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ncurses/test/demo_forms.c

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/****************************************************************************
* Copyright 2018-2019,2020 Thomas E. Dickey *
* Copyright 2003-2016,2017 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/*
* $Id: demo_forms.c,v 1.57 2020/02/02 23:34:34 tom Exp $
*
* Demonstrate a variety of functions from the form library.
* Thomas Dickey - 2003/4/26
*/
/*
dup_field -
field_init -
field_just -
field_term -
form_init -
form_opts -
form_opts_off -
form_opts_on -
form_request_by_name -
form_term -
form_userptr -
free_fieldtype -
link_field -
link_fieldtype -
move_field -
new_page -
pos_form_cursor -
set_field_init -
set_field_term -
set_fieldtype_arg -
set_fieldtype_choice -
set_form_fields -
set_form_init -
set_form_opts -
set_form_page -
set_form_term -
set_form_userptr -
set_max_field -
*/
#include <test.priv.h>
#if USE_LIBFORM
#include <edit_field.h>
typedef struct {
char *name;
char *value;
} MY_DATA;
static MY_DATA *my_data;
static int d_option = 0;
static int j_value = 0;
static int m_value = 0;
static int o_value = 0;
static char *t_value = 0;
static void
failed(const char *s)
{
perror(s);
ExitProgram(EXIT_FAILURE);
}
static void
chomp(char *value)
{
size_t have = strlen(value);
while (have != 0 && (value[have - 1] == '\n' || value[have - 1] == '\r')) {
value[--have] = '\0';
}
}
static int
trimmed(const char *value)
{
int result = (int) strlen(value);
while (result > 0 && isspace(UChar(value[result - 1]))) {
--result;
}
return result;
}
static char *
get_data(const char *name)
{
char *result = t_value;
if (my_data != 0) {
int n;
for (n = 0; my_data[n].name != 0; ++n) {
if (!strcmp(name, my_data[n].name)) {
result = my_data[n].value;
break;
}
}
}
return result;
}
/*
* Read (possibly) multi-line data with name+value pairs.
*/
static void
read_data(const char *filename)
{
FILE *fp = fopen(filename, "r");
if (fp != 0) {
char buffer[BUFSIZ];
char *colon;
int more = 0;
int item = 0;
my_data = typeCalloc(MY_DATA, (size_t) 100); /* FIXME */
while (fgets(buffer, sizeof(buffer), fp) != 0) {
chomp(buffer);
if (more) {
if (strcmp(buffer, ".")) {
char *prior = my_data[more - 1].value;
size_t need = strlen(buffer) + 2 + strlen(prior);
char *value = typeRealloc(char, need, prior);
if (value == 0)
failed("realloc");
_nc_STRCAT(value, "\n", need);
_nc_STRCAT(value, buffer, need);
my_data[more - 1].value = value;
} else {
more = 0;
}
} else if (*buffer == '#') {
continue;
} else if ((colon = strchr(buffer, ':')) != 0) {
char *name;
char *value;
*colon++ = '\0';
name = strdup(buffer);
value = strdup(colon);
if (name == 0 || value == 0)
failed("strdup");
my_data[item].name = name;
my_data[item].value = value;
more = ++item;
} else {
failed("expected a colon");
}
}
fclose(fp);
} else {
failed(filename);
}
}
static FIELD *
make_label(const char *label, int frow, int fcol)
{
FIELD *f = new_field(1, (int) strlen(label), frow, fcol, 0, 0);
if (f) {
set_field_buffer(f, 0, label);
set_field_opts(f, (int) ((unsigned) field_opts(f) & ~O_ACTIVE));
}
return (f);
}
/*
* Define each field with an extra one, for reflecting "actual" text.
*/
static FIELD *
make_field(const char *label, int frow, int fcol, int rows, int cols)
{
FIELD *f = new_field(rows, cols, frow, fcol, o_value, 1);
if (f) {
set_field_back(f, A_UNDERLINE);
/*
* If -j and -d options are combined, -j loses. It is documented in
* "Character User Interface Programming", page 12-15 that setting
* O_STATIC off makes the form library ignore justification.
*/
set_field_just(f, j_value);
if (d_option) {
if (has_colors()) {
set_field_fore(f, (chtype) COLOR_PAIR(2));
set_field_back(f, (A_UNDERLINE | (chtype) COLOR_PAIR(3)));
} else {
set_field_fore(f, A_BOLD);
}
/*
* The field_opts_off() call dumps core with Solaris curses,
* but that is a known bug in Solaris' form library -TD
*/
field_opts_off(f, O_STATIC);
set_max_field(f, m_value);
}
init_edit_field(f, get_data(label));
}
return (f);
}
static void
display_form(FORM *f)
{
WINDOW *w;
int rows, cols;
scale_form(f, &rows, &cols);
/*
* Put the form at the upper-left corner of the display, with just a box
* around it.
*/
if ((w = newwin(rows + 2, cols + 4, 0, 0)) != (WINDOW *) 0) {
set_form_win(f, w);
set_form_sub(f, derwin(w, rows, cols, 1, 2));
box(w, 0, 0);
keypad(w, TRUE);
if (post_form(f) != E_OK)
wrefresh(w);
}
}
static void
erase_form(FORM *f)
{
WINDOW *w = form_win(f);
WINDOW *s = form_sub(f);
unpost_form(f);
werase(w);
wrefresh(w);
delwin(s);
delwin(w);
}
static void
show_insert_mode(bool insert_mode)
{
MvAddStr(5, 57, (insert_mode
? "form_status: insert "
: "form_status: overlay"));
}
#define O_SELECTABLE (O_ACTIVE | O_VISIBLE)
static FIELD *
another_field(FORM *form, FIELD *field)
{
FIELD **f = form_fields(form);
FIELD *result = 0;
int n;
for (n = 0; f[n] != 0; ++n) {
if (f[n] != field) {
result = f[n];
field_opts_on(result, O_SELECTABLE);
break;
}
}
return result;
}
static int
my_form_driver(FORM *form, int c)
{
static bool insert_mode = TRUE;
FIELD *field;
switch (c) {
case MY_QUIT:
if (form_driver(form, REQ_VALIDATION) == E_OK)
return (TRUE);
break;
case MY_HELP:
help_edit_field();
break;
case MY_EDT_MODE:
if ((field = current_field(form)) != 0) {
set_current_field(form, another_field(form, field));
if ((unsigned) field_opts(field) & O_EDIT) {
field_opts_off(field, O_EDIT);
set_field_status(field, 0);
} else {
field_opts_on(field, O_EDIT);
}
set_current_field(form, field);
}
break;
case MY_INS_MODE:
/* there should be a form_status() function, but there is none */
if (!insert_mode) {
if (form_driver(form, REQ_INS_MODE) == E_OK) {
insert_mode = TRUE;
}
} else {
if (form_driver(form, REQ_OVL_MODE) == E_OK) {
insert_mode = FALSE;
}
}
show_insert_mode(insert_mode);
refresh();
break;
default:
beep();
break;
}
return (FALSE);
}
static void
show_current_field(WINDOW *win, FORM *form)
{
FIELD *field;
int field_rows, field_cols, field_max;
int currow, curcol;
if (has_colors()) {
wbkgd(win, (chtype) COLOR_PAIR(1));
}
werase(win);
form_getyx(form, currow, curcol);
wprintw(win, "Cursor: %d,%d", currow, curcol);
if (data_ahead(form))
waddstr(win, " ahead");
if (data_behind(form))
waddstr(win, " behind");
waddch(win, '\n');
if ((field = current_field(form)) != 0) {
FIELDTYPE *type;
int nbuf;
wprintw(win, "Page %d%s, Field %d/%d%s:",
form_page(form),
new_page(field) ? "*" : "",
field_index(field), field_count(form),
field_arg(field) ? "(arg)" : "");
if ((type = field_type(field)) != 0) {
if (type == TYPE_ALNUM)
waddstr(win, "ALNUM");
else if (type == TYPE_ALPHA)
waddstr(win, "ALPHA");
else if (type == TYPE_ENUM)
waddstr(win, "ENUM");
else if (type == TYPE_INTEGER)
waddstr(win, "INTEGER");
#ifdef NCURSES_VERSION
else if (type == TYPE_IPV4)
waddstr(win, "IPV4");
#endif
else if (type == TYPE_NUMERIC)
waddstr(win, "NUMERIC");
else if (type == TYPE_REGEXP)
waddstr(win, "REGEXP");
else
waddstr(win, "other");
}
if ((unsigned) field_opts(field) & O_EDIT)
waddstr(win, " editable");
else
waddstr(win, " readonly");
if (field_status(field))
waddstr(win, " modified");
if (dynamic_field_info(field, &field_rows, &field_cols, &field_max)
!= ERR) {
wprintw(win, " size %dx%d (max %d)",
field_rows, field_cols, field_max);
}
waddch(win, ' ');
(void) wattrset(win, AttrArg(field_fore(field), 0));
waddstr(win, "fore");
wattroff(win, (int) field_fore(field));
waddch(win, '/');
(void) wattrset(win, AttrArg(field_back(field), 0));
waddstr(win, "back");
wattroff(win, (int) field_back(field));
wprintw(win, ", pad '%c'", field_pad(field));
waddstr(win, "\n");
for (nbuf = 0; nbuf <= 2; ++nbuf) {
char *buffer;
if ((buffer = field_buffer(field, nbuf)) != 0) {
wprintw(win, "buffer %d:", nbuf);
(void) wattrset(win, A_REVERSE);
if (nbuf) {
waddnstr(win, buffer, trimmed(buffer));
} else {
waddstr(win, buffer);
}
wattroff(win, A_REVERSE);
waddstr(win, "\n");
}
}
}
wrefresh(win);
}
static void
demo_forms(void)
{
FORM *form;
FIELD *f[100]; /* will memset to zero */
int c;
unsigned n = 0;
int pg;
const char *fname;
static const char *my_enum[] =
{"first", "second", "third", 0};
#ifdef NCURSES_MOUSE_VERSION
mousemask(ALL_MOUSE_EVENTS, (mmask_t *) 0);
#endif
help_edit_field();
MvAddStr(4, 57, "Forms Entry Test");
show_insert_mode(TRUE);
refresh();
/* describe the form */
memset(f, 0, sizeof(f));
for (pg = 0; pg < 4; ++pg) {
char label[80];
_nc_SPRINTF(label, _nc_SLIMIT(sizeof(label))
"Sample Form Page %d", pg + 1);
f[n++] = make_label(label, 0, 15);
set_new_page(f[n - 1], TRUE);
switch (pg) {
default:
fname = "Last Name";
f[n++] = make_label(fname, 2, 0);
f[n++] = make_field(fname, 3, 0, 1, 18);
set_field_type(f[n - 1], TYPE_ALPHA, 1);
fname = "First Name";
f[n++] = make_label(fname, 2, 20);
f[n++] = make_field(fname, 3, 20, 1, 12);
set_field_type(f[n - 1], TYPE_ALPHA, 1);
fname = "Middle Name";
f[n++] = make_label(fname, 2, 34);
f[n++] = make_field(fname, 3, 34, 1, 12);
set_field_type(f[n - 1], TYPE_ALPHA, 1);
break;
case 1:
fname = "Last Name";
f[n++] = make_label(fname, 2, 0);
f[n++] = make_field(fname, 3, 0, 1, 12);
set_field_type(f[n - 1], TYPE_ALPHA, 1);
fname = "First Name";
f[n++] = make_label(fname, 2, 14);
f[n++] = make_field(fname, 3, 14, 1, 12);
set_field_type(f[n - 1], TYPE_ALPHA, 1);
fname = "MI";
f[n++] = make_label(fname, 2, 28);
f[n++] = make_field(fname, 3, 28, 1, 1);
set_field_pad(f[n - 1], '?');
set_field_type(f[n - 1], TYPE_ALPHA, 1);
fname = "First/Second/Third";
f[n++] = make_label(fname, 2, 32);
f[n++] = make_field(fname, 3, 32, 1, 12);
set_field_type(f[n - 1], TYPE_ENUM, my_enum, 0, 0);
break;
case 2:
fname = "Host Name";
f[n++] = make_label(fname, 2, 0);
f[n++] = make_field(fname, 3, 0, 1, 24);
set_field_type(f[n - 1], TYPE_ALNUM, 1);
#ifdef NCURSES_VERSION
fname = "IP Address";
f[n++] = make_label(fname, 2, 26);
f[n++] = make_field(fname, 3, 26, 1, 16);
set_field_type(f[n - 1], TYPE_IPV4, 1);
#endif
break;
case 3:
fname = "Four digits";
f[n++] = make_label(fname, 2, 0);
f[n++] = make_field(fname, 3, 0, 1, 10);
set_field_type(f[n - 1], TYPE_INTEGER, 4, 0, 0);
fname = "Numeric";
f[n++] = make_label(fname, 2, 13);
f[n++] = make_field(fname, 3, 13, 1, 12);
set_field_type(f[n - 1], TYPE_NUMERIC, 3, -10000.0, 100000000.0);
fname = "Phone number";
f[n++] = make_label(fname, 2, 27);
f[n++] = make_field(fname, 3, 27, 1, 16);
set_field_type(f[n - 1], TYPE_REGEXP,
"^([0-9]-)?[0-9]{3}-[0-9]{3}-[0-9]{4} *$");;
break;
}
fname = "Comments";
f[n++] = make_label(fname, 5, 0);
f[n++] = make_field(fname, 6, 0, 4, 46);
init_edit_field(f[n - 1], get_data(fname));
}
f[n] = (FIELD *) 0;
if ((form = new_form(f)) != 0) {
WINDOW *w;
WINDOW *also;
int finished = 0;
display_form(form);
w = form_win(form);
also = newwin(getmaxy(stdscr) - getmaxy(w), COLS, getmaxy(w), 0);
show_current_field(also, form);
while (!finished) {
switch (edit_field(form, &c)) {
case E_OK:
break;
case E_UNKNOWN_COMMAND:
finished = my_form_driver(form, c);
break;
default:
beep();
break;
}
show_current_field(also, form);
}
erase_form(form);
free_form(form);
}
for (c = 0; f[c] != 0; c++) {
free_edit_field(f[c]);
free_field(f[c]);
}
noraw();
nl();
#ifdef NCURSES_MOUSE_VERSION
mousemask(0, (mmask_t *) 0);
#endif
}
static void
usage(void)
{
static const char *tbl[] =
{
"Usage: demo_forms [options] [data file]"
,""
," -d make fields dynamic"
," -j value justify (1=left, 2=center, 3=right)"
," -m value set maximum size of dynamic fields"
," -o value specify number of offscreen rows in new_field()"
," -t value specify text to fill fields initially"
};
unsigned int j;
for (j = 0; j < SIZEOF(tbl); ++j)
fprintf(stderr, "%s\n", tbl[j]);
exit(EXIT_FAILURE);
}
int
main(int argc, char *argv[])
{
int ch;
setlocale(LC_ALL, "");
while ((ch = getopt(argc, argv, "dj:m:o:t:")) != -1) {
switch (ch) {
case 'd':
d_option = TRUE;
break;
case 'j':
j_value = atoi(optarg);
if (j_value < NO_JUSTIFICATION
|| j_value > JUSTIFY_RIGHT)
usage();
break;
case 'm':
m_value = atoi(optarg);
break;
case 'o':
o_value = atoi(optarg);
break;
case 't':
t_value = optarg;
break;
default:
usage();
}
}
while (optind < argc) {
read_data(argv[optind++]);
}
initscr();
cbreak();
noecho();
raw();
nonl(); /* lets us read ^M's */
intrflush(stdscr, FALSE);
keypad(stdscr, TRUE);
if (has_colors()) {
start_color();
init_pair(1, COLOR_WHITE, COLOR_BLUE);
init_pair(2, COLOR_GREEN, COLOR_BLACK);
init_pair(3, COLOR_CYAN, COLOR_BLACK);
bkgd((chtype) COLOR_PAIR(1));
refresh();
}
demo_forms();
endwin();
ExitProgram(EXIT_SUCCESS);
}
#else
int
main(void)
{
printf("This program requires the curses form library\n");
ExitProgram(EXIT_FAILURE);
}
#endif
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