4  *  buttons.c -- draw buttons, e.g., OK/Cancel
6  *  Copyright 2000-2020,2021	Thomas E. Dickey
31 #define MIN_BUTTON (-dialog_state.visit_cols)
42 	int left = (longest - len) / 2;  in center_label()
43 	right = (longest - len - left);  in center_label()
65     mbstate_t state;  in string_to_char()  local
67     memset(&state, 0, sizeof(state));  in string_to_char()
68     len = mbrlen(string, have, &state);  in string_to_char()
73 	memset(&state, 0, sizeof(state));  in string_to_char()
75 	check = mbrtowc(cmp2, string, len, &state);  in string_to_char()
93 count_labels(const char **labels)  in count_labels()  argument
96     if (labels != 0) {  in count_labels()
97 	while (*labels++ != 0) {  in count_labels()
125  * Determine the hot-keys for a set of button-labels.  Normally these are
127  * button has the same first-uppercase, then we will (attempt to) look for
133 get_hotkeys(const char **labels)  in get_hotkeys()  argument
136     size_t count = count_labels(labels);  in get_hotkeys()
142 	    const char *label = labels[n];  in get_hotkeys()
152 		if ((last - first) != 1) {  in get_hotkeys()
180     HOTKEY state = sFIND_KEY;  in print_button()  local
201 	switch (state) {  in print_button()
205 	    if ((last - first) != 1) {  in print_button()
212 		state = sHAVE_KEY;  in print_button()
217 	    state = sHAD_KEY;  in print_button()
222 	waddnstr(win, label + first, last - first);  in print_button()
237 dlg_button_count(const char **labels)  in dlg_button_count()  argument
240     while (*labels++ != 0)  in dlg_button_count()
250 dlg_button_sizes(const char **labels,  in dlg_button_sizes()  argument
259     for (n = 0; labels[n] != 0; n++) {  in dlg_button_sizes()
264 	    int len = dlg_count_columns(labels[n]);  in dlg_button_sizes()
274     if (*longest < 6 - (*longest & 1))  in dlg_button_sizes()
275 	*longest = 6 - (*longest & 1);  in dlg_button_sizes()
284 dlg_button_x_step(const char **labels, int limit, int *gap, int *margin, int *step)  in dlg_button_x_step()  argument
286     int count = dlg_button_count(labels);  in dlg_button_x_step()
296 	dlg_button_sizes(labels, FALSE, &longest, &length);  in dlg_button_x_step()
298 	unused = limit - used;  in dlg_button_x_step()
307 	*step = *gap + (used + count - 1) / count;  in dlg_button_x_step()
319 dlg_button_layout(const char **labels, int *limit)  in dlg_button_layout()  argument
323     if (labels != 0 && dlg_button_count(labels)) {  in dlg_button_layout()
326 	while (!dlg_button_x_step(labels, width, &gap, &margin, &step))  in dlg_button_layout()
342 		 const char **labels,  in dlg_draw_buttons()  argument
361     dlg_button_sizes(labels, vertical, &longest, &length);  in dlg_draw_buttons()
367 	dlg_button_x_step(labels, limit, &gap, &margin, &step);  in dlg_draw_buttons()
378 	int *hotkeys = get_hotkeys(labels);  in dlg_draw_buttons()
382 	for (n = 0; labels[n] != 0; ++n) {  in dlg_draw_buttons()
383 	    need += strlen(labels[n]) + 1;  in dlg_draw_buttons()
389 	 * Draw the labels.  in dlg_draw_buttons()
391 	for (n = 0; labels[n] != 0; n++) {  in dlg_draw_buttons()
392 	    center_label(buffer, longest, labels[n]);  in dlg_draw_buttons()
395 			 CHR_BUTTON ? hotkeys[n] : -1,  in dlg_draw_buttons()
451     int cmp = -1;  in dlg_button_to_char()
464  * Given a list of button labels, and a character which may be the abbreviation
469 dlg_char_to_button(int ch, const char **labels)  in dlg_char_to_button()  argument
473     if (labels != 0) {  in dlg_char_to_button()
474 	int *hotkeys = get_hotkeys(labels);  in dlg_char_to_button()
481 	    for (j = 0; labels[j] != 0; ++j) {  in dlg_char_to_button()
552  * Return a list of button labels.
566 	static const char *labels[3];  in dlg_exit_label()  local
570 	    labels[n++] = my_exit_label();  in dlg_exit_label()
572 	    labels[n++] = my_help_label();  in dlg_exit_label()
574 	    labels[n++] = my_exit_label();  in dlg_exit_label()
575 	labels[n] = 0;  in dlg_exit_label()
577 	result = labels;  in dlg_exit_label()
583  * Map the given button index for dlg_exit_label() into our exit-code.
602 finish_ok_label(const char **labels, int n)  in finish_ok_label()  argument
605 	labels[n++] = my_ok_label();  in finish_ok_label()
607 	dlg_trace_msg("# ignore --nook, since at least one button is needed\n");  in finish_ok_label()
610     labels[n] = NULL;  in finish_ok_label()
611     return labels;  in finish_ok_label()
615  * Return a list of button labels for the OK (no Cancel) group, used in msgbox
621     static const char *labels[4];  in dlg_ok_label()  local
625 	labels[n++] = my_ok_label();  in dlg_ok_label()
627 	labels[n++] = my_extra_label();  in dlg_ok_label()
629 	labels[n++] = my_help_label();  in dlg_ok_label()
631     return finish_ok_label(labels, n);  in dlg_ok_label()
635  * Return a list of button labels for the OK/Cancel group, used in most widgets
641     static const char *labels[5];  in dlg_ok_labels()  local
645 	labels[n++] = my_ok_label();  in dlg_ok_labels()
647 	labels[n++] = my_extra_label();  in dlg_ok_labels()
649 	labels[n++] = my_cancel_label();  in dlg_ok_labels()
651 	labels[n++] = my_help_label();  in dlg_ok_labels()
653     return finish_ok_label(labels, n);  in dlg_ok_labels()
657  * Map the given button index for dlg_ok_labels() into our exit-code
701     int result = current - 1;  in dlg_prev_ok_buttonindex()
712  * Find the button-index for the "OK" or "Cancel" button, according to
713  * whether --defaultno is given.  If --nocancel was given, we always return
714  * the index for the first button (usually "OK" unless --nook was used).
730  * Find the button-index for a button named with --default-button. If the
732  * the index of the first button (usually "OK" unless --nook was used).
754  * Return a list of buttons for Yes/No labels.
764 	static const char *labels[4];  in dlg_yes_labels()  local
767 	labels[n++] = my_yes_label();  in dlg_yes_labels()
768 	labels[n++] = my_no_label();  in dlg_yes_labels()
770 	    labels[n++] = my_help_label();  in dlg_yes_labels()
771 	labels[n] = 0;  in dlg_yes_labels()
773 	result = labels;  in dlg_yes_labels()
780  * Map the given button index for dlg_yes_labels() into our exit-code.
801  * Return the next index in labels[];
804 dlg_next_button(const char **labels, int button)  in dlg_next_button()  argument
806     if (button < -1)  in dlg_next_button()
807 	button = -1;  in dlg_next_button()
809     if (labels[button + 1] != 0) {  in dlg_next_button()
818  * Return the previous index in labels[];
821 dlg_prev_button(const char **labels, int button)  in dlg_prev_button()  argument
824 	--button;  in dlg_prev_button()
826 	if (button < -1)  in dlg_prev_button()
827 	    button = -1;  in dlg_prev_button()
829 	while (labels[button + 1] != 0)  in dlg_prev_button()