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/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Alexander Surkov <surkov.alexander@gmail.com> (original author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * ***** END LICENSE BLOCK ***** */

#include "nsAccessibilityUtils.h"
#include "nsIDOMXULSelectCntrlEl.h"
#include "nsIDOMXULSelectCntrlItemEl.h"

void
nsAccessibilityUtils::GetAccAttr(nsIPersistentProperties *aAttributes,
                                 nsIAtom *aAttrName,
                                 nsAString& aAttrValue)
{
  nsCAutoString attrName;
  aAttrName->ToUTF8String(attrName);
  aAttributes->GetStringProperty(attrName, aAttrValue);
}

void
nsAccessibilityUtils::SetAccAttr(nsIPersistentProperties *aAttributes,
                                 nsIAtom *aAttrName,
                                 const nsAString& aAttrValue)
{
  nsAutoString oldValue;
  nsCAutoString attrName;

  aAttrName->ToUTF8String(attrName);
  aAttributes->SetStringProperty(attrName, aAttrValue, oldValue);
}

void
nsAccessibilityUtils::GetAccGroupAttrs(nsIPersistentProperties *aAttributes,
                                       PRInt32 *aLevel,
                                       PRInt32 *aPosInSet,
                                       PRInt32 *aSetSize)
{
  *aLevel = 0;
  *aPosInSet = 0;
  *aSetSize = 0;

  nsAutoString value;
  PRInt32 error = NS_OK;

  GetAccAttr(aAttributes, nsAccessibilityAtoms::level, value);
  if (!value.IsEmpty()) {
    PRInt32 level = value.ToInteger(&error);
    if (NS_SUCCEEDED(error))
      *aLevel = level;
  }

  GetAccAttr(aAttributes, nsAccessibilityAtoms::posinset, value);
  if (!value.IsEmpty()) {
    PRInt32 posInSet = value.ToInteger(&error);
    if (NS_SUCCEEDED(error))
      *aPosInSet = posInSet;
  }

  GetAccAttr(aAttributes, nsAccessibilityAtoms::setsize, value);
  if (!value.IsEmpty()) {
    PRInt32 sizeSet = value.ToInteger(&error);
    if (NS_SUCCEEDED(error))
      *aSetSize = sizeSet;
  }
}

PRBool
nsAccessibilityUtils::HasAccGroupAttrs(nsIPersistentProperties *aAttributes)
{
  nsAutoString value;

  GetAccAttr(aAttributes, nsAccessibilityAtoms::setsize, value);
  if (!value.IsEmpty()) {
    GetAccAttr(aAttributes, nsAccessibilityAtoms::posinset, value);
    return !value.IsEmpty();
  }

  return PR_FALSE;
}

void
nsAccessibilityUtils::SetAccGroupAttrs(nsIPersistentProperties *aAttributes,
                                       PRInt32 aLevel,
                                       PRInt32 aPosInSet,
                                       PRInt32 aSetSize)
{
  nsAutoString value;

  if (aLevel) {
    value.AppendInt(aLevel);
    SetAccAttr(aAttributes, nsAccessibilityAtoms::level, value);
  }

  if (aSetSize && aPosInSet) {
    value.Truncate();
    value.AppendInt(aPosInSet);
    SetAccAttr(aAttributes, nsAccessibilityAtoms::posinset, value);

    value.Truncate();
    value.AppendInt(aSetSize);
    SetAccAttr(aAttributes, nsAccessibilityAtoms::setsize, value);
  }
}

void
nsAccessibilityUtils::SetAccAttrsForXULSelectControlItem(nsIDOMNode *aNode,
                                                         nsIPersistentProperties *aAttributes)
{
  nsCOMPtr<nsIDOMXULSelectControlItemElement> item(do_QueryInterface(aNode));
  if (!item)
    return;

  nsCOMPtr<nsIDOMXULSelectControlElement> control;
  item->GetControl(getter_AddRefs(control));
  if (!control)
    return;

  PRUint32 itemsCount;
  control->GetItemCount(&itemsCount);
  PRInt32 indexOf;
  control->GetIndexOfItem(item, &indexOf);

  SetAccGroupAttrs(aAttributes, 0, indexOf + 1, itemsCount);
}
