path: root/mail/mail-display.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * mail-display.c: Mail display widget
 *
 * Author:
 *   Miguel de Icaza
 *   Bertrand Guiheneuf (bg@aful.org)
 *
 * (C) 2000 Ximian, Inc.
 */

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

#include <sys/stat.h>
#include <ctype.h>
#include <fcntl.h>
#include <errno.h>
#include <libgnorba/gnorba.h>
#include <libgnomevfs/gnome-vfs-mime-info.h>
#include <libgnomevfs/gnome-vfs-mime-handlers.h>
#include <libgnomevfs/gnome-vfs.h>
#include <bonobo/bonobo-control-frame.h>
#include <bonobo/bonobo-stream-memory.h>
#include <bonobo/bonobo-ui-toolbar-icon.h>
#include <bonobo/bonobo-widget.h>
#include <bonobo/bonobo-socket.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gdk-pixbuf/gdk-pixbuf-loader.h>
#include <gal/util/e-util.h>
#include <gal/widgets/e-popup-menu.h>
#include <gal/widgets/e-unicode.h>
#include <gtk/gtkinvisible.h>
#include <gtkhtml/gtkhtml-embedded.h>
#include <gtkhtml/htmlengine.h> /* XXX */
#include <gtkhtml/htmlobject.h> /* XXX */
#include <gtkhtml/htmltext.h> /* XXX */
#include <gtkhtml/htmlinterval.h> /* XXX */
#include <gtkhtml/gtkhtml-stream.h>

#include "e-util/e-html-utils.h"
#include "e-util/e-mktemp.h"
#include "addressbook/backend/ebook/e-book-util.h"

#include "e-searching-tokenizer.h"
#include "folder-browser-factory.h"
#include "mail-stream-gtkhtml.h"
#include "mail-display.h"
#include "mail-config.h"
#include "mail-ops.h"
#include "mail-mt.h"
#include "mail.h"

#include "art/empty.xpm"

#define PARENT_TYPE (gtk_vbox_get_type ())

static GtkObjectClass *mail_display_parent_class;

struct _PixbufLoader {
    CamelDataWrapper *wrapper; /* The data */
    CamelStream *mstream;
    GdkPixbufLoader *loader; 
    GtkHTMLEmbedded *eb;
    char *type; /* Type of data, in case the conversion fails */
    char *cid; /* Strdupped on creation, but not freed until 
              the hashtable is destroyed */
    GtkWidget *pixmap;
    guint32 destroy_id;
};
static GHashTable *thumbnail_cache = NULL;

static gchar *save_pathname = NULL;  /* preserves last directory in save dialog */

/*----------------------------------------------------------------------*
 *                        Callbacks
 *----------------------------------------------------------------------*/

static void
write_data_written(CamelMimePart *part, char *name, int done, void *data)
{
    int *ret = data;

    /* should we popup a dialogue to say its done too? */
    *ret = done;
}

static gboolean
write_data_to_file (CamelMimePart *part, const char *name, gboolean unique)
{
    int fd;
    int ret = FALSE;
    
    g_return_val_if_fail (CAMEL_IS_MIME_PART (part), FALSE);
    
    fd = open (name, O_WRONLY | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
    if (fd == -1 && errno == EEXIST && !unique) {
        GtkWidget *dlg;
        GtkWidget *text;
        
        dlg = gnome_dialog_new (_("Overwrite file?"),
                    GNOME_STOCK_BUTTON_YES, 
                    GNOME_STOCK_BUTTON_NO,
                    NULL);
        text = gtk_label_new (_("A file by that name already exists.\nOverwrite it?"));
        gtk_box_pack_start (GTK_BOX (GNOME_DIALOG (dlg)->vbox), text, TRUE, TRUE, 4);
        gtk_window_set_policy(GTK_WINDOW(dlg), FALSE, TRUE, FALSE);
        gtk_widget_show (text);
        
        if (gnome_dialog_run_and_close (GNOME_DIALOG (dlg)) != 0)
            return FALSE;
    }
    
    if (fd != -1)
        close (fd);
    
    /* should this have progress of what its doing? */
    mail_msg_wait (mail_save_part (part, name, write_data_written, &ret));

    return ret;
}

static char *
make_safe_filename (const char *prefix,CamelMimePart *part)
{
    const char *name = NULL;
    char *safe, *p;

    if (part) {
        name = camel_mime_part_get_filename (part);
    }
        
    if (!name) {
        /* This is a filename. Translators take note. */
        name = _("attachment");
    }

    p = strrchr (name, '/');
    if (p)
        safe = g_strdup_printf ("%s%s", prefix, p);
    else
        safe = g_strdup_printf ("%s/%s", prefix, name);
    
    p = strrchr (safe, '/') + 1;
    if (p)
        e_filename_make_safe (p);
    
    return safe;
}

static void
save_data_cb (GtkWidget *widget, gpointer user_data)
{
    GtkFileSelection *file_select = (GtkFileSelection *)
        gtk_widget_get_ancestor (widget, GTK_TYPE_FILE_SELECTION);
    gchar *p;

    /* uh, this doesn't really feel right, but i dont know what to do better */
    gtk_widget_hide (GTK_WIDGET (file_select));
    write_data_to_file (user_data,
                gtk_file_selection_get_filename (file_select),
                FALSE);

    /* preserve the pathname */
    g_free(save_pathname);
    save_pathname = g_strdup(gtk_file_selection_get_filename(file_select));
    if((p = strrchr(save_pathname, '/')) != NULL)
        p[0] = 0;
    else {
        g_free(save_pathname);
        save_pathname = NULL;
    }

    gtk_widget_destroy (GTK_WIDGET (file_select));
}

static void
save_destroy_cb (GtkWidget *widget, CamelMimePart *part) 
{
    camel_object_unref (CAMEL_OBJECT (part));
}

static gboolean
idle_redisplay (gpointer data)
{
    MailDisplay *md = data;

    md->idle_id = 0;
    mail_display_redisplay (md, FALSE);
    return FALSE;
}

void
mail_display_queue_redisplay (MailDisplay *md)
{
    if (!md->idle_id) {
        md->idle_id = g_idle_add_full (G_PRIORITY_LOW, idle_redisplay,
                           md, NULL);
    }
}

static void
mail_display_jump_to_anchor (MailDisplay *md, const char *url)
{
    char *anchor = strstr (url, "#");
    
    g_return_if_fail (anchor != NULL);

    if (anchor)
        gtk_html_jump_to_anchor (md->html, anchor + 1);
}

static void
on_link_clicked (GtkHTML *html, const char *url, MailDisplay *md)
{
    if (!g_strncasecmp (url, "news:", 5) ||
        !g_strncasecmp (url, "nntp:", 5))
        g_warning ("Can't handle news URLs yet.");
    else if (!g_strncasecmp (url, "mailto:", 7))
        send_to_url (url);
    else if (*url == '#')
        mail_display_jump_to_anchor (md, url);
    else
        gnome_url_show (url);
}

static void 
save_part (CamelMimePart *part)
{
    GtkFileSelection *file_select;
    char *filename;
    
    g_return_if_fail (part != NULL);
    camel_object_ref (CAMEL_OBJECT (part));
    
    if (save_pathname == NULL)
        save_pathname = g_strdup (g_get_home_dir ());
    
    filename = make_safe_filename (save_pathname, part);
    
    file_select = GTK_FILE_SELECTION (
        gtk_file_selection_new (_("Save Attachment")));
    gtk_file_selection_set_filename (file_select, filename);
    /* set the GtkEntry with the locale filename by breaking abstraction */
    e_utf8_gtk_entry_set_text (GTK_ENTRY (file_select->selection_entry), g_basename (filename));
    g_free (filename);
    
    gtk_signal_connect (GTK_OBJECT (file_select->ok_button), "clicked", 
                GTK_SIGNAL_FUNC (save_data_cb), part);
    gtk_signal_connect_object (GTK_OBJECT (file_select->cancel_button),
                   "clicked",
                   GTK_SIGNAL_FUNC (gtk_widget_destroy),
                   GTK_OBJECT (file_select));
    
    gtk_signal_connect (GTK_OBJECT (file_select), "destroy",
                GTK_SIGNAL_FUNC (save_destroy_cb), part);

    gtk_widget_show (GTK_WIDGET (file_select));
}

static void
save_cb (GtkWidget *widget, gpointer user_data)
{
    CamelMimePart *part = gtk_object_get_data (GTK_OBJECT (user_data), "CamelMimePart");

    save_part (part);
}

static void
launch_cb (GtkWidget *widget, gpointer user_data)
{
    CamelMimePart *part = gtk_object_get_data (user_data, "CamelMimePart");
    MailMimeHandler *handler;
    GList *apps, *children, *c;
    GnomeVFSMimeApplication *app;
    char *command, *filename;
    const char *tmpdir;
    
    handler = mail_lookup_handler (gtk_object_get_data (user_data, "mime_type"));
    g_return_if_fail (handler != NULL && handler->applications != NULL);
    
    /* Yum. Too bad EPopupMenu doesn't allow per-item closures. */
    children = gtk_container_children (GTK_CONTAINER (widget->parent));
    g_return_if_fail (children != NULL && children->next != NULL && children->next->next != NULL);
    
    for (c = children->next->next, apps = handler->applications; c && apps; c = c->next, apps = apps->next) {
        if (c->data == widget)
            break;
    }
    g_list_free (children);
    g_return_if_fail (c != NULL && apps != NULL);
    app = apps->data;
    
    tmpdir = e_mkdtemp ("evolution.XXXXXX");
    
    if (!tmpdir) {
        char *msg = g_strdup_printf (_("Could not create temporary "
                           "directory: %s"),
                         g_strerror (errno));
        gnome_error_dialog (msg);
        g_free (msg);
        return;
    }
    
    filename = make_safe_filename (tmpdir, part);
    
    if (!write_data_to_file (part, filename, TRUE)) {
        g_free (filename);
        return;
    }
    
    command = g_strdup_printf ("%s %s%s &", app->command,
                   app->expects_uris == GNOME_VFS_MIME_APPLICATION_ARGUMENT_TYPE_URIS ? "file:" : "",
                   filename);
    system (command);
    g_free (command);
    g_free (filename);
}

static void
inline_cb (GtkWidget *widget, gpointer user_data)
{
    MailDisplay *md = gtk_object_get_data (user_data, "MailDisplay");
    CamelMimePart *part = gtk_object_get_data (user_data, "CamelMimePart");

    mail_part_toggle_displayed (part, md);
    mail_display_queue_redisplay (md);
}

static void
button_press (GtkWidget *widget, CamelMimePart *part)
{
    MailDisplay *md;

    md = gtk_object_get_data (GTK_OBJECT (widget), "MailDisplay");
    if (md == NULL) {
        g_warning ("No MailDisplay on button!");
        return;
    }

    mail_part_toggle_displayed (part, md);
    mail_display_queue_redisplay (md);
}

static gboolean
pixmap_press (GtkWidget *widget, GdkEventButton *event, EScrollFrame *user_data)
{
    EPopupMenu *menu;
    EPopupMenu save_item = { N_("Save to Disk..."), NULL,
                 GTK_SIGNAL_FUNC (save_cb), NULL, 0 };
    EPopupMenu view_item = { N_("View Inline"), NULL,
                 GTK_SIGNAL_FUNC (inline_cb), NULL, 2 };
    EPopupMenu open_item = { N_("Open in %s..."), NULL,
                 GTK_SIGNAL_FUNC (launch_cb), NULL, 1 };
    MailDisplay *md;
    CamelMimePart *part;
    MailMimeHandler *handler;
    int mask = 0, i, nitems;

#ifdef USE_OLD_DISPLAY_STYLE
    if (event->button != 3) {
        gtk_propagate_event (GTK_WIDGET (user_data),
                     (GdkEvent *)event);
        return TRUE;
    }
#endif

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

    /* Stop the signal, since we don't want the button's class method to
       mess up our popup. */
    gtk_signal_emit_stop_by_name (GTK_OBJECT (widget), "button_press_event");

    part = gtk_object_get_data (GTK_OBJECT (widget), "CamelMimePart");
    handler = mail_lookup_handler (gtk_object_get_data (GTK_OBJECT (widget),
                                "mime_type"));

    if (handler && handler->applications)
        nitems = g_list_length (handler->applications) + 2;
    else
        nitems = 3;
    menu = g_new0 (EPopupMenu, nitems + 1);

    /* Save item */
    memcpy (&menu[0], &save_item, sizeof (menu[0]));
    menu[0].name = _(menu[0].name);

    /* Inline view item */
    memcpy (&menu[1], &view_item, sizeof (menu[1]));
    if (handler && handler->builtin) {
        md = gtk_object_get_data (GTK_OBJECT (widget), "MailDisplay");

        if (!mail_part_is_displayed_inline (part, md)) {
            if (handler->component) {
                OAF_Property *prop;
                char *name;

                prop = oaf_server_info_prop_find (
                    handler->component, "name");
                if (!prop) {
                    prop = oaf_server_info_prop_find (
                        handler->component,
                        "description");
                }
                if (prop && prop->v._d == OAF_P_STRING)
                    name = prop->v._u.value_string;
                else
                    name = "bonobo";
                menu[1].name = g_strdup_printf (
                    _("View Inline (via %s)"), name);
            } else
                menu[1].name = g_strdup (_(menu[1].name));
        } else
            menu[1].name = g_strdup (_("Hide"));
    } else {
        menu[1].name = g_strdup (_(menu[1].name));
        mask |= 2;
    }

    /* External views */
    if (handler && handler->applications) {
        GnomeVFSMimeApplication *app;
        GList *apps;
        int i;

        apps = handler->applications;
        for (i = 2; i < nitems; i++, apps = apps->next) {
            app = apps->data;
            memcpy (&menu[i], &open_item, sizeof (menu[i]));
            menu[i].name = g_strdup_printf (_(menu[i].name), app->name);
        }
    } else {
        memcpy (&menu[2], &open_item, sizeof (menu[2]));
        menu[2].name = g_strdup_printf (_(menu[2].name),
                        _("External Viewer"));
        mask |= 1;
    }

    e_popup_menu_run (menu, (GdkEvent *)event, mask, 0, widget);

    for (i = 1; i < nitems; i++)
        g_free (menu[i].name);
    g_free (menu);
    return TRUE;
}   

static GdkPixbuf *
pixbuf_for_mime_type (const char *mime_type)
{
    const char *icon_name;
    char *filename = NULL;
    GdkPixbuf *pixbuf = NULL;

    icon_name = gnome_vfs_mime_get_value (mime_type, "icon-filename");
    if (icon_name) {
        if (*icon_name == '/') {
            pixbuf = gdk_pixbuf_new_from_file (icon_name);
            if (pixbuf)
                return pixbuf;
        }

        filename = gnome_pixmap_file (icon_name);
        if (!filename) {
            char *fm_icon;

            fm_icon = g_strdup_printf ("nautilus/%s", icon_name);
            filename = gnome_pixmap_file (fm_icon);
            if (!filename) {
                fm_icon = g_strdup_printf ("mc/%s", icon_name);
                filename = gnome_pixmap_file (fm_icon);
            }
            g_free (fm_icon);
        }
    }
    
    if (filename) {
        pixbuf = gdk_pixbuf_new_from_file (filename);
        g_free (filename);
    }

    if (!pixbuf) {
        filename = gnome_pixmap_file ("gnome-unknown.png");
        if (filename) {
            pixbuf = gdk_pixbuf_new_from_file (filename);
            g_free (filename);
        } else {
            g_warning ("Could not get any icon for %s!",mime_type);
            pixbuf = gdk_pixbuf_new_from_xpm_data (
                (const char **)empty_xpm);
        }
    }

    return pixbuf;
}

static gboolean
pixbuf_uncache (gpointer key)
{
    GdkPixbuf *pixbuf;

    pixbuf = g_hash_table_lookup (thumbnail_cache, key);
    gdk_pixbuf_unref (pixbuf);
    g_hash_table_remove (thumbnail_cache, key);
    g_free (key);
    return FALSE;
}

static gint
pixbuf_gen_idle (struct _PixbufLoader *pbl)
{
    GdkPixbuf *pixbuf, *mini;
    gboolean error = FALSE;
    char tmp[4096];
    int len, width, height, ratio;
    gpointer orig_key;

    /* Get the pixbuf from the cache */
    if (g_hash_table_lookup_extended (thumbnail_cache, pbl->cid,
                      &orig_key, (gpointer *)&mini)) {
        width = gdk_pixbuf_get_width (mini);
        height = gdk_pixbuf_get_height (mini);

        bonobo_ui_toolbar_icon_set_pixbuf (
                BONOBO_UI_TOOLBAR_ICON (pbl->pixmap), mini);
        gtk_widget_set_usize (pbl->pixmap, width, height);
        
        /* Restart the cache-cleaning timer */
        g_source_remove_by_user_data (orig_key);
        g_timeout_add (5 * 60 * 1000, pixbuf_uncache, orig_key);

        if (pbl->loader) {
            gdk_pixbuf_loader_close (pbl->loader);
            gtk_object_destroy (GTK_OBJECT (pbl->loader));
            camel_object_unref (CAMEL_OBJECT (pbl->mstream));
        }
        gtk_signal_disconnect (GTK_OBJECT (pbl->eb), pbl->destroy_id);
        g_free (pbl->type);
        g_free (pbl->cid);
        g_free (pbl);

        return FALSE;
    }

    /* Not in cache, so get a pixbuf from the wrapper */

    if (!GTK_IS_WIDGET (pbl->pixmap)) {
        /* Widget has died */
        if (pbl->mstream)
            camel_object_unref (CAMEL_OBJECT (pbl->mstream));

        if (pbl->loader) {
            gdk_pixbuf_loader_close (pbl->loader);
            gtk_object_destroy (GTK_OBJECT (pbl->loader));
        }
    
        g_free (pbl->type);
        g_free (pbl->cid);
        g_free (pbl);
        return FALSE;
    }

    if (pbl->mstream) {
        if (pbl->loader == NULL)
            pbl->loader = gdk_pixbuf_loader_new ();

        len = camel_stream_read (pbl->mstream, tmp, 4096);
        if (len > 0) {
            error = !gdk_pixbuf_loader_write (pbl->loader, tmp, len);
            if (!error)
                return TRUE;
        } else if (!camel_stream_eos (pbl->mstream))
            error = TRUE;
    }

    if (error || !pbl->mstream) {
        if (pbl->type)
            pixbuf = pixbuf_for_mime_type (pbl->type);
        else
            pixbuf = gdk_pixbuf_new_from_file (EVOLUTION_ICONSDIR "/pgp-signature-nokey.png");
    } else
        pixbuf = gdk_pixbuf_loader_get_pixbuf (pbl->loader);

    width = gdk_pixbuf_get_width (pixbuf);
    height = gdk_pixbuf_get_height (pixbuf);
    
    if (width >= height) {
        if (width > 24) {
            ratio = width / 24;
            width = 24;
            height /= ratio;
        }
    } else {
        if (height > 24) {
            ratio = height / 24;
            height = 24;
            width /= ratio;
        }
    }

    mini = gdk_pixbuf_scale_simple (pixbuf, width, height,
                    GDK_INTERP_BILINEAR);
    if (error || !pbl->mstream)
        gdk_pixbuf_unref (pixbuf);
    bonobo_ui_toolbar_icon_set_pixbuf (
        BONOBO_UI_TOOLBAR_ICON (pbl->pixmap), mini);
    gtk_widget_set_usize (pbl->pixmap, 24, 24);

    /* Add the pixbuf to the cache */
    g_hash_table_insert (thumbnail_cache, pbl->cid, mini);
    g_timeout_add (5 * 60 * 1000, pixbuf_uncache, pbl->cid);

    gtk_signal_disconnect (GTK_OBJECT (pbl->eb), pbl->destroy_id);
    if (pbl->loader) {
        gdk_pixbuf_loader_close (pbl->loader);
        gtk_object_unref (GTK_OBJECT (pbl->loader));
        camel_object_unref (CAMEL_OBJECT (pbl->mstream));
    }
    g_free (pbl->type);
    g_free (pbl);
    return FALSE;
}

/* Stop the idle function and free the pbl structure
   as the widget that the pixbuf was to be rendered to
   has died on us. */
static void
embeddable_destroy_cb (GtkObject *embeddable,
               struct _PixbufLoader *pbl)
{
    g_idle_remove_by_data (pbl);
    if (pbl->mstream)
        camel_object_unref (CAMEL_OBJECT (pbl->mstream));
    
    if (pbl->loader) {
        gdk_pixbuf_loader_close (pbl->loader);
        gtk_object_destroy (GTK_OBJECT (pbl->loader));
    }
    
    g_free (pbl->type);
    g_free (pbl->cid);
    g_free (pbl);
};

static GtkWidget *
get_embedded_for_component (const char *iid, MailDisplay *md)
{
    GtkWidget *embedded;
    BonoboControlFrame *control_frame;
    Bonobo_PropertyBag prop_bag;
    
    /*
     * First try a control.
     */
    embedded = bonobo_widget_new_control (iid, NULL);
    if (embedded == NULL) {
        /*
         * No control, try an embeddable instead.
         */
        embedded = bonobo_widget_new_subdoc (iid, NULL);
        if (embedded != NULL) {
            /* FIXME: as of bonobo 0.18, there's an extra
             * client_site dereference in the BonoboWidget
             * destruction path that we have to balance out to
             * prevent problems.
             */
            bonobo_object_ref (BONOBO_OBJECT(bonobo_widget_get_client_site (
                BONOBO_WIDGET (embedded))));

            return embedded;
        }
    }

    if (embedded == NULL)
        return NULL;

    control_frame = bonobo_widget_get_control_frame (BONOBO_WIDGET (embedded));
        
    prop_bag = bonobo_control_frame_get_control_property_bag ( control_frame, NULL );
        
    if (prop_bag != CORBA_OBJECT_NIL){
        CORBA_Environment ev;
        /*
         * 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;

        CORBA_exception_init (&ev);
        
        from = camel_mime_message_get_from (md->current_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);
        CORBA_exception_free (&ev);
    }

    return embedded;
}

static void *
save_url (MailDisplay *md, const char *url)
{
    GHashTable *urls;
    CamelMimePart *part;

    urls = g_datalist_get_data (md->data, "part_urls");
    g_return_val_if_fail (urls != NULL, NULL);

    part = g_hash_table_lookup (urls, url);
    if (part == NULL) {
        GByteArray *ba;

        urls = g_datalist_get_data (md->data, "data_urls");
        g_return_val_if_fail (urls != NULL, NULL);

        /* See if it's some piece of cached data if it is then pretend it
         * is a mime part so that we can use the mime part saveing routines.
         * It is gross but it keeps duplicated code to a minimum and helps
         * out with ref counting and the like.
         */
        ba = g_hash_table_lookup (urls, url);
        if (ba) {
            CamelStream *memstream;
            CamelDataWrapper *wrapper;
            const char *name;
            
            name = strrchr (url, '/');
            name = name ? name : url;
            
            /* we have to copy the data here since the ba may be long gone
             * by the time the user actually saves the file
             */
            memstream = camel_stream_mem_new_with_buffer (ba->data, ba->len);           
            wrapper = camel_data_wrapper_new ();
            camel_data_wrapper_construct_from_stream (wrapper, memstream);
            camel_object_unref (CAMEL_OBJECT (memstream));
            part = camel_mime_part_new ();
            camel_medium_set_content_object (CAMEL_MEDIUM (part), wrapper);
            camel_object_unref (CAMEL_OBJECT (wrapper));
            camel_mime_part_set_filename (part, name);
        }
    } else {
        camel_object_ref (CAMEL_OBJECT (part));
    }

    if (part) {
        CamelDataWrapper *data;

        g_return_val_if_fail (CAMEL_IS_MIME_PART (part), NULL);

        data = camel_medium_get_content_object ((CamelMedium *)part);
        if (!mail_content_loaded (data, md, TRUE, NULL, NULL)) {
            return NULL;
        }

        save_part (part);
        camel_object_unref (CAMEL_OBJECT (part));
        return NULL;
    }
    
    g_warning ("part not found");
    return NULL;
}

static gboolean
do_attachment_header (GtkHTML *html, GtkHTMLEmbedded *eb,
              CamelMimePart *part, MailDisplay *md)
{
    GtkWidget *button, *mainbox, *hbox, *arrow, *popup;
    MailMimeHandler *handler;
    struct _PixbufLoader *pbl;

    pbl = g_new0 (struct _PixbufLoader, 1);
    if (g_strncasecmp (eb->type, "image/", 6) == 0) {
        CamelDataWrapper *content;

        content = camel_medium_get_content_object (CAMEL_MEDIUM (part));
        if (!camel_data_wrapper_is_offline (content)) {
            pbl->mstream = camel_stream_mem_new ();
            camel_data_wrapper_write_to_stream (content, pbl->mstream);
            camel_stream_reset (pbl->mstream);
        }
    }
    pbl->type = g_strdup (eb->type);
    pbl->cid = g_strdup (eb->classid + 6);
    pbl->pixmap = bonobo_ui_toolbar_icon_new ();
    pbl->eb = eb;
    pbl->destroy_id = gtk_signal_connect (GTK_OBJECT (eb), "destroy",
                          embeddable_destroy_cb, pbl);

    g_idle_add_full (G_PRIORITY_LOW, (GSourceFunc)pixbuf_gen_idle, 
             pbl, NULL);

    mainbox = gtk_hbox_new (FALSE, 0);

    button = gtk_button_new ();
    gtk_object_set_data (GTK_OBJECT (button), "MailDisplay", md);

    gtk_signal_connect (GTK_OBJECT (button), "clicked",
                GTK_SIGNAL_FUNC (button_press), part);

    hbox = gtk_hbox_new (FALSE, 2);
    gtk_container_set_border_width (GTK_CONTAINER (hbox), 2);

    if (mail_part_is_displayed_inline (part, md))
        arrow = gnome_stock_new_with_icon (GNOME_STOCK_PIXMAP_DOWN);
    else
        arrow = gnome_stock_new_with_icon (GNOME_STOCK_PIXMAP_FORWARD);
    gtk_box_pack_start (GTK_BOX (hbox), arrow, TRUE, TRUE, 0);
    gtk_box_pack_start (GTK_BOX (hbox), pbl->pixmap, TRUE, TRUE, 0);
    gtk_container_add (GTK_CONTAINER (button), hbox);

    popup = gtk_button_new ();
    gtk_container_add (GTK_CONTAINER (popup),
               gtk_arrow_new (GTK_ARROW_DOWN,
                      GTK_SHADOW_ETCHED_IN));

    gtk_object_set_data (GTK_OBJECT (popup), "MailDisplay", md);
    gtk_object_set_data (GTK_OBJECT (popup), "CamelMimePart", part);
    gtk_object_set_data_full (GTK_OBJECT (popup), "mime_type",
                  g_strdup (eb->type), (GDestroyNotify)g_free);

    gtk_signal_connect (GTK_OBJECT (popup), "button_press_event",
                GTK_SIGNAL_FUNC (pixmap_press), md->scroll);

    gtk_box_pack_start (GTK_BOX (mainbox), button, TRUE, TRUE, 0);
    gtk_box_pack_start (GTK_BOX (mainbox), popup, TRUE, TRUE, 0);
    gtk_widget_show_all (mainbox);

    handler = mail_lookup_handler (eb->type);
    if (handler && handler->builtin)
        gtk_widget_set_sensitive (button, TRUE);
    else
        gtk_widget_set_sensitive (button, FALSE);

    gtk_container_add (GTK_CONTAINER (eb), mainbox);

    return TRUE;
}

static gboolean
do_external_viewer (GtkHTML *html, GtkHTMLEmbedded *eb,
            CamelMimePart *part, MailDisplay *md)
{
    CamelDataWrapper *wrapper;
    OAF_ServerInfo *component;
    GtkWidget *embedded;
    BonoboObjectClient *server;
    Bonobo_PersistStream persist;   
    CORBA_Environment ev;
    GByteArray *ba;
    CamelStream *cstream;
    BonoboStream *bstream;

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

    embedded = get_embedded_for_component (component->iid, md);
    CORBA_free (component);
    if (!embedded)
        return FALSE;

    server = bonobo_widget_get_server (BONOBO_WIDGET (embedded));
    persist = (Bonobo_PersistStream) bonobo_object_client_query_interface (
        server, "IDL:Bonobo/PersistStream:1.0", NULL);
    if (persist == CORBA_OBJECT_NIL) {
        gtk_object_sink (GTK_OBJECT (embedded));
        return FALSE;
    }

    /* Write the data to a CamelStreamMem... */
    ba = g_byte_array_new ();
    cstream = camel_stream_mem_new_with_byte_array (ba);
    wrapper = camel_medium_get_content_object (CAMEL_MEDIUM (part));
    camel_data_wrapper_write_to_stream (wrapper, cstream);

    /* ...convert the CamelStreamMem to a BonoboStreamMem... */
    bstream = bonobo_stream_mem_create (ba->data, ba->len, TRUE, FALSE);
    camel_object_unref (CAMEL_OBJECT (cstream));

    /* ...and hydrate the PersistStream from the BonoboStream. */
    CORBA_exception_init (&ev);
    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 (GTK_OBJECT (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
do_signature (GtkHTML *html, GtkHTMLEmbedded *eb,
          CamelMimePart *part, MailDisplay *md)
{
    GtkWidget *button;
    struct _PixbufLoader *pbl;

    pbl = g_new0 (struct _PixbufLoader, 1);
    pbl->type = NULL;
    pbl->cid = g_strdup (eb->classid);
    pbl->pixmap = bonobo_ui_toolbar_icon_new ();
    pbl->eb = eb;
    pbl->destroy_id = gtk_signal_connect (GTK_OBJECT (eb), "destroy",
                          embeddable_destroy_cb, pbl);

    g_idle_add_full (G_PRIORITY_LOW, (GSourceFunc)pixbuf_gen_idle, 
             pbl, NULL);

    button = gtk_button_new ();
    gtk_object_set_data (GTK_OBJECT (button), "MailDisplay", md);
    gtk_signal_connect (GTK_OBJECT (button), "clicked",
                GTK_SIGNAL_FUNC (button_press), part);
    gtk_container_add (GTK_CONTAINER (button), pbl->pixmap);
    gtk_widget_show_all (button);
    gtk_container_add (GTK_CONTAINER (eb), button);

    return TRUE;
}

static gboolean
on_object_requested (GtkHTML *html, GtkHTMLEmbedded *eb, gpointer data)
{
    MailDisplay *md = data;
    GHashTable *urls;
    CamelMimePart *part;

    urls = g_datalist_get_data (md->data, "part_urls");
    if (!urls)
        return FALSE;

    if (!strncmp (eb->classid, "popup:", 6)) {
        part = g_hash_table_lookup (urls, eb->classid + 6);
        if (!CAMEL_IS_MIME_PART (part))
            return FALSE;
        return do_attachment_header (html, eb, part, md);
    } else if (!strncmp (eb->classid, "signature:", 10)) {
        part = g_hash_table_lookup (urls, eb->classid);
        if (!CAMEL_IS_MIME_PART (part))
            return FALSE;
        return do_signature (html, eb, part, md);
    } else if (!strncmp (eb->classid, "cid:", 4)) {
        part = g_hash_table_lookup (urls, eb->classid);
        if (!CAMEL_IS_MIME_PART (part))
            return FALSE;
        return do_external_viewer (html, eb, part, md);
    }

    return FALSE;
}
 
static void
load_http (MailDisplay *md, gpointer data)
{
    char *url = data;
    GHashTable *urls;
    GnomeVFSHandle *handle;
    GnomeVFSFileSize read;
    GByteArray *ba;
    char buf[8192];

    urls = g_datalist_get_data (md->data, "data_urls");
    ba = g_hash_table_lookup (urls, url);
    g_return_if_fail (ba != NULL);

    if (gnome_vfs_open (&handle, url, GNOME_VFS_OPEN_READ) != GNOME_VFS_OK) {
#if 0
        printf ("failed to open %s\n", url);
#endif
        g_free (url);
        return;
    }

    while (gnome_vfs_read (handle, buf, sizeof (buf), &read) == GNOME_VFS_OK)
        g_byte_array_append (ba, buf, read);
    gnome_vfs_close (handle);

#if 0
    if (!ba->len)
        printf ("no data in %s\n", url);
#endif

    g_free (url);
}

static void
ebook_callback (EBook *book, const gchar *addr, ECard *card, gpointer data)
{
    MailDisplay *md = data;

    if (card && md->current_message) {
        const CamelInternetAddress *from = camel_mime_message_get_from (md->current_message);
        const char *md_name = NULL, *md_addr = NULL;

        /* We are extra anal, in case we are dealing with some sort of pathological message
           w/o a From: header. */
        if (from != NULL && camel_internet_address_get (from, 0, &md_name, &md_addr)) {
            if (md_addr != NULL && !strcmp (addr, md_addr))
                mail_display_load_images (md);
        }
    }
}

static void
on_url_requested (GtkHTML *html, const char *url, GtkHTMLStream *handle,
          gpointer user_data)
{
    MailDisplay *md = user_data;
    GHashTable *urls;
    CamelMedium *medium;
    GByteArray *ba;
    
    urls = g_datalist_get_data (md->data, "part_urls");
    g_return_if_fail (urls != NULL);
    
    /* See if it refers to a MIME part (cid: or http:) */
    medium = g_hash_table_lookup (urls, url);
    if (medium) {
        CamelContentType *content_type;
        CamelDataWrapper *data;
        
        g_return_if_fail (CAMEL_IS_MEDIUM (medium));
        
        data = camel_medium_get_content_object (medium);
        if (!mail_content_loaded (data, md, FALSE, url, handle))
            return;
        
        content_type = camel_data_wrapper_get_mime_type_field (data);
        
        if (header_content_type_is (content_type, "text", "*")) {
            ba = mail_format_get_data_wrapper_text (data, md);
            if (ba) {
                gtk_html_write (html, handle, ba->data, ba->len);
                
                g_byte_array_free (ba, TRUE);
            }
        } else {
            CamelStream *html_stream;
            
            html_stream = mail_stream_gtkhtml_new (html, handle);
            camel_data_wrapper_write_to_stream (data, html_stream);
            camel_object_unref (CAMEL_OBJECT (html_stream));
        }
        
        gtk_html_end (html, handle, GTK_HTML_STREAM_OK);
        return;
    }

    urls = g_datalist_get_data (md->data, "data_urls");
    g_return_if_fail (urls != NULL);
    
    /* See if it's some piece of cached data */
    ba = g_hash_table_lookup (urls, url);
    if (ba) {
        if (ba->len) {
            gtk_html_write (html, handle, ba->data, ba->len);
            /* printf ("-- begin --\n");
               printf (ba->data);
               printf ("-- end --\n"); */
        }
        gtk_html_end (html, handle, GTK_HTML_STREAM_OK);
        return;
    }

    /* See if it's something we can load. */
    if (strncmp (url, "http:", 5) == 0) {
        if (mail_config_get_http_mode () == MAIL_CONFIG_HTTP_ALWAYS ||
            g_datalist_get_data (md->data, "load_images")) {
            ba = g_byte_array_new ();
            g_hash_table_insert (urls, g_strdup (url), ba);
            mail_display_stream_write_when_loaded (md, ba, url, load_http, handle,
                                   g_strdup (url));
        } else if (mail_config_get_http_mode () == MAIL_CONFIG_HTTP_SOMETIMES &&
               !g_datalist_get_data (md->data, "checking_from")) {
            const CamelInternetAddress *from = camel_mime_message_get_from (md->current_message);
            const char *name, *addr;

            g_datalist_set_data (md->data, "checking_from",
                         GINT_TO_POINTER (1));

            /* Make sure we aren't deal w/ some sort of a pathological message w/o a From: header */
            if (from != NULL && camel_internet_address_get (from, 0, &name, &addr))
                e_book_query_address_locally (addr, ebook_callback, md);
            else
                gtk_html_end (html, handle, GTK_HTML_STREAM_ERROR);
        }
    }
}

struct _load_content_msg {
    struct _mail_msg msg;

    MailDisplay *display;
    
    GtkHTMLStream *handle;
    gint redisplay_counter;
    gchar *url;
    CamelMimeMessage *message;
    void (*callback)(MailDisplay *, gpointer);
    gpointer data;
};

static char *
load_content_desc (struct _mail_msg *mm, int done)
{
    return g_strdup (_("Loading message content"));
}

static void
load_content_load (struct _mail_msg *mm)
{
    struct _load_content_msg *m = (struct _load_content_msg *)mm;

    m->callback (m->display, m->data);
}

static gboolean
try_part_urls (struct _load_content_msg *m)
{
    GHashTable *urls;
    CamelMedium *medium;

    urls = g_datalist_get_data (m->display->data, "part_urls");
    g_return_val_if_fail (urls != NULL, FALSE);

    /* See if it refers to a MIME part (cid: or http:) */
    medium = g_hash_table_lookup (urls, m->url);
    if (medium) {
        CamelDataWrapper *data;
        CamelStream *html_stream;
        
        g_return_val_if_fail (CAMEL_IS_MEDIUM (medium), FALSE);
        
        data = camel_medium_get_content_object (medium);
        if (!mail_content_loaded (data, m->display, FALSE, m->url, m->handle)) {
            g_warning ("This code should not be reached\n");
            return TRUE;
        }
        
        html_stream = mail_stream_gtkhtml_new (m->display->html, m->handle);
        camel_data_wrapper_write_to_stream (data, html_stream);
        camel_object_unref (CAMEL_OBJECT (html_stream));

        gtk_html_end (m->display->html, m->handle, GTK_HTML_STREAM_OK);
        return TRUE;
    }

    return FALSE;
}

static gboolean
try_data_urls (struct _load_content_msg *m)
{
    GHashTable *urls;
    GByteArray *ba;

    urls = g_datalist_get_data (m->display->data, "data_urls");
    ba   = g_hash_table_lookup (urls, m->url);

    printf ("url: %s data: %p len: %d\n", m->url, ba, ba ? ba->len : -1);
    if (ba) {
        if (ba->len) {
            printf ("writing ...\n");
            gtk_html_write (m->display->html, m->handle, ba->data, ba->len);
        }
        gtk_html_end (m->display->html, m->handle, GTK_HTML_STREAM_OK);
        return TRUE;
    }

    return FALSE;
}

static void
load_content_loaded (struct _mail_msg *mm)
{
    struct _load_content_msg *m = (struct _load_content_msg *)mm;

    if (m->display->current_message == m->message) {
        if (m->handle) {
            printf ("handle: %p orig: %d actual: %d\n", m->handle,
                m->redisplay_counter,
                m->display->redisplay_counter);
            if (m->redisplay_counter == m->display->redisplay_counter) {
                if (!try_part_urls (m) && !try_data_urls (m))
                    gtk_html_end (m->display->html, m->handle, GTK_HTML_STREAM_ERROR);
            }
        } else
            mail_display_redisplay (m->display, FALSE);
    }
}

static void
load_content_free (struct _mail_msg *mm)
{
    struct _load_content_msg *m = (struct _load_content_msg *)mm;

    g_free (m->url);
    gtk_object_unref (GTK_OBJECT (m->display));
    camel_object_unref (CAMEL_OBJECT (m->message));
}

static struct _mail_msg_op load_content_op = {
    load_content_desc,
    load_content_load,
    load_content_loaded,
    load_content_free,
};

static void
stream_write_or_redisplay_when_loaded (MailDisplay *md,
                       gconstpointer key,
                       const gchar *url,
                       void (*callback)(MailDisplay *, gpointer),
                       GtkHTMLStream *handle,
                       gpointer data)
{
    struct _load_content_msg *m;
    GHashTable *loading;

    loading = g_datalist_get_data (md->data, "loading");
    if (loading) {
        if (g_hash_table_lookup (loading, key))
            return;
    } else {
        loading = g_hash_table_new (NULL, NULL);
        g_datalist_set_data_full (md->data, "loading", loading,
                      (GDestroyNotify)g_hash_table_destroy);
    }
    g_hash_table_insert (loading, (gpointer)key, GINT_TO_POINTER (1));

    m = mail_msg_new (&load_content_op, NULL, sizeof (*m));
    m->display = md;
    m->handle = handle;
    m->url = g_strdup (url);
    m->redisplay_counter = md->redisplay_counter;
    gtk_object_ref (GTK_OBJECT (m->display));
    m->message = md->current_message;
    camel_object_ref (CAMEL_OBJECT (m->message));
    m->callback = callback;
    m->data = data;

    e_thread_put (mail_thread_queued, (EMsg *)m);
    return;
}

void
mail_display_stream_write_when_loaded (MailDisplay *md,
                       gconstpointer key,
                       const gchar *url,
                       void (*callback)(MailDisplay *, gpointer),
                       GtkHTMLStream *handle,
                       gpointer data)
{
    stream_write_or_redisplay_when_loaded (md, key, url, callback, handle, data);
}

void
mail_display_redisplay_when_loaded (MailDisplay *md,
                    gconstpointer key,
                    void (*callback)(MailDisplay *, gpointer),
                    gpointer data)
{
    stream_write_or_redisplay_when_loaded (md, key, NULL, callback, NULL, data);
}

void
mail_html_write (GtkHTML *html, GtkHTMLStream *stream,
         const char *format, ...)
{
    char *buf;
    va_list ap;
    
    va_start (ap, format);
    buf = g_strdup_vprintf (format, ap);
    va_end (ap);
    gtk_html_write (html, stream, buf, strlen (buf));
    /* printf (buf); */
    g_free (buf);
}

void
mail_text_write (GtkHTML *html, GtkHTMLStream *stream,
         const char *format, ...)
{
    char *buf, *htmltext;
    va_list ap;
    
    va_start (ap, format);
    buf = g_strdup_vprintf (format, ap);
    va_end (ap);
    
    htmltext = e_text_to_html_full (buf, E_TEXT_TO_HTML_CONVERT_URLS |
                    E_TEXT_TO_HTML_CONVERT_ADDRESSES |
                    E_TEXT_TO_HTML_CONVERT_NL |
                    E_TEXT_TO_HTML_CONVERT_SPACES |
                    (mail_config_get_citation_highlight () ? E_TEXT_TO_HTML_MARK_CITATION : 0),
                    mail_config_get_citation_color ());
    
    g_free (buf);
    
    gtk_html_write (html, stream, "<tt>", 4);
    gtk_html_write (html, stream, htmltext, strlen (htmltext));
    gtk_html_write (html, stream, "</tt>", 5);
    g_free (htmltext);
}

void
mail_error_write (GtkHTML *html, GtkHTMLStream *stream,
          const char *format, ...)
{
    char *buf, *htmltext;
    va_list ap;
    
    va_start (ap, format);
    buf = g_strdup_vprintf (format, ap);
    va_end (ap);
    
    htmltext = e_text_to_html (buf, E_TEXT_TO_HTML_CONVERT_NL | E_TEXT_TO_HTML_CONVERT_URLS);
    g_free (buf);
    
    gtk_html_stream_printf (stream, "<em><font color=red>");
    gtk_html_stream_write (stream, htmltext, strlen (htmltext));
    gtk_html_stream_printf (stream, "</font></em>");
    
    g_free (htmltext);
}

static void
clear_data (CamelObject *object, gpointer event_data, gpointer user_data)
{
    GData *data = user_data;

    g_datalist_clear (&data);
}

/**
 * mail_display_redisplay:
 * @mail_display: the mail display object
 * @unscroll: specifies whether or not to lose current scroll
 *
 * Force a redraw of the message display.
 **/
void
mail_display_redisplay (MailDisplay *md, gboolean unscroll)
{
    md->last_active = NULL;
    md->redisplay_counter ++;
    /* printf ("md %p redisplay %d\n", md, md->redisplay_counter); */

    md->stream = gtk_html_begin (GTK_HTML (md->html));
    if (!unscroll) {
        /* This is a hack until there's a clean way to do this. */
        GTK_HTML (md->html)->engine->newPage = FALSE;
    }
    
    mail_html_write (md->html, md->stream, "<!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");
    mail_html_write (md->html, md->stream, "<body marginwidth=0 marginheight=0>\n");
    
    if (md->current_message) {
        if (md->display_style == MAIL_CONFIG_DISPLAY_SOURCE)
            mail_format_raw_message (md->current_message, md);
        else
            mail_format_mime_message (md->current_message, md);
    }
    
    mail_html_write (md->html, md->stream, "</body></html>\n");
    gtk_html_end (md->html, md->stream, GTK_HTML_STREAM_OK);
    md->stream = NULL;
}


/**
 * mail_display_set_message:
 * @mail_display: the mail display object
 * @medium: the input camel medium, or %NULL
 *
 * Makes the mail_display object show the contents of the medium
 * param.
 **/
void 
mail_display_set_message (MailDisplay *md, CamelMedium *medium)
{
    /* For the moment, we deal only with CamelMimeMessage, but in
     * the future, we should be able to deal with any medium.
     */
    if (medium && !CAMEL_IS_MIME_MESSAGE (medium))
        return;

    /* Clean up from previous message. */
    if (md->current_message)
        camel_object_unref (CAMEL_OBJECT (md->current_message));

    md->current_message = (CamelMimeMessage*)medium;

    g_datalist_init (md->data);
    mail_display_redisplay (md, TRUE);
    if (medium) {
        camel_object_hook_event (CAMEL_OBJECT (medium), "finalize",
                     clear_data, *(md->data));
    }
}

/**
 * mail_display_set_message:
 * @mail_display: the mail display object
 * @medium: the input camel medium, or %NULL
 *
 * Makes the mail_display object show the contents of the medium
 * param.
 **/
void
mail_display_set_charset (MailDisplay *mail_display, const char *charset)
{
    g_free (mail_display->charset);
    mail_display->charset = g_strdup (charset);
    
    mail_display_queue_redisplay (mail_display);
}

/**
 * mail_display_load_images:
 * @md: the mail display object
 *
 * Load all HTTP images in the current message
 **/
void
mail_display_load_images (MailDisplay *md)
{
    g_datalist_set_data (md->data, "load_images", GINT_TO_POINTER (1));
    mail_display_redisplay (md, FALSE);
}

/*----------------------------------------------------------------------*
 *                     Standard Gtk+ Class functions
 *----------------------------------------------------------------------*/

static void
mail_display_init (GtkObject *object)
{
    MailDisplay *mail_display = MAIL_DISPLAY (object);

    mail_display->current_message   = NULL;
    mail_display->scroll            = NULL;
    mail_display->html              = NULL;
    mail_display->redisplay_counter = 0;
    mail_display->stream            = NULL;
    mail_display->last_active       = NULL;
    mail_display->idle_id           = 0;
    mail_display->selection         = NULL;
    mail_display->current_message   = NULL;
    mail_display->data              = NULL;

    mail_display->invisible         = gtk_invisible_new ();

    mail_display->display_style     = mail_config_get_message_display_style ();
}

static void
mail_display_destroy (GtkObject *object)
{
    MailDisplay *mail_display = MAIL_DISPLAY (object);

    g_free (mail_display->charset);
    g_free (mail_display->selection);

    g_datalist_clear (mail_display->data);
    g_free (mail_display->data);

    gtk_widget_unref (mail_display->invisible);

    mail_display_parent_class->destroy (object);
}

static void
invisible_selection_get_callback (GtkWidget *widget,
                  GtkSelectionData *selection_data,
                  guint info,
                  guint time,
                  void *data)
{
    MailDisplay *display;

    display = MAIL_DISPLAY (data);
    
    if (!display->selection)
        return;
    
    g_assert (info == 1);

    gtk_selection_data_set (selection_data, GDK_SELECTION_TYPE_STRING, 8,
                display->selection, strlen (display->selection));
}

static gint
invisible_selection_clear_event_callback (GtkWidget *widget,
                      GdkEventSelection *event,
                      void *data)
{
    MailDisplay *display;

    display = MAIL_DISPLAY (data);

    g_free (display->selection);
    display->selection = NULL;

    return TRUE;
}

static void
mail_display_class_init (GtkObjectClass *object_class)
{
    object_class->destroy = mail_display_destroy;
    mail_display_parent_class = gtk_type_class (PARENT_TYPE);

    thumbnail_cache = g_hash_table_new (g_str_hash, g_str_equal);
}

static void
link_open_in_browser (GtkWidget *w, MailDisplay *mail_display)
{
    on_link_clicked (mail_display->html, mail_display->html->pointer_url,
             mail_display);
}

#if 0
static void
link_save_as (GtkWidget *w, MailDisplay *mail_display)
{
    g_print ("FIXME save %s\n", mail_display->html->pointer_url);
}
#endif

static void
link_copy_location (GtkWidget *w, MailDisplay *mail_display)
{
    GdkAtom clipboard_atom;

    g_free (mail_display->selection);
    mail_display->selection = g_strdup (mail_display->html->pointer_url);

    clipboard_atom = gdk_atom_intern ("CLIPBOARD", FALSE);
    if (clipboard_atom == GDK_NONE)
        return; /* failed */

    /* We don't check the return values of the following since there is not
     * much we can do if we cannot assert the selection.
     */

    gtk_selection_owner_set (GTK_WIDGET (mail_display->invisible),
                 GDK_SELECTION_PRIMARY,
                 GDK_CURRENT_TIME);
    gtk_selection_owner_set (GTK_WIDGET (mail_display->invisible),
                 clipboard_atom,
                 GDK_CURRENT_TIME);
}

static void
image_save_as (GtkWidget *w, MailDisplay *mail_display)
{
    const char *src;

    src = gtk_object_get_data (GTK_OBJECT (mail_display), "current_src_uri");

    g_warning ("loading uri=%s", src);
    
    save_url (mail_display, src);
}

enum {
    /* 
     * This is used to mask the link specific menu items.
     */
    MASK_URL = 1,

    /*
     * This is used to mask src specific menu items.
     */
    MASK_SRC = 2
};

#define SEPARATOR  { "", NULL, (NULL), NULL,  0 }
#define TERMINATOR { NULL, NULL, (NULL), NULL,  0 }

static EPopupMenu link_menu [] = {
    { N_("Open Link in Browser"), NULL,
      GTK_SIGNAL_FUNC (link_open_in_browser),  NULL,  MASK_URL },
    { N_("Copy Link Location"), NULL,
      GTK_SIGNAL_FUNC (link_copy_location), NULL,  MASK_URL },
#if 0
    { N_("Save Link as (FIXME)"), NULL,
      GTK_SIGNAL_FUNC (link_save_as), NULL,  MASK_URL },
#endif
    { N_("Save Image as..."), NULL,
      GTK_SIGNAL_FUNC (image_save_as), NULL, MASK_SRC }, 
     
    TERMINATOR
};


/*
 *  Create a window and popup our widget, with reasonable semantics for the popup
 *  disappearing, etc.
 */

typedef struct _PopupInfo PopupInfo;
struct _PopupInfo {
    GtkWidget *w;
    GtkWidget *win;
    guint destroy_timeout;
    guint widget_destroy_handle;
    Bonobo_EventSource_ListenerId listener_id;
    gboolean hidden;
};

/* Aiieee!  Global Data! */
static GtkWidget *the_popup = NULL;

static void
popup_info_free (PopupInfo *pop)
{
    if (pop) {
        if (pop->destroy_timeout)
            gtk_timeout_remove (pop->destroy_timeout);

        bonobo_event_source_client_remove_listener (bonobo_widget_get_objref (BONOBO_WIDGET (pop->w)),
                                pop->listener_id,
                                NULL);

        g_free (pop);
    }
}

static void
popup_window_destroy_cb (GtkWidget *w, gpointer user_data)
{
    PopupInfo *pop = (PopupInfo *) user_data;

    the_popup = NULL;

    popup_info_free (pop);
}

static gint
popup_timeout_cb (gpointer user_data)
{
    PopupInfo *pop = (PopupInfo *) user_data;

    pop->destroy_timeout = 0;
    gtk_widget_destroy (pop->win);

    return 0;
}

static gint
popup_enter_cb (GtkWidget *w, GdkEventCrossing *ev, gpointer user_data)
{
    PopupInfo *pop = (PopupInfo *) user_data;

    if (pop->destroy_timeout)
        gtk_timeout_remove (pop->destroy_timeout);
    pop->destroy_timeout = 0;

    return 0;
}

static gint
popup_leave_cb (GtkWidget *w, GdkEventCrossing *ev, gpointer user_data)
{
    PopupInfo *pop = (PopupInfo *) user_data;

    if (pop->destroy_timeout)
        gtk_timeout_remove (pop->destroy_timeout);

    if (!pop->hidden)
        pop->destroy_timeout = gtk_timeout_add (500, popup_timeout_cb, pop);

    return 0;
}

static void
popup_realize_cb (GtkWidget *widget, gpointer user_data)
{
    PopupInfo *pop = (PopupInfo *) user_data;

    gtk_widget_add_events (pop->win, GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK);

    if (pop->destroy_timeout == 0) {
        if (!pop->hidden) {
            pop->destroy_timeout = gtk_timeout_add (5000, popup_timeout_cb, pop);
        } else {
            pop->destroy_timeout = 0;
        }
    }
}

static void
popup_size_allocate_cb (GtkWidget *widget, GtkAllocation *alloc, gpointer user_data)
{
    gint x, y, w, h, xmax, ymax;

    xmax = gdk_screen_width ();
    ymax = gdk_screen_height ();

    gdk_window_get_pointer (NULL, &x, &y, NULL);
    w = alloc->width;
    h = alloc->height;
    x = CLAMP (x - w/2, 0, xmax - w);
    y = CLAMP (y - h/2, 0, ymax - h);
    gtk_widget_set_uposition (widget, x, y);

}

static PopupInfo *
make_popup_window (GtkWidget *w)
{
    PopupInfo *pop = g_new0 (PopupInfo, 1);
    GtkWidget *fr;

    /* Only allow for one popup at a time.  Ugly. */
    if (the_popup)
        gtk_widget_destroy (the_popup);

    pop->w = w;
    the_popup = pop->win = gtk_window_new (GTK_WINDOW_POPUP);
    fr = gtk_frame_new (NULL);

    gtk_container_add (GTK_CONTAINER (pop->win), fr);
    gtk_container_add (GTK_CONTAINER (fr), w);

    gtk_window_set_policy (GTK_WINDOW (pop->win), FALSE, FALSE, FALSE);

    gtk_signal_connect (GTK_OBJECT (pop->win),
                "destroy",
                GTK_SIGNAL_FUNC (popup_window_destroy_cb),
                pop);
    gtk_signal_connect (GTK_OBJECT (pop->win),
                "enter_notify_event",
                GTK_SIGNAL_FUNC (popup_enter_cb),
                pop);
    gtk_signal_connect (GTK_OBJECT (pop->win),
                "leave_notify_event",
                GTK_SIGNAL_FUNC (popup_leave_cb),
                pop);
    gtk_signal_connect_after (GTK_OBJECT (pop->win),
                  "realize",
                  GTK_SIGNAL_FUNC (popup_realize_cb),
                  pop);
    gtk_signal_connect (GTK_OBJECT (pop->win),
                "size_allocate",
                GTK_SIGNAL_FUNC (popup_size_allocate_cb),
                pop);

    gtk_widget_show (w);
    gtk_widget_show (fr);
    gtk_widget_show (pop->win);

    return pop;
}

static void
listener_cb (BonoboListener    *listener,
         char              *event_name,
         CORBA_any         *any,
         CORBA_Environment *ev,
         gpointer           user_data)
{
    PopupInfo *pop;
    char *type;

    pop = user_data;

    if (pop->destroy_timeout)
        gtk_timeout_remove (pop->destroy_timeout);
    pop->destroy_timeout = 0;
    
    type = bonobo_event_subtype (event_name);

    if (!strcmp (type, "Destroy")) {
        gtk_widget_destroy (GTK_WIDGET (pop->win));
    } else if (!strcmp (type, "Hide")) {
        pop->hidden = TRUE;
        gtk_widget_hide (GTK_WIDGET (pop->win));
    }

    g_free (type);
}

static int
html_button_press_event (GtkWidget *widget, GdkEventButton *event, MailDisplay *mail_display)
{
    g_return_val_if_fail (widget != NULL, FALSE);
    g_return_val_if_fail (event != NULL, FALSE);

    if (event->type == GDK_BUTTON_PRESS) {
        if (event->button == 3) {
            HTMLEngine *e;
            HTMLPoint *point;
            GtkWidget *popup_thing;

            e     = GTK_HTML (widget)->engine;
            point = html_engine_get_point_at (e, event->x + e->x_offset, event->y + e->y_offset, FALSE);
            
            if (point) {
                const gchar *url;
                const gchar *src;

                url = html_object_get_url (point->object);
                src = html_object_get_src (point->object);

                if (url && !g_strncasecmp (url, "mailto:", 7)) {
                    PopupInfo *pop;
                    gchar *url_decoded = g_strdup (url);
                    camel_url_decode (url_decoded);

                    popup_thing = bonobo_widget_new_control ("OAFIID:GNOME_Evolution_Addressbook_AddressPopup",
                                         CORBA_OBJECT_NIL);

                    bonobo_widget_set_property (BONOBO_WIDGET (popup_thing),
                                    "email", url_decoded+7,
                                    NULL);
                    g_free (url_decoded);
                    
                    pop = make_popup_window (popup_thing);

                    pop->listener_id =
                        bonobo_event_source_client_add_listener (bonobo_widget_get_objref (BONOBO_WIDGET (popup_thing)),
                                             listener_cb, NULL, NULL, pop);

                } else if (url || src) {
                        gint hide_mask = 0;

                    if (!url)
                        hide_mask |= MASK_URL;

                    if (!src)
                        hide_mask |= MASK_SRC;

                    g_free (gtk_object_get_data (GTK_OBJECT (mail_display), "current_src_uri"));
                    gtk_object_set_data (GTK_OBJECT (mail_display), "current_src_uri", g_strdup (src));
                    
                    e_popup_menu_run (link_menu, (GdkEvent *) event, 0, hide_mask, mail_display);

                }

                html_point_destroy (point);
            }

            return TRUE;
        }
    }
        
    return FALSE;
}

static inline void
set_underline (HTMLEngine *e, HTMLObject *o, gboolean underline)
{
    HTMLText *text = HTML_TEXT (o);

    html_text_set_font_style (text, e, underline
                  ? html_text_get_font_style (text) | GTK_HTML_FONT_STYLE_UNDERLINE
                  : html_text_get_font_style (text) & ~GTK_HTML_FONT_STYLE_UNDERLINE);
    html_engine_queue_draw (e, o);
}

static void
update_active (GtkWidget *widget, gint x, gint y, MailDisplay *mail_display)
{
    HTMLEngine *e;
    HTMLPoint *point;
    const gchar *email;

    e = GTK_HTML (widget)->engine;

    point = html_engine_get_point_at (e, x + e->x_offset, y + e->y_offset, FALSE);
    if (mail_display->last_active && (!point || mail_display->last_active != point->object)) {
        set_underline (e, HTML_OBJECT (mail_display->last_active), FALSE);
        mail_display->last_active = NULL;
    }
    if (point) {
        email = (const gchar *) html_object_get_data (point->object, "email");
        if (email && html_object_is_text (point->object)) {
            set_underline (e, point->object, TRUE);
            mail_display->last_active = point->object;
        }
        html_point_destroy (point);
    }
}

static gint
html_enter_notify_event (GtkWidget *widget, GdkEventCrossing *event, MailDisplay *mail_display)
{
    update_active (widget, event->x, event->y, mail_display);

    return TRUE;
}

static gint
html_motion_notify_event (GtkWidget *widget, GdkEventMotion *event, MailDisplay *mail_display)
{
    gint x, y;

    g_return_val_if_fail (widget != NULL, 0);
    g_return_val_if_fail (GTK_IS_HTML (widget), 0);
    g_return_val_if_fail (event != NULL, 0);

    if (event->is_hint)
        gdk_window_get_pointer (GTK_LAYOUT (widget)->bin_window, &x, &y, NULL);
    else {
        x = event->x;
        y = event->y;
    }

    update_active (widget, x, y, mail_display);

    return TRUE;
}

static void
html_iframe_created (GtkWidget *w, GtkHTML *iframe, MailDisplay *mail_display)
{
    gtk_signal_connect (GTK_OBJECT (iframe), "button_press_event",
                GTK_SIGNAL_FUNC (html_button_press_event), mail_display);
    gtk_signal_connect (GTK_OBJECT (iframe), "motion_notify_event",
                GTK_SIGNAL_FUNC (html_motion_notify_event), mail_display);
    gtk_signal_connect (GTK_OBJECT (iframe), "enter_notify_event",
                GTK_SIGNAL_FUNC (html_enter_notify_event), mail_display);
}

static GNOME_Evolution_ShellView
retrieve_shell_view_interface_from_control (BonoboControl *control)
{
    Bonobo_ControlFrame control_frame;
    GNOME_Evolution_ShellView shell_view_interface;
    CORBA_Environment ev;

    control_frame = bonobo_control_get_control_frame (control);

    if (control_frame == NULL)
        return CORBA_OBJECT_NIL;

    CORBA_exception_init (&ev);
    shell_view_interface = Bonobo_Unknown_queryInterface (control_frame,
                                  "IDL:GNOME/Evolution/ShellView:1.0",
                                  &ev);
    CORBA_exception_free (&ev);

    if (shell_view_interface != CORBA_OBJECT_NIL)
        gtk_object_set_data (GTK_OBJECT (control),
                     "mail_threads_shell_view_interface",
                     shell_view_interface);
    else
        g_warning ("Control frame doesn't have Evolution/ShellView.");

    return shell_view_interface;
}

static void
set_status_message (const char *message, int busy)
{
    EList *controls;
    EIterator *it;

    controls = folder_browser_factory_get_control_list ();
    for (it = e_list_get_iterator (controls); e_iterator_is_valid (it); e_iterator_next (it)) {
        BonoboControl *control;
        GNOME_Evolution_ShellView shell_view_interface;
        CORBA_Environment ev;

        control = BONOBO_CONTROL (e_iterator_get (it));

        shell_view_interface = gtk_object_get_data (GTK_OBJECT (control), "mail_threads_shell_view_interface");

        if (shell_view_interface == CORBA_OBJECT_NIL)
            shell_view_interface = retrieve_shell_view_interface_from_control (control);

        CORBA_exception_init (&ev);

        if (shell_view_interface != CORBA_OBJECT_NIL) {

            if (message != NULL)
                GNOME_Evolution_ShellView_setMessage (shell_view_interface,
                                      message[0] ? message: "",
                                      busy,
                                      &ev);
        }

        CORBA_exception_free (&ev);

        /* yeah we only set the first one.  Why?  Because it seems to leave
           random ones lying around otherwise.  Shrug. */
        break;
    }
    gtk_object_unref (GTK_OBJECT(it));
}

/* For now show every url but possibly limit it to showing only http:
   or ftp: urls */
static void
html_on_url (GtkHTML *html,
         const char *url,
         MailDisplay *mail_display)
{
    static char *previous_url = NULL;

    /* This all looks silly but yes, this is the proper way to mix
           GtkHTML's on_url with BonoboUIComponent statusbar */
    if (!url || (previous_url && (strcmp (url, previous_url) != 0)))
        set_status_message ("", FALSE);
    if (url) {
        set_status_message (url, FALSE);
        g_free (previous_url);
        previous_url = g_strdup (url);
    }
}

GtkWidget *
mail_display_new (void)
{
    MailDisplay *mail_display = gtk_type_new (mail_display_get_type ());
    GtkWidget *scroll, *html;
    GdkAtom clipboard_atom;
    HTMLTokenizer *tok;

    gtk_box_set_homogeneous (GTK_BOX (mail_display), FALSE);
    gtk_widget_show (GTK_WIDGET (mail_display));

    scroll = e_scroll_frame_new (NULL, NULL);
    e_scroll_frame_set_policy (E_SCROLL_FRAME (scroll),
                   GTK_POLICY_AUTOMATIC,
                   GTK_POLICY_AUTOMATIC);
    e_scroll_frame_set_shadow_type (E_SCROLL_FRAME (scroll), GTK_SHADOW_IN);
    gtk_box_pack_start_defaults (GTK_BOX (mail_display), GTK_WIDGET (scroll));
    gtk_widget_show (GTK_WIDGET (scroll));

    html = gtk_html_new ();
    tok = e_searching_tokenizer_new ();
    html_engine_set_tokenizer (GTK_HTML (html)->engine, tok);
    gtk_object_unref (GTK_OBJECT (tok));

    gtk_html_set_default_content_type (GTK_HTML (html),
                       "text/html; charset=utf-8");

    gtk_html_set_editable (GTK_HTML (html), FALSE);
    gtk_signal_connect (GTK_OBJECT (html), "url_requested",
                GTK_SIGNAL_FUNC (on_url_requested),
                mail_display);
    gtk_signal_connect (GTK_OBJECT (html), "object_requested",
                GTK_SIGNAL_FUNC (on_object_requested),
                mail_display);
    gtk_signal_connect (GTK_OBJECT (html), "link_clicked",
                GTK_SIGNAL_FUNC (on_link_clicked),
                mail_display);
    gtk_signal_connect (GTK_OBJECT (html), "button_press_event",
                GTK_SIGNAL_FUNC (html_button_press_event), mail_display);
    gtk_signal_connect (GTK_OBJECT (html), "motion_notify_event",
                GTK_SIGNAL_FUNC (html_motion_notify_event), mail_display);
    gtk_signal_connect (GTK_OBJECT (html), "enter_notify_event",
                GTK_SIGNAL_FUNC (html_enter_notify_event), mail_display);
    gtk_signal_connect (GTK_OBJECT (html), "iframe_created",
                GTK_SIGNAL_FUNC (html_iframe_created), mail_display);
    gtk_signal_connect (GTK_OBJECT (html), "on_url",
                GTK_SIGNAL_FUNC (html_on_url), mail_display);

    gtk_container_add (GTK_CONTAINER (scroll), html);
    gtk_widget_show (GTK_WIDGET (html));

    gtk_signal_connect (GTK_OBJECT (mail_display->invisible), "selection_get",
                GTK_SIGNAL_FUNC (invisible_selection_get_callback), mail_display);
    gtk_signal_connect (GTK_OBJECT (mail_display->invisible), "selection_clear_event",
                GTK_SIGNAL_FUNC (invisible_selection_clear_event_callback), mail_display);

    gtk_selection_add_target (mail_display->invisible,
                  GDK_SELECTION_PRIMARY, GDK_SELECTION_TYPE_STRING, 1);

    clipboard_atom = gdk_atom_intern ("CLIPBOARD", FALSE);
    if (clipboard_atom != GDK_NONE)
        gtk_selection_add_target (mail_display->invisible,
                      clipboard_atom, GDK_SELECTION_TYPE_STRING, 1);

    mail_display->scroll = E_SCROLL_FRAME (scroll);
    mail_display->html = GTK_HTML (html);
    mail_display->stream = NULL;
    mail_display->last_active = NULL;
    mail_display->data = g_new0 (GData *, 1);
    g_datalist_init (mail_display->data);

    return GTK_WIDGET (mail_display);
}

E_MAKE_TYPE (mail_display, "MailDisplay", MailDisplay, mail_display_class_init, mail_display_init, PARENT_TYPE);