ncurses 6.1 - patch 20190216

[ncurses.git] / test / demo_tabs.c

diff --git a/test/demo_tabs.c b/test/demo_tabs.c
new file mode 100644 (file)
index 0000000..68023a3
--- /dev/null
+++ b/test/demo_tabs.c
@@ -0,0 +1,116 @@
+/****************************************************************************
+ * Copyright (c) 2019 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
+ *
+ * $Id: demo_tabs.c,v 1.2 2019/02/17 01:01:11 tom Exp $
+ *
+ * A simple demo of tabs in curses.
+ */
+#include "test.priv.h"
+
+static void
+usage(void)
+{
+    static const char *msg[] =
+    {
+       "Usage: demo_tabs [options]",
+       "",
+       "Print a grid to test tab-stops with the curses interface",
+       "",
+       "Options:",
+       " -l COUNT total number of lines to show",
+       " -t NUM   set TABSIZE variable to the given value",
+    };
+    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 tabstop;
+    int n, col, row, step;
+    int line_limit = -1;
+    int curses_stops = -1;
+
+    while ((n = getopt(argc, argv, "l:t:")) != -1) {
+       switch (n) {
+       case 'l':
+           line_limit = atoi(optarg);
+           break;
+       case 't':
+           curses_stops = atoi(optarg);
+           break;
+       default:
+           usage();
+           break;
+       }
+    }
+
+    initscr();
+    noecho();
+    cbreak();
+    if (curses_stops > 0)
+       set_tabsize(curses_stops);
+    tabstop = tigetnum("it");
+    if (tabstop <= 0)
+       tabstop = 8;
+    for (row = 0; row < LINES; ++row) {
+       move(row, 0);
+       for (col = step = 0; col < COLS - 1; ++col) {
+           if (row == 0) {
+               chtype ch = '-';
+               if ((col % tabstop) == 0)
+                   ch = '+';
+               addch(ch);
+           } else if (col + 1 < row) {
+               addch('*');
+           } else {
+               printw("%x", step);
+               col = (row + (tabstop * ++step));
+               col /= tabstop;
+               col *= tabstop;
+               col -= 1;
+               if ((col + tabstop) < COLS)
+                   addch('\t');
+               refresh();
+           }
+       }
+       addch('\n');
+       if (line_limit > 0 && row >= line_limit)
+           break;
+    }
+    getch();
+    endwin();
+    ExitProgram(EXIT_SUCCESS);
+}