652 lines
16 KiB
C
652 lines
16 KiB
C
/*
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* $Id: menubox.c,v 1.79 2004/12/20 20:42:58 tom Exp $
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*
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* menubox.c -- implements the menu box
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*
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* AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
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* and: Thomas E. Dickey
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "dialog.h"
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static int menu_width, tag_x, item_x;
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typedef enum {
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Unselected = 0,
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Selected,
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Editing
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} Mode;
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#define INPUT_ROWS 3 /* rows per inputmenu entry */
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#define LLEN(n) ((n) * MENUBOX_TAGS)
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#define ItemData(i) &items[LLEN(i)]
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#define ItemName(i) items[LLEN(i)]
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#define ItemText(i) items[LLEN(i) + 1]
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#define ItemHelp(i) items[LLEN(i) + 2]
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#define RowHeight(i) (dialog_vars.input_menu ? ((i) * INPUT_ROWS) : ((i) * 1))
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#define ItemToRow(i) (dialog_vars.input_menu ? ((i) * INPUT_ROWS + 1) : (i))
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#define RowToItem(i) (dialog_vars.input_menu ? ((i) / INPUT_ROWS + 0) : (i))
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static void
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print_arrows(WINDOW *win,
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int box_x,
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int box_y,
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int scrollamt,
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int max_choice,
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int item_no,
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int menu_height)
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{
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dlg_draw_arrows(win, scrollamt,
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scrollamt + max_choice < item_no,
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box_x + tag_x + 1,
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box_y,
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box_y + menu_height + 1);
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}
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/*
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* Print the tag of a menu-item
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*/
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static void
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print_tag(WINDOW *win,
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char **items,
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int choice,
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Mode selected)
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{
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int my_x = item_x;
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int my_y = ItemToRow(choice);
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int tag_width = (my_x - tag_x - GUTTER);
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const int *cols;
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const int *indx;
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int limit;
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unsigned prefix;
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cols = dlg_index_columns(ItemName(0));
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indx = dlg_index_wchars(ItemName(0));
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limit = dlg_count_wchars(ItemName(0));
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prefix = indx[1] - indx[0];
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/* highlight first char of the tag to be special */
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(void) wmove(win, my_y, tag_x);
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wattrset(win, selected ? tag_key_selected_attr : tag_key_attr);
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if (strlen(ItemName(0)) != 0)
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(void) waddnstr(win, ItemName(0), prefix);
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/* print rest of the string */
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wattrset(win, selected ? tag_selected_attr : tag_attr);
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if (strlen(ItemName(0)) > prefix) {
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limit = dlg_limit_columns(ItemName(0), tag_width, 1);
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if (limit > 0)
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(void) waddnstr(win, ItemName(0) + indx[1], indx[limit] - indx[1]);
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}
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}
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/*
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* Print menu item
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*/
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static void
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print_item(WINDOW *win,
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char **items,
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int choice,
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Mode selected)
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{
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chtype save = getattrs(win);
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int n;
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int my_width = menu_width;
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int my_x = item_x;
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int my_y = ItemToRow(choice);
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chtype attr = A_NORMAL;
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chtype textchar;
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chtype bordchar;
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if (items == 0)
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return;
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switch (selected) {
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default:
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case Unselected:
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textchar = item_attr;
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bordchar = item_attr;
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break;
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case Selected:
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textchar = item_selected_attr;
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bordchar = item_selected_attr;
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break;
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case Editing:
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textchar = inputbox_attr;
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bordchar = dialog_attr;
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break;
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}
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/* Clear 'residue' of last item and mark current current item */
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if (dialog_vars.input_menu) {
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wattrset(win, (selected != Unselected) ? item_selected_attr : item_attr);
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for (n = my_y - 1; n < my_y + INPUT_ROWS - 1; n++) {
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wmove(win, n, 0);
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wprintw(win, "%*s", my_width, " ");
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}
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} else {
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wattrset(win, menubox_attr);
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wmove(win, my_y, 0);
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wprintw(win, "%*s", my_width, " ");
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}
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print_tag(win, items, choice, selected);
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/* Draw the input field box (only for inputmenu) */
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(void) wmove(win, my_y, my_x);
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if (dialog_vars.input_menu) {
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my_width -= 1;
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dlg_draw_box(win, my_y - 1, my_x, INPUT_ROWS, my_width - my_x - tag_x,
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bordchar,
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bordchar);
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my_width -= 1;
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++my_x;
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}
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/* print actual item */
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wmove(win, my_y, my_x);
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wattrset(win, textchar);
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dlg_print_text(win, ItemText(0), my_width - my_x, &attr);
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if (selected) {
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dlg_item_help(ItemHelp(0));
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}
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wattrset(win, save);
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}
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/*
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* Allow the user to edit the text of a menu entry.
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*/
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static int
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input_menu_edit(WINDOW *win, char **items, int choice, char **resultp)
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{
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chtype save = getattrs(win);
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char *result;
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int offset = 0;
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int key = 0, fkey = 0;
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int first = TRUE;
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/* see above */
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int y = ItemToRow(choice);
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int code = TRUE;
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result = malloc(dialog_vars.max_input);
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assert_ptr(result, "input_menu_edit");
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/* original item is used to initialize the input string. */
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result[0] = '\0';
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strcpy(result, ItemText(0));
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print_item(win, items, choice, Editing);
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/* taken out of inputbox.c - but somewhat modified */
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for (;;) {
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if (!first)
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key = dlg_mouse_wgetch(win, &fkey);
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if (dlg_edit_string(result, &offset, key, fkey, first)) {
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/*
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* menu_width - 2 ..... it's the actual number of maximal
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* possible characters could be written
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* to the screen.
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*
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* item_x - tag_x - 2 . same as "name_width"
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* ( see in dialog_menu() )
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*/
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dlg_show_string(win, result, offset, inputbox_attr,
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y, item_x + 1, menu_width - item_x - 3,
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FALSE, first);
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first = FALSE;
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} else if (key == ESC || key == TAB) {
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code = FALSE;
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break;
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} else {
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break;
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}
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}
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print_item(win, items, choice, Selected);
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wattrset(win, save);
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*resultp = result;
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return code;
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}
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static int
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handle_button(int code, char **items, int choice)
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{
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switch (code) {
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case DLG_EXIT_OK: /* FALLTHRU */
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case DLG_EXIT_EXTRA:
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dlg_add_result(ItemName(choice));
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break;
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case DLG_EXIT_HELP:
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dlg_add_result("HELP ");
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if (USE_ITEM_HELP(ItemHelp(choice))) {
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dlg_add_result(ItemHelp(choice));
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code = DLG_EXIT_ITEM_HELP;
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} else {
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dlg_add_result(ItemName(choice));
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}
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break;
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}
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return code;
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}
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/*
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* Display a menu for choosing among a number of options
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*/
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int
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dialog_menu(const char *title, const char *cprompt, int height, int width,
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int menu_height, int item_no, char **items)
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{
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int i, j, x, y, cur_x, cur_y, box_x, box_y;
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int key = 0, fkey;
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int button = dialog_state.visit_items ? -1 : dlg_defaultno_button();
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int choice = dlg_default_item(items, MENUBOX_TAGS);
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int result = DLG_EXIT_UNKNOWN;
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int scrollamt = 0;
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int max_choice, min_width;
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int found;
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int use_width, name_width, text_width;
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WINDOW *dialog, *menu;
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char *prompt = dlg_strclone(cprompt);
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const char **buttons = dlg_ok_labels();
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dlg_tab_correct_str(prompt);
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if (menu_height == 0) {
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min_width = dlg_calc_listw(item_no, items, MENUBOX_TAGS) + 10;
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/* calculate height without items (4) */
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dlg_auto_size(title, prompt, &height, &width, 4, MAX(26, min_width));
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dlg_calc_listh(&height, &menu_height, item_no);
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} else {
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dlg_auto_size(title, prompt, &height, &width, 4 + menu_height, 26);
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}
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dlg_print_size(height, width);
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dlg_ctl_size(height, width);
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/* Find out maximal number of displayable items at once. */
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max_choice = MIN(menu_height,
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RowHeight(item_no));
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if (dialog_vars.input_menu)
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max_choice /= INPUT_ROWS;
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x = dlg_box_x_ordinate(width);
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y = dlg_box_y_ordinate(height);
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dialog = dlg_new_window(height, width, y, x);
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dlg_mouse_setbase(x, y);
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dlg_draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
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dlg_draw_bottom_box(dialog);
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dlg_draw_title(dialog, title);
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wattrset(dialog, dialog_attr);
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dlg_print_autowrap(dialog, prompt, height, width);
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menu_width = width - 6;
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getyx(dialog, cur_y, cur_x);
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box_y = cur_y + 1;
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box_x = (width - menu_width) / 2 - 1;
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/* create new window for the menu */
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menu = dlg_sub_window(dialog, menu_height, menu_width,
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y + box_y + 1,
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x + box_x + 1);
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/* draw a box around the menu items */
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dlg_draw_box(dialog, box_y, box_x, menu_height + 2, menu_width + 2,
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menubox_border_attr, menubox_attr);
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name_width = 0;
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text_width = 0;
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/* Find length of longest item to center menu *
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* only if --menu was given, using --inputmenu *
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* won't be centered. */
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for (i = 0; i < item_no; i++) {
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name_width = MAX(name_width, dlg_count_columns(ItemName(i)));
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text_width = MAX(text_width, dlg_count_columns(ItemText(i)));
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}
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/* If the name+text is wider than the list is allowed, then truncate
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* one or both of them. If the name is no wider than 30% of the list,
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* leave it intact.
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*
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* FIXME: the gutter width and name/list ratio should be configurable.
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*/
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use_width = (menu_width - GUTTER);
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if (text_width + name_width > use_width) {
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int need = (int) (0.30 * use_width);
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if (name_width > need) {
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int want = (int) (use_width
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* ((double) name_width)
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/ (text_width + name_width));
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name_width = (want > need) ? want : need;
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}
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text_width = use_width - name_width;
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}
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tag_x = (dialog_vars.input_menu
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? 0
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: (use_width - text_width - name_width) / 2);
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item_x = name_width + tag_x + GUTTER;
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if (choice - scrollamt >= max_choice) {
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scrollamt = choice - (max_choice - 1);
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choice = max_choice - 1;
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}
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/* Print the menu */
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for (i = 0; i < max_choice; i++) {
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print_item(menu,
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ItemData(i + scrollamt),
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i,
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(i == choice) ? Selected : Unselected);
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}
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(void) wnoutrefresh(menu);
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/* register the new window, along with its borders */
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dlg_mouse_mkbigregion(box_y + 1, box_x, menu_height + 2, menu_width + 2,
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KEY_MAX, 1, 1, 1 /* by lines */ );
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print_arrows(dialog, box_x, box_y, scrollamt, max_choice, item_no, menu_height);
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dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
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while (result == DLG_EXIT_UNKNOWN) {
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if (button < 0) /* --visit-items */
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wmove(dialog, box_y + ItemToRow(choice) + 1, box_x + tag_x + 1);
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key = dlg_mouse_wgetch(dialog, &fkey);
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if (!fkey) {
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fkey = TRUE;
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switch (key) {
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case '\n':
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case '\r':
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key = KEY_ENTER;
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break;
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case '-':
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key = KEY_UP;
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break;
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case '+':
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key = KEY_DOWN;
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break;
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case ' ':
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case TAB:
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key = KEY_RIGHT;
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break;
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case ESC:
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result = DLG_EXIT_ESC;
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continue;
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default:
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fkey = FALSE;
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break;
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}
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}
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found = FALSE;
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if (fkey) {
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/*
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* Allow a mouse-click on a box to switch selection to that box.
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* Handling a button click is a little more complicated, since we
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* push a KEY_ENTER back onto the input stream so we'll put the
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* cursor at the right place before handling the "keypress".
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*/
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if (key >= (M_EVENT + KEY_MAX)) {
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key -= (M_EVENT + KEY_MAX);
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i = RowToItem(key);
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if (scrollamt + i < max_choice) {
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found = TRUE;
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} else {
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beep();
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continue;
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}
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} else if (key >= M_EVENT
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&& dlg_ok_buttoncode(key - M_EVENT) >= 0) {
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button = (key - M_EVENT);
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ungetch('\n');
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continue;
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}
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} else {
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/*
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* Check if key pressed matches first character of any item tag in
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* list. If there is more than one match, we will cycle through
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* each one as the same key is pressed repeatedly.
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*/
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if (button < 0 || !dialog_state.visit_items) {
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for (j = scrollamt + choice + 1; j < item_no; j++) {
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if (dlg_match_char(dlg_last_getc(), ItemName(j))) {
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found = TRUE;
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i = j - scrollamt;
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break;
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}
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}
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if (!found) {
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for (j = 0; j <= scrollamt + choice; j++) {
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if (dlg_match_char(dlg_last_getc(), ItemName(j))) {
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found = TRUE;
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i = j - scrollamt;
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break;
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}
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}
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}
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if (found)
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dlg_flush_getc();
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} else if ((j = dlg_char_to_button(key, buttons)) >= 0) {
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button = j;
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ungetch('\n');
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continue;
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}
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/*
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* A single digit (1-9) positions the selection to that line in the
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* current screen.
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*/
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if (!found
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&& (key <= '9')
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&& (key > '0')
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&& (key - '1' < max_choice)) {
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found = TRUE;
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i = key - '1';
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}
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}
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if (!found && fkey) {
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found = TRUE;
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switch (key) {
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case KEY_HOME:
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i = -scrollamt;
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break;
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case KEY_LL:
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case KEY_END:
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i = item_no - 1 - scrollamt;
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break;
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case M_EVENT + KEY_PPAGE:
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case KEY_PPAGE:
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if (choice)
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i = 0;
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else if (scrollamt != 0)
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i = -MIN(scrollamt, max_choice);
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else
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continue;
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break;
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case M_EVENT + KEY_NPAGE:
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case KEY_NPAGE:
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i = MIN(choice + max_choice, item_no - scrollamt - 1);
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break;
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case KEY_UP:
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i = choice - 1;
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if (choice == 0 && scrollamt == 0)
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continue;
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break;
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case KEY_DOWN:
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i = choice + 1;
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if (scrollamt + choice >= item_no - 1)
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continue;
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break;
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default:
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found = FALSE;
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break;
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}
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}
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if (found) {
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if (i != choice) {
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getyx(dialog, cur_y, cur_x);
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if (i < 0 || i >= max_choice) {
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#if defined(NCURSES_VERSION_MAJOR) && NCURSES_VERSION_MAJOR < 5
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/*
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* Using wscrl to assist ncurses scrolling is not needed
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* in version 5.x
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*/
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if (i == -1) {
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if (menu_height > 1) {
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/* De-highlight current first item */
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print_item(menu, ItemData(scrollamt), 0, Unselected);
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scrollok(menu, TRUE);
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wscrl(menu, -RowHeight(1));
|
|
scrollok(menu, FALSE);
|
|
}
|
|
scrollamt--;
|
|
print_item(menu, ItemData(scrollamt), 0, Selected);
|
|
} else if (i == max_choice) {
|
|
if (menu_height > 1) {
|
|
/* De-highlight current last item before scrolling up */
|
|
print_item(menu,
|
|
ItemData(scrollamt + max_choice - 1),
|
|
max_choice - 1,
|
|
Unselected);
|
|
scrollok(menu, TRUE);
|
|
wscrl(menu, RowHeight(1));
|
|
scrollok(menu, FALSE);
|
|
}
|
|
scrollamt++;
|
|
print_item(menu,
|
|
ItemData(scrollamt + max_choice - 1),
|
|
max_choice - 1, TRUE);
|
|
} else
|
|
#endif
|
|
{
|
|
if (i < 0) {
|
|
scrollamt += i;
|
|
choice = 0;
|
|
} else {
|
|
choice = max_choice - 1;
|
|
scrollamt += (i - max_choice + 1);
|
|
}
|
|
for (i = 0; i < max_choice; i++) {
|
|
print_item(menu,
|
|
ItemData(scrollamt + i),
|
|
i,
|
|
(i == choice) ? Selected : Unselected);
|
|
}
|
|
}
|
|
/* Clean bottom lines */
|
|
if (dialog_vars.input_menu) {
|
|
int spare_lines, x_count;
|
|
spare_lines = menu_height % INPUT_ROWS;
|
|
wattrset(menu, menubox_attr);
|
|
for (; spare_lines; spare_lines--) {
|
|
wmove(menu, menu_height - spare_lines, 0);
|
|
for (x_count = 0; x_count < menu_width;
|
|
x_count++) {
|
|
waddch(menu, ' ');
|
|
}
|
|
}
|
|
}
|
|
(void) wnoutrefresh(menu);
|
|
print_arrows(dialog,
|
|
box_x, box_y,
|
|
scrollamt, max_choice, item_no, menu_height);
|
|
} else {
|
|
/* De-highlight current item */
|
|
print_item(menu,
|
|
ItemData(scrollamt + choice),
|
|
choice,
|
|
Unselected);
|
|
/* Highlight new item */
|
|
choice = i;
|
|
print_item(menu,
|
|
ItemData(scrollamt + choice),
|
|
choice,
|
|
Selected);
|
|
(void) wnoutrefresh(menu);
|
|
(void) wmove(dialog, cur_y, cur_x);
|
|
wrefresh(dialog);
|
|
}
|
|
}
|
|
continue; /* wait for another key press */
|
|
}
|
|
|
|
if (fkey) {
|
|
switch (key) {
|
|
case KEY_BTAB:
|
|
case KEY_LEFT:
|
|
button = dlg_prev_button(buttons, button);
|
|
dlg_draw_buttons(dialog, height - 2, 0, buttons, button,
|
|
FALSE, width);
|
|
break;
|
|
case KEY_RIGHT:
|
|
button = dlg_next_button(buttons, button);
|
|
dlg_draw_buttons(dialog, height - 2, 0, buttons, button,
|
|
FALSE, width);
|
|
break;
|
|
case KEY_ENTER:
|
|
result = handle_button(dlg_ok_buttoncode(button),
|
|
items,
|
|
scrollamt + choice);
|
|
|
|
if (dialog_vars.input_menu && result == DLG_EXIT_EXTRA) {
|
|
char *tmp;
|
|
|
|
if (input_menu_edit(menu,
|
|
ItemData(scrollamt + choice),
|
|
choice,
|
|
&tmp)) {
|
|
dialog_vars.input_result[0] = '\0';
|
|
dlg_add_result("RENAMED ");
|
|
dlg_add_result(ItemName(scrollamt + choice));
|
|
dlg_add_result(" ");
|
|
dlg_add_result(tmp);
|
|
} else {
|
|
result = DLG_EXIT_UNKNOWN;
|
|
print_item(menu,
|
|
ItemData(scrollamt + choice),
|
|
choice,
|
|
Selected);
|
|
(void) wnoutrefresh(menu);
|
|
}
|
|
free(tmp);
|
|
|
|
dlg_draw_buttons(dialog, height - 2, 0,
|
|
buttons, button, FALSE, width);
|
|
}
|
|
break;
|
|
default:
|
|
flash();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
dlg_mouse_free_regions();
|
|
dlg_del_window(dialog);
|
|
free(prompt);
|
|
return result;
|
|
}
|