晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

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/*
 * Copyright © 2010 Codethink Limited
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 this library; if not, see <http://www.gnu.org/licenses/>.
 *
 * Authors: Ryan Lortie <desrt@desrt.ca>
 */

#ifndef __G_ACTION_H__
#define __G_ACTION_H__

#if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
#error "Only <gio/gio.h> can be included directly."
#endif

#include <gio/giotypes.h>

G_BEGIN_DECLS

#define G_TYPE_ACTION                                       (g_action_get_type ())
#define G_ACTION(inst)                                      (G_TYPE_CHECK_INSTANCE_CAST ((inst),                     \
                                                             G_TYPE_ACTION, GAction))
#define G_IS_ACTION(inst)                                   (G_TYPE_CHECK_INSTANCE_TYPE ((inst), G_TYPE_ACTION))
#define G_ACTION_GET_IFACE(inst)                            (G_TYPE_INSTANCE_GET_INTERFACE ((inst),                  \
                                                             G_TYPE_ACTION, GActionInterface))

typedef struct _GActionInterface                            GActionInterface;

struct _GActionInterface
{
  GTypeInterface g_iface;

  /* virtual functions */
  const gchar *        (* get_name)             (GAction  *action);
  const GVariantType * (* get_parameter_type)   (GAction  *action);
  const GVariantType * (* get_state_type)       (GAction  *action);
  GVariant *           (* get_state_hint)       (GAction  *action);

  gboolean             (* get_enabled)          (GAction  *action);
  GVariant *           (* get_state)            (GAction  *action);

  void                 (* change_state)         (GAction  *action,
                                                 GVariant *value);
  void                 (* activate)             (GAction  *action,
                                                 GVariant *parameter);
};

GLIB_AVAILABLE_IN_2_30
GType                   g_action_get_type                               (void) G_GNUC_CONST;

GLIB_AVAILABLE_IN_ALL
const gchar *           g_action_get_name                               (GAction            *action);
GLIB_AVAILABLE_IN_ALL
const GVariantType *    g_action_get_parameter_type                     (GAction            *action);
GLIB_AVAILABLE_IN_ALL
const GVariantType *    g_action_get_state_type                         (GAction            *action);
GLIB_AVAILABLE_IN_ALL
GVariant *              g_action_get_state_hint                         (GAction            *action);

GLIB_AVAILABLE_IN_ALL
gboolean                g_action_get_enabled                            (GAction            *action);
GLIB_AVAILABLE_IN_ALL
GVariant *              g_action_get_state                              (GAction            *action);

GLIB_AVAILABLE_IN_ALL
void                    g_action_change_state                           (GAction            *action,
                                                                         GVariant           *value);
GLIB_AVAILABLE_IN_ALL
void                    g_action_activate                               (GAction            *action,
                                                                         GVariant           *parameter);

GLIB_AVAILABLE_IN_2_28
gboolean                g_action_name_is_valid                          (const gchar        *action_name);

GLIB_AVAILABLE_IN_2_38
gboolean                g_action_parse_detailed_name                    (const gchar        *detailed_name,
                                                                         gchar             **action_name,
                                                                         GVariant          **target_value,
                                                                         GError            **error);

GLIB_AVAILABLE_IN_2_38
gchar *                 g_action_print_detailed_name                    (const gchar        *action_name,
                                                                         GVariant           *target_value);

G_END_DECLS

#endif /* __G_ACTION_H__ */