--- /dev/null
+/****************************************************************************
+ * Copyright (c) 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 *
+ * "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: demo_new_pair.c,v 1.10 2017/03/10 09:47:15 tom Exp $
+ *
+ * Demonstrate the alloc_pair() function.
+ */
+
+#include <test.priv.h>
+#include <time.h>
+
+#if HAVE_ALLOC_PAIR && USE_WIDEC_SUPPORT
+
+#define MAX_BITS 8 /* all but A_ALTCHARSET */
+#define MAX_ATTR ((1<<MAX_BITS)-1)
+
+static bool
+valid_cap(NCURSES_CONST char *name)
+{
+ char *value = tigetstr(name);
+ return (value != 0 && value != (char *) -1) ? TRUE : FALSE;
+}
+
+static attr_t
+next_attr(int now)
+{
+ static bool init = FALSE;
+ static attr_t table[MAX_BITS * MAX_BITS];
+ static int limit = 0;
+
+ if (!init) {
+ int j, k;
+ attr_t bits[MAX_BITS];
+
+ init = TRUE;
+ bits[limit++] = A_NORMAL;
+ if (valid_cap("smso"))
+ bits[limit++] = A_STANDOUT;
+ if (valid_cap("smul"))
+ bits[limit++] = A_UNDERLINE;
+ if (valid_cap("rev"))
+ bits[limit++] = A_REVERSE;
+ if (valid_cap("blink"))
+ bits[limit++] = A_BLINK;
+ if (valid_cap("dim"))
+ bits[limit++] = A_DIM;
+ if (valid_cap("bold"))
+ bits[limit++] = A_BOLD;
+ for (j = 0; j < limit; ++j) {
+ for (k = 0; k < limit; ++k) {
+ table[j * limit + k] = bits[j] | bits[k];
+ }
+ }
+ }
+ return table[now % limit];
+}
+
+static void
+our_content(int pair, int *fg, int *bg)
+{
+ pair %= COLOR_PAIRS;
+ *fg = (pair / COLORS) % COLORS;
+ *bg = (pair % COLORS);
+}
+
+static int
+make_color(int now)
+{
+ int fg, bg;
+ our_content(now, &fg, &bg);
+ return alloc_pair(fg, bg);
+}
+
+static int
+next_color(int now)
+{
+ int result = 0;
+ if ((short) now > 0) {
+ if (now < COLOR_PAIRS) {
+ int fg, bg;
+ our_content(now, &fg, &bg);
+ if (init_pair((short) now, (short) fg, (short) bg) != OK)
+ now = ERR;
+ } else {
+ now %= COLOR_PAIRS;
+ }
+ result = now;
+ }
+ return result;
+}
+
+static void
+show_help(const char **help)
+{
+ WINDOW *mywin = newwin(LINES, COLS, 0, 0);
+ int n;
+
+ wmove(mywin, 1, 1);
+ for (n = 0; help[n] != 0; ++n) {
+ wmove(mywin, 1 + n, 2);
+ wprintw(mywin, "%.*s\n", COLS - 4, help[n]);
+ }
+ box(mywin, 0, 0);
+ wgetch(mywin);
+ delwin(mywin);
+ touchwin(stdscr);
+ refresh();
+}
+
+static time_t
+now(void)
+{
+ return time((time_t *) 0);
+}
+
+static void
+usage(void)
+{
+ static const char *msg[] =
+ {
+ "Usage: demo_new_pair [options]",
+ "",
+ "Repeatedly print using all possible color combinations.",
+ "",
+ "Options:",
+ " -i use init_pair rather than alloc_pair",
+ " -p start in paged-mode",
+ " -s start in single-step mode",
+ " -w print a wide-character cell",
+ };
+ unsigned n;
+ for (n = 0; n < SIZEOF(msg); ++n) {
+ fprintf(stderr, "%s\n", msg[n]);
+ }
+ ExitProgram(EXIT_FAILURE);
+}
+
+#define use_pages() \
+ paged_mode = TRUE, single_mode = TRUE
+
+#define use_single() \
+ paged_mode = FALSE, single_mode = TRUE
+
+#define update_modes() \
+ scrollok(stdscr, !paged_mode); \
+ nodelay(stdscr, !single_mode || paged_mode)
+
+int
+main(int argc, char *argv[])
+{
+ static const char *help[] =
+ {
+ "This program iterates over the possible color combinations,",
+ "allocating or initializing color pairs. For best results,",
+ "choose screen-width dividing evenly into the number of colors,",
+ "e.g.,",
+ "",
+ " 32x64,32x128 256 colors",
+ " 24x44,24x88 88 colors",
+ " 32x64,24x128 16 colors",
+ "",
+ "Keys:",
+ " c toggle between coloring and de-coloring cells",
+ " p show one page at a time",
+ " s show one character at a time",
+ " <space> display char/page without pausing",
+ " v/V cycle through video attributes",
+ " w toggle between \"#\" and a double-width equivalent",
+ " ? print this screen (exit on any character).",
+ "",
+ "To exit this program, press ^Q, ^[ or \"q\".",
+ 0
+ };
+
+ bool done = FALSE;
+ bool clobber = FALSE;
+ bool hascolor = FALSE;
+ bool use_init = FALSE;
+ bool use_wide = FALSE;
+ bool paged_mode = FALSE;
+ bool single_mode = FALSE;
+ int video_mode = 0;
+ int current;
+ int ch;
+ wchar_t wch[2];
+ time_t start = now();
+ long total_cells = 0;
+
+ setlocale(LC_ALL, "");
+
+ while ((ch = getopt(argc, argv, "ipsw")) != -1) {
+ switch (ch) {
+ case 'i':
+ use_init = TRUE;
+ break;
+ case 'p':
+ use_pages();
+ break;
+ case 's':
+ use_single();
+ break;
+ case 'w':
+ use_wide = TRUE;
+ break;
+ default:
+ usage();
+ break;
+ }
+ }
+
+ if (newterm(NULL, stderr, stdin) == 0)
+ usage();
+ (void) cbreak(); /* read chars without wait for \n */
+ (void) noecho(); /* don't echo input */
+ update_modes();
+ curs_set(0);
+
+ keypad(stdscr, TRUE);
+
+ if ((hascolor = has_colors())) {
+ start_color();
+ current = 1;
+ } else {
+ current = 0;
+ }
+
+ /*
+ * Repeatedly cycle through all colors, initializing pairs as needed.
+ * Provide for single-stepping, or page-at-a-time, as well as quitting.
+ */
+ while (!done) {
+ cchar_t temp;
+ attr_t my_attrs;
+ int my_pair;
+
+ switch (getch()) {
+ case '?':
+ show_help(help);
+ break;
+ case 'p':
+ /* step-by-page */
+ use_pages();
+ update_modes();
+ break;
+ case 's':
+ /* step-by-char */
+ use_single();
+ update_modes();
+ break;
+ case ' ':
+ single_mode = FALSE;
+ update_modes();
+ break;
+ case QUIT:
+ case ESCAPE:
+ case 'q':
+ done = TRUE;
+ continue;
+ case 'c':
+ clobber = !clobber;
+ continue;
+ case 'v':
+ if (--video_mode < 0)
+ video_mode = MAX_ATTR;
+ continue;
+ case 'V':
+ if (video_mode > MAX_ATTR)
+ video_mode = 0;
+ continue;
+ case 'w':
+ use_wide = !use_wide;
+ continue;
+ case ERR:
+ break;
+ default:
+ beep();
+ break;
+ }
+ if (hascolor) {
+ my_attrs = next_attr(video_mode);
+ if (clobber) {
+ int fg, bg;
+ our_content(current, &fg, &bg);
+ my_pair = find_pair(fg, bg);
+ if (my_pair > 0) {
+ free_pair(my_pair);
+ }
+ my_pair = 0;
+ } else {
+ my_pair = (use_init
+ ? next_color(current)
+ : make_color(current));
+ }
+ } else {
+ my_attrs = next_attr(current);
+ my_pair = 0;
+ }
+ if (my_pair < 0)
+ break;
+ wch[0] = use_wide ? 0xff03 : '#';
+ wch[1] = 0;
+ setcchar(&temp, wch, my_attrs, (short) my_pair, NULL);
+ /*
+ * At the end of a page, move the cursor to the home position.
+ */
+ if ((add_wch(&temp) == ERR) && paged_mode) {
+ nodelay(stdscr, !single_mode);
+ move(0, 0);
+ }
+ total_cells += 1 + (use_wide ? 1 : 0);
+ ++current;
+ }
+ endwin();
+
+ printf("%.1f cells/second\n",
+ (double) (total_cells) / (double) (now() - start));
+
+ ExitProgram(EXIT_SUCCESS);
+}
+
+#else
+int
+main(void)
+{
+ printf("This program requires the ncurses alloc_pair function\n");
+ ExitProgram(EXIT_FAILURE);
+}
+#endif
projects / ncurses.git / blobdiff