/* entry.c - boot entry
 *
 * Copyright (C) 2007, 2008 Red Hat, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 *
 * Written by: Ray Strode <rstrode@redhat.com>
 */
#include "config.h"

#include <assert.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <math.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <values.h>
#include <unistd.h>
#include <wchar.h>

#include "ply-entry.h"
#include "ply-event-loop.h"
#include "ply-array.h"
#include "ply-label.h"
#include "ply-logger.h"
#include "ply-image.h"
#include "ply-pixel-buffer.h"
#include "ply-pixel-display.h"
#include "ply-utils.h"

#include <linux/kd.h>

#ifndef FRAMES_PER_SECOND
#define FRAMES_PER_SECOND 30
#endif

struct _ply_entry
{
  ply_event_loop_t *loop;

  ply_pixel_display_t     *display;
  ply_rectangle_t          area;
  ply_image_t             *text_field_image;
  ply_image_t             *bullet_image;
  ply_label_t             *label;

  char* text;
  int number_of_bullets;
  int max_number_of_visible_bullets;

  uint32_t is_hidden : 1;
  uint32_t is_password : 1;
};

ply_entry_t *
ply_entry_new (const char *image_dir)
{
  ply_entry_t *entry;
  char *image_path;

  assert (image_dir != NULL);

  entry = calloc (1, sizeof (ply_entry_t));

  image_path = NULL;
  asprintf (&image_path, "%s/entry.png", image_dir);
  entry->text_field_image = ply_image_new (image_path);
  free (image_path);

  image_path = NULL;
  asprintf (&image_path, "%s/bullet.png", image_dir);
  entry->bullet_image = ply_image_new (image_path);
  free (image_path);
  entry->label = ply_label_new ();

  entry->number_of_bullets = 0;
  entry->text = strdup("");
  
  entry->is_hidden = true;
  entry->is_password = true;

  return entry;
}

void
ply_entry_free (ply_entry_t *entry)
{
  if (entry == NULL)
    return;
  ply_image_free (entry->text_field_image);
  ply_image_free (entry->bullet_image);
  ply_label_free (entry->label);
  free (entry->text);

  free (entry);
}

static int
get_max_number_of_visible_bullets (ply_entry_t *entry)
{
  long bullet_width, text_field_width;

  bullet_width = ply_image_get_width (entry->bullet_image);
  text_field_width = ply_image_get_width (entry->text_field_image);

  return (int) (text_field_width / bullet_width) - ((text_field_width % bullet_width) < (bullet_width / 2)? 1 : 0);
}

bool
ply_entry_load (ply_entry_t *entry)
{

  if (!ply_image_load (entry->text_field_image))
    return false;

  if (!ply_image_load (entry->bullet_image))
    return false;

  entry->area.width = ply_image_get_width (entry->text_field_image);
  entry->area.height = ply_image_get_height (entry->text_field_image);

  entry->max_number_of_visible_bullets = get_max_number_of_visible_bullets (entry);

  return true;
}

static void
ply_entry_draw (ply_entry_t *entry)
{
  ply_pixel_display_draw_area (entry->display,
                               entry->area.x,
                               entry->area.y,
                               entry->area.width,
                               entry->area.height);
}

void
ply_entry_draw_area (ply_entry_t        *entry,
                     ply_pixel_buffer_t *pixel_buffer,
                     long                x,
                     long                y,
                     unsigned long       width,
                     unsigned long       height)
{
  ply_rectangle_t     bullet_area;
  uint32_t *text_field_data, *bullet_data;
  int i, number_of_visible_bullets;

  if (entry->is_hidden)
    return;

  text_field_data = ply_image_get_data (entry->text_field_image);

  ply_pixel_buffer_fill_with_argb32_data (pixel_buffer,
                                          &entry->area, 0, 0,
                                          text_field_data);

  if (entry->is_password)
    {
      bullet_data = ply_image_get_data (entry->bullet_image);
      bullet_area.width = ply_image_get_width (entry->bullet_image);
      bullet_area.height = ply_image_get_height (entry->bullet_image);

      if (entry->number_of_bullets < entry->max_number_of_visible_bullets)
        number_of_visible_bullets = entry->number_of_bullets;
      else
        {
          number_of_visible_bullets = entry->max_number_of_visible_bullets;

          /* We've got more bullets than we can show in the available space, so
           * draw a little half bullet to indicate some bullets are offscreen
           */
          bullet_area.x = entry->area.x;
          bullet_area.y = entry->area.y + entry->area.height / 2.0 - bullet_area.height / 2.0;

          ply_pixel_buffer_fill_with_argb32_data (pixel_buffer,
                                                  &bullet_area, bullet_area.width / 2.0, 0,
                                                  bullet_data);
        }

      for (i = 0; i < number_of_visible_bullets; i++)
        {
          bullet_area.x = entry->area.x + i * bullet_area.width + bullet_area.width / 2.0;
          bullet_area.y = entry->area.y + entry->area.height / 2.0 - bullet_area.height / 2.0;

          ply_pixel_buffer_fill_with_argb32_data (pixel_buffer,
                                                  &bullet_area, 0, 0,
                                                  bullet_data);
        }
    }
  else
    {
      ply_label_set_text (entry->label, entry->text);
      ply_label_draw_area (entry->label, pixel_buffer,
                           entry->area.x, entry->area.y,
                           entry->area.width, entry->area.height);
    }
}

void
ply_entry_set_bullet_count (ply_entry_t *entry, int count)
{
  count = MAX(0, count);
  if (!entry->is_password || entry->number_of_bullets != count)
    {
      entry->is_password = true;
      entry->number_of_bullets = count;
      ply_entry_draw (entry);
    }
}

int
ply_entry_get_bullet_count (ply_entry_t *entry)
{
  return entry->number_of_bullets;
}

void
ply_entry_add_bullet (ply_entry_t *entry)
{
  ply_entry_set_bullet_count (entry, ply_entry_get_bullet_count (entry)+1);
}

void
ply_entry_remove_bullet (ply_entry_t *entry)
{
  ply_entry_set_bullet_count (entry, ply_entry_get_bullet_count (entry)-1);
}

void
ply_entry_remove_all_bullets (ply_entry_t *entry)
{
  ply_entry_set_bullet_count (entry, 0);
}

void
ply_entry_set_text (ply_entry_t *entry, const char* text)
{
  if (entry->is_password || strcmp(entry->text, text) != 0)
    {
      entry->is_password = false;
      free(entry->text);
      entry->text = strdup(text);
      ply_entry_draw (entry);
    }
}

void
ply_entry_show (ply_entry_t         *entry,
                ply_event_loop_t    *loop,
                ply_pixel_display_t *display,
                long                  x,
                long                  y)
{
  assert (entry != NULL);
  assert (entry->loop == NULL);

  entry->loop = loop;
  entry->display = display;

  entry->area.x = x;
  entry->area.y = y;

  entry->is_hidden = false;

  ply_entry_draw (entry);
}

void
ply_entry_hide (ply_entry_t *entry)
{
  entry->is_hidden = true;
  ply_entry_draw (entry);

  entry->display = NULL;
  entry->loop = NULL;
}

bool
ply_entry_is_hidden (ply_entry_t *entry)
{
  return entry->is_hidden;
}

long
ply_entry_get_width (ply_entry_t *entry)
{
  return entry->area.width;
}

long
ply_entry_get_height (ply_entry_t *entry)
{
  return entry->area.height;
}

/* vim: set ts=4 sw=4 expandtab autoindent cindent cino={.5s,(0: */