!tn)
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break;
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switch (*scp) {
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case L'\b':
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if (--x < 0)
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x = 0;
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cw = wcwidth(*(scp - 1));
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if (cw < 0)
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cw = 1;
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width -= cw;
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scp++;
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continue;
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case L'\r':
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width = 0;
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x = 0;
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scp++;
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continue;
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case L'\n':
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if (y == win->scr_b) {
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if (!(win->flags & __SCROLLOK)) {
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free(lstr);
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return ERR;
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}
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}
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y++;
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scp++;
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continue;
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case L'\t':
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cw = wcwidth(ws[0]);
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if (cw < 0)
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cw = 1;
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w = cw * (TABSIZE - (x % TABSIZE));
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width += w;
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x += w;
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scp++;
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continue;
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}
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w = wcwidth(*scp);
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if (w < 0)
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w = 1;
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tn--, width += w;
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scp++;
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}
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__CTRACE(__CTRACE_INPUT, "wins_nwstr: width=%d,len=%d\n", width, len);
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if (width > win->maxx - win->curx + 1) {
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free(lstr);
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return ERR;
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}
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scp = wstr;
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x = win->curx;
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y = win->cury;
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len = 0;
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width = 0;
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slstr = lstr;
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while (*scp && n) {
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lstr = slstr;
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lx = x;
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while (*scp) {
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if (!n)
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break;
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switch (*scp) {
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case L'\b':
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if (--x < 0)
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x = 0;
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if (--len < 0)
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len = 0;
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cw = wcwidth(*(scp - 1));
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if (cw < 0)
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cw = 1;
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width -= cw;
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scp++;
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if (lstr != slstr)
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lstr--;
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continue;
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case L'\r':
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width = 0;
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len = 0;
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x = 0;
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scp++;
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lstr = slstr;
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continue;
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case L'\n':
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goto loopdone;
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case L'\t':
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cw = wcwidth(ws[0]);
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if (cw < 0)
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cw = 1;
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w = cw * (TABSIZE - (x % TABSIZE));
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width += w;
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x += w;
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len += w;
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scp++;
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*lstr = *ws;
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lstr++;
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continue;
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}
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w = wcwidth(*scp);
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if (w < 0)
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w = 1;
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*lstr = *scp;
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n--, len++, width += w;
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scp++, lstr++;
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}
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loopdone:
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start = &win->alines[y]->line[x];
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sx = x;
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lnp = win->alines[y];
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pcw = start->wcols;
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if (pcw < 0) {
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sx += pcw;
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start += pcw;
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}
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__CTRACE(__CTRACE_INPUT, "wins_nwstr: start@(%d)\n", sx);
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pcw = start->wcols;
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lnp->flags |= __ISDIRTY;
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newx = sx + win->ch_off;
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if (newx < *lnp->firstchp)
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*lnp->firstchp = newx;
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#ifdef DEBUG
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{
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int i;
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__CTRACE(__CTRACE_INPUT, "========before=======\n");
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for (i = 0; i < win->maxx; i++)
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__CTRACE(__CTRACE_INPUT,
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"wins_nwstr: (%d,%d)=(%x,%x,%d,%x,%p)\n",
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y, i, win->alines[y]->line[i].ch,
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win->alines[y]->line[i].attr,
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win->alines[y]->line[i].wcols,
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win->alines[y]->line[i].cflags,
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win->alines[y]->line[i].nsp);
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}
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#endif /* DEBUG */
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/* shift all complete characters */
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if (sx + width + pcw <= win->maxx) {
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__CTRACE(__CTRACE_INPUT, "wins_nwstr: shift all characters by %d\n", width);
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temp1 = &win->alines[y]->line[win->maxx - 1];
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temp2 = temp1 - width;
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pcw = (temp2 + 1)->wcols;
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if (pcw < 0) {
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__CTRACE(__CTRACE_INPUT,
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"wins_nwstr: clear from %d to EOL(%d)\n",
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win->maxx + pcw, win->maxx - 1);
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temp2 += pcw;
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while (temp1 > temp2 + width) {
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temp1->ch = win->bch;
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if (_cursesi_copy_nsp(win->bnsp, temp1) == ERR) {
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free(lstr);
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return ERR;
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}
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temp1->attr = win->battr;
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temp1->cflags |= CA_BACKGROUND;
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temp1->cflags &= ~CA_CONTINUATION;
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temp1->wcols = 1;
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__CTRACE(__CTRACE_INPUT,
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"wins_nwstr: empty cell(%p)\n", temp1);
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temp1--;
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}
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}
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while (temp2 >= start) {
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(void)memcpy(temp1, temp2, sizeof(__LDATA));
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temp1--, temp2--;
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}
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#ifdef DEBUG
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{
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int i;
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__CTRACE(__CTRACE_INPUT, "=====after shift====\n");
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for (i = 0; i < win->maxx; i++)
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__CTRACE(__CTRACE_INPUT,
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"wins_nwstr: (%d,%d)=(%x,%x,%x,%p)\n",
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y, i,
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win->alines[y]->line[i].ch,
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win->alines[y]->line[i].attr,
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win->alines[y]->line[i].cflags,
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win->alines[y]->line[i].nsp);
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__CTRACE(__CTRACE_INPUT, "=====lstr====\n");
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for (i = 0; i < len; i++)
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__CTRACE(__CTRACE_INPUT,
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"wins_nwstr: lstr[%d]= %x,\n",
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i, (unsigned) slstr[i]);
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}
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#endif /* DEBUG */
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}
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/* update string columns */
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x = lx;
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for (lstr = slstr, temp1 = start; len; len--, lstr++) {
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lnp = win->alines[y];
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cc.vals[0] = *lstr;
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cc.elements = 1;
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cc.attributes = win->wattr;
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_cursesi_addwchar(win, &lnp, &y, &x, &cc, 0);
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}
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#ifdef DEBUG
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{
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int i;
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__CTRACE(__CTRACE_INPUT, "lx = %d, x = %x\n", lx, x);
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__CTRACE(__CTRACE_INPUT, "========after=======\n");
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for (i = 0; i < win->maxx; i++)
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__CTRACE(__CTRACE_INPUT,
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"wins_nwstr: (%d,%d)=(%x,%x,%d,%x,%p)\n",
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y, i,
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win->alines[y]->line[i].ch,
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win->alines[y]->line[i].attr,
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win->alines[y]->line[i].wcols,
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win->alines[y]->line[i].cflags,
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win->alines[y]->line[i].nsp);
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}
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#endif /* DEBUG */
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__touchline(win, (int) y, lx, (int) win->maxx - 1);
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/*
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* Handle the newline here - we don't need to check
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* if we are allowed to scroll because this was checked
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* already.
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*/
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if (*scp == '\n') {
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tx = win->curx;
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ty = win->cury;
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win->curx = x;
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win->cury = y;
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wclrtoeol(win);
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win->curx = tx;
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win->cury = ty;
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if (y == win->scr_b)
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scroll(win);
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else
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y++;
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scp++;
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}
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newx = win->maxx - 1 + win->ch_off;
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if (newx > *lnp->lastchp)
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*lnp->lastchp = newx;
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}
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free(lstr);
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__sync(win);
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return OK;
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}
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