path: root/mail/mail-display.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Authors: Dan Winship <danw@ximian.com>
 *           Jeffrey Stedfast <fejj@ximian.com>
 *           Michael Zucchi <notzed@ximian.com>
 *           Miguel de Icaza <miguel@ximian.com>
 *           Larry Ewing <lewing@ximian.com>
 *
 *  Copyright 2002 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 <sys/stat.h>
#include <ctype.h>
#include <fcntl.h>
#include <errno.h>

#include <gtk/gtkinvisible.h>
#include <libgnome/gnome-program.h>

#include <gconf/gconf.h>
#include <gconf/gconf-client.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-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 <gtkhtml/gtkhtml.h>
#include <gtkhtml/gtkhtml-embedded.h>
#include <gtkhtml/htmlengine.h>
#include <gtkhtml/htmlobject.h>
#include <gtkhtml/htmltext.h>
#include <gtkhtml/htmlinterval.h>
#include <gtkhtml/gtkhtml-stream.h>

#include <libsoup/soup-message.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-display-stream.h"
#include "folder-browser.h"
#include "mail-config.h"
#include "mail-display.h"
#include "mail-format.h"
#include "mail-ops.h"
#include "mail-mt.h"
#include "mail.h"

#include "camel/camel-data-cache.h"

#include "art/empty.xpm"

#define d(x)

struct _MailDisplayPrivate {

    /* because we want to control resource usage, we need our own queues, etc */
    EDList fetch_active;
    EDList fetch_queue;

    /* used to try and make some sense with progress reporting */
    int fetch_total;
    int fetch_total_done;

    /* bit hackish, 'fake' an async message and processing,
       so we can use that to get cancel and report progress */
    struct _mail_msg *fetch_msg ;
    GIOChannel *fetch_cancel_channel;
    guint fetch_cancel_watch;
};

/* max number of connections to download images */
#define FETCH_MAX_CONNECTIONS (4)

/* path to http cache in fetch_cache */
#define FETCH_HTTP_CACHE "http"

/* for asynchronously downloading remote content */
struct _remote_data {
    struct _remote_data *next;
    struct _remote_data *prev;

    MailDisplay *md;    /* not ref'd */

    SoupMessage *msg;
    char *uri;
    GtkHTML *html;
    GtkHTMLStream *stream;
    CamelStream *cstream;   /* cache stream */
    size_t length;
    size_t total;
};

static void fetch_remote(MailDisplay *md, const char *uri, GtkHTML *html, GtkHTMLStream *stream);
static void fetch_cancel(MailDisplay *md);
static void fetch_next(MailDisplay *md);
static void fetch_data(SoupMessage *req, void *data);
static void fetch_free(struct _remote_data *rd);
static void fetch_done(SoupMessage *req, void *data);

/* global http cache, relies on external evolution_dir as well */
static CamelDataCache *fetch_cache;

#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;

/* Drag & Drop types */
#define TEXT_URI_LIST_TYPE       "text/uri-list"

enum DndTargetType {
    DND_TARGET_TYPE_TEXT_URI_LIST,
    DND_TARGET_TYPE_PART_MIME_TYPE
};

static GtkTargetEntry drag_types[] = {
    { TEXT_URI_LIST_TYPE, 0, DND_TARGET_TYPE_TEXT_URI_LIST },
    { NULL, 0, DND_TARGET_TYPE_PART_MIME_TYPE }
};

static const int num_drag_types = sizeof (drag_types) / sizeof (drag_types[0]);

/*----------------------------------------------------------------------*
 *                        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, ret = FALSE;
    
    g_return_val_if_fail (CAMEL_IS_MIME_PART (part), FALSE);
    
    fd = open (name, O_WRONLY | O_CREAT | O_EXCL, 0666);
    if (fd == -1 && errno == EEXIST && !unique) {
        GtkWidget *dialog;
        int button;
        
        dialog = gtk_message_dialog_new (NULL, 0, GTK_MESSAGE_QUESTION, GTK_BUTTONS_YES_NO,
                         _("File `%s' already exists.\nOverwrite it?"),
                         name);
        
        g_object_set (dialog, "title", _("Overwrite file?"), "allow_grow", TRUE, NULL);
        button = gtk_dialog_run ((GtkDialog *) dialog);
        gtk_widget_destroy (dialog);
        
        if (button != GTK_RESPONSE_YES)
            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;
    char *safe, *p;
    
    name = part ? camel_mime_part_get_filename (part) : NULL;
    
    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, '/');
    if (p)
        e_filename_make_safe (p + 1);
    
    return safe;
}

static void
save_data_cb (GtkWidget *widget, gpointer user_data)
{
    GtkFileSelection *file_select;
    GConfClient *gconf;
    char *dir;
    
    file_select = (GtkFileSelection *) gtk_widget_get_ancestor (widget, GTK_TYPE_FILE_SELECTION);
    
    /* 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 */
    dir = g_path_get_dirname (gtk_file_selection_get_filename (file_select));
    gconf_client_set_string (gconf, "/apps/evolution/mail/save_dir", dir, NULL);
    g_free (dir);
    
    gtk_widget_destroy (GTK_WIDGET (file_select));
}

static void
save_destroy_cb (CamelMimePart *part, GObject *deadbeef) 
{
    camel_object_unref (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 (!strncasecmp (url, "news:", 5) || !strncasecmp (url, "nntp:", 5)) {
        g_warning ("Can't handle news URLs yet.");
    } else if (!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, *dir, *base;
    GConfClient *gconf;
    
    camel_object_ref (CAMEL_OBJECT (part));
    
    gconf = gconf_client_get_default ();
    dir = gconf_client_get_string (gconf, "/apps/evolution/mail/save_dir", NULL);
    filename = make_safe_filename (dir, part);
    g_free (dir);
    
    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 */
    base = g_path_get_basename (filename);
    gtk_entry_set_text (GTK_ENTRY (file_select->selection_entry), base);
    g_free (filename);
    g_free (base);
    
    g_signal_connect (file_select->ok_button, "clicked", 
              G_CALLBACK (save_data_cb), part);
    
    g_signal_connect_swapped (file_select->cancel_button, "clicked",
                  G_CALLBACK (gtk_widget_destroy), file_select);
    
    g_object_weak_ref ((GObject *) file_select, (GWeakNotify) save_destroy_cb, part);
    
    gtk_widget_show (GTK_WIDGET (file_select));
}

static void
save_cb (GtkWidget *widget, gpointer user_data)
{
    CamelMimePart *part = g_object_get_data((user_data), "CamelMimePart");
    
    save_part (part);
}

static void
launch_cb (GtkWidget *widget, gpointer user_data)
{
    CamelMimePart *part = g_object_get_data(user_data, "CamelMimePart");
    MailMimeHandler *handler;
    GList *apps, *children, *c;
    GnomeVFSMimeApplication *app;
    char *command, *filename;
    const char *tmpdir;
    
    handler = mail_lookup_handler (g_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_get_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) {
        GtkWidget *dialog;
        
        dialog = gtk_message_dialog_new (NULL, 0, GTK_MESSAGE_ERROR, GTK_RESPONSE_CLOSE,
                         _("Could not create temporary directory: %s"),
                         g_strerror (errno));
        
        /* FIXME: this should be async */
        gtk_dialog_run ((GtkDialog *) dialog);
        gtk_widget_destroy (dialog);
        return;
    }
    
    filename = make_safe_filename (tmpdir, part);
    
    if (!write_data_to_file (part, filename, TRUE)) {
        GtkWidget *dialog;
        
        dialog = gtk_message_dialog_new (NULL, 0, GTK_MESSAGE_ERROR, GTK_RESPONSE_CLOSE,
                         _("Could not create temporary file '%s': %s"),
                         filename, g_strerror (errno));
        
        /* FIXME: this should be async */
        gtk_dialog_run ((GtkDialog *) dialog);
        gtk_widget_destroy (dialog);
        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);
    g_free (filename);
    
    system (command);
    g_free (command);
}

static void
inline_cb (GtkWidget *widget, gpointer user_data)
{
    MailDisplay *md = g_object_get_data (user_data, "MailDisplay");
    CamelMimePart *part = g_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 = g_object_get_data ((GObject *) 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 = E_POPUP_ITEM (N_("Save Attachment..."), G_CALLBACK (save_cb), 0);
    EPopupMenu view_item = E_POPUP_ITEM (N_("View Inline"), G_CALLBACK (inline_cb), 2);
    EPopupMenu open_item = E_POPUP_ITEM (N_("Open in %s..."), G_CALLBACK (launch_cb), 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. */
    g_signal_stop_emission_by_name (widget, "button_press_event");
    
    part = g_object_get_data((GObject *) widget, "CamelMimePart");
    handler = mail_lookup_handler (g_object_get_data ((GObject *) 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 = g_object_get_data ((GObject *) widget, "MailDisplay");
        
        if (!mail_part_is_displayed_inline (part, md)) {
            if (handler->component) {
                Bonobo_ActivationProperty *prop;
                char *name;
                
                prop = bonobo_server_info_prop_find (handler->component, "name");
                if (!prop) {
                    prop = bonobo_server_info_prop_find (handler->component,
                                         "description");
                }
                if (prop && prop->v._d == Bonobo_ACTIVATION_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_icon (mime_type);
    
    if (icon_name) {
        if (*icon_name == '/') {
            pixbuf = gdk_pixbuf_new_from_file (icon_name, NULL);
            if (pixbuf)
                return pixbuf;
        }
        
        filename = gnome_program_locate_file (NULL, GNOME_FILE_DOMAIN_PIXMAP,
                              icon_name, TRUE, NULL);
        if (!filename) {
            char *fm_icon;
            
            fm_icon = g_strdup_printf ("nautilus/%s", icon_name);
            filename = gnome_program_locate_file (NULL, GNOME_FILE_DOMAIN_PIXMAP,
                                  fm_icon, TRUE, NULL);
            if (!filename) {
                g_free (fm_icon);
                fm_icon = g_strdup_printf ("mc/%s", icon_name);
                filename = gnome_program_locate_file (NULL, GNOME_FILE_DOMAIN_PIXMAP,
                                      fm_icon, TRUE, NULL);
            }
            g_free (fm_icon);
        }
        
        if (filename) {
            pixbuf = gdk_pixbuf_new_from_file (filename, NULL);
            g_free (filename);
        }
    }
    
    if (!pixbuf) {
        filename = gnome_program_locate_file (NULL, GNOME_FILE_DOMAIN_PIXMAP,
                              "gnome-unknown.png", TRUE, NULL);
        if (filename) {
            pixbuf = gdk_pixbuf_new_from_file (filename, NULL);
            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);
    g_object_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);
        
        gtk_image_set_from_pixbuf ((GtkImage *) pbl->pixmap, mini);
        gtk_widget_set_size_request (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, NULL);
            g_object_unref (pbl->loader);
            camel_object_unref (pbl->mstream);
        }
        
        g_signal_handler_disconnect (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 (pbl->mstream);
        
        if (pbl->loader) {
            gdk_pixbuf_loader_close (pbl->loader, NULL);
            g_object_unref (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, NULL);
            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", NULL);
    } 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)
        g_object_unref (pixbuf);
    
    gtk_image_set_from_pixbuf ((GtkImage *) pbl->pixmap, mini);
    
    /* 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);
    
    g_signal_handler_disconnect (pbl->eb, pbl->destroy_id);
    if (pbl->loader) {
        gdk_pixbuf_loader_close (pbl->loader, NULL);
        g_object_unref (pbl->loader);
        camel_object_unref (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 (pbl->mstream);
    
    if (pbl->loader) {
        gdk_pixbuf_loader_close (pbl->loader, NULL);
        g_object_unref (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) {
#warning "what about bonobo_widget_new_subdoc?"
#if 0
        /*
         * 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;
        }
#endif
    }
    
    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 (memstream);
            part = camel_mime_part_new ();
            camel_medium_set_content_object (CAMEL_MEDIUM (part), wrapper);
            camel_object_unref (wrapper);
            camel_mime_part_set_filename (part, name);
        }
    } else {
        camel_object_ref (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, NULL)) {
            return NULL;
        }
        
        save_part (part);
        camel_object_unref (part);
        return NULL;
    }
    
    g_warning ("part not found");
    
    return NULL;
}

static void
drag_data_get_cb (GtkWidget *widget,
          GdkDragContext *drag_context,
          GtkSelectionData *selection_data,
          guint info,
          guint time,
          gpointer user_data)
{
    CamelMimePart *part = user_data;
    const char *filename, *tmpdir;
    char *uri_list;
    
    switch (info) {
    case DND_TARGET_TYPE_TEXT_URI_LIST:
        /* Kludge around Nautilus requesting the same data many times */
        uri_list = g_object_get_data ((GObject *) widget, "uri-list");
        if (uri_list) {
            gtk_selection_data_set (selection_data, selection_data->target, 8,
                        uri_list, strlen (uri_list));
            return;
        }
        
        tmpdir = e_mkdtemp ("drag-n-drop-XXXXXX");
        if (!tmpdir) {
            GtkWidget *dialog;
            
            dialog = gtk_message_dialog_new (NULL, 0, GTK_MESSAGE_ERROR, GTK_RESPONSE_CLOSE,
                             _("Could not create temporary directory: %s"),
                             g_strerror (errno));
            
            /* FIXME: this should be async */
            gtk_dialog_run ((GtkDialog *) dialog);
            gtk_widget_destroy (dialog);
        }
        
        filename = camel_mime_part_get_filename (part);
        /* This is the default filename used for dnd temporary target of attachment */
        if (!filename)
            filename = _("Unknown");
        
        uri_list = g_strdup_printf ("file://%s/%s", tmpdir, filename);
        
        if (!write_data_to_file (part, uri_list + 7, TRUE)) {
            g_free (uri_list);
            return;
        }
        
        gtk_selection_data_set (selection_data, selection_data->target, 8,
                    uri_list, strlen (uri_list));
        
        g_object_set_data_full ((GObject *) widget, "uri-list", uri_list, g_free);      
        break;
    case DND_TARGET_TYPE_PART_MIME_TYPE:
        if (header_content_type_is (part->content_type, "text", "*")) {
                GByteArray *ba;
            
            ba = mail_format_get_data_wrapper_text ((CamelDataWrapper *) part, NULL);
            if (ba) {
                gtk_selection_data_set (selection_data, selection_data->target, 8,
                            ba->data, ba->len);
                g_byte_array_free (ba, TRUE);
            }
        } else {
            CamelDataWrapper *wrapper;
            CamelStreamMem *cstream;
            
            cstream = (CamelStreamMem *) camel_stream_mem_new ();
            wrapper = camel_medium_get_content_object (CAMEL_MEDIUM (part));
            camel_data_wrapper_write_to_stream (wrapper, (CamelStream *)cstream);
            
            gtk_selection_data_set (selection_data, selection_data->target, 8,
                        cstream->buffer->data, cstream->buffer->len);
            
            camel_object_unref (cstream);
        }
        break;
    default:
        g_assert_not_reached ();
    }
}

static void
drag_data_delete_cb (GtkWidget *widget,
             GdkDragContext *drag_context,
             gpointer user_data)
{
    char *uri_list;
    
    uri_list = g_object_get_data ((GObject *) widget, "uri-list");
    if (uri_list) {
        unlink (uri_list + 7);
        g_object_set_data ((GObject *) widget, "uri-list", 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 (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 = gtk_image_new();
    gtk_widget_set_size_request (pbl->pixmap, 24, 24);
    pbl->eb = eb;
    pbl->destroy_id = g_signal_connect (eb, "destroy", G_CALLBACK (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_WIDGET_UNSET_FLAGS (button, GTK_CAN_FOCUS);
    g_object_set_data ((GObject *) button, "MailDisplay", md);
    
    handler = mail_lookup_handler (eb->type);
    if (handler && handler->builtin)
        g_signal_connect (button, "clicked", G_CALLBACK (button_press), part);
    
    /* Drag & Drop */
    drag_types[DND_TARGET_TYPE_PART_MIME_TYPE].target = header_content_type_simple (part->content_type);
    g_strdown (drag_types[DND_TARGET_TYPE_PART_MIME_TYPE].target);
    
    gtk_drag_source_set (button, GDK_BUTTON1_MASK,
                 drag_types, num_drag_types,
                 GDK_ACTION_COPY);
    g_signal_connect (button, "drag-data-get", G_CALLBACK (drag_data_get_cb), part);
    g_signal_connect (button, "drag-data-delete", G_CALLBACK (drag_data_delete_cb), part);
    
    g_free (drag_types[DND_TARGET_TYPE_PART_MIME_TYPE].target);
    drag_types[DND_TARGET_TYPE_PART_MIME_TYPE].target = NULL;
    
    hbox = gtk_hbox_new (FALSE, 2);
    gtk_container_set_border_width (GTK_CONTAINER (hbox), 2);
    
    /* should this be a gtk_arrow? */
    if (handler && mail_part_is_displayed_inline (part, md))
        arrow = gtk_image_new_from_stock (GTK_STOCK_GO_DOWN, GTK_ICON_SIZE_BUTTON);
    else
        arrow = gtk_image_new_from_stock (GTK_STOCK_GO_FORWARD, GTK_ICON_SIZE_BUTTON);
    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_WIDGET_UNSET_FLAGS (popup, GTK_CAN_FOCUS);
    gtk_container_add (GTK_CONTAINER (popup),
               gtk_arrow_new (GTK_ARROW_DOWN,
                      GTK_SHADOW_ETCHED_IN));
    
    g_object_set_data ((GObject *) popup, "MailDisplay", md);
    g_object_set_data ((GObject *) popup, "CamelMimePart", part);
    g_object_set_data_full ((GObject *) popup, "mime_type", g_strdup (eb->type), (GDestroyNotify) g_free);
    
    g_signal_connect (popup, "button_press_event", G_CALLBACK (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);
    
    gtk_container_add (GTK_CONTAINER (eb), mainbox);
    
    return TRUE;
}

static gboolean
do_external_viewer (GtkHTML *html, GtkHTMLEmbedded *eb,
            CamelMimePart *part, MailDisplay *md)
{
    CamelDataWrapper *wrapper;
    Bonobo_ServerInfo *component;
    GtkWidget *embedded;
    Bonobo_PersistStream persist;   
    CORBA_Environment ev;
    GByteArray *ba;
    CamelStreamMem *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;
    
    persist = (Bonobo_PersistStream) Bonobo_Unknown_queryInterface (
        bonobo_widget_get_objref (BONOBO_WIDGET (embedded)),
        "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... */
    cstream = (CamelStreamMem *) camel_stream_mem_new ();
    wrapper = camel_medium_get_content_object (CAMEL_MEDIUM (part));
    camel_data_wrapper_write_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. */
    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 = gtk_image_new ();
    gtk_widget_set_size_request (pbl->pixmap, 24, 24);
    pbl->eb = eb;
    pbl->destroy_id = g_signal_connect (eb, "destroy", G_CALLBACK (embeddable_destroy_cb), pbl);
    
    g_idle_add_full (G_PRIORITY_LOW, (GSourceFunc) pixbuf_gen_idle, pbl, NULL);
    
    button = gtk_button_new ();
    GTK_WIDGET_UNSET_FLAGS (button, GTK_CAN_FOCUS);
    g_object_set_data ((GObject *) button, "MailDisplay", md);
    g_signal_connect (button, "clicked", G_CALLBACK (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;
    
    if (!eb->classid)
        return FALSE;
    
    urls = g_datalist_get_data (md->data, "part_urls");
    if (!urls)
        return FALSE;
    
    if (!strncmp (eb->classid, "popup:", 6) && eb->type) {
        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) && eb->type) {
        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
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;
    GConfClient *gconf;
    GHashTable *urls;
    CamelMedium *medium;
    GByteArray *ba;
    
    gconf = gconf_client_get_default ();
    
    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));
        
        if (md->related)
            g_hash_table_remove (md->related, medium);
        
        data = camel_medium_get_content_object (medium);
        if (!mail_content_loaded (data, md, FALSE, url, html, 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_display_stream_new (html, handle);
            camel_data_wrapper_write_to_stream (data, html_stream);
            camel_object_unref (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 || strncmp (url, "https:", 6) == 0) {
        int http_mode;
        
        http_mode = gconf_client_get_int (gconf, "/apps/evolution/mail/display/load_http_images", NULL);
        if (http_mode == MAIL_CONFIG_HTTP_ALWAYS ||
            g_datalist_get_data (md->data, "load_images")) {
            fetch_remote (md, url, html, handle);
        } else if (http_mode == MAIL_CONFIG_HTTP_SOMETIMES &&
               !g_datalist_get_data (md->data, "checking_from")) {
            const CamelInternetAddress *from;
            const char *name, *addr;
            
            from = camel_mime_message_get_from (md->current_message);
            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_default (addr, ebook_callback, md);
            else
                gtk_html_end (html, handle, GTK_HTML_STREAM_ERROR);
        }
    }
}

/* for processing asynchronous url fetch cancels */
static struct _mail_msg_op fetch_fake_op = {
    NULL, NULL, NULL, NULL,
};

static gboolean
fetch_cancelled (GIOChannel *source, GIOCondition cond, void *user_data)
{
    fetch_cancel ((MailDisplay *) user_data);
    
    return FALSE;
}

static void
fetch_next (MailDisplay *md)
{
    struct _remote_data *rd;
    struct _MailDisplayPrivate *p = md->priv;
    SoupMessage *msg;
    SoupContext *ctx;
    
    /* if we're called and no more work to do, clean up, otherwise, setup */
    if (e_dlist_empty(&p->fetch_active) && e_dlist_empty(&p->fetch_queue)) {
        if (p->fetch_msg) {
            p->fetch_total = 0;
            mail_disable_stop();
            camel_operation_end(p->fetch_msg->cancel);
            camel_operation_unregister(p->fetch_msg->cancel);
            mail_msg_free(p->fetch_msg);
            p->fetch_msg = NULL;
            g_source_remove(p->fetch_cancel_watch);
            g_io_channel_unref(p->fetch_cancel_channel);
        }
    } else {
        if (p->fetch_msg == NULL) {
            p->fetch_total_done = 0;
            p->fetch_msg = mail_msg_new(&fetch_fake_op, NULL, sizeof(*p->fetch_msg));
            camel_operation_register(p->fetch_msg->cancel);
            camel_operation_start(p->fetch_msg->cancel, _("Downloading images"));
            p->fetch_cancel_channel = g_io_channel_unix_new(camel_operation_cancel_fd(p->fetch_msg->cancel));
            p->fetch_cancel_watch = g_io_add_watch(p->fetch_cancel_channel, G_IO_IN, fetch_cancelled, md);
            mail_enable_stop();
        }
    }   

    while (e_dlist_length(&p->fetch_active) < FETCH_MAX_CONNECTIONS
           && (rd = (struct _remote_data *)e_dlist_remhead(&p->fetch_queue))) {

        ctx = soup_context_get(rd->uri);
        rd->msg = msg =  soup_message_new(ctx, SOUP_METHOD_GET);

        if (ctx)
            soup_context_unref(ctx);

        soup_message_set_flags(msg, SOUP_MESSAGE_OVERWRITE_CHUNKS);
        soup_message_add_handler(msg, SOUP_HANDLER_BODY_CHUNK, fetch_data, rd);
        e_dlist_addtail(&p->fetch_active, (EDListNode *)rd);
        soup_message_queue(msg, fetch_done, rd);
    }
}

static void fetch_remote(MailDisplay *md, const char *uri, GtkHTML *html, GtkHTMLStream *stream)
{
    struct _remote_data *rd;
    CamelStream *cstream = NULL;

    if (fetch_cache) {
        cstream = camel_data_cache_get(fetch_cache, FETCH_HTTP_CACHE, uri, NULL);
        if (cstream) {
            char buf[1024];
            ssize_t len;

            /* need to verify header? */

            while (!camel_stream_eos(cstream)) {
                len = camel_stream_read(cstream, buf, 1024);
                if (len > 0) {
                    gtk_html_write(html, stream, buf, len);
                } else if (len < 0) {
                    gtk_html_end(html, stream, GTK_HTML_STREAM_ERROR);
                    camel_object_unref(cstream);
                    return;
                }
            }
            gtk_html_end(html, stream, GTK_HTML_STREAM_OK);
            camel_object_unref(cstream);
            return;
        }
        cstream = camel_data_cache_add(fetch_cache, FETCH_HTTP_CACHE, uri, NULL);
    }

    rd = g_malloc0(sizeof(*rd));
    rd->md = md;        /* dont ref */
    rd->uri = g_strdup(uri);
    rd->html = html;
    g_object_ref(html);
    rd->stream = stream;
    rd->cstream = cstream;

    md->priv->fetch_total++;
    e_dlist_addtail(&md->priv->fetch_queue, (EDListNode *)rd);

    fetch_next(md);
}

static void fetch_data(SoupMessage *req, void *data)
{
    struct _remote_data *rd = data, *wd;
    struct _MailDisplayPrivate *p = rd->md->priv;
    int count;
    double complete;

    /* we could just hook into the header function for this, but i'm lazy today */
    if (rd->total == 0) {
        const char *cl = soup_message_get_header(req->response_headers, "content-length");
        if (cl)
            rd->total = strtoul(cl, 0, 10);
        else
            rd->total = 0;
    }
    rd->length += req->response.length;

    gtk_html_write(rd->html, rd->stream, req->response.body, req->response.length);

    /* copy to cache, clear cache if we get a cache failure */
    if (rd->cstream) {
        if (camel_stream_write(rd->cstream, req->response.body, req->response.length) == -1) {
            camel_data_cache_remove(fetch_cache, FETCH_HTTP_CACHE, rd->uri, NULL);
            camel_object_unref(rd->cstream);
            rd->cstream = NULL;
        }
    }

    /* update based on total active + finished totals */
    complete = 0.0;
    wd = (struct _remote_data *)p->fetch_active.head;
    count = e_dlist_length(&p->fetch_active);
    while (wd->next) {
        if (wd->total)
            complete += (double)wd->length / wd->total / count;
        wd = wd->next;
    }

    d(printf("%s: %f total %f (%d,%d)\n", rd->uri, complete, (p->fetch_total_done + complete ) * 100.0 / p->fetch_total, p->fetch_total, p->fetch_total_done));

    camel_operation_progress(p->fetch_msg->cancel, (p->fetch_total_done + complete ) * 100.0 / p->fetch_total);
}

static void fetch_free(struct _remote_data *rd)
{
    g_object_unref(rd->html);
    if (rd->cstream)
        camel_object_unref(rd->cstream);
    g_free(rd->uri);
    g_free(rd);
}

static void fetch_done(SoupMessage *req, void *data)
{
    struct _remote_data *rd = data;
    MailDisplay *md = rd->md;

    if (SOUP_MESSAGE_IS_ERROR(req)) {
        d(printf("Loading '%s' failed!\n", rd->uri));
        gtk_html_end(rd->html, rd->stream, GTK_HTML_STREAM_ERROR);
        if (fetch_cache)
            camel_data_cache_remove(fetch_cache, FETCH_HTTP_CACHE, rd->uri, NULL);
    } else {
        d(printf("Loading '%s' complete!\n", rd->uri));
        gtk_html_end(rd->html, rd->stream, GTK_HTML_STREAM_OK);
    }

    e_dlist_remove((EDListNode *)rd);
    fetch_free(rd);
    md->priv->fetch_total_done++;

    fetch_next(md);
}

static void fetch_cancel(MailDisplay *md)
{
    struct _remote_data *rd;

    /* first, clean up all the ones we haven't finished yet */
    while ((rd = (struct _remote_data *)e_dlist_remhead(&md->priv->fetch_queue))) {
        gtk_html_end(rd->html, rd->stream, GTK_HTML_STREAM_ERROR);
        if (fetch_cache)
            camel_data_cache_remove(fetch_cache, FETCH_HTTP_CACHE, rd->uri, NULL);
        fetch_free(rd);
    }

    /* cancel the rest, cancellation will free it/etc */
    while (!e_dlist_empty(&md->priv->fetch_active)) {
        rd = (struct _remote_data *)md->priv->fetch_active.head;
        soup_message_cancel(rd->msg);
    }
}

struct _load_content_msg {
    struct _mail_msg msg;
    
    MailDisplay *display;
    GtkHTML *html;
    
    GtkHTMLStream *handle;
    int redisplay_counter;
    char *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->html, m->handle)) {
            g_warning ("This code should not be reached\n");
            return TRUE;
        }
        
        html_stream = mail_display_stream_new (m->html, m->handle);
        camel_data_wrapper_write_to_stream (data, html_stream);
        camel_object_unref (html_stream);
        
        gtk_html_end (m->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);
    
    if (ba) {
        if (ba->len)
            gtk_html_write (m->html, m->handle, ba->data, ba->len);
        gtk_html_end (m->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;

#warning "object_destroy check?"
#if 0
    if (GTK_OBJECT_DESTROYED (m->display))
        return;
#endif
    
    if (m->display->current_message == m->message) {
        if (m->handle) {
            if (m->redisplay_counter == m->display->redisplay_counter) {
                if (!try_part_urls (m) && !try_data_urls (m))
                    gtk_html_end (m->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);
    g_object_unref (m->html);
    g_object_unref (m->display);
    camel_object_unref (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,
                       GtkHTML *html,
                       gconstpointer key,
                       const gchar *url,
                       void (*callback)(MailDisplay *, gpointer),
                       GtkHTMLStream *handle,
                       gpointer data)
{
    struct _load_content_msg *m;
    GHashTable *loading;
    
#if 0
#warning "GTK_OBJECT_DESTROYED"
    if (GTK_OBJECT_DESTROYED (md))
        return;
#endif
    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;
    g_object_ref((m->display));
    m->html = html;
    g_object_ref((html));
    m->handle = handle;
    m->url = g_strdup (url);
    m->redisplay_counter = md->redisplay_counter;
    m->message = md->current_message;
    camel_object_ref (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 char *url,
                       void (*callback)(MailDisplay *, gpointer),
                       GtkHTML *html,
                       GtkHTMLStream *handle,
                       gpointer data)
{
    stream_write_or_redisplay_when_loaded (md, html, key, url, callback, handle, data);
}

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

void
mail_text_write (MailDisplayStream *stream, MailDisplay *md, CamelMimePart *part,
         int idx, gboolean printing, const char *text)
{
    CamelStreamFilter *filtered_stream;
    CamelMimeFilter *html_filter;
    GConfClient *gconf;
    guint32 flags, rgb;
    GdkColor colour;
    char *buf;
    
    gconf = gconf_client_get_default ();
    
    flags = CAMEL_MIME_FILTER_TOHTML_CONVERT_NL | CAMEL_MIME_FILTER_TOHTML_CONVERT_SPACES;
    
    if (!printing)
        flags |= CAMEL_MIME_FILTER_TOHTML_CONVERT_URLS | CAMEL_MIME_FILTER_TOHTML_CONVERT_ADDRESSES;
    
    if (!printing && gconf_client_get_bool (gconf, "/apps/evolution/mail/display/mark_citations", NULL))
        flags |= CAMEL_MIME_FILTER_TOHTML_MARK_CITATION;
    
    buf = gconf_client_get_string (gconf, "/apps/evolution/mail/display/citation_colour", NULL);
    gdk_color_parse (buf ? buf : "#737373", &colour);
    g_free (buf);
    
    rgb = ((colour.red & 0xff00) << 8) | (colour.green & 0xff00) | ((colour.blue & 0xff00) >> 8);
    html_filter = camel_mime_filter_tohtml_new (flags, rgb);
    filtered_stream = camel_stream_filter_new_with_stream ((CamelStream *) stream);
    camel_stream_filter_add (filtered_stream, html_filter);
    camel_object_unref (html_filter);
    
    camel_stream_write ((CamelStream *) stream, "<tt>\n", 5);
    camel_stream_write ((CamelStream *) filtered_stream, text, strlen (text));
    camel_stream_flush ((CamelStream *) filtered_stream);
    camel_stream_write ((CamelStream *) stream, "</tt>\n", 6);
    camel_object_unref (filtered_stream);
    
#if 0
    /* this was the old way of doing it, I don't understand why we need iframes... */
    GByteArray *ba;
    char *xed, *iframe;
    char *btt = "<tt>\n";
    char *ett = "</tt>\n";
    char *htmltext;
    guint32 flags;
    
    flags = CAMEL_MIME_FILTER_TOHTML_CONVERT_NL | CAMEL_MIME_FILTER_TOHTML_CONVERT_SPACES;
    
    if (!printing)
        flags |= CAMEL_MIME_FILTER_TOHTML_CONVERT_URLS | CAMEL_MIME_FILTER_TOHTML_CONVERT_ADDRESSES;
    
    if (!printing && mail_config_get_citation_highlight ())
        flags |= CAMEL_MIME_FILTER_TOHTML_MARK_CITATION;
    
    htmltext = camel_text_to_html (text, flags, mail_config_get_citation_color ());
    
    ba = g_byte_array_new ();
    g_byte_array_append (ba, (const guint8 *) btt, strlen (btt) + 1);
    g_byte_array_append (ba, (const guint8 *) htmltext, strlen (htmltext) + 1);
    g_byte_array_append (ba, (const guint8 *) ett, strlen (ett) + 1);
    g_free (htmltext);
    
    xed = g_strdup_printf ("x-evolution-data:%p-%d", part, idx);
    iframe = g_strdup_printf ("<iframe src=\"%s\" frameborder=0 scrolling=no>could not get %s</iframe>", xed, xed);
    mail_display_add_url (md, "data_urls", xed, ba);
    camel_stream_write ((CamelStream *) stream, iframe, strlen (iframe));
    g_free (iframe);
#endif
}

void
mail_error_printf (MailDisplayStream *stream, const char *format, ...)
{
    /* FIXME: it'd be nice if camel-stream had a vprintf method... */
    char *buf, *htmltext;
    va_list ap;
    
    va_start (ap, format);
    buf = g_strdup_vprintf (format, ap);
    va_end (ap);
    
    htmltext = camel_text_to_html (buf, CAMEL_MIME_FILTER_TOHTML_CONVERT_NL |
                       CAMEL_MIME_FILTER_TOHTML_CONVERT_URLS, 0);
    g_free (buf);
    
    camel_stream_printf ((CamelStream *) stream, "<em><font color=red>");
    camel_stream_write ((CamelStream *) stream, htmltext, strlen (htmltext));
    camel_stream_printf ((CamelStream *) stream, "</font></em>");
    
    g_free (htmltext);
}


#define COLOR_IS_LIGHT(r, g, b)  ((r + g + b) > (128 * 3))

#define HTML_HEADER "<!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"

void
mail_display_render (MailDisplay *md, GtkHTML *html, gboolean reset_scroll)
{
    const char *flag, *completed;
    GtkHTMLStream *html_stream;
    MailDisplayStream *stream;
    
    g_return_if_fail (IS_MAIL_DISPLAY (md));
    g_return_if_fail (GTK_IS_HTML (html));
    
    html_stream = gtk_html_begin (html);
    if (!reset_scroll) {
        /* This is a hack until there's a clean way to do this. */
        GTK_HTML (md->html)->engine->newPage = FALSE;
    }
    
    gtk_html_stream_write (html_stream, HTML_HEADER, sizeof (HTML_HEADER) - 1);
    
    if (md->current_message && md->display_style == MAIL_CONFIG_DISPLAY_SOURCE)
        gtk_html_stream_write (html_stream, "<body>\n", 7);
    else
        gtk_html_stream_write (html_stream, "<body marginwidth=0 marginheight=0>\n", 36);
    
    flag = md->info ? camel_tag_get (&md->info->user_tags, "follow-up") : NULL;
    completed = md->info ? camel_tag_get (&md->info->user_tags, "completed-on") : NULL;
    if ((flag && *flag) && !(completed && *completed)) {
        const char *due_by, *overdue = "";
        char bgcolor[7], fontcolor[7];
        time_t target_date, now;
        GtkStyle *style = NULL;
        char due_date[256];
        struct tm due;
        int offset;
        
        /* my favorite thing to do... muck around with colors so we respect people's stupid themes. */
        /* FIXME: this is also in mail-format.c */
        style = gtk_widget_get_style (GTK_WIDGET (html));
        if (style && !md->printing) {
            int state = GTK_WIDGET_STATE (GTK_WIDGET (html));
            gushort r, g, b;
            
            r = style->base[state].red / 256;
            g = style->base[state].green / 256;
            b = style->base[state].blue / 256;
            
            if (COLOR_IS_LIGHT (r, g, b)) {
                r *= 1.0;
                g *= 0.97;
                b *= 0.75;
            } else {
                r = 255 - (1.0 * (255 - r));
                g = 255 - (0.97 * (255 - g));
                b = 255 - (0.75 * (255 - b));
            }
            
            sprintf (bgcolor, "%.2X%.2X%.2X", r, g, b);
            
            r = style->text[state].red / 256;
            g = style->text[state].green / 256;
            b = style->text[state].blue / 256;
            
            sprintf (fontcolor, "%.2X%.2X%.2X", r, g, b);
        } else {
            strcpy (bgcolor, "EEEEEE");
            strcpy (fontcolor, "000000");
        }
        
        due_by = camel_tag_get (&md->info->user_tags, "due-by");
        if (due_by && *due_by) {
            target_date = header_decode_date (due_by, &offset);
            now = time (NULL);
            if (now >= target_date)
                overdue = _("Overdue:");
            
            localtime_r (&target_date, &due);
            
            e_strftime_fix_am_pm (due_date, sizeof (due_date), _("by %B %d, %Y, %l:%M %P"), &due);
        } else {
            due_date[0] = '\0';
        }
        
        gtk_html_stream_printf (html_stream, "<font color=\"#%s\">"
                    "<table width=\"100%%\" cellpadding=0 cellspacing=0><tr><td colspan=3 height=10></td></tr>"
                    "<tr><td width=10></td><td>"
                    "<table cellspacing=1 cellpadding=1 bgcolor=\"#000000\" width=\"100%%\"><tr><td>"
                    "<table cellspacing=0 bgcolor=\"#%s\" cellpadding=2 cellspacing=2 width=\"100%%\">"
                    "<tr><td align=\"left\" width=20><img src=\"%s\" align=\"middle\"></td>"
                    "<td>%s%s%s%s %s</td></table></td></tr></table>"
                    "</td><td width=10></td></tr></table></font>", fontcolor, bgcolor,
                    mail_display_get_url_for_icon (md, EVOLUTION_IMAGES "/flag-for-followup-16.png"),
                    overdue ? "<b>" : "", overdue, overdue ? "</b>&nbsp;" : "",
                    flag, due_date);
    }
    
    if (md->current_message) {
        stream = (MailDisplayStream *) mail_display_stream_new (html, html_stream);
        
        if (md->display_style == MAIL_CONFIG_DISPLAY_SOURCE)
            mail_format_raw_message (md->current_message, md, stream);
        else
            mail_format_mime_message (md->current_message, md, stream);
        
        camel_object_unref (stream);
    }
    
    gtk_html_stream_write (html_stream, "</body></html>\n", 15);
    gtk_html_end (html, html_stream, GTK_HTML_STREAM_OK);
}

/**
 * mail_display_redisplay:
 * @mail_display: the mail display object
 * @reset_scroll: specifies whether or not to reset current scroll
 *
 * Force a redraw of the message display.
 **/
void
mail_display_redisplay (MailDisplay *md, gboolean reset_scroll)
{
#if 0
#warning "GTK_OBJECT_DESTROYED"
    if (GTK_OBJECT_DESTROYED (md))
        return;
#endif
    fetch_cancel(md);
    
    md->last_active = NULL;
    md->redisplay_counter++;
    /* printf ("md %p redisplay %d\n", md, md->redisplay_counter); */
    
    mail_display_render (md, md->html, reset_scroll);
}


/**
 * mail_display_set_message:
 * @mail_display: the mail display object
 * @medium: the input camel medium, or %NULL
 * @folder: CamelFolder
 * @info: message info
 *
 * Makes the mail_display object show the contents of the medium
 * param.
 **/
void 
mail_display_set_message (MailDisplay *md, CamelMedium *medium, CamelFolder *folder, CamelMessageInfo *info)
{
    /* 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) {
        fetch_cancel (md);
        camel_object_unref (md->current_message);
        g_datalist_clear (md->data);
    }
    
    if (medium) {
        camel_object_ref (medium);
        md->current_message = (CamelMimeMessage *) medium;
    } else
        md->current_message = NULL;
    
    if (md->folder && md->info) {
        camel_folder_free_message_info (md->folder, md->info);
        camel_object_unref (md->folder);
    }
    
    if (folder && info) {
        md->info = info;
        md->folder = folder;
        camel_object_ref (folder);
        camel_folder_ref_message_info (folder, info);
    } else {
        md->info = NULL;
        md->folder = NULL;
    }
    
    g_datalist_init (md->data);
    mail_display_redisplay (md, TRUE);
}

/**
 * mail_display_set_charset:
 * @mail_display: the mail display object
 * @charset: charset 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 (GObject *object)
{
    MailDisplay *mail_display = MAIL_DISPLAY (object);
    GConfClient *gconf;
    int style;
    
    mail_display->scroll            = NULL;
    mail_display->html              = NULL;
    mail_display->redisplay_counter = 0;
    mail_display->last_active       = NULL;
    mail_display->idle_id           = 0;
    mail_display->selection         = NULL;
    mail_display->charset           = NULL;
    mail_display->current_message   = NULL;
    mail_display->folder            = NULL;
    mail_display->info              = NULL;
    mail_display->data              = NULL;
    
    mail_display->invisible         = gtk_invisible_new ();
    g_object_ref (mail_display->invisible);
    gtk_object_sink ((GtkObject *) mail_display->invisible);
    
    gconf = gconf_client_get_default ();
    style = gconf_client_get_int (gconf, "/apps/evolution/mail/format/message_display_style", NULL);
    mail_display->display_style     = style;
    
    mail_display->printing          = FALSE;
    
    mail_display->priv = g_malloc0(sizeof(*mail_display->priv));
    e_dlist_init(&mail_display->priv->fetch_active);
    e_dlist_init(&mail_display->priv->fetch_queue);
}

static void
mail_display_destroy (GtkObject *object)
{
    MailDisplay *mail_display = MAIL_DISPLAY (object);
    
    if (mail_display->html) {
        g_object_unref (mail_display->html);
        mail_display->html = NULL;
    }
    
    if (mail_display->current_message) {
        camel_object_unref (mail_display->current_message);
        g_datalist_clear (mail_display->data);
        fetch_cancel(mail_display);
        mail_display->current_message = NULL;
    }
    
    g_free (mail_display->charset);
    mail_display->charset = NULL;
    g_free (mail_display->selection);
    mail_display->selection = NULL;
    
    if (mail_display->folder) {
        if (mail_display->info)
            camel_folder_free_message_info (mail_display->folder, mail_display->info);
        camel_object_unref (mail_display->folder);
        mail_display->folder = NULL;
    }
    
    g_free (mail_display->data);
    mail_display->data = NULL;
    
    if (mail_display->idle_id) {
        gtk_timeout_remove (mail_display->idle_id);
        mail_display->idle_id = 0;
    }
    
    if (mail_display->invisible) {
        g_object_unref (mail_display->invisible);
        mail_display->invisible = NULL;
    }
    
    g_free (mail_display->priv);
    mail_display->priv = NULL;
    
    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;
    
    if (mail_display_parent_class == NULL) {
        /* blah, this is an unecessary dependency ... */
        extern char *evolution_dir;
        char *path;
        
        path = g_alloca (strlen (evolution_dir) + 16);
        sprintf (path, "%s/cache", evolution_dir);
        
        /* cache expiry - 2 hour access, 1 day max */
        fetch_cache = camel_data_cache_new(path, 0, NULL);
        camel_data_cache_set_expire_age(fetch_cache, 24*60*60);
        camel_data_cache_set_expire_access(fetch_cache, 2*60*60);
        
        mail_display_parent_class = g_type_class_ref (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)
{
    if (!mail_display->html->pointer_url)
        return;
    
    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 = g_object_get_data ((GObject *) 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 [] = {
    E_POPUP_ITEM (N_("Open Link in Browser"), G_CALLBACK (link_open_in_browser),   MASK_URL),
    E_POPUP_ITEM (N_("Copy Link Location"), G_CALLBACK (link_copy_location),  MASK_URL),
#if 0
    E_POPUP_ITEM (N_("Save Link as (FIXME)"), G_CALLBACK (link_save_as),  MASK_URL),
#endif
    E_POPUP_ITEM (N_("Save Image as..."), G_CALLBACK (image_save_as), 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_Listener listener;
    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,
                                NULL);
        CORBA_Object_release (pop->listener, NULL);
        g_free (pop);
    }
}

static void
popup_window_destroy_cb (PopupInfo *pop, GObject *deadbeef)
{
    the_popup = NULL;
    
    popup_info_free (pop);
}

static int
popup_timeout_cb (gpointer user_data)
{
    PopupInfo *pop = (PopupInfo *) user_data;
    
    pop->destroy_timeout = 0;
    gtk_widget_destroy (pop->win);
    
    return 0;
}

static int
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 int
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)
{
    int 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);
    
    g_signal_connect (pop->win, "enter_notify_event", G_CALLBACK (popup_enter_cb), pop);
    g_signal_connect (pop->win, "leave_notify_event", G_CALLBACK (popup_leave_cb), pop);
    g_signal_connect_after (pop->win, "realize", G_CALLBACK (popup_realize_cb), pop);
    g_signal_connect (pop->win, "size_allocate", G_CALLBACK (popup_size_allocate_cb), pop);
    
    g_object_weak_ref ((GObject *) pop->win, (GWeakNotify) popup_window_destroy_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 char *url, *src;
                
                url = html_object_get_url (point->object);
                src = html_object_get_src (point->object);
                
                if (url && !strncasecmp (url, "mailto:", 7)) {
                    PopupInfo *pop;
                    char *url_decoded;
                    
                    url_decoded = gtk_html_get_url_object_relative (GTK_HTML (widget),
                                            point->object,
                                            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", TC_CORBA_string, url_decoded+7,
                                    NULL);
                    g_free (url_decoded);
                    
                    pop = make_popup_window (popup_thing);
                    
                    pop->listener = bonobo_event_source_client_add_listener_full(
                        bonobo_widget_get_objref (BONOBO_WIDGET (popup_thing)),
                        g_cclosure_new (G_CALLBACK (listener_cb), pop, NULL),
                        NULL, NULL);
                } else if (url || src) {
                        int hide_mask = 0;
                    
                    if (!url)
                        hide_mask |= MASK_URL;
                    
                    if (!src)
                        hide_mask |= MASK_SRC;
                    
                    g_free (g_object_get_data ((GObject *) mail_display, "current_src_uri"));
                    g_object_set_data ((GObject *) mail_display, "current_src_uri", 
                              gtk_html_get_url_object_relative (GTK_HTML (widget),
                                                point->object,
                                                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 int
html_enter_notify_event (GtkWidget *widget, GdkEventCrossing *event, MailDisplay *mail_display)
{
    update_active (widget, event->x, event->y, mail_display);
    
    return TRUE;
}

static int
html_motion_notify_event (GtkWidget *widget, GdkEventMotion *event, MailDisplay *mail_display)
{
    int 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)
{
    g_signal_connect (iframe, "button_press_event",
              G_CALLBACK (html_button_press_event), mail_display);
    g_signal_connect (iframe, "motion_notify_event",
              G_CALLBACK (html_motion_notify_event), mail_display);
    g_signal_connect (iframe, "enter_notify_event",
              G_CALLBACK (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, NULL);
    
    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)
        g_object_set_data ((GObject *) 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 = g_object_get_data ((GObject *) 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;
    }
    
    g_object_unref (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 = g_object_new (mail_display_get_type (), NULL);
    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 = gtk_scrolled_window_new (NULL, NULL);
    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scroll), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
    gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scroll), GTK_SHADOW_IN);
    gtk_box_pack_start_defaults (GTK_BOX (mail_display), scroll);
    gtk_widget_show (scroll);
    
    html = gtk_html_new ();
    tok = e_searching_tokenizer_new ();
    html_engine_set_tokenizer (GTK_HTML (html)->engine, tok);
    g_object_unref (tok);
    
    mail_display_initialize_gtkhtml (mail_display, GTK_HTML (html));
    
    gtk_container_add (GTK_CONTAINER (scroll), html);
    gtk_widget_show (GTK_WIDGET (html));
    
    g_signal_connect (mail_display->invisible, "selection_get",
              G_CALLBACK (invisible_selection_get_callback), mail_display);
    g_signal_connect (mail_display->invisible, "selection_clear_event",
              G_CALLBACK (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 = GTK_SCROLLED_WINDOW (scroll);
    mail_display->html = GTK_HTML (html);
    g_object_ref (mail_display->html);
    mail_display->last_active = NULL;
    mail_display->data = g_new0 (GData *, 1);
    g_datalist_init (mail_display->data);
    
    return GTK_WIDGET (mail_display);
}

void
mail_display_initialize_gtkhtml (MailDisplay *mail_display, GtkHTML *html)
{
    gtk_html_set_default_content_type (GTK_HTML (html), "text/html; charset=utf-8");
    
    gtk_html_set_editable (GTK_HTML (html), FALSE);
    
    g_signal_connect (html, "url_requested",
              G_CALLBACK (on_url_requested),
              mail_display);
    g_signal_connect (html, "object_requested",
              G_CALLBACK (on_object_requested),
              mail_display);
    g_signal_connect (html, "link_clicked",
              G_CALLBACK (on_link_clicked),
              mail_display);
    g_signal_connect (html, "button_press_event",
              G_CALLBACK (html_button_press_event), mail_display);
    g_signal_connect (html, "motion_notify_event",
              G_CALLBACK (html_motion_notify_event), mail_display);
    g_signal_connect (html, "enter_notify_event",
              G_CALLBACK (html_enter_notify_event), mail_display);
    g_signal_connect (html, "iframe_created",
              G_CALLBACK (html_iframe_created), mail_display);
    g_signal_connect (html, "on_url",
              G_CALLBACK (html_on_url), mail_display);
}

static void
free_url (gpointer key, gpointer value, gpointer data)
{
    g_free (key);
    if (data)
        g_byte_array_free (value, TRUE);
}

static void
free_data_urls (gpointer urls)
{
    g_hash_table_foreach (urls, free_url, GINT_TO_POINTER (1));
    g_hash_table_destroy (urls);
}

char *
mail_display_add_url (MailDisplay *md, const char *kind, char *url, gpointer data)
{
    GHashTable *urls;
    gpointer old_key, old_value;
    
    urls = g_datalist_get_data (md->data, kind);
    if (!urls) {
        urls =  g_hash_table_new (g_str_hash, g_str_equal);
        g_datalist_set_data_full (md->data, "data_urls", urls,
                      free_data_urls);
    }
    
    if (g_hash_table_lookup_extended (urls, url, &old_key, &old_value)) {
        g_free (url);
        url = old_key;
    }
    
    g_hash_table_insert (urls, url, data);
    
    return url;
}

const char *
mail_display_get_url_for_icon (MailDisplay *md, const char *icon_name)
{
    char *icon_path, buf[1024], *url;
    int fd, nread;
    GByteArray *ba;
    
    /* FIXME: cache */
    
    if (*icon_name == '/')
        icon_path = g_strdup (icon_name);
    else {
        icon_path = gnome_program_locate_file (NULL, GNOME_FILE_DOMAIN_PIXMAP,
                               icon_name, TRUE, NULL);
        if (!icon_path)
            return "file:///dev/null";
    }
    
    fd = open (icon_path, O_RDONLY);
    g_free (icon_path);
    if (fd == -1)
        return "file:///dev/null";
    
    ba = g_byte_array_new ();
    while (1) {
        nread = read (fd, buf, sizeof (buf));
        if (nread < 1)
            break;
        g_byte_array_append (ba, buf, nread);
    }
    close (fd);
    
    url = g_strdup_printf ("x-evolution-data:%p", ba);
    
    return mail_display_add_url (md, "data_urls", url, ba);
}


struct _location_url_stack {
    struct _location_url_stack *parent;
    CamelURL *url;
};

void
mail_display_push_content_location (MailDisplay *md, const char *location)
{
    struct _location_url_stack *node;
    CamelURL *url;
    
    url = camel_url_new (location, NULL);
    node = g_new (struct _location_url_stack, 1);
    node->parent = md->urls;
    node->url = url;
    md->urls = node;
}

CamelURL *
mail_display_get_content_location (MailDisplay *md)
{
    return md->urls ? md->urls->url : NULL;
}

void
mail_display_pop_content_location (MailDisplay *md)
{
    struct _location_url_stack *node;
    
    if (!md->urls) {
        g_warning ("content-location stack underflow!");
        return;
    }
    
    node = md->urls;
    md->urls = node->parent;
    
    if (node->url)
        camel_url_free (node->url);
    
    g_free (node);
}

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