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/*
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* gnome-keyring
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*
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* Copyright (C) 2010 Stefan Walter
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gcr-collection.h"
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#include "gcr-filter-collection.h"
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#include <string.h>
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/**
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* SECTION:gcr-filter-collection
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* @title: GcrFilterCollection
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* @short_description: A collection which filters a GcrCollection
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*
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* An implementation of #GcrCollection which filters objects from another
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* underlying collection. Use gcr_filter_collection_new_with_callback()
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* to create a new filter collection.
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*
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* The callback will determine the criteria for whether an object shows through
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* the filter or not.
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*/
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/**
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* GcrFilterCollection:
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*
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* A filter implementation of #GcrCollection.
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*/
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/**
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* GcrFilterCollectionClass:
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* @parent_class: the parent class
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*
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* The class for #GcrFilterCollection.
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*/
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/**
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* GcrFilterCollectionFunc:
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* @object: object to filter
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* @user_data: user data passed to the callback
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*
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* A function which is called by #GcrFilterCollection in order to determine
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* whether an object should show through the filter or not.
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*
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* Returns: %TRUE if an object should be included in the filtered collection
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*/
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enum {
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PROP_0,
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PROP_UNDERLYING
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};
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struct _GcrFilterCollectionPrivate {
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GHashTable *items;
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GcrCollection *underlying;
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GcrFilterCollectionFunc filter_func;
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gpointer user_data;
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GDestroyNotify destroy_func;
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};
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static void gcr_filter_collection_iface (GcrCollectionIface *iface);
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G_DEFINE_TYPE_WITH_CODE (GcrFilterCollection, gcr_filter_collection, G_TYPE_OBJECT,
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G_IMPLEMENT_INTERFACE (GCR_TYPE_COLLECTION, gcr_filter_collection_iface));
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static void
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add_object (GcrFilterCollection *self,
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GObject *object)
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{
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g_assert (g_hash_table_lookup (self->pv->items, object) == NULL);
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g_hash_table_insert (self->pv->items, g_object_ref (object), object);
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gcr_collection_emit_added (GCR_COLLECTION (self), object);
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}
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static void
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remove_object (GcrFilterCollection *self,
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GObject *object)
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{
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g_object_ref (object);
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if (!g_hash_table_remove (self->pv->items, object))
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g_assert_not_reached ();
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gcr_collection_emit_removed (GCR_COLLECTION (self), object);
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g_object_unref (object);
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}
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static gboolean
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filter_object (GcrFilterCollection *self,
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GObject *object)
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{
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gboolean match = TRUE;
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if (self->pv->filter_func)
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match = (self->pv->filter_func) (object, self->pv->user_data);
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return match;
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}
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static void
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on_collection_added (GcrCollection *collection,
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GObject *object,
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gpointer user_data)
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{
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GcrFilterCollection *self = GCR_FILTER_COLLECTION (user_data);
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if (filter_object (self, object))
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add_object (self, object);
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}
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static void
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on_collection_removed (GcrCollection *collection,
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GObject *object,
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gpointer user_data)
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{
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GcrFilterCollection *self = GCR_FILTER_COLLECTION (user_data);
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if (g_hash_table_lookup (self->pv->items, object))
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remove_object (self, object);
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}
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static void
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gcr_filter_collection_init (GcrFilterCollection *self)
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{
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self->pv = G_TYPE_INSTANCE_GET_PRIVATE (self, GCR_TYPE_FILTER_COLLECTION, GcrFilterCollectionPrivate);
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self->pv->items = g_hash_table_new_full (g_direct_hash, g_direct_equal, g_object_unref, NULL);
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}
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static void
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gcr_filter_collection_set_property (GObject *obj,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GcrFilterCollection *self = GCR_FILTER_COLLECTION (obj);
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switch (property_id) {
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case PROP_UNDERLYING:
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g_return_if_fail (self->pv->underlying == NULL);
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self->pv->underlying = g_value_dup_object (value);
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g_return_if_fail (self->pv->underlying != NULL);
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g_signal_connect (self->pv->underlying, "added",
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G_CALLBACK (on_collection_added), self);
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g_signal_connect (self->pv->underlying, "removed",
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G_CALLBACK (on_collection_removed), self);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (obj, property_id, pspec);
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break;
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}
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}
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static void
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gcr_filter_collection_get_property (GObject *obj,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GcrFilterCollection *self = GCR_FILTER_COLLECTION (obj);
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switch (property_id) {
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case PROP_UNDERLYING:
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g_value_set_object (value, gcr_filter_collection_get_underlying (self));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (obj, property_id, pspec);
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break;
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}
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}
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static void
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gcr_filter_collection_finalize (GObject *obj)
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{
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GcrFilterCollection *self = GCR_FILTER_COLLECTION (obj);
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if (self->pv->underlying) {
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g_signal_handlers_disconnect_by_func (self->pv->underlying,
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on_collection_added, self);
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g_signal_handlers_disconnect_by_func (self->pv->underlying,
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on_collection_removed, self);
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g_object_unref (self->pv->underlying);
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}
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if (self->pv->destroy_func)
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(self->pv->destroy_func) (self->pv->user_data);
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g_assert (self->pv->items);
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g_hash_table_destroy (self->pv->items);
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self->pv->items = NULL;
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G_OBJECT_CLASS (gcr_filter_collection_parent_class)->finalize (obj);
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}
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static void
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gcr_filter_collection_class_init (GcrFilterCollectionClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->get_property = gcr_filter_collection_get_property;
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gobject_class->set_property = gcr_filter_collection_set_property;
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gobject_class->finalize = gcr_filter_collection_finalize;
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g_type_class_add_private (gobject_class, sizeof (GcrFilterCollectionPrivate));
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g_object_class_install_property (gobject_class, PROP_UNDERLYING,
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g_param_spec_object ("underlying", "Underlying", "Underlying collection",
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GCR_TYPE_COLLECTION, G_PARAM_STATIC_STRINGS |
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
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}
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static guint
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gcr_filter_collection_get_length (GcrCollection *coll)
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{
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GcrFilterCollection *self = GCR_FILTER_COLLECTION (coll);
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return g_hash_table_size (self->pv->items);
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}
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static GList*
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gcr_filter_collection_get_objects (GcrCollection *coll)
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{
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GcrFilterCollection *self = GCR_FILTER_COLLECTION (coll);
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return g_hash_table_get_keys (self->pv->items);
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}
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static gboolean
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gcr_filter_collection_contains (GcrCollection *collection,
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GObject *object)
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{
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GcrFilterCollection *self = GCR_FILTER_COLLECTION (collection);
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return g_hash_table_lookup (self->pv->items, object) ? TRUE : FALSE;
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}
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static void
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gcr_filter_collection_iface (GcrCollectionIface *iface)
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{
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iface->get_length = gcr_filter_collection_get_length;
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iface->get_objects = gcr_filter_collection_get_objects;
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iface->contains = gcr_filter_collection_contains;
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}
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/**
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* gcr_filter_collection_new_with_callback:
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* @underlying: the underlying collection
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* @callback: (allow-none): function to call for each object
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* @user_data: data to pass to the callback
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* @destroy_func: called for user_data when it is no longer needed
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*
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* Create a new #GcrFilterCollection.
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*
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* The callback should return %TRUE if an object should appear in the
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* filtered collection.
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*
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* If a %NULL callback is set, then all underlynig objects will appear in the
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* filtered collection.
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*
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* Returns: (transfer full) (type Gcr.FilterCollection): a newly allocated
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* filtered collection, which should be freed with g_object_unref()
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*/
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GcrCollection *
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gcr_filter_collection_new_with_callback (GcrCollection *underlying,
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GcrFilterCollectionFunc callback,
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gpointer user_data,
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GDestroyNotify destroy_func)
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{
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GcrCollection *collection;
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collection = g_object_new (GCR_TYPE_FILTER_COLLECTION,
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"underlying", underlying,
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NULL);
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gcr_filter_collection_set_callback (GCR_FILTER_COLLECTION (collection),
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callback, user_data, destroy_func);
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return collection;
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}
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/**
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* gcr_filter_collection_set_callback:
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* @self: a filter collection
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* @callback: (allow-none): function to call for each object
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* @user_data: data to pass to the callback
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* @destroy_func: called for user_data when it is no longer needed
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*
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* Set the callback used to filter the objects in the underlying collection.
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* The callback should return %TRUE if an object should appear in the
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* filtered collection.
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*
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* If a %NULL callback is set, then all underlynig objects will appear in the
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* filtered collection.
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*
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* This will refilter the collection.
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*/
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void
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gcr_filter_collection_set_callback (GcrFilterCollection *self,
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GcrFilterCollectionFunc callback,
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gpointer user_data,
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GDestroyNotify destroy_func)
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{
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g_return_if_fail (GCR_IS_FILTER_COLLECTION (self));
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b00eeb |
|
|
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b00eeb |
if (self->pv->destroy_func)
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(self->pv->destroy_func) (self->pv->user_data);
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self->pv->filter_func = callback;
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self->pv->user_data = user_data;
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self->pv->destroy_func = destroy_func;
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b00eeb |
|
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b00eeb |
gcr_filter_collection_refilter (self);
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b00eeb |
}
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b00eeb |
|
|
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/**
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* gcr_filter_collection_refilter:
|
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b00eeb |
* @self: a filter collection
|
|
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b00eeb |
*
|
|
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* Refilter all objects in the underlying collection. Call this function if
|
|
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b00eeb |
* the filter callback function changes its filtering criteria.
|
|
Packit |
b00eeb |
*/
|
|
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b00eeb |
void
|
|
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gcr_filter_collection_refilter (GcrFilterCollection *self)
|
|
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b00eeb |
{
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|
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b00eeb |
GList *objects = NULL;
|
|
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b00eeb |
GHashTable *snapshot;
|
|
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b00eeb |
GHashTableIter iter;
|
|
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b00eeb |
GObject *object;
|
|
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b00eeb |
gboolean have;
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|
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b00eeb |
gboolean should;
|
|
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b00eeb |
GList *l;
|
|
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b00eeb |
|
|
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b00eeb |
g_return_if_fail (GCR_IS_FILTER_COLLECTION (self));
|
|
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b00eeb |
|
|
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b00eeb |
snapshot = g_hash_table_new (g_direct_hash, g_direct_equal);
|
|
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b00eeb |
g_hash_table_iter_init (&iter, self->pv->items);
|
|
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b00eeb |
while (g_hash_table_iter_next (&iter, (gpointer *)&object, NULL))
|
|
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b00eeb |
g_hash_table_insert (snapshot, object, object);
|
|
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b00eeb |
|
|
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b00eeb |
if (self->pv->underlying)
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|
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objects = gcr_collection_get_objects (self->pv->underlying);
|
|
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b00eeb |
|
|
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for (l = objects; l != NULL; l = g_list_next (l)) {
|
|
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b00eeb |
have = g_hash_table_remove (snapshot, l->data);
|
|
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b00eeb |
should = filter_object (self, l->data);
|
|
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b00eeb |
if (have && !should)
|
|
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b00eeb |
remove_object (self, l->data);
|
|
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b00eeb |
else if (!have && should)
|
|
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b00eeb |
add_object (self, l->data);
|
|
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b00eeb |
}
|
|
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b00eeb |
|
|
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b00eeb |
g_hash_table_iter_init (&iter, snapshot);
|
|
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b00eeb |
while (g_hash_table_iter_next (&iter, (gpointer *)&object, NULL))
|
|
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b00eeb |
remove_object (self, object);
|
|
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b00eeb |
g_hash_table_destroy (snapshot);
|
|
Packit |
b00eeb |
|
|
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b00eeb |
g_list_free (objects);
|
|
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b00eeb |
}
|
|
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b00eeb |
|
|
Packit |
b00eeb |
/**
|
|
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b00eeb |
* gcr_filter_collection_get_underlying:
|
|
Packit |
b00eeb |
* @self: a filter collection
|
|
Packit |
b00eeb |
*
|
|
Packit |
b00eeb |
* Get the collection that is being filtered by this filter collection.
|
|
Packit |
b00eeb |
*
|
|
Packit |
b00eeb |
* Returns: (transfer none): the underlying collection
|
|
Packit |
b00eeb |
*/
|
|
Packit |
b00eeb |
GcrCollection *
|
|
Packit |
b00eeb |
gcr_filter_collection_get_underlying (GcrFilterCollection *self)
|
|
Packit |
b00eeb |
{
|
|
Packit |
b00eeb |
g_return_val_if_fail (GCR_IS_FILTER_COLLECTION (self), NULL);
|
|
Packit |
b00eeb |
return self->pv->underlying;
|
|
Packit |
b00eeb |
}
|