path: root/composer/e-msg-composer-attachment-bar.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/*
 *  Authors: Ettore Perazzoli <ettore@ximian.com>
 *           Jeffrey Stedfast <fejj@ximian.com>
 *
 *  Copyright 1999-2002 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 <gtk/gtk.h>
#include <glade/glade.h>
#include <gconf/gconf.h>
#include <gconf/gconf-client.h>
#include <gdk/gdkkeysyms.h>
#include <libgnome/gnome-util.h>
#include <libgnomeui/gnome-app.h>
#include <libgnomeui/gnome-app-helper.h>
#include <libgnomeui/gnome-popup-menu.h>
#include <libgnomevfs/gnome-vfs-mime-handlers.h>

#include "e-msg-composer.h"
#include "e-msg-composer-select-file.h"
#include "e-msg-composer-attachment.h"
#include "e-msg-composer-attachment-bar.h"

#include <gal/util/e-iconv.h>

#include <camel/camel-data-wrapper.h>
#include <camel/camel-stream-fs.h>
#include <camel/camel-stream-null.h>
#include <camel/camel-stream-mem.h>
#include <camel/camel-stream-filter.h>
#include <camel/camel-mime-filter-bestenc.h>
#include <camel/camel-mime-part.h>

#include "e-util/e-gui-utils.h"
#include "e-util/e-icon-factory.h"
#include "widgets/misc/e-error.h"

#define ICON_WIDTH 64
#define ICON_SEPARATORS " /-_"
#define ICON_SPACING 2
#define ICON_ROW_SPACING ICON_SPACING
#define ICON_COL_SPACING ICON_SPACING
#define ICON_BORDER 2
#define ICON_TEXT_SPACING 2


static GnomeIconListClass *parent_class = NULL;

struct _EMsgComposerAttachmentBarPrivate {
    GList *attachments;
    guint num_attachments;

    GtkWidget *context_menu;
    GtkWidget *icon_context_menu;
};


enum {
    CHANGED,
    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = { 0 };


static void update (EMsgComposerAttachmentBar *bar);


static char *
size_to_string (gulong size)
{
    char *size_string;
    
    /* FIXME: The following should probably go into a separate module, as
           we might have to do the same thing in other places as well.  Also,
       I am not sure this will be OK for all the languages.  */
    
    if (size < 1e3L) {
        size_string = NULL;
    } else {
        gdouble displayed_size;
        
        if (size < 1e6L) {
            displayed_size = (gdouble) size / 1.0e3;
            size_string = g_strdup_printf (_("%.0fK"), displayed_size);
        } else if (size < 1e9L) {
            displayed_size = (gdouble) size / 1.0e6;
            size_string = g_strdup_printf (_("%.0fM"), displayed_size);
        } else {
            displayed_size = (gdouble) size / 1.0e9;
            size_string = g_strdup_printf (_("%.0fG"), displayed_size);
        }
    }
    
    return size_string;
}

/* Attachment handling functions.  */

static void
free_attachment_list (EMsgComposerAttachmentBar *bar)
{
    EMsgComposerAttachmentBarPrivate *priv;
    GList *p;
    
    priv = bar->priv;
    
    for (p = priv->attachments; p != NULL; p = p->next)
        g_object_unref (p->data);
    
    priv->attachments = NULL;
}

static void
attachment_changed_cb (EMsgComposerAttachment *attachment,
               gpointer data)
{
    update (E_MSG_COMPOSER_ATTACHMENT_BAR (data));
}

static void
add_common (EMsgComposerAttachmentBar *bar,
        EMsgComposerAttachment *attachment)
{
    g_return_if_fail (attachment != NULL);
    
    g_signal_connect (attachment, "changed",
              G_CALLBACK (attachment_changed_cb),
              bar);
    
    bar->priv->attachments = g_list_append (bar->priv->attachments,
                        attachment);
    bar->priv->num_attachments++;
    
    update (bar);
    
    g_signal_emit (bar, signals[CHANGED], 0);
}

static void
add_from_mime_part (EMsgComposerAttachmentBar *bar,
            CamelMimePart *part)
{
    add_common (bar, e_msg_composer_attachment_new_from_mime_part (part));
}

static void
add_from_file (EMsgComposerAttachmentBar *bar,
           const char *file_name,
           const char *disposition)
{
    EMsgComposerAttachment *attachment;
    CamelException ex;
    
    camel_exception_init (&ex);
    attachment = e_msg_composer_attachment_new (file_name, disposition, &ex);
    if (attachment) {
        add_common (bar, attachment);
    } else {
        e_error_run((GtkWindow *)gtk_widget_get_toplevel((GtkWidget *)bar), "mail-composer:no-attach",
                file_name, camel_exception_get_description(&ex), NULL);
        camel_exception_clear (&ex);
    }
}

static void
remove_attachment (EMsgComposerAttachmentBar *bar,
           EMsgComposerAttachment *attachment)
{
    g_return_if_fail (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (bar));
    g_return_if_fail (g_list_find (bar->priv->attachments, attachment) != NULL);

    bar->priv->attachments = g_list_remove (bar->priv->attachments,
                        attachment);
    bar->priv->num_attachments--;
    if (attachment->editor_gui != NULL) {
        GtkWidget *dialog = glade_xml_get_widget (attachment->editor_gui, "dialog");
        g_signal_emit_by_name (dialog, "response", GTK_RESPONSE_CLOSE);
    }
    
    g_object_unref(attachment);
    
    g_signal_emit (bar, signals[CHANGED], 0);
}


/* Icon list contents handling.  */

static void
update (EMsgComposerAttachmentBar *bar)
{
    EMsgComposerAttachmentBarPrivate *priv;
    GnomeIconList *icon_list;
    GList *p;
    
    priv = bar->priv;
    icon_list = GNOME_ICON_LIST (bar);
    
    gnome_icon_list_freeze (icon_list);
    
    gnome_icon_list_clear (icon_list);
    
    /* FIXME could be faster, but we don't care.  */
    for (p = priv->attachments; p != NULL; p = p->next) {
        EMsgComposerAttachment *attachment;
        CamelContentType *content_type;
        char *size_string, *label;
        GdkPixbuf *pixbuf;
        const char *desc;
        
        attachment = p->data;
        content_type = camel_mime_part_get_content_type (attachment->body);
        /* Get the image out of the attachment 
           and create a thumbnail for it */
        pixbuf = attachment->pixbuf_cache;
        if (pixbuf) {
            g_object_ref(pixbuf);
        } else if (camel_content_type_is(content_type, "image", "*")) {
            CamelDataWrapper *wrapper;
            CamelStreamMem *mstream;
            GdkPixbufLoader *loader;
            gboolean error = TRUE;
            
            wrapper = camel_medium_get_content_object (CAMEL_MEDIUM (attachment->body));
            mstream = (CamelStreamMem *) camel_stream_mem_new ();
            
            camel_data_wrapper_decode_to_stream (wrapper, (CamelStream *) mstream);
            
            /* Stream image into pixbuf loader */
            loader = gdk_pixbuf_loader_new ();
            error = !gdk_pixbuf_loader_write (loader, mstream->buffer->data, mstream->buffer->len, NULL);
            gdk_pixbuf_loader_close (loader, NULL);
            
            if (!error) {
                int ratio, width, height;
                
                /* Shrink pixbuf */
                pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
                width = gdk_pixbuf_get_width (pixbuf);
                height = gdk_pixbuf_get_height (pixbuf);
                if (width >= height) {
                    if (width > 48) {
                        ratio = width / 48;
                        width = 48;
                        height = height / ratio;
                    }
                } else {
                    if (height > 48) {
                        ratio = height / 48;
                        height = 48;
                        width = width / ratio;
                    }
                }
                
                attachment->pixbuf_cache = gdk_pixbuf_scale_simple 
                    (pixbuf,
                     width,
                     height,
                     GDK_INTERP_BILINEAR);
                pixbuf = attachment->pixbuf_cache;
                g_object_ref(pixbuf);
            } else {
                pixbuf = NULL;
                g_warning ("GdkPixbufLoader Error");
            }
            
            /* Destroy everything */
            g_object_unref (loader);
            camel_object_unref (mstream);
        }
        
        desc = camel_mime_part_get_description (attachment->body);
        if (!desc || *desc == '\0')
            desc = camel_mime_part_get_filename (attachment->body);
        
        if (!desc)
            desc = _("attachment");
        
        if (attachment->size
            && (size_string = size_to_string (attachment->size))) {
            label = g_strdup_printf ("%s (%s)", desc, size_string);
            g_free (size_string);
        } else
            label = g_strdup (desc);
        
        if (pixbuf == NULL) {
            char *mime_type;
            
            mime_type = camel_content_type_simple (content_type);
            pixbuf = e_icon_for_mime_type (mime_type, 48);
            if (pixbuf == NULL) {
                g_warning("cannot find icon for mime type %s (installation problem?)", mime_type);
                /* stock_attach would be better, but its fugly scaled up */
                pixbuf = e_icon_factory_get_icon("stock_unknown", E_ICON_SIZE_DIALOG);
            }
            g_free (mime_type);
        }

        if (pixbuf) {
            gnome_icon_list_append_pixbuf (icon_list, pixbuf, NULL, label);
            g_object_unref(pixbuf);
        }
        
        g_free (label);
    }
    
    gnome_icon_list_thaw (icon_list);
}

static void
remove_selected (EMsgComposerAttachmentBar *bar)
{
    GnomeIconList *icon_list;
    EMsgComposerAttachment *attachment;
    GList *attachment_list, *p;
    int num = 0, left, dlen;
    
    icon_list = GNOME_ICON_LIST (bar);
    
    /* Weee!  I am especially proud of this piece of cheesy code: it is
           truly awful.  But unless one attaches a huge number of files, it
           will not be as greedy as intended.  FIXME of course.  */
    
    attachment_list = NULL;
    p = gnome_icon_list_get_selection (icon_list);
    dlen = g_list_length (p);
    for ( ; p != NULL; p = p->next) {
        num = GPOINTER_TO_INT (p->data);
        attachment = E_MSG_COMPOSER_ATTACHMENT (g_list_nth_data (bar->priv->attachments, num));

        /* We need to check if there are duplicated index in the return list of 
           gnome_icon_list_get_selection() because of gnome bugzilla bug #122356.
           FIXME in the future. */

        if (g_list_find (attachment_list, attachment) == NULL) {
            attachment_list = g_list_prepend (attachment_list, attachment);
        }
    }
    
    for (p = attachment_list; p != NULL; p = p->next)
        remove_attachment (bar, E_MSG_COMPOSER_ATTACHMENT (p->data));
    
    g_list_free (attachment_list);
    
    update (bar);
    
    left = gnome_icon_list_get_num_icons (icon_list);
    num = num - dlen + 1;
    if (left > 0)
        gnome_icon_list_focus_icon (icon_list, left > num ? num : left - 1);
}

static void
edit_selected (EMsgComposerAttachmentBar *bar)
{
    GnomeIconList *icon_list;
    EMsgComposerAttachment *attachment;
    GList *selection;
    int num;
    
    icon_list = GNOME_ICON_LIST (bar);
    
    selection = gnome_icon_list_get_selection (icon_list);
    num = GPOINTER_TO_INT (selection->data);
    attachment = g_list_nth (bar->priv->attachments, num)->data;
    
    e_msg_composer_attachment_edit (attachment, GTK_WIDGET (bar));
}


/* "Attach" dialog.  */

static void
add_from_user (EMsgComposerAttachmentBar *bar)
{
    EMsgComposer *composer;
    GPtrArray *file_list;
    gboolean is_inline = FALSE;
    int i;
    
    composer = E_MSG_COMPOSER (gtk_widget_get_toplevel (GTK_WIDGET (bar)));
    
    file_list = e_msg_composer_select_file_attachments (composer, &is_inline);
    if (!file_list)
        return;
    
    for (i = 0; i < file_list->len; i++) {
        add_from_file (bar, file_list->pdata[i], is_inline ? "inline" : "attachment");
        g_free (file_list->pdata[i]);
    }
    
    g_ptr_array_free (file_list, TRUE);
}


/* Callbacks.  */

static void
add_cb (GtkWidget *widget, gpointer data, GtkWidget *for_widget)
{
    g_return_if_fail (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (data));
    
    add_from_user (E_MSG_COMPOSER_ATTACHMENT_BAR (data));
}

static void
properties_cb (GtkWidget *widget, gpointer data, GtkWidget *for_widget)
{
    EMsgComposerAttachmentBar *bar;
    
    g_return_if_fail (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (data));
    
    bar = E_MSG_COMPOSER_ATTACHMENT_BAR (data);
    edit_selected (data);
}

static void
remove_cb (GtkWidget *widget, gpointer data, GtkWidget *for_widget)
{
    EMsgComposerAttachmentBar *bar;
    
    g_return_if_fail (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (data));
    
    bar = E_MSG_COMPOSER_ATTACHMENT_BAR (data);
    remove_selected (bar);
}


/* Popup menu handling.  */

static GnomeUIInfo icon_context_menu_info[] = {
    GNOMEUIINFO_ITEM_STOCK (N_("_Remove"),
                N_("Remove selected items from the attachment list"),
                remove_cb,
                GTK_STOCK_REMOVE),
    GNOMEUIINFO_MENU_PROPERTIES_ITEM (properties_cb, NULL),
    GNOMEUIINFO_END
};

#define ICON_CONTEXT_MENU_PROPERTIES (1)

static GtkWidget *
get_icon_context_menu (EMsgComposerAttachmentBar *bar)
{
    EMsgComposerAttachmentBarPrivate *priv;
    
    priv = bar->priv;
    if (priv->icon_context_menu == NULL)
        priv->icon_context_menu = gnome_popup_menu_new (icon_context_menu_info);
    
    return priv->icon_context_menu;
}

static void
popup_icon_context_menu (EMsgComposerAttachmentBar *bar,
             gint num,
             GdkEventButton *event)
{
    GtkWidget *menu;
    GnomeIconList *icon_list;
    GList *selection;

    menu = get_icon_context_menu (bar);
    icon_list = GNOME_ICON_LIST (bar);
    selection = gnome_icon_list_get_selection (icon_list);

    gtk_widget_set_sensitive (icon_context_menu_info[ICON_CONTEXT_MENU_PROPERTIES].widget, g_list_length (selection) == 1);

    gnome_popup_menu_do_popup (menu, NULL, NULL, event, bar, NULL);
}

static GnomeUIInfo context_menu_info[] = {
    GNOMEUIINFO_ITEM (N_("Add attachment..."),
              N_("Attach a file to the message"),
              add_cb, NULL),
    GNOMEUIINFO_END
};

static GtkWidget *
get_context_menu (EMsgComposerAttachmentBar *bar)
{
    EMsgComposerAttachmentBarPrivate *priv;
    
    priv = bar->priv;
    if (priv->context_menu == NULL)
        priv->context_menu = gnome_popup_menu_new (context_menu_info);
    
    return priv->context_menu;
}

static void
popup_context_menu (EMsgComposerAttachmentBar *bar,
            GdkEventButton *event)
{
    GtkWidget *menu;
    
    menu = get_context_menu (bar);
    gnome_popup_menu_do_popup (menu, NULL, NULL, event, bar, NULL);
}


/* GtkObject methods.  */

static void
destroy (GtkObject *object)
{
    EMsgComposerAttachmentBar *bar;
    
    bar = E_MSG_COMPOSER_ATTACHMENT_BAR (object);
    
    if (bar->priv) {
        free_attachment_list (bar);
        g_free (bar->priv);
        bar->priv = NULL;
    }
    
    if (GTK_OBJECT_CLASS (parent_class)->destroy != NULL)
        (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}


/* GtkWidget methods.  */


static void
popup_menu_placement_callback (GtkMenu *menu, int *x, int *y, gboolean *push_in, gpointer user_data)
{
    EMsgComposerAttachmentBar *bar;
    GnomeIconList *icon_list;
    GList *selection;
    GnomeCanvasPixbuf *image;
    
    bar = E_MSG_COMPOSER_ATTACHMENT_BAR (user_data);
    icon_list = GNOME_ICON_LIST (user_data);
    
    gdk_window_get_origin (((GtkWidget*) bar)->window, x, y);
    
    selection = gnome_icon_list_get_selection (icon_list);
    if (selection == NULL)
        return;
    
    image = gnome_icon_list_get_icon_pixbuf_item (icon_list, (gint)selection->data);
    if (image == NULL)
        return;
    
    /* Put menu to the center of icon. */
    *x += (int)(image->item.x1 + image->item.x2) / 2;
    *y += (int)(image->item.y1 + image->item.y2) / 2;
}

static gboolean 
popup_menu_event (GtkWidget *widget)
{
    EMsgComposerAttachmentBar *bar = E_MSG_COMPOSER_ATTACHMENT_BAR (widget);
    GnomeIconList *icon_list = GNOME_ICON_LIST (widget);
    GList *selection = gnome_icon_list_get_selection (icon_list);
    GtkWidget *menu;
    
    if (selection == NULL)
        menu = get_context_menu (bar);
    else
        menu = get_icon_context_menu (bar);
    
    gnome_popup_menu_do_popup (menu, popup_menu_placement_callback, 
                   widget, NULL, widget, NULL);
    
    return TRUE;
}


static int
button_press_event (GtkWidget *widget,
            GdkEventButton *event)
{
    EMsgComposerAttachmentBar *bar;
    GnomeIconList *icon_list;
    int icon_number;
    
    bar = E_MSG_COMPOSER_ATTACHMENT_BAR (widget);
    icon_list = GNOME_ICON_LIST (widget);
    
    if (event->button != 3)
        return GTK_WIDGET_CLASS (parent_class)->button_press_event (widget, event);
    
    icon_number = gnome_icon_list_get_icon_at (icon_list, event->x, event->y);
    
    if (icon_number >= 0) {
        gnome_icon_list_select_icon (icon_list, icon_number);
        popup_icon_context_menu (bar, icon_number, event);
    } else {
        popup_context_menu (bar, event);
    }
    
    return TRUE;
}

static gint
key_press_event (GtkWidget *widget, GdkEventKey *event)
{
        EMsgComposerAttachmentBar *bar;
        GnomeIconList *icon_list;
    
        bar = E_MSG_COMPOSER_ATTACHMENT_BAR (widget);
        icon_list = GNOME_ICON_LIST (bar);                                                                                 
                                                                                
        if (event->keyval == GDK_Delete) {
                remove_selected (bar);
                return TRUE;
        }
                                                                                
        return GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event);
}


/* Initialization.  */

static void
class_init (EMsgComposerAttachmentBarClass *klass)
{
    GtkObjectClass *object_class;
    GtkWidgetClass *widget_class;
    GnomeIconListClass *icon_list_class;
    
    object_class = GTK_OBJECT_CLASS (klass);
    widget_class = GTK_WIDGET_CLASS (klass);
    icon_list_class = GNOME_ICON_LIST_CLASS (klass);
    
    parent_class = g_type_class_ref (gnome_icon_list_get_type ());
    
    object_class->destroy = destroy;
    
    widget_class->button_press_event = button_press_event;
    widget_class->popup_menu = popup_menu_event;
    widget_class->key_press_event = key_press_event;

    
    /* Setup signals.  */
    
    signals[CHANGED] =
        g_signal_new ("changed",
                  E_TYPE_MSG_COMPOSER_ATTACHMENT_BAR,
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EMsgComposerAttachmentBarClass, changed),
                  NULL, NULL,
                  g_cclosure_marshal_VOID__VOID,
                  G_TYPE_NONE, 0);
}

static void
init (EMsgComposerAttachmentBar *bar)
{
    EMsgComposerAttachmentBarPrivate *priv;
    
    priv = g_new (EMsgComposerAttachmentBarPrivate, 1);
    
    priv->attachments = NULL;
    priv->context_menu = NULL;
    priv->icon_context_menu = NULL;
    
    priv->num_attachments = 0;
    
    bar->priv = priv;
}


GType
e_msg_composer_attachment_bar_get_type (void)
{
    static GType type = 0;
    
    if (type == 0) {
        static const GTypeInfo info = {
            sizeof (EMsgComposerAttachmentBarClass),
            NULL, NULL,
            (GClassInitFunc) class_init,
            NULL, NULL,
            sizeof (EMsgComposerAttachmentBar),
            0,
            (GInstanceInitFunc) init,
        };
        
        type = g_type_register_static (GNOME_TYPE_ICON_LIST, "EMsgComposerAttachmentBar", &info, 0);
    }
    
    return type;
}

GtkWidget *
e_msg_composer_attachment_bar_new (GtkAdjustment *adj)
{
    EMsgComposerAttachmentBar *new;
    GnomeIconList *icon_list;
    int width, height, icon_width, window_height;
    PangoFontMetrics *metrics;
    PangoContext *context;
    
    new = g_object_new (e_msg_composer_attachment_bar_get_type (), NULL);
    
    icon_list = GNOME_ICON_LIST (new);
    
    context = gtk_widget_get_pango_context ((GtkWidget *) new);
    metrics = pango_context_get_metrics (context, ((GtkWidget *) new)->style->font_desc, pango_context_get_language (context));
    width = PANGO_PIXELS (pango_font_metrics_get_approximate_char_width (metrics)) * 15;
    /* This should be *2, but the icon list creates too much space above ... */
    height = PANGO_PIXELS (pango_font_metrics_get_ascent (metrics) + pango_font_metrics_get_descent (metrics)) * 3;
    pango_font_metrics_unref (metrics);
    
    icon_width = ICON_WIDTH + ICON_SPACING + ICON_BORDER + ICON_TEXT_SPACING;
    icon_width = MAX (icon_width, width);
    
    gnome_icon_list_construct (icon_list, icon_width, adj, 0);
    
    window_height = ICON_WIDTH + ICON_SPACING + ICON_BORDER + ICON_TEXT_SPACING + height;
    gtk_widget_set_size_request (GTK_WIDGET (new), icon_width * 4, window_height);
    
    gnome_icon_list_set_separators (icon_list, ICON_SEPARATORS);
    gnome_icon_list_set_row_spacing (icon_list, ICON_ROW_SPACING);
    gnome_icon_list_set_col_spacing (icon_list, ICON_COL_SPACING);
    gnome_icon_list_set_icon_border (icon_list, ICON_BORDER);
    gnome_icon_list_set_text_spacing (icon_list, ICON_TEXT_SPACING);
    gnome_icon_list_set_selection_mode (icon_list, GTK_SELECTION_MULTIPLE);
    
    return GTK_WIDGET (new);
}

static char *
get_default_charset (void)
{
    GConfClient *gconf;
    const char *locale;
    char *charset;
    
    gconf = gconf_client_get_default ();
    charset = gconf_client_get_string (gconf, "/apps/evolution/mail/composer/charset", NULL);
    
    if (!charset || charset[0] == '\0') {
        g_free (charset);
        charset = gconf_client_get_string (gconf, "/apps/evolution/mail/format/charset", NULL);
        if (charset && charset[0] == '\0') {
            g_free (charset);
            charset = NULL;
        }
    }
    
    g_object_unref (gconf);
    
    if (!charset && (locale = e_iconv_locale_charset ()))
        charset = g_strdup (locale);
    
    return charset ? charset : g_strdup ("us-ascii");
}

static void
attach_to_multipart (CamelMultipart *multipart,
             EMsgComposerAttachment *attachment,
             const char *default_charset)
{
    CamelContentType *content_type;
    CamelDataWrapper *content;
    
    content_type = camel_mime_part_get_content_type (attachment->body);
    content = camel_medium_get_content_object (CAMEL_MEDIUM (attachment->body));
    
    if (!CAMEL_IS_MULTIPART (content)) {
        if (camel_content_type_is (content_type, "text", "*")) {
            CamelTransferEncoding encoding;
            CamelStreamFilter *filter_stream;
            CamelMimeFilterBestenc *bestenc;
            CamelStream *stream;
            const char *charset;
            char *buf = NULL;
            char *type;
            
            charset = camel_content_type_param (content_type, "charset");
            
            stream = camel_stream_null_new ();
            filter_stream = camel_stream_filter_new_with_stream (stream);
            bestenc = camel_mime_filter_bestenc_new (CAMEL_BESTENC_GET_ENCODING);
            camel_stream_filter_add (filter_stream, CAMEL_MIME_FILTER (bestenc));
            camel_object_unref (stream);
            
            camel_data_wrapper_decode_to_stream (content, CAMEL_STREAM (filter_stream));
            camel_object_unref (filter_stream);
            
            encoding = camel_mime_filter_bestenc_get_best_encoding (bestenc, CAMEL_BESTENC_8BIT);
            camel_mime_part_set_encoding (attachment->body, encoding);
            
            if (encoding == CAMEL_TRANSFER_ENCODING_7BIT) {
                /* the text fits within us-ascii so this is safe */
                /* FIXME: check that this isn't iso-2022-jp? */
                default_charset = "us-ascii";
            } else if (!charset) {
                if (!default_charset)
                    default_charset = buf = get_default_charset ();
                
                /* FIXME: We should really check that this fits within the
                                   default_charset and if not find one that does and/or
                   allow the user to specify? */
            }
            
            if (!charset) {
                /* looks kinda nasty, but this is how ya have to do it */
                camel_content_type_set_param (content_type, "charset", default_charset);
                type = camel_content_type_format (content_type);
                camel_mime_part_set_content_type (attachment->body, type);
                g_free (type);
                g_free (buf);
            }
            
            camel_object_unref (bestenc);
        } else if (!CAMEL_IS_MIME_MESSAGE (content)) {
            camel_mime_part_set_encoding (attachment->body, CAMEL_TRANSFER_ENCODING_BASE64);
        }
    }
    
    camel_multipart_add_part (multipart, attachment->body);
}

void
e_msg_composer_attachment_bar_to_multipart (EMsgComposerAttachmentBar *bar,
                        CamelMultipart *multipart,
                        const char *default_charset)
{
    EMsgComposerAttachmentBarPrivate *priv;
    GList *p;
    
    g_return_if_fail (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (bar));
    g_return_if_fail (CAMEL_IS_MULTIPART (multipart));
    
    priv = bar->priv;
    
    for (p = priv->attachments; p != NULL; p = p->next) {
        EMsgComposerAttachment *attachment;
        
        attachment = E_MSG_COMPOSER_ATTACHMENT (p->data);
        attach_to_multipart (multipart, attachment, default_charset);
    }
}


guint
e_msg_composer_attachment_bar_get_num_attachments (EMsgComposerAttachmentBar *bar)
{
    g_return_val_if_fail (bar != NULL, 0);
    g_return_val_if_fail (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (bar), 0);
    
    return bar->priv->num_attachments;
}


void
e_msg_composer_attachment_bar_attach (EMsgComposerAttachmentBar *bar,
                      const gchar *file_name)
{
    g_return_if_fail (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (bar));
    
    if (file_name == NULL)
        add_from_user (bar);
    else
        add_from_file (bar, file_name, "attachment");
}

void
e_msg_composer_attachment_bar_attach_mime_part (EMsgComposerAttachmentBar *bar,
                        CamelMimePart *part)
{
    g_return_if_fail (E_IS_MSG_COMPOSER_ATTACHMENT_BAR (bar));
    
    add_from_mime_part (bar, part);
}