Edit File: foldkeys.c
/**************************************************************************** * Copyright (c) 2006 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * * "Software"), to deal in the Software without restriction, including * * without limitation the rights to use, copy, modify, merge, publish, * * distribute, distribute with modifications, sublicense, and/or sell * * copies of the Software, and to permit persons to whom the Software is * * furnished to do so, subject to the following conditions: * * * * The above copyright notice and this permission notice shall be included * * in all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * * * Except as contained in this notice, the name(s) of the above copyright * * holders shall not be used in advertising or otherwise to promote the * * sale, use or other dealings in this Software without prior written * * authorization. * ****************************************************************************/ /* * Author: Thomas E. Dickey, 2006 * * $Id: foldkeys.c,v 1.3 2006/12/09 16:54:07 tom Exp $ * * Demonstrate a method for altering key definitions at runtime. * * This program reads the key definitions, merging those which have xterm-style * modifiers into their equivalents which have no modifiers. It does this * merging only for the keys which are defined in the terminal description. */ #include <test.priv.h> #if defined(NCURSES_VERSION) && NCURSES_EXT_FUNCS #if TIME_WITH_SYS_TIME # include <sys/time.h> # include <time.h> #else # if HAVE_SYS_TIME_H # include <sys/time.h> # else # include <time.h> # endif #endif #define MY_LOGFILE "demo_foldkeys.log" #define MY_KEYS (KEY_MAX + 1) /* * Log the most recently-written line to our logfile */ static void log_last_line(WINDOW *win) { FILE *fp; int y, x, n; char temp[256]; if ((fp = fopen(MY_LOGFILE, "a")) != 0) { int need = sizeof(temp) - 1; if (need > COLS) need = COLS; getyx(win, y, x); wmove(win, y - 1, 0); n = winnstr(win, temp, need); while (n-- > 0) { if (isspace(UChar(temp[n]))) temp[n] = '\0'; else break; } wmove(win, y, x); fprintf(fp, "%s\n", temp); fclose(fp); } } /* * ncurses has no API for telling what the actual last key-code is. That is * a secret because the codes past KEY_MAX are computed at run-time and may * differ depending on the previous calls to newterm(), etc. It is unlikely * that one could have more than a thousand key definitions... */ #define MAX_KEYS 2000 typedef struct { const char *name; const char *value; int code; int state; } KeyInfo; static void demo_foldkeys(void) { KeyInfo info[MAX_KEYS]; int info_len = 0; int merged = 0; int code; int j, k; /* * Tell ncurses that we want to use function keys. That will make it add * any user-defined keys that appear in the terminfo. */ keypad(stdscr, TRUE); /* * List the predefined keys using the strnames[] array. */ for (code = 0; code < STRCOUNT; ++code) { NCURSES_CONST char *name = strnames[code]; NCURSES_CONST char *value = tigetstr(name); if (value != 0 && value != (NCURSES_CONST char *) -1) { info[info_len].name = strnames[code]; info[info_len].code = key_defined(value); info[info_len].value = value; info[info_len].state = 0; if (info[info_len].code > 0) ++info_len; } } /* * We can get the names for user-defined keys from keyname(). It returns * a name like KEY_foo for the predefined keys, which tigetstr() does not * understand. */ for (code = KEY_MAX; code < MAX_KEYS; ++code) { NCURSES_CONST char *name = keyname(code); if (name != 0) { info[info_len].name = name; info[info_len].code = code; info[info_len].value = tigetstr(name); info[info_len].state = 0; ++info_len; } } printw("Initially %d key definitions\n", info_len); /* * Look for keys that have xterm-style modifiers. */ for (j = 0; j < info_len; ++j) { int first, second; char final[2]; char *value; if (info[j].state == 0 && sscanf(info[j].value, "\033[%d;%d%c", &first, &second, final) == 3 && *final != ';' && (value = strdup(info[j].value)) != 0) { sprintf(value, "\033[%d%c", first, *final); for (k = 0; k < info_len; ++k) { if (info[k].state == 0 && !strcmp(info[k].value, value)) { info[j].state = 1; break; } } if (info[j].state == 0) { sprintf(value, "\033O%c", *final); for (k = 0; k < info_len; ++k) { if (info[k].state == 0 && !strcmp(info[k].value, value)) { info[j].state = 1; break; } } } if (info[j].state == 1) { if ((define_key(info[j].value, info[k].code)) != ERR) { printw("map %s to %s\n", info[j].value, info[k].value); keyok(info[j].code, FALSE); ++merged; } else { printw("? cannot define_key %d:%s\n", j, info[j].value); } } else { printw("? cannot merge %d:%s\n", j, info[j].value); } free(value); } } printw("Merged to %d key definitions\n", info_len - merged); } int main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED) { int ch; #if HAVE_GETTIMEOFDAY int secs, msecs; struct timeval current, previous; #endif unlink(MY_LOGFILE); newterm(0, stdout, stdin); (void) cbreak(); /* take input chars one at a time, no wait for \n */ (void) noecho(); /* don't echo input */ scrollok(stdscr, TRUE); keypad(stdscr, TRUE); move(0, 0); demo_foldkeys(); #if HAVE_GETTIMEOFDAY gettimeofday(&previous, 0); #endif while ((ch = getch()) != ERR) { bool escaped = (ch >= MY_KEYS); const char *name = keyname(escaped ? (ch - MY_KEYS) : ch); #if HAVE_GETTIMEOFDAY gettimeofday(¤t, 0); secs = current.tv_sec - previous.tv_sec; msecs = (current.tv_usec - previous.tv_usec) / 1000; if (msecs < 0) { msecs += 1000; --secs; } if (msecs >= 1000) { secs += msecs / 1000; msecs %= 1000; } printw("%6d.%03d ", secs, msecs); previous = current; #endif printw("Keycode %d, name %s%s\n", ch, escaped ? "ESC-" : "", name != 0 ? name : "<null>"); log_last_line(stdscr); clrtoeol(); if (ch == 'q') break; } endwin(); ExitProgram(EXIT_SUCCESS); } #else int main(void) { printf("This program requires the ncurses library\n"); ExitProgram(EXIT_FAILURE); } #endif
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