netscape-revival

lib/libmime2/mimethtm.c

/* -*- Mode: C; tab-width: 4 -*-
   mimethtm.c --- definition of the MimeInlineTextHTML class (see mimei.h)
   Copyright © 1997 Netscape Communications Corporation, all rights reserved.
   Created: Jamie Zawinski <jwz@netscape.com>, 15-May-96.
 */

#include "mimethtm.h"

#define MIME_SUPERCLASS mimeInlineTextClass
MimeDefClass(MimeInlineTextHTML, MimeInlineTextHTMLClass,
			 mimeInlineTextHTMLClass, &MIME_SUPERCLASS);

static int MimeInlineTextHTML_parse_line (char *, int32, MimeObject *);
static int MimeInlineTextHTML_parse_eof (MimeObject *, XP_Bool);
static int MimeInlineTextHTML_parse_begin (MimeObject *obj);

static int
MimeInlineTextHTMLClassInitialize(MimeInlineTextHTMLClass *class)
{
  MimeObjectClass *oclass = (MimeObjectClass *) class;
  XP_ASSERT(!oclass->class_initialized);
  oclass->parse_begin = MimeInlineTextHTML_parse_begin;
  oclass->parse_line  = MimeInlineTextHTML_parse_line;
  oclass->parse_eof   = MimeInlineTextHTML_parse_eof;

  return 0;
}

#ifndef AKBAR
static char start_ilayer[] = "<ILAYER CLIP=0,0,AUTO,AUTO>";
#endif /* AKBAR */

static int
MimeInlineTextHTML_parse_begin (MimeObject *obj)
{
  int status = ((MimeObjectClass*)&mimeLeafClass)->parse_begin(obj);
  if (status < 0) return status;

  if (!obj->output_p) return 0;

#ifdef MIME_LEAF_TEXT
  /* If we're extracting leaves, shouldn't have made this class. */
  XP_ASSERT(!obj->options || !obj->options->write_leaf_p);
#endif /* MIME_LEAF_TEXT */

  /* If this HTML part has a Content-Base header, and if we're displaying
	 to the screen (that is, not writing this part "raw") then translate
	 that Content-Base header into a <BASE> tag in the HTML.
   */
#ifdef MIME_TO_HTML
  if (obj->options &&
	  obj->options->write_html_p &&
	  obj->options->output_fn)
	{
	  char *base_hdr = MimeHeaders_get (obj->headers, HEADER_CONTENT_BASE,
										FALSE, FALSE);
#ifdef MIME_TO_HTML
#ifndef AKBAR
      /* Encapsulate the entire text/html part inside an in-flow
         layer.  This will provide it a private coordinate system and
         prevent it from escaping the bounds of its clipping so that
         it might, for example, spoof a mail header. */
      status = MimeObject_write(obj, start_ilayer, sizeof start_ilayer, TRUE);
      if (status < 0) return status;
#endif /* AKBAR */
#endif /* MIME_TO_HTML */

	  if (base_hdr)
		{
		  char *buf = (char *) XP_ALLOC(XP_STRLEN(base_hdr) + 20);
		  const char *in;
		  char *out;
		  if (!buf)
			return MK_OUT_OF_MEMORY;

		  /* The value of the Content-Base header is a number of "words".
			 Whitespace in this header is not significant -- it is assumed
			 that any real whitespace in the URL has already been encoded,
			 and whitespace has been inserted to allow the lines in the
			 mail header to be wrapped reasonably.  Creators are supposed
			 to insert whitespace every 40 characters or less.
		   */
		  XP_STRCPY(buf, "<BASE HREF=\"");
		  out = buf + XP_STRLEN(buf);

		  for (in = base_hdr; *in; in++)
			/* ignore whitespace and quotes */
			if (!XP_IS_SPACE(*in) && *in != '"')
			  *out++ = *in;

		  /* Close the tag and argument. */
		  *out++ = '"';
		  *out++ = '>';
		  *out++ = 0;

		  XP_FREE(base_hdr);

		  status = MimeObject_write(obj, buf, XP_STRLEN(buf), FALSE);
		  XP_FREE(buf);
		  if (status < 0) return status;
		}
	}
#endif /* MIME_TO_HTML */

  return 0;
}


static int
MimeInlineTextHTML_parse_line (char *line, int32 length, MimeObject *obj)
{
  if (!obj->output_p) return 0;

  if (obj->options && obj->options->output_fn)
	return MimeObject_write(obj, line, length, TRUE);
  else
	return 0;
}

#ifndef AKBAR
static char end_ilayer[] = "</ILAYER>";
#endif /* AKBAR */


/* This method is the same as that of MimeInlineTextRichtext (and thus
   MimeInlineTextEnriched); maybe that means that MimeInlineTextHTML
   should share a common parent with them which is not also shared by
   MimeInlineTextPlain?
 */
static int
MimeInlineTextHTML_parse_eof (MimeObject *obj, XP_Bool abort_p)
{
  int status;
  if (obj->closed_p) return 0;

  /* Run parent method first, to flush out any buffered data. */
  status = ((MimeObjectClass*)&MIME_SUPERCLASS)->parse_eof(obj, abort_p);
  if (status < 0) return status;

#ifdef MIME_TO_HTML
  if (obj->output_p &&
	  obj->options &&
	  obj->options->write_html_p &&
	  obj->options->reset_html_state_fn)
	{
        status = obj->options->reset_html_state_fn(obj->options->stream_closure,
                                                   abort_p);
        if (status < 0) return status;
#ifndef AKBAR
        /* Close the in-flow layer that surrounds this entire part */
        status = MimeObject_write(obj, end_ilayer, sizeof end_ilayer, FALSE);
        if (status < 0) return status;
#endif /* AKBAR */
	}
#endif /* MIME_TO_HTML */

  return 0;
}