path: root/modules/settings/e-settings-deprecated.c

/*
 * e-settings-deprecated.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/>.
 *
 */

/* This class is different from the others in this module.  Its purpose
 * is to transfer values from deprecated GSettings keys to the preferred
 * keys on startup, and keep them synchronized at all times for backward
 * compatibility. */

#include "e-settings-deprecated.h"

#include <shell/e-shell.h>
#include <mail/e-mail-enums.h>
#include <em-format/e-mail-formatter-enums.h>

#define E_SETTINGS_DEPRECATED_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_SETTINGS_DEPRECATED, ESettingsDeprecatedPrivate))

struct _ESettingsDeprecatedPrivate {
    GSettings *calendar_settings;
    gulong week_start_day_name_handler_id;
    gulong work_day_monday_handler_id;
    gulong work_day_tuesday_handler_id;
    gulong work_day_wednesday_handler_id;
    gulong work_day_thursday_handler_id;
    gulong work_day_friday_handler_id;
    gulong work_day_saturday_handler_id;
    gulong work_day_sunday_handler_id;

    GSettings *mail_settings;
    gulong browser_close_on_reply_policy_handler_id;
    gulong forward_style_name_handler_id;
    gulong reply_style_name_handler_id;
    gulong image_loading_policy_handler_id;
    gulong show_headers_handler_id;
};

/* Flag values used in the "working-days" key. */
enum {
    DEPRECATED_WORKING_DAYS_SUNDAY = 1 << 0,
    DEPRECATED_WORKING_DAYS_MONDAY = 1 << 1,
    DEPRECATED_WORKING_DAYS_TUESDAY = 1 << 2,
    DEPRECATED_WORKING_DAYS_WEDNESDAY = 1 << 3,
    DEPRECATED_WORKING_DAYS_THURSDAY = 1 << 4,
    DEPRECATED_WORKING_DAYS_FRIDAY = 1 << 5,
    DEPRECATED_WORKING_DAYS_SATURDAY = 1 << 6
};

G_DEFINE_DYNAMIC_TYPE (
    ESettingsDeprecated,
    e_settings_deprecated,
    E_TYPE_EXTENSION)

static void
settings_deprecated_header_start_element (GMarkupParseContext *context,
                                          const gchar *element_name,
                                          const gchar **attribute_names,
                                          const gchar **attribute_values,
                                          gpointer user_data,
                                          GError **error)
{
    GVariantBuilder *builder = user_data;
    const gchar *name = NULL;
    const gchar *enabled = NULL;

    /* The enabled flag is determined by the presence of an "enabled"
     * attribute, but the actual value of the "enabled" attribute, if
     * present, is just an empty string.  It's pretty convoluted. */
    g_markup_collect_attributes (
        element_name,
        attribute_names,
        attribute_values,
        error,
        G_MARKUP_COLLECT_STRING,
        "name", &name,
        G_MARKUP_COLLECT_STRING |
        G_MARKUP_COLLECT_OPTIONAL,
        "enabled", &enabled,
        G_MARKUP_COLLECT_INVALID);

    if (name != NULL)
        g_variant_builder_add (
            builder, "(sb)", name, (enabled != NULL));
}

static void
e_settings_deprecated_set_int_with_change_test (GSettings *settings,
                                                const gchar *key,
                                                gint value)
{
    if (g_settings_get_int (settings, key) != value)
        g_settings_set_int (settings, key, value);
}

static void
e_settings_deprecated_set_string_with_change_test (GSettings *settings,
                                                   const gchar *key,
                                                   const gchar *value)
{
    gchar *stored = g_settings_get_string (settings, key);

    if (g_strcmp0 (stored, value) != 0)
        g_settings_set_string (settings, key, value);

    g_free (stored);
}

static void
e_settings_deprecated_set_strv_with_change_test (GSettings *settings,
                                                 const gchar *key,
                                                 const gchar * const *value)
{
    gchar **stored = g_settings_get_strv (settings, key);
    gboolean changed;
    gint ii;

    changed = !stored || !value;
    for (ii = 0; !changed && stored[ii] && value[ii]; ii++) {
        changed = g_strcmp0 (stored[ii], value[ii]) != 0;
    }

    changed = changed || stored[ii] != NULL || value[ii] != NULL;

    if (changed)
        g_settings_set_strv (settings, key, value);

    g_strfreev (stored);
}

static void
settings_deprecated_header_parse_xml (const gchar *xml,
                                      GVariantBuilder *builder)
{
    static GMarkupParser parser = {
        settings_deprecated_header_start_element, };

    GMarkupParseContext *context;

    context = g_markup_parse_context_new (&parser, 0, builder, NULL);
    g_markup_parse_context_parse (context, xml, -1, NULL);
    g_markup_parse_context_end_parse (context, NULL);
    g_markup_parse_context_free (context);
}

static GVariant *
settings_deprecated_header_strv_to_variant (gchar **strv)
{
    GVariantBuilder builder;
    guint ii, length;

    length = g_strv_length (strv);

    /* Disregard an empty list. */
    if (length == 0)
        return NULL;

    g_variant_builder_init (&builder, G_VARIANT_TYPE ("a(sb)"));

    for (ii = 0; ii < length; ii++)
        settings_deprecated_header_parse_xml (strv[ii], &builder);

    return g_variant_builder_end (&builder);
}

static void
settings_deprecated_week_start_day_name_cb (GSettings *settings,
                                            const gchar *key)
{
    GDateWeekday weekday;
    gint tm_wday;

    weekday = g_settings_get_enum (settings, "week-start-day-name");
    tm_wday = e_weekday_to_tm_wday (weekday);
    e_settings_deprecated_set_int_with_change_test (settings, "week-start-day", tm_wday);
}

static void
settings_deprecated_work_day_monday_cb (GSettings *settings,
                                        const gchar *key)
{
    gint flags;

    flags = g_settings_get_int (settings, "working-days");
    if (g_settings_get_boolean (settings, "work-day-monday"))
        flags |= DEPRECATED_WORKING_DAYS_MONDAY;
    else
        flags &= ~DEPRECATED_WORKING_DAYS_MONDAY;
    e_settings_deprecated_set_int_with_change_test (settings, "working-days", flags);
}

static void
settings_deprecated_work_day_tuesday_cb (GSettings *settings,
                                         const gchar *key)
{
    gint flags;

    flags = g_settings_get_int (settings, "working-days");
    if (g_settings_get_boolean (settings, "work-day-tuesday"))
        flags |= DEPRECATED_WORKING_DAYS_TUESDAY;
    else
        flags &= ~DEPRECATED_WORKING_DAYS_TUESDAY;
    e_settings_deprecated_set_int_with_change_test (settings, "working-days", flags);
}

static void
settings_deprecated_work_day_wednesday_cb (GSettings *settings,
                                           const gchar *key)
{
    gint flags;

    flags = g_settings_get_int (settings, "working-days");
    if (g_settings_get_boolean (settings, "work-day-wednesday"))
        flags |= DEPRECATED_WORKING_DAYS_WEDNESDAY;
    else
        flags &= ~DEPRECATED_WORKING_DAYS_WEDNESDAY;
    e_settings_deprecated_set_int_with_change_test (settings, "working-days", flags);
}

static void
settings_deprecated_work_day_thursday_cb (GSettings *settings,
                                          const gchar *key)
{
    gint flags;

    flags = g_settings_get_int (settings, "working-days");
    if (g_settings_get_boolean (settings, "work-day-thursday"))
        flags |= DEPRECATED_WORKING_DAYS_THURSDAY;
    else
        flags &= ~DEPRECATED_WORKING_DAYS_THURSDAY;
    e_settings_deprecated_set_int_with_change_test (settings, "working-days", flags);
}

static void
settings_deprecated_work_day_friday_cb (GSettings *settings,
                                        const gchar *key)
{
    gint flags;

    flags = g_settings_get_int (settings, "working-days");
    if (g_settings_get_boolean (settings, "work-day-friday"))
        flags |= DEPRECATED_WORKING_DAYS_FRIDAY;
    else
        flags &= ~DEPRECATED_WORKING_DAYS_FRIDAY;
    e_settings_deprecated_set_int_with_change_test (settings, "working-days", flags);
}

static void
settings_deprecated_work_day_saturday_cb (GSettings *settings,
                                          const gchar *key)
{
    gint flags;

    flags = g_settings_get_int (settings, "working-days");
    if (g_settings_get_boolean (settings, "work-day-saturday"))
        flags |= DEPRECATED_WORKING_DAYS_SATURDAY;
    else
        flags &= ~DEPRECATED_WORKING_DAYS_SATURDAY;
    e_settings_deprecated_set_int_with_change_test (settings, "working-days", flags);
}

static void
settings_deprecated_work_day_sunday_cb (GSettings *settings,
                                        const gchar *key)
{
    gint flags;

    flags = g_settings_get_int (settings, "working-days");
    if (g_settings_get_boolean (settings, "work-day-sunday"))
        flags |= DEPRECATED_WORKING_DAYS_SUNDAY;
    else
        flags &= ~DEPRECATED_WORKING_DAYS_SUNDAY;
    e_settings_deprecated_set_int_with_change_test (settings, "working-days", flags);
}

static void
settings_deprecated_browser_close_on_reply_policy_cb (GSettings *settings,
                                                      const gchar *key)
{
    const gchar *deprecated_key = "prompt-on-reply-close-browser";

    switch (g_settings_get_enum (settings, key)) {
        case E_AUTOMATIC_ACTION_POLICY_ALWAYS:
            e_settings_deprecated_set_string_with_change_test (
                settings, deprecated_key, "always");
            break;
        case E_AUTOMATIC_ACTION_POLICY_NEVER:
            e_settings_deprecated_set_string_with_change_test (
                settings, deprecated_key, "never");
            break;
        default:
            e_settings_deprecated_set_string_with_change_test (
                settings, deprecated_key, "ask");
            break;
    }
}

static void
settings_deprecated_forward_style_name_cb (GSettings *settings,
                                           const gchar *key)
{
    EMailForwardStyle style;

    style = g_settings_get_enum (settings, "forward-style-name");
    e_settings_deprecated_set_int_with_change_test (settings, "forward-style", style);
}

static void
settings_deprecated_reply_style_name_cb (GSettings *settings,
                                         const gchar *key)
{
    EMailReplyStyle style;

    style = g_settings_get_enum (settings, "reply-style-name");
    e_settings_deprecated_set_int_with_change_test (settings, "reply-style", style);
}

static void
settings_deprecated_image_loading_policy_cb (GSettings *settings,
                                             const gchar *key)
{
    EMailImageLoadingPolicy policy;

    policy = g_settings_get_enum (settings, "image-loading-policy");
    e_settings_deprecated_set_int_with_change_test (settings, "load-http-images", policy);
}

static void
settings_deprecated_show_headers_cb (GSettings *settings,
                                     const gchar *key)
{
    GVariant *variant;
    gsize ii, n_children;
    gchar **strv = NULL;

    variant = g_settings_get_value (settings, key);
    n_children = g_variant_n_children (variant);

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

    for (ii = 0; ii < n_children; ii++) {
        const gchar *name = NULL;
        gboolean enabled = FALSE;

        g_variant_get_child (
            variant, ii, "(&sb)", &name, &enabled);

        strv[ii] = g_strdup_printf (
            "<?xml version=\"1.0\"?>\n"
            "<header name=\"%s\"%s/>\n",
            name, enabled ? " enabled=\"\"" : "");
    }

    e_settings_deprecated_set_strv_with_change_test (
        settings, "headers",
        (const gchar * const *) strv);

    g_strfreev (strv);

    g_variant_unref (variant);
}

static void
settings_deprecated_dispose (GObject *object)
{
    ESettingsDeprecatedPrivate *priv;

    priv = E_SETTINGS_DEPRECATED_GET_PRIVATE (object);

    if (priv->week_start_day_name_handler_id > 0) {
        g_signal_handler_disconnect (
            priv->calendar_settings,
            priv->week_start_day_name_handler_id);
        priv->week_start_day_name_handler_id = 0;
    }

    if (priv->work_day_monday_handler_id > 0) {
        g_signal_handler_disconnect (
            priv->calendar_settings,
            priv->work_day_monday_handler_id);
        priv->work_day_monday_handler_id = 0;
    }

    if (priv->work_day_tuesday_handler_id > 0) {
        g_signal_handler_disconnect (
            priv->calendar_settings,
            priv->work_day_tuesday_handler_id);
        priv->work_day_tuesday_handler_id = 0;
    }

    if (priv->work_day_wednesday_handler_id > 0) {
        g_signal_handler_disconnect (
            priv->calendar_settings,
            priv->work_day_wednesday_handler_id);
        priv->work_day_wednesday_handler_id = 0;
    }

    if (priv->work_day_thursday_handler_id > 0) {
        g_signal_handler_disconnect (
            priv->calendar_settings,
            priv->work_day_thursday_handler_id);
        priv->work_day_thursday_handler_id = 0;
    }

    if (priv->work_day_friday_handler_id > 0) {
        g_signal_handler_disconnect (
            priv->calendar_settings,
            priv->work_day_friday_handler_id);
        priv->work_day_friday_handler_id = 0;
    }

    if (priv->work_day_saturday_handler_id > 0) {
        g_signal_handler_disconnect (
            priv->calendar_settings,
            priv->work_day_saturday_handler_id);
        priv->work_day_saturday_handler_id = 0;
    }

    if (priv->work_day_sunday_handler_id > 0) {
        g_signal_handler_disconnect (
            priv->calendar_settings,
            priv->work_day_sunday_handler_id);
        priv->work_day_sunday_handler_id = 0;
    }

    if (priv->browser_close_on_reply_policy_handler_id > 0) {
        g_signal_handler_disconnect (
            priv->mail_settings,
            priv->browser_close_on_reply_policy_handler_id);
        priv->browser_close_on_reply_policy_handler_id = 0;
    }

    if (priv->forward_style_name_handler_id > 0) {
        g_signal_handler_disconnect (
            priv->mail_settings,
            priv->forward_style_name_handler_id);
        priv->forward_style_name_handler_id = 0;
    }

    if (priv->reply_style_name_handler_id > 0) {
        g_signal_handler_disconnect (
            priv->mail_settings,
            priv->reply_style_name_handler_id);
        priv->reply_style_name_handler_id = 0;
    }

    if (priv->image_loading_policy_handler_id > 0) {
        g_signal_handler_disconnect (
            priv->mail_settings,
            priv->image_loading_policy_handler_id);
        priv->image_loading_policy_handler_id = 0;
    }

    if (priv->show_headers_handler_id > 0) {
        g_signal_handler_disconnect (
            priv->mail_settings,
            priv->show_headers_handler_id);
        priv->show_headers_handler_id = 0;
    }

    g_clear_object (&priv->calendar_settings);
    g_clear_object (&priv->mail_settings);

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

static void
settings_deprecated_constructed (GObject *object)
{
    ESettingsDeprecatedPrivate *priv;
    GVariant *variant;
    gulong handler_id;
    gchar *string_value;
    gchar **strv_value;
    gint int_value;

    priv = E_SETTINGS_DEPRECATED_GET_PRIVATE (object);

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

    /* Migrate values from deprecated to preferred keys. */

    int_value = g_settings_get_int (
        priv->calendar_settings, "week-start-day");
    g_settings_set_enum (
        priv->calendar_settings, "week-start-day-name",
        e_weekday_from_tm_wday (int_value));

    int_value = g_settings_get_int (
        priv->calendar_settings, "working-days");
    g_settings_set_boolean (
        priv->calendar_settings, "work-day-monday",
        (int_value & DEPRECATED_WORKING_DAYS_MONDAY) != 0);
    g_settings_set_boolean (
        priv->calendar_settings, "work-day-tuesday",
        (int_value & DEPRECATED_WORKING_DAYS_TUESDAY) != 0);
    g_settings_set_boolean (
        priv->calendar_settings, "work-day-wednesday",
        (int_value & DEPRECATED_WORKING_DAYS_WEDNESDAY) != 0);
    g_settings_set_boolean (
        priv->calendar_settings, "work-day-thursday",
        (int_value & DEPRECATED_WORKING_DAYS_THURSDAY) != 0);
    g_settings_set_boolean (
        priv->calendar_settings, "work-day-friday",
        (int_value & DEPRECATED_WORKING_DAYS_FRIDAY) != 0);
    g_settings_set_boolean (
        priv->calendar_settings, "work-day-saturday",
        (int_value & DEPRECATED_WORKING_DAYS_SATURDAY) != 0);
    g_settings_set_boolean (
        priv->calendar_settings, "work-day-sunday",
        (int_value & DEPRECATED_WORKING_DAYS_SUNDAY) != 0);

    string_value = g_settings_get_string (
        priv->mail_settings, "prompt-on-reply-close-browser");
    if (g_strcmp0 (string_value, "always") == 0) {
        g_settings_set_enum (
            priv->mail_settings,
            "browser-close-on-reply-policy",
            E_AUTOMATIC_ACTION_POLICY_ALWAYS);
    } else if (g_strcmp0 (string_value, "never") == 0) {
        g_settings_set_enum (
            priv->mail_settings,
            "browser-close-on-reply-policy",
            E_AUTOMATIC_ACTION_POLICY_NEVER);
    } else {
        g_settings_set_enum (
            priv->mail_settings,
            "browser-close-on-reply-policy",
            E_AUTOMATIC_ACTION_POLICY_ASK);
    }
    g_free (string_value);

    int_value = g_settings_get_int (
        priv->mail_settings, "forward-style");
    g_settings_set_enum (
        priv->mail_settings, "forward-style-name", int_value);

    strv_value = g_settings_get_strv (priv->mail_settings, "headers");
    variant = settings_deprecated_header_strv_to_variant (strv_value);
    if (variant != NULL)
        g_settings_set_value (
            priv->mail_settings, "show-headers", variant);
    else
        g_settings_reset (priv->mail_settings, "show-headers");
    g_strfreev (strv_value);

    int_value = g_settings_get_int (
        priv->mail_settings, "reply-style");
    g_settings_set_enum (
        priv->mail_settings, "reply-style-name", int_value);

    int_value = g_settings_get_int (
        priv->mail_settings, "load-http-images");
    g_settings_set_enum (
        priv->mail_settings, "image-loading-policy", int_value);

    /* Write changes back to the deprecated keys. */

    handler_id = g_signal_connect (
        priv->calendar_settings, "changed::week-start-day-name",
        G_CALLBACK (settings_deprecated_week_start_day_name_cb), NULL);
    priv->week_start_day_name_handler_id = handler_id;

    handler_id = g_signal_connect (
        priv->calendar_settings, "changed::work-day-monday",
        G_CALLBACK (settings_deprecated_work_day_monday_cb), NULL);
    priv->work_day_monday_handler_id = handler_id;

    handler_id = g_signal_connect (
        priv->calendar_settings, "changed::work-day-tuesday",
        G_CALLBACK (settings_deprecated_work_day_tuesday_cb), NULL);
    priv->work_day_tuesday_handler_id = handler_id;

    handler_id = g_signal_connect (
        priv->calendar_settings, "changed::work-day-wednesday",
        G_CALLBACK (settings_deprecated_work_day_wednesday_cb), NULL);
    priv->work_day_wednesday_handler_id = handler_id;

    handler_id = g_signal_connect (
        priv->calendar_settings, "changed::work-day-thursday",
        G_CALLBACK (settings_deprecated_work_day_thursday_cb), NULL);
    priv->work_day_thursday_handler_id = handler_id;

    handler_id = g_signal_connect (
        priv->calendar_settings, "changed::work-day-friday",
        G_CALLBACK (settings_deprecated_work_day_friday_cb), NULL);
    priv->work_day_friday_handler_id = handler_id;

    handler_id = g_signal_connect (
        priv->calendar_settings, "changed::work-day-saturday",
        G_CALLBACK (settings_deprecated_work_day_saturday_cb), NULL);
    priv->work_day_saturday_handler_id = handler_id;

    handler_id = g_signal_connect (
        priv->calendar_settings, "changed::work-day-sunday",
        G_CALLBACK (settings_deprecated_work_day_sunday_cb), NULL);
    priv->work_day_sunday_handler_id = handler_id;

    handler_id = g_signal_connect (
        priv->mail_settings, "changed::browser-close-on-reply-policy",
        G_CALLBACK (settings_deprecated_browser_close_on_reply_policy_cb), NULL);
    priv->browser_close_on_reply_policy_handler_id = handler_id;

    handler_id = g_signal_connect (
        priv->mail_settings, "changed::forward-style-name",
        G_CALLBACK (settings_deprecated_forward_style_name_cb), NULL);
    priv->forward_style_name_handler_id = handler_id;

    handler_id = g_signal_connect (
        priv->mail_settings, "changed::reply-style-name",
        G_CALLBACK (settings_deprecated_reply_style_name_cb), NULL);
    priv->reply_style_name_handler_id = handler_id;

    handler_id = g_signal_connect (
        priv->mail_settings, "changed::image-loading-policy",
        G_CALLBACK (settings_deprecated_image_loading_policy_cb), NULL);
    priv->image_loading_policy_handler_id = handler_id;

    handler_id = g_signal_connect (
        priv->mail_settings, "changed::show-headers",
        G_CALLBACK (settings_deprecated_show_headers_cb), NULL);
    priv->show_headers_handler_id = handler_id;
}

static void
e_settings_deprecated_class_init (ESettingsDeprecatedClass *class)
{
    GObjectClass *object_class;
    EExtensionClass *extension_class;

    g_type_class_add_private (class, sizeof (ESettingsDeprecatedPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->dispose = settings_deprecated_dispose;
    object_class->constructed = settings_deprecated_constructed;

    extension_class = E_EXTENSION_CLASS (class);
    extension_class->extensible_type = E_TYPE_SHELL;
}

static void
e_settings_deprecated_class_finalize (ESettingsDeprecatedClass *class)
{
}

static void
e_settings_deprecated_init (ESettingsDeprecated *extension)
{
    GSettings *settings;

    extension->priv = E_SETTINGS_DEPRECATED_GET_PRIVATE (extension);

    settings = g_settings_new ("org.gnome.evolution.calendar");
    extension->priv->calendar_settings = settings;

    settings = g_settings_new ("org.gnome.evolution.mail");
    extension->priv->mail_settings = settings;
}

void
e_settings_deprecated_type_register (GTypeModule *type_module)
{
    /* XXX G_DEFINE_DYNAMIC_TYPE declares a static type registration
     *     function, so we have to wrap it with a public function in
     *     order to register types from a separate compilation unit. */
    e_settings_deprecated_register_type (type_module);
}