/****************************************************************************
- * Copyright (c) 1998-2014,2016 Free Software Foundation, Inc. *
+ * Copyright (c) 1998-2016,2017 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 *
/*
* Author: Thomas E. Dickey 1998
*
- * $Id: filter.c,v 1.24 2016/04/16 22:11:03 tom Exp $
+ * $Id: filter.c,v 1.32 2017/09/28 23:40:39 tom Exp $
*
* An example of the 'filter()' function in ncurses, this program prompts
* for commands and executes them (like a command shell). It illustrates
int skip, y, x;
int margin;
- sprintf(buffer, "%02d:%02d:%02d",
- my->tm_hour,
- my->tm_min,
- my->tm_sec);
+ _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) "%02d:%02d:%02d",
+ my->tm_hour,
+ my->tm_min,
+ my->tm_sec);
if (limit > 9) {
skip = 0;
if (polled) {
bool done = FALSE;
bool first = TRUE;
- int y, x;
+ int y = 0, x = 0;
int n;
int mark = 0;
int used = 0;
*/
#ifdef KEY_EVENT
if (code == KEY_EVENT)
- strcpy(buffer, "# event!");
+ _nc_STRCPY(buffer, "# event!", length);
#endif
#ifdef KEY_RESIZE
if (code == KEY_RESIZE) {
- strcpy(buffer, "# resize!");
+ _nc_STRCPY(buffer, "# resize!", length);
getch();
}
#endif
}
attroff(underline);
attroff(A_BOLD);
- printw("\n");
+ refresh();
return code;
}
+#ifdef NCURSES_VERSION
+/*
+ * Cancel xterm's alternate-screen mode (from dialog -TD)
+ */
+#define isprivate(s) ((s) != 0 && strstr(s, "\033[?") != 0)
+static void
+cancel_altscreen(void)
+{
+ if (isatty(fileno(stdout))
+ && key_mouse != 0 /* xterm and kindred */
+ && isprivate(enter_ca_mode)
+ && isprivate(exit_ca_mode)) {
+ /*
+ * initscr() or newterm() already wrote enter_ca_mode as a side effect
+ * of initializing the screen. It would be nice to not even do that,
+ * but we do not really have access to the correct copy of the
+ * terminfo description until those functions have been invoked.
+ */
+ (void) refresh();
+ (void) putp(exit_ca_mode);
+ (void) fflush(stdout);
+ /*
+ * Prevent ncurses from switching "back" to the normal screen when
+ * exiting from this program. That would move the cursor to the
+ * original location saved in xterm. Normally curses sets the cursor
+ * position to the first line after the display, but the alternate
+ * screen switching is done after that point.
+ *
+ * Cancelling the strings altogether also works around the buggy
+ * implementation of alternate-screen in rxvt, etc., which clear more
+ * of the display than they should.
+ */
+ enter_ca_mode = 0;
+ exit_ca_mode = 0;
+ }
+}
+#endif
+
static void
usage(void)
{
"Usage: filter [options]"
,""
,"Options:"
+#ifdef NCURSES_VERSION
+ ," -a suppress xterm alternate-screen by amending smcup/rmcup"
+#endif
," -c show current time on prompt line with \"Command\""
+#if HAVE_USE_DEFAULT_COLORS
+ ," -d invoke use_default_colors"
+#endif
," -i use initscr() rather than newterm()"
," -p poll for individual characters rather than using getnstr"
};
int ch;
char buffer[80];
int underline;
+#ifdef NCURSES_VERSION
+ bool a_option = FALSE;
+#endif
bool c_option = FALSE;
+#if HAVE_USE_DEFAULT_COLORS
+ bool d_option = FALSE;
+#endif
bool i_option = FALSE;
bool p_option = FALSE;
setlocale(LC_ALL, "");
- while ((ch = getopt(argc, argv, "cip")) != -1) {
+ while ((ch = getopt(argc, argv, "adcip")) != -1) {
switch (ch) {
+#ifdef NCURSES_VERSION
+ case 'a':
+ a_option = TRUE;
+ break;
+#endif
case 'c':
c_option = TRUE;
break;
+#if HAVE_USE_DEFAULT_COLORS
+ case 'd':
+ d_option = TRUE;
+ break;
+#endif
case 'i':
i_option = TRUE;
break;
if (i_option) {
initscr();
} else {
- (void) newterm((char *) 0, stdout, stdin);
+ if (newterm((char *) 0, stdout, stdin) == 0) {
+ fprintf(stderr, "cannot initialize terminal\n");
+ ExitProgram(EXIT_FAILURE);
+ }
+ }
+#ifdef NCURSES_VERSION
+ if (a_option) {
+ cancel_altscreen();
}
+#endif
cbreak();
keypad(stdscr, TRUE);
int background = COLOR_BLACK;
start_color();
#if HAVE_USE_DEFAULT_COLORS
- if (use_default_colors() != ERR)
+ if (d_option && (use_default_colors() != ERR))
background = -1;
#endif
init_pair(1, COLOR_CYAN, (short) background);
erase();
refresh();
}
- printw("done");
+ clear();
refresh();
endwin();
ExitProgram(EXIT_SUCCESS);