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Diffstat (limited to '')
| -rw-r--r-- | lib/event/manage.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/lib/event/manage.c b/lib/event/manage.c new file mode 100644 index 0000000..7d04a36 --- /dev/null +++ b/lib/event/manage.c @@ -0,0 +1,225 @@ +/* + 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; +} + +/* --------------------------------------------------------------------------------------------- */ |