| Current Path : /usr/src/contrib/dialog/ |
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| Current File : //usr/src/contrib/dialog/checklist.c |
/*
* $Id: checklist.c,v 1.127 2011/06/29 23:04:09 tom Exp $
*
* checklist.c -- implements the checklist box
*
* Copyright 2000-2010,2011 Thomas E. Dickey
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License, version 2.1
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to
* Free Software Foundation, Inc.
* 51 Franklin St., Fifth Floor
* Boston, MA 02110, USA.
*
* An earlier version of this program lists as authors:
* Savio Lam (lam836@cs.cuhk.hk)
* Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
* Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
*/
#include <dialog.h>
#include <dlg_keys.h>
static int list_width, check_x, item_x, checkflag;
#define MIN_HIGH (1 + (5 * MARGIN))
#define LLEN(n) ((n) * CHECKBOX_TAGS)
#define ItemData(i) &items[LLEN(i)]
#define ItemName(i) items[LLEN(i)]
#define ItemText(i) items[LLEN(i) + 1]
#define ItemStatus(i) items[LLEN(i) + 2]
#define ItemHelp(i) items[LLEN(i) + 3]
static void
print_arrows(WINDOW *win,
int box_x,
int box_y,
int scrollamt,
int choice,
int item_no,
int list_height)
{
dlg_draw_scrollbar(win,
(long) (scrollamt),
(long) (scrollamt),
(long) (scrollamt + choice),
(long) (item_no),
box_x + check_x,
box_x + list_width,
box_y,
box_y + list_height + 1,
menubox_attr,
menubox_border_attr);
}
/*
* Print list item. The 'selected' parameter is true if 'choice' is the
* current item. That one is colored differently from the other items.
*/
static void
print_item(WINDOW *win,
DIALOG_LISTITEM * item,
const char *states,
int choice,
int selected)
{
chtype save = dlg_get_attrs(win);
int i;
chtype attr = A_NORMAL;
const int *cols;
const int *indx;
int limit;
/* Clear 'residue' of last item */
wattrset(win, menubox_attr);
(void) wmove(win, choice, 0);
for (i = 0; i < list_width; i++)
(void) waddch(win, ' ');
(void) wmove(win, choice, check_x);
wattrset(win, selected ? check_selected_attr : check_attr);
(void) wprintw(win,
(checkflag == FLAG_CHECK) ? "[%c]" : "(%c)",
states[item->state]);
wattrset(win, menubox_attr);
(void) waddch(win, ' ');
if (strlen(item->name) != 0) {
indx = dlg_index_wchars(item->name);
wattrset(win, selected ? tag_key_selected_attr : tag_key_attr);
(void) waddnstr(win, item->name, indx[1]);
if ((int) strlen(item->name) > indx[1]) {
limit = dlg_limit_columns(item->name, (item_x - check_x - 6), 1);
if (limit > 1) {
wattrset(win, selected ? tag_selected_attr : tag_attr);
(void) waddnstr(win,
item->name + indx[1],
indx[limit] - indx[1]);
}
}
}
if (strlen(item->text) != 0) {
cols = dlg_index_columns(item->text);
limit = dlg_limit_columns(item->text, (getmaxx(win) - item_x + 1), 0);
if (limit > 0) {
(void) wmove(win, choice, item_x);
wattrset(win, selected ? item_selected_attr : item_attr);
dlg_print_text(win, item->text, cols[limit], &attr);
}
}
if (selected) {
dlg_item_help(item->help);
}
wattrset(win, save);
}
/*
* This is an alternate interface to 'checklist' which allows the application
* to read the list item states back directly without putting them in the
* output buffer. It also provides for more than two states over which the
* check/radio box can display.
*/
int
dlg_checklist(const char *title,
const char *cprompt,
int height,
int width,
int list_height,
int item_no,
DIALOG_LISTITEM * items,
const char *states,
int flag,
int *current_item)
{
/* *INDENT-OFF* */
static DLG_KEYS_BINDING binding[] = {
HELPKEY_BINDINGS,
ENTERKEY_BINDINGS,
DLG_KEYS_DATA( DLGK_FIELD_NEXT, KEY_RIGHT ),
DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ),
DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ),
DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_LEFT ),
DLG_KEYS_DATA( DLGK_ITEM_FIRST, KEY_HOME ),
DLG_KEYS_DATA( DLGK_ITEM_LAST, KEY_END ),
DLG_KEYS_DATA( DLGK_ITEM_LAST, KEY_LL ),
DLG_KEYS_DATA( DLGK_ITEM_NEXT, '+' ),
DLG_KEYS_DATA( DLGK_ITEM_NEXT, KEY_DOWN ),
DLG_KEYS_DATA( DLGK_ITEM_NEXT, CHR_NEXT ),
DLG_KEYS_DATA( DLGK_ITEM_PREV, '-' ),
DLG_KEYS_DATA( DLGK_ITEM_PREV, KEY_UP ),
DLG_KEYS_DATA( DLGK_ITEM_PREV, CHR_PREVIOUS ),
DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NPAGE ),
DLG_KEYS_DATA( DLGK_PAGE_NEXT, DLGK_MOUSE(KEY_NPAGE) ),
DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PPAGE ),
DLG_KEYS_DATA( DLGK_PAGE_PREV, DLGK_MOUSE(KEY_PPAGE) ),
END_KEYS_BINDING
};
/* *INDENT-ON* */
#ifdef KEY_RESIZE
int old_height = height;
int old_width = width;
#endif
int i, j, key2, found, x, y, cur_x, cur_y, box_x, box_y;
int key = 0, fkey;
int button = dialog_state.visit_items ? -1 : dlg_defaultno_button();
int choice = dlg_default_listitem(items);
int scrollamt = 0;
int max_choice;
int was_mouse;
int use_height;
int use_width, name_width, text_width;
int result = DLG_EXIT_UNKNOWN;
int num_states;
WINDOW *dialog, *list;
char *prompt = dlg_strclone(cprompt);
const char **buttons = dlg_ok_labels();
dlg_does_output();
dlg_tab_correct_str(prompt);
/*
* If this is a radiobutton list, ensure that no more than one item is
* selected initially. Allow none to be selected, since some users may
* wish to provide this flavor.
*/
if (flag == FLAG_RADIO) {
bool first = TRUE;
for (i = 0; i < item_no; i++) {
if (items[i].state) {
if (first) {
first = FALSE;
} else {
items[i].state = 0;
}
}
}
}
#ifdef KEY_RESIZE
retry:
#endif
use_height = list_height;
if (use_height == 0) {
use_width = dlg_calc_list_width(item_no, items) + 10;
/* calculate height without items (4) */
dlg_auto_size(title, prompt, &height, &width, MIN_HIGH, MAX(26, use_width));
dlg_calc_listh(&height, &use_height, item_no);
} else {
dlg_auto_size(title, prompt, &height, &width, MIN_HIGH + use_height, 26);
}
dlg_button_layout(buttons, &width);
dlg_print_size(height, width);
dlg_ctl_size(height, width);
/* we need at least two states */
if (states == 0 || strlen(states) < 2)
states = " *";
num_states = (int) strlen(states);
checkflag = flag;
x = dlg_box_x_ordinate(width);
y = dlg_box_y_ordinate(height);
dialog = dlg_new_window(height, width, y, x);
dlg_register_window(dialog, "checklist", binding);
dlg_register_buttons(dialog, "checklist", buttons);
dlg_mouse_setbase(x, y);
dlg_draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
dlg_draw_bottom_box(dialog);
dlg_draw_title(dialog, title);
wattrset(dialog, dialog_attr);
dlg_print_autowrap(dialog, prompt, height, width);
list_width = width - 6;
getyx(dialog, cur_y, cur_x);
box_y = cur_y + 1;
box_x = (width - list_width) / 2 - 1;
/*
* After displaying the prompt, we know how much space we really have.
* Limit the list to avoid overwriting the ok-button.
*/
if (use_height + MIN_HIGH > height - cur_y)
use_height = height - MIN_HIGH - cur_y;
if (use_height <= 0)
use_height = 1;
max_choice = MIN(use_height, item_no);
/* create new window for the list */
list = dlg_sub_window(dialog, use_height, list_width,
y + box_y + 1, x + box_x + 1);
/* draw a box around the list items */
dlg_draw_box(dialog, box_y, box_x,
use_height + 2 * MARGIN,
list_width + 2 * MARGIN,
menubox_border_attr, menubox_attr);
text_width = 0;
name_width = 0;
/* Find length of longest item to center checklist */
for (i = 0; i < item_no; i++) {
text_width = MAX(text_width, dlg_count_columns(items[i].text));
name_width = MAX(name_width, dlg_count_columns(items[i].name));
}
/* If the name+text is wider than the list is allowed, then truncate
* one or both of them. If the name is no wider than 1/4 of the list,
* leave it intact.
*/
use_width = (list_width - 6);
if (text_width + name_width > use_width) {
int need = (int) (0.25 * use_width);
if (name_width > need) {
int want = (int) (use_width * ((double) name_width) /
(text_width + name_width));
name_width = (want > need) ? want : need;
}
text_width = use_width - name_width;
}
check_x = (use_width - (text_width + name_width)) / 2;
item_x = name_width + check_x + 6;
/* ensure we are scrolled to show the current choice */
if (choice >= (max_choice + scrollamt)) {
scrollamt = choice - max_choice + 1;
choice = max_choice - 1;
}
/* Print the list */
for (i = 0; i < max_choice; i++) {
print_item(list,
&items[i + scrollamt],
states,
i, i == choice);
}
(void) wnoutrefresh(list);
/* register the new window, along with its borders */
dlg_mouse_mkbigregion(box_y + 1, box_x, use_height, list_width + 2,
KEY_MAX, 1, 1, 1 /* by lines */ );
print_arrows(dialog,
box_x, box_y,
scrollamt, max_choice, item_no, use_height);
dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
while (result == DLG_EXIT_UNKNOWN) {
if (button < 0) /* --visit-items */
wmove(dialog, box_y + choice + 1, box_x + check_x + 2);
key = dlg_mouse_wgetch(dialog, &fkey);
if (dlg_result_key(key, fkey, &result))
break;
was_mouse = (fkey && is_DLGK_MOUSE(key));
if (was_mouse)
key -= M_EVENT;
if (was_mouse && (key >= KEY_MAX)) {
getyx(dialog, cur_y, cur_x);
i = (key - KEY_MAX);
if (i < max_choice) {
/* De-highlight current item */
print_item(list,
&items[scrollamt + choice],
states,
choice, FALSE);
/* Highlight new item */
choice = (key - KEY_MAX);
print_item(list,
&items[scrollamt + choice],
states,
choice, TRUE);
(void) wnoutrefresh(list);
(void) wmove(dialog, cur_y, cur_x);
key = ' '; /* force the selected item to toggle */
} else {
beep();
continue;
}
fkey = FALSE;
} else if (was_mouse && key >= KEY_MIN) {
key = dlg_lookup_key(dialog, key, &fkey);
}
/*
* A space toggles the item status. We handle either a checklist
* (any number of items can be selected) or radio list (zero or one
* items can be selected).
*/
if (key == ' ') {
int current = scrollamt + choice;
int next = items[current].state + 1;
if (next >= num_states)
next = 0;
getyx(dialog, cur_y, cur_x);
if (flag == FLAG_CHECK) { /* checklist? */
items[current].state = next;
print_item(list,
&items[scrollamt + choice],
states,
choice, TRUE);
} else { /* radiolist */
for (i = 0; i < item_no; i++) {
if (i != current) {
items[i].state = 0;
}
}
if (items[current].state) {
items[current].state = next ? next : 1;
print_item(list,
&items[current],
states,
choice, TRUE);
} else {
items[current].state = 1;
for (i = 0; i < max_choice; i++)
print_item(list,
&items[scrollamt + i],
states,
i, i == choice);
}
}
(void) wnoutrefresh(list);
(void) wmove(dialog, cur_y, cur_x);
wrefresh(dialog);
continue; /* wait for another key press */
}
/*
* 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.
*/
found = FALSE;
if (!fkey) {
if (button < 0 || !dialog_state.visit_items) {
for (j = scrollamt + choice + 1; j < item_no; j++) {
if (dlg_match_char(dlg_last_getc(), items[j].name)) {
found = TRUE;
i = j - scrollamt;
break;
}
}
if (!found) {
for (j = 0; j <= scrollamt + choice; j++) {
if (dlg_match_char(dlg_last_getc(), items[j].name)) {
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) {
if (fkey) {
found = TRUE;
switch (key) {
case DLGK_ITEM_FIRST:
i = -scrollamt;
break;
case DLGK_ITEM_LAST:
i = item_no - 1 - scrollamt;
break;
case DLGK_PAGE_PREV:
if (choice)
i = 0;
else if (scrollamt != 0)
i = -MIN(scrollamt, max_choice);
else
continue;
break;
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 defined(NCURSES_VERSION_MAJOR) && NCURSES_VERSION_MAJOR < 5
/*
* Using wscrl to assist ncurses scrolling is not needed
* in version 5.x
*/
if (i == -1) {
if (use_height > 1) {
/* De-highlight current first item */
print_item(list,
&items[scrollamt],
states,
0, FALSE);
scrollok(list, TRUE);
wscrl(list, -1);
scrollok(list, FALSE);
}
scrollamt--;
print_item(list,
&items[scrollamt],
states,
0, TRUE);
} else if (i == max_choice) {
if (use_height > 1) {
/* De-highlight current last item before scrolling up */
print_item(list,
&items[scrollamt + max_choice - 1],
states,
max_choice - 1, FALSE);
scrollok(list, TRUE);
wscrl(list, 1);
scrollok(list, FALSE);
}
scrollamt++;
print_item(list,
&items[scrollamt + max_choice - 1],
states,
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(list,
&items[scrollamt + i],
states,
i, i == choice);
}
}
(void) wnoutrefresh(list);
print_arrows(dialog,
box_x, box_y,
scrollamt, max_choice, item_no, use_height);
} else {
/* De-highlight current item */
print_item(list,
&items[scrollamt + choice],
states,
choice, FALSE);
/* Highlight new item */
choice = i;
print_item(list,
&items[scrollamt + choice],
states,
choice, TRUE);
(void) wnoutrefresh(list);
print_arrows(dialog,
box_x, box_y,
scrollamt, max_choice, item_no, use_height);
(void) wmove(dialog, cur_y, cur_x);
wrefresh(dialog);
}
}
continue; /* wait for another key press */
}
if (fkey) {
switch (key) {
case DLGK_ENTER:
result = dlg_enter_buttoncode(button);
break;
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;
#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:
if (was_mouse) {
if ((key2 = dlg_ok_buttoncode(key)) >= 0) {
result = key2;
break;
}
beep();
}
}
} else {
beep();
}
}
dlg_del_window(dialog);
dlg_mouse_free_regions();
free(prompt);
*current_item = (scrollamt + choice);
return result;
}
/*
* Display a dialog box with a list of options that can be turned on or off
* The `flag' parameter is used to select between radiolist and checklist.
*/
int
dialog_checklist(const char *title,
const char *cprompt,
int height,
int width,
int list_height,
int item_no,
char **items,
int flag)
{
int result;
int i;
DIALOG_LISTITEM *listitems;
bool separate_output = ((flag == FLAG_CHECK)
&& (dialog_vars.separate_output));
bool show_status = FALSE;
int current = 0;
listitems = dlg_calloc(DIALOG_LISTITEM, (size_t) item_no + 1);
assert_ptr(listitems, "dialog_checklist");
for (i = 0; i < item_no; ++i) {
listitems[i].name = ItemName(i);
listitems[i].text = ItemText(i);
listitems[i].help = ((dialog_vars.item_help)
? ItemHelp(i)
: dlg_strempty());
listitems[i].state = !dlg_strcmp(ItemStatus(i), "on");
}
dlg_align_columns(&listitems[0].text, (int) sizeof(DIALOG_LISTITEM), item_no);
result = dlg_checklist(title,
cprompt,
height,
width,
list_height,
item_no,
listitems,
NULL,
flag,
¤t);
switch (result) {
case DLG_EXIT_OK: /* FALLTHRU */
case DLG_EXIT_EXTRA:
show_status = TRUE;
break;
case DLG_EXIT_HELP:
dlg_add_result("HELP ");
show_status = dialog_vars.help_status;
if (USE_ITEM_HELP(listitems[current].help)) {
if (show_status) {
if (separate_output) {
dlg_add_string(listitems[current].help);
dlg_add_separator();
} else {
dlg_add_quoted(listitems[current].help);
}
} else {
dlg_add_string(listitems[current].help);
}
result = DLG_EXIT_ITEM_HELP;
} else {
if (show_status) {
if (separate_output) {
dlg_add_string(listitems[current].name);
dlg_add_separator();
} else {
dlg_add_quoted(listitems[current].name);
}
} else {
dlg_add_string(listitems[current].name);
}
}
break;
}
if (show_status) {
for (i = 0; i < item_no; i++) {
if (listitems[i].state) {
if (separate_output) {
dlg_add_string(listitems[i].name);
dlg_add_separator();
} else {
if (dlg_need_separator())
dlg_add_separator();
dlg_add_string(listitems[i].name);
}
}
}
}
dlg_free_columns(&listitems[0].text, (int) sizeof(DIALOG_LISTITEM), item_no);
free(listitems);
return result;
}