/* * $Id: util.c,v 1.201 2010/04/28 21:12:42 tom Exp $ * * util.c -- miscellaneous utilities for dialog * * Copyright 2000-2008,2010 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 License, version 2.1 * 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 #include #ifdef NCURSES_VERSION #if defined(HAVE_NCURSESW_TERM_H) #include #elif defined(HAVE_NCURSES_TERM_H) #include #else #include #endif #endif /* globals */ DIALOG_STATE dialog_state; DIALOG_VARS dialog_vars; #define concat(a,b) a##b #ifdef HAVE_RC_FILE #define RC_DATA(name,comment) , #name "_color", comment " color" #else #define RC_DATA(name,comment) /*nothing */ #endif #ifdef HAVE_COLOR #include #define COLOR_DATA(upr) , \ concat(DLGC_FG_,upr), \ concat(DLGC_BG_,upr), \ concat(DLGC_HL_,upr) #else #define COLOR_DATA(upr) /*nothing */ #endif #define DATA(atr,upr,lwr,cmt) { atr COLOR_DATA(upr) RC_DATA(lwr,cmt) } /* * Table of color and attribute values, default is for mono display. */ /* *INDENT-OFF* */ DIALOG_COLORS dlg_color_table[] = { DATA(A_NORMAL, SCREEN, screen, "Screen"), DATA(A_NORMAL, SHADOW, shadow, "Shadow"), DATA(A_REVERSE, DIALOG, dialog, "Dialog box"), DATA(A_REVERSE, TITLE, title, "Dialog box title"), DATA(A_REVERSE, BORDER, border, "Dialog box border"), DATA(A_BOLD, BUTTON_ACTIVE, button_active, "Active button"), DATA(A_DIM, BUTTON_INACTIVE, button_inactive, "Inactive button"), DATA(A_UNDERLINE, BUTTON_KEY_ACTIVE, button_key_active, "Active button key"), DATA(A_UNDERLINE, BUTTON_KEY_INACTIVE, button_key_inactive, "Inactive button key"), DATA(A_NORMAL, BUTTON_LABEL_ACTIVE, button_label_active, "Active button label"), DATA(A_NORMAL, BUTTON_LABEL_INACTIVE, button_label_inactive, "Inactive button label"), DATA(A_REVERSE, INPUTBOX, inputbox, "Input box"), DATA(A_REVERSE, INPUTBOX_BORDER, inputbox_border, "Input box border"), DATA(A_REVERSE, SEARCHBOX, searchbox, "Search box"), DATA(A_REVERSE, SEARCHBOX_TITLE, searchbox_title, "Search box title"), DATA(A_REVERSE, SEARCHBOX_BORDER, searchbox_border, "Search box border"), DATA(A_REVERSE, POSITION_INDICATOR, position_indicator, "File position indicator"), DATA(A_REVERSE, MENUBOX, menubox, "Menu box"), DATA(A_REVERSE, MENUBOX_BORDER, menubox_border, "Menu box border"), DATA(A_REVERSE, ITEM, item, "Item"), DATA(A_NORMAL, ITEM_SELECTED, item_selected, "Selected item"), DATA(A_REVERSE, TAG, tag, "Tag"), DATA(A_REVERSE, TAG_SELECTED, tag_selected, "Selected tag"), DATA(A_NORMAL, TAG_KEY, tag_key, "Tag key"), DATA(A_BOLD, TAG_KEY_SELECTED, tag_key_selected, "Selected tag key"), DATA(A_REVERSE, CHECK, check, "Check box"), DATA(A_REVERSE, CHECK_SELECTED, check_selected, "Selected check box"), DATA(A_REVERSE, UARROW, uarrow, "Up arrow"), DATA(A_REVERSE, DARROW, darrow, "Down arrow"), DATA(A_NORMAL, ITEMHELP, itemhelp, "Item help-text"), DATA(A_BOLD, FORM_ACTIVE_TEXT, form_active_text, "Active form text"), DATA(A_REVERSE, FORM_TEXT, form_text, "Form text"), DATA(A_NORMAL, FORM_ITEM_READONLY, form_item_readonly, "Readonly form item") }; /* *INDENT-ON* */ /* * Display background title if it exists ... */ void dlg_put_backtitle(void) { int i; if (dialog_vars.backtitle != NULL) { chtype attr = A_NORMAL; int backwidth = dlg_count_columns(dialog_vars.backtitle); wattrset(stdscr, screen_attr); (void) wmove(stdscr, 0, 1); dlg_print_text(stdscr, dialog_vars.backtitle, COLS - 2, &attr); for (i = 0; i < COLS - backwidth; i++) (void) waddch(stdscr, ' '); (void) wmove(stdscr, 1, 1); for (i = 0; i < COLS - 2; i++) (void) waddch(stdscr, dlg_boxchar(ACS_HLINE)); } (void) wnoutrefresh(stdscr); } /* * Set window to attribute 'attr'. There are more efficient ways to do this, * but will not work on older/buggy ncurses versions. */ void dlg_attr_clear(WINDOW *win, int height, int width, chtype attr) { int i, j; wattrset(win, attr); for (i = 0; i < height; i++) { (void) wmove(win, i, 0); for (j = 0; j < width; j++) (void) waddch(win, ' '); } (void) touchwin(win); } void dlg_clear(void) { dlg_attr_clear(stdscr, LINES, COLS, screen_attr); } #define isprivate(s) ((s) != 0 && strstr(s, "\033[?") != 0) #define TTY_DEVICE "/dev/tty" /* * If $DIALOG_TTY exists, allow the program to try to open the terminal * directly when stdout is redirected. By default we require the "--stdout" * option to be given, but some scripts were written making use of the * behavior of dialog which tried opening the terminal anyway. */ static char * dialog_tty(void) { char *result = getenv("DIALOG_TTY"); if (result != 0 && atoi(result) == 0) result = 0; return result; } /* * Open the terminal directly. If one of stdin, stdout or stderr really points * to a tty, use it. Otherwise give up and open /dev/tty. */ static int open_terminal(char **result, int mode) { const char *device = TTY_DEVICE; if (!isatty(fileno(stderr)) || (device = ttyname(fileno(stderr))) == 0) { if (!isatty(fileno(stdout)) || (device = ttyname(fileno(stdout))) == 0) { if (!isatty(fileno(stdin)) || (device = ttyname(fileno(stdin))) == 0) { device = TTY_DEVICE; } } } *result = dlg_strclone(device); return open(device, mode); } /* * Do some initialization for dialog. * * 'input' is the real tty input of dialog. Usually it is stdin, but if * --input-fd option is used, it may be anything. * * 'output' is where dialog will send its result. Usually it is stderr, but * if --stdout or --output-fd is used, it may be anything. We are concerned * mainly with the case where it happens to be the same as stdout. */ void init_dialog(FILE *input, FILE *output) { int fd1, fd2; char *device = 0; dialog_state.output = output; dialog_state.tab_len = TAB_LEN; dialog_state.aspect_ratio = DEFAULT_ASPECT_RATIO; #ifdef HAVE_COLOR dialog_state.use_colors = USE_COLORS; /* use colors by default? */ dialog_state.use_shadow = USE_SHADOW; /* shadow dialog boxes by default? */ #endif #ifdef HAVE_RC_FILE if (dlg_parse_rc() == -1) /* Read the configuration file */ dlg_exiterr("init_dialog: dlg_parse_rc"); #endif /* * Some widgets (such as gauge) may read from the standard input. Pipes * only connect stdout/stdin, so there is not much choice. But reading a * pipe would get in the way of curses' normal reading stdin for getch. * * As in the --stdout (see below), reopening the terminal does not always * work properly. dialog provides a --pipe-fd option for this purpose. We * test that case first (differing fileno's for input/stdin). If the * fileno's are equal, but we're not reading from a tty, see if we can open * /dev/tty. */ dialog_state.pipe_input = stdin; if (fileno(input) != fileno(stdin)) { if ((fd1 = dup(fileno(input))) >= 0 && (fd2 = dup(fileno(stdin))) >= 0) { (void) dup2(fileno(input), fileno(stdin)); dialog_state.pipe_input = fdopen(fd2, "r"); if (fileno(stdin) != 0) /* some functions may read fd #0 */ (void) dup2(fileno(stdin), 0); } else dlg_exiterr("cannot open tty-input"); } else if (!isatty(fileno(stdin))) { if ((fd1 = open_terminal(&device, O_RDONLY)) >= 0 && (fd2 = dup(fileno(stdin))) >= 0) { dialog_state.pipe_input = fdopen(fd2, "r"); if (freopen(device, "r", stdin) == 0) dlg_exiterr("cannot open tty-input"); if (fileno(stdin) != 0) /* some functions may read fd #0 */ (void) dup2(fileno(stdin), 0); } free(device); } /* * If stdout is not a tty and dialog is called with the --stdout option, we * have to provide for a way to write to the screen. * * The curses library normally writes its output to stdout, leaving stderr * free for scripting. Scripts are simpler when stdout is redirected. The * newterm function is useful; it allows us to specify where the output * goes. Reopening the terminal is not portable since several * configurations do not allow this to work properly: * * a) some getty implementations (and possibly broken tty drivers, e.g., on * HPUX 10 and 11) cause stdin to act as if it is still in cooked mode * even though results from ioctl's state that it is successfully * altered to raw mode. Broken is the proper term. * * b) the user may not have permissions on the device, e.g., if one su's * from the login user to another non-privileged user. */ if (!isatty(fileno(stdout)) && (fileno(stdout) == fileno(output) || dialog_tty())) { if ((fd1 = open_terminal(&device, O_WRONLY)) >= 0 && (dialog_state.screen_output = fdopen(fd1, "w")) != 0) { if (newterm(NULL, dialog_state.screen_output, stdin) == 0) { dlg_exiterr("cannot initialize curses"); } free(device); } else { dlg_exiterr("cannot open tty-output"); } } else { dialog_state.screen_output = stdout; (void) initscr(); } #ifdef NCURSES_VERSION /* * Cancel xterm's alternate-screen mode. */ if (!dialog_vars.keep_tite && (dialog_state.screen_output != stdout || isatty(fileno(dialog_state.screen_output))) && key_mouse != 0 /* xterm and kindred */ && isprivate(enter_ca_mode) && isprivate(exit_ca_mode)) { /* * initscr() or newterm() already did putp(enter_ca_mode) as a side * effect of initializing the screen. It would be nice to not even * do that, but we do not really have access to the correct copy of * the terminfo description until those functions have been invoked. */ (void) putp(exit_ca_mode); (void) putp(clear_screen); /* * Prevent ncurses from switching "back" to the normal screen when * exiting from dialog. That would move the cursor to the original * location saved in xterm. Normally curses sets the cursor position * to the first line after the display, but the alternate screen * switching is done after that point. * * Cancelling the strings altogether also works around the buggy * implementation of alternate-screen in rxvt, etc., which clear * more of the display than they should. */ enter_ca_mode = 0; exit_ca_mode = 0; } #endif #ifdef HAVE_FLUSHINP (void) flushinp(); #endif (void) keypad(stdscr, TRUE); (void) cbreak(); (void) noecho(); mouse_open(); dialog_state.screen_initialized = TRUE; #ifdef HAVE_COLOR if (dialog_state.use_colors || dialog_state.use_shadow) dlg_color_setup(); /* Set up colors */ #endif /* Set screen to screen attribute */ dlg_clear(); } #ifdef HAVE_COLOR static int defined_colors = 1; /* pair-0 is reserved */ /* * Setup for color display */ void dlg_color_setup(void) { unsigned i; if (has_colors()) { /* Terminal supports color? */ (void) start_color(); #if defined(HAVE_USE_DEFAULT_COLORS) use_default_colors(); #endif #if defined(__NetBSD__) && defined(_CURSES_) #define C_ATTR(x,y) (((x) != 0 ? A_BOLD : 0) | COLOR_PAIR((y))) /* work around bug in NetBSD curses */ for (i = 0; i < sizeof(dlg_color_table) / sizeof(dlg_color_table[0]); i++) { /* Initialize color pairs */ (void) init_pair(i + 1, dlg_color_table[i].fg, dlg_color_table[i].bg); /* Setup color attributes */ dlg_color_table[i].atr = C_ATTR(dlg_color_table[i].hilite, i + 1); } defined_colors = i + 1; #else for (i = 0; i < sizeof(dlg_color_table) / sizeof(dlg_color_table[0]); i++) { /* Initialize color pairs */ chtype color = dlg_color_pair(dlg_color_table[i].fg, dlg_color_table[i].bg); /* Setup color attributes */ dlg_color_table[i].atr = ((dlg_color_table[i].hilite ? A_BOLD : 0) | color); } #endif } else { dialog_state.use_colors = FALSE; dialog_state.use_shadow = FALSE; } } int dlg_color_count(void) { return sizeof(dlg_color_table) / sizeof(dlg_color_table[0]); } /* * Reuse color pairs (they are limited), returning a COLOR_PAIR() value if we * have (or can) define a pair with the given color as foreground on the * window's defined background. */ chtype dlg_color_pair(int foreground, int background) { chtype result = 0; int pair; short fg, bg; bool found = FALSE; for (pair = 1; pair < defined_colors; ++pair) { if (pair_content((short) pair, &fg, &bg) != ERR && fg == foreground && bg == background) { result = (chtype) COLOR_PAIR(pair); found = TRUE; break; } } if (!found && (defined_colors + 1) < COLOR_PAIRS) { pair = defined_colors++; (void) init_pair((short) pair, (short) foreground, (short) background); result = (chtype) COLOR_PAIR(pair); } return result; } /* * Reuse color pairs (they are limited), returning a COLOR_PAIR() value if we * have (or can) define a pair with the given color as foreground on the * window's defined background. */ static chtype define_color(WINDOW *win, int foreground) { chtype attrs = getattrs(win); int pair; short fg, bg, background; if ((pair = PAIR_NUMBER(attrs)) != 0 && pair_content((short) pair, &fg, &bg) != ERR) { background = bg; } else { background = COLOR_BLACK; } return dlg_color_pair(foreground, background); } #endif /* * End using dialog functions. */ void end_dialog(void) { if (dialog_state.screen_initialized) { dialog_state.screen_initialized = FALSE; mouse_close(); (void) endwin(); (void) fflush(stdout); } } #define isOurEscape(p) (((p)[0] == '\\') && ((p)[1] == 'Z') && ((p)[2] != 0)) static int centered(int width, const char *string) { int len = dlg_count_columns(string); int left; int hide = 0; int n; if (dialog_vars.colors) { for (n = 0; n < len; ++n) { if (isOurEscape(string + n)) { hide += 3; } } } left = (width - (len - hide)) / 2 - 1; if (left < 0) left = 0; return left; } /* * Print up to 'cols' columns from 'text', optionally rendering our escape * sequence for attributes and color. */ void dlg_print_text(WINDOW *win, const char *txt, int cols, chtype *attr) { int y_origin, x_origin; int y_before, x_before = 0; int y_after, x_after; int tabbed = 0; bool thisTab; bool ended = FALSE; chtype useattr; getyx(win, y_origin, x_origin); while (cols > 0 && (*txt != '\0')) { if (dialog_vars.colors) { while (isOurEscape(txt)) { int code; txt += 2; switch (code = CharOf(*txt)) { #ifdef HAVE_COLOR case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': *attr &= ~A_COLOR; *attr |= define_color(win, code - '0'); break; #endif case 'B': *attr &= ~A_BOLD; break; case 'b': *attr |= A_BOLD; break; case 'R': *attr &= ~A_REVERSE; break; case 'r': *attr |= A_REVERSE; break; case 'U': *attr &= ~A_UNDERLINE; break; case 'u': *attr |= A_UNDERLINE; break; case 'n': *attr = A_NORMAL; break; } ++txt; } } if (ended || *txt == '\n' || *txt == '\0') break; useattr = (*attr) & A_ATTRIBUTES; #ifdef HAVE_COLOR /* * Prevent this from making text invisible when the foreground and * background colors happen to be the same, and there's no bold * attribute. */ if ((useattr & A_COLOR) != 0 && (useattr & A_BOLD) == 0) { short pair = (short) PAIR_NUMBER(useattr); short fg, bg; if (pair_content(pair, &fg, &bg) != ERR && fg == bg) { useattr &= ~A_COLOR; useattr |= dlg_color_pair(fg, ((bg == COLOR_BLACK) ? COLOR_WHITE : COLOR_BLACK)); } } #endif /* * Write the character, using curses to tell exactly how wide it * is. If it is a tab, discount that, since the caller thinks * tabs are nonprinting, and curses will expand tabs to one or * more blanks. */ thisTab = (CharOf(*txt) == TAB); if (thisTab) getyx(win, y_before, x_before); (void) waddch(win, CharOf(*txt++) | useattr); getyx(win, y_after, x_after); if (thisTab && (y_after == y_origin)) tabbed += (x_after - x_before); if (y_after != y_origin || x_after >= cols + tabbed + x_origin) { ended = TRUE; } } } /* * Print one line of the prompt in the window within the limits of the * specified right margin. The line will end on a word boundary and a pointer * to the start of the next line is returned, or a NULL pointer if the end of * *prompt is reached. */ const char * dlg_print_line(WINDOW *win, chtype *attr, const char *prompt, int lm, int rm, int *x) { const char *wrap_ptr = prompt; const char *test_ptr = prompt; const int *cols = dlg_index_columns(prompt); const int *indx = dlg_index_wchars(prompt); int wrap_inx = 0; int test_inx = 0; int cur_x = lm; int hidden = 0; int limit = dlg_count_wchars(prompt); int n; int tabbed = 0; *x = 1; /* * Set *test_ptr to the end of the line or the right margin (rm), whichever * is less, and set wrap_ptr to the end of the last word in the line. */ for (n = 0; n < limit; ++n) { test_ptr = prompt + indx[test_inx]; if (*test_ptr == '\n' || *test_ptr == '\0' || cur_x >= (rm + hidden)) break; if (*test_ptr == TAB && n == 0) { tabbed = 8; /* workaround for leading tabs */ } else if (*test_ptr == ' ' && n != 0 && prompt[indx[n - 1]] != ' ') { wrap_inx = n; *x = cur_x; } else if (isOurEscape(test_ptr)) { hidden += 3; n += 2; } cur_x = lm + tabbed + cols[n + 1]; if (cur_x > (rm + hidden)) break; test_inx = n + 1; } /* * If the line doesn't reach the right margin in the middle of a word, then * we don't have to wrap it at the end of the previous word. */ test_ptr = prompt + indx[test_inx]; if (*test_ptr == '\n' || *test_ptr == ' ' || *test_ptr == '\0') { wrap_inx = test_inx; while (wrap_inx > 0 && prompt[indx[wrap_inx - 1]] == ' ') { wrap_inx--; } *x = lm + indx[wrap_inx]; } else if (*x == 1 && cur_x >= rm) { /* * If the line has no spaces, then wrap it anyway at the right margin */ *x = rm; wrap_inx = test_inx; } wrap_ptr = prompt + indx[wrap_inx]; /* * Print the line if we have a window pointer. Otherwise this routine * is just being called for sizing the window. */ if (win) { dlg_print_text(win, prompt, (cols[wrap_inx] - hidden), attr); } /* *x tells the calling function how long the line was */ if (*x == 1) *x = rm; /* Find the start of the next line and return a pointer to it */ test_ptr = wrap_ptr; while (*test_ptr == ' ') test_ptr++; if (*test_ptr == '\n') test_ptr++; return (test_ptr); } static void justify_text(WINDOW *win, const char *prompt, int limit_y, int limit_x, int *high, int *wide) { chtype attr = A_NORMAL; int x = (2 * MARGIN); int y = MARGIN; int max_x = 2; int lm = (2 * MARGIN); /* left margin (box-border plus a space) */ int rm = limit_x; /* right margin */ int bm = limit_y; /* bottom margin */ int last_y = 0, last_x = 0; if (win) { rm -= (2 * MARGIN); bm -= (2 * MARGIN); } if (prompt == 0) prompt = ""; if (win != 0) getyx(win, last_y, last_x); while (y <= bm && *prompt) { x = lm; if (*prompt == '\n') { while (*prompt == '\n' && y < bm) { if (*(prompt + 1) != '\0') { ++y; if (win != 0) (void) wmove(win, y, lm); } prompt++; } } else if (win != 0) (void) wmove(win, y, lm); if (*prompt) { prompt = dlg_print_line(win, &attr, prompt, lm, rm, &x); if (win != 0) getyx(win, last_y, last_x); } if (*prompt) { ++y; if (win != 0) (void) wmove(win, y, lm); } max_x = MAX(max_x, x); } /* Move back to the last position after drawing prompt, for msgbox. */ if (win != 0) (void) wmove(win, last_y, last_x); /* Set the final height and width for the calling function */ if (high != 0) *high = y; if (wide != 0) *wide = max_x; } /* * 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. Note that the string may * contain embedded newlines. */ void dlg_print_autowrap(WINDOW *win, const char *prompt, int height, int width) { justify_text(win, prompt, height, width, (int *) 0, (int *) 0); } /* * Display the message in a scrollable window. Actually the way it works is * that we create a "tall" window of the proper width, let the text wrap within * that, and copy a slice of the result to the dialog. * * It works for ncurses. Other curses implementations show only blanks (Tru64) * or garbage (NetBSD). */ int dlg_print_scrolled(WINDOW *win, const char *prompt, int offset, int height, int width, int pauseopt) { int oldy, oldx; int last = 0; getyx(win, oldy, oldx); #ifdef NCURSES_VERSION if (pauseopt) { int wide = width - (2 * MARGIN); int high = LINES; int y, x; int len; int percent; WINDOW *dummy; char buffer[5]; #if defined(NCURSES_VERSION_PATCH) && NCURSES_VERSION_PATCH >= 20040417 /* * If we're not limited by the screensize, allow text to possibly be * one character per line. */ if ((len = dlg_count_columns(prompt)) > high) high = len; #endif dummy = newwin(high, width, 0, 0); wbkgdset(dummy, dialog_attr | ' '); wattrset(dummy, dialog_attr); werase(dummy); dlg_print_autowrap(dummy, prompt, high, width); getyx(dummy, y, x); copywin(dummy, /* srcwin */ win, /* dstwin */ offset + MARGIN, /* sminrow */ MARGIN, /* smincol */ MARGIN, /* dminrow */ MARGIN, /* dmincol */ height, /* dmaxrow */ wide, /* dmaxcol */ FALSE); delwin(dummy); /* if the text is incomplete, or we have scrolled, show the percentage */ if (y > 0 && wide > 4) { percent = (int) ((height + offset) * 100.0 / y); if (percent < 0) percent = 0; if (percent > 100) percent = 100; if (offset != 0 || percent != 100) { (void) wattrset(win, position_indicator_attr); (void) wmove(win, MARGIN + height, wide - 4); (void) sprintf(buffer, "%d%%", percent); (void) waddstr(win, buffer); if ((len = (int) strlen(buffer)) < 4) { wattrset(win, border_attr); whline(win, dlg_boxchar(ACS_HLINE), 4 - len); } } } last = (y - height); } else #endif { (void) offset; wattrset(win, dialog_attr); dlg_print_autowrap(win, prompt, height + 1 + (3 * MARGIN), width); last = 0; } wmove(win, oldy, oldx); return last; } int dlg_check_scrolled(int key, int last, int page, bool * show, int *offset) { int code = 0; *show = FALSE; switch (key) { case DLGK_PAGE_FIRST: if (*offset > 0) { *offset = 0; *show = TRUE; } break; case DLGK_PAGE_LAST: if (*offset < last) { *offset = last; *show = TRUE; } break; case DLGK_GRID_UP: if (*offset > 0) { --(*offset); *show = TRUE; } break; case DLGK_GRID_DOWN: if (*offset < last) { ++(*offset); *show = TRUE; } break; case DLGK_PAGE_PREV: if (*offset > 0) { *offset -= page; if (*offset < 0) *offset = 0; *show = TRUE; } break; case DLGK_PAGE_NEXT: if (*offset < last) { *offset += page; if (*offset > last) *offset = last; *show = TRUE; } break; default: code = -1; break; } return code; } /* * Calculate the window size for preformatted text. This will calculate box * dimensions that are at or close to the specified aspect ratio for the prompt * string with all spaces and newlines preserved and additional newlines added * as necessary. */ static void auto_size_preformatted(const char *prompt, int *height, int *width) { int high = 0, wide = 0; float car; /* Calculated Aspect Ratio */ float diff; int max_y = SLINES - 1; int max_x = SCOLS - 2; int max_width = max_x; int ar = dialog_state.aspect_ratio; /* Get the initial dimensions */ justify_text((WINDOW *) 0, prompt, max_y, max_x, &high, &wide); car = (float) (wide / high); /* * If the aspect ratio is greater than it should be, then decrease the * width proportionately. */ if (car > ar) { diff = car / (float) ar; max_x = (int) ((float) wide / diff + 4); justify_text((WINDOW *) 0, prompt, max_y, max_x, &high, &wide); car = (float) wide / (float) high; } /* * If the aspect ratio is too small after decreasing the width, then * incrementally increase the width until the aspect ratio is equal to or * greater than the specified aspect ratio. */ while (car < ar && max_x < max_width) { max_x += 4; justify_text((WINDOW *) 0, prompt, max_y, max_x, &high, &wide); car = (float) (wide / high); } *height = high; *width = wide; } /* * Find the length of the longest "word" in the given string. By setting the * widget width at least this long, we can avoid splitting a word on the * margin. */ static int longest_word(const char *string) { int length, result = 0; while (*string != '\0') { length = 0; while (*string != '\0' && !isspace(UCH(*string))) { length++; string++; } result = MAX(result, length); if (*string != '\0') string++; } return result; } /* * if (height or width == -1) Maximize() * if (height or width == 0), justify and return actual limits. */ static void real_auto_size(const char *title, const char *prompt, int *height, int *width, int boxlines, int mincols) { int x = (dialog_vars.begin_set ? dialog_vars.begin_x : 2); int y = (dialog_vars.begin_set ? dialog_vars.begin_y : 1); int title_length = title ? dlg_count_columns(title) : 0; int nc = 4; int high; int wide; int save_high = *height; int save_wide = *width; if (prompt == 0) { if (*height == 0) *height = -1; if (*width == 0) *width = -1; } if (*height > 0) { high = *height; } else { high = SLINES - y; } if (*width > 0) { wide = *width; } else if (prompt != 0) { wide = MAX(title_length, mincols); if (strchr(prompt, '\n') == 0) { double val = dialog_state.aspect_ratio * dlg_count_columns(prompt); double xxx = sqrt(val); int tmp = (int) xxx; wide = MAX(wide, tmp); wide = MAX(wide, longest_word(prompt)); justify_text((WINDOW *) 0, prompt, high, wide, height, width); } else { auto_size_preformatted(prompt, height, width); } } else { wide = SCOLS - x; justify_text((WINDOW *) 0, prompt, high, wide, height, width); } if (*width < title_length) { justify_text((WINDOW *) 0, prompt, high, title_length, height, width); *width = title_length; } if (*width < mincols && save_wide == 0) *width = mincols; if (prompt != 0) { *width += nc; *height += boxlines + 2; } if (save_high > 0) *height = save_high; if (save_wide > 0) *width = save_wide; } /* End of real_auto_size() */ void dlg_auto_size(const char *title, const char *prompt, int *height, int *width, int boxlines, int mincols) { real_auto_size(title, prompt, height, width, boxlines, mincols); if (*width > SCOLS) { (*height)++; *width = SCOLS; } if (*height > SLINES) *height = SLINES; } /* * if (height or width == -1) Maximize() * if (height or width == 0) * height=MIN(SLINES, num.lines in fd+n); * width=MIN(SCOLS, MAX(longer line+n, mincols)); */ void dlg_auto_sizefile(const char *title, const char *file, int *height, int *width, int boxlines, int mincols) { int count = 0; int len = title ? dlg_count_columns(title) : 0; int nc = 4; int numlines = 2; long offset; int ch; FILE *fd; /* Open input file for reading */ if ((fd = fopen(file, "rb")) == NULL) dlg_exiterr("dlg_auto_sizefile: Cannot open input file %s", file); if ((*height == -1) || (*width == -1)) { *height = SLINES - (dialog_vars.begin_set ? dialog_vars.begin_y : 0); *width = SCOLS - (dialog_vars.begin_set ? dialog_vars.begin_x : 0); } if ((*height != 0) && (*width != 0)) { (void) fclose(fd); if (*width > SCOLS) *width = SCOLS; if (*height > SLINES) *height = SLINES; return; } while (!feof(fd)) { offset = 0; while (((ch = getc(fd)) != '\n') && !feof(fd)) if ((ch == TAB) && (dialog_vars.tab_correct)) offset += dialog_state.tab_len - (offset % dialog_state.tab_len); else offset++; if (offset > len) len = offset; count++; } /* now 'count' has the number of lines of fd and 'len' the max lenght */ *height = MIN(SLINES, count + numlines + boxlines); *width = MIN(SCOLS, MAX((len + nc), mincols)); /* here width and height can be maximized if > SCOLS|SLINES because textbox-like widgets don't put all on the screen. Msgbox-like widget instead have to put all correctly. */ (void) fclose(fd); } /* * Draw a rectangular box with line drawing characters. * * borderchar is used to color the upper/left edges. * * boxchar is used to color the right/lower edges. It also is fill-color used * for the box contents. * * Normally, if you are drawing a scrollable box, use menubox_border_attr for * boxchar, and menubox_attr for borderchar since the scroll-arrows are drawn * with menubox_attr at the top, and menubox_border_attr at the bottom. That * also (given the default color choices) produces a recessed effect. * * If you want a raised effect (and are not going to use the scroll-arrows), * reverse this choice. */ void dlg_draw_box(WINDOW *win, int y, int x, int height, int width, chtype boxchar, chtype borderchar) { int i, j; chtype save = getattrs(win); wattrset(win, 0); for (i = 0; i < height; i++) { (void) wmove(win, y + i, x); for (j = 0; j < width; j++) if (!i && !j) (void) waddch(win, borderchar | dlg_boxchar(ACS_ULCORNER)); else if (i == height - 1 && !j) (void) waddch(win, borderchar | dlg_boxchar(ACS_LLCORNER)); else if (!i && j == width - 1) (void) waddch(win, boxchar | dlg_boxchar(ACS_URCORNER)); else if (i == height - 1 && j == width - 1) (void) waddch(win, boxchar | dlg_boxchar(ACS_LRCORNER)); else if (!i) (void) waddch(win, borderchar | dlg_boxchar(ACS_HLINE)); else if (i == height - 1) (void) waddch(win, boxchar | dlg_boxchar(ACS_HLINE)); else if (!j) (void) waddch(win, borderchar | dlg_boxchar(ACS_VLINE)); else if (j == width - 1) (void) waddch(win, boxchar | dlg_boxchar(ACS_VLINE)); else (void) waddch(win, boxchar | ' '); } wattrset(win, save); } #ifdef HAVE_COLOR /* * Draw a shadow on the parent window corresponding to the right- and * bottom-edge of the child window, to give a 3-dimensional look. */ static void draw_childs_shadow(WINDOW *parent, WINDOW *child) { if (has_colors()) { /* Whether terminal supports color? */ chtype save = getattrs(parent); dlg_draw_shadow(parent, getbegy(child) - getbegy(parent), getbegx(child) - getbegx(parent), getmaxy(child), getmaxx(child)); wattrset(parent, save); } } /* * Draw shadows along the right and bottom edge to give a more 3D look * to the boxes */ void dlg_draw_shadow(WINDOW *win, int y, int x, int height, int width) { int i, j; if (has_colors()) { /* Whether terminal supports color? */ wattrset(win, shadow_attr); for (i = 0; i < SHADOW_ROWS; ++i) { for (j = 0; j < width; ++j) { if (wmove(win, i + y + height, j + x + SHADOW_COLS) != ERR) { (void) waddch(win, winch(win) & (chtype) (~A_COLOR)); } } } for (i = 0; i < height; i++) { for (j = 0; j < SHADOW_COLS; ++j) { if (wmove(win, i + y + SHADOW_ROWS, j + x + width) != ERR) { (void) waddch(win, winch(win) & (chtype) (~A_COLOR)); } } } (void) wnoutrefresh(win); } } #endif /* HAVE_COLOR */ /* * Allow shell scripts to remap the exit codes so they can distinguish ESC * from ERROR. */ void dlg_exit(int code) { /* *INDENT-OFF* */ static const struct { int code; const char *name; } table[] = { { DLG_EXIT_CANCEL, "DIALOG_CANCEL" }, { DLG_EXIT_ERROR, "DIALOG_ERROR" }, { DLG_EXIT_ESC, "DIALOG_ESC" }, { DLG_EXIT_EXTRA, "DIALOG_EXTRA" }, { DLG_EXIT_HELP, "DIALOG_HELP" }, { DLG_EXIT_OK, "DIALOG_OK" }, { DLG_EXIT_ITEM_HELP, "DIALOG_ITEM_HELP" }, }; /* *INDENT-ON* */ unsigned n; char *name; char *temp; long value; bool overridden = FALSE; retry: for (n = 0; n < sizeof(table) / sizeof(table[0]); n++) { if (table[n].code == code) { if ((name = getenv(table[n].name)) != 0) { value = strtol(name, &temp, 0); if (temp != 0 && temp != name && *temp == '\0') { code = value; overridden = TRUE; } } break; } } /* * Prior to 2004/12/19, a widget using --item-help would exit with "OK" * if the help button were selected. Now we want to exit with "HELP", * but allow the environment variable to override. */ if (code == DLG_EXIT_ITEM_HELP && !overridden) { code = DLG_EXIT_HELP; goto retry; } #ifdef NO_LEAKS _dlg_inputstr_leaks(); #if defined(NCURSES_VERSION) && defined(HAVE__NC_FREE_AND_EXIT) _nc_free_and_exit(code); #endif #endif if (dialog_state.input == stdin) { exit(code); } else { /* * Just in case of using --input-fd option, do not * call atexit functions of ncurses which may hang. */ if (dialog_state.input) { fclose(dialog_state.input); dialog_state.input = 0; } if (dialog_state.pipe_input) { if (dialog_state.pipe_input != stdin) { fclose(dialog_state.pipe_input); dialog_state.pipe_input = 0; } } _exit(code); } } /* quit program killing all tailbg */ void dlg_exiterr(const char *fmt,...) { int retval; va_list ap; end_dialog(); (void) fputc('\n', stderr); va_start(ap, fmt); (void) vfprintf(stderr, fmt, ap); va_end(ap); (void) fputc('\n', stderr); dlg_killall_bg(&retval); (void) fflush(stderr); (void) fflush(stdout); dlg_exit(DLG_EXIT_ERROR); } void dlg_beeping(void) { if (dialog_vars.beep_signal) { (void) beep(); dialog_vars.beep_signal = 0; } } void dlg_print_size(int height, int width) { if (dialog_vars.print_siz) fprintf(dialog_state.output, "Size: %d, %d\n", height, width); } void dlg_ctl_size(int height, int width) { if (dialog_vars.size_err) { if ((width > COLS) || (height > LINES)) { dlg_exiterr("Window too big. (height, width) = (%d, %d). Max allowed (%d, %d).", height, width, LINES, COLS); } #ifdef HAVE_COLOR else if ((dialog_state.use_shadow) && ((width > SCOLS || height > SLINES))) { if ((width <= COLS) && (height <= LINES)) { /* try again, without shadows */ dialog_state.use_shadow = 0; } else { dlg_exiterr("Window+Shadow too big. (height, width) = (%d, %d). Max allowed (%d, %d).", height, width, SLINES, SCOLS); } } #endif } } /* * If the --tab-correct was not selected, convert tabs to single spaces. */ void dlg_tab_correct_str(char *prompt) { char *ptr; if (dialog_vars.tab_correct) { while ((ptr = strchr(prompt, TAB)) != NULL) { *ptr = ' '; prompt = ptr; } } } void dlg_calc_listh(int *height, int *list_height, int item_no) { /* calculate new height and list_height */ int rows = SLINES - (dialog_vars.begin_set ? dialog_vars.begin_y : 0); if (rows - (*height) > 0) { if (rows - (*height) > item_no) *list_height = item_no; else *list_height = rows - (*height); } (*height) += (*list_height); } /* obsolete */ int dlg_calc_listw(int item_no, char **items, int group) { int n, i, len1 = 0, len2 = 0; for (i = 0; i < (item_no * group); i += group) { if ((n = dlg_count_columns(items[i])) > len1) len1 = n; if ((n = dlg_count_columns(items[i + 1])) > len2) len2 = n; } return len1 + len2; } int dlg_calc_list_width(int item_no, DIALOG_LISTITEM * items) { int n, i, len1 = 0, len2 = 0; for (i = 0; i < item_no; ++i) { if ((n = dlg_count_columns(items[i].name)) > len1) len1 = n; if ((n = dlg_count_columns(items[i].text)) > len2) len2 = n; } return len1 + len2; } char * dlg_strempty(void) { static char empty[] = ""; return empty; } char * dlg_strclone(const char *cprompt) { char *prompt = dlg_malloc(char, strlen(cprompt) + 1); assert_ptr(prompt, "dlg_strclone"); strcpy(prompt, cprompt); return prompt; } chtype dlg_asciibox(chtype ch) { chtype result = 0; if (ch == ACS_ULCORNER) result = '+'; else if (ch == ACS_LLCORNER) result = '+'; else if (ch == ACS_URCORNER) result = '+'; else if (ch == ACS_LRCORNER) result = '+'; else if (ch == ACS_HLINE) result = '-'; else if (ch == ACS_VLINE) result = '|'; else if (ch == ACS_LTEE) result = '+'; else if (ch == ACS_RTEE) result = '+'; else if (ch == ACS_UARROW) result = '^'; else if (ch == ACS_DARROW) result = 'v'; return result; } chtype dlg_boxchar(chtype ch) { chtype result = dlg_asciibox(ch); if (result != 0) { if (dialog_vars.ascii_lines) ch = result; else if (dialog_vars.no_lines) ch = ' '; } return ch; } int dlg_box_x_ordinate(int width) { int x; if (dialog_vars.begin_set == 1) { x = dialog_vars.begin_x; } else { /* center dialog box on screen unless --begin-set */ x = (SCOLS - width) / 2; } return x; } int dlg_box_y_ordinate(int height) { int y; if (dialog_vars.begin_set == 1) { y = dialog_vars.begin_y; } else { /* center dialog box on screen unless --begin-set */ y = (SLINES - height) / 2; } return y; } void dlg_draw_title(WINDOW *win, const char *title) { if (title != NULL) { chtype attr = A_NORMAL; chtype save = getattrs(win); int x = centered(getmaxx(win), title); wattrset(win, title_attr); wmove(win, 0, x); dlg_print_text(win, title, getmaxx(win) - x, &attr); wattrset(win, save); } } void dlg_draw_bottom_box(WINDOW *win) { int width = getmaxx(win); int height = getmaxy(win); int i; wattrset(win, border_attr); (void) wmove(win, height - 3, 0); (void) waddch(win, dlg_boxchar(ACS_LTEE)); for (i = 0; i < width - 2; i++) (void) waddch(win, dlg_boxchar(ACS_HLINE)); wattrset(win, dialog_attr); (void) waddch(win, dlg_boxchar(ACS_RTEE)); (void) wmove(win, height - 2, 1); for (i = 0; i < width - 2; i++) (void) waddch(win, ' '); } /* * Remove a window, repainting everything else. This would be simpler if we * used the panel library, but that is not _always_ available. */ void dlg_del_window(WINDOW *win) { DIALOG_WINDOWS *p, *q, *r; /* * If --keep-window was set, do not delete/repaint the windows. */ if (dialog_vars.keep_window) return; /* Leave the main window untouched if there are no background windows. * We do this so the current window will not be cleared on exit, allowing * things like the infobox demo to run without flicker. */ if (dialog_state.getc_callbacks != 0) { touchwin(stdscr); wnoutrefresh(stdscr); } for (p = dialog_state.all_windows, q = r = 0; p != 0; r = p, p = p->next) { if (p->normal == win) { q = p; /* found a match - should be only one */ if (r == 0) { dialog_state.all_windows = p->next; } else { r->next = p->next; } } else { if (p->shadow != 0) { touchwin(p->shadow); wnoutrefresh(p->shadow); } touchwin(p->normal); wnoutrefresh(p->normal); } } if (q) { delwin(q->normal); dlg_unregister_window(q->normal); free(q); } doupdate(); } /* * Create a window, optionally with a shadow. */ WINDOW * dlg_new_window(int height, int width, int y, int x) { WINDOW *win; DIALOG_WINDOWS *p = dlg_calloc(DIALOG_WINDOWS, 1); if ((win = newwin(height, width, y, x)) == 0) { dlg_exiterr("Can't make new window at (%d,%d), size (%d,%d).\n", y, x, height, width); } p->next = dialog_state.all_windows; p->normal = win; dialog_state.all_windows = p; #ifdef HAVE_COLOR if (dialog_state.use_shadow) { draw_childs_shadow(p->shadow = stdscr, win); } #endif (void) keypad(win, TRUE); return win; } WINDOW * dlg_new_modal_window(WINDOW *parent, int height, int width, int y, int x) { WINDOW *win; DIALOG_WINDOWS *p = dlg_calloc(DIALOG_WINDOWS, 1); (void) parent; if ((win = newwin(height, width, y, x)) == 0) { dlg_exiterr("Can't make new window at (%d,%d), size (%d,%d).\n", y, x, height, width); } p->next = dialog_state.all_windows; p->normal = win; dialog_state.all_windows = p; #ifdef HAVE_COLOR if (dialog_state.use_shadow) { draw_childs_shadow(p->shadow = parent, win); } #endif (void) keypad(win, TRUE); return win; } /* * Move/Resize a window, optionally with a shadow. */ #ifdef KEY_RESIZE void dlg_move_window(WINDOW *win, int height, int width, int y, int x) { DIALOG_WINDOWS *p, *q; if (win != 0) { dlg_ctl_size(height, width); for (p = dialog_state.all_windows; p != 0; p = q) { q = p->next; if (p->normal == win) { break; } } if (p != 0) { (void) wresize(win, height, width); (void) mvwin(win, y, x); #ifdef HAVE_COLOR if (p->shadow != 0) { if (dialog_state.use_shadow) { (void) mvwin(p->shadow, y + SHADOW_ROWS, x + SHADOW_COLS); } else { p->shadow = 0; } } #endif (void) refresh(); #ifdef HAVE_COLOR if (p->shadow) draw_childs_shadow(p->shadow, win); #endif } } } #endif /* KEY_RESIZE */ WINDOW * dlg_sub_window(WINDOW *parent, int height, int width, int y, int x) { WINDOW *win; if ((win = subwin(parent, height, width, y, x)) == 0) { dlg_exiterr("Can't make sub-window at (%d,%d), size (%d,%d).\n", y, x, height, width); } (void) keypad(win, TRUE); return win; } /* obsolete */ int dlg_default_item(char **items, int llen) { int result = 0; if (dialog_vars.default_item != 0) { int count = 0; while (*items != 0) { if (!strcmp(dialog_vars.default_item, *items)) { result = count; break; } items += llen; count++; } } return result; } int dlg_default_listitem(DIALOG_LISTITEM * items) { int result = 0; if (dialog_vars.default_item != 0) { int count = 0; while (items->name != 0) { if (!strcmp(dialog_vars.default_item, items->name)) { result = count; break; } ++items; count++; } } return result; } /* * Draw the string for item_help */ void dlg_item_help(const char *txt) { if (USE_ITEM_HELP(txt)) { chtype attr = A_NORMAL; int y, x; wattrset(stdscr, itemhelp_attr); (void) wmove(stdscr, LINES - 1, 0); (void) wclrtoeol(stdscr); (void) addch(' '); dlg_print_text(stdscr, txt, COLS - 1, &attr); if (itemhelp_attr & A_COLOR) { /* fill the remainder of the line with the window's attributes */ getyx(stdscr, y, x); while (x < COLS) { (void) addch(' '); ++x; } } (void) wnoutrefresh(stdscr); } } #ifndef HAVE_STRCASECMP int dlg_strcmp(const char *a, const char *b) { int ac, bc, cmp; for (;;) { ac = UCH(*a++); bc = UCH(*b++); if (isalpha(ac) && islower(ac)) ac = _toupper(ac); if (isalpha(bc) && islower(bc)) bc = _toupper(bc); cmp = ac - bc; if (ac == 0 || bc == 0 || cmp != 0) break; } return cmp; } #endif /* * Returns true if 'dst' points to a blank which follows another blank which * is not a leading blank on a line. */ static bool trim_blank(char *base, char *dst) { int count = 0; while (dst-- != base) { if (*dst == '\n') { return FALSE; } else if (*dst != ' ') { return (count > 1); } else { count++; } } return FALSE; } /* * Change embedded "\n" substrings to '\n' characters and tabs to single * spaces. If there are no "\n"s, it will strip all extra spaces, for * justification. If it has "\n"'s, it will preserve extra spaces. If cr_wrap * is set, it will preserve '\n's. */ void dlg_trim_string(char *s) { char *base = s; char *p1; char *p = s; int has_newlines = (strstr(s, "\\n") != 0); while (*p != '\0') { if (*p == TAB && !dialog_vars.nocollapse) *p = ' '; if (has_newlines) { /* If prompt contains "\n" strings */ if (*p == '\\' && *(p + 1) == 'n') { *s++ = '\n'; p += 2; p1 = p; /* * Handle end of lines intelligently. If '\n' follows "\n" * then ignore the '\n'. This eliminates the need to escape * the '\n' character (no need to use "\n\"). */ while (*p1 == ' ') p1++; if (*p1 == '\n') p = p1 + 1; } else if (*p == '\n') { if (dialog_vars.cr_wrap) *s++ = *p++; else { /* Replace the '\n' with a space if cr_wrap is not set */ if (!trim_blank(base, s)) *s++ = ' '; p++; } } else /* If *p != '\n' */ *s++ = *p++; } else if (dialog_vars.trim_whitespace) { if (*p == ' ') { if (*(s - 1) != ' ') { *s++ = ' '; p++; } else p++; } else if (*p == '\n') { if (dialog_vars.cr_wrap) *s++ = *p++; else if (*(s - 1) != ' ') { /* Strip '\n's if cr_wrap is not set. */ *s++ = ' '; p++; } else p++; } else *s++ = *p++; } else { /* If there are no "\n" strings */ if (*p == ' ' && !dialog_vars.nocollapse) { if (!trim_blank(base, s)) *s++ = *p; p++; } else *s++ = *p++; } } *s = '\0'; } void dlg_set_focus(WINDOW *parent, WINDOW *win) { if (win != 0) { (void) wmove(parent, getpary(win) + getcury(win), getparx(win) + getcurx(win)); (void) wnoutrefresh(win); (void) doupdate(); } } /* * Returns the nominal maximum buffer size. */ int dlg_max_input(int max_len) { if (dialog_vars.max_input != 0 && dialog_vars.max_input < MAX_LEN) max_len = dialog_vars.max_input; return max_len; } /* * Free storage used for the result buffer. */ void dlg_clr_result(void) { if (dialog_vars.input_length) { dialog_vars.input_length = 0; if (dialog_vars.input_result) free(dialog_vars.input_result); } dialog_vars.input_result = 0; } /* * Setup a fixed-buffer for the result. */ char * dlg_set_result(const char *string) { unsigned need = string ? strlen(string) + 1 : 0; /* inputstr.c needs a fixed buffer */ if (need < MAX_LEN) need = MAX_LEN; /* * If the buffer is not big enough, allocate a new one. */ if (dialog_vars.input_length != 0 || dialog_vars.input_result == 0 || need > MAX_LEN) { dlg_clr_result(); dialog_vars.input_length = need; dialog_vars.input_result = dlg_malloc(char, need); assert_ptr(dialog_vars.input_result, "dlg_set_result"); } strcpy(dialog_vars.input_result, string ? string : ""); return dialog_vars.input_result; } /* * Accumulate results in dynamically allocated buffer. * If input_length is zero, it is a MAX_LEN buffer belonging to the caller. */ void dlg_add_result(const char *string) { unsigned have = (dialog_vars.input_result ? strlen(dialog_vars.input_result) : 0); unsigned want = strlen(string) + 1 + have; if ((want >= MAX_LEN) || (dialog_vars.input_length != 0) || (dialog_vars.input_result == 0)) { if (dialog_vars.input_length == 0 || dialog_vars.input_result == 0) { char *save = dialog_vars.input_result; dialog_vars.input_length = want * 2; dialog_vars.input_result = dlg_malloc(char, dialog_vars.input_length); assert_ptr(dialog_vars.input_result, "dlg_add_result malloc"); dialog_vars.input_result[0] = 0; if (save != 0) strcpy(dialog_vars.input_result, save); } else if (want >= dialog_vars.input_length) { dialog_vars.input_length = want * 2; dialog_vars.input_result = dlg_realloc(char, dialog_vars.input_length, dialog_vars.input_result); assert_ptr(dialog_vars.input_result, "dlg_add_result realloc"); } } strcat(dialog_vars.input_result, string); } /* * These are characters that (aside from the quote-delimiter) will have to * be escaped in a single- or double-quoted string. */ #define FIX_SINGLE "\n\\" #define FIX_DOUBLE FIX_SINGLE "[]{}?*;`~#$^&()|<>" /* * Returns the quote-delimiter. */ static const char * quote_delimiter(void) { return dialog_vars.single_quoted ? "'" : "\""; } /* * Returns true if we should quote the given string. */ static bool must_quote(char *string) { bool code = FALSE; if (*string != '\0') { unsigned len = strlen(string); if (strcspn(string, quote_delimiter()) != len) code = TRUE; else if (strcspn(string, "\n\t ") != len) code = TRUE; else code = (strcspn(string, FIX_DOUBLE) != len); } else { code = TRUE; } return code; } /* * Add a quoted string to the result buffer. */ void dlg_add_quoted(char *string) { char temp[2]; const char *my_quote = quote_delimiter(); const char *must_fix = (dialog_vars.single_quoted ? FIX_SINGLE : FIX_DOUBLE); if (dialog_vars.quoted || must_quote(string)) { temp[1] = '\0'; dlg_add_result(my_quote); while (*string != '\0') { temp[0] = *string++; if (strchr(my_quote, *temp) || strchr(must_fix, *temp)) dlg_add_result("\\"); dlg_add_result(temp); } dlg_add_result(my_quote); } else { dlg_add_result(string); } } /* * When adding a result, make that depend on whether "--quoted" is used. */ void dlg_add_string(char *string) { if (dialog_vars.quoted) { dlg_add_quoted(string); } else { dlg_add_result(string); } } bool dlg_need_separator(void) { bool result = FALSE; if (dialog_vars.output_separator) { result = TRUE; } else if (dialog_vars.input_result && *(dialog_vars.input_result)) { result = TRUE; } return result; } void dlg_add_separator(void) { const char *separator = (dialog_vars.separate_output) ? "\n" : " "; if (dialog_vars.output_separator) separator = dialog_vars.output_separator; dlg_add_result(separator); } /* * Some widgets support only one value of a given variable - save/restore the * global dialog_vars so we can override it consistently. */ void dlg_save_vars(DIALOG_VARS * vars) { *vars = dialog_vars; } void dlg_restore_vars(DIALOG_VARS * vars) { dialog_vars = *vars; } /* * Called each time a widget is invoked which may do output, increment a count. */ void dlg_does_output(void) { dialog_state.output_count += 1; } /* * Compatibility for different versions of curses. */ #if !(defined(HAVE_GETBEGX) && defined(HAVE_GETBEGY)) int getbegx(WINDOW *win) { int y, x; getbegyx(win, y, x); return x; } int getbegy(WINDOW *win) { int y, x; getbegyx(win, y, x); return y; } #endif #if !(defined(HAVE_GETCURX) && defined(HAVE_GETCURY)) int getcurx(WINDOW *win) { int y, x; getyx(win, y, x); return x; } int getcury(WINDOW *win) { int y, x; getyx(win, y, x); return y; } #endif #if !(defined(HAVE_GETMAXX) && defined(HAVE_GETMAXY)) int getmaxx(WINDOW *win) { int y, x; getmaxyx(win, y, x); return x; } int getmaxy(WINDOW *win) { int y, x; getmaxyx(win, y, x); return y; } #endif #if !(defined(HAVE_GETPARX) && defined(HAVE_GETPARY)) int getparx(WINDOW *win) { int y, x; getparyx(win, y, x); return x; } int getpary(WINDOW *win) { int y, x; getparyx(win, y, x); return y; } #endif