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freebsd-skq/contrib/dialog/util.c
Nathan Whitehorn 7a1c0d9633 Update dialog to version 1.1-20110302.
2011-04-17 17:28:17 +00:00

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/*
* $Id: util.c,v 1.211 2011/01/19 00:31:43 tom Exp $
*
* util.c -- miscellaneous utilities for dialog
*
* Copyright 2000-2010,2011 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 <dialog.h>
#include <dlg_keys.h>
#ifdef NCURSES_VERSION
#if defined(HAVE_NCURSESW_TERM_H)
#include <ncursesw/term.h>
#elif defined(HAVE_NCURSES_TERM_H)
#include <ncurses/term.h>
#else
#include <term.h>
#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 <dlg_colors.h>
#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"),
DATA(A_REVERSE, GAUGE, gauge, "Dialog box gauge")
};
/* *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();
if (!dialog_state.no_mouse) {
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]);
}
/*
* Wrapper for getattrs(), or the more cumbersome X/Open wattr_get().
*/
chtype
dlg_get_attrs(WINDOW *win)
{
chtype result;
#ifdef HAVE_GETATTRS
result = getattrs(win);
#else
attr_t my_result;
short my_pair;
wattr_get(win, &my_result, &my_pair, NULL);
result = my_result;
#endif
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.
*/
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 = dlg_get_attrs(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;
}
#ifdef USE_WIDE_CURSES
static bool
is_combining(const char *txt, int *combined)
{
bool result = FALSE;
if (*combined == 0) {
if (UCH(*txt) >= 128) {
wchar_t wch;
mbstate_t state;
size_t given = strlen(txt);
size_t len;
memset(&state, 0, sizeof(state));
len = mbrtowc(&wch, txt, given, &state);
if ((int) len > 0 && wcwidth(wch) == 0) {
*combined = (int) len - 1;
result = TRUE;
}
}
} else {
result = TRUE;
*combined -= 1;
}
return result;
}
#endif
/*
* 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;
#ifdef USE_WIDE_CURSES
int combined = 0;
#endif
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)
#ifdef USE_WIDE_CURSES
&& !is_combining(txt, &combined)
#endif
)) {
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];
#ifdef USE_WIDE_CURSES
if (UCH(*wrap_ptr) >= 128) {
int combined = 0;
while (is_combining(wrap_ptr, &combined)) {
++wrap_ptr;
}
}
#endif
/*
* 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;
(void) pauseopt; /* used only for ncurses */
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 = (int) offset;
count++;
}
/* now 'count' has the number of lines of fd and 'len' the max length */
*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 <file> on the screen.
Msgbox-like widget instead have to put all <text> 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 = dlg_get_attrs(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 = dlg_get_attrs(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 = (int) 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 = dlg_get_attrs(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 ? (unsigned) 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
? (unsigned) strlen(dialog_vars.input_result)
: 0);
unsigned want = (unsigned) 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_result = 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_result != 0)
strcpy(dialog_vars.input_result, save_result);
} 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') {
size_t 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;
}
/*
* Most of the data in DIALOG_VARS is normally set by command-line options.
* The input_result member is an exception; it is normally set by the dialog
* library to return result values.
*/
void
dlg_restore_vars(DIALOG_VARS * vars)
{
char *save_result = dialog_vars.input_result;
unsigned save_length = dialog_vars.input_length;
dialog_vars = *vars;
dialog_vars.input_result = save_result;
dialog_vars.input_length = save_length;
}
/*
* 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
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