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83 lines
3.1 KiB
C
83 lines
3.1 KiB
C
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/* mimetext.h --- definition of the MimeInlineText class (see mimei.h)
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Created: Jamie Zawinski <jwz@netscape.com>, 15-May-96.
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*/
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#ifndef _MIMETEXT_H_
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#define _MIMETEXT_H_
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#include "mimeleaf.h"
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/* The MimeInlineText class is the superclass of all handlers for the
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MIME text/ content types (which convert various text formats to HTML,
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in one form or another.)
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It provides two services:
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= if ROT13 decoding is desired, the text will be rotated before
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the `parse_line' method it called;
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= text will be converted from the message's charset to the "target"
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charset before the `parse_line' method is called.
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The contract with charset-conversion is that the converted data will
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be such that one may interpret any octets (8-bit bytes) in the data
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which are in the range of the ASCII characters (0-127) as ASCII
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characters. It is explicitly legal, for example, to scan through
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the string for "<" and replace it with "<", and to search for things
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that look like URLs and to wrap them with interesting HTML tags.
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The charset to which we convert will probably be UTF-8 (an encoding of
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the Unicode character set, with the feature that all octets with the
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high bit off have the same interpretations as ASCII.)
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#### NOTE: if it turns out that we use JIS (ISO-2022-JP) as the target
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encoding, then this is not quite true; it is safe to search for the
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low ASCII values (under hex 0x40, octal 0100, which is '@') but it
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is NOT safe to search for values higher than that -- they may be
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being used as the subsequent bytes in a multi-byte escape sequence.
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It's a nice coincidence that HTML's critical characters ("<", ">",
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and "&") have values under 0x40...
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*/
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typedef struct MimeInlineTextClass MimeInlineTextClass;
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typedef struct MimeInlineText MimeInlineText;
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struct MimeInlineTextClass {
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MimeLeafClass leaf;
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int (*rot13_line) (MimeObject *obj, char *line, int32 length);
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int (*convert_line_charset) (MimeObject *obj, char *line, int32 length);
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};
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extern MimeInlineTextClass mimeInlineTextClass;
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struct MimeInlineText {
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MimeLeaf leaf; /* superclass variables */
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char *charset; /* The charset from the content-type of this
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object, or the caller-specified overrides
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or defaults.
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*/
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char *cbuffer; /* Buffer used for charset conversion. */
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int32 cbuffer_size;
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};
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#endif /* _MIMETEXT_H_ */
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