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ncurses/test/demo_panels.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_panels.c,v 1.45 2020/02/02 23:34:34 tom Exp $
*
* Demonstrate a variety of functions from the panel library.
*/
#include <test.priv.h>
#if USE_LIBPANEL
#include <panel.h>
#define LAST_POS '@'
#define TEMP_POS '>'
typedef void (*InitPanel) (void);
typedef void (*FillPanel) (PANEL *);
static bool use_colors = FALSE;
static bool unboxed = FALSE;
static FILE *log_in;
static FILE *log_out;
static void
close_input(void)
{
if (log_in != 0) {
fclose(log_in);
log_in = 0;
}
}
static void
close_output(void)
{
if (log_out != 0) {
fclose(log_out);
log_out = 0;
}
}
static WINDOW *
statusline(void)
{
WINDOW *result = stdscr;
wmove(result, LINES - 1, 0);
wclrtoeol(result);
return result;
}
static void
pflush(void)
{
update_panels();
doupdate();
}
static void
saywhat(NCURSES_CONST char *text)
{
WINDOW *win = statusline();
if (text != 0 && *text != '\0') {
waddstr(win, text);
waddstr(win, "; ");
}
waddstr(win, "press any key to continue");
}
static void
show_position(NCURSES_CONST char *text,
NCURSES_CONST char *also,
int which,
int ypos,
int xpos)
{
WINDOW *win = statusline();
wprintw(win, "%s for panel %d now %d,%d%s", text, which, ypos, xpos, also);
wmove(stdscr, ypos, xpos);
}
static int
get_position(NCURSES_CONST char *text,
NCURSES_CONST char *also,
int which,
int *xpos,
int *ypos)
{
int result = 0;
int x1, y1;
char cmd;
getyx(stdscr, y1, x1);
(void) statusline();
show_position(text, also, which, y1, x1);
if (log_in != 0) {
if (fscanf(log_in, "%c%d,%d\n", &cmd, &y1, &x1) == 3) {
switch (cmd) {
case LAST_POS:
result = 1;
(void) wgetch(stdscr);
break;
case TEMP_POS:
result = 0;
wrefresh(stdscr);
napms(100);
break;
default:
result = -1;
break;
}
} else {
result = -1;
}
} else {
switch (wgetch(stdscr)) {
case QUIT:
case ESCAPE:
case ERR:
result = -1;
break;
case ' ':
result = 1;
break;
case KEY_UP:
if (y1 > 0) {
--y1;
} else {
beep();
}
break;
case KEY_DOWN:
if (y1 < getmaxy(stdscr)) {
++y1;
} else {
beep();
}
break;
case KEY_LEFT:
if (x1 > 0) {
--x1;
} else {
beep();
}
break;
case KEY_RIGHT:
if (x1 < getmaxx(stdscr)) {
++x1;
} else {
beep();
}
break;
}
}
wmove(stdscr, y1, x1);
*ypos = y1;
*xpos = x1;
if (result >= 0) {
if (log_out)
fprintf(log_out, "%c%d,%d\n",
((result > 0)
? LAST_POS
: TEMP_POS),
y1, x1);
}
return result;
}
static PANEL *
mkpanel(short color, int rows, int cols, int tly, int tlx)
{
WINDOW *win;
PANEL *pan = 0;
char *userdata = typeMalloc(char, 6);
if ((win = newwin(rows, cols, tly, tlx)) != 0) {
keypad(win, TRUE);
if ((pan = new_panel(win)) == 0) {
delwin(win);
} else if (use_colors) {
short fg = (short) ((color == COLOR_BLUE)
? COLOR_WHITE
: COLOR_BLACK);
short bg = color;
init_pair(color, fg, bg);
wbkgdset(win, (chtype) (COLOR_PAIR(color) | ' '));
} else if (!unboxed) {
wbkgdset(win, A_BOLD | ' ');
}
}
_nc_SPRINTF(userdata, _nc_SLIMIT(4) "p%d", color % 8);
set_panel_userptr(pan, (NCURSES_CONST void *) userdata);
return pan;
}
static void
my_remove_panel(PANEL **pans, int which)
{
if (pans[which] != 0) {
PANEL *pan = pans[which];
WINDOW *win = panel_window(pan);
char *user = (char *) panel_userptr(pan);
free(user);
del_panel(pan);
delwin(win);
pans[which] = 0;
}
}
#undef MIN
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#define ABS(a) ((a) < 0 ? -(a) : (a))
static void
my_create_panel(PANEL **pans, int which, FillPanel myFill)
{
int code;
short pair = (short) which;
short fg = (short) ((pair == COLOR_BLUE) ? COLOR_WHITE : COLOR_BLACK);
short bg = pair;
int x0, y0, x1, y1;
init_pair(pair, fg, bg);
/* remove the old panel, if any */
my_remove_panel(pans, which);
/* get the position of one corner */
wmove(stdscr, getmaxy(stdscr) / 2, getmaxx(stdscr) / 2);
getyx(stdscr, y0, x0);
while ((code = get_position("First corner", "", which, &x0, &y0)) == 0) {
;
}
if (code > 0) {
char also[80];
_nc_SPRINTF(also, _nc_SLIMIT(sizeof(also)) " (first %d,%d)", y0, x0);
/* get the position of the opposite corner */
while ((code = get_position("Opposite corner",
also, which, &x1, &y1)) == 0) {
;
}
if (code > 0) {
int tly = MIN(y0, y1);
int tlx = MIN(x0, x1);
PANEL *pan = mkpanel(pair,
ABS(y1 - y0) + 1,
ABS(x1 - x0) + 1,
tly, tlx);
/* finish */
myFill(pan);
pans[which] = pan;
pflush();
wmove(stdscr, y1, x1);
}
}
}
static void
my_move_panel(PANEL **pans, int which, bool continuous)
{
if (pans[which] != 0) {
int code;
int y0, x0;
int y1, x1;
WINDOW *win = panel_window(pans[which]);
char also[80];
getbegyx(win, y0, x0);
_nc_SPRINTF(also, _nc_SLIMIT(sizeof(also)) " (start %d,%d)", y0, x0);
wmove(stdscr, y0, x0);
while ((code = get_position("Move panel", also, which, &x1, &y1)) == 0) {
if (continuous) {
move_panel(pans[which], y1, x1);
pflush();
}
}
if (code > 0) {
move_panel(pans[which], y1, x1);
}
}
}
static void
my_resize_panel(PANEL **pans, int which, FillPanel myFill)
{
if (pans[which] != 0) {
int code;
int y0, x0;
int y1, x1;
WINDOW *win = panel_window(pans[which]);
char also[80];
getbegyx(win, y0, x0);
_nc_SPRINTF(also, _nc_SLIMIT(sizeof(also)) " (start %d,%d)", y0, x0);
wmove(stdscr, y0, x0);
while ((code = get_position("Resize panel",
also, which, &x1, &y1)) == 0) {
;
}
if (code > 0) {
WINDOW *next = newwin(ABS(y1 - y0) + 1,
ABS(x1 - x0) + 1,
MIN(y0, y1),
MIN(x0, x1));
if (next != 0) {
keypad(next, TRUE);
if (use_colors) {
wbkgdset(next, (chtype) (COLOR_PAIR(which) | ' '));
} else if (!unboxed) {
wbkgdset(next, A_BOLD | ' ');
}
replace_panel(pans[which], next);
myFill(pans[which]);
delwin(win);
}
}
}
}
static void
init_panel(void)
{
register int y, x;
for (y = 0; y < LINES - 1; y++) {
for (x = 0; x < COLS; x++)
wprintw(stdscr, "%d", (y + x) % 10);
}
}
static void
fill_panel(PANEL *pan)
{
WINDOW *win = panel_window(pan);
const char *userptr = (const char *) panel_userptr(pan);
int num = (userptr && *userptr) ? userptr[1] : '?';
int y, x;
wmove(win, 1, 1);
wprintw(win, "-pan%c-", num);
wclrtoeol(win);
box(win, 0, 0);
for (y = 2; y < getmaxy(win) - 1; y++) {
for (x = 1; x < getmaxx(win) - 1; x++) {
wmove(win, y, x);
waddch(win, UChar(num));
}
}
}
static void
fill_unboxed(PANEL *pan)
{
WINDOW *win = panel_window(pan);
const char *userptr = (const char *) panel_userptr(pan);
int num = (userptr && *userptr) ? userptr[1] : '?';
int y, x;
for (y = 0; y < getmaxy(win); y++) {
for (x = 0; x < getmaxx(win); x++) {
wmove(win, y, x);
waddch(win, UChar(num));
}
}
}
#if USE_WIDEC_SUPPORT
static void
make_fullwidth_digit(cchar_t *target, int digit)
{
wchar_t source[2];
source[0] = (wchar_t) (digit + 0xff10);
source[1] = 0;
setcchar(target, source, A_NORMAL, 0, 0);
}
static void
init_wide_panel(void)
{
int digit;
cchar_t temp[10];
for (digit = 0; digit < 10; ++digit)
make_fullwidth_digit(&temp[digit], digit);
do {
int y, x;
getyx(stdscr, y, x);
digit = (y + x / 2) % 10;
} while (add_wch(&temp[digit]) != ERR);
}
static void
fill_wide_panel(PANEL *pan)
{
WINDOW *win = panel_window(pan);
int num = ((const char *) panel_userptr(pan))[1];
int y, x;
wmove(win, 1, 1);
wprintw(win, "-pan%c-", num);
wclrtoeol(win);
box(win, 0, 0);
for (y = 2; y < getmaxy(win) - 1; y++) {
for (x = 1; x < getmaxx(win) - 1; x++) {
wmove(win, y, x);
waddch(win, UChar(num));
}
}
}
#endif
#define MAX_PANELS 5
static int
which_panel(PANEL *px[MAX_PANELS + 1], PANEL *pan)
{
int result = 0;
int j;
for (j = 1; j <= MAX_PANELS; ++j) {
if (px[j] == pan) {
result = j;
break;
}
}
return result;
}
static void
show_help(WINDOW *win)
{
static const char *help[] =
{
"",
"Commands are letter/digit pairs. Digits are the panel number.",
"",
" b - put the panel on the bottom of the stack",
" c - create the panel",
" d - delete the panel",
" h - hide the panel",
" m - move the panel (M for continuous move)",
" r - resize the panel",
" s - show the panel",
" t - put the panel on the top of the stack"
};
int j;
for (j = 0; j < (int) SIZEOF(help); ++j) {
if (wprintw(win, "%s\n", help[j]) == ERR)
break;
}
}
static void
show_panels(PANEL *px[MAX_PANELS + 1])
{
struct {
bool valid;
bool hidden;
PANEL *above;
PANEL *below;
} table[MAX_PANELS + 1];
WINDOW *win;
int j;
memset(table, 0, sizeof(table));
for (j = 1; j <= MAX_PANELS; ++j) {
table[j].valid = (px[j] != 0);
if (table[j].valid) {
table[j].hidden = panel_hidden(px[j]);
table[j].above = panel_above(px[j]);
table[j].below = panel_below(px[j]);
}
}
if ((win = newwin(LINES - 1, COLS, 0, 0)) != 0) {
PANEL *pan;
keypad(win, TRUE);
if ((pan = new_panel(win)) != 0) {
werase(win);
MvWPrintw(win, 0, 0, "Panels:\n");
for (j = 1; j <= MAX_PANELS; ++j) {
if (table[j].valid) {
wprintw(win, " %d:", j);
if (table[j].hidden) {
waddstr(win, " hidden");
} else {
if (table[j].above) {
wprintw(win, " above %d",
which_panel(px, table[j].above));
}
if (table[j].below) {
wprintw(win, "%s below %d",
table[j].above ? "," : "",
which_panel(px, table[j].below));
}
}
waddch(win, '\n');
}
}
show_help(win);
wgetch(win);
del_panel(pan);
pflush();
}
delwin(win);
}
}
#define wrapper(func) \
static int my_##func(PANEL *pan) \
{ \
int code = ERR; \
if (pan != 0) { \
code = func(pan); \
} \
return code; \
}
/* *INDENT-OFF* */
wrapper(bottom_panel)
wrapper(hide_panel)
wrapper(show_panel)
wrapper(top_panel)
/* *INDENT-ON* */
static void
do_panel(PANEL *px[MAX_PANELS + 1],
NCURSES_CONST char *cmd,
FillPanel myFill)
{
int which = cmd[1] - '0';
if (which < 1 || which > MAX_PANELS) {
beep();
return;
}
if (log_in != 0) {
pflush();
}
saywhat(cmd);
switch (*cmd) {
case 'b':
my_bottom_panel(px[which]);
break;
case 'c':
my_create_panel(px, which, myFill);
break;
case 'd':
my_remove_panel(px, which);
break;
case 'h':
my_hide_panel(px[which]);
break;
case 'm':
my_move_panel(px, which, FALSE);
break;
case 'M':
my_move_panel(px, which, TRUE);
break;
case 'r':
my_resize_panel(px, which, myFill);
break;
case 's':
my_show_panel(px[which]);
break;
case 't':
my_top_panel(px[which]);
break;
}
}
static bool
ok_letter(int ch)
{
return isalpha(UChar(ch)) && strchr("bcdhmMrst", ch) != 0;
}
static bool
ok_digit(int ch)
{
return isdigit(UChar(ch)) && (ch >= '1') && (ch - '0' <= MAX_PANELS);
}
/*
* A command consists of one or more letter/digit pairs separated by a space.
* Digits are limited to 1..MAX_PANELS.
*
* End the command with a newline. Reject other characters.
*/
static bool
get_command(PANEL *px[MAX_PANELS + 1], char *buffer, int limit)
{
int length = 0;
int y0, x0;
WINDOW *win;
getyx(stdscr, y0, x0);
win = statusline();
waddstr(win, "Command:");
buffer[length = 0] = '\0';
if (log_in != 0) {
if (fgets(buffer, limit - 3, log_in) != 0) {
length = (int) strlen(buffer);
while (length > 0 && isspace(UChar(buffer[length - 1])))
buffer[--length] = '\0';
waddstr(win, buffer);
} else {
close_input();
}
(void) wgetch(win);
} else {
int c0 = 0;
for (;;) {
int ch = wgetch(win);
if (ch == ERR || ch == QUIT || ch == ESCAPE) {
buffer[0] = '\0';
break;
} else if (ch == CTRL('L')) {
wrefresh(curscr);
} else if (ch == '\n' || ch == KEY_ENTER) {
break;
} else if (ch == HELP_KEY_1) {
show_panels(px);
} else if (length + 3 < limit) {
if (ch >= KEY_MIN) {
beep();
} else if (ok_letter(UChar(ch))) {
if (isalpha(UChar(c0))) {
beep();
} else if (isdigit(UChar(c0))) {
wprintw(win, " %c", ch);
buffer[length++] = ' ';
buffer[length++] = (char) (c0 = ch);
} else {
wprintw(win, "%c", ch);
buffer[length++] = (char) (c0 = ch);
}
} else if (ok_digit(ch)) {
if (isalpha(UChar(c0))) {
wprintw(win, "%c", ch);
buffer[length++] = (char) (c0 = ch);
} else {
beep();
}
} else if (ch == ' ') {
if (isdigit(UChar(c0))) {
wprintw(win, "%c", ch);
buffer[length++] = (char) (c0 = ch);
} else {
beep();
}
} else {
beep();
}
} else {
beep();
}
}
}
wmove(stdscr, y0, x0);
buffer[length] = '\0';
if (log_out && length) {
fprintf(log_out, "%s\n", buffer);
}
return (length != 0);
}
static void
demo_panels(InitPanel myInit, FillPanel myFill)
{
int itmp;
PANEL *px[MAX_PANELS + 1];
char buffer[BUFSIZ];
scrollok(stdscr, FALSE); /* we don't want stdscr to scroll! */
refresh();
myInit();
memset(px, 0, sizeof(px));
while (get_command(px, buffer, sizeof(buffer))) {
int limit = (int) strlen(buffer);
for (itmp = 0; itmp < limit; itmp += 3) {
do_panel(px, buffer + itmp, myFill);
}
pflush();
}
#if NO_LEAKS
for (itmp = 1; itmp <= MAX_PANELS; ++itmp) {
my_remove_panel(px, itmp);
}
#endif
}
static void
usage(void)
{
static const char *const tbl[] =
{
"Usage: demo_panels [options]"
,""
,"Options:"
," -i file read commands from file"
," -o file record commands in file"
," -m do not use colors"
#if USE_WIDEC_SUPPORT
," -w use wide-characters in panels and background"
#endif
," -x do not enclose panels in boxes"
};
size_t n;
for (n = 0; n < SIZEOF(tbl); n++)
fprintf(stderr, "%s\n", tbl[n]);
ExitProgram(EXIT_FAILURE);
}
int
main(int argc, char *argv[])
{
int c;
bool monochrome = FALSE;
InitPanel myInit = init_panel;
FillPanel myFill = fill_panel;
setlocale(LC_ALL, "");
while ((c = getopt(argc, argv, "i:o:mwx")) != -1) {
switch (c) {
case 'i':
log_in = fopen(optarg, "r");
break;
case 'o':
log_out = fopen(optarg, "w");
break;
case 'm':
monochrome = TRUE;
break;
#if USE_WIDEC_SUPPORT
case 'w':
myInit = init_wide_panel;
myFill = fill_wide_panel;
break;
#endif
case 'x':
unboxed = TRUE;
break;
default:
usage();
}
}
if (unboxed)
myFill = fill_unboxed;
initscr();
cbreak();
noecho();
keypad(stdscr, TRUE);
use_colors = monochrome ? FALSE : has_colors();
if (use_colors)
start_color();
demo_panels(myInit, myFill);
endwin();
close_input();
close_output();
ExitProgram(EXIT_SUCCESS);
}
#else
int
main(void)
{
printf("This program requires the curses panel library\n");
ExitProgram(EXIT_FAILURE);
}
#endif
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