lib/libcurses/add_wchstr.c

   1 /*   $NetBSD: add_wchstr.c,v 1.2 2007/05/28 15:01:53 blymn Exp $ */
   2
   3 /*
   4  * Copyright (c) 2005 The NetBSD Foundation Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from code donated to the NetBSD Foundation
   8  * by Ruibiao Qiu <ruibiao@arl.wustl.edu,ruibiao@gmail.com>.
   9  *
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the NetBSD Foundation nor the names of its
  20  *    contributors may be used to endorse or promote products derived
  21  *    from this software without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
  24  * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  25  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  26  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #include <sys/cdefs.h>
  38 #ifndef lint
  39 __RCSID("$NetBSD: add_wchstr.c,v 1.2 2007/05/28 15:01:53 blymn Exp $");
  40 #endif                          /* not lint */
  41
  42 #include <stdlib.h>
  43
  44 #include "curses.h"
  45 #include "curses_private.h"
  46
  47 /*
  48  * add_wchstr --
  49  *  Add a wide string to stdscr starting at (_cury, _curx).
  50  */
  51 int
  52 add_wchstr(const cchar_t *wchstr)
  53 {
  54 #ifndef HAVE_WCHAR
  55         return ERR;
  56 #else
  57         return wadd_wchnstr(stdscr, wchstr, -1);
  58 #endif
  59 }
  60
  61
  62 /*
  63  * wadd_wchstr --
  64  *      Add a string to the given window starting at (_cury, _curx).
  65  */
  66 int
  67 wadd_wchstr(WINDOW *win, const cchar_t *wchstr)
  68 {
  69 #ifndef HAVE_WCHAR
  70         return ERR;
  71 #else
  72         return wadd_wchnstr(win, wchstr, -1);
  73 #endif
  74 }
  75
  76
  77 /*
  78  * add_wchnstr --
  79  *      Add a string (at most n characters) to stdscr starting
  80  *      at (_cury, _curx).  If n is negative, add the entire string.
  81  */
  82 int
  83 add_wchnstr(const cchar_t *wchstr, int n)
  84 {
  85 #ifndef HAVE_WCHAR
  86         return ERR;
  87 #else
  88         return wadd_wchnstr(stdscr, wchstr, n);
  89 #endif
  90 }
  91
  92
  93 /*
  94  * mvadd_wchstr --
  95  *      Add a string to stdscr starting at (y, x)
  96  */
  97 int
  98 mvadd_wchstr(int y, int x, const cchar_t *wchstr)
  99 {
 100 #ifndef HAVE_WCHAR
 101         return ERR;
 102 #else
 103         return mvwadd_wchnstr(stdscr, y, x, wchstr, -1);
 104 #endif
 105 }
 106
 107
 108 /*
 109  * mvwadd_wchstr --
 110  *      Add a string to the given window starting at (y, x)
 111  */
 112 int
 113 mvwadd_wchstr(WINDOW *win, int y, int x, const cchar_t *wchstr)
 114 {
 115 #ifndef HAVE_WCHAR
 116         return ERR;
 117 #else
 118         return mvwadd_wchnstr(win, y, x, wchstr, -1);
 119 #endif
 120 }
 121
 122
 123 /*
 124  * mvadd_wchnstr --
 125  *      Add a string of at most n characters to stdscr
 126  *      starting at (y, x).
 127  */
 128 int
 129 mvadd_wchnstr(int y, int x, const cchar_t *wchstr, int n)
 130 {
 131 #ifndef HAVE_WCHAR
 132         return ERR;
 133 #else
 134         return mvwadd_wchnstr(stdscr, y, x, wchstr, n);
 135 #endif
 136 }
 137
 138
 139 /*
 140  * mvwadd_wchnstr --
 141  *      Add a string of at most n characters to the given window
 142  *      starting at (y, x).
 143  */
 144 int
 145 mvwadd_wchnstr(WINDOW *win, int y, int x, const cchar_t *wchstr, int n)
 146 {
 147 #ifndef HAVE_WCHAR
 148         return ERR;
 149 #else
 150         if (wmove(win, y, x) == ERR)
 151                 return ERR;
 152
 153         return wadd_wchnstr(win, wchstr, n);
 154 #endif
 155 }
 156
 157
 158 /*
 159  * wadd_wchnstr --
 160  *      Add a string (at most n wide characters) to the given window
 161  *      starting at (_cury, _curx).  If n is -1, add the entire string.
 162  */
 163 int
 164 wadd_wchnstr(WINDOW *win, const cchar_t *wchstr, int n)
 165 {
 166 #ifndef HAVE_WCHAR
 167         return ERR;
 168 #else
 169         const cchar_t *chp;
 170         wchar_t wc;
 171         int cw, x, y, sx, ex, newx, i, cnt;
 172         __LDATA *lp, *tp;
 173         nschar_t *np, *tnp;
 174         __LINE *lnp;
 175
 176 #ifdef DEBUG
 177         __CTRACE(__CTRACE_INPUT,
 178             "wadd_wchnstr: win = %p, wchstr = %p, n = %d\n", win, wchstr, n);
 179 #endif
 180
 181         if (!wchstr)
 182                 return OK;
 183
 184         /* compute length of the cchar string */
 185         if (n < -1)
 186                 return ERR;
 187         if (n >= 0)
 188                 for (chp = wchstr, cnt = 0; n && chp->vals[0];
 189                         n--, chp++, ++cnt);
 190         else
 191                 for (chp = wchstr, cnt = 0; chp->vals[0]; chp++, ++cnt);
 192 #ifdef DEBUG
 193         __CTRACE(__CTRACE_INPUT, "wadd_wchnstr: len=%d\n", cnt);
 194 #endif /* DEBUG */
 195         chp = wchstr;
 196         x = win->curx;
 197         y = win->cury;
 198         lp = &win->alines[y]->line[x];
 199         lnp = win->alines[y];
 200
 201         cw = WCOL(*lp);
 202         if (cw >= 0) {
 203                 sx = x;
 204         } else {
 205                 if (wcwidth(chp->vals[0])) {
 206                         /* clear the partial character before cursor */
 207                         for (tp = lp + cw; tp < lp; tp++) {
 208                                 tp->ch = (wchar_t) btowc((int) win->bch);
 209                                 if (_cursesi_copy_nsp(win->bnsp, tp) == ERR)
 210                                         return ERR;
 211                                 tp->attr = win->battr;
 212                                 SET_WCOL(*tp, 1);
 213                                 np = tp->nsp;
 214                         }
 215                 } else {
 216                         /* move to the start of current char */
 217                         lp += cw;
 218                         x += cw;
 219                 }
 220                 sx = x + cw;
 221         }
 222         lnp->flags |= __ISDIRTY;
 223         newx = sx + win->ch_off;
 224         if (newx < *lnp->firstchp)
 225                 *lnp->firstchp = newx;
 226
 227         /* add characters in the string */
 228         ex = x;
 229         while (cnt) {
 230                 x = ex;
 231                 wc = chp->vals[0];
 232 #ifdef DEBUG
 233                 __CTRACE(__CTRACE_INPUT, "wadd_wchnstr: adding %x", wc);
 234 #endif /* DEBUG */
 235                 cw = wcwidth(wc);
 236                 if (cw) {
 237                         /* spacing character */
 238 #ifdef DEBUG
 239                         __CTRACE(__CTRACE_INPUT,
 240                             " as a spacing char(width=%d)\n", cw);
 241 #endif /* DEBUG */
 242                         if (cw > win->maxx - ex) {
 243                                 /* clear to EOL */
 244                                 while (ex < win->maxx) {
 245                                         lp->ch = (wchar_t)
 246                                                 btowc((int) win->bch);
 247                                         if (_cursesi_copy_nsp(win->bnsp, lp)
 248                                             == ERR)
 249                                                 return ERR;
 250                                         lp->attr = win->battr;
 251                                         SET_WCOL(*lp, 1);
 252                                         lp++, ex++;
 253                                 }
 254                                 ex = win->maxx - 1;
 255                                 break;
 256                         }
 257                         /* this could combine with the insertion of
 258                          * non-spacing char */
 259                         np = lp->nsp;
 260                         if (np) {
 261                                 while (np) {
 262                                         tnp = np->next;
 263                                         free(np);
 264                                         np = tnp;
 265                                 }
 266                                 lp->nsp = NULL;
 267                         }
 268                         lp->ch = chp->vals[0];
 269                         lp->attr = chp->attributes & WA_ATTRIBUTES;
 270                         SET_WCOL(*lp, cw);
 271                         if (chp->elements > 1) {
 272                                 for (i = 1; i < chp->elements; i++) {
 273                                         np = (nschar_t *)
 274                                                 malloc(sizeof(nschar_t));
 275                                         if (!np)
 276                                                 return ERR;
 277                                         np->ch = chp->vals[i];
 278                                         np->next = lp->nsp;
 279                                         lp->nsp = np;
 280                                 }
 281                         }
 282                         lp++, ex++;
 283 #ifdef DEBUG
 284                         __CTRACE(__CTRACE_INPUT,
 285                                 "wadd_wchnstr: ex = %d, x = %d, cw = %d\n",
 286                                  ex, x, cw);
 287 #endif /* DEBUG */
 288                         while (ex - x <= cw - 1) {
 289                                 np = lp->nsp;
 290                                 if (np) {
 291                                         while (np) {
 292                                                 tnp = np->next;
 293                                                 free(np);
 294                                                 np = tnp;
 295                                         }
 296                                         lp->nsp = NULL;
 297                                 }
 298                                 lp->ch = chp->vals[0];
 299                                 lp->attr = chp->attributes & WA_ATTRIBUTES;
 300                                 SET_WCOL(*lp, x - ex);
 301                                 lp++, ex++;
 302                         }
 303                 } else {
 304                         /* non-spacing character */
 305 #ifdef DEBUG
 306                         __CTRACE(__CTRACE_INPUT,
 307                                 "wadd_wchnstr: as non-spacing char");
 308 #endif /* DEBUG */
 309                         for (i = 0; i < chp->elements; i++) {
 310                                 np = (nschar_t *)malloc(sizeof(nschar_t));
 311                                 if (!np)
 312                                         return ERR;
 313                                 np->ch = chp->vals[i];
 314                                 np->next = lp->nsp;
 315                                 lp->nsp = np;
 316                         }
 317                 }
 318                 cnt--, chp++;
 319         }
 320 #ifdef DEBUG
 321         for (i = sx; i < ex; i++) {
 322                 __CTRACE(__CTRACE_INPUT, "wadd_wchnstr: (%d,%d)=(%x,%x,%p)\n",
 323                     win->cury, i, win->alines[win->cury]->line[i].ch,
 324                     win->alines[win->cury]->line[i].attr,
 325                     win->alines[win->cury]->line[i].nsp);
 326         }
 327 #endif /* DEBUG */
 328         lnp->flags |= __ISDIRTY;
 329         newx = ex + win->ch_off;
 330         if (newx > *lnp->lastchp)
 331                 *lnp->lastchp = newx;
 332         __touchline(win, y, sx, ex);
 333
 334         return OK;
 335 #endif /* HAVE_WCHAR */
 336 }