ncurses 6.3 - patch 20211211

[ncurses.git] / test / combine.c

diff --git a/test/combine.c b/test/combine.c
new file mode 100644 (file)
index 0000000..0a30dd6
--- /dev/null
+++ b/test/combine.c
@@ -0,0 +1,204 @@
+/****************************************************************************
+ * Copyright 2021 Thomas E. Dickey                                          *
+ *                                                                          *
+ * 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.                                                           *
+ ****************************************************************************/
+/*
+ * $Id: combine.c,v 1.7 2021/12/12 01:10:28 tom Exp $
+ */
+
+#include <test.priv.h>
+
+#if USE_WIDEC_SUPPORT
+
+static int c_opt;
+static int r_opt;
+
+static int
+next_char(int value)
+{
+    do {
+       ++value;
+    } while (!iswprint((wint_t) value));
+    return value;
+}
+
+static void
+do_row(int row, int base_ch, int over_ch)
+{
+    int col = 0;
+    bool done = FALSE;
+    bool reverse = (r_opt && !(row % 2));
+
+    move(row, col);
+    printw("[U+%04X]", over_ch);
+    do {
+       if (c_opt) {
+           wchar_t source[2];
+           cchar_t target;
+           attr_t attr = reverse ? A_REVERSE : A_NORMAL;
+
+           source[1] = 0;
+
+           source[0] = base_ch;
+           setcchar(&target, source, attr, 0, NULL);
+           add_wch(&target);
+
+           source[0] = over_ch;
+           setcchar(&target, source, attr, 0, NULL);
+           add_wch(&target);
+       } else {
+           wchar_t data[3];
+
+           data[0] = base_ch;
+           data[1] = over_ch;
+           data[2] = 0;
+           if (reverse)
+               attr_on(A_REVERSE, NULL);
+           addwstr(data);
+           if (reverse)
+               attr_off(A_REVERSE, NULL);
+       }
+       col = getcurx(stdscr);
+       base_ch = next_char(base_ch);
+       done = (col + 1 >= COLS);
+    } while (!done);
+}
+
+#define LAST_OVER 0x6f
+
+static int
+next_over(int value)
+{
+    if (++value > LAST_OVER)
+       value = 0;
+    return value;
+}
+
+static int
+prev_over(int value)
+{
+    if (--value < 0)
+       value = LAST_OVER;
+    return value;
+}
+
+static void
+do_all(int over_it)
+{
+    int row;
+
+    for (row = 0; row < LINES; ++row) {
+       do_row(row, ' ', 0x300 + over_it);
+       over_it = next_over(over_it);
+    }
+}
+
+static void
+usage(void)
+{
+    static const char *msg[] =
+    {
+       "Usage: combine [options]",
+       "",
+       "Demonstrate combining-characters.",
+       "",
+       "Options:",
+       " -c       use cchar_t data rather than wchar_t string",
+       " -r       draw even-numbered rows in reverse-video",
+    };
+    unsigned n;
+    for (n = 0; n < SIZEOF(msg); ++n) {
+       fprintf(stderr, "%s\n", msg[n]);
+    }
+    ExitProgram(EXIT_FAILURE);
+}
+
+int
+main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED)
+{
+    int n;
+    int over_it = 0;
+    bool done = FALSE;
+
+    while ((n = getopt(argc, argv, "cr")) != -1) {
+       switch (n) {
+       case 'c':
+           c_opt = TRUE;
+           break;
+       case 'r':
+           r_opt = TRUE;
+           break;
+       default:
+           usage();
+           break;
+       }
+    }
+
+    setlocale(LC_ALL, "");
+    initscr();
+    cbreak();
+    noecho();
+    keypad(stdscr, TRUE);
+
+    do {
+       do_all(over_it);
+       switch (getch()) {
+       case 'q':
+       case QUIT:
+       case ESCAPE:
+           done = TRUE;
+           break;
+       case KEY_HOME:
+       case '0':
+           over_it = 0;
+           break;
+       case KEY_END:
+       case '$':
+           over_it = LAST_OVER;
+           break;
+       case KEY_UP:
+       case '-':
+           over_it = prev_over(over_it);
+           break;
+       case KEY_DOWN:
+       case '+':
+           over_it = next_over(over_it);
+           break;
+       }
+    } while (!done);
+
+    endwin();
+
+    ExitProgram(EXIT_SUCCESS);
+}
+#else
+int
+main(void)
+{
+    printf("This program requires wide-curses functions\n");
+    ExitProgram(EXIT_FAILURE);
+}
+#endif