%PDF-
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Mini Shell
Mini Shell
// SPDX-License-Identifier: GPL-2.0+
/*
* util.c
*
* ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
* MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
*/
#include <stdarg.h>
#include "dialog.h"
/* Needed in signal handler in mconf.c */
int saved_x, saved_y;
struct dialog_info dlg;
static void set_mono_theme(void)
{
dlg.screen.atr = A_NORMAL;
dlg.shadow.atr = A_NORMAL;
dlg.dialog.atr = A_NORMAL;
dlg.title.atr = A_BOLD;
dlg.border.atr = A_NORMAL;
dlg.button_active.atr = A_REVERSE;
dlg.button_inactive.atr = A_DIM;
dlg.button_key_active.atr = A_REVERSE;
dlg.button_key_inactive.atr = A_BOLD;
dlg.button_label_active.atr = A_REVERSE;
dlg.button_label_inactive.atr = A_NORMAL;
dlg.inputbox.atr = A_NORMAL;
dlg.inputbox_border.atr = A_NORMAL;
dlg.searchbox.atr = A_NORMAL;
dlg.searchbox_title.atr = A_BOLD;
dlg.searchbox_border.atr = A_NORMAL;
dlg.position_indicator.atr = A_BOLD;
dlg.menubox.atr = A_NORMAL;
dlg.menubox_border.atr = A_NORMAL;
dlg.item.atr = A_NORMAL;
dlg.item_selected.atr = A_REVERSE;
dlg.tag.atr = A_BOLD;
dlg.tag_selected.atr = A_REVERSE;
dlg.tag_key.atr = A_BOLD;
dlg.tag_key_selected.atr = A_REVERSE;
dlg.check.atr = A_BOLD;
dlg.check_selected.atr = A_REVERSE;
dlg.uarrow.atr = A_BOLD;
dlg.darrow.atr = A_BOLD;
}
#define DLG_COLOR(dialog, f, b, h) \
do { \
dlg.dialog.fg = (f); \
dlg.dialog.bg = (b); \
dlg.dialog.hl = (h); \
} while (0)
static void set_classic_theme(void)
{
DLG_COLOR(screen, COLOR_CYAN, COLOR_BLUE, true);
DLG_COLOR(shadow, COLOR_BLACK, COLOR_BLACK, true);
DLG_COLOR(dialog, COLOR_BLACK, COLOR_WHITE, false);
DLG_COLOR(title, COLOR_YELLOW, COLOR_WHITE, true);
DLG_COLOR(border, COLOR_WHITE, COLOR_WHITE, true);
DLG_COLOR(button_active, COLOR_WHITE, COLOR_BLUE, true);
DLG_COLOR(button_inactive, COLOR_BLACK, COLOR_WHITE, false);
DLG_COLOR(button_key_active, COLOR_WHITE, COLOR_BLUE, true);
DLG_COLOR(button_key_inactive, COLOR_RED, COLOR_WHITE, false);
DLG_COLOR(button_label_active, COLOR_YELLOW, COLOR_BLUE, true);
DLG_COLOR(button_label_inactive, COLOR_BLACK, COLOR_WHITE, true);
DLG_COLOR(inputbox, COLOR_BLACK, COLOR_WHITE, false);
DLG_COLOR(inputbox_border, COLOR_BLACK, COLOR_WHITE, false);
DLG_COLOR(searchbox, COLOR_BLACK, COLOR_WHITE, false);
DLG_COLOR(searchbox_title, COLOR_YELLOW, COLOR_WHITE, true);
DLG_COLOR(searchbox_border, COLOR_WHITE, COLOR_WHITE, true);
DLG_COLOR(position_indicator, COLOR_YELLOW, COLOR_WHITE, true);
DLG_COLOR(menubox, COLOR_BLACK, COLOR_WHITE, false);
DLG_COLOR(menubox_border, COLOR_WHITE, COLOR_WHITE, true);
DLG_COLOR(item, COLOR_BLACK, COLOR_WHITE, false);
DLG_COLOR(item_selected, COLOR_WHITE, COLOR_BLUE, true);
DLG_COLOR(tag, COLOR_YELLOW, COLOR_WHITE, true);
DLG_COLOR(tag_selected, COLOR_YELLOW, COLOR_BLUE, true);
DLG_COLOR(tag_key, COLOR_YELLOW, COLOR_WHITE, true);
DLG_COLOR(tag_key_selected, COLOR_YELLOW, COLOR_BLUE, true);
DLG_COLOR(check, COLOR_BLACK, COLOR_WHITE, false);
DLG_COLOR(check_selected, COLOR_WHITE, COLOR_BLUE, true);
DLG_COLOR(uarrow, COLOR_GREEN, COLOR_WHITE, true);
DLG_COLOR(darrow, COLOR_GREEN, COLOR_WHITE, true);
}
static void set_blackbg_theme(void)
{
DLG_COLOR(screen, COLOR_RED, COLOR_BLACK, true);
DLG_COLOR(shadow, COLOR_BLACK, COLOR_BLACK, false);
DLG_COLOR(dialog, COLOR_WHITE, COLOR_BLACK, false);
DLG_COLOR(title, COLOR_RED, COLOR_BLACK, false);
DLG_COLOR(border, COLOR_BLACK, COLOR_BLACK, true);
DLG_COLOR(button_active, COLOR_YELLOW, COLOR_RED, false);
DLG_COLOR(button_inactive, COLOR_YELLOW, COLOR_BLACK, false);
DLG_COLOR(button_key_active, COLOR_YELLOW, COLOR_RED, true);
DLG_COLOR(button_key_inactive, COLOR_RED, COLOR_BLACK, false);
DLG_COLOR(button_label_active, COLOR_WHITE, COLOR_RED, false);
DLG_COLOR(button_label_inactive, COLOR_BLACK, COLOR_BLACK, true);
DLG_COLOR(inputbox, COLOR_YELLOW, COLOR_BLACK, false);
DLG_COLOR(inputbox_border, COLOR_YELLOW, COLOR_BLACK, false);
DLG_COLOR(searchbox, COLOR_YELLOW, COLOR_BLACK, false);
DLG_COLOR(searchbox_title, COLOR_YELLOW, COLOR_BLACK, true);
DLG_COLOR(searchbox_border, COLOR_BLACK, COLOR_BLACK, true);
DLG_COLOR(position_indicator, COLOR_RED, COLOR_BLACK, false);
DLG_COLOR(menubox, COLOR_YELLOW, COLOR_BLACK, false);
DLG_COLOR(menubox_border, COLOR_BLACK, COLOR_BLACK, true);
DLG_COLOR(item, COLOR_WHITE, COLOR_BLACK, false);
DLG_COLOR(item_selected, COLOR_WHITE, COLOR_RED, false);
DLG_COLOR(tag, COLOR_RED, COLOR_BLACK, false);
DLG_COLOR(tag_selected, COLOR_YELLOW, COLOR_RED, true);
DLG_COLOR(tag_key, COLOR_RED, COLOR_BLACK, false);
DLG_COLOR(tag_key_selected, COLOR_YELLOW, COLOR_RED, true);
DLG_COLOR(check, COLOR_YELLOW, COLOR_BLACK, false);
DLG_COLOR(check_selected, COLOR_YELLOW, COLOR_RED, true);
DLG_COLOR(uarrow, COLOR_RED, COLOR_BLACK, false);
DLG_COLOR(darrow, COLOR_RED, COLOR_BLACK, false);
}
static void set_bluetitle_theme(void)
{
set_classic_theme();
DLG_COLOR(title, COLOR_BLUE, COLOR_WHITE, true);
DLG_COLOR(button_key_active, COLOR_YELLOW, COLOR_BLUE, true);
DLG_COLOR(button_label_active, COLOR_WHITE, COLOR_BLUE, true);
DLG_COLOR(searchbox_title, COLOR_BLUE, COLOR_WHITE, true);
DLG_COLOR(position_indicator, COLOR_BLUE, COLOR_WHITE, true);
DLG_COLOR(tag, COLOR_BLUE, COLOR_WHITE, true);
DLG_COLOR(tag_key, COLOR_BLUE, COLOR_WHITE, true);
}
/*
* Select color theme
*/
static int set_theme(const char *theme)
{
int use_color = 1;
if (!theme)
set_bluetitle_theme();
else if (strcmp(theme, "classic") == 0)
set_classic_theme();
else if (strcmp(theme, "bluetitle") == 0)
set_bluetitle_theme();
else if (strcmp(theme, "blackbg") == 0)
set_blackbg_theme();
else if (strcmp(theme, "mono") == 0)
use_color = 0;
return use_color;
}
static void init_one_color(struct dialog_color *color)
{
static int pair = 0;
pair++;
init_pair(pair, color->fg, color->bg);
if (color->hl)
color->atr = A_BOLD | COLOR_PAIR(pair);
else
color->atr = COLOR_PAIR(pair);
}
static void init_dialog_colors(void)
{
init_one_color(&dlg.screen);
init_one_color(&dlg.shadow);
init_one_color(&dlg.dialog);
init_one_color(&dlg.title);
init_one_color(&dlg.border);
init_one_color(&dlg.button_active);
init_one_color(&dlg.button_inactive);
init_one_color(&dlg.button_key_active);
init_one_color(&dlg.button_key_inactive);
init_one_color(&dlg.button_label_active);
init_one_color(&dlg.button_label_inactive);
init_one_color(&dlg.inputbox);
init_one_color(&dlg.inputbox_border);
init_one_color(&dlg.searchbox);
init_one_color(&dlg.searchbox_title);
init_one_color(&dlg.searchbox_border);
init_one_color(&dlg.position_indicator);
init_one_color(&dlg.menubox);
init_one_color(&dlg.menubox_border);
init_one_color(&dlg.item);
init_one_color(&dlg.item_selected);
init_one_color(&dlg.tag);
init_one_color(&dlg.tag_selected);
init_one_color(&dlg.tag_key);
init_one_color(&dlg.tag_key_selected);
init_one_color(&dlg.check);
init_one_color(&dlg.check_selected);
init_one_color(&dlg.uarrow);
init_one_color(&dlg.darrow);
}
/*
* Setup for color display
*/
static void color_setup(const char *theme)
{
int use_color;
use_color = set_theme(theme);
if (use_color && has_colors()) {
start_color();
init_dialog_colors();
} else
set_mono_theme();
}
/*
* Set window to attribute 'attr'
*/
void attr_clear(WINDOW * win, int height, int width, chtype attr)
{
int i, j;
wattrset(win, attr);
for (i = 0; i < height; i++) {
wmove(win, i, 0);
for (j = 0; j < width; j++)
waddch(win, ' ');
}
touchwin(win);
}
void dialog_clear(void)
{
int lines, columns;
lines = getmaxy(stdscr);
columns = getmaxx(stdscr);
attr_clear(stdscr, lines, columns, dlg.screen.atr);
/* Display background title if it exists ... - SLH */
if (dlg.backtitle != NULL) {
int i, len = 0, skip = 0;
struct subtitle_list *pos;
wattrset(stdscr, dlg.screen.atr);
mvwaddstr(stdscr, 0, 1, (char *)dlg.backtitle);
for (pos = dlg.subtitles; pos != NULL; pos = pos->next) {
/* 3 is for the arrow and spaces */
len += strlen(pos->text) + 3;
}
wmove(stdscr, 1, 1);
if (len > columns - 2) {
const char *ellipsis = "[...] ";
waddstr(stdscr, ellipsis);
skip = len - (columns - 2 - strlen(ellipsis));
}
for (pos = dlg.subtitles; pos != NULL; pos = pos->next) {
if (skip == 0)
waddch(stdscr, ACS_RARROW);
else
skip--;
if (skip == 0)
waddch(stdscr, ' ');
else
skip--;
if (skip < strlen(pos->text)) {
waddstr(stdscr, pos->text + skip);
skip = 0;
} else
skip -= strlen(pos->text);
if (skip == 0)
waddch(stdscr, ' ');
else
skip--;
}
for (i = len + 1; i < columns - 1; i++)
waddch(stdscr, ACS_HLINE);
}
wnoutrefresh(stdscr);
}
/*
* Do some initialization for dialog
*/
int init_dialog(const char *backtitle)
{
int height, width;
initscr(); /* Init curses */
/* Get current cursor position for signal handler in mconf.c */
getyx(stdscr, saved_y, saved_x);
getmaxyx(stdscr, height, width);
if (height < WINDOW_HEIGTH_MIN || width < WINDOW_WIDTH_MIN) {
endwin();
return -ERRDISPLAYTOOSMALL;
}
dlg.backtitle = backtitle;
color_setup(getenv("MENUCONFIG_COLOR"));
keypad(stdscr, TRUE);
cbreak();
noecho();
dialog_clear();
return 0;
}
void set_dialog_backtitle(const char *backtitle)
{
dlg.backtitle = backtitle;
}
void set_dialog_subtitles(struct subtitle_list *subtitles)
{
dlg.subtitles = subtitles;
}
/*
* End using dialog functions.
*/
void end_dialog(int x, int y)
{
/* move cursor back to original position */
move(y, x);
refresh();
endwin();
}
/* Print the title of the dialog. Center the title and truncate
* tile if wider than dialog (- 2 chars).
**/
void print_title(WINDOW *dialog, const char *title, int width)
{
if (title) {
int tlen = MIN(width - 2, strlen(title));
wattrset(dialog, dlg.title.atr);
mvwaddch(dialog, 0, (width - tlen) / 2 - 1, ' ');
mvwaddnstr(dialog, 0, (width - tlen)/2, title, tlen);
waddch(dialog, ' ');
}
}
/*
* Print a string of text in a window, automatically wrap around to the
* next line if the string is too long to fit on one line. Newline
* characters '\n' are properly processed. We start on a new line
* if there is no room for at least 4 nonblanks following a double-space.
*/
void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x)
{
int newl, cur_x, cur_y;
int prompt_len, room, wlen;
char tempstr[MAX_LEN + 1], *word, *sp, *sp2, *newline_separator = 0;
strcpy(tempstr, prompt);
prompt_len = strlen(tempstr);
if (prompt_len <= width - x * 2) { /* If prompt is short */
wmove(win, y, (width - prompt_len) / 2);
waddstr(win, tempstr);
} else {
cur_x = x;
cur_y = y;
newl = 1;
word = tempstr;
while (word && *word) {
sp = strpbrk(word, "\n ");
if (sp && *sp == '\n')
newline_separator = sp;
if (sp)
*sp++ = 0;
/* Wrap to next line if either the word does not fit,
or it is the first word of a new sentence, and it is
short, and the next word does not fit. */
room = width - cur_x;
wlen = strlen(word);
if (wlen > room ||
(newl && wlen < 4 && sp
&& wlen + 1 + strlen(sp) > room
&& (!(sp2 = strpbrk(sp, "\n "))
|| wlen + 1 + (sp2 - sp) > room))) {
cur_y++;
cur_x = x;
}
wmove(win, cur_y, cur_x);
waddstr(win, word);
getyx(win, cur_y, cur_x);
/* Move to the next line if the word separator was a newline */
if (newline_separator) {
cur_y++;
cur_x = x;
newline_separator = 0;
} else
cur_x++;
if (sp && *sp == ' ') {
cur_x++; /* double space */
while (*++sp == ' ') ;
newl = 1;
} else
newl = 0;
word = sp;
}
}
}
/*
* Print a button
*/
void print_button(WINDOW * win, const char *label, int y, int x, int selected)
{
int i, temp;
wmove(win, y, x);
wattrset(win, selected ? dlg.button_active.atr
: dlg.button_inactive.atr);
waddstr(win, "<");
temp = strspn(label, " ");
label += temp;
wattrset(win, selected ? dlg.button_label_active.atr
: dlg.button_label_inactive.atr);
for (i = 0; i < temp; i++)
waddch(win, ' ');
wattrset(win, selected ? dlg.button_key_active.atr
: dlg.button_key_inactive.atr);
waddch(win, label[0]);
wattrset(win, selected ? dlg.button_label_active.atr
: dlg.button_label_inactive.atr);
waddstr(win, (char *)label + 1);
wattrset(win, selected ? dlg.button_active.atr
: dlg.button_inactive.atr);
waddstr(win, ">");
wmove(win, y, x + temp + 1);
}
/*
* Draw a rectangular box with line drawing characters
*/
void
draw_box(WINDOW * win, int y, int x, int height, int width,
chtype box, chtype border)
{
int i, j;
wattrset(win, 0);
for (i = 0; i < height; i++) {
wmove(win, y + i, x);
for (j = 0; j < width; j++)
if (!i && !j)
waddch(win, border | ACS_ULCORNER);
else if (i == height - 1 && !j)
waddch(win, border | ACS_LLCORNER);
else if (!i && j == width - 1)
waddch(win, box | ACS_URCORNER);
else if (i == height - 1 && j == width - 1)
waddch(win, box | ACS_LRCORNER);
else if (!i)
waddch(win, border | ACS_HLINE);
else if (i == height - 1)
waddch(win, box | ACS_HLINE);
else if (!j)
waddch(win, border | ACS_VLINE);
else if (j == width - 1)
waddch(win, box | ACS_VLINE);
else
waddch(win, box | ' ');
}
}
/*
* Draw shadows along the right and bottom edge to give a more 3D look
* to the boxes
*/
void draw_shadow(WINDOW * win, int y, int x, int height, int width)
{
int i;
if (has_colors()) { /* Whether terminal supports color? */
wattrset(win, dlg.shadow.atr);
wmove(win, y + height, x + 2);
for (i = 0; i < width; i++)
waddch(win, winch(win) & A_CHARTEXT);
for (i = y + 1; i < y + height + 1; i++) {
wmove(win, i, x + width);
waddch(win, winch(win) & A_CHARTEXT);
waddch(win, winch(win) & A_CHARTEXT);
}
wnoutrefresh(win);
}
}
/*
* Return the position of the first alphabetic character in a string.
*/
int first_alpha(const char *string, const char *exempt)
{
int i, in_paren = 0, c;
for (i = 0; i < strlen(string); i++) {
c = tolower(string[i]);
if (strchr("<[(", c))
++in_paren;
if (strchr(">])", c) && in_paren > 0)
--in_paren;
if ((!in_paren) && isalpha(c) && strchr(exempt, c) == 0)
return i;
}
return 0;
}
/*
* ncurses uses ESC to detect escaped char sequences. This resutl in
* a small timeout before ESC is actually delivered to the application.
* lxdialog suggest <ESC> <ESC> which is correctly translated to two
* times esc. But then we need to ignore the second esc to avoid stepping
* out one menu too much. Filter away all escaped key sequences since
* keypad(FALSE) turn off ncurses support for escape sequences - and that's
* needed to make notimeout() do as expected.
*/
int on_key_esc(WINDOW *win)
{
int key;
int key2;
int key3;
nodelay(win, TRUE);
keypad(win, FALSE);
key = wgetch(win);
key2 = wgetch(win);
do {
key3 = wgetch(win);
} while (key3 != ERR);
nodelay(win, FALSE);
keypad(win, TRUE);
if (key == KEY_ESC && key2 == ERR)
return KEY_ESC;
else if (key != ERR && key != KEY_ESC && key2 == ERR)
ungetch(key);
return -1;
}
/* redraw screen in new size */
int on_key_resize(void)
{
dialog_clear();
return KEY_RESIZE;
}
struct dialog_list *item_cur;
struct dialog_list item_nil;
struct dialog_list *item_head;
void item_reset(void)
{
struct dialog_list *p, *next;
for (p = item_head; p; p = next) {
next = p->next;
free(p);
}
item_head = NULL;
item_cur = &item_nil;
}
void item_make(const char *fmt, ...)
{
va_list ap;
struct dialog_list *p = malloc(sizeof(*p));
if (item_head)
item_cur->next = p;
else
item_head = p;
item_cur = p;
memset(p, 0, sizeof(*p));
va_start(ap, fmt);
vsnprintf(item_cur->node.str, sizeof(item_cur->node.str), fmt, ap);
va_end(ap);
}
void item_add_str(const char *fmt, ...)
{
va_list ap;
size_t avail;
avail = sizeof(item_cur->node.str) - strlen(item_cur->node.str);
va_start(ap, fmt);
vsnprintf(item_cur->node.str + strlen(item_cur->node.str),
avail, fmt, ap);
item_cur->node.str[sizeof(item_cur->node.str) - 1] = '\0';
va_end(ap);
}
void item_set_tag(char tag)
{
item_cur->node.tag = tag;
}
void item_set_data(void *ptr)
{
item_cur->node.data = ptr;
}
void item_set_selected(int val)
{
item_cur->node.selected = val;
}
int item_activate_selected(void)
{
item_foreach()
if (item_is_selected())
return 1;
return 0;
}
void *item_data(void)
{
return item_cur->node.data;
}
char item_tag(void)
{
return item_cur->node.tag;
}
int item_count(void)
{
int n = 0;
struct dialog_list *p;
for (p = item_head; p; p = p->next)
n++;
return n;
}
void item_set(int n)
{
int i = 0;
item_foreach()
if (i++ == n)
return;
}
int item_n(void)
{
int n = 0;
struct dialog_list *p;
for (p = item_head; p; p = p->next) {
if (p == item_cur)
return n;
n++;
}
return 0;
}
const char *item_str(void)
{
return item_cur->node.str;
}
int item_is_selected(void)
{
return (item_cur->node.selected != 0);
}
int item_is_tag(char tag)
{
return (item_cur->node.tag == tag);
}
Zerion Mini Shell 1.0