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freebsd-nq/menubox.c
Nathan Whitehorn d9bc2c28cd Update dialog to 20110302 version.
2011-04-17 17:00:55 +00:00

819 lines
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/*
* $Id: menubox.c,v 1.120 2011/01/19 00:27:53 tom Exp $
*
* menubox.c -- implements the menu 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 Licens, version 2.1e
* 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)
*/
#include <dialog.h>
#include <dlg_keys.h>
static int menu_width, tag_x, item_x;
typedef enum {
Unselected = 0,
Selected,
Editing
} Mode;
#define MIN_HIGH (1 + (5 * MARGIN))
#define INPUT_ROWS 3 /* rows per inputmenu entry */
#define LLEN(n) ((n) * MENUBOX_TAGS)
#define ItemName(i) items[LLEN(i)]
#define ItemText(i) items[LLEN(i) + 1]
#define ItemHelp(i) items[LLEN(i) + 2]
#define RowHeight(i) (is_inputmenu ? ((i) * INPUT_ROWS) : ((i) * 1))
#define ItemToRow(i) (is_inputmenu ? ((i) * INPUT_ROWS + 1) : (i))
#define RowToItem(i) (is_inputmenu ? ((i) / INPUT_ROWS + 0) : (i))
static void
print_arrows(WINDOW *win,
int box_x,
int box_y,
int scrollamt,
int max_choice,
int item_no,
int menu_height)
{
dlg_draw_scrollbar(win,
scrollamt,
scrollamt,
scrollamt + max_choice,
item_no,
box_x,
box_x + menu_width,
box_y,
box_y + menu_height + 1,
menubox_attr,
menubox_border_attr);
}
/*
* Print the tag of a menu-item
*/
static void
print_tag(WINDOW *win,
DIALOG_LISTITEM * item,
int choice,
Mode selected,
bool is_inputmenu)
{
int my_x = item_x;
int my_y = ItemToRow(choice);
int tag_width = (my_x - tag_x - GUTTER);
const int *cols;
const int *indx;
int limit;
int prefix;
cols = dlg_index_columns(item->name);
indx = dlg_index_wchars(item->name);
limit = dlg_count_wchars(item->name);
prefix = (indx[1] - indx[0]);
/* highlight first char of the tag to be special */
(void) wmove(win, my_y, tag_x);
wattrset(win, selected ? tag_key_selected_attr : tag_key_attr);
if (strlen(item->name) != 0)
(void) waddnstr(win, item->name, prefix);
/* print rest of the string */
wattrset(win, selected ? tag_selected_attr : tag_attr);
if ((int) strlen(item->name) > prefix) {
limit = dlg_limit_columns(item->name, tag_width, 1);
if (limit > 0)
(void) waddnstr(win, item->name + indx[1], indx[limit] - indx[1]);
}
}
/*
* Print menu item
*/
static void
print_item(WINDOW *win,
DIALOG_LISTITEM * items,
int choice,
Mode selected,
bool is_inputmenu)
{
chtype save = dlg_get_attrs(win);
int n;
int my_width = menu_width;
int my_x = item_x;
int my_y = ItemToRow(choice);
chtype attr = A_NORMAL;
chtype textchar;
chtype bordchar;
switch (selected) {
default:
case Unselected:
textchar = item_attr;
bordchar = item_attr;
break;
case Selected:
textchar = item_selected_attr;
bordchar = item_selected_attr;
break;
case Editing:
textchar = inputbox_attr;
bordchar = dialog_attr;
break;
}
/* Clear 'residue' of last item and mark current current item */
if (is_inputmenu) {
wattrset(win, (selected != Unselected) ? item_selected_attr : item_attr);
for (n = my_y - 1; n < my_y + INPUT_ROWS - 1; n++) {
wmove(win, n, 0);
wprintw(win, "%*s", my_width, " ");
}
} else {
wattrset(win, menubox_attr);
wmove(win, my_y, 0);
wprintw(win, "%*s", my_width, " ");
}
print_tag(win, items, choice, selected, is_inputmenu);
/* Draw the input field box (only for inputmenu) */
(void) wmove(win, my_y, my_x);
if (is_inputmenu) {
my_width -= 1;
dlg_draw_box(win, my_y - 1, my_x, INPUT_ROWS, my_width - my_x - tag_x,
bordchar,
bordchar);
my_width -= 1;
++my_x;
}
/* print actual item */
wmove(win, my_y, my_x);
wattrset(win, textchar);
dlg_print_text(win, items->text, my_width - my_x, &attr);
if (selected) {
dlg_item_help(items->help);
}
wattrset(win, save);
}
/*
* Allow the user to edit the text of a menu entry.
*/
static int
input_menu_edit(WINDOW *win,
DIALOG_LISTITEM * items,
int choice,
char **resultp)
{
chtype save = dlg_get_attrs(win);
char *result;
int offset = 0;
int key = 0, fkey = 0;
int first = TRUE;
/* see above */
bool is_inputmenu = TRUE;
int y = ItemToRow(choice);
int code = TRUE;
int max_len = dlg_max_input(MAX((int) strlen(items->text) + 1, MAX_LEN));
result = dlg_malloc(char, (size_t) max_len);
assert_ptr(result, "input_menu_edit");
/* original item is used to initialize the input string. */
result[0] = '\0';
strcpy(result, items->text);
print_item(win, items, choice, Editing, TRUE);
/* taken out of inputbox.c - but somewhat modified */
for (;;) {
if (!first)
key = dlg_mouse_wgetch(win, &fkey);
if (dlg_edit_string(result, &offset, key, fkey, first)) {
dlg_show_string(win, result, offset, inputbox_attr,
y, item_x + 1, menu_width - item_x - 3,
FALSE, first);
first = FALSE;
} else if (key == ESC || key == TAB) {
code = FALSE;
break;
} else {
break;
}
}
print_item(win, items, choice, Selected, TRUE);
wattrset(win, save);
*resultp = result;
return code;
}
static int
handle_button(int code, DIALOG_LISTITEM * items, int choice)
{
switch (code) {
case DLG_EXIT_OK: /* FALLTHRU */
case DLG_EXIT_EXTRA:
dlg_add_string(items[choice].name);
break;
case DLG_EXIT_HELP:
dlg_add_result("HELP ");
if (USE_ITEM_HELP(items[choice].help)) {
dlg_add_string(items[choice].help);
code = DLG_EXIT_ITEM_HELP;
} else {
dlg_add_string(items[choice].name);
}
break;
}
return code;
}
static int
dlg_renamed_menutext(DIALOG_LISTITEM * items, int current, char *newtext)
{
if (dialog_vars.input_result)
dialog_vars.input_result[0] = '\0';
dlg_add_result("RENAMED ");
dlg_add_string(items[current].name);
dlg_add_result(" ");
dlg_add_string(newtext);
return DLG_EXIT_EXTRA;
}
static int
dlg_dummy_menutext(DIALOG_LISTITEM * items, int current, char *newtext)
{
(void) items;
(void) current;
(void) newtext;
return DLG_EXIT_ERROR;
}
/*
* This is an alternate interface to 'menu' which allows the application
* to read the list item states back directly without putting them in the
* output buffer.
*/
int
dlg_menu(const char *title,
const char *cprompt,
int height,
int width,
int menu_height,
int item_no,
DIALOG_LISTITEM * items,
int *current_item,
DIALOG_INPUTMENU rename_menutext)
{
/* *INDENT-OFF* */
static DLG_KEYS_BINDING binding[] = {
ENTERKEY_BINDINGS,
DLG_KEYS_DATA( DLGK_FIELD_NEXT, ' ' ),
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_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_FIRST, KEY_HOME ),
DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_END ),
DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_LL ),
DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NPAGE ),
DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PPAGE ),
END_KEYS_BINDING
};
static DLG_KEYS_BINDING binding2[] = {
INPUTSTR_BINDINGS,
ENTERKEY_BINDINGS,
END_KEYS_BINDING
};
/* *INDENT-ON* */
#ifdef KEY_RESIZE
int old_height = height;
int old_width = width;
#endif
int i, j, 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 result = DLG_EXIT_UNKNOWN;
int scrollamt = 0;
int max_choice, min_width;
int found;
int use_height, use_width, name_width, text_width;
WINDOW *dialog, *menu;
char *prompt = dlg_strclone(cprompt);
const char **buttons = dlg_ok_labels();
bool is_inputmenu = (rename_menutext == dlg_renamed_menutext);
dlg_does_output();
dlg_tab_correct_str(prompt);
#ifdef KEY_RESIZE
retry:
#endif
use_height = menu_height;
if (use_height == 0) {
min_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, min_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);
x = dlg_box_x_ordinate(width);
y = dlg_box_y_ordinate(height);
dialog = dlg_new_window(height, width, y, x);
dlg_register_window(dialog, "menubox", binding);
dlg_register_buttons(dialog, "menubox", 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);
menu_width = width - 6;
getyx(dialog, cur_y, cur_x);
box_y = cur_y + 1;
box_x = (width - menu_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;
/* Find out maximal number of displayable items at once. */
max_choice = MIN(use_height,
RowHeight(item_no));
if (is_inputmenu)
max_choice /= INPUT_ROWS;
/* create new window for the menu */
menu = dlg_sub_window(dialog, use_height, menu_width,
y + box_y + 1,
x + box_x + 1);
dlg_register_window(menu, "menu", binding2);
dlg_register_buttons(menu, "menu", buttons);
/* draw a box around the menu items */
dlg_draw_box(dialog, box_y, box_x, use_height + 2, menu_width + 2,
menubox_border_attr, menubox_attr);
name_width = 0;
text_width = 0;
/* Find length of longest item to center menu *
* only if --menu was given, using --inputmenu *
* won't be centered. */
for (i = 0; i < item_no; i++) {
name_width = MAX(name_width, dlg_count_columns(items[i].name));
text_width = MAX(text_width, dlg_count_columns(items[i].text));
}
/* 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 30% of the list,
* leave it intact.
*
* FIXME: the gutter width and name/list ratio should be configurable.
*/
use_width = (menu_width - GUTTER);
if (text_width + name_width > use_width) {
int need = (int) (0.30 * 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;
}
tag_x = (is_inputmenu
? 0
: (use_width - text_width - name_width) / 2);
item_x = name_width + tag_x + GUTTER;
if (choice - scrollamt >= max_choice) {
scrollamt = choice - (max_choice - 1);
choice = max_choice - 1;
}
/* Print the menu */
for (i = 0; i < max_choice; i++) {
print_item(menu,
&items[i + scrollamt],
i,
(i == choice) ? Selected : Unselected,
is_inputmenu);
}
(void) wnoutrefresh(menu);
/* register the new window, along with its borders */
dlg_mouse_mkbigregion(box_y + 1, box_x, use_height + 2, menu_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 + ItemToRow(choice) + 1, box_x + tag_x + 1);
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 (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 && 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 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(menu,
&items[scrollamt],
0, Unselected, is_inputmenu);
scrollok(menu, TRUE);
wscrl(menu, -RowHeight(1));
scrollok(menu, FALSE);
}
scrollamt--;
print_item(menu,
&items[scrollamt],
0, Selected, is_inputmenu);
} else if (i == max_choice) {
if (use_height > 1) {
/* De-highlight current last item before scrolling up */
print_item(menu,
&items[scrollamt + max_choice - 1],
max_choice - 1,
Unselected,
is_inputmenu);
scrollok(menu, TRUE);
wscrl(menu, RowHeight(1));
scrollok(menu, FALSE);
}
scrollamt++;
print_item(menu,
&items[scrollamt + max_choice - 1],
max_choice - 1, TRUE,
is_inputmenu);
} 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,
&items[scrollamt + i],
i,
(i == choice) ? Selected : Unselected,
is_inputmenu);
}
}
/* Clean bottom lines */
if (is_inputmenu) {
int spare_lines, x_count;
spare_lines = use_height % INPUT_ROWS;
wattrset(menu, menubox_attr);
for (; spare_lines; spare_lines--) {
wmove(menu, use_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, use_height);
} else {
/* De-highlight current item */
print_item(menu,
&items[scrollamt + choice],
choice,
Unselected,
is_inputmenu);
/* Highlight new item */
choice = i;
print_item(menu,
&items[scrollamt + choice],
choice,
Selected,
is_inputmenu);
(void) wnoutrefresh(menu);
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_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:
result = dlg_ok_buttoncode(button);
/*
* If dlg_menu() is called from dialog_menu(), we want to
* capture the results into dialog_vars.input_result, but not
* if dlg_menu() is called directly from an application. We
* can check this by testing if rename_menutext is the function
* pointer owned by dialog_menu(). It would be nicer to have
* this logic inside dialog_menu(), but that cannot be done
* since we would lose compatibility for the results reported
* after input_menu_edit().
*/
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(menu,
&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(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;
DIALOG_LISTITEM *listitems;
listitems = dlg_calloc(DIALOG_LISTITEM, (size_t) item_no + 1);
assert_ptr(listitems, "dialog_menu");
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());
}
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;
}
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