mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-13 23:17:57 +00:00
203 lines
7.9 KiB
C
203 lines
7.9 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* The contents of this file are subject to the Netscape Public License
|
|
* Version 1.0 (the "NPL"); you may not use this file except in
|
|
* compliance with the NPL. You may obtain a copy of the NPL at
|
|
* http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the NPL is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
|
|
* for the specific language governing rights and limitations under the
|
|
* NPL.
|
|
*
|
|
* The Initial Developer of this code under the NPL is Netscape
|
|
* Communications Corporation. Portions created by Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
|
|
* Reserved.
|
|
*/
|
|
|
|
/* mimeobj.h --- definition of the MimeObject class (see mimei.h)
|
|
Created: Jamie Zawinski <jwz@netscape.com>, 15-May-96.
|
|
*/
|
|
|
|
#ifndef _MIMEOBJ_H_
|
|
#define _MIMEOBJ_H_
|
|
|
|
#include "mimei.h"
|
|
#include "xp_linebuf.h"
|
|
|
|
|
|
/* MimeObject is the base-class for the objects representing all other
|
|
MIME types. It provides several methods:
|
|
|
|
int initialize (MimeObject *obj)
|
|
|
|
This is called from mime_new() when a new instance is allocated.
|
|
Subclasses should do whatever setup is necessary from this method,
|
|
and should call the superclass's initialize method, unless there's
|
|
a specific reason not to.
|
|
|
|
void finalize (MimeObject *obj)
|
|
|
|
This is called from mime_free() and should free all data associated
|
|
with the object. If the object points to other MIME objects, they
|
|
should be finalized as well (by calling mime_free(), not by calling
|
|
their finalize() methods directly.)
|
|
|
|
int parse_buffer (char *buf, int32 size, MimeObject *obj)
|
|
|
|
This is the method by which you feed arbitrary data into the parser
|
|
for this object. Most subclasses will probably inherit this method
|
|
from the MimeObject base-class, which line-buffers the data and then
|
|
hands it off to the parse_line() method.
|
|
|
|
If this object uses a Content-Transfer-Encoding (base64, qp, uue)
|
|
then the data may be decoded by parse_buffer() before parse_line()
|
|
is called. (The MimeLeaf class provides this functionality.)
|
|
|
|
int parse_begin (MimeObject *obj)
|
|
Called after `init' but before `parse_line' or `parse_buffer'.
|
|
Can be used to initialize various parsing machinery.
|
|
|
|
int parse_line (char *line, int32 length, MimeObject *obj)
|
|
|
|
This method is called (by parse_buffer()) for each complete line of
|
|
data handed to the parser, and is the method which most subclasses
|
|
will override to implement their parsers.
|
|
|
|
When handing data off to a MIME object for parsing, one should always
|
|
call the parse_buffer() method, and not call the parse_line() method
|
|
directly, since the parse_buffer() method may do other transformations
|
|
on the data (like base64 decoding.)
|
|
|
|
One should generally not call parse_line() directly, since that could
|
|
bypass decoding. One should call parse_buffer() instead.
|
|
|
|
int parse_eof (MimeObject *obj, XP_Bool abort_p)
|
|
|
|
This is called when there is no more data to be handed to the object:
|
|
when the parent object is done feeding data to an object being parsed.
|
|
Implementors of this method should be sure to also call the parse_eof()
|
|
methods of any sub-objects to which they have pointers.
|
|
|
|
This is also called by the finalize() method, just before object
|
|
destruction, if it has not already been called.
|
|
|
|
The `closed_p' instance variable is used to prevent multiple calls to
|
|
`parse_eof'.
|
|
|
|
int parse_end (MimeObject *obj)
|
|
Called after `parse_eof' but before `finalize'.
|
|
This can be used to free up any memory no longer needed now that parsing
|
|
is done (to avoid surprises due to unexpected method combination, it's
|
|
best to free things in this method in preference to `parse_eof'.)
|
|
Implementors of this method should be sure to also call the parse_end()
|
|
methods of any sub-objects to which they have pointers.
|
|
|
|
This is also called by the finalize() method, just before object
|
|
destruction, if it has not already been called.
|
|
|
|
The `parsed_p' instance variable is used to prevent multiple calls to
|
|
`parse_end'.
|
|
|
|
|
|
XP_Bool displayable_inline_p (MimeObjectClass *class, MimeHeaders *hdrs)
|
|
|
|
This method should return true if this class of object will be displayed
|
|
directly, as opposed to being displayed as a link. This information is
|
|
used by the "multipart/alternative" parser to decide which of its children
|
|
is the ``best'' one to display. Note that this is a class method, not
|
|
an object method -- there is not yet an instance of this class at the time
|
|
that it is called. The `hdrs' provided are the headers of the object that
|
|
might be instantiated -- from this, the method may extract additional
|
|
infomation that it might need to make its decision.
|
|
*/
|
|
|
|
|
|
/* this one is typdedef'ed in mimei.h, since it is the base-class. */
|
|
struct MimeObjectClass {
|
|
|
|
/* Note: the order of these first five slots is known by MimeDefClass().
|
|
Technically, these are part of the object system, not the MIME code.
|
|
*/
|
|
const char *class_name;
|
|
int instance_size;
|
|
struct MimeObjectClass *superclass;
|
|
int (*class_initialize) (MimeObjectClass *class);
|
|
XP_Bool class_initialized;
|
|
XP_Bool showAttachmentIcon;
|
|
|
|
/* These are the methods shared by all MIME objects. See comment above.
|
|
*/
|
|
int (*initialize) (MimeObject *obj);
|
|
void (*finalize) (MimeObject *obj);
|
|
int (*parse_begin) (MimeObject *obj);
|
|
int (*parse_buffer) (char *buf, int32 size, MimeObject *obj);
|
|
int (*parse_line) (char *line, int32 length, MimeObject *obj);
|
|
int (*parse_eof) (MimeObject *obj, XP_Bool abort_p);
|
|
int (*parse_end) (MimeObject *obj, XP_Bool abort_p);
|
|
|
|
XP_Bool (*displayable_inline_p) (MimeObjectClass *class, MimeHeaders *hdrs);
|
|
|
|
#if defined(DEBUG) && defined(XP_UNIX)
|
|
int (*debug_print) (MimeObject *obj, FILE *stream, int32 depth);
|
|
#endif
|
|
};
|
|
|
|
extern MimeObjectClass mimeObjectClass;
|
|
|
|
/* this one is typdedef'ed in mimei.h, since it is the base-class. */
|
|
struct MimeObject {
|
|
MimeObjectClass *class; /* Pointer to class object, for `type-of' */
|
|
|
|
MimeHeaders *headers; /* The header data associated with this object;
|
|
this is where the content-type, disposition,
|
|
description, and other meta-data live.
|
|
|
|
For example, the outermost message/rfc822 object
|
|
would have NULL here (since it has no parent,
|
|
thus no headers to describe it.) However, a
|
|
multipart/mixed object, which was the sole
|
|
child of that message/rfc822 object, would have
|
|
here a copy of the headers which began the
|
|
parent object (the headers which describe the
|
|
child.)
|
|
*/
|
|
|
|
char *content_type; /* The MIME content-type and encoding. */
|
|
char *encoding; /* In most cases, these will be the same as the
|
|
values to be found in the `headers' object,
|
|
but in some cases, the values in these slots
|
|
will be more correct than the headers.
|
|
*/
|
|
|
|
|
|
MimeObject *parent; /* Backpointer to a MimeContainer object. */
|
|
|
|
MimeDisplayOptions *options; /* Display preferences set by caller. */
|
|
|
|
XP_Bool closed_p; /* Whether it's done being written to. */
|
|
XP_Bool parsed_p; /* Whether the parser has been shut down. */
|
|
XP_Bool output_p; /* Whether it should be written. */
|
|
|
|
/* Read-buffer and write-buffer (on input, `parse_buffer' uses ibuffer to
|
|
compose calls to `parse_line'; on output, `obuffer' is used in various
|
|
ways by various routines.) These buffers are created and grow as needed.
|
|
`ibuffer' should be generally be considered hands-off, and `obuffer'
|
|
should generally be considered fair game.
|
|
*/
|
|
char *ibuffer, *obuffer;
|
|
uint32 ibuffer_size, obuffer_size;
|
|
uint32 ibuffer_fp, obuffer_fp;
|
|
};
|
|
|
|
|
|
#define MimeObject_grow_obuffer(obj, desired_size) \
|
|
(((desired_size) >= (obj)->obuffer_size) ? \
|
|
XP_GrowBuffer ((desired_size), sizeof(char), 1024, \
|
|
&(obj)->obuffer, &(obj)->obuffer_size) \
|
|
: 0)
|
|
|
|
|
|
#endif /* _MIMEOBJ_H_ */
|