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/*
 * e-mail-config-defaults-page.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.
 *
 * 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 Lesser General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "e-mail-config-defaults-page.h"

#include <config.h>
#include <glib/gi18n-lib.h>

#include <libebackend/libebackend.h>

#include <mail/e-mail-config-page.h>
#include <mail/em-folder-selection-button.h>

#define E_MAIL_CONFIG_DEFAULTS_PAGE_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_MAIL_CONFIG_DEFAULTS_PAGE, EMailConfigDefaultsPagePrivate))

struct _EMailConfigDefaultsPagePrivate {
    EMailSession *session;
    ESource *account_source;
    ESource *identity_source;

    GtkWidget *drafts_button;  /* not referenced */
    GtkWidget *sent_button;    /* not referenced */
    GtkWidget *replies_toggle; /* not referenced */
    GtkWidget *trash_toggle;   /* not referenced */
    GtkWidget *junk_toggle;    /* not referenced */
};

enum {
    PROP_0,
    PROP_ACCOUNT_SOURCE,
    PROP_IDENTITY_SOURCE,
    PROP_SESSION
};

/* Forward Declarations */
static void e_mail_config_defaults_page_interface_init
                    (EMailConfigPageInterface *iface);

G_DEFINE_TYPE_WITH_CODE (
    EMailConfigDefaultsPage,
    e_mail_config_defaults_page,
    GTK_TYPE_BOX,
    G_IMPLEMENT_INTERFACE (
        E_TYPE_EXTENSIBLE, NULL)
    G_IMPLEMENT_INTERFACE (
        E_TYPE_MAIL_CONFIG_PAGE,
        e_mail_config_defaults_page_interface_init))

static CamelSettings *
mail_config_defaults_page_maybe_get_settings (EMailConfigDefaultsPage *page)
{
    ESource *source;
    ESourceCamel *camel_ext;
    ESourceBackend *backend_ext;
    const gchar *backend_name;
    const gchar *extension_name;

    source = e_mail_config_defaults_page_get_account_source (page);

    extension_name = E_SOURCE_EXTENSION_MAIL_ACCOUNT;
    backend_ext = e_source_get_extension (source, extension_name);
    backend_name = e_source_backend_get_backend_name (backend_ext);
    extension_name = e_source_camel_get_extension_name (backend_name);

    /* Avoid accidentally creating a backend-specific extension
     * in the mail account source if the mail account source is
     * part of a collection, in which case the backend-specific
     * extension is kept in the top-level collection source. */
    if (!e_source_has_extension (source, extension_name))
        return NULL;

    camel_ext = e_source_get_extension (source, extension_name);

    return e_source_camel_get_settings (camel_ext);
}

static CamelStore *
mail_config_defaults_page_ref_store (EMailConfigDefaultsPage *page)
{
    ESource *source;
    EMailSession *session;
    CamelService *service;
    const gchar *uid;

    session = e_mail_config_defaults_page_get_session (page);
    source = e_mail_config_defaults_page_get_account_source (page);

    uid = e_source_get_uid (source);
    service = camel_session_ref_service (CAMEL_SESSION (session), uid);

    if (service == NULL)
        return NULL;

    if (!CAMEL_IS_STORE (service)) {
        g_object_unref (service);
        return NULL;
    }

    return CAMEL_STORE (service);
}

static gboolean
mail_config_defaults_page_addrs_to_string (GBinding *binding,
                                           const GValue *source_value,
                                           GValue *target_value,
                                           gpointer unused)
{
    gchar **strv;

    strv = g_value_dup_boxed (source_value);

    if (strv != NULL) {
        gchar *string = g_strjoinv ("; ", strv);
        g_value_set_string (target_value, string);
        g_free (string);
    } else {
        g_value_set_string (target_value, "");
    }

    g_strfreev (strv);

    return TRUE;
}

static gboolean
mail_config_defaults_page_string_to_addrs (GBinding *binding,
                                           const GValue *source_value,
                                           GValue *target_value,
                                           gpointer unused)
{
    CamelInternetAddress *address;
    const gchar *string;
    gchar **strv;
    gint n_addresses, ii;

    string = g_value_get_string (source_value);

    address = camel_internet_address_new ();
    n_addresses = camel_address_decode (CAMEL_ADDRESS (address), string);

    if (n_addresses < 0) {
        g_object_unref (address);
        return FALSE;

    } else if (n_addresses == 0) {
        g_value_set_boxed (target_value, NULL);
        g_object_unref (address);
        return TRUE;
    }

    strv = g_new0 (gchar *, n_addresses + 1);

    for (ii = 0; ii < n_addresses; ii++) {
        const gchar *name = NULL;
        const gchar *addr = NULL;

        camel_internet_address_get (address, ii, &name, &addr);
        strv[ii] = camel_internet_address_format_address (name, addr);
    }

    g_value_take_boxed (target_value, strv);

    return TRUE;
}

static gboolean
mail_config_defaults_page_folder_name_to_uri (GBinding *binding,
                                              const GValue *source_value,
                                              GValue *target_value,
                                              gpointer data)
{
    EMailConfigDefaultsPage *page;
    CamelStore *store;
    const gchar *folder_name;
    gchar *folder_uri = NULL;

    page = E_MAIL_CONFIG_DEFAULTS_PAGE (data);
    store = mail_config_defaults_page_ref_store (page);
    g_return_val_if_fail (store != NULL, FALSE);

    folder_name = g_value_get_string (source_value);

    if (folder_name != NULL)
        folder_uri = e_mail_folder_uri_build (store, folder_name);

    g_value_set_string (target_value, folder_uri);

    g_free (folder_uri);

    g_object_unref (store);

    return TRUE;
}

static gboolean
mail_config_defaults_page_folder_uri_to_name (GBinding *binding,
                                              const GValue *source_value,
                                              GValue *target_value,
                                              gpointer data)
{
    EMailConfigDefaultsPage *page;
    EMailSession *session;
    const gchar *folder_uri;
    gchar *folder_name = NULL;
    GError *error = NULL;

    page = E_MAIL_CONFIG_DEFAULTS_PAGE (data);
    session = e_mail_config_defaults_page_get_session (page);

    folder_uri = g_value_get_string (source_value);

    if (folder_uri == NULL) {
        g_value_set_string (target_value, NULL);
        return TRUE;
    }

    e_mail_folder_uri_parse (
        CAMEL_SESSION (session), folder_uri,
        NULL, &folder_name, &error);

    if (error != NULL) {
        g_warn_if_fail (folder_name == NULL);
        g_warning ("%s: %s", G_STRFUNC, error->message);
        g_error_free (error);
        return FALSE;
    }

    g_return_val_if_fail (folder_name != NULL, FALSE);

    g_value_set_string (target_value, folder_name);

    g_free (folder_name);

    return TRUE;
}

static void
mail_config_defaults_page_restore_folders (EMailConfigDefaultsPage *page)
{
    EMFolderSelectionButton *button;
    EMailSession *session;
    EMailLocalFolder type;
    const gchar *folder_uri;

    session = e_mail_config_defaults_page_get_session (page);

    type = E_MAIL_LOCAL_FOLDER_DRAFTS;
    button = EM_FOLDER_SELECTION_BUTTON (page->priv->drafts_button);
    folder_uri = e_mail_session_get_local_folder_uri (session, type);
    em_folder_selection_button_set_folder_uri (button, folder_uri);

    if (gtk_widget_is_sensitive (page->priv->sent_button)) {
        type = E_MAIL_LOCAL_FOLDER_SENT;
        button = EM_FOLDER_SELECTION_BUTTON (page->priv->sent_button);
        folder_uri = e_mail_session_get_local_folder_uri (session, type);
        em_folder_selection_button_set_folder_uri (button, folder_uri);

        gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (page->priv->replies_toggle), FALSE);
    }
}

static void
mail_config_defaults_page_restore_real_folder (GtkToggleButton *toggle_button)
{
    gtk_toggle_button_set_active (toggle_button, FALSE);
}

static GtkWidget *
mail_config_defaults_page_add_real_folder (EMailConfigDefaultsPage *page,
                                           GtkSizeGroup *size_group,
                                           GtkButton *revert_button,
                                           const gchar *toggle_label,
                                           const gchar *dialog_caption,
                                           const gchar *property_name,
                                           const gchar *use_property_name)
{
    GtkWidget *box;
    GtkWidget *check_button;
    GtkWidget *folder_button;
    EMailSession *session;
    CamelSettings *settings;
    CamelStore *store;
    GObjectClass *class;

    session = e_mail_config_defaults_page_get_session (page);
    settings = mail_config_defaults_page_maybe_get_settings (page);

    if (settings == NULL)
        return NULL;

    /* These folder settings are backend-specific, so check if
     * the CamelSettings class has the property names we need. */

    class = G_OBJECT_GET_CLASS (settings);

    if (g_object_class_find_property (class, property_name) == NULL)
        return NULL;

    if (g_object_class_find_property (class, use_property_name) == NULL)
        return NULL;

    store = mail_config_defaults_page_ref_store (page);
    g_return_val_if_fail (store != NULL, NULL);

    /* We're good to go. */

    box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);

    check_button = gtk_check_button_new_with_mnemonic (toggle_label);
    g_object_set (check_button, "xalign", 1.0, NULL);
    gtk_size_group_add_widget (size_group, check_button);
    gtk_box_pack_start (GTK_BOX (box), check_button, FALSE, FALSE, 0);
    gtk_widget_show (check_button);

    g_object_bind_property (
        settings, use_property_name,
        check_button, "active",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE);

    folder_button = em_folder_selection_button_new (
        session, "", dialog_caption);
    em_folder_selection_button_set_store (
        EM_FOLDER_SELECTION_BUTTON (folder_button), store);
    gtk_box_pack_start (GTK_BOX (box), folder_button, TRUE, TRUE, 0);
    gtk_widget_show (folder_button);

    /* XXX CamelSettings only stores the folder's path name, but the
     *     EMFolderSelectionButton requires a full folder URI, so we
     *     have to do some fancy transforms for the binding to work. */
    g_object_bind_property_full (
        settings, property_name,
        folder_button, "folder-uri",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE,
        mail_config_defaults_page_folder_name_to_uri,
        mail_config_defaults_page_folder_uri_to_name,
        g_object_ref (page),
        (GDestroyNotify) g_object_unref);

    g_object_bind_property (
        check_button, "active",
        folder_button, "sensitive",
        G_BINDING_SYNC_CREATE);

    g_signal_connect_swapped (
        revert_button, "clicked",
        G_CALLBACK (mail_config_defaults_page_restore_real_folder),
        check_button);

    g_object_unref (store);

    return box;
}

static void
mail_config_defaults_page_set_account_source (EMailConfigDefaultsPage *page,
                                              ESource *account_source)
{
    g_return_if_fail (E_IS_SOURCE (account_source));
    g_return_if_fail (page->priv->account_source == NULL);

    page->priv->account_source = g_object_ref (account_source);
}

static void
mail_config_defaults_page_set_identity_source (EMailConfigDefaultsPage *page,
                                               ESource *identity_source)
{
    g_return_if_fail (E_IS_SOURCE (identity_source));
    g_return_if_fail (page->priv->identity_source == NULL);

    page->priv->identity_source = g_object_ref (identity_source);
}

static void
mail_config_defaults_page_set_session (EMailConfigDefaultsPage *page,
                                       EMailSession *session)
{
    g_return_if_fail (E_IS_MAIL_SESSION (session));
    g_return_if_fail (page->priv->session == NULL);

    page->priv->session = g_object_ref (session);
}

static void
mail_config_defaults_page_set_property (GObject *object,
                                        guint property_id,
                                        const GValue *value,
                                        GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_ACCOUNT_SOURCE:
            mail_config_defaults_page_set_account_source (
                E_MAIL_CONFIG_DEFAULTS_PAGE (object),
                g_value_get_object (value));
            return;

        case PROP_IDENTITY_SOURCE:
            mail_config_defaults_page_set_identity_source (
                E_MAIL_CONFIG_DEFAULTS_PAGE (object),
                g_value_get_object (value));
            return;

        case PROP_SESSION:
            mail_config_defaults_page_set_session (
                E_MAIL_CONFIG_DEFAULTS_PAGE (object),
                g_value_get_object (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
mail_config_defaults_page_get_property (GObject *object,
                                        guint property_id,
                                        GValue *value,
                                        GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_ACCOUNT_SOURCE:
            g_value_set_object (
                value,
                e_mail_config_defaults_page_get_account_source (
                E_MAIL_CONFIG_DEFAULTS_PAGE (object)));
            return;

        case PROP_IDENTITY_SOURCE:
            g_value_set_object (
                value,
                e_mail_config_defaults_page_get_identity_source (
                E_MAIL_CONFIG_DEFAULTS_PAGE (object)));
            return;

        case PROP_SESSION:
            g_value_set_object (
                value,
                e_mail_config_defaults_page_get_session (
                E_MAIL_CONFIG_DEFAULTS_PAGE (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
mail_config_defaults_page_dispose (GObject *object)
{
    EMailConfigDefaultsPagePrivate *priv;

    priv = E_MAIL_CONFIG_DEFAULTS_PAGE_GET_PRIVATE (object);

    if (priv->identity_source != NULL) {
        g_object_unref (priv->identity_source);
        priv->identity_source = NULL;
    }

    if (priv->session != NULL) {
        g_object_unref (priv->session);
        priv->session = NULL;
    }

    /* Chain up to parent's dispose() method. */
    G_OBJECT_CLASS (e_mail_config_defaults_page_parent_class)->
        dispose (object);
}

static void
mail_config_defaults_page_constructed (GObject *object)
{
    EMailConfigDefaultsPage *page;
    EMailSession *session;
    ESource *source;
    ESourceBackend *account_ext;
    ESourceMailComposition *composition_ext;
    ESourceMailSubmission *submission_ext;
    ESourceMDN *mdn_ext;
    GtkLabel *label;
    GtkButton *button;
    GtkWidget *widget;
    GtkWidget *container;
    GtkSizeGroup *size_group;
    GEnumClass *enum_class;
    GEnumValue *enum_value;
    EMdnResponsePolicy policy;
    CamelProvider *provider = NULL;
    const gchar *extension_name;
    const gchar *text;
    gchar *markup;

    page = E_MAIL_CONFIG_DEFAULTS_PAGE (object);

    /* Chain up to parent's constructed() method. */
    G_OBJECT_CLASS (e_mail_config_defaults_page_parent_class)->constructed (object);

    source = e_mail_config_defaults_page_get_account_source (page);
    extension_name = E_SOURCE_EXTENSION_MAIL_ACCOUNT;
    account_ext = e_source_get_extension (source, extension_name);
    if (e_source_backend_get_backend_name (account_ext))
        provider = camel_provider_get (e_source_backend_get_backend_name (account_ext), NULL);

    session = e_mail_config_defaults_page_get_session (page);
    source = e_mail_config_defaults_page_get_identity_source (page);

    extension_name = E_SOURCE_EXTENSION_MAIL_COMPOSITION;
    composition_ext = e_source_get_extension (source, extension_name);

    extension_name = E_SOURCE_EXTENSION_MAIL_SUBMISSION;
    submission_ext = e_source_get_extension (source, extension_name);

    extension_name = E_SOURCE_EXTENSION_MDN;
    mdn_ext = e_source_get_extension (source, extension_name);

    gtk_orientable_set_orientation (
        GTK_ORIENTABLE (page), GTK_ORIENTATION_VERTICAL);

    gtk_box_set_spacing (GTK_BOX (page), 12);

    size_group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);

    /*** Special Folders ***/

    widget = gtk_grid_new ();
    gtk_grid_set_row_spacing (GTK_GRID (widget), 6);
    gtk_grid_set_column_spacing (GTK_GRID (widget), 6);
    gtk_box_pack_start (GTK_BOX (page), widget, FALSE, FALSE, 0);
    gtk_widget_show (widget);

    container = widget;

    text = _("Special Folders");
    markup = g_markup_printf_escaped ("<b>%s</b>", text);
    widget = gtk_label_new (markup);
    gtk_label_set_use_markup (GTK_LABEL (widget), TRUE);
    gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5);
    gtk_grid_attach (GTK_GRID (container), widget, 0, 0, 2, 1);
    gtk_widget_show (widget);
    g_free (markup);

    text = _("Draft Messages _Folder:");
    widget = gtk_label_new_with_mnemonic (text);
    gtk_widget_set_margin_left (widget, 12);
    gtk_size_group_add_widget (size_group, widget);
    gtk_misc_set_alignment (GTK_MISC (widget), 1.0, 0.5);
    gtk_grid_attach (GTK_GRID (container), widget, 0, 1, 1, 1);
    gtk_widget_show (widget);

    label = GTK_LABEL (widget);

    text = _("Choose a folder for saving draft messages.");
    widget = em_folder_selection_button_new (session, "", text);
    gtk_widget_set_hexpand (widget, TRUE);
    gtk_label_set_mnemonic_widget (label, widget);
    gtk_grid_attach (GTK_GRID (container), widget, 1, 1, 1, 1);
    page->priv->drafts_button = widget;  /* not referenced */
    gtk_widget_show (widget);

    e_binding_bind_object_text_property (
        composition_ext, "drafts-folder",
        widget, "folder-uri",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE);

    text = _("Sent _Messages Folder:");
    widget = gtk_label_new_with_mnemonic (text);
    gtk_widget_set_margin_left (widget, 12);
    gtk_size_group_add_widget (size_group, widget);
    gtk_misc_set_alignment (GTK_MISC (widget), 1.0, 0.5);
    gtk_grid_attach (GTK_GRID (container), widget, 0, 2, 1, 1);
    gtk_widget_show (widget);

    label = GTK_LABEL (widget);

    text = _("Choose a folder for saving sent messages.");
    widget = em_folder_selection_button_new (session, "", text);
    gtk_widget_set_hexpand (widget, TRUE);
    gtk_label_set_mnemonic_widget (label, widget);
    gtk_grid_attach (GTK_GRID (container), widget, 1, 2, 1, 1);
    page->priv->sent_button = widget;  /* not referenced */
    gtk_widget_show (widget);

    if (provider && (provider->flags & CAMEL_PROVIDER_DISABLE_SENT_FOLDER) != 0) {
        gtk_widget_set_sensitive (GTK_WIDGET (label), FALSE);
        gtk_widget_set_sensitive (widget, FALSE);
    }

    e_binding_bind_object_text_property (
        submission_ext, "sent-folder",
        widget, "folder-uri",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE);

    widget = gtk_check_button_new_with_mnemonic (_("S_ave replies in the folder of the message being replied to"));
    g_object_set (widget, "xalign", 0.0, NULL);
    gtk_widget_set_halign (widget, GTK_ALIGN_START);
    gtk_grid_attach (GTK_GRID (container), widget, 0, 3, 2, 1);
    page->priv->replies_toggle = widget; /* not referenced */
    gtk_widget_show (widget);

    if (provider && (provider->flags & CAMEL_PROVIDER_DISABLE_SENT_FOLDER) != 0) {
        gtk_widget_set_sensitive (widget, FALSE);
    }

    g_object_bind_property (
        submission_ext, "replies-to-origin-folder",
        widget, "active",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE);

    widget = gtk_button_new_with_mnemonic (_("_Restore Defaults"));
    gtk_widget_set_halign (widget, GTK_ALIGN_START);
    gtk_grid_attach (GTK_GRID (container), widget, 1, 6, 1, 1);
    gtk_widget_show (widget);

    g_signal_connect_swapped (
        widget, "clicked",
        G_CALLBACK (mail_config_defaults_page_restore_folders),
        page);

    button = GTK_BUTTON (widget);

    widget = mail_config_defaults_page_add_real_folder (
        page, size_group, button,
        _("Use a Real Folder for _Trash:"),
        _("Choose a folder for deleted messages."),
        "real-trash-path", "use-real-trash-path");
    if (widget != NULL) {
        gtk_grid_attach (GTK_GRID (container), widget, 0, 4, 2, 1);
        gtk_widget_show (widget);
    }

    widget = mail_config_defaults_page_add_real_folder (
        page, size_group, button,
        _("Use a Real Folder for _Junk:"),
        _("Choose a folder for junk messages."),
        "real-junk-path", "use-real-junk-path");
    if (widget != NULL) {
        gtk_grid_attach (GTK_GRID (container), widget, 0, 5, 2, 1);
        gtk_widget_show (widget);
    }

    /*** Composing Messages ***/

    widget = gtk_grid_new ();
    gtk_grid_set_row_spacing (GTK_GRID (widget), 6);
    gtk_grid_set_column_spacing (GTK_GRID (widget), 6);
    gtk_box_pack_start (GTK_BOX (page), widget, FALSE, FALSE, 0);
    gtk_widget_show (widget);

    container = widget;

    text = _("Composing Messages");
    markup = g_markup_printf_escaped ("<b>%s</b>", text);
    widget = gtk_label_new (markup);
    gtk_label_set_use_markup (GTK_LABEL (widget), TRUE);
    gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5);
    gtk_grid_attach (GTK_GRID (container), widget, 0, 0, 1, 1);
    gtk_widget_show (widget);
    g_free (markup);

    text = _("Alway_s carbon-copy (cc) to:");
    widget = gtk_label_new_with_mnemonic (text);
    gtk_widget_set_margin_left (widget, 12);
    gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5);
    gtk_grid_attach (GTK_GRID (container), widget, 0, 1, 1, 1);
    gtk_widget_show (widget);

    label = GTK_LABEL (widget);

    widget = gtk_entry_new ();
    gtk_widget_set_hexpand (widget, TRUE);
    gtk_widget_set_margin_left (widget, 12);
    gtk_label_set_mnemonic_widget (label, widget);
    gtk_grid_attach (GTK_GRID (container), widget, 0, 2, 1, 1);
    gtk_widget_show (widget);

    g_object_bind_property_full (
        composition_ext, "cc",
        widget, "text",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE,
        mail_config_defaults_page_addrs_to_string,
        mail_config_defaults_page_string_to_addrs,
        NULL, (GDestroyNotify) NULL);

    text = _("Always _blind carbon-copy (bcc) to:");
    widget = gtk_label_new_with_mnemonic (text);
    gtk_widget_set_margin_left (widget, 12);
    gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5);
    gtk_grid_attach (GTK_GRID (container), widget, 0, 3, 1, 1);
    gtk_widget_show (widget);

    label = GTK_LABEL (widget);

    widget = gtk_entry_new ();
    gtk_widget_set_hexpand (widget, TRUE);
    gtk_widget_set_margin_left (widget, 12);
    gtk_label_set_mnemonic_widget (label, widget);
    gtk_grid_attach (GTK_GRID (container), widget, 0, 4, 1, 1);
    gtk_widget_show (widget);

    g_object_bind_property_full (
        composition_ext, "bcc",
        widget, "text",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE,
        mail_config_defaults_page_addrs_to_string,
        mail_config_defaults_page_string_to_addrs,
        NULL, (GDestroyNotify) NULL);

    /*** Message Receipts ***/

    widget = gtk_grid_new ();
    gtk_grid_set_row_spacing (GTK_GRID (widget), 6);
    gtk_grid_set_column_spacing (GTK_GRID (widget), 6);
    gtk_box_pack_start (GTK_BOX (page), widget, FALSE, FALSE, 0);
    gtk_widget_show (widget);

    container = widget;

    text = _("Message Receipts");
    markup = g_markup_printf_escaped ("<b>%s</b>", text);
    widget = gtk_label_new (markup);
    gtk_label_set_use_markup (GTK_LABEL (widget), TRUE);
    gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5);
    gtk_grid_attach (GTK_GRID (container), widget, 0, 0, 2, 1);
    gtk_widget_show (widget);
    g_free (markup);

    text = _("S_end message receipts:");
    widget = gtk_label_new_with_mnemonic (text);
    gtk_widget_set_margin_left (widget, 12);
    gtk_size_group_add_widget (size_group, widget);
    gtk_misc_set_alignment (GTK_MISC (widget), 1.0, 0.5);
    gtk_grid_attach (GTK_GRID (container), widget, 0, 1, 1, 1);
    gtk_widget_show (widget);

    label = GTK_LABEL (widget);

    widget = gtk_combo_box_text_new ();
    gtk_widget_set_hexpand (widget, TRUE);
    gtk_label_set_mnemonic_widget (label, widget);
    gtk_grid_attach (GTK_GRID (container), widget, 1, 1, 1, 1);
    gtk_widget_show (widget);

    /* XXX This is a pain in the butt, but we want to avoid hard-coding
     *     string values from the EMdnResponsePolicy enum class in case
     *     they change in the future. */
    enum_class = g_type_class_ref (E_TYPE_MDN_RESPONSE_POLICY);
    policy = E_MDN_RESPONSE_POLICY_NEVER;
    enum_value = g_enum_get_value (enum_class, policy);
    g_return_if_fail (enum_value != NULL);
    gtk_combo_box_text_append (
        GTK_COMBO_BOX_TEXT (widget),
        enum_value->value_nick, _("Never"));
    policy = E_MDN_RESPONSE_POLICY_ALWAYS;
    enum_value = g_enum_get_value (enum_class, policy);
    g_return_if_fail (enum_value != NULL);
    gtk_combo_box_text_append (
        GTK_COMBO_BOX_TEXT (widget),
        enum_value->value_nick, _("Always"));
    policy = E_MDN_RESPONSE_POLICY_ASK;
    enum_value = g_enum_get_value (enum_class, policy);
    g_return_if_fail (enum_value != NULL);
    gtk_combo_box_text_append (
        GTK_COMBO_BOX_TEXT (widget),
        enum_value->value_nick, _("Ask for each message"));
    g_type_class_unref (enum_class);

    g_object_bind_property_full (
        mdn_ext, "response-policy",
        widget, "active-id",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE,
        e_binding_transform_enum_value_to_nick,
        e_binding_transform_enum_nick_to_value,
        NULL, (GDestroyNotify) NULL);

    g_object_unref (size_group);

    e_extensible_load_extensions (E_EXTENSIBLE (page));
}

static void
e_mail_config_defaults_page_class_init (EMailConfigDefaultsPageClass *class)
{
    GObjectClass *object_class;

    g_type_class_add_private (
        class, sizeof (EMailConfigDefaultsPagePrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = mail_config_defaults_page_set_property;
    object_class->get_property = mail_config_defaults_page_get_property;
    object_class->dispose = mail_config_defaults_page_dispose;
    object_class->constructed = mail_config_defaults_page_constructed;

    g_object_class_install_property (
        object_class,
        PROP_ACCOUNT_SOURCE,
        g_param_spec_object (
            "account-source",
            "Account Source",
            "Mail account source being edited",
            E_TYPE_SOURCE,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_IDENTITY_SOURCE,
        g_param_spec_object (
            "identity-source",
            "Identity Source",
            "Mail identity source being edited",
            E_TYPE_SOURCE,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_SESSION,
        g_param_spec_object (
            "session",
            "Session",
            "Mail session",
            E_TYPE_MAIL_SESSION,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY |
            G_PARAM_STATIC_STRINGS));
}

static void
e_mail_config_defaults_page_interface_init (EMailConfigPageInterface *iface)
{
    iface->title = _("Defaults");
    iface->sort_order = E_MAIL_CONFIG_DEFAULTS_PAGE_SORT_ORDER;
}

static void
e_mail_config_defaults_page_init (EMailConfigDefaultsPage *page)
{
    page->priv = E_MAIL_CONFIG_DEFAULTS_PAGE_GET_PRIVATE (page);
}

EMailConfigPage *
e_mail_config_defaults_page_new (EMailSession *session,
                                 ESource *account_source,
                                 ESource *identity_source)
{
    g_return_val_if_fail (E_IS_MAIL_SESSION (session), NULL);
    g_return_val_if_fail (E_IS_SOURCE (account_source), NULL);
    g_return_val_if_fail (E_IS_SOURCE (identity_source), NULL);

    return g_object_new (
        E_TYPE_MAIL_CONFIG_DEFAULTS_PAGE,
        "account-source", account_source,
        "identity-source", identity_source,
        "session", session, NULL);
}

EMailSession *
e_mail_config_defaults_page_get_session (EMailConfigDefaultsPage *page)
{
    g_return_val_if_fail (E_IS_MAIL_CONFIG_DEFAULTS_PAGE (page), NULL);

    return page->priv->session;
}

ESource *
e_mail_config_defaults_page_get_account_source (EMailConfigDefaultsPage *page)
{
    g_return_val_if_fail (E_IS_MAIL_CONFIG_DEFAULTS_PAGE (page), NULL);

    return page->priv->account_source;
}

ESource *
e_mail_config_defaults_page_get_identity_source (EMailConfigDefaultsPage *page)
{
    g_return_val_if_fail (E_IS_MAIL_CONFIG_DEFAULTS_PAGE (page), NULL);

    return page->priv->identity_source;
}