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/* showkey.c - Shows the keys pressed.
*
* Copyright 2014 David Seikel <won_fang@yahoo.com.au>
*
* Not actually a standard, seems to be three different versions.
* The original kbd - http://kbd-project.org/
* The kbd fork console-tools - http://lct.sourceforge.net/
* A utility invented by Eric S. Raymond - http://catb.org/esr/showkey/
USE_SHOWKEY(NEWTOY(showkey, "", TOYFLAG_USR|TOYFLAG_BIN))
config SHOWKEY
bool "showkey"
default n
help
usage: showkey
Shows the keys pressed.
*/
#include "toys.h"
#include "lib/handlekeys.h"
typedef void (*eventHandler) (void);
struct keyCommand
{
char *key;
eventHandler handler;
};
GLOBALS(
unsigned h, w;
int x, y;
)
#define TT this.showkey
static void quit()
{
printf("Quitting.\r\n");
handle_keys_quit();
}
// The key to command mappings.
static struct keyCommand simpleKeys[] =
{
{"^C", quit}
};
// Callback for incoming sequences from the terminal.
static int handleEvent(long extra, struct keyevent *event)
{
int i;
switch (event->type)
{
case HK_RAW :
{
printf("RAW ");
for (i = 0; event->sequence[i]; i++)
{
printf("(%x) ", (int) event->sequence[i]);
if (32 > event->sequence[i])
printf("^%c, ", (int) event->sequence[i] + 'A' - 1);
else
printf("%c, ", (int) event->sequence[i]);
}
printf("-> ");
break;
}
case HK_KEYS :
{
int l = strlen(event->sequence);
if (event->isTranslated)
printf("TRANSLATED - ");
else
printf("KEY - ");
printf("%s\r\n", event->sequence);
// Search for a key sequence bound to a command.
for (i = 0; i < ARRAY_LEN(simpleKeys); i++)
{
if (strncmp(simpleKeys[i].key, event->sequence, l) == 0)
{
// If it's a partial match, keep accumulating them.
if (strlen(simpleKeys[i].key) != l)
return 0;
else
if (simpleKeys[i].handler) simpleKeys[i].handler();
}
}
break;
}
case HK_CSI :
{
// Is it a cursor location report?
if (strcmp("R", event->sequence) == 0)
{
printf("CSI cursor position - line %d, column %d\r\n", event->params[0], event->params[1]);
return 1;
}
printf("CSI command %s - ", event->sequence);
for (i = 0; i < event->count; i++)
printf("%d ", event->params[i]);
printf("\r\n");
break;
}
default : break;
}
return 1;
}
void showkey_main(void)
{
struct termios termIo, oldTermIo;
// Grab the old terminal settings and save it.
tcgetattr(0, &oldTermIo);
tcflush(0, TCIFLUSH);
termIo = oldTermIo;
// Mould the terminal to our will.
// In this example we are turning off all the terminal smarts, but real code
// might not want that.
termIo.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL
| IUCLC | IXON | IXOFF | IXANY);
termIo.c_oflag &= ~OPOST;
termIo.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL | TOSTOP | ICANON | ISIG
| IEXTEN);
termIo.c_cflag &= ~(CSIZE | PARENB);
termIo.c_cflag |= CS8;
termIo.c_cc[VTIME]=0; // deciseconds.
termIo.c_cc[VMIN]=1;
tcsetattr(0, TCSANOW, &termIo);
handle_keys(0, handleEvent);
tcsetattr(0, TCSANOW, &oldTermIo);
puts("");
fflush(stdout);
}
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