path: root/mail/e-mail-reader.c

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

#include "e-mail-reader.h"

#include <glib/gi18n.h>
#include <gdk/gdkkeysyms.h>
#include <gtkhtml/gtkhtml.h>
#include <gtkhtml/gtkhtml-stream.h>

#ifdef HAVE_XFREE
#include <X11/XF86keysym.h>
#endif

#include "e-util/e-binding.h"
#include "e-util/e-charset.h"
#include "e-util/e-util.h"
#include "e-util/gconf-bridge.h"
#include "shell/e-shell.h"
#include "widgets/misc/e-popup-action.h"

#include "mail/e-mail-browser.h"
#include "mail/e-mail-display.h"
#include "mail/e-mail-reader-utils.h"
#include "mail/em-composer-utils.h"
#include "mail/em-event.h"
#include "mail/em-folder-selector.h"
#include "mail/em-folder-tree.h"
#include "mail/em-utils.h"
#include "mail/mail-autofilter.h"
#include "mail/mail-config.h"
#include "mail/mail-ops.h"
#include "mail/mail-vfolder.h"

enum {
    CHANGED,
    FOLDER_LOADED,
    SHOW_SEARCH_BAR,
    UPDATE_ACTIONS,
    LAST_SIGNAL
};

/* Remembers the previously selected folder when transferring messages. */
static gchar *default_xfer_messages_uri;

static guint signals[LAST_SIGNAL];

static void
action_mail_add_sender_cb (GtkAction *action,
                           EMailReader *reader)
{
    EShell *shell;
    EShellBackend *shell_backend;
    MessageList *message_list;
    CamelMessageInfo *info;
    CamelFolder *folder;
    GPtrArray *uids;
    const gchar *address;

    message_list = e_mail_reader_get_message_list (reader);
    shell_backend = e_mail_reader_get_shell_backend (reader);

    folder = message_list->folder;
    uids = message_list_get_selected (message_list);

    if (uids->len != 1)
        goto exit;

    info = camel_folder_get_message_info (folder, uids->pdata[0]);
    if (info == NULL)
        goto exit;

    address = camel_message_info_from (info);
    if (address == NULL || *address == '\0')
        goto exit;

    /* XXX EBookShellBackend should be listening for this
     *     event.  Kind of kludgey, but works for now. */
    shell = e_shell_backend_get_shell (shell_backend);
    e_shell_event (shell, "contact-quick-add-email", (gpointer) address);
    emu_remove_from_mail_cache_1 (address);
exit:
    em_utils_uids_free (uids);
}

static void
action_add_to_address_book_cb (GtkAction *action,
                               EMailReader *reader)
{
    EShell *shell;
    EShellBackend *shell_backend;
    EMFormatHTMLDisplay *html_display;
    EWebView *web_view;
    CamelURL *curl;
    const gchar *uri;

    /* This action is defined in EMailDisplay. */

    html_display = e_mail_reader_get_html_display (reader);
    shell_backend = e_mail_reader_get_shell_backend (reader);

    web_view = E_WEB_VIEW (EM_FORMAT_HTML (html_display)->html);

    uri = e_web_view_get_selected_uri (web_view);
    g_return_if_fail (uri != NULL);

    curl = camel_url_new (uri, NULL);
    g_return_if_fail (curl != NULL);

    if (curl->path == NULL || *curl->path == '\0')
        goto exit;

    /* XXX EBookShellBackend should be listening for this
     *     event.  Kind of kludgey, but works for now. */
    shell = e_shell_backend_get_shell (shell_backend);
    e_shell_event (shell, "contact-quick-add-email", curl->path);
    emu_remove_from_mail_cache_1 (curl->path);
exit:
    camel_url_free (curl);
}

static void
action_mail_charset_cb (GtkRadioAction *action,
                        GtkRadioAction *current,
                        EMailReader *reader)
{
    EMFormatHTMLDisplay *html_display;
    const gchar *charset;

    if (action != current)
        return;

    html_display = e_mail_reader_get_html_display (reader);
    charset = g_object_get_data (G_OBJECT (action), "charset");

    /* Charset for "Default" action will be NULL. */
    em_format_set_charset (EM_FORMAT (html_display), charset);
}

static void
action_mail_check_for_junk_cb (GtkAction *action,
                               EMailReader *reader)
{
    MessageList *message_list;
    CamelFolder *folder;
    GPtrArray *uids;

    message_list = e_mail_reader_get_message_list (reader);

    folder = message_list->folder;
    uids = message_list_get_selected (message_list);

    mail_filter_junk (folder, uids);
}

static void
action_mail_clipboard_copy_cb (GtkAction *action,
                               EMailReader *reader)
{
    EMFormatHTMLDisplay *html_display;
    GtkHTML *html;

    html_display = e_mail_reader_get_html_display (reader);
    html = EM_FORMAT_HTML (html_display)->html;

    gtk_html_copy (html);
}

static void
action_mail_copy_cb (GtkAction *action,
                     EMailReader *reader)
{
    MessageList *message_list;
    CamelFolder *folder;
    GtkWidget *folder_tree;
    GtkWidget *dialog;
    GtkWindow *parent;
    GPtrArray *selected;
    const gchar *uri;

    parent = e_mail_reader_get_window (reader);
    message_list = e_mail_reader_get_message_list (reader);

    folder_tree = em_folder_tree_new ();
    selected = message_list_get_selected (message_list);

    folder = message_list->folder;

    em_folder_tree_set_excluded (
        EM_FOLDER_TREE (folder_tree),
        EMFT_EXCLUDE_NOSELECT | EMFT_EXCLUDE_VIRTUAL |
        EMFT_EXCLUDE_VTRASH);

    dialog = em_folder_selector_new (
        parent, EM_FOLDER_TREE (folder_tree),
        EM_FOLDER_SELECTOR_CAN_CREATE,
        _("Copy to Folder"), NULL, _("C_opy"));

    if (default_xfer_messages_uri != NULL)
        em_folder_selector_set_selected (
            EM_FOLDER_SELECTOR (dialog),
            default_xfer_messages_uri);

    if (gtk_dialog_run (GTK_DIALOG (dialog)) != GTK_RESPONSE_OK)
        goto exit;

    uri = em_folder_selector_get_selected_uri (
        EM_FOLDER_SELECTOR (dialog));

    g_free (default_xfer_messages_uri);
    default_xfer_messages_uri = g_strdup (uri);

    if (uri != NULL) {
        mail_transfer_messages (
            folder, selected, FALSE, uri, 0, NULL, NULL);
        selected = NULL;
    }

exit:
    if (selected != NULL)
        em_utils_uids_free (selected);

    gtk_widget_destroy (dialog);
}

static void
action_mail_delete_cb (GtkAction *action,
                       EMailReader *reader)
{
    guint32 mask = CAMEL_MESSAGE_SEEN | CAMEL_MESSAGE_DELETED;
    guint32 set  = CAMEL_MESSAGE_SEEN | CAMEL_MESSAGE_DELETED;

    if (!e_mail_reader_confirm_delete (reader))
        return;

    /* FIXME Verify all selected messages are deletable.
     *       But handle it by disabling this action. */

    if (e_mail_reader_mark_selected (reader, mask, set) == 1)
        e_mail_reader_select_next_message (reader, FALSE);
}

static void
action_mail_filter_on_mailing_list_cb (GtkAction *action,
                                       EMailReader *reader)
{
    e_mail_reader_create_filter_from_selected (reader, AUTO_MLIST);
}

static void
action_mail_filter_on_recipients_cb (GtkAction *action,
                                     EMailReader *reader)
{
    e_mail_reader_create_filter_from_selected (reader, AUTO_TO);
}

static void
action_mail_filter_on_sender_cb (GtkAction *action,
                                 EMailReader *reader)
{
    e_mail_reader_create_filter_from_selected (reader, AUTO_FROM);
}

static void
action_mail_filter_on_subject_cb (GtkAction *action,
                                  EMailReader *reader)
{
    e_mail_reader_create_filter_from_selected (reader, AUTO_SUBJECT);
}

static void
action_mail_filters_apply_cb (GtkAction *action,
                              EMailReader *reader)
{
    MessageList *message_list;
    CamelFolder *folder;
    GPtrArray *uids;

    message_list = e_mail_reader_get_message_list (reader);

    folder = message_list->folder;
    uids = message_list_get_selected (message_list);

    mail_filter_on_demand (folder, uids);
}

static void
action_mail_find_cb (GtkAction *action,
                     EMailReader *reader)
{
    e_mail_reader_show_search_bar (reader);
}

static void
action_mail_flag_clear_cb (GtkAction *action,
                           EMailReader *reader)
{
    EMFormatHTMLDisplay *html_display;
    MessageList *message_list;
    CamelFolder *folder;
    GtkWindow *window;
    GPtrArray *uids;

    html_display = e_mail_reader_get_html_display (reader);
    message_list = e_mail_reader_get_message_list (reader);
    window = e_mail_reader_get_window (reader);

    folder = message_list->folder;
    uids = message_list_get_selected (message_list);

    em_utils_flag_for_followup_clear (window, folder, uids);

    em_format_redraw (EM_FORMAT (html_display));
}

static void
action_mail_flag_completed_cb (GtkAction *action,
                               EMailReader *reader)
{
    EMFormatHTMLDisplay *html_display;
    MessageList *message_list;
    CamelFolder *folder;
    GtkWindow *window;
    GPtrArray *uids;

    html_display = e_mail_reader_get_html_display (reader);
    message_list = e_mail_reader_get_message_list (reader);
    window = e_mail_reader_get_window (reader);

    folder = message_list->folder;
    uids = message_list_get_selected (message_list);

    em_utils_flag_for_followup_completed (window, folder, uids);

    em_format_redraw (EM_FORMAT (html_display));
}

static void
action_mail_flag_for_followup_cb (GtkAction *action,
                                  EMailReader *reader)
{
    MessageList *message_list;
    CamelFolder *folder;
    GtkWindow *window;
    GPtrArray *uids;

    message_list = e_mail_reader_get_message_list (reader);
    window = e_mail_reader_get_window (reader);

    folder = message_list->folder;
    uids = message_list_get_selected (message_list);

    em_utils_flag_for_followup (reader, folder, uids);
}

static void
action_mail_forward_cb (GtkAction *action,
                        EMailReader *reader)
{
    MessageList *message_list;
    CamelFolder *folder;
    GtkWindow *window;
    GPtrArray *uids;
    const gchar *folder_uri;

    message_list = e_mail_reader_get_message_list (reader);
    window = e_mail_reader_get_window (reader);

    folder = message_list->folder;
    folder_uri = message_list->folder_uri;
    uids = message_list_get_selected (message_list);

    em_utils_forward_messages (folder, uids, folder_uri);
}

static void
action_mail_forward_attached_cb (GtkAction *action,
                                 EMailReader *reader)
{
    MessageList *message_list;
    CamelFolder *folder;
    GtkWindow *window;
    GPtrArray *uids;
    const gchar *folder_uri;

    message_list = e_mail_reader_get_message_list (reader);
    window = e_mail_reader_get_window (reader);

    folder = message_list->folder;
    folder_uri = message_list->folder_uri;
    uids = message_list_get_selected (message_list);

    em_utils_forward_attached (folder, uids, folder_uri);
}

static void
action_mail_forward_inline_cb (GtkAction *action,
                               EMailReader *reader)
{
    MessageList *message_list;
    CamelFolder *folder;
    GtkWindow *window;
    GPtrArray *uids;
    const gchar *folder_uri;

    message_list = e_mail_reader_get_message_list (reader);
    window = e_mail_reader_get_window (reader);

    folder = message_list->folder;
    folder_uri = message_list->folder_uri;
    uids = message_list_get_selected (message_list);

    em_utils_forward_inline (folder, uids, folder_uri);
}

static void
action_mail_forward_quoted_cb (GtkAction *action,
                               EMailReader *reader)
{
    MessageList *message_list;
    CamelFolder *folder;
    GtkWindow *window;
    GPtrArray *uids;
    const gchar *folder_uri;

    message_list = e_mail_reader_get_message_list (reader);
    window = e_mail_reader_get_window (reader);

    folder = message_list->folder;
    folder_uri = message_list->folder_uri;
    uids = message_list_get_selected (message_list);

    em_utils_forward_quoted (folder, uids, folder_uri);
}

static void
action_mail_load_images_cb (GtkAction *action,
                            EMailReader *reader)
{
    EMFormatHTMLDisplay *html_display;

    html_display = e_mail_reader_get_html_display (reader);

    em_format_html_load_images (EM_FORMAT_HTML (html_display));
}

static void
action_mail_mark_important_cb (GtkAction *action,
                               EMailReader *reader)
{
    guint32 mask = CAMEL_MESSAGE_FLAGGED | CAMEL_MESSAGE_DELETED;
    guint32 set  = CAMEL_MESSAGE_FLAGGED;

    e_mail_reader_mark_selected (reader, mask, set);
}

static void
action_mail_mark_junk_cb (GtkAction *action,
                          EMailReader *reader)
{
    guint32 mask = CAMEL_MESSAGE_SEEN | CAMEL_MESSAGE_JUNK |
        CAMEL_MESSAGE_NOTJUNK | CAMEL_MESSAGE_JUNK_LEARN;
    guint32 set  = CAMEL_MESSAGE_SEEN | CAMEL_MESSAGE_JUNK |
        CAMEL_MESSAGE_JUNK_LEARN;

    if (e_mail_reader_mark_selected (reader, mask, set) == 1)
        e_mail_reader_select_next_message (reader, TRUE);
}

static void
action_mail_mark_notjunk_cb (GtkAction *action,
                             EMailReader *reader)
{
    guint32 mask = CAMEL_MESSAGE_JUNK | CAMEL_MESSAGE_NOTJUNK |
        CAMEL_MESSAGE_JUNK_LEARN;
    guint32 set  = CAMEL_MESSAGE_NOTJUNK | CAMEL_MESSAGE_JUNK_LEARN;

    if (e_mail_reader_mark_selected (reader, mask, set) == 1)
        e_mail_reader_select_next_message (reader, TRUE);
}

static void
action_mail_mark_read_cb (GtkAction *action,
                          EMailReader *reader)
{
    guint32 mask = CAMEL_MESSAGE_SEEN;
    guint32 set  = CAMEL_MESSAGE_SEEN;

    e_mail_reader_mark_selected (reader, mask, set);
}

static void
action_mail_mark_unimportant_cb (GtkAction *action,
                                 EMailReader *reader)
{
    guint32 mask = CAMEL_MESSAGE_FLAGGED;
    guint32 set  = 0;

    e_mail_reader_mark_selected (reader, mask, set);
}

static void
action_mail_mark_unread_cb (GtkAction *action,
                            EMailReader *reader)
{
    MessageList *message_list;
    guint32 mask = CAMEL_MESSAGE_SEEN | CAMEL_MESSAGE_DELETED;
    guint32 set  = 0;

    message_list = e_mail_reader_get_message_list (reader);

    e_mail_reader_mark_selected (reader, mask, set);

    if (message_list->seen_id != 0) {
        g_source_remove (message_list->seen_id);
        message_list->seen_id = 0;
    }
}

static void
action_mail_message_edit_cb (GtkAction *action,
                             EMailReader *reader)
{
    MessageList *message_list;
    CamelFolder *folder;
    GtkWindow *window;
    GPtrArray *uids;

    window = e_mail_reader_get_window (reader);
    message_list = e_mail_reader_get_message_list (reader);

    folder = message_list->folder;
    uids = message_list_get_selected (message_list);

    em_utils_edit_messages (folder, uids, FALSE);
}

static void
action_mail_message_new_cb (GtkAction *action,
                            EMailReader *reader)
{
    MessageList *message_list;
    GtkWindow *window;

    message_list = e_mail_reader_get_message_list (reader);
    window = e_mail_reader_get_window (reader);

    em_utils_compose_new_message (message_list->folder_uri);
}

static void
action_mail_message_open_cb (GtkAction *action,
                             EMailReader *reader)
{
    e_mail_reader_open_selected (reader);
}

static void
action_mail_move_cb (GtkAction *action,
                     EMailReader *reader)
{
    MessageList *message_list;
    CamelFolder *folder;
    GtkWidget *folder_tree;
    GtkWidget *dialog;
    GtkWindow *parent;
    GPtrArray *selected;
    const gchar *uri;

    parent = e_mail_reader_get_window (reader);
    message_list = e_mail_reader_get_message_list (reader);

    folder_tree = em_folder_tree_new ();
    selected = message_list_get_selected (message_list);

    folder = message_list->folder;

    em_folder_tree_set_excluded (
        EM_FOLDER_TREE (folder_tree),
        EMFT_EXCLUDE_NOSELECT | EMFT_EXCLUDE_VIRTUAL |
        EMFT_EXCLUDE_VTRASH);

    dialog = em_folder_selector_new (
        parent, EM_FOLDER_TREE (folder_tree),
        EM_FOLDER_SELECTOR_CAN_CREATE,
        _("Move to Folder"), NULL, _("_Move"));

    if (default_xfer_messages_uri != NULL)
        em_folder_selector_set_selected (
            EM_FOLDER_SELECTOR (dialog),
            default_xfer_messages_uri);

    if (gtk_dialog_run (GTK_DIALOG (dialog)) != GTK_RESPONSE_OK)
        goto exit;

    uri = em_folder_selector_get_selected_uri (
        EM_FOLDER_SELECTOR (dialog));

    g_free (default_xfer_messages_uri);
    default_xfer_messages_uri = g_strdup (uri);

    if (uri != NULL) {
        mail_transfer_messages (
            folder, selected, TRUE, uri, 0, NULL, NULL);
        selected = NULL;
    }

exit:
    if (selected != NULL)
        em_utils_uids_free (selected);

    gtk_widget_destroy (dialog);
}

static void
action_mail_next_cb (GtkAction *action,
                     EMailReader *reader)
{
    MessageList *message_list;
    MessageListSelectDirection direction;
    guint32 flags, mask;

    direction = MESSAGE_LIST_SELECT_NEXT;
    flags = 0;
    mask  = 0;

    message_list = e_mail_reader_get_message_list (reader);
    message_list_select (message_list, direction, flags, mask);
}

static void
action_mail_next_important_cb (GtkAction *action,
                               EMailReader *reader)
{
    MessageList *message_list;
    MessageListSelectDirection direction;
    guint32 flags, mask;

    direction = MESSAGE_LIST_SELECT_NEXT | MESSAGE_LIST_SELECT_WRAP;
    flags = CAMEL_MESSAGE_FLAGGED;
    mask  = CAMEL_MESSAGE_FLAGGED;

    message_list = e_mail_reader_get_message_list (reader);
    message_list_select (message_list, direction, flags, mask);
}

static void
action_mail_next_thread_cb (GtkAction *action,
                            EMailReader *reader)
{
    MessageList *message_list;

    message_list = e_mail_reader_get_message_list (reader);
    message_list_select_next_thread (message_list);
}

static void
action_mail_next_unread_cb (GtkAction *action,
                            EMailReader *reader)
{
    MessageList *message_list;
    MessageListSelectDirection direction;
    guint32 flags, mask;

    direction = MESSAGE_LIST_SELECT_NEXT | MESSAGE_LIST_SELECT_WRAP;
    flags = 0;
    mask  = CAMEL_MESSAGE_SEEN;

    message_list = e_mail_reader_get_message_list (reader);
    message_list_select (message_list, direction, flags, mask);
}

static void
action_mail_previous_cb (GtkAction *action,
                         EMailReader *reader)
{
    MessageList *message_list;
    MessageListSelectDirection direction;
    guint32 flags, mask;

    direction = MESSAGE_LIST_SELECT_PREVIOUS;
    flags = 0;
    mask  = 0;

    message_list = e_mail_reader_get_message_list (reader);
    message_list_select (message_list, direction, flags, mask);
}

static void
action_mail_previous_important_cb (GtkAction *action,
                                   EMailReader *reader)
{
    MessageList *message_list;
    MessageListSelectDirection direction;
    guint32 flags, mask;

    direction = MESSAGE_LIST_SELECT_PREVIOUS | MESSAGE_LIST_SELECT_WRAP;
    flags = CAMEL_MESSAGE_FLAGGED;
    mask  = CAMEL_MESSAGE_FLAGGED;

    message_list = e_mail_reader_get_message_list (reader);
    message_list_select (message_list, direction, flags, mask);
}

static void
action_mail_previous_unread_cb (GtkAction *action,
                                EMailReader *reader)
{
    MessageList *message_list;
    MessageListSelectDirection direction;
    guint32 flags, mask;

    direction = MESSAGE_LIST_SELECT_PREVIOUS | MESSAGE_LIST_SELECT_WRAP;
    flags = 0;
    mask  = CAMEL_MESSAGE_SEEN;

    message_list = e_mail_reader_get_message_list (reader);
    message_list_select (message_list, direction, flags, mask);
}

static void
action_mail_print_cb (GtkAction *action,
                      EMailReader *reader)
{
    GtkPrintOperationAction print_action;

    print_action = GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG;
    e_mail_reader_print (reader, print_action);
}

static void
action_mail_print_preview_cb (GtkAction *action,
                              EMailReader *reader)
{
    GtkPrintOperationAction print_action;

    print_action = GTK_PRINT_OPERATION_ACTION_PREVIEW;
    e_mail_reader_print (reader, print_action);
}

static void
action_mail_redirect_cb (GtkAction *action,
                         EMailReader *reader)
{
    MessageList *message_list;
    CamelFolder *folder;
    GtkWindow *window;
    const gchar *uid;

    message_list = e_mail_reader_get_message_list (reader);
    window = e_mail_reader_get_window (reader);

    folder = message_list->folder;
    uid = message_list->cursor_uid;
    g_return_if_fail (uid != NULL);

    em_utils_redirect_message_by_uid (folder, uid);
}

static void
action_mail_reply_all_cb (GtkAction *action,
                          EMailReader *reader)
{
    e_mail_reader_reply_to_message (reader, REPLY_MODE_ALL);
}

static void
action_mail_reply_list_cb (GtkAction *action,
                           EMailReader *reader)
{
    e_mail_reader_reply_to_message (reader, REPLY_MODE_LIST);
}

static void
action_mail_reply_sender_cb (GtkAction *action,
                             EMailReader *reader)
{
    e_mail_reader_reply_to_message (reader, REPLY_MODE_SENDER);
}

static void
action_mail_save_as_cb (GtkAction *action,
                        EMailReader *reader)
{
    MessageList *message_list;
    CamelFolder *folder;
    GtkWindow *window;
    GPtrArray *uids;

    message_list = e_mail_reader_get_message_list (reader);
    window = e_mail_reader_get_window (reader);

    folder = message_list->folder;
    uids = message_list_get_selected (message_list);

    em_utils_save_messages (window, folder, uids);
}

static void
action_mail_search_folder_from_mailing_list_cb (GtkAction *action,
                                                EMailReader *reader)
{
    e_mail_reader_create_vfolder_from_selected (reader, AUTO_MLIST);
}

static void
action_mail_search_folder_from_recipients_cb (GtkAction *action,
                                              EMailReader *reader)
{
    e_mail_reader_create_vfolder_from_selected (reader, AUTO_TO);
}

static void
action_mail_search_folder_from_sender_cb (GtkAction *action,
                                          EMailReader *reader)
{
    e_mail_reader_create_vfolder_from_selected (reader, AUTO_FROM);
}

static void
action_mail_search_folder_from_subject_cb (GtkAction *action,
                                           EMailReader *reader)
{
    e_mail_reader_create_vfolder_from_selected (reader, AUTO_SUBJECT);
}

static void
action_mail_select_all_cb (GtkAction *action,
                           EMailReader *reader)
{
    EMFormatHTMLDisplay *html_display;
    GtkHTML *html;
    const gchar *action_name;
    gboolean selection_active;

    html_display = e_mail_reader_get_html_display (reader);
    html = EM_FORMAT_HTML (html_display)->html;

    gtk_html_select_all (html);

    action_name = "mail-clipboard-copy";
    action = e_mail_reader_get_action (reader, action_name);
    selection_active = gtk_html_command (html, "is-selection-active");
    gtk_action_set_sensitive (action, selection_active);
}

static void
action_mail_show_all_headers_cb (GtkToggleAction *action,
                                 EMailReader *reader)
{
    EMFormatHTMLDisplay *html_display;
    em_format_mode_t mode;

    html_display = e_mail_reader_get_html_display (reader);

    if (gtk_toggle_action_get_active (action))
        mode = EM_FORMAT_ALLHEADERS;
    else
        mode = EM_FORMAT_NORMAL;

    em_format_set_mode (EM_FORMAT (html_display), mode);
}

static void
action_mail_show_source_cb (GtkAction *action,
                            EMailReader *reader)
{
    EMFormatHTMLDisplay *html_display;
    EShellBackend *shell_backend;
    MessageList *message_list;
    CamelFolder *folder;
    GtkWidget *browser;
    GPtrArray *uids;
    const gchar *folder_uri;

    message_list = e_mail_reader_get_message_list (reader);
    shell_backend = e_mail_reader_get_shell_backend (reader);

    folder = message_list->folder;
    folder_uri = message_list->folder_uri;
    uids = message_list_get_selected (message_list);
    g_return_if_fail (uids->len > 0);

    browser = e_mail_browser_new (shell_backend);
    reader = E_MAIL_READER (browser);
    html_display = e_mail_reader_get_html_display (reader);
    em_format_set_mode (EM_FORMAT (html_display), EM_FORMAT_SOURCE);
    e_mail_reader_set_folder (reader, folder, folder_uri);
    e_mail_reader_set_message (reader, uids->pdata[0]);
    gtk_widget_show (browser);

    message_list_free_uids (message_list, uids);
}

static void
action_mail_toggle_important_cb (GtkAction *action,
                                 EMailReader *reader)
{
    MessageList *message_list;
    CamelFolder *folder;
    GPtrArray *uids;
    guint ii;

    message_list = e_mail_reader_get_message_list (reader);

    folder = message_list->folder;
    uids = message_list_get_selected (message_list);

    camel_folder_freeze (folder);

    for (ii = 0; ii < uids->len; ii++) {
        guint32 flags;

        flags = camel_folder_get_message_flags (
            folder, uids->pdata[ii]);
        flags ^= CAMEL_MESSAGE_FLAGGED;
        if (flags & CAMEL_MESSAGE_FLAGGED)
            flags &= ~CAMEL_MESSAGE_DELETED;
        camel_folder_set_message_flags (
            folder, uids->pdata[ii], CAMEL_MESSAGE_FLAGGED |
            CAMEL_MESSAGE_DELETED, flags);
    }

    camel_folder_thaw (folder);

    message_list_free_uids (message_list, uids);
}

static void
action_mail_undelete_cb (GtkAction *action,
                         EMailReader *reader)
{
    guint32 mask = CAMEL_MESSAGE_DELETED;
    guint32 set  = 0;

    e_mail_reader_mark_selected (reader, mask, set);
}

static void
action_mail_zoom_100_cb (GtkAction *action,
                         EMailReader *reader)
{
    EMFormatHTMLDisplay *html_display;
    GtkHTML *html;

    html_display = e_mail_reader_get_html_display (reader);
    html = EM_FORMAT_HTML (html_display)->html;

    gtk_html_zoom_reset (html);
}

static void
action_mail_zoom_in_cb (GtkAction *action,
                        EMailReader *reader)
{
    EMFormatHTMLDisplay *html_display;
    GtkHTML *html;

    html_display = e_mail_reader_get_html_display (reader);
    html = EM_FORMAT_HTML (html_display)->html;

    gtk_html_zoom_out (html);
}

static void
action_mail_zoom_out_cb (GtkAction *action,
                         EMailReader *reader)
{
    EMFormatHTMLDisplay *html_display;
    GtkHTML *html;

    html_display = e_mail_reader_get_html_display (reader);
    html = EM_FORMAT_HTML (html_display)->html;

    gtk_html_zoom_out (html);
}

static void
action_search_folder_recipient_cb (GtkAction *action,
                                   EMailReader *reader)
{
    EMFormatHTMLDisplay *html_display;
    MessageList *message_list;
    EWebView *web_view;
    CamelURL *curl;
    const gchar *uri;

    /* This action is defined in EMailDisplay. */

    html_display = e_mail_reader_get_html_display (reader);
    message_list = e_mail_reader_get_message_list (reader);

    web_view = E_WEB_VIEW (EM_FORMAT_HTML (html_display)->html);

    uri = e_web_view_get_selected_uri (web_view);
    g_return_if_fail (uri != NULL);

    curl = camel_url_new (uri, NULL);
    g_return_if_fail (curl != NULL);

    if (curl->path != NULL && *curl->path != '\0') {
        CamelInternetAddress *inet_addr;
        const gchar *folder_uri;

        /* Ensure vfolder is running. */
        vfolder_load_storage ();

        folder_uri = message_list->folder_uri;

        inet_addr = camel_internet_address_new ();
        camel_address_decode (CAMEL_ADDRESS (inet_addr), curl->path);
        vfolder_gui_add_from_address (inet_addr, AUTO_TO, folder_uri);
        camel_object_unref (inet_addr);
    }

    camel_url_free (curl);
}

static void
action_search_folder_sender_cb (GtkAction *action,
                                EMailReader *reader)
{
    EMFormatHTMLDisplay *html_display;
    MessageList *message_list;
    EWebView *web_view;
    CamelURL *curl;
    const gchar *uri;

    /* This action is defined in EMailDisplay. */

    html_display = e_mail_reader_get_html_display (reader);
    message_list = e_mail_reader_get_message_list (reader);

    web_view = E_WEB_VIEW (EM_FORMAT_HTML (html_display)->html);

    uri = e_web_view_get_selected_uri (web_view);
    g_return_if_fail (uri != NULL);

    curl = camel_url_new (uri, NULL);
    g_return_if_fail (curl != NULL);

    if (curl->path != NULL && *curl->path != '\0') {
        CamelInternetAddress *inet_addr;
        const gchar *folder_uri;

        /* Ensure vfolder is running. */
        vfolder_load_storage ();

        folder_uri = message_list->folder_uri;

        inet_addr = camel_internet_address_new ();
        camel_address_decode (CAMEL_ADDRESS (inet_addr), curl->path);
        vfolder_gui_add_from_address (inet_addr, AUTO_FROM, folder_uri);
        camel_object_unref (inet_addr);
    }

    camel_url_free (curl);
}

static GtkActionEntry mail_reader_entries[] = {

    { "mail-add-sender",
      NULL,
      N_("A_dd Sender to Address Book"),
      NULL,
      N_("Add sender to address book"),
      G_CALLBACK (action_mail_add_sender_cb) },

    { "mail-check-for-junk",
      "mail-mark-junk",
      N_("Check for _Junk"),
      NULL,
      N_("Filter the selected messages for junk status"),
      G_CALLBACK (action_mail_check_for_junk_cb) },

    { "mail-clipboard-copy",
      GTK_STOCK_COPY,
      NULL,
      NULL,
      N_("Copy selected messages to the clipboard"),
      G_CALLBACK (action_mail_clipboard_copy_cb) },

    { "mail-copy",
      "mail-copy",
      N_("_Copy to Folder..."),
      "<Shift><Control>y",
      N_("Copy selected messages to another folder"),
      G_CALLBACK (action_mail_copy_cb) },

    { "mail-delete",
      "user-trash",
      N_("_Delete Message"),
      "<Control>d",
      N_("Mark the selected messages for deletion"),
      G_CALLBACK (action_mail_delete_cb) },

    { "mail-filter-on-mailing-list",
      NULL,
      N_("Filter on Mailing _List..."),
      NULL,
      N_("Create a rule to filter messages to this mailing list"),
      G_CALLBACK (action_mail_filter_on_mailing_list_cb) },

    { "mail-filter-on-recipients",
      NULL,
      N_("Filter on _Recipients..."),
      NULL,
      N_("Create a rule to filter messages to these recipients"),
      G_CALLBACK (action_mail_filter_on_recipients_cb) },

    { "mail-filter-on-sender",
      NULL,
      N_("Filter on Se_nder..."),
      NULL,
      N_("Create a rule to filter messages from this sender"),
      G_CALLBACK (action_mail_filter_on_sender_cb) },

    { "mail-filter-on-subject",
      NULL,
      N_("Filter on _Subject..."),
      NULL,
      N_("Create a rule to filter messages with this subject"),
      G_CALLBACK (action_mail_filter_on_subject_cb) },

    { "mail-filters-apply",
      "stock_mail-filters-apply",
      N_("A_pply Filters"),
      "<Control>y",
      N_("Apply filter rules to the selected messages"),
      G_CALLBACK (action_mail_filters_apply_cb) },

    { "mail-find",
      GTK_STOCK_FIND,
      N_("_Find in Message..."),
      "<Shift><Control>f",
      N_("Search for text in the body of the displayed message"),
      G_CALLBACK (action_mail_find_cb) },

    { "mail-flag-clear",
      NULL,
      N_("_Clear Flag"),
      NULL,
      N_("Remove the follow-up flag from the selected messages"),
      G_CALLBACK (action_mail_flag_clear_cb) },

    { "mail-flag-completed",
      NULL,
      N_("_Flag Completed"),
      NULL,
      N_("Set the follow-up flag to completed on the selected messages"),
      G_CALLBACK (action_mail_flag_completed_cb) },

    { "mail-flag-for-followup",
      "stock_mail-flag-for-followup",
      N_("Follow _Up..."),
      "<Shift><Control>g",
      N_("Flag the selected messages for follow-up"),
      G_CALLBACK (action_mail_flag_for_followup_cb) },

    { "mail-forward",
      "mail-forward",
      N_("_Forward"),
      "<Control>f",
      N_("Forward the selected message to someone"),
      G_CALLBACK (action_mail_forward_cb) },

    { "mail-forward-attached",
      NULL,
      N_("_Attached"),
      NULL,
      N_("Forward the selected message to someone as an attachment"),
      G_CALLBACK (action_mail_forward_attached_cb) },

    { "mail-forward-inline",
      NULL,
      N_("_Inline"),
      NULL,
      N_("Forward the selected message in the body of a new message"),
      G_CALLBACK (action_mail_forward_inline_cb) },

    { "mail-forward-quoted",
      NULL,
      N_("_Quoted"),
      NULL,
      N_("Forward the selected message quoted like a reply"),
      G_CALLBACK (action_mail_forward_quoted_cb) },

    { "mail-load-images",
      "image-x-generic",
      N_("_Load Images"),
      "<Control>i",
      N_("Force images in HTML mail to be loaded"),
      G_CALLBACK (action_mail_load_images_cb) },

    { "mail-mark-important",
      "mail-mark-important",
      N_("_Important"),
      NULL,
      N_("Mark the selected messages as important"),
      G_CALLBACK (action_mail_mark_important_cb) },

    { "mail-mark-junk",
      "mail-mark-junk",
      N_("_Junk"),
      "<Control>j",
      N_("Mark the selected messages as junk"),
      G_CALLBACK (action_mail_mark_junk_cb) },

    { "mail-mark-notjunk",
      "mail-mark-notjunk",
      N_("_Not Junk"),
      "<Shift><Control>j",
      N_("Mark the selected messages as not being junk"),
      G_CALLBACK (action_mail_mark_notjunk_cb) },

    { "mail-mark-read",
      "mail-mark-read",
      N_("_Read"),
      "<Control>k",
      N_("Mark the selected messages as having been read"),
      G_CALLBACK (action_mail_mark_read_cb) },

    { "mail-mark-unimportant",
      NULL,
      N_("Uni_mportant"),
      NULL,
      N_("Mark the selected messages as unimportant"),
      G_CALLBACK (action_mail_mark_unimportant_cb) },

    { "mail-mark-unread",
      "mail-mark-unread",
      N_("_Unread"),
      "<Shift><Control>k",
      N_("Mark the selected messages as not having been read"),
      G_CALLBACK (action_mail_mark_unread_cb) },

    { "mail-message-edit",
      NULL,
      N_("_Edit as New Message..."),
      NULL,
      N_("Open the selected messages in the composer for editing"),
      G_CALLBACK (action_mail_message_edit_cb) },

    { "mail-message-new",
      "mail-message-new",
      N_("Compose _New Message"),
      "<Shift><Control>m",
      N_("Open a window for composing a mail message"),
      G_CALLBACK (action_mail_message_new_cb) },

    { "mail-message-open",
      NULL,
      N_("_Open in New Window"),
      "<Control>o",
      N_("Open the selected messages in a new window"),
      G_CALLBACK (action_mail_message_open_cb) },

    { "mail-move",
      "mail-move",
      N_("_Move to Folder..."),
      "<Shift><Control>v",
      N_("Move selected messages to another folder"),
      G_CALLBACK (action_mail_move_cb) },

    { "mail-next",
      GTK_STOCK_GO_FORWARD,
      N_("_Next Message"),
      "<Control>Page_Down",
      N_("Display the next message"),
      G_CALLBACK (action_mail_next_cb) },

    { "mail-next-important",
      NULL,
      N_("Next _Important Message"),
      NULL,
      N_("Display the next important message"),
      G_CALLBACK (action_mail_next_important_cb) },

    { "mail-next-thread",
      NULL,
      N_("Next _Thread"),
      NULL,
      N_("Display the next thread"),
      G_CALLBACK (action_mail_next_thread_cb) },

    { "mail-next-unread",
      NULL,
      N_("Next _Unread Message"),
      "<Control>bracketright",
      N_("Display the next unread message"),
      G_CALLBACK (action_mail_next_unread_cb) },

    { "mail-previous",
      GTK_STOCK_GO_BACK,
      N_("_Previous Message"),
      "<Control>Page_Up",
      N_("Display the previous message"),
      G_CALLBACK (action_mail_previous_cb) },

    { "mail-previous-important",
      NULL,
      N_("Pr_evious Important Message"),
      NULL,
      N_("Display the previous important message"),
      G_CALLBACK (action_mail_previous_important_cb) },

    { "mail-previous-unread",
      NULL,
      N_("P_revious Unread Message"),
      "<Control>bracketleft",
      N_("Display the previous unread message"),
      G_CALLBACK (action_mail_previous_unread_cb) },

    { "mail-print",
      GTK_STOCK_PRINT,
      NULL,
      "<Control>p",
      N_("Print this message"),
      G_CALLBACK (action_mail_print_cb) },

    { "mail-print-preview",
      GTK_STOCK_PRINT_PREVIEW,
      NULL,
      NULL,
      N_("Preview the message to be printed"),
      G_CALLBACK (action_mail_print_preview_cb) },

    { "mail-redirect",
      NULL,
      N_("Re_direct"),
      NULL,
      N_("Redirect (bounce) the selected message to someone"),
      G_CALLBACK (action_mail_redirect_cb) },

    { "mail-reply-all",
      "mail-reply-all",
      N_("Reply to _All"),
      "<Shift><Control>r",
      N_("Compose a reply to all the recipients of the selected message"),
      G_CALLBACK (action_mail_reply_all_cb) },

    { "mail-reply-list",
      NULL,
      N_("Reply to _List"),
      "<Control>l",
      N_("Compose a reply to the mailing list of the selected message"),
      G_CALLBACK (action_mail_reply_list_cb) },

    { "mail-reply-sender",
      "mail-reply-sender",
      N_("_Reply to Sender"),
      "<Control>r",
      N_("Compose a reply to the sender of the selected message"),
      G_CALLBACK (action_mail_reply_sender_cb) },

    { "mail-save-as",
      GTK_STOCK_SAVE_AS,
      N_("_Save as mbox..."),
      NULL,
      N_("Save selected messages as an mbox file"),
      G_CALLBACK (action_mail_save_as_cb) },

    { "mail-search-folder-from-mailing-list",
      NULL,
      N_("Search Folder from Mailing _List..."),
      NULL,
      N_("Create a search folder for this mailing list"),
      G_CALLBACK (action_mail_search_folder_from_mailing_list_cb) },

    { "mail-search-folder-from-recipients",
      NULL,
      N_("Search Folder from Recipien_ts..."),
      NULL,
      N_("Create a search folder for these recipients"),
      G_CALLBACK (action_mail_search_folder_from_recipients_cb) },

    { "mail-search-folder-from-sender",
      NULL,
      N_("Search Folder from Sen_der..."),
      NULL,
      N_("Create a search folder for this sender"),
      G_CALLBACK (action_mail_search_folder_from_sender_cb) },

    { "mail-search-folder-from-subject",
      NULL,
      N_("Search Folder from S_ubject..."),
      NULL,
      N_("Create a search folder for this subject"),
      G_CALLBACK (action_mail_search_folder_from_subject_cb) },

    { "mail-select-all",
      NULL,
      N_("Select _All Text"),
      "<Shift><Control>x",
      N_("Select all the text in a message"),
      G_CALLBACK (action_mail_select_all_cb) },

    { "mail-show-source",
      NULL,
      N_("_Message Source"),
      "<Control>u",
      N_("Show the raw email source of the message"),
      G_CALLBACK (action_mail_show_source_cb) },

    { "mail-toggle-important",
      NULL,
      NULL,  /* No menu item; key press only */
      NULL,
      NULL,
      G_CALLBACK (action_mail_toggle_important_cb) },

    { "mail-undelete",
      NULL,
      N_("_Undelete Message"),
      "<Shift><Control>d",
      N_("Undelete the selected messages"),
      G_CALLBACK (action_mail_undelete_cb) },

    { "mail-zoom-100",
      GTK_STOCK_ZOOM_100,
      N_("_Normal Size"),
      "<Control>0",
      N_("Reset the text to its original size"),
      G_CALLBACK (action_mail_zoom_100_cb) },

    { "mail-zoom-in",
      GTK_STOCK_ZOOM_IN,
      N_("_Zoom In"),
      "<Control>plus",
      N_("Increase the text size"),
      G_CALLBACK (action_mail_zoom_in_cb) },

    { "mail-zoom-out",
      GTK_STOCK_ZOOM_OUT,
      N_("Zoom _Out"),
      "<Control>minus",
      N_("Decrease the text size"),
      G_CALLBACK (action_mail_zoom_out_cb) },

    /*** Menus ***/

    { "mail-create-rule-menu",
      NULL,
      N_("Create R_ule"),
      NULL,
      NULL,
      NULL },

    { "mail-encoding-menu",
      NULL,
      N_("Ch_aracter Encoding"),
      NULL,
      NULL,
      NULL },

    { "mail-forward-as-menu",
      NULL,
      N_("F_orward As"),
      NULL,
      NULL,
      NULL },

    { "mail-goto-menu",
      GTK_STOCK_JUMP_TO,
      N_("_Go To"),
      NULL,
      NULL,
      NULL },

    { "mail-mark-as-menu",
      NULL,
      N_("Mar_k As"),
      NULL,
      NULL,
      NULL },

    { "mail-message-menu",
      NULL,
      N_("_Message"),
      NULL,
      NULL,
      NULL },

    { "mail-zoom-menu",
      NULL,
      N_("_Zoom"),
      NULL,
      NULL,
      NULL }
};

static EPopupActionEntry mail_reader_popup_entries[] = {

    { "mail-popup-clipboard-copy",
      NULL,
      "mail-clipboard-copy" },

    { "mail-popup-copy",
      NULL,
      "mail-copy" },

    { "mail-popup-delete",
      NULL,
      "mail-delete" },

    { "mail-popup-flag-for-followup",
      N_("Mark for Follo_w Up..."),
      "mail-flag-for-followup" },

    { "mail-popup-forward",
      NULL,
      "mail-forward" },

    { "mail-popup-mark-important",
      N_("Mark as _Important"),
      "mail-mark-important" },

    { "mail-popup-mark-junk",
      N_("Mark as _Junk"),
      "mail-mark-junk" },

    { "mail-popup-mark-notjunk",
      N_("Mark as _Not Junk"),
      "mail-mark-notjunk" },

    { "mail-popup-mark-read",
      N_("Mar_k as Read"),
      "mail-mark-read" },

    { "mail-popup-mark-unimportant",
      N_("Mark as Uni_mportant"),
      "mail-mark-unimportant" },

    { "mail-popup-mark-unread",
      N_("Mark as _Unread"),
      "mail-mark-unread" },

    { "mail-popup-message-edit",
      NULL,
      "mail-message-edit" },

    { "mail-popup-move",
      NULL,
      "mail-move" },

    { "mail-popup-print",
      NULL,
      "mail-print" },

    { "mail-popup-reply-all",
      NULL,
      "mail-reply-all" },

    { "mail-popup-reply-sender",
      NULL,
      "mail-reply-sender" },

    { "mail-popup-save-as",
      NULL,
      "mail-save-as" },

    { "mail-popup-undelete",
      NULL,
      "mail-undelete" }
};

static GtkToggleActionEntry mail_reader_toggle_entries[] = {

    { "mail-caret-mode",
      NULL,
      N_("_Caret Mode"),
      "F7",
      N_("Show a blinking cursor in the body of displayed messages"),
      NULL,  /* No callback required */
      FALSE },

    { "mail-show-all-headers",
      NULL,
      N_("All Message _Headers"),
      NULL,
      N_("Show messages with all email headers"),
      G_CALLBACK (action_mail_show_all_headers_cb),
      FALSE }
};

static gboolean
mail_reader_button_release_event_cb (EMailReader *reader,
                                     GdkEventButton *button,
                                     GtkHTML *html)
{
    GtkAction *action;
    const gchar *action_name;
    gboolean selection_active;

    action_name = "mail-clipboard-copy";
    action = e_mail_reader_get_action (reader, action_name);
    selection_active = gtk_html_command (html, "is-selection-active");
    gtk_action_set_sensitive (action, selection_active);

    return FALSE;
}

static void
mail_reader_double_click_cb (EMailReader *reader,
                             gint row,
                             ETreePath path,
                             gint col,
                             GdkEvent *event)
{
    /* Ignore double clicks on columns that handle their own state. */
    if (MESSAGE_LIST_COLUMN_IS_ACTIVE (col))
        return;

    e_mail_reader_activate (reader, "mail-message-open");
}

static gboolean
mail_reader_key_press_event_cb (EMailReader *reader,
                                GdkEventKey *event)
{
    const gchar *action_name;

    if ((event->state & GDK_CONTROL_MASK) != 0)
        goto ctrl;

    /* <keyval> alone */
    switch (event->keyval) {
        case GDK_Delete:
        case GDK_KP_Delete:
            action_name = "mail-delete";
            break;

        case GDK_Return:
        case GDK_KP_Enter:
        case GDK_ISO_Enter:
            action_name = "mail-message-open";
            break;

        case GDK_period:
        case GDK_bracketleft:
            action_name = "mail-next-unread";
            break;

        case GDK_comma:
        case GDK_bracketright:
            action_name = "mail-previous-unread";
            break;

#ifdef HAVE_XFREE
        case XF86XK_Reply:
            action_name = "mail-reply-all";
            break;

        case XF86XK_MailForward:
            action_name = "mail-forward";
            break;
#endif

        case GDK_exclam:
            action_name = "mail-toggle-important";
            break;

        default:
            return FALSE;
    }

    goto exit;

ctrl:

    /* Ctrl + <keyval> */
    switch (event->keyval) {
        case GDK_period:
            action_name = "mail-next-unread";
            break;

        case GDK_comma:
            action_name = "mail-previous-unread";
            break;

        default:
            return FALSE;
    }

exit:
    e_mail_reader_activate (reader, action_name);

    return TRUE;
}

static gint
mail_reader_key_press_cb (EMailReader *reader,
                          gint row,
                          ETreePath path,
                          gint col,
                          GdkEvent *event)
{
    return mail_reader_key_press_event_cb (reader, &event->key);
}

static gboolean
mail_reader_message_read_cb (EMailReader *reader)
{
    MessageList *message_list;
    const gchar *uid;

    message_list = e_mail_reader_get_message_list (reader);

    uid = g_object_get_data (G_OBJECT (reader), "mark-read-uid");
    g_return_val_if_fail (uid != NULL, FALSE);

    if (g_strcmp0 (message_list->cursor_uid, uid) == 0)
        e_mail_reader_mark_as_read (reader, uid);

    return FALSE;
}

static void
mail_reader_message_loaded_cb (CamelFolder *folder,
                               const gchar *message_uid,
                               CamelMimeMessage *message,
                               gpointer user_data,
                               CamelException *ex)
{
    EMailReader *reader = user_data;
    EMFormatHTMLDisplay *html_display;
    MessageList *message_list;
    EShellBackend *shell_backend;
    EShellSettings *shell_settings;
    EShell *shell;
    EMEvent *event;
    EMEventTargetMessage *target;
    gboolean mark_read;
    gint timeout_interval;

    html_display = e_mail_reader_get_html_display (reader);
    message_list = e_mail_reader_get_message_list (reader);

    shell_backend = e_mail_reader_get_shell_backend (reader);
    shell = e_shell_backend_get_shell (shell_backend);
    shell_settings = e_shell_get_shell_settings (shell);

    /* If the user picked a different message in the time it took
     * to fetch this message, then don't bother rendering it. */
    if (g_strcmp0 (message_list->cursor_uid, message_uid) != 0)
        return;

    /** @Event: message.reading
     * @Title: Viewing a message
     * @Target: EMEventTargetMessage
     *
     * message.reading is emitted whenever a user views a message.
     */
    event = em_event_peek ();
    target = em_event_target_new_message (
        event, folder, message, message_uid, 0, NULL);
    e_event_emit (
        (EEvent *) event, "message.reading",
        (EEventTarget *) target);

    em_format_format (
        EM_FORMAT (html_display), folder, message_uid, message);

    /* Reset the shell view icon. */
    e_shell_event (shell, "mail-icon", (gpointer) "evolution-mail");

    /* Determine whether to mark the message as read. */
    mark_read = e_shell_settings_get_boolean (
        shell_settings, "mail-mark-seen");
    timeout_interval = e_shell_settings_get_int (
        shell_settings, "mail-mark-seen-timeout");

    g_object_set_data_full (
        G_OBJECT (reader), "mark-read-uid",
        g_strdup (message_uid), (GDestroyNotify) g_free);

    if (message_list->seen_id > 0)
        g_source_remove (message_list->seen_id);

    if (message != NULL && mark_read) {
        message_list->seen_id = g_timeout_add (
            timeout_interval, (GSourceFunc)
            mail_reader_message_read_cb, reader);

    } else if (camel_exception_is_set (ex)) {
        GtkHTMLStream *stream;

        /* Display the error inline and clear the exception. */
        stream = gtk_html_begin (
            EM_FORMAT_HTML (html_display)->html);
        gtk_html_stream_printf (
            stream, "<h2>%s</h2><p>%s</p>",
            _("Unable to retrieve message"),
            ex->desc);
        gtk_html_stream_close (stream, GTK_HTML_STREAM_OK);
        camel_exception_clear (ex);
    }

    /* We referenced this in the call to mail_get_messagex(). */
    g_object_unref (reader);
}

static gboolean
mail_reader_message_selected_timeout_cb (EMailReader *reader)
{
    EMFormatHTMLDisplay *html_display;
    MessageList *message_list;
    const gchar *cursor_uid;
    const gchar *format_uid;
    const gchar *key;

    html_display = e_mail_reader_get_html_display (reader);
    message_list = e_mail_reader_get_message_list (reader);

    cursor_uid = message_list->cursor_uid;
    format_uid = EM_FORMAT (html_display)->uid;

    if (message_list->last_sel_single) {
        GtkWidget *widget;
        gboolean html_display_visible;
        gboolean selected_uid_changed;

        /* Decide whether to download the full message now. */

        widget = GTK_WIDGET (EM_FORMAT_HTML (html_display)->html);

        html_display_visible = GTK_WIDGET_MAPPED (widget);
        selected_uid_changed = g_strcmp0 (cursor_uid, format_uid);

        if (html_display_visible && selected_uid_changed) {
            gint op_id;

            op_id = mail_get_messagex (
                message_list->folder, cursor_uid,
                mail_reader_message_loaded_cb,
                g_object_ref (reader),
                mail_msg_fast_ordered_push);

            g_object_set_data (G_OBJECT (reader), "preview-get-message-op-id", GINT_TO_POINTER (op_id));
        }
    } else
        em_format_format (EM_FORMAT (html_display), NULL, NULL, NULL);

    key = "message-selected-timeout";
    g_object_set_data (G_OBJECT (reader), key, NULL);

    return FALSE;
}

static void
mail_reader_message_selected_cb (EMailReader *reader,
                                 const gchar *uid)
{
    GSource *source;
    const gchar *key;
    gint op_id;

    /* cancel previous message fetching, if any, first */
    op_id = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (reader), "preview-get-message-op-id"));
    if (op_id)
        mail_msg_cancel (op_id);

    /* XXX This is kludgy, but we have no other place to store timeout
     * state information.  Addendum: See EAttachmentView for an example
     * of storing private data in an interface.  Clunky but works. */

    key = "message-selected-timeout";

    source = g_timeout_source_new (100);

    g_source_set_priority (source, G_PRIORITY_DEFAULT);

    g_source_set_callback (
        source, (GSourceFunc)
        mail_reader_message_selected_timeout_cb, reader, NULL);

    g_object_set_data_full (
        G_OBJECT (reader), key, source,
        (GDestroyNotify) g_source_destroy);

    g_source_attach (source, NULL);

    e_mail_reader_changed (reader);
}

static void
mail_reader_emit_folder_loaded (EMailReader *reader)
{
    g_signal_emit (reader, signals[FOLDER_LOADED], 0);
}

static void
mail_reader_set_folder (EMailReader *reader,
                        CamelFolder *folder,
                        const gchar *folder_uri)
{
    EMFormatHTMLDisplay *html_display;
    MessageList *message_list;
    gboolean outgoing;

    html_display = e_mail_reader_get_html_display (reader);
    message_list = e_mail_reader_get_message_list (reader);

    outgoing = folder != NULL && folder_uri != NULL && (
        em_utils_folder_is_drafts (folder, folder_uri) ||
        em_utils_folder_is_outbox (folder, folder_uri) ||
        em_utils_folder_is_sent (folder, folder_uri));

    if (message_list->folder != NULL)
        mail_sync_folder (message_list->folder, NULL, NULL);

    em_format_format (EM_FORMAT (html_display), NULL, NULL, NULL);
    message_list_set_folder (message_list, folder, folder_uri, outgoing);

    mail_reader_emit_folder_loaded (reader);
}

static void
mail_reader_set_message (EMailReader *reader,
                         const gchar *uid)
{
    MessageList *message_list;

    message_list = e_mail_reader_get_message_list (reader);
    message_list_select_uid (message_list, uid);
}

static void
mail_reader_update_actions (EMailReader *reader)
{
    EShell *shell;
    EShellBackend *shell_backend;
    EShellSettings *shell_settings;
    GtkAction *action;
    GtkActionGroup *action_group;
    const gchar *action_name;
    gboolean sensitive;
    guint32 state;

    /* Be descriptive. */
    gboolean any_messages_selected;
    gboolean disable_printing;
    gboolean enable_flag_clear;
    gboolean enable_flag_completed;
    gboolean enable_flag_for_followup;
    gboolean have_an_account;
    gboolean multiple_messages_selected;
    gboolean selection_has_deleted_messages;
    gboolean selection_has_important_messages;
    gboolean selection_has_junk_messages;
    gboolean selection_has_not_junk_messages;
    gboolean selection_has_read_messages;
    gboolean selection_has_undeleted_messages;
    gboolean selection_has_unimportant_messages;
    gboolean selection_has_unread_messages;
    gboolean selection_is_mailing_list;
    gboolean single_message_selected;

    action_group = e_mail_reader_get_action_group (reader);
    state = e_mail_reader_check_state (reader);

    shell_backend = e_mail_reader_get_shell_backend (reader);
    shell = e_shell_backend_get_shell (shell_backend);
    shell_settings = e_shell_get_shell_settings (shell);

    disable_printing = e_shell_settings_get_boolean (
        shell_settings, "disable-printing");

    have_an_account =
        (state & E_MAIL_READER_HAVE_ACCOUNT);
    single_message_selected =
        (state & E_MAIL_READER_SELECTION_SINGLE);
    multiple_messages_selected =
        (state & E_MAIL_READER_SELECTION_MULTIPLE);
    /* FIXME Missing CAN_ADD_SENDER */
    enable_flag_clear =
        (state & E_MAIL_READER_SELECTION_FLAG_CLEAR);
    enable_flag_completed =
        (state & E_MAIL_READER_SELECTION_FLAG_COMPLETED);
    enable_flag_for_followup =
        (state & E_MAIL_READER_SELECTION_FLAG_FOLLOWUP);
    selection_has_deleted_messages =
        (state & E_MAIL_READER_SELECTION_HAS_DELETED);
    selection_has_important_messages =
        (state & E_MAIL_READER_SELECTION_HAS_IMPORTANT);
    selection_has_junk_messages =
        (state & E_MAIL_READER_SELECTION_HAS_JUNK);
    selection_has_not_junk_messages =
        (state & E_MAIL_READER_SELECTION_HAS_NOT_JUNK);
    selection_has_read_messages =
        (state & E_MAIL_READER_SELECTION_HAS_READ);
    selection_has_undeleted_messages =
        (state & E_MAIL_READER_SELECTION_HAS_UNDELETED);
    selection_has_unimportant_messages =
        (state & E_MAIL_READER_SELECTION_HAS_UNIMPORTANT);
    selection_has_unread_messages =
        (state & E_MAIL_READER_SELECTION_HAS_UNREAD);
    selection_is_mailing_list =
        (state & E_MAIL_READER_SELECTION_IS_MAILING_LIST);

    any_messages_selected =
        (single_message_selected || multiple_messages_selected);

    action_name = "mail-check-for-junk";
    sensitive = any_messages_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-copy";
    sensitive = any_messages_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-delete";
    sensitive = selection_has_undeleted_messages;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-filters-apply";
    sensitive = any_messages_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-forward";
    sensitive = have_an_account && any_messages_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-forward-attached";
    sensitive = have_an_account && any_messages_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-forward-inline";
    sensitive = have_an_account && single_message_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-forward-quoted";
    sensitive = have_an_account && single_message_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-load-images";
    sensitive = single_message_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-mark-important";
    sensitive = selection_has_unimportant_messages;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-mark-junk";
    sensitive = selection_has_not_junk_messages;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-mark-notjunk";
    sensitive = selection_has_junk_messages;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-mark-read";
    sensitive = selection_has_unread_messages;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-mark-unimportant";
    sensitive = selection_has_important_messages;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-mark-unread";
    sensitive = selection_has_read_messages;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-message-edit";
    sensitive = have_an_account && single_message_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-message-new";
    sensitive = have_an_account;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-message-open";
    sensitive = any_messages_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-move";
    sensitive = any_messages_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-next-important";
    sensitive = single_message_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-next-thread";
    sensitive = single_message_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-next-unread";
    sensitive = any_messages_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-previous-important";
    sensitive = single_message_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-previous-unread";
    sensitive = any_messages_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-print";
    sensitive = single_message_selected && !disable_printing;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-print-preview";
    sensitive = single_message_selected && !disable_printing;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-redirect";
    sensitive = have_an_account && single_message_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-reply-all";
    sensitive = have_an_account && single_message_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-reply-list";
    sensitive = have_an_account && single_message_selected &&
        selection_is_mailing_list;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-reply-sender";
    sensitive = have_an_account && single_message_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-save-as";
    sensitive = any_messages_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-select-all";
    sensitive = single_message_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-show-source";
    sensitive = single_message_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-undelete";
    sensitive = selection_has_deleted_messages;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-zoom-100";
    sensitive = single_message_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-zoom-in";
    sensitive = single_message_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);

    action_name = "mail-zoom-out";
    sensitive = single_message_selected;
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, sensitive);
}

static void
mail_reader_init_charset_actions (EMailReader *reader)
{
    GtkActionGroup *action_group;
    GtkRadioAction *default_action;
    GSList *radio_group;

    action_group = e_mail_reader_get_action_group (reader);

    radio_group = e_charset_add_radio_actions (
        action_group, "mail-charset-", NULL,
        G_CALLBACK (action_mail_charset_cb), reader);

    /* XXX Add a tooltip! */
    default_action = gtk_radio_action_new (
        "mail-charset-default", _("Default"), NULL, NULL, -1);

    gtk_radio_action_set_group (default_action, radio_group);

    g_signal_connect (
        default_action, "changed",
        G_CALLBACK (action_mail_charset_cb), reader);

    gtk_action_group_add_action (
        action_group, GTK_ACTION (default_action));

    gtk_radio_action_set_current_value (default_action, -1);
}

static void
mail_reader_class_init (EMailReaderIface *iface)
{
    iface->set_folder = mail_reader_set_folder;
    iface->set_message = mail_reader_set_message;
    iface->update_actions = mail_reader_update_actions;

    signals[CHANGED] = g_signal_new (
        "changed",
        G_OBJECT_CLASS_TYPE (iface),
        G_SIGNAL_RUN_FIRST,
        0, NULL, NULL,
        g_cclosure_marshal_VOID__VOID,
        G_TYPE_NONE, 0);

    signals[FOLDER_LOADED] = g_signal_new (
        "folder-loaded",
        G_OBJECT_CLASS_TYPE (iface),
        G_SIGNAL_RUN_FIRST,
        0, NULL, NULL,
        g_cclosure_marshal_VOID__VOID,
        G_TYPE_NONE, 0);

    signals[SHOW_SEARCH_BAR] = g_signal_new (
        "show-search-bar",
        G_OBJECT_CLASS_TYPE (iface),
        G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
        G_STRUCT_OFFSET (EMailReaderIface, show_search_bar),
        NULL, NULL,
        g_cclosure_marshal_VOID__VOID,
        G_TYPE_NONE, 0);

    signals[UPDATE_ACTIONS] = g_signal_new (
        "update-actions",
        G_OBJECT_CLASS_TYPE (iface),
        G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
        G_STRUCT_OFFSET (EMailReaderIface, update_actions),
        NULL, NULL,
        g_cclosure_marshal_VOID__VOID,
        G_TYPE_NONE, 0);
}

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

    if (G_UNLIKELY (type == 0)) {
        static const GTypeInfo type_info = {
            sizeof (EMailReaderIface),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) mail_reader_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,  /* class_data */
            0,     /* instance_size */
            0,     /* n_preallocs */
            (GInstanceInitFunc) NULL,
            NULL   /* value_table */
        };

        type = g_type_register_static (
            G_TYPE_INTERFACE, "EMailReader", &type_info, 0);

        g_type_interface_add_prerequisite (type, G_TYPE_OBJECT);
    }

    return type;
}

void
e_mail_reader_init (EMailReader *reader)
{
    EShell *shell;
    EShellBackend *shell_backend;
    EShellSettings *shell_settings;
    EMFormatHTMLDisplay *html_display;
    EWebView *web_view;
    GtkActionGroup *action_group;
    MessageList *message_list;
    GConfBridge *bridge;
    GtkAction *action;
    const gchar *action_name;
    const gchar *key;

    g_return_if_fail (E_IS_MAIL_READER (reader));

    action_group = e_mail_reader_get_action_group (reader);
    html_display = e_mail_reader_get_html_display (reader);
    message_list = e_mail_reader_get_message_list (reader);
    shell_backend = e_mail_reader_get_shell_backend (reader);

    shell = e_shell_backend_get_shell (shell_backend);
    shell_settings = e_shell_get_shell_settings (shell);

    web_view = E_WEB_VIEW (EM_FORMAT_HTML (html_display)->html);

    gtk_action_group_add_actions (
        action_group, mail_reader_entries,
        G_N_ELEMENTS (mail_reader_entries), reader);
    e_action_group_add_popup_actions (
        action_group, mail_reader_popup_entries,
        G_N_ELEMENTS (mail_reader_popup_entries));
    gtk_action_group_add_toggle_actions (
        action_group, mail_reader_toggle_entries,
        G_N_ELEMENTS (mail_reader_toggle_entries), reader);

    mail_reader_init_charset_actions (reader);

    /* Bind GObject properties to GConf keys. */

    bridge = gconf_bridge_get ();

    action_name = "mail-caret-mode";
    key = "/apps/evolution/mail/display/caret_mode";
    action = e_mail_reader_get_action (reader, action_name);
    gconf_bridge_bind_property (bridge, key, G_OBJECT (action), "active");

    action_name = "mail-show-all-headers";
    key = "/apps/evolution/mail/display/show_all_headers";
    action = e_mail_reader_get_action (reader, action_name);
    gconf_bridge_bind_property (bridge, key, G_OBJECT (action), "active");

    /* Fine tuning. */

    action_name = "mail-clipboard-copy";
    action = e_mail_reader_get_action (reader, action_name);
    gtk_action_set_sensitive (action, FALSE);

    action_name = "mail-delete";
    action = e_mail_reader_get_action (reader, action_name);
    g_object_set (action, "short-label", _("Delete"), NULL);

    action_name = "mail-next";
    action = e_mail_reader_get_action (reader, action_name);
    g_object_set (action, "short-label", _("Next"), NULL);

    action_name = "mail-previous";
    action = e_mail_reader_get_action (reader, action_name);
    g_object_set (action, "short-label", _("Previous"), NULL);

    action_name = "mail-reply-sender";
    action = e_mail_reader_get_action (reader, action_name);
    g_object_set (action, "short-label", _("Reply"), NULL);

    action_name = "add-to-address-book";
    action = e_web_view_get_action (web_view, action_name);
    g_signal_connect (
        action, "activate",
        G_CALLBACK (action_add_to_address_book_cb), reader);

    action_name = "search-folder-recipient";
    action = e_web_view_get_action (web_view, action_name);
    g_signal_connect (
        action, "activate",
        G_CALLBACK (action_search_folder_recipient_cb), reader);

    action_name = "search-folder-sender";
    action = e_web_view_get_action (web_view, action_name);
    g_signal_connect (
        action, "activate",
        G_CALLBACK (action_search_folder_sender_cb), reader);

    /* Bind properties. */

    e_binding_new_full (
        shell_settings, "mail-citation-color",
        html_display, "citation-color",
        e_binding_transform_string_to_color,
        NULL, NULL);

    e_binding_new (
        shell_settings, "mail-image-loading-policy",
        html_display, "image-loading-policy");

    e_binding_new (
        shell_settings, "mail-only-local-photos",
        html_display, "only-local-photos");

    e_binding_new (
        shell_settings, "mail-show-animated-images",
        web_view, "animate");

    e_binding_new (
        shell_settings, "mail-show-sender-photo",
        html_display, "show-sender-photo");

    action_name = "mail-caret-mode";
    action = e_mail_reader_get_action (reader, action_name);

    e_mutual_binding_new (
        action, "active",
        web_view, "caret-mode");

    /* Connect signals. */

    g_signal_connect_swapped (
        web_view, "button-release-event",
        G_CALLBACK (mail_reader_button_release_event_cb), reader);

    g_signal_connect_swapped (
        web_view, "key-press-event",
        G_CALLBACK (mail_reader_key_press_event_cb), reader);

    g_signal_connect_swapped (
        message_list, "message-selected",
        G_CALLBACK (mail_reader_message_selected_cb), reader);

    g_signal_connect_swapped (
        message_list, "message-list-built",
        G_CALLBACK (mail_reader_emit_folder_loaded), reader);

    g_signal_connect_swapped (
        message_list->tree, "double-click",
        G_CALLBACK (mail_reader_double_click_cb), reader);

    g_signal_connect_swapped (
        message_list->tree, "key-press",
        G_CALLBACK (mail_reader_key_press_cb), reader);

    g_signal_connect_swapped (
        message_list->tree, "selection-change",
        G_CALLBACK (e_mail_reader_changed), reader);
}

void
e_mail_reader_changed (EMailReader *reader)
{
    g_return_if_fail (E_IS_MAIL_READER (reader));

    g_signal_emit (reader, signals[CHANGED], 0);
}

guint32
e_mail_reader_check_state (EMailReader *reader)
{
    MessageList *message_list;
    GPtrArray *uids;
    CamelFolder *folder;
    CamelStore *store = NULL;
    const gchar *folder_uri;
    const gchar *tag;
    gboolean can_clear_flags = FALSE;
    gboolean can_flag_completed = FALSE;
    gboolean can_flag_for_followup = FALSE;
    gboolean has_deleted = FALSE;
    gboolean has_important = FALSE;
    gboolean has_junk = FALSE;
    gboolean has_not_junk = FALSE;
    gboolean has_read = FALSE;
    gboolean has_undeleted = FALSE;
    gboolean has_unimportant = FALSE;
    gboolean has_unread = FALSE;
    gboolean drafts_or_outbox;
    gboolean store_supports_vjunk = FALSE;
    gboolean is_mailing_list;
    guint32 state = 0;
    guint ii;

    g_return_val_if_fail (E_IS_MAIL_READER (reader), 0);

    message_list = e_mail_reader_get_message_list (reader);
    uids = message_list_get_selected (message_list);
    folder_uri = message_list->folder_uri;
    folder = message_list->folder;

    if (folder != NULL) {
        store = CAMEL_STORE (folder->parent_store);
        store_supports_vjunk = (store->flags & CAMEL_STORE_VJUNK);
    }

    drafts_or_outbox =
        em_utils_folder_is_drafts (folder, folder_uri) ||
        em_utils_folder_is_outbox (folder, folder_uri);

    /* Initialize this flag based on whether there are any
     * messages selected.  We will update it in the loop. */
    is_mailing_list = (uids->len > 0);

    for (ii = 0; ii < uids->len; ii++) {
        CamelMessageInfo *info;
        const gchar *string;
        guint32 flags;

        info = camel_folder_get_message_info (
            folder, uids->pdata[ii]);
        if (info == NULL)
            continue;

        flags = camel_message_info_flags (info);

        if (flags & CAMEL_MESSAGE_SEEN)
            has_read = TRUE;
        else
            has_unread = TRUE;

        if (drafts_or_outbox) {
            has_junk = FALSE;
            has_not_junk = FALSE;
        } else if (store_supports_vjunk) {
            guint32 bitmask;

            /* XXX Strictly speaking, this logic is correct.
             *     Problem is there's nothing in the message
             *     list that indicates whether a message is
             *     already marked "Not Junk".  So the user may
             *     think the "Not Junk" button is enabling and
             *     disabling itself randomly as he reads mail. */

            if (flags & CAMEL_MESSAGE_JUNK)
                has_junk = TRUE;
            if (flags & CAMEL_MESSAGE_NOTJUNK)
                has_not_junk = TRUE;

            bitmask = CAMEL_MESSAGE_JUNK | CAMEL_MESSAGE_NOTJUNK;

            /* If neither junk flag is set, the
             * message can be marked either way. */
            if ((flags & bitmask) == 0) {
                has_junk = TRUE;
                has_not_junk = TRUE;
            }

        } else {
            has_junk = TRUE;
            has_not_junk = TRUE;
        }

        if (flags & CAMEL_MESSAGE_DELETED)
            has_deleted = TRUE;
        else
            has_undeleted = TRUE;

        if (flags & CAMEL_MESSAGE_FLAGGED)
            has_important = TRUE;
        else
            has_unimportant = TRUE;

        tag = camel_message_info_user_tag (info, "follow-up");
        if (tag != NULL && *tag != '\0') {
            can_clear_flags = TRUE;
            tag = camel_message_info_user_tag (
                info, "completed-on");
            if (tag != NULL && *tag != '\0')
                can_flag_completed = TRUE;
        } else
            can_flag_for_followup = TRUE;

        string = camel_message_info_mlist (info);
        is_mailing_list &= (string != NULL && *string != '\0');
    }

    if (em_utils_check_user_can_send_mail ())
        state |= E_MAIL_READER_HAVE_ACCOUNT;
    if (uids->len == 1)
        state |= E_MAIL_READER_SELECTION_SINGLE;
    if (uids->len > 1)
        state |= E_MAIL_READER_SELECTION_MULTIPLE;
    if (!drafts_or_outbox && uids->len == 1)
        state |= E_MAIL_READER_SELECTION_CAN_ADD_SENDER;
    if (can_clear_flags)
        state |= E_MAIL_READER_SELECTION_FLAG_CLEAR;
    if (can_flag_completed)
        state |= E_MAIL_READER_SELECTION_FLAG_COMPLETED;
    if (can_flag_for_followup)
        state |= E_MAIL_READER_SELECTION_FLAG_FOLLOWUP;
    if (has_deleted)
        state |= E_MAIL_READER_SELECTION_HAS_DELETED;
    if (has_important)
        state |= E_MAIL_READER_SELECTION_HAS_IMPORTANT;
    if (has_junk)
        state |= E_MAIL_READER_SELECTION_HAS_JUNK;
    if (has_not_junk)
        state |= E_MAIL_READER_SELECTION_HAS_NOT_JUNK;
    if (has_read)
        state |= E_MAIL_READER_SELECTION_HAS_READ;
    if (has_undeleted)
        state |= E_MAIL_READER_SELECTION_HAS_UNDELETED;
    if (has_unimportant)
        state |= E_MAIL_READER_SELECTION_HAS_UNIMPORTANT;
    if (has_unread)
        state |= E_MAIL_READER_SELECTION_HAS_UNREAD;
    if (is_mailing_list)
        state |= E_MAIL_READER_SELECTION_IS_MAILING_LIST;

    em_utils_uids_free (uids);

    return state;

}

void
e_mail_reader_update_actions (EMailReader *reader)
{
    g_return_if_fail (E_IS_MAIL_READER (reader));

    g_signal_emit (reader, signals[UPDATE_ACTIONS], 0);
}

GtkAction *
e_mail_reader_get_action (EMailReader *reader,
                          const gchar *action_name)
{
    GtkActionGroup *action_group;
    GtkAction *action;

    g_return_val_if_fail (E_IS_MAIL_READER (reader), NULL);
    g_return_val_if_fail (action_name != NULL, NULL);

    action_group = e_mail_reader_get_action_group (reader);
    action = gtk_action_group_get_action (action_group, action_name);

    if (action == NULL)
        g_critical (
            "%s: action `%s' not found", G_STRFUNC, action_name);

    return action;
}

GtkActionGroup *
e_mail_reader_get_action_group (EMailReader *reader)
{
    EMailReaderIface *iface;

    g_return_val_if_fail (E_IS_MAIL_READER (reader), NULL);

    iface = E_MAIL_READER_GET_IFACE (reader);
    g_return_val_if_fail (iface->get_action_group != NULL, NULL);

    return iface->get_action_group (reader);
}

gboolean
e_mail_reader_get_hide_deleted (EMailReader *reader)
{
    EMailReaderIface *iface;

    g_return_val_if_fail (E_IS_MAIL_READER (reader), FALSE);

    iface = E_MAIL_READER_GET_IFACE (reader);
    g_return_val_if_fail (iface->get_hide_deleted != NULL, FALSE);

    return iface->get_hide_deleted (reader);
}

EMFormatHTMLDisplay *
e_mail_reader_get_html_display (EMailReader *reader)
{
    EMailReaderIface *iface;

    g_return_val_if_fail (E_IS_MAIL_READER (reader), NULL);

    iface = E_MAIL_READER_GET_IFACE (reader);
    g_return_val_if_fail (iface->get_html_display != NULL, NULL);

    return iface->get_html_display (reader);
}

MessageList *
e_mail_reader_get_message_list (EMailReader *reader)
{
    EMailReaderIface *iface;

    g_return_val_if_fail (E_IS_MAIL_READER (reader), NULL);

    iface = E_MAIL_READER_GET_IFACE (reader);
    g_return_val_if_fail (iface->get_message_list != NULL, NULL);

    return iface->get_message_list (reader);
}

GtkMenu *
e_mail_reader_get_popup_menu (EMailReader *reader)
{
    EMailReaderIface *iface;

    g_return_val_if_fail (E_IS_MAIL_READER (reader), NULL);

    iface = E_MAIL_READER_GET_IFACE (reader);
    g_return_val_if_fail (iface->get_popup_menu != NULL, NULL);

    return iface->get_popup_menu (reader);
}

EShellBackend *
e_mail_reader_get_shell_backend (EMailReader *reader)
{
    EMailReaderIface *iface;

    g_return_val_if_fail (E_IS_MAIL_READER (reader), NULL);

    iface = E_MAIL_READER_GET_IFACE (reader);
    g_return_val_if_fail (iface->get_shell_backend != NULL, NULL);

    return iface->get_shell_backend (reader);
}

GtkWindow *
e_mail_reader_get_window (EMailReader *reader)
{
    EMailReaderIface *iface;

    g_return_val_if_fail (E_IS_MAIL_READER (reader), NULL);

    iface = E_MAIL_READER_GET_IFACE (reader);
    g_return_val_if_fail (iface->get_window != NULL, NULL);

    return iface->get_window (reader);
}

void
e_mail_reader_set_folder (EMailReader *reader,
                          CamelFolder *folder,
                          const gchar *folder_uri)
{
    EMailReaderIface *iface;

    g_return_if_fail (E_IS_MAIL_READER (reader));

    iface = E_MAIL_READER_GET_IFACE (reader);
    g_return_if_fail (iface->set_folder != NULL);

    iface->set_folder (reader, folder, folder_uri);
}

/* Helper for e_mail_reader_set_folder_uri() */
static void
mail_reader_got_folder_cb (gchar *folder_uri,
                           CamelFolder *folder,
                           gpointer user_data)
{
    EMailReader *reader = user_data;

    e_mail_reader_set_folder (reader, folder, folder_uri);
}

void
e_mail_reader_set_folder_uri (EMailReader *reader,
                              const gchar *folder_uri)
{
    g_return_if_fail (E_IS_MAIL_READER (reader));
    g_return_if_fail (folder_uri != NULL);

    /* Fetch the CamelFolder asynchronously. */
    mail_get_folder (
        folder_uri, 0, mail_reader_got_folder_cb,
        reader, mail_msg_fast_ordered_push);
}

void
e_mail_reader_set_message (EMailReader *reader,
                           const gchar *uid)
{
    EMailReaderIface *iface;

    g_return_if_fail (E_IS_MAIL_READER (reader));

    iface = E_MAIL_READER_GET_IFACE (reader);
    g_return_if_fail (iface->set_message != NULL);

    iface->set_message (reader, uid);
}

void
e_mail_reader_create_charset_menu (EMailReader *reader,
                                   GtkUIManager *ui_manager,
                                   guint merge_id)
{
    GtkAction *action;
    const gchar *action_name;
    const gchar *path;
    GSList *list;

    g_return_if_fail (E_IS_MAIL_READER (reader));
    g_return_if_fail (GTK_IS_UI_MANAGER (ui_manager));

    action_name = "mail-charset-default";
    action = e_mail_reader_get_action (reader, action_name);
    g_return_if_fail (action != NULL);

    list = gtk_radio_action_get_group (GTK_RADIO_ACTION (action));
    list = g_slist_copy (list);
    list = g_slist_remove (list, action);
    list = g_slist_sort (list, (GCompareFunc) e_action_compare_by_label);

    path = "/main-menu/view-menu/mail-message-view-actions/mail-encoding-menu";

    while (list != NULL) {
        action = list->data;

        gtk_ui_manager_add_ui (
            ui_manager, merge_id, path,
            gtk_action_get_name (action),
            gtk_action_get_name (action),
            GTK_UI_MANAGER_AUTO, FALSE);

        list = g_slist_delete_link (list, list);
    }

    gtk_ui_manager_ensure_update (ui_manager);
}

void
e_mail_reader_show_search_bar (EMailReader *reader)
{
    g_return_if_fail (E_IS_MAIL_READER (reader));

    g_signal_emit (reader, signals[SHOW_SEARCH_BAR], 0);
}