1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2008 Nir Tzachar <nir.tzachar@gmail.com> 4 * 5 * Derived from menuconfig. 6 */ 7 #include <xalloc.h> 8 #include "nconf.h" 9 #include "lkc.h" 10 11 int attr_normal; 12 int attr_main_heading; 13 int attr_main_menu_box; 14 int attr_main_menu_fore; 15 int attr_main_menu_back; 16 int attr_main_menu_grey; 17 int attr_main_menu_heading; 18 int attr_scrollwin_text; 19 int attr_scrollwin_heading; 20 int attr_scrollwin_box; 21 int attr_dialog_text; 22 int attr_dialog_menu_fore; 23 int attr_dialog_menu_back; 24 int attr_dialog_box; 25 int attr_input_box; 26 int attr_input_heading; 27 int attr_input_text; 28 int attr_input_field; 29 int attr_function_text; 30 int attr_function_highlight; 31 32 #define COLOR_ATTR(_at, _fg, _bg, _hl) \ 33 { .attr = &(_at), .has_color = true, .color_fg = _fg, .color_bg = _bg, .highlight = _hl } 34 #define NO_COLOR_ATTR(_at, _hl) \ 35 { .attr = &(_at), .has_color = false, .highlight = _hl } 36 #define COLOR_DEFAULT -1 37 38 struct nconf_attr_param { 39 int *attr; 40 bool has_color; 41 int color_fg; 42 int color_bg; 43 int highlight; 44 }; 45 46 static const struct nconf_attr_param color_theme_params[] = { 47 COLOR_ATTR(attr_normal, COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), 48 COLOR_ATTR(attr_main_heading, COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD | A_UNDERLINE), 49 COLOR_ATTR(attr_main_menu_box, COLOR_YELLOW, COLOR_DEFAULT, A_NORMAL), 50 COLOR_ATTR(attr_main_menu_fore, COLOR_DEFAULT, COLOR_DEFAULT, A_REVERSE), 51 COLOR_ATTR(attr_main_menu_back, COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), 52 COLOR_ATTR(attr_main_menu_grey, COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), 53 COLOR_ATTR(attr_main_menu_heading, COLOR_GREEN, COLOR_DEFAULT, A_BOLD), 54 COLOR_ATTR(attr_scrollwin_text, COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), 55 COLOR_ATTR(attr_scrollwin_heading, COLOR_GREEN, COLOR_DEFAULT, A_BOLD), 56 COLOR_ATTR(attr_scrollwin_box, COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), 57 COLOR_ATTR(attr_dialog_text, COLOR_DEFAULT, COLOR_DEFAULT, A_BOLD), 58 COLOR_ATTR(attr_dialog_menu_fore, COLOR_RED, COLOR_DEFAULT, A_STANDOUT), 59 COLOR_ATTR(attr_dialog_menu_back, COLOR_YELLOW, COLOR_DEFAULT, A_NORMAL), 60 COLOR_ATTR(attr_dialog_box, COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), 61 COLOR_ATTR(attr_input_box, COLOR_YELLOW, COLOR_DEFAULT, A_NORMAL), 62 COLOR_ATTR(attr_input_heading, COLOR_GREEN, COLOR_DEFAULT, A_BOLD), 63 COLOR_ATTR(attr_input_text, COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), 64 COLOR_ATTR(attr_input_field, COLOR_DEFAULT, COLOR_DEFAULT, A_UNDERLINE), 65 COLOR_ATTR(attr_function_text, COLOR_YELLOW, COLOR_DEFAULT, A_REVERSE), 66 COLOR_ATTR(attr_function_highlight, COLOR_DEFAULT, COLOR_DEFAULT, A_BOLD), 67 { /* sentinel */ } 68 }; 69 70 static const struct nconf_attr_param no_color_theme_params[] = { 71 NO_COLOR_ATTR(attr_normal, A_NORMAL), 72 NO_COLOR_ATTR(attr_main_heading, A_BOLD | A_UNDERLINE), 73 NO_COLOR_ATTR(attr_main_menu_box, A_NORMAL), 74 NO_COLOR_ATTR(attr_main_menu_fore, A_STANDOUT), 75 NO_COLOR_ATTR(attr_main_menu_back, A_NORMAL), 76 NO_COLOR_ATTR(attr_main_menu_grey, A_NORMAL), 77 NO_COLOR_ATTR(attr_main_menu_heading, A_BOLD), 78 NO_COLOR_ATTR(attr_scrollwin_text, A_NORMAL), 79 NO_COLOR_ATTR(attr_scrollwin_heading, A_BOLD), 80 NO_COLOR_ATTR(attr_scrollwin_box, A_BOLD), 81 NO_COLOR_ATTR(attr_dialog_text, A_NORMAL), 82 NO_COLOR_ATTR(attr_dialog_menu_fore, A_STANDOUT), 83 NO_COLOR_ATTR(attr_dialog_menu_back, A_NORMAL), 84 NO_COLOR_ATTR(attr_dialog_box, A_BOLD), 85 NO_COLOR_ATTR(attr_input_box, A_BOLD), 86 NO_COLOR_ATTR(attr_input_heading, A_BOLD), 87 NO_COLOR_ATTR(attr_input_text, A_NORMAL), 88 NO_COLOR_ATTR(attr_input_field, A_UNDERLINE), 89 NO_COLOR_ATTR(attr_function_text, A_REVERSE), 90 NO_COLOR_ATTR(attr_function_highlight, A_BOLD), 91 { /* sentinel */ } 92 }; 93 94 void set_colors(void) 95 { 96 const struct nconf_attr_param *p; 97 int pair = 0; 98 99 if (has_colors()) { 100 start_color(); 101 use_default_colors(); 102 p = color_theme_params; 103 } else { 104 p = no_color_theme_params; 105 } 106 107 for (; p->attr; p++) { 108 int attr = p->highlight; 109 110 if (p->has_color) { 111 pair++; 112 init_pair(pair, p->color_fg, p->color_bg); 113 attr |= COLOR_PAIR(pair); 114 } 115 116 *p->attr = attr; 117 } 118 } 119 120 /* this changes the windows attributes !!! */ 121 void print_in_middle(WINDOW *win, int y, int width, const char *str, int attrs) 122 { 123 wattrset(win, attrs); 124 mvwprintw(win, y, (width - strlen(str)) / 2, "%s", str); 125 } 126 127 int get_line_no(const char *text) 128 { 129 int i; 130 int total = 1; 131 132 if (!text) 133 return 0; 134 135 for (i = 0; text[i] != '\0'; i++) 136 if (text[i] == '\n') 137 total++; 138 return total; 139 } 140 141 const char *get_line(const char *text, int line_no) 142 { 143 int i; 144 int lines = 0; 145 146 if (!text) 147 return NULL; 148 149 for (i = 0; text[i] != '\0' && lines < line_no; i++) 150 if (text[i] == '\n') 151 lines++; 152 return text+i; 153 } 154 155 int get_line_length(const char *line) 156 { 157 int res = 0; 158 while (*line != '\0' && *line != '\n') { 159 line++; 160 res++; 161 } 162 return res; 163 } 164 165 /* print all lines to the window. */ 166 void fill_window(WINDOW *win, const char *text) 167 { 168 int x, y; 169 int total_lines = get_line_no(text); 170 int i; 171 172 getmaxyx(win, y, x); 173 /* do not go over end of line */ 174 total_lines = min(total_lines, y); 175 for (i = 0; i < total_lines; i++) { 176 const char *line = get_line(text, i); 177 int len = min(get_line_length(line), x); 178 179 mvwprintw(win, i, 0, "%.*s", len, line); 180 } 181 } 182 183 /* get the message, and buttons. 184 * each button must be a char* 185 * return the selected button 186 * 187 * this dialog is used for 2 different things: 188 * 1) show a text box, no buttons. 189 * 2) show a dialog, with horizontal buttons 190 */ 191 int btn_dialog(WINDOW *main_window, const char *msg, int btn_num, ...) 192 { 193 va_list ap; 194 char *btn; 195 int btns_width = 0; 196 int msg_lines = 0; 197 int msg_width = 0; 198 int total_width; 199 int win_rows = 0; 200 WINDOW *win; 201 WINDOW *msg_win; 202 WINDOW *menu_win; 203 MENU *menu; 204 ITEM *btns[btn_num+1]; 205 int i, x, y; 206 int res = -1; 207 208 209 va_start(ap, btn_num); 210 for (i = 0; i < btn_num; i++) { 211 btn = va_arg(ap, char *); 212 btns[i] = new_item(btn, ""); 213 btns_width += strlen(btn)+1; 214 } 215 va_end(ap); 216 btns[btn_num] = NULL; 217 218 /* find the widest line of msg: */ 219 msg_lines = get_line_no(msg); 220 for (i = 0; i < msg_lines; i++) { 221 const char *line = get_line(msg, i); 222 int len = get_line_length(line); 223 if (msg_width < len) 224 msg_width = len; 225 } 226 227 total_width = max(msg_width, btns_width); 228 /* place dialog in middle of screen */ 229 y = (getmaxy(stdscr)-(msg_lines+4))/2; 230 x = (getmaxx(stdscr)-(total_width+4))/2; 231 232 233 /* create the windows */ 234 if (btn_num > 0) 235 win_rows = msg_lines+4; 236 else 237 win_rows = msg_lines+2; 238 239 win = newwin(win_rows, total_width+4, y, x); 240 keypad(win, TRUE); 241 menu_win = derwin(win, 1, btns_width, win_rows-2, 242 1+(total_width+2-btns_width)/2); 243 menu = new_menu(btns); 244 msg_win = derwin(win, win_rows-2, msg_width, 1, 245 1+(total_width+2-msg_width)/2); 246 247 set_menu_fore(menu, attr_dialog_menu_fore); 248 set_menu_back(menu, attr_dialog_menu_back); 249 250 wattrset(win, attr_dialog_box); 251 box(win, 0, 0); 252 253 /* print message */ 254 wattrset(msg_win, attr_dialog_text); 255 fill_window(msg_win, msg); 256 257 set_menu_win(menu, win); 258 set_menu_sub(menu, menu_win); 259 set_menu_format(menu, 1, btn_num); 260 menu_opts_off(menu, O_SHOWDESC); 261 menu_opts_off(menu, O_SHOWMATCH); 262 menu_opts_on(menu, O_ONEVALUE); 263 menu_opts_on(menu, O_NONCYCLIC); 264 set_menu_mark(menu, ""); 265 post_menu(menu); 266 267 268 touchwin(win); 269 refresh_all_windows(main_window); 270 while ((res = wgetch(win))) { 271 switch (res) { 272 case KEY_LEFT: 273 menu_driver(menu, REQ_LEFT_ITEM); 274 break; 275 case KEY_RIGHT: 276 menu_driver(menu, REQ_RIGHT_ITEM); 277 break; 278 case 9: /* TAB */ 279 if (btn_num > 1) { 280 /* cycle through buttons */ 281 if (item_index(current_item(menu)) == btn_num - 1) 282 menu_driver(menu, REQ_FIRST_ITEM); 283 else 284 menu_driver(menu, REQ_NEXT_ITEM); 285 } 286 break; 287 case 10: /* ENTER */ 288 case 27: /* ESCAPE */ 289 case ' ': 290 case KEY_F(F_BACK): 291 case KEY_F(F_EXIT): 292 break; 293 } 294 touchwin(win); 295 refresh_all_windows(main_window); 296 297 if (res == 10 || res == ' ') { 298 res = item_index(current_item(menu)); 299 break; 300 } else if (res == 27 || res == KEY_F(F_BACK) || 301 res == KEY_F(F_EXIT)) { 302 res = KEY_EXIT; 303 break; 304 } 305 } 306 307 unpost_menu(menu); 308 free_menu(menu); 309 for (i = 0; i < btn_num; i++) 310 free_item(btns[i]); 311 312 delwin(win); 313 return res; 314 } 315 316 int dialog_inputbox(WINDOW *main_window, 317 const char *title, const char *prompt, 318 const char *init, char **resultp, int *result_len) 319 { 320 int prompt_lines = 0; 321 int prompt_width = 0; 322 WINDOW *win; 323 WINDOW *prompt_win; 324 WINDOW *form_win; 325 PANEL *panel; 326 int i, x, y, lines, columns, win_lines, win_cols; 327 int res = -1; 328 int cursor_position = strlen(init); 329 int cursor_form_win; 330 char *result = *resultp; 331 332 getmaxyx(stdscr, lines, columns); 333 334 if (strlen(init)+1 > *result_len) { 335 *result_len = strlen(init)+1; 336 *resultp = result = xrealloc(result, *result_len); 337 } 338 339 /* find the widest line of msg: */ 340 prompt_lines = get_line_no(prompt); 341 for (i = 0; i < prompt_lines; i++) { 342 const char *line = get_line(prompt, i); 343 int len = get_line_length(line); 344 prompt_width = max(prompt_width, len); 345 } 346 347 if (title) 348 prompt_width = max(prompt_width, strlen(title)); 349 350 win_lines = min(prompt_lines+6, lines-2); 351 win_cols = min(prompt_width+7, columns-2); 352 prompt_lines = max(win_lines-6, 0); 353 prompt_width = max(win_cols-7, 0); 354 355 /* place dialog in middle of screen */ 356 y = (lines-win_lines)/2; 357 x = (columns-win_cols)/2; 358 359 strncpy(result, init, *result_len); 360 result[*result_len - 1] = '\0'; 361 362 /* create the windows */ 363 win = newwin(win_lines, win_cols, y, x); 364 prompt_win = derwin(win, prompt_lines+1, prompt_width, 2, 2); 365 form_win = derwin(win, 1, prompt_width, prompt_lines+3, 2); 366 keypad(form_win, TRUE); 367 368 wattrset(form_win, attr_input_field); 369 370 wattrset(win, attr_input_box); 371 box(win, 0, 0); 372 wattrset(win, attr_input_heading); 373 if (title) 374 mvwprintw(win, 0, 3, "%s", title); 375 376 /* print message */ 377 wattrset(prompt_win, attr_input_text); 378 fill_window(prompt_win, prompt); 379 380 mvwprintw(form_win, 0, 0, "%*s", prompt_width, " "); 381 cursor_form_win = min(cursor_position, prompt_width-1); 382 mvwprintw(form_win, 0, 0, "%s", 383 result + cursor_position-cursor_form_win); 384 385 /* create panels */ 386 panel = new_panel(win); 387 388 /* show the cursor */ 389 curs_set(1); 390 391 touchwin(win); 392 refresh_all_windows(main_window); 393 while ((res = wgetch(form_win))) { 394 int len = strlen(result); 395 switch (res) { 396 case 10: /* ENTER */ 397 case 27: /* ESCAPE */ 398 case KEY_F(F_HELP): 399 case KEY_F(F_EXIT): 400 case KEY_F(F_BACK): 401 break; 402 case 8: /* ^H */ 403 case 127: /* ^? */ 404 case KEY_BACKSPACE: 405 if (cursor_position > 0) { 406 memmove(&result[cursor_position-1], 407 &result[cursor_position], 408 len-cursor_position+1); 409 cursor_position--; 410 cursor_form_win--; 411 len--; 412 } 413 break; 414 case KEY_DC: 415 if (cursor_position >= 0 && cursor_position < len) { 416 memmove(&result[cursor_position], 417 &result[cursor_position+1], 418 len-cursor_position+1); 419 len--; 420 } 421 break; 422 case KEY_UP: 423 case KEY_RIGHT: 424 if (cursor_position < len) { 425 cursor_position++; 426 cursor_form_win++; 427 } 428 break; 429 case KEY_DOWN: 430 case KEY_LEFT: 431 if (cursor_position > 0) { 432 cursor_position--; 433 cursor_form_win--; 434 } 435 break; 436 case KEY_HOME: 437 cursor_position = 0; 438 cursor_form_win = 0; 439 break; 440 case KEY_END: 441 cursor_position = len; 442 cursor_form_win = min(cursor_position, prompt_width-1); 443 break; 444 default: 445 if ((isgraph(res) || isspace(res))) { 446 /* one for new char, one for '\0' */ 447 if (len+2 > *result_len) { 448 *result_len = len+2; 449 *resultp = result = realloc(result, 450 *result_len); 451 } 452 /* insert the char at the proper position */ 453 memmove(&result[cursor_position+1], 454 &result[cursor_position], 455 len-cursor_position+1); 456 result[cursor_position] = res; 457 cursor_position++; 458 cursor_form_win++; 459 len++; 460 } else { 461 mvprintw(0, 0, "unknown key: %d\n", res); 462 } 463 break; 464 } 465 if (cursor_form_win < 0) 466 cursor_form_win = 0; 467 else if (cursor_form_win > prompt_width-1) 468 cursor_form_win = prompt_width-1; 469 470 wmove(form_win, 0, 0); 471 wclrtoeol(form_win); 472 mvwprintw(form_win, 0, 0, "%*s", prompt_width, " "); 473 mvwprintw(form_win, 0, 0, "%s", 474 result + cursor_position-cursor_form_win); 475 wmove(form_win, 0, cursor_form_win); 476 touchwin(win); 477 refresh_all_windows(main_window); 478 479 if (res == 10) { 480 res = 0; 481 break; 482 } else if (res == 27 || res == KEY_F(F_BACK) || 483 res == KEY_F(F_EXIT)) { 484 res = KEY_EXIT; 485 break; 486 } else if (res == KEY_F(F_HELP)) { 487 res = 1; 488 break; 489 } 490 } 491 492 /* hide the cursor */ 493 curs_set(0); 494 del_panel(panel); 495 delwin(prompt_win); 496 delwin(form_win); 497 delwin(win); 498 return res; 499 } 500 501 /* refresh all windows in the correct order */ 502 void refresh_all_windows(WINDOW *main_window) 503 { 504 update_panels(); 505 touchwin(main_window); 506 refresh(); 507 } 508 509 void show_scroll_win(WINDOW *main_window, 510 const char *title, 511 const char *text) 512 { 513 (void)show_scroll_win_ext(main_window, title, (char *)text, NULL, NULL, NULL, NULL); 514 } 515 516 /* layman's scrollable window... */ 517 int show_scroll_win_ext(WINDOW *main_window, const char *title, char *text, 518 int *vscroll, int *hscroll, 519 extra_key_cb_fn extra_key_cb, void *data) 520 { 521 int res; 522 int total_lines = get_line_no(text); 523 int x, y, lines, columns; 524 int start_x = 0, start_y = 0; 525 int text_lines = 0, text_cols = 0; 526 int total_cols = 0; 527 int win_cols = 0; 528 int win_lines = 0; 529 int i = 0; 530 WINDOW *win; 531 WINDOW *pad; 532 PANEL *panel; 533 bool done = false; 534 535 if (hscroll) 536 start_x = *hscroll; 537 if (vscroll) 538 start_y = *vscroll; 539 540 getmaxyx(stdscr, lines, columns); 541 542 /* find the widest line of msg: */ 543 total_lines = get_line_no(text); 544 for (i = 0; i < total_lines; i++) { 545 const char *line = get_line(text, i); 546 int len = get_line_length(line); 547 total_cols = max(total_cols, len+2); 548 } 549 550 /* create the pad */ 551 pad = newpad(total_lines+10, total_cols+10); 552 wattrset(pad, attr_scrollwin_text); 553 fill_window(pad, text); 554 555 win_lines = min(total_lines+4, lines-2); 556 win_cols = min(total_cols+2, columns-2); 557 text_lines = max(win_lines-4, 0); 558 text_cols = max(win_cols-2, 0); 559 560 /* place window in middle of screen */ 561 y = (lines-win_lines)/2; 562 x = (columns-win_cols)/2; 563 564 win = newwin(win_lines, win_cols, y, x); 565 keypad(win, TRUE); 566 /* show the help in the help window, and show the help panel */ 567 wattrset(win, attr_scrollwin_box); 568 box(win, 0, 0); 569 wattrset(win, attr_scrollwin_heading); 570 mvwprintw(win, 0, 3, " %s ", title); 571 panel = new_panel(win); 572 573 /* handle scrolling */ 574 while (!done) { 575 copywin(pad, win, start_y, start_x, 2, 2, text_lines, 576 text_cols, 0); 577 print_in_middle(win, 578 text_lines+2, 579 text_cols, 580 "<OK>", 581 attr_dialog_menu_fore); 582 wrefresh(win); 583 584 res = wgetch(win); 585 switch (res) { 586 case KEY_NPAGE: 587 case ' ': 588 case 'd': 589 start_y += text_lines-2; 590 break; 591 case KEY_PPAGE: 592 case 'u': 593 start_y -= text_lines+2; 594 break; 595 case KEY_HOME: 596 start_y = 0; 597 break; 598 case KEY_END: 599 start_y = total_lines-text_lines; 600 break; 601 case KEY_DOWN: 602 case 'j': 603 start_y++; 604 break; 605 case KEY_UP: 606 case 'k': 607 start_y--; 608 break; 609 case KEY_LEFT: 610 case 'h': 611 start_x--; 612 break; 613 case KEY_RIGHT: 614 case 'l': 615 start_x++; 616 break; 617 default: 618 if (extra_key_cb) { 619 size_t start = (get_line(text, start_y) - text); 620 size_t end = (get_line(text, start_y + text_lines) - text); 621 622 if (extra_key_cb(res, start, end, data)) { 623 done = true; 624 break; 625 } 626 } 627 } 628 if (res == 0 || res == 10 || res == 27 || res == 'q' || 629 res == KEY_F(F_HELP) || res == KEY_F(F_BACK) || 630 res == KEY_F(F_EXIT)) 631 break; 632 if (start_y < 0) 633 start_y = 0; 634 if (start_y >= total_lines-text_lines) 635 start_y = total_lines-text_lines; 636 if (start_x < 0) 637 start_x = 0; 638 if (start_x >= total_cols-text_cols) 639 start_x = total_cols-text_cols; 640 } 641 642 if (hscroll) 643 *hscroll = start_x; 644 if (vscroll) 645 *vscroll = start_y; 646 del_panel(panel); 647 delwin(win); 648 refresh_all_windows(main_window); 649 return res; 650 } 651