/*
 * Copyright (c) 2004, Swedish Institute of Computer Science.
 * All rights reserved. 
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in the 
 *    documentation and/or other materials provided with the distribution. 
 * 3. Neither the name of the Institute nor the names of its contributors 
 *    may be used to endorse or promote products derived from this software 
 *    without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE. 
 *
 * This file is part of the Contiki operating system.
 * 
 * Author: Adam Dunkels <adam@sics.se>
 *
 * $Id: ctk-filedialog.c,v 1.5 2005/05/08 10:40:10 oliverschmidt Exp $
 */

#include "contiki.h"
#include "ctk-filedialog.h"
#include "ctk.h"
#include "cfs.h"

#include <string.h>

#define MAX_NUMFILES 40
#define FILES_WIDTH 17
#define FILES_HEIGHT 14

static struct ctk_window dialog;
static char leftptr[FILES_HEIGHT];
static struct ctk_label leftptrlabel =
  {CTK_LABEL(0, 1, 1, FILES_HEIGHT, leftptr)};

static char files[FILES_WIDTH * MAX_NUMFILES];
static struct ctk_label fileslabel =
  {CTK_LABEL(1, 1,
	     FILES_WIDTH, FILES_HEIGHT, files)};

static char rightptr[FILES_HEIGHT];
static struct ctk_label rightptrlabel =
  {CTK_LABEL(1 + FILES_WIDTH, 1, 1, FILES_HEIGHT, rightptr)};

static char filename[FILES_WIDTH + 1];
static struct ctk_textentry filenameentry =
  {CTK_TEXTENTRY(1, 2 + FILES_HEIGHT, FILES_WIDTH, 1, filename,
		 FILES_WIDTH)};

static struct ctk_button button;

#define STATE_CLOSED 0
#define STATE_OPEN 1
static char state = STATE_CLOSED;
static unsigned char fileptr, dirfileptr;
static struct cfs_dir dir;
/*---------------------------------------------------------------------------*/
static void
clearptr(void)
{
  leftptr[fileptr] = ' ';
  rightptr[fileptr] = ' '; 
}
/*---------------------------------------------------------------------------*/
static void
showptr(void)
{
  leftptr[fileptr] = '>';
  rightptr[fileptr] = '<';

  strncpy(filename,
	  &files[fileptr * FILES_WIDTH],
	  FILES_WIDTH);
  
  CTK_WIDGET_REDRAW(&filenameentry);
  CTK_WIDGET_REDRAW(&leftptrlabel);
  CTK_WIDGET_REDRAW(&rightptrlabel);
}
/*---------------------------------------------------------------------------*/
void
ctk_filedialog_init(register struct ctk_filedialog_state *s)
{
  state = STATE_CLOSED;
}
/*---------------------------------------------------------------------------*/
void
ctk_filedialog_open(register struct ctk_filedialog_state *s,
		    const char *buttontext, ek_event_t event)
{
  ctk_dialog_new(&dialog, 20, 5 + FILES_HEIGHT);
  CTK_WIDGET_ADD(&dialog, &leftptrlabel);
  CTK_WIDGET_ADD(&dialog, &fileslabel);
  CTK_WIDGET_ADD(&dialog, &rightptrlabel);
  CTK_WIDGET_ADD(&dialog, &filenameentry);
  CTK_BUTTON_NEW(&button, 1, 4 + FILES_HEIGHT, strlen(buttontext), (char *)buttontext);
  CTK_WIDGET_ADD(&dialog, &button);
  ctk_dialog_open(&dialog);
  state = STATE_OPEN;
  memset(filename, 0, sizeof(filename));
  memset(leftptr, ' ', sizeof(leftptr));
  memset(rightptr, ' ', sizeof(rightptr));
  memset(files, 0, sizeof(files));
  
  fileptr = 0;
  dirfileptr = 0;
  showptr();
  cfs_opendir(&dir, ".");
  ek_post(EK_PROC_ID(EK_CURRENT()), EK_EVENT_CONTINUE, s);
}
/*---------------------------------------------------------------------------*/
char
ctk_filedialog_eventhandler(struct ctk_filedialog_state *s,
			    ek_event_t ev, ek_data_t data)
{
  static struct cfs_dirent dirent;
  
  if(state == STATE_OPEN) {
    if(ev == ctk_signal_widget_activate &&
       data == (ek_data_t)&button) {
      ctk_dialog_close();
      state = STATE_CLOSED;
      ek_post(EK_PROC_ID(EK_CURRENT()), s->ev, &filename);
      return 1;
    } else if(ev == EK_EVENT_CONTINUE &&
	      (ek_data_t)s == data) {
      if(cfs_readdir(&dir, &dirent) == 0 &&
	 dirfileptr < MAX_NUMFILES) {
	strncpy(&files[dirfileptr * FILES_WIDTH],
		dirent.name, FILES_WIDTH);
	CTK_WIDGET_REDRAW(&fileslabel);
	++dirfileptr;
	ek_post(EK_PROC_ID(EK_CURRENT()), EK_EVENT_CONTINUE, s);
      } else {
	fileptr = 0;	
	cfs_closedir(&dir);
      }
      return 1; 
    } else if(ev == ctk_signal_keypress) {
      if((ctk_arch_key_t)data == CH_CURS_UP) {
	clearptr();
	if(fileptr > 0) {
	  --fileptr;
	}
	showptr();
	return 1;
      } else if((ctk_arch_key_t)data == CH_CURS_DOWN) {
	clearptr();
	if(fileptr < FILES_HEIGHT - 1) {
	  ++fileptr;
	}
	showptr();
	return 1;
      }
    }
  }
  return 0;
}
/*---------------------------------------------------------------------------*/