e16-epplets/epplets/E-Exec.c

#include "epplet.h"

#define EPPLET_NAME 	"E-Exec"
#define EPPLET_VERSION 	"0.2"
#define EPPLET_INFO	"Exec a command given by the user"

#define MAX_HIST_LEN	15

Epplet_gadget       textbox = NULL;
char*		    command_history[MAX_HIST_LEN];
int		    current_command = 0;
int		    num_commands = 0;

static void cb_close(void *data);
static void run_contents(void *data);

static void
cb_close(void *data)
{
   Epplet_cleanup();
   Epplet_unremember();
   exit(0);
   data = NULL;
}

static void
run_contents(void *data)
{
   char *command = Epplet_textbox_contents(textbox);
   int i;

   if(command == NULL)
	   return;

   if(num_commands < MAX_HIST_LEN)
	   command_history[num_commands++] = strdup(command);
   else
   {
	   free(command_history[0]);

	   for(i=0; i < MAX_HIST_LEN; i++)
		   command_history[i] = command_history[i+1];

	   command_history[MAX_HIST_LEN-1] = strdup(command);
   }

   current_command = num_commands;

   Epplet_spawn_command(command);
   Epplet_reset_textbox(textbox);
   return;
   data = NULL;
}

static void
hist_last(void *data)
{
  if (current_command == 0)
    {
      current_command = num_commands;
      Epplet_reset_textbox(textbox);
    }
  else
    {
      Epplet_change_textbox(textbox, command_history[--current_command]);
    }

  return;
  data = NULL;
}

static void
hist_next(void *data)
{
  if (current_command == num_commands - 1)
    {
      current_command++;
      Epplet_reset_textbox(textbox);
      return;
    }
  else if (current_command >= num_commands)
    {
      current_command = 0;
    }
  else
    {
      current_command++;
    }
  Epplet_change_textbox(textbox, command_history[current_command]);

  return;
  data = NULL;
}

int
main(int argc, char *argv[])
{
   atexit(Epplet_cleanup);

   Epplet_Init(EPPLET_NAME, EPPLET_VERSION, EPPLET_INFO, 4, 3, argc, argv, 0);

   Epplet_gadget_show(Epplet_create_button(NULL, NULL, 2, 2,
				 12, 12, "CLOSE", 0, NULL, cb_close, NULL));

   Epplet_gadget_show(Epplet_create_label(18, 2, "E-Exec", 2));

   Epplet_gadget_show(Epplet_create_button(NULL, NULL, 2, 16,
		   12, 12, "ARROW_UP", 0, NULL, hist_last, NULL));

   Epplet_gadget_show(Epplet_create_button(NULL, NULL, 16, 16,
		   12, 12, "ARROW_DOWN", 0, NULL, hist_next, NULL));

   Epplet_gadget_show(Epplet_create_button(NULL, NULL, 44, 16,
			   12, 12, "PLAY", 0, NULL, run_contents, NULL));

   textbox =
      Epplet_create_textbox(NULL, NULL, 2, 32, 60, 14, 2, run_contents, NULL);

   Epplet_gadget_show(textbox);

   Epplet_show();
   Epplet_Loop();
   return 0;
}