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/*
Handle any events in application.
Manage events: add, delete, destroy, search
Copyright (C) 2011-2022
Free Software Foundation, Inc.
Written by:
Slava Zanko <slavazanko@gmail.com>, 2011.
This file is part of the Midnight Commander.
The Midnight Commander is free software: you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
The Midnight Commander 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 General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include "lib/global.h"
#include "lib/util.h"
#include "lib/event.h"
#include "internal.h"
/*** global variables ****************************************************************************/
/*** file scope macro definitions ****************************************************************/
/*** file scope type declarations ****************************************************************/
/*** file scope variables ************************************************************************/
/*** file scope functions ************************************************************************/
/* --------------------------------------------------------------------------------------------- */
static void
mc_event_group_destroy_value (gpointer data)
{
GPtrArray *callbacks;
callbacks = (GPtrArray *) data;
g_ptr_array_foreach (callbacks, (GFunc) g_free, NULL);
g_ptr_array_free (callbacks, TRUE);
}
/* --------------------------------------------------------------------------------------------- */
/* --------------------------------------------------------------------------------------------- */
/*** public functions ****************************************************************************/
/* --------------------------------------------------------------------------------------------- */
gboolean
mc_event_add (const gchar * event_group_name, const gchar * event_name,
mc_event_callback_func_t event_callback, gpointer event_init_data, GError ** mcerror)
{
GTree *event_group;
GPtrArray *callbacks;
mc_event_callback_t *cb;
mc_return_val_if_error (mcerror, FALSE);
if (mc_event_grouplist == NULL || event_group_name == NULL || event_name == NULL
|| event_callback == NULL)
{
mc_propagate_error (mcerror, 0, "%s", _("Check input data! Some of parameters are NULL!"));
return FALSE;
}
event_group = mc_event_get_event_group_by_name (event_group_name, TRUE, mcerror);
if (event_group == NULL)
return FALSE;
callbacks = mc_event_get_event_by_name (event_group, event_name, TRUE, mcerror);
if (callbacks == NULL)
return FALSE;
cb = mc_event_is_callback_in_array (callbacks, event_callback, event_init_data);
if (cb == NULL)
{
cb = g_new0 (mc_event_callback_t, 1);
cb->callback = event_callback;
g_ptr_array_add (callbacks, (gpointer) cb);
}
cb->init_data = event_init_data;
return TRUE;
}
/* --------------------------------------------------------------------------------------------- */
void
mc_event_del (const gchar * event_group_name, const gchar * event_name,
mc_event_callback_func_t event_callback, gpointer event_init_data)
{
GTree *event_group;
GPtrArray *callbacks;
mc_event_callback_t *cb;
if (mc_event_grouplist == NULL || event_group_name == NULL || event_name == NULL
|| event_callback == NULL)
return;
event_group = mc_event_get_event_group_by_name (event_group_name, FALSE, NULL);
if (event_group == NULL)
return;
callbacks = mc_event_get_event_by_name (event_group, event_name, FALSE, NULL);
if (callbacks == NULL)
return;
cb = mc_event_is_callback_in_array (callbacks, event_callback, event_init_data);
if (cb == NULL)
return;
g_ptr_array_remove (callbacks, (gpointer) cb);
g_free ((gpointer) cb);
}
/* --------------------------------------------------------------------------------------------- */
void
mc_event_destroy (const gchar * event_group_name, const gchar * event_name)
{
GTree *event_group;
if (mc_event_grouplist == NULL || event_group_name == NULL || event_name == NULL)
return;
event_group = mc_event_get_event_group_by_name (event_group_name, FALSE, NULL);
g_tree_remove (event_group, (gconstpointer) event_name);
}
/* --------------------------------------------------------------------------------------------- */
void
mc_event_group_del (const gchar * event_group_name)
{
if (mc_event_grouplist != NULL && event_group_name != NULL)
g_tree_remove (mc_event_grouplist, (gconstpointer) event_group_name);
}
/* --------------------------------------------------------------------------------------------- */
GTree *
mc_event_get_event_group_by_name (const gchar * event_group_name, gboolean create_new,
GError ** mcerror)
{
GTree *event_group;
mc_return_val_if_error (mcerror, FALSE);
event_group = (GTree *) g_tree_lookup (mc_event_grouplist, (gconstpointer) event_group_name);
if (event_group == NULL && create_new)
{
event_group =
g_tree_new_full ((GCompareDataFunc) g_ascii_strcasecmp,
NULL,
(GDestroyNotify) g_free,
(GDestroyNotify) mc_event_group_destroy_value);
if (event_group == NULL)
{
mc_propagate_error (mcerror, 0, _("Unable to create group '%s' for events!"),
event_group_name);
return NULL;
}
g_tree_insert (mc_event_grouplist, g_strdup (event_group_name), (gpointer) event_group);
}
return event_group;
}
/* --------------------------------------------------------------------------------------------- */
GPtrArray *
mc_event_get_event_by_name (GTree * event_group, const gchar * event_name, gboolean create_new,
GError ** mcerror)
{
GPtrArray *callbacks;
mc_return_val_if_error (mcerror, FALSE);
callbacks = (GPtrArray *) g_tree_lookup (event_group, (gconstpointer) event_name);
if (callbacks == NULL && create_new)
{
callbacks = g_ptr_array_new ();
if (callbacks == NULL)
{
mc_propagate_error (mcerror, 0, _("Unable to create event '%s'!"), event_name);
return NULL;
}
g_tree_insert (event_group, g_strdup (event_name), (gpointer) callbacks);
}
return callbacks;
}
/* --------------------------------------------------------------------------------------------- */
mc_event_callback_t *
mc_event_is_callback_in_array (GPtrArray * callbacks, mc_event_callback_func_t event_callback,
gpointer event_init_data)
{
guint array_index;
for (array_index = 0; array_index < callbacks->len; array_index++)
{
mc_event_callback_t *cb = g_ptr_array_index (callbacks, array_index);
if (cb->callback == event_callback && cb->init_data == event_init_data)
return cb;
}
return NULL;
}
/* --------------------------------------------------------------------------------------------- */
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