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

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  28 /*
  29  * $Id: demo_defkey.c,v 1.20 2010/11/14 00:59:35 tom Exp $
  30  *
  31  * Demonstrate the define_key() function.
  32  * Thomas Dickey - 2002/11/23
  33  */
  34
  35 #include <test.priv.h>
  36
  37 #if defined(NCURSES_VERSION) && NCURSES_EXT_FUNCS
  38
  39 #define MY_LOGFILE "demo_defkey.log"
  40
  41 /*
  42  * Log the most recently-written line to our logfile
  43  */
  44 static void
  45 log_last_line(WINDOW *win)
  46 {
  47     FILE *fp;
  48     int y, x, n;
  49     char temp[256];
  50
  51     if ((fp = fopen(MY_LOGFILE, "a")) != 0) {
  52         int need = sizeof(temp) - 1;
  53         if (need > COLS)
  54             need = COLS;
  55         getyx(win, y, x);
  56         wmove(win, y - 1, 0);
  57         n = winnstr(win, temp, need);
  58         while (n-- > 0) {
  59             if (isspace(UChar(temp[n])))
  60                 temp[n] = '\0';
  61             else
  62                 break;
  63         }
  64         wmove(win, y, x);
  65         fprintf(fp, "%s\n", temp);
  66         fclose(fp);
  67     }
  68 }
  69
  70 /*
  71  * Convert a character to visible form.
  72  */
  73 static char *
  74 visichar(int ch)
  75 {
  76     static char temp[10];
  77
  78     ch = UChar(ch);
  79     assert(ch >= 0 && ch < 256);
  80     if (ch == '\\') {
  81         strcpy(temp, "\\\\");
  82     } else if (ch == '\033') {
  83         strcpy(temp, "\\E");
  84     } else if (ch < ' ') {
  85         sprintf(temp, "\\%03o", ch);
  86     } else if (ch >= 127) {
  87         sprintf(temp, "\\%03o", ch);
  88     } else {
  89         sprintf(temp, "%c", ch);
  90     }
  91     return temp;
  92 }
  93
  94 /*
  95  * Convert a string to visible form.
  96  */
  97 static char *
  98 visible(const char *string)
  99 {
 100     char *result = 0;
 101     size_t need = 1;
 102     int pass;
 103     int n;
 104
 105     if (string != 0 && *string != '\0') {
 106         for (pass = 0; pass < 2; ++pass) {
 107             for (n = 0; string[n] != '\0'; ++n) {
 108                 char temp[80];
 109                 strcpy(temp, visichar(string[n]));
 110                 if (pass)
 111                     strcat(result, temp);
 112                 else
 113                     need += strlen(temp);
 114             }
 115             if (!pass)
 116                 result = typeCalloc(char, need);
 117         }
 118     } else {
 119         result = typeCalloc(char, 1);
 120     }
 121     return result;
 122 }
 123
 124 static void
 125 really_define_key(WINDOW *win, const char *new_string, int code)
 126 {
 127     int rc;
 128     const char *code_name = keyname(code);
 129     char *old_string;
 130     char *vis_string = 0;
 131     char temp[80];
 132
 133     if (code_name == 0) {
 134         sprintf(temp, "Keycode %d", code);
 135         code_name = temp;
 136     }
 137
 138     if ((old_string = keybound(code, 0)) != 0) {
 139         wprintw(win, "%s is %s\n",
 140                 code_name,
 141                 vis_string = visible(old_string));
 142     } else {
 143         wprintw(win, "%s is not bound\n",
 144                 code_name);
 145     }
 146     log_last_line(win);
 147
 148     if (vis_string != 0) {
 149         free(vis_string);
 150         vis_string = 0;
 151     }
 152
 153     vis_string = visible(new_string);
 154     if ((rc = key_defined(new_string)) > 0) {
 155         wprintw(win, "%s was bound to %s\n", vis_string, keyname(rc));
 156         log_last_line(win);
 157     } else if (new_string != 0 && rc < 0) {
 158         wprintw(win, "%s conflicts with longer strings\n", vis_string);
 159         log_last_line(win);
 160     }
 161     rc = define_key(new_string, code);
 162     if (rc == ERR) {
 163         wprintw(win, "%s unchanged\n", code_name);
 164         log_last_line(win);
 165     } else if (new_string != 0) {
 166         wprintw(win, "%s is now bound to %s\n",
 167                 vis_string,
 168                 code_name);
 169         log_last_line(win);
 170     } else if (old_string != 0) {
 171         wprintw(win, "%s deleted\n", code_name);
 172         log_last_line(win);
 173     }
 174     if (vis_string != 0)
 175         free(vis_string);
 176     if (old_string != 0)
 177         free(old_string);
 178 }
 179
 180 static void
 181 duplicate(WINDOW *win, NCURSES_CONST char *name, int code)
 182 {
 183     char *value = tigetstr(name);
 184
 185     if (value != 0) {
 186         const char *prefix = 0;
 187         char temp[BUFSIZ];
 188
 189         if (!strncmp(value, "\033[", 2)) {
 190             prefix = "\033O";
 191         } else if (!strncmp(value, "\033O", 2)) {
 192             prefix = "\033[";
 193         }
 194         if (prefix != 0) {
 195             sprintf(temp, "%s%s", prefix, value + 2);
 196             really_define_key(win, temp, code);
 197         }
 198     }
 199 }
 200
 201 static void
 202 redefine(WINDOW *win, char *string, int code)
 203 {
 204     really_define_key(win, string, code);
 205 }
 206
 207 static void
 208 remove_definition(WINDOW *win, int code)
 209 {
 210     really_define_key(win, 0, code);
 211 }
 212
 213 int
 214 main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED)
 215 {
 216     char *fkeys[12];
 217     int n;
 218     int ch;
 219     WINDOW *win;
 220
 221     unlink(MY_LOGFILE);
 222
 223     initscr();
 224     (void) cbreak();            /* take input chars one at a time, no wait for \n */
 225     (void) noecho();            /* don't echo input */
 226
 227     printw("This demo is best on xterm: it reverses the definitions for f1-f12,\n");
 228     printw("adds duplicate definitions for cursor application and normal modes,\n");
 229     printw("and removes any definitions for the mini keypad.  Type any of those:\n");
 230     refresh();
 231
 232     win = newwin(LINES - 3, COLS, 3, 0);
 233     scrollok(win, TRUE);
 234     keypad(win, TRUE);
 235     wmove(win, 0, 0);
 236
 237     /* we do the define_key() calls after keypad(), since the first call to
 238      * keypad() initializes the corresponding data.
 239      */
 240     for (n = 0; n < 12; ++n) {
 241         char name[10];
 242         sprintf(name, "kf%d", n + 1);
 243         fkeys[n] = tigetstr(name);
 244     }
 245     for (n = 0; n < 12; ++n) {
 246         redefine(win, fkeys[11 - n], KEY_F(n + 1));
 247     }
 248
 249     duplicate(win, "kcub1", KEY_LEFT);
 250     duplicate(win, "kcuu1", KEY_UP);
 251     duplicate(win, "kcud1", KEY_DOWN);
 252     duplicate(win, "kcuf1", KEY_RIGHT);
 253
 254     remove_definition(win, KEY_A1);
 255     remove_definition(win, KEY_A3);
 256     remove_definition(win, KEY_B2);
 257     remove_definition(win, KEY_C1);
 258     remove_definition(win, KEY_C3);
 259
 260     really_define_key(win, "\033O", 1023);
 261
 262     while ((ch = wgetch(win)) != ERR) {
 263         const char *name = keyname(ch);
 264         wprintw(win, "Keycode %d, name %s\n",
 265                 ch,
 266                 name != 0 ? name : "<null>");
 267         log_last_line(win);
 268         wclrtoeol(win);
 269         if (ch == 'q')
 270             break;
 271     }
 272     endwin();
 273     ExitProgram(EXIT_FAILURE);
 274 }
 275 #else
 276 int
 277 main(void)
 278 {
 279     printf("This program requires the ncurses library\n");
 280     ExitProgram(EXIT_FAILURE);
 281 }
 282 #endif