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path: root/libempathy-gtk/gossip-contact-list-store.c
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2005-2007 Imendio AB
 * Copyright (C) 2007 Collabora Ltd.
 *
 * This program 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 2 of the
 * License, or (at your option) any later version.
 *
 * 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.
 *
 * Authors: Mikael Hallendal <micke@imendio.com>
 *          Martyn Russell <martyn@imendio.com>
 *          Xavier Claessens <xclaesse@gmail.com>
 */

#include "config.h"

#include <string.h>

#include <glib.h>
#include <gtk/gtk.h>

#include <libempathy/gossip-debug.h>

#include "gossip-contact-list-store.h"
#include "gossip-contact-groups.h"
#include "gossip-ui-utils.h"

#define DEBUG_DOMAIN "ContactListStore"

/* Active users are those which have recently changed state
 * (e.g. online, offline or from normal to a busy state).
 */

/* Time user is shown as active */
#define ACTIVE_USER_SHOW_TIME 7000

/* Time after connecting which we wait before active users are enabled */
#define ACTIVE_USER_WAIT_TO_ENABLE_TIME 5000

#define GET_PRIV(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GOSSIP_TYPE_CONTACT_LIST_STORE, GossipContactListStorePriv))

struct _GossipContactListStorePriv {
    EmpathyContactList         *list;
    gboolean                    show_offline;
    gboolean                    show_avatars;
    gboolean                    is_compact;
    gboolean                    show_active;
    GossipContactListStoreSort  sort_criterium;

    GossipContactGroupsFunc     get_contact_groups;
    gpointer                    get_contact_groups_data;
};

typedef struct {
    GtkTreeIter  iter;
    const gchar *name;
    gboolean     found;
} FindGroup;

typedef struct {
    GossipContact *contact;
    gboolean       found;
    GList         *iters;
} FindContact;

typedef struct {
    GossipContactListStore *store;
    GossipContact          *contact;
    gboolean                remove;
} ShowActiveData;

static void             gossip_contact_list_store_class_init         (GossipContactListStoreClass *klass);
static void             gossip_contact_list_store_init               (GossipContactListStore      *list);
static void             contact_list_store_finalize                  (GObject                     *object);
static void             contact_list_store_get_property              (GObject                     *object,
                                      guint                        param_id,
                                      GValue                      *value,
                                      GParamSpec                  *pspec);
static void             contact_list_store_set_property              (GObject                     *object,
                                      guint                        param_id,
                                      const GValue                *value,
                                      GParamSpec                  *pspec);
static void             contact_list_store_setup                     (GossipContactListStore      *store);
static void             contact_list_store_contact_added_cb          (EmpathyContactList          *list_iface,
                                      GossipContact               *contact,
                                      GossipContactListStore      *store);
static void             contact_list_store_add_contact               (GossipContactListStore      *store,
                                      GossipContact               *contact);
static void             contact_list_store_contact_removed_cb        (EmpathyContactList          *list_iface,
                                      GossipContact               *contact,
                                      GossipContactListStore      *store);
static void             contact_list_store_remove_contact            (GossipContactListStore      *store,
                                      GossipContact               *contact);
static void             contact_list_store_contact_update            (GossipContactListStore      *store,
                                      GossipContact               *contact);
static void             contact_list_store_contact_groups_updated_cb (GossipContact               *contact,
                                      GParamSpec                  *param,
                                      GossipContactListStore      *store);
static void             contact_list_store_contact_updated_cb        (GossipContact               *contact,
                                      GParamSpec                  *param,
                                      GossipContactListStore      *store);
static void             contact_list_store_contact_set_active        (GossipContactListStore      *store,
                                      GossipContact               *contact,
                                      gboolean                     active,
                                      gboolean                     set_changed);
static ShowActiveData * contact_list_store_contact_active_new        (GossipContactListStore      *store,
                                      GossipContact               *contact,
                                      gboolean                     remove);
static void             contact_list_store_contact_active_free       (ShowActiveData              *data);
static gboolean         contact_list_store_contact_active_cb         (ShowActiveData              *data);
static gboolean         contact_list_store_get_group_foreach         (GtkTreeModel                *model,
                                      GtkTreePath                 *path,
                                      GtkTreeIter                 *iter,
                                      FindGroup                   *fg);
static void             contact_list_store_get_group                 (GossipContactListStore      *store,
                                      const gchar                 *name,
                                      GtkTreeIter                 *iter_group_to_set,
                                      GtkTreeIter                 *iter_separator_to_set,
                                      gboolean                    *created);
static gint             contact_list_store_state_sort_func           (GtkTreeModel                *model,
                                      GtkTreeIter                 *iter_a,
                                      GtkTreeIter                 *iter_b,
                                      gpointer                     user_data);
static gint             contact_list_store_name_sort_func            (GtkTreeModel                *model,
                                      GtkTreeIter                 *iter_a,
                                      GtkTreeIter                 *iter_b,
                                      gpointer                     user_data);
static gboolean         contact_list_store_find_contact_foreach      (GtkTreeModel                *model,
                                      GtkTreePath                 *path,
                                      GtkTreeIter                 *iter,
                                      FindContact                 *fc);
static GList *          contact_list_store_find_contact              (GossipContactListStore      *store,
                                      GossipContact               *contact);
static gboolean         contact_list_store_update_list_mode_foreach  (GtkTreeModel                *model,
                                      GtkTreePath                 *path,
                                      GtkTreeIter                 *iter,
                                      GossipContactListStore      *store);

enum {
    PROP_0,
    PROP_SHOW_OFFLINE,
    PROP_SHOW_AVATARS,
    PROP_IS_COMPACT,
    PROP_SORT_CRITERIUM
};

GType
gossip_contact_list_store_sort_get_type (void)
{
    static GType etype = 0;

    if (etype == 0) {
        static const GEnumValue values[] = {
            { GOSSIP_CONTACT_LIST_STORE_SORT_NAME, 
              "GOSSIP_CONTACT_LIST_STORE_SORT_NAME", 
              "name" },
            { GOSSIP_CONTACT_LIST_STORE_SORT_STATE, 
              "GOSSIP_CONTACT_LIST_STORE_SORT_STATE", 
              "state" },
            { 0, NULL, NULL }
        };

        etype = g_enum_register_static ("GossipContactListStoreSort", values);
    }

    return etype;
}

G_DEFINE_TYPE (GossipContactListStore, gossip_contact_list_store, GTK_TYPE_TREE_STORE);

static void
gossip_contact_list_store_class_init (GossipContactListStoreClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    object_class->finalize = contact_list_store_finalize;
    object_class->get_property = contact_list_store_get_property;
    object_class->set_property = contact_list_store_set_property;

    g_object_class_install_property (object_class,
                     PROP_SHOW_OFFLINE,
                     g_param_spec_boolean ("show-offline",
                                   "Show Offline",
                                   "Whether contact list should display "
                                   "offline contacts",
                                   FALSE,
                                   G_PARAM_READWRITE));
     g_object_class_install_property (object_class,
                      PROP_SHOW_AVATARS,
                      g_param_spec_boolean ("show-avatars",
                                "Show Avatars",
                                "Whether contact list should display "
                                "avatars for contacts",
                                TRUE,
                                G_PARAM_READWRITE));
    g_object_class_install_property (object_class,
                     PROP_IS_COMPACT,
                     g_param_spec_boolean ("is-compact",
                                   "Is Compact",
                                   "Whether the contact list is in compact mode or not",
                                   FALSE,
                                   G_PARAM_READWRITE));

    g_object_class_install_property (object_class,
                     PROP_SORT_CRITERIUM,
                     g_param_spec_enum ("sort-criterium",
                                "Sort citerium",
                                "The sort criterium to use for sorting the contact list",
                                GOSSIP_TYPE_CONTACT_LIST_STORE_SORT,
                                GOSSIP_CONTACT_LIST_STORE_SORT_NAME,
                                G_PARAM_READWRITE));

    g_type_class_add_private (object_class, sizeof (GossipContactListStorePriv));
}

static void
gossip_contact_list_store_init (GossipContactListStore *store)
{
    GossipContactListStorePriv *priv;

    priv = GET_PRIV (store);

    priv->is_compact = FALSE;
    priv->show_active = TRUE;
    priv->show_avatars = TRUE;
}

static void
contact_list_store_finalize (GObject *object)
{
    GossipContactListStorePriv *priv;

    priv = GET_PRIV (object);

    /* FIXME: disconnect all signals on the list and contacts */

    if (priv->list) {
        g_object_unref (priv->list);
    }

    G_OBJECT_CLASS (gossip_contact_list_store_parent_class)->finalize (object);
}

static void
contact_list_store_get_property (GObject    *object,
                 guint       param_id,
                 GValue     *value,
                 GParamSpec *pspec)
{
    GossipContactListStorePriv *priv;

    priv = GET_PRIV (object);

    switch (param_id) {
    case PROP_SHOW_OFFLINE:
        g_value_set_boolean (value, priv->show_offline);
        break;
    case PROP_SHOW_AVATARS:
        g_value_set_boolean (value, priv->show_avatars);
        break;
    case PROP_IS_COMPACT:
        g_value_set_boolean (value, priv->is_compact);
        break;
    case PROP_SORT_CRITERIUM:
        g_value_set_enum (value, priv->sort_criterium);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    };
}

static void
contact_list_store_set_property (GObject      *object,
                 guint         param_id,
                 const GValue *value,
                 GParamSpec   *pspec)
{
    GossipContactListStorePriv *priv;

    priv = GET_PRIV (object);

    switch (param_id) {
    case PROP_SHOW_OFFLINE:
        gossip_contact_list_store_set_show_offline (GOSSIP_CONTACT_LIST_STORE (object),
                                g_value_get_boolean (value));
        break;
    case PROP_SHOW_AVATARS:
        gossip_contact_list_store_set_show_avatars (GOSSIP_CONTACT_LIST_STORE (object),
                                g_value_get_boolean (value));
        break;
    case PROP_IS_COMPACT:
        gossip_contact_list_store_set_is_compact (GOSSIP_CONTACT_LIST_STORE (object),
                              g_value_get_boolean (value));
        break;
    case PROP_SORT_CRITERIUM:
        gossip_contact_list_store_set_sort_criterium (GOSSIP_CONTACT_LIST_STORE (object),
                                  g_value_get_enum (value));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    };
}

GossipContactListStore *
gossip_contact_list_store_new (EmpathyContactList *list_iface)
{
    GossipContactListStore     *store;
    GossipContactListStorePriv *priv;
    GList                      *contacts, *l;

    g_return_val_if_fail (EMPATHY_IS_CONTACT_LIST (list_iface), NULL);

    store = g_object_new (GOSSIP_TYPE_CONTACT_LIST_STORE, NULL);
    priv = GET_PRIV (store);

    contact_list_store_setup (store);
    priv->list = g_object_ref (list_iface);

    /* Signal connection. */
    g_signal_connect (priv->list,
              "contact-added",
              G_CALLBACK (contact_list_store_contact_added_cb),
              store);
    g_signal_connect (priv->list,
              "contact-removed",
              G_CALLBACK (contact_list_store_contact_removed_cb),
              store);

    /* Add contacts already created */
    contacts = empathy_contact_list_get_contacts (priv->list);
    for (l = contacts; l; l = l->next) {
        GossipContact *contact;

        contact = l->data;

        contact_list_store_contact_added_cb (priv->list, contact, store);

        g_object_unref (contact);
    }
    g_list_free (contacts);

    return store;
}

EmpathyContactList *
gossip_contact_list_store_get_list_iface (GossipContactListStore *store)
{
    GossipContactListStorePriv *priv;

    g_return_val_if_fail (GOSSIP_IS_CONTACT_LIST_STORE (store), FALSE);

    priv = GET_PRIV (store);

    return priv->list;
}

gboolean
gossip_contact_list_store_get_show_offline (GossipContactListStore *store)
{
    GossipContactListStorePriv *priv;

    g_return_val_if_fail (GOSSIP_IS_CONTACT_LIST_STORE (store), FALSE);

    priv = GET_PRIV (store);

    return priv->show_offline;
}

void
gossip_contact_list_store_set_show_offline (GossipContactListStore *store,
                        gboolean                show_offline)
{
    GossipContactListStorePriv *priv;
    GList                      *contacts, *l;
    gboolean                    show_active;

    g_return_if_fail (GOSSIP_IS_CONTACT_LIST_STORE (store));

    priv = GET_PRIV (store);

    priv->show_offline = show_offline;
    show_active = priv->show_active;

    /* Disable temporarily. */
    priv->show_active = FALSE;

    contacts = empathy_contact_list_get_contacts (priv->list);
    for (l = contacts; l; l = l->next) {
        GossipContact *contact;

        contact = GOSSIP_CONTACT (l->data);

        contact_list_store_contact_update (store, contact);
        
        g_object_unref (contact);
    }
    g_list_free (contacts);

    /* Restore to original setting. */
    priv->show_active = show_active;
}

gboolean
gossip_contact_list_store_get_show_avatars (GossipContactListStore *store)
{
    GossipContactListStorePriv *priv;

    g_return_val_if_fail (GOSSIP_IS_CONTACT_LIST_STORE (store), TRUE);

    priv = GET_PRIV (store);

    return priv->show_avatars;
}

void
gossip_contact_list_store_set_show_avatars (GossipContactListStore *store,
                        gboolean                show_avatars)
{
    GossipContactListStorePriv *priv;
    GtkTreeModel               *model;

    g_return_if_fail (GOSSIP_IS_CONTACT_LIST_STORE (store));

    priv = GET_PRIV (store);

    priv->show_avatars = show_avatars;

    model = GTK_TREE_MODEL (store);

    gtk_tree_model_foreach (model,
                (GtkTreeModelForeachFunc)
                contact_list_store_update_list_mode_foreach,
                store);
}

gboolean
gossip_contact_list_store_get_is_compact (GossipContactListStore *store)
{
    GossipContactListStorePriv *priv;

    g_return_val_if_fail (GOSSIP_IS_CONTACT_LIST_STORE (store), TRUE);

    priv = GET_PRIV (store);

    return priv->is_compact;
}

void
gossip_contact_list_store_set_is_compact (GossipContactListStore *store,
                      gboolean                is_compact)
{
    GossipContactListStorePriv *priv;
    GtkTreeModel               *model;

    g_return_if_fail (GOSSIP_IS_CONTACT_LIST_STORE (store));

    priv = GET_PRIV (store);

    priv->is_compact = is_compact;

    model = GTK_TREE_MODEL (store);

    gtk_tree_model_foreach (model,
                (GtkTreeModelForeachFunc)
                contact_list_store_update_list_mode_foreach,
                store);
}

GossipContactListStoreSort
gossip_contact_list_store_get_sort_criterium (GossipContactListStore *store)
{
    GossipContactListStorePriv *priv;

    g_return_val_if_fail (GOSSIP_IS_CONTACT_LIST_STORE (store), 0);

    priv = GET_PRIV (store);

    return priv->sort_criterium;
}

void
gossip_contact_list_store_set_sort_criterium (GossipContactListStore     *store,
                          GossipContactListStoreSort  sort_criterium)
{
    GossipContactListStorePriv *priv;

    g_return_if_fail (GOSSIP_IS_CONTACT_LIST_STORE (store));

    priv = GET_PRIV (store);

    priv->sort_criterium = sort_criterium;

    switch (sort_criterium) {
    case GOSSIP_CONTACT_LIST_STORE_SORT_STATE:
        gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (store),
                              COL_STATUS,
                              GTK_SORT_ASCENDING);
        break;
        
    case GOSSIP_CONTACT_LIST_STORE_SORT_NAME:
        gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (store),
                              COL_NAME,
                              GTK_SORT_ASCENDING);
        break;
    }
}

gboolean
gossip_contact_list_store_row_separator_func (GtkTreeModel *model,
                          GtkTreeIter  *iter,
                          gpointer      data)
{
    gboolean is_separator = FALSE;

    g_return_val_if_fail (GTK_IS_TREE_MODEL (model), FALSE);

    gtk_tree_model_get (model, iter,
                COL_IS_SEPARATOR, &is_separator,
                -1);

    return is_separator;
}

gchar *
gossip_contact_list_store_get_parent_group (GtkTreeModel *model,
                        GtkTreePath  *path,
                        gboolean     *path_is_group)
{
    GtkTreeIter  parent_iter, iter;
    gchar       *name = NULL;
    gboolean     is_group;

    g_return_val_if_fail (GTK_IS_TREE_MODEL (model), NULL);

    if (path_is_group) {
        *path_is_group = FALSE;
    }

    if (!gtk_tree_model_get_iter (model, &iter, path)) {
        return NULL;
    }

    gtk_tree_model_get (model, &iter,
                COL_IS_GROUP, &is_group,
                COL_NAME, &name,
                -1);

    if (!is_group) {
        g_free (name);
        name = NULL;

        if (!gtk_tree_model_iter_parent (model, &parent_iter, &iter)) {
            return NULL;
        }

        iter = parent_iter;

        gtk_tree_model_get (model, &iter,
                    COL_IS_GROUP, &is_group,
                    COL_NAME, &name,
                    -1);
        if (!is_group) {
            g_free (name);
            return NULL;
        }
    }

    if (path_is_group) {
        *path_is_group = TRUE;
    }

    return name;
}

gboolean
gossip_contact_list_store_search_equal_func (GtkTreeModel *model,
                         gint          column,
                         const gchar  *key,
                         GtkTreeIter  *iter,
                         gpointer      search_data)
{
    gchar    *name, *name_folded;
    gchar    *key_folded;
    gboolean  ret;

    g_return_val_if_fail (GTK_IS_TREE_MODEL (model), FALSE);

    if (!key) {
        return FALSE;
    }

    gtk_tree_model_get (model, iter, COL_NAME, &name, -1);

    if (!name) {
        return FALSE;
    }

    name_folded = g_utf8_casefold (name, -1);
    key_folded = g_utf8_casefold (key, -1);

    if (name_folded && key_folded && 
        strstr (name_folded, key_folded)) {
        ret = FALSE;
    } else {
        ret = TRUE;
    }

    g_free (name);
    g_free (name_folded);
    g_free (key_folded);

    return ret;
}

void
gossip_contact_list_store_set_contact_groups_func (GossipContactListStore  *store,
                           GossipContactGroupsFunc  func,
                           gpointer                 user_data)
{
    GossipContactListStorePriv *priv;
    GList                      *contacts, *l;

    g_return_if_fail (GOSSIP_IS_CONTACT_LIST_STORE (store));

    priv = GET_PRIV (store);

    if (func) {
        priv->get_contact_groups = func;
        priv->get_contact_groups_data = user_data;
    } else {
        priv->get_contact_groups = NULL;
        priv->get_contact_groups_data = NULL;
    }

    /* If we set a custom function to get contacts groups  we have to
     * disconnect our default notify::groups signal and wait for the user
     * to call himself gossip_contact_list_store_update_contact_groups ()
     * when needed. If func is NULL we come back to default.
     */
    contacts = empathy_contact_list_get_contacts (priv->list);
    for (l = contacts; l; l = l->next) {
        GossipContact *contact;

        contact = l->data;

        if (func) {
            g_signal_handlers_disconnect_by_func (contact, 
                                  G_CALLBACK (contact_list_store_contact_groups_updated_cb),
                                  store);
        } else {
            g_signal_connect (contact, "notify::groups",
                      G_CALLBACK (contact_list_store_contact_groups_updated_cb),
                      store);
        }

        gossip_contact_list_store_update_contact_groups (store, contact);

        g_object_unref (contact);
    }
    g_list_free (contacts);
}

void
gossip_contact_list_store_update_contact_groups (GossipContactListStore *store,
                         GossipContact          *contact)
{
    gossip_debug (DEBUG_DOMAIN, "Contact:'%s' updating groups",
              gossip_contact_get_name (contact));

    /* We do this to make sure the groups are correct, if not, we
     * would have to check the groups already set up for each
     * contact and then see what has been updated.
     */
    contact_list_store_remove_contact (store, contact);
    contact_list_store_add_contact (store, contact);
}

static void
contact_list_store_setup (GossipContactListStore *store)
{
    GossipContactListStorePriv *priv;
    GType                       types[] = {G_TYPE_STRING,       /* Status icon-name */
                           GDK_TYPE_PIXBUF,     /* Avatar pixbuf */
                           G_TYPE_BOOLEAN,      /* Avatar pixbuf visible */
                           G_TYPE_STRING,       /* Name */
                           G_TYPE_STRING,       /* Status string */
                           G_TYPE_BOOLEAN,      /* Show status */
                           GOSSIP_TYPE_CONTACT, /* Contact type */
                           G_TYPE_BOOLEAN,      /* Is group */
                           G_TYPE_BOOLEAN,      /* Is active */
                           G_TYPE_BOOLEAN,      /* Is online */
                           G_TYPE_BOOLEAN};     /* Is separator */
    
    priv = GET_PRIV (store);

    gtk_tree_store_set_column_types (GTK_TREE_STORE (store), COL_COUNT, types);

    /* Set up sorting */
    gtk_tree_sortable_set_sort_func (GTK_TREE_SORTABLE (store),
                     COL_NAME,
                     contact_list_store_name_sort_func,
                     store, NULL);
    gtk_tree_sortable_set_sort_func (GTK_TREE_SORTABLE (store),
                     COL_STATUS,
                     contact_list_store_state_sort_func,
                     store, NULL);

    gossip_contact_list_store_set_sort_criterium (store, priv->sort_criterium);
}

static void
contact_list_store_contact_added_cb (EmpathyContactList     *list_iface,
                     GossipContact          *contact,
                     GossipContactListStore *store)
{
    GossipContactListStorePriv *priv;

    priv = GET_PRIV (store);

    gossip_debug (DEBUG_DOMAIN, 
              "Contact:'%s' added",
              gossip_contact_get_name (contact));

    if (!priv->get_contact_groups) {
        g_signal_connect (contact, "notify::groups",
                  G_CALLBACK (contact_list_store_contact_groups_updated_cb),
                  store);
    }
    g_signal_connect (contact, "notify::presence",
              G_CALLBACK (contact_list_store_contact_updated_cb),
              store);
    g_signal_connect (contact, "notify::name",
              G_CALLBACK (contact_list_store_contact_updated_cb),
              store);
    g_signal_connect (contact, "notify::avatar",
              G_CALLBACK (contact_list_store_contact_updated_cb),
              store);
    g_signal_connect (contact, "notify::type",
              G_CALLBACK (contact_list_store_contact_updated_cb),
              store);

    contact_list_store_add_contact (store, contact);
}

static void
contact_list_store_add_contact (GossipContactListStore *store,
                GossipContact          *contact)
{
    GossipContactListStorePriv *priv;
    GtkTreeIter                 iter;
    GList                      *groups, *l;

    priv = GET_PRIV (store);
    
    if (!priv->show_offline && !gossip_contact_is_online (contact)) {
        return;
    }

    /* If no groups just add it at the top level. */
    if (priv->get_contact_groups) {
        groups = priv->get_contact_groups (contact,
                           priv->get_contact_groups_data);
    } else {
        groups = gossip_contact_get_groups (contact);
    }

    if (!groups) {
        gtk_tree_store_append (GTK_TREE_STORE (store), &iter, NULL);
        gtk_tree_store_set (GTK_TREE_STORE (store), &iter,
                    COL_NAME, gossip_contact_get_name (contact),
                    COL_CONTACT, contact,
                    COL_IS_GROUP, FALSE,
                    COL_IS_SEPARATOR, FALSE,
                    -1);
    }

    /* Else add to each group. */
    for (l = groups; l; l = l->next) {
        GtkTreeIter  iter_group;
        const gchar *name;

        name = l->data;
        if (!name) {
            continue;
        }

        contact_list_store_get_group (store, name, &iter_group, NULL, NULL);

        gtk_tree_store_insert_after (GTK_TREE_STORE (store), &iter,
                         &iter_group, NULL);
        gtk_tree_store_set (GTK_TREE_STORE (store), &iter,
                    COL_NAME, gossip_contact_get_name (contact),
                    COL_CONTACT, contact,
                    COL_IS_GROUP, FALSE,
                    COL_IS_SEPARATOR, FALSE,
                    -1);
    }

    contact_list_store_contact_update (store, contact);
}

static void
contact_list_store_contact_removed_cb (EmpathyContactList     *list_iface,
                       GossipContact          *contact,
                       GossipContactListStore *store)
{
    gossip_debug (DEBUG_DOMAIN, "Contact:'%s' removed",
              gossip_contact_get_name (contact));

    /* Disconnect signals */
    g_signal_handlers_disconnect_by_func (contact, 
                          G_CALLBACK (contact_list_store_contact_groups_updated_cb),
                          store);
    g_signal_handlers_disconnect_by_func (contact,
                          G_CALLBACK (contact_list_store_contact_updated_cb),
                          store);

    contact_list_store_remove_contact (store, contact);
}

static void
contact_list_store_remove_contact (GossipContactListStore *store,
                   GossipContact          *contact)
{
    GossipContactListStorePriv *priv;
    GtkTreeModel               *model;
    GList                      *iters, *l;

    priv = GET_PRIV (store);

    iters = contact_list_store_find_contact (store, contact);
    if (!iters) {
        return;
    }
    
    /* Clean up model */
    model = GTK_TREE_MODEL (store);

    for (l = iters; l; l = l->next) {
        GtkTreeIter parent;

        /* NOTE: it is only <= 2 here because we have
         * separators after the group name, otherwise it
         * should be 1. 
         */
        if (gtk_tree_model_iter_parent (model, &parent, l->data) &&
            gtk_tree_model_iter_n_children (model, &parent) <= 2) {
            gtk_tree_store_remove (GTK_TREE_STORE (store), &parent);
        } else {
            gtk_tree_store_remove (GTK_TREE_STORE (store), l->data);
        }
    }

    g_list_foreach (iters, (GFunc) gtk_tree_iter_free, NULL);
    g_list_free (iters);
}

static void
contact_list_store_contact_update (GossipContactListStore *store,
                   GossipContact          *contact)
{
    GossipContactListStorePriv *priv;
    ShowActiveData             *data;
    GtkTreeModel               *model;
    GList                      *iters, *l;
    gboolean                    in_list;
    gboolean                    should_be_in_list;
    gboolean                    was_online = TRUE;
    gboolean                    now_online = FALSE;
    gboolean                    set_model = FALSE;
    gboolean                    do_remove = FALSE;
    gboolean                    do_set_active = FALSE;
    gboolean                    do_set_refresh = FALSE;
    GdkPixbuf                  *pixbuf_avatar;

    priv = GET_PRIV (store);

    model = GTK_TREE_MODEL (store);

    iters = contact_list_store_find_contact (store, contact);
    if (!iters) {
        in_list = FALSE;
    } else {
        in_list = TRUE;
    }

    /* Get online state now. */
    now_online = gossip_contact_is_online (contact);

    if (priv->show_offline || now_online) {
        should_be_in_list = TRUE;
    } else {
        should_be_in_list = FALSE;
    }

    if (!in_list && !should_be_in_list) {
        /* Nothing to do. */
        gossip_debug (DEBUG_DOMAIN,
                  "Contact:'%s' in list:NO, should be:NO",
                  gossip_contact_get_name (contact));

        g_list_foreach (iters, (GFunc) gtk_tree_iter_free, NULL);
        g_list_free (iters);
        return;
    }
    else if (in_list && !should_be_in_list) {
        gossip_debug (DEBUG_DOMAIN,
                  "Contact:'%s' in list:YES, should be:NO",
                  gossip_contact_get_name (contact));

        if (priv->show_active) {
            do_remove = TRUE;
            do_set_active = TRUE;
            do_set_refresh = TRUE;

            set_model = TRUE;
            gossip_debug (DEBUG_DOMAIN, "Remove item (after timeout)");
        } else {
            gossip_debug (DEBUG_DOMAIN, "Remove item (now)!");
            contact_list_store_remove_contact (store, contact);
        }
    }
    else if (!in_list && should_be_in_list) {
        gossip_debug (DEBUG_DOMAIN,
                  "Contact:'%s' in list:NO, should be:YES",
                  gossip_contact_get_name (contact));

        contact_list_store_add_contact (store, contact);

        if (priv->show_active) {
            do_set_active = TRUE;

            gossip_debug (DEBUG_DOMAIN, "Set active (contact added)");
        }
    } else {
        gossip_debug (DEBUG_DOMAIN,
                  "Contact:'%s' in list:YES, should be:YES",
                  gossip_contact_get_name (contact));

        /* Get online state before. */
        if (iters && g_list_length (iters) > 0) {
            gtk_tree_model_get (model, iters->data,
                        COL_IS_ONLINE, &was_online,
                        -1);
        }

        /* Is this really an update or an online/offline. */
        if (priv->show_active) {
            if (was_online != now_online) {
                do_set_active = TRUE;
                do_set_refresh = TRUE;

                gossip_debug (DEBUG_DOMAIN, "Set active (contact updated %s)",
                          was_online ? "online  -> offline" :
                               "offline -> online");
            } else {
                /* Was TRUE for presence updates. */
                /* do_set_active = FALSE;  */
                do_set_refresh = TRUE;

                gossip_debug (DEBUG_DOMAIN, "Set active (contact updated)");
            }
        }

        set_model = TRUE;
    }

    pixbuf_avatar = gossip_pixbuf_avatar_from_contact_scaled (contact, 32, 32);
    for (l = iters; l && set_model; l = l->next) {
        gtk_tree_store_set (GTK_TREE_STORE (store), l->data,
                    COL_ICON_STATUS, gossip_icon_name_for_contact (contact),
                    COL_PIXBUF_AVATAR, pixbuf_avatar,
                    COL_PIXBUF_AVATAR_VISIBLE, priv->show_avatars,
                    COL_NAME, gossip_contact_get_name (contact),
                    COL_STATUS, gossip_contact_get_status (contact),
                    COL_STATUS_VISIBLE, !priv->is_compact,
                    COL_IS_GROUP, FALSE,
                    COL_IS_ONLINE, now_online,
                    COL_IS_SEPARATOR, FALSE,
                    -1);
    }

    if (pixbuf_avatar) {
        g_object_unref (pixbuf_avatar);
    }

    if (priv->show_active && do_set_active) {
        contact_list_store_contact_set_active (store, contact, do_set_active, do_set_refresh);

        if (do_set_active) {
            data = contact_list_store_contact_active_new (store, contact, do_remove);
            g_timeout_add (ACTIVE_USER_SHOW_TIME,
                       (GSourceFunc) contact_list_store_contact_active_cb,
                       data);
        }
    }

    /* FIXME: when someone goes online then offline quickly, the
     * first timeout sets the user to be inactive and the second
     * timeout removes the user from the contact list, really we
     * should remove the first timeout.
     */
    g_list_foreach (iters, (GFunc) gtk_tree_iter_free, NULL);
    g_list_free (iters);
}

static void
contact_list_store_contact_groups_updated_cb (GossipContact          *contact,
                          GParamSpec             *param,
                          GossipContactListStore *store)
{
    gossip_contact_list_store_update_contact_groups (store, contact);
}

static void
contact_list_store_contact_updated_cb (GossipContact          *contact,
                       GParamSpec             *param,
                       GossipContactListStore *store)
{
    gossip_debug (DEBUG_DOMAIN,
              "Contact:'%s' updated, checking roster is in sync...",
              gossip_contact_get_name (contact));

    contact_list_store_contact_update (store, contact);
}

static void
contact_list_store_contact_set_active (GossipContactListStore *store,
                       GossipContact          *contact,
                       gboolean                active,
                       gboolean                set_changed)
{
    GossipContactListStorePriv *priv;
    GtkTreeModel               *model;
    GList                      *iters, *l;

    priv = GET_PRIV (store);
    model = GTK_TREE_MODEL (store);

    iters = contact_list_store_find_contact (store, contact);
    for (l = iters; l; l = l->next) {
        GtkTreePath *path;

        gtk_tree_store_set (GTK_TREE_STORE (store), l->data,
                    COL_IS_ACTIVE, active,
                    -1);

        gossip_debug (DEBUG_DOMAIN, "Set item %s", active ? "active" : "inactive");

        if (set_changed) {
            path = gtk_tree_model_get_path (model, l->data);
            gtk_tree_model_row_changed (model, path, l->data);
            gtk_tree_path_free (path);
        }
    }

    g_list_foreach (iters, (GFunc) gtk_tree_iter_free, NULL);
    g_list_free (iters);

}

static ShowActiveData *
contact_list_store_contact_active_new (GossipContactListStore *store,
                       GossipContact          *contact,
                       gboolean                remove)
{
    ShowActiveData *data;

    gossip_debug (DEBUG_DOMAIN, 
              "Contact:'%s' now active, and %s be removed",
              gossip_contact_get_name (contact), 
              remove ? "WILL" : "WILL NOT");
    
    data = g_slice_new0 (ShowActiveData);

    data->store = g_object_ref (store);
    data->contact = g_object_ref (contact);
    data->remove = remove;

    return data;
}

static void
contact_list_store_contact_active_free (ShowActiveData *data)
{
    g_object_unref (data->contact);
    g_object_unref (data->store);

    g_slice_free (ShowActiveData, data);
}

static gboolean
contact_list_store_contact_active_cb (ShowActiveData *data)
{
    GossipContactListStorePriv *priv;

    priv = GET_PRIV (data->store);

    if (data->remove &&
        !priv->show_offline &&
        !gossip_contact_is_online (data->contact)) {
        gossip_debug (DEBUG_DOMAIN, 
                  "Contact:'%s' active timeout, removing item",
                  gossip_contact_get_name (data->contact));
        contact_list_store_remove_contact (data->store, data->contact);
    }

    gossip_debug (DEBUG_DOMAIN, 
              "Contact:'%s' no longer active",
              gossip_contact_get_name (data->contact));

    contact_list_store_contact_set_active (data->store,
                           data->contact,
                           FALSE,
                           TRUE);

    contact_list_store_contact_active_free (data);

    return FALSE;
}

static gboolean
contact_list_store_get_group_foreach (GtkTreeModel *model,
                      GtkTreePath  *path,
                      GtkTreeIter  *iter,
                      FindGroup    *fg)
{
    gchar    *str;
    gboolean  is_group;

    /* Groups are only at the top level. */
    if (gtk_tree_path_get_depth (path) != 1) {
        return FALSE;
    }

    gtk_tree_model_get (model, iter,
                COL_NAME, &str,
                COL_IS_GROUP, &is_group,
                -1);

    if (is_group && strcmp (str, fg->name) == 0) {
        fg->found = TRUE;
        fg->iter = *iter;
    }

    g_free (str);

    return fg->found;
}

static void
contact_list_store_get_group (GossipContactListStore *store,
                  const gchar       *name,
                  GtkTreeIter       *iter_group_to_set,
                  GtkTreeIter       *iter_separator_to_set,
                  gboolean          *created)
{
    GossipContactListStorePriv *priv;
    GtkTreeModel               *model;
    GtkTreeIter                 iter_group;
    GtkTreeIter                 iter_separator;
    FindGroup                   fg;

    priv = GET_PRIV (store);

    memset (&fg, 0, sizeof (fg));

    fg.name = name;

    model = GTK_TREE_MODEL (store);
    gtk_tree_model_foreach (model,
                (GtkTreeModelForeachFunc) contact_list_store_get_group_foreach,
                &fg);

    if (!fg.found) {
        if (created) {
            *created = TRUE;
        }

        gtk_tree_store_append (GTK_TREE_STORE (store), &iter_group, NULL);
        gtk_tree_store_set (GTK_TREE_STORE (store), &iter_group,
                    COL_ICON_STATUS, NULL,
                    COL_NAME, name,
                    COL_IS_GROUP, TRUE,
                    COL_IS_ACTIVE, FALSE,
                    COL_IS_SEPARATOR, FALSE,
                    -1);

        if (iter_group_to_set) {
            *iter_group_to_set = iter_group;
        }

        gtk_tree_store_append (GTK_TREE_STORE (store),
                       &iter_separator, 
                       &iter_group);
        gtk_tree_store_set (GTK_TREE_STORE (store), &iter_separator,
                    COL_IS_SEPARATOR, TRUE,
                    -1);

        if (iter_separator_to_set) {
            *iter_separator_to_set = iter_separator;
        }
    } else {
        if (created) {
            *created = FALSE;
        }

        if (iter_group_to_set) {
            *iter_group_to_set = fg.iter;
        }

        iter_separator = fg.iter;

        if (gtk_tree_model_iter_next (model, &iter_separator)) {
            gboolean is_separator;

            gtk_tree_model_get (model, &iter_separator,
                        COL_IS_SEPARATOR, &is_separator,
                        -1);

            if (is_separator && iter_separator_to_set) {
                *iter_separator_to_set = iter_separator;
            }
        }
    }
}

static gint
contact_list_store_state_sort_func (GtkTreeModel *model,
                    GtkTreeIter  *iter_a,
                    GtkTreeIter  *iter_b,
                    gpointer      user_data)
{
    gint            ret_val = 0;
    gchar          *name_a, *name_b;
    gboolean        is_separator_a, is_separator_b;
    GossipContact  *contact_a, *contact_b;
    GossipPresence *presence_a, *presence_b;
    McPresence      state_a, state_b;

    gtk_tree_model_get (model, iter_a,
                COL_NAME, &name_a,
                COL_CONTACT, &contact_a,
                COL_IS_SEPARATOR, &is_separator_a,
                -1);
    gtk_tree_model_get (model, iter_b,
                COL_NAME, &name_b,
                COL_CONTACT, &contact_b,
                COL_IS_SEPARATOR, &is_separator_b,
                -1);

    /* Separator or group? */
    if (is_separator_a || is_separator_b) {
        if (is_separator_a) {
            ret_val = -1;
        } else if (is_separator_b) {
            ret_val = 1;
        }
    } else if (!contact_a && contact_b) {
        ret_val = 1;
    } else if (contact_a && !contact_b) {
        ret_val = -1;
    } else if (!contact_a && !contact_b) {
        /* Handle groups */
        ret_val = g_utf8_collate (name_a, name_b);
    }

    if (ret_val) {
        goto free_and_out;
    }

    /* If we managed to get this far, we can start looking at
     * the presences.
     */
    presence_a = gossip_contact_get_presence (GOSSIP_CONTACT (contact_a));
    presence_b = gossip_contact_get_presence (GOSSIP_CONTACT (contact_b));

    if (!presence_a && presence_b) {
        ret_val = 1;
    } else if (presence_a && !presence_b) {
        ret_val = -1;
    } else if (!presence_a && !presence_b) {
        /* Both offline, sort by name */
        ret_val = g_utf8_collate (name_a, name_b);
    } else {
        state_a = gossip_presence_get_state (presence_a);
        state_b = gossip_presence_get_state (presence_b);

        if (state_a < state_b) {
            ret_val = -1;
        } else if (state_a > state_b) {
            ret_val = 1;
        } else {
            /* Fallback: compare by name */
            ret_val = g_utf8_collate (name_a, name_b);
        }
    }

free_and_out:
    g_free (name_a);
    g_free (name_b);

    if (contact_a) {
        g_object_unref (contact_a);
    }

    if (contact_b) {
        g_object_unref (contact_b);
    }

    return ret_val;
}

static gint
contact_list_store_name_sort_func (GtkTreeModel *model,
                   GtkTreeIter  *iter_a,
                   GtkTreeIter  *iter_b,
                   gpointer      user_data)
{
    gchar         *name_a, *name_b;
    GossipContact *contact_a, *contact_b;
    gboolean       is_separator_a, is_separator_b;
    gint           ret_val;

    gtk_tree_model_get (model, iter_a,
                COL_NAME, &name_a,
                COL_CONTACT, &contact_a,
                COL_IS_SEPARATOR, &is_separator_a,
                -1);
    gtk_tree_model_get (model, iter_b,
                COL_NAME, &name_b,
                COL_CONTACT, &contact_b,
                COL_IS_SEPARATOR, &is_separator_b,
                -1);

    /* If contact is NULL it means it's a group. */

    if (is_separator_a || is_separator_b) {
        if (is_separator_a) {
            ret_val = -1;
        } else if (is_separator_b) {
            ret_val = 1;
        }
    } else if (!contact_a && contact_b) {
        ret_val = 1;
    } else if (contact_a && !contact_b) {
        ret_val = -1;
    } else {
        ret_val = g_utf8_collate (name_a, name_b);
    }

    g_free (name_a);
    g_free (name_b);

    if (contact_a) {
        g_object_unref (contact_a);
    }

    if (contact_b) {
        g_object_unref (contact_b);
    }

    return ret_val;
}

static gboolean
contact_list_store_find_contact_foreach (GtkTreeModel *model,
                     GtkTreePath  *path,
                     GtkTreeIter  *iter,
                     FindContact  *fc)
{
    GossipContact *contact;

    gtk_tree_model_get (model, iter,
                COL_CONTACT, &contact,
                -1);

    if (!contact) {
        return FALSE;
    }

    if (gossip_contact_equal (contact, fc->contact)) {
        fc->found = TRUE;
        fc->iters = g_list_append (fc->iters, gtk_tree_iter_copy (iter));
    }
    g_object_unref (contact);

    return FALSE;
}

static GList *
contact_list_store_find_contact (GossipContactListStore *store,
                 GossipContact          *contact)
{
    GossipContactListStorePriv *priv;
    GtkTreeModel              *model;
    GList                     *l = NULL;
    FindContact                fc;

    priv = GET_PRIV (store);

    memset (&fc, 0, sizeof (fc));

    fc.contact = contact;

    model = GTK_TREE_MODEL (store);
    gtk_tree_model_foreach (model,
                (GtkTreeModelForeachFunc) contact_list_store_find_contact_foreach,
                &fc);

    if (fc.found) {
        l = fc.iters;
    }

    return l;
}

static gboolean
contact_list_store_update_list_mode_foreach (GtkTreeModel           *model,
                         GtkTreePath            *path,
                         GtkTreeIter            *iter,
                         GossipContactListStore *store)
{
    GossipContactListStorePriv *priv;
    gboolean                    show_avatar = FALSE;

    priv = GET_PRIV (store);

    if (priv->show_avatars && !priv->is_compact) {
        show_avatar = TRUE;
    }

    gtk_tree_store_set (GTK_TREE_STORE (store), iter,
                COL_PIXBUF_AVATAR_VISIBLE, show_avatar,
                COL_STATUS_VISIBLE, !priv->is_compact,
                -1);

    return FALSE;
}