666 lines
13 KiB
C
666 lines
13 KiB
C
/*
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* $Id: buttons.c,v 1.86 2011/06/28 10:46:46 tom Exp $
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*
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* buttons.c -- draw buttons, e.g., OK/Cancel
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*
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* Copyright 2000-2010,2011 Thomas E. Dickey
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License, version 2.1
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, write to
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* Free Software Foundation, Inc.
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* 51 Franklin St., Fifth Floor
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* Boston, MA 02110, USA.
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*/
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#include <dialog.h>
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#include <dlg_keys.h>
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#ifdef NEED_WCHAR_H
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#include <wchar.h>
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#endif
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#define MIN_BUTTON (dialog_state.visit_items ? -1 : 0)
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static void
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center_label(char *buffer, int longest, const char *label)
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{
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int len = dlg_count_columns(label);
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int left = 0, right = 0;
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*buffer = 0;
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if (len < longest) {
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left = (longest - len) / 2;
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right = (longest - len - left);
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if (left > 0)
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sprintf(buffer, "%*s", left, " ");
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}
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strcat(buffer, label);
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if (right > 0)
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sprintf(buffer + strlen(buffer), "%*s", right, " ");
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}
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/*
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* Parse a multibyte character out of the string, set it past the parsed
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* character.
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*/
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static int
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string_to_char(const char **stringp)
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{
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int result;
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#ifdef USE_WIDE_CURSES
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const char *string = *stringp;
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size_t have = strlen(string);
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size_t check;
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size_t len;
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wchar_t cmp2[2];
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mbstate_t state;
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memset(&state, 0, sizeof(state));
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len = mbrlen(string, have, &state);
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if ((int) len > 0 && len <= have) {
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memset(&state, 0, sizeof(state));
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memset(cmp2, 0, sizeof(cmp2));
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check = mbrtowc(cmp2, string, len, &state);
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if ((int) check <= 0)
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cmp2[0] = 0;
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*stringp += len;
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} else {
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cmp2[0] = UCH(*string);
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*stringp += 1;
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}
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result = cmp2[0];
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#else
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const char *string = *stringp;
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result = UCH(*string);
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*stringp += 1;
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#endif
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return result;
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}
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/*
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* Print a button
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*/
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static void
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print_button(WINDOW *win, char *label, int y, int x, int selected)
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{
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int i;
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int state = 0;
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const int *indx = dlg_index_wchars(label);
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int limit = dlg_count_wchars(label);
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chtype key_attr = (selected
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? button_key_active_attr
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: button_key_inactive_attr);
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chtype label_attr = (selected
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? button_label_active_attr
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: button_label_inactive_attr);
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(void) wmove(win, y, x);
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wattrset(win, selected
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? button_active_attr
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: button_inactive_attr);
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(void) waddstr(win, "<");
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wattrset(win, label_attr);
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for (i = 0; i < limit; ++i) {
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int first = indx[i];
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int last = indx[i + 1];
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switch (state) {
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case 0:
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#ifdef USE_WIDE_CURSES
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if ((last - first) != 1) {
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const char *temp = (label + first);
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int cmp = string_to_char(&temp);
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if (dlg_isupper(cmp)) {
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wattrset(win, key_attr);
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state = 1;
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}
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break;
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}
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#endif
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if (dlg_isupper(UCH(label[first]))) {
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wattrset(win, key_attr);
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state = 1;
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}
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break;
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case 1:
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wattrset(win, label_attr);
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state = 2;
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break;
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}
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waddnstr(win, label + first, last - first);
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}
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wattrset(win, selected
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? button_active_attr
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: button_inactive_attr);
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(void) waddstr(win, ">");
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(void) wmove(win, y, x + ((int) strspn(label, " ")) + 1);
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}
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/*
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* Count the buttons in the list.
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*/
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int
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dlg_button_count(const char **labels)
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{
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int result = 0;
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while (*labels++ != 0)
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++result;
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return result;
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}
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/*
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* Compute the size of the button array in columns. Return the total number of
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* columns in *length, and the longest button's columns in *longest
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*/
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void
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dlg_button_sizes(const char **labels,
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int vertical,
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int *longest,
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int *length)
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{
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int n;
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*length = 0;
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*longest = 0;
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for (n = 0; labels[n] != 0; n++) {
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if (vertical) {
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*length += 1;
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*longest = 1;
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} else {
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int len = dlg_count_columns(labels[n]);
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if (len > *longest)
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*longest = len;
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*length += len;
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}
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}
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/*
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* If we can, make all of the buttons the same size. This is only optional
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* for buttons laid out horizontally.
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*/
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if (*longest < 6 - (*longest & 1))
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*longest = 6 - (*longest & 1);
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if (!vertical)
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*length = *longest * n;
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}
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/*
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* Compute the size of the button array.
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*/
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int
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dlg_button_x_step(const char **labels, int limit, int *gap, int *margin, int *step)
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{
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int count = dlg_button_count(labels);
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int longest;
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int length;
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int unused;
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int used;
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if (count == 0)
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return 0;
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dlg_button_sizes(labels, FALSE, &longest, &length);
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used = (length + (count * 2));
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unused = limit - used;
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if ((*gap = unused / (count + 3)) <= 0) {
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if ((*gap = unused / (count + 1)) <= 0)
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*gap = 1;
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*margin = *gap;
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} else {
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*margin = *gap * 2;
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}
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*step = *gap + (used + count - 1) / count;
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return (*gap > 0) && (unused >= 0);
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}
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/*
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* Make sure there is enough space for the buttons
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*/
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void
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dlg_button_layout(const char **labels, int *limit)
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{
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int width = 1;
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int gap, margin, step;
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if (labels != 0 && dlg_button_count(labels)) {
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while (!dlg_button_x_step(labels, width, &gap, &margin, &step))
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++width;
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width += (4 * MARGIN);
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if (width > COLS)
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width = COLS;
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if (width > *limit)
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*limit = width;
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}
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}
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/*
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* Print a list of buttons at the given position.
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*/
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void
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dlg_draw_buttons(WINDOW *win,
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int y, int x,
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const char **labels,
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int selected,
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int vertical,
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int limit)
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{
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chtype save = dlg_get_attrs(win);
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int n;
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int step = 0;
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int length;
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int longest;
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int final_x;
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int final_y;
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int gap;
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int margin;
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size_t need;
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char *buffer;
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dlg_mouse_setbase(getbegx(win), getbegy(win));
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getyx(win, final_y, final_x);
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dlg_button_sizes(labels, vertical, &longest, &length);
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if (vertical) {
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y += 1;
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step = 1;
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} else {
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dlg_button_x_step(labels, limit, &gap, &margin, &step);
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x += margin;
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}
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/*
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* Allocate a buffer big enough for any label.
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*/
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need = (size_t) longest;
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for (n = 0; labels[n] != 0; ++n) {
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need += strlen(labels[n]) + 1;
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}
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buffer = dlg_malloc(char, need);
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assert_ptr(buffer, "dlg_draw_buttons");
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/*
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* Draw the labels.
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*/
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for (n = 0; labels[n] != 0; n++) {
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center_label(buffer, longest, labels[n]);
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mouse_mkbutton(y, x, dlg_count_columns(buffer), n);
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print_button(win, buffer, y, x,
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(selected == n) || (n == 0 && selected < 0));
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if (selected == n)
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getyx(win, final_y, final_x);
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if (vertical) {
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if ((y += step) > limit)
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break;
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} else {
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if ((x += step) > limit)
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break;
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}
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}
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(void) wmove(win, final_y, final_x);
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wrefresh(win);
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free(buffer);
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wattrset(win, save);
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}
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/*
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* Match a given character against the beginning of the string, ignoring case
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* of the given character. The matching string must begin with an uppercase
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* character.
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*/
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int
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dlg_match_char(int ch, const char *string)
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{
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if (string != 0) {
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int cmp2 = string_to_char(&string);
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#ifdef USE_WIDE_CURSES
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wint_t cmp1 = dlg_toupper(ch);
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if (cmp2 != 0 && (wchar_t) cmp1 == (wchar_t) dlg_toupper(cmp2)) {
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return TRUE;
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}
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#else
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if (ch > 0 && ch < 256) {
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if (dlg_toupper(ch) == dlg_toupper(cmp2))
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return TRUE;
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}
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#endif
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}
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return FALSE;
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}
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/*
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* Find the first uppercase character in the label, which we may use for an
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* abbreviation.
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*/
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int
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dlg_button_to_char(const char *label)
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{
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int cmp = -1;
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while (*label != 0) {
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cmp = string_to_char(&label);
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if (dlg_isupper(cmp)) {
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break;
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}
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}
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return cmp;
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}
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/*
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* Given a list of button labels, and a character which may be the abbreviation
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* for one, find it, if it exists. An abbreviation will be the first character
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* which happens to be capitalized in the label.
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*/
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int
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dlg_char_to_button(int ch, const char **labels)
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{
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if (labels != 0) {
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int j;
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ch = (int) dlg_toupper(dlg_last_getc());
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for (j = 0; labels[j] != 0; ++j) {
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int cmp = dlg_button_to_char(labels[j]);
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if (ch == cmp) {
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dlg_flush_getc();
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return j;
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}
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}
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}
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return DLG_EXIT_UNKNOWN;
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}
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static const char *
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my_yes_label(void)
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{
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return (dialog_vars.yes_label != NULL)
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? dialog_vars.yes_label
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: _("Yes");
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}
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static const char *
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my_no_label(void)
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{
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return (dialog_vars.no_label != NULL)
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? dialog_vars.no_label
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: _("No");
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}
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static const char *
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my_ok_label(void)
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{
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return (dialog_vars.ok_label != NULL)
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? dialog_vars.ok_label
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: _("OK");
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}
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static const char *
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my_cancel_label(void)
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{
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return (dialog_vars.cancel_label != NULL)
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? dialog_vars.cancel_label
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: _("Cancel");
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}
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static const char *
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my_exit_label(void)
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{
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return (dialog_vars.exit_label != NULL)
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? dialog_vars.exit_label
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: _("EXIT");
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}
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static const char *
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my_extra_label(void)
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{
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return (dialog_vars.extra_label != NULL)
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? dialog_vars.extra_label
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: _("Extra");
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}
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static const char *
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my_help_label(void)
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{
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return (dialog_vars.help_label != NULL)
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? dialog_vars.help_label
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: _("Help");
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}
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/*
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* Return a list of button labels.
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*/
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const char **
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dlg_exit_label(void)
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{
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const char **result;
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DIALOG_VARS save;
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if (dialog_vars.extra_button) {
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dlg_save_vars(&save);
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dialog_vars.nocancel = TRUE;
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result = dlg_ok_labels();
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dlg_restore_vars(&save);
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} else {
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static const char *labels[3];
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int n = 0;
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if (!dialog_vars.nook)
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labels[n++] = my_exit_label();
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if (dialog_vars.help_button)
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labels[n++] = my_help_label();
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if (n == 0)
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labels[n++] = my_exit_label();
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labels[n] = 0;
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result = labels;
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}
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return result;
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}
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/*
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* Map the given button index for dlg_exit_label() into our exit-code.
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*/
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int
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dlg_exit_buttoncode(int button)
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{
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int result;
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DIALOG_VARS save;
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dlg_save_vars(&save);
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dialog_vars.nocancel = TRUE;
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result = dlg_ok_buttoncode(button);
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dlg_restore_vars(&save);
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return result;
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}
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const char **
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dlg_ok_label(void)
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{
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static const char *labels[3];
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int n = 0;
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labels[n++] = my_ok_label();
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if (dialog_vars.help_button)
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labels[n++] = my_help_label();
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labels[n] = 0;
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return labels;
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}
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/*
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* Return a list of button labels for the OK/Cancel group.
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*/
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const char **
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dlg_ok_labels(void)
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{
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static const char *labels[5];
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int n = 0;
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if (!dialog_vars.nook)
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labels[n++] = my_ok_label();
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if (dialog_vars.extra_button)
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labels[n++] = my_extra_label();
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if (!dialog_vars.nocancel)
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labels[n++] = my_cancel_label();
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if (dialog_vars.help_button)
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labels[n++] = my_help_label();
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labels[n] = 0;
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return labels;
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}
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/*
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* Map the given button index for dlg_ok_labels() into our exit-code
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*/
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int
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dlg_ok_buttoncode(int button)
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{
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int result = DLG_EXIT_ERROR;
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int n = !dialog_vars.nook;
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if (!dialog_vars.nook && (button <= 0)) {
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result = DLG_EXIT_OK;
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} else if (dialog_vars.extra_button && (button == n++)) {
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result = DLG_EXIT_EXTRA;
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} else if (!dialog_vars.nocancel && (button == n++)) {
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result = DLG_EXIT_CANCEL;
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} else if (dialog_vars.help_button && (button == n)) {
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result = DLG_EXIT_HELP;
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}
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return result;
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}
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/*
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* Given that we're using dlg_ok_labels() to list buttons, find the next index
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* in the list of buttons. The 'extra' parameter if negative provides a way to
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* enumerate extra active areas on the widget.
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*/
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int
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dlg_next_ok_buttonindex(int current, int extra)
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{
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int result = current + 1;
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if (current >= 0
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&& dlg_ok_buttoncode(result) < 0)
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result = extra;
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return result;
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}
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/*
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* Similarly, find the previous button index.
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*/
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int
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dlg_prev_ok_buttonindex(int current, int extra)
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{
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int result = current - 1;
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if (result < extra) {
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for (result = 0; dlg_ok_buttoncode(result + 1) >= 0; ++result) {
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;
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}
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}
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return result;
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}
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/*
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* Find the button-index for the "OK" or "Cancel" button, according to
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* whether --defaultno is given. If --nocancel was given, we always return
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* the index for "OK".
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*/
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int
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dlg_defaultno_button(void)
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|
{
|
|
int result = 0;
|
|
|
|
if (dialog_vars.defaultno && !dialog_vars.nocancel) {
|
|
while (dlg_ok_buttoncode(result) != DLG_EXIT_CANCEL)
|
|
++result;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Return a list of buttons for Yes/No labels.
|
|
*/
|
|
const char **
|
|
dlg_yes_labels(void)
|
|
{
|
|
const char **result;
|
|
|
|
if (dialog_vars.extra_button) {
|
|
result = dlg_ok_labels();
|
|
} else {
|
|
static const char *labels[4];
|
|
int n = 0;
|
|
|
|
labels[n++] = my_yes_label();
|
|
labels[n++] = my_no_label();
|
|
if (dialog_vars.help_button)
|
|
labels[n++] = my_help_label();
|
|
labels[n] = 0;
|
|
|
|
result = labels;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Map the given button index for dlg_yes_labels() into our exit-code.
|
|
*/
|
|
int
|
|
dlg_yes_buttoncode(int button)
|
|
{
|
|
int result = DLG_EXIT_ERROR;
|
|
|
|
if (dialog_vars.extra_button) {
|
|
result = dlg_ok_buttoncode(button);
|
|
} else if (button == 0) {
|
|
result = DLG_EXIT_OK;
|
|
} else if (button == 1) {
|
|
result = DLG_EXIT_CANCEL;
|
|
} else if (button == 2 && dialog_vars.help_button) {
|
|
result = DLG_EXIT_HELP;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Return the next index in labels[];
|
|
*/
|
|
int
|
|
dlg_next_button(const char **labels, int button)
|
|
{
|
|
if (labels[button + 1] != 0)
|
|
++button;
|
|
else
|
|
button = MIN_BUTTON;
|
|
return button;
|
|
}
|
|
|
|
/*
|
|
* Return the previous index in labels[];
|
|
*/
|
|
int
|
|
dlg_prev_button(const char **labels, int button)
|
|
{
|
|
if (button > MIN_BUTTON)
|
|
--button;
|
|
else {
|
|
while (labels[button + 1] != 0)
|
|
++button;
|
|
}
|
|
return button;
|
|
}
|