release/src/router/libncurses/test/clip_printw.c

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  28 /*
  29  * $Id: clip_printw.c,v 1.7 2010/11/13 20:48:48 tom Exp $
  30  *
  31  * demonstrate how to use printw without wrapping.
  32  */
  33
  34 #include <test.priv.h>
  35
  36 #ifdef HAVE_VW_PRINTW
  37
  38 #define SHOW(n) ((n) == ERR ? "ERR" : "OK")
  39 #define COLOR_DEFAULT (-1)
  40
  41 typedef struct {
  42     unsigned c;
  43     unsigned v;
  44     int status;
  45     int pair;
  46     attr_t attr;
  47     int count;
  48     int ch;
  49     const char *c_msg;
  50     const char *v_msg;
  51     int y_val;
  52     int x_val;
  53     int y_beg, x_beg;
  54     int y_max, x_max;
  55 } STATUS;
  56
  57 static int
  58 clip_wprintw(WINDOW *win, NCURSES_CONST char *fmt,...)
  59 {
  60     int y0, x0, y1, x1, width;
  61     WINDOW *sub;
  62     va_list ap;
  63     int rc;
  64
  65     /*
  66      * Allocate a single-line derived window extending from the current
  67      * cursor position to the end of the current line in the given window.
  68      * Disable scrolling in the derived window.
  69      */
  70     getyx(win, y0, x0);
  71     width = getmaxx(win) - x0;
  72     sub = derwin(win, 1, width, y0, x0);
  73     scrollok(sub, FALSE);
  74
  75     /*
  76      * Print the text.
  77      */
  78     va_start(ap, fmt);
  79     rc = vw_printw(sub, fmt, ap);
  80     va_end(ap);
  81
  82     getyx(sub, y1, x1);
  83     delwin(sub);
  84
  85     wmove(win, y1 + y0, x1 + x0);
  86
  87     return rc;
  88 }
  89
  90 static const char *
  91 color_params(unsigned state, int *pair)
  92 {
  93     /* *INDENT-OFF* */
  94     static struct {
  95         int pair;
  96         int fg, bg;
  97         const char *msg;
  98     } table[] = {
  99         { 0, COLOR_DEFAULT, COLOR_DEFAULT, "default" },
 100         { 1, COLOR_RED,     COLOR_BLACK,   "red/black" },
 101         { 2, COLOR_WHITE,   COLOR_BLUE,    "white/blue" },
 102     };
 103     /* *INDENT-ON* */
 104
 105     static bool first = TRUE;
 106     const char *result = 0;
 107
 108     if (has_colors()) {
 109         if (first) {
 110             unsigned n;
 111
 112             start_color();
 113             for (n = 0; n < SIZEOF(table); ++n) {
 114                 init_pair((short) table[n].pair,
 115                           (short) table[n].fg,
 116                           (short) table[n].bg);
 117             }
 118         }
 119         if (state < SIZEOF(table)) {
 120             *pair = table[state].pair;
 121             result = table[state].msg;
 122         }
 123     }
 124     return result;
 125 }
 126
 127 static const char *
 128 video_params(unsigned state, attr_t *attr)
 129 {
 130     /* *INDENT-OFF* */
 131     static struct {
 132         attr_t attr;
 133         const char *msg;
 134     } table[] = {
 135         { A_NORMAL,     "normal" },
 136         { A_BOLD,       "bold" },
 137         { A_REVERSE,    "reverse" },
 138         { A_UNDERLINE,  "underline" },
 139         { A_BLINK,      "blink" },
 140     };
 141     /* *INDENT-ON* */
 142
 143     const char *result = 0;
 144
 145     if (state < SIZEOF(table)) {
 146         *attr = table[state].attr;
 147         result = table[state].msg;
 148     }
 149     return result;
 150 }
 151
 152 /* fill the window with a test-pattern */
 153 static void
 154 fill_window(WINDOW *win)
 155 {
 156     int y, x;
 157     int y0 = -1, x0 = -1;
 158
 159     getyx(win, y, x);
 160     wmove(win, 0, 0);
 161     while (waddstr(win, "0123456789 abcdefghijklmnopqrstuvwxyz ") != ERR) {
 162         int y1, x1;
 163         getyx(win, y1, x1);
 164         if (y1 == y0 && x1 == x0)
 165             break;
 166         x0 = x1;
 167         y0 = y1;
 168     }
 169     wmove(win, y, x);
 170 }
 171
 172 static void
 173 show_status(WINDOW *win, STATUS * sp)
 174 {
 175     int y, x;
 176
 177     getyx(win, y, x);
 178     wmove(win, 0, 0);
 179     wprintw(win, "Count %d", sp->count);
 180     if (sp->v_msg != 0)
 181         wprintw(win, " Video %s", sp->v_msg);
 182     if (sp->c_msg != 0)
 183         wprintw(win, " Color %s", sp->c_msg);
 184     wprintw(win, " (%d)", sp->status);
 185     wclrtoeol(win);
 186     wmove(win, y, x);
 187 }
 188
 189 static void
 190 do_subwindow(WINDOW *win, STATUS * sp, void func(WINDOW *))
 191 {
 192     WINDOW *win1 = newwin(sp->y_max - 2, sp->x_max - 2,
 193                           sp->y_beg + 1, sp->x_beg + 1);
 194
 195     if (win1 != 0 && sp->y_max > 4 && sp->x_max > 4) {
 196         WINDOW *win2 = derwin(win1, sp->y_max - 4, sp->x_max - 4, 1, 1);
 197
 198         if (win2 != 0) {
 199             box(win1, 0, 0);
 200             wrefresh(win1);
 201             func(win2);
 202
 203             delwin(win2);
 204         } else {
 205             beep();
 206         }
 207         delwin(win1);
 208         touchwin(win);
 209     } else {
 210         beep();
 211     }
 212 }
 213
 214 static void
 215 init_status(WINDOW *win, STATUS * sp)
 216 {
 217     memset(sp, 0, sizeof(*sp));
 218     sp->c = 99;
 219     sp->v = 99;
 220     sp->ch = ' ';
 221
 222     keypad(win, TRUE);
 223     fill_window(win);
 224
 225     getbegyx(win, sp->y_beg, sp->x_beg);
 226     getmaxyx(win, sp->y_max, sp->x_max);
 227 }
 228
 229 static void
 230 show_help(WINDOW *win)
 231 {
 232     static const char *table[] =
 233     {
 234         "Basic commands:"
 235         ,"Use h/j/k/l or arrow keys to move the cursor."
 236         ,"Set the count parameter for clip_wprintw by entering digits 0-9."
 237         ,""
 238         ,"Other commands:"
 239         ,"space toggles through the set of video attributes and colors."
 240         ,"t     touches (forces repaint) of the current line."
 241         ,".     calls clip_wprintw at the current position with the given count."
 242         ,"=     resets count to zero."
 243         ,"?     shows this help-window"
 244         ,""
 245     };
 246
 247     int y_max, x_max;
 248     int row;
 249
 250     getmaxyx(win, y_max, x_max);
 251     for (row = 0; row < (int) SIZEOF(table) && row < y_max; ++row) {
 252         MvWPrintw(win, row, 0, "%.*s", x_max, table[row]);
 253     }
 254     while (wgetch(win) != 'q')
 255         beep();
 256 }
 257
 258 static void
 259 update_status(WINDOW *win, STATUS * sp)
 260 {
 261     switch (sp->ch) {
 262     case ' ':                   /* next test-iteration */
 263         if (has_colors()) {
 264             if ((sp->c_msg = color_params(++(sp->c), &(sp->pair))) == 0) {
 265                 sp->c_msg = color_params(sp->c = 0, &(sp->pair));
 266                 if ((sp->v_msg = video_params(++(sp->v), &(sp->attr))) == 0) {
 267                     sp->v_msg = video_params(sp->v = 0, &(sp->attr));
 268                 }
 269             }
 270         } else {
 271             if ((sp->v_msg = video_params(++(sp->v), &(sp->attr))) == 0) {
 272                 sp->v_msg = video_params(sp->v = 0, &(sp->attr));
 273             }
 274         }
 275         sp->count = 0;
 276         show_status(win, sp);
 277         break;
 278     case KEY_LEFT:
 279     case 'h':
 280         if (sp->x_val > 0)
 281             wmove(win, sp->y_val, --(sp->x_val));
 282         break;
 283     case KEY_DOWN:
 284     case 'j':
 285         if (sp->y_val < sp->y_max)
 286             wmove(win, ++(sp->y_val), sp->x_val);
 287         break;
 288     case KEY_UP:
 289     case 'k':
 290         if (sp->y_val > 0)
 291             wmove(win, --(sp->y_val), sp->x_val);
 292         break;
 293     case KEY_RIGHT:
 294     case 'l':
 295         if (sp->x_val < sp->x_max)
 296             wmove(win, sp->y_val, ++(sp->x_val));
 297         break;
 298     case 't':
 299         touchline(win, sp->y_val, 1);
 300         break;
 301     case '=':
 302         sp->count = 0;
 303         show_status(win, sp);
 304         break;
 305     case '?':
 306         do_subwindow(win, sp, show_help);
 307         break;
 308     default:
 309         if (isdigit(sp->ch)) {
 310             sp->count = (sp->count * 10) + (sp->ch - '0');
 311             show_status(win, sp);
 312         } else {
 313             beep();
 314         }
 315         break;
 316     }
 317 }
 318
 319 static void
 320 test_clipping(WINDOW *win)
 321 {
 322     STATUS st;
 323     char fmt[80];
 324     char *buffer;
 325     unsigned j, need;
 326
 327     init_status(win, &st);
 328
 329     do {
 330         switch (st.ch) {
 331         case '.':               /* change from current position */
 332             (void) wattrset(win, st.attr | (chtype) COLOR_PAIR(st.pair));
 333             if (st.count > 0) {
 334                 need = (unsigned) st.count + 1;
 335                 sprintf(fmt, "%%c%%%ds%%c", st.count);
 336             } else {
 337                 need = (unsigned) getmaxx(win) - 1;
 338                 strcpy(fmt, "%c%s%c");
 339             }
 340             if ((buffer = typeMalloc(char, need)) != 0) {
 341                 for (j = 0; j < need; ++j) {
 342                     buffer[j] = (char) ('A' + (j % 26));
 343                 }
 344                 buffer[need - 1] = '\0';
 345                 st.status = clip_wprintw(win, fmt, '[', buffer, ']');
 346             }
 347             break;
 348         case 'w':
 349             do_subwindow(win, &st, test_clipping);
 350             break;
 351         case 'q':
 352             return;
 353         default:
 354             update_status(win, &st);
 355             break;
 356         }
 357     } while ((st.ch = wgetch(win)) != ERR);
 358 }
 359
 360 int
 361 main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED)
 362 {
 363     initscr();
 364     cbreak();
 365     noecho();
 366
 367     test_clipping(stdscr);
 368     endwin();
 369
 370     ExitProgram(EXIT_SUCCESS);
 371 }
 372
 373 #else
 374 int
 375 main(void)
 376 {
 377     printf("This program requires the curses vw_printw function\n");
 378     ExitProgram(EXIT_FAILURE);
 379 }
 380 #endif