/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *		Michael Zucchi <notzed@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <ctype.h>

#include <gtk/gtk.h>
#ifdef G_OS_WIN32
/* Work around 'DATADIR' and 'interface' lossage in <windows.h> */
#define DATADIR crap_DATADIR
#include <windows.h>
#undef DATADIR
#undef interface
#endif

#include <libebackend/e-extensible.h>
#include <libedataserver/e-time-utils.h>
#include <libedataserver/e-data-server-util.h>	/* for e_utf8_strftime, what about e_time_format_time? */

#include "e-util/e-datetime-format.h"
#include "e-util/e-icon-factory.h"
#include "e-util/e-util-private.h"
#include "e-util/e-util.h"
#include "misc/e-web-view.h"

#include <shell/e-shell.h>

#include <gtkhtml/gtkhtml.h>
#include <gtkhtml/gtkhtml-stream.h>

#include <glib/gi18n.h>

#include <libemail-utils/mail-mt.h>

#include <libemail-engine/e-mail-enumtypes.h>
#include <libemail-engine/e-mail-utils.h>
#include <libemail-engine/mail-config.h>

#include "em-format-html.h"
#include "em-html-stream.h"
#include "em-utils.h"

#define EM_FORMAT_HTML_GET_PRIVATE(obj) \
	(G_TYPE_INSTANCE_GET_PRIVATE \
	((obj), EM_TYPE_FORMAT_HTML, EMFormatHTMLPrivate))

#define d(x)

#define EM_FORMAT_HTML_GET_PRIVATE(obj) \
	(G_TYPE_INSTANCE_GET_PRIVATE \
	((obj), EM_TYPE_FORMAT_HTML, EMFormatHTMLPrivate))

#define EFM_MESSAGE_START_ANAME "evolution#message#start"
#define EFH_MESSAGE_START "<A name=\"" EFM_MESSAGE_START_ANAME "\"></A>"

struct _EMFormatHTMLCache {
	CamelMultipart *textmp;

	gchar partid[1];
};

struct _EMFormatHTMLPrivate {
	EWebView *web_view;

	CamelMimeMessage *last_part;	/* not reffed, DO NOT dereference */
	volatile gint format_id;		/* format thread id */
	guint format_timeout_id;
	struct _format_msg *format_timeout_msg;

	/* Table that re-maps text parts into a mutlipart/mixed, EMFormatHTMLCache * */
	GHashTable *text_inline_parts;

	GQueue pending_jobs;
	GMutex *lock;

	GdkColor colors[EM_FORMAT_HTML_NUM_COLOR_TYPES];
	EMailImageLoadingPolicy image_loading_policy;

	EMFormatHTMLHeadersState headers_state;
	gboolean headers_collapsable;

	guint load_images_now	: 1;
	guint only_local_photos	: 1;
	guint show_sender_photo	: 1;
	guint show_real_date	: 1;
};

enum {
	PROP_0,
	PROP_BODY_COLOR,
	PROP_CITATION_COLOR,
	PROP_CONTENT_COLOR,
	PROP_FRAME_COLOR,
	PROP_HEADER_COLOR,
	PROP_IMAGE_LOADING_POLICY,
	PROP_MARK_CITATIONS,
	PROP_ONLY_LOCAL_PHOTOS,
	PROP_SHOW_SENDER_PHOTO,
	PROP_SHOW_REAL_DATE,
	PROP_TEXT_COLOR,
	PROP_WEB_VIEW,
	PROP_HEADERS_STATE,
	PROP_HEADERS_COLLAPSABLE
};

static void efh_url_requested (GtkHTML *html, const gchar *url, GtkHTMLStream *handle, EMFormatHTML *efh);
static gboolean efh_object_requested (GtkHTML *html, GtkHTMLEmbedded *eb, EMFormatHTML *efh);
static void efh_gtkhtml_destroy (GtkHTML *html, EMFormatHTML *efh);

static void	efh_format_message		(EMFormat *emf,
						 CamelStream *stream,
						 CamelMimePart *part,
						 const EMFormatHandler *info,
						 GCancellable *cancellable,
						 gboolean is_fallback);

static void	efh_format_secure		(EMFormat *emf,
						 CamelStream *stream,
						 CamelMimePart *part,
						 CamelCipherValidity *valid,
						 GCancellable *cancellable);

static void	efh_builtin_init		(EMFormatHTMLClass *efhc);

static void	efh_write_image			(EMFormat *emf,
						 CamelStream *stream,
						 EMFormatPURI *puri,
						 GCancellable *cancellable);

static gpointer parent_class;
static CamelDataCache *emfh_http_cache;

#define EMFH_HTTP_CACHE_PATH "http"

/* Sigh, this is so we have a cancellable, async rendering thread */
struct _format_msg {
	MailMsg base;

	EMFormatHTML *format;
	EMFormat *format_source;
	EMHTMLStream *estream;
	CamelFolder *folder;
	gchar *uid;
	CamelMimeMessage *message;
	gboolean cancelled;
};

static gchar *
efh_format_desc (struct _format_msg *m)
{
	return g_strdup(_("Formatting message"));
}

static void
efh_format_exec (struct _format_msg *m,
                 GCancellable *cancellable,
                 GError **error)
{
	EMFormat *format;
	CamelStream *stream;
	struct _EMFormatHTMLJob *job;
	GNode *puri_level;
	CamelURL *base;
	gchar *content;

	if (m->format->priv->web_view == NULL) {
		m->cancelled = TRUE;
		return;
	}

	format = EM_FORMAT (m->format);
	stream = CAMEL_STREAM (m->estream);

	content = g_strdup_printf (
		"<!doctype html public \"-//W3C//DTD HTML 4.0 TRANSITIONAL//EN\">\n<html>\n"
		"<head>\n<meta name=\"generator\" content=\"Evolution Mail Component\">\n</head>\n"
		"<body bgcolor =\"#%06x\" text=\"#%06x\" marginwidth=6 marginheight=6>\n",
		e_color_to_value (
			&m->format->priv->colors[
			EM_FORMAT_HTML_COLOR_BODY]),
		e_color_to_value (
			&m->format->priv->colors[
			EM_FORMAT_HTML_COLOR_HEADER]));
	camel_stream_write_string (stream, content, cancellable, NULL);
	g_free (content);

	/* <insert top-header stuff here> */

	if (format->mode == EM_FORMAT_MODE_SOURCE) {
		em_format_format_source (
			format, stream,
			(CamelMimePart *) m->message, cancellable);
	} else {
		const EMFormatHandler *handle;
		const gchar *mime_type;

		mime_type = "x-evolution/message/prefix";
		handle = em_format_find_handler (format, mime_type);

		if (handle != NULL)
			handle->handler (
				format, stream,
				CAMEL_MIME_PART (m->message), handle,
				cancellable, FALSE);

		mime_type = "x-evolution/message/rfc822";
		handle = em_format_find_handler (format, mime_type);

		if (handle != NULL)
			handle->handler (
				format, stream,
				CAMEL_MIME_PART (m->message), handle,
				cancellable, FALSE);
	}

	camel_stream_flush (stream, cancellable, NULL);

	puri_level = format->pending_uri_level;
	base = format->base;

	do {
		/* now dispatch any added tasks ... */
		g_mutex_lock (m->format->priv->lock);
		while ((job = g_queue_pop_head (&m->format->priv->pending_jobs))) {
			g_mutex_unlock (m->format->priv->lock);

			/* This is an implicit check to see if the gtkhtml has been destroyed */
			if (m->format->priv->web_view == NULL)
				g_cancellable_cancel (cancellable);

			/* call jobs even if cancelled, so they can clean up resources */
			format->pending_uri_level = job->puri_level;
			if (job->base)
				format->base = job->base;
			job->callback (job, cancellable);
			format->base = base;

			/* clean up the job */
			g_object_unref (job->stream);
			if (job->base)
				camel_url_free (job->base);
			g_free (job);

			g_mutex_lock (m->format->priv->lock);
		}
		g_mutex_unlock (m->format->priv->lock);

		if (m->estream) {
			/* Closing this base stream can queue more jobs, so we need
			 * to check the list again after we've finished */
			d(printf("out of jobs, closing root stream\n"));
			camel_stream_write_string (
				(CamelStream *) m->estream,
				"</body>\n</html>\n", cancellable, NULL);
			camel_stream_close ((CamelStream *) m->estream, cancellable, NULL);
			if (g_cancellable_is_cancelled (cancellable)) {
				m->cancelled = TRUE;
				m->estream->sync.cancel = TRUE;
			}
			g_object_unref (m->estream);
			m->estream = NULL;
		}

	} while (!g_queue_is_empty (&m->format->priv->pending_jobs));

	d(printf("out of jobs, done\n"));

	format->pending_uri_level = puri_level;
	m->cancelled = m->cancelled || g_cancellable_is_cancelled (cancellable);
}

static void
efh_format_done (struct _format_msg *m)
{
	d(printf("formatting finished\n"));

	m->format->priv->format_id = -1;
	m->format->priv->load_images_now = FALSE;
	m->format->state = EM_FORMAT_HTML_STATE_NONE;
	g_signal_emit_by_name(m->format, "complete");
}

static void
efh_format_free (struct _format_msg *m)
{
	d(printf("formatter freed\n"));
	g_object_unref (m->format);
	if (m->estream) {
		camel_stream_close ((CamelStream *) m->estream, NULL, NULL);
		if (m->cancelled)
			m->estream->sync.cancel = TRUE;
		g_object_unref (m->estream);
	}
	if (m->folder)
		g_object_unref (m->folder);
	g_free (m->uid);
	if (m->message)
		g_object_unref (m->message);
	if (m->format_source)
		g_object_unref (m->format_source);
}

static MailMsgInfo efh_format_info = {
	sizeof (struct _format_msg),
	(MailMsgDescFunc) efh_format_desc,
	(MailMsgExecFunc) efh_format_exec,
	(MailMsgDoneFunc) efh_format_done,
	(MailMsgFreeFunc) efh_format_free
};

static gboolean
efh_format_helper (struct _format_msg *m,
                   gboolean async)
{
	GtkHTMLStream *hstream;
	EMFormatHTML *efh = m->format;
	struct _EMFormatHTMLPrivate *p = efh->priv;
	EWebView *web_view;

	web_view = em_format_html_get_web_view (m->format);

	if (web_view == NULL) {
		mail_msg_unref (m);
		return FALSE;
	}

	if (async) {
		d(printf("timeout called ...\n"));
		if (p->format_id != -1) {
			d(printf(" still waiting for cancellation to take effect, waiting ...\n"));
			return TRUE;
		}
	}

	g_return_val_if_fail (g_queue_is_empty (&p->pending_jobs), FALSE);

	d(printf(" ready to go, firing off format thread\n"));

	/* call super-class to kick it off */
	/* FIXME Not passing a GCancellable here. */
	EM_FORMAT_CLASS (parent_class)->format_clone (
		EM_FORMAT (efh), m->folder, m->uid,
		m->message, m->format_source, NULL);
	em_format_html_clear_pobject (m->format);

	/* FIXME: method off EMFormat? */
	if (((EMFormat *) efh)->valid) {
		camel_cipher_validity_free (((EMFormat *) efh)->valid);
		((EMFormat *) efh)->valid = NULL;
		((EMFormat *) efh)->valid_parent = NULL;
	}

	if (m->message == NULL) {
		hstream = gtk_html_begin (GTK_HTML (web_view));
		gtk_html_stream_close (hstream, GTK_HTML_STREAM_OK);
		mail_msg_unref (m);
		p->last_part = NULL;
	} else {
		efh->state = EM_FORMAT_HTML_STATE_RENDERING;
#if HAVE_CLUTTER
		if (p->last_part != m->message && !e_shell_get_express_mode (e_shell_get_default ())) {
#else
		if (p->last_part != m->message) {
#endif
			hstream = gtk_html_begin (GTK_HTML (web_view));
			gtk_html_stream_printf (hstream, "<h5>%s</h5>", _("Formatting Message..."));
			gtk_html_stream_close (hstream, GTK_HTML_STREAM_OK);
		}

		hstream = NULL;
		m->estream = (EMHTMLStream *) em_html_stream_new (
			GTK_HTML (web_view), hstream);

		if (p->last_part == m->message) {
			em_html_stream_set_flags (m->estream,
						  GTK_HTML_BEGIN_KEEP_SCROLL | GTK_HTML_BEGIN_KEEP_IMAGES
						  | GTK_HTML_BEGIN_BLOCK_UPDATES | GTK_HTML_BEGIN_BLOCK_IMAGES);
		} else {
			/* clear cache of inline-scanned text parts */
			g_hash_table_remove_all (p->text_inline_parts);

			p->last_part = m->message;
		}

		efh->priv->format_id = m->base.seq;

		if (async) {
			mail_msg_unordered_push (m);
		} else {
			efh_format_exec (m, NULL, NULL);
		}
	}

	efh->priv->format_timeout_id = 0;
	efh->priv->format_timeout_msg = NULL;

	return FALSE;
}

static void
efh_free_cache (struct _EMFormatHTMLCache *efhc)
{
	if (efhc->textmp)
		g_object_unref (efhc->textmp);
	g_free (efhc);
}

static void
efh_gtkhtml_destroy (GtkHTML *html,
                     EMFormatHTML *efh)
{
	if (efh->priv->format_timeout_id != 0) {
		g_source_remove (efh->priv->format_timeout_id);
		efh->priv->format_timeout_id = 0;
		mail_msg_unref (efh->priv->format_timeout_msg);
		efh->priv->format_timeout_msg = NULL;
	}

	/* This probably works ... */
	if (efh->priv->format_id != -1)
		mail_msg_cancel (efh->priv->format_id);

	if (efh->priv->web_view != NULL) {
		g_object_unref (efh->priv->web_view);
		efh->priv->web_view = NULL;
	}
}

static struct _EMFormatHTMLCache *
efh_insert_cache (EMFormatHTML *efh,
                  const gchar *partid)
{
	struct _EMFormatHTMLCache *efhc;

	efhc = g_malloc0 (sizeof (*efh) + strlen (partid));
	strcpy (efhc->partid, partid);
	g_hash_table_insert (efh->priv->text_inline_parts, efhc->partid, efhc);

	return efhc;
}

static void
efh_set_property (GObject *object,
                  guint property_id,
                  const GValue *value,
                  GParamSpec *pspec)
{
	switch (property_id) {
		case PROP_BODY_COLOR:
			em_format_html_set_color (
				EM_FORMAT_HTML (object),
				EM_FORMAT_HTML_COLOR_BODY,
				g_value_get_boxed (value));
			return;

		case PROP_CITATION_COLOR:
			em_format_html_set_color (
				EM_FORMAT_HTML (object),
				EM_FORMAT_HTML_COLOR_CITATION,
				g_value_get_boxed (value));
			return;

		case PROP_CONTENT_COLOR:
			em_format_html_set_color (
				EM_FORMAT_HTML (object),
				EM_FORMAT_HTML_COLOR_CONTENT,
				g_value_get_boxed (value));
			return;

		case PROP_FRAME_COLOR:
			em_format_html_set_color (
				EM_FORMAT_HTML (object),
				EM_FORMAT_HTML_COLOR_FRAME,
				g_value_get_boxed (value));
			return;

		case PROP_HEADER_COLOR:
			em_format_html_set_color (
				EM_FORMAT_HTML (object),
				EM_FORMAT_HTML_COLOR_HEADER,
				g_value_get_boxed (value));
			return;

		case PROP_IMAGE_LOADING_POLICY:
			em_format_html_set_image_loading_policy (
				EM_FORMAT_HTML (object),
				g_value_get_enum (value));
			return;

		case PROP_MARK_CITATIONS:
			em_format_html_set_mark_citations (
				EM_FORMAT_HTML (object),
				g_value_get_boolean (value));
			return;

		case PROP_ONLY_LOCAL_PHOTOS:
			em_format_html_set_only_local_photos (
				EM_FORMAT_HTML (object),
				g_value_get_boolean (value));
			return;

		case PROP_SHOW_SENDER_PHOTO:
			em_format_html_set_show_sender_photo (
				EM_FORMAT_HTML (object),
				g_value_get_boolean (value));
			return;

		case PROP_SHOW_REAL_DATE:
			em_format_html_set_show_real_date (
				EM_FORMAT_HTML (object),
				g_value_get_boolean (value));
			return;

		case PROP_TEXT_COLOR:
			em_format_html_set_color (
				EM_FORMAT_HTML (object),
				EM_FORMAT_HTML_COLOR_TEXT,
				g_value_get_boxed (value));
			return;
		case PROP_HEADERS_STATE:
			em_format_html_set_headers_state (
				EM_FORMAT_HTML (object),
				g_value_get_int (value));
			return;
		case PROP_HEADERS_COLLAPSABLE:
			em_format_html_set_headers_collapsable (
				EM_FORMAT_HTML (object),
				g_value_get_boolean (value));
	}

	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
efh_get_property (GObject *object,
                  guint property_id,
                  GValue *value,
                  GParamSpec *pspec)
{
	GdkColor color;

	switch (property_id) {
		case PROP_BODY_COLOR:
			em_format_html_get_color (
				EM_FORMAT_HTML (object),
				EM_FORMAT_HTML_COLOR_BODY,
				&color);
			g_value_set_boxed (value, &color);
			return;

		case PROP_CITATION_COLOR:
			em_format_html_get_color (
				EM_FORMAT_HTML (object),
				EM_FORMAT_HTML_COLOR_CITATION,
				&color);
			g_value_set_boxed (value, &color);
			return;

		case PROP_CONTENT_COLOR:
			em_format_html_get_color (
				EM_FORMAT_HTML (object),
				EM_FORMAT_HTML_COLOR_CONTENT,
				&color);
			g_value_set_boxed (value, &color);
			return;

		case PROP_FRAME_COLOR:
			em_format_html_get_color (
				EM_FORMAT_HTML (object),
				EM_FORMAT_HTML_COLOR_FRAME,
				&color);
			g_value_set_boxed (value, &color);
			return;

		case PROP_HEADER_COLOR:
			em_format_html_get_color (
				EM_FORMAT_HTML (object),
				EM_FORMAT_HTML_COLOR_HEADER,
				&color);
			g_value_set_boxed (value, &color);
			return;

		case PROP_IMAGE_LOADING_POLICY:
			g_value_set_enum (
				value,
				em_format_html_get_image_loading_policy (
				EM_FORMAT_HTML (object)));
			return;

		case PROP_MARK_CITATIONS:
			g_value_set_boolean (
				value, em_format_html_get_mark_citations (
				EM_FORMAT_HTML (object)));
			return;

		case PROP_ONLY_LOCAL_PHOTOS:
			g_value_set_boolean (
				value, em_format_html_get_only_local_photos (
				EM_FORMAT_HTML (object)));
			return;

		case PROP_SHOW_SENDER_PHOTO:
			g_value_set_boolean (
				value, em_format_html_get_show_sender_photo (
				EM_FORMAT_HTML (object)));
			return;

		case PROP_SHOW_REAL_DATE:
			g_value_set_boolean (
				value, em_format_html_get_show_real_date (
				EM_FORMAT_HTML (object)));
			return;

		case PROP_TEXT_COLOR:
			em_format_html_get_color (
				EM_FORMAT_HTML (object),
				EM_FORMAT_HTML_COLOR_TEXT,
				&color);
			g_value_set_boxed (value, &color);
			return;

		case PROP_WEB_VIEW:
			g_value_set_object (
				value, em_format_html_get_web_view (
				EM_FORMAT_HTML (object)));
			return;
		case PROP_HEADERS_STATE:
			g_value_set_int (
				value, em_format_html_get_headers_state (
				EM_FORMAT_HTML (object)));
			return;
		case PROP_HEADERS_COLLAPSABLE:
			g_value_set_boolean (
				value, em_format_html_get_headers_collapsable (
				EM_FORMAT_HTML (object)));
	}

	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
efh_finalize (GObject *object)
{
	EMFormatHTML *efh = EM_FORMAT_HTML (object);

	em_format_html_clear_pobject (efh);
	efh_gtkhtml_destroy (GTK_HTML (efh->priv->web_view), efh);

	g_hash_table_destroy (efh->priv->text_inline_parts);

	g_mutex_free (efh->priv->lock);

	/* Chain up to parent's finalize() method. */
	G_OBJECT_CLASS (parent_class)->finalize (object);
}

static gboolean
efh_format_timeout (struct _format_msg *m)
{
	return efh_format_helper (m, TRUE);
}

void
em_format_html_clone_sync (CamelFolder *folder,
                           const gchar *uid,
                           CamelMimeMessage *msg,
                           EMFormatHTML *efh,
                           EMFormat *source)
{
	struct _format_msg *m;

	m = mail_msg_new (&efh_format_info);
	m->format = g_object_ref (efh);
	if (source)
		m->format_source = g_object_ref (source);
	m->folder = g_object_ref (folder);
	m->uid = g_strdup (uid);
	m->message = g_object_ref (msg);

	efh_format_helper (m, FALSE);
	efh_format_free (m);
}

static void
efh_format_clone (EMFormat *emf,
                  CamelFolder *folder,
                  const gchar *uid,
                  CamelMimeMessage *msg,
                  EMFormat *emfsource,
                  GCancellable *cancellable)
{
	EMFormatHTML *efh = EM_FORMAT_HTML (emf);
	struct _format_msg *m;

	/* How to sub-class ?  Might need to adjust api ... */

	if (efh->priv->web_view == NULL)
		return;

	d(printf("efh_format called\n"));
	if (efh->priv->format_timeout_id != 0) {
		d(printf(" timeout for last still active, removing ...\n"));
		g_source_remove (efh->priv->format_timeout_id);
		efh->priv->format_timeout_id = 0;
		mail_msg_unref (efh->priv->format_timeout_msg);
		efh->priv->format_timeout_msg = NULL;
	}

	if (emfsource != NULL)
		g_object_ref (emfsource);

	if (folder != NULL)
		g_object_ref (folder);

	if (msg != NULL)
		g_object_ref (msg);

	m = mail_msg_new (&efh_format_info);
	m->format = g_object_ref (emf);
	m->format_source = emfsource;
	m->folder = folder;
	m->uid = g_strdup (uid);
	m->message = msg;

	if (efh->priv->format_id == -1) {
		d(printf(" idle, forcing format\n"));
		efh_format_timeout (m);
	} else {
		d(printf(" still busy, cancelling and queuing wait\n"));
		/* cancel and poll for completion */
		mail_msg_cancel (efh->priv->format_id);
		efh->priv->format_timeout_msg = m;
		efh->priv->format_timeout_id = g_timeout_add (
			100, (GSourceFunc) efh_format_timeout, m);
	}
}

static void
efh_format_error (EMFormat *emf,
                  CamelStream *stream,
                  const gchar *txt)
{
	GString *buffer;
	gchar *html;

	buffer = g_string_new ("<em><font color=\"red\">");

	html = camel_text_to_html (
		txt, CAMEL_MIME_FILTER_TOHTML_CONVERT_NL |
		CAMEL_MIME_FILTER_TOHTML_CONVERT_URLS, 0);
	g_string_append (buffer, html);
	g_free (html);

	g_string_append (buffer, "</font></em><br>");

	camel_stream_write (stream, buffer->str, buffer->len, NULL, NULL);

	g_string_free (buffer, TRUE);
}

static void
efh_format_source (EMFormat *emf,
                   CamelStream *stream,
                   CamelMimePart *part,
                   GCancellable *cancellable)
{
	CamelStream *filtered_stream;
	CamelMimeFilter *filter;
	CamelDataWrapper *dw = (CamelDataWrapper *) part;

	filtered_stream = camel_stream_filter_new (stream);

	filter = camel_mime_filter_tohtml_new (
		CAMEL_MIME_FILTER_TOHTML_CONVERT_NL |
		CAMEL_MIME_FILTER_TOHTML_CONVERT_SPACES |
		CAMEL_MIME_FILTER_TOHTML_PRESERVE_8BIT, 0);
	camel_stream_filter_add (
		CAMEL_STREAM_FILTER (filtered_stream), filter);
	g_object_unref (filter);

	camel_stream_write_string (
		stream, "<table><tr><td><tt>", cancellable, NULL);
	em_format_format_text (emf, filtered_stream, dw, cancellable);
	camel_stream_write_string (
		stream, "</tt></td></tr></table>", cancellable, NULL);

	g_object_unref (filtered_stream);
}

static void
efh_format_attachment (EMFormat *emf,
                       CamelStream *stream,
                       CamelMimePart *part,
                       const gchar *mime_type,
                       const EMFormatHandler *handle,
                       GCancellable *cancellable)
{
	gchar *text, *html;

	/* we display all inlined attachments only */

	/* this could probably be cleaned up ... */
	camel_stream_write_string (
		stream,
		"<table border=1 cellspacing=0 cellpadding=0><tr><td>"
		"<table width=10 cellspacing=0 cellpadding=0>"
		"<tr><td></td></tr></table></td>"
		"<td><table width=3 cellspacing=0 cellpadding=0>"
		"<tr><td></td></tr></table></td><td><font size=-1>\n",
		cancellable, NULL);

	/* output some info about it */
	text = em_format_describe_part (part, mime_type);
	html = camel_text_to_html (
		text, ((EMFormatHTML *) emf)->text_html_flags &
		CAMEL_MIME_FILTER_TOHTML_CONVERT_URLS, 0);
	camel_stream_write_string (stream, html, cancellable, NULL);
	g_free (html);
	g_free (text);

	camel_stream_write_string (
		stream, "</font></td></tr><tr></table>", cancellable, NULL);

	if (handle && em_format_is_inline (emf, emf->part_id->str, part, handle))
		handle->handler (emf, stream, part, handle, cancellable, FALSE);
}

static gboolean
efh_busy (EMFormat *emf)
{
	EMFormatHTMLPrivate *priv;

	priv = EM_FORMAT_HTML_GET_PRIVATE (emf);

	return (priv->format_id != -1);
}
static void
efh_base_init (EMFormatHTMLClass *class)
{
	efh_builtin_init (class);
}

static void
efh_class_init (EMFormatHTMLClass *class)
{
	GObjectClass *object_class;
	EMFormatClass *format_class;
	const gchar *user_cache_dir;

	parent_class = g_type_class_peek_parent (class);
	g_type_class_add_private (class, sizeof (EMFormatHTMLPrivate));

	object_class = G_OBJECT_CLASS (class);
	object_class->set_property = efh_set_property;
	object_class->get_property = efh_get_property;
	object_class->finalize = efh_finalize;

	format_class = EM_FORMAT_CLASS (class);
	format_class->format_clone = efh_format_clone;
	format_class->format_error = efh_format_error;
	format_class->format_source = efh_format_source;
	format_class->format_attachment = efh_format_attachment;
	format_class->format_secure = efh_format_secure;
	format_class->busy = efh_busy;

	class->html_widget_type = E_TYPE_WEB_VIEW;

	g_object_class_install_property (
		object_class,
		PROP_BODY_COLOR,
		g_param_spec_boxed (
			"body-color",
			"Body Color",
			NULL,
			GDK_TYPE_COLOR,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		object_class,
		PROP_CITATION_COLOR,
		g_param_spec_boxed (
			"citation-color",
			"Citation Color",
			NULL,
			GDK_TYPE_COLOR,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		object_class,
		PROP_CONTENT_COLOR,
		g_param_spec_boxed (
			"content-color",
			"Content Color",
			NULL,
			GDK_TYPE_COLOR,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		object_class,
		PROP_FRAME_COLOR,
		g_param_spec_boxed (
			"frame-color",
			"Frame Color",
			NULL,
			GDK_TYPE_COLOR,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		object_class,
		PROP_HEADER_COLOR,
		g_param_spec_boxed (
			"header-color",
			"Header Color",
			NULL,
			GDK_TYPE_COLOR,
			G_PARAM_READWRITE));

	/* FIXME Make this a proper enum property. */
	g_object_class_install_property (
		object_class,
		PROP_IMAGE_LOADING_POLICY,
		g_param_spec_enum (
			"image-loading-policy",
			"Image Loading Policy",
			NULL,
			E_TYPE_MAIL_IMAGE_LOADING_POLICY,
			E_MAIL_IMAGE_LOADING_POLICY_ALWAYS,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		object_class,
		PROP_MARK_CITATIONS,
		g_param_spec_boolean (
			"mark-citations",
			"Mark Citations",
			NULL,
			TRUE,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		object_class,
		PROP_ONLY_LOCAL_PHOTOS,
		g_param_spec_boolean (
			"only-local-photos",
			"Only Local Photos",
			NULL,
			TRUE,
			G_PARAM_READWRITE |
			G_PARAM_CONSTRUCT));

	g_object_class_install_property (
		object_class,
		PROP_SHOW_SENDER_PHOTO,
		g_param_spec_boolean (
			"show-sender-photo",
			"Show Sender Photo",
			NULL,
			TRUE,
			G_PARAM_READWRITE |
			G_PARAM_CONSTRUCT));

	g_object_class_install_property (
		object_class,
		PROP_SHOW_REAL_DATE,
		g_param_spec_boolean (
			"show-real-date",
			"Show real Date header value",
			NULL,
			TRUE,
			G_PARAM_READWRITE |
			G_PARAM_CONSTRUCT));

	g_object_class_install_property (
		object_class,
		PROP_TEXT_COLOR,
		g_param_spec_boxed (
			"text-color",
			"Text Color",
			NULL,
			GDK_TYPE_COLOR,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		object_class,
		PROP_WEB_VIEW,
		g_param_spec_object (
			"web-view",
			"Web View",
			NULL,
			E_TYPE_WEB_VIEW,
			G_PARAM_READABLE));

	g_object_class_install_property (
		object_class,
		PROP_HEADERS_STATE,
		g_param_spec_int (
			"headers-state",
			"Headers state",
			NULL,
			EM_FORMAT_HTML_HEADERS_STATE_EXPANDED,
			EM_FORMAT_HTML_HEADERS_STATE_COLLAPSED,
			EM_FORMAT_HTML_HEADERS_STATE_EXPANDED,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		object_class,
		PROP_HEADERS_STATE,
		g_param_spec_boolean (
			"headers-collapsable",
			NULL,
			NULL,
			FALSE,
			G_PARAM_READWRITE));

	/* cache expiry - 2 hour access, 1 day max */
	user_cache_dir = e_get_user_cache_dir ();
	emfh_http_cache = camel_data_cache_new (user_cache_dir, NULL);
	if (emfh_http_cache) {
		camel_data_cache_set_expire_age (emfh_http_cache, 24 *60 *60);
		camel_data_cache_set_expire_access (emfh_http_cache, 2 *60 *60);
	}
}

static void
efh_init (EMFormatHTML *efh,
          EMFormatHTMLClass *class)
{
	EWebView *web_view;
	GdkColor *color;

	efh->priv = EM_FORMAT_HTML_GET_PRIVATE (efh);

	g_queue_init (&efh->pending_object_list);
	g_queue_init (&efh->priv->pending_jobs);
	efh->priv->lock = g_mutex_new ();
	efh->priv->format_id = -1;
	efh->priv->text_inline_parts = g_hash_table_new_full (
		g_str_hash, g_str_equal,
		(GDestroyNotify) NULL,
		(GDestroyNotify) efh_free_cache);

	web_view = g_object_new (class->html_widget_type, NULL);
	efh->priv->web_view = g_object_ref_sink (web_view);

	gtk_html_set_blocking (GTK_HTML (web_view), FALSE);
	gtk_html_set_caret_first_focus_anchor (
		GTK_HTML (web_view), EFM_MESSAGE_START_ANAME);
	gtk_html_set_default_content_type (
		GTK_HTML (web_view), "text/html; charset=utf-8");
	e_web_view_set_editable (web_view, FALSE);

	g_signal_connect (
		web_view, "url-requested",
		G_CALLBACK (efh_url_requested), efh);
	g_signal_connect (
		web_view, "object-requested",
		G_CALLBACK (efh_object_requested), efh);

	color = &efh->priv->colors[EM_FORMAT_HTML_COLOR_BODY];
	gdk_color_parse ("#eeeeee", color);

	color = &efh->priv->colors[EM_FORMAT_HTML_COLOR_CONTENT];
	gdk_color_parse ("#ffffff", color);

	color = &efh->priv->colors[EM_FORMAT_HTML_COLOR_FRAME];
	gdk_color_parse ("#3f3f3f", color);

	color = &efh->priv->colors[EM_FORMAT_HTML_COLOR_HEADER];
	gdk_color_parse ("#eeeeee", color);

	color = &efh->priv->colors[EM_FORMAT_HTML_COLOR_TEXT];
	gdk_color_parse ("#000000", color);

	efh->text_html_flags =
		CAMEL_MIME_FILTER_TOHTML_CONVERT_NL |
		CAMEL_MIME_FILTER_TOHTML_CONVERT_SPACES |
		CAMEL_MIME_FILTER_TOHTML_MARK_CITATION;
	efh->show_icon = TRUE;
	efh->state = EM_FORMAT_HTML_STATE_NONE;

	e_extensible_load_extensions (E_EXTENSIBLE (efh));
}

GType
em_format_html_get_type (void)
{
	static GType type = 0;

	if (G_UNLIKELY (type == 0)) {
		static const GTypeInfo type_info = {
			sizeof (EMFormatHTMLClass),
			(GBaseInitFunc) efh_base_init,
			(GBaseFinalizeFunc) NULL,
			(GClassInitFunc) efh_class_init,
			(GClassFinalizeFunc) NULL,
			NULL,  /* class_data */
			sizeof (EMFormatHTML),
			0,     /* n_preallocs */
			(GInstanceInitFunc) efh_init,
			NULL   /* value_table */
		};

		static const GInterfaceInfo extensible_info = {
			(GInterfaceInitFunc) NULL,
			(GInterfaceFinalizeFunc) NULL,
			NULL   /* interface_data */
		};

		type = g_type_register_static (
			em_format_get_type(), "EMFormatHTML",
			&type_info, G_TYPE_FLAG_ABSTRACT);

		g_type_add_interface_static (
			type, E_TYPE_EXTENSIBLE, &extensible_info);
	}

	return type;
}

EWebView *
em_format_html_get_web_view (EMFormatHTML *efh)
{
	g_return_val_if_fail (EM_IS_FORMAT_HTML (efh), NULL);

	return efh->priv->web_view;
}

void
em_format_html_load_images (EMFormatHTML *efh)
{
	g_return_if_fail (EM_IS_FORMAT_HTML (efh));

	if (efh->priv->image_loading_policy == E_MAIL_IMAGE_LOADING_POLICY_ALWAYS)
		return;

	/* This will remain set while we're still
	 * rendering the same message, then it wont be. */
	efh->priv->load_images_now = TRUE;
	em_format_queue_redraw (EM_FORMAT (efh));
}

void
em_format_html_get_color (EMFormatHTML *efh,
                          EMFormatHTMLColorType type,
                          GdkColor *color)
{
	GdkColor *format_color;

	g_return_if_fail (EM_IS_FORMAT_HTML (efh));
	g_return_if_fail (type < EM_FORMAT_HTML_NUM_COLOR_TYPES);
	g_return_if_fail (color != NULL);

	format_color = &efh->priv->colors[type];

	color->red   = format_color->red;
	color->green = format_color->green;
	color->blue  = format_color->blue;
}

void
em_format_html_set_color (EMFormatHTML *efh,
                          EMFormatHTMLColorType type,
                          const GdkColor *color)
{
	GdkColor *format_color;
	const gchar *property_name;

	g_return_if_fail (EM_IS_FORMAT_HTML (efh));
	g_return_if_fail (type < EM_FORMAT_HTML_NUM_COLOR_TYPES);
	g_return_if_fail (color != NULL);

	format_color = &efh->priv->colors[type];

	if (gdk_color_equal (color, format_color))
		return;

	format_color->red   = color->red;
	format_color->green = color->green;
	format_color->blue  = color->blue;

	switch (type) {
		case EM_FORMAT_HTML_COLOR_BODY:
			property_name = "body-color";
			break;
		case EM_FORMAT_HTML_COLOR_CITATION:
			property_name = "citation-color";
			break;
		case EM_FORMAT_HTML_COLOR_CONTENT:
			property_name = "content-color";
			break;
		case EM_FORMAT_HTML_COLOR_FRAME:
			property_name = "frame-color";
			break;
		case EM_FORMAT_HTML_COLOR_HEADER:
			property_name = "header-color";
			break;
		case EM_FORMAT_HTML_COLOR_TEXT:
			property_name = "text-color";
			break;
		default:
			g_return_if_reached ();
	}

	g_object_notify (G_OBJECT (efh), property_name);
}

EMailImageLoadingPolicy
em_format_html_get_image_loading_policy (EMFormatHTML *efh)
{
	g_return_val_if_fail (EM_IS_FORMAT_HTML (efh), 0);

	return efh->priv->image_loading_policy;
}

void
em_format_html_set_image_loading_policy (EMFormatHTML *efh,
                                         EMailImageLoadingPolicy policy)
{
	g_return_if_fail (EM_IS_FORMAT_HTML (efh));

	if (policy == efh->priv->image_loading_policy)
		return;

	efh->priv->image_loading_policy = policy;

	g_object_notify (G_OBJECT (efh), "image-loading-policy");
}

gboolean
em_format_html_get_mark_citations (EMFormatHTML *efh)
{
	guint32 flags;

	g_return_val_if_fail (EM_IS_FORMAT_HTML (efh), FALSE);

	flags = efh->text_html_flags;

	return ((flags & CAMEL_MIME_FILTER_TOHTML_MARK_CITATION) != 0);
}

void
em_format_html_set_mark_citations (EMFormatHTML *efh,
                                   gboolean mark_citations)
{
	g_return_if_fail (EM_IS_FORMAT_HTML (efh));

	if (mark_citations)
		efh->text_html_flags |=
			CAMEL_MIME_FILTER_TOHTML_MARK_CITATION;
	else
		efh->text_html_flags &=
			~CAMEL_MIME_FILTER_TOHTML_MARK_CITATION;

	g_object_notify (G_OBJECT (efh), "mark-citations");
}

gboolean
em_format_html_get_only_local_photos (EMFormatHTML *efh)
{
	g_return_val_if_fail (EM_IS_FORMAT_HTML (efh), FALSE);

	return efh->priv->only_local_photos;
}

void
em_format_html_set_only_local_photos (EMFormatHTML *efh,
                                      gboolean only_local_photos)
{
	g_return_if_fail (EM_IS_FORMAT_HTML (efh));

	efh->priv->only_local_photos = only_local_photos;

	g_object_notify (G_OBJECT (efh), "only-local-photos");
}

gboolean
em_format_html_get_show_sender_photo (EMFormatHTML *efh)
{
	g_return_val_if_fail (EM_IS_FORMAT_HTML (efh), FALSE);

	return efh->priv->show_sender_photo;
}

void
em_format_html_set_show_sender_photo (EMFormatHTML *efh,
                                      gboolean show_sender_photo)
{
	g_return_if_fail (EM_IS_FORMAT_HTML (efh));

	efh->priv->show_sender_photo = show_sender_photo;

	g_object_notify (G_OBJECT (efh), "show-sender-photo");
}

gboolean
em_format_html_get_show_real_date (EMFormatHTML *efh)
{
	g_return_val_if_fail (EM_IS_FORMAT_HTML (efh), FALSE);

	return efh->priv->show_real_date;
}

void
em_format_html_set_show_real_date (EMFormatHTML *efh,
                                   gboolean show_real_date)
{
	g_return_if_fail (EM_IS_FORMAT_HTML (efh));

	efh->priv->show_real_date = show_real_date;

	g_object_notify (G_OBJECT (efh), "show-real-date");
}

EMFormatHTMLHeadersState
em_format_html_get_headers_state (EMFormatHTML *efh)
{
	g_return_val_if_fail (EM_IS_FORMAT_HTML (efh), EM_FORMAT_HTML_HEADERS_STATE_EXPANDED);

	return efh->priv->headers_state;
}

void
em_format_html_set_headers_state (EMFormatHTML *efh,
                                  EMFormatHTMLHeadersState state)
{
	g_return_if_fail (EM_IS_FORMAT_HTML (efh));

	efh->priv->headers_state = state;

	g_object_notify (G_OBJECT (efh), "headers-state");
}

gboolean
em_format_html_get_headers_collapsable (EMFormatHTML *efh)
{
	g_return_val_if_fail (EM_IS_FORMAT_HTML (efh), FALSE);

	return efh->priv->headers_collapsable;
}

void
em_format_html_set_headers_collapsable (EMFormatHTML *efh,
                                        gboolean collapsable)
{
	g_return_if_fail (EM_IS_FORMAT_HTML (efh));

	efh->priv->headers_collapsable = collapsable;

	g_object_notify (G_OBJECT (efh), "headers-collapsable");
}

CamelMimePart *
em_format_html_file_part (EMFormatHTML *efh,
                          const gchar *mime_type,
                          const gchar *filename,
                          GCancellable *cancellable)
{
	CamelMimePart *part;
	CamelStream *stream;
	CamelDataWrapper *dw;
	gchar *basename;

	stream = camel_stream_fs_new_with_name (filename, O_RDONLY, 0, NULL);
	if (stream == NULL)
		return NULL;

	dw = camel_data_wrapper_new ();
	camel_data_wrapper_construct_from_stream_sync (
		dw, stream, cancellable, NULL);
	g_object_unref (stream);
	if (mime_type)
		camel_data_wrapper_set_mime_type (dw, mime_type);
	part = camel_mime_part_new ();
	camel_medium_set_content ((CamelMedium *) part, dw);
	g_object_unref (dw);
	basename = g_path_get_basename (filename);
	camel_mime_part_set_filename (part, basename);
	g_free (basename);

	return part;
}

/* all this api is a pain in the bum ... */

EMFormatHTMLPObject *
em_format_html_add_pobject (EMFormatHTML *efh,
                            gsize size,
                            const gchar *classid,
                            CamelMimePart *part,
                            EMFormatHTMLPObjectFunc func)
{
	EMFormatHTMLPObject *pobj;

	if (size < sizeof (EMFormatHTMLPObject)) {
		g_warning ("size is less than the size of EMFormatHTMLPObject\n");
		size = sizeof (EMFormatHTMLPObject);
	}

	pobj = g_malloc0 (size);
	if (classid)
		pobj->classid = g_strdup (classid);
	else
		pobj->classid = g_strdup_printf("e-object:///%s", ((EMFormat *)efh)->part_id->str);

	pobj->format = efh;
	pobj->func = func;
	pobj->part = part;

	g_queue_push_tail (&efh->pending_object_list, pobj);

	return pobj;
}

EMFormatHTMLPObject *
em_format_html_find_pobject (EMFormatHTML *emf,
                             const gchar *classid)
{
	GList *link;

	g_return_val_if_fail (EM_IS_FORMAT_HTML (emf), NULL);
	g_return_val_if_fail (classid != NULL, NULL);

	link = g_queue_peek_head_link (&emf->pending_object_list);

	while (link != NULL) {
		EMFormatHTMLPObject *pw = link->data;

		if (!strcmp (pw->classid, classid))
			return pw;

		link = g_list_next (link);
	}

	return NULL;
}

EMFormatHTMLPObject *
em_format_html_find_pobject_func (EMFormatHTML *emf,
                                  CamelMimePart *part,
                                  EMFormatHTMLPObjectFunc func)
{
	GList *link;

	g_return_val_if_fail (EM_IS_FORMAT_HTML (emf), NULL);

	link = g_queue_peek_head_link (&emf->pending_object_list);

	while (link != NULL) {
		EMFormatHTMLPObject *pw = link->data;

		if (pw->func == func && pw->part == part)
			return pw;

		link = g_list_next (link);
	}

	return NULL;
}

void
em_format_html_remove_pobject (EMFormatHTML *emf,
                               EMFormatHTMLPObject *pobject)
{
	g_return_if_fail (EM_IS_FORMAT_HTML (emf));
	g_return_if_fail (pobject != NULL);

	g_queue_remove (&emf->pending_object_list, pobject);

	if (pobject->free != NULL)
		pobject->free (pobject);

	g_free (pobject->classid);
	g_free (pobject);
}

void
em_format_html_clear_pobject (EMFormatHTML *emf)
{
	g_return_if_fail (EM_IS_FORMAT_HTML (emf));

	while (!g_queue_is_empty (&emf->pending_object_list)) {
		EMFormatHTMLPObject *pobj;

		pobj = g_queue_pop_head (&emf->pending_object_list);
		em_format_html_remove_pobject (emf, pobj);
	}
}

struct _EMFormatHTMLJob *
em_format_html_job_new (EMFormatHTML *emfh,
                        void (*callback) (struct _EMFormatHTMLJob *job,
                                          GCancellable *cancellable),
                        gpointer data)
{
	struct _EMFormatHTMLJob *job = g_malloc0 (sizeof (*job));

	job->format = emfh;
	job->puri_level = ((EMFormat *) emfh)->pending_uri_level;
	job->callback = callback;
	job->u.data = data;
	if (((EMFormat *) emfh)->base)
		job->base = camel_url_copy (((EMFormat *) emfh)->base);

	return job;
}

void
em_format_html_job_queue (EMFormatHTML *emfh,
                          struct _EMFormatHTMLJob *job)
{
	g_mutex_lock (emfh->priv->lock);
	g_queue_push_tail (&emfh->priv->pending_jobs, job);
	g_mutex_unlock (emfh->priv->lock);
}

/* ********************************************************************** */

static void
emfh_getpuri (struct _EMFormatHTMLJob *job,
              GCancellable *cancellable)
{
	d(printf(" running getpuri task\n"));
	if (!g_cancellable_is_cancelled (cancellable))
		job->u.puri->func (
			EM_FORMAT (job->format), job->stream,
			job->u.puri, cancellable);
}

static void
emfh_configure_stream_for_proxy (CamelHttpStream *stream,
                                 const gchar *uri)
{
	EProxy *proxy;
	SoupURI *proxy_uri;
	gchar *basic;
	gchar *basic64;
	const gchar *user = "";
	const gchar *password = "";

	proxy = em_utils_get_proxy ();

	if (!e_proxy_require_proxy_for_uri (proxy, uri))
		return;

	proxy_uri = e_proxy_peek_uri_for (proxy, uri);

	if (proxy_uri == NULL)
		return;

	if (proxy_uri->user != NULL)
		user = proxy_uri->user;

	if (proxy_uri->password != NULL)
		password = proxy_uri->password;

	if (*user == '\0' && *password == '\0')
		return;

	basic = g_strdup_printf ("%s:%s", user, password);
	basic64 = g_base64_encode ((guchar *) basic, strlen (basic));
	camel_http_stream_set_proxy_authpass (stream, basic64);
	g_free (basic64);
	g_free (basic);
}

static void
emfh_gethttp (struct _EMFormatHTMLJob *job,
              GCancellable *cancellable)
{
	CamelStream *cistream = NULL, *costream = NULL, *instream = NULL;
	CamelURL *url;
	CamelHttpStream *tmp_stream;
	gssize n, total = 0, pc_complete = 0, nread = 0;
	gchar buffer[1500];
	const gchar *length;

	if (g_cancellable_is_cancelled (cancellable)
	    || (url = camel_url_new (job->u.uri, NULL)) == NULL)
		goto badurl;

	d(printf(" running load uri task: %s\n", job->u.uri));

	if (emfh_http_cache)
		instream = cistream = camel_data_cache_get (emfh_http_cache, EMFH_HTTP_CACHE_PATH, job->u.uri, NULL);

	if (instream == NULL) {
		EMailImageLoadingPolicy policy;

		policy = em_format_html_get_image_loading_policy (job->format);

		if (!(job->format->priv->load_images_now
		      || policy == E_MAIL_IMAGE_LOADING_POLICY_ALWAYS
		      || (policy == E_MAIL_IMAGE_LOADING_POLICY_SOMETIMES
			  && em_utils_in_addressbook ((CamelInternetAddress *) camel_mime_message_get_from (job->format->parent.message), FALSE)))) {
			/* TODO: Ideally we would put the http requests into
			 * another queue and only send them out if the user
			 * selects 'load images', when they do.  The problem
			 * is how to maintain this state with multiple
			 * renderings, and how to adjust the thread
			 * dispatch/setup routine to handle it */
			camel_url_free (url);
			goto done;
		}

		instream = camel_http_stream_new (CAMEL_HTTP_METHOD_GET, ((EMFormat *) job->format)->session, url);
		camel_http_stream_set_user_agent((CamelHttpStream *) instream, "CamelHttpStream/1.0 Evolution/" VERSION);
		emfh_configure_stream_for_proxy ((CamelHttpStream *) instream, job->u.uri);

		camel_operation_push_message (
			cancellable, _("Retrieving '%s'"), job->u.uri);
		tmp_stream = (CamelHttpStream *) instream;
		if (camel_stream_read (CAMEL_STREAM (instream), NULL, 0, cancellable, NULL) == 0) {
			CamelContentType *content_type;

			content_type = camel_http_stream_get_content_type (tmp_stream);
			length = camel_header_raw_find(&tmp_stream->headers, "Content-Length", NULL);
			d(printf("  Content-Length: %s\n", length));
			if (length != NULL)
				total = atoi (length);
			camel_content_type_unref (content_type);
		}
	} else
		camel_operation_push_message (
			cancellable, _("Retrieving '%s'"), job->u.uri);

	camel_url_free (url);

	if (instream == NULL)
		goto done;

	if (emfh_http_cache != NULL && cistream == NULL)
		costream = camel_data_cache_add (emfh_http_cache, EMFH_HTTP_CACHE_PATH, job->u.uri, NULL);

	do {
		if (g_cancellable_is_cancelled (cancellable)) {
			n = -1;
			break;
		}
		/* FIXME: progress reporting in percentage, can we get the length always?  do we care? */
		n = camel_stream_read (instream, buffer, sizeof (buffer), cancellable, NULL);
		if (n > 0) {
			nread += n;
			/* If we didn't get a valid Content-Length header, do not try to calculate percentage */
			if (total != 0) {
				pc_complete = ((nread * 100) / total);
				camel_operation_progress (cancellable, pc_complete);
			}
			d(printf("  read %d bytes\n", n));
			if (costream && camel_stream_write (costream, buffer, n, cancellable, NULL) == -1) {
				n = -1;
				break;
			}

			camel_stream_write (job->stream, buffer, n, cancellable, NULL);
		}
	} while (n > 0);

	/* indicates success */
	if (n == 0)
		camel_stream_close (job->stream, cancellable, NULL);

	if (costream) {
		/* do not store broken files in a cache */
		if (n != 0)
			camel_data_cache_remove (emfh_http_cache, EMFH_HTTP_CACHE_PATH, job->u.uri, NULL);
		g_object_unref (costream);
	}

	g_object_unref (instream);
done:
	camel_operation_pop_message (cancellable);
badurl:
	g_free (job->u.uri);
}

/* ********************************************************************** */

static void
efh_url_requested (GtkHTML *html,
                   const gchar *url,
                   GtkHTMLStream *handle,
                   EMFormatHTML *efh)
{
	EMFormatPURI *puri;
	struct _EMFormatHTMLJob *job = NULL;

	d(printf("url requested, html = %p, url '%s'\n", html, url));

	puri = em_format_find_visible_puri ((EMFormat *) efh, url);
	if (puri) {
		CamelDataWrapper *dw = camel_medium_get_content ((CamelMedium *) puri->part);
		CamelContentType *ct = dw ? dw->mime_type : NULL;

		/* GtkHTML only handles text and images.
		 * application/octet-stream parts are the only ones
		 * which are snooped for other content.  So only try
		 * to pass these to it - any other types are badly
		 * formed or intentionally malicious emails.  They
		 * will still show as attachments anyway */

		if (ct && (camel_content_type_is(ct, "text", "*")
			   || camel_content_type_is(ct, "image", "*")
			   || camel_content_type_is(ct, "application", "octet-stream"))) {
			puri->use_count++;

			d(printf(" adding puri job\n"));
			job = em_format_html_job_new (efh, emfh_getpuri, puri);
		} else {
			d(printf(" part is unknown type '%s', not using\n", ct?camel_content_type_format(ct):"<unset>"));
			gtk_html_stream_close (handle, GTK_HTML_STREAM_ERROR);
		}
	} else if (g_ascii_strncasecmp(url, "http:", 5) == 0 || g_ascii_strncasecmp(url, "https:", 6) == 0) {
		d(printf(" adding job, get %s\n", url));
		job = em_format_html_job_new (efh, emfh_gethttp, g_strdup (url));
	} else if  (g_str_has_prefix (url, "file://")) {
		gchar *data = NULL;
		gsize length = 0;
		gboolean status;
		gchar *path;

		path = g_filename_from_uri (url, NULL, NULL);
		g_return_if_fail (path != NULL);

		status = g_file_get_contents (path, &data, &length, NULL);
		if (status)
			gtk_html_stream_write (handle, data, length);

		gtk_html_stream_close (handle, status ? GTK_HTML_STREAM_OK : GTK_HTML_STREAM_ERROR);
		g_free (data);
		g_free (path);
	} else {
		d(printf("HTML Includes reference to unknown uri '%s'\n", url));
		gtk_html_stream_close (handle, GTK_HTML_STREAM_ERROR);
	}

	if (job) {
		job->stream = em_html_stream_new (html, handle);
		em_format_html_job_queue (efh, job);
	}

	g_signal_stop_emission_by_name (html, "url-requested");
}

static gboolean
efh_object_requested (GtkHTML *html,
                      GtkHTMLEmbedded *eb,
                      EMFormatHTML *efh)
{
	EMFormatHTMLPObject *pobject;
	gint res = FALSE;

	if (eb->classid == NULL)
		return FALSE;

	pobject = em_format_html_find_pobject (efh, eb->classid);
	if (pobject) {
		/* This stops recursion of the part */
		g_queue_remove (&efh->pending_object_list, pobject);
		res = pobject->func (efh, eb, pobject);
		g_queue_push_head (&efh->pending_object_list, pobject);
	} else {
		d(printf("HTML Includes reference to unknown object '%s'\n", eb->classid));
	}

	return res;
}

/* ********************************************************************** */
#include "em-format/em-inline-filter.h"

/* FIXME: This is duplicated in em-format-html-display, should be exported or in security module */
static const struct {
	const gchar *icon, *shortdesc;
} smime_sign_table[5] = {
	{ "stock_signature-bad", N_("Unsigned") },
	{ "stock_signature-ok", N_("Valid signature") },
	{ "stock_signature-bad", N_("Invalid signature") },
	{ "stock_signature", N_("Valid signature, but cannot verify sender") },
	{ "stock_signature-bad", N_("Signature exists, but need public key") },
};

static const struct {
	const gchar *icon, *shortdesc;
} smime_encrypt_table[4] = {
	{ "stock_lock-broken", N_("Unencrypted") },
	{ "stock_lock", N_("Encrypted, weak"),},
	{ "stock_lock-ok", N_("Encrypted") },
	{ "stock_lock-ok", N_("Encrypted, strong") },
};

static const gchar *smime_sign_colour[4] = {
	"", " bgcolor=\"#88bb88\"", " bgcolor=\"#bb8888\"", " bgcolor=\"#e8d122\""
};

/* TODO: this could probably be virtual on em-format-html
 * then we only need one version of each type handler */
static void
efh_format_secure (EMFormat *emf,
                   CamelStream *stream,
                   CamelMimePart *part,
                   CamelCipherValidity *valid,
                   GCancellable *cancellable)
{
	EMFormatClass *format_class;

	format_class = EM_FORMAT_CLASS (parent_class);
	g_return_if_fail (format_class->format_secure != NULL);
	format_class->format_secure (emf, stream, part, valid, cancellable);

	/* To explain, if the validity is the same, then we are the
	 * base validity and now have a combined sign/encrypt validity
	 * we can display.  Primarily a new verification context is
	 * created when we have an embeded message. */
	if (emf->valid == valid
	    && (valid->encrypt.status != CAMEL_CIPHER_VALIDITY_ENCRYPT_NONE
		|| valid->sign.status != CAMEL_CIPHER_VALIDITY_SIGN_NONE)) {
		gchar *classid, *iconpath;
		const gchar *icon;
		CamelMimePart *iconpart;
		GString *buffer;

		buffer = g_string_sized_new (1024);

		g_string_append_printf (
			buffer,
			"<table border=0 width=\"100%%\" "
			"cellpadding=3 cellspacing=0%s><tr>",
			smime_sign_colour[valid->sign.status]);

		classid = g_strdup_printf (
			"smime:///em-format-html/%s/icon/signed",
			emf->part_id->str);
		g_string_append_printf (
			buffer,
			"<td valign=\"top\"><img src=\"%s\"></td>"
			"<td valign=\"top\" width=\"100%%\">", classid);

		if (valid->sign.status != 0)
			icon = smime_sign_table[valid->sign.status].icon;
		else
			icon = smime_encrypt_table[valid->encrypt.status].icon;
		iconpath = e_icon_factory_get_icon_filename (icon, GTK_ICON_SIZE_DIALOG);
		iconpart = em_format_html_file_part((EMFormatHTML *)emf, "image/png", iconpath, cancellable);
		if (iconpart) {
			(void) em_format_add_puri (emf, sizeof (EMFormatPURI), classid, iconpart, efh_write_image);
			g_object_unref (iconpart);
		}
		g_free (iconpath);
		g_free (classid);

		if (valid->sign.status != CAMEL_CIPHER_VALIDITY_SIGN_NONE) {
			g_string_append (
				buffer, _(smime_sign_table[valid->sign.status].shortdesc));

			em_format_html_format_cert_infos (
				&valid->sign.signers, buffer);
		}

		if (valid->encrypt.status != CAMEL_CIPHER_VALIDITY_ENCRYPT_NONE) {
			if (valid->sign.status != CAMEL_CIPHER_VALIDITY_SIGN_NONE)
				g_string_append (buffer, "<br>");

			g_string_append (
				buffer, _(smime_encrypt_table[valid->encrypt.status].shortdesc));
		}

		g_string_append (buffer, "</td></tr></table>");

		camel_stream_write (
			stream, buffer->str,
			buffer->len, cancellable, NULL);

		g_string_free (buffer, TRUE);
	}
}

static void
efh_text_plain (EMFormat *emf,
                CamelStream *stream,
                CamelMimePart *part,
                const EMFormatHandler *info,
                GCancellable *cancellable,
                gboolean is_fallback)
{
	EMFormatHTML *efh = EM_FORMAT_HTML (emf);
	CamelStream *filtered_stream;
	CamelMimeFilter *html_filter;
	CamelMultipart *mp;
	CamelDataWrapper *dw;
	CamelContentType *type;
	const gchar *format;
	guint32 flags;
	guint32 rgb;
	gint i, count, len;
	struct _EMFormatHTMLCache *efhc;

	flags = efh->text_html_flags;

	dw = camel_medium_get_content ((CamelMedium *) part);
	if (!dw)
		return;

	/* Check for RFC 2646 flowed text. */
	if (camel_content_type_is(dw->mime_type, "text", "plain")
	    && (format = camel_content_type_param(dw->mime_type, "format"))
	    && !g_ascii_strcasecmp(format, "flowed"))
		flags |= CAMEL_MIME_FILTER_TOHTML_FORMAT_FLOWED;

	/* This scans the text part for inline-encoded data, creates
	 * a multipart of all the parts inside it. */

	/* FIXME: We should discard this multipart if it only contains
	 * the original text, but it makes this hash lookup more complex */

	/* TODO: We could probably put this in the superclass, since
	 * no knowledge of html is required - but this messes with
	 * filters a bit.  Perhaps the superclass should just deal with
	 * html anyway and be done with it ... */

	efhc = g_hash_table_lookup (
		efh->priv->text_inline_parts,
		emf->part_id->str);

	if (efhc == NULL || (mp = efhc->textmp) == NULL) {
		EMInlineFilter *inline_filter;
		CamelStream *null;
		CamelContentType *ct;
		gboolean charset_added = FALSE;

		/* if we had to snoop the part type to get here, then
		 * use that as the base type, yuck */
		if (emf->snoop_mime_type == NULL
		    || (ct = camel_content_type_decode (emf->snoop_mime_type)) == NULL) {
			ct = dw->mime_type;
			camel_content_type_ref (ct);
		}

		if (dw->mime_type && ct != dw->mime_type && camel_content_type_param (dw->mime_type, "charset")) {
			camel_content_type_set_param (ct, "charset", camel_content_type_param (dw->mime_type, "charset"));
			charset_added = TRUE;
		}

		null = camel_stream_null_new ();
		filtered_stream = camel_stream_filter_new (null);
		g_object_unref (null);
		inline_filter = em_inline_filter_new (camel_mime_part_get_encoding (part), ct);
		camel_stream_filter_add (
			CAMEL_STREAM_FILTER (filtered_stream),
			CAMEL_MIME_FILTER (inline_filter));
		camel_data_wrapper_decode_to_stream_sync (
			dw, (CamelStream *) filtered_stream, cancellable, NULL);
		camel_stream_close ((CamelStream *) filtered_stream, cancellable, NULL);
		g_object_unref (filtered_stream);

		mp = em_inline_filter_get_multipart (inline_filter);
		if (efhc == NULL)
			efhc = efh_insert_cache (efh, emf->part_id->str);
		efhc->textmp = mp;

		if (charset_added) {
			camel_content_type_set_param (ct, "charset", NULL);
		}

		g_object_unref (inline_filter);
		camel_content_type_unref (ct);
	}

	rgb = e_color_to_value (
		&efh->priv->colors[EM_FORMAT_HTML_COLOR_CITATION]);
	filtered_stream = camel_stream_filter_new (stream);
	html_filter = camel_mime_filter_tohtml_new (flags, rgb);
	camel_stream_filter_add (
		CAMEL_STREAM_FILTER (filtered_stream), html_filter);
	g_object_unref (html_filter);

	/* We handle our made-up multipart here, so we don't recursively call ourselves */

	len = emf->part_id->len;
	count = camel_multipart_get_number (mp);
	for (i = 0; i < count; i++) {
		CamelMimePart *newpart = camel_multipart_get_part (mp, i);

		if (!newpart)
			continue;

		type = camel_mime_part_get_content_type (newpart);
		if (camel_content_type_is (type, "text", "*") && (is_fallback || !camel_content_type_is (type, "text", "calendar"))) {
			gchar *content;

			content = g_strdup_printf (
				"<div style=\"border: solid #%06x 1px; "
				"background-color: #%06x; padding: 10px; "
				"color: #%06x;\">\n<tt>\n" EFH_MESSAGE_START,
				e_color_to_value (
					&efh->priv->colors[
					EM_FORMAT_HTML_COLOR_FRAME]),
				e_color_to_value (
					&efh->priv->colors[
					EM_FORMAT_HTML_COLOR_CONTENT]),
				e_color_to_value (
					&efh->priv->colors[
					EM_FORMAT_HTML_COLOR_TEXT]));
			camel_stream_write_string (
				stream, content, cancellable, NULL);
			g_free (content);

			em_format_format_text (
				emf, filtered_stream,
				(CamelDataWrapper *) newpart,
				cancellable);
			camel_stream_flush ((CamelStream *) filtered_stream, cancellable, NULL);
			camel_stream_write_string (stream, "</tt>\n", cancellable, NULL);
			camel_stream_write_string (stream, "</div>\n", cancellable, NULL);
		} else {
			g_string_append_printf (emf->part_id, ".inline.%d", i);
			em_format_part (
				emf, stream, newpart, cancellable);
			g_string_truncate (emf->part_id, len);
		}
	}

	g_object_unref (filtered_stream);
}

static void
efh_text_enriched (EMFormat *emf,
                   CamelStream *stream,
                   CamelMimePart *part,
                   const EMFormatHandler *info,
                   GCancellable *cancellable,
                   gboolean is_fallback)
{
	EMFormatHTML *efh = EM_FORMAT_HTML (emf);
	CamelStream *filtered_stream;
	CamelMimeFilter *enriched;
	guint32 flags = 0;
	gchar *content;

	if (!strcmp(info->mime_type, "text/richtext")) {
		flags = CAMEL_MIME_FILTER_ENRICHED_IS_RICHTEXT;
		camel_stream_write_string (
			stream, "\n<!-- text/richtext -->\n",
			cancellable, NULL);
	} else {
		camel_stream_write_string (
			stream, "\n<!-- text/enriched -->\n",
			cancellable, NULL);
	}

	enriched = camel_mime_filter_enriched_new (flags);
	filtered_stream = camel_stream_filter_new (stream);
	camel_stream_filter_add (
		CAMEL_STREAM_FILTER (filtered_stream), enriched);
	g_object_unref (enriched);

	content = g_strdup_printf (
		"<div style=\"border: solid #%06x 1px; "
		"background-color: #%06x; padding: 10px; "
		"color: #%06x;\">\n" EFH_MESSAGE_START,
		e_color_to_value (
			&efh->priv->colors[
			EM_FORMAT_HTML_COLOR_FRAME]),
		e_color_to_value (
			&efh->priv->colors[
			EM_FORMAT_HTML_COLOR_CONTENT]),
		e_color_to_value (
			&efh->priv->colors[
			EM_FORMAT_HTML_COLOR_TEXT]));
	camel_stream_write_string (stream, content, cancellable, NULL);
	g_free (content);

	em_format_format_text (
		emf, (CamelStream *) filtered_stream,
		(CamelDataWrapper *) part, cancellable);

	g_object_unref (filtered_stream);
	camel_stream_write_string (stream, "</div>", cancellable, NULL);
}

static void
efh_write_text_html (EMFormat *emf,
                     CamelStream *stream,
                     EMFormatPURI *puri,
                     GCancellable *cancellable)
{
#if d(!)0
	CamelStream *out;
	gint fd;
	CamelDataWrapper *dw;

	fd = dup (STDOUT_FILENO);
	out = camel_stream_fs_new_with_fd (fd);
	printf("writing text content to frame '%s'\n", puri->cid);
	dw = camel_medium_get_content (puri->part);
	if (dw)
		camel_data_wrapper_write_to_stream (dw, out);
	g_object_unref (out);
#endif
	em_format_format_text (
		emf, stream, (CamelDataWrapper *) puri->part, cancellable);
}

static void
efh_text_html (EMFormat *emf,
               CamelStream *stream,
               CamelMimePart *part,
               const EMFormatHandler *info,
               GCancellable *cancellable,
               gboolean is_fallback)
{
	EMFormatHTML *efh = EM_FORMAT_HTML (emf);
	const gchar *location;
	gchar *cid = NULL;
	gchar *content;

	content = g_strdup_printf (
		"<div style=\"border: solid #%06x 1px; "
		"background-color: #%06x; color: #%06x;\">\n"
		"<!-- text/html -->\n" EFH_MESSAGE_START,
		e_color_to_value (
			&efh->priv->colors[
			EM_FORMAT_HTML_COLOR_FRAME]),
		e_color_to_value (
			&efh->priv->colors[
			EM_FORMAT_HTML_COLOR_CONTENT]),
		e_color_to_value (
			&efh->priv->colors[
			EM_FORMAT_HTML_COLOR_TEXT]));
	camel_stream_write_string (stream, content, cancellable, NULL);
	g_free (content);

	/* TODO: perhaps we don't need to calculate this anymore now base is handled better */
	/* calculate our own location string so add_puri doesn't do it
	 * for us. our iframes are special cases, we need to use the
	 * proper base url to access them, but other children parts
	 * shouldn't blindly inherit the container's location. */
	location = camel_mime_part_get_content_location (part);
	if (location == NULL) {
		if (emf->base)
			cid = camel_url_to_string (emf->base, 0);
		else
			cid = g_strdup (emf->part_id->str);
	} else {
		if (strchr (location, ':') == NULL && emf->base != NULL) {
			CamelURL *uri;

			uri = camel_url_new_with_base (emf->base, location);
			cid = camel_url_to_string (uri, 0);
			camel_url_free (uri);
		} else {
			cid = g_strdup (location);
		}
	}

	em_format_add_puri (
		emf, sizeof (EMFormatPURI), cid,
		part, efh_write_text_html);
	d(printf("adding iframe, location %s\n", cid));
	content = g_strdup_printf (
		"<iframe src=\"%s\" frameborder=0 scrolling=no>"
		"could not get %s</iframe>\n</div>\n", cid, cid);
	camel_stream_write_string (stream, content, cancellable, NULL);
	g_free (content);
	g_free (cid);
}

/* This is a lot of code for something useless ... */
static void
efh_message_external (EMFormat *emf,
                      CamelStream *stream,
                      CamelMimePart *part,
                      const EMFormatHandler *info,
                      GCancellable *cancellable,
                      gboolean is_fallback)
{
	CamelContentType *type;
	const gchar *access_type;
	gchar *url = NULL, *desc = NULL;
	gchar *content;

	if (!part) {
		camel_stream_write_string (
			stream, _("Unknown external-body part."),
			cancellable, NULL);
		return;
	}

	/* needs to be cleaner */
	type = camel_mime_part_get_content_type (part);
	access_type = camel_content_type_param (type, "access-type");
	if (!access_type) {
		camel_stream_write_string (
			stream, _("Malformed external-body part."),
			cancellable, NULL);
		return;
	}

	if (!g_ascii_strcasecmp(access_type, "ftp") ||
	    !g_ascii_strcasecmp(access_type, "anon-ftp")) {
		const gchar *name, *site, *dir, *mode;
		gchar *path;
		gchar ftype[16];

		name = camel_content_type_param (type, "name");
		site = camel_content_type_param (type, "site");
		dir = camel_content_type_param (type, "directory");
		mode = camel_content_type_param (type, "mode");
		if (name == NULL || site == NULL)
			goto fail;

		/* Generate the path. */
		if (dir)
			path = g_strdup_printf("/%s/%s", *dir=='/'?dir+1:dir, name);
		else
			path = g_strdup_printf("/%s", *name=='/'?name+1:name);

		if (mode && *mode)
			sprintf(ftype, ";type=%c",  *mode);
		else
			ftype[0] = 0;

		url = g_strdup_printf ("ftp://%s%s%s", site, path, ftype);
		g_free (path);
		desc = g_strdup_printf (_("Pointer to FTP site (%s)"), url);
	} else if (!g_ascii_strcasecmp (access_type, "local-file")) {
		const gchar *name, *site;

		name = camel_content_type_param (type, "name");
		site = camel_content_type_param (type, "site");
		if (name == NULL)
			goto fail;

		url = g_filename_to_uri (name, NULL, NULL);
		if (site)
			desc = g_strdup_printf(_("Pointer to local file (%s) valid at site \"%s\""), name, site);
		else
			desc = g_strdup_printf(_("Pointer to local file (%s)"), name);
	} else if (!g_ascii_strcasecmp (access_type, "URL")) {
		const gchar *urlparam;
		gchar *s, *d;

		/* RFC 2017 */

		urlparam = camel_content_type_param (type, "url");
		if (urlparam == NULL)
			goto fail;

		/* For obscure MIMEy reasons, the URL may be split into words */
		url = g_strdup (urlparam);
		s = d = url;
		while (*s) {
			/* FIXME: use camel_isspace */
			if (!isspace ((guchar) * s))
				*d++ = *s;
			s++;
		}
		*d = 0;
		desc = g_strdup_printf (_("Pointer to remote data (%s)"), url);
	} else
		goto fail;

	content = g_strdup_printf ("<a href=\"%s\">%s</a>", url, desc);
	camel_stream_write_string (stream, content, cancellable, NULL);
	g_free (content);

	g_free (url);
	g_free (desc);

	return;

fail:
	content = g_strdup_printf (
		_("Pointer to unknown external data (\"%s\" type)"),
		access_type);
	camel_stream_write_string (stream, content, cancellable, NULL);
	g_free (content);
}

static void
efh_message_deliverystatus (EMFormat *emf,
                            CamelStream *stream,
                            CamelMimePart *part,
                            const EMFormatHandler *info,
                            GCancellable *cancellable,
                            gboolean is_fallback)
{
	EMFormatHTML *efh = EM_FORMAT_HTML (emf);
	CamelStream *filtered_stream;
	CamelMimeFilter *html_filter;
	guint32 rgb = 0x737373;
	gchar *content;

	/* Yuck, this is copied from efh_text_plain */
	content = g_strdup_printf (
		"<div style=\"border: solid #%06x 1px; "
		"background-color: #%06x; padding: 10px; "
		"color: #%06x;\">\n",
		e_color_to_value (
			&efh->priv->colors[
			EM_FORMAT_HTML_COLOR_FRAME]),
		e_color_to_value (
			&efh->priv->colors[
			EM_FORMAT_HTML_COLOR_CONTENT]),
		e_color_to_value (
			&efh->priv->colors[
			EM_FORMAT_HTML_COLOR_TEXT]));
	camel_stream_write_string (stream, content, cancellable, NULL);
	g_free (content);

	filtered_stream = camel_stream_filter_new (stream);
	html_filter = camel_mime_filter_tohtml_new (efh->text_html_flags, rgb);
	camel_stream_filter_add (
		CAMEL_STREAM_FILTER (filtered_stream), html_filter);
	g_object_unref (html_filter);

	camel_stream_write_string (stream, "<tt>\n" EFH_MESSAGE_START, cancellable, NULL);
	em_format_format_text (
		emf, filtered_stream,
		(CamelDataWrapper *) part, cancellable);
	camel_stream_flush (filtered_stream, cancellable, NULL);
	camel_stream_write_string (stream, "</tt>\n", cancellable, NULL);

	camel_stream_write_string (stream, "</div>", cancellable, NULL);
}

static void
emfh_write_related (EMFormat *emf,
                    CamelStream *stream,
                    EMFormatPURI *puri,
                    GCancellable *cancellable)
{
	em_format_format_content (emf, stream, puri->part, cancellable);

	camel_stream_close (stream, cancellable, NULL);
}

static void
emfh_multipart_related_check (struct _EMFormatHTMLJob *job,
                              GCancellable *cancellable)
{
	EMFormat *format;
	GList *link;
	gchar *oldpartid;

	if (g_cancellable_is_cancelled (cancellable))
		return;

	format = EM_FORMAT (job->format);

	d(printf(" running multipart/related check task\n"));
	oldpartid = g_strdup (format->part_id->str);

	link = g_queue_peek_head_link (job->puri_level->data);

	if (!link) {
		g_string_printf (format->part_id, "%s", oldpartid);
		g_free (oldpartid);
		return;
	}

	while (link != NULL) {
		EMFormatPURI *puri = link->data;

		if (puri->use_count == 0) {
			d(printf("part '%s' '%s' used '%d'\n", puri->uri?puri->uri:"", puri->cid, puri->use_count));
			if (puri->func == emfh_write_related) {
				g_string_printf (format->part_id, "%s", puri->part_id);
				/* FIXME Not passing a GCancellable here. */
				em_format_part (
					format, CAMEL_STREAM (job->stream),
					puri->part, NULL);
			}
			/* else it was probably added by a previous format this loop */
		}

		link = g_list_next (link);
	}

	g_string_printf (format->part_id, "%s", oldpartid);
	g_free (oldpartid);
}

/* RFC 2387 */
static void
efh_multipart_related (EMFormat *emf,
                       CamelStream *stream,
                       CamelMimePart *part,
                       const EMFormatHandler *info,
                       GCancellable *cancellable,
                       gboolean is_fallback)
{
	CamelMultipart *mp = (CamelMultipart *) camel_medium_get_content ((CamelMedium *) part);
	CamelMimePart *body_part, *display_part = NULL;
	CamelContentType *content_type;
	const gchar *start;
	gint i, nparts, partidlen, displayid = 0;
	struct _EMFormatHTMLJob *job;

	if (!CAMEL_IS_MULTIPART (mp)) {
		em_format_format_source (emf, stream, part, cancellable);
		return;
	}

	nparts = camel_multipart_get_number (mp);
	content_type = camel_mime_part_get_content_type (part);
	start = camel_content_type_param (content_type, "start");
	if (start && strlen (start) > 2) {
		gint len;
		const gchar *cid;

		/* strip <>'s */
		len = strlen (start) - 2;
		start++;

		for (i = 0; i < nparts; i++) {
			body_part = camel_multipart_get_part (mp, i);
			cid = camel_mime_part_get_content_id (body_part);

			if (cid && !strncmp (cid, start, len) && strlen (cid) == len) {
				display_part = body_part;
				displayid = i;
				break;
			}
		}
	} else {
		display_part = camel_multipart_get_part (mp, 0);
	}

	if (display_part == NULL) {
		em_format_part_as (
			emf, stream, part,
			"multipart/mixed", cancellable);
		return;
	}

	em_format_push_level (emf);

	partidlen = emf->part_id->len;

	/* queue up the parts for possible inclusion */
	for (i = 0; i < nparts; i++) {
		body_part = camel_multipart_get_part (mp, i);
		if (body_part != display_part) {
			g_string_append_printf(emf->part_id, "related.%d", i);
			em_format_add_puri (emf, sizeof (EMFormatPURI), NULL, body_part, emfh_write_related);
			g_string_truncate (emf->part_id, partidlen);
			d(printf(" part '%s' '%s' added\n", puri->uri?puri->uri:"", puri->cid));
		}
	}

	g_string_append_printf(emf->part_id, "related.%d", displayid);
	em_format_part (emf, stream, display_part, cancellable);
	g_string_truncate (emf->part_id, partidlen);
	camel_stream_flush (stream, cancellable, NULL);

	/* queue a job to check for un-referenced parts to add as attachments */
	job = em_format_html_job_new (
		EM_FORMAT_HTML (emf), emfh_multipart_related_check, NULL);
	job->stream = stream;
	g_object_ref (stream);
	em_format_html_job_queue ((EMFormatHTML *) emf, job);

	em_format_pull_level (emf);
}

static void
efh_write_image (EMFormat *emf,
                 CamelStream *stream,
                 EMFormatPURI *puri,
                 GCancellable *cancellable)
{
	CamelDataWrapper *dw = camel_medium_get_content ((CamelMedium *) puri->part);

	d(printf("writing image '%s'\n", puri->cid));
	camel_data_wrapper_decode_to_stream_sync (
		dw, stream, cancellable, NULL);
	camel_stream_close (stream, cancellable, NULL);
}

static void
efh_image (EMFormat *emf,
           CamelStream *stream,
           CamelMimePart *part,
           const EMFormatHandler *info,
           GCancellable *cancellable,
           gboolean is_fallback)
{
	EMFormatPURI *puri;
	gchar *content;

	puri = em_format_add_puri (
		emf, sizeof (EMFormatPURI), NULL, part, efh_write_image);

	content = g_strdup_printf (
		"<img hspace=10 vspace=10 src=\"%s\">", puri->cid);
	camel_stream_write_string (stream, content, cancellable, NULL);
	g_free (content);
}

/* Notes:
 *
 * image/tiff is omitted because it's a multi-page image format, but
 * gdk-pixbuf unconditionally renders the first page only, and doesn't
 * even indicate through meta-data whether multiple pages are present
 * (see bug 335959).  Therefore, make no attempt to render TIFF images
 * inline and defer to an application that can handle multi-page TIFF
 * files properly like Evince or Gimp.  Once the referenced bug is
 * fixed we can reevaluate this policy.
 */
static EMFormatHandler type_builtin_table[] = {
	{ (gchar *) "image/gif", efh_image },
	{ (gchar *) "image/jpeg", efh_image },
	{ (gchar *) "image/png", efh_image },
	{ (gchar *) "image/x-png", efh_image },
	{ (gchar *) "image/x-bmp", efh_image },
	{ (gchar *) "image/bmp", efh_image },
	{ (gchar *) "image/svg", efh_image },
	{ (gchar *) "image/x-cmu-raster", efh_image },
	{ (gchar *) "image/x-ico", efh_image },
	{ (gchar *) "image/x-portable-anymap", efh_image },
	{ (gchar *) "image/x-portable-bitmap", efh_image },
	{ (gchar *) "image/x-portable-graymap", efh_image },
	{ (gchar *) "image/x-portable-pixmap", efh_image },
	{ (gchar *) "image/x-xpixmap", efh_image },
	{ (gchar *) "text/enriched", efh_text_enriched },
	{ (gchar *) "text/plain", efh_text_plain },
	{ (gchar *) "text/html", efh_text_html },
	{ (gchar *) "text/richtext", efh_text_enriched },
	{ (gchar *) "text/*", efh_text_plain },
	{ (gchar *) "message/external-body", efh_message_external },
	{ (gchar *) "message/delivery-status", efh_message_deliverystatus },
	{ (gchar *) "multipart/related", efh_multipart_related },

	/* This is where one adds those busted, non-registered types,
	 * that some idiot mailer writers out there decide to pull out
	 * of their proverbials at random. */

	{ (gchar *) "image/jpg", efh_image },
	{ (gchar *) "image/pjpeg", efh_image },

	/* special internal types */

	{ (gchar *) "x-evolution/message/rfc822", efh_format_message }
};

static void
efh_builtin_init (EMFormatHTMLClass *efhc)
{
	EMFormatClass *efc;
	gint ii;

	efc = (EMFormatClass *) efhc;

	for (ii = 0; ii < G_N_ELEMENTS (type_builtin_table); ii++)
		em_format_class_add_handler (
			efc, &type_builtin_table[ii]);
}

/* ********************************************************************** */

static void
efh_format_text_header (EMFormatHTML *emfh,
                        GString *buffer,
                        const gchar *label,
                        const gchar *value,
                        guint32 flags)
{
	const gchar *fmt, *html;
	gchar *mhtml = NULL;
	gboolean is_rtl;

	if (value == NULL)
		return;

	while (*value == ' ')
		value++;

	if (!(flags & EM_FORMAT_HTML_HEADER_HTML))
		html = mhtml = camel_text_to_html (value, emfh->text_html_flags, 0);
	else
		html = value;

	is_rtl = gtk_widget_get_default_direction () == GTK_TEXT_DIR_RTL;
	if (emfh->simple_headers) {
		fmt = "<b>%s</b>: %s<br>";
	} else {
		if (flags & EM_FORMAT_HTML_HEADER_NOCOLUMNS) {
			if (flags & EM_FORMAT_HEADER_BOLD) {
				fmt = "<tr><td><b>%s:</b> %s</td></tr>";
			} else {
				fmt = "<tr><td>%s: %s</td></tr>";
			}
		} else if (flags & EM_FORMAT_HTML_HEADER_NODEC) {
			if (is_rtl)
				fmt = "<tr><td align=\"right\" valign=\"top\" width=\"100%%\">%2$s</td><th valign=top align=\"left\" nowrap>%1$s<b>&nbsp;</b></th></tr>";
			else
				fmt = "<tr><th align=\"right\" valign=\"top\" nowrap>%s<b>&nbsp;</b></th><td valign=top>%s</td></tr>";
		} else {

			if (flags & EM_FORMAT_HEADER_BOLD) {
				if (is_rtl)
					fmt = "<tr><td align=\"right\" valign=\"top\" width=\"100%%\">%2$s</td><th align=\"left\" nowrap>%1$s:<b>&nbsp;</b></th></tr>";
				else
					fmt = "<tr><th align=\"right\" valign=\"top\" nowrap>%s:<b>&nbsp;</b></th><td>%s</td></tr>";
			} else {
				if (is_rtl)
					fmt = "<tr><td align=\"right\" valign=\"top\" width=\"100%\">%2$s</td><td align=\"left\" nowrap>%1$s:<b>&nbsp;</b></td></tr>";
				else
					fmt = "<tr><td align=\"right\" valign=\"top\" nowrap>%s:<b>&nbsp;</b></td><td>%s</td></tr>";
			}
		}
	}

	g_string_append_printf (buffer, fmt, label, html);

	g_free (mhtml);
}

static const gchar *addrspec_hdrs[] = {
	"Sender", "From", "Reply-To", "To", "Cc", "Bcc",
	"Resent-Sender", "Resent-From", "Resent-Reply-To",
	"Resent-To", "Resent-Cc", "Resent-Bcc", NULL
};

static gchar *
efh_format_address (EMFormatHTML *efh,
                    GString *out,
                    struct _camel_header_address *a,
                    gchar *field)
{
	guint32 flags = CAMEL_MIME_FILTER_TOHTML_CONVERT_SPACES;
	gchar *name, *mailto, *addr;
	gint i = 0;
	gboolean wrap = FALSE;
	gchar *str = NULL;
	gint limit = mail_config_get_address_count ();

	if (field ) {
		if ((!strcmp (field, _("To")) && !(efh->header_wrap_flags & EM_FORMAT_HTML_HEADER_TO))
		    || (!strcmp (field, _("Cc")) && !(efh->header_wrap_flags & EM_FORMAT_HTML_HEADER_CC))
		    || (!strcmp (field, _("Bcc")) && !(efh->header_wrap_flags & EM_FORMAT_HTML_HEADER_BCC)))
		    wrap = TRUE;
	}

	while (a) {
		if (a->name)
			name = camel_text_to_html (a->name, flags, 0);
		else
			name = NULL;

		switch (a->type) {
		case CAMEL_HEADER_ADDRESS_NAME:
			if (name && *name) {
				gchar *real, *mailaddr;

				if (strchr (a->name, ',') || strchr (a->name, ';'))
					g_string_append_printf (out, "&quot;%s&quot;", name);
				else
					g_string_append (out, name);

				g_string_append (out, " &lt;");

				/* rfc2368 for mailto syntax and url encoding extras */
				if ((real = camel_header_encode_phrase ((guchar *) a->name))) {
					mailaddr = g_strdup_printf("%s <%s>", real, a->v.addr);
					g_free (real);
					mailto = camel_url_encode (mailaddr, "?=&()");
					g_free (mailaddr);
				} else {
					mailto = camel_url_encode (a->v.addr, "?=&()");
				}
			} else {
				mailto = camel_url_encode (a->v.addr, "?=&()");
			}
			addr = camel_text_to_html (a->v.addr, flags, 0);
			g_string_append_printf (out, "<a href=\"mailto:%s\">%s</a>", mailto, addr);
			g_free (mailto);
			g_free (addr);

			if (name && *name)
				g_string_append (out, "&gt;");
			break;
		case CAMEL_HEADER_ADDRESS_GROUP:
			g_string_append_printf (out, "%s: ", name);
			efh_format_address (efh, out, a->v.members, field);
			g_string_append_printf (out, ";");
			break;
		default:
			g_warning ("Invalid address type");
			break;
		}

		g_free (name);

		i++;
		a = a->next;
		if (a)
			g_string_append (out, ", ");

		/* Let us add a '...' if we have more addresses */
		if (limit > 0 && wrap && a && (i > (limit - 1))) {
			gchar *evolution_imagesdir = g_filename_to_uri (EVOLUTION_IMAGESDIR, NULL, NULL);

			if (!strcmp (field, _("To"))) {
				g_string_append (out, "<a href=\"##TO##\">...</a>");
				str = g_strdup_printf ("<a href=\"##TO##\"><img src=\"%s/plus.png\"></a>  ", evolution_imagesdir);
			}
			else if (!strcmp (field, _("Cc"))) {
				g_string_append (out, "<a href=\"##CC##\">...</a>");
				str = g_strdup_printf ("<a href=\"##CC##\"><img src=\"%s/plus.png\"></a>  ", evolution_imagesdir);
			}
			else if (!strcmp (field, _("Bcc"))) {
				g_string_append (out, "<a href=\"##BCC##\">...</a>");
				str = g_strdup_printf ("<a href=\"##BCC##\"><img src=\"%s/plus.png\"></a>  ", evolution_imagesdir);
			}

			g_free (evolution_imagesdir);

			if (str)
				return str;
		}

	}

	if (limit > 0 && i > (limit)) {
		gchar *evolution_imagesdir = g_filename_to_uri (EVOLUTION_IMAGESDIR, NULL, NULL);

		if (!strcmp (field, _("To"))) {
			str = g_strdup_printf ("<a href=\"##TO##\"><img src=\"%s/minus.png\"></a>  ", evolution_imagesdir);
		}
		else if (!strcmp (field, _("Cc"))) {
			str = g_strdup_printf ("<a href=\"##CC##\"><img src=\"%s/minus.png\"></a>  ", evolution_imagesdir);
		}
		else if (!strcmp (field, _("Bcc"))) {
			str = g_strdup_printf ("<a href=\"##BCC##\"><img src=\"%s/minus.png\"></a>  ", evolution_imagesdir);
		}

		g_free (evolution_imagesdir);
	}

	return str;

}

static void
canon_header_name (gchar *name)
{
	gchar *inptr = name;

	/* canonicalise the header name... first letter is
	 * capitalised and any letter following a '-' also gets
	 * capitalised */

	if (*inptr >= 'a' && *inptr <= 'z')
		*inptr -= 0x20;

	inptr++;

	while (*inptr) {
		if (inptr[-1] == '-' && *inptr >= 'a' && *inptr <= 'z')
			*inptr -= 0x20;
		else if (*inptr >= 'A' && *inptr <= 'Z')
			*inptr += 0x20;

		inptr++;
	}
}

static void
efh_format_header (EMFormat *emf,
                   GString *buffer,
                   CamelMedium *part,
                   struct _camel_header_raw *header,
                   guint32 flags,
                   const gchar *charset)
{
	EMFormatHTML *efh = (EMFormatHTML *) emf;
	gchar *name, *buf, *value = NULL;
	const gchar *label, *txt;
	gboolean addrspec = FALSE;
	gchar *str_field = NULL;
	gint i;

	name = g_alloca (strlen (header->name) + 1);
	strcpy (name, header->name);
	canon_header_name (name);

	for (i = 0; addrspec_hdrs[i]; i++) {
		if (!strcmp (name, addrspec_hdrs[i])) {
			addrspec = TRUE;
			break;
		}
	}

	label = _(name);

	if (addrspec) {
		struct _camel_header_address *addrs;
		GString *html;
		gchar *img;

		buf = camel_header_unfold (header->value);
		if (!(addrs = camel_header_address_decode (buf, emf->charset ? emf->charset : emf->default_charset))) {
			g_free (buf);
			return;
		}

		g_free (buf);

		html = g_string_new("");
		img = efh_format_address (efh, html, addrs, (gchar *) label);

		if (img) {
			str_field = g_strdup_printf ("%s%s:", img, label);
			label = str_field;
			flags |= EM_FORMAT_HTML_HEADER_NODEC;
			g_free (img);
		}

		camel_header_address_list_clear (&addrs);
		txt = value = html->str;
		g_string_free (html, FALSE);

		flags |= EM_FORMAT_HEADER_BOLD | EM_FORMAT_HTML_HEADER_HTML;
	} else if (!strcmp (name, "Subject")) {
		buf = camel_header_unfold (header->value);
		txt = value = camel_header_decode_string (buf, charset);
		g_free (buf);

		flags |= EM_FORMAT_HEADER_BOLD;
	} else if (!strcmp(name, "X-evolution-mailer")) {
		/* pseudo-header */
		label = _("Mailer");
		txt = value = camel_header_format_ctext (header->value, charset);
		flags |= EM_FORMAT_HEADER_BOLD;
	} else if (!strcmp (name, "Date") || !strcmp (name, "Resent-Date")) {
		gint msg_offset, local_tz;
		time_t msg_date;
		struct tm local;
		gchar *html;
		gboolean hide_real_date;

		hide_real_date = !em_format_html_get_show_real_date (efh);

		txt = header->value;
		while (*txt == ' ' || *txt == '\t')
			txt++;

		html = camel_text_to_html (txt, efh->text_html_flags, 0);

		msg_date = camel_header_decode_date (txt, &msg_offset);
		e_localtime_with_offset (msg_date, &local, &local_tz);

		/* Convert message offset to minutes (e.g. -0400 --> -240) */
		msg_offset = ((msg_offset / 100) * 60) + (msg_offset % 100);
		/* Turn into offset from localtime, not UTC */
		msg_offset -= local_tz / 60;

		/* value will be freed at the end */
		if (!hide_real_date && !msg_offset) {
			/* No timezone difference; just show the real Date: header */
			txt = value = html;
		} else {
			gchar *date_str;

			date_str = e_datetime_format_format ("mail", "header",
							     DTFormatKindDateTime, msg_date);

			if (hide_real_date) {
				/* Show only the local-formatted date, losing all timezone
				 * information like Outlook does. Should we attempt to show
				 * it somehow? */
				txt = value = date_str;
			} else {
				txt = value = g_strdup_printf ("%s (<I>%s</I>)", html, date_str);
				g_free (date_str);
			}
			g_free (html);
		}
		flags |= EM_FORMAT_HTML_HEADER_HTML | EM_FORMAT_HEADER_BOLD;
	} else if (!strcmp(name, "Newsgroups")) {
		struct _camel_header_newsgroup *ng, *scan;
		GString *html;

		buf = camel_header_unfold (header->value);

		if (!(ng = camel_header_newsgroups_decode (buf))) {
			g_free (buf);
			return;
		}

		g_free (buf);

		html = g_string_new("");
		scan = ng;
		while (scan) {
			g_string_append_printf(html, "<a href=\"news:%s\">%s</a>", scan->newsgroup, scan->newsgroup);
			scan = scan->next;
			if (scan)
				g_string_append_printf(html, ", ");
		}

		camel_header_newsgroups_free (ng);

		txt = html->str;
		g_string_free (html, FALSE);
		flags |= EM_FORMAT_HEADER_BOLD | EM_FORMAT_HTML_HEADER_HTML;
	} else if (!strcmp (name, "Received") || !strncmp (name, "X-", 2)) {
		/* don't unfold Received nor extension headers */
		txt = value = camel_header_decode_string (header->value, charset);
	} else {
		/* don't unfold Received nor extension headers */
		buf = camel_header_unfold (header->value);
		txt = value = camel_header_decode_string (buf, charset);
		g_free (buf);
	}

	efh_format_text_header (efh, buffer, label, txt, flags);

	g_free (value);
	g_free (str_field);
}

static void
efh_format_headers (EMFormatHTML *efh,
                    GString *buffer,
                    CamelMedium *part,
                    GCancellable *cancellable)
{
	EMFormat *emf = (EMFormat *) efh;
	const gchar *charset;
	CamelContentType *ct;
	struct _camel_header_raw *header;
	gboolean have_icon = FALSE;
	const gchar *photo_name = NULL;
	CamelInternetAddress *cia = NULL;
	gboolean face_decoded  = FALSE, contact_has_photo = FALSE;
	guchar *face_header_value = NULL;
	gsize face_header_len = 0;
	gchar *header_sender = NULL, *header_from = NULL, *name;
	gboolean mail_from_delegate = FALSE;
	const gchar *hdr_charset;
	gchar *evolution_imagesdir;

	if (!part)
		return;

	ct = camel_mime_part_get_content_type ((CamelMimePart *) part);
	charset = camel_content_type_param (ct, "charset");
	charset = camel_iconv_charset_name (charset);

	if (!efh->simple_headers)
		g_string_append_printf (
			buffer, "<font color=\"#%06x\">\n"
			"<table cellpadding=\"0\" width=\"100%%\">",
			e_color_to_value (
				&efh->priv->colors[
				EM_FORMAT_HTML_COLOR_HEADER]));

	hdr_charset = emf->charset ? emf->charset : emf->default_charset;
	evolution_imagesdir = g_filename_to_uri (EVOLUTION_IMAGESDIR, NULL, NULL);

	/* If the header is collapsed, display just subject and sender in one row and leave */
	if (efh->priv->headers_state == EM_FORMAT_HTML_HEADERS_STATE_COLLAPSED && efh->priv->headers_collapsable) {
		gchar *subject = NULL;
		struct _camel_header_address *addrs = NULL;
		GString *from = g_string_new ("");

		header = ((CamelMimePart *) part)->headers;
		while (header) {
			if (!g_ascii_strcasecmp (header->name, "From")) {
				GString *tmp;
				if (!(addrs = camel_header_address_decode (header->value, hdr_charset))) {
					header = header->next;
					continue;
				}
				tmp = g_string_new ("");
				efh_format_address (efh, tmp, addrs, header->name);

				if (tmp->len)
					g_string_printf (from, _("From: %s"), tmp->str);
				g_string_free (tmp, TRUE);
			} else if (!g_ascii_strcasecmp (header->name, "Subject")) {
				gchar *buf = NULL;
				buf = camel_header_unfold (header->value);
				g_free (subject);
				subject = camel_header_decode_string (buf, hdr_charset);
				g_free (buf);
			}
			header = header->next;
		}

		g_string_append_printf (
			buffer,
			"<tr>"
			"<td width=\"20\" valign=\"top\">"
			"<a href=\"##HEADERS##\">"
			"<img src=\"%s/plus.png\">"
			"</a></td>"
			"<td><strong>%s</strong> %s%s%s</td>"
			"</tr>",
			evolution_imagesdir,
			subject ? subject : _("(no subject)"),
			from->len ? "(" : "",
			from->str,
			from->len ? ")" : "");

		g_free (subject);
		if (addrs)
			camel_header_address_list_clear (&addrs);
		g_string_free (from, TRUE);

		g_string_append (buffer, "</table>");

		g_free (evolution_imagesdir);

		return;
	}

	header = ((CamelMimePart *) part)->headers;
	while (header) {
		if (!g_ascii_strcasecmp (header->name, "Sender")) {
			struct _camel_header_address *addrs;
			GString *html;

			if (!(addrs = camel_header_address_decode (header->value, hdr_charset)))
				break;

			html = g_string_new("");
			name = efh_format_address (efh, html, addrs, header->name);

			header_sender = html->str;
			camel_header_address_list_clear (&addrs);

			g_string_free (html, FALSE);
			g_free (name);
		} else if (!g_ascii_strcasecmp (header->name, "From")) {
			struct _camel_header_address *addrs;
			GString *html;

			if (!(addrs = camel_header_address_decode (header->value, hdr_charset)))
				break;

			html = g_string_new("");
			name = efh_format_address (efh, html, addrs, header->name);

			header_from = html->str;
			camel_header_address_list_clear (&addrs);

			g_string_free (html, FALSE);
			g_free (name);
		} else if (!g_ascii_strcasecmp (header->name, "X-Evolution-Mail-From-Delegate")) {
			mail_from_delegate = TRUE;
		}

		header = header->next;
	}

	if (header_sender && header_from && mail_from_delegate) {
		gchar *bold_sender, *bold_from;

		g_string_append (
			buffer,
			"<tr><td><table border=1 width=\"100%%\" "
			"cellspacing=2 cellpadding=2><tr>");
		if (gtk_widget_get_default_direction () == GTK_TEXT_DIR_RTL)
			g_string_append (
				buffer, "<td align=\"right\" width=\"100%%\">");
		else
			g_string_append (
				buffer, "<td align=\"left\" width=\"100%%\">");
		bold_sender = g_strconcat ("<b>", header_sender, "</b>", NULL);
		bold_from = g_strconcat ("<b>", header_from, "</b>", NULL);
		/* Translators: This message suggests to the receipients
		 * that the sender of the mail is different from the one
		 * listed in From field. */
		g_string_append_printf (
			buffer,
			_("This message was sent by %s on behalf of %s"),
			bold_sender, bold_from);
		g_string_append (buffer, "</td></tr></table></td></tr>");
		g_free (bold_sender);
		g_free (bold_from);
	}

	g_free (header_sender);
	g_free (header_from);

	if (gtk_widget_get_default_direction () == GTK_TEXT_DIR_RTL) {
		if (efh->priv->headers_collapsable)
			g_string_append_printf (
				buffer,
				"<tr>"
				"<td valign=\"top\" width=\"20\">"
				"<a href=\"##HEADERS##\">"
				"<img src=\"%s/minus.png\">"
				"</a></td>"
				"<td><table width=\"100%%\" border=0 "
				"cellpadding=\"0\">\n",
				evolution_imagesdir);
		else
			g_string_append (
				buffer,
				"<tr><td>"
				"<table width=\"100%%\" border=0 "
				"cellpadding=\"0\">\n");

	} else {
		if (efh->priv->headers_collapsable)
			g_string_append_printf (
				buffer,
				"<tr>"
				"<td valign=\"top\" width=\"20\">"
				"<a href=\"##HEADERS##\">"
				"<img src=\"%s/minus.png\">"
				"</a></td>"
				"<td><table border=0 cellpadding=\"0\">\n",
				evolution_imagesdir);
		else
			g_string_append (
				buffer,
 				"<tr><td>"
				"<table border=0 cellpadding=\"0\">\n");
	}

	g_free (evolution_imagesdir);

	/* dump selected headers */
	if (emf->mode == EM_FORMAT_MODE_ALLHEADERS) {
		header = ((CamelMimePart *) part)->headers;
		while (header) {
			efh_format_header (
				emf, buffer, part, header,
				EM_FORMAT_HTML_HEADER_NOCOLUMNS, charset);
			header = header->next;
		}
	} else {
		GList *link;
		gint mailer_shown = FALSE;

		link = g_queue_peek_head_link (&emf->header_list);

		while (link != NULL) {
			EMFormatHeader *h = link->data;
			gint mailer, face;

			header = ((CamelMimePart *) part)->headers;
			mailer = !g_ascii_strcasecmp (h->name, "X-Evolution-Mailer");
			face = !g_ascii_strcasecmp (h->name, "Face");

			while (header) {
				if (em_format_html_get_show_sender_photo (efh) &&
					!photo_name && !g_ascii_strcasecmp (header->name, "From"))
					photo_name = header->value;

				if (!mailer_shown && mailer && (
				    !g_ascii_strcasecmp (header->name, "X-Mailer") ||
				    !g_ascii_strcasecmp (header->name, "User-Agent") ||
				    !g_ascii_strcasecmp (header->name, "X-Newsreader") ||
				    !g_ascii_strcasecmp (header->name, "X-MimeOLE"))) {
					struct _camel_header_raw xmailer, *use_header = NULL;

					if (!g_ascii_strcasecmp (header->name, "X-MimeOLE")) {
						for (use_header = header->next; use_header; use_header = use_header->next) {
							if (!g_ascii_strcasecmp (use_header->name, "X-Mailer") ||
							    !g_ascii_strcasecmp (use_header->name, "User-Agent") ||
							    !g_ascii_strcasecmp (use_header->name, "X-Newsreader")) {
								/* even we have X-MimeOLE, then use rather the standard one, when available */
								break;
							}
						}
					}

					if (!use_header)
						use_header = header;

					xmailer.name = (gchar *) "X-Evolution-Mailer";
					xmailer.value = use_header->value;
					mailer_shown = TRUE;

					efh_format_header (
						emf, buffer, part,
						&xmailer, h->flags, charset);
					if (strstr(use_header->value, "Evolution"))
						have_icon = TRUE;
				} else if (!face_decoded && face && !g_ascii_strcasecmp (header->name, "Face")) {
					gchar *cp = header->value;

					/* Skip over spaces */
					while (*cp == ' ')
						cp++;

					face_header_value = g_base64_decode (
						cp, &face_header_len);
					face_header_value = g_realloc (
						face_header_value,
						face_header_len + 1);
					face_header_value[face_header_len] = 0;
					face_decoded = TRUE;
				/* Showing an encoded "Face" header makes little sense */
				} else if (!g_ascii_strcasecmp (header->name, h->name) && !face) {
					efh_format_header (
						emf, buffer, part,
						header, h->flags, charset);
				}

				header = header->next;
			}

			link = g_list_next (link);
		}
	}

	if (!efh->simple_headers) {
		g_string_append (buffer, "</table></td>");

		if (photo_name) {
			gchar *classid;
			CamelMimePart *photopart;
			gboolean only_local_photo;

			cia = camel_internet_address_new ();
			camel_address_decode ((CamelAddress *) cia, (const gchar *) photo_name);
			only_local_photo = em_format_html_get_only_local_photos (efh);
			photopart = em_utils_contact_photo (cia, only_local_photo);

			if (photopart) {
				contact_has_photo = TRUE;
				classid = g_strdup_printf (
					"icon:///em-format-html/%s/photo/header",
					emf->part_id->str);
				g_string_append_printf (
					buffer,
					"<td align=\"right\" valign=\"top\">"
					"<img width=64 src=\"%s\"></td>",
					classid);
				em_format_add_puri (emf, sizeof (EMFormatPURI), classid,
					photopart, efh_write_image);
				g_object_unref (photopart);

				g_free (classid);
			}
			g_object_unref (cia);
		}

		if (!contact_has_photo && face_decoded) {
			gchar *classid;
			CamelMimePart *part;

			part = camel_mime_part_new ();
			camel_mime_part_set_content (
				(CamelMimePart *) part,
				(const gchar *) face_header_value,
				face_header_len, "image/png");
			classid = g_strdup_printf (
				"icon:///em-format-html/face/photo/header");
			g_string_append_printf (
				buffer,
				"<td align=\"right\" valign=\"top\">"
				"<img width=48 src=\"%s\"></td>",
				classid);
			em_format_add_puri (
				emf, sizeof (EMFormatPURI),
				classid, part, efh_write_image);
			g_object_unref (part);
		}

		if (have_icon && efh->show_icon) {
			GtkIconInfo *icon_info;
			gchar *classid;
			CamelMimePart *iconpart = NULL;

			classid = g_strdup_printf (
				"icon:///em-format-html/%s/icon/header",
				emf->part_id->str);
			g_string_append_printf (
				buffer,
				"<td align=\"right\" valign=\"top\">"
				"<img width=16 height=16 src=\"%s\"></td>",
				classid);

			icon_info = gtk_icon_theme_lookup_icon (
				gtk_icon_theme_get_default (),
				"evolution", 16, GTK_ICON_LOOKUP_NO_SVG);
			if (icon_info != NULL) {
				iconpart = em_format_html_file_part (
					(EMFormatHTML *) emf, "image/png",
					gtk_icon_info_get_filename (icon_info),
					cancellable);
				gtk_icon_info_free (icon_info);
			}

			if (iconpart) {
				em_format_add_puri (
					emf, sizeof (EMFormatPURI),
					classid, iconpart, efh_write_image);
				g_object_unref (iconpart);
			}
			g_free (classid);
		}

		g_string_append (buffer, "</tr></table>\n</font>\n");
	}
}

static void
efh_format_message (EMFormat *emf,
                    CamelStream *stream,
                    CamelMimePart *part,
                    const EMFormatHandler *info,
                    GCancellable *cancellable,
                    gboolean is_fallback)
{
	const EMFormatHandler *handle;
	GString *buffer;

	/* TODO: make this validity stuff a method */
	EMFormatHTML *efh = (EMFormatHTML *) emf;
	CamelCipherValidity *save = emf->valid, *save_parent = emf->valid_parent;

	emf->valid = NULL;
	emf->valid_parent = NULL;

	buffer = g_string_sized_new (1024);

	if (emf->message != (CamelMimeMessage *) part)
		g_string_append (buffer, "<blockquote>\n");

	if (!efh->hide_headers)
		efh_format_headers (
			efh, buffer, CAMEL_MEDIUM (part), cancellable);

	camel_stream_write (
		stream, buffer->str, buffer->len, cancellable, NULL);

	g_string_free (buffer, TRUE);

	handle = em_format_find_handler(emf, "x-evolution/message/post-header");
	if (handle)
		handle->handler (
			emf, stream, part, handle, cancellable, FALSE);

	camel_stream_write_string (
		stream, EM_FORMAT_HTML_VPAD, cancellable, NULL);
	em_format_part (emf, stream, part, cancellable);

	if (emf->message != (CamelMimeMessage *) part)
		camel_stream_write_string (
			stream, "</blockquote>\n", cancellable, NULL);

	camel_cipher_validity_free (emf->valid);

	emf->valid = save;
	emf->valid_parent = save_parent;
}

void
em_format_html_format_cert_infos (GQueue *cert_infos,
                                  GString *output_buffer)
{
	GQueue valid = G_QUEUE_INIT;
	GList *head, *link;

	g_return_if_fail (cert_infos != NULL);
	g_return_if_fail (output_buffer != NULL);

	head = g_queue_peek_head_link (cert_infos);

	/* Make sure we have a valid CamelCipherCertInfo before
	 * appending anything to the output buffer, so we don't
	 * end up with "()". */
	for (link = head; link != NULL; link = g_list_next (link)) {
		CamelCipherCertInfo *cinfo = link->data;

		if ((cinfo->name != NULL && *cinfo->name != '\0') ||
		    (cinfo->email != NULL && *cinfo->email != '\0'))
			g_queue_push_tail (&valid, cinfo);
	}

	if (g_queue_is_empty (&valid))
		return;

	g_string_append (output_buffer, " (");

	while (!g_queue_is_empty (&valid)) {
		CamelCipherCertInfo *cinfo;

		cinfo = g_queue_pop_head (&valid);

		if (cinfo->name != NULL && *cinfo->name != '\0') {
			g_string_append (output_buffer, cinfo->name);

			if (cinfo->email != NULL && *cinfo->email != '\0') {
				g_string_append (output_buffer, " &lt;");
				g_string_append (output_buffer, cinfo->email);
				g_string_append (output_buffer, "&gt;");
			}

		} else if (cinfo->email != NULL && *cinfo->email != '\0') {
			g_string_append (output_buffer, cinfo->email);
		}

		if (!g_queue_is_empty (&valid))
			g_string_append (output_buffer, ", ");
	}

	g_string_append_c (output_buffer, ')');
}

/* unref returned pointer with g_object_unref(), if not NULL */
CamelStream *
em_format_html_get_cached_image (EMFormatHTML *efh,
                                 const gchar *image_uri)
{
	g_return_val_if_fail (efh != NULL, NULL);
	g_return_val_if_fail (image_uri != NULL, NULL);

	if (!emfh_http_cache)
		return NULL;

	return camel_data_cache_get (
		emfh_http_cache, EMFH_HTTP_CACHE_PATH, image_uri, NULL);
}