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lxdialog
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util.c
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// 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 propperly 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 thats * 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); }