path: root/src/empathy-chat-window.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2003-2007 Imendio AB
 * Copyright (C) 2007-2008 Collabora Ltd.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA  02110-1301  USA
 *
 * Authors: Mikael Hallendal <micke@imendio.com>
 *          Richard Hult <richard@imendio.com>
 *          Martyn Russell <martyn@imendio.com>
 *          Geert-Jan Van den Bogaerde <geertjan@gnome.org>
 *          Xavier Claessens <xclaesse@gmail.com>
 */

#include <config.h>

#include <string.h>

#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include <glib/gi18n.h>
#include <libnotify/notification.h>

#include <telepathy-glib/util.h>
#include <libmissioncontrol/mission-control.h>

#include <libempathy/empathy-contact.h>
#include <libempathy/empathy-message.h>
#include <libempathy/empathy-dispatcher.h>
#include <libempathy/empathy-chatroom-manager.h>
#include <libempathy/empathy-account-manager.h>
#include <libempathy/empathy-utils.h>

#include <libempathy-gtk/empathy-images.h>
#include <libempathy-gtk/empathy-conf.h>
#include <libempathy-gtk/empathy-contact-dialogs.h>
#include <libempathy-gtk/empathy-log-window.h>
#include <libempathy-gtk/empathy-geometry.h>
#include <libempathy-gtk/empathy-smiley-manager.h>
#include <libempathy-gtk/empathy-sound.h>
#include <libempathy-gtk/empathy-ui-utils.h>

#include "empathy-chat-window.h"
#include "empathy-about-dialog.h"
#include "empathy-misc.h"

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

#define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyChatWindow)
typedef struct {
    EmpathyChat *current_chat;
    GList       *chats;
    GList       *chats_new_msg;
    GList       *chats_composing;
    gboolean     page_added;
    gboolean     dnd_same_window;
    guint        save_geometry_id;
    EmpathyChatroomManager *chatroom_manager;
    GtkWidget   *dialog;
    GtkWidget   *notebook;
    NotifyNotification *notification;

    /* Menu items. */
    GtkUIManager *ui_manager;
    GtkAction   *menu_conv_insert_smiley;
    GtkAction   *menu_conv_favorite;
    GtkAction   *menu_conv_toggle_contacts;

    GtkAction   *menu_edit_cut;
    GtkAction   *menu_edit_copy;
    GtkAction   *menu_edit_paste;

    GtkAction   *menu_tabs_next;
    GtkAction   *menu_tabs_prev;
    GtkAction   *menu_tabs_left;
    GtkAction   *menu_tabs_right;
    GtkAction   *menu_tabs_detach;
} EmpathyChatWindowPriv;

static GList *chat_windows = NULL;

static const guint tab_accel_keys[] = {
    GDK_1, GDK_2, GDK_3, GDK_4, GDK_5,
    GDK_6, GDK_7, GDK_8, GDK_9, GDK_0
};

typedef enum {
    DND_DRAG_TYPE_CONTACT_ID,
    DND_DRAG_TYPE_TAB
} DndDragType;

static const GtkTargetEntry drag_types_dest[] = {
    { "text/contact-id", 0, DND_DRAG_TYPE_CONTACT_ID },
    { "GTK_NOTEBOOK_TAB", GTK_TARGET_SAME_APP, DND_DRAG_TYPE_TAB },
};

G_DEFINE_TYPE (EmpathyChatWindow, empathy_chat_window, G_TYPE_OBJECT);

static void
chat_window_accel_cb (GtkAccelGroup    *accelgroup,
              GObject          *object,
              guint             key,
              GdkModifierType   mod,
              EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;
    gint                  num = -1;
    gint                  i;

    priv = GET_PRIV (window);

    for (i = 0; i < G_N_ELEMENTS (tab_accel_keys); i++) {
        if (tab_accel_keys[i] == key) {
            num = i;
            break;
        }
    }

    if (num != -1) {
        gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->notebook), num);
    }
}

static EmpathyChatWindow *
chat_window_find_chat (EmpathyChat *chat)
{
    EmpathyChatWindowPriv *priv;
    GList                 *l, *ll;

    for (l = chat_windows; l; l = l->next) {
        priv = GET_PRIV (l->data);
        ll = g_list_find (priv->chats, chat);
        if (ll) {
            return l->data;
        }
    }

    return NULL;
}

static void
chat_window_close_clicked_cb (GtkAction   *action,
                  EmpathyChat *chat)
{
    EmpathyChatWindow *window;

    window = chat_window_find_chat (chat);
    empathy_chat_window_remove_chat (window, chat);
}

static void
chat_tab_style_set_cb (GtkWidget *hbox,
                       GtkStyle  *previous_style,
                       gpointer   user_data)
{
    GtkWidget *button;
    int char_width, h, w;
    PangoContext *context;
    PangoFontMetrics *metrics;

    button = g_object_get_data (G_OBJECT (user_data),
        "chat-window-tab-close-button");
    context = gtk_widget_get_pango_context (hbox);

    metrics = pango_context_get_metrics (context, gtk_widget_get_style (hbox)->font_desc,
        pango_context_get_language (context));
    char_width = pango_font_metrics_get_approximate_char_width (metrics);
    pango_font_metrics_unref (metrics);

    gtk_icon_size_lookup_for_settings (gtk_widget_get_settings (button),
                       GTK_ICON_SIZE_MENU, &w, &h);

    /* Request at least about 12 chars width plus at least space for the status
     * image and the close button */
    gtk_widget_set_size_request (hbox,
        12 * PANGO_PIXELS (char_width) + 2 * w, -1);

    gtk_widget_set_size_request (button, w, h);
}

static GtkWidget *
chat_window_create_label (EmpathyChatWindow *window,
              EmpathyChat       *chat,
              gboolean           is_tab_label)
{
    EmpathyChatWindowPriv *priv;
    GtkWidget            *hbox;
    GtkWidget            *name_label;
    GtkWidget            *status_image;
    GtkWidget            *close_button;
    GtkWidget            *close_image;
    GtkWidget            *event_box;
    GtkWidget            *event_box_hbox;
    PangoAttrList        *attr_list;
    PangoAttribute       *attr;

    priv = GET_PRIV (window);

    /* The spacing between the button and the label. */
    hbox = gtk_hbox_new (FALSE, 0);

    event_box = gtk_event_box_new ();
    gtk_event_box_set_visible_window (GTK_EVENT_BOX (event_box), FALSE);

    name_label = gtk_label_new (NULL);
    if (is_tab_label)
        gtk_label_set_ellipsize (GTK_LABEL (name_label), PANGO_ELLIPSIZE_END);

    attr_list = pango_attr_list_new ();
    attr = pango_attr_scale_new (1/1.2);
    attr->start_index = 0;
    attr->end_index = -1;
    pango_attr_list_insert (attr_list, attr);
    gtk_label_set_attributes (GTK_LABEL (name_label), attr_list);
    pango_attr_list_unref (attr_list);

    gtk_misc_set_padding (GTK_MISC (name_label), 2, 0);
    gtk_misc_set_alignment (GTK_MISC (name_label), 0.0, 0.5);
    g_object_set_data (G_OBJECT (chat),
        is_tab_label ? "chat-window-tab-label" : "chat-window-menu-label",
        name_label);

    status_image = gtk_image_new ();

    /* Spacing between the icon and label. */
    event_box_hbox = gtk_hbox_new (FALSE, 0);

    gtk_box_pack_start (GTK_BOX (event_box_hbox), status_image, FALSE, FALSE, 0);
    gtk_box_pack_start (GTK_BOX (event_box_hbox), name_label, TRUE, TRUE, 0);

    g_object_set_data (G_OBJECT (chat),
        is_tab_label ? "chat-window-tab-image" : "chat-window-menu-image",
        status_image);
    g_object_set_data (G_OBJECT (chat),
        is_tab_label ? "chat-window-tab-tooltip-widget" : "chat-window-menu-tooltip-widget",
        event_box);

    gtk_container_add (GTK_CONTAINER (event_box), event_box_hbox);
    gtk_box_pack_start (GTK_BOX (hbox), event_box, TRUE, TRUE, 0);

    if (is_tab_label) {
        close_button = gtk_button_new ();
        gtk_button_set_relief (GTK_BUTTON (close_button), GTK_RELIEF_NONE);
        g_object_set_data (G_OBJECT (chat), "chat-window-tab-close-button", close_button);

        /* We don't want focus/keynav for the button to avoid clutter, and
         * Ctrl-W works anyway.
         */
        GTK_WIDGET_UNSET_FLAGS (close_button, GTK_CAN_FOCUS);
        GTK_WIDGET_UNSET_FLAGS (close_button, GTK_CAN_DEFAULT);

        /* Set the name to make the special rc style match. */
        gtk_widget_set_name (close_button, "empathy-close-button");

        close_image = gtk_image_new_from_stock (GTK_STOCK_CLOSE, GTK_ICON_SIZE_MENU);

        gtk_container_add (GTK_CONTAINER (close_button), close_image);

        gtk_box_pack_end (GTK_BOX (hbox), close_button, FALSE, FALSE, 0);

        g_signal_connect (close_button,
                  "clicked",
                  G_CALLBACK (chat_window_close_clicked_cb),
                  chat);

        /* React to theme changes and also setup the size correctly.  */
        g_signal_connect (hbox,
                  "style-set",
                  G_CALLBACK (chat_tab_style_set_cb),
                  chat);
    }

    gtk_widget_show_all (hbox);

    return hbox;
}

static void
chat_window_update (EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv = GET_PRIV (window);
    gboolean               first_page;
    gboolean               last_page;
    gboolean               is_connected;
    gint                   num_pages;
    gint                   page_num;
    gint                   i;
    const gchar           *name;
    guint                  n_chats;
    GdkPixbuf             *icon;
    EmpathyContact        *remote_contact;
    gboolean               avatar_in_icon;
    GtkWidget             *chat;
    GtkWidget             *chat_close_button;
    GtkWidget             *submenu;
    GtkWidget             *menu;

    /* Get information */
    page_num = gtk_notebook_get_current_page (GTK_NOTEBOOK (priv->notebook));
    num_pages = gtk_notebook_get_n_pages (GTK_NOTEBOOK (priv->notebook));
    first_page = (page_num == 0);
    last_page = (page_num == (num_pages - 1));
    is_connected = empathy_chat_get_tp_chat (priv->current_chat) != NULL;
    name = empathy_chat_get_name (priv->current_chat);
    n_chats = g_list_length (priv->chats);

    DEBUG ("Update window");

    /* Update menu */
    gtk_action_set_sensitive (priv->menu_tabs_next, !last_page);
    gtk_action_set_sensitive (priv->menu_tabs_prev, !first_page);
    gtk_action_set_sensitive (priv->menu_tabs_detach, num_pages > 1);
    gtk_action_set_sensitive (priv->menu_tabs_left, !first_page);
    gtk_action_set_sensitive (priv->menu_tabs_right, !last_page);
    gtk_action_set_sensitive (priv->menu_conv_insert_smiley, is_connected);

    /* Update Contact menu */
    menu = gtk_ui_manager_get_widget (priv->ui_manager,
        "/chats_menubar/menu_contact");
    submenu = empathy_chat_get_contact_menu (priv->current_chat);
    gtk_menu_item_set_submenu (GTK_MENU_ITEM (menu), submenu);
    gtk_widget_show (menu);

    /* Update window title */
    if (n_chats == 1) {
        gtk_window_set_title (GTK_WINDOW (priv->dialog), name);
    } else {
        gchar *title;

        title = g_strdup_printf (_("Conversations (%d)"), n_chats);
        gtk_window_set_title (GTK_WINDOW (priv->dialog), title);
        g_free (title);
    }

    /* Update window icon */
    if (priv->chats_new_msg) {
        gtk_window_set_icon_name (GTK_WINDOW (priv->dialog),
                      EMPATHY_IMAGE_MESSAGE);
    } else {
        empathy_conf_get_bool (empathy_conf_get (),
                       EMPATHY_PREFS_CHAT_AVATAR_IN_ICON,
                       &avatar_in_icon);

        if (n_chats == 1 && avatar_in_icon) {
            remote_contact = empathy_chat_get_remote_contact (priv->current_chat);
            icon = empathy_pixbuf_avatar_from_contact_scaled (remote_contact, 0, 0);
            gtk_window_set_icon (GTK_WINDOW (priv->dialog), icon);

            if (icon != NULL) {
                g_object_unref (icon);
            }
        } else {
            gtk_window_set_icon_name (GTK_WINDOW (priv->dialog), NULL);
        }
    }

    if (num_pages == 1) {
        chat = gtk_notebook_get_nth_page (GTK_NOTEBOOK (priv->notebook), 0);
        chat_close_button = g_object_get_data (G_OBJECT (chat),
                "chat-window-tab-close-button");
        gtk_widget_hide (chat_close_button);
    } else {
        for (i=0; i<num_pages; i++) {
            chat = gtk_notebook_get_nth_page (GTK_NOTEBOOK (priv->notebook), i);
            chat_close_button = g_object_get_data (G_OBJECT (chat),
                    "chat-window-tab-close-button");
            gtk_widget_show (chat_close_button);
        }
    }
}

static void
append_markup_printf (GString    *string,
              const char *format,
              ...)
{
    gchar *tmp;
    va_list args;

    va_start (args, format);

    tmp = g_markup_vprintf_escaped (format, args);
    g_string_append (string, tmp);
    g_free (tmp);

    va_end (args);
}

static void
chat_window_update_chat_tab (EmpathyChat *chat)
{
    EmpathyChatWindow     *window;
    EmpathyChatWindowPriv *priv;
    EmpathyContact        *remote_contact;
    const gchar           *name;
    const gchar           *id;
    EmpathyAccount        *account;
    const gchar           *subject;
    const gchar           *status = NULL;
    GtkWidget             *widget;
    GString               *tooltip;
    gchar                 *markup;
    const gchar           *icon_name;

    window = chat_window_find_chat (chat);
    if (!window) {
        return;
    }
    priv = GET_PRIV (window);

    /* Get information */
    name = empathy_chat_get_name (chat);
    account = empathy_chat_get_account (chat);
    subject = empathy_chat_get_subject (chat);
    remote_contact = empathy_chat_get_remote_contact (chat);

    DEBUG ("Updating chat tab, name=%s, account=%s, subject=%s, remote_contact=%p",
        name, empathy_account_get_unique_name (account), subject, remote_contact);

    /* Update tab image */
    if (g_list_find (priv->chats_new_msg, chat)) {
        icon_name = EMPATHY_IMAGE_MESSAGE;
    }
    else if (g_list_find (priv->chats_composing, chat)) {
        icon_name = EMPATHY_IMAGE_TYPING;
    }
    else if (remote_contact) {
        icon_name = empathy_icon_name_for_contact (remote_contact);
    } else {
        icon_name = EMPATHY_IMAGE_GROUP_MESSAGE;
    }
    widget = g_object_get_data (G_OBJECT (chat), "chat-window-tab-image");
    gtk_image_set_from_icon_name (GTK_IMAGE (widget), icon_name, GTK_ICON_SIZE_MENU);
    widget = g_object_get_data (G_OBJECT (chat), "chat-window-menu-image");
    gtk_image_set_from_icon_name (GTK_IMAGE (widget), icon_name, GTK_ICON_SIZE_MENU);

    /* Update tab tooltip */
    tooltip = g_string_new (NULL);

    if (remote_contact) {
        id = empathy_contact_get_id (remote_contact);
        status = empathy_contact_get_presence_message (remote_contact);
    } else {
        id = name;
    }

    append_markup_printf (tooltip,
                  "<b>%s</b><small> (%s)</small>",
                  id,
                  empathy_account_get_display_name (account));

    if (!EMP_STR_EMPTY (status)) {
        append_markup_printf (tooltip, "\n<i>%s</i>", status);
    }

    if (subject) {
        append_markup_printf (tooltip, "\n<b>%s</b> %s",
                      _("Topic:"), subject);
    }

    if (g_list_find (priv->chats_composing, chat)) {
        append_markup_printf (tooltip, "\n%s", _("Typing a message."));
    }

    markup = g_string_free (tooltip, FALSE);
    widget = g_object_get_data (G_OBJECT (chat), "chat-window-tab-tooltip-widget");
    gtk_widget_set_tooltip_markup (widget, markup);
    widget = g_object_get_data (G_OBJECT (chat), "chat-window-menu-tooltip-widget");
    gtk_widget_set_tooltip_markup (widget, markup);
    g_free (markup);

    /* Update tab and menu label */
    widget = g_object_get_data (G_OBJECT (chat), "chat-window-tab-label");
    gtk_label_set_text (GTK_LABEL (widget), name);
    widget = g_object_get_data (G_OBJECT (chat), "chat-window-menu-label");
    gtk_label_set_text (GTK_LABEL (widget), name);

    /* Update the window if it's the current chat */
    if (priv->current_chat == chat) {
        chat_window_update (window);
    }
}

static void
chat_window_chat_notify_cb (EmpathyChat *chat)
{
    EmpathyContact *old_remote_contact;
    EmpathyContact *remote_contact = NULL;

    old_remote_contact = g_object_get_data (G_OBJECT (chat), "chat-window-remote-contact");
    remote_contact = empathy_chat_get_remote_contact (chat);

    if (old_remote_contact != remote_contact) {
        /* The remote-contact associated with the chat changed, we need
         * to keep track of any change of that contact and update the
         * window each time. */
        if (remote_contact) {
            g_signal_connect_swapped (remote_contact, "notify",
                          G_CALLBACK (chat_window_update_chat_tab),
                          chat);
        }
        if (old_remote_contact) {
            g_signal_handlers_disconnect_by_func (old_remote_contact,
                                  chat_window_update_chat_tab,
                                  chat);
        }

        g_object_set_data (G_OBJECT (chat), "chat-window-remote-contact",
                   remote_contact);
    }

    chat_window_update_chat_tab (chat);
}

static void
chat_window_insert_smiley_activate_cb (EmpathySmileyManager *manager,
                       EmpathySmiley        *smiley,
                       gpointer              window)
{
    EmpathyChatWindowPriv *priv = GET_PRIV (window);
    EmpathyChat           *chat;
    GtkTextBuffer         *buffer;
    GtkTextIter            iter;

    chat = priv->current_chat;

    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);
}

static void
chat_window_conv_activate_cb (GtkAction         *action,
                  EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv = GET_PRIV (window);
    gboolean               is_room;
    gboolean               active;
    EmpathyContact        *remote_contact = NULL;

    /* Favorite room menu */
    is_room = empathy_chat_is_room (priv->current_chat);
    if (is_room) {
        const gchar *room;
        EmpathyAccount   *account;
        gboolean     found = FALSE;
        EmpathyChatroom *chatroom;

        room = empathy_chat_get_id (priv->current_chat);
        account = empathy_chat_get_account (priv->current_chat);
        chatroom = empathy_chatroom_manager_find (priv->chatroom_manager,
                               account, room);
        if (chatroom != NULL)
            found = empathy_chatroom_is_favorite (chatroom);

        DEBUG ("This room %s favorite", found ? "is" : "is not");
        gtk_toggle_action_set_active (
            GTK_TOGGLE_ACTION (priv->menu_conv_favorite), found);
    }
    gtk_action_set_visible (priv->menu_conv_favorite, is_room);

    /* Show contacts menu */
    g_object_get (priv->current_chat,
              "remote-contact", &remote_contact,
              "show-contacts", &active,
              NULL);
    if (remote_contact == NULL) {
        gtk_toggle_action_set_active (
            GTK_TOGGLE_ACTION (priv->menu_conv_toggle_contacts),
                       active);
    }
    gtk_action_set_visible (priv->menu_conv_toggle_contacts,
                (remote_contact == NULL));
    if (remote_contact != NULL) {
        g_object_unref (remote_contact);
    }
}

static void
chat_window_clear_activate_cb (GtkAction         *action,
                   EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv = GET_PRIV (window);

    empathy_chat_clear (priv->current_chat);
}

static void
chat_window_favorite_toggled_cb (GtkToggleAction   *toggle_action,
                 EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv = GET_PRIV (window);
    gboolean               active;
    EmpathyAccount        *account;
    const gchar           *room;
    EmpathyChatroom       *chatroom;

    active = gtk_toggle_action_get_active (toggle_action);
    account = empathy_chat_get_account (priv->current_chat);
    room = empathy_chat_get_id (priv->current_chat);

    chatroom = empathy_chatroom_manager_find (priv->chatroom_manager,
                          account, room);

    if (chatroom == NULL) {
        const gchar *name;

        name = empathy_chat_get_name (priv->current_chat);
        chatroom = empathy_chatroom_new_full (account, room, name, FALSE);
        empathy_chatroom_manager_add (priv->chatroom_manager, chatroom);
        g_object_unref (chatroom);
  }

    empathy_chatroom_set_favorite (chatroom, active);
}

static void
chat_window_contacts_toggled_cb (GtkToggleAction   *toggle_action,
                 EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv = GET_PRIV (window);
    gboolean               active;

    active = gtk_toggle_action_get_active (toggle_action);

    empathy_chat_set_show_contacts (priv->current_chat, active);
}

static const gchar *
chat_get_window_id_for_geometry (EmpathyChat *chat)
{
    const gchar *res = NULL;
    gboolean     separate_windows;

    empathy_conf_get_bool (empathy_conf_get (),
                   EMPATHY_PREFS_UI_SEPARATE_CHAT_WINDOWS,
                   &separate_windows);

    if (separate_windows) {
        res = empathy_chat_get_id (chat);
    }

    return res ? res : "chat-window";
}

static gboolean
chat_window_save_geometry_timeout_cb (EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;
    gint                  x, y, w, h;

    priv = GET_PRIV (window);

    gtk_window_get_size (GTK_WINDOW (priv->dialog), &w, &h);
    gtk_window_get_position (GTK_WINDOW (priv->dialog), &x, &y);

    empathy_geometry_save (chat_get_window_id_for_geometry (priv->current_chat),
                   x, y, w, h);

    priv->save_geometry_id = 0;

    return FALSE;
}

static gboolean
chat_window_configure_event_cb (GtkWidget         *widget,
                GdkEventConfigure *event,
                EmpathyChatWindow  *window)
{
    EmpathyChatWindowPriv *priv;

    priv = GET_PRIV (window);

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

    priv->save_geometry_id =
        g_timeout_add_seconds (1,
                       (GSourceFunc) chat_window_save_geometry_timeout_cb,
                       window);

    return FALSE;
}

static void
chat_window_close_activate_cb (GtkAction         *action,
                   EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;

    priv = GET_PRIV (window);

    g_return_if_fail (priv->current_chat != NULL);

    empathy_chat_window_remove_chat (window, priv->current_chat);
}

static void
chat_window_edit_activate_cb (GtkAction         *action,
                  EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;
    GtkClipboard         *clipboard;
    GtkTextBuffer        *buffer;
    gboolean              text_available;

    priv = GET_PRIV (window);

    g_return_if_fail (priv->current_chat != NULL);

    if (!empathy_chat_get_tp_chat (priv->current_chat)) {
        gtk_action_set_sensitive (priv->menu_edit_copy, FALSE);
        gtk_action_set_sensitive (priv->menu_edit_cut, FALSE);
        gtk_action_set_sensitive (priv->menu_edit_paste, FALSE);
        return;
    }

    buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (priv->current_chat->input_text_view));
    if (gtk_text_buffer_get_has_selection (buffer)) {
        gtk_action_set_sensitive (priv->menu_edit_copy, TRUE);
        gtk_action_set_sensitive (priv->menu_edit_cut, TRUE);
    } else {
        gboolean selection;

        selection = empathy_chat_view_get_has_selection (priv->current_chat->view);

        gtk_action_set_sensitive (priv->menu_edit_cut, FALSE);
        gtk_action_set_sensitive (priv->menu_edit_copy, selection);
    }

    clipboard = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);
    text_available = gtk_clipboard_wait_is_text_available (clipboard);
    gtk_action_set_sensitive (priv->menu_edit_paste, text_available);
}

static void
chat_window_cut_activate_cb (GtkAction         *action,
                 EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;

    g_return_if_fail (EMPATHY_IS_CHAT_WINDOW (window));

    priv = GET_PRIV (window);

    empathy_chat_cut (priv->current_chat);
}

static void
chat_window_copy_activate_cb (GtkAction         *action,
                  EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;

    g_return_if_fail (EMPATHY_IS_CHAT_WINDOW (window));

    priv = GET_PRIV (window);

    empathy_chat_copy (priv->current_chat);
}

static void
chat_window_paste_activate_cb (GtkAction         *action,
                   EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;

    g_return_if_fail (EMPATHY_IS_CHAT_WINDOW (window));

    priv = GET_PRIV (window);

    empathy_chat_paste (priv->current_chat);
}

static void
chat_window_tabs_left_activate_cb (GtkAction         *action,
                   EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;
    EmpathyChat           *chat;
    gint                  index;

    priv = GET_PRIV (window);

    chat = priv->current_chat;
    index = gtk_notebook_get_current_page (GTK_NOTEBOOK (priv->notebook));
    if (index <= 0) {
        return;
    }

    gtk_notebook_reorder_child (GTK_NOTEBOOK (priv->notebook),
                    GTK_WIDGET (chat),
                    index - 1);
}

static void
chat_window_tabs_right_activate_cb (GtkAction         *action,
                    EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;
    EmpathyChat           *chat;
    gint                  index;

    priv = GET_PRIV (window);

    chat = priv->current_chat;
    index = gtk_notebook_get_current_page (GTK_NOTEBOOK (priv->notebook));

    gtk_notebook_reorder_child (GTK_NOTEBOOK (priv->notebook),
                    GTK_WIDGET (chat),
                    index + 1);
}

static void
chat_window_detach_activate_cb (GtkAction         *action,
                EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;
    EmpathyChatWindow     *new_window;
    EmpathyChat           *chat;

    priv = GET_PRIV (window);

    chat = priv->current_chat;
    new_window = empathy_chat_window_new ();

    empathy_chat_window_move_chat (window, new_window, chat);

    priv = GET_PRIV (new_window);
    gtk_widget_show (priv->dialog);
}

static void
chat_window_help_contents_activate_cb (GtkAction         *action,
                       EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv = GET_PRIV (window);

    empathy_url_show (priv->dialog, "ghelp:empathy?chat");
}

static void
chat_window_help_about_activate_cb (GtkAction         *action,
                    EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv = GET_PRIV (window);

    empathy_about_dialog_new (GTK_WINDOW (priv->dialog));
}

static gboolean
chat_window_delete_event_cb (GtkWidget        *dialog,
                 GdkEvent         *event,
                 EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv = GET_PRIV (window);

    DEBUG ("Delete event received");

    g_object_ref (window);
    while (priv->chats) {
        empathy_chat_window_remove_chat (window, priv->chats->data);
    }
    g_object_unref (window);

    return TRUE;
}

static void
chat_window_composing_cb (EmpathyChat       *chat,
              gboolean          is_composing,
              EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;

    priv = GET_PRIV (window);

    if (is_composing && !g_list_find (priv->chats_composing, chat)) {
        priv->chats_composing = g_list_prepend (priv->chats_composing, chat);
    } else {
        priv->chats_composing = g_list_remove (priv->chats_composing, chat);
    }

    chat_window_update_chat_tab (chat);
}

static void
chat_window_set_urgency_hint (EmpathyChatWindow *window,
                  gboolean          urgent)
{
    EmpathyChatWindowPriv *priv;

    priv = GET_PRIV (window);

    DEBUG ("Turning %s urgency hint", urgent ? "on" : "off");
    gtk_window_set_urgency_hint (GTK_WINDOW (priv->dialog), urgent);
}

typedef struct {
    EmpathyChatWindow *window;
    EmpathyChat *chat;
} NotificationData;

static void
chat_window_notification_closed_cb (NotifyNotification *notify,
                    NotificationData *cb_data)
{
    EmpathyNotificationClosedReason reason = 0;
    EmpathyChatWindowPriv *priv = GET_PRIV (cb_data->window);

#ifdef notify_notification_get_closed_reason
    reason = notify_notification_get_closed_reason (notify);
#endif
    if (reason == EMPATHY_NOTIFICATION_CLOSED_DISMISSED) {
        empathy_chat_window_present_chat (cb_data->chat);
    }

    g_object_unref (notify);
    priv->notification = NULL;
    g_object_unref (cb_data->chat);
    g_slice_free (NotificationData, cb_data);
}

static void
chat_window_show_or_update_notification (EmpathyChatWindow *window,
                     EmpathyMessage *message,
                     EmpathyChat *chat)
{
    EmpathyContact *sender;
    const gchar *header;
    char *escaped;
    const char *body;
    GdkPixbuf *pixbuf;
    NotificationData *cb_data;
    EmpathyChatWindowPriv *priv = GET_PRIV (window);
    gboolean res;

    if (!empathy_notification_is_enabled ()) {
        return;
    } else {
        empathy_conf_get_bool (empathy_conf_get (),
                       EMPATHY_PREFS_NOTIFICATIONS_FOCUS, &res);
        if (!res) {
            return;
        }
    }

    cb_data = g_slice_new0 (NotificationData);
    cb_data->chat = g_object_ref (chat);
    cb_data->window = window;

    sender = empathy_message_get_sender (message);
    header = empathy_contact_get_name (sender);
    body = empathy_message_get_body (message);
    escaped = g_markup_escape_text (body, -1);

    pixbuf = empathy_misc_get_pixbuf_for_notification (sender, EMPATHY_IMAGE_NEW_MESSAGE);

    if (priv->notification != NULL) {
        notify_notification_update (priv->notification,
                        header, escaped, NULL);
        /* if icon doesn't exist libnotify will crash */
        if (pixbuf != NULL)
            notify_notification_set_icon_from_pixbuf (priv->notification, pixbuf);
    } else {
        priv->notification = notify_notification_new (header, escaped, NULL, NULL);
        notify_notification_set_timeout (priv->notification, NOTIFY_EXPIRES_DEFAULT);
        /* if icon doesn't exist libnotify will crash */
        if (pixbuf != NULL)
            notify_notification_set_icon_from_pixbuf (priv->notification, pixbuf);

        g_signal_connect (priv->notification, "closed",
                  G_CALLBACK (chat_window_notification_closed_cb), cb_data);
    }

    notify_notification_show (priv->notification, NULL);

    g_object_unref (pixbuf);
    g_free (escaped);
}

static void
chat_window_new_message_cb (EmpathyChat       *chat,
                EmpathyMessage    *message,
                EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;
    gboolean              has_focus;
    gboolean              needs_urgency;
    EmpathyContact        *sender;

    priv = GET_PRIV (window);

    has_focus = empathy_chat_window_has_focus (window);

    /* - if we're the sender, we play the sound if it's specified in the
     *   preferences and we're not away.
     * - if we receive a message, we play the sound if it's specified in the
     *   preferences and the window does not have focus on the chat receiving
     *   the message.
     */

    sender = empathy_message_get_sender (message);

    if (empathy_contact_is_user (sender)) {
        empathy_sound_play (GTK_WIDGET (priv->dialog),
                    EMPATHY_SOUND_MESSAGE_OUTGOING);
    }

    if (has_focus && priv->current_chat == chat) {
        return;
    }

    /* If empathy_chat_is_room () returns TRUE, that means it's a named MUC.
     * If empathy_chat_get_remote_contact () returns NULL, that means it's
     * an unamed MUC (msn-like).
     * In case of a MUC, we set urgency only if the message contains our
     * alias. */
    if (empathy_chat_is_room (chat) ||
        empathy_chat_get_remote_contact (chat) == NULL) {
        needs_urgency = empathy_message_should_highlight (message);
    } else {
        needs_urgency = TRUE;
    }

    if (needs_urgency) {
        if (!has_focus)
            chat_window_set_urgency_hint (window, TRUE);

        empathy_sound_play (GTK_WIDGET (priv->dialog),
            EMPATHY_SOUND_MESSAGE_INCOMING);
        chat_window_show_or_update_notification (window, message, chat);
    }

    if (!g_list_find (priv->chats_new_msg, chat)) {
        priv->chats_new_msg = g_list_prepend (priv->chats_new_msg, chat);
        chat_window_update_chat_tab (chat);
    }
}

static GtkNotebook *
chat_window_detach_hook (GtkNotebook *source,
             GtkWidget   *page,
             gint         x,
             gint         y,
             gpointer     user_data)
{
    EmpathyChatWindowPriv *priv;
    EmpathyChatWindow     *window, *new_window;
    EmpathyChat           *chat;

    chat = EMPATHY_CHAT (page);
    window = chat_window_find_chat (chat);

    new_window = empathy_chat_window_new ();
    priv = GET_PRIV (new_window);

    DEBUG ("Detach hook called");

    empathy_chat_window_move_chat (window, new_window, chat);

    gtk_window_move (GTK_WINDOW (priv->dialog), x, y);
    gtk_widget_show (priv->dialog);

    return NULL;
}

static void
chat_window_page_switched_cb (GtkNotebook      *notebook,
                  GtkNotebookPage  *page,
                  gint          page_num,
                  EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;
    EmpathyChat           *chat;
    GtkWidget            *child;

    DEBUG ("Page switched");

    priv = GET_PRIV (window);

    child = gtk_notebook_get_nth_page (notebook, page_num);
    chat = EMPATHY_CHAT (child);

    if (priv->page_added) {
        priv->page_added = FALSE;
        empathy_chat_scroll_down (chat);
    }
    else if (priv->current_chat == chat) {
        return;
    }

    priv->current_chat = chat;
    priv->chats_new_msg = g_list_remove (priv->chats_new_msg, chat);

    chat_window_update_chat_tab (chat);
}

static void
chat_window_page_added_cb (GtkNotebook      *notebook,
               GtkWidget        *child,
               guint             page_num,
               EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;
    EmpathyChat           *chat;

    priv = GET_PRIV (window);

    /* If we just received DND to the same window, we don't want
     * to do anything here like removing the tab and then readding
     * it, so we return here and in "page-added".
     */
    if (priv->dnd_same_window) {
        DEBUG ("Page added (back to the same window)");
        priv->dnd_same_window = FALSE;
        return;
    }

    DEBUG ("Page added");

    /* Get chat object */
    chat = EMPATHY_CHAT (child);

    /* Connect chat signals for this window */
    g_signal_connect (chat, "composing",
              G_CALLBACK (chat_window_composing_cb),
              window);
    g_signal_connect (chat, "new-message",
              G_CALLBACK (chat_window_new_message_cb),
              window);

    /* Set flag so we know to perform some special operations on
     * switch page due to the new page being added.
     */
    priv->page_added = TRUE;

    /* Get list of chats up to date */
    priv->chats = g_list_append (priv->chats, chat);

    chat_window_update_chat_tab (chat);
}

static void
chat_window_page_removed_cb (GtkNotebook      *notebook,
                 GtkWidget        *child,
                 guint             page_num,
                 EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;
    EmpathyChat           *chat;

    priv = GET_PRIV (window);

    /* If we just received DND to the same window, we don't want
     * to do anything here like removing the tab and then readding
     * it, so we return here and in "page-added".
     */
    if (priv->dnd_same_window) {
        DEBUG ("Page removed (and will be readded to same window)");
        return;
    }

    DEBUG ("Page removed");

    /* Get chat object */
    chat = EMPATHY_CHAT (child);

    /* Disconnect all signal handlers for this chat and this window */
    g_signal_handlers_disconnect_by_func (chat,
                          G_CALLBACK (chat_window_composing_cb),
                          window);
    g_signal_handlers_disconnect_by_func (chat,
                          G_CALLBACK (chat_window_new_message_cb),
                          window);

    /* Keep list of chats up to date */
    priv->chats = g_list_remove (priv->chats, chat);
    priv->chats_new_msg = g_list_remove (priv->chats_new_msg, chat);
    priv->chats_composing = g_list_remove (priv->chats_composing, chat);

    if (priv->chats == NULL) {
        g_object_unref (window);
    } else {
        chat_window_update (window);
    }
}

static gboolean
chat_window_focus_in_event_cb (GtkWidget        *widget,
                   GdkEvent         *event,
                   EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;

    DEBUG ("Focus in event, updating title");

    priv = GET_PRIV (window);

    priv->chats_new_msg = g_list_remove (priv->chats_new_msg, priv->current_chat);

    chat_window_set_urgency_hint (window, FALSE);

    /* Update the title, since we now mark all unread messages as read. */
    chat_window_update_chat_tab (priv->current_chat);

    return FALSE;
}

static void
chat_window_drag_data_received (GtkWidget        *widget,
                GdkDragContext   *context,
                int               x,
                int               y,
                GtkSelectionData *selection,
                guint             info,
                guint             time,
                EmpathyChatWindow *window)
{
    if (info == DND_DRAG_TYPE_CONTACT_ID) {
        EmpathyChat           *chat;
        EmpathyChatWindow     *old_window;
        EmpathyAccount        *account;
        EmpathyAccountManager *account_manager;
        const gchar           *id;
        gchar                **strv;
        const gchar           *account_id;
        const gchar           *contact_id;

        id = (const gchar*) gtk_selection_data_get_data (selection);
        account_manager = empathy_account_manager_dup_singleton ();

        DEBUG ("DND contact from roster with id:'%s'", id);

        strv = g_strsplit (id, "/", 2);
        account_id = strv[0];
        contact_id = strv[1];
        account = empathy_account_manager_lookup (account_manager, account_id);
        chat = empathy_chat_window_find_chat (account, contact_id);

        if (!chat) {
            TpConnection *connection;

            connection = empathy_account_get_connection (account);

            if (connection) {
                empathy_dispatcher_chat_with_contact_id (
                    connection, contact_id, NULL, NULL);
            }

            g_object_unref (account);
            g_strfreev (strv);
            return;
        }
        g_object_unref (account);
        g_object_unref (account_manager);
        g_strfreev (strv);

        old_window = chat_window_find_chat (chat);
        if (old_window) {
            if (old_window == window) {
                gtk_drag_finish (context, TRUE, FALSE, time);
                return;
            }

            empathy_chat_window_move_chat (old_window, window, chat);
        } else {
            empathy_chat_window_add_chat (window, chat);
        }

        /* Added to take care of any outstanding chat events */
        empathy_chat_window_present_chat (chat);

        /* We should return TRUE to remove the data when doing
         * GDK_ACTION_MOVE, but we don't here otherwise it has
         * weird consequences, and we handle that internally
         * anyway with add_chat () and remove_chat ().
         */
        gtk_drag_finish (context, TRUE, FALSE, time);
    }
    else if (info == DND_DRAG_TYPE_TAB) {
        EmpathyChat        **chat;
        EmpathyChatWindow   *old_window = NULL;

        DEBUG ("DND tab");

        chat = (void *) gtk_selection_data_get_data (selection);
        old_window = chat_window_find_chat (*chat);

        if (old_window) {
            EmpathyChatWindowPriv *priv;

            priv = GET_PRIV (window);

            if (old_window == window) {
                DEBUG ("DND tab (within same window)");
                priv->dnd_same_window = TRUE;
                gtk_drag_finish (context, TRUE, FALSE, time);
                return;
            }

            priv->dnd_same_window = FALSE;
        }

        /* We should return TRUE to remove the data when doing
         * GDK_ACTION_MOVE, but we don't here otherwise it has
         * weird consequences, and we handle that internally
         * anyway with add_chat () and remove_chat ().
         */
        gtk_drag_finish (context, TRUE, FALSE, time);
    } else {
        DEBUG ("DND from unknown source");
        gtk_drag_finish (context, FALSE, FALSE, time);
    }
}

static void
chat_window_finalize (GObject *object)
{
    EmpathyChatWindow     *window;
    EmpathyChatWindowPriv *priv;

    window = EMPATHY_CHAT_WINDOW (object);
    priv = GET_PRIV (window);

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

    g_object_unref (priv->ui_manager);
    g_object_unref (priv->chatroom_manager);
    if (priv->save_geometry_id != 0) {
        g_source_remove (priv->save_geometry_id);
    }

    if (priv->notification != NULL) {
        notify_notification_close (priv->notification, NULL);
        g_object_unref (priv->notification);
        priv->notification = NULL;
    }

    chat_windows = g_list_remove (chat_windows, window);
    gtk_widget_destroy (priv->dialog);

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

static void
empathy_chat_window_class_init (EmpathyChatWindowClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    object_class->finalize = chat_window_finalize;

    g_type_class_add_private (object_class, sizeof (EmpathyChatWindowPriv));

    /* Set up a style for the close button with no focus padding. */
    gtk_rc_parse_string (
        "style \"empathy-close-button-style\"\n"
        "{\n"
        "  GtkWidget::focus-padding = 0\n"
        "  xthickness = 0\n"
        "  ythickness = 0\n"
        "}\n"
        "widget \"*.empathy-close-button\" style \"empathy-close-button-style\"");

    gtk_notebook_set_window_creation_hook (chat_window_detach_hook, NULL, NULL);
}

static void
empathy_chat_window_init (EmpathyChatWindow *window)
{
    GtkBuilder            *gui;
    GtkAccelGroup         *accel_group;
    GClosure              *closure;
    GtkWidget             *menu;
    GtkWidget             *submenu;
    gint                   i;
    GtkWidget             *chat_vbox;
    gchar                 *filename;
    EmpathySmileyManager  *smiley_manager;
    EmpathyChatWindowPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (window,
        EMPATHY_TYPE_CHAT_WINDOW, EmpathyChatWindowPriv);

    window->priv = priv;
    filename = empathy_file_lookup ("empathy-chat-window.ui", "src");
    gui = empathy_builder_get_file (filename,
                       "chat_window", &priv->dialog,
                       "chat_vbox", &chat_vbox,
                       "ui_manager", &priv->ui_manager,
                       "menu_conv_insert_smiley", &priv->menu_conv_insert_smiley,
                       "menu_conv_favorite", &priv->menu_conv_favorite,
                       "menu_conv_toggle_contacts", &priv->menu_conv_toggle_contacts,
                       "menu_edit_cut", &priv->menu_edit_cut,
                       "menu_edit_copy", &priv->menu_edit_copy,
                       "menu_edit_paste", &priv->menu_edit_paste,
                       "menu_tabs_next", &priv->menu_tabs_next,
                       "menu_tabs_prev", &priv->menu_tabs_prev,
                       "menu_tabs_left", &priv->menu_tabs_left,
                       "menu_tabs_right", &priv->menu_tabs_right,
                       "menu_tabs_detach", &priv->menu_tabs_detach,
                       NULL);
    g_free (filename);

    empathy_builder_connect (gui, window,
                  "chat_window", "configure-event", chat_window_configure_event_cb,
                  "menu_conv", "activate", chat_window_conv_activate_cb,
                  "menu_conv_clear", "activate", chat_window_clear_activate_cb,
                  "menu_conv_favorite", "toggled", chat_window_favorite_toggled_cb,
                  "menu_conv_toggle_contacts", "toggled", chat_window_contacts_toggled_cb,
                  "menu_conv_close", "activate", chat_window_close_activate_cb,
                  "menu_edit", "activate", chat_window_edit_activate_cb,
                  "menu_edit_cut", "activate", chat_window_cut_activate_cb,
                  "menu_edit_copy", "activate", chat_window_copy_activate_cb,
                  "menu_edit_paste", "activate", chat_window_paste_activate_cb,
                  "menu_tabs_left", "activate", chat_window_tabs_left_activate_cb,
                  "menu_tabs_right", "activate", chat_window_tabs_right_activate_cb,
                  "menu_tabs_detach", "activate", chat_window_detach_activate_cb,
                  "menu_help_contents", "activate", chat_window_help_contents_activate_cb,
                  "menu_help_about", "activate", chat_window_help_about_activate_cb,
                  NULL);

    g_object_ref (priv->ui_manager);
    g_object_unref (gui);

    priv->chatroom_manager = empathy_chatroom_manager_dup_singleton (NULL);

    priv->notebook = gtk_notebook_new ();
    gtk_notebook_set_group (GTK_NOTEBOOK (priv->notebook), "EmpathyChatWindow");
    gtk_notebook_set_scrollable (GTK_NOTEBOOK (priv->notebook), TRUE);
    gtk_notebook_popup_enable (GTK_NOTEBOOK (priv->notebook));
    gtk_box_pack_start (GTK_BOX (chat_vbox), priv->notebook, TRUE, TRUE, 0);
    gtk_widget_show (priv->notebook);

    /* Set up accels */
    accel_group = gtk_accel_group_new ();
    gtk_window_add_accel_group (GTK_WINDOW (priv->dialog), accel_group);

    for (i = 0; i < G_N_ELEMENTS (tab_accel_keys); i++) {
        closure =  g_cclosure_new (G_CALLBACK (chat_window_accel_cb),
                       window,
                       NULL);
        gtk_accel_group_connect (accel_group,
                     tab_accel_keys[i],
                     GDK_MOD1_MASK,
                     0,
                     closure);
    }

    g_object_unref (accel_group);

    /* Set up smiley menu */
    smiley_manager = empathy_smiley_manager_dup_singleton ();
    submenu = empathy_smiley_menu_new (smiley_manager,
                       chat_window_insert_smiley_activate_cb,
                       window);
    menu = gtk_ui_manager_get_widget (priv->ui_manager,
        "/chats_menubar/menu_conv/menu_conv_insert_smiley");
    gtk_menu_item_set_submenu (GTK_MENU_ITEM (menu), submenu);
    g_object_unref (smiley_manager);

    /* Set up signals we can't do with ui file since we may need to
     * block/unblock them at some later stage.
     */

    g_signal_connect (priv->dialog,
              "delete_event",
              G_CALLBACK (chat_window_delete_event_cb),
              window);

    g_signal_connect_swapped (priv->menu_tabs_prev,
                  "activate",
                  G_CALLBACK (gtk_notebook_prev_page),
                  priv->notebook);
    g_signal_connect_swapped (priv->menu_tabs_next,
                  "activate",
                  G_CALLBACK (gtk_notebook_next_page),
                  priv->notebook);

    g_signal_connect (priv->dialog,
              "focus_in_event",
              G_CALLBACK (chat_window_focus_in_event_cb),
              window);
    g_signal_connect_after (priv->notebook,
                "switch_page",
                G_CALLBACK (chat_window_page_switched_cb),
                window);
    g_signal_connect (priv->notebook,
              "page_added",
              G_CALLBACK (chat_window_page_added_cb),
              window);
    g_signal_connect (priv->notebook,
              "page_removed",
              G_CALLBACK (chat_window_page_removed_cb),
              window);

    /* Set up drag and drop */
    gtk_drag_dest_set (GTK_WIDGET (priv->notebook),
               GTK_DEST_DEFAULT_ALL,
               drag_types_dest,
               G_N_ELEMENTS (drag_types_dest),
               GDK_ACTION_MOVE);

    g_signal_connect (priv->notebook,
              "drag-data-received",
              G_CALLBACK (chat_window_drag_data_received),
              window);

    chat_windows = g_list_prepend (chat_windows, window);

    /* Set up private details */
    priv->chats = NULL;
    priv->chats_new_msg = NULL;
    priv->chats_composing = NULL;
    priv->current_chat = NULL;
}

EmpathyChatWindow *
empathy_chat_window_new (void)
{
    return EMPATHY_CHAT_WINDOW (g_object_new (EMPATHY_TYPE_CHAT_WINDOW, NULL));
}

/* Returns the window to open a new tab in if there is only one window
 * visble, otherwise, returns NULL indicating that a new window should
 * be added.
 */
EmpathyChatWindow *
empathy_chat_window_get_default (void)
{
    GList    *l;
    gboolean  separate_windows = TRUE;

    empathy_conf_get_bool (empathy_conf_get (),
                  EMPATHY_PREFS_UI_SEPARATE_CHAT_WINDOWS,
                  &separate_windows);

    if (separate_windows) {
        /* Always create a new window */
        return NULL;
    }

    for (l = chat_windows; l; l = l->next) {
        EmpathyChatWindow *chat_window;
        GtkWidget         *dialog;

        chat_window = l->data;

        dialog = empathy_chat_window_get_dialog (chat_window);
        if (empathy_window_get_is_visible (GTK_WINDOW (dialog))) {
            /* Found a visible window on this desktop */
            return chat_window;
        }
    }

    return NULL;
}

GtkWidget *
empathy_chat_window_get_dialog (EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;

    g_return_val_if_fail (window != NULL, NULL);

    priv = GET_PRIV (window);

    return priv->dialog;
}

void
empathy_chat_window_add_chat (EmpathyChatWindow *window,
                  EmpathyChat   *chat)
{
    EmpathyChatWindowPriv *priv;
    GtkWidget             *label;
    GtkWidget             *popup_label;
    GtkWidget             *child;
    gint                   x, y, w, h;

    g_return_if_fail (window != NULL);
    g_return_if_fail (EMPATHY_IS_CHAT (chat));

    priv = GET_PRIV (window);

    /* Reference the chat object */
    g_object_ref (chat);

    /* If this window has just been created, position it */
    if (priv->chats == NULL) {
        empathy_geometry_load (chat_get_window_id_for_geometry (chat), &x, &y, &w, &h);

        if (x >= 0 && y >= 0) {
            /* Let the window manager position it if we don't have
             * good x, y coordinates.
             */
            gtk_window_move (GTK_WINDOW (priv->dialog), x, y);
        }

        if (w > 0 && h > 0) {
            /* Use the defaults from the ui file if we don't have
             * good w, h geometry.
             */
            gtk_window_resize (GTK_WINDOW (priv->dialog), w, h);
        }
    }

    child = GTK_WIDGET (chat);
    label = chat_window_create_label (window, chat, TRUE);
    popup_label = chat_window_create_label (window, chat, FALSE);
    gtk_widget_show (child);

    g_signal_connect (chat, "notify::name",
              G_CALLBACK (chat_window_chat_notify_cb),
              NULL);
    g_signal_connect (chat, "notify::subject",
              G_CALLBACK (chat_window_chat_notify_cb),
              NULL);
    g_signal_connect (chat, "notify::remote-contact",
              G_CALLBACK (chat_window_chat_notify_cb),
              NULL);
    chat_window_chat_notify_cb (chat);

    gtk_notebook_append_page_menu (GTK_NOTEBOOK (priv->notebook), child, label, popup_label);
    gtk_notebook_set_tab_reorderable (GTK_NOTEBOOK (priv->notebook), child, TRUE);
    gtk_notebook_set_tab_detachable (GTK_NOTEBOOK (priv->notebook), child, TRUE);
    gtk_notebook_set_tab_label_packing (GTK_NOTEBOOK (priv->notebook), child,
                        TRUE, TRUE, GTK_PACK_START);

    DEBUG ("Chat added (%d references)", G_OBJECT (chat)->ref_count);
}

void
empathy_chat_window_remove_chat (EmpathyChatWindow *window,
                 EmpathyChat       *chat)
{
    EmpathyChatWindowPriv *priv;
    gint                   position;
    EmpathyContact        *remote_contact;

    g_return_if_fail (window != NULL);
    g_return_if_fail (EMPATHY_IS_CHAT (chat));

    priv = GET_PRIV (window);

    g_signal_handlers_disconnect_by_func (chat,
                          chat_window_chat_notify_cb,
                          NULL);
    remote_contact = g_object_get_data (G_OBJECT (chat),
                        "chat-window-remote-contact");
    if (remote_contact) {
        g_signal_handlers_disconnect_by_func (remote_contact,
                              chat_window_update_chat_tab,
                              chat);
    }

    position = gtk_notebook_page_num (GTK_NOTEBOOK (priv->notebook),
                      GTK_WIDGET (chat));
    gtk_notebook_remove_page (GTK_NOTEBOOK (priv->notebook), position);

    DEBUG ("Chat removed (%d references)", G_OBJECT (chat)->ref_count - 1);

    g_object_unref (chat);
}

void
empathy_chat_window_move_chat (EmpathyChatWindow *old_window,
                   EmpathyChatWindow *new_window,
                   EmpathyChat       *chat)
{
    GtkWidget *widget;

    g_return_if_fail (EMPATHY_IS_CHAT_WINDOW (old_window));
    g_return_if_fail (EMPATHY_IS_CHAT_WINDOW (new_window));
    g_return_if_fail (EMPATHY_IS_CHAT (chat));

    widget = GTK_WIDGET (chat);

    DEBUG ("Chat moving with widget:%p (%d references)", widget,
        G_OBJECT (widget)->ref_count);

    /* We reference here to make sure we don't loose the widget
     * and the EmpathyChat object during the move.
     */
    g_object_ref (chat);
    g_object_ref (widget);

    empathy_chat_window_remove_chat (old_window, chat);
    empathy_chat_window_add_chat (new_window, chat);

    g_object_unref (widget);
    g_object_unref (chat);
}

void
empathy_chat_window_switch_to_chat (EmpathyChatWindow *window,
                    EmpathyChat       *chat)
{
    EmpathyChatWindowPriv *priv;
    gint                  page_num;

    g_return_if_fail (window != NULL);
    g_return_if_fail (EMPATHY_IS_CHAT (chat));

    priv = GET_PRIV (window);

    page_num = gtk_notebook_page_num (GTK_NOTEBOOK (priv->notebook),
                      GTK_WIDGET (chat));
    gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->notebook),
                       page_num);
}

gboolean
empathy_chat_window_has_focus (EmpathyChatWindow *window)
{
    EmpathyChatWindowPriv *priv;
    gboolean              has_focus;

    g_return_val_if_fail (EMPATHY_IS_CHAT_WINDOW (window), FALSE);

    priv = GET_PRIV (window);

    g_object_get (priv->dialog, "has-toplevel-focus", &has_focus, NULL);

    return has_focus;
}

EmpathyChat *
empathy_chat_window_find_chat (EmpathyAccount   *account,
                   const gchar *id)
{
    GList *l;

    g_return_val_if_fail (!EMP_STR_EMPTY (id), NULL);

    for (l = chat_windows; l; l = l->next) {
        EmpathyChatWindowPriv *priv;
        EmpathyChatWindow     *window;
        GList                *ll;

        window = l->data;
        priv = GET_PRIV (window);

        for (ll = priv->chats; ll; ll = ll->next) {
            EmpathyChat *chat;

            chat = ll->data;

            if (empathy_account_equal (account, empathy_chat_get_account (chat)) &&
                !tp_strdiff (id, empathy_chat_get_id (chat))) {
                return chat;
            }
        }
    }

    return NULL;
}

void
empathy_chat_window_present_chat (EmpathyChat *chat)
{
    EmpathyChatWindow     *window;
    EmpathyChatWindowPriv *priv;

    g_return_if_fail (EMPATHY_IS_CHAT (chat));

    window = chat_window_find_chat (chat);

    /* If the chat has no window, create one */
    if (window == NULL) {
        window = empathy_chat_window_get_default ();
        if (!window) {
            window = empathy_chat_window_new ();
        }

        empathy_chat_window_add_chat (window, chat);
    }

    priv = GET_PRIV (window);
    empathy_chat_window_switch_to_chat (window, chat);
    empathy_window_present (GTK_WINDOW (priv->dialog), TRUE);

    gtk_widget_grab_focus (chat->input_text_view);
}