/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * 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
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * 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
 * of those above. If you wish to allow use of your version of this file only
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 * ***** END LICENSE BLOCK ***** */
#ifndef nsIForm_h___
#define nsIForm_h___

#include "nsISupports.h"
#include "nsAString.h"

class nsIFormControl;
class nsISimpleEnumerator;
class nsIURI;

#define NS_FORM_METHOD_GET  0
#define NS_FORM_METHOD_POST 1
#define NS_FORM_ENCTYPE_URLENCODED 0
#define NS_FORM_ENCTYPE_MULTIPART  1
#define NS_FORM_ENCTYPE_TEXTPLAIN  2

// IID for the nsIForm interface
#define NS_IFORM_IID    \
{ 0x27f1ff6c, 0xeb78, 0x405b, \
 { 0xa6, 0xeb, 0xf0, 0xce, 0xa8, 0x30, 0x85, 0x58 } }

/**
 * This interface provides some methods that can be used to access the
 * guts of a form.  It's being slowly phased out.
 */

class nsIForm : public nsISupports
{
public:
  NS_DECLARE_STATIC_IID_ACCESSOR(NS_IFORM_IID)

  /**
   * Get the element at a specified index position in form.elements
   *
   * @param aIndex the index
   * @param aElement the element at that index
   * @return NS_OK if there was an element at that position, -1 otherwise
   */
  NS_IMETHOD_(nsIFormControl*) GetElementAt(PRInt32 aIndex) const = 0;

  /**
   * Get the number of elements in form.elements
   *
   * @param aCount the number of elements
   * @return NS_OK if there was an element at that position, -1 otherwise
   */
  NS_IMETHOD_(PRUint32) GetElementCount() const = 0;

  /**
   * Resolve a name in the scope of the form object, this means find
   * form controls in this form with the correct value in the name
   * attribute.
   *
   * @param aElement the element to remove
   * @param aName the name or id of the element to remove
   * @return NS_OK if the element was successfully removed.
   */
  NS_IMETHOD_(already_AddRefed<nsISupports>) ResolveName(const nsAString& aName) = 0;

  /**
   * Get the index of the given control within form.elements.
   * @param aControl the control to find the index of
   * @param aIndex the index [OUT]
   */
  NS_IMETHOD_(PRInt32) IndexOfControl(nsIFormControl* aControl) = 0;

  /**
   * Get the default submit element. If there's no default submit element,
   * return null.
   */
   NS_IMETHOD_(nsIFormControl*) GetDefaultSubmitElement() const = 0;
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsIForm, NS_IFORM_IID)

#endif /* nsIForm_h___ */
