path: root/composer/e-composer-header-table.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)
 */

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

#include "e-composer-header-table.h"

#include <glib/gi18n-lib.h>

#include <shell/e-shell.h>

#include "e-msg-composer.h"
#include "e-composer-private.h"
#include "e-composer-from-header.h"
#include "e-composer-name-header.h"
#include "e-composer-post-header.h"
#include "e-composer-spell-header.h"
#include "e-composer-text-header.h"

#define E_COMPOSER_HEADER_TABLE_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_COMPOSER_HEADER_TABLE, EComposerHeaderTablePrivate))

#define HEADER_TOOLTIP_TO \
    _("Enter the recipients of the message")
#define HEADER_TOOLTIP_CC \
    _("Enter the addresses that will receive a " \
      "carbon copy of the message")
#define HEADER_TOOLTIP_BCC \
    _("Enter the addresses that will receive a " \
      "carbon copy of the message without appearing " \
      "in the recipient list of the message")

struct _EComposerHeaderTablePrivate {
    EComposerHeader *headers[E_COMPOSER_NUM_HEADERS];
    GtkWidget *signature_label;
    GtkWidget *signature_combo_box;
    ENameSelector *name_selector;
    ESourceRegistry *registry;
    EShell *shell;
};

enum {
    PROP_0,
    PROP_DESTINATIONS_BCC,
    PROP_DESTINATIONS_CC,
    PROP_DESTINATIONS_TO,
    PROP_IDENTITY_UID,
    PROP_POST_TO,
    PROP_REGISTRY,
    PROP_REPLY_TO,
    PROP_SHELL,
    PROP_SIGNATURE_COMBO_BOX,
    PROP_SIGNATURE_UID,
    PROP_SUBJECT
};

G_DEFINE_TYPE (
    EComposerHeaderTable,
    e_composer_header_table,
    GTK_TYPE_TABLE)

static void
g_value_set_destinations (GValue *value,
                          EDestination **destinations)
{
    GPtrArray *array;
    gint ii;

    /* Preallocate some reasonable number. */
    array = g_ptr_array_new_full (64, g_object_unref);

    for (ii = 0; destinations[ii] != NULL; ii++) {
        g_ptr_array_add (array, e_destination_copy (destinations[ii]));
    }

    g_value_take_boxed (value, array);
}

static EDestination **
g_value_dup_destinations (const GValue *value)
{
    EDestination **destinations;
    const EDestination *dest;
    GPtrArray *array;
    guint ii;

    array = g_value_get_boxed (value);
    destinations = g_new0 (EDestination *, array->len + 1);

    for (ii = 0; ii < array->len; ii++) {
        dest = g_ptr_array_index (array, ii);
        destinations[ii] = e_destination_copy (dest);
    }

    return destinations;
}

static void
g_value_set_string_list (GValue *value,
                         GList *list)
{
    GPtrArray *array;

    array = g_ptr_array_new_full (g_list_length (list), g_free);

    while (list != NULL) {
        g_ptr_array_add (array, g_strdup (list->data));
        list = list->next;
    }

    g_value_take_boxed (value, array);
}

static GList *
g_value_dup_string_list (const GValue *value)
{
    GPtrArray *array;
    GList *list = NULL;
    gint ii;

    array = g_value_get_boxed (value);

    for (ii = 0; ii < array->len; ii++) {
        const gchar *element = g_ptr_array_index (array, ii);
        list = g_list_prepend (list, g_strdup (element));
    }

    return g_list_reverse (list);
}

static void
composer_header_table_notify_header (EComposerHeader *header,
                                     const gchar *property_name)
{
    GtkWidget *parent;

    parent = gtk_widget_get_parent (header->input_widget);
    g_return_if_fail (E_IS_COMPOSER_HEADER_TABLE (parent));
    g_object_notify (G_OBJECT (parent), property_name);
}

static void
composer_header_table_notify_widget (GtkWidget *widget,
                                     const gchar *property_name)
{
    GtkWidget *parent;

    parent = gtk_widget_get_parent (widget);
    g_return_if_fail (E_IS_COMPOSER_HEADER_TABLE (parent));
    g_object_notify (G_OBJECT (parent), property_name);
}

static void
composer_header_table_bind_header (const gchar *property_name,
                                   const gchar *signal_name,
                                   EComposerHeader *header)
{
    /* Propagate the signal as "notify::property_name". */

    g_signal_connect (
        header, signal_name,
        G_CALLBACK (composer_header_table_notify_header),
        (gpointer) property_name);
}

static void
composer_header_table_bind_widget (const gchar *property_name,
                                   const gchar *signal_name,
                                   GtkWidget *widget)
{
    /* Propagate the signal as "notify::property_name". */

    g_signal_connect (
        widget, signal_name,
        G_CALLBACK (composer_header_table_notify_widget),
        (gpointer) property_name);
}

static EDestination **
composer_header_table_update_destinations (EDestination **old_destinations,
                                           const gchar * const *auto_addresses)
{
    CamelAddress *address;
    CamelInternetAddress *inet_address;
    EDestination **new_destinations;
    EDestination *destination;
    GQueue queue = G_QUEUE_INIT;
    guint length;
    gint ii;

    /* Include automatic recipients for the selected account. */

    if (auto_addresses == NULL)
        goto skip_auto;

    inet_address = camel_internet_address_new ();
    address = CAMEL_ADDRESS (inet_address);

    /* XXX Calling camel_address_decode() multiple times on the same
     *     CamelInternetAddress has a cumulative effect, which isn't
     *     well documented. */
    for (ii = 0; auto_addresses[ii] != NULL; ii++)
        camel_address_decode (address, auto_addresses[ii]);

    for (ii = 0; ii < camel_address_length (address); ii++) {
        const gchar *name, *email;

        if (!camel_internet_address_get (
            inet_address, ii, &name, &email))
            continue;

        destination = e_destination_new ();
        e_destination_set_auto_recipient (destination, TRUE);

        if (name != NULL)
            e_destination_set_name (destination, name);

        if (email != NULL)
            e_destination_set_email (destination, email);

        g_queue_push_tail (&queue, destination);
    }

    g_object_unref (inet_address);

skip_auto:

    /* Include custom recipients for this message. */

    if (old_destinations == NULL)
        goto skip_custom;

    for (ii = 0; old_destinations[ii] != NULL; ii++) {
        if (e_destination_is_auto_recipient (old_destinations[ii]))
            continue;

        destination = e_destination_copy (old_destinations[ii]);
        g_queue_push_tail (&queue, destination);
    }

skip_custom:

    length = g_queue_get_length (&queue);
    new_destinations = g_new0 (EDestination *, length + 1);

    for (ii = 0; ii < length; ii++)
        new_destinations[ii] = g_queue_pop_head (&queue);

    /* Sanity check. */
    g_warn_if_fail (g_queue_is_empty (&queue));

    return new_destinations;
}

static void
composer_header_table_setup_mail_headers (EComposerHeaderTable *table)
{
    GSettings *settings;
    gint ii;

    settings = g_settings_new ("org.gnome.evolution.mail");

    for (ii = 0; ii < E_COMPOSER_NUM_HEADERS; ii++) {
        EComposerHeader *header;
        const gchar *key;
        gboolean sensitive;
        gboolean visible;

        header = e_composer_header_table_get_header (table, ii);

        switch (ii) {
            case E_COMPOSER_HEADER_BCC:
                key = "composer-show-bcc";
                break;

            case E_COMPOSER_HEADER_CC:
                key = "composer-show-cc";
                break;

            case E_COMPOSER_HEADER_REPLY_TO:
                key = "composer-show-reply-to";
                break;

            default:
                key = NULL;
                break;
        }

        if (key != NULL)
            g_settings_unbind (header, "visible");

        switch (ii) {
            case E_COMPOSER_HEADER_FROM:
                sensitive = TRUE;
                visible = TRUE;
                break;

            case E_COMPOSER_HEADER_BCC:
            case E_COMPOSER_HEADER_CC:
            case E_COMPOSER_HEADER_REPLY_TO:
            case E_COMPOSER_HEADER_SUBJECT:
            case E_COMPOSER_HEADER_TO:
                sensitive = TRUE;
                visible = TRUE;
                break;

            default:
                sensitive = FALSE;
                visible = FALSE;
                break;
        }

        e_composer_header_set_sensitive (header, sensitive);
        e_composer_header_set_visible (header, visible);

        if (key != NULL)
            g_settings_bind (
                settings, key,
                header, "visible",
                G_SETTINGS_BIND_DEFAULT);
    }

    g_object_unref (settings);
}

static void
composer_header_table_setup_post_headers (EComposerHeaderTable *table)
{
    GSettings *settings;
    gint ii;

    settings = g_settings_new ("org.gnome.evolution.mail");

    for (ii = 0; ii < E_COMPOSER_NUM_HEADERS; ii++) {
        EComposerHeader *header;
        const gchar *key;

        header = e_composer_header_table_get_header (table, ii);

        switch (ii) {
            case E_COMPOSER_HEADER_FROM:
                key = "composer-show-post-from";
                break;

            case E_COMPOSER_HEADER_REPLY_TO:
                key = "composer-show-post-reply-to";
                break;

            default:
                key = NULL;
                break;
        }

        if (key != NULL)
            g_settings_unbind (header, "visible");

        switch (ii) {
            case E_COMPOSER_HEADER_FROM:
            case E_COMPOSER_HEADER_POST_TO:
            case E_COMPOSER_HEADER_REPLY_TO:
            case E_COMPOSER_HEADER_SUBJECT:
                e_composer_header_set_sensitive (header, TRUE);
                e_composer_header_set_visible (header, TRUE);
                break;

            default:  /* this includes TO, CC and BCC */
                e_composer_header_set_sensitive (header, FALSE);
                e_composer_header_set_visible (header, FALSE);
                break;
        }

        if (key != NULL)
            g_settings_bind (
                settings, key,
                header, "visible",
                G_SETTINGS_BIND_DEFAULT);
    }

    g_object_unref (settings);
}

static gboolean
composer_header_table_show_post_headers (EComposerHeaderTable *table)
{
    ESourceRegistry *registry;
    GList *list, *link;
    const gchar *extension_name;
    const gchar *target_uid;
    gboolean show_post_headers = FALSE;

    registry = e_composer_header_table_get_registry (table);
    target_uid = e_composer_header_table_get_identity_uid (table);

    extension_name = E_SOURCE_EXTENSION_MAIL_ACCOUNT;
    list = e_source_registry_list_sources (registry, extension_name);

    /* Look for a mail account referencing this mail identity.
     * If the mail account's backend name is "nntp", show the
     * post headers.  Otherwise show the mail headers.
     *
     * XXX What if multiple accounts use this identity but only
     *     one is "nntp"?  Maybe it should be indicated by the
     *     transport somehow?
     */
    for (link = list; link != NULL; link = link->next) {
        ESource *source = E_SOURCE (link->data);
        ESourceExtension *extension;
        const gchar *backend_name;
        const gchar *identity_uid;

        extension = e_source_get_extension (source, extension_name);

        backend_name = e_source_backend_get_backend_name (
            E_SOURCE_BACKEND (extension));
        identity_uid = e_source_mail_account_get_identity_uid (
            E_SOURCE_MAIL_ACCOUNT (extension));

        if (g_strcmp0 (identity_uid, target_uid) != 0)
            continue;

        if (g_strcmp0 (backend_name, "nntp") != 0)
            continue;

        show_post_headers = TRUE;
        break;
    }

    g_list_free_full (list, (GDestroyNotify) g_object_unref);

    return show_post_headers;
}

static void
composer_header_table_from_changed_cb (EComposerHeaderTable *table)
{
    ESource *source = NULL;
    ESource *mail_account = NULL;
    ESourceRegistry *registry;
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerPostHeader *post_header;
    EComposerTextHeader *text_header;
    EDestination **old_destinations;
    EDestination **new_destinations;
    const gchar *reply_to = NULL;
    const gchar * const *bcc = NULL;
    const gchar * const *cc = NULL;
    const gchar *uid;

    /* Keep "Post-To" and "Reply-To" synchronized with "From" */

    registry = e_composer_header_table_get_registry (table);
    uid = e_composer_header_table_get_identity_uid (table);

    if (uid != NULL)
        source = e_source_registry_ref_source (registry, uid);

    /* Make sure this is really a mail identity source. */
    if (source != NULL) {
        const gchar *extension_name;

        extension_name = E_SOURCE_EXTENSION_MAIL_IDENTITY;
        if (!e_source_has_extension (source, extension_name)) {
            g_object_unref (source);
            source = NULL;
        }
    }

    if (source != NULL) {
        ESourceMailIdentity *mi;
        ESourceMailComposition *mc;
        const gchar *extension_name;

        extension_name = E_SOURCE_EXTENSION_MAIL_IDENTITY;
        mi = e_source_get_extension (source, extension_name);

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

        reply_to = e_source_mail_identity_get_reply_to (mi);
        bcc = e_source_mail_composition_get_bcc (mc);
        cc = e_source_mail_composition_get_cc (mc);

        g_object_unref (source);
    }

    type = E_COMPOSER_HEADER_POST_TO;
    header = e_composer_header_table_get_header (table, type);
    post_header = E_COMPOSER_POST_HEADER (header);
    e_composer_post_header_set_mail_account (post_header, mail_account);

    type = E_COMPOSER_HEADER_REPLY_TO;
    header = e_composer_header_table_get_header (table, type);
    text_header = E_COMPOSER_TEXT_HEADER (header);
    e_composer_text_header_set_text (text_header, reply_to);

    /* Update automatic CC destinations. */
    old_destinations =
        e_composer_header_table_get_destinations_cc (table);
    new_destinations =
        composer_header_table_update_destinations (
        old_destinations, cc);
    e_composer_header_table_set_destinations_cc (table, new_destinations);
    e_destination_freev (old_destinations);
    e_destination_freev (new_destinations);

    /* Update automatic BCC destinations. */
    old_destinations =
        e_composer_header_table_get_destinations_bcc (table);
    new_destinations =
        composer_header_table_update_destinations (
        old_destinations, bcc);
    e_composer_header_table_set_destinations_bcc (table, new_destinations);
    e_destination_freev (old_destinations);
    e_destination_freev (new_destinations);

    if (composer_header_table_show_post_headers (table))
        composer_header_table_setup_post_headers (table);
    else
        composer_header_table_setup_mail_headers (table);
}

static void
composer_header_table_set_registry (EComposerHeaderTable *table,
                                    ESourceRegistry *registry)
{
    g_return_if_fail (E_IS_SOURCE_REGISTRY (registry));
    g_return_if_fail (table->priv->registry == NULL);

    table->priv->registry = g_object_ref (registry);
}

static void
composer_header_table_set_shell (EComposerHeaderTable *table,
                                 EShell *shell)
{
    g_return_if_fail (E_IS_SHELL (shell));
    g_return_if_fail (table->priv->shell == NULL);

    table->priv->shell = g_object_ref (shell);
}

static void
composer_header_table_set_property (GObject *object,
                                    guint property_id,
                                    const GValue *value,
                                    GParamSpec *pspec)
{
    EDestination **destinations;
    GList *list;

    switch (property_id) {
        case PROP_DESTINATIONS_BCC:
            destinations = g_value_dup_destinations (value);
            e_composer_header_table_set_destinations_bcc (
                E_COMPOSER_HEADER_TABLE (object),
                destinations);
            e_destination_freev (destinations);
            return;

        case PROP_DESTINATIONS_CC:
            destinations = g_value_dup_destinations (value);
            e_composer_header_table_set_destinations_cc (
                E_COMPOSER_HEADER_TABLE (object),
                destinations);
            e_destination_freev (destinations);
            return;

        case PROP_DESTINATIONS_TO:
            destinations = g_value_dup_destinations (value);
            e_composer_header_table_set_destinations_to (
                E_COMPOSER_HEADER_TABLE (object),
                destinations);
            e_destination_freev (destinations);
            return;

        case PROP_IDENTITY_UID:
            e_composer_header_table_set_identity_uid (
                E_COMPOSER_HEADER_TABLE (object),
                g_value_get_string (value));
            return;

        case PROP_POST_TO:
            list = g_value_dup_string_list (value);
            e_composer_header_table_set_post_to_list (
                E_COMPOSER_HEADER_TABLE (object), list);
            g_list_foreach (list, (GFunc) g_free, NULL);
            g_list_free (list);
            return;

        case PROP_REGISTRY:
            composer_header_table_set_registry (
                E_COMPOSER_HEADER_TABLE (object),
                g_value_get_object (value));
            return;

        case PROP_REPLY_TO:
            e_composer_header_table_set_reply_to (
                E_COMPOSER_HEADER_TABLE (object),
                g_value_get_string (value));
            return;

        case PROP_SHELL:
            composer_header_table_set_shell (
                E_COMPOSER_HEADER_TABLE (object),
                g_value_get_object (value));
            return;

        case PROP_SIGNATURE_UID:
            e_composer_header_table_set_signature_uid (
                E_COMPOSER_HEADER_TABLE (object),
                g_value_get_string (value));
            return;

        case PROP_SUBJECT:
            e_composer_header_table_set_subject (
                E_COMPOSER_HEADER_TABLE (object),
                g_value_get_string (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
composer_header_table_get_property (GObject *object,
                                    guint property_id,
                                    GValue *value,
                                    GParamSpec *pspec)
{
    EDestination **destinations;
    GList *list;

    switch (property_id) {
        case PROP_DESTINATIONS_BCC:
            destinations =
                e_composer_header_table_get_destinations_bcc (
                E_COMPOSER_HEADER_TABLE (object));
            g_value_set_destinations (value, destinations);
            e_destination_freev (destinations);
            return;

        case PROP_DESTINATIONS_CC:
            destinations =
                e_composer_header_table_get_destinations_cc (
                E_COMPOSER_HEADER_TABLE (object));
            g_value_set_destinations (value, destinations);
            e_destination_freev (destinations);
            return;

        case PROP_DESTINATIONS_TO:
            destinations =
                e_composer_header_table_get_destinations_to (
                E_COMPOSER_HEADER_TABLE (object));
            g_value_set_destinations (value, destinations);
            e_destination_freev (destinations);
            return;

        case PROP_IDENTITY_UID:
            g_value_set_string (
                value,
                e_composer_header_table_get_identity_uid (
                E_COMPOSER_HEADER_TABLE (object)));
            return;

        case PROP_POST_TO:
            list = e_composer_header_table_get_post_to (
                E_COMPOSER_HEADER_TABLE (object));
            g_value_set_string_list (value, list);
            g_list_foreach (list, (GFunc) g_free, NULL);
            g_list_free (list);
            return;

        case PROP_REGISTRY:
            g_value_set_object (
                value,
                e_composer_header_table_get_registry (
                E_COMPOSER_HEADER_TABLE (object)));
            return;

        case PROP_REPLY_TO:
            g_value_set_string (
                value,
                e_composer_header_table_get_reply_to (
                E_COMPOSER_HEADER_TABLE (object)));
            return;

        case PROP_SHELL:
            g_value_set_object (
                value,
                e_composer_header_table_get_shell (
                E_COMPOSER_HEADER_TABLE (object)));
            return;

        case PROP_SIGNATURE_COMBO_BOX:
            g_value_set_object (
                value,
                e_composer_header_table_get_signature_combo_box (
                E_COMPOSER_HEADER_TABLE (object)));
            return;

        case PROP_SIGNATURE_UID:
            g_value_set_string (
                value,
                e_composer_header_table_get_signature_uid (
                E_COMPOSER_HEADER_TABLE (object)));
            return;

        case PROP_SUBJECT:
            g_value_set_string (
                value,
                e_composer_header_table_get_subject (
                E_COMPOSER_HEADER_TABLE (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
composer_header_table_dispose (GObject *object)
{
    EComposerHeaderTablePrivate *priv;
    gint ii;

    priv = E_COMPOSER_HEADER_TABLE_GET_PRIVATE (object);

    for (ii = 0; ii < G_N_ELEMENTS (priv->headers); ii++) {
        if (priv->headers[ii] != NULL) {
            g_object_unref (priv->headers[ii]);
            priv->headers[ii] = NULL;
        }
    }

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

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

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

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

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

static void
composer_header_table_constructed (GObject *object)
{
    EComposerHeaderTable *table;
    ENameSelector *name_selector;
    EClientCache *client_cache;
    ESourceRegistry *registry;
    EComposerHeader *header;
    GtkWidget *widget;
    EShell *shell;
    guint ii;
    gint row_padding;

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

    table = E_COMPOSER_HEADER_TABLE (object);
    shell = e_composer_header_table_get_shell (table);
    client_cache = e_shell_get_client_cache (shell);
    registry = e_composer_header_table_get_registry (table);

    name_selector = e_name_selector_new (client_cache);
    table->priv->name_selector = name_selector;

    header = e_composer_from_header_new (registry, _("Fr_om:"));
    composer_header_table_bind_header ("identity-uid", "changed", header);
    g_signal_connect_swapped (
        header, "changed", G_CALLBACK (
        composer_header_table_from_changed_cb), table);
    table->priv->headers[E_COMPOSER_HEADER_FROM] = header;

    header = e_composer_text_header_new_label (registry, _("_Reply-To:"));
    composer_header_table_bind_header ("reply-to", "changed", header);
    table->priv->headers[E_COMPOSER_HEADER_REPLY_TO] = header;

    header = e_composer_name_header_new (
        registry, _("_To:"), name_selector);
    e_composer_header_set_input_tooltip (header, HEADER_TOOLTIP_TO);
    composer_header_table_bind_header ("destinations-to", "changed", header);
    table->priv->headers[E_COMPOSER_HEADER_TO] = header;

    header = e_composer_name_header_new (
        registry, _("_Cc:"), name_selector);
    e_composer_header_set_input_tooltip (header, HEADER_TOOLTIP_CC);
    composer_header_table_bind_header ("destinations-cc", "changed", header);
    table->priv->headers[E_COMPOSER_HEADER_CC] = header;

    header = e_composer_name_header_new (
        registry, _("_Bcc:"), name_selector);
    e_composer_header_set_input_tooltip (header, HEADER_TOOLTIP_BCC);
    composer_header_table_bind_header ("destinations-bcc", "changed", header);
    table->priv->headers[E_COMPOSER_HEADER_BCC] = header;

    header = e_composer_post_header_new (registry, _("_Post To:"));
    composer_header_table_bind_header ("post-to", "changed", header);
    table->priv->headers[E_COMPOSER_HEADER_POST_TO] = header;

    header = e_composer_spell_header_new_label (registry, _("S_ubject:"));
    composer_header_table_bind_header ("subject", "changed", header);
    table->priv->headers[E_COMPOSER_HEADER_SUBJECT] = header;

    widget = e_mail_signature_combo_box_new (registry);
    composer_header_table_bind_widget ("signature-uid", "changed", widget);
    table->priv->signature_combo_box = g_object_ref_sink (widget);

    widget = gtk_label_new_with_mnemonic (_("Si_gnature:"));
    gtk_label_set_mnemonic_widget (
        GTK_LABEL (widget), table->priv->signature_combo_box);
    table->priv->signature_label = g_object_ref_sink (widget);

    /* Use "ypadding" instead of "row-spacing" because some rows may
     * be invisible and we don't want spacing around them. */

    row_padding = 3;

    for (ii = 0; ii < G_N_ELEMENTS (table->priv->headers); ii++) {
        gtk_table_attach (
            GTK_TABLE (object),
            table->priv->headers[ii]->title_widget, 0, 1,
            ii, ii + 1, GTK_FILL, GTK_FILL, 0, row_padding);
        gtk_table_attach (
            GTK_TABLE (object),
            table->priv->headers[ii]->input_widget, 1, 4,
            ii, ii + 1, GTK_FILL | GTK_EXPAND, 0, 0, row_padding);
    }

    ii = E_COMPOSER_HEADER_FROM;

    /* Leave room in the "From" row for signature stuff. */
    gtk_container_child_set (
        GTK_CONTAINER (object),
        table->priv->headers[ii]->input_widget,
        "right-attach", 2, NULL);

    g_object_bind_property (
        table->priv->headers[ii]->input_widget, "visible",
        table->priv->signature_label, "visible",
        G_BINDING_SYNC_CREATE);

    g_object_bind_property (
        table->priv->headers[ii]->input_widget, "visible",
        table->priv->signature_combo_box, "visible",
        G_BINDING_SYNC_CREATE);

    /* Now add the signature stuff. */
    gtk_table_attach (
        GTK_TABLE (object),
        table->priv->signature_label,
        2, 3, ii, ii + 1, 0, 0, 0, row_padding);
    gtk_table_attach (
        GTK_TABLE (object),
        table->priv->signature_combo_box,
        3, 4, ii, ii + 1, 0, 0, 0, row_padding);

    /* Initialize the headers. */
    composer_header_table_from_changed_cb (table);
}

static void
e_composer_header_table_class_init (EComposerHeaderTableClass *class)
{
    GObjectClass *object_class;

    g_type_class_add_private (class, sizeof (EComposerHeaderTablePrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = composer_header_table_set_property;
    object_class->get_property = composer_header_table_get_property;
    object_class->dispose = composer_header_table_dispose;
    object_class->constructed = composer_header_table_constructed;

    g_object_class_install_property (
        object_class,
        PROP_DESTINATIONS_BCC,
        g_param_spec_boxed (
            "destinations-bcc",
            NULL,
            NULL,
            G_TYPE_PTR_ARRAY,
            G_PARAM_READWRITE |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_DESTINATIONS_CC,
        g_param_spec_boxed (
            "destinations-cc",
            NULL,
            NULL,
            G_TYPE_PTR_ARRAY,
            G_PARAM_READWRITE |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_DESTINATIONS_TO,
        g_param_spec_boxed (
            "destinations-to",
            NULL,
            NULL,
            G_TYPE_PTR_ARRAY,
            G_PARAM_READWRITE |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_IDENTITY_UID,
        g_param_spec_string (
            "identity-uid",
            NULL,
            NULL,
            NULL,
            G_PARAM_READWRITE |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_POST_TO,
        g_param_spec_boxed (
            "post-to",
            NULL,
            NULL,
            G_TYPE_PTR_ARRAY,
            G_PARAM_READWRITE |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_REGISTRY,
        g_param_spec_object (
            "registry",
            NULL,
            NULL,
            E_TYPE_SOURCE_REGISTRY,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_REPLY_TO,
        g_param_spec_string (
            "reply-to",
            NULL,
            NULL,
            NULL,
            G_PARAM_READWRITE |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_SHELL,
        g_param_spec_object (
            "shell",
            NULL,
            NULL,
            E_TYPE_SHELL,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_SIGNATURE_COMBO_BOX,
        g_param_spec_string (
            "signature-combo-box",
            NULL,
            NULL,
            NULL,
            G_PARAM_READABLE |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_SIGNATURE_UID,
        g_param_spec_string (
            "signature-uid",
            NULL,
            NULL,
            NULL,
            G_PARAM_READWRITE |
            G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (
        object_class,
        PROP_SUBJECT,
        g_param_spec_string (
            "subject",
            NULL,
            NULL,
            NULL,
            G_PARAM_READWRITE |
            G_PARAM_STATIC_STRINGS));
}

static void
composer_header_table_realize_cb (EComposerHeaderTable *table)
{
    g_return_if_fail (table != NULL);
    g_return_if_fail (table->priv != NULL);

    g_signal_handlers_disconnect_by_func (
        table, composer_header_table_realize_cb, NULL);

    e_name_selector_load_books (table->priv->name_selector);
}

static void
e_composer_header_table_init (EComposerHeaderTable *table)
{
    gint rows;

    table->priv = E_COMPOSER_HEADER_TABLE_GET_PRIVATE (table);

    rows = G_N_ELEMENTS (table->priv->headers);
    gtk_table_resize (GTK_TABLE (table), rows, 4);
    gtk_table_set_row_spacings (GTK_TABLE (table), 0);
    gtk_table_set_col_spacings (GTK_TABLE (table), 6);

    /* postpone name_selector loading, do that only when really needed */
    g_signal_connect (
        table, "realize",
        G_CALLBACK (composer_header_table_realize_cb), NULL);
}

GtkWidget *
e_composer_header_table_new (EShell *shell,
                             ESourceRegistry *registry)
{
    g_return_val_if_fail (E_IS_SHELL (shell), NULL);
    g_return_val_if_fail (E_IS_SOURCE_REGISTRY (registry), NULL);

    return g_object_new (
        E_TYPE_COMPOSER_HEADER_TABLE,
        "shell", shell, "registry", registry, NULL);
}

EShell *
e_composer_header_table_get_shell (EComposerHeaderTable *table)
{
    g_return_val_if_fail (E_IS_COMPOSER_HEADER_TABLE (table), NULL);

    return table->priv->shell;
}

ESourceRegistry *
e_composer_header_table_get_registry (EComposerHeaderTable *table)
{
    g_return_val_if_fail (E_IS_COMPOSER_HEADER_TABLE (table), NULL);

    return table->priv->registry;
}

EComposerHeader *
e_composer_header_table_get_header (EComposerHeaderTable *table,
                                    EComposerHeaderType type)
{
    g_return_val_if_fail (E_IS_COMPOSER_HEADER_TABLE (table), NULL);
    g_return_val_if_fail (type < E_COMPOSER_NUM_HEADERS, NULL);

    return table->priv->headers[type];
}

EMailSignatureComboBox *
e_composer_header_table_get_signature_combo_box (EComposerHeaderTable *table)
{
    g_return_val_if_fail (E_IS_COMPOSER_HEADER_TABLE (table), NULL);

    return E_MAIL_SIGNATURE_COMBO_BOX (table->priv->signature_combo_box);
}

EDestination **
e_composer_header_table_get_destinations (EComposerHeaderTable *table)
{
    EDestination **destinations;
    EDestination **to, **cc, **bcc;
    gint total, n_to, n_cc, n_bcc;

    g_return_val_if_fail (E_IS_COMPOSER_HEADER_TABLE (table), NULL);

    to = e_composer_header_table_get_destinations_to (table);
    for (n_to = 0; to != NULL && to[n_to] != NULL; n_to++);

    cc = e_composer_header_table_get_destinations_cc (table);
    for (n_cc = 0; cc != NULL && cc[n_cc] != NULL; n_cc++);

    bcc = e_composer_header_table_get_destinations_bcc (table);
    for (n_bcc = 0; bcc != NULL && bcc[n_bcc] != NULL; n_bcc++);

    total = n_to + n_cc + n_bcc;
    destinations = g_new0 (EDestination *, total + 1);

    while (n_bcc > 0 && total > 0)
        destinations[--total] = g_object_ref (bcc[--n_bcc]);

    while (n_cc > 0 && total > 0)
        destinations[--total] = g_object_ref (cc[--n_cc]);

    while (n_to > 0 && total > 0)
        destinations[--total] = g_object_ref (to[--n_to]);

    /* Counters should all be zero now. */
    g_assert (total == 0 && n_to == 0 && n_cc == 0 && n_bcc == 0);

    e_destination_freev (to);
    e_destination_freev (cc);
    e_destination_freev (bcc);

    return destinations;
}

EDestination **
e_composer_header_table_get_destinations_bcc (EComposerHeaderTable *table)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerNameHeader *name_header;

    g_return_val_if_fail (E_IS_COMPOSER_HEADER_TABLE (table), NULL);

    type = E_COMPOSER_HEADER_BCC;
    header = e_composer_header_table_get_header (table, type);
    name_header = E_COMPOSER_NAME_HEADER (header);

    return e_composer_name_header_get_destinations (name_header);
}

void
e_composer_header_table_add_destinations_bcc (EComposerHeaderTable *table,
                                              EDestination **destinations)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerNameHeader *name_header;

    g_return_if_fail (E_IS_COMPOSER_HEADER_TABLE (table));

    type = E_COMPOSER_HEADER_BCC;
    header = e_composer_header_table_get_header (table, type);
    name_header = E_COMPOSER_NAME_HEADER (header);

    e_composer_name_header_add_destinations (name_header, destinations);

    if (destinations != NULL && *destinations != NULL)
        e_composer_header_set_visible (header, TRUE);
}

void
e_composer_header_table_set_destinations_bcc (EComposerHeaderTable *table,
                                              EDestination **destinations)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerNameHeader *name_header;

    g_return_if_fail (E_IS_COMPOSER_HEADER_TABLE (table));

    type = E_COMPOSER_HEADER_BCC;
    header = e_composer_header_table_get_header (table, type);
    name_header = E_COMPOSER_NAME_HEADER (header);

    e_composer_name_header_set_destinations (name_header, destinations);

    if (destinations != NULL && *destinations != NULL)
        e_composer_header_set_visible (header, TRUE);
}

EDestination **
e_composer_header_table_get_destinations_cc (EComposerHeaderTable *table)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerNameHeader *name_header;

    g_return_val_if_fail (E_IS_COMPOSER_HEADER_TABLE (table), NULL);

    type = E_COMPOSER_HEADER_CC;
    header = e_composer_header_table_get_header (table, type);
    name_header = E_COMPOSER_NAME_HEADER (header);

    return e_composer_name_header_get_destinations (name_header);
}

void
e_composer_header_table_add_destinations_cc (EComposerHeaderTable *table,
                                             EDestination **destinations)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerNameHeader *name_header;

    g_return_if_fail (E_IS_COMPOSER_HEADER_TABLE (table));

    type = E_COMPOSER_HEADER_CC;
    header = e_composer_header_table_get_header (table, type);
    name_header = E_COMPOSER_NAME_HEADER (header);

    e_composer_name_header_add_destinations (name_header, destinations);

    if (destinations != NULL && *destinations != NULL)
        e_composer_header_set_visible (header, TRUE);
}

void
e_composer_header_table_set_destinations_cc (EComposerHeaderTable *table,
                                             EDestination **destinations)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerNameHeader *name_header;

    g_return_if_fail (E_IS_COMPOSER_HEADER_TABLE (table));

    type = E_COMPOSER_HEADER_CC;
    header = e_composer_header_table_get_header (table, type);
    name_header = E_COMPOSER_NAME_HEADER (header);

    e_composer_name_header_set_destinations (name_header, destinations);

    if (destinations != NULL && *destinations != NULL)
        e_composer_header_set_visible (header, TRUE);
}

EDestination **
e_composer_header_table_get_destinations_to (EComposerHeaderTable *table)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerNameHeader *name_header;

    g_return_val_if_fail (E_IS_COMPOSER_HEADER_TABLE (table), NULL);

    type = E_COMPOSER_HEADER_TO;
    header = e_composer_header_table_get_header (table, type);
    name_header = E_COMPOSER_NAME_HEADER (header);

    return e_composer_name_header_get_destinations (name_header);
}

void
e_composer_header_table_add_destinations_to (EComposerHeaderTable *table,
                                             EDestination **destinations)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerNameHeader *name_header;

    g_return_if_fail (E_IS_COMPOSER_HEADER_TABLE (table));

    type = E_COMPOSER_HEADER_TO;
    header = e_composer_header_table_get_header (table, type);
    name_header = E_COMPOSER_NAME_HEADER (header);

    e_composer_name_header_add_destinations (name_header, destinations);
}

void
e_composer_header_table_set_destinations_to (EComposerHeaderTable *table,
                                             EDestination **destinations)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerNameHeader *name_header;

    g_return_if_fail (E_IS_COMPOSER_HEADER_TABLE (table));

    type = E_COMPOSER_HEADER_TO;
    header = e_composer_header_table_get_header (table, type);
    name_header = E_COMPOSER_NAME_HEADER (header);

    e_composer_name_header_set_destinations (name_header, destinations);
}

const gchar *
e_composer_header_table_get_identity_uid (EComposerHeaderTable *table)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerFromHeader *from_header;

    g_return_val_if_fail (E_IS_COMPOSER_HEADER_TABLE (table), NULL);

    type = E_COMPOSER_HEADER_FROM;
    header = e_composer_header_table_get_header (table, type);
    from_header = E_COMPOSER_FROM_HEADER (header);

    return e_composer_from_header_get_active_id (from_header);
}

void
e_composer_header_table_set_identity_uid (EComposerHeaderTable *table,
                                          const gchar *identity_uid)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerFromHeader *from_header;

    g_return_if_fail (E_IS_COMPOSER_HEADER_TABLE (table));

    type = E_COMPOSER_HEADER_FROM;
    header = e_composer_header_table_get_header (table, type);
    from_header = E_COMPOSER_FROM_HEADER (header);

    e_composer_from_header_set_active_id (from_header, identity_uid);
}

GList *
e_composer_header_table_get_post_to (EComposerHeaderTable *table)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerPostHeader *post_header;

    g_return_val_if_fail (E_IS_COMPOSER_HEADER_TABLE (table), NULL);

    type = E_COMPOSER_HEADER_POST_TO;
    header = e_composer_header_table_get_header (table, type);
    post_header = E_COMPOSER_POST_HEADER (header);

    return e_composer_post_header_get_folders (post_header);
}

void
e_composer_header_table_set_post_to_base (EComposerHeaderTable *table,
                                          const gchar *base_url,
                                          const gchar *folders)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerPostHeader *post_header;

    g_return_if_fail (E_IS_COMPOSER_HEADER_TABLE (table));

    type = E_COMPOSER_HEADER_POST_TO;
    header = e_composer_header_table_get_header (table, type);
    post_header = E_COMPOSER_POST_HEADER (header);

    e_composer_post_header_set_folders_base (post_header, base_url, folders);
}

void
e_composer_header_table_set_post_to_list (EComposerHeaderTable *table,
                                          GList *folders)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerPostHeader *post_header;

    g_return_if_fail (E_IS_COMPOSER_HEADER_TABLE (table));

    type = E_COMPOSER_HEADER_POST_TO;
    header = e_composer_header_table_get_header (table, type);
    post_header = E_COMPOSER_POST_HEADER (header);

    e_composer_post_header_set_folders (post_header, folders);
}

const gchar *
e_composer_header_table_get_reply_to (EComposerHeaderTable *table)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerTextHeader *text_header;

    g_return_val_if_fail (E_IS_COMPOSER_HEADER_TABLE (table), NULL);

    type = E_COMPOSER_HEADER_REPLY_TO;
    header = e_composer_header_table_get_header (table, type);
    text_header = E_COMPOSER_TEXT_HEADER (header);

    return e_composer_text_header_get_text (text_header);
}

void
e_composer_header_table_set_reply_to (EComposerHeaderTable *table,
                                      const gchar *reply_to)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerTextHeader *text_header;

    g_return_if_fail (E_IS_COMPOSER_HEADER_TABLE (table));

    type = E_COMPOSER_HEADER_REPLY_TO;
    header = e_composer_header_table_get_header (table, type);
    text_header = E_COMPOSER_TEXT_HEADER (header);

    e_composer_text_header_set_text (text_header, reply_to);

    if (reply_to != NULL && *reply_to != '\0')
        e_composer_header_set_visible (header, TRUE);
}

const gchar *
e_composer_header_table_get_signature_uid (EComposerHeaderTable *table)
{
    EMailSignatureComboBox *combo_box;

    g_return_val_if_fail (E_IS_COMPOSER_HEADER_TABLE (table), NULL);

    combo_box = e_composer_header_table_get_signature_combo_box (table);

    return gtk_combo_box_get_active_id (GTK_COMBO_BOX (combo_box));
}

void
e_composer_header_table_set_signature_uid (EComposerHeaderTable *table,
                                           const gchar *signature_uid)
{
    EMailSignatureComboBox *combo_box;

    g_return_if_fail (E_IS_COMPOSER_HEADER_TABLE (table));

    combo_box = e_composer_header_table_get_signature_combo_box (table);

    gtk_combo_box_set_active_id (GTK_COMBO_BOX (combo_box), signature_uid);
}

const gchar *
e_composer_header_table_get_subject (EComposerHeaderTable *table)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerTextHeader *text_header;

    g_return_val_if_fail (E_IS_COMPOSER_HEADER_TABLE (table), NULL);

    type = E_COMPOSER_HEADER_SUBJECT;
    header = e_composer_header_table_get_header (table, type);
    text_header = E_COMPOSER_TEXT_HEADER (header);

    return e_composer_text_header_get_text (text_header);
}

void
e_composer_header_table_set_subject (EComposerHeaderTable *table,
                                     const gchar *subject)
{
    EComposerHeader *header;
    EComposerHeaderType type;
    EComposerTextHeader *text_header;

    g_return_if_fail (E_IS_COMPOSER_HEADER_TABLE (table));

    type = E_COMPOSER_HEADER_SUBJECT;
    header = e_composer_header_table_get_header (table, type);
    text_header = E_COMPOSER_TEXT_HEADER (header);

    e_composer_text_header_set_text (text_header, subject);
}

void
e_composer_header_table_set_header_visible (EComposerHeaderTable *table,
                                            EComposerHeaderType type,
                                            gboolean visible)
{
    EComposerHeader *header;

    header = e_composer_header_table_get_header (table, type);
    e_composer_header_set_visible (header, visible);

    /* Signature widgets track the "From" header. */
    if (type == E_COMPOSER_HEADER_FROM) {
        if (visible) {
            gtk_widget_show (table->priv->signature_label);
            gtk_widget_show (table->priv->signature_combo_box);
        } else {
            gtk_widget_hide (table->priv->signature_label);
            gtk_widget_hide (table->priv->signature_combo_box);
        }
    }
}