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/*
 * 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/>
 *
 *
 * Authors:
 *      Michael Zucchi <notzed@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

#include <string.h>
#include <stdlib.h>

#include <gtk/gtk.h>

#include "em-config.h"
#include "em-utils.h"
#include "em-composer-utils.h"

#include <gconf/gconf.h>
#include <gconf/gconf-client.h>

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

G_DEFINE_TYPE (EMConfig, em_config, E_TYPE_CONFIG)

struct _EMConfigPrivate {
    gint account_changed_id;
};

static void
emp_account_changed (EAccount *ea,
                     gint id,
                     EMConfig *emc)
{
    e_config_target_changed ((EConfig *) emc, E_CONFIG_TARGET_CHANGED_STATE);
}

static void
em_config_finalize (GObject *object)
{
    /* Note we can't be unreffed if a target exists, so the target
     * will need to be freed first which will clean up any
     * listeners */

    g_free (((EMConfig *) object)->priv);

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

static void
em_config_set_target (EConfig *ep,
                      EConfigTarget *t)
{
    /* Chain up to parent's set_target() method. */
    E_CONFIG_CLASS (em_config_parent_class)->set_target (ep, t);

    if (t) {
        switch (t->type) {
        case EM_CONFIG_TARGET_FOLDER: {
            /*EMConfigTargetFolder *s = (EMConfigTargetFolder *)t;*/
            break; }
        case EM_CONFIG_TARGET_PREFS: {
            /*EMConfigTargetPrefs *s = (EMConfigTargetPrefs *)t;*/
            break; }
        case EM_CONFIG_TARGET_ACCOUNT: {
            EMConfigTargetAccount *s = (EMConfigTargetAccount *) t;
            EMConfig *config = (EMConfig *) ep;

            config->priv->account_changed_id = g_signal_connect (
                s->modified_account, "changed",
                G_CALLBACK (emp_account_changed), ep);

            em_config_target_new_account_update_settings (
                ep, s, s->settings);
            break; }
        }
    }
}

static void
em_config_target_free (EConfig *ep,
                       EConfigTarget *t)
{
    if (ep->target == t) {
        switch (t->type) {
        case EM_CONFIG_TARGET_FOLDER:
            break;
        case EM_CONFIG_TARGET_PREFS:
            break;
        case EM_CONFIG_TARGET_ACCOUNT: {
            EMConfigTargetAccount *s = (EMConfigTargetAccount *) t;
            EMConfig *config = (EMConfig *) ep;

            if (config->priv->account_changed_id > 0) {
                g_signal_handler_disconnect (
                    s->modified_account,
                    config->priv->account_changed_id);
                config->priv->account_changed_id = 0;
            }

            em_config_target_new_account_update_settings (ep, s, NULL);
            break; }
        }
    }

    switch (t->type) {
    case EM_CONFIG_TARGET_FOLDER: {
        EMConfigTargetFolder *s = (EMConfigTargetFolder *) t;

        g_object_unref (s->folder);
        break; }
    case EM_CONFIG_TARGET_PREFS: {
        EMConfigTargetPrefs *s = (EMConfigTargetPrefs *) t;

        if (s->gconf)
            g_object_unref (s->gconf);
        break; }
    case EM_CONFIG_TARGET_ACCOUNT: {
        EMConfigTargetAccount *s = (EMConfigTargetAccount *) t;

        if (s->original_account != NULL)
            g_object_unref (s->original_account);
        if (s->modified_account != NULL)
            g_object_unref (s->modified_account);
        if (s->settings != NULL)
            g_object_unref (s->settings);
        break; }
    }

    /* Chain up to parent's target_free() method. */
    E_CONFIG_CLASS (em_config_parent_class)->target_free (ep, t);
}

static void
em_config_class_init (EMConfigClass *class)
{
    GObjectClass *object_class;
    EConfigClass *config_class;

    object_class = G_OBJECT_CLASS (class);
    object_class->finalize = em_config_finalize;

    config_class = E_CONFIG_CLASS (class);
    config_class->set_target = em_config_set_target;
    config_class->target_free = em_config_target_free;
}

static void
em_config_init (EMConfig *emp)
{
    emp->priv = g_malloc0 (sizeof (*emp->priv));
}

EMConfig *
em_config_new (gint type,
               const gchar *menuid)
{
    EMConfig *emp;

    emp = g_object_new (em_config_get_type (), NULL);
    e_config_construct (&emp->config, type, menuid);

    return emp;
}

EMConfigTargetFolder *
em_config_target_new_folder (EMConfig *emp,
                             CamelFolder *folder)
{
    EMConfigTargetFolder *t;

    t = e_config_target_new (
        &emp->config, EM_CONFIG_TARGET_FOLDER, sizeof (*t));

    t->folder = g_object_ref (folder);

    return t;
}

EMConfigTargetPrefs *
em_config_target_new_prefs (EMConfig *emp,
                            GConfClient *gconf)
{
    EMConfigTargetPrefs *t;

    t = e_config_target_new (
        &emp->config, EM_CONFIG_TARGET_PREFS, sizeof (*t));

    if (GCONF_IS_CLIENT (gconf))
        t->gconf = g_object_ref (gconf);
    else
        t->gconf = NULL;

    return t;
}

EMConfigTargetAccount *
em_config_target_new_account (EMConfig *emp,
                              EAccount *original_account,
                              EAccount *modified_account,
                              CamelSettings *settings)
{
    EMConfigTargetAccount *t;

    t = e_config_target_new (
        &emp->config, EM_CONFIG_TARGET_ACCOUNT, sizeof (*t));

    if (original_account != NULL)
        t->original_account = g_object_ref (original_account);
    else
        t->original_account = NULL;

    if (modified_account != NULL)
        t->modified_account = g_object_ref (modified_account);
    else
        t->modified_account = NULL;

    if (settings != NULL)
        t->settings = g_object_ref (settings);
    else
        t->settings = NULL;

    return t;
}

void
em_config_target_new_account_update_settings (EConfig *ep,
                                              EMConfigTargetAccount *target,
                                              CamelSettings *settings)
{
    g_return_if_fail (ep != NULL);
    g_return_if_fail (target != NULL);

    if (settings)
        g_object_ref (settings);

    if (target->settings != NULL) {
        g_signal_handlers_disconnect_by_func (
            target->settings, emp_account_changed, ep);
        g_object_unref (target->settings);
    }

    target->settings = settings;

    if (target->settings != NULL)
        g_signal_connect (
            target->settings, "notify",
            G_CALLBACK (emp_account_changed), ep);
}