/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ /* Evolution calendar - generic backend class * * Copyright (C) 2000 Ximian, Inc. * Copyright (C) 2000 Ximian, Inc. * * Authors: Federico Mena-Quintero * JP Rosevear * Rodrigo Moya * * This program is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU 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 General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. */ #include #include #include #include #include "cal-backend.h" #include "libversit/vcc.h" /* A category that exists in some of the objects of the calendar */ typedef struct { /* Category name, also used as the key in the categories hash table */ char *name; /* Number of objects that have this category */ int refcount; } CalBackendCategory; /* Private part of the CalBackend structure */ struct _CalBackendPrivate { /* The uri for this backend */ char *uri; /* The kind of components for this backend */ icalcomponent_kind kind; /* List of Cal objects */ GMutex *clients_mutex; GList *clients; GMutex *queries_mutex; EList *queries; /* Hash table of live categories, temporary hash of * added/removed categories, and idle handler for sending * category_changed. */ GHashTable *categories; GHashTable *changed_categories; guint category_idle_id; }; /* Property IDs */ enum props { PROP_0, PROP_URI, PROP_KIND }; /* Signal IDs */ enum { LAST_CLIENT_GONE, OPENED, REMOVED, LAST_SIGNAL }; static guint cal_backend_signals[LAST_SIGNAL]; static void cal_backend_class_init (CalBackendClass *class); static void cal_backend_init (CalBackend *backend); static void cal_backend_finalize (GObject *object); static void notify_categories_changed (CalBackend *backend); #define CLASS(backend) (CAL_BACKEND_CLASS (G_OBJECT_GET_CLASS (backend))) static GObjectClass *parent_class; /** * cal_backend_get_type: * @void: * * Registers the #CalBackend class if necessary, and returns the type ID * associated to it. * * Return value: The type ID of the #CalBackend class. **/ GType cal_backend_get_type (void) { static GType cal_backend_type = 0; if (!cal_backend_type) { static GTypeInfo info = { sizeof (CalBackendClass), (GBaseInitFunc) NULL, (GBaseFinalizeFunc) NULL, (GClassInitFunc) cal_backend_class_init, NULL, NULL, sizeof (CalBackend), 0, (GInstanceInitFunc) cal_backend_init, }; cal_backend_type = g_type_register_static (G_TYPE_OBJECT, "CalBackend", &info, 0); } return cal_backend_type; } static void cal_backend_set_property (GObject *object, guint property_id, const GValue *value, GParamSpec *pspec) { CalBackend *backend; CalBackendPrivate *priv; backend = CAL_BACKEND (object); priv = backend->priv; switch (property_id) { case PROP_URI: g_free (priv->uri); priv->uri = g_value_dup_string (value); break; case PROP_KIND: priv->kind = g_value_get_ulong (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } } static void cal_backend_get_property (GObject *object, guint property_id, GValue *value, GParamSpec *pspec) { CalBackend *backend; CalBackendPrivate *priv; backend = CAL_BACKEND (object); priv = backend->priv; switch (property_id) { case PROP_URI: g_value_set_string (value, cal_backend_get_uri (backend)); break; case PROP_KIND: g_value_set_ulong (value, cal_backend_get_kind (backend)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } } /* Class initialization function for the calendar backend */ static void cal_backend_class_init (CalBackendClass *class) { GObjectClass *object_class; parent_class = (GObjectClass *) g_type_class_peek_parent (class); object_class = (GObjectClass *) class; object_class->set_property = cal_backend_set_property; object_class->get_property = cal_backend_get_property; object_class->finalize = cal_backend_finalize; g_object_class_install_property (object_class, PROP_URI, g_param_spec_string ("uri", NULL, NULL, "", G_PARAM_READABLE | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY)); g_object_class_install_property (object_class, PROP_KIND, g_param_spec_ulong ("kind", NULL, NULL, ICAL_NO_COMPONENT, ICAL_XLICMIMEPART_COMPONENT, ICAL_NO_COMPONENT, G_PARAM_READABLE | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY)); cal_backend_signals[LAST_CLIENT_GONE] = g_signal_new ("last_client_gone", G_TYPE_FROM_CLASS (class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (CalBackendClass, last_client_gone), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); cal_backend_signals[OPENED] = g_signal_new ("opened", G_TYPE_FROM_CLASS (class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (CalBackendClass, opened), NULL, NULL, g_cclosure_marshal_VOID__ENUM, G_TYPE_NONE, 1, G_TYPE_INT); cal_backend_signals[REMOVED] = g_signal_new ("removed", G_TYPE_FROM_CLASS (class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (CalBackendClass, removed), NULL, NULL, g_cclosure_marshal_VOID__ENUM, G_TYPE_NONE, 1, G_TYPE_INT); class->last_client_gone = NULL; class->opened = NULL; class->obj_updated = NULL; class->get_cal_address = NULL; class->get_alarm_email_address = NULL; class->get_static_capabilities = NULL; class->open = NULL; class->is_loaded = NULL; class->is_read_only = NULL; class->start_query = NULL; class->get_mode = NULL; class->set_mode = NULL; class->get_object = NULL; class->get_default_object = NULL; class->get_object_list = NULL; class->get_free_busy = NULL; class->get_changes = NULL; class->discard_alarm = NULL; class->create_object = NULL; class->modify_object = NULL; class->remove_object = NULL; class->receive_objects = NULL; class->send_objects = NULL; class->get_timezone = NULL; class->add_timezone = NULL; class->set_default_timezone = NULL; } /* Object initialization func for the calendar backend */ void cal_backend_init (CalBackend *backend) { CalBackendPrivate *priv; priv = g_new0 (CalBackendPrivate, 1); backend->priv = priv; priv->clients = NULL; priv->clients_mutex = g_mutex_new (); /* FIXME bonobo_object_ref/unref? */ priv->queries = e_list_new((EListCopyFunc) g_object_ref, (EListFreeFunc) g_object_unref, NULL); priv->queries_mutex = g_mutex_new (); priv->categories = g_hash_table_new (g_str_hash, g_str_equal); priv->changed_categories = g_hash_table_new (g_str_hash, g_str_equal); } /* Used from g_hash_table_foreach(), frees a CalBackendCategory structure */ static void free_category_cb (gpointer key, gpointer value, gpointer data) { CalBackendCategory *c = value; g_free (c->name); g_free (c); } static gboolean prune_changed_categories (gpointer key, gpointer value, gpointer data) { CalBackendCategory *c = value; if (!c->refcount) free_category_cb (key, value, data); return TRUE; } void cal_backend_finalize (GObject *object) { CalBackend *backend = (CalBackend *)object; CalBackendPrivate *priv; priv = backend->priv; g_assert (priv->clients == NULL); g_object_unref (priv->queries); g_hash_table_foreach_remove (priv->changed_categories, prune_changed_categories, NULL); g_hash_table_destroy (priv->changed_categories); g_hash_table_foreach (priv->categories, free_category_cb, NULL); g_hash_table_destroy (priv->categories); g_mutex_free (priv->clients_mutex); g_mutex_free (priv->queries_mutex); if (priv->category_idle_id) g_source_remove (priv->category_idle_id); g_free (priv); G_OBJECT_CLASS (parent_class)->finalize (object); } /** * cal_backend_get_uri: * @backend: A calendar backend. * * Queries the URI of a calendar backend, which must already have an open * calendar. * * Return value: The URI where the calendar is stored. **/ const char * cal_backend_get_uri (CalBackend *backend) { CalBackendPrivate *priv; g_return_val_if_fail (backend != NULL, NULL); g_return_val_if_fail (IS_CAL_BACKEND (backend), NULL); priv = backend->priv; return priv->uri; } icalcomponent_kind cal_backend_get_kind (CalBackend *backend) { CalBackendPrivate *priv; g_return_val_if_fail (backend != NULL, ICAL_NO_COMPONENT); g_return_val_if_fail (IS_CAL_BACKEND (backend), ICAL_NO_COMPONENT); priv = backend->priv; return priv->kind; } static void cal_destroy_cb (gpointer data, GObject *where_cal_was) { CalBackend *backend = CAL_BACKEND (data); cal_backend_remove_client (backend, (Cal *) where_cal_was); } static void listener_died_cb (gpointer cnx, gpointer data) { Cal *cal = CAL (data); cal_backend_remove_client (cal_get_backend (cal), cal); } static void last_client_gone (CalBackend *backend) { g_signal_emit (backend, cal_backend_signals[LAST_CLIENT_GONE], 0); } void cal_backend_add_client (CalBackend *backend, Cal *cal) { CalBackendPrivate *priv; g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_return_if_fail (cal != NULL); g_return_if_fail (IS_CAL (cal)); priv = backend->priv; bonobo_object_set_immortal (BONOBO_OBJECT (cal), TRUE); g_object_weak_ref (G_OBJECT (cal), cal_destroy_cb, backend); ORBit_small_listen_for_broken (cal_get_listener (cal), G_CALLBACK (listener_died_cb), cal); g_mutex_lock (priv->clients_mutex); priv->clients = g_list_append (priv->clients, cal); g_mutex_unlock (priv->clients_mutex); /* Tell the new client about the list of categories. * (Ends up telling all the other clients too, but *shrug*.) */ /* FIXME This doesn't seem right at all */ notify_categories_changed (backend); } void cal_backend_remove_client (CalBackend *backend, Cal *cal) { CalBackendPrivate *priv; /* XXX this needs a bit more thinking wrt the mutex - we should be holding it when we check to see if clients is NULL */ g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_return_if_fail (cal != NULL); g_return_if_fail (IS_CAL (cal)); priv = backend->priv; /* Disconnect */ g_mutex_lock (priv->clients_mutex); priv->clients = g_list_remove (priv->clients, cal); g_mutex_unlock (priv->clients_mutex); /* When all clients go away, notify the parent factory about it so that * it may decide whether to kill the backend or not. */ if (!priv->clients) last_client_gone (backend); } void cal_backend_add_query (CalBackend *backend, Query *query) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_mutex_lock (backend->priv->queries_mutex); e_list_append (backend->priv->queries, query); g_mutex_unlock (backend->priv->queries_mutex); } EList * cal_backend_get_queries (CalBackend *backend) { g_return_val_if_fail (backend != NULL, NULL); g_return_val_if_fail (IS_CAL_BACKEND (backend), NULL); return g_object_ref (backend->priv->queries); } /** * cal_backend_get_cal_address: * @backend: A calendar backend. * * Queries the cal address associated with a calendar backend, which * must already have an open calendar. * * Return value: The cal address associated with the calendar. **/ void cal_backend_get_cal_address (CalBackend *backend, Cal *cal) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_assert (CLASS (backend)->get_cal_address != NULL); (* CLASS (backend)->get_cal_address) (backend, cal); } void cal_backend_get_alarm_email_address (CalBackend *backend, Cal *cal) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_assert (CLASS (backend)->get_alarm_email_address != NULL); (* CLASS (backend)->get_alarm_email_address) (backend, cal); } void cal_backend_get_ldap_attribute (CalBackend *backend, Cal *cal) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_assert (CLASS (backend)->get_ldap_attribute != NULL); (* CLASS (backend)->get_ldap_attribute) (backend, cal); } void cal_backend_get_static_capabilities (CalBackend *backend, Cal *cal) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_assert (CLASS (backend)->get_static_capabilities != NULL); (* CLASS (backend)->get_static_capabilities) (backend, cal); } /** * cal_backend_open: * @backend: A calendar backend. * @uristr: URI that contains the calendar data. * @only_if_exists: Whether the calendar should be opened only if it already * exists. If FALSE, a new calendar will be created when the specified @uri * does not exist. * * Opens a calendar backend with data from a calendar stored at the specified * URI. * * Return value: An operation status code. **/ void cal_backend_open (CalBackend *backend, Cal *cal, gboolean only_if_exists) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_assert (CLASS (backend)->open != NULL); (* CLASS (backend)->open) (backend, cal, only_if_exists); } void cal_backend_remove (CalBackend *backend, Cal *cal) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_assert (CLASS (backend)->remove != NULL); (* CLASS (backend)->remove) (backend, cal); } /** * cal_backend_is_loaded: * @backend: A calendar backend. * * Queries whether a calendar backend has been loaded yet. * * Return value: TRUE if the backend has been loaded with data, FALSE * otherwise. **/ gboolean cal_backend_is_loaded (CalBackend *backend) { gboolean result; g_return_val_if_fail (backend != NULL, FALSE); g_return_val_if_fail (IS_CAL_BACKEND (backend), FALSE); g_assert (CLASS (backend)->is_loaded != NULL); result = (* CLASS (backend)->is_loaded) (backend); return result; } /** * cal_backend_is_read_only * @backend: A calendar backend. * * Queries whether a calendar backend is read only or not. * * Return value: TRUE if the calendar is read only, FALSE otherwise. */ void cal_backend_is_read_only (CalBackend *backend, Cal *cal) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_assert (CLASS (backend)->is_read_only != NULL); (* CLASS (backend)->is_read_only) (backend, cal); } void cal_backend_start_query (CalBackend *backend, Query *query) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_assert (CLASS (backend)->start_query != NULL); (* CLASS (backend)->start_query) (backend, query); } /** * cal_backend_get_mode: * @backend: A calendar backend. * * Queries whether a calendar backend is connected remotely. * * Return value: The current mode the calendar is in **/ CalMode cal_backend_get_mode (CalBackend *backend) { CalMode result; g_return_val_if_fail (backend != NULL, FALSE); g_return_val_if_fail (IS_CAL_BACKEND (backend), FALSE); g_assert (CLASS (backend)->get_mode != NULL); result = (* CLASS (backend)->get_mode) (backend); return result; } /** * cal_backend_set_mode: * @backend: A calendar backend * @mode: Mode to change to * * Sets the mode of the calendar * **/ void cal_backend_set_mode (CalBackend *backend, CalMode mode) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_assert (CLASS (backend)->set_mode != NULL); (* CLASS (backend)->set_mode) (backend, mode); } void cal_backend_get_default_object (CalBackend *backend, Cal *cal) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_assert (CLASS (backend)->get_default_object != NULL); (* CLASS (backend)->get_default_object) (backend, cal); } /** * cal_backend_get_object: * @backend: A calendar backend. * @uid: Unique identifier for a calendar object. * @rid: ID for the object's recurrence to get. * * Queries a calendar backend for a calendar object based on its unique * identifier and its recurrence ID (if a recurrent appointment). * * Return value: The string representation of a complete calendar wrapping the * the sought object, or NULL if no object had the specified UID. **/ void cal_backend_get_object (CalBackend *backend, Cal *cal, const char *uid, const char *rid) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_return_if_fail (uid != NULL); g_assert (CLASS (backend)->get_object != NULL); (* CLASS (backend)->get_object) (backend, cal, uid, rid); } /** * cal_backend_get_object_list: * @backend: * @type: * * * * Return value: **/ void cal_backend_get_object_list (CalBackend *backend, Cal *cal, const char *sexp) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_assert (CLASS (backend)->get_object_list != NULL); return (* CLASS (backend)->get_object_list) (backend, cal, sexp); } /** * cal_backend_get_free_busy: * @backend: A calendar backend. * @users: List of users to get free/busy information for. * @start: Start time for query. * @end: End time for query. * * Gets a free/busy object for the given time interval * * Return value: a list of CalObj's **/ void cal_backend_get_free_busy (CalBackend *backend, Cal *cal, GList *users, time_t start, time_t end) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_return_if_fail (start != -1 && end != -1); g_return_if_fail (start <= end); g_assert (CLASS (backend)->get_free_busy != NULL); (* CLASS (backend)->get_free_busy) (backend, cal, users, start, end); } /** * cal_backend_get_changes: * @backend: A calendar backend * @type: Bitmask with types of objects to return. * @change_id: A unique uid for the callers change list * * Builds a sequence of objects and the type of change that occurred on them since * the last time the give change_id was seen * * Return value: A list of the objects that changed and the type of change **/ void cal_backend_get_changes (CalBackend *backend, Cal *cal, CalObjType type, const char *change_id) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_return_if_fail (change_id != NULL); g_assert (CLASS (backend)->get_changes != NULL); (* CLASS (backend)->get_changes) (backend, cal, type, change_id); } /** * cal_backend_discard_alarm * @backend: A calendar backend. * @uid: UID of the component to discard the alarm from. * @auid: Alarm ID. * * Discards an alarm from the given component. This allows the specific backend * to do whatever is needed to really discard the alarm. * **/ void cal_backend_discard_alarm (CalBackend *backend, Cal *cal, const char *uid, const char *auid) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_return_if_fail (uid != NULL); g_return_if_fail (auid != NULL); g_assert (CLASS (backend)->discard_alarm != NULL); (* CLASS (backend)->discard_alarm) (backend, cal, uid, auid); } void cal_backend_create_object (CalBackend *backend, Cal *cal, const char *calobj) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_return_if_fail (calobj != NULL); g_assert (CLASS (backend)->create_object != NULL); (* CLASS (backend)->create_object) (backend, cal, calobj); } void cal_backend_modify_object (CalBackend *backend, Cal *cal, const char *calobj, CalObjModType mod) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_return_if_fail (calobj != NULL); g_assert (CLASS (backend)->modify_object != NULL); (* CLASS (backend)->modify_object) (backend, cal, calobj, mod); } /** * cal_backend_remove_object: * @backend: A calendar backend. * @uid: Unique identifier of the object to remove. * @rid: A recurrence ID. * * Removes an object in a calendar backend. The backend will notify all of its * clients about the change. * **/ void cal_backend_remove_object (CalBackend *backend, Cal *cal, const char *uid, const char *rid, CalObjModType mod) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_return_if_fail (uid != NULL); g_assert (CLASS (backend)->remove_object != NULL); (* CLASS (backend)->remove_object) (backend, cal, uid, rid, mod); } void cal_backend_receive_objects (CalBackend *backend, Cal *cal, const char *calobj) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_return_if_fail (calobj != NULL); g_assert (CLASS (backend)->receive_objects != NULL); return (* CLASS (backend)->receive_objects) (backend, cal, calobj); } void cal_backend_send_objects (CalBackend *backend, Cal *cal, const char *calobj) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_return_if_fail (calobj != NULL); g_assert (CLASS (backend)->send_objects != NULL); return (* CLASS (backend)->send_objects) (backend, cal, calobj); } /** * cal_backend_opened: * @backend: A calendar backend. * @status: Open status code. * * Emits the "opened" signal of a calendar backend. This function is to be used * only by backend implementations. **/ void cal_backend_opened (CalBackend *backend, int status) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_signal_emit (G_OBJECT (backend), cal_backend_signals[OPENED], 0, status); } void cal_backend_removed (CalBackend *backend, int status) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_signal_emit (G_OBJECT (backend), cal_backend_signals[REMOVED], 0, status); } /** * cal_backend_get_timezone: * @backend: A calendar backend. * @tzid: Unique identifier of a VTIMEZONE object. Note that this must not be * NULL. * * Returns the icaltimezone* corresponding to the TZID, or NULL if the TZID * can't be found. * * Returns: The icaltimezone* corresponding to the given TZID, or NULL. **/ void cal_backend_get_timezone (CalBackend *backend, Cal *cal, const char *tzid) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_return_if_fail (tzid != NULL); g_assert (CLASS (backend)->get_timezone != NULL); (* CLASS (backend)->get_timezone) (backend, cal, tzid); } /** * cal_backend_set_default_timezone: * @backend: A calendar backend. * @tzid: The TZID identifying the timezone. * * Sets the default timezone for the calendar, which is used to resolve * DATE and floating DATE-TIME values. * * Returns: TRUE if the VTIMEZONE data for the timezone was found, or FALSE if * not. **/ void cal_backend_set_default_timezone (CalBackend *backend, Cal *cal, const char *tzid) { g_return_if_fail (backend != NULL); g_return_if_fail (IS_CAL_BACKEND (backend)); g_return_if_fail (tzid != NULL); g_assert (CLASS (backend)->set_default_timezone != NULL); (* CLASS (backend)->set_default_timezone) (backend, cal, tzid); } /** * cal_backend_add_timezone * @backend: A calendar backend. * @tzobj: The timezone object, in a string. * * Add a timezone object to the given backend. * * Returns: TRUE if successful, or FALSE if not. */ void cal_backend_add_timezone (CalBackend *backend, Cal *cal, const char *tzobj) { g_return_if_fail (IS_CAL_BACKEND (backend)); g_return_if_fail (tzobj != NULL); g_return_if_fail (CLASS (backend)->add_timezone != NULL); (* CLASS (backend)->add_timezone) (backend, cal, tzobj); } icaltimezone * cal_backend_internal_get_default_timezone (CalBackend *backend) { g_return_val_if_fail (IS_CAL_BACKEND (backend), NULL); g_return_val_if_fail (CLASS (backend)->internal_get_default_timezone != NULL, NULL); return (* CLASS (backend)->internal_get_default_timezone) (backend); } icaltimezone * cal_backend_internal_get_timezone (CalBackend *backend, const char *tzid) { g_return_val_if_fail (IS_CAL_BACKEND (backend), NULL); g_return_val_if_fail (tzid != NULL, NULL); g_return_val_if_fail (CLASS (backend)->internal_get_timezone != NULL, NULL); return (* CLASS (backend)->internal_get_timezone) (backend, tzid); } /** * cal_backend_notify_mode: * @backend: A calendar backend. * @status: Status of the mode set * @mode: the current mode * * Notifies each of the backend's listeners about the results of a * setMode call. **/ void cal_backend_notify_mode (CalBackend *backend, GNOME_Evolution_Calendar_Listener_SetModeStatus status, GNOME_Evolution_Calendar_CalMode mode) { CalBackendPrivate *priv = backend->priv; GList *l; for (l = priv->clients; l; l = l->next) cal_notify_mode (l->data, status, mode); } /** * cal_backend_notify_error: * @backend: A calendar backend. * @message: Error message * * Notifies each of the backend's listeners about an error **/ void cal_backend_notify_error (CalBackend *backend, const char *message) { CalBackendPrivate *priv = backend->priv; GList *l; for (l = priv->clients; l; l = l->next) cal_notify_error (l->data, message); } static void add_category_cb (gpointer name, gpointer category, gpointer data) { GNOME_Evolution_Calendar_StringSeq *seq = data; seq->_buffer[seq->_length++] = CORBA_string_dup (name); } static void notify_categories_changed (CalBackend *backend) { CalBackendPrivate *priv = backend->priv; GNOME_Evolution_Calendar_StringSeq *seq; GList *l; /* Build the sequence of category names */ seq = GNOME_Evolution_Calendar_StringSeq__alloc (); seq->_length = 0; seq->_maximum = g_hash_table_size (priv->categories); seq->_buffer = CORBA_sequence_CORBA_string_allocbuf (seq->_maximum); CORBA_sequence_set_release (seq, TRUE); g_hash_table_foreach (priv->categories, add_category_cb, seq); /* Notify the clients */ for (l = priv->clients; l; l = l->next) cal_notify_categories_changed (l->data, seq); CORBA_free (seq); } static gboolean idle_notify_categories_changed (gpointer data) { CalBackend *backend = CAL_BACKEND (data); CalBackendPrivate *priv = backend->priv; if (g_hash_table_size (priv->changed_categories)) { notify_categories_changed (backend); g_hash_table_foreach_remove (priv->changed_categories, prune_changed_categories, NULL); } priv->category_idle_id = 0; return FALSE; } /** * cal_backend_ref_categories: * @backend: A calendar backend * @categories: a list of categories * * Adds 1 to the refcount of each of the named categories. If any of * the categories are new, clients will be notified of the updated * category list at idle time. **/ void cal_backend_ref_categories (CalBackend *backend, GSList *categories) { CalBackendPrivate *priv; CalBackendCategory *c; const char *name; priv = backend->priv; while (categories) { name = categories->data; c = g_hash_table_lookup (priv->categories, name); if (c) c->refcount++; else { /* See if it was recently removed */ c = g_hash_table_lookup (priv->changed_categories, name); if (c && c->refcount == 0) { /* Move it back to the set of live categories */ g_hash_table_remove (priv->changed_categories, c->name); c->refcount = 1; g_hash_table_insert (priv->categories, c->name, c); } else { /* Create a new category */ c = g_new (CalBackendCategory, 1); c->name = g_strdup (name); c->refcount = 1; g_hash_table_insert (priv->categories, c->name, c); g_hash_table_insert (priv->changed_categories, c->name, c); } } categories = categories->next; } if (g_hash_table_size (priv->changed_categories) && !priv->category_idle_id) priv->category_idle_id = g_idle_add (idle_notify_categories_changed, backend); } /** * cal_backend_unref_categories: * @backend: A calendar backend * @categories: a list of categories * * Subtracts 1 from the refcount of each of the named categories. If * any of the refcounts go down to 0, clients will be notified of the * updated category list at idle time. **/ void cal_backend_unref_categories (CalBackend *backend, GSList *categories) { CalBackendPrivate *priv; CalBackendCategory *c; const char *name; priv = backend->priv; while (categories) { name = categories->data; c = g_hash_table_lookup (priv->categories, name); if (c) { g_assert (c != NULL); g_assert (c->refcount > 0); c->refcount--; if (c->refcount == 0) { g_hash_table_remove (priv->categories, c->name); g_hash_table_insert (priv->changed_categories, c->name, c); } } categories = categories->next; } if (g_hash_table_size (priv->changed_categories) && !priv->category_idle_id) priv->category_idle_id = g_idle_add (idle_notify_categories_changed, backend); }