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/* -*- 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) 1999
 * 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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 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 * ***** END LICENSE BLOCK ***** */

 * @created  kmcclusk 10/19/99

#ifndef nsIFormProcessor_h__
#define nsIFormProcessor_h__

#include "nsISupports.h"
#include "prtypes.h"

#include "nsIDOMHTMLInputElement.h"

class nsString;
class nsStringArray;

// {0ae53c0f-8ea2-4916-bedc-717443c3e185}
{ 0x0ae53c0f, 0x8ea2, 0x4916, { 0xbe, 0xdc, 0x71, 0x74, 0x43, 0xc3, 0xe1, 0x85 } }

#define NS_FORMPROCESSOR_CONTRACTID "@mozilla.org/layout/form-processor;1"

// 6d4ea1aa-a6b2-43bd-a19d-3f0f26750df3
{ 0x6d4ea1aa, 0xa6b2, 0x43bd, \
 { 0xa1, 0x9d, 0x3f, 0x0f, 0x26, 0x75, 0x0d, 0xf3 } }

// XXX:In the future, we should examine combining this interface with nsIFormSubmitObserver.
// nsIFormSubmitObserver could have a before, during, and after form submission methods.
// The before and after methods would be passed a nsISupports interface. The During would
// Have the same method signature as ProcessValue.

class nsIFormProcessor : public nsISupports {

  /* ProcessValue is called for each name value pair that is 
   * about to be submitted for both "get" and "post" form submissions.
   * The formprocessor is registered as a service that gets called for
   * every form submission.
   *   @param aElement element which the attribute/value pair is submitted for
   *   @param aName    value of the form element name attribute about to be submitted
   *   @param aValue   On entry it contains the value about to be submitted for aName. 
   *                   On exit it contains the value which will actually be submitted for aName.
  NS_IMETHOD ProcessValue(nsIDOMHTMLElement *aElement, 
                          const nsAString& aName,
                          nsAString& aValue) = 0;

  /* Provide content for a form element. This method provides a mechanism to provide 
   * content which comes from a source other than the document (i.e. a local database)
   *   @param aFormType   Type of form to get content for.
   *   @param aOptions    List of nsStrings which define the contents for the form element
   *   @param aAttr       Attribute to be attached to the form element. It is used to identify
   *                      the form element contains non-standard content.

  NS_IMETHOD ProvideContent(const nsAString& aFormType, 
                            nsStringArray& aContent,
                            nsAString& aAttribute) = 0;



#endif /* nsIFormProcessor_h__ */

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