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PATH: usr / share / doc / ncurses-devel-5.9 / test

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/*
 * Author:  Thomas E. Dickey <dickey@clark.net> 1998
 *
 * $Id: filter.c,v 1.15 2012/06/09 20:30:32 tom Exp $
 */
#include <test.priv.h>

#if HAVE_FILTER

/*
 * An example of the 'filter()' function in ncurses, this program prompts
 * for commands and executes them (like a command shell).  It illustrates
 * how ncurses can be used to implement programs that are not full-screen.
 *
 * Ncurses differs slightly from SVr4 curses.  The latter does not flush its
 * state when exiting program mode, so the attributes on the command lines of
 * this program 'bleed' onto the executed commands.  Rather than use the
 * reset_shell_mode() and reset_prog_mode() functions, we could invoke endwin()
 * and refresh(), but that does not work any better.
 */

static int
new_command(char *buffer, int length, attr_t underline)
{
    int code;

attron(A_BOLD);
    printw("Command: ");
    attron(underline);
    code = getnstr(buffer, length);
    /*
     * If this returns anything except ERR/OK, it would be one of ncurses's
     * extensions.  Fill the buffer with something harmless that the shell
     * will execute as a comment.
     */
#ifdef KEY_EVENT
    if (code == KEY_EVENT)
	strcpy(buffer, "# event!");
#endif
#ifdef KEY_RESIZE
    if (code == KEY_RESIZE) {
	strcpy(buffer, "# resize!");
	getch();
    }
#endif
    attroff(underline);
    attroff(A_BOLD);
    printw("\n");

return code;
}

static void
usage(void)
{
    static const char *msg[] =
    {
	"Usage: filter [options]"
	,""
	,"Options:"
	,"  -i   use initscr() rather than newterm()"
    };
    unsigned n;
    for (n = 0; n < SIZEOF(msg); n++)
	fprintf(stderr, "%s\n", msg[n]);
    ExitProgram(EXIT_FAILURE);
}

int
main(int argc, char *argv[])
{
    int ch;
    char buffer[80];
    attr_t underline;
    bool i_option = FALSE;

setlocale(LC_ALL, "");

while ((ch = getopt(argc, argv, "i")) != -1) {
	switch (ch) {
	case 'i':
	    i_option = TRUE;
	    break;
	default:
	    usage();
	}
    }

printf("starting filter program using %s...\n",
	   i_option ? "initscr" : "newterm");
    filter();
    if (i_option) {
	initscr();
    } else {
	(void) newterm((char *) 0, stdout, stdin);
    }
    cbreak();
    keypad(stdscr, TRUE);

if (has_colors()) {
	int background = COLOR_BLACK;
	start_color();
#if HAVE_USE_DEFAULT_COLORS
	if (use_default_colors() != ERR)
	    background = -1;
#endif
	init_pair(1, COLOR_CYAN, (short) background);
	underline = (attr_t) COLOR_PAIR(1);
    } else {
	underline = A_UNDERLINE;
    }

while (new_command(buffer, sizeof(buffer) - 1, underline) != ERR
	   && strlen(buffer) != 0) {
	reset_shell_mode();
	printf("\n");
	fflush(stdout);
	IGNORE_RC(system(buffer));
	reset_prog_mode();
	touchwin(stdscr);
	erase();
	refresh();
    }
    printw("done");
    refresh();
    endwin();
    ExitProgram(EXIT_SUCCESS);
}
#else
int
main(void)
{
    printf("This program requires the filter function\n");
    ExitProgram(EXIT_FAILURE);
}
#endif /* HAVE_FILTER */

[-] color_set.c [edit]
[-] hashtest.c [edit]
[-] demo_termcap.c [edit]
[-] filter.c [edit]
[-] widechars-utf8.txt [edit]
[-] keynames.c [edit]
[-] firstlast.c [edit]
[-] chgat.c [edit]
[-] test_arrays.c [edit]
[-] view.c [edit]
[+] package
[-] gdc.c [edit]
[-] dots_mvcur.c [edit]
[-] movewindow.c [edit]
[+] ..
[-] ncurses_tst.hin [edit]
[-] firework.c [edit]
[-] ditto.c [edit]
[-] inch_wide.c [edit]
[-] README [edit]
[-] edit_field.h [edit]
[-] test_getstr.c [edit]
[-] hanoi.c [edit]
[-] railroad.c [edit]
[-] test_addwstr.c [edit]
[-] linux-color.dat [edit]
[-] test_add_wchstr.c [edit]
[-] bulgarian-utf8.txt [edit]
[-] linedata.h [edit]
[-] testcurs.c [edit]
[-] savescreen.sh [edit]
[-] xmas.c [edit]
[-] widechars.h [edit]
[-] inserts.c [edit]
[-] modules [edit]
[-] xterm-16color.dat [edit]
[-] newdemo.c [edit]
[-] echochar.c [edit]
[-] savescreen.c [edit]
[-] knight.c [edit]
[-] bs.c [edit]
[-] testscanw.c [edit]
[-] test_addchstr.c [edit]
[-] foldkeys.c [edit]
[-] mk-test.awk [edit]
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[-] install-sh [edit]
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[-] test_instr.c [edit]
[-] configure.in [edit]
[-] test_opaque.c [edit]
[-] bs.6 [edit]
[-] demo_menus.c [edit]
[-] test_get_wstr.c [edit]
[-] insdelln.c [edit]
[-] xterm-88color.dat [edit]
[-] testaddch.c [edit]
[-] demo_panels.c [edit]
[-] test.priv.h [edit]
[-] tracemunch [edit]
[-] ncurses.c [edit]
[-] demo_terminfo.c [edit]
[-] test_vidputs.c [edit]
[-] test_inwstr.c [edit]
[-] rain.c [edit]
[-] cardfile.c [edit]
[-] background.c [edit]
[-] test_vid_puts.c [edit]
[-] demo_keyok.c [edit]
[-] inchs.c [edit]
[-] Makefile.in [edit]
[-] demo_altkeys.c [edit]
[-] demo_defkey.c [edit]
[-] xterm-256color.dat [edit]
[-] blue.c [edit]
[-] demo_forms.c [edit]
[-] listused.sh [edit]
[-] lrtest.c [edit]
[-] dots.c [edit]
[-] tclock.c [edit]
[-] cardfile.dat [edit]
[-] make-tar.sh [edit]
[-] redraw.c [edit]
[-] key_names.c [edit]
[-] ins_wide.c [edit]
[-] edit_field.c [edit]
[-] color_name.h [edit]
[-] worm.c [edit]
[-] test_addstr.c [edit]
[-] programs [edit]
[-] gdc.6 [edit]