779 lines
20 KiB
C
779 lines
20 KiB
C
/*
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* $Id: menubox.c,v 1.148 2013/09/02 17:15:13 tom Exp $
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*
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* menubox.c -- implements the menu box
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*
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* Copyright 2000-2012,2013 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 Licens, version 2.1e
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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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* An earlier version of this program lists as authors
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* Savio Lam (lam836@cs.cuhk.hk)
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*/
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#include <dialog.h>
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#include <dlg_keys.h>
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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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typedef struct {
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/* the outer-window */
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WINDOW *dialog;
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int box_y;
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int box_x;
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int tag_x;
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int item_x;
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int menu_height;
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int menu_width;
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/* the inner-window */
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WINDOW *menu;
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DIALOG_LISTITEM *items;
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int item_no;
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} ALL_DATA;
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#define MIN_HIGH (1 + (5 * MARGIN))
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#define INPUT_ROWS 3 /* rows per inputmenu entry */
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#define RowHeight(i) (is_inputmenu ? ((i) * INPUT_ROWS) : ((i) * 1))
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#define ItemToRow(i) (is_inputmenu ? ((i) * INPUT_ROWS + 1) : (i))
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#define RowToItem(i) (is_inputmenu ? ((i) / INPUT_ROWS + 0) : (i))
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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(ALL_DATA * data,
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WINDOW *win,
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DIALOG_LISTITEM * item,
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int choice,
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Mode selected,
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bool is_inputmenu)
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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 climit = (data->item_x - data->tag_x - GUTTER);
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int my_width = data->menu_width;
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int my_x = data->item_x;
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int my_y = ItemToRow(choice);
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bool both = (!dialog_vars.no_tags && !dialog_vars.no_items);
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bool first = TRUE;
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chtype bordchar;
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const char *show = (dialog_vars.no_items
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? item->name
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: item->text);
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switch (selected) {
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default:
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case Unselected:
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bordchar = item_attr;
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break;
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case Selected:
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bordchar = item_selected_attr;
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break;
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case Editing:
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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 (is_inputmenu) {
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(void) 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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(void) 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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/* highlight first char of the tag to be special */
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if (both) {
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(void) wmove(win, my_y, data->tag_x);
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dlg_print_listitem(win, item->name, climit, first, selected);
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first = FALSE;
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}
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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 (is_inputmenu) {
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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 - data->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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dlg_print_listitem(win, show, my_width - my_x, first, selected);
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if (selected) {
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dlg_item_help(item->help);
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}
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(void) 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(ALL_DATA * data,
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DIALOG_LISTITEM * items,
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int choice,
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char **resultp)
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{
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chtype save = dlg_get_attrs(data->menu);
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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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bool is_inputmenu = TRUE;
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int y = ItemToRow(choice);
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int code = TRUE;
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int max_len = dlg_max_input(MAX((int) strlen(items->text) + 1, MAX_LEN));
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result = dlg_malloc(char, (size_t) max_len);
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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, items->text);
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print_item(data, data->menu, items, choice, Editing, TRUE);
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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(data->menu, &fkey);
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if (dlg_edit_string(result, &offset, key, fkey, first)) {
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dlg_show_string(data->menu, result, offset, inputbox_attr,
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y,
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data->item_x + 1,
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data->menu_width - data->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(data, data->menu, items, choice, Selected, TRUE);
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(void) wattrset(data->menu, 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, DIALOG_LISTITEM * items, int choice)
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{
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char *help_result;
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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_string(items[choice].name);
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break;
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case DLG_EXIT_HELP:
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dlg_add_help_listitem(&code, &help_result, &items[choice]);
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dlg_add_string(help_result);
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break;
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}
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return code;
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}
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int
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dlg_renamed_menutext(DIALOG_LISTITEM * items, int current, char *newtext)
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{
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if (dialog_vars.input_result)
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dialog_vars.input_result[0] = '\0';
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dlg_add_result("RENAMED ");
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dlg_add_string(items[current].name);
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dlg_add_result(" ");
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dlg_add_string(newtext);
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return DLG_EXIT_EXTRA;
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}
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int
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dlg_dummy_menutext(DIALOG_LISTITEM * items, int current, char *newtext)
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{
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(void) items;
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(void) current;
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(void) newtext;
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return DLG_EXIT_ERROR;
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}
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static void
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print_menu(ALL_DATA * data, int choice, int scrollamt, int max_choice, bool is_inputmenu)
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{
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int i;
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for (i = 0; i < max_choice; i++) {
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print_item(data,
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data->menu,
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&data->items[i + scrollamt],
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i,
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(i == choice) ? Selected : Unselected,
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is_inputmenu);
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}
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/* Clean bottom lines */
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if (is_inputmenu) {
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int spare_lines, x_count;
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spare_lines = data->menu_height % INPUT_ROWS;
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(void) wattrset(data->menu, menubox_attr);
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for (; spare_lines; spare_lines--) {
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wmove(data->menu, data->menu_height - spare_lines, 0);
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for (x_count = 0; x_count < data->menu_width;
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x_count++) {
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waddch(data->menu, ' ');
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}
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}
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}
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(void) wnoutrefresh(data->menu);
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dlg_draw_scrollbar(data->dialog,
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scrollamt,
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scrollamt,
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scrollamt + max_choice,
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data->item_no,
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data->box_x,
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data->box_x + data->menu_width,
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data->box_y,
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data->box_y + data->menu_height + 1,
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menubox_border2_attr,
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menubox_border_attr);
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}
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static bool
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check_hotkey(DIALOG_LISTITEM * items, int choice)
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{
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bool result = FALSE;
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if (dlg_match_char(dlg_last_getc(),
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(dialog_vars.no_tags
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? items[choice].text
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: items[choice].name))) {
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result = TRUE;
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}
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return result;
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}
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/*
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* This is an alternate interface to 'menu' which allows the application
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* to read the list item states back directly without putting them in the
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* output buffer.
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*/
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int
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dlg_menu(const char *title,
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const char *cprompt,
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int height,
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int width,
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int menu_height,
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int item_no,
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DIALOG_LISTITEM * items,
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int *current_item,
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DIALOG_INPUTMENU rename_menutext)
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{
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/* *INDENT-OFF* */
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static DLG_KEYS_BINDING binding[] = {
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HELPKEY_BINDINGS,
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ENTERKEY_BINDINGS,
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DLG_KEYS_DATA( DLGK_FIELD_NEXT, ' ' ),
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DLG_KEYS_DATA( DLGK_FIELD_NEXT, KEY_RIGHT ),
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DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ),
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DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ),
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DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_LEFT ),
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DLG_KEYS_DATA( DLGK_ITEM_NEXT, '+' ),
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DLG_KEYS_DATA( DLGK_ITEM_NEXT, KEY_DOWN ),
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DLG_KEYS_DATA( DLGK_ITEM_NEXT, CHR_NEXT ),
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DLG_KEYS_DATA( DLGK_ITEM_PREV, '-' ),
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DLG_KEYS_DATA( DLGK_ITEM_PREV, KEY_UP ),
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DLG_KEYS_DATA( DLGK_ITEM_PREV, CHR_PREVIOUS ),
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DLG_KEYS_DATA( DLGK_PAGE_FIRST, KEY_HOME ),
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DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_END ),
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DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_LL ),
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DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NPAGE ),
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DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PPAGE ),
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END_KEYS_BINDING
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};
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static DLG_KEYS_BINDING binding2[] = {
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INPUTSTR_BINDINGS,
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HELPKEY_BINDINGS,
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ENTERKEY_BINDINGS,
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END_KEYS_BINDING
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};
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/* *INDENT-ON* */
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#ifdef KEY_RESIZE
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int old_height = height;
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int old_width = width;
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#endif
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ALL_DATA all;
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int i, j, x, y, cur_x, cur_y;
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int key = 0, fkey;
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int button = dialog_state.visit_items ? -1 : dlg_default_button();
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int choice = dlg_default_listitem(items);
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int result = DLG_EXIT_UNKNOWN;
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int scrollamt = 0;
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int max_choice;
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int found;
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int use_width, name_width, text_width, list_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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bool is_inputmenu = ((rename_menutext != 0)
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&& (rename_menutext != dlg_dummy_menutext));
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all.items = items;
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all.item_no = item_no;
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dlg_does_output();
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dlg_tab_correct_str(prompt);
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#ifdef KEY_RESIZE
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retry:
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#endif
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all.menu_height = menu_height;
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use_width = dlg_calc_list_width(item_no, items) + 10;
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use_width = MAX(26, use_width);
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if (all.menu_height == 0) {
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/* calculate height without items (4) */
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dlg_auto_size(title, prompt, &height, &width, MIN_HIGH, use_width);
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dlg_calc_listh(&height, &all.menu_height, item_no);
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} else {
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dlg_auto_size(title, prompt,
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&height, &width,
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MIN_HIGH + all.menu_height, use_width);
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}
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dlg_button_layout(buttons, &width);
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dlg_print_size(height, width);
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dlg_ctl_size(height, width);
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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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all.dialog = dialog;
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dlg_register_window(dialog, "menubox", binding);
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dlg_register_buttons(dialog, "menubox", buttons);
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dlg_mouse_setbase(x, y);
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dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
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dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
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dlg_draw_title(dialog, title);
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(void) wattrset(dialog, dialog_attr);
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dlg_print_autowrap(dialog, prompt, height, width);
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all.menu_width = width - 6;
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getyx(dialog, cur_y, cur_x);
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all.box_y = cur_y + 1;
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all.box_x = (width - all.menu_width) / 2 - 1;
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/*
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* After displaying the prompt, we know how much space we really have.
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* Limit the list to avoid overwriting the ok-button.
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*/
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if (all.menu_height + MIN_HIGH > height - cur_y)
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all.menu_height = height - MIN_HIGH - cur_y;
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if (all.menu_height <= 0)
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all.menu_height = 1;
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/* Find out maximal number of displayable items at once. */
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max_choice = MIN(all.menu_height,
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RowHeight(item_no));
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if (is_inputmenu)
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max_choice /= INPUT_ROWS;
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/* create new window for the menu */
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menu = dlg_sub_window(dialog, all.menu_height, all.menu_width,
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y + all.box_y + 1,
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x + all.box_x + 1);
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all.menu = menu;
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dlg_register_window(menu, "menu", binding2);
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dlg_register_buttons(menu, "menu", buttons);
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/* draw a box around the menu items */
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dlg_draw_box(dialog,
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all.box_y, all.box_x,
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all.menu_height + 2, all.menu_width + 2,
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menubox_border_attr, menubox_border2_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(items[i].name));
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text_width = MAX(text_width, dlg_count_columns(items[i].text));
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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 = (all.menu_width - GUTTER);
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if (dialog_vars.no_tags) {
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list_width = MIN(use_width, text_width);
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} else if (dialog_vars.no_items) {
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list_width = MIN(use_width, name_width);
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} else {
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if (text_width >= 0
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&& name_width >= 0
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&& use_width > 0
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&& 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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list_width = (text_width + name_width);
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}
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all.tag_x = (is_inputmenu
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? 0
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: (use_width - list_width) / 2);
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all.item_x = ((dialog_vars.no_tags
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? 0
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: (dialog_vars.no_items
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? 0
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: (GUTTER + name_width)))
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+ all.tag_x);
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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_menu(&all, choice, scrollamt, max_choice, is_inputmenu);
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/* register the new window, along with its borders */
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dlg_mouse_mkbigregion(all.box_y + 1, all.box_x,
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all.menu_height + 2, all.menu_width + 2,
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KEY_MAX, 1, 1, 1 /* by lines */ );
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dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
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dlg_trace_win(dialog);
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while (result == DLG_EXIT_UNKNOWN) {
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if (button < 0) /* --visit-items */
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wmove(dialog,
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all.box_y + ItemToRow(choice) + 1,
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all.box_x + all.tag_x + 1);
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key = dlg_mouse_wgetch(dialog, &fkey);
|
|
if (dlg_result_key(key, fkey, &result))
|
|
break;
|
|
|
|
found = FALSE;
|
|
if (fkey) {
|
|
/*
|
|
* Allow a mouse-click on a box to switch selection to that box.
|
|
* Handling a button click is a little more complicated, since we
|
|
* push a KEY_ENTER back onto the input stream so we'll put the
|
|
* cursor at the right place before handling the "keypress".
|
|
*/
|
|
if (key >= DLGK_MOUSE(KEY_MAX)) {
|
|
key -= DLGK_MOUSE(KEY_MAX);
|
|
i = RowToItem(key);
|
|
if (i < max_choice) {
|
|
found = TRUE;
|
|
} else {
|
|
beep();
|
|
continue;
|
|
}
|
|
} else if (is_DLGK_MOUSE(key)
|
|
&& dlg_ok_buttoncode(key - M_EVENT) >= 0) {
|
|
button = (key - M_EVENT);
|
|
ungetch('\n');
|
|
continue;
|
|
}
|
|
} else {
|
|
/*
|
|
* Check if key pressed matches first character of any item tag in
|
|
* list. If there is more than one match, we will cycle through
|
|
* each one as the same key is pressed repeatedly.
|
|
*/
|
|
if (button < 0 || !dialog_state.visit_items) {
|
|
for (j = scrollamt + choice + 1; j < item_no; j++) {
|
|
if (check_hotkey(items, j)) {
|
|
found = TRUE;
|
|
i = j - scrollamt;
|
|
break;
|
|
}
|
|
}
|
|
if (!found) {
|
|
for (j = 0; j <= scrollamt + choice; j++) {
|
|
if (check_hotkey(items, j)) {
|
|
found = TRUE;
|
|
i = j - scrollamt;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (found)
|
|
dlg_flush_getc();
|
|
} else if ((j = dlg_char_to_button(key, buttons)) >= 0) {
|
|
button = j;
|
|
ungetch('\n');
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* A single digit (1-9) positions the selection to that line in the
|
|
* current screen.
|
|
*/
|
|
if (!found
|
|
&& (key <= '9')
|
|
&& (key > '0')
|
|
&& (key - '1' < max_choice)) {
|
|
found = TRUE;
|
|
i = key - '1';
|
|
}
|
|
}
|
|
|
|
if (!found && fkey) {
|
|
found = TRUE;
|
|
switch (key) {
|
|
case DLGK_PAGE_FIRST:
|
|
i = -scrollamt;
|
|
break;
|
|
case DLGK_PAGE_LAST:
|
|
i = item_no - 1 - scrollamt;
|
|
break;
|
|
case DLGK_MOUSE(KEY_PPAGE):
|
|
case DLGK_PAGE_PREV:
|
|
if (choice)
|
|
i = 0;
|
|
else if (scrollamt != 0)
|
|
i = -MIN(scrollamt, max_choice);
|
|
else
|
|
continue;
|
|
break;
|
|
case DLGK_MOUSE(KEY_NPAGE):
|
|
case DLGK_PAGE_NEXT:
|
|
i = MIN(choice + max_choice, item_no - scrollamt - 1);
|
|
break;
|
|
case DLGK_ITEM_PREV:
|
|
i = choice - 1;
|
|
if (choice == 0 && scrollamt == 0)
|
|
continue;
|
|
break;
|
|
case DLGK_ITEM_NEXT:
|
|
i = choice + 1;
|
|
if (scrollamt + choice >= item_no - 1)
|
|
continue;
|
|
break;
|
|
default:
|
|
found = FALSE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (found) {
|
|
if (i != choice) {
|
|
getyx(dialog, cur_y, cur_x);
|
|
if (i < 0 || i >= max_choice) {
|
|
if (i < 0) {
|
|
scrollamt += i;
|
|
choice = 0;
|
|
} else {
|
|
choice = max_choice - 1;
|
|
scrollamt += (i - max_choice + 1);
|
|
}
|
|
print_menu(&all, choice, scrollamt, max_choice, is_inputmenu);
|
|
} else {
|
|
choice = i;
|
|
print_menu(&all, choice, scrollamt, max_choice, is_inputmenu);
|
|
(void) wmove(dialog, cur_y, cur_x);
|
|
wrefresh(dialog);
|
|
}
|
|
}
|
|
continue; /* wait for another key press */
|
|
}
|
|
|
|
if (fkey) {
|
|
switch (key) {
|
|
case DLGK_FIELD_PREV:
|
|
button = dlg_prev_button(buttons, button);
|
|
dlg_draw_buttons(dialog, height - 2, 0, buttons, button,
|
|
FALSE, width);
|
|
break;
|
|
case DLGK_FIELD_NEXT:
|
|
button = dlg_next_button(buttons, button);
|
|
dlg_draw_buttons(dialog, height - 2, 0, buttons, button,
|
|
FALSE, width);
|
|
break;
|
|
case DLGK_ENTER:
|
|
if (is_inputmenu)
|
|
result = dlg_ok_buttoncode(button);
|
|
else
|
|
result = dlg_enter_buttoncode(button);
|
|
|
|
/*
|
|
* If dlg_menu() is called from dialog_menu(), we want to
|
|
* capture the results into dialog_vars.input_result.
|
|
*/
|
|
if (result == DLG_EXIT_ERROR) {
|
|
result = DLG_EXIT_UNKNOWN;
|
|
} else if (is_inputmenu
|
|
|| rename_menutext == dlg_dummy_menutext) {
|
|
result = handle_button(result,
|
|
items,
|
|
scrollamt + choice);
|
|
}
|
|
|
|
/*
|
|
* If we have a rename_menutext function, interpret the Extra
|
|
* button as a request to rename the menu's text. If that
|
|
* function doesn't return "Unknown", we will exit from this
|
|
* function. Usually that is done for dialog_menu(), so the
|
|
* shell script can use the updated value. If it does return
|
|
* "Unknown", update the list item only. A direct caller of
|
|
* dlg_menu() can free the renamed value - we cannot.
|
|
*/
|
|
if (is_inputmenu && result == DLG_EXIT_EXTRA) {
|
|
char *tmp;
|
|
|
|
if (input_menu_edit(&all,
|
|
&items[scrollamt + choice],
|
|
choice,
|
|
&tmp)) {
|
|
result = rename_menutext(items, scrollamt + choice, tmp);
|
|
if (result == DLG_EXIT_UNKNOWN) {
|
|
items[scrollamt + choice].text = tmp;
|
|
} else {
|
|
free(tmp);
|
|
}
|
|
} else {
|
|
result = DLG_EXIT_UNKNOWN;
|
|
print_item(&all,
|
|
menu,
|
|
&items[scrollamt + choice],
|
|
choice,
|
|
Selected,
|
|
is_inputmenu);
|
|
(void) wnoutrefresh(menu);
|
|
free(tmp);
|
|
}
|
|
|
|
if (result == DLG_EXIT_UNKNOWN) {
|
|
dlg_draw_buttons(dialog, height - 2, 0,
|
|
buttons, button, FALSE, width);
|
|
}
|
|
}
|
|
break;
|
|
#ifdef KEY_RESIZE
|
|
case KEY_RESIZE:
|
|
/* reset data */
|
|
height = old_height;
|
|
width = old_width;
|
|
/* repaint */
|
|
dlg_clear();
|
|
dlg_del_window(dialog);
|
|
refresh();
|
|
dlg_mouse_free_regions();
|
|
goto retry;
|
|
#endif
|
|
default:
|
|
flash();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
dlg_mouse_free_regions();
|
|
dlg_unregister_window(menu);
|
|
dlg_del_window(dialog);
|
|
free(prompt);
|
|
|
|
*current_item = scrollamt + choice;
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Display a menu for choosing among a number of options
|
|
*/
|
|
int
|
|
dialog_menu(const char *title,
|
|
const char *cprompt,
|
|
int height,
|
|
int width,
|
|
int menu_height,
|
|
int item_no,
|
|
char **items)
|
|
{
|
|
int result;
|
|
int choice;
|
|
int i, j;
|
|
DIALOG_LISTITEM *listitems;
|
|
|
|
listitems = dlg_calloc(DIALOG_LISTITEM, (size_t) item_no + 1);
|
|
assert_ptr(listitems, "dialog_menu");
|
|
|
|
for (i = j = 0; i < item_no; ++i) {
|
|
listitems[i].name = items[j++];
|
|
listitems[i].text = (dialog_vars.no_items
|
|
? dlg_strempty()
|
|
: items[j++]);
|
|
listitems[i].help = ((dialog_vars.item_help)
|
|
? items[j++]
|
|
: dlg_strempty());
|
|
}
|
|
dlg_align_columns(&listitems[0].text, sizeof(DIALOG_LISTITEM), item_no);
|
|
|
|
result = dlg_menu(title,
|
|
cprompt,
|
|
height,
|
|
width,
|
|
menu_height,
|
|
item_no,
|
|
listitems,
|
|
&choice,
|
|
(dialog_vars.input_menu
|
|
? dlg_renamed_menutext
|
|
: dlg_dummy_menutext));
|
|
|
|
dlg_free_columns(&listitems[0].text, sizeof(DIALOG_LISTITEM), item_no);
|
|
free(listitems);
|
|
return result;
|
|
}
|