/* $NetBSD: ins_wch.c,v 1.14.2.1 2020/07/07 12:43:51 martin 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 . * * * 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 #ifndef lint __RCSID("$NetBSD: ins_wch.c,v 1.14.2.1 2020/07/07 12:43:51 martin Exp $"); #endif /* not lint */ #include #include #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) { return wins_wch(stdscr, wch); } /* * mvins_wch -- * Do an insert-char on the line at (y, x). */ int mvins_wch(int y, int x, const cchar_t *wch) { return mvwins_wch(stdscr, y, x, wch); } /* * 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) { if (wmove(win, y, x) == ERR) return ERR; return wins_wch(win, wch); } /* * wins_wch -- * Do an insert-char on the line, leaving (cury, curx) unchanged. */ int wins_wch(WINDOW *win, const cchar_t *wch) { __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 < 0) cw = 1; 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->alines[0]->line[x].ch, win->alines[0]->line[x].attr, win->alines[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, TABSIZE - (x % TABSIZE))) == ERR) return ERR; return OK; } /* locate current cell */ x = win->curx; y = win->cury; lnp = win->alines[y]; start = &win->alines[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->alines[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 = 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->alines[0]->line[x].ch, win->alines[0]->line[x].attr, win->alines[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); __sync(win); return OK; }