path: root/libempathy-gtk/empathy-contact-list-view.c

/* -*- 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/gi18n.h>
#include <gtk/gtk.h>
#include <glade/glade.h>

#include <libmissioncontrol/mc-account.h>
#include <libmissioncontrol/mission-control.h>

#include <libempathy/empathy-contact-factory.h>
#include <libempathy/empathy-contact-list.h>
#include <libempathy/empathy-log-manager.h>
#include <libempathy/empathy-debug.h>
#include <libempathy/empathy-utils.h>
#include <libempathy/empathy-marshal.h>

#include "empathy-contact-list-view.h"
#include "empathy-contact-list-store.h"
#include "empathy-images.h"
#include "empathy-contact-groups.h"
#include "empathy-cell-renderer-expander.h"
#include "empathy-cell-renderer-text.h"
#include "empathy-ui-utils.h"
#include "empathy-contact-dialogs.h"
//#include "empathy-chat-invite.h"
//#include "empathy-ft-window.h"
#include "empathy-log-window.h"

#define DEBUG_DOMAIN "ContactListView"

/* Flashing delay for icons (milliseconds). */
#define FLASH_TIMEOUT 500

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

#define GET_PRIV(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), EMPATHY_TYPE_CONTACT_LIST_VIEW, EmpathyContactListViewPriv))

struct _EmpathyContactListViewPriv {
    EmpathyContactListStore *store;
    GtkUIManager            *ui;
    GtkTreeRowReference     *drag_row;
};

typedef struct {
    EmpathyContactListView *view;
    GtkTreePath           *path;
    guint                  timeout_id;
} DragMotionData;

typedef struct {
    EmpathyContactListView *view;
    EmpathyContact         *contact;
    gboolean               remove;
} ShowActiveData;

static void        empathy_contact_list_view_class_init         (EmpathyContactListViewClass *klass);
static void        empathy_contact_list_view_init               (EmpathyContactListView      *list);
static void        contact_list_view_finalize                  (GObject                    *object);
static void        contact_list_view_get_property              (GObject                    *object,
                                guint                       param_id,
                                GValue                     *value,
                                GParamSpec                 *pspec);
static void        contact_list_view_set_property              (GObject                    *object,
                                guint                       param_id,
                                const GValue               *value,
                                GParamSpec                 *pspec);
static void        contact_list_view_setup                     (EmpathyContactListView      *view);
static void        contact_list_view_row_has_child_toggled_cb  (GtkTreeModel               *model,
                                GtkTreePath                *path,
                                GtkTreeIter                *iter,
                                EmpathyContactListView      *view);
static void        contact_list_view_drag_data_received        (GtkWidget                  *widget,
                                GdkDragContext             *context,
                                gint                        x,
                                gint                        y,
                                GtkSelectionData           *selection,
                                guint                       info,
                                guint                       time);
static gboolean    contact_list_view_drag_motion               (GtkWidget                  *widget,
                                GdkDragContext             *context,
                                gint                        x,
                                gint                        y,
                                guint                       time);
static gboolean    contact_list_view_drag_motion_cb            (DragMotionData             *data);
static void        contact_list_view_drag_begin                (GtkWidget                  *widget,
                                GdkDragContext             *context);
static void        contact_list_view_drag_data_get             (GtkWidget                  *widget,
                                GdkDragContext             *context,
                                GtkSelectionData           *selection,
                                guint                       info,
                                guint                       time);
static void        contact_list_view_drag_end                  (GtkWidget                  *widget,
                                GdkDragContext             *context);
static gboolean    contact_list_view_drag_drop                 (GtkWidget                  *widget,
                                GdkDragContext             *drag_context,
                                gint                        x,
                                gint                        y,
                                guint                       time);
static void        contact_list_view_cell_set_background       (EmpathyContactListView      *view,
                                GtkCellRenderer            *cell,
                                gboolean                    is_group,
                                gboolean                    is_active);
static void        contact_list_view_pixbuf_cell_data_func     (GtkTreeViewColumn          *tree_column,
                                GtkCellRenderer            *cell,
                                GtkTreeModel               *model,
                                GtkTreeIter                *iter,
                                EmpathyContactListView      *view);
static void        contact_list_view_avatar_cell_data_func     (GtkTreeViewColumn          *tree_column,
                                GtkCellRenderer            *cell,
                                GtkTreeModel               *model,
                                GtkTreeIter                *iter,
                                EmpathyContactListView      *view);
static void        contact_list_view_text_cell_data_func       (GtkTreeViewColumn          *tree_column,
                                GtkCellRenderer            *cell,
                                GtkTreeModel               *model,
                                GtkTreeIter                *iter,
                                EmpathyContactListView      *view);
static void        contact_list_view_expander_cell_data_func   (GtkTreeViewColumn          *column,
                                GtkCellRenderer            *cell,
                                GtkTreeModel               *model,
                                GtkTreeIter                *iter,
                                EmpathyContactListView      *view);
static GtkWidget * contact_list_view_get_contact_menu          (EmpathyContactListView      *view,
                                gboolean                    can_send_file,
                                gboolean                    can_show_log);
static gboolean    contact_list_view_button_press_event_cb     (EmpathyContactListView      *view,
                                GdkEventButton             *event,
                                gpointer                    user_data);
static void        contact_list_view_row_activated_cb          (EmpathyContactListView      *view,
                                GtkTreePath                *path,
                                GtkTreeViewColumn          *col,
                                gpointer                    user_data);
static void        contact_list_view_row_expand_or_collapse_cb (EmpathyContactListView      *view,
                                GtkTreeIter                *iter,
                                GtkTreePath                *path,
                                gpointer                    user_data);
static void        contact_list_view_action_cb                 (GtkAction                  *action,
                                EmpathyContactListView      *view);
static void        contact_list_view_action_activated          (EmpathyContactListView      *view,
                                EmpathyContact              *contact);

enum {
    PROP_0,
};

static const GtkActionEntry entries[] = {
    { "ContactMenu", NULL,
      N_("_Contact"), NULL, NULL,
      NULL
    },
    { "GroupMenu", NULL,
      N_("_Group"),NULL, NULL,
      NULL
    },
    { "Chat", EMPATHY_IMAGE_MESSAGE,
      N_("_Chat"), NULL, N_("Chat with contact"),
      G_CALLBACK (contact_list_view_action_cb)
    },
    { "Information", EMPATHY_IMAGE_CONTACT_INFORMATION,
      N_("Infor_mation"), "<control>I", N_("View contact information"),
      G_CALLBACK (contact_list_view_action_cb)
    },
    { "Rename", NULL,
      N_("Re_name"), NULL, N_("Rename"),
      G_CALLBACK (contact_list_view_action_cb)
    },
    { "Edit", GTK_STOCK_EDIT,
      N_("_Edit"), NULL, N_("Edit the groups and name for this contact"),
      G_CALLBACK (contact_list_view_action_cb)
    },
    { "Remove", GTK_STOCK_REMOVE,
      N_("_Remove"), NULL, N_("Remove contact"),
      G_CALLBACK (contact_list_view_action_cb)
    },
    { "Invite", EMPATHY_IMAGE_GROUP_MESSAGE,
      N_("_Invite to Chat Room"), NULL, N_("Invite to a currently open chat room"),
      G_CALLBACK (contact_list_view_action_cb)
    },
    { "SendFile", NULL,
      N_("_Send File..."), NULL, N_("Send a file"),
      G_CALLBACK (contact_list_view_action_cb)
    },
    { "Log", GTK_STOCK_JUSTIFY_LEFT,
      N_("_View Previous Conversations"), NULL, N_("View previous conversations with this contact"),
      G_CALLBACK (contact_list_view_action_cb)
    },
};

static guint n_entries = G_N_ELEMENTS (entries);

static const gchar *ui_info =
    "<ui>"
    "  <popup name='Contact'>"
    "    <menuitem action='Chat'/>"
    "    <menuitem action='Log'/>"
    "    <menuitem action='SendFile'/>"
    "    <separator/>"
    "    <menuitem action='Invite'/>"
    "    <separator/>"
    "    <menuitem action='Edit'/>"
    "    <menuitem action='Remove'/>"
    "    <separator/>"
    "    <menuitem action='Information'/>"
    "  </popup>"
    "  <popup name='Group'>"
    "    <menuitem action='Rename'/>"
    "  </popup>"
    "</ui>";

enum DndDragType {
    DND_DRAG_TYPE_CONTACT_ID,
    DND_DRAG_TYPE_URL,
    DND_DRAG_TYPE_STRING,
};

static const GtkTargetEntry drag_types_dest[] = {
    { "text/contact-id", 0, DND_DRAG_TYPE_CONTACT_ID },
    { "text/uri-list",   0, DND_DRAG_TYPE_URL },
    { "text/plain",      0, DND_DRAG_TYPE_STRING },
    { "STRING",          0, DND_DRAG_TYPE_STRING },
};

static const GtkTargetEntry drag_types_source[] = {
    { "text/contact-id", 0, DND_DRAG_TYPE_CONTACT_ID },
};

static GdkAtom drag_atoms_dest[G_N_ELEMENTS (drag_types_dest)];
static GdkAtom drag_atoms_source[G_N_ELEMENTS (drag_types_source)];

enum {
    DRAG_CONTACT_RECEIVED,
    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL];

G_DEFINE_TYPE (EmpathyContactListView, empathy_contact_list_view, GTK_TYPE_TREE_VIEW);

static void
empathy_contact_list_view_class_init (EmpathyContactListViewClass *klass)
{
    GObjectClass   *object_class = G_OBJECT_CLASS (klass);
    GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);

    object_class->finalize = contact_list_view_finalize;
    object_class->get_property = contact_list_view_get_property;
    object_class->set_property = contact_list_view_set_property;

    widget_class->drag_data_received = contact_list_view_drag_data_received;
    widget_class->drag_drop          = contact_list_view_drag_drop;
    widget_class->drag_begin         = contact_list_view_drag_begin;
    widget_class->drag_data_get      = contact_list_view_drag_data_get;
    widget_class->drag_end           = contact_list_view_drag_end;
    /* FIXME: noticed but when you drag the row over the treeview
     * fast, it seems to stop redrawing itself, if we don't
     * connect this signal, all is fine.
     */
    widget_class->drag_motion        = contact_list_view_drag_motion;

    signals[DRAG_CONTACT_RECEIVED] =
        g_signal_new ("drag-contact-received",
                  G_OBJECT_CLASS_TYPE (klass),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL,
                  empathy_marshal_VOID__OBJECT_STRING_STRING,
                  G_TYPE_NONE,
                  3, EMPATHY_TYPE_CONTACT, G_TYPE_STRING, G_TYPE_STRING);

    g_type_class_add_private (object_class, sizeof (EmpathyContactListViewPriv));
}

static void
empathy_contact_list_view_init (EmpathyContactListView *view)
{
    EmpathyContactListViewPriv *priv;
    GtkActionGroup            *action_group;
    GError                    *error = NULL;

    priv = GET_PRIV (view);

    /* Get saved group states. */
    empathy_contact_groups_get_all ();

    /* Set up UI Manager */
    priv->ui = gtk_ui_manager_new ();

    action_group = gtk_action_group_new ("Actions");
    gtk_action_group_set_translation_domain (action_group, GETTEXT_PACKAGE);
    gtk_action_group_add_actions (action_group, entries, n_entries, view);
    gtk_ui_manager_insert_action_group (priv->ui, action_group, 0);

    if (!gtk_ui_manager_add_ui_from_string (priv->ui, ui_info, -1, &error)) {
        g_warning ("Could not build contact menus from string:'%s'", error->message);
        g_error_free (error);
    }

    g_object_unref (action_group);

    gtk_tree_view_set_row_separator_func (GTK_TREE_VIEW (view), 
                          empathy_contact_list_store_row_separator_func,
                          NULL, NULL);

    /* Connect to tree view signals rather than override. */
    g_signal_connect (view,
              "button-press-event",
              G_CALLBACK (contact_list_view_button_press_event_cb),
              NULL);
    g_signal_connect (view,
              "row-activated",
              G_CALLBACK (contact_list_view_row_activated_cb),
              NULL);
    g_signal_connect (view,
              "row-expanded",
              G_CALLBACK (contact_list_view_row_expand_or_collapse_cb),
              GINT_TO_POINTER (TRUE));
    g_signal_connect (view,
              "row-collapsed",
              G_CALLBACK (contact_list_view_row_expand_or_collapse_cb),
              GINT_TO_POINTER (FALSE));
}

static void
contact_list_view_finalize (GObject *object)
{
    EmpathyContactListViewPriv *priv;

    priv = GET_PRIV (object);

    if (priv->ui) {
        g_object_unref (priv->ui);
    }
    if (priv->store) {
        g_object_unref (priv->store);
    }

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

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

    priv = GET_PRIV (object);

    switch (param_id) {
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    };
}

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

    priv = GET_PRIV (object);

    switch (param_id) {
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    };
}

EmpathyContactListView *
empathy_contact_list_view_new (EmpathyContactListStore *store)
{
    EmpathyContactListViewPriv *priv;
    EmpathyContactListView     *view;
    
    view = g_object_new (EMPATHY_TYPE_CONTACT_LIST_VIEW, NULL);
    priv = GET_PRIV (view);

    priv->store = g_object_ref (store);
    contact_list_view_setup (view);

    return view;
}

EmpathyContact *
empathy_contact_list_view_get_selected (EmpathyContactListView *view)
{
    EmpathyContactListViewPriv *priv;
    GtkTreeSelection          *selection;
    GtkTreeIter                iter;
    GtkTreeModel              *model;
    EmpathyContact             *contact;

    g_return_val_if_fail (EMPATHY_IS_CONTACT_LIST_VIEW (view), NULL);

    priv = GET_PRIV (view);

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (view));
    if (!gtk_tree_selection_get_selected (selection, &model, &iter)) {
        return NULL;
    }

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

    return contact;
}

gchar *
empathy_contact_list_view_get_selected_group (EmpathyContactListView *view)
{
    EmpathyContactListViewPriv *priv;
    GtkTreeSelection          *selection;
    GtkTreeIter                iter;
    GtkTreeModel              *model;
    gboolean                   is_group;
    gchar                     *name;

    g_return_val_if_fail (EMPATHY_IS_CONTACT_LIST_VIEW (view), NULL);

    priv = GET_PRIV (view);

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (view));
    if (!gtk_tree_selection_get_selected (selection, &model, &iter)) {
        return NULL;
    }

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

    if (!is_group) {
        g_free (name);
        return NULL;
    }

    return name;
}

GtkWidget *
empathy_contact_list_view_get_group_menu (EmpathyContactListView *view)
{
    EmpathyContactListViewPriv *priv;
    GtkWidget                 *widget;

    g_return_val_if_fail (EMPATHY_IS_CONTACT_LIST_VIEW (view), NULL);

    priv = GET_PRIV (view);

    widget = gtk_ui_manager_get_widget (priv->ui, "/Group");

    return widget;
}

GtkWidget *
empathy_contact_list_view_get_contact_menu (EmpathyContactListView *view,
                       EmpathyContact         *contact)
{
    EmpathyLogManager *log_manager;
    gboolean           can_show_log;
    gboolean           can_send_file;

    g_return_val_if_fail (EMPATHY_IS_CONTACT_LIST_VIEW (view), NULL);
    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);

    log_manager = empathy_log_manager_new ();
    can_show_log = empathy_log_manager_exists (log_manager,
                           empathy_contact_get_account (contact),
                           empathy_contact_get_id (contact),
                           FALSE);
    can_send_file = FALSE;
    g_object_unref (log_manager);

    return contact_list_view_get_contact_menu (view,
                           can_send_file,
                           can_show_log);
}

static void
contact_list_view_setup (EmpathyContactListView *view)
{
    EmpathyContactListViewPriv *priv;
    GtkCellRenderer           *cell;
    GtkTreeViewColumn         *col;
    gint                       i;

    priv = GET_PRIV (view);

    g_signal_connect (priv->store, "row-has-child-toggled",
              G_CALLBACK (contact_list_view_row_has_child_toggled_cb),
              view);
    gtk_tree_view_set_model (GTK_TREE_VIEW (view),
                 GTK_TREE_MODEL (priv->store));

    /* Setup view */
    g_object_set (view,
              "headers-visible", FALSE,
              "reorderable", TRUE,
              "show-expanders", FALSE,
              NULL);

    col = gtk_tree_view_column_new ();

    /* State */
    cell = gtk_cell_renderer_pixbuf_new ();
    gtk_tree_view_column_pack_start (col, cell, FALSE);
    gtk_tree_view_column_set_cell_data_func (
        col, cell,
        (GtkTreeCellDataFunc) contact_list_view_pixbuf_cell_data_func,
        view, NULL);

    g_object_set (cell,
              "xpad", 5,
              "ypad", 1,
              "visible", FALSE,
              NULL);

    /* Name */
    cell = empathy_cell_renderer_text_new ();
    gtk_tree_view_column_pack_start (col, cell, TRUE);
    gtk_tree_view_column_set_cell_data_func (
        col, cell,
        (GtkTreeCellDataFunc) contact_list_view_text_cell_data_func,
        view, NULL);

    gtk_tree_view_column_add_attribute (col, cell,
                        "name", COL_NAME);
    gtk_tree_view_column_add_attribute (col, cell,
                        "status", COL_STATUS);
    gtk_tree_view_column_add_attribute (col, cell,
                        "is_group", COL_IS_GROUP);

    /* Avatar */
    cell = gtk_cell_renderer_pixbuf_new ();
    gtk_tree_view_column_pack_start (col, cell, FALSE);
    gtk_tree_view_column_set_cell_data_func (
        col, cell,
        (GtkTreeCellDataFunc) contact_list_view_avatar_cell_data_func,
        view, NULL);

    g_object_set (cell,
              "xpad", 0,
              "ypad", 0,
              "visible", FALSE,
              "width", 32,
              "height", 32,
              NULL);

    /* Expander */
    cell = empathy_cell_renderer_expander_new ();
    gtk_tree_view_column_pack_end (col, cell, FALSE);
    gtk_tree_view_column_set_cell_data_func (
        col, cell,
        (GtkTreeCellDataFunc) contact_list_view_expander_cell_data_func,
        view, NULL);

    /* Actually add the column now we have added all cell renderers */
    gtk_tree_view_append_column (GTK_TREE_VIEW (view), col);

    /* Drag & Drop. */
    for (i = 0; i < G_N_ELEMENTS (drag_types_dest); ++i) {
        drag_atoms_dest[i] = gdk_atom_intern (drag_types_dest[i].target,
                              FALSE);
    }

    for (i = 0; i < G_N_ELEMENTS (drag_types_source); ++i) {
        drag_atoms_source[i] = gdk_atom_intern (drag_types_source[i].target,
                            FALSE);
    }

    /* Note: We support the COPY action too, but need to make the
     * MOVE action the default.
     */
    gtk_drag_source_set (GTK_WIDGET (view),
                 GDK_BUTTON1_MASK,
                 drag_types_source,
                 G_N_ELEMENTS (drag_types_source),
                 GDK_ACTION_MOVE | GDK_ACTION_COPY);

    gtk_drag_dest_set (GTK_WIDGET (view),
               GTK_DEST_DEFAULT_ALL,
               drag_types_dest,
               G_N_ELEMENTS (drag_types_dest),
               GDK_ACTION_MOVE | GDK_ACTION_COPY);
}

static void
contact_list_view_row_has_child_toggled_cb (GtkTreeModel          *model,
                        GtkTreePath           *path,
                        GtkTreeIter           *iter,
                        EmpathyContactListView *view)
{
    gboolean  is_group = FALSE;
    gchar    *name = NULL;

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

    if (!is_group || G_STR_EMPTY (name)) {
        g_free (name);
        return;
    }

    if (empathy_contact_group_get_expanded (name)) {
        g_signal_handlers_block_by_func (view,
                         contact_list_view_row_expand_or_collapse_cb,
                         GINT_TO_POINTER (TRUE));
        gtk_tree_view_expand_row (GTK_TREE_VIEW (view), path, TRUE);
        g_signal_handlers_unblock_by_func (view,
                           contact_list_view_row_expand_or_collapse_cb,
                           GINT_TO_POINTER (TRUE));
    } else {
        g_signal_handlers_block_by_func (view,
                         contact_list_view_row_expand_or_collapse_cb,
                         GINT_TO_POINTER (FALSE));
        gtk_tree_view_collapse_row (GTK_TREE_VIEW (view), path);
        g_signal_handlers_unblock_by_func (view,
                           contact_list_view_row_expand_or_collapse_cb,
                           GINT_TO_POINTER (FALSE));
    }

    g_free (name);
}

static void
contact_list_view_drag_data_received (GtkWidget         *widget,
                      GdkDragContext    *context,
                      gint               x,
                      gint               y,
                      GtkSelectionData  *selection,
                      guint              info,
                      guint              time)
{
    EmpathyContactListViewPriv *priv;
    EmpathyContactList         *list;
    EmpathyContactFactory      *factory;
    McAccount                  *account;
    GtkTreeModel               *model;
    GtkTreePath                *path;
    GtkTreeViewDropPosition     position;
    EmpathyContact             *contact = NULL;
    const gchar                *id;
    gchar                     **strv;
    gchar                      *new_group = NULL;
    gchar                      *old_group = NULL;
    gboolean                    is_row;

    priv = GET_PRIV (widget);

    id = (const gchar*) selection->data;
    empathy_debug (DEBUG_DOMAIN, "Received %s%s drag & drop contact from roster with id:'%s'",
              context->action == GDK_ACTION_MOVE ? "move" : "",
              context->action == GDK_ACTION_COPY ? "copy" : "",
              id);

    strv = g_strsplit (id, "/", 2);
    factory = empathy_contact_factory_new ();
    account = mc_account_lookup (strv[0]);
    if (account) {
        contact = empathy_contact_factory_get_from_id (factory,
                                   account,
                                   strv[1]);
        g_object_unref (account);
    }
    g_object_unref (factory);
    g_object_unref (account);
    g_strfreev (strv);

    if (!contact) {
        empathy_debug (DEBUG_DOMAIN, "No contact found associated with drag & drop");
        return;
    }

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (widget));

    /* Get source group information. */
    if (priv->drag_row) {
        path = gtk_tree_row_reference_get_path (priv->drag_row);
        if (path) {
            old_group = empathy_contact_list_store_get_parent_group (model, path, NULL);
            gtk_tree_path_free (path);
        }
    }

    /* Get destination group information. */
    is_row = gtk_tree_view_get_dest_row_at_pos (GTK_TREE_VIEW (widget),
                            x,
                            y,
                            &path,
                            &position);

    if (is_row) {
        new_group = empathy_contact_list_store_get_parent_group (model, path, NULL);
        gtk_tree_path_free (path);
    }

    empathy_debug (DEBUG_DOMAIN,
              "contact %s (%d) dragged from '%s' to '%s'",
              empathy_contact_get_id (contact),
              empathy_contact_get_handle (contact),
              old_group, new_group);

    list = empathy_contact_list_store_get_list_iface (priv->store);
    if (new_group) {
        empathy_contact_list_add_to_group (list, contact, new_group);
    }
    if (old_group && context->action == GDK_ACTION_MOVE) {  
        empathy_contact_list_remove_from_group (list, contact, old_group);
    }

    g_free (old_group);
    g_free (new_group);

    gtk_drag_finish (context, TRUE, FALSE, GDK_CURRENT_TIME);
}

static gboolean
contact_list_view_drag_motion (GtkWidget      *widget,
                   GdkDragContext *context,
                   gint            x,
                   gint            y,
                   guint           time)
{
    static DragMotionData *dm = NULL;
    GtkTreePath           *path;
    gboolean               is_row;
    gboolean               is_different = FALSE;
    gboolean               cleanup = TRUE;

    is_row = gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (widget),
                        x,
                        y,
                        &path,
                        NULL,
                        NULL,
                        NULL);

    cleanup &= (!dm);

    if (is_row) {
        cleanup &= (dm && gtk_tree_path_compare (dm->path, path) != 0);
        is_different = (!dm || (dm && gtk_tree_path_compare (dm->path, path) != 0));
    } else {
        cleanup &= FALSE;
    }

    if (!is_different && !cleanup) {
        return TRUE;
    }

    if (dm) {
        gtk_tree_path_free (dm->path);
        if (dm->timeout_id) {
            g_source_remove (dm->timeout_id);
        }

        g_free (dm);

        dm = NULL;
    }

    if (!gtk_tree_view_row_expanded (GTK_TREE_VIEW (widget), path)) {
        dm = g_new0 (DragMotionData, 1);

        dm->view = EMPATHY_CONTACT_LIST_VIEW (widget);
        dm->path = gtk_tree_path_copy (path);

        dm->timeout_id = g_timeout_add (
            1500,
            (GSourceFunc) contact_list_view_drag_motion_cb,
            dm);
    }

    return TRUE;
}

static gboolean
contact_list_view_drag_motion_cb (DragMotionData *data)
{
    gtk_tree_view_expand_row (GTK_TREE_VIEW (data->view),
                  data->path,
                  FALSE);

    data->timeout_id = 0;

    return FALSE;
}

static void
contact_list_view_drag_begin (GtkWidget      *widget,
                  GdkDragContext *context)
{
    EmpathyContactListViewPriv *priv;
    GtkTreeSelection          *selection;
    GtkTreeModel              *model;
    GtkTreePath               *path;
    GtkTreeIter                iter;

    priv = GET_PRIV (widget);

    GTK_WIDGET_CLASS (empathy_contact_list_view_parent_class)->drag_begin (widget,
                                          context);

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (widget));
    if (!gtk_tree_selection_get_selected (selection, &model, &iter)) {
        return;
    }

    path = gtk_tree_model_get_path (model, &iter);
    priv->drag_row = gtk_tree_row_reference_new (model, path);
    gtk_tree_path_free (path);
}

static void
contact_list_view_drag_data_get (GtkWidget        *widget,
                 GdkDragContext   *context,
                 GtkSelectionData *selection,
                 guint             info,
                 guint             time)
{
    EmpathyContactListViewPriv *priv;
    GtkTreePath                *src_path;
    GtkTreeIter                 iter;
    GtkTreeModel               *model;
    EmpathyContact             *contact;
    McAccount                  *account;
    const gchar                *contact_id;
    const gchar                *account_id;
    gchar                      *str;
    

    priv = GET_PRIV (widget);

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (widget));
    if (!priv->drag_row) {
        return;
    }

    src_path = gtk_tree_row_reference_get_path (priv->drag_row);
    if (!src_path) {
        return;
    }

    if (!gtk_tree_model_get_iter (model, &iter, src_path)) {
        gtk_tree_path_free (src_path);
        return;
    }

    gtk_tree_path_free (src_path);

    contact = empathy_contact_list_view_get_selected (EMPATHY_CONTACT_LIST_VIEW (widget));
    if (!contact) {
        return;
    }

    account = empathy_contact_get_account (contact);
    account_id = mc_account_get_unique_name (account);
    contact_id = empathy_contact_get_id (contact);
    g_object_unref (contact);
    str = g_strconcat (account_id, "/", contact_id, NULL);

    switch (info) {
    case DND_DRAG_TYPE_CONTACT_ID:
        gtk_selection_data_set (selection, drag_atoms_source[info], 8,
                    (guchar*)str, strlen (str) + 1);
        break;
    }

    g_free (str);
}

static void
contact_list_view_drag_end (GtkWidget      *widget,
                GdkDragContext *context)
{
    EmpathyContactListViewPriv *priv;

    priv = GET_PRIV (widget);

    GTK_WIDGET_CLASS (empathy_contact_list_view_parent_class)->drag_end (widget,
                                        context);

    if (priv->drag_row) {
        gtk_tree_row_reference_free (priv->drag_row);
        priv->drag_row = NULL;
    }
}

static gboolean
contact_list_view_drag_drop (GtkWidget      *widget,
                 GdkDragContext *drag_context,
                 gint            x,
                 gint            y,
                 guint           time)
{
    return FALSE;
}

static void
contact_list_view_cell_set_background (EmpathyContactListView *view,
                       GtkCellRenderer       *cell,
                       gboolean               is_group,
                       gboolean               is_active)
{
    GdkColor  color;
    GtkStyle *style;

    style = gtk_widget_get_style (GTK_WIDGET (view));

    if (!is_group) {
        if (is_active) {
            color = style->bg[GTK_STATE_SELECTED];

            /* Here we take the current theme colour and add it to
             * the colour for white and average the two. This
             * gives a colour which is inline with the theme but
             * slightly whiter.
             */
            color.red = (color.red + (style->white).red) / 2;
            color.green = (color.green + (style->white).green) / 2;
            color.blue = (color.blue + (style->white).blue) / 2;

            g_object_set (cell,
                      "cell-background-gdk", &color,
                      NULL);
        } else {
            g_object_set (cell,
                      "cell-background-gdk", NULL,
                      NULL);
        }
    } else {
        g_object_set (cell,
                  "cell-background-gdk", NULL,
                  NULL);
    }
}

static void
contact_list_view_pixbuf_cell_data_func (GtkTreeViewColumn     *tree_column,
                     GtkCellRenderer       *cell,
                     GtkTreeModel          *model,
                     GtkTreeIter           *iter,
                     EmpathyContactListView *view)
{
    gchar    *icon_name;
    gboolean  is_group;
    gboolean  is_active;

    gtk_tree_model_get (model, iter,
                COL_IS_GROUP, &is_group,
                COL_IS_ACTIVE, &is_active,
                COL_ICON_STATUS, &icon_name,
                -1);

    g_object_set (cell,
              "visible", !is_group,
              "icon-name", icon_name,
              NULL);

    g_free (icon_name);

    contact_list_view_cell_set_background (view, cell, is_group, is_active);
}

static void
contact_list_view_avatar_cell_data_func (GtkTreeViewColumn     *tree_column,
                     GtkCellRenderer       *cell,
                     GtkTreeModel          *model,
                     GtkTreeIter           *iter,
                     EmpathyContactListView *view)
{
    GdkPixbuf *pixbuf;
    gboolean   show_avatar;
    gboolean   is_group;
    gboolean   is_active;

    gtk_tree_model_get (model, iter,
                COL_PIXBUF_AVATAR, &pixbuf,
                COL_PIXBUF_AVATAR_VISIBLE, &show_avatar,
                COL_IS_GROUP, &is_group,
                COL_IS_ACTIVE, &is_active,
                -1);

    g_object_set (cell,
              "visible", !is_group && show_avatar,
              "pixbuf", pixbuf,
              NULL);

    if (pixbuf) {
        g_object_unref (pixbuf);
    }

    contact_list_view_cell_set_background (view, cell, is_group, is_active);
}

static void
contact_list_view_text_cell_data_func (GtkTreeViewColumn     *tree_column,
                       GtkCellRenderer       *cell,
                       GtkTreeModel          *model,
                       GtkTreeIter           *iter,
                       EmpathyContactListView *view)
{
    gboolean is_group;
    gboolean is_active;
    gboolean show_status;

    gtk_tree_model_get (model, iter,
                COL_IS_GROUP, &is_group,
                COL_IS_ACTIVE, &is_active,
                COL_STATUS_VISIBLE, &show_status,
                -1);

    g_object_set (cell,
              "show-status", show_status,
              NULL);

    contact_list_view_cell_set_background (view, cell, is_group, is_active);
}

static void
contact_list_view_expander_cell_data_func (GtkTreeViewColumn     *column,
                       GtkCellRenderer       *cell,
                       GtkTreeModel          *model,
                       GtkTreeIter           *iter,
                       EmpathyContactListView *view)
{
    gboolean is_group;
    gboolean is_active;

    gtk_tree_model_get (model, iter,
                COL_IS_GROUP, &is_group,
                COL_IS_ACTIVE, &is_active,
                -1);

    if (gtk_tree_model_iter_has_child (model, iter)) {
        GtkTreePath *path;
        gboolean     row_expanded;

        path = gtk_tree_model_get_path (model, iter);
        row_expanded = gtk_tree_view_row_expanded (GTK_TREE_VIEW (column->tree_view), path);
        gtk_tree_path_free (path);

        g_object_set (cell,
                  "visible", TRUE,
                  "expander-style", row_expanded ? GTK_EXPANDER_EXPANDED : GTK_EXPANDER_COLLAPSED,
                  NULL);
    } else {
        g_object_set (cell, "visible", FALSE, NULL);
    }

    contact_list_view_cell_set_background (view, cell, is_group, is_active);
}

static GtkWidget *
contact_list_view_get_contact_menu (EmpathyContactListView *view,
                    gboolean               can_send_file,
                    gboolean               can_show_log)
{
    EmpathyContactListViewPriv *priv;
    GtkAction                 *action;
    GtkWidget                 *widget;

    priv = GET_PRIV (view);

    /* Sort out sensitive items */
    action = gtk_ui_manager_get_action (priv->ui, "/Contact/Log");
    gtk_action_set_sensitive (action, can_show_log);

    action = gtk_ui_manager_get_action (priv->ui, "/Contact/SendFile");
    gtk_action_set_visible (action, can_send_file);

    widget = gtk_ui_manager_get_widget (priv->ui, "/Contact");

    return widget;
}

static gboolean
contact_list_view_button_press_event_cb (EmpathyContactListView *view,
                     GdkEventButton        *event,
                     gpointer               user_data)
{
    EmpathyContactListViewPriv *priv;
    EmpathyContact             *contact;
    GtkTreePath               *path;
    GtkTreeSelection          *selection;
    GtkTreeModel              *model;
    GtkTreeIter                iter;
    gboolean                   row_exists;
    GtkWidget                 *menu;

    if (event->button != 3) {
        return FALSE;
    }

    priv = GET_PRIV (view);

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (view));
    model = gtk_tree_view_get_model (GTK_TREE_VIEW (view));

    gtk_widget_grab_focus (GTK_WIDGET (view));

    row_exists = gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (view),
                            event->x, event->y,
                            &path,
                            NULL, NULL, NULL);
    if (!row_exists) {
        return FALSE;
    }

    gtk_tree_selection_unselect_all (selection);
    gtk_tree_selection_select_path (selection, path);

    gtk_tree_model_get_iter (model, &iter, path);
    gtk_tree_path_free (path);

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

    if (contact) {
        menu = empathy_contact_list_view_get_contact_menu (view, contact);
        g_object_unref (contact);
    } else {
        menu = empathy_contact_list_view_get_group_menu (view);
    }

    if (!menu) {
        return FALSE;
    }

    gtk_widget_show (menu);

    gtk_menu_popup (GTK_MENU (menu),
            NULL, NULL, NULL, NULL,
            event->button, event->time);

    return TRUE;
}

static void
contact_list_view_row_activated_cb (EmpathyContactListView *view,
                    GtkTreePath           *path,
                    GtkTreeViewColumn     *col,
                    gpointer               user_data)
{
    EmpathyContact *contact;
    GtkTreeModel  *model;
    GtkTreeIter    iter;

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (view));

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

    if (contact) {
        contact_list_view_action_activated (view, contact);
        g_object_unref (contact);
    }
}

static void
contact_list_view_row_expand_or_collapse_cb (EmpathyContactListView *view,
                         GtkTreeIter           *iter,
                         GtkTreePath           *path,
                         gpointer               user_data)
{
    GtkTreeModel *model;
    gchar        *name;
    gboolean      expanded;

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (view));

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

    expanded = GPOINTER_TO_INT (user_data);
    empathy_contact_group_set_expanded (name, expanded);

    g_free (name);
}

static void
contact_list_view_action_cb (GtkAction             *action,
                 EmpathyContactListView *view)
{
    EmpathyContactListViewPriv *priv;
    EmpathyContact             *contact;
    const gchar               *name;
    gchar                     *group;
    GtkWindow                 *parent;

    priv = GET_PRIV (view);

    name = gtk_action_get_name (action);
    if (!name) {
        return;
    }

    empathy_debug (DEBUG_DOMAIN, "Action:'%s' activated", name);

    contact = empathy_contact_list_view_get_selected (view);
    group = empathy_contact_list_view_get_selected_group (view);
    parent = empathy_get_toplevel_window (GTK_WIDGET (view));

    if (contact && strcmp (name, "Chat") == 0) {
        contact_list_view_action_activated (view, contact);
    }
    else if (contact && strcmp (name, "Information") == 0) {
        empathy_contact_information_dialog_show (contact, parent, FALSE);
    }
    else if (contact && strcmp (name, "Edit") == 0) {
        empathy_contact_information_dialog_show (contact, parent, TRUE);
    }
    else if (contact && strcmp (name, "Remove") == 0) {
        /* FIXME: Ask for confirmation */
        EmpathyContactList *list;

        list = empathy_contact_list_store_get_list_iface (priv->store);
        empathy_contact_list_remove (list, contact,
                         _("Sorry, I don't want you in my contact list anymore."));
    }
    else if (contact && strcmp (name, "Invite") == 0) {
    }
    else if (contact && strcmp (name, "SendFile") == 0) {
    }
    else if (contact && strcmp (name, "Log") == 0) {
        empathy_log_window_show (empathy_contact_get_account (contact),
                    empathy_contact_get_id (contact),
                    FALSE,
                    parent);
    }
    else if (group && strcmp (name, "Rename") == 0) {
    }

    g_free (group);
    if (contact) {
        g_object_unref (contact);
    }
}

static void
contact_list_view_action_activated (EmpathyContactListView *view,
                    EmpathyContact         *contact)
{
    MissionControl *mc;

    mc = empathy_mission_control_new ();
    mission_control_request_channel (mc,
                     empathy_contact_get_account (contact),
                     TP_IFACE_CHANNEL_TYPE_TEXT,
                     empathy_contact_get_handle (contact),
                     TP_HANDLE_TYPE_CONTACT,
                     NULL, NULL);
    g_object_unref (mc);
}