195 строки
7.6 KiB
C++
195 строки
7.6 KiB
C++
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org libmime code.
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*
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* The Initial Developer of the Original Code is
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* Ben Bucksch <http://www.bucksch.org/1/projects/mozilla/>.
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* Portions created by the Initial Developer are Copyright (C) 2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* TODO:
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- If you Save As File .html with this mode, you get a total mess.
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- Print is untested (crashes in all modes).
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*/
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/* If you fix a bug here, check, if the same is also in mimethsa, because that
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class is based on this class. */
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#include "mimethpl.h"
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#include "prlog.h"
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#include "msgCore.h"
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#include "mimemoz2.h"
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#include "nsStringGlue.h"
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#include "nsIDocumentEncoder.h" // for output flags
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#define MIME_SUPERCLASS mimeInlineTextPlainClass
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/* I should use the Flowed class as base (because our HTML->TXT converter
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can generate flowed, and we tell it to) - this would get a bit nicer
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rendering. However, that class is more picky about line endings
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and I currently don't feel like splitting up the generated plaintext
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into separate lines again. So, I just throw the whole message at once
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at the TextPlain_parse_line function - it happens to work *g*. */
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MimeDefClass(MimeInlineTextHTMLAsPlaintext, MimeInlineTextHTMLAsPlaintextClass,
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mimeInlineTextHTMLAsPlaintextClass, &MIME_SUPERCLASS);
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static int MimeInlineTextHTMLAsPlaintext_parse_line (const char *, PRInt32,
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MimeObject *);
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static int MimeInlineTextHTMLAsPlaintext_parse_begin (MimeObject *obj);
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static int MimeInlineTextHTMLAsPlaintext_parse_eof (MimeObject *, PRBool);
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static void MimeInlineTextHTMLAsPlaintext_finalize (MimeObject *obj);
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static int
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MimeInlineTextHTMLAsPlaintextClassInitialize(MimeInlineTextHTMLAsPlaintextClass *clazz)
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{
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MimeObjectClass *oclass = (MimeObjectClass *) clazz;
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NS_ASSERTION(!oclass->class_initialized, "problem with superclass");
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oclass->parse_line = MimeInlineTextHTMLAsPlaintext_parse_line;
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oclass->parse_begin = MimeInlineTextHTMLAsPlaintext_parse_begin;
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oclass->parse_eof = MimeInlineTextHTMLAsPlaintext_parse_eof;
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oclass->finalize = MimeInlineTextHTMLAsPlaintext_finalize;
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return 0;
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}
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static int
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MimeInlineTextHTMLAsPlaintext_parse_begin (MimeObject *obj)
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{
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MimeInlineTextHTMLAsPlaintext *textHTMLPlain =
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(MimeInlineTextHTMLAsPlaintext *) obj;
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textHTMLPlain->complete_buffer = new nsString();
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// Let's just hope that libmime won't have the idea to call begin twice...
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return ((MimeObjectClass*)&MIME_SUPERCLASS)->parse_begin(obj);
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}
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static int
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MimeInlineTextHTMLAsPlaintext_parse_eof (MimeObject *obj, PRBool abort_p)
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{
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if (obj->closed_p)
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return 0;
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// This is a hack. We need to call parse_eof() of the super class to flush out any buffered data.
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// We can't call it yet for our direct super class, because it would "close" the output
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// (write tags such as </pre> and </div>). We'll do that after parsing the buffer.
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int status = ((MimeObjectClass*)&MIME_SUPERCLASS)->superclass->parse_eof(obj, abort_p);
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if (status < 0)
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return status;
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MimeInlineTextHTMLAsPlaintext *textHTMLPlain =
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(MimeInlineTextHTMLAsPlaintext *) obj;
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if (!textHTMLPlain || !textHTMLPlain->complete_buffer)
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{
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return 0;
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}
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nsString& cb = *(textHTMLPlain->complete_buffer);
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nsString asPlaintext;
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PRUint32 flags = nsIDocumentEncoder::OutputFormatted
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| nsIDocumentEncoder::OutputWrap
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| nsIDocumentEncoder::OutputFormatFlowed
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| nsIDocumentEncoder::OutputLFLineBreak
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| nsIDocumentEncoder::OutputNoScriptContent
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| nsIDocumentEncoder::OutputNoFramesContent
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| nsIDocumentEncoder::OutputBodyOnly;
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HTML2Plaintext(cb, asPlaintext, flags, 80);
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NS_ConvertUTF16toUTF8 resultCStr(asPlaintext);
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// TODO parse each line independently
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status = ((MimeObjectClass*)&MIME_SUPERCLASS)->parse_line(
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resultCStr.BeginWriting(),
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resultCStr.Length(),
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obj);
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cb.Truncate();
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if (status < 0)
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return status;
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// Second part of the flush hack. Pretend obj wasn't closed yet, so that our super class
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// gets a chance to write the closing.
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PRBool save_closed_p = obj->closed_p;
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obj->closed_p = PR_FALSE;
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status = ((MimeObjectClass*)&MIME_SUPERCLASS)->parse_eof(obj, abort_p);
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// Restore closed_p.
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obj->closed_p = save_closed_p;
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return status;
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}
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void
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MimeInlineTextHTMLAsPlaintext_finalize (MimeObject *obj)
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{
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MimeInlineTextHTMLAsPlaintext *textHTMLPlain =
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(MimeInlineTextHTMLAsPlaintext *) obj;
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if (textHTMLPlain && textHTMLPlain->complete_buffer)
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{
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// If there's content in the buffer, make sure that we output it.
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// don't care about return codes
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obj->clazz->parse_eof(obj, PR_FALSE);
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delete textHTMLPlain->complete_buffer;
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textHTMLPlain->complete_buffer = NULL;
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/* It is important to zero the pointer, so we can reliably check for
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the validity of it in the other functions. See above. */
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}
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((MimeObjectClass*)&MIME_SUPERCLASS)->finalize (obj);
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}
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static int
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MimeInlineTextHTMLAsPlaintext_parse_line (const char *line, PRInt32 length,
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MimeObject *obj)
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{
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MimeInlineTextHTMLAsPlaintext *textHTMLPlain =
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(MimeInlineTextHTMLAsPlaintext *) obj;
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if (!textHTMLPlain || !(textHTMLPlain->complete_buffer))
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{
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#if DEBUG
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printf("Can't output: %s\n", line);
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#endif
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return -1;
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}
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/*
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To convert HTML->TXT syncronously, I need the full source at once,
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not line by line (how do you convert "<li>foo\n" to plaintext?).
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parse_decoded_buffer claims to give me that, but in fact also gives
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me single lines.
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It might be theoretically possible to drive this asyncronously, but
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I don't know, which odd circumstances might arise and how libmime
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will behave then. It's not worth the trouble for me to figure this all out.
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*/
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nsCString linestr(line, length);
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NS_ConvertUTF8toUTF16 line_ucs2(linestr.get());
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if (length && line_ucs2.IsEmpty())
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CopyASCIItoUTF16 (linestr, line_ucs2);
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(textHTMLPlain->complete_buffer)->Append(line_ucs2);
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return 0;
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}
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