lib/event/event.c

   1 /*
   2    Handle  events in application.
   3    Interface functions: init/deinit; start/stop
   4
   5    Copyright (C) 2011
   6    The Free Software Foundation, Inc.
   7
   8    Written by:
   9    Slava Zanko <slavazanko@gmail.com>, 2011.
  10
  11    This file is part of the Midnight Commander.
  12
  13    The Midnight Commander is free software: you can redistribute it
  14    and/or modify it under the terms of the GNU General Public License as
  15    published by the Free Software Foundation, either version 3 of the License,
  16    or (at your option) any later version.
  17
  18    The Midnight Commander is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25  */
  26
  27 #include <config.h>
  28
  29 #include "lib/global.h"
  30 #include "lib/event.h"
  31
  32 #include "internal.h"
  33
  34 /*** global variables ****************************************************************************/
  35
  36 /*** file scope macro definitions ****************************************************************/
  37
  38 /*** file scope type declarations ****************************************************************/
  39
  40 /*** file scope variables ************************************************************************/
  41
  42 GTree *mc_event_grouplist = NULL;
  43
  44 /*** file scope functions ************************************************************************/
  45 /* --------------------------------------------------------------------------------------------- */
  46 /*** public functions ****************************************************************************/
  47 /* --------------------------------------------------------------------------------------------- */
  48
  49 gboolean
  50 mc_event_init (GError ** mcerror)
  51 {
  52     if (mc_event_grouplist != NULL)
  53     {
  54         g_propagate_error (mcerror,
  55                            g_error_new (MC_ERROR, 1, _("Event system already initialized")));
  56         return FALSE;
  57     }
  58
  59     mc_event_grouplist =
  60         g_tree_new_full ((GCompareDataFunc) g_ascii_strcasecmp,
  61                          NULL, (GDestroyNotify) g_free, (GDestroyNotify) g_tree_destroy);
  62
  63     if (mc_event_grouplist == NULL)
  64     {
  65         g_propagate_error (mcerror,
  66                            g_error_new (MC_ERROR, 2, _("Failed to initialize event system")));
  67         return FALSE;
  68     }
  69
  70     return TRUE;
  71 }
  72
  73 /* --------------------------------------------------------------------------------------------- */
  74
  75 gboolean
  76 mc_event_deinit (GError ** mcerror)
  77 {
  78     if (mc_event_grouplist == NULL)
  79     {
  80         g_propagate_error (mcerror, g_error_new (MC_ERROR, 1, _("Event system not initialized")));
  81         return FALSE;
  82     }
  83
  84     g_tree_destroy (mc_event_grouplist);
  85     mc_event_grouplist = NULL;
  86     return TRUE;
  87 }
  88
  89 /* --------------------------------------------------------------------------------------------- */
  90
  91 gboolean
  92 mc_event_mass_add (event_init_t * events, GError ** mcerror)
  93 {
  94     size_t array_index;
  95
  96     for (array_index = 0; events[array_index].event_group_name != NULL; array_index++)
  97     {
  98         if (!mc_event_add (events[array_index].event_group_name,
  99                            events[array_index].event_name,
 100                            events[array_index].cb, events[array_index].init_data, mcerror))
 101         {
 102             return FALSE;
 103         }
 104     }
 105     return TRUE;
 106 }
 107
 108 /* --------------------------------------------------------------------------------------------- */
 109
 110 gboolean
 111 mc_event_present (const gchar * event_group_name, const gchar * event_name)
 112 {
 113     GTree *event_group;
 114     GPtrArray *callbacks;
 115
 116     if (mc_event_grouplist == NULL || event_group_name == NULL || event_name == NULL)
 117         return FALSE;
 118
 119     event_group = mc_event_get_event_group_by_name (event_group_name, FALSE, NULL);
 120     if (event_group == NULL)
 121         return FALSE;
 122
 123     callbacks = mc_event_get_event_by_name (event_group, event_name, FALSE, NULL);
 124     if (callbacks == NULL)
 125         return FALSE;
 126
 127     return TRUE;
 128 }
 129
 130 /* --------------------------------------------------------------------------------------------- */