/* * Display a message box. Program will pause and display an "OK" button * if the parameter 'pause' is non-zero. */ int dialog_prgbox(unsigned char *title, const unsigned char *line, int height, int width, int pause, int use_shell) { int i, x, y, key = 0; WINDOW *dialog; FILE *f; const unsigned char *name; unsigned char *s, buf[MAX_LEN]; int status; if (height < 0 || width < 0) { endwin(); fprintf(stderr, "\nAutosizing is impossible in dialog_prgbox().\n"); exit(-1); } width = MAX(width,10); if (width > COLS) width = COLS; if (height > LINES) height = LINES; /* center dialog box on screen */ x = DialogX ? DialogX : (COLS - width)/2; y = DialogY ? DialogY : (LINES - height)/2; #ifdef HAVE_NCURSES if (use_shadow) draw_shadow(stdscr, y, x, height, width); #endif dialog = newwin(height, width, y, x); if (dialog == NULL) { endwin(); fprintf(stderr, "\nnewwin(%d,%d,%d,%d) failed, maybe wrong dims\n", height,width,y,x); exit(1); } keypad(dialog, TRUE); draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr); if (title != NULL) { wattrset(dialog, title_attr); wmove(dialog, 0, (width - strlen(title))/2 - 1); waddch(dialog, ' '); waddstr(dialog, title); waddch(dialog, ' '); } wattrset(dialog, dialog_attr); wmove(dialog, 1, 2); if (!use_shell) { char cmdline[MAX_LEN]; char *av[51], **ap = av, *val, *p; strcpy(cmdline, line); p = cmdline; while ((val = strsep(&p," \t")) != NULL) { if (*val != '\0') *ap++ = val; } *ap = NULL; f = raw_popen(name = av[0], av, "r"); } else f = raw_popen(name = line, NULL, "r"); status = -1; if (f == NULL) { err: sprintf(buf, "%s: %s\n", name, strerror(errno)); prr: print_autowrap(dialog, buf, height-(pause?3:1), width-2, width, 1, 2, FALSE, TRUE); wrefresh(dialog); } else { while (fgets(buf, sizeof(buf), f) != NULL) { i = strlen(buf); if (buf[i-1] == '\n') buf[i-1] = '\0'; s = buf; while ((s = strchr(s, '\t')) != NULL) *s++ = ' '; print_autowrap(dialog, buf, height-(pause?3:1), width-2, width, 1, 2, FALSE, TRUE); print_autowrap(dialog, "\n", height-(pause?3:1), width-2, width, 1, 2, FALSE, FALSE); wrefresh(dialog); } if ((status = raw_pclose(f)) == -1) goto err; if (WIFEXITED(status) && WEXITSTATUS(status) == 127) { sprintf(buf, "%s: program not found\n", name); goto prr; } } if (pause) { wattrset(dialog, border_attr); wmove(dialog, height-3, 0); waddch(dialog, ACS_LTEE); for (i = 0; i < width-2; i++) waddch(dialog, ACS_HLINE); wattrset(dialog, dialog_attr); waddch(dialog, ACS_RTEE); wmove(dialog, height-2, 1); for (i = 0; i < width-2; i++) waddch(dialog, ' '); display_helpline(dialog, height-1, width); print_button(dialog, " OK ", height-2, width/2-6, TRUE); wrefresh(dialog); while (key != ESC && key != '\n' && key != ' ' && key != '\r') key = wgetch(dialog); if (key == '\r') key = '\n'; } else { key = '\n'; wrefresh(dialog); } delwin(dialog); return (status); }
/* * Display a dialog box with a list of options that can be turned on or off */ int dialog_checklist(unsigned char *title, unsigned char *prompt, int height, int width, int list_height, int cnt, void *it, unsigned char *result) { int i, j, x, y, cur_x, cur_y, old_x, old_y, box_x, box_y, key = 0, button, choice, l, k, scroll, max_choice, item_no = 0, *status; int redraw_menu = FALSE, cursor_reset = FALSE; int rval = 0, onlist = 1, ok_space, cancel_space; char okButton, cancelButton; WINDOW *dialog, *list; unsigned char **items = NULL; dialogMenuItem *ditems; int list_width, check_x, item_x; /* Allocate space for storing item on/off status */ if ((status = alloca(sizeof(int) * abs(cnt))) == NULL) { endwin(); fprintf(stderr, "\nCan't allocate memory in dialog_checklist().\n"); exit(-1); } draw: choice = scroll = button = 0; /* Previous calling syntax, e.g. just a list of strings? */ if (cnt >= 0) { items = it; ditems = NULL; item_no = cnt; /* Initializes status */ for (i = 0; i < item_no; i++) status[i] = !strcasecmp(items[i*3 + 2], "on"); } /* It's the new specification format - fake the rest of the code out */ else { item_no = abs(cnt); ditems = it; if (!items) items = (unsigned char **)alloca((item_no * 3) * sizeof(unsigned char *)); /* Initializes status */ for (i = 0; i < item_no; i++) { status[i] = ditems[i].checked ? ditems[i].checked(&ditems[i]) : FALSE; items[i*3] = ditems[i].prompt; items[i*3 + 1] = ditems[i].title; items[i*3 + 2] = status[i] ? "on" : "off"; } } max_choice = MIN(list_height, item_no); check_x = 0; item_x = 0; /* Find length of longest item in order to center checklist */ for (i = 0; i < item_no; i++) { l = strlen(items[i*3]); for (j = 0; j < item_no; j++) { k = strlen(items[j*3 + 1]); check_x = MAX(check_x, l + k + 6); } item_x = MAX(item_x, l); } if (height < 0) height = strheight(prompt)+list_height+4+2; if (width < 0) { i = strwidth(prompt); j = ((title != NULL) ? strwidth(title) : 0); width = MAX(i,j); width = MAX(width,check_x+4)+4; } width = MAX(width,24); if (width > COLS) width = COLS; if (height > LINES) height = LINES; /* center dialog box on screen */ x = (COLS - width)/2; y = (LINES - height)/2; #ifdef HAVE_NCURSES if (use_shadow) draw_shadow(stdscr, y, x, height, width); #endif dialog = newwin(height, width, y, x); if (dialog == NULL) { endwin(); fprintf(stderr, "\nnewwin(%d,%d,%d,%d) failed, maybe wrong dims\n", height,width, y, x); return -1; } keypad(dialog, TRUE); draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr); wattrset(dialog, border_attr); wmove(dialog, height-3, 0); waddch(dialog, ACS_LTEE); for (i = 0; i < width-2; i++) waddch(dialog, ACS_HLINE); wattrset(dialog, dialog_attr); waddch(dialog, ACS_RTEE); wmove(dialog, height-2, 1); for (i = 0; i < width-2; i++) waddch(dialog, ' '); if (title != NULL) { wattrset(dialog, title_attr); wmove(dialog, 0, (width - strlen(title))/2 - 1); waddch(dialog, ' '); waddstr(dialog, title); waddch(dialog, ' '); } wattrset(dialog, dialog_attr); wmove(dialog, 1, 2); print_autowrap(dialog, prompt, height - 1, width - 2, width, 1, 2, TRUE, FALSE); list_width = width - 6; getyx(dialog, cur_y, cur_x); box_y = cur_y + 1; box_x = (width - list_width) / 2 - 1; /* create new window for the list */ list = subwin(dialog, list_height, list_width, y + box_y + 1, x + box_x + 1); if (list == NULL) { delwin(dialog); endwin(); fprintf(stderr, "\nsubwin(dialog,%d,%d,%d,%d) failed, maybe wrong dims\n", list_height, list_width, y + box_y + 1, x + box_x + 1); return -1; } keypad(list, TRUE); /* draw a box around the list items */ draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2, menubox_border_attr, menubox_attr); check_x = (list_width - check_x) / 2; item_x = check_x + item_x + 6; /* Print the list */ for (i = 0; i < max_choice; i++) print_item(list, items[i * 3], items[i * 3 + 1], status[i], i, i == choice, DREF(ditems, i), list_width, item_x, check_x); wnoutrefresh(list); print_arrows(dialog, scroll, list_height, item_no, box_x, box_y, check_x + 4, cur_x, cur_y); display_helpline(dialog, height - 1, width); x = width / 2 - 11; y = height - 2; /* Is this a fancy new style argument string where we get to override * the buttons, or an old style one where they're fixed? */ if (ditems && result) { cancelButton = toupper(ditems[CANCEL_BUTTON].prompt[0]); print_button(dialog, ditems[CANCEL_BUTTON].prompt, y, x + strlen(ditems[OK_BUTTON].prompt) + 5, ditems[CANCEL_BUTTON].checked ? ditems[CANCEL_BUTTON].checked(&ditems[CANCEL_BUTTON]) : FALSE); okButton = toupper(ditems[OK_BUTTON].prompt[0]); print_button(dialog, ditems[OK_BUTTON].prompt, y, x, ditems[OK_BUTTON].checked ? ditems[OK_BUTTON].checked(&ditems[OK_BUTTON]) : TRUE); } else { cancelButton = 'C'; print_button(dialog, "Cancel", y, x + 14, FALSE); okButton = 'O'; print_button(dialog, " OK ", y, x, TRUE); } wnoutrefresh(dialog); wmove(list, choice, check_x+1); wrefresh(list); /* * XXX Black magic voodoo that allows printing to the checklist * window. For some reason, if this "refresh" code is not in * place, printing to the window from the selected callback * prints "behind" the checklist window. There is probably a * better way to do this. */ draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2, menubox_border_attr, menubox_attr); for (i = 0; i < max_choice; i++) print_item(list, items[i * 3], items[i * 3 + 1], status[i], i, i == choice, DREF(ditems, i), list_width, item_x, check_x); print_arrows(dialog, scroll, list_height, item_no, box_x, box_y, check_x + 4, cur_x, cur_y); wmove(list, choice, check_x+1); wnoutrefresh(dialog); wrefresh(list); /* XXX Black magic XXX */ while (key != ESC) { key = wgetch(dialog); /* Shortcut to OK? */ if (toupper(key) == okButton) { if (ditems) { if (result && ditems[OK_BUTTON].fire) { int st; WINDOW *save; save = dupwin(newscr); st = ditems[OK_BUTTON].fire(&ditems[OK_BUTTON]); if (st & DITEM_RESTORE) { touchwin(save); wrefresh(save); } delwin(save); } } else if (result) { *result = '\0'; for (i = 0; i < item_no; i++) { if (status[i]) { strcat(result, items[i*3]); strcat(result, "\n"); } } } rval = 0; key = ESC; /* Lemme out! */ break; } /* Shortcut to cancel? */ if (toupper(key) == cancelButton) { if (ditems && result && ditems[CANCEL_BUTTON].fire) { int st; WINDOW *save; save = dupwin(newscr); st = ditems[CANCEL_BUTTON].fire(&ditems[CANCEL_BUTTON]); if (st & DITEM_RESTORE) { touchwin(save); wrefresh(save); wmove(dialog, cur_y, cur_x); } delwin(save); } rval = 1; key = ESC; /* I gotta go! */ break; } /* Check if key pressed matches first character of any item tag in list */ for (i = 0; i < max_choice; i++) if (key != ' ' && key < 0x100 && toupper(key) == toupper(items[(scroll+i)*3][0])) break; if (i < max_choice || (key >= '1' && key <= MIN('9', '0'+max_choice)) || KEY_IS_UP(key) || KEY_IS_DOWN(key) || ((key == ' ' || key == '\n' || key == '\r') && onlist)) { /* if moving from buttons to the list, reset and redraw buttons */ if (!onlist) { onlist = 1; button = 0; if (ditems && result) { print_button(dialog, ditems[CANCEL_BUTTON].prompt, y, x + strlen(ditems[OK_BUTTON].prompt) + 5, ditems[CANCEL_BUTTON].checked ? ditems[CANCEL_BUTTON].checked(&ditems[CANCEL_BUTTON]) : button); print_button(dialog, ditems[OK_BUTTON].prompt, y, x, ditems[OK_BUTTON].checked ? ditems[OK_BUTTON].checked(&ditems[OK_BUTTON]) : !button); } else { print_button(dialog, "Cancel", y, x + 14, button); print_button(dialog, " OK ", y, x, !button); } wmove(list, choice, check_x+1); wnoutrefresh(dialog); wrefresh(list); } if (key >= '1' && key <= MIN('9', '0'+max_choice)) i = key - '1'; else if (KEY_IS_UP(key)) { if (!choice) { if (scroll) { /* Scroll list down */ getyx(dialog, cur_y, cur_x); /* Save cursor position */ if (list_height > 1) { /* De-highlight current first item before scrolling down */ print_item(list, items[scroll * 3], items[scroll * 3 + 1], status[scroll], 0, FALSE, DREF(ditems, scroll), list_width, item_x, check_x); scrollok(list, TRUE); wscrl(list, -1); scrollok(list, FALSE); } scroll--; print_item(list, items[scroll*3], items[scroll*3 + 1], status[scroll], 0, TRUE, DREF(ditems, scroll), list_width, item_x, check_x); print_arrows(dialog, scroll, list_height, item_no, box_x, box_y, check_x + 4, cur_x, cur_y); wmove(list, choice, check_x+1); wnoutrefresh(dialog); wrefresh(list); } continue; /* wait for another key press */ } else i = choice - 1; } else if (KEY_IS_DOWN(key)) { if (choice == max_choice - 1) { if (scroll + choice < item_no - 1) { /* Scroll list up */ getyx(dialog, cur_y, cur_x); /* Save cursor position */ if (list_height > 1) { /* De-highlight current last item before scrolling up */ print_item(list, items[(scroll + max_choice - 1) * 3], items[(scroll + max_choice - 1) * 3 + 1], status[scroll + max_choice - 1], max_choice - 1, FALSE, DREF(ditems, scroll + max_choice - 1), list_width, item_x, check_x); scrollok(list, TRUE); scroll(list); scrollok(list, FALSE); } scroll++; print_item(list, items[(scroll + max_choice - 1) * 3], items[(scroll + max_choice - 1) * 3 + 1], status[scroll + max_choice - 1], max_choice - 1, TRUE, DREF(ditems, scroll + max_choice - 1), list_width, item_x, check_x); print_arrows(dialog, scroll, list_height, item_no, box_x, box_y, check_x + 4, cur_x, cur_y); wmove(list, choice, check_x+1); wnoutrefresh(dialog); wrefresh(list); } continue; /* wait for another key press */ } else i = choice + 1; } else if ((key == ' ' || key == '\n' || key == '\r') && onlist) { /* Toggle item status */ char lbra = 0, rbra = 0, mark = 0; getyx(list, old_y, old_x); /* Save cursor position */ if (ditems) { if (ditems[scroll + choice].fire) { int st; WINDOW *save; save = dupwin(newscr); st = ditems[scroll + choice].fire(&ditems[scroll + choice]); /* Call "fire" action */ if (st & DITEM_RESTORE) { touchwin(save); wrefresh(save); } delwin(save); if (st & DITEM_REDRAW) { wclear(list); for (i = 0; i < item_no; i++) status[i] = ditems[i].checked ? ditems[i].checked(&ditems[i]) : FALSE; for (i = 0; i < max_choice; i++) { print_item(list, items[(scroll + i) * 3], items[(scroll + i) * 3 + 1], status[scroll + i], i, i == choice, DREF(ditems, scroll + i), list_width, item_x, check_x); } wnoutrefresh(list); print_arrows(dialog, scroll, list_height, item_no, box_x, box_y, check_x + 4, cur_x, cur_y); wrefresh(dialog); } if (st & DITEM_LEAVE_MENU) { /* Allow a fire action to take us out of the menu */ key = ESC; rval = 0; break; } else if (st & DITEM_RECREATE) { delwin(list); delwin(dialog); dialog_clear(); goto draw; } } status[scroll + choice] = ditems[scroll + choice].checked ? ditems[scroll + choice].checked(&ditems[scroll + choice]) : FALSE; lbra = ditems[scroll + choice].lbra; rbra = ditems[scroll + choice].rbra; mark = ditems[scroll + choice].mark; } else status[scroll + choice] = !status[scroll + choice]; wmove(list, choice, check_x); wattrset(list, check_selected_attr); if (!lbra) lbra = '['; if (!rbra) rbra = ']'; if (!mark) mark = 'X'; wprintw(list, "%c%c%c", lbra, status[scroll + choice] ? mark : ' ', rbra); wmove(list, old_y, old_x); /* Restore cursor to previous position */ wrefresh(list); continue; /* wait for another key press */ } if (i != choice) { /* De-highlight current item */ getyx(dialog, cur_y, cur_x); /* Save cursor position */ print_item(list, items[(scroll + choice) * 3], items[(scroll + choice) * 3 + 1], status[scroll + choice], choice, FALSE, DREF(ditems, scroll + choice), list_width, item_x, check_x); /* Highlight new item */ choice = i; print_item(list, items[(scroll + choice) * 3], items[(scroll + choice) * 3 + 1], status[scroll + choice], choice, TRUE, DREF(ditems, scroll + choice), list_width, item_x, check_x); wmove(list, choice, check_x+1); /* Restore cursor to previous position */ wrefresh(list); } continue; /* wait for another key press */ } switch (key) { case KEY_PPAGE: /* can we go up? */ if (scroll > height - 4) scroll -= (height-4); else scroll = 0; redraw_menu = TRUE; if (!onlist) { onlist = 1; button = 0; } break; case KEY_NPAGE: /* can we go down a full page? */ if (scroll + list_height >= item_no-1 - list_height) { scroll = item_no - list_height; if (scroll < 0) scroll = 0; } else scroll += list_height; redraw_menu = TRUE; if (!onlist) { onlist = 1; button = 0; } break; case KEY_HOME: /* go to the top */ scroll = 0; choice = 0; redraw_menu = TRUE; cursor_reset = TRUE; onlist = 1; break; case KEY_END: /* Go to the bottom */ scroll = item_no - list_height; if (scroll < 0) scroll = 0; choice = max_choice - 1; redraw_menu = TRUE; cursor_reset = TRUE; onlist = 1; break; case TAB: case KEY_BTAB: /* move to next component */ if (onlist) { /* on list, next is ok button */ onlist = 0; if (ditems && result) { print_button(dialog, ditems[CANCEL_BUTTON].prompt, y, x + strlen(ditems[OK_BUTTON].prompt) + 5, ditems[CANCEL_BUTTON].checked ? ditems[CANCEL_BUTTON].checked(&ditems[CANCEL_BUTTON]) : button); print_button(dialog, ditems[OK_BUTTON].prompt, y, x, ditems[OK_BUTTON].checked ? ditems[OK_BUTTON].checked(&ditems[OK_BUTTON]) : !button); ok_space = 1; cancel_space = strlen(ditems[OK_BUTTON].prompt) + 6; } else { print_button(dialog, "Cancel", y, x + 14, button); print_button(dialog, " OK ", y, x, !button); ok_space = 3; cancel_space = 15; } if (button) wmove(dialog, y, x + cancel_space); else wmove(dialog, y, x + ok_space); wrefresh(dialog); break; } else if (button) { /* on cancel button, next is list */ button = 0; onlist = 1; redraw_menu = TRUE; break; } /* on ok button, next is cancel button, same as left/right case */ case KEY_LEFT: case KEY_RIGHT: onlist = 0; button = !button; if (ditems && result) { print_button(dialog, ditems[CANCEL_BUTTON].prompt, y, x + strlen(ditems[OK_BUTTON].prompt) + 5, ditems[CANCEL_BUTTON].checked ? ditems[CANCEL_BUTTON].checked(&ditems[CANCEL_BUTTON]) : button); print_button(dialog, ditems[OK_BUTTON].prompt, y, x, ditems[OK_BUTTON].checked ? ditems[OK_BUTTON].checked(&ditems[OK_BUTTON]) : !button); ok_space = 1; cancel_space = strlen(ditems[OK_BUTTON].prompt) + 6; } else { print_button(dialog, "Cancel", y, x + 14, button); print_button(dialog, " OK ", y, x, !button); ok_space = 3; cancel_space = 15; } if (button) wmove(dialog, y, x + cancel_space); else wmove(dialog, y, x + ok_space); wrefresh(dialog); break; case ' ': case '\n': case '\r': if (!onlist) { if (ditems) { if (result && ditems[button ? CANCEL_BUTTON : OK_BUTTON].fire) { int st; WINDOW *save = dupwin(newscr); st = ditems[button ? CANCEL_BUTTON : OK_BUTTON].fire(&ditems[button ? CANCEL_BUTTON : OK_BUTTON]); if (st & DITEM_RESTORE) { touchwin(save); wrefresh(save); } delwin(save); if (st == DITEM_FAILURE) continue; } } else if (result) { *result = '\0'; for (i = 0; i < item_no; i++) { if (status[i]) { strcat(result, items[i*3]); strcat(result, "\n"); } } } rval = button; key = ESC; /* Bail out! */ break; } /* Let me outta here! */ case ESC: rval = -1; break; /* Help! */ case KEY_F(1): case '?': display_helpfile(); break; } if (redraw_menu) { getyx(list, old_y, old_x); wclear(list); /* * Re-draw a box around the list items. It is required * if amount of list items is smaller than height of listbox. * Otherwise un-redrawn field will be filled with default * screen attributes instead of dialog attributes. */ draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2, menubox_border_attr, menubox_attr); for (i = 0; i < max_choice; i++) print_item(list, items[(scroll + i) * 3], items[(scroll + i) * 3 + 1], status[scroll + i], i, i == choice, DREF(ditems, scroll + i), list_width, item_x, check_x); print_arrows(dialog, scroll, list_height, item_no, box_x, box_y, check_x + 4, cur_x, cur_y); /* redraw buttons to fix highlighting */ if (ditems && result) { print_button(dialog, ditems[CANCEL_BUTTON].prompt, y, x + strlen(ditems[OK_BUTTON].prompt) + 5, ditems[CANCEL_BUTTON].checked ? ditems[CANCEL_BUTTON].checked(&ditems[CANCEL_BUTTON]) : button); print_button(dialog, ditems[OK_BUTTON].prompt, y, x, ditems[OK_BUTTON].checked ? ditems[OK_BUTTON].checked(&ditems[OK_BUTTON]) : !button); } else { print_button(dialog, "Cancel", y, x + 14, button); print_button(dialog, " OK ", y, x, !button); } wnoutrefresh(dialog); if (cursor_reset) { wmove(list, choice, check_x+1); cursor_reset = FALSE; } else { wmove(list, old_y, old_x); } wrefresh(list); redraw_menu = FALSE; } } delwin(list); delwin(dialog); return rval; }
/* * Display text from a file in a dialog box. */ int dialog_textbox(unsigned char *title, unsigned char *file, int height, int width) { int i, x, y, cur_x, cur_y, fpos, key = 0, dir, temp, temp1; #ifdef HAVE_NCURSES int passed_end; #endif unsigned char search_term[MAX_LEN+1], *tempptr, *found; WINDOW *dialog, *text; if (height < 0 || width < 0) { fprintf(stderr, "\nAutosizing is impossible in dialog_textbox().\n"); return(-1); } search_term[0] = '\0'; /* no search term entered yet */ /* Open input file for reading */ if ((fd = open(file, O_RDONLY)) == -1) { fprintf(stderr, "\nCan't open input file <%s>in dialog_textbox().\n", file); return(-1); } /* Get file size. Actually, 'file_size' is the real file size - 1, since it's only the last byte offset from the beginning */ if ((file_size = lseek(fd, 0, SEEK_END)) == -1) { fprintf(stderr, "\nError getting file size in dialog_textbox().\n"); return(-1); } /* Restore file pointer to beginning of file after getting file size */ if (lseek(fd, 0, SEEK_SET) == -1) { fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n"); return(-1); } /* Allocate space for read buffer */ if ((buf = malloc(BUF_SIZE+1)) == NULL) { endwin(); fprintf(stderr, "\nCan't allocate memory in dialog_textbox().\n"); exit(-1); } if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) { fprintf(stderr, "\nError reading file in dialog_textbox().\n"); return(-1); } buf[bytes_read] = '\0'; /* mark end of valid data */ page = buf; /* page is pointer to start of page to be displayed */ if (width > COLS) width = COLS; if (height > LINES) height = LINES; /* center dialog box on screen */ x = DialogX ? DialogX : (COLS - width)/2; y = DialogY ? DialogY : (LINES - height)/2; #ifdef HAVE_NCURSES if (use_shadow) draw_shadow(stdscr, y, x, height, width); #endif dialog = newwin(height, width, y, x); if (dialog == NULL) { endwin(); fprintf(stderr, "\nnewwin(%d,%d,%d,%d) failed, maybe wrong dims\n", height,width,y,x); exit(1); } keypad(dialog, TRUE); /* Create window for text region, used for scrolling text */ /* text = newwin(height-4, width-2, y+1, x+1); */ text = subwin(dialog, height-4, width-2, y+1, x+1); if (text == NULL) { endwin(); fprintf(stderr, "\nsubwin(dialog,%d,%d,%d,%d) failed, maybe wrong dims\n", height-4,width-2,y+1,x+1); exit(1); } keypad(text, TRUE); draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr); wattrset(dialog, border_attr); wmove(dialog, height-3, 0); waddch(dialog, ACS_LTEE); for (i = 0; i < width-2; i++) waddch(dialog, ACS_HLINE); wattrset(dialog, dialog_attr); waddch(dialog, ACS_RTEE); wmove(dialog, height-2, 1); for (i = 0; i < width-2; i++) waddch(dialog, ' '); if (title != NULL) { wattrset(dialog, title_attr); wmove(dialog, 0, (width - strlen(title))/2 - 1); waddch(dialog, ' '); waddstr(dialog, title); waddch(dialog, ' '); } display_helpline(dialog, height-1, width); print_button(dialog, " OK ", height-2, width/2-6, TRUE); wnoutrefresh(dialog); getyx(dialog, cur_y, cur_x); /* Save cursor position */ /* Print first page of text */ attr_clear(text, height-4, width-2, dialog_attr); print_page(text, height-4, width-2); print_position(dialog, height, width); wmove(dialog, cur_y, cur_x); /* Restore cursor position */ wrefresh(dialog); while ((key != ESC) && (key != '\n') && (key != '\r') && (key != ' ')) { key = wgetch(dialog); switch (key) { case 'E': /* Exit */ case 'e': delwin(dialog); free(buf); close(fd); return 0; case 'g': /* First page */ case KEY_HOME: if (!begin_reached) { begin_reached = 1; /* First page not in buffer? */ if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) { endwin(); fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n"); exit(-1); } if (fpos > bytes_read) { /* Yes, we have to read it in */ if (lseek(fd, 0, SEEK_SET) == -1) { endwin(); fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n"); exit(-1); } if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) { endwin(); fprintf(stderr, "\nError reading file in dialog_textbox().\n"); exit(-1); } buf[bytes_read] = '\0'; } page = buf; print_page(text, height-4, width-2); print_position(dialog, height, width); wmove(dialog, cur_y, cur_x); /* Restore cursor position */ wrefresh(dialog); } break; case 'G': /* Last page */ #ifdef HAVE_NCURSES case KEY_END: #endif end_reached = 1; /* Last page not in buffer? */ if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) { endwin(); fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n"); exit(-1); } if (fpos < file_size) { /* Yes, we have to read it in */ if (lseek(fd, -BUF_SIZE, SEEK_END) == -1) { endwin(); fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n"); exit(-1); } if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) { endwin(); fprintf(stderr, "\nError reading file in dialog_textbox().\n"); exit(-1); } buf[bytes_read] = '\0'; } page = buf + bytes_read; back_lines(height-4); print_page(text, height-4, width-2); print_position(dialog, height, width); wmove(dialog, cur_y, cur_x); /* Restore cursor position */ wrefresh(dialog); break; case 'K': /* Previous line */ case 'k': case '\020': /* ^P */ case KEY_UP: if (!begin_reached) { back_lines(page_length+1); #ifdef HAVE_NCURSES /* We don't call print_page() here but use scrolling to ensure faster screen update. However, 'end_reached' and 'page_length' should still be updated, and 'page' should point to start of next page. This is done by calling get_line() in the following 'for' loop. */ scrollok(text, TRUE); wscrl(text, -1); /* Scroll text region down one line */ scrollok(text, FALSE); page_length = 0; passed_end = 0; for (i = 0; i < height-4; i++) { if (!i) { print_line(text, 0, width-2); /* print first line of page */ wnoutrefresh(text); } else get_line(); /* Called to update 'end_reached' and 'page' */ if (!passed_end) page_length++; if (end_reached && !passed_end) passed_end = 1; } #else print_page(text, height-4, width-2); #endif print_position(dialog, height, width); wmove(dialog, cur_y, cur_x); /* Restore cursor position */ wrefresh(dialog); } break; case 'B': /* Previous page */ case 'b': case KEY_PPAGE: if (!begin_reached) { back_lines(page_length + height-4); print_page(text, height-4, width-2); print_position(dialog, height, width); wmove(dialog, cur_y, cur_x); /* Restore cursor position */ wrefresh(dialog); } break; case 'J': /* Next line */ case 'j': case '\016': /* ^N */ case KEY_DOWN: if (!end_reached) { begin_reached = 0; scrollok(text, TRUE); scroll(text); /* Scroll text region up one line */ scrollok(text, FALSE); print_line(text, height-5, width-2); #ifndef HAVE_NCURSES wmove(text, height-5, 0); waddch(text, ' '); wmove(text, height-5, width-3); waddch(text, ' '); #endif wnoutrefresh(text); print_position(dialog, height, width); wmove(dialog, cur_y, cur_x); /* Restore cursor position */ wrefresh(dialog); } break; case 'F': /* Next page */ case 'f': case KEY_NPAGE: if (!end_reached) { begin_reached = 0; print_page(text, height-4, width-2); print_position(dialog, height, width); wmove(dialog, cur_y, cur_x); /* Restore cursor position */ wrefresh(dialog); } break; case '0': /* Beginning of line */ case 'H': /* Scroll left */ case 'h': case KEY_LEFT: if (hscroll > 0) { if (key == '0') hscroll = 0; else hscroll--; /* Reprint current page to scroll horizontally */ back_lines(page_length); print_page(text, height-4, width-2); wmove(dialog, cur_y, cur_x); /* Restore cursor position */ wrefresh(dialog); } break; case 'L': /* Scroll right */ case 'l': case KEY_RIGHT: if (hscroll < MAX_LEN) { hscroll++; /* Reprint current page to scroll horizontally */ back_lines(page_length); print_page(text, height-4, width-2); wmove(dialog, cur_y, cur_x); /* Restore cursor position */ wrefresh(dialog); } break; case '/': /* Forward search */ case 'n': /* Repeat forward search */ case '?': /* Backward search */ case 'N': /* Repeat backward search */ /* set search direction */ dir = (key == '/' || key == 'n') ? 1 : 0; if (dir ? !end_reached : !begin_reached) { if (key == 'n' || key == 'N') { if (search_term[0] == '\0') { /* No search term yet */ fprintf(stderr, "\a"); /* beep */ break; } } else /* Get search term from user */ if (get_search_term(text, search_term, height-4, width-2) == -1) { /* ESC pressed in get_search_term(). Reprint page to clear box */ wattrset(text, dialog_attr); back_lines(page_length); print_page(text, height-4, width-2); wmove(dialog, cur_y, cur_x); /* Restore cursor position */ wrefresh(dialog); break; } /* Save variables for restoring in case search term can't be found */ tempptr = page; temp = begin_reached; temp1 = end_reached; if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) { endwin(); fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n"); exit(-1); } fpos -= bytes_read; /* update 'page' to point to next (previous) line before forward (backward) searching */ back_lines(dir ? page_length-1 : page_length+1); found = NULL; if (dir) /* Forward search */ while((found = strstr(get_line(), search_term)) == NULL) { if (end_reached) break; } else /* Backward search */ while((found = strstr(get_line(), search_term)) == NULL) { if (begin_reached) break; back_lines(2); } if (found == NULL) { /* not found */ fprintf(stderr, "\a"); /* beep */ /* Restore program state to that before searching */ if (lseek(fd, fpos, SEEK_SET) == -1) { endwin(); fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n"); exit(-1); } if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) { endwin(); fprintf(stderr, "\nError reading file in dialog_textbox().\n"); exit(-1); } buf[bytes_read] = '\0'; page = tempptr; begin_reached = temp; end_reached = temp1; /* move 'page' to point to start of current page in order to re-print current page. Note that 'page' always points to start of next page, so this is necessary */ back_lines(page_length); } else /* Search term found */ back_lines(1); /* Reprint page */ wattrset(text, dialog_attr); print_page(text, height-4, width-2); if (found != NULL) print_position(dialog, height, width); wmove(dialog, cur_y, cur_x); /* Restore cursor position */ wrefresh(dialog); } else /* no need to find */ fprintf(stderr, "\a"); /* beep */ break; case ESC: break; case KEY_F(1): display_helpfile(); break; } } delwin(dialog); free(buf); close(fd); return (key == ESC ? -1 : 0); }