1 files changed, 149 insertions, 0 deletions

diff --git a/src/boxes/showkey.c b/src/boxes/showkey.c
new file mode 100644
index 0000000..de1f804
--- /dev/null
+++ b/src/boxes/showkey.c
@@ -0,0 +1,149 @@
+/* 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);
+}