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Diffstat (limited to 'ncurses-5.9/test/filter.c')
| -rw-r--r-- | ncurses-5.9/test/filter.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/ncurses-5.9/test/filter.c b/ncurses-5.9/test/filter.c new file mode 100644 index 0000000..153d7d3 --- /dev/null +++ b/ncurses-5.9/test/filter.c @@ -0,0 +1,164 @@ +/**************************************************************************** + * Copyright (c) 1998-2008,2010 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 <dickey@clark.net> 1998 + * + * $Id$ + */ +#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 = 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); + 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 */ |