path: root/mail/em-format-html-display.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Authors: Michael Zucchi <notzed@ximian.com>
 *
 *  Copyright 2003 Ximian, Inc. (www.ximian.com)
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
 *
 */


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

#include <string.h>

#include <gtkhtml/gtkhtml.h>
#include <gtkhtml/htmlengine.h>
#include <gtkhtml/htmlobject.h>
#include <gtkhtml/htmliframe.h>
#include <gtkhtml/htmlinterval.h>
#include <gtkhtml/gtkhtml-embedded.h>
#include <gtkhtml/gtkhtml-search.h>

#include <gtk/gtkvbox.h>
#include <gtk/gtkhbox.h>
#include <gtk/gtkbutton.h>
#include <gtk/gtkstock.h>
#include <gtk/gtkimage.h>
#include <gtk/gtkarrow.h>

#include <gtk/gtkmenu.h>
#include <gtk/gtkmenuitem.h>

#include <glade/glade.h>

#include <libgnomevfs/gnome-vfs-mime-handlers.h>

#if 0
#include <libgnomevfs/gnome-vfs-utils.h>
#include <libgnomevfs/gnome-vfs-mime-utils.h>
#include <libgnomevfs/gnome-vfs-mime.h>
#endif

#include <bonobo/bonobo-control-frame.h>
#include <bonobo/bonobo-stream-memory.h>
#include <bonobo/bonobo-widget.h>

#include <camel/camel-stream.h>
#include <camel/camel-stream-mem.h>
#include <camel/camel-mime-filter-tohtml.h>
#include <camel/camel-mime-part.h>
#include <camel/camel-multipart.h>
#include <camel/camel-multipart-signed.h>
#include <camel/camel-internet-address.h>
#include <camel/camel-mime-message.h>
#include <camel/camel-gpg-context.h>

/* should this be in e-util rather than gal? */
#include <gal/util/e-util.h>

#include <e-util/e-msgport.h>
#include <e-util/e-gui-utils.h>
#include <e-util/e-dialog-utils.h>

#if defined(HAVE_NSS)
#include <camel/camel-smime-context.h>
#include "certificate-viewer.h"
#include "e-cert-db.h"
#endif

#include "mail-config.h"

#include "em-format-html-display.h"
#include "em-marshal.h"
#include "e-searching-tokenizer.h"
#include "em-icon-stream.h"
#include "em-utils.h"
#include "em-popup.h"
#include "em-icon-stream.h"

#define d(x)

#define EFHD_TABLE_OPEN "<table>"

struct _EMFormatHTMLDisplayPrivate {
    /* For the interactive search dialogue */
    /* TODO: Should this be more subtle, like the mozilla one? */
    GtkDialog *search_dialog;
    GtkWidget *search_entry;
    GtkWidget *search_matches_label;
    GtkWidget *search_case_check;
    char *search_text;
    int search_wrap;    /* are we doing a wrap search */
};

static int efhd_html_button_press_event (GtkWidget *widget, GdkEventButton *event, EMFormatHTMLDisplay *efh);
static void efhd_html_link_clicked (GtkHTML *html, const char *url, EMFormatHTMLDisplay *efhd);
static void efhd_html_on_url (GtkHTML *html, const char *url, EMFormatHTMLDisplay *efhd);

struct _attach_puri {
    EMFormatPURI puri;

    const EMFormatHandler *handle;

    /* for the > and V buttons */
    GtkWidget *forward, *down;
    /* currently no way to correlate this data to the frame :( */
    GtkHTML *frame;
    CamelStream *output;
    unsigned int shown:1;
};

static void efhd_iframe_created(GtkHTML *html, GtkHTML *iframe, EMFormatHTMLDisplay *efh);
/*static void efhd_url_requested(GtkHTML *html, const char *url, GtkHTMLStream *handle, EMFormatHTMLDisplay *efh);
  static gboolean efhd_object_requested(GtkHTML *html, GtkHTMLEmbedded *eb, EMFormatHTMLDisplay *efh);*/

static const EMFormatHandler *efhd_find_handler(EMFormat *emf, const char *mime_type);
static void efhd_format_clone(EMFormat *, CamelFolder *folder, const char *, CamelMimeMessage *msg, EMFormat *);
static void efhd_format_prefix(EMFormat *emf, CamelStream *stream);
static void efhd_format_error(EMFormat *emf, CamelStream *stream, const char *txt);
static void efhd_format_message(EMFormat *, CamelStream *, CamelMedium *);
static void efhd_format_source(EMFormat *, CamelStream *, CamelMimePart *);
static void efhd_format_attachment(EMFormat *, CamelStream *, CamelMimePart *, const char *, const EMFormatHandler *);
static void efhd_complete(EMFormat *);

static gboolean efhd_bonobo_object(EMFormatHTML *efh, GtkHTMLEmbedded *eb, EMFormatHTMLPObject *pobject);
static gboolean efhd_use_component(const char *mime_type);

static void efhd_builtin_init(EMFormatHTMLDisplayClass *efhc);

enum {
    EFHD_LINK_CLICKED,
    EFHD_POPUP_EVENT,
    EFHD_ON_URL,
    EFHD_LAST_SIGNAL,
};

static guint efhd_signals[EFHD_LAST_SIGNAL] = { 0 };

/* EMFormatHandler's for bonobo objects */
static GHashTable *efhd_bonobo_handlers;
static EMFormatHTMLClass *efhd_parent;

static void
efhd_gtkhtml_realise(GtkHTML *html, EMFormatHTMLDisplay *efhd)
{
    GtkStyle *style;

    /* FIXME: does this have to be re-done every time we draw? */

    /* My favorite thing to do... muck around with colors so we respect people's stupid themes.
       However, we only do this if we are rendering to the screen -- we ignore the theme
       when we are printing. */
    style = gtk_widget_get_style((GtkWidget *)html);
    if (style) {
        int state = GTK_WIDGET_STATE(html);
        gushort r, g, b;
#define SCALE (238)

        /* choose a suitably darker or lighter colour */
        r = style->base[state].red >> 8;
        g = style->base[state].green >> 8;
        b = style->base[state].blue >> 8;

        if (r+b+g > 128*3) {
            r = (r*SCALE) >> 8;
            g = (g*SCALE) >> 8;
            b = (b*SCALE) >> 8;
        } else {
            r = 128 - ((SCALE * r) >> 9);
            g = 128 - ((SCALE * g) >> 9);
            b = 128 - ((SCALE * b) >> 9);
        }

        efhd->formathtml.body_colour = ((r<<16) | (g<< 8) | b) & 0xffffff;
        
#undef SCALE
#define SCALE (174)
        /* choose a suitably darker or lighter colour */
        r = style->base[state].red >> 8;
        g = style->base[state].green >> 8;
        b = style->base[state].blue >> 8;

        if (r+b+g > 128*3) {
            r = (r*SCALE) >> 8;
            g = (g*SCALE) >> 8;
            b = (b*SCALE) >> 8;
        } else {
            r = 128 - ((SCALE * r) >> 9);
            g = 128 - ((SCALE * g) >> 9);
            b = 128 - ((SCALE * b) >> 9);
        }

        efhd->formathtml.frame_colour = ((r<<16) | (g<< 8) | b) & 0xffffff;

        r = style->base[GTK_STATE_NORMAL].red >> 8;
        g = style->base[GTK_STATE_NORMAL].green >> 8;
        b = style->base[GTK_STATE_NORMAL].blue >> 8;

        efhd->formathtml.content_colour = ((r<<16) | (g<< 8) | b) & 0xffffff;

        r = style->text[state].red >> 8;
        g = style->text[state].green >> 8;
        b = style->text[state].blue >> 8;

        efhd->formathtml.text_colour = ((r<<16) | (g<< 8) | b) & 0xffffff;
    }
#undef SCALE
}

static void
efhd_init(GObject *o)
{
    EMFormatHTMLDisplay *efhd = (EMFormatHTMLDisplay *)o;
#define efh ((EMFormatHTML *)efhd)

    efhd->priv = g_malloc0(sizeof(*efhd->priv));

    efhd->search_tok = (ESearchingTokenizer *)e_searching_tokenizer_new();
    html_engine_set_tokenizer(efh->html->engine, (HTMLTokenizer *)efhd->search_tok);

    g_signal_connect(efh->html, "realize", G_CALLBACK(efhd_gtkhtml_realise), o);

    /* we want to convert url's etc */
    efh->text_html_flags |= CAMEL_MIME_FILTER_TOHTML_CONVERT_URLS | CAMEL_MIME_FILTER_TOHTML_CONVERT_ADDRESSES;
#undef efh
}

static void
efhd_finalise(GObject *o)
{
    EMFormatHTMLDisplay *efhd = (EMFormatHTMLDisplay *)o;

    /* check pending stuff */

    g_free(efhd->priv->search_text);
    g_free(efhd->priv);

    ((GObjectClass *)efhd_parent)->finalize(o);
}

static gboolean
efhd_bool_accumulator(GSignalInvocationHint *ihint, GValue *out, const GValue *in, void *data)
{
    gboolean val = g_value_get_boolean(in);

    g_value_set_boolean(out, val);

    return !val;
}

static void
efhd_class_init(GObjectClass *klass)
{
    ((EMFormatClass *)klass)->find_handler = efhd_find_handler;
    ((EMFormatClass *)klass)->format_clone = efhd_format_clone;
    ((EMFormatClass *)klass)->format_prefix = efhd_format_prefix;
    ((EMFormatClass *)klass)->format_error = efhd_format_error;
    ((EMFormatClass *)klass)->format_message = efhd_format_message;
    ((EMFormatClass *)klass)->format_source = efhd_format_source;
    ((EMFormatClass *)klass)->format_attachment = efhd_format_attachment;
    ((EMFormatClass *)klass)->complete = efhd_complete;

    klass->finalize = efhd_finalise;

    efhd_signals[EFHD_LINK_CLICKED] = 
        g_signal_new("link_clicked",
                 G_TYPE_FROM_CLASS(klass),
                 G_SIGNAL_RUN_LAST,
                 G_STRUCT_OFFSET(EMFormatHTMLDisplayClass, link_clicked),
                 NULL, NULL,
                 g_cclosure_marshal_VOID__POINTER,
                 G_TYPE_NONE, 1, G_TYPE_POINTER);

    efhd_signals[EFHD_POPUP_EVENT] = 
        g_signal_new("popup_event",
                 G_TYPE_FROM_CLASS(klass),
                 G_SIGNAL_RUN_LAST,
                 G_STRUCT_OFFSET(EMFormatHTMLDisplayClass, popup_event),
                 efhd_bool_accumulator, NULL,
                 em_marshal_BOOLEAN__BOXED_POINTER_POINTER,
                 G_TYPE_BOOLEAN, 3,
                 GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE,
                 G_TYPE_POINTER, G_TYPE_POINTER);

    efhd_signals[EFHD_ON_URL] = 
        g_signal_new("on_url",
                 G_TYPE_FROM_CLASS(klass),
                 G_SIGNAL_RUN_LAST,
                 G_STRUCT_OFFSET(EMFormatHTMLDisplayClass, on_url),
                 NULL, NULL,
                 gtk_marshal_VOID__STRING,
                 G_TYPE_NONE, 1,
                 G_TYPE_STRING);

    efhd_builtin_init((EMFormatHTMLDisplayClass *)klass);
}

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

    if (type == 0) {
        static const GTypeInfo info = {
            sizeof(EMFormatHTMLDisplayClass),
            NULL, NULL,
            (GClassInitFunc)efhd_class_init,
            NULL, NULL,
            sizeof(EMFormatHTMLDisplay), 0,
            (GInstanceInitFunc)efhd_init
        };
        efhd_parent = g_type_class_ref(em_format_html_get_type());
        type = g_type_register_static(em_format_html_get_type(), "EMFormatHTMLDisplay", &info, 0);

        efhd_bonobo_handlers = g_hash_table_new(g_str_hash, g_str_equal);
    }

    return type;
}

EMFormatHTMLDisplay *em_format_html_display_new(void)
{
    EMFormatHTMLDisplay *efhd;

    efhd = g_object_new(em_format_html_display_get_type(), 0);

    g_signal_connect(efhd->formathtml.html, "iframe_created", G_CALLBACK(efhd_iframe_created), efhd);
    g_signal_connect(efhd->formathtml.html, "link_clicked", G_CALLBACK(efhd_html_link_clicked), efhd);
    g_signal_connect(efhd->formathtml.html, "on_url", G_CALLBACK(efhd_html_on_url), efhd);
    g_signal_connect(efhd->formathtml.html, "button_press_event", G_CALLBACK(efhd_html_button_press_event), efhd);

    return efhd;
}

void em_format_html_display_goto_anchor(EMFormatHTMLDisplay *efhd, const char *name)
{
    printf("FIXME: go to anchor '%s'\n", name);
}

void em_format_html_display_set_animate(EMFormatHTMLDisplay *efhd, gboolean state)
{
    efhd->animate = state;
    gtk_html_set_animate(((EMFormatHTML *)efhd)->html, state);
}

void em_format_html_display_set_caret_mode(EMFormatHTMLDisplay *efhd, gboolean state)
{
    efhd->caret_mode = state;
    gtk_html_set_caret_mode(((EMFormatHTML *)efhd)->html, state);
}

void
em_format_html_display_set_search(EMFormatHTMLDisplay *efhd, int type, GSList *strings)
{
    switch(type&3) {
    case EM_FORMAT_HTML_DISPLAY_SEARCH_PRIMARY:
        e_searching_tokenizer_set_primary_case_sensitivity(efhd->search_tok, (type&EM_FORMAT_HTML_DISPLAY_SEARCH_ICASE) == 0);
        e_searching_tokenizer_set_primary_search_string(efhd->search_tok, NULL);
        while (strings) {
            e_searching_tokenizer_add_primary_search_string(efhd->search_tok, strings->data);
            strings = strings->next;
        }
        break;
    case EM_FORMAT_HTML_DISPLAY_SEARCH_SECONDARY:
    default:
        e_searching_tokenizer_set_secondary_case_sensitivity(efhd->search_tok, (type&EM_FORMAT_HTML_DISPLAY_SEARCH_ICASE) == 0);
        e_searching_tokenizer_set_secondary_search_string(efhd->search_tok, NULL);
        while (strings) {
            e_searching_tokenizer_add_secondary_search_string(efhd->search_tok, strings->data);
            strings = strings->next;
        }
        break;
    }

    d(printf("redrawing with search\n"));
    em_format_redraw((EMFormat *)efhd);
}

static void
efhd_update_matches(EMFormatHTMLDisplay *efhd)
{
    struct _EMFormatHTMLDisplayPrivate *p = efhd->priv;
    char *str;
    /* message-search popup match count string */
    char *fmt = _("Matches: %d");

    if (p->search_dialog) {
        str = alloca(strlen(fmt)+32);
        sprintf(str, fmt, e_searching_tokenizer_match_count(efhd->search_tok));
        gtk_label_set_text((GtkLabel *)p->search_matches_label, str);
    }
}

static void
efhd_update_search(EMFormatHTMLDisplay *efhd)
{
    struct _EMFormatHTMLDisplayPrivate *p = efhd->priv;
    GSList *words = NULL;
    int flags = 0;

    if (p->search_text == NULL)
        return;

    if (!gtk_toggle_button_get_active((GtkToggleButton *)p->search_case_check))
        flags = EM_FORMAT_HTML_DISPLAY_SEARCH_ICASE | EM_FORMAT_HTML_DISPLAY_SEARCH_PRIMARY;
    else
        flags = EM_FORMAT_HTML_DISPLAY_SEARCH_PRIMARY;

    if (p->search_text)
        words = g_slist_append(words, p->search_text);

    em_format_html_display_set_search(efhd, flags, words);
    g_slist_free(words);
}

static void
efhd_search_response(GtkWidget *w, int button, EMFormatHTMLDisplay *efhd)
{
    struct _EMFormatHTMLDisplayPrivate *p = efhd->priv;

    if (button == GTK_RESPONSE_ACCEPT) {
        char *txt = g_strdup(gtk_entry_get_text((GtkEntry *)p->search_entry));

        g_strstrip(txt);
        if (p->search_text && strcmp(p->search_text, txt) == 0 && !p->search_wrap) {
            if (!gtk_html_engine_search_next(((EMFormatHTML *)efhd)->html))
                p->search_wrap = TRUE;
            g_free(txt);
        } else {
            g_free(p->search_text);
            p->search_text = txt;
            if (!p->search_wrap)
                efhd_update_search(efhd);
            p->search_wrap = FALSE;
            gtk_html_engine_search(((EMFormatHTML *)efhd)->html, txt,
                           gtk_toggle_button_get_active((GtkToggleButton *)p->search_case_check),
                           TRUE, FALSE);
        }
    } else {
        g_free(p->search_text);
        p->search_text = NULL;
        gtk_widget_destroy((GtkWidget *)p->search_dialog);
        p->search_dialog = NULL;
    }
}

static void
efhd_search_case_toggled(GtkWidget *w, EMFormatHTMLDisplay *efhd)
{
    struct _EMFormatHTMLDisplayPrivate *p = efhd->priv;

    g_free(p->search_text);
    p->search_text = NULL;
    efhd_search_response(w, GTK_RESPONSE_ACCEPT, efhd);
}

static void
efhd_search_entry_activate(GtkWidget *w, EMFormatHTMLDisplay *efhd)
{
    efhd_search_response(w, GTK_RESPONSE_ACCEPT, efhd);
}

/**
 * em_format_html_display_search:
 * @efhd: 
 * 
 * Run an interactive search dialogue.
 **/
void
em_format_html_display_search(EMFormatHTMLDisplay *efhd)
{
    struct _EMFormatHTMLDisplayPrivate *p = efhd->priv;
    GladeXML *xml;

    if (p->search_dialog) {
        gdk_window_raise(((GtkWidget *)p->search_dialog)->window);
        return;
    }

    xml = glade_xml_new (EVOLUTION_GLADEDIR "/mail-search.glade", "search_message_dialog", NULL);
    if (xml == NULL) {
        g_warning("Cannot open search dialog glade file");
        /* ?? */
        return;
    }

    /* TODO: The original put the subject in the frame, but it had some
       ugly arbitrary string-cutting code to make sure it fit. */

    p->search_dialog = (GtkDialog *)glade_xml_get_widget(xml, "search_message_dialog");
    p->search_entry = glade_xml_get_widget(xml, "search_entry");
    p->search_matches_label = glade_xml_get_widget(xml, "search_matches_label");
    p->search_case_check = glade_xml_get_widget(xml, "search_case_check");
    p->search_wrap = FALSE;

    gtk_dialog_set_default_response((GtkDialog *)p->search_dialog, GTK_RESPONSE_ACCEPT);
    efhd_update_matches(efhd);

    g_signal_connect(p->search_entry, "activate", G_CALLBACK(efhd_search_entry_activate), efhd);
    g_signal_connect(p->search_case_check, "toggled", G_CALLBACK(efhd_search_case_toggled), efhd);
    g_signal_connect(p->search_dialog, "response", G_CALLBACK(efhd_search_response), efhd);
    e_dialog_set_transient_for((GtkWindow *)p->search_dialog, (GtkWidget *)efhd);
    gtk_widget_show((GtkWidget *)p->search_dialog);
}

void
em_format_html_display_cut (EMFormatHTMLDisplay *efhd)
{
    gtk_html_cut (((EMFormatHTML *) efhd)->html);
}

void
em_format_html_display_copy (EMFormatHTMLDisplay *efhd)
{
    gtk_html_copy (((EMFormatHTML *) efhd)->html);
}

void
em_format_html_display_paste (EMFormatHTMLDisplay *efhd)
{
    gtk_html_paste (((EMFormatHTML *) efhd)->html, FALSE);
}

void
em_format_html_display_zoom_in (EMFormatHTMLDisplay *efhd)
{
    gtk_html_zoom_in (((EMFormatHTML *) efhd)->html);
}

void
em_format_html_display_zoom_out (EMFormatHTMLDisplay *efhd)
{
    gtk_html_zoom_out (((EMFormatHTML *) efhd)->html);
}

void
em_format_html_display_zoom_reset (EMFormatHTMLDisplay *efhd)
{
    gtk_html_zoom_reset (((EMFormatHTML *) efhd)->html);
}

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

static void
efhd_iframe_created(GtkHTML *html, GtkHTML *iframe, EMFormatHTMLDisplay *efh)
{
    d(printf("Iframe created %p ... \n", iframe));

    g_signal_connect(iframe, "button_press_event", G_CALLBACK (efhd_html_button_press_event), efh);

    return;
}

static int
efhd_html_button_press_event (GtkWidget *widget, GdkEventButton *event, EMFormatHTMLDisplay *efhd)
{
    HTMLEngine *e;
    HTMLObject *obj;
    const char *url;
    gboolean res = FALSE;
    gint offset;

    if (event->button != 3)
        return FALSE;

    e = ((GtkHTML *)widget)->engine;
    obj = html_engine_get_object_at(e, event->x, event->y, &offset, FALSE);
    if (obj == NULL)
        return FALSE;

    d(printf("popup button pressed\n"));

    if ( (url = html_object_get_src(obj)) != NULL
         || (url = html_object_get_url(obj, offset)) != NULL) {
        EMFormatPURI *puri;
        char *uri;

        uri = gtk_html_get_url_object_relative((GtkHTML *)widget, obj, url);
        puri = em_format_find_puri((EMFormat *)efhd, uri);

        d(printf("poup event, uri = '%s' part = '%p'\n", uri, puri?puri->part:NULL));

        g_signal_emit((GtkObject *)efhd, efhd_signals[EFHD_POPUP_EVENT], 0, event, uri, puri?puri->part:NULL, &res);
        g_free(uri);
    }

    return res;
}

static void
efhd_html_link_clicked (GtkHTML *html, const char *url, EMFormatHTMLDisplay *efhd)
{
    d(printf("link clicked event '%s'\n", url));
    g_signal_emit((GObject *)efhd, efhd_signals[EFHD_LINK_CLICKED], 0, url);
}

static void
efhd_html_on_url (GtkHTML *html, const char *url, EMFormatHTMLDisplay *efhd)
{
    d(printf("on_url event '%s'\n", url));
    g_signal_emit((GObject *)efhd, efhd_signals[EFHD_ON_URL], 0, url);
}

static void
efhd_complete(EMFormat *emf)
{
    EMFormatHTMLDisplay *efhd = (EMFormatHTMLDisplay *)emf;

    if (efhd->priv->search_dialog)
        efhd_update_matches(efhd);
}

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

/* TODO: rename some of this stuff, it isn't 'smime' specific */
/* TODO: move the dialogue elsehwere */
/* FIXME: also in em-format-html.c */
static const struct {
    const char *icon, *shortdesc, *description;
} smime_sign_table[4] = {
    { NULL, N_("Unsigned"), N_("This message is not signed.  There is no guarantee the sender of the message is authentic.") },
    { "pgp-signature-ok.png",N_("Valid signature"), N_("This message is signed and is valid, the sender of this message is very likely who they claim to be.") },
    { "pgp-signature-bad.png", N_("Invalid signature"), N_("The signature of this message cannot be verified, it may have been altered in transit.") },
    { "pgp-signature-nokey.png", N_("Valid signature, cannot verify sender"), N_("This message is signed with a valid signature, but the sender of the message cannot be verified.") },
};

static const struct {
    const char *icon, *shortdesc, *description;
} smime_encrypt_table[4] = {
    { NULL, N_("Unencrypted"), N_("This message is not encrypted.  Its content may be viewed in transit across the Internet.") },
    { "pgp-signature-ok.png", N_("Encrypted, weak"), N_("This message is encrypted, but with a weak encryption algorithm.  It would be difficult, but not impossible for an outsider to view the content of this message in a practical amount of time.") },
    { "pgp-signature-ok.png", N_("Encrypted"), N_("This message is encrypted.  It would be difficult for an outsider to view the content of this message.") },
    { "pgp-signature-ok.png", N_("Encrypted, strong"), N_("This message is encrypted, with a strong encryption algorithm.  It would be very difficult for an outsider to view the content of this message in a practical amount of time.") },
};

struct _smime_pobject {
    EMFormatHTMLPObject object;

    int signature;
    CamelCipherValidity *valid;
    GtkWidget *widget;
};

static void
efhd_xpkcs7mime_free(EMFormatHTMLPObject *o)
{
    struct _smime_pobject *po = (struct _smime_pobject *)o;

    if (po->widget)
        gtk_widget_destroy(po->widget);
    camel_cipher_validity_free(po->valid);
}

static void
efhd_xpkcs7mime_info_response(GtkWidget *w, guint button, struct _smime_pobject *po)
{
    gtk_widget_destroy(w);
    po->widget = NULL;
}

#if defined(HAVE_NSS)
static void
efhd_xpkcs7mime_viewcert_clicked(GtkWidget *button, struct _smime_pobject *po)
{
    CamelCipherCertInfo *info = g_object_get_data((GObject *)button, "e-cert-info");
    ECertDB *db = e_cert_db_peek();
    ECert *ec = NULL;

    if (info->email)
        ec = e_cert_db_find_cert_by_email_address(db, info->email, NULL);

    if (ec == NULL && info->name)
        ec = e_cert_db_find_cert_by_nickname(db, info->name, NULL);

    if (ec != NULL) {
        GtkWidget *w = certificate_viewer_show(ec);

        if (w && po->widget)
            gtk_window_set_transient_for((GtkWindow *)w, (GtkWindow *)po->widget);

        g_object_unref(ec);
    } else {
        g_warning("can't find certificate for %s <%s>", info->name?info->name:"", info->email?info->email:"");
    }
}
#endif

static void
efhd_xpkcs7mime_add_cert_table(GtkWidget *vbox, EDList *certlist, struct _smime_pobject *po)
{
    CamelCipherCertInfo *info = (CamelCipherCertInfo *)certlist->head;
    GtkTable *table = (GtkTable *)gtk_table_new(e_dlist_length(certlist), 2, FALSE);
    int n = 0;

    while (info->next) {
        char *la = NULL;
        const char *l = NULL;

        if (info->name) {
            if (info->email && strcmp(info->name, info->email) != 0)
                l = la = g_strdup_printf("%s <%s>", info->name, info->email);
            else
                l = info->name;
        } else {
            if (info->email)
                l = info->email;
        }
        
        if (l) {
            GtkWidget *w;

            w = gtk_label_new(l);
            gtk_misc_set_alignment((GtkMisc *)w, 0.0, 0.5);
            g_free(la);
            gtk_table_attach(table, w, 0, 1, n, n+1, GTK_FILL, GTK_FILL, 3, 3);
#if defined(HAVE_NSS)
            w = gtk_button_new_with_mnemonic(_("_View Certificate"));
            gtk_table_attach(table, w, 1, 2, n, n+1, 0, 0, 3, 3);
            g_object_set_data((GObject *)w, "e-cert-info", info);
            g_signal_connect(w, "clicked", G_CALLBACK(efhd_xpkcs7mime_viewcert_clicked), po);
#else
            w = gtk_label_new (_("This certificate is not viewable"));
            gtk_table_attach(table, w, 1, 2, n, n+1, 0, 0, 3, 3);
#endif
            n++;
        }
        
        info = info->next;
    }
    
    gtk_box_pack_start((GtkBox *)vbox, (GtkWidget *)table, TRUE, TRUE, 6);
}

static void
efhd_xpkcs7mime_validity_clicked(GtkWidget *button, EMFormatHTMLPObject *pobject)
{
    struct _smime_pobject *po = (struct _smime_pobject *)pobject;
    GladeXML *xml;
    GtkWidget *vbox, *w;

    if (po->widget)
        /* FIXME: window raise? */
        return;

    xml = glade_xml_new(EVOLUTION_GLADEDIR "/mail-security.glade", "message_security_dialog", NULL);
    po->widget = glade_xml_get_widget(xml, "message_security_dialog");

    vbox = glade_xml_get_widget(xml, "signature_vbox");
    w = gtk_label_new(_(smime_sign_table[po->valid->sign.status].description));
    gtk_misc_set_alignment((GtkMisc *)w, 0.0, 0.5);
    gtk_label_set_line_wrap((GtkLabel *)w, TRUE);
    gtk_box_pack_start((GtkBox *)vbox, w, TRUE, TRUE, 6);
    if (po->valid->sign.description) {
        w = gtk_label_new(po->valid->sign.description);
        gtk_misc_set_alignment((GtkMisc *)w, 0.0, 0.5);
        gtk_label_set_line_wrap((GtkLabel *)w, FALSE);
        gtk_box_pack_start((GtkBox *)vbox, w, TRUE, TRUE, 6);
    }

    if (!e_dlist_empty(&po->valid->sign.signers))
        efhd_xpkcs7mime_add_cert_table(vbox, &po->valid->sign.signers, po);

    gtk_widget_show_all(vbox);

    vbox = glade_xml_get_widget(xml, "encryption_vbox");
    w = gtk_label_new(_(smime_encrypt_table[po->valid->encrypt.status].description));
    gtk_misc_set_alignment((GtkMisc *)w, 0.0, 0.5);
    gtk_label_set_line_wrap((GtkLabel *)w, TRUE);
    gtk_box_pack_start((GtkBox *)vbox, w, TRUE, TRUE, 6);
    if (po->valid->encrypt.description) {
        w = gtk_label_new(po->valid->encrypt.description);
        gtk_misc_set_alignment((GtkMisc *)w, 0.0, 0.5);
        gtk_label_set_line_wrap((GtkLabel *)w, FALSE);
        gtk_box_pack_start((GtkBox *)vbox, w, TRUE, TRUE, 6);
    }

    if (!e_dlist_empty(&po->valid->encrypt.encrypters))
        efhd_xpkcs7mime_add_cert_table(vbox, &po->valid->encrypt.encrypters, po);

    gtk_widget_show_all(vbox);

    g_object_unref(xml);

    g_signal_connect(po->widget, "response", G_CALLBACK(efhd_xpkcs7mime_info_response), po);
    gtk_widget_show(po->widget);
}

static gboolean
efhd_xpkcs7mime_button(EMFormatHTML *efh, GtkHTMLEmbedded *eb, EMFormatHTMLPObject *pobject)
{
    GtkWidget *icon, *button;
    GdkPixbuf *pixbuf;
    struct _smime_pobject *po = (struct _smime_pobject *)pobject;
    char *file;
    const char *name;

    /* FIXME: need to have it based on encryption and signing too */
    if (po->valid->sign.status == CAMEL_CIPHER_VALIDITY_SIGN_GOOD)
        name = "pgp-signature-ok.png";
    else
        name = "pgp-signature-bad.png";

    file = g_build_filename(EVOLUTION_ICONSDIR, name, NULL);
    pixbuf = gdk_pixbuf_new_from_file(file, NULL);
    g_free(file);
    if (pixbuf == NULL)
        return FALSE;

    /* wtf isn't this just scaled on disk? */
    icon = gtk_image_new_from_pixbuf(gdk_pixbuf_scale_simple(pixbuf, 24, 24, GDK_INTERP_BILINEAR));
    g_object_unref(pixbuf);
    gtk_widget_show(icon);

    button = gtk_button_new();
    g_signal_connect(button, "clicked", G_CALLBACK(efhd_xpkcs7mime_validity_clicked), pobject);

    gtk_container_add((GtkContainer *)button, icon);
    gtk_widget_show(button);
    gtk_container_add((GtkContainer *)eb, button);

    return TRUE;
}

static void
efhd_output_secure(EMFormat *emf, CamelStream *stream, CamelMimePart *part, CamelCipherValidity *valid)
{
    CamelCipherValidity *save = ((EMFormatHTML *)emf)->valid_parent;
    int len;

    /* Note: this same logic is in efh_output_secure */
    if (((EMFormatHTML *)emf)->valid == NULL) {
        ((EMFormatHTML *)emf)->valid = valid;
    } else {
        e_dlist_addtail(&((EMFormatHTML *)emf)->valid_parent->children, (EDListNode *)valid);
        camel_cipher_validity_envelope(((EMFormatHTML *)emf)->valid_parent, valid);
    }

    ((EMFormatHTML *)emf)->valid_parent = valid;

    len = emf->part_id->len;
    g_string_append_printf(emf->part_id, ".signed");
    em_format_part(emf, stream, part);
    g_string_truncate(emf->part_id, len);

    ((EMFormatHTML *)emf)->valid_parent = save;

    if (((EMFormatHTML *)emf)->valid == valid
        && (valid->encrypt.status != CAMEL_CIPHER_VALIDITY_ENCRYPT_NONE
        || valid->sign.status != CAMEL_CIPHER_VALIDITY_SIGN_NONE)) {
        char *classid;
        struct _smime_pobject *pobj;

        camel_stream_printf(stream, "<table border=0 width=\"100%%\" cellpadding=3 cellspacing=0 bgcolor=%s><tr>",
                    valid->sign.status == CAMEL_CIPHER_VALIDITY_SIGN_GOOD?"#88bb88":"#bb8888");

        classid = g_strdup_printf("smime:///em-format-html/%s/icon/signed", emf->part_id->str);
        pobj = (struct _smime_pobject *)em_format_html_add_pobject((EMFormatHTML *)emf, sizeof(*pobj), classid, part, efhd_xpkcs7mime_button);
        pobj->valid = camel_cipher_validity_clone(valid);
        pobj->object.free = efhd_xpkcs7mime_free;
        camel_stream_printf(stream, "<td valign=top><object classid=\"%s\"></object></td><td width=100%% valign=top>", classid);

        if (valid->sign.status != CAMEL_CIPHER_VALIDITY_SIGN_NONE) {
            camel_stream_printf(stream, "%s<br>", _(smime_sign_table[valid->sign.status].shortdesc));
        }

        if (valid->encrypt.status != CAMEL_CIPHER_VALIDITY_ENCRYPT_NONE) {
            camel_stream_printf(stream, "%s<br>", _(smime_encrypt_table[valid->encrypt.status].shortdesc));
        }

        camel_stream_printf(stream, "</td></tr></table>");
    }
}

static void
efhd_application_xpkcs7mime(EMFormat *emf, CamelStream *stream, CamelMimePart *part, const EMFormatHandler *info)
{
    CamelCipherContext *context;
    CamelException *ex;
    extern CamelSession *session;
    CamelMimePart *opart;
    CamelCipherValidity *valid;

    ex = camel_exception_new();

    context = camel_smime_context_new(session);

    opart = camel_mime_part_new();
    valid = camel_cipher_decrypt(context, part, opart, ex);
    if (valid == NULL) {
        em_format_format_error(emf, stream, ex->desc?ex->desc:_("Could not parse S/MIME message: Unknown error"));
        em_format_part_as(emf, stream, part, NULL);
    } else {
        efhd_output_secure(emf, stream, opart, valid);
    }

    camel_object_unref(opart);
    camel_object_unref(context);
    camel_exception_free(ex);
}

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

static void
efhd_multipart_signed (EMFormat *emf, CamelStream *stream, CamelMimePart *part, const EMFormatHandler *info)
{
    CamelMultipartSigned *mps;
    CamelMimePart *cpart;
    CamelCipherContext *cipher = NULL;

    mps = (CamelMultipartSigned *)camel_medium_get_content_object((CamelMedium *)part);
    if (!CAMEL_IS_MULTIPART_SIGNED(mps)
        || (cpart = camel_multipart_get_part((CamelMultipart *)mps, CAMEL_MULTIPART_SIGNED_CONTENT)) == NULL) {
        em_format_format_source(emf, stream, part);
        return;
    }

    /* FIXME: Should be done via a plugin interface */
    /* FIXME: duplicated in em-format-html.c */
    if (g_ascii_strcasecmp("application/x-pkcs7-signature", mps->protocol) == 0
        || g_ascii_strcasecmp("application/pkcs7-signature", mps->protocol) == 0)
        cipher = camel_smime_context_new(emf->session);
    else if (g_ascii_strcasecmp("application/pgp-signature", mps->protocol) == 0)
        cipher = camel_gpg_context_new(emf->session);

    if (cipher == NULL) {
        em_format_format_error(emf, stream, _("Unsupported signature format"));
        em_format_part_as(emf, stream, part, NULL);
    } else {
        CamelException *ex = camel_exception_new();
        CamelCipherValidity *valid;

        valid = camel_cipher_verify(cipher, part, ex);
        if (valid == NULL) {
            em_format_format_error(emf, stream, ex->desc?ex->desc:_("Unknown error verifying signature"));
            em_format_part_as(emf, stream, part, NULL);
        } else {
            efhd_output_secure(emf, stream, cpart, valid);
        }

        camel_exception_free(ex);
        camel_object_unref(cipher);
    }
}

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

static EMFormatHandler type_builtin_table[] = {
    { "application/x-pkcs7-mime", (EMFormatFunc)efhd_application_xpkcs7mime },
    { "application/pkcs7-mime", (EMFormatFunc)efhd_application_xpkcs7mime },

    { "multipart/signed", (EMFormatFunc)efhd_multipart_signed },
};

static void
efhd_builtin_init(EMFormatHTMLDisplayClass *efhc)
{
    int i;

    for (i=0;i<sizeof(type_builtin_table)/sizeof(type_builtin_table[0]);i++)
        em_format_class_add_handler((EMFormatClass *)efhc, &type_builtin_table[i]);
}

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

static void
efhd_bonobo_unknown(EMFormat *emf, CamelStream *stream, CamelMimePart *part, const EMFormatHandler *info)
{
    char *classid;

    classid = g_strdup_printf("bonobo-unknown:///em-format-html-display/%s", emf->part_id->str);
    em_format_html_add_pobject((EMFormatHTML *)emf, sizeof(EMFormatHTMLPObject), classid, part, efhd_bonobo_object);
    camel_stream_printf(stream, "<object classid=\"%s\" type=\"%s\">\n", classid, info->mime_type);
    g_free(classid);
}

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

static const EMFormatHandler *efhd_find_handler(EMFormat *emf, const char *mime_type)
{
    const EMFormatHandler *handle;

    handle = ((EMFormatClass *)efhd_parent)->find_handler(emf, mime_type);
    if (handle == NULL
        && efhd_use_component(mime_type)
        && (handle = g_hash_table_lookup(efhd_bonobo_handlers, mime_type)) == NULL) {
        EMFormatHandler *h = g_malloc0(sizeof(*h));

        h->mime_type = g_strdup(mime_type);
        h->handler = efhd_bonobo_unknown;
        g_hash_table_insert(efhd_bonobo_handlers, h->mime_type, h);

        handle = h;
    }

    return handle;
}

static void efhd_format_clone(EMFormat *emf, CamelFolder *folder, const char *uid, CamelMimeMessage *msg, EMFormat *src)
{
    ((EMFormatClass *)efhd_parent)->format_clone(emf, folder, uid, msg, src);
}

static void
efhd_write_image(EMFormat *emf, CamelStream *stream, EMFormatPURI *puri)
{
    CamelDataWrapper *dw = camel_medium_get_content_object((CamelMedium *)puri->part);

    /* TODO: identical to efh_write_image */
    d(printf("writing image '%s'\n", puri->uri?puri->uri:puri->cid));
    camel_data_wrapper_decode_to_stream(dw, stream);
    camel_stream_close(stream);
}

static void efhd_format_prefix(EMFormat *emf, CamelStream *stream)
{
    const char *flag, *comp, *due;
    CamelMimePart *iconpart;
    time_t date;
    char due_date[128];
    struct tm due_tm;

    if (emf->folder == NULL || emf->uid == NULL
        || (flag = camel_folder_get_message_user_tag(emf->folder, emf->uid, "follow-up")) == NULL
        || flag[0] == 0)
        return;

    /* header displayed for message-flags in mail display */
    camel_stream_printf(stream, "<table border=1 width=\"100%%\" cellspacing=2 cellpadding=2><tr>");

    comp = camel_folder_get_message_user_tag(emf->folder, emf->uid, "completed-on");
    iconpart = em_format_html_file_part((EMFormatHTML *)emf, "image/png", EVOLUTION_ICONSDIR,
                        comp&&comp[0]?"flag-for-followup-done-16.png":"flag-for-followup-16.png");
    if (iconpart) {
        char *classid;

        classid = g_strdup_printf("icon:///em-format-html-display/%s/%s", emf->part_id->str, comp&&comp[0]?"comp":"uncomp");
        camel_stream_printf(stream, "<td align=\"left\"><img src=\"%s\"></td>", classid);
        (void)em_format_add_puri(emf, sizeof(EMFormatPURI), classid, iconpart, efhd_write_image);
        g_free(classid);
        camel_object_unref(iconpart);
    }

    camel_stream_printf(stream, "<td align=\"left\" width=\"100%%\">");

    if (comp && comp[0]) {
        date = camel_header_decode_date(comp, NULL);
        localtime_r(&date, &due_tm);
        e_utf8_strftime_fix_am_pm(due_date, sizeof (due_date), _("Completed on %B %d, %Y, %l:%M %p"), &due_tm);
        camel_stream_printf(stream, "%s, %s", flag, due_date);
    } else if ((due = camel_folder_get_message_user_tag(emf->folder, emf->uid, "due-by")) != NULL && due[0]) {
        time_t now;

        date = camel_header_decode_date(due, NULL);
        now = time(NULL);
        if (now > date)
            camel_stream_printf(stream, "<b>%s</b>&nbsp;", _("Overdue:"));
        
        localtime_r(&date, &due_tm);
        e_utf8_strftime_fix_am_pm(due_date, sizeof (due_date), _("by %B %d, %Y, %l:%M %p"), &due_tm);
        camel_stream_printf(stream, "%s %s", flag, due_date);
    } else {
        camel_stream_printf(stream, "%s", flag);
    }

    camel_stream_printf(stream, "</td></tr></table>");
}

/* TODO: if these aren't going to do anything should remove */
static void efhd_format_error(EMFormat *emf, CamelStream *stream, const char *txt)
{
    ((EMFormatClass *)efhd_parent)->format_error(emf, stream, txt);
}

static void efhd_format_message(EMFormat *emf, CamelStream *stream, CamelMedium *part)
{
    ((EMFormatClass *)efhd_parent)->format_message(emf, stream, part);
}

static void efhd_format_source(EMFormat *emf, CamelStream *stream, CamelMimePart *part)
{
    ((EMFormatClass *)efhd_parent)->format_source(emf, stream, part);
}

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

/* if it hasn't been processed yet, format the attachment */
static void
efhd_attachment_show(GtkWidget *w, struct _attach_puri *info)
{
    d(printf("show attachment button called\n"));

    info->shown = ~info->shown;
    em_format_set_inline(info->puri.format, info->puri.part, info->shown);
    /* FIXME: do this in an idle handler */
    em_format_redraw(info->puri.format);
#if 0
    /* FIXME: track shown state in parent */

    if (info->shown) {
        d(printf("hiding\n"));
        info->shown = FALSE;
        if (info->frame)
            gtk_widget_hide((GtkWidget *)info->frame);
        gtk_widget_show(info->forward);
        gtk_widget_hide(info->down);
    } else {
        d(printf("showing\n"));
        info->shown = TRUE;
        if (info->frame)
            gtk_widget_show((GtkWidget *)info->frame);
        gtk_widget_hide(info->forward);
        gtk_widget_show(info->down);

        /* have we decoded it yet? */
        if (info->output) {
            info->handle->handler(info->puri.format, info->output, info->puri.part, info->handle);
            camel_stream_close(info->output);
            camel_object_unref(info->output);
            info->output = NULL;
        }
    }

    em_format_set_inline(info->puri.format, info->puri.part, info->shown);
#endif
}

static EMPopupItem efhd_menu_items[] = {
    { EM_POPUP_BAR, "05.display", },
    { EM_POPUP_ITEM, "05.display.00", N_("_View Inline"), G_CALLBACK(efhd_attachment_show) },
    { EM_POPUP_ITEM, "05.display.00", N_("_Hide"), G_CALLBACK(efhd_attachment_show) },
};

static void
efhd_popup_place_widget(GtkMenu *menu, int *x, int *y, gboolean *push_in, gpointer user_data)
{
    GtkWidget *w = user_data;
    
    gdk_window_get_origin(gtk_widget_get_parent_window(w), x, y);
    *x += w->allocation.x + w->allocation.width;
    *y += w->allocation.y;
}

static gboolean
efhd_attachment_popup(GtkWidget *w, GdkEventButton *event, struct _attach_puri *info)
{
    GtkMenu *menu;
    GSList *menus = NULL;
    EMPopup *emp;
    EMPopupTarget *target;
    EMPopupItem *item;

    d(printf("attachment popup, button %d\n", event->button));

    if (event && event->button != 1 && event->button != 3) {
        /* ?? gtk_propagate_event(GTK_WIDGET (user_data), (GdkEvent *)event);*/
        return FALSE;
    }

    emp = em_popup_new("com.ximian.mail.formathtmldisplay.popup.part");
    target = em_popup_target_new_part(info->puri.part, info->handle?info->handle->mime_type:NULL);
    target->widget = w;

    /* add our local menus */
    efhd_menu_items[0].activate_data = info;
    menus = g_slist_prepend(menus, &efhd_menu_items[0]);
    item = &efhd_menu_items[info->shown?2:1];
    item->activate_data = info;
    menus = g_slist_prepend(menus, item);
    em_popup_add_items(emp, menus, (GDestroyNotify)g_slist_free);

    menu = em_popup_create_menu_once(emp, target, target->mask, target->mask);
    if (event)
        gtk_menu_popup(menu, NULL, NULL, NULL, NULL, event->button, event->time);
    else
        gtk_menu_popup(menu, NULL, NULL, (GtkMenuPositionFunc)efhd_popup_place_widget, w, 0, gtk_get_current_event_time());

    return TRUE;
}

static gboolean
efhd_attachment_popup_menu(GtkWidget *w, struct _attach_puri *info)
{
    return efhd_attachment_popup(w, NULL, info);
}

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

static void
efhd_drag_data_get(GtkWidget *w, GdkDragContext *drag, GtkSelectionData *data, guint info, guint time, EMFormatHTMLPObject *pobject)
{
    CamelMimePart *part = pobject->part;
    char *uri, *path;
    CamelStream *stream;

    switch (info) {
    case 0: /* mime/type request */
        stream = camel_stream_mem_new();
        /* TODO: shoudl format_format_text run on the content-object? */
        /* TODO: should we just do format_content? */
        if (camel_content_type_is (((CamelDataWrapper *)part)->mime_type, "text", "*")) {
            /* FIXME: this should be an em_utils method, it only needs a default charset param */
            em_format_format_text((EMFormat *)pobject->format, stream, (CamelDataWrapper *)part);
        } else {
            CamelDataWrapper *dw = camel_medium_get_content_object((CamelMedium *)part);

            camel_data_wrapper_decode_to_stream(dw, stream);
        }

        gtk_selection_data_set(data, data->target, 8,
                       ((CamelStreamMem *)stream)->buffer->data,
                       ((CamelStreamMem *)stream)->buffer->len);
        camel_object_unref(stream);
        break;
    case 1: /* text-uri-list request */
        /* Kludge around Nautilus requesting the same data many times */
        uri = g_object_get_data((GObject *)w, "e-drag-uri");
        if (uri) {
            gtk_selection_data_set(data, data->target, 8, uri, strlen(uri));
            return;
        }

        path = em_utils_temp_save_part(w, part);
        if (path == NULL)
            return;

        uri = g_strdup_printf("file://%s\r\n", path);
        g_free(path);
        gtk_selection_data_set(data, data->target, 8, uri, strlen(uri));
        g_object_set_data_full((GObject *)w, "e-drag-uri", uri, g_free);
        break;
    default:
        abort();
    }
}

static void
efhd_drag_data_delete(GtkWidget *w, GdkDragContext *drag, EMFormatHTMLPObject *pobject)
{
    char *uri;
    
    uri = g_object_get_data((GObject *)w, "e-drag-uri");
    if (uri) {
        /* NB: this doesn't kill the dnd directory */
        /* NB: is this ever called? */
        unlink(uri+7);
        g_object_set_data((GObject *)w, "e-drag-uri", NULL);
    }
}

static void
efhd_write_icon_job(struct _EMFormatHTMLJob *job, int cancelled)
{
    EMFormatHTMLPObject *pobject;
    CamelDataWrapper *dw;

    if (cancelled)
        return;

    pobject = job->u.data;
    dw = camel_medium_get_content_object((CamelMedium *)pobject->part);
    camel_data_wrapper_decode_to_stream(dw, job->stream);
    camel_stream_close(job->stream);
}

/* attachment button callback */
static gboolean
efhd_attachment_button(EMFormatHTML *efh, GtkHTMLEmbedded *eb, EMFormatHTMLPObject *pobject)
{
    struct _attach_puri *info;
    GtkWidget *hbox, *w, *button, *mainbox;
    char *simple_type;
    GtkTargetEntry drag_types[] = {
        { NULL, 0, 0 },
        { "text/uri-list", 0, 1 },
    };

    /* FIXME: handle default shown case */
    d(printf("adding attachment button/content\n"));

    info = (struct _attach_puri *)em_format_find_puri((EMFormat *)efh, pobject->classid);
    g_assert(info != NULL);
    g_assert(info->forward == NULL);

    mainbox = gtk_hbox_new(FALSE, 0);

    button = gtk_button_new();

    if (info->handle)
        g_signal_connect(button, "clicked", G_CALLBACK(efhd_attachment_show), info);
    else
        GTK_WIDGET_UNSET_FLAGS(button, GTK_CAN_FOCUS);

    hbox = gtk_hbox_new(FALSE, 2);
    info->forward = gtk_image_new_from_stock(GTK_STOCK_GO_FORWARD, GTK_ICON_SIZE_BUTTON);
    gtk_box_pack_start((GtkBox *)hbox, info->forward, TRUE, TRUE, 0);
    if (info->handle) {
        info->down = gtk_image_new_from_stock(GTK_STOCK_GO_DOWN, GTK_ICON_SIZE_BUTTON);
        gtk_box_pack_start((GtkBox *)hbox, info->down, TRUE, TRUE, 0);
    }

    w = gtk_image_new();
    gtk_widget_set_size_request(w, 24, 24);
    gtk_box_pack_start((GtkBox *)hbox, w, TRUE, TRUE, 0);
    gtk_container_add((GtkContainer *)button, hbox);
    gtk_box_pack_start((GtkBox *)mainbox, button, TRUE, TRUE, 0);

    /* FIXME: loses any snoop info */
    simple_type = camel_content_type_simple (((CamelDataWrapper *)pobject->part)->mime_type);
    camel_strdown(simple_type);

    /* FIXME: offline parts, just get icon */
    if (camel_content_type_is (((CamelDataWrapper *)pobject->part)->mime_type, "image", "*")) {
        EMFormatHTMLJob *job;
        GdkPixbuf *mini;
        char *key;

        key = pobject->classid;
        mini = em_icon_stream_get_image(key);
        if (mini) {
            d(printf("got image from cache '%s'\n", key));
            gtk_image_set_from_pixbuf((GtkImage *)w, mini);
            g_object_unref(mini);
        } else {
            d(printf("need to create icon image '%s'\n", key));
            job = em_format_html_job_new(efh, efhd_write_icon_job, pobject);
            job->stream = (CamelStream *)em_icon_stream_new((GtkImage *)w, key);
            em_format_html_job_queue(efh, job);
        }
    } else {
        GdkPixbuf *pixbuf = e_icon_for_mime_type(simple_type, 24);
        GdkPixbuf *mini = gdk_pixbuf_scale_simple(pixbuf, 24, 24, GDK_INTERP_BILINEAR);

        gtk_image_set_from_pixbuf((GtkImage *)w, mini);
        g_object_unref(mini);
        g_object_unref(pixbuf);
    }

    drag_types[0].target = simple_type;
    gtk_drag_source_set(button, GDK_BUTTON1_MASK, drag_types, sizeof(drag_types)/sizeof(drag_types[0]), GDK_ACTION_COPY);
    g_signal_connect(button, "drag-data-get", G_CALLBACK(efhd_drag_data_get), pobject);
    g_signal_connect (button, "drag-data-delete", G_CALLBACK(efhd_drag_data_delete), pobject);
    g_free(simple_type);

    button = gtk_button_new();
    /*GTK_WIDGET_UNSET_FLAGS(button, GTK_CAN_FOCUS);*/
    gtk_container_add((GtkContainer *)button, gtk_arrow_new(GTK_ARROW_DOWN, GTK_SHADOW_ETCHED_IN));
    g_signal_connect(button, "button_press_event", G_CALLBACK(efhd_attachment_popup), info);
    g_signal_connect(button, "popup_menu", G_CALLBACK(efhd_attachment_popup_menu), info);
    g_signal_connect(button, "clicked", G_CALLBACK(efhd_attachment_popup_menu), info);
    gtk_box_pack_start((GtkBox *)mainbox, button, TRUE, TRUE, 0);

    gtk_widget_show_all(mainbox);

    if (info->shown)
        gtk_widget_hide(info->forward);
    else if (info->down)
        gtk_widget_hide(info->down);

    gtk_container_add((GtkContainer *)eb, mainbox);

    return TRUE;
}

/* not used currently */
/* frame source callback */
static void
efhd_attachment_frame(EMFormat *emf, CamelStream *stream, EMFormatPURI *puri)
{
    struct _attach_puri *info = (struct _attach_puri *)puri;

    if (info->shown) {
        d(printf("writing to frame content, handler is '%s'\n", info->handle->mime_type));
        info->handle->handler(emf, stream, info->puri.part, info->handle);
        camel_stream_close(stream);
    } else {
        /* FIXME: this is leaked if the object is closed without showing it
           NB: need a virtual puri_free method? */
        info->output = stream;
        camel_object_ref(stream);
    }
}

static gboolean
efhd_bonobo_object(EMFormatHTML *efh, GtkHTMLEmbedded *eb, EMFormatHTMLPObject *pobject)
{
    CamelDataWrapper *wrapper;
    Bonobo_ServerInfo *component;
    GtkWidget *embedded;
    Bonobo_PersistStream persist;   
    CORBA_Environment ev;
    CamelStreamMem *cstream;
    BonoboStream *bstream;
    BonoboControlFrame *control_frame;
    Bonobo_PropertyBag prop_bag;

    component = gnome_vfs_mime_get_default_component(eb->type);
    if (component == NULL)
        return FALSE;

    embedded = bonobo_widget_new_control(component->iid, NULL);
    CORBA_free(component);
    if (embedded == NULL)
        return FALSE;
    
    CORBA_exception_init(&ev);

    control_frame = bonobo_widget_get_control_frame((BonoboWidget *)embedded);
    prop_bag = bonobo_control_frame_get_control_property_bag(control_frame, NULL);
    if (prop_bag != CORBA_OBJECT_NIL) {
        /*
         * Now we can take care of business. Currently, the only control
         * that needs something passed to it through a property bag is
         * the iTip control, and it needs only the From email address,
         * but perhaps in the future we can generalize this section of code
         * to pass a bunch of useful things to all embedded controls.
         */
        const CamelInternetAddress *from;
        char *from_address;
                
        from = camel_mime_message_get_from((CamelMimeMessage *)((EMFormat *)efh)->message);
        from_address = camel_address_encode((CamelAddress *)from);
        bonobo_property_bag_client_set_value_string(prop_bag, "from_address", from_address, &ev);
        g_free(from_address);
        
        Bonobo_Unknown_unref(prop_bag, &ev);
    }
    
    persist = (Bonobo_PersistStream)Bonobo_Unknown_queryInterface(bonobo_widget_get_objref((BonoboWidget *)embedded),
                                      "IDL:Bonobo/PersistStream:1.0", NULL);
    if (persist == CORBA_OBJECT_NIL) {
        gtk_object_sink((GtkObject *)embedded);
        CORBA_exception_free(&ev);              
        return FALSE;
    }
    
    /* Write the data to a CamelStreamMem... */
    cstream = (CamelStreamMem *)camel_stream_mem_new();
    wrapper = camel_medium_get_content_object((CamelMedium *)pobject->part);
    camel_data_wrapper_decode_to_stream(wrapper, (CamelStream *)cstream);
    
    /* ...convert the CamelStreamMem to a BonoboStreamMem... */
    bstream = bonobo_stream_mem_create(cstream->buffer->data, cstream->buffer->len, TRUE, FALSE);
    camel_object_unref(cstream);
    
    /* ...and hydrate the PersistStream from the BonoboStream. */
    Bonobo_PersistStream_load(persist,
                  bonobo_object_corba_objref(BONOBO_OBJECT (bstream)),
                  eb->type, &ev);
    bonobo_object_unref(BONOBO_OBJECT (bstream));
    Bonobo_Unknown_unref(persist, &ev);
    CORBA_Object_release(persist, &ev);
    
    if (ev._major != CORBA_NO_EXCEPTION) {
        gtk_object_sink((GtkObject *)embedded);
        CORBA_exception_free(&ev);              
        return FALSE;
    }
    CORBA_exception_free(&ev);
    
    gtk_widget_show(embedded);
    gtk_container_add(GTK_CONTAINER (eb), embedded);
    
    return TRUE;
}

static gboolean
efhd_check_server_prop(Bonobo_ServerInfo *component, const char *propname, const char *value)
{
    CORBA_sequence_CORBA_string stringv;
    Bonobo_ActivationProperty *prop;
    int i;

    prop = bonobo_server_info_prop_find(component, propname);
    if (!prop || prop->v._d != Bonobo_ACTIVATION_P_STRINGV)
        return FALSE;

    stringv = prop->v._u.value_stringv;
    for (i = 0; i < stringv._length; i++) {
        if (!g_ascii_strcasecmp(value, stringv._buffer[i]))
            return TRUE;
    }

    return FALSE;
}

static gboolean
efhd_use_component(const char *mime_type)
{
    GList *components, *iter;
    Bonobo_ServerInfo *component = NULL;

    /* should this cache it? */

    if (g_ascii_strcasecmp(mime_type, "text/x-vcard") != 0
        && g_ascii_strcasecmp(mime_type, "text/calendar") != 0) {
        const char **mime_types;
        int i;

        mime_types = mail_config_get_allowable_mime_types();
        for (i = 0; mime_types[i]; i++) {
            if (!g_ascii_strcasecmp(mime_types[i], mime_type))
                goto type_ok;
        }
        return FALSE;
    }
type_ok:
    components = gnome_vfs_mime_get_all_components (mime_type);
    for (iter = components; iter; iter = iter->next) {
        Bonobo_ServerInfo *comp = iter->data;

        comp = iter->data;
        if (efhd_check_server_prop(comp, "repo_ids", "IDL:Bonobo/PersistStream:1.0")
            && efhd_check_server_prop(comp, "bonobo:supported_mime_types", mime_type)) {
            component = comp;
            break;
        }
    }
    gnome_vfs_mime_component_list_free (components);

    return component != NULL;
}

static void
efhd_format_attachment(EMFormat *emf, CamelStream *stream, CamelMimePart *part, const char *mime_type, const EMFormatHandler *handle)
{
    char *classid, *text, *html;
    struct _attach_puri *info;

    classid = g_strdup_printf("attachment%s", emf->part_id->str);
    info = (struct _attach_puri *)em_format_add_puri(emf, sizeof(*info), classid, part, efhd_attachment_frame);
    em_format_html_add_pobject((EMFormatHTML *)emf, sizeof(EMFormatHTMLPObject), classid, part, efhd_attachment_button);
    info->handle = handle;
    info->shown = em_format_is_inline(emf, info->puri.part) && handle != NULL;

    camel_stream_write_string(stream,
                  "<table height=6><tr><td><a></a></td></tr></table>\n"
                  "<table cellspacing=0 cellpadding=0><tr><td>"
                  "<table width=10 cellspacing=0 cellpadding=0>"
                  "<tr><td></td></tr></table></td>");

    camel_stream_printf(stream, "<td><object classid=\"%s\"></object></td>", classid);

    camel_stream_write_string(stream,
                  "<td><table width=3 cellspacing=0 cellpadding=0>"
                  "<tr><td></td></tr></table></td><td><font size=-1>");

    /* output some info about it */
    /* FIXME: should we look up mime_type from object again? */
    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);
    g_free(html);
    g_free(text);

    camel_stream_write_string(stream,
                  "</font></td></tr><tr></table>\n"
                  "<table height=6><tr><td><a></a></td></tr></table>\n");

    if (handle) {
        if (info->shown)
            handle->handler(emf, stream, part, handle);
        /*camel_stream_printf(stream, "<iframe src=\"%s\" marginheight=0 marginwidth=0>%s</iframe>\n", classid, _("Attachment content could not be loaded"));*/
    } else if (efhd_use_component(mime_type)) {
        g_free(classid); /* messy */

        classid = g_strdup_printf("bonobo-unknown:///em-format-html-display/%s", emf->part_id->str);
        em_format_html_add_pobject((EMFormatHTML *)emf, sizeof(EMFormatHTMLPObject), classid, part, efhd_bonobo_object);
        camel_stream_printf(stream, "<object classid=\"%s\" type=\"%s\">\n", classid, mime_type);
    }

    g_free(classid);
}