/* GTK - The GIMP Toolkit
 * Copyright (C) 2011 Red Hat, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 */

#include "config.h"

#include "gtkcssarrayvalueprivate.h"

#include <string.h>

struct _GtkCssValue {
  GTK_CSS_VALUE_BASE
  guint         n_values;
  GtkCssValue  *values[1];
};

static void
gtk_css_value_array_free (GtkCssValue *value)
{
  guint i;

  for (i = 0; i < value->n_values; i++)
    {
      _gtk_css_value_unref (value->values[i]);
    }

  g_slice_free1 (sizeof (GtkCssValue) + sizeof (GtkCssValue *) * (value->n_values - 1), value);
}

static gboolean
gtk_css_value_array_equal (const GtkCssValue *value1,
                           const GtkCssValue *value2)
{
  guint i;

  if (value1->n_values != value2->n_values)
    return FALSE;

  for (i = 0; i < value1->n_values; i++)
    {
      if (!_gtk_css_value_equal (value1->values[i],
                                 value2->values[i]))
        return FALSE;
    }

  return TRUE;
}

static void
gtk_css_value_array_print (const GtkCssValue *value,
                           GString           *string)
{
  guint i;

  if (value->n_values == 0)
    {
      g_string_append (string, "none");
      return;
    }

  for (i = 0; i < value->n_values; i++)
    {
      if (i > 0)
        g_string_append (string, ", ");
      _gtk_css_value_print (value->values[i], string);
    }
}

static const GtkCssValueClass GTK_CSS_VALUE_ARRAY = {
  gtk_css_value_array_free,
  gtk_css_value_array_equal,
  gtk_css_value_array_print
};

GtkCssValue *
_gtk_css_array_value_new (GtkCssValue **values,
                          guint         n_values)
{
  GtkCssValue *result;
  
  g_return_val_if_fail (values != NULL || n_values == 0, NULL);

  result = _gtk_css_value_alloc (&GTK_CSS_VALUE_ARRAY, sizeof (GtkCssValue) + sizeof (GtkCssValue *) * (MAX (1, n_values) - 1));
  result->n_values = n_values;
  memcpy (&result->values[0], values, sizeof (GtkCssValue *) * n_values);

  return result;
}

GtkCssValue *
_gtk_css_array_value_get_nth (const GtkCssValue *value,
                              guint              i)
{
  g_return_val_if_fail (value != NULL, NULL);
  g_return_val_if_fail (value->class == &GTK_CSS_VALUE_ARRAY, NULL);
  g_return_val_if_fail (value->n_values > 0, NULL);

  return value->values[i % value->n_values];
}

guint
_gtk_css_array_value_get_n_values (const GtkCssValue *value)
{
  g_return_val_if_fail (value != NULL, 0);
  g_return_val_if_fail (value->class == &GTK_CSS_VALUE_ARRAY, 0);

  return value->n_values;
}