path: root/src/ephy-notebook.c

/*
 *  Copyright (C) 2002 Christophe Fergeau
 *
 *  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, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "ephy-notebook.h"
#include "eel-gconf-extensions.h"
#include "ephy-prefs.h"
#include "ephy-marshal.h"
#include "ephy-file-helpers.h"
#include "ephy-dnd.h"
#include "ephy-embed.h"
#include "ephy-window.h"
#include "ephy-shell.h"

#include <gtk/gtk.h>
#include <glib-object.h>
#include <bonobo/bonobo-i18n.h>
#include <libgnomevfs/gnome-vfs-uri.h>

#define AFTER_ALL_TABS -1
#define NOT_IN_APP_WINDOWS -2
#define TAB_MIN_SIZE 60
#define TAB_NB_MAX    8

struct EphyNotebookPrivate
{
    GList *focused_pages;
    GList *opened_tabs;

    EphyNotebookPageLoadStatus current_status;

    GtkTooltips *title_tips;

    /* Used during tab drag'n'drop */
    gulong motion_notify_handler_id;
    gint x_start, y_start;
    gboolean drag_in_progress;
    EphyNotebook *src_notebook;
    gint src_page;
};

/* GObject boilerplate code */
static void ephy_notebook_init         (EphyNotebook *notebook);
static void ephy_notebook_class_init   (EphyNotebookClass *klass);
static void ephy_notebook_finalize     (GObject *object);

/* Local variables */
static GdkCursor *cursor = NULL;
static GList *notebooks  = NULL;

static GtkTargetEntry url_drag_types [] = 
{
        { EPHY_DND_URI_LIST_TYPE,   0, 0 },
        { EPHY_DND_URL_TYPE,        0, 1 }
};
static guint n_url_drag_types = G_N_ELEMENTS (url_drag_types);

/* Local functions */
static void drag_start (EphyNotebook *notebook,
            EphyNotebook *src_notebook,
            gint src_page);
static void drag_stop  (EphyNotebook *notebook);

static gboolean motion_notify_cb (EphyNotebook *notebook,
                  GdkEventMotion *event,
                  gpointer data);

/* Signals */
enum
{
    TAB_DROPPED,
    TAB_DETACHED,
    TABS_CHANGED,
    LAST_SIGNAL
};

static guint ephy_notebook_signals[LAST_SIGNAL] = { 0 };

GType
ephy_notebook_get_type (void)
{
        static GType ephy_notebook_type = 0;

        if (ephy_notebook_type == 0)
        {
                static const GTypeInfo our_info =
            {
                sizeof (EphyNotebookClass),
                NULL, /* base_init */
                NULL, /* base_finalize */
                (GClassInitFunc) ephy_notebook_class_init,
                NULL,
                NULL, /* class_data */
                sizeof (EphyNotebook),
                0, /* n_preallocs */
                (GInstanceInitFunc) ephy_notebook_init
            };

                ephy_notebook_type = g_type_register_static (GTK_TYPE_NOTEBOOK,
                                 "EphyNotebook",
                                 &our_info, 0);
        }

        return ephy_notebook_type;
}

static void
ephy_notebook_class_init (EphyNotebookClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);
    object_class->finalize = ephy_notebook_finalize;

    /* init signals */
    ephy_notebook_signals[TAB_DROPPED] =
        g_signal_new ("tab_dropped",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EphyNotebookClass, tab_dropped),
                  NULL, NULL,
                  ephy_marshal_VOID__OBJECT_OBJECT_INT,
                  G_TYPE_NONE,
                  3,
                  GTK_TYPE_WIDGET,
                  EPHY_NOTEBOOK_TYPE,
                  G_TYPE_INT);
    ephy_notebook_signals[TAB_DETACHED] =
        g_signal_new ("tab_detached",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EphyNotebookClass, tab_detached),
                  NULL, NULL,
                  ephy_marshal_VOID__INT_INT_INT,
                  G_TYPE_NONE,
                  3,
                  G_TYPE_INT,
                  G_TYPE_INT,
                  G_TYPE_INT);
    ephy_notebook_signals[TABS_CHANGED] =
        g_signal_new ("tabs_changed",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (EphyNotebookClass, tabs_changed),
                  NULL, NULL,
                  ephy_marshal_VOID__VOID,
                  G_TYPE_NONE, 0);
}

static gboolean
is_in_notebook_window (EphyNotebook *notebook,
               gint abs_x, gint abs_y)
{
    gint x, y;
    gint rel_x, rel_y;
    gint width, height;
    GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET(notebook));
    GdkWindow *window = GTK_WIDGET(toplevel)->window;

    gdk_window_get_origin (window, &x, &y);
    rel_x = abs_x - x;
    rel_y = abs_y - y;

    x = GTK_WIDGET(notebook)->allocation.x;
    y = GTK_WIDGET(notebook)->allocation.y;
    height = GTK_WIDGET(notebook)->allocation.height;
    width  = GTK_WIDGET(notebook)->allocation.width;
    return ((rel_x>=x) && (rel_y>=y) && (rel_x<=x+width) && (rel_y<=y+height));
}

static EphyNotebook *
find_notebook_at_pointer (gint abs_x, gint abs_y)
{
    GList *l;
    gint x, y;
    GdkWindow *win_at_pointer = gdk_window_at_pointer (&x, &y);
    GdkWindow *parent_at_pointer = NULL;

    if (win_at_pointer == NULL)
    {
        /* We are outside all windows containing a notebook */
        return NULL;
    }

    gdk_window_get_toplevel (win_at_pointer);
    /* When we are in the notebook event window, win_at_pointer will be
       this event window, and the toplevel window we are interested in
       will be its parent
    */
    parent_at_pointer = gdk_window_get_parent (win_at_pointer);

    for (l = notebooks; l != NULL; l = l->next)
    {
        EphyNotebook *nb = EPHY_NOTEBOOK (l->data);
        GdkWindow *win = GTK_WIDGET (nb)->window;

        win = gdk_window_get_toplevel (win);
        if (((win == win_at_pointer) || (win == parent_at_pointer))
            && is_in_notebook_window (nb, abs_x, abs_y))
        {
            return nb;
        }
    }
    return NULL;
}


static gint
find_tab_num_at_pos (EphyNotebook *notebook, gint abs_x, gint abs_y)
{
    GtkPositionType tab_pos;
    int page_num = 0;
    GtkNotebook *nb = GTK_NOTEBOOK (notebook);
    GtkWidget *page;

    tab_pos = gtk_notebook_get_tab_pos (GTK_NOTEBOOK (notebook));

    if (GTK_NOTEBOOK (notebook)->first_tab == NULL)
    {
        return AFTER_ALL_TABS;
    }

    g_assert (is_in_notebook_window(notebook, abs_x, abs_y));

    while ((page = gtk_notebook_get_nth_page (nb, page_num)))
    {
        GtkWidget *tab;
        gint max_x, max_y;
        gint x_root, y_root;

        tab = gtk_notebook_get_tab_label (nb, page);
        g_return_val_if_fail (tab != NULL, -1);

        if (!GTK_WIDGET_MAPPED (GTK_WIDGET (tab)))
        {
            page_num++;
            continue;
        }

        gdk_window_get_origin (GDK_WINDOW (tab->window),
                       &x_root, &y_root);

        max_x = x_root + tab->allocation.x + tab->allocation.width;
        max_y = y_root + tab->allocation.y + tab->allocation.height;

        if (((tab_pos == GTK_POS_TOP)
             || (tab_pos == GTK_POS_BOTTOM))
            &&(abs_x<=max_x))
        {
            return page_num;
        }
        else if (((tab_pos == GTK_POS_LEFT)
              || (tab_pos == GTK_POS_RIGHT))
             && (abs_y<=max_y))
        {
            return page_num;
        }

        page_num++;
    }
    return AFTER_ALL_TABS;
}


static gint find_notebook_and_tab_at_pos (gint abs_x, gint abs_y,
                      EphyNotebook **notebook,
                      gint *page_num)
{
    *notebook = find_notebook_at_pointer (abs_x, abs_y);
    if (*notebook == NULL)
    {
        return NOT_IN_APP_WINDOWS;
    }
    *page_num = find_tab_num_at_pos (*notebook, abs_x, abs_y);

    if (*page_num < 0)
    {
        return *page_num;
    }
    else
    {
        return 0;
    }
}

static void
tab_label_set_size (GtkWidget *window, GtkWidget *label)
{
    int label_width;

    label_width = window->allocation.width/TAB_NB_MAX;

    if (label_width < TAB_MIN_SIZE) label_width = TAB_MIN_SIZE;

    gtk_widget_set_size_request (label, label_width, -1);
}

static void
tab_label_size_request_cb (GtkWidget *window,
               GtkRequisition *requisition,
               GtkWidget *child)
{
    GtkWidget *hbox;
    GtkWidget *nb;

    nb = child->parent;

    hbox = gtk_notebook_get_tab_label (GTK_NOTEBOOK (nb),
                       child);
    tab_label_set_size (window, hbox);
}


void
ephy_notebook_move_page (EphyNotebook *src, EphyNotebook *dest,
             GtkWidget *src_page,  gint dest_page)
{
    GtkWidget *tab_label;

    if (dest == NULL || src == dest)
    {
        gtk_notebook_reorder_child (GTK_NOTEBOOK (src), src_page, dest_page);
        g_signal_emit (G_OBJECT (src), ephy_notebook_signals[TABS_CHANGED], 0);
    }
    else
    {
        tab_label = gtk_notebook_get_tab_label (GTK_NOTEBOOK (src), src_page);

        /* We don't want gtk to destroy tab and src_page behind our back */
        g_object_ref (G_OBJECT (src_page));
        g_object_ref (G_OBJECT (tab_label));
        ephy_notebook_remove_page (EPHY_NOTEBOOK (src), src_page);
        ephy_notebook_insert_page (EPHY_NOTEBOOK (dest), src_page,
                      dest_page, TRUE);
        gtk_notebook_set_tab_label (GTK_NOTEBOOK (dest), src_page, tab_label);
        g_object_unref (G_OBJECT (src_page));
        g_object_unref (G_OBJECT (tab_label));
    }
}



static void
move_tab_to_another_notebook(EphyNotebook *src,
                 EphyNotebook *dest, gint dest_page)
{
    GtkWidget *child;
    gint cur_page;

    /* This is getting tricky, the tab was dragged in a notebook
     * in another window of the same app, we move the tab
     * to that new notebook, and let this notebook handle the
     * drag
    */
    g_assert (dest != NULL);
    g_assert (dest != src);

    /* Move the widgets (tab label and tab content) to the new
     * notebook
     */
    cur_page = gtk_notebook_get_current_page (GTK_NOTEBOOK (src));
    child    = gtk_notebook_get_nth_page (GTK_NOTEBOOK (src), cur_page);
    ephy_notebook_move_page (src, dest, child, dest_page);

    /* "Give" drag handling to the new notebook */
    drag_start (dest, src->priv->src_notebook, src->priv->src_page);
    drag_stop (src);
    gtk_grab_remove (GTK_WIDGET (src));

    dest->priv->motion_notify_handler_id =
        g_signal_connect (G_OBJECT (dest),
                  "motion-notify-event",
                  G_CALLBACK (motion_notify_cb),
                  NULL);
}


static void
move_tab (EphyNotebook *notebook, gint dest_page_num)
{
    gint cur_page_num;

    cur_page_num = gtk_notebook_get_current_page (GTK_NOTEBOOK (notebook));

    if (dest_page_num != cur_page_num)
    {
        GtkWidget *cur_page;
        cur_page = gtk_notebook_get_nth_page (GTK_NOTEBOOK (notebook),
                              cur_page_num);
        ephy_notebook_move_page (EPHY_NOTEBOOK (notebook), NULL, cur_page,
                     dest_page_num);

        /* Reset the list of newly opened tabs when moving tabs. */
        g_list_free (notebook->priv->opened_tabs);
        notebook->priv->opened_tabs = NULL;
    }
}

static void
drag_start (EphyNotebook *notebook,
        EphyNotebook *src_notebook,
        gint src_page)
{
    notebook->priv->drag_in_progress = TRUE;
    notebook->priv->src_notebook = src_notebook;
    notebook->priv->src_page = src_page;

    /* get a new cursor, if necessary */
    if (!cursor) cursor = gdk_cursor_new (GDK_FLEUR);

    /* grab the pointer */
    gtk_grab_add (GTK_WIDGET (notebook));
    if (!gdk_pointer_is_grabbed ()) {
        gdk_pointer_grab (GDK_WINDOW(GTK_WIDGET (notebook)->window),
                  FALSE,
                  GDK_BUTTON1_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
                  NULL, cursor, GDK_CURRENT_TIME);
    }
}

static void
drag_stop (EphyNotebook *notebook)
{
    notebook->priv->drag_in_progress = FALSE;
    notebook->priv->src_notebook = NULL;
    notebook->priv->src_page = -1;
    if (notebook->priv->motion_notify_handler_id != 0)
    {
        g_signal_handler_disconnect (G_OBJECT (notebook),
                         notebook->priv->motion_notify_handler_id);
        notebook->priv->motion_notify_handler_id = 0;
    }
}

/* Callbacks */
static gboolean
button_release_cb (EphyNotebook *notebook, GdkEventButton *event,
           gpointer data)
{
    if (notebook->priv->drag_in_progress)
    {
        gint cur_page_num;
        GtkWidget *cur_page;

        cur_page_num =
            gtk_notebook_get_current_page (GTK_NOTEBOOK (notebook));
        cur_page = gtk_notebook_get_nth_page (GTK_NOTEBOOK (notebook),
                              cur_page_num);

        if (!is_in_notebook_window (notebook, event->x_root, event->y_root))
        {
            /* Tab was detached */
            g_signal_emit (G_OBJECT(notebook),
                       ephy_notebook_signals[TAB_DETACHED], 0,
                       cur_page_num, (gint)event->x_root,
                       (gint)event->y_root);
        }
        else
        {
            /* Tab was dragged and dropped (but it may have stayed
               in the same place) */
            g_signal_emit (G_OBJECT(notebook),
                       ephy_notebook_signals[TAB_DROPPED], 0,
                       cur_page,
                       notebook->priv->src_notebook,
                       notebook->priv->src_page);
        }

        /* ungrab the pointer if it's grabbed */
        if (gdk_pointer_is_grabbed ())
        {
            gdk_pointer_ungrab (GDK_CURRENT_TIME);
            gtk_grab_remove (GTK_WIDGET (notebook));
        }
    }
    /* This must be called even if a drag isn't happening */
    drag_stop (notebook);
    return FALSE;
}


static gboolean
motion_notify_cb (EphyNotebook *notebook, GdkEventMotion *event,
          gpointer data)
{
    EphyNotebook *dest;
    gint page_num;
    gint result;

    /* If the notebook only has one tab, we don't want to do
     * anything since ephy can't handle empty notebooks
     */
    if (g_list_length (GTK_NOTEBOOK (notebook)->children) <= 1) {
        return FALSE;
    }

    if ((notebook->priv->drag_in_progress == FALSE)
        && (gtk_drag_check_threshold (GTK_WIDGET (notebook),
                      notebook->priv->x_start,
                      notebook->priv->y_start,
                      event->x_root, event->y_root)))
    {
        gint cur_page;

        cur_page = gtk_notebook_get_current_page (GTK_NOTEBOOK (notebook));
        drag_start (notebook, notebook, cur_page);
    }

    result = find_notebook_and_tab_at_pos ((gint)event->x_root,
                           (gint)event->y_root,
                           &dest, &page_num);

    if (result != NOT_IN_APP_WINDOWS)
    {
        if (dest != notebook)
        {
            move_tab_to_another_notebook (notebook, dest,
                              page_num);
        }
        else
        {
            g_assert (page_num >= -1);
            move_tab (notebook, page_num);
        }
    }

    return FALSE;
}

static gboolean
button_press_cb (EphyNotebook *notebook,
         GdkEventButton *event,
         gpointer data)
{
    gint tab_clicked = find_tab_num_at_pos (notebook,
                        event->x_root,
                        event->y_root);

    if (notebook->priv->drag_in_progress)
    {
        return TRUE;
    }

    if ((event->button == 1) && (event->type == GDK_BUTTON_PRESS)
        && (tab_clicked != -1))
    {
        notebook->priv->x_start = event->x_root;
        notebook->priv->y_start = event->y_root;
        notebook->priv->motion_notify_handler_id =
            g_signal_connect (G_OBJECT (notebook),
                      "motion-notify-event",
                      G_CALLBACK (motion_notify_cb), NULL);
    }

    return FALSE;
}

GtkWidget *
ephy_notebook_new (void)
{
    return GTK_WIDGET (g_object_new (EPHY_NOTEBOOK_TYPE, NULL));
}

static void
ephy_notebook_switch_page_cb (GtkNotebook *notebook,
                             GtkNotebookPage *page,
                             guint page_num,
                             gpointer data)
{
    EphyNotebook *nb = EPHY_NOTEBOOK (notebook);
    GtkWidget *child;

    child = gtk_notebook_get_nth_page (notebook, page_num);

    /* Remove the old page, we dont want to grow unnecessarily
     * the list */
    if (nb->priv->focused_pages)
    {
        nb->priv->focused_pages =
            g_list_remove (nb->priv->focused_pages, child);
    }

    nb->priv->focused_pages = g_list_append (nb->priv->focused_pages,
                         child);

    /* Reset the list of newly opened tabs when switching tabs. */
    g_list_free (nb->priv->opened_tabs);
    nb->priv->opened_tabs = NULL;
}

#define INSANE_NUMBER_OF_URLS   20

static void
notebook_drag_data_received_cb (GtkWidget* widget, GdkDragContext *context,
                gint x, gint y, GtkSelectionData *selection_data,
                guint info, guint time, GtkWidget *child)
{
    EphyEmbed *embed = NULL;
    EphyWindow *window = NULL;
    EphyTab *tab = NULL;
    GtkWidget *toplevel;
    GList *uris = NULL, *l;
    GnomeVFSURI *uri;
    gchar *url = NULL;
    guint num = 0;
    gchar **tmp;

    g_signal_stop_emission_by_name (widget, "drag_data_received");

    if (selection_data->length <= 0 || selection_data->data == NULL) return;

    if (selection_data->target == gdk_atom_intern (EPHY_DND_URL_TYPE, FALSE))
    {
        /* URL_TYPE has format: url \n title */
        tmp = g_strsplit (selection_data->data, "\n", 2);
        if (tmp)
        {
            uri = gnome_vfs_uri_new (tmp[0]);
            if (uri) uris = g_list_append (uris, uri);
            g_strfreev (tmp);
        }
    }
    else if (selection_data->target == gdk_atom_intern (EPHY_DND_URI_LIST_TYPE, FALSE))
    {
        uris = gnome_vfs_uri_list_parse (selection_data->data);
    }
    else
    {
        g_assert_not_reached ();
    }

    if (uris == NULL) return;

    toplevel = gtk_widget_get_toplevel (widget);
    g_return_if_fail (IS_EPHY_WINDOW (toplevel));
    window = EPHY_WINDOW (toplevel);

    if (child)
    {
        embed = EPHY_EMBED (child);
        tab = EPHY_TAB (g_object_get_data (G_OBJECT (embed), "EphyTab"));
    }

    l = uris;
    while (l != NULL && num < INSANE_NUMBER_OF_URLS)
    {
        uri = (GnomeVFSURI*) l->data;
        url = gnome_vfs_uri_to_string (uri, GNOME_VFS_URI_HIDE_NONE);

        if (num == 0 && embed != NULL)
        {
            /**
             * The first url is special: if the drag was to an
             * existing tab, load it there
             */
            ephy_embed_load_url (embed, url);
        }
        else
        {
            tab = ephy_shell_new_tab (ephy_shell, window,
                          tab, url,
                          EPHY_NEW_TAB_OPEN_PAGE |
                          EPHY_NEW_TAB_IN_EXISTING_WINDOW |
                          EPHY_NEW_TAB_APPEND_LAST);
        }

        g_free (url);
        url = NULL;
        l = l->next;
        ++num;
    }

    gnome_vfs_uri_list_free (uris);
}

static void
ephy_notebook_init (EphyNotebook *notebook)
{
    notebook->priv = g_new (EphyNotebookPrivate, 1);

    notebook->priv->current_status = EPHY_NOTEBOOK_TAB_LOAD_NORMAL;

    notebook->priv->title_tips = gtk_tooltips_new ();
    g_object_ref (G_OBJECT (notebook->priv->title_tips));
    gtk_object_sink (GTK_OBJECT (notebook->priv->title_tips));

    notebook->priv->drag_in_progress = FALSE;
    notebook->priv->motion_notify_handler_id = 0;
    notebook->priv->src_notebook = NULL;
    notebook->priv->src_page = -1;
    notebook->priv->focused_pages = NULL;
    notebook->priv->opened_tabs = NULL;

    notebooks = g_list_append (notebooks, notebook);

    g_signal_connect (notebook, "button-press-event",
              (GCallback)button_press_cb, NULL);
    g_signal_connect (notebook, "button-release-event",
              (GCallback)button_release_cb, NULL);
    gtk_widget_add_events (GTK_WIDGET (notebook), GDK_BUTTON1_MOTION_MASK);

    g_signal_connect_after (G_OBJECT (notebook), "switch_page",
                                G_CALLBACK (ephy_notebook_switch_page_cb),
                                NULL);

    /* Set up drag-and-drop target */
    g_signal_connect (G_OBJECT(notebook), "drag_data_received",
              G_CALLBACK(notebook_drag_data_received_cb),
              NULL);
        gtk_drag_dest_set (GTK_WIDGET(notebook), GTK_DEST_DEFAULT_MOTION |
               GTK_DEST_DEFAULT_DROP,
                           url_drag_types,n_url_drag_types,
                           GDK_ACTION_MOVE | GDK_ACTION_COPY);
}

static void
ephy_notebook_finalize (GObject *object)
{
    EphyNotebook *notebook = EPHY_NOTEBOOK (object);

    notebooks = g_list_remove (notebooks, notebook);

    if (notebook->priv->focused_pages)
    {
        g_list_free (notebook->priv->focused_pages);
    }
    g_list_free (notebook->priv->opened_tabs);
    g_object_unref (notebook->priv->title_tips);

    g_free (notebook->priv);
}


void
ephy_notebook_set_page_status (EphyNotebook *nb,
                   GtkWidget *child,
                   EphyNotebookPageLoadStatus status)
{
    GtkWidget *tab, *image, *icon;

    g_return_if_fail (nb != NULL);

    if (status == nb->priv->current_status)
    {
        return;
    }

    tab = gtk_notebook_get_tab_label (GTK_NOTEBOOK (nb), child);

    g_return_if_fail (tab != NULL);

    image  = g_object_get_data (G_OBJECT (tab), "loading-image");

    g_return_if_fail (image != NULL);

    icon = g_object_get_data (G_OBJECT (tab), "icon");

    g_return_if_fail (icon != NULL);

    switch (status)
    {
        case EPHY_NOTEBOOK_TAB_LOAD_LOADING:
            gtk_widget_hide (icon);
            gtk_widget_show (image);
            break;

        case EPHY_NOTEBOOK_TAB_LOAD_COMPLETED:
        case EPHY_NOTEBOOK_TAB_LOAD_NORMAL:
            gtk_widget_hide (image);
            gtk_widget_show (icon);
            break;
    }

    nb->priv->current_status = status;
}

void
ephy_notebook_set_page_icon (EphyNotebook *nb,
                 GtkWidget *child,
                 GdkPixbuf *icon)
{
    GtkWidget *tab, *image;

    g_return_if_fail (nb != NULL);

    tab = gtk_notebook_get_tab_label (GTK_NOTEBOOK (nb), child);

    g_return_if_fail (tab != NULL);

    image  = g_object_get_data (G_OBJECT (tab), "icon");

    g_return_if_fail (image != NULL);

    gtk_image_set_from_pixbuf (GTK_IMAGE (image), icon);
}

static void
ephy_tab_close_button_clicked_cb (GtkWidget *widget,
                  GtkWidget *child)
{
    EphyNotebook *notebook;

    notebook = EPHY_NOTEBOOK (gtk_widget_get_parent (child));
    ephy_notebook_remove_page (notebook, child);
}

static GtkWidget *
tab_build_label (EphyNotebook *nb, GtkWidget *child)
{
    GtkWidget *label, *hbox, *close_button, *image;
    int h, w;
    GClosure *closure;
    GtkWidget *window;
    GtkWidget *loading_image, *icon;
    GtkWidget *label_ebox;
    GdkPixbufAnimation *loading_pixbuf;

    window = gtk_widget_get_toplevel (GTK_WIDGET (nb));

    gtk_icon_size_lookup (GTK_ICON_SIZE_MENU, &w, &h);

    /* set hbox spacing and label padding (see below) so that there's an
     * equal amount of space around the label */
    hbox = gtk_hbox_new (FALSE, 4);

    /* setup close button */
    close_button = gtk_button_new ();
    gtk_button_set_relief (GTK_BUTTON (close_button),
                   GTK_RELIEF_NONE);
    image = gtk_image_new_from_stock (GTK_STOCK_CLOSE,
                      GTK_ICON_SIZE_MENU);
    gtk_widget_set_size_request (close_button, w, h);
    gtk_container_add (GTK_CONTAINER (close_button),
               image);

    /* setup load feedback image */
    loading_pixbuf = gdk_pixbuf_animation_new_from_file (ephy_file ("epiphany-tab-loading.gif"), NULL);
    loading_image = gtk_image_new_from_animation (loading_pixbuf);
    g_object_unref (loading_pixbuf);
    gtk_box_pack_start (GTK_BOX (hbox), loading_image, FALSE, FALSE, 0);

    /* setup site icon, empty by default */
    icon = gtk_image_new ();
    gtk_box_pack_start (GTK_BOX (hbox), icon, FALSE, FALSE, 0);

    /* setup label */
    label_ebox = gtk_event_box_new ();
        label = gtk_label_new (_("Untitled"));
    gtk_misc_set_alignment (GTK_MISC (label), 0.00, 0.5);
        gtk_misc_set_padding (GTK_MISC (label), 4, 0);
    gtk_box_pack_start (GTK_BOX (hbox), label_ebox, TRUE, TRUE, 0);
    gtk_container_add (GTK_CONTAINER (label_ebox), label);

    tab_label_set_size (GTK_WIDGET (window), hbox);

    closure = g_cclosure_new (G_CALLBACK (tab_label_size_request_cb),
                  child, NULL);
    g_object_watch_closure (G_OBJECT (label), closure);
    g_signal_connect_closure_by_id (G_OBJECT (window),
        g_signal_lookup ("size_request",
                 G_OBJECT_TYPE (G_OBJECT (window))), 0,
                                 closure,
                                 FALSE);

    /* setup button */
    gtk_box_pack_start (GTK_BOX (hbox), close_button,
                            FALSE, FALSE, 0);

    g_signal_connect (G_OBJECT (close_button), "clicked",
                          G_CALLBACK (ephy_tab_close_button_clicked_cb),
                          child);

    gtk_widget_show (hbox);
    gtk_widget_show (label_ebox);
    gtk_widget_show (label);
    gtk_widget_show (image);
    gtk_widget_show (close_button);

    g_object_set_data (G_OBJECT (hbox), "label", label);
    g_object_set_data (G_OBJECT (hbox), "label-ebox", label_ebox);
    g_object_set_data (G_OBJECT (hbox), "loading-image", loading_image);
    g_object_set_data (G_OBJECT (hbox), "icon", icon);

    return hbox;
}

/*
 * update_tabs_visibility: Hide tabs if there is only one tab
 * and the pref is not set.
 * HACK We need to show tabs before inserting the second. Otherwise
 * gtknotebook go crazy.
 */
static void
update_tabs_visibility (EphyNotebook *nb, gboolean before_inserting)
{
    gboolean show_tabs;
    guint tabs_num = 1;

    if (before_inserting) tabs_num--;

    show_tabs = eel_gconf_get_boolean (CONF_TABS_TABBED) ||
            gtk_notebook_get_nth_page (GTK_NOTEBOOK (nb), tabs_num) > 0;

    gtk_notebook_set_show_tabs (GTK_NOTEBOOK (nb), show_tabs);
}

void
ephy_notebook_insert_page (EphyNotebook *nb,
               GtkWidget *child,
               int position,
               gboolean jump_to)
{
    GtkWidget *tab_hbox;

    tab_hbox = tab_build_label (nb, child);

    update_tabs_visibility (nb, TRUE);

    if (position == EPHY_NOTEBOOK_INSERT_GROUPED)
    {
        /* Keep a list of newly opened tabs, if the list is empty open the new
         * tab after the current one. If it's not, add it after the newly
         * opened tabs.
         */
        if (nb->priv->opened_tabs != NULL)
        {
            GList *last = g_list_last (nb->priv->opened_tabs);
            GtkWidget *last_tab = last->data;
            position = gtk_notebook_page_num
                    (GTK_NOTEBOOK (nb), last_tab) + 1;
        }
        else
        {
            position = gtk_notebook_get_current_page
                    (GTK_NOTEBOOK (nb)) + 1;
        }
        nb->priv->opened_tabs =
            g_list_append (nb->priv->opened_tabs, child);
    }

    gtk_notebook_insert_page (GTK_NOTEBOOK (nb),
                  child,
                  tab_hbox, position);

    /* Set up drag-and-drop target */
    g_signal_connect (G_OBJECT(tab_hbox), "drag_data_received",
              G_CALLBACK(notebook_drag_data_received_cb), child);
    gtk_drag_dest_set (tab_hbox, GTK_DEST_DEFAULT_ALL,
               url_drag_types,n_url_drag_types,
               GDK_ACTION_MOVE | GDK_ACTION_COPY);

    if (jump_to)
    {
        gtk_notebook_set_current_page (GTK_NOTEBOOK (nb),
                           position);
        g_object_set_data (G_OBJECT (child), "jump_to",
                   GINT_TO_POINTER (jump_to));
    }

    g_signal_emit (G_OBJECT (nb), ephy_notebook_signals[TABS_CHANGED], 0);
}

static void
smart_tab_switching_on_closure (EphyNotebook *nb,
                GtkWidget *child)
{
    gboolean jump_to;

    jump_to = GPOINTER_TO_INT (g_object_get_data
                   (G_OBJECT (child), "jump_to"));

    if (!jump_to || !nb->priv->focused_pages)
    {
        gtk_notebook_next_page (GTK_NOTEBOOK (nb));
    }
    else
    {
        GList *l;
        GtkWidget *child;
        int page_num;

        /* activate the last focused tab */
        l = g_list_last (nb->priv->focused_pages);
        child = GTK_WIDGET (l->data);
        page_num = gtk_notebook_page_num (GTK_NOTEBOOK (nb),
                          child);
        gtk_notebook_set_current_page
            (GTK_NOTEBOOK (nb), page_num);
    }
}

void
ephy_notebook_remove_page (EphyNotebook *nb,
              GtkWidget *child)
{
    int position, cur;
    gboolean last_tab;
    GtkWidget *hbox, *ebox;

    hbox = gtk_notebook_get_tab_label (GTK_NOTEBOOK (nb), child);
    ebox = GTK_WIDGET (g_object_get_data (G_OBJECT (hbox), "label-ebox"));
    gtk_tooltips_set_tip (GTK_TOOLTIPS (nb->priv->title_tips), ebox, NULL, NULL);

    last_tab = gtk_notebook_get_nth_page (GTK_NOTEBOOK (nb), 1) == NULL;
    if (last_tab)
    {
        GtkWidget *window;
        window = gtk_widget_get_toplevel (GTK_WIDGET (nb));
        gtk_widget_destroy (window);
        return;
    }

    /* Remove the page from the focused pages list */
    nb->priv->focused_pages =  g_list_remove (nb->priv->focused_pages,
                          child);
    nb->priv->opened_tabs = g_list_remove (nb->priv->opened_tabs, child);


    position = gtk_notebook_page_num (GTK_NOTEBOOK (nb),
                      child);

    cur = gtk_notebook_get_current_page (GTK_NOTEBOOK (nb));
    if (position == cur)
    {
        smart_tab_switching_on_closure (nb, child);
    }

    gtk_notebook_remove_page (GTK_NOTEBOOK (nb), position);
    g_signal_emit (G_OBJECT (nb), ephy_notebook_signals[TABS_CHANGED], 0);

    update_tabs_visibility (nb, FALSE);
}

void
ephy_notebook_set_page_title (EphyNotebook *nb,
                 GtkWidget *child,
                 const char *title)
{
    GtkWidget *hbox, *ebox, *label;

    hbox = gtk_notebook_get_tab_label (GTK_NOTEBOOK (nb), child);

    label = GTK_WIDGET (g_object_get_data (G_OBJECT (hbox), "label"));
    gtk_label_set_label (GTK_LABEL (label), title);

    ebox = GTK_WIDGET (g_object_get_data (G_OBJECT (hbox), "label-ebox"));
    gtk_tooltips_set_tip (GTK_TOOLTIPS (nb->priv->title_tips), ebox, title, NULL);

    g_signal_emit (G_OBJECT (nb), ephy_notebook_signals[TABS_CHANGED], 0);
}