path: root/libempathy-gtk/empathy-chat.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2002-2007 Imendio AB
 * Copyright (C) 2007-2008 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., 51 Franklin St, Fifth Floor,
 * Boston, MA  02110-1301  USA
 *
 * Authors: Mikael Hallendal <micke@imendio.com>
 *          Richard Hult <richard@imendio.com>
 *          Martyn Russell <martyn@imendio.com>
 *          Geert-Jan Van den Bogaerde <geertjan@gnome.org>
 *          Xavier Claessens <xclaesse@gmail.com>
 */

#include <config.h>

#include <string.h>
#include <stdlib.h>

#include <gdk/gdkkeysyms.h>
#include <glib/gi18n-lib.h>
#include <gtk/gtk.h>

#include <telepathy-glib/util.h>

#include <libempathy/empathy-account-manager.h>
#include <libempathy/empathy-log-manager.h>
#include <libempathy/empathy-contact-list.h>
#include <libempathy/empathy-utils.h>
#include <libempathy/empathy-dispatcher.h>

#include "empathy-chat.h"
#include "empathy-conf.h"
#include "empathy-spell.h"
#include "empathy-contact-list-store.h"
#include "empathy-contact-list-view.h"
#include "empathy-contact-menu.h"
#include "empathy-theme-manager.h"
#include "empathy-smiley-manager.h"
#include "empathy-ui-utils.h"

#define DEBUG_FLAG EMPATHY_DEBUG_CHAT
#include <libempathy/empathy-debug.h>

#define CHAT_DIR_CREATE_MODE  (S_IRUSR | S_IWUSR | S_IXUSR)
#define CHAT_FILE_CREATE_MODE (S_IRUSR | S_IWUSR)
#define IS_ENTER(v) (v == GDK_Return || v == GDK_ISO_Enter || v == GDK_KP_Enter)
#define MAX_INPUT_HEIGHT 150
#define COMPOSING_STOP_TIMEOUT 5

#define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyChat)
typedef struct {
    EmpathyTpChat     *tp_chat;
    EmpathyAccount    *account;
    gchar             *id;
    gchar             *name;
    gchar             *subject;
    EmpathyContact    *remote_contact;
    gboolean           show_contacts;

    EmpathyLogManager *log_manager;
    EmpathyAccountManager *account_manager;
    GSList            *sent_messages;
    gint               sent_messages_index;
    GList             *compositors;
    GCompletion       *completion;
    guint              composing_stop_timeout_id;
    guint              block_events_timeout_id;
    TpHandleType       handle_type;
    gint               contacts_width;
    gboolean           has_input_vscroll;

    GtkWidget         *widget;
    GtkWidget         *hpaned;
    GtkWidget         *vbox_left;
    GtkWidget         *scrolled_window_chat;
    GtkWidget         *scrolled_window_input;
    GtkWidget         *scrolled_window_contacts;
    GtkWidget         *hbox_topic;
    GtkWidget         *label_topic;
    GtkWidget         *contact_list_view;
} EmpathyChatPriv;

enum {
    COMPOSING,
    NEW_MESSAGE,
    LAST_SIGNAL
};

enum {
    PROP_0,
    PROP_TP_CHAT,
    PROP_ACCOUNT,
    PROP_ID,
    PROP_NAME,
    PROP_SUBJECT,
    PROP_REMOTE_CONTACT,
    PROP_SHOW_CONTACTS,
};

static guint signals[LAST_SIGNAL] = { 0 };

G_DEFINE_TYPE (EmpathyChat, empathy_chat, GTK_TYPE_BIN);

static void
chat_get_property (GObject    *object,
           guint       param_id,
           GValue     *value,
           GParamSpec *pspec)
{
    EmpathyChat *chat = EMPATHY_CHAT (object);
    EmpathyChatPriv *priv = GET_PRIV (object);

    switch (param_id) {
    case PROP_TP_CHAT:
        g_value_set_object (value, priv->tp_chat);
        break;
    case PROP_ACCOUNT:
        g_value_set_object (value, priv->account);
        break;
    case PROP_NAME:
        g_value_set_string (value, empathy_chat_get_name (chat));
        break;
    case PROP_ID:
        g_value_set_string (value, priv->id);
        break;
    case PROP_SUBJECT:
        g_value_set_string (value, priv->subject);
        break;
    case PROP_REMOTE_CONTACT:
        g_value_set_object (value, priv->remote_contact);
        break;
    case PROP_SHOW_CONTACTS:
        g_value_set_boolean (value, priv->show_contacts);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    };
}

static void
chat_set_property (GObject      *object,
           guint         param_id,
           const GValue *value,
           GParamSpec   *pspec)
{
    EmpathyChat *chat = EMPATHY_CHAT (object);

    switch (param_id) {
    case PROP_TP_CHAT:
        empathy_chat_set_tp_chat (chat, EMPATHY_TP_CHAT (g_value_get_object (value)));
        break;
    case PROP_SHOW_CONTACTS:
        empathy_chat_set_show_contacts (chat, g_value_get_boolean (value));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    };
}

static void
chat_connect_channel_reconnected (EmpathyDispatchOperation *dispatch,
                  const GError             *error,
                  gpointer                  user_data)
{
    EmpathyChat *chat = EMPATHY_CHAT (user_data);
    EmpathyTpChat *tpchat;

    if (error != NULL) {
        empathy_chat_view_append_event (chat->view,
            _("Failed to reconnect this chat"));
        return;
    }

    tpchat = EMPATHY_TP_CHAT (
        empathy_dispatch_operation_get_channel_wrapper (dispatch));

    if (empathy_dispatch_operation_claim (dispatch)) {
        empathy_chat_set_tp_chat (chat, tpchat);
    }
}

static void
chat_new_connection_cb (EmpathyAccountManager *manager,
            TpConnection *connection,
            EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    EmpathyAccount *account;

    account = empathy_account_manager_get_account_for_connection (manager,
        connection);
    if (!priv->tp_chat && account == priv->account &&
        priv->handle_type != TP_HANDLE_TYPE_NONE &&
        !EMP_STR_EMPTY (priv->id)) {

        DEBUG ("Account reconnected, request a new Text channel");

        switch (priv->handle_type) {
            case TP_HANDLE_TYPE_CONTACT:
                empathy_dispatcher_chat_with_contact_id (
                    connection, priv->id,
                    chat_connect_channel_reconnected,
                    chat);
                break;
            case TP_HANDLE_TYPE_ROOM:
                empathy_dispatcher_join_muc (connection,
                    priv->id,
                    chat_connect_channel_reconnected,
                    chat);
                break;
            default:
                g_assert_not_reached ();
                break;
        }
    }
}

static void
chat_composing_remove_timeout (EmpathyChat *chat)
{
    EmpathyChatPriv *priv;

    priv = GET_PRIV (chat);

    if (priv->composing_stop_timeout_id) {
        g_source_remove (priv->composing_stop_timeout_id);
        priv->composing_stop_timeout_id = 0;
    }
}

static gboolean
chat_composing_stop_timeout_cb (EmpathyChat *chat)
{
    EmpathyChatPriv *priv;

    priv = GET_PRIV (chat);

    priv->composing_stop_timeout_id = 0;
    empathy_tp_chat_set_state (priv->tp_chat,
                   TP_CHANNEL_CHAT_STATE_PAUSED);

    return FALSE;
}

static void
chat_composing_start (EmpathyChat *chat)
{
    EmpathyChatPriv *priv;

    priv = GET_PRIV (chat);

    if (priv->composing_stop_timeout_id) {
        /* Just restart the timeout */
        chat_composing_remove_timeout (chat);
    } else {
        empathy_tp_chat_set_state (priv->tp_chat,
                       TP_CHANNEL_CHAT_STATE_COMPOSING);
    }

    priv->composing_stop_timeout_id = g_timeout_add_seconds (
        COMPOSING_STOP_TIMEOUT,
        (GSourceFunc) chat_composing_stop_timeout_cb,
        chat);
}

static void
chat_composing_stop (EmpathyChat *chat)
{
    EmpathyChatPriv *priv;

    priv = GET_PRIV (chat);

    chat_composing_remove_timeout (chat);
    empathy_tp_chat_set_state (priv->tp_chat,
                   TP_CHANNEL_CHAT_STATE_ACTIVE);
}

static void
chat_sent_message_add (EmpathyChat  *chat,
               const gchar *str)
{
    EmpathyChatPriv *priv;
    GSList         *list;
    GSList         *item;

    priv = GET_PRIV (chat);

    /* Save the sent message in our repeat buffer */
    list = priv->sent_messages;

    /* Remove any other occurances of this msg */
    while ((item = g_slist_find_custom (list, str, (GCompareFunc) strcmp)) != NULL) {
        list = g_slist_remove_link (list, item);
        g_free (item->data);
        g_slist_free1 (item);
    }

    /* Trim the list to the last 10 items */
    while (g_slist_length (list) > 10) {
        item = g_slist_last (list);
        if (item) {
            list = g_slist_remove_link (list, item);
            g_free (item->data);
            g_slist_free1 (item);
        }
    }

    /* Add new message */
    list = g_slist_prepend (list, g_strdup (str));

    /* Set list and reset the index */
    priv->sent_messages = list;
    priv->sent_messages_index = -1;
}

static const gchar *
chat_sent_message_get_next (EmpathyChat *chat)
{
    EmpathyChatPriv *priv;
    gint            max;

    priv = GET_PRIV (chat);

    if (!priv->sent_messages) {
        DEBUG ("No sent messages, next message is NULL");
        return NULL;
    }

    max = g_slist_length (priv->sent_messages) - 1;

    if (priv->sent_messages_index < max) {
        priv->sent_messages_index++;
    }

    DEBUG ("Returning next message index:%d", priv->sent_messages_index);

    return g_slist_nth_data (priv->sent_messages, priv->sent_messages_index);
}

static const gchar *
chat_sent_message_get_last (EmpathyChat *chat)
{
    EmpathyChatPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CHAT (chat), NULL);

    priv = GET_PRIV (chat);

    if (!priv->sent_messages) {
        DEBUG ("No sent messages, last message is NULL");
        return NULL;
    }

    if (priv->sent_messages_index >= 0) {
        priv->sent_messages_index--;
    }

    DEBUG ("Returning last message index:%d", priv->sent_messages_index);

    return g_slist_nth_data (priv->sent_messages, priv->sent_messages_index);
}

static void
chat_send (EmpathyChat  *chat,
       const gchar *msg)
{
    EmpathyChatPriv *priv;
    EmpathyMessage  *message;

    if (EMP_STR_EMPTY (msg)) {
        return;
    }

    priv = GET_PRIV (chat);

    chat_sent_message_add (chat, msg);

    if (strcmp (msg, "/clear") == 0) {
        empathy_chat_view_clear (chat->view);
        return;
    }

    message = empathy_message_new_from_entry (msg);

    if (message == NULL) {
        empathy_chat_view_append_event (chat->view,
            _("Unsupported command"));
    } else {
        empathy_tp_chat_send (priv->tp_chat, message);
        g_object_unref (message);
    }
}

static void
chat_input_text_view_send (EmpathyChat *chat)
{
    EmpathyChatPriv *priv;
    GtkTextBuffer  *buffer;
    GtkTextIter     start, end;
    gchar          *msg;

    priv = GET_PRIV (chat);

    buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (chat->input_text_view));

    gtk_text_buffer_get_bounds (buffer, &start, &end);
    msg = gtk_text_buffer_get_text (buffer, &start, &end, FALSE);

    /* clear the input field */
    gtk_text_buffer_set_text (buffer, "", -1);

    chat_send (chat, msg);
    g_free (msg);
}

static void
chat_state_changed_cb (EmpathyTpChat      *tp_chat,
               EmpathyContact     *contact,
               TpChannelChatState  state,
               EmpathyChat        *chat)
{
    EmpathyChatPriv *priv;
    GList          *l;
    gboolean        was_composing;

    priv = GET_PRIV (chat);

    if (empathy_contact_is_user (contact)) {
        /* We don't care about our own chat state */
        return;
    }

    was_composing = (priv->compositors != NULL);

    /* Find the contact in the list. After that l is the list elem or NULL */
    for (l = priv->compositors; l; l = l->next) {
        if (contact == l->data) {
            break;
        }
    }

    switch (state) {
    case TP_CHANNEL_CHAT_STATE_GONE:
    case TP_CHANNEL_CHAT_STATE_INACTIVE:
    case TP_CHANNEL_CHAT_STATE_PAUSED:
    case TP_CHANNEL_CHAT_STATE_ACTIVE:
        /* Contact is not composing */
        if (l) {
            priv->compositors = g_list_remove_link (priv->compositors, l);
            g_object_unref (l->data);
            g_list_free1 (l);
        }
        break;
    case TP_CHANNEL_CHAT_STATE_COMPOSING:
        /* Contact is composing */
        if (!l) {
            priv->compositors = g_list_prepend (priv->compositors,
                                g_object_ref (contact));
        }
        break;
    default:
        g_assert_not_reached ();
    }

    DEBUG ("Was composing: %s now composing: %s",
        was_composing ? "yes" : "no",
        priv->compositors ? "yes" : "no");

    if ((was_composing && !priv->compositors) ||
        (!was_composing && priv->compositors)) {
        /* Composing state changed */
        g_signal_emit (chat, signals[COMPOSING], 0,
                   priv->compositors != NULL);
    }
}

static void
chat_message_received (EmpathyChat *chat, EmpathyMessage *message)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    EmpathyContact  *sender;

    sender = empathy_message_get_sender (message);

    DEBUG ("Appending new message from %s (%d)",
        empathy_contact_get_name (sender),
        empathy_contact_get_handle (sender));

    empathy_chat_view_append_message (chat->view, message);

    /* We received a message so the contact is no longer composing */
    chat_state_changed_cb (priv->tp_chat, sender,
                   TP_CHANNEL_CHAT_STATE_ACTIVE,
                   chat);

    g_signal_emit (chat, signals[NEW_MESSAGE], 0, message);
}

static void
chat_message_received_cb (EmpathyTpChat  *tp_chat,
              EmpathyMessage *message,
              EmpathyChat    *chat)
{
    chat_message_received (chat, message);
    empathy_tp_chat_acknowledge_message (tp_chat, message);
}

static void
chat_send_error_cb (EmpathyTpChat          *tp_chat,
            const gchar            *message_body,
            TpChannelTextSendError  error_code,
            EmpathyChat            *chat)
{
    const gchar *error;
    gchar       *str;

    switch (error_code) {
    case TP_CHANNEL_TEXT_SEND_ERROR_OFFLINE:
        error = _("offline");
        break;
    case TP_CHANNEL_TEXT_SEND_ERROR_INVALID_CONTACT:
        error = _("invalid contact");
        break;
    case TP_CHANNEL_TEXT_SEND_ERROR_PERMISSION_DENIED:
        error = _("permission denied");
        break;
    case TP_CHANNEL_TEXT_SEND_ERROR_TOO_LONG:
        error = _("too long message");
        break;
    case TP_CHANNEL_TEXT_SEND_ERROR_NOT_IMPLEMENTED:
        error = _("not implemented");
        break;
    default:
        error = _("unknown");
        break;
    }

    str = g_strdup_printf (_("Error sending message '%s': %s"),
                   message_body,
                   error);
    empathy_chat_view_append_event (chat->view, str);
    g_free (str);
}

static void
chat_property_changed_cb (EmpathyTpChat *tp_chat,
              const gchar   *name,
              GValue        *value,
              EmpathyChat   *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

    if (!tp_strdiff (name, "subject")) {
        g_free (priv->subject);
        priv->subject = g_value_dup_string (value);
        g_object_notify (G_OBJECT (chat), "subject");

        if (EMP_STR_EMPTY (priv->subject)) {
            gtk_widget_hide (priv->hbox_topic);
        } else {
            gtk_label_set_text (GTK_LABEL (priv->label_topic), priv->subject);
            gtk_widget_show (priv->hbox_topic);
        }
        if (priv->block_events_timeout_id == 0) {
            gchar *str;

            if (!EMP_STR_EMPTY (priv->subject)) {
                str = g_strdup_printf (_("Topic set to: %s"), priv->subject);
            } else {
                str = g_strdup (_("No topic defined"));
            }
            empathy_chat_view_append_event (EMPATHY_CHAT (chat)->view, str);
            g_free (str);
        }
    }
    else if (!tp_strdiff (name, "name")) {
        g_free (priv->name);
        priv->name = g_value_dup_string (value);
        g_object_notify (G_OBJECT (chat), "name");
    }
}

static void
chat_input_text_buffer_changed_cb (GtkTextBuffer *buffer,
                                   EmpathyChat    *chat)
{
    EmpathyChatPriv *priv;
    GtkTextIter     start, end;
    gchar          *str;
    gboolean        spell_checker = FALSE;

    priv = GET_PRIV (chat);

    if (gtk_text_buffer_get_char_count (buffer) == 0) {
        chat_composing_stop (chat);
    } else {
        chat_composing_start (chat);
    }

    empathy_conf_get_bool (empathy_conf_get (),
                           EMPATHY_PREFS_CHAT_SPELL_CHECKER_ENABLED,
                           &spell_checker);

    gtk_text_buffer_get_start_iter (buffer, &start);

    if (!spell_checker) {
        gtk_text_buffer_get_end_iter (buffer, &end);
        gtk_text_buffer_remove_tag_by_name (buffer, "misspelled", &start, &end);
        return;
    }

    if (!empathy_spell_supported ()) {
        return;
    }

    /* NOTE: this is really inefficient, we shouldn't have to
       reiterate the whole buffer each time and check each work
       every time. */
    while (TRUE) {
        gboolean correct = FALSE;

        /* if at start */
        if (gtk_text_iter_is_start (&start)) {
            end = start;

            if (!gtk_text_iter_forward_word_end (&end)) {
                /* no whole word yet */
                break;
            }
        } else {
            if (!gtk_text_iter_forward_word_end (&end)) {
                /* must be the end of the buffer */
                break;
            }

            start = end;
            gtk_text_iter_backward_word_start (&start);
        }

        str = gtk_text_buffer_get_text (buffer, &start, &end, FALSE);

        /* spell check string if not a command */
        if (str[0] != '/') {
            correct = empathy_spell_check (str);
        } else {
            correct = TRUE;
        }

        if (!correct) {
            gtk_text_buffer_apply_tag_by_name (buffer, "misspelled", &start, &end);
        } else {
            gtk_text_buffer_remove_tag_by_name (buffer, "misspelled", &start, &end);
        }

        g_free (str);

        /* set start iter to the end iters position */
        start = end;
    }
}

static gboolean
chat_input_key_press_event_cb (GtkWidget   *widget,
                   GdkEventKey *event,
                   EmpathyChat *chat)
{
    EmpathyChatPriv *priv;
    GtkAdjustment  *adj;
    gdouble         val;
    GtkWidget      *text_view_sw;

    priv = GET_PRIV (chat);

    /* Catch ctrl+up/down so we can traverse messages we sent */
    if ((event->state & GDK_CONTROL_MASK) &&
        (event->keyval == GDK_Up ||
         event->keyval == GDK_Down)) {
        GtkTextBuffer *buffer;
        const gchar   *str;

        buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (chat->input_text_view));

        if (event->keyval == GDK_Up) {
            str = chat_sent_message_get_next (chat);
        } else {
            str = chat_sent_message_get_last (chat);
        }

        g_signal_handlers_block_by_func (buffer,
                         chat_input_text_buffer_changed_cb,
                         chat);
        gtk_text_buffer_set_text (buffer, str ? str : "", -1);
        g_signal_handlers_unblock_by_func (buffer,
                           chat_input_text_buffer_changed_cb,
                           chat);

        return TRUE;
    }

    /* Catch enter but not ctrl/shift-enter */
    if (IS_ENTER (event->keyval) &&
        !(event->state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK))) {
        GtkTextView *view;

        /* This is to make sure that kinput2 gets the enter. And if
         * it's handled there we shouldn't send on it. This is because
         * kinput2 uses Enter to commit letters. See:
         * http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=104299
         */

        view = GTK_TEXT_VIEW (chat->input_text_view);
        if (gtk_im_context_filter_keypress (view->im_context, event)) {
            GTK_TEXT_VIEW (chat->input_text_view)->need_im_reset = TRUE;
            return TRUE;
        }

        chat_input_text_view_send (chat);
        return TRUE;
    }

    text_view_sw = gtk_widget_get_parent (GTK_WIDGET (chat->view));

    if (IS_ENTER (event->keyval) &&
        (event->state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK))) {
        /* Newline for shift/control-enter. */
        return FALSE;
    }
    if (!(event->state & GDK_CONTROL_MASK) &&
        event->keyval == GDK_Page_Up) {
        adj = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (text_view_sw));
        gtk_adjustment_set_value (adj, gtk_adjustment_get_value (adj) - gtk_adjustment_get_page_size (adj));
        return TRUE;
    }
    if ((event->state & GDK_CONTROL_MASK) != GDK_CONTROL_MASK &&
        event->keyval == GDK_Page_Down) {
        adj = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (text_view_sw));
        val = MIN (gtk_adjustment_get_value (adj) + gtk_adjustment_get_page_size (adj),
               gtk_adjustment_get_upper (adj) - gtk_adjustment_get_page_size (adj));
        gtk_adjustment_set_value (adj, val);
        return TRUE;
    }
    if (!(event->state & (GDK_CONTROL_MASK | GDK_SHIFT_MASK)) &&
        event->keyval == GDK_Tab) {
        GtkTextBuffer *buffer;
        GtkTextIter    start, current;
        gchar         *nick, *completed;
        GList         *list, *completed_list;
        gboolean       is_start_of_buffer;

        buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (EMPATHY_CHAT (chat)->input_text_view));
        gtk_text_buffer_get_iter_at_mark (buffer, &current, gtk_text_buffer_get_insert (buffer));

        /* Get the start of the nick to complete. */
        gtk_text_buffer_get_iter_at_mark (buffer, &start, gtk_text_buffer_get_insert (buffer));
        gtk_text_iter_backward_word_start (&start);
        is_start_of_buffer = gtk_text_iter_is_start (&start);

        list = empathy_contact_list_get_members (EMPATHY_CONTACT_LIST (priv->tp_chat));
        g_completion_add_items (priv->completion, list);

        nick = gtk_text_buffer_get_text (buffer, &start, &current, FALSE);
        completed_list = g_completion_complete (priv->completion,
                            nick,
                            &completed);

        g_free (nick);

        if (completed) {
            guint        len;
            const gchar *text;
            gchar       *complete_char = NULL;

            gtk_text_buffer_delete (buffer, &start, &current);

            len = g_list_length (completed_list);

            if (len == 1) {
                /* If we only have one hit, use that text
                 * instead of the text in completed since the
                 * completed text will use the typed string
                 * which might be cased all wrong.
                 * Fixes #120876
                 * */
                text = empathy_contact_get_name (completed_list->data);
            } else {
                text = completed;
            }

            gtk_text_buffer_insert_at_cursor (buffer, text, strlen (text));

            if (len == 1 && is_start_of_buffer &&
                empathy_conf_get_string (empathy_conf_get (),
                             EMPATHY_PREFS_CHAT_NICK_COMPLETION_CHAR,
                             &complete_char) &&
                complete_char != NULL) {
                gtk_text_buffer_insert_at_cursor (buffer,
                                  complete_char,
                                  strlen (complete_char));
                gtk_text_buffer_insert_at_cursor (buffer, " ", 1);
                g_free (complete_char);
            }

            g_free (completed);
        }

        g_completion_clear_items (priv->completion);

        g_list_foreach (list, (GFunc) g_object_unref, NULL);
        g_list_free (list);

        return TRUE;
    }

    return FALSE;
}

static gboolean
chat_text_view_focus_in_event_cb (GtkWidget  *widget,
                  GdkEvent   *event,
                  EmpathyChat *chat)
{
    gtk_widget_grab_focus (chat->input_text_view);

    return TRUE;
}

static gboolean
chat_input_set_size_request_idle (gpointer sw)
{
    gtk_widget_set_size_request (sw, -1, MAX_INPUT_HEIGHT);

    return FALSE;
}

static void
chat_input_size_request_cb (GtkWidget      *widget,
                GtkRequisition *requisition,
                EmpathyChat    *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    GtkWidget       *sw;

    sw = gtk_widget_get_parent (widget);
    if (requisition->height >= MAX_INPUT_HEIGHT && !priv->has_input_vscroll) {
        g_idle_add (chat_input_set_size_request_idle, sw);
        gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                        GTK_POLICY_NEVER,
                        GTK_POLICY_ALWAYS);
        priv->has_input_vscroll = TRUE;
    }

    if (requisition->height < MAX_INPUT_HEIGHT && priv->has_input_vscroll) {
        gtk_widget_set_size_request (sw, -1, -1);
        gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                        GTK_POLICY_NEVER,
                        GTK_POLICY_NEVER);
        priv->has_input_vscroll = FALSE;
    }
}

static void
chat_input_realize_cb (GtkWidget   *widget,
               EmpathyChat *chat)
{
    DEBUG ("Setting focus to the input text view");
    gtk_widget_grab_focus (widget);
}

static void
chat_insert_smiley_activate_cb (EmpathySmileyManager *manager,
                EmpathySmiley        *smiley,
                gpointer              user_data)
{
    EmpathyChat   *chat = EMPATHY_CHAT (user_data);
    GtkTextBuffer *buffer;
    GtkTextIter    iter;

    buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (chat->input_text_view));

    gtk_text_buffer_get_end_iter (buffer, &iter);
    gtk_text_buffer_insert (buffer, &iter, smiley->str, -1);

    gtk_text_buffer_get_end_iter (buffer, &iter);
    gtk_text_buffer_insert (buffer, &iter, " ", -1);
}

typedef struct {
    EmpathyChat  *chat;
    gchar       *word;

    GtkTextIter  start;
    GtkTextIter  end;
} EmpathyChatSpell;

static EmpathyChatSpell *
chat_spell_new (EmpathyChat  *chat,
        const gchar *word,
        GtkTextIter  start,
        GtkTextIter  end)
{
    EmpathyChatSpell *chat_spell;

    chat_spell = g_slice_new0 (EmpathyChatSpell);

    chat_spell->chat = g_object_ref (chat);
    chat_spell->word = g_strdup (word);
    chat_spell->start = start;
    chat_spell->end = end;

    return chat_spell;
}

static void
chat_spell_free (EmpathyChatSpell *chat_spell)
{
    g_object_unref (chat_spell->chat);
    g_free (chat_spell->word);
    g_slice_free (EmpathyChatSpell, chat_spell);
}

static void
chat_spelling_menu_activate_cb (GtkMenuItem     *menu_item,
                                EmpathyChatSpell *chat_spell)
{
    empathy_chat_correct_word (chat_spell->chat,
                               &(chat_spell->start),
                               &(chat_spell->end),
                               gtk_menu_item_get_label (menu_item));
}

static GtkWidget *
chat_spelling_build_menu (EmpathyChatSpell *chat_spell)
{
    GtkWidget *menu, *menu_item;
    GList     *suggestions, *l;

    menu = gtk_menu_new ();
    suggestions = empathy_spell_get_suggestions (chat_spell->word);
    if (suggestions == NULL) {
        menu_item = gtk_menu_item_new_with_label (_("(No Suggestions)"));
    gtk_widget_set_sensitive (menu_item, FALSE);
        gtk_menu_shell_append (GTK_MENU_SHELL (menu), menu_item);
    } else {
        for (l = suggestions; l; l = l->next) {
            menu_item = gtk_menu_item_new_with_label (l->data);
            g_signal_connect (G_OBJECT (menu_item),
                          "activate",
                          G_CALLBACK (chat_spelling_menu_activate_cb),
                          chat_spell);
            gtk_menu_shell_append (GTK_MENU_SHELL (menu), menu_item);
        }
    }
    empathy_spell_free_suggestions (suggestions);

    gtk_widget_show_all (menu);

    return menu;
}

static void
chat_text_send_cb (GtkMenuItem *menuitem,
           EmpathyChat *chat)
{
    chat_input_text_view_send (chat);
}

static void
chat_input_populate_popup_cb (GtkTextView *view,
                  GtkMenu     *menu,
                  EmpathyChat *chat)
{
    EmpathyChatPriv      *priv;
    GtkTextBuffer        *buffer;
    GtkTextTagTable      *table;
    GtkTextTag           *tag;
    gint                  x, y;
    GtkTextIter           iter, start, end;
    GtkWidget            *item;
    gchar                *str = NULL;
    EmpathyChatSpell     *chat_spell;
    GtkWidget            *spell_menu;
    EmpathySmileyManager *smiley_manager;
    GtkWidget            *smiley_menu;
    GtkWidget            *image;

    priv = GET_PRIV (chat);
    buffer = gtk_text_view_get_buffer (view);

    /* Add the emoticon menu. */
    item = gtk_separator_menu_item_new ();
    gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
    gtk_widget_show (item);

    item = gtk_image_menu_item_new_with_mnemonic (_("Insert Smiley"));
    image = gtk_image_new_from_icon_name ("face-smile",
                          GTK_ICON_SIZE_MENU);
    gtk_image_menu_item_set_image (GTK_IMAGE_MENU_ITEM (item), image);
    gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
    gtk_widget_show (item);

    smiley_manager = empathy_smiley_manager_dup_singleton ();
    smiley_menu = empathy_smiley_menu_new (smiley_manager,
                           chat_insert_smiley_activate_cb,
                           chat);
    gtk_menu_item_set_submenu (GTK_MENU_ITEM (item), smiley_menu);
    g_object_unref (smiley_manager);

    /* Add the Send menu item. */
    gtk_text_buffer_get_bounds (buffer, &start, &end);
    str = gtk_text_buffer_get_text (buffer, &start, &end, FALSE);
    if (!EMP_STR_EMPTY (str)) {
        item = gtk_menu_item_new_with_mnemonic (_("_Send"));
        g_signal_connect (G_OBJECT (item), "activate",
                  G_CALLBACK (chat_text_send_cb), chat);
        gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
        gtk_widget_show (item);
    }
    str = NULL;

    /* Add the spell check menu item. */
    table = gtk_text_buffer_get_tag_table (buffer);
    tag = gtk_text_tag_table_lookup (table, "misspelled");
    gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
    gtk_text_view_window_to_buffer_coords (GTK_TEXT_VIEW (view),
                           GTK_TEXT_WINDOW_WIDGET,
                           x, y,
                           &x, &y);
    gtk_text_view_get_iter_at_location (GTK_TEXT_VIEW (view), &iter, x, y);
    start = end = iter;
    if (gtk_text_iter_backward_to_tag_toggle (&start, tag) &&
        gtk_text_iter_forward_to_tag_toggle (&end, tag)) {

        str = gtk_text_buffer_get_text (buffer,
                        &start, &end, FALSE);
    }
    if (!EMP_STR_EMPTY (str)) {
        chat_spell = chat_spell_new (chat, str, start, end);
        g_object_set_data_full (G_OBJECT (menu),
                    "chat_spell", chat_spell,
                    (GDestroyNotify) chat_spell_free);

        item = gtk_separator_menu_item_new ();
        gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
        gtk_widget_show (item);

        item = gtk_image_menu_item_new_with_mnemonic (_("_Spelling Suggestions"));
        image = gtk_image_new_from_icon_name (GTK_STOCK_SPELL_CHECK,
                              GTK_ICON_SIZE_MENU);
        gtk_image_menu_item_set_image (GTK_IMAGE_MENU_ITEM (item), image);

        spell_menu = chat_spelling_build_menu (chat_spell);
        gtk_menu_item_set_submenu (GTK_MENU_ITEM (item), spell_menu);

        gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
        gtk_widget_show (item);
    }
}

static gboolean
chat_log_filter (EmpathyMessage *message,
         gpointer user_data)
{
    EmpathyChat *chat = (EmpathyChat *) user_data;
    EmpathyChatPriv *priv = GET_PRIV (chat);
    const GList *pending;

    pending = empathy_tp_chat_get_pending_messages (priv->tp_chat);

    for (; pending; pending = g_list_next (pending)) {
        if (empathy_message_equal (message, pending->data)) {
            return FALSE;
        }
    }

    return TRUE;
}

static void
chat_add_logs (EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    gboolean         is_chatroom;
    GList           *messages, *l;

    if (!priv->id) {
        return;
    }

    /* Turn off scrolling temporarily */
    empathy_chat_view_scroll (chat->view, FALSE);

    /* Add messages from last conversation */
    is_chatroom = priv->handle_type == TP_HANDLE_TYPE_ROOM;

    messages = empathy_log_manager_get_filtered_messages (priv->log_manager,
                                  priv->account,
                                  priv->id,
                                  is_chatroom,
                                  5,
                                  chat_log_filter,
                                  chat);

    for (l = messages; l; l = g_list_next (l)) {
        empathy_chat_view_append_message (chat->view, l->data);
        g_object_unref (l->data);
    }

    g_list_free (messages);

    /* Turn back on scrolling */
    empathy_chat_view_scroll (chat->view, TRUE);
}

static gint
chat_contacts_completion_func (const gchar *s1,
                   const gchar *s2,
                   gsize        n)
{
    gchar *tmp, *nick1, *nick2;
    gint   ret;

    if (s1 == s2) {
        return 0;
    }
    if (!s1 || !s2) {
        return s1 ? -1 : +1;
    }

    tmp = g_utf8_normalize (s1, -1, G_NORMALIZE_DEFAULT);
    nick1 = g_utf8_casefold (tmp, -1);
    g_free (tmp);

    tmp = g_utf8_normalize (s2, -1, G_NORMALIZE_DEFAULT);
    nick2 = g_utf8_casefold (tmp, -1);
    g_free (tmp);

    ret = strncmp (nick1, nick2, n);

    g_free (nick1);
    g_free (nick2);

    return ret;
}

static gchar *
build_part_message (guint           reason,
            const gchar    *name,
            EmpathyContact *actor,
            const gchar    *message)
{
    GString *s = g_string_new ("");
    const gchar *actor_name = NULL;

    if (actor != NULL) {
        actor_name = empathy_contact_get_name (actor);
    }

    /* Having an actor only really makes sense for a few actions... */
    switch (reason) {
    case TP_CHANNEL_GROUP_CHANGE_REASON_OFFLINE:
        g_string_append_printf (s, _("%s has disconnected"), name);
        break;
    case TP_CHANNEL_GROUP_CHANGE_REASON_KICKED:
        if (actor_name != NULL) {
            /* translators: reverse the order of these arguments
             * if the kicked should come before the kicker in your locale.
             */
            g_string_append_printf (s, _("%1$s was kicked by %2$s"),
                name, actor_name);
        } else {
            g_string_append_printf (s, _("%s was kicked"), name);
        }
        break;
    case TP_CHANNEL_GROUP_CHANGE_REASON_BANNED:
        if (actor_name != NULL) {
            /* translators: reverse the order of these arguments
             * if the banned should come before the banner in your locale.
             */
            g_string_append_printf (s, _("%1$s was banned by %2$s"),
                name, actor_name);
        } else {
            g_string_append_printf (s, _("%s was banned"), name);
        }
        break;
    default:
        g_string_append_printf (s, _("%s has left the room"), name);
    }

    if (!EMP_STR_EMPTY (message)) {
        /* Note to translators: this string is appended to
         * notifications like "foo has left the room", with the message
         * given by the user living the room. If this poses a problem,
         * please let us know. :-)
         */
        g_string_append_printf (s, _(" (%s)"), message);
    }

    return g_string_free (s, FALSE);
}

static void
chat_members_changed_cb (EmpathyTpChat  *tp_chat,
             EmpathyContact *contact,
             EmpathyContact *actor,
             guint           reason,
             gchar          *message,
             gboolean        is_member,
             EmpathyChat    *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    const gchar *name = empathy_contact_get_name (contact);
    gchar *str;

    if (priv->block_events_timeout_id != 0)
        return;

    if (is_member) {
        str = g_strdup_printf (_("%s has joined the room"),
                       name);
    } else {
        str = build_part_message (reason, name, actor, message);
    }

    empathy_chat_view_append_event (chat->view, str);
    g_free (str);
}

static gboolean
chat_reset_size_request (gpointer widget)
{
    gtk_widget_set_size_request (widget, -1, -1);

    return FALSE;
}

static void
chat_update_contacts_visibility (EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    gboolean show;

    show = priv->remote_contact == NULL && priv->show_contacts;

    if (!priv->scrolled_window_contacts) {
        return;
    }

    if (show && priv->contact_list_view == NULL) {
        EmpathyContactListStore *store;
        gint                     min_width;

        /* We are adding the contact list to the chat, we don't want the
         * chat view to become too small. If the chat view is already
         * smaller than 250 make sure that size won't change. If the
         * chat view is bigger the contact list will take some space on
         * it but we make sure the chat view don't become smaller than
         * 250. Relax the size request once the resize is done */
        min_width = MIN (priv->vbox_left->allocation.width, 250);
        gtk_widget_set_size_request (priv->vbox_left, min_width, -1);
        g_idle_add (chat_reset_size_request, priv->vbox_left);

        if (priv->contacts_width > 0) {
            gtk_paned_set_position (GTK_PANED (priv->hpaned),
                        priv->contacts_width);
        }

        store = empathy_contact_list_store_new (EMPATHY_CONTACT_LIST (priv->tp_chat));
        priv->contact_list_view = GTK_WIDGET (empathy_contact_list_view_new (store,
            EMPATHY_CONTACT_LIST_FEATURE_CONTACT_TOOLTIP,
            EMPATHY_CONTACT_FEATURE_CHAT |
            EMPATHY_CONTACT_FEATURE_CALL |
            EMPATHY_CONTACT_FEATURE_LOG |
            EMPATHY_CONTACT_FEATURE_INFO));
        gtk_container_add (GTK_CONTAINER (priv->scrolled_window_contacts),
                   priv->contact_list_view);
        gtk_widget_show (priv->contact_list_view);
        gtk_widget_show (priv->scrolled_window_contacts);
        g_object_unref (store);
    } else if (!show) {
        priv->contacts_width = gtk_paned_get_position (GTK_PANED (priv->hpaned));
        gtk_widget_hide (priv->scrolled_window_contacts);
        if (priv->contact_list_view != NULL) {
            gtk_widget_destroy (priv->contact_list_view);
            priv->contact_list_view = NULL;
        }
    }
}

void
empathy_chat_set_show_contacts (EmpathyChat *chat,
                gboolean     show)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

    priv->show_contacts = show;

    chat_update_contacts_visibility (chat);

    g_object_notify (G_OBJECT (chat), "show-contacts");
}

static void
chat_remote_contact_changed_cb (EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

    if (priv->remote_contact != NULL) {
        g_object_unref (priv->remote_contact);
        priv->remote_contact = NULL;
    }

    priv->remote_contact = empathy_tp_chat_get_remote_contact (priv->tp_chat);
    if (priv->remote_contact != NULL) {
        g_object_ref (priv->remote_contact);
        priv->handle_type = TP_HANDLE_TYPE_CONTACT;
        g_free (priv->id);
        priv->id = g_strdup (empathy_contact_get_id (priv->remote_contact));
    }
    else if (priv->tp_chat != NULL) {
        TpChannel *channel;

        channel = empathy_tp_chat_get_channel (priv->tp_chat);
        g_object_get (channel, "handle-type", &priv->handle_type, NULL);
        g_free (priv->id);
        priv->id = g_strdup (empathy_tp_chat_get_id (priv->tp_chat));
    }

    chat_update_contacts_visibility (chat);

    g_object_notify (G_OBJECT (chat), "remote-contact");
    g_object_notify (G_OBJECT (chat), "id");
}

static void
chat_destroy_cb (EmpathyTpChat *tp_chat,
         EmpathyChat   *chat)
{
    EmpathyChatPriv *priv;

    priv = GET_PRIV (chat);

    if (!priv->tp_chat) {
        return;
    }

    chat_composing_remove_timeout (chat);
    g_object_unref (priv->tp_chat);
    priv->tp_chat = NULL;
    g_object_notify (G_OBJECT (chat), "tp-chat");

    empathy_chat_view_append_event (chat->view, _("Disconnected"));
    gtk_widget_set_sensitive (chat->input_text_view, FALSE);
    empathy_chat_set_show_contacts (chat, FALSE);
}

static void
show_pending_messages (EmpathyChat *chat) {
    EmpathyChatPriv *priv = GET_PRIV (chat);
    const GList *messages, *l;

    if (chat->view == NULL || priv->tp_chat == NULL)
        return;

    messages = empathy_tp_chat_get_pending_messages (priv->tp_chat);

    for (l = messages; l != NULL ; l = g_list_next (l)) {
        EmpathyMessage *message = EMPATHY_MESSAGE (l->data);
        chat_message_received (chat, message);
    }
    empathy_tp_chat_acknowledge_messages (priv->tp_chat, messages);
}

static void
chat_create_ui (EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    GtkBuilder      *gui;
    GList           *list = NULL;
    gchar           *filename;
    GtkTextBuffer   *buffer;

    filename = empathy_file_lookup ("empathy-chat.ui",
                    "libempathy-gtk");
    gui = empathy_builder_get_file (filename,
                    "chat_widget", &priv->widget,
                    "hpaned", &priv->hpaned,
                    "vbox_left", &priv->vbox_left,
                    "scrolled_window_chat", &priv->scrolled_window_chat,
                    "scrolled_window_input", &priv->scrolled_window_input,
                    "hbox_topic", &priv->hbox_topic,
                    "label_topic", &priv->label_topic,
                    "scrolled_window_contacts", &priv->scrolled_window_contacts,
                    NULL);
    g_free (filename);

    /* Add message view. */
    chat->view = empathy_theme_manager_create_view (empathy_theme_manager_get ());
    g_signal_connect (chat->view, "focus_in_event",
              G_CALLBACK (chat_text_view_focus_in_event_cb),
              chat);
    gtk_container_add (GTK_CONTAINER (priv->scrolled_window_chat),
               GTK_WIDGET (chat->view));
    gtk_widget_show (GTK_WIDGET (chat->view));

    /* Add input GtkTextView */
    chat->input_text_view = g_object_new (GTK_TYPE_TEXT_VIEW,
                          "pixels-above-lines", 2,
                          "pixels-below-lines", 2,
                          "pixels-inside-wrap", 1,
                          "right-margin", 2,
                          "left-margin", 2,
                          "wrap-mode", GTK_WRAP_WORD_CHAR,
                          NULL);
    g_signal_connect (chat->input_text_view, "key-press-event",
              G_CALLBACK (chat_input_key_press_event_cb),
              chat);
    g_signal_connect (chat->input_text_view, "size-request",
              G_CALLBACK (chat_input_size_request_cb),
              chat);
    g_signal_connect (chat->input_text_view, "realize",
              G_CALLBACK (chat_input_realize_cb),
              chat);
    g_signal_connect (chat->input_text_view, "populate-popup",
              G_CALLBACK (chat_input_populate_popup_cb),
              chat);
    buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (chat->input_text_view));
    g_signal_connect (buffer, "changed",
              G_CALLBACK (chat_input_text_buffer_changed_cb),
              chat);
    gtk_text_buffer_create_tag (buffer, "misspelled",
                    "underline", PANGO_UNDERLINE_ERROR,
                    NULL);
    gtk_container_add (GTK_CONTAINER (priv->scrolled_window_input),
               chat->input_text_view);
    gtk_widget_show (chat->input_text_view);

    /* Create contact list */
    chat_update_contacts_visibility (chat);

    /* Initialy hide the topic, will be shown if not empty */
    gtk_widget_hide (priv->hbox_topic);

    /* Set widget focus order */
    list = g_list_append (NULL, priv->scrolled_window_input);
    gtk_container_set_focus_chain (GTK_CONTAINER (priv->vbox_left), list);
    g_list_free (list);

    list = g_list_append (NULL, priv->vbox_left);
    list = g_list_append (list, priv->scrolled_window_contacts);
    gtk_container_set_focus_chain (GTK_CONTAINER (priv->hpaned), list);
    g_list_free (list);

    list = g_list_append (NULL, priv->hpaned);
    list = g_list_append (list, priv->hbox_topic);
    gtk_container_set_focus_chain (GTK_CONTAINER (priv->widget), list);
    g_list_free (list);

    /* Add the main widget in the chat widget */
    gtk_container_add (GTK_CONTAINER (chat), priv->widget);
    g_object_unref (gui);
}

static void
chat_size_request (GtkWidget      *widget,
           GtkRequisition *requisition)
{
  GtkBin *bin = GTK_BIN (widget);
  GtkWidget *child;

  requisition->width = gtk_container_get_border_width (GTK_CONTAINER (widget)) * 2;
  requisition->height = gtk_container_get_border_width (GTK_CONTAINER (widget)) * 2;

  child = gtk_bin_get_child (bin);

  if (child && GTK_WIDGET_VISIBLE (child))
    {
      GtkRequisition child_requisition;

      gtk_widget_size_request (child, &child_requisition);

      requisition->width += child_requisition.width;
      requisition->height += child_requisition.height;
    }
}

static void
chat_size_allocate (GtkWidget     *widget,
            GtkAllocation *allocation)
{
  GtkBin *bin = GTK_BIN (widget);
  GtkAllocation child_allocation;
  GtkWidget *child;

  widget->allocation = *allocation;

  child = gtk_bin_get_child (bin);

  if (child && GTK_WIDGET_VISIBLE (child))
    {
      child_allocation.x = allocation->x + gtk_container_get_border_width (GTK_CONTAINER (widget));
      child_allocation.y = allocation->y + gtk_container_get_border_width (GTK_CONTAINER (widget));
      child_allocation.width = MAX (allocation->width - gtk_container_get_border_width (GTK_CONTAINER (widget)) * 2, 0);
      child_allocation.height = MAX (allocation->height - gtk_container_get_border_width (GTK_CONTAINER (widget)) * 2, 0);

      gtk_widget_size_allocate (child, &child_allocation);
    }
}

static void
chat_finalize (GObject *object)
{
    EmpathyChat     *chat;
    EmpathyChatPriv *priv;

    chat = EMPATHY_CHAT (object);
    priv = GET_PRIV (chat);

    DEBUG ("Finalized: %p", object);

    g_slist_foreach (priv->sent_messages, (GFunc) g_free, NULL);
    g_slist_free (priv->sent_messages);

    g_list_foreach (priv->compositors, (GFunc) g_object_unref, NULL);
    g_list_free (priv->compositors);

    chat_composing_remove_timeout (chat);

    g_signal_handlers_disconnect_by_func (priv->account_manager,
                          chat_new_connection_cb, object);

    g_object_unref (priv->account_manager);
    g_object_unref (priv->log_manager);

    if (priv->tp_chat) {
        g_signal_handlers_disconnect_by_func (priv->tp_chat,
            chat_destroy_cb, chat);
        g_signal_handlers_disconnect_by_func (priv->tp_chat,
            chat_message_received_cb, chat);
        g_signal_handlers_disconnect_by_func (priv->tp_chat,
            chat_send_error_cb, chat);
        g_signal_handlers_disconnect_by_func (priv->tp_chat,
            chat_state_changed_cb, chat);
        g_signal_handlers_disconnect_by_func (priv->tp_chat,
            chat_property_changed_cb, chat);
        g_signal_handlers_disconnect_by_func (priv->tp_chat,
            chat_members_changed_cb, chat);
        g_signal_handlers_disconnect_by_func (priv->tp_chat,
            chat_remote_contact_changed_cb, chat);
        empathy_tp_chat_close (priv->tp_chat);
        g_object_unref (priv->tp_chat);
    }
    if (priv->account) {
        g_object_unref (priv->account);
    }
    if (priv->remote_contact) {
        g_object_unref (priv->remote_contact);
    }

    if (priv->block_events_timeout_id) {
        g_source_remove (priv->block_events_timeout_id);
    }

    g_free (priv->id);
    g_free (priv->name);
    g_free (priv->subject);
    g_completion_free (priv->completion);

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

static void
chat_constructed (GObject *object)
{
    EmpathyChat *chat = EMPATHY_CHAT (object);

    chat_create_ui (chat);
    chat_add_logs (chat);
    show_pending_messages (chat);
}

static void
empathy_chat_class_init (EmpathyChatClass *klass)
{
    GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
    GObjectClass   *object_class = G_OBJECT_CLASS (klass);

    object_class->finalize = chat_finalize;
    object_class->get_property = chat_get_property;
    object_class->set_property = chat_set_property;
    object_class->constructed = chat_constructed;

    widget_class->size_request = chat_size_request;
    widget_class->size_allocate = chat_size_allocate;

    g_object_class_install_property (object_class,
                     PROP_TP_CHAT,
                     g_param_spec_object ("tp-chat",
                                  "Empathy tp chat",
                                  "The tp chat object",
                                  EMPATHY_TYPE_TP_CHAT,
                                  G_PARAM_CONSTRUCT |
                                  G_PARAM_READWRITE |
                                  G_PARAM_STATIC_STRINGS));
    g_object_class_install_property (object_class,
                     PROP_ACCOUNT,
                     g_param_spec_object ("account",
                                  "Account of the chat",
                                  "The account of the chat",
                                  EMPATHY_TYPE_ACCOUNT,
                                  G_PARAM_READABLE |
                                  G_PARAM_STATIC_STRINGS));
    g_object_class_install_property (object_class,
                     PROP_ID,
                     g_param_spec_string ("id",
                                  "Chat's id",
                                  "The id of the chat",
                                  NULL,
                                  G_PARAM_READABLE |
                                  G_PARAM_STATIC_STRINGS));
    g_object_class_install_property (object_class,
                     PROP_NAME,
                     g_param_spec_string ("name",
                                  "Chat's name",
                                  "The name of the chat",
                                  NULL,
                                  G_PARAM_READABLE |
                                  G_PARAM_STATIC_STRINGS));
    g_object_class_install_property (object_class,
                     PROP_SUBJECT,
                     g_param_spec_string ("subject",
                                  "Chat's subject",
                                  "The subject or topic of the chat",
                                  NULL,
                                  G_PARAM_READABLE |
                                  G_PARAM_STATIC_STRINGS));
    g_object_class_install_property (object_class,
                     PROP_REMOTE_CONTACT,
                     g_param_spec_object ("remote-contact",
                                  "The remote contact",
                                  "The remote contact is any",
                                  EMPATHY_TYPE_CONTACT,
                                  G_PARAM_READABLE |
                                  G_PARAM_STATIC_STRINGS));
    g_object_class_install_property (object_class,
                     PROP_SHOW_CONTACTS,
                     g_param_spec_boolean ("show-contacts",
                                   "Contacts' visibility",
                                   "The visibility of the contacts' list",
                                   TRUE,
                                   G_PARAM_READWRITE |
                                   G_PARAM_STATIC_STRINGS));

    signals[COMPOSING] =
        g_signal_new ("composing",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL,
                  g_cclosure_marshal_VOID__BOOLEAN,
                  G_TYPE_NONE,
                  1, G_TYPE_BOOLEAN);

    signals[NEW_MESSAGE] =
        g_signal_new ("new-message",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL,
                  g_cclosure_marshal_VOID__OBJECT,
                  G_TYPE_NONE,
                  1, EMPATHY_TYPE_MESSAGE);

    g_type_class_add_private (object_class, sizeof (EmpathyChatPriv));
}

static gboolean
chat_block_events_timeout_cb (gpointer data)
{
    EmpathyChatPriv *priv = GET_PRIV (data);

    priv->block_events_timeout_id = 0;

    return FALSE;
}

static void
empathy_chat_init (EmpathyChat *chat)
{
    EmpathyChatPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (chat,
        EMPATHY_TYPE_CHAT, EmpathyChatPriv);

    chat->priv = priv;
    priv->log_manager = empathy_log_manager_dup_singleton ();
    priv->contacts_width = -1;
    priv->sent_messages = NULL;
    priv->sent_messages_index = -1;
    priv->account_manager = empathy_account_manager_dup_singleton ();

    g_signal_connect (priv->account_manager,
              "new-connection",
              G_CALLBACK (chat_new_connection_cb),
              chat);

    empathy_conf_get_bool (empathy_conf_get (),
                   EMPATHY_PREFS_CHAT_SHOW_CONTACTS_IN_ROOMS,
                   &priv->show_contacts);

    /* Block events for some time to avoid having "has come online" or
     * "joined" messages. */
    priv->block_events_timeout_id =
        g_timeout_add_seconds (1, chat_block_events_timeout_cb, chat);

    /* Add nick name completion */
    priv->completion = g_completion_new ((GCompletionFunc) empathy_contact_get_name);
    g_completion_set_compare (priv->completion, chat_contacts_completion_func);
}

EmpathyChat *
empathy_chat_new (EmpathyTpChat *tp_chat)
{
    return g_object_new (EMPATHY_TYPE_CHAT, "tp-chat", tp_chat, NULL);
}

EmpathyTpChat *
empathy_chat_get_tp_chat (EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

    g_return_val_if_fail (EMPATHY_IS_CHAT (chat), NULL);

    return priv->tp_chat;
}

void
empathy_chat_set_tp_chat (EmpathyChat   *chat,
              EmpathyTpChat *tp_chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    TpConnection    *connection;

    g_return_if_fail (EMPATHY_IS_CHAT (chat));
    g_return_if_fail (EMPATHY_IS_TP_CHAT (tp_chat));
    g_return_if_fail (empathy_tp_chat_is_ready (tp_chat));

    if (priv->tp_chat) {
        return;
    }

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

    priv->tp_chat = g_object_ref (tp_chat);
    connection = empathy_tp_chat_get_connection (priv->tp_chat);
    priv->account = empathy_account_manager_get_account_for_connection (
                                 priv->account_manager,
                                 connection);
    g_object_ref (priv->account);

    g_signal_connect (tp_chat, "destroy",
              G_CALLBACK (chat_destroy_cb),
              chat);
    g_signal_connect (tp_chat, "message-received",
              G_CALLBACK (chat_message_received_cb),
              chat);
    g_signal_connect (tp_chat, "send-error",
              G_CALLBACK (chat_send_error_cb),
              chat);
    g_signal_connect (tp_chat, "chat-state-changed",
              G_CALLBACK (chat_state_changed_cb),
              chat);
    g_signal_connect (tp_chat, "property-changed",
              G_CALLBACK (chat_property_changed_cb),
              chat);
    g_signal_connect (tp_chat, "members-changed",
              G_CALLBACK (chat_members_changed_cb),
              chat);
    g_signal_connect_swapped (tp_chat, "notify::remote-contact",
                  G_CALLBACK (chat_remote_contact_changed_cb),
                  chat);

    chat_remote_contact_changed_cb (chat);

    if (chat->input_text_view) {
        gtk_widget_set_sensitive (chat->input_text_view, TRUE);
        if (priv->block_events_timeout_id == 0) {
            empathy_chat_view_append_event (chat->view, _("Connected"));
        }
    }

    g_object_notify (G_OBJECT (chat), "tp-chat");
    g_object_notify (G_OBJECT (chat), "id");
    g_object_notify (G_OBJECT (chat), "account");

    /* This is a noop when tp-chat is set at object construction time and causes
     * the pending messages to be show when it's set on the object after it has
     * been created */
    show_pending_messages (chat);
}

EmpathyAccount *
empathy_chat_get_account (EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

    g_return_val_if_fail (EMPATHY_IS_CHAT (chat), NULL);

    return priv->account;
}

const gchar *
empathy_chat_get_id (EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

    g_return_val_if_fail (EMPATHY_IS_CHAT (chat), NULL);

    return priv->id;
}

const gchar *
empathy_chat_get_name (EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    const gchar *ret;

    g_return_val_if_fail (EMPATHY_IS_CHAT (chat), NULL);

    ret = priv->name;
    if (!ret && priv->remote_contact) {
        ret = empathy_contact_get_name (priv->remote_contact);
    }

    if (!ret)
        ret = priv->id;

    return ret ? ret : _("Conversation");
}

const gchar *
empathy_chat_get_subject (EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

    g_return_val_if_fail (EMPATHY_IS_CHAT (chat), NULL);

    return priv->subject;
}

EmpathyContact *
empathy_chat_get_remote_contact (EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

    g_return_val_if_fail (EMPATHY_IS_CHAT (chat), NULL);

    return priv->remote_contact;
}

GtkWidget *
empathy_chat_get_contact_menu (EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    GtkWidget       *menu = NULL;

    g_return_val_if_fail (EMPATHY_IS_CHAT (chat), NULL);

    if (priv->remote_contact) {
        menu = empathy_contact_menu_new (priv->remote_contact,
                         EMPATHY_CONTACT_FEATURE_CALL |
                         EMPATHY_CONTACT_FEATURE_LOG |
                         EMPATHY_CONTACT_FEATURE_INFO);
    }
    else if (priv->contact_list_view) {
        EmpathyContactListView *view;

        view = EMPATHY_CONTACT_LIST_VIEW (priv->contact_list_view);
        menu = empathy_contact_list_view_get_contact_menu (view);
    }

    return menu;
}

void
empathy_chat_clear (EmpathyChat *chat)
{
    g_return_if_fail (EMPATHY_IS_CHAT (chat));

    empathy_chat_view_clear (chat->view);
}

void
empathy_chat_scroll_down (EmpathyChat *chat)
{
    g_return_if_fail (EMPATHY_IS_CHAT (chat));

    empathy_chat_view_scroll_down (chat->view);
}

void
empathy_chat_cut (EmpathyChat *chat)
{
    GtkTextBuffer *buffer;

    g_return_if_fail (EMPATHY_IS_CHAT (chat));

    buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (chat->input_text_view));
    if (gtk_text_buffer_get_has_selection (buffer)) {
        GtkClipboard *clipboard;

        clipboard = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);

        gtk_text_buffer_cut_clipboard (buffer, clipboard, TRUE);
    }
}

void
empathy_chat_copy (EmpathyChat *chat)
{
    GtkTextBuffer *buffer;

    g_return_if_fail (EMPATHY_IS_CHAT (chat));

    if (empathy_chat_view_get_has_selection (chat->view)) {
        empathy_chat_view_copy_clipboard (chat->view);
        return;
    }

    buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (chat->input_text_view));
    if (gtk_text_buffer_get_has_selection (buffer)) {
        GtkClipboard *clipboard;

        clipboard = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);

        gtk_text_buffer_copy_clipboard (buffer, clipboard);
    }
}

void
empathy_chat_paste (EmpathyChat *chat)
{
    GtkTextBuffer *buffer;
    GtkClipboard  *clipboard;
    EmpathyChatPriv *priv;

    g_return_if_fail (EMPATHY_IS_CHAT (chat));

    priv = GET_PRIV (chat);

    if (priv->tp_chat == NULL ||
        !GTK_WIDGET_IS_SENSITIVE (chat->input_text_view))
        return;

    buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (chat->input_text_view));
    clipboard = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);

    gtk_text_buffer_paste_clipboard (buffer, clipboard, NULL, TRUE);
}

void
empathy_chat_correct_word (EmpathyChat  *chat,
              GtkTextIter *start,
              GtkTextIter *end,
              const gchar *new_word)
{
    GtkTextBuffer *buffer;

    g_return_if_fail (chat != NULL);
    g_return_if_fail (new_word != NULL);

    buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (chat->input_text_view));

    gtk_text_buffer_delete (buffer, start, end);
    gtk_text_buffer_insert (buffer, start,
                new_word,
                -1);
}

gboolean
empathy_chat_is_room (EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

    g_return_val_if_fail (EMPATHY_IS_CHAT (chat), FALSE);

    return (priv->handle_type == TP_HANDLE_TYPE_ROOM);
}