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) 2007-2010 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>

#undef G_DISABLE_DEPRECATED /* for GCompletion */
#include <gdk/gdkkeysyms.h>
#include <glib/gi18n-lib.h>
#include <gtk/gtk.h>

#include <telepathy-glib/account-manager.h>
#include <telepathy-glib/util.h>
#include <telepathy-logger/log-manager.h>
#include <libempathy/empathy-contact-list.h>
#include <libempathy/empathy-gsettings.h>
#include <libempathy/empathy-keyring.h>
#include <libempathy/empathy-utils.h>
#include <libempathy/empathy-request-util.h>
#include <libempathy/empathy-chatroom-manager.h>

#include "empathy-chat.h"
#include "empathy-spell.h"
#include "empathy-contact-dialogs.h"
#include "empathy-contact-list-store.h"
#include "empathy-contact-list-view.h"
#include "empathy-contact-menu.h"
#include "empathy-gtk-marshal.h"
#include "empathy-input-text-view.h"
#include "empathy-search-bar.h"
#include "empathy-theme-manager.h"
#include "empathy-smiley-manager.h"
#include "empathy-ui-utils.h"
#include "empathy-string-parser.h"
#include "extensions/extensions.h"

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

#define IS_ENTER(v) (v == GDK_KEY_Return || v == GDK_KEY_ISO_Enter || v == GDK_KEY_KP_Enter)
#define COMPOSING_STOP_TIMEOUT 5

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

    GSettings         *gsettings_chat;
    GSettings         *gsettings_ui;

    TplLogManager     *log_manager;
    TpAccountManager  *account_manager;
    GList             *input_history;
    GList             *input_history_current;
    GList             *compositors;
    GCompletion       *completion;
    guint              composing_stop_timeout_id;
    guint              block_events_timeout_id;
    TpHandleType       handle_type;
    gint               contacts_width;
    gboolean           has_input_vscroll;

    /* TRUE if spell checking is enabled, FALSE otherwise.
     * This is to keep track of the last state of spell checking
     * when it changes. */
    gboolean       spell_checking_enabled;

    /* These store the signal handler ids for the enclosed text entry. */
    gulong         insert_text_id;
    gulong         delete_range_id;
    gulong         notify_cursor_position_id;

    /* Source func ID for update_misspelled_words () */
    guint              update_misspelled_words_id;
    /* Source func ID for save_paned_pos_timeout () */
    guint              save_paned_pos_id;

    GtkWidget         *widget;
    GtkWidget         *hpaned;
    GtkWidget         *vbox_left;
    GtkWidget         *scrolled_window_chat;
    GtkWidget         *scrolled_window_input;
    GtkWidget         *scrolled_window_contacts;
    GtkWidget         *hbox_topic;
    GtkWidget         *expander_topic;
    GtkWidget         *label_topic;
    GtkWidget         *contact_list_view;
    GtkWidget         *info_bar_vbox;
    GtkWidget         *search_bar;

    guint              unread_messages;
    /* TRUE if the pending messages can be displayed. This is to avoid to show
     * pending messages *before* messages from logs. (#603980) */
    gboolean           can_show_pending;

    /* FIXME: retrieving_backlogs flag is a workaround for Bug#610994 and should
     * be differently handled since it introduces another race condition, which
     * is really hard to occur, but still possible.
     *
     * With the current workaround (which has the race above), we need to be
     * sure to ACK any pending messages only when the retrieval of backlogs is
     * finished, that's why using retrieving_backlogs flag.
     * empathy_chat_messages_read () will check this variable and not ACK
     * anything when TRUE. It will be set TRUE at chat_constructed () and set
     * back to FALSE when the backlog has been retrieved and the pending
     * messages actually showed to the user.
     *
     * Race condition introduced with this workaround:
     * Scenario: a message is pending, the user is notified and selects the tab.
     * the tab with a pending message is focused before the messages are properly
     * shown (since the preparation of the window is slower AND async WRT the
     * tab showing), which means the user won't see any new messages (rare but
     * possible), if he/she will change tab focus before the messages are
     * properly shown, the tab will be set as 'seen' and the user won't be
     * notified again about the already notified pending messages when the
     * messages in tab will be properly shown */
    gboolean           retrieving_backlogs;
    gboolean           sms_channel;
};

typedef struct {
    gchar *text; /* Original message that was specified
                  * upon entry creation. */
    gchar *modified_text; /* Message that was modified by user.
                           * When no modifications were made, it is NULL */
} InputHistoryEntry;

enum {
    COMPOSING,
    NEW_MESSAGE,
    PART_COMMAND_ENTERED,
    LAST_SIGNAL
};

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

static guint signals[LAST_SIGNAL] = { 0 };

G_DEFINE_TYPE (EmpathyChat, empathy_chat, GTK_TYPE_BIN);

static gboolean update_misspelled_words (gpointer data);

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_take_string (value, empathy_chat_dup_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;
    case PROP_SMS_CHANNEL:
        g_value_set_boolean (value, priv->sms_channel);
        break;
    case PROP_N_MESSAGES_SENDING:
        g_value_set_uint (value,
            empathy_chat_get_n_messages_sending (chat));
        break;
    case PROP_NB_UNREAD_MESSAGES:
        g_value_set_uint (value,
            empathy_chat_get_nb_unread_messages (chat));
        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
account_reconnected (EmpathyChat *chat,
            TpAccount *account)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

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

    /* FIXME: Ideally we should ask to handle ourself the channel so we can
    * report the error if any but this is blocked by
    * https://bugs.freedesktop.org/show_bug.cgi?id=13422 */
    switch (priv->handle_type) {
        case TP_HANDLE_TYPE_CONTACT:
            if (priv->sms_channel)
                empathy_sms_contact_id (
                    account, priv->id,
                    TP_USER_ACTION_TIME_NOT_USER_ACTION);
            else
                empathy_chat_with_contact_id (
                    account, priv->id,
                    TP_USER_ACTION_TIME_NOT_USER_ACTION);
            break;
        case TP_HANDLE_TYPE_ROOM:
            empathy_join_muc (account, priv->id,
                TP_USER_ACTION_TIME_NOT_USER_ACTION);
            break;
        case TP_HANDLE_TYPE_NONE:
        case TP_HANDLE_TYPE_LIST:
        case TP_HANDLE_TYPE_GROUP:
        default:
            g_assert_not_reached ();
            break;
    }

    g_object_unref (chat);
}

static void
chat_new_connection_cb (TpAccount   *account,
            guint        old_status,
            guint        new_status,
            guint        reason,
            gchar       *dbus_error_name,
            GHashTable  *details,
            EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

    if (new_status != TP_CONNECTION_STATUS_CONNECTED)
        return;

    if (priv->tp_chat != NULL || account != priv->account ||
        priv->handle_type == TP_HANDLE_TYPE_NONE ||
        EMP_STR_EMPTY (priv->id))
        return;

    g_object_ref (chat);

    account_reconnected (chat, account);
}

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 void
set_chate_state_cb (GObject *source,
            GAsyncResult *result,
            gpointer user_data)
{
    GError *error = NULL;

    if (!tp_text_channel_set_chat_state_finish (TP_TEXT_CHANNEL (source), result,
        &error)) {
        DEBUG ("Failed to set chat state: %s", error->message);
        g_error_free (error);
    }
}

static void
set_chat_state (EmpathyChat *self,
        TpChannelChatState state)
{
    EmpathyChatPriv *priv = GET_PRIV (self);

    if (!tp_proxy_has_interface_by_id (priv->tp_chat,
        TP_IFACE_QUARK_CHANNEL_INTERFACE_CHAT_STATE))
        return;

    tp_text_channel_set_chat_state_async (TP_TEXT_CHANNEL (priv->tp_chat), state,
        set_chate_state_cb, self);
}

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

    priv = GET_PRIV (chat);

    priv->composing_stop_timeout_id = 0;
    set_chat_state (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 {
        set_chat_state (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)
{
    chat_composing_remove_timeout (chat);
    set_chat_state (chat, TP_CHANNEL_CHAT_STATE_ACTIVE);
}

static gint
chat_input_history_entry_cmp (InputHistoryEntry *entry,
                              const gchar *text)
{
    if (!tp_strdiff (entry->text, text)) {
        if (entry->modified_text != NULL) {
            /* Modified entry and single string cannot be equal. */
            return 1;
        }
        return 0;
    }
    return 1;
}

static InputHistoryEntry *
chat_input_history_entry_new_with_text (const gchar *text)
{
    InputHistoryEntry *entry;
    entry = g_slice_new0 (InputHistoryEntry);
    entry->text = g_strdup (text);

    return entry;
}

static void
chat_input_history_entry_free (InputHistoryEntry *entry)
{
    g_free (entry->text);
    g_free (entry->modified_text);
    g_slice_free (InputHistoryEntry, entry);
}

static void
chat_input_history_entry_revert (InputHistoryEntry *entry)
{
    g_free (entry->modified_text);
    entry->modified_text = NULL;
}

static void
chat_input_history_entry_update_text (InputHistoryEntry *entry,
                                      const gchar *text)
{
    gchar *old;

    if (!tp_strdiff (text, entry->text)) {
        g_free (entry->modified_text);
        entry->modified_text = NULL;
        return;
    }

    old = entry->modified_text;
    entry->modified_text = g_strdup (text);
    g_free (old);
}

static const gchar *
chat_input_history_entry_get_text (InputHistoryEntry *entry)
{
    if (entry == NULL) {
        return NULL;
    }

    if (entry->modified_text != NULL) {
        return entry->modified_text;
    }
    return entry->text;
}

static GList *
chat_input_history_remove_item (GList *list,
                                GList *item)
{
    list = g_list_remove_link (list, item);
    chat_input_history_entry_free (item->data);
    g_list_free_1 (item);
    return list;
}

static void
chat_input_history_revert (EmpathyChat *chat)
{
    EmpathyChatPriv   *priv;
    GList             *list;
    GList             *item1;
    GList             *item2;
    InputHistoryEntry *entry;

    priv = GET_PRIV (chat);
    list = priv->input_history;

    if (list == NULL) {
        DEBUG ("No input history");
        return;
    }

    /* Delete temporary entry */
    if (priv->input_history_current != NULL) {
        item1 = list;
        list = chat_input_history_remove_item (list, item1);
        if (priv->input_history_current == item1) {
            /* Removed temporary entry was current entry */
            priv->input_history = list;
            priv->input_history_current = NULL;
            return;
        }
    }
    else {
        /* There is no entry to revert */
        return;
    }

    /* Restore the current history entry to original value */
    item1 = priv->input_history_current;
    entry = item1->data;
    chat_input_history_entry_revert (entry);

    /* Remove restored entry if there is other occurance before this entry */
    item2 = g_list_find_custom (list, chat_input_history_entry_get_text (entry),
                                (GCompareFunc) chat_input_history_entry_cmp);
    if (item2 != item1) {
        list = chat_input_history_remove_item (list, item1);
    }
    else {
        /* Remove other occurance of the restored entry */
        item2 = g_list_find_custom (item1->next,
                                    chat_input_history_entry_get_text (entry),
                                    (GCompareFunc) chat_input_history_entry_cmp);
        if (item2 != NULL) {
            list = chat_input_history_remove_item (list, item2);
        }
    }

    priv->input_history_current = NULL;
    priv->input_history = list;
}

static void
chat_input_history_add (EmpathyChat  *chat,
                        const gchar *str,
                        gboolean temporary)
{
    EmpathyChatPriv   *priv;
    GList             *list;
    GList             *item;
    InputHistoryEntry *entry;

    priv = GET_PRIV (chat);

    list = priv->input_history;

    /* Remove any other occurances of this entry, if not temporary */
    if (!temporary) {
        while ((item = g_list_find_custom (list, str,
            (GCompareFunc) chat_input_history_entry_cmp)) != NULL) {
            list = chat_input_history_remove_item (list, item);
        }

        /* Trim the list to the last 10 items */
        while (g_list_length (list) > 10) {
            item = g_list_last (list);
            if (item != NULL) {
                list = chat_input_history_remove_item (list, item);
            }
        }
    }



    /* Add new entry */
    entry = chat_input_history_entry_new_with_text (str);
    list = g_list_prepend (list, entry);

    /* Set the list and the current item pointer */
    priv->input_history = list;
    if (temporary) {
        priv->input_history_current = list;
    }
    else {
        priv->input_history_current = NULL;
    }
}

static const gchar *
chat_input_history_get_next (EmpathyChat *chat)
{
    EmpathyChatPriv *priv;
    GList           *item;
    const gchar     *msg;

    priv = GET_PRIV (chat);

    if (priv->input_history == NULL) {
        DEBUG ("No input history, next entry is NULL");
        return NULL;
    }
    g_assert (priv->input_history_current != NULL);

    if ((item = g_list_next (priv->input_history_current)) == NULL)
    {
        item = priv->input_history_current;
    }

    msg = chat_input_history_entry_get_text (item->data);

    DEBUG ("Returning next entry: '%s'", msg);

    priv->input_history_current = item;

    return msg;
}

static const gchar *
chat_input_history_get_prev (EmpathyChat *chat)
{
    EmpathyChatPriv *priv;
    GList           *item;
    const gchar     *msg;

    g_return_val_if_fail (EMPATHY_IS_CHAT (chat), NULL);

    priv = GET_PRIV (chat);

    if (priv->input_history == NULL) {
        DEBUG ("No input history, previous entry is NULL");
        return NULL;
    }

    if (priv->input_history_current == NULL)
    {
        return NULL;
    }
    else if ((item = g_list_previous (priv->input_history_current)) == NULL)
    {
        item = priv->input_history_current;
    }

    msg = chat_input_history_entry_get_text (item->data);

    DEBUG ("Returning previous entry: '%s'", msg);

    priv->input_history_current = item;

    return msg;
}

static void
chat_input_history_update (EmpathyChat *chat,
                           GtkTextBuffer *buffer)
{
    EmpathyChatPriv      *priv;
    GtkTextIter           start, end;
    gchar                *text;
    InputHistoryEntry    *entry;

    priv = GET_PRIV (chat);

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

    if (priv->input_history_current == NULL) {
        /* Add the current text temporarily to the history */
        chat_input_history_add (chat, text, TRUE);
        g_free (text);
        return;
    }

    /* Save the changes in the history */
    entry = priv->input_history_current->data;
    if (tp_strdiff (chat_input_history_entry_get_text (entry), text)) {
        chat_input_history_entry_update_text (entry, text);
    }

    g_free (text);
}

typedef struct {
    EmpathyChat *chat;
    gchar *message;
} ChatCommandMsgData;

static void
chat_command_msg_cb (GObject *source,
                  GAsyncResult *result,
                  gpointer                  user_data)
{
    ChatCommandMsgData *data = user_data;
    GError *error = NULL;
    TpChannel *channel;

    channel = tp_account_channel_request_ensure_and_observe_channel_finish (
                    TP_ACCOUNT_CHANNEL_REQUEST (source), result, &error);

    if (channel == NULL) {
        DEBUG ("Failed to get channel: %s", error->message);
        g_error_free (error);

        empathy_chat_view_append_event (data->chat->view,
            _("Failed to open private chat"));
        goto OUT;
    }

    if (!EMP_STR_EMPTY (data->message) && TP_IS_TEXT_CHANNEL (channel)) {
        TpTextChannel *text = (TpTextChannel *) channel;
        TpMessage *msg;

        msg = tp_client_message_new_text (TP_CHANNEL_TEXT_MESSAGE_TYPE_NORMAL,
            data->message);

        tp_text_channel_send_message_async (text, msg, 0, NULL, NULL);

        g_object_unref (msg);
    }

    g_object_unref (channel);

OUT:
    g_free (data->message);
    g_slice_free (ChatCommandMsgData, data);
}

static gboolean
nick_command_supported (EmpathyChat *chat)
{
    EmpathyChatPriv * priv = GET_PRIV (chat);
    TpConnection    *connection;

    connection = tp_channel_borrow_connection (TP_CHANNEL (priv->tp_chat));
    return tp_proxy_has_interface_by_id (connection,
        EMP_IFACE_QUARK_CONNECTION_INTERFACE_RENAMING);
}

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

    return tp_proxy_has_interface_by_id (priv->tp_chat,
            TP_IFACE_QUARK_CHANNEL_INTERFACE_GROUP);
}

static void
chat_command_clear (EmpathyChat *chat,
            GStrv        strv)
{
    empathy_chat_view_clear (chat->view);
}

static void
chat_command_topic (EmpathyChat *chat,
            GStrv        strv)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    EmpathyTpChatProperty *property;
    GValue value = {0, };

    property = empathy_tp_chat_get_property (priv->tp_chat, "subject");
    if (property == NULL) {
        empathy_chat_view_append_event (chat->view,
            _("Topic not supported on this conversation"));
        return;
    }

    if (!(property->flags & TP_PROPERTY_FLAG_WRITE)) {
        empathy_chat_view_append_event (chat->view,
            _("You are not allowed to change the topic"));
        return;
    }

    g_value_init (&value, G_TYPE_STRING);
    g_value_set_string (&value, strv[1]);
    empathy_tp_chat_set_property (priv->tp_chat, "subject", &value);
    g_value_unset (&value);
}

void
empathy_chat_join_muc (EmpathyChat *chat,
           const gchar   *room)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

    empathy_join_muc (priv->account, room,
        empathy_get_current_action_time ());
}

static void
chat_command_join (EmpathyChat *chat,
           GStrv        strv)
{
    guint i = 0;

    GStrv rooms = g_strsplit_set (strv[1], ", ", -1);

    /* FIXME: Ideally we should ask to handle ourself the channel so we can
    * report the error if any but this is blocked by
    * https://bugs.freedesktop.org/show_bug.cgi?id=13422 */
    while (rooms[i] != NULL) {
        /* ignore empty strings */
        if (!EMP_STR_EMPTY (rooms[i])) {
            empathy_chat_join_muc (chat, rooms[i]);
        }
        i++;
    }
    g_strfreev (rooms);
}

static void
chat_command_part (EmpathyChat *chat,
               GStrv        strv)
{
    g_signal_emit (chat, signals[PART_COMMAND_ENTERED], 0, strv);
}

static void
chat_command_msg_internal (EmpathyChat *chat,
               const gchar *contact_id,
               const gchar *message)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    ChatCommandMsgData *data;
    TpAccountChannelRequest *req;
    GHashTable *request;

    request = tp_asv_new (
        TP_PROP_CHANNEL_CHANNEL_TYPE, G_TYPE_STRING, TP_IFACE_CHANNEL_TYPE_TEXT,
        TP_PROP_CHANNEL_TARGET_HANDLE_TYPE, G_TYPE_UINT, TP_HANDLE_TYPE_CONTACT,
        TP_PROP_CHANNEL_TARGET_ID, G_TYPE_STRING, contact_id,
        NULL);

    req = tp_account_channel_request_new (priv->account, request,
        empathy_get_current_action_time ());

    /* FIXME: We should probably search in members alias. But this
     * is enough for IRC */
    data = g_slice_new (ChatCommandMsgData);
    data->chat = chat;
    data->message = g_strdup (message);

    tp_account_channel_request_ensure_and_observe_channel_async (req,
        EMPATHY_CHAT_BUS_NAME, NULL, chat_command_msg_cb, data);

    g_object_unref (req);
    g_hash_table_unref (request);
}

static void
chat_command_query (EmpathyChat *chat,
            GStrv        strv)
{
    /* If <message> part is not defined,
     * strv[2] will be the terminal NULL */
    chat_command_msg_internal (chat, strv[1], strv[2]);
}

static void
chat_command_msg (EmpathyChat *chat,
          GStrv        strv)
{
    chat_command_msg_internal (chat, strv[1], strv[2]);
}

static void
callback_for_request_rename (TpProxy *proxy,
          const GError *error,
          gpointer user_data,
          GObject *weak_object)
{
    if (error != NULL) {
        DEBUG ("Call to RequestRename method failed: %s",error->message);
    }
}

static void
chat_command_nick (EmpathyChat *chat,
           GStrv        strv)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    TpProxy *proxy;

    proxy = TP_PROXY (tp_account_get_connection (priv->account));

    emp_cli_connection_interface_renaming_call_request_rename (proxy, -1,
        strv[1], callback_for_request_rename, NULL, NULL, NULL);
}

static void
chat_command_me (EmpathyChat *chat,
          GStrv        strv)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    TpMessage *message;
    TpTextChannel *channel;

    channel = (TpTextChannel *) (priv->tp_chat);

    if (!tp_text_channel_supports_message_type (channel,
            TP_CHANNEL_TEXT_MESSAGE_TYPE_ACTION)) {
        /* Action message are not supported, 'simulate' the action */
        EmpathyContact *self_contact;
        gchar *tmp;

        self_contact = empathy_tp_chat_get_self_contact (priv->tp_chat);
        /* The TpChat can't be ready if it doesn't have the self contact */
        g_assert (self_contact != NULL);

        tmp = g_strdup_printf ("%s %s", empathy_contact_get_alias (self_contact),
            strv[1]);
        message = tp_client_message_new_text (TP_CHANNEL_TEXT_MESSAGE_TYPE_NORMAL,
            tmp);
        g_free (tmp);
    }
    else {
        message = tp_client_message_new_text (TP_CHANNEL_TEXT_MESSAGE_TYPE_ACTION,
            strv[1]);
    }

    empathy_tp_chat_send (priv->tp_chat, message);
    g_object_unref (message);
}

static void
chat_command_say (EmpathyChat *chat,
          GStrv        strv)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    TpMessage *message;

    message = tp_client_message_new_text (TP_CHANNEL_TEXT_MESSAGE_TYPE_NORMAL,
        strv[1]);
    empathy_tp_chat_send (priv->tp_chat, message);
    g_object_unref (message);
}

static void
whois_got_contact_cb (TpConnection *connection,
              guint n_contacts,
              TpContact * const *contacts,
              const gchar * const *requested_ids,
              GHashTable *failed_id_errors,
              const GError *error,
              gpointer user_data,
              GObject *weak_object)
{
    EmpathyChat *chat = EMPATHY_CHAT (weak_object);

    g_return_if_fail (n_contacts <= 1);

    if (n_contacts == 0) {
        GHashTableIter iter;
        gpointer key = NULL, value = NULL;
        gchar *id;
        GError *id_error;

        /* tp-glib guarantees that the contacts you requested will be
         * in failed_id_errors regardless of whether the individual
         * contact was invalid or the whole operation failed.
         */
        g_hash_table_iter_init (&iter, failed_id_errors);
        g_hash_table_iter_next (&iter, &key, &value);
        id = key;
        id_error = value;

        DEBUG ("Error getting TpContact for '%s': %s %u %s",
            id, g_quark_to_string (id_error->domain),
            id_error->code, id_error->message);

        if (error == NULL) {
            /* The specific ID failed. */
            gchar *event = g_strdup_printf (
                _("“%s” is not a valid contact ID"), id);
            empathy_chat_view_append_event (chat->view, event);
            g_free (event);
        }
        /* Otherwise we're disconnected or something; so the window
         * will already say ‘Disconnected’, so let's not show anything.
         */
    } else {
        EmpathyContact *empathy_contact;
        GtkWidget *window;

        g_return_if_fail (contacts[0] != NULL);
        empathy_contact = empathy_contact_dup_from_tp_contact (
            contacts[0]);

        window = gtk_widget_get_toplevel (GTK_WIDGET (chat));
        /* If we're alive and this command is running, we'd better be
         * in a window. */
        g_return_if_fail (window != NULL);
        g_return_if_fail (gtk_widget_is_toplevel (window));
        empathy_contact_information_dialog_show (empathy_contact,
            GTK_WINDOW (window));
        g_object_unref (empathy_contact);
    }
}

static void
chat_command_whois (EmpathyChat *chat,
            GStrv strv)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    TpConnection *conn;

    conn = tp_channel_borrow_connection ((TpChannel *) priv->tp_chat);
    tp_connection_get_contacts_by_id (conn,
        /* Element 0 of 'strv' is "whois"; element 1 is the contact ID
         * entered by the user (including spaces, if any). */
        1, (const gchar * const *) strv + 1,
        0, NULL,
        whois_got_contact_cb, NULL, NULL, G_OBJECT (chat));
}

static void chat_command_help (EmpathyChat *chat, GStrv strv);

typedef void (*ChatCommandFunc) (EmpathyChat *chat, GStrv strv);

typedef struct {
    const gchar *prefix;
    guint min_parts;
    guint max_parts;
    ChatCommandFunc func;
    gboolean (*is_supported)(EmpathyChat *chat);
    const gchar *help;
} ChatCommandItem;

static ChatCommandItem commands[] = {
    {"clear", 1, 1, chat_command_clear, NULL,
     N_("/clear: clear all messages from the current conversation")},

    {"topic", 2, 2, chat_command_topic, NULL,
     N_("/topic <topic>: set the topic of the current conversation")},

    {"join", 2, 2, chat_command_join, NULL,
     N_("/join <chat room ID>: join a new chat room")},

    {"j", 2, 2, chat_command_join, NULL,
     N_("/j <chat room ID>: join a new chat room")},

    /* FIXME: https://bugzilla.gnome.org/show_bug.cgi?id=643295 */
    {"part", 1, 3, chat_command_part, part_command_supported,
     N_("/part [<chat room ID>] [<reason>]: leave the chat room, "
        "by default the current one")},

    {"query", 2, 3, chat_command_query, NULL,
     N_("/query <contact ID> [<message>]: open a private chat")},

    {"msg", 3, 3, chat_command_msg, NULL,
     N_("/msg <contact ID> <message>: open a private chat")},

    {"nick", 2, 2, chat_command_nick, nick_command_supported,
     N_("/nick <nickname>: change your nickname on the current server")},

    {"me", 2, 2, chat_command_me, NULL,
     N_("/me <message>: send an ACTION message to the current conversation")},

    {"say", 2, 2, chat_command_say, NULL,
     N_("/say <message>: send <message> to the current conversation. "
        "This is used to send a message starting with a '/'. For example: "
        "\"/say /join is used to join a new chat room\"")},

    {"whois", 2, 2, chat_command_whois, NULL,
     N_("/whois <contact ID>: display information about a contact")},

    {"help", 1, 2, chat_command_help, NULL,
     N_("/help [<command>]: show all supported commands. "
        "If <command> is defined, show its usage.")},
};

static void
chat_command_show_help (EmpathyChat     *chat,
            ChatCommandItem *item)
{
    gchar *str;

    str = g_strdup_printf (_("Usage: %s"), _(item->help));
    empathy_chat_view_append_event (chat->view, str);
    g_free (str);
}

static void
chat_command_help (EmpathyChat *chat,
           GStrv        strv)
{
    guint i;

    /* If <command> part is not defined,
     * strv[1] will be the terminal NULL */
    if (strv[1] == NULL) {
        for (i = 0; i < G_N_ELEMENTS (commands); i++) {
            if (commands[i].is_supported != NULL) {
                if (!commands[i].is_supported (chat)) {
                    continue;
                }
            }
            empathy_chat_view_append_event (chat->view,
                _(commands[i].help));
        }
        return;
    }

    for (i = 0; i < G_N_ELEMENTS (commands); i++) {
        if (g_ascii_strcasecmp (strv[1], commands[i].prefix) == 0) {
            if (commands[i].is_supported != NULL) {
                if (!commands[i].is_supported (chat)) {
                    break;
                }
            }
            chat_command_show_help (chat, &commands[i]);
            return;
        }
    }

    empathy_chat_view_append_event (chat->view,
        _("Unknown command"));
}

static GStrv
chat_command_parse (const gchar *text, guint max_parts)
{
    GPtrArray *array;
    gchar *item;

    DEBUG ("Parse command, parts=%d text=\"%s\":", max_parts, text);

    array = g_ptr_array_sized_new (max_parts + 1);
    while (max_parts > 1) {
        const gchar *end;

        /* Skip white spaces */
        while (g_ascii_isspace (*text)) {
            text++;
        }

        /* Search the end of this part, until first space. */
        for (end = text; *end != '\0' && !g_ascii_isspace (*end); end++)
            /* Do nothing */;
        if (*end == '\0') {
            break;
        }

        item = g_strndup (text, end - text);
        g_ptr_array_add (array, item);
        DEBUG ("\tITEM: \"%s\"", item);

        text = end;
        max_parts--;
    }

    /* Append last part if not empty */
    item = g_strstrip (g_strdup (text));
    if (!EMP_STR_EMPTY (item)) {
        g_ptr_array_add (array, item);
        DEBUG ("\tITEM: \"%s\"", item);
    } else {
        g_free (item);
    }

    /* Make the array NULL-terminated */
    g_ptr_array_add (array, NULL);

    return (GStrv) g_ptr_array_free (array, FALSE);
}

static gboolean
has_prefix_case (const gchar *s,
          const gchar *prefix)
{
    return g_ascii_strncasecmp (s, prefix, strlen (prefix)) == 0;
}

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

    if (EMP_STR_EMPTY (msg)) {
        return;
    }

    priv = GET_PRIV (chat);

    chat_input_history_add (chat, msg, FALSE);

    if (msg[0] == '/') {
        gboolean second_slash = FALSE;
        const gchar *iter = msg + 1;

        for (i = 0; i < G_N_ELEMENTS (commands); i++) {
            GStrv strv;
            guint strv_len;
            gchar c;

            if (!has_prefix_case (msg + 1, commands[i].prefix)) {
                continue;
            }
            c = *(msg + 1 + strlen (commands[i].prefix));
            if (c != '\0' && !g_ascii_isspace (c)) {
                continue;
            }
            if (commands[i].is_supported != NULL) {
                if (!commands[i].is_supported (chat)) {
                    continue;
                }
            }

            /* We can't use g_strsplit here because it does
             * not deal correctly if we have more than one space
             * between args */
            strv = chat_command_parse (msg + 1, commands[i].max_parts);

            strv_len = g_strv_length (strv);
            if (strv_len < commands[i].min_parts ||
                strv_len > commands[i].max_parts) {
                chat_command_show_help (chat, &commands[i]);
                g_strfreev (strv);
                return;
            }

            commands[i].func (chat, strv);
            g_strfreev (strv);
            return;
        }

        /* Also allow messages with two slashes before the
         * first space, so it is possible to send a /unix/path.
         * This heuristic is kind of crap. */
        while (*iter != '\0' && !g_ascii_isspace (*iter)) {
            if (*iter == '/') {
                second_slash = TRUE;
                break;
            }
            iter++;
        }

        if (!second_slash) {
            empathy_chat_view_append_event (chat->view,
                _("Unknown command; see /help for the available"
                  " commands"));
            return;
        }
    }

    message = tp_client_message_new_text (TP_CHANNEL_TEXT_MESSAGE_TYPE_NORMAL,
        msg);
    empathy_tp_chat_send (priv->tp_chat, message);
    g_object_unref (message);
}

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

    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);
    /* delete input history modifications */
    chat_input_history_revert (chat);

    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,
    gboolean pending)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    EmpathyContact  *sender;

    sender = empathy_message_get_sender (message);

    DEBUG ("Appending new message from %s (%d)",
        empathy_contact_get_alias (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);

    if (empathy_message_is_incoming (message)) {
        priv->unread_messages++;
        g_object_notify (G_OBJECT (chat), "nb-unread-messages");
    }

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

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

static void
chat_message_acknowledged_cb (EmpathyTpChat  *tp_chat,
                  EmpathyMessage *message,
                  EmpathyChat    *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

    empathy_chat_view_message_acknowledged (chat->view,
        message);

    priv->unread_messages--;
    g_object_notify (G_OBJECT (chat), "nb-unread-messages");
}

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

    if (!tp_strdiff (dbus_error, TP_ERROR_STR_INSUFFICIENT_BALANCE)) {
        /* translators: error used when user doesn't have enough credit on his
         * account to send the message. */
        error = _("insufficient balance to send message");
    } else if (!tp_strdiff (dbus_error, TP_ERROR_STR_NOT_CAPABLE)) {
        error = _("not capable");
    }

    if (error == NULL) {
        /* if we didn't find a dbus-error, try the old error */
        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;
        case TP_CHANNEL_TEXT_SEND_ERROR_UNKNOWN:
        default:
            error = _("unknown");
            break;
        }
    }

    if (message_body != NULL) {
            str = g_strdup_printf (_("Error sending message '%s': %s"),
                message_body, error);
    }
    else {
            str = g_strdup_printf (_("Error sending message: %s"), error);
    }

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

static void
chat_topic_label_size_allocate_cb (GtkLabel *label,
                   GtkAllocation *allocation,
                   EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

    if (!gtk_label_get_line_wrap (label)) {
        if (pango_layout_is_ellipsized (gtk_label_get_layout (label)))
            gtk_widget_show (priv->expander_topic);
        else
            gtk_widget_hide (priv->expander_topic);

        return;
    }
}

static void
chat_topic_expander_activate_cb (GtkExpander *expander,
                 GParamSpec *param_spec,
                 EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

    if (gtk_expander_get_expanded (expander)) {
        gtk_label_set_ellipsize (GTK_LABEL (priv->label_topic), PANGO_ELLIPSIZE_NONE);
        gtk_label_set_line_wrap (GTK_LABEL (priv->label_topic), TRUE);
    } else {
        gtk_label_set_ellipsize (GTK_LABEL (priv->label_topic), PANGO_ELLIPSIZE_END);
        gtk_label_set_line_wrap (GTK_LABEL (priv->label_topic), FALSE);
    }
}

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 {
            gchar *markup_topic;
            gchar *markup_text;

            markup_topic = empathy_add_link_markup (priv->subject);
            markup_text = g_strdup_printf ("<span weight=\"bold\">%s</span> %s",
                _("Topic:"), markup_topic);

            gtk_label_set_markup (GTK_LABEL (priv->label_topic), markup_text);
            g_free (markup_text);
            g_free (markup_topic);

            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 gboolean
chat_input_text_get_word_from_iter (GtkTextIter   *iter,
                                    GtkTextIter   *start,
                                    GtkTextIter   *end)
{
    GtkTextIter word_start = *iter;
    GtkTextIter word_end = *iter;
    GtkTextIter tmp;

    if (gtk_text_iter_inside_word (&word_end) &&
            !gtk_text_iter_ends_word (&word_end)) {
        gtk_text_iter_forward_word_end (&word_end);
    }

    tmp = word_end;

    if (gtk_text_iter_get_char (&tmp) == '\'') {
        gtk_text_iter_forward_char (&tmp);

        if (g_unichar_isalpha (gtk_text_iter_get_char (&tmp))) {
            gtk_text_iter_forward_word_end (&word_end);
        }
    }


    if (gtk_text_iter_inside_word (&word_start) ||
            gtk_text_iter_ends_word (&word_start)) {
        if (!gtk_text_iter_starts_word (&word_start) ||
                gtk_text_iter_equal (&word_start, &word_end)) {
            gtk_text_iter_backward_word_start (&word_start);
        }

        tmp = word_start;
        gtk_text_iter_backward_char (&tmp);

        if (gtk_text_iter_get_char (&tmp) == '\'') {
            gtk_text_iter_backward_char (&tmp);

            if (g_unichar_isalpha (gtk_text_iter_get_char (&tmp))) {
                gtk_text_iter_backward_word_start (&word_start);
            }
        }
    }

    *start = word_start;
    *end = word_end;
    return TRUE;
}

static void
chat_input_text_buffer_insert_text_cb (GtkTextBuffer *buffer,
                                       GtkTextIter   *location,
                                       gchar         *text,
                                       gint           len,
                                       EmpathyChat   *chat)
{
    GtkTextIter iter, pos;

    /* Remove all misspelled tags in the inserted text.
     * This happens when text is inserted within a misspelled word. */
    gtk_text_buffer_get_iter_at_offset (buffer, &iter,
                        gtk_text_iter_get_offset (location) - len);
    gtk_text_buffer_remove_tag_by_name (buffer, "misspelled",
                        &iter, location);

    gtk_text_buffer_get_iter_at_mark (buffer, &pos, gtk_text_buffer_get_insert (buffer));

    do {
        GtkTextIter start, end;
        gchar *str;

        if (!chat_input_text_get_word_from_iter (&iter, &start, &end))
            continue;

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

        if (gtk_text_iter_in_range (&pos, &start, &end) ||
                gtk_text_iter_equal (&pos, &end) ||
                empathy_spell_check (str)) {
            gtk_text_buffer_remove_tag_by_name (buffer, "misspelled", &start, &end);
        } else {
            gtk_text_buffer_apply_tag_by_name (buffer, "misspelled", &start, &end);
        }

        g_free (str);

    } while (gtk_text_iter_forward_word_end (&iter) &&
         gtk_text_iter_compare (&iter, location) <= 0);
}

static void
chat_input_text_buffer_delete_range_cb (GtkTextBuffer *buffer,
                                        GtkTextIter   *start,
                                        GtkTextIter   *end,
                                        EmpathyChat   *chat)
{
    GtkTextIter word_start, word_end;

    if (chat_input_text_get_word_from_iter (start, &word_start, &word_end)) {
        gtk_text_buffer_remove_tag_by_name (buffer, "misspelled",
                            &word_start, &word_end);
    }
}

static void
chat_input_text_buffer_changed_cb (GtkTextBuffer *buffer,
                                   EmpathyChat    *chat)
{
    if (gtk_text_buffer_get_char_count (buffer) == 0) {
        chat_composing_stop (chat);
    } else {
        chat_composing_start (chat);
    }
}

static void
chat_input_text_buffer_notify_cursor_position_cb (GtkTextBuffer *buffer,
                                                  GParamSpec    *pspec,
                                                  EmpathyChat    *chat)
{
    GtkTextIter pos;
    GtkTextIter prev_pos;
    GtkTextIter word_start;
    GtkTextIter word_end;
    GtkTextMark *mark;
    gchar *str;

    mark = gtk_text_buffer_get_mark (buffer, "previous-cursor-position");

    gtk_text_buffer_get_iter_at_mark (buffer, &pos,
                      gtk_text_buffer_get_insert (buffer));
    gtk_text_buffer_get_iter_at_mark (buffer, &prev_pos, mark);

    if (!chat_input_text_get_word_from_iter (&prev_pos, &word_start, &word_end))
        goto out;

    if (!gtk_text_iter_in_range (&pos, &word_start, &word_end) &&
            !gtk_text_iter_equal (&pos, &word_end)) {
        str = gtk_text_buffer_get_text (buffer,
                    &word_start, &word_end, FALSE);

        if (!empathy_spell_check (str)) {
            gtk_text_buffer_apply_tag_by_name (buffer,
                    "misspelled", &word_start, &word_end);
        } else {
            gtk_text_buffer_remove_tag_by_name (buffer,
                    "misspelled", &word_start, &word_end);
        }

        g_free (str);
    }

out:
    gtk_text_buffer_move_mark (buffer, mark, &pos);
}

static gboolean
empathy_isspace_cb (gunichar c,
         gpointer data)
{
    return g_unichar_isspace (c);
}

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_KEY_Up ||
         event->keyval == GDK_KEY_Down)) {
        GtkTextBuffer *buffer;
        const gchar   *str;

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

        if (event->keyval == GDK_KEY_Up) {
            str = chat_input_history_get_next (chat);
        } else {
            str = chat_input_history_get_prev (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_text_view_im_context_filter_keypress (view, event)) {
            gtk_text_view_reset_im_context (view);
            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_KEY_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_KEY_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->keyval == GDK_KEY_Escape) {
        empathy_search_bar_hide (EMPATHY_SEARCH_BAR (priv->search_bar));
    }
    if (!(event->state & (GDK_CONTROL_MASK | GDK_SHIFT_MASK)) &&
        event->keyval == GDK_KEY_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));
        if (gtk_text_iter_backward_find_char (&start, &empathy_isspace_cb, NULL, NULL)) {
            gtk_text_iter_set_offset (&start, gtk_text_iter_get_offset (&start) + 1);
        }
        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;
            GString     *message = NULL;
            GList       *l;

            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_alias (completed_list->data);
            } else {
                text = completed;

                /* Print all hits to the scrollback view, so the
                 * user knows what possibilities he has.
                 * Fixes #599779
                 * */
                 message = g_string_new ("");
                 for (l = completed_list; l != NULL; l = l->next) {
                    g_string_append (message, empathy_contact_get_alias (l->data));
                    g_string_append (message, " - ");
                 }
                 empathy_chat_view_append_event (chat->view, message->str);
                 g_string_free (message, TRUE);
            }

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

            if (len == 1 && is_start_of_buffer) {
                gchar *complete_char;

                complete_char = g_settings_get_string (
                    priv->gsettings_chat,
                    EMPATHY_PREFS_CHAT_NICK_COMPLETION_CHAR);

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

static void
chat_input_has_focus_notify_cb (GtkWidget   *widget,
                GParamSpec  *pspec,
                EmpathyChat *chat)
{
    empathy_chat_view_focus_toggled (chat->view, gtk_widget_has_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_suggestions_menu (const gchar *code,
                      EmpathyChatSpell *chat_spell)
{
    GList     *suggestions, *l;
    GtkWidget *menu, *menu_item;

    suggestions = empathy_spell_get_suggestions (code, chat_spell->word);
    if (suggestions == NULL)
        return NULL;

    menu = gtk_menu_new ();
    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 GtkWidget *
chat_spelling_build_menu (EmpathyChatSpell *chat_spell)
{
    GtkWidget *menu, *submenu, *item;
    GList     *codes, *l;

    codes = empathy_spell_get_enabled_language_codes ();
    g_assert (codes != NULL);

    if (g_list_length (codes) > 1) {
        menu = gtk_menu_new ();

        for (l = codes; l; l = l->next) {
            const gchar *code, *name;

            code = l->data;
            name = empathy_spell_get_language_name (code);
            if (!name)
                continue;

            item = gtk_image_menu_item_new_with_label (name);

            submenu = chat_spelling_build_suggestions_menu (
                    code, chat_spell);
            if (submenu == NULL)
                gtk_widget_set_sensitive (item, FALSE);
            else
                gtk_menu_item_set_submenu (GTK_MENU_ITEM (item),
                               submenu);
            gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
        }
    } else {
        menu = chat_spelling_build_suggestions_menu (codes->data,
                                 chat_spell);
        if (menu == NULL) {
            menu = gtk_menu_new ();
            item = gtk_menu_item_new_with_label (_("(No Suggestions)"));
            gtk_widget_set_sensitive (item, FALSE);
            gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
        }
    }
    g_list_free (codes);

    gtk_widget_show_all (menu);

    return menu;
}

typedef struct {
    EmpathyChat  *chat;
    gchar        *word;
    gchar        *code;
} EmpathyChatWord;

static EmpathyChatWord *
chat_word_new (EmpathyChat  *chat,
        const gchar  *word,
        const gchar  *code)
{
    EmpathyChatWord *chat_word;

    chat_word = g_slice_new0 (EmpathyChatWord);

    chat_word->chat = g_object_ref (chat);
    chat_word->word = g_strdup (word);
    chat_word->code = g_strdup (code);

    return chat_word;
}

static void
chat_word_free (EmpathyChatWord *chat_word)
{
    g_object_unref (chat_word->chat);
    g_free (chat_word->word);
    g_free (chat_word->code);
    g_slice_free (EmpathyChatWord, chat_word);
}

static void
chat_add_to_dictionary_activate_cb (GtkMenuItem     *menu_item,
                    EmpathyChatWord *chat_word)
{
    EmpathyChatPriv *priv = GET_PRIV (chat_word->chat);

    empathy_spell_add_to_dictionary (chat_word->code,
                     chat_word->word);
    priv->update_misspelled_words_id =
        g_idle_add (update_misspelled_words, chat_word->chat);
}

static GtkWidget *
chat_spelling_build_add_to_dictionary_item (EmpathyChatSpell *chat_spell)
{
    GtkWidget       *menu, *item, *lang_item, *image;
    GList           *codes, *l;
    gchar           *label;
    const gchar     *code, *name;
    EmpathyChatWord *chat_word;

    codes = empathy_spell_get_enabled_language_codes ();
    g_assert (codes != NULL);
    if (g_list_length (codes) > 1) {
        /* translators: %s is the selected word */
        label = g_strdup_printf (_("Add '%s' to Dictionary"),
                    chat_spell->word);
        item = gtk_image_menu_item_new_with_mnemonic (label);
        g_free (label);
        image = gtk_image_new_from_icon_name (GTK_STOCK_ADD,
                              GTK_ICON_SIZE_MENU);
        gtk_image_menu_item_set_image (GTK_IMAGE_MENU_ITEM (item),
                           image);

        menu = gtk_menu_new ();

        for (l = codes; l; l = l->next) {
            code = l->data;
            name = empathy_spell_get_language_name (code);
            if (name == NULL)
                continue;

            lang_item = gtk_image_menu_item_new_with_label (name);

            chat_word= chat_word_new (chat_spell->chat,
                          chat_spell->word, code);
            g_object_set_data_full (G_OBJECT (lang_item),
                "chat-word", chat_word,
                (GDestroyNotify) chat_word_free);

            g_signal_connect (G_OBJECT (lang_item), "activate",
                G_CALLBACK (chat_add_to_dictionary_activate_cb),
                chat_word);
            gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), lang_item);
        }
        gtk_menu_item_set_submenu (GTK_MENU_ITEM (item), menu);
    } else {
        code = codes->data;
        name = empathy_spell_get_language_name (code);
        g_assert (name != NULL);
        /* translators: first %s is the selected word,
         * second %s is the language name of the target dictionary */
        label = g_strdup_printf (_("Add '%s' to %s Dictionary"),
                    chat_spell->word, name);
        item = gtk_image_menu_item_new_with_mnemonic (label);
        g_free (label);
        image = gtk_image_new_from_icon_name (GTK_STOCK_ADD,
                              GTK_ICON_SIZE_MENU);
        gtk_image_menu_item_set_image (GTK_IMAGE_MENU_ITEM (item), image);

        chat_word = chat_word_new (chat_spell->chat, chat_spell->word,
                       code);
        g_object_set_data_full (G_OBJECT (item), "chat-word", chat_word,
                    (GDestroyNotify) chat_word_free);

        g_signal_connect (G_OBJECT (item), "activate",
                  G_CALLBACK (chat_add_to_dictionary_activate_cb),
                  chat_word);
    }
    g_list_free (codes);

    gtk_widget_show_all (item);

    return item;
}

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)
{
    GtkTextBuffer        *buffer;
    GtkTextTagTable      *table;
    GtkTextTag           *tag;
    gint                  x, y;
    GtkTextIter           iter, start, end;
    GtkWidget            *item;
    gchar                *str = NULL;
    EmpathyChatSpell     *chat_spell;
    GtkWidget            *spell_menu;
    GtkWidget            *spell_item;
    EmpathySmileyManager *smiley_manager;
    GtkWidget            *smiley_menu;
    GtkWidget            *image;

    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);

        /* Spelling suggestions */
        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);


        spell_item = gtk_separator_menu_item_new ();
        gtk_menu_shell_append (GTK_MENU_SHELL (spell_menu), spell_item);
        gtk_widget_show (spell_item);

        /* Add to dictionary */
        spell_item = chat_spelling_build_add_to_dictionary_item (chat_spell);

        gtk_menu_shell_append (GTK_MENU_SHELL (spell_menu), spell_item);
        gtk_widget_show (spell_item);

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


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

    g_return_val_if_fail (TPL_IS_EVENT (event), FALSE);
    g_return_val_if_fail (EMPATHY_IS_CHAT (chat), FALSE);

    pending = empathy_tp_chat_get_pending_messages (priv->tp_chat);
    message = empathy_message_from_tpl_log_event (event);

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

    g_object_unref (message);
    return TRUE;
}


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

    g_return_if_fail (EMPATHY_IS_CHAT (chat));

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

    if (!priv->can_show_pending)
        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, TRUE);
    }
}


static void
got_filtered_messages_cb (GObject *manager,
        GAsyncResult *result,
        gpointer user_data)
{
    GList *l;
    GList *messages;
    EmpathyChat *chat = EMPATHY_CHAT (user_data);
    EmpathyChatPriv *priv = GET_PRIV (chat);
    GError *error = NULL;

    if (!tpl_log_manager_get_filtered_events_finish (TPL_LOG_MANAGER (manager),
        result, &messages, &error)) {
        DEBUG ("%s. Aborting.", error->message);
        empathy_chat_view_append_event (chat->view,
            _("Failed to retrieve recent logs"));
        g_error_free (error);
        goto out;
    }

    for (l = messages; l; l = g_list_next (l)) {
        EmpathyMessage *message;
        g_assert (TPL_IS_EVENT (l->data));

        message = empathy_message_from_tpl_log_event (l->data);
        g_object_unref (l->data);

        empathy_chat_view_append_message (chat->view, message);
        g_object_unref (message);
    }
    g_list_free (messages);

out:
    /* in case of TPL error, skip backlog and show pending messages */
    priv->can_show_pending = TRUE;
    show_pending_messages (chat);

    /* FIXME: See Bug#610994, we are forcing the ACK of the queue. See comments
     * about it in EmpathyChatPriv definition */
    priv->retrieving_backlogs = FALSE;
    empathy_chat_messages_read (chat);

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

static void
chat_add_logs (EmpathyChat *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    TplEntity       *target;

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

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

    /* Add messages from last conversation */
    if (priv->handle_type == TP_HANDLE_TYPE_ROOM)
      target = tpl_entity_new_from_room_id (priv->id);
    else
      target = tpl_entity_new (priv->id, TPL_ENTITY_CONTACT, NULL, NULL);

    priv->retrieving_backlogs = TRUE;
    tpl_log_manager_get_filtered_events_async (priv->log_manager,
                           priv->account,
                           target,
                           TPL_EVENT_MASK_TEXT,
                           5,
                           chat_log_filter,
                           chat,
                           got_filtered_messages_cb,
                           (gpointer) chat);

    g_object_unref (target);
}

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_alias (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_alias (contact);
    gchar *str;

    g_return_if_fail (TP_CHANNEL_GROUP_CHANGE_REASON_RENAMED != reason);

    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 void
chat_member_renamed_cb (EmpathyTpChat  *tp_chat,
             EmpathyContact *old_contact,
             EmpathyContact *new_contact,
             guint           reason,
             gchar          *message,
             EmpathyChat    *chat)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);

    g_return_if_fail (TP_CHANNEL_GROUP_CHANGE_REASON_RENAMED == reason);

    if (priv->block_events_timeout_id == 0) {
        gchar *str;

        str = g_strdup_printf (_("%s is now known as %s"),
                       empathy_contact_get_alias (old_contact),
                       empathy_contact_get_alias (new_contact));
        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,
             gboolean show)
{
    EmpathyChatPriv *priv = GET_PRIV (chat);
    GtkAllocation allocation;

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

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

    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 */
        gtk_widget_get_allocation (priv->vbox_left, &allocation);
        min_width = MIN (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));
        empathy_contact_list_store_set_show_groups (
                EMPATHY_CONTACT_LIST_STORE (store), FALSE);

        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, show);

    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;
    }

    g_free (priv->id);

    priv->id = g_strdup (empathy_tp_chat_get_id (priv->tp_chat));
    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;
    }
    else if (priv->tp_chat != NULL) {
        tp_channel_get_handle ((TpChannel *) priv->tp_chat, &priv->handle_type);
    }

    chat_update_contacts_visibility (chat, priv->show_contacts);

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

static void
chat_invalidated_cb (EmpathyTpChat *tp_chat,
         guint domain,
         gint code,
         gchar *message,
         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);

    chat_update_contacts_visibility (chat, FALSE);
}

static gboolean
update_misspelled_words (gpointer data)
{
    EmpathyChat *chat = EMPATHY_CHAT (data);
    EmpathyChatPriv *priv = GET_PRIV (chat);
    GtkTextBuffer *buffer;
    GtkTextIter iter;
    gint length;

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

    gtk_text_buffer_get_end_iter (buffer, &iter);
    length = gtk_text_iter_get_offset (&iter);
    chat_input_text_buffer_insert_text_cb (buffer, &iter,
                           NULL, length, chat);

    priv->update_misspelled_words_id = 0;

    return FALSE;
}

static void
conf_spell_checking_cb (GSettings *gsettings_chat,
            const gchar *key,
            gpointer user_data)
{
    EmpathyChat *chat = EMPATHY_CHAT (user_data);
    EmpathyChatPriv *priv = GET_PRIV (chat);
    gboolean spell_checker;
    GtkTextBuffer *buffer;

    if (strcmp (key, EMPATHY_PREFS_CHAT_SPELL_CHECKER_ENABLED) != 0)
        return;

    spell_checker = g_settings_get_boolean (gsettings_chat,
            EMPATHY_PREFS_CHAT_SPELL_CHECKER_ENABLED);

    if (!empathy_spell_supported ()) {
        spell_checker = FALSE;
    }

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

    if (spell_checker == priv->spell_checking_enabled) {
        if (spell_checker) {
            /* Possibly changed dictionaries,
             * update misspelled words. Need to do so in idle
             * so the spell checker is updated. */
            priv->update_misspelled_words_id =
                g_idle_add (update_misspelled_words, chat);
        }

        return;
    }

    if (spell_checker) {
        GtkTextIter iter;

        priv->notify_cursor_position_id = tp_g_signal_connect_object  (
                buffer, "notify::cursor-position",
                G_CALLBACK (chat_input_text_buffer_notify_cursor_position_cb),
                chat, 0);
        priv->insert_text_id = tp_g_signal_connect_object  (
                buffer, "insert-text",
                G_CALLBACK (chat_input_text_buffer_insert_text_cb),
                chat, G_CONNECT_AFTER);
        priv->delete_range_id = tp_g_signal_connect_object  (
                buffer, "delete-range",
                G_CALLBACK (chat_input_text_buffer_delete_range_cb),
                chat, G_CONNECT_AFTER);

        gtk_text_buffer_create_tag (buffer, "misspelled",
                        "underline", PANGO_UNDERLINE_ERROR,
                        NULL);

        gtk_text_buffer_get_iter_at_mark (buffer, &iter,
                                              gtk_text_buffer_get_insert (buffer));
        gtk_text_buffer_create_mark (buffer, "previous-cursor-position",
                         &iter, TRUE);

        /* Mark misspelled words in the existing buffer.
         * Need to do so in idle so the spell checker is updated. */
        priv->update_misspelled_words_id =
            g_idle_add (update_misspelled_words, chat);
    } else {
        GtkTextTagTable *table;
        GtkTextTag *tag;

        g_signal_handler_disconnect (buffer, priv->notify_cursor_position_id);
        priv->notify_cursor_position_id = 0;
        g_signal_handler_disconnect (buffer, priv->insert_text_id);
        priv->insert_text_id = 0;
        g_signal_handler_disconnect (buffer, priv->delete_range_id);
        priv->delete_range_id = 0;

        table = gtk_text_buffer_get_tag_table (buffer);
        tag = gtk_text_tag_table_lookup (table, "misspelled");
        gtk_text_tag_table_remove (table, tag);

        gtk_text_buffer_delete_mark_by_name (buffer,
                             "previous-cursor-position");
    }

    priv->spell_checking_enabled = spell_checker;
}

static gboolean
save_paned_pos_timeout (gpointer data)
{
    EmpathyChat *self = data;
    gint hpaned_pos;

    hpaned_pos = gtk_paned_get_position (GTK_PANED (self->priv->hpaned));

    g_settings_set_int (self->priv->gsettings_ui,
                EMPATHY_PREFS_UI_CHAT_WINDOW_PANED_POS,
                hpaned_pos);

    return FALSE;
}

static gboolean
chat_hpaned_pos_changed_cb (GtkWidget* hpaned,
        GParamSpec *spec,
        gpointer user_data)
{
    EmpathyChat *chat = EMPATHY_CHAT (user_data);

    if (chat->priv->save_paned_pos_id != 0)
        g_source_remove (chat->priv->save_paned_pos_id);

    chat->priv->save_paned_pos_id = g_timeout_add_seconds (1,
        save_paned_pos_timeout, chat);

    return TRUE;
}

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

    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,
                    "expander_topic", &priv->expander_topic,
                    "label_topic", &priv->label_topic,
                    "scrolled_window_contacts", &priv->scrolled_window_contacts,
                    "info_bar_vbox", &priv->info_bar_vbox,
                    NULL);

    empathy_builder_connect (gui, chat,
        "expander_topic", "notify::expanded", chat_topic_expander_activate_cb,
        "label_topic", "size-allocate", chat_topic_label_size_allocate_cb,
        NULL);

    g_free (filename);

    /* Add message view. */
    theme_mgr = empathy_theme_manager_dup_singleton ();
    chat->view = empathy_theme_manager_create_view (theme_mgr);
    g_object_unref (theme_mgr);
    /* If this is a GtkTextView, it's set as a drag destination for text/plain
       and other types, even though it's non-editable and doesn't accept any
       drags.  This steals drag motion for anything inside the scrollbars,
       making drag destinations on chat windows far less useful.
     */
    gtk_drag_dest_unset (GTK_WIDGET (chat->view));
    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 = empathy_input_text_view_new ();
    g_signal_connect (chat->input_text_view, "notify::has-focus",
              G_CALLBACK (chat_input_has_focus_notify_cb),
              chat);
    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, "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));
    tp_g_signal_connect_object  (buffer, "changed",
              G_CALLBACK (chat_input_text_buffer_changed_cb),
              chat, 0);
    tp_g_signal_connect_object (priv->gsettings_chat,
            "changed::" EMPATHY_PREFS_CHAT_SPELL_CHECKER_ENABLED,
            G_CALLBACK (conf_spell_checking_cb), chat, 0);
    conf_spell_checking_cb (priv->gsettings_chat,
                EMPATHY_PREFS_CHAT_SPELL_CHECKER_ENABLED, chat);
    gtk_container_add (GTK_CONTAINER (priv->scrolled_window_input),
               chat->input_text_view);
    gtk_widget_show (chat->input_text_view);

    /* Add the (invisible) search bar */
    priv->search_bar = empathy_search_bar_new (chat->view);
    gtk_box_pack_start (GTK_BOX(priv->vbox_left),
                        priv->search_bar,
                        FALSE, FALSE, 0);
    gtk_box_reorder_child (GTK_BOX(priv->vbox_left), priv->search_bar, 1);

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

    g_signal_connect (priv->hpaned, "notify::position",
              G_CALLBACK (chat_hpaned_pos_changed_cb),
              chat);

        /* Load the paned position */
    paned_pos = g_settings_get_int (priv->gsettings_ui,
            EMPATHY_PREFS_UI_CHAT_WINDOW_PANED_POS);
    if (paned_pos != 0)
        gtk_paned_set_position (GTK_PANED(priv->hpaned), paned_pos);

    /* Set widget focus order */
    list = g_list_append (NULL, priv->search_bar);
    list = g_list_append (list, 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_allocate (GtkWidget     *widget,
            GtkAllocation *allocation)
{
  GtkBin *bin = GTK_BIN (widget);
  GtkAllocation child_allocation;
  GtkWidget *child;

  gtk_widget_set_allocation (widget, allocation);

  child = gtk_bin_get_child (bin);

  if (child && gtk_widget_get_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);

    if (priv->update_misspelled_words_id != 0)
        g_source_remove (priv->update_misspelled_words_id);

    if (priv->save_paned_pos_id != 0)
        g_source_remove (priv->save_paned_pos_id);

    g_object_unref (priv->gsettings_chat);
    g_object_unref (priv->gsettings_ui);

    g_list_foreach (priv->input_history, (GFunc) chat_input_history_entry_free, NULL);
    g_list_free (priv->input_history);

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

    chat_composing_remove_timeout (chat);

    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_invalidated_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_message_acknowledged_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_leave (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);
    EmpathyChatPriv *priv = GET_PRIV (chat);

    if (priv->handle_type != TP_HANDLE_TYPE_ROOM) {
        /* First display logs from the logger and then display pending messages */
        chat_add_logs (chat);
    }
     else {
        /* Just display pending messages for rooms */
        priv->can_show_pending = TRUE;
        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_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",
                                  TP_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));

    g_object_class_install_property (object_class,
                     PROP_SMS_CHANNEL,
                     g_param_spec_boolean ("sms-channel",
                                   "SMS Channel",
                                   "TRUE if this channel is for sending SMSes",
                                   FALSE,
                                   G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (object_class,
                     PROP_N_MESSAGES_SENDING,
                     g_param_spec_uint ("n-messages-sending",
                                "Num Messages Sending",
                                "The number of messages being sent",
                                0, G_MAXUINT, 0,
                                G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));

    g_object_class_install_property (object_class,
                     PROP_NB_UNREAD_MESSAGES,
                     g_param_spec_uint ("nb-unread-messages",
                                "Num Unread Messages",
                                "The number of unread messages",
                                0, G_MAXUINT, 0,
                                G_PARAM_READABLE | 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,
                  _empathy_gtk_marshal_VOID__OBJECT_BOOLEAN,
                  G_TYPE_NONE,
                  2, EMPATHY_TYPE_MESSAGE, G_TYPE_BOOLEAN);

    signals[PART_COMMAND_ENTERED] =
            g_signal_new ("part-command-entered",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL,
                  g_cclosure_marshal_VOID__POINTER,
                  G_TYPE_NONE,
                  1, G_TYPE_STRV);

    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
account_manager_prepared_cb (GObject *source_object,
                 GAsyncResult *result,
                 gpointer user_data)
{
    GList *accounts, *l;
    TpAccountManager *account_manager = TP_ACCOUNT_MANAGER (source_object);
    EmpathyChat *chat = user_data;
    GError *error = NULL;

    if (!tp_account_manager_prepare_finish (account_manager, result, &error)) {
        DEBUG ("Failed to prepare the account manager: %s", error->message);
        g_error_free (error);
        return;
    }

    accounts = tp_account_manager_get_valid_accounts (account_manager);

    for (l = accounts; l != NULL; l = l->next) {
        TpAccount *account = l->data;
        tp_g_signal_connect_object (account, "status-changed",
                         G_CALLBACK (chat_new_connection_cb),
                         chat, 0);
    }

    g_list_free (accounts);
}

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 = tpl_log_manager_dup_singleton ();
    priv->gsettings_chat = g_settings_new (EMPATHY_PREFS_CHAT_SCHEMA);
    priv->gsettings_ui = g_settings_new (EMPATHY_PREFS_UI_SCHEMA);

    priv->contacts_width = -1;
    priv->input_history = NULL;
    priv->input_history_current = NULL;
    priv->account_manager = tp_account_manager_dup ();

    tp_account_manager_prepare_async (priv->account_manager, NULL,
                      account_manager_prepared_cb, chat);

    priv->show_contacts = g_settings_get_boolean (priv->gsettings_chat,
            EMPATHY_PREFS_CHAT_SHOW_CONTACTS_IN_ROOMS);

    /* 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_alias);
    g_completion_set_compare (priv->completion, chat_contacts_completion_func);

    chat_create_ui (chat);
}

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;
}

typedef struct
{
    EmpathyChat *self;
    GtkWidget *info_bar;
    gulong response_id;
    GtkWidget *button;
    GtkWidget *label;
    GtkWidget *entry;
    GtkWidget *spinner;
    gchar *password;
} PasswordData;

static void
passwd_remember_button_cb (GtkButton *button,
              PasswordData *data)
{
    gtk_info_bar_response (GTK_INFO_BAR (data->info_bar), GTK_RESPONSE_OK);
}

static void
passwd_not_now_button_cb (GtkButton *button,
              PasswordData *data)
{
    gtk_info_bar_response (GTK_INFO_BAR (data->info_bar), GTK_RESPONSE_NO);
}

static void
remember_password_infobar_response_cb (GtkWidget *info_bar,
                       gint response_id,
                       PasswordData *data)
{
    EmpathyChatPriv *priv = GET_PRIV (data->self);

    if (response_id == GTK_RESPONSE_OK) {
        DEBUG ("Saving room password");
        empathy_keyring_set_room_password_async (priv->account,
                             empathy_tp_chat_get_id (priv->tp_chat),
                             data->password,
                             NULL, NULL);
    }

    gtk_widget_destroy (info_bar);
    g_free (data->password);
    g_slice_free (PasswordData, data);
}

static void
chat_prompt_to_save_password (EmpathyChat *self,
                  PasswordData *data)
{
    GtkWidget *content_area;
    GtkWidget *hbox;
    GtkWidget *image;
    GtkWidget *label;
    GtkWidget *alig;
    GtkWidget *button;

    /* save the password in case it needs to be saved */
    data->password = g_strdup (gtk_entry_get_text (GTK_ENTRY (data->entry)));

    /* Remove all previous widgets */
    content_area = gtk_info_bar_get_content_area (GTK_INFO_BAR (data->info_bar));
    gtk_container_forall (GTK_CONTAINER (content_area),
                  (GtkCallback) gtk_widget_destroy, NULL);
    data->button = NULL;
    data->label = NULL;
    data->entry = NULL;
    data->spinner = NULL;

    gtk_info_bar_set_message_type (GTK_INFO_BAR (data->info_bar),
                       GTK_MESSAGE_QUESTION);

    hbox = gtk_hbox_new (FALSE, 5);
    gtk_box_pack_start (GTK_BOX (content_area), hbox, TRUE, TRUE, 0);

    /* Add image */
    image = gtk_image_new_from_stock (GTK_STOCK_DIALOG_AUTHENTICATION,
                      GTK_ICON_SIZE_DIALOG);
    gtk_box_pack_start (GTK_BOX (hbox), image, FALSE, FALSE, 0);

    /* Add message */
    label = gtk_label_new (_("Would you like to store this password?"));
    gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 0);

    /* Add 'Remember' button */
    alig = gtk_alignment_new (0, 0.5, 1, 0);

    button = gtk_button_new_with_label (_("Remember"));
    gtk_container_add (GTK_CONTAINER (alig), button);
    gtk_box_pack_start (GTK_BOX (hbox), alig, FALSE, FALSE, 0);

    g_signal_connect (button, "clicked", G_CALLBACK (passwd_remember_button_cb),
              data);

    /* Add 'Not now' button */
    alig = gtk_alignment_new (0, 0.5, 1, 0);

    button = gtk_button_new_with_label (_("Not now"));
    gtk_container_add (GTK_CONTAINER (alig), button);
    gtk_box_pack_start (GTK_BOX (hbox), alig, FALSE, FALSE, 0);

    g_signal_connect (button, "clicked", G_CALLBACK (passwd_not_now_button_cb),
              data);

    /* go! */
    g_signal_handler_disconnect (data->info_bar, data->response_id);
    g_signal_connect (data->info_bar, "response",
              G_CALLBACK (remember_password_infobar_response_cb), data);

    gtk_widget_show_all (data->info_bar);
}

static void
provide_password_cb (GObject *tp_chat,
             GAsyncResult *res,
             gpointer user_data)
{
    PasswordData *data = user_data;
    EmpathyChat *self = data->self;
    EmpathyChatPriv *priv = GET_PRIV (self);
    GError *error = NULL;

    if (!empathy_tp_chat_provide_password_finish (EMPATHY_TP_CHAT (tp_chat), res,
                              &error)) {
        DEBUG ("error: %s", error->message);
        /* FIXME: what should we do if that's another error? Close the channel?
         * Display the raw D-Bus error to the user isn't very useful */
        if (g_error_matches (error, TP_ERRORS, TP_ERROR_AUTHENTICATION_FAILED)) {
            /* entry */
            gtk_entry_set_text (GTK_ENTRY (data->entry), "");
            gtk_widget_set_sensitive (data->entry, TRUE);
            gtk_widget_grab_focus (data->entry);

            /* info bar */
            gtk_info_bar_set_message_type (
                GTK_INFO_BAR (data->info_bar),
                GTK_MESSAGE_ERROR);

            /* button */
            gtk_widget_set_sensitive (data->button, TRUE);
            gtk_button_set_label (GTK_BUTTON (data->button),
                _("Retry"));

            /* label */
            gtk_label_set_text (GTK_LABEL (data->label),
                _("Wrong password; please try again:"));

            /* spinner */
            gtk_spinner_stop (GTK_SPINNER (data->spinner));
            gtk_widget_hide (data->spinner);
        }
        g_error_free (error);
        return;
    }

    if (empathy_keyring_is_available ()) {
        /* ask whether they want to save the password */
        chat_prompt_to_save_password (self, data);
    } else {
        /* Get rid of the password info bar finally */
        gtk_widget_destroy (data->info_bar);
        g_slice_free (PasswordData, data);
    }

    /* Room joined */
    gtk_widget_set_sensitive (priv->hpaned, TRUE);
    gtk_widget_set_sensitive (self->input_text_view, TRUE);
    gtk_widget_grab_focus (self->input_text_view);
}

static void
password_infobar_response_cb (GtkWidget *info_bar,
                  gint response_id,
                  PasswordData *data)
{
    EmpathyChatPriv *priv = GET_PRIV (data->self);
    const gchar *password;

    if (response_id != GTK_RESPONSE_OK) {
        gtk_widget_destroy (info_bar);
        g_slice_free (PasswordData, data);
        return;
    }

    password = gtk_entry_get_text (GTK_ENTRY (data->entry));

    empathy_tp_chat_provide_password_async (priv->tp_chat, password,
                        provide_password_cb, data);

    gtk_widget_set_sensitive (data->button, FALSE);
    gtk_widget_set_sensitive (data->entry, FALSE);

    gtk_spinner_start (GTK_SPINNER (data->spinner));
    gtk_widget_show (data->spinner);
}

static void
password_entry_activate_cb (GtkWidget *entry,
              PasswordData *data)
{
    gtk_info_bar_response (GTK_INFO_BAR (data->info_bar), GTK_RESPONSE_OK);
}

static void
passwd_join_button_cb (GtkButton *button,
              PasswordData *data)
{
    gtk_info_bar_response (GTK_INFO_BAR (data->info_bar), GTK_RESPONSE_OK);
}

static void
clear_icon_released_cb (GtkEntry *entry,
            GtkEntryIconPosition icon_pos,
            GdkEvent *event,
            PasswordData *data)
{
    gtk_entry_set_text (entry, "");
}

static void
password_entry_changed_cb (GtkEditable *entry,
               PasswordData *data)
{
    const gchar *str;

    str = gtk_entry_get_text (GTK_ENTRY (entry));

    gtk_entry_set_icon_sensitive (GTK_ENTRY (entry),
        GTK_ENTRY_ICON_SECONDARY, !EMP_STR_EMPTY (str));
}

static void
infobar_chat_invalidated_cb (TpProxy       *proxy,
               guint          domain,
               gint           code,
               gchar         *message,
               gpointer       password_infobar)
{
    /* Destroy the password infobar whenever a channel is invalidated
     * so we don't have multiple infobars when the MUC is rejoined */
    gtk_widget_destroy (GTK_WIDGET (password_infobar));
}

static void
display_password_info_bar (EmpathyChat *self)
{
    EmpathyChatPriv *priv = GET_PRIV (self);
    GtkWidget *info_bar;
    GtkWidget *content_area;
    GtkWidget *hbox;
    GtkWidget *image;
    GtkWidget *label;
    GtkWidget *entry;
    GtkWidget *alig;
    GtkWidget *button;
    GtkWidget *spinner;
    PasswordData *data;

    data = g_slice_new0 (PasswordData);

    info_bar = gtk_info_bar_new ();
    gtk_info_bar_set_message_type (GTK_INFO_BAR (info_bar),
        GTK_MESSAGE_QUESTION);

    content_area = gtk_info_bar_get_content_area (GTK_INFO_BAR (info_bar));

    hbox = gtk_hbox_new (FALSE, 5);
    gtk_box_pack_start (GTK_BOX (content_area), hbox, TRUE, TRUE, 0);

    /* Add image */
    image = gtk_image_new_from_stock (GTK_STOCK_DIALOG_AUTHENTICATION,
                      GTK_ICON_SIZE_DIALOG);
    gtk_box_pack_start (GTK_BOX (hbox), image, FALSE, FALSE, 0);

    /* Add message */
    label = gtk_label_new (_("This room is protected by a password:"));
    gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);

    /* Add password entry */
    entry = gtk_entry_new ();
    gtk_entry_set_visibility (GTK_ENTRY (entry), FALSE);
    gtk_box_pack_start (GTK_BOX (hbox), entry, TRUE, TRUE, 0);

    gtk_entry_set_icon_from_stock (GTK_ENTRY (entry),
                       GTK_ENTRY_ICON_SECONDARY, GTK_STOCK_CLEAR);
    gtk_entry_set_icon_sensitive (GTK_ENTRY (entry),
                      GTK_ENTRY_ICON_SECONDARY, FALSE);

    g_signal_connect (entry, "icon-release",
              G_CALLBACK (clear_icon_released_cb), data);
    g_signal_connect (entry, "changed",
              G_CALLBACK (password_entry_changed_cb), data);

    g_signal_connect (entry, "activate",
              G_CALLBACK (password_entry_activate_cb), data);

    /* Focus the password entry once it's realized */
    g_signal_connect (entry, "realize", G_CALLBACK (gtk_widget_grab_focus), NULL);

    /* Add 'Join' button */
    alig = gtk_alignment_new (0, 0.5, 1, 0);

    button = gtk_button_new_with_label (_("Join"));
    gtk_container_add (GTK_CONTAINER (alig), button);
    gtk_box_pack_start (GTK_BOX (hbox), alig, FALSE, FALSE, 0);

    g_signal_connect (button, "clicked", G_CALLBACK (passwd_join_button_cb),
              data);

    /* Add spinner */
    spinner = gtk_spinner_new ();
    gtk_box_pack_end (GTK_BOX (hbox), spinner, FALSE, FALSE, 0);

    /* Save some data for messing around with later */
    data->self = self;
    data->info_bar = info_bar;
    data->button = button;
    data->label = label;
    data->entry = entry;
    data->spinner = spinner;

    gtk_box_pack_start (GTK_BOX (priv->info_bar_vbox), info_bar,
                TRUE, TRUE, 3);
    gtk_widget_show_all (hbox);

    tp_g_signal_connect_object (priv->tp_chat,
                  "invalidated", G_CALLBACK (infobar_chat_invalidated_cb),
                  info_bar, 0);

    data->response_id = g_signal_connect (info_bar, "response",
                          G_CALLBACK (password_infobar_response_cb), data);

    gtk_widget_show_all (info_bar);
    /* ... but hide the spinner */
    gtk_widget_hide (spinner);

    /* prevent the user from typing anything */
    gtk_widget_set_sensitive (self->input_text_view, FALSE);
}

static void
provide_saved_password_cb (GObject *tp_chat,
               GAsyncResult *res,
               gpointer user_data)
{
    EmpathyChat *self = user_data;
    EmpathyChatPriv *priv = GET_PRIV (self);
    GError *error = NULL;

    if (!empathy_tp_chat_provide_password_finish (EMPATHY_TP_CHAT (tp_chat), res,
                              &error)) {
        DEBUG ("error: %s", error->message);
        /* FIXME: what should we do if that's another error? Close the channel?
         * Display the raw D-Bus error to the user isn't very useful */
        if (g_error_matches (error, TP_ERRORS, TP_ERROR_AUTHENTICATION_FAILED)) {
            display_password_info_bar (self);
            gtk_widget_set_sensitive (priv->hpaned, FALSE);
        }
        g_error_free (error);
        return;
    }

    /* Room joined */
    gtk_widget_set_sensitive (priv->hpaned, TRUE);
    gtk_widget_grab_focus (self->input_text_view);
}

static void
chat_room_got_password_cb (GObject *source,
               GAsyncResult *result,
               gpointer user_data)
{
    EmpathyChat *self = user_data;
    EmpathyChatPriv *priv = GET_PRIV (self);
    const gchar *password;
    GError *error = NULL;

    password = empathy_keyring_get_room_password_finish (priv->account,
        result, &error);

    if (error != NULL) {
        DEBUG ("Couldn't get room password: %s\n", error->message);
        g_clear_error (&error);

        display_password_info_bar (self);
        gtk_widget_set_sensitive (priv->hpaned, FALSE);
        return;
    }

    empathy_tp_chat_provide_password_async (priv->tp_chat, password,
                        provide_saved_password_cb, self);
}

static void
chat_password_needed_changed_cb (EmpathyChat *self)
{
    EmpathyChatPriv *priv = GET_PRIV (self);

    if (empathy_tp_chat_password_needed (priv->tp_chat)) {
        empathy_keyring_get_room_password_async (priv->account,
                             empathy_tp_chat_get_id (priv->tp_chat),
                             chat_room_got_password_cb, self);
    }
}

static void
chat_sms_channel_changed_cb (EmpathyChat *self)
{
    EmpathyChatPriv *priv = GET_PRIV (self);

    priv->sms_channel = empathy_tp_chat_is_sms_channel (priv->tp_chat);
    g_object_notify (G_OBJECT (self), "sms-channel");
}

static void
chat_n_messages_sending_changed_cb (EmpathyChat *self)
{
    g_object_notify (G_OBJECT (self), "n-messages-sending");
}

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

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

    if (priv->tp_chat) {
        return;
    }

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

    priv->tp_chat = g_object_ref (tp_chat);
    priv->account = g_object_ref (empathy_tp_chat_get_account (priv->tp_chat));

    g_signal_connect (tp_chat, "invalidated",
              G_CALLBACK (chat_invalidated_cb),
              chat);
    g_signal_connect (tp_chat, "message-received-empathy",
              G_CALLBACK (chat_message_received_cb),
              chat);
    g_signal_connect (tp_chat, "message_acknowledged",
              G_CALLBACK (chat_message_acknowledged_cb),
              chat);
    g_signal_connect (tp_chat, "send-error",
              G_CALLBACK (chat_send_error_cb),
              chat);
    g_signal_connect (tp_chat, "chat-state-changed-empathy",
              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 (tp_chat, "member-renamed",
              G_CALLBACK (chat_member_renamed_cb),
              chat);
    g_signal_connect_swapped (tp_chat, "notify::remote-contact",
                  G_CALLBACK (chat_remote_contact_changed_cb),
                  chat);
    g_signal_connect_swapped (tp_chat, "notify::password-needed",
                  G_CALLBACK (chat_password_needed_changed_cb),
                  chat);
    g_signal_connect_swapped (tp_chat, "notify::sms-channel",
                  G_CALLBACK (chat_sms_channel_changed_cb),
                  chat);
    g_signal_connect_swapped (tp_chat, "notify::n-messages-sending",
                  G_CALLBACK (chat_n_messages_sending_changed_cb),
                  chat);

    /* Get initial value of properties */
    properties = empathy_tp_chat_get_properties (priv->tp_chat);
    if (properties != NULL) {
        guint i;

        for (i = 0; i < properties->len; i++) {
            EmpathyTpChatProperty *property;

            property = g_ptr_array_index (properties, i);
            if (property->value == NULL)
                continue;

            chat_property_changed_cb (priv->tp_chat,
                          property->name,
                          property->value,
                          chat);
        }
    }

    chat_sms_channel_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);

    /* check if a password is needed */
    chat_password_needed_changed_cb (chat);
}

TpAccount *
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;
}

gchar *
empathy_chat_dup_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_alias (priv->remote_contact);
    }

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

    if (!ret)
        ret = _("Conversation");

    if (priv->sms_channel)
        /* Translators: this string is a something like
         * "Escher Cat (SMS)" */
        return g_strdup_printf (_("%s (SMS)"), ret);
    else
        return g_strdup (ret);
}

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 |
                         EMPATHY_CONTACT_FEATURE_BLOCK);
    }

    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);
    }
    else {
        gint start_offset;
        gint end_offset;
        EmpathyChatPriv *priv = GET_PRIV (chat);

        if (gtk_label_get_selection_bounds (GTK_LABEL (priv->label_topic),
                                   &start_offset,
                                   &end_offset)) {
            gchar *start;
            gchar *end;
            gchar *selection;
            const gchar *topic;
            GtkClipboard *clipboard;

            topic = gtk_label_get_text (GTK_LABEL (priv->label_topic));
            start = g_utf8_offset_to_pointer (topic, start_offset);
            end = g_utf8_offset_to_pointer (topic, end_offset);
            selection = g_strndup (start, end - start);

            clipboard = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);
            gtk_clipboard_set_text (clipboard, selection, -1);

            g_free (selection);
        }
    }
}

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 (gtk_widget_get_visible (priv->search_bar)) {
        empathy_search_bar_paste_clipboard (EMPATHY_SEARCH_BAR (priv->search_bar));
        return;
    }

    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_find (EmpathyChat *chat)
{
    EmpathyChatPriv *priv;

    g_return_if_fail (EMPATHY_IS_CHAT (chat));

    priv = GET_PRIV (chat);

    empathy_search_bar_show (EMPATHY_SEARCH_BAR (priv->search_bar));
}

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);
}

guint
empathy_chat_get_nb_unread_messages (EmpathyChat *self)
{
    EmpathyChatPriv *priv = GET_PRIV (self);

    g_return_val_if_fail (EMPATHY_IS_CHAT (self), 0);

    return priv->unread_messages;
}

/* called when the messages have been read by user */
void
empathy_chat_messages_read (EmpathyChat *self)
{
    EmpathyChatPriv *priv = GET_PRIV (self);

    g_return_if_fail (EMPATHY_IS_CHAT (self));

    /* FIXME: See Bug#610994, See comments about it in EmpathyChatPriv
     * definition. If we are still retrieving the backlogs, do not ACK */
    if (priv->retrieving_backlogs)
        return;

    if (priv->tp_chat != NULL) {
        empathy_tp_chat_acknowledge_all_messages (priv->tp_chat);
    }
}

/* Return TRUE if on of the contacts in this chat is composing */
gboolean
empathy_chat_is_composing (EmpathyChat *chat)
{
  return chat->priv->compositors != NULL;
}

gboolean
empathy_chat_is_sms_channel (EmpathyChat *self)
{
    EmpathyChatPriv *priv = GET_PRIV (self);

    g_return_val_if_fail (EMPATHY_IS_CHAT (self), 0);

    return priv->sms_channel;
}

guint
empathy_chat_get_n_messages_sending (EmpathyChat *self)
{
    EmpathyChatPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CHAT (self), 0);

    priv = GET_PRIV (self);

    if (priv->tp_chat == NULL) {
        return 0;
    } else {
        guint n_messages;

        g_object_get (priv->tp_chat,
            "n-messages-sending", &n_messages,
            NULL);

        return n_messages;
    }
}

gchar *
empathy_chat_dup_text (EmpathyChat *self)
{
    GtkTextBuffer *buffer;
    GtkTextIter     start, end;

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

    gtk_text_buffer_get_bounds (buffer, &start, &end);
    return gtk_text_buffer_get_text (buffer, &start, &end, FALSE);
}

void
empathy_chat_set_text (EmpathyChat *self,
               const gchar *text)
{
    GtkTextBuffer *buffer;

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

    gtk_text_buffer_set_text (buffer, text, -1);
}