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/*
 * e-cal-source-config.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-cal-source-config.h"

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

#include "e-misc-utils.h"

#define E_CAL_SOURCE_CONFIG_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_CAL_SOURCE_CONFIG, ECalSourceConfigPrivate))

struct _ECalSourceConfigPrivate {
    ECalClientSourceType source_type;
    GtkWidget *color_button;
    GtkWidget *default_button;
};

enum {
    PROP_0,
    PROP_SOURCE_TYPE
};

G_DEFINE_TYPE (
    ECalSourceConfig,
    e_cal_source_config,
    E_TYPE_SOURCE_CONFIG)

static ESource *
cal_source_config_ref_default (ESourceConfig *config)
{
    ECalSourceConfigPrivate *priv;
    ESourceRegistry *registry;

    priv = E_CAL_SOURCE_CONFIG_GET_PRIVATE (config);
    registry = e_source_config_get_registry (config);

    if (priv->source_type == E_CAL_CLIENT_SOURCE_TYPE_EVENTS)
        return e_source_registry_ref_default_calendar (registry);
    else if (priv->source_type == E_CAL_CLIENT_SOURCE_TYPE_MEMOS)
        return e_source_registry_ref_default_memo_list (registry);
    else if (priv->source_type == E_CAL_CLIENT_SOURCE_TYPE_TASKS)
        return e_source_registry_ref_default_task_list (registry);

    g_return_val_if_reached (NULL);
}

static void
cal_source_config_set_default (ESourceConfig *config,
                               ESource *source)
{
    ECalSourceConfigPrivate *priv;
    ESourceRegistry *registry;

    priv = E_CAL_SOURCE_CONFIG_GET_PRIVATE (config);
    registry = e_source_config_get_registry (config);

    if (priv->source_type == E_CAL_CLIENT_SOURCE_TYPE_EVENTS)
        e_source_registry_set_default_calendar (registry, source);
    else if (priv->source_type == E_CAL_CLIENT_SOURCE_TYPE_MEMOS)
        e_source_registry_set_default_memo_list (registry, source);
    else if (priv->source_type == E_CAL_CLIENT_SOURCE_TYPE_TASKS)
        e_source_registry_set_default_task_list (registry, source);
}

static void
cal_source_config_set_source_type (ECalSourceConfig *config,
                                   ECalClientSourceType source_type)
{
    config->priv->source_type = source_type;
}

static void
cal_source_config_set_property (GObject *object,
                                guint property_id,
                                const GValue *value,
                                GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_SOURCE_TYPE:
            cal_source_config_set_source_type (
                E_CAL_SOURCE_CONFIG (object),
                g_value_get_enum (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
cal_source_config_get_property (GObject *object,
                                guint property_id,
                                GValue *value,
                                GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_SOURCE_TYPE:
            g_value_set_enum (
                value,
                e_cal_source_config_get_source_type (
                E_CAL_SOURCE_CONFIG (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
cal_source_config_dispose (GObject *object)
{
    ECalSourceConfigPrivate *priv;

    priv = E_CAL_SOURCE_CONFIG_GET_PRIVATE (object);

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

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

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

static void
cal_source_config_constructed (GObject *object)
{
    ECalSourceConfigPrivate *priv;
    ESource *default_source;
    ESource *original_source;
    ESourceConfig *config;
    GObjectClass *class;
    GtkWidget *widget;
    const gchar *label;

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

    config = E_SOURCE_CONFIG (object);
    priv = E_CAL_SOURCE_CONFIG_GET_PRIVATE (object);

    widget = gtk_color_button_new ();
    priv->color_button = g_object_ref_sink (widget);
    gtk_widget_show (widget);

    switch (priv->source_type) {
        case E_CAL_CLIENT_SOURCE_TYPE_EVENTS:
            label = _("Mark as default calendar");
            break;
        case E_CAL_CLIENT_SOURCE_TYPE_TASKS:
            label = _("Mark as default task list");
            break;
        case E_CAL_CLIENT_SOURCE_TYPE_MEMOS:
            label = _("Mark as default memo list");
            break;
        default:
            /* No need to translate this string. */
            label = "Invalid ECalSourceType value";
            g_warn_if_reached ();
    }

    widget = gtk_check_button_new_with_label (label);
    priv->default_button = g_object_ref_sink (widget);
    gtk_widget_show (widget);

    default_source = cal_source_config_ref_default (config);
    original_source = e_source_config_get_original_source (config);

    if (original_source != NULL) {
        gboolean active;

        active = e_source_equal (original_source, default_source);
        g_object_set (priv->default_button, "active", active, NULL);
    }

    g_object_unref (default_source);

    e_source_config_insert_widget (
        config, NULL, _("Color:"), priv->color_button);

    e_source_config_insert_widget (
        config, NULL, NULL, priv->default_button);
}

static const gchar *
cal_source_config_get_backend_extension_name (ESourceConfig *config)
{
    ECalSourceConfig *cal_config;
    const gchar *extension_name;

    cal_config = E_CAL_SOURCE_CONFIG (config);

    switch (e_cal_source_config_get_source_type (cal_config)) {
        case E_CAL_CLIENT_SOURCE_TYPE_EVENTS:
            extension_name = E_SOURCE_EXTENSION_CALENDAR;
            break;
        case E_CAL_CLIENT_SOURCE_TYPE_TASKS:
            extension_name = E_SOURCE_EXTENSION_TASK_LIST;
            break;
        case E_CAL_CLIENT_SOURCE_TYPE_MEMOS:
            extension_name = E_SOURCE_EXTENSION_MEMO_LIST;
            break;
        default:
            g_return_val_if_reached (NULL);
    }

    return extension_name;
}

static GList *
cal_source_config_list_eligible_collections (ESourceConfig *config)
{
    GQueue trash = G_QUEUE_INIT;
    GList *list, *link;

    /* Chain up to parent's list_eligible_collections() method. */
    list = E_SOURCE_CONFIG_CLASS (e_cal_source_config_parent_class)->
        list_eligible_collections (config);

    for (link = list; link != NULL; link = g_list_next (link)) {
        ESource *source = E_SOURCE (link->data);
        ESourceCollection *extension;
        const gchar *extension_name;

        extension_name = E_SOURCE_EXTENSION_COLLECTION;
        extension = e_source_get_extension (source, extension_name);

        if (!e_source_collection_get_calendar_enabled (extension))
            g_queue_push_tail (&trash, link);
    }

    /* Remove ineligible collections from the list. */
    while ((link = g_queue_pop_head (&trash)) != NULL) {
        g_object_unref (link->data);
        list = g_list_delete_link (list, link);
    }

    return list;
}

static void
cal_source_config_init_candidate (ESourceConfig *config,
                                  ESource *scratch_source)
{
    ECalSourceConfigPrivate *priv;
    ESourceConfigClass *class;
    ESourceExtension *extension;
    const gchar *extension_name;

    /* Chain up to parent's init_candidate() method. */
    class = E_SOURCE_CONFIG_CLASS (e_cal_source_config_parent_class);
    class->init_candidate (config, scratch_source);

    priv = E_CAL_SOURCE_CONFIG_GET_PRIVATE (config);

    extension_name = e_source_config_get_backend_extension_name (config);
    extension = e_source_get_extension (scratch_source, extension_name);

    g_object_bind_property_full (
        extension, "color",
        priv->color_button, "color",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE,
        e_binding_transform_string_to_color,
        e_binding_transform_color_to_string,
        NULL, (GDestroyNotify) NULL);
}

static void
cal_source_config_commit_changes (ESourceConfig *config,
                                  ESource *scratch_source)
{
    ECalSourceConfigPrivate *priv;
    GtkToggleButton *toggle_button;
    ESourceConfigClass *class;
    ESource *default_source;

    priv = E_CAL_SOURCE_CONFIG_GET_PRIVATE (config);
    toggle_button = GTK_TOGGLE_BUTTON (priv->default_button);

    /* Chain up to parent's commit_changes() method. */
    class = E_SOURCE_CONFIG_CLASS (e_cal_source_config_parent_class);
    class->commit_changes (config, scratch_source);

    default_source = cal_source_config_ref_default (config);

    /* The default setting is a little tricky to get right.  If
     * the toggle button is active, this ESource is now the default.
     * That much is simple.  But if the toggle button is NOT active,
     * then we have to inspect the old default.  If this ESource WAS
     * the default, reset the default to 'system'.  If this ESource
     * WAS NOT the old default, leave it alone. */
    if (gtk_toggle_button_get_active (toggle_button))
        cal_source_config_set_default (config, scratch_source);
    else if (e_source_equal (scratch_source, default_source))
        cal_source_config_set_default (config, NULL);

    g_object_unref (default_source);
}

static void
e_cal_source_config_class_init (ECalSourceConfigClass *class)
{
    GObjectClass *object_class;
    ESourceConfigClass *source_config_class;

    g_type_class_add_private (class, sizeof (ECalSourceConfigPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = cal_source_config_set_property;
    object_class->get_property = cal_source_config_get_property;
    object_class->dispose = cal_source_config_dispose;
    object_class->constructed = cal_source_config_constructed;

    source_config_class = E_SOURCE_CONFIG_CLASS (class);
    source_config_class->get_backend_extension_name =
        cal_source_config_get_backend_extension_name;
    source_config_class->list_eligible_collections =
        cal_source_config_list_eligible_collections;
    source_config_class->init_candidate = cal_source_config_init_candidate;
    source_config_class->commit_changes = cal_source_config_commit_changes;

    g_object_class_install_property (
        object_class,
        PROP_SOURCE_TYPE,
        g_param_spec_enum (
            "source-type",
            "Source Type",
            "The iCalendar object type",
            E_TYPE_CAL_CLIENT_SOURCE_TYPE,
            E_CAL_CLIENT_SOURCE_TYPE_EVENTS,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY |
            G_PARAM_STATIC_STRINGS));
}

static void
e_cal_source_config_init (ECalSourceConfig *config)
{
    config->priv = E_CAL_SOURCE_CONFIG_GET_PRIVATE (config);
}

GtkWidget *
e_cal_source_config_new (ESourceRegistry *registry,
                         ESource *original_source,
                         ECalClientSourceType source_type)
{
    g_return_val_if_fail (E_IS_SOURCE_REGISTRY (registry), NULL);

    if (original_source != NULL)
        g_return_val_if_fail (E_IS_SOURCE (original_source), NULL);

    return g_object_new (
        E_TYPE_CAL_SOURCE_CONFIG, "registry", registry,
        "original-source", original_source, "source-type",
        source_type, NULL);
}

ECalClientSourceType
e_cal_source_config_get_source_type (ECalSourceConfig *config)
{
    g_return_val_if_fail (E_IS_CAL_SOURCE_CONFIG (config), 0);

    return config->priv->source_type;
}

void
e_cal_source_config_add_offline_toggle (ECalSourceConfig *config,
                                        ESource *scratch_source)
{
    GtkWidget *widget;
    ESourceExtension *extension;
    const gchar *extension_name;
    const gchar *label;

    g_return_if_fail (E_IS_CAL_SOURCE_CONFIG (config));
    g_return_if_fail (E_IS_SOURCE (scratch_source));

    extension_name = E_SOURCE_EXTENSION_OFFLINE;
    extension = e_source_get_extension (scratch_source, extension_name);

    switch (e_cal_source_config_get_source_type (config)) {
        case E_CAL_CLIENT_SOURCE_TYPE_EVENTS:
            label = _("Copy calendar contents locally "
                  "for offline operation");
            break;
        case E_CAL_CLIENT_SOURCE_TYPE_TASKS:
            label = _("Copy task list contents locally "
                  "for offline operation");
            break;
        case E_CAL_CLIENT_SOURCE_TYPE_MEMOS:
            label = _("Copy memo list contents locally "
                  "for offline operation");
            break;
        default:
            g_return_if_reached ();
    }

    widget = gtk_check_button_new_with_label (label);
    e_source_config_insert_widget (
        E_SOURCE_CONFIG (config), scratch_source, NULL, widget);
    gtk_widget_show (widget);

    g_object_bind_property (
        extension, "stay-synchronized",
        widget, "active",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE);
}