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/* -*- Mode: C; tab-width: 4; 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
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * 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 ***** */

#ifndef _MIMEMULT_H_
#define _MIMEMULT_H_

#include "mimecont.h"

/* The MimeMultipart class class implements the objects representing all of
   the "multipart/" MIME types.  In addition to the methods inherited from
   MimeContainer, it provides the following methods and class variables:

   int create_child (MimeObject *obj)

     When it has been determined that a new sub-part should be created,
     this method is called to do that.  The default value for this method
     does it in the usual multipart/mixed way.  The headers of the object-
     to-be-created may be found in the `hdrs' slot of the `MimeMultipart'
     object.

   bool output_child_p (MimeObject *parent, MimeObject *child)

     Whether this child should be output.  Default method always says `yes'.

   int parse_child_line (MimeObject *obj, const char *line, PRInt32 length,
             bool first_line_p)

     When we have a line which should be handed off to the currently-active
     child object, this method is called to do that.  The `first_line_p'
     variable will be true only for the very first line handed off to this
     sub-part.  The default method simply passes the line to the most-
   recently-added child object.

   int close_child (MimeObject *self)

     When we reach the end of a sub-part (a separator line) this method is
   called to shut down the currently-active child.  The default method
   simply calls `parse_eof' on the most-recently-added child object.

   MimeMultipartBoundaryType check_boundary (MimeObject *obj,
                      const char *line, PRInt32 length)

     This method is used to examine a line and determine whether it is a
     part boundary, and if so, what kind.  It should return a member of
     the MimeMultipartBoundaryType describing the line.

   const char *default_part_type

     This is the type which should be assumed for sub-parts which have
     no explicit type specified.  The default is "text/plain", but the
     "multipart/digest" subclass overrides this to "message/rfc822".
 */

typedef struct MimeMultipartClass MimeMultipartClass;
typedef struct MimeMultipart      MimeMultipart;

typedef enum {
  MimeMultipartPreamble,
  MimeMultipartHeaders,
  MimeMultipartPartFirstLine,
  MimeMultipartPartLine,
  MimeMultipartEpilogue
} MimeMultipartParseState;

typedef enum {
  MimeMultipartBoundaryTypeNone,
  MimeMultipartBoundaryTypeSeparator,
  MimeMultipartBoundaryTypeTerminator
} MimeMultipartBoundaryType;


struct MimeMultipartClass {
  MimeContainerClass container;
  const char *default_part_type;

  int (*create_child) (MimeObject *);
  bool (*output_child_p) (MimeObject *self, MimeObject *child);
  int (*close_child) (MimeObject *);
  int (*parse_child_line) (MimeObject *, const char *line, PRInt32 length,
               bool first_line_p);
  MimeMultipartBoundaryType (*check_boundary) (MimeObject *, const char *line,
                         PRInt32 length);
};

extern MimeMultipartClass mimeMultipartClass;

struct MimeMultipart {
  MimeContainer container;      /* superclass variables */
  char *boundary;          /* Inter-part delimiter string */
  MimeHeaders *hdrs;        /* headers of the part currently
                     being parsed, if any */
  MimeMultipartParseState state;  /* State of parser */
};

extern void MimeMultipart_notify_emitter(MimeObject *);
#endif /* _MIMEMULT_H_ */